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[S390] dcssblk: revert devt conversion
[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>
8 * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000
ab1d848f
NH		 9 * EMC Symmetrix ioctl Copyright EMC Corporation, 2008
10 * Author.........: Nigel Hislop <hislop_nigel@emc.com>
1da177e4 11 *
1da177e4
LT		 12 */
13
fc19f381
SH		 14#define KMSG_COMPONENT "dasd"
15
1da177e4
LT		 16#include <linux/stddef.h>
17#include <linux/kernel.h>
18#include <linux/slab.h>
19#include <linux/hdreg.h> /* HDIO_GETGEO */
20#include <linux/bio.h>
21#include <linux/module.h>
22#include <linux/init.h>
23
24#include <asm/debug.h>
25#include <asm/idals.h>
26#include <asm/ebcdic.h>
27#include <asm/io.h>
28#include <asm/todclk.h>
29#include <asm/uaccess.h>
40545573 30#include <asm/cio.h>
1da177e4 31#include <asm/ccwdev.h>
f3eb5384 32#include <asm/itcw.h>
1da177e4
LT		 33
34#include "dasd_int.h"
35#include "dasd_eckd.h"
f3eb5384
SW		 36#include "../cio/chsc.h"
37
1da177e4
LT		 38
39#ifdef PRINTK_HEADER
40#undef PRINTK_HEADER
41#endif /* PRINTK_HEADER */
42#define PRINTK_HEADER "dasd(eckd):"
43
44#define ECKD_C0(i) (i->home_bytes)
45#define ECKD_F(i) (i->formula)
46#define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\
47 (i->factors.f_0x02.f1))
48#define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\
49 (i->factors.f_0x02.f2))
50#define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\
51 (i->factors.f_0x02.f3))
52#define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0)
53#define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0)
54#define ECKD_F6(i) (i->factor6)
55#define ECKD_F7(i) (i->factor7)
56#define ECKD_F8(i) (i->factor8)
57
58MODULE_LICENSE("GPL");
59
60static struct dasd_discipline dasd_eckd_discipline;
61
1da177e4
LT		 62/* The ccw bus type uses this table to find devices that it sends to
63 * dasd_eckd_probe */
64static struct ccw_device_id dasd_eckd_ids[] = {
d2c993d8
HC		 65 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1},
66 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2},
67 { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3390, 0), .driver_info = 0x3},
68 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4},
69 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5},
70 { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6},
71 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7},
72 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8},
73 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9},
74 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa},
1da177e4
LT		 75 { /* end of list */ },
76};
77
78MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids);
79
80static struct ccw_driver dasd_eckd_driver; /* see below */
81
82/* initial attempt at a probe function. this can be simplified once
83 * the other detection code is gone */
84static int
85dasd_eckd_probe (struct ccw_device *cdev)
86{
87 int ret;
88
40545573
HH		 89 /* set ECKD specific ccw-device options */
90 ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE);
91 if (ret) {
fc19f381 92 DBF_EVENT(DBF_WARNING,
40545573 93 "dasd_eckd_probe: could not set ccw-device options "
2a0217d5 94 "for %s\n", dev_name(&cdev->dev));
1da177e4 95 return ret;
40545573
HH		 96 }
97 ret = dasd_generic_probe(cdev, &dasd_eckd_discipline);
98 return ret;
1da177e4
LT		 99}
100
101static int
102dasd_eckd_set_online(struct ccw_device *cdev)
103{
40545573 104 return dasd_generic_set_online(cdev, &dasd_eckd_discipline);
1da177e4
LT		 105}
106
107static struct ccw_driver dasd_eckd_driver = {
108 .name = "dasd-eckd",
109 .owner = THIS_MODULE,
110 .ids = dasd_eckd_ids,
111 .probe = dasd_eckd_probe,
112 .remove = dasd_generic_remove,
113 .set_offline = dasd_generic_set_offline,
114 .set_online = dasd_eckd_set_online,
115 .notify = dasd_generic_notify,
116};
117
118static const int sizes_trk0[] = { 28, 148, 84 };
119#define LABEL_SIZE 140
120
121static inline unsigned int
122round_up_multiple(unsigned int no, unsigned int mult)
123{
124 int rem = no % mult;
125 return (rem ? no - rem + mult : no);
126}
127
128static inline unsigned int
129ceil_quot(unsigned int d1, unsigned int d2)
130{
131 return (d1 + (d2 - 1)) / d2;
132}
133
4d284cac 134static unsigned int
1da177e4
LT		 135recs_per_track(struct dasd_eckd_characteristics * rdc,
136 unsigned int kl, unsigned int dl)
137{
138 int dn, kn;
139
140 switch (rdc->dev_type) {
141 case 0x3380:
142 if (kl)
143 return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) +
144 ceil_quot(dl + 12, 32));
145 else
146 return 1499 / (15 + ceil_quot(dl + 12, 32));
147 case 0x3390:
148 dn = ceil_quot(dl + 6, 232) + 1;
149 if (kl) {
150 kn = ceil_quot(kl + 6, 232) + 1;
151 return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) +
152 9 + ceil_quot(dl + 6 * dn, 34));
153 } else
154 return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34));
155 case 0x9345:
156 dn = ceil_quot(dl + 6, 232) + 1;
157 if (kl) {
158 kn = ceil_quot(kl + 6, 232) + 1;
159 return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) +
160 ceil_quot(dl + 6 * dn, 34));
161 } else
162 return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34));
163 }
164 return 0;
165}
166
b44b0ab3
SW		 167static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head)
168{
169 geo->cyl = (__u16) cyl;
170 geo->head = cyl >> 16;
171 geo->head <<= 4;
172 geo->head |= head;
173}
174
4d284cac 175static int
1da177e4
LT		 176check_XRC (struct ccw1 *de_ccw,
177 struct DE_eckd_data *data,
178 struct dasd_device *device)
179{
180 struct dasd_eckd_private *private;
d54853ef 181 int rc;
1da177e4
LT		 182
183 private = (struct dasd_eckd_private *) device->private;
d54853ef
MS		 184 if (!private->rdc_data.facilities.XRC_supported)
185 return 0;
1da177e4
LT		 186
187 /* switch on System Time Stamp - needed for XRC Support */
d54853ef
MS		 188 data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */
189 data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */
1da177e4 190
d54853ef
MS		 191 rc = get_sync_clock(&data->ep_sys_time);
192 /* Ignore return code if sync clock is switched off. */
193 if (rc == -ENOSYS || rc == -EACCES)
194 rc = 0;
1da177e4 195
8e09f215 196 de_ccw->count = sizeof(struct DE_eckd_data);
d54853ef
MS		 197 de_ccw->flags |= CCW_FLAG_SLI;
198 return rc;
199}
1da177e4 200
4d284cac 201static int
b44b0ab3
SW		 202define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk,
203 unsigned int totrk, int cmd, struct dasd_device *device)
1da177e4
LT		 204{
205 struct dasd_eckd_private *private;
b44b0ab3
SW		 206 u32 begcyl, endcyl;
207 u16 heads, beghead, endhead;
d54853ef 208 int rc = 0;
1da177e4
LT		 209
210 private = (struct dasd_eckd_private *) device->private;
211
212 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT;
213 ccw->flags = 0;
214 ccw->count = 16;
215 ccw->cda = (__u32) __pa(data);
216
8e09f215 217 memset(data, 0, sizeof(struct DE_eckd_data));
1da177e4
LT		 218 switch (cmd) {
219 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
220 case DASD_ECKD_CCW_READ_RECORD_ZERO:
221 case DASD_ECKD_CCW_READ:
222 case DASD_ECKD_CCW_READ_MT:
223 case DASD_ECKD_CCW_READ_CKD:
224 case DASD_ECKD_CCW_READ_CKD_MT:
225 case DASD_ECKD_CCW_READ_KD:
226 case DASD_ECKD_CCW_READ_KD_MT:
227 case DASD_ECKD_CCW_READ_COUNT:
228 data->mask.perm = 0x1;
229 data->attributes.operation = private->attrib.operation;
230 break;
231 case DASD_ECKD_CCW_WRITE:
232 case DASD_ECKD_CCW_WRITE_MT:
233 case DASD_ECKD_CCW_WRITE_KD:
234 case DASD_ECKD_CCW_WRITE_KD_MT:
235 data->mask.perm = 0x02;
236 data->attributes.operation = private->attrib.operation;
d54853ef 237 rc = check_XRC (ccw, data, device);
1da177e4
LT		 238 break;
239 case DASD_ECKD_CCW_WRITE_CKD:
240 case DASD_ECKD_CCW_WRITE_CKD_MT:
241 data->attributes.operation = DASD_BYPASS_CACHE;
d54853ef 242 rc = check_XRC (ccw, data, device);
1da177e4
LT		 243 break;
244 case DASD_ECKD_CCW_ERASE:
245 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
246 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
247 data->mask.perm = 0x3;
248 data->mask.auth = 0x1;
249 data->attributes.operation = DASD_BYPASS_CACHE;
d54853ef 250 rc = check_XRC (ccw, data, device);
1da177e4
LT		 251 break;
252 default:
fc19f381
SH		 253 dev_err(&device->cdev->dev,
254 "0x%x is not a known command\n", cmd);
1da177e4
LT		 255 break;
256 }
257
258 data->attributes.mode = 0x3; /* ECKD */
259
260 if ((private->rdc_data.cu_type == 0x2105 ||
261 private->rdc_data.cu_type == 0x2107 ||
262 private->rdc_data.cu_type == 0x1750)
263 && !(private->uses_cdl && trk < 2))
264 data->ga_extended |= 0x40; /* Regular Data Format Mode */
265
b44b0ab3
SW		 266 heads = private->rdc_data.trk_per_cyl;
267 begcyl = trk / heads;
268 beghead = trk % heads;
269 endcyl = totrk / heads;
270 endhead = totrk % heads;
1da177e4
LT		 271
272 /* check for sequential prestage - enhance cylinder range */
273 if (data->attributes.operation == DASD_SEQ_PRESTAGE ||
274 data->attributes.operation == DASD_SEQ_ACCESS) {
138c014d 275
b44b0ab3
SW		 276 if (endcyl + private->attrib.nr_cyl < private->real_cyl)
277 endcyl += private->attrib.nr_cyl;
1da177e4 278 else
b44b0ab3 279 endcyl = (private->real_cyl - 1);
1da177e4
LT		 280 }
281
b44b0ab3
SW		 282 set_ch_t(&data->beg_ext, begcyl, beghead);
283 set_ch_t(&data->end_ext, endcyl, endhead);
d54853ef 284 return rc;
1da177e4
LT		 285}
286
8e09f215
SW		 287static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata,
288 struct dasd_device *device)
289{
290 struct dasd_eckd_private *private;
291 int rc;
292
293 private = (struct dasd_eckd_private *) device->private;
294 if (!private->rdc_data.facilities.XRC_supported)
295 return 0;
296
297 /* switch on System Time Stamp - needed for XRC Support */
f3eb5384
SW		 298 pfxdata->define_extent.ga_extended |= 0x08; /* 'Time Stamp Valid' */
299 pfxdata->define_extent.ga_extended |= 0x02; /* 'Extended Parameter' */
8e09f215
SW		 300 pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */
301
f3eb5384 302 rc = get_sync_clock(&pfxdata->define_extent.ep_sys_time);
8e09f215
SW		 303 /* Ignore return code if sync clock is switched off. */
304 if (rc == -ENOSYS || rc == -EACCES)
305 rc = 0;
306 return rc;
307}
308
f3eb5384
SW		 309static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk,
310 unsigned int rec_on_trk, int count, int cmd,
311 struct dasd_device *device, unsigned int reclen,
312 unsigned int tlf)
313{
314 struct dasd_eckd_private *private;
315 int sector;
316 int dn, d;
317
318 private = (struct dasd_eckd_private *) device->private;
319
320 memset(data, 0, sizeof(*data));
321 sector = 0;
322 if (rec_on_trk) {
323 switch (private->rdc_data.dev_type) {
324 case 0x3390:
325 dn = ceil_quot(reclen + 6, 232);
326 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
327 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
328 break;
329 case 0x3380:
330 d = 7 + ceil_quot(reclen + 12, 32);
331 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
332 break;
333 }
334 }
335 data->sector = sector;
336 /* note: meaning of count depends on the operation
337 * for record based I/O it's the number of records, but for
338 * track based I/O it's the number of tracks
339 */
340 data->count = count;
341 switch (cmd) {
342 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
343 data->operation.orientation = 0x3;
344 data->operation.operation = 0x03;
345 break;
346 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
347 data->operation.orientation = 0x3;
348 data->operation.operation = 0x16;
349 break;
350 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
351 data->operation.orientation = 0x1;
352 data->operation.operation = 0x03;
353 data->count++;
354 break;
355 case DASD_ECKD_CCW_READ_RECORD_ZERO:
356 data->operation.orientation = 0x3;
357 data->operation.operation = 0x16;
358 data->count++;
359 break;
360 case DASD_ECKD_CCW_WRITE:
361 case DASD_ECKD_CCW_WRITE_MT:
362 case DASD_ECKD_CCW_WRITE_KD:
363 case DASD_ECKD_CCW_WRITE_KD_MT:
364 data->auxiliary.length_valid = 0x1;
365 data->length = reclen;
366 data->operation.operation = 0x01;
367 break;
368 case DASD_ECKD_CCW_WRITE_CKD:
369 case DASD_ECKD_CCW_WRITE_CKD_MT:
370 data->auxiliary.length_valid = 0x1;
371 data->length = reclen;
372 data->operation.operation = 0x03;
373 break;
374 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
375 data->auxiliary.length_valid = 0x1;
376 data->length = reclen; /* not tlf, as one might think */
377 data->operation.operation = 0x3F;
378 data->extended_operation = 0x23;
379 break;
380 case DASD_ECKD_CCW_READ:
381 case DASD_ECKD_CCW_READ_MT:
382 case DASD_ECKD_CCW_READ_KD:
383 case DASD_ECKD_CCW_READ_KD_MT:
384 data->auxiliary.length_valid = 0x1;
385 data->length = reclen;
386 data->operation.operation = 0x06;
387 break;
388 case DASD_ECKD_CCW_READ_CKD:
389 case DASD_ECKD_CCW_READ_CKD_MT:
390 data->auxiliary.length_valid = 0x1;
391 data->length = reclen;
392 data->operation.operation = 0x16;
393 break;
394 case DASD_ECKD_CCW_READ_COUNT:
395 data->operation.operation = 0x06;
396 break;
397 case DASD_ECKD_CCW_READ_TRACK_DATA:
398 data->auxiliary.length_valid = 0x1;
399 data->length = tlf;
400 data->operation.operation = 0x0C;
401 break;
402 case DASD_ECKD_CCW_ERASE:
403 data->length = reclen;
404 data->auxiliary.length_valid = 0x1;
405 data->operation.operation = 0x0b;
406 break;
407 default:
408 DBF_DEV_EVENT(DBF_ERR, device,
409 "fill LRE unknown opcode 0x%x", cmd);
410 BUG();
411 }
412 set_ch_t(&data->seek_addr,
413 trk / private->rdc_data.trk_per_cyl,
414 trk % private->rdc_data.trk_per_cyl);
415 data->search_arg.cyl = data->seek_addr.cyl;
416 data->search_arg.head = data->seek_addr.head;
417 data->search_arg.record = rec_on_trk;
418}
419
420static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
421 unsigned int trk, unsigned int totrk, int cmd,
422 struct dasd_device *basedev, struct dasd_device *startdev,
423 unsigned char format, unsigned int rec_on_trk, int count,
424 unsigned int blksize, unsigned int tlf)
8e09f215
SW		 425{
426 struct dasd_eckd_private *basepriv, *startpriv;
f3eb5384
SW		 427 struct DE_eckd_data *dedata;
428 struct LRE_eckd_data *lredata;
b44b0ab3
SW		 429 u32 begcyl, endcyl;
430 u16 heads, beghead, endhead;
8e09f215
SW		 431 int rc = 0;
432
433 basepriv = (struct dasd_eckd_private *) basedev->private;
434 startpriv = (struct dasd_eckd_private *) startdev->private;
f3eb5384
SW		 435 dedata = &pfxdata->define_extent;
436 lredata = &pfxdata->locate_record;
8e09f215
SW		 437
438 ccw->cmd_code = DASD_ECKD_CCW_PFX;
439 ccw->flags = 0;
440 ccw->count = sizeof(*pfxdata);
441 ccw->cda = (__u32) __pa(pfxdata);
442
443 memset(pfxdata, 0, sizeof(*pfxdata));
444 /* prefix data */
f3eb5384
SW		 445 if (format > 1) {
446 DBF_DEV_EVENT(DBF_ERR, basedev,
447 "PFX LRE unknown format 0x%x", format);
448 BUG();
449 return -EINVAL;
450 }
451 pfxdata->format = format;
4abb08c2
SW		 452 pfxdata->base_address = basepriv->ned->unit_addr;
453 pfxdata->base_lss = basepriv->ned->ID;
f3eb5384 454 pfxdata->validity.define_extent = 1;
8e09f215
SW		 455
456 /* private uid is kept up to date, conf_data may be outdated */
457 if (startpriv->uid.type != UA_BASE_DEVICE) {
458 pfxdata->validity.verify_base = 1;
459 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS)
460 pfxdata->validity.hyper_pav = 1;
461 }
462
463 /* define extend data (mostly)*/
464 switch (cmd) {
465 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
466 case DASD_ECKD_CCW_READ_RECORD_ZERO:
467 case DASD_ECKD_CCW_READ:
468 case DASD_ECKD_CCW_READ_MT:
469 case DASD_ECKD_CCW_READ_CKD:
470 case DASD_ECKD_CCW_READ_CKD_MT:
471 case DASD_ECKD_CCW_READ_KD:
472 case DASD_ECKD_CCW_READ_KD_MT:
473 case DASD_ECKD_CCW_READ_COUNT:
f3eb5384
SW		 474 dedata->mask.perm = 0x1;
475 dedata->attributes.operation = basepriv->attrib.operation;
476 break;
477 case DASD_ECKD_CCW_READ_TRACK_DATA:
478 dedata->mask.perm = 0x1;
479 dedata->attributes.operation = basepriv->attrib.operation;
480 dedata->blk_size = 0;
8e09f215
SW		 481 break;
482 case DASD_ECKD_CCW_WRITE:
483 case DASD_ECKD_CCW_WRITE_MT:
484 case DASD_ECKD_CCW_WRITE_KD:
485 case DASD_ECKD_CCW_WRITE_KD_MT:
f3eb5384
SW		 486 dedata->mask.perm = 0x02;
487 dedata->attributes.operation = basepriv->attrib.operation;
8e09f215
SW		 488 rc = check_XRC_on_prefix(pfxdata, basedev);
489 break;
490 case DASD_ECKD_CCW_WRITE_CKD:
491 case DASD_ECKD_CCW_WRITE_CKD_MT:
f3eb5384 492 dedata->attributes.operation = DASD_BYPASS_CACHE;
8e09f215
SW		 493 rc = check_XRC_on_prefix(pfxdata, basedev);
494 break;
495 case DASD_ECKD_CCW_ERASE:
496 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
497 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
f3eb5384
SW		 498 dedata->mask.perm = 0x3;
499 dedata->mask.auth = 0x1;
500 dedata->attributes.operation = DASD_BYPASS_CACHE;
8e09f215
SW		 501 rc = check_XRC_on_prefix(pfxdata, basedev);
502 break;
f3eb5384
SW		 503 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
504 dedata->mask.perm = 0x02;
505 dedata->attributes.operation = basepriv->attrib.operation;
506 dedata->blk_size = blksize;
507 rc = check_XRC_on_prefix(pfxdata, basedev);
8e09f215 508 break;
f3eb5384
SW		 509 default:
510 DBF_DEV_EVENT(DBF_ERR, basedev,
511 "PFX LRE unknown opcode 0x%x", cmd);
512 BUG();
513 return -EINVAL;
8e09f215
SW		 514 }
515
f3eb5384 516 dedata->attributes.mode = 0x3; /* ECKD */
8e09f215
SW		 517
518 if ((basepriv->rdc_data.cu_type == 0x2105 ||
519 basepriv->rdc_data.cu_type == 0x2107 ||
520 basepriv->rdc_data.cu_type == 0x1750)
521 && !(basepriv->uses_cdl && trk < 2))
f3eb5384 522 dedata->ga_extended |= 0x40; /* Regular Data Format Mode */
8e09f215 523
b44b0ab3
SW		 524 heads = basepriv->rdc_data.trk_per_cyl;
525 begcyl = trk / heads;
526 beghead = trk % heads;
527 endcyl = totrk / heads;
528 endhead = totrk % heads;
8e09f215
SW		 529
530 /* check for sequential prestage - enhance cylinder range */
f3eb5384
SW		 531 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE ||
532 dedata->attributes.operation == DASD_SEQ_ACCESS) {
8e09f215 533
b44b0ab3
SW		 534 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl)
535 endcyl += basepriv->attrib.nr_cyl;
8e09f215 536 else
b44b0ab3 537 endcyl = (basepriv->real_cyl - 1);
8e09f215
SW		 538 }
539
f3eb5384
SW		 540 set_ch_t(&dedata->beg_ext, begcyl, beghead);
541 set_ch_t(&dedata->end_ext, endcyl, endhead);
542
543 if (format == 1) {
544 fill_LRE_data(lredata, trk, rec_on_trk, count, cmd,
545 basedev, blksize, tlf);
546 }
547
8e09f215
SW		 548 return rc;
549}
550
f3eb5384
SW		 551static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
552 unsigned int trk, unsigned int totrk, int cmd,
553 struct dasd_device *basedev, struct dasd_device *startdev)
554{
555 return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev,
556 0, 0, 0, 0, 0);
557}
558
4d284cac 559static void
b44b0ab3
SW		 560locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk,
561 unsigned int rec_on_trk, int no_rec, int cmd,
1da177e4
LT		 562 struct dasd_device * device, int reclen)
563{
564 struct dasd_eckd_private *private;
565 int sector;
566 int dn, d;
138c014d 567
1da177e4
LT		 568 private = (struct dasd_eckd_private *) device->private;
569
570 DBF_DEV_EVENT(DBF_INFO, device,
571 "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d",
572 trk, rec_on_trk, no_rec, cmd, reclen);
573
574 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD;
575 ccw->flags = 0;
576 ccw->count = 16;
577 ccw->cda = (__u32) __pa(data);
578
8e09f215 579 memset(data, 0, sizeof(struct LO_eckd_data));
1da177e4
LT		 580 sector = 0;
581 if (rec_on_trk) {
582 switch (private->rdc_data.dev_type) {
583 case 0x3390:
584 dn = ceil_quot(reclen + 6, 232);
585 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
586 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
587 break;
588 case 0x3380:
589 d = 7 + ceil_quot(reclen + 12, 32);
590 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
591 break;
592 }
593 }
594 data->sector = sector;
595 data->count = no_rec;
596 switch (cmd) {
597 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
598 data->operation.orientation = 0x3;
599 data->operation.operation = 0x03;
600 break;
601 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
602 data->operation.orientation = 0x3;
603 data->operation.operation = 0x16;
604 break;
605 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
606 data->operation.orientation = 0x1;
607 data->operation.operation = 0x03;
608 data->count++;
609 break;
610 case DASD_ECKD_CCW_READ_RECORD_ZERO:
611 data->operation.orientation = 0x3;
612 data->operation.operation = 0x16;
613 data->count++;
614 break;
615 case DASD_ECKD_CCW_WRITE:
616 case DASD_ECKD_CCW_WRITE_MT:
617 case DASD_ECKD_CCW_WRITE_KD:
618 case DASD_ECKD_CCW_WRITE_KD_MT:
619 data->auxiliary.last_bytes_used = 0x1;
620 data->length = reclen;
621 data->operation.operation = 0x01;
622 break;
623 case DASD_ECKD_CCW_WRITE_CKD:
624 case DASD_ECKD_CCW_WRITE_CKD_MT:
625 data->auxiliary.last_bytes_used = 0x1;
626 data->length = reclen;
627 data->operation.operation = 0x03;
628 break;
629 case DASD_ECKD_CCW_READ:
630 case DASD_ECKD_CCW_READ_MT:
631 case DASD_ECKD_CCW_READ_KD:
632 case DASD_ECKD_CCW_READ_KD_MT:
633 data->auxiliary.last_bytes_used = 0x1;
634 data->length = reclen;
635 data->operation.operation = 0x06;
636 break;
637 case DASD_ECKD_CCW_READ_CKD:
638 case DASD_ECKD_CCW_READ_CKD_MT:
639 data->auxiliary.last_bytes_used = 0x1;
640 data->length = reclen;
641 data->operation.operation = 0x16;
642 break;
643 case DASD_ECKD_CCW_READ_COUNT:
644 data->operation.operation = 0x06;
645 break;
646 case DASD_ECKD_CCW_ERASE:
647 data->length = reclen;
648 data->auxiliary.last_bytes_used = 0x1;
649 data->operation.operation = 0x0b;
650 break;
651 default:
fc19f381
SH		 652 DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record "
653 "opcode 0x%x", cmd);
1da177e4 654 }
b44b0ab3
SW		 655 set_ch_t(&data->seek_addr,
656 trk / private->rdc_data.trk_per_cyl,
657 trk % private->rdc_data.trk_per_cyl);
658 data->search_arg.cyl = data->seek_addr.cyl;
659 data->search_arg.head = data->seek_addr.head;
1da177e4
LT		 660 data->search_arg.record = rec_on_trk;
661}
662
663/*
664 * Returns 1 if the block is one of the special blocks that needs
665 * to get read/written with the KD variant of the command.
666 * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and
667 * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT.
668 * Luckily the KD variants differ only by one bit (0x08) from the
669 * normal variant. So don't wonder about code like:
670 * if (dasd_eckd_cdl_special(blk_per_trk, recid))
671 * ccw->cmd_code |= 0x8;
672 */
673static inline int
674dasd_eckd_cdl_special(int blk_per_trk, int recid)
675{
676 if (recid < 3)
677 return 1;
678 if (recid < blk_per_trk)
679 return 0;
680 if (recid < 2 * blk_per_trk)
681 return 1;
682 return 0;
683}
684
685/*
686 * Returns the record size for the special blocks of the cdl format.
687 * Only returns something useful if dasd_eckd_cdl_special is true
688 * for the recid.
689 */
690static inline int
691dasd_eckd_cdl_reclen(int recid)
692{
693 if (recid < 3)
694 return sizes_trk0[recid];
695 return LABEL_SIZE;
696}
697
3d052595
HH		 698/*
699 * Generate device unique id that specifies the physical device.
700 */
4abb08c2
SW		 701static int dasd_eckd_generate_uid(struct dasd_device *device,
702 struct dasd_uid *uid)
3d052595
HH		 703{
704 struct dasd_eckd_private *private;
4abb08c2 705 int count;
3d052595
HH		 706
707 private = (struct dasd_eckd_private *) device->private;
708 if (!private)
709 return -ENODEV;
4abb08c2 710 if (!private->ned || !private->gneq)
3d052595
HH		 711 return -ENODEV;
712
713 memset(uid, 0, sizeof(struct dasd_uid));
4abb08c2 714 memcpy(uid->vendor, private->ned->HDA_manufacturer,
d0710c7c 715 sizeof(uid->vendor) - 1);
3d052595 716 EBCASC(uid->vendor, sizeof(uid->vendor) - 1);
4abb08c2 717 memcpy(uid->serial, private->ned->HDA_location,
d0710c7c 718 sizeof(uid->serial) - 1);
3d052595 719 EBCASC(uid->serial, sizeof(uid->serial) - 1);
4abb08c2
SW		 720 uid->ssid = private->gneq->subsystemID;
721 uid->real_unit_addr = private->ned->unit_addr;;
722 if (private->sneq) {
723 uid->type = private->sneq->sua_flags;
8e09f215 724 if (uid->type == UA_BASE_PAV_ALIAS)
4abb08c2 725 uid->base_unit_addr = private->sneq->base_unit_addr;
8e09f215
SW		 726 } else {
727 uid->type = UA_BASE_DEVICE;
728 }
4abb08c2
SW		 729 if (private->vdsneq) {
730 for (count = 0; count < 16; count++) {
731 sprintf(uid->vduit+2*count, "%02x",
732 private->vdsneq->uit[count]);
733 }
734 }
3d052595
HH		 735 return 0;
736}
737
763968e2
HC		 738static struct dasd_ccw_req *dasd_eckd_build_rcd_lpm(struct dasd_device *device,
739 void *rcd_buffer,
740 struct ciw *ciw, __u8 lpm)
17283b56
CH		 741{
742 struct dasd_ccw_req *cqr;
743 struct ccw1 *ccw;
744
745 cqr = dasd_smalloc_request("ECKD", 1 /* RCD */, ciw->count, device);
746
747 if (IS_ERR(cqr)) {
fc19f381
SH		 748 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
749 "Could not allocate RCD request");
17283b56
CH		 750 return cqr;
751 }
752
753 ccw = cqr->cpaddr;
754 ccw->cmd_code = ciw->cmd;
755 ccw->cda = (__u32)(addr_t)rcd_buffer;
756 ccw->count = ciw->count;
757
8e09f215
SW		 758 cqr->startdev = device;
759 cqr->memdev = device;
760 cqr->block = NULL;
17283b56
CH		 761 cqr->expires = 10*HZ;
762 cqr->lpm = lpm;
763 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
764 cqr->retries = 2;
765 cqr->buildclk = get_clock();
766 cqr->status = DASD_CQR_FILLED;
767 return cqr;
768}
769
770static int dasd_eckd_read_conf_lpm(struct dasd_device *device,
771 void **rcd_buffer,
772 int *rcd_buffer_size, __u8 lpm)
773{
774 struct ciw *ciw;
775 char *rcd_buf = NULL;
776 int ret;
777 struct dasd_ccw_req *cqr;
778
779 /*
780 * scan for RCD command in extended SenseID data
781 */
782 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
783 if (!ciw || ciw->cmd == 0) {
784 ret = -EOPNOTSUPP;
785 goto out_error;
786 }
787 rcd_buf = kzalloc(ciw->count, GFP_KERNEL | GFP_DMA);
788 if (!rcd_buf) {
789 ret = -ENOMEM;
790 goto out_error;
791 }
4abb08c2
SW		 792
793 /*
794 * buffer has to start with EBCDIC "V1.0" to show
795 * support for virtual device SNEQ
796 */
797 rcd_buf[0] = 0xE5;
798 rcd_buf[1] = 0xF1;
799 rcd_buf[2] = 0x4B;
800 rcd_buf[3] = 0xF0;
17283b56
CH		 801 cqr = dasd_eckd_build_rcd_lpm(device, rcd_buf, ciw, lpm);
802 if (IS_ERR(cqr)) {
803 ret = PTR_ERR(cqr);
804 goto out_error;
805 }
806 ret = dasd_sleep_on(cqr);
807 /*
808 * on success we update the user input parms
809 */
8e09f215 810 dasd_sfree_request(cqr, cqr->memdev);
17283b56
CH		 811 if (ret)
812 goto out_error;
813
814 *rcd_buffer_size = ciw->count;
815 *rcd_buffer = rcd_buf;
816 return 0;
817out_error:
818 kfree(rcd_buf);
819 *rcd_buffer = NULL;
820 *rcd_buffer_size = 0;
821 return ret;
822}
823
4abb08c2
SW		 824static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private)
825{
826
827 struct dasd_sneq *sneq;
828 int i, count;
829
830 private->ned = NULL;
831 private->sneq = NULL;
832 private->vdsneq = NULL;
833 private->gneq = NULL;
834 count = private->conf_len / sizeof(struct dasd_sneq);
835 sneq = (struct dasd_sneq *)private->conf_data;
836 for (i = 0; i < count; ++i) {
837 if (sneq->flags.identifier == 1 && sneq->format == 1)
838 private->sneq = sneq;
839 else if (sneq->flags.identifier == 1 && sneq->format == 4)
840 private->vdsneq = (struct vd_sneq *)sneq;
841 else if (sneq->flags.identifier == 2)
842 private->gneq = (struct dasd_gneq *)sneq;
843 else if (sneq->flags.identifier == 3 && sneq->res1 == 1)
844 private->ned = (struct dasd_ned *)sneq;
845 sneq++;
846 }
847 if (!private->ned || !private->gneq) {
848 private->ned = NULL;
849 private->sneq = NULL;
850 private->vdsneq = NULL;
851 private->gneq = NULL;
852 return -EINVAL;
853 }
854 return 0;
855
856};
857
858static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len)
859{
860 struct dasd_gneq *gneq;
861 int i, count, found;
862
863 count = conf_len / sizeof(*gneq);
864 gneq = (struct dasd_gneq *)conf_data;
865 found = 0;
866 for (i = 0; i < count; ++i) {
867 if (gneq->flags.identifier == 2) {
868 found = 1;
869 break;
870 }
871 gneq++;
872 }
873 if (found)
874 return ((char *)gneq)[18] & 0x07;
875 else
876 return 0;
877}
878
879static int dasd_eckd_read_conf(struct dasd_device *device)
1da177e4
LT		 880{
881 void *conf_data;
882 int conf_len, conf_data_saved;
883 int rc;
884 __u8 lpm;
885 struct dasd_eckd_private *private;
886 struct dasd_eckd_path *path_data;
887
888 private = (struct dasd_eckd_private *) device->private;
889 path_data = (struct dasd_eckd_path *) &private->path_data;
890 path_data->opm = ccw_device_get_path_mask(device->cdev);
891 lpm = 0x80;
892 conf_data_saved = 0;
1da177e4
LT		 893 /* get configuration data per operational path */
894 for (lpm = 0x80; lpm; lpm>>= 1) {
895 if (lpm & path_data->opm){
17283b56
CH		 896 rc = dasd_eckd_read_conf_lpm(device, &conf_data,
897 &conf_len, lpm);
1da177e4 898 if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */
fc19f381
SH		 899 DBF_EVENT(DBF_WARNING,
900 "Read configuration data returned "
901 "error %d for device: %s", rc,
902 dev_name(&device->cdev->dev));
1da177e4
LT		 903 return rc;
904 }
905 if (conf_data == NULL) {
fc19f381
SH		 906 DBF_EVENT(DBF_WARNING, "No configuration "
907 "data retrieved for device: %s",
908 dev_name(&device->cdev->dev));
d133a960 909 continue; /* no error */
1da177e4 910 }
1da177e4 911 /* save first valid configuration data */
4abb08c2
SW		 912 if (!conf_data_saved) {
913 kfree(private->conf_data);
914 private->conf_data = conf_data;
915 private->conf_len = conf_len;
916 if (dasd_eckd_identify_conf_parts(private)) {
917 private->conf_data = NULL;
918 private->conf_len = 0;
919 kfree(conf_data);
920 continue;
921 }
1da177e4
LT		 922 conf_data_saved++;
923 }
4abb08c2 924 switch (dasd_eckd_path_access(conf_data, conf_len)) {
1da177e4
LT		 925 case 0x02:
926 path_data->npm |= lpm;
927 break;
928 case 0x03:
929 path_data->ppm |= lpm;
930 break;
931 }
4abb08c2
SW		 932 if (conf_data != private->conf_data)
933 kfree(conf_data);
1da177e4
LT		 934 }
935 }
936 return 0;
937}
938
8e09f215
SW		 939static int dasd_eckd_read_features(struct dasd_device *device)
940{
941 struct dasd_psf_prssd_data *prssdp;
942 struct dasd_rssd_features *features;
943 struct dasd_ccw_req *cqr;
944 struct ccw1 *ccw;
945 int rc;
946 struct dasd_eckd_private *private;
947
948 private = (struct dasd_eckd_private *) device->private;
949 cqr = dasd_smalloc_request(dasd_eckd_discipline.name,
950 1 /* PSF */ + 1 /* RSSD */ ,
951 (sizeof(struct dasd_psf_prssd_data) +
952 sizeof(struct dasd_rssd_features)),
953 device);
954 if (IS_ERR(cqr)) {
fc19f381
SH		 955 DBF_EVENT(DBF_WARNING, "Could not allocate initialization "
956 "request for device: %s",
957 dev_name(&device->cdev->dev));
8e09f215
SW		 958 return PTR_ERR(cqr);
959 }
960 cqr->startdev = device;
961 cqr->memdev = device;
962 cqr->block = NULL;
963 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
964 cqr->retries = 5;
965 cqr->expires = 10 * HZ;
966
967 /* Prepare for Read Subsystem Data */
968 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
969 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
970 prssdp->order = PSF_ORDER_PRSSD;
971 prssdp->suborder = 0x41; /* Read Feature Codes */
972 /* all other bytes of prssdp must be zero */
973
974 ccw = cqr->cpaddr;
975 ccw->cmd_code = DASD_ECKD_CCW_PSF;
976 ccw->count = sizeof(struct dasd_psf_prssd_data);
977 ccw->flags |= CCW_FLAG_CC;
978 ccw->cda = (__u32)(addr_t) prssdp;
979
980 /* Read Subsystem Data - feature codes */
981 features = (struct dasd_rssd_features *) (prssdp + 1);
982 memset(features, 0, sizeof(struct dasd_rssd_features));
983
984 ccw++;
985 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
986 ccw->count = sizeof(struct dasd_rssd_features);
987 ccw->cda = (__u32)(addr_t) features;
988
989 cqr->buildclk = get_clock();
990 cqr->status = DASD_CQR_FILLED;
991 rc = dasd_sleep_on(cqr);
992 if (rc == 0) {
993 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
994 features = (struct dasd_rssd_features *) (prssdp + 1);
995 memcpy(&private->features, features,
996 sizeof(struct dasd_rssd_features));
997 }
998 dasd_sfree_request(cqr, cqr->memdev);
999 return rc;
1000}
1001
1002
40545573
HH		 1003/*
1004 * Build CP for Perform Subsystem Function - SSC.
1005 */
f3eb5384
SW		 1006static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device,
1007 int enable_pav)
40545573 1008{
8e09f215
SW		 1009 struct dasd_ccw_req *cqr;
1010 struct dasd_psf_ssc_data *psf_ssc_data;
1011 struct ccw1 *ccw;
40545573 1012
8e09f215 1013 cqr = dasd_smalloc_request("ECKD", 1 /* PSF */ ,
40545573
HH		 1014 sizeof(struct dasd_psf_ssc_data),
1015 device);
1016
8e09f215 1017 if (IS_ERR(cqr)) {
fc19f381 1018 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
40545573 1019 "Could not allocate PSF-SSC request");
8e09f215
SW		 1020 return cqr;
1021 }
1022 psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data;
1023 psf_ssc_data->order = PSF_ORDER_SSC;
f3eb5384
SW		 1024 psf_ssc_data->suborder = 0x40;
1025 if (enable_pav) {
1026 psf_ssc_data->suborder |= 0x88;
1027 psf_ssc_data->reserved[0] = 0x88;
1028 }
8e09f215
SW		 1029 ccw = cqr->cpaddr;
1030 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1031 ccw->cda = (__u32)(addr_t)psf_ssc_data;
1032 ccw->count = 66;
1033
1034 cqr->startdev = device;
1035 cqr->memdev = device;
1036 cqr->block = NULL;
1037 cqr->expires = 10*HZ;
1038 cqr->buildclk = get_clock();
1039 cqr->status = DASD_CQR_FILLED;
1040 return cqr;
40545573
HH		 1041}
1042
1043/*
1044 * Perform Subsystem Function.
1045 * It is necessary to trigger CIO for channel revalidation since this
1046 * call might change behaviour of DASD devices.
1047 */
1048static int
f3eb5384 1049dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav)
40545573 1050{
8e09f215
SW		 1051 struct dasd_ccw_req *cqr;
1052 int rc;
1053
f3eb5384 1054 cqr = dasd_eckd_build_psf_ssc(device, enable_pav);
8e09f215
SW		 1055 if (IS_ERR(cqr))
1056 return PTR_ERR(cqr);
1057
1058 rc = dasd_sleep_on(cqr);
1059 if (!rc)
1060 /* trigger CIO to reprobe devices */
1061 css_schedule_reprobe();
1062 dasd_sfree_request(cqr, cqr->memdev);
1063 return rc;
40545573
HH		 1064}
1065
1066/*
1067 * Valide storage server of current device.
1068 */
8e09f215 1069static int dasd_eckd_validate_server(struct dasd_device *device)
40545573
HH		 1070{
1071 int rc;
8e09f215 1072 struct dasd_eckd_private *private;
f3eb5384 1073 int enable_pav;
40545573 1074
40545573 1075 if (dasd_nopav || MACHINE_IS_VM)
f3eb5384
SW		 1076 enable_pav = 0;
1077 else
1078 enable_pav = 1;
1079 rc = dasd_eckd_psf_ssc(device, enable_pav);
8e79a441
HH		 1080 /* may be requested feature is not available on server,
1081 * therefore just report error and go ahead */
8e09f215 1082 private = (struct dasd_eckd_private *) device->private;
fc19f381
SH		 1083 DBF_EVENT(DBF_WARNING, "PSF-SSC on storage subsystem %s.%s.%04x "
1084 "returned rc=%d for device: %s",
1085 private->uid.vendor, private->uid.serial,
1086 private->uid.ssid, rc, dev_name(&device->cdev->dev));
40545573
HH		 1087 /* RE-Read Configuration Data */
1088 return dasd_eckd_read_conf(device);
1089}
1090
3d052595
HH		 1091/*
1092 * Check device characteristics.
1093 * If the device is accessible using ECKD discipline, the device is enabled.
1094 */
1da177e4
LT		 1095static int
1096dasd_eckd_check_characteristics(struct dasd_device *device)
1097{
1098 struct dasd_eckd_private *private;
8e09f215 1099 struct dasd_block *block;
1da177e4 1100 void *rdc_data;
8e09f215 1101 int is_known, rc;
1da177e4
LT		 1102
1103 private = (struct dasd_eckd_private *) device->private;
1104 if (private == NULL) {
138c014d 1105 private = kzalloc(sizeof(struct dasd_eckd_private),
1da177e4
LT		 1106 GFP_KERNEL | GFP_DMA);
1107 if (private == NULL) {
fc19f381
SH		 1108 dev_warn(&device->cdev->dev,
1109 "Allocating memory for private DASD data "
1110 "failed\n");
1da177e4
LT		 1111 return -ENOMEM;
1112 }
1da177e4
LT		 1113 device->private = (void *) private;
1114 }
1115 /* Invalidate status of initial analysis. */
1116 private->init_cqr_status = -1;
1117 /* Set default cache operations. */
1118 private->attrib.operation = DASD_NORMAL_CACHE;
1119 private->attrib.nr_cyl = 0;
1120
40545573
HH		 1121 /* Read Configuration Data */
1122 rc = dasd_eckd_read_conf(device);
1123 if (rc)
8e09f215 1124 goto out_err1;
40545573
HH		 1125
1126 /* Generate device unique id and register in devmap */
8e09f215 1127 rc = dasd_eckd_generate_uid(device, &private->uid);
40545573 1128 if (rc)
8e09f215
SW		 1129 goto out_err1;
1130 dasd_set_uid(device->cdev, &private->uid);
1131
1132 if (private->uid.type == UA_BASE_DEVICE) {
1133 block = dasd_alloc_block();
1134 if (IS_ERR(block)) {
fc19f381
SH		 1135 DBF_EVENT(DBF_WARNING, "could not allocate dasd "
1136 "block structure for device: %s",
1137 dev_name(&device->cdev->dev));
8e09f215
SW		 1138 rc = PTR_ERR(block);
1139 goto out_err1;
1140 }
1141 device->block = block;
1142 block->base = device;
1143 }
1144
1145 /* register lcu with alias handling, enable PAV if this is a new lcu */
1146 is_known = dasd_alias_make_device_known_to_lcu(device);
1147 if (is_known < 0) {
1148 rc = is_known;
1149 goto out_err2;
1150 }
1151 if (!is_known) {
1152 /* new lcu found */
1153 rc = dasd_eckd_validate_server(device); /* will switch pav on */
1154 if (rc)
1155 goto out_err3;
1156 }
1157
1158 /* Read Feature Codes */
1159 rc = dasd_eckd_read_features(device);
40545573 1160 if (rc)
8e09f215 1161 goto out_err3;
40545573 1162
1da177e4
LT		 1163 /* Read Device Characteristics */
1164 rdc_data = (void *) &(private->rdc_data);
3d052595 1165 memset(rdc_data, 0, sizeof(rdc_data));
17283b56 1166 rc = dasd_generic_read_dev_chars(device, "ECKD", &rdc_data, 64);
8e09f215 1167 if (rc) {
fc19f381
SH		 1168 DBF_EVENT(DBF_WARNING,
1169 "Read device characteristics failed, rc=%d for "
1170 "device: %s", rc, dev_name(&device->cdev->dev));
8e09f215
SW		 1171 goto out_err3;
1172 }
b44b0ab3
SW		 1173 /* find the vaild cylinder size */
1174 if (private->rdc_data.no_cyl == LV_COMPAT_CYL &&
1175 private->rdc_data.long_no_cyl)
1176 private->real_cyl = private->rdc_data.long_no_cyl;
1177 else
1178 private->real_cyl = private->rdc_data.no_cyl;
1179
fc19f381
SH		 1180 dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) "
1181 "with %d cylinders, %d heads, %d sectors\n",
1182 private->rdc_data.dev_type,
1183 private->rdc_data.dev_model,
1184 private->rdc_data.cu_type,
1185 private->rdc_data.cu_model.model,
b44b0ab3 1186 private->real_cyl,
fc19f381
SH		 1187 private->rdc_data.trk_per_cyl,
1188 private->rdc_data.sec_per_trk);
8e09f215
SW		 1189 return 0;
1190
1191out_err3:
1192 dasd_alias_disconnect_device_from_lcu(device);
1193out_err2:
1194 dasd_free_block(device->block);
1195 device->block = NULL;
1196out_err1:
4abb08c2 1197 kfree(private->conf_data);
8e09f215
SW		 1198 kfree(device->private);
1199 device->private = NULL;
3d052595 1200 return rc;
1da177e4
LT		 1201}
1202
8e09f215
SW		 1203static void dasd_eckd_uncheck_device(struct dasd_device *device)
1204{
4abb08c2
SW		 1205 struct dasd_eckd_private *private;
1206
1207 private = (struct dasd_eckd_private *) device->private;
8e09f215 1208 dasd_alias_disconnect_device_from_lcu(device);
4abb08c2
SW		 1209 private->ned = NULL;
1210 private->sneq = NULL;
1211 private->vdsneq = NULL;
1212 private->gneq = NULL;
1213 private->conf_len = 0;
1214 kfree(private->conf_data);
1215 private->conf_data = NULL;
8e09f215
SW		 1216}
1217
1da177e4
LT		 1218static struct dasd_ccw_req *
1219dasd_eckd_analysis_ccw(struct dasd_device *device)
1220{
1221 struct dasd_eckd_private *private;
1222 struct eckd_count *count_data;
1223 struct LO_eckd_data *LO_data;
1224 struct dasd_ccw_req *cqr;
1225 struct ccw1 *ccw;
1226 int cplength, datasize;
1227 int i;
1228
1229 private = (struct dasd_eckd_private *) device->private;
1230
1231 cplength = 8;
1232 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data);
1233 cqr = dasd_smalloc_request(dasd_eckd_discipline.name,
1234 cplength, datasize, device);
1235 if (IS_ERR(cqr))
1236 return cqr;
1237 ccw = cqr->cpaddr;
1238 /* Define extent for the first 3 tracks. */
1239 define_extent(ccw++, cqr->data, 0, 2,
1240 DASD_ECKD_CCW_READ_COUNT, device);
8e09f215 1241 LO_data = cqr->data + sizeof(struct DE_eckd_data);
1da177e4
LT		 1242 /* Locate record for the first 4 records on track 0. */
1243 ccw[-1].flags |= CCW_FLAG_CC;
1244 locate_record(ccw++, LO_data++, 0, 0, 4,
1245 DASD_ECKD_CCW_READ_COUNT, device, 0);
1246
1247 count_data = private->count_area;
1248 for (i = 0; i < 4; i++) {
1249 ccw[-1].flags |= CCW_FLAG_CC;
1250 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1251 ccw->flags = 0;
1252 ccw->count = 8;
1253 ccw->cda = (__u32)(addr_t) count_data;
1254 ccw++;
1255 count_data++;
1256 }
1257
1258 /* Locate record for the first record on track 2. */
1259 ccw[-1].flags |= CCW_FLAG_CC;
1260 locate_record(ccw++, LO_data++, 2, 0, 1,
1261 DASD_ECKD_CCW_READ_COUNT, device, 0);
1262 /* Read count ccw. */
1263 ccw[-1].flags |= CCW_FLAG_CC;
1264 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1265 ccw->flags = 0;
1266 ccw->count = 8;
1267 ccw->cda = (__u32)(addr_t) count_data;
1268
8e09f215
SW		 1269 cqr->block = NULL;
1270 cqr->startdev = device;
1271 cqr->memdev = device;
1da177e4
LT		 1272 cqr->retries = 0;
1273 cqr->buildclk = get_clock();
1274 cqr->status = DASD_CQR_FILLED;
1275 return cqr;
1276}
1277
1278/*
1279 * This is the callback function for the init_analysis cqr. It saves
1280 * the status of the initial analysis ccw before it frees it and kicks
1281 * the device to continue the startup sequence. This will call
1282 * dasd_eckd_do_analysis again (if the devices has not been marked
1283 * for deletion in the meantime).
1284 */
1285static void
1286dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, void *data)
1287{
1288 struct dasd_eckd_private *private;
1289 struct dasd_device *device;
1290
8e09f215 1291 device = init_cqr->startdev;
1da177e4
LT		 1292 private = (struct dasd_eckd_private *) device->private;
1293 private->init_cqr_status = init_cqr->status;
1294 dasd_sfree_request(init_cqr, device);
1295 dasd_kick_device(device);
1296}
1297
1298static int
8e09f215 1299dasd_eckd_start_analysis(struct dasd_block *block)
1da177e4
LT		 1300{
1301 struct dasd_eckd_private *private;
1302 struct dasd_ccw_req *init_cqr;
1303
8e09f215
SW		 1304 private = (struct dasd_eckd_private *) block->base->private;
1305 init_cqr = dasd_eckd_analysis_ccw(block->base);
1da177e4
LT		 1306 if (IS_ERR(init_cqr))
1307 return PTR_ERR(init_cqr);
1308 init_cqr->callback = dasd_eckd_analysis_callback;
1309 init_cqr->callback_data = NULL;
1310 init_cqr->expires = 5*HZ;
1311 dasd_add_request_head(init_cqr);
1312 return -EAGAIN;
1313}
1314
1315static int
8e09f215 1316dasd_eckd_end_analysis(struct dasd_block *block)
1da177e4 1317{
8e09f215 1318 struct dasd_device *device;
1da177e4
LT		 1319 struct dasd_eckd_private *private;
1320 struct eckd_count *count_area;
1321 unsigned int sb, blk_per_trk;
1322 int status, i;
1323
8e09f215 1324 device = block->base;
1da177e4
LT		 1325 private = (struct dasd_eckd_private *) device->private;
1326 status = private->init_cqr_status;
1327 private->init_cqr_status = -1;
1328 if (status != DASD_CQR_DONE) {
fc19f381
SH		 1329 dev_warn(&device->cdev->dev,
1330 "The DASD is not formatted\n");
1da177e4
LT		 1331 return -EMEDIUMTYPE;
1332 }
1333
1334 private->uses_cdl = 1;
1da177e4
LT		 1335 /* Check Track 0 for Compatible Disk Layout */
1336 count_area = NULL;
1337 for (i = 0; i < 3; i++) {
1338 if (private->count_area[i].kl != 4 ||
1339 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) {
1340 private->uses_cdl = 0;
1341 break;
1342 }
1343 }
1344 if (i == 3)
1345 count_area = &private->count_area[4];
1346
1347 if (private->uses_cdl == 0) {
1348 for (i = 0; i < 5; i++) {
1349 if ((private->count_area[i].kl != 0) ||
1350 (private->count_area[i].dl !=
1351 private->count_area[0].dl))
1352 break;
1353 }
1354 if (i == 5)
1355 count_area = &private->count_area[0];
1356 } else {
1357 if (private->count_area[3].record == 1)
fc19f381
SH		 1358 dev_warn(&device->cdev->dev,
1359 "Track 0 has no records following the VTOC\n");
1da177e4
LT		 1360 }
1361 if (count_area != NULL && count_area->kl == 0) {
1362 /* we found notthing violating our disk layout */
1363 if (dasd_check_blocksize(count_area->dl) == 0)
8e09f215 1364 block->bp_block = count_area->dl;
1da177e4 1365 }
8e09f215 1366 if (block->bp_block == 0) {
fc19f381
SH		 1367 dev_warn(&device->cdev->dev,
1368 "The disk layout of the DASD is not supported\n");
1da177e4
LT		 1369 return -EMEDIUMTYPE;
1370 }
8e09f215
SW		 1371 block->s2b_shift = 0; /* bits to shift 512 to get a block */
1372 for (sb = 512; sb < block->bp_block; sb = sb << 1)
1373 block->s2b_shift++;
1da177e4 1374
8e09f215 1375 blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block);
b44b0ab3 1376 block->blocks = (private->real_cyl *
1da177e4
LT		 1377 private->rdc_data.trk_per_cyl *
1378 blk_per_trk);
1379
fc19f381
SH		 1380 dev_info(&device->cdev->dev,
1381 "DASD with %d KB/block, %d KB total size, %d KB/track, "
1382 "%s\n", (block->bp_block >> 10),
1383 ((private->real_cyl *
1384 private->rdc_data.trk_per_cyl *
1385 blk_per_trk * (block->bp_block >> 9)) >> 1),
1386 ((blk_per_trk * block->bp_block) >> 10),
1387 private->uses_cdl ?
1388 "compatible disk layout" : "linux disk layout");
1da177e4
LT		 1389
1390 return 0;
1391}
1392
8e09f215 1393static int dasd_eckd_do_analysis(struct dasd_block *block)
1da177e4
LT		 1394{
1395 struct dasd_eckd_private *private;
1396
8e09f215 1397 private = (struct dasd_eckd_private *) block->base->private;
1da177e4 1398 if (private->init_cqr_status < 0)
8e09f215 1399 return dasd_eckd_start_analysis(block);
1da177e4 1400 else
8e09f215 1401 return dasd_eckd_end_analysis(block);
1da177e4
LT		 1402}
1403
8e09f215
SW		 1404static int dasd_eckd_ready_to_online(struct dasd_device *device)
1405{
1406 return dasd_alias_add_device(device);
1407};
1408
1409static int dasd_eckd_online_to_ready(struct dasd_device *device)
1410{
1411 return dasd_alias_remove_device(device);
1412};
1413
1da177e4 1414static int
8e09f215 1415dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo)
1da177e4
LT		 1416{
1417 struct dasd_eckd_private *private;
1418
8e09f215
SW		 1419 private = (struct dasd_eckd_private *) block->base->private;
1420 if (dasd_check_blocksize(block->bp_block) == 0) {
1da177e4 1421 geo->sectors = recs_per_track(&private->rdc_data,
8e09f215 1422 0, block->bp_block);
1da177e4
LT		 1423 }
1424 geo->cylinders = private->rdc_data.no_cyl;
1425 geo->heads = private->rdc_data.trk_per_cyl;
1426 return 0;
1427}
1428
1429static struct dasd_ccw_req *
1430dasd_eckd_format_device(struct dasd_device * device,
1431 struct format_data_t * fdata)
1432{
1433 struct dasd_eckd_private *private;
1434 struct dasd_ccw_req *fcp;
1435 struct eckd_count *ect;
1436 struct ccw1 *ccw;
1437 void *data;
b44b0ab3
SW		 1438 int rpt;
1439 struct ch_t address;
1da177e4
LT		 1440 int cplength, datasize;
1441 int i;
f9a28f7b
JBJ		 1442 int intensity = 0;
1443 int r0_perm;
1da177e4
LT		 1444
1445 private = (struct dasd_eckd_private *) device->private;
1446 rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize);
b44b0ab3
SW		 1447 set_ch_t(&address,
1448 fdata->start_unit / private->rdc_data.trk_per_cyl,
1449 fdata->start_unit % private->rdc_data.trk_per_cyl);
1da177e4
LT		 1450
1451 /* Sanity checks. */
1452 if (fdata->start_unit >=
b44b0ab3 1453 (private->real_cyl * private->rdc_data.trk_per_cyl)) {
fc19f381
SH		 1454 dev_warn(&device->cdev->dev, "Start track number %d used in "
1455 "formatting is too big\n", fdata->start_unit);
1da177e4
LT		 1456 return ERR_PTR(-EINVAL);
1457 }
1458 if (fdata->start_unit > fdata->stop_unit) {
fc19f381
SH		 1459 dev_warn(&device->cdev->dev, "Start track %d used in "
1460 "formatting exceeds end track\n", fdata->start_unit);
1da177e4
LT		 1461 return ERR_PTR(-EINVAL);
1462 }
1463 if (dasd_check_blocksize(fdata->blksize) != 0) {
fc19f381
SH		 1464 dev_warn(&device->cdev->dev,
1465 "The DASD cannot be formatted with block size %d\n",
1466 fdata->blksize);
1da177e4
LT		 1467 return ERR_PTR(-EINVAL);
1468 }
1469
1470 /*
1471 * fdata->intensity is a bit string that tells us what to do:
1472 * Bit 0: write record zero
1473 * Bit 1: write home address, currently not supported
1474 * Bit 2: invalidate tracks
1475 * Bit 3: use OS/390 compatible disk layout (cdl)
f9a28f7b 1476 * Bit 4: do not allow storage subsystem to modify record zero
1da177e4
LT		 1477 * Only some bit combinations do make sense.
1478 */
f9a28f7b
JBJ		 1479 if (fdata->intensity & 0x10) {
1480 r0_perm = 0;
1481 intensity = fdata->intensity & ~0x10;
1482 } else {
1483 r0_perm = 1;
1484 intensity = fdata->intensity;
1485 }
1486 switch (intensity) {
1da177e4
LT		 1487 case 0x00: /* Normal format */
1488 case 0x08: /* Normal format, use cdl. */
1489 cplength = 2 + rpt;
1490 datasize = sizeof(struct DE_eckd_data) +
1491 sizeof(struct LO_eckd_data) +
1492 rpt * sizeof(struct eckd_count);
1493 break;
1494 case 0x01: /* Write record zero and format track. */
1495 case 0x09: /* Write record zero and format track, use cdl. */
1496 cplength = 3 + rpt;
1497 datasize = sizeof(struct DE_eckd_data) +
1498 sizeof(struct LO_eckd_data) +
1499 sizeof(struct eckd_count) +
1500 rpt * sizeof(struct eckd_count);
1501 break;
1502 case 0x04: /* Invalidate track. */
1503 case 0x0c: /* Invalidate track, use cdl. */
1504 cplength = 3;
1505 datasize = sizeof(struct DE_eckd_data) +
1506 sizeof(struct LO_eckd_data) +
1507 sizeof(struct eckd_count);
1508 break;
1509 default:
fc19f381
SH		 1510 dev_warn(&device->cdev->dev, "An I/O control call used "
1511 "incorrect flags 0x%x\n", fdata->intensity);
1da177e4
LT		 1512 return ERR_PTR(-EINVAL);
1513 }
1514 /* Allocate the format ccw request. */
1515 fcp = dasd_smalloc_request(dasd_eckd_discipline.name,
1516 cplength, datasize, device);
1517 if (IS_ERR(fcp))
1518 return fcp;
1519
1520 data = fcp->data;
1521 ccw = fcp->cpaddr;
1522
f9a28f7b 1523 switch (intensity & ~0x08) {
1da177e4
LT		 1524 case 0x00: /* Normal format. */
1525 define_extent(ccw++, (struct DE_eckd_data *) data,
1526 fdata->start_unit, fdata->start_unit,
1527 DASD_ECKD_CCW_WRITE_CKD, device);
f9a28f7b
JBJ		 1528 /* grant subsystem permission to format R0 */
1529 if (r0_perm)
1530 ((struct DE_eckd_data *)data)->ga_extended |= 0x04;
1da177e4
LT		 1531 data += sizeof(struct DE_eckd_data);
1532 ccw[-1].flags |= CCW_FLAG_CC;
1533 locate_record(ccw++, (struct LO_eckd_data *) data,
1534 fdata->start_unit, 0, rpt,
1535 DASD_ECKD_CCW_WRITE_CKD, device,
1536 fdata->blksize);
1537 data += sizeof(struct LO_eckd_data);
1538 break;
1539 case 0x01: /* Write record zero + format track. */
1540 define_extent(ccw++, (struct DE_eckd_data *) data,
1541 fdata->start_unit, fdata->start_unit,
1542 DASD_ECKD_CCW_WRITE_RECORD_ZERO,
1543 device);
1544 data += sizeof(struct DE_eckd_data);
1545 ccw[-1].flags |= CCW_FLAG_CC;
1546 locate_record(ccw++, (struct LO_eckd_data *) data,
1547 fdata->start_unit, 0, rpt + 1,
1548 DASD_ECKD_CCW_WRITE_RECORD_ZERO, device,
8e09f215 1549 device->block->bp_block);
1da177e4
LT		 1550 data += sizeof(struct LO_eckd_data);
1551 break;
1552 case 0x04: /* Invalidate track. */
1553 define_extent(ccw++, (struct DE_eckd_data *) data,
1554 fdata->start_unit, fdata->start_unit,
1555 DASD_ECKD_CCW_WRITE_CKD, device);
1556 data += sizeof(struct DE_eckd_data);
1557 ccw[-1].flags |= CCW_FLAG_CC;
1558 locate_record(ccw++, (struct LO_eckd_data *) data,
1559 fdata->start_unit, 0, 1,
1560 DASD_ECKD_CCW_WRITE_CKD, device, 8);
1561 data += sizeof(struct LO_eckd_data);
1562 break;
1563 }
f9a28f7b 1564 if (intensity & 0x01) { /* write record zero */
1da177e4
LT		 1565 ect = (struct eckd_count *) data;
1566 data += sizeof(struct eckd_count);
b44b0ab3
SW		 1567 ect->cyl = address.cyl;
1568 ect->head = address.head;
1da177e4
LT		 1569 ect->record = 0;
1570 ect->kl = 0;
1571 ect->dl = 8;
1572 ccw[-1].flags |= CCW_FLAG_CC;
1573 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO;
1574 ccw->flags = CCW_FLAG_SLI;
1575 ccw->count = 8;
1576 ccw->cda = (__u32)(addr_t) ect;
1577 ccw++;
1578 }
f9a28f7b 1579 if ((intensity & ~0x08) & 0x04) { /* erase track */
1da177e4
LT		 1580 ect = (struct eckd_count *) data;
1581 data += sizeof(struct eckd_count);
b44b0ab3
SW		 1582 ect->cyl = address.cyl;
1583 ect->head = address.head;
1da177e4
LT		 1584 ect->record = 1;
1585 ect->kl = 0;
1586 ect->dl = 0;
1587 ccw[-1].flags |= CCW_FLAG_CC;
1588 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
1589 ccw->flags = CCW_FLAG_SLI;
1590 ccw->count = 8;
1591 ccw->cda = (__u32)(addr_t) ect;
1592 } else { /* write remaining records */
1593 for (i = 0; i < rpt; i++) {
1594 ect = (struct eckd_count *) data;
1595 data += sizeof(struct eckd_count);
b44b0ab3
SW		 1596 ect->cyl = address.cyl;
1597 ect->head = address.head;
1da177e4
LT		 1598 ect->record = i + 1;
1599 ect->kl = 0;
1600 ect->dl = fdata->blksize;
1601 /* Check for special tracks 0-1 when formatting CDL */
f9a28f7b 1602 if ((intensity & 0x08) &&
1da177e4
LT		 1603 fdata->start_unit == 0) {
1604 if (i < 3) {
1605 ect->kl = 4;
1606 ect->dl = sizes_trk0[i] - 4;
138c014d 1607 }
1da177e4 1608 }
f9a28f7b 1609 if ((intensity & 0x08) &&
1da177e4
LT		 1610 fdata->start_unit == 1) {
1611 ect->kl = 44;
1612 ect->dl = LABEL_SIZE - 44;
1613 }
1614 ccw[-1].flags |= CCW_FLAG_CC;
1615 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
1616 ccw->flags = CCW_FLAG_SLI;
1617 ccw->count = 8;
1618 ccw->cda = (__u32)(addr_t) ect;
1619 ccw++;
1620 }
1621 }
8e09f215
SW		 1622 fcp->startdev = device;
1623 fcp->memdev = device;
1624 clear_bit(DASD_CQR_FLAGS_USE_ERP, &fcp->flags);
1625 fcp->retries = 5; /* set retry counter to enable default ERP */
1da177e4
LT		 1626 fcp->buildclk = get_clock();
1627 fcp->status = DASD_CQR_FILLED;
1628 return fcp;
1629}
1630
8e09f215 1631static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr)
1da177e4 1632{
8e09f215
SW		 1633 cqr->status = DASD_CQR_FILLED;
1634 if (cqr->block && (cqr->startdev != cqr->block->base)) {
1635 dasd_eckd_reset_ccw_to_base_io(cqr);
1636 cqr->startdev = cqr->block->base;
1da177e4 1637 }
8e09f215 1638};
1da177e4
LT		 1639
1640static dasd_erp_fn_t
1641dasd_eckd_erp_action(struct dasd_ccw_req * cqr)
1642{
8e09f215 1643 struct dasd_device *device = (struct dasd_device *) cqr->startdev;
1da177e4
LT		 1644 struct ccw_device *cdev = device->cdev;
1645
1646 switch (cdev->id.cu_type) {
1647 case 0x3990:
1648 case 0x2105:
1649 case 0x2107:
1650 case 0x1750:
1651 return dasd_3990_erp_action;
1652 case 0x9343:
1653 case 0x3880:
1654 default:
1655 return dasd_default_erp_action;
1656 }
1657}
1658
1659static dasd_erp_fn_t
1660dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr)
1661{
1662 return dasd_default_erp_postaction;
1663}
1664
8e09f215
SW		 1665
1666static void dasd_eckd_handle_unsolicited_interrupt(struct dasd_device *device,
1667 struct irb *irb)
1668{
1669 char mask;
f3eb5384 1670 char *sense = NULL;
8e09f215
SW		 1671
1672 /* first of all check for state change pending interrupt */
1673 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP;
f3eb5384 1674 if ((scsw_dstat(&irb->scsw) & mask) == mask) {
8e09f215
SW		 1675 dasd_generic_handle_state_change(device);
1676 return;
1677 }
1678
1679 /* summary unit check */
f3eb5384 1680 if ((scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) &&
23d805b6 1681 (irb->ecw[7] == 0x0D)) {
8e09f215
SW		 1682 dasd_alias_handle_summary_unit_check(device, irb);
1683 return;
1684 }
1685
f3eb5384 1686 sense = dasd_get_sense(irb);
f60c768c 1687 /* service information message SIM */
f3eb5384
SW		 1688 if (sense && !(sense[27] & DASD_SENSE_BIT_0) &&
1689 ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) {
1690 dasd_3990_erp_handle_sim(device, sense);
9d853caf 1691 dasd_schedule_device_bh(device);
f60c768c
SH		 1692 return;
1693 }
1694
f3eb5384
SW		 1695 if ((scsw_cc(&irb->scsw) == 1) &&
1696 (scsw_fctl(&irb->scsw) & SCSW_FCTL_START_FUNC) &&
1697 (scsw_actl(&irb->scsw) & SCSW_ACTL_START_PEND) &&
1698 (scsw_stctl(&irb->scsw) & SCSW_STCTL_STATUS_PEND)) {
ada3df91
SH		 1699 /* fake irb do nothing, they are handled elsewhere */
1700 dasd_schedule_device_bh(device);
1701 return;
1702 }
8e09f215 1703
f3eb5384 1704 if (!sense) {
ada3df91 1705 /* just report other unsolicited interrupts */
fc19f381 1706 DBF_DEV_EVENT(DBF_ERR, device, "%s",
ada3df91
SH		 1707 "unsolicited interrupt received");
1708 } else {
fc19f381 1709 DBF_DEV_EVENT(DBF_ERR, device, "%s",
ada3df91
SH		 1710 "unsolicited interrupt received "
1711 "(sense available)");
fc19f381
SH		 1712 device->discipline->dump_sense_dbf(device, NULL, irb,
1713 "unsolicited");
ada3df91
SH		 1714 }
1715
1716 dasd_schedule_device_bh(device);
8e09f215
SW		 1717 return;
1718};
1719
f3eb5384
SW		 1720
1721static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single(
1722 struct dasd_device *startdev,
8e09f215 1723 struct dasd_block *block,
f3eb5384
SW		 1724 struct request *req,
1725 sector_t first_rec,
1726 sector_t last_rec,
1727 sector_t first_trk,
1728 sector_t last_trk,
1729 unsigned int first_offs,
1730 unsigned int last_offs,
1731 unsigned int blk_per_trk,
1732 unsigned int blksize)
1da177e4
LT		 1733{
1734 struct dasd_eckd_private *private;
1735 unsigned long *idaws;
1736 struct LO_eckd_data *LO_data;
1737 struct dasd_ccw_req *cqr;
1738 struct ccw1 *ccw;
5705f702 1739 struct req_iterator iter;
1da177e4
LT		 1740 struct bio_vec *bv;
1741 char *dst;
f3eb5384 1742 unsigned int off;
1da177e4 1743 int count, cidaw, cplength, datasize;
f3eb5384 1744 sector_t recid;
1da177e4 1745 unsigned char cmd, rcmd;
8e09f215
SW		 1746 int use_prefix;
1747 struct dasd_device *basedev;
1da177e4 1748
8e09f215
SW		 1749 basedev = block->base;
1750 private = (struct dasd_eckd_private *) basedev->private;
1da177e4
LT		 1751 if (rq_data_dir(req) == READ)
1752 cmd = DASD_ECKD_CCW_READ_MT;
1753 else if (rq_data_dir(req) == WRITE)
1754 cmd = DASD_ECKD_CCW_WRITE_MT;
1755 else
1756 return ERR_PTR(-EINVAL);
f3eb5384 1757
1da177e4
LT		 1758 /* Check struct bio and count the number of blocks for the request. */
1759 count = 0;
1760 cidaw = 0;
5705f702 1761 rq_for_each_segment(bv, req, iter) {
6c92e699
JA		 1762 if (bv->bv_len & (blksize - 1))
1763 /* Eckd can only do full blocks. */
1764 return ERR_PTR(-EINVAL);
8e09f215 1765 count += bv->bv_len >> (block->s2b_shift + 9);
347a8dc3 1766#if defined(CONFIG_64BIT)
6c92e699 1767 if (idal_is_needed (page_address(bv->bv_page), bv->bv_len))
8e09f215 1768 cidaw += bv->bv_len >> (block->s2b_shift + 9);
1da177e4 1769#endif
1da177e4
LT		 1770 }
1771 /* Paranoia. */
1772 if (count != last_rec - first_rec + 1)
1773 return ERR_PTR(-EINVAL);
8e09f215
SW		 1774
1775 /* use the prefix command if available */
1776 use_prefix = private->features.feature[8] & 0x01;
1777 if (use_prefix) {
1778 /* 1x prefix + number of blocks */
1779 cplength = 2 + count;
1780 /* 1x prefix + cidaws*sizeof(long) */
1781 datasize = sizeof(struct PFX_eckd_data) +
1782 sizeof(struct LO_eckd_data) +
1783 cidaw * sizeof(unsigned long);
1784 } else {
1785 /* 1x define extent + 1x locate record + number of blocks */
1786 cplength = 2 + count;
1787 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */
1788 datasize = sizeof(struct DE_eckd_data) +
1789 sizeof(struct LO_eckd_data) +
1790 cidaw * sizeof(unsigned long);
1791 }
1da177e4
LT		 1792 /* Find out the number of additional locate record ccws for cdl. */
1793 if (private->uses_cdl && first_rec < 2*blk_per_trk) {
1794 if (last_rec >= 2*blk_per_trk)
1795 count = 2*blk_per_trk - first_rec;
1796 cplength += count;
1797 datasize += count*sizeof(struct LO_eckd_data);
1798 }
1799 /* Allocate the ccw request. */
1800 cqr = dasd_smalloc_request(dasd_eckd_discipline.name,
8e09f215 1801 cplength, datasize, startdev);
1da177e4
LT		 1802 if (IS_ERR(cqr))
1803 return cqr;
1804 ccw = cqr->cpaddr;
8e09f215
SW		 1805 /* First ccw is define extent or prefix. */
1806 if (use_prefix) {
1807 if (prefix(ccw++, cqr->data, first_trk,
1808 last_trk, cmd, basedev, startdev) == -EAGAIN) {
1809 /* Clock not in sync and XRC is enabled.
1810 * Try again later.
1811 */
1812 dasd_sfree_request(cqr, startdev);
1813 return ERR_PTR(-EAGAIN);
1814 }
1815 idaws = (unsigned long *) (cqr->data +
1816 sizeof(struct PFX_eckd_data));
1817 } else {
1818 if (define_extent(ccw++, cqr->data, first_trk,
1819 last_trk, cmd, startdev) == -EAGAIN) {
1820 /* Clock not in sync and XRC is enabled.
1821 * Try again later.
1822 */
1823 dasd_sfree_request(cqr, startdev);
1824 return ERR_PTR(-EAGAIN);
1825 }
1826 idaws = (unsigned long *) (cqr->data +
1827 sizeof(struct DE_eckd_data));
d54853ef 1828 }
1da177e4 1829 /* Build locate_record+read/write/ccws. */
1da177e4
LT		 1830 LO_data = (struct LO_eckd_data *) (idaws + cidaw);
1831 recid = first_rec;
1832 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) {
1833 /* Only standard blocks so there is just one locate record. */
1834 ccw[-1].flags |= CCW_FLAG_CC;
1835 locate_record(ccw++, LO_data++, first_trk, first_offs + 1,
8e09f215 1836 last_rec - recid + 1, cmd, basedev, blksize);
1da177e4 1837 }
5705f702 1838 rq_for_each_segment(bv, req, iter) {
1da177e4
LT		 1839 dst = page_address(bv->bv_page) + bv->bv_offset;
1840 if (dasd_page_cache) {
1841 char *copy = kmem_cache_alloc(dasd_page_cache,
441e143e 1842 GFP_DMA | __GFP_NOWARN);
1da177e4
LT		 1843 if (copy && rq_data_dir(req) == WRITE)
1844 memcpy(copy + bv->bv_offset, dst, bv->bv_len);
1845 if (copy)
1846 dst = copy + bv->bv_offset;
1847 }
1848 for (off = 0; off < bv->bv_len; off += blksize) {
1849 sector_t trkid = recid;
1850 unsigned int recoffs = sector_div(trkid, blk_per_trk);
1851 rcmd = cmd;
1852 count = blksize;
1853 /* Locate record for cdl special block ? */
1854 if (private->uses_cdl && recid < 2*blk_per_trk) {
1855 if (dasd_eckd_cdl_special(blk_per_trk, recid)){
1856 rcmd |= 0x8;
1857 count = dasd_eckd_cdl_reclen(recid);
ec5883ab
HH		 1858 if (count < blksize &&
1859 rq_data_dir(req) == READ)
1da177e4
LT		 1860 memset(dst + count, 0xe5,
1861 blksize - count);
1862 }
1863 ccw[-1].flags |= CCW_FLAG_CC;
1864 locate_record(ccw++, LO_data++,
1865 trkid, recoffs + 1,
8e09f215 1866 1, rcmd, basedev, count);
1da177e4
LT		 1867 }
1868 /* Locate record for standard blocks ? */
1869 if (private->uses_cdl && recid == 2*blk_per_trk) {
1870 ccw[-1].flags |= CCW_FLAG_CC;
1871 locate_record(ccw++, LO_data++,
1872 trkid, recoffs + 1,
1873 last_rec - recid + 1,
8e09f215 1874 cmd, basedev, count);
1da177e4
LT		 1875 }
1876 /* Read/write ccw. */
1877 ccw[-1].flags |= CCW_FLAG_CC;
1878 ccw->cmd_code = rcmd;
1879 ccw->count = count;
1880 if (idal_is_needed(dst, blksize)) {
1881 ccw->cda = (__u32)(addr_t) idaws;
1882 ccw->flags = CCW_FLAG_IDA;
1883 idaws = idal_create_words(idaws, dst, blksize);
1884 } else {
1885 ccw->cda = (__u32)(addr_t) dst;
1886 ccw->flags = 0;
1887 }
1888 ccw++;
1889 dst += blksize;
1890 recid++;
1891 }
1892 }
13de227b
HS		 1893 if (blk_noretry_request(req) ||
1894 block->base->features & DASD_FEATURE_FAILFAST)
1c01b8a5 1895 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
8e09f215
SW		 1896 cqr->startdev = startdev;
1897 cqr->memdev = startdev;
1898 cqr->block = block;
1da177e4
LT		 1899 cqr->expires = 5 * 60 * HZ; /* 5 minutes */
1900 cqr->lpm = private->path_data.ppm;
1901 cqr->retries = 256;
1902 cqr->buildclk = get_clock();
1903 cqr->status = DASD_CQR_FILLED;
1904 return cqr;
1905}
1906
f3eb5384
SW		 1907static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track(
1908 struct dasd_device *startdev,
1909 struct dasd_block *block,
1910 struct request *req,
1911 sector_t first_rec,
1912 sector_t last_rec,
1913 sector_t first_trk,
1914 sector_t last_trk,
1915 unsigned int first_offs,
1916 unsigned int last_offs,
1917 unsigned int blk_per_trk,
1918 unsigned int blksize)
1919{
1920 struct dasd_eckd_private *private;
1921 unsigned long *idaws;
1922 struct dasd_ccw_req *cqr;
1923 struct ccw1 *ccw;
1924 struct req_iterator iter;
1925 struct bio_vec *bv;
1926 char *dst, *idaw_dst;
1927 unsigned int cidaw, cplength, datasize;
1928 unsigned int tlf;
1929 sector_t recid;
1930 unsigned char cmd;
1931 struct dasd_device *basedev;
1932 unsigned int trkcount, count, count_to_trk_end;
1933 unsigned int idaw_len, seg_len, part_len, len_to_track_end;
1934 unsigned char new_track, end_idaw;
1935 sector_t trkid;
1936 unsigned int recoffs;
1937
1938 basedev = block->base;
1939 private = (struct dasd_eckd_private *) basedev->private;
1940 if (rq_data_dir(req) == READ)
1941 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
1942 else if (rq_data_dir(req) == WRITE)
1943 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
1944 else
1945 return ERR_PTR(-EINVAL);
1946
1947 /* Track based I/O needs IDAWs for each page, and not just for
1948 * 64 bit addresses. We need additional idals for pages
1949 * that get filled from two tracks, so we use the number
1950 * of records as upper limit.
1951 */
1952 cidaw = last_rec - first_rec + 1;
1953 trkcount = last_trk - first_trk + 1;
1954
1955 /* 1x prefix + one read/write ccw per track */
1956 cplength = 1 + trkcount;
1957
1958 /* on 31-bit we need space for two 32 bit addresses per page
1959 * on 64-bit one 64 bit address
1960 */
1961 datasize = sizeof(struct PFX_eckd_data) +
1962 cidaw * sizeof(unsigned long long);
1963
1964 /* Allocate the ccw request. */
1965 cqr = dasd_smalloc_request(dasd_eckd_discipline.name,
1966 cplength, datasize, startdev);
1967 if (IS_ERR(cqr))
1968 return cqr;
1969 ccw = cqr->cpaddr;
1970 /* transfer length factor: how many bytes to read from the last track */
1971 if (first_trk == last_trk)
1972 tlf = last_offs - first_offs + 1;
1973 else
1974 tlf = last_offs + 1;
1975 tlf *= blksize;
1976
1977 if (prefix_LRE(ccw++, cqr->data, first_trk,
1978 last_trk, cmd, basedev, startdev,
1979 1 /* format */, first_offs + 1,
1980 trkcount, blksize,
1981 tlf) == -EAGAIN) {
1982 /* Clock not in sync and XRC is enabled.
1983 * Try again later.
1984 */
1985 dasd_sfree_request(cqr, startdev);
1986 return ERR_PTR(-EAGAIN);
1987 }
1988
1989 /*
1990 * The translation of request into ccw programs must meet the
1991 * following conditions:
1992 * - all idaws but the first and the last must address full pages
1993 * (or 2K blocks on 31-bit)
1994 * - the scope of a ccw and it's idal ends with the track boundaries
1995 */
1996 idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data));
1997 recid = first_rec;
1998 new_track = 1;
1999 end_idaw = 0;
2000 len_to_track_end = 0;
2001 idaw_dst = 0;
2002 idaw_len = 0;
2003 rq_for_each_segment(bv, req, iter) {
2004 dst = page_address(bv->bv_page) + bv->bv_offset;
2005 seg_len = bv->bv_len;
2006 while (seg_len) {
2007 if (new_track) {
2008 trkid = recid;
2009 recoffs = sector_div(trkid, blk_per_trk);
2010 count_to_trk_end = blk_per_trk - recoffs;
2011 count = min((last_rec - recid + 1),
2012 (sector_t)count_to_trk_end);
2013 len_to_track_end = count * blksize;
2014 ccw[-1].flags |= CCW_FLAG_CC;
2015 ccw->cmd_code = cmd;
2016 ccw->count = len_to_track_end;
2017 ccw->cda = (__u32)(addr_t)idaws;
2018 ccw->flags = CCW_FLAG_IDA;
2019 ccw++;
2020 recid += count;
2021 new_track = 0;
52db45c3
SW		 2022 /* first idaw for a ccw may start anywhere */
2023 if (!idaw_dst)
2024 idaw_dst = dst;
f3eb5384 2025 }
52db45c3
SW		 2026 /* If we start a new idaw, we must make sure that it
2027 * starts on an IDA_BLOCK_SIZE boundary.
f3eb5384
SW		 2028 * If we continue an idaw, we must make sure that the
2029 * current segment begins where the so far accumulated
2030 * idaw ends
2031 */
52db45c3
SW		 2032 if (!idaw_dst) {
2033 if (__pa(dst) & (IDA_BLOCK_SIZE-1)) {
2034 dasd_sfree_request(cqr, startdev);
2035 return ERR_PTR(-ERANGE);
2036 } else
2037 idaw_dst = dst;
2038 }
f3eb5384
SW		 2039 if ((idaw_dst + idaw_len) != dst) {
2040 dasd_sfree_request(cqr, startdev);
2041 return ERR_PTR(-ERANGE);
2042 }
2043 part_len = min(seg_len, len_to_track_end);
2044 seg_len -= part_len;
2045 dst += part_len;
2046 idaw_len += part_len;
2047 len_to_track_end -= part_len;
2048 /* collected memory area ends on an IDA_BLOCK border,
2049 * -> create an idaw
2050 * idal_create_words will handle cases where idaw_len
2051 * is larger then IDA_BLOCK_SIZE
2052 */
2053 if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1)))
2054 end_idaw = 1;
2055 /* We also need to end the idaw at track end */
2056 if (!len_to_track_end) {
2057 new_track = 1;
2058 end_idaw = 1;
2059 }
2060 if (end_idaw) {
2061 idaws = idal_create_words(idaws, idaw_dst,
2062 idaw_len);
2063 idaw_dst = 0;
2064 idaw_len = 0;
2065 end_idaw = 0;
2066 }
2067 }
2068 }
2069
2070 if (blk_noretry_request(req) ||
2071 block->base->features & DASD_FEATURE_FAILFAST)
2072 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2073 cqr->startdev = startdev;
2074 cqr->memdev = startdev;
2075 cqr->block = block;
2076 cqr->expires = 5 * 60 * HZ; /* 5 minutes */
2077 cqr->lpm = private->path_data.ppm;
2078 cqr->retries = 256;
2079 cqr->buildclk = get_clock();
2080 cqr->status = DASD_CQR_FILLED;
2081 return cqr;
2082}
2083
2084static int prepare_itcw(struct itcw *itcw,
2085 unsigned int trk, unsigned int totrk, int cmd,
2086 struct dasd_device *basedev,
2087 struct dasd_device *startdev,
2088 unsigned int rec_on_trk, int count,
2089 unsigned int blksize,
2090 unsigned int total_data_size,
2091 unsigned int tlf,
2092 unsigned int blk_per_trk)
2093{
2094 struct PFX_eckd_data pfxdata;
2095 struct dasd_eckd_private *basepriv, *startpriv;
2096 struct DE_eckd_data *dedata;
2097 struct LRE_eckd_data *lredata;
2098 struct dcw *dcw;
2099
2100 u32 begcyl, endcyl;
2101 u16 heads, beghead, endhead;
2102 u8 pfx_cmd;
2103
2104 int rc = 0;
2105 int sector = 0;
2106 int dn, d;
2107
2108
2109 /* setup prefix data */
2110 basepriv = (struct dasd_eckd_private *) basedev->private;
2111 startpriv = (struct dasd_eckd_private *) startdev->private;
2112 dedata = &pfxdata.define_extent;
2113 lredata = &pfxdata.locate_record;
2114
2115 memset(&pfxdata, 0, sizeof(pfxdata));
2116 pfxdata.format = 1; /* PFX with LRE */
2117 pfxdata.base_address = basepriv->ned->unit_addr;
2118 pfxdata.base_lss = basepriv->ned->ID;
2119 pfxdata.validity.define_extent = 1;
2120
2121 /* private uid is kept up to date, conf_data may be outdated */
2122 if (startpriv->uid.type != UA_BASE_DEVICE) {
2123 pfxdata.validity.verify_base = 1;
2124 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS)
2125 pfxdata.validity.hyper_pav = 1;
2126 }
2127
2128 switch (cmd) {
2129 case DASD_ECKD_CCW_READ_TRACK_DATA:
2130 dedata->mask.perm = 0x1;
2131 dedata->attributes.operation = basepriv->attrib.operation;
2132 dedata->blk_size = blksize;
2133 dedata->ga_extended |= 0x42;
2134 lredata->operation.orientation = 0x0;
2135 lredata->operation.operation = 0x0C;
2136 lredata->auxiliary.check_bytes = 0x01;
2137 pfx_cmd = DASD_ECKD_CCW_PFX_READ;
2138 break;
2139 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
2140 dedata->mask.perm = 0x02;
2141 dedata->attributes.operation = basepriv->attrib.operation;
2142 dedata->blk_size = blksize;
2143 rc = check_XRC_on_prefix(&pfxdata, basedev);
2144 dedata->ga_extended |= 0x42;
2145 lredata->operation.orientation = 0x0;
2146 lredata->operation.operation = 0x3F;
2147 lredata->extended_operation = 0x23;
2148 lredata->auxiliary.check_bytes = 0x2;
2149 pfx_cmd = DASD_ECKD_CCW_PFX;
2150 break;
2151 default:
2152 DBF_DEV_EVENT(DBF_ERR, basedev,
2153 "prepare itcw, unknown opcode 0x%x", cmd);
2154 BUG();
2155 break;
2156 }
2157 if (rc)
2158 return rc;
2159
2160 dedata->attributes.mode = 0x3; /* ECKD */
2161
2162 heads = basepriv->rdc_data.trk_per_cyl;
2163 begcyl = trk / heads;
2164 beghead = trk % heads;
2165 endcyl = totrk / heads;
2166 endhead = totrk % heads;
2167
2168 /* check for sequential prestage - enhance cylinder range */
2169 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE ||
2170 dedata->attributes.operation == DASD_SEQ_ACCESS) {
2171
2172 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl)
2173 endcyl += basepriv->attrib.nr_cyl;
2174 else
2175 endcyl = (basepriv->real_cyl - 1);
2176 }
2177
2178 set_ch_t(&dedata->beg_ext, begcyl, beghead);
2179 set_ch_t(&dedata->end_ext, endcyl, endhead);
2180
2181 dedata->ep_format = 0x20; /* records per track is valid */
2182 dedata->ep_rec_per_track = blk_per_trk;
2183
2184 if (rec_on_trk) {
2185 switch (basepriv->rdc_data.dev_type) {
2186 case 0x3390:
2187 dn = ceil_quot(blksize + 6, 232);
2188 d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34);
2189 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
2190 break;
2191 case 0x3380:
2192 d = 7 + ceil_quot(blksize + 12, 32);
2193 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
2194 break;
2195 }
2196 }
2197
2198 lredata->auxiliary.length_valid = 1;
2199 lredata->auxiliary.length_scope = 1;
2200 lredata->auxiliary.imbedded_ccw_valid = 1;
2201 lredata->length = tlf;
2202 lredata->imbedded_ccw = cmd;
2203 lredata->count = count;
2204 lredata->sector = sector;
2205 set_ch_t(&lredata->seek_addr, begcyl, beghead);
2206 lredata->search_arg.cyl = lredata->seek_addr.cyl;
2207 lredata->search_arg.head = lredata->seek_addr.head;
2208 lredata->search_arg.record = rec_on_trk;
2209
2210 dcw = itcw_add_dcw(itcw, pfx_cmd, 0,
2211 &pfxdata, sizeof(pfxdata), total_data_size);
2212
2213 return rc;
2214}
2215
2216static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track(
2217 struct dasd_device *startdev,
2218 struct dasd_block *block,
2219 struct request *req,
2220 sector_t first_rec,
2221 sector_t last_rec,
2222 sector_t first_trk,
2223 sector_t last_trk,
2224 unsigned int first_offs,
2225 unsigned int last_offs,
2226 unsigned int blk_per_trk,
2227 unsigned int blksize)
2228{
2229 struct dasd_eckd_private *private;
2230 struct dasd_ccw_req *cqr;
2231 struct req_iterator iter;
2232 struct bio_vec *bv;
2233 char *dst;
2234 unsigned int trkcount, ctidaw;
2235 unsigned char cmd;
2236 struct dasd_device *basedev;
2237 unsigned int tlf;
2238 struct itcw *itcw;
2239 struct tidaw *last_tidaw = NULL;
2240 int itcw_op;
2241 size_t itcw_size;
2242
2243 basedev = block->base;
2244 private = (struct dasd_eckd_private *) basedev->private;
2245 if (rq_data_dir(req) == READ) {
2246 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
2247 itcw_op = ITCW_OP_READ;
2248 } else if (rq_data_dir(req) == WRITE) {
2249 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
2250 itcw_op = ITCW_OP_WRITE;
2251 } else
2252 return ERR_PTR(-EINVAL);
2253
2254 /* trackbased I/O needs address all memory via TIDAWs,
2255 * not just for 64 bit addresses. This allows us to map
2256 * each segment directly to one tidaw.
2257 */
2258 trkcount = last_trk - first_trk + 1;
2259 ctidaw = 0;
2260 rq_for_each_segment(bv, req, iter) {
2261 ++ctidaw;
2262 }
2263
2264 /* Allocate the ccw request. */
2265 itcw_size = itcw_calc_size(0, ctidaw, 0);
2266 cqr = dasd_smalloc_request(dasd_eckd_discipline.name,
2267 0, itcw_size, startdev);
2268 if (IS_ERR(cqr))
2269 return cqr;
2270
2271 cqr->cpmode = 1;
2272 cqr->startdev = startdev;
2273 cqr->memdev = startdev;
2274 cqr->block = block;
2275 cqr->expires = 100*HZ;
2276 cqr->buildclk = get_clock();
2277 cqr->status = DASD_CQR_FILLED;
2278 cqr->retries = 10;
2279
2280 /* transfer length factor: how many bytes to read from the last track */
2281 if (first_trk == last_trk)
2282 tlf = last_offs - first_offs + 1;
2283 else
2284 tlf = last_offs + 1;
2285 tlf *= blksize;
2286
2287 itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0);
2288 cqr->cpaddr = itcw_get_tcw(itcw);
2289
2290 if (prepare_itcw(itcw, first_trk, last_trk,
2291 cmd, basedev, startdev,
2292 first_offs + 1,
2293 trkcount, blksize,
2294 (last_rec - first_rec + 1) * blksize,
2295 tlf, blk_per_trk) == -EAGAIN) {
2296 /* Clock not in sync and XRC is enabled.
2297 * Try again later.
2298 */
2299 dasd_sfree_request(cqr, startdev);
2300 return ERR_PTR(-EAGAIN);
2301 }
2302
2303 /*
2304 * A tidaw can address 4k of memory, but must not cross page boundaries
2305 * We can let the block layer handle this by setting
2306 * blk_queue_segment_boundary to page boundaries and
2307 * blk_max_segment_size to page size when setting up the request queue.
2308 */
2309 rq_for_each_segment(bv, req, iter) {
2310 dst = page_address(bv->bv_page) + bv->bv_offset;
2311 last_tidaw = itcw_add_tidaw(itcw, 0x00, dst, bv->bv_len);
2312 if (IS_ERR(last_tidaw))
2313 return (struct dasd_ccw_req *)last_tidaw;
2314 }
2315
2316 last_tidaw->flags |= 0x80;
2317 itcw_finalize(itcw);
2318
2319 if (blk_noretry_request(req) ||
2320 block->base->features & DASD_FEATURE_FAILFAST)
2321 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2322 cqr->startdev = startdev;
2323 cqr->memdev = startdev;
2324 cqr->block = block;
2325 cqr->expires = 5 * 60 * HZ; /* 5 minutes */
2326 cqr->lpm = private->path_data.ppm;
2327 cqr->retries = 256;
2328 cqr->buildclk = get_clock();
2329 cqr->status = DASD_CQR_FILLED;
2330 return cqr;
2331}
2332
2333static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev,
2334 struct dasd_block *block,
2335 struct request *req)
2336{
2337 int tpm, cmdrtd, cmdwtd;
2338 int use_prefix;
2339
2340 struct dasd_eckd_private *private;
2341 int fcx_in_css, fcx_in_gneq, fcx_in_features;
2342 struct dasd_device *basedev;
2343 sector_t first_rec, last_rec;
2344 sector_t first_trk, last_trk;
2345 unsigned int first_offs, last_offs;
2346 unsigned int blk_per_trk, blksize;
2347 int cdlspecial;
2348 struct dasd_ccw_req *cqr;
2349
2350 basedev = block->base;
2351 private = (struct dasd_eckd_private *) basedev->private;
2352
2353 /* Calculate number of blocks/records per track. */
2354 blksize = block->bp_block;
2355 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
2356 /* Calculate record id of first and last block. */
83096ebf 2357 first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift;
f3eb5384
SW		 2358 first_offs = sector_div(first_trk, blk_per_trk);
2359 last_rec = last_trk =
83096ebf 2360 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift;
f3eb5384
SW		 2361 last_offs = sector_div(last_trk, blk_per_trk);
2362 cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk);
2363
2364 /* is transport mode supported ? */
2365 fcx_in_css = css_general_characteristics.fcx;
2366 fcx_in_gneq = private->gneq->reserved2[7] & 0x04;
2367 fcx_in_features = private->features.feature[40] & 0x80;
2368 tpm = fcx_in_css && fcx_in_gneq && fcx_in_features;
2369
2370 /* is read track data and write track data in command mode supported? */
2371 cmdrtd = private->features.feature[9] & 0x20;
2372 cmdwtd = private->features.feature[12] & 0x40;
2373 use_prefix = private->features.feature[8] & 0x01;
2374
2375 cqr = NULL;
2376 if (cdlspecial || dasd_page_cache) {
2377 /* do nothing, just fall through to the cmd mode single case */
2378 } else if (!dasd_nofcx && tpm && (first_trk == last_trk)) {
2379 cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req,
2380 first_rec, last_rec,
2381 first_trk, last_trk,
2382 first_offs, last_offs,
2383 blk_per_trk, blksize);
2384 if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN)
2385 cqr = NULL;
2386 } else if (use_prefix &&
2387 (((rq_data_dir(req) == READ) && cmdrtd) ||
2388 ((rq_data_dir(req) == WRITE) && cmdwtd))) {
2389 cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req,
2390 first_rec, last_rec,
2391 first_trk, last_trk,
2392 first_offs, last_offs,
2393 blk_per_trk, blksize);
2394 if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN)
2395 cqr = NULL;
2396 }
2397 if (!cqr)
2398 cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req,
2399 first_rec, last_rec,
2400 first_trk, last_trk,
2401 first_offs, last_offs,
2402 blk_per_trk, blksize);
2403 return cqr;
2404}
2405
1da177e4
LT		 2406static int
2407dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req)
2408{
2409 struct dasd_eckd_private *private;
2410 struct ccw1 *ccw;
5705f702 2411 struct req_iterator iter;
1da177e4
LT		 2412 struct bio_vec *bv;
2413 char *dst, *cda;
2414 unsigned int blksize, blk_per_trk, off;
2415 sector_t recid;
5705f702 2416 int status;
1da177e4
LT		 2417
2418 if (!dasd_page_cache)
2419 goto out;
8e09f215
SW		 2420 private = (struct dasd_eckd_private *) cqr->block->base->private;
2421 blksize = cqr->block->bp_block;
1da177e4 2422 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
83096ebf 2423 recid = blk_rq_pos(req) >> cqr->block->s2b_shift;
1da177e4
LT		 2424 ccw = cqr->cpaddr;
2425 /* Skip over define extent & locate record. */
2426 ccw++;
2427 if (private->uses_cdl == 0 || recid > 2*blk_per_trk)
2428 ccw++;
5705f702 2429 rq_for_each_segment(bv, req, iter) {
1da177e4
LT		 2430 dst = page_address(bv->bv_page) + bv->bv_offset;
2431 for (off = 0; off < bv->bv_len; off += blksize) {
2432 /* Skip locate record. */
2433 if (private->uses_cdl && recid <= 2*blk_per_trk)
2434 ccw++;
2435 if (dst) {
2436 if (ccw->flags & CCW_FLAG_IDA)
2437 cda = *((char **)((addr_t) ccw->cda));
2438 else
2439 cda = (char *)((addr_t) ccw->cda);
2440 if (dst != cda) {
2441 if (rq_data_dir(req) == READ)
2442 memcpy(dst, cda, bv->bv_len);
2443 kmem_cache_free(dasd_page_cache,
2444 (void *)((addr_t)cda & PAGE_MASK));
2445 }
2446 dst = NULL;
2447 }
2448 ccw++;
2449 recid++;
2450 }
2451 }
2452out:
2453 status = cqr->status == DASD_CQR_DONE;
8e09f215 2454 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 2455 return status;
2456}
2457
8e09f215 2458/*
f3eb5384 2459 * Modify ccw/tcw in cqr so it can be started on a base device.
8e09f215
SW		 2460 *
2461 * Note that this is not enough to restart the cqr!
2462 * Either reset cqr->startdev as well (summary unit check handling)
2463 * or restart via separate cqr (as in ERP handling).
2464 */
2465void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr)
2466{
2467 struct ccw1 *ccw;
2468 struct PFX_eckd_data *pfxdata;
f3eb5384
SW		 2469 struct tcw *tcw;
2470 struct tccb *tccb;
2471 struct dcw *dcw;
2472
2473 if (cqr->cpmode == 1) {
2474 tcw = cqr->cpaddr;
2475 tccb = tcw_get_tccb(tcw);
2476 dcw = (struct dcw *)&tccb->tca[0];
2477 pfxdata = (struct PFX_eckd_data *)&dcw->cd[0];
8e09f215
SW		 2478 pfxdata->validity.verify_base = 0;
2479 pfxdata->validity.hyper_pav = 0;
f3eb5384
SW		 2480 } else {
2481 ccw = cqr->cpaddr;
2482 pfxdata = cqr->data;
2483 if (ccw->cmd_code == DASD_ECKD_CCW_PFX) {
2484 pfxdata->validity.verify_base = 0;
2485 pfxdata->validity.hyper_pav = 0;
2486 }
8e09f215
SW		 2487 }
2488}
2489
2490#define DASD_ECKD_CHANQ_MAX_SIZE 4
2491
2492static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base,
2493 struct dasd_block *block,
2494 struct request *req)
2495{
2496 struct dasd_eckd_private *private;
2497 struct dasd_device *startdev;
2498 unsigned long flags;
2499 struct dasd_ccw_req *cqr;
2500
2501 startdev = dasd_alias_get_start_dev(base);
2502 if (!startdev)
2503 startdev = base;
2504 private = (struct dasd_eckd_private *) startdev->private;
2505 if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE)
2506 return ERR_PTR(-EBUSY);
2507
2508 spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags);
2509 private->count++;
2510 cqr = dasd_eckd_build_cp(startdev, block, req);
2511 if (IS_ERR(cqr))
2512 private->count--;
2513 spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags);
2514 return cqr;
2515}
2516
2517static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr,
2518 struct request *req)
2519{
2520 struct dasd_eckd_private *private;
2521 unsigned long flags;
2522
2523 spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags);
2524 private = (struct dasd_eckd_private *) cqr->memdev->private;
2525 private->count--;
2526 spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags);
2527 return dasd_eckd_free_cp(cqr, req);
2528}
2529
1da177e4
LT		 2530static int
2531dasd_eckd_fill_info(struct dasd_device * device,
2532 struct dasd_information2_t * info)
2533{
2534 struct dasd_eckd_private *private;
2535
2536 private = (struct dasd_eckd_private *) device->private;
2537 info->label_block = 2;
2538 info->FBA_layout = private->uses_cdl ? 0 : 1;
2539 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL;
2540 info->characteristics_size = sizeof(struct dasd_eckd_characteristics);
2541 memcpy(info->characteristics, &private->rdc_data,
2542 sizeof(struct dasd_eckd_characteristics));
4abb08c2
SW		 2543 info->confdata_size = min((unsigned long)private->conf_len,
2544 sizeof(info->configuration_data));
2545 memcpy(info->configuration_data, private->conf_data,
2546 info->confdata_size);
1da177e4
LT		 2547 return 0;
2548}
2549
2550/*
2551 * SECTION: ioctl functions for eckd devices.
2552 */
2553
2554/*
2555 * Release device ioctl.
138c014d 2556 * Buils a channel programm to releases a prior reserved
1da177e4
LT		 2557 * (see dasd_eckd_reserve) device.
2558 */
2559static int
1107ccfb 2560dasd_eckd_release(struct dasd_device *device)
1da177e4 2561{
1da177e4
LT		 2562 struct dasd_ccw_req *cqr;
2563 int rc;
f3eb5384 2564 struct ccw1 *ccw;
1da177e4
LT		 2565
2566 if (!capable(CAP_SYS_ADMIN))
2567 return -EACCES;
2568
1da177e4
LT		 2569 cqr = dasd_smalloc_request(dasd_eckd_discipline.name,
2570 1, 32, device);
2571 if (IS_ERR(cqr)) {
fc19f381 2572 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 2573 "Could not allocate initialization request");
2574 return PTR_ERR(cqr);
2575 }
f3eb5384
SW		 2576 ccw = cqr->cpaddr;
2577 ccw->cmd_code = DASD_ECKD_CCW_RELEASE;
2578 ccw->flags |= CCW_FLAG_SLI;
2579 ccw->count = 32;
2580 ccw->cda = (__u32)(addr_t) cqr->data;
8e09f215
SW		 2581 cqr->startdev = device;
2582 cqr->memdev = device;
1da177e4 2583 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 2584 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
336c340b 2585 cqr->retries = 2; /* set retry counter to enable basic ERP */
1da177e4
LT		 2586 cqr->expires = 2 * HZ;
2587 cqr->buildclk = get_clock();
2588 cqr->status = DASD_CQR_FILLED;
2589
2590 rc = dasd_sleep_on_immediatly(cqr);
2591
8e09f215 2592 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 2593 return rc;
2594}
2595
2596/*
2597 * Reserve device ioctl.
2598 * Options are set to 'synchronous wait for interrupt' and
138c014d
HH		 2599 * 'timeout the request'. This leads to a terminate IO if
2600 * the interrupt is outstanding for a certain time.
1da177e4
LT		 2601 */
2602static int
1107ccfb 2603dasd_eckd_reserve(struct dasd_device *device)
1da177e4 2604{
1da177e4
LT		 2605 struct dasd_ccw_req *cqr;
2606 int rc;
f3eb5384 2607 struct ccw1 *ccw;
1da177e4
LT		 2608
2609 if (!capable(CAP_SYS_ADMIN))
2610 return -EACCES;
2611
1da177e4
LT		 2612 cqr = dasd_smalloc_request(dasd_eckd_discipline.name,
2613 1, 32, device);
2614 if (IS_ERR(cqr)) {
fc19f381 2615 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 2616 "Could not allocate initialization request");
2617 return PTR_ERR(cqr);
2618 }
f3eb5384
SW		 2619 ccw = cqr->cpaddr;
2620 ccw->cmd_code = DASD_ECKD_CCW_RESERVE;
2621 ccw->flags |= CCW_FLAG_SLI;
2622 ccw->count = 32;
2623 ccw->cda = (__u32)(addr_t) cqr->data;
8e09f215
SW		 2624 cqr->startdev = device;
2625 cqr->memdev = device;
1da177e4 2626 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 2627 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
336c340b 2628 cqr->retries = 2; /* set retry counter to enable basic ERP */
1da177e4
LT		 2629 cqr->expires = 2 * HZ;
2630 cqr->buildclk = get_clock();
2631 cqr->status = DASD_CQR_FILLED;
2632
2633 rc = dasd_sleep_on_immediatly(cqr);
2634
8e09f215 2635 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 2636 return rc;
2637}
2638
2639/*
2640 * Steal lock ioctl - unconditional reserve device.
138c014d 2641 * Buils a channel programm to break a device's reservation.
1da177e4
LT		 2642 * (unconditional reserve)
2643 */
2644static int
1107ccfb 2645dasd_eckd_steal_lock(struct dasd_device *device)
1da177e4 2646{
1da177e4
LT		 2647 struct dasd_ccw_req *cqr;
2648 int rc;
f3eb5384 2649 struct ccw1 *ccw;
1da177e4
LT		 2650
2651 if (!capable(CAP_SYS_ADMIN))
2652 return -EACCES;
2653
1da177e4
LT		 2654 cqr = dasd_smalloc_request(dasd_eckd_discipline.name,
2655 1, 32, device);
2656 if (IS_ERR(cqr)) {
fc19f381 2657 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 2658 "Could not allocate initialization request");
2659 return PTR_ERR(cqr);
2660 }
f3eb5384
SW		 2661 ccw = cqr->cpaddr;
2662 ccw->cmd_code = DASD_ECKD_CCW_SLCK;
2663 ccw->flags |= CCW_FLAG_SLI;
2664 ccw->count = 32;
2665 ccw->cda = (__u32)(addr_t) cqr->data;
8e09f215
SW		 2666 cqr->startdev = device;
2667 cqr->memdev = device;
1da177e4 2668 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 2669 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
336c340b 2670 cqr->retries = 2; /* set retry counter to enable basic ERP */
1da177e4
LT		 2671 cqr->expires = 2 * HZ;
2672 cqr->buildclk = get_clock();
2673 cqr->status = DASD_CQR_FILLED;
2674
2675 rc = dasd_sleep_on_immediatly(cqr);
2676
8e09f215 2677 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 2678 return rc;
2679}
2680
2681/*
2682 * Read performance statistics
2683 */
2684static int
1107ccfb 2685dasd_eckd_performance(struct dasd_device *device, void __user *argp)
1da177e4 2686{
1da177e4
LT		 2687 struct dasd_psf_prssd_data *prssdp;
2688 struct dasd_rssd_perf_stats_t *stats;
2689 struct dasd_ccw_req *cqr;
2690 struct ccw1 *ccw;
2691 int rc;
2692
1da177e4
LT		 2693 cqr = dasd_smalloc_request(dasd_eckd_discipline.name,
2694 1 /* PSF */ + 1 /* RSSD */ ,
8e09f215
SW		 2695 (sizeof(struct dasd_psf_prssd_data) +
2696 sizeof(struct dasd_rssd_perf_stats_t)),
1da177e4
LT		 2697 device);
2698 if (IS_ERR(cqr)) {
fc19f381 2699 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 2700 "Could not allocate initialization request");
2701 return PTR_ERR(cqr);
2702 }
8e09f215
SW		 2703 cqr->startdev = device;
2704 cqr->memdev = device;
1da177e4
LT		 2705 cqr->retries = 0;
2706 cqr->expires = 10 * HZ;
2707
2708 /* Prepare for Read Subsystem Data */
2709 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
8e09f215 2710 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
1da177e4 2711 prssdp->order = PSF_ORDER_PRSSD;
5d67d164 2712 prssdp->suborder = 0x01; /* Performance Statistics */
1da177e4
LT		 2713 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */
2714
2715 ccw = cqr->cpaddr;
2716 ccw->cmd_code = DASD_ECKD_CCW_PSF;
8e09f215 2717 ccw->count = sizeof(struct dasd_psf_prssd_data);
1da177e4
LT		 2718 ccw->flags |= CCW_FLAG_CC;
2719 ccw->cda = (__u32)(addr_t) prssdp;
2720
2721 /* Read Subsystem Data - Performance Statistics */
2722 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
8e09f215 2723 memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t));
1da177e4
LT		 2724
2725 ccw++;
2726 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
8e09f215 2727 ccw->count = sizeof(struct dasd_rssd_perf_stats_t);
1da177e4
LT		 2728 ccw->cda = (__u32)(addr_t) stats;
2729
2730 cqr->buildclk = get_clock();
2731 cqr->status = DASD_CQR_FILLED;
2732 rc = dasd_sleep_on(cqr);
2733 if (rc == 0) {
1da177e4
LT		 2734 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
2735 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
1107ccfb
CH		 2736 if (copy_to_user(argp, stats,
2737 sizeof(struct dasd_rssd_perf_stats_t)))
2738 rc = -EFAULT;
1da177e4 2739 }
8e09f215 2740 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 2741 return rc;
2742}
2743
2744/*
2745 * Get attributes (cache operations)
2746 * Returnes the cache attributes used in Define Extend (DE).
2747 */
2748static int
1107ccfb 2749dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp)
1da177e4 2750{
1107ccfb
CH		 2751 struct dasd_eckd_private *private =
2752 (struct dasd_eckd_private *)device->private;
2753 struct attrib_data_t attrib = private->attrib;
1da177e4
LT		 2754 int rc;
2755
2756 if (!capable(CAP_SYS_ADMIN))
2757 return -EACCES;
1107ccfb 2758 if (!argp)
1da177e4
LT		 2759 return -EINVAL;
2760
1107ccfb
CH		 2761 rc = 0;
2762 if (copy_to_user(argp, (long *) &attrib,
8e09f215 2763 sizeof(struct attrib_data_t)))
1107ccfb 2764 rc = -EFAULT;
1da177e4
LT		 2765
2766 return rc;
2767}
2768
2769/*
2770 * Set attributes (cache operations)
2771 * Stores the attributes for cache operation to be used in Define Extend (DE).
2772 */
2773static int
1107ccfb 2774dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp)
1da177e4 2775{
1107ccfb
CH		 2776 struct dasd_eckd_private *private =
2777 (struct dasd_eckd_private *)device->private;
1da177e4
LT		 2778 struct attrib_data_t attrib;
2779
2780 if (!capable(CAP_SYS_ADMIN))
2781 return -EACCES;
1107ccfb 2782 if (!argp)
1da177e4
LT		 2783 return -EINVAL;
2784
1107ccfb 2785 if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t)))
1da177e4 2786 return -EFAULT;
1da177e4
LT		 2787 private->attrib = attrib;
2788
fc19f381
SH		 2789 dev_info(&device->cdev->dev,
2790 "The DASD cache mode was set to %x (%i cylinder prestage)\n",
2791 private->attrib.operation, private->attrib.nr_cyl);
1da177e4
LT		 2792 return 0;
2793}
2794
ab1d848f
NH		 2795/*
2796 * Issue syscall I/O to EMC Symmetrix array.
2797 * CCWs are PSF and RSSD
2798 */
2799static int dasd_symm_io(struct dasd_device *device, void __user *argp)
2800{
2801 struct dasd_symmio_parms usrparm;
2802 char *psf_data, *rssd_result;
2803 struct dasd_ccw_req *cqr;
2804 struct ccw1 *ccw;
2805 int rc;
2806
2807 /* Copy parms from caller */
2808 rc = -EFAULT;
2809 if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
2810 goto out;
2811#ifndef CONFIG_64BIT
2812 /* Make sure pointers are sane even on 31 bit. */
2813 if ((usrparm.psf_data >> 32) != 0 || (usrparm.rssd_result >> 32) != 0) {
2814 rc = -EINVAL;
2815 goto out;
2816 }
2817#endif
2818 /* alloc I/O data area */
2819 psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA);
2820 rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA);
2821 if (!psf_data || !rssd_result) {
2822 rc = -ENOMEM;
2823 goto out_free;
2824 }
2825
2826 /* get syscall header from user space */
2827 rc = -EFAULT;
2828 if (copy_from_user(psf_data,
2829 (void __user *)(unsigned long) usrparm.psf_data,
2830 usrparm.psf_data_len))
2831 goto out_free;
2832
2833 /* sanity check on syscall header */
2834 if (psf_data[0] != 0x17 && psf_data[1] != 0xce) {
2835 rc = -EINVAL;
2836 goto out_free;
2837 }
2838
2839 /* setup CCWs for PSF + RSSD */
2840 cqr = dasd_smalloc_request("ECKD", 2 , 0, device);
2841 if (IS_ERR(cqr)) {
fc19f381 2842 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
ab1d848f
NH		 2843 "Could not allocate initialization request");
2844 rc = PTR_ERR(cqr);
2845 goto out_free;
2846 }
2847
2848 cqr->startdev = device;
2849 cqr->memdev = device;
2850 cqr->retries = 3;
2851 cqr->expires = 10 * HZ;
2852 cqr->buildclk = get_clock();
2853 cqr->status = DASD_CQR_FILLED;
2854
2855 /* Build the ccws */
2856 ccw = cqr->cpaddr;
2857
2858 /* PSF ccw */
2859 ccw->cmd_code = DASD_ECKD_CCW_PSF;
2860 ccw->count = usrparm.psf_data_len;
2861 ccw->flags |= CCW_FLAG_CC;
2862 ccw->cda = (__u32)(addr_t) psf_data;
2863
2864 ccw++;
2865
2866 /* RSSD ccw */
2867 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
2868 ccw->count = usrparm.rssd_result_len;
2869 ccw->flags = CCW_FLAG_SLI ;
2870 ccw->cda = (__u32)(addr_t) rssd_result;
2871
2872 rc = dasd_sleep_on(cqr);
2873 if (rc)
2874 goto out_sfree;
2875
2876 rc = -EFAULT;
2877 if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result,
2878 rssd_result, usrparm.rssd_result_len))
2879 goto out_sfree;
2880 rc = 0;
2881
2882out_sfree:
2883 dasd_sfree_request(cqr, cqr->memdev);
2884out_free:
2885 kfree(rssd_result);
2886 kfree(psf_data);
2887out:
2888 DBF_DEV_EVENT(DBF_WARNING, device, "Symmetrix ioctl: rc=%d", rc);
2889 return rc;
2890}
2891
1107ccfb 2892static int
8e09f215 2893dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp)
1107ccfb 2894{
8e09f215
SW		 2895 struct dasd_device *device = block->base;
2896
1107ccfb
CH		 2897 switch (cmd) {
2898 case BIODASDGATTR:
2899 return dasd_eckd_get_attrib(device, argp);
2900 case BIODASDSATTR:
2901 return dasd_eckd_set_attrib(device, argp);
2902 case BIODASDPSRD:
2903 return dasd_eckd_performance(device, argp);
2904 case BIODASDRLSE:
2905 return dasd_eckd_release(device);
2906 case BIODASDRSRV:
2907 return dasd_eckd_reserve(device);
2908 case BIODASDSLCK:
2909 return dasd_eckd_steal_lock(device);
ab1d848f
NH		 2910 case BIODASDSYMMIO:
2911 return dasd_symm_io(device, argp);
1107ccfb
CH		 2912 default:
2913 return -ENOIOCTLCMD;
2914 }
2915}
2916
445b5b49
HH		 2917/*
2918 * Dump the range of CCWs into 'page' buffer
2919 * and return number of printed chars.
2920 */
4d284cac 2921static int
445b5b49
HH		 2922dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page)
2923{
2924 int len, count;
2925 char *datap;
2926
2927 len = 0;
2928 while (from <= to) {
2929 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
2930 " CCW %p: %08X %08X DAT:",
2931 from, ((int *) from)[0], ((int *) from)[1]);
2932
2933 /* get pointer to data (consider IDALs) */
2934 if (from->flags & CCW_FLAG_IDA)
2935 datap = (char *) *((addr_t *) (addr_t) from->cda);
2936 else
2937 datap = (char *) ((addr_t) from->cda);
2938
2939 /* dump data (max 32 bytes) */
2940 for (count = 0; count < from->count && count < 32; count++) {
2941 if (count % 8 == 0) len += sprintf(page + len, " ");
2942 if (count % 4 == 0) len += sprintf(page + len, " ");
2943 len += sprintf(page + len, "%02x", datap[count]);
2944 }
2945 len += sprintf(page + len, "\n");
2946 from++;
2947 }
2948 return len;
2949}
2950
fc19f381
SH		 2951static void
2952dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct dasd_ccw_req *req,
2953 struct irb *irb, char *reason)
2954{
2955 u64 *sense;
2956 int sl;
2957 struct tsb *tsb;
2958
2959 sense = NULL;
2960 tsb = NULL;
2961 if (req && scsw_is_tm(&req->irb.scsw)) {
2962 if (irb->scsw.tm.tcw)
2963 tsb = tcw_get_tsb(
2964 (struct tcw *)(unsigned long)irb->scsw.tm.tcw);
2965 if (tsb && (irb->scsw.tm.fcxs == 0x01)) {
2966 switch (tsb->flags & 0x07) {
2967 case 1: /* tsa_iostat */
2968 sense = (u64 *)tsb->tsa.iostat.sense;
2969 break;
2970 case 2: /* ts_ddpc */
2971 sense = (u64 *)tsb->tsa.ddpc.sense;
2972 break;
2973 case 3: /* tsa_intrg */
2974 break;
2975 }
2976 }
2977 } else {
2978 if (irb->esw.esw0.erw.cons)
2979 sense = (u64 *)irb->ecw;
2980 }
2981 if (sense) {
2982 for (sl = 0; sl < 4; sl++) {
2983 DBF_DEV_EVENT(DBF_EMERG, device,
2984 "%s: %016llx %016llx %016llx %016llx",
2985 reason, sense[0], sense[1], sense[2],
2986 sense[3]);
2987 }
2988 } else {
2989 DBF_DEV_EVENT(DBF_EMERG, device, "%s",
2990 "SORRY - NO VALID SENSE AVAILABLE\n");
2991 }
2992}
2993
1da177e4
LT		 2994/*
2995 * Print sense data and related channel program.
2996 * Parts are printed because printk buffer is only 1024 bytes.
2997 */
f3eb5384 2998static void dasd_eckd_dump_sense_ccw(struct dasd_device *device,
8e09f215 2999 struct dasd_ccw_req *req, struct irb *irb)
1da177e4
LT		 3000{
3001 char *page;
445b5b49
HH		 3002 struct ccw1 *first, *last, *fail, *from, *to;
3003 int len, sl, sct;
1da177e4
LT		 3004
3005 page = (char *) get_zeroed_page(GFP_ATOMIC);
3006 if (page == NULL) {
fc19f381
SH		 3007 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
3008 "No memory to dump sense data\n");
1da177e4
LT		 3009 return;
3010 }
445b5b49
HH		 3011 /* dump the sense data */
3012 len = sprintf(page, KERN_ERR PRINTK_HEADER
1da177e4 3013 " I/O status report for device %s:\n",
2a0217d5 3014 dev_name(&device->cdev->dev));
1da177e4
LT		 3015 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3016 " in req: %p CS: 0x%02X DS: 0x%02X\n", req,
f3eb5384 3017 scsw_cstat(&irb->scsw), scsw_dstat(&irb->scsw));
1da177e4
LT		 3018 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3019 " device %s: Failing CCW: %p\n",
2a0217d5 3020 dev_name(&device->cdev->dev),
23d805b6 3021 (void *) (addr_t) irb->scsw.cmd.cpa);
1da177e4
LT		 3022 if (irb->esw.esw0.erw.cons) {
3023 for (sl = 0; sl < 4; sl++) {
3024 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3025 " Sense(hex) %2d-%2d:",
3026 (8 * sl), ((8 * sl) + 7));
3027
3028 for (sct = 0; sct < 8; sct++) {
3029 len += sprintf(page + len, " %02x",
3030 irb->ecw[8 * sl + sct]);
3031 }
3032 len += sprintf(page + len, "\n");
3033 }
3034
3035 if (irb->ecw[27] & DASD_SENSE_BIT_0) {
3036 /* 24 Byte Sense Data */
445b5b49
HH		 3037 sprintf(page + len, KERN_ERR PRINTK_HEADER
3038 " 24 Byte: %x MSG %x, "
3039 "%s MSGb to SYSOP\n",
3040 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f,
3041 irb->ecw[1] & 0x10 ? "" : "no");
1da177e4
LT		 3042 } else {
3043 /* 32 Byte Sense Data */
445b5b49
HH		 3044 sprintf(page + len, KERN_ERR PRINTK_HEADER
3045 " 32 Byte: Format: %x "
3046 "Exception class %x\n",
3047 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4);
1da177e4
LT		 3048 }
3049 } else {
445b5b49
HH		 3050 sprintf(page + len, KERN_ERR PRINTK_HEADER
3051 " SORRY - NO VALID SENSE AVAILABLE\n");
1da177e4 3052 }
445b5b49
HH		 3053 printk("%s", page);
3054
8e09f215
SW		 3055 if (req) {
3056 /* req == NULL for unsolicited interrupts */
3057 /* dump the Channel Program (max 140 Bytes per line) */
3058 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */
3059 first = req->cpaddr;
3060 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++);
3061 to = min(first + 6, last);
3062 len = sprintf(page, KERN_ERR PRINTK_HEADER
3063 " Related CP in req: %p\n", req);
3064 dasd_eckd_dump_ccw_range(first, to, page + len);
3065 printk("%s", page);
1da177e4 3066
8e09f215
SW		 3067 /* print failing CCW area (maximum 4) */
3068 /* scsw->cda is either valid or zero */
3069 len = 0;
3070 from = ++to;
23d805b6
PO		 3071 fail = (struct ccw1 *)(addr_t)
3072 irb->scsw.cmd.cpa; /* failing CCW */
8e09f215
SW		 3073 if (from < fail - 2) {
3074 from = fail - 2; /* there is a gap - print header */
3075 len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n");
3076 }
3077 to = min(fail + 1, last);
3078 len += dasd_eckd_dump_ccw_range(from, to, page + len);
3079
3080 /* print last CCWs (maximum 2) */
3081 from = max(from, ++to);
3082 if (from < last - 1) {
3083 from = last - 1; /* there is a gap - print header */
3084 len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n");
3085 }
3086 len += dasd_eckd_dump_ccw_range(from, last, page + len);
3087 if (len > 0)
3088 printk("%s", page);
1da177e4 3089 }
1da177e4
LT		 3090 free_page((unsigned long) page);
3091}
3092
f3eb5384
SW		 3093
3094/*
3095 * Print sense data from a tcw.
3096 */
3097static void dasd_eckd_dump_sense_tcw(struct dasd_device *device,
3098 struct dasd_ccw_req *req, struct irb *irb)
3099{
3100 char *page;
3101 int len, sl, sct, residual;
3102
3103 struct tsb *tsb;
3104 u8 *sense;
3105
3106
3107 page = (char *) get_zeroed_page(GFP_ATOMIC);
3108 if (page == NULL) {
fc19f381 3109 DBF_DEV_EVENT(DBF_WARNING, device, " %s",
f3eb5384
SW		 3110 "No memory to dump sense data");
3111 return;
3112 }
3113 /* dump the sense data */
3114 len = sprintf(page, KERN_ERR PRINTK_HEADER
3115 " I/O status report for device %s:\n",
3116 dev_name(&device->cdev->dev));
3117 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3118 " in req: %p CS: 0x%02X DS: 0x%02X "
3119 "fcxs: 0x%02X schxs: 0x%02X\n", req,
3120 scsw_cstat(&irb->scsw), scsw_dstat(&irb->scsw),
3121 irb->scsw.tm.fcxs, irb->scsw.tm.schxs);
3122 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3123 " device %s: Failing TCW: %p\n",
3124 dev_name(&device->cdev->dev),
3125 (void *) (addr_t) irb->scsw.tm.tcw);
3126
3127 tsb = NULL;
3128 sense = NULL;
3129 if (irb->scsw.tm.tcw)
3130 tsb = tcw_get_tsb(
3131 (struct tcw *)(unsigned long)irb->scsw.tm.tcw);
3132
3133 if (tsb && (irb->scsw.tm.fcxs == 0x01)) {
3134 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3135 " tsb->length %d\n", tsb->length);
3136 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3137 " tsb->flags %x\n", tsb->flags);
3138 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3139 " tsb->dcw_offset %d\n", tsb->dcw_offset);
3140 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3141 " tsb->count %d\n", tsb->count);
3142 residual = tsb->count - 28;
3143 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3144 " residual %d\n", residual);
3145
3146 switch (tsb->flags & 0x07) {
3147 case 1: /* tsa_iostat */
3148 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3149 " tsb->tsa.iostat.dev_time %d\n",
3150 tsb->tsa.iostat.dev_time);
3151 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3152 " tsb->tsa.iostat.def_time %d\n",
3153 tsb->tsa.iostat.def_time);
3154 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3155 " tsb->tsa.iostat.queue_time %d\n",
3156 tsb->tsa.iostat.queue_time);
3157 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3158 " tsb->tsa.iostat.dev_busy_time %d\n",
3159 tsb->tsa.iostat.dev_busy_time);
3160 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3161 " tsb->tsa.iostat.dev_act_time %d\n",
3162 tsb->tsa.iostat.dev_act_time);
3163 sense = tsb->tsa.iostat.sense;
3164 break;
3165 case 2: /* ts_ddpc */
3166 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3167 " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc);
3168 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3169 " tsb->tsa.ddpc.rcq: ");
3170 for (sl = 0; sl < 16; sl++) {
3171 for (sct = 0; sct < 8; sct++) {
3172 len += sprintf(page + len, " %02x",
3173 tsb->tsa.ddpc.rcq[sl]);
3174 }
3175 len += sprintf(page + len, "\n");
3176 }
3177 sense = tsb->tsa.ddpc.sense;
3178 break;
3179 case 3: /* tsa_intrg */
3180 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3181 " tsb->tsa.intrg.: not supportet yet \n");
3182 break;
3183 }
3184
3185 if (sense) {
3186 for (sl = 0; sl < 4; sl++) {
3187 len += sprintf(page + len,
3188 KERN_ERR PRINTK_HEADER
3189 " Sense(hex) %2d-%2d:",
3190 (8 * sl), ((8 * sl) + 7));
3191 for (sct = 0; sct < 8; sct++) {
3192 len += sprintf(page + len, " %02x",
3193 sense[8 * sl + sct]);
3194 }
3195 len += sprintf(page + len, "\n");
3196 }
3197
3198 if (sense[27] & DASD_SENSE_BIT_0) {
3199 /* 24 Byte Sense Data */
3200 sprintf(page + len, KERN_ERR PRINTK_HEADER
3201 " 24 Byte: %x MSG %x, "
3202 "%s MSGb to SYSOP\n",
3203 sense[7] >> 4, sense[7] & 0x0f,
3204 sense[1] & 0x10 ? "" : "no");
3205 } else {
3206 /* 32 Byte Sense Data */
3207 sprintf(page + len, KERN_ERR PRINTK_HEADER
3208 " 32 Byte: Format: %x "
3209 "Exception class %x\n",
3210 sense[6] & 0x0f, sense[22] >> 4);
3211 }
3212 } else {
3213 sprintf(page + len, KERN_ERR PRINTK_HEADER
3214 " SORRY - NO VALID SENSE AVAILABLE\n");
3215 }
3216 } else {
3217 sprintf(page + len, KERN_ERR PRINTK_HEADER
3218 " SORRY - NO TSB DATA AVAILABLE\n");
3219 }
3220 printk("%s", page);
3221 free_page((unsigned long) page);
3222}
3223
3224static void dasd_eckd_dump_sense(struct dasd_device *device,
3225 struct dasd_ccw_req *req, struct irb *irb)
3226{
3227 if (req && scsw_is_tm(&req->irb.scsw))
3228 dasd_eckd_dump_sense_tcw(device, req, irb);
3229 else
3230 dasd_eckd_dump_sense_ccw(device, req, irb);
3231}
3232
3233
1da177e4
LT		 3234/*
3235 * max_blocks is dependent on the amount of storage that is available
3236 * in the static io buffer for each device. Currently each device has
3237 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has
3238 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use
3239 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In
3240 * addition we have one define extent ccw + 16 bytes of data and one
3241 * locate record ccw + 16 bytes of data. That makes:
3242 * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum.
3243 * We want to fit two into the available memory so that we can immediately
3244 * start the next request if one finishes off. That makes 249.5 blocks
3245 * for one request. Give a little safety and the result is 240.
3246 */
3247static struct dasd_discipline dasd_eckd_discipline = {
3248 .owner = THIS_MODULE,
3249 .name = "ECKD",
3250 .ebcname = "ECKD",
3251 .max_blocks = 240,
3252 .check_device = dasd_eckd_check_characteristics,
8e09f215 3253 .uncheck_device = dasd_eckd_uncheck_device,
1da177e4 3254 .do_analysis = dasd_eckd_do_analysis,
8e09f215
SW		 3255 .ready_to_online = dasd_eckd_ready_to_online,
3256 .online_to_ready = dasd_eckd_online_to_ready,
1da177e4
LT		 3257 .fill_geometry = dasd_eckd_fill_geometry,
3258 .start_IO = dasd_start_IO,
3259 .term_IO = dasd_term_IO,
8e09f215 3260 .handle_terminated_request = dasd_eckd_handle_terminated_request,
1da177e4 3261 .format_device = dasd_eckd_format_device,
1da177e4
LT		 3262 .erp_action = dasd_eckd_erp_action,
3263 .erp_postaction = dasd_eckd_erp_postaction,
8e09f215
SW		 3264 .handle_unsolicited_interrupt = dasd_eckd_handle_unsolicited_interrupt,
3265 .build_cp = dasd_eckd_build_alias_cp,
3266 .free_cp = dasd_eckd_free_alias_cp,
1da177e4 3267 .dump_sense = dasd_eckd_dump_sense,
fc19f381 3268 .dump_sense_dbf = dasd_eckd_dump_sense_dbf,
1da177e4 3269 .fill_info = dasd_eckd_fill_info,
1107ccfb 3270 .ioctl = dasd_eckd_ioctl,
1da177e4
LT		 3271};
3272
3273static int __init
3274dasd_eckd_init(void)
3275{
1da177e4 3276 ASCEBC(dasd_eckd_discipline.ebcname, 4);
40545573 3277 return ccw_driver_register(&dasd_eckd_driver);
1da177e4
LT		 3278}
3279
3280static void __exit
3281dasd_eckd_cleanup(void)
3282{
3283 ccw_driver_unregister(&dasd_eckd_driver);
1da177e4
LT		 3284}
3285
3286module_init(dasd_eckd_init);
3287module_exit(dasd_eckd_cleanup);
Linux 6.x block layer and io_uring tree(s)