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> | |
d41dd122 | 8 | * Copyright IBM Corp. 1999, 2009 |
ab1d848f NH |
9 | * EMC Symmetrix ioctl Copyright EMC Corporation, 2008 |
10 | * Author.........: Nigel Hislop <hislop_nigel@emc.com> | |
1da177e4 LT |
11 | */ |
12 | ||
ca99dab0 | 13 | #define KMSG_COMPONENT "dasd-eckd" |
fc19f381 | 14 | |
1da177e4 LT |
15 | #include <linux/stddef.h> |
16 | #include <linux/kernel.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/hdreg.h> /* HDIO_GETGEO */ | |
19 | #include <linux/bio.h> | |
20 | #include <linux/module.h> | |
21 | #include <linux/init.h> | |
22 | ||
23 | #include <asm/debug.h> | |
24 | #include <asm/idals.h> | |
25 | #include <asm/ebcdic.h> | |
f8b06859 | 26 | #include <asm/compat.h> |
1da177e4 | 27 | #include <asm/io.h> |
1da177e4 | 28 | #include <asm/uaccess.h> |
40545573 | 29 | #include <asm/cio.h> |
1da177e4 | 30 | #include <asm/ccwdev.h> |
f3eb5384 | 31 | #include <asm/itcw.h> |
1da177e4 LT |
32 | |
33 | #include "dasd_int.h" | |
34 | #include "dasd_eckd.h" | |
f3eb5384 SW |
35 | #include "../cio/chsc.h" |
36 | ||
1da177e4 LT |
37 | |
38 | #ifdef PRINTK_HEADER | |
39 | #undef PRINTK_HEADER | |
40 | #endif /* PRINTK_HEADER */ | |
41 | #define PRINTK_HEADER "dasd(eckd):" | |
42 | ||
43 | #define ECKD_C0(i) (i->home_bytes) | |
44 | #define ECKD_F(i) (i->formula) | |
45 | #define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\ | |
46 | (i->factors.f_0x02.f1)) | |
47 | #define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\ | |
48 | (i->factors.f_0x02.f2)) | |
49 | #define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\ | |
50 | (i->factors.f_0x02.f3)) | |
51 | #define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0) | |
52 | #define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0) | |
53 | #define ECKD_F6(i) (i->factor6) | |
54 | #define ECKD_F7(i) (i->factor7) | |
55 | #define ECKD_F8(i) (i->factor8) | |
56 | ||
e4dbb0f2 SH |
57 | /* |
58 | * raw track access always map to 64k in memory | |
59 | * so it maps to 16 blocks of 4k per track | |
60 | */ | |
61 | #define DASD_RAW_BLOCK_PER_TRACK 16 | |
62 | #define DASD_RAW_BLOCKSIZE 4096 | |
63 | /* 64k are 128 x 512 byte sectors */ | |
64 | #define DASD_RAW_SECTORS_PER_TRACK 128 | |
65 | ||
1da177e4 LT |
66 | MODULE_LICENSE("GPL"); |
67 | ||
68 | static struct dasd_discipline dasd_eckd_discipline; | |
69 | ||
1da177e4 LT |
70 | /* The ccw bus type uses this table to find devices that it sends to |
71 | * dasd_eckd_probe */ | |
72 | static struct ccw_device_id dasd_eckd_ids[] = { | |
d2c993d8 HC |
73 | { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1}, |
74 | { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2}, | |
75 | { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3390, 0), .driver_info = 0x3}, | |
76 | { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4}, | |
77 | { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5}, | |
78 | { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6}, | |
79 | { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7}, | |
80 | { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8}, | |
81 | { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9}, | |
82 | { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa}, | |
1da177e4 LT |
83 | { /* end of list */ }, |
84 | }; | |
85 | ||
86 | MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids); | |
87 | ||
88 | static struct ccw_driver dasd_eckd_driver; /* see below */ | |
89 | ||
eb6e199b SW |
90 | #define INIT_CQR_OK 0 |
91 | #define INIT_CQR_UNFORMATTED 1 | |
92 | #define INIT_CQR_ERROR 2 | |
93 | ||
f932bcea SW |
94 | /* emergency request for reserve/release */ |
95 | static struct { | |
96 | struct dasd_ccw_req cqr; | |
97 | struct ccw1 ccw; | |
98 | char data[32]; | |
99 | } *dasd_reserve_req; | |
100 | static DEFINE_MUTEX(dasd_reserve_mutex); | |
101 | ||
a4d26c6a SW |
102 | /* definitions for the path verification worker */ |
103 | struct path_verification_work_data { | |
104 | struct work_struct worker; | |
105 | struct dasd_device *device; | |
106 | struct dasd_ccw_req cqr; | |
107 | struct ccw1 ccw; | |
108 | __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE]; | |
109 | int isglobal; | |
110 | __u8 tbvpm; | |
111 | }; | |
112 | static struct path_verification_work_data *path_verification_worker; | |
113 | static DEFINE_MUTEX(dasd_path_verification_mutex); | |
eb6e199b | 114 | |
1da177e4 LT |
115 | /* initial attempt at a probe function. this can be simplified once |
116 | * the other detection code is gone */ | |
117 | static int | |
118 | dasd_eckd_probe (struct ccw_device *cdev) | |
119 | { | |
120 | int ret; | |
121 | ||
40545573 | 122 | /* set ECKD specific ccw-device options */ |
454e1fa1 PO |
123 | ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE | |
124 | CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH); | |
40545573 | 125 | if (ret) { |
b8ed5dd5 SH |
126 | DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", |
127 | "dasd_eckd_probe: could not set " | |
128 | "ccw-device options"); | |
1da177e4 | 129 | return ret; |
40545573 HH |
130 | } |
131 | ret = dasd_generic_probe(cdev, &dasd_eckd_discipline); | |
132 | return ret; | |
1da177e4 LT |
133 | } |
134 | ||
135 | static int | |
136 | dasd_eckd_set_online(struct ccw_device *cdev) | |
137 | { | |
40545573 | 138 | return dasd_generic_set_online(cdev, &dasd_eckd_discipline); |
1da177e4 LT |
139 | } |
140 | ||
1da177e4 LT |
141 | static const int sizes_trk0[] = { 28, 148, 84 }; |
142 | #define LABEL_SIZE 140 | |
143 | ||
144 | static inline unsigned int | |
145 | round_up_multiple(unsigned int no, unsigned int mult) | |
146 | { | |
147 | int rem = no % mult; | |
148 | return (rem ? no - rem + mult : no); | |
149 | } | |
150 | ||
151 | static inline unsigned int | |
152 | ceil_quot(unsigned int d1, unsigned int d2) | |
153 | { | |
154 | return (d1 + (d2 - 1)) / d2; | |
155 | } | |
156 | ||
4d284cac | 157 | static unsigned int |
1da177e4 LT |
158 | recs_per_track(struct dasd_eckd_characteristics * rdc, |
159 | unsigned int kl, unsigned int dl) | |
160 | { | |
161 | int dn, kn; | |
162 | ||
163 | switch (rdc->dev_type) { | |
164 | case 0x3380: | |
165 | if (kl) | |
166 | return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + | |
167 | ceil_quot(dl + 12, 32)); | |
168 | else | |
169 | return 1499 / (15 + ceil_quot(dl + 12, 32)); | |
170 | case 0x3390: | |
171 | dn = ceil_quot(dl + 6, 232) + 1; | |
172 | if (kl) { | |
173 | kn = ceil_quot(kl + 6, 232) + 1; | |
174 | return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + | |
175 | 9 + ceil_quot(dl + 6 * dn, 34)); | |
176 | } else | |
177 | return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); | |
178 | case 0x9345: | |
179 | dn = ceil_quot(dl + 6, 232) + 1; | |
180 | if (kl) { | |
181 | kn = ceil_quot(kl + 6, 232) + 1; | |
182 | return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + | |
183 | ceil_quot(dl + 6 * dn, 34)); | |
184 | } else | |
185 | return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); | |
186 | } | |
187 | return 0; | |
188 | } | |
189 | ||
b44b0ab3 SW |
190 | static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) |
191 | { | |
192 | geo->cyl = (__u16) cyl; | |
193 | geo->head = cyl >> 16; | |
194 | geo->head <<= 4; | |
195 | geo->head |= head; | |
196 | } | |
197 | ||
4d284cac | 198 | static int |
1da177e4 LT |
199 | check_XRC (struct ccw1 *de_ccw, |
200 | struct DE_eckd_data *data, | |
201 | struct dasd_device *device) | |
202 | { | |
203 | struct dasd_eckd_private *private; | |
d54853ef | 204 | int rc; |
1da177e4 LT |
205 | |
206 | private = (struct dasd_eckd_private *) device->private; | |
d54853ef MS |
207 | if (!private->rdc_data.facilities.XRC_supported) |
208 | return 0; | |
1da177e4 LT |
209 | |
210 | /* switch on System Time Stamp - needed for XRC Support */ | |
d54853ef MS |
211 | data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ |
212 | data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ | |
1da177e4 | 213 | |
d54853ef MS |
214 | rc = get_sync_clock(&data->ep_sys_time); |
215 | /* Ignore return code if sync clock is switched off. */ | |
216 | if (rc == -ENOSYS || rc == -EACCES) | |
217 | rc = 0; | |
1da177e4 | 218 | |
8e09f215 | 219 | de_ccw->count = sizeof(struct DE_eckd_data); |
d54853ef MS |
220 | de_ccw->flags |= CCW_FLAG_SLI; |
221 | return rc; | |
222 | } | |
1da177e4 | 223 | |
4d284cac | 224 | static int |
b44b0ab3 SW |
225 | define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, |
226 | unsigned int totrk, int cmd, struct dasd_device *device) | |
1da177e4 LT |
227 | { |
228 | struct dasd_eckd_private *private; | |
b44b0ab3 SW |
229 | u32 begcyl, endcyl; |
230 | u16 heads, beghead, endhead; | |
d54853ef | 231 | int rc = 0; |
1da177e4 LT |
232 | |
233 | private = (struct dasd_eckd_private *) device->private; | |
234 | ||
235 | ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; | |
236 | ccw->flags = 0; | |
237 | ccw->count = 16; | |
238 | ccw->cda = (__u32) __pa(data); | |
239 | ||
8e09f215 | 240 | memset(data, 0, sizeof(struct DE_eckd_data)); |
1da177e4 LT |
241 | switch (cmd) { |
242 | case DASD_ECKD_CCW_READ_HOME_ADDRESS: | |
243 | case DASD_ECKD_CCW_READ_RECORD_ZERO: | |
244 | case DASD_ECKD_CCW_READ: | |
245 | case DASD_ECKD_CCW_READ_MT: | |
246 | case DASD_ECKD_CCW_READ_CKD: | |
247 | case DASD_ECKD_CCW_READ_CKD_MT: | |
248 | case DASD_ECKD_CCW_READ_KD: | |
249 | case DASD_ECKD_CCW_READ_KD_MT: | |
250 | case DASD_ECKD_CCW_READ_COUNT: | |
251 | data->mask.perm = 0x1; | |
252 | data->attributes.operation = private->attrib.operation; | |
253 | break; | |
254 | case DASD_ECKD_CCW_WRITE: | |
255 | case DASD_ECKD_CCW_WRITE_MT: | |
256 | case DASD_ECKD_CCW_WRITE_KD: | |
257 | case DASD_ECKD_CCW_WRITE_KD_MT: | |
258 | data->mask.perm = 0x02; | |
259 | data->attributes.operation = private->attrib.operation; | |
d54853ef | 260 | rc = check_XRC (ccw, data, device); |
1da177e4 LT |
261 | break; |
262 | case DASD_ECKD_CCW_WRITE_CKD: | |
263 | case DASD_ECKD_CCW_WRITE_CKD_MT: | |
264 | data->attributes.operation = DASD_BYPASS_CACHE; | |
d54853ef | 265 | rc = check_XRC (ccw, data, device); |
1da177e4 LT |
266 | break; |
267 | case DASD_ECKD_CCW_ERASE: | |
268 | case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: | |
269 | case DASD_ECKD_CCW_WRITE_RECORD_ZERO: | |
270 | data->mask.perm = 0x3; | |
271 | data->mask.auth = 0x1; | |
272 | data->attributes.operation = DASD_BYPASS_CACHE; | |
d54853ef | 273 | rc = check_XRC (ccw, data, device); |
1da177e4 LT |
274 | break; |
275 | default: | |
fc19f381 SH |
276 | dev_err(&device->cdev->dev, |
277 | "0x%x is not a known command\n", cmd); | |
1da177e4 LT |
278 | break; |
279 | } | |
280 | ||
281 | data->attributes.mode = 0x3; /* ECKD */ | |
282 | ||
283 | if ((private->rdc_data.cu_type == 0x2105 || | |
284 | private->rdc_data.cu_type == 0x2107 || | |
285 | private->rdc_data.cu_type == 0x1750) | |
286 | && !(private->uses_cdl && trk < 2)) | |
287 | data->ga_extended |= 0x40; /* Regular Data Format Mode */ | |
288 | ||
b44b0ab3 SW |
289 | heads = private->rdc_data.trk_per_cyl; |
290 | begcyl = trk / heads; | |
291 | beghead = trk % heads; | |
292 | endcyl = totrk / heads; | |
293 | endhead = totrk % heads; | |
1da177e4 LT |
294 | |
295 | /* check for sequential prestage - enhance cylinder range */ | |
296 | if (data->attributes.operation == DASD_SEQ_PRESTAGE || | |
297 | data->attributes.operation == DASD_SEQ_ACCESS) { | |
138c014d | 298 | |
b44b0ab3 SW |
299 | if (endcyl + private->attrib.nr_cyl < private->real_cyl) |
300 | endcyl += private->attrib.nr_cyl; | |
1da177e4 | 301 | else |
b44b0ab3 | 302 | endcyl = (private->real_cyl - 1); |
1da177e4 LT |
303 | } |
304 | ||
b44b0ab3 SW |
305 | set_ch_t(&data->beg_ext, begcyl, beghead); |
306 | set_ch_t(&data->end_ext, endcyl, endhead); | |
d54853ef | 307 | return rc; |
1da177e4 LT |
308 | } |
309 | ||
8e09f215 SW |
310 | static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata, |
311 | struct dasd_device *device) | |
312 | { | |
313 | struct dasd_eckd_private *private; | |
314 | int rc; | |
315 | ||
316 | private = (struct dasd_eckd_private *) device->private; | |
317 | if (!private->rdc_data.facilities.XRC_supported) | |
318 | return 0; | |
319 | ||
320 | /* switch on System Time Stamp - needed for XRC Support */ | |
f3eb5384 SW |
321 | pfxdata->define_extent.ga_extended |= 0x08; /* 'Time Stamp Valid' */ |
322 | pfxdata->define_extent.ga_extended |= 0x02; /* 'Extended Parameter' */ | |
8e09f215 SW |
323 | pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ |
324 | ||
f3eb5384 | 325 | rc = get_sync_clock(&pfxdata->define_extent.ep_sys_time); |
8e09f215 SW |
326 | /* Ignore return code if sync clock is switched off. */ |
327 | if (rc == -ENOSYS || rc == -EACCES) | |
328 | rc = 0; | |
329 | return rc; | |
330 | } | |
331 | ||
f3eb5384 SW |
332 | static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk, |
333 | unsigned int rec_on_trk, int count, int cmd, | |
334 | struct dasd_device *device, unsigned int reclen, | |
335 | unsigned int tlf) | |
336 | { | |
337 | struct dasd_eckd_private *private; | |
338 | int sector; | |
339 | int dn, d; | |
340 | ||
341 | private = (struct dasd_eckd_private *) device->private; | |
342 | ||
343 | memset(data, 0, sizeof(*data)); | |
344 | sector = 0; | |
345 | if (rec_on_trk) { | |
346 | switch (private->rdc_data.dev_type) { | |
347 | case 0x3390: | |
348 | dn = ceil_quot(reclen + 6, 232); | |
349 | d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); | |
350 | sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; | |
351 | break; | |
352 | case 0x3380: | |
353 | d = 7 + ceil_quot(reclen + 12, 32); | |
354 | sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; | |
355 | break; | |
356 | } | |
357 | } | |
358 | data->sector = sector; | |
359 | /* note: meaning of count depends on the operation | |
360 | * for record based I/O it's the number of records, but for | |
361 | * track based I/O it's the number of tracks | |
362 | */ | |
363 | data->count = count; | |
364 | switch (cmd) { | |
365 | case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: | |
366 | data->operation.orientation = 0x3; | |
367 | data->operation.operation = 0x03; | |
368 | break; | |
369 | case DASD_ECKD_CCW_READ_HOME_ADDRESS: | |
370 | data->operation.orientation = 0x3; | |
371 | data->operation.operation = 0x16; | |
372 | break; | |
373 | case DASD_ECKD_CCW_WRITE_RECORD_ZERO: | |
374 | data->operation.orientation = 0x1; | |
375 | data->operation.operation = 0x03; | |
376 | data->count++; | |
377 | break; | |
378 | case DASD_ECKD_CCW_READ_RECORD_ZERO: | |
379 | data->operation.orientation = 0x3; | |
380 | data->operation.operation = 0x16; | |
381 | data->count++; | |
382 | break; | |
383 | case DASD_ECKD_CCW_WRITE: | |
384 | case DASD_ECKD_CCW_WRITE_MT: | |
385 | case DASD_ECKD_CCW_WRITE_KD: | |
386 | case DASD_ECKD_CCW_WRITE_KD_MT: | |
387 | data->auxiliary.length_valid = 0x1; | |
388 | data->length = reclen; | |
389 | data->operation.operation = 0x01; | |
390 | break; | |
391 | case DASD_ECKD_CCW_WRITE_CKD: | |
392 | case DASD_ECKD_CCW_WRITE_CKD_MT: | |
393 | data->auxiliary.length_valid = 0x1; | |
394 | data->length = reclen; | |
395 | data->operation.operation = 0x03; | |
396 | break; | |
e4dbb0f2 SH |
397 | case DASD_ECKD_CCW_WRITE_FULL_TRACK: |
398 | data->operation.orientation = 0x0; | |
399 | data->operation.operation = 0x3F; | |
400 | data->extended_operation = 0x11; | |
401 | data->length = 0; | |
402 | data->extended_parameter_length = 0x02; | |
403 | if (data->count > 8) { | |
404 | data->extended_parameter[0] = 0xFF; | |
405 | data->extended_parameter[1] = 0xFF; | |
406 | data->extended_parameter[1] <<= (16 - count); | |
407 | } else { | |
408 | data->extended_parameter[0] = 0xFF; | |
409 | data->extended_parameter[0] <<= (8 - count); | |
410 | data->extended_parameter[1] = 0x00; | |
411 | } | |
412 | data->sector = 0xFF; | |
413 | break; | |
f3eb5384 SW |
414 | case DASD_ECKD_CCW_WRITE_TRACK_DATA: |
415 | data->auxiliary.length_valid = 0x1; | |
416 | data->length = reclen; /* not tlf, as one might think */ | |
417 | data->operation.operation = 0x3F; | |
418 | data->extended_operation = 0x23; | |
419 | break; | |
420 | case DASD_ECKD_CCW_READ: | |
421 | case DASD_ECKD_CCW_READ_MT: | |
422 | case DASD_ECKD_CCW_READ_KD: | |
423 | case DASD_ECKD_CCW_READ_KD_MT: | |
424 | data->auxiliary.length_valid = 0x1; | |
425 | data->length = reclen; | |
426 | data->operation.operation = 0x06; | |
427 | break; | |
428 | case DASD_ECKD_CCW_READ_CKD: | |
429 | case DASD_ECKD_CCW_READ_CKD_MT: | |
430 | data->auxiliary.length_valid = 0x1; | |
431 | data->length = reclen; | |
432 | data->operation.operation = 0x16; | |
433 | break; | |
434 | case DASD_ECKD_CCW_READ_COUNT: | |
435 | data->operation.operation = 0x06; | |
436 | break; | |
e4dbb0f2 SH |
437 | case DASD_ECKD_CCW_READ_TRACK: |
438 | data->operation.orientation = 0x1; | |
439 | data->operation.operation = 0x0C; | |
440 | data->extended_parameter_length = 0; | |
441 | data->sector = 0xFF; | |
442 | break; | |
f3eb5384 SW |
443 | case DASD_ECKD_CCW_READ_TRACK_DATA: |
444 | data->auxiliary.length_valid = 0x1; | |
445 | data->length = tlf; | |
446 | data->operation.operation = 0x0C; | |
447 | break; | |
448 | case DASD_ECKD_CCW_ERASE: | |
449 | data->length = reclen; | |
450 | data->auxiliary.length_valid = 0x1; | |
451 | data->operation.operation = 0x0b; | |
452 | break; | |
453 | default: | |
454 | DBF_DEV_EVENT(DBF_ERR, device, | |
455 | "fill LRE unknown opcode 0x%x", cmd); | |
456 | BUG(); | |
457 | } | |
458 | set_ch_t(&data->seek_addr, | |
459 | trk / private->rdc_data.trk_per_cyl, | |
460 | trk % private->rdc_data.trk_per_cyl); | |
461 | data->search_arg.cyl = data->seek_addr.cyl; | |
462 | data->search_arg.head = data->seek_addr.head; | |
463 | data->search_arg.record = rec_on_trk; | |
464 | } | |
465 | ||
466 | static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, | |
467 | unsigned int trk, unsigned int totrk, int cmd, | |
468 | struct dasd_device *basedev, struct dasd_device *startdev, | |
469 | unsigned char format, unsigned int rec_on_trk, int count, | |
470 | unsigned int blksize, unsigned int tlf) | |
8e09f215 SW |
471 | { |
472 | struct dasd_eckd_private *basepriv, *startpriv; | |
f3eb5384 SW |
473 | struct DE_eckd_data *dedata; |
474 | struct LRE_eckd_data *lredata; | |
b44b0ab3 SW |
475 | u32 begcyl, endcyl; |
476 | u16 heads, beghead, endhead; | |
8e09f215 SW |
477 | int rc = 0; |
478 | ||
479 | basepriv = (struct dasd_eckd_private *) basedev->private; | |
480 | startpriv = (struct dasd_eckd_private *) startdev->private; | |
f3eb5384 SW |
481 | dedata = &pfxdata->define_extent; |
482 | lredata = &pfxdata->locate_record; | |
8e09f215 SW |
483 | |
484 | ccw->cmd_code = DASD_ECKD_CCW_PFX; | |
485 | ccw->flags = 0; | |
e4dbb0f2 SH |
486 | if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) { |
487 | ccw->count = sizeof(*pfxdata) + 2; | |
488 | ccw->cda = (__u32) __pa(pfxdata); | |
489 | memset(pfxdata, 0, sizeof(*pfxdata) + 2); | |
490 | } else { | |
491 | ccw->count = sizeof(*pfxdata); | |
492 | ccw->cda = (__u32) __pa(pfxdata); | |
493 | memset(pfxdata, 0, sizeof(*pfxdata)); | |
494 | } | |
8e09f215 | 495 | |
8e09f215 | 496 | /* prefix data */ |
f3eb5384 SW |
497 | if (format > 1) { |
498 | DBF_DEV_EVENT(DBF_ERR, basedev, | |
499 | "PFX LRE unknown format 0x%x", format); | |
500 | BUG(); | |
501 | return -EINVAL; | |
502 | } | |
503 | pfxdata->format = format; | |
4abb08c2 SW |
504 | pfxdata->base_address = basepriv->ned->unit_addr; |
505 | pfxdata->base_lss = basepriv->ned->ID; | |
f3eb5384 | 506 | pfxdata->validity.define_extent = 1; |
8e09f215 SW |
507 | |
508 | /* private uid is kept up to date, conf_data may be outdated */ | |
509 | if (startpriv->uid.type != UA_BASE_DEVICE) { | |
510 | pfxdata->validity.verify_base = 1; | |
511 | if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) | |
512 | pfxdata->validity.hyper_pav = 1; | |
513 | } | |
514 | ||
515 | /* define extend data (mostly)*/ | |
516 | switch (cmd) { | |
517 | case DASD_ECKD_CCW_READ_HOME_ADDRESS: | |
518 | case DASD_ECKD_CCW_READ_RECORD_ZERO: | |
519 | case DASD_ECKD_CCW_READ: | |
520 | case DASD_ECKD_CCW_READ_MT: | |
521 | case DASD_ECKD_CCW_READ_CKD: | |
522 | case DASD_ECKD_CCW_READ_CKD_MT: | |
523 | case DASD_ECKD_CCW_READ_KD: | |
524 | case DASD_ECKD_CCW_READ_KD_MT: | |
525 | case DASD_ECKD_CCW_READ_COUNT: | |
f3eb5384 SW |
526 | dedata->mask.perm = 0x1; |
527 | dedata->attributes.operation = basepriv->attrib.operation; | |
528 | break; | |
e4dbb0f2 | 529 | case DASD_ECKD_CCW_READ_TRACK: |
f3eb5384 SW |
530 | case DASD_ECKD_CCW_READ_TRACK_DATA: |
531 | dedata->mask.perm = 0x1; | |
532 | dedata->attributes.operation = basepriv->attrib.operation; | |
533 | dedata->blk_size = 0; | |
8e09f215 SW |
534 | break; |
535 | case DASD_ECKD_CCW_WRITE: | |
536 | case DASD_ECKD_CCW_WRITE_MT: | |
537 | case DASD_ECKD_CCW_WRITE_KD: | |
538 | case DASD_ECKD_CCW_WRITE_KD_MT: | |
f3eb5384 SW |
539 | dedata->mask.perm = 0x02; |
540 | dedata->attributes.operation = basepriv->attrib.operation; | |
8e09f215 SW |
541 | rc = check_XRC_on_prefix(pfxdata, basedev); |
542 | break; | |
543 | case DASD_ECKD_CCW_WRITE_CKD: | |
544 | case DASD_ECKD_CCW_WRITE_CKD_MT: | |
f3eb5384 | 545 | dedata->attributes.operation = DASD_BYPASS_CACHE; |
8e09f215 SW |
546 | rc = check_XRC_on_prefix(pfxdata, basedev); |
547 | break; | |
548 | case DASD_ECKD_CCW_ERASE: | |
549 | case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: | |
550 | case DASD_ECKD_CCW_WRITE_RECORD_ZERO: | |
f3eb5384 SW |
551 | dedata->mask.perm = 0x3; |
552 | dedata->mask.auth = 0x1; | |
553 | dedata->attributes.operation = DASD_BYPASS_CACHE; | |
8e09f215 SW |
554 | rc = check_XRC_on_prefix(pfxdata, basedev); |
555 | break; | |
e4dbb0f2 SH |
556 | case DASD_ECKD_CCW_WRITE_FULL_TRACK: |
557 | dedata->mask.perm = 0x03; | |
558 | dedata->attributes.operation = basepriv->attrib.operation; | |
559 | dedata->blk_size = 0; | |
560 | break; | |
f3eb5384 SW |
561 | case DASD_ECKD_CCW_WRITE_TRACK_DATA: |
562 | dedata->mask.perm = 0x02; | |
563 | dedata->attributes.operation = basepriv->attrib.operation; | |
564 | dedata->blk_size = blksize; | |
565 | rc = check_XRC_on_prefix(pfxdata, basedev); | |
8e09f215 | 566 | break; |
f3eb5384 SW |
567 | default: |
568 | DBF_DEV_EVENT(DBF_ERR, basedev, | |
569 | "PFX LRE unknown opcode 0x%x", cmd); | |
570 | BUG(); | |
571 | return -EINVAL; | |
8e09f215 SW |
572 | } |
573 | ||
f3eb5384 | 574 | dedata->attributes.mode = 0x3; /* ECKD */ |
8e09f215 SW |
575 | |
576 | if ((basepriv->rdc_data.cu_type == 0x2105 || | |
577 | basepriv->rdc_data.cu_type == 0x2107 || | |
578 | basepriv->rdc_data.cu_type == 0x1750) | |
579 | && !(basepriv->uses_cdl && trk < 2)) | |
f3eb5384 | 580 | dedata->ga_extended |= 0x40; /* Regular Data Format Mode */ |
8e09f215 | 581 | |
b44b0ab3 SW |
582 | heads = basepriv->rdc_data.trk_per_cyl; |
583 | begcyl = trk / heads; | |
584 | beghead = trk % heads; | |
585 | endcyl = totrk / heads; | |
586 | endhead = totrk % heads; | |
8e09f215 SW |
587 | |
588 | /* check for sequential prestage - enhance cylinder range */ | |
f3eb5384 SW |
589 | if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || |
590 | dedata->attributes.operation == DASD_SEQ_ACCESS) { | |
8e09f215 | 591 | |
b44b0ab3 SW |
592 | if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) |
593 | endcyl += basepriv->attrib.nr_cyl; | |
8e09f215 | 594 | else |
b44b0ab3 | 595 | endcyl = (basepriv->real_cyl - 1); |
8e09f215 SW |
596 | } |
597 | ||
f3eb5384 SW |
598 | set_ch_t(&dedata->beg_ext, begcyl, beghead); |
599 | set_ch_t(&dedata->end_ext, endcyl, endhead); | |
600 | ||
601 | if (format == 1) { | |
602 | fill_LRE_data(lredata, trk, rec_on_trk, count, cmd, | |
603 | basedev, blksize, tlf); | |
604 | } | |
605 | ||
8e09f215 SW |
606 | return rc; |
607 | } | |
608 | ||
f3eb5384 SW |
609 | static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, |
610 | unsigned int trk, unsigned int totrk, int cmd, | |
611 | struct dasd_device *basedev, struct dasd_device *startdev) | |
612 | { | |
613 | return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev, | |
614 | 0, 0, 0, 0, 0); | |
615 | } | |
616 | ||
4d284cac | 617 | static void |
b44b0ab3 SW |
618 | locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, |
619 | unsigned int rec_on_trk, int no_rec, int cmd, | |
1da177e4 LT |
620 | struct dasd_device * device, int reclen) |
621 | { | |
622 | struct dasd_eckd_private *private; | |
623 | int sector; | |
624 | int dn, d; | |
138c014d | 625 | |
1da177e4 LT |
626 | private = (struct dasd_eckd_private *) device->private; |
627 | ||
628 | DBF_DEV_EVENT(DBF_INFO, device, | |
629 | "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", | |
630 | trk, rec_on_trk, no_rec, cmd, reclen); | |
631 | ||
632 | ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; | |
633 | ccw->flags = 0; | |
634 | ccw->count = 16; | |
635 | ccw->cda = (__u32) __pa(data); | |
636 | ||
8e09f215 | 637 | memset(data, 0, sizeof(struct LO_eckd_data)); |
1da177e4 LT |
638 | sector = 0; |
639 | if (rec_on_trk) { | |
640 | switch (private->rdc_data.dev_type) { | |
641 | case 0x3390: | |
642 | dn = ceil_quot(reclen + 6, 232); | |
643 | d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); | |
644 | sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; | |
645 | break; | |
646 | case 0x3380: | |
647 | d = 7 + ceil_quot(reclen + 12, 32); | |
648 | sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; | |
649 | break; | |
650 | } | |
651 | } | |
652 | data->sector = sector; | |
653 | data->count = no_rec; | |
654 | switch (cmd) { | |
655 | case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: | |
656 | data->operation.orientation = 0x3; | |
657 | data->operation.operation = 0x03; | |
658 | break; | |
659 | case DASD_ECKD_CCW_READ_HOME_ADDRESS: | |
660 | data->operation.orientation = 0x3; | |
661 | data->operation.operation = 0x16; | |
662 | break; | |
663 | case DASD_ECKD_CCW_WRITE_RECORD_ZERO: | |
664 | data->operation.orientation = 0x1; | |
665 | data->operation.operation = 0x03; | |
666 | data->count++; | |
667 | break; | |
668 | case DASD_ECKD_CCW_READ_RECORD_ZERO: | |
669 | data->operation.orientation = 0x3; | |
670 | data->operation.operation = 0x16; | |
671 | data->count++; | |
672 | break; | |
673 | case DASD_ECKD_CCW_WRITE: | |
674 | case DASD_ECKD_CCW_WRITE_MT: | |
675 | case DASD_ECKD_CCW_WRITE_KD: | |
676 | case DASD_ECKD_CCW_WRITE_KD_MT: | |
677 | data->auxiliary.last_bytes_used = 0x1; | |
678 | data->length = reclen; | |
679 | data->operation.operation = 0x01; | |
680 | break; | |
681 | case DASD_ECKD_CCW_WRITE_CKD: | |
682 | case DASD_ECKD_CCW_WRITE_CKD_MT: | |
683 | data->auxiliary.last_bytes_used = 0x1; | |
684 | data->length = reclen; | |
685 | data->operation.operation = 0x03; | |
686 | break; | |
687 | case DASD_ECKD_CCW_READ: | |
688 | case DASD_ECKD_CCW_READ_MT: | |
689 | case DASD_ECKD_CCW_READ_KD: | |
690 | case DASD_ECKD_CCW_READ_KD_MT: | |
691 | data->auxiliary.last_bytes_used = 0x1; | |
692 | data->length = reclen; | |
693 | data->operation.operation = 0x06; | |
694 | break; | |
695 | case DASD_ECKD_CCW_READ_CKD: | |
696 | case DASD_ECKD_CCW_READ_CKD_MT: | |
697 | data->auxiliary.last_bytes_used = 0x1; | |
698 | data->length = reclen; | |
699 | data->operation.operation = 0x16; | |
700 | break; | |
701 | case DASD_ECKD_CCW_READ_COUNT: | |
702 | data->operation.operation = 0x06; | |
703 | break; | |
704 | case DASD_ECKD_CCW_ERASE: | |
705 | data->length = reclen; | |
706 | data->auxiliary.last_bytes_used = 0x1; | |
707 | data->operation.operation = 0x0b; | |
708 | break; | |
709 | default: | |
fc19f381 SH |
710 | DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record " |
711 | "opcode 0x%x", cmd); | |
1da177e4 | 712 | } |
b44b0ab3 SW |
713 | set_ch_t(&data->seek_addr, |
714 | trk / private->rdc_data.trk_per_cyl, | |
715 | trk % private->rdc_data.trk_per_cyl); | |
716 | data->search_arg.cyl = data->seek_addr.cyl; | |
717 | data->search_arg.head = data->seek_addr.head; | |
1da177e4 LT |
718 | data->search_arg.record = rec_on_trk; |
719 | } | |
720 | ||
721 | /* | |
722 | * Returns 1 if the block is one of the special blocks that needs | |
723 | * to get read/written with the KD variant of the command. | |
724 | * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and | |
725 | * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. | |
726 | * Luckily the KD variants differ only by one bit (0x08) from the | |
727 | * normal variant. So don't wonder about code like: | |
728 | * if (dasd_eckd_cdl_special(blk_per_trk, recid)) | |
729 | * ccw->cmd_code |= 0x8; | |
730 | */ | |
731 | static inline int | |
732 | dasd_eckd_cdl_special(int blk_per_trk, int recid) | |
733 | { | |
734 | if (recid < 3) | |
735 | return 1; | |
736 | if (recid < blk_per_trk) | |
737 | return 0; | |
738 | if (recid < 2 * blk_per_trk) | |
739 | return 1; | |
740 | return 0; | |
741 | } | |
742 | ||
743 | /* | |
744 | * Returns the record size for the special blocks of the cdl format. | |
745 | * Only returns something useful if dasd_eckd_cdl_special is true | |
746 | * for the recid. | |
747 | */ | |
748 | static inline int | |
749 | dasd_eckd_cdl_reclen(int recid) | |
750 | { | |
751 | if (recid < 3) | |
752 | return sizes_trk0[recid]; | |
753 | return LABEL_SIZE; | |
754 | } | |
755 | ||
3d052595 HH |
756 | /* |
757 | * Generate device unique id that specifies the physical device. | |
758 | */ | |
2dedf0d9 | 759 | static int dasd_eckd_generate_uid(struct dasd_device *device) |
3d052595 HH |
760 | { |
761 | struct dasd_eckd_private *private; | |
2dedf0d9 | 762 | struct dasd_uid *uid; |
4abb08c2 | 763 | int count; |
2dedf0d9 | 764 | unsigned long flags; |
3d052595 HH |
765 | |
766 | private = (struct dasd_eckd_private *) device->private; | |
767 | if (!private) | |
768 | return -ENODEV; | |
4abb08c2 | 769 | if (!private->ned || !private->gneq) |
3d052595 | 770 | return -ENODEV; |
2dedf0d9 SH |
771 | uid = &private->uid; |
772 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); | |
3d052595 | 773 | memset(uid, 0, sizeof(struct dasd_uid)); |
4abb08c2 | 774 | memcpy(uid->vendor, private->ned->HDA_manufacturer, |
d0710c7c | 775 | sizeof(uid->vendor) - 1); |
3d052595 | 776 | EBCASC(uid->vendor, sizeof(uid->vendor) - 1); |
4abb08c2 | 777 | memcpy(uid->serial, private->ned->HDA_location, |
d0710c7c | 778 | sizeof(uid->serial) - 1); |
3d052595 | 779 | EBCASC(uid->serial, sizeof(uid->serial) - 1); |
4abb08c2 | 780 | uid->ssid = private->gneq->subsystemID; |
a419aef8 | 781 | uid->real_unit_addr = private->ned->unit_addr; |
4abb08c2 SW |
782 | if (private->sneq) { |
783 | uid->type = private->sneq->sua_flags; | |
8e09f215 | 784 | if (uid->type == UA_BASE_PAV_ALIAS) |
4abb08c2 | 785 | uid->base_unit_addr = private->sneq->base_unit_addr; |
8e09f215 SW |
786 | } else { |
787 | uid->type = UA_BASE_DEVICE; | |
788 | } | |
4abb08c2 SW |
789 | if (private->vdsneq) { |
790 | for (count = 0; count < 16; count++) { | |
791 | sprintf(uid->vduit+2*count, "%02x", | |
792 | private->vdsneq->uit[count]); | |
793 | } | |
794 | } | |
2dedf0d9 | 795 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
3d052595 HH |
796 | return 0; |
797 | } | |
798 | ||
2dedf0d9 SH |
799 | static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid) |
800 | { | |
801 | struct dasd_eckd_private *private; | |
802 | unsigned long flags; | |
803 | ||
804 | if (device->private) { | |
805 | private = (struct dasd_eckd_private *)device->private; | |
806 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); | |
807 | *uid = private->uid; | |
808 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); | |
809 | return 0; | |
810 | } | |
811 | return -EINVAL; | |
812 | } | |
813 | ||
a4d26c6a SW |
814 | static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device, |
815 | struct dasd_ccw_req *cqr, | |
816 | __u8 *rcd_buffer, | |
817 | __u8 lpm) | |
17283b56 | 818 | { |
17283b56 | 819 | struct ccw1 *ccw; |
a4d26c6a SW |
820 | /* |
821 | * buffer has to start with EBCDIC "V1.0" to show | |
822 | * support for virtual device SNEQ | |
823 | */ | |
824 | rcd_buffer[0] = 0xE5; | |
825 | rcd_buffer[1] = 0xF1; | |
826 | rcd_buffer[2] = 0x4B; | |
827 | rcd_buffer[3] = 0xF0; | |
17283b56 CH |
828 | |
829 | ccw = cqr->cpaddr; | |
a4d26c6a SW |
830 | ccw->cmd_code = DASD_ECKD_CCW_RCD; |
831 | ccw->flags = 0; | |
17283b56 | 832 | ccw->cda = (__u32)(addr_t)rcd_buffer; |
a4d26c6a SW |
833 | ccw->count = DASD_ECKD_RCD_DATA_SIZE; |
834 | cqr->magic = DASD_ECKD_MAGIC; | |
17283b56 | 835 | |
8e09f215 SW |
836 | cqr->startdev = device; |
837 | cqr->memdev = device; | |
838 | cqr->block = NULL; | |
17283b56 CH |
839 | cqr->expires = 10*HZ; |
840 | cqr->lpm = lpm; | |
eb6e199b | 841 | cqr->retries = 256; |
17283b56 CH |
842 | cqr->buildclk = get_clock(); |
843 | cqr->status = DASD_CQR_FILLED; | |
a4d26c6a SW |
844 | set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); |
845 | } | |
846 | ||
847 | static int dasd_eckd_read_conf_immediately(struct dasd_device *device, | |
848 | struct dasd_ccw_req *cqr, | |
849 | __u8 *rcd_buffer, | |
850 | __u8 lpm) | |
851 | { | |
852 | struct ciw *ciw; | |
853 | int rc; | |
854 | /* | |
855 | * sanity check: scan for RCD command in extended SenseID data | |
856 | * some devices do not support RCD | |
857 | */ | |
858 | ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); | |
859 | if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) | |
860 | return -EOPNOTSUPP; | |
861 | ||
862 | dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm); | |
863 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); | |
5a27e60d | 864 | set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); |
a4d26c6a SW |
865 | cqr->retries = 5; |
866 | rc = dasd_sleep_on_immediatly(cqr); | |
867 | return rc; | |
17283b56 CH |
868 | } |
869 | ||
870 | static int dasd_eckd_read_conf_lpm(struct dasd_device *device, | |
871 | void **rcd_buffer, | |
872 | int *rcd_buffer_size, __u8 lpm) | |
873 | { | |
874 | struct ciw *ciw; | |
875 | char *rcd_buf = NULL; | |
876 | int ret; | |
877 | struct dasd_ccw_req *cqr; | |
878 | ||
879 | /* | |
a4d26c6a SW |
880 | * sanity check: scan for RCD command in extended SenseID data |
881 | * some devices do not support RCD | |
17283b56 CH |
882 | */ |
883 | ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); | |
a4d26c6a | 884 | if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) { |
17283b56 CH |
885 | ret = -EOPNOTSUPP; |
886 | goto out_error; | |
887 | } | |
a4d26c6a | 888 | rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA); |
17283b56 CH |
889 | if (!rcd_buf) { |
890 | ret = -ENOMEM; | |
891 | goto out_error; | |
892 | } | |
a4d26c6a SW |
893 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, |
894 | 0, /* use rcd_buf as data ara */ | |
895 | device); | |
17283b56 | 896 | if (IS_ERR(cqr)) { |
a4d26c6a SW |
897 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
898 | "Could not allocate RCD request"); | |
899 | ret = -ENOMEM; | |
17283b56 CH |
900 | goto out_error; |
901 | } | |
a4d26c6a | 902 | dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm); |
17283b56 CH |
903 | ret = dasd_sleep_on(cqr); |
904 | /* | |
905 | * on success we update the user input parms | |
906 | */ | |
8e09f215 | 907 | dasd_sfree_request(cqr, cqr->memdev); |
17283b56 CH |
908 | if (ret) |
909 | goto out_error; | |
910 | ||
a4d26c6a | 911 | *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE; |
17283b56 CH |
912 | *rcd_buffer = rcd_buf; |
913 | return 0; | |
914 | out_error: | |
915 | kfree(rcd_buf); | |
916 | *rcd_buffer = NULL; | |
917 | *rcd_buffer_size = 0; | |
918 | return ret; | |
919 | } | |
920 | ||
4abb08c2 SW |
921 | static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) |
922 | { | |
923 | ||
924 | struct dasd_sneq *sneq; | |
925 | int i, count; | |
926 | ||
927 | private->ned = NULL; | |
928 | private->sneq = NULL; | |
929 | private->vdsneq = NULL; | |
930 | private->gneq = NULL; | |
931 | count = private->conf_len / sizeof(struct dasd_sneq); | |
932 | sneq = (struct dasd_sneq *)private->conf_data; | |
933 | for (i = 0; i < count; ++i) { | |
934 | if (sneq->flags.identifier == 1 && sneq->format == 1) | |
935 | private->sneq = sneq; | |
936 | else if (sneq->flags.identifier == 1 && sneq->format == 4) | |
937 | private->vdsneq = (struct vd_sneq *)sneq; | |
938 | else if (sneq->flags.identifier == 2) | |
939 | private->gneq = (struct dasd_gneq *)sneq; | |
940 | else if (sneq->flags.identifier == 3 && sneq->res1 == 1) | |
941 | private->ned = (struct dasd_ned *)sneq; | |
942 | sneq++; | |
943 | } | |
944 | if (!private->ned || !private->gneq) { | |
945 | private->ned = NULL; | |
946 | private->sneq = NULL; | |
947 | private->vdsneq = NULL; | |
948 | private->gneq = NULL; | |
949 | return -EINVAL; | |
950 | } | |
951 | return 0; | |
952 | ||
953 | }; | |
954 | ||
955 | static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) | |
956 | { | |
957 | struct dasd_gneq *gneq; | |
958 | int i, count, found; | |
959 | ||
960 | count = conf_len / sizeof(*gneq); | |
961 | gneq = (struct dasd_gneq *)conf_data; | |
962 | found = 0; | |
963 | for (i = 0; i < count; ++i) { | |
964 | if (gneq->flags.identifier == 2) { | |
965 | found = 1; | |
966 | break; | |
967 | } | |
968 | gneq++; | |
969 | } | |
970 | if (found) | |
971 | return ((char *)gneq)[18] & 0x07; | |
972 | else | |
973 | return 0; | |
974 | } | |
975 | ||
976 | static int dasd_eckd_read_conf(struct dasd_device *device) | |
1da177e4 LT |
977 | { |
978 | void *conf_data; | |
979 | int conf_len, conf_data_saved; | |
980 | int rc; | |
a4d26c6a | 981 | __u8 lpm, opm; |
1da177e4 | 982 | struct dasd_eckd_private *private; |
a4d26c6a | 983 | struct dasd_path *path_data; |
1da177e4 LT |
984 | |
985 | private = (struct dasd_eckd_private *) device->private; | |
a4d26c6a SW |
986 | path_data = &device->path_data; |
987 | opm = ccw_device_get_path_mask(device->cdev); | |
1da177e4 LT |
988 | lpm = 0x80; |
989 | conf_data_saved = 0; | |
1da177e4 LT |
990 | /* get configuration data per operational path */ |
991 | for (lpm = 0x80; lpm; lpm>>= 1) { | |
a4d26c6a | 992 | if (lpm & opm) { |
17283b56 CH |
993 | rc = dasd_eckd_read_conf_lpm(device, &conf_data, |
994 | &conf_len, lpm); | |
1da177e4 | 995 | if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ |
b8ed5dd5 | 996 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, |
fc19f381 | 997 | "Read configuration data returned " |
b8ed5dd5 | 998 | "error %d", rc); |
1da177e4 LT |
999 | return rc; |
1000 | } | |
1001 | if (conf_data == NULL) { | |
b8ed5dd5 SH |
1002 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", |
1003 | "No configuration data " | |
1004 | "retrieved"); | |
a4d26c6a SW |
1005 | /* no further analysis possible */ |
1006 | path_data->opm |= lpm; | |
d133a960 | 1007 | continue; /* no error */ |
1da177e4 | 1008 | } |
1da177e4 | 1009 | /* save first valid configuration data */ |
4abb08c2 SW |
1010 | if (!conf_data_saved) { |
1011 | kfree(private->conf_data); | |
1012 | private->conf_data = conf_data; | |
1013 | private->conf_len = conf_len; | |
1014 | if (dasd_eckd_identify_conf_parts(private)) { | |
1015 | private->conf_data = NULL; | |
1016 | private->conf_len = 0; | |
1017 | kfree(conf_data); | |
1018 | continue; | |
1019 | } | |
1da177e4 LT |
1020 | conf_data_saved++; |
1021 | } | |
4abb08c2 | 1022 | switch (dasd_eckd_path_access(conf_data, conf_len)) { |
1da177e4 LT |
1023 | case 0x02: |
1024 | path_data->npm |= lpm; | |
1025 | break; | |
1026 | case 0x03: | |
1027 | path_data->ppm |= lpm; | |
1028 | break; | |
1029 | } | |
a4d26c6a | 1030 | path_data->opm |= lpm; |
4abb08c2 SW |
1031 | if (conf_data != private->conf_data) |
1032 | kfree(conf_data); | |
1da177e4 LT |
1033 | } |
1034 | } | |
1035 | return 0; | |
1036 | } | |
1037 | ||
a4d26c6a SW |
1038 | static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) |
1039 | { | |
1040 | struct dasd_eckd_private *private; | |
1041 | int mdc; | |
1042 | u32 fcx_max_data; | |
1043 | ||
1044 | private = (struct dasd_eckd_private *) device->private; | |
1045 | if (private->fcx_max_data) { | |
1046 | mdc = ccw_device_get_mdc(device->cdev, lpm); | |
1047 | if ((mdc < 0)) { | |
1048 | dev_warn(&device->cdev->dev, | |
1049 | "Detecting the maximum data size for zHPF " | |
1050 | "requests failed (rc=%d) for a new path %x\n", | |
1051 | mdc, lpm); | |
1052 | return mdc; | |
1053 | } | |
1054 | fcx_max_data = mdc * FCX_MAX_DATA_FACTOR; | |
1055 | if (fcx_max_data < private->fcx_max_data) { | |
1056 | dev_warn(&device->cdev->dev, | |
1057 | "The maximum data size for zHPF requests %u " | |
1058 | "on a new path %x is below the active maximum " | |
1059 | "%u\n", fcx_max_data, lpm, | |
1060 | private->fcx_max_data); | |
1061 | return -EACCES; | |
1062 | } | |
1063 | } | |
1064 | return 0; | |
1065 | } | |
1066 | ||
1067 | static void do_path_verification_work(struct work_struct *work) | |
1068 | { | |
1069 | struct path_verification_work_data *data; | |
1070 | struct dasd_device *device; | |
1071 | __u8 lpm, opm, npm, ppm, epm; | |
1072 | unsigned long flags; | |
1073 | int rc; | |
1074 | ||
1075 | data = container_of(work, struct path_verification_work_data, worker); | |
1076 | device = data->device; | |
1077 | ||
1078 | opm = 0; | |
1079 | npm = 0; | |
1080 | ppm = 0; | |
1081 | epm = 0; | |
1082 | for (lpm = 0x80; lpm; lpm >>= 1) { | |
1083 | if (lpm & data->tbvpm) { | |
1084 | memset(data->rcd_buffer, 0, sizeof(data->rcd_buffer)); | |
1085 | memset(&data->cqr, 0, sizeof(data->cqr)); | |
1086 | data->cqr.cpaddr = &data->ccw; | |
1087 | rc = dasd_eckd_read_conf_immediately(device, &data->cqr, | |
1088 | data->rcd_buffer, | |
1089 | lpm); | |
1090 | if (!rc) { | |
1091 | switch (dasd_eckd_path_access(data->rcd_buffer, | |
1092 | DASD_ECKD_RCD_DATA_SIZE)) { | |
1093 | case 0x02: | |
1094 | npm |= lpm; | |
1095 | break; | |
1096 | case 0x03: | |
1097 | ppm |= lpm; | |
1098 | break; | |
1099 | } | |
1100 | opm |= lpm; | |
1101 | } else if (rc == -EOPNOTSUPP) { | |
1102 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
1103 | "path verification: No configuration " | |
1104 | "data retrieved"); | |
1105 | opm |= lpm; | |
1106 | } else if (rc == -EAGAIN) { | |
1107 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
1108 | "path verification: device is stopped," | |
1109 | " try again later"); | |
1110 | epm |= lpm; | |
1111 | } else { | |
1112 | dev_warn(&device->cdev->dev, | |
1113 | "Reading device feature codes failed " | |
1114 | "(rc=%d) for new path %x\n", rc, lpm); | |
1115 | continue; | |
1116 | } | |
1117 | if (verify_fcx_max_data(device, lpm)) { | |
1118 | opm &= ~lpm; | |
1119 | npm &= ~lpm; | |
1120 | ppm &= ~lpm; | |
1121 | } | |
1122 | } | |
1123 | } | |
1124 | /* | |
1125 | * There is a small chance that a path is lost again between | |
1126 | * above path verification and the following modification of | |
1127 | * the device opm mask. We could avoid that race here by using | |
1128 | * yet another path mask, but we rather deal with this unlikely | |
1129 | * situation in dasd_start_IO. | |
1130 | */ | |
1131 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); | |
1132 | if (!device->path_data.opm && opm) { | |
1133 | device->path_data.opm = opm; | |
1134 | dasd_generic_path_operational(device); | |
1135 | } else | |
1136 | device->path_data.opm |= opm; | |
1137 | device->path_data.npm |= npm; | |
1138 | device->path_data.ppm |= ppm; | |
1139 | device->path_data.tbvpm |= epm; | |
1140 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); | |
1141 | ||
1142 | dasd_put_device(device); | |
1143 | if (data->isglobal) | |
1144 | mutex_unlock(&dasd_path_verification_mutex); | |
1145 | else | |
1146 | kfree(data); | |
1147 | } | |
1148 | ||
1149 | static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm) | |
1150 | { | |
1151 | struct path_verification_work_data *data; | |
1152 | ||
1153 | data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); | |
1154 | if (!data) { | |
1155 | if (mutex_trylock(&dasd_path_verification_mutex)) { | |
1156 | data = path_verification_worker; | |
1157 | data->isglobal = 1; | |
1158 | } else | |
1159 | return -ENOMEM; | |
1160 | } else { | |
1161 | memset(data, 0, sizeof(*data)); | |
1162 | data->isglobal = 0; | |
1163 | } | |
1164 | INIT_WORK(&data->worker, do_path_verification_work); | |
1165 | dasd_get_device(device); | |
1166 | data->device = device; | |
1167 | data->tbvpm = lpm; | |
1168 | schedule_work(&data->worker); | |
1169 | return 0; | |
1170 | } | |
1171 | ||
8e09f215 SW |
1172 | static int dasd_eckd_read_features(struct dasd_device *device) |
1173 | { | |
1174 | struct dasd_psf_prssd_data *prssdp; | |
1175 | struct dasd_rssd_features *features; | |
1176 | struct dasd_ccw_req *cqr; | |
1177 | struct ccw1 *ccw; | |
1178 | int rc; | |
1179 | struct dasd_eckd_private *private; | |
1180 | ||
1181 | private = (struct dasd_eckd_private *) device->private; | |
68d1e5f0 | 1182 | memset(&private->features, 0, sizeof(struct dasd_rssd_features)); |
68b781fe | 1183 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, |
8e09f215 SW |
1184 | (sizeof(struct dasd_psf_prssd_data) + |
1185 | sizeof(struct dasd_rssd_features)), | |
1186 | device); | |
1187 | if (IS_ERR(cqr)) { | |
b8ed5dd5 SH |
1188 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " |
1189 | "allocate initialization request"); | |
8e09f215 SW |
1190 | return PTR_ERR(cqr); |
1191 | } | |
1192 | cqr->startdev = device; | |
1193 | cqr->memdev = device; | |
1194 | cqr->block = NULL; | |
eb6e199b | 1195 | cqr->retries = 256; |
8e09f215 SW |
1196 | cqr->expires = 10 * HZ; |
1197 | ||
1198 | /* Prepare for Read Subsystem Data */ | |
1199 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
1200 | memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); | |
1201 | prssdp->order = PSF_ORDER_PRSSD; | |
1202 | prssdp->suborder = 0x41; /* Read Feature Codes */ | |
1203 | /* all other bytes of prssdp must be zero */ | |
1204 | ||
1205 | ccw = cqr->cpaddr; | |
1206 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
1207 | ccw->count = sizeof(struct dasd_psf_prssd_data); | |
1208 | ccw->flags |= CCW_FLAG_CC; | |
1209 | ccw->cda = (__u32)(addr_t) prssdp; | |
1210 | ||
1211 | /* Read Subsystem Data - feature codes */ | |
1212 | features = (struct dasd_rssd_features *) (prssdp + 1); | |
1213 | memset(features, 0, sizeof(struct dasd_rssd_features)); | |
1214 | ||
1215 | ccw++; | |
1216 | ccw->cmd_code = DASD_ECKD_CCW_RSSD; | |
1217 | ccw->count = sizeof(struct dasd_rssd_features); | |
1218 | ccw->cda = (__u32)(addr_t) features; | |
1219 | ||
1220 | cqr->buildclk = get_clock(); | |
1221 | cqr->status = DASD_CQR_FILLED; | |
1222 | rc = dasd_sleep_on(cqr); | |
1223 | if (rc == 0) { | |
1224 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
1225 | features = (struct dasd_rssd_features *) (prssdp + 1); | |
1226 | memcpy(&private->features, features, | |
1227 | sizeof(struct dasd_rssd_features)); | |
68d1e5f0 SW |
1228 | } else |
1229 | dev_warn(&device->cdev->dev, "Reading device feature codes" | |
1230 | " failed with rc=%d\n", rc); | |
8e09f215 SW |
1231 | dasd_sfree_request(cqr, cqr->memdev); |
1232 | return rc; | |
1233 | } | |
1234 | ||
1235 | ||
40545573 HH |
1236 | /* |
1237 | * Build CP for Perform Subsystem Function - SSC. | |
1238 | */ | |
f3eb5384 SW |
1239 | static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, |
1240 | int enable_pav) | |
40545573 | 1241 | { |
8e09f215 SW |
1242 | struct dasd_ccw_req *cqr; |
1243 | struct dasd_psf_ssc_data *psf_ssc_data; | |
1244 | struct ccw1 *ccw; | |
40545573 | 1245 | |
68b781fe | 1246 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , |
40545573 HH |
1247 | sizeof(struct dasd_psf_ssc_data), |
1248 | device); | |
1249 | ||
8e09f215 | 1250 | if (IS_ERR(cqr)) { |
fc19f381 | 1251 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
40545573 | 1252 | "Could not allocate PSF-SSC request"); |
8e09f215 SW |
1253 | return cqr; |
1254 | } | |
1255 | psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; | |
1256 | psf_ssc_data->order = PSF_ORDER_SSC; | |
626350b6 | 1257 | psf_ssc_data->suborder = 0xc0; |
f3eb5384 | 1258 | if (enable_pav) { |
626350b6 | 1259 | psf_ssc_data->suborder |= 0x08; |
f3eb5384 SW |
1260 | psf_ssc_data->reserved[0] = 0x88; |
1261 | } | |
8e09f215 SW |
1262 | ccw = cqr->cpaddr; |
1263 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
1264 | ccw->cda = (__u32)(addr_t)psf_ssc_data; | |
1265 | ccw->count = 66; | |
1266 | ||
1267 | cqr->startdev = device; | |
1268 | cqr->memdev = device; | |
1269 | cqr->block = NULL; | |
eb6e199b | 1270 | cqr->retries = 256; |
8e09f215 SW |
1271 | cqr->expires = 10*HZ; |
1272 | cqr->buildclk = get_clock(); | |
1273 | cqr->status = DASD_CQR_FILLED; | |
1274 | return cqr; | |
40545573 HH |
1275 | } |
1276 | ||
1277 | /* | |
1278 | * Perform Subsystem Function. | |
1279 | * It is necessary to trigger CIO for channel revalidation since this | |
1280 | * call might change behaviour of DASD devices. | |
1281 | */ | |
1282 | static int | |
f3eb5384 | 1283 | dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav) |
40545573 | 1284 | { |
8e09f215 SW |
1285 | struct dasd_ccw_req *cqr; |
1286 | int rc; | |
1287 | ||
f3eb5384 | 1288 | cqr = dasd_eckd_build_psf_ssc(device, enable_pav); |
8e09f215 SW |
1289 | if (IS_ERR(cqr)) |
1290 | return PTR_ERR(cqr); | |
1291 | ||
1292 | rc = dasd_sleep_on(cqr); | |
1293 | if (!rc) | |
1294 | /* trigger CIO to reprobe devices */ | |
1295 | css_schedule_reprobe(); | |
1296 | dasd_sfree_request(cqr, cqr->memdev); | |
1297 | return rc; | |
40545573 HH |
1298 | } |
1299 | ||
1300 | /* | |
1301 | * Valide storage server of current device. | |
1302 | */ | |
f4ac1d02 | 1303 | static void dasd_eckd_validate_server(struct dasd_device *device) |
40545573 HH |
1304 | { |
1305 | int rc; | |
8e09f215 | 1306 | struct dasd_eckd_private *private; |
f3eb5384 | 1307 | int enable_pav; |
40545573 | 1308 | |
40545573 | 1309 | if (dasd_nopav || MACHINE_IS_VM) |
f3eb5384 SW |
1310 | enable_pav = 0; |
1311 | else | |
1312 | enable_pav = 1; | |
1313 | rc = dasd_eckd_psf_ssc(device, enable_pav); | |
eb6e199b | 1314 | |
8e79a441 HH |
1315 | /* may be requested feature is not available on server, |
1316 | * therefore just report error and go ahead */ | |
8e09f215 | 1317 | private = (struct dasd_eckd_private *) device->private; |
b8ed5dd5 SH |
1318 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " |
1319 | "returned rc=%d", private->uid.ssid, rc); | |
40545573 HH |
1320 | } |
1321 | ||
ef19298b SW |
1322 | static u32 get_fcx_max_data(struct dasd_device *device) |
1323 | { | |
1324 | #if defined(CONFIG_64BIT) | |
1325 | int tpm, mdc; | |
1326 | int fcx_in_css, fcx_in_gneq, fcx_in_features; | |
1327 | struct dasd_eckd_private *private; | |
1328 | ||
1329 | if (dasd_nofcx) | |
1330 | return 0; | |
1331 | /* is transport mode supported? */ | |
1332 | private = (struct dasd_eckd_private *) device->private; | |
1333 | fcx_in_css = css_general_characteristics.fcx; | |
1334 | fcx_in_gneq = private->gneq->reserved2[7] & 0x04; | |
1335 | fcx_in_features = private->features.feature[40] & 0x80; | |
1336 | tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; | |
1337 | ||
1338 | if (!tpm) | |
1339 | return 0; | |
1340 | ||
1341 | mdc = ccw_device_get_mdc(device->cdev, 0); | |
1342 | if (mdc < 0) { | |
1343 | dev_warn(&device->cdev->dev, "Detecting the maximum supported" | |
1344 | " data size for zHPF requests failed\n"); | |
1345 | return 0; | |
1346 | } else | |
1347 | return mdc * FCX_MAX_DATA_FACTOR; | |
1348 | #else | |
1349 | return 0; | |
1350 | #endif | |
1351 | } | |
1352 | ||
3d052595 HH |
1353 | /* |
1354 | * Check device characteristics. | |
1355 | * If the device is accessible using ECKD discipline, the device is enabled. | |
1356 | */ | |
1da177e4 LT |
1357 | static int |
1358 | dasd_eckd_check_characteristics(struct dasd_device *device) | |
1359 | { | |
1360 | struct dasd_eckd_private *private; | |
8e09f215 | 1361 | struct dasd_block *block; |
2dedf0d9 | 1362 | struct dasd_uid temp_uid; |
7c8faa86 | 1363 | int is_known, rc, i; |
33b62a30 | 1364 | int readonly; |
7c8faa86 | 1365 | unsigned long value; |
1da177e4 | 1366 | |
454e1fa1 PO |
1367 | if (!ccw_device_is_pathgroup(device->cdev)) { |
1368 | dev_warn(&device->cdev->dev, | |
1369 | "A channel path group could not be established\n"); | |
1370 | return -EIO; | |
1371 | } | |
1372 | if (!ccw_device_is_multipath(device->cdev)) { | |
1373 | dev_info(&device->cdev->dev, | |
1374 | "The DASD is not operating in multipath mode\n"); | |
1375 | } | |
1da177e4 | 1376 | private = (struct dasd_eckd_private *) device->private; |
92636b15 SO |
1377 | if (!private) { |
1378 | private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); | |
1379 | if (!private) { | |
fc19f381 SH |
1380 | dev_warn(&device->cdev->dev, |
1381 | "Allocating memory for private DASD data " | |
1382 | "failed\n"); | |
1da177e4 LT |
1383 | return -ENOMEM; |
1384 | } | |
1da177e4 | 1385 | device->private = (void *) private; |
92636b15 SO |
1386 | } else { |
1387 | memset(private, 0, sizeof(*private)); | |
1da177e4 LT |
1388 | } |
1389 | /* Invalidate status of initial analysis. */ | |
1390 | private->init_cqr_status = -1; | |
1391 | /* Set default cache operations. */ | |
1392 | private->attrib.operation = DASD_NORMAL_CACHE; | |
1393 | private->attrib.nr_cyl = 0; | |
1394 | ||
40545573 HH |
1395 | /* Read Configuration Data */ |
1396 | rc = dasd_eckd_read_conf(device); | |
1397 | if (rc) | |
8e09f215 | 1398 | goto out_err1; |
40545573 | 1399 | |
7c8faa86 SH |
1400 | /* set default timeout */ |
1401 | device->default_expires = DASD_EXPIRES; | |
1402 | if (private->gneq) { | |
1403 | value = 1; | |
1404 | for (i = 0; i < private->gneq->timeout.value; i++) | |
1405 | value = 10 * value; | |
1406 | value = value * private->gneq->timeout.number; | |
1407 | /* do not accept useless values */ | |
1408 | if (value != 0 && value <= DASD_EXPIRES_MAX) | |
1409 | device->default_expires = value; | |
1410 | } | |
1411 | ||
2dedf0d9 SH |
1412 | /* Generate device unique id */ |
1413 | rc = dasd_eckd_generate_uid(device); | |
40545573 | 1414 | if (rc) |
8e09f215 | 1415 | goto out_err1; |
8e09f215 | 1416 | |
2dedf0d9 SH |
1417 | dasd_eckd_get_uid(device, &temp_uid); |
1418 | if (temp_uid.type == UA_BASE_DEVICE) { | |
8e09f215 SW |
1419 | block = dasd_alloc_block(); |
1420 | if (IS_ERR(block)) { | |
b8ed5dd5 SH |
1421 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", |
1422 | "could not allocate dasd " | |
1423 | "block structure"); | |
8e09f215 SW |
1424 | rc = PTR_ERR(block); |
1425 | goto out_err1; | |
1426 | } | |
1427 | device->block = block; | |
1428 | block->base = device; | |
1429 | } | |
1430 | ||
1431 | /* register lcu with alias handling, enable PAV if this is a new lcu */ | |
1432 | is_known = dasd_alias_make_device_known_to_lcu(device); | |
1433 | if (is_known < 0) { | |
1434 | rc = is_known; | |
1435 | goto out_err2; | |
1436 | } | |
f4ac1d02 | 1437 | /* |
817f2c84 | 1438 | * dasd_eckd_validate_server is done on the first device that |
f4ac1d02 SW |
1439 | * is found for an LCU. All later other devices have to wait |
1440 | * for it, so they will read the correct feature codes. | |
1441 | */ | |
8e09f215 | 1442 | if (!is_known) { |
f4ac1d02 SW |
1443 | dasd_eckd_validate_server(device); |
1444 | dasd_alias_lcu_setup_complete(device); | |
1445 | } else | |
1446 | dasd_alias_wait_for_lcu_setup(device); | |
1447 | ||
1448 | /* device may report different configuration data after LCU setup */ | |
1449 | rc = dasd_eckd_read_conf(device); | |
1450 | if (rc) | |
1451 | goto out_err3; | |
8e09f215 SW |
1452 | |
1453 | /* Read Feature Codes */ | |
68d1e5f0 | 1454 | dasd_eckd_read_features(device); |
40545573 | 1455 | |
1da177e4 | 1456 | /* Read Device Characteristics */ |
68b781fe SH |
1457 | rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, |
1458 | &private->rdc_data, 64); | |
8e09f215 | 1459 | if (rc) { |
b8ed5dd5 SH |
1460 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, |
1461 | "Read device characteristic failed, rc=%d", rc); | |
8e09f215 SW |
1462 | goto out_err3; |
1463 | } | |
817f2c84 | 1464 | /* find the valid cylinder size */ |
b44b0ab3 SW |
1465 | if (private->rdc_data.no_cyl == LV_COMPAT_CYL && |
1466 | private->rdc_data.long_no_cyl) | |
1467 | private->real_cyl = private->rdc_data.long_no_cyl; | |
1468 | else | |
1469 | private->real_cyl = private->rdc_data.no_cyl; | |
1470 | ||
ef19298b SW |
1471 | private->fcx_max_data = get_fcx_max_data(device); |
1472 | ||
33b62a30 SW |
1473 | readonly = dasd_device_is_ro(device); |
1474 | if (readonly) | |
1475 | set_bit(DASD_FLAG_DEVICE_RO, &device->flags); | |
1476 | ||
fc19f381 | 1477 | dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " |
33b62a30 | 1478 | "with %d cylinders, %d heads, %d sectors%s\n", |
fc19f381 SH |
1479 | private->rdc_data.dev_type, |
1480 | private->rdc_data.dev_model, | |
1481 | private->rdc_data.cu_type, | |
1482 | private->rdc_data.cu_model.model, | |
92636b15 | 1483 | private->real_cyl, |
fc19f381 | 1484 | private->rdc_data.trk_per_cyl, |
33b62a30 SW |
1485 | private->rdc_data.sec_per_trk, |
1486 | readonly ? ", read-only device" : ""); | |
8e09f215 SW |
1487 | return 0; |
1488 | ||
1489 | out_err3: | |
1490 | dasd_alias_disconnect_device_from_lcu(device); | |
1491 | out_err2: | |
1492 | dasd_free_block(device->block); | |
1493 | device->block = NULL; | |
1494 | out_err1: | |
4abb08c2 | 1495 | kfree(private->conf_data); |
8e09f215 SW |
1496 | kfree(device->private); |
1497 | device->private = NULL; | |
3d052595 | 1498 | return rc; |
1da177e4 LT |
1499 | } |
1500 | ||
8e09f215 SW |
1501 | static void dasd_eckd_uncheck_device(struct dasd_device *device) |
1502 | { | |
4abb08c2 SW |
1503 | struct dasd_eckd_private *private; |
1504 | ||
1505 | private = (struct dasd_eckd_private *) device->private; | |
8e09f215 | 1506 | dasd_alias_disconnect_device_from_lcu(device); |
4abb08c2 SW |
1507 | private->ned = NULL; |
1508 | private->sneq = NULL; | |
1509 | private->vdsneq = NULL; | |
1510 | private->gneq = NULL; | |
1511 | private->conf_len = 0; | |
1512 | kfree(private->conf_data); | |
1513 | private->conf_data = NULL; | |
8e09f215 SW |
1514 | } |
1515 | ||
1da177e4 LT |
1516 | static struct dasd_ccw_req * |
1517 | dasd_eckd_analysis_ccw(struct dasd_device *device) | |
1518 | { | |
1519 | struct dasd_eckd_private *private; | |
1520 | struct eckd_count *count_data; | |
1521 | struct LO_eckd_data *LO_data; | |
1522 | struct dasd_ccw_req *cqr; | |
1523 | struct ccw1 *ccw; | |
1524 | int cplength, datasize; | |
1525 | int i; | |
1526 | ||
1527 | private = (struct dasd_eckd_private *) device->private; | |
1528 | ||
1529 | cplength = 8; | |
1530 | datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); | |
68b781fe | 1531 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); |
1da177e4 LT |
1532 | if (IS_ERR(cqr)) |
1533 | return cqr; | |
1534 | ccw = cqr->cpaddr; | |
1535 | /* Define extent for the first 3 tracks. */ | |
1536 | define_extent(ccw++, cqr->data, 0, 2, | |
1537 | DASD_ECKD_CCW_READ_COUNT, device); | |
8e09f215 | 1538 | LO_data = cqr->data + sizeof(struct DE_eckd_data); |
1da177e4 LT |
1539 | /* Locate record for the first 4 records on track 0. */ |
1540 | ccw[-1].flags |= CCW_FLAG_CC; | |
1541 | locate_record(ccw++, LO_data++, 0, 0, 4, | |
1542 | DASD_ECKD_CCW_READ_COUNT, device, 0); | |
1543 | ||
1544 | count_data = private->count_area; | |
1545 | for (i = 0; i < 4; i++) { | |
1546 | ccw[-1].flags |= CCW_FLAG_CC; | |
1547 | ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; | |
1548 | ccw->flags = 0; | |
1549 | ccw->count = 8; | |
1550 | ccw->cda = (__u32)(addr_t) count_data; | |
1551 | ccw++; | |
1552 | count_data++; | |
1553 | } | |
1554 | ||
1555 | /* Locate record for the first record on track 2. */ | |
1556 | ccw[-1].flags |= CCW_FLAG_CC; | |
1557 | locate_record(ccw++, LO_data++, 2, 0, 1, | |
1558 | DASD_ECKD_CCW_READ_COUNT, device, 0); | |
1559 | /* Read count ccw. */ | |
1560 | ccw[-1].flags |= CCW_FLAG_CC; | |
1561 | ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; | |
1562 | ccw->flags = 0; | |
1563 | ccw->count = 8; | |
1564 | ccw->cda = (__u32)(addr_t) count_data; | |
1565 | ||
8e09f215 SW |
1566 | cqr->block = NULL; |
1567 | cqr->startdev = device; | |
1568 | cqr->memdev = device; | |
eb6e199b | 1569 | cqr->retries = 255; |
1da177e4 LT |
1570 | cqr->buildclk = get_clock(); |
1571 | cqr->status = DASD_CQR_FILLED; | |
1572 | return cqr; | |
1573 | } | |
1574 | ||
eb6e199b SW |
1575 | /* differentiate between 'no record found' and any other error */ |
1576 | static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) | |
1577 | { | |
1578 | char *sense; | |
1579 | if (init_cqr->status == DASD_CQR_DONE) | |
1580 | return INIT_CQR_OK; | |
1581 | else if (init_cqr->status == DASD_CQR_NEED_ERP || | |
1582 | init_cqr->status == DASD_CQR_FAILED) { | |
1583 | sense = dasd_get_sense(&init_cqr->irb); | |
1584 | if (sense && (sense[1] & SNS1_NO_REC_FOUND)) | |
1585 | return INIT_CQR_UNFORMATTED; | |
1586 | else | |
1587 | return INIT_CQR_ERROR; | |
1588 | } else | |
1589 | return INIT_CQR_ERROR; | |
1590 | } | |
1591 | ||
1da177e4 LT |
1592 | /* |
1593 | * This is the callback function for the init_analysis cqr. It saves | |
1594 | * the status of the initial analysis ccw before it frees it and kicks | |
1595 | * the device to continue the startup sequence. This will call | |
1596 | * dasd_eckd_do_analysis again (if the devices has not been marked | |
1597 | * for deletion in the meantime). | |
1598 | */ | |
eb6e199b SW |
1599 | static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, |
1600 | void *data) | |
1da177e4 LT |
1601 | { |
1602 | struct dasd_eckd_private *private; | |
1603 | struct dasd_device *device; | |
1604 | ||
8e09f215 | 1605 | device = init_cqr->startdev; |
1da177e4 | 1606 | private = (struct dasd_eckd_private *) device->private; |
eb6e199b | 1607 | private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); |
1da177e4 LT |
1608 | dasd_sfree_request(init_cqr, device); |
1609 | dasd_kick_device(device); | |
1610 | } | |
1611 | ||
eb6e199b | 1612 | static int dasd_eckd_start_analysis(struct dasd_block *block) |
1da177e4 LT |
1613 | { |
1614 | struct dasd_eckd_private *private; | |
1615 | struct dasd_ccw_req *init_cqr; | |
1616 | ||
8e09f215 SW |
1617 | private = (struct dasd_eckd_private *) block->base->private; |
1618 | init_cqr = dasd_eckd_analysis_ccw(block->base); | |
1da177e4 LT |
1619 | if (IS_ERR(init_cqr)) |
1620 | return PTR_ERR(init_cqr); | |
1621 | init_cqr->callback = dasd_eckd_analysis_callback; | |
1622 | init_cqr->callback_data = NULL; | |
1623 | init_cqr->expires = 5*HZ; | |
eb6e199b SW |
1624 | /* first try without ERP, so we can later handle unformatted |
1625 | * devices as special case | |
1626 | */ | |
1627 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); | |
1628 | init_cqr->retries = 0; | |
1da177e4 LT |
1629 | dasd_add_request_head(init_cqr); |
1630 | return -EAGAIN; | |
1631 | } | |
1632 | ||
eb6e199b | 1633 | static int dasd_eckd_end_analysis(struct dasd_block *block) |
1da177e4 | 1634 | { |
8e09f215 | 1635 | struct dasd_device *device; |
1da177e4 LT |
1636 | struct dasd_eckd_private *private; |
1637 | struct eckd_count *count_area; | |
1638 | unsigned int sb, blk_per_trk; | |
1639 | int status, i; | |
eb6e199b | 1640 | struct dasd_ccw_req *init_cqr; |
1da177e4 | 1641 | |
8e09f215 | 1642 | device = block->base; |
1da177e4 LT |
1643 | private = (struct dasd_eckd_private *) device->private; |
1644 | status = private->init_cqr_status; | |
1645 | private->init_cqr_status = -1; | |
eb6e199b SW |
1646 | if (status == INIT_CQR_ERROR) { |
1647 | /* try again, this time with full ERP */ | |
1648 | init_cqr = dasd_eckd_analysis_ccw(device); | |
1649 | dasd_sleep_on(init_cqr); | |
1650 | status = dasd_eckd_analysis_evaluation(init_cqr); | |
1651 | dasd_sfree_request(init_cqr, device); | |
1652 | } | |
1653 | ||
e4dbb0f2 SH |
1654 | if (device->features & DASD_FEATURE_USERAW) { |
1655 | block->bp_block = DASD_RAW_BLOCKSIZE; | |
1656 | blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; | |
1657 | block->s2b_shift = 3; | |
1658 | goto raw; | |
1659 | } | |
1660 | ||
eb6e199b SW |
1661 | if (status == INIT_CQR_UNFORMATTED) { |
1662 | dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); | |
1da177e4 | 1663 | return -EMEDIUMTYPE; |
eb6e199b SW |
1664 | } else if (status == INIT_CQR_ERROR) { |
1665 | dev_err(&device->cdev->dev, | |
1666 | "Detecting the DASD disk layout failed because " | |
1667 | "of an I/O error\n"); | |
1668 | return -EIO; | |
1da177e4 LT |
1669 | } |
1670 | ||
1671 | private->uses_cdl = 1; | |
1da177e4 LT |
1672 | /* Check Track 0 for Compatible Disk Layout */ |
1673 | count_area = NULL; | |
1674 | for (i = 0; i < 3; i++) { | |
1675 | if (private->count_area[i].kl != 4 || | |
1676 | private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) { | |
1677 | private->uses_cdl = 0; | |
1678 | break; | |
1679 | } | |
1680 | } | |
1681 | if (i == 3) | |
1682 | count_area = &private->count_area[4]; | |
1683 | ||
1684 | if (private->uses_cdl == 0) { | |
1685 | for (i = 0; i < 5; i++) { | |
1686 | if ((private->count_area[i].kl != 0) || | |
1687 | (private->count_area[i].dl != | |
1688 | private->count_area[0].dl)) | |
1689 | break; | |
1690 | } | |
1691 | if (i == 5) | |
1692 | count_area = &private->count_area[0]; | |
1693 | } else { | |
1694 | if (private->count_area[3].record == 1) | |
fc19f381 SH |
1695 | dev_warn(&device->cdev->dev, |
1696 | "Track 0 has no records following the VTOC\n"); | |
1da177e4 | 1697 | } |
e4dbb0f2 | 1698 | |
1da177e4 LT |
1699 | if (count_area != NULL && count_area->kl == 0) { |
1700 | /* we found notthing violating our disk layout */ | |
1701 | if (dasd_check_blocksize(count_area->dl) == 0) | |
8e09f215 | 1702 | block->bp_block = count_area->dl; |
1da177e4 | 1703 | } |
8e09f215 | 1704 | if (block->bp_block == 0) { |
fc19f381 SH |
1705 | dev_warn(&device->cdev->dev, |
1706 | "The disk layout of the DASD is not supported\n"); | |
1da177e4 LT |
1707 | return -EMEDIUMTYPE; |
1708 | } | |
8e09f215 SW |
1709 | block->s2b_shift = 0; /* bits to shift 512 to get a block */ |
1710 | for (sb = 512; sb < block->bp_block; sb = sb << 1) | |
1711 | block->s2b_shift++; | |
1da177e4 | 1712 | |
8e09f215 | 1713 | blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); |
e4dbb0f2 SH |
1714 | |
1715 | raw: | |
b44b0ab3 | 1716 | block->blocks = (private->real_cyl * |
1da177e4 LT |
1717 | private->rdc_data.trk_per_cyl * |
1718 | blk_per_trk); | |
1719 | ||
fc19f381 SH |
1720 | dev_info(&device->cdev->dev, |
1721 | "DASD with %d KB/block, %d KB total size, %d KB/track, " | |
1722 | "%s\n", (block->bp_block >> 10), | |
1723 | ((private->real_cyl * | |
1724 | private->rdc_data.trk_per_cyl * | |
1725 | blk_per_trk * (block->bp_block >> 9)) >> 1), | |
1726 | ((blk_per_trk * block->bp_block) >> 10), | |
1727 | private->uses_cdl ? | |
1728 | "compatible disk layout" : "linux disk layout"); | |
1da177e4 LT |
1729 | |
1730 | return 0; | |
1731 | } | |
1732 | ||
8e09f215 | 1733 | static int dasd_eckd_do_analysis(struct dasd_block *block) |
1da177e4 LT |
1734 | { |
1735 | struct dasd_eckd_private *private; | |
1736 | ||
8e09f215 | 1737 | private = (struct dasd_eckd_private *) block->base->private; |
1da177e4 | 1738 | if (private->init_cqr_status < 0) |
8e09f215 | 1739 | return dasd_eckd_start_analysis(block); |
1da177e4 | 1740 | else |
8e09f215 | 1741 | return dasd_eckd_end_analysis(block); |
1da177e4 LT |
1742 | } |
1743 | ||
8e09f215 SW |
1744 | static int dasd_eckd_ready_to_online(struct dasd_device *device) |
1745 | { | |
1746 | return dasd_alias_add_device(device); | |
1747 | }; | |
1748 | ||
1749 | static int dasd_eckd_online_to_ready(struct dasd_device *device) | |
1750 | { | |
501183f2 | 1751 | cancel_work_sync(&device->reload_device); |
8e09f215 SW |
1752 | return dasd_alias_remove_device(device); |
1753 | }; | |
1754 | ||
1da177e4 | 1755 | static int |
8e09f215 | 1756 | dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) |
1da177e4 LT |
1757 | { |
1758 | struct dasd_eckd_private *private; | |
1759 | ||
8e09f215 SW |
1760 | private = (struct dasd_eckd_private *) block->base->private; |
1761 | if (dasd_check_blocksize(block->bp_block) == 0) { | |
1da177e4 | 1762 | geo->sectors = recs_per_track(&private->rdc_data, |
8e09f215 | 1763 | 0, block->bp_block); |
1da177e4 LT |
1764 | } |
1765 | geo->cylinders = private->rdc_data.no_cyl; | |
1766 | geo->heads = private->rdc_data.trk_per_cyl; | |
1767 | return 0; | |
1768 | } | |
1769 | ||
1770 | static struct dasd_ccw_req * | |
1771 | dasd_eckd_format_device(struct dasd_device * device, | |
1772 | struct format_data_t * fdata) | |
1773 | { | |
1774 | struct dasd_eckd_private *private; | |
1775 | struct dasd_ccw_req *fcp; | |
1776 | struct eckd_count *ect; | |
1777 | struct ccw1 *ccw; | |
1778 | void *data; | |
b44b0ab3 SW |
1779 | int rpt; |
1780 | struct ch_t address; | |
1da177e4 LT |
1781 | int cplength, datasize; |
1782 | int i; | |
f9a28f7b JBJ |
1783 | int intensity = 0; |
1784 | int r0_perm; | |
1da177e4 LT |
1785 | |
1786 | private = (struct dasd_eckd_private *) device->private; | |
1787 | rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize); | |
b44b0ab3 SW |
1788 | set_ch_t(&address, |
1789 | fdata->start_unit / private->rdc_data.trk_per_cyl, | |
1790 | fdata->start_unit % private->rdc_data.trk_per_cyl); | |
1da177e4 LT |
1791 | |
1792 | /* Sanity checks. */ | |
1793 | if (fdata->start_unit >= | |
b44b0ab3 | 1794 | (private->real_cyl * private->rdc_data.trk_per_cyl)) { |
fc19f381 SH |
1795 | dev_warn(&device->cdev->dev, "Start track number %d used in " |
1796 | "formatting is too big\n", fdata->start_unit); | |
1da177e4 LT |
1797 | return ERR_PTR(-EINVAL); |
1798 | } | |
1799 | if (fdata->start_unit > fdata->stop_unit) { | |
fc19f381 SH |
1800 | dev_warn(&device->cdev->dev, "Start track %d used in " |
1801 | "formatting exceeds end track\n", fdata->start_unit); | |
1da177e4 LT |
1802 | return ERR_PTR(-EINVAL); |
1803 | } | |
1804 | if (dasd_check_blocksize(fdata->blksize) != 0) { | |
fc19f381 SH |
1805 | dev_warn(&device->cdev->dev, |
1806 | "The DASD cannot be formatted with block size %d\n", | |
1807 | fdata->blksize); | |
1da177e4 LT |
1808 | return ERR_PTR(-EINVAL); |
1809 | } | |
1810 | ||
1811 | /* | |
1812 | * fdata->intensity is a bit string that tells us what to do: | |
1813 | * Bit 0: write record zero | |
1814 | * Bit 1: write home address, currently not supported | |
1815 | * Bit 2: invalidate tracks | |
1816 | * Bit 3: use OS/390 compatible disk layout (cdl) | |
f9a28f7b | 1817 | * Bit 4: do not allow storage subsystem to modify record zero |
1da177e4 LT |
1818 | * Only some bit combinations do make sense. |
1819 | */ | |
f9a28f7b JBJ |
1820 | if (fdata->intensity & 0x10) { |
1821 | r0_perm = 0; | |
1822 | intensity = fdata->intensity & ~0x10; | |
1823 | } else { | |
1824 | r0_perm = 1; | |
1825 | intensity = fdata->intensity; | |
1826 | } | |
1827 | switch (intensity) { | |
1da177e4 LT |
1828 | case 0x00: /* Normal format */ |
1829 | case 0x08: /* Normal format, use cdl. */ | |
1830 | cplength = 2 + rpt; | |
1831 | datasize = sizeof(struct DE_eckd_data) + | |
1832 | sizeof(struct LO_eckd_data) + | |
1833 | rpt * sizeof(struct eckd_count); | |
1834 | break; | |
1835 | case 0x01: /* Write record zero and format track. */ | |
1836 | case 0x09: /* Write record zero and format track, use cdl. */ | |
1837 | cplength = 3 + rpt; | |
1838 | datasize = sizeof(struct DE_eckd_data) + | |
1839 | sizeof(struct LO_eckd_data) + | |
1840 | sizeof(struct eckd_count) + | |
1841 | rpt * sizeof(struct eckd_count); | |
1842 | break; | |
1843 | case 0x04: /* Invalidate track. */ | |
1844 | case 0x0c: /* Invalidate track, use cdl. */ | |
1845 | cplength = 3; | |
1846 | datasize = sizeof(struct DE_eckd_data) + | |
1847 | sizeof(struct LO_eckd_data) + | |
1848 | sizeof(struct eckd_count); | |
1849 | break; | |
1850 | default: | |
fc19f381 SH |
1851 | dev_warn(&device->cdev->dev, "An I/O control call used " |
1852 | "incorrect flags 0x%x\n", fdata->intensity); | |
1da177e4 LT |
1853 | return ERR_PTR(-EINVAL); |
1854 | } | |
1855 | /* Allocate the format ccw request. */ | |
68b781fe | 1856 | fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); |
1da177e4 LT |
1857 | if (IS_ERR(fcp)) |
1858 | return fcp; | |
1859 | ||
1860 | data = fcp->data; | |
1861 | ccw = fcp->cpaddr; | |
1862 | ||
f9a28f7b | 1863 | switch (intensity & ~0x08) { |
1da177e4 LT |
1864 | case 0x00: /* Normal format. */ |
1865 | define_extent(ccw++, (struct DE_eckd_data *) data, | |
1866 | fdata->start_unit, fdata->start_unit, | |
1867 | DASD_ECKD_CCW_WRITE_CKD, device); | |
f9a28f7b JBJ |
1868 | /* grant subsystem permission to format R0 */ |
1869 | if (r0_perm) | |
1870 | ((struct DE_eckd_data *)data)->ga_extended |= 0x04; | |
1da177e4 LT |
1871 | data += sizeof(struct DE_eckd_data); |
1872 | ccw[-1].flags |= CCW_FLAG_CC; | |
1873 | locate_record(ccw++, (struct LO_eckd_data *) data, | |
1874 | fdata->start_unit, 0, rpt, | |
1875 | DASD_ECKD_CCW_WRITE_CKD, device, | |
1876 | fdata->blksize); | |
1877 | data += sizeof(struct LO_eckd_data); | |
1878 | break; | |
1879 | case 0x01: /* Write record zero + format track. */ | |
1880 | define_extent(ccw++, (struct DE_eckd_data *) data, | |
1881 | fdata->start_unit, fdata->start_unit, | |
1882 | DASD_ECKD_CCW_WRITE_RECORD_ZERO, | |
1883 | device); | |
1884 | data += sizeof(struct DE_eckd_data); | |
1885 | ccw[-1].flags |= CCW_FLAG_CC; | |
1886 | locate_record(ccw++, (struct LO_eckd_data *) data, | |
1887 | fdata->start_unit, 0, rpt + 1, | |
1888 | DASD_ECKD_CCW_WRITE_RECORD_ZERO, device, | |
8e09f215 | 1889 | device->block->bp_block); |
1da177e4 LT |
1890 | data += sizeof(struct LO_eckd_data); |
1891 | break; | |
1892 | case 0x04: /* Invalidate track. */ | |
1893 | define_extent(ccw++, (struct DE_eckd_data *) data, | |
1894 | fdata->start_unit, fdata->start_unit, | |
1895 | DASD_ECKD_CCW_WRITE_CKD, device); | |
1896 | data += sizeof(struct DE_eckd_data); | |
1897 | ccw[-1].flags |= CCW_FLAG_CC; | |
1898 | locate_record(ccw++, (struct LO_eckd_data *) data, | |
1899 | fdata->start_unit, 0, 1, | |
1900 | DASD_ECKD_CCW_WRITE_CKD, device, 8); | |
1901 | data += sizeof(struct LO_eckd_data); | |
1902 | break; | |
1903 | } | |
f9a28f7b | 1904 | if (intensity & 0x01) { /* write record zero */ |
1da177e4 LT |
1905 | ect = (struct eckd_count *) data; |
1906 | data += sizeof(struct eckd_count); | |
b44b0ab3 SW |
1907 | ect->cyl = address.cyl; |
1908 | ect->head = address.head; | |
1da177e4 LT |
1909 | ect->record = 0; |
1910 | ect->kl = 0; | |
1911 | ect->dl = 8; | |
1912 | ccw[-1].flags |= CCW_FLAG_CC; | |
1913 | ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; | |
1914 | ccw->flags = CCW_FLAG_SLI; | |
1915 | ccw->count = 8; | |
1916 | ccw->cda = (__u32)(addr_t) ect; | |
1917 | ccw++; | |
1918 | } | |
f9a28f7b | 1919 | if ((intensity & ~0x08) & 0x04) { /* erase track */ |
1da177e4 LT |
1920 | ect = (struct eckd_count *) data; |
1921 | data += sizeof(struct eckd_count); | |
b44b0ab3 SW |
1922 | ect->cyl = address.cyl; |
1923 | ect->head = address.head; | |
1da177e4 LT |
1924 | ect->record = 1; |
1925 | ect->kl = 0; | |
1926 | ect->dl = 0; | |
1927 | ccw[-1].flags |= CCW_FLAG_CC; | |
1928 | ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; | |
1929 | ccw->flags = CCW_FLAG_SLI; | |
1930 | ccw->count = 8; | |
1931 | ccw->cda = (__u32)(addr_t) ect; | |
1932 | } else { /* write remaining records */ | |
1933 | for (i = 0; i < rpt; i++) { | |
1934 | ect = (struct eckd_count *) data; | |
1935 | data += sizeof(struct eckd_count); | |
b44b0ab3 SW |
1936 | ect->cyl = address.cyl; |
1937 | ect->head = address.head; | |
1da177e4 LT |
1938 | ect->record = i + 1; |
1939 | ect->kl = 0; | |
1940 | ect->dl = fdata->blksize; | |
1941 | /* Check for special tracks 0-1 when formatting CDL */ | |
f9a28f7b | 1942 | if ((intensity & 0x08) && |
1da177e4 LT |
1943 | fdata->start_unit == 0) { |
1944 | if (i < 3) { | |
1945 | ect->kl = 4; | |
1946 | ect->dl = sizes_trk0[i] - 4; | |
138c014d | 1947 | } |
1da177e4 | 1948 | } |
f9a28f7b | 1949 | if ((intensity & 0x08) && |
1da177e4 LT |
1950 | fdata->start_unit == 1) { |
1951 | ect->kl = 44; | |
1952 | ect->dl = LABEL_SIZE - 44; | |
1953 | } | |
1954 | ccw[-1].flags |= CCW_FLAG_CC; | |
1955 | ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; | |
1956 | ccw->flags = CCW_FLAG_SLI; | |
1957 | ccw->count = 8; | |
1958 | ccw->cda = (__u32)(addr_t) ect; | |
1959 | ccw++; | |
1960 | } | |
1961 | } | |
8e09f215 SW |
1962 | fcp->startdev = device; |
1963 | fcp->memdev = device; | |
eb6e199b | 1964 | fcp->retries = 256; |
1da177e4 LT |
1965 | fcp->buildclk = get_clock(); |
1966 | fcp->status = DASD_CQR_FILLED; | |
1967 | return fcp; | |
1968 | } | |
1969 | ||
8e09f215 | 1970 | static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) |
1da177e4 | 1971 | { |
8e09f215 SW |
1972 | cqr->status = DASD_CQR_FILLED; |
1973 | if (cqr->block && (cqr->startdev != cqr->block->base)) { | |
1974 | dasd_eckd_reset_ccw_to_base_io(cqr); | |
1975 | cqr->startdev = cqr->block->base; | |
a4d26c6a | 1976 | cqr->lpm = cqr->block->base->path_data.opm; |
1da177e4 | 1977 | } |
8e09f215 | 1978 | }; |
1da177e4 LT |
1979 | |
1980 | static dasd_erp_fn_t | |
1981 | dasd_eckd_erp_action(struct dasd_ccw_req * cqr) | |
1982 | { | |
8e09f215 | 1983 | struct dasd_device *device = (struct dasd_device *) cqr->startdev; |
1da177e4 LT |
1984 | struct ccw_device *cdev = device->cdev; |
1985 | ||
1986 | switch (cdev->id.cu_type) { | |
1987 | case 0x3990: | |
1988 | case 0x2105: | |
1989 | case 0x2107: | |
1990 | case 0x1750: | |
1991 | return dasd_3990_erp_action; | |
1992 | case 0x9343: | |
1993 | case 0x3880: | |
1994 | default: | |
1995 | return dasd_default_erp_action; | |
1996 | } | |
1997 | } | |
1998 | ||
1999 | static dasd_erp_fn_t | |
2000 | dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) | |
2001 | { | |
2002 | return dasd_default_erp_postaction; | |
2003 | } | |
2004 | ||
5a27e60d SW |
2005 | static void dasd_eckd_check_for_device_change(struct dasd_device *device, |
2006 | struct dasd_ccw_req *cqr, | |
2007 | struct irb *irb) | |
8e09f215 SW |
2008 | { |
2009 | char mask; | |
f3eb5384 | 2010 | char *sense = NULL; |
501183f2 | 2011 | struct dasd_eckd_private *private; |
8e09f215 | 2012 | |
501183f2 | 2013 | private = (struct dasd_eckd_private *) device->private; |
8e09f215 SW |
2014 | /* first of all check for state change pending interrupt */ |
2015 | mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; | |
f3eb5384 | 2016 | if ((scsw_dstat(&irb->scsw) & mask) == mask) { |
501183f2 SH |
2017 | /* for alias only and not in offline processing*/ |
2018 | if (!device->block && private->lcu && | |
2019 | !test_bit(DASD_FLAG_OFFLINE, &device->flags)) { | |
2020 | /* | |
2021 | * the state change could be caused by an alias | |
2022 | * reassignment remove device from alias handling | |
2023 | * to prevent new requests from being scheduled on | |
2024 | * the wrong alias device | |
2025 | */ | |
2026 | dasd_alias_remove_device(device); | |
2027 | ||
2028 | /* schedule worker to reload device */ | |
2029 | dasd_reload_device(device); | |
2030 | } | |
8e09f215 SW |
2031 | dasd_generic_handle_state_change(device); |
2032 | return; | |
2033 | } | |
2034 | ||
a5a0061f | 2035 | sense = dasd_get_sense(irb); |
5a27e60d SW |
2036 | if (!sense) |
2037 | return; | |
2038 | ||
2039 | /* summary unit check */ | |
2040 | if ((sense[7] == 0x0D) && | |
a5a0061f | 2041 | (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { |
8e09f215 SW |
2042 | dasd_alias_handle_summary_unit_check(device, irb); |
2043 | return; | |
2044 | } | |
2045 | ||
f60c768c | 2046 | /* service information message SIM */ |
5a27e60d | 2047 | if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && |
f3eb5384 SW |
2048 | ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { |
2049 | dasd_3990_erp_handle_sim(device, sense); | |
f60c768c SH |
2050 | return; |
2051 | } | |
2052 | ||
5a27e60d SW |
2053 | /* loss of device reservation is handled via base devices only |
2054 | * as alias devices may be used with several bases | |
2055 | */ | |
2056 | if (device->block && (sense[7] == 0x3F) && | |
2057 | (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && | |
2058 | test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { | |
2059 | if (device->features & DASD_FEATURE_FAILONSLCK) | |
2060 | set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); | |
2061 | clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); | |
2062 | dev_err(&device->cdev->dev, | |
2063 | "The device reservation was lost\n"); | |
ada3df91 | 2064 | } |
5a27e60d | 2065 | } |
f3eb5384 SW |
2066 | |
2067 | static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( | |
2068 | struct dasd_device *startdev, | |
8e09f215 | 2069 | struct dasd_block *block, |
f3eb5384 SW |
2070 | struct request *req, |
2071 | sector_t first_rec, | |
2072 | sector_t last_rec, | |
2073 | sector_t first_trk, | |
2074 | sector_t last_trk, | |
2075 | unsigned int first_offs, | |
2076 | unsigned int last_offs, | |
2077 | unsigned int blk_per_trk, | |
2078 | unsigned int blksize) | |
1da177e4 LT |
2079 | { |
2080 | struct dasd_eckd_private *private; | |
2081 | unsigned long *idaws; | |
2082 | struct LO_eckd_data *LO_data; | |
2083 | struct dasd_ccw_req *cqr; | |
2084 | struct ccw1 *ccw; | |
5705f702 | 2085 | struct req_iterator iter; |
1da177e4 LT |
2086 | struct bio_vec *bv; |
2087 | char *dst; | |
f3eb5384 | 2088 | unsigned int off; |
1da177e4 | 2089 | int count, cidaw, cplength, datasize; |
f3eb5384 | 2090 | sector_t recid; |
1da177e4 | 2091 | unsigned char cmd, rcmd; |
8e09f215 SW |
2092 | int use_prefix; |
2093 | struct dasd_device *basedev; | |
1da177e4 | 2094 | |
8e09f215 SW |
2095 | basedev = block->base; |
2096 | private = (struct dasd_eckd_private *) basedev->private; | |
1da177e4 LT |
2097 | if (rq_data_dir(req) == READ) |
2098 | cmd = DASD_ECKD_CCW_READ_MT; | |
2099 | else if (rq_data_dir(req) == WRITE) | |
2100 | cmd = DASD_ECKD_CCW_WRITE_MT; | |
2101 | else | |
2102 | return ERR_PTR(-EINVAL); | |
f3eb5384 | 2103 | |
1da177e4 LT |
2104 | /* Check struct bio and count the number of blocks for the request. */ |
2105 | count = 0; | |
2106 | cidaw = 0; | |
5705f702 | 2107 | rq_for_each_segment(bv, req, iter) { |
6c92e699 JA |
2108 | if (bv->bv_len & (blksize - 1)) |
2109 | /* Eckd can only do full blocks. */ | |
2110 | return ERR_PTR(-EINVAL); | |
8e09f215 | 2111 | count += bv->bv_len >> (block->s2b_shift + 9); |
347a8dc3 | 2112 | #if defined(CONFIG_64BIT) |
6c92e699 | 2113 | if (idal_is_needed (page_address(bv->bv_page), bv->bv_len)) |
8e09f215 | 2114 | cidaw += bv->bv_len >> (block->s2b_shift + 9); |
1da177e4 | 2115 | #endif |
1da177e4 LT |
2116 | } |
2117 | /* Paranoia. */ | |
2118 | if (count != last_rec - first_rec + 1) | |
2119 | return ERR_PTR(-EINVAL); | |
8e09f215 SW |
2120 | |
2121 | /* use the prefix command if available */ | |
2122 | use_prefix = private->features.feature[8] & 0x01; | |
2123 | if (use_prefix) { | |
2124 | /* 1x prefix + number of blocks */ | |
2125 | cplength = 2 + count; | |
2126 | /* 1x prefix + cidaws*sizeof(long) */ | |
2127 | datasize = sizeof(struct PFX_eckd_data) + | |
2128 | sizeof(struct LO_eckd_data) + | |
2129 | cidaw * sizeof(unsigned long); | |
2130 | } else { | |
2131 | /* 1x define extent + 1x locate record + number of blocks */ | |
2132 | cplength = 2 + count; | |
2133 | /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ | |
2134 | datasize = sizeof(struct DE_eckd_data) + | |
2135 | sizeof(struct LO_eckd_data) + | |
2136 | cidaw * sizeof(unsigned long); | |
2137 | } | |
1da177e4 LT |
2138 | /* Find out the number of additional locate record ccws for cdl. */ |
2139 | if (private->uses_cdl && first_rec < 2*blk_per_trk) { | |
2140 | if (last_rec >= 2*blk_per_trk) | |
2141 | count = 2*blk_per_trk - first_rec; | |
2142 | cplength += count; | |
2143 | datasize += count*sizeof(struct LO_eckd_data); | |
2144 | } | |
2145 | /* Allocate the ccw request. */ | |
68b781fe SH |
2146 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, |
2147 | startdev); | |
1da177e4 LT |
2148 | if (IS_ERR(cqr)) |
2149 | return cqr; | |
2150 | ccw = cqr->cpaddr; | |
8e09f215 SW |
2151 | /* First ccw is define extent or prefix. */ |
2152 | if (use_prefix) { | |
2153 | if (prefix(ccw++, cqr->data, first_trk, | |
2154 | last_trk, cmd, basedev, startdev) == -EAGAIN) { | |
2155 | /* Clock not in sync and XRC is enabled. | |
2156 | * Try again later. | |
2157 | */ | |
2158 | dasd_sfree_request(cqr, startdev); | |
2159 | return ERR_PTR(-EAGAIN); | |
2160 | } | |
2161 | idaws = (unsigned long *) (cqr->data + | |
2162 | sizeof(struct PFX_eckd_data)); | |
2163 | } else { | |
2164 | if (define_extent(ccw++, cqr->data, first_trk, | |
2165 | last_trk, cmd, startdev) == -EAGAIN) { | |
2166 | /* Clock not in sync and XRC is enabled. | |
2167 | * Try again later. | |
2168 | */ | |
2169 | dasd_sfree_request(cqr, startdev); | |
2170 | return ERR_PTR(-EAGAIN); | |
2171 | } | |
2172 | idaws = (unsigned long *) (cqr->data + | |
2173 | sizeof(struct DE_eckd_data)); | |
d54853ef | 2174 | } |
1da177e4 | 2175 | /* Build locate_record+read/write/ccws. */ |
1da177e4 LT |
2176 | LO_data = (struct LO_eckd_data *) (idaws + cidaw); |
2177 | recid = first_rec; | |
2178 | if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { | |
2179 | /* Only standard blocks so there is just one locate record. */ | |
2180 | ccw[-1].flags |= CCW_FLAG_CC; | |
2181 | locate_record(ccw++, LO_data++, first_trk, first_offs + 1, | |
8e09f215 | 2182 | last_rec - recid + 1, cmd, basedev, blksize); |
1da177e4 | 2183 | } |
5705f702 | 2184 | rq_for_each_segment(bv, req, iter) { |
1da177e4 LT |
2185 | dst = page_address(bv->bv_page) + bv->bv_offset; |
2186 | if (dasd_page_cache) { | |
2187 | char *copy = kmem_cache_alloc(dasd_page_cache, | |
441e143e | 2188 | GFP_DMA | __GFP_NOWARN); |
1da177e4 LT |
2189 | if (copy && rq_data_dir(req) == WRITE) |
2190 | memcpy(copy + bv->bv_offset, dst, bv->bv_len); | |
2191 | if (copy) | |
2192 | dst = copy + bv->bv_offset; | |
2193 | } | |
2194 | for (off = 0; off < bv->bv_len; off += blksize) { | |
2195 | sector_t trkid = recid; | |
2196 | unsigned int recoffs = sector_div(trkid, blk_per_trk); | |
2197 | rcmd = cmd; | |
2198 | count = blksize; | |
2199 | /* Locate record for cdl special block ? */ | |
2200 | if (private->uses_cdl && recid < 2*blk_per_trk) { | |
2201 | if (dasd_eckd_cdl_special(blk_per_trk, recid)){ | |
2202 | rcmd |= 0x8; | |
2203 | count = dasd_eckd_cdl_reclen(recid); | |
ec5883ab HH |
2204 | if (count < blksize && |
2205 | rq_data_dir(req) == READ) | |
1da177e4 LT |
2206 | memset(dst + count, 0xe5, |
2207 | blksize - count); | |
2208 | } | |
2209 | ccw[-1].flags |= CCW_FLAG_CC; | |
2210 | locate_record(ccw++, LO_data++, | |
2211 | trkid, recoffs + 1, | |
8e09f215 | 2212 | 1, rcmd, basedev, count); |
1da177e4 LT |
2213 | } |
2214 | /* Locate record for standard blocks ? */ | |
2215 | if (private->uses_cdl && recid == 2*blk_per_trk) { | |
2216 | ccw[-1].flags |= CCW_FLAG_CC; | |
2217 | locate_record(ccw++, LO_data++, | |
2218 | trkid, recoffs + 1, | |
2219 | last_rec - recid + 1, | |
8e09f215 | 2220 | cmd, basedev, count); |
1da177e4 LT |
2221 | } |
2222 | /* Read/write ccw. */ | |
2223 | ccw[-1].flags |= CCW_FLAG_CC; | |
2224 | ccw->cmd_code = rcmd; | |
2225 | ccw->count = count; | |
2226 | if (idal_is_needed(dst, blksize)) { | |
2227 | ccw->cda = (__u32)(addr_t) idaws; | |
2228 | ccw->flags = CCW_FLAG_IDA; | |
2229 | idaws = idal_create_words(idaws, dst, blksize); | |
2230 | } else { | |
2231 | ccw->cda = (__u32)(addr_t) dst; | |
2232 | ccw->flags = 0; | |
2233 | } | |
2234 | ccw++; | |
2235 | dst += blksize; | |
2236 | recid++; | |
2237 | } | |
2238 | } | |
13de227b HS |
2239 | if (blk_noretry_request(req) || |
2240 | block->base->features & DASD_FEATURE_FAILFAST) | |
1c01b8a5 | 2241 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
8e09f215 SW |
2242 | cqr->startdev = startdev; |
2243 | cqr->memdev = startdev; | |
2244 | cqr->block = block; | |
7c8faa86 | 2245 | cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ |
a4d26c6a | 2246 | cqr->lpm = startdev->path_data.ppm; |
1da177e4 LT |
2247 | cqr->retries = 256; |
2248 | cqr->buildclk = get_clock(); | |
2249 | cqr->status = DASD_CQR_FILLED; | |
2250 | return cqr; | |
2251 | } | |
2252 | ||
f3eb5384 SW |
2253 | static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( |
2254 | struct dasd_device *startdev, | |
2255 | struct dasd_block *block, | |
2256 | struct request *req, | |
2257 | sector_t first_rec, | |
2258 | sector_t last_rec, | |
2259 | sector_t first_trk, | |
2260 | sector_t last_trk, | |
2261 | unsigned int first_offs, | |
2262 | unsigned int last_offs, | |
2263 | unsigned int blk_per_trk, | |
2264 | unsigned int blksize) | |
2265 | { | |
2266 | struct dasd_eckd_private *private; | |
2267 | unsigned long *idaws; | |
2268 | struct dasd_ccw_req *cqr; | |
2269 | struct ccw1 *ccw; | |
2270 | struct req_iterator iter; | |
2271 | struct bio_vec *bv; | |
2272 | char *dst, *idaw_dst; | |
2273 | unsigned int cidaw, cplength, datasize; | |
2274 | unsigned int tlf; | |
2275 | sector_t recid; | |
2276 | unsigned char cmd; | |
2277 | struct dasd_device *basedev; | |
2278 | unsigned int trkcount, count, count_to_trk_end; | |
2279 | unsigned int idaw_len, seg_len, part_len, len_to_track_end; | |
2280 | unsigned char new_track, end_idaw; | |
2281 | sector_t trkid; | |
2282 | unsigned int recoffs; | |
2283 | ||
2284 | basedev = block->base; | |
2285 | private = (struct dasd_eckd_private *) basedev->private; | |
2286 | if (rq_data_dir(req) == READ) | |
2287 | cmd = DASD_ECKD_CCW_READ_TRACK_DATA; | |
2288 | else if (rq_data_dir(req) == WRITE) | |
2289 | cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; | |
2290 | else | |
2291 | return ERR_PTR(-EINVAL); | |
2292 | ||
2293 | /* Track based I/O needs IDAWs for each page, and not just for | |
2294 | * 64 bit addresses. We need additional idals for pages | |
2295 | * that get filled from two tracks, so we use the number | |
2296 | * of records as upper limit. | |
2297 | */ | |
2298 | cidaw = last_rec - first_rec + 1; | |
2299 | trkcount = last_trk - first_trk + 1; | |
2300 | ||
2301 | /* 1x prefix + one read/write ccw per track */ | |
2302 | cplength = 1 + trkcount; | |
2303 | ||
2304 | /* on 31-bit we need space for two 32 bit addresses per page | |
2305 | * on 64-bit one 64 bit address | |
2306 | */ | |
2307 | datasize = sizeof(struct PFX_eckd_data) + | |
2308 | cidaw * sizeof(unsigned long long); | |
2309 | ||
2310 | /* Allocate the ccw request. */ | |
68b781fe SH |
2311 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, |
2312 | startdev); | |
f3eb5384 SW |
2313 | if (IS_ERR(cqr)) |
2314 | return cqr; | |
2315 | ccw = cqr->cpaddr; | |
2316 | /* transfer length factor: how many bytes to read from the last track */ | |
2317 | if (first_trk == last_trk) | |
2318 | tlf = last_offs - first_offs + 1; | |
2319 | else | |
2320 | tlf = last_offs + 1; | |
2321 | tlf *= blksize; | |
2322 | ||
2323 | if (prefix_LRE(ccw++, cqr->data, first_trk, | |
2324 | last_trk, cmd, basedev, startdev, | |
2325 | 1 /* format */, first_offs + 1, | |
2326 | trkcount, blksize, | |
2327 | tlf) == -EAGAIN) { | |
2328 | /* Clock not in sync and XRC is enabled. | |
2329 | * Try again later. | |
2330 | */ | |
2331 | dasd_sfree_request(cqr, startdev); | |
2332 | return ERR_PTR(-EAGAIN); | |
2333 | } | |
2334 | ||
2335 | /* | |
2336 | * The translation of request into ccw programs must meet the | |
2337 | * following conditions: | |
2338 | * - all idaws but the first and the last must address full pages | |
2339 | * (or 2K blocks on 31-bit) | |
2340 | * - the scope of a ccw and it's idal ends with the track boundaries | |
2341 | */ | |
2342 | idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); | |
2343 | recid = first_rec; | |
2344 | new_track = 1; | |
2345 | end_idaw = 0; | |
2346 | len_to_track_end = 0; | |
2347 | idaw_dst = 0; | |
2348 | idaw_len = 0; | |
2349 | rq_for_each_segment(bv, req, iter) { | |
2350 | dst = page_address(bv->bv_page) + bv->bv_offset; | |
2351 | seg_len = bv->bv_len; | |
2352 | while (seg_len) { | |
2353 | if (new_track) { | |
2354 | trkid = recid; | |
2355 | recoffs = sector_div(trkid, blk_per_trk); | |
2356 | count_to_trk_end = blk_per_trk - recoffs; | |
2357 | count = min((last_rec - recid + 1), | |
2358 | (sector_t)count_to_trk_end); | |
2359 | len_to_track_end = count * blksize; | |
2360 | ccw[-1].flags |= CCW_FLAG_CC; | |
2361 | ccw->cmd_code = cmd; | |
2362 | ccw->count = len_to_track_end; | |
2363 | ccw->cda = (__u32)(addr_t)idaws; | |
2364 | ccw->flags = CCW_FLAG_IDA; | |
2365 | ccw++; | |
2366 | recid += count; | |
2367 | new_track = 0; | |
52db45c3 SW |
2368 | /* first idaw for a ccw may start anywhere */ |
2369 | if (!idaw_dst) | |
2370 | idaw_dst = dst; | |
f3eb5384 | 2371 | } |
52db45c3 SW |
2372 | /* If we start a new idaw, we must make sure that it |
2373 | * starts on an IDA_BLOCK_SIZE boundary. | |
f3eb5384 SW |
2374 | * If we continue an idaw, we must make sure that the |
2375 | * current segment begins where the so far accumulated | |
2376 | * idaw ends | |
2377 | */ | |
52db45c3 SW |
2378 | if (!idaw_dst) { |
2379 | if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { | |
2380 | dasd_sfree_request(cqr, startdev); | |
2381 | return ERR_PTR(-ERANGE); | |
2382 | } else | |
2383 | idaw_dst = dst; | |
2384 | } | |
f3eb5384 SW |
2385 | if ((idaw_dst + idaw_len) != dst) { |
2386 | dasd_sfree_request(cqr, startdev); | |
2387 | return ERR_PTR(-ERANGE); | |
2388 | } | |
2389 | part_len = min(seg_len, len_to_track_end); | |
2390 | seg_len -= part_len; | |
2391 | dst += part_len; | |
2392 | idaw_len += part_len; | |
2393 | len_to_track_end -= part_len; | |
2394 | /* collected memory area ends on an IDA_BLOCK border, | |
2395 | * -> create an idaw | |
2396 | * idal_create_words will handle cases where idaw_len | |
2397 | * is larger then IDA_BLOCK_SIZE | |
2398 | */ | |
2399 | if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) | |
2400 | end_idaw = 1; | |
2401 | /* We also need to end the idaw at track end */ | |
2402 | if (!len_to_track_end) { | |
2403 | new_track = 1; | |
2404 | end_idaw = 1; | |
2405 | } | |
2406 | if (end_idaw) { | |
2407 | idaws = idal_create_words(idaws, idaw_dst, | |
2408 | idaw_len); | |
2409 | idaw_dst = 0; | |
2410 | idaw_len = 0; | |
2411 | end_idaw = 0; | |
2412 | } | |
2413 | } | |
2414 | } | |
2415 | ||
2416 | if (blk_noretry_request(req) || | |
2417 | block->base->features & DASD_FEATURE_FAILFAST) | |
2418 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); | |
2419 | cqr->startdev = startdev; | |
2420 | cqr->memdev = startdev; | |
2421 | cqr->block = block; | |
7c8faa86 | 2422 | cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ |
a4d26c6a | 2423 | cqr->lpm = startdev->path_data.ppm; |
f3eb5384 SW |
2424 | cqr->retries = 256; |
2425 | cqr->buildclk = get_clock(); | |
2426 | cqr->status = DASD_CQR_FILLED; | |
2427 | return cqr; | |
2428 | } | |
2429 | ||
2430 | static int prepare_itcw(struct itcw *itcw, | |
2431 | unsigned int trk, unsigned int totrk, int cmd, | |
2432 | struct dasd_device *basedev, | |
2433 | struct dasd_device *startdev, | |
2434 | unsigned int rec_on_trk, int count, | |
2435 | unsigned int blksize, | |
2436 | unsigned int total_data_size, | |
2437 | unsigned int tlf, | |
2438 | unsigned int blk_per_trk) | |
2439 | { | |
2440 | struct PFX_eckd_data pfxdata; | |
2441 | struct dasd_eckd_private *basepriv, *startpriv; | |
2442 | struct DE_eckd_data *dedata; | |
2443 | struct LRE_eckd_data *lredata; | |
2444 | struct dcw *dcw; | |
2445 | ||
2446 | u32 begcyl, endcyl; | |
2447 | u16 heads, beghead, endhead; | |
2448 | u8 pfx_cmd; | |
2449 | ||
2450 | int rc = 0; | |
2451 | int sector = 0; | |
2452 | int dn, d; | |
2453 | ||
2454 | ||
2455 | /* setup prefix data */ | |
2456 | basepriv = (struct dasd_eckd_private *) basedev->private; | |
2457 | startpriv = (struct dasd_eckd_private *) startdev->private; | |
2458 | dedata = &pfxdata.define_extent; | |
2459 | lredata = &pfxdata.locate_record; | |
2460 | ||
2461 | memset(&pfxdata, 0, sizeof(pfxdata)); | |
2462 | pfxdata.format = 1; /* PFX with LRE */ | |
2463 | pfxdata.base_address = basepriv->ned->unit_addr; | |
2464 | pfxdata.base_lss = basepriv->ned->ID; | |
2465 | pfxdata.validity.define_extent = 1; | |
2466 | ||
2467 | /* private uid is kept up to date, conf_data may be outdated */ | |
2468 | if (startpriv->uid.type != UA_BASE_DEVICE) { | |
2469 | pfxdata.validity.verify_base = 1; | |
2470 | if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) | |
2471 | pfxdata.validity.hyper_pav = 1; | |
2472 | } | |
2473 | ||
2474 | switch (cmd) { | |
2475 | case DASD_ECKD_CCW_READ_TRACK_DATA: | |
2476 | dedata->mask.perm = 0x1; | |
2477 | dedata->attributes.operation = basepriv->attrib.operation; | |
2478 | dedata->blk_size = blksize; | |
2479 | dedata->ga_extended |= 0x42; | |
2480 | lredata->operation.orientation = 0x0; | |
2481 | lredata->operation.operation = 0x0C; | |
2482 | lredata->auxiliary.check_bytes = 0x01; | |
2483 | pfx_cmd = DASD_ECKD_CCW_PFX_READ; | |
2484 | break; | |
2485 | case DASD_ECKD_CCW_WRITE_TRACK_DATA: | |
2486 | dedata->mask.perm = 0x02; | |
2487 | dedata->attributes.operation = basepriv->attrib.operation; | |
2488 | dedata->blk_size = blksize; | |
2489 | rc = check_XRC_on_prefix(&pfxdata, basedev); | |
2490 | dedata->ga_extended |= 0x42; | |
2491 | lredata->operation.orientation = 0x0; | |
2492 | lredata->operation.operation = 0x3F; | |
2493 | lredata->extended_operation = 0x23; | |
2494 | lredata->auxiliary.check_bytes = 0x2; | |
2495 | pfx_cmd = DASD_ECKD_CCW_PFX; | |
2496 | break; | |
2497 | default: | |
2498 | DBF_DEV_EVENT(DBF_ERR, basedev, | |
2499 | "prepare itcw, unknown opcode 0x%x", cmd); | |
2500 | BUG(); | |
2501 | break; | |
2502 | } | |
2503 | if (rc) | |
2504 | return rc; | |
2505 | ||
2506 | dedata->attributes.mode = 0x3; /* ECKD */ | |
2507 | ||
2508 | heads = basepriv->rdc_data.trk_per_cyl; | |
2509 | begcyl = trk / heads; | |
2510 | beghead = trk % heads; | |
2511 | endcyl = totrk / heads; | |
2512 | endhead = totrk % heads; | |
2513 | ||
2514 | /* check for sequential prestage - enhance cylinder range */ | |
2515 | if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || | |
2516 | dedata->attributes.operation == DASD_SEQ_ACCESS) { | |
2517 | ||
2518 | if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) | |
2519 | endcyl += basepriv->attrib.nr_cyl; | |
2520 | else | |
2521 | endcyl = (basepriv->real_cyl - 1); | |
2522 | } | |
2523 | ||
2524 | set_ch_t(&dedata->beg_ext, begcyl, beghead); | |
2525 | set_ch_t(&dedata->end_ext, endcyl, endhead); | |
2526 | ||
2527 | dedata->ep_format = 0x20; /* records per track is valid */ | |
2528 | dedata->ep_rec_per_track = blk_per_trk; | |
2529 | ||
2530 | if (rec_on_trk) { | |
2531 | switch (basepriv->rdc_data.dev_type) { | |
2532 | case 0x3390: | |
2533 | dn = ceil_quot(blksize + 6, 232); | |
2534 | d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); | |
2535 | sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; | |
2536 | break; | |
2537 | case 0x3380: | |
2538 | d = 7 + ceil_quot(blksize + 12, 32); | |
2539 | sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; | |
2540 | break; | |
2541 | } | |
2542 | } | |
2543 | ||
2544 | lredata->auxiliary.length_valid = 1; | |
2545 | lredata->auxiliary.length_scope = 1; | |
2546 | lredata->auxiliary.imbedded_ccw_valid = 1; | |
2547 | lredata->length = tlf; | |
2548 | lredata->imbedded_ccw = cmd; | |
2549 | lredata->count = count; | |
2550 | lredata->sector = sector; | |
2551 | set_ch_t(&lredata->seek_addr, begcyl, beghead); | |
2552 | lredata->search_arg.cyl = lredata->seek_addr.cyl; | |
2553 | lredata->search_arg.head = lredata->seek_addr.head; | |
2554 | lredata->search_arg.record = rec_on_trk; | |
2555 | ||
2556 | dcw = itcw_add_dcw(itcw, pfx_cmd, 0, | |
2557 | &pfxdata, sizeof(pfxdata), total_data_size); | |
2558 | ||
2559 | return rc; | |
2560 | } | |
2561 | ||
2562 | static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( | |
2563 | struct dasd_device *startdev, | |
2564 | struct dasd_block *block, | |
2565 | struct request *req, | |
2566 | sector_t first_rec, | |
2567 | sector_t last_rec, | |
2568 | sector_t first_trk, | |
2569 | sector_t last_trk, | |
2570 | unsigned int first_offs, | |
2571 | unsigned int last_offs, | |
2572 | unsigned int blk_per_trk, | |
2573 | unsigned int blksize) | |
2574 | { | |
2575 | struct dasd_eckd_private *private; | |
2576 | struct dasd_ccw_req *cqr; | |
2577 | struct req_iterator iter; | |
2578 | struct bio_vec *bv; | |
2579 | char *dst; | |
2580 | unsigned int trkcount, ctidaw; | |
2581 | unsigned char cmd; | |
2582 | struct dasd_device *basedev; | |
2583 | unsigned int tlf; | |
2584 | struct itcw *itcw; | |
2585 | struct tidaw *last_tidaw = NULL; | |
2586 | int itcw_op; | |
2587 | size_t itcw_size; | |
ef19298b SW |
2588 | u8 tidaw_flags; |
2589 | unsigned int seg_len, part_len, len_to_track_end; | |
2590 | unsigned char new_track; | |
2591 | sector_t recid, trkid; | |
2592 | unsigned int offs; | |
2593 | unsigned int count, count_to_trk_end; | |
f3eb5384 SW |
2594 | |
2595 | basedev = block->base; | |
2596 | private = (struct dasd_eckd_private *) basedev->private; | |
2597 | if (rq_data_dir(req) == READ) { | |
2598 | cmd = DASD_ECKD_CCW_READ_TRACK_DATA; | |
2599 | itcw_op = ITCW_OP_READ; | |
2600 | } else if (rq_data_dir(req) == WRITE) { | |
2601 | cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; | |
2602 | itcw_op = ITCW_OP_WRITE; | |
2603 | } else | |
2604 | return ERR_PTR(-EINVAL); | |
2605 | ||
2606 | /* trackbased I/O needs address all memory via TIDAWs, | |
2607 | * not just for 64 bit addresses. This allows us to map | |
2608 | * each segment directly to one tidaw. | |
ef19298b SW |
2609 | * In the case of write requests, additional tidaws may |
2610 | * be needed when a segment crosses a track boundary. | |
f3eb5384 SW |
2611 | */ |
2612 | trkcount = last_trk - first_trk + 1; | |
2613 | ctidaw = 0; | |
2614 | rq_for_each_segment(bv, req, iter) { | |
2615 | ++ctidaw; | |
2616 | } | |
ef19298b SW |
2617 | if (rq_data_dir(req) == WRITE) |
2618 | ctidaw += (last_trk - first_trk); | |
f3eb5384 SW |
2619 | |
2620 | /* Allocate the ccw request. */ | |
2621 | itcw_size = itcw_calc_size(0, ctidaw, 0); | |
68b781fe | 2622 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); |
f3eb5384 SW |
2623 | if (IS_ERR(cqr)) |
2624 | return cqr; | |
2625 | ||
f3eb5384 SW |
2626 | /* transfer length factor: how many bytes to read from the last track */ |
2627 | if (first_trk == last_trk) | |
2628 | tlf = last_offs - first_offs + 1; | |
2629 | else | |
2630 | tlf = last_offs + 1; | |
2631 | tlf *= blksize; | |
2632 | ||
2633 | itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); | |
ef19298b SW |
2634 | if (IS_ERR(itcw)) { |
2635 | dasd_sfree_request(cqr, startdev); | |
2636 | return ERR_PTR(-EINVAL); | |
2637 | } | |
f3eb5384 | 2638 | cqr->cpaddr = itcw_get_tcw(itcw); |
f3eb5384 SW |
2639 | if (prepare_itcw(itcw, first_trk, last_trk, |
2640 | cmd, basedev, startdev, | |
2641 | first_offs + 1, | |
2642 | trkcount, blksize, | |
2643 | (last_rec - first_rec + 1) * blksize, | |
2644 | tlf, blk_per_trk) == -EAGAIN) { | |
2645 | /* Clock not in sync and XRC is enabled. | |
2646 | * Try again later. | |
2647 | */ | |
2648 | dasd_sfree_request(cqr, startdev); | |
2649 | return ERR_PTR(-EAGAIN); | |
2650 | } | |
f3eb5384 SW |
2651 | /* |
2652 | * A tidaw can address 4k of memory, but must not cross page boundaries | |
2653 | * We can let the block layer handle this by setting | |
2654 | * blk_queue_segment_boundary to page boundaries and | |
2655 | * blk_max_segment_size to page size when setting up the request queue. | |
ef19298b SW |
2656 | * For write requests, a TIDAW must not cross track boundaries, because |
2657 | * we have to set the CBC flag on the last tidaw for each track. | |
f3eb5384 | 2658 | */ |
ef19298b SW |
2659 | if (rq_data_dir(req) == WRITE) { |
2660 | new_track = 1; | |
2661 | recid = first_rec; | |
2662 | rq_for_each_segment(bv, req, iter) { | |
2663 | dst = page_address(bv->bv_page) + bv->bv_offset; | |
2664 | seg_len = bv->bv_len; | |
2665 | while (seg_len) { | |
2666 | if (new_track) { | |
2667 | trkid = recid; | |
2668 | offs = sector_div(trkid, blk_per_trk); | |
2669 | count_to_trk_end = blk_per_trk - offs; | |
2670 | count = min((last_rec - recid + 1), | |
2671 | (sector_t)count_to_trk_end); | |
2672 | len_to_track_end = count * blksize; | |
2673 | recid += count; | |
2674 | new_track = 0; | |
2675 | } | |
2676 | part_len = min(seg_len, len_to_track_end); | |
2677 | seg_len -= part_len; | |
2678 | len_to_track_end -= part_len; | |
2679 | /* We need to end the tidaw at track end */ | |
2680 | if (!len_to_track_end) { | |
2681 | new_track = 1; | |
2682 | tidaw_flags = TIDAW_FLAGS_INSERT_CBC; | |
2683 | } else | |
2684 | tidaw_flags = 0; | |
2685 | last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, | |
2686 | dst, part_len); | |
2687 | if (IS_ERR(last_tidaw)) | |
2688 | return ERR_PTR(-EINVAL); | |
2689 | dst += part_len; | |
2690 | } | |
2691 | } | |
2692 | } else { | |
2693 | rq_for_each_segment(bv, req, iter) { | |
2694 | dst = page_address(bv->bv_page) + bv->bv_offset; | |
2695 | last_tidaw = itcw_add_tidaw(itcw, 0x00, | |
2696 | dst, bv->bv_len); | |
2697 | if (IS_ERR(last_tidaw)) | |
2698 | return ERR_PTR(-EINVAL); | |
2699 | } | |
f3eb5384 | 2700 | } |
ef19298b SW |
2701 | last_tidaw->flags |= TIDAW_FLAGS_LAST; |
2702 | last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; | |
f3eb5384 SW |
2703 | itcw_finalize(itcw); |
2704 | ||
2705 | if (blk_noretry_request(req) || | |
2706 | block->base->features & DASD_FEATURE_FAILFAST) | |
2707 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); | |
ef19298b | 2708 | cqr->cpmode = 1; |
f3eb5384 SW |
2709 | cqr->startdev = startdev; |
2710 | cqr->memdev = startdev; | |
2711 | cqr->block = block; | |
7c8faa86 | 2712 | cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ |
a4d26c6a | 2713 | cqr->lpm = startdev->path_data.ppm; |
f3eb5384 SW |
2714 | cqr->retries = 256; |
2715 | cqr->buildclk = get_clock(); | |
2716 | cqr->status = DASD_CQR_FILLED; | |
2717 | return cqr; | |
2718 | } | |
2719 | ||
2720 | static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, | |
2721 | struct dasd_block *block, | |
2722 | struct request *req) | |
2723 | { | |
ef19298b | 2724 | int cmdrtd, cmdwtd; |
f3eb5384 | 2725 | int use_prefix; |
ef19298b | 2726 | int fcx_multitrack; |
45b44d76 | 2727 | struct dasd_eckd_private *private; |
f3eb5384 SW |
2728 | struct dasd_device *basedev; |
2729 | sector_t first_rec, last_rec; | |
2730 | sector_t first_trk, last_trk; | |
2731 | unsigned int first_offs, last_offs; | |
2732 | unsigned int blk_per_trk, blksize; | |
2733 | int cdlspecial; | |
ef19298b | 2734 | unsigned int data_size; |
f3eb5384 SW |
2735 | struct dasd_ccw_req *cqr; |
2736 | ||
2737 | basedev = block->base; | |
2738 | private = (struct dasd_eckd_private *) basedev->private; | |
2739 | ||
2740 | /* Calculate number of blocks/records per track. */ | |
2741 | blksize = block->bp_block; | |
2742 | blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); | |
6fca97a9 SH |
2743 | if (blk_per_trk == 0) |
2744 | return ERR_PTR(-EINVAL); | |
f3eb5384 | 2745 | /* Calculate record id of first and last block. */ |
83096ebf | 2746 | first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; |
f3eb5384 SW |
2747 | first_offs = sector_div(first_trk, blk_per_trk); |
2748 | last_rec = last_trk = | |
83096ebf | 2749 | (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; |
f3eb5384 SW |
2750 | last_offs = sector_div(last_trk, blk_per_trk); |
2751 | cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); | |
2752 | ||
ef19298b SW |
2753 | fcx_multitrack = private->features.feature[40] & 0x20; |
2754 | data_size = blk_rq_bytes(req); | |
2755 | /* tpm write request add CBC data on each track boundary */ | |
2756 | if (rq_data_dir(req) == WRITE) | |
2757 | data_size += (last_trk - first_trk) * 4; | |
f3eb5384 SW |
2758 | |
2759 | /* is read track data and write track data in command mode supported? */ | |
2760 | cmdrtd = private->features.feature[9] & 0x20; | |
2761 | cmdwtd = private->features.feature[12] & 0x40; | |
2762 | use_prefix = private->features.feature[8] & 0x01; | |
2763 | ||
2764 | cqr = NULL; | |
2765 | if (cdlspecial || dasd_page_cache) { | |
2766 | /* do nothing, just fall through to the cmd mode single case */ | |
ef19298b SW |
2767 | } else if ((data_size <= private->fcx_max_data) |
2768 | && (fcx_multitrack || (first_trk == last_trk))) { | |
f3eb5384 SW |
2769 | cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, |
2770 | first_rec, last_rec, | |
2771 | first_trk, last_trk, | |
2772 | first_offs, last_offs, | |
2773 | blk_per_trk, blksize); | |
ef19298b SW |
2774 | if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && |
2775 | (PTR_ERR(cqr) != -ENOMEM)) | |
f3eb5384 SW |
2776 | cqr = NULL; |
2777 | } else if (use_prefix && | |
2778 | (((rq_data_dir(req) == READ) && cmdrtd) || | |
2779 | ((rq_data_dir(req) == WRITE) && cmdwtd))) { | |
2780 | cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, | |
2781 | first_rec, last_rec, | |
2782 | first_trk, last_trk, | |
2783 | first_offs, last_offs, | |
2784 | blk_per_trk, blksize); | |
ef19298b SW |
2785 | if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && |
2786 | (PTR_ERR(cqr) != -ENOMEM)) | |
f3eb5384 SW |
2787 | cqr = NULL; |
2788 | } | |
2789 | if (!cqr) | |
2790 | cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, | |
2791 | first_rec, last_rec, | |
2792 | first_trk, last_trk, | |
2793 | first_offs, last_offs, | |
2794 | blk_per_trk, blksize); | |
2795 | return cqr; | |
2796 | } | |
2797 | ||
e4dbb0f2 SH |
2798 | static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev, |
2799 | struct dasd_block *block, | |
2800 | struct request *req) | |
2801 | { | |
2802 | struct dasd_eckd_private *private; | |
2803 | unsigned long *idaws; | |
2804 | struct dasd_device *basedev; | |
2805 | struct dasd_ccw_req *cqr; | |
2806 | struct ccw1 *ccw; | |
2807 | struct req_iterator iter; | |
2808 | struct bio_vec *bv; | |
2809 | char *dst; | |
2810 | unsigned char cmd; | |
2811 | unsigned int trkcount; | |
2812 | unsigned int seg_len, len_to_track_end; | |
2813 | unsigned int first_offs; | |
2814 | unsigned int cidaw, cplength, datasize; | |
2815 | sector_t first_trk, last_trk; | |
2816 | unsigned int pfx_datasize; | |
2817 | ||
2818 | /* | |
2819 | * raw track access needs to be mutiple of 64k and on 64k boundary | |
2820 | */ | |
2821 | if ((blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK) != 0) { | |
2822 | cqr = ERR_PTR(-EINVAL); | |
2823 | goto out; | |
2824 | } | |
2825 | if (((blk_rq_pos(req) + blk_rq_sectors(req)) % | |
2826 | DASD_RAW_SECTORS_PER_TRACK) != 0) { | |
2827 | cqr = ERR_PTR(-EINVAL); | |
2828 | goto out; | |
2829 | } | |
2830 | ||
2831 | first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; | |
2832 | last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / | |
2833 | DASD_RAW_SECTORS_PER_TRACK; | |
2834 | trkcount = last_trk - first_trk + 1; | |
2835 | first_offs = 0; | |
2836 | basedev = block->base; | |
2837 | private = (struct dasd_eckd_private *) basedev->private; | |
2838 | ||
2839 | if (rq_data_dir(req) == READ) | |
2840 | cmd = DASD_ECKD_CCW_READ_TRACK; | |
2841 | else if (rq_data_dir(req) == WRITE) | |
2842 | cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; | |
2843 | else { | |
2844 | cqr = ERR_PTR(-EINVAL); | |
2845 | goto out; | |
2846 | } | |
2847 | ||
2848 | /* | |
2849 | * Raw track based I/O needs IDAWs for each page, | |
2850 | * and not just for 64 bit addresses. | |
2851 | */ | |
2852 | cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; | |
2853 | ||
2854 | /* 1x prefix + one read/write ccw per track */ | |
2855 | cplength = 1 + trkcount; | |
2856 | ||
2857 | /* | |
2858 | * struct PFX_eckd_data has up to 2 byte as extended parameter | |
2859 | * this is needed for write full track and has to be mentioned | |
2860 | * seperately | |
2861 | * add 8 instead of 2 to keep 8 byte boundary | |
2862 | */ | |
2863 | pfx_datasize = sizeof(struct PFX_eckd_data) + 8; | |
2864 | ||
2865 | datasize = pfx_datasize + cidaw * sizeof(unsigned long long); | |
2866 | ||
2867 | /* Allocate the ccw request. */ | |
2868 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, | |
2869 | datasize, startdev); | |
2870 | if (IS_ERR(cqr)) | |
2871 | goto out; | |
2872 | ccw = cqr->cpaddr; | |
2873 | ||
2874 | if (prefix_LRE(ccw++, cqr->data, first_trk, last_trk, cmd, | |
2875 | basedev, startdev, 1 /* format */, first_offs + 1, | |
2876 | trkcount, 0, 0) == -EAGAIN) { | |
2877 | /* Clock not in sync and XRC is enabled. | |
2878 | * Try again later. | |
2879 | */ | |
2880 | dasd_sfree_request(cqr, startdev); | |
2881 | cqr = ERR_PTR(-EAGAIN); | |
2882 | goto out; | |
2883 | } | |
2884 | ||
2885 | idaws = (unsigned long *)(cqr->data + pfx_datasize); | |
2886 | ||
2887 | len_to_track_end = 0; | |
2888 | ||
2889 | rq_for_each_segment(bv, req, iter) { | |
2890 | dst = page_address(bv->bv_page) + bv->bv_offset; | |
2891 | seg_len = bv->bv_len; | |
2892 | if (!len_to_track_end) { | |
2893 | ccw[-1].flags |= CCW_FLAG_CC; | |
2894 | ccw->cmd_code = cmd; | |
2895 | /* maximum 3390 track size */ | |
2896 | ccw->count = 57326; | |
2897 | /* 64k map to one track */ | |
2898 | len_to_track_end = 65536; | |
2899 | ccw->cda = (__u32)(addr_t)idaws; | |
2900 | ccw->flags |= CCW_FLAG_IDA; | |
2901 | ccw->flags |= CCW_FLAG_SLI; | |
2902 | ccw++; | |
2903 | } | |
2904 | len_to_track_end -= seg_len; | |
2905 | idaws = idal_create_words(idaws, dst, seg_len); | |
2906 | } | |
2907 | ||
2908 | if (blk_noretry_request(req) || | |
2909 | block->base->features & DASD_FEATURE_FAILFAST) | |
2910 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); | |
2911 | cqr->startdev = startdev; | |
2912 | cqr->memdev = startdev; | |
2913 | cqr->block = block; | |
2914 | cqr->expires = startdev->default_expires * HZ; | |
2915 | cqr->lpm = startdev->path_data.ppm; | |
2916 | cqr->retries = 256; | |
2917 | cqr->buildclk = get_clock(); | |
2918 | cqr->status = DASD_CQR_FILLED; | |
2919 | ||
2920 | if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN) | |
2921 | cqr = NULL; | |
2922 | out: | |
2923 | return cqr; | |
2924 | } | |
2925 | ||
2926 | ||
1da177e4 LT |
2927 | static int |
2928 | dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) | |
2929 | { | |
2930 | struct dasd_eckd_private *private; | |
2931 | struct ccw1 *ccw; | |
5705f702 | 2932 | struct req_iterator iter; |
1da177e4 LT |
2933 | struct bio_vec *bv; |
2934 | char *dst, *cda; | |
2935 | unsigned int blksize, blk_per_trk, off; | |
2936 | sector_t recid; | |
5705f702 | 2937 | int status; |
1da177e4 LT |
2938 | |
2939 | if (!dasd_page_cache) | |
2940 | goto out; | |
8e09f215 SW |
2941 | private = (struct dasd_eckd_private *) cqr->block->base->private; |
2942 | blksize = cqr->block->bp_block; | |
1da177e4 | 2943 | blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); |
83096ebf | 2944 | recid = blk_rq_pos(req) >> cqr->block->s2b_shift; |
1da177e4 LT |
2945 | ccw = cqr->cpaddr; |
2946 | /* Skip over define extent & locate record. */ | |
2947 | ccw++; | |
2948 | if (private->uses_cdl == 0 || recid > 2*blk_per_trk) | |
2949 | ccw++; | |
5705f702 | 2950 | rq_for_each_segment(bv, req, iter) { |
1da177e4 LT |
2951 | dst = page_address(bv->bv_page) + bv->bv_offset; |
2952 | for (off = 0; off < bv->bv_len; off += blksize) { | |
2953 | /* Skip locate record. */ | |
2954 | if (private->uses_cdl && recid <= 2*blk_per_trk) | |
2955 | ccw++; | |
2956 | if (dst) { | |
2957 | if (ccw->flags & CCW_FLAG_IDA) | |
2958 | cda = *((char **)((addr_t) ccw->cda)); | |
2959 | else | |
2960 | cda = (char *)((addr_t) ccw->cda); | |
2961 | if (dst != cda) { | |
2962 | if (rq_data_dir(req) == READ) | |
2963 | memcpy(dst, cda, bv->bv_len); | |
2964 | kmem_cache_free(dasd_page_cache, | |
2965 | (void *)((addr_t)cda & PAGE_MASK)); | |
2966 | } | |
2967 | dst = NULL; | |
2968 | } | |
2969 | ccw++; | |
2970 | recid++; | |
2971 | } | |
2972 | } | |
2973 | out: | |
2974 | status = cqr->status == DASD_CQR_DONE; | |
8e09f215 | 2975 | dasd_sfree_request(cqr, cqr->memdev); |
1da177e4 LT |
2976 | return status; |
2977 | } | |
2978 | ||
8e09f215 | 2979 | /* |
f3eb5384 | 2980 | * Modify ccw/tcw in cqr so it can be started on a base device. |
8e09f215 SW |
2981 | * |
2982 | * Note that this is not enough to restart the cqr! | |
2983 | * Either reset cqr->startdev as well (summary unit check handling) | |
2984 | * or restart via separate cqr (as in ERP handling). | |
2985 | */ | |
2986 | void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) | |
2987 | { | |
2988 | struct ccw1 *ccw; | |
2989 | struct PFX_eckd_data *pfxdata; | |
f3eb5384 SW |
2990 | struct tcw *tcw; |
2991 | struct tccb *tccb; | |
2992 | struct dcw *dcw; | |
2993 | ||
2994 | if (cqr->cpmode == 1) { | |
2995 | tcw = cqr->cpaddr; | |
2996 | tccb = tcw_get_tccb(tcw); | |
2997 | dcw = (struct dcw *)&tccb->tca[0]; | |
2998 | pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; | |
8e09f215 SW |
2999 | pfxdata->validity.verify_base = 0; |
3000 | pfxdata->validity.hyper_pav = 0; | |
f3eb5384 SW |
3001 | } else { |
3002 | ccw = cqr->cpaddr; | |
3003 | pfxdata = cqr->data; | |
3004 | if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { | |
3005 | pfxdata->validity.verify_base = 0; | |
3006 | pfxdata->validity.hyper_pav = 0; | |
3007 | } | |
8e09f215 SW |
3008 | } |
3009 | } | |
3010 | ||
3011 | #define DASD_ECKD_CHANQ_MAX_SIZE 4 | |
3012 | ||
3013 | static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, | |
3014 | struct dasd_block *block, | |
3015 | struct request *req) | |
3016 | { | |
3017 | struct dasd_eckd_private *private; | |
3018 | struct dasd_device *startdev; | |
3019 | unsigned long flags; | |
3020 | struct dasd_ccw_req *cqr; | |
3021 | ||
3022 | startdev = dasd_alias_get_start_dev(base); | |
3023 | if (!startdev) | |
3024 | startdev = base; | |
3025 | private = (struct dasd_eckd_private *) startdev->private; | |
3026 | if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) | |
3027 | return ERR_PTR(-EBUSY); | |
3028 | ||
3029 | spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); | |
3030 | private->count++; | |
e4dbb0f2 SH |
3031 | if ((base->features & DASD_FEATURE_USERAW)) |
3032 | cqr = dasd_raw_build_cp(startdev, block, req); | |
3033 | else | |
3034 | cqr = dasd_eckd_build_cp(startdev, block, req); | |
8e09f215 SW |
3035 | if (IS_ERR(cqr)) |
3036 | private->count--; | |
3037 | spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); | |
3038 | return cqr; | |
3039 | } | |
3040 | ||
3041 | static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, | |
3042 | struct request *req) | |
3043 | { | |
3044 | struct dasd_eckd_private *private; | |
3045 | unsigned long flags; | |
3046 | ||
3047 | spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); | |
3048 | private = (struct dasd_eckd_private *) cqr->memdev->private; | |
3049 | private->count--; | |
3050 | spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); | |
3051 | return dasd_eckd_free_cp(cqr, req); | |
3052 | } | |
3053 | ||
1da177e4 LT |
3054 | static int |
3055 | dasd_eckd_fill_info(struct dasd_device * device, | |
3056 | struct dasd_information2_t * info) | |
3057 | { | |
3058 | struct dasd_eckd_private *private; | |
3059 | ||
3060 | private = (struct dasd_eckd_private *) device->private; | |
3061 | info->label_block = 2; | |
3062 | info->FBA_layout = private->uses_cdl ? 0 : 1; | |
3063 | info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; | |
3064 | info->characteristics_size = sizeof(struct dasd_eckd_characteristics); | |
3065 | memcpy(info->characteristics, &private->rdc_data, | |
3066 | sizeof(struct dasd_eckd_characteristics)); | |
4abb08c2 SW |
3067 | info->confdata_size = min((unsigned long)private->conf_len, |
3068 | sizeof(info->configuration_data)); | |
3069 | memcpy(info->configuration_data, private->conf_data, | |
3070 | info->confdata_size); | |
1da177e4 LT |
3071 | return 0; |
3072 | } | |
3073 | ||
3074 | /* | |
3075 | * SECTION: ioctl functions for eckd devices. | |
3076 | */ | |
3077 | ||
3078 | /* | |
3079 | * Release device ioctl. | |
138c014d | 3080 | * Buils a channel programm to releases a prior reserved |
1da177e4 LT |
3081 | * (see dasd_eckd_reserve) device. |
3082 | */ | |
3083 | static int | |
1107ccfb | 3084 | dasd_eckd_release(struct dasd_device *device) |
1da177e4 | 3085 | { |
1da177e4 LT |
3086 | struct dasd_ccw_req *cqr; |
3087 | int rc; | |
f3eb5384 | 3088 | struct ccw1 *ccw; |
f932bcea | 3089 | int useglobal; |
1da177e4 LT |
3090 | |
3091 | if (!capable(CAP_SYS_ADMIN)) | |
3092 | return -EACCES; | |
3093 | ||
f932bcea | 3094 | useglobal = 0; |
68b781fe | 3095 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); |
1da177e4 | 3096 | if (IS_ERR(cqr)) { |
f932bcea SW |
3097 | mutex_lock(&dasd_reserve_mutex); |
3098 | useglobal = 1; | |
3099 | cqr = &dasd_reserve_req->cqr; | |
3100 | memset(cqr, 0, sizeof(*cqr)); | |
3101 | memset(&dasd_reserve_req->ccw, 0, | |
3102 | sizeof(dasd_reserve_req->ccw)); | |
3103 | cqr->cpaddr = &dasd_reserve_req->ccw; | |
3104 | cqr->data = &dasd_reserve_req->data; | |
3105 | cqr->magic = DASD_ECKD_MAGIC; | |
1da177e4 | 3106 | } |
f3eb5384 SW |
3107 | ccw = cqr->cpaddr; |
3108 | ccw->cmd_code = DASD_ECKD_CCW_RELEASE; | |
3109 | ccw->flags |= CCW_FLAG_SLI; | |
3110 | ccw->count = 32; | |
3111 | ccw->cda = (__u32)(addr_t) cqr->data; | |
8e09f215 SW |
3112 | cqr->startdev = device; |
3113 | cqr->memdev = device; | |
1da177e4 | 3114 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
1c01b8a5 | 3115 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
336c340b | 3116 | cqr->retries = 2; /* set retry counter to enable basic ERP */ |
1da177e4 LT |
3117 | cqr->expires = 2 * HZ; |
3118 | cqr->buildclk = get_clock(); | |
3119 | cqr->status = DASD_CQR_FILLED; | |
3120 | ||
3121 | rc = dasd_sleep_on_immediatly(cqr); | |
5a27e60d SW |
3122 | if (!rc) |
3123 | clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); | |
1da177e4 | 3124 | |
f932bcea SW |
3125 | if (useglobal) |
3126 | mutex_unlock(&dasd_reserve_mutex); | |
3127 | else | |
3128 | dasd_sfree_request(cqr, cqr->memdev); | |
1da177e4 LT |
3129 | return rc; |
3130 | } | |
3131 | ||
3132 | /* | |
3133 | * Reserve device ioctl. | |
3134 | * Options are set to 'synchronous wait for interrupt' and | |
138c014d HH |
3135 | * 'timeout the request'. This leads to a terminate IO if |
3136 | * the interrupt is outstanding for a certain time. | |
1da177e4 LT |
3137 | */ |
3138 | static int | |
1107ccfb | 3139 | dasd_eckd_reserve(struct dasd_device *device) |
1da177e4 | 3140 | { |
1da177e4 LT |
3141 | struct dasd_ccw_req *cqr; |
3142 | int rc; | |
f3eb5384 | 3143 | struct ccw1 *ccw; |
f932bcea | 3144 | int useglobal; |
1da177e4 LT |
3145 | |
3146 | if (!capable(CAP_SYS_ADMIN)) | |
3147 | return -EACCES; | |
3148 | ||
f932bcea | 3149 | useglobal = 0; |
68b781fe | 3150 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); |
1da177e4 | 3151 | if (IS_ERR(cqr)) { |
f932bcea SW |
3152 | mutex_lock(&dasd_reserve_mutex); |
3153 | useglobal = 1; | |
3154 | cqr = &dasd_reserve_req->cqr; | |
3155 | memset(cqr, 0, sizeof(*cqr)); | |
3156 | memset(&dasd_reserve_req->ccw, 0, | |
3157 | sizeof(dasd_reserve_req->ccw)); | |
3158 | cqr->cpaddr = &dasd_reserve_req->ccw; | |
3159 | cqr->data = &dasd_reserve_req->data; | |
3160 | cqr->magic = DASD_ECKD_MAGIC; | |
1da177e4 | 3161 | } |
f3eb5384 SW |
3162 | ccw = cqr->cpaddr; |
3163 | ccw->cmd_code = DASD_ECKD_CCW_RESERVE; | |
3164 | ccw->flags |= CCW_FLAG_SLI; | |
3165 | ccw->count = 32; | |
3166 | ccw->cda = (__u32)(addr_t) cqr->data; | |
8e09f215 SW |
3167 | cqr->startdev = device; |
3168 | cqr->memdev = device; | |
1da177e4 | 3169 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
1c01b8a5 | 3170 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
336c340b | 3171 | cqr->retries = 2; /* set retry counter to enable basic ERP */ |
1da177e4 LT |
3172 | cqr->expires = 2 * HZ; |
3173 | cqr->buildclk = get_clock(); | |
3174 | cqr->status = DASD_CQR_FILLED; | |
3175 | ||
3176 | rc = dasd_sleep_on_immediatly(cqr); | |
5a27e60d SW |
3177 | if (!rc) |
3178 | set_bit(DASD_FLAG_IS_RESERVED, &device->flags); | |
1da177e4 | 3179 | |
f932bcea SW |
3180 | if (useglobal) |
3181 | mutex_unlock(&dasd_reserve_mutex); | |
3182 | else | |
3183 | dasd_sfree_request(cqr, cqr->memdev); | |
1da177e4 LT |
3184 | return rc; |
3185 | } | |
3186 | ||
3187 | /* | |
3188 | * Steal lock ioctl - unconditional reserve device. | |
138c014d | 3189 | * Buils a channel programm to break a device's reservation. |
1da177e4 LT |
3190 | * (unconditional reserve) |
3191 | */ | |
3192 | static int | |
1107ccfb | 3193 | dasd_eckd_steal_lock(struct dasd_device *device) |
1da177e4 | 3194 | { |
1da177e4 LT |
3195 | struct dasd_ccw_req *cqr; |
3196 | int rc; | |
f3eb5384 | 3197 | struct ccw1 *ccw; |
f932bcea | 3198 | int useglobal; |
1da177e4 LT |
3199 | |
3200 | if (!capable(CAP_SYS_ADMIN)) | |
3201 | return -EACCES; | |
3202 | ||
f932bcea | 3203 | useglobal = 0; |
68b781fe | 3204 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); |
1da177e4 | 3205 | if (IS_ERR(cqr)) { |
f932bcea SW |
3206 | mutex_lock(&dasd_reserve_mutex); |
3207 | useglobal = 1; | |
3208 | cqr = &dasd_reserve_req->cqr; | |
3209 | memset(cqr, 0, sizeof(*cqr)); | |
3210 | memset(&dasd_reserve_req->ccw, 0, | |
3211 | sizeof(dasd_reserve_req->ccw)); | |
3212 | cqr->cpaddr = &dasd_reserve_req->ccw; | |
3213 | cqr->data = &dasd_reserve_req->data; | |
3214 | cqr->magic = DASD_ECKD_MAGIC; | |
1da177e4 | 3215 | } |
f3eb5384 SW |
3216 | ccw = cqr->cpaddr; |
3217 | ccw->cmd_code = DASD_ECKD_CCW_SLCK; | |
3218 | ccw->flags |= CCW_FLAG_SLI; | |
3219 | ccw->count = 32; | |
3220 | ccw->cda = (__u32)(addr_t) cqr->data; | |
8e09f215 SW |
3221 | cqr->startdev = device; |
3222 | cqr->memdev = device; | |
1da177e4 | 3223 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
1c01b8a5 | 3224 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
336c340b | 3225 | cqr->retries = 2; /* set retry counter to enable basic ERP */ |
1da177e4 LT |
3226 | cqr->expires = 2 * HZ; |
3227 | cqr->buildclk = get_clock(); | |
3228 | cqr->status = DASD_CQR_FILLED; | |
3229 | ||
3230 | rc = dasd_sleep_on_immediatly(cqr); | |
5a27e60d SW |
3231 | if (!rc) |
3232 | set_bit(DASD_FLAG_IS_RESERVED, &device->flags); | |
1da177e4 | 3233 | |
f932bcea SW |
3234 | if (useglobal) |
3235 | mutex_unlock(&dasd_reserve_mutex); | |
3236 | else | |
3237 | dasd_sfree_request(cqr, cqr->memdev); | |
1da177e4 LT |
3238 | return rc; |
3239 | } | |
3240 | ||
196339f1 SW |
3241 | /* |
3242 | * SNID - Sense Path Group ID | |
3243 | * This ioctl may be used in situations where I/O is stalled due to | |
3244 | * a reserve, so if the normal dasd_smalloc_request fails, we use the | |
3245 | * preallocated dasd_reserve_req. | |
3246 | */ | |
3247 | static int dasd_eckd_snid(struct dasd_device *device, | |
3248 | void __user *argp) | |
3249 | { | |
3250 | struct dasd_ccw_req *cqr; | |
3251 | int rc; | |
3252 | struct ccw1 *ccw; | |
3253 | int useglobal; | |
3254 | struct dasd_snid_ioctl_data usrparm; | |
3255 | ||
3256 | if (!capable(CAP_SYS_ADMIN)) | |
3257 | return -EACCES; | |
3258 | ||
3259 | if (copy_from_user(&usrparm, argp, sizeof(usrparm))) | |
3260 | return -EFAULT; | |
3261 | ||
3262 | useglobal = 0; | |
3263 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, | |
3264 | sizeof(struct dasd_snid_data), device); | |
3265 | if (IS_ERR(cqr)) { | |
3266 | mutex_lock(&dasd_reserve_mutex); | |
3267 | useglobal = 1; | |
3268 | cqr = &dasd_reserve_req->cqr; | |
3269 | memset(cqr, 0, sizeof(*cqr)); | |
3270 | memset(&dasd_reserve_req->ccw, 0, | |
3271 | sizeof(dasd_reserve_req->ccw)); | |
3272 | cqr->cpaddr = &dasd_reserve_req->ccw; | |
3273 | cqr->data = &dasd_reserve_req->data; | |
3274 | cqr->magic = DASD_ECKD_MAGIC; | |
3275 | } | |
3276 | ccw = cqr->cpaddr; | |
3277 | ccw->cmd_code = DASD_ECKD_CCW_SNID; | |
3278 | ccw->flags |= CCW_FLAG_SLI; | |
3279 | ccw->count = 12; | |
3280 | ccw->cda = (__u32)(addr_t) cqr->data; | |
3281 | cqr->startdev = device; | |
3282 | cqr->memdev = device; | |
3283 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); | |
3284 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); | |
5a27e60d | 3285 | set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); |
196339f1 SW |
3286 | cqr->retries = 5; |
3287 | cqr->expires = 10 * HZ; | |
3288 | cqr->buildclk = get_clock(); | |
3289 | cqr->status = DASD_CQR_FILLED; | |
3290 | cqr->lpm = usrparm.path_mask; | |
3291 | ||
3292 | rc = dasd_sleep_on_immediatly(cqr); | |
3293 | /* verify that I/O processing didn't modify the path mask */ | |
3294 | if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) | |
3295 | rc = -EIO; | |
3296 | if (!rc) { | |
3297 | usrparm.data = *((struct dasd_snid_data *)cqr->data); | |
3298 | if (copy_to_user(argp, &usrparm, sizeof(usrparm))) | |
3299 | rc = -EFAULT; | |
3300 | } | |
3301 | ||
3302 | if (useglobal) | |
3303 | mutex_unlock(&dasd_reserve_mutex); | |
3304 | else | |
3305 | dasd_sfree_request(cqr, cqr->memdev); | |
3306 | return rc; | |
3307 | } | |
3308 | ||
1da177e4 LT |
3309 | /* |
3310 | * Read performance statistics | |
3311 | */ | |
3312 | static int | |
1107ccfb | 3313 | dasd_eckd_performance(struct dasd_device *device, void __user *argp) |
1da177e4 | 3314 | { |
1da177e4 LT |
3315 | struct dasd_psf_prssd_data *prssdp; |
3316 | struct dasd_rssd_perf_stats_t *stats; | |
3317 | struct dasd_ccw_req *cqr; | |
3318 | struct ccw1 *ccw; | |
3319 | int rc; | |
3320 | ||
68b781fe | 3321 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, |
8e09f215 SW |
3322 | (sizeof(struct dasd_psf_prssd_data) + |
3323 | sizeof(struct dasd_rssd_perf_stats_t)), | |
1da177e4 LT |
3324 | device); |
3325 | if (IS_ERR(cqr)) { | |
fc19f381 | 3326 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
1da177e4 LT |
3327 | "Could not allocate initialization request"); |
3328 | return PTR_ERR(cqr); | |
3329 | } | |
8e09f215 SW |
3330 | cqr->startdev = device; |
3331 | cqr->memdev = device; | |
1da177e4 | 3332 | cqr->retries = 0; |
eb6e199b | 3333 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
1da177e4 LT |
3334 | cqr->expires = 10 * HZ; |
3335 | ||
3336 | /* Prepare for Read Subsystem Data */ | |
3337 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
8e09f215 | 3338 | memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); |
1da177e4 | 3339 | prssdp->order = PSF_ORDER_PRSSD; |
5d67d164 | 3340 | prssdp->suborder = 0x01; /* Performance Statistics */ |
1da177e4 LT |
3341 | prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ |
3342 | ||
3343 | ccw = cqr->cpaddr; | |
3344 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
8e09f215 | 3345 | ccw->count = sizeof(struct dasd_psf_prssd_data); |
1da177e4 LT |
3346 | ccw->flags |= CCW_FLAG_CC; |
3347 | ccw->cda = (__u32)(addr_t) prssdp; | |
3348 | ||
3349 | /* Read Subsystem Data - Performance Statistics */ | |
3350 | stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); | |
8e09f215 | 3351 | memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); |
1da177e4 LT |
3352 | |
3353 | ccw++; | |
3354 | ccw->cmd_code = DASD_ECKD_CCW_RSSD; | |
8e09f215 | 3355 | ccw->count = sizeof(struct dasd_rssd_perf_stats_t); |
1da177e4 LT |
3356 | ccw->cda = (__u32)(addr_t) stats; |
3357 | ||
3358 | cqr->buildclk = get_clock(); | |
3359 | cqr->status = DASD_CQR_FILLED; | |
3360 | rc = dasd_sleep_on(cqr); | |
3361 | if (rc == 0) { | |
1da177e4 LT |
3362 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; |
3363 | stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); | |
1107ccfb CH |
3364 | if (copy_to_user(argp, stats, |
3365 | sizeof(struct dasd_rssd_perf_stats_t))) | |
3366 | rc = -EFAULT; | |
1da177e4 | 3367 | } |
8e09f215 | 3368 | dasd_sfree_request(cqr, cqr->memdev); |
1da177e4 LT |
3369 | return rc; |
3370 | } | |
3371 | ||
3372 | /* | |
3373 | * Get attributes (cache operations) | |
3374 | * Returnes the cache attributes used in Define Extend (DE). | |
3375 | */ | |
3376 | static int | |
1107ccfb | 3377 | dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) |
1da177e4 | 3378 | { |
1107ccfb CH |
3379 | struct dasd_eckd_private *private = |
3380 | (struct dasd_eckd_private *)device->private; | |
3381 | struct attrib_data_t attrib = private->attrib; | |
1da177e4 LT |
3382 | int rc; |
3383 | ||
3384 | if (!capable(CAP_SYS_ADMIN)) | |
3385 | return -EACCES; | |
1107ccfb | 3386 | if (!argp) |
1da177e4 LT |
3387 | return -EINVAL; |
3388 | ||
1107ccfb CH |
3389 | rc = 0; |
3390 | if (copy_to_user(argp, (long *) &attrib, | |
8e09f215 | 3391 | sizeof(struct attrib_data_t))) |
1107ccfb | 3392 | rc = -EFAULT; |
1da177e4 LT |
3393 | |
3394 | return rc; | |
3395 | } | |
3396 | ||
3397 | /* | |
3398 | * Set attributes (cache operations) | |
3399 | * Stores the attributes for cache operation to be used in Define Extend (DE). | |
3400 | */ | |
3401 | static int | |
1107ccfb | 3402 | dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) |
1da177e4 | 3403 | { |
1107ccfb CH |
3404 | struct dasd_eckd_private *private = |
3405 | (struct dasd_eckd_private *)device->private; | |
1da177e4 LT |
3406 | struct attrib_data_t attrib; |
3407 | ||
3408 | if (!capable(CAP_SYS_ADMIN)) | |
3409 | return -EACCES; | |
1107ccfb | 3410 | if (!argp) |
1da177e4 LT |
3411 | return -EINVAL; |
3412 | ||
1107ccfb | 3413 | if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) |
1da177e4 | 3414 | return -EFAULT; |
1da177e4 LT |
3415 | private->attrib = attrib; |
3416 | ||
fc19f381 SH |
3417 | dev_info(&device->cdev->dev, |
3418 | "The DASD cache mode was set to %x (%i cylinder prestage)\n", | |
3419 | private->attrib.operation, private->attrib.nr_cyl); | |
1da177e4 LT |
3420 | return 0; |
3421 | } | |
3422 | ||
ab1d848f NH |
3423 | /* |
3424 | * Issue syscall I/O to EMC Symmetrix array. | |
3425 | * CCWs are PSF and RSSD | |
3426 | */ | |
3427 | static int dasd_symm_io(struct dasd_device *device, void __user *argp) | |
3428 | { | |
3429 | struct dasd_symmio_parms usrparm; | |
3430 | char *psf_data, *rssd_result; | |
3431 | struct dasd_ccw_req *cqr; | |
3432 | struct ccw1 *ccw; | |
52898025 | 3433 | char psf0, psf1; |
ab1d848f NH |
3434 | int rc; |
3435 | ||
52898025 NH |
3436 | if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) |
3437 | return -EACCES; | |
3438 | psf0 = psf1 = 0; | |
3439 | ||
ab1d848f NH |
3440 | /* Copy parms from caller */ |
3441 | rc = -EFAULT; | |
3442 | if (copy_from_user(&usrparm, argp, sizeof(usrparm))) | |
3443 | goto out; | |
f8b06859 HC |
3444 | if (is_compat_task() || sizeof(long) == 4) { |
3445 | /* Make sure pointers are sane even on 31 bit. */ | |
ab1d848f | 3446 | rc = -EINVAL; |
f8b06859 HC |
3447 | if ((usrparm.psf_data >> 32) != 0) |
3448 | goto out; | |
3449 | if ((usrparm.rssd_result >> 32) != 0) | |
3450 | goto out; | |
3451 | usrparm.psf_data &= 0x7fffffffULL; | |
3452 | usrparm.rssd_result &= 0x7fffffffULL; | |
ab1d848f | 3453 | } |
ab1d848f NH |
3454 | /* alloc I/O data area */ |
3455 | psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); | |
3456 | rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); | |
3457 | if (!psf_data || !rssd_result) { | |
3458 | rc = -ENOMEM; | |
3459 | goto out_free; | |
3460 | } | |
3461 | ||
3462 | /* get syscall header from user space */ | |
3463 | rc = -EFAULT; | |
3464 | if (copy_from_user(psf_data, | |
3465 | (void __user *)(unsigned long) usrparm.psf_data, | |
3466 | usrparm.psf_data_len)) | |
3467 | goto out_free; | |
52898025 NH |
3468 | psf0 = psf_data[0]; |
3469 | psf1 = psf_data[1]; | |
ab1d848f NH |
3470 | |
3471 | /* setup CCWs for PSF + RSSD */ | |
68b781fe | 3472 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device); |
ab1d848f | 3473 | if (IS_ERR(cqr)) { |
fc19f381 | 3474 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
ab1d848f NH |
3475 | "Could not allocate initialization request"); |
3476 | rc = PTR_ERR(cqr); | |
3477 | goto out_free; | |
3478 | } | |
3479 | ||
3480 | cqr->startdev = device; | |
3481 | cqr->memdev = device; | |
3482 | cqr->retries = 3; | |
3483 | cqr->expires = 10 * HZ; | |
3484 | cqr->buildclk = get_clock(); | |
3485 | cqr->status = DASD_CQR_FILLED; | |
3486 | ||
3487 | /* Build the ccws */ | |
3488 | ccw = cqr->cpaddr; | |
3489 | ||
3490 | /* PSF ccw */ | |
3491 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
3492 | ccw->count = usrparm.psf_data_len; | |
3493 | ccw->flags |= CCW_FLAG_CC; | |
3494 | ccw->cda = (__u32)(addr_t) psf_data; | |
3495 | ||
3496 | ccw++; | |
3497 | ||
3498 | /* RSSD ccw */ | |
3499 | ccw->cmd_code = DASD_ECKD_CCW_RSSD; | |
3500 | ccw->count = usrparm.rssd_result_len; | |
3501 | ccw->flags = CCW_FLAG_SLI ; | |
3502 | ccw->cda = (__u32)(addr_t) rssd_result; | |
3503 | ||
3504 | rc = dasd_sleep_on(cqr); | |
3505 | if (rc) | |
3506 | goto out_sfree; | |
3507 | ||
3508 | rc = -EFAULT; | |
3509 | if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, | |
3510 | rssd_result, usrparm.rssd_result_len)) | |
3511 | goto out_sfree; | |
3512 | rc = 0; | |
3513 | ||
3514 | out_sfree: | |
3515 | dasd_sfree_request(cqr, cqr->memdev); | |
3516 | out_free: | |
3517 | kfree(rssd_result); | |
3518 | kfree(psf_data); | |
3519 | out: | |
52898025 NH |
3520 | DBF_DEV_EVENT(DBF_WARNING, device, |
3521 | "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", | |
3522 | (int) psf0, (int) psf1, rc); | |
ab1d848f NH |
3523 | return rc; |
3524 | } | |
3525 | ||
1107ccfb | 3526 | static int |
8e09f215 | 3527 | dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) |
1107ccfb | 3528 | { |
8e09f215 SW |
3529 | struct dasd_device *device = block->base; |
3530 | ||
1107ccfb CH |
3531 | switch (cmd) { |
3532 | case BIODASDGATTR: | |
3533 | return dasd_eckd_get_attrib(device, argp); | |
3534 | case BIODASDSATTR: | |
3535 | return dasd_eckd_set_attrib(device, argp); | |
3536 | case BIODASDPSRD: | |
3537 | return dasd_eckd_performance(device, argp); | |
3538 | case BIODASDRLSE: | |
3539 | return dasd_eckd_release(device); | |
3540 | case BIODASDRSRV: | |
3541 | return dasd_eckd_reserve(device); | |
3542 | case BIODASDSLCK: | |
3543 | return dasd_eckd_steal_lock(device); | |
196339f1 SW |
3544 | case BIODASDSNID: |
3545 | return dasd_eckd_snid(device, argp); | |
ab1d848f NH |
3546 | case BIODASDSYMMIO: |
3547 | return dasd_symm_io(device, argp); | |
1107ccfb CH |
3548 | default: |
3549 | return -ENOIOCTLCMD; | |
3550 | } | |
3551 | } | |
3552 | ||
445b5b49 HH |
3553 | /* |
3554 | * Dump the range of CCWs into 'page' buffer | |
3555 | * and return number of printed chars. | |
3556 | */ | |
4d284cac | 3557 | static int |
445b5b49 HH |
3558 | dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) |
3559 | { | |
3560 | int len, count; | |
3561 | char *datap; | |
3562 | ||
3563 | len = 0; | |
3564 | while (from <= to) { | |
3565 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER | |
3566 | " CCW %p: %08X %08X DAT:", | |
3567 | from, ((int *) from)[0], ((int *) from)[1]); | |
3568 | ||
3569 | /* get pointer to data (consider IDALs) */ | |
3570 | if (from->flags & CCW_FLAG_IDA) | |
3571 | datap = (char *) *((addr_t *) (addr_t) from->cda); | |
3572 | else | |
3573 | datap = (char *) ((addr_t) from->cda); | |
3574 | ||
3575 | /* dump data (max 32 bytes) */ | |
3576 | for (count = 0; count < from->count && count < 32; count++) { | |
3577 | if (count % 8 == 0) len += sprintf(page + len, " "); | |
3578 | if (count % 4 == 0) len += sprintf(page + len, " "); | |
3579 | len += sprintf(page + len, "%02x", datap[count]); | |
3580 | } | |
3581 | len += sprintf(page + len, "\n"); | |
3582 | from++; | |
3583 | } | |
3584 | return len; | |
3585 | } | |
3586 | ||
fc19f381 | 3587 | static void |
aeec92ca SH |
3588 | dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, |
3589 | char *reason) | |
fc19f381 SH |
3590 | { |
3591 | u64 *sense; | |
a5a0061f | 3592 | u64 *stat; |
aeec92ca SH |
3593 | |
3594 | sense = (u64 *) dasd_get_sense(irb); | |
a5a0061f | 3595 | stat = (u64 *) &irb->scsw; |
fc19f381 | 3596 | if (sense) { |
a5a0061f SW |
3597 | DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " |
3598 | "%016llx %016llx %016llx %016llx", | |
3599 | reason, *stat, *((u32 *) (stat + 1)), | |
ed3640b2 | 3600 | sense[0], sense[1], sense[2], sense[3]); |
fc19f381 | 3601 | } else { |
a5a0061f SW |
3602 | DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", |
3603 | reason, *stat, *((u32 *) (stat + 1)), | |
3604 | "NO VALID SENSE"); | |
fc19f381 SH |
3605 | } |
3606 | } | |
3607 | ||
1da177e4 LT |
3608 | /* |
3609 | * Print sense data and related channel program. | |
3610 | * Parts are printed because printk buffer is only 1024 bytes. | |
3611 | */ | |
f3eb5384 | 3612 | static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, |
8e09f215 | 3613 | struct dasd_ccw_req *req, struct irb *irb) |
1da177e4 LT |
3614 | { |
3615 | char *page; | |
445b5b49 HH |
3616 | struct ccw1 *first, *last, *fail, *from, *to; |
3617 | int len, sl, sct; | |
1da177e4 LT |
3618 | |
3619 | page = (char *) get_zeroed_page(GFP_ATOMIC); | |
3620 | if (page == NULL) { | |
fc19f381 SH |
3621 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
3622 | "No memory to dump sense data\n"); | |
1da177e4 LT |
3623 | return; |
3624 | } | |
445b5b49 HH |
3625 | /* dump the sense data */ |
3626 | len = sprintf(page, KERN_ERR PRINTK_HEADER | |
1da177e4 | 3627 | " I/O status report for device %s:\n", |
2a0217d5 | 3628 | dev_name(&device->cdev->dev)); |
1da177e4 | 3629 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER |
a5a0061f SW |
3630 | " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " |
3631 | "CS:%02X RC:%d\n", | |
3632 | req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), | |
3633 | scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), | |
3634 | scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), | |
3635 | req ? req->intrc : 0); | |
1da177e4 LT |
3636 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER |
3637 | " device %s: Failing CCW: %p\n", | |
2a0217d5 | 3638 | dev_name(&device->cdev->dev), |
23d805b6 | 3639 | (void *) (addr_t) irb->scsw.cmd.cpa); |
1da177e4 LT |
3640 | if (irb->esw.esw0.erw.cons) { |
3641 | for (sl = 0; sl < 4; sl++) { | |
3642 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER | |
3643 | " Sense(hex) %2d-%2d:", | |
3644 | (8 * sl), ((8 * sl) + 7)); | |
3645 | ||
3646 | for (sct = 0; sct < 8; sct++) { | |
3647 | len += sprintf(page + len, " %02x", | |
3648 | irb->ecw[8 * sl + sct]); | |
3649 | } | |
3650 | len += sprintf(page + len, "\n"); | |
3651 | } | |
3652 | ||
3653 | if (irb->ecw[27] & DASD_SENSE_BIT_0) { | |
3654 | /* 24 Byte Sense Data */ | |
445b5b49 HH |
3655 | sprintf(page + len, KERN_ERR PRINTK_HEADER |
3656 | " 24 Byte: %x MSG %x, " | |
3657 | "%s MSGb to SYSOP\n", | |
3658 | irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, | |
3659 | irb->ecw[1] & 0x10 ? "" : "no"); | |
1da177e4 LT |
3660 | } else { |
3661 | /* 32 Byte Sense Data */ | |
445b5b49 HH |
3662 | sprintf(page + len, KERN_ERR PRINTK_HEADER |
3663 | " 32 Byte: Format: %x " | |
3664 | "Exception class %x\n", | |
3665 | irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); | |
1da177e4 LT |
3666 | } |
3667 | } else { | |
445b5b49 HH |
3668 | sprintf(page + len, KERN_ERR PRINTK_HEADER |
3669 | " SORRY - NO VALID SENSE AVAILABLE\n"); | |
1da177e4 | 3670 | } |
445b5b49 HH |
3671 | printk("%s", page); |
3672 | ||
8e09f215 SW |
3673 | if (req) { |
3674 | /* req == NULL for unsolicited interrupts */ | |
3675 | /* dump the Channel Program (max 140 Bytes per line) */ | |
3676 | /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ | |
3677 | first = req->cpaddr; | |
3678 | for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); | |
3679 | to = min(first + 6, last); | |
3680 | len = sprintf(page, KERN_ERR PRINTK_HEADER | |
3681 | " Related CP in req: %p\n", req); | |
3682 | dasd_eckd_dump_ccw_range(first, to, page + len); | |
3683 | printk("%s", page); | |
1da177e4 | 3684 | |
8e09f215 SW |
3685 | /* print failing CCW area (maximum 4) */ |
3686 | /* scsw->cda is either valid or zero */ | |
3687 | len = 0; | |
3688 | from = ++to; | |
23d805b6 PO |
3689 | fail = (struct ccw1 *)(addr_t) |
3690 | irb->scsw.cmd.cpa; /* failing CCW */ | |
8e09f215 SW |
3691 | if (from < fail - 2) { |
3692 | from = fail - 2; /* there is a gap - print header */ | |
3693 | len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n"); | |
3694 | } | |
3695 | to = min(fail + 1, last); | |
3696 | len += dasd_eckd_dump_ccw_range(from, to, page + len); | |
3697 | ||
3698 | /* print last CCWs (maximum 2) */ | |
3699 | from = max(from, ++to); | |
3700 | if (from < last - 1) { | |
3701 | from = last - 1; /* there is a gap - print header */ | |
3702 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n"); | |
3703 | } | |
3704 | len += dasd_eckd_dump_ccw_range(from, last, page + len); | |
3705 | if (len > 0) | |
3706 | printk("%s", page); | |
1da177e4 | 3707 | } |
1da177e4 LT |
3708 | free_page((unsigned long) page); |
3709 | } | |
3710 | ||
f3eb5384 SW |
3711 | |
3712 | /* | |
3713 | * Print sense data from a tcw. | |
3714 | */ | |
3715 | static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, | |
3716 | struct dasd_ccw_req *req, struct irb *irb) | |
3717 | { | |
3718 | char *page; | |
3719 | int len, sl, sct, residual; | |
f3eb5384 | 3720 | struct tsb *tsb; |
ef19298b | 3721 | u8 *sense, *rcq; |
f3eb5384 SW |
3722 | |
3723 | page = (char *) get_zeroed_page(GFP_ATOMIC); | |
3724 | if (page == NULL) { | |
fc19f381 | 3725 | DBF_DEV_EVENT(DBF_WARNING, device, " %s", |
f3eb5384 SW |
3726 | "No memory to dump sense data"); |
3727 | return; | |
3728 | } | |
3729 | /* dump the sense data */ | |
3730 | len = sprintf(page, KERN_ERR PRINTK_HEADER | |
3731 | " I/O status report for device %s:\n", | |
3732 | dev_name(&device->cdev->dev)); | |
3733 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER | |
a5a0061f SW |
3734 | " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " |
3735 | "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", | |
3736 | req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), | |
3737 | scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), | |
3738 | scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), | |
3739 | irb->scsw.tm.fcxs, irb->scsw.tm.schxs, | |
3740 | req ? req->intrc : 0); | |
f3eb5384 SW |
3741 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER |
3742 | " device %s: Failing TCW: %p\n", | |
3743 | dev_name(&device->cdev->dev), | |
3744 | (void *) (addr_t) irb->scsw.tm.tcw); | |
3745 | ||
3746 | tsb = NULL; | |
3747 | sense = NULL; | |
a5a0061f | 3748 | if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) |
f3eb5384 SW |
3749 | tsb = tcw_get_tsb( |
3750 | (struct tcw *)(unsigned long)irb->scsw.tm.tcw); | |
3751 | ||
b8fde722 | 3752 | if (tsb) { |
f3eb5384 SW |
3753 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER |
3754 | " tsb->length %d\n", tsb->length); | |
3755 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER | |
3756 | " tsb->flags %x\n", tsb->flags); | |
3757 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER | |
3758 | " tsb->dcw_offset %d\n", tsb->dcw_offset); | |
3759 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER | |
3760 | " tsb->count %d\n", tsb->count); | |
3761 | residual = tsb->count - 28; | |
3762 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER | |
3763 | " residual %d\n", residual); | |
3764 | ||
3765 | switch (tsb->flags & 0x07) { | |
3766 | case 1: /* tsa_iostat */ | |
3767 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER | |
3768 | " tsb->tsa.iostat.dev_time %d\n", | |
3769 | tsb->tsa.iostat.dev_time); | |
3770 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER | |
3771 | " tsb->tsa.iostat.def_time %d\n", | |
3772 | tsb->tsa.iostat.def_time); | |
3773 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER | |
3774 | " tsb->tsa.iostat.queue_time %d\n", | |
3775 | tsb->tsa.iostat.queue_time); | |
3776 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER | |
3777 | " tsb->tsa.iostat.dev_busy_time %d\n", | |
3778 | tsb->tsa.iostat.dev_busy_time); | |
3779 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER | |
3780 | " tsb->tsa.iostat.dev_act_time %d\n", | |
3781 | tsb->tsa.iostat.dev_act_time); | |
3782 | sense = tsb->tsa.iostat.sense; | |
3783 | break; | |
3784 | case 2: /* ts_ddpc */ | |
3785 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER | |
3786 | " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); | |
ef19298b SW |
3787 | for (sl = 0; sl < 2; sl++) { |
3788 | len += sprintf(page + len, | |
3789 | KERN_ERR PRINTK_HEADER | |
3790 | " tsb->tsa.ddpc.rcq %2d-%2d: ", | |
3791 | (8 * sl), ((8 * sl) + 7)); | |
3792 | rcq = tsb->tsa.ddpc.rcq; | |
f3eb5384 SW |
3793 | for (sct = 0; sct < 8; sct++) { |
3794 | len += sprintf(page + len, " %02x", | |
ef19298b | 3795 | rcq[8 * sl + sct]); |
f3eb5384 SW |
3796 | } |
3797 | len += sprintf(page + len, "\n"); | |
3798 | } | |
3799 | sense = tsb->tsa.ddpc.sense; | |
3800 | break; | |
3801 | case 3: /* tsa_intrg */ | |
3802 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER | |
3803 | " tsb->tsa.intrg.: not supportet yet \n"); | |
3804 | break; | |
3805 | } | |
3806 | ||
3807 | if (sense) { | |
3808 | for (sl = 0; sl < 4; sl++) { | |
3809 | len += sprintf(page + len, | |
3810 | KERN_ERR PRINTK_HEADER | |
3811 | " Sense(hex) %2d-%2d:", | |
3812 | (8 * sl), ((8 * sl) + 7)); | |
3813 | for (sct = 0; sct < 8; sct++) { | |
3814 | len += sprintf(page + len, " %02x", | |
3815 | sense[8 * sl + sct]); | |
3816 | } | |
3817 | len += sprintf(page + len, "\n"); | |
3818 | } | |
3819 | ||
3820 | if (sense[27] & DASD_SENSE_BIT_0) { | |
3821 | /* 24 Byte Sense Data */ | |
3822 | sprintf(page + len, KERN_ERR PRINTK_HEADER | |
3823 | " 24 Byte: %x MSG %x, " | |
3824 | "%s MSGb to SYSOP\n", | |
3825 | sense[7] >> 4, sense[7] & 0x0f, | |
3826 | sense[1] & 0x10 ? "" : "no"); | |
3827 | } else { | |
3828 | /* 32 Byte Sense Data */ | |
3829 | sprintf(page + len, KERN_ERR PRINTK_HEADER | |
3830 | " 32 Byte: Format: %x " | |
3831 | "Exception class %x\n", | |
3832 | sense[6] & 0x0f, sense[22] >> 4); | |
3833 | } | |
3834 | } else { | |
3835 | sprintf(page + len, KERN_ERR PRINTK_HEADER | |
3836 | " SORRY - NO VALID SENSE AVAILABLE\n"); | |
3837 | } | |
3838 | } else { | |
3839 | sprintf(page + len, KERN_ERR PRINTK_HEADER | |
3840 | " SORRY - NO TSB DATA AVAILABLE\n"); | |
3841 | } | |
3842 | printk("%s", page); | |
3843 | free_page((unsigned long) page); | |
3844 | } | |
3845 | ||
3846 | static void dasd_eckd_dump_sense(struct dasd_device *device, | |
3847 | struct dasd_ccw_req *req, struct irb *irb) | |
3848 | { | |
a5a0061f | 3849 | if (scsw_is_tm(&irb->scsw)) |
f3eb5384 SW |
3850 | dasd_eckd_dump_sense_tcw(device, req, irb); |
3851 | else | |
3852 | dasd_eckd_dump_sense_ccw(device, req, irb); | |
3853 | } | |
3854 | ||
501183f2 | 3855 | static int dasd_eckd_pm_freeze(struct dasd_device *device) |
d41dd122 SH |
3856 | { |
3857 | /* | |
3858 | * the device should be disconnected from our LCU structure | |
3859 | * on restore we will reconnect it and reread LCU specific | |
3860 | * information like PAV support that might have changed | |
3861 | */ | |
3862 | dasd_alias_remove_device(device); | |
3863 | dasd_alias_disconnect_device_from_lcu(device); | |
3864 | ||
3865 | return 0; | |
3866 | } | |
3867 | ||
501183f2 | 3868 | static int dasd_eckd_restore_device(struct dasd_device *device) |
d41dd122 SH |
3869 | { |
3870 | struct dasd_eckd_private *private; | |
6fca97a9 | 3871 | struct dasd_eckd_characteristics temp_rdc_data; |
d41dd122 SH |
3872 | int is_known, rc; |
3873 | struct dasd_uid temp_uid; | |
a7602f6c | 3874 | unsigned long flags; |
d41dd122 | 3875 | |
d41dd122 SH |
3876 | private = (struct dasd_eckd_private *) device->private; |
3877 | ||
3878 | /* Read Configuration Data */ | |
3879 | rc = dasd_eckd_read_conf(device); | |
3880 | if (rc) | |
3881 | goto out_err; | |
3882 | ||
2dedf0d9 SH |
3883 | dasd_eckd_get_uid(device, &temp_uid); |
3884 | /* Generate device unique id */ | |
3885 | rc = dasd_eckd_generate_uid(device); | |
3886 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); | |
d41dd122 | 3887 | if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) |
a7602f6c SH |
3888 | dev_err(&device->cdev->dev, "The UID of the DASD has " |
3889 | "changed\n"); | |
2dedf0d9 | 3890 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
d41dd122 SH |
3891 | if (rc) |
3892 | goto out_err; | |
d41dd122 SH |
3893 | |
3894 | /* register lcu with alias handling, enable PAV if this is a new lcu */ | |
3895 | is_known = dasd_alias_make_device_known_to_lcu(device); | |
3896 | if (is_known < 0) | |
3897 | return is_known; | |
3898 | if (!is_known) { | |
f4ac1d02 SW |
3899 | dasd_eckd_validate_server(device); |
3900 | dasd_alias_lcu_setup_complete(device); | |
3901 | } else | |
3902 | dasd_alias_wait_for_lcu_setup(device); | |
3903 | ||
3904 | /* RE-Read Configuration Data */ | |
3905 | rc = dasd_eckd_read_conf(device); | |
3906 | if (rc) | |
3907 | goto out_err; | |
d41dd122 SH |
3908 | |
3909 | /* Read Feature Codes */ | |
68d1e5f0 | 3910 | dasd_eckd_read_features(device); |
d41dd122 SH |
3911 | |
3912 | /* Read Device Characteristics */ | |
68b781fe | 3913 | rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, |
6fca97a9 | 3914 | &temp_rdc_data, 64); |
d41dd122 | 3915 | if (rc) { |
b8ed5dd5 SH |
3916 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, |
3917 | "Read device characteristic failed, rc=%d", rc); | |
d41dd122 SH |
3918 | goto out_err; |
3919 | } | |
a7602f6c | 3920 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); |
6fca97a9 | 3921 | memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); |
a7602f6c | 3922 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
d41dd122 SH |
3923 | |
3924 | /* add device to alias management */ | |
3925 | dasd_alias_add_device(device); | |
3926 | ||
3927 | return 0; | |
3928 | ||
3929 | out_err: | |
e6125fba | 3930 | return -1; |
d41dd122 SH |
3931 | } |
3932 | ||
501183f2 SH |
3933 | static int dasd_eckd_reload_device(struct dasd_device *device) |
3934 | { | |
3935 | struct dasd_eckd_private *private; | |
3936 | int rc, old_base; | |
2dedf0d9 SH |
3937 | char print_uid[60]; |
3938 | struct dasd_uid uid; | |
3939 | unsigned long flags; | |
501183f2 SH |
3940 | |
3941 | private = (struct dasd_eckd_private *) device->private; | |
2dedf0d9 SH |
3942 | |
3943 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); | |
501183f2 | 3944 | old_base = private->uid.base_unit_addr; |
2dedf0d9 SH |
3945 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
3946 | ||
501183f2 SH |
3947 | /* Read Configuration Data */ |
3948 | rc = dasd_eckd_read_conf(device); | |
3949 | if (rc) | |
3950 | goto out_err; | |
3951 | ||
2dedf0d9 | 3952 | rc = dasd_eckd_generate_uid(device); |
501183f2 SH |
3953 | if (rc) |
3954 | goto out_err; | |
501183f2 SH |
3955 | /* |
3956 | * update unit address configuration and | |
3957 | * add device to alias management | |
3958 | */ | |
3959 | dasd_alias_update_add_device(device); | |
3960 | ||
2dedf0d9 SH |
3961 | dasd_eckd_get_uid(device, &uid); |
3962 | ||
3963 | if (old_base != uid.base_unit_addr) { | |
3964 | if (strlen(uid.vduit) > 0) | |
3965 | snprintf(print_uid, sizeof(print_uid), | |
3966 | "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, | |
3967 | uid.ssid, uid.base_unit_addr, uid.vduit); | |
501183f2 | 3968 | else |
2dedf0d9 SH |
3969 | snprintf(print_uid, sizeof(print_uid), |
3970 | "%s.%s.%04x.%02x", uid.vendor, uid.serial, | |
3971 | uid.ssid, uid.base_unit_addr); | |
501183f2 SH |
3972 | |
3973 | dev_info(&device->cdev->dev, | |
3974 | "An Alias device was reassigned to a new base device " | |
2dedf0d9 | 3975 | "with UID: %s\n", print_uid); |
501183f2 SH |
3976 | } |
3977 | return 0; | |
3978 | ||
3979 | out_err: | |
3980 | return -1; | |
3981 | } | |
3982 | ||
d41dd122 SH |
3983 | static struct ccw_driver dasd_eckd_driver = { |
3984 | .name = "dasd-eckd", | |
3985 | .owner = THIS_MODULE, | |
3986 | .ids = dasd_eckd_ids, | |
3987 | .probe = dasd_eckd_probe, | |
3988 | .remove = dasd_generic_remove, | |
3989 | .set_offline = dasd_generic_set_offline, | |
3990 | .set_online = dasd_eckd_set_online, | |
3991 | .notify = dasd_generic_notify, | |
a4d26c6a | 3992 | .path_event = dasd_generic_path_event, |
d41dd122 SH |
3993 | .freeze = dasd_generic_pm_freeze, |
3994 | .thaw = dasd_generic_restore_device, | |
3995 | .restore = dasd_generic_restore_device, | |
a23ed009 | 3996 | .uc_handler = dasd_generic_uc_handler, |
d41dd122 | 3997 | }; |
f3eb5384 | 3998 | |
1da177e4 LT |
3999 | /* |
4000 | * max_blocks is dependent on the amount of storage that is available | |
4001 | * in the static io buffer for each device. Currently each device has | |
4002 | * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has | |
4003 | * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use | |
4004 | * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In | |
4005 | * addition we have one define extent ccw + 16 bytes of data and one | |
4006 | * locate record ccw + 16 bytes of data. That makes: | |
4007 | * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. | |
4008 | * We want to fit two into the available memory so that we can immediately | |
4009 | * start the next request if one finishes off. That makes 249.5 blocks | |
4010 | * for one request. Give a little safety and the result is 240. | |
4011 | */ | |
4012 | static struct dasd_discipline dasd_eckd_discipline = { | |
4013 | .owner = THIS_MODULE, | |
4014 | .name = "ECKD", | |
4015 | .ebcname = "ECKD", | |
ef19298b | 4016 | .max_blocks = 190, |
1da177e4 | 4017 | .check_device = dasd_eckd_check_characteristics, |
8e09f215 | 4018 | .uncheck_device = dasd_eckd_uncheck_device, |
1da177e4 | 4019 | .do_analysis = dasd_eckd_do_analysis, |
a4d26c6a | 4020 | .verify_path = dasd_eckd_verify_path, |
8e09f215 SW |
4021 | .ready_to_online = dasd_eckd_ready_to_online, |
4022 | .online_to_ready = dasd_eckd_online_to_ready, | |
1da177e4 LT |
4023 | .fill_geometry = dasd_eckd_fill_geometry, |
4024 | .start_IO = dasd_start_IO, | |
4025 | .term_IO = dasd_term_IO, | |
8e09f215 | 4026 | .handle_terminated_request = dasd_eckd_handle_terminated_request, |
1da177e4 | 4027 | .format_device = dasd_eckd_format_device, |
1da177e4 LT |
4028 | .erp_action = dasd_eckd_erp_action, |
4029 | .erp_postaction = dasd_eckd_erp_postaction, | |
5a27e60d | 4030 | .check_for_device_change = dasd_eckd_check_for_device_change, |
8e09f215 SW |
4031 | .build_cp = dasd_eckd_build_alias_cp, |
4032 | .free_cp = dasd_eckd_free_alias_cp, | |
1da177e4 | 4033 | .dump_sense = dasd_eckd_dump_sense, |
fc19f381 | 4034 | .dump_sense_dbf = dasd_eckd_dump_sense_dbf, |
1da177e4 | 4035 | .fill_info = dasd_eckd_fill_info, |
1107ccfb | 4036 | .ioctl = dasd_eckd_ioctl, |
d41dd122 SH |
4037 | .freeze = dasd_eckd_pm_freeze, |
4038 | .restore = dasd_eckd_restore_device, | |
501183f2 | 4039 | .reload = dasd_eckd_reload_device, |
2dedf0d9 | 4040 | .get_uid = dasd_eckd_get_uid, |
1da177e4 LT |
4041 | }; |
4042 | ||
4043 | static int __init | |
4044 | dasd_eckd_init(void) | |
4045 | { | |
736e6ea0 SO |
4046 | int ret; |
4047 | ||
1da177e4 | 4048 | ASCEBC(dasd_eckd_discipline.ebcname, 4); |
f932bcea SW |
4049 | dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), |
4050 | GFP_KERNEL | GFP_DMA); | |
4051 | if (!dasd_reserve_req) | |
4052 | return -ENOMEM; | |
a4d26c6a SW |
4053 | path_verification_worker = kmalloc(sizeof(*path_verification_worker), |
4054 | GFP_KERNEL | GFP_DMA); | |
4055 | if (!path_verification_worker) { | |
4056 | kfree(dasd_reserve_req); | |
4057 | return -ENOMEM; | |
4058 | } | |
736e6ea0 SO |
4059 | ret = ccw_driver_register(&dasd_eckd_driver); |
4060 | if (!ret) | |
4061 | wait_for_device_probe(); | |
a4d26c6a SW |
4062 | else { |
4063 | kfree(path_verification_worker); | |
f932bcea | 4064 | kfree(dasd_reserve_req); |
a4d26c6a | 4065 | } |
736e6ea0 | 4066 | return ret; |
1da177e4 LT |
4067 | } |
4068 | ||
4069 | static void __exit | |
4070 | dasd_eckd_cleanup(void) | |
4071 | { | |
4072 | ccw_driver_unregister(&dasd_eckd_driver); | |
a4d26c6a | 4073 | kfree(path_verification_worker); |
f932bcea | 4074 | kfree(dasd_reserve_req); |
1da177e4 LT |
4075 | } |
4076 | ||
4077 | module_init(dasd_eckd_init); | |
4078 | module_exit(dasd_eckd_cleanup); |