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1da177e4 LT |
1 | /* |
2 | * File...........: linux/drivers/s390/block/dasd_eckd.c | |
3 | * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> | |
4 | * Horst Hummel <Horst.Hummel@de.ibm.com> | |
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 | ||
12 | #include <linux/config.h> | |
13 | #include <linux/stddef.h> | |
14 | #include <linux/kernel.h> | |
15 | #include <linux/slab.h> | |
16 | #include <linux/hdreg.h> /* HDIO_GETGEO */ | |
17 | #include <linux/bio.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/init.h> | |
20 | ||
21 | #include <asm/debug.h> | |
22 | #include <asm/idals.h> | |
23 | #include <asm/ebcdic.h> | |
24 | #include <asm/io.h> | |
25 | #include <asm/todclk.h> | |
26 | #include <asm/uaccess.h> | |
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[] = { | |
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}, | |
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 | ||
92 | ret = dasd_generic_probe (cdev, &dasd_eckd_discipline); | |
93 | if (ret) | |
94 | return ret; | |
95 | ccw_device_set_options(cdev, CCWDEV_DO_PATHGROUP | CCWDEV_ALLOW_FORCE); | |
96 | return 0; | |
97 | } | |
98 | ||
99 | static int | |
100 | dasd_eckd_set_online(struct ccw_device *cdev) | |
101 | { | |
102 | return dasd_generic_set_online (cdev, &dasd_eckd_discipline); | |
103 | } | |
104 | ||
105 | static struct ccw_driver dasd_eckd_driver = { | |
106 | .name = "dasd-eckd", | |
107 | .owner = THIS_MODULE, | |
108 | .ids = dasd_eckd_ids, | |
109 | .probe = dasd_eckd_probe, | |
110 | .remove = dasd_generic_remove, | |
111 | .set_offline = dasd_generic_set_offline, | |
112 | .set_online = dasd_eckd_set_online, | |
113 | .notify = dasd_generic_notify, | |
114 | }; | |
115 | ||
116 | static const int sizes_trk0[] = { 28, 148, 84 }; | |
117 | #define LABEL_SIZE 140 | |
118 | ||
119 | static inline unsigned int | |
120 | round_up_multiple(unsigned int no, unsigned int mult) | |
121 | { | |
122 | int rem = no % mult; | |
123 | return (rem ? no - rem + mult : no); | |
124 | } | |
125 | ||
126 | static inline unsigned int | |
127 | ceil_quot(unsigned int d1, unsigned int d2) | |
128 | { | |
129 | return (d1 + (d2 - 1)) / d2; | |
130 | } | |
131 | ||
132 | static inline int | |
133 | bytes_per_record(struct dasd_eckd_characteristics *rdc, int kl, int dl) | |
134 | { | |
135 | unsigned int fl1, fl2, int1, int2; | |
136 | int bpr; | |
137 | ||
138 | switch (rdc->formula) { | |
139 | case 0x01: | |
140 | fl1 = round_up_multiple(ECKD_F2(rdc) + dl, ECKD_F1(rdc)); | |
141 | fl2 = round_up_multiple(kl ? ECKD_F2(rdc) + kl : 0, | |
142 | ECKD_F1(rdc)); | |
143 | bpr = fl1 + fl2; | |
144 | break; | |
145 | case 0x02: | |
146 | int1 = ceil_quot(dl + ECKD_F6(rdc), ECKD_F5(rdc) << 1); | |
147 | int2 = ceil_quot(kl + ECKD_F6(rdc), ECKD_F5(rdc) << 1); | |
148 | fl1 = round_up_multiple(ECKD_F1(rdc) * ECKD_F2(rdc) + dl + | |
149 | ECKD_F6(rdc) + ECKD_F4(rdc) * int1, | |
150 | ECKD_F1(rdc)); | |
151 | fl2 = round_up_multiple(ECKD_F1(rdc) * ECKD_F3(rdc) + kl + | |
152 | ECKD_F6(rdc) + ECKD_F4(rdc) * int2, | |
153 | ECKD_F1(rdc)); | |
154 | bpr = fl1 + fl2; | |
155 | break; | |
156 | default: | |
157 | bpr = 0; | |
158 | break; | |
159 | } | |
160 | return bpr; | |
161 | } | |
162 | ||
163 | static inline unsigned int | |
164 | bytes_per_track(struct dasd_eckd_characteristics *rdc) | |
165 | { | |
166 | return *(unsigned int *) (rdc->byte_per_track) >> 8; | |
167 | } | |
168 | ||
169 | static inline unsigned int | |
170 | recs_per_track(struct dasd_eckd_characteristics * rdc, | |
171 | unsigned int kl, unsigned int dl) | |
172 | { | |
173 | int dn, kn; | |
174 | ||
175 | switch (rdc->dev_type) { | |
176 | case 0x3380: | |
177 | if (kl) | |
178 | return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + | |
179 | ceil_quot(dl + 12, 32)); | |
180 | else | |
181 | return 1499 / (15 + ceil_quot(dl + 12, 32)); | |
182 | case 0x3390: | |
183 | dn = ceil_quot(dl + 6, 232) + 1; | |
184 | if (kl) { | |
185 | kn = ceil_quot(kl + 6, 232) + 1; | |
186 | return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + | |
187 | 9 + ceil_quot(dl + 6 * dn, 34)); | |
188 | } else | |
189 | return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); | |
190 | case 0x9345: | |
191 | dn = ceil_quot(dl + 6, 232) + 1; | |
192 | if (kl) { | |
193 | kn = ceil_quot(kl + 6, 232) + 1; | |
194 | return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + | |
195 | ceil_quot(dl + 6 * dn, 34)); | |
196 | } else | |
197 | return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); | |
198 | } | |
199 | return 0; | |
200 | } | |
201 | ||
202 | static inline void | |
203 | check_XRC (struct ccw1 *de_ccw, | |
204 | struct DE_eckd_data *data, | |
205 | struct dasd_device *device) | |
206 | { | |
207 | struct dasd_eckd_private *private; | |
208 | ||
209 | private = (struct dasd_eckd_private *) device->private; | |
210 | ||
211 | /* switch on System Time Stamp - needed for XRC Support */ | |
212 | if (private->rdc_data.facilities.XRC_supported) { | |
213 | ||
214 | data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ | |
215 | data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ | |
216 | ||
217 | data->ep_sys_time = get_clock (); | |
218 | ||
219 | de_ccw->count = sizeof (struct DE_eckd_data); | |
220 | de_ccw->flags |= CCW_FLAG_SLI; | |
221 | } | |
222 | ||
223 | return; | |
224 | ||
225 | } /* end check_XRC */ | |
226 | ||
227 | static inline void | |
228 | define_extent(struct ccw1 * ccw, struct DE_eckd_data * data, int trk, | |
229 | int totrk, int cmd, struct dasd_device * device) | |
230 | { | |
231 | struct dasd_eckd_private *private; | |
232 | struct ch_t geo, beg, end; | |
233 | ||
234 | private = (struct dasd_eckd_private *) device->private; | |
235 | ||
236 | ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; | |
237 | ccw->flags = 0; | |
238 | ccw->count = 16; | |
239 | ccw->cda = (__u32) __pa(data); | |
240 | ||
241 | memset(data, 0, sizeof (struct DE_eckd_data)); | |
242 | switch (cmd) { | |
243 | case DASD_ECKD_CCW_READ_HOME_ADDRESS: | |
244 | case DASD_ECKD_CCW_READ_RECORD_ZERO: | |
245 | case DASD_ECKD_CCW_READ: | |
246 | case DASD_ECKD_CCW_READ_MT: | |
247 | case DASD_ECKD_CCW_READ_CKD: | |
248 | case DASD_ECKD_CCW_READ_CKD_MT: | |
249 | case DASD_ECKD_CCW_READ_KD: | |
250 | case DASD_ECKD_CCW_READ_KD_MT: | |
251 | case DASD_ECKD_CCW_READ_COUNT: | |
252 | data->mask.perm = 0x1; | |
253 | data->attributes.operation = private->attrib.operation; | |
254 | break; | |
255 | case DASD_ECKD_CCW_WRITE: | |
256 | case DASD_ECKD_CCW_WRITE_MT: | |
257 | case DASD_ECKD_CCW_WRITE_KD: | |
258 | case DASD_ECKD_CCW_WRITE_KD_MT: | |
259 | data->mask.perm = 0x02; | |
260 | data->attributes.operation = private->attrib.operation; | |
261 | check_XRC (ccw, data, device); | |
262 | break; | |
263 | case DASD_ECKD_CCW_WRITE_CKD: | |
264 | case DASD_ECKD_CCW_WRITE_CKD_MT: | |
265 | data->attributes.operation = DASD_BYPASS_CACHE; | |
266 | check_XRC (ccw, data, device); | |
267 | break; | |
268 | case DASD_ECKD_CCW_ERASE: | |
269 | case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: | |
270 | case DASD_ECKD_CCW_WRITE_RECORD_ZERO: | |
271 | data->mask.perm = 0x3; | |
272 | data->mask.auth = 0x1; | |
273 | data->attributes.operation = DASD_BYPASS_CACHE; | |
274 | check_XRC (ccw, data, device); | |
275 | break; | |
276 | default: | |
277 | DEV_MESSAGE(KERN_ERR, device, "unknown opcode 0x%x", cmd); | |
278 | break; | |
279 | } | |
280 | ||
281 | data->attributes.mode = 0x3; /* ECKD */ | |
282 | ||
283 | if ((private->rdc_data.cu_type == 0x2105 || | |
284 | private->rdc_data.cu_type == 0x2107 || | |
285 | private->rdc_data.cu_type == 0x1750) | |
286 | && !(private->uses_cdl && trk < 2)) | |
287 | data->ga_extended |= 0x40; /* Regular Data Format Mode */ | |
288 | ||
289 | geo.cyl = private->rdc_data.no_cyl; | |
290 | geo.head = private->rdc_data.trk_per_cyl; | |
291 | beg.cyl = trk / geo.head; | |
292 | beg.head = trk % geo.head; | |
293 | end.cyl = totrk / geo.head; | |
294 | end.head = totrk % geo.head; | |
295 | ||
296 | /* check for sequential prestage - enhance cylinder range */ | |
297 | if (data->attributes.operation == DASD_SEQ_PRESTAGE || | |
298 | data->attributes.operation == DASD_SEQ_ACCESS) { | |
299 | ||
300 | if (end.cyl + private->attrib.nr_cyl < geo.cyl) | |
301 | end.cyl += private->attrib.nr_cyl; | |
302 | else | |
303 | end.cyl = (geo.cyl - 1); | |
304 | } | |
305 | ||
306 | data->beg_ext.cyl = beg.cyl; | |
307 | data->beg_ext.head = beg.head; | |
308 | data->end_ext.cyl = end.cyl; | |
309 | data->end_ext.head = end.head; | |
310 | } | |
311 | ||
312 | static inline void | |
313 | locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, int trk, | |
314 | int rec_on_trk, int no_rec, int cmd, | |
315 | struct dasd_device * device, int reclen) | |
316 | { | |
317 | struct dasd_eckd_private *private; | |
318 | int sector; | |
319 | int dn, d; | |
320 | ||
321 | private = (struct dasd_eckd_private *) device->private; | |
322 | ||
323 | DBF_DEV_EVENT(DBF_INFO, device, | |
324 | "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", | |
325 | trk, rec_on_trk, no_rec, cmd, reclen); | |
326 | ||
327 | ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; | |
328 | ccw->flags = 0; | |
329 | ccw->count = 16; | |
330 | ccw->cda = (__u32) __pa(data); | |
331 | ||
332 | memset(data, 0, sizeof (struct LO_eckd_data)); | |
333 | sector = 0; | |
334 | if (rec_on_trk) { | |
335 | switch (private->rdc_data.dev_type) { | |
336 | case 0x3390: | |
337 | dn = ceil_quot(reclen + 6, 232); | |
338 | d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); | |
339 | sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; | |
340 | break; | |
341 | case 0x3380: | |
342 | d = 7 + ceil_quot(reclen + 12, 32); | |
343 | sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; | |
344 | break; | |
345 | } | |
346 | } | |
347 | data->sector = sector; | |
348 | data->count = no_rec; | |
349 | switch (cmd) { | |
350 | case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: | |
351 | data->operation.orientation = 0x3; | |
352 | data->operation.operation = 0x03; | |
353 | break; | |
354 | case DASD_ECKD_CCW_READ_HOME_ADDRESS: | |
355 | data->operation.orientation = 0x3; | |
356 | data->operation.operation = 0x16; | |
357 | break; | |
358 | case DASD_ECKD_CCW_WRITE_RECORD_ZERO: | |
359 | data->operation.orientation = 0x1; | |
360 | data->operation.operation = 0x03; | |
361 | data->count++; | |
362 | break; | |
363 | case DASD_ECKD_CCW_READ_RECORD_ZERO: | |
364 | data->operation.orientation = 0x3; | |
365 | data->operation.operation = 0x16; | |
366 | data->count++; | |
367 | break; | |
368 | case DASD_ECKD_CCW_WRITE: | |
369 | case DASD_ECKD_CCW_WRITE_MT: | |
370 | case DASD_ECKD_CCW_WRITE_KD: | |
371 | case DASD_ECKD_CCW_WRITE_KD_MT: | |
372 | data->auxiliary.last_bytes_used = 0x1; | |
373 | data->length = reclen; | |
374 | data->operation.operation = 0x01; | |
375 | break; | |
376 | case DASD_ECKD_CCW_WRITE_CKD: | |
377 | case DASD_ECKD_CCW_WRITE_CKD_MT: | |
378 | data->auxiliary.last_bytes_used = 0x1; | |
379 | data->length = reclen; | |
380 | data->operation.operation = 0x03; | |
381 | break; | |
382 | case DASD_ECKD_CCW_READ: | |
383 | case DASD_ECKD_CCW_READ_MT: | |
384 | case DASD_ECKD_CCW_READ_KD: | |
385 | case DASD_ECKD_CCW_READ_KD_MT: | |
386 | data->auxiliary.last_bytes_used = 0x1; | |
387 | data->length = reclen; | |
388 | data->operation.operation = 0x06; | |
389 | break; | |
390 | case DASD_ECKD_CCW_READ_CKD: | |
391 | case DASD_ECKD_CCW_READ_CKD_MT: | |
392 | data->auxiliary.last_bytes_used = 0x1; | |
393 | data->length = reclen; | |
394 | data->operation.operation = 0x16; | |
395 | break; | |
396 | case DASD_ECKD_CCW_READ_COUNT: | |
397 | data->operation.operation = 0x06; | |
398 | break; | |
399 | case DASD_ECKD_CCW_ERASE: | |
400 | data->length = reclen; | |
401 | data->auxiliary.last_bytes_used = 0x1; | |
402 | data->operation.operation = 0x0b; | |
403 | break; | |
404 | default: | |
405 | DEV_MESSAGE(KERN_ERR, device, "unknown opcode 0x%x", cmd); | |
406 | } | |
407 | data->seek_addr.cyl = data->search_arg.cyl = | |
408 | trk / private->rdc_data.trk_per_cyl; | |
409 | data->seek_addr.head = data->search_arg.head = | |
410 | trk % private->rdc_data.trk_per_cyl; | |
411 | data->search_arg.record = rec_on_trk; | |
412 | } | |
413 | ||
414 | /* | |
415 | * Returns 1 if the block is one of the special blocks that needs | |
416 | * to get read/written with the KD variant of the command. | |
417 | * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and | |
418 | * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. | |
419 | * Luckily the KD variants differ only by one bit (0x08) from the | |
420 | * normal variant. So don't wonder about code like: | |
421 | * if (dasd_eckd_cdl_special(blk_per_trk, recid)) | |
422 | * ccw->cmd_code |= 0x8; | |
423 | */ | |
424 | static inline int | |
425 | dasd_eckd_cdl_special(int blk_per_trk, int recid) | |
426 | { | |
427 | if (recid < 3) | |
428 | return 1; | |
429 | if (recid < blk_per_trk) | |
430 | return 0; | |
431 | if (recid < 2 * blk_per_trk) | |
432 | return 1; | |
433 | return 0; | |
434 | } | |
435 | ||
436 | /* | |
437 | * Returns the record size for the special blocks of the cdl format. | |
438 | * Only returns something useful if dasd_eckd_cdl_special is true | |
439 | * for the recid. | |
440 | */ | |
441 | static inline int | |
442 | dasd_eckd_cdl_reclen(int recid) | |
443 | { | |
444 | if (recid < 3) | |
445 | return sizes_trk0[recid]; | |
446 | return LABEL_SIZE; | |
447 | } | |
448 | ||
3d052595 HH |
449 | /* |
450 | * Generate device unique id that specifies the physical device. | |
451 | */ | |
452 | static int | |
453 | dasd_eckd_generate_uid(struct dasd_device *device, struct dasd_uid *uid) | |
454 | { | |
455 | struct dasd_eckd_private *private; | |
456 | struct dasd_eckd_confdata *confdata; | |
457 | ||
458 | private = (struct dasd_eckd_private *) device->private; | |
459 | if (!private) | |
460 | return -ENODEV; | |
461 | confdata = &private->conf_data; | |
462 | if (!confdata) | |
463 | return -ENODEV; | |
464 | ||
465 | memset(uid, 0, sizeof(struct dasd_uid)); | |
466 | strncpy(uid->vendor, confdata->ned1.HDA_manufacturer, | |
467 | sizeof(uid->vendor) - 1); | |
468 | EBCASC(uid->vendor, sizeof(uid->vendor) - 1); | |
469 | strncpy(uid->serial, confdata->ned1.HDA_location, | |
470 | sizeof(uid->serial) - 1); | |
471 | EBCASC(uid->serial, sizeof(uid->serial) - 1); | |
472 | uid->ssid = confdata->neq.subsystemID; | |
473 | if (confdata->ned2.sneq.flags == 0x40) { | |
474 | uid->alias = 1; | |
475 | uid->unit_addr = confdata->ned2.sneq.base_unit_addr; | |
476 | } else | |
477 | uid->unit_addr = confdata->ned1.unit_addr; | |
478 | ||
479 | return 0; | |
480 | } | |
481 | ||
1da177e4 LT |
482 | static int |
483 | dasd_eckd_read_conf(struct dasd_device *device) | |
484 | { | |
485 | void *conf_data; | |
486 | int conf_len, conf_data_saved; | |
487 | int rc; | |
488 | __u8 lpm; | |
489 | struct dasd_eckd_private *private; | |
490 | struct dasd_eckd_path *path_data; | |
491 | ||
492 | private = (struct dasd_eckd_private *) device->private; | |
493 | path_data = (struct dasd_eckd_path *) &private->path_data; | |
494 | path_data->opm = ccw_device_get_path_mask(device->cdev); | |
495 | lpm = 0x80; | |
496 | conf_data_saved = 0; | |
497 | ||
498 | /* get configuration data per operational path */ | |
499 | for (lpm = 0x80; lpm; lpm>>= 1) { | |
500 | if (lpm & path_data->opm){ | |
501 | rc = read_conf_data_lpm(device->cdev, &conf_data, | |
502 | &conf_len, lpm); | |
503 | if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ | |
504 | MESSAGE(KERN_WARNING, | |
505 | "Read configuration data returned " | |
506 | "error %d", rc); | |
507 | return rc; | |
508 | } | |
509 | if (conf_data == NULL) { | |
510 | MESSAGE(KERN_WARNING, "%s", "No configuration " | |
511 | "data retrieved"); | |
512 | continue; /* no errror */ | |
513 | } | |
514 | if (conf_len != sizeof (struct dasd_eckd_confdata)) { | |
515 | MESSAGE(KERN_WARNING, | |
516 | "sizes of configuration data mismatch" | |
517 | "%d (read) vs %ld (expected)", | |
518 | conf_len, | |
519 | sizeof (struct dasd_eckd_confdata)); | |
520 | kfree(conf_data); | |
521 | continue; /* no errror */ | |
522 | } | |
523 | /* save first valid configuration data */ | |
524 | if (!conf_data_saved){ | |
525 | memcpy(&private->conf_data, conf_data, | |
526 | sizeof (struct dasd_eckd_confdata)); | |
527 | conf_data_saved++; | |
528 | } | |
529 | switch (((char *)conf_data)[242] & 0x07){ | |
530 | case 0x02: | |
531 | path_data->npm |= lpm; | |
532 | break; | |
533 | case 0x03: | |
534 | path_data->ppm |= lpm; | |
535 | break; | |
536 | } | |
537 | kfree(conf_data); | |
538 | } | |
539 | } | |
540 | return 0; | |
541 | } | |
542 | ||
3d052595 HH |
543 | /* |
544 | * Check device characteristics. | |
545 | * If the device is accessible using ECKD discipline, the device is enabled. | |
546 | */ | |
1da177e4 LT |
547 | static int |
548 | dasd_eckd_check_characteristics(struct dasd_device *device) | |
549 | { | |
550 | struct dasd_eckd_private *private; | |
3d052595 | 551 | struct dasd_uid uid; |
1da177e4 LT |
552 | void *rdc_data; |
553 | int rc; | |
554 | ||
555 | private = (struct dasd_eckd_private *) device->private; | |
556 | if (private == NULL) { | |
557 | private = kmalloc(sizeof(struct dasd_eckd_private), | |
558 | GFP_KERNEL | GFP_DMA); | |
559 | if (private == NULL) { | |
560 | DEV_MESSAGE(KERN_WARNING, device, "%s", | |
561 | "memory allocation failed for private " | |
562 | "data"); | |
563 | return -ENOMEM; | |
564 | } | |
565 | memset(private, 0, sizeof(struct dasd_eckd_private)); | |
566 | device->private = (void *) private; | |
567 | } | |
568 | /* Invalidate status of initial analysis. */ | |
569 | private->init_cqr_status = -1; | |
570 | /* Set default cache operations. */ | |
571 | private->attrib.operation = DASD_NORMAL_CACHE; | |
572 | private->attrib.nr_cyl = 0; | |
573 | ||
574 | /* Read Device Characteristics */ | |
575 | rdc_data = (void *) &(private->rdc_data); | |
3d052595 | 576 | memset(rdc_data, 0, sizeof(rdc_data)); |
1da177e4 LT |
577 | rc = read_dev_chars(device->cdev, &rdc_data, 64); |
578 | if (rc) { | |
579 | DEV_MESSAGE(KERN_WARNING, device, | |
580 | "Read device characteristics returned error %d", | |
581 | rc); | |
582 | return rc; | |
583 | } | |
584 | ||
585 | DEV_MESSAGE(KERN_INFO, device, | |
586 | "%04X/%02X(CU:%04X/%02X) Cyl:%d Head:%d Sec:%d", | |
587 | private->rdc_data.dev_type, | |
588 | private->rdc_data.dev_model, | |
589 | private->rdc_data.cu_type, | |
590 | private->rdc_data.cu_model.model, | |
591 | private->rdc_data.no_cyl, | |
592 | private->rdc_data.trk_per_cyl, | |
593 | private->rdc_data.sec_per_trk); | |
594 | ||
595 | /* Read Configuration Data */ | |
596 | rc = dasd_eckd_read_conf (device); | |
3d052595 HH |
597 | if (rc) |
598 | return rc; | |
599 | ||
600 | /* Generate device unique id and register in devmap */ | |
601 | rc = dasd_eckd_generate_uid(device, &uid); | |
602 | if (rc) | |
603 | return rc; | |
1da177e4 | 604 | |
3d052595 HH |
605 | rc = dasd_set_uid(device->cdev, &uid); |
606 | ||
607 | return rc; | |
1da177e4 LT |
608 | } |
609 | ||
610 | static struct dasd_ccw_req * | |
611 | dasd_eckd_analysis_ccw(struct dasd_device *device) | |
612 | { | |
613 | struct dasd_eckd_private *private; | |
614 | struct eckd_count *count_data; | |
615 | struct LO_eckd_data *LO_data; | |
616 | struct dasd_ccw_req *cqr; | |
617 | struct ccw1 *ccw; | |
618 | int cplength, datasize; | |
619 | int i; | |
620 | ||
621 | private = (struct dasd_eckd_private *) device->private; | |
622 | ||
623 | cplength = 8; | |
624 | datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); | |
625 | cqr = dasd_smalloc_request(dasd_eckd_discipline.name, | |
626 | cplength, datasize, device); | |
627 | if (IS_ERR(cqr)) | |
628 | return cqr; | |
629 | ccw = cqr->cpaddr; | |
630 | /* Define extent for the first 3 tracks. */ | |
631 | define_extent(ccw++, cqr->data, 0, 2, | |
632 | DASD_ECKD_CCW_READ_COUNT, device); | |
633 | LO_data = cqr->data + sizeof (struct DE_eckd_data); | |
634 | /* Locate record for the first 4 records on track 0. */ | |
635 | ccw[-1].flags |= CCW_FLAG_CC; | |
636 | locate_record(ccw++, LO_data++, 0, 0, 4, | |
637 | DASD_ECKD_CCW_READ_COUNT, device, 0); | |
638 | ||
639 | count_data = private->count_area; | |
640 | for (i = 0; i < 4; i++) { | |
641 | ccw[-1].flags |= CCW_FLAG_CC; | |
642 | ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; | |
643 | ccw->flags = 0; | |
644 | ccw->count = 8; | |
645 | ccw->cda = (__u32)(addr_t) count_data; | |
646 | ccw++; | |
647 | count_data++; | |
648 | } | |
649 | ||
650 | /* Locate record for the first record on track 2. */ | |
651 | ccw[-1].flags |= CCW_FLAG_CC; | |
652 | locate_record(ccw++, LO_data++, 2, 0, 1, | |
653 | DASD_ECKD_CCW_READ_COUNT, device, 0); | |
654 | /* Read count ccw. */ | |
655 | ccw[-1].flags |= CCW_FLAG_CC; | |
656 | ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; | |
657 | ccw->flags = 0; | |
658 | ccw->count = 8; | |
659 | ccw->cda = (__u32)(addr_t) count_data; | |
660 | ||
661 | cqr->device = device; | |
662 | cqr->retries = 0; | |
663 | cqr->buildclk = get_clock(); | |
664 | cqr->status = DASD_CQR_FILLED; | |
665 | return cqr; | |
666 | } | |
667 | ||
668 | /* | |
669 | * This is the callback function for the init_analysis cqr. It saves | |
670 | * the status of the initial analysis ccw before it frees it and kicks | |
671 | * the device to continue the startup sequence. This will call | |
672 | * dasd_eckd_do_analysis again (if the devices has not been marked | |
673 | * for deletion in the meantime). | |
674 | */ | |
675 | static void | |
676 | dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, void *data) | |
677 | { | |
678 | struct dasd_eckd_private *private; | |
679 | struct dasd_device *device; | |
680 | ||
681 | device = init_cqr->device; | |
682 | private = (struct dasd_eckd_private *) device->private; | |
683 | private->init_cqr_status = init_cqr->status; | |
684 | dasd_sfree_request(init_cqr, device); | |
685 | dasd_kick_device(device); | |
686 | } | |
687 | ||
688 | static int | |
689 | dasd_eckd_start_analysis(struct dasd_device *device) | |
690 | { | |
691 | struct dasd_eckd_private *private; | |
692 | struct dasd_ccw_req *init_cqr; | |
693 | ||
694 | private = (struct dasd_eckd_private *) device->private; | |
695 | init_cqr = dasd_eckd_analysis_ccw(device); | |
696 | if (IS_ERR(init_cqr)) | |
697 | return PTR_ERR(init_cqr); | |
698 | init_cqr->callback = dasd_eckd_analysis_callback; | |
699 | init_cqr->callback_data = NULL; | |
700 | init_cqr->expires = 5*HZ; | |
701 | dasd_add_request_head(init_cqr); | |
702 | return -EAGAIN; | |
703 | } | |
704 | ||
705 | static int | |
706 | dasd_eckd_end_analysis(struct dasd_device *device) | |
707 | { | |
708 | struct dasd_eckd_private *private; | |
709 | struct eckd_count *count_area; | |
710 | unsigned int sb, blk_per_trk; | |
711 | int status, i; | |
712 | ||
713 | private = (struct dasd_eckd_private *) device->private; | |
714 | status = private->init_cqr_status; | |
715 | private->init_cqr_status = -1; | |
716 | if (status != DASD_CQR_DONE) { | |
717 | DEV_MESSAGE(KERN_WARNING, device, "%s", | |
718 | "volume analysis returned unformatted disk"); | |
719 | return -EMEDIUMTYPE; | |
720 | } | |
721 | ||
722 | private->uses_cdl = 1; | |
723 | /* Calculate number of blocks/records per track. */ | |
724 | blk_per_trk = recs_per_track(&private->rdc_data, 0, device->bp_block); | |
725 | /* Check Track 0 for Compatible Disk Layout */ | |
726 | count_area = NULL; | |
727 | for (i = 0; i < 3; i++) { | |
728 | if (private->count_area[i].kl != 4 || | |
729 | private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) { | |
730 | private->uses_cdl = 0; | |
731 | break; | |
732 | } | |
733 | } | |
734 | if (i == 3) | |
735 | count_area = &private->count_area[4]; | |
736 | ||
737 | if (private->uses_cdl == 0) { | |
738 | for (i = 0; i < 5; i++) { | |
739 | if ((private->count_area[i].kl != 0) || | |
740 | (private->count_area[i].dl != | |
741 | private->count_area[0].dl)) | |
742 | break; | |
743 | } | |
744 | if (i == 5) | |
745 | count_area = &private->count_area[0]; | |
746 | } else { | |
747 | if (private->count_area[3].record == 1) | |
748 | DEV_MESSAGE(KERN_WARNING, device, "%s", | |
749 | "Trk 0: no records after VTOC!"); | |
750 | } | |
751 | if (count_area != NULL && count_area->kl == 0) { | |
752 | /* we found notthing violating our disk layout */ | |
753 | if (dasd_check_blocksize(count_area->dl) == 0) | |
754 | device->bp_block = count_area->dl; | |
755 | } | |
756 | if (device->bp_block == 0) { | |
757 | DEV_MESSAGE(KERN_WARNING, device, "%s", | |
758 | "Volume has incompatible disk layout"); | |
759 | return -EMEDIUMTYPE; | |
760 | } | |
761 | device->s2b_shift = 0; /* bits to shift 512 to get a block */ | |
762 | for (sb = 512; sb < device->bp_block; sb = sb << 1) | |
763 | device->s2b_shift++; | |
764 | ||
765 | blk_per_trk = recs_per_track(&private->rdc_data, 0, device->bp_block); | |
766 | device->blocks = (private->rdc_data.no_cyl * | |
767 | private->rdc_data.trk_per_cyl * | |
768 | blk_per_trk); | |
769 | ||
770 | DEV_MESSAGE(KERN_INFO, device, | |
771 | "(%dkB blks): %dkB at %dkB/trk %s", | |
772 | (device->bp_block >> 10), | |
773 | ((private->rdc_data.no_cyl * | |
774 | private->rdc_data.trk_per_cyl * | |
775 | blk_per_trk * (device->bp_block >> 9)) >> 1), | |
776 | ((blk_per_trk * device->bp_block) >> 10), | |
777 | private->uses_cdl ? | |
778 | "compatible disk layout" : "linux disk layout"); | |
779 | ||
780 | return 0; | |
781 | } | |
782 | ||
783 | static int | |
784 | dasd_eckd_do_analysis(struct dasd_device *device) | |
785 | { | |
786 | struct dasd_eckd_private *private; | |
787 | ||
788 | private = (struct dasd_eckd_private *) device->private; | |
789 | if (private->init_cqr_status < 0) | |
790 | return dasd_eckd_start_analysis(device); | |
791 | else | |
792 | return dasd_eckd_end_analysis(device); | |
793 | } | |
794 | ||
795 | static int | |
796 | dasd_eckd_fill_geometry(struct dasd_device *device, struct hd_geometry *geo) | |
797 | { | |
798 | struct dasd_eckd_private *private; | |
799 | ||
800 | private = (struct dasd_eckd_private *) device->private; | |
801 | if (dasd_check_blocksize(device->bp_block) == 0) { | |
802 | geo->sectors = recs_per_track(&private->rdc_data, | |
803 | 0, device->bp_block); | |
804 | } | |
805 | geo->cylinders = private->rdc_data.no_cyl; | |
806 | geo->heads = private->rdc_data.trk_per_cyl; | |
807 | return 0; | |
808 | } | |
809 | ||
810 | static struct dasd_ccw_req * | |
811 | dasd_eckd_format_device(struct dasd_device * device, | |
812 | struct format_data_t * fdata) | |
813 | { | |
814 | struct dasd_eckd_private *private; | |
815 | struct dasd_ccw_req *fcp; | |
816 | struct eckd_count *ect; | |
817 | struct ccw1 *ccw; | |
818 | void *data; | |
819 | int rpt, cyl, head; | |
820 | int cplength, datasize; | |
821 | int i; | |
822 | ||
823 | private = (struct dasd_eckd_private *) device->private; | |
824 | rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize); | |
825 | cyl = fdata->start_unit / private->rdc_data.trk_per_cyl; | |
826 | head = fdata->start_unit % private->rdc_data.trk_per_cyl; | |
827 | ||
828 | /* Sanity checks. */ | |
829 | if (fdata->start_unit >= | |
830 | (private->rdc_data.no_cyl * private->rdc_data.trk_per_cyl)) { | |
831 | DEV_MESSAGE(KERN_INFO, device, "Track no %d too big!", | |
832 | fdata->start_unit); | |
833 | return ERR_PTR(-EINVAL); | |
834 | } | |
835 | if (fdata->start_unit > fdata->stop_unit) { | |
836 | DEV_MESSAGE(KERN_INFO, device, "Track %d reached! ending.", | |
837 | fdata->start_unit); | |
838 | return ERR_PTR(-EINVAL); | |
839 | } | |
840 | if (dasd_check_blocksize(fdata->blksize) != 0) { | |
841 | DEV_MESSAGE(KERN_WARNING, device, | |
842 | "Invalid blocksize %d...terminating!", | |
843 | fdata->blksize); | |
844 | return ERR_PTR(-EINVAL); | |
845 | } | |
846 | ||
847 | /* | |
848 | * fdata->intensity is a bit string that tells us what to do: | |
849 | * Bit 0: write record zero | |
850 | * Bit 1: write home address, currently not supported | |
851 | * Bit 2: invalidate tracks | |
852 | * Bit 3: use OS/390 compatible disk layout (cdl) | |
853 | * Only some bit combinations do make sense. | |
854 | */ | |
855 | switch (fdata->intensity) { | |
856 | case 0x00: /* Normal format */ | |
857 | case 0x08: /* Normal format, use cdl. */ | |
858 | cplength = 2 + rpt; | |
859 | datasize = sizeof(struct DE_eckd_data) + | |
860 | sizeof(struct LO_eckd_data) + | |
861 | rpt * sizeof(struct eckd_count); | |
862 | break; | |
863 | case 0x01: /* Write record zero and format track. */ | |
864 | case 0x09: /* Write record zero and format track, use cdl. */ | |
865 | cplength = 3 + rpt; | |
866 | datasize = sizeof(struct DE_eckd_data) + | |
867 | sizeof(struct LO_eckd_data) + | |
868 | sizeof(struct eckd_count) + | |
869 | rpt * sizeof(struct eckd_count); | |
870 | break; | |
871 | case 0x04: /* Invalidate track. */ | |
872 | case 0x0c: /* Invalidate track, use cdl. */ | |
873 | cplength = 3; | |
874 | datasize = sizeof(struct DE_eckd_data) + | |
875 | sizeof(struct LO_eckd_data) + | |
876 | sizeof(struct eckd_count); | |
877 | break; | |
878 | default: | |
879 | DEV_MESSAGE(KERN_WARNING, device, "Invalid flags 0x%x.", | |
880 | fdata->intensity); | |
881 | return ERR_PTR(-EINVAL); | |
882 | } | |
883 | /* Allocate the format ccw request. */ | |
884 | fcp = dasd_smalloc_request(dasd_eckd_discipline.name, | |
885 | cplength, datasize, device); | |
886 | if (IS_ERR(fcp)) | |
887 | return fcp; | |
888 | ||
889 | data = fcp->data; | |
890 | ccw = fcp->cpaddr; | |
891 | ||
892 | switch (fdata->intensity & ~0x08) { | |
893 | case 0x00: /* Normal format. */ | |
894 | define_extent(ccw++, (struct DE_eckd_data *) data, | |
895 | fdata->start_unit, fdata->start_unit, | |
896 | DASD_ECKD_CCW_WRITE_CKD, device); | |
897 | data += sizeof(struct DE_eckd_data); | |
898 | ccw[-1].flags |= CCW_FLAG_CC; | |
899 | locate_record(ccw++, (struct LO_eckd_data *) data, | |
900 | fdata->start_unit, 0, rpt, | |
901 | DASD_ECKD_CCW_WRITE_CKD, device, | |
902 | fdata->blksize); | |
903 | data += sizeof(struct LO_eckd_data); | |
904 | break; | |
905 | case 0x01: /* Write record zero + format track. */ | |
906 | define_extent(ccw++, (struct DE_eckd_data *) data, | |
907 | fdata->start_unit, fdata->start_unit, | |
908 | DASD_ECKD_CCW_WRITE_RECORD_ZERO, | |
909 | device); | |
910 | data += sizeof(struct DE_eckd_data); | |
911 | ccw[-1].flags |= CCW_FLAG_CC; | |
912 | locate_record(ccw++, (struct LO_eckd_data *) data, | |
913 | fdata->start_unit, 0, rpt + 1, | |
914 | DASD_ECKD_CCW_WRITE_RECORD_ZERO, device, | |
915 | device->bp_block); | |
916 | data += sizeof(struct LO_eckd_data); | |
917 | break; | |
918 | case 0x04: /* Invalidate track. */ | |
919 | define_extent(ccw++, (struct DE_eckd_data *) data, | |
920 | fdata->start_unit, fdata->start_unit, | |
921 | DASD_ECKD_CCW_WRITE_CKD, device); | |
922 | data += sizeof(struct DE_eckd_data); | |
923 | ccw[-1].flags |= CCW_FLAG_CC; | |
924 | locate_record(ccw++, (struct LO_eckd_data *) data, | |
925 | fdata->start_unit, 0, 1, | |
926 | DASD_ECKD_CCW_WRITE_CKD, device, 8); | |
927 | data += sizeof(struct LO_eckd_data); | |
928 | break; | |
929 | } | |
930 | if (fdata->intensity & 0x01) { /* write record zero */ | |
931 | ect = (struct eckd_count *) data; | |
932 | data += sizeof(struct eckd_count); | |
933 | ect->cyl = cyl; | |
934 | ect->head = head; | |
935 | ect->record = 0; | |
936 | ect->kl = 0; | |
937 | ect->dl = 8; | |
938 | ccw[-1].flags |= CCW_FLAG_CC; | |
939 | ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; | |
940 | ccw->flags = CCW_FLAG_SLI; | |
941 | ccw->count = 8; | |
942 | ccw->cda = (__u32)(addr_t) ect; | |
943 | ccw++; | |
944 | } | |
945 | if ((fdata->intensity & ~0x08) & 0x04) { /* erase track */ | |
946 | ect = (struct eckd_count *) data; | |
947 | data += sizeof(struct eckd_count); | |
948 | ect->cyl = cyl; | |
949 | ect->head = head; | |
950 | ect->record = 1; | |
951 | ect->kl = 0; | |
952 | ect->dl = 0; | |
953 | ccw[-1].flags |= CCW_FLAG_CC; | |
954 | ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; | |
955 | ccw->flags = CCW_FLAG_SLI; | |
956 | ccw->count = 8; | |
957 | ccw->cda = (__u32)(addr_t) ect; | |
958 | } else { /* write remaining records */ | |
959 | for (i = 0; i < rpt; i++) { | |
960 | ect = (struct eckd_count *) data; | |
961 | data += sizeof(struct eckd_count); | |
962 | ect->cyl = cyl; | |
963 | ect->head = head; | |
964 | ect->record = i + 1; | |
965 | ect->kl = 0; | |
966 | ect->dl = fdata->blksize; | |
967 | /* Check for special tracks 0-1 when formatting CDL */ | |
968 | if ((fdata->intensity & 0x08) && | |
969 | fdata->start_unit == 0) { | |
970 | if (i < 3) { | |
971 | ect->kl = 4; | |
972 | ect->dl = sizes_trk0[i] - 4; | |
973 | } | |
974 | } | |
975 | if ((fdata->intensity & 0x08) && | |
976 | fdata->start_unit == 1) { | |
977 | ect->kl = 44; | |
978 | ect->dl = LABEL_SIZE - 44; | |
979 | } | |
980 | ccw[-1].flags |= CCW_FLAG_CC; | |
981 | ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; | |
982 | ccw->flags = CCW_FLAG_SLI; | |
983 | ccw->count = 8; | |
984 | ccw->cda = (__u32)(addr_t) ect; | |
985 | ccw++; | |
986 | } | |
987 | } | |
988 | fcp->device = device; | |
989 | fcp->retries = 2; /* set retry counter to enable ERP */ | |
990 | fcp->buildclk = get_clock(); | |
991 | fcp->status = DASD_CQR_FILLED; | |
992 | return fcp; | |
993 | } | |
994 | ||
995 | static dasd_era_t | |
996 | dasd_eckd_examine_error(struct dasd_ccw_req * cqr, struct irb * irb) | |
997 | { | |
998 | struct dasd_device *device = (struct dasd_device *) cqr->device; | |
999 | struct ccw_device *cdev = device->cdev; | |
1000 | ||
1001 | if (irb->scsw.cstat == 0x00 && | |
1002 | irb->scsw.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END)) | |
1003 | return dasd_era_none; | |
1004 | ||
1005 | switch (cdev->id.cu_type) { | |
1006 | case 0x3990: | |
1007 | case 0x2105: | |
1008 | case 0x2107: | |
1009 | case 0x1750: | |
1010 | return dasd_3990_erp_examine(cqr, irb); | |
1011 | case 0x9343: | |
1012 | return dasd_9343_erp_examine(cqr, irb); | |
1013 | case 0x3880: | |
1014 | default: | |
1015 | DEV_MESSAGE(KERN_WARNING, device, "%s", | |
1016 | "default (unknown CU type) - RECOVERABLE return"); | |
1017 | return dasd_era_recover; | |
1018 | } | |
1019 | } | |
1020 | ||
1021 | static dasd_erp_fn_t | |
1022 | dasd_eckd_erp_action(struct dasd_ccw_req * cqr) | |
1023 | { | |
1024 | struct dasd_device *device = (struct dasd_device *) cqr->device; | |
1025 | struct ccw_device *cdev = device->cdev; | |
1026 | ||
1027 | switch (cdev->id.cu_type) { | |
1028 | case 0x3990: | |
1029 | case 0x2105: | |
1030 | case 0x2107: | |
1031 | case 0x1750: | |
1032 | return dasd_3990_erp_action; | |
1033 | case 0x9343: | |
1034 | case 0x3880: | |
1035 | default: | |
1036 | return dasd_default_erp_action; | |
1037 | } | |
1038 | } | |
1039 | ||
1040 | static dasd_erp_fn_t | |
1041 | dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) | |
1042 | { | |
1043 | return dasd_default_erp_postaction; | |
1044 | } | |
1045 | ||
1046 | static struct dasd_ccw_req * | |
1047 | dasd_eckd_build_cp(struct dasd_device * device, struct request *req) | |
1048 | { | |
1049 | struct dasd_eckd_private *private; | |
1050 | unsigned long *idaws; | |
1051 | struct LO_eckd_data *LO_data; | |
1052 | struct dasd_ccw_req *cqr; | |
1053 | struct ccw1 *ccw; | |
1054 | struct bio *bio; | |
1055 | struct bio_vec *bv; | |
1056 | char *dst; | |
1057 | unsigned int blksize, blk_per_trk, off; | |
1058 | int count, cidaw, cplength, datasize; | |
1059 | sector_t recid, first_rec, last_rec; | |
1060 | sector_t first_trk, last_trk; | |
1061 | unsigned int first_offs, last_offs; | |
1062 | unsigned char cmd, rcmd; | |
1063 | int i; | |
1064 | ||
1065 | private = (struct dasd_eckd_private *) device->private; | |
1066 | if (rq_data_dir(req) == READ) | |
1067 | cmd = DASD_ECKD_CCW_READ_MT; | |
1068 | else if (rq_data_dir(req) == WRITE) | |
1069 | cmd = DASD_ECKD_CCW_WRITE_MT; | |
1070 | else | |
1071 | return ERR_PTR(-EINVAL); | |
1072 | /* Calculate number of blocks/records per track. */ | |
1073 | blksize = device->bp_block; | |
1074 | blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); | |
1075 | /* Calculate record id of first and last block. */ | |
1076 | first_rec = first_trk = req->sector >> device->s2b_shift; | |
1077 | first_offs = sector_div(first_trk, blk_per_trk); | |
1078 | last_rec = last_trk = | |
1079 | (req->sector + req->nr_sectors - 1) >> device->s2b_shift; | |
1080 | last_offs = sector_div(last_trk, blk_per_trk); | |
1081 | /* Check struct bio and count the number of blocks for the request. */ | |
1082 | count = 0; | |
1083 | cidaw = 0; | |
1084 | rq_for_each_bio(bio, req) { | |
1085 | bio_for_each_segment(bv, bio, i) { | |
1086 | if (bv->bv_len & (blksize - 1)) | |
1087 | /* Eckd can only do full blocks. */ | |
1088 | return ERR_PTR(-EINVAL); | |
1089 | count += bv->bv_len >> (device->s2b_shift + 9); | |
347a8dc3 | 1090 | #if defined(CONFIG_64BIT) |
1da177e4 LT |
1091 | if (idal_is_needed (page_address(bv->bv_page), |
1092 | bv->bv_len)) | |
1093 | cidaw += bv->bv_len >> (device->s2b_shift + 9); | |
1094 | #endif | |
1095 | } | |
1096 | } | |
1097 | /* Paranoia. */ | |
1098 | if (count != last_rec - first_rec + 1) | |
1099 | return ERR_PTR(-EINVAL); | |
1100 | /* 1x define extent + 1x locate record + number of blocks */ | |
1101 | cplength = 2 + count; | |
1102 | /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ | |
1103 | datasize = sizeof(struct DE_eckd_data) + sizeof(struct LO_eckd_data) + | |
1104 | cidaw * sizeof(unsigned long); | |
1105 | /* Find out the number of additional locate record ccws for cdl. */ | |
1106 | if (private->uses_cdl && first_rec < 2*blk_per_trk) { | |
1107 | if (last_rec >= 2*blk_per_trk) | |
1108 | count = 2*blk_per_trk - first_rec; | |
1109 | cplength += count; | |
1110 | datasize += count*sizeof(struct LO_eckd_data); | |
1111 | } | |
1112 | /* Allocate the ccw request. */ | |
1113 | cqr = dasd_smalloc_request(dasd_eckd_discipline.name, | |
1114 | cplength, datasize, device); | |
1115 | if (IS_ERR(cqr)) | |
1116 | return cqr; | |
1117 | ccw = cqr->cpaddr; | |
1118 | /* First ccw is define extent. */ | |
1119 | define_extent(ccw++, cqr->data, first_trk, last_trk, cmd, device); | |
1120 | /* Build locate_record+read/write/ccws. */ | |
1121 | idaws = (unsigned long *) (cqr->data + sizeof(struct DE_eckd_data)); | |
1122 | LO_data = (struct LO_eckd_data *) (idaws + cidaw); | |
1123 | recid = first_rec; | |
1124 | if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { | |
1125 | /* Only standard blocks so there is just one locate record. */ | |
1126 | ccw[-1].flags |= CCW_FLAG_CC; | |
1127 | locate_record(ccw++, LO_data++, first_trk, first_offs + 1, | |
1128 | last_rec - recid + 1, cmd, device, blksize); | |
1129 | } | |
1130 | rq_for_each_bio(bio, req) bio_for_each_segment(bv, bio, i) { | |
1131 | dst = page_address(bv->bv_page) + bv->bv_offset; | |
1132 | if (dasd_page_cache) { | |
1133 | char *copy = kmem_cache_alloc(dasd_page_cache, | |
1134 | SLAB_DMA | __GFP_NOWARN); | |
1135 | if (copy && rq_data_dir(req) == WRITE) | |
1136 | memcpy(copy + bv->bv_offset, dst, bv->bv_len); | |
1137 | if (copy) | |
1138 | dst = copy + bv->bv_offset; | |
1139 | } | |
1140 | for (off = 0; off < bv->bv_len; off += blksize) { | |
1141 | sector_t trkid = recid; | |
1142 | unsigned int recoffs = sector_div(trkid, blk_per_trk); | |
1143 | rcmd = cmd; | |
1144 | count = blksize; | |
1145 | /* Locate record for cdl special block ? */ | |
1146 | if (private->uses_cdl && recid < 2*blk_per_trk) { | |
1147 | if (dasd_eckd_cdl_special(blk_per_trk, recid)){ | |
1148 | rcmd |= 0x8; | |
1149 | count = dasd_eckd_cdl_reclen(recid); | |
ec5883ab HH |
1150 | if (count < blksize && |
1151 | rq_data_dir(req) == READ) | |
1da177e4 LT |
1152 | memset(dst + count, 0xe5, |
1153 | blksize - count); | |
1154 | } | |
1155 | ccw[-1].flags |= CCW_FLAG_CC; | |
1156 | locate_record(ccw++, LO_data++, | |
1157 | trkid, recoffs + 1, | |
1158 | 1, rcmd, device, count); | |
1159 | } | |
1160 | /* Locate record for standard blocks ? */ | |
1161 | if (private->uses_cdl && recid == 2*blk_per_trk) { | |
1162 | ccw[-1].flags |= CCW_FLAG_CC; | |
1163 | locate_record(ccw++, LO_data++, | |
1164 | trkid, recoffs + 1, | |
1165 | last_rec - recid + 1, | |
1166 | cmd, device, count); | |
1167 | } | |
1168 | /* Read/write ccw. */ | |
1169 | ccw[-1].flags |= CCW_FLAG_CC; | |
1170 | ccw->cmd_code = rcmd; | |
1171 | ccw->count = count; | |
1172 | if (idal_is_needed(dst, blksize)) { | |
1173 | ccw->cda = (__u32)(addr_t) idaws; | |
1174 | ccw->flags = CCW_FLAG_IDA; | |
1175 | idaws = idal_create_words(idaws, dst, blksize); | |
1176 | } else { | |
1177 | ccw->cda = (__u32)(addr_t) dst; | |
1178 | ccw->flags = 0; | |
1179 | } | |
1180 | ccw++; | |
1181 | dst += blksize; | |
1182 | recid++; | |
1183 | } | |
1184 | } | |
1c01b8a5 HH |
1185 | if (req->flags & REQ_FAILFAST) |
1186 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); | |
1da177e4 LT |
1187 | cqr->device = device; |
1188 | cqr->expires = 5 * 60 * HZ; /* 5 minutes */ | |
1189 | cqr->lpm = private->path_data.ppm; | |
1190 | cqr->retries = 256; | |
1191 | cqr->buildclk = get_clock(); | |
1192 | cqr->status = DASD_CQR_FILLED; | |
1193 | return cqr; | |
1194 | } | |
1195 | ||
1196 | static int | |
1197 | dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) | |
1198 | { | |
1199 | struct dasd_eckd_private *private; | |
1200 | struct ccw1 *ccw; | |
1201 | struct bio *bio; | |
1202 | struct bio_vec *bv; | |
1203 | char *dst, *cda; | |
1204 | unsigned int blksize, blk_per_trk, off; | |
1205 | sector_t recid; | |
1206 | int i, status; | |
1207 | ||
1208 | if (!dasd_page_cache) | |
1209 | goto out; | |
1210 | private = (struct dasd_eckd_private *) cqr->device->private; | |
1211 | blksize = cqr->device->bp_block; | |
1212 | blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); | |
1213 | recid = req->sector >> cqr->device->s2b_shift; | |
1214 | ccw = cqr->cpaddr; | |
1215 | /* Skip over define extent & locate record. */ | |
1216 | ccw++; | |
1217 | if (private->uses_cdl == 0 || recid > 2*blk_per_trk) | |
1218 | ccw++; | |
1219 | rq_for_each_bio(bio, req) bio_for_each_segment(bv, bio, i) { | |
1220 | dst = page_address(bv->bv_page) + bv->bv_offset; | |
1221 | for (off = 0; off < bv->bv_len; off += blksize) { | |
1222 | /* Skip locate record. */ | |
1223 | if (private->uses_cdl && recid <= 2*blk_per_trk) | |
1224 | ccw++; | |
1225 | if (dst) { | |
1226 | if (ccw->flags & CCW_FLAG_IDA) | |
1227 | cda = *((char **)((addr_t) ccw->cda)); | |
1228 | else | |
1229 | cda = (char *)((addr_t) ccw->cda); | |
1230 | if (dst != cda) { | |
1231 | if (rq_data_dir(req) == READ) | |
1232 | memcpy(dst, cda, bv->bv_len); | |
1233 | kmem_cache_free(dasd_page_cache, | |
1234 | (void *)((addr_t)cda & PAGE_MASK)); | |
1235 | } | |
1236 | dst = NULL; | |
1237 | } | |
1238 | ccw++; | |
1239 | recid++; | |
1240 | } | |
1241 | } | |
1242 | out: | |
1243 | status = cqr->status == DASD_CQR_DONE; | |
1244 | dasd_sfree_request(cqr, cqr->device); | |
1245 | return status; | |
1246 | } | |
1247 | ||
1248 | static int | |
1249 | dasd_eckd_fill_info(struct dasd_device * device, | |
1250 | struct dasd_information2_t * info) | |
1251 | { | |
1252 | struct dasd_eckd_private *private; | |
1253 | ||
1254 | private = (struct dasd_eckd_private *) device->private; | |
1255 | info->label_block = 2; | |
1256 | info->FBA_layout = private->uses_cdl ? 0 : 1; | |
1257 | info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; | |
1258 | info->characteristics_size = sizeof(struct dasd_eckd_characteristics); | |
1259 | memcpy(info->characteristics, &private->rdc_data, | |
1260 | sizeof(struct dasd_eckd_characteristics)); | |
1261 | info->confdata_size = sizeof (struct dasd_eckd_confdata); | |
1262 | memcpy(info->configuration_data, &private->conf_data, | |
1263 | sizeof (struct dasd_eckd_confdata)); | |
1264 | return 0; | |
1265 | } | |
1266 | ||
1267 | /* | |
1268 | * SECTION: ioctl functions for eckd devices. | |
1269 | */ | |
1270 | ||
1271 | /* | |
1272 | * Release device ioctl. | |
1273 | * Buils a channel programm to releases a prior reserved | |
1274 | * (see dasd_eckd_reserve) device. | |
1275 | */ | |
1276 | static int | |
1107ccfb | 1277 | dasd_eckd_release(struct dasd_device *device) |
1da177e4 | 1278 | { |
1da177e4 LT |
1279 | struct dasd_ccw_req *cqr; |
1280 | int rc; | |
1281 | ||
1282 | if (!capable(CAP_SYS_ADMIN)) | |
1283 | return -EACCES; | |
1284 | ||
1da177e4 LT |
1285 | cqr = dasd_smalloc_request(dasd_eckd_discipline.name, |
1286 | 1, 32, device); | |
1287 | if (IS_ERR(cqr)) { | |
1288 | DEV_MESSAGE(KERN_WARNING, device, "%s", | |
1289 | "Could not allocate initialization request"); | |
1290 | return PTR_ERR(cqr); | |
1291 | } | |
1292 | cqr->cpaddr->cmd_code = DASD_ECKD_CCW_RELEASE; | |
1293 | cqr->cpaddr->flags |= CCW_FLAG_SLI; | |
1294 | cqr->cpaddr->count = 32; | |
1295 | cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; | |
1296 | cqr->device = device; | |
1297 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); | |
1c01b8a5 | 1298 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
1da177e4 LT |
1299 | cqr->retries = 0; |
1300 | cqr->expires = 2 * HZ; | |
1301 | cqr->buildclk = get_clock(); | |
1302 | cqr->status = DASD_CQR_FILLED; | |
1303 | ||
1304 | rc = dasd_sleep_on_immediatly(cqr); | |
1305 | ||
1306 | dasd_sfree_request(cqr, cqr->device); | |
1307 | return rc; | |
1308 | } | |
1309 | ||
1310 | /* | |
1311 | * Reserve device ioctl. | |
1312 | * Options are set to 'synchronous wait for interrupt' and | |
1313 | * 'timeout the request'. This leads to a terminate IO if | |
1314 | * the interrupt is outstanding for a certain time. | |
1315 | */ | |
1316 | static int | |
1107ccfb | 1317 | dasd_eckd_reserve(struct dasd_device *device) |
1da177e4 | 1318 | { |
1da177e4 LT |
1319 | struct dasd_ccw_req *cqr; |
1320 | int rc; | |
1321 | ||
1322 | if (!capable(CAP_SYS_ADMIN)) | |
1323 | return -EACCES; | |
1324 | ||
1da177e4 LT |
1325 | cqr = dasd_smalloc_request(dasd_eckd_discipline.name, |
1326 | 1, 32, device); | |
1327 | if (IS_ERR(cqr)) { | |
1328 | DEV_MESSAGE(KERN_WARNING, device, "%s", | |
1329 | "Could not allocate initialization request"); | |
1330 | return PTR_ERR(cqr); | |
1331 | } | |
1332 | cqr->cpaddr->cmd_code = DASD_ECKD_CCW_RESERVE; | |
1333 | cqr->cpaddr->flags |= CCW_FLAG_SLI; | |
1334 | cqr->cpaddr->count = 32; | |
1335 | cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; | |
1336 | cqr->device = device; | |
1337 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); | |
1c01b8a5 | 1338 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
1da177e4 LT |
1339 | cqr->retries = 0; |
1340 | cqr->expires = 2 * HZ; | |
1341 | cqr->buildclk = get_clock(); | |
1342 | cqr->status = DASD_CQR_FILLED; | |
1343 | ||
1344 | rc = dasd_sleep_on_immediatly(cqr); | |
1345 | ||
1346 | dasd_sfree_request(cqr, cqr->device); | |
1347 | return rc; | |
1348 | } | |
1349 | ||
1350 | /* | |
1351 | * Steal lock ioctl - unconditional reserve device. | |
1352 | * Buils a channel programm to break a device's reservation. | |
1353 | * (unconditional reserve) | |
1354 | */ | |
1355 | static int | |
1107ccfb | 1356 | dasd_eckd_steal_lock(struct dasd_device *device) |
1da177e4 | 1357 | { |
1da177e4 LT |
1358 | struct dasd_ccw_req *cqr; |
1359 | int rc; | |
1360 | ||
1361 | if (!capable(CAP_SYS_ADMIN)) | |
1362 | return -EACCES; | |
1363 | ||
1da177e4 LT |
1364 | cqr = dasd_smalloc_request(dasd_eckd_discipline.name, |
1365 | 1, 32, device); | |
1366 | if (IS_ERR(cqr)) { | |
1367 | DEV_MESSAGE(KERN_WARNING, device, "%s", | |
1368 | "Could not allocate initialization request"); | |
1369 | return PTR_ERR(cqr); | |
1370 | } | |
1371 | cqr->cpaddr->cmd_code = DASD_ECKD_CCW_SLCK; | |
1372 | cqr->cpaddr->flags |= CCW_FLAG_SLI; | |
1373 | cqr->cpaddr->count = 32; | |
1374 | cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; | |
1375 | cqr->device = device; | |
1376 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); | |
1c01b8a5 | 1377 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
1da177e4 LT |
1378 | cqr->retries = 0; |
1379 | cqr->expires = 2 * HZ; | |
1380 | cqr->buildclk = get_clock(); | |
1381 | cqr->status = DASD_CQR_FILLED; | |
1382 | ||
1383 | rc = dasd_sleep_on_immediatly(cqr); | |
1384 | ||
1385 | dasd_sfree_request(cqr, cqr->device); | |
1386 | return rc; | |
1387 | } | |
1388 | ||
1389 | /* | |
1390 | * Read performance statistics | |
1391 | */ | |
1392 | static int | |
1107ccfb | 1393 | dasd_eckd_performance(struct dasd_device *device, void __user *argp) |
1da177e4 | 1394 | { |
1da177e4 LT |
1395 | struct dasd_psf_prssd_data *prssdp; |
1396 | struct dasd_rssd_perf_stats_t *stats; | |
1397 | struct dasd_ccw_req *cqr; | |
1398 | struct ccw1 *ccw; | |
1399 | int rc; | |
1400 | ||
1da177e4 LT |
1401 | cqr = dasd_smalloc_request(dasd_eckd_discipline.name, |
1402 | 1 /* PSF */ + 1 /* RSSD */ , | |
1403 | (sizeof (struct dasd_psf_prssd_data) + | |
1404 | sizeof (struct dasd_rssd_perf_stats_t)), | |
1405 | device); | |
1406 | if (IS_ERR(cqr)) { | |
1407 | DEV_MESSAGE(KERN_WARNING, device, "%s", | |
1408 | "Could not allocate initialization request"); | |
1409 | return PTR_ERR(cqr); | |
1410 | } | |
1411 | cqr->device = device; | |
1412 | cqr->retries = 0; | |
1413 | cqr->expires = 10 * HZ; | |
1414 | ||
1415 | /* Prepare for Read Subsystem Data */ | |
1416 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
1417 | memset(prssdp, 0, sizeof (struct dasd_psf_prssd_data)); | |
1418 | prssdp->order = PSF_ORDER_PRSSD; | |
1419 | prssdp->suborder = 0x01; /* Perfomance Statistics */ | |
1420 | prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ | |
1421 | ||
1422 | ccw = cqr->cpaddr; | |
1423 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
1424 | ccw->count = sizeof (struct dasd_psf_prssd_data); | |
1425 | ccw->flags |= CCW_FLAG_CC; | |
1426 | ccw->cda = (__u32)(addr_t) prssdp; | |
1427 | ||
1428 | /* Read Subsystem Data - Performance Statistics */ | |
1429 | stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); | |
1430 | memset(stats, 0, sizeof (struct dasd_rssd_perf_stats_t)); | |
1431 | ||
1432 | ccw++; | |
1433 | ccw->cmd_code = DASD_ECKD_CCW_RSSD; | |
1434 | ccw->count = sizeof (struct dasd_rssd_perf_stats_t); | |
1435 | ccw->cda = (__u32)(addr_t) stats; | |
1436 | ||
1437 | cqr->buildclk = get_clock(); | |
1438 | cqr->status = DASD_CQR_FILLED; | |
1439 | rc = dasd_sleep_on(cqr); | |
1440 | if (rc == 0) { | |
1441 | /* Prepare for Read Subsystem Data */ | |
1442 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
1443 | stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); | |
1107ccfb CH |
1444 | if (copy_to_user(argp, stats, |
1445 | sizeof(struct dasd_rssd_perf_stats_t))) | |
1446 | rc = -EFAULT; | |
1da177e4 LT |
1447 | } |
1448 | dasd_sfree_request(cqr, cqr->device); | |
1449 | return rc; | |
1450 | } | |
1451 | ||
1452 | /* | |
1453 | * Get attributes (cache operations) | |
1454 | * Returnes the cache attributes used in Define Extend (DE). | |
1455 | */ | |
1456 | static int | |
1107ccfb | 1457 | dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) |
1da177e4 | 1458 | { |
1107ccfb CH |
1459 | struct dasd_eckd_private *private = |
1460 | (struct dasd_eckd_private *)device->private; | |
1461 | struct attrib_data_t attrib = private->attrib; | |
1da177e4 LT |
1462 | int rc; |
1463 | ||
1464 | if (!capable(CAP_SYS_ADMIN)) | |
1465 | return -EACCES; | |
1107ccfb | 1466 | if (!argp) |
1da177e4 LT |
1467 | return -EINVAL; |
1468 | ||
1107ccfb CH |
1469 | rc = 0; |
1470 | if (copy_to_user(argp, (long *) &attrib, | |
1471 | sizeof (struct attrib_data_t))) | |
1472 | rc = -EFAULT; | |
1da177e4 LT |
1473 | |
1474 | return rc; | |
1475 | } | |
1476 | ||
1477 | /* | |
1478 | * Set attributes (cache operations) | |
1479 | * Stores the attributes for cache operation to be used in Define Extend (DE). | |
1480 | */ | |
1481 | static int | |
1107ccfb | 1482 | dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) |
1da177e4 | 1483 | { |
1107ccfb CH |
1484 | struct dasd_eckd_private *private = |
1485 | (struct dasd_eckd_private *)device->private; | |
1da177e4 LT |
1486 | struct attrib_data_t attrib; |
1487 | ||
1488 | if (!capable(CAP_SYS_ADMIN)) | |
1489 | return -EACCES; | |
1107ccfb | 1490 | if (!argp) |
1da177e4 LT |
1491 | return -EINVAL; |
1492 | ||
1107ccfb | 1493 | if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) |
1da177e4 | 1494 | return -EFAULT; |
1da177e4 LT |
1495 | private->attrib = attrib; |
1496 | ||
1497 | DEV_MESSAGE(KERN_INFO, device, | |
1498 | "cache operation mode set to %x (%i cylinder prestage)", | |
1499 | private->attrib.operation, private->attrib.nr_cyl); | |
1500 | return 0; | |
1501 | } | |
1502 | ||
1107ccfb CH |
1503 | static int |
1504 | dasd_eckd_ioctl(struct dasd_device *device, unsigned int cmd, void __user *argp) | |
1505 | { | |
1506 | switch (cmd) { | |
1507 | case BIODASDGATTR: | |
1508 | return dasd_eckd_get_attrib(device, argp); | |
1509 | case BIODASDSATTR: | |
1510 | return dasd_eckd_set_attrib(device, argp); | |
1511 | case BIODASDPSRD: | |
1512 | return dasd_eckd_performance(device, argp); | |
1513 | case BIODASDRLSE: | |
1514 | return dasd_eckd_release(device); | |
1515 | case BIODASDRSRV: | |
1516 | return dasd_eckd_reserve(device); | |
1517 | case BIODASDSLCK: | |
1518 | return dasd_eckd_steal_lock(device); | |
1519 | default: | |
1520 | return -ENOIOCTLCMD; | |
1521 | } | |
1522 | } | |
1523 | ||
1da177e4 LT |
1524 | /* |
1525 | * Print sense data and related channel program. | |
1526 | * Parts are printed because printk buffer is only 1024 bytes. | |
1527 | */ | |
1528 | static void | |
1529 | dasd_eckd_dump_sense(struct dasd_device *device, struct dasd_ccw_req * req, | |
1530 | struct irb *irb) | |
1531 | { | |
1532 | char *page; | |
1533 | struct ccw1 *act, *end, *last; | |
1534 | int len, sl, sct, count; | |
1535 | ||
1536 | page = (char *) get_zeroed_page(GFP_ATOMIC); | |
1537 | if (page == NULL) { | |
1538 | DEV_MESSAGE(KERN_ERR, device, " %s", | |
1539 | "No memory to dump sense data"); | |
1540 | return; | |
1541 | } | |
1542 | len = sprintf(page, KERN_ERR PRINTK_HEADER | |
1543 | " I/O status report for device %s:\n", | |
1544 | device->cdev->dev.bus_id); | |
1545 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER | |
1546 | " in req: %p CS: 0x%02X DS: 0x%02X\n", req, | |
1547 | irb->scsw.cstat, irb->scsw.dstat); | |
1548 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER | |
1549 | " device %s: Failing CCW: %p\n", | |
1550 | device->cdev->dev.bus_id, | |
1551 | (void *) (addr_t) irb->scsw.cpa); | |
1552 | if (irb->esw.esw0.erw.cons) { | |
1553 | for (sl = 0; sl < 4; sl++) { | |
1554 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER | |
1555 | " Sense(hex) %2d-%2d:", | |
1556 | (8 * sl), ((8 * sl) + 7)); | |
1557 | ||
1558 | for (sct = 0; sct < 8; sct++) { | |
1559 | len += sprintf(page + len, " %02x", | |
1560 | irb->ecw[8 * sl + sct]); | |
1561 | } | |
1562 | len += sprintf(page + len, "\n"); | |
1563 | } | |
1564 | ||
1565 | if (irb->ecw[27] & DASD_SENSE_BIT_0) { | |
1566 | /* 24 Byte Sense Data */ | |
1567 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER | |
1568 | " 24 Byte: %x MSG %x, " | |
1569 | "%s MSGb to SYSOP\n", | |
1570 | irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, | |
1571 | irb->ecw[1] & 0x10 ? "" : "no"); | |
1572 | } else { | |
1573 | /* 32 Byte Sense Data */ | |
1574 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER | |
1575 | " 32 Byte: Format: %x " | |
1576 | "Exception class %x\n", | |
1577 | irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); | |
1578 | } | |
1579 | } else { | |
1580 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER | |
1581 | " SORRY - NO VALID SENSE AVAILABLE\n"); | |
1582 | } | |
1583 | MESSAGE_LOG(KERN_ERR, "%s", | |
1584 | page + sizeof(KERN_ERR PRINTK_HEADER)); | |
1585 | ||
1586 | /* dump the Channel Program */ | |
1587 | /* print first CCWs (maximum 8) */ | |
1588 | act = req->cpaddr; | |
1589 | for (last = act; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); | |
1590 | end = min(act + 8, last); | |
1591 | len = sprintf(page, KERN_ERR PRINTK_HEADER | |
1592 | " Related CP in req: %p\n", req); | |
1593 | while (act <= end) { | |
1594 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER | |
1595 | " CCW %p: %08X %08X DAT:", | |
1596 | act, ((int *) act)[0], ((int *) act)[1]); | |
1597 | for (count = 0; count < 32 && count < act->count; | |
1598 | count += sizeof(int)) | |
1599 | len += sprintf(page + len, " %08X", | |
1600 | ((int *) (addr_t) act->cda) | |
1601 | [(count>>2)]); | |
1602 | len += sprintf(page + len, "\n"); | |
1603 | act++; | |
1604 | } | |
1605 | MESSAGE_LOG(KERN_ERR, "%s", | |
1606 | page + sizeof(KERN_ERR PRINTK_HEADER)); | |
1607 | ||
1608 | /* print failing CCW area */ | |
1609 | len = 0; | |
1610 | if (act < ((struct ccw1 *)(addr_t) irb->scsw.cpa) - 2) { | |
1611 | act = ((struct ccw1 *)(addr_t) irb->scsw.cpa) - 2; | |
1612 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n"); | |
1613 | } | |
1614 | end = min((struct ccw1 *)(addr_t) irb->scsw.cpa + 2, last); | |
1615 | while (act <= end) { | |
1616 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER | |
1617 | " CCW %p: %08X %08X DAT:", | |
1618 | act, ((int *) act)[0], ((int *) act)[1]); | |
1619 | for (count = 0; count < 32 && count < act->count; | |
1620 | count += sizeof(int)) | |
1621 | len += sprintf(page + len, " %08X", | |
1622 | ((int *) (addr_t) act->cda) | |
1623 | [(count>>2)]); | |
1624 | len += sprintf(page + len, "\n"); | |
1625 | act++; | |
1626 | } | |
1627 | ||
1628 | /* print last CCWs */ | |
1629 | if (act < last - 2) { | |
1630 | act = last - 2; | |
1631 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n"); | |
1632 | } | |
1633 | while (act <= last) { | |
1634 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER | |
1635 | " CCW %p: %08X %08X DAT:", | |
1636 | act, ((int *) act)[0], ((int *) act)[1]); | |
1637 | for (count = 0; count < 32 && count < act->count; | |
1638 | count += sizeof(int)) | |
1639 | len += sprintf(page + len, " %08X", | |
1640 | ((int *) (addr_t) act->cda) | |
1641 | [(count>>2)]); | |
1642 | len += sprintf(page + len, "\n"); | |
1643 | act++; | |
1644 | } | |
1645 | if (len > 0) | |
1646 | MESSAGE_LOG(KERN_ERR, "%s", | |
1647 | page + sizeof(KERN_ERR PRINTK_HEADER)); | |
1648 | free_page((unsigned long) page); | |
1649 | } | |
1650 | ||
1651 | /* | |
1652 | * max_blocks is dependent on the amount of storage that is available | |
1653 | * in the static io buffer for each device. Currently each device has | |
1654 | * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has | |
1655 | * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use | |
1656 | * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In | |
1657 | * addition we have one define extent ccw + 16 bytes of data and one | |
1658 | * locate record ccw + 16 bytes of data. That makes: | |
1659 | * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. | |
1660 | * We want to fit two into the available memory so that we can immediately | |
1661 | * start the next request if one finishes off. That makes 249.5 blocks | |
1662 | * for one request. Give a little safety and the result is 240. | |
1663 | */ | |
1664 | static struct dasd_discipline dasd_eckd_discipline = { | |
1665 | .owner = THIS_MODULE, | |
1666 | .name = "ECKD", | |
1667 | .ebcname = "ECKD", | |
1668 | .max_blocks = 240, | |
1669 | .check_device = dasd_eckd_check_characteristics, | |
1670 | .do_analysis = dasd_eckd_do_analysis, | |
1671 | .fill_geometry = dasd_eckd_fill_geometry, | |
1672 | .start_IO = dasd_start_IO, | |
1673 | .term_IO = dasd_term_IO, | |
1674 | .format_device = dasd_eckd_format_device, | |
1675 | .examine_error = dasd_eckd_examine_error, | |
1676 | .erp_action = dasd_eckd_erp_action, | |
1677 | .erp_postaction = dasd_eckd_erp_postaction, | |
1678 | .build_cp = dasd_eckd_build_cp, | |
1679 | .free_cp = dasd_eckd_free_cp, | |
1680 | .dump_sense = dasd_eckd_dump_sense, | |
1681 | .fill_info = dasd_eckd_fill_info, | |
1107ccfb | 1682 | .ioctl = dasd_eckd_ioctl, |
1da177e4 LT |
1683 | }; |
1684 | ||
1685 | static int __init | |
1686 | dasd_eckd_init(void) | |
1687 | { | |
1688 | int ret; | |
1689 | ||
1da177e4 LT |
1690 | ASCEBC(dasd_eckd_discipline.ebcname, 4); |
1691 | ||
1692 | ret = ccw_driver_register(&dasd_eckd_driver); | |
1107ccfb CH |
1693 | if (!ret) |
1694 | dasd_generic_auto_online(&dasd_eckd_driver); | |
1695 | return ret; | |
1da177e4 LT |
1696 | } |
1697 | ||
1698 | static void __exit | |
1699 | dasd_eckd_cleanup(void) | |
1700 | { | |
1701 | ccw_driver_unregister(&dasd_eckd_driver); | |
1da177e4 LT |
1702 | } |
1703 | ||
1704 | module_init(dasd_eckd_init); | |
1705 | module_exit(dasd_eckd_cleanup); | |
1706 | ||
1707 | /* | |
1708 | * Overrides for Emacs so that we follow Linus's tabbing style. | |
1709 | * Emacs will notice this stuff at the end of the file and automatically | |
1710 | * adjust the settings for this buffer only. This must remain at the end | |
1711 | * of the file. | |
1712 | * --------------------------------------------------------------------------- | |
1713 | * Local variables: | |
1714 | * c-indent-level: 4 | |
1715 | * c-brace-imaginary-offset: 0 | |
1716 | * c-brace-offset: -4 | |
1717 | * c-argdecl-indent: 4 | |
1718 | * c-label-offset: -4 | |
1719 | * c-continued-statement-offset: 4 | |
1720 | * c-continued-brace-offset: 0 | |
1721 | * indent-tabs-mode: 1 | |
1722 | * tab-width: 8 | |
1723 | * End: | |
1724 | */ |