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Commit | Line | Data |
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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 | ||
137 | static inline int | |
138 | bytes_per_record(struct dasd_eckd_characteristics *rdc, int kl, int dl) | |
139 | { | |
140 | unsigned int fl1, fl2, int1, int2; | |
141 | int bpr; | |
142 | ||
143 | switch (rdc->formula) { | |
144 | case 0x01: | |
145 | fl1 = round_up_multiple(ECKD_F2(rdc) + dl, ECKD_F1(rdc)); | |
146 | fl2 = round_up_multiple(kl ? ECKD_F2(rdc) + kl : 0, | |
147 | ECKD_F1(rdc)); | |
148 | bpr = fl1 + fl2; | |
149 | break; | |
150 | case 0x02: | |
151 | int1 = ceil_quot(dl + ECKD_F6(rdc), ECKD_F5(rdc) << 1); | |
152 | int2 = ceil_quot(kl + ECKD_F6(rdc), ECKD_F5(rdc) << 1); | |
153 | fl1 = round_up_multiple(ECKD_F1(rdc) * ECKD_F2(rdc) + dl + | |
154 | ECKD_F6(rdc) + ECKD_F4(rdc) * int1, | |
155 | ECKD_F1(rdc)); | |
156 | fl2 = round_up_multiple(ECKD_F1(rdc) * ECKD_F3(rdc) + kl + | |
157 | ECKD_F6(rdc) + ECKD_F4(rdc) * int2, | |
158 | ECKD_F1(rdc)); | |
159 | bpr = fl1 + fl2; | |
160 | break; | |
161 | default: | |
162 | bpr = 0; | |
163 | break; | |
164 | } | |
165 | return bpr; | |
166 | } | |
167 | ||
168 | static inline unsigned int | |
169 | bytes_per_track(struct dasd_eckd_characteristics *rdc) | |
170 | { | |
171 | return *(unsigned int *) (rdc->byte_per_track) >> 8; | |
172 | } | |
173 | ||
174 | static inline unsigned int | |
175 | recs_per_track(struct dasd_eckd_characteristics * rdc, | |
176 | unsigned int kl, unsigned int dl) | |
177 | { | |
178 | int dn, kn; | |
179 | ||
180 | switch (rdc->dev_type) { | |
181 | case 0x3380: | |
182 | if (kl) | |
183 | return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + | |
184 | ceil_quot(dl + 12, 32)); | |
185 | else | |
186 | return 1499 / (15 + ceil_quot(dl + 12, 32)); | |
187 | case 0x3390: | |
188 | dn = ceil_quot(dl + 6, 232) + 1; | |
189 | if (kl) { | |
190 | kn = ceil_quot(kl + 6, 232) + 1; | |
191 | return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + | |
192 | 9 + ceil_quot(dl + 6 * dn, 34)); | |
193 | } else | |
194 | return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); | |
195 | case 0x9345: | |
196 | dn = ceil_quot(dl + 6, 232) + 1; | |
197 | if (kl) { | |
198 | kn = ceil_quot(kl + 6, 232) + 1; | |
199 | return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + | |
200 | ceil_quot(dl + 6 * dn, 34)); | |
201 | } else | |
202 | return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); | |
203 | } | |
204 | return 0; | |
205 | } | |
206 | ||
207 | static inline void | |
208 | check_XRC (struct ccw1 *de_ccw, | |
209 | struct DE_eckd_data *data, | |
210 | struct dasd_device *device) | |
211 | { | |
212 | struct dasd_eckd_private *private; | |
213 | ||
214 | private = (struct dasd_eckd_private *) device->private; | |
215 | ||
216 | /* switch on System Time Stamp - needed for XRC Support */ | |
217 | if (private->rdc_data.facilities.XRC_supported) { | |
138c014d | 218 | |
1da177e4 LT |
219 | data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ |
220 | data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ | |
138c014d | 221 | |
1da177e4 | 222 | data->ep_sys_time = get_clock (); |
138c014d | 223 | |
1da177e4 | 224 | de_ccw->count = sizeof (struct DE_eckd_data); |
138c014d | 225 | de_ccw->flags |= CCW_FLAG_SLI; |
1da177e4 LT |
226 | } |
227 | ||
228 | return; | |
229 | ||
230 | } /* end check_XRC */ | |
231 | ||
232 | static inline void | |
233 | define_extent(struct ccw1 * ccw, struct DE_eckd_data * data, int trk, | |
234 | int totrk, int cmd, struct dasd_device * device) | |
235 | { | |
236 | struct dasd_eckd_private *private; | |
237 | struct ch_t geo, beg, end; | |
238 | ||
239 | private = (struct dasd_eckd_private *) device->private; | |
240 | ||
241 | ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; | |
242 | ccw->flags = 0; | |
243 | ccw->count = 16; | |
244 | ccw->cda = (__u32) __pa(data); | |
245 | ||
246 | memset(data, 0, sizeof (struct DE_eckd_data)); | |
247 | switch (cmd) { | |
248 | case DASD_ECKD_CCW_READ_HOME_ADDRESS: | |
249 | case DASD_ECKD_CCW_READ_RECORD_ZERO: | |
250 | case DASD_ECKD_CCW_READ: | |
251 | case DASD_ECKD_CCW_READ_MT: | |
252 | case DASD_ECKD_CCW_READ_CKD: | |
253 | case DASD_ECKD_CCW_READ_CKD_MT: | |
254 | case DASD_ECKD_CCW_READ_KD: | |
255 | case DASD_ECKD_CCW_READ_KD_MT: | |
256 | case DASD_ECKD_CCW_READ_COUNT: | |
257 | data->mask.perm = 0x1; | |
258 | data->attributes.operation = private->attrib.operation; | |
259 | break; | |
260 | case DASD_ECKD_CCW_WRITE: | |
261 | case DASD_ECKD_CCW_WRITE_MT: | |
262 | case DASD_ECKD_CCW_WRITE_KD: | |
263 | case DASD_ECKD_CCW_WRITE_KD_MT: | |
264 | data->mask.perm = 0x02; | |
265 | data->attributes.operation = private->attrib.operation; | |
266 | check_XRC (ccw, data, device); | |
267 | break; | |
268 | case DASD_ECKD_CCW_WRITE_CKD: | |
269 | case DASD_ECKD_CCW_WRITE_CKD_MT: | |
270 | data->attributes.operation = DASD_BYPASS_CACHE; | |
271 | check_XRC (ccw, data, device); | |
272 | break; | |
273 | case DASD_ECKD_CCW_ERASE: | |
274 | case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: | |
275 | case DASD_ECKD_CCW_WRITE_RECORD_ZERO: | |
276 | data->mask.perm = 0x3; | |
277 | data->mask.auth = 0x1; | |
278 | data->attributes.operation = DASD_BYPASS_CACHE; | |
279 | check_XRC (ccw, data, device); | |
280 | break; | |
281 | default: | |
282 | DEV_MESSAGE(KERN_ERR, device, "unknown opcode 0x%x", cmd); | |
283 | break; | |
284 | } | |
285 | ||
286 | data->attributes.mode = 0x3; /* ECKD */ | |
287 | ||
288 | if ((private->rdc_data.cu_type == 0x2105 || | |
289 | private->rdc_data.cu_type == 0x2107 || | |
290 | private->rdc_data.cu_type == 0x1750) | |
291 | && !(private->uses_cdl && trk < 2)) | |
292 | data->ga_extended |= 0x40; /* Regular Data Format Mode */ | |
293 | ||
294 | geo.cyl = private->rdc_data.no_cyl; | |
295 | geo.head = private->rdc_data.trk_per_cyl; | |
296 | beg.cyl = trk / geo.head; | |
297 | beg.head = trk % geo.head; | |
298 | end.cyl = totrk / geo.head; | |
299 | end.head = totrk % geo.head; | |
300 | ||
301 | /* check for sequential prestage - enhance cylinder range */ | |
302 | if (data->attributes.operation == DASD_SEQ_PRESTAGE || | |
303 | data->attributes.operation == DASD_SEQ_ACCESS) { | |
138c014d HH |
304 | |
305 | if (end.cyl + private->attrib.nr_cyl < geo.cyl) | |
1da177e4 LT |
306 | end.cyl += private->attrib.nr_cyl; |
307 | else | |
308 | end.cyl = (geo.cyl - 1); | |
309 | } | |
310 | ||
311 | data->beg_ext.cyl = beg.cyl; | |
312 | data->beg_ext.head = beg.head; | |
313 | data->end_ext.cyl = end.cyl; | |
314 | data->end_ext.head = end.head; | |
315 | } | |
316 | ||
317 | static inline void | |
318 | locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, int trk, | |
319 | int rec_on_trk, int no_rec, int cmd, | |
320 | struct dasd_device * device, int reclen) | |
321 | { | |
322 | struct dasd_eckd_private *private; | |
323 | int sector; | |
324 | int dn, d; | |
138c014d | 325 | |
1da177e4 LT |
326 | private = (struct dasd_eckd_private *) device->private; |
327 | ||
328 | DBF_DEV_EVENT(DBF_INFO, device, | |
329 | "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", | |
330 | trk, rec_on_trk, no_rec, cmd, reclen); | |
331 | ||
332 | ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; | |
333 | ccw->flags = 0; | |
334 | ccw->count = 16; | |
335 | ccw->cda = (__u32) __pa(data); | |
336 | ||
337 | memset(data, 0, sizeof (struct LO_eckd_data)); | |
338 | sector = 0; | |
339 | if (rec_on_trk) { | |
340 | switch (private->rdc_data.dev_type) { | |
341 | case 0x3390: | |
342 | dn = ceil_quot(reclen + 6, 232); | |
343 | d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); | |
344 | sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; | |
345 | break; | |
346 | case 0x3380: | |
347 | d = 7 + ceil_quot(reclen + 12, 32); | |
348 | sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; | |
349 | break; | |
350 | } | |
351 | } | |
352 | data->sector = sector; | |
353 | data->count = no_rec; | |
354 | switch (cmd) { | |
355 | case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: | |
356 | data->operation.orientation = 0x3; | |
357 | data->operation.operation = 0x03; | |
358 | break; | |
359 | case DASD_ECKD_CCW_READ_HOME_ADDRESS: | |
360 | data->operation.orientation = 0x3; | |
361 | data->operation.operation = 0x16; | |
362 | break; | |
363 | case DASD_ECKD_CCW_WRITE_RECORD_ZERO: | |
364 | data->operation.orientation = 0x1; | |
365 | data->operation.operation = 0x03; | |
366 | data->count++; | |
367 | break; | |
368 | case DASD_ECKD_CCW_READ_RECORD_ZERO: | |
369 | data->operation.orientation = 0x3; | |
370 | data->operation.operation = 0x16; | |
371 | data->count++; | |
372 | break; | |
373 | case DASD_ECKD_CCW_WRITE: | |
374 | case DASD_ECKD_CCW_WRITE_MT: | |
375 | case DASD_ECKD_CCW_WRITE_KD: | |
376 | case DASD_ECKD_CCW_WRITE_KD_MT: | |
377 | data->auxiliary.last_bytes_used = 0x1; | |
378 | data->length = reclen; | |
379 | data->operation.operation = 0x01; | |
380 | break; | |
381 | case DASD_ECKD_CCW_WRITE_CKD: | |
382 | case DASD_ECKD_CCW_WRITE_CKD_MT: | |
383 | data->auxiliary.last_bytes_used = 0x1; | |
384 | data->length = reclen; | |
385 | data->operation.operation = 0x03; | |
386 | break; | |
387 | case DASD_ECKD_CCW_READ: | |
388 | case DASD_ECKD_CCW_READ_MT: | |
389 | case DASD_ECKD_CCW_READ_KD: | |
390 | case DASD_ECKD_CCW_READ_KD_MT: | |
391 | data->auxiliary.last_bytes_used = 0x1; | |
392 | data->length = reclen; | |
393 | data->operation.operation = 0x06; | |
394 | break; | |
395 | case DASD_ECKD_CCW_READ_CKD: | |
396 | case DASD_ECKD_CCW_READ_CKD_MT: | |
397 | data->auxiliary.last_bytes_used = 0x1; | |
398 | data->length = reclen; | |
399 | data->operation.operation = 0x16; | |
400 | break; | |
401 | case DASD_ECKD_CCW_READ_COUNT: | |
402 | data->operation.operation = 0x06; | |
403 | break; | |
404 | case DASD_ECKD_CCW_ERASE: | |
405 | data->length = reclen; | |
406 | data->auxiliary.last_bytes_used = 0x1; | |
407 | data->operation.operation = 0x0b; | |
408 | break; | |
409 | default: | |
410 | DEV_MESSAGE(KERN_ERR, device, "unknown opcode 0x%x", cmd); | |
411 | } | |
412 | data->seek_addr.cyl = data->search_arg.cyl = | |
413 | trk / private->rdc_data.trk_per_cyl; | |
414 | data->seek_addr.head = data->search_arg.head = | |
415 | trk % private->rdc_data.trk_per_cyl; | |
416 | data->search_arg.record = rec_on_trk; | |
417 | } | |
418 | ||
419 | /* | |
420 | * Returns 1 if the block is one of the special blocks that needs | |
421 | * to get read/written with the KD variant of the command. | |
422 | * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and | |
423 | * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. | |
424 | * Luckily the KD variants differ only by one bit (0x08) from the | |
425 | * normal variant. So don't wonder about code like: | |
426 | * if (dasd_eckd_cdl_special(blk_per_trk, recid)) | |
427 | * ccw->cmd_code |= 0x8; | |
428 | */ | |
429 | static inline int | |
430 | dasd_eckd_cdl_special(int blk_per_trk, int recid) | |
431 | { | |
432 | if (recid < 3) | |
433 | return 1; | |
434 | if (recid < blk_per_trk) | |
435 | return 0; | |
436 | if (recid < 2 * blk_per_trk) | |
437 | return 1; | |
438 | return 0; | |
439 | } | |
440 | ||
441 | /* | |
442 | * Returns the record size for the special blocks of the cdl format. | |
443 | * Only returns something useful if dasd_eckd_cdl_special is true | |
444 | * for the recid. | |
445 | */ | |
446 | static inline int | |
447 | dasd_eckd_cdl_reclen(int recid) | |
448 | { | |
449 | if (recid < 3) | |
450 | return sizes_trk0[recid]; | |
451 | return LABEL_SIZE; | |
452 | } | |
453 | ||
3d052595 HH |
454 | /* |
455 | * Generate device unique id that specifies the physical device. | |
456 | */ | |
457 | static int | |
458 | dasd_eckd_generate_uid(struct dasd_device *device, struct dasd_uid *uid) | |
459 | { | |
460 | struct dasd_eckd_private *private; | |
461 | struct dasd_eckd_confdata *confdata; | |
462 | ||
463 | private = (struct dasd_eckd_private *) device->private; | |
464 | if (!private) | |
465 | return -ENODEV; | |
466 | confdata = &private->conf_data; | |
467 | if (!confdata) | |
468 | return -ENODEV; | |
469 | ||
470 | memset(uid, 0, sizeof(struct dasd_uid)); | |
d0710c7c HH |
471 | memcpy(uid->vendor, confdata->ned1.HDA_manufacturer, |
472 | sizeof(uid->vendor) - 1); | |
3d052595 | 473 | EBCASC(uid->vendor, sizeof(uid->vendor) - 1); |
d0710c7c HH |
474 | memcpy(uid->serial, confdata->ned1.HDA_location, |
475 | sizeof(uid->serial) - 1); | |
3d052595 HH |
476 | EBCASC(uid->serial, sizeof(uid->serial) - 1); |
477 | uid->ssid = confdata->neq.subsystemID; | |
478 | if (confdata->ned2.sneq.flags == 0x40) { | |
479 | uid->alias = 1; | |
480 | uid->unit_addr = confdata->ned2.sneq.base_unit_addr; | |
481 | } else | |
482 | uid->unit_addr = confdata->ned1.unit_addr; | |
483 | ||
484 | return 0; | |
485 | } | |
486 | ||
1da177e4 LT |
487 | static int |
488 | dasd_eckd_read_conf(struct dasd_device *device) | |
489 | { | |
490 | void *conf_data; | |
491 | int conf_len, conf_data_saved; | |
492 | int rc; | |
493 | __u8 lpm; | |
494 | struct dasd_eckd_private *private; | |
495 | struct dasd_eckd_path *path_data; | |
496 | ||
497 | private = (struct dasd_eckd_private *) device->private; | |
498 | path_data = (struct dasd_eckd_path *) &private->path_data; | |
499 | path_data->opm = ccw_device_get_path_mask(device->cdev); | |
500 | lpm = 0x80; | |
501 | conf_data_saved = 0; | |
502 | ||
503 | /* get configuration data per operational path */ | |
504 | for (lpm = 0x80; lpm; lpm>>= 1) { | |
505 | if (lpm & path_data->opm){ | |
506 | rc = read_conf_data_lpm(device->cdev, &conf_data, | |
507 | &conf_len, lpm); | |
508 | if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ | |
509 | MESSAGE(KERN_WARNING, | |
510 | "Read configuration data returned " | |
511 | "error %d", rc); | |
512 | return rc; | |
513 | } | |
514 | if (conf_data == NULL) { | |
515 | MESSAGE(KERN_WARNING, "%s", "No configuration " | |
516 | "data retrieved"); | |
517 | continue; /* no errror */ | |
518 | } | |
519 | if (conf_len != sizeof (struct dasd_eckd_confdata)) { | |
520 | MESSAGE(KERN_WARNING, | |
521 | "sizes of configuration data mismatch" | |
522 | "%d (read) vs %ld (expected)", | |
523 | conf_len, | |
524 | sizeof (struct dasd_eckd_confdata)); | |
525 | kfree(conf_data); | |
526 | continue; /* no errror */ | |
527 | } | |
528 | /* save first valid configuration data */ | |
529 | if (!conf_data_saved){ | |
530 | memcpy(&private->conf_data, conf_data, | |
531 | sizeof (struct dasd_eckd_confdata)); | |
532 | conf_data_saved++; | |
533 | } | |
534 | switch (((char *)conf_data)[242] & 0x07){ | |
535 | case 0x02: | |
536 | path_data->npm |= lpm; | |
537 | break; | |
538 | case 0x03: | |
539 | path_data->ppm |= lpm; | |
540 | break; | |
541 | } | |
542 | kfree(conf_data); | |
543 | } | |
544 | } | |
545 | return 0; | |
546 | } | |
547 | ||
40545573 HH |
548 | /* |
549 | * Build CP for Perform Subsystem Function - SSC. | |
550 | */ | |
551 | struct dasd_ccw_req * | |
552 | dasd_eckd_build_psf_ssc(struct dasd_device *device) | |
553 | { | |
554 | struct dasd_ccw_req *cqr; | |
555 | struct dasd_psf_ssc_data *psf_ssc_data; | |
556 | struct ccw1 *ccw; | |
557 | ||
558 | cqr = dasd_smalloc_request("ECKD", 1 /* PSF */ , | |
559 | sizeof(struct dasd_psf_ssc_data), | |
560 | device); | |
561 | ||
562 | if (IS_ERR(cqr)) { | |
563 | DEV_MESSAGE(KERN_WARNING, device, "%s", | |
564 | "Could not allocate PSF-SSC request"); | |
565 | return cqr; | |
566 | } | |
567 | psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; | |
568 | psf_ssc_data->order = PSF_ORDER_SSC; | |
569 | psf_ssc_data->suborder = 0x08; | |
570 | ||
571 | ccw = cqr->cpaddr; | |
572 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
573 | ccw->cda = (__u32)(addr_t)psf_ssc_data; | |
574 | ccw->count = 66; | |
575 | ||
576 | cqr->device = device; | |
577 | cqr->expires = 10*HZ; | |
578 | cqr->buildclk = get_clock(); | |
579 | cqr->status = DASD_CQR_FILLED; | |
580 | return cqr; | |
581 | } | |
582 | ||
583 | /* | |
584 | * Perform Subsystem Function. | |
585 | * It is necessary to trigger CIO for channel revalidation since this | |
586 | * call might change behaviour of DASD devices. | |
587 | */ | |
588 | static int | |
589 | dasd_eckd_psf_ssc(struct dasd_device *device) | |
590 | { | |
591 | struct dasd_ccw_req *cqr; | |
592 | int rc; | |
593 | ||
594 | cqr = dasd_eckd_build_psf_ssc(device); | |
595 | if (IS_ERR(cqr)) | |
596 | return PTR_ERR(cqr); | |
597 | ||
598 | rc = dasd_sleep_on(cqr); | |
599 | if (!rc) | |
600 | /* trigger CIO to reprobe devices */ | |
601 | css_schedule_reprobe(); | |
602 | dasd_sfree_request(cqr, cqr->device); | |
603 | return rc; | |
604 | } | |
605 | ||
606 | /* | |
607 | * Valide storage server of current device. | |
608 | */ | |
609 | static int | |
8e79a441 | 610 | dasd_eckd_validate_server(struct dasd_device *device, struct dasd_uid *uid) |
40545573 HH |
611 | { |
612 | int rc; | |
613 | ||
614 | /* Currently PAV is the only reason to 'validate' server on LPAR */ | |
615 | if (dasd_nopav || MACHINE_IS_VM) | |
616 | return 0; | |
617 | ||
618 | rc = dasd_eckd_psf_ssc(device); | |
8e79a441 HH |
619 | /* may be requested feature is not available on server, |
620 | * therefore just report error and go ahead */ | |
621 | DEV_MESSAGE(KERN_INFO, device, | |
622 | "PSF-SSC on storage subsystem %s.%s.%04x returned rc=%d", | |
623 | uid->vendor, uid->serial, uid->ssid, rc); | |
40545573 HH |
624 | /* RE-Read Configuration Data */ |
625 | return dasd_eckd_read_conf(device); | |
626 | } | |
627 | ||
3d052595 HH |
628 | /* |
629 | * Check device characteristics. | |
630 | * If the device is accessible using ECKD discipline, the device is enabled. | |
631 | */ | |
1da177e4 LT |
632 | static int |
633 | dasd_eckd_check_characteristics(struct dasd_device *device) | |
634 | { | |
635 | struct dasd_eckd_private *private; | |
3d052595 | 636 | struct dasd_uid uid; |
1da177e4 LT |
637 | void *rdc_data; |
638 | int rc; | |
639 | ||
640 | private = (struct dasd_eckd_private *) device->private; | |
641 | if (private == NULL) { | |
138c014d | 642 | private = kzalloc(sizeof(struct dasd_eckd_private), |
1da177e4 LT |
643 | GFP_KERNEL | GFP_DMA); |
644 | if (private == NULL) { | |
645 | DEV_MESSAGE(KERN_WARNING, device, "%s", | |
646 | "memory allocation failed for private " | |
647 | "data"); | |
648 | return -ENOMEM; | |
649 | } | |
1da177e4 LT |
650 | device->private = (void *) private; |
651 | } | |
652 | /* Invalidate status of initial analysis. */ | |
653 | private->init_cqr_status = -1; | |
654 | /* Set default cache operations. */ | |
655 | private->attrib.operation = DASD_NORMAL_CACHE; | |
656 | private->attrib.nr_cyl = 0; | |
657 | ||
40545573 HH |
658 | /* Read Configuration Data */ |
659 | rc = dasd_eckd_read_conf(device); | |
660 | if (rc) | |
661 | return rc; | |
662 | ||
663 | /* Generate device unique id and register in devmap */ | |
664 | rc = dasd_eckd_generate_uid(device, &uid); | |
665 | if (rc) | |
666 | return rc; | |
667 | rc = dasd_set_uid(device->cdev, &uid); | |
668 | if (rc == 1) /* new server found */ | |
8e79a441 | 669 | rc = dasd_eckd_validate_server(device, &uid); |
40545573 HH |
670 | if (rc) |
671 | return rc; | |
672 | ||
1da177e4 LT |
673 | /* Read Device Characteristics */ |
674 | rdc_data = (void *) &(private->rdc_data); | |
3d052595 | 675 | memset(rdc_data, 0, sizeof(rdc_data)); |
1da177e4 | 676 | rc = read_dev_chars(device->cdev, &rdc_data, 64); |
40545573 | 677 | if (rc) |
1da177e4 | 678 | DEV_MESSAGE(KERN_WARNING, device, |
40545573 HH |
679 | "Read device characteristics returned " |
680 | "rc=%d", rc); | |
1da177e4 LT |
681 | |
682 | DEV_MESSAGE(KERN_INFO, device, | |
683 | "%04X/%02X(CU:%04X/%02X) Cyl:%d Head:%d Sec:%d", | |
684 | private->rdc_data.dev_type, | |
685 | private->rdc_data.dev_model, | |
686 | private->rdc_data.cu_type, | |
687 | private->rdc_data.cu_model.model, | |
688 | private->rdc_data.no_cyl, | |
689 | private->rdc_data.trk_per_cyl, | |
690 | private->rdc_data.sec_per_trk); | |
3d052595 | 691 | return rc; |
1da177e4 LT |
692 | } |
693 | ||
694 | static struct dasd_ccw_req * | |
695 | dasd_eckd_analysis_ccw(struct dasd_device *device) | |
696 | { | |
697 | struct dasd_eckd_private *private; | |
698 | struct eckd_count *count_data; | |
699 | struct LO_eckd_data *LO_data; | |
700 | struct dasd_ccw_req *cqr; | |
701 | struct ccw1 *ccw; | |
702 | int cplength, datasize; | |
703 | int i; | |
704 | ||
705 | private = (struct dasd_eckd_private *) device->private; | |
706 | ||
707 | cplength = 8; | |
708 | datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); | |
709 | cqr = dasd_smalloc_request(dasd_eckd_discipline.name, | |
710 | cplength, datasize, device); | |
711 | if (IS_ERR(cqr)) | |
712 | return cqr; | |
713 | ccw = cqr->cpaddr; | |
714 | /* Define extent for the first 3 tracks. */ | |
715 | define_extent(ccw++, cqr->data, 0, 2, | |
716 | DASD_ECKD_CCW_READ_COUNT, device); | |
717 | LO_data = cqr->data + sizeof (struct DE_eckd_data); | |
718 | /* Locate record for the first 4 records on track 0. */ | |
719 | ccw[-1].flags |= CCW_FLAG_CC; | |
720 | locate_record(ccw++, LO_data++, 0, 0, 4, | |
721 | DASD_ECKD_CCW_READ_COUNT, device, 0); | |
722 | ||
723 | count_data = private->count_area; | |
724 | for (i = 0; i < 4; i++) { | |
725 | ccw[-1].flags |= CCW_FLAG_CC; | |
726 | ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; | |
727 | ccw->flags = 0; | |
728 | ccw->count = 8; | |
729 | ccw->cda = (__u32)(addr_t) count_data; | |
730 | ccw++; | |
731 | count_data++; | |
732 | } | |
733 | ||
734 | /* Locate record for the first record on track 2. */ | |
735 | ccw[-1].flags |= CCW_FLAG_CC; | |
736 | locate_record(ccw++, LO_data++, 2, 0, 1, | |
737 | DASD_ECKD_CCW_READ_COUNT, device, 0); | |
738 | /* Read count ccw. */ | |
739 | ccw[-1].flags |= CCW_FLAG_CC; | |
740 | ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; | |
741 | ccw->flags = 0; | |
742 | ccw->count = 8; | |
743 | ccw->cda = (__u32)(addr_t) count_data; | |
744 | ||
745 | cqr->device = device; | |
746 | cqr->retries = 0; | |
747 | cqr->buildclk = get_clock(); | |
748 | cqr->status = DASD_CQR_FILLED; | |
749 | return cqr; | |
750 | } | |
751 | ||
752 | /* | |
753 | * This is the callback function for the init_analysis cqr. It saves | |
754 | * the status of the initial analysis ccw before it frees it and kicks | |
755 | * the device to continue the startup sequence. This will call | |
756 | * dasd_eckd_do_analysis again (if the devices has not been marked | |
757 | * for deletion in the meantime). | |
758 | */ | |
759 | static void | |
760 | dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, void *data) | |
761 | { | |
762 | struct dasd_eckd_private *private; | |
763 | struct dasd_device *device; | |
764 | ||
765 | device = init_cqr->device; | |
766 | private = (struct dasd_eckd_private *) device->private; | |
767 | private->init_cqr_status = init_cqr->status; | |
768 | dasd_sfree_request(init_cqr, device); | |
769 | dasd_kick_device(device); | |
770 | } | |
771 | ||
772 | static int | |
773 | dasd_eckd_start_analysis(struct dasd_device *device) | |
774 | { | |
775 | struct dasd_eckd_private *private; | |
776 | struct dasd_ccw_req *init_cqr; | |
777 | ||
778 | private = (struct dasd_eckd_private *) device->private; | |
779 | init_cqr = dasd_eckd_analysis_ccw(device); | |
780 | if (IS_ERR(init_cqr)) | |
781 | return PTR_ERR(init_cqr); | |
782 | init_cqr->callback = dasd_eckd_analysis_callback; | |
783 | init_cqr->callback_data = NULL; | |
784 | init_cqr->expires = 5*HZ; | |
785 | dasd_add_request_head(init_cqr); | |
786 | return -EAGAIN; | |
787 | } | |
788 | ||
789 | static int | |
790 | dasd_eckd_end_analysis(struct dasd_device *device) | |
791 | { | |
792 | struct dasd_eckd_private *private; | |
793 | struct eckd_count *count_area; | |
794 | unsigned int sb, blk_per_trk; | |
795 | int status, i; | |
796 | ||
797 | private = (struct dasd_eckd_private *) device->private; | |
798 | status = private->init_cqr_status; | |
799 | private->init_cqr_status = -1; | |
800 | if (status != DASD_CQR_DONE) { | |
801 | DEV_MESSAGE(KERN_WARNING, device, "%s", | |
802 | "volume analysis returned unformatted disk"); | |
803 | return -EMEDIUMTYPE; | |
804 | } | |
805 | ||
806 | private->uses_cdl = 1; | |
807 | /* Calculate number of blocks/records per track. */ | |
808 | blk_per_trk = recs_per_track(&private->rdc_data, 0, device->bp_block); | |
809 | /* Check Track 0 for Compatible Disk Layout */ | |
810 | count_area = NULL; | |
811 | for (i = 0; i < 3; i++) { | |
812 | if (private->count_area[i].kl != 4 || | |
813 | private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) { | |
814 | private->uses_cdl = 0; | |
815 | break; | |
816 | } | |
817 | } | |
818 | if (i == 3) | |
819 | count_area = &private->count_area[4]; | |
820 | ||
821 | if (private->uses_cdl == 0) { | |
822 | for (i = 0; i < 5; i++) { | |
823 | if ((private->count_area[i].kl != 0) || | |
824 | (private->count_area[i].dl != | |
825 | private->count_area[0].dl)) | |
826 | break; | |
827 | } | |
828 | if (i == 5) | |
829 | count_area = &private->count_area[0]; | |
830 | } else { | |
831 | if (private->count_area[3].record == 1) | |
832 | DEV_MESSAGE(KERN_WARNING, device, "%s", | |
833 | "Trk 0: no records after VTOC!"); | |
834 | } | |
835 | if (count_area != NULL && count_area->kl == 0) { | |
836 | /* we found notthing violating our disk layout */ | |
837 | if (dasd_check_blocksize(count_area->dl) == 0) | |
838 | device->bp_block = count_area->dl; | |
839 | } | |
840 | if (device->bp_block == 0) { | |
841 | DEV_MESSAGE(KERN_WARNING, device, "%s", | |
842 | "Volume has incompatible disk layout"); | |
843 | return -EMEDIUMTYPE; | |
844 | } | |
845 | device->s2b_shift = 0; /* bits to shift 512 to get a block */ | |
846 | for (sb = 512; sb < device->bp_block; sb = sb << 1) | |
847 | device->s2b_shift++; | |
848 | ||
849 | blk_per_trk = recs_per_track(&private->rdc_data, 0, device->bp_block); | |
850 | device->blocks = (private->rdc_data.no_cyl * | |
851 | private->rdc_data.trk_per_cyl * | |
852 | blk_per_trk); | |
853 | ||
854 | DEV_MESSAGE(KERN_INFO, device, | |
855 | "(%dkB blks): %dkB at %dkB/trk %s", | |
856 | (device->bp_block >> 10), | |
857 | ((private->rdc_data.no_cyl * | |
858 | private->rdc_data.trk_per_cyl * | |
859 | blk_per_trk * (device->bp_block >> 9)) >> 1), | |
138c014d | 860 | ((blk_per_trk * device->bp_block) >> 10), |
1da177e4 LT |
861 | private->uses_cdl ? |
862 | "compatible disk layout" : "linux disk layout"); | |
863 | ||
864 | return 0; | |
865 | } | |
866 | ||
867 | static int | |
868 | dasd_eckd_do_analysis(struct dasd_device *device) | |
869 | { | |
870 | struct dasd_eckd_private *private; | |
871 | ||
872 | private = (struct dasd_eckd_private *) device->private; | |
873 | if (private->init_cqr_status < 0) | |
874 | return dasd_eckd_start_analysis(device); | |
875 | else | |
876 | return dasd_eckd_end_analysis(device); | |
877 | } | |
878 | ||
879 | static int | |
880 | dasd_eckd_fill_geometry(struct dasd_device *device, struct hd_geometry *geo) | |
881 | { | |
882 | struct dasd_eckd_private *private; | |
883 | ||
884 | private = (struct dasd_eckd_private *) device->private; | |
885 | if (dasd_check_blocksize(device->bp_block) == 0) { | |
886 | geo->sectors = recs_per_track(&private->rdc_data, | |
887 | 0, device->bp_block); | |
888 | } | |
889 | geo->cylinders = private->rdc_data.no_cyl; | |
890 | geo->heads = private->rdc_data.trk_per_cyl; | |
891 | return 0; | |
892 | } | |
893 | ||
894 | static struct dasd_ccw_req * | |
895 | dasd_eckd_format_device(struct dasd_device * device, | |
896 | struct format_data_t * fdata) | |
897 | { | |
898 | struct dasd_eckd_private *private; | |
899 | struct dasd_ccw_req *fcp; | |
900 | struct eckd_count *ect; | |
901 | struct ccw1 *ccw; | |
902 | void *data; | |
903 | int rpt, cyl, head; | |
904 | int cplength, datasize; | |
905 | int i; | |
906 | ||
907 | private = (struct dasd_eckd_private *) device->private; | |
908 | rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize); | |
909 | cyl = fdata->start_unit / private->rdc_data.trk_per_cyl; | |
910 | head = fdata->start_unit % private->rdc_data.trk_per_cyl; | |
911 | ||
912 | /* Sanity checks. */ | |
913 | if (fdata->start_unit >= | |
914 | (private->rdc_data.no_cyl * private->rdc_data.trk_per_cyl)) { | |
915 | DEV_MESSAGE(KERN_INFO, device, "Track no %d too big!", | |
916 | fdata->start_unit); | |
917 | return ERR_PTR(-EINVAL); | |
918 | } | |
919 | if (fdata->start_unit > fdata->stop_unit) { | |
920 | DEV_MESSAGE(KERN_INFO, device, "Track %d reached! ending.", | |
921 | fdata->start_unit); | |
922 | return ERR_PTR(-EINVAL); | |
923 | } | |
924 | if (dasd_check_blocksize(fdata->blksize) != 0) { | |
925 | DEV_MESSAGE(KERN_WARNING, device, | |
926 | "Invalid blocksize %d...terminating!", | |
927 | fdata->blksize); | |
928 | return ERR_PTR(-EINVAL); | |
929 | } | |
930 | ||
931 | /* | |
932 | * fdata->intensity is a bit string that tells us what to do: | |
933 | * Bit 0: write record zero | |
934 | * Bit 1: write home address, currently not supported | |
935 | * Bit 2: invalidate tracks | |
936 | * Bit 3: use OS/390 compatible disk layout (cdl) | |
937 | * Only some bit combinations do make sense. | |
938 | */ | |
939 | switch (fdata->intensity) { | |
940 | case 0x00: /* Normal format */ | |
941 | case 0x08: /* Normal format, use cdl. */ | |
942 | cplength = 2 + rpt; | |
943 | datasize = sizeof(struct DE_eckd_data) + | |
944 | sizeof(struct LO_eckd_data) + | |
945 | rpt * sizeof(struct eckd_count); | |
946 | break; | |
947 | case 0x01: /* Write record zero and format track. */ | |
948 | case 0x09: /* Write record zero and format track, use cdl. */ | |
949 | cplength = 3 + rpt; | |
950 | datasize = sizeof(struct DE_eckd_data) + | |
951 | sizeof(struct LO_eckd_data) + | |
952 | sizeof(struct eckd_count) + | |
953 | rpt * sizeof(struct eckd_count); | |
954 | break; | |
955 | case 0x04: /* Invalidate track. */ | |
956 | case 0x0c: /* Invalidate track, use cdl. */ | |
957 | cplength = 3; | |
958 | datasize = sizeof(struct DE_eckd_data) + | |
959 | sizeof(struct LO_eckd_data) + | |
960 | sizeof(struct eckd_count); | |
961 | break; | |
962 | default: | |
963 | DEV_MESSAGE(KERN_WARNING, device, "Invalid flags 0x%x.", | |
964 | fdata->intensity); | |
965 | return ERR_PTR(-EINVAL); | |
966 | } | |
967 | /* Allocate the format ccw request. */ | |
968 | fcp = dasd_smalloc_request(dasd_eckd_discipline.name, | |
969 | cplength, datasize, device); | |
970 | if (IS_ERR(fcp)) | |
971 | return fcp; | |
972 | ||
973 | data = fcp->data; | |
974 | ccw = fcp->cpaddr; | |
975 | ||
976 | switch (fdata->intensity & ~0x08) { | |
977 | case 0x00: /* Normal format. */ | |
978 | define_extent(ccw++, (struct DE_eckd_data *) data, | |
979 | fdata->start_unit, fdata->start_unit, | |
980 | DASD_ECKD_CCW_WRITE_CKD, device); | |
981 | data += sizeof(struct DE_eckd_data); | |
982 | ccw[-1].flags |= CCW_FLAG_CC; | |
983 | locate_record(ccw++, (struct LO_eckd_data *) data, | |
984 | fdata->start_unit, 0, rpt, | |
985 | DASD_ECKD_CCW_WRITE_CKD, device, | |
986 | fdata->blksize); | |
987 | data += sizeof(struct LO_eckd_data); | |
988 | break; | |
989 | case 0x01: /* Write record zero + format track. */ | |
990 | define_extent(ccw++, (struct DE_eckd_data *) data, | |
991 | fdata->start_unit, fdata->start_unit, | |
992 | DASD_ECKD_CCW_WRITE_RECORD_ZERO, | |
993 | device); | |
994 | data += sizeof(struct DE_eckd_data); | |
995 | ccw[-1].flags |= CCW_FLAG_CC; | |
996 | locate_record(ccw++, (struct LO_eckd_data *) data, | |
997 | fdata->start_unit, 0, rpt + 1, | |
998 | DASD_ECKD_CCW_WRITE_RECORD_ZERO, device, | |
999 | device->bp_block); | |
1000 | data += sizeof(struct LO_eckd_data); | |
1001 | break; | |
1002 | case 0x04: /* Invalidate track. */ | |
1003 | define_extent(ccw++, (struct DE_eckd_data *) data, | |
1004 | fdata->start_unit, fdata->start_unit, | |
1005 | DASD_ECKD_CCW_WRITE_CKD, device); | |
1006 | data += sizeof(struct DE_eckd_data); | |
1007 | ccw[-1].flags |= CCW_FLAG_CC; | |
1008 | locate_record(ccw++, (struct LO_eckd_data *) data, | |
1009 | fdata->start_unit, 0, 1, | |
1010 | DASD_ECKD_CCW_WRITE_CKD, device, 8); | |
1011 | data += sizeof(struct LO_eckd_data); | |
1012 | break; | |
1013 | } | |
1014 | if (fdata->intensity & 0x01) { /* write record zero */ | |
1015 | ect = (struct eckd_count *) data; | |
1016 | data += sizeof(struct eckd_count); | |
1017 | ect->cyl = cyl; | |
1018 | ect->head = head; | |
1019 | ect->record = 0; | |
1020 | ect->kl = 0; | |
1021 | ect->dl = 8; | |
1022 | ccw[-1].flags |= CCW_FLAG_CC; | |
1023 | ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; | |
1024 | ccw->flags = CCW_FLAG_SLI; | |
1025 | ccw->count = 8; | |
1026 | ccw->cda = (__u32)(addr_t) ect; | |
1027 | ccw++; | |
1028 | } | |
1029 | if ((fdata->intensity & ~0x08) & 0x04) { /* erase track */ | |
1030 | ect = (struct eckd_count *) data; | |
1031 | data += sizeof(struct eckd_count); | |
1032 | ect->cyl = cyl; | |
1033 | ect->head = head; | |
1034 | ect->record = 1; | |
1035 | ect->kl = 0; | |
1036 | ect->dl = 0; | |
1037 | ccw[-1].flags |= CCW_FLAG_CC; | |
1038 | ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; | |
1039 | ccw->flags = CCW_FLAG_SLI; | |
1040 | ccw->count = 8; | |
1041 | ccw->cda = (__u32)(addr_t) ect; | |
1042 | } else { /* write remaining records */ | |
1043 | for (i = 0; i < rpt; i++) { | |
1044 | ect = (struct eckd_count *) data; | |
1045 | data += sizeof(struct eckd_count); | |
1046 | ect->cyl = cyl; | |
1047 | ect->head = head; | |
1048 | ect->record = i + 1; | |
1049 | ect->kl = 0; | |
1050 | ect->dl = fdata->blksize; | |
1051 | /* Check for special tracks 0-1 when formatting CDL */ | |
1052 | if ((fdata->intensity & 0x08) && | |
1053 | fdata->start_unit == 0) { | |
1054 | if (i < 3) { | |
1055 | ect->kl = 4; | |
1056 | ect->dl = sizes_trk0[i] - 4; | |
138c014d | 1057 | } |
1da177e4 LT |
1058 | } |
1059 | if ((fdata->intensity & 0x08) && | |
1060 | fdata->start_unit == 1) { | |
1061 | ect->kl = 44; | |
1062 | ect->dl = LABEL_SIZE - 44; | |
1063 | } | |
1064 | ccw[-1].flags |= CCW_FLAG_CC; | |
1065 | ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; | |
1066 | ccw->flags = CCW_FLAG_SLI; | |
1067 | ccw->count = 8; | |
1068 | ccw->cda = (__u32)(addr_t) ect; | |
1069 | ccw++; | |
1070 | } | |
1071 | } | |
1072 | fcp->device = device; | |
1073 | fcp->retries = 2; /* set retry counter to enable ERP */ | |
1074 | fcp->buildclk = get_clock(); | |
1075 | fcp->status = DASD_CQR_FILLED; | |
1076 | return fcp; | |
1077 | } | |
1078 | ||
1079 | static dasd_era_t | |
1080 | dasd_eckd_examine_error(struct dasd_ccw_req * cqr, struct irb * irb) | |
1081 | { | |
1082 | struct dasd_device *device = (struct dasd_device *) cqr->device; | |
1083 | struct ccw_device *cdev = device->cdev; | |
1084 | ||
1085 | if (irb->scsw.cstat == 0x00 && | |
1086 | irb->scsw.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END)) | |
1087 | return dasd_era_none; | |
1088 | ||
1089 | switch (cdev->id.cu_type) { | |
1090 | case 0x3990: | |
1091 | case 0x2105: | |
1092 | case 0x2107: | |
1093 | case 0x1750: | |
1094 | return dasd_3990_erp_examine(cqr, irb); | |
1095 | case 0x9343: | |
1096 | return dasd_9343_erp_examine(cqr, irb); | |
1097 | case 0x3880: | |
1098 | default: | |
1099 | DEV_MESSAGE(KERN_WARNING, device, "%s", | |
1100 | "default (unknown CU type) - RECOVERABLE return"); | |
1101 | return dasd_era_recover; | |
1102 | } | |
1103 | } | |
1104 | ||
1105 | static dasd_erp_fn_t | |
1106 | dasd_eckd_erp_action(struct dasd_ccw_req * cqr) | |
1107 | { | |
1108 | struct dasd_device *device = (struct dasd_device *) cqr->device; | |
1109 | struct ccw_device *cdev = device->cdev; | |
1110 | ||
1111 | switch (cdev->id.cu_type) { | |
1112 | case 0x3990: | |
1113 | case 0x2105: | |
1114 | case 0x2107: | |
1115 | case 0x1750: | |
1116 | return dasd_3990_erp_action; | |
1117 | case 0x9343: | |
1118 | case 0x3880: | |
1119 | default: | |
1120 | return dasd_default_erp_action; | |
1121 | } | |
1122 | } | |
1123 | ||
1124 | static dasd_erp_fn_t | |
1125 | dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) | |
1126 | { | |
1127 | return dasd_default_erp_postaction; | |
1128 | } | |
1129 | ||
1130 | static struct dasd_ccw_req * | |
1131 | dasd_eckd_build_cp(struct dasd_device * device, struct request *req) | |
1132 | { | |
1133 | struct dasd_eckd_private *private; | |
1134 | unsigned long *idaws; | |
1135 | struct LO_eckd_data *LO_data; | |
1136 | struct dasd_ccw_req *cqr; | |
1137 | struct ccw1 *ccw; | |
1138 | struct bio *bio; | |
1139 | struct bio_vec *bv; | |
1140 | char *dst; | |
1141 | unsigned int blksize, blk_per_trk, off; | |
1142 | int count, cidaw, cplength, datasize; | |
1143 | sector_t recid, first_rec, last_rec; | |
1144 | sector_t first_trk, last_trk; | |
1145 | unsigned int first_offs, last_offs; | |
1146 | unsigned char cmd, rcmd; | |
1147 | int i; | |
1148 | ||
1149 | private = (struct dasd_eckd_private *) device->private; | |
1150 | if (rq_data_dir(req) == READ) | |
1151 | cmd = DASD_ECKD_CCW_READ_MT; | |
1152 | else if (rq_data_dir(req) == WRITE) | |
1153 | cmd = DASD_ECKD_CCW_WRITE_MT; | |
1154 | else | |
1155 | return ERR_PTR(-EINVAL); | |
1156 | /* Calculate number of blocks/records per track. */ | |
1157 | blksize = device->bp_block; | |
1158 | blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); | |
1159 | /* Calculate record id of first and last block. */ | |
1160 | first_rec = first_trk = req->sector >> device->s2b_shift; | |
1161 | first_offs = sector_div(first_trk, blk_per_trk); | |
1162 | last_rec = last_trk = | |
1163 | (req->sector + req->nr_sectors - 1) >> device->s2b_shift; | |
1164 | last_offs = sector_div(last_trk, blk_per_trk); | |
1165 | /* Check struct bio and count the number of blocks for the request. */ | |
1166 | count = 0; | |
1167 | cidaw = 0; | |
1168 | rq_for_each_bio(bio, req) { | |
1169 | bio_for_each_segment(bv, bio, i) { | |
1170 | if (bv->bv_len & (blksize - 1)) | |
1171 | /* Eckd can only do full blocks. */ | |
1172 | return ERR_PTR(-EINVAL); | |
1173 | count += bv->bv_len >> (device->s2b_shift + 9); | |
347a8dc3 | 1174 | #if defined(CONFIG_64BIT) |
1da177e4 LT |
1175 | if (idal_is_needed (page_address(bv->bv_page), |
1176 | bv->bv_len)) | |
1177 | cidaw += bv->bv_len >> (device->s2b_shift + 9); | |
1178 | #endif | |
1179 | } | |
1180 | } | |
1181 | /* Paranoia. */ | |
1182 | if (count != last_rec - first_rec + 1) | |
1183 | return ERR_PTR(-EINVAL); | |
1184 | /* 1x define extent + 1x locate record + number of blocks */ | |
1185 | cplength = 2 + count; | |
1186 | /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ | |
1187 | datasize = sizeof(struct DE_eckd_data) + sizeof(struct LO_eckd_data) + | |
1188 | cidaw * sizeof(unsigned long); | |
1189 | /* Find out the number of additional locate record ccws for cdl. */ | |
1190 | if (private->uses_cdl && first_rec < 2*blk_per_trk) { | |
1191 | if (last_rec >= 2*blk_per_trk) | |
1192 | count = 2*blk_per_trk - first_rec; | |
1193 | cplength += count; | |
1194 | datasize += count*sizeof(struct LO_eckd_data); | |
1195 | } | |
1196 | /* Allocate the ccw request. */ | |
1197 | cqr = dasd_smalloc_request(dasd_eckd_discipline.name, | |
1198 | cplength, datasize, device); | |
1199 | if (IS_ERR(cqr)) | |
1200 | return cqr; | |
1201 | ccw = cqr->cpaddr; | |
1202 | /* First ccw is define extent. */ | |
1203 | define_extent(ccw++, cqr->data, first_trk, last_trk, cmd, device); | |
1204 | /* Build locate_record+read/write/ccws. */ | |
1205 | idaws = (unsigned long *) (cqr->data + sizeof(struct DE_eckd_data)); | |
1206 | LO_data = (struct LO_eckd_data *) (idaws + cidaw); | |
1207 | recid = first_rec; | |
1208 | if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { | |
1209 | /* Only standard blocks so there is just one locate record. */ | |
1210 | ccw[-1].flags |= CCW_FLAG_CC; | |
1211 | locate_record(ccw++, LO_data++, first_trk, first_offs + 1, | |
1212 | last_rec - recid + 1, cmd, device, blksize); | |
1213 | } | |
1214 | rq_for_each_bio(bio, req) bio_for_each_segment(bv, bio, i) { | |
1215 | dst = page_address(bv->bv_page) + bv->bv_offset; | |
1216 | if (dasd_page_cache) { | |
1217 | char *copy = kmem_cache_alloc(dasd_page_cache, | |
441e143e | 1218 | GFP_DMA | __GFP_NOWARN); |
1da177e4 LT |
1219 | if (copy && rq_data_dir(req) == WRITE) |
1220 | memcpy(copy + bv->bv_offset, dst, bv->bv_len); | |
1221 | if (copy) | |
1222 | dst = copy + bv->bv_offset; | |
1223 | } | |
1224 | for (off = 0; off < bv->bv_len; off += blksize) { | |
1225 | sector_t trkid = recid; | |
1226 | unsigned int recoffs = sector_div(trkid, blk_per_trk); | |
1227 | rcmd = cmd; | |
1228 | count = blksize; | |
1229 | /* Locate record for cdl special block ? */ | |
1230 | if (private->uses_cdl && recid < 2*blk_per_trk) { | |
1231 | if (dasd_eckd_cdl_special(blk_per_trk, recid)){ | |
1232 | rcmd |= 0x8; | |
1233 | count = dasd_eckd_cdl_reclen(recid); | |
ec5883ab HH |
1234 | if (count < blksize && |
1235 | rq_data_dir(req) == READ) | |
1da177e4 LT |
1236 | memset(dst + count, 0xe5, |
1237 | blksize - count); | |
1238 | } | |
1239 | ccw[-1].flags |= CCW_FLAG_CC; | |
1240 | locate_record(ccw++, LO_data++, | |
1241 | trkid, recoffs + 1, | |
1242 | 1, rcmd, device, count); | |
1243 | } | |
1244 | /* Locate record for standard blocks ? */ | |
1245 | if (private->uses_cdl && recid == 2*blk_per_trk) { | |
1246 | ccw[-1].flags |= CCW_FLAG_CC; | |
1247 | locate_record(ccw++, LO_data++, | |
1248 | trkid, recoffs + 1, | |
1249 | last_rec - recid + 1, | |
1250 | cmd, device, count); | |
1251 | } | |
1252 | /* Read/write ccw. */ | |
1253 | ccw[-1].flags |= CCW_FLAG_CC; | |
1254 | ccw->cmd_code = rcmd; | |
1255 | ccw->count = count; | |
1256 | if (idal_is_needed(dst, blksize)) { | |
1257 | ccw->cda = (__u32)(addr_t) idaws; | |
1258 | ccw->flags = CCW_FLAG_IDA; | |
1259 | idaws = idal_create_words(idaws, dst, blksize); | |
1260 | } else { | |
1261 | ccw->cda = (__u32)(addr_t) dst; | |
1262 | ccw->flags = 0; | |
1263 | } | |
1264 | ccw++; | |
1265 | dst += blksize; | |
1266 | recid++; | |
1267 | } | |
1268 | } | |
4aff5e23 | 1269 | if (req->cmd_flags & REQ_FAILFAST) |
1c01b8a5 | 1270 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
1da177e4 LT |
1271 | cqr->device = device; |
1272 | cqr->expires = 5 * 60 * HZ; /* 5 minutes */ | |
1273 | cqr->lpm = private->path_data.ppm; | |
1274 | cqr->retries = 256; | |
1275 | cqr->buildclk = get_clock(); | |
1276 | cqr->status = DASD_CQR_FILLED; | |
1277 | return cqr; | |
1278 | } | |
1279 | ||
1280 | static int | |
1281 | dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) | |
1282 | { | |
1283 | struct dasd_eckd_private *private; | |
1284 | struct ccw1 *ccw; | |
1285 | struct bio *bio; | |
1286 | struct bio_vec *bv; | |
1287 | char *dst, *cda; | |
1288 | unsigned int blksize, blk_per_trk, off; | |
1289 | sector_t recid; | |
1290 | int i, status; | |
1291 | ||
1292 | if (!dasd_page_cache) | |
1293 | goto out; | |
1294 | private = (struct dasd_eckd_private *) cqr->device->private; | |
1295 | blksize = cqr->device->bp_block; | |
1296 | blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); | |
1297 | recid = req->sector >> cqr->device->s2b_shift; | |
1298 | ccw = cqr->cpaddr; | |
1299 | /* Skip over define extent & locate record. */ | |
1300 | ccw++; | |
1301 | if (private->uses_cdl == 0 || recid > 2*blk_per_trk) | |
1302 | ccw++; | |
1303 | rq_for_each_bio(bio, req) bio_for_each_segment(bv, bio, i) { | |
1304 | dst = page_address(bv->bv_page) + bv->bv_offset; | |
1305 | for (off = 0; off < bv->bv_len; off += blksize) { | |
1306 | /* Skip locate record. */ | |
1307 | if (private->uses_cdl && recid <= 2*blk_per_trk) | |
1308 | ccw++; | |
1309 | if (dst) { | |
1310 | if (ccw->flags & CCW_FLAG_IDA) | |
1311 | cda = *((char **)((addr_t) ccw->cda)); | |
1312 | else | |
1313 | cda = (char *)((addr_t) ccw->cda); | |
1314 | if (dst != cda) { | |
1315 | if (rq_data_dir(req) == READ) | |
1316 | memcpy(dst, cda, bv->bv_len); | |
1317 | kmem_cache_free(dasd_page_cache, | |
1318 | (void *)((addr_t)cda & PAGE_MASK)); | |
1319 | } | |
1320 | dst = NULL; | |
1321 | } | |
1322 | ccw++; | |
1323 | recid++; | |
1324 | } | |
1325 | } | |
1326 | out: | |
1327 | status = cqr->status == DASD_CQR_DONE; | |
1328 | dasd_sfree_request(cqr, cqr->device); | |
1329 | return status; | |
1330 | } | |
1331 | ||
1332 | static int | |
1333 | dasd_eckd_fill_info(struct dasd_device * device, | |
1334 | struct dasd_information2_t * info) | |
1335 | { | |
1336 | struct dasd_eckd_private *private; | |
1337 | ||
1338 | private = (struct dasd_eckd_private *) device->private; | |
1339 | info->label_block = 2; | |
1340 | info->FBA_layout = private->uses_cdl ? 0 : 1; | |
1341 | info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; | |
1342 | info->characteristics_size = sizeof(struct dasd_eckd_characteristics); | |
1343 | memcpy(info->characteristics, &private->rdc_data, | |
1344 | sizeof(struct dasd_eckd_characteristics)); | |
1345 | info->confdata_size = sizeof (struct dasd_eckd_confdata); | |
1346 | memcpy(info->configuration_data, &private->conf_data, | |
1347 | sizeof (struct dasd_eckd_confdata)); | |
1348 | return 0; | |
1349 | } | |
1350 | ||
1351 | /* | |
1352 | * SECTION: ioctl functions for eckd devices. | |
1353 | */ | |
1354 | ||
1355 | /* | |
1356 | * Release device ioctl. | |
138c014d | 1357 | * Buils a channel programm to releases a prior reserved |
1da177e4 LT |
1358 | * (see dasd_eckd_reserve) device. |
1359 | */ | |
1360 | static int | |
1107ccfb | 1361 | dasd_eckd_release(struct dasd_device *device) |
1da177e4 | 1362 | { |
1da177e4 LT |
1363 | struct dasd_ccw_req *cqr; |
1364 | int rc; | |
1365 | ||
1366 | if (!capable(CAP_SYS_ADMIN)) | |
1367 | return -EACCES; | |
1368 | ||
1da177e4 LT |
1369 | cqr = dasd_smalloc_request(dasd_eckd_discipline.name, |
1370 | 1, 32, device); | |
1371 | if (IS_ERR(cqr)) { | |
1372 | DEV_MESSAGE(KERN_WARNING, device, "%s", | |
1373 | "Could not allocate initialization request"); | |
1374 | return PTR_ERR(cqr); | |
1375 | } | |
1376 | cqr->cpaddr->cmd_code = DASD_ECKD_CCW_RELEASE; | |
1377 | cqr->cpaddr->flags |= CCW_FLAG_SLI; | |
1378 | cqr->cpaddr->count = 32; | |
1379 | cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; | |
1380 | cqr->device = device; | |
1381 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); | |
1c01b8a5 | 1382 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
1da177e4 LT |
1383 | cqr->retries = 0; |
1384 | cqr->expires = 2 * HZ; | |
1385 | cqr->buildclk = get_clock(); | |
1386 | cqr->status = DASD_CQR_FILLED; | |
1387 | ||
1388 | rc = dasd_sleep_on_immediatly(cqr); | |
1389 | ||
1390 | dasd_sfree_request(cqr, cqr->device); | |
1391 | return rc; | |
1392 | } | |
1393 | ||
1394 | /* | |
1395 | * Reserve device ioctl. | |
1396 | * Options are set to 'synchronous wait for interrupt' and | |
138c014d HH |
1397 | * 'timeout the request'. This leads to a terminate IO if |
1398 | * the interrupt is outstanding for a certain time. | |
1da177e4 LT |
1399 | */ |
1400 | static int | |
1107ccfb | 1401 | dasd_eckd_reserve(struct dasd_device *device) |
1da177e4 | 1402 | { |
1da177e4 LT |
1403 | struct dasd_ccw_req *cqr; |
1404 | int rc; | |
1405 | ||
1406 | if (!capable(CAP_SYS_ADMIN)) | |
1407 | return -EACCES; | |
1408 | ||
1da177e4 LT |
1409 | cqr = dasd_smalloc_request(dasd_eckd_discipline.name, |
1410 | 1, 32, device); | |
1411 | if (IS_ERR(cqr)) { | |
1412 | DEV_MESSAGE(KERN_WARNING, device, "%s", | |
1413 | "Could not allocate initialization request"); | |
1414 | return PTR_ERR(cqr); | |
1415 | } | |
1416 | cqr->cpaddr->cmd_code = DASD_ECKD_CCW_RESERVE; | |
1417 | cqr->cpaddr->flags |= CCW_FLAG_SLI; | |
1418 | cqr->cpaddr->count = 32; | |
1419 | cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; | |
1420 | cqr->device = device; | |
1421 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); | |
1c01b8a5 | 1422 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
1da177e4 LT |
1423 | cqr->retries = 0; |
1424 | cqr->expires = 2 * HZ; | |
1425 | cqr->buildclk = get_clock(); | |
1426 | cqr->status = DASD_CQR_FILLED; | |
1427 | ||
1428 | rc = dasd_sleep_on_immediatly(cqr); | |
1429 | ||
1430 | dasd_sfree_request(cqr, cqr->device); | |
1431 | return rc; | |
1432 | } | |
1433 | ||
1434 | /* | |
1435 | * Steal lock ioctl - unconditional reserve device. | |
138c014d | 1436 | * Buils a channel programm to break a device's reservation. |
1da177e4 LT |
1437 | * (unconditional reserve) |
1438 | */ | |
1439 | static int | |
1107ccfb | 1440 | dasd_eckd_steal_lock(struct dasd_device *device) |
1da177e4 | 1441 | { |
1da177e4 LT |
1442 | struct dasd_ccw_req *cqr; |
1443 | int rc; | |
1444 | ||
1445 | if (!capable(CAP_SYS_ADMIN)) | |
1446 | return -EACCES; | |
1447 | ||
1da177e4 LT |
1448 | cqr = dasd_smalloc_request(dasd_eckd_discipline.name, |
1449 | 1, 32, device); | |
1450 | if (IS_ERR(cqr)) { | |
1451 | DEV_MESSAGE(KERN_WARNING, device, "%s", | |
1452 | "Could not allocate initialization request"); | |
1453 | return PTR_ERR(cqr); | |
1454 | } | |
1455 | cqr->cpaddr->cmd_code = DASD_ECKD_CCW_SLCK; | |
1456 | cqr->cpaddr->flags |= CCW_FLAG_SLI; | |
1457 | cqr->cpaddr->count = 32; | |
1458 | cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; | |
1459 | cqr->device = device; | |
1460 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); | |
1c01b8a5 | 1461 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
1da177e4 LT |
1462 | cqr->retries = 0; |
1463 | cqr->expires = 2 * HZ; | |
1464 | cqr->buildclk = get_clock(); | |
1465 | cqr->status = DASD_CQR_FILLED; | |
1466 | ||
1467 | rc = dasd_sleep_on_immediatly(cqr); | |
1468 | ||
1469 | dasd_sfree_request(cqr, cqr->device); | |
1470 | return rc; | |
1471 | } | |
1472 | ||
1473 | /* | |
1474 | * Read performance statistics | |
1475 | */ | |
1476 | static int | |
1107ccfb | 1477 | dasd_eckd_performance(struct dasd_device *device, void __user *argp) |
1da177e4 | 1478 | { |
1da177e4 LT |
1479 | struct dasd_psf_prssd_data *prssdp; |
1480 | struct dasd_rssd_perf_stats_t *stats; | |
1481 | struct dasd_ccw_req *cqr; | |
1482 | struct ccw1 *ccw; | |
1483 | int rc; | |
1484 | ||
1da177e4 LT |
1485 | cqr = dasd_smalloc_request(dasd_eckd_discipline.name, |
1486 | 1 /* PSF */ + 1 /* RSSD */ , | |
1487 | (sizeof (struct dasd_psf_prssd_data) + | |
1488 | sizeof (struct dasd_rssd_perf_stats_t)), | |
1489 | device); | |
1490 | if (IS_ERR(cqr)) { | |
1491 | DEV_MESSAGE(KERN_WARNING, device, "%s", | |
1492 | "Could not allocate initialization request"); | |
1493 | return PTR_ERR(cqr); | |
1494 | } | |
1495 | cqr->device = device; | |
1496 | cqr->retries = 0; | |
1497 | cqr->expires = 10 * HZ; | |
1498 | ||
1499 | /* Prepare for Read Subsystem Data */ | |
1500 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
1501 | memset(prssdp, 0, sizeof (struct dasd_psf_prssd_data)); | |
1502 | prssdp->order = PSF_ORDER_PRSSD; | |
1503 | prssdp->suborder = 0x01; /* Perfomance Statistics */ | |
1504 | prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ | |
1505 | ||
1506 | ccw = cqr->cpaddr; | |
1507 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
1508 | ccw->count = sizeof (struct dasd_psf_prssd_data); | |
1509 | ccw->flags |= CCW_FLAG_CC; | |
1510 | ccw->cda = (__u32)(addr_t) prssdp; | |
1511 | ||
1512 | /* Read Subsystem Data - Performance Statistics */ | |
1513 | stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); | |
1514 | memset(stats, 0, sizeof (struct dasd_rssd_perf_stats_t)); | |
1515 | ||
1516 | ccw++; | |
1517 | ccw->cmd_code = DASD_ECKD_CCW_RSSD; | |
1518 | ccw->count = sizeof (struct dasd_rssd_perf_stats_t); | |
1519 | ccw->cda = (__u32)(addr_t) stats; | |
1520 | ||
1521 | cqr->buildclk = get_clock(); | |
1522 | cqr->status = DASD_CQR_FILLED; | |
1523 | rc = dasd_sleep_on(cqr); | |
1524 | if (rc == 0) { | |
1525 | /* Prepare for Read Subsystem Data */ | |
1526 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
1527 | stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); | |
1107ccfb CH |
1528 | if (copy_to_user(argp, stats, |
1529 | sizeof(struct dasd_rssd_perf_stats_t))) | |
1530 | rc = -EFAULT; | |
1da177e4 LT |
1531 | } |
1532 | dasd_sfree_request(cqr, cqr->device); | |
1533 | return rc; | |
1534 | } | |
1535 | ||
1536 | /* | |
1537 | * Get attributes (cache operations) | |
1538 | * Returnes the cache attributes used in Define Extend (DE). | |
1539 | */ | |
1540 | static int | |
1107ccfb | 1541 | dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) |
1da177e4 | 1542 | { |
1107ccfb CH |
1543 | struct dasd_eckd_private *private = |
1544 | (struct dasd_eckd_private *)device->private; | |
1545 | struct attrib_data_t attrib = private->attrib; | |
1da177e4 LT |
1546 | int rc; |
1547 | ||
1548 | if (!capable(CAP_SYS_ADMIN)) | |
1549 | return -EACCES; | |
1107ccfb | 1550 | if (!argp) |
1da177e4 LT |
1551 | return -EINVAL; |
1552 | ||
1107ccfb CH |
1553 | rc = 0; |
1554 | if (copy_to_user(argp, (long *) &attrib, | |
1555 | sizeof (struct attrib_data_t))) | |
1556 | rc = -EFAULT; | |
1da177e4 LT |
1557 | |
1558 | return rc; | |
1559 | } | |
1560 | ||
1561 | /* | |
1562 | * Set attributes (cache operations) | |
1563 | * Stores the attributes for cache operation to be used in Define Extend (DE). | |
1564 | */ | |
1565 | static int | |
1107ccfb | 1566 | dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) |
1da177e4 | 1567 | { |
1107ccfb CH |
1568 | struct dasd_eckd_private *private = |
1569 | (struct dasd_eckd_private *)device->private; | |
1da177e4 LT |
1570 | struct attrib_data_t attrib; |
1571 | ||
1572 | if (!capable(CAP_SYS_ADMIN)) | |
1573 | return -EACCES; | |
1107ccfb | 1574 | if (!argp) |
1da177e4 LT |
1575 | return -EINVAL; |
1576 | ||
1107ccfb | 1577 | if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) |
1da177e4 | 1578 | return -EFAULT; |
1da177e4 LT |
1579 | private->attrib = attrib; |
1580 | ||
1581 | DEV_MESSAGE(KERN_INFO, device, | |
1582 | "cache operation mode set to %x (%i cylinder prestage)", | |
1583 | private->attrib.operation, private->attrib.nr_cyl); | |
1584 | return 0; | |
1585 | } | |
1586 | ||
1107ccfb CH |
1587 | static int |
1588 | dasd_eckd_ioctl(struct dasd_device *device, unsigned int cmd, void __user *argp) | |
1589 | { | |
1590 | switch (cmd) { | |
1591 | case BIODASDGATTR: | |
1592 | return dasd_eckd_get_attrib(device, argp); | |
1593 | case BIODASDSATTR: | |
1594 | return dasd_eckd_set_attrib(device, argp); | |
1595 | case BIODASDPSRD: | |
1596 | return dasd_eckd_performance(device, argp); | |
1597 | case BIODASDRLSE: | |
1598 | return dasd_eckd_release(device); | |
1599 | case BIODASDRSRV: | |
1600 | return dasd_eckd_reserve(device); | |
1601 | case BIODASDSLCK: | |
1602 | return dasd_eckd_steal_lock(device); | |
1603 | default: | |
1604 | return -ENOIOCTLCMD; | |
1605 | } | |
1606 | } | |
1607 | ||
445b5b49 HH |
1608 | /* |
1609 | * Dump the range of CCWs into 'page' buffer | |
1610 | * and return number of printed chars. | |
1611 | */ | |
1612 | static inline int | |
1613 | dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) | |
1614 | { | |
1615 | int len, count; | |
1616 | char *datap; | |
1617 | ||
1618 | len = 0; | |
1619 | while (from <= to) { | |
1620 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER | |
1621 | " CCW %p: %08X %08X DAT:", | |
1622 | from, ((int *) from)[0], ((int *) from)[1]); | |
1623 | ||
1624 | /* get pointer to data (consider IDALs) */ | |
1625 | if (from->flags & CCW_FLAG_IDA) | |
1626 | datap = (char *) *((addr_t *) (addr_t) from->cda); | |
1627 | else | |
1628 | datap = (char *) ((addr_t) from->cda); | |
1629 | ||
1630 | /* dump data (max 32 bytes) */ | |
1631 | for (count = 0; count < from->count && count < 32; count++) { | |
1632 | if (count % 8 == 0) len += sprintf(page + len, " "); | |
1633 | if (count % 4 == 0) len += sprintf(page + len, " "); | |
1634 | len += sprintf(page + len, "%02x", datap[count]); | |
1635 | } | |
1636 | len += sprintf(page + len, "\n"); | |
1637 | from++; | |
1638 | } | |
1639 | return len; | |
1640 | } | |
1641 | ||
1da177e4 LT |
1642 | /* |
1643 | * Print sense data and related channel program. | |
1644 | * Parts are printed because printk buffer is only 1024 bytes. | |
1645 | */ | |
1646 | static void | |
1647 | dasd_eckd_dump_sense(struct dasd_device *device, struct dasd_ccw_req * req, | |
1648 | struct irb *irb) | |
1649 | { | |
1650 | char *page; | |
445b5b49 HH |
1651 | struct ccw1 *first, *last, *fail, *from, *to; |
1652 | int len, sl, sct; | |
1da177e4 LT |
1653 | |
1654 | page = (char *) get_zeroed_page(GFP_ATOMIC); | |
1655 | if (page == NULL) { | |
1656 | DEV_MESSAGE(KERN_ERR, device, " %s", | |
1657 | "No memory to dump sense data"); | |
1658 | return; | |
1659 | } | |
445b5b49 HH |
1660 | /* dump the sense data */ |
1661 | len = sprintf(page, KERN_ERR PRINTK_HEADER | |
1da177e4 LT |
1662 | " I/O status report for device %s:\n", |
1663 | device->cdev->dev.bus_id); | |
1664 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER | |
1665 | " in req: %p CS: 0x%02X DS: 0x%02X\n", req, | |
1666 | irb->scsw.cstat, irb->scsw.dstat); | |
1667 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER | |
1668 | " device %s: Failing CCW: %p\n", | |
1669 | device->cdev->dev.bus_id, | |
1670 | (void *) (addr_t) irb->scsw.cpa); | |
1671 | if (irb->esw.esw0.erw.cons) { | |
1672 | for (sl = 0; sl < 4; sl++) { | |
1673 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER | |
1674 | " Sense(hex) %2d-%2d:", | |
1675 | (8 * sl), ((8 * sl) + 7)); | |
1676 | ||
1677 | for (sct = 0; sct < 8; sct++) { | |
1678 | len += sprintf(page + len, " %02x", | |
1679 | irb->ecw[8 * sl + sct]); | |
1680 | } | |
1681 | len += sprintf(page + len, "\n"); | |
1682 | } | |
1683 | ||
1684 | if (irb->ecw[27] & DASD_SENSE_BIT_0) { | |
1685 | /* 24 Byte Sense Data */ | |
445b5b49 HH |
1686 | sprintf(page + len, KERN_ERR PRINTK_HEADER |
1687 | " 24 Byte: %x MSG %x, " | |
1688 | "%s MSGb to SYSOP\n", | |
1689 | irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, | |
1690 | irb->ecw[1] & 0x10 ? "" : "no"); | |
1da177e4 LT |
1691 | } else { |
1692 | /* 32 Byte Sense Data */ | |
445b5b49 HH |
1693 | sprintf(page + len, KERN_ERR PRINTK_HEADER |
1694 | " 32 Byte: Format: %x " | |
1695 | "Exception class %x\n", | |
1696 | irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); | |
1da177e4 LT |
1697 | } |
1698 | } else { | |
445b5b49 HH |
1699 | sprintf(page + len, KERN_ERR PRINTK_HEADER |
1700 | " SORRY - NO VALID SENSE AVAILABLE\n"); | |
1da177e4 | 1701 | } |
445b5b49 HH |
1702 | printk("%s", page); |
1703 | ||
1704 | /* dump the Channel Program (max 140 Bytes per line) */ | |
1705 | /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ | |
1706 | first = req->cpaddr; | |
1707 | for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); | |
1708 | to = min(first + 6, last); | |
1709 | len = sprintf(page, KERN_ERR PRINTK_HEADER | |
1da177e4 | 1710 | " Related CP in req: %p\n", req); |
445b5b49 HH |
1711 | dasd_eckd_dump_ccw_range(first, to, page + len); |
1712 | printk("%s", page); | |
1da177e4 | 1713 | |
445b5b49 HH |
1714 | /* print failing CCW area (maximum 4) */ |
1715 | /* scsw->cda is either valid or zero */ | |
1da177e4 | 1716 | len = 0; |
445b5b49 HH |
1717 | from = ++to; |
1718 | fail = (struct ccw1 *)(addr_t) irb->scsw.cpa; /* failing CCW */ | |
1719 | if (from < fail - 2) { | |
1720 | from = fail - 2; /* there is a gap - print header */ | |
1721 | len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n"); | |
1da177e4 | 1722 | } |
445b5b49 HH |
1723 | to = min(fail + 1, last); |
1724 | len += dasd_eckd_dump_ccw_range(from, to, page + len); | |
1da177e4 | 1725 | |
445b5b49 HH |
1726 | /* print last CCWs (maximum 2) */ |
1727 | from = max(from, ++to); | |
1728 | if (from < last - 1) { | |
1729 | from = last - 1; /* there is a gap - print header */ | |
1da177e4 LT |
1730 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n"); |
1731 | } | |
445b5b49 | 1732 | len += dasd_eckd_dump_ccw_range(from, last, page + len); |
1da177e4 | 1733 | if (len > 0) |
445b5b49 | 1734 | printk("%s", page); |
1da177e4 LT |
1735 | free_page((unsigned long) page); |
1736 | } | |
1737 | ||
1738 | /* | |
1739 | * max_blocks is dependent on the amount of storage that is available | |
1740 | * in the static io buffer for each device. Currently each device has | |
1741 | * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has | |
1742 | * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use | |
1743 | * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In | |
1744 | * addition we have one define extent ccw + 16 bytes of data and one | |
1745 | * locate record ccw + 16 bytes of data. That makes: | |
1746 | * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. | |
1747 | * We want to fit two into the available memory so that we can immediately | |
1748 | * start the next request if one finishes off. That makes 249.5 blocks | |
1749 | * for one request. Give a little safety and the result is 240. | |
1750 | */ | |
1751 | static struct dasd_discipline dasd_eckd_discipline = { | |
1752 | .owner = THIS_MODULE, | |
1753 | .name = "ECKD", | |
1754 | .ebcname = "ECKD", | |
1755 | .max_blocks = 240, | |
1756 | .check_device = dasd_eckd_check_characteristics, | |
1757 | .do_analysis = dasd_eckd_do_analysis, | |
1758 | .fill_geometry = dasd_eckd_fill_geometry, | |
1759 | .start_IO = dasd_start_IO, | |
1760 | .term_IO = dasd_term_IO, | |
1761 | .format_device = dasd_eckd_format_device, | |
1762 | .examine_error = dasd_eckd_examine_error, | |
1763 | .erp_action = dasd_eckd_erp_action, | |
1764 | .erp_postaction = dasd_eckd_erp_postaction, | |
1765 | .build_cp = dasd_eckd_build_cp, | |
1766 | .free_cp = dasd_eckd_free_cp, | |
1767 | .dump_sense = dasd_eckd_dump_sense, | |
1768 | .fill_info = dasd_eckd_fill_info, | |
1107ccfb | 1769 | .ioctl = dasd_eckd_ioctl, |
1da177e4 LT |
1770 | }; |
1771 | ||
1772 | static int __init | |
1773 | dasd_eckd_init(void) | |
1774 | { | |
1da177e4 | 1775 | ASCEBC(dasd_eckd_discipline.ebcname, 4); |
40545573 | 1776 | return ccw_driver_register(&dasd_eckd_driver); |
1da177e4 LT |
1777 | } |
1778 | ||
1779 | static void __exit | |
1780 | dasd_eckd_cleanup(void) | |
1781 | { | |
1782 | ccw_driver_unregister(&dasd_eckd_driver); | |
1da177e4 LT |
1783 | } |
1784 | ||
1785 | module_init(dasd_eckd_init); | |
1786 | module_exit(dasd_eckd_cleanup); |