Commit | Line | Data |
---|---|---|
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 | |
9 | * | |
1da177e4 LT |
10 | */ |
11 | ||
1da177e4 LT |
12 | #include <linux/stddef.h> |
13 | #include <linux/kernel.h> | |
14 | #include <linux/slab.h> | |
15 | #include <linux/hdreg.h> /* HDIO_GETGEO */ | |
16 | #include <linux/bio.h> | |
17 | #include <linux/module.h> | |
18 | #include <linux/init.h> | |
19 | ||
20 | #include <asm/debug.h> | |
21 | #include <asm/idals.h> | |
22 | #include <asm/ebcdic.h> | |
23 | #include <asm/io.h> | |
24 | #include <asm/todclk.h> | |
25 | #include <asm/uaccess.h> | |
40545573 | 26 | #include <asm/cio.h> |
1da177e4 LT |
27 | #include <asm/ccwdev.h> |
28 | ||
29 | #include "dasd_int.h" | |
30 | #include "dasd_eckd.h" | |
31 | ||
32 | #ifdef PRINTK_HEADER | |
33 | #undef PRINTK_HEADER | |
34 | #endif /* PRINTK_HEADER */ | |
35 | #define PRINTK_HEADER "dasd(eckd):" | |
36 | ||
37 | #define ECKD_C0(i) (i->home_bytes) | |
38 | #define ECKD_F(i) (i->formula) | |
39 | #define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\ | |
40 | (i->factors.f_0x02.f1)) | |
41 | #define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\ | |
42 | (i->factors.f_0x02.f2)) | |
43 | #define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\ | |
44 | (i->factors.f_0x02.f3)) | |
45 | #define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0) | |
46 | #define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0) | |
47 | #define ECKD_F6(i) (i->factor6) | |
48 | #define ECKD_F7(i) (i->factor7) | |
49 | #define ECKD_F8(i) (i->factor8) | |
50 | ||
51 | MODULE_LICENSE("GPL"); | |
52 | ||
53 | static struct dasd_discipline dasd_eckd_discipline; | |
54 | ||
55 | struct dasd_eckd_private { | |
56 | struct dasd_eckd_characteristics rdc_data; | |
57 | struct dasd_eckd_confdata conf_data; | |
58 | struct dasd_eckd_path path_data; | |
59 | struct eckd_count count_area[5]; | |
60 | int init_cqr_status; | |
61 | int uses_cdl; | |
62 | struct attrib_data_t attrib; /* e.g. cache operations */ | |
63 | }; | |
64 | ||
65 | /* The ccw bus type uses this table to find devices that it sends to | |
66 | * dasd_eckd_probe */ | |
67 | static struct ccw_device_id dasd_eckd_ids[] = { | |
d2c993d8 HC |
68 | { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1}, |
69 | { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2}, | |
70 | { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3390, 0), .driver_info = 0x3}, | |
71 | { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4}, | |
72 | { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5}, | |
73 | { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6}, | |
74 | { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7}, | |
75 | { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8}, | |
76 | { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9}, | |
77 | { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa}, | |
1da177e4 LT |
78 | { /* end of list */ }, |
79 | }; | |
80 | ||
81 | MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids); | |
82 | ||
83 | static struct ccw_driver dasd_eckd_driver; /* see below */ | |
84 | ||
85 | /* initial attempt at a probe function. this can be simplified once | |
86 | * the other detection code is gone */ | |
87 | static int | |
88 | dasd_eckd_probe (struct ccw_device *cdev) | |
89 | { | |
90 | int ret; | |
91 | ||
40545573 HH |
92 | /* set ECKD specific ccw-device options */ |
93 | ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE); | |
94 | if (ret) { | |
95 | printk(KERN_WARNING | |
96 | "dasd_eckd_probe: could not set ccw-device options " | |
97 | "for %s\n", cdev->dev.bus_id); | |
1da177e4 | 98 | return ret; |
40545573 HH |
99 | } |
100 | ret = dasd_generic_probe(cdev, &dasd_eckd_discipline); | |
101 | return ret; | |
1da177e4 LT |
102 | } |
103 | ||
104 | static int | |
105 | dasd_eckd_set_online(struct ccw_device *cdev) | |
106 | { | |
40545573 | 107 | return dasd_generic_set_online(cdev, &dasd_eckd_discipline); |
1da177e4 LT |
108 | } |
109 | ||
110 | static struct ccw_driver dasd_eckd_driver = { | |
111 | .name = "dasd-eckd", | |
112 | .owner = THIS_MODULE, | |
113 | .ids = dasd_eckd_ids, | |
114 | .probe = dasd_eckd_probe, | |
115 | .remove = dasd_generic_remove, | |
116 | .set_offline = dasd_generic_set_offline, | |
117 | .set_online = dasd_eckd_set_online, | |
118 | .notify = dasd_generic_notify, | |
119 | }; | |
120 | ||
121 | static const int sizes_trk0[] = { 28, 148, 84 }; | |
122 | #define LABEL_SIZE 140 | |
123 | ||
124 | static inline unsigned int | |
125 | round_up_multiple(unsigned int no, unsigned int mult) | |
126 | { | |
127 | int rem = no % mult; | |
128 | return (rem ? no - rem + mult : no); | |
129 | } | |
130 | ||
131 | static inline unsigned int | |
132 | ceil_quot(unsigned int d1, unsigned int d2) | |
133 | { | |
134 | return (d1 + (d2 - 1)) / d2; | |
135 | } | |
136 | ||
4d284cac | 137 | static unsigned int |
1da177e4 LT |
138 | recs_per_track(struct dasd_eckd_characteristics * rdc, |
139 | unsigned int kl, unsigned int dl) | |
140 | { | |
141 | int dn, kn; | |
142 | ||
143 | switch (rdc->dev_type) { | |
144 | case 0x3380: | |
145 | if (kl) | |
146 | return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + | |
147 | ceil_quot(dl + 12, 32)); | |
148 | else | |
149 | return 1499 / (15 + ceil_quot(dl + 12, 32)); | |
150 | case 0x3390: | |
151 | dn = ceil_quot(dl + 6, 232) + 1; | |
152 | if (kl) { | |
153 | kn = ceil_quot(kl + 6, 232) + 1; | |
154 | return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + | |
155 | 9 + ceil_quot(dl + 6 * dn, 34)); | |
156 | } else | |
157 | return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); | |
158 | case 0x9345: | |
159 | dn = ceil_quot(dl + 6, 232) + 1; | |
160 | if (kl) { | |
161 | kn = ceil_quot(kl + 6, 232) + 1; | |
162 | return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + | |
163 | ceil_quot(dl + 6 * dn, 34)); | |
164 | } else | |
165 | return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); | |
166 | } | |
167 | return 0; | |
168 | } | |
169 | ||
4d284cac | 170 | static int |
1da177e4 LT |
171 | check_XRC (struct ccw1 *de_ccw, |
172 | struct DE_eckd_data *data, | |
173 | struct dasd_device *device) | |
174 | { | |
175 | struct dasd_eckd_private *private; | |
d54853ef | 176 | int rc; |
1da177e4 LT |
177 | |
178 | private = (struct dasd_eckd_private *) device->private; | |
d54853ef MS |
179 | if (!private->rdc_data.facilities.XRC_supported) |
180 | return 0; | |
1da177e4 LT |
181 | |
182 | /* switch on System Time Stamp - needed for XRC Support */ | |
d54853ef MS |
183 | data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ |
184 | data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ | |
1da177e4 | 185 | |
d54853ef MS |
186 | rc = get_sync_clock(&data->ep_sys_time); |
187 | /* Ignore return code if sync clock is switched off. */ | |
188 | if (rc == -ENOSYS || rc == -EACCES) | |
189 | rc = 0; | |
1da177e4 | 190 | |
d54853ef MS |
191 | de_ccw->count = sizeof (struct DE_eckd_data); |
192 | de_ccw->flags |= CCW_FLAG_SLI; | |
193 | return rc; | |
194 | } | |
1da177e4 | 195 | |
4d284cac | 196 | static int |
1da177e4 LT |
197 | define_extent(struct ccw1 * ccw, struct DE_eckd_data * data, int trk, |
198 | int totrk, int cmd, struct dasd_device * device) | |
199 | { | |
200 | struct dasd_eckd_private *private; | |
201 | struct ch_t geo, beg, end; | |
d54853ef | 202 | int rc = 0; |
1da177e4 LT |
203 | |
204 | private = (struct dasd_eckd_private *) device->private; | |
205 | ||
206 | ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; | |
207 | ccw->flags = 0; | |
208 | ccw->count = 16; | |
209 | ccw->cda = (__u32) __pa(data); | |
210 | ||
211 | memset(data, 0, sizeof (struct DE_eckd_data)); | |
212 | switch (cmd) { | |
213 | case DASD_ECKD_CCW_READ_HOME_ADDRESS: | |
214 | case DASD_ECKD_CCW_READ_RECORD_ZERO: | |
215 | case DASD_ECKD_CCW_READ: | |
216 | case DASD_ECKD_CCW_READ_MT: | |
217 | case DASD_ECKD_CCW_READ_CKD: | |
218 | case DASD_ECKD_CCW_READ_CKD_MT: | |
219 | case DASD_ECKD_CCW_READ_KD: | |
220 | case DASD_ECKD_CCW_READ_KD_MT: | |
221 | case DASD_ECKD_CCW_READ_COUNT: | |
222 | data->mask.perm = 0x1; | |
223 | data->attributes.operation = private->attrib.operation; | |
224 | break; | |
225 | case DASD_ECKD_CCW_WRITE: | |
226 | case DASD_ECKD_CCW_WRITE_MT: | |
227 | case DASD_ECKD_CCW_WRITE_KD: | |
228 | case DASD_ECKD_CCW_WRITE_KD_MT: | |
229 | data->mask.perm = 0x02; | |
230 | data->attributes.operation = private->attrib.operation; | |
d54853ef | 231 | rc = check_XRC (ccw, data, device); |
1da177e4 LT |
232 | break; |
233 | case DASD_ECKD_CCW_WRITE_CKD: | |
234 | case DASD_ECKD_CCW_WRITE_CKD_MT: | |
235 | data->attributes.operation = DASD_BYPASS_CACHE; | |
d54853ef | 236 | rc = check_XRC (ccw, data, device); |
1da177e4 LT |
237 | break; |
238 | case DASD_ECKD_CCW_ERASE: | |
239 | case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: | |
240 | case DASD_ECKD_CCW_WRITE_RECORD_ZERO: | |
241 | data->mask.perm = 0x3; | |
242 | data->mask.auth = 0x1; | |
243 | data->attributes.operation = DASD_BYPASS_CACHE; | |
d54853ef | 244 | rc = check_XRC (ccw, data, device); |
1da177e4 LT |
245 | break; |
246 | default: | |
247 | DEV_MESSAGE(KERN_ERR, device, "unknown opcode 0x%x", cmd); | |
248 | break; | |
249 | } | |
250 | ||
251 | data->attributes.mode = 0x3; /* ECKD */ | |
252 | ||
253 | if ((private->rdc_data.cu_type == 0x2105 || | |
254 | private->rdc_data.cu_type == 0x2107 || | |
255 | private->rdc_data.cu_type == 0x1750) | |
256 | && !(private->uses_cdl && trk < 2)) | |
257 | data->ga_extended |= 0x40; /* Regular Data Format Mode */ | |
258 | ||
259 | geo.cyl = private->rdc_data.no_cyl; | |
260 | geo.head = private->rdc_data.trk_per_cyl; | |
261 | beg.cyl = trk / geo.head; | |
262 | beg.head = trk % geo.head; | |
263 | end.cyl = totrk / geo.head; | |
264 | end.head = totrk % geo.head; | |
265 | ||
266 | /* check for sequential prestage - enhance cylinder range */ | |
267 | if (data->attributes.operation == DASD_SEQ_PRESTAGE || | |
268 | data->attributes.operation == DASD_SEQ_ACCESS) { | |
138c014d HH |
269 | |
270 | if (end.cyl + private->attrib.nr_cyl < geo.cyl) | |
1da177e4 LT |
271 | end.cyl += private->attrib.nr_cyl; |
272 | else | |
273 | end.cyl = (geo.cyl - 1); | |
274 | } | |
275 | ||
276 | data->beg_ext.cyl = beg.cyl; | |
277 | data->beg_ext.head = beg.head; | |
278 | data->end_ext.cyl = end.cyl; | |
279 | data->end_ext.head = end.head; | |
d54853ef | 280 | return rc; |
1da177e4 LT |
281 | } |
282 | ||
4d284cac | 283 | static void |
1da177e4 LT |
284 | locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, int trk, |
285 | int rec_on_trk, int no_rec, int cmd, | |
286 | struct dasd_device * device, int reclen) | |
287 | { | |
288 | struct dasd_eckd_private *private; | |
289 | int sector; | |
290 | int dn, d; | |
138c014d | 291 | |
1da177e4 LT |
292 | private = (struct dasd_eckd_private *) device->private; |
293 | ||
294 | DBF_DEV_EVENT(DBF_INFO, device, | |
295 | "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", | |
296 | trk, rec_on_trk, no_rec, cmd, reclen); | |
297 | ||
298 | ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; | |
299 | ccw->flags = 0; | |
300 | ccw->count = 16; | |
301 | ccw->cda = (__u32) __pa(data); | |
302 | ||
303 | memset(data, 0, sizeof (struct LO_eckd_data)); | |
304 | sector = 0; | |
305 | if (rec_on_trk) { | |
306 | switch (private->rdc_data.dev_type) { | |
307 | case 0x3390: | |
308 | dn = ceil_quot(reclen + 6, 232); | |
309 | d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); | |
310 | sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; | |
311 | break; | |
312 | case 0x3380: | |
313 | d = 7 + ceil_quot(reclen + 12, 32); | |
314 | sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; | |
315 | break; | |
316 | } | |
317 | } | |
318 | data->sector = sector; | |
319 | data->count = no_rec; | |
320 | switch (cmd) { | |
321 | case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: | |
322 | data->operation.orientation = 0x3; | |
323 | data->operation.operation = 0x03; | |
324 | break; | |
325 | case DASD_ECKD_CCW_READ_HOME_ADDRESS: | |
326 | data->operation.orientation = 0x3; | |
327 | data->operation.operation = 0x16; | |
328 | break; | |
329 | case DASD_ECKD_CCW_WRITE_RECORD_ZERO: | |
330 | data->operation.orientation = 0x1; | |
331 | data->operation.operation = 0x03; | |
332 | data->count++; | |
333 | break; | |
334 | case DASD_ECKD_CCW_READ_RECORD_ZERO: | |
335 | data->operation.orientation = 0x3; | |
336 | data->operation.operation = 0x16; | |
337 | data->count++; | |
338 | break; | |
339 | case DASD_ECKD_CCW_WRITE: | |
340 | case DASD_ECKD_CCW_WRITE_MT: | |
341 | case DASD_ECKD_CCW_WRITE_KD: | |
342 | case DASD_ECKD_CCW_WRITE_KD_MT: | |
343 | data->auxiliary.last_bytes_used = 0x1; | |
344 | data->length = reclen; | |
345 | data->operation.operation = 0x01; | |
346 | break; | |
347 | case DASD_ECKD_CCW_WRITE_CKD: | |
348 | case DASD_ECKD_CCW_WRITE_CKD_MT: | |
349 | data->auxiliary.last_bytes_used = 0x1; | |
350 | data->length = reclen; | |
351 | data->operation.operation = 0x03; | |
352 | break; | |
353 | case DASD_ECKD_CCW_READ: | |
354 | case DASD_ECKD_CCW_READ_MT: | |
355 | case DASD_ECKD_CCW_READ_KD: | |
356 | case DASD_ECKD_CCW_READ_KD_MT: | |
357 | data->auxiliary.last_bytes_used = 0x1; | |
358 | data->length = reclen; | |
359 | data->operation.operation = 0x06; | |
360 | break; | |
361 | case DASD_ECKD_CCW_READ_CKD: | |
362 | case DASD_ECKD_CCW_READ_CKD_MT: | |
363 | data->auxiliary.last_bytes_used = 0x1; | |
364 | data->length = reclen; | |
365 | data->operation.operation = 0x16; | |
366 | break; | |
367 | case DASD_ECKD_CCW_READ_COUNT: | |
368 | data->operation.operation = 0x06; | |
369 | break; | |
370 | case DASD_ECKD_CCW_ERASE: | |
371 | data->length = reclen; | |
372 | data->auxiliary.last_bytes_used = 0x1; | |
373 | data->operation.operation = 0x0b; | |
374 | break; | |
375 | default: | |
376 | DEV_MESSAGE(KERN_ERR, device, "unknown opcode 0x%x", cmd); | |
377 | } | |
378 | data->seek_addr.cyl = data->search_arg.cyl = | |
379 | trk / private->rdc_data.trk_per_cyl; | |
380 | data->seek_addr.head = data->search_arg.head = | |
381 | trk % private->rdc_data.trk_per_cyl; | |
382 | data->search_arg.record = rec_on_trk; | |
383 | } | |
384 | ||
385 | /* | |
386 | * Returns 1 if the block is one of the special blocks that needs | |
387 | * to get read/written with the KD variant of the command. | |
388 | * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and | |
389 | * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. | |
390 | * Luckily the KD variants differ only by one bit (0x08) from the | |
391 | * normal variant. So don't wonder about code like: | |
392 | * if (dasd_eckd_cdl_special(blk_per_trk, recid)) | |
393 | * ccw->cmd_code |= 0x8; | |
394 | */ | |
395 | static inline int | |
396 | dasd_eckd_cdl_special(int blk_per_trk, int recid) | |
397 | { | |
398 | if (recid < 3) | |
399 | return 1; | |
400 | if (recid < blk_per_trk) | |
401 | return 0; | |
402 | if (recid < 2 * blk_per_trk) | |
403 | return 1; | |
404 | return 0; | |
405 | } | |
406 | ||
407 | /* | |
408 | * Returns the record size for the special blocks of the cdl format. | |
409 | * Only returns something useful if dasd_eckd_cdl_special is true | |
410 | * for the recid. | |
411 | */ | |
412 | static inline int | |
413 | dasd_eckd_cdl_reclen(int recid) | |
414 | { | |
415 | if (recid < 3) | |
416 | return sizes_trk0[recid]; | |
417 | return LABEL_SIZE; | |
418 | } | |
419 | ||
3d052595 HH |
420 | /* |
421 | * Generate device unique id that specifies the physical device. | |
422 | */ | |
423 | static int | |
424 | dasd_eckd_generate_uid(struct dasd_device *device, struct dasd_uid *uid) | |
425 | { | |
426 | struct dasd_eckd_private *private; | |
427 | struct dasd_eckd_confdata *confdata; | |
428 | ||
429 | private = (struct dasd_eckd_private *) device->private; | |
430 | if (!private) | |
431 | return -ENODEV; | |
432 | confdata = &private->conf_data; | |
433 | if (!confdata) | |
434 | return -ENODEV; | |
435 | ||
436 | memset(uid, 0, sizeof(struct dasd_uid)); | |
d0710c7c HH |
437 | memcpy(uid->vendor, confdata->ned1.HDA_manufacturer, |
438 | sizeof(uid->vendor) - 1); | |
3d052595 | 439 | EBCASC(uid->vendor, sizeof(uid->vendor) - 1); |
d0710c7c HH |
440 | memcpy(uid->serial, confdata->ned1.HDA_location, |
441 | sizeof(uid->serial) - 1); | |
3d052595 HH |
442 | EBCASC(uid->serial, sizeof(uid->serial) - 1); |
443 | uid->ssid = confdata->neq.subsystemID; | |
444 | if (confdata->ned2.sneq.flags == 0x40) { | |
445 | uid->alias = 1; | |
446 | uid->unit_addr = confdata->ned2.sneq.base_unit_addr; | |
447 | } else | |
448 | uid->unit_addr = confdata->ned1.unit_addr; | |
449 | ||
450 | return 0; | |
451 | } | |
452 | ||
763968e2 HC |
453 | static struct dasd_ccw_req *dasd_eckd_build_rcd_lpm(struct dasd_device *device, |
454 | void *rcd_buffer, | |
455 | struct ciw *ciw, __u8 lpm) | |
17283b56 CH |
456 | { |
457 | struct dasd_ccw_req *cqr; | |
458 | struct ccw1 *ccw; | |
459 | ||
460 | cqr = dasd_smalloc_request("ECKD", 1 /* RCD */, ciw->count, device); | |
461 | ||
462 | if (IS_ERR(cqr)) { | |
463 | DEV_MESSAGE(KERN_WARNING, device, "%s", | |
464 | "Could not allocate RCD request"); | |
465 | return cqr; | |
466 | } | |
467 | ||
468 | ccw = cqr->cpaddr; | |
469 | ccw->cmd_code = ciw->cmd; | |
470 | ccw->cda = (__u32)(addr_t)rcd_buffer; | |
471 | ccw->count = ciw->count; | |
472 | ||
473 | cqr->device = device; | |
474 | cqr->expires = 10*HZ; | |
475 | cqr->lpm = lpm; | |
476 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); | |
477 | cqr->retries = 2; | |
478 | cqr->buildclk = get_clock(); | |
479 | cqr->status = DASD_CQR_FILLED; | |
480 | return cqr; | |
481 | } | |
482 | ||
483 | static int dasd_eckd_read_conf_lpm(struct dasd_device *device, | |
484 | void **rcd_buffer, | |
485 | int *rcd_buffer_size, __u8 lpm) | |
486 | { | |
487 | struct ciw *ciw; | |
488 | char *rcd_buf = NULL; | |
489 | int ret; | |
490 | struct dasd_ccw_req *cqr; | |
491 | ||
492 | /* | |
493 | * scan for RCD command in extended SenseID data | |
494 | */ | |
495 | ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); | |
496 | if (!ciw || ciw->cmd == 0) { | |
497 | ret = -EOPNOTSUPP; | |
498 | goto out_error; | |
499 | } | |
500 | rcd_buf = kzalloc(ciw->count, GFP_KERNEL | GFP_DMA); | |
501 | if (!rcd_buf) { | |
502 | ret = -ENOMEM; | |
503 | goto out_error; | |
504 | } | |
505 | cqr = dasd_eckd_build_rcd_lpm(device, rcd_buf, ciw, lpm); | |
506 | if (IS_ERR(cqr)) { | |
507 | ret = PTR_ERR(cqr); | |
508 | goto out_error; | |
509 | } | |
510 | ret = dasd_sleep_on(cqr); | |
511 | /* | |
512 | * on success we update the user input parms | |
513 | */ | |
514 | dasd_sfree_request(cqr, cqr->device); | |
515 | if (ret) | |
516 | goto out_error; | |
517 | ||
518 | *rcd_buffer_size = ciw->count; | |
519 | *rcd_buffer = rcd_buf; | |
520 | return 0; | |
521 | out_error: | |
522 | kfree(rcd_buf); | |
523 | *rcd_buffer = NULL; | |
524 | *rcd_buffer_size = 0; | |
525 | return ret; | |
526 | } | |
527 | ||
1da177e4 LT |
528 | static int |
529 | dasd_eckd_read_conf(struct dasd_device *device) | |
530 | { | |
531 | void *conf_data; | |
532 | int conf_len, conf_data_saved; | |
533 | int rc; | |
534 | __u8 lpm; | |
535 | struct dasd_eckd_private *private; | |
536 | struct dasd_eckd_path *path_data; | |
537 | ||
538 | private = (struct dasd_eckd_private *) device->private; | |
539 | path_data = (struct dasd_eckd_path *) &private->path_data; | |
540 | path_data->opm = ccw_device_get_path_mask(device->cdev); | |
541 | lpm = 0x80; | |
542 | conf_data_saved = 0; | |
543 | ||
544 | /* get configuration data per operational path */ | |
545 | for (lpm = 0x80; lpm; lpm>>= 1) { | |
546 | if (lpm & path_data->opm){ | |
17283b56 CH |
547 | rc = dasd_eckd_read_conf_lpm(device, &conf_data, |
548 | &conf_len, lpm); | |
1da177e4 LT |
549 | if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ |
550 | MESSAGE(KERN_WARNING, | |
551 | "Read configuration data returned " | |
552 | "error %d", rc); | |
553 | return rc; | |
554 | } | |
555 | if (conf_data == NULL) { | |
556 | MESSAGE(KERN_WARNING, "%s", "No configuration " | |
557 | "data retrieved"); | |
d133a960 | 558 | continue; /* no error */ |
1da177e4 LT |
559 | } |
560 | if (conf_len != sizeof (struct dasd_eckd_confdata)) { | |
561 | MESSAGE(KERN_WARNING, | |
562 | "sizes of configuration data mismatch" | |
563 | "%d (read) vs %ld (expected)", | |
564 | conf_len, | |
565 | sizeof (struct dasd_eckd_confdata)); | |
566 | kfree(conf_data); | |
d133a960 | 567 | continue; /* no error */ |
1da177e4 LT |
568 | } |
569 | /* save first valid configuration data */ | |
570 | if (!conf_data_saved){ | |
571 | memcpy(&private->conf_data, conf_data, | |
572 | sizeof (struct dasd_eckd_confdata)); | |
573 | conf_data_saved++; | |
574 | } | |
575 | switch (((char *)conf_data)[242] & 0x07){ | |
576 | case 0x02: | |
577 | path_data->npm |= lpm; | |
578 | break; | |
579 | case 0x03: | |
580 | path_data->ppm |= lpm; | |
581 | break; | |
582 | } | |
583 | kfree(conf_data); | |
584 | } | |
585 | } | |
586 | return 0; | |
587 | } | |
588 | ||
40545573 HH |
589 | /* |
590 | * Build CP for Perform Subsystem Function - SSC. | |
591 | */ | |
2b67fc46 | 592 | static struct dasd_ccw_req * |
40545573 HH |
593 | dasd_eckd_build_psf_ssc(struct dasd_device *device) |
594 | { | |
595 | struct dasd_ccw_req *cqr; | |
596 | struct dasd_psf_ssc_data *psf_ssc_data; | |
597 | struct ccw1 *ccw; | |
598 | ||
599 | cqr = dasd_smalloc_request("ECKD", 1 /* PSF */ , | |
600 | sizeof(struct dasd_psf_ssc_data), | |
601 | device); | |
602 | ||
603 | if (IS_ERR(cqr)) { | |
604 | DEV_MESSAGE(KERN_WARNING, device, "%s", | |
605 | "Could not allocate PSF-SSC request"); | |
606 | return cqr; | |
607 | } | |
608 | psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; | |
609 | psf_ssc_data->order = PSF_ORDER_SSC; | |
610 | psf_ssc_data->suborder = 0x08; | |
611 | ||
612 | ccw = cqr->cpaddr; | |
613 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
614 | ccw->cda = (__u32)(addr_t)psf_ssc_data; | |
615 | ccw->count = 66; | |
616 | ||
617 | cqr->device = device; | |
618 | cqr->expires = 10*HZ; | |
619 | cqr->buildclk = get_clock(); | |
620 | cqr->status = DASD_CQR_FILLED; | |
621 | return cqr; | |
622 | } | |
623 | ||
624 | /* | |
625 | * Perform Subsystem Function. | |
626 | * It is necessary to trigger CIO for channel revalidation since this | |
627 | * call might change behaviour of DASD devices. | |
628 | */ | |
629 | static int | |
630 | dasd_eckd_psf_ssc(struct dasd_device *device) | |
631 | { | |
632 | struct dasd_ccw_req *cqr; | |
633 | int rc; | |
634 | ||
635 | cqr = dasd_eckd_build_psf_ssc(device); | |
636 | if (IS_ERR(cqr)) | |
637 | return PTR_ERR(cqr); | |
638 | ||
639 | rc = dasd_sleep_on(cqr); | |
640 | if (!rc) | |
641 | /* trigger CIO to reprobe devices */ | |
642 | css_schedule_reprobe(); | |
643 | dasd_sfree_request(cqr, cqr->device); | |
644 | return rc; | |
645 | } | |
646 | ||
647 | /* | |
648 | * Valide storage server of current device. | |
649 | */ | |
650 | static int | |
8e79a441 | 651 | dasd_eckd_validate_server(struct dasd_device *device, struct dasd_uid *uid) |
40545573 HH |
652 | { |
653 | int rc; | |
654 | ||
655 | /* Currently PAV is the only reason to 'validate' server on LPAR */ | |
656 | if (dasd_nopav || MACHINE_IS_VM) | |
657 | return 0; | |
658 | ||
659 | rc = dasd_eckd_psf_ssc(device); | |
8e79a441 HH |
660 | /* may be requested feature is not available on server, |
661 | * therefore just report error and go ahead */ | |
662 | DEV_MESSAGE(KERN_INFO, device, | |
663 | "PSF-SSC on storage subsystem %s.%s.%04x returned rc=%d", | |
664 | uid->vendor, uid->serial, uid->ssid, rc); | |
40545573 HH |
665 | /* RE-Read Configuration Data */ |
666 | return dasd_eckd_read_conf(device); | |
667 | } | |
668 | ||
3d052595 HH |
669 | /* |
670 | * Check device characteristics. | |
671 | * If the device is accessible using ECKD discipline, the device is enabled. | |
672 | */ | |
1da177e4 LT |
673 | static int |
674 | dasd_eckd_check_characteristics(struct dasd_device *device) | |
675 | { | |
676 | struct dasd_eckd_private *private; | |
3d052595 | 677 | struct dasd_uid uid; |
1da177e4 LT |
678 | void *rdc_data; |
679 | int rc; | |
680 | ||
681 | private = (struct dasd_eckd_private *) device->private; | |
682 | if (private == NULL) { | |
138c014d | 683 | private = kzalloc(sizeof(struct dasd_eckd_private), |
1da177e4 LT |
684 | GFP_KERNEL | GFP_DMA); |
685 | if (private == NULL) { | |
686 | DEV_MESSAGE(KERN_WARNING, device, "%s", | |
687 | "memory allocation failed for private " | |
688 | "data"); | |
689 | return -ENOMEM; | |
690 | } | |
1da177e4 LT |
691 | device->private = (void *) private; |
692 | } | |
693 | /* Invalidate status of initial analysis. */ | |
694 | private->init_cqr_status = -1; | |
695 | /* Set default cache operations. */ | |
696 | private->attrib.operation = DASD_NORMAL_CACHE; | |
697 | private->attrib.nr_cyl = 0; | |
698 | ||
40545573 HH |
699 | /* Read Configuration Data */ |
700 | rc = dasd_eckd_read_conf(device); | |
701 | if (rc) | |
702 | return rc; | |
703 | ||
704 | /* Generate device unique id and register in devmap */ | |
705 | rc = dasd_eckd_generate_uid(device, &uid); | |
706 | if (rc) | |
707 | return rc; | |
708 | rc = dasd_set_uid(device->cdev, &uid); | |
709 | if (rc == 1) /* new server found */ | |
8e79a441 | 710 | rc = dasd_eckd_validate_server(device, &uid); |
40545573 HH |
711 | if (rc) |
712 | return rc; | |
713 | ||
1da177e4 LT |
714 | /* Read Device Characteristics */ |
715 | rdc_data = (void *) &(private->rdc_data); | |
3d052595 | 716 | memset(rdc_data, 0, sizeof(rdc_data)); |
17283b56 | 717 | rc = dasd_generic_read_dev_chars(device, "ECKD", &rdc_data, 64); |
40545573 | 718 | if (rc) |
1da177e4 | 719 | DEV_MESSAGE(KERN_WARNING, device, |
40545573 HH |
720 | "Read device characteristics returned " |
721 | "rc=%d", rc); | |
1da177e4 LT |
722 | |
723 | DEV_MESSAGE(KERN_INFO, device, | |
724 | "%04X/%02X(CU:%04X/%02X) Cyl:%d Head:%d Sec:%d", | |
725 | private->rdc_data.dev_type, | |
726 | private->rdc_data.dev_model, | |
727 | private->rdc_data.cu_type, | |
728 | private->rdc_data.cu_model.model, | |
729 | private->rdc_data.no_cyl, | |
730 | private->rdc_data.trk_per_cyl, | |
731 | private->rdc_data.sec_per_trk); | |
3d052595 | 732 | return rc; |
1da177e4 LT |
733 | } |
734 | ||
735 | static struct dasd_ccw_req * | |
736 | dasd_eckd_analysis_ccw(struct dasd_device *device) | |
737 | { | |
738 | struct dasd_eckd_private *private; | |
739 | struct eckd_count *count_data; | |
740 | struct LO_eckd_data *LO_data; | |
741 | struct dasd_ccw_req *cqr; | |
742 | struct ccw1 *ccw; | |
743 | int cplength, datasize; | |
744 | int i; | |
745 | ||
746 | private = (struct dasd_eckd_private *) device->private; | |
747 | ||
748 | cplength = 8; | |
749 | datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); | |
750 | cqr = dasd_smalloc_request(dasd_eckd_discipline.name, | |
751 | cplength, datasize, device); | |
752 | if (IS_ERR(cqr)) | |
753 | return cqr; | |
754 | ccw = cqr->cpaddr; | |
755 | /* Define extent for the first 3 tracks. */ | |
756 | define_extent(ccw++, cqr->data, 0, 2, | |
757 | DASD_ECKD_CCW_READ_COUNT, device); | |
758 | LO_data = cqr->data + sizeof (struct DE_eckd_data); | |
759 | /* Locate record for the first 4 records on track 0. */ | |
760 | ccw[-1].flags |= CCW_FLAG_CC; | |
761 | locate_record(ccw++, LO_data++, 0, 0, 4, | |
762 | DASD_ECKD_CCW_READ_COUNT, device, 0); | |
763 | ||
764 | count_data = private->count_area; | |
765 | for (i = 0; i < 4; i++) { | |
766 | ccw[-1].flags |= CCW_FLAG_CC; | |
767 | ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; | |
768 | ccw->flags = 0; | |
769 | ccw->count = 8; | |
770 | ccw->cda = (__u32)(addr_t) count_data; | |
771 | ccw++; | |
772 | count_data++; | |
773 | } | |
774 | ||
775 | /* Locate record for the first record on track 2. */ | |
776 | ccw[-1].flags |= CCW_FLAG_CC; | |
777 | locate_record(ccw++, LO_data++, 2, 0, 1, | |
778 | DASD_ECKD_CCW_READ_COUNT, device, 0); | |
779 | /* Read count ccw. */ | |
780 | ccw[-1].flags |= CCW_FLAG_CC; | |
781 | ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; | |
782 | ccw->flags = 0; | |
783 | ccw->count = 8; | |
784 | ccw->cda = (__u32)(addr_t) count_data; | |
785 | ||
786 | cqr->device = device; | |
787 | cqr->retries = 0; | |
788 | cqr->buildclk = get_clock(); | |
789 | cqr->status = DASD_CQR_FILLED; | |
790 | return cqr; | |
791 | } | |
792 | ||
793 | /* | |
794 | * This is the callback function for the init_analysis cqr. It saves | |
795 | * the status of the initial analysis ccw before it frees it and kicks | |
796 | * the device to continue the startup sequence. This will call | |
797 | * dasd_eckd_do_analysis again (if the devices has not been marked | |
798 | * for deletion in the meantime). | |
799 | */ | |
800 | static void | |
801 | dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, void *data) | |
802 | { | |
803 | struct dasd_eckd_private *private; | |
804 | struct dasd_device *device; | |
805 | ||
806 | device = init_cqr->device; | |
807 | private = (struct dasd_eckd_private *) device->private; | |
808 | private->init_cqr_status = init_cqr->status; | |
809 | dasd_sfree_request(init_cqr, device); | |
810 | dasd_kick_device(device); | |
811 | } | |
812 | ||
813 | static int | |
814 | dasd_eckd_start_analysis(struct dasd_device *device) | |
815 | { | |
816 | struct dasd_eckd_private *private; | |
817 | struct dasd_ccw_req *init_cqr; | |
818 | ||
819 | private = (struct dasd_eckd_private *) device->private; | |
820 | init_cqr = dasd_eckd_analysis_ccw(device); | |
821 | if (IS_ERR(init_cqr)) | |
822 | return PTR_ERR(init_cqr); | |
823 | init_cqr->callback = dasd_eckd_analysis_callback; | |
824 | init_cqr->callback_data = NULL; | |
825 | init_cqr->expires = 5*HZ; | |
826 | dasd_add_request_head(init_cqr); | |
827 | return -EAGAIN; | |
828 | } | |
829 | ||
830 | static int | |
831 | dasd_eckd_end_analysis(struct dasd_device *device) | |
832 | { | |
833 | struct dasd_eckd_private *private; | |
834 | struct eckd_count *count_area; | |
835 | unsigned int sb, blk_per_trk; | |
836 | int status, i; | |
837 | ||
838 | private = (struct dasd_eckd_private *) device->private; | |
839 | status = private->init_cqr_status; | |
840 | private->init_cqr_status = -1; | |
841 | if (status != DASD_CQR_DONE) { | |
842 | DEV_MESSAGE(KERN_WARNING, device, "%s", | |
843 | "volume analysis returned unformatted disk"); | |
844 | return -EMEDIUMTYPE; | |
845 | } | |
846 | ||
847 | private->uses_cdl = 1; | |
848 | /* Calculate number of blocks/records per track. */ | |
849 | blk_per_trk = recs_per_track(&private->rdc_data, 0, device->bp_block); | |
850 | /* Check Track 0 for Compatible Disk Layout */ | |
851 | count_area = NULL; | |
852 | for (i = 0; i < 3; i++) { | |
853 | if (private->count_area[i].kl != 4 || | |
854 | private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) { | |
855 | private->uses_cdl = 0; | |
856 | break; | |
857 | } | |
858 | } | |
859 | if (i == 3) | |
860 | count_area = &private->count_area[4]; | |
861 | ||
862 | if (private->uses_cdl == 0) { | |
863 | for (i = 0; i < 5; i++) { | |
864 | if ((private->count_area[i].kl != 0) || | |
865 | (private->count_area[i].dl != | |
866 | private->count_area[0].dl)) | |
867 | break; | |
868 | } | |
869 | if (i == 5) | |
870 | count_area = &private->count_area[0]; | |
871 | } else { | |
872 | if (private->count_area[3].record == 1) | |
873 | DEV_MESSAGE(KERN_WARNING, device, "%s", | |
874 | "Trk 0: no records after VTOC!"); | |
875 | } | |
876 | if (count_area != NULL && count_area->kl == 0) { | |
877 | /* we found notthing violating our disk layout */ | |
878 | if (dasd_check_blocksize(count_area->dl) == 0) | |
879 | device->bp_block = count_area->dl; | |
880 | } | |
881 | if (device->bp_block == 0) { | |
882 | DEV_MESSAGE(KERN_WARNING, device, "%s", | |
883 | "Volume has incompatible disk layout"); | |
884 | return -EMEDIUMTYPE; | |
885 | } | |
886 | device->s2b_shift = 0; /* bits to shift 512 to get a block */ | |
887 | for (sb = 512; sb < device->bp_block; sb = sb << 1) | |
888 | device->s2b_shift++; | |
889 | ||
890 | blk_per_trk = recs_per_track(&private->rdc_data, 0, device->bp_block); | |
891 | device->blocks = (private->rdc_data.no_cyl * | |
892 | private->rdc_data.trk_per_cyl * | |
893 | blk_per_trk); | |
894 | ||
895 | DEV_MESSAGE(KERN_INFO, device, | |
896 | "(%dkB blks): %dkB at %dkB/trk %s", | |
897 | (device->bp_block >> 10), | |
898 | ((private->rdc_data.no_cyl * | |
899 | private->rdc_data.trk_per_cyl * | |
900 | blk_per_trk * (device->bp_block >> 9)) >> 1), | |
138c014d | 901 | ((blk_per_trk * device->bp_block) >> 10), |
1da177e4 LT |
902 | private->uses_cdl ? |
903 | "compatible disk layout" : "linux disk layout"); | |
904 | ||
905 | return 0; | |
906 | } | |
907 | ||
908 | static int | |
909 | dasd_eckd_do_analysis(struct dasd_device *device) | |
910 | { | |
911 | struct dasd_eckd_private *private; | |
912 | ||
913 | private = (struct dasd_eckd_private *) device->private; | |
914 | if (private->init_cqr_status < 0) | |
915 | return dasd_eckd_start_analysis(device); | |
916 | else | |
917 | return dasd_eckd_end_analysis(device); | |
918 | } | |
919 | ||
920 | static int | |
921 | dasd_eckd_fill_geometry(struct dasd_device *device, struct hd_geometry *geo) | |
922 | { | |
923 | struct dasd_eckd_private *private; | |
924 | ||
925 | private = (struct dasd_eckd_private *) device->private; | |
926 | if (dasd_check_blocksize(device->bp_block) == 0) { | |
927 | geo->sectors = recs_per_track(&private->rdc_data, | |
928 | 0, device->bp_block); | |
929 | } | |
930 | geo->cylinders = private->rdc_data.no_cyl; | |
931 | geo->heads = private->rdc_data.trk_per_cyl; | |
932 | return 0; | |
933 | } | |
934 | ||
935 | static struct dasd_ccw_req * | |
936 | dasd_eckd_format_device(struct dasd_device * device, | |
937 | struct format_data_t * fdata) | |
938 | { | |
939 | struct dasd_eckd_private *private; | |
940 | struct dasd_ccw_req *fcp; | |
941 | struct eckd_count *ect; | |
942 | struct ccw1 *ccw; | |
943 | void *data; | |
944 | int rpt, cyl, head; | |
945 | int cplength, datasize; | |
946 | int i; | |
947 | ||
948 | private = (struct dasd_eckd_private *) device->private; | |
949 | rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize); | |
950 | cyl = fdata->start_unit / private->rdc_data.trk_per_cyl; | |
951 | head = fdata->start_unit % private->rdc_data.trk_per_cyl; | |
952 | ||
953 | /* Sanity checks. */ | |
954 | if (fdata->start_unit >= | |
955 | (private->rdc_data.no_cyl * private->rdc_data.trk_per_cyl)) { | |
956 | DEV_MESSAGE(KERN_INFO, device, "Track no %d too big!", | |
957 | fdata->start_unit); | |
958 | return ERR_PTR(-EINVAL); | |
959 | } | |
960 | if (fdata->start_unit > fdata->stop_unit) { | |
961 | DEV_MESSAGE(KERN_INFO, device, "Track %d reached! ending.", | |
962 | fdata->start_unit); | |
963 | return ERR_PTR(-EINVAL); | |
964 | } | |
965 | if (dasd_check_blocksize(fdata->blksize) != 0) { | |
966 | DEV_MESSAGE(KERN_WARNING, device, | |
967 | "Invalid blocksize %d...terminating!", | |
968 | fdata->blksize); | |
969 | return ERR_PTR(-EINVAL); | |
970 | } | |
971 | ||
972 | /* | |
973 | * fdata->intensity is a bit string that tells us what to do: | |
974 | * Bit 0: write record zero | |
975 | * Bit 1: write home address, currently not supported | |
976 | * Bit 2: invalidate tracks | |
977 | * Bit 3: use OS/390 compatible disk layout (cdl) | |
978 | * Only some bit combinations do make sense. | |
979 | */ | |
980 | switch (fdata->intensity) { | |
981 | case 0x00: /* Normal format */ | |
982 | case 0x08: /* Normal format, use cdl. */ | |
983 | cplength = 2 + rpt; | |
984 | datasize = sizeof(struct DE_eckd_data) + | |
985 | sizeof(struct LO_eckd_data) + | |
986 | rpt * sizeof(struct eckd_count); | |
987 | break; | |
988 | case 0x01: /* Write record zero and format track. */ | |
989 | case 0x09: /* Write record zero and format track, use cdl. */ | |
990 | cplength = 3 + rpt; | |
991 | datasize = sizeof(struct DE_eckd_data) + | |
992 | sizeof(struct LO_eckd_data) + | |
993 | sizeof(struct eckd_count) + | |
994 | rpt * sizeof(struct eckd_count); | |
995 | break; | |
996 | case 0x04: /* Invalidate track. */ | |
997 | case 0x0c: /* Invalidate track, use cdl. */ | |
998 | cplength = 3; | |
999 | datasize = sizeof(struct DE_eckd_data) + | |
1000 | sizeof(struct LO_eckd_data) + | |
1001 | sizeof(struct eckd_count); | |
1002 | break; | |
1003 | default: | |
1004 | DEV_MESSAGE(KERN_WARNING, device, "Invalid flags 0x%x.", | |
1005 | fdata->intensity); | |
1006 | return ERR_PTR(-EINVAL); | |
1007 | } | |
1008 | /* Allocate the format ccw request. */ | |
1009 | fcp = dasd_smalloc_request(dasd_eckd_discipline.name, | |
1010 | cplength, datasize, device); | |
1011 | if (IS_ERR(fcp)) | |
1012 | return fcp; | |
1013 | ||
1014 | data = fcp->data; | |
1015 | ccw = fcp->cpaddr; | |
1016 | ||
1017 | switch (fdata->intensity & ~0x08) { | |
1018 | case 0x00: /* Normal format. */ | |
1019 | define_extent(ccw++, (struct DE_eckd_data *) data, | |
1020 | fdata->start_unit, fdata->start_unit, | |
1021 | DASD_ECKD_CCW_WRITE_CKD, device); | |
1022 | data += sizeof(struct DE_eckd_data); | |
1023 | ccw[-1].flags |= CCW_FLAG_CC; | |
1024 | locate_record(ccw++, (struct LO_eckd_data *) data, | |
1025 | fdata->start_unit, 0, rpt, | |
1026 | DASD_ECKD_CCW_WRITE_CKD, device, | |
1027 | fdata->blksize); | |
1028 | data += sizeof(struct LO_eckd_data); | |
1029 | break; | |
1030 | case 0x01: /* Write record zero + format track. */ | |
1031 | define_extent(ccw++, (struct DE_eckd_data *) data, | |
1032 | fdata->start_unit, fdata->start_unit, | |
1033 | DASD_ECKD_CCW_WRITE_RECORD_ZERO, | |
1034 | device); | |
1035 | data += sizeof(struct DE_eckd_data); | |
1036 | ccw[-1].flags |= CCW_FLAG_CC; | |
1037 | locate_record(ccw++, (struct LO_eckd_data *) data, | |
1038 | fdata->start_unit, 0, rpt + 1, | |
1039 | DASD_ECKD_CCW_WRITE_RECORD_ZERO, device, | |
1040 | device->bp_block); | |
1041 | data += sizeof(struct LO_eckd_data); | |
1042 | break; | |
1043 | case 0x04: /* Invalidate track. */ | |
1044 | define_extent(ccw++, (struct DE_eckd_data *) data, | |
1045 | fdata->start_unit, fdata->start_unit, | |
1046 | DASD_ECKD_CCW_WRITE_CKD, device); | |
1047 | data += sizeof(struct DE_eckd_data); | |
1048 | ccw[-1].flags |= CCW_FLAG_CC; | |
1049 | locate_record(ccw++, (struct LO_eckd_data *) data, | |
1050 | fdata->start_unit, 0, 1, | |
1051 | DASD_ECKD_CCW_WRITE_CKD, device, 8); | |
1052 | data += sizeof(struct LO_eckd_data); | |
1053 | break; | |
1054 | } | |
1055 | if (fdata->intensity & 0x01) { /* write record zero */ | |
1056 | ect = (struct eckd_count *) data; | |
1057 | data += sizeof(struct eckd_count); | |
1058 | ect->cyl = cyl; | |
1059 | ect->head = head; | |
1060 | ect->record = 0; | |
1061 | ect->kl = 0; | |
1062 | ect->dl = 8; | |
1063 | ccw[-1].flags |= CCW_FLAG_CC; | |
1064 | ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; | |
1065 | ccw->flags = CCW_FLAG_SLI; | |
1066 | ccw->count = 8; | |
1067 | ccw->cda = (__u32)(addr_t) ect; | |
1068 | ccw++; | |
1069 | } | |
1070 | if ((fdata->intensity & ~0x08) & 0x04) { /* erase track */ | |
1071 | ect = (struct eckd_count *) data; | |
1072 | data += sizeof(struct eckd_count); | |
1073 | ect->cyl = cyl; | |
1074 | ect->head = head; | |
1075 | ect->record = 1; | |
1076 | ect->kl = 0; | |
1077 | ect->dl = 0; | |
1078 | ccw[-1].flags |= CCW_FLAG_CC; | |
1079 | ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; | |
1080 | ccw->flags = CCW_FLAG_SLI; | |
1081 | ccw->count = 8; | |
1082 | ccw->cda = (__u32)(addr_t) ect; | |
1083 | } else { /* write remaining records */ | |
1084 | for (i = 0; i < rpt; i++) { | |
1085 | ect = (struct eckd_count *) data; | |
1086 | data += sizeof(struct eckd_count); | |
1087 | ect->cyl = cyl; | |
1088 | ect->head = head; | |
1089 | ect->record = i + 1; | |
1090 | ect->kl = 0; | |
1091 | ect->dl = fdata->blksize; | |
1092 | /* Check for special tracks 0-1 when formatting CDL */ | |
1093 | if ((fdata->intensity & 0x08) && | |
1094 | fdata->start_unit == 0) { | |
1095 | if (i < 3) { | |
1096 | ect->kl = 4; | |
1097 | ect->dl = sizes_trk0[i] - 4; | |
138c014d | 1098 | } |
1da177e4 LT |
1099 | } |
1100 | if ((fdata->intensity & 0x08) && | |
1101 | fdata->start_unit == 1) { | |
1102 | ect->kl = 44; | |
1103 | ect->dl = LABEL_SIZE - 44; | |
1104 | } | |
1105 | ccw[-1].flags |= CCW_FLAG_CC; | |
1106 | ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; | |
1107 | ccw->flags = CCW_FLAG_SLI; | |
1108 | ccw->count = 8; | |
1109 | ccw->cda = (__u32)(addr_t) ect; | |
1110 | ccw++; | |
1111 | } | |
1112 | } | |
1113 | fcp->device = device; | |
1114 | fcp->retries = 2; /* set retry counter to enable ERP */ | |
1115 | fcp->buildclk = get_clock(); | |
1116 | fcp->status = DASD_CQR_FILLED; | |
1117 | return fcp; | |
1118 | } | |
1119 | ||
1120 | static dasd_era_t | |
1121 | dasd_eckd_examine_error(struct dasd_ccw_req * cqr, struct irb * irb) | |
1122 | { | |
1123 | struct dasd_device *device = (struct dasd_device *) cqr->device; | |
1124 | struct ccw_device *cdev = device->cdev; | |
1125 | ||
1126 | if (irb->scsw.cstat == 0x00 && | |
1127 | irb->scsw.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END)) | |
1128 | return dasd_era_none; | |
1129 | ||
1130 | switch (cdev->id.cu_type) { | |
1131 | case 0x3990: | |
1132 | case 0x2105: | |
1133 | case 0x2107: | |
1134 | case 0x1750: | |
1135 | return dasd_3990_erp_examine(cqr, irb); | |
1136 | case 0x9343: | |
1137 | return dasd_9343_erp_examine(cqr, irb); | |
1138 | case 0x3880: | |
1139 | default: | |
1140 | DEV_MESSAGE(KERN_WARNING, device, "%s", | |
1141 | "default (unknown CU type) - RECOVERABLE return"); | |
1142 | return dasd_era_recover; | |
1143 | } | |
1144 | } | |
1145 | ||
1146 | static dasd_erp_fn_t | |
1147 | dasd_eckd_erp_action(struct dasd_ccw_req * cqr) | |
1148 | { | |
1149 | struct dasd_device *device = (struct dasd_device *) cqr->device; | |
1150 | struct ccw_device *cdev = device->cdev; | |
1151 | ||
1152 | switch (cdev->id.cu_type) { | |
1153 | case 0x3990: | |
1154 | case 0x2105: | |
1155 | case 0x2107: | |
1156 | case 0x1750: | |
1157 | return dasd_3990_erp_action; | |
1158 | case 0x9343: | |
1159 | case 0x3880: | |
1160 | default: | |
1161 | return dasd_default_erp_action; | |
1162 | } | |
1163 | } | |
1164 | ||
1165 | static dasd_erp_fn_t | |
1166 | dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) | |
1167 | { | |
1168 | return dasd_default_erp_postaction; | |
1169 | } | |
1170 | ||
1171 | static struct dasd_ccw_req * | |
1172 | dasd_eckd_build_cp(struct dasd_device * device, struct request *req) | |
1173 | { | |
1174 | struct dasd_eckd_private *private; | |
1175 | unsigned long *idaws; | |
1176 | struct LO_eckd_data *LO_data; | |
1177 | struct dasd_ccw_req *cqr; | |
1178 | struct ccw1 *ccw; | |
1179 | struct bio *bio; | |
1180 | struct bio_vec *bv; | |
1181 | char *dst; | |
1182 | unsigned int blksize, blk_per_trk, off; | |
1183 | int count, cidaw, cplength, datasize; | |
1184 | sector_t recid, first_rec, last_rec; | |
1185 | sector_t first_trk, last_trk; | |
1186 | unsigned int first_offs, last_offs; | |
1187 | unsigned char cmd, rcmd; | |
1188 | int i; | |
1189 | ||
1190 | private = (struct dasd_eckd_private *) device->private; | |
1191 | if (rq_data_dir(req) == READ) | |
1192 | cmd = DASD_ECKD_CCW_READ_MT; | |
1193 | else if (rq_data_dir(req) == WRITE) | |
1194 | cmd = DASD_ECKD_CCW_WRITE_MT; | |
1195 | else | |
1196 | return ERR_PTR(-EINVAL); | |
1197 | /* Calculate number of blocks/records per track. */ | |
1198 | blksize = device->bp_block; | |
1199 | blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); | |
1200 | /* Calculate record id of first and last block. */ | |
1201 | first_rec = first_trk = req->sector >> device->s2b_shift; | |
1202 | first_offs = sector_div(first_trk, blk_per_trk); | |
1203 | last_rec = last_trk = | |
1204 | (req->sector + req->nr_sectors - 1) >> device->s2b_shift; | |
1205 | last_offs = sector_div(last_trk, blk_per_trk); | |
1206 | /* Check struct bio and count the number of blocks for the request. */ | |
1207 | count = 0; | |
1208 | cidaw = 0; | |
1209 | rq_for_each_bio(bio, req) { | |
1210 | bio_for_each_segment(bv, bio, i) { | |
1211 | if (bv->bv_len & (blksize - 1)) | |
1212 | /* Eckd can only do full blocks. */ | |
1213 | return ERR_PTR(-EINVAL); | |
1214 | count += bv->bv_len >> (device->s2b_shift + 9); | |
347a8dc3 | 1215 | #if defined(CONFIG_64BIT) |
1da177e4 LT |
1216 | if (idal_is_needed (page_address(bv->bv_page), |
1217 | bv->bv_len)) | |
1218 | cidaw += bv->bv_len >> (device->s2b_shift + 9); | |
1219 | #endif | |
1220 | } | |
1221 | } | |
1222 | /* Paranoia. */ | |
1223 | if (count != last_rec - first_rec + 1) | |
1224 | return ERR_PTR(-EINVAL); | |
1225 | /* 1x define extent + 1x locate record + number of blocks */ | |
1226 | cplength = 2 + count; | |
1227 | /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ | |
1228 | datasize = sizeof(struct DE_eckd_data) + sizeof(struct LO_eckd_data) + | |
1229 | cidaw * sizeof(unsigned long); | |
1230 | /* Find out the number of additional locate record ccws for cdl. */ | |
1231 | if (private->uses_cdl && first_rec < 2*blk_per_trk) { | |
1232 | if (last_rec >= 2*blk_per_trk) | |
1233 | count = 2*blk_per_trk - first_rec; | |
1234 | cplength += count; | |
1235 | datasize += count*sizeof(struct LO_eckd_data); | |
1236 | } | |
1237 | /* Allocate the ccw request. */ | |
1238 | cqr = dasd_smalloc_request(dasd_eckd_discipline.name, | |
1239 | cplength, datasize, device); | |
1240 | if (IS_ERR(cqr)) | |
1241 | return cqr; | |
1242 | ccw = cqr->cpaddr; | |
1243 | /* First ccw is define extent. */ | |
d54853ef MS |
1244 | if (define_extent(ccw++, cqr->data, first_trk, |
1245 | last_trk, cmd, device) == -EAGAIN) { | |
1246 | /* Clock not in sync and XRC is enabled. Try again later. */ | |
1247 | dasd_sfree_request(cqr, device); | |
1248 | return ERR_PTR(-EAGAIN); | |
1249 | } | |
1da177e4 LT |
1250 | /* Build locate_record+read/write/ccws. */ |
1251 | idaws = (unsigned long *) (cqr->data + sizeof(struct DE_eckd_data)); | |
1252 | LO_data = (struct LO_eckd_data *) (idaws + cidaw); | |
1253 | recid = first_rec; | |
1254 | if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { | |
1255 | /* Only standard blocks so there is just one locate record. */ | |
1256 | ccw[-1].flags |= CCW_FLAG_CC; | |
1257 | locate_record(ccw++, LO_data++, first_trk, first_offs + 1, | |
1258 | last_rec - recid + 1, cmd, device, blksize); | |
1259 | } | |
1260 | rq_for_each_bio(bio, req) bio_for_each_segment(bv, bio, i) { | |
1261 | dst = page_address(bv->bv_page) + bv->bv_offset; | |
1262 | if (dasd_page_cache) { | |
1263 | char *copy = kmem_cache_alloc(dasd_page_cache, | |
441e143e | 1264 | GFP_DMA | __GFP_NOWARN); |
1da177e4 LT |
1265 | if (copy && rq_data_dir(req) == WRITE) |
1266 | memcpy(copy + bv->bv_offset, dst, bv->bv_len); | |
1267 | if (copy) | |
1268 | dst = copy + bv->bv_offset; | |
1269 | } | |
1270 | for (off = 0; off < bv->bv_len; off += blksize) { | |
1271 | sector_t trkid = recid; | |
1272 | unsigned int recoffs = sector_div(trkid, blk_per_trk); | |
1273 | rcmd = cmd; | |
1274 | count = blksize; | |
1275 | /* Locate record for cdl special block ? */ | |
1276 | if (private->uses_cdl && recid < 2*blk_per_trk) { | |
1277 | if (dasd_eckd_cdl_special(blk_per_trk, recid)){ | |
1278 | rcmd |= 0x8; | |
1279 | count = dasd_eckd_cdl_reclen(recid); | |
ec5883ab HH |
1280 | if (count < blksize && |
1281 | rq_data_dir(req) == READ) | |
1da177e4 LT |
1282 | memset(dst + count, 0xe5, |
1283 | blksize - count); | |
1284 | } | |
1285 | ccw[-1].flags |= CCW_FLAG_CC; | |
1286 | locate_record(ccw++, LO_data++, | |
1287 | trkid, recoffs + 1, | |
1288 | 1, rcmd, device, count); | |
1289 | } | |
1290 | /* Locate record for standard blocks ? */ | |
1291 | if (private->uses_cdl && recid == 2*blk_per_trk) { | |
1292 | ccw[-1].flags |= CCW_FLAG_CC; | |
1293 | locate_record(ccw++, LO_data++, | |
1294 | trkid, recoffs + 1, | |
1295 | last_rec - recid + 1, | |
1296 | cmd, device, count); | |
1297 | } | |
1298 | /* Read/write ccw. */ | |
1299 | ccw[-1].flags |= CCW_FLAG_CC; | |
1300 | ccw->cmd_code = rcmd; | |
1301 | ccw->count = count; | |
1302 | if (idal_is_needed(dst, blksize)) { | |
1303 | ccw->cda = (__u32)(addr_t) idaws; | |
1304 | ccw->flags = CCW_FLAG_IDA; | |
1305 | idaws = idal_create_words(idaws, dst, blksize); | |
1306 | } else { | |
1307 | ccw->cda = (__u32)(addr_t) dst; | |
1308 | ccw->flags = 0; | |
1309 | } | |
1310 | ccw++; | |
1311 | dst += blksize; | |
1312 | recid++; | |
1313 | } | |
1314 | } | |
4aff5e23 | 1315 | if (req->cmd_flags & REQ_FAILFAST) |
1c01b8a5 | 1316 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
1da177e4 LT |
1317 | cqr->device = device; |
1318 | cqr->expires = 5 * 60 * HZ; /* 5 minutes */ | |
1319 | cqr->lpm = private->path_data.ppm; | |
1320 | cqr->retries = 256; | |
1321 | cqr->buildclk = get_clock(); | |
1322 | cqr->status = DASD_CQR_FILLED; | |
1323 | return cqr; | |
1324 | } | |
1325 | ||
1326 | static int | |
1327 | dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) | |
1328 | { | |
1329 | struct dasd_eckd_private *private; | |
1330 | struct ccw1 *ccw; | |
1331 | struct bio *bio; | |
1332 | struct bio_vec *bv; | |
1333 | char *dst, *cda; | |
1334 | unsigned int blksize, blk_per_trk, off; | |
1335 | sector_t recid; | |
1336 | int i, status; | |
1337 | ||
1338 | if (!dasd_page_cache) | |
1339 | goto out; | |
1340 | private = (struct dasd_eckd_private *) cqr->device->private; | |
1341 | blksize = cqr->device->bp_block; | |
1342 | blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); | |
1343 | recid = req->sector >> cqr->device->s2b_shift; | |
1344 | ccw = cqr->cpaddr; | |
1345 | /* Skip over define extent & locate record. */ | |
1346 | ccw++; | |
1347 | if (private->uses_cdl == 0 || recid > 2*blk_per_trk) | |
1348 | ccw++; | |
1349 | rq_for_each_bio(bio, req) bio_for_each_segment(bv, bio, i) { | |
1350 | dst = page_address(bv->bv_page) + bv->bv_offset; | |
1351 | for (off = 0; off < bv->bv_len; off += blksize) { | |
1352 | /* Skip locate record. */ | |
1353 | if (private->uses_cdl && recid <= 2*blk_per_trk) | |
1354 | ccw++; | |
1355 | if (dst) { | |
1356 | if (ccw->flags & CCW_FLAG_IDA) | |
1357 | cda = *((char **)((addr_t) ccw->cda)); | |
1358 | else | |
1359 | cda = (char *)((addr_t) ccw->cda); | |
1360 | if (dst != cda) { | |
1361 | if (rq_data_dir(req) == READ) | |
1362 | memcpy(dst, cda, bv->bv_len); | |
1363 | kmem_cache_free(dasd_page_cache, | |
1364 | (void *)((addr_t)cda & PAGE_MASK)); | |
1365 | } | |
1366 | dst = NULL; | |
1367 | } | |
1368 | ccw++; | |
1369 | recid++; | |
1370 | } | |
1371 | } | |
1372 | out: | |
1373 | status = cqr->status == DASD_CQR_DONE; | |
1374 | dasd_sfree_request(cqr, cqr->device); | |
1375 | return status; | |
1376 | } | |
1377 | ||
1378 | static int | |
1379 | dasd_eckd_fill_info(struct dasd_device * device, | |
1380 | struct dasd_information2_t * info) | |
1381 | { | |
1382 | struct dasd_eckd_private *private; | |
1383 | ||
1384 | private = (struct dasd_eckd_private *) device->private; | |
1385 | info->label_block = 2; | |
1386 | info->FBA_layout = private->uses_cdl ? 0 : 1; | |
1387 | info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; | |
1388 | info->characteristics_size = sizeof(struct dasd_eckd_characteristics); | |
1389 | memcpy(info->characteristics, &private->rdc_data, | |
1390 | sizeof(struct dasd_eckd_characteristics)); | |
1391 | info->confdata_size = sizeof (struct dasd_eckd_confdata); | |
1392 | memcpy(info->configuration_data, &private->conf_data, | |
1393 | sizeof (struct dasd_eckd_confdata)); | |
1394 | return 0; | |
1395 | } | |
1396 | ||
1397 | /* | |
1398 | * SECTION: ioctl functions for eckd devices. | |
1399 | */ | |
1400 | ||
1401 | /* | |
1402 | * Release device ioctl. | |
138c014d | 1403 | * Buils a channel programm to releases a prior reserved |
1da177e4 LT |
1404 | * (see dasd_eckd_reserve) device. |
1405 | */ | |
1406 | static int | |
1107ccfb | 1407 | dasd_eckd_release(struct dasd_device *device) |
1da177e4 | 1408 | { |
1da177e4 LT |
1409 | struct dasd_ccw_req *cqr; |
1410 | int rc; | |
1411 | ||
1412 | if (!capable(CAP_SYS_ADMIN)) | |
1413 | return -EACCES; | |
1414 | ||
1da177e4 LT |
1415 | cqr = dasd_smalloc_request(dasd_eckd_discipline.name, |
1416 | 1, 32, device); | |
1417 | if (IS_ERR(cqr)) { | |
1418 | DEV_MESSAGE(KERN_WARNING, device, "%s", | |
1419 | "Could not allocate initialization request"); | |
1420 | return PTR_ERR(cqr); | |
1421 | } | |
1422 | cqr->cpaddr->cmd_code = DASD_ECKD_CCW_RELEASE; | |
1423 | cqr->cpaddr->flags |= CCW_FLAG_SLI; | |
1424 | cqr->cpaddr->count = 32; | |
1425 | cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; | |
1426 | cqr->device = device; | |
1427 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); | |
1c01b8a5 | 1428 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
336c340b | 1429 | cqr->retries = 2; /* set retry counter to enable basic ERP */ |
1da177e4 LT |
1430 | cqr->expires = 2 * HZ; |
1431 | cqr->buildclk = get_clock(); | |
1432 | cqr->status = DASD_CQR_FILLED; | |
1433 | ||
1434 | rc = dasd_sleep_on_immediatly(cqr); | |
1435 | ||
1436 | dasd_sfree_request(cqr, cqr->device); | |
1437 | return rc; | |
1438 | } | |
1439 | ||
1440 | /* | |
1441 | * Reserve device ioctl. | |
1442 | * Options are set to 'synchronous wait for interrupt' and | |
138c014d HH |
1443 | * 'timeout the request'. This leads to a terminate IO if |
1444 | * the interrupt is outstanding for a certain time. | |
1da177e4 LT |
1445 | */ |
1446 | static int | |
1107ccfb | 1447 | dasd_eckd_reserve(struct dasd_device *device) |
1da177e4 | 1448 | { |
1da177e4 LT |
1449 | struct dasd_ccw_req *cqr; |
1450 | int rc; | |
1451 | ||
1452 | if (!capable(CAP_SYS_ADMIN)) | |
1453 | return -EACCES; | |
1454 | ||
1da177e4 LT |
1455 | cqr = dasd_smalloc_request(dasd_eckd_discipline.name, |
1456 | 1, 32, device); | |
1457 | if (IS_ERR(cqr)) { | |
1458 | DEV_MESSAGE(KERN_WARNING, device, "%s", | |
1459 | "Could not allocate initialization request"); | |
1460 | return PTR_ERR(cqr); | |
1461 | } | |
1462 | cqr->cpaddr->cmd_code = DASD_ECKD_CCW_RESERVE; | |
1463 | cqr->cpaddr->flags |= CCW_FLAG_SLI; | |
1464 | cqr->cpaddr->count = 32; | |
1465 | cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; | |
1466 | cqr->device = device; | |
1467 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); | |
1c01b8a5 | 1468 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
336c340b | 1469 | cqr->retries = 2; /* set retry counter to enable basic ERP */ |
1da177e4 LT |
1470 | cqr->expires = 2 * HZ; |
1471 | cqr->buildclk = get_clock(); | |
1472 | cqr->status = DASD_CQR_FILLED; | |
1473 | ||
1474 | rc = dasd_sleep_on_immediatly(cqr); | |
1475 | ||
1476 | dasd_sfree_request(cqr, cqr->device); | |
1477 | return rc; | |
1478 | } | |
1479 | ||
1480 | /* | |
1481 | * Steal lock ioctl - unconditional reserve device. | |
138c014d | 1482 | * Buils a channel programm to break a device's reservation. |
1da177e4 LT |
1483 | * (unconditional reserve) |
1484 | */ | |
1485 | static int | |
1107ccfb | 1486 | dasd_eckd_steal_lock(struct dasd_device *device) |
1da177e4 | 1487 | { |
1da177e4 LT |
1488 | struct dasd_ccw_req *cqr; |
1489 | int rc; | |
1490 | ||
1491 | if (!capable(CAP_SYS_ADMIN)) | |
1492 | return -EACCES; | |
1493 | ||
1da177e4 LT |
1494 | cqr = dasd_smalloc_request(dasd_eckd_discipline.name, |
1495 | 1, 32, device); | |
1496 | if (IS_ERR(cqr)) { | |
1497 | DEV_MESSAGE(KERN_WARNING, device, "%s", | |
1498 | "Could not allocate initialization request"); | |
1499 | return PTR_ERR(cqr); | |
1500 | } | |
1501 | cqr->cpaddr->cmd_code = DASD_ECKD_CCW_SLCK; | |
1502 | cqr->cpaddr->flags |= CCW_FLAG_SLI; | |
1503 | cqr->cpaddr->count = 32; | |
1504 | cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; | |
1505 | cqr->device = device; | |
1506 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); | |
1c01b8a5 | 1507 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
336c340b | 1508 | cqr->retries = 2; /* set retry counter to enable basic ERP */ |
1da177e4 LT |
1509 | cqr->expires = 2 * HZ; |
1510 | cqr->buildclk = get_clock(); | |
1511 | cqr->status = DASD_CQR_FILLED; | |
1512 | ||
1513 | rc = dasd_sleep_on_immediatly(cqr); | |
1514 | ||
1515 | dasd_sfree_request(cqr, cqr->device); | |
1516 | return rc; | |
1517 | } | |
1518 | ||
1519 | /* | |
1520 | * Read performance statistics | |
1521 | */ | |
1522 | static int | |
1107ccfb | 1523 | dasd_eckd_performance(struct dasd_device *device, void __user *argp) |
1da177e4 | 1524 | { |
1da177e4 LT |
1525 | struct dasd_psf_prssd_data *prssdp; |
1526 | struct dasd_rssd_perf_stats_t *stats; | |
1527 | struct dasd_ccw_req *cqr; | |
1528 | struct ccw1 *ccw; | |
1529 | int rc; | |
1530 | ||
1da177e4 LT |
1531 | cqr = dasd_smalloc_request(dasd_eckd_discipline.name, |
1532 | 1 /* PSF */ + 1 /* RSSD */ , | |
1533 | (sizeof (struct dasd_psf_prssd_data) + | |
1534 | sizeof (struct dasd_rssd_perf_stats_t)), | |
1535 | device); | |
1536 | if (IS_ERR(cqr)) { | |
1537 | DEV_MESSAGE(KERN_WARNING, device, "%s", | |
1538 | "Could not allocate initialization request"); | |
1539 | return PTR_ERR(cqr); | |
1540 | } | |
1541 | cqr->device = device; | |
1542 | cqr->retries = 0; | |
1543 | cqr->expires = 10 * HZ; | |
1544 | ||
1545 | /* Prepare for Read Subsystem Data */ | |
1546 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
1547 | memset(prssdp, 0, sizeof (struct dasd_psf_prssd_data)); | |
1548 | prssdp->order = PSF_ORDER_PRSSD; | |
1549 | prssdp->suborder = 0x01; /* Perfomance Statistics */ | |
1550 | prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ | |
1551 | ||
1552 | ccw = cqr->cpaddr; | |
1553 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
1554 | ccw->count = sizeof (struct dasd_psf_prssd_data); | |
1555 | ccw->flags |= CCW_FLAG_CC; | |
1556 | ccw->cda = (__u32)(addr_t) prssdp; | |
1557 | ||
1558 | /* Read Subsystem Data - Performance Statistics */ | |
1559 | stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); | |
1560 | memset(stats, 0, sizeof (struct dasd_rssd_perf_stats_t)); | |
1561 | ||
1562 | ccw++; | |
1563 | ccw->cmd_code = DASD_ECKD_CCW_RSSD; | |
1564 | ccw->count = sizeof (struct dasd_rssd_perf_stats_t); | |
1565 | ccw->cda = (__u32)(addr_t) stats; | |
1566 | ||
1567 | cqr->buildclk = get_clock(); | |
1568 | cqr->status = DASD_CQR_FILLED; | |
1569 | rc = dasd_sleep_on(cqr); | |
1570 | if (rc == 0) { | |
1571 | /* Prepare for Read Subsystem Data */ | |
1572 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
1573 | stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); | |
1107ccfb CH |
1574 | if (copy_to_user(argp, stats, |
1575 | sizeof(struct dasd_rssd_perf_stats_t))) | |
1576 | rc = -EFAULT; | |
1da177e4 LT |
1577 | } |
1578 | dasd_sfree_request(cqr, cqr->device); | |
1579 | return rc; | |
1580 | } | |
1581 | ||
1582 | /* | |
1583 | * Get attributes (cache operations) | |
1584 | * Returnes the cache attributes used in Define Extend (DE). | |
1585 | */ | |
1586 | static int | |
1107ccfb | 1587 | dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) |
1da177e4 | 1588 | { |
1107ccfb CH |
1589 | struct dasd_eckd_private *private = |
1590 | (struct dasd_eckd_private *)device->private; | |
1591 | struct attrib_data_t attrib = private->attrib; | |
1da177e4 LT |
1592 | int rc; |
1593 | ||
1594 | if (!capable(CAP_SYS_ADMIN)) | |
1595 | return -EACCES; | |
1107ccfb | 1596 | if (!argp) |
1da177e4 LT |
1597 | return -EINVAL; |
1598 | ||
1107ccfb CH |
1599 | rc = 0; |
1600 | if (copy_to_user(argp, (long *) &attrib, | |
1601 | sizeof (struct attrib_data_t))) | |
1602 | rc = -EFAULT; | |
1da177e4 LT |
1603 | |
1604 | return rc; | |
1605 | } | |
1606 | ||
1607 | /* | |
1608 | * Set attributes (cache operations) | |
1609 | * Stores the attributes for cache operation to be used in Define Extend (DE). | |
1610 | */ | |
1611 | static int | |
1107ccfb | 1612 | dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) |
1da177e4 | 1613 | { |
1107ccfb CH |
1614 | struct dasd_eckd_private *private = |
1615 | (struct dasd_eckd_private *)device->private; | |
1da177e4 LT |
1616 | struct attrib_data_t attrib; |
1617 | ||
1618 | if (!capable(CAP_SYS_ADMIN)) | |
1619 | return -EACCES; | |
1107ccfb | 1620 | if (!argp) |
1da177e4 LT |
1621 | return -EINVAL; |
1622 | ||
1107ccfb | 1623 | if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) |
1da177e4 | 1624 | return -EFAULT; |
1da177e4 LT |
1625 | private->attrib = attrib; |
1626 | ||
1627 | DEV_MESSAGE(KERN_INFO, device, | |
1628 | "cache operation mode set to %x (%i cylinder prestage)", | |
1629 | private->attrib.operation, private->attrib.nr_cyl); | |
1630 | return 0; | |
1631 | } | |
1632 | ||
1107ccfb CH |
1633 | static int |
1634 | dasd_eckd_ioctl(struct dasd_device *device, unsigned int cmd, void __user *argp) | |
1635 | { | |
1636 | switch (cmd) { | |
1637 | case BIODASDGATTR: | |
1638 | return dasd_eckd_get_attrib(device, argp); | |
1639 | case BIODASDSATTR: | |
1640 | return dasd_eckd_set_attrib(device, argp); | |
1641 | case BIODASDPSRD: | |
1642 | return dasd_eckd_performance(device, argp); | |
1643 | case BIODASDRLSE: | |
1644 | return dasd_eckd_release(device); | |
1645 | case BIODASDRSRV: | |
1646 | return dasd_eckd_reserve(device); | |
1647 | case BIODASDSLCK: | |
1648 | return dasd_eckd_steal_lock(device); | |
1649 | default: | |
1650 | return -ENOIOCTLCMD; | |
1651 | } | |
1652 | } | |
1653 | ||
445b5b49 HH |
1654 | /* |
1655 | * Dump the range of CCWs into 'page' buffer | |
1656 | * and return number of printed chars. | |
1657 | */ | |
4d284cac | 1658 | static int |
445b5b49 HH |
1659 | dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) |
1660 | { | |
1661 | int len, count; | |
1662 | char *datap; | |
1663 | ||
1664 | len = 0; | |
1665 | while (from <= to) { | |
1666 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER | |
1667 | " CCW %p: %08X %08X DAT:", | |
1668 | from, ((int *) from)[0], ((int *) from)[1]); | |
1669 | ||
1670 | /* get pointer to data (consider IDALs) */ | |
1671 | if (from->flags & CCW_FLAG_IDA) | |
1672 | datap = (char *) *((addr_t *) (addr_t) from->cda); | |
1673 | else | |
1674 | datap = (char *) ((addr_t) from->cda); | |
1675 | ||
1676 | /* dump data (max 32 bytes) */ | |
1677 | for (count = 0; count < from->count && count < 32; count++) { | |
1678 | if (count % 8 == 0) len += sprintf(page + len, " "); | |
1679 | if (count % 4 == 0) len += sprintf(page + len, " "); | |
1680 | len += sprintf(page + len, "%02x", datap[count]); | |
1681 | } | |
1682 | len += sprintf(page + len, "\n"); | |
1683 | from++; | |
1684 | } | |
1685 | return len; | |
1686 | } | |
1687 | ||
1da177e4 LT |
1688 | /* |
1689 | * Print sense data and related channel program. | |
1690 | * Parts are printed because printk buffer is only 1024 bytes. | |
1691 | */ | |
1692 | static void | |
1693 | dasd_eckd_dump_sense(struct dasd_device *device, struct dasd_ccw_req * req, | |
1694 | struct irb *irb) | |
1695 | { | |
1696 | char *page; | |
445b5b49 HH |
1697 | struct ccw1 *first, *last, *fail, *from, *to; |
1698 | int len, sl, sct; | |
1da177e4 LT |
1699 | |
1700 | page = (char *) get_zeroed_page(GFP_ATOMIC); | |
1701 | if (page == NULL) { | |
1702 | DEV_MESSAGE(KERN_ERR, device, " %s", | |
1703 | "No memory to dump sense data"); | |
1704 | return; | |
1705 | } | |
445b5b49 HH |
1706 | /* dump the sense data */ |
1707 | len = sprintf(page, KERN_ERR PRINTK_HEADER | |
1da177e4 LT |
1708 | " I/O status report for device %s:\n", |
1709 | device->cdev->dev.bus_id); | |
1710 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER | |
1711 | " in req: %p CS: 0x%02X DS: 0x%02X\n", req, | |
1712 | irb->scsw.cstat, irb->scsw.dstat); | |
1713 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER | |
1714 | " device %s: Failing CCW: %p\n", | |
1715 | device->cdev->dev.bus_id, | |
1716 | (void *) (addr_t) irb->scsw.cpa); | |
1717 | if (irb->esw.esw0.erw.cons) { | |
1718 | for (sl = 0; sl < 4; sl++) { | |
1719 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER | |
1720 | " Sense(hex) %2d-%2d:", | |
1721 | (8 * sl), ((8 * sl) + 7)); | |
1722 | ||
1723 | for (sct = 0; sct < 8; sct++) { | |
1724 | len += sprintf(page + len, " %02x", | |
1725 | irb->ecw[8 * sl + sct]); | |
1726 | } | |
1727 | len += sprintf(page + len, "\n"); | |
1728 | } | |
1729 | ||
1730 | if (irb->ecw[27] & DASD_SENSE_BIT_0) { | |
1731 | /* 24 Byte Sense Data */ | |
445b5b49 HH |
1732 | sprintf(page + len, KERN_ERR PRINTK_HEADER |
1733 | " 24 Byte: %x MSG %x, " | |
1734 | "%s MSGb to SYSOP\n", | |
1735 | irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, | |
1736 | irb->ecw[1] & 0x10 ? "" : "no"); | |
1da177e4 LT |
1737 | } else { |
1738 | /* 32 Byte Sense Data */ | |
445b5b49 HH |
1739 | sprintf(page + len, KERN_ERR PRINTK_HEADER |
1740 | " 32 Byte: Format: %x " | |
1741 | "Exception class %x\n", | |
1742 | irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); | |
1da177e4 LT |
1743 | } |
1744 | } else { | |
445b5b49 HH |
1745 | sprintf(page + len, KERN_ERR PRINTK_HEADER |
1746 | " SORRY - NO VALID SENSE AVAILABLE\n"); | |
1da177e4 | 1747 | } |
445b5b49 HH |
1748 | printk("%s", page); |
1749 | ||
1750 | /* dump the Channel Program (max 140 Bytes per line) */ | |
1751 | /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ | |
1752 | first = req->cpaddr; | |
1753 | for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); | |
1754 | to = min(first + 6, last); | |
1755 | len = sprintf(page, KERN_ERR PRINTK_HEADER | |
1da177e4 | 1756 | " Related CP in req: %p\n", req); |
445b5b49 HH |
1757 | dasd_eckd_dump_ccw_range(first, to, page + len); |
1758 | printk("%s", page); | |
1da177e4 | 1759 | |
445b5b49 HH |
1760 | /* print failing CCW area (maximum 4) */ |
1761 | /* scsw->cda is either valid or zero */ | |
1da177e4 | 1762 | len = 0; |
445b5b49 HH |
1763 | from = ++to; |
1764 | fail = (struct ccw1 *)(addr_t) irb->scsw.cpa; /* failing CCW */ | |
1765 | if (from < fail - 2) { | |
1766 | from = fail - 2; /* there is a gap - print header */ | |
1767 | len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n"); | |
1da177e4 | 1768 | } |
445b5b49 HH |
1769 | to = min(fail + 1, last); |
1770 | len += dasd_eckd_dump_ccw_range(from, to, page + len); | |
1da177e4 | 1771 | |
445b5b49 HH |
1772 | /* print last CCWs (maximum 2) */ |
1773 | from = max(from, ++to); | |
1774 | if (from < last - 1) { | |
1775 | from = last - 1; /* there is a gap - print header */ | |
1da177e4 LT |
1776 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n"); |
1777 | } | |
445b5b49 | 1778 | len += dasd_eckd_dump_ccw_range(from, last, page + len); |
1da177e4 | 1779 | if (len > 0) |
445b5b49 | 1780 | printk("%s", page); |
1da177e4 LT |
1781 | free_page((unsigned long) page); |
1782 | } | |
1783 | ||
1784 | /* | |
1785 | * max_blocks is dependent on the amount of storage that is available | |
1786 | * in the static io buffer for each device. Currently each device has | |
1787 | * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has | |
1788 | * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use | |
1789 | * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In | |
1790 | * addition we have one define extent ccw + 16 bytes of data and one | |
1791 | * locate record ccw + 16 bytes of data. That makes: | |
1792 | * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. | |
1793 | * We want to fit two into the available memory so that we can immediately | |
1794 | * start the next request if one finishes off. That makes 249.5 blocks | |
1795 | * for one request. Give a little safety and the result is 240. | |
1796 | */ | |
1797 | static struct dasd_discipline dasd_eckd_discipline = { | |
1798 | .owner = THIS_MODULE, | |
1799 | .name = "ECKD", | |
1800 | .ebcname = "ECKD", | |
1801 | .max_blocks = 240, | |
1802 | .check_device = dasd_eckd_check_characteristics, | |
1803 | .do_analysis = dasd_eckd_do_analysis, | |
1804 | .fill_geometry = dasd_eckd_fill_geometry, | |
1805 | .start_IO = dasd_start_IO, | |
1806 | .term_IO = dasd_term_IO, | |
1807 | .format_device = dasd_eckd_format_device, | |
1808 | .examine_error = dasd_eckd_examine_error, | |
1809 | .erp_action = dasd_eckd_erp_action, | |
1810 | .erp_postaction = dasd_eckd_erp_postaction, | |
1811 | .build_cp = dasd_eckd_build_cp, | |
1812 | .free_cp = dasd_eckd_free_cp, | |
1813 | .dump_sense = dasd_eckd_dump_sense, | |
1814 | .fill_info = dasd_eckd_fill_info, | |
1107ccfb | 1815 | .ioctl = dasd_eckd_ioctl, |
1da177e4 LT |
1816 | }; |
1817 | ||
1818 | static int __init | |
1819 | dasd_eckd_init(void) | |
1820 | { | |
1da177e4 | 1821 | ASCEBC(dasd_eckd_discipline.ebcname, 4); |
40545573 | 1822 | return ccw_driver_register(&dasd_eckd_driver); |
1da177e4 LT |
1823 | } |
1824 | ||
1825 | static void __exit | |
1826 | dasd_eckd_cleanup(void) | |
1827 | { | |
1828 | ccw_driver_unregister(&dasd_eckd_driver); | |
1da177e4 LT |
1829 | } |
1830 | ||
1831 | module_init(dasd_eckd_init); | |
1832 | module_exit(dasd_eckd_cleanup); |