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[S390] topology: use default MC domain initializer
[linux-block.git] / drivers / s390 / block / dasd_eckd.c
CommitLineData
138c014d 1/*
1da177e4
LT		 2 * File...........: linux/drivers/s390/block/dasd_eckd.c
3 * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
138c014d 4 * Horst Hummel <Horst.Hummel@de.ibm.com>
1da177e4
LT		 5 * Carsten Otte <Cotte@de.ibm.com>
6 * Martin Schwidefsky <schwidefsky@de.ibm.com>
7 * Bugreports.to..: <Linux390@de.ibm.com>
d41dd122 8 * Copyright IBM Corp. 1999, 2009
ab1d848f
NH		 9 * EMC Symmetrix ioctl Copyright EMC Corporation, 2008
10 * Author.........: Nigel Hislop <hislop_nigel@emc.com>
1da177e4
LT		 11 */
12
ca99dab0 13#define KMSG_COMPONENT "dasd-eckd"
fc19f381 14
1da177e4
LT		 15#include <linux/stddef.h>
16#include <linux/kernel.h>
17#include <linux/slab.h>
18#include <linux/hdreg.h> /* HDIO_GETGEO */
19#include <linux/bio.h>
20#include <linux/module.h>
21#include <linux/init.h>
22
23#include <asm/debug.h>
24#include <asm/idals.h>
25#include <asm/ebcdic.h>
f8b06859 26#include <asm/compat.h>
1da177e4 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"
f3eb5384
SW		 35#include "../cio/chsc.h"
36
1da177e4
LT		 37
38#ifdef PRINTK_HEADER
39#undef PRINTK_HEADER
40#endif /* PRINTK_HEADER */
41#define PRINTK_HEADER "dasd(eckd):"
42
43#define ECKD_C0(i) (i->home_bytes)
44#define ECKD_F(i) (i->formula)
45#define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\
46 (i->factors.f_0x02.f1))
47#define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\
48 (i->factors.f_0x02.f2))
49#define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\
50 (i->factors.f_0x02.f3))
51#define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0)
52#define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0)
53#define ECKD_F6(i) (i->factor6)
54#define ECKD_F7(i) (i->factor7)
55#define ECKD_F8(i) (i->factor8)
56
57MODULE_LICENSE("GPL");
58
59static struct dasd_discipline dasd_eckd_discipline;
60
1da177e4
LT		 61/* The ccw bus type uses this table to find devices that it sends to
62 * dasd_eckd_probe */
63static struct ccw_device_id dasd_eckd_ids[] = {
d2c993d8
HC		 64 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1},
65 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2},
66 { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3390, 0), .driver_info = 0x3},
67 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4},
68 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5},
69 { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6},
70 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7},
71 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8},
72 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9},
73 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa},
1da177e4
LT		 74 { /* end of list */ },
75};
76
77MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids);
78
79static struct ccw_driver dasd_eckd_driver; /* see below */
80
eb6e199b
SW		 81#define INIT_CQR_OK 0
82#define INIT_CQR_UNFORMATTED 1
83#define INIT_CQR_ERROR 2
84
85
1da177e4
LT		 86/* initial attempt at a probe function. this can be simplified once
87 * the other detection code is gone */
88static int
89dasd_eckd_probe (struct ccw_device *cdev)
90{
91 int ret;
92
40545573 93 /* set ECKD specific ccw-device options */
454e1fa1
PO		 94 ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE |
95 CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH);
40545573 96 if (ret) {
b8ed5dd5
SH		 97 DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s",
98 "dasd_eckd_probe: could not set "
99 "ccw-device options");
1da177e4 100 return ret;
40545573
HH		 101 }
102 ret = dasd_generic_probe(cdev, &dasd_eckd_discipline);
103 return ret;
1da177e4
LT		 104}
105
106static int
107dasd_eckd_set_online(struct ccw_device *cdev)
108{
40545573 109 return dasd_generic_set_online(cdev, &dasd_eckd_discipline);
1da177e4
LT		 110}
111
1da177e4
LT		 112static const int sizes_trk0[] = { 28, 148, 84 };
113#define LABEL_SIZE 140
114
115static inline unsigned int
116round_up_multiple(unsigned int no, unsigned int mult)
117{
118 int rem = no % mult;
119 return (rem ? no - rem + mult : no);
120}
121
122static inline unsigned int
123ceil_quot(unsigned int d1, unsigned int d2)
124{
125 return (d1 + (d2 - 1)) / d2;
126}
127
4d284cac 128static unsigned int
1da177e4
LT		 129recs_per_track(struct dasd_eckd_characteristics * rdc,
130 unsigned int kl, unsigned int dl)
131{
132 int dn, kn;
133
134 switch (rdc->dev_type) {
135 case 0x3380:
136 if (kl)
137 return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) +
138 ceil_quot(dl + 12, 32));
139 else
140 return 1499 / (15 + ceil_quot(dl + 12, 32));
141 case 0x3390:
142 dn = ceil_quot(dl + 6, 232) + 1;
143 if (kl) {
144 kn = ceil_quot(kl + 6, 232) + 1;
145 return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) +
146 9 + ceil_quot(dl + 6 * dn, 34));
147 } else
148 return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34));
149 case 0x9345:
150 dn = ceil_quot(dl + 6, 232) + 1;
151 if (kl) {
152 kn = ceil_quot(kl + 6, 232) + 1;
153 return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) +
154 ceil_quot(dl + 6 * dn, 34));
155 } else
156 return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34));
157 }
158 return 0;
159}
160
b44b0ab3
SW		 161static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head)
162{
163 geo->cyl = (__u16) cyl;
164 geo->head = cyl >> 16;
165 geo->head <<= 4;
166 geo->head |= head;
167}
168
4d284cac 169static int
1da177e4
LT		 170check_XRC (struct ccw1 *de_ccw,
171 struct DE_eckd_data *data,
172 struct dasd_device *device)
173{
174 struct dasd_eckd_private *private;
d54853ef 175 int rc;
1da177e4
LT		 176
177 private = (struct dasd_eckd_private *) device->private;
d54853ef
MS		 178 if (!private->rdc_data.facilities.XRC_supported)
179 return 0;
1da177e4
LT		 180
181 /* switch on System Time Stamp - needed for XRC Support */
d54853ef
MS		 182 data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */
183 data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */
1da177e4 184
d54853ef
MS		 185 rc = get_sync_clock(&data->ep_sys_time);
186 /* Ignore return code if sync clock is switched off. */
187 if (rc == -ENOSYS || rc == -EACCES)
188 rc = 0;
1da177e4 189
8e09f215 190 de_ccw->count = sizeof(struct DE_eckd_data);
d54853ef
MS		 191 de_ccw->flags |= CCW_FLAG_SLI;
192 return rc;
193}
1da177e4 194
4d284cac 195static int
b44b0ab3
SW		 196define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk,
197 unsigned int totrk, int cmd, struct dasd_device *device)
1da177e4
LT		 198{
199 struct dasd_eckd_private *private;
b44b0ab3
SW		 200 u32 begcyl, endcyl;
201 u16 heads, beghead, endhead;
d54853ef 202 int rc = 0;
1da177e4
LT		 203
204 private = (struct dasd_eckd_private *) device->private;
205
206 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT;
207 ccw->flags = 0;
208 ccw->count = 16;
209 ccw->cda = (__u32) __pa(data);
210
8e09f215 211 memset(data, 0, sizeof(struct DE_eckd_data));
1da177e4
LT		 212 switch (cmd) {
213 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
214 case DASD_ECKD_CCW_READ_RECORD_ZERO:
215 case DASD_ECKD_CCW_READ:
216 case DASD_ECKD_CCW_READ_MT:
217 case DASD_ECKD_CCW_READ_CKD:
218 case DASD_ECKD_CCW_READ_CKD_MT:
219 case DASD_ECKD_CCW_READ_KD:
220 case DASD_ECKD_CCW_READ_KD_MT:
221 case DASD_ECKD_CCW_READ_COUNT:
222 data->mask.perm = 0x1;
223 data->attributes.operation = private->attrib.operation;
224 break;
225 case DASD_ECKD_CCW_WRITE:
226 case DASD_ECKD_CCW_WRITE_MT:
227 case DASD_ECKD_CCW_WRITE_KD:
228 case DASD_ECKD_CCW_WRITE_KD_MT:
229 data->mask.perm = 0x02;
230 data->attributes.operation = private->attrib.operation;
d54853ef 231 rc = check_XRC (ccw, data, device);
1da177e4
LT		 232 break;
233 case DASD_ECKD_CCW_WRITE_CKD:
234 case DASD_ECKD_CCW_WRITE_CKD_MT:
235 data->attributes.operation = DASD_BYPASS_CACHE;
d54853ef 236 rc = check_XRC (ccw, data, device);
1da177e4
LT		 237 break;
238 case DASD_ECKD_CCW_ERASE:
239 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
240 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
241 data->mask.perm = 0x3;
242 data->mask.auth = 0x1;
243 data->attributes.operation = DASD_BYPASS_CACHE;
d54853ef 244 rc = check_XRC (ccw, data, device);
1da177e4
LT		 245 break;
246 default:
fc19f381
SH		 247 dev_err(&device->cdev->dev,
248 "0x%x is not a known command\n", cmd);
1da177e4
LT		 249 break;
250 }
251
252 data->attributes.mode = 0x3; /* ECKD */
253
254 if ((private->rdc_data.cu_type == 0x2105 ||
255 private->rdc_data.cu_type == 0x2107 ||
256 private->rdc_data.cu_type == 0x1750)
257 && !(private->uses_cdl && trk < 2))
258 data->ga_extended |= 0x40; /* Regular Data Format Mode */
259
b44b0ab3
SW		 260 heads = private->rdc_data.trk_per_cyl;
261 begcyl = trk / heads;
262 beghead = trk % heads;
263 endcyl = totrk / heads;
264 endhead = totrk % heads;
1da177e4
LT		 265
266 /* check for sequential prestage - enhance cylinder range */
267 if (data->attributes.operation == DASD_SEQ_PRESTAGE ||
268 data->attributes.operation == DASD_SEQ_ACCESS) {
138c014d 269
b44b0ab3
SW		 270 if (endcyl + private->attrib.nr_cyl < private->real_cyl)
271 endcyl += private->attrib.nr_cyl;
1da177e4 272 else
b44b0ab3 273 endcyl = (private->real_cyl - 1);
1da177e4
LT		 274 }
275
b44b0ab3
SW		 276 set_ch_t(&data->beg_ext, begcyl, beghead);
277 set_ch_t(&data->end_ext, endcyl, endhead);
d54853ef 278 return rc;
1da177e4
LT		 279}
280
8e09f215
SW		 281static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata,
282 struct dasd_device *device)
283{
284 struct dasd_eckd_private *private;
285 int rc;
286
287 private = (struct dasd_eckd_private *) device->private;
288 if (!private->rdc_data.facilities.XRC_supported)
289 return 0;
290
291 /* switch on System Time Stamp - needed for XRC Support */
f3eb5384
SW		 292 pfxdata->define_extent.ga_extended |= 0x08; /* 'Time Stamp Valid' */
293 pfxdata->define_extent.ga_extended |= 0x02; /* 'Extended Parameter' */
8e09f215
SW		 294 pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */
295
f3eb5384 296 rc = get_sync_clock(&pfxdata->define_extent.ep_sys_time);
8e09f215
SW		 297 /* Ignore return code if sync clock is switched off. */
298 if (rc == -ENOSYS || rc == -EACCES)
299 rc = 0;
300 return rc;
301}
302
f3eb5384
SW		 303static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk,
304 unsigned int rec_on_trk, int count, int cmd,
305 struct dasd_device *device, unsigned int reclen,
306 unsigned int tlf)
307{
308 struct dasd_eckd_private *private;
309 int sector;
310 int dn, d;
311
312 private = (struct dasd_eckd_private *) device->private;
313
314 memset(data, 0, sizeof(*data));
315 sector = 0;
316 if (rec_on_trk) {
317 switch (private->rdc_data.dev_type) {
318 case 0x3390:
319 dn = ceil_quot(reclen + 6, 232);
320 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
321 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
322 break;
323 case 0x3380:
324 d = 7 + ceil_quot(reclen + 12, 32);
325 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
326 break;
327 }
328 }
329 data->sector = sector;
330 /* note: meaning of count depends on the operation
331 * for record based I/O it's the number of records, but for
332 * track based I/O it's the number of tracks
333 */
334 data->count = count;
335 switch (cmd) {
336 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
337 data->operation.orientation = 0x3;
338 data->operation.operation = 0x03;
339 break;
340 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
341 data->operation.orientation = 0x3;
342 data->operation.operation = 0x16;
343 break;
344 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
345 data->operation.orientation = 0x1;
346 data->operation.operation = 0x03;
347 data->count++;
348 break;
349 case DASD_ECKD_CCW_READ_RECORD_ZERO:
350 data->operation.orientation = 0x3;
351 data->operation.operation = 0x16;
352 data->count++;
353 break;
354 case DASD_ECKD_CCW_WRITE:
355 case DASD_ECKD_CCW_WRITE_MT:
356 case DASD_ECKD_CCW_WRITE_KD:
357 case DASD_ECKD_CCW_WRITE_KD_MT:
358 data->auxiliary.length_valid = 0x1;
359 data->length = reclen;
360 data->operation.operation = 0x01;
361 break;
362 case DASD_ECKD_CCW_WRITE_CKD:
363 case DASD_ECKD_CCW_WRITE_CKD_MT:
364 data->auxiliary.length_valid = 0x1;
365 data->length = reclen;
366 data->operation.operation = 0x03;
367 break;
368 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
369 data->auxiliary.length_valid = 0x1;
370 data->length = reclen; /* not tlf, as one might think */
371 data->operation.operation = 0x3F;
372 data->extended_operation = 0x23;
373 break;
374 case DASD_ECKD_CCW_READ:
375 case DASD_ECKD_CCW_READ_MT:
376 case DASD_ECKD_CCW_READ_KD:
377 case DASD_ECKD_CCW_READ_KD_MT:
378 data->auxiliary.length_valid = 0x1;
379 data->length = reclen;
380 data->operation.operation = 0x06;
381 break;
382 case DASD_ECKD_CCW_READ_CKD:
383 case DASD_ECKD_CCW_READ_CKD_MT:
384 data->auxiliary.length_valid = 0x1;
385 data->length = reclen;
386 data->operation.operation = 0x16;
387 break;
388 case DASD_ECKD_CCW_READ_COUNT:
389 data->operation.operation = 0x06;
390 break;
391 case DASD_ECKD_CCW_READ_TRACK_DATA:
392 data->auxiliary.length_valid = 0x1;
393 data->length = tlf;
394 data->operation.operation = 0x0C;
395 break;
396 case DASD_ECKD_CCW_ERASE:
397 data->length = reclen;
398 data->auxiliary.length_valid = 0x1;
399 data->operation.operation = 0x0b;
400 break;
401 default:
402 DBF_DEV_EVENT(DBF_ERR, device,
403 "fill LRE unknown opcode 0x%x", cmd);
404 BUG();
405 }
406 set_ch_t(&data->seek_addr,
407 trk / private->rdc_data.trk_per_cyl,
408 trk % private->rdc_data.trk_per_cyl);
409 data->search_arg.cyl = data->seek_addr.cyl;
410 data->search_arg.head = data->seek_addr.head;
411 data->search_arg.record = rec_on_trk;
412}
413
414static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
415 unsigned int trk, unsigned int totrk, int cmd,
416 struct dasd_device *basedev, struct dasd_device *startdev,
417 unsigned char format, unsigned int rec_on_trk, int count,
418 unsigned int blksize, unsigned int tlf)
8e09f215
SW		 419{
420 struct dasd_eckd_private *basepriv, *startpriv;
f3eb5384
SW		 421 struct DE_eckd_data *dedata;
422 struct LRE_eckd_data *lredata;
b44b0ab3
SW		 423 u32 begcyl, endcyl;
424 u16 heads, beghead, endhead;
8e09f215
SW		 425 int rc = 0;
426
427 basepriv = (struct dasd_eckd_private *) basedev->private;
428 startpriv = (struct dasd_eckd_private *) startdev->private;
f3eb5384
SW		 429 dedata = &pfxdata->define_extent;
430 lredata = &pfxdata->locate_record;
8e09f215
SW		 431
432 ccw->cmd_code = DASD_ECKD_CCW_PFX;
433 ccw->flags = 0;
434 ccw->count = sizeof(*pfxdata);
435 ccw->cda = (__u32) __pa(pfxdata);
436
437 memset(pfxdata, 0, sizeof(*pfxdata));
438 /* prefix data */
f3eb5384
SW		 439 if (format > 1) {
440 DBF_DEV_EVENT(DBF_ERR, basedev,
441 "PFX LRE unknown format 0x%x", format);
442 BUG();
443 return -EINVAL;
444 }
445 pfxdata->format = format;
4abb08c2
SW		 446 pfxdata->base_address = basepriv->ned->unit_addr;
447 pfxdata->base_lss = basepriv->ned->ID;
f3eb5384 448 pfxdata->validity.define_extent = 1;
8e09f215
SW		 449
450 /* private uid is kept up to date, conf_data may be outdated */
451 if (startpriv->uid.type != UA_BASE_DEVICE) {
452 pfxdata->validity.verify_base = 1;
453 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS)
454 pfxdata->validity.hyper_pav = 1;
455 }
456
457 /* define extend data (mostly)*/
458 switch (cmd) {
459 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
460 case DASD_ECKD_CCW_READ_RECORD_ZERO:
461 case DASD_ECKD_CCW_READ:
462 case DASD_ECKD_CCW_READ_MT:
463 case DASD_ECKD_CCW_READ_CKD:
464 case DASD_ECKD_CCW_READ_CKD_MT:
465 case DASD_ECKD_CCW_READ_KD:
466 case DASD_ECKD_CCW_READ_KD_MT:
467 case DASD_ECKD_CCW_READ_COUNT:
f3eb5384
SW		 468 dedata->mask.perm = 0x1;
469 dedata->attributes.operation = basepriv->attrib.operation;
470 break;
471 case DASD_ECKD_CCW_READ_TRACK_DATA:
472 dedata->mask.perm = 0x1;
473 dedata->attributes.operation = basepriv->attrib.operation;
474 dedata->blk_size = 0;
8e09f215
SW		 475 break;
476 case DASD_ECKD_CCW_WRITE:
477 case DASD_ECKD_CCW_WRITE_MT:
478 case DASD_ECKD_CCW_WRITE_KD:
479 case DASD_ECKD_CCW_WRITE_KD_MT:
f3eb5384
SW		 480 dedata->mask.perm = 0x02;
481 dedata->attributes.operation = basepriv->attrib.operation;
8e09f215
SW		 482 rc = check_XRC_on_prefix(pfxdata, basedev);
483 break;
484 case DASD_ECKD_CCW_WRITE_CKD:
485 case DASD_ECKD_CCW_WRITE_CKD_MT:
f3eb5384 486 dedata->attributes.operation = DASD_BYPASS_CACHE;
8e09f215
SW		 487 rc = check_XRC_on_prefix(pfxdata, basedev);
488 break;
489 case DASD_ECKD_CCW_ERASE:
490 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
491 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
f3eb5384
SW		 492 dedata->mask.perm = 0x3;
493 dedata->mask.auth = 0x1;
494 dedata->attributes.operation = DASD_BYPASS_CACHE;
8e09f215
SW		 495 rc = check_XRC_on_prefix(pfxdata, basedev);
496 break;
f3eb5384
SW		 497 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
498 dedata->mask.perm = 0x02;
499 dedata->attributes.operation = basepriv->attrib.operation;
500 dedata->blk_size = blksize;
501 rc = check_XRC_on_prefix(pfxdata, basedev);
8e09f215 502 break;
f3eb5384
SW		 503 default:
504 DBF_DEV_EVENT(DBF_ERR, basedev,
505 "PFX LRE unknown opcode 0x%x", cmd);
506 BUG();
507 return -EINVAL;
8e09f215
SW		 508 }
509
f3eb5384 510 dedata->attributes.mode = 0x3; /* ECKD */
8e09f215
SW		 511
512 if ((basepriv->rdc_data.cu_type == 0x2105 ||
513 basepriv->rdc_data.cu_type == 0x2107 ||
514 basepriv->rdc_data.cu_type == 0x1750)
515 && !(basepriv->uses_cdl && trk < 2))
f3eb5384 516 dedata->ga_extended |= 0x40; /* Regular Data Format Mode */
8e09f215 517
b44b0ab3
SW		 518 heads = basepriv->rdc_data.trk_per_cyl;
519 begcyl = trk / heads;
520 beghead = trk % heads;
521 endcyl = totrk / heads;
522 endhead = totrk % heads;
8e09f215
SW		 523
524 /* check for sequential prestage - enhance cylinder range */
f3eb5384
SW		 525 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE ||
526 dedata->attributes.operation == DASD_SEQ_ACCESS) {
8e09f215 527
b44b0ab3
SW		 528 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl)
529 endcyl += basepriv->attrib.nr_cyl;
8e09f215 530 else
b44b0ab3 531 endcyl = (basepriv->real_cyl - 1);
8e09f215
SW		 532 }
533
f3eb5384
SW		 534 set_ch_t(&dedata->beg_ext, begcyl, beghead);
535 set_ch_t(&dedata->end_ext, endcyl, endhead);
536
537 if (format == 1) {
538 fill_LRE_data(lredata, trk, rec_on_trk, count, cmd,
539 basedev, blksize, tlf);
540 }
541
8e09f215
SW		 542 return rc;
543}
544
f3eb5384
SW		 545static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
546 unsigned int trk, unsigned int totrk, int cmd,
547 struct dasd_device *basedev, struct dasd_device *startdev)
548{
549 return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev,
550 0, 0, 0, 0, 0);
551}
552
4d284cac 553static void
b44b0ab3
SW		 554locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk,
555 unsigned int rec_on_trk, int no_rec, int cmd,
1da177e4
LT		 556 struct dasd_device * device, int reclen)
557{
558 struct dasd_eckd_private *private;
559 int sector;
560 int dn, d;
138c014d 561
1da177e4
LT		 562 private = (struct dasd_eckd_private *) device->private;
563
564 DBF_DEV_EVENT(DBF_INFO, device,
565 "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d",
566 trk, rec_on_trk, no_rec, cmd, reclen);
567
568 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD;
569 ccw->flags = 0;
570 ccw->count = 16;
571 ccw->cda = (__u32) __pa(data);
572
8e09f215 573 memset(data, 0, sizeof(struct LO_eckd_data));
1da177e4
LT		 574 sector = 0;
575 if (rec_on_trk) {
576 switch (private->rdc_data.dev_type) {
577 case 0x3390:
578 dn = ceil_quot(reclen + 6, 232);
579 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
580 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
581 break;
582 case 0x3380:
583 d = 7 + ceil_quot(reclen + 12, 32);
584 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
585 break;
586 }
587 }
588 data->sector = sector;
589 data->count = no_rec;
590 switch (cmd) {
591 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
592 data->operation.orientation = 0x3;
593 data->operation.operation = 0x03;
594 break;
595 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
596 data->operation.orientation = 0x3;
597 data->operation.operation = 0x16;
598 break;
599 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
600 data->operation.orientation = 0x1;
601 data->operation.operation = 0x03;
602 data->count++;
603 break;
604 case DASD_ECKD_CCW_READ_RECORD_ZERO:
605 data->operation.orientation = 0x3;
606 data->operation.operation = 0x16;
607 data->count++;
608 break;
609 case DASD_ECKD_CCW_WRITE:
610 case DASD_ECKD_CCW_WRITE_MT:
611 case DASD_ECKD_CCW_WRITE_KD:
612 case DASD_ECKD_CCW_WRITE_KD_MT:
613 data->auxiliary.last_bytes_used = 0x1;
614 data->length = reclen;
615 data->operation.operation = 0x01;
616 break;
617 case DASD_ECKD_CCW_WRITE_CKD:
618 case DASD_ECKD_CCW_WRITE_CKD_MT:
619 data->auxiliary.last_bytes_used = 0x1;
620 data->length = reclen;
621 data->operation.operation = 0x03;
622 break;
623 case DASD_ECKD_CCW_READ:
624 case DASD_ECKD_CCW_READ_MT:
625 case DASD_ECKD_CCW_READ_KD:
626 case DASD_ECKD_CCW_READ_KD_MT:
627 data->auxiliary.last_bytes_used = 0x1;
628 data->length = reclen;
629 data->operation.operation = 0x06;
630 break;
631 case DASD_ECKD_CCW_READ_CKD:
632 case DASD_ECKD_CCW_READ_CKD_MT:
633 data->auxiliary.last_bytes_used = 0x1;
634 data->length = reclen;
635 data->operation.operation = 0x16;
636 break;
637 case DASD_ECKD_CCW_READ_COUNT:
638 data->operation.operation = 0x06;
639 break;
640 case DASD_ECKD_CCW_ERASE:
641 data->length = reclen;
642 data->auxiliary.last_bytes_used = 0x1;
643 data->operation.operation = 0x0b;
644 break;
645 default:
fc19f381
SH		 646 DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record "
647 "opcode 0x%x", cmd);
1da177e4 648 }
b44b0ab3
SW		 649 set_ch_t(&data->seek_addr,
650 trk / private->rdc_data.trk_per_cyl,
651 trk % private->rdc_data.trk_per_cyl);
652 data->search_arg.cyl = data->seek_addr.cyl;
653 data->search_arg.head = data->seek_addr.head;
1da177e4
LT		 654 data->search_arg.record = rec_on_trk;
655}
656
657/*
658 * Returns 1 if the block is one of the special blocks that needs
659 * to get read/written with the KD variant of the command.
660 * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and
661 * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT.
662 * Luckily the KD variants differ only by one bit (0x08) from the
663 * normal variant. So don't wonder about code like:
664 * if (dasd_eckd_cdl_special(blk_per_trk, recid))
665 * ccw->cmd_code |= 0x8;
666 */
667static inline int
668dasd_eckd_cdl_special(int blk_per_trk, int recid)
669{
670 if (recid < 3)
671 return 1;
672 if (recid < blk_per_trk)
673 return 0;
674 if (recid < 2 * blk_per_trk)
675 return 1;
676 return 0;
677}
678
679/*
680 * Returns the record size for the special blocks of the cdl format.
681 * Only returns something useful if dasd_eckd_cdl_special is true
682 * for the recid.
683 */
684static inline int
685dasd_eckd_cdl_reclen(int recid)
686{
687 if (recid < 3)
688 return sizes_trk0[recid];
689 return LABEL_SIZE;
690}
691
3d052595
HH		 692/*
693 * Generate device unique id that specifies the physical device.
694 */
2dedf0d9 695static int dasd_eckd_generate_uid(struct dasd_device *device)
3d052595
HH		 696{
697 struct dasd_eckd_private *private;
2dedf0d9 698 struct dasd_uid *uid;
4abb08c2 699 int count;
2dedf0d9 700 unsigned long flags;
3d052595
HH		 701
702 private = (struct dasd_eckd_private *) device->private;
703 if (!private)
704 return -ENODEV;
4abb08c2 705 if (!private->ned || !private->gneq)
3d052595 706 return -ENODEV;
2dedf0d9
SH		 707 uid = &private->uid;
708 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
3d052595 709 memset(uid, 0, sizeof(struct dasd_uid));
4abb08c2 710 memcpy(uid->vendor, private->ned->HDA_manufacturer,
d0710c7c 711 sizeof(uid->vendor) - 1);
3d052595 712 EBCASC(uid->vendor, sizeof(uid->vendor) - 1);
4abb08c2 713 memcpy(uid->serial, private->ned->HDA_location,
d0710c7c 714 sizeof(uid->serial) - 1);
3d052595 715 EBCASC(uid->serial, sizeof(uid->serial) - 1);
4abb08c2 716 uid->ssid = private->gneq->subsystemID;
a419aef8 717 uid->real_unit_addr = private->ned->unit_addr;
4abb08c2
SW		 718 if (private->sneq) {
719 uid->type = private->sneq->sua_flags;
8e09f215 720 if (uid->type == UA_BASE_PAV_ALIAS)
4abb08c2 721 uid->base_unit_addr = private->sneq->base_unit_addr;
8e09f215
SW		 722 } else {
723 uid->type = UA_BASE_DEVICE;
724 }
4abb08c2
SW		 725 if (private->vdsneq) {
726 for (count = 0; count < 16; count++) {
727 sprintf(uid->vduit+2*count, "%02x",
728 private->vdsneq->uit[count]);
729 }
730 }
2dedf0d9 731 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
3d052595
HH		 732 return 0;
733}
734
2dedf0d9
SH		 735static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid)
736{
737 struct dasd_eckd_private *private;
738 unsigned long flags;
739
740 if (device->private) {
741 private = (struct dasd_eckd_private *)device->private;
742 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
743 *uid = private->uid;
744 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
745 return 0;
746 }
747 return -EINVAL;
748}
749
763968e2
HC		 750static struct dasd_ccw_req *dasd_eckd_build_rcd_lpm(struct dasd_device *device,
751 void *rcd_buffer,
752 struct ciw *ciw, __u8 lpm)
17283b56
CH		 753{
754 struct dasd_ccw_req *cqr;
755 struct ccw1 *ccw;
756
68b781fe
SH		 757 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, ciw->count,
758 device);
17283b56
CH		 759
760 if (IS_ERR(cqr)) {
fc19f381
SH		 761 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
762 "Could not allocate RCD request");
17283b56
CH		 763 return cqr;
764 }
765
766 ccw = cqr->cpaddr;
767 ccw->cmd_code = ciw->cmd;
768 ccw->cda = (__u32)(addr_t)rcd_buffer;
769 ccw->count = ciw->count;
770
8e09f215
SW		 771 cqr->startdev = device;
772 cqr->memdev = device;
773 cqr->block = NULL;
17283b56
CH		 774 cqr->expires = 10*HZ;
775 cqr->lpm = lpm;
eb6e199b 776 cqr->retries = 256;
17283b56
CH		 777 cqr->buildclk = get_clock();
778 cqr->status = DASD_CQR_FILLED;
779 return cqr;
780}
781
782static int dasd_eckd_read_conf_lpm(struct dasd_device *device,
783 void **rcd_buffer,
784 int *rcd_buffer_size, __u8 lpm)
785{
786 struct ciw *ciw;
787 char *rcd_buf = NULL;
788 int ret;
789 struct dasd_ccw_req *cqr;
790
791 /*
792 * scan for RCD command in extended SenseID data
793 */
794 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
795 if (!ciw || ciw->cmd == 0) {
796 ret = -EOPNOTSUPP;
797 goto out_error;
798 }
799 rcd_buf = kzalloc(ciw->count, GFP_KERNEL | GFP_DMA);
800 if (!rcd_buf) {
801 ret = -ENOMEM;
802 goto out_error;
803 }
4abb08c2
SW		 804
805 /*
806 * buffer has to start with EBCDIC "V1.0" to show
807 * support for virtual device SNEQ
808 */
809 rcd_buf[0] = 0xE5;
810 rcd_buf[1] = 0xF1;
811 rcd_buf[2] = 0x4B;
812 rcd_buf[3] = 0xF0;
17283b56
CH		 813 cqr = dasd_eckd_build_rcd_lpm(device, rcd_buf, ciw, lpm);
814 if (IS_ERR(cqr)) {
815 ret = PTR_ERR(cqr);
816 goto out_error;
817 }
818 ret = dasd_sleep_on(cqr);
819 /*
820 * on success we update the user input parms
821 */
8e09f215 822 dasd_sfree_request(cqr, cqr->memdev);
17283b56
CH		 823 if (ret)
824 goto out_error;
825
826 *rcd_buffer_size = ciw->count;
827 *rcd_buffer = rcd_buf;
828 return 0;
829out_error:
830 kfree(rcd_buf);
831 *rcd_buffer = NULL;
832 *rcd_buffer_size = 0;
833 return ret;
834}
835
4abb08c2
SW		 836static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private)
837{
838
839 struct dasd_sneq *sneq;
840 int i, count;
841
842 private->ned = NULL;
843 private->sneq = NULL;
844 private->vdsneq = NULL;
845 private->gneq = NULL;
846 count = private->conf_len / sizeof(struct dasd_sneq);
847 sneq = (struct dasd_sneq *)private->conf_data;
848 for (i = 0; i < count; ++i) {
849 if (sneq->flags.identifier == 1 && sneq->format == 1)
850 private->sneq = sneq;
851 else if (sneq->flags.identifier == 1 && sneq->format == 4)
852 private->vdsneq = (struct vd_sneq *)sneq;
853 else if (sneq->flags.identifier == 2)
854 private->gneq = (struct dasd_gneq *)sneq;
855 else if (sneq->flags.identifier == 3 && sneq->res1 == 1)
856 private->ned = (struct dasd_ned *)sneq;
857 sneq++;
858 }
859 if (!private->ned || !private->gneq) {
860 private->ned = NULL;
861 private->sneq = NULL;
862 private->vdsneq = NULL;
863 private->gneq = NULL;
864 return -EINVAL;
865 }
866 return 0;
867
868};
869
870static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len)
871{
872 struct dasd_gneq *gneq;
873 int i, count, found;
874
875 count = conf_len / sizeof(*gneq);
876 gneq = (struct dasd_gneq *)conf_data;
877 found = 0;
878 for (i = 0; i < count; ++i) {
879 if (gneq->flags.identifier == 2) {
880 found = 1;
881 break;
882 }
883 gneq++;
884 }
885 if (found)
886 return ((char *)gneq)[18] & 0x07;
887 else
888 return 0;
889}
890
891static int dasd_eckd_read_conf(struct dasd_device *device)
1da177e4
LT		 892{
893 void *conf_data;
894 int conf_len, conf_data_saved;
895 int rc;
896 __u8 lpm;
897 struct dasd_eckd_private *private;
898 struct dasd_eckd_path *path_data;
899
900 private = (struct dasd_eckd_private *) device->private;
901 path_data = (struct dasd_eckd_path *) &private->path_data;
902 path_data->opm = ccw_device_get_path_mask(device->cdev);
903 lpm = 0x80;
904 conf_data_saved = 0;
1da177e4
LT		 905 /* get configuration data per operational path */
906 for (lpm = 0x80; lpm; lpm>>= 1) {
907 if (lpm & path_data->opm){
17283b56
CH		 908 rc = dasd_eckd_read_conf_lpm(device, &conf_data,
909 &conf_len, lpm);
1da177e4 910 if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */
b8ed5dd5 911 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
fc19f381 912 "Read configuration data returned "
b8ed5dd5 913 "error %d", rc);
1da177e4
LT		 914 return rc;
915 }
916 if (conf_data == NULL) {
b8ed5dd5
SH		 917 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
918 "No configuration data "
919 "retrieved");
d133a960 920 continue; /* no error */
1da177e4 921 }
1da177e4 922 /* save first valid configuration data */
4abb08c2
SW		 923 if (!conf_data_saved) {
924 kfree(private->conf_data);
925 private->conf_data = conf_data;
926 private->conf_len = conf_len;
927 if (dasd_eckd_identify_conf_parts(private)) {
928 private->conf_data = NULL;
929 private->conf_len = 0;
930 kfree(conf_data);
931 continue;
932 }
1da177e4
LT		 933 conf_data_saved++;
934 }
4abb08c2 935 switch (dasd_eckd_path_access(conf_data, conf_len)) {
1da177e4
LT		 936 case 0x02:
937 path_data->npm |= lpm;
938 break;
939 case 0x03:
940 path_data->ppm |= lpm;
941 break;
942 }
4abb08c2
SW		 943 if (conf_data != private->conf_data)
944 kfree(conf_data);
1da177e4
LT		 945 }
946 }
947 return 0;
948}
949
8e09f215
SW		 950static int dasd_eckd_read_features(struct dasd_device *device)
951{
952 struct dasd_psf_prssd_data *prssdp;
953 struct dasd_rssd_features *features;
954 struct dasd_ccw_req *cqr;
955 struct ccw1 *ccw;
956 int rc;
957 struct dasd_eckd_private *private;
958
959 private = (struct dasd_eckd_private *) device->private;
68d1e5f0 960 memset(&private->features, 0, sizeof(struct dasd_rssd_features));
68b781fe 961 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
8e09f215
SW		 962 (sizeof(struct dasd_psf_prssd_data) +
963 sizeof(struct dasd_rssd_features)),
964 device);
965 if (IS_ERR(cqr)) {
b8ed5dd5
SH		 966 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not "
967 "allocate initialization request");
8e09f215
SW		 968 return PTR_ERR(cqr);
969 }
970 cqr->startdev = device;
971 cqr->memdev = device;
972 cqr->block = NULL;
eb6e199b 973 cqr->retries = 256;
8e09f215
SW		 974 cqr->expires = 10 * HZ;
975
976 /* Prepare for Read Subsystem Data */
977 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
978 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
979 prssdp->order = PSF_ORDER_PRSSD;
980 prssdp->suborder = 0x41; /* Read Feature Codes */
981 /* all other bytes of prssdp must be zero */
982
983 ccw = cqr->cpaddr;
984 ccw->cmd_code = DASD_ECKD_CCW_PSF;
985 ccw->count = sizeof(struct dasd_psf_prssd_data);
986 ccw->flags |= CCW_FLAG_CC;
987 ccw->cda = (__u32)(addr_t) prssdp;
988
989 /* Read Subsystem Data - feature codes */
990 features = (struct dasd_rssd_features *) (prssdp + 1);
991 memset(features, 0, sizeof(struct dasd_rssd_features));
992
993 ccw++;
994 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
995 ccw->count = sizeof(struct dasd_rssd_features);
996 ccw->cda = (__u32)(addr_t) features;
997
998 cqr->buildclk = get_clock();
999 cqr->status = DASD_CQR_FILLED;
1000 rc = dasd_sleep_on(cqr);
1001 if (rc == 0) {
1002 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
1003 features = (struct dasd_rssd_features *) (prssdp + 1);
1004 memcpy(&private->features, features,
1005 sizeof(struct dasd_rssd_features));
68d1e5f0
SW		 1006 } else
1007 dev_warn(&device->cdev->dev, "Reading device feature codes"
1008 " failed with rc=%d\n", rc);
8e09f215
SW		 1009 dasd_sfree_request(cqr, cqr->memdev);
1010 return rc;
1011}
1012
1013
40545573
HH		 1014/*
1015 * Build CP for Perform Subsystem Function - SSC.
1016 */
f3eb5384
SW		 1017static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device,
1018 int enable_pav)
40545573 1019{
8e09f215
SW		 1020 struct dasd_ccw_req *cqr;
1021 struct dasd_psf_ssc_data *psf_ssc_data;
1022 struct ccw1 *ccw;
40545573 1023
68b781fe 1024 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ ,
40545573
HH		 1025 sizeof(struct dasd_psf_ssc_data),
1026 device);
1027
8e09f215 1028 if (IS_ERR(cqr)) {
fc19f381 1029 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
40545573 1030 "Could not allocate PSF-SSC request");
8e09f215
SW		 1031 return cqr;
1032 }
1033 psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data;
1034 psf_ssc_data->order = PSF_ORDER_SSC;
626350b6 1035 psf_ssc_data->suborder = 0xc0;
f3eb5384 1036 if (enable_pav) {
626350b6 1037 psf_ssc_data->suborder |= 0x08;
f3eb5384
SW		 1038 psf_ssc_data->reserved[0] = 0x88;
1039 }
8e09f215
SW		 1040 ccw = cqr->cpaddr;
1041 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1042 ccw->cda = (__u32)(addr_t)psf_ssc_data;
1043 ccw->count = 66;
1044
1045 cqr->startdev = device;
1046 cqr->memdev = device;
1047 cqr->block = NULL;
eb6e199b 1048 cqr->retries = 256;
8e09f215
SW		 1049 cqr->expires = 10*HZ;
1050 cqr->buildclk = get_clock();
1051 cqr->status = DASD_CQR_FILLED;
1052 return cqr;
40545573
HH		 1053}
1054
1055/*
1056 * Perform Subsystem Function.
1057 * It is necessary to trigger CIO for channel revalidation since this
1058 * call might change behaviour of DASD devices.
1059 */
1060static int
f3eb5384 1061dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav)
40545573 1062{
8e09f215
SW		 1063 struct dasd_ccw_req *cqr;
1064 int rc;
1065
f3eb5384 1066 cqr = dasd_eckd_build_psf_ssc(device, enable_pav);
8e09f215
SW		 1067 if (IS_ERR(cqr))
1068 return PTR_ERR(cqr);
1069
1070 rc = dasd_sleep_on(cqr);
1071 if (!rc)
1072 /* trigger CIO to reprobe devices */
1073 css_schedule_reprobe();
1074 dasd_sfree_request(cqr, cqr->memdev);
1075 return rc;
40545573
HH		 1076}
1077
1078/*
1079 * Valide storage server of current device.
1080 */
f4ac1d02 1081static void dasd_eckd_validate_server(struct dasd_device *device)
40545573
HH		 1082{
1083 int rc;
8e09f215 1084 struct dasd_eckd_private *private;
f3eb5384 1085 int enable_pav;
40545573 1086
40545573 1087 if (dasd_nopav || MACHINE_IS_VM)
f3eb5384
SW		 1088 enable_pav = 0;
1089 else
1090 enable_pav = 1;
1091 rc = dasd_eckd_psf_ssc(device, enable_pav);
eb6e199b 1092
8e79a441
HH		 1093 /* may be requested feature is not available on server,
1094 * therefore just report error and go ahead */
8e09f215 1095 private = (struct dasd_eckd_private *) device->private;
b8ed5dd5
SH		 1096 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x "
1097 "returned rc=%d", private->uid.ssid, rc);
40545573
HH		 1098}
1099
3d052595
HH		 1100/*
1101 * Check device characteristics.
1102 * If the device is accessible using ECKD discipline, the device is enabled.
1103 */
1da177e4
LT		 1104static int
1105dasd_eckd_check_characteristics(struct dasd_device *device)
1106{
1107 struct dasd_eckd_private *private;
8e09f215 1108 struct dasd_block *block;
2dedf0d9 1109 struct dasd_uid temp_uid;
8e09f215 1110 int is_known, rc;
33b62a30 1111 int readonly;
1da177e4 1112
454e1fa1
PO		 1113 if (!ccw_device_is_pathgroup(device->cdev)) {
1114 dev_warn(&device->cdev->dev,
1115 "A channel path group could not be established\n");
1116 return -EIO;
1117 }
1118 if (!ccw_device_is_multipath(device->cdev)) {
1119 dev_info(&device->cdev->dev,
1120 "The DASD is not operating in multipath mode\n");
1121 }
1da177e4 1122 private = (struct dasd_eckd_private *) device->private;
92636b15
SO		 1123 if (!private) {
1124 private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA);
1125 if (!private) {
fc19f381
SH		 1126 dev_warn(&device->cdev->dev,
1127 "Allocating memory for private DASD data "
1128 "failed\n");
1da177e4
LT		 1129 return -ENOMEM;
1130 }
1da177e4 1131 device->private = (void *) private;
92636b15
SO		 1132 } else {
1133 memset(private, 0, sizeof(*private));
1da177e4
LT		 1134 }
1135 /* Invalidate status of initial analysis. */
1136 private->init_cqr_status = -1;
1137 /* Set default cache operations. */
1138 private->attrib.operation = DASD_NORMAL_CACHE;
1139 private->attrib.nr_cyl = 0;
1140
40545573
HH		 1141 /* Read Configuration Data */
1142 rc = dasd_eckd_read_conf(device);
1143 if (rc)
8e09f215 1144 goto out_err1;
40545573 1145
2dedf0d9
SH		 1146 /* Generate device unique id */
1147 rc = dasd_eckd_generate_uid(device);
40545573 1148 if (rc)
8e09f215 1149 goto out_err1;
8e09f215 1150
2dedf0d9
SH		 1151 dasd_eckd_get_uid(device, &temp_uid);
1152 if (temp_uid.type == UA_BASE_DEVICE) {
8e09f215
SW		 1153 block = dasd_alloc_block();
1154 if (IS_ERR(block)) {
b8ed5dd5
SH		 1155 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1156 "could not allocate dasd "
1157 "block structure");
8e09f215
SW		 1158 rc = PTR_ERR(block);
1159 goto out_err1;
1160 }
1161 device->block = block;
1162 block->base = device;
1163 }
1164
1165 /* register lcu with alias handling, enable PAV if this is a new lcu */
1166 is_known = dasd_alias_make_device_known_to_lcu(device);
1167 if (is_known < 0) {
1168 rc = is_known;
1169 goto out_err2;
1170 }
f4ac1d02
SW		 1171 /*
1172 * dasd_eckd_vaildate_server is done on the first device that
1173 * is found for an LCU. All later other devices have to wait
1174 * for it, so they will read the correct feature codes.
1175 */
8e09f215 1176 if (!is_known) {
f4ac1d02
SW		 1177 dasd_eckd_validate_server(device);
1178 dasd_alias_lcu_setup_complete(device);
1179 } else
1180 dasd_alias_wait_for_lcu_setup(device);
1181
1182 /* device may report different configuration data after LCU setup */
1183 rc = dasd_eckd_read_conf(device);
1184 if (rc)
1185 goto out_err3;
8e09f215
SW		 1186
1187 /* Read Feature Codes */
68d1e5f0 1188 dasd_eckd_read_features(device);
40545573 1189
1da177e4 1190 /* Read Device Characteristics */
68b781fe
SH		 1191 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
1192 &private->rdc_data, 64);
8e09f215 1193 if (rc) {
b8ed5dd5
SH		 1194 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1195 "Read device characteristic failed, rc=%d", rc);
8e09f215
SW		 1196 goto out_err3;
1197 }
b44b0ab3
SW		 1198 /* find the vaild cylinder size */
1199 if (private->rdc_data.no_cyl == LV_COMPAT_CYL &&
1200 private->rdc_data.long_no_cyl)
1201 private->real_cyl = private->rdc_data.long_no_cyl;
1202 else
1203 private->real_cyl = private->rdc_data.no_cyl;
1204
33b62a30
SW		 1205 readonly = dasd_device_is_ro(device);
1206 if (readonly)
1207 set_bit(DASD_FLAG_DEVICE_RO, &device->flags);
1208
fc19f381 1209 dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) "
33b62a30 1210 "with %d cylinders, %d heads, %d sectors%s\n",
fc19f381
SH		 1211 private->rdc_data.dev_type,
1212 private->rdc_data.dev_model,
1213 private->rdc_data.cu_type,
1214 private->rdc_data.cu_model.model,
92636b15 1215 private->real_cyl,
fc19f381 1216 private->rdc_data.trk_per_cyl,
33b62a30
SW		 1217 private->rdc_data.sec_per_trk,
1218 readonly ? ", read-only device" : "");
8e09f215
SW		 1219 return 0;
1220
1221out_err3:
1222 dasd_alias_disconnect_device_from_lcu(device);
1223out_err2:
1224 dasd_free_block(device->block);
1225 device->block = NULL;
1226out_err1:
4abb08c2 1227 kfree(private->conf_data);
8e09f215
SW		 1228 kfree(device->private);
1229 device->private = NULL;
3d052595 1230 return rc;
1da177e4
LT		 1231}
1232
8e09f215
SW		 1233static void dasd_eckd_uncheck_device(struct dasd_device *device)
1234{
4abb08c2
SW		 1235 struct dasd_eckd_private *private;
1236
1237 private = (struct dasd_eckd_private *) device->private;
8e09f215 1238 dasd_alias_disconnect_device_from_lcu(device);
4abb08c2
SW		 1239 private->ned = NULL;
1240 private->sneq = NULL;
1241 private->vdsneq = NULL;
1242 private->gneq = NULL;
1243 private->conf_len = 0;
1244 kfree(private->conf_data);
1245 private->conf_data = NULL;
8e09f215
SW		 1246}
1247
1da177e4
LT		 1248static struct dasd_ccw_req *
1249dasd_eckd_analysis_ccw(struct dasd_device *device)
1250{
1251 struct dasd_eckd_private *private;
1252 struct eckd_count *count_data;
1253 struct LO_eckd_data *LO_data;
1254 struct dasd_ccw_req *cqr;
1255 struct ccw1 *ccw;
1256 int cplength, datasize;
1257 int i;
1258
1259 private = (struct dasd_eckd_private *) device->private;
1260
1261 cplength = 8;
1262 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data);
68b781fe 1263 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device);
1da177e4
LT		 1264 if (IS_ERR(cqr))
1265 return cqr;
1266 ccw = cqr->cpaddr;
1267 /* Define extent for the first 3 tracks. */
1268 define_extent(ccw++, cqr->data, 0, 2,
1269 DASD_ECKD_CCW_READ_COUNT, device);
8e09f215 1270 LO_data = cqr->data + sizeof(struct DE_eckd_data);
1da177e4
LT		 1271 /* Locate record for the first 4 records on track 0. */
1272 ccw[-1].flags |= CCW_FLAG_CC;
1273 locate_record(ccw++, LO_data++, 0, 0, 4,
1274 DASD_ECKD_CCW_READ_COUNT, device, 0);
1275
1276 count_data = private->count_area;
1277 for (i = 0; i < 4; i++) {
1278 ccw[-1].flags |= CCW_FLAG_CC;
1279 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1280 ccw->flags = 0;
1281 ccw->count = 8;
1282 ccw->cda = (__u32)(addr_t) count_data;
1283 ccw++;
1284 count_data++;
1285 }
1286
1287 /* Locate record for the first record on track 2. */
1288 ccw[-1].flags |= CCW_FLAG_CC;
1289 locate_record(ccw++, LO_data++, 2, 0, 1,
1290 DASD_ECKD_CCW_READ_COUNT, device, 0);
1291 /* Read count ccw. */
1292 ccw[-1].flags |= CCW_FLAG_CC;
1293 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1294 ccw->flags = 0;
1295 ccw->count = 8;
1296 ccw->cda = (__u32)(addr_t) count_data;
1297
8e09f215
SW		 1298 cqr->block = NULL;
1299 cqr->startdev = device;
1300 cqr->memdev = device;
eb6e199b 1301 cqr->retries = 255;
1da177e4
LT		 1302 cqr->buildclk = get_clock();
1303 cqr->status = DASD_CQR_FILLED;
1304 return cqr;
1305}
1306
eb6e199b
SW		 1307/* differentiate between 'no record found' and any other error */
1308static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr)
1309{
1310 char *sense;
1311 if (init_cqr->status == DASD_CQR_DONE)
1312 return INIT_CQR_OK;
1313 else if (init_cqr->status == DASD_CQR_NEED_ERP ||
1314 init_cqr->status == DASD_CQR_FAILED) {
1315 sense = dasd_get_sense(&init_cqr->irb);
1316 if (sense && (sense[1] & SNS1_NO_REC_FOUND))
1317 return INIT_CQR_UNFORMATTED;
1318 else
1319 return INIT_CQR_ERROR;
1320 } else
1321 return INIT_CQR_ERROR;
1322}
1323
1da177e4
LT		 1324/*
1325 * This is the callback function for the init_analysis cqr. It saves
1326 * the status of the initial analysis ccw before it frees it and kicks
1327 * the device to continue the startup sequence. This will call
1328 * dasd_eckd_do_analysis again (if the devices has not been marked
1329 * for deletion in the meantime).
1330 */
eb6e199b
SW		 1331static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr,
1332 void *data)
1da177e4
LT		 1333{
1334 struct dasd_eckd_private *private;
1335 struct dasd_device *device;
1336
8e09f215 1337 device = init_cqr->startdev;
1da177e4 1338 private = (struct dasd_eckd_private *) device->private;
eb6e199b 1339 private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr);
1da177e4
LT		 1340 dasd_sfree_request(init_cqr, device);
1341 dasd_kick_device(device);
1342}
1343
eb6e199b 1344static int dasd_eckd_start_analysis(struct dasd_block *block)
1da177e4
LT		 1345{
1346 struct dasd_eckd_private *private;
1347 struct dasd_ccw_req *init_cqr;
1348
8e09f215
SW		 1349 private = (struct dasd_eckd_private *) block->base->private;
1350 init_cqr = dasd_eckd_analysis_ccw(block->base);
1da177e4
LT		 1351 if (IS_ERR(init_cqr))
1352 return PTR_ERR(init_cqr);
1353 init_cqr->callback = dasd_eckd_analysis_callback;
1354 init_cqr->callback_data = NULL;
1355 init_cqr->expires = 5*HZ;
eb6e199b
SW		 1356 /* first try without ERP, so we can later handle unformatted
1357 * devices as special case
1358 */
1359 clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags);
1360 init_cqr->retries = 0;
1da177e4
LT		 1361 dasd_add_request_head(init_cqr);
1362 return -EAGAIN;
1363}
1364
eb6e199b 1365static int dasd_eckd_end_analysis(struct dasd_block *block)
1da177e4 1366{
8e09f215 1367 struct dasd_device *device;
1da177e4
LT		 1368 struct dasd_eckd_private *private;
1369 struct eckd_count *count_area;
1370 unsigned int sb, blk_per_trk;
1371 int status, i;
eb6e199b 1372 struct dasd_ccw_req *init_cqr;
1da177e4 1373
8e09f215 1374 device = block->base;
1da177e4
LT		 1375 private = (struct dasd_eckd_private *) device->private;
1376 status = private->init_cqr_status;
1377 private->init_cqr_status = -1;
eb6e199b
SW		 1378 if (status == INIT_CQR_ERROR) {
1379 /* try again, this time with full ERP */
1380 init_cqr = dasd_eckd_analysis_ccw(device);
1381 dasd_sleep_on(init_cqr);
1382 status = dasd_eckd_analysis_evaluation(init_cqr);
1383 dasd_sfree_request(init_cqr, device);
1384 }
1385
1386 if (status == INIT_CQR_UNFORMATTED) {
1387 dev_warn(&device->cdev->dev, "The DASD is not formatted\n");
1da177e4 1388 return -EMEDIUMTYPE;
eb6e199b
SW		 1389 } else if (status == INIT_CQR_ERROR) {
1390 dev_err(&device->cdev->dev,
1391 "Detecting the DASD disk layout failed because "
1392 "of an I/O error\n");
1393 return -EIO;
1da177e4
LT		 1394 }
1395
1396 private->uses_cdl = 1;
1da177e4
LT		 1397 /* Check Track 0 for Compatible Disk Layout */
1398 count_area = NULL;
1399 for (i = 0; i < 3; i++) {
1400 if (private->count_area[i].kl != 4 ||
1401 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) {
1402 private->uses_cdl = 0;
1403 break;
1404 }
1405 }
1406 if (i == 3)
1407 count_area = &private->count_area[4];
1408
1409 if (private->uses_cdl == 0) {
1410 for (i = 0; i < 5; i++) {
1411 if ((private->count_area[i].kl != 0) ||
1412 (private->count_area[i].dl !=
1413 private->count_area[0].dl))
1414 break;
1415 }
1416 if (i == 5)
1417 count_area = &private->count_area[0];
1418 } else {
1419 if (private->count_area[3].record == 1)
fc19f381
SH		 1420 dev_warn(&device->cdev->dev,
1421 "Track 0 has no records following the VTOC\n");
1da177e4
LT		 1422 }
1423 if (count_area != NULL && count_area->kl == 0) {
1424 /* we found notthing violating our disk layout */
1425 if (dasd_check_blocksize(count_area->dl) == 0)
8e09f215 1426 block->bp_block = count_area->dl;
1da177e4 1427 }
8e09f215 1428 if (block->bp_block == 0) {
fc19f381
SH		 1429 dev_warn(&device->cdev->dev,
1430 "The disk layout of the DASD is not supported\n");
1da177e4
LT		 1431 return -EMEDIUMTYPE;
1432 }
8e09f215
SW		 1433 block->s2b_shift = 0; /* bits to shift 512 to get a block */
1434 for (sb = 512; sb < block->bp_block; sb = sb << 1)
1435 block->s2b_shift++;
1da177e4 1436
8e09f215 1437 blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block);
b44b0ab3 1438 block->blocks = (private->real_cyl *
1da177e4
LT		 1439 private->rdc_data.trk_per_cyl *
1440 blk_per_trk);
1441
fc19f381
SH		 1442 dev_info(&device->cdev->dev,
1443 "DASD with %d KB/block, %d KB total size, %d KB/track, "
1444 "%s\n", (block->bp_block >> 10),
1445 ((private->real_cyl *
1446 private->rdc_data.trk_per_cyl *
1447 blk_per_trk * (block->bp_block >> 9)) >> 1),
1448 ((blk_per_trk * block->bp_block) >> 10),
1449 private->uses_cdl ?
1450 "compatible disk layout" : "linux disk layout");
1da177e4
LT		 1451
1452 return 0;
1453}
1454
8e09f215 1455static int dasd_eckd_do_analysis(struct dasd_block *block)
1da177e4
LT		 1456{
1457 struct dasd_eckd_private *private;
1458
8e09f215 1459 private = (struct dasd_eckd_private *) block->base->private;
1da177e4 1460 if (private->init_cqr_status < 0)
8e09f215 1461 return dasd_eckd_start_analysis(block);
1da177e4 1462 else
8e09f215 1463 return dasd_eckd_end_analysis(block);
1da177e4
LT		 1464}
1465
8e09f215
SW		 1466static int dasd_eckd_ready_to_online(struct dasd_device *device)
1467{
1468 return dasd_alias_add_device(device);
1469};
1470
1471static int dasd_eckd_online_to_ready(struct dasd_device *device)
1472{
501183f2 1473 cancel_work_sync(&device->reload_device);
8e09f215
SW		 1474 return dasd_alias_remove_device(device);
1475};
1476
1da177e4 1477static int
8e09f215 1478dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo)
1da177e4
LT		 1479{
1480 struct dasd_eckd_private *private;
1481
8e09f215
SW		 1482 private = (struct dasd_eckd_private *) block->base->private;
1483 if (dasd_check_blocksize(block->bp_block) == 0) {
1da177e4 1484 geo->sectors = recs_per_track(&private->rdc_data,
8e09f215 1485 0, block->bp_block);
1da177e4
LT		 1486 }
1487 geo->cylinders = private->rdc_data.no_cyl;
1488 geo->heads = private->rdc_data.trk_per_cyl;
1489 return 0;
1490}
1491
1492static struct dasd_ccw_req *
1493dasd_eckd_format_device(struct dasd_device * device,
1494 struct format_data_t * fdata)
1495{
1496 struct dasd_eckd_private *private;
1497 struct dasd_ccw_req *fcp;
1498 struct eckd_count *ect;
1499 struct ccw1 *ccw;
1500 void *data;
b44b0ab3
SW		 1501 int rpt;
1502 struct ch_t address;
1da177e4
LT		 1503 int cplength, datasize;
1504 int i;
f9a28f7b
JBJ		 1505 int intensity = 0;
1506 int r0_perm;
1da177e4
LT		 1507
1508 private = (struct dasd_eckd_private *) device->private;
1509 rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize);
b44b0ab3
SW		 1510 set_ch_t(&address,
1511 fdata->start_unit / private->rdc_data.trk_per_cyl,
1512 fdata->start_unit % private->rdc_data.trk_per_cyl);
1da177e4
LT		 1513
1514 /* Sanity checks. */
1515 if (fdata->start_unit >=
b44b0ab3 1516 (private->real_cyl * private->rdc_data.trk_per_cyl)) {
fc19f381
SH		 1517 dev_warn(&device->cdev->dev, "Start track number %d used in "
1518 "formatting is too big\n", fdata->start_unit);
1da177e4
LT		 1519 return ERR_PTR(-EINVAL);
1520 }
1521 if (fdata->start_unit > fdata->stop_unit) {
fc19f381
SH		 1522 dev_warn(&device->cdev->dev, "Start track %d used in "
1523 "formatting exceeds end track\n", fdata->start_unit);
1da177e4
LT		 1524 return ERR_PTR(-EINVAL);
1525 }
1526 if (dasd_check_blocksize(fdata->blksize) != 0) {
fc19f381
SH		 1527 dev_warn(&device->cdev->dev,
1528 "The DASD cannot be formatted with block size %d\n",
1529 fdata->blksize);
1da177e4
LT		 1530 return ERR_PTR(-EINVAL);
1531 }
1532
1533 /*
1534 * fdata->intensity is a bit string that tells us what to do:
1535 * Bit 0: write record zero
1536 * Bit 1: write home address, currently not supported
1537 * Bit 2: invalidate tracks
1538 * Bit 3: use OS/390 compatible disk layout (cdl)
f9a28f7b 1539 * Bit 4: do not allow storage subsystem to modify record zero
1da177e4
LT		 1540 * Only some bit combinations do make sense.
1541 */
f9a28f7b
JBJ		 1542 if (fdata->intensity & 0x10) {
1543 r0_perm = 0;
1544 intensity = fdata->intensity & ~0x10;
1545 } else {
1546 r0_perm = 1;
1547 intensity = fdata->intensity;
1548 }
1549 switch (intensity) {
1da177e4
LT		 1550 case 0x00: /* Normal format */
1551 case 0x08: /* Normal format, use cdl. */
1552 cplength = 2 + rpt;
1553 datasize = sizeof(struct DE_eckd_data) +
1554 sizeof(struct LO_eckd_data) +
1555 rpt * sizeof(struct eckd_count);
1556 break;
1557 case 0x01: /* Write record zero and format track. */
1558 case 0x09: /* Write record zero and format track, use cdl. */
1559 cplength = 3 + rpt;
1560 datasize = sizeof(struct DE_eckd_data) +
1561 sizeof(struct LO_eckd_data) +
1562 sizeof(struct eckd_count) +
1563 rpt * sizeof(struct eckd_count);
1564 break;
1565 case 0x04: /* Invalidate track. */
1566 case 0x0c: /* Invalidate track, use cdl. */
1567 cplength = 3;
1568 datasize = sizeof(struct DE_eckd_data) +
1569 sizeof(struct LO_eckd_data) +
1570 sizeof(struct eckd_count);
1571 break;
1572 default:
fc19f381
SH		 1573 dev_warn(&device->cdev->dev, "An I/O control call used "
1574 "incorrect flags 0x%x\n", fdata->intensity);
1da177e4
LT		 1575 return ERR_PTR(-EINVAL);
1576 }
1577 /* Allocate the format ccw request. */
68b781fe 1578 fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device);
1da177e4
LT		 1579 if (IS_ERR(fcp))
1580 return fcp;
1581
1582 data = fcp->data;
1583 ccw = fcp->cpaddr;
1584
f9a28f7b 1585 switch (intensity & ~0x08) {
1da177e4
LT		 1586 case 0x00: /* Normal format. */
1587 define_extent(ccw++, (struct DE_eckd_data *) data,
1588 fdata->start_unit, fdata->start_unit,
1589 DASD_ECKD_CCW_WRITE_CKD, device);
f9a28f7b
JBJ		 1590 /* grant subsystem permission to format R0 */
1591 if (r0_perm)
1592 ((struct DE_eckd_data *)data)->ga_extended |= 0x04;
1da177e4
LT		 1593 data += sizeof(struct DE_eckd_data);
1594 ccw[-1].flags |= CCW_FLAG_CC;
1595 locate_record(ccw++, (struct LO_eckd_data *) data,
1596 fdata->start_unit, 0, rpt,
1597 DASD_ECKD_CCW_WRITE_CKD, device,
1598 fdata->blksize);
1599 data += sizeof(struct LO_eckd_data);
1600 break;
1601 case 0x01: /* Write record zero + format track. */
1602 define_extent(ccw++, (struct DE_eckd_data *) data,
1603 fdata->start_unit, fdata->start_unit,
1604 DASD_ECKD_CCW_WRITE_RECORD_ZERO,
1605 device);
1606 data += sizeof(struct DE_eckd_data);
1607 ccw[-1].flags |= CCW_FLAG_CC;
1608 locate_record(ccw++, (struct LO_eckd_data *) data,
1609 fdata->start_unit, 0, rpt + 1,
1610 DASD_ECKD_CCW_WRITE_RECORD_ZERO, device,
8e09f215 1611 device->block->bp_block);
1da177e4
LT		 1612 data += sizeof(struct LO_eckd_data);
1613 break;
1614 case 0x04: /* Invalidate track. */
1615 define_extent(ccw++, (struct DE_eckd_data *) data,
1616 fdata->start_unit, fdata->start_unit,
1617 DASD_ECKD_CCW_WRITE_CKD, device);
1618 data += sizeof(struct DE_eckd_data);
1619 ccw[-1].flags |= CCW_FLAG_CC;
1620 locate_record(ccw++, (struct LO_eckd_data *) data,
1621 fdata->start_unit, 0, 1,
1622 DASD_ECKD_CCW_WRITE_CKD, device, 8);
1623 data += sizeof(struct LO_eckd_data);
1624 break;
1625 }
f9a28f7b 1626 if (intensity & 0x01) { /* write record zero */
1da177e4
LT		 1627 ect = (struct eckd_count *) data;
1628 data += sizeof(struct eckd_count);
b44b0ab3
SW		 1629 ect->cyl = address.cyl;
1630 ect->head = address.head;
1da177e4
LT		 1631 ect->record = 0;
1632 ect->kl = 0;
1633 ect->dl = 8;
1634 ccw[-1].flags |= CCW_FLAG_CC;
1635 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO;
1636 ccw->flags = CCW_FLAG_SLI;
1637 ccw->count = 8;
1638 ccw->cda = (__u32)(addr_t) ect;
1639 ccw++;
1640 }
f9a28f7b 1641 if ((intensity & ~0x08) & 0x04) { /* erase track */
1da177e4
LT		 1642 ect = (struct eckd_count *) data;
1643 data += sizeof(struct eckd_count);
b44b0ab3
SW		 1644 ect->cyl = address.cyl;
1645 ect->head = address.head;
1da177e4
LT		 1646 ect->record = 1;
1647 ect->kl = 0;
1648 ect->dl = 0;
1649 ccw[-1].flags |= CCW_FLAG_CC;
1650 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
1651 ccw->flags = CCW_FLAG_SLI;
1652 ccw->count = 8;
1653 ccw->cda = (__u32)(addr_t) ect;
1654 } else { /* write remaining records */
1655 for (i = 0; i < rpt; i++) {
1656 ect = (struct eckd_count *) data;
1657 data += sizeof(struct eckd_count);
b44b0ab3
SW		 1658 ect->cyl = address.cyl;
1659 ect->head = address.head;
1da177e4
LT		 1660 ect->record = i + 1;
1661 ect->kl = 0;
1662 ect->dl = fdata->blksize;
1663 /* Check for special tracks 0-1 when formatting CDL */
f9a28f7b 1664 if ((intensity & 0x08) &&
1da177e4
LT		 1665 fdata->start_unit == 0) {
1666 if (i < 3) {
1667 ect->kl = 4;
1668 ect->dl = sizes_trk0[i] - 4;
138c014d 1669 }
1da177e4 1670 }
f9a28f7b 1671 if ((intensity & 0x08) &&
1da177e4
LT		 1672 fdata->start_unit == 1) {
1673 ect->kl = 44;
1674 ect->dl = LABEL_SIZE - 44;
1675 }
1676 ccw[-1].flags |= CCW_FLAG_CC;
1677 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
1678 ccw->flags = CCW_FLAG_SLI;
1679 ccw->count = 8;
1680 ccw->cda = (__u32)(addr_t) ect;
1681 ccw++;
1682 }
1683 }
8e09f215
SW		 1684 fcp->startdev = device;
1685 fcp->memdev = device;
eb6e199b 1686 fcp->retries = 256;
1da177e4
LT		 1687 fcp->buildclk = get_clock();
1688 fcp->status = DASD_CQR_FILLED;
1689 return fcp;
1690}
1691
8e09f215 1692static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr)
1da177e4 1693{
8e09f215
SW		 1694 cqr->status = DASD_CQR_FILLED;
1695 if (cqr->block && (cqr->startdev != cqr->block->base)) {
1696 dasd_eckd_reset_ccw_to_base_io(cqr);
1697 cqr->startdev = cqr->block->base;
1da177e4 1698 }
8e09f215 1699};
1da177e4
LT		 1700
1701static dasd_erp_fn_t
1702dasd_eckd_erp_action(struct dasd_ccw_req * cqr)
1703{
8e09f215 1704 struct dasd_device *device = (struct dasd_device *) cqr->startdev;
1da177e4
LT		 1705 struct ccw_device *cdev = device->cdev;
1706
1707 switch (cdev->id.cu_type) {
1708 case 0x3990:
1709 case 0x2105:
1710 case 0x2107:
1711 case 0x1750:
1712 return dasd_3990_erp_action;
1713 case 0x9343:
1714 case 0x3880:
1715 default:
1716 return dasd_default_erp_action;
1717 }
1718}
1719
1720static dasd_erp_fn_t
1721dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr)
1722{
1723 return dasd_default_erp_postaction;
1724}
1725
8e09f215
SW		 1726
1727static void dasd_eckd_handle_unsolicited_interrupt(struct dasd_device *device,
1728 struct irb *irb)
1729{
1730 char mask;
f3eb5384 1731 char *sense = NULL;
501183f2 1732 struct dasd_eckd_private *private;
8e09f215 1733
501183f2 1734 private = (struct dasd_eckd_private *) device->private;
8e09f215
SW		 1735 /* first of all check for state change pending interrupt */
1736 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP;
f3eb5384 1737 if ((scsw_dstat(&irb->scsw) & mask) == mask) {
501183f2
SH		 1738 /* for alias only and not in offline processing*/
1739 if (!device->block && private->lcu &&
1740 !test_bit(DASD_FLAG_OFFLINE, &device->flags)) {
1741 /*
1742 * the state change could be caused by an alias
1743 * reassignment remove device from alias handling
1744 * to prevent new requests from being scheduled on
1745 * the wrong alias device
1746 */
1747 dasd_alias_remove_device(device);
1748
1749 /* schedule worker to reload device */
1750 dasd_reload_device(device);
1751 }
1752
8e09f215
SW		 1753 dasd_generic_handle_state_change(device);
1754 return;
1755 }
1756
1757 /* summary unit check */
f3eb5384 1758 if ((scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) &&
23d805b6 1759 (irb->ecw[7] == 0x0D)) {
8e09f215
SW		 1760 dasd_alias_handle_summary_unit_check(device, irb);
1761 return;
1762 }
1763
f3eb5384 1764 sense = dasd_get_sense(irb);
f60c768c 1765 /* service information message SIM */
f3eb5384
SW		 1766 if (sense && !(sense[27] & DASD_SENSE_BIT_0) &&
1767 ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) {
1768 dasd_3990_erp_handle_sim(device, sense);
9d853caf 1769 dasd_schedule_device_bh(device);
f60c768c
SH		 1770 return;
1771 }
1772
f3eb5384
SW		 1773 if ((scsw_cc(&irb->scsw) == 1) &&
1774 (scsw_fctl(&irb->scsw) & SCSW_FCTL_START_FUNC) &&
1775 (scsw_actl(&irb->scsw) & SCSW_ACTL_START_PEND) &&
1776 (scsw_stctl(&irb->scsw) & SCSW_STCTL_STATUS_PEND)) {
ada3df91
SH		 1777 /* fake irb do nothing, they are handled elsewhere */
1778 dasd_schedule_device_bh(device);
1779 return;
1780 }
8e09f215 1781
f3eb5384 1782 if (!sense) {
ada3df91 1783 /* just report other unsolicited interrupts */
fc19f381 1784 DBF_DEV_EVENT(DBF_ERR, device, "%s",
ada3df91
SH		 1785 "unsolicited interrupt received");
1786 } else {
fc19f381 1787 DBF_DEV_EVENT(DBF_ERR, device, "%s",
ada3df91
SH		 1788 "unsolicited interrupt received "
1789 "(sense available)");
aeec92ca 1790 device->discipline->dump_sense_dbf(device, irb, "unsolicited");
ada3df91
SH		 1791 }
1792
1793 dasd_schedule_device_bh(device);
8e09f215
SW		 1794 return;
1795};
1796
f3eb5384
SW		 1797
1798static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single(
1799 struct dasd_device *startdev,
8e09f215 1800 struct dasd_block *block,
f3eb5384
SW		 1801 struct request *req,
1802 sector_t first_rec,
1803 sector_t last_rec,
1804 sector_t first_trk,
1805 sector_t last_trk,
1806 unsigned int first_offs,
1807 unsigned int last_offs,
1808 unsigned int blk_per_trk,
1809 unsigned int blksize)
1da177e4
LT		 1810{
1811 struct dasd_eckd_private *private;
1812 unsigned long *idaws;
1813 struct LO_eckd_data *LO_data;
1814 struct dasd_ccw_req *cqr;
1815 struct ccw1 *ccw;
5705f702 1816 struct req_iterator iter;
1da177e4
LT		 1817 struct bio_vec *bv;
1818 char *dst;
f3eb5384 1819 unsigned int off;
1da177e4 1820 int count, cidaw, cplength, datasize;
f3eb5384 1821 sector_t recid;
1da177e4 1822 unsigned char cmd, rcmd;
8e09f215
SW		 1823 int use_prefix;
1824 struct dasd_device *basedev;
1da177e4 1825
8e09f215
SW		 1826 basedev = block->base;
1827 private = (struct dasd_eckd_private *) basedev->private;
1da177e4
LT		 1828 if (rq_data_dir(req) == READ)
1829 cmd = DASD_ECKD_CCW_READ_MT;
1830 else if (rq_data_dir(req) == WRITE)
1831 cmd = DASD_ECKD_CCW_WRITE_MT;
1832 else
1833 return ERR_PTR(-EINVAL);
f3eb5384 1834
1da177e4
LT		 1835 /* Check struct bio and count the number of blocks for the request. */
1836 count = 0;
1837 cidaw = 0;
5705f702 1838 rq_for_each_segment(bv, req, iter) {
6c92e699
JA		 1839 if (bv->bv_len & (blksize - 1))
1840 /* Eckd can only do full blocks. */
1841 return ERR_PTR(-EINVAL);
8e09f215 1842 count += bv->bv_len >> (block->s2b_shift + 9);
347a8dc3 1843#if defined(CONFIG_64BIT)
6c92e699 1844 if (idal_is_needed (page_address(bv->bv_page), bv->bv_len))
8e09f215 1845 cidaw += bv->bv_len >> (block->s2b_shift + 9);
1da177e4 1846#endif
1da177e4
LT		 1847 }
1848 /* Paranoia. */
1849 if (count != last_rec - first_rec + 1)
1850 return ERR_PTR(-EINVAL);
8e09f215
SW		 1851
1852 /* use the prefix command if available */
1853 use_prefix = private->features.feature[8] & 0x01;
1854 if (use_prefix) {
1855 /* 1x prefix + number of blocks */
1856 cplength = 2 + count;
1857 /* 1x prefix + cidaws*sizeof(long) */
1858 datasize = sizeof(struct PFX_eckd_data) +
1859 sizeof(struct LO_eckd_data) +
1860 cidaw * sizeof(unsigned long);
1861 } else {
1862 /* 1x define extent + 1x locate record + number of blocks */
1863 cplength = 2 + count;
1864 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */
1865 datasize = sizeof(struct DE_eckd_data) +
1866 sizeof(struct LO_eckd_data) +
1867 cidaw * sizeof(unsigned long);
1868 }
1da177e4
LT		 1869 /* Find out the number of additional locate record ccws for cdl. */
1870 if (private->uses_cdl && first_rec < 2*blk_per_trk) {
1871 if (last_rec >= 2*blk_per_trk)
1872 count = 2*blk_per_trk - first_rec;
1873 cplength += count;
1874 datasize += count*sizeof(struct LO_eckd_data);
1875 }
1876 /* Allocate the ccw request. */
68b781fe
SH		 1877 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
1878 startdev);
1da177e4
LT		 1879 if (IS_ERR(cqr))
1880 return cqr;
1881 ccw = cqr->cpaddr;
8e09f215
SW		 1882 /* First ccw is define extent or prefix. */
1883 if (use_prefix) {
1884 if (prefix(ccw++, cqr->data, first_trk,
1885 last_trk, cmd, basedev, startdev) == -EAGAIN) {
1886 /* Clock not in sync and XRC is enabled.
1887 * Try again later.
1888 */
1889 dasd_sfree_request(cqr, startdev);
1890 return ERR_PTR(-EAGAIN);
1891 }
1892 idaws = (unsigned long *) (cqr->data +
1893 sizeof(struct PFX_eckd_data));
1894 } else {
1895 if (define_extent(ccw++, cqr->data, first_trk,
1896 last_trk, cmd, startdev) == -EAGAIN) {
1897 /* Clock not in sync and XRC is enabled.
1898 * Try again later.
1899 */
1900 dasd_sfree_request(cqr, startdev);
1901 return ERR_PTR(-EAGAIN);
1902 }
1903 idaws = (unsigned long *) (cqr->data +
1904 sizeof(struct DE_eckd_data));
d54853ef 1905 }
1da177e4 1906 /* Build locate_record+read/write/ccws. */
1da177e4
LT		 1907 LO_data = (struct LO_eckd_data *) (idaws + cidaw);
1908 recid = first_rec;
1909 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) {
1910 /* Only standard blocks so there is just one locate record. */
1911 ccw[-1].flags |= CCW_FLAG_CC;
1912 locate_record(ccw++, LO_data++, first_trk, first_offs + 1,
8e09f215 1913 last_rec - recid + 1, cmd, basedev, blksize);
1da177e4 1914 }
5705f702 1915 rq_for_each_segment(bv, req, iter) {
1da177e4
LT		 1916 dst = page_address(bv->bv_page) + bv->bv_offset;
1917 if (dasd_page_cache) {
1918 char *copy = kmem_cache_alloc(dasd_page_cache,
441e143e 1919 GFP_DMA | __GFP_NOWARN);
1da177e4
LT		 1920 if (copy && rq_data_dir(req) == WRITE)
1921 memcpy(copy + bv->bv_offset, dst, bv->bv_len);
1922 if (copy)
1923 dst = copy + bv->bv_offset;
1924 }
1925 for (off = 0; off < bv->bv_len; off += blksize) {
1926 sector_t trkid = recid;
1927 unsigned int recoffs = sector_div(trkid, blk_per_trk);
1928 rcmd = cmd;
1929 count = blksize;
1930 /* Locate record for cdl special block ? */
1931 if (private->uses_cdl && recid < 2*blk_per_trk) {
1932 if (dasd_eckd_cdl_special(blk_per_trk, recid)){
1933 rcmd |= 0x8;
1934 count = dasd_eckd_cdl_reclen(recid);
ec5883ab
HH		 1935 if (count < blksize &&
1936 rq_data_dir(req) == READ)
1da177e4
LT		 1937 memset(dst + count, 0xe5,
1938 blksize - count);
1939 }
1940 ccw[-1].flags |= CCW_FLAG_CC;
1941 locate_record(ccw++, LO_data++,
1942 trkid, recoffs + 1,
8e09f215 1943 1, rcmd, basedev, count);
1da177e4
LT		 1944 }
1945 /* Locate record for standard blocks ? */
1946 if (private->uses_cdl && recid == 2*blk_per_trk) {
1947 ccw[-1].flags |= CCW_FLAG_CC;
1948 locate_record(ccw++, LO_data++,
1949 trkid, recoffs + 1,
1950 last_rec - recid + 1,
8e09f215 1951 cmd, basedev, count);
1da177e4
LT		 1952 }
1953 /* Read/write ccw. */
1954 ccw[-1].flags |= CCW_FLAG_CC;
1955 ccw->cmd_code = rcmd;
1956 ccw->count = count;
1957 if (idal_is_needed(dst, blksize)) {
1958 ccw->cda = (__u32)(addr_t) idaws;
1959 ccw->flags = CCW_FLAG_IDA;
1960 idaws = idal_create_words(idaws, dst, blksize);
1961 } else {
1962 ccw->cda = (__u32)(addr_t) dst;
1963 ccw->flags = 0;
1964 }
1965 ccw++;
1966 dst += blksize;
1967 recid++;
1968 }
1969 }
13de227b
HS		 1970 if (blk_noretry_request(req) ||
1971 block->base->features & DASD_FEATURE_FAILFAST)
1c01b8a5 1972 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
8e09f215
SW		 1973 cqr->startdev = startdev;
1974 cqr->memdev = startdev;
1975 cqr->block = block;
1da177e4
LT		 1976 cqr->expires = 5 * 60 * HZ; /* 5 minutes */
1977 cqr->lpm = private->path_data.ppm;
1978 cqr->retries = 256;
1979 cqr->buildclk = get_clock();
1980 cqr->status = DASD_CQR_FILLED;
1981 return cqr;
1982}
1983
f3eb5384
SW		 1984static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track(
1985 struct dasd_device *startdev,
1986 struct dasd_block *block,
1987 struct request *req,
1988 sector_t first_rec,
1989 sector_t last_rec,
1990 sector_t first_trk,
1991 sector_t last_trk,
1992 unsigned int first_offs,
1993 unsigned int last_offs,
1994 unsigned int blk_per_trk,
1995 unsigned int blksize)
1996{
1997 struct dasd_eckd_private *private;
1998 unsigned long *idaws;
1999 struct dasd_ccw_req *cqr;
2000 struct ccw1 *ccw;
2001 struct req_iterator iter;
2002 struct bio_vec *bv;
2003 char *dst, *idaw_dst;
2004 unsigned int cidaw, cplength, datasize;
2005 unsigned int tlf;
2006 sector_t recid;
2007 unsigned char cmd;
2008 struct dasd_device *basedev;
2009 unsigned int trkcount, count, count_to_trk_end;
2010 unsigned int idaw_len, seg_len, part_len, len_to_track_end;
2011 unsigned char new_track, end_idaw;
2012 sector_t trkid;
2013 unsigned int recoffs;
2014
2015 basedev = block->base;
2016 private = (struct dasd_eckd_private *) basedev->private;
2017 if (rq_data_dir(req) == READ)
2018 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
2019 else if (rq_data_dir(req) == WRITE)
2020 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
2021 else
2022 return ERR_PTR(-EINVAL);
2023
2024 /* Track based I/O needs IDAWs for each page, and not just for
2025 * 64 bit addresses. We need additional idals for pages
2026 * that get filled from two tracks, so we use the number
2027 * of records as upper limit.
2028 */
2029 cidaw = last_rec - first_rec + 1;
2030 trkcount = last_trk - first_trk + 1;
2031
2032 /* 1x prefix + one read/write ccw per track */
2033 cplength = 1 + trkcount;
2034
2035 /* on 31-bit we need space for two 32 bit addresses per page
2036 * on 64-bit one 64 bit address
2037 */
2038 datasize = sizeof(struct PFX_eckd_data) +
2039 cidaw * sizeof(unsigned long long);
2040
2041 /* Allocate the ccw request. */
68b781fe
SH		 2042 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
2043 startdev);
f3eb5384
SW		 2044 if (IS_ERR(cqr))
2045 return cqr;
2046 ccw = cqr->cpaddr;
2047 /* transfer length factor: how many bytes to read from the last track */
2048 if (first_trk == last_trk)
2049 tlf = last_offs - first_offs + 1;
2050 else
2051 tlf = last_offs + 1;
2052 tlf *= blksize;
2053
2054 if (prefix_LRE(ccw++, cqr->data, first_trk,
2055 last_trk, cmd, basedev, startdev,
2056 1 /* format */, first_offs + 1,
2057 trkcount, blksize,
2058 tlf) == -EAGAIN) {
2059 /* Clock not in sync and XRC is enabled.
2060 * Try again later.
2061 */
2062 dasd_sfree_request(cqr, startdev);
2063 return ERR_PTR(-EAGAIN);
2064 }
2065
2066 /*
2067 * The translation of request into ccw programs must meet the
2068 * following conditions:
2069 * - all idaws but the first and the last must address full pages
2070 * (or 2K blocks on 31-bit)
2071 * - the scope of a ccw and it's idal ends with the track boundaries
2072 */
2073 idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data));
2074 recid = first_rec;
2075 new_track = 1;
2076 end_idaw = 0;
2077 len_to_track_end = 0;
2078 idaw_dst = 0;
2079 idaw_len = 0;
2080 rq_for_each_segment(bv, req, iter) {
2081 dst = page_address(bv->bv_page) + bv->bv_offset;
2082 seg_len = bv->bv_len;
2083 while (seg_len) {
2084 if (new_track) {
2085 trkid = recid;
2086 recoffs = sector_div(trkid, blk_per_trk);
2087 count_to_trk_end = blk_per_trk - recoffs;
2088 count = min((last_rec - recid + 1),
2089 (sector_t)count_to_trk_end);
2090 len_to_track_end = count * blksize;
2091 ccw[-1].flags |= CCW_FLAG_CC;
2092 ccw->cmd_code = cmd;
2093 ccw->count = len_to_track_end;
2094 ccw->cda = (__u32)(addr_t)idaws;
2095 ccw->flags = CCW_FLAG_IDA;
2096 ccw++;
2097 recid += count;
2098 new_track = 0;
52db45c3
SW		 2099 /* first idaw for a ccw may start anywhere */
2100 if (!idaw_dst)
2101 idaw_dst = dst;
f3eb5384 2102 }
52db45c3
SW		 2103 /* If we start a new idaw, we must make sure that it
2104 * starts on an IDA_BLOCK_SIZE boundary.
f3eb5384
SW		 2105 * If we continue an idaw, we must make sure that the
2106 * current segment begins where the so far accumulated
2107 * idaw ends
2108 */
52db45c3
SW		 2109 if (!idaw_dst) {
2110 if (__pa(dst) & (IDA_BLOCK_SIZE-1)) {
2111 dasd_sfree_request(cqr, startdev);
2112 return ERR_PTR(-ERANGE);
2113 } else
2114 idaw_dst = dst;
2115 }
f3eb5384
SW		 2116 if ((idaw_dst + idaw_len) != dst) {
2117 dasd_sfree_request(cqr, startdev);
2118 return ERR_PTR(-ERANGE);
2119 }
2120 part_len = min(seg_len, len_to_track_end);
2121 seg_len -= part_len;
2122 dst += part_len;
2123 idaw_len += part_len;
2124 len_to_track_end -= part_len;
2125 /* collected memory area ends on an IDA_BLOCK border,
2126 * -> create an idaw
2127 * idal_create_words will handle cases where idaw_len
2128 * is larger then IDA_BLOCK_SIZE
2129 */
2130 if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1)))
2131 end_idaw = 1;
2132 /* We also need to end the idaw at track end */
2133 if (!len_to_track_end) {
2134 new_track = 1;
2135 end_idaw = 1;
2136 }
2137 if (end_idaw) {
2138 idaws = idal_create_words(idaws, idaw_dst,
2139 idaw_len);
2140 idaw_dst = 0;
2141 idaw_len = 0;
2142 end_idaw = 0;
2143 }
2144 }
2145 }
2146
2147 if (blk_noretry_request(req) ||
2148 block->base->features & DASD_FEATURE_FAILFAST)
2149 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2150 cqr->startdev = startdev;
2151 cqr->memdev = startdev;
2152 cqr->block = block;
2153 cqr->expires = 5 * 60 * HZ; /* 5 minutes */
2154 cqr->lpm = private->path_data.ppm;
2155 cqr->retries = 256;
2156 cqr->buildclk = get_clock();
2157 cqr->status = DASD_CQR_FILLED;
2158 return cqr;
2159}
2160
2161static int prepare_itcw(struct itcw *itcw,
2162 unsigned int trk, unsigned int totrk, int cmd,
2163 struct dasd_device *basedev,
2164 struct dasd_device *startdev,
2165 unsigned int rec_on_trk, int count,
2166 unsigned int blksize,
2167 unsigned int total_data_size,
2168 unsigned int tlf,
2169 unsigned int blk_per_trk)
2170{
2171 struct PFX_eckd_data pfxdata;
2172 struct dasd_eckd_private *basepriv, *startpriv;
2173 struct DE_eckd_data *dedata;
2174 struct LRE_eckd_data *lredata;
2175 struct dcw *dcw;
2176
2177 u32 begcyl, endcyl;
2178 u16 heads, beghead, endhead;
2179 u8 pfx_cmd;
2180
2181 int rc = 0;
2182 int sector = 0;
2183 int dn, d;
2184
2185
2186 /* setup prefix data */
2187 basepriv = (struct dasd_eckd_private *) basedev->private;
2188 startpriv = (struct dasd_eckd_private *) startdev->private;
2189 dedata = &pfxdata.define_extent;
2190 lredata = &pfxdata.locate_record;
2191
2192 memset(&pfxdata, 0, sizeof(pfxdata));
2193 pfxdata.format = 1; /* PFX with LRE */
2194 pfxdata.base_address = basepriv->ned->unit_addr;
2195 pfxdata.base_lss = basepriv->ned->ID;
2196 pfxdata.validity.define_extent = 1;
2197
2198 /* private uid is kept up to date, conf_data may be outdated */
2199 if (startpriv->uid.type != UA_BASE_DEVICE) {
2200 pfxdata.validity.verify_base = 1;
2201 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS)
2202 pfxdata.validity.hyper_pav = 1;
2203 }
2204
2205 switch (cmd) {
2206 case DASD_ECKD_CCW_READ_TRACK_DATA:
2207 dedata->mask.perm = 0x1;
2208 dedata->attributes.operation = basepriv->attrib.operation;
2209 dedata->blk_size = blksize;
2210 dedata->ga_extended |= 0x42;
2211 lredata->operation.orientation = 0x0;
2212 lredata->operation.operation = 0x0C;
2213 lredata->auxiliary.check_bytes = 0x01;
2214 pfx_cmd = DASD_ECKD_CCW_PFX_READ;
2215 break;
2216 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
2217 dedata->mask.perm = 0x02;
2218 dedata->attributes.operation = basepriv->attrib.operation;
2219 dedata->blk_size = blksize;
2220 rc = check_XRC_on_prefix(&pfxdata, basedev);
2221 dedata->ga_extended |= 0x42;
2222 lredata->operation.orientation = 0x0;
2223 lredata->operation.operation = 0x3F;
2224 lredata->extended_operation = 0x23;
2225 lredata->auxiliary.check_bytes = 0x2;
2226 pfx_cmd = DASD_ECKD_CCW_PFX;
2227 break;
2228 default:
2229 DBF_DEV_EVENT(DBF_ERR, basedev,
2230 "prepare itcw, unknown opcode 0x%x", cmd);
2231 BUG();
2232 break;
2233 }
2234 if (rc)
2235 return rc;
2236
2237 dedata->attributes.mode = 0x3; /* ECKD */
2238
2239 heads = basepriv->rdc_data.trk_per_cyl;
2240 begcyl = trk / heads;
2241 beghead = trk % heads;
2242 endcyl = totrk / heads;
2243 endhead = totrk % heads;
2244
2245 /* check for sequential prestage - enhance cylinder range */
2246 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE ||
2247 dedata->attributes.operation == DASD_SEQ_ACCESS) {
2248
2249 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl)
2250 endcyl += basepriv->attrib.nr_cyl;
2251 else
2252 endcyl = (basepriv->real_cyl - 1);
2253 }
2254
2255 set_ch_t(&dedata->beg_ext, begcyl, beghead);
2256 set_ch_t(&dedata->end_ext, endcyl, endhead);
2257
2258 dedata->ep_format = 0x20; /* records per track is valid */
2259 dedata->ep_rec_per_track = blk_per_trk;
2260
2261 if (rec_on_trk) {
2262 switch (basepriv->rdc_data.dev_type) {
2263 case 0x3390:
2264 dn = ceil_quot(blksize + 6, 232);
2265 d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34);
2266 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
2267 break;
2268 case 0x3380:
2269 d = 7 + ceil_quot(blksize + 12, 32);
2270 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
2271 break;
2272 }
2273 }
2274
2275 lredata->auxiliary.length_valid = 1;
2276 lredata->auxiliary.length_scope = 1;
2277 lredata->auxiliary.imbedded_ccw_valid = 1;
2278 lredata->length = tlf;
2279 lredata->imbedded_ccw = cmd;
2280 lredata->count = count;
2281 lredata->sector = sector;
2282 set_ch_t(&lredata->seek_addr, begcyl, beghead);
2283 lredata->search_arg.cyl = lredata->seek_addr.cyl;
2284 lredata->search_arg.head = lredata->seek_addr.head;
2285 lredata->search_arg.record = rec_on_trk;
2286
2287 dcw = itcw_add_dcw(itcw, pfx_cmd, 0,
2288 &pfxdata, sizeof(pfxdata), total_data_size);
2289
2290 return rc;
2291}
2292
2293static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track(
2294 struct dasd_device *startdev,
2295 struct dasd_block *block,
2296 struct request *req,
2297 sector_t first_rec,
2298 sector_t last_rec,
2299 sector_t first_trk,
2300 sector_t last_trk,
2301 unsigned int first_offs,
2302 unsigned int last_offs,
2303 unsigned int blk_per_trk,
2304 unsigned int blksize)
2305{
2306 struct dasd_eckd_private *private;
2307 struct dasd_ccw_req *cqr;
2308 struct req_iterator iter;
2309 struct bio_vec *bv;
2310 char *dst;
2311 unsigned int trkcount, ctidaw;
2312 unsigned char cmd;
2313 struct dasd_device *basedev;
2314 unsigned int tlf;
2315 struct itcw *itcw;
2316 struct tidaw *last_tidaw = NULL;
2317 int itcw_op;
2318 size_t itcw_size;
2319
2320 basedev = block->base;
2321 private = (struct dasd_eckd_private *) basedev->private;
2322 if (rq_data_dir(req) == READ) {
2323 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
2324 itcw_op = ITCW_OP_READ;
2325 } else if (rq_data_dir(req) == WRITE) {
2326 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
2327 itcw_op = ITCW_OP_WRITE;
2328 } else
2329 return ERR_PTR(-EINVAL);
2330
2331 /* trackbased I/O needs address all memory via TIDAWs,
2332 * not just for 64 bit addresses. This allows us to map
2333 * each segment directly to one tidaw.
2334 */
2335 trkcount = last_trk - first_trk + 1;
2336 ctidaw = 0;
2337 rq_for_each_segment(bv, req, iter) {
2338 ++ctidaw;
2339 }
2340
2341 /* Allocate the ccw request. */
2342 itcw_size = itcw_calc_size(0, ctidaw, 0);
68b781fe 2343 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev);
f3eb5384
SW		 2344 if (IS_ERR(cqr))
2345 return cqr;
2346
2347 cqr->cpmode = 1;
2348 cqr->startdev = startdev;
2349 cqr->memdev = startdev;
2350 cqr->block = block;
2351 cqr->expires = 100*HZ;
2352 cqr->buildclk = get_clock();
2353 cqr->status = DASD_CQR_FILLED;
2354 cqr->retries = 10;
2355
2356 /* transfer length factor: how many bytes to read from the last track */
2357 if (first_trk == last_trk)
2358 tlf = last_offs - first_offs + 1;
2359 else
2360 tlf = last_offs + 1;
2361 tlf *= blksize;
2362
2363 itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0);
2364 cqr->cpaddr = itcw_get_tcw(itcw);
2365
2366 if (prepare_itcw(itcw, first_trk, last_trk,
2367 cmd, basedev, startdev,
2368 first_offs + 1,
2369 trkcount, blksize,
2370 (last_rec - first_rec + 1) * blksize,
2371 tlf, blk_per_trk) == -EAGAIN) {
2372 /* Clock not in sync and XRC is enabled.
2373 * Try again later.
2374 */
2375 dasd_sfree_request(cqr, startdev);
2376 return ERR_PTR(-EAGAIN);
2377 }
2378
2379 /*
2380 * A tidaw can address 4k of memory, but must not cross page boundaries
2381 * We can let the block layer handle this by setting
2382 * blk_queue_segment_boundary to page boundaries and
2383 * blk_max_segment_size to page size when setting up the request queue.
2384 */
2385 rq_for_each_segment(bv, req, iter) {
2386 dst = page_address(bv->bv_page) + bv->bv_offset;
2387 last_tidaw = itcw_add_tidaw(itcw, 0x00, dst, bv->bv_len);
2388 if (IS_ERR(last_tidaw))
2389 return (struct dasd_ccw_req *)last_tidaw;
2390 }
2391
2392 last_tidaw->flags |= 0x80;
2393 itcw_finalize(itcw);
2394
2395 if (blk_noretry_request(req) ||
2396 block->base->features & DASD_FEATURE_FAILFAST)
2397 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2398 cqr->startdev = startdev;
2399 cqr->memdev = startdev;
2400 cqr->block = block;
2401 cqr->expires = 5 * 60 * HZ; /* 5 minutes */
2402 cqr->lpm = private->path_data.ppm;
2403 cqr->retries = 256;
2404 cqr->buildclk = get_clock();
2405 cqr->status = DASD_CQR_FILLED;
2406 return cqr;
2407}
2408
2409static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev,
2410 struct dasd_block *block,
2411 struct request *req)
2412{
2413 int tpm, cmdrtd, cmdwtd;
2414 int use_prefix;
45b44d76 2415#if defined(CONFIG_64BIT)
f3eb5384 2416 int fcx_in_css, fcx_in_gneq, fcx_in_features;
45b44d76
SW		 2417#endif
2418 struct dasd_eckd_private *private;
f3eb5384
SW		 2419 struct dasd_device *basedev;
2420 sector_t first_rec, last_rec;
2421 sector_t first_trk, last_trk;
2422 unsigned int first_offs, last_offs;
2423 unsigned int blk_per_trk, blksize;
2424 int cdlspecial;
2425 struct dasd_ccw_req *cqr;
2426
2427 basedev = block->base;
2428 private = (struct dasd_eckd_private *) basedev->private;
2429
2430 /* Calculate number of blocks/records per track. */
2431 blksize = block->bp_block;
2432 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
6fca97a9
SH		 2433 if (blk_per_trk == 0)
2434 return ERR_PTR(-EINVAL);
f3eb5384 2435 /* Calculate record id of first and last block. */
83096ebf 2436 first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift;
f3eb5384
SW		 2437 first_offs = sector_div(first_trk, blk_per_trk);
2438 last_rec = last_trk =
83096ebf 2439 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift;
f3eb5384
SW		 2440 last_offs = sector_div(last_trk, blk_per_trk);
2441 cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk);
2442
45b44d76
SW		 2443 /* is transport mode supported? */
2444#if defined(CONFIG_64BIT)
f3eb5384
SW		 2445 fcx_in_css = css_general_characteristics.fcx;
2446 fcx_in_gneq = private->gneq->reserved2[7] & 0x04;
2447 fcx_in_features = private->features.feature[40] & 0x80;
2448 tpm = fcx_in_css && fcx_in_gneq && fcx_in_features;
45b44d76
SW		 2449#else
2450 tpm = 0;
2451#endif
f3eb5384
SW		 2452
2453 /* is read track data and write track data in command mode supported? */
2454 cmdrtd = private->features.feature[9] & 0x20;
2455 cmdwtd = private->features.feature[12] & 0x40;
2456 use_prefix = private->features.feature[8] & 0x01;
2457
2458 cqr = NULL;
2459 if (cdlspecial || dasd_page_cache) {
2460 /* do nothing, just fall through to the cmd mode single case */
2461 } else if (!dasd_nofcx && tpm && (first_trk == last_trk)) {
2462 cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req,
2463 first_rec, last_rec,
2464 first_trk, last_trk,
2465 first_offs, last_offs,
2466 blk_per_trk, blksize);
2467 if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN)
2468 cqr = NULL;
2469 } else if (use_prefix &&
2470 (((rq_data_dir(req) == READ) && cmdrtd) ||
2471 ((rq_data_dir(req) == WRITE) && cmdwtd))) {
2472 cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req,
2473 first_rec, last_rec,
2474 first_trk, last_trk,
2475 first_offs, last_offs,
2476 blk_per_trk, blksize);
2477 if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN)
2478 cqr = NULL;
2479 }
2480 if (!cqr)
2481 cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req,
2482 first_rec, last_rec,
2483 first_trk, last_trk,
2484 first_offs, last_offs,
2485 blk_per_trk, blksize);
2486 return cqr;
2487}
2488
1da177e4
LT		 2489static int
2490dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req)
2491{
2492 struct dasd_eckd_private *private;
2493 struct ccw1 *ccw;
5705f702 2494 struct req_iterator iter;
1da177e4
LT		 2495 struct bio_vec *bv;
2496 char *dst, *cda;
2497 unsigned int blksize, blk_per_trk, off;
2498 sector_t recid;
5705f702 2499 int status;
1da177e4
LT		 2500
2501 if (!dasd_page_cache)
2502 goto out;
8e09f215
SW		 2503 private = (struct dasd_eckd_private *) cqr->block->base->private;
2504 blksize = cqr->block->bp_block;
1da177e4 2505 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
83096ebf 2506 recid = blk_rq_pos(req) >> cqr->block->s2b_shift;
1da177e4
LT		 2507 ccw = cqr->cpaddr;
2508 /* Skip over define extent & locate record. */
2509 ccw++;
2510 if (private->uses_cdl == 0 || recid > 2*blk_per_trk)
2511 ccw++;
5705f702 2512 rq_for_each_segment(bv, req, iter) {
1da177e4
LT		 2513 dst = page_address(bv->bv_page) + bv->bv_offset;
2514 for (off = 0; off < bv->bv_len; off += blksize) {
2515 /* Skip locate record. */
2516 if (private->uses_cdl && recid <= 2*blk_per_trk)
2517 ccw++;
2518 if (dst) {
2519 if (ccw->flags & CCW_FLAG_IDA)
2520 cda = *((char **)((addr_t) ccw->cda));
2521 else
2522 cda = (char *)((addr_t) ccw->cda);
2523 if (dst != cda) {
2524 if (rq_data_dir(req) == READ)
2525 memcpy(dst, cda, bv->bv_len);
2526 kmem_cache_free(dasd_page_cache,
2527 (void *)((addr_t)cda & PAGE_MASK));
2528 }
2529 dst = NULL;
2530 }
2531 ccw++;
2532 recid++;
2533 }
2534 }
2535out:
2536 status = cqr->status == DASD_CQR_DONE;
8e09f215 2537 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 2538 return status;
2539}
2540
8e09f215 2541/*
f3eb5384 2542 * Modify ccw/tcw in cqr so it can be started on a base device.
8e09f215
SW		 2543 *
2544 * Note that this is not enough to restart the cqr!
2545 * Either reset cqr->startdev as well (summary unit check handling)
2546 * or restart via separate cqr (as in ERP handling).
2547 */
2548void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr)
2549{
2550 struct ccw1 *ccw;
2551 struct PFX_eckd_data *pfxdata;
f3eb5384
SW		 2552 struct tcw *tcw;
2553 struct tccb *tccb;
2554 struct dcw *dcw;
2555
2556 if (cqr->cpmode == 1) {
2557 tcw = cqr->cpaddr;
2558 tccb = tcw_get_tccb(tcw);
2559 dcw = (struct dcw *)&tccb->tca[0];
2560 pfxdata = (struct PFX_eckd_data *)&dcw->cd[0];
8e09f215
SW		 2561 pfxdata->validity.verify_base = 0;
2562 pfxdata->validity.hyper_pav = 0;
f3eb5384
SW		 2563 } else {
2564 ccw = cqr->cpaddr;
2565 pfxdata = cqr->data;
2566 if (ccw->cmd_code == DASD_ECKD_CCW_PFX) {
2567 pfxdata->validity.verify_base = 0;
2568 pfxdata->validity.hyper_pav = 0;
2569 }
8e09f215
SW		 2570 }
2571}
2572
2573#define DASD_ECKD_CHANQ_MAX_SIZE 4
2574
2575static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base,
2576 struct dasd_block *block,
2577 struct request *req)
2578{
2579 struct dasd_eckd_private *private;
2580 struct dasd_device *startdev;
2581 unsigned long flags;
2582 struct dasd_ccw_req *cqr;
2583
2584 startdev = dasd_alias_get_start_dev(base);
2585 if (!startdev)
2586 startdev = base;
2587 private = (struct dasd_eckd_private *) startdev->private;
2588 if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE)
2589 return ERR_PTR(-EBUSY);
2590
2591 spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags);
2592 private->count++;
2593 cqr = dasd_eckd_build_cp(startdev, block, req);
2594 if (IS_ERR(cqr))
2595 private->count--;
2596 spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags);
2597 return cqr;
2598}
2599
2600static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr,
2601 struct request *req)
2602{
2603 struct dasd_eckd_private *private;
2604 unsigned long flags;
2605
2606 spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags);
2607 private = (struct dasd_eckd_private *) cqr->memdev->private;
2608 private->count--;
2609 spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags);
2610 return dasd_eckd_free_cp(cqr, req);
2611}
2612
1da177e4
LT		 2613static int
2614dasd_eckd_fill_info(struct dasd_device * device,
2615 struct dasd_information2_t * info)
2616{
2617 struct dasd_eckd_private *private;
2618
2619 private = (struct dasd_eckd_private *) device->private;
2620 info->label_block = 2;
2621 info->FBA_layout = private->uses_cdl ? 0 : 1;
2622 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL;
2623 info->characteristics_size = sizeof(struct dasd_eckd_characteristics);
2624 memcpy(info->characteristics, &private->rdc_data,
2625 sizeof(struct dasd_eckd_characteristics));
4abb08c2
SW		 2626 info->confdata_size = min((unsigned long)private->conf_len,
2627 sizeof(info->configuration_data));
2628 memcpy(info->configuration_data, private->conf_data,
2629 info->confdata_size);
1da177e4
LT		 2630 return 0;
2631}
2632
2633/*
2634 * SECTION: ioctl functions for eckd devices.
2635 */
2636
2637/*
2638 * Release device ioctl.
138c014d 2639 * Buils a channel programm to releases a prior reserved
1da177e4
LT		 2640 * (see dasd_eckd_reserve) device.
2641 */
2642static int
1107ccfb 2643dasd_eckd_release(struct dasd_device *device)
1da177e4 2644{
1da177e4
LT		 2645 struct dasd_ccw_req *cqr;
2646 int rc;
f3eb5384 2647 struct ccw1 *ccw;
1da177e4
LT		 2648
2649 if (!capable(CAP_SYS_ADMIN))
2650 return -EACCES;
2651
68b781fe 2652 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
1da177e4 2653 if (IS_ERR(cqr)) {
fc19f381 2654 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 2655 "Could not allocate initialization request");
2656 return PTR_ERR(cqr);
2657 }
f3eb5384
SW		 2658 ccw = cqr->cpaddr;
2659 ccw->cmd_code = DASD_ECKD_CCW_RELEASE;
2660 ccw->flags |= CCW_FLAG_SLI;
2661 ccw->count = 32;
2662 ccw->cda = (__u32)(addr_t) cqr->data;
8e09f215
SW		 2663 cqr->startdev = device;
2664 cqr->memdev = device;
1da177e4 2665 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 2666 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
336c340b 2667 cqr->retries = 2; /* set retry counter to enable basic ERP */
1da177e4
LT		 2668 cqr->expires = 2 * HZ;
2669 cqr->buildclk = get_clock();
2670 cqr->status = DASD_CQR_FILLED;
2671
2672 rc = dasd_sleep_on_immediatly(cqr);
2673
8e09f215 2674 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 2675 return rc;
2676}
2677
2678/*
2679 * Reserve device ioctl.
2680 * Options are set to 'synchronous wait for interrupt' and
138c014d
HH		 2681 * 'timeout the request'. This leads to a terminate IO if
2682 * the interrupt is outstanding for a certain time.
1da177e4
LT		 2683 */
2684static int
1107ccfb 2685dasd_eckd_reserve(struct dasd_device *device)
1da177e4 2686{
1da177e4
LT		 2687 struct dasd_ccw_req *cqr;
2688 int rc;
f3eb5384 2689 struct ccw1 *ccw;
1da177e4
LT		 2690
2691 if (!capable(CAP_SYS_ADMIN))
2692 return -EACCES;
2693
68b781fe 2694 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
1da177e4 2695 if (IS_ERR(cqr)) {
fc19f381 2696 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 2697 "Could not allocate initialization request");
2698 return PTR_ERR(cqr);
2699 }
f3eb5384
SW		 2700 ccw = cqr->cpaddr;
2701 ccw->cmd_code = DASD_ECKD_CCW_RESERVE;
2702 ccw->flags |= CCW_FLAG_SLI;
2703 ccw->count = 32;
2704 ccw->cda = (__u32)(addr_t) cqr->data;
8e09f215
SW		 2705 cqr->startdev = device;
2706 cqr->memdev = device;
1da177e4 2707 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 2708 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
336c340b 2709 cqr->retries = 2; /* set retry counter to enable basic ERP */
1da177e4
LT		 2710 cqr->expires = 2 * HZ;
2711 cqr->buildclk = get_clock();
2712 cqr->status = DASD_CQR_FILLED;
2713
2714 rc = dasd_sleep_on_immediatly(cqr);
2715
8e09f215 2716 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 2717 return rc;
2718}
2719
2720/*
2721 * Steal lock ioctl - unconditional reserve device.
138c014d 2722 * Buils a channel programm to break a device's reservation.
1da177e4
LT		 2723 * (unconditional reserve)
2724 */
2725static int
1107ccfb 2726dasd_eckd_steal_lock(struct dasd_device *device)
1da177e4 2727{
1da177e4
LT		 2728 struct dasd_ccw_req *cqr;
2729 int rc;
f3eb5384 2730 struct ccw1 *ccw;
1da177e4
LT		 2731
2732 if (!capable(CAP_SYS_ADMIN))
2733 return -EACCES;
2734
68b781fe 2735 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
1da177e4 2736 if (IS_ERR(cqr)) {
fc19f381 2737 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 2738 "Could not allocate initialization request");
2739 return PTR_ERR(cqr);
2740 }
f3eb5384
SW		 2741 ccw = cqr->cpaddr;
2742 ccw->cmd_code = DASD_ECKD_CCW_SLCK;
2743 ccw->flags |= CCW_FLAG_SLI;
2744 ccw->count = 32;
2745 ccw->cda = (__u32)(addr_t) cqr->data;
8e09f215
SW		 2746 cqr->startdev = device;
2747 cqr->memdev = device;
1da177e4 2748 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 2749 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
336c340b 2750 cqr->retries = 2; /* set retry counter to enable basic ERP */
1da177e4
LT		 2751 cqr->expires = 2 * HZ;
2752 cqr->buildclk = get_clock();
2753 cqr->status = DASD_CQR_FILLED;
2754
2755 rc = dasd_sleep_on_immediatly(cqr);
2756
8e09f215 2757 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 2758 return rc;
2759}
2760
2761/*
2762 * Read performance statistics
2763 */
2764static int
1107ccfb 2765dasd_eckd_performance(struct dasd_device *device, void __user *argp)
1da177e4 2766{
1da177e4
LT		 2767 struct dasd_psf_prssd_data *prssdp;
2768 struct dasd_rssd_perf_stats_t *stats;
2769 struct dasd_ccw_req *cqr;
2770 struct ccw1 *ccw;
2771 int rc;
2772
68b781fe 2773 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
8e09f215
SW		 2774 (sizeof(struct dasd_psf_prssd_data) +
2775 sizeof(struct dasd_rssd_perf_stats_t)),
1da177e4
LT		 2776 device);
2777 if (IS_ERR(cqr)) {
fc19f381 2778 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 2779 "Could not allocate initialization request");
2780 return PTR_ERR(cqr);
2781 }
8e09f215
SW		 2782 cqr->startdev = device;
2783 cqr->memdev = device;
1da177e4 2784 cqr->retries = 0;
eb6e199b 2785 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1da177e4
LT		 2786 cqr->expires = 10 * HZ;
2787
2788 /* Prepare for Read Subsystem Data */
2789 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
8e09f215 2790 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
1da177e4 2791 prssdp->order = PSF_ORDER_PRSSD;
5d67d164 2792 prssdp->suborder = 0x01; /* Performance Statistics */
1da177e4
LT		 2793 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */
2794
2795 ccw = cqr->cpaddr;
2796 ccw->cmd_code = DASD_ECKD_CCW_PSF;
8e09f215 2797 ccw->count = sizeof(struct dasd_psf_prssd_data);
1da177e4
LT		 2798 ccw->flags |= CCW_FLAG_CC;
2799 ccw->cda = (__u32)(addr_t) prssdp;
2800
2801 /* Read Subsystem Data - Performance Statistics */
2802 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
8e09f215 2803 memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t));
1da177e4
LT		 2804
2805 ccw++;
2806 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
8e09f215 2807 ccw->count = sizeof(struct dasd_rssd_perf_stats_t);
1da177e4
LT		 2808 ccw->cda = (__u32)(addr_t) stats;
2809
2810 cqr->buildclk = get_clock();
2811 cqr->status = DASD_CQR_FILLED;
2812 rc = dasd_sleep_on(cqr);
2813 if (rc == 0) {
1da177e4
LT		 2814 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
2815 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
1107ccfb
CH		 2816 if (copy_to_user(argp, stats,
2817 sizeof(struct dasd_rssd_perf_stats_t)))
2818 rc = -EFAULT;
1da177e4 2819 }
8e09f215 2820 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 2821 return rc;
2822}
2823
2824/*
2825 * Get attributes (cache operations)
2826 * Returnes the cache attributes used in Define Extend (DE).
2827 */
2828static int
1107ccfb 2829dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp)
1da177e4 2830{
1107ccfb
CH		 2831 struct dasd_eckd_private *private =
2832 (struct dasd_eckd_private *)device->private;
2833 struct attrib_data_t attrib = private->attrib;
1da177e4
LT		 2834 int rc;
2835
2836 if (!capable(CAP_SYS_ADMIN))
2837 return -EACCES;
1107ccfb 2838 if (!argp)
1da177e4
LT		 2839 return -EINVAL;
2840
1107ccfb
CH		 2841 rc = 0;
2842 if (copy_to_user(argp, (long *) &attrib,
8e09f215 2843 sizeof(struct attrib_data_t)))
1107ccfb 2844 rc = -EFAULT;
1da177e4
LT		 2845
2846 return rc;
2847}
2848
2849/*
2850 * Set attributes (cache operations)
2851 * Stores the attributes for cache operation to be used in Define Extend (DE).
2852 */
2853static int
1107ccfb 2854dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp)
1da177e4 2855{
1107ccfb
CH		 2856 struct dasd_eckd_private *private =
2857 (struct dasd_eckd_private *)device->private;
1da177e4
LT		 2858 struct attrib_data_t attrib;
2859
2860 if (!capable(CAP_SYS_ADMIN))
2861 return -EACCES;
1107ccfb 2862 if (!argp)
1da177e4
LT		 2863 return -EINVAL;
2864
1107ccfb 2865 if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t)))
1da177e4 2866 return -EFAULT;
1da177e4
LT		 2867 private->attrib = attrib;
2868
fc19f381
SH		 2869 dev_info(&device->cdev->dev,
2870 "The DASD cache mode was set to %x (%i cylinder prestage)\n",
2871 private->attrib.operation, private->attrib.nr_cyl);
1da177e4
LT		 2872 return 0;
2873}
2874
ab1d848f
NH		 2875/*
2876 * Issue syscall I/O to EMC Symmetrix array.
2877 * CCWs are PSF and RSSD
2878 */
2879static int dasd_symm_io(struct dasd_device *device, void __user *argp)
2880{
2881 struct dasd_symmio_parms usrparm;
2882 char *psf_data, *rssd_result;
2883 struct dasd_ccw_req *cqr;
2884 struct ccw1 *ccw;
52898025 2885 char psf0, psf1;
ab1d848f
NH		 2886 int rc;
2887
52898025
NH		 2888 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
2889 return -EACCES;
2890 psf0 = psf1 = 0;
2891
ab1d848f
NH		 2892 /* Copy parms from caller */
2893 rc = -EFAULT;
2894 if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
2895 goto out;
f8b06859
HC		 2896 if (is_compat_task() || sizeof(long) == 4) {
2897 /* Make sure pointers are sane even on 31 bit. */
ab1d848f 2898 rc = -EINVAL;
f8b06859
HC		 2899 if ((usrparm.psf_data >> 32) != 0)
2900 goto out;
2901 if ((usrparm.rssd_result >> 32) != 0)
2902 goto out;
2903 usrparm.psf_data &= 0x7fffffffULL;
2904 usrparm.rssd_result &= 0x7fffffffULL;
ab1d848f 2905 }
ab1d848f
NH		 2906 /* alloc I/O data area */
2907 psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA);
2908 rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA);
2909 if (!psf_data || !rssd_result) {
2910 rc = -ENOMEM;
2911 goto out_free;
2912 }
2913
2914 /* get syscall header from user space */
2915 rc = -EFAULT;
2916 if (copy_from_user(psf_data,
2917 (void __user *)(unsigned long) usrparm.psf_data,
2918 usrparm.psf_data_len))
2919 goto out_free;
52898025
NH		 2920 psf0 = psf_data[0];
2921 psf1 = psf_data[1];
ab1d848f
NH		 2922
2923 /* setup CCWs for PSF + RSSD */
68b781fe 2924 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device);
ab1d848f 2925 if (IS_ERR(cqr)) {
fc19f381 2926 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
ab1d848f
NH		 2927 "Could not allocate initialization request");
2928 rc = PTR_ERR(cqr);
2929 goto out_free;
2930 }
2931
2932 cqr->startdev = device;
2933 cqr->memdev = device;
2934 cqr->retries = 3;
2935 cqr->expires = 10 * HZ;
2936 cqr->buildclk = get_clock();
2937 cqr->status = DASD_CQR_FILLED;
2938
2939 /* Build the ccws */
2940 ccw = cqr->cpaddr;
2941
2942 /* PSF ccw */
2943 ccw->cmd_code = DASD_ECKD_CCW_PSF;
2944 ccw->count = usrparm.psf_data_len;
2945 ccw->flags |= CCW_FLAG_CC;
2946 ccw->cda = (__u32)(addr_t) psf_data;
2947
2948 ccw++;
2949
2950 /* RSSD ccw */
2951 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
2952 ccw->count = usrparm.rssd_result_len;
2953 ccw->flags = CCW_FLAG_SLI ;
2954 ccw->cda = (__u32)(addr_t) rssd_result;
2955
2956 rc = dasd_sleep_on(cqr);
2957 if (rc)
2958 goto out_sfree;
2959
2960 rc = -EFAULT;
2961 if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result,
2962 rssd_result, usrparm.rssd_result_len))
2963 goto out_sfree;
2964 rc = 0;
2965
2966out_sfree:
2967 dasd_sfree_request(cqr, cqr->memdev);
2968out_free:
2969 kfree(rssd_result);
2970 kfree(psf_data);
2971out:
52898025
NH		 2972 DBF_DEV_EVENT(DBF_WARNING, device,
2973 "Symmetrix ioctl (0x%02x 0x%02x): rc=%d",
2974 (int) psf0, (int) psf1, rc);
ab1d848f
NH		 2975 return rc;
2976}
2977
1107ccfb 2978static int
8e09f215 2979dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp)
1107ccfb 2980{
8e09f215
SW		 2981 struct dasd_device *device = block->base;
2982
1107ccfb
CH		 2983 switch (cmd) {
2984 case BIODASDGATTR:
2985 return dasd_eckd_get_attrib(device, argp);
2986 case BIODASDSATTR:
2987 return dasd_eckd_set_attrib(device, argp);
2988 case BIODASDPSRD:
2989 return dasd_eckd_performance(device, argp);
2990 case BIODASDRLSE:
2991 return dasd_eckd_release(device);
2992 case BIODASDRSRV:
2993 return dasd_eckd_reserve(device);
2994 case BIODASDSLCK:
2995 return dasd_eckd_steal_lock(device);
ab1d848f
NH		 2996 case BIODASDSYMMIO:
2997 return dasd_symm_io(device, argp);
1107ccfb
CH		 2998 default:
2999 return -ENOIOCTLCMD;
3000 }
3001}
3002
445b5b49
HH		 3003/*
3004 * Dump the range of CCWs into 'page' buffer
3005 * and return number of printed chars.
3006 */
4d284cac 3007static int
445b5b49
HH		 3008dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page)
3009{
3010 int len, count;
3011 char *datap;
3012
3013 len = 0;
3014 while (from <= to) {
3015 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3016 " CCW %p: %08X %08X DAT:",
3017 from, ((int *) from)[0], ((int *) from)[1]);
3018
3019 /* get pointer to data (consider IDALs) */
3020 if (from->flags & CCW_FLAG_IDA)
3021 datap = (char *) *((addr_t *) (addr_t) from->cda);
3022 else
3023 datap = (char *) ((addr_t) from->cda);
3024
3025 /* dump data (max 32 bytes) */
3026 for (count = 0; count < from->count && count < 32; count++) {
3027 if (count % 8 == 0) len += sprintf(page + len, " ");
3028 if (count % 4 == 0) len += sprintf(page + len, " ");
3029 len += sprintf(page + len, "%02x", datap[count]);
3030 }
3031 len += sprintf(page + len, "\n");
3032 from++;
3033 }
3034 return len;
3035}
3036
fc19f381 3037static void
aeec92ca
SH		 3038dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb,
3039 char *reason)
fc19f381
SH		 3040{
3041 u64 *sense;
aeec92ca
SH		 3042
3043 sense = (u64 *) dasd_get_sense(irb);
fc19f381 3044 if (sense) {
aeec92ca
SH		 3045 DBF_DEV_EVENT(DBF_EMERG, device,
3046 "%s: %s %02x%02x%02x %016llx %016llx %016llx "
3047 "%016llx", reason,
3048 scsw_is_tm(&irb->scsw) ? "t" : "c",
3049 scsw_cc(&irb->scsw), scsw_cstat(&irb->scsw),
3050 scsw_dstat(&irb->scsw), sense[0], sense[1],
3051 sense[2], sense[3]);
fc19f381
SH		 3052 } else {
3053 DBF_DEV_EVENT(DBF_EMERG, device, "%s",
3054 "SORRY - NO VALID SENSE AVAILABLE\n");
3055 }
3056}
3057
1da177e4
LT		 3058/*
3059 * Print sense data and related channel program.
3060 * Parts are printed because printk buffer is only 1024 bytes.
3061 */
f3eb5384 3062static void dasd_eckd_dump_sense_ccw(struct dasd_device *device,
8e09f215 3063 struct dasd_ccw_req *req, struct irb *irb)
1da177e4
LT		 3064{
3065 char *page;
445b5b49
HH		 3066 struct ccw1 *first, *last, *fail, *from, *to;
3067 int len, sl, sct;
1da177e4
LT		 3068
3069 page = (char *) get_zeroed_page(GFP_ATOMIC);
3070 if (page == NULL) {
fc19f381
SH		 3071 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
3072 "No memory to dump sense data\n");
1da177e4
LT		 3073 return;
3074 }
445b5b49
HH		 3075 /* dump the sense data */
3076 len = sprintf(page, KERN_ERR PRINTK_HEADER
1da177e4 3077 " I/O status report for device %s:\n",
2a0217d5 3078 dev_name(&device->cdev->dev));
1da177e4 3079 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
6cc7f168
SW		 3080 " in req: %p CS: 0x%02X DS: 0x%02X CC: 0x%02X RC: %d\n",
3081 req, scsw_cstat(&irb->scsw), scsw_dstat(&irb->scsw),
294001a8 3082 scsw_cc(&irb->scsw), req ? req->intrc : 0);
1da177e4
LT		 3083 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3084 " device %s: Failing CCW: %p\n",
2a0217d5 3085 dev_name(&device->cdev->dev),
23d805b6 3086 (void *) (addr_t) irb->scsw.cmd.cpa);
1da177e4
LT		 3087 if (irb->esw.esw0.erw.cons) {
3088 for (sl = 0; sl < 4; sl++) {
3089 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3090 " Sense(hex) %2d-%2d:",
3091 (8 * sl), ((8 * sl) + 7));
3092
3093 for (sct = 0; sct < 8; sct++) {
3094 len += sprintf(page + len, " %02x",
3095 irb->ecw[8 * sl + sct]);
3096 }
3097 len += sprintf(page + len, "\n");
3098 }
3099
3100 if (irb->ecw[27] & DASD_SENSE_BIT_0) {
3101 /* 24 Byte Sense Data */
445b5b49
HH		 3102 sprintf(page + len, KERN_ERR PRINTK_HEADER
3103 " 24 Byte: %x MSG %x, "
3104 "%s MSGb to SYSOP\n",
3105 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f,
3106 irb->ecw[1] & 0x10 ? "" : "no");
1da177e4
LT		 3107 } else {
3108 /* 32 Byte Sense Data */
445b5b49
HH		 3109 sprintf(page + len, KERN_ERR PRINTK_HEADER
3110 " 32 Byte: Format: %x "
3111 "Exception class %x\n",
3112 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4);
1da177e4
LT		 3113 }
3114 } else {
445b5b49
HH		 3115 sprintf(page + len, KERN_ERR PRINTK_HEADER
3116 " SORRY - NO VALID SENSE AVAILABLE\n");
1da177e4 3117 }
445b5b49
HH		 3118 printk("%s", page);
3119
8e09f215
SW		 3120 if (req) {
3121 /* req == NULL for unsolicited interrupts */
3122 /* dump the Channel Program (max 140 Bytes per line) */
3123 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */
3124 first = req->cpaddr;
3125 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++);
3126 to = min(first + 6, last);
3127 len = sprintf(page, KERN_ERR PRINTK_HEADER
3128 " Related CP in req: %p\n", req);
3129 dasd_eckd_dump_ccw_range(first, to, page + len);
3130 printk("%s", page);
1da177e4 3131
8e09f215
SW		 3132 /* print failing CCW area (maximum 4) */
3133 /* scsw->cda is either valid or zero */
3134 len = 0;
3135 from = ++to;
23d805b6
PO		 3136 fail = (struct ccw1 *)(addr_t)
3137 irb->scsw.cmd.cpa; /* failing CCW */
8e09f215
SW		 3138 if (from < fail - 2) {
3139 from = fail - 2; /* there is a gap - print header */
3140 len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n");
3141 }
3142 to = min(fail + 1, last);
3143 len += dasd_eckd_dump_ccw_range(from, to, page + len);
3144
3145 /* print last CCWs (maximum 2) */
3146 from = max(from, ++to);
3147 if (from < last - 1) {
3148 from = last - 1; /* there is a gap - print header */
3149 len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n");
3150 }
3151 len += dasd_eckd_dump_ccw_range(from, last, page + len);
3152 if (len > 0)
3153 printk("%s", page);
1da177e4 3154 }
1da177e4
LT		 3155 free_page((unsigned long) page);
3156}
3157
f3eb5384
SW		 3158
3159/*
3160 * Print sense data from a tcw.
3161 */
3162static void dasd_eckd_dump_sense_tcw(struct dasd_device *device,
3163 struct dasd_ccw_req *req, struct irb *irb)
3164{
3165 char *page;
3166 int len, sl, sct, residual;
3167
3168 struct tsb *tsb;
3169 u8 *sense;
3170
3171
3172 page = (char *) get_zeroed_page(GFP_ATOMIC);
3173 if (page == NULL) {
fc19f381 3174 DBF_DEV_EVENT(DBF_WARNING, device, " %s",
f3eb5384
SW		 3175 "No memory to dump sense data");
3176 return;
3177 }
3178 /* dump the sense data */
3179 len = sprintf(page, KERN_ERR PRINTK_HEADER
3180 " I/O status report for device %s:\n",
3181 dev_name(&device->cdev->dev));
3182 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
6cc7f168 3183 " in req: %p CS: 0x%02X DS: 0x%02X CC: 0x%02X RC: %d "
f3eb5384
SW		 3184 "fcxs: 0x%02X schxs: 0x%02X\n", req,
3185 scsw_cstat(&irb->scsw), scsw_dstat(&irb->scsw),
6cc7f168 3186 scsw_cc(&irb->scsw), req->intrc,
f3eb5384
SW		 3187 irb->scsw.tm.fcxs, irb->scsw.tm.schxs);
3188 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3189 " device %s: Failing TCW: %p\n",
3190 dev_name(&device->cdev->dev),
3191 (void *) (addr_t) irb->scsw.tm.tcw);
3192
3193 tsb = NULL;
3194 sense = NULL;
b8fde722 3195 if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs == 0x01))
f3eb5384
SW		 3196 tsb = tcw_get_tsb(
3197 (struct tcw *)(unsigned long)irb->scsw.tm.tcw);
3198
b8fde722 3199 if (tsb) {
f3eb5384
SW		 3200 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3201 " tsb->length %d\n", tsb->length);
3202 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3203 " tsb->flags %x\n", tsb->flags);
3204 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3205 " tsb->dcw_offset %d\n", tsb->dcw_offset);
3206 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3207 " tsb->count %d\n", tsb->count);
3208 residual = tsb->count - 28;
3209 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3210 " residual %d\n", residual);
3211
3212 switch (tsb->flags & 0x07) {
3213 case 1: /* tsa_iostat */
3214 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3215 " tsb->tsa.iostat.dev_time %d\n",
3216 tsb->tsa.iostat.dev_time);
3217 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3218 " tsb->tsa.iostat.def_time %d\n",
3219 tsb->tsa.iostat.def_time);
3220 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3221 " tsb->tsa.iostat.queue_time %d\n",
3222 tsb->tsa.iostat.queue_time);
3223 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3224 " tsb->tsa.iostat.dev_busy_time %d\n",
3225 tsb->tsa.iostat.dev_busy_time);
3226 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3227 " tsb->tsa.iostat.dev_act_time %d\n",
3228 tsb->tsa.iostat.dev_act_time);
3229 sense = tsb->tsa.iostat.sense;
3230 break;
3231 case 2: /* ts_ddpc */
3232 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3233 " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc);
3234 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3235 " tsb->tsa.ddpc.rcq: ");
3236 for (sl = 0; sl < 16; sl++) {
3237 for (sct = 0; sct < 8; sct++) {
3238 len += sprintf(page + len, " %02x",
3239 tsb->tsa.ddpc.rcq[sl]);
3240 }
3241 len += sprintf(page + len, "\n");
3242 }
3243 sense = tsb->tsa.ddpc.sense;
3244 break;
3245 case 3: /* tsa_intrg */
3246 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3247 " tsb->tsa.intrg.: not supportet yet \n");
3248 break;
3249 }
3250
3251 if (sense) {
3252 for (sl = 0; sl < 4; sl++) {
3253 len += sprintf(page + len,
3254 KERN_ERR PRINTK_HEADER
3255 " Sense(hex) %2d-%2d:",
3256 (8 * sl), ((8 * sl) + 7));
3257 for (sct = 0; sct < 8; sct++) {
3258 len += sprintf(page + len, " %02x",
3259 sense[8 * sl + sct]);
3260 }
3261 len += sprintf(page + len, "\n");
3262 }
3263
3264 if (sense[27] & DASD_SENSE_BIT_0) {
3265 /* 24 Byte Sense Data */
3266 sprintf(page + len, KERN_ERR PRINTK_HEADER
3267 " 24 Byte: %x MSG %x, "
3268 "%s MSGb to SYSOP\n",
3269 sense[7] >> 4, sense[7] & 0x0f,
3270 sense[1] & 0x10 ? "" : "no");
3271 } else {
3272 /* 32 Byte Sense Data */
3273 sprintf(page + len, KERN_ERR PRINTK_HEADER
3274 " 32 Byte: Format: %x "
3275 "Exception class %x\n",
3276 sense[6] & 0x0f, sense[22] >> 4);
3277 }
3278 } else {
3279 sprintf(page + len, KERN_ERR PRINTK_HEADER
3280 " SORRY - NO VALID SENSE AVAILABLE\n");
3281 }
3282 } else {
3283 sprintf(page + len, KERN_ERR PRINTK_HEADER
3284 " SORRY - NO TSB DATA AVAILABLE\n");
3285 }
3286 printk("%s", page);
3287 free_page((unsigned long) page);
3288}
3289
3290static void dasd_eckd_dump_sense(struct dasd_device *device,
3291 struct dasd_ccw_req *req, struct irb *irb)
3292{
3293 if (req && scsw_is_tm(&req->irb.scsw))
3294 dasd_eckd_dump_sense_tcw(device, req, irb);
3295 else
3296 dasd_eckd_dump_sense_ccw(device, req, irb);
3297}
3298
501183f2 3299static int dasd_eckd_pm_freeze(struct dasd_device *device)
d41dd122
SH		 3300{
3301 /*
3302 * the device should be disconnected from our LCU structure
3303 * on restore we will reconnect it and reread LCU specific
3304 * information like PAV support that might have changed
3305 */
3306 dasd_alias_remove_device(device);
3307 dasd_alias_disconnect_device_from_lcu(device);
3308
3309 return 0;
3310}
3311
501183f2 3312static int dasd_eckd_restore_device(struct dasd_device *device)
d41dd122
SH		 3313{
3314 struct dasd_eckd_private *private;
6fca97a9 3315 struct dasd_eckd_characteristics temp_rdc_data;
d41dd122
SH		 3316 int is_known, rc;
3317 struct dasd_uid temp_uid;
a7602f6c 3318 unsigned long flags;
d41dd122 3319
d41dd122
SH		 3320 private = (struct dasd_eckd_private *) device->private;
3321
3322 /* Read Configuration Data */
3323 rc = dasd_eckd_read_conf(device);
3324 if (rc)
3325 goto out_err;
3326
2dedf0d9
SH		 3327 dasd_eckd_get_uid(device, &temp_uid);
3328 /* Generate device unique id */
3329 rc = dasd_eckd_generate_uid(device);
3330 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
d41dd122 3331 if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0)
a7602f6c
SH		 3332 dev_err(&device->cdev->dev, "The UID of the DASD has "
3333 "changed\n");
2dedf0d9 3334 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
d41dd122
SH		 3335 if (rc)
3336 goto out_err;
d41dd122
SH		 3337
3338 /* register lcu with alias handling, enable PAV if this is a new lcu */
3339 is_known = dasd_alias_make_device_known_to_lcu(device);
3340 if (is_known < 0)
3341 return is_known;
3342 if (!is_known) {
f4ac1d02
SW		 3343 dasd_eckd_validate_server(device);
3344 dasd_alias_lcu_setup_complete(device);
3345 } else
3346 dasd_alias_wait_for_lcu_setup(device);
3347
3348 /* RE-Read Configuration Data */
3349 rc = dasd_eckd_read_conf(device);
3350 if (rc)
3351 goto out_err;
d41dd122
SH		 3352
3353 /* Read Feature Codes */
68d1e5f0 3354 dasd_eckd_read_features(device);
d41dd122
SH		 3355
3356 /* Read Device Characteristics */
68b781fe 3357 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
6fca97a9 3358 &temp_rdc_data, 64);
d41dd122 3359 if (rc) {
b8ed5dd5
SH		 3360 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
3361 "Read device characteristic failed, rc=%d", rc);
d41dd122
SH		 3362 goto out_err;
3363 }
a7602f6c 3364 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
6fca97a9 3365 memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data));
a7602f6c 3366 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
d41dd122
SH		 3367
3368 /* add device to alias management */
3369 dasd_alias_add_device(device);
3370
3371 return 0;
3372
3373out_err:
e6125fba 3374 return -1;
d41dd122
SH		 3375}
3376
501183f2
SH		 3377static int dasd_eckd_reload_device(struct dasd_device *device)
3378{
3379 struct dasd_eckd_private *private;
3380 int rc, old_base;
2dedf0d9
SH		 3381 char print_uid[60];
3382 struct dasd_uid uid;
3383 unsigned long flags;
501183f2
SH		 3384
3385 private = (struct dasd_eckd_private *) device->private;
2dedf0d9
SH		 3386
3387 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
501183f2 3388 old_base = private->uid.base_unit_addr;
2dedf0d9
SH		 3389 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
3390
501183f2
SH		 3391 /* Read Configuration Data */
3392 rc = dasd_eckd_read_conf(device);
3393 if (rc)
3394 goto out_err;
3395
2dedf0d9 3396 rc = dasd_eckd_generate_uid(device);
501183f2
SH		 3397 if (rc)
3398 goto out_err;
501183f2
SH		 3399 /*
3400 * update unit address configuration and
3401 * add device to alias management
3402 */
3403 dasd_alias_update_add_device(device);
3404
2dedf0d9
SH		 3405 dasd_eckd_get_uid(device, &uid);
3406
3407 if (old_base != uid.base_unit_addr) {
3408 if (strlen(uid.vduit) > 0)
3409 snprintf(print_uid, sizeof(print_uid),
3410 "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial,
3411 uid.ssid, uid.base_unit_addr, uid.vduit);
501183f2 3412 else
2dedf0d9
SH		 3413 snprintf(print_uid, sizeof(print_uid),
3414 "%s.%s.%04x.%02x", uid.vendor, uid.serial,
3415 uid.ssid, uid.base_unit_addr);
501183f2
SH		 3416
3417 dev_info(&device->cdev->dev,
3418 "An Alias device was reassigned to a new base device "
2dedf0d9 3419 "with UID: %s\n", print_uid);
501183f2
SH		 3420 }
3421 return 0;
3422
3423out_err:
3424 return -1;
3425}
3426
d41dd122
SH		 3427static struct ccw_driver dasd_eckd_driver = {
3428 .name = "dasd-eckd",
3429 .owner = THIS_MODULE,
3430 .ids = dasd_eckd_ids,
3431 .probe = dasd_eckd_probe,
3432 .remove = dasd_generic_remove,
3433 .set_offline = dasd_generic_set_offline,
3434 .set_online = dasd_eckd_set_online,
3435 .notify = dasd_generic_notify,
3436 .freeze = dasd_generic_pm_freeze,
3437 .thaw = dasd_generic_restore_device,
3438 .restore = dasd_generic_restore_device,
a23ed009 3439 .uc_handler = dasd_generic_uc_handler,
d41dd122 3440};
f3eb5384 3441
1da177e4
LT		 3442/*
3443 * max_blocks is dependent on the amount of storage that is available
3444 * in the static io buffer for each device. Currently each device has
3445 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has
3446 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use
3447 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In
3448 * addition we have one define extent ccw + 16 bytes of data and one
3449 * locate record ccw + 16 bytes of data. That makes:
3450 * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum.
3451 * We want to fit two into the available memory so that we can immediately
3452 * start the next request if one finishes off. That makes 249.5 blocks
3453 * for one request. Give a little safety and the result is 240.
3454 */
3455static struct dasd_discipline dasd_eckd_discipline = {
3456 .owner = THIS_MODULE,
3457 .name = "ECKD",
3458 .ebcname = "ECKD",
3459 .max_blocks = 240,
3460 .check_device = dasd_eckd_check_characteristics,
8e09f215 3461 .uncheck_device = dasd_eckd_uncheck_device,
1da177e4 3462 .do_analysis = dasd_eckd_do_analysis,
8e09f215
SW		 3463 .ready_to_online = dasd_eckd_ready_to_online,
3464 .online_to_ready = dasd_eckd_online_to_ready,
1da177e4
LT		 3465 .fill_geometry = dasd_eckd_fill_geometry,
3466 .start_IO = dasd_start_IO,
3467 .term_IO = dasd_term_IO,
8e09f215 3468 .handle_terminated_request = dasd_eckd_handle_terminated_request,
1da177e4 3469 .format_device = dasd_eckd_format_device,
1da177e4
LT		 3470 .erp_action = dasd_eckd_erp_action,
3471 .erp_postaction = dasd_eckd_erp_postaction,
8e09f215
SW		 3472 .handle_unsolicited_interrupt = dasd_eckd_handle_unsolicited_interrupt,
3473 .build_cp = dasd_eckd_build_alias_cp,
3474 .free_cp = dasd_eckd_free_alias_cp,
1da177e4 3475 .dump_sense = dasd_eckd_dump_sense,
fc19f381 3476 .dump_sense_dbf = dasd_eckd_dump_sense_dbf,
1da177e4 3477 .fill_info = dasd_eckd_fill_info,
1107ccfb 3478 .ioctl = dasd_eckd_ioctl,
d41dd122
SH		 3479 .freeze = dasd_eckd_pm_freeze,
3480 .restore = dasd_eckd_restore_device,
501183f2 3481 .reload = dasd_eckd_reload_device,
2dedf0d9 3482 .get_uid = dasd_eckd_get_uid,
1da177e4
LT		 3483};
3484
3485static int __init
3486dasd_eckd_init(void)
3487{
736e6ea0
SO		 3488 int ret;
3489
1da177e4 3490 ASCEBC(dasd_eckd_discipline.ebcname, 4);
736e6ea0
SO		 3491 ret = ccw_driver_register(&dasd_eckd_driver);
3492 if (!ret)
3493 wait_for_device_probe();
3494
3495 return ret;
1da177e4
LT		 3496}
3497
3498static void __exit
3499dasd_eckd_cleanup(void)
3500{
3501 ccw_driver_unregister(&dasd_eckd_driver);
1da177e4
LT		 3502}
3503
3504module_init(dasd_eckd_init);
3505module_exit(dasd_eckd_cleanup);
Linux 6.x block layer and io_uring tree(s)