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s390/dasd: Refactor dasd format functions
[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
c7c0c9de
SH		 1035static void dasd_eckd_clear_conf_data(struct dasd_device *device)
1036{
1037 struct dasd_eckd_private *private;
1038 int i;
1039
1040 private = (struct dasd_eckd_private *) device->private;
1041 private->conf_data = NULL;
1042 private->conf_len = 0;
1043 for (i = 0; i < 8; i++) {
1044 kfree(private->path_conf_data[i]);
1045 private->path_conf_data[i] = NULL;
1046 }
1047}
1048
1049
4abb08c2 1050static int dasd_eckd_read_conf(struct dasd_device *device)
1da177e4
LT		 1051{
1052 void *conf_data;
1053 int conf_len, conf_data_saved;
b179b037 1054 int rc, path_err, pos;
a4d26c6a 1055 __u8 lpm, opm;
b206181d 1056 struct dasd_eckd_private *private, path_private;
a4d26c6a 1057 struct dasd_path *path_data;
b206181d
SH		 1058 struct dasd_uid *uid;
1059 char print_path_uid[60], print_device_uid[60];
1da177e4
LT		 1060
1061 private = (struct dasd_eckd_private *) device->private;
a4d26c6a
SW		 1062 path_data = &device->path_data;
1063 opm = ccw_device_get_path_mask(device->cdev);
1da177e4 1064 conf_data_saved = 0;
55d3a85c 1065 path_err = 0;
1da177e4
LT		 1066 /* get configuration data per operational path */
1067 for (lpm = 0x80; lpm; lpm>>= 1) {
b206181d
SH		 1068 if (!(lpm & opm))
1069 continue;
1070 rc = dasd_eckd_read_conf_lpm(device, &conf_data,
1071 &conf_len, lpm);
1072 if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */
1073 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1074 "Read configuration data returned "
1075 "error %d", rc);
1076 return rc;
1077 }
1078 if (conf_data == NULL) {
1079 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1080 "No configuration data "
1081 "retrieved");
1082 /* no further analysis possible */
1083 path_data->opm |= lpm;
1084 continue; /* no error */
1085 }
1086 /* save first valid configuration data */
1087 if (!conf_data_saved) {
c7c0c9de
SH		 1088 /* initially clear previously stored conf_data */
1089 dasd_eckd_clear_conf_data(device);
b206181d
SH		 1090 private->conf_data = conf_data;
1091 private->conf_len = conf_len;
1092 if (dasd_eckd_identify_conf_parts(private)) {
1093 private->conf_data = NULL;
1094 private->conf_len = 0;
1095 kfree(conf_data);
1096 continue;
1da177e4 1097 }
c7c0c9de
SH		 1098 pos = pathmask_to_pos(lpm);
1099 /* store per path conf_data */
1100 private->path_conf_data[pos] =
1101 (struct dasd_conf_data *) conf_data;
b206181d
SH		 1102 /*
1103 * build device UID that other path data
1104 * can be compared to it
1105 */
1106 dasd_eckd_generate_uid(device);
1107 conf_data_saved++;
1108 } else {
1109 path_private.conf_data = conf_data;
1110 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE;
1111 if (dasd_eckd_identify_conf_parts(
1112 &path_private)) {
1113 path_private.conf_data = NULL;
1114 path_private.conf_len = 0;
1115 kfree(conf_data);
1116 continue;
1da177e4 1117 }
b206181d
SH		 1118 if (dasd_eckd_compare_path_uid(
1119 device, &path_private)) {
1120 uid = &path_private.uid;
1121 if (strlen(uid->vduit) > 0)
1122 snprintf(print_path_uid,
1123 sizeof(print_path_uid),
1124 "%s.%s.%04x.%02x.%s",
1125 uid->vendor, uid->serial,
1126 uid->ssid, uid->real_unit_addr,
1127 uid->vduit);
1128 else
1129 snprintf(print_path_uid,
1130 sizeof(print_path_uid),
1131 "%s.%s.%04x.%02x",
1132 uid->vendor, uid->serial,
1133 uid->ssid,
1134 uid->real_unit_addr);
1135 uid = &private->uid;
1136 if (strlen(uid->vduit) > 0)
1137 snprintf(print_device_uid,
1138 sizeof(print_device_uid),
1139 "%s.%s.%04x.%02x.%s",
1140 uid->vendor, uid->serial,
1141 uid->ssid, uid->real_unit_addr,
1142 uid->vduit);
1143 else
1144 snprintf(print_device_uid,
1145 sizeof(print_device_uid),
1146 "%s.%s.%04x.%02x",
1147 uid->vendor, uid->serial,
1148 uid->ssid,
1149 uid->real_unit_addr);
1150 dev_err(&device->cdev->dev,
1151 "Not all channel paths lead to "
1152 "the same device, path %02X leads to "
1153 "device %s instead of %s\n", lpm,
1154 print_path_uid, print_device_uid);
55d3a85c 1155 path_err = -EINVAL;
5db8440c 1156 path_data->cablepm |= lpm;
55d3a85c 1157 continue;
1da177e4 1158 }
c7c0c9de
SH		 1159 pos = pathmask_to_pos(lpm);
1160 /* store per path conf_data */
1161 private->path_conf_data[pos] =
1162 (struct dasd_conf_data *) conf_data;
b206181d
SH		 1163 path_private.conf_data = NULL;
1164 path_private.conf_len = 0;
1165 }
1166 switch (dasd_eckd_path_access(conf_data, conf_len)) {
1167 case 0x02:
1168 path_data->npm |= lpm;
1169 break;
1170 case 0x03:
1171 path_data->ppm |= lpm;
1172 break;
1da177e4 1173 }
ccc0e7dc
SH		 1174 if (!path_data->opm) {
1175 path_data->opm = lpm;
1176 dasd_generic_path_operational(device);
1177 } else {
1178 path_data->opm |= lpm;
1179 }
5db8440c
SH		 1180 /*
1181 * if the path is used
1182 * it should not be in one of the negative lists
1183 */
1184 path_data->cablepm &= ~lpm;
1185 path_data->hpfpm &= ~lpm;
1186 path_data->cuirpm &= ~lpm;
1da177e4 1187 }
b206181d 1188
55d3a85c 1189 return path_err;
1da177e4
LT		 1190}
1191
a4d26c6a
SW		 1192static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm)
1193{
1194 struct dasd_eckd_private *private;
1195 int mdc;
1196 u32 fcx_max_data;
1197
1198 private = (struct dasd_eckd_private *) device->private;
1199 if (private->fcx_max_data) {
1200 mdc = ccw_device_get_mdc(device->cdev, lpm);
1201 if ((mdc < 0)) {
1202 dev_warn(&device->cdev->dev,
1203 "Detecting the maximum data size for zHPF "
1204 "requests failed (rc=%d) for a new path %x\n",
1205 mdc, lpm);
1206 return mdc;
1207 }
1208 fcx_max_data = mdc * FCX_MAX_DATA_FACTOR;
1209 if (fcx_max_data < private->fcx_max_data) {
1210 dev_warn(&device->cdev->dev,
1211 "The maximum data size for zHPF requests %u "
1212 "on a new path %x is below the active maximum "
1213 "%u\n", fcx_max_data, lpm,
1214 private->fcx_max_data);
1215 return -EACCES;
1216 }
1217 }
1218 return 0;
1219}
1220
b206181d
SH		 1221static int rebuild_device_uid(struct dasd_device *device,
1222 struct path_verification_work_data *data)
1223{
1224 struct dasd_eckd_private *private;
1225 struct dasd_path *path_data;
1226 __u8 lpm, opm;
1227 int rc;
1228
1229 rc = -ENODEV;
1230 private = (struct dasd_eckd_private *) device->private;
1231 path_data = &device->path_data;
1232 opm = device->path_data.opm;
1233
1234 for (lpm = 0x80; lpm; lpm >>= 1) {
1235 if (!(lpm & opm))
1236 continue;
1237 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer));
1238 memset(&data->cqr, 0, sizeof(data->cqr));
1239 data->cqr.cpaddr = &data->ccw;
1240 rc = dasd_eckd_read_conf_immediately(device, &data->cqr,
1241 data->rcd_buffer,
1242 lpm);
1243
1244 if (rc) {
1245 if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */
1246 continue;
1247 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1248 "Read configuration data "
1249 "returned error %d", rc);
1250 break;
1251 }
1252 memcpy(private->conf_data, data->rcd_buffer,
1253 DASD_ECKD_RCD_DATA_SIZE);
1254 if (dasd_eckd_identify_conf_parts(private)) {
1255 rc = -ENODEV;
1256 } else /* first valid path is enough */
1257 break;
1258 }
1259
1260 if (!rc)
1261 rc = dasd_eckd_generate_uid(device);
1262
1263 return rc;
1264}
1265
a4d26c6a
SW		 1266static void do_path_verification_work(struct work_struct *work)
1267{
1268 struct path_verification_work_data *data;
1269 struct dasd_device *device;
b206181d
SH		 1270 struct dasd_eckd_private path_private;
1271 struct dasd_uid *uid;
1272 __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE];
5db8440c 1273 __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm;
a4d26c6a 1274 unsigned long flags;
b206181d 1275 char print_uid[60];
a4d26c6a
SW		 1276 int rc;
1277
1278 data = container_of(work, struct path_verification_work_data, worker);
1279 device = data->device;
1280
c8d1c0ff
SH		 1281 /* delay path verification until device was resumed */
1282 if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) {
1283 schedule_work(work);
1284 return;
1285 }
1eb38023
SH		 1286 /* check if path verification already running and delay if so */
1287 if (test_and_set_bit(DASD_FLAG_PATH_VERIFY, &device->flags)) {
1288 schedule_work(work);
1289 return;
1290 }
a4d26c6a
SW		 1291 opm = 0;
1292 npm = 0;
1293 ppm = 0;
1294 epm = 0;
5db8440c
SH		 1295 hpfpm = 0;
1296 cablepm = 0;
1297
a4d26c6a 1298 for (lpm = 0x80; lpm; lpm >>= 1) {
b206181d
SH		 1299 if (!(lpm & data->tbvpm))
1300 continue;
1301 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer));
1302 memset(&data->cqr, 0, sizeof(data->cqr));
1303 data->cqr.cpaddr = &data->ccw;
1304 rc = dasd_eckd_read_conf_immediately(device, &data->cqr,
1305 data->rcd_buffer,
1306 lpm);
1307 if (!rc) {
1308 switch (dasd_eckd_path_access(data->rcd_buffer,
1309 DASD_ECKD_RCD_DATA_SIZE)
1310 ) {
1311 case 0x02:
1312 npm |= lpm;
1313 break;
1314 case 0x03:
1315 ppm |= lpm;
1316 break;
1317 }
1318 opm |= lpm;
1319 } else if (rc == -EOPNOTSUPP) {
1320 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1321 "path verification: No configuration "
1322 "data retrieved");
1323 opm |= lpm;
1324 } else if (rc == -EAGAIN) {
1325 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
a4d26c6a
SW		 1326 "path verification: device is stopped,"
1327 " try again later");
b206181d
SH		 1328 epm |= lpm;
1329 } else {
1330 dev_warn(&device->cdev->dev,
1331 "Reading device feature codes failed "
1332 "(rc=%d) for new path %x\n", rc, lpm);
1333 continue;
1334 }
1335 if (verify_fcx_max_data(device, lpm)) {
1336 opm &= ~lpm;
1337 npm &= ~lpm;
1338 ppm &= ~lpm;
5db8440c 1339 hpfpm |= lpm;
b206181d
SH		 1340 continue;
1341 }
1342
1343 /*
1344 * save conf_data for comparison after
1345 * rebuild_device_uid may have changed
1346 * the original data
1347 */
1348 memcpy(&path_rcd_buf, data->rcd_buffer,
1349 DASD_ECKD_RCD_DATA_SIZE);
1350 path_private.conf_data = (void *) &path_rcd_buf;
1351 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE;
1352 if (dasd_eckd_identify_conf_parts(&path_private)) {
1353 path_private.conf_data = NULL;
1354 path_private.conf_len = 0;
1355 continue;
1356 }
1357
1358 /*
1359 * compare path UID with device UID only if at least
1360 * one valid path is left
1361 * in other case the device UID may have changed and
1362 * the first working path UID will be used as device UID
1363 */
1364 if (device->path_data.opm &&
1365 dasd_eckd_compare_path_uid(device, &path_private)) {
1366 /*
1367 * the comparison was not successful
1368 * rebuild the device UID with at least one
1369 * known path in case a z/VM hyperswap command
1370 * has changed the device
1371 *
1372 * after this compare again
1373 *
1374 * if either the rebuild or the recompare fails
1375 * the path can not be used
1376 */
1377 if (rebuild_device_uid(device, data) ||
1378 dasd_eckd_compare_path_uid(
1379 device, &path_private)) {
1380 uid = &path_private.uid;
1381 if (strlen(uid->vduit) > 0)
1382 snprintf(print_uid, sizeof(print_uid),
1383 "%s.%s.%04x.%02x.%s",
1384 uid->vendor, uid->serial,
1385 uid->ssid, uid->real_unit_addr,
1386 uid->vduit);
1387 else
1388 snprintf(print_uid, sizeof(print_uid),
1389 "%s.%s.%04x.%02x",
1390 uid->vendor, uid->serial,
1391 uid->ssid,
1392 uid->real_unit_addr);
1393 dev_err(&device->cdev->dev,
1394 "The newly added channel path %02X "
1395 "will not be used because it leads "
1396 "to a different device %s\n",
1397 lpm, print_uid);
a4d26c6a
SW		 1398 opm &= ~lpm;
1399 npm &= ~lpm;
1400 ppm &= ~lpm;
5db8440c 1401 cablepm |= lpm;
b206181d 1402 continue;
a4d26c6a
SW		 1403 }
1404 }
b206181d
SH		 1405
1406 /*
1407 * There is a small chance that a path is lost again between
1408 * above path verification and the following modification of
1409 * the device opm mask. We could avoid that race here by using
1410 * yet another path mask, but we rather deal with this unlikely
1411 * situation in dasd_start_IO.
1412 */
1413 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
1414 if (!device->path_data.opm && opm) {
1415 device->path_data.opm = opm;
5db8440c
SH		 1416 device->path_data.cablepm &= ~opm;
1417 device->path_data.cuirpm &= ~opm;
1418 device->path_data.hpfpm &= ~opm;
b206181d 1419 dasd_generic_path_operational(device);
5db8440c 1420 } else {
b206181d 1421 device->path_data.opm |= opm;
5db8440c
SH		 1422 device->path_data.cablepm &= ~opm;
1423 device->path_data.cuirpm &= ~opm;
1424 device->path_data.hpfpm &= ~opm;
1425 }
b206181d
SH		 1426 device->path_data.npm |= npm;
1427 device->path_data.ppm |= ppm;
1428 device->path_data.tbvpm |= epm;
5db8440c
SH		 1429 device->path_data.cablepm |= cablepm;
1430 device->path_data.hpfpm |= hpfpm;
b206181d 1431 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
a4d26c6a 1432 }
1eb38023 1433 clear_bit(DASD_FLAG_PATH_VERIFY, &device->flags);
a4d26c6a
SW		 1434 dasd_put_device(device);
1435 if (data->isglobal)
1436 mutex_unlock(&dasd_path_verification_mutex);
1437 else
1438 kfree(data);
1439}
1440
1441static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm)
1442{
1443 struct path_verification_work_data *data;
1444
1445 data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA);
1446 if (!data) {
1447 if (mutex_trylock(&dasd_path_verification_mutex)) {
1448 data = path_verification_worker;
1449 data->isglobal = 1;
1450 } else
1451 return -ENOMEM;
1452 } else {
1453 memset(data, 0, sizeof(*data));
1454 data->isglobal = 0;
1455 }
1456 INIT_WORK(&data->worker, do_path_verification_work);
1457 dasd_get_device(device);
1458 data->device = device;
1459 data->tbvpm = lpm;
1460 schedule_work(&data->worker);
1461 return 0;
1462}
1463
8e09f215
SW		 1464static int dasd_eckd_read_features(struct dasd_device *device)
1465{
1466 struct dasd_psf_prssd_data *prssdp;
1467 struct dasd_rssd_features *features;
1468 struct dasd_ccw_req *cqr;
1469 struct ccw1 *ccw;
1470 int rc;
1471 struct dasd_eckd_private *private;
1472
1473 private = (struct dasd_eckd_private *) device->private;
68d1e5f0 1474 memset(&private->features, 0, sizeof(struct dasd_rssd_features));
68b781fe 1475 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
8e09f215
SW		 1476 (sizeof(struct dasd_psf_prssd_data) +
1477 sizeof(struct dasd_rssd_features)),
1478 device);
1479 if (IS_ERR(cqr)) {
b8ed5dd5
SH		 1480 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not "
1481 "allocate initialization request");
8e09f215
SW		 1482 return PTR_ERR(cqr);
1483 }
1484 cqr->startdev = device;
1485 cqr->memdev = device;
1486 cqr->block = NULL;
eb6e199b 1487 cqr->retries = 256;
8e09f215
SW		 1488 cqr->expires = 10 * HZ;
1489
1490 /* Prepare for Read Subsystem Data */
1491 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
1492 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
1493 prssdp->order = PSF_ORDER_PRSSD;
1494 prssdp->suborder = 0x41; /* Read Feature Codes */
1495 /* all other bytes of prssdp must be zero */
1496
1497 ccw = cqr->cpaddr;
1498 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1499 ccw->count = sizeof(struct dasd_psf_prssd_data);
1500 ccw->flags |= CCW_FLAG_CC;
1501 ccw->cda = (__u32)(addr_t) prssdp;
1502
1503 /* Read Subsystem Data - feature codes */
1504 features = (struct dasd_rssd_features *) (prssdp + 1);
1505 memset(features, 0, sizeof(struct dasd_rssd_features));
1506
1507 ccw++;
1508 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
1509 ccw->count = sizeof(struct dasd_rssd_features);
1510 ccw->cda = (__u32)(addr_t) features;
1511
1aae0560 1512 cqr->buildclk = get_tod_clock();
8e09f215
SW		 1513 cqr->status = DASD_CQR_FILLED;
1514 rc = dasd_sleep_on(cqr);
1515 if (rc == 0) {
1516 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
1517 features = (struct dasd_rssd_features *) (prssdp + 1);
1518 memcpy(&private->features, features,
1519 sizeof(struct dasd_rssd_features));
68d1e5f0
SW		 1520 } else
1521 dev_warn(&device->cdev->dev, "Reading device feature codes"
1522 " failed with rc=%d\n", rc);
8e09f215
SW		 1523 dasd_sfree_request(cqr, cqr->memdev);
1524 return rc;
1525}
1526
1527
40545573
HH		 1528/*
1529 * Build CP for Perform Subsystem Function - SSC.
1530 */
f3eb5384
SW		 1531static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device,
1532 int enable_pav)
40545573 1533{
8e09f215
SW		 1534 struct dasd_ccw_req *cqr;
1535 struct dasd_psf_ssc_data *psf_ssc_data;
1536 struct ccw1 *ccw;
40545573 1537
68b781fe 1538 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ ,
40545573
HH		 1539 sizeof(struct dasd_psf_ssc_data),
1540 device);
1541
8e09f215 1542 if (IS_ERR(cqr)) {
fc19f381 1543 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
40545573 1544 "Could not allocate PSF-SSC request");
8e09f215
SW		 1545 return cqr;
1546 }
1547 psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data;
1548 psf_ssc_data->order = PSF_ORDER_SSC;
626350b6 1549 psf_ssc_data->suborder = 0xc0;
f3eb5384 1550 if (enable_pav) {
626350b6 1551 psf_ssc_data->suborder |= 0x08;
f3eb5384
SW		 1552 psf_ssc_data->reserved[0] = 0x88;
1553 }
8e09f215
SW		 1554 ccw = cqr->cpaddr;
1555 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1556 ccw->cda = (__u32)(addr_t)psf_ssc_data;
1557 ccw->count = 66;
1558
1559 cqr->startdev = device;
1560 cqr->memdev = device;
1561 cqr->block = NULL;
eb6e199b 1562 cqr->retries = 256;
8e09f215 1563 cqr->expires = 10*HZ;
1aae0560 1564 cqr->buildclk = get_tod_clock();
8e09f215
SW		 1565 cqr->status = DASD_CQR_FILLED;
1566 return cqr;
40545573
HH		 1567}
1568
1569/*
1570 * Perform Subsystem Function.
1571 * It is necessary to trigger CIO for channel revalidation since this
1572 * call might change behaviour of DASD devices.
1573 */
1574static int
12d7b107
SH		 1575dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav,
1576 unsigned long flags)
40545573 1577{
8e09f215
SW		 1578 struct dasd_ccw_req *cqr;
1579 int rc;
1580
f3eb5384 1581 cqr = dasd_eckd_build_psf_ssc(device, enable_pav);
8e09f215
SW		 1582 if (IS_ERR(cqr))
1583 return PTR_ERR(cqr);
1584
12d7b107
SH		 1585 /*
1586 * set flags e.g. turn on failfast, to prevent blocking
1587 * the calling function should handle failed requests
1588 */
1589 cqr->flags |= flags;
1590
8e09f215
SW		 1591 rc = dasd_sleep_on(cqr);
1592 if (!rc)
1593 /* trigger CIO to reprobe devices */
1594 css_schedule_reprobe();
12d7b107
SH		 1595 else if (cqr->intrc == -EAGAIN)
1596 rc = -EAGAIN;
1597
8e09f215
SW		 1598 dasd_sfree_request(cqr, cqr->memdev);
1599 return rc;
40545573
HH		 1600}
1601
1602/*
1603 * Valide storage server of current device.
1604 */
12d7b107
SH		 1605static int dasd_eckd_validate_server(struct dasd_device *device,
1606 unsigned long flags)
40545573
HH		 1607{
1608 int rc;
8e09f215 1609 struct dasd_eckd_private *private;
f3eb5384 1610 int enable_pav;
40545573 1611
f9f8d02f
SH		 1612 private = (struct dasd_eckd_private *) device->private;
1613 if (private->uid.type == UA_BASE_PAV_ALIAS ||
1614 private->uid.type == UA_HYPER_PAV_ALIAS)
12d7b107 1615 return 0;
40545573 1616 if (dasd_nopav || MACHINE_IS_VM)
f3eb5384
SW		 1617 enable_pav = 0;
1618 else
1619 enable_pav = 1;
12d7b107 1620 rc = dasd_eckd_psf_ssc(device, enable_pav, flags);
eb6e199b 1621
8e79a441
HH		 1622 /* may be requested feature is not available on server,
1623 * therefore just report error and go ahead */
b8ed5dd5
SH		 1624 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x "
1625 "returned rc=%d", private->uid.ssid, rc);
12d7b107 1626 return rc;
40545573
HH		 1627}
1628
f1633031
SH		 1629/*
1630 * worker to do a validate server in case of a lost pathgroup
1631 */
1632static void dasd_eckd_do_validate_server(struct work_struct *work)
1633{
1634 struct dasd_device *device = container_of(work, struct dasd_device,
1635 kick_validate);
ea4da6ea
SH		 1636 unsigned long flags = 0;
1637
1638 set_bit(DASD_CQR_FLAGS_FAILFAST, &flags);
1639 if (dasd_eckd_validate_server(device, flags)
12d7b107
SH		 1640 == -EAGAIN) {
1641 /* schedule worker again if failed */
1642 schedule_work(&device->kick_validate);
1643 return;
1644 }
1645
f1633031
SH		 1646 dasd_put_device(device);
1647}
1648
1649static void dasd_eckd_kick_validate_server(struct dasd_device *device)
1650{
1651 dasd_get_device(device);
25e2cf1c
SH		 1652 /* exit if device not online or in offline processing */
1653 if (test_bit(DASD_FLAG_OFFLINE, &device->flags) ||
1654 device->state < DASD_STATE_ONLINE) {
1655 dasd_put_device(device);
1656 return;
1657 }
f1633031 1658 /* queue call to do_validate_server to the kernel event daemon. */
f2608cd4
SH		 1659 if (!schedule_work(&device->kick_validate))
1660 dasd_put_device(device);
f1633031
SH		 1661}
1662
ef19298b
SW		 1663static u32 get_fcx_max_data(struct dasd_device *device)
1664{
ef19298b
SW		 1665 int tpm, mdc;
1666 int fcx_in_css, fcx_in_gneq, fcx_in_features;
1667 struct dasd_eckd_private *private;
1668
1669 if (dasd_nofcx)
1670 return 0;
1671 /* is transport mode supported? */
1672 private = (struct dasd_eckd_private *) device->private;
1673 fcx_in_css = css_general_characteristics.fcx;
1674 fcx_in_gneq = private->gneq->reserved2[7] & 0x04;
1675 fcx_in_features = private->features.feature[40] & 0x80;
1676 tpm = fcx_in_css && fcx_in_gneq && fcx_in_features;
1677
1678 if (!tpm)
1679 return 0;
1680
1681 mdc = ccw_device_get_mdc(device->cdev, 0);
1682 if (mdc < 0) {
1683 dev_warn(&device->cdev->dev, "Detecting the maximum supported"
1684 " data size for zHPF requests failed\n");
1685 return 0;
1686 } else
1687 return mdc * FCX_MAX_DATA_FACTOR;
ef19298b
SW		 1688}
1689
3d052595
HH		 1690/*
1691 * Check device characteristics.
1692 * If the device is accessible using ECKD discipline, the device is enabled.
1693 */
1da177e4
LT		 1694static int
1695dasd_eckd_check_characteristics(struct dasd_device *device)
1696{
1697 struct dasd_eckd_private *private;
8e09f215 1698 struct dasd_block *block;
2dedf0d9 1699 struct dasd_uid temp_uid;
f9f8d02f 1700 int rc, i;
33b62a30 1701 int readonly;
7c8faa86 1702 unsigned long value;
1da177e4 1703
f1633031
SH		 1704 /* setup work queue for validate server*/
1705 INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server);
1706
454e1fa1
PO		 1707 if (!ccw_device_is_pathgroup(device->cdev)) {
1708 dev_warn(&device->cdev->dev,
1709 "A channel path group could not be established\n");
1710 return -EIO;
1711 }
1712 if (!ccw_device_is_multipath(device->cdev)) {
1713 dev_info(&device->cdev->dev,
1714 "The DASD is not operating in multipath mode\n");
1715 }
1da177e4 1716 private = (struct dasd_eckd_private *) device->private;
92636b15
SO		 1717 if (!private) {
1718 private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA);
1719 if (!private) {
fc19f381
SH		 1720 dev_warn(&device->cdev->dev,
1721 "Allocating memory for private DASD data "
1722 "failed\n");
1da177e4
LT		 1723 return -ENOMEM;
1724 }
1da177e4 1725 device->private = (void *) private;
92636b15
SO		 1726 } else {
1727 memset(private, 0, sizeof(*private));
1da177e4
LT		 1728 }
1729 /* Invalidate status of initial analysis. */
1730 private->init_cqr_status = -1;
1731 /* Set default cache operations. */
1732 private->attrib.operation = DASD_NORMAL_CACHE;
1733 private->attrib.nr_cyl = 0;
1734
40545573
HH		 1735 /* Read Configuration Data */
1736 rc = dasd_eckd_read_conf(device);
1737 if (rc)
8e09f215 1738 goto out_err1;
40545573 1739
7c8faa86
SH		 1740 /* set default timeout */
1741 device->default_expires = DASD_EXPIRES;
1f1ee9ad
HR		 1742 /* set default retry count */
1743 device->default_retries = DASD_RETRIES;
1744
7c8faa86
SH		 1745 if (private->gneq) {
1746 value = 1;
1747 for (i = 0; i < private->gneq->timeout.value; i++)
1748 value = 10 * value;
1749 value = value * private->gneq->timeout.number;
1750 /* do not accept useless values */
1751 if (value != 0 && value <= DASD_EXPIRES_MAX)
1752 device->default_expires = value;
1753 }
1754
2dedf0d9
SH		 1755 dasd_eckd_get_uid(device, &temp_uid);
1756 if (temp_uid.type == UA_BASE_DEVICE) {
8e09f215
SW		 1757 block = dasd_alloc_block();
1758 if (IS_ERR(block)) {
b8ed5dd5
SH		 1759 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1760 "could not allocate dasd "
1761 "block structure");
8e09f215
SW		 1762 rc = PTR_ERR(block);
1763 goto out_err1;
1764 }
1765 device->block = block;
1766 block->base = device;
1767 }
1768
f9f8d02f
SH		 1769 /* register lcu with alias handling, enable PAV */
1770 rc = dasd_alias_make_device_known_to_lcu(device);
1771 if (rc)
8e09f215 1772 goto out_err2;
f9f8d02f 1773
12d7b107 1774 dasd_eckd_validate_server(device, 0);
f4ac1d02
SW		 1775
1776 /* device may report different configuration data after LCU setup */
1777 rc = dasd_eckd_read_conf(device);
1778 if (rc)
1779 goto out_err3;
8e09f215
SW		 1780
1781 /* Read Feature Codes */
68d1e5f0 1782 dasd_eckd_read_features(device);
40545573 1783
1da177e4 1784 /* Read Device Characteristics */
68b781fe
SH		 1785 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
1786 &private->rdc_data, 64);
8e09f215 1787 if (rc) {
b8ed5dd5
SH		 1788 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1789 "Read device characteristic failed, rc=%d", rc);
8e09f215
SW		 1790 goto out_err3;
1791 }
34cd551a
SH		 1792
1793 if ((device->features & DASD_FEATURE_USERAW) &&
1794 !(private->rdc_data.facilities.RT_in_LR)) {
1795 dev_err(&device->cdev->dev, "The storage server does not "
1796 "support raw-track access\n");
1797 rc = -EINVAL;
1798 goto out_err3;
1799 }
1800
817f2c84 1801 /* find the valid cylinder size */
b44b0ab3
SW		 1802 if (private->rdc_data.no_cyl == LV_COMPAT_CYL &&
1803 private->rdc_data.long_no_cyl)
1804 private->real_cyl = private->rdc_data.long_no_cyl;
1805 else
1806 private->real_cyl = private->rdc_data.no_cyl;
1807
ef19298b
SW		 1808 private->fcx_max_data = get_fcx_max_data(device);
1809
33b62a30
SW		 1810 readonly = dasd_device_is_ro(device);
1811 if (readonly)
1812 set_bit(DASD_FLAG_DEVICE_RO, &device->flags);
1813
fc19f381 1814 dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) "
33b62a30 1815 "with %d cylinders, %d heads, %d sectors%s\n",
fc19f381
SH		 1816 private->rdc_data.dev_type,
1817 private->rdc_data.dev_model,
1818 private->rdc_data.cu_type,
1819 private->rdc_data.cu_model.model,
92636b15 1820 private->real_cyl,
fc19f381 1821 private->rdc_data.trk_per_cyl,
33b62a30
SW		 1822 private->rdc_data.sec_per_trk,
1823 readonly ? ", read-only device" : "");
8e09f215
SW		 1824 return 0;
1825
1826out_err3:
1827 dasd_alias_disconnect_device_from_lcu(device);
1828out_err2:
1829 dasd_free_block(device->block);
1830 device->block = NULL;
1831out_err1:
4abb08c2 1832 kfree(private->conf_data);
8e09f215
SW		 1833 kfree(device->private);
1834 device->private = NULL;
3d052595 1835 return rc;
1da177e4
LT		 1836}
1837
8e09f215
SW		 1838static void dasd_eckd_uncheck_device(struct dasd_device *device)
1839{
4abb08c2 1840 struct dasd_eckd_private *private;
b179b037 1841 int i;
4abb08c2
SW		 1842
1843 private = (struct dasd_eckd_private *) device->private;
8e09f215 1844 dasd_alias_disconnect_device_from_lcu(device);
4abb08c2
SW		 1845 private->ned = NULL;
1846 private->sneq = NULL;
1847 private->vdsneq = NULL;
1848 private->gneq = NULL;
1849 private->conf_len = 0;
b179b037
SH		 1850 for (i = 0; i < 8; i++) {
1851 kfree(private->path_conf_data[i]);
1852 if ((__u8 *)private->path_conf_data[i] ==
1853 private->conf_data) {
1854 private->conf_data = NULL;
1855 private->conf_len = 0;
1856 }
1857 private->path_conf_data[i] = NULL;
1858 }
4abb08c2
SW		 1859 kfree(private->conf_data);
1860 private->conf_data = NULL;
8e09f215
SW		 1861}
1862
1da177e4
LT		 1863static struct dasd_ccw_req *
1864dasd_eckd_analysis_ccw(struct dasd_device *device)
1865{
1866 struct dasd_eckd_private *private;
1867 struct eckd_count *count_data;
1868 struct LO_eckd_data *LO_data;
1869 struct dasd_ccw_req *cqr;
1870 struct ccw1 *ccw;
1871 int cplength, datasize;
1872 int i;
1873
1874 private = (struct dasd_eckd_private *) device->private;
1875
1876 cplength = 8;
1877 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data);
68b781fe 1878 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device);
1da177e4
LT		 1879 if (IS_ERR(cqr))
1880 return cqr;
1881 ccw = cqr->cpaddr;
1882 /* Define extent for the first 3 tracks. */
1883 define_extent(ccw++, cqr->data, 0, 2,
1884 DASD_ECKD_CCW_READ_COUNT, device);
8e09f215 1885 LO_data = cqr->data + sizeof(struct DE_eckd_data);
1da177e4
LT		 1886 /* Locate record for the first 4 records on track 0. */
1887 ccw[-1].flags |= CCW_FLAG_CC;
1888 locate_record(ccw++, LO_data++, 0, 0, 4,
1889 DASD_ECKD_CCW_READ_COUNT, device, 0);
1890
1891 count_data = private->count_area;
1892 for (i = 0; i < 4; i++) {
1893 ccw[-1].flags |= CCW_FLAG_CC;
1894 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1895 ccw->flags = 0;
1896 ccw->count = 8;
1897 ccw->cda = (__u32)(addr_t) count_data;
1898 ccw++;
1899 count_data++;
1900 }
1901
1902 /* Locate record for the first record on track 2. */
1903 ccw[-1].flags |= CCW_FLAG_CC;
1904 locate_record(ccw++, LO_data++, 2, 0, 1,
1905 DASD_ECKD_CCW_READ_COUNT, device, 0);
1906 /* Read count ccw. */
1907 ccw[-1].flags |= CCW_FLAG_CC;
1908 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1909 ccw->flags = 0;
1910 ccw->count = 8;
1911 ccw->cda = (__u32)(addr_t) count_data;
1912
8e09f215
SW		 1913 cqr->block = NULL;
1914 cqr->startdev = device;
1915 cqr->memdev = device;
eb6e199b 1916 cqr->retries = 255;
1aae0560 1917 cqr->buildclk = get_tod_clock();
1da177e4
LT		 1918 cqr->status = DASD_CQR_FILLED;
1919 return cqr;
1920}
1921
eb6e199b
SW		 1922/* differentiate between 'no record found' and any other error */
1923static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr)
1924{
1925 char *sense;
1926 if (init_cqr->status == DASD_CQR_DONE)
1927 return INIT_CQR_OK;
1928 else if (init_cqr->status == DASD_CQR_NEED_ERP ||
1929 init_cqr->status == DASD_CQR_FAILED) {
1930 sense = dasd_get_sense(&init_cqr->irb);
1931 if (sense && (sense[1] & SNS1_NO_REC_FOUND))
1932 return INIT_CQR_UNFORMATTED;
1933 else
1934 return INIT_CQR_ERROR;
1935 } else
1936 return INIT_CQR_ERROR;
1937}
1938
1da177e4
LT		 1939/*
1940 * This is the callback function for the init_analysis cqr. It saves
1941 * the status of the initial analysis ccw before it frees it and kicks
1942 * the device to continue the startup sequence. This will call
1943 * dasd_eckd_do_analysis again (if the devices has not been marked
1944 * for deletion in the meantime).
1945 */
eb6e199b
SW		 1946static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr,
1947 void *data)
1da177e4
LT		 1948{
1949 struct dasd_eckd_private *private;
1950 struct dasd_device *device;
1951
8e09f215 1952 device = init_cqr->startdev;
1da177e4 1953 private = (struct dasd_eckd_private *) device->private;
eb6e199b 1954 private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr);
1da177e4
LT		 1955 dasd_sfree_request(init_cqr, device);
1956 dasd_kick_device(device);
1957}
1958
eb6e199b 1959static int dasd_eckd_start_analysis(struct dasd_block *block)
1da177e4 1960{
1da177e4
LT		 1961 struct dasd_ccw_req *init_cqr;
1962
8e09f215 1963 init_cqr = dasd_eckd_analysis_ccw(block->base);
1da177e4
LT		 1964 if (IS_ERR(init_cqr))
1965 return PTR_ERR(init_cqr);
1966 init_cqr->callback = dasd_eckd_analysis_callback;
1967 init_cqr->callback_data = NULL;
1968 init_cqr->expires = 5*HZ;
eb6e199b
SW		 1969 /* first try without ERP, so we can later handle unformatted
1970 * devices as special case
1971 */
1972 clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags);
1973 init_cqr->retries = 0;
1da177e4
LT		 1974 dasd_add_request_head(init_cqr);
1975 return -EAGAIN;
1976}
1977
eb6e199b 1978static int dasd_eckd_end_analysis(struct dasd_block *block)
1da177e4 1979{
8e09f215 1980 struct dasd_device *device;
1da177e4
LT		 1981 struct dasd_eckd_private *private;
1982 struct eckd_count *count_area;
1983 unsigned int sb, blk_per_trk;
1984 int status, i;
eb6e199b 1985 struct dasd_ccw_req *init_cqr;
1da177e4 1986
8e09f215 1987 device = block->base;
1da177e4
LT		 1988 private = (struct dasd_eckd_private *) device->private;
1989 status = private->init_cqr_status;
1990 private->init_cqr_status = -1;
eb6e199b
SW		 1991 if (status == INIT_CQR_ERROR) {
1992 /* try again, this time with full ERP */
1993 init_cqr = dasd_eckd_analysis_ccw(device);
1994 dasd_sleep_on(init_cqr);
1995 status = dasd_eckd_analysis_evaluation(init_cqr);
1996 dasd_sfree_request(init_cqr, device);
1997 }
1998
e4dbb0f2
SH		 1999 if (device->features & DASD_FEATURE_USERAW) {
2000 block->bp_block = DASD_RAW_BLOCKSIZE;
2001 blk_per_trk = DASD_RAW_BLOCK_PER_TRACK;
2002 block->s2b_shift = 3;
2003 goto raw;
2004 }
2005
eb6e199b
SW		 2006 if (status == INIT_CQR_UNFORMATTED) {
2007 dev_warn(&device->cdev->dev, "The DASD is not formatted\n");
1da177e4 2008 return -EMEDIUMTYPE;
eb6e199b
SW		 2009 } else if (status == INIT_CQR_ERROR) {
2010 dev_err(&device->cdev->dev,
2011 "Detecting the DASD disk layout failed because "
2012 "of an I/O error\n");
2013 return -EIO;
1da177e4
LT		 2014 }
2015
2016 private->uses_cdl = 1;
1da177e4
LT		 2017 /* Check Track 0 for Compatible Disk Layout */
2018 count_area = NULL;
2019 for (i = 0; i < 3; i++) {
2020 if (private->count_area[i].kl != 4 ||
3bc9fef9
SH		 2021 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 ||
2022 private->count_area[i].cyl != 0 ||
2023 private->count_area[i].head != count_area_head[i] ||
2024 private->count_area[i].record != count_area_rec[i]) {
1da177e4
LT		 2025 private->uses_cdl = 0;
2026 break;
2027 }
2028 }
2029 if (i == 3)
2030 count_area = &private->count_area[4];
2031
2032 if (private->uses_cdl == 0) {
2033 for (i = 0; i < 5; i++) {
2034 if ((private->count_area[i].kl != 0) ||
2035 (private->count_area[i].dl !=
3bc9fef9
SH		 2036 private->count_area[0].dl) ||
2037 private->count_area[i].cyl != 0 ||
2038 private->count_area[i].head != count_area_head[i] ||
2039 private->count_area[i].record != count_area_rec[i])
1da177e4
LT		 2040 break;
2041 }
2042 if (i == 5)
2043 count_area = &private->count_area[0];
2044 } else {
2045 if (private->count_area[3].record == 1)
fc19f381
SH		 2046 dev_warn(&device->cdev->dev,
2047 "Track 0 has no records following the VTOC\n");
1da177e4 2048 }
e4dbb0f2 2049
1da177e4
LT		 2050 if (count_area != NULL && count_area->kl == 0) {
2051 /* we found notthing violating our disk layout */
2052 if (dasd_check_blocksize(count_area->dl) == 0)
8e09f215 2053 block->bp_block = count_area->dl;
1da177e4 2054 }
8e09f215 2055 if (block->bp_block == 0) {
fc19f381
SH		 2056 dev_warn(&device->cdev->dev,
2057 "The disk layout of the DASD is not supported\n");
1da177e4
LT		 2058 return -EMEDIUMTYPE;
2059 }
8e09f215
SW		 2060 block->s2b_shift = 0; /* bits to shift 512 to get a block */
2061 for (sb = 512; sb < block->bp_block; sb = sb << 1)
2062 block->s2b_shift++;
1da177e4 2063
8e09f215 2064 blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block);
e4dbb0f2
SH		 2065
2066raw:
b44b0ab3 2067 block->blocks = (private->real_cyl *
1da177e4
LT		 2068 private->rdc_data.trk_per_cyl *
2069 blk_per_trk);
2070
fc19f381
SH		 2071 dev_info(&device->cdev->dev,
2072 "DASD with %d KB/block, %d KB total size, %d KB/track, "
2073 "%s\n", (block->bp_block >> 10),
2074 ((private->real_cyl *
2075 private->rdc_data.trk_per_cyl *
2076 blk_per_trk * (block->bp_block >> 9)) >> 1),
2077 ((blk_per_trk * block->bp_block) >> 10),
2078 private->uses_cdl ?
2079 "compatible disk layout" : "linux disk layout");
1da177e4
LT		 2080
2081 return 0;
2082}
2083
8e09f215 2084static int dasd_eckd_do_analysis(struct dasd_block *block)
1da177e4
LT		 2085{
2086 struct dasd_eckd_private *private;
2087
8e09f215 2088 private = (struct dasd_eckd_private *) block->base->private;
1da177e4 2089 if (private->init_cqr_status < 0)
8e09f215 2090 return dasd_eckd_start_analysis(block);
1da177e4 2091 else
8e09f215 2092 return dasd_eckd_end_analysis(block);
1da177e4
LT		 2093}
2094
d42e1712 2095static int dasd_eckd_basic_to_ready(struct dasd_device *device)
8e09f215
SW		 2096{
2097 return dasd_alias_add_device(device);
2098};
2099
2100static int dasd_eckd_online_to_ready(struct dasd_device *device)
2101{
501183f2 2102 cancel_work_sync(&device->reload_device);
25e2cf1c 2103 cancel_work_sync(&device->kick_validate);
d42e1712
SH		 2104 return 0;
2105};
2106
daa991bf 2107static int dasd_eckd_basic_to_known(struct dasd_device *device)
d42e1712 2108{
8e09f215
SW		 2109 return dasd_alias_remove_device(device);
2110};
2111
1da177e4 2112static int
8e09f215 2113dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo)
1da177e4
LT		 2114{
2115 struct dasd_eckd_private *private;
2116
8e09f215
SW		 2117 private = (struct dasd_eckd_private *) block->base->private;
2118 if (dasd_check_blocksize(block->bp_block) == 0) {
1da177e4 2119 geo->sectors = recs_per_track(&private->rdc_data,
8e09f215 2120 0, block->bp_block);
1da177e4
LT		 2121 }
2122 geo->cylinders = private->rdc_data.no_cyl;
2123 geo->heads = private->rdc_data.trk_per_cyl;
2124 return 0;
2125}
2126
2127static struct dasd_ccw_req *
d42e1712 2128dasd_eckd_build_format(struct dasd_device *base,
29b8dd9d 2129 struct format_data_t *fdata,
a94fa154 2130 int enable_pav)
1da177e4 2131{
d42e1712
SH		 2132 struct dasd_eckd_private *base_priv;
2133 struct dasd_eckd_private *start_priv;
29b8dd9d 2134 struct dasd_device *startdev = NULL;
1da177e4
LT		 2135 struct dasd_ccw_req *fcp;
2136 struct eckd_count *ect;
d42e1712 2137 struct ch_t address;
1da177e4
LT		 2138 struct ccw1 *ccw;
2139 void *data;
b44b0ab3 2140 int rpt;
1da177e4 2141 int cplength, datasize;
d42e1712 2142 int i, j;
f9a28f7b
JBJ		 2143 int intensity = 0;
2144 int r0_perm;
d42e1712 2145 int nr_tracks;
18d6624e 2146 int use_prefix;
1da177e4 2147
a94fa154 2148 if (enable_pav)
29b8dd9d
SH		 2149 startdev = dasd_alias_get_start_dev(base);
2150
d42e1712
SH		 2151 if (!startdev)
2152 startdev = base;
1da177e4 2153
d42e1712
SH		 2154 start_priv = (struct dasd_eckd_private *) startdev->private;
2155 base_priv = (struct dasd_eckd_private *) base->private;
2156
2157 rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize);
2158
2159 nr_tracks = fdata->stop_unit - fdata->start_unit + 1;
1da177e4
LT		 2160
2161 /*
2162 * fdata->intensity is a bit string that tells us what to do:
2163 * Bit 0: write record zero
2164 * Bit 1: write home address, currently not supported
2165 * Bit 2: invalidate tracks
2166 * Bit 3: use OS/390 compatible disk layout (cdl)
f9a28f7b 2167 * Bit 4: do not allow storage subsystem to modify record zero
1da177e4
LT		 2168 * Only some bit combinations do make sense.
2169 */
f9a28f7b
JBJ		 2170 if (fdata->intensity & 0x10) {
2171 r0_perm = 0;
2172 intensity = fdata->intensity & ~0x10;
2173 } else {
2174 r0_perm = 1;
2175 intensity = fdata->intensity;
2176 }
d42e1712 2177
18d6624e
SH		 2178 use_prefix = base_priv->features.feature[8] & 0x01;
2179
f9a28f7b 2180 switch (intensity) {
1da177e4
LT		 2181 case 0x00: /* Normal format */
2182 case 0x08: /* Normal format, use cdl. */
d42e1712 2183 cplength = 2 + (rpt*nr_tracks);
18d6624e
SH		 2184 if (use_prefix)
2185 datasize = sizeof(struct PFX_eckd_data) +
2186 sizeof(struct LO_eckd_data) +
2187 rpt * nr_tracks * sizeof(struct eckd_count);
2188 else
2189 datasize = sizeof(struct DE_eckd_data) +
2190 sizeof(struct LO_eckd_data) +
2191 rpt * nr_tracks * sizeof(struct eckd_count);
1da177e4
LT		 2192 break;
2193 case 0x01: /* Write record zero and format track. */
2194 case 0x09: /* Write record zero and format track, use cdl. */
d42e1712 2195 cplength = 2 + rpt * nr_tracks;
18d6624e
SH		 2196 if (use_prefix)
2197 datasize = sizeof(struct PFX_eckd_data) +
2198 sizeof(struct LO_eckd_data) +
2199 sizeof(struct eckd_count) +
2200 rpt * nr_tracks * sizeof(struct eckd_count);
2201 else
2202 datasize = sizeof(struct DE_eckd_data) +
2203 sizeof(struct LO_eckd_data) +
2204 sizeof(struct eckd_count) +
2205 rpt * nr_tracks * sizeof(struct eckd_count);
1da177e4
LT		 2206 break;
2207 case 0x04: /* Invalidate track. */
2208 case 0x0c: /* Invalidate track, use cdl. */
2209 cplength = 3;
18d6624e
SH		 2210 if (use_prefix)
2211 datasize = sizeof(struct PFX_eckd_data) +
2212 sizeof(struct LO_eckd_data) +
2213 sizeof(struct eckd_count);
2214 else
2215 datasize = sizeof(struct DE_eckd_data) +
2216 sizeof(struct LO_eckd_data) +
2217 sizeof(struct eckd_count);
1da177e4
LT		 2218 break;
2219 default:
d42e1712
SH		 2220 dev_warn(&startdev->cdev->dev,
2221 "An I/O control call used incorrect flags 0x%x\n",
2222 fdata->intensity);
1da177e4
LT		 2223 return ERR_PTR(-EINVAL);
2224 }
2225 /* Allocate the format ccw request. */
d42e1712
SH		 2226 fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength,
2227 datasize, startdev);
1da177e4
LT		 2228 if (IS_ERR(fcp))
2229 return fcp;
2230
d42e1712 2231 start_priv->count++;
1da177e4
LT		 2232 data = fcp->data;
2233 ccw = fcp->cpaddr;
2234
f9a28f7b 2235 switch (intensity & ~0x08) {
1da177e4 2236 case 0x00: /* Normal format. */
18d6624e
SH		 2237 if (use_prefix) {
2238 prefix(ccw++, (struct PFX_eckd_data *) data,
2239 fdata->start_unit, fdata->stop_unit,
2240 DASD_ECKD_CCW_WRITE_CKD, base, startdev);
2241 /* grant subsystem permission to format R0 */
2242 if (r0_perm)
2243 ((struct PFX_eckd_data *)data)
2244 ->define_extent.ga_extended |= 0x04;
2245 data += sizeof(struct PFX_eckd_data);
2246 } else {
2247 define_extent(ccw++, (struct DE_eckd_data *) data,
2248 fdata->start_unit, fdata->stop_unit,
2249 DASD_ECKD_CCW_WRITE_CKD, startdev);
2250 /* grant subsystem permission to format R0 */
2251 if (r0_perm)
2252 ((struct DE_eckd_data *) data)
2253 ->ga_extended |= 0x04;
2254 data += sizeof(struct DE_eckd_data);
2255 }
1da177e4
LT		 2256 ccw[-1].flags |= CCW_FLAG_CC;
2257 locate_record(ccw++, (struct LO_eckd_data *) data,
d42e1712
SH		 2258 fdata->start_unit, 0, rpt*nr_tracks,
2259 DASD_ECKD_CCW_WRITE_CKD, base,
1da177e4
LT		 2260 fdata->blksize);
2261 data += sizeof(struct LO_eckd_data);
2262 break;
2263 case 0x01: /* Write record zero + format track. */
18d6624e
SH		 2264 if (use_prefix) {
2265 prefix(ccw++, (struct PFX_eckd_data *) data,
2266 fdata->start_unit, fdata->stop_unit,
2267 DASD_ECKD_CCW_WRITE_RECORD_ZERO,
2268 base, startdev);
2269 data += sizeof(struct PFX_eckd_data);
2270 } else {
2271 define_extent(ccw++, (struct DE_eckd_data *) data,
2272 fdata->start_unit, fdata->stop_unit,
2273 DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev);
2274 data += sizeof(struct DE_eckd_data);
2275 }
1da177e4
LT		 2276 ccw[-1].flags |= CCW_FLAG_CC;
2277 locate_record(ccw++, (struct LO_eckd_data *) data,
d42e1712
SH		 2278 fdata->start_unit, 0, rpt * nr_tracks + 1,
2279 DASD_ECKD_CCW_WRITE_RECORD_ZERO, base,
2280 base->block->bp_block);
1da177e4
LT		 2281 data += sizeof(struct LO_eckd_data);
2282 break;
2283 case 0x04: /* Invalidate track. */
18d6624e
SH		 2284 if (use_prefix) {
2285 prefix(ccw++, (struct PFX_eckd_data *) data,
2286 fdata->start_unit, fdata->stop_unit,
2287 DASD_ECKD_CCW_WRITE_CKD, base, startdev);
2288 data += sizeof(struct PFX_eckd_data);
2289 } else {
2290 define_extent(ccw++, (struct DE_eckd_data *) data,
2291 fdata->start_unit, fdata->stop_unit,
2292 DASD_ECKD_CCW_WRITE_CKD, startdev);
2293 data += sizeof(struct DE_eckd_data);
2294 }
1da177e4
LT		 2295 ccw[-1].flags |= CCW_FLAG_CC;
2296 locate_record(ccw++, (struct LO_eckd_data *) data,
2297 fdata->start_unit, 0, 1,
d42e1712 2298 DASD_ECKD_CCW_WRITE_CKD, base, 8);
1da177e4
LT		 2299 data += sizeof(struct LO_eckd_data);
2300 break;
2301 }
d42e1712
SH		 2302
2303 for (j = 0; j < nr_tracks; j++) {
2304 /* calculate cylinder and head for the current track */
2305 set_ch_t(&address,
2306 (fdata->start_unit + j) /
2307 base_priv->rdc_data.trk_per_cyl,
2308 (fdata->start_unit + j) %
2309 base_priv->rdc_data.trk_per_cyl);
2310 if (intensity & 0x01) { /* write record zero */
1da177e4
LT		 2311 ect = (struct eckd_count *) data;
2312 data += sizeof(struct eckd_count);
b44b0ab3
SW		 2313 ect->cyl = address.cyl;
2314 ect->head = address.head;
d42e1712 2315 ect->record = 0;
1da177e4 2316 ect->kl = 0;
d42e1712 2317 ect->dl = 8;
1da177e4 2318 ccw[-1].flags |= CCW_FLAG_CC;
d42e1712 2319 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO;
1da177e4
LT		 2320 ccw->flags = CCW_FLAG_SLI;
2321 ccw->count = 8;
2322 ccw->cda = (__u32)(addr_t) ect;
2323 ccw++;
2324 }
d42e1712
SH		 2325 if ((intensity & ~0x08) & 0x04) { /* erase track */
2326 ect = (struct eckd_count *) data;
2327 data += sizeof(struct eckd_count);
2328 ect->cyl = address.cyl;
2329 ect->head = address.head;
2330 ect->record = 1;
2331 ect->kl = 0;
2332 ect->dl = 0;
2333 ccw[-1].flags |= CCW_FLAG_CC;
2334 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
2335 ccw->flags = CCW_FLAG_SLI;
2336 ccw->count = 8;
2337 ccw->cda = (__u32)(addr_t) ect;
2338 } else { /* write remaining records */
2339 for (i = 0; i < rpt; i++) {
2340 ect = (struct eckd_count *) data;
2341 data += sizeof(struct eckd_count);
2342 ect->cyl = address.cyl;
2343 ect->head = address.head;
2344 ect->record = i + 1;
2345 ect->kl = 0;
2346 ect->dl = fdata->blksize;
2347 /*
2348 * Check for special tracks 0-1
2349 * when formatting CDL
2350 */
2351 if ((intensity & 0x08) &&
46d1c03c 2352 address.cyl == 0 && address.head == 0) {
d42e1712
SH		 2353 if (i < 3) {
2354 ect->kl = 4;
2355 ect->dl = sizes_trk0[i] - 4;
2356 }
2357 }
2358 if ((intensity & 0x08) &&
46d1c03c 2359 address.cyl == 0 && address.head == 1) {
d42e1712
SH		 2360 ect->kl = 44;
2361 ect->dl = LABEL_SIZE - 44;
2362 }
2363 ccw[-1].flags |= CCW_FLAG_CC;
2364 if (i != 0 || j == 0)
2365 ccw->cmd_code =
2366 DASD_ECKD_CCW_WRITE_CKD;
2367 else
2368 ccw->cmd_code =
2369 DASD_ECKD_CCW_WRITE_CKD_MT;
2370 ccw->flags = CCW_FLAG_SLI;
2371 ccw->count = 8;
2372 ccw->cda = (__u32)(addr_t) ect;
2373 ccw++;
2374 }
2375 }
1da177e4 2376 }
d42e1712
SH		 2377
2378 fcp->startdev = startdev;
2379 fcp->memdev = startdev;
29b8dd9d 2380 fcp->basedev = base;
eb6e199b 2381 fcp->retries = 256;
d42e1712 2382 fcp->expires = startdev->default_expires * HZ;
1aae0560 2383 fcp->buildclk = get_tod_clock();
1da177e4 2384 fcp->status = DASD_CQR_FILLED;
d42e1712 2385
1da177e4
LT		 2386 return fcp;
2387}
2388
570d237c
JH		 2389/*
2390 * Wrapper function to build a CCW request depending on input data
2391 */
2392static struct dasd_ccw_req *
2393dasd_eckd_format_build_ccw_req(struct dasd_device *base,
2394 struct format_data_t *fdata, int enable_pav)
2395{
2396 return dasd_eckd_build_format(base, fdata, enable_pav);
2397}
2398
2399/*
2400 * Sanity checks on format_data
2401 */
2402static int dasd_eckd_format_sanity_checks(struct dasd_device *base,
2403 struct format_data_t *fdata)
d42e1712 2404{
d42e1712 2405 struct dasd_eckd_private *private;
d42e1712 2406
d42e1712
SH		 2407 private = (struct dasd_eckd_private *) base->private;
2408
d42e1712
SH		 2409 if (fdata->start_unit >=
2410 (private->real_cyl * private->rdc_data.trk_per_cyl)) {
2411 dev_warn(&base->cdev->dev,
2412 "Start track number %u used in formatting is too big\n",
2413 fdata->start_unit);
2414 return -EINVAL;
2415 }
2416 if (fdata->stop_unit >=
2417 (private->real_cyl * private->rdc_data.trk_per_cyl)) {
2418 dev_warn(&base->cdev->dev,
2419 "Stop track number %u used in formatting is too big\n",
2420 fdata->stop_unit);
2421 return -EINVAL;
2422 }
2423 if (fdata->start_unit > fdata->stop_unit) {
2424 dev_warn(&base->cdev->dev,
2425 "Start track %u used in formatting exceeds end track\n",
2426 fdata->start_unit);
2427 return -EINVAL;
2428 }
2429 if (dasd_check_blocksize(fdata->blksize) != 0) {
2430 dev_warn(&base->cdev->dev,
2431 "The DASD cannot be formatted with block size %u\n",
2432 fdata->blksize);
2433 return -EINVAL;
2434 }
570d237c
JH		 2435 return 0;
2436}
2437
2438/*
2439 * This function will process format_data originally coming from an IOCTL
2440 */
2441static int dasd_eckd_format_process_data(struct dasd_device *base,
2442 struct format_data_t *fdata,
2443 int enable_pav)
2444{
2445 struct dasd_ccw_req *cqr, *n;
2446 struct dasd_eckd_private *private;
2447 struct list_head format_queue;
2448 struct dasd_device *device;
2449 int old_start, old_stop, format_step;
2450 int step, retry;
2451 int rc;
2452
2453 private = (struct dasd_eckd_private *) base->private;
2454
2455 rc = dasd_eckd_format_sanity_checks(base, fdata);
2456 if (rc)
2457 return rc;
d42e1712
SH		 2458
2459 INIT_LIST_HEAD(&format_queue);
d42e1712 2460
46d1c03c 2461 old_start = fdata->start_unit;
29b8dd9d 2462 old_stop = fdata->stop_unit;
d42e1712 2463
46d1c03c
JH		 2464 format_step = DASD_CQR_MAX_CCW / recs_per_track(&private->rdc_data, 0,
2465 fdata->blksize);
2466 do {
2467 retry = 0;
2468 while (fdata->start_unit <= old_stop) {
2469 step = fdata->stop_unit - fdata->start_unit + 1;
2470 if (step > format_step) {
2471 fdata->stop_unit =
2472 fdata->start_unit + format_step - 1;
2473 }
d42e1712 2474
570d237c
JH		 2475 cqr = dasd_eckd_format_build_ccw_req(base, fdata,
2476 enable_pav);
46d1c03c
JH		 2477 if (IS_ERR(cqr)) {
2478 rc = PTR_ERR(cqr);
2479 if (rc == -ENOMEM) {
2480 if (list_empty(&format_queue))
2481 goto out;
2482 /*
2483 * not enough memory available, start
2484 * requests retry after first requests
2485 * were finished
2486 */
2487 retry = 1;
2488 break;
2489 }
2490 goto out_err;
2491 }
2492 list_add_tail(&cqr->blocklist, &format_queue);
d42e1712 2493
46d1c03c
JH		 2494 fdata->start_unit = fdata->stop_unit + 1;
2495 fdata->stop_unit = old_stop;
d42e1712 2496 }
d42e1712 2497
46d1c03c
JH		 2498 rc = dasd_sleep_on_queue(&format_queue);
2499
2500out_err:
2501 list_for_each_entry_safe(cqr, n, &format_queue, blocklist) {
2502 device = cqr->startdev;
2503 private = (struct dasd_eckd_private *) device->private;
2504 if (cqr->status == DASD_CQR_FAILED)
2505 rc = -EIO;
2506 list_del_init(&cqr->blocklist);
2507 dasd_sfree_request(cqr, device);
2508 private->count--;
2509 }
d42e1712 2510
46d1c03c
JH		 2511 if (rc)
2512 goto out;
d42e1712 2513
46d1c03c 2514 } while (retry);
29b8dd9d 2515
46d1c03c
JH		 2516out:
2517 fdata->start_unit = old_start;
2518 fdata->stop_unit = old_stop;
d42e1712
SH		 2519
2520 return rc;
2521}
2522
570d237c
JH		 2523static int dasd_eckd_format_device(struct dasd_device *base,
2524 struct format_data_t *fdata, int enable_pav)
2525{
2526 return dasd_eckd_format_process_data(base, fdata, enable_pav);
2527}
2528
8e09f215 2529static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr)
1da177e4 2530{
a2ace466
HR		 2531 if (cqr->retries < 0) {
2532 cqr->status = DASD_CQR_FAILED;
2533 return;
2534 }
8e09f215
SW		 2535 cqr->status = DASD_CQR_FILLED;
2536 if (cqr->block && (cqr->startdev != cqr->block->base)) {
2537 dasd_eckd_reset_ccw_to_base_io(cqr);
2538 cqr->startdev = cqr->block->base;
a4d26c6a 2539 cqr->lpm = cqr->block->base->path_data.opm;
1da177e4 2540 }
8e09f215 2541};
1da177e4
LT		 2542
2543static dasd_erp_fn_t
2544dasd_eckd_erp_action(struct dasd_ccw_req * cqr)
2545{
8e09f215 2546 struct dasd_device *device = (struct dasd_device *) cqr->startdev;
1da177e4
LT		 2547 struct ccw_device *cdev = device->cdev;
2548
2549 switch (cdev->id.cu_type) {
2550 case 0x3990:
2551 case 0x2105:
2552 case 0x2107:
2553 case 0x1750:
2554 return dasd_3990_erp_action;
2555 case 0x9343:
2556 case 0x3880:
2557 default:
2558 return dasd_default_erp_action;
2559 }
2560}
2561
2562static dasd_erp_fn_t
2563dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr)
2564{
2565 return dasd_default_erp_postaction;
2566}
2567
5a27e60d
SW		 2568static void dasd_eckd_check_for_device_change(struct dasd_device *device,
2569 struct dasd_ccw_req *cqr,
2570 struct irb *irb)
8e09f215
SW		 2571{
2572 char mask;
f3eb5384 2573 char *sense = NULL;
501183f2 2574 struct dasd_eckd_private *private;
8e09f215 2575
501183f2 2576 private = (struct dasd_eckd_private *) device->private;
8e09f215
SW		 2577 /* first of all check for state change pending interrupt */
2578 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP;
f3eb5384 2579 if ((scsw_dstat(&irb->scsw) & mask) == mask) {
c8d1c0ff
SH		 2580 /*
2581 * for alias only, not in offline processing
2582 * and only if not suspended
2583 */
501183f2 2584 if (!device->block && private->lcu &&
25e2cf1c 2585 device->state == DASD_STATE_ONLINE &&
c8d1c0ff
SH		 2586 !test_bit(DASD_FLAG_OFFLINE, &device->flags) &&
2587 !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) {
501183f2
SH		 2588 /*
2589 * the state change could be caused by an alias
2590 * reassignment remove device from alias handling
2591 * to prevent new requests from being scheduled on
2592 * the wrong alias device
2593 */
2594 dasd_alias_remove_device(device);
2595
2596 /* schedule worker to reload device */
2597 dasd_reload_device(device);
2598 }
8e09f215
SW		 2599 dasd_generic_handle_state_change(device);
2600 return;
2601 }
2602
a5a0061f 2603 sense = dasd_get_sense(irb);
5a27e60d
SW		 2604 if (!sense)
2605 return;
2606
2607 /* summary unit check */
c7a29e56 2608 if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) &&
a5a0061f 2609 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) {
8e09f215
SW		 2610 dasd_alias_handle_summary_unit_check(device, irb);
2611 return;
2612 }
2613
f60c768c 2614 /* service information message SIM */
5a27e60d 2615 if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) &&
f3eb5384
SW		 2616 ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) {
2617 dasd_3990_erp_handle_sim(device, sense);
f60c768c
SH		 2618 return;
2619 }
2620
5a27e60d
SW		 2621 /* loss of device reservation is handled via base devices only
2622 * as alias devices may be used with several bases
2623 */
c7a29e56
SW		 2624 if (device->block && (sense[27] & DASD_SENSE_BIT_0) &&
2625 (sense[7] == 0x3F) &&
5a27e60d
SW		 2626 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) &&
2627 test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) {
2628 if (device->features & DASD_FEATURE_FAILONSLCK)
2629 set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags);
2630 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags);
2631 dev_err(&device->cdev->dev,
2632 "The device reservation was lost\n");
ada3df91 2633 }
5a27e60d 2634}
f3eb5384
SW		 2635
2636static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single(
2637 struct dasd_device *startdev,
8e09f215 2638 struct dasd_block *block,
f3eb5384
SW		 2639 struct request *req,
2640 sector_t first_rec,
2641 sector_t last_rec,
2642 sector_t first_trk,
2643 sector_t last_trk,
2644 unsigned int first_offs,
2645 unsigned int last_offs,
2646 unsigned int blk_per_trk,
2647 unsigned int blksize)
1da177e4
LT		 2648{
2649 struct dasd_eckd_private *private;
2650 unsigned long *idaws;
2651 struct LO_eckd_data *LO_data;
2652 struct dasd_ccw_req *cqr;
2653 struct ccw1 *ccw;
5705f702 2654 struct req_iterator iter;
7988613b 2655 struct bio_vec bv;
1da177e4 2656 char *dst;
f3eb5384 2657 unsigned int off;
1da177e4 2658 int count, cidaw, cplength, datasize;
f3eb5384 2659 sector_t recid;
1da177e4 2660 unsigned char cmd, rcmd;
8e09f215
SW		 2661 int use_prefix;
2662 struct dasd_device *basedev;
1da177e4 2663
8e09f215
SW		 2664 basedev = block->base;
2665 private = (struct dasd_eckd_private *) basedev->private;
1da177e4
LT		 2666 if (rq_data_dir(req) == READ)
2667 cmd = DASD_ECKD_CCW_READ_MT;
2668 else if (rq_data_dir(req) == WRITE)
2669 cmd = DASD_ECKD_CCW_WRITE_MT;
2670 else
2671 return ERR_PTR(-EINVAL);
f3eb5384 2672
1da177e4
LT		 2673 /* Check struct bio and count the number of blocks for the request. */
2674 count = 0;
2675 cidaw = 0;
5705f702 2676 rq_for_each_segment(bv, req, iter) {
7988613b 2677 if (bv.bv_len & (blksize - 1))
6c92e699
JA		 2678 /* Eckd can only do full blocks. */
2679 return ERR_PTR(-EINVAL);
7988613b 2680 count += bv.bv_len >> (block->s2b_shift + 9);
7988613b
KO		 2681 if (idal_is_needed (page_address(bv.bv_page), bv.bv_len))
2682 cidaw += bv.bv_len >> (block->s2b_shift + 9);
1da177e4
LT		 2683 }
2684 /* Paranoia. */
2685 if (count != last_rec - first_rec + 1)
2686 return ERR_PTR(-EINVAL);
8e09f215
SW		 2687
2688 /* use the prefix command if available */
2689 use_prefix = private->features.feature[8] & 0x01;
2690 if (use_prefix) {
2691 /* 1x prefix + number of blocks */
2692 cplength = 2 + count;
2693 /* 1x prefix + cidaws*sizeof(long) */
2694 datasize = sizeof(struct PFX_eckd_data) +
2695 sizeof(struct LO_eckd_data) +
2696 cidaw * sizeof(unsigned long);
2697 } else {
2698 /* 1x define extent + 1x locate record + number of blocks */
2699 cplength = 2 + count;
2700 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */
2701 datasize = sizeof(struct DE_eckd_data) +
2702 sizeof(struct LO_eckd_data) +
2703 cidaw * sizeof(unsigned long);
2704 }
1da177e4
LT		 2705 /* Find out the number of additional locate record ccws for cdl. */
2706 if (private->uses_cdl && first_rec < 2*blk_per_trk) {
2707 if (last_rec >= 2*blk_per_trk)
2708 count = 2*blk_per_trk - first_rec;
2709 cplength += count;
2710 datasize += count*sizeof(struct LO_eckd_data);
2711 }
2712 /* Allocate the ccw request. */
68b781fe
SH		 2713 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
2714 startdev);
1da177e4
LT		 2715 if (IS_ERR(cqr))
2716 return cqr;
2717 ccw = cqr->cpaddr;
8e09f215
SW		 2718 /* First ccw is define extent or prefix. */
2719 if (use_prefix) {
2720 if (prefix(ccw++, cqr->data, first_trk,
2721 last_trk, cmd, basedev, startdev) == -EAGAIN) {
2722 /* Clock not in sync and XRC is enabled.
2723 * Try again later.
2724 */
2725 dasd_sfree_request(cqr, startdev);
2726 return ERR_PTR(-EAGAIN);
2727 }
2728 idaws = (unsigned long *) (cqr->data +
2729 sizeof(struct PFX_eckd_data));
2730 } else {
2731 if (define_extent(ccw++, cqr->data, first_trk,
b38f27e8 2732 last_trk, cmd, basedev) == -EAGAIN) {
8e09f215
SW		 2733 /* Clock not in sync and XRC is enabled.
2734 * Try again later.
2735 */
2736 dasd_sfree_request(cqr, startdev);
2737 return ERR_PTR(-EAGAIN);
2738 }
2739 idaws = (unsigned long *) (cqr->data +
2740 sizeof(struct DE_eckd_data));
d54853ef 2741 }
1da177e4 2742 /* Build locate_record+read/write/ccws. */
1da177e4
LT		 2743 LO_data = (struct LO_eckd_data *) (idaws + cidaw);
2744 recid = first_rec;
2745 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) {
2746 /* Only standard blocks so there is just one locate record. */
2747 ccw[-1].flags |= CCW_FLAG_CC;
2748 locate_record(ccw++, LO_data++, first_trk, first_offs + 1,
8e09f215 2749 last_rec - recid + 1, cmd, basedev, blksize);
1da177e4 2750 }
5705f702 2751 rq_for_each_segment(bv, req, iter) {
7988613b 2752 dst = page_address(bv.bv_page) + bv.bv_offset;
1da177e4
LT		 2753 if (dasd_page_cache) {
2754 char *copy = kmem_cache_alloc(dasd_page_cache,
441e143e 2755 GFP_DMA | __GFP_NOWARN);
1da177e4 2756 if (copy && rq_data_dir(req) == WRITE)
7988613b 2757 memcpy(copy + bv.bv_offset, dst, bv.bv_len);
1da177e4 2758 if (copy)
7988613b 2759 dst = copy + bv.bv_offset;
1da177e4 2760 }
7988613b 2761 for (off = 0; off < bv.bv_len; off += blksize) {
1da177e4
LT		 2762 sector_t trkid = recid;
2763 unsigned int recoffs = sector_div(trkid, blk_per_trk);
2764 rcmd = cmd;
2765 count = blksize;
2766 /* Locate record for cdl special block ? */
2767 if (private->uses_cdl && recid < 2*blk_per_trk) {
2768 if (dasd_eckd_cdl_special(blk_per_trk, recid)){
2769 rcmd |= 0x8;
2770 count = dasd_eckd_cdl_reclen(recid);
ec5883ab
HH		 2771 if (count < blksize &&
2772 rq_data_dir(req) == READ)
1da177e4
LT		 2773 memset(dst + count, 0xe5,
2774 blksize - count);
2775 }
2776 ccw[-1].flags |= CCW_FLAG_CC;
2777 locate_record(ccw++, LO_data++,
2778 trkid, recoffs + 1,
8e09f215 2779 1, rcmd, basedev, count);
1da177e4
LT		 2780 }
2781 /* Locate record for standard blocks ? */
2782 if (private->uses_cdl && recid == 2*blk_per_trk) {
2783 ccw[-1].flags |= CCW_FLAG_CC;
2784 locate_record(ccw++, LO_data++,
2785 trkid, recoffs + 1,
2786 last_rec - recid + 1,
8e09f215 2787 cmd, basedev, count);
1da177e4
LT		 2788 }
2789 /* Read/write ccw. */
2790 ccw[-1].flags |= CCW_FLAG_CC;
2791 ccw->cmd_code = rcmd;
2792 ccw->count = count;
2793 if (idal_is_needed(dst, blksize)) {
2794 ccw->cda = (__u32)(addr_t) idaws;
2795 ccw->flags = CCW_FLAG_IDA;
2796 idaws = idal_create_words(idaws, dst, blksize);
2797 } else {
2798 ccw->cda = (__u32)(addr_t) dst;
2799 ccw->flags = 0;
2800 }
2801 ccw++;
2802 dst += blksize;
2803 recid++;
2804 }
2805 }
13de227b
HS		 2806 if (blk_noretry_request(req) ||
2807 block->base->features & DASD_FEATURE_FAILFAST)
1c01b8a5 2808 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
8e09f215
SW		 2809 cqr->startdev = startdev;
2810 cqr->memdev = startdev;
2811 cqr->block = block;
7c8faa86 2812 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
a4d26c6a 2813 cqr->lpm = startdev->path_data.ppm;
1f1ee9ad 2814 cqr->retries = startdev->default_retries;
1aae0560 2815 cqr->buildclk = get_tod_clock();
1da177e4
LT		 2816 cqr->status = DASD_CQR_FILLED;
2817 return cqr;
2818}
2819
f3eb5384
SW		 2820static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track(
2821 struct dasd_device *startdev,
2822 struct dasd_block *block,
2823 struct request *req,
2824 sector_t first_rec,
2825 sector_t last_rec,
2826 sector_t first_trk,
2827 sector_t last_trk,
2828 unsigned int first_offs,
2829 unsigned int last_offs,
2830 unsigned int blk_per_trk,
2831 unsigned int blksize)
2832{
f3eb5384
SW		 2833 unsigned long *idaws;
2834 struct dasd_ccw_req *cqr;
2835 struct ccw1 *ccw;
2836 struct req_iterator iter;
7988613b 2837 struct bio_vec bv;
f3eb5384
SW		 2838 char *dst, *idaw_dst;
2839 unsigned int cidaw, cplength, datasize;
2840 unsigned int tlf;
2841 sector_t recid;
2842 unsigned char cmd;
2843 struct dasd_device *basedev;
2844 unsigned int trkcount, count, count_to_trk_end;
2845 unsigned int idaw_len, seg_len, part_len, len_to_track_end;
2846 unsigned char new_track, end_idaw;
2847 sector_t trkid;
2848 unsigned int recoffs;
2849
2850 basedev = block->base;
f3eb5384
SW		 2851 if (rq_data_dir(req) == READ)
2852 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
2853 else if (rq_data_dir(req) == WRITE)
2854 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
2855 else
2856 return ERR_PTR(-EINVAL);
2857
2858 /* Track based I/O needs IDAWs for each page, and not just for
2859 * 64 bit addresses. We need additional idals for pages
2860 * that get filled from two tracks, so we use the number
2861 * of records as upper limit.
2862 */
2863 cidaw = last_rec - first_rec + 1;
2864 trkcount = last_trk - first_trk + 1;
2865
2866 /* 1x prefix + one read/write ccw per track */
2867 cplength = 1 + trkcount;
2868
2869 /* on 31-bit we need space for two 32 bit addresses per page
2870 * on 64-bit one 64 bit address
2871 */
2872 datasize = sizeof(struct PFX_eckd_data) +
2873 cidaw * sizeof(unsigned long long);
2874
2875 /* Allocate the ccw request. */
68b781fe
SH		 2876 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
2877 startdev);
f3eb5384
SW		 2878 if (IS_ERR(cqr))
2879 return cqr;
2880 ccw = cqr->cpaddr;
2881 /* transfer length factor: how many bytes to read from the last track */
2882 if (first_trk == last_trk)
2883 tlf = last_offs - first_offs + 1;
2884 else
2885 tlf = last_offs + 1;
2886 tlf *= blksize;
2887
2888 if (prefix_LRE(ccw++, cqr->data, first_trk,
2889 last_trk, cmd, basedev, startdev,
2890 1 /* format */, first_offs + 1,
2891 trkcount, blksize,
2892 tlf) == -EAGAIN) {
2893 /* Clock not in sync and XRC is enabled.
2894 * Try again later.
2895 */
2896 dasd_sfree_request(cqr, startdev);
2897 return ERR_PTR(-EAGAIN);
2898 }
2899
2900 /*
2901 * The translation of request into ccw programs must meet the
2902 * following conditions:
2903 * - all idaws but the first and the last must address full pages
2904 * (or 2K blocks on 31-bit)
2905 * - the scope of a ccw and it's idal ends with the track boundaries
2906 */
2907 idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data));
2908 recid = first_rec;
2909 new_track = 1;
2910 end_idaw = 0;
2911 len_to_track_end = 0;
246ccea1 2912 idaw_dst = NULL;
f3eb5384
SW		 2913 idaw_len = 0;
2914 rq_for_each_segment(bv, req, iter) {
7988613b
KO		 2915 dst = page_address(bv.bv_page) + bv.bv_offset;
2916 seg_len = bv.bv_len;
f3eb5384
SW		 2917 while (seg_len) {
2918 if (new_track) {
2919 trkid = recid;
2920 recoffs = sector_div(trkid, blk_per_trk);
2921 count_to_trk_end = blk_per_trk - recoffs;
2922 count = min((last_rec - recid + 1),
2923 (sector_t)count_to_trk_end);
2924 len_to_track_end = count * blksize;
2925 ccw[-1].flags |= CCW_FLAG_CC;
2926 ccw->cmd_code = cmd;
2927 ccw->count = len_to_track_end;
2928 ccw->cda = (__u32)(addr_t)idaws;
2929 ccw->flags = CCW_FLAG_IDA;
2930 ccw++;
2931 recid += count;
2932 new_track = 0;
52db45c3
SW		 2933 /* first idaw for a ccw may start anywhere */
2934 if (!idaw_dst)
2935 idaw_dst = dst;
f3eb5384 2936 }
52db45c3
SW		 2937 /* If we start a new idaw, we must make sure that it
2938 * starts on an IDA_BLOCK_SIZE boundary.
f3eb5384
SW		 2939 * If we continue an idaw, we must make sure that the
2940 * current segment begins where the so far accumulated
2941 * idaw ends
2942 */
52db45c3
SW		 2943 if (!idaw_dst) {
2944 if (__pa(dst) & (IDA_BLOCK_SIZE-1)) {
2945 dasd_sfree_request(cqr, startdev);
2946 return ERR_PTR(-ERANGE);
2947 } else
2948 idaw_dst = dst;
2949 }
f3eb5384
SW		 2950 if ((idaw_dst + idaw_len) != dst) {
2951 dasd_sfree_request(cqr, startdev);
2952 return ERR_PTR(-ERANGE);
2953 }
2954 part_len = min(seg_len, len_to_track_end);
2955 seg_len -= part_len;
2956 dst += part_len;
2957 idaw_len += part_len;
2958 len_to_track_end -= part_len;
2959 /* collected memory area ends on an IDA_BLOCK border,
2960 * -> create an idaw
2961 * idal_create_words will handle cases where idaw_len
2962 * is larger then IDA_BLOCK_SIZE
2963 */
2964 if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1)))
2965 end_idaw = 1;
2966 /* We also need to end the idaw at track end */
2967 if (!len_to_track_end) {
2968 new_track = 1;
2969 end_idaw = 1;
2970 }
2971 if (end_idaw) {
2972 idaws = idal_create_words(idaws, idaw_dst,
2973 idaw_len);
246ccea1 2974 idaw_dst = NULL;
f3eb5384
SW		 2975 idaw_len = 0;
2976 end_idaw = 0;
2977 }
2978 }
2979 }
2980
2981 if (blk_noretry_request(req) ||
2982 block->base->features & DASD_FEATURE_FAILFAST)
2983 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2984 cqr->startdev = startdev;
2985 cqr->memdev = startdev;
2986 cqr->block = block;
7c8faa86 2987 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
a4d26c6a 2988 cqr->lpm = startdev->path_data.ppm;
1f1ee9ad 2989 cqr->retries = startdev->default_retries;
1aae0560 2990 cqr->buildclk = get_tod_clock();
f3eb5384
SW		 2991 cqr->status = DASD_CQR_FILLED;
2992 return cqr;
2993}
2994
2995static int prepare_itcw(struct itcw *itcw,
2996 unsigned int trk, unsigned int totrk, int cmd,
2997 struct dasd_device *basedev,
2998 struct dasd_device *startdev,
2999 unsigned int rec_on_trk, int count,
3000 unsigned int blksize,
3001 unsigned int total_data_size,
3002 unsigned int tlf,
3003 unsigned int blk_per_trk)
3004{
3005 struct PFX_eckd_data pfxdata;
3006 struct dasd_eckd_private *basepriv, *startpriv;
3007 struct DE_eckd_data *dedata;
3008 struct LRE_eckd_data *lredata;
3009 struct dcw *dcw;
3010
3011 u32 begcyl, endcyl;
3012 u16 heads, beghead, endhead;
3013 u8 pfx_cmd;
3014
3015 int rc = 0;
3016 int sector = 0;
3017 int dn, d;
3018
3019
3020 /* setup prefix data */
3021 basepriv = (struct dasd_eckd_private *) basedev->private;
3022 startpriv = (struct dasd_eckd_private *) startdev->private;
3023 dedata = &pfxdata.define_extent;
3024 lredata = &pfxdata.locate_record;
3025
3026 memset(&pfxdata, 0, sizeof(pfxdata));
3027 pfxdata.format = 1; /* PFX with LRE */
3028 pfxdata.base_address = basepriv->ned->unit_addr;
3029 pfxdata.base_lss = basepriv->ned->ID;
3030 pfxdata.validity.define_extent = 1;
3031
3032 /* private uid is kept up to date, conf_data may be outdated */
3033 if (startpriv->uid.type != UA_BASE_DEVICE) {
3034 pfxdata.validity.verify_base = 1;
3035 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS)
3036 pfxdata.validity.hyper_pav = 1;
3037 }
3038
3039 switch (cmd) {
3040 case DASD_ECKD_CCW_READ_TRACK_DATA:
3041 dedata->mask.perm = 0x1;
3042 dedata->attributes.operation = basepriv->attrib.operation;
3043 dedata->blk_size = blksize;
3044 dedata->ga_extended |= 0x42;
3045 lredata->operation.orientation = 0x0;
3046 lredata->operation.operation = 0x0C;
3047 lredata->auxiliary.check_bytes = 0x01;
3048 pfx_cmd = DASD_ECKD_CCW_PFX_READ;
3049 break;
3050 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
3051 dedata->mask.perm = 0x02;
3052 dedata->attributes.operation = basepriv->attrib.operation;
3053 dedata->blk_size = blksize;
3054 rc = check_XRC_on_prefix(&pfxdata, basedev);
3055 dedata->ga_extended |= 0x42;
3056 lredata->operation.orientation = 0x0;
3057 lredata->operation.operation = 0x3F;
3058 lredata->extended_operation = 0x23;
3059 lredata->auxiliary.check_bytes = 0x2;
3060 pfx_cmd = DASD_ECKD_CCW_PFX;
3061 break;
3062 default:
3063 DBF_DEV_EVENT(DBF_ERR, basedev,
3064 "prepare itcw, unknown opcode 0x%x", cmd);
3065 BUG();
3066 break;
3067 }
3068 if (rc)
3069 return rc;
3070
3071 dedata->attributes.mode = 0x3; /* ECKD */
3072
3073 heads = basepriv->rdc_data.trk_per_cyl;
3074 begcyl = trk / heads;
3075 beghead = trk % heads;
3076 endcyl = totrk / heads;
3077 endhead = totrk % heads;
3078
3079 /* check for sequential prestage - enhance cylinder range */
3080 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE ||
3081 dedata->attributes.operation == DASD_SEQ_ACCESS) {
3082
3083 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl)
3084 endcyl += basepriv->attrib.nr_cyl;
3085 else
3086 endcyl = (basepriv->real_cyl - 1);
3087 }
3088
3089 set_ch_t(&dedata->beg_ext, begcyl, beghead);
3090 set_ch_t(&dedata->end_ext, endcyl, endhead);
3091
3092 dedata->ep_format = 0x20; /* records per track is valid */
3093 dedata->ep_rec_per_track = blk_per_trk;
3094
3095 if (rec_on_trk) {
3096 switch (basepriv->rdc_data.dev_type) {
3097 case 0x3390:
3098 dn = ceil_quot(blksize + 6, 232);
3099 d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34);
3100 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
3101 break;
3102 case 0x3380:
3103 d = 7 + ceil_quot(blksize + 12, 32);
3104 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
3105 break;
3106 }
3107 }
3108
3109 lredata->auxiliary.length_valid = 1;
3110 lredata->auxiliary.length_scope = 1;
3111 lredata->auxiliary.imbedded_ccw_valid = 1;
3112 lredata->length = tlf;
3113 lredata->imbedded_ccw = cmd;
3114 lredata->count = count;
3115 lredata->sector = sector;
3116 set_ch_t(&lredata->seek_addr, begcyl, beghead);
3117 lredata->search_arg.cyl = lredata->seek_addr.cyl;
3118 lredata->search_arg.head = lredata->seek_addr.head;
3119 lredata->search_arg.record = rec_on_trk;
3120
3121 dcw = itcw_add_dcw(itcw, pfx_cmd, 0,
3122 &pfxdata, sizeof(pfxdata), total_data_size);
82a7b955 3123 return PTR_RET(dcw);
f3eb5384
SW		 3124}
3125
3126static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track(
3127 struct dasd_device *startdev,
3128 struct dasd_block *block,
3129 struct request *req,
3130 sector_t first_rec,
3131 sector_t last_rec,
3132 sector_t first_trk,
3133 sector_t last_trk,
3134 unsigned int first_offs,
3135 unsigned int last_offs,
3136 unsigned int blk_per_trk,
3137 unsigned int blksize)
3138{
f3eb5384
SW		 3139 struct dasd_ccw_req *cqr;
3140 struct req_iterator iter;
7988613b 3141 struct bio_vec bv;
f3eb5384
SW		 3142 char *dst;
3143 unsigned int trkcount, ctidaw;
3144 unsigned char cmd;
3145 struct dasd_device *basedev;
3146 unsigned int tlf;
3147 struct itcw *itcw;
3148 struct tidaw *last_tidaw = NULL;
3149 int itcw_op;
3150 size_t itcw_size;
ef19298b
SW		 3151 u8 tidaw_flags;
3152 unsigned int seg_len, part_len, len_to_track_end;
3153 unsigned char new_track;
3154 sector_t recid, trkid;
3155 unsigned int offs;
3156 unsigned int count, count_to_trk_end;
cd10502b 3157 int ret;
f3eb5384
SW		 3158
3159 basedev = block->base;
f3eb5384
SW		 3160 if (rq_data_dir(req) == READ) {
3161 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
3162 itcw_op = ITCW_OP_READ;
3163 } else if (rq_data_dir(req) == WRITE) {
3164 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
3165 itcw_op = ITCW_OP_WRITE;
3166 } else
3167 return ERR_PTR(-EINVAL);
3168
3169 /* trackbased I/O needs address all memory via TIDAWs,
3170 * not just for 64 bit addresses. This allows us to map
3171 * each segment directly to one tidaw.
ef19298b
SW		 3172 * In the case of write requests, additional tidaws may
3173 * be needed when a segment crosses a track boundary.
f3eb5384
SW		 3174 */
3175 trkcount = last_trk - first_trk + 1;
3176 ctidaw = 0;
3177 rq_for_each_segment(bv, req, iter) {
3178 ++ctidaw;
3179 }
ef19298b
SW		 3180 if (rq_data_dir(req) == WRITE)
3181 ctidaw += (last_trk - first_trk);
f3eb5384
SW		 3182
3183 /* Allocate the ccw request. */
3184 itcw_size = itcw_calc_size(0, ctidaw, 0);
68b781fe 3185 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev);
f3eb5384
SW		 3186 if (IS_ERR(cqr))
3187 return cqr;
3188
f3eb5384
SW		 3189 /* transfer length factor: how many bytes to read from the last track */
3190 if (first_trk == last_trk)
3191 tlf = last_offs - first_offs + 1;
3192 else
3193 tlf = last_offs + 1;
3194 tlf *= blksize;
3195
3196 itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0);
ef19298b 3197 if (IS_ERR(itcw)) {
cd10502b
JL		 3198 ret = -EINVAL;
3199 goto out_error;
ef19298b 3200 }
f3eb5384 3201 cqr->cpaddr = itcw_get_tcw(itcw);
f3eb5384
SW		 3202 if (prepare_itcw(itcw, first_trk, last_trk,
3203 cmd, basedev, startdev,
3204 first_offs + 1,
3205 trkcount, blksize,
3206 (last_rec - first_rec + 1) * blksize,
3207 tlf, blk_per_trk) == -EAGAIN) {
3208 /* Clock not in sync and XRC is enabled.
3209 * Try again later.
3210 */
cd10502b
JL		 3211 ret = -EAGAIN;
3212 goto out_error;
f3eb5384 3213 }
d54cddb6 3214 len_to_track_end = 0;
f3eb5384
SW		 3215 /*
3216 * A tidaw can address 4k of memory, but must not cross page boundaries
3217 * We can let the block layer handle this by setting
3218 * blk_queue_segment_boundary to page boundaries and
3219 * blk_max_segment_size to page size when setting up the request queue.
ef19298b
SW		 3220 * For write requests, a TIDAW must not cross track boundaries, because
3221 * we have to set the CBC flag on the last tidaw for each track.
f3eb5384 3222 */
ef19298b
SW		 3223 if (rq_data_dir(req) == WRITE) {
3224 new_track = 1;
3225 recid = first_rec;
3226 rq_for_each_segment(bv, req, iter) {
7988613b
KO		 3227 dst = page_address(bv.bv_page) + bv.bv_offset;
3228 seg_len = bv.bv_len;
ef19298b
SW		 3229 while (seg_len) {
3230 if (new_track) {
3231 trkid = recid;
3232 offs = sector_div(trkid, blk_per_trk);
3233 count_to_trk_end = blk_per_trk - offs;
3234 count = min((last_rec - recid + 1),
3235 (sector_t)count_to_trk_end);
3236 len_to_track_end = count * blksize;
3237 recid += count;
3238 new_track = 0;
3239 }
3240 part_len = min(seg_len, len_to_track_end);
3241 seg_len -= part_len;
3242 len_to_track_end -= part_len;
3243 /* We need to end the tidaw at track end */
3244 if (!len_to_track_end) {
3245 new_track = 1;
3246 tidaw_flags = TIDAW_FLAGS_INSERT_CBC;
3247 } else
3248 tidaw_flags = 0;
3249 last_tidaw = itcw_add_tidaw(itcw, tidaw_flags,
3250 dst, part_len);
cd10502b
JL		 3251 if (IS_ERR(last_tidaw)) {
3252 ret = -EINVAL;
3253 goto out_error;
3254 }
ef19298b
SW		 3255 dst += part_len;
3256 }
3257 }
3258 } else {
3259 rq_for_each_segment(bv, req, iter) {
7988613b 3260 dst = page_address(bv.bv_page) + bv.bv_offset;
ef19298b 3261 last_tidaw = itcw_add_tidaw(itcw, 0x00,
7988613b 3262 dst, bv.bv_len);
cd10502b
JL		 3263 if (IS_ERR(last_tidaw)) {
3264 ret = -EINVAL;
3265 goto out_error;
3266 }
ef19298b 3267 }
f3eb5384 3268 }
ef19298b
SW		 3269 last_tidaw->flags |= TIDAW_FLAGS_LAST;
3270 last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC;
f3eb5384
SW		 3271 itcw_finalize(itcw);
3272
3273 if (blk_noretry_request(req) ||
3274 block->base->features & DASD_FEATURE_FAILFAST)
3275 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
ef19298b 3276 cqr->cpmode = 1;
f3eb5384
SW		 3277 cqr->startdev = startdev;
3278 cqr->memdev = startdev;
3279 cqr->block = block;
7c8faa86 3280 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
a4d26c6a 3281 cqr->lpm = startdev->path_data.ppm;
1f1ee9ad 3282 cqr->retries = startdev->default_retries;
1aae0560 3283 cqr->buildclk = get_tod_clock();
f3eb5384
SW		 3284 cqr->status = DASD_CQR_FILLED;
3285 return cqr;
cd10502b
JL		 3286out_error:
3287 dasd_sfree_request(cqr, startdev);
3288 return ERR_PTR(ret);
f3eb5384
SW		 3289}
3290
3291static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev,
3292 struct dasd_block *block,
3293 struct request *req)
3294{
ef19298b 3295 int cmdrtd, cmdwtd;
f3eb5384 3296 int use_prefix;
ef19298b 3297 int fcx_multitrack;
45b44d76 3298 struct dasd_eckd_private *private;
f3eb5384
SW		 3299 struct dasd_device *basedev;
3300 sector_t first_rec, last_rec;
3301 sector_t first_trk, last_trk;
3302 unsigned int first_offs, last_offs;
3303 unsigned int blk_per_trk, blksize;
3304 int cdlspecial;
ef19298b 3305 unsigned int data_size;
f3eb5384
SW		 3306 struct dasd_ccw_req *cqr;
3307
3308 basedev = block->base;
3309 private = (struct dasd_eckd_private *) basedev->private;
3310
3311 /* Calculate number of blocks/records per track. */
3312 blksize = block->bp_block;
3313 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
6fca97a9
SH		 3314 if (blk_per_trk == 0)
3315 return ERR_PTR(-EINVAL);
f3eb5384 3316 /* Calculate record id of first and last block. */
83096ebf 3317 first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift;
f3eb5384
SW		 3318 first_offs = sector_div(first_trk, blk_per_trk);
3319 last_rec = last_trk =
83096ebf 3320 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift;
f3eb5384
SW		 3321 last_offs = sector_div(last_trk, blk_per_trk);
3322 cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk);
3323
ef19298b
SW		 3324 fcx_multitrack = private->features.feature[40] & 0x20;
3325 data_size = blk_rq_bytes(req);
26a35f37
SW		 3326 if (data_size % blksize)
3327 return ERR_PTR(-EINVAL);
ef19298b
SW		 3328 /* tpm write request add CBC data on each track boundary */
3329 if (rq_data_dir(req) == WRITE)
3330 data_size += (last_trk - first_trk) * 4;
f3eb5384
SW		 3331
3332 /* is read track data and write track data in command mode supported? */
3333 cmdrtd = private->features.feature[9] & 0x20;
3334 cmdwtd = private->features.feature[12] & 0x40;
3335 use_prefix = private->features.feature[8] & 0x01;
3336
3337 cqr = NULL;
3338 if (cdlspecial || dasd_page_cache) {
3339 /* do nothing, just fall through to the cmd mode single case */
ef19298b
SW		 3340 } else if ((data_size <= private->fcx_max_data)
3341 && (fcx_multitrack || (first_trk == last_trk))) {
f3eb5384
SW		 3342 cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req,
3343 first_rec, last_rec,
3344 first_trk, last_trk,
3345 first_offs, last_offs,
3346 blk_per_trk, blksize);
ef19298b
SW		 3347 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) &&
3348 (PTR_ERR(cqr) != -ENOMEM))
f3eb5384
SW		 3349 cqr = NULL;
3350 } else if (use_prefix &&
3351 (((rq_data_dir(req) == READ) && cmdrtd) ||
3352 ((rq_data_dir(req) == WRITE) && cmdwtd))) {
3353 cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req,
3354 first_rec, last_rec,
3355 first_trk, last_trk,
3356 first_offs, last_offs,
3357 blk_per_trk, blksize);
ef19298b
SW		 3358 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) &&
3359 (PTR_ERR(cqr) != -ENOMEM))
f3eb5384
SW		 3360 cqr = NULL;
3361 }
3362 if (!cqr)
3363 cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req,
3364 first_rec, last_rec,
3365 first_trk, last_trk,
3366 first_offs, last_offs,
3367 blk_per_trk, blksize);
3368 return cqr;
3369}
3370
e4dbb0f2
SH		 3371static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev,
3372 struct dasd_block *block,
3373 struct request *req)
3374{
e4dbb0f2
SH		 3375 unsigned long *idaws;
3376 struct dasd_device *basedev;
3377 struct dasd_ccw_req *cqr;
3378 struct ccw1 *ccw;
3379 struct req_iterator iter;
7988613b 3380 struct bio_vec bv;
e4dbb0f2
SH		 3381 char *dst;
3382 unsigned char cmd;
3383 unsigned int trkcount;
3384 unsigned int seg_len, len_to_track_end;
3385 unsigned int first_offs;
3386 unsigned int cidaw, cplength, datasize;
558b9ef0
SW		 3387 sector_t first_trk, last_trk, sectors;
3388 sector_t start_padding_sectors, end_sector_offset, end_padding_sectors;
e4dbb0f2
SH		 3389 unsigned int pfx_datasize;
3390
3391 /*
3392 * raw track access needs to be mutiple of 64k and on 64k boundary
558b9ef0
SW		 3393 * For read requests we can fix an incorrect alignment by padding
3394 * the request with dummy pages.
e4dbb0f2 3395 */
558b9ef0
SW		 3396 start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK;
3397 end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) %
3398 DASD_RAW_SECTORS_PER_TRACK;
3399 end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) %
3400 DASD_RAW_SECTORS_PER_TRACK;
3401 basedev = block->base;
3402 if ((start_padding_sectors || end_padding_sectors) &&
3403 (rq_data_dir(req) == WRITE)) {
3404 DBF_DEV_EVENT(DBF_ERR, basedev,
3405 "raw write not track aligned (%lu,%lu) req %p",
3406 start_padding_sectors, end_padding_sectors, req);
e4dbb0f2
SH		 3407 cqr = ERR_PTR(-EINVAL);
3408 goto out;
3409 }
3410
3411 first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK;
3412 last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) /
3413 DASD_RAW_SECTORS_PER_TRACK;
3414 trkcount = last_trk - first_trk + 1;
3415 first_offs = 0;
e4dbb0f2
SH		 3416
3417 if (rq_data_dir(req) == READ)
3418 cmd = DASD_ECKD_CCW_READ_TRACK;
3419 else if (rq_data_dir(req) == WRITE)
3420 cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK;
3421 else {
3422 cqr = ERR_PTR(-EINVAL);
3423 goto out;
3424 }
3425
3426 /*
3427 * Raw track based I/O needs IDAWs for each page,
3428 * and not just for 64 bit addresses.
3429 */
3430 cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK;
3431
3432 /* 1x prefix + one read/write ccw per track */
3433 cplength = 1 + trkcount;
3434
3435 /*
3436 * struct PFX_eckd_data has up to 2 byte as extended parameter
3437 * this is needed for write full track and has to be mentioned
25985edc 3438 * separately
e4dbb0f2
SH		 3439 * add 8 instead of 2 to keep 8 byte boundary
3440 */
3441 pfx_datasize = sizeof(struct PFX_eckd_data) + 8;
3442
3443 datasize = pfx_datasize + cidaw * sizeof(unsigned long long);
3444
3445 /* Allocate the ccw request. */
3446 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength,
3447 datasize, startdev);
3448 if (IS_ERR(cqr))
3449 goto out;
3450 ccw = cqr->cpaddr;
3451
3452 if (prefix_LRE(ccw++, cqr->data, first_trk, last_trk, cmd,
3453 basedev, startdev, 1 /* format */, first_offs + 1,
3454 trkcount, 0, 0) == -EAGAIN) {
3455 /* Clock not in sync and XRC is enabled.
3456 * Try again later.
3457 */
3458 dasd_sfree_request(cqr, startdev);
3459 cqr = ERR_PTR(-EAGAIN);
3460 goto out;
3461 }
3462
3463 idaws = (unsigned long *)(cqr->data + pfx_datasize);
e4dbb0f2 3464 len_to_track_end = 0;
558b9ef0
SW		 3465 if (start_padding_sectors) {
3466 ccw[-1].flags |= CCW_FLAG_CC;
3467 ccw->cmd_code = cmd;
3468 /* maximum 3390 track size */
3469 ccw->count = 57326;
3470 /* 64k map to one track */
3471 len_to_track_end = 65536 - start_padding_sectors * 512;
3472 ccw->cda = (__u32)(addr_t)idaws;
3473 ccw->flags |= CCW_FLAG_IDA;
3474 ccw->flags |= CCW_FLAG_SLI;
3475 ccw++;
3476 for (sectors = 0; sectors < start_padding_sectors; sectors += 8)
3477 idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE);
3478 }
e4dbb0f2 3479 rq_for_each_segment(bv, req, iter) {
7988613b
KO		 3480 dst = page_address(bv.bv_page) + bv.bv_offset;
3481 seg_len = bv.bv_len;
558b9ef0
SW		 3482 if (cmd == DASD_ECKD_CCW_READ_TRACK)
3483 memset(dst, 0, seg_len);
e4dbb0f2
SH		 3484 if (!len_to_track_end) {
3485 ccw[-1].flags |= CCW_FLAG_CC;
3486 ccw->cmd_code = cmd;
3487 /* maximum 3390 track size */
3488 ccw->count = 57326;
3489 /* 64k map to one track */
3490 len_to_track_end = 65536;
3491 ccw->cda = (__u32)(addr_t)idaws;
3492 ccw->flags |= CCW_FLAG_IDA;
3493 ccw->flags |= CCW_FLAG_SLI;
3494 ccw++;
3495 }
3496 len_to_track_end -= seg_len;
3497 idaws = idal_create_words(idaws, dst, seg_len);
3498 }
558b9ef0
SW		 3499 for (sectors = 0; sectors < end_padding_sectors; sectors += 8)
3500 idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE);
e4dbb0f2
SH		 3501 if (blk_noretry_request(req) ||
3502 block->base->features & DASD_FEATURE_FAILFAST)
3503 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
3504 cqr->startdev = startdev;
3505 cqr->memdev = startdev;
3506 cqr->block = block;
3507 cqr->expires = startdev->default_expires * HZ;
3508 cqr->lpm = startdev->path_data.ppm;
1f1ee9ad 3509 cqr->retries = startdev->default_retries;
1aae0560 3510 cqr->buildclk = get_tod_clock();
e4dbb0f2
SH		 3511 cqr->status = DASD_CQR_FILLED;
3512
3513 if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN)
3514 cqr = NULL;
3515out:
3516 return cqr;
3517}
3518
3519
1da177e4
LT		 3520static int
3521dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req)
3522{
3523 struct dasd_eckd_private *private;
3524 struct ccw1 *ccw;
5705f702 3525 struct req_iterator iter;
7988613b 3526 struct bio_vec bv;
1da177e4
LT		 3527 char *dst, *cda;
3528 unsigned int blksize, blk_per_trk, off;
3529 sector_t recid;
5705f702 3530 int status;
1da177e4
LT		 3531
3532 if (!dasd_page_cache)
3533 goto out;
8e09f215
SW		 3534 private = (struct dasd_eckd_private *) cqr->block->base->private;
3535 blksize = cqr->block->bp_block;
1da177e4 3536 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
83096ebf 3537 recid = blk_rq_pos(req) >> cqr->block->s2b_shift;
1da177e4
LT		 3538 ccw = cqr->cpaddr;
3539 /* Skip over define extent & locate record. */
3540 ccw++;
3541 if (private->uses_cdl == 0 || recid > 2*blk_per_trk)
3542 ccw++;
5705f702 3543 rq_for_each_segment(bv, req, iter) {
7988613b
KO		 3544 dst = page_address(bv.bv_page) + bv.bv_offset;
3545 for (off = 0; off < bv.bv_len; off += blksize) {
1da177e4
LT		 3546 /* Skip locate record. */
3547 if (private->uses_cdl && recid <= 2*blk_per_trk)
3548 ccw++;
3549 if (dst) {
3550 if (ccw->flags & CCW_FLAG_IDA)
3551 cda = *((char **)((addr_t) ccw->cda));
3552 else
3553 cda = (char *)((addr_t) ccw->cda);
3554 if (dst != cda) {
3555 if (rq_data_dir(req) == READ)
7988613b 3556 memcpy(dst, cda, bv.bv_len);
1da177e4
LT		 3557 kmem_cache_free(dasd_page_cache,
3558 (void *)((addr_t)cda & PAGE_MASK));
3559 }
3560 dst = NULL;
3561 }
3562 ccw++;
3563 recid++;
3564 }
3565 }
3566out:
3567 status = cqr->status == DASD_CQR_DONE;
8e09f215 3568 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 3569 return status;
3570}
3571
8e09f215 3572/*
f3eb5384 3573 * Modify ccw/tcw in cqr so it can be started on a base device.
8e09f215
SW		 3574 *
3575 * Note that this is not enough to restart the cqr!
3576 * Either reset cqr->startdev as well (summary unit check handling)
3577 * or restart via separate cqr (as in ERP handling).
3578 */
3579void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr)
3580{
3581 struct ccw1 *ccw;
3582 struct PFX_eckd_data *pfxdata;
f3eb5384
SW		 3583 struct tcw *tcw;
3584 struct tccb *tccb;
3585 struct dcw *dcw;
3586
3587 if (cqr->cpmode == 1) {
3588 tcw = cqr->cpaddr;
3589 tccb = tcw_get_tccb(tcw);
3590 dcw = (struct dcw *)&tccb->tca[0];
3591 pfxdata = (struct PFX_eckd_data *)&dcw->cd[0];
8e09f215
SW		 3592 pfxdata->validity.verify_base = 0;
3593 pfxdata->validity.hyper_pav = 0;
f3eb5384
SW		 3594 } else {
3595 ccw = cqr->cpaddr;
3596 pfxdata = cqr->data;
3597 if (ccw->cmd_code == DASD_ECKD_CCW_PFX) {
3598 pfxdata->validity.verify_base = 0;
3599 pfxdata->validity.hyper_pav = 0;
3600 }
8e09f215
SW		 3601 }
3602}
3603
3604#define DASD_ECKD_CHANQ_MAX_SIZE 4
3605
3606static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base,
3607 struct dasd_block *block,
3608 struct request *req)
3609{
3610 struct dasd_eckd_private *private;
3611 struct dasd_device *startdev;
3612 unsigned long flags;
3613 struct dasd_ccw_req *cqr;
3614
3615 startdev = dasd_alias_get_start_dev(base);
3616 if (!startdev)
3617 startdev = base;
3618 private = (struct dasd_eckd_private *) startdev->private;
3619 if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE)
3620 return ERR_PTR(-EBUSY);
3621
3622 spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags);
3623 private->count++;
e4dbb0f2
SH		 3624 if ((base->features & DASD_FEATURE_USERAW))
3625 cqr = dasd_raw_build_cp(startdev, block, req);
3626 else
3627 cqr = dasd_eckd_build_cp(startdev, block, req);
8e09f215
SW		 3628 if (IS_ERR(cqr))
3629 private->count--;
3630 spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags);
3631 return cqr;
3632}
3633
3634static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr,
3635 struct request *req)
3636{
3637 struct dasd_eckd_private *private;
3638 unsigned long flags;
3639
3640 spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags);
3641 private = (struct dasd_eckd_private *) cqr->memdev->private;
3642 private->count--;
3643 spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags);
3644 return dasd_eckd_free_cp(cqr, req);
3645}
3646
1da177e4
LT		 3647static int
3648dasd_eckd_fill_info(struct dasd_device * device,
3649 struct dasd_information2_t * info)
3650{
3651 struct dasd_eckd_private *private;
3652
3653 private = (struct dasd_eckd_private *) device->private;
3654 info->label_block = 2;
3655 info->FBA_layout = private->uses_cdl ? 0 : 1;
3656 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL;
3657 info->characteristics_size = sizeof(struct dasd_eckd_characteristics);
3658 memcpy(info->characteristics, &private->rdc_data,
3659 sizeof(struct dasd_eckd_characteristics));
4abb08c2
SW		 3660 info->confdata_size = min((unsigned long)private->conf_len,
3661 sizeof(info->configuration_data));
3662 memcpy(info->configuration_data, private->conf_data,
3663 info->confdata_size);
1da177e4
LT		 3664 return 0;
3665}
3666
3667/*
3668 * SECTION: ioctl functions for eckd devices.
3669 */
3670
3671/*
3672 * Release device ioctl.
138c014d 3673 * Buils a channel programm to releases a prior reserved
1da177e4
LT		 3674 * (see dasd_eckd_reserve) device.
3675 */
3676static int
1107ccfb 3677dasd_eckd_release(struct dasd_device *device)
1da177e4 3678{
1da177e4
LT		 3679 struct dasd_ccw_req *cqr;
3680 int rc;
f3eb5384 3681 struct ccw1 *ccw;
f932bcea 3682 int useglobal;
1da177e4
LT		 3683
3684 if (!capable(CAP_SYS_ADMIN))
3685 return -EACCES;
3686
f932bcea 3687 useglobal = 0;
68b781fe 3688 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
1da177e4 3689 if (IS_ERR(cqr)) {
f932bcea
SW		 3690 mutex_lock(&dasd_reserve_mutex);
3691 useglobal = 1;
3692 cqr = &dasd_reserve_req->cqr;
3693 memset(cqr, 0, sizeof(*cqr));
3694 memset(&dasd_reserve_req->ccw, 0,
3695 sizeof(dasd_reserve_req->ccw));
3696 cqr->cpaddr = &dasd_reserve_req->ccw;
3697 cqr->data = &dasd_reserve_req->data;
3698 cqr->magic = DASD_ECKD_MAGIC;
1da177e4 3699 }
f3eb5384
SW		 3700 ccw = cqr->cpaddr;
3701 ccw->cmd_code = DASD_ECKD_CCW_RELEASE;
3702 ccw->flags |= CCW_FLAG_SLI;
3703 ccw->count = 32;
3704 ccw->cda = (__u32)(addr_t) cqr->data;
8e09f215
SW		 3705 cqr->startdev = device;
3706 cqr->memdev = device;
1da177e4 3707 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 3708 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
336c340b 3709 cqr->retries = 2; /* set retry counter to enable basic ERP */
1da177e4 3710 cqr->expires = 2 * HZ;
1aae0560 3711 cqr->buildclk = get_tod_clock();
1da177e4
LT		 3712 cqr->status = DASD_CQR_FILLED;
3713
3714 rc = dasd_sleep_on_immediatly(cqr);
5a27e60d
SW		 3715 if (!rc)
3716 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags);
1da177e4 3717
f932bcea
SW		 3718 if (useglobal)
3719 mutex_unlock(&dasd_reserve_mutex);
3720 else
3721 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 3722 return rc;
3723}
3724
3725/*
3726 * Reserve device ioctl.
3727 * Options are set to 'synchronous wait for interrupt' and
138c014d
HH		 3728 * 'timeout the request'. This leads to a terminate IO if
3729 * the interrupt is outstanding for a certain time.
1da177e4
LT		 3730 */
3731static int
1107ccfb 3732dasd_eckd_reserve(struct dasd_device *device)
1da177e4 3733{
1da177e4
LT		 3734 struct dasd_ccw_req *cqr;
3735 int rc;
f3eb5384 3736 struct ccw1 *ccw;
f932bcea 3737 int useglobal;
1da177e4
LT		 3738
3739 if (!capable(CAP_SYS_ADMIN))
3740 return -EACCES;
3741
f932bcea 3742 useglobal = 0;
68b781fe 3743 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
1da177e4 3744 if (IS_ERR(cqr)) {
f932bcea
SW		 3745 mutex_lock(&dasd_reserve_mutex);
3746 useglobal = 1;
3747 cqr = &dasd_reserve_req->cqr;
3748 memset(cqr, 0, sizeof(*cqr));
3749 memset(&dasd_reserve_req->ccw, 0,
3750 sizeof(dasd_reserve_req->ccw));
3751 cqr->cpaddr = &dasd_reserve_req->ccw;
3752 cqr->data = &dasd_reserve_req->data;
3753 cqr->magic = DASD_ECKD_MAGIC;
1da177e4 3754 }
f3eb5384
SW		 3755 ccw = cqr->cpaddr;
3756 ccw->cmd_code = DASD_ECKD_CCW_RESERVE;
3757 ccw->flags |= CCW_FLAG_SLI;
3758 ccw->count = 32;
3759 ccw->cda = (__u32)(addr_t) cqr->data;
8e09f215
SW		 3760 cqr->startdev = device;
3761 cqr->memdev = device;
1da177e4 3762 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 3763 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
336c340b 3764 cqr->retries = 2; /* set retry counter to enable basic ERP */
1da177e4 3765 cqr->expires = 2 * HZ;
1aae0560 3766 cqr->buildclk = get_tod_clock();
1da177e4
LT		 3767 cqr->status = DASD_CQR_FILLED;
3768
3769 rc = dasd_sleep_on_immediatly(cqr);
5a27e60d
SW		 3770 if (!rc)
3771 set_bit(DASD_FLAG_IS_RESERVED, &device->flags);
1da177e4 3772
f932bcea
SW		 3773 if (useglobal)
3774 mutex_unlock(&dasd_reserve_mutex);
3775 else
3776 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 3777 return rc;
3778}
3779
3780/*
3781 * Steal lock ioctl - unconditional reserve device.
138c014d 3782 * Buils a channel programm to break a device's reservation.
1da177e4
LT		 3783 * (unconditional reserve)
3784 */
3785static int
1107ccfb 3786dasd_eckd_steal_lock(struct dasd_device *device)
1da177e4 3787{
1da177e4
LT		 3788 struct dasd_ccw_req *cqr;
3789 int rc;
f3eb5384 3790 struct ccw1 *ccw;
f932bcea 3791 int useglobal;
1da177e4
LT		 3792
3793 if (!capable(CAP_SYS_ADMIN))
3794 return -EACCES;
3795
f932bcea 3796 useglobal = 0;
68b781fe 3797 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
1da177e4 3798 if (IS_ERR(cqr)) {
f932bcea
SW		 3799 mutex_lock(&dasd_reserve_mutex);
3800 useglobal = 1;
3801 cqr = &dasd_reserve_req->cqr;
3802 memset(cqr, 0, sizeof(*cqr));
3803 memset(&dasd_reserve_req->ccw, 0,
3804 sizeof(dasd_reserve_req->ccw));
3805 cqr->cpaddr = &dasd_reserve_req->ccw;
3806 cqr->data = &dasd_reserve_req->data;
3807 cqr->magic = DASD_ECKD_MAGIC;
1da177e4 3808 }
f3eb5384
SW		 3809 ccw = cqr->cpaddr;
3810 ccw->cmd_code = DASD_ECKD_CCW_SLCK;
3811 ccw->flags |= CCW_FLAG_SLI;
3812 ccw->count = 32;
3813 ccw->cda = (__u32)(addr_t) cqr->data;
8e09f215
SW		 3814 cqr->startdev = device;
3815 cqr->memdev = device;
1da177e4 3816 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 3817 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
336c340b 3818 cqr->retries = 2; /* set retry counter to enable basic ERP */
1da177e4 3819 cqr->expires = 2 * HZ;
1aae0560 3820 cqr->buildclk = get_tod_clock();
1da177e4
LT		 3821 cqr->status = DASD_CQR_FILLED;
3822
3823 rc = dasd_sleep_on_immediatly(cqr);
5a27e60d
SW		 3824 if (!rc)
3825 set_bit(DASD_FLAG_IS_RESERVED, &device->flags);
1da177e4 3826
f932bcea
SW		 3827 if (useglobal)
3828 mutex_unlock(&dasd_reserve_mutex);
3829 else
3830 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 3831 return rc;
3832}
3833
196339f1
SW		 3834/*
3835 * SNID - Sense Path Group ID
3836 * This ioctl may be used in situations where I/O is stalled due to
3837 * a reserve, so if the normal dasd_smalloc_request fails, we use the
3838 * preallocated dasd_reserve_req.
3839 */
3840static int dasd_eckd_snid(struct dasd_device *device,
3841 void __user *argp)
3842{
3843 struct dasd_ccw_req *cqr;
3844 int rc;
3845 struct ccw1 *ccw;
3846 int useglobal;
3847 struct dasd_snid_ioctl_data usrparm;
3848
3849 if (!capable(CAP_SYS_ADMIN))
3850 return -EACCES;
3851
3852 if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
3853 return -EFAULT;
3854
3855 useglobal = 0;
3856 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1,
3857 sizeof(struct dasd_snid_data), device);
3858 if (IS_ERR(cqr)) {
3859 mutex_lock(&dasd_reserve_mutex);
3860 useglobal = 1;
3861 cqr = &dasd_reserve_req->cqr;
3862 memset(cqr, 0, sizeof(*cqr));
3863 memset(&dasd_reserve_req->ccw, 0,
3864 sizeof(dasd_reserve_req->ccw));
3865 cqr->cpaddr = &dasd_reserve_req->ccw;
3866 cqr->data = &dasd_reserve_req->data;
3867 cqr->magic = DASD_ECKD_MAGIC;
3868 }
3869 ccw = cqr->cpaddr;
3870 ccw->cmd_code = DASD_ECKD_CCW_SNID;
3871 ccw->flags |= CCW_FLAG_SLI;
3872 ccw->count = 12;
3873 ccw->cda = (__u32)(addr_t) cqr->data;
3874 cqr->startdev = device;
3875 cqr->memdev = device;
3876 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
3877 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
5a27e60d 3878 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags);
196339f1
SW		 3879 cqr->retries = 5;
3880 cqr->expires = 10 * HZ;
1aae0560 3881 cqr->buildclk = get_tod_clock();
196339f1
SW		 3882 cqr->status = DASD_CQR_FILLED;
3883 cqr->lpm = usrparm.path_mask;
3884
3885 rc = dasd_sleep_on_immediatly(cqr);
3886 /* verify that I/O processing didn't modify the path mask */
3887 if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask))
3888 rc = -EIO;
3889 if (!rc) {
3890 usrparm.data = *((struct dasd_snid_data *)cqr->data);
3891 if (copy_to_user(argp, &usrparm, sizeof(usrparm)))
3892 rc = -EFAULT;
3893 }
3894
3895 if (useglobal)
3896 mutex_unlock(&dasd_reserve_mutex);
3897 else
3898 dasd_sfree_request(cqr, cqr->memdev);
3899 return rc;
3900}
3901
1da177e4
LT		 3902/*
3903 * Read performance statistics
3904 */
3905static int
1107ccfb 3906dasd_eckd_performance(struct dasd_device *device, void __user *argp)
1da177e4 3907{
1da177e4
LT		 3908 struct dasd_psf_prssd_data *prssdp;
3909 struct dasd_rssd_perf_stats_t *stats;
3910 struct dasd_ccw_req *cqr;
3911 struct ccw1 *ccw;
3912 int rc;
3913
68b781fe 3914 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
8e09f215
SW		 3915 (sizeof(struct dasd_psf_prssd_data) +
3916 sizeof(struct dasd_rssd_perf_stats_t)),
1da177e4
LT		 3917 device);
3918 if (IS_ERR(cqr)) {
fc19f381 3919 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 3920 "Could not allocate initialization request");
3921 return PTR_ERR(cqr);
3922 }
8e09f215
SW		 3923 cqr->startdev = device;
3924 cqr->memdev = device;
1da177e4 3925 cqr->retries = 0;
eb6e199b 3926 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1da177e4
LT		 3927 cqr->expires = 10 * HZ;
3928
3929 /* Prepare for Read Subsystem Data */
3930 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
8e09f215 3931 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
1da177e4 3932 prssdp->order = PSF_ORDER_PRSSD;
5d67d164 3933 prssdp->suborder = 0x01; /* Performance Statistics */
1da177e4
LT		 3934 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */
3935
3936 ccw = cqr->cpaddr;
3937 ccw->cmd_code = DASD_ECKD_CCW_PSF;
8e09f215 3938 ccw->count = sizeof(struct dasd_psf_prssd_data);
1da177e4
LT		 3939 ccw->flags |= CCW_FLAG_CC;
3940 ccw->cda = (__u32)(addr_t) prssdp;
3941
3942 /* Read Subsystem Data - Performance Statistics */
3943 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
8e09f215 3944 memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t));
1da177e4
LT		 3945
3946 ccw++;
3947 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
8e09f215 3948 ccw->count = sizeof(struct dasd_rssd_perf_stats_t);
1da177e4
LT		 3949 ccw->cda = (__u32)(addr_t) stats;
3950
1aae0560 3951 cqr->buildclk = get_tod_clock();
1da177e4
LT		 3952 cqr->status = DASD_CQR_FILLED;
3953 rc = dasd_sleep_on(cqr);
3954 if (rc == 0) {
1da177e4
LT		 3955 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
3956 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
1107ccfb
CH		 3957 if (copy_to_user(argp, stats,
3958 sizeof(struct dasd_rssd_perf_stats_t)))
3959 rc = -EFAULT;
1da177e4 3960 }
8e09f215 3961 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 3962 return rc;
3963}
3964
3965/*
3966 * Get attributes (cache operations)
3967 * Returnes the cache attributes used in Define Extend (DE).
3968 */
3969static int
1107ccfb 3970dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp)
1da177e4 3971{
1107ccfb
CH		 3972 struct dasd_eckd_private *private =
3973 (struct dasd_eckd_private *)device->private;
3974 struct attrib_data_t attrib = private->attrib;
1da177e4
LT		 3975 int rc;
3976
3977 if (!capable(CAP_SYS_ADMIN))
3978 return -EACCES;
1107ccfb 3979 if (!argp)
1da177e4
LT		 3980 return -EINVAL;
3981
1107ccfb
CH		 3982 rc = 0;
3983 if (copy_to_user(argp, (long *) &attrib,
8e09f215 3984 sizeof(struct attrib_data_t)))
1107ccfb 3985 rc = -EFAULT;
1da177e4
LT		 3986
3987 return rc;
3988}
3989
3990/*
3991 * Set attributes (cache operations)
3992 * Stores the attributes for cache operation to be used in Define Extend (DE).
3993 */
3994static int
1107ccfb 3995dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp)
1da177e4 3996{
1107ccfb
CH		 3997 struct dasd_eckd_private *private =
3998 (struct dasd_eckd_private *)device->private;
1da177e4
LT		 3999 struct attrib_data_t attrib;
4000
4001 if (!capable(CAP_SYS_ADMIN))
4002 return -EACCES;
1107ccfb 4003 if (!argp)
1da177e4
LT		 4004 return -EINVAL;
4005
1107ccfb 4006 if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t)))
1da177e4 4007 return -EFAULT;
1da177e4
LT		 4008 private->attrib = attrib;
4009
fc19f381
SH		 4010 dev_info(&device->cdev->dev,
4011 "The DASD cache mode was set to %x (%i cylinder prestage)\n",
4012 private->attrib.operation, private->attrib.nr_cyl);
1da177e4
LT		 4013 return 0;
4014}
4015
ab1d848f
NH		 4016/*
4017 * Issue syscall I/O to EMC Symmetrix array.
4018 * CCWs are PSF and RSSD
4019 */
4020static int dasd_symm_io(struct dasd_device *device, void __user *argp)
4021{
4022 struct dasd_symmio_parms usrparm;
4023 char *psf_data, *rssd_result;
4024 struct dasd_ccw_req *cqr;
4025 struct ccw1 *ccw;
52898025 4026 char psf0, psf1;
ab1d848f
NH		 4027 int rc;
4028
52898025
NH		 4029 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
4030 return -EACCES;
4031 psf0 = psf1 = 0;
4032
ab1d848f
NH		 4033 /* Copy parms from caller */
4034 rc = -EFAULT;
4035 if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
4036 goto out;
92d62891 4037 if (is_compat_task()) {
f8b06859 4038 /* Make sure pointers are sane even on 31 bit. */
ab1d848f 4039 rc = -EINVAL;
f8b06859
HC		 4040 if ((usrparm.psf_data >> 32) != 0)
4041 goto out;
4042 if ((usrparm.rssd_result >> 32) != 0)
4043 goto out;
4044 usrparm.psf_data &= 0x7fffffffULL;
4045 usrparm.rssd_result &= 0x7fffffffULL;
ab1d848f 4046 }
ab1d848f
NH		 4047 /* alloc I/O data area */
4048 psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA);
4049 rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA);
4050 if (!psf_data || !rssd_result) {
4051 rc = -ENOMEM;
4052 goto out_free;
4053 }
4054
4055 /* get syscall header from user space */
4056 rc = -EFAULT;
4057 if (copy_from_user(psf_data,
4058 (void __user *)(unsigned long) usrparm.psf_data,
4059 usrparm.psf_data_len))
4060 goto out_free;
52898025
NH		 4061 psf0 = psf_data[0];
4062 psf1 = psf_data[1];
ab1d848f
NH		 4063
4064 /* setup CCWs for PSF + RSSD */
68b781fe 4065 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device);
ab1d848f 4066 if (IS_ERR(cqr)) {
fc19f381 4067 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
ab1d848f
NH		 4068 "Could not allocate initialization request");
4069 rc = PTR_ERR(cqr);
4070 goto out_free;
4071 }
4072
4073 cqr->startdev = device;
4074 cqr->memdev = device;
4075 cqr->retries = 3;
4076 cqr->expires = 10 * HZ;
1aae0560 4077 cqr->buildclk = get_tod_clock();
ab1d848f
NH		 4078 cqr->status = DASD_CQR_FILLED;
4079
4080 /* Build the ccws */
4081 ccw = cqr->cpaddr;
4082
4083 /* PSF ccw */
4084 ccw->cmd_code = DASD_ECKD_CCW_PSF;
4085 ccw->count = usrparm.psf_data_len;
4086 ccw->flags |= CCW_FLAG_CC;
4087 ccw->cda = (__u32)(addr_t) psf_data;
4088
4089 ccw++;
4090
4091 /* RSSD ccw */
4092 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
4093 ccw->count = usrparm.rssd_result_len;
4094 ccw->flags = CCW_FLAG_SLI ;
4095 ccw->cda = (__u32)(addr_t) rssd_result;
4096
4097 rc = dasd_sleep_on(cqr);
4098 if (rc)
4099 goto out_sfree;
4100
4101 rc = -EFAULT;
4102 if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result,
4103 rssd_result, usrparm.rssd_result_len))
4104 goto out_sfree;
4105 rc = 0;
4106
4107out_sfree:
4108 dasd_sfree_request(cqr, cqr->memdev);
4109out_free:
4110 kfree(rssd_result);
4111 kfree(psf_data);
4112out:
52898025
NH		 4113 DBF_DEV_EVENT(DBF_WARNING, device,
4114 "Symmetrix ioctl (0x%02x 0x%02x): rc=%d",
4115 (int) psf0, (int) psf1, rc);
ab1d848f
NH		 4116 return rc;
4117}
4118
1107ccfb 4119static int
8e09f215 4120dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp)
1107ccfb 4121{
8e09f215
SW		 4122 struct dasd_device *device = block->base;
4123
1107ccfb
CH		 4124 switch (cmd) {
4125 case BIODASDGATTR:
4126 return dasd_eckd_get_attrib(device, argp);
4127 case BIODASDSATTR:
4128 return dasd_eckd_set_attrib(device, argp);
4129 case BIODASDPSRD:
4130 return dasd_eckd_performance(device, argp);
4131 case BIODASDRLSE:
4132 return dasd_eckd_release(device);
4133 case BIODASDRSRV:
4134 return dasd_eckd_reserve(device);
4135 case BIODASDSLCK:
4136 return dasd_eckd_steal_lock(device);
196339f1
SW		 4137 case BIODASDSNID:
4138 return dasd_eckd_snid(device, argp);
ab1d848f
NH		 4139 case BIODASDSYMMIO:
4140 return dasd_symm_io(device, argp);
1107ccfb 4141 default:
6b79d14e 4142 return -ENOTTY;
1107ccfb
CH		 4143 }
4144}
4145
445b5b49
HH		 4146/*
4147 * Dump the range of CCWs into 'page' buffer
4148 * and return number of printed chars.
4149 */
4d284cac 4150static int
445b5b49
HH		 4151dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page)
4152{
4153 int len, count;
4154 char *datap;
4155
4156 len = 0;
4157 while (from <= to) {
773bab4a 4158 len += sprintf(page + len, PRINTK_HEADER
445b5b49
HH		 4159 " CCW %p: %08X %08X DAT:",
4160 from, ((int *) from)[0], ((int *) from)[1]);
4161
4162 /* get pointer to data (consider IDALs) */
4163 if (from->flags & CCW_FLAG_IDA)
4164 datap = (char *) *((addr_t *) (addr_t) from->cda);
4165 else
4166 datap = (char *) ((addr_t) from->cda);
4167
4168 /* dump data (max 32 bytes) */
4169 for (count = 0; count < from->count && count < 32; count++) {
4170 if (count % 8 == 0) len += sprintf(page + len, " ");
4171 if (count % 4 == 0) len += sprintf(page + len, " ");
4172 len += sprintf(page + len, "%02x", datap[count]);
4173 }
4174 len += sprintf(page + len, "\n");
4175 from++;
4176 }
4177 return len;
4178}
4179
fc19f381 4180static void
aeec92ca
SH		 4181dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb,
4182 char *reason)
fc19f381
SH		 4183{
4184 u64 *sense;
a5a0061f 4185 u64 *stat;
aeec92ca
SH		 4186
4187 sense = (u64 *) dasd_get_sense(irb);
a5a0061f 4188 stat = (u64 *) &irb->scsw;
fc19f381 4189 if (sense) {
a5a0061f
SW		 4190 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : "
4191 "%016llx %016llx %016llx %016llx",
4192 reason, *stat, *((u32 *) (stat + 1)),
ed3640b2 4193 sense[0], sense[1], sense[2], sense[3]);
fc19f381 4194 } else {
a5a0061f
SW		 4195 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s",
4196 reason, *stat, *((u32 *) (stat + 1)),
4197 "NO VALID SENSE");
fc19f381
SH		 4198 }
4199}
4200
1da177e4
LT		 4201/*
4202 * Print sense data and related channel program.
4203 * Parts are printed because printk buffer is only 1024 bytes.
4204 */
f3eb5384 4205static void dasd_eckd_dump_sense_ccw(struct dasd_device *device,
8e09f215 4206 struct dasd_ccw_req *req, struct irb *irb)
1da177e4
LT		 4207{
4208 char *page;
445b5b49
HH		 4209 struct ccw1 *first, *last, *fail, *from, *to;
4210 int len, sl, sct;
1da177e4
LT		 4211
4212 page = (char *) get_zeroed_page(GFP_ATOMIC);
4213 if (page == NULL) {
fc19f381
SH		 4214 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
4215 "No memory to dump sense data\n");
1da177e4
LT		 4216 return;
4217 }
445b5b49 4218 /* dump the sense data */
773bab4a 4219 len = sprintf(page, PRINTK_HEADER
1da177e4 4220 " I/O status report for device %s:\n",
2a0217d5 4221 dev_name(&device->cdev->dev));
773bab4a 4222 len += sprintf(page + len, PRINTK_HEADER
a5a0061f
SW		 4223 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
4224 "CS:%02X RC:%d\n",
4225 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw),
4226 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw),
4227 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw),
4228 req ? req->intrc : 0);
773bab4a 4229 len += sprintf(page + len, PRINTK_HEADER
1da177e4 4230 " device %s: Failing CCW: %p\n",
2a0217d5 4231 dev_name(&device->cdev->dev),
23d805b6 4232 (void *) (addr_t) irb->scsw.cmd.cpa);
1da177e4
LT		 4233 if (irb->esw.esw0.erw.cons) {
4234 for (sl = 0; sl < 4; sl++) {
773bab4a 4235 len += sprintf(page + len, PRINTK_HEADER
1da177e4
LT		 4236 " Sense(hex) %2d-%2d:",
4237 (8 * sl), ((8 * sl) + 7));
4238
4239 for (sct = 0; sct < 8; sct++) {
4240 len += sprintf(page + len, " %02x",
4241 irb->ecw[8 * sl + sct]);
4242 }
4243 len += sprintf(page + len, "\n");
4244 }
4245
4246 if (irb->ecw[27] & DASD_SENSE_BIT_0) {
4247 /* 24 Byte Sense Data */
773bab4a 4248 sprintf(page + len, PRINTK_HEADER
445b5b49
HH		 4249 " 24 Byte: %x MSG %x, "
4250 "%s MSGb to SYSOP\n",
4251 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f,
4252 irb->ecw[1] & 0x10 ? "" : "no");
1da177e4
LT		 4253 } else {
4254 /* 32 Byte Sense Data */
773bab4a 4255 sprintf(page + len, PRINTK_HEADER
445b5b49
HH		 4256 " 32 Byte: Format: %x "
4257 "Exception class %x\n",
4258 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4);
1da177e4
LT		 4259 }
4260 } else {
773bab4a 4261 sprintf(page + len, PRINTK_HEADER
445b5b49 4262 " SORRY - NO VALID SENSE AVAILABLE\n");
1da177e4 4263 }
773bab4a 4264 printk(KERN_ERR "%s", page);
445b5b49 4265
8e09f215
SW		 4266 if (req) {
4267 /* req == NULL for unsolicited interrupts */
4268 /* dump the Channel Program (max 140 Bytes per line) */
4269 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */
4270 first = req->cpaddr;
4271 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++);
4272 to = min(first + 6, last);
773bab4a 4273 len = sprintf(page, PRINTK_HEADER
8e09f215
SW		 4274 " Related CP in req: %p\n", req);
4275 dasd_eckd_dump_ccw_range(first, to, page + len);
773bab4a 4276 printk(KERN_ERR "%s", page);
1da177e4 4277
8e09f215
SW		 4278 /* print failing CCW area (maximum 4) */
4279 /* scsw->cda is either valid or zero */
4280 len = 0;
4281 from = ++to;
23d805b6
PO		 4282 fail = (struct ccw1 *)(addr_t)
4283 irb->scsw.cmd.cpa; /* failing CCW */
8e09f215
SW		 4284 if (from < fail - 2) {
4285 from = fail - 2; /* there is a gap - print header */
773bab4a 4286 len += sprintf(page, PRINTK_HEADER "......\n");
8e09f215
SW		 4287 }
4288 to = min(fail + 1, last);
4289 len += dasd_eckd_dump_ccw_range(from, to, page + len);
4290
4291 /* print last CCWs (maximum 2) */
4292 from = max(from, ++to);
4293 if (from < last - 1) {
4294 from = last - 1; /* there is a gap - print header */
773bab4a 4295 len += sprintf(page + len, PRINTK_HEADER "......\n");
8e09f215
SW		 4296 }
4297 len += dasd_eckd_dump_ccw_range(from, last, page + len);
4298 if (len > 0)
773bab4a 4299 printk(KERN_ERR "%s", page);
1da177e4 4300 }
1da177e4
LT		 4301 free_page((unsigned long) page);
4302}
4303
f3eb5384
SW		 4304
4305/*
4306 * Print sense data from a tcw.
4307 */
4308static void dasd_eckd_dump_sense_tcw(struct dasd_device *device,
4309 struct dasd_ccw_req *req, struct irb *irb)
4310{
4311 char *page;
4312 int len, sl, sct, residual;
f3eb5384 4313 struct tsb *tsb;
ef19298b 4314 u8 *sense, *rcq;
f3eb5384
SW		 4315
4316 page = (char *) get_zeroed_page(GFP_ATOMIC);
4317 if (page == NULL) {
fc19f381 4318 DBF_DEV_EVENT(DBF_WARNING, device, " %s",
f3eb5384
SW		 4319 "No memory to dump sense data");
4320 return;
4321 }
4322 /* dump the sense data */
773bab4a 4323 len = sprintf(page, PRINTK_HEADER
f3eb5384
SW		 4324 " I/O status report for device %s:\n",
4325 dev_name(&device->cdev->dev));
773bab4a 4326 len += sprintf(page + len, PRINTK_HEADER
a5a0061f
SW		 4327 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
4328 "CS:%02X fcxs:%02X schxs:%02X RC:%d\n",
4329 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw),
4330 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw),
4331 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw),
4332 irb->scsw.tm.fcxs, irb->scsw.tm.schxs,
4333 req ? req->intrc : 0);
773bab4a 4334 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4335 " device %s: Failing TCW: %p\n",
4336 dev_name(&device->cdev->dev),
4337 (void *) (addr_t) irb->scsw.tm.tcw);
4338
4339 tsb = NULL;
4340 sense = NULL;
a5a0061f 4341 if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01))
f3eb5384
SW		 4342 tsb = tcw_get_tsb(
4343 (struct tcw *)(unsigned long)irb->scsw.tm.tcw);
4344
b8fde722 4345 if (tsb) {
773bab4a 4346 len += sprintf(page + len, PRINTK_HEADER
f3eb5384 4347 " tsb->length %d\n", tsb->length);
773bab4a 4348 len += sprintf(page + len, PRINTK_HEADER
f3eb5384 4349 " tsb->flags %x\n", tsb->flags);
773bab4a 4350 len += sprintf(page + len, PRINTK_HEADER
f3eb5384 4351 " tsb->dcw_offset %d\n", tsb->dcw_offset);
773bab4a 4352 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4353 " tsb->count %d\n", tsb->count);
4354 residual = tsb->count - 28;
773bab4a 4355 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4356 " residual %d\n", residual);
4357
4358 switch (tsb->flags & 0x07) {
4359 case 1: /* tsa_iostat */
773bab4a 4360 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4361 " tsb->tsa.iostat.dev_time %d\n",
4362 tsb->tsa.iostat.dev_time);
773bab4a 4363 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4364 " tsb->tsa.iostat.def_time %d\n",
4365 tsb->tsa.iostat.def_time);
773bab4a 4366 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4367 " tsb->tsa.iostat.queue_time %d\n",
4368 tsb->tsa.iostat.queue_time);
773bab4a 4369 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4370 " tsb->tsa.iostat.dev_busy_time %d\n",
4371 tsb->tsa.iostat.dev_busy_time);
773bab4a 4372 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4373 " tsb->tsa.iostat.dev_act_time %d\n",
4374 tsb->tsa.iostat.dev_act_time);
4375 sense = tsb->tsa.iostat.sense;
4376 break;
4377 case 2: /* ts_ddpc */
773bab4a 4378 len += sprintf(page + len, PRINTK_HEADER
f3eb5384 4379 " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc);
ef19298b 4380 for (sl = 0; sl < 2; sl++) {
773bab4a 4381 len += sprintf(page + len, PRINTK_HEADER
ef19298b
SW		 4382 " tsb->tsa.ddpc.rcq %2d-%2d: ",
4383 (8 * sl), ((8 * sl) + 7));
4384 rcq = tsb->tsa.ddpc.rcq;
f3eb5384
SW		 4385 for (sct = 0; sct < 8; sct++) {
4386 len += sprintf(page + len, " %02x",
ef19298b 4387 rcq[8 * sl + sct]);
f3eb5384
SW		 4388 }
4389 len += sprintf(page + len, "\n");
4390 }
4391 sense = tsb->tsa.ddpc.sense;
4392 break;
4393 case 3: /* tsa_intrg */
773bab4a
SO		 4394 len += sprintf(page + len, PRINTK_HEADER
4395 " tsb->tsa.intrg.: not supportet yet\n");
f3eb5384
SW		 4396 break;
4397 }
4398
4399 if (sense) {
4400 for (sl = 0; sl < 4; sl++) {
773bab4a 4401 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4402 " Sense(hex) %2d-%2d:",
4403 (8 * sl), ((8 * sl) + 7));
4404 for (sct = 0; sct < 8; sct++) {
4405 len += sprintf(page + len, " %02x",
4406 sense[8 * sl + sct]);
4407 }
4408 len += sprintf(page + len, "\n");
4409 }
4410
4411 if (sense[27] & DASD_SENSE_BIT_0) {
4412 /* 24 Byte Sense Data */
773bab4a 4413 sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4414 " 24 Byte: %x MSG %x, "
4415 "%s MSGb to SYSOP\n",
4416 sense[7] >> 4, sense[7] & 0x0f,
4417 sense[1] & 0x10 ? "" : "no");
4418 } else {
4419 /* 32 Byte Sense Data */
773bab4a 4420 sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4421 " 32 Byte: Format: %x "
4422 "Exception class %x\n",
4423 sense[6] & 0x0f, sense[22] >> 4);
4424 }
4425 } else {
773bab4a 4426 sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4427 " SORRY - NO VALID SENSE AVAILABLE\n");
4428 }
4429 } else {
773bab4a 4430 sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4431 " SORRY - NO TSB DATA AVAILABLE\n");
4432 }
773bab4a 4433 printk(KERN_ERR "%s", page);
f3eb5384
SW		 4434 free_page((unsigned long) page);
4435}
4436
4437static void dasd_eckd_dump_sense(struct dasd_device *device,
4438 struct dasd_ccw_req *req, struct irb *irb)
4439{
a5a0061f 4440 if (scsw_is_tm(&irb->scsw))
f3eb5384
SW		 4441 dasd_eckd_dump_sense_tcw(device, req, irb);
4442 else
4443 dasd_eckd_dump_sense_ccw(device, req, irb);
4444}
4445
501183f2 4446static int dasd_eckd_pm_freeze(struct dasd_device *device)
d41dd122
SH		 4447{
4448 /*
4449 * the device should be disconnected from our LCU structure
4450 * on restore we will reconnect it and reread LCU specific
4451 * information like PAV support that might have changed
4452 */
4453 dasd_alias_remove_device(device);
4454 dasd_alias_disconnect_device_from_lcu(device);
4455
4456 return 0;
4457}
4458
501183f2 4459static int dasd_eckd_restore_device(struct dasd_device *device)
d41dd122
SH		 4460{
4461 struct dasd_eckd_private *private;
6fca97a9 4462 struct dasd_eckd_characteristics temp_rdc_data;
f9f8d02f 4463 int rc;
d41dd122 4464 struct dasd_uid temp_uid;
a7602f6c 4465 unsigned long flags;
ea4da6ea 4466 unsigned long cqr_flags = 0;
d41dd122 4467
d41dd122
SH		 4468 private = (struct dasd_eckd_private *) device->private;
4469
4470 /* Read Configuration Data */
251afd69
SH		 4471 rc = dasd_eckd_read_conf(device);
4472 if (rc) {
4473 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
4474 "Read configuration data failed, rc=%d", rc);
4475 goto out_err;
4476 }
d41dd122 4477
2dedf0d9
SH		 4478 dasd_eckd_get_uid(device, &temp_uid);
4479 /* Generate device unique id */
4480 rc = dasd_eckd_generate_uid(device);
4481 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
d41dd122 4482 if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0)
a7602f6c
SH		 4483 dev_err(&device->cdev->dev, "The UID of the DASD has "
4484 "changed\n");
2dedf0d9 4485 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
d41dd122
SH		 4486 if (rc)
4487 goto out_err;
d41dd122
SH		 4488
4489 /* register lcu with alias handling, enable PAV if this is a new lcu */
f9f8d02f
SH		 4490 rc = dasd_alias_make_device_known_to_lcu(device);
4491 if (rc)
251afd69 4492 goto out_err;
ea4da6ea
SH		 4493
4494 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags);
4495 dasd_eckd_validate_server(device, cqr_flags);
f4ac1d02
SW		 4496
4497 /* RE-Read Configuration Data */
251afd69
SH		 4498 rc = dasd_eckd_read_conf(device);
4499 if (rc) {
4500 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
4501 "Read configuration data failed, rc=%d", rc);
4502 goto out_err2;
4503 }
d41dd122
SH		 4504
4505 /* Read Feature Codes */
68d1e5f0 4506 dasd_eckd_read_features(device);
d41dd122
SH		 4507
4508 /* Read Device Characteristics */
68b781fe 4509 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
6fca97a9 4510 &temp_rdc_data, 64);
d41dd122 4511 if (rc) {
b8ed5dd5
SH		 4512 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
4513 "Read device characteristic failed, rc=%d", rc);
251afd69 4514 goto out_err2;
d41dd122 4515 }
a7602f6c 4516 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
6fca97a9 4517 memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data));
a7602f6c 4518 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
d41dd122
SH		 4519
4520 /* add device to alias management */
4521 dasd_alias_add_device(device);
4522
4523 return 0;
4524
251afd69
SH		 4525out_err2:
4526 dasd_alias_disconnect_device_from_lcu(device);
d41dd122 4527out_err:
e6125fba 4528 return -1;
d41dd122
SH		 4529}
4530
501183f2
SH		 4531static int dasd_eckd_reload_device(struct dasd_device *device)
4532{
4533 struct dasd_eckd_private *private;
4534 int rc, old_base;
2dedf0d9
SH		 4535 char print_uid[60];
4536 struct dasd_uid uid;
4537 unsigned long flags;
501183f2
SH		 4538
4539 private = (struct dasd_eckd_private *) device->private;
2dedf0d9
SH		 4540
4541 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
501183f2 4542 old_base = private->uid.base_unit_addr;
2dedf0d9
SH		 4543 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
4544
501183f2
SH		 4545 /* Read Configuration Data */
4546 rc = dasd_eckd_read_conf(device);
4547 if (rc)
4548 goto out_err;
4549
2dedf0d9 4550 rc = dasd_eckd_generate_uid(device);
501183f2
SH		 4551 if (rc)
4552 goto out_err;
501183f2
SH		 4553 /*
4554 * update unit address configuration and
4555 * add device to alias management
4556 */
4557 dasd_alias_update_add_device(device);
4558
2dedf0d9
SH		 4559 dasd_eckd_get_uid(device, &uid);
4560
4561 if (old_base != uid.base_unit_addr) {
4562 if (strlen(uid.vduit) > 0)
4563 snprintf(print_uid, sizeof(print_uid),
4564 "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial,
4565 uid.ssid, uid.base_unit_addr, uid.vduit);
501183f2 4566 else
2dedf0d9
SH		 4567 snprintf(print_uid, sizeof(print_uid),
4568 "%s.%s.%04x.%02x", uid.vendor, uid.serial,
4569 uid.ssid, uid.base_unit_addr);
501183f2
SH		 4570
4571 dev_info(&device->cdev->dev,
4572 "An Alias device was reassigned to a new base device "
2dedf0d9 4573 "with UID: %s\n", print_uid);
501183f2
SH		 4574 }
4575 return 0;
4576
4577out_err:
4578 return -1;
4579}
4580
5db8440c
SH		 4581static int dasd_eckd_read_message_buffer(struct dasd_device *device,
4582 struct dasd_rssd_messages *messages,
4583 __u8 lpum)
4584{
4585 struct dasd_rssd_messages *message_buf;
4586 struct dasd_psf_prssd_data *prssdp;
4587 struct dasd_eckd_private *private;
4588 struct dasd_ccw_req *cqr;
4589 struct ccw1 *ccw;
4590 int rc;
4591
4592 private = (struct dasd_eckd_private *) device->private;
4593 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
4594 (sizeof(struct dasd_psf_prssd_data) +
4595 sizeof(struct dasd_rssd_messages)),
4596 device);
4597 if (IS_ERR(cqr)) {
4598 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
4599 "Could not allocate read message buffer request");
4600 return PTR_ERR(cqr);
4601 }
4602
4603 cqr->startdev = device;
4604 cqr->memdev = device;
4605 cqr->block = NULL;
5db8440c 4606 cqr->expires = 10 * HZ;
5db8440c 4607 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags);
b179b037
SH		 4608 /* dasd_sleep_on_immediatly does not do complex error
4609 * recovery so clear erp flag and set retry counter to
4610 * do basic erp */
4611 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
4612 cqr->retries = 256;
5db8440c
SH		 4613
4614 /* Prepare for Read Subsystem Data */
4615 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
4616 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
4617 prssdp->order = PSF_ORDER_PRSSD;
4618 prssdp->suborder = 0x03; /* Message Buffer */
4619 /* all other bytes of prssdp must be zero */
4620
4621 ccw = cqr->cpaddr;
4622 ccw->cmd_code = DASD_ECKD_CCW_PSF;
4623 ccw->count = sizeof(struct dasd_psf_prssd_data);
4624 ccw->flags |= CCW_FLAG_CC;
4625 ccw->flags |= CCW_FLAG_SLI;
4626 ccw->cda = (__u32)(addr_t) prssdp;
4627
4628 /* Read Subsystem Data - message buffer */
4629 message_buf = (struct dasd_rssd_messages *) (prssdp + 1);
4630 memset(message_buf, 0, sizeof(struct dasd_rssd_messages));
4631
4632 ccw++;
4633 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
4634 ccw->count = sizeof(struct dasd_rssd_messages);
4635 ccw->flags |= CCW_FLAG_SLI;
4636 ccw->cda = (__u32)(addr_t) message_buf;
4637
4638 cqr->buildclk = get_tod_clock();
4639 cqr->status = DASD_CQR_FILLED;
4640 rc = dasd_sleep_on_immediatly(cqr);
4641 if (rc == 0) {
4642 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
4643 message_buf = (struct dasd_rssd_messages *)
4644 (prssdp + 1);
4645 memcpy(messages, message_buf,
4646 sizeof(struct dasd_rssd_messages));
4647 } else
4648 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
4649 "Reading messages failed with rc=%d\n"
4650 , rc);
4651 dasd_sfree_request(cqr, cqr->memdev);
4652 return rc;
4653}
4654
4655/*
4656 * Perform Subsystem Function - CUIR response
4657 */
4658static int
4659dasd_eckd_psf_cuir_response(struct dasd_device *device, int response,
4660 __u32 message_id,
4661 struct channel_path_desc *desc,
4662 struct subchannel_id sch_id)
4663{
4664 struct dasd_psf_cuir_response *psf_cuir;
4665 struct dasd_ccw_req *cqr;
4666 struct ccw1 *ccw;
4667 int rc;
4668
4669 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ ,
4670 sizeof(struct dasd_psf_cuir_response),
4671 device);
4672
4673 if (IS_ERR(cqr)) {
4674 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
4675 "Could not allocate PSF-CUIR request");
4676 return PTR_ERR(cqr);
4677 }
4678
4679 psf_cuir = (struct dasd_psf_cuir_response *)cqr->data;
4680 psf_cuir->order = PSF_ORDER_CUIR_RESPONSE;
4681 psf_cuir->cc = response;
4682 if (desc)
4683 psf_cuir->chpid = desc->chpid;
4684 psf_cuir->message_id = message_id;
4685 psf_cuir->cssid = sch_id.cssid;
4686 psf_cuir->ssid = sch_id.ssid;
5db8440c
SH		 4687 ccw = cqr->cpaddr;
4688 ccw->cmd_code = DASD_ECKD_CCW_PSF;
4689 ccw->cda = (__u32)(addr_t)psf_cuir;
b179b037 4690 ccw->flags = CCW_FLAG_SLI;
5db8440c
SH		 4691 ccw->count = sizeof(struct dasd_psf_cuir_response);
4692
4693 cqr->startdev = device;
4694 cqr->memdev = device;
4695 cqr->block = NULL;
4696 cqr->retries = 256;
4697 cqr->expires = 10*HZ;
4698 cqr->buildclk = get_tod_clock();
4699 cqr->status = DASD_CQR_FILLED;
b179b037 4700 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags);
5db8440c
SH		 4701
4702 rc = dasd_sleep_on(cqr);
4703
4704 dasd_sfree_request(cqr, cqr->memdev);
4705 return rc;
4706}
4707
b179b037
SH		 4708/*
4709 * return configuration data that is referenced by record selector
4710 * if a record selector is specified or per default return the
4711 * conf_data pointer for the path specified by lpum
4712 */
4713static struct dasd_conf_data *dasd_eckd_get_ref_conf(struct dasd_device *device,
4714 __u8 lpum,
4715 struct dasd_cuir_message *cuir)
5db8440c 4716{
b179b037
SH		 4717 struct dasd_eckd_private *private;
4718 struct dasd_conf_data *conf_data;
4719 int path, pos;
5db8440c 4720
b179b037
SH		 4721 private = (struct dasd_eckd_private *) device->private;
4722 if (cuir->record_selector == 0)
4723 goto out;
4724 for (path = 0x80, pos = 0; path; path >>= 1, pos++) {
4725 conf_data = private->path_conf_data[pos];
4726 if (conf_data->gneq.record_selector ==
4727 cuir->record_selector)
4728 return conf_data;
5db8440c 4729 }
b179b037 4730out:
9d49f86d 4731 return private->path_conf_data[pathmask_to_pos(lpum)];
5db8440c
SH		 4732}
4733
4734/*
b179b037
SH		 4735 * This function determines the scope of a reconfiguration request by
4736 * analysing the path and device selection data provided in the CUIR request.
4737 * Returns a path mask containing CUIR affected paths for the give device.
4738 *
4739 * If the CUIR request does not contain the required information return the
4740 * path mask of the path the attention message for the CUIR request was reveived
4741 * on.
4742 */
4743static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum,
4744 struct dasd_cuir_message *cuir)
4745{
4746 struct dasd_conf_data *ref_conf_data;
4747 unsigned long bitmask = 0, mask = 0;
4748 struct dasd_eckd_private *private;
4749 struct dasd_conf_data *conf_data;
4750 unsigned int pos, path;
4751 char *ref_gneq, *gneq;
4752 char *ref_ned, *ned;
4753 int tbcpm = 0;
4754
4755 /* if CUIR request does not specify the scope use the path
4756 the attention message was presented on */
4757 if (!cuir->ned_map ||
4758 !(cuir->neq_map[0] | cuir->neq_map[1] | cuir->neq_map[2]))
4759 return lpum;
4760
4761 private = (struct dasd_eckd_private *) device->private;
4762 /* get reference conf data */
4763 ref_conf_data = dasd_eckd_get_ref_conf(device, lpum, cuir);
4764 /* reference ned is determined by ned_map field */
4765 pos = 8 - ffs(cuir->ned_map);
4766 ref_ned = (char *)&ref_conf_data->neds[pos];
4767 ref_gneq = (char *)&ref_conf_data->gneq;
4768 /* transfer 24 bit neq_map to mask */
4769 mask = cuir->neq_map[2];
4770 mask |= cuir->neq_map[1] << 8;
4771 mask |= cuir->neq_map[0] << 16;
4772
4773 for (path = 0x80; path; path >>= 1) {
4774 /* initialise data per path */
4775 bitmask = mask;
9d49f86d 4776 pos = pathmask_to_pos(path);
b179b037
SH		 4777 conf_data = private->path_conf_data[pos];
4778 pos = 8 - ffs(cuir->ned_map);
4779 ned = (char *) &conf_data->neds[pos];
4780 /* compare reference ned and per path ned */
4781 if (memcmp(ref_ned, ned, sizeof(*ned)) != 0)
4782 continue;
4783 gneq = (char *)&conf_data->gneq;
4784 /* compare reference gneq and per_path gneq under
4785 24 bit mask where mask bit 0 equals byte 7 of
4786 the gneq and mask bit 24 equals byte 31 */
4787 while (bitmask) {
4788 pos = ffs(bitmask) - 1;
4789 if (memcmp(&ref_gneq[31 - pos], &gneq[31 - pos], 1)
4790 != 0)
4791 break;
4792 clear_bit(pos, &bitmask);
4793 }
4794 if (bitmask)
4795 continue;
4796 /* device and path match the reference values
4797 add path to CUIR scope */
4798 tbcpm |= path;
4799 }
4800 return tbcpm;
4801}
4802
4803static void dasd_eckd_cuir_notify_user(struct dasd_device *device,
4804 unsigned long paths,
4805 struct subchannel_id sch_id, int action)
4806{
4807 struct channel_path_desc *desc;
4808 int pos;
4809
4810 while (paths) {
4811 /* get position of bit in mask */
4812 pos = ffs(paths) - 1;
4813 /* get channel path descriptor from this position */
4814 desc = ccw_device_get_chp_desc(device->cdev, 7 - pos);
4815 if (action == CUIR_QUIESCE)
4816 pr_warn("Service on the storage server caused path "
4817 "%x.%02x to go offline", sch_id.cssid,
4818 desc ? desc->chpid : 0);
4819 else if (action == CUIR_RESUME)
4820 pr_info("Path %x.%02x is back online after service "
4821 "on the storage server", sch_id.cssid,
4822 desc ? desc->chpid : 0);
4823 kfree(desc);
4824 clear_bit(pos, &paths);
4825 }
4826}
4827
4828static int dasd_eckd_cuir_remove_path(struct dasd_device *device, __u8 lpum,
4829 struct dasd_cuir_message *cuir)
4830{
4831 unsigned long tbcpm;
4832
4833 tbcpm = dasd_eckd_cuir_scope(device, lpum, cuir);
4834 /* nothing to do if path is not in use */
4835 if (!(device->path_data.opm & tbcpm))
4836 return 0;
4837 if (!(device->path_data.opm & ~tbcpm)) {
4838 /* no path would be left if the CUIR action is taken
4839 return error */
4840 return -EINVAL;
4841 }
4842 /* remove device from operational path mask */
4843 device->path_data.opm &= ~tbcpm;
4844 device->path_data.cuirpm |= tbcpm;
4845 return tbcpm;
4846}
4847
4848/*
4849 * walk through all devices and build a path mask to quiesce them
4850 * return an error if the last path to a device would be removed
5db8440c
SH		 4851 *
4852 * if only part of the devices are quiesced and an error
4853 * occurs no onlining necessary, the storage server will
4854 * notify the already set offline devices again
4855 */
4856static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum,
b179b037
SH		 4857 struct subchannel_id sch_id,
4858 struct dasd_cuir_message *cuir)
5db8440c
SH		 4859{
4860 struct alias_pav_group *pavgroup, *tempgroup;
4861 struct dasd_eckd_private *private;
4862 struct dasd_device *dev, *n;
b179b037
SH		 4863 unsigned long paths = 0;
4864 unsigned long flags;
4865 int tbcpm;
5db8440c
SH		 4866
4867 private = (struct dasd_eckd_private *) device->private;
5db8440c 4868 /* active devices */
b179b037 4869 list_for_each_entry_safe(dev, n, &private->lcu->active_devices,
5db8440c 4870 alias_list) {
b179b037
SH		 4871 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
4872 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
4873 spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags);
4874 if (tbcpm < 0)
4875 goto out_err;
4876 paths |= tbcpm;
5db8440c 4877 }
5db8440c 4878 /* inactive devices */
b179b037 4879 list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices,
5db8440c 4880 alias_list) {
b179b037
SH		 4881 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
4882 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
4883 spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags);
4884 if (tbcpm < 0)
4885 goto out_err;
4886 paths |= tbcpm;
5db8440c 4887 }
5db8440c
SH		 4888 /* devices in PAV groups */
4889 list_for_each_entry_safe(pavgroup, tempgroup,
4890 &private->lcu->grouplist, group) {
4891 list_for_each_entry_safe(dev, n, &pavgroup->baselist,
4892 alias_list) {
b179b037
SH		 4893 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
4894 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
4895 spin_unlock_irqrestore(
4896 get_ccwdev_lock(dev->cdev), flags);
4897 if (tbcpm < 0)
4898 goto out_err;
4899 paths |= tbcpm;
5db8440c
SH		 4900 }
4901 list_for_each_entry_safe(dev, n, &pavgroup->aliaslist,
4902 alias_list) {
b179b037
SH		 4903 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
4904 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
4905 spin_unlock_irqrestore(
4906 get_ccwdev_lock(dev->cdev), flags);
4907 if (tbcpm < 0)
4908 goto out_err;
4909 paths |= tbcpm;
5db8440c
SH		 4910 }
4911 }
b179b037
SH		 4912 /* notify user about all paths affected by CUIR action */
4913 dasd_eckd_cuir_notify_user(device, paths, sch_id, CUIR_QUIESCE);
4914 return 0;
4915out_err:
4916 return tbcpm;
5db8440c
SH		 4917}
4918
4919static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum,
b179b037
SH		 4920 struct subchannel_id sch_id,
4921 struct dasd_cuir_message *cuir)
5db8440c
SH		 4922{
4923 struct alias_pav_group *pavgroup, *tempgroup;
4924 struct dasd_eckd_private *private;
4925 struct dasd_device *dev, *n;
b179b037
SH		 4926 unsigned long paths = 0;
4927 int tbcpm;
5db8440c 4928
5db8440c 4929 private = (struct dasd_eckd_private *) device->private;
5db8440c
SH		 4930 /*
4931 * the path may have been added through a generic path event before
4932 * only trigger path verification if the path is not already in use
4933 */
5db8440c
SH		 4934 list_for_each_entry_safe(dev, n,
4935 &private->lcu->active_devices,
4936 alias_list) {
b179b037
SH		 4937 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
4938 paths |= tbcpm;
4939 if (!(dev->path_data.opm & tbcpm)) {
4940 dev->path_data.tbvpm |= tbcpm;
5db8440c
SH		 4941 dasd_schedule_device_bh(dev);
4942 }
4943 }
5db8440c
SH		 4944 list_for_each_entry_safe(dev, n,
4945 &private->lcu->inactive_devices,
4946 alias_list) {
b179b037
SH		 4947 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
4948 paths |= tbcpm;
4949 if (!(dev->path_data.opm & tbcpm)) {
4950 dev->path_data.tbvpm |= tbcpm;
5db8440c
SH		 4951 dasd_schedule_device_bh(dev);
4952 }
4953 }
5db8440c
SH		 4954 /* devices in PAV groups */
4955 list_for_each_entry_safe(pavgroup, tempgroup,
4956 &private->lcu->grouplist,
4957 group) {
4958 list_for_each_entry_safe(dev, n,
4959 &pavgroup->baselist,
4960 alias_list) {
b179b037
SH		 4961 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
4962 paths |= tbcpm;
4963 if (!(dev->path_data.opm & tbcpm)) {
4964 dev->path_data.tbvpm |= tbcpm;
5db8440c
SH		 4965 dasd_schedule_device_bh(dev);
4966 }
4967 }
4968 list_for_each_entry_safe(dev, n,
4969 &pavgroup->aliaslist,
4970 alias_list) {
b179b037
SH		 4971 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
4972 paths |= tbcpm;
4973 if (!(dev->path_data.opm & tbcpm)) {
4974 dev->path_data.tbvpm |= tbcpm;
5db8440c
SH		 4975 dasd_schedule_device_bh(dev);
4976 }
4977 }
4978 }
b179b037
SH		 4979 /* notify user about all paths affected by CUIR action */
4980 dasd_eckd_cuir_notify_user(device, paths, sch_id, CUIR_RESUME);
4981 return 0;
5db8440c
SH		 4982}
4983
4984static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages,
4985 __u8 lpum)
4986{
4987 struct dasd_cuir_message *cuir = messages;
4988 struct channel_path_desc *desc;
4989 struct subchannel_id sch_id;
4990 int pos, response;
5db8440c 4991
b179b037
SH		 4992 DBF_DEV_EVENT(DBF_WARNING, device,
4993 "CUIR request: %016llx %016llx %016llx %08x",
4994 ((u64 *)cuir)[0], ((u64 *)cuir)[1], ((u64 *)cuir)[2],
4995 ((u32 *)cuir)[3]);
4996 ccw_device_get_schid(device->cdev, &sch_id);
9d49f86d 4997 pos = pathmask_to_pos(lpum);
5db8440c
SH		 4998 desc = ccw_device_get_chp_desc(device->cdev, pos);
4999
5000 if (cuir->code == CUIR_QUIESCE) {
5001 /* quiesce */
b179b037
SH		 5002 if (dasd_eckd_cuir_quiesce(device, lpum, sch_id, cuir))
5003 response = PSF_CUIR_LAST_PATH;
5004 else
5005 response = PSF_CUIR_COMPLETED;
5db8440c
SH		 5006 } else if (cuir->code == CUIR_RESUME) {
5007 /* resume */
b179b037
SH		 5008 dasd_eckd_cuir_resume(device, lpum, sch_id, cuir);
5009 response = PSF_CUIR_COMPLETED;
5db8440c
SH		 5010 } else
5011 response = PSF_CUIR_NOT_SUPPORTED;
5012
b179b037
SH		 5013 dasd_eckd_psf_cuir_response(device, response,
5014 cuir->message_id, desc, sch_id);
5015 DBF_DEV_EVENT(DBF_WARNING, device,
5016 "CUIR response: %d on message ID %08x", response,
5017 cuir->message_id);
5db8440c
SH		 5018 /* free descriptor copy */
5019 kfree(desc);
b179b037
SH		 5020 /* to make sure there is no attention left schedule work again */
5021 device->discipline->check_attention(device, lpum);
5db8440c
SH		 5022}
5023
5024static void dasd_eckd_check_attention_work(struct work_struct *work)
5025{
5026 struct check_attention_work_data *data;
5027 struct dasd_rssd_messages *messages;
5028 struct dasd_device *device;
5029 int rc;
5030
5031 data = container_of(work, struct check_attention_work_data, worker);
5032 device = data->device;
5db8440c
SH		 5033 messages = kzalloc(sizeof(*messages), GFP_KERNEL);
5034 if (!messages) {
5035 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
5036 "Could not allocate attention message buffer");
5037 goto out;
5038 }
5db8440c
SH		 5039 rc = dasd_eckd_read_message_buffer(device, messages, data->lpum);
5040 if (rc)
5041 goto out;
5db8440c
SH		 5042 if (messages->length == ATTENTION_LENGTH_CUIR &&
5043 messages->format == ATTENTION_FORMAT_CUIR)
5044 dasd_eckd_handle_cuir(device, messages, data->lpum);
5db8440c
SH		 5045out:
5046 dasd_put_device(device);
5047 kfree(messages);
5048 kfree(data);
5049}
5050
5051static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum)
5052{
5053 struct check_attention_work_data *data;
5054
5055 data = kzalloc(sizeof(*data), GFP_ATOMIC);
5056 if (!data)
5057 return -ENOMEM;
5058 INIT_WORK(&data->worker, dasd_eckd_check_attention_work);
5059 dasd_get_device(device);
5060 data->device = device;
5061 data->lpum = lpum;
5062 schedule_work(&data->worker);
5063 return 0;
5064}
5065
d41dd122 5066static struct ccw_driver dasd_eckd_driver = {
3bda058b
SO		 5067 .driver = {
5068 .name = "dasd-eckd",
5069 .owner = THIS_MODULE,
5070 },
d41dd122
SH		 5071 .ids = dasd_eckd_ids,
5072 .probe = dasd_eckd_probe,
5073 .remove = dasd_generic_remove,
5074 .set_offline = dasd_generic_set_offline,
5075 .set_online = dasd_eckd_set_online,
5076 .notify = dasd_generic_notify,
a4d26c6a 5077 .path_event = dasd_generic_path_event,
4679e893 5078 .shutdown = dasd_generic_shutdown,
d41dd122
SH		 5079 .freeze = dasd_generic_pm_freeze,
5080 .thaw = dasd_generic_restore_device,
5081 .restore = dasd_generic_restore_device,
a23ed009 5082 .uc_handler = dasd_generic_uc_handler,
420f42ec 5083 .int_class = IRQIO_DAS,
d41dd122 5084};
f3eb5384 5085
1da177e4
LT		 5086/*
5087 * max_blocks is dependent on the amount of storage that is available
5088 * in the static io buffer for each device. Currently each device has
5089 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has
5090 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use
5091 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In
5092 * addition we have one define extent ccw + 16 bytes of data and one
5093 * locate record ccw + 16 bytes of data. That makes:
5094 * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum.
5095 * We want to fit two into the available memory so that we can immediately
5096 * start the next request if one finishes off. That makes 249.5 blocks
5097 * for one request. Give a little safety and the result is 240.
5098 */
5099static struct dasd_discipline dasd_eckd_discipline = {
5100 .owner = THIS_MODULE,
5101 .name = "ECKD",
5102 .ebcname = "ECKD",
ef19298b 5103 .max_blocks = 190,
1da177e4 5104 .check_device = dasd_eckd_check_characteristics,
8e09f215 5105 .uncheck_device = dasd_eckd_uncheck_device,
1da177e4 5106 .do_analysis = dasd_eckd_do_analysis,
a4d26c6a 5107 .verify_path = dasd_eckd_verify_path,
d42e1712 5108 .basic_to_ready = dasd_eckd_basic_to_ready,
8e09f215 5109 .online_to_ready = dasd_eckd_online_to_ready,
daa991bf 5110 .basic_to_known = dasd_eckd_basic_to_known,
1da177e4
LT		 5111 .fill_geometry = dasd_eckd_fill_geometry,
5112 .start_IO = dasd_start_IO,
5113 .term_IO = dasd_term_IO,
8e09f215 5114 .handle_terminated_request = dasd_eckd_handle_terminated_request,
1da177e4 5115 .format_device = dasd_eckd_format_device,
1da177e4
LT		 5116 .erp_action = dasd_eckd_erp_action,
5117 .erp_postaction = dasd_eckd_erp_postaction,
5a27e60d 5118 .check_for_device_change = dasd_eckd_check_for_device_change,
8e09f215
SW		 5119 .build_cp = dasd_eckd_build_alias_cp,
5120 .free_cp = dasd_eckd_free_alias_cp,
1da177e4 5121 .dump_sense = dasd_eckd_dump_sense,
fc19f381 5122 .dump_sense_dbf = dasd_eckd_dump_sense_dbf,
1da177e4 5123 .fill_info = dasd_eckd_fill_info,
1107ccfb 5124 .ioctl = dasd_eckd_ioctl,
d41dd122
SH		 5125 .freeze = dasd_eckd_pm_freeze,
5126 .restore = dasd_eckd_restore_device,
501183f2 5127 .reload = dasd_eckd_reload_device,
2dedf0d9 5128 .get_uid = dasd_eckd_get_uid,
f1633031 5129 .kick_validate = dasd_eckd_kick_validate_server,
5db8440c 5130 .check_attention = dasd_eckd_check_attention,
1da177e4
LT		 5131};
5132
5133static int __init
5134dasd_eckd_init(void)
5135{
736e6ea0
SO		 5136 int ret;
5137
1da177e4 5138 ASCEBC(dasd_eckd_discipline.ebcname, 4);
f932bcea
SW		 5139 dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req),
5140 GFP_KERNEL | GFP_DMA);
5141 if (!dasd_reserve_req)
5142 return -ENOMEM;
a4d26c6a
SW		 5143 path_verification_worker = kmalloc(sizeof(*path_verification_worker),
5144 GFP_KERNEL | GFP_DMA);
5145 if (!path_verification_worker) {
5146 kfree(dasd_reserve_req);
5147 return -ENOMEM;
5148 }
558b9ef0
SW		 5149 rawpadpage = (void *)__get_free_page(GFP_KERNEL);
5150 if (!rawpadpage) {
5151 kfree(path_verification_worker);
5152 kfree(dasd_reserve_req);
5153 return -ENOMEM;
5154 }
736e6ea0
SO		 5155 ret = ccw_driver_register(&dasd_eckd_driver);
5156 if (!ret)
5157 wait_for_device_probe();
a4d26c6a
SW		 5158 else {
5159 kfree(path_verification_worker);
f932bcea 5160 kfree(dasd_reserve_req);
558b9ef0 5161 free_page((unsigned long)rawpadpage);
a4d26c6a 5162 }
736e6ea0 5163 return ret;
1da177e4
LT		 5164}
5165
5166static void __exit
5167dasd_eckd_cleanup(void)
5168{
5169 ccw_driver_unregister(&dasd_eckd_driver);
a4d26c6a 5170 kfree(path_verification_worker);
f932bcea 5171 kfree(dasd_reserve_req);
558b9ef0 5172 free_page((unsigned long)rawpadpage);
1da177e4
LT		 5173}
5174
5175module_init(dasd_eckd_init);
5176module_exit(dasd_eckd_cleanup);
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