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