Commit | Line | Data |
---|---|---|
138c014d | 1 | /* |
1da177e4 LT |
2 | * File...........: linux/drivers/s390/block/dasd_eckd.c |
3 | * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> | |
138c014d | 4 | * Horst Hummel <Horst.Hummel@de.ibm.com> |
1da177e4 LT |
5 | * Carsten Otte <Cotte@de.ibm.com> |
6 | * Martin Schwidefsky <schwidefsky@de.ibm.com> | |
7 | * Bugreports.to..: <Linux390@de.ibm.com> | |
8 | * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000 | |
9 | * | |
1da177e4 LT |
10 | */ |
11 | ||
1da177e4 LT |
12 | #include <linux/stddef.h> |
13 | #include <linux/kernel.h> | |
14 | #include <linux/slab.h> | |
15 | #include <linux/hdreg.h> /* HDIO_GETGEO */ | |
16 | #include <linux/bio.h> | |
17 | #include <linux/module.h> | |
18 | #include <linux/init.h> | |
19 | ||
20 | #include <asm/debug.h> | |
21 | #include <asm/idals.h> | |
22 | #include <asm/ebcdic.h> | |
23 | #include <asm/io.h> | |
24 | #include <asm/todclk.h> | |
25 | #include <asm/uaccess.h> | |
40545573 | 26 | #include <asm/cio.h> |
1da177e4 LT |
27 | #include <asm/ccwdev.h> |
28 | ||
29 | #include "dasd_int.h" | |
30 | #include "dasd_eckd.h" | |
31 | ||
32 | #ifdef PRINTK_HEADER | |
33 | #undef PRINTK_HEADER | |
34 | #endif /* PRINTK_HEADER */ | |
35 | #define PRINTK_HEADER "dasd(eckd):" | |
36 | ||
37 | #define ECKD_C0(i) (i->home_bytes) | |
38 | #define ECKD_F(i) (i->formula) | |
39 | #define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\ | |
40 | (i->factors.f_0x02.f1)) | |
41 | #define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\ | |
42 | (i->factors.f_0x02.f2)) | |
43 | #define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\ | |
44 | (i->factors.f_0x02.f3)) | |
45 | #define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0) | |
46 | #define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0) | |
47 | #define ECKD_F6(i) (i->factor6) | |
48 | #define ECKD_F7(i) (i->factor7) | |
49 | #define ECKD_F8(i) (i->factor8) | |
50 | ||
51 | MODULE_LICENSE("GPL"); | |
52 | ||
53 | static struct dasd_discipline dasd_eckd_discipline; | |
54 | ||
1da177e4 LT |
55 | /* The ccw bus type uses this table to find devices that it sends to |
56 | * dasd_eckd_probe */ | |
57 | static struct ccw_device_id dasd_eckd_ids[] = { | |
d2c993d8 HC |
58 | { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1}, |
59 | { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2}, | |
60 | { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3390, 0), .driver_info = 0x3}, | |
61 | { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4}, | |
62 | { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5}, | |
63 | { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6}, | |
64 | { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7}, | |
65 | { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8}, | |
66 | { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9}, | |
67 | { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa}, | |
1da177e4 LT |
68 | { /* end of list */ }, |
69 | }; | |
70 | ||
71 | MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids); | |
72 | ||
73 | static struct ccw_driver dasd_eckd_driver; /* see below */ | |
74 | ||
75 | /* initial attempt at a probe function. this can be simplified once | |
76 | * the other detection code is gone */ | |
77 | static int | |
78 | dasd_eckd_probe (struct ccw_device *cdev) | |
79 | { | |
80 | int ret; | |
81 | ||
40545573 HH |
82 | /* set ECKD specific ccw-device options */ |
83 | ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE); | |
84 | if (ret) { | |
85 | printk(KERN_WARNING | |
86 | "dasd_eckd_probe: could not set ccw-device options " | |
2a0217d5 | 87 | "for %s\n", dev_name(&cdev->dev)); |
1da177e4 | 88 | return ret; |
40545573 HH |
89 | } |
90 | ret = dasd_generic_probe(cdev, &dasd_eckd_discipline); | |
91 | return ret; | |
1da177e4 LT |
92 | } |
93 | ||
94 | static int | |
95 | dasd_eckd_set_online(struct ccw_device *cdev) | |
96 | { | |
40545573 | 97 | return dasd_generic_set_online(cdev, &dasd_eckd_discipline); |
1da177e4 LT |
98 | } |
99 | ||
100 | static struct ccw_driver dasd_eckd_driver = { | |
101 | .name = "dasd-eckd", | |
102 | .owner = THIS_MODULE, | |
103 | .ids = dasd_eckd_ids, | |
104 | .probe = dasd_eckd_probe, | |
105 | .remove = dasd_generic_remove, | |
106 | .set_offline = dasd_generic_set_offline, | |
107 | .set_online = dasd_eckd_set_online, | |
108 | .notify = dasd_generic_notify, | |
109 | }; | |
110 | ||
111 | static const int sizes_trk0[] = { 28, 148, 84 }; | |
112 | #define LABEL_SIZE 140 | |
113 | ||
114 | static inline unsigned int | |
115 | round_up_multiple(unsigned int no, unsigned int mult) | |
116 | { | |
117 | int rem = no % mult; | |
118 | return (rem ? no - rem + mult : no); | |
119 | } | |
120 | ||
121 | static inline unsigned int | |
122 | ceil_quot(unsigned int d1, unsigned int d2) | |
123 | { | |
124 | return (d1 + (d2 - 1)) / d2; | |
125 | } | |
126 | ||
4d284cac | 127 | static unsigned int |
1da177e4 LT |
128 | recs_per_track(struct dasd_eckd_characteristics * rdc, |
129 | unsigned int kl, unsigned int dl) | |
130 | { | |
131 | int dn, kn; | |
132 | ||
133 | switch (rdc->dev_type) { | |
134 | case 0x3380: | |
135 | if (kl) | |
136 | return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + | |
137 | ceil_quot(dl + 12, 32)); | |
138 | else | |
139 | return 1499 / (15 + ceil_quot(dl + 12, 32)); | |
140 | case 0x3390: | |
141 | dn = ceil_quot(dl + 6, 232) + 1; | |
142 | if (kl) { | |
143 | kn = ceil_quot(kl + 6, 232) + 1; | |
144 | return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + | |
145 | 9 + ceil_quot(dl + 6 * dn, 34)); | |
146 | } else | |
147 | return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); | |
148 | case 0x9345: | |
149 | dn = ceil_quot(dl + 6, 232) + 1; | |
150 | if (kl) { | |
151 | kn = ceil_quot(kl + 6, 232) + 1; | |
152 | return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + | |
153 | ceil_quot(dl + 6 * dn, 34)); | |
154 | } else | |
155 | return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); | |
156 | } | |
157 | return 0; | |
158 | } | |
159 | ||
4d284cac | 160 | static int |
1da177e4 LT |
161 | check_XRC (struct ccw1 *de_ccw, |
162 | struct DE_eckd_data *data, | |
163 | struct dasd_device *device) | |
164 | { | |
165 | struct dasd_eckd_private *private; | |
d54853ef | 166 | int rc; |
1da177e4 LT |
167 | |
168 | private = (struct dasd_eckd_private *) device->private; | |
d54853ef MS |
169 | if (!private->rdc_data.facilities.XRC_supported) |
170 | return 0; | |
1da177e4 LT |
171 | |
172 | /* switch on System Time Stamp - needed for XRC Support */ | |
d54853ef MS |
173 | data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ |
174 | data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ | |
1da177e4 | 175 | |
d54853ef MS |
176 | rc = get_sync_clock(&data->ep_sys_time); |
177 | /* Ignore return code if sync clock is switched off. */ | |
178 | if (rc == -ENOSYS || rc == -EACCES) | |
179 | rc = 0; | |
1da177e4 | 180 | |
8e09f215 | 181 | de_ccw->count = sizeof(struct DE_eckd_data); |
d54853ef MS |
182 | de_ccw->flags |= CCW_FLAG_SLI; |
183 | return rc; | |
184 | } | |
1da177e4 | 185 | |
4d284cac | 186 | static int |
1da177e4 LT |
187 | define_extent(struct ccw1 * ccw, struct DE_eckd_data * data, int trk, |
188 | int totrk, int cmd, struct dasd_device * device) | |
189 | { | |
190 | struct dasd_eckd_private *private; | |
191 | struct ch_t geo, beg, end; | |
d54853ef | 192 | int rc = 0; |
1da177e4 LT |
193 | |
194 | private = (struct dasd_eckd_private *) device->private; | |
195 | ||
196 | ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; | |
197 | ccw->flags = 0; | |
198 | ccw->count = 16; | |
199 | ccw->cda = (__u32) __pa(data); | |
200 | ||
8e09f215 | 201 | memset(data, 0, sizeof(struct DE_eckd_data)); |
1da177e4 LT |
202 | switch (cmd) { |
203 | case DASD_ECKD_CCW_READ_HOME_ADDRESS: | |
204 | case DASD_ECKD_CCW_READ_RECORD_ZERO: | |
205 | case DASD_ECKD_CCW_READ: | |
206 | case DASD_ECKD_CCW_READ_MT: | |
207 | case DASD_ECKD_CCW_READ_CKD: | |
208 | case DASD_ECKD_CCW_READ_CKD_MT: | |
209 | case DASD_ECKD_CCW_READ_KD: | |
210 | case DASD_ECKD_CCW_READ_KD_MT: | |
211 | case DASD_ECKD_CCW_READ_COUNT: | |
212 | data->mask.perm = 0x1; | |
213 | data->attributes.operation = private->attrib.operation; | |
214 | break; | |
215 | case DASD_ECKD_CCW_WRITE: | |
216 | case DASD_ECKD_CCW_WRITE_MT: | |
217 | case DASD_ECKD_CCW_WRITE_KD: | |
218 | case DASD_ECKD_CCW_WRITE_KD_MT: | |
219 | data->mask.perm = 0x02; | |
220 | data->attributes.operation = private->attrib.operation; | |
d54853ef | 221 | rc = check_XRC (ccw, data, device); |
1da177e4 LT |
222 | break; |
223 | case DASD_ECKD_CCW_WRITE_CKD: | |
224 | case DASD_ECKD_CCW_WRITE_CKD_MT: | |
225 | data->attributes.operation = DASD_BYPASS_CACHE; | |
d54853ef | 226 | rc = check_XRC (ccw, data, device); |
1da177e4 LT |
227 | break; |
228 | case DASD_ECKD_CCW_ERASE: | |
229 | case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: | |
230 | case DASD_ECKD_CCW_WRITE_RECORD_ZERO: | |
231 | data->mask.perm = 0x3; | |
232 | data->mask.auth = 0x1; | |
233 | data->attributes.operation = DASD_BYPASS_CACHE; | |
d54853ef | 234 | rc = check_XRC (ccw, data, device); |
1da177e4 LT |
235 | break; |
236 | default: | |
237 | DEV_MESSAGE(KERN_ERR, device, "unknown opcode 0x%x", cmd); | |
238 | break; | |
239 | } | |
240 | ||
241 | data->attributes.mode = 0x3; /* ECKD */ | |
242 | ||
243 | if ((private->rdc_data.cu_type == 0x2105 || | |
244 | private->rdc_data.cu_type == 0x2107 || | |
245 | private->rdc_data.cu_type == 0x1750) | |
246 | && !(private->uses_cdl && trk < 2)) | |
247 | data->ga_extended |= 0x40; /* Regular Data Format Mode */ | |
248 | ||
249 | geo.cyl = private->rdc_data.no_cyl; | |
250 | geo.head = private->rdc_data.trk_per_cyl; | |
251 | beg.cyl = trk / geo.head; | |
252 | beg.head = trk % geo.head; | |
253 | end.cyl = totrk / geo.head; | |
254 | end.head = totrk % geo.head; | |
255 | ||
256 | /* check for sequential prestage - enhance cylinder range */ | |
257 | if (data->attributes.operation == DASD_SEQ_PRESTAGE || | |
258 | data->attributes.operation == DASD_SEQ_ACCESS) { | |
138c014d HH |
259 | |
260 | if (end.cyl + private->attrib.nr_cyl < geo.cyl) | |
1da177e4 LT |
261 | end.cyl += private->attrib.nr_cyl; |
262 | else | |
263 | end.cyl = (geo.cyl - 1); | |
264 | } | |
265 | ||
266 | data->beg_ext.cyl = beg.cyl; | |
267 | data->beg_ext.head = beg.head; | |
268 | data->end_ext.cyl = end.cyl; | |
269 | data->end_ext.head = end.head; | |
d54853ef | 270 | return rc; |
1da177e4 LT |
271 | } |
272 | ||
8e09f215 SW |
273 | static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata, |
274 | struct dasd_device *device) | |
275 | { | |
276 | struct dasd_eckd_private *private; | |
277 | int rc; | |
278 | ||
279 | private = (struct dasd_eckd_private *) device->private; | |
280 | if (!private->rdc_data.facilities.XRC_supported) | |
281 | return 0; | |
282 | ||
283 | /* switch on System Time Stamp - needed for XRC Support */ | |
284 | pfxdata->define_extend.ga_extended |= 0x08; /* 'Time Stamp Valid' */ | |
285 | pfxdata->define_extend.ga_extended |= 0x02; /* 'Extended Parameter' */ | |
286 | pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ | |
287 | ||
288 | rc = get_sync_clock(&pfxdata->define_extend.ep_sys_time); | |
289 | /* Ignore return code if sync clock is switched off. */ | |
290 | if (rc == -ENOSYS || rc == -EACCES) | |
291 | rc = 0; | |
292 | return rc; | |
293 | } | |
294 | ||
295 | static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, int trk, | |
296 | int totrk, int cmd, struct dasd_device *basedev, | |
297 | struct dasd_device *startdev) | |
298 | { | |
299 | struct dasd_eckd_private *basepriv, *startpriv; | |
300 | struct DE_eckd_data *data; | |
301 | struct ch_t geo, beg, end; | |
302 | int rc = 0; | |
303 | ||
304 | basepriv = (struct dasd_eckd_private *) basedev->private; | |
305 | startpriv = (struct dasd_eckd_private *) startdev->private; | |
306 | data = &pfxdata->define_extend; | |
307 | ||
308 | ccw->cmd_code = DASD_ECKD_CCW_PFX; | |
309 | ccw->flags = 0; | |
310 | ccw->count = sizeof(*pfxdata); | |
311 | ccw->cda = (__u32) __pa(pfxdata); | |
312 | ||
313 | memset(pfxdata, 0, sizeof(*pfxdata)); | |
314 | /* prefix data */ | |
315 | pfxdata->format = 0; | |
4abb08c2 SW |
316 | pfxdata->base_address = basepriv->ned->unit_addr; |
317 | pfxdata->base_lss = basepriv->ned->ID; | |
8e09f215 SW |
318 | pfxdata->validity.define_extend = 1; |
319 | ||
320 | /* private uid is kept up to date, conf_data may be outdated */ | |
321 | if (startpriv->uid.type != UA_BASE_DEVICE) { | |
322 | pfxdata->validity.verify_base = 1; | |
323 | if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) | |
324 | pfxdata->validity.hyper_pav = 1; | |
325 | } | |
326 | ||
327 | /* define extend data (mostly)*/ | |
328 | switch (cmd) { | |
329 | case DASD_ECKD_CCW_READ_HOME_ADDRESS: | |
330 | case DASD_ECKD_CCW_READ_RECORD_ZERO: | |
331 | case DASD_ECKD_CCW_READ: | |
332 | case DASD_ECKD_CCW_READ_MT: | |
333 | case DASD_ECKD_CCW_READ_CKD: | |
334 | case DASD_ECKD_CCW_READ_CKD_MT: | |
335 | case DASD_ECKD_CCW_READ_KD: | |
336 | case DASD_ECKD_CCW_READ_KD_MT: | |
337 | case DASD_ECKD_CCW_READ_COUNT: | |
338 | data->mask.perm = 0x1; | |
339 | data->attributes.operation = basepriv->attrib.operation; | |
340 | break; | |
341 | case DASD_ECKD_CCW_WRITE: | |
342 | case DASD_ECKD_CCW_WRITE_MT: | |
343 | case DASD_ECKD_CCW_WRITE_KD: | |
344 | case DASD_ECKD_CCW_WRITE_KD_MT: | |
345 | data->mask.perm = 0x02; | |
346 | data->attributes.operation = basepriv->attrib.operation; | |
347 | rc = check_XRC_on_prefix(pfxdata, basedev); | |
348 | break; | |
349 | case DASD_ECKD_CCW_WRITE_CKD: | |
350 | case DASD_ECKD_CCW_WRITE_CKD_MT: | |
351 | data->attributes.operation = DASD_BYPASS_CACHE; | |
352 | rc = check_XRC_on_prefix(pfxdata, basedev); | |
353 | break; | |
354 | case DASD_ECKD_CCW_ERASE: | |
355 | case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: | |
356 | case DASD_ECKD_CCW_WRITE_RECORD_ZERO: | |
357 | data->mask.perm = 0x3; | |
358 | data->mask.auth = 0x1; | |
359 | data->attributes.operation = DASD_BYPASS_CACHE; | |
360 | rc = check_XRC_on_prefix(pfxdata, basedev); | |
361 | break; | |
362 | default: | |
363 | DEV_MESSAGE(KERN_ERR, basedev, "unknown opcode 0x%x", cmd); | |
364 | break; | |
365 | } | |
366 | ||
367 | data->attributes.mode = 0x3; /* ECKD */ | |
368 | ||
369 | if ((basepriv->rdc_data.cu_type == 0x2105 || | |
370 | basepriv->rdc_data.cu_type == 0x2107 || | |
371 | basepriv->rdc_data.cu_type == 0x1750) | |
372 | && !(basepriv->uses_cdl && trk < 2)) | |
373 | data->ga_extended |= 0x40; /* Regular Data Format Mode */ | |
374 | ||
375 | geo.cyl = basepriv->rdc_data.no_cyl; | |
376 | geo.head = basepriv->rdc_data.trk_per_cyl; | |
377 | beg.cyl = trk / geo.head; | |
378 | beg.head = trk % geo.head; | |
379 | end.cyl = totrk / geo.head; | |
380 | end.head = totrk % geo.head; | |
381 | ||
382 | /* check for sequential prestage - enhance cylinder range */ | |
383 | if (data->attributes.operation == DASD_SEQ_PRESTAGE || | |
384 | data->attributes.operation == DASD_SEQ_ACCESS) { | |
385 | ||
386 | if (end.cyl + basepriv->attrib.nr_cyl < geo.cyl) | |
387 | end.cyl += basepriv->attrib.nr_cyl; | |
388 | else | |
389 | end.cyl = (geo.cyl - 1); | |
390 | } | |
391 | ||
392 | data->beg_ext.cyl = beg.cyl; | |
393 | data->beg_ext.head = beg.head; | |
394 | data->end_ext.cyl = end.cyl; | |
395 | data->end_ext.head = end.head; | |
396 | return rc; | |
397 | } | |
398 | ||
4d284cac | 399 | static void |
1da177e4 LT |
400 | locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, int trk, |
401 | int rec_on_trk, int no_rec, int cmd, | |
402 | struct dasd_device * device, int reclen) | |
403 | { | |
404 | struct dasd_eckd_private *private; | |
405 | int sector; | |
406 | int dn, d; | |
138c014d | 407 | |
1da177e4 LT |
408 | private = (struct dasd_eckd_private *) device->private; |
409 | ||
410 | DBF_DEV_EVENT(DBF_INFO, device, | |
411 | "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", | |
412 | trk, rec_on_trk, no_rec, cmd, reclen); | |
413 | ||
414 | ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; | |
415 | ccw->flags = 0; | |
416 | ccw->count = 16; | |
417 | ccw->cda = (__u32) __pa(data); | |
418 | ||
8e09f215 | 419 | memset(data, 0, sizeof(struct LO_eckd_data)); |
1da177e4 LT |
420 | sector = 0; |
421 | if (rec_on_trk) { | |
422 | switch (private->rdc_data.dev_type) { | |
423 | case 0x3390: | |
424 | dn = ceil_quot(reclen + 6, 232); | |
425 | d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); | |
426 | sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; | |
427 | break; | |
428 | case 0x3380: | |
429 | d = 7 + ceil_quot(reclen + 12, 32); | |
430 | sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; | |
431 | break; | |
432 | } | |
433 | } | |
434 | data->sector = sector; | |
435 | data->count = no_rec; | |
436 | switch (cmd) { | |
437 | case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: | |
438 | data->operation.orientation = 0x3; | |
439 | data->operation.operation = 0x03; | |
440 | break; | |
441 | case DASD_ECKD_CCW_READ_HOME_ADDRESS: | |
442 | data->operation.orientation = 0x3; | |
443 | data->operation.operation = 0x16; | |
444 | break; | |
445 | case DASD_ECKD_CCW_WRITE_RECORD_ZERO: | |
446 | data->operation.orientation = 0x1; | |
447 | data->operation.operation = 0x03; | |
448 | data->count++; | |
449 | break; | |
450 | case DASD_ECKD_CCW_READ_RECORD_ZERO: | |
451 | data->operation.orientation = 0x3; | |
452 | data->operation.operation = 0x16; | |
453 | data->count++; | |
454 | break; | |
455 | case DASD_ECKD_CCW_WRITE: | |
456 | case DASD_ECKD_CCW_WRITE_MT: | |
457 | case DASD_ECKD_CCW_WRITE_KD: | |
458 | case DASD_ECKD_CCW_WRITE_KD_MT: | |
459 | data->auxiliary.last_bytes_used = 0x1; | |
460 | data->length = reclen; | |
461 | data->operation.operation = 0x01; | |
462 | break; | |
463 | case DASD_ECKD_CCW_WRITE_CKD: | |
464 | case DASD_ECKD_CCW_WRITE_CKD_MT: | |
465 | data->auxiliary.last_bytes_used = 0x1; | |
466 | data->length = reclen; | |
467 | data->operation.operation = 0x03; | |
468 | break; | |
469 | case DASD_ECKD_CCW_READ: | |
470 | case DASD_ECKD_CCW_READ_MT: | |
471 | case DASD_ECKD_CCW_READ_KD: | |
472 | case DASD_ECKD_CCW_READ_KD_MT: | |
473 | data->auxiliary.last_bytes_used = 0x1; | |
474 | data->length = reclen; | |
475 | data->operation.operation = 0x06; | |
476 | break; | |
477 | case DASD_ECKD_CCW_READ_CKD: | |
478 | case DASD_ECKD_CCW_READ_CKD_MT: | |
479 | data->auxiliary.last_bytes_used = 0x1; | |
480 | data->length = reclen; | |
481 | data->operation.operation = 0x16; | |
482 | break; | |
483 | case DASD_ECKD_CCW_READ_COUNT: | |
484 | data->operation.operation = 0x06; | |
485 | break; | |
486 | case DASD_ECKD_CCW_ERASE: | |
487 | data->length = reclen; | |
488 | data->auxiliary.last_bytes_used = 0x1; | |
489 | data->operation.operation = 0x0b; | |
490 | break; | |
491 | default: | |
492 | DEV_MESSAGE(KERN_ERR, device, "unknown opcode 0x%x", cmd); | |
493 | } | |
494 | data->seek_addr.cyl = data->search_arg.cyl = | |
495 | trk / private->rdc_data.trk_per_cyl; | |
496 | data->seek_addr.head = data->search_arg.head = | |
497 | trk % private->rdc_data.trk_per_cyl; | |
498 | data->search_arg.record = rec_on_trk; | |
499 | } | |
500 | ||
501 | /* | |
502 | * Returns 1 if the block is one of the special blocks that needs | |
503 | * to get read/written with the KD variant of the command. | |
504 | * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and | |
505 | * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. | |
506 | * Luckily the KD variants differ only by one bit (0x08) from the | |
507 | * normal variant. So don't wonder about code like: | |
508 | * if (dasd_eckd_cdl_special(blk_per_trk, recid)) | |
509 | * ccw->cmd_code |= 0x8; | |
510 | */ | |
511 | static inline int | |
512 | dasd_eckd_cdl_special(int blk_per_trk, int recid) | |
513 | { | |
514 | if (recid < 3) | |
515 | return 1; | |
516 | if (recid < blk_per_trk) | |
517 | return 0; | |
518 | if (recid < 2 * blk_per_trk) | |
519 | return 1; | |
520 | return 0; | |
521 | } | |
522 | ||
523 | /* | |
524 | * Returns the record size for the special blocks of the cdl format. | |
525 | * Only returns something useful if dasd_eckd_cdl_special is true | |
526 | * for the recid. | |
527 | */ | |
528 | static inline int | |
529 | dasd_eckd_cdl_reclen(int recid) | |
530 | { | |
531 | if (recid < 3) | |
532 | return sizes_trk0[recid]; | |
533 | return LABEL_SIZE; | |
534 | } | |
535 | ||
3d052595 HH |
536 | /* |
537 | * Generate device unique id that specifies the physical device. | |
538 | */ | |
4abb08c2 SW |
539 | static int dasd_eckd_generate_uid(struct dasd_device *device, |
540 | struct dasd_uid *uid) | |
3d052595 HH |
541 | { |
542 | struct dasd_eckd_private *private; | |
4abb08c2 | 543 | int count; |
3d052595 HH |
544 | |
545 | private = (struct dasd_eckd_private *) device->private; | |
546 | if (!private) | |
547 | return -ENODEV; | |
4abb08c2 | 548 | if (!private->ned || !private->gneq) |
3d052595 HH |
549 | return -ENODEV; |
550 | ||
551 | memset(uid, 0, sizeof(struct dasd_uid)); | |
4abb08c2 | 552 | memcpy(uid->vendor, private->ned->HDA_manufacturer, |
d0710c7c | 553 | sizeof(uid->vendor) - 1); |
3d052595 | 554 | EBCASC(uid->vendor, sizeof(uid->vendor) - 1); |
4abb08c2 | 555 | memcpy(uid->serial, private->ned->HDA_location, |
d0710c7c | 556 | sizeof(uid->serial) - 1); |
3d052595 | 557 | EBCASC(uid->serial, sizeof(uid->serial) - 1); |
4abb08c2 SW |
558 | uid->ssid = private->gneq->subsystemID; |
559 | uid->real_unit_addr = private->ned->unit_addr;; | |
560 | if (private->sneq) { | |
561 | uid->type = private->sneq->sua_flags; | |
8e09f215 | 562 | if (uid->type == UA_BASE_PAV_ALIAS) |
4abb08c2 | 563 | uid->base_unit_addr = private->sneq->base_unit_addr; |
8e09f215 SW |
564 | } else { |
565 | uid->type = UA_BASE_DEVICE; | |
566 | } | |
4abb08c2 SW |
567 | if (private->vdsneq) { |
568 | for (count = 0; count < 16; count++) { | |
569 | sprintf(uid->vduit+2*count, "%02x", | |
570 | private->vdsneq->uit[count]); | |
571 | } | |
572 | } | |
3d052595 HH |
573 | return 0; |
574 | } | |
575 | ||
763968e2 HC |
576 | static struct dasd_ccw_req *dasd_eckd_build_rcd_lpm(struct dasd_device *device, |
577 | void *rcd_buffer, | |
578 | struct ciw *ciw, __u8 lpm) | |
17283b56 CH |
579 | { |
580 | struct dasd_ccw_req *cqr; | |
581 | struct ccw1 *ccw; | |
582 | ||
583 | cqr = dasd_smalloc_request("ECKD", 1 /* RCD */, ciw->count, device); | |
584 | ||
585 | if (IS_ERR(cqr)) { | |
586 | DEV_MESSAGE(KERN_WARNING, device, "%s", | |
587 | "Could not allocate RCD request"); | |
588 | return cqr; | |
589 | } | |
590 | ||
591 | ccw = cqr->cpaddr; | |
592 | ccw->cmd_code = ciw->cmd; | |
593 | ccw->cda = (__u32)(addr_t)rcd_buffer; | |
594 | ccw->count = ciw->count; | |
595 | ||
8e09f215 SW |
596 | cqr->startdev = device; |
597 | cqr->memdev = device; | |
598 | cqr->block = NULL; | |
17283b56 CH |
599 | cqr->expires = 10*HZ; |
600 | cqr->lpm = lpm; | |
601 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); | |
602 | cqr->retries = 2; | |
603 | cqr->buildclk = get_clock(); | |
604 | cqr->status = DASD_CQR_FILLED; | |
605 | return cqr; | |
606 | } | |
607 | ||
608 | static int dasd_eckd_read_conf_lpm(struct dasd_device *device, | |
609 | void **rcd_buffer, | |
610 | int *rcd_buffer_size, __u8 lpm) | |
611 | { | |
612 | struct ciw *ciw; | |
613 | char *rcd_buf = NULL; | |
614 | int ret; | |
615 | struct dasd_ccw_req *cqr; | |
616 | ||
617 | /* | |
618 | * scan for RCD command in extended SenseID data | |
619 | */ | |
620 | ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); | |
621 | if (!ciw || ciw->cmd == 0) { | |
622 | ret = -EOPNOTSUPP; | |
623 | goto out_error; | |
624 | } | |
625 | rcd_buf = kzalloc(ciw->count, GFP_KERNEL | GFP_DMA); | |
626 | if (!rcd_buf) { | |
627 | ret = -ENOMEM; | |
628 | goto out_error; | |
629 | } | |
4abb08c2 SW |
630 | |
631 | /* | |
632 | * buffer has to start with EBCDIC "V1.0" to show | |
633 | * support for virtual device SNEQ | |
634 | */ | |
635 | rcd_buf[0] = 0xE5; | |
636 | rcd_buf[1] = 0xF1; | |
637 | rcd_buf[2] = 0x4B; | |
638 | rcd_buf[3] = 0xF0; | |
17283b56 CH |
639 | cqr = dasd_eckd_build_rcd_lpm(device, rcd_buf, ciw, lpm); |
640 | if (IS_ERR(cqr)) { | |
641 | ret = PTR_ERR(cqr); | |
642 | goto out_error; | |
643 | } | |
644 | ret = dasd_sleep_on(cqr); | |
645 | /* | |
646 | * on success we update the user input parms | |
647 | */ | |
8e09f215 | 648 | dasd_sfree_request(cqr, cqr->memdev); |
17283b56 CH |
649 | if (ret) |
650 | goto out_error; | |
651 | ||
652 | *rcd_buffer_size = ciw->count; | |
653 | *rcd_buffer = rcd_buf; | |
654 | return 0; | |
655 | out_error: | |
656 | kfree(rcd_buf); | |
657 | *rcd_buffer = NULL; | |
658 | *rcd_buffer_size = 0; | |
659 | return ret; | |
660 | } | |
661 | ||
4abb08c2 SW |
662 | static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) |
663 | { | |
664 | ||
665 | struct dasd_sneq *sneq; | |
666 | int i, count; | |
667 | ||
668 | private->ned = NULL; | |
669 | private->sneq = NULL; | |
670 | private->vdsneq = NULL; | |
671 | private->gneq = NULL; | |
672 | count = private->conf_len / sizeof(struct dasd_sneq); | |
673 | sneq = (struct dasd_sneq *)private->conf_data; | |
674 | for (i = 0; i < count; ++i) { | |
675 | if (sneq->flags.identifier == 1 && sneq->format == 1) | |
676 | private->sneq = sneq; | |
677 | else if (sneq->flags.identifier == 1 && sneq->format == 4) | |
678 | private->vdsneq = (struct vd_sneq *)sneq; | |
679 | else if (sneq->flags.identifier == 2) | |
680 | private->gneq = (struct dasd_gneq *)sneq; | |
681 | else if (sneq->flags.identifier == 3 && sneq->res1 == 1) | |
682 | private->ned = (struct dasd_ned *)sneq; | |
683 | sneq++; | |
684 | } | |
685 | if (!private->ned || !private->gneq) { | |
686 | private->ned = NULL; | |
687 | private->sneq = NULL; | |
688 | private->vdsneq = NULL; | |
689 | private->gneq = NULL; | |
690 | return -EINVAL; | |
691 | } | |
692 | return 0; | |
693 | ||
694 | }; | |
695 | ||
696 | static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) | |
697 | { | |
698 | struct dasd_gneq *gneq; | |
699 | int i, count, found; | |
700 | ||
701 | count = conf_len / sizeof(*gneq); | |
702 | gneq = (struct dasd_gneq *)conf_data; | |
703 | found = 0; | |
704 | for (i = 0; i < count; ++i) { | |
705 | if (gneq->flags.identifier == 2) { | |
706 | found = 1; | |
707 | break; | |
708 | } | |
709 | gneq++; | |
710 | } | |
711 | if (found) | |
712 | return ((char *)gneq)[18] & 0x07; | |
713 | else | |
714 | return 0; | |
715 | } | |
716 | ||
717 | static int dasd_eckd_read_conf(struct dasd_device *device) | |
1da177e4 LT |
718 | { |
719 | void *conf_data; | |
720 | int conf_len, conf_data_saved; | |
721 | int rc; | |
722 | __u8 lpm; | |
723 | struct dasd_eckd_private *private; | |
724 | struct dasd_eckd_path *path_data; | |
725 | ||
726 | private = (struct dasd_eckd_private *) device->private; | |
727 | path_data = (struct dasd_eckd_path *) &private->path_data; | |
728 | path_data->opm = ccw_device_get_path_mask(device->cdev); | |
729 | lpm = 0x80; | |
730 | conf_data_saved = 0; | |
1da177e4 LT |
731 | /* get configuration data per operational path */ |
732 | for (lpm = 0x80; lpm; lpm>>= 1) { | |
733 | if (lpm & path_data->opm){ | |
17283b56 CH |
734 | rc = dasd_eckd_read_conf_lpm(device, &conf_data, |
735 | &conf_len, lpm); | |
1da177e4 LT |
736 | if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ |
737 | MESSAGE(KERN_WARNING, | |
738 | "Read configuration data returned " | |
739 | "error %d", rc); | |
740 | return rc; | |
741 | } | |
742 | if (conf_data == NULL) { | |
743 | MESSAGE(KERN_WARNING, "%s", "No configuration " | |
744 | "data retrieved"); | |
d133a960 | 745 | continue; /* no error */ |
1da177e4 | 746 | } |
1da177e4 | 747 | /* save first valid configuration data */ |
4abb08c2 SW |
748 | if (!conf_data_saved) { |
749 | kfree(private->conf_data); | |
750 | private->conf_data = conf_data; | |
751 | private->conf_len = conf_len; | |
752 | if (dasd_eckd_identify_conf_parts(private)) { | |
753 | private->conf_data = NULL; | |
754 | private->conf_len = 0; | |
755 | kfree(conf_data); | |
756 | continue; | |
757 | } | |
1da177e4 LT |
758 | conf_data_saved++; |
759 | } | |
4abb08c2 | 760 | switch (dasd_eckd_path_access(conf_data, conf_len)) { |
1da177e4 LT |
761 | case 0x02: |
762 | path_data->npm |= lpm; | |
763 | break; | |
764 | case 0x03: | |
765 | path_data->ppm |= lpm; | |
766 | break; | |
767 | } | |
4abb08c2 SW |
768 | if (conf_data != private->conf_data) |
769 | kfree(conf_data); | |
1da177e4 LT |
770 | } |
771 | } | |
772 | return 0; | |
773 | } | |
774 | ||
8e09f215 SW |
775 | static int dasd_eckd_read_features(struct dasd_device *device) |
776 | { | |
777 | struct dasd_psf_prssd_data *prssdp; | |
778 | struct dasd_rssd_features *features; | |
779 | struct dasd_ccw_req *cqr; | |
780 | struct ccw1 *ccw; | |
781 | int rc; | |
782 | struct dasd_eckd_private *private; | |
783 | ||
784 | private = (struct dasd_eckd_private *) device->private; | |
785 | cqr = dasd_smalloc_request(dasd_eckd_discipline.name, | |
786 | 1 /* PSF */ + 1 /* RSSD */ , | |
787 | (sizeof(struct dasd_psf_prssd_data) + | |
788 | sizeof(struct dasd_rssd_features)), | |
789 | device); | |
790 | if (IS_ERR(cqr)) { | |
791 | DEV_MESSAGE(KERN_WARNING, device, "%s", | |
792 | "Could not allocate initialization request"); | |
793 | return PTR_ERR(cqr); | |
794 | } | |
795 | cqr->startdev = device; | |
796 | cqr->memdev = device; | |
797 | cqr->block = NULL; | |
798 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); | |
799 | cqr->retries = 5; | |
800 | cqr->expires = 10 * HZ; | |
801 | ||
802 | /* Prepare for Read Subsystem Data */ | |
803 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
804 | memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); | |
805 | prssdp->order = PSF_ORDER_PRSSD; | |
806 | prssdp->suborder = 0x41; /* Read Feature Codes */ | |
807 | /* all other bytes of prssdp must be zero */ | |
808 | ||
809 | ccw = cqr->cpaddr; | |
810 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
811 | ccw->count = sizeof(struct dasd_psf_prssd_data); | |
812 | ccw->flags |= CCW_FLAG_CC; | |
813 | ccw->cda = (__u32)(addr_t) prssdp; | |
814 | ||
815 | /* Read Subsystem Data - feature codes */ | |
816 | features = (struct dasd_rssd_features *) (prssdp + 1); | |
817 | memset(features, 0, sizeof(struct dasd_rssd_features)); | |
818 | ||
819 | ccw++; | |
820 | ccw->cmd_code = DASD_ECKD_CCW_RSSD; | |
821 | ccw->count = sizeof(struct dasd_rssd_features); | |
822 | ccw->cda = (__u32)(addr_t) features; | |
823 | ||
824 | cqr->buildclk = get_clock(); | |
825 | cqr->status = DASD_CQR_FILLED; | |
826 | rc = dasd_sleep_on(cqr); | |
827 | if (rc == 0) { | |
828 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
829 | features = (struct dasd_rssd_features *) (prssdp + 1); | |
830 | memcpy(&private->features, features, | |
831 | sizeof(struct dasd_rssd_features)); | |
832 | } | |
833 | dasd_sfree_request(cqr, cqr->memdev); | |
834 | return rc; | |
835 | } | |
836 | ||
837 | ||
40545573 HH |
838 | /* |
839 | * Build CP for Perform Subsystem Function - SSC. | |
840 | */ | |
8e09f215 | 841 | static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device) |
40545573 | 842 | { |
8e09f215 SW |
843 | struct dasd_ccw_req *cqr; |
844 | struct dasd_psf_ssc_data *psf_ssc_data; | |
845 | struct ccw1 *ccw; | |
40545573 | 846 | |
8e09f215 | 847 | cqr = dasd_smalloc_request("ECKD", 1 /* PSF */ , |
40545573 HH |
848 | sizeof(struct dasd_psf_ssc_data), |
849 | device); | |
850 | ||
8e09f215 SW |
851 | if (IS_ERR(cqr)) { |
852 | DEV_MESSAGE(KERN_WARNING, device, "%s", | |
40545573 | 853 | "Could not allocate PSF-SSC request"); |
8e09f215 SW |
854 | return cqr; |
855 | } | |
856 | psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; | |
857 | psf_ssc_data->order = PSF_ORDER_SSC; | |
858 | psf_ssc_data->suborder = 0x88; | |
859 | psf_ssc_data->reserved[0] = 0x88; | |
860 | ||
861 | ccw = cqr->cpaddr; | |
862 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
863 | ccw->cda = (__u32)(addr_t)psf_ssc_data; | |
864 | ccw->count = 66; | |
865 | ||
866 | cqr->startdev = device; | |
867 | cqr->memdev = device; | |
868 | cqr->block = NULL; | |
869 | cqr->expires = 10*HZ; | |
870 | cqr->buildclk = get_clock(); | |
871 | cqr->status = DASD_CQR_FILLED; | |
872 | return cqr; | |
40545573 HH |
873 | } |
874 | ||
875 | /* | |
876 | * Perform Subsystem Function. | |
877 | * It is necessary to trigger CIO for channel revalidation since this | |
878 | * call might change behaviour of DASD devices. | |
879 | */ | |
880 | static int | |
881 | dasd_eckd_psf_ssc(struct dasd_device *device) | |
882 | { | |
8e09f215 SW |
883 | struct dasd_ccw_req *cqr; |
884 | int rc; | |
885 | ||
886 | cqr = dasd_eckd_build_psf_ssc(device); | |
887 | if (IS_ERR(cqr)) | |
888 | return PTR_ERR(cqr); | |
889 | ||
890 | rc = dasd_sleep_on(cqr); | |
891 | if (!rc) | |
892 | /* trigger CIO to reprobe devices */ | |
893 | css_schedule_reprobe(); | |
894 | dasd_sfree_request(cqr, cqr->memdev); | |
895 | return rc; | |
40545573 HH |
896 | } |
897 | ||
898 | /* | |
899 | * Valide storage server of current device. | |
900 | */ | |
8e09f215 | 901 | static int dasd_eckd_validate_server(struct dasd_device *device) |
40545573 HH |
902 | { |
903 | int rc; | |
8e09f215 | 904 | struct dasd_eckd_private *private; |
40545573 HH |
905 | |
906 | /* Currently PAV is the only reason to 'validate' server on LPAR */ | |
907 | if (dasd_nopav || MACHINE_IS_VM) | |
908 | return 0; | |
909 | ||
910 | rc = dasd_eckd_psf_ssc(device); | |
8e79a441 HH |
911 | /* may be requested feature is not available on server, |
912 | * therefore just report error and go ahead */ | |
8e09f215 | 913 | private = (struct dasd_eckd_private *) device->private; |
8e79a441 HH |
914 | DEV_MESSAGE(KERN_INFO, device, |
915 | "PSF-SSC on storage subsystem %s.%s.%04x returned rc=%d", | |
8e09f215 SW |
916 | private->uid.vendor, private->uid.serial, |
917 | private->uid.ssid, rc); | |
40545573 HH |
918 | /* RE-Read Configuration Data */ |
919 | return dasd_eckd_read_conf(device); | |
920 | } | |
921 | ||
3d052595 HH |
922 | /* |
923 | * Check device characteristics. | |
924 | * If the device is accessible using ECKD discipline, the device is enabled. | |
925 | */ | |
1da177e4 LT |
926 | static int |
927 | dasd_eckd_check_characteristics(struct dasd_device *device) | |
928 | { | |
929 | struct dasd_eckd_private *private; | |
8e09f215 | 930 | struct dasd_block *block; |
1da177e4 | 931 | void *rdc_data; |
8e09f215 | 932 | int is_known, rc; |
1da177e4 LT |
933 | |
934 | private = (struct dasd_eckd_private *) device->private; | |
935 | if (private == NULL) { | |
138c014d | 936 | private = kzalloc(sizeof(struct dasd_eckd_private), |
1da177e4 LT |
937 | GFP_KERNEL | GFP_DMA); |
938 | if (private == NULL) { | |
939 | DEV_MESSAGE(KERN_WARNING, device, "%s", | |
940 | "memory allocation failed for private " | |
941 | "data"); | |
942 | return -ENOMEM; | |
943 | } | |
1da177e4 LT |
944 | device->private = (void *) private; |
945 | } | |
946 | /* Invalidate status of initial analysis. */ | |
947 | private->init_cqr_status = -1; | |
948 | /* Set default cache operations. */ | |
949 | private->attrib.operation = DASD_NORMAL_CACHE; | |
950 | private->attrib.nr_cyl = 0; | |
951 | ||
40545573 HH |
952 | /* Read Configuration Data */ |
953 | rc = dasd_eckd_read_conf(device); | |
954 | if (rc) | |
8e09f215 | 955 | goto out_err1; |
40545573 HH |
956 | |
957 | /* Generate device unique id and register in devmap */ | |
8e09f215 | 958 | rc = dasd_eckd_generate_uid(device, &private->uid); |
40545573 | 959 | if (rc) |
8e09f215 SW |
960 | goto out_err1; |
961 | dasd_set_uid(device->cdev, &private->uid); | |
962 | ||
963 | if (private->uid.type == UA_BASE_DEVICE) { | |
964 | block = dasd_alloc_block(); | |
965 | if (IS_ERR(block)) { | |
966 | DEV_MESSAGE(KERN_WARNING, device, "%s", | |
967 | "could not allocate dasd block structure"); | |
968 | rc = PTR_ERR(block); | |
969 | goto out_err1; | |
970 | } | |
971 | device->block = block; | |
972 | block->base = device; | |
973 | } | |
974 | ||
975 | /* register lcu with alias handling, enable PAV if this is a new lcu */ | |
976 | is_known = dasd_alias_make_device_known_to_lcu(device); | |
977 | if (is_known < 0) { | |
978 | rc = is_known; | |
979 | goto out_err2; | |
980 | } | |
981 | if (!is_known) { | |
982 | /* new lcu found */ | |
983 | rc = dasd_eckd_validate_server(device); /* will switch pav on */ | |
984 | if (rc) | |
985 | goto out_err3; | |
986 | } | |
987 | ||
988 | /* Read Feature Codes */ | |
989 | rc = dasd_eckd_read_features(device); | |
40545573 | 990 | if (rc) |
8e09f215 | 991 | goto out_err3; |
40545573 | 992 | |
1da177e4 LT |
993 | /* Read Device Characteristics */ |
994 | rdc_data = (void *) &(private->rdc_data); | |
3d052595 | 995 | memset(rdc_data, 0, sizeof(rdc_data)); |
17283b56 | 996 | rc = dasd_generic_read_dev_chars(device, "ECKD", &rdc_data, 64); |
8e09f215 | 997 | if (rc) { |
1da177e4 | 998 | DEV_MESSAGE(KERN_WARNING, device, |
40545573 HH |
999 | "Read device characteristics returned " |
1000 | "rc=%d", rc); | |
8e09f215 SW |
1001 | goto out_err3; |
1002 | } | |
1da177e4 LT |
1003 | DEV_MESSAGE(KERN_INFO, device, |
1004 | "%04X/%02X(CU:%04X/%02X) Cyl:%d Head:%d Sec:%d", | |
1005 | private->rdc_data.dev_type, | |
1006 | private->rdc_data.dev_model, | |
1007 | private->rdc_data.cu_type, | |
1008 | private->rdc_data.cu_model.model, | |
1009 | private->rdc_data.no_cyl, | |
1010 | private->rdc_data.trk_per_cyl, | |
1011 | private->rdc_data.sec_per_trk); | |
8e09f215 SW |
1012 | return 0; |
1013 | ||
1014 | out_err3: | |
1015 | dasd_alias_disconnect_device_from_lcu(device); | |
1016 | out_err2: | |
1017 | dasd_free_block(device->block); | |
1018 | device->block = NULL; | |
1019 | out_err1: | |
4abb08c2 | 1020 | kfree(private->conf_data); |
8e09f215 SW |
1021 | kfree(device->private); |
1022 | device->private = NULL; | |
3d052595 | 1023 | return rc; |
1da177e4 LT |
1024 | } |
1025 | ||
8e09f215 SW |
1026 | static void dasd_eckd_uncheck_device(struct dasd_device *device) |
1027 | { | |
4abb08c2 SW |
1028 | struct dasd_eckd_private *private; |
1029 | ||
1030 | private = (struct dasd_eckd_private *) device->private; | |
8e09f215 | 1031 | dasd_alias_disconnect_device_from_lcu(device); |
4abb08c2 SW |
1032 | private->ned = NULL; |
1033 | private->sneq = NULL; | |
1034 | private->vdsneq = NULL; | |
1035 | private->gneq = NULL; | |
1036 | private->conf_len = 0; | |
1037 | kfree(private->conf_data); | |
1038 | private->conf_data = NULL; | |
8e09f215 SW |
1039 | } |
1040 | ||
1da177e4 LT |
1041 | static struct dasd_ccw_req * |
1042 | dasd_eckd_analysis_ccw(struct dasd_device *device) | |
1043 | { | |
1044 | struct dasd_eckd_private *private; | |
1045 | struct eckd_count *count_data; | |
1046 | struct LO_eckd_data *LO_data; | |
1047 | struct dasd_ccw_req *cqr; | |
1048 | struct ccw1 *ccw; | |
1049 | int cplength, datasize; | |
1050 | int i; | |
1051 | ||
1052 | private = (struct dasd_eckd_private *) device->private; | |
1053 | ||
1054 | cplength = 8; | |
1055 | datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); | |
1056 | cqr = dasd_smalloc_request(dasd_eckd_discipline.name, | |
1057 | cplength, datasize, device); | |
1058 | if (IS_ERR(cqr)) | |
1059 | return cqr; | |
1060 | ccw = cqr->cpaddr; | |
1061 | /* Define extent for the first 3 tracks. */ | |
1062 | define_extent(ccw++, cqr->data, 0, 2, | |
1063 | DASD_ECKD_CCW_READ_COUNT, device); | |
8e09f215 | 1064 | LO_data = cqr->data + sizeof(struct DE_eckd_data); |
1da177e4 LT |
1065 | /* Locate record for the first 4 records on track 0. */ |
1066 | ccw[-1].flags |= CCW_FLAG_CC; | |
1067 | locate_record(ccw++, LO_data++, 0, 0, 4, | |
1068 | DASD_ECKD_CCW_READ_COUNT, device, 0); | |
1069 | ||
1070 | count_data = private->count_area; | |
1071 | for (i = 0; i < 4; i++) { | |
1072 | ccw[-1].flags |= CCW_FLAG_CC; | |
1073 | ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; | |
1074 | ccw->flags = 0; | |
1075 | ccw->count = 8; | |
1076 | ccw->cda = (__u32)(addr_t) count_data; | |
1077 | ccw++; | |
1078 | count_data++; | |
1079 | } | |
1080 | ||
1081 | /* Locate record for the first record on track 2. */ | |
1082 | ccw[-1].flags |= CCW_FLAG_CC; | |
1083 | locate_record(ccw++, LO_data++, 2, 0, 1, | |
1084 | DASD_ECKD_CCW_READ_COUNT, device, 0); | |
1085 | /* Read count ccw. */ | |
1086 | ccw[-1].flags |= CCW_FLAG_CC; | |
1087 | ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; | |
1088 | ccw->flags = 0; | |
1089 | ccw->count = 8; | |
1090 | ccw->cda = (__u32)(addr_t) count_data; | |
1091 | ||
8e09f215 SW |
1092 | cqr->block = NULL; |
1093 | cqr->startdev = device; | |
1094 | cqr->memdev = device; | |
1da177e4 LT |
1095 | cqr->retries = 0; |
1096 | cqr->buildclk = get_clock(); | |
1097 | cqr->status = DASD_CQR_FILLED; | |
1098 | return cqr; | |
1099 | } | |
1100 | ||
1101 | /* | |
1102 | * This is the callback function for the init_analysis cqr. It saves | |
1103 | * the status of the initial analysis ccw before it frees it and kicks | |
1104 | * the device to continue the startup sequence. This will call | |
1105 | * dasd_eckd_do_analysis again (if the devices has not been marked | |
1106 | * for deletion in the meantime). | |
1107 | */ | |
1108 | static void | |
1109 | dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, void *data) | |
1110 | { | |
1111 | struct dasd_eckd_private *private; | |
1112 | struct dasd_device *device; | |
1113 | ||
8e09f215 | 1114 | device = init_cqr->startdev; |
1da177e4 LT |
1115 | private = (struct dasd_eckd_private *) device->private; |
1116 | private->init_cqr_status = init_cqr->status; | |
1117 | dasd_sfree_request(init_cqr, device); | |
1118 | dasd_kick_device(device); | |
1119 | } | |
1120 | ||
1121 | static int | |
8e09f215 | 1122 | dasd_eckd_start_analysis(struct dasd_block *block) |
1da177e4 LT |
1123 | { |
1124 | struct dasd_eckd_private *private; | |
1125 | struct dasd_ccw_req *init_cqr; | |
1126 | ||
8e09f215 SW |
1127 | private = (struct dasd_eckd_private *) block->base->private; |
1128 | init_cqr = dasd_eckd_analysis_ccw(block->base); | |
1da177e4 LT |
1129 | if (IS_ERR(init_cqr)) |
1130 | return PTR_ERR(init_cqr); | |
1131 | init_cqr->callback = dasd_eckd_analysis_callback; | |
1132 | init_cqr->callback_data = NULL; | |
1133 | init_cqr->expires = 5*HZ; | |
1134 | dasd_add_request_head(init_cqr); | |
1135 | return -EAGAIN; | |
1136 | } | |
1137 | ||
1138 | static int | |
8e09f215 | 1139 | dasd_eckd_end_analysis(struct dasd_block *block) |
1da177e4 | 1140 | { |
8e09f215 | 1141 | struct dasd_device *device; |
1da177e4 LT |
1142 | struct dasd_eckd_private *private; |
1143 | struct eckd_count *count_area; | |
1144 | unsigned int sb, blk_per_trk; | |
1145 | int status, i; | |
1146 | ||
8e09f215 | 1147 | device = block->base; |
1da177e4 LT |
1148 | private = (struct dasd_eckd_private *) device->private; |
1149 | status = private->init_cqr_status; | |
1150 | private->init_cqr_status = -1; | |
1151 | if (status != DASD_CQR_DONE) { | |
1152 | DEV_MESSAGE(KERN_WARNING, device, "%s", | |
1153 | "volume analysis returned unformatted disk"); | |
1154 | return -EMEDIUMTYPE; | |
1155 | } | |
1156 | ||
1157 | private->uses_cdl = 1; | |
1158 | /* Calculate number of blocks/records per track. */ | |
8e09f215 | 1159 | blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); |
1da177e4 LT |
1160 | /* Check Track 0 for Compatible Disk Layout */ |
1161 | count_area = NULL; | |
1162 | for (i = 0; i < 3; i++) { | |
1163 | if (private->count_area[i].kl != 4 || | |
1164 | private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) { | |
1165 | private->uses_cdl = 0; | |
1166 | break; | |
1167 | } | |
1168 | } | |
1169 | if (i == 3) | |
1170 | count_area = &private->count_area[4]; | |
1171 | ||
1172 | if (private->uses_cdl == 0) { | |
1173 | for (i = 0; i < 5; i++) { | |
1174 | if ((private->count_area[i].kl != 0) || | |
1175 | (private->count_area[i].dl != | |
1176 | private->count_area[0].dl)) | |
1177 | break; | |
1178 | } | |
1179 | if (i == 5) | |
1180 | count_area = &private->count_area[0]; | |
1181 | } else { | |
1182 | if (private->count_area[3].record == 1) | |
1183 | DEV_MESSAGE(KERN_WARNING, device, "%s", | |
1184 | "Trk 0: no records after VTOC!"); | |
1185 | } | |
1186 | if (count_area != NULL && count_area->kl == 0) { | |
1187 | /* we found notthing violating our disk layout */ | |
1188 | if (dasd_check_blocksize(count_area->dl) == 0) | |
8e09f215 | 1189 | block->bp_block = count_area->dl; |
1da177e4 | 1190 | } |
8e09f215 | 1191 | if (block->bp_block == 0) { |
1da177e4 LT |
1192 | DEV_MESSAGE(KERN_WARNING, device, "%s", |
1193 | "Volume has incompatible disk layout"); | |
1194 | return -EMEDIUMTYPE; | |
1195 | } | |
8e09f215 SW |
1196 | block->s2b_shift = 0; /* bits to shift 512 to get a block */ |
1197 | for (sb = 512; sb < block->bp_block; sb = sb << 1) | |
1198 | block->s2b_shift++; | |
1da177e4 | 1199 | |
8e09f215 SW |
1200 | blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); |
1201 | block->blocks = (private->rdc_data.no_cyl * | |
1da177e4 LT |
1202 | private->rdc_data.trk_per_cyl * |
1203 | blk_per_trk); | |
1204 | ||
1205 | DEV_MESSAGE(KERN_INFO, device, | |
1206 | "(%dkB blks): %dkB at %dkB/trk %s", | |
8e09f215 | 1207 | (block->bp_block >> 10), |
1da177e4 LT |
1208 | ((private->rdc_data.no_cyl * |
1209 | private->rdc_data.trk_per_cyl * | |
8e09f215 SW |
1210 | blk_per_trk * (block->bp_block >> 9)) >> 1), |
1211 | ((blk_per_trk * block->bp_block) >> 10), | |
1da177e4 LT |
1212 | private->uses_cdl ? |
1213 | "compatible disk layout" : "linux disk layout"); | |
1214 | ||
1215 | return 0; | |
1216 | } | |
1217 | ||
8e09f215 | 1218 | static int dasd_eckd_do_analysis(struct dasd_block *block) |
1da177e4 LT |
1219 | { |
1220 | struct dasd_eckd_private *private; | |
1221 | ||
8e09f215 | 1222 | private = (struct dasd_eckd_private *) block->base->private; |
1da177e4 | 1223 | if (private->init_cqr_status < 0) |
8e09f215 | 1224 | return dasd_eckd_start_analysis(block); |
1da177e4 | 1225 | else |
8e09f215 | 1226 | return dasd_eckd_end_analysis(block); |
1da177e4 LT |
1227 | } |
1228 | ||
8e09f215 SW |
1229 | static int dasd_eckd_ready_to_online(struct dasd_device *device) |
1230 | { | |
1231 | return dasd_alias_add_device(device); | |
1232 | }; | |
1233 | ||
1234 | static int dasd_eckd_online_to_ready(struct dasd_device *device) | |
1235 | { | |
1236 | return dasd_alias_remove_device(device); | |
1237 | }; | |
1238 | ||
1da177e4 | 1239 | static int |
8e09f215 | 1240 | dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) |
1da177e4 LT |
1241 | { |
1242 | struct dasd_eckd_private *private; | |
1243 | ||
8e09f215 SW |
1244 | private = (struct dasd_eckd_private *) block->base->private; |
1245 | if (dasd_check_blocksize(block->bp_block) == 0) { | |
1da177e4 | 1246 | geo->sectors = recs_per_track(&private->rdc_data, |
8e09f215 | 1247 | 0, block->bp_block); |
1da177e4 LT |
1248 | } |
1249 | geo->cylinders = private->rdc_data.no_cyl; | |
1250 | geo->heads = private->rdc_data.trk_per_cyl; | |
1251 | return 0; | |
1252 | } | |
1253 | ||
1254 | static struct dasd_ccw_req * | |
1255 | dasd_eckd_format_device(struct dasd_device * device, | |
1256 | struct format_data_t * fdata) | |
1257 | { | |
1258 | struct dasd_eckd_private *private; | |
1259 | struct dasd_ccw_req *fcp; | |
1260 | struct eckd_count *ect; | |
1261 | struct ccw1 *ccw; | |
1262 | void *data; | |
1263 | int rpt, cyl, head; | |
1264 | int cplength, datasize; | |
1265 | int i; | |
1266 | ||
1267 | private = (struct dasd_eckd_private *) device->private; | |
1268 | rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize); | |
1269 | cyl = fdata->start_unit / private->rdc_data.trk_per_cyl; | |
1270 | head = fdata->start_unit % private->rdc_data.trk_per_cyl; | |
1271 | ||
1272 | /* Sanity checks. */ | |
1273 | if (fdata->start_unit >= | |
1274 | (private->rdc_data.no_cyl * private->rdc_data.trk_per_cyl)) { | |
1275 | DEV_MESSAGE(KERN_INFO, device, "Track no %d too big!", | |
1276 | fdata->start_unit); | |
1277 | return ERR_PTR(-EINVAL); | |
1278 | } | |
1279 | if (fdata->start_unit > fdata->stop_unit) { | |
1280 | DEV_MESSAGE(KERN_INFO, device, "Track %d reached! ending.", | |
1281 | fdata->start_unit); | |
1282 | return ERR_PTR(-EINVAL); | |
1283 | } | |
1284 | if (dasd_check_blocksize(fdata->blksize) != 0) { | |
1285 | DEV_MESSAGE(KERN_WARNING, device, | |
1286 | "Invalid blocksize %d...terminating!", | |
1287 | fdata->blksize); | |
1288 | return ERR_PTR(-EINVAL); | |
1289 | } | |
1290 | ||
1291 | /* | |
1292 | * fdata->intensity is a bit string that tells us what to do: | |
1293 | * Bit 0: write record zero | |
1294 | * Bit 1: write home address, currently not supported | |
1295 | * Bit 2: invalidate tracks | |
1296 | * Bit 3: use OS/390 compatible disk layout (cdl) | |
1297 | * Only some bit combinations do make sense. | |
1298 | */ | |
1299 | switch (fdata->intensity) { | |
1300 | case 0x00: /* Normal format */ | |
1301 | case 0x08: /* Normal format, use cdl. */ | |
1302 | cplength = 2 + rpt; | |
1303 | datasize = sizeof(struct DE_eckd_data) + | |
1304 | sizeof(struct LO_eckd_data) + | |
1305 | rpt * sizeof(struct eckd_count); | |
1306 | break; | |
1307 | case 0x01: /* Write record zero and format track. */ | |
1308 | case 0x09: /* Write record zero and format track, use cdl. */ | |
1309 | cplength = 3 + rpt; | |
1310 | datasize = sizeof(struct DE_eckd_data) + | |
1311 | sizeof(struct LO_eckd_data) + | |
1312 | sizeof(struct eckd_count) + | |
1313 | rpt * sizeof(struct eckd_count); | |
1314 | break; | |
1315 | case 0x04: /* Invalidate track. */ | |
1316 | case 0x0c: /* Invalidate track, use cdl. */ | |
1317 | cplength = 3; | |
1318 | datasize = sizeof(struct DE_eckd_data) + | |
1319 | sizeof(struct LO_eckd_data) + | |
1320 | sizeof(struct eckd_count); | |
1321 | break; | |
1322 | default: | |
1323 | DEV_MESSAGE(KERN_WARNING, device, "Invalid flags 0x%x.", | |
1324 | fdata->intensity); | |
1325 | return ERR_PTR(-EINVAL); | |
1326 | } | |
1327 | /* Allocate the format ccw request. */ | |
1328 | fcp = dasd_smalloc_request(dasd_eckd_discipline.name, | |
1329 | cplength, datasize, device); | |
1330 | if (IS_ERR(fcp)) | |
1331 | return fcp; | |
1332 | ||
1333 | data = fcp->data; | |
1334 | ccw = fcp->cpaddr; | |
1335 | ||
1336 | switch (fdata->intensity & ~0x08) { | |
1337 | case 0x00: /* Normal format. */ | |
1338 | define_extent(ccw++, (struct DE_eckd_data *) data, | |
1339 | fdata->start_unit, fdata->start_unit, | |
1340 | DASD_ECKD_CCW_WRITE_CKD, device); | |
1341 | data += sizeof(struct DE_eckd_data); | |
1342 | ccw[-1].flags |= CCW_FLAG_CC; | |
1343 | locate_record(ccw++, (struct LO_eckd_data *) data, | |
1344 | fdata->start_unit, 0, rpt, | |
1345 | DASD_ECKD_CCW_WRITE_CKD, device, | |
1346 | fdata->blksize); | |
1347 | data += sizeof(struct LO_eckd_data); | |
1348 | break; | |
1349 | case 0x01: /* Write record zero + format track. */ | |
1350 | define_extent(ccw++, (struct DE_eckd_data *) data, | |
1351 | fdata->start_unit, fdata->start_unit, | |
1352 | DASD_ECKD_CCW_WRITE_RECORD_ZERO, | |
1353 | device); | |
1354 | data += sizeof(struct DE_eckd_data); | |
1355 | ccw[-1].flags |= CCW_FLAG_CC; | |
1356 | locate_record(ccw++, (struct LO_eckd_data *) data, | |
1357 | fdata->start_unit, 0, rpt + 1, | |
1358 | DASD_ECKD_CCW_WRITE_RECORD_ZERO, device, | |
8e09f215 | 1359 | device->block->bp_block); |
1da177e4 LT |
1360 | data += sizeof(struct LO_eckd_data); |
1361 | break; | |
1362 | case 0x04: /* Invalidate track. */ | |
1363 | define_extent(ccw++, (struct DE_eckd_data *) data, | |
1364 | fdata->start_unit, fdata->start_unit, | |
1365 | DASD_ECKD_CCW_WRITE_CKD, device); | |
1366 | data += sizeof(struct DE_eckd_data); | |
1367 | ccw[-1].flags |= CCW_FLAG_CC; | |
1368 | locate_record(ccw++, (struct LO_eckd_data *) data, | |
1369 | fdata->start_unit, 0, 1, | |
1370 | DASD_ECKD_CCW_WRITE_CKD, device, 8); | |
1371 | data += sizeof(struct LO_eckd_data); | |
1372 | break; | |
1373 | } | |
1374 | if (fdata->intensity & 0x01) { /* write record zero */ | |
1375 | ect = (struct eckd_count *) data; | |
1376 | data += sizeof(struct eckd_count); | |
1377 | ect->cyl = cyl; | |
1378 | ect->head = head; | |
1379 | ect->record = 0; | |
1380 | ect->kl = 0; | |
1381 | ect->dl = 8; | |
1382 | ccw[-1].flags |= CCW_FLAG_CC; | |
1383 | ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; | |
1384 | ccw->flags = CCW_FLAG_SLI; | |
1385 | ccw->count = 8; | |
1386 | ccw->cda = (__u32)(addr_t) ect; | |
1387 | ccw++; | |
1388 | } | |
1389 | if ((fdata->intensity & ~0x08) & 0x04) { /* erase track */ | |
1390 | ect = (struct eckd_count *) data; | |
1391 | data += sizeof(struct eckd_count); | |
1392 | ect->cyl = cyl; | |
1393 | ect->head = head; | |
1394 | ect->record = 1; | |
1395 | ect->kl = 0; | |
1396 | ect->dl = 0; | |
1397 | ccw[-1].flags |= CCW_FLAG_CC; | |
1398 | ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; | |
1399 | ccw->flags = CCW_FLAG_SLI; | |
1400 | ccw->count = 8; | |
1401 | ccw->cda = (__u32)(addr_t) ect; | |
1402 | } else { /* write remaining records */ | |
1403 | for (i = 0; i < rpt; i++) { | |
1404 | ect = (struct eckd_count *) data; | |
1405 | data += sizeof(struct eckd_count); | |
1406 | ect->cyl = cyl; | |
1407 | ect->head = head; | |
1408 | ect->record = i + 1; | |
1409 | ect->kl = 0; | |
1410 | ect->dl = fdata->blksize; | |
1411 | /* Check for special tracks 0-1 when formatting CDL */ | |
1412 | if ((fdata->intensity & 0x08) && | |
1413 | fdata->start_unit == 0) { | |
1414 | if (i < 3) { | |
1415 | ect->kl = 4; | |
1416 | ect->dl = sizes_trk0[i] - 4; | |
138c014d | 1417 | } |
1da177e4 LT |
1418 | } |
1419 | if ((fdata->intensity & 0x08) && | |
1420 | fdata->start_unit == 1) { | |
1421 | ect->kl = 44; | |
1422 | ect->dl = LABEL_SIZE - 44; | |
1423 | } | |
1424 | ccw[-1].flags |= CCW_FLAG_CC; | |
1425 | ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; | |
1426 | ccw->flags = CCW_FLAG_SLI; | |
1427 | ccw->count = 8; | |
1428 | ccw->cda = (__u32)(addr_t) ect; | |
1429 | ccw++; | |
1430 | } | |
1431 | } | |
8e09f215 SW |
1432 | fcp->startdev = device; |
1433 | fcp->memdev = device; | |
1434 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &fcp->flags); | |
1435 | fcp->retries = 5; /* set retry counter to enable default ERP */ | |
1da177e4 LT |
1436 | fcp->buildclk = get_clock(); |
1437 | fcp->status = DASD_CQR_FILLED; | |
1438 | return fcp; | |
1439 | } | |
1440 | ||
8e09f215 | 1441 | static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) |
1da177e4 | 1442 | { |
8e09f215 SW |
1443 | cqr->status = DASD_CQR_FILLED; |
1444 | if (cqr->block && (cqr->startdev != cqr->block->base)) { | |
1445 | dasd_eckd_reset_ccw_to_base_io(cqr); | |
1446 | cqr->startdev = cqr->block->base; | |
1da177e4 | 1447 | } |
8e09f215 | 1448 | }; |
1da177e4 LT |
1449 | |
1450 | static dasd_erp_fn_t | |
1451 | dasd_eckd_erp_action(struct dasd_ccw_req * cqr) | |
1452 | { | |
8e09f215 | 1453 | struct dasd_device *device = (struct dasd_device *) cqr->startdev; |
1da177e4 LT |
1454 | struct ccw_device *cdev = device->cdev; |
1455 | ||
1456 | switch (cdev->id.cu_type) { | |
1457 | case 0x3990: | |
1458 | case 0x2105: | |
1459 | case 0x2107: | |
1460 | case 0x1750: | |
1461 | return dasd_3990_erp_action; | |
1462 | case 0x9343: | |
1463 | case 0x3880: | |
1464 | default: | |
1465 | return dasd_default_erp_action; | |
1466 | } | |
1467 | } | |
1468 | ||
1469 | static dasd_erp_fn_t | |
1470 | dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) | |
1471 | { | |
1472 | return dasd_default_erp_postaction; | |
1473 | } | |
1474 | ||
8e09f215 SW |
1475 | |
1476 | static void dasd_eckd_handle_unsolicited_interrupt(struct dasd_device *device, | |
1477 | struct irb *irb) | |
1478 | { | |
1479 | char mask; | |
1480 | ||
1481 | /* first of all check for state change pending interrupt */ | |
1482 | mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; | |
23d805b6 | 1483 | if ((irb->scsw.cmd.dstat & mask) == mask) { |
8e09f215 SW |
1484 | dasd_generic_handle_state_change(device); |
1485 | return; | |
1486 | } | |
1487 | ||
1488 | /* summary unit check */ | |
23d805b6 PO |
1489 | if ((irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) && |
1490 | (irb->ecw[7] == 0x0D)) { | |
8e09f215 SW |
1491 | dasd_alias_handle_summary_unit_check(device, irb); |
1492 | return; | |
1493 | } | |
1494 | ||
f60c768c SH |
1495 | |
1496 | /* service information message SIM */ | |
9d853caf SH |
1497 | if (irb->esw.esw0.erw.cons && (irb->ecw[27] & DASD_SENSE_BIT_0) && |
1498 | ((irb->ecw[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { | |
f60c768c | 1499 | dasd_3990_erp_handle_sim(device, irb->ecw); |
9d853caf | 1500 | dasd_schedule_device_bh(device); |
f60c768c SH |
1501 | return; |
1502 | } | |
1503 | ||
8e09f215 SW |
1504 | /* just report other unsolicited interrupts */ |
1505 | DEV_MESSAGE(KERN_DEBUG, device, "%s", | |
1506 | "unsolicited interrupt received"); | |
1507 | device->discipline->dump_sense(device, NULL, irb); | |
1508 | dasd_schedule_device_bh(device); | |
1509 | ||
1510 | return; | |
1511 | }; | |
1512 | ||
1513 | static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, | |
1514 | struct dasd_block *block, | |
1515 | struct request *req) | |
1da177e4 LT |
1516 | { |
1517 | struct dasd_eckd_private *private; | |
1518 | unsigned long *idaws; | |
1519 | struct LO_eckd_data *LO_data; | |
1520 | struct dasd_ccw_req *cqr; | |
1521 | struct ccw1 *ccw; | |
5705f702 | 1522 | struct req_iterator iter; |
1da177e4 LT |
1523 | struct bio_vec *bv; |
1524 | char *dst; | |
1525 | unsigned int blksize, blk_per_trk, off; | |
1526 | int count, cidaw, cplength, datasize; | |
1527 | sector_t recid, first_rec, last_rec; | |
1528 | sector_t first_trk, last_trk; | |
1529 | unsigned int first_offs, last_offs; | |
1530 | unsigned char cmd, rcmd; | |
8e09f215 SW |
1531 | int use_prefix; |
1532 | struct dasd_device *basedev; | |
1da177e4 | 1533 | |
8e09f215 SW |
1534 | basedev = block->base; |
1535 | private = (struct dasd_eckd_private *) basedev->private; | |
1da177e4 LT |
1536 | if (rq_data_dir(req) == READ) |
1537 | cmd = DASD_ECKD_CCW_READ_MT; | |
1538 | else if (rq_data_dir(req) == WRITE) | |
1539 | cmd = DASD_ECKD_CCW_WRITE_MT; | |
1540 | else | |
1541 | return ERR_PTR(-EINVAL); | |
1542 | /* Calculate number of blocks/records per track. */ | |
8e09f215 | 1543 | blksize = block->bp_block; |
1da177e4 LT |
1544 | blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); |
1545 | /* Calculate record id of first and last block. */ | |
8e09f215 | 1546 | first_rec = first_trk = req->sector >> block->s2b_shift; |
1da177e4 LT |
1547 | first_offs = sector_div(first_trk, blk_per_trk); |
1548 | last_rec = last_trk = | |
8e09f215 | 1549 | (req->sector + req->nr_sectors - 1) >> block->s2b_shift; |
1da177e4 LT |
1550 | last_offs = sector_div(last_trk, blk_per_trk); |
1551 | /* Check struct bio and count the number of blocks for the request. */ | |
1552 | count = 0; | |
1553 | cidaw = 0; | |
5705f702 | 1554 | rq_for_each_segment(bv, req, iter) { |
6c92e699 JA |
1555 | if (bv->bv_len & (blksize - 1)) |
1556 | /* Eckd can only do full blocks. */ | |
1557 | return ERR_PTR(-EINVAL); | |
8e09f215 | 1558 | count += bv->bv_len >> (block->s2b_shift + 9); |
347a8dc3 | 1559 | #if defined(CONFIG_64BIT) |
6c92e699 | 1560 | if (idal_is_needed (page_address(bv->bv_page), bv->bv_len)) |
8e09f215 | 1561 | cidaw += bv->bv_len >> (block->s2b_shift + 9); |
1da177e4 | 1562 | #endif |
1da177e4 LT |
1563 | } |
1564 | /* Paranoia. */ | |
1565 | if (count != last_rec - first_rec + 1) | |
1566 | return ERR_PTR(-EINVAL); | |
8e09f215 SW |
1567 | |
1568 | /* use the prefix command if available */ | |
1569 | use_prefix = private->features.feature[8] & 0x01; | |
1570 | if (use_prefix) { | |
1571 | /* 1x prefix + number of blocks */ | |
1572 | cplength = 2 + count; | |
1573 | /* 1x prefix + cidaws*sizeof(long) */ | |
1574 | datasize = sizeof(struct PFX_eckd_data) + | |
1575 | sizeof(struct LO_eckd_data) + | |
1576 | cidaw * sizeof(unsigned long); | |
1577 | } else { | |
1578 | /* 1x define extent + 1x locate record + number of blocks */ | |
1579 | cplength = 2 + count; | |
1580 | /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ | |
1581 | datasize = sizeof(struct DE_eckd_data) + | |
1582 | sizeof(struct LO_eckd_data) + | |
1583 | cidaw * sizeof(unsigned long); | |
1584 | } | |
1da177e4 LT |
1585 | /* Find out the number of additional locate record ccws for cdl. */ |
1586 | if (private->uses_cdl && first_rec < 2*blk_per_trk) { | |
1587 | if (last_rec >= 2*blk_per_trk) | |
1588 | count = 2*blk_per_trk - first_rec; | |
1589 | cplength += count; | |
1590 | datasize += count*sizeof(struct LO_eckd_data); | |
1591 | } | |
1592 | /* Allocate the ccw request. */ | |
1593 | cqr = dasd_smalloc_request(dasd_eckd_discipline.name, | |
8e09f215 | 1594 | cplength, datasize, startdev); |
1da177e4 LT |
1595 | if (IS_ERR(cqr)) |
1596 | return cqr; | |
1597 | ccw = cqr->cpaddr; | |
8e09f215 SW |
1598 | /* First ccw is define extent or prefix. */ |
1599 | if (use_prefix) { | |
1600 | if (prefix(ccw++, cqr->data, first_trk, | |
1601 | last_trk, cmd, basedev, startdev) == -EAGAIN) { | |
1602 | /* Clock not in sync and XRC is enabled. | |
1603 | * Try again later. | |
1604 | */ | |
1605 | dasd_sfree_request(cqr, startdev); | |
1606 | return ERR_PTR(-EAGAIN); | |
1607 | } | |
1608 | idaws = (unsigned long *) (cqr->data + | |
1609 | sizeof(struct PFX_eckd_data)); | |
1610 | } else { | |
1611 | if (define_extent(ccw++, cqr->data, first_trk, | |
1612 | last_trk, cmd, startdev) == -EAGAIN) { | |
1613 | /* Clock not in sync and XRC is enabled. | |
1614 | * Try again later. | |
1615 | */ | |
1616 | dasd_sfree_request(cqr, startdev); | |
1617 | return ERR_PTR(-EAGAIN); | |
1618 | } | |
1619 | idaws = (unsigned long *) (cqr->data + | |
1620 | sizeof(struct DE_eckd_data)); | |
d54853ef | 1621 | } |
1da177e4 | 1622 | /* Build locate_record+read/write/ccws. */ |
1da177e4 LT |
1623 | LO_data = (struct LO_eckd_data *) (idaws + cidaw); |
1624 | recid = first_rec; | |
1625 | if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { | |
1626 | /* Only standard blocks so there is just one locate record. */ | |
1627 | ccw[-1].flags |= CCW_FLAG_CC; | |
1628 | locate_record(ccw++, LO_data++, first_trk, first_offs + 1, | |
8e09f215 | 1629 | last_rec - recid + 1, cmd, basedev, blksize); |
1da177e4 | 1630 | } |
5705f702 | 1631 | rq_for_each_segment(bv, req, iter) { |
1da177e4 LT |
1632 | dst = page_address(bv->bv_page) + bv->bv_offset; |
1633 | if (dasd_page_cache) { | |
1634 | char *copy = kmem_cache_alloc(dasd_page_cache, | |
441e143e | 1635 | GFP_DMA | __GFP_NOWARN); |
1da177e4 LT |
1636 | if (copy && rq_data_dir(req) == WRITE) |
1637 | memcpy(copy + bv->bv_offset, dst, bv->bv_len); | |
1638 | if (copy) | |
1639 | dst = copy + bv->bv_offset; | |
1640 | } | |
1641 | for (off = 0; off < bv->bv_len; off += blksize) { | |
1642 | sector_t trkid = recid; | |
1643 | unsigned int recoffs = sector_div(trkid, blk_per_trk); | |
1644 | rcmd = cmd; | |
1645 | count = blksize; | |
1646 | /* Locate record for cdl special block ? */ | |
1647 | if (private->uses_cdl && recid < 2*blk_per_trk) { | |
1648 | if (dasd_eckd_cdl_special(blk_per_trk, recid)){ | |
1649 | rcmd |= 0x8; | |
1650 | count = dasd_eckd_cdl_reclen(recid); | |
ec5883ab HH |
1651 | if (count < blksize && |
1652 | rq_data_dir(req) == READ) | |
1da177e4 LT |
1653 | memset(dst + count, 0xe5, |
1654 | blksize - count); | |
1655 | } | |
1656 | ccw[-1].flags |= CCW_FLAG_CC; | |
1657 | locate_record(ccw++, LO_data++, | |
1658 | trkid, recoffs + 1, | |
8e09f215 | 1659 | 1, rcmd, basedev, count); |
1da177e4 LT |
1660 | } |
1661 | /* Locate record for standard blocks ? */ | |
1662 | if (private->uses_cdl && recid == 2*blk_per_trk) { | |
1663 | ccw[-1].flags |= CCW_FLAG_CC; | |
1664 | locate_record(ccw++, LO_data++, | |
1665 | trkid, recoffs + 1, | |
1666 | last_rec - recid + 1, | |
8e09f215 | 1667 | cmd, basedev, count); |
1da177e4 LT |
1668 | } |
1669 | /* Read/write ccw. */ | |
1670 | ccw[-1].flags |= CCW_FLAG_CC; | |
1671 | ccw->cmd_code = rcmd; | |
1672 | ccw->count = count; | |
1673 | if (idal_is_needed(dst, blksize)) { | |
1674 | ccw->cda = (__u32)(addr_t) idaws; | |
1675 | ccw->flags = CCW_FLAG_IDA; | |
1676 | idaws = idal_create_words(idaws, dst, blksize); | |
1677 | } else { | |
1678 | ccw->cda = (__u32)(addr_t) dst; | |
1679 | ccw->flags = 0; | |
1680 | } | |
1681 | ccw++; | |
1682 | dst += blksize; | |
1683 | recid++; | |
1684 | } | |
1685 | } | |
4aff5e23 | 1686 | if (req->cmd_flags & REQ_FAILFAST) |
1c01b8a5 | 1687 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
8e09f215 SW |
1688 | cqr->startdev = startdev; |
1689 | cqr->memdev = startdev; | |
1690 | cqr->block = block; | |
1da177e4 LT |
1691 | cqr->expires = 5 * 60 * HZ; /* 5 minutes */ |
1692 | cqr->lpm = private->path_data.ppm; | |
1693 | cqr->retries = 256; | |
1694 | cqr->buildclk = get_clock(); | |
1695 | cqr->status = DASD_CQR_FILLED; | |
1696 | return cqr; | |
1697 | } | |
1698 | ||
1699 | static int | |
1700 | dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) | |
1701 | { | |
1702 | struct dasd_eckd_private *private; | |
1703 | struct ccw1 *ccw; | |
5705f702 | 1704 | struct req_iterator iter; |
1da177e4 LT |
1705 | struct bio_vec *bv; |
1706 | char *dst, *cda; | |
1707 | unsigned int blksize, blk_per_trk, off; | |
1708 | sector_t recid; | |
5705f702 | 1709 | int status; |
1da177e4 LT |
1710 | |
1711 | if (!dasd_page_cache) | |
1712 | goto out; | |
8e09f215 SW |
1713 | private = (struct dasd_eckd_private *) cqr->block->base->private; |
1714 | blksize = cqr->block->bp_block; | |
1da177e4 | 1715 | blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); |
8e09f215 | 1716 | recid = req->sector >> cqr->block->s2b_shift; |
1da177e4 LT |
1717 | ccw = cqr->cpaddr; |
1718 | /* Skip over define extent & locate record. */ | |
1719 | ccw++; | |
1720 | if (private->uses_cdl == 0 || recid > 2*blk_per_trk) | |
1721 | ccw++; | |
5705f702 | 1722 | rq_for_each_segment(bv, req, iter) { |
1da177e4 LT |
1723 | dst = page_address(bv->bv_page) + bv->bv_offset; |
1724 | for (off = 0; off < bv->bv_len; off += blksize) { | |
1725 | /* Skip locate record. */ | |
1726 | if (private->uses_cdl && recid <= 2*blk_per_trk) | |
1727 | ccw++; | |
1728 | if (dst) { | |
1729 | if (ccw->flags & CCW_FLAG_IDA) | |
1730 | cda = *((char **)((addr_t) ccw->cda)); | |
1731 | else | |
1732 | cda = (char *)((addr_t) ccw->cda); | |
1733 | if (dst != cda) { | |
1734 | if (rq_data_dir(req) == READ) | |
1735 | memcpy(dst, cda, bv->bv_len); | |
1736 | kmem_cache_free(dasd_page_cache, | |
1737 | (void *)((addr_t)cda & PAGE_MASK)); | |
1738 | } | |
1739 | dst = NULL; | |
1740 | } | |
1741 | ccw++; | |
1742 | recid++; | |
1743 | } | |
1744 | } | |
1745 | out: | |
1746 | status = cqr->status == DASD_CQR_DONE; | |
8e09f215 | 1747 | dasd_sfree_request(cqr, cqr->memdev); |
1da177e4 LT |
1748 | return status; |
1749 | } | |
1750 | ||
8e09f215 SW |
1751 | /* |
1752 | * Modify ccw chain in cqr so it can be started on a base device. | |
1753 | * | |
1754 | * Note that this is not enough to restart the cqr! | |
1755 | * Either reset cqr->startdev as well (summary unit check handling) | |
1756 | * or restart via separate cqr (as in ERP handling). | |
1757 | */ | |
1758 | void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) | |
1759 | { | |
1760 | struct ccw1 *ccw; | |
1761 | struct PFX_eckd_data *pfxdata; | |
1762 | ||
1763 | ccw = cqr->cpaddr; | |
1764 | pfxdata = cqr->data; | |
1765 | ||
1766 | if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { | |
1767 | pfxdata->validity.verify_base = 0; | |
1768 | pfxdata->validity.hyper_pav = 0; | |
1769 | } | |
1770 | } | |
1771 | ||
1772 | #define DASD_ECKD_CHANQ_MAX_SIZE 4 | |
1773 | ||
1774 | static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, | |
1775 | struct dasd_block *block, | |
1776 | struct request *req) | |
1777 | { | |
1778 | struct dasd_eckd_private *private; | |
1779 | struct dasd_device *startdev; | |
1780 | unsigned long flags; | |
1781 | struct dasd_ccw_req *cqr; | |
1782 | ||
1783 | startdev = dasd_alias_get_start_dev(base); | |
1784 | if (!startdev) | |
1785 | startdev = base; | |
1786 | private = (struct dasd_eckd_private *) startdev->private; | |
1787 | if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) | |
1788 | return ERR_PTR(-EBUSY); | |
1789 | ||
1790 | spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); | |
1791 | private->count++; | |
1792 | cqr = dasd_eckd_build_cp(startdev, block, req); | |
1793 | if (IS_ERR(cqr)) | |
1794 | private->count--; | |
1795 | spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); | |
1796 | return cqr; | |
1797 | } | |
1798 | ||
1799 | static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, | |
1800 | struct request *req) | |
1801 | { | |
1802 | struct dasd_eckd_private *private; | |
1803 | unsigned long flags; | |
1804 | ||
1805 | spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); | |
1806 | private = (struct dasd_eckd_private *) cqr->memdev->private; | |
1807 | private->count--; | |
1808 | spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); | |
1809 | return dasd_eckd_free_cp(cqr, req); | |
1810 | } | |
1811 | ||
1da177e4 LT |
1812 | static int |
1813 | dasd_eckd_fill_info(struct dasd_device * device, | |
1814 | struct dasd_information2_t * info) | |
1815 | { | |
1816 | struct dasd_eckd_private *private; | |
1817 | ||
1818 | private = (struct dasd_eckd_private *) device->private; | |
1819 | info->label_block = 2; | |
1820 | info->FBA_layout = private->uses_cdl ? 0 : 1; | |
1821 | info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; | |
1822 | info->characteristics_size = sizeof(struct dasd_eckd_characteristics); | |
1823 | memcpy(info->characteristics, &private->rdc_data, | |
1824 | sizeof(struct dasd_eckd_characteristics)); | |
4abb08c2 SW |
1825 | info->confdata_size = min((unsigned long)private->conf_len, |
1826 | sizeof(info->configuration_data)); | |
1827 | memcpy(info->configuration_data, private->conf_data, | |
1828 | info->confdata_size); | |
1da177e4 LT |
1829 | return 0; |
1830 | } | |
1831 | ||
1832 | /* | |
1833 | * SECTION: ioctl functions for eckd devices. | |
1834 | */ | |
1835 | ||
1836 | /* | |
1837 | * Release device ioctl. | |
138c014d | 1838 | * Buils a channel programm to releases a prior reserved |
1da177e4 LT |
1839 | * (see dasd_eckd_reserve) device. |
1840 | */ | |
1841 | static int | |
1107ccfb | 1842 | dasd_eckd_release(struct dasd_device *device) |
1da177e4 | 1843 | { |
1da177e4 LT |
1844 | struct dasd_ccw_req *cqr; |
1845 | int rc; | |
1846 | ||
1847 | if (!capable(CAP_SYS_ADMIN)) | |
1848 | return -EACCES; | |
1849 | ||
1da177e4 LT |
1850 | cqr = dasd_smalloc_request(dasd_eckd_discipline.name, |
1851 | 1, 32, device); | |
1852 | if (IS_ERR(cqr)) { | |
1853 | DEV_MESSAGE(KERN_WARNING, device, "%s", | |
1854 | "Could not allocate initialization request"); | |
1855 | return PTR_ERR(cqr); | |
1856 | } | |
1857 | cqr->cpaddr->cmd_code = DASD_ECKD_CCW_RELEASE; | |
1858 | cqr->cpaddr->flags |= CCW_FLAG_SLI; | |
1859 | cqr->cpaddr->count = 32; | |
1860 | cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; | |
8e09f215 SW |
1861 | cqr->startdev = device; |
1862 | cqr->memdev = device; | |
1da177e4 | 1863 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
1c01b8a5 | 1864 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
336c340b | 1865 | cqr->retries = 2; /* set retry counter to enable basic ERP */ |
1da177e4 LT |
1866 | cqr->expires = 2 * HZ; |
1867 | cqr->buildclk = get_clock(); | |
1868 | cqr->status = DASD_CQR_FILLED; | |
1869 | ||
1870 | rc = dasd_sleep_on_immediatly(cqr); | |
1871 | ||
8e09f215 | 1872 | dasd_sfree_request(cqr, cqr->memdev); |
1da177e4 LT |
1873 | return rc; |
1874 | } | |
1875 | ||
1876 | /* | |
1877 | * Reserve device ioctl. | |
1878 | * Options are set to 'synchronous wait for interrupt' and | |
138c014d HH |
1879 | * 'timeout the request'. This leads to a terminate IO if |
1880 | * the interrupt is outstanding for a certain time. | |
1da177e4 LT |
1881 | */ |
1882 | static int | |
1107ccfb | 1883 | dasd_eckd_reserve(struct dasd_device *device) |
1da177e4 | 1884 | { |
1da177e4 LT |
1885 | struct dasd_ccw_req *cqr; |
1886 | int rc; | |
1887 | ||
1888 | if (!capable(CAP_SYS_ADMIN)) | |
1889 | return -EACCES; | |
1890 | ||
1da177e4 LT |
1891 | cqr = dasd_smalloc_request(dasd_eckd_discipline.name, |
1892 | 1, 32, device); | |
1893 | if (IS_ERR(cqr)) { | |
1894 | DEV_MESSAGE(KERN_WARNING, device, "%s", | |
1895 | "Could not allocate initialization request"); | |
1896 | return PTR_ERR(cqr); | |
1897 | } | |
1898 | cqr->cpaddr->cmd_code = DASD_ECKD_CCW_RESERVE; | |
1899 | cqr->cpaddr->flags |= CCW_FLAG_SLI; | |
1900 | cqr->cpaddr->count = 32; | |
1901 | cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; | |
8e09f215 SW |
1902 | cqr->startdev = device; |
1903 | cqr->memdev = device; | |
1da177e4 | 1904 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
1c01b8a5 | 1905 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
336c340b | 1906 | cqr->retries = 2; /* set retry counter to enable basic ERP */ |
1da177e4 LT |
1907 | cqr->expires = 2 * HZ; |
1908 | cqr->buildclk = get_clock(); | |
1909 | cqr->status = DASD_CQR_FILLED; | |
1910 | ||
1911 | rc = dasd_sleep_on_immediatly(cqr); | |
1912 | ||
8e09f215 | 1913 | dasd_sfree_request(cqr, cqr->memdev); |
1da177e4 LT |
1914 | return rc; |
1915 | } | |
1916 | ||
1917 | /* | |
1918 | * Steal lock ioctl - unconditional reserve device. | |
138c014d | 1919 | * Buils a channel programm to break a device's reservation. |
1da177e4 LT |
1920 | * (unconditional reserve) |
1921 | */ | |
1922 | static int | |
1107ccfb | 1923 | dasd_eckd_steal_lock(struct dasd_device *device) |
1da177e4 | 1924 | { |
1da177e4 LT |
1925 | struct dasd_ccw_req *cqr; |
1926 | int rc; | |
1927 | ||
1928 | if (!capable(CAP_SYS_ADMIN)) | |
1929 | return -EACCES; | |
1930 | ||
1da177e4 LT |
1931 | cqr = dasd_smalloc_request(dasd_eckd_discipline.name, |
1932 | 1, 32, device); | |
1933 | if (IS_ERR(cqr)) { | |
1934 | DEV_MESSAGE(KERN_WARNING, device, "%s", | |
1935 | "Could not allocate initialization request"); | |
1936 | return PTR_ERR(cqr); | |
1937 | } | |
1938 | cqr->cpaddr->cmd_code = DASD_ECKD_CCW_SLCK; | |
1939 | cqr->cpaddr->flags |= CCW_FLAG_SLI; | |
1940 | cqr->cpaddr->count = 32; | |
1941 | cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; | |
8e09f215 SW |
1942 | cqr->startdev = device; |
1943 | cqr->memdev = device; | |
1da177e4 | 1944 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
1c01b8a5 | 1945 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
336c340b | 1946 | cqr->retries = 2; /* set retry counter to enable basic ERP */ |
1da177e4 LT |
1947 | cqr->expires = 2 * HZ; |
1948 | cqr->buildclk = get_clock(); | |
1949 | cqr->status = DASD_CQR_FILLED; | |
1950 | ||
1951 | rc = dasd_sleep_on_immediatly(cqr); | |
1952 | ||
8e09f215 | 1953 | dasd_sfree_request(cqr, cqr->memdev); |
1da177e4 LT |
1954 | return rc; |
1955 | } | |
1956 | ||
1957 | /* | |
1958 | * Read performance statistics | |
1959 | */ | |
1960 | static int | |
1107ccfb | 1961 | dasd_eckd_performance(struct dasd_device *device, void __user *argp) |
1da177e4 | 1962 | { |
1da177e4 LT |
1963 | struct dasd_psf_prssd_data *prssdp; |
1964 | struct dasd_rssd_perf_stats_t *stats; | |
1965 | struct dasd_ccw_req *cqr; | |
1966 | struct ccw1 *ccw; | |
1967 | int rc; | |
1968 | ||
1da177e4 LT |
1969 | cqr = dasd_smalloc_request(dasd_eckd_discipline.name, |
1970 | 1 /* PSF */ + 1 /* RSSD */ , | |
8e09f215 SW |
1971 | (sizeof(struct dasd_psf_prssd_data) + |
1972 | sizeof(struct dasd_rssd_perf_stats_t)), | |
1da177e4 LT |
1973 | device); |
1974 | if (IS_ERR(cqr)) { | |
1975 | DEV_MESSAGE(KERN_WARNING, device, "%s", | |
1976 | "Could not allocate initialization request"); | |
1977 | return PTR_ERR(cqr); | |
1978 | } | |
8e09f215 SW |
1979 | cqr->startdev = device; |
1980 | cqr->memdev = device; | |
1da177e4 LT |
1981 | cqr->retries = 0; |
1982 | cqr->expires = 10 * HZ; | |
1983 | ||
1984 | /* Prepare for Read Subsystem Data */ | |
1985 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
8e09f215 | 1986 | memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); |
1da177e4 | 1987 | prssdp->order = PSF_ORDER_PRSSD; |
5d67d164 | 1988 | prssdp->suborder = 0x01; /* Performance Statistics */ |
1da177e4 LT |
1989 | prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ |
1990 | ||
1991 | ccw = cqr->cpaddr; | |
1992 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
8e09f215 | 1993 | ccw->count = sizeof(struct dasd_psf_prssd_data); |
1da177e4 LT |
1994 | ccw->flags |= CCW_FLAG_CC; |
1995 | ccw->cda = (__u32)(addr_t) prssdp; | |
1996 | ||
1997 | /* Read Subsystem Data - Performance Statistics */ | |
1998 | stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); | |
8e09f215 | 1999 | memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); |
1da177e4 LT |
2000 | |
2001 | ccw++; | |
2002 | ccw->cmd_code = DASD_ECKD_CCW_RSSD; | |
8e09f215 | 2003 | ccw->count = sizeof(struct dasd_rssd_perf_stats_t); |
1da177e4 LT |
2004 | ccw->cda = (__u32)(addr_t) stats; |
2005 | ||
2006 | cqr->buildclk = get_clock(); | |
2007 | cqr->status = DASD_CQR_FILLED; | |
2008 | rc = dasd_sleep_on(cqr); | |
2009 | if (rc == 0) { | |
1da177e4 LT |
2010 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; |
2011 | stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); | |
1107ccfb CH |
2012 | if (copy_to_user(argp, stats, |
2013 | sizeof(struct dasd_rssd_perf_stats_t))) | |
2014 | rc = -EFAULT; | |
1da177e4 | 2015 | } |
8e09f215 | 2016 | dasd_sfree_request(cqr, cqr->memdev); |
1da177e4 LT |
2017 | return rc; |
2018 | } | |
2019 | ||
2020 | /* | |
2021 | * Get attributes (cache operations) | |
2022 | * Returnes the cache attributes used in Define Extend (DE). | |
2023 | */ | |
2024 | static int | |
1107ccfb | 2025 | dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) |
1da177e4 | 2026 | { |
1107ccfb CH |
2027 | struct dasd_eckd_private *private = |
2028 | (struct dasd_eckd_private *)device->private; | |
2029 | struct attrib_data_t attrib = private->attrib; | |
1da177e4 LT |
2030 | int rc; |
2031 | ||
2032 | if (!capable(CAP_SYS_ADMIN)) | |
2033 | return -EACCES; | |
1107ccfb | 2034 | if (!argp) |
1da177e4 LT |
2035 | return -EINVAL; |
2036 | ||
1107ccfb CH |
2037 | rc = 0; |
2038 | if (copy_to_user(argp, (long *) &attrib, | |
8e09f215 | 2039 | sizeof(struct attrib_data_t))) |
1107ccfb | 2040 | rc = -EFAULT; |
1da177e4 LT |
2041 | |
2042 | return rc; | |
2043 | } | |
2044 | ||
2045 | /* | |
2046 | * Set attributes (cache operations) | |
2047 | * Stores the attributes for cache operation to be used in Define Extend (DE). | |
2048 | */ | |
2049 | static int | |
1107ccfb | 2050 | dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) |
1da177e4 | 2051 | { |
1107ccfb CH |
2052 | struct dasd_eckd_private *private = |
2053 | (struct dasd_eckd_private *)device->private; | |
1da177e4 LT |
2054 | struct attrib_data_t attrib; |
2055 | ||
2056 | if (!capable(CAP_SYS_ADMIN)) | |
2057 | return -EACCES; | |
1107ccfb | 2058 | if (!argp) |
1da177e4 LT |
2059 | return -EINVAL; |
2060 | ||
1107ccfb | 2061 | if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) |
1da177e4 | 2062 | return -EFAULT; |
1da177e4 LT |
2063 | private->attrib = attrib; |
2064 | ||
2065 | DEV_MESSAGE(KERN_INFO, device, | |
2066 | "cache operation mode set to %x (%i cylinder prestage)", | |
2067 | private->attrib.operation, private->attrib.nr_cyl); | |
2068 | return 0; | |
2069 | } | |
2070 | ||
1107ccfb | 2071 | static int |
8e09f215 | 2072 | dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) |
1107ccfb | 2073 | { |
8e09f215 SW |
2074 | struct dasd_device *device = block->base; |
2075 | ||
1107ccfb CH |
2076 | switch (cmd) { |
2077 | case BIODASDGATTR: | |
2078 | return dasd_eckd_get_attrib(device, argp); | |
2079 | case BIODASDSATTR: | |
2080 | return dasd_eckd_set_attrib(device, argp); | |
2081 | case BIODASDPSRD: | |
2082 | return dasd_eckd_performance(device, argp); | |
2083 | case BIODASDRLSE: | |
2084 | return dasd_eckd_release(device); | |
2085 | case BIODASDRSRV: | |
2086 | return dasd_eckd_reserve(device); | |
2087 | case BIODASDSLCK: | |
2088 | return dasd_eckd_steal_lock(device); | |
2089 | default: | |
2090 | return -ENOIOCTLCMD; | |
2091 | } | |
2092 | } | |
2093 | ||
445b5b49 HH |
2094 | /* |
2095 | * Dump the range of CCWs into 'page' buffer | |
2096 | * and return number of printed chars. | |
2097 | */ | |
4d284cac | 2098 | static int |
445b5b49 HH |
2099 | dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) |
2100 | { | |
2101 | int len, count; | |
2102 | char *datap; | |
2103 | ||
2104 | len = 0; | |
2105 | while (from <= to) { | |
2106 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER | |
2107 | " CCW %p: %08X %08X DAT:", | |
2108 | from, ((int *) from)[0], ((int *) from)[1]); | |
2109 | ||
2110 | /* get pointer to data (consider IDALs) */ | |
2111 | if (from->flags & CCW_FLAG_IDA) | |
2112 | datap = (char *) *((addr_t *) (addr_t) from->cda); | |
2113 | else | |
2114 | datap = (char *) ((addr_t) from->cda); | |
2115 | ||
2116 | /* dump data (max 32 bytes) */ | |
2117 | for (count = 0; count < from->count && count < 32; count++) { | |
2118 | if (count % 8 == 0) len += sprintf(page + len, " "); | |
2119 | if (count % 4 == 0) len += sprintf(page + len, " "); | |
2120 | len += sprintf(page + len, "%02x", datap[count]); | |
2121 | } | |
2122 | len += sprintf(page + len, "\n"); | |
2123 | from++; | |
2124 | } | |
2125 | return len; | |
2126 | } | |
2127 | ||
1da177e4 LT |
2128 | /* |
2129 | * Print sense data and related channel program. | |
2130 | * Parts are printed because printk buffer is only 1024 bytes. | |
2131 | */ | |
8e09f215 SW |
2132 | static void dasd_eckd_dump_sense(struct dasd_device *device, |
2133 | struct dasd_ccw_req *req, struct irb *irb) | |
1da177e4 LT |
2134 | { |
2135 | char *page; | |
445b5b49 HH |
2136 | struct ccw1 *first, *last, *fail, *from, *to; |
2137 | int len, sl, sct; | |
1da177e4 LT |
2138 | |
2139 | page = (char *) get_zeroed_page(GFP_ATOMIC); | |
2140 | if (page == NULL) { | |
2141 | DEV_MESSAGE(KERN_ERR, device, " %s", | |
2142 | "No memory to dump sense data"); | |
2143 | return; | |
2144 | } | |
445b5b49 HH |
2145 | /* dump the sense data */ |
2146 | len = sprintf(page, KERN_ERR PRINTK_HEADER | |
1da177e4 | 2147 | " I/O status report for device %s:\n", |
2a0217d5 | 2148 | dev_name(&device->cdev->dev)); |
1da177e4 LT |
2149 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER |
2150 | " in req: %p CS: 0x%02X DS: 0x%02X\n", req, | |
23d805b6 | 2151 | irb->scsw.cmd.cstat, irb->scsw.cmd.dstat); |
1da177e4 LT |
2152 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER |
2153 | " device %s: Failing CCW: %p\n", | |
2a0217d5 | 2154 | dev_name(&device->cdev->dev), |
23d805b6 | 2155 | (void *) (addr_t) irb->scsw.cmd.cpa); |
1da177e4 LT |
2156 | if (irb->esw.esw0.erw.cons) { |
2157 | for (sl = 0; sl < 4; sl++) { | |
2158 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER | |
2159 | " Sense(hex) %2d-%2d:", | |
2160 | (8 * sl), ((8 * sl) + 7)); | |
2161 | ||
2162 | for (sct = 0; sct < 8; sct++) { | |
2163 | len += sprintf(page + len, " %02x", | |
2164 | irb->ecw[8 * sl + sct]); | |
2165 | } | |
2166 | len += sprintf(page + len, "\n"); | |
2167 | } | |
2168 | ||
2169 | if (irb->ecw[27] & DASD_SENSE_BIT_0) { | |
2170 | /* 24 Byte Sense Data */ | |
445b5b49 HH |
2171 | sprintf(page + len, KERN_ERR PRINTK_HEADER |
2172 | " 24 Byte: %x MSG %x, " | |
2173 | "%s MSGb to SYSOP\n", | |
2174 | irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, | |
2175 | irb->ecw[1] & 0x10 ? "" : "no"); | |
1da177e4 LT |
2176 | } else { |
2177 | /* 32 Byte Sense Data */ | |
445b5b49 HH |
2178 | sprintf(page + len, KERN_ERR PRINTK_HEADER |
2179 | " 32 Byte: Format: %x " | |
2180 | "Exception class %x\n", | |
2181 | irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); | |
1da177e4 LT |
2182 | } |
2183 | } else { | |
445b5b49 HH |
2184 | sprintf(page + len, KERN_ERR PRINTK_HEADER |
2185 | " SORRY - NO VALID SENSE AVAILABLE\n"); | |
1da177e4 | 2186 | } |
445b5b49 HH |
2187 | printk("%s", page); |
2188 | ||
8e09f215 SW |
2189 | if (req) { |
2190 | /* req == NULL for unsolicited interrupts */ | |
2191 | /* dump the Channel Program (max 140 Bytes per line) */ | |
2192 | /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ | |
2193 | first = req->cpaddr; | |
2194 | for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); | |
2195 | to = min(first + 6, last); | |
2196 | len = sprintf(page, KERN_ERR PRINTK_HEADER | |
2197 | " Related CP in req: %p\n", req); | |
2198 | dasd_eckd_dump_ccw_range(first, to, page + len); | |
2199 | printk("%s", page); | |
1da177e4 | 2200 | |
8e09f215 SW |
2201 | /* print failing CCW area (maximum 4) */ |
2202 | /* scsw->cda is either valid or zero */ | |
2203 | len = 0; | |
2204 | from = ++to; | |
23d805b6 PO |
2205 | fail = (struct ccw1 *)(addr_t) |
2206 | irb->scsw.cmd.cpa; /* failing CCW */ | |
8e09f215 SW |
2207 | if (from < fail - 2) { |
2208 | from = fail - 2; /* there is a gap - print header */ | |
2209 | len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n"); | |
2210 | } | |
2211 | to = min(fail + 1, last); | |
2212 | len += dasd_eckd_dump_ccw_range(from, to, page + len); | |
2213 | ||
2214 | /* print last CCWs (maximum 2) */ | |
2215 | from = max(from, ++to); | |
2216 | if (from < last - 1) { | |
2217 | from = last - 1; /* there is a gap - print header */ | |
2218 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n"); | |
2219 | } | |
2220 | len += dasd_eckd_dump_ccw_range(from, last, page + len); | |
2221 | if (len > 0) | |
2222 | printk("%s", page); | |
1da177e4 | 2223 | } |
1da177e4 LT |
2224 | free_page((unsigned long) page); |
2225 | } | |
2226 | ||
2227 | /* | |
2228 | * max_blocks is dependent on the amount of storage that is available | |
2229 | * in the static io buffer for each device. Currently each device has | |
2230 | * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has | |
2231 | * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use | |
2232 | * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In | |
2233 | * addition we have one define extent ccw + 16 bytes of data and one | |
2234 | * locate record ccw + 16 bytes of data. That makes: | |
2235 | * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. | |
2236 | * We want to fit two into the available memory so that we can immediately | |
2237 | * start the next request if one finishes off. That makes 249.5 blocks | |
2238 | * for one request. Give a little safety and the result is 240. | |
2239 | */ | |
2240 | static struct dasd_discipline dasd_eckd_discipline = { | |
2241 | .owner = THIS_MODULE, | |
2242 | .name = "ECKD", | |
2243 | .ebcname = "ECKD", | |
2244 | .max_blocks = 240, | |
2245 | .check_device = dasd_eckd_check_characteristics, | |
8e09f215 | 2246 | .uncheck_device = dasd_eckd_uncheck_device, |
1da177e4 | 2247 | .do_analysis = dasd_eckd_do_analysis, |
8e09f215 SW |
2248 | .ready_to_online = dasd_eckd_ready_to_online, |
2249 | .online_to_ready = dasd_eckd_online_to_ready, | |
1da177e4 LT |
2250 | .fill_geometry = dasd_eckd_fill_geometry, |
2251 | .start_IO = dasd_start_IO, | |
2252 | .term_IO = dasd_term_IO, | |
8e09f215 | 2253 | .handle_terminated_request = dasd_eckd_handle_terminated_request, |
1da177e4 | 2254 | .format_device = dasd_eckd_format_device, |
1da177e4 LT |
2255 | .erp_action = dasd_eckd_erp_action, |
2256 | .erp_postaction = dasd_eckd_erp_postaction, | |
8e09f215 SW |
2257 | .handle_unsolicited_interrupt = dasd_eckd_handle_unsolicited_interrupt, |
2258 | .build_cp = dasd_eckd_build_alias_cp, | |
2259 | .free_cp = dasd_eckd_free_alias_cp, | |
1da177e4 LT |
2260 | .dump_sense = dasd_eckd_dump_sense, |
2261 | .fill_info = dasd_eckd_fill_info, | |
1107ccfb | 2262 | .ioctl = dasd_eckd_ioctl, |
1da177e4 LT |
2263 | }; |
2264 | ||
2265 | static int __init | |
2266 | dasd_eckd_init(void) | |
2267 | { | |
1da177e4 | 2268 | ASCEBC(dasd_eckd_discipline.ebcname, 4); |
40545573 | 2269 | return ccw_driver_register(&dasd_eckd_driver); |
1da177e4 LT |
2270 | } |
2271 | ||
2272 | static void __exit | |
2273 | dasd_eckd_cleanup(void) | |
2274 | { | |
2275 | ccw_driver_unregister(&dasd_eckd_driver); | |
1da177e4 LT |
2276 | } |
2277 | ||
2278 | module_init(dasd_eckd_init); | |
2279 | module_exit(dasd_eckd_cleanup); |