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s390/ccwgroup: allow drivers to call set_{on,off}line
[mirror_ubuntu-hirsute-kernel.git] / drivers / s390 / block / dasd_eckd.c
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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>
1da177e4
LT		 32
33#include "dasd_int.h"
34#include "dasd_eckd.h"
35
36#ifdef PRINTK_HEADER
37#undef PRINTK_HEADER
38#endif /* PRINTK_HEADER */
39#define PRINTK_HEADER "dasd(eckd):"
40
41#define ECKD_C0(i) (i->home_bytes)
42#define ECKD_F(i) (i->formula)
43#define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\
44 (i->factors.f_0x02.f1))
45#define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\
46 (i->factors.f_0x02.f2))
47#define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\
48 (i->factors.f_0x02.f3))
49#define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0)
50#define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0)
51#define ECKD_F6(i) (i->factor6)
52#define ECKD_F7(i) (i->factor7)
53#define ECKD_F8(i) (i->factor8)
54
e4dbb0f2
SH		 55/*
56 * raw track access always map to 64k in memory
57 * so it maps to 16 blocks of 4k per track
58 */
59#define DASD_RAW_BLOCK_PER_TRACK 16
60#define DASD_RAW_BLOCKSIZE 4096
61/* 64k are 128 x 512 byte sectors */
62#define DASD_RAW_SECTORS_PER_TRACK 128
63
1da177e4
LT		 64MODULE_LICENSE("GPL");
65
66static struct dasd_discipline dasd_eckd_discipline;
67
1da177e4
LT		 68/* The ccw bus type uses this table to find devices that it sends to
69 * dasd_eckd_probe */
70static struct ccw_device_id dasd_eckd_ids[] = {
d2c993d8
HC		 71 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1},
72 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2},
5da24b76 73 { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info = 0x3},
d2c993d8
HC		 74 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4},
75 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5},
76 { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6},
77 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7},
78 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8},
79 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9},
80 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa},
1da177e4
LT		 81 { /* end of list */ },
82};
83
84MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids);
85
86static struct ccw_driver dasd_eckd_driver; /* see below */
87
eb6e199b
SW		 88#define INIT_CQR_OK 0
89#define INIT_CQR_UNFORMATTED 1
90#define INIT_CQR_ERROR 2
91
f932bcea
SW		 92/* emergency request for reserve/release */
93static struct {
94 struct dasd_ccw_req cqr;
95 struct ccw1 ccw;
96 char data[32];
97} *dasd_reserve_req;
98static DEFINE_MUTEX(dasd_reserve_mutex);
99
a4d26c6a
SW		 100/* definitions for the path verification worker */
101struct path_verification_work_data {
102 struct work_struct worker;
103 struct dasd_device *device;
104 struct dasd_ccw_req cqr;
105 struct ccw1 ccw;
106 __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE];
107 int isglobal;
108 __u8 tbvpm;
109};
110static struct path_verification_work_data *path_verification_worker;
111static DEFINE_MUTEX(dasd_path_verification_mutex);
eb6e199b 112
1da177e4
LT		 113/* initial attempt at a probe function. this can be simplified once
114 * the other detection code is gone */
115static int
116dasd_eckd_probe (struct ccw_device *cdev)
117{
118 int ret;
119
40545573 120 /* set ECKD specific ccw-device options */
454e1fa1
PO		 121 ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE |
122 CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH);
40545573 123 if (ret) {
b8ed5dd5
SH		 124 DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s",
125 "dasd_eckd_probe: could not set "
126 "ccw-device options");
1da177e4 127 return ret;
40545573
HH		 128 }
129 ret = dasd_generic_probe(cdev, &dasd_eckd_discipline);
130 return ret;
1da177e4
LT		 131}
132
133static int
134dasd_eckd_set_online(struct ccw_device *cdev)
135{
40545573 136 return dasd_generic_set_online(cdev, &dasd_eckd_discipline);
1da177e4
LT		 137}
138
1da177e4
LT		 139static const int sizes_trk0[] = { 28, 148, 84 };
140#define LABEL_SIZE 140
141
3bc9fef9
SH		 142/* head and record addresses of count_area read in analysis ccw */
143static const int count_area_head[] = { 0, 0, 0, 0, 2 };
144static const int count_area_rec[] = { 1, 2, 3, 4, 1 };
145
1da177e4
LT		 146static inline unsigned int
147round_up_multiple(unsigned int no, unsigned int mult)
148{
149 int rem = no % mult;
150 return (rem ? no - rem + mult : no);
151}
152
153static inline unsigned int
154ceil_quot(unsigned int d1, unsigned int d2)
155{
156 return (d1 + (d2 - 1)) / d2;
157}
158
4d284cac 159static unsigned int
1da177e4
LT		 160recs_per_track(struct dasd_eckd_characteristics * rdc,
161 unsigned int kl, unsigned int dl)
162{
163 int dn, kn;
164
165 switch (rdc->dev_type) {
166 case 0x3380:
167 if (kl)
168 return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) +
169 ceil_quot(dl + 12, 32));
170 else
171 return 1499 / (15 + ceil_quot(dl + 12, 32));
172 case 0x3390:
173 dn = ceil_quot(dl + 6, 232) + 1;
174 if (kl) {
175 kn = ceil_quot(kl + 6, 232) + 1;
176 return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) +
177 9 + ceil_quot(dl + 6 * dn, 34));
178 } else
179 return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34));
180 case 0x9345:
181 dn = ceil_quot(dl + 6, 232) + 1;
182 if (kl) {
183 kn = ceil_quot(kl + 6, 232) + 1;
184 return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) +
185 ceil_quot(dl + 6 * dn, 34));
186 } else
187 return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34));
188 }
189 return 0;
190}
191
b44b0ab3
SW		 192static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head)
193{
194 geo->cyl = (__u16) cyl;
195 geo->head = cyl >> 16;
196 geo->head <<= 4;
197 geo->head |= head;
198}
199
4d284cac 200static int
1da177e4
LT		 201check_XRC (struct ccw1 *de_ccw,
202 struct DE_eckd_data *data,
203 struct dasd_device *device)
204{
205 struct dasd_eckd_private *private;
d54853ef 206 int rc;
1da177e4
LT		 207
208 private = (struct dasd_eckd_private *) device->private;
d54853ef
MS		 209 if (!private->rdc_data.facilities.XRC_supported)
210 return 0;
1da177e4
LT		 211
212 /* switch on System Time Stamp - needed for XRC Support */
d54853ef
MS		 213 data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */
214 data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */
1da177e4 215
d54853ef
MS		 216 rc = get_sync_clock(&data->ep_sys_time);
217 /* Ignore return code if sync clock is switched off. */
a8f6db4d 218 if (rc == -EOPNOTSUPP || rc == -EACCES)
d54853ef 219 rc = 0;
1da177e4 220
8e09f215 221 de_ccw->count = sizeof(struct DE_eckd_data);
d54853ef
MS		 222 de_ccw->flags |= CCW_FLAG_SLI;
223 return rc;
224}
1da177e4 225
4d284cac 226static int
b44b0ab3
SW		 227define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk,
228 unsigned int totrk, int cmd, struct dasd_device *device)
1da177e4
LT		 229{
230 struct dasd_eckd_private *private;
b44b0ab3
SW		 231 u32 begcyl, endcyl;
232 u16 heads, beghead, endhead;
d54853ef 233 int rc = 0;
1da177e4
LT		 234
235 private = (struct dasd_eckd_private *) device->private;
236
237 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT;
238 ccw->flags = 0;
239 ccw->count = 16;
240 ccw->cda = (__u32) __pa(data);
241
8e09f215 242 memset(data, 0, sizeof(struct DE_eckd_data));
1da177e4
LT		 243 switch (cmd) {
244 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
245 case DASD_ECKD_CCW_READ_RECORD_ZERO:
246 case DASD_ECKD_CCW_READ:
247 case DASD_ECKD_CCW_READ_MT:
248 case DASD_ECKD_CCW_READ_CKD:
249 case DASD_ECKD_CCW_READ_CKD_MT:
250 case DASD_ECKD_CCW_READ_KD:
251 case DASD_ECKD_CCW_READ_KD_MT:
252 case DASD_ECKD_CCW_READ_COUNT:
253 data->mask.perm = 0x1;
254 data->attributes.operation = private->attrib.operation;
255 break;
256 case DASD_ECKD_CCW_WRITE:
257 case DASD_ECKD_CCW_WRITE_MT:
258 case DASD_ECKD_CCW_WRITE_KD:
259 case DASD_ECKD_CCW_WRITE_KD_MT:
260 data->mask.perm = 0x02;
261 data->attributes.operation = private->attrib.operation;
d54853ef 262 rc = check_XRC (ccw, data, device);
1da177e4
LT		 263 break;
264 case DASD_ECKD_CCW_WRITE_CKD:
265 case DASD_ECKD_CCW_WRITE_CKD_MT:
266 data->attributes.operation = DASD_BYPASS_CACHE;
d54853ef 267 rc = check_XRC (ccw, data, device);
1da177e4
LT		 268 break;
269 case DASD_ECKD_CCW_ERASE:
270 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
271 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
272 data->mask.perm = 0x3;
273 data->mask.auth = 0x1;
274 data->attributes.operation = DASD_BYPASS_CACHE;
d54853ef 275 rc = check_XRC (ccw, data, device);
1da177e4
LT		 276 break;
277 default:
fc19f381
SH		 278 dev_err(&device->cdev->dev,
279 "0x%x is not a known command\n", cmd);
1da177e4
LT		 280 break;
281 }
282
283 data->attributes.mode = 0x3; /* ECKD */
284
285 if ((private->rdc_data.cu_type == 0x2105 ||
286 private->rdc_data.cu_type == 0x2107 ||
287 private->rdc_data.cu_type == 0x1750)
288 && !(private->uses_cdl && trk < 2))
289 data->ga_extended |= 0x40; /* Regular Data Format Mode */
290
b44b0ab3
SW		 291 heads = private->rdc_data.trk_per_cyl;
292 begcyl = trk / heads;
293 beghead = trk % heads;
294 endcyl = totrk / heads;
295 endhead = totrk % heads;
1da177e4
LT		 296
297 /* check for sequential prestage - enhance cylinder range */
298 if (data->attributes.operation == DASD_SEQ_PRESTAGE ||
299 data->attributes.operation == DASD_SEQ_ACCESS) {
138c014d 300
b44b0ab3
SW		 301 if (endcyl + private->attrib.nr_cyl < private->real_cyl)
302 endcyl += private->attrib.nr_cyl;
1da177e4 303 else
b44b0ab3 304 endcyl = (private->real_cyl - 1);
1da177e4
LT		 305 }
306
b44b0ab3
SW		 307 set_ch_t(&data->beg_ext, begcyl, beghead);
308 set_ch_t(&data->end_ext, endcyl, endhead);
d54853ef 309 return rc;
1da177e4
LT		 310}
311
8e09f215
SW		 312static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata,
313 struct dasd_device *device)
314{
315 struct dasd_eckd_private *private;
316 int rc;
317
318 private = (struct dasd_eckd_private *) device->private;
319 if (!private->rdc_data.facilities.XRC_supported)
320 return 0;
321
322 /* switch on System Time Stamp - needed for XRC Support */
f3eb5384
SW		 323 pfxdata->define_extent.ga_extended |= 0x08; /* 'Time Stamp Valid' */
324 pfxdata->define_extent.ga_extended |= 0x02; /* 'Extended Parameter' */
8e09f215
SW		 325 pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */
326
f3eb5384 327 rc = get_sync_clock(&pfxdata->define_extent.ep_sys_time);
8e09f215 328 /* Ignore return code if sync clock is switched off. */
a8f6db4d 329 if (rc == -EOPNOTSUPP || rc == -EACCES)
8e09f215
SW		 330 rc = 0;
331 return rc;
332}
333
f3eb5384
SW		 334static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk,
335 unsigned int rec_on_trk, int count, int cmd,
336 struct dasd_device *device, unsigned int reclen,
337 unsigned int tlf)
338{
339 struct dasd_eckd_private *private;
340 int sector;
341 int dn, d;
342
343 private = (struct dasd_eckd_private *) device->private;
344
345 memset(data, 0, sizeof(*data));
346 sector = 0;
347 if (rec_on_trk) {
348 switch (private->rdc_data.dev_type) {
349 case 0x3390:
350 dn = ceil_quot(reclen + 6, 232);
351 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
352 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
353 break;
354 case 0x3380:
355 d = 7 + ceil_quot(reclen + 12, 32);
356 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
357 break;
358 }
359 }
360 data->sector = sector;
361 /* note: meaning of count depends on the operation
362 * for record based I/O it's the number of records, but for
363 * track based I/O it's the number of tracks
364 */
365 data->count = count;
366 switch (cmd) {
367 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
368 data->operation.orientation = 0x3;
369 data->operation.operation = 0x03;
370 break;
371 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
372 data->operation.orientation = 0x3;
373 data->operation.operation = 0x16;
374 break;
375 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
376 data->operation.orientation = 0x1;
377 data->operation.operation = 0x03;
378 data->count++;
379 break;
380 case DASD_ECKD_CCW_READ_RECORD_ZERO:
381 data->operation.orientation = 0x3;
382 data->operation.operation = 0x16;
383 data->count++;
384 break;
385 case DASD_ECKD_CCW_WRITE:
386 case DASD_ECKD_CCW_WRITE_MT:
387 case DASD_ECKD_CCW_WRITE_KD:
388 case DASD_ECKD_CCW_WRITE_KD_MT:
389 data->auxiliary.length_valid = 0x1;
390 data->length = reclen;
391 data->operation.operation = 0x01;
392 break;
393 case DASD_ECKD_CCW_WRITE_CKD:
394 case DASD_ECKD_CCW_WRITE_CKD_MT:
395 data->auxiliary.length_valid = 0x1;
396 data->length = reclen;
397 data->operation.operation = 0x03;
398 break;
e4dbb0f2
SH		 399 case DASD_ECKD_CCW_WRITE_FULL_TRACK:
400 data->operation.orientation = 0x0;
401 data->operation.operation = 0x3F;
402 data->extended_operation = 0x11;
403 data->length = 0;
404 data->extended_parameter_length = 0x02;
405 if (data->count > 8) {
406 data->extended_parameter[0] = 0xFF;
407 data->extended_parameter[1] = 0xFF;
408 data->extended_parameter[1] <<= (16 - count);
409 } else {
410 data->extended_parameter[0] = 0xFF;
411 data->extended_parameter[0] <<= (8 - count);
412 data->extended_parameter[1] = 0x00;
413 }
414 data->sector = 0xFF;
415 break;
f3eb5384
SW		 416 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
417 data->auxiliary.length_valid = 0x1;
418 data->length = reclen; /* not tlf, as one might think */
419 data->operation.operation = 0x3F;
420 data->extended_operation = 0x23;
421 break;
422 case DASD_ECKD_CCW_READ:
423 case DASD_ECKD_CCW_READ_MT:
424 case DASD_ECKD_CCW_READ_KD:
425 case DASD_ECKD_CCW_READ_KD_MT:
426 data->auxiliary.length_valid = 0x1;
427 data->length = reclen;
428 data->operation.operation = 0x06;
429 break;
430 case DASD_ECKD_CCW_READ_CKD:
431 case DASD_ECKD_CCW_READ_CKD_MT:
432 data->auxiliary.length_valid = 0x1;
433 data->length = reclen;
434 data->operation.operation = 0x16;
435 break;
436 case DASD_ECKD_CCW_READ_COUNT:
437 data->operation.operation = 0x06;
438 break;
e4dbb0f2
SH		 439 case DASD_ECKD_CCW_READ_TRACK:
440 data->operation.orientation = 0x1;
441 data->operation.operation = 0x0C;
442 data->extended_parameter_length = 0;
443 data->sector = 0xFF;
444 break;
f3eb5384
SW		 445 case DASD_ECKD_CCW_READ_TRACK_DATA:
446 data->auxiliary.length_valid = 0x1;
447 data->length = tlf;
448 data->operation.operation = 0x0C;
449 break;
450 case DASD_ECKD_CCW_ERASE:
451 data->length = reclen;
452 data->auxiliary.length_valid = 0x1;
453 data->operation.operation = 0x0b;
454 break;
455 default:
456 DBF_DEV_EVENT(DBF_ERR, device,
457 "fill LRE unknown opcode 0x%x", cmd);
458 BUG();
459 }
460 set_ch_t(&data->seek_addr,
461 trk / private->rdc_data.trk_per_cyl,
462 trk % private->rdc_data.trk_per_cyl);
463 data->search_arg.cyl = data->seek_addr.cyl;
464 data->search_arg.head = data->seek_addr.head;
465 data->search_arg.record = rec_on_trk;
466}
467
468static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
469 unsigned int trk, unsigned int totrk, int cmd,
470 struct dasd_device *basedev, struct dasd_device *startdev,
471 unsigned char format, unsigned int rec_on_trk, int count,
472 unsigned int blksize, unsigned int tlf)
8e09f215
SW		 473{
474 struct dasd_eckd_private *basepriv, *startpriv;
f3eb5384
SW		 475 struct DE_eckd_data *dedata;
476 struct LRE_eckd_data *lredata;
b44b0ab3
SW		 477 u32 begcyl, endcyl;
478 u16 heads, beghead, endhead;
8e09f215
SW		 479 int rc = 0;
480
481 basepriv = (struct dasd_eckd_private *) basedev->private;
482 startpriv = (struct dasd_eckd_private *) startdev->private;
f3eb5384
SW		 483 dedata = &pfxdata->define_extent;
484 lredata = &pfxdata->locate_record;
8e09f215
SW		 485
486 ccw->cmd_code = DASD_ECKD_CCW_PFX;
487 ccw->flags = 0;
e4dbb0f2
SH		 488 if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) {
489 ccw->count = sizeof(*pfxdata) + 2;
490 ccw->cda = (__u32) __pa(pfxdata);
491 memset(pfxdata, 0, sizeof(*pfxdata) + 2);
492 } else {
493 ccw->count = sizeof(*pfxdata);
494 ccw->cda = (__u32) __pa(pfxdata);
495 memset(pfxdata, 0, sizeof(*pfxdata));
496 }
8e09f215 497
8e09f215 498 /* prefix data */
f3eb5384
SW		 499 if (format > 1) {
500 DBF_DEV_EVENT(DBF_ERR, basedev,
501 "PFX LRE unknown format 0x%x", format);
502 BUG();
503 return -EINVAL;
504 }
505 pfxdata->format = format;
4abb08c2
SW		 506 pfxdata->base_address = basepriv->ned->unit_addr;
507 pfxdata->base_lss = basepriv->ned->ID;
f3eb5384 508 pfxdata->validity.define_extent = 1;
8e09f215
SW		 509
510 /* private uid is kept up to date, conf_data may be outdated */
511 if (startpriv->uid.type != UA_BASE_DEVICE) {
512 pfxdata->validity.verify_base = 1;
513 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS)
514 pfxdata->validity.hyper_pav = 1;
515 }
516
517 /* define extend data (mostly)*/
518 switch (cmd) {
519 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
520 case DASD_ECKD_CCW_READ_RECORD_ZERO:
521 case DASD_ECKD_CCW_READ:
522 case DASD_ECKD_CCW_READ_MT:
523 case DASD_ECKD_CCW_READ_CKD:
524 case DASD_ECKD_CCW_READ_CKD_MT:
525 case DASD_ECKD_CCW_READ_KD:
526 case DASD_ECKD_CCW_READ_KD_MT:
527 case DASD_ECKD_CCW_READ_COUNT:
f3eb5384
SW		 528 dedata->mask.perm = 0x1;
529 dedata->attributes.operation = basepriv->attrib.operation;
530 break;
e4dbb0f2 531 case DASD_ECKD_CCW_READ_TRACK:
f3eb5384
SW		 532 case DASD_ECKD_CCW_READ_TRACK_DATA:
533 dedata->mask.perm = 0x1;
534 dedata->attributes.operation = basepriv->attrib.operation;
535 dedata->blk_size = 0;
8e09f215
SW		 536 break;
537 case DASD_ECKD_CCW_WRITE:
538 case DASD_ECKD_CCW_WRITE_MT:
539 case DASD_ECKD_CCW_WRITE_KD:
540 case DASD_ECKD_CCW_WRITE_KD_MT:
f3eb5384
SW		 541 dedata->mask.perm = 0x02;
542 dedata->attributes.operation = basepriv->attrib.operation;
8e09f215
SW		 543 rc = check_XRC_on_prefix(pfxdata, basedev);
544 break;
545 case DASD_ECKD_CCW_WRITE_CKD:
546 case DASD_ECKD_CCW_WRITE_CKD_MT:
f3eb5384 547 dedata->attributes.operation = DASD_BYPASS_CACHE;
8e09f215
SW		 548 rc = check_XRC_on_prefix(pfxdata, basedev);
549 break;
550 case DASD_ECKD_CCW_ERASE:
551 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
552 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
f3eb5384
SW		 553 dedata->mask.perm = 0x3;
554 dedata->mask.auth = 0x1;
555 dedata->attributes.operation = DASD_BYPASS_CACHE;
8e09f215
SW		 556 rc = check_XRC_on_prefix(pfxdata, basedev);
557 break;
e4dbb0f2
SH		 558 case DASD_ECKD_CCW_WRITE_FULL_TRACK:
559 dedata->mask.perm = 0x03;
560 dedata->attributes.operation = basepriv->attrib.operation;
561 dedata->blk_size = 0;
562 break;
f3eb5384
SW		 563 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
564 dedata->mask.perm = 0x02;
565 dedata->attributes.operation = basepriv->attrib.operation;
566 dedata->blk_size = blksize;
567 rc = check_XRC_on_prefix(pfxdata, basedev);
8e09f215 568 break;
f3eb5384
SW		 569 default:
570 DBF_DEV_EVENT(DBF_ERR, basedev,
571 "PFX LRE unknown opcode 0x%x", cmd);
572 BUG();
573 return -EINVAL;
8e09f215
SW		 574 }
575
f3eb5384 576 dedata->attributes.mode = 0x3; /* ECKD */
8e09f215
SW		 577
578 if ((basepriv->rdc_data.cu_type == 0x2105 ||
579 basepriv->rdc_data.cu_type == 0x2107 ||
580 basepriv->rdc_data.cu_type == 0x1750)
581 && !(basepriv->uses_cdl && trk < 2))
f3eb5384 582 dedata->ga_extended |= 0x40; /* Regular Data Format Mode */
8e09f215 583
b44b0ab3
SW		 584 heads = basepriv->rdc_data.trk_per_cyl;
585 begcyl = trk / heads;
586 beghead = trk % heads;
587 endcyl = totrk / heads;
588 endhead = totrk % heads;
8e09f215
SW		 589
590 /* check for sequential prestage - enhance cylinder range */
f3eb5384
SW		 591 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE ||
592 dedata->attributes.operation == DASD_SEQ_ACCESS) {
8e09f215 593
b44b0ab3
SW		 594 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl)
595 endcyl += basepriv->attrib.nr_cyl;
8e09f215 596 else
b44b0ab3 597 endcyl = (basepriv->real_cyl - 1);
8e09f215
SW		 598 }
599
f3eb5384
SW		 600 set_ch_t(&dedata->beg_ext, begcyl, beghead);
601 set_ch_t(&dedata->end_ext, endcyl, endhead);
602
603 if (format == 1) {
604 fill_LRE_data(lredata, trk, rec_on_trk, count, cmd,
605 basedev, blksize, tlf);
606 }
607
8e09f215
SW		 608 return rc;
609}
610
f3eb5384
SW		 611static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
612 unsigned int trk, unsigned int totrk, int cmd,
613 struct dasd_device *basedev, struct dasd_device *startdev)
614{
615 return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev,
616 0, 0, 0, 0, 0);
617}
618
4d284cac 619static void
b44b0ab3
SW		 620locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk,
621 unsigned int rec_on_trk, int no_rec, int cmd,
1da177e4
LT		 622 struct dasd_device * device, int reclen)
623{
624 struct dasd_eckd_private *private;
625 int sector;
626 int dn, d;
138c014d 627
1da177e4
LT		 628 private = (struct dasd_eckd_private *) device->private;
629
630 DBF_DEV_EVENT(DBF_INFO, device,
631 "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d",
632 trk, rec_on_trk, no_rec, cmd, reclen);
633
634 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD;
635 ccw->flags = 0;
636 ccw->count = 16;
637 ccw->cda = (__u32) __pa(data);
638
8e09f215 639 memset(data, 0, sizeof(struct LO_eckd_data));
1da177e4
LT		 640 sector = 0;
641 if (rec_on_trk) {
642 switch (private->rdc_data.dev_type) {
643 case 0x3390:
644 dn = ceil_quot(reclen + 6, 232);
645 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
646 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
647 break;
648 case 0x3380:
649 d = 7 + ceil_quot(reclen + 12, 32);
650 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
651 break;
652 }
653 }
654 data->sector = sector;
655 data->count = no_rec;
656 switch (cmd) {
657 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
658 data->operation.orientation = 0x3;
659 data->operation.operation = 0x03;
660 break;
661 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
662 data->operation.orientation = 0x3;
663 data->operation.operation = 0x16;
664 break;
665 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
666 data->operation.orientation = 0x1;
667 data->operation.operation = 0x03;
668 data->count++;
669 break;
670 case DASD_ECKD_CCW_READ_RECORD_ZERO:
671 data->operation.orientation = 0x3;
672 data->operation.operation = 0x16;
673 data->count++;
674 break;
675 case DASD_ECKD_CCW_WRITE:
676 case DASD_ECKD_CCW_WRITE_MT:
677 case DASD_ECKD_CCW_WRITE_KD:
678 case DASD_ECKD_CCW_WRITE_KD_MT:
679 data->auxiliary.last_bytes_used = 0x1;
680 data->length = reclen;
681 data->operation.operation = 0x01;
682 break;
683 case DASD_ECKD_CCW_WRITE_CKD:
684 case DASD_ECKD_CCW_WRITE_CKD_MT:
685 data->auxiliary.last_bytes_used = 0x1;
686 data->length = reclen;
687 data->operation.operation = 0x03;
688 break;
689 case DASD_ECKD_CCW_READ:
690 case DASD_ECKD_CCW_READ_MT:
691 case DASD_ECKD_CCW_READ_KD:
692 case DASD_ECKD_CCW_READ_KD_MT:
693 data->auxiliary.last_bytes_used = 0x1;
694 data->length = reclen;
695 data->operation.operation = 0x06;
696 break;
697 case DASD_ECKD_CCW_READ_CKD:
698 case DASD_ECKD_CCW_READ_CKD_MT:
699 data->auxiliary.last_bytes_used = 0x1;
700 data->length = reclen;
701 data->operation.operation = 0x16;
702 break;
703 case DASD_ECKD_CCW_READ_COUNT:
704 data->operation.operation = 0x06;
705 break;
706 case DASD_ECKD_CCW_ERASE:
707 data->length = reclen;
708 data->auxiliary.last_bytes_used = 0x1;
709 data->operation.operation = 0x0b;
710 break;
711 default:
fc19f381
SH		 712 DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record "
713 "opcode 0x%x", cmd);
1da177e4 714 }
b44b0ab3
SW		 715 set_ch_t(&data->seek_addr,
716 trk / private->rdc_data.trk_per_cyl,
717 trk % private->rdc_data.trk_per_cyl);
718 data->search_arg.cyl = data->seek_addr.cyl;
719 data->search_arg.head = data->seek_addr.head;
1da177e4
LT		 720 data->search_arg.record = rec_on_trk;
721}
722
723/*
724 * Returns 1 if the block is one of the special blocks that needs
725 * to get read/written with the KD variant of the command.
726 * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and
727 * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT.
728 * Luckily the KD variants differ only by one bit (0x08) from the
729 * normal variant. So don't wonder about code like:
730 * if (dasd_eckd_cdl_special(blk_per_trk, recid))
731 * ccw->cmd_code |= 0x8;
732 */
733static inline int
734dasd_eckd_cdl_special(int blk_per_trk, int recid)
735{
736 if (recid < 3)
737 return 1;
738 if (recid < blk_per_trk)
739 return 0;
740 if (recid < 2 * blk_per_trk)
741 return 1;
742 return 0;
743}
744
745/*
746 * Returns the record size for the special blocks of the cdl format.
747 * Only returns something useful if dasd_eckd_cdl_special is true
748 * for the recid.
749 */
750static inline int
751dasd_eckd_cdl_reclen(int recid)
752{
753 if (recid < 3)
754 return sizes_trk0[recid];
755 return LABEL_SIZE;
756}
b206181d
SH		 757/* create unique id from private structure. */
758static void create_uid(struct dasd_eckd_private *private)
3d052595 759{
4abb08c2 760 int count;
b206181d 761 struct dasd_uid *uid;
3d052595 762
2dedf0d9 763 uid = &private->uid;
3d052595 764 memset(uid, 0, sizeof(struct dasd_uid));
4abb08c2 765 memcpy(uid->vendor, private->ned->HDA_manufacturer,
d0710c7c 766 sizeof(uid->vendor) - 1);
3d052595 767 EBCASC(uid->vendor, sizeof(uid->vendor) - 1);
4abb08c2 768 memcpy(uid->serial, private->ned->HDA_location,
d0710c7c 769 sizeof(uid->serial) - 1);
3d052595 770 EBCASC(uid->serial, sizeof(uid->serial) - 1);
4abb08c2 771 uid->ssid = private->gneq->subsystemID;
a419aef8 772 uid->real_unit_addr = private->ned->unit_addr;
4abb08c2
SW		 773 if (private->sneq) {
774 uid->type = private->sneq->sua_flags;
8e09f215 775 if (uid->type == UA_BASE_PAV_ALIAS)
4abb08c2 776 uid->base_unit_addr = private->sneq->base_unit_addr;
8e09f215
SW		 777 } else {
778 uid->type = UA_BASE_DEVICE;
779 }
4abb08c2
SW		 780 if (private->vdsneq) {
781 for (count = 0; count < 16; count++) {
782 sprintf(uid->vduit+2*count, "%02x",
783 private->vdsneq->uit[count]);
784 }
785 }
b206181d
SH		 786}
787
788/*
789 * Generate device unique id that specifies the physical device.
790 */
791static int dasd_eckd_generate_uid(struct dasd_device *device)
792{
793 struct dasd_eckd_private *private;
794 unsigned long flags;
795
796 private = (struct dasd_eckd_private *) device->private;
797 if (!private)
798 return -ENODEV;
799 if (!private->ned || !private->gneq)
800 return -ENODEV;
801 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
802 create_uid(private);
2dedf0d9 803 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
3d052595
HH		 804 return 0;
805}
806
2dedf0d9
SH		 807static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid)
808{
809 struct dasd_eckd_private *private;
810 unsigned long flags;
811
812 if (device->private) {
813 private = (struct dasd_eckd_private *)device->private;
814 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
815 *uid = private->uid;
816 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
817 return 0;
818 }
819 return -EINVAL;
820}
821
b206181d
SH		 822/*
823 * compare device UID with data of a given dasd_eckd_private structure
824 * return 0 for match
825 */
826static int dasd_eckd_compare_path_uid(struct dasd_device *device,
827 struct dasd_eckd_private *private)
828{
829 struct dasd_uid device_uid;
830
831 create_uid(private);
832 dasd_eckd_get_uid(device, &device_uid);
833
834 return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid));
835}
836
a4d26c6a
SW		 837static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device,
838 struct dasd_ccw_req *cqr,
839 __u8 *rcd_buffer,
840 __u8 lpm)
17283b56 841{
17283b56 842 struct ccw1 *ccw;
a4d26c6a
SW		 843 /*
844 * buffer has to start with EBCDIC "V1.0" to show
845 * support for virtual device SNEQ
846 */
847 rcd_buffer[0] = 0xE5;
848 rcd_buffer[1] = 0xF1;
849 rcd_buffer[2] = 0x4B;
850 rcd_buffer[3] = 0xF0;
17283b56
CH		 851
852 ccw = cqr->cpaddr;
a4d26c6a
SW		 853 ccw->cmd_code = DASD_ECKD_CCW_RCD;
854 ccw->flags = 0;
17283b56 855 ccw->cda = (__u32)(addr_t)rcd_buffer;
a4d26c6a
SW		 856 ccw->count = DASD_ECKD_RCD_DATA_SIZE;
857 cqr->magic = DASD_ECKD_MAGIC;
17283b56 858
8e09f215
SW		 859 cqr->startdev = device;
860 cqr->memdev = device;
861 cqr->block = NULL;
17283b56
CH		 862 cqr->expires = 10*HZ;
863 cqr->lpm = lpm;
eb6e199b 864 cqr->retries = 256;
17283b56
CH		 865 cqr->buildclk = get_clock();
866 cqr->status = DASD_CQR_FILLED;
a4d26c6a
SW		 867 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags);
868}
869
5915a873
SH		 870/*
871 * Wakeup helper for read_conf
872 * if the cqr is not done and needs some error recovery
873 * the buffer has to be re-initialized with the EBCDIC "V1.0"
874 * to show support for virtual device SNEQ
875 */
876static void read_conf_cb(struct dasd_ccw_req *cqr, void *data)
877{
878 struct ccw1 *ccw;
879 __u8 *rcd_buffer;
880
881 if (cqr->status != DASD_CQR_DONE) {
882 ccw = cqr->cpaddr;
883 rcd_buffer = (__u8 *)((addr_t) ccw->cda);
884 memset(rcd_buffer, 0, sizeof(*rcd_buffer));
885
886 rcd_buffer[0] = 0xE5;
887 rcd_buffer[1] = 0xF1;
888 rcd_buffer[2] = 0x4B;
889 rcd_buffer[3] = 0xF0;
890 }
891 dasd_wakeup_cb(cqr, data);
892}
893
a4d26c6a
SW		 894static int dasd_eckd_read_conf_immediately(struct dasd_device *device,
895 struct dasd_ccw_req *cqr,
896 __u8 *rcd_buffer,
897 __u8 lpm)
898{
899 struct ciw *ciw;
900 int rc;
901 /*
902 * sanity check: scan for RCD command in extended SenseID data
903 * some devices do not support RCD
904 */
905 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
906 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD)
907 return -EOPNOTSUPP;
908
909 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm);
910 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
5a27e60d 911 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags);
a4d26c6a 912 cqr->retries = 5;
5915a873 913 cqr->callback = read_conf_cb;
a4d26c6a
SW		 914 rc = dasd_sleep_on_immediatly(cqr);
915 return rc;
17283b56
CH		 916}
917
918static int dasd_eckd_read_conf_lpm(struct dasd_device *device,
919 void **rcd_buffer,
920 int *rcd_buffer_size, __u8 lpm)
921{
922 struct ciw *ciw;
923 char *rcd_buf = NULL;
924 int ret;
925 struct dasd_ccw_req *cqr;
926
927 /*
a4d26c6a
SW		 928 * sanity check: scan for RCD command in extended SenseID data
929 * some devices do not support RCD
17283b56
CH		 930 */
931 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
a4d26c6a 932 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) {
17283b56
CH		 933 ret = -EOPNOTSUPP;
934 goto out_error;
935 }
a4d26c6a 936 rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA);
17283b56
CH		 937 if (!rcd_buf) {
938 ret = -ENOMEM;
939 goto out_error;
940 }
a4d26c6a
SW		 941 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */,
942 0, /* use rcd_buf as data ara */
943 device);
17283b56 944 if (IS_ERR(cqr)) {
a4d26c6a
SW		 945 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
946 "Could not allocate RCD request");
947 ret = -ENOMEM;
17283b56
CH		 948 goto out_error;
949 }
a4d26c6a 950 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm);
5915a873 951 cqr->callback = read_conf_cb;
17283b56
CH		 952 ret = dasd_sleep_on(cqr);
953 /*
954 * on success we update the user input parms
955 */
8e09f215 956 dasd_sfree_request(cqr, cqr->memdev);
17283b56
CH		 957 if (ret)
958 goto out_error;
959
a4d26c6a 960 *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE;
17283b56
CH		 961 *rcd_buffer = rcd_buf;
962 return 0;
963out_error:
964 kfree(rcd_buf);
965 *rcd_buffer = NULL;
966 *rcd_buffer_size = 0;
967 return ret;
968}
969
4abb08c2
SW		 970static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private)
971{
972
973 struct dasd_sneq *sneq;
974 int i, count;
975
976 private->ned = NULL;
977 private->sneq = NULL;
978 private->vdsneq = NULL;
979 private->gneq = NULL;
980 count = private->conf_len / sizeof(struct dasd_sneq);
981 sneq = (struct dasd_sneq *)private->conf_data;
982 for (i = 0; i < count; ++i) {
983 if (sneq->flags.identifier == 1 && sneq->format == 1)
984 private->sneq = sneq;
985 else if (sneq->flags.identifier == 1 && sneq->format == 4)
986 private->vdsneq = (struct vd_sneq *)sneq;
987 else if (sneq->flags.identifier == 2)
988 private->gneq = (struct dasd_gneq *)sneq;
989 else if (sneq->flags.identifier == 3 && sneq->res1 == 1)
990 private->ned = (struct dasd_ned *)sneq;
991 sneq++;
992 }
993 if (!private->ned || !private->gneq) {
994 private->ned = NULL;
995 private->sneq = NULL;
996 private->vdsneq = NULL;
997 private->gneq = NULL;
998 return -EINVAL;
999 }
1000 return 0;
1001
1002};
1003
1004static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len)
1005{
1006 struct dasd_gneq *gneq;
1007 int i, count, found;
1008
1009 count = conf_len / sizeof(*gneq);
1010 gneq = (struct dasd_gneq *)conf_data;
1011 found = 0;
1012 for (i = 0; i < count; ++i) {
1013 if (gneq->flags.identifier == 2) {
1014 found = 1;
1015 break;
1016 }
1017 gneq++;
1018 }
1019 if (found)
1020 return ((char *)gneq)[18] & 0x07;
1021 else
1022 return 0;
1023}
1024
1025static int dasd_eckd_read_conf(struct dasd_device *device)
1da177e4
LT		 1026{
1027 void *conf_data;
1028 int conf_len, conf_data_saved;
1029 int rc;
a4d26c6a 1030 __u8 lpm, opm;
b206181d 1031 struct dasd_eckd_private *private, path_private;
a4d26c6a 1032 struct dasd_path *path_data;
b206181d
SH		 1033 struct dasd_uid *uid;
1034 char print_path_uid[60], print_device_uid[60];
1da177e4
LT		 1035
1036 private = (struct dasd_eckd_private *) device->private;
a4d26c6a
SW		 1037 path_data = &device->path_data;
1038 opm = ccw_device_get_path_mask(device->cdev);
1da177e4 1039 conf_data_saved = 0;
1da177e4
LT		 1040 /* get configuration data per operational path */
1041 for (lpm = 0x80; lpm; lpm>>= 1) {
b206181d
SH		 1042 if (!(lpm & opm))
1043 continue;
1044 rc = dasd_eckd_read_conf_lpm(device, &conf_data,
1045 &conf_len, lpm);
1046 if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */
1047 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1048 "Read configuration data returned "
1049 "error %d", rc);
1050 return rc;
1051 }
1052 if (conf_data == NULL) {
1053 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1054 "No configuration data "
1055 "retrieved");
1056 /* no further analysis possible */
1057 path_data->opm |= lpm;
1058 continue; /* no error */
1059 }
1060 /* save first valid configuration data */
1061 if (!conf_data_saved) {
1062 kfree(private->conf_data);
1063 private->conf_data = conf_data;
1064 private->conf_len = conf_len;
1065 if (dasd_eckd_identify_conf_parts(private)) {
1066 private->conf_data = NULL;
1067 private->conf_len = 0;
1068 kfree(conf_data);
1069 continue;
1da177e4 1070 }
b206181d
SH		 1071 /*
1072 * build device UID that other path data
1073 * can be compared to it
1074 */
1075 dasd_eckd_generate_uid(device);
1076 conf_data_saved++;
1077 } else {
1078 path_private.conf_data = conf_data;
1079 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE;
1080 if (dasd_eckd_identify_conf_parts(
1081 &path_private)) {
1082 path_private.conf_data = NULL;
1083 path_private.conf_len = 0;
1084 kfree(conf_data);
1085 continue;
1da177e4 1086 }
b206181d
SH		 1087
1088 if (dasd_eckd_compare_path_uid(
1089 device, &path_private)) {
1090 uid = &path_private.uid;
1091 if (strlen(uid->vduit) > 0)
1092 snprintf(print_path_uid,
1093 sizeof(print_path_uid),
1094 "%s.%s.%04x.%02x.%s",
1095 uid->vendor, uid->serial,
1096 uid->ssid, uid->real_unit_addr,
1097 uid->vduit);
1098 else
1099 snprintf(print_path_uid,
1100 sizeof(print_path_uid),
1101 "%s.%s.%04x.%02x",
1102 uid->vendor, uid->serial,
1103 uid->ssid,
1104 uid->real_unit_addr);
1105 uid = &private->uid;
1106 if (strlen(uid->vduit) > 0)
1107 snprintf(print_device_uid,
1108 sizeof(print_device_uid),
1109 "%s.%s.%04x.%02x.%s",
1110 uid->vendor, uid->serial,
1111 uid->ssid, uid->real_unit_addr,
1112 uid->vduit);
1113 else
1114 snprintf(print_device_uid,
1115 sizeof(print_device_uid),
1116 "%s.%s.%04x.%02x",
1117 uid->vendor, uid->serial,
1118 uid->ssid,
1119 uid->real_unit_addr);
1120 dev_err(&device->cdev->dev,
1121 "Not all channel paths lead to "
1122 "the same device, path %02X leads to "
1123 "device %s instead of %s\n", lpm,
1124 print_path_uid, print_device_uid);
1125 return -EINVAL;
1da177e4 1126 }
b206181d
SH		 1127
1128 path_private.conf_data = NULL;
1129 path_private.conf_len = 0;
1130 }
1131 switch (dasd_eckd_path_access(conf_data, conf_len)) {
1132 case 0x02:
1133 path_data->npm |= lpm;
1134 break;
1135 case 0x03:
1136 path_data->ppm |= lpm;
1137 break;
1da177e4 1138 }
b206181d
SH		 1139 path_data->opm |= lpm;
1140
1141 if (conf_data != private->conf_data)
1142 kfree(conf_data);
1da177e4 1143 }
b206181d 1144
1da177e4
LT		 1145 return 0;
1146}
1147
a4d26c6a
SW		 1148static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm)
1149{
1150 struct dasd_eckd_private *private;
1151 int mdc;
1152 u32 fcx_max_data;
1153
1154 private = (struct dasd_eckd_private *) device->private;
1155 if (private->fcx_max_data) {
1156 mdc = ccw_device_get_mdc(device->cdev, lpm);
1157 if ((mdc < 0)) {
1158 dev_warn(&device->cdev->dev,
1159 "Detecting the maximum data size for zHPF "
1160 "requests failed (rc=%d) for a new path %x\n",
1161 mdc, lpm);
1162 return mdc;
1163 }
1164 fcx_max_data = mdc * FCX_MAX_DATA_FACTOR;
1165 if (fcx_max_data < private->fcx_max_data) {
1166 dev_warn(&device->cdev->dev,
1167 "The maximum data size for zHPF requests %u "
1168 "on a new path %x is below the active maximum "
1169 "%u\n", fcx_max_data, lpm,
1170 private->fcx_max_data);
1171 return -EACCES;
1172 }
1173 }
1174 return 0;
1175}
1176
b206181d
SH		 1177static int rebuild_device_uid(struct dasd_device *device,
1178 struct path_verification_work_data *data)
1179{
1180 struct dasd_eckd_private *private;
1181 struct dasd_path *path_data;
1182 __u8 lpm, opm;
1183 int rc;
1184
1185 rc = -ENODEV;
1186 private = (struct dasd_eckd_private *) device->private;
1187 path_data = &device->path_data;
1188 opm = device->path_data.opm;
1189
1190 for (lpm = 0x80; lpm; lpm >>= 1) {
1191 if (!(lpm & opm))
1192 continue;
1193 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer));
1194 memset(&data->cqr, 0, sizeof(data->cqr));
1195 data->cqr.cpaddr = &data->ccw;
1196 rc = dasd_eckd_read_conf_immediately(device, &data->cqr,
1197 data->rcd_buffer,
1198 lpm);
1199
1200 if (rc) {
1201 if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */
1202 continue;
1203 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1204 "Read configuration data "
1205 "returned error %d", rc);
1206 break;
1207 }
1208 memcpy(private->conf_data, data->rcd_buffer,
1209 DASD_ECKD_RCD_DATA_SIZE);
1210 if (dasd_eckd_identify_conf_parts(private)) {
1211 rc = -ENODEV;
1212 } else /* first valid path is enough */
1213 break;
1214 }
1215
1216 if (!rc)
1217 rc = dasd_eckd_generate_uid(device);
1218
1219 return rc;
1220}
1221
a4d26c6a
SW		 1222static void do_path_verification_work(struct work_struct *work)
1223{
1224 struct path_verification_work_data *data;
1225 struct dasd_device *device;
b206181d
SH		 1226 struct dasd_eckd_private path_private;
1227 struct dasd_uid *uid;
1228 __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE];
a4d26c6a
SW		 1229 __u8 lpm, opm, npm, ppm, epm;
1230 unsigned long flags;
b206181d 1231 char print_uid[60];
a4d26c6a
SW		 1232 int rc;
1233
1234 data = container_of(work, struct path_verification_work_data, worker);
1235 device = data->device;
1236
c8d1c0ff
SH		 1237 /* delay path verification until device was resumed */
1238 if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) {
1239 schedule_work(work);
1240 return;
1241 }
1242
a4d26c6a
SW		 1243 opm = 0;
1244 npm = 0;
1245 ppm = 0;
1246 epm = 0;
1247 for (lpm = 0x80; lpm; lpm >>= 1) {
b206181d
SH		 1248 if (!(lpm & data->tbvpm))
1249 continue;
1250 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer));
1251 memset(&data->cqr, 0, sizeof(data->cqr));
1252 data->cqr.cpaddr = &data->ccw;
1253 rc = dasd_eckd_read_conf_immediately(device, &data->cqr,
1254 data->rcd_buffer,
1255 lpm);
1256 if (!rc) {
1257 switch (dasd_eckd_path_access(data->rcd_buffer,
1258 DASD_ECKD_RCD_DATA_SIZE)
1259 ) {
1260 case 0x02:
1261 npm |= lpm;
1262 break;
1263 case 0x03:
1264 ppm |= lpm;
1265 break;
1266 }
1267 opm |= lpm;
1268 } else if (rc == -EOPNOTSUPP) {
1269 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1270 "path verification: No configuration "
1271 "data retrieved");
1272 opm |= lpm;
1273 } else if (rc == -EAGAIN) {
1274 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
a4d26c6a
SW		 1275 "path verification: device is stopped,"
1276 " try again later");
b206181d
SH		 1277 epm |= lpm;
1278 } else {
1279 dev_warn(&device->cdev->dev,
1280 "Reading device feature codes failed "
1281 "(rc=%d) for new path %x\n", rc, lpm);
1282 continue;
1283 }
1284 if (verify_fcx_max_data(device, lpm)) {
1285 opm &= ~lpm;
1286 npm &= ~lpm;
1287 ppm &= ~lpm;
1288 continue;
1289 }
1290
1291 /*
1292 * save conf_data for comparison after
1293 * rebuild_device_uid may have changed
1294 * the original data
1295 */
1296 memcpy(&path_rcd_buf, data->rcd_buffer,
1297 DASD_ECKD_RCD_DATA_SIZE);
1298 path_private.conf_data = (void *) &path_rcd_buf;
1299 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE;
1300 if (dasd_eckd_identify_conf_parts(&path_private)) {
1301 path_private.conf_data = NULL;
1302 path_private.conf_len = 0;
1303 continue;
1304 }
1305
1306 /*
1307 * compare path UID with device UID only if at least
1308 * one valid path is left
1309 * in other case the device UID may have changed and
1310 * the first working path UID will be used as device UID
1311 */
1312 if (device->path_data.opm &&
1313 dasd_eckd_compare_path_uid(device, &path_private)) {
1314 /*
1315 * the comparison was not successful
1316 * rebuild the device UID with at least one
1317 * known path in case a z/VM hyperswap command
1318 * has changed the device
1319 *
1320 * after this compare again
1321 *
1322 * if either the rebuild or the recompare fails
1323 * the path can not be used
1324 */
1325 if (rebuild_device_uid(device, data) ||
1326 dasd_eckd_compare_path_uid(
1327 device, &path_private)) {
1328 uid = &path_private.uid;
1329 if (strlen(uid->vduit) > 0)
1330 snprintf(print_uid, sizeof(print_uid),
1331 "%s.%s.%04x.%02x.%s",
1332 uid->vendor, uid->serial,
1333 uid->ssid, uid->real_unit_addr,
1334 uid->vduit);
1335 else
1336 snprintf(print_uid, sizeof(print_uid),
1337 "%s.%s.%04x.%02x",
1338 uid->vendor, uid->serial,
1339 uid->ssid,
1340 uid->real_unit_addr);
1341 dev_err(&device->cdev->dev,
1342 "The newly added channel path %02X "
1343 "will not be used because it leads "
1344 "to a different device %s\n",
1345 lpm, print_uid);
a4d26c6a
SW		 1346 opm &= ~lpm;
1347 npm &= ~lpm;
1348 ppm &= ~lpm;
b206181d 1349 continue;
a4d26c6a
SW		 1350 }
1351 }
b206181d
SH		 1352
1353 /*
1354 * There is a small chance that a path is lost again between
1355 * above path verification and the following modification of
1356 * the device opm mask. We could avoid that race here by using
1357 * yet another path mask, but we rather deal with this unlikely
1358 * situation in dasd_start_IO.
1359 */
1360 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
1361 if (!device->path_data.opm && opm) {
1362 device->path_data.opm = opm;
1363 dasd_generic_path_operational(device);
1364 } else
1365 device->path_data.opm |= opm;
1366 device->path_data.npm |= npm;
1367 device->path_data.ppm |= ppm;
1368 device->path_data.tbvpm |= epm;
1369 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
a4d26c6a 1370 }
a4d26c6a
SW		 1371
1372 dasd_put_device(device);
1373 if (data->isglobal)
1374 mutex_unlock(&dasd_path_verification_mutex);
1375 else
1376 kfree(data);
1377}
1378
1379static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm)
1380{
1381 struct path_verification_work_data *data;
1382
1383 data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA);
1384 if (!data) {
1385 if (mutex_trylock(&dasd_path_verification_mutex)) {
1386 data = path_verification_worker;
1387 data->isglobal = 1;
1388 } else
1389 return -ENOMEM;
1390 } else {
1391 memset(data, 0, sizeof(*data));
1392 data->isglobal = 0;
1393 }
1394 INIT_WORK(&data->worker, do_path_verification_work);
1395 dasd_get_device(device);
1396 data->device = device;
1397 data->tbvpm = lpm;
1398 schedule_work(&data->worker);
1399 return 0;
1400}
1401
8e09f215
SW		 1402static int dasd_eckd_read_features(struct dasd_device *device)
1403{
1404 struct dasd_psf_prssd_data *prssdp;
1405 struct dasd_rssd_features *features;
1406 struct dasd_ccw_req *cqr;
1407 struct ccw1 *ccw;
1408 int rc;
1409 struct dasd_eckd_private *private;
1410
1411 private = (struct dasd_eckd_private *) device->private;
68d1e5f0 1412 memset(&private->features, 0, sizeof(struct dasd_rssd_features));
68b781fe 1413 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
8e09f215
SW		 1414 (sizeof(struct dasd_psf_prssd_data) +
1415 sizeof(struct dasd_rssd_features)),
1416 device);
1417 if (IS_ERR(cqr)) {
b8ed5dd5
SH		 1418 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not "
1419 "allocate initialization request");
8e09f215
SW		 1420 return PTR_ERR(cqr);
1421 }
1422 cqr->startdev = device;
1423 cqr->memdev = device;
1424 cqr->block = NULL;
eb6e199b 1425 cqr->retries = 256;
8e09f215
SW		 1426 cqr->expires = 10 * HZ;
1427
1428 /* Prepare for Read Subsystem Data */
1429 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
1430 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
1431 prssdp->order = PSF_ORDER_PRSSD;
1432 prssdp->suborder = 0x41; /* Read Feature Codes */
1433 /* all other bytes of prssdp must be zero */
1434
1435 ccw = cqr->cpaddr;
1436 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1437 ccw->count = sizeof(struct dasd_psf_prssd_data);
1438 ccw->flags |= CCW_FLAG_CC;
1439 ccw->cda = (__u32)(addr_t) prssdp;
1440
1441 /* Read Subsystem Data - feature codes */
1442 features = (struct dasd_rssd_features *) (prssdp + 1);
1443 memset(features, 0, sizeof(struct dasd_rssd_features));
1444
1445 ccw++;
1446 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
1447 ccw->count = sizeof(struct dasd_rssd_features);
1448 ccw->cda = (__u32)(addr_t) features;
1449
1450 cqr->buildclk = get_clock();
1451 cqr->status = DASD_CQR_FILLED;
1452 rc = dasd_sleep_on(cqr);
1453 if (rc == 0) {
1454 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
1455 features = (struct dasd_rssd_features *) (prssdp + 1);
1456 memcpy(&private->features, features,
1457 sizeof(struct dasd_rssd_features));
68d1e5f0
SW		 1458 } else
1459 dev_warn(&device->cdev->dev, "Reading device feature codes"
1460 " failed with rc=%d\n", rc);
8e09f215
SW		 1461 dasd_sfree_request(cqr, cqr->memdev);
1462 return rc;
1463}
1464
1465
40545573
HH		 1466/*
1467 * Build CP for Perform Subsystem Function - SSC.
1468 */
f3eb5384
SW		 1469static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device,
1470 int enable_pav)
40545573 1471{
8e09f215
SW		 1472 struct dasd_ccw_req *cqr;
1473 struct dasd_psf_ssc_data *psf_ssc_data;
1474 struct ccw1 *ccw;
40545573 1475
68b781fe 1476 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ ,
40545573
HH		 1477 sizeof(struct dasd_psf_ssc_data),
1478 device);
1479
8e09f215 1480 if (IS_ERR(cqr)) {
fc19f381 1481 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
40545573 1482 "Could not allocate PSF-SSC request");
8e09f215
SW		 1483 return cqr;
1484 }
1485 psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data;
1486 psf_ssc_data->order = PSF_ORDER_SSC;
626350b6 1487 psf_ssc_data->suborder = 0xc0;
f3eb5384 1488 if (enable_pav) {
626350b6 1489 psf_ssc_data->suborder |= 0x08;
f3eb5384
SW		 1490 psf_ssc_data->reserved[0] = 0x88;
1491 }
8e09f215
SW		 1492 ccw = cqr->cpaddr;
1493 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1494 ccw->cda = (__u32)(addr_t)psf_ssc_data;
1495 ccw->count = 66;
1496
1497 cqr->startdev = device;
1498 cqr->memdev = device;
1499 cqr->block = NULL;
eb6e199b 1500 cqr->retries = 256;
8e09f215
SW		 1501 cqr->expires = 10*HZ;
1502 cqr->buildclk = get_clock();
1503 cqr->status = DASD_CQR_FILLED;
1504 return cqr;
40545573
HH		 1505}
1506
1507/*
1508 * Perform Subsystem Function.
1509 * It is necessary to trigger CIO for channel revalidation since this
1510 * call might change behaviour of DASD devices.
1511 */
1512static int
12d7b107
SH		 1513dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav,
1514 unsigned long flags)
40545573 1515{
8e09f215
SW		 1516 struct dasd_ccw_req *cqr;
1517 int rc;
1518
f3eb5384 1519 cqr = dasd_eckd_build_psf_ssc(device, enable_pav);
8e09f215
SW		 1520 if (IS_ERR(cqr))
1521 return PTR_ERR(cqr);
1522
12d7b107
SH		 1523 /*
1524 * set flags e.g. turn on failfast, to prevent blocking
1525 * the calling function should handle failed requests
1526 */
1527 cqr->flags |= flags;
1528
8e09f215
SW		 1529 rc = dasd_sleep_on(cqr);
1530 if (!rc)
1531 /* trigger CIO to reprobe devices */
1532 css_schedule_reprobe();
12d7b107
SH		 1533 else if (cqr->intrc == -EAGAIN)
1534 rc = -EAGAIN;
1535
8e09f215
SW		 1536 dasd_sfree_request(cqr, cqr->memdev);
1537 return rc;
40545573
HH		 1538}
1539
1540/*
1541 * Valide storage server of current device.
1542 */
12d7b107
SH		 1543static int dasd_eckd_validate_server(struct dasd_device *device,
1544 unsigned long flags)
40545573
HH		 1545{
1546 int rc;
8e09f215 1547 struct dasd_eckd_private *private;
f3eb5384 1548 int enable_pav;
40545573 1549
f9f8d02f
SH		 1550 private = (struct dasd_eckd_private *) device->private;
1551 if (private->uid.type == UA_BASE_PAV_ALIAS ||
1552 private->uid.type == UA_HYPER_PAV_ALIAS)
12d7b107 1553 return 0;
40545573 1554 if (dasd_nopav || MACHINE_IS_VM)
f3eb5384
SW		 1555 enable_pav = 0;
1556 else
1557 enable_pav = 1;
12d7b107 1558 rc = dasd_eckd_psf_ssc(device, enable_pav, flags);
eb6e199b 1559
8e79a441
HH		 1560 /* may be requested feature is not available on server,
1561 * therefore just report error and go ahead */
b8ed5dd5
SH		 1562 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x "
1563 "returned rc=%d", private->uid.ssid, rc);
12d7b107 1564 return rc;
40545573
HH		 1565}
1566
f1633031
SH		 1567/*
1568 * worker to do a validate server in case of a lost pathgroup
1569 */
1570static void dasd_eckd_do_validate_server(struct work_struct *work)
1571{
1572 struct dasd_device *device = container_of(work, struct dasd_device,
1573 kick_validate);
12d7b107
SH		 1574 if (dasd_eckd_validate_server(device, DASD_CQR_FLAGS_FAILFAST)
1575 == -EAGAIN) {
1576 /* schedule worker again if failed */
1577 schedule_work(&device->kick_validate);
1578 return;
1579 }
1580
f1633031
SH		 1581 dasd_put_device(device);
1582}
1583
1584static void dasd_eckd_kick_validate_server(struct dasd_device *device)
1585{
1586 dasd_get_device(device);
25e2cf1c
SH		 1587 /* exit if device not online or in offline processing */
1588 if (test_bit(DASD_FLAG_OFFLINE, &device->flags) ||
1589 device->state < DASD_STATE_ONLINE) {
1590 dasd_put_device(device);
1591 return;
1592 }
f1633031
SH		 1593 /* queue call to do_validate_server to the kernel event daemon. */
1594 schedule_work(&device->kick_validate);
1595}
1596
ef19298b
SW		 1597static u32 get_fcx_max_data(struct dasd_device *device)
1598{
1599#if defined(CONFIG_64BIT)
1600 int tpm, mdc;
1601 int fcx_in_css, fcx_in_gneq, fcx_in_features;
1602 struct dasd_eckd_private *private;
1603
1604 if (dasd_nofcx)
1605 return 0;
1606 /* is transport mode supported? */
1607 private = (struct dasd_eckd_private *) device->private;
1608 fcx_in_css = css_general_characteristics.fcx;
1609 fcx_in_gneq = private->gneq->reserved2[7] & 0x04;
1610 fcx_in_features = private->features.feature[40] & 0x80;
1611 tpm = fcx_in_css && fcx_in_gneq && fcx_in_features;
1612
1613 if (!tpm)
1614 return 0;
1615
1616 mdc = ccw_device_get_mdc(device->cdev, 0);
1617 if (mdc < 0) {
1618 dev_warn(&device->cdev->dev, "Detecting the maximum supported"
1619 " data size for zHPF requests failed\n");
1620 return 0;
1621 } else
1622 return mdc * FCX_MAX_DATA_FACTOR;
1623#else
1624 return 0;
1625#endif
1626}
1627
3d052595
HH		 1628/*
1629 * Check device characteristics.
1630 * If the device is accessible using ECKD discipline, the device is enabled.
1631 */
1da177e4
LT		 1632static int
1633dasd_eckd_check_characteristics(struct dasd_device *device)
1634{
1635 struct dasd_eckd_private *private;
8e09f215 1636 struct dasd_block *block;
2dedf0d9 1637 struct dasd_uid temp_uid;
f9f8d02f 1638 int rc, i;
33b62a30 1639 int readonly;
7c8faa86 1640 unsigned long value;
1da177e4 1641
f1633031
SH		 1642 /* setup work queue for validate server*/
1643 INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server);
1644
454e1fa1
PO		 1645 if (!ccw_device_is_pathgroup(device->cdev)) {
1646 dev_warn(&device->cdev->dev,
1647 "A channel path group could not be established\n");
1648 return -EIO;
1649 }
1650 if (!ccw_device_is_multipath(device->cdev)) {
1651 dev_info(&device->cdev->dev,
1652 "The DASD is not operating in multipath mode\n");
1653 }
1da177e4 1654 private = (struct dasd_eckd_private *) device->private;
92636b15
SO		 1655 if (!private) {
1656 private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA);
1657 if (!private) {
fc19f381
SH		 1658 dev_warn(&device->cdev->dev,
1659 "Allocating memory for private DASD data "
1660 "failed\n");
1da177e4
LT		 1661 return -ENOMEM;
1662 }
1da177e4 1663 device->private = (void *) private;
92636b15
SO		 1664 } else {
1665 memset(private, 0, sizeof(*private));
1da177e4
LT		 1666 }
1667 /* Invalidate status of initial analysis. */
1668 private->init_cqr_status = -1;
1669 /* Set default cache operations. */
1670 private->attrib.operation = DASD_NORMAL_CACHE;
1671 private->attrib.nr_cyl = 0;
1672
40545573
HH		 1673 /* Read Configuration Data */
1674 rc = dasd_eckd_read_conf(device);
1675 if (rc)
8e09f215 1676 goto out_err1;
40545573 1677
7c8faa86
SH		 1678 /* set default timeout */
1679 device->default_expires = DASD_EXPIRES;
1680 if (private->gneq) {
1681 value = 1;
1682 for (i = 0; i < private->gneq->timeout.value; i++)
1683 value = 10 * value;
1684 value = value * private->gneq->timeout.number;
1685 /* do not accept useless values */
1686 if (value != 0 && value <= DASD_EXPIRES_MAX)
1687 device->default_expires = value;
1688 }
1689
2dedf0d9
SH		 1690 dasd_eckd_get_uid(device, &temp_uid);
1691 if (temp_uid.type == UA_BASE_DEVICE) {
8e09f215
SW		 1692 block = dasd_alloc_block();
1693 if (IS_ERR(block)) {
b8ed5dd5
SH		 1694 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1695 "could not allocate dasd "
1696 "block structure");
8e09f215
SW		 1697 rc = PTR_ERR(block);
1698 goto out_err1;
1699 }
1700 device->block = block;
1701 block->base = device;
1702 }
1703
f9f8d02f
SH		 1704 /* register lcu with alias handling, enable PAV */
1705 rc = dasd_alias_make_device_known_to_lcu(device);
1706 if (rc)
8e09f215 1707 goto out_err2;
f9f8d02f 1708
12d7b107 1709 dasd_eckd_validate_server(device, 0);
f4ac1d02
SW		 1710
1711 /* device may report different configuration data after LCU setup */
1712 rc = dasd_eckd_read_conf(device);
1713 if (rc)
1714 goto out_err3;
8e09f215
SW		 1715
1716 /* Read Feature Codes */
68d1e5f0 1717 dasd_eckd_read_features(device);
40545573 1718
1da177e4 1719 /* Read Device Characteristics */
68b781fe
SH		 1720 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
1721 &private->rdc_data, 64);
8e09f215 1722 if (rc) {
b8ed5dd5
SH		 1723 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1724 "Read device characteristic failed, rc=%d", rc);
8e09f215
SW		 1725 goto out_err3;
1726 }
34cd551a
SH		 1727
1728 if ((device->features & DASD_FEATURE_USERAW) &&
1729 !(private->rdc_data.facilities.RT_in_LR)) {
1730 dev_err(&device->cdev->dev, "The storage server does not "
1731 "support raw-track access\n");
1732 rc = -EINVAL;
1733 goto out_err3;
1734 }
1735
817f2c84 1736 /* find the valid cylinder size */
b44b0ab3
SW		 1737 if (private->rdc_data.no_cyl == LV_COMPAT_CYL &&
1738 private->rdc_data.long_no_cyl)
1739 private->real_cyl = private->rdc_data.long_no_cyl;
1740 else
1741 private->real_cyl = private->rdc_data.no_cyl;
1742
ef19298b
SW		 1743 private->fcx_max_data = get_fcx_max_data(device);
1744
33b62a30
SW		 1745 readonly = dasd_device_is_ro(device);
1746 if (readonly)
1747 set_bit(DASD_FLAG_DEVICE_RO, &device->flags);
1748
fc19f381 1749 dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) "
33b62a30 1750 "with %d cylinders, %d heads, %d sectors%s\n",
fc19f381
SH		 1751 private->rdc_data.dev_type,
1752 private->rdc_data.dev_model,
1753 private->rdc_data.cu_type,
1754 private->rdc_data.cu_model.model,
92636b15 1755 private->real_cyl,
fc19f381 1756 private->rdc_data.trk_per_cyl,
33b62a30
SW		 1757 private->rdc_data.sec_per_trk,
1758 readonly ? ", read-only device" : "");
8e09f215
SW		 1759 return 0;
1760
1761out_err3:
1762 dasd_alias_disconnect_device_from_lcu(device);
1763out_err2:
1764 dasd_free_block(device->block);
1765 device->block = NULL;
1766out_err1:
4abb08c2 1767 kfree(private->conf_data);
8e09f215
SW		 1768 kfree(device->private);
1769 device->private = NULL;
3d052595 1770 return rc;
1da177e4
LT		 1771}
1772
8e09f215
SW		 1773static void dasd_eckd_uncheck_device(struct dasd_device *device)
1774{
4abb08c2
SW		 1775 struct dasd_eckd_private *private;
1776
1777 private = (struct dasd_eckd_private *) device->private;
8e09f215 1778 dasd_alias_disconnect_device_from_lcu(device);
4abb08c2
SW		 1779 private->ned = NULL;
1780 private->sneq = NULL;
1781 private->vdsneq = NULL;
1782 private->gneq = NULL;
1783 private->conf_len = 0;
1784 kfree(private->conf_data);
1785 private->conf_data = NULL;
8e09f215
SW		 1786}
1787
1da177e4
LT		 1788static struct dasd_ccw_req *
1789dasd_eckd_analysis_ccw(struct dasd_device *device)
1790{
1791 struct dasd_eckd_private *private;
1792 struct eckd_count *count_data;
1793 struct LO_eckd_data *LO_data;
1794 struct dasd_ccw_req *cqr;
1795 struct ccw1 *ccw;
1796 int cplength, datasize;
1797 int i;
1798
1799 private = (struct dasd_eckd_private *) device->private;
1800
1801 cplength = 8;
1802 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data);
68b781fe 1803 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device);
1da177e4
LT		 1804 if (IS_ERR(cqr))
1805 return cqr;
1806 ccw = cqr->cpaddr;
1807 /* Define extent for the first 3 tracks. */
1808 define_extent(ccw++, cqr->data, 0, 2,
1809 DASD_ECKD_CCW_READ_COUNT, device);
8e09f215 1810 LO_data = cqr->data + sizeof(struct DE_eckd_data);
1da177e4
LT		 1811 /* Locate record for the first 4 records on track 0. */
1812 ccw[-1].flags |= CCW_FLAG_CC;
1813 locate_record(ccw++, LO_data++, 0, 0, 4,
1814 DASD_ECKD_CCW_READ_COUNT, device, 0);
1815
1816 count_data = private->count_area;
1817 for (i = 0; i < 4; i++) {
1818 ccw[-1].flags |= CCW_FLAG_CC;
1819 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1820 ccw->flags = 0;
1821 ccw->count = 8;
1822 ccw->cda = (__u32)(addr_t) count_data;
1823 ccw++;
1824 count_data++;
1825 }
1826
1827 /* Locate record for the first record on track 2. */
1828 ccw[-1].flags |= CCW_FLAG_CC;
1829 locate_record(ccw++, LO_data++, 2, 0, 1,
1830 DASD_ECKD_CCW_READ_COUNT, device, 0);
1831 /* Read count ccw. */
1832 ccw[-1].flags |= CCW_FLAG_CC;
1833 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1834 ccw->flags = 0;
1835 ccw->count = 8;
1836 ccw->cda = (__u32)(addr_t) count_data;
1837
8e09f215
SW		 1838 cqr->block = NULL;
1839 cqr->startdev = device;
1840 cqr->memdev = device;
eb6e199b 1841 cqr->retries = 255;
1da177e4
LT		 1842 cqr->buildclk = get_clock();
1843 cqr->status = DASD_CQR_FILLED;
1844 return cqr;
1845}
1846
eb6e199b
SW		 1847/* differentiate between 'no record found' and any other error */
1848static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr)
1849{
1850 char *sense;
1851 if (init_cqr->status == DASD_CQR_DONE)
1852 return INIT_CQR_OK;
1853 else if (init_cqr->status == DASD_CQR_NEED_ERP ||
1854 init_cqr->status == DASD_CQR_FAILED) {
1855 sense = dasd_get_sense(&init_cqr->irb);
1856 if (sense && (sense[1] & SNS1_NO_REC_FOUND))
1857 return INIT_CQR_UNFORMATTED;
1858 else
1859 return INIT_CQR_ERROR;
1860 } else
1861 return INIT_CQR_ERROR;
1862}
1863
1da177e4
LT		 1864/*
1865 * This is the callback function for the init_analysis cqr. It saves
1866 * the status of the initial analysis ccw before it frees it and kicks
1867 * the device to continue the startup sequence. This will call
1868 * dasd_eckd_do_analysis again (if the devices has not been marked
1869 * for deletion in the meantime).
1870 */
eb6e199b
SW		 1871static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr,
1872 void *data)
1da177e4
LT		 1873{
1874 struct dasd_eckd_private *private;
1875 struct dasd_device *device;
1876
8e09f215 1877 device = init_cqr->startdev;
1da177e4 1878 private = (struct dasd_eckd_private *) device->private;
eb6e199b 1879 private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr);
1da177e4
LT		 1880 dasd_sfree_request(init_cqr, device);
1881 dasd_kick_device(device);
1882}
1883
eb6e199b 1884static int dasd_eckd_start_analysis(struct dasd_block *block)
1da177e4 1885{
1da177e4
LT		 1886 struct dasd_ccw_req *init_cqr;
1887
8e09f215 1888 init_cqr = dasd_eckd_analysis_ccw(block->base);
1da177e4
LT		 1889 if (IS_ERR(init_cqr))
1890 return PTR_ERR(init_cqr);
1891 init_cqr->callback = dasd_eckd_analysis_callback;
1892 init_cqr->callback_data = NULL;
1893 init_cqr->expires = 5*HZ;
eb6e199b
SW		 1894 /* first try without ERP, so we can later handle unformatted
1895 * devices as special case
1896 */
1897 clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags);
1898 init_cqr->retries = 0;
1da177e4
LT		 1899 dasd_add_request_head(init_cqr);
1900 return -EAGAIN;
1901}
1902
eb6e199b 1903static int dasd_eckd_end_analysis(struct dasd_block *block)
1da177e4 1904{
8e09f215 1905 struct dasd_device *device;
1da177e4
LT		 1906 struct dasd_eckd_private *private;
1907 struct eckd_count *count_area;
1908 unsigned int sb, blk_per_trk;
1909 int status, i;
eb6e199b 1910 struct dasd_ccw_req *init_cqr;
1da177e4 1911
8e09f215 1912 device = block->base;
1da177e4
LT		 1913 private = (struct dasd_eckd_private *) device->private;
1914 status = private->init_cqr_status;
1915 private->init_cqr_status = -1;
eb6e199b
SW		 1916 if (status == INIT_CQR_ERROR) {
1917 /* try again, this time with full ERP */
1918 init_cqr = dasd_eckd_analysis_ccw(device);
1919 dasd_sleep_on(init_cqr);
1920 status = dasd_eckd_analysis_evaluation(init_cqr);
1921 dasd_sfree_request(init_cqr, device);
1922 }
1923
e4dbb0f2
SH		 1924 if (device->features & DASD_FEATURE_USERAW) {
1925 block->bp_block = DASD_RAW_BLOCKSIZE;
1926 blk_per_trk = DASD_RAW_BLOCK_PER_TRACK;
1927 block->s2b_shift = 3;
1928 goto raw;
1929 }
1930
eb6e199b
SW		 1931 if (status == INIT_CQR_UNFORMATTED) {
1932 dev_warn(&device->cdev->dev, "The DASD is not formatted\n");
1da177e4 1933 return -EMEDIUMTYPE;
eb6e199b
SW		 1934 } else if (status == INIT_CQR_ERROR) {
1935 dev_err(&device->cdev->dev,
1936 "Detecting the DASD disk layout failed because "
1937 "of an I/O error\n");
1938 return -EIO;
1da177e4
LT		 1939 }
1940
1941 private->uses_cdl = 1;
1da177e4
LT		 1942 /* Check Track 0 for Compatible Disk Layout */
1943 count_area = NULL;
1944 for (i = 0; i < 3; i++) {
1945 if (private->count_area[i].kl != 4 ||
3bc9fef9
SH		 1946 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 ||
1947 private->count_area[i].cyl != 0 ||
1948 private->count_area[i].head != count_area_head[i] ||
1949 private->count_area[i].record != count_area_rec[i]) {
1da177e4
LT		 1950 private->uses_cdl = 0;
1951 break;
1952 }
1953 }
1954 if (i == 3)
1955 count_area = &private->count_area[4];
1956
1957 if (private->uses_cdl == 0) {
1958 for (i = 0; i < 5; i++) {
1959 if ((private->count_area[i].kl != 0) ||
1960 (private->count_area[i].dl !=
3bc9fef9
SH		 1961 private->count_area[0].dl) ||
1962 private->count_area[i].cyl != 0 ||
1963 private->count_area[i].head != count_area_head[i] ||
1964 private->count_area[i].record != count_area_rec[i])
1da177e4
LT		 1965 break;
1966 }
1967 if (i == 5)
1968 count_area = &private->count_area[0];
1969 } else {
1970 if (private->count_area[3].record == 1)
fc19f381
SH		 1971 dev_warn(&device->cdev->dev,
1972 "Track 0 has no records following the VTOC\n");
1da177e4 1973 }
e4dbb0f2 1974
1da177e4
LT		 1975 if (count_area != NULL && count_area->kl == 0) {
1976 /* we found notthing violating our disk layout */
1977 if (dasd_check_blocksize(count_area->dl) == 0)
8e09f215 1978 block->bp_block = count_area->dl;
1da177e4 1979 }
8e09f215 1980 if (block->bp_block == 0) {
fc19f381
SH		 1981 dev_warn(&device->cdev->dev,
1982 "The disk layout of the DASD is not supported\n");
1da177e4
LT		 1983 return -EMEDIUMTYPE;
1984 }
8e09f215
SW		 1985 block->s2b_shift = 0; /* bits to shift 512 to get a block */
1986 for (sb = 512; sb < block->bp_block; sb = sb << 1)
1987 block->s2b_shift++;
1da177e4 1988
8e09f215 1989 blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block);
e4dbb0f2
SH		 1990
1991raw:
b44b0ab3 1992 block->blocks = (private->real_cyl *
1da177e4
LT		 1993 private->rdc_data.trk_per_cyl *
1994 blk_per_trk);
1995
fc19f381
SH		 1996 dev_info(&device->cdev->dev,
1997 "DASD with %d KB/block, %d KB total size, %d KB/track, "
1998 "%s\n", (block->bp_block >> 10),
1999 ((private->real_cyl *
2000 private->rdc_data.trk_per_cyl *
2001 blk_per_trk * (block->bp_block >> 9)) >> 1),
2002 ((blk_per_trk * block->bp_block) >> 10),
2003 private->uses_cdl ?
2004 "compatible disk layout" : "linux disk layout");
1da177e4
LT		 2005
2006 return 0;
2007}
2008
8e09f215 2009static int dasd_eckd_do_analysis(struct dasd_block *block)
1da177e4
LT		 2010{
2011 struct dasd_eckd_private *private;
2012
8e09f215 2013 private = (struct dasd_eckd_private *) block->base->private;
1da177e4 2014 if (private->init_cqr_status < 0)
8e09f215 2015 return dasd_eckd_start_analysis(block);
1da177e4 2016 else
8e09f215 2017 return dasd_eckd_end_analysis(block);
1da177e4
LT		 2018}
2019
8e09f215
SW		 2020static int dasd_eckd_ready_to_online(struct dasd_device *device)
2021{
2022 return dasd_alias_add_device(device);
2023};
2024
2025static int dasd_eckd_online_to_ready(struct dasd_device *device)
2026{
501183f2 2027 cancel_work_sync(&device->reload_device);
25e2cf1c 2028 cancel_work_sync(&device->kick_validate);
8e09f215
SW		 2029 return dasd_alias_remove_device(device);
2030};
2031
1da177e4 2032static int
8e09f215 2033dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo)
1da177e4
LT		 2034{
2035 struct dasd_eckd_private *private;
2036
8e09f215
SW		 2037 private = (struct dasd_eckd_private *) block->base->private;
2038 if (dasd_check_blocksize(block->bp_block) == 0) {
1da177e4 2039 geo->sectors = recs_per_track(&private->rdc_data,
8e09f215 2040 0, block->bp_block);
1da177e4
LT		 2041 }
2042 geo->cylinders = private->rdc_data.no_cyl;
2043 geo->heads = private->rdc_data.trk_per_cyl;
2044 return 0;
2045}
2046
2047static struct dasd_ccw_req *
2048dasd_eckd_format_device(struct dasd_device * device,
2049 struct format_data_t * fdata)
2050{
2051 struct dasd_eckd_private *private;
2052 struct dasd_ccw_req *fcp;
2053 struct eckd_count *ect;
2054 struct ccw1 *ccw;
2055 void *data;
b44b0ab3
SW		 2056 int rpt;
2057 struct ch_t address;
1da177e4
LT		 2058 int cplength, datasize;
2059 int i;
f9a28f7b
JBJ		 2060 int intensity = 0;
2061 int r0_perm;
1da177e4
LT		 2062
2063 private = (struct dasd_eckd_private *) device->private;
2064 rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize);
b44b0ab3
SW		 2065 set_ch_t(&address,
2066 fdata->start_unit / private->rdc_data.trk_per_cyl,
2067 fdata->start_unit % private->rdc_data.trk_per_cyl);
1da177e4
LT		 2068
2069 /* Sanity checks. */
2070 if (fdata->start_unit >=
b44b0ab3 2071 (private->real_cyl * private->rdc_data.trk_per_cyl)) {
fc19f381
SH		 2072 dev_warn(&device->cdev->dev, "Start track number %d used in "
2073 "formatting is too big\n", fdata->start_unit);
1da177e4
LT		 2074 return ERR_PTR(-EINVAL);
2075 }
2076 if (fdata->start_unit > fdata->stop_unit) {
fc19f381
SH		 2077 dev_warn(&device->cdev->dev, "Start track %d used in "
2078 "formatting exceeds end track\n", fdata->start_unit);
1da177e4
LT		 2079 return ERR_PTR(-EINVAL);
2080 }
2081 if (dasd_check_blocksize(fdata->blksize) != 0) {
fc19f381
SH		 2082 dev_warn(&device->cdev->dev,
2083 "The DASD cannot be formatted with block size %d\n",
2084 fdata->blksize);
1da177e4
LT		 2085 return ERR_PTR(-EINVAL);
2086 }
2087
2088 /*
2089 * fdata->intensity is a bit string that tells us what to do:
2090 * Bit 0: write record zero
2091 * Bit 1: write home address, currently not supported
2092 * Bit 2: invalidate tracks
2093 * Bit 3: use OS/390 compatible disk layout (cdl)
f9a28f7b 2094 * Bit 4: do not allow storage subsystem to modify record zero
1da177e4
LT		 2095 * Only some bit combinations do make sense.
2096 */
f9a28f7b
JBJ		 2097 if (fdata->intensity & 0x10) {
2098 r0_perm = 0;
2099 intensity = fdata->intensity & ~0x10;
2100 } else {
2101 r0_perm = 1;
2102 intensity = fdata->intensity;
2103 }
2104 switch (intensity) {
1da177e4
LT		 2105 case 0x00: /* Normal format */
2106 case 0x08: /* Normal format, use cdl. */
2107 cplength = 2 + rpt;
2108 datasize = sizeof(struct DE_eckd_data) +
2109 sizeof(struct LO_eckd_data) +
2110 rpt * sizeof(struct eckd_count);
2111 break;
2112 case 0x01: /* Write record zero and format track. */
2113 case 0x09: /* Write record zero and format track, use cdl. */
2114 cplength = 3 + rpt;
2115 datasize = sizeof(struct DE_eckd_data) +
2116 sizeof(struct LO_eckd_data) +
2117 sizeof(struct eckd_count) +
2118 rpt * sizeof(struct eckd_count);
2119 break;
2120 case 0x04: /* Invalidate track. */
2121 case 0x0c: /* Invalidate track, use cdl. */
2122 cplength = 3;
2123 datasize = sizeof(struct DE_eckd_data) +
2124 sizeof(struct LO_eckd_data) +
2125 sizeof(struct eckd_count);
2126 break;
2127 default:
fc19f381
SH		 2128 dev_warn(&device->cdev->dev, "An I/O control call used "
2129 "incorrect flags 0x%x\n", fdata->intensity);
1da177e4
LT		 2130 return ERR_PTR(-EINVAL);
2131 }
2132 /* Allocate the format ccw request. */
68b781fe 2133 fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device);
1da177e4
LT		 2134 if (IS_ERR(fcp))
2135 return fcp;
2136
2137 data = fcp->data;
2138 ccw = fcp->cpaddr;
2139
f9a28f7b 2140 switch (intensity & ~0x08) {
1da177e4
LT		 2141 case 0x00: /* Normal format. */
2142 define_extent(ccw++, (struct DE_eckd_data *) data,
2143 fdata->start_unit, fdata->start_unit,
2144 DASD_ECKD_CCW_WRITE_CKD, device);
f9a28f7b
JBJ		 2145 /* grant subsystem permission to format R0 */
2146 if (r0_perm)
2147 ((struct DE_eckd_data *)data)->ga_extended |= 0x04;
1da177e4
LT		 2148 data += sizeof(struct DE_eckd_data);
2149 ccw[-1].flags |= CCW_FLAG_CC;
2150 locate_record(ccw++, (struct LO_eckd_data *) data,
2151 fdata->start_unit, 0, rpt,
2152 DASD_ECKD_CCW_WRITE_CKD, device,
2153 fdata->blksize);
2154 data += sizeof(struct LO_eckd_data);
2155 break;
2156 case 0x01: /* Write record zero + format track. */
2157 define_extent(ccw++, (struct DE_eckd_data *) data,
2158 fdata->start_unit, fdata->start_unit,
2159 DASD_ECKD_CCW_WRITE_RECORD_ZERO,
2160 device);
2161 data += sizeof(struct DE_eckd_data);
2162 ccw[-1].flags |= CCW_FLAG_CC;
2163 locate_record(ccw++, (struct LO_eckd_data *) data,
2164 fdata->start_unit, 0, rpt + 1,
2165 DASD_ECKD_CCW_WRITE_RECORD_ZERO, device,
8e09f215 2166 device->block->bp_block);
1da177e4
LT		 2167 data += sizeof(struct LO_eckd_data);
2168 break;
2169 case 0x04: /* Invalidate track. */
2170 define_extent(ccw++, (struct DE_eckd_data *) data,
2171 fdata->start_unit, fdata->start_unit,
2172 DASD_ECKD_CCW_WRITE_CKD, device);
2173 data += sizeof(struct DE_eckd_data);
2174 ccw[-1].flags |= CCW_FLAG_CC;
2175 locate_record(ccw++, (struct LO_eckd_data *) data,
2176 fdata->start_unit, 0, 1,
2177 DASD_ECKD_CCW_WRITE_CKD, device, 8);
2178 data += sizeof(struct LO_eckd_data);
2179 break;
2180 }
f9a28f7b 2181 if (intensity & 0x01) { /* write record zero */
1da177e4
LT		 2182 ect = (struct eckd_count *) data;
2183 data += sizeof(struct eckd_count);
b44b0ab3
SW		 2184 ect->cyl = address.cyl;
2185 ect->head = address.head;
1da177e4
LT		 2186 ect->record = 0;
2187 ect->kl = 0;
2188 ect->dl = 8;
2189 ccw[-1].flags |= CCW_FLAG_CC;
2190 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO;
2191 ccw->flags = CCW_FLAG_SLI;
2192 ccw->count = 8;
2193 ccw->cda = (__u32)(addr_t) ect;
2194 ccw++;
2195 }
f9a28f7b 2196 if ((intensity & ~0x08) & 0x04) { /* erase track */
1da177e4
LT		 2197 ect = (struct eckd_count *) data;
2198 data += sizeof(struct eckd_count);
b44b0ab3
SW		 2199 ect->cyl = address.cyl;
2200 ect->head = address.head;
1da177e4
LT		 2201 ect->record = 1;
2202 ect->kl = 0;
2203 ect->dl = 0;
2204 ccw[-1].flags |= CCW_FLAG_CC;
2205 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
2206 ccw->flags = CCW_FLAG_SLI;
2207 ccw->count = 8;
2208 ccw->cda = (__u32)(addr_t) ect;
2209 } else { /* write remaining records */
2210 for (i = 0; i < rpt; i++) {
2211 ect = (struct eckd_count *) data;
2212 data += sizeof(struct eckd_count);
b44b0ab3
SW		 2213 ect->cyl = address.cyl;
2214 ect->head = address.head;
1da177e4
LT		 2215 ect->record = i + 1;
2216 ect->kl = 0;
2217 ect->dl = fdata->blksize;
2218 /* Check for special tracks 0-1 when formatting CDL */
f9a28f7b 2219 if ((intensity & 0x08) &&
1da177e4
LT		 2220 fdata->start_unit == 0) {
2221 if (i < 3) {
2222 ect->kl = 4;
2223 ect->dl = sizes_trk0[i] - 4;
138c014d 2224 }
1da177e4 2225 }
f9a28f7b 2226 if ((intensity & 0x08) &&
1da177e4
LT		 2227 fdata->start_unit == 1) {
2228 ect->kl = 44;
2229 ect->dl = LABEL_SIZE - 44;
2230 }
2231 ccw[-1].flags |= CCW_FLAG_CC;
2232 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
2233 ccw->flags = CCW_FLAG_SLI;
2234 ccw->count = 8;
2235 ccw->cda = (__u32)(addr_t) ect;
2236 ccw++;
2237 }
2238 }
8e09f215
SW		 2239 fcp->startdev = device;
2240 fcp->memdev = device;
eb6e199b 2241 fcp->retries = 256;
1da177e4
LT		 2242 fcp->buildclk = get_clock();
2243 fcp->status = DASD_CQR_FILLED;
2244 return fcp;
2245}
2246
8e09f215 2247static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr)
1da177e4 2248{
8e09f215
SW		 2249 cqr->status = DASD_CQR_FILLED;
2250 if (cqr->block && (cqr->startdev != cqr->block->base)) {
2251 dasd_eckd_reset_ccw_to_base_io(cqr);
2252 cqr->startdev = cqr->block->base;
a4d26c6a 2253 cqr->lpm = cqr->block->base->path_data.opm;
1da177e4 2254 }
8e09f215 2255};
1da177e4
LT		 2256
2257static dasd_erp_fn_t
2258dasd_eckd_erp_action(struct dasd_ccw_req * cqr)
2259{
8e09f215 2260 struct dasd_device *device = (struct dasd_device *) cqr->startdev;
1da177e4
LT		 2261 struct ccw_device *cdev = device->cdev;
2262
2263 switch (cdev->id.cu_type) {
2264 case 0x3990:
2265 case 0x2105:
2266 case 0x2107:
2267 case 0x1750:
2268 return dasd_3990_erp_action;
2269 case 0x9343:
2270 case 0x3880:
2271 default:
2272 return dasd_default_erp_action;
2273 }
2274}
2275
2276static dasd_erp_fn_t
2277dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr)
2278{
2279 return dasd_default_erp_postaction;
2280}
2281
5a27e60d
SW		 2282static void dasd_eckd_check_for_device_change(struct dasd_device *device,
2283 struct dasd_ccw_req *cqr,
2284 struct irb *irb)
8e09f215
SW		 2285{
2286 char mask;
f3eb5384 2287 char *sense = NULL;
501183f2 2288 struct dasd_eckd_private *private;
8e09f215 2289
501183f2 2290 private = (struct dasd_eckd_private *) device->private;
8e09f215
SW		 2291 /* first of all check for state change pending interrupt */
2292 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP;
f3eb5384 2293 if ((scsw_dstat(&irb->scsw) & mask) == mask) {
c8d1c0ff
SH		 2294 /*
2295 * for alias only, not in offline processing
2296 * and only if not suspended
2297 */
501183f2 2298 if (!device->block && private->lcu &&
25e2cf1c 2299 device->state == DASD_STATE_ONLINE &&
c8d1c0ff
SH		 2300 !test_bit(DASD_FLAG_OFFLINE, &device->flags) &&
2301 !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) {
501183f2
SH		 2302 /*
2303 * the state change could be caused by an alias
2304 * reassignment remove device from alias handling
2305 * to prevent new requests from being scheduled on
2306 * the wrong alias device
2307 */
2308 dasd_alias_remove_device(device);
2309
2310 /* schedule worker to reload device */
2311 dasd_reload_device(device);
2312 }
8e09f215
SW		 2313 dasd_generic_handle_state_change(device);
2314 return;
2315 }
2316
a5a0061f 2317 sense = dasd_get_sense(irb);
5a27e60d
SW		 2318 if (!sense)
2319 return;
2320
2321 /* summary unit check */
c7a29e56 2322 if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) &&
a5a0061f 2323 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) {
8e09f215
SW		 2324 dasd_alias_handle_summary_unit_check(device, irb);
2325 return;
2326 }
2327
f60c768c 2328 /* service information message SIM */
5a27e60d 2329 if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) &&
f3eb5384
SW		 2330 ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) {
2331 dasd_3990_erp_handle_sim(device, sense);
f60c768c
SH		 2332 return;
2333 }
2334
5a27e60d
SW		 2335 /* loss of device reservation is handled via base devices only
2336 * as alias devices may be used with several bases
2337 */
c7a29e56
SW		 2338 if (device->block && (sense[27] & DASD_SENSE_BIT_0) &&
2339 (sense[7] == 0x3F) &&
5a27e60d
SW		 2340 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) &&
2341 test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) {
2342 if (device->features & DASD_FEATURE_FAILONSLCK)
2343 set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags);
2344 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags);
2345 dev_err(&device->cdev->dev,
2346 "The device reservation was lost\n");
ada3df91 2347 }
5a27e60d 2348}
f3eb5384
SW		 2349
2350static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single(
2351 struct dasd_device *startdev,
8e09f215 2352 struct dasd_block *block,
f3eb5384
SW		 2353 struct request *req,
2354 sector_t first_rec,
2355 sector_t last_rec,
2356 sector_t first_trk,
2357 sector_t last_trk,
2358 unsigned int first_offs,
2359 unsigned int last_offs,
2360 unsigned int blk_per_trk,
2361 unsigned int blksize)
1da177e4
LT		 2362{
2363 struct dasd_eckd_private *private;
2364 unsigned long *idaws;
2365 struct LO_eckd_data *LO_data;
2366 struct dasd_ccw_req *cqr;
2367 struct ccw1 *ccw;
5705f702 2368 struct req_iterator iter;
1da177e4
LT		 2369 struct bio_vec *bv;
2370 char *dst;
f3eb5384 2371 unsigned int off;
1da177e4 2372 int count, cidaw, cplength, datasize;
f3eb5384 2373 sector_t recid;
1da177e4 2374 unsigned char cmd, rcmd;
8e09f215
SW		 2375 int use_prefix;
2376 struct dasd_device *basedev;
1da177e4 2377
8e09f215
SW		 2378 basedev = block->base;
2379 private = (struct dasd_eckd_private *) basedev->private;
1da177e4
LT		 2380 if (rq_data_dir(req) == READ)
2381 cmd = DASD_ECKD_CCW_READ_MT;
2382 else if (rq_data_dir(req) == WRITE)
2383 cmd = DASD_ECKD_CCW_WRITE_MT;
2384 else
2385 return ERR_PTR(-EINVAL);
f3eb5384 2386
1da177e4
LT		 2387 /* Check struct bio and count the number of blocks for the request. */
2388 count = 0;
2389 cidaw = 0;
5705f702 2390 rq_for_each_segment(bv, req, iter) {
6c92e699
JA		 2391 if (bv->bv_len & (blksize - 1))
2392 /* Eckd can only do full blocks. */
2393 return ERR_PTR(-EINVAL);
8e09f215 2394 count += bv->bv_len >> (block->s2b_shift + 9);
347a8dc3 2395#if defined(CONFIG_64BIT)
6c92e699 2396 if (idal_is_needed (page_address(bv->bv_page), bv->bv_len))
8e09f215 2397 cidaw += bv->bv_len >> (block->s2b_shift + 9);
1da177e4 2398#endif
1da177e4
LT		 2399 }
2400 /* Paranoia. */
2401 if (count != last_rec - first_rec + 1)
2402 return ERR_PTR(-EINVAL);
8e09f215
SW		 2403
2404 /* use the prefix command if available */
2405 use_prefix = private->features.feature[8] & 0x01;
2406 if (use_prefix) {
2407 /* 1x prefix + number of blocks */
2408 cplength = 2 + count;
2409 /* 1x prefix + cidaws*sizeof(long) */
2410 datasize = sizeof(struct PFX_eckd_data) +
2411 sizeof(struct LO_eckd_data) +
2412 cidaw * sizeof(unsigned long);
2413 } else {
2414 /* 1x define extent + 1x locate record + number of blocks */
2415 cplength = 2 + count;
2416 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */
2417 datasize = sizeof(struct DE_eckd_data) +
2418 sizeof(struct LO_eckd_data) +
2419 cidaw * sizeof(unsigned long);
2420 }
1da177e4
LT		 2421 /* Find out the number of additional locate record ccws for cdl. */
2422 if (private->uses_cdl && first_rec < 2*blk_per_trk) {
2423 if (last_rec >= 2*blk_per_trk)
2424 count = 2*blk_per_trk - first_rec;
2425 cplength += count;
2426 datasize += count*sizeof(struct LO_eckd_data);
2427 }
2428 /* Allocate the ccw request. */
68b781fe
SH		 2429 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
2430 startdev);
1da177e4
LT		 2431 if (IS_ERR(cqr))
2432 return cqr;
2433 ccw = cqr->cpaddr;
8e09f215
SW		 2434 /* First ccw is define extent or prefix. */
2435 if (use_prefix) {
2436 if (prefix(ccw++, cqr->data, first_trk,
2437 last_trk, cmd, basedev, startdev) == -EAGAIN) {
2438 /* Clock not in sync and XRC is enabled.
2439 * Try again later.
2440 */
2441 dasd_sfree_request(cqr, startdev);
2442 return ERR_PTR(-EAGAIN);
2443 }
2444 idaws = (unsigned long *) (cqr->data +
2445 sizeof(struct PFX_eckd_data));
2446 } else {
2447 if (define_extent(ccw++, cqr->data, first_trk,
b38f27e8 2448 last_trk, cmd, basedev) == -EAGAIN) {
8e09f215
SW		 2449 /* Clock not in sync and XRC is enabled.
2450 * Try again later.
2451 */
2452 dasd_sfree_request(cqr, startdev);
2453 return ERR_PTR(-EAGAIN);
2454 }
2455 idaws = (unsigned long *) (cqr->data +
2456 sizeof(struct DE_eckd_data));
d54853ef 2457 }
1da177e4 2458 /* Build locate_record+read/write/ccws. */
1da177e4
LT		 2459 LO_data = (struct LO_eckd_data *) (idaws + cidaw);
2460 recid = first_rec;
2461 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) {
2462 /* Only standard blocks so there is just one locate record. */
2463 ccw[-1].flags |= CCW_FLAG_CC;
2464 locate_record(ccw++, LO_data++, first_trk, first_offs + 1,
8e09f215 2465 last_rec - recid + 1, cmd, basedev, blksize);
1da177e4 2466 }
5705f702 2467 rq_for_each_segment(bv, req, iter) {
1da177e4
LT		 2468 dst = page_address(bv->bv_page) + bv->bv_offset;
2469 if (dasd_page_cache) {
2470 char *copy = kmem_cache_alloc(dasd_page_cache,
441e143e 2471 GFP_DMA | __GFP_NOWARN);
1da177e4
LT		 2472 if (copy && rq_data_dir(req) == WRITE)
2473 memcpy(copy + bv->bv_offset, dst, bv->bv_len);
2474 if (copy)
2475 dst = copy + bv->bv_offset;
2476 }
2477 for (off = 0; off < bv->bv_len; off += blksize) {
2478 sector_t trkid = recid;
2479 unsigned int recoffs = sector_div(trkid, blk_per_trk);
2480 rcmd = cmd;
2481 count = blksize;
2482 /* Locate record for cdl special block ? */
2483 if (private->uses_cdl && recid < 2*blk_per_trk) {
2484 if (dasd_eckd_cdl_special(blk_per_trk, recid)){
2485 rcmd |= 0x8;
2486 count = dasd_eckd_cdl_reclen(recid);
ec5883ab
HH		 2487 if (count < blksize &&
2488 rq_data_dir(req) == READ)
1da177e4
LT		 2489 memset(dst + count, 0xe5,
2490 blksize - count);
2491 }
2492 ccw[-1].flags |= CCW_FLAG_CC;
2493 locate_record(ccw++, LO_data++,
2494 trkid, recoffs + 1,
8e09f215 2495 1, rcmd, basedev, count);
1da177e4
LT		 2496 }
2497 /* Locate record for standard blocks ? */
2498 if (private->uses_cdl && recid == 2*blk_per_trk) {
2499 ccw[-1].flags |= CCW_FLAG_CC;
2500 locate_record(ccw++, LO_data++,
2501 trkid, recoffs + 1,
2502 last_rec - recid + 1,
8e09f215 2503 cmd, basedev, count);
1da177e4
LT		 2504 }
2505 /* Read/write ccw. */
2506 ccw[-1].flags |= CCW_FLAG_CC;
2507 ccw->cmd_code = rcmd;
2508 ccw->count = count;
2509 if (idal_is_needed(dst, blksize)) {
2510 ccw->cda = (__u32)(addr_t) idaws;
2511 ccw->flags = CCW_FLAG_IDA;
2512 idaws = idal_create_words(idaws, dst, blksize);
2513 } else {
2514 ccw->cda = (__u32)(addr_t) dst;
2515 ccw->flags = 0;
2516 }
2517 ccw++;
2518 dst += blksize;
2519 recid++;
2520 }
2521 }
13de227b
HS		 2522 if (blk_noretry_request(req) ||
2523 block->base->features & DASD_FEATURE_FAILFAST)
1c01b8a5 2524 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
8e09f215
SW		 2525 cqr->startdev = startdev;
2526 cqr->memdev = startdev;
2527 cqr->block = block;
7c8faa86 2528 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
a4d26c6a 2529 cqr->lpm = startdev->path_data.ppm;
1da177e4
LT		 2530 cqr->retries = 256;
2531 cqr->buildclk = get_clock();
2532 cqr->status = DASD_CQR_FILLED;
2533 return cqr;
2534}
2535
f3eb5384
SW		 2536static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track(
2537 struct dasd_device *startdev,
2538 struct dasd_block *block,
2539 struct request *req,
2540 sector_t first_rec,
2541 sector_t last_rec,
2542 sector_t first_trk,
2543 sector_t last_trk,
2544 unsigned int first_offs,
2545 unsigned int last_offs,
2546 unsigned int blk_per_trk,
2547 unsigned int blksize)
2548{
f3eb5384
SW		 2549 unsigned long *idaws;
2550 struct dasd_ccw_req *cqr;
2551 struct ccw1 *ccw;
2552 struct req_iterator iter;
2553 struct bio_vec *bv;
2554 char *dst, *idaw_dst;
2555 unsigned int cidaw, cplength, datasize;
2556 unsigned int tlf;
2557 sector_t recid;
2558 unsigned char cmd;
2559 struct dasd_device *basedev;
2560 unsigned int trkcount, count, count_to_trk_end;
2561 unsigned int idaw_len, seg_len, part_len, len_to_track_end;
2562 unsigned char new_track, end_idaw;
2563 sector_t trkid;
2564 unsigned int recoffs;
2565
2566 basedev = block->base;
f3eb5384
SW		 2567 if (rq_data_dir(req) == READ)
2568 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
2569 else if (rq_data_dir(req) == WRITE)
2570 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
2571 else
2572 return ERR_PTR(-EINVAL);
2573
2574 /* Track based I/O needs IDAWs for each page, and not just for
2575 * 64 bit addresses. We need additional idals for pages
2576 * that get filled from two tracks, so we use the number
2577 * of records as upper limit.
2578 */
2579 cidaw = last_rec - first_rec + 1;
2580 trkcount = last_trk - first_trk + 1;
2581
2582 /* 1x prefix + one read/write ccw per track */
2583 cplength = 1 + trkcount;
2584
2585 /* on 31-bit we need space for two 32 bit addresses per page
2586 * on 64-bit one 64 bit address
2587 */
2588 datasize = sizeof(struct PFX_eckd_data) +
2589 cidaw * sizeof(unsigned long long);
2590
2591 /* Allocate the ccw request. */
68b781fe
SH		 2592 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
2593 startdev);
f3eb5384
SW		 2594 if (IS_ERR(cqr))
2595 return cqr;
2596 ccw = cqr->cpaddr;
2597 /* transfer length factor: how many bytes to read from the last track */
2598 if (first_trk == last_trk)
2599 tlf = last_offs - first_offs + 1;
2600 else
2601 tlf = last_offs + 1;
2602 tlf *= blksize;
2603
2604 if (prefix_LRE(ccw++, cqr->data, first_trk,
2605 last_trk, cmd, basedev, startdev,
2606 1 /* format */, first_offs + 1,
2607 trkcount, blksize,
2608 tlf) == -EAGAIN) {
2609 /* Clock not in sync and XRC is enabled.
2610 * Try again later.
2611 */
2612 dasd_sfree_request(cqr, startdev);
2613 return ERR_PTR(-EAGAIN);
2614 }
2615
2616 /*
2617 * The translation of request into ccw programs must meet the
2618 * following conditions:
2619 * - all idaws but the first and the last must address full pages
2620 * (or 2K blocks on 31-bit)
2621 * - the scope of a ccw and it's idal ends with the track boundaries
2622 */
2623 idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data));
2624 recid = first_rec;
2625 new_track = 1;
2626 end_idaw = 0;
2627 len_to_track_end = 0;
246ccea1 2628 idaw_dst = NULL;
f3eb5384
SW		 2629 idaw_len = 0;
2630 rq_for_each_segment(bv, req, iter) {
2631 dst = page_address(bv->bv_page) + bv->bv_offset;
2632 seg_len = bv->bv_len;
2633 while (seg_len) {
2634 if (new_track) {
2635 trkid = recid;
2636 recoffs = sector_div(trkid, blk_per_trk);
2637 count_to_trk_end = blk_per_trk - recoffs;
2638 count = min((last_rec - recid + 1),
2639 (sector_t)count_to_trk_end);
2640 len_to_track_end = count * blksize;
2641 ccw[-1].flags |= CCW_FLAG_CC;
2642 ccw->cmd_code = cmd;
2643 ccw->count = len_to_track_end;
2644 ccw->cda = (__u32)(addr_t)idaws;
2645 ccw->flags = CCW_FLAG_IDA;
2646 ccw++;
2647 recid += count;
2648 new_track = 0;
52db45c3
SW		 2649 /* first idaw for a ccw may start anywhere */
2650 if (!idaw_dst)
2651 idaw_dst = dst;
f3eb5384 2652 }
52db45c3
SW		 2653 /* If we start a new idaw, we must make sure that it
2654 * starts on an IDA_BLOCK_SIZE boundary.
f3eb5384
SW		 2655 * If we continue an idaw, we must make sure that the
2656 * current segment begins where the so far accumulated
2657 * idaw ends
2658 */
52db45c3
SW		 2659 if (!idaw_dst) {
2660 if (__pa(dst) & (IDA_BLOCK_SIZE-1)) {
2661 dasd_sfree_request(cqr, startdev);
2662 return ERR_PTR(-ERANGE);
2663 } else
2664 idaw_dst = dst;
2665 }
f3eb5384
SW		 2666 if ((idaw_dst + idaw_len) != dst) {
2667 dasd_sfree_request(cqr, startdev);
2668 return ERR_PTR(-ERANGE);
2669 }
2670 part_len = min(seg_len, len_to_track_end);
2671 seg_len -= part_len;
2672 dst += part_len;
2673 idaw_len += part_len;
2674 len_to_track_end -= part_len;
2675 /* collected memory area ends on an IDA_BLOCK border,
2676 * -> create an idaw
2677 * idal_create_words will handle cases where idaw_len
2678 * is larger then IDA_BLOCK_SIZE
2679 */
2680 if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1)))
2681 end_idaw = 1;
2682 /* We also need to end the idaw at track end */
2683 if (!len_to_track_end) {
2684 new_track = 1;
2685 end_idaw = 1;
2686 }
2687 if (end_idaw) {
2688 idaws = idal_create_words(idaws, idaw_dst,
2689 idaw_len);
246ccea1 2690 idaw_dst = NULL;
f3eb5384
SW		 2691 idaw_len = 0;
2692 end_idaw = 0;
2693 }
2694 }
2695 }
2696
2697 if (blk_noretry_request(req) ||
2698 block->base->features & DASD_FEATURE_FAILFAST)
2699 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2700 cqr->startdev = startdev;
2701 cqr->memdev = startdev;
2702 cqr->block = block;
7c8faa86 2703 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
a4d26c6a 2704 cqr->lpm = startdev->path_data.ppm;
f3eb5384
SW		 2705 cqr->retries = 256;
2706 cqr->buildclk = get_clock();
2707 cqr->status = DASD_CQR_FILLED;
2708 return cqr;
2709}
2710
2711static int prepare_itcw(struct itcw *itcw,
2712 unsigned int trk, unsigned int totrk, int cmd,
2713 struct dasd_device *basedev,
2714 struct dasd_device *startdev,
2715 unsigned int rec_on_trk, int count,
2716 unsigned int blksize,
2717 unsigned int total_data_size,
2718 unsigned int tlf,
2719 unsigned int blk_per_trk)
2720{
2721 struct PFX_eckd_data pfxdata;
2722 struct dasd_eckd_private *basepriv, *startpriv;
2723 struct DE_eckd_data *dedata;
2724 struct LRE_eckd_data *lredata;
2725 struct dcw *dcw;
2726
2727 u32 begcyl, endcyl;
2728 u16 heads, beghead, endhead;
2729 u8 pfx_cmd;
2730
2731 int rc = 0;
2732 int sector = 0;
2733 int dn, d;
2734
2735
2736 /* setup prefix data */
2737 basepriv = (struct dasd_eckd_private *) basedev->private;
2738 startpriv = (struct dasd_eckd_private *) startdev->private;
2739 dedata = &pfxdata.define_extent;
2740 lredata = &pfxdata.locate_record;
2741
2742 memset(&pfxdata, 0, sizeof(pfxdata));
2743 pfxdata.format = 1; /* PFX with LRE */
2744 pfxdata.base_address = basepriv->ned->unit_addr;
2745 pfxdata.base_lss = basepriv->ned->ID;
2746 pfxdata.validity.define_extent = 1;
2747
2748 /* private uid is kept up to date, conf_data may be outdated */
2749 if (startpriv->uid.type != UA_BASE_DEVICE) {
2750 pfxdata.validity.verify_base = 1;
2751 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS)
2752 pfxdata.validity.hyper_pav = 1;
2753 }
2754
2755 switch (cmd) {
2756 case DASD_ECKD_CCW_READ_TRACK_DATA:
2757 dedata->mask.perm = 0x1;
2758 dedata->attributes.operation = basepriv->attrib.operation;
2759 dedata->blk_size = blksize;
2760 dedata->ga_extended |= 0x42;
2761 lredata->operation.orientation = 0x0;
2762 lredata->operation.operation = 0x0C;
2763 lredata->auxiliary.check_bytes = 0x01;
2764 pfx_cmd = DASD_ECKD_CCW_PFX_READ;
2765 break;
2766 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
2767 dedata->mask.perm = 0x02;
2768 dedata->attributes.operation = basepriv->attrib.operation;
2769 dedata->blk_size = blksize;
2770 rc = check_XRC_on_prefix(&pfxdata, basedev);
2771 dedata->ga_extended |= 0x42;
2772 lredata->operation.orientation = 0x0;
2773 lredata->operation.operation = 0x3F;
2774 lredata->extended_operation = 0x23;
2775 lredata->auxiliary.check_bytes = 0x2;
2776 pfx_cmd = DASD_ECKD_CCW_PFX;
2777 break;
2778 default:
2779 DBF_DEV_EVENT(DBF_ERR, basedev,
2780 "prepare itcw, unknown opcode 0x%x", cmd);
2781 BUG();
2782 break;
2783 }
2784 if (rc)
2785 return rc;
2786
2787 dedata->attributes.mode = 0x3; /* ECKD */
2788
2789 heads = basepriv->rdc_data.trk_per_cyl;
2790 begcyl = trk / heads;
2791 beghead = trk % heads;
2792 endcyl = totrk / heads;
2793 endhead = totrk % heads;
2794
2795 /* check for sequential prestage - enhance cylinder range */
2796 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE ||
2797 dedata->attributes.operation == DASD_SEQ_ACCESS) {
2798
2799 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl)
2800 endcyl += basepriv->attrib.nr_cyl;
2801 else
2802 endcyl = (basepriv->real_cyl - 1);
2803 }
2804
2805 set_ch_t(&dedata->beg_ext, begcyl, beghead);
2806 set_ch_t(&dedata->end_ext, endcyl, endhead);
2807
2808 dedata->ep_format = 0x20; /* records per track is valid */
2809 dedata->ep_rec_per_track = blk_per_trk;
2810
2811 if (rec_on_trk) {
2812 switch (basepriv->rdc_data.dev_type) {
2813 case 0x3390:
2814 dn = ceil_quot(blksize + 6, 232);
2815 d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34);
2816 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
2817 break;
2818 case 0x3380:
2819 d = 7 + ceil_quot(blksize + 12, 32);
2820 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
2821 break;
2822 }
2823 }
2824
2825 lredata->auxiliary.length_valid = 1;
2826 lredata->auxiliary.length_scope = 1;
2827 lredata->auxiliary.imbedded_ccw_valid = 1;
2828 lredata->length = tlf;
2829 lredata->imbedded_ccw = cmd;
2830 lredata->count = count;
2831 lredata->sector = sector;
2832 set_ch_t(&lredata->seek_addr, begcyl, beghead);
2833 lredata->search_arg.cyl = lredata->seek_addr.cyl;
2834 lredata->search_arg.head = lredata->seek_addr.head;
2835 lredata->search_arg.record = rec_on_trk;
2836
2837 dcw = itcw_add_dcw(itcw, pfx_cmd, 0,
2838 &pfxdata, sizeof(pfxdata), total_data_size);
364c18d8 2839 return IS_ERR(dcw) ? PTR_ERR(dcw) : 0;
f3eb5384
SW		 2840}
2841
2842static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track(
2843 struct dasd_device *startdev,
2844 struct dasd_block *block,
2845 struct request *req,
2846 sector_t first_rec,
2847 sector_t last_rec,
2848 sector_t first_trk,
2849 sector_t last_trk,
2850 unsigned int first_offs,
2851 unsigned int last_offs,
2852 unsigned int blk_per_trk,
2853 unsigned int blksize)
2854{
f3eb5384
SW		 2855 struct dasd_ccw_req *cqr;
2856 struct req_iterator iter;
2857 struct bio_vec *bv;
2858 char *dst;
2859 unsigned int trkcount, ctidaw;
2860 unsigned char cmd;
2861 struct dasd_device *basedev;
2862 unsigned int tlf;
2863 struct itcw *itcw;
2864 struct tidaw *last_tidaw = NULL;
2865 int itcw_op;
2866 size_t itcw_size;
ef19298b
SW		 2867 u8 tidaw_flags;
2868 unsigned int seg_len, part_len, len_to_track_end;
2869 unsigned char new_track;
2870 sector_t recid, trkid;
2871 unsigned int offs;
2872 unsigned int count, count_to_trk_end;
cd10502b 2873 int ret;
f3eb5384
SW		 2874
2875 basedev = block->base;
f3eb5384
SW		 2876 if (rq_data_dir(req) == READ) {
2877 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
2878 itcw_op = ITCW_OP_READ;
2879 } else if (rq_data_dir(req) == WRITE) {
2880 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
2881 itcw_op = ITCW_OP_WRITE;
2882 } else
2883 return ERR_PTR(-EINVAL);
2884
2885 /* trackbased I/O needs address all memory via TIDAWs,
2886 * not just for 64 bit addresses. This allows us to map
2887 * each segment directly to one tidaw.
ef19298b
SW		 2888 * In the case of write requests, additional tidaws may
2889 * be needed when a segment crosses a track boundary.
f3eb5384
SW		 2890 */
2891 trkcount = last_trk - first_trk + 1;
2892 ctidaw = 0;
2893 rq_for_each_segment(bv, req, iter) {
2894 ++ctidaw;
2895 }
ef19298b
SW		 2896 if (rq_data_dir(req) == WRITE)
2897 ctidaw += (last_trk - first_trk);
f3eb5384
SW		 2898
2899 /* Allocate the ccw request. */
2900 itcw_size = itcw_calc_size(0, ctidaw, 0);
68b781fe 2901 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev);
f3eb5384
SW		 2902 if (IS_ERR(cqr))
2903 return cqr;
2904
f3eb5384
SW		 2905 /* transfer length factor: how many bytes to read from the last track */
2906 if (first_trk == last_trk)
2907 tlf = last_offs - first_offs + 1;
2908 else
2909 tlf = last_offs + 1;
2910 tlf *= blksize;
2911
2912 itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0);
ef19298b 2913 if (IS_ERR(itcw)) {
cd10502b
JL		 2914 ret = -EINVAL;
2915 goto out_error;
ef19298b 2916 }
f3eb5384 2917 cqr->cpaddr = itcw_get_tcw(itcw);
f3eb5384
SW		 2918 if (prepare_itcw(itcw, first_trk, last_trk,
2919 cmd, basedev, startdev,
2920 first_offs + 1,
2921 trkcount, blksize,
2922 (last_rec - first_rec + 1) * blksize,
2923 tlf, blk_per_trk) == -EAGAIN) {
2924 /* Clock not in sync and XRC is enabled.
2925 * Try again later.
2926 */
cd10502b
JL		 2927 ret = -EAGAIN;
2928 goto out_error;
f3eb5384 2929 }
d54cddb6 2930 len_to_track_end = 0;
f3eb5384
SW		 2931 /*
2932 * A tidaw can address 4k of memory, but must not cross page boundaries
2933 * We can let the block layer handle this by setting
2934 * blk_queue_segment_boundary to page boundaries and
2935 * blk_max_segment_size to page size when setting up the request queue.
ef19298b
SW		 2936 * For write requests, a TIDAW must not cross track boundaries, because
2937 * we have to set the CBC flag on the last tidaw for each track.
f3eb5384 2938 */
ef19298b
SW		 2939 if (rq_data_dir(req) == WRITE) {
2940 new_track = 1;
2941 recid = first_rec;
2942 rq_for_each_segment(bv, req, iter) {
2943 dst = page_address(bv->bv_page) + bv->bv_offset;
2944 seg_len = bv->bv_len;
2945 while (seg_len) {
2946 if (new_track) {
2947 trkid = recid;
2948 offs = sector_div(trkid, blk_per_trk);
2949 count_to_trk_end = blk_per_trk - offs;
2950 count = min((last_rec - recid + 1),
2951 (sector_t)count_to_trk_end);
2952 len_to_track_end = count * blksize;
2953 recid += count;
2954 new_track = 0;
2955 }
2956 part_len = min(seg_len, len_to_track_end);
2957 seg_len -= part_len;
2958 len_to_track_end -= part_len;
2959 /* We need to end the tidaw at track end */
2960 if (!len_to_track_end) {
2961 new_track = 1;
2962 tidaw_flags = TIDAW_FLAGS_INSERT_CBC;
2963 } else
2964 tidaw_flags = 0;
2965 last_tidaw = itcw_add_tidaw(itcw, tidaw_flags,
2966 dst, part_len);
cd10502b
JL		 2967 if (IS_ERR(last_tidaw)) {
2968 ret = -EINVAL;
2969 goto out_error;
2970 }
ef19298b
SW		 2971 dst += part_len;
2972 }
2973 }
2974 } else {
2975 rq_for_each_segment(bv, req, iter) {
2976 dst = page_address(bv->bv_page) + bv->bv_offset;
2977 last_tidaw = itcw_add_tidaw(itcw, 0x00,
2978 dst, bv->bv_len);
cd10502b
JL		 2979 if (IS_ERR(last_tidaw)) {
2980 ret = -EINVAL;
2981 goto out_error;
2982 }
ef19298b 2983 }
f3eb5384 2984 }
ef19298b
SW		 2985 last_tidaw->flags |= TIDAW_FLAGS_LAST;
2986 last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC;
f3eb5384
SW		 2987 itcw_finalize(itcw);
2988
2989 if (blk_noretry_request(req) ||
2990 block->base->features & DASD_FEATURE_FAILFAST)
2991 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
ef19298b 2992 cqr->cpmode = 1;
f3eb5384
SW		 2993 cqr->startdev = startdev;
2994 cqr->memdev = startdev;
2995 cqr->block = block;
7c8faa86 2996 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
a4d26c6a 2997 cqr->lpm = startdev->path_data.ppm;
f3eb5384
SW		 2998 cqr->retries = 256;
2999 cqr->buildclk = get_clock();
3000 cqr->status = DASD_CQR_FILLED;
3001 return cqr;
cd10502b
JL		 3002out_error:
3003 dasd_sfree_request(cqr, startdev);
3004 return ERR_PTR(ret);
f3eb5384
SW		 3005}
3006
3007static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev,
3008 struct dasd_block *block,
3009 struct request *req)
3010{
ef19298b 3011 int cmdrtd, cmdwtd;
f3eb5384 3012 int use_prefix;
ef19298b 3013 int fcx_multitrack;
45b44d76 3014 struct dasd_eckd_private *private;
f3eb5384
SW		 3015 struct dasd_device *basedev;
3016 sector_t first_rec, last_rec;
3017 sector_t first_trk, last_trk;
3018 unsigned int first_offs, last_offs;
3019 unsigned int blk_per_trk, blksize;
3020 int cdlspecial;
ef19298b 3021 unsigned int data_size;
f3eb5384
SW		 3022 struct dasd_ccw_req *cqr;
3023
3024 basedev = block->base;
3025 private = (struct dasd_eckd_private *) basedev->private;
3026
3027 /* Calculate number of blocks/records per track. */
3028 blksize = block->bp_block;
3029 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
6fca97a9
SH		 3030 if (blk_per_trk == 0)
3031 return ERR_PTR(-EINVAL);
f3eb5384 3032 /* Calculate record id of first and last block. */
83096ebf 3033 first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift;
f3eb5384
SW		 3034 first_offs = sector_div(first_trk, blk_per_trk);
3035 last_rec = last_trk =
83096ebf 3036 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift;
f3eb5384
SW		 3037 last_offs = sector_div(last_trk, blk_per_trk);
3038 cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk);
3039
ef19298b
SW		 3040 fcx_multitrack = private->features.feature[40] & 0x20;
3041 data_size = blk_rq_bytes(req);
3042 /* tpm write request add CBC data on each track boundary */
3043 if (rq_data_dir(req) == WRITE)
3044 data_size += (last_trk - first_trk) * 4;
f3eb5384
SW		 3045
3046 /* is read track data and write track data in command mode supported? */
3047 cmdrtd = private->features.feature[9] & 0x20;
3048 cmdwtd = private->features.feature[12] & 0x40;
3049 use_prefix = private->features.feature[8] & 0x01;
3050
3051 cqr = NULL;
3052 if (cdlspecial || dasd_page_cache) {
3053 /* do nothing, just fall through to the cmd mode single case */
ef19298b
SW		 3054 } else if ((data_size <= private->fcx_max_data)
3055 && (fcx_multitrack || (first_trk == last_trk))) {
f3eb5384
SW		 3056 cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req,
3057 first_rec, last_rec,
3058 first_trk, last_trk,
3059 first_offs, last_offs,
3060 blk_per_trk, blksize);
ef19298b
SW		 3061 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) &&
3062 (PTR_ERR(cqr) != -ENOMEM))
f3eb5384
SW		 3063 cqr = NULL;
3064 } else if (use_prefix &&
3065 (((rq_data_dir(req) == READ) && cmdrtd) ||
3066 ((rq_data_dir(req) == WRITE) && cmdwtd))) {
3067 cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req,
3068 first_rec, last_rec,
3069 first_trk, last_trk,
3070 first_offs, last_offs,
3071 blk_per_trk, blksize);
ef19298b
SW		 3072 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) &&
3073 (PTR_ERR(cqr) != -ENOMEM))
f3eb5384
SW		 3074 cqr = NULL;
3075 }
3076 if (!cqr)
3077 cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req,
3078 first_rec, last_rec,
3079 first_trk, last_trk,
3080 first_offs, last_offs,
3081 blk_per_trk, blksize);
3082 return cqr;
3083}
3084
e4dbb0f2
SH		 3085static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev,
3086 struct dasd_block *block,
3087 struct request *req)
3088{
e4dbb0f2
SH		 3089 unsigned long *idaws;
3090 struct dasd_device *basedev;
3091 struct dasd_ccw_req *cqr;
3092 struct ccw1 *ccw;
3093 struct req_iterator iter;
3094 struct bio_vec *bv;
3095 char *dst;
3096 unsigned char cmd;
3097 unsigned int trkcount;
3098 unsigned int seg_len, len_to_track_end;
3099 unsigned int first_offs;
3100 unsigned int cidaw, cplength, datasize;
3101 sector_t first_trk, last_trk;
3102 unsigned int pfx_datasize;
3103
3104 /*
3105 * raw track access needs to be mutiple of 64k and on 64k boundary
3106 */
3107 if ((blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK) != 0) {
3108 cqr = ERR_PTR(-EINVAL);
3109 goto out;
3110 }
3111 if (((blk_rq_pos(req) + blk_rq_sectors(req)) %
3112 DASD_RAW_SECTORS_PER_TRACK) != 0) {
3113 cqr = ERR_PTR(-EINVAL);
3114 goto out;
3115 }
3116
3117 first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK;
3118 last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) /
3119 DASD_RAW_SECTORS_PER_TRACK;
3120 trkcount = last_trk - first_trk + 1;
3121 first_offs = 0;
3122 basedev = block->base;
e4dbb0f2
SH		 3123
3124 if (rq_data_dir(req) == READ)
3125 cmd = DASD_ECKD_CCW_READ_TRACK;
3126 else if (rq_data_dir(req) == WRITE)
3127 cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK;
3128 else {
3129 cqr = ERR_PTR(-EINVAL);
3130 goto out;
3131 }
3132
3133 /*
3134 * Raw track based I/O needs IDAWs for each page,
3135 * and not just for 64 bit addresses.
3136 */
3137 cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK;
3138
3139 /* 1x prefix + one read/write ccw per track */
3140 cplength = 1 + trkcount;
3141
3142 /*
3143 * struct PFX_eckd_data has up to 2 byte as extended parameter
3144 * this is needed for write full track and has to be mentioned
25985edc 3145 * separately
e4dbb0f2
SH		 3146 * add 8 instead of 2 to keep 8 byte boundary
3147 */
3148 pfx_datasize = sizeof(struct PFX_eckd_data) + 8;
3149
3150 datasize = pfx_datasize + cidaw * sizeof(unsigned long long);
3151
3152 /* Allocate the ccw request. */
3153 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength,
3154 datasize, startdev);
3155 if (IS_ERR(cqr))
3156 goto out;
3157 ccw = cqr->cpaddr;
3158
3159 if (prefix_LRE(ccw++, cqr->data, first_trk, last_trk, cmd,
3160 basedev, startdev, 1 /* format */, first_offs + 1,
3161 trkcount, 0, 0) == -EAGAIN) {
3162 /* Clock not in sync and XRC is enabled.
3163 * Try again later.
3164 */
3165 dasd_sfree_request(cqr, startdev);
3166 cqr = ERR_PTR(-EAGAIN);
3167 goto out;
3168 }
3169
3170 idaws = (unsigned long *)(cqr->data + pfx_datasize);
3171
3172 len_to_track_end = 0;
3173
3174 rq_for_each_segment(bv, req, iter) {
3175 dst = page_address(bv->bv_page) + bv->bv_offset;
3176 seg_len = bv->bv_len;
3177 if (!len_to_track_end) {
3178 ccw[-1].flags |= CCW_FLAG_CC;
3179 ccw->cmd_code = cmd;
3180 /* maximum 3390 track size */
3181 ccw->count = 57326;
3182 /* 64k map to one track */
3183 len_to_track_end = 65536;
3184 ccw->cda = (__u32)(addr_t)idaws;
3185 ccw->flags |= CCW_FLAG_IDA;
3186 ccw->flags |= CCW_FLAG_SLI;
3187 ccw++;
3188 }
3189 len_to_track_end -= seg_len;
3190 idaws = idal_create_words(idaws, dst, seg_len);
3191 }
3192
3193 if (blk_noretry_request(req) ||
3194 block->base->features & DASD_FEATURE_FAILFAST)
3195 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
3196 cqr->startdev = startdev;
3197 cqr->memdev = startdev;
3198 cqr->block = block;
3199 cqr->expires = startdev->default_expires * HZ;
3200 cqr->lpm = startdev->path_data.ppm;
3201 cqr->retries = 256;
3202 cqr->buildclk = get_clock();
3203 cqr->status = DASD_CQR_FILLED;
3204
3205 if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN)
3206 cqr = NULL;
3207out:
3208 return cqr;
3209}
3210
3211
1da177e4
LT		 3212static int
3213dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req)
3214{
3215 struct dasd_eckd_private *private;
3216 struct ccw1 *ccw;
5705f702 3217 struct req_iterator iter;
1da177e4
LT		 3218 struct bio_vec *bv;
3219 char *dst, *cda;
3220 unsigned int blksize, blk_per_trk, off;
3221 sector_t recid;
5705f702 3222 int status;
1da177e4
LT		 3223
3224 if (!dasd_page_cache)
3225 goto out;
8e09f215
SW		 3226 private = (struct dasd_eckd_private *) cqr->block->base->private;
3227 blksize = cqr->block->bp_block;
1da177e4 3228 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
83096ebf 3229 recid = blk_rq_pos(req) >> cqr->block->s2b_shift;
1da177e4
LT		 3230 ccw = cqr->cpaddr;
3231 /* Skip over define extent & locate record. */
3232 ccw++;
3233 if (private->uses_cdl == 0 || recid > 2*blk_per_trk)
3234 ccw++;
5705f702 3235 rq_for_each_segment(bv, req, iter) {
1da177e4
LT		 3236 dst = page_address(bv->bv_page) + bv->bv_offset;
3237 for (off = 0; off < bv->bv_len; off += blksize) {
3238 /* Skip locate record. */
3239 if (private->uses_cdl && recid <= 2*blk_per_trk)
3240 ccw++;
3241 if (dst) {
3242 if (ccw->flags & CCW_FLAG_IDA)
3243 cda = *((char **)((addr_t) ccw->cda));
3244 else
3245 cda = (char *)((addr_t) ccw->cda);
3246 if (dst != cda) {
3247 if (rq_data_dir(req) == READ)
3248 memcpy(dst, cda, bv->bv_len);
3249 kmem_cache_free(dasd_page_cache,
3250 (void *)((addr_t)cda & PAGE_MASK));
3251 }
3252 dst = NULL;
3253 }
3254 ccw++;
3255 recid++;
3256 }
3257 }
3258out:
3259 status = cqr->status == DASD_CQR_DONE;
8e09f215 3260 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 3261 return status;
3262}
3263
8e09f215 3264/*
f3eb5384 3265 * Modify ccw/tcw in cqr so it can be started on a base device.
8e09f215
SW		 3266 *
3267 * Note that this is not enough to restart the cqr!
3268 * Either reset cqr->startdev as well (summary unit check handling)
3269 * or restart via separate cqr (as in ERP handling).
3270 */
3271void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr)
3272{
3273 struct ccw1 *ccw;
3274 struct PFX_eckd_data *pfxdata;
f3eb5384
SW		 3275 struct tcw *tcw;
3276 struct tccb *tccb;
3277 struct dcw *dcw;
3278
3279 if (cqr->cpmode == 1) {
3280 tcw = cqr->cpaddr;
3281 tccb = tcw_get_tccb(tcw);
3282 dcw = (struct dcw *)&tccb->tca[0];
3283 pfxdata = (struct PFX_eckd_data *)&dcw->cd[0];
8e09f215
SW		 3284 pfxdata->validity.verify_base = 0;
3285 pfxdata->validity.hyper_pav = 0;
f3eb5384
SW		 3286 } else {
3287 ccw = cqr->cpaddr;
3288 pfxdata = cqr->data;
3289 if (ccw->cmd_code == DASD_ECKD_CCW_PFX) {
3290 pfxdata->validity.verify_base = 0;
3291 pfxdata->validity.hyper_pav = 0;
3292 }
8e09f215
SW		 3293 }
3294}
3295
3296#define DASD_ECKD_CHANQ_MAX_SIZE 4
3297
3298static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base,
3299 struct dasd_block *block,
3300 struct request *req)
3301{
3302 struct dasd_eckd_private *private;
3303 struct dasd_device *startdev;
3304 unsigned long flags;
3305 struct dasd_ccw_req *cqr;
3306
3307 startdev = dasd_alias_get_start_dev(base);
3308 if (!startdev)
3309 startdev = base;
3310 private = (struct dasd_eckd_private *) startdev->private;
3311 if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE)
3312 return ERR_PTR(-EBUSY);
3313
3314 spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags);
3315 private->count++;
e4dbb0f2
SH		 3316 if ((base->features & DASD_FEATURE_USERAW))
3317 cqr = dasd_raw_build_cp(startdev, block, req);
3318 else
3319 cqr = dasd_eckd_build_cp(startdev, block, req);
8e09f215
SW		 3320 if (IS_ERR(cqr))
3321 private->count--;
3322 spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags);
3323 return cqr;
3324}
3325
3326static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr,
3327 struct request *req)
3328{
3329 struct dasd_eckd_private *private;
3330 unsigned long flags;
3331
3332 spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags);
3333 private = (struct dasd_eckd_private *) cqr->memdev->private;
3334 private->count--;
3335 spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags);
3336 return dasd_eckd_free_cp(cqr, req);
3337}
3338
1da177e4
LT		 3339static int
3340dasd_eckd_fill_info(struct dasd_device * device,
3341 struct dasd_information2_t * info)
3342{
3343 struct dasd_eckd_private *private;
3344
3345 private = (struct dasd_eckd_private *) device->private;
3346 info->label_block = 2;
3347 info->FBA_layout = private->uses_cdl ? 0 : 1;
3348 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL;
3349 info->characteristics_size = sizeof(struct dasd_eckd_characteristics);
3350 memcpy(info->characteristics, &private->rdc_data,
3351 sizeof(struct dasd_eckd_characteristics));
4abb08c2
SW		 3352 info->confdata_size = min((unsigned long)private->conf_len,
3353 sizeof(info->configuration_data));
3354 memcpy(info->configuration_data, private->conf_data,
3355 info->confdata_size);
1da177e4
LT		 3356 return 0;
3357}
3358
3359/*
3360 * SECTION: ioctl functions for eckd devices.
3361 */
3362
3363/*
3364 * Release device ioctl.
138c014d 3365 * Buils a channel programm to releases a prior reserved
1da177e4
LT		 3366 * (see dasd_eckd_reserve) device.
3367 */
3368static int
1107ccfb 3369dasd_eckd_release(struct dasd_device *device)
1da177e4 3370{
1da177e4
LT		 3371 struct dasd_ccw_req *cqr;
3372 int rc;
f3eb5384 3373 struct ccw1 *ccw;
f932bcea 3374 int useglobal;
1da177e4
LT		 3375
3376 if (!capable(CAP_SYS_ADMIN))
3377 return -EACCES;
3378
f932bcea 3379 useglobal = 0;
68b781fe 3380 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
1da177e4 3381 if (IS_ERR(cqr)) {
f932bcea
SW		 3382 mutex_lock(&dasd_reserve_mutex);
3383 useglobal = 1;
3384 cqr = &dasd_reserve_req->cqr;
3385 memset(cqr, 0, sizeof(*cqr));
3386 memset(&dasd_reserve_req->ccw, 0,
3387 sizeof(dasd_reserve_req->ccw));
3388 cqr->cpaddr = &dasd_reserve_req->ccw;
3389 cqr->data = &dasd_reserve_req->data;
3390 cqr->magic = DASD_ECKD_MAGIC;
1da177e4 3391 }
f3eb5384
SW		 3392 ccw = cqr->cpaddr;
3393 ccw->cmd_code = DASD_ECKD_CCW_RELEASE;
3394 ccw->flags |= CCW_FLAG_SLI;
3395 ccw->count = 32;
3396 ccw->cda = (__u32)(addr_t) cqr->data;
8e09f215
SW		 3397 cqr->startdev = device;
3398 cqr->memdev = device;
1da177e4 3399 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 3400 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
336c340b 3401 cqr->retries = 2; /* set retry counter to enable basic ERP */
1da177e4
LT		 3402 cqr->expires = 2 * HZ;
3403 cqr->buildclk = get_clock();
3404 cqr->status = DASD_CQR_FILLED;
3405
3406 rc = dasd_sleep_on_immediatly(cqr);
5a27e60d
SW		 3407 if (!rc)
3408 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags);
1da177e4 3409
f932bcea
SW		 3410 if (useglobal)
3411 mutex_unlock(&dasd_reserve_mutex);
3412 else
3413 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 3414 return rc;
3415}
3416
3417/*
3418 * Reserve device ioctl.
3419 * Options are set to 'synchronous wait for interrupt' and
138c014d
HH		 3420 * 'timeout the request'. This leads to a terminate IO if
3421 * the interrupt is outstanding for a certain time.
1da177e4
LT		 3422 */
3423static int
1107ccfb 3424dasd_eckd_reserve(struct dasd_device *device)
1da177e4 3425{
1da177e4
LT		 3426 struct dasd_ccw_req *cqr;
3427 int rc;
f3eb5384 3428 struct ccw1 *ccw;
f932bcea 3429 int useglobal;
1da177e4
LT		 3430
3431 if (!capable(CAP_SYS_ADMIN))
3432 return -EACCES;
3433
f932bcea 3434 useglobal = 0;
68b781fe 3435 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
1da177e4 3436 if (IS_ERR(cqr)) {
f932bcea
SW		 3437 mutex_lock(&dasd_reserve_mutex);
3438 useglobal = 1;
3439 cqr = &dasd_reserve_req->cqr;
3440 memset(cqr, 0, sizeof(*cqr));
3441 memset(&dasd_reserve_req->ccw, 0,
3442 sizeof(dasd_reserve_req->ccw));
3443 cqr->cpaddr = &dasd_reserve_req->ccw;
3444 cqr->data = &dasd_reserve_req->data;
3445 cqr->magic = DASD_ECKD_MAGIC;
1da177e4 3446 }
f3eb5384
SW		 3447 ccw = cqr->cpaddr;
3448 ccw->cmd_code = DASD_ECKD_CCW_RESERVE;
3449 ccw->flags |= CCW_FLAG_SLI;
3450 ccw->count = 32;
3451 ccw->cda = (__u32)(addr_t) cqr->data;
8e09f215
SW		 3452 cqr->startdev = device;
3453 cqr->memdev = device;
1da177e4 3454 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 3455 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
336c340b 3456 cqr->retries = 2; /* set retry counter to enable basic ERP */
1da177e4
LT		 3457 cqr->expires = 2 * HZ;
3458 cqr->buildclk = get_clock();
3459 cqr->status = DASD_CQR_FILLED;
3460
3461 rc = dasd_sleep_on_immediatly(cqr);
5a27e60d
SW		 3462 if (!rc)
3463 set_bit(DASD_FLAG_IS_RESERVED, &device->flags);
1da177e4 3464
f932bcea
SW		 3465 if (useglobal)
3466 mutex_unlock(&dasd_reserve_mutex);
3467 else
3468 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 3469 return rc;
3470}
3471
3472/*
3473 * Steal lock ioctl - unconditional reserve device.
138c014d 3474 * Buils a channel programm to break a device's reservation.
1da177e4
LT		 3475 * (unconditional reserve)
3476 */
3477static int
1107ccfb 3478dasd_eckd_steal_lock(struct dasd_device *device)
1da177e4 3479{
1da177e4
LT		 3480 struct dasd_ccw_req *cqr;
3481 int rc;
f3eb5384 3482 struct ccw1 *ccw;
f932bcea 3483 int useglobal;
1da177e4
LT		 3484
3485 if (!capable(CAP_SYS_ADMIN))
3486 return -EACCES;
3487
f932bcea 3488 useglobal = 0;
68b781fe 3489 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
1da177e4 3490 if (IS_ERR(cqr)) {
f932bcea
SW		 3491 mutex_lock(&dasd_reserve_mutex);
3492 useglobal = 1;
3493 cqr = &dasd_reserve_req->cqr;
3494 memset(cqr, 0, sizeof(*cqr));
3495 memset(&dasd_reserve_req->ccw, 0,
3496 sizeof(dasd_reserve_req->ccw));
3497 cqr->cpaddr = &dasd_reserve_req->ccw;
3498 cqr->data = &dasd_reserve_req->data;
3499 cqr->magic = DASD_ECKD_MAGIC;
1da177e4 3500 }
f3eb5384
SW		 3501 ccw = cqr->cpaddr;
3502 ccw->cmd_code = DASD_ECKD_CCW_SLCK;
3503 ccw->flags |= CCW_FLAG_SLI;
3504 ccw->count = 32;
3505 ccw->cda = (__u32)(addr_t) cqr->data;
8e09f215
SW		 3506 cqr->startdev = device;
3507 cqr->memdev = device;
1da177e4 3508 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 3509 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
336c340b 3510 cqr->retries = 2; /* set retry counter to enable basic ERP */
1da177e4
LT		 3511 cqr->expires = 2 * HZ;
3512 cqr->buildclk = get_clock();
3513 cqr->status = DASD_CQR_FILLED;
3514
3515 rc = dasd_sleep_on_immediatly(cqr);
5a27e60d
SW		 3516 if (!rc)
3517 set_bit(DASD_FLAG_IS_RESERVED, &device->flags);
1da177e4 3518
f932bcea
SW		 3519 if (useglobal)
3520 mutex_unlock(&dasd_reserve_mutex);
3521 else
3522 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 3523 return rc;
3524}
3525
196339f1
SW		 3526/*
3527 * SNID - Sense Path Group ID
3528 * This ioctl may be used in situations where I/O is stalled due to
3529 * a reserve, so if the normal dasd_smalloc_request fails, we use the
3530 * preallocated dasd_reserve_req.
3531 */
3532static int dasd_eckd_snid(struct dasd_device *device,
3533 void __user *argp)
3534{
3535 struct dasd_ccw_req *cqr;
3536 int rc;
3537 struct ccw1 *ccw;
3538 int useglobal;
3539 struct dasd_snid_ioctl_data usrparm;
3540
3541 if (!capable(CAP_SYS_ADMIN))
3542 return -EACCES;
3543
3544 if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
3545 return -EFAULT;
3546
3547 useglobal = 0;
3548 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1,
3549 sizeof(struct dasd_snid_data), device);
3550 if (IS_ERR(cqr)) {
3551 mutex_lock(&dasd_reserve_mutex);
3552 useglobal = 1;
3553 cqr = &dasd_reserve_req->cqr;
3554 memset(cqr, 0, sizeof(*cqr));
3555 memset(&dasd_reserve_req->ccw, 0,
3556 sizeof(dasd_reserve_req->ccw));
3557 cqr->cpaddr = &dasd_reserve_req->ccw;
3558 cqr->data = &dasd_reserve_req->data;
3559 cqr->magic = DASD_ECKD_MAGIC;
3560 }
3561 ccw = cqr->cpaddr;
3562 ccw->cmd_code = DASD_ECKD_CCW_SNID;
3563 ccw->flags |= CCW_FLAG_SLI;
3564 ccw->count = 12;
3565 ccw->cda = (__u32)(addr_t) cqr->data;
3566 cqr->startdev = device;
3567 cqr->memdev = device;
3568 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
3569 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
5a27e60d 3570 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags);
196339f1
SW		 3571 cqr->retries = 5;
3572 cqr->expires = 10 * HZ;
3573 cqr->buildclk = get_clock();
3574 cqr->status = DASD_CQR_FILLED;
3575 cqr->lpm = usrparm.path_mask;
3576
3577 rc = dasd_sleep_on_immediatly(cqr);
3578 /* verify that I/O processing didn't modify the path mask */
3579 if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask))
3580 rc = -EIO;
3581 if (!rc) {
3582 usrparm.data = *((struct dasd_snid_data *)cqr->data);
3583 if (copy_to_user(argp, &usrparm, sizeof(usrparm)))
3584 rc = -EFAULT;
3585 }
3586
3587 if (useglobal)
3588 mutex_unlock(&dasd_reserve_mutex);
3589 else
3590 dasd_sfree_request(cqr, cqr->memdev);
3591 return rc;
3592}
3593
1da177e4
LT		 3594/*
3595 * Read performance statistics
3596 */
3597static int
1107ccfb 3598dasd_eckd_performance(struct dasd_device *device, void __user *argp)
1da177e4 3599{
1da177e4
LT		 3600 struct dasd_psf_prssd_data *prssdp;
3601 struct dasd_rssd_perf_stats_t *stats;
3602 struct dasd_ccw_req *cqr;
3603 struct ccw1 *ccw;
3604 int rc;
3605
68b781fe 3606 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
8e09f215
SW		 3607 (sizeof(struct dasd_psf_prssd_data) +
3608 sizeof(struct dasd_rssd_perf_stats_t)),
1da177e4
LT		 3609 device);
3610 if (IS_ERR(cqr)) {
fc19f381 3611 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 3612 "Could not allocate initialization request");
3613 return PTR_ERR(cqr);
3614 }
8e09f215
SW		 3615 cqr->startdev = device;
3616 cqr->memdev = device;
1da177e4 3617 cqr->retries = 0;
eb6e199b 3618 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1da177e4
LT		 3619 cqr->expires = 10 * HZ;
3620
3621 /* Prepare for Read Subsystem Data */
3622 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
8e09f215 3623 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
1da177e4 3624 prssdp->order = PSF_ORDER_PRSSD;
5d67d164 3625 prssdp->suborder = 0x01; /* Performance Statistics */
1da177e4
LT		 3626 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */
3627
3628 ccw = cqr->cpaddr;
3629 ccw->cmd_code = DASD_ECKD_CCW_PSF;
8e09f215 3630 ccw->count = sizeof(struct dasd_psf_prssd_data);
1da177e4
LT		 3631 ccw->flags |= CCW_FLAG_CC;
3632 ccw->cda = (__u32)(addr_t) prssdp;
3633
3634 /* Read Subsystem Data - Performance Statistics */
3635 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
8e09f215 3636 memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t));
1da177e4
LT		 3637
3638 ccw++;
3639 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
8e09f215 3640 ccw->count = sizeof(struct dasd_rssd_perf_stats_t);
1da177e4
LT		 3641 ccw->cda = (__u32)(addr_t) stats;
3642
3643 cqr->buildclk = get_clock();
3644 cqr->status = DASD_CQR_FILLED;
3645 rc = dasd_sleep_on(cqr);
3646 if (rc == 0) {
1da177e4
LT		 3647 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
3648 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
1107ccfb
CH		 3649 if (copy_to_user(argp, stats,
3650 sizeof(struct dasd_rssd_perf_stats_t)))
3651 rc = -EFAULT;
1da177e4 3652 }
8e09f215 3653 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 3654 return rc;
3655}
3656
3657/*
3658 * Get attributes (cache operations)
3659 * Returnes the cache attributes used in Define Extend (DE).
3660 */
3661static int
1107ccfb 3662dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp)
1da177e4 3663{
1107ccfb
CH		 3664 struct dasd_eckd_private *private =
3665 (struct dasd_eckd_private *)device->private;
3666 struct attrib_data_t attrib = private->attrib;
1da177e4
LT		 3667 int rc;
3668
3669 if (!capable(CAP_SYS_ADMIN))
3670 return -EACCES;
1107ccfb 3671 if (!argp)
1da177e4
LT		 3672 return -EINVAL;
3673
1107ccfb
CH		 3674 rc = 0;
3675 if (copy_to_user(argp, (long *) &attrib,
8e09f215 3676 sizeof(struct attrib_data_t)))
1107ccfb 3677 rc = -EFAULT;
1da177e4
LT		 3678
3679 return rc;
3680}
3681
3682/*
3683 * Set attributes (cache operations)
3684 * Stores the attributes for cache operation to be used in Define Extend (DE).
3685 */
3686static int
1107ccfb 3687dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp)
1da177e4 3688{
1107ccfb
CH		 3689 struct dasd_eckd_private *private =
3690 (struct dasd_eckd_private *)device->private;
1da177e4
LT		 3691 struct attrib_data_t attrib;
3692
3693 if (!capable(CAP_SYS_ADMIN))
3694 return -EACCES;
1107ccfb 3695 if (!argp)
1da177e4
LT		 3696 return -EINVAL;
3697
1107ccfb 3698 if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t)))
1da177e4 3699 return -EFAULT;
1da177e4
LT		 3700 private->attrib = attrib;
3701
fc19f381
SH		 3702 dev_info(&device->cdev->dev,
3703 "The DASD cache mode was set to %x (%i cylinder prestage)\n",
3704 private->attrib.operation, private->attrib.nr_cyl);
1da177e4
LT		 3705 return 0;
3706}
3707
ab1d848f
NH		 3708/*
3709 * Issue syscall I/O to EMC Symmetrix array.
3710 * CCWs are PSF and RSSD
3711 */
3712static int dasd_symm_io(struct dasd_device *device, void __user *argp)
3713{
3714 struct dasd_symmio_parms usrparm;
3715 char *psf_data, *rssd_result;
3716 struct dasd_ccw_req *cqr;
3717 struct ccw1 *ccw;
52898025 3718 char psf0, psf1;
ab1d848f
NH		 3719 int rc;
3720
52898025
NH		 3721 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
3722 return -EACCES;
3723 psf0 = psf1 = 0;
3724
ab1d848f
NH		 3725 /* Copy parms from caller */
3726 rc = -EFAULT;
3727 if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
3728 goto out;
f8b06859
HC		 3729 if (is_compat_task() || sizeof(long) == 4) {
3730 /* Make sure pointers are sane even on 31 bit. */
ab1d848f 3731 rc = -EINVAL;
f8b06859
HC		 3732 if ((usrparm.psf_data >> 32) != 0)
3733 goto out;
3734 if ((usrparm.rssd_result >> 32) != 0)
3735 goto out;
3736 usrparm.psf_data &= 0x7fffffffULL;
3737 usrparm.rssd_result &= 0x7fffffffULL;
ab1d848f 3738 }
ab1d848f
NH		 3739 /* alloc I/O data area */
3740 psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA);
3741 rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA);
3742 if (!psf_data || !rssd_result) {
3743 rc = -ENOMEM;
3744 goto out_free;
3745 }
3746
3747 /* get syscall header from user space */
3748 rc = -EFAULT;
3749 if (copy_from_user(psf_data,
3750 (void __user *)(unsigned long) usrparm.psf_data,
3751 usrparm.psf_data_len))
3752 goto out_free;
52898025
NH		 3753 psf0 = psf_data[0];
3754 psf1 = psf_data[1];
ab1d848f
NH		 3755
3756 /* setup CCWs for PSF + RSSD */
68b781fe 3757 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device);
ab1d848f 3758 if (IS_ERR(cqr)) {
fc19f381 3759 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
ab1d848f
NH		 3760 "Could not allocate initialization request");
3761 rc = PTR_ERR(cqr);
3762 goto out_free;
3763 }
3764
3765 cqr->startdev = device;
3766 cqr->memdev = device;
3767 cqr->retries = 3;
3768 cqr->expires = 10 * HZ;
3769 cqr->buildclk = get_clock();
3770 cqr->status = DASD_CQR_FILLED;
3771
3772 /* Build the ccws */
3773 ccw = cqr->cpaddr;
3774
3775 /* PSF ccw */
3776 ccw->cmd_code = DASD_ECKD_CCW_PSF;
3777 ccw->count = usrparm.psf_data_len;
3778 ccw->flags |= CCW_FLAG_CC;
3779 ccw->cda = (__u32)(addr_t) psf_data;
3780
3781 ccw++;
3782
3783 /* RSSD ccw */
3784 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
3785 ccw->count = usrparm.rssd_result_len;
3786 ccw->flags = CCW_FLAG_SLI ;
3787 ccw->cda = (__u32)(addr_t) rssd_result;
3788
3789 rc = dasd_sleep_on(cqr);
3790 if (rc)
3791 goto out_sfree;
3792
3793 rc = -EFAULT;
3794 if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result,
3795 rssd_result, usrparm.rssd_result_len))
3796 goto out_sfree;
3797 rc = 0;
3798
3799out_sfree:
3800 dasd_sfree_request(cqr, cqr->memdev);
3801out_free:
3802 kfree(rssd_result);
3803 kfree(psf_data);
3804out:
52898025
NH		 3805 DBF_DEV_EVENT(DBF_WARNING, device,
3806 "Symmetrix ioctl (0x%02x 0x%02x): rc=%d",
3807 (int) psf0, (int) psf1, rc);
ab1d848f
NH		 3808 return rc;
3809}
3810
1107ccfb 3811static int
8e09f215 3812dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp)
1107ccfb 3813{
8e09f215
SW		 3814 struct dasd_device *device = block->base;
3815
1107ccfb
CH		 3816 switch (cmd) {
3817 case BIODASDGATTR:
3818 return dasd_eckd_get_attrib(device, argp);
3819 case BIODASDSATTR:
3820 return dasd_eckd_set_attrib(device, argp);
3821 case BIODASDPSRD:
3822 return dasd_eckd_performance(device, argp);
3823 case BIODASDRLSE:
3824 return dasd_eckd_release(device);
3825 case BIODASDRSRV:
3826 return dasd_eckd_reserve(device);
3827 case BIODASDSLCK:
3828 return dasd_eckd_steal_lock(device);
196339f1
SW		 3829 case BIODASDSNID:
3830 return dasd_eckd_snid(device, argp);
ab1d848f
NH		 3831 case BIODASDSYMMIO:
3832 return dasd_symm_io(device, argp);
1107ccfb 3833 default:
6b79d14e 3834 return -ENOTTY;
1107ccfb
CH		 3835 }
3836}
3837
445b5b49
HH		 3838/*
3839 * Dump the range of CCWs into 'page' buffer
3840 * and return number of printed chars.
3841 */
4d284cac 3842static int
445b5b49
HH		 3843dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page)
3844{
3845 int len, count;
3846 char *datap;
3847
3848 len = 0;
3849 while (from <= to) {
773bab4a 3850 len += sprintf(page + len, PRINTK_HEADER
445b5b49
HH		 3851 " CCW %p: %08X %08X DAT:",
3852 from, ((int *) from)[0], ((int *) from)[1]);
3853
3854 /* get pointer to data (consider IDALs) */
3855 if (from->flags & CCW_FLAG_IDA)
3856 datap = (char *) *((addr_t *) (addr_t) from->cda);
3857 else
3858 datap = (char *) ((addr_t) from->cda);
3859
3860 /* dump data (max 32 bytes) */
3861 for (count = 0; count < from->count && count < 32; count++) {
3862 if (count % 8 == 0) len += sprintf(page + len, " ");
3863 if (count % 4 == 0) len += sprintf(page + len, " ");
3864 len += sprintf(page + len, "%02x", datap[count]);
3865 }
3866 len += sprintf(page + len, "\n");
3867 from++;
3868 }
3869 return len;
3870}
3871
fc19f381 3872static void
aeec92ca
SH		 3873dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb,
3874 char *reason)
fc19f381
SH		 3875{
3876 u64 *sense;
a5a0061f 3877 u64 *stat;
aeec92ca
SH		 3878
3879 sense = (u64 *) dasd_get_sense(irb);
a5a0061f 3880 stat = (u64 *) &irb->scsw;
fc19f381 3881 if (sense) {
a5a0061f
SW		 3882 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : "
3883 "%016llx %016llx %016llx %016llx",
3884 reason, *stat, *((u32 *) (stat + 1)),
ed3640b2 3885 sense[0], sense[1], sense[2], sense[3]);
fc19f381 3886 } else {
a5a0061f
SW		 3887 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s",
3888 reason, *stat, *((u32 *) (stat + 1)),
3889 "NO VALID SENSE");
fc19f381
SH		 3890 }
3891}
3892
1da177e4
LT		 3893/*
3894 * Print sense data and related channel program.
3895 * Parts are printed because printk buffer is only 1024 bytes.
3896 */
f3eb5384 3897static void dasd_eckd_dump_sense_ccw(struct dasd_device *device,
8e09f215 3898 struct dasd_ccw_req *req, struct irb *irb)
1da177e4
LT		 3899{
3900 char *page;
445b5b49
HH		 3901 struct ccw1 *first, *last, *fail, *from, *to;
3902 int len, sl, sct;
1da177e4
LT		 3903
3904 page = (char *) get_zeroed_page(GFP_ATOMIC);
3905 if (page == NULL) {
fc19f381
SH		 3906 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
3907 "No memory to dump sense data\n");
1da177e4
LT		 3908 return;
3909 }
445b5b49 3910 /* dump the sense data */
773bab4a 3911 len = sprintf(page, PRINTK_HEADER
1da177e4 3912 " I/O status report for device %s:\n",
2a0217d5 3913 dev_name(&device->cdev->dev));
773bab4a 3914 len += sprintf(page + len, PRINTK_HEADER
a5a0061f
SW		 3915 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
3916 "CS:%02X RC:%d\n",
3917 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw),
3918 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw),
3919 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw),
3920 req ? req->intrc : 0);
773bab4a 3921 len += sprintf(page + len, PRINTK_HEADER
1da177e4 3922 " device %s: Failing CCW: %p\n",
2a0217d5 3923 dev_name(&device->cdev->dev),
23d805b6 3924 (void *) (addr_t) irb->scsw.cmd.cpa);
1da177e4
LT		 3925 if (irb->esw.esw0.erw.cons) {
3926 for (sl = 0; sl < 4; sl++) {
773bab4a 3927 len += sprintf(page + len, PRINTK_HEADER
1da177e4
LT		 3928 " Sense(hex) %2d-%2d:",
3929 (8 * sl), ((8 * sl) + 7));
3930
3931 for (sct = 0; sct < 8; sct++) {
3932 len += sprintf(page + len, " %02x",
3933 irb->ecw[8 * sl + sct]);
3934 }
3935 len += sprintf(page + len, "\n");
3936 }
3937
3938 if (irb->ecw[27] & DASD_SENSE_BIT_0) {
3939 /* 24 Byte Sense Data */
773bab4a 3940 sprintf(page + len, PRINTK_HEADER
445b5b49
HH		 3941 " 24 Byte: %x MSG %x, "
3942 "%s MSGb to SYSOP\n",
3943 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f,
3944 irb->ecw[1] & 0x10 ? "" : "no");
1da177e4
LT		 3945 } else {
3946 /* 32 Byte Sense Data */
773bab4a 3947 sprintf(page + len, PRINTK_HEADER
445b5b49
HH		 3948 " 32 Byte: Format: %x "
3949 "Exception class %x\n",
3950 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4);
1da177e4
LT		 3951 }
3952 } else {
773bab4a 3953 sprintf(page + len, PRINTK_HEADER
445b5b49 3954 " SORRY - NO VALID SENSE AVAILABLE\n");
1da177e4 3955 }
773bab4a 3956 printk(KERN_ERR "%s", page);
445b5b49 3957
8e09f215
SW		 3958 if (req) {
3959 /* req == NULL for unsolicited interrupts */
3960 /* dump the Channel Program (max 140 Bytes per line) */
3961 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */
3962 first = req->cpaddr;
3963 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++);
3964 to = min(first + 6, last);
773bab4a 3965 len = sprintf(page, PRINTK_HEADER
8e09f215
SW		 3966 " Related CP in req: %p\n", req);
3967 dasd_eckd_dump_ccw_range(first, to, page + len);
773bab4a 3968 printk(KERN_ERR "%s", page);
1da177e4 3969
8e09f215
SW		 3970 /* print failing CCW area (maximum 4) */
3971 /* scsw->cda is either valid or zero */
3972 len = 0;
3973 from = ++to;
23d805b6
PO		 3974 fail = (struct ccw1 *)(addr_t)
3975 irb->scsw.cmd.cpa; /* failing CCW */
8e09f215
SW		 3976 if (from < fail - 2) {
3977 from = fail - 2; /* there is a gap - print header */
773bab4a 3978 len += sprintf(page, PRINTK_HEADER "......\n");
8e09f215
SW		 3979 }
3980 to = min(fail + 1, last);
3981 len += dasd_eckd_dump_ccw_range(from, to, page + len);
3982
3983 /* print last CCWs (maximum 2) */
3984 from = max(from, ++to);
3985 if (from < last - 1) {
3986 from = last - 1; /* there is a gap - print header */
773bab4a 3987 len += sprintf(page + len, PRINTK_HEADER "......\n");
8e09f215
SW		 3988 }
3989 len += dasd_eckd_dump_ccw_range(from, last, page + len);
3990 if (len > 0)
773bab4a 3991 printk(KERN_ERR "%s", page);
1da177e4 3992 }
1da177e4
LT		 3993 free_page((unsigned long) page);
3994}
3995
f3eb5384
SW		 3996
3997/*
3998 * Print sense data from a tcw.
3999 */
4000static void dasd_eckd_dump_sense_tcw(struct dasd_device *device,
4001 struct dasd_ccw_req *req, struct irb *irb)
4002{
4003 char *page;
4004 int len, sl, sct, residual;
f3eb5384 4005 struct tsb *tsb;
ef19298b 4006 u8 *sense, *rcq;
f3eb5384
SW		 4007
4008 page = (char *) get_zeroed_page(GFP_ATOMIC);
4009 if (page == NULL) {
fc19f381 4010 DBF_DEV_EVENT(DBF_WARNING, device, " %s",
f3eb5384
SW		 4011 "No memory to dump sense data");
4012 return;
4013 }
4014 /* dump the sense data */
773bab4a 4015 len = sprintf(page, PRINTK_HEADER
f3eb5384
SW		 4016 " I/O status report for device %s:\n",
4017 dev_name(&device->cdev->dev));
773bab4a 4018 len += sprintf(page + len, PRINTK_HEADER
a5a0061f
SW		 4019 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
4020 "CS:%02X fcxs:%02X schxs:%02X RC:%d\n",
4021 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw),
4022 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw),
4023 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw),
4024 irb->scsw.tm.fcxs, irb->scsw.tm.schxs,
4025 req ? req->intrc : 0);
773bab4a 4026 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4027 " device %s: Failing TCW: %p\n",
4028 dev_name(&device->cdev->dev),
4029 (void *) (addr_t) irb->scsw.tm.tcw);
4030
4031 tsb = NULL;
4032 sense = NULL;
a5a0061f 4033 if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01))
f3eb5384
SW		 4034 tsb = tcw_get_tsb(
4035 (struct tcw *)(unsigned long)irb->scsw.tm.tcw);
4036
b8fde722 4037 if (tsb) {
773bab4a 4038 len += sprintf(page + len, PRINTK_HEADER
f3eb5384 4039 " tsb->length %d\n", tsb->length);
773bab4a 4040 len += sprintf(page + len, PRINTK_HEADER
f3eb5384 4041 " tsb->flags %x\n", tsb->flags);
773bab4a 4042 len += sprintf(page + len, PRINTK_HEADER
f3eb5384 4043 " tsb->dcw_offset %d\n", tsb->dcw_offset);
773bab4a 4044 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4045 " tsb->count %d\n", tsb->count);
4046 residual = tsb->count - 28;
773bab4a 4047 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4048 " residual %d\n", residual);
4049
4050 switch (tsb->flags & 0x07) {
4051 case 1: /* tsa_iostat */
773bab4a 4052 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4053 " tsb->tsa.iostat.dev_time %d\n",
4054 tsb->tsa.iostat.dev_time);
773bab4a 4055 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4056 " tsb->tsa.iostat.def_time %d\n",
4057 tsb->tsa.iostat.def_time);
773bab4a 4058 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4059 " tsb->tsa.iostat.queue_time %d\n",
4060 tsb->tsa.iostat.queue_time);
773bab4a 4061 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4062 " tsb->tsa.iostat.dev_busy_time %d\n",
4063 tsb->tsa.iostat.dev_busy_time);
773bab4a 4064 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4065 " tsb->tsa.iostat.dev_act_time %d\n",
4066 tsb->tsa.iostat.dev_act_time);
4067 sense = tsb->tsa.iostat.sense;
4068 break;
4069 case 2: /* ts_ddpc */
773bab4a 4070 len += sprintf(page + len, PRINTK_HEADER
f3eb5384 4071 " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc);
ef19298b 4072 for (sl = 0; sl < 2; sl++) {
773bab4a 4073 len += sprintf(page + len, PRINTK_HEADER
ef19298b
SW		 4074 " tsb->tsa.ddpc.rcq %2d-%2d: ",
4075 (8 * sl), ((8 * sl) + 7));
4076 rcq = tsb->tsa.ddpc.rcq;
f3eb5384
SW		 4077 for (sct = 0; sct < 8; sct++) {
4078 len += sprintf(page + len, " %02x",
ef19298b 4079 rcq[8 * sl + sct]);
f3eb5384
SW		 4080 }
4081 len += sprintf(page + len, "\n");
4082 }
4083 sense = tsb->tsa.ddpc.sense;
4084 break;
4085 case 3: /* tsa_intrg */
773bab4a
SO		 4086 len += sprintf(page + len, PRINTK_HEADER
4087 " tsb->tsa.intrg.: not supportet yet\n");
f3eb5384
SW		 4088 break;
4089 }
4090
4091 if (sense) {
4092 for (sl = 0; sl < 4; sl++) {
773bab4a 4093 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4094 " Sense(hex) %2d-%2d:",
4095 (8 * sl), ((8 * sl) + 7));
4096 for (sct = 0; sct < 8; sct++) {
4097 len += sprintf(page + len, " %02x",
4098 sense[8 * sl + sct]);
4099 }
4100 len += sprintf(page + len, "\n");
4101 }
4102
4103 if (sense[27] & DASD_SENSE_BIT_0) {
4104 /* 24 Byte Sense Data */
773bab4a 4105 sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4106 " 24 Byte: %x MSG %x, "
4107 "%s MSGb to SYSOP\n",
4108 sense[7] >> 4, sense[7] & 0x0f,
4109 sense[1] & 0x10 ? "" : "no");
4110 } else {
4111 /* 32 Byte Sense Data */
773bab4a 4112 sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4113 " 32 Byte: Format: %x "
4114 "Exception class %x\n",
4115 sense[6] & 0x0f, sense[22] >> 4);
4116 }
4117 } else {
773bab4a 4118 sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4119 " SORRY - NO VALID SENSE AVAILABLE\n");
4120 }
4121 } else {
773bab4a 4122 sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4123 " SORRY - NO TSB DATA AVAILABLE\n");
4124 }
773bab4a 4125 printk(KERN_ERR "%s", page);
f3eb5384
SW		 4126 free_page((unsigned long) page);
4127}
4128
4129static void dasd_eckd_dump_sense(struct dasd_device *device,
4130 struct dasd_ccw_req *req, struct irb *irb)
4131{
a5a0061f 4132 if (scsw_is_tm(&irb->scsw))
f3eb5384
SW		 4133 dasd_eckd_dump_sense_tcw(device, req, irb);
4134 else
4135 dasd_eckd_dump_sense_ccw(device, req, irb);
4136}
4137
501183f2 4138static int dasd_eckd_pm_freeze(struct dasd_device *device)
d41dd122
SH		 4139{
4140 /*
4141 * the device should be disconnected from our LCU structure
4142 * on restore we will reconnect it and reread LCU specific
4143 * information like PAV support that might have changed
4144 */
4145 dasd_alias_remove_device(device);
4146 dasd_alias_disconnect_device_from_lcu(device);
4147
4148 return 0;
4149}
4150
501183f2 4151static int dasd_eckd_restore_device(struct dasd_device *device)
d41dd122
SH		 4152{
4153 struct dasd_eckd_private *private;
6fca97a9 4154 struct dasd_eckd_characteristics temp_rdc_data;
f9f8d02f 4155 int rc;
d41dd122 4156 struct dasd_uid temp_uid;
a7602f6c 4157 unsigned long flags;
d41dd122 4158
d41dd122
SH		 4159 private = (struct dasd_eckd_private *) device->private;
4160
4161 /* Read Configuration Data */
4162 rc = dasd_eckd_read_conf(device);
4163 if (rc)
4164 goto out_err;
4165
2dedf0d9
SH		 4166 dasd_eckd_get_uid(device, &temp_uid);
4167 /* Generate device unique id */
4168 rc = dasd_eckd_generate_uid(device);
4169 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
d41dd122 4170 if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0)
a7602f6c
SH		 4171 dev_err(&device->cdev->dev, "The UID of the DASD has "
4172 "changed\n");
2dedf0d9 4173 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
d41dd122
SH		 4174 if (rc)
4175 goto out_err;
d41dd122
SH		 4176
4177 /* register lcu with alias handling, enable PAV if this is a new lcu */
f9f8d02f
SH		 4178 rc = dasd_alias_make_device_known_to_lcu(device);
4179 if (rc)
4180 return rc;
12d7b107 4181 dasd_eckd_validate_server(device, DASD_CQR_FLAGS_FAILFAST);
f4ac1d02
SW		 4182
4183 /* RE-Read Configuration Data */
4184 rc = dasd_eckd_read_conf(device);
4185 if (rc)
4186 goto out_err;
d41dd122
SH		 4187
4188 /* Read Feature Codes */
68d1e5f0 4189 dasd_eckd_read_features(device);
d41dd122
SH		 4190
4191 /* Read Device Characteristics */
68b781fe 4192 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
6fca97a9 4193 &temp_rdc_data, 64);
d41dd122 4194 if (rc) {
b8ed5dd5
SH		 4195 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
4196 "Read device characteristic failed, rc=%d", rc);
d41dd122
SH		 4197 goto out_err;
4198 }
a7602f6c 4199 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
6fca97a9 4200 memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data));
a7602f6c 4201 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
d41dd122
SH		 4202
4203 /* add device to alias management */
4204 dasd_alias_add_device(device);
4205
4206 return 0;
4207
4208out_err:
e6125fba 4209 return -1;
d41dd122
SH		 4210}
4211
501183f2
SH		 4212static int dasd_eckd_reload_device(struct dasd_device *device)
4213{
4214 struct dasd_eckd_private *private;
4215 int rc, old_base;
2dedf0d9
SH		 4216 char print_uid[60];
4217 struct dasd_uid uid;
4218 unsigned long flags;
501183f2
SH		 4219
4220 private = (struct dasd_eckd_private *) device->private;
2dedf0d9
SH		 4221
4222 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
501183f2 4223 old_base = private->uid.base_unit_addr;
2dedf0d9
SH		 4224 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
4225
501183f2
SH		 4226 /* Read Configuration Data */
4227 rc = dasd_eckd_read_conf(device);
4228 if (rc)
4229 goto out_err;
4230
2dedf0d9 4231 rc = dasd_eckd_generate_uid(device);
501183f2
SH		 4232 if (rc)
4233 goto out_err;
501183f2
SH		 4234 /*
4235 * update unit address configuration and
4236 * add device to alias management
4237 */
4238 dasd_alias_update_add_device(device);
4239
2dedf0d9
SH		 4240 dasd_eckd_get_uid(device, &uid);
4241
4242 if (old_base != uid.base_unit_addr) {
4243 if (strlen(uid.vduit) > 0)
4244 snprintf(print_uid, sizeof(print_uid),
4245 "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial,
4246 uid.ssid, uid.base_unit_addr, uid.vduit);
501183f2 4247 else
2dedf0d9
SH		 4248 snprintf(print_uid, sizeof(print_uid),
4249 "%s.%s.%04x.%02x", uid.vendor, uid.serial,
4250 uid.ssid, uid.base_unit_addr);
501183f2
SH		 4251
4252 dev_info(&device->cdev->dev,
4253 "An Alias device was reassigned to a new base device "
2dedf0d9 4254 "with UID: %s\n", print_uid);
501183f2
SH		 4255 }
4256 return 0;
4257
4258out_err:
4259 return -1;
4260}
4261
d41dd122 4262static struct ccw_driver dasd_eckd_driver = {
3bda058b
SO		 4263 .driver = {
4264 .name = "dasd-eckd",
4265 .owner = THIS_MODULE,
4266 },
d41dd122
SH		 4267 .ids = dasd_eckd_ids,
4268 .probe = dasd_eckd_probe,
4269 .remove = dasd_generic_remove,
4270 .set_offline = dasd_generic_set_offline,
4271 .set_online = dasd_eckd_set_online,
4272 .notify = dasd_generic_notify,
a4d26c6a 4273 .path_event = dasd_generic_path_event,
4679e893 4274 .shutdown = dasd_generic_shutdown,
d41dd122
SH		 4275 .freeze = dasd_generic_pm_freeze,
4276 .thaw = dasd_generic_restore_device,
4277 .restore = dasd_generic_restore_device,
a23ed009 4278 .uc_handler = dasd_generic_uc_handler,
de400d6b 4279 .int_class = IOINT_DAS,
d41dd122 4280};
f3eb5384 4281
1da177e4
LT		 4282/*
4283 * max_blocks is dependent on the amount of storage that is available
4284 * in the static io buffer for each device. Currently each device has
4285 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has
4286 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use
4287 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In
4288 * addition we have one define extent ccw + 16 bytes of data and one
4289 * locate record ccw + 16 bytes of data. That makes:
4290 * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum.
4291 * We want to fit two into the available memory so that we can immediately
4292 * start the next request if one finishes off. That makes 249.5 blocks
4293 * for one request. Give a little safety and the result is 240.
4294 */
4295static struct dasd_discipline dasd_eckd_discipline = {
4296 .owner = THIS_MODULE,
4297 .name = "ECKD",
4298 .ebcname = "ECKD",
ef19298b 4299 .max_blocks = 190,
1da177e4 4300 .check_device = dasd_eckd_check_characteristics,
8e09f215 4301 .uncheck_device = dasd_eckd_uncheck_device,
1da177e4 4302 .do_analysis = dasd_eckd_do_analysis,
a4d26c6a 4303 .verify_path = dasd_eckd_verify_path,
8e09f215
SW		 4304 .ready_to_online = dasd_eckd_ready_to_online,
4305 .online_to_ready = dasd_eckd_online_to_ready,
1da177e4
LT		 4306 .fill_geometry = dasd_eckd_fill_geometry,
4307 .start_IO = dasd_start_IO,
4308 .term_IO = dasd_term_IO,
8e09f215 4309 .handle_terminated_request = dasd_eckd_handle_terminated_request,
1da177e4 4310 .format_device = dasd_eckd_format_device,
1da177e4
LT		 4311 .erp_action = dasd_eckd_erp_action,
4312 .erp_postaction = dasd_eckd_erp_postaction,
5a27e60d 4313 .check_for_device_change = dasd_eckd_check_for_device_change,
8e09f215
SW		 4314 .build_cp = dasd_eckd_build_alias_cp,
4315 .free_cp = dasd_eckd_free_alias_cp,
1da177e4 4316 .dump_sense = dasd_eckd_dump_sense,
fc19f381 4317 .dump_sense_dbf = dasd_eckd_dump_sense_dbf,
1da177e4 4318 .fill_info = dasd_eckd_fill_info,
1107ccfb 4319 .ioctl = dasd_eckd_ioctl,
d41dd122
SH		 4320 .freeze = dasd_eckd_pm_freeze,
4321 .restore = dasd_eckd_restore_device,
501183f2 4322 .reload = dasd_eckd_reload_device,
2dedf0d9 4323 .get_uid = dasd_eckd_get_uid,
f1633031 4324 .kick_validate = dasd_eckd_kick_validate_server,
1da177e4
LT		 4325};
4326
4327static int __init
4328dasd_eckd_init(void)
4329{
736e6ea0
SO		 4330 int ret;
4331
1da177e4 4332 ASCEBC(dasd_eckd_discipline.ebcname, 4);
f932bcea
SW		 4333 dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req),
4334 GFP_KERNEL | GFP_DMA);
4335 if (!dasd_reserve_req)
4336 return -ENOMEM;
a4d26c6a
SW		 4337 path_verification_worker = kmalloc(sizeof(*path_verification_worker),
4338 GFP_KERNEL | GFP_DMA);
4339 if (!path_verification_worker) {
4340 kfree(dasd_reserve_req);
4341 return -ENOMEM;
4342 }
736e6ea0
SO		 4343 ret = ccw_driver_register(&dasd_eckd_driver);
4344 if (!ret)
4345 wait_for_device_probe();
a4d26c6a
SW		 4346 else {
4347 kfree(path_verification_worker);
f932bcea 4348 kfree(dasd_reserve_req);
a4d26c6a 4349 }
736e6ea0 4350 return ret;
1da177e4
LT		 4351}
4352
4353static void __exit
4354dasd_eckd_cleanup(void)
4355{
4356 ccw_driver_unregister(&dasd_eckd_driver);
a4d26c6a 4357 kfree(path_verification_worker);
f932bcea 4358 kfree(dasd_reserve_req);
1da177e4
LT		 4359}
4360
4361module_init(dasd_eckd_init);
4362module_exit(dasd_eckd_cleanup);
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