]>
Commit | Line | Data |
---|---|---|
138c014d | 1 | /* |
1da177e4 | 2 | * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> |
138c014d | 3 | * Horst Hummel <Horst.Hummel@de.ibm.com> |
1da177e4 LT |
4 | * Carsten Otte <Cotte@de.ibm.com> |
5 | * Martin Schwidefsky <schwidefsky@de.ibm.com> | |
6 | * Bugreports.to..: <Linux390@de.ibm.com> | |
d41dd122 | 7 | * Copyright IBM Corp. 1999, 2009 |
ab1d848f NH |
8 | * EMC Symmetrix ioctl Copyright EMC Corporation, 2008 |
9 | * Author.........: Nigel Hislop <hislop_nigel@emc.com> | |
1da177e4 LT |
10 | */ |
11 | ||
ca99dab0 | 12 | #define KMSG_COMPONENT "dasd-eckd" |
fc19f381 | 13 | |
1da177e4 LT |
14 | #include <linux/stddef.h> |
15 | #include <linux/kernel.h> | |
16 | #include <linux/slab.h> | |
17 | #include <linux/hdreg.h> /* HDIO_GETGEO */ | |
18 | #include <linux/bio.h> | |
19 | #include <linux/module.h> | |
048cd4e5 | 20 | #include <linux/compat.h> |
1da177e4 LT |
21 | #include <linux/init.h> |
22 | ||
382b7366 | 23 | #include <asm/css_chars.h> |
1da177e4 LT |
24 | #include <asm/debug.h> |
25 | #include <asm/idals.h> | |
26 | #include <asm/ebcdic.h> | |
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" | |
35 | ||
36 | #ifdef PRINTK_HEADER | |
37 | #undef PRINTK_HEADER | |
38 | #endif /* PRINTK_HEADER */ | |
39 | #define PRINTK_HEADER "dasd(eckd):" | |
40 | ||
41 | #define ECKD_C0(i) (i->home_bytes) | |
42 | #define ECKD_F(i) (i->formula) | |
43 | #define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\ | |
44 | (i->factors.f_0x02.f1)) | |
45 | #define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\ | |
46 | (i->factors.f_0x02.f2)) | |
47 | #define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\ | |
48 | (i->factors.f_0x02.f3)) | |
49 | #define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0) | |
50 | #define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0) | |
51 | #define ECKD_F6(i) (i->factor6) | |
52 | #define ECKD_F7(i) (i->factor7) | |
53 | #define ECKD_F8(i) (i->factor8) | |
54 | ||
e4dbb0f2 SH |
55 | /* |
56 | * raw track access always map to 64k in memory | |
57 | * so it maps to 16 blocks of 4k per track | |
58 | */ | |
59 | #define DASD_RAW_BLOCK_PER_TRACK 16 | |
60 | #define DASD_RAW_BLOCKSIZE 4096 | |
61 | /* 64k are 128 x 512 byte sectors */ | |
62 | #define DASD_RAW_SECTORS_PER_TRACK 128 | |
63 | ||
1da177e4 LT |
64 | MODULE_LICENSE("GPL"); |
65 | ||
66 | static struct dasd_discipline dasd_eckd_discipline; | |
67 | ||
1da177e4 LT |
68 | /* The ccw bus type uses this table to find devices that it sends to |
69 | * dasd_eckd_probe */ | |
70 | static struct ccw_device_id dasd_eckd_ids[] = { | |
d2c993d8 HC |
71 | { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1}, |
72 | { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2}, | |
5da24b76 | 73 | { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info = 0x3}, |
d2c993d8 HC |
74 | { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4}, |
75 | { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5}, | |
76 | { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6}, | |
77 | { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7}, | |
78 | { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8}, | |
79 | { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9}, | |
80 | { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa}, | |
1da177e4 LT |
81 | { /* end of list */ }, |
82 | }; | |
83 | ||
84 | MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids); | |
85 | ||
86 | static struct ccw_driver dasd_eckd_driver; /* see below */ | |
87 | ||
eb6e199b SW |
88 | #define INIT_CQR_OK 0 |
89 | #define INIT_CQR_UNFORMATTED 1 | |
90 | #define INIT_CQR_ERROR 2 | |
91 | ||
f932bcea SW |
92 | /* emergency request for reserve/release */ |
93 | static struct { | |
94 | struct dasd_ccw_req cqr; | |
95 | struct ccw1 ccw; | |
96 | char data[32]; | |
97 | } *dasd_reserve_req; | |
98 | static DEFINE_MUTEX(dasd_reserve_mutex); | |
99 | ||
a4d26c6a SW |
100 | /* definitions for the path verification worker */ |
101 | struct path_verification_work_data { | |
102 | struct work_struct worker; | |
103 | struct dasd_device *device; | |
104 | struct dasd_ccw_req cqr; | |
105 | struct ccw1 ccw; | |
106 | __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE]; | |
107 | int isglobal; | |
108 | __u8 tbvpm; | |
109 | }; | |
110 | static struct path_verification_work_data *path_verification_worker; | |
111 | static DEFINE_MUTEX(dasd_path_verification_mutex); | |
eb6e199b | 112 | |
1da177e4 LT |
113 | /* initial attempt at a probe function. this can be simplified once |
114 | * the other detection code is gone */ | |
115 | static int | |
116 | dasd_eckd_probe (struct ccw_device *cdev) | |
117 | { | |
118 | int ret; | |
119 | ||
40545573 | 120 | /* set ECKD specific ccw-device options */ |
454e1fa1 PO |
121 | ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE | |
122 | CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH); | |
40545573 | 123 | if (ret) { |
b8ed5dd5 SH |
124 | DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", |
125 | "dasd_eckd_probe: could not set " | |
126 | "ccw-device options"); | |
1da177e4 | 127 | return ret; |
40545573 HH |
128 | } |
129 | ret = dasd_generic_probe(cdev, &dasd_eckd_discipline); | |
130 | return ret; | |
1da177e4 LT |
131 | } |
132 | ||
133 | static int | |
134 | dasd_eckd_set_online(struct ccw_device *cdev) | |
135 | { | |
40545573 | 136 | return dasd_generic_set_online(cdev, &dasd_eckd_discipline); |
1da177e4 LT |
137 | } |
138 | ||
1da177e4 LT |
139 | static const int sizes_trk0[] = { 28, 148, 84 }; |
140 | #define LABEL_SIZE 140 | |
141 | ||
3bc9fef9 SH |
142 | /* head and record addresses of count_area read in analysis ccw */ |
143 | static const int count_area_head[] = { 0, 0, 0, 0, 2 }; | |
144 | static const int count_area_rec[] = { 1, 2, 3, 4, 1 }; | |
145 | ||
1da177e4 LT |
146 | static inline unsigned int |
147 | round_up_multiple(unsigned int no, unsigned int mult) | |
148 | { | |
149 | int rem = no % mult; | |
150 | return (rem ? no - rem + mult : no); | |
151 | } | |
152 | ||
153 | static inline unsigned int | |
154 | ceil_quot(unsigned int d1, unsigned int d2) | |
155 | { | |
156 | return (d1 + (d2 - 1)) / d2; | |
157 | } | |
158 | ||
4d284cac | 159 | static unsigned int |
1da177e4 LT |
160 | recs_per_track(struct dasd_eckd_characteristics * rdc, |
161 | unsigned int kl, unsigned int dl) | |
162 | { | |
163 | int dn, kn; | |
164 | ||
165 | switch (rdc->dev_type) { | |
166 | case 0x3380: | |
167 | if (kl) | |
168 | return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + | |
169 | ceil_quot(dl + 12, 32)); | |
170 | else | |
171 | return 1499 / (15 + ceil_quot(dl + 12, 32)); | |
172 | case 0x3390: | |
173 | dn = ceil_quot(dl + 6, 232) + 1; | |
174 | if (kl) { | |
175 | kn = ceil_quot(kl + 6, 232) + 1; | |
176 | return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + | |
177 | 9 + ceil_quot(dl + 6 * dn, 34)); | |
178 | } else | |
179 | return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); | |
180 | case 0x9345: | |
181 | dn = ceil_quot(dl + 6, 232) + 1; | |
182 | if (kl) { | |
183 | kn = ceil_quot(kl + 6, 232) + 1; | |
184 | return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + | |
185 | ceil_quot(dl + 6 * dn, 34)); | |
186 | } else | |
187 | return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); | |
188 | } | |
189 | return 0; | |
190 | } | |
191 | ||
b44b0ab3 SW |
192 | static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) |
193 | { | |
194 | geo->cyl = (__u16) cyl; | |
195 | geo->head = cyl >> 16; | |
196 | geo->head <<= 4; | |
197 | geo->head |= head; | |
198 | } | |
199 | ||
4d284cac | 200 | static int |
1da177e4 LT |
201 | check_XRC (struct ccw1 *de_ccw, |
202 | struct DE_eckd_data *data, | |
203 | struct dasd_device *device) | |
204 | { | |
205 | struct dasd_eckd_private *private; | |
d54853ef | 206 | int rc; |
1da177e4 LT |
207 | |
208 | private = (struct dasd_eckd_private *) device->private; | |
d54853ef MS |
209 | if (!private->rdc_data.facilities.XRC_supported) |
210 | return 0; | |
1da177e4 LT |
211 | |
212 | /* switch on System Time Stamp - needed for XRC Support */ | |
d54853ef MS |
213 | data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ |
214 | data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ | |
1da177e4 | 215 | |
d54853ef MS |
216 | rc = get_sync_clock(&data->ep_sys_time); |
217 | /* Ignore return code if sync clock is switched off. */ | |
a8f6db4d | 218 | if (rc == -EOPNOTSUPP || rc == -EACCES) |
d54853ef | 219 | rc = 0; |
1da177e4 | 220 | |
8e09f215 | 221 | de_ccw->count = sizeof(struct DE_eckd_data); |
d54853ef MS |
222 | de_ccw->flags |= CCW_FLAG_SLI; |
223 | return rc; | |
224 | } | |
1da177e4 | 225 | |
4d284cac | 226 | static int |
b44b0ab3 SW |
227 | define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, |
228 | unsigned int totrk, int cmd, struct dasd_device *device) | |
1da177e4 LT |
229 | { |
230 | struct dasd_eckd_private *private; | |
b44b0ab3 SW |
231 | u32 begcyl, endcyl; |
232 | u16 heads, beghead, endhead; | |
d54853ef | 233 | int rc = 0; |
1da177e4 LT |
234 | |
235 | private = (struct dasd_eckd_private *) device->private; | |
236 | ||
237 | ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; | |
238 | ccw->flags = 0; | |
239 | ccw->count = 16; | |
240 | ccw->cda = (__u32) __pa(data); | |
241 | ||
8e09f215 | 242 | memset(data, 0, sizeof(struct DE_eckd_data)); |
1da177e4 LT |
243 | switch (cmd) { |
244 | case DASD_ECKD_CCW_READ_HOME_ADDRESS: | |
245 | case DASD_ECKD_CCW_READ_RECORD_ZERO: | |
246 | case DASD_ECKD_CCW_READ: | |
247 | case DASD_ECKD_CCW_READ_MT: | |
248 | case DASD_ECKD_CCW_READ_CKD: | |
249 | case DASD_ECKD_CCW_READ_CKD_MT: | |
250 | case DASD_ECKD_CCW_READ_KD: | |
251 | case DASD_ECKD_CCW_READ_KD_MT: | |
252 | case DASD_ECKD_CCW_READ_COUNT: | |
253 | data->mask.perm = 0x1; | |
254 | data->attributes.operation = private->attrib.operation; | |
255 | break; | |
256 | case DASD_ECKD_CCW_WRITE: | |
257 | case DASD_ECKD_CCW_WRITE_MT: | |
258 | case DASD_ECKD_CCW_WRITE_KD: | |
259 | case DASD_ECKD_CCW_WRITE_KD_MT: | |
260 | data->mask.perm = 0x02; | |
261 | data->attributes.operation = private->attrib.operation; | |
d54853ef | 262 | rc = check_XRC (ccw, data, device); |
1da177e4 LT |
263 | break; |
264 | case DASD_ECKD_CCW_WRITE_CKD: | |
265 | case DASD_ECKD_CCW_WRITE_CKD_MT: | |
266 | data->attributes.operation = DASD_BYPASS_CACHE; | |
d54853ef | 267 | rc = check_XRC (ccw, data, device); |
1da177e4 LT |
268 | break; |
269 | case DASD_ECKD_CCW_ERASE: | |
270 | case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: | |
271 | case DASD_ECKD_CCW_WRITE_RECORD_ZERO: | |
272 | data->mask.perm = 0x3; | |
273 | data->mask.auth = 0x1; | |
274 | data->attributes.operation = DASD_BYPASS_CACHE; | |
d54853ef | 275 | rc = check_XRC (ccw, data, device); |
1da177e4 LT |
276 | break; |
277 | default: | |
fc19f381 SH |
278 | dev_err(&device->cdev->dev, |
279 | "0x%x is not a known command\n", cmd); | |
1da177e4 LT |
280 | break; |
281 | } | |
282 | ||
283 | data->attributes.mode = 0x3; /* ECKD */ | |
284 | ||
285 | if ((private->rdc_data.cu_type == 0x2105 || | |
286 | private->rdc_data.cu_type == 0x2107 || | |
287 | private->rdc_data.cu_type == 0x1750) | |
288 | && !(private->uses_cdl && trk < 2)) | |
289 | data->ga_extended |= 0x40; /* Regular Data Format Mode */ | |
290 | ||
b44b0ab3 SW |
291 | heads = private->rdc_data.trk_per_cyl; |
292 | begcyl = trk / heads; | |
293 | beghead = trk % heads; | |
294 | endcyl = totrk / heads; | |
295 | endhead = totrk % heads; | |
1da177e4 LT |
296 | |
297 | /* check for sequential prestage - enhance cylinder range */ | |
298 | if (data->attributes.operation == DASD_SEQ_PRESTAGE || | |
299 | data->attributes.operation == DASD_SEQ_ACCESS) { | |
138c014d | 300 | |
b44b0ab3 SW |
301 | if (endcyl + private->attrib.nr_cyl < private->real_cyl) |
302 | endcyl += private->attrib.nr_cyl; | |
1da177e4 | 303 | else |
b44b0ab3 | 304 | endcyl = (private->real_cyl - 1); |
1da177e4 LT |
305 | } |
306 | ||
b44b0ab3 SW |
307 | set_ch_t(&data->beg_ext, begcyl, beghead); |
308 | set_ch_t(&data->end_ext, endcyl, endhead); | |
d54853ef | 309 | return rc; |
1da177e4 LT |
310 | } |
311 | ||
8e09f215 SW |
312 | static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata, |
313 | struct dasd_device *device) | |
314 | { | |
315 | struct dasd_eckd_private *private; | |
316 | int rc; | |
317 | ||
318 | private = (struct dasd_eckd_private *) device->private; | |
319 | if (!private->rdc_data.facilities.XRC_supported) | |
320 | return 0; | |
321 | ||
322 | /* switch on System Time Stamp - needed for XRC Support */ | |
f3eb5384 SW |
323 | pfxdata->define_extent.ga_extended |= 0x08; /* 'Time Stamp Valid' */ |
324 | pfxdata->define_extent.ga_extended |= 0x02; /* 'Extended Parameter' */ | |
8e09f215 SW |
325 | pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ |
326 | ||
f3eb5384 | 327 | rc = get_sync_clock(&pfxdata->define_extent.ep_sys_time); |
8e09f215 | 328 | /* Ignore return code if sync clock is switched off. */ |
a8f6db4d | 329 | if (rc == -EOPNOTSUPP || rc == -EACCES) |
8e09f215 SW |
330 | rc = 0; |
331 | return rc; | |
332 | } | |
333 | ||
f3eb5384 SW |
334 | static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk, |
335 | unsigned int rec_on_trk, int count, int cmd, | |
336 | struct dasd_device *device, unsigned int reclen, | |
337 | unsigned int tlf) | |
338 | { | |
339 | struct dasd_eckd_private *private; | |
340 | int sector; | |
341 | int dn, d; | |
342 | ||
343 | private = (struct dasd_eckd_private *) device->private; | |
344 | ||
345 | memset(data, 0, sizeof(*data)); | |
346 | sector = 0; | |
347 | if (rec_on_trk) { | |
348 | switch (private->rdc_data.dev_type) { | |
349 | case 0x3390: | |
350 | dn = ceil_quot(reclen + 6, 232); | |
351 | d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); | |
352 | sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; | |
353 | break; | |
354 | case 0x3380: | |
355 | d = 7 + ceil_quot(reclen + 12, 32); | |
356 | sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; | |
357 | break; | |
358 | } | |
359 | } | |
360 | data->sector = sector; | |
361 | /* note: meaning of count depends on the operation | |
362 | * for record based I/O it's the number of records, but for | |
363 | * track based I/O it's the number of tracks | |
364 | */ | |
365 | data->count = count; | |
366 | switch (cmd) { | |
367 | case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: | |
368 | data->operation.orientation = 0x3; | |
369 | data->operation.operation = 0x03; | |
370 | break; | |
371 | case DASD_ECKD_CCW_READ_HOME_ADDRESS: | |
372 | data->operation.orientation = 0x3; | |
373 | data->operation.operation = 0x16; | |
374 | break; | |
375 | case DASD_ECKD_CCW_WRITE_RECORD_ZERO: | |
376 | data->operation.orientation = 0x1; | |
377 | data->operation.operation = 0x03; | |
378 | data->count++; | |
379 | break; | |
380 | case DASD_ECKD_CCW_READ_RECORD_ZERO: | |
381 | data->operation.orientation = 0x3; | |
382 | data->operation.operation = 0x16; | |
383 | data->count++; | |
384 | break; | |
385 | case DASD_ECKD_CCW_WRITE: | |
386 | case DASD_ECKD_CCW_WRITE_MT: | |
387 | case DASD_ECKD_CCW_WRITE_KD: | |
388 | case DASD_ECKD_CCW_WRITE_KD_MT: | |
389 | data->auxiliary.length_valid = 0x1; | |
390 | data->length = reclen; | |
391 | data->operation.operation = 0x01; | |
392 | break; | |
393 | case DASD_ECKD_CCW_WRITE_CKD: | |
394 | case DASD_ECKD_CCW_WRITE_CKD_MT: | |
395 | data->auxiliary.length_valid = 0x1; | |
396 | data->length = reclen; | |
397 | data->operation.operation = 0x03; | |
398 | break; | |
e4dbb0f2 SH |
399 | case DASD_ECKD_CCW_WRITE_FULL_TRACK: |
400 | data->operation.orientation = 0x0; | |
401 | data->operation.operation = 0x3F; | |
402 | data->extended_operation = 0x11; | |
403 | data->length = 0; | |
404 | data->extended_parameter_length = 0x02; | |
405 | if (data->count > 8) { | |
406 | data->extended_parameter[0] = 0xFF; | |
407 | data->extended_parameter[1] = 0xFF; | |
408 | data->extended_parameter[1] <<= (16 - count); | |
409 | } else { | |
410 | data->extended_parameter[0] = 0xFF; | |
411 | data->extended_parameter[0] <<= (8 - count); | |
412 | data->extended_parameter[1] = 0x00; | |
413 | } | |
414 | data->sector = 0xFF; | |
415 | break; | |
f3eb5384 SW |
416 | case DASD_ECKD_CCW_WRITE_TRACK_DATA: |
417 | data->auxiliary.length_valid = 0x1; | |
418 | data->length = reclen; /* not tlf, as one might think */ | |
419 | data->operation.operation = 0x3F; | |
420 | data->extended_operation = 0x23; | |
421 | break; | |
422 | case DASD_ECKD_CCW_READ: | |
423 | case DASD_ECKD_CCW_READ_MT: | |
424 | case DASD_ECKD_CCW_READ_KD: | |
425 | case DASD_ECKD_CCW_READ_KD_MT: | |
426 | data->auxiliary.length_valid = 0x1; | |
427 | data->length = reclen; | |
428 | data->operation.operation = 0x06; | |
429 | break; | |
430 | case DASD_ECKD_CCW_READ_CKD: | |
431 | case DASD_ECKD_CCW_READ_CKD_MT: | |
432 | data->auxiliary.length_valid = 0x1; | |
433 | data->length = reclen; | |
434 | data->operation.operation = 0x16; | |
435 | break; | |
436 | case DASD_ECKD_CCW_READ_COUNT: | |
437 | data->operation.operation = 0x06; | |
438 | break; | |
e4dbb0f2 SH |
439 | case DASD_ECKD_CCW_READ_TRACK: |
440 | data->operation.orientation = 0x1; | |
441 | data->operation.operation = 0x0C; | |
442 | data->extended_parameter_length = 0; | |
443 | data->sector = 0xFF; | |
444 | break; | |
f3eb5384 SW |
445 | case DASD_ECKD_CCW_READ_TRACK_DATA: |
446 | data->auxiliary.length_valid = 0x1; | |
447 | data->length = tlf; | |
448 | data->operation.operation = 0x0C; | |
449 | break; | |
450 | case DASD_ECKD_CCW_ERASE: | |
451 | data->length = reclen; | |
452 | data->auxiliary.length_valid = 0x1; | |
453 | data->operation.operation = 0x0b; | |
454 | break; | |
455 | default: | |
456 | DBF_DEV_EVENT(DBF_ERR, device, | |
457 | "fill LRE unknown opcode 0x%x", cmd); | |
458 | BUG(); | |
459 | } | |
460 | set_ch_t(&data->seek_addr, | |
461 | trk / private->rdc_data.trk_per_cyl, | |
462 | trk % private->rdc_data.trk_per_cyl); | |
463 | data->search_arg.cyl = data->seek_addr.cyl; | |
464 | data->search_arg.head = data->seek_addr.head; | |
465 | data->search_arg.record = rec_on_trk; | |
466 | } | |
467 | ||
468 | static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, | |
469 | unsigned int trk, unsigned int totrk, int cmd, | |
470 | struct dasd_device *basedev, struct dasd_device *startdev, | |
471 | unsigned char format, unsigned int rec_on_trk, int count, | |
472 | unsigned int blksize, unsigned int tlf) | |
8e09f215 SW |
473 | { |
474 | struct dasd_eckd_private *basepriv, *startpriv; | |
f3eb5384 SW |
475 | struct DE_eckd_data *dedata; |
476 | struct LRE_eckd_data *lredata; | |
b44b0ab3 SW |
477 | u32 begcyl, endcyl; |
478 | u16 heads, beghead, endhead; | |
8e09f215 SW |
479 | int rc = 0; |
480 | ||
481 | basepriv = (struct dasd_eckd_private *) basedev->private; | |
482 | startpriv = (struct dasd_eckd_private *) startdev->private; | |
f3eb5384 SW |
483 | dedata = &pfxdata->define_extent; |
484 | lredata = &pfxdata->locate_record; | |
8e09f215 SW |
485 | |
486 | ccw->cmd_code = DASD_ECKD_CCW_PFX; | |
487 | ccw->flags = 0; | |
e4dbb0f2 SH |
488 | if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) { |
489 | ccw->count = sizeof(*pfxdata) + 2; | |
490 | ccw->cda = (__u32) __pa(pfxdata); | |
491 | memset(pfxdata, 0, sizeof(*pfxdata) + 2); | |
492 | } else { | |
493 | ccw->count = sizeof(*pfxdata); | |
494 | ccw->cda = (__u32) __pa(pfxdata); | |
495 | memset(pfxdata, 0, sizeof(*pfxdata)); | |
496 | } | |
8e09f215 | 497 | |
8e09f215 | 498 | /* prefix data */ |
f3eb5384 SW |
499 | if (format > 1) { |
500 | DBF_DEV_EVENT(DBF_ERR, basedev, | |
501 | "PFX LRE unknown format 0x%x", format); | |
502 | BUG(); | |
503 | return -EINVAL; | |
504 | } | |
505 | pfxdata->format = format; | |
4abb08c2 SW |
506 | pfxdata->base_address = basepriv->ned->unit_addr; |
507 | pfxdata->base_lss = basepriv->ned->ID; | |
f3eb5384 | 508 | pfxdata->validity.define_extent = 1; |
8e09f215 SW |
509 | |
510 | /* private uid is kept up to date, conf_data may be outdated */ | |
511 | if (startpriv->uid.type != UA_BASE_DEVICE) { | |
512 | pfxdata->validity.verify_base = 1; | |
513 | if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) | |
514 | pfxdata->validity.hyper_pav = 1; | |
515 | } | |
516 | ||
517 | /* define extend data (mostly)*/ | |
518 | switch (cmd) { | |
519 | case DASD_ECKD_CCW_READ_HOME_ADDRESS: | |
520 | case DASD_ECKD_CCW_READ_RECORD_ZERO: | |
521 | case DASD_ECKD_CCW_READ: | |
522 | case DASD_ECKD_CCW_READ_MT: | |
523 | case DASD_ECKD_CCW_READ_CKD: | |
524 | case DASD_ECKD_CCW_READ_CKD_MT: | |
525 | case DASD_ECKD_CCW_READ_KD: | |
526 | case DASD_ECKD_CCW_READ_KD_MT: | |
527 | case DASD_ECKD_CCW_READ_COUNT: | |
f3eb5384 SW |
528 | dedata->mask.perm = 0x1; |
529 | dedata->attributes.operation = basepriv->attrib.operation; | |
530 | break; | |
e4dbb0f2 | 531 | case DASD_ECKD_CCW_READ_TRACK: |
f3eb5384 SW |
532 | case DASD_ECKD_CCW_READ_TRACK_DATA: |
533 | dedata->mask.perm = 0x1; | |
534 | dedata->attributes.operation = basepriv->attrib.operation; | |
535 | dedata->blk_size = 0; | |
8e09f215 SW |
536 | break; |
537 | case DASD_ECKD_CCW_WRITE: | |
538 | case DASD_ECKD_CCW_WRITE_MT: | |
539 | case DASD_ECKD_CCW_WRITE_KD: | |
540 | case DASD_ECKD_CCW_WRITE_KD_MT: | |
f3eb5384 SW |
541 | dedata->mask.perm = 0x02; |
542 | dedata->attributes.operation = basepriv->attrib.operation; | |
8e09f215 SW |
543 | rc = check_XRC_on_prefix(pfxdata, basedev); |
544 | break; | |
545 | case DASD_ECKD_CCW_WRITE_CKD: | |
546 | case DASD_ECKD_CCW_WRITE_CKD_MT: | |
f3eb5384 | 547 | dedata->attributes.operation = DASD_BYPASS_CACHE; |
8e09f215 SW |
548 | rc = check_XRC_on_prefix(pfxdata, basedev); |
549 | break; | |
550 | case DASD_ECKD_CCW_ERASE: | |
551 | case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: | |
552 | case DASD_ECKD_CCW_WRITE_RECORD_ZERO: | |
f3eb5384 SW |
553 | dedata->mask.perm = 0x3; |
554 | dedata->mask.auth = 0x1; | |
555 | dedata->attributes.operation = DASD_BYPASS_CACHE; | |
8e09f215 SW |
556 | rc = check_XRC_on_prefix(pfxdata, basedev); |
557 | break; | |
e4dbb0f2 SH |
558 | case DASD_ECKD_CCW_WRITE_FULL_TRACK: |
559 | dedata->mask.perm = 0x03; | |
560 | dedata->attributes.operation = basepriv->attrib.operation; | |
561 | dedata->blk_size = 0; | |
562 | break; | |
f3eb5384 SW |
563 | case DASD_ECKD_CCW_WRITE_TRACK_DATA: |
564 | dedata->mask.perm = 0x02; | |
565 | dedata->attributes.operation = basepriv->attrib.operation; | |
566 | dedata->blk_size = blksize; | |
567 | rc = check_XRC_on_prefix(pfxdata, basedev); | |
8e09f215 | 568 | break; |
f3eb5384 SW |
569 | default: |
570 | DBF_DEV_EVENT(DBF_ERR, basedev, | |
571 | "PFX LRE unknown opcode 0x%x", cmd); | |
572 | BUG(); | |
573 | return -EINVAL; | |
8e09f215 SW |
574 | } |
575 | ||
f3eb5384 | 576 | dedata->attributes.mode = 0x3; /* ECKD */ |
8e09f215 SW |
577 | |
578 | if ((basepriv->rdc_data.cu_type == 0x2105 || | |
579 | basepriv->rdc_data.cu_type == 0x2107 || | |
580 | basepriv->rdc_data.cu_type == 0x1750) | |
581 | && !(basepriv->uses_cdl && trk < 2)) | |
f3eb5384 | 582 | dedata->ga_extended |= 0x40; /* Regular Data Format Mode */ |
8e09f215 | 583 | |
b44b0ab3 SW |
584 | heads = basepriv->rdc_data.trk_per_cyl; |
585 | begcyl = trk / heads; | |
586 | beghead = trk % heads; | |
587 | endcyl = totrk / heads; | |
588 | endhead = totrk % heads; | |
8e09f215 SW |
589 | |
590 | /* check for sequential prestage - enhance cylinder range */ | |
f3eb5384 SW |
591 | if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || |
592 | dedata->attributes.operation == DASD_SEQ_ACCESS) { | |
8e09f215 | 593 | |
b44b0ab3 SW |
594 | if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) |
595 | endcyl += basepriv->attrib.nr_cyl; | |
8e09f215 | 596 | else |
b44b0ab3 | 597 | endcyl = (basepriv->real_cyl - 1); |
8e09f215 SW |
598 | } |
599 | ||
f3eb5384 SW |
600 | set_ch_t(&dedata->beg_ext, begcyl, beghead); |
601 | set_ch_t(&dedata->end_ext, endcyl, endhead); | |
602 | ||
603 | if (format == 1) { | |
604 | fill_LRE_data(lredata, trk, rec_on_trk, count, cmd, | |
605 | basedev, blksize, tlf); | |
606 | } | |
607 | ||
8e09f215 SW |
608 | return rc; |
609 | } | |
610 | ||
f3eb5384 SW |
611 | static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, |
612 | unsigned int trk, unsigned int totrk, int cmd, | |
613 | struct dasd_device *basedev, struct dasd_device *startdev) | |
614 | { | |
615 | return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev, | |
616 | 0, 0, 0, 0, 0); | |
617 | } | |
618 | ||
4d284cac | 619 | static void |
b44b0ab3 SW |
620 | locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, |
621 | unsigned int rec_on_trk, int no_rec, int cmd, | |
1da177e4 LT |
622 | struct dasd_device * device, int reclen) |
623 | { | |
624 | struct dasd_eckd_private *private; | |
625 | int sector; | |
626 | int dn, d; | |
138c014d | 627 | |
1da177e4 LT |
628 | private = (struct dasd_eckd_private *) device->private; |
629 | ||
630 | DBF_DEV_EVENT(DBF_INFO, device, | |
631 | "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", | |
632 | trk, rec_on_trk, no_rec, cmd, reclen); | |
633 | ||
634 | ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; | |
635 | ccw->flags = 0; | |
636 | ccw->count = 16; | |
637 | ccw->cda = (__u32) __pa(data); | |
638 | ||
8e09f215 | 639 | memset(data, 0, sizeof(struct LO_eckd_data)); |
1da177e4 LT |
640 | sector = 0; |
641 | if (rec_on_trk) { | |
642 | switch (private->rdc_data.dev_type) { | |
643 | case 0x3390: | |
644 | dn = ceil_quot(reclen + 6, 232); | |
645 | d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); | |
646 | sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; | |
647 | break; | |
648 | case 0x3380: | |
649 | d = 7 + ceil_quot(reclen + 12, 32); | |
650 | sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; | |
651 | break; | |
652 | } | |
653 | } | |
654 | data->sector = sector; | |
655 | data->count = no_rec; | |
656 | switch (cmd) { | |
657 | case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: | |
658 | data->operation.orientation = 0x3; | |
659 | data->operation.operation = 0x03; | |
660 | break; | |
661 | case DASD_ECKD_CCW_READ_HOME_ADDRESS: | |
662 | data->operation.orientation = 0x3; | |
663 | data->operation.operation = 0x16; | |
664 | break; | |
665 | case DASD_ECKD_CCW_WRITE_RECORD_ZERO: | |
666 | data->operation.orientation = 0x1; | |
667 | data->operation.operation = 0x03; | |
668 | data->count++; | |
669 | break; | |
670 | case DASD_ECKD_CCW_READ_RECORD_ZERO: | |
671 | data->operation.orientation = 0x3; | |
672 | data->operation.operation = 0x16; | |
673 | data->count++; | |
674 | break; | |
675 | case DASD_ECKD_CCW_WRITE: | |
676 | case DASD_ECKD_CCW_WRITE_MT: | |
677 | case DASD_ECKD_CCW_WRITE_KD: | |
678 | case DASD_ECKD_CCW_WRITE_KD_MT: | |
679 | data->auxiliary.last_bytes_used = 0x1; | |
680 | data->length = reclen; | |
681 | data->operation.operation = 0x01; | |
682 | break; | |
683 | case DASD_ECKD_CCW_WRITE_CKD: | |
684 | case DASD_ECKD_CCW_WRITE_CKD_MT: | |
685 | data->auxiliary.last_bytes_used = 0x1; | |
686 | data->length = reclen; | |
687 | data->operation.operation = 0x03; | |
688 | break; | |
689 | case DASD_ECKD_CCW_READ: | |
690 | case DASD_ECKD_CCW_READ_MT: | |
691 | case DASD_ECKD_CCW_READ_KD: | |
692 | case DASD_ECKD_CCW_READ_KD_MT: | |
693 | data->auxiliary.last_bytes_used = 0x1; | |
694 | data->length = reclen; | |
695 | data->operation.operation = 0x06; | |
696 | break; | |
697 | case DASD_ECKD_CCW_READ_CKD: | |
698 | case DASD_ECKD_CCW_READ_CKD_MT: | |
699 | data->auxiliary.last_bytes_used = 0x1; | |
700 | data->length = reclen; | |
701 | data->operation.operation = 0x16; | |
702 | break; | |
703 | case DASD_ECKD_CCW_READ_COUNT: | |
704 | data->operation.operation = 0x06; | |
705 | break; | |
706 | case DASD_ECKD_CCW_ERASE: | |
707 | data->length = reclen; | |
708 | data->auxiliary.last_bytes_used = 0x1; | |
709 | data->operation.operation = 0x0b; | |
710 | break; | |
711 | default: | |
fc19f381 SH |
712 | DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record " |
713 | "opcode 0x%x", cmd); | |
1da177e4 | 714 | } |
b44b0ab3 SW |
715 | set_ch_t(&data->seek_addr, |
716 | trk / private->rdc_data.trk_per_cyl, | |
717 | trk % private->rdc_data.trk_per_cyl); | |
718 | data->search_arg.cyl = data->seek_addr.cyl; | |
719 | data->search_arg.head = data->seek_addr.head; | |
1da177e4 LT |
720 | data->search_arg.record = rec_on_trk; |
721 | } | |
722 | ||
723 | /* | |
724 | * Returns 1 if the block is one of the special blocks that needs | |
725 | * to get read/written with the KD variant of the command. | |
726 | * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and | |
727 | * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. | |
728 | * Luckily the KD variants differ only by one bit (0x08) from the | |
729 | * normal variant. So don't wonder about code like: | |
730 | * if (dasd_eckd_cdl_special(blk_per_trk, recid)) | |
731 | * ccw->cmd_code |= 0x8; | |
732 | */ | |
733 | static inline int | |
734 | dasd_eckd_cdl_special(int blk_per_trk, int recid) | |
735 | { | |
736 | if (recid < 3) | |
737 | return 1; | |
738 | if (recid < blk_per_trk) | |
739 | return 0; | |
740 | if (recid < 2 * blk_per_trk) | |
741 | return 1; | |
742 | return 0; | |
743 | } | |
744 | ||
745 | /* | |
746 | * Returns the record size for the special blocks of the cdl format. | |
747 | * Only returns something useful if dasd_eckd_cdl_special is true | |
748 | * for the recid. | |
749 | */ | |
750 | static inline int | |
751 | dasd_eckd_cdl_reclen(int recid) | |
752 | { | |
753 | if (recid < 3) | |
754 | return sizes_trk0[recid]; | |
755 | return LABEL_SIZE; | |
756 | } | |
b206181d SH |
757 | /* create unique id from private structure. */ |
758 | static void create_uid(struct dasd_eckd_private *private) | |
3d052595 | 759 | { |
4abb08c2 | 760 | int count; |
b206181d | 761 | struct dasd_uid *uid; |
3d052595 | 762 | |
2dedf0d9 | 763 | uid = &private->uid; |
3d052595 | 764 | memset(uid, 0, sizeof(struct dasd_uid)); |
4abb08c2 | 765 | memcpy(uid->vendor, private->ned->HDA_manufacturer, |
d0710c7c | 766 | sizeof(uid->vendor) - 1); |
3d052595 | 767 | EBCASC(uid->vendor, sizeof(uid->vendor) - 1); |
4abb08c2 | 768 | memcpy(uid->serial, private->ned->HDA_location, |
d0710c7c | 769 | sizeof(uid->serial) - 1); |
3d052595 | 770 | EBCASC(uid->serial, sizeof(uid->serial) - 1); |
4abb08c2 | 771 | uid->ssid = private->gneq->subsystemID; |
a419aef8 | 772 | uid->real_unit_addr = private->ned->unit_addr; |
4abb08c2 SW |
773 | if (private->sneq) { |
774 | uid->type = private->sneq->sua_flags; | |
8e09f215 | 775 | if (uid->type == UA_BASE_PAV_ALIAS) |
4abb08c2 | 776 | uid->base_unit_addr = private->sneq->base_unit_addr; |
8e09f215 SW |
777 | } else { |
778 | uid->type = UA_BASE_DEVICE; | |
779 | } | |
4abb08c2 SW |
780 | if (private->vdsneq) { |
781 | for (count = 0; count < 16; count++) { | |
782 | sprintf(uid->vduit+2*count, "%02x", | |
783 | private->vdsneq->uit[count]); | |
784 | } | |
785 | } | |
b206181d SH |
786 | } |
787 | ||
788 | /* | |
789 | * Generate device unique id that specifies the physical device. | |
790 | */ | |
791 | static int dasd_eckd_generate_uid(struct dasd_device *device) | |
792 | { | |
793 | struct dasd_eckd_private *private; | |
794 | unsigned long flags; | |
795 | ||
796 | private = (struct dasd_eckd_private *) device->private; | |
797 | if (!private) | |
798 | return -ENODEV; | |
799 | if (!private->ned || !private->gneq) | |
800 | return -ENODEV; | |
801 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); | |
802 | create_uid(private); | |
2dedf0d9 | 803 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
3d052595 HH |
804 | return 0; |
805 | } | |
806 | ||
2dedf0d9 SH |
807 | static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid) |
808 | { | |
809 | struct dasd_eckd_private *private; | |
810 | unsigned long flags; | |
811 | ||
812 | if (device->private) { | |
813 | private = (struct dasd_eckd_private *)device->private; | |
814 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); | |
815 | *uid = private->uid; | |
816 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); | |
817 | return 0; | |
818 | } | |
819 | return -EINVAL; | |
820 | } | |
821 | ||
b206181d SH |
822 | /* |
823 | * compare device UID with data of a given dasd_eckd_private structure | |
824 | * return 0 for match | |
825 | */ | |
826 | static int dasd_eckd_compare_path_uid(struct dasd_device *device, | |
827 | struct dasd_eckd_private *private) | |
828 | { | |
829 | struct dasd_uid device_uid; | |
830 | ||
831 | create_uid(private); | |
832 | dasd_eckd_get_uid(device, &device_uid); | |
833 | ||
834 | return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid)); | |
835 | } | |
836 | ||
a4d26c6a SW |
837 | static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device, |
838 | struct dasd_ccw_req *cqr, | |
839 | __u8 *rcd_buffer, | |
840 | __u8 lpm) | |
17283b56 | 841 | { |
17283b56 | 842 | struct ccw1 *ccw; |
a4d26c6a SW |
843 | /* |
844 | * buffer has to start with EBCDIC "V1.0" to show | |
845 | * support for virtual device SNEQ | |
846 | */ | |
847 | rcd_buffer[0] = 0xE5; | |
848 | rcd_buffer[1] = 0xF1; | |
849 | rcd_buffer[2] = 0x4B; | |
850 | rcd_buffer[3] = 0xF0; | |
17283b56 CH |
851 | |
852 | ccw = cqr->cpaddr; | |
a4d26c6a SW |
853 | ccw->cmd_code = DASD_ECKD_CCW_RCD; |
854 | ccw->flags = 0; | |
17283b56 | 855 | ccw->cda = (__u32)(addr_t)rcd_buffer; |
a4d26c6a SW |
856 | ccw->count = DASD_ECKD_RCD_DATA_SIZE; |
857 | cqr->magic = DASD_ECKD_MAGIC; | |
17283b56 | 858 | |
8e09f215 SW |
859 | cqr->startdev = device; |
860 | cqr->memdev = device; | |
861 | cqr->block = NULL; | |
17283b56 CH |
862 | cqr->expires = 10*HZ; |
863 | cqr->lpm = lpm; | |
eb6e199b | 864 | cqr->retries = 256; |
1aae0560 | 865 | cqr->buildclk = get_tod_clock(); |
17283b56 | 866 | cqr->status = DASD_CQR_FILLED; |
a4d26c6a SW |
867 | set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); |
868 | } | |
869 | ||
5915a873 SH |
870 | /* |
871 | * Wakeup helper for read_conf | |
872 | * if the cqr is not done and needs some error recovery | |
873 | * the buffer has to be re-initialized with the EBCDIC "V1.0" | |
874 | * to show support for virtual device SNEQ | |
875 | */ | |
876 | static void read_conf_cb(struct dasd_ccw_req *cqr, void *data) | |
877 | { | |
878 | struct ccw1 *ccw; | |
879 | __u8 *rcd_buffer; | |
880 | ||
881 | if (cqr->status != DASD_CQR_DONE) { | |
882 | ccw = cqr->cpaddr; | |
883 | rcd_buffer = (__u8 *)((addr_t) ccw->cda); | |
884 | memset(rcd_buffer, 0, sizeof(*rcd_buffer)); | |
885 | ||
886 | rcd_buffer[0] = 0xE5; | |
887 | rcd_buffer[1] = 0xF1; | |
888 | rcd_buffer[2] = 0x4B; | |
889 | rcd_buffer[3] = 0xF0; | |
890 | } | |
891 | dasd_wakeup_cb(cqr, data); | |
892 | } | |
893 | ||
a4d26c6a SW |
894 | static int dasd_eckd_read_conf_immediately(struct dasd_device *device, |
895 | struct dasd_ccw_req *cqr, | |
896 | __u8 *rcd_buffer, | |
897 | __u8 lpm) | |
898 | { | |
899 | struct ciw *ciw; | |
900 | int rc; | |
901 | /* | |
902 | * sanity check: scan for RCD command in extended SenseID data | |
903 | * some devices do not support RCD | |
904 | */ | |
905 | ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); | |
906 | if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) | |
907 | return -EOPNOTSUPP; | |
908 | ||
909 | dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm); | |
910 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); | |
5a27e60d | 911 | set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); |
a4d26c6a | 912 | cqr->retries = 5; |
5915a873 | 913 | cqr->callback = read_conf_cb; |
a4d26c6a SW |
914 | rc = dasd_sleep_on_immediatly(cqr); |
915 | return rc; | |
17283b56 CH |
916 | } |
917 | ||
918 | static int dasd_eckd_read_conf_lpm(struct dasd_device *device, | |
919 | void **rcd_buffer, | |
920 | int *rcd_buffer_size, __u8 lpm) | |
921 | { | |
922 | struct ciw *ciw; | |
923 | char *rcd_buf = NULL; | |
924 | int ret; | |
925 | struct dasd_ccw_req *cqr; | |
926 | ||
927 | /* | |
a4d26c6a SW |
928 | * sanity check: scan for RCD command in extended SenseID data |
929 | * some devices do not support RCD | |
17283b56 CH |
930 | */ |
931 | ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); | |
a4d26c6a | 932 | if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) { |
17283b56 CH |
933 | ret = -EOPNOTSUPP; |
934 | goto out_error; | |
935 | } | |
a4d26c6a | 936 | rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA); |
17283b56 CH |
937 | if (!rcd_buf) { |
938 | ret = -ENOMEM; | |
939 | goto out_error; | |
940 | } | |
a4d26c6a SW |
941 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, |
942 | 0, /* use rcd_buf as data ara */ | |
943 | device); | |
17283b56 | 944 | if (IS_ERR(cqr)) { |
a4d26c6a SW |
945 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
946 | "Could not allocate RCD request"); | |
947 | ret = -ENOMEM; | |
17283b56 CH |
948 | goto out_error; |
949 | } | |
a4d26c6a | 950 | dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm); |
5915a873 | 951 | cqr->callback = read_conf_cb; |
17283b56 CH |
952 | ret = dasd_sleep_on(cqr); |
953 | /* | |
954 | * on success we update the user input parms | |
955 | */ | |
8e09f215 | 956 | dasd_sfree_request(cqr, cqr->memdev); |
17283b56 CH |
957 | if (ret) |
958 | goto out_error; | |
959 | ||
a4d26c6a | 960 | *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE; |
17283b56 CH |
961 | *rcd_buffer = rcd_buf; |
962 | return 0; | |
963 | out_error: | |
964 | kfree(rcd_buf); | |
965 | *rcd_buffer = NULL; | |
966 | *rcd_buffer_size = 0; | |
967 | return ret; | |
968 | } | |
969 | ||
4abb08c2 SW |
970 | static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) |
971 | { | |
972 | ||
973 | struct dasd_sneq *sneq; | |
974 | int i, count; | |
975 | ||
976 | private->ned = NULL; | |
977 | private->sneq = NULL; | |
978 | private->vdsneq = NULL; | |
979 | private->gneq = NULL; | |
980 | count = private->conf_len / sizeof(struct dasd_sneq); | |
981 | sneq = (struct dasd_sneq *)private->conf_data; | |
982 | for (i = 0; i < count; ++i) { | |
983 | if (sneq->flags.identifier == 1 && sneq->format == 1) | |
984 | private->sneq = sneq; | |
985 | else if (sneq->flags.identifier == 1 && sneq->format == 4) | |
986 | private->vdsneq = (struct vd_sneq *)sneq; | |
987 | else if (sneq->flags.identifier == 2) | |
988 | private->gneq = (struct dasd_gneq *)sneq; | |
989 | else if (sneq->flags.identifier == 3 && sneq->res1 == 1) | |
990 | private->ned = (struct dasd_ned *)sneq; | |
991 | sneq++; | |
992 | } | |
993 | if (!private->ned || !private->gneq) { | |
994 | private->ned = NULL; | |
995 | private->sneq = NULL; | |
996 | private->vdsneq = NULL; | |
997 | private->gneq = NULL; | |
998 | return -EINVAL; | |
999 | } | |
1000 | return 0; | |
1001 | ||
1002 | }; | |
1003 | ||
1004 | static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) | |
1005 | { | |
1006 | struct dasd_gneq *gneq; | |
1007 | int i, count, found; | |
1008 | ||
1009 | count = conf_len / sizeof(*gneq); | |
1010 | gneq = (struct dasd_gneq *)conf_data; | |
1011 | found = 0; | |
1012 | for (i = 0; i < count; ++i) { | |
1013 | if (gneq->flags.identifier == 2) { | |
1014 | found = 1; | |
1015 | break; | |
1016 | } | |
1017 | gneq++; | |
1018 | } | |
1019 | if (found) | |
1020 | return ((char *)gneq)[18] & 0x07; | |
1021 | else | |
1022 | return 0; | |
1023 | } | |
1024 | ||
1025 | static int dasd_eckd_read_conf(struct dasd_device *device) | |
1da177e4 LT |
1026 | { |
1027 | void *conf_data; | |
1028 | int conf_len, conf_data_saved; | |
55d3a85c | 1029 | int rc, path_err; |
a4d26c6a | 1030 | __u8 lpm, opm; |
b206181d | 1031 | struct dasd_eckd_private *private, path_private; |
a4d26c6a | 1032 | struct dasd_path *path_data; |
b206181d SH |
1033 | struct dasd_uid *uid; |
1034 | char print_path_uid[60], print_device_uid[60]; | |
1da177e4 LT |
1035 | |
1036 | private = (struct dasd_eckd_private *) device->private; | |
a4d26c6a SW |
1037 | path_data = &device->path_data; |
1038 | opm = ccw_device_get_path_mask(device->cdev); | |
1da177e4 | 1039 | conf_data_saved = 0; |
55d3a85c | 1040 | path_err = 0; |
1da177e4 LT |
1041 | /* get configuration data per operational path */ |
1042 | for (lpm = 0x80; lpm; lpm>>= 1) { | |
b206181d SH |
1043 | if (!(lpm & opm)) |
1044 | continue; | |
1045 | rc = dasd_eckd_read_conf_lpm(device, &conf_data, | |
1046 | &conf_len, lpm); | |
1047 | if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ | |
1048 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, | |
1049 | "Read configuration data returned " | |
1050 | "error %d", rc); | |
1051 | return rc; | |
1052 | } | |
1053 | if (conf_data == NULL) { | |
1054 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
1055 | "No configuration data " | |
1056 | "retrieved"); | |
1057 | /* no further analysis possible */ | |
1058 | path_data->opm |= lpm; | |
1059 | continue; /* no error */ | |
1060 | } | |
1061 | /* save first valid configuration data */ | |
1062 | if (!conf_data_saved) { | |
1063 | kfree(private->conf_data); | |
1064 | private->conf_data = conf_data; | |
1065 | private->conf_len = conf_len; | |
1066 | if (dasd_eckd_identify_conf_parts(private)) { | |
1067 | private->conf_data = NULL; | |
1068 | private->conf_len = 0; | |
1069 | kfree(conf_data); | |
1070 | continue; | |
1da177e4 | 1071 | } |
b206181d SH |
1072 | /* |
1073 | * build device UID that other path data | |
1074 | * can be compared to it | |
1075 | */ | |
1076 | dasd_eckd_generate_uid(device); | |
1077 | conf_data_saved++; | |
1078 | } else { | |
1079 | path_private.conf_data = conf_data; | |
1080 | path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; | |
1081 | if (dasd_eckd_identify_conf_parts( | |
1082 | &path_private)) { | |
1083 | path_private.conf_data = NULL; | |
1084 | path_private.conf_len = 0; | |
1085 | kfree(conf_data); | |
1086 | continue; | |
1da177e4 | 1087 | } |
b206181d SH |
1088 | |
1089 | if (dasd_eckd_compare_path_uid( | |
1090 | device, &path_private)) { | |
1091 | uid = &path_private.uid; | |
1092 | if (strlen(uid->vduit) > 0) | |
1093 | snprintf(print_path_uid, | |
1094 | sizeof(print_path_uid), | |
1095 | "%s.%s.%04x.%02x.%s", | |
1096 | uid->vendor, uid->serial, | |
1097 | uid->ssid, uid->real_unit_addr, | |
1098 | uid->vduit); | |
1099 | else | |
1100 | snprintf(print_path_uid, | |
1101 | sizeof(print_path_uid), | |
1102 | "%s.%s.%04x.%02x", | |
1103 | uid->vendor, uid->serial, | |
1104 | uid->ssid, | |
1105 | uid->real_unit_addr); | |
1106 | uid = &private->uid; | |
1107 | if (strlen(uid->vduit) > 0) | |
1108 | snprintf(print_device_uid, | |
1109 | sizeof(print_device_uid), | |
1110 | "%s.%s.%04x.%02x.%s", | |
1111 | uid->vendor, uid->serial, | |
1112 | uid->ssid, uid->real_unit_addr, | |
1113 | uid->vduit); | |
1114 | else | |
1115 | snprintf(print_device_uid, | |
1116 | sizeof(print_device_uid), | |
1117 | "%s.%s.%04x.%02x", | |
1118 | uid->vendor, uid->serial, | |
1119 | uid->ssid, | |
1120 | uid->real_unit_addr); | |
1121 | dev_err(&device->cdev->dev, | |
1122 | "Not all channel paths lead to " | |
1123 | "the same device, path %02X leads to " | |
1124 | "device %s instead of %s\n", lpm, | |
1125 | print_path_uid, print_device_uid); | |
55d3a85c SH |
1126 | path_err = -EINVAL; |
1127 | continue; | |
1da177e4 | 1128 | } |
b206181d SH |
1129 | |
1130 | path_private.conf_data = NULL; | |
1131 | path_private.conf_len = 0; | |
1132 | } | |
1133 | switch (dasd_eckd_path_access(conf_data, conf_len)) { | |
1134 | case 0x02: | |
1135 | path_data->npm |= lpm; | |
1136 | break; | |
1137 | case 0x03: | |
1138 | path_data->ppm |= lpm; | |
1139 | break; | |
1da177e4 | 1140 | } |
b206181d SH |
1141 | path_data->opm |= lpm; |
1142 | ||
1143 | if (conf_data != private->conf_data) | |
1144 | kfree(conf_data); | |
1da177e4 | 1145 | } |
b206181d | 1146 | |
55d3a85c | 1147 | return path_err; |
1da177e4 LT |
1148 | } |
1149 | ||
a4d26c6a SW |
1150 | static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) |
1151 | { | |
1152 | struct dasd_eckd_private *private; | |
1153 | int mdc; | |
1154 | u32 fcx_max_data; | |
1155 | ||
1156 | private = (struct dasd_eckd_private *) device->private; | |
1157 | if (private->fcx_max_data) { | |
1158 | mdc = ccw_device_get_mdc(device->cdev, lpm); | |
1159 | if ((mdc < 0)) { | |
1160 | dev_warn(&device->cdev->dev, | |
1161 | "Detecting the maximum data size for zHPF " | |
1162 | "requests failed (rc=%d) for a new path %x\n", | |
1163 | mdc, lpm); | |
1164 | return mdc; | |
1165 | } | |
1166 | fcx_max_data = mdc * FCX_MAX_DATA_FACTOR; | |
1167 | if (fcx_max_data < private->fcx_max_data) { | |
1168 | dev_warn(&device->cdev->dev, | |
1169 | "The maximum data size for zHPF requests %u " | |
1170 | "on a new path %x is below the active maximum " | |
1171 | "%u\n", fcx_max_data, lpm, | |
1172 | private->fcx_max_data); | |
1173 | return -EACCES; | |
1174 | } | |
1175 | } | |
1176 | return 0; | |
1177 | } | |
1178 | ||
b206181d SH |
1179 | static int rebuild_device_uid(struct dasd_device *device, |
1180 | struct path_verification_work_data *data) | |
1181 | { | |
1182 | struct dasd_eckd_private *private; | |
1183 | struct dasd_path *path_data; | |
1184 | __u8 lpm, opm; | |
1185 | int rc; | |
1186 | ||
1187 | rc = -ENODEV; | |
1188 | private = (struct dasd_eckd_private *) device->private; | |
1189 | path_data = &device->path_data; | |
1190 | opm = device->path_data.opm; | |
1191 | ||
1192 | for (lpm = 0x80; lpm; lpm >>= 1) { | |
1193 | if (!(lpm & opm)) | |
1194 | continue; | |
1195 | memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); | |
1196 | memset(&data->cqr, 0, sizeof(data->cqr)); | |
1197 | data->cqr.cpaddr = &data->ccw; | |
1198 | rc = dasd_eckd_read_conf_immediately(device, &data->cqr, | |
1199 | data->rcd_buffer, | |
1200 | lpm); | |
1201 | ||
1202 | if (rc) { | |
1203 | if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */ | |
1204 | continue; | |
1205 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, | |
1206 | "Read configuration data " | |
1207 | "returned error %d", rc); | |
1208 | break; | |
1209 | } | |
1210 | memcpy(private->conf_data, data->rcd_buffer, | |
1211 | DASD_ECKD_RCD_DATA_SIZE); | |
1212 | if (dasd_eckd_identify_conf_parts(private)) { | |
1213 | rc = -ENODEV; | |
1214 | } else /* first valid path is enough */ | |
1215 | break; | |
1216 | } | |
1217 | ||
1218 | if (!rc) | |
1219 | rc = dasd_eckd_generate_uid(device); | |
1220 | ||
1221 | return rc; | |
1222 | } | |
1223 | ||
a4d26c6a SW |
1224 | static void do_path_verification_work(struct work_struct *work) |
1225 | { | |
1226 | struct path_verification_work_data *data; | |
1227 | struct dasd_device *device; | |
b206181d SH |
1228 | struct dasd_eckd_private path_private; |
1229 | struct dasd_uid *uid; | |
1230 | __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; | |
a4d26c6a SW |
1231 | __u8 lpm, opm, npm, ppm, epm; |
1232 | unsigned long flags; | |
b206181d | 1233 | char print_uid[60]; |
a4d26c6a SW |
1234 | int rc; |
1235 | ||
1236 | data = container_of(work, struct path_verification_work_data, worker); | |
1237 | device = data->device; | |
1238 | ||
c8d1c0ff SH |
1239 | /* delay path verification until device was resumed */ |
1240 | if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { | |
1241 | schedule_work(work); | |
1242 | return; | |
1243 | } | |
1244 | ||
a4d26c6a SW |
1245 | opm = 0; |
1246 | npm = 0; | |
1247 | ppm = 0; | |
1248 | epm = 0; | |
1249 | for (lpm = 0x80; lpm; lpm >>= 1) { | |
b206181d SH |
1250 | if (!(lpm & data->tbvpm)) |
1251 | continue; | |
1252 | memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); | |
1253 | memset(&data->cqr, 0, sizeof(data->cqr)); | |
1254 | data->cqr.cpaddr = &data->ccw; | |
1255 | rc = dasd_eckd_read_conf_immediately(device, &data->cqr, | |
1256 | data->rcd_buffer, | |
1257 | lpm); | |
1258 | if (!rc) { | |
1259 | switch (dasd_eckd_path_access(data->rcd_buffer, | |
1260 | DASD_ECKD_RCD_DATA_SIZE) | |
1261 | ) { | |
1262 | case 0x02: | |
1263 | npm |= lpm; | |
1264 | break; | |
1265 | case 0x03: | |
1266 | ppm |= lpm; | |
1267 | break; | |
1268 | } | |
1269 | opm |= lpm; | |
1270 | } else if (rc == -EOPNOTSUPP) { | |
1271 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
1272 | "path verification: No configuration " | |
1273 | "data retrieved"); | |
1274 | opm |= lpm; | |
1275 | } else if (rc == -EAGAIN) { | |
1276 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
a4d26c6a SW |
1277 | "path verification: device is stopped," |
1278 | " try again later"); | |
b206181d SH |
1279 | epm |= lpm; |
1280 | } else { | |
1281 | dev_warn(&device->cdev->dev, | |
1282 | "Reading device feature codes failed " | |
1283 | "(rc=%d) for new path %x\n", rc, lpm); | |
1284 | continue; | |
1285 | } | |
1286 | if (verify_fcx_max_data(device, lpm)) { | |
1287 | opm &= ~lpm; | |
1288 | npm &= ~lpm; | |
1289 | ppm &= ~lpm; | |
1290 | continue; | |
1291 | } | |
1292 | ||
1293 | /* | |
1294 | * save conf_data for comparison after | |
1295 | * rebuild_device_uid may have changed | |
1296 | * the original data | |
1297 | */ | |
1298 | memcpy(&path_rcd_buf, data->rcd_buffer, | |
1299 | DASD_ECKD_RCD_DATA_SIZE); | |
1300 | path_private.conf_data = (void *) &path_rcd_buf; | |
1301 | path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; | |
1302 | if (dasd_eckd_identify_conf_parts(&path_private)) { | |
1303 | path_private.conf_data = NULL; | |
1304 | path_private.conf_len = 0; | |
1305 | continue; | |
1306 | } | |
1307 | ||
1308 | /* | |
1309 | * compare path UID with device UID only if at least | |
1310 | * one valid path is left | |
1311 | * in other case the device UID may have changed and | |
1312 | * the first working path UID will be used as device UID | |
1313 | */ | |
1314 | if (device->path_data.opm && | |
1315 | dasd_eckd_compare_path_uid(device, &path_private)) { | |
1316 | /* | |
1317 | * the comparison was not successful | |
1318 | * rebuild the device UID with at least one | |
1319 | * known path in case a z/VM hyperswap command | |
1320 | * has changed the device | |
1321 | * | |
1322 | * after this compare again | |
1323 | * | |
1324 | * if either the rebuild or the recompare fails | |
1325 | * the path can not be used | |
1326 | */ | |
1327 | if (rebuild_device_uid(device, data) || | |
1328 | dasd_eckd_compare_path_uid( | |
1329 | device, &path_private)) { | |
1330 | uid = &path_private.uid; | |
1331 | if (strlen(uid->vduit) > 0) | |
1332 | snprintf(print_uid, sizeof(print_uid), | |
1333 | "%s.%s.%04x.%02x.%s", | |
1334 | uid->vendor, uid->serial, | |
1335 | uid->ssid, uid->real_unit_addr, | |
1336 | uid->vduit); | |
1337 | else | |
1338 | snprintf(print_uid, sizeof(print_uid), | |
1339 | "%s.%s.%04x.%02x", | |
1340 | uid->vendor, uid->serial, | |
1341 | uid->ssid, | |
1342 | uid->real_unit_addr); | |
1343 | dev_err(&device->cdev->dev, | |
1344 | "The newly added channel path %02X " | |
1345 | "will not be used because it leads " | |
1346 | "to a different device %s\n", | |
1347 | lpm, print_uid); | |
a4d26c6a SW |
1348 | opm &= ~lpm; |
1349 | npm &= ~lpm; | |
1350 | ppm &= ~lpm; | |
b206181d | 1351 | continue; |
a4d26c6a SW |
1352 | } |
1353 | } | |
b206181d SH |
1354 | |
1355 | /* | |
1356 | * There is a small chance that a path is lost again between | |
1357 | * above path verification and the following modification of | |
1358 | * the device opm mask. We could avoid that race here by using | |
1359 | * yet another path mask, but we rather deal with this unlikely | |
1360 | * situation in dasd_start_IO. | |
1361 | */ | |
1362 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); | |
1363 | if (!device->path_data.opm && opm) { | |
1364 | device->path_data.opm = opm; | |
1365 | dasd_generic_path_operational(device); | |
1366 | } else | |
1367 | device->path_data.opm |= opm; | |
1368 | device->path_data.npm |= npm; | |
1369 | device->path_data.ppm |= ppm; | |
1370 | device->path_data.tbvpm |= epm; | |
1371 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); | |
a4d26c6a | 1372 | } |
a4d26c6a SW |
1373 | |
1374 | dasd_put_device(device); | |
1375 | if (data->isglobal) | |
1376 | mutex_unlock(&dasd_path_verification_mutex); | |
1377 | else | |
1378 | kfree(data); | |
1379 | } | |
1380 | ||
1381 | static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm) | |
1382 | { | |
1383 | struct path_verification_work_data *data; | |
1384 | ||
1385 | data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); | |
1386 | if (!data) { | |
1387 | if (mutex_trylock(&dasd_path_verification_mutex)) { | |
1388 | data = path_verification_worker; | |
1389 | data->isglobal = 1; | |
1390 | } else | |
1391 | return -ENOMEM; | |
1392 | } else { | |
1393 | memset(data, 0, sizeof(*data)); | |
1394 | data->isglobal = 0; | |
1395 | } | |
1396 | INIT_WORK(&data->worker, do_path_verification_work); | |
1397 | dasd_get_device(device); | |
1398 | data->device = device; | |
1399 | data->tbvpm = lpm; | |
1400 | schedule_work(&data->worker); | |
1401 | return 0; | |
1402 | } | |
1403 | ||
8e09f215 SW |
1404 | static int dasd_eckd_read_features(struct dasd_device *device) |
1405 | { | |
1406 | struct dasd_psf_prssd_data *prssdp; | |
1407 | struct dasd_rssd_features *features; | |
1408 | struct dasd_ccw_req *cqr; | |
1409 | struct ccw1 *ccw; | |
1410 | int rc; | |
1411 | struct dasd_eckd_private *private; | |
1412 | ||
1413 | private = (struct dasd_eckd_private *) device->private; | |
68d1e5f0 | 1414 | memset(&private->features, 0, sizeof(struct dasd_rssd_features)); |
68b781fe | 1415 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, |
8e09f215 SW |
1416 | (sizeof(struct dasd_psf_prssd_data) + |
1417 | sizeof(struct dasd_rssd_features)), | |
1418 | device); | |
1419 | if (IS_ERR(cqr)) { | |
b8ed5dd5 SH |
1420 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " |
1421 | "allocate initialization request"); | |
8e09f215 SW |
1422 | return PTR_ERR(cqr); |
1423 | } | |
1424 | cqr->startdev = device; | |
1425 | cqr->memdev = device; | |
1426 | cqr->block = NULL; | |
eb6e199b | 1427 | cqr->retries = 256; |
8e09f215 SW |
1428 | cqr->expires = 10 * HZ; |
1429 | ||
1430 | /* Prepare for Read Subsystem Data */ | |
1431 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
1432 | memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); | |
1433 | prssdp->order = PSF_ORDER_PRSSD; | |
1434 | prssdp->suborder = 0x41; /* Read Feature Codes */ | |
1435 | /* all other bytes of prssdp must be zero */ | |
1436 | ||
1437 | ccw = cqr->cpaddr; | |
1438 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
1439 | ccw->count = sizeof(struct dasd_psf_prssd_data); | |
1440 | ccw->flags |= CCW_FLAG_CC; | |
1441 | ccw->cda = (__u32)(addr_t) prssdp; | |
1442 | ||
1443 | /* Read Subsystem Data - feature codes */ | |
1444 | features = (struct dasd_rssd_features *) (prssdp + 1); | |
1445 | memset(features, 0, sizeof(struct dasd_rssd_features)); | |
1446 | ||
1447 | ccw++; | |
1448 | ccw->cmd_code = DASD_ECKD_CCW_RSSD; | |
1449 | ccw->count = sizeof(struct dasd_rssd_features); | |
1450 | ccw->cda = (__u32)(addr_t) features; | |
1451 | ||
1aae0560 | 1452 | cqr->buildclk = get_tod_clock(); |
8e09f215 SW |
1453 | cqr->status = DASD_CQR_FILLED; |
1454 | rc = dasd_sleep_on(cqr); | |
1455 | if (rc == 0) { | |
1456 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
1457 | features = (struct dasd_rssd_features *) (prssdp + 1); | |
1458 | memcpy(&private->features, features, | |
1459 | sizeof(struct dasd_rssd_features)); | |
68d1e5f0 SW |
1460 | } else |
1461 | dev_warn(&device->cdev->dev, "Reading device feature codes" | |
1462 | " failed with rc=%d\n", rc); | |
8e09f215 SW |
1463 | dasd_sfree_request(cqr, cqr->memdev); |
1464 | return rc; | |
1465 | } | |
1466 | ||
1467 | ||
40545573 HH |
1468 | /* |
1469 | * Build CP for Perform Subsystem Function - SSC. | |
1470 | */ | |
f3eb5384 SW |
1471 | static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, |
1472 | int enable_pav) | |
40545573 | 1473 | { |
8e09f215 SW |
1474 | struct dasd_ccw_req *cqr; |
1475 | struct dasd_psf_ssc_data *psf_ssc_data; | |
1476 | struct ccw1 *ccw; | |
40545573 | 1477 | |
68b781fe | 1478 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , |
40545573 HH |
1479 | sizeof(struct dasd_psf_ssc_data), |
1480 | device); | |
1481 | ||
8e09f215 | 1482 | if (IS_ERR(cqr)) { |
fc19f381 | 1483 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
40545573 | 1484 | "Could not allocate PSF-SSC request"); |
8e09f215 SW |
1485 | return cqr; |
1486 | } | |
1487 | psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; | |
1488 | psf_ssc_data->order = PSF_ORDER_SSC; | |
626350b6 | 1489 | psf_ssc_data->suborder = 0xc0; |
f3eb5384 | 1490 | if (enable_pav) { |
626350b6 | 1491 | psf_ssc_data->suborder |= 0x08; |
f3eb5384 SW |
1492 | psf_ssc_data->reserved[0] = 0x88; |
1493 | } | |
8e09f215 SW |
1494 | ccw = cqr->cpaddr; |
1495 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
1496 | ccw->cda = (__u32)(addr_t)psf_ssc_data; | |
1497 | ccw->count = 66; | |
1498 | ||
1499 | cqr->startdev = device; | |
1500 | cqr->memdev = device; | |
1501 | cqr->block = NULL; | |
eb6e199b | 1502 | cqr->retries = 256; |
8e09f215 | 1503 | cqr->expires = 10*HZ; |
1aae0560 | 1504 | cqr->buildclk = get_tod_clock(); |
8e09f215 SW |
1505 | cqr->status = DASD_CQR_FILLED; |
1506 | return cqr; | |
40545573 HH |
1507 | } |
1508 | ||
1509 | /* | |
1510 | * Perform Subsystem Function. | |
1511 | * It is necessary to trigger CIO for channel revalidation since this | |
1512 | * call might change behaviour of DASD devices. | |
1513 | */ | |
1514 | static int | |
12d7b107 SH |
1515 | dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav, |
1516 | unsigned long flags) | |
40545573 | 1517 | { |
8e09f215 SW |
1518 | struct dasd_ccw_req *cqr; |
1519 | int rc; | |
1520 | ||
f3eb5384 | 1521 | cqr = dasd_eckd_build_psf_ssc(device, enable_pav); |
8e09f215 SW |
1522 | if (IS_ERR(cqr)) |
1523 | return PTR_ERR(cqr); | |
1524 | ||
12d7b107 SH |
1525 | /* |
1526 | * set flags e.g. turn on failfast, to prevent blocking | |
1527 | * the calling function should handle failed requests | |
1528 | */ | |
1529 | cqr->flags |= flags; | |
1530 | ||
8e09f215 SW |
1531 | rc = dasd_sleep_on(cqr); |
1532 | if (!rc) | |
1533 | /* trigger CIO to reprobe devices */ | |
1534 | css_schedule_reprobe(); | |
12d7b107 SH |
1535 | else if (cqr->intrc == -EAGAIN) |
1536 | rc = -EAGAIN; | |
1537 | ||
8e09f215 SW |
1538 | dasd_sfree_request(cqr, cqr->memdev); |
1539 | return rc; | |
40545573 HH |
1540 | } |
1541 | ||
1542 | /* | |
1543 | * Valide storage server of current device. | |
1544 | */ | |
12d7b107 SH |
1545 | static int dasd_eckd_validate_server(struct dasd_device *device, |
1546 | unsigned long flags) | |
40545573 HH |
1547 | { |
1548 | int rc; | |
8e09f215 | 1549 | struct dasd_eckd_private *private; |
f3eb5384 | 1550 | int enable_pav; |
40545573 | 1551 | |
f9f8d02f SH |
1552 | private = (struct dasd_eckd_private *) device->private; |
1553 | if (private->uid.type == UA_BASE_PAV_ALIAS || | |
1554 | private->uid.type == UA_HYPER_PAV_ALIAS) | |
12d7b107 | 1555 | return 0; |
40545573 | 1556 | if (dasd_nopav || MACHINE_IS_VM) |
f3eb5384 SW |
1557 | enable_pav = 0; |
1558 | else | |
1559 | enable_pav = 1; | |
12d7b107 | 1560 | rc = dasd_eckd_psf_ssc(device, enable_pav, flags); |
eb6e199b | 1561 | |
8e79a441 HH |
1562 | /* may be requested feature is not available on server, |
1563 | * therefore just report error and go ahead */ | |
b8ed5dd5 SH |
1564 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " |
1565 | "returned rc=%d", private->uid.ssid, rc); | |
12d7b107 | 1566 | return rc; |
40545573 HH |
1567 | } |
1568 | ||
f1633031 SH |
1569 | /* |
1570 | * worker to do a validate server in case of a lost pathgroup | |
1571 | */ | |
1572 | static void dasd_eckd_do_validate_server(struct work_struct *work) | |
1573 | { | |
1574 | struct dasd_device *device = container_of(work, struct dasd_device, | |
1575 | kick_validate); | |
ea4da6ea SH |
1576 | unsigned long flags = 0; |
1577 | ||
1578 | set_bit(DASD_CQR_FLAGS_FAILFAST, &flags); | |
1579 | if (dasd_eckd_validate_server(device, flags) | |
12d7b107 SH |
1580 | == -EAGAIN) { |
1581 | /* schedule worker again if failed */ | |
1582 | schedule_work(&device->kick_validate); | |
1583 | return; | |
1584 | } | |
1585 | ||
f1633031 SH |
1586 | dasd_put_device(device); |
1587 | } | |
1588 | ||
1589 | static void dasd_eckd_kick_validate_server(struct dasd_device *device) | |
1590 | { | |
1591 | dasd_get_device(device); | |
25e2cf1c SH |
1592 | /* exit if device not online or in offline processing */ |
1593 | if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || | |
1594 | device->state < DASD_STATE_ONLINE) { | |
1595 | dasd_put_device(device); | |
1596 | return; | |
1597 | } | |
f1633031 SH |
1598 | /* queue call to do_validate_server to the kernel event daemon. */ |
1599 | schedule_work(&device->kick_validate); | |
1600 | } | |
1601 | ||
ef19298b SW |
1602 | static u32 get_fcx_max_data(struct dasd_device *device) |
1603 | { | |
1604 | #if defined(CONFIG_64BIT) | |
1605 | int tpm, mdc; | |
1606 | int fcx_in_css, fcx_in_gneq, fcx_in_features; | |
1607 | struct dasd_eckd_private *private; | |
1608 | ||
1609 | if (dasd_nofcx) | |
1610 | return 0; | |
1611 | /* is transport mode supported? */ | |
1612 | private = (struct dasd_eckd_private *) device->private; | |
1613 | fcx_in_css = css_general_characteristics.fcx; | |
1614 | fcx_in_gneq = private->gneq->reserved2[7] & 0x04; | |
1615 | fcx_in_features = private->features.feature[40] & 0x80; | |
1616 | tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; | |
1617 | ||
1618 | if (!tpm) | |
1619 | return 0; | |
1620 | ||
1621 | mdc = ccw_device_get_mdc(device->cdev, 0); | |
1622 | if (mdc < 0) { | |
1623 | dev_warn(&device->cdev->dev, "Detecting the maximum supported" | |
1624 | " data size for zHPF requests failed\n"); | |
1625 | return 0; | |
1626 | } else | |
1627 | return mdc * FCX_MAX_DATA_FACTOR; | |
1628 | #else | |
1629 | return 0; | |
1630 | #endif | |
1631 | } | |
1632 | ||
3d052595 HH |
1633 | /* |
1634 | * Check device characteristics. | |
1635 | * If the device is accessible using ECKD discipline, the device is enabled. | |
1636 | */ | |
1da177e4 LT |
1637 | static int |
1638 | dasd_eckd_check_characteristics(struct dasd_device *device) | |
1639 | { | |
1640 | struct dasd_eckd_private *private; | |
8e09f215 | 1641 | struct dasd_block *block; |
2dedf0d9 | 1642 | struct dasd_uid temp_uid; |
f9f8d02f | 1643 | int rc, i; |
33b62a30 | 1644 | int readonly; |
7c8faa86 | 1645 | unsigned long value; |
1da177e4 | 1646 | |
f1633031 SH |
1647 | /* setup work queue for validate server*/ |
1648 | INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); | |
1649 | ||
454e1fa1 PO |
1650 | if (!ccw_device_is_pathgroup(device->cdev)) { |
1651 | dev_warn(&device->cdev->dev, | |
1652 | "A channel path group could not be established\n"); | |
1653 | return -EIO; | |
1654 | } | |
1655 | if (!ccw_device_is_multipath(device->cdev)) { | |
1656 | dev_info(&device->cdev->dev, | |
1657 | "The DASD is not operating in multipath mode\n"); | |
1658 | } | |
1da177e4 | 1659 | private = (struct dasd_eckd_private *) device->private; |
92636b15 SO |
1660 | if (!private) { |
1661 | private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); | |
1662 | if (!private) { | |
fc19f381 SH |
1663 | dev_warn(&device->cdev->dev, |
1664 | "Allocating memory for private DASD data " | |
1665 | "failed\n"); | |
1da177e4 LT |
1666 | return -ENOMEM; |
1667 | } | |
1da177e4 | 1668 | device->private = (void *) private; |
92636b15 SO |
1669 | } else { |
1670 | memset(private, 0, sizeof(*private)); | |
1da177e4 LT |
1671 | } |
1672 | /* Invalidate status of initial analysis. */ | |
1673 | private->init_cqr_status = -1; | |
1674 | /* Set default cache operations. */ | |
1675 | private->attrib.operation = DASD_NORMAL_CACHE; | |
1676 | private->attrib.nr_cyl = 0; | |
1677 | ||
40545573 HH |
1678 | /* Read Configuration Data */ |
1679 | rc = dasd_eckd_read_conf(device); | |
1680 | if (rc) | |
8e09f215 | 1681 | goto out_err1; |
40545573 | 1682 | |
7c8faa86 SH |
1683 | /* set default timeout */ |
1684 | device->default_expires = DASD_EXPIRES; | |
1f1ee9ad HR |
1685 | /* set default retry count */ |
1686 | device->default_retries = DASD_RETRIES; | |
1687 | ||
7c8faa86 SH |
1688 | if (private->gneq) { |
1689 | value = 1; | |
1690 | for (i = 0; i < private->gneq->timeout.value; i++) | |
1691 | value = 10 * value; | |
1692 | value = value * private->gneq->timeout.number; | |
1693 | /* do not accept useless values */ | |
1694 | if (value != 0 && value <= DASD_EXPIRES_MAX) | |
1695 | device->default_expires = value; | |
1696 | } | |
1697 | ||
2dedf0d9 SH |
1698 | dasd_eckd_get_uid(device, &temp_uid); |
1699 | if (temp_uid.type == UA_BASE_DEVICE) { | |
8e09f215 SW |
1700 | block = dasd_alloc_block(); |
1701 | if (IS_ERR(block)) { | |
b8ed5dd5 SH |
1702 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", |
1703 | "could not allocate dasd " | |
1704 | "block structure"); | |
8e09f215 SW |
1705 | rc = PTR_ERR(block); |
1706 | goto out_err1; | |
1707 | } | |
1708 | device->block = block; | |
1709 | block->base = device; | |
1710 | } | |
1711 | ||
f9f8d02f SH |
1712 | /* register lcu with alias handling, enable PAV */ |
1713 | rc = dasd_alias_make_device_known_to_lcu(device); | |
1714 | if (rc) | |
8e09f215 | 1715 | goto out_err2; |
f9f8d02f | 1716 | |
12d7b107 | 1717 | dasd_eckd_validate_server(device, 0); |
f4ac1d02 SW |
1718 | |
1719 | /* device may report different configuration data after LCU setup */ | |
1720 | rc = dasd_eckd_read_conf(device); | |
1721 | if (rc) | |
1722 | goto out_err3; | |
8e09f215 SW |
1723 | |
1724 | /* Read Feature Codes */ | |
68d1e5f0 | 1725 | dasd_eckd_read_features(device); |
40545573 | 1726 | |
1da177e4 | 1727 | /* Read Device Characteristics */ |
68b781fe SH |
1728 | rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, |
1729 | &private->rdc_data, 64); | |
8e09f215 | 1730 | if (rc) { |
b8ed5dd5 SH |
1731 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, |
1732 | "Read device characteristic failed, rc=%d", rc); | |
8e09f215 SW |
1733 | goto out_err3; |
1734 | } | |
34cd551a SH |
1735 | |
1736 | if ((device->features & DASD_FEATURE_USERAW) && | |
1737 | !(private->rdc_data.facilities.RT_in_LR)) { | |
1738 | dev_err(&device->cdev->dev, "The storage server does not " | |
1739 | "support raw-track access\n"); | |
1740 | rc = -EINVAL; | |
1741 | goto out_err3; | |
1742 | } | |
1743 | ||
817f2c84 | 1744 | /* find the valid cylinder size */ |
b44b0ab3 SW |
1745 | if (private->rdc_data.no_cyl == LV_COMPAT_CYL && |
1746 | private->rdc_data.long_no_cyl) | |
1747 | private->real_cyl = private->rdc_data.long_no_cyl; | |
1748 | else | |
1749 | private->real_cyl = private->rdc_data.no_cyl; | |
1750 | ||
ef19298b SW |
1751 | private->fcx_max_data = get_fcx_max_data(device); |
1752 | ||
33b62a30 SW |
1753 | readonly = dasd_device_is_ro(device); |
1754 | if (readonly) | |
1755 | set_bit(DASD_FLAG_DEVICE_RO, &device->flags); | |
1756 | ||
fc19f381 | 1757 | dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " |
33b62a30 | 1758 | "with %d cylinders, %d heads, %d sectors%s\n", |
fc19f381 SH |
1759 | private->rdc_data.dev_type, |
1760 | private->rdc_data.dev_model, | |
1761 | private->rdc_data.cu_type, | |
1762 | private->rdc_data.cu_model.model, | |
92636b15 | 1763 | private->real_cyl, |
fc19f381 | 1764 | private->rdc_data.trk_per_cyl, |
33b62a30 SW |
1765 | private->rdc_data.sec_per_trk, |
1766 | readonly ? ", read-only device" : ""); | |
8e09f215 SW |
1767 | return 0; |
1768 | ||
1769 | out_err3: | |
1770 | dasd_alias_disconnect_device_from_lcu(device); | |
1771 | out_err2: | |
1772 | dasd_free_block(device->block); | |
1773 | device->block = NULL; | |
1774 | out_err1: | |
4abb08c2 | 1775 | kfree(private->conf_data); |
8e09f215 SW |
1776 | kfree(device->private); |
1777 | device->private = NULL; | |
3d052595 | 1778 | return rc; |
1da177e4 LT |
1779 | } |
1780 | ||
8e09f215 SW |
1781 | static void dasd_eckd_uncheck_device(struct dasd_device *device) |
1782 | { | |
4abb08c2 SW |
1783 | struct dasd_eckd_private *private; |
1784 | ||
1785 | private = (struct dasd_eckd_private *) device->private; | |
8e09f215 | 1786 | dasd_alias_disconnect_device_from_lcu(device); |
4abb08c2 SW |
1787 | private->ned = NULL; |
1788 | private->sneq = NULL; | |
1789 | private->vdsneq = NULL; | |
1790 | private->gneq = NULL; | |
1791 | private->conf_len = 0; | |
1792 | kfree(private->conf_data); | |
1793 | private->conf_data = NULL; | |
8e09f215 SW |
1794 | } |
1795 | ||
1da177e4 LT |
1796 | static struct dasd_ccw_req * |
1797 | dasd_eckd_analysis_ccw(struct dasd_device *device) | |
1798 | { | |
1799 | struct dasd_eckd_private *private; | |
1800 | struct eckd_count *count_data; | |
1801 | struct LO_eckd_data *LO_data; | |
1802 | struct dasd_ccw_req *cqr; | |
1803 | struct ccw1 *ccw; | |
1804 | int cplength, datasize; | |
1805 | int i; | |
1806 | ||
1807 | private = (struct dasd_eckd_private *) device->private; | |
1808 | ||
1809 | cplength = 8; | |
1810 | datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); | |
68b781fe | 1811 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); |
1da177e4 LT |
1812 | if (IS_ERR(cqr)) |
1813 | return cqr; | |
1814 | ccw = cqr->cpaddr; | |
1815 | /* Define extent for the first 3 tracks. */ | |
1816 | define_extent(ccw++, cqr->data, 0, 2, | |
1817 | DASD_ECKD_CCW_READ_COUNT, device); | |
8e09f215 | 1818 | LO_data = cqr->data + sizeof(struct DE_eckd_data); |
1da177e4 LT |
1819 | /* Locate record for the first 4 records on track 0. */ |
1820 | ccw[-1].flags |= CCW_FLAG_CC; | |
1821 | locate_record(ccw++, LO_data++, 0, 0, 4, | |
1822 | DASD_ECKD_CCW_READ_COUNT, device, 0); | |
1823 | ||
1824 | count_data = private->count_area; | |
1825 | for (i = 0; i < 4; i++) { | |
1826 | ccw[-1].flags |= CCW_FLAG_CC; | |
1827 | ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; | |
1828 | ccw->flags = 0; | |
1829 | ccw->count = 8; | |
1830 | ccw->cda = (__u32)(addr_t) count_data; | |
1831 | ccw++; | |
1832 | count_data++; | |
1833 | } | |
1834 | ||
1835 | /* Locate record for the first record on track 2. */ | |
1836 | ccw[-1].flags |= CCW_FLAG_CC; | |
1837 | locate_record(ccw++, LO_data++, 2, 0, 1, | |
1838 | DASD_ECKD_CCW_READ_COUNT, device, 0); | |
1839 | /* Read count ccw. */ | |
1840 | ccw[-1].flags |= CCW_FLAG_CC; | |
1841 | ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; | |
1842 | ccw->flags = 0; | |
1843 | ccw->count = 8; | |
1844 | ccw->cda = (__u32)(addr_t) count_data; | |
1845 | ||
8e09f215 SW |
1846 | cqr->block = NULL; |
1847 | cqr->startdev = device; | |
1848 | cqr->memdev = device; | |
eb6e199b | 1849 | cqr->retries = 255; |
1aae0560 | 1850 | cqr->buildclk = get_tod_clock(); |
1da177e4 LT |
1851 | cqr->status = DASD_CQR_FILLED; |
1852 | return cqr; | |
1853 | } | |
1854 | ||
eb6e199b SW |
1855 | /* differentiate between 'no record found' and any other error */ |
1856 | static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) | |
1857 | { | |
1858 | char *sense; | |
1859 | if (init_cqr->status == DASD_CQR_DONE) | |
1860 | return INIT_CQR_OK; | |
1861 | else if (init_cqr->status == DASD_CQR_NEED_ERP || | |
1862 | init_cqr->status == DASD_CQR_FAILED) { | |
1863 | sense = dasd_get_sense(&init_cqr->irb); | |
1864 | if (sense && (sense[1] & SNS1_NO_REC_FOUND)) | |
1865 | return INIT_CQR_UNFORMATTED; | |
1866 | else | |
1867 | return INIT_CQR_ERROR; | |
1868 | } else | |
1869 | return INIT_CQR_ERROR; | |
1870 | } | |
1871 | ||
1da177e4 LT |
1872 | /* |
1873 | * This is the callback function for the init_analysis cqr. It saves | |
1874 | * the status of the initial analysis ccw before it frees it and kicks | |
1875 | * the device to continue the startup sequence. This will call | |
1876 | * dasd_eckd_do_analysis again (if the devices has not been marked | |
1877 | * for deletion in the meantime). | |
1878 | */ | |
eb6e199b SW |
1879 | static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, |
1880 | void *data) | |
1da177e4 LT |
1881 | { |
1882 | struct dasd_eckd_private *private; | |
1883 | struct dasd_device *device; | |
1884 | ||
8e09f215 | 1885 | device = init_cqr->startdev; |
1da177e4 | 1886 | private = (struct dasd_eckd_private *) device->private; |
eb6e199b | 1887 | private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); |
1da177e4 LT |
1888 | dasd_sfree_request(init_cqr, device); |
1889 | dasd_kick_device(device); | |
1890 | } | |
1891 | ||
eb6e199b | 1892 | static int dasd_eckd_start_analysis(struct dasd_block *block) |
1da177e4 | 1893 | { |
1da177e4 LT |
1894 | struct dasd_ccw_req *init_cqr; |
1895 | ||
8e09f215 | 1896 | init_cqr = dasd_eckd_analysis_ccw(block->base); |
1da177e4 LT |
1897 | if (IS_ERR(init_cqr)) |
1898 | return PTR_ERR(init_cqr); | |
1899 | init_cqr->callback = dasd_eckd_analysis_callback; | |
1900 | init_cqr->callback_data = NULL; | |
1901 | init_cqr->expires = 5*HZ; | |
eb6e199b SW |
1902 | /* first try without ERP, so we can later handle unformatted |
1903 | * devices as special case | |
1904 | */ | |
1905 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); | |
1906 | init_cqr->retries = 0; | |
1da177e4 LT |
1907 | dasd_add_request_head(init_cqr); |
1908 | return -EAGAIN; | |
1909 | } | |
1910 | ||
eb6e199b | 1911 | static int dasd_eckd_end_analysis(struct dasd_block *block) |
1da177e4 | 1912 | { |
8e09f215 | 1913 | struct dasd_device *device; |
1da177e4 LT |
1914 | struct dasd_eckd_private *private; |
1915 | struct eckd_count *count_area; | |
1916 | unsigned int sb, blk_per_trk; | |
1917 | int status, i; | |
eb6e199b | 1918 | struct dasd_ccw_req *init_cqr; |
1da177e4 | 1919 | |
8e09f215 | 1920 | device = block->base; |
1da177e4 LT |
1921 | private = (struct dasd_eckd_private *) device->private; |
1922 | status = private->init_cqr_status; | |
1923 | private->init_cqr_status = -1; | |
eb6e199b SW |
1924 | if (status == INIT_CQR_ERROR) { |
1925 | /* try again, this time with full ERP */ | |
1926 | init_cqr = dasd_eckd_analysis_ccw(device); | |
1927 | dasd_sleep_on(init_cqr); | |
1928 | status = dasd_eckd_analysis_evaluation(init_cqr); | |
1929 | dasd_sfree_request(init_cqr, device); | |
1930 | } | |
1931 | ||
e4dbb0f2 SH |
1932 | if (device->features & DASD_FEATURE_USERAW) { |
1933 | block->bp_block = DASD_RAW_BLOCKSIZE; | |
1934 | blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; | |
1935 | block->s2b_shift = 3; | |
1936 | goto raw; | |
1937 | } | |
1938 | ||
eb6e199b SW |
1939 | if (status == INIT_CQR_UNFORMATTED) { |
1940 | dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); | |
1da177e4 | 1941 | return -EMEDIUMTYPE; |
eb6e199b SW |
1942 | } else if (status == INIT_CQR_ERROR) { |
1943 | dev_err(&device->cdev->dev, | |
1944 | "Detecting the DASD disk layout failed because " | |
1945 | "of an I/O error\n"); | |
1946 | return -EIO; | |
1da177e4 LT |
1947 | } |
1948 | ||
1949 | private->uses_cdl = 1; | |
1da177e4 LT |
1950 | /* Check Track 0 for Compatible Disk Layout */ |
1951 | count_area = NULL; | |
1952 | for (i = 0; i < 3; i++) { | |
1953 | if (private->count_area[i].kl != 4 || | |
3bc9fef9 SH |
1954 | private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 || |
1955 | private->count_area[i].cyl != 0 || | |
1956 | private->count_area[i].head != count_area_head[i] || | |
1957 | private->count_area[i].record != count_area_rec[i]) { | |
1da177e4 LT |
1958 | private->uses_cdl = 0; |
1959 | break; | |
1960 | } | |
1961 | } | |
1962 | if (i == 3) | |
1963 | count_area = &private->count_area[4]; | |
1964 | ||
1965 | if (private->uses_cdl == 0) { | |
1966 | for (i = 0; i < 5; i++) { | |
1967 | if ((private->count_area[i].kl != 0) || | |
1968 | (private->count_area[i].dl != | |
3bc9fef9 SH |
1969 | private->count_area[0].dl) || |
1970 | private->count_area[i].cyl != 0 || | |
1971 | private->count_area[i].head != count_area_head[i] || | |
1972 | private->count_area[i].record != count_area_rec[i]) | |
1da177e4 LT |
1973 | break; |
1974 | } | |
1975 | if (i == 5) | |
1976 | count_area = &private->count_area[0]; | |
1977 | } else { | |
1978 | if (private->count_area[3].record == 1) | |
fc19f381 SH |
1979 | dev_warn(&device->cdev->dev, |
1980 | "Track 0 has no records following the VTOC\n"); | |
1da177e4 | 1981 | } |
e4dbb0f2 | 1982 | |
1da177e4 LT |
1983 | if (count_area != NULL && count_area->kl == 0) { |
1984 | /* we found notthing violating our disk layout */ | |
1985 | if (dasd_check_blocksize(count_area->dl) == 0) | |
8e09f215 | 1986 | block->bp_block = count_area->dl; |
1da177e4 | 1987 | } |
8e09f215 | 1988 | if (block->bp_block == 0) { |
fc19f381 SH |
1989 | dev_warn(&device->cdev->dev, |
1990 | "The disk layout of the DASD is not supported\n"); | |
1da177e4 LT |
1991 | return -EMEDIUMTYPE; |
1992 | } | |
8e09f215 SW |
1993 | block->s2b_shift = 0; /* bits to shift 512 to get a block */ |
1994 | for (sb = 512; sb < block->bp_block; sb = sb << 1) | |
1995 | block->s2b_shift++; | |
1da177e4 | 1996 | |
8e09f215 | 1997 | blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); |
e4dbb0f2 SH |
1998 | |
1999 | raw: | |
b44b0ab3 | 2000 | block->blocks = (private->real_cyl * |
1da177e4 LT |
2001 | private->rdc_data.trk_per_cyl * |
2002 | blk_per_trk); | |
2003 | ||
fc19f381 SH |
2004 | dev_info(&device->cdev->dev, |
2005 | "DASD with %d KB/block, %d KB total size, %d KB/track, " | |
2006 | "%s\n", (block->bp_block >> 10), | |
2007 | ((private->real_cyl * | |
2008 | private->rdc_data.trk_per_cyl * | |
2009 | blk_per_trk * (block->bp_block >> 9)) >> 1), | |
2010 | ((blk_per_trk * block->bp_block) >> 10), | |
2011 | private->uses_cdl ? | |
2012 | "compatible disk layout" : "linux disk layout"); | |
1da177e4 LT |
2013 | |
2014 | return 0; | |
2015 | } | |
2016 | ||
8e09f215 | 2017 | static int dasd_eckd_do_analysis(struct dasd_block *block) |
1da177e4 LT |
2018 | { |
2019 | struct dasd_eckd_private *private; | |
2020 | ||
8e09f215 | 2021 | private = (struct dasd_eckd_private *) block->base->private; |
1da177e4 | 2022 | if (private->init_cqr_status < 0) |
8e09f215 | 2023 | return dasd_eckd_start_analysis(block); |
1da177e4 | 2024 | else |
8e09f215 | 2025 | return dasd_eckd_end_analysis(block); |
1da177e4 LT |
2026 | } |
2027 | ||
d42e1712 | 2028 | static int dasd_eckd_basic_to_ready(struct dasd_device *device) |
8e09f215 SW |
2029 | { |
2030 | return dasd_alias_add_device(device); | |
2031 | }; | |
2032 | ||
2033 | static int dasd_eckd_online_to_ready(struct dasd_device *device) | |
2034 | { | |
501183f2 | 2035 | cancel_work_sync(&device->reload_device); |
25e2cf1c | 2036 | cancel_work_sync(&device->kick_validate); |
d42e1712 SH |
2037 | return 0; |
2038 | }; | |
2039 | ||
2040 | static int dasd_eckd_ready_to_basic(struct dasd_device *device) | |
2041 | { | |
8e09f215 SW |
2042 | return dasd_alias_remove_device(device); |
2043 | }; | |
2044 | ||
1da177e4 | 2045 | static int |
8e09f215 | 2046 | dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) |
1da177e4 LT |
2047 | { |
2048 | struct dasd_eckd_private *private; | |
2049 | ||
8e09f215 SW |
2050 | private = (struct dasd_eckd_private *) block->base->private; |
2051 | if (dasd_check_blocksize(block->bp_block) == 0) { | |
1da177e4 | 2052 | geo->sectors = recs_per_track(&private->rdc_data, |
8e09f215 | 2053 | 0, block->bp_block); |
1da177e4 LT |
2054 | } |
2055 | geo->cylinders = private->rdc_data.no_cyl; | |
2056 | geo->heads = private->rdc_data.trk_per_cyl; | |
2057 | return 0; | |
2058 | } | |
2059 | ||
2060 | static struct dasd_ccw_req * | |
d42e1712 SH |
2061 | dasd_eckd_build_format(struct dasd_device *base, |
2062 | struct format_data_t *fdata) | |
1da177e4 | 2063 | { |
d42e1712 SH |
2064 | struct dasd_eckd_private *base_priv; |
2065 | struct dasd_eckd_private *start_priv; | |
2066 | struct dasd_device *startdev; | |
1da177e4 LT |
2067 | struct dasd_ccw_req *fcp; |
2068 | struct eckd_count *ect; | |
d42e1712 | 2069 | struct ch_t address; |
1da177e4 LT |
2070 | struct ccw1 *ccw; |
2071 | void *data; | |
b44b0ab3 | 2072 | int rpt; |
1da177e4 | 2073 | int cplength, datasize; |
d42e1712 | 2074 | int i, j; |
f9a28f7b JBJ |
2075 | int intensity = 0; |
2076 | int r0_perm; | |
d42e1712 | 2077 | int nr_tracks; |
1da177e4 | 2078 | |
d42e1712 SH |
2079 | startdev = dasd_alias_get_start_dev(base); |
2080 | if (!startdev) | |
2081 | startdev = base; | |
1da177e4 | 2082 | |
d42e1712 SH |
2083 | start_priv = (struct dasd_eckd_private *) startdev->private; |
2084 | base_priv = (struct dasd_eckd_private *) base->private; | |
2085 | ||
2086 | rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize); | |
2087 | ||
2088 | nr_tracks = fdata->stop_unit - fdata->start_unit + 1; | |
1da177e4 LT |
2089 | |
2090 | /* | |
2091 | * fdata->intensity is a bit string that tells us what to do: | |
2092 | * Bit 0: write record zero | |
2093 | * Bit 1: write home address, currently not supported | |
2094 | * Bit 2: invalidate tracks | |
2095 | * Bit 3: use OS/390 compatible disk layout (cdl) | |
f9a28f7b | 2096 | * Bit 4: do not allow storage subsystem to modify record zero |
1da177e4 LT |
2097 | * Only some bit combinations do make sense. |
2098 | */ | |
f9a28f7b JBJ |
2099 | if (fdata->intensity & 0x10) { |
2100 | r0_perm = 0; | |
2101 | intensity = fdata->intensity & ~0x10; | |
2102 | } else { | |
2103 | r0_perm = 1; | |
2104 | intensity = fdata->intensity; | |
2105 | } | |
d42e1712 | 2106 | |
f9a28f7b | 2107 | switch (intensity) { |
1da177e4 LT |
2108 | case 0x00: /* Normal format */ |
2109 | case 0x08: /* Normal format, use cdl. */ | |
d42e1712 SH |
2110 | cplength = 2 + (rpt*nr_tracks); |
2111 | datasize = sizeof(struct PFX_eckd_data) + | |
1da177e4 | 2112 | sizeof(struct LO_eckd_data) + |
d42e1712 | 2113 | rpt * nr_tracks * sizeof(struct eckd_count); |
1da177e4 LT |
2114 | break; |
2115 | case 0x01: /* Write record zero and format track. */ | |
2116 | case 0x09: /* Write record zero and format track, use cdl. */ | |
d42e1712 SH |
2117 | cplength = 2 + rpt * nr_tracks; |
2118 | datasize = sizeof(struct PFX_eckd_data) + | |
1da177e4 LT |
2119 | sizeof(struct LO_eckd_data) + |
2120 | sizeof(struct eckd_count) + | |
d42e1712 | 2121 | rpt * nr_tracks * sizeof(struct eckd_count); |
1da177e4 LT |
2122 | break; |
2123 | case 0x04: /* Invalidate track. */ | |
2124 | case 0x0c: /* Invalidate track, use cdl. */ | |
2125 | cplength = 3; | |
d42e1712 | 2126 | datasize = sizeof(struct PFX_eckd_data) + |
1da177e4 LT |
2127 | sizeof(struct LO_eckd_data) + |
2128 | sizeof(struct eckd_count); | |
2129 | break; | |
2130 | default: | |
d42e1712 SH |
2131 | dev_warn(&startdev->cdev->dev, |
2132 | "An I/O control call used incorrect flags 0x%x\n", | |
2133 | fdata->intensity); | |
1da177e4 LT |
2134 | return ERR_PTR(-EINVAL); |
2135 | } | |
2136 | /* Allocate the format ccw request. */ | |
d42e1712 SH |
2137 | fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, |
2138 | datasize, startdev); | |
1da177e4 LT |
2139 | if (IS_ERR(fcp)) |
2140 | return fcp; | |
2141 | ||
d42e1712 | 2142 | start_priv->count++; |
1da177e4 LT |
2143 | data = fcp->data; |
2144 | ccw = fcp->cpaddr; | |
2145 | ||
f9a28f7b | 2146 | switch (intensity & ~0x08) { |
1da177e4 | 2147 | case 0x00: /* Normal format. */ |
d42e1712 SH |
2148 | prefix(ccw++, (struct PFX_eckd_data *) data, |
2149 | fdata->start_unit, fdata->stop_unit, | |
2150 | DASD_ECKD_CCW_WRITE_CKD, base, startdev); | |
f9a28f7b JBJ |
2151 | /* grant subsystem permission to format R0 */ |
2152 | if (r0_perm) | |
d42e1712 SH |
2153 | ((struct PFX_eckd_data *)data) |
2154 | ->define_extent.ga_extended |= 0x04; | |
2155 | data += sizeof(struct PFX_eckd_data); | |
1da177e4 LT |
2156 | ccw[-1].flags |= CCW_FLAG_CC; |
2157 | locate_record(ccw++, (struct LO_eckd_data *) data, | |
d42e1712 SH |
2158 | fdata->start_unit, 0, rpt*nr_tracks, |
2159 | DASD_ECKD_CCW_WRITE_CKD, base, | |
1da177e4 LT |
2160 | fdata->blksize); |
2161 | data += sizeof(struct LO_eckd_data); | |
2162 | break; | |
2163 | case 0x01: /* Write record zero + format track. */ | |
d42e1712 SH |
2164 | prefix(ccw++, (struct PFX_eckd_data *) data, |
2165 | fdata->start_unit, fdata->stop_unit, | |
2166 | DASD_ECKD_CCW_WRITE_RECORD_ZERO, | |
2167 | base, startdev); | |
2168 | data += sizeof(struct PFX_eckd_data); | |
1da177e4 LT |
2169 | ccw[-1].flags |= CCW_FLAG_CC; |
2170 | locate_record(ccw++, (struct LO_eckd_data *) data, | |
d42e1712 SH |
2171 | fdata->start_unit, 0, rpt * nr_tracks + 1, |
2172 | DASD_ECKD_CCW_WRITE_RECORD_ZERO, base, | |
2173 | base->block->bp_block); | |
1da177e4 LT |
2174 | data += sizeof(struct LO_eckd_data); |
2175 | break; | |
2176 | case 0x04: /* Invalidate track. */ | |
d42e1712 SH |
2177 | prefix(ccw++, (struct PFX_eckd_data *) data, |
2178 | fdata->start_unit, fdata->stop_unit, | |
2179 | DASD_ECKD_CCW_WRITE_CKD, base, startdev); | |
2180 | data += sizeof(struct PFX_eckd_data); | |
1da177e4 LT |
2181 | ccw[-1].flags |= CCW_FLAG_CC; |
2182 | locate_record(ccw++, (struct LO_eckd_data *) data, | |
2183 | fdata->start_unit, 0, 1, | |
d42e1712 | 2184 | DASD_ECKD_CCW_WRITE_CKD, base, 8); |
1da177e4 LT |
2185 | data += sizeof(struct LO_eckd_data); |
2186 | break; | |
2187 | } | |
d42e1712 SH |
2188 | |
2189 | for (j = 0; j < nr_tracks; j++) { | |
2190 | /* calculate cylinder and head for the current track */ | |
2191 | set_ch_t(&address, | |
2192 | (fdata->start_unit + j) / | |
2193 | base_priv->rdc_data.trk_per_cyl, | |
2194 | (fdata->start_unit + j) % | |
2195 | base_priv->rdc_data.trk_per_cyl); | |
2196 | if (intensity & 0x01) { /* write record zero */ | |
1da177e4 LT |
2197 | ect = (struct eckd_count *) data; |
2198 | data += sizeof(struct eckd_count); | |
b44b0ab3 SW |
2199 | ect->cyl = address.cyl; |
2200 | ect->head = address.head; | |
d42e1712 | 2201 | ect->record = 0; |
1da177e4 | 2202 | ect->kl = 0; |
d42e1712 | 2203 | ect->dl = 8; |
1da177e4 | 2204 | ccw[-1].flags |= CCW_FLAG_CC; |
d42e1712 | 2205 | ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; |
1da177e4 LT |
2206 | ccw->flags = CCW_FLAG_SLI; |
2207 | ccw->count = 8; | |
2208 | ccw->cda = (__u32)(addr_t) ect; | |
2209 | ccw++; | |
2210 | } | |
d42e1712 SH |
2211 | if ((intensity & ~0x08) & 0x04) { /* erase track */ |
2212 | ect = (struct eckd_count *) data; | |
2213 | data += sizeof(struct eckd_count); | |
2214 | ect->cyl = address.cyl; | |
2215 | ect->head = address.head; | |
2216 | ect->record = 1; | |
2217 | ect->kl = 0; | |
2218 | ect->dl = 0; | |
2219 | ccw[-1].flags |= CCW_FLAG_CC; | |
2220 | ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; | |
2221 | ccw->flags = CCW_FLAG_SLI; | |
2222 | ccw->count = 8; | |
2223 | ccw->cda = (__u32)(addr_t) ect; | |
2224 | } else { /* write remaining records */ | |
2225 | for (i = 0; i < rpt; i++) { | |
2226 | ect = (struct eckd_count *) data; | |
2227 | data += sizeof(struct eckd_count); | |
2228 | ect->cyl = address.cyl; | |
2229 | ect->head = address.head; | |
2230 | ect->record = i + 1; | |
2231 | ect->kl = 0; | |
2232 | ect->dl = fdata->blksize; | |
2233 | /* | |
2234 | * Check for special tracks 0-1 | |
2235 | * when formatting CDL | |
2236 | */ | |
2237 | if ((intensity & 0x08) && | |
2238 | fdata->start_unit == 0) { | |
2239 | if (i < 3) { | |
2240 | ect->kl = 4; | |
2241 | ect->dl = sizes_trk0[i] - 4; | |
2242 | } | |
2243 | } | |
2244 | if ((intensity & 0x08) && | |
2245 | fdata->start_unit == 1) { | |
2246 | ect->kl = 44; | |
2247 | ect->dl = LABEL_SIZE - 44; | |
2248 | } | |
2249 | ccw[-1].flags |= CCW_FLAG_CC; | |
2250 | if (i != 0 || j == 0) | |
2251 | ccw->cmd_code = | |
2252 | DASD_ECKD_CCW_WRITE_CKD; | |
2253 | else | |
2254 | ccw->cmd_code = | |
2255 | DASD_ECKD_CCW_WRITE_CKD_MT; | |
2256 | ccw->flags = CCW_FLAG_SLI; | |
2257 | ccw->count = 8; | |
2258 | ccw->cda = (__u32)(addr_t) ect; | |
2259 | ccw++; | |
2260 | } | |
2261 | } | |
1da177e4 | 2262 | } |
d42e1712 SH |
2263 | |
2264 | fcp->startdev = startdev; | |
2265 | fcp->memdev = startdev; | |
eb6e199b | 2266 | fcp->retries = 256; |
d42e1712 | 2267 | fcp->expires = startdev->default_expires * HZ; |
1aae0560 | 2268 | fcp->buildclk = get_tod_clock(); |
1da177e4 | 2269 | fcp->status = DASD_CQR_FILLED; |
d42e1712 | 2270 | |
1da177e4 LT |
2271 | return fcp; |
2272 | } | |
2273 | ||
d42e1712 SH |
2274 | static int |
2275 | dasd_eckd_format_device(struct dasd_device *base, | |
2276 | struct format_data_t *fdata) | |
2277 | { | |
2278 | struct dasd_ccw_req *cqr, *n; | |
2279 | struct dasd_block *block; | |
2280 | struct dasd_eckd_private *private; | |
2281 | struct list_head format_queue; | |
2282 | struct dasd_device *device; | |
2283 | int old_stop, format_step; | |
2284 | int step, rc = 0; | |
2285 | ||
2286 | block = base->block; | |
2287 | private = (struct dasd_eckd_private *) base->private; | |
2288 | ||
2289 | /* Sanity checks. */ | |
2290 | if (fdata->start_unit >= | |
2291 | (private->real_cyl * private->rdc_data.trk_per_cyl)) { | |
2292 | dev_warn(&base->cdev->dev, | |
2293 | "Start track number %u used in formatting is too big\n", | |
2294 | fdata->start_unit); | |
2295 | return -EINVAL; | |
2296 | } | |
2297 | if (fdata->stop_unit >= | |
2298 | (private->real_cyl * private->rdc_data.trk_per_cyl)) { | |
2299 | dev_warn(&base->cdev->dev, | |
2300 | "Stop track number %u used in formatting is too big\n", | |
2301 | fdata->stop_unit); | |
2302 | return -EINVAL; | |
2303 | } | |
2304 | if (fdata->start_unit > fdata->stop_unit) { | |
2305 | dev_warn(&base->cdev->dev, | |
2306 | "Start track %u used in formatting exceeds end track\n", | |
2307 | fdata->start_unit); | |
2308 | return -EINVAL; | |
2309 | } | |
2310 | if (dasd_check_blocksize(fdata->blksize) != 0) { | |
2311 | dev_warn(&base->cdev->dev, | |
2312 | "The DASD cannot be formatted with block size %u\n", | |
2313 | fdata->blksize); | |
2314 | return -EINVAL; | |
2315 | } | |
2316 | ||
2317 | INIT_LIST_HEAD(&format_queue); | |
2318 | old_stop = fdata->stop_unit; | |
2319 | ||
2320 | while (fdata->start_unit <= 1) { | |
2321 | fdata->stop_unit = fdata->start_unit; | |
2322 | cqr = dasd_eckd_build_format(base, fdata); | |
2323 | list_add(&cqr->blocklist, &format_queue); | |
2324 | ||
2325 | fdata->stop_unit = old_stop; | |
2326 | fdata->start_unit++; | |
2327 | ||
2328 | if (fdata->start_unit > fdata->stop_unit) | |
2329 | goto sleep; | |
2330 | } | |
2331 | ||
2332 | retry: | |
2333 | format_step = 255 / recs_per_track(&private->rdc_data, 0, | |
2334 | fdata->blksize); | |
2335 | while (fdata->start_unit <= old_stop) { | |
2336 | step = fdata->stop_unit - fdata->start_unit + 1; | |
2337 | if (step > format_step) | |
2338 | fdata->stop_unit = fdata->start_unit + format_step - 1; | |
2339 | ||
2340 | cqr = dasd_eckd_build_format(base, fdata); | |
2341 | if (IS_ERR(cqr)) { | |
2342 | if (PTR_ERR(cqr) == -ENOMEM) { | |
2343 | /* | |
2344 | * not enough memory available | |
2345 | * go to out and start requests | |
2346 | * retry after first requests were finished | |
2347 | */ | |
2348 | fdata->stop_unit = old_stop; | |
2349 | goto sleep; | |
2350 | } else | |
2351 | return PTR_ERR(cqr); | |
2352 | } | |
2353 | list_add(&cqr->blocklist, &format_queue); | |
2354 | ||
2355 | fdata->start_unit = fdata->stop_unit + 1; | |
2356 | fdata->stop_unit = old_stop; | |
2357 | } | |
2358 | ||
2359 | sleep: | |
2360 | dasd_sleep_on_queue(&format_queue); | |
2361 | ||
2362 | list_for_each_entry_safe(cqr, n, &format_queue, blocklist) { | |
2363 | device = cqr->startdev; | |
2364 | private = (struct dasd_eckd_private *) device->private; | |
2365 | if (cqr->status == DASD_CQR_FAILED) | |
2366 | rc = -EIO; | |
2367 | list_del_init(&cqr->blocklist); | |
2368 | dasd_sfree_request(cqr, device); | |
2369 | private->count--; | |
2370 | } | |
2371 | ||
2372 | /* | |
2373 | * in case of ENOMEM we need to retry after | |
2374 | * first requests are finished | |
2375 | */ | |
2376 | if (fdata->start_unit <= fdata->stop_unit) | |
2377 | goto retry; | |
2378 | ||
2379 | return rc; | |
2380 | } | |
2381 | ||
8e09f215 | 2382 | static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) |
1da177e4 | 2383 | { |
8e09f215 SW |
2384 | cqr->status = DASD_CQR_FILLED; |
2385 | if (cqr->block && (cqr->startdev != cqr->block->base)) { | |
2386 | dasd_eckd_reset_ccw_to_base_io(cqr); | |
2387 | cqr->startdev = cqr->block->base; | |
a4d26c6a | 2388 | cqr->lpm = cqr->block->base->path_data.opm; |
1da177e4 | 2389 | } |
8e09f215 | 2390 | }; |
1da177e4 LT |
2391 | |
2392 | static dasd_erp_fn_t | |
2393 | dasd_eckd_erp_action(struct dasd_ccw_req * cqr) | |
2394 | { | |
8e09f215 | 2395 | struct dasd_device *device = (struct dasd_device *) cqr->startdev; |
1da177e4 LT |
2396 | struct ccw_device *cdev = device->cdev; |
2397 | ||
2398 | switch (cdev->id.cu_type) { | |
2399 | case 0x3990: | |
2400 | case 0x2105: | |
2401 | case 0x2107: | |
2402 | case 0x1750: | |
2403 | return dasd_3990_erp_action; | |
2404 | case 0x9343: | |
2405 | case 0x3880: | |
2406 | default: | |
2407 | return dasd_default_erp_action; | |
2408 | } | |
2409 | } | |
2410 | ||
2411 | static dasd_erp_fn_t | |
2412 | dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) | |
2413 | { | |
2414 | return dasd_default_erp_postaction; | |
2415 | } | |
2416 | ||
5a27e60d SW |
2417 | static void dasd_eckd_check_for_device_change(struct dasd_device *device, |
2418 | struct dasd_ccw_req *cqr, | |
2419 | struct irb *irb) | |
8e09f215 SW |
2420 | { |
2421 | char mask; | |
f3eb5384 | 2422 | char *sense = NULL; |
501183f2 | 2423 | struct dasd_eckd_private *private; |
8e09f215 | 2424 | |
501183f2 | 2425 | private = (struct dasd_eckd_private *) device->private; |
8e09f215 SW |
2426 | /* first of all check for state change pending interrupt */ |
2427 | mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; | |
f3eb5384 | 2428 | if ((scsw_dstat(&irb->scsw) & mask) == mask) { |
c8d1c0ff SH |
2429 | /* |
2430 | * for alias only, not in offline processing | |
2431 | * and only if not suspended | |
2432 | */ | |
501183f2 | 2433 | if (!device->block && private->lcu && |
25e2cf1c | 2434 | device->state == DASD_STATE_ONLINE && |
c8d1c0ff SH |
2435 | !test_bit(DASD_FLAG_OFFLINE, &device->flags) && |
2436 | !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { | |
501183f2 SH |
2437 | /* |
2438 | * the state change could be caused by an alias | |
2439 | * reassignment remove device from alias handling | |
2440 | * to prevent new requests from being scheduled on | |
2441 | * the wrong alias device | |
2442 | */ | |
2443 | dasd_alias_remove_device(device); | |
2444 | ||
2445 | /* schedule worker to reload device */ | |
2446 | dasd_reload_device(device); | |
2447 | } | |
8e09f215 SW |
2448 | dasd_generic_handle_state_change(device); |
2449 | return; | |
2450 | } | |
2451 | ||
a5a0061f | 2452 | sense = dasd_get_sense(irb); |
5a27e60d SW |
2453 | if (!sense) |
2454 | return; | |
2455 | ||
2456 | /* summary unit check */ | |
c7a29e56 | 2457 | if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && |
a5a0061f | 2458 | (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { |
8e09f215 SW |
2459 | dasd_alias_handle_summary_unit_check(device, irb); |
2460 | return; | |
2461 | } | |
2462 | ||
f60c768c | 2463 | /* service information message SIM */ |
5a27e60d | 2464 | if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && |
f3eb5384 SW |
2465 | ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { |
2466 | dasd_3990_erp_handle_sim(device, sense); | |
f60c768c SH |
2467 | return; |
2468 | } | |
2469 | ||
5a27e60d SW |
2470 | /* loss of device reservation is handled via base devices only |
2471 | * as alias devices may be used with several bases | |
2472 | */ | |
c7a29e56 SW |
2473 | if (device->block && (sense[27] & DASD_SENSE_BIT_0) && |
2474 | (sense[7] == 0x3F) && | |
5a27e60d SW |
2475 | (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && |
2476 | test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { | |
2477 | if (device->features & DASD_FEATURE_FAILONSLCK) | |
2478 | set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); | |
2479 | clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); | |
2480 | dev_err(&device->cdev->dev, | |
2481 | "The device reservation was lost\n"); | |
ada3df91 | 2482 | } |
5a27e60d | 2483 | } |
f3eb5384 SW |
2484 | |
2485 | static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( | |
2486 | struct dasd_device *startdev, | |
8e09f215 | 2487 | struct dasd_block *block, |
f3eb5384 SW |
2488 | struct request *req, |
2489 | sector_t first_rec, | |
2490 | sector_t last_rec, | |
2491 | sector_t first_trk, | |
2492 | sector_t last_trk, | |
2493 | unsigned int first_offs, | |
2494 | unsigned int last_offs, | |
2495 | unsigned int blk_per_trk, | |
2496 | unsigned int blksize) | |
1da177e4 LT |
2497 | { |
2498 | struct dasd_eckd_private *private; | |
2499 | unsigned long *idaws; | |
2500 | struct LO_eckd_data *LO_data; | |
2501 | struct dasd_ccw_req *cqr; | |
2502 | struct ccw1 *ccw; | |
5705f702 | 2503 | struct req_iterator iter; |
1da177e4 LT |
2504 | struct bio_vec *bv; |
2505 | char *dst; | |
f3eb5384 | 2506 | unsigned int off; |
1da177e4 | 2507 | int count, cidaw, cplength, datasize; |
f3eb5384 | 2508 | sector_t recid; |
1da177e4 | 2509 | unsigned char cmd, rcmd; |
8e09f215 SW |
2510 | int use_prefix; |
2511 | struct dasd_device *basedev; | |
1da177e4 | 2512 | |
8e09f215 SW |
2513 | basedev = block->base; |
2514 | private = (struct dasd_eckd_private *) basedev->private; | |
1da177e4 LT |
2515 | if (rq_data_dir(req) == READ) |
2516 | cmd = DASD_ECKD_CCW_READ_MT; | |
2517 | else if (rq_data_dir(req) == WRITE) | |
2518 | cmd = DASD_ECKD_CCW_WRITE_MT; | |
2519 | else | |
2520 | return ERR_PTR(-EINVAL); | |
f3eb5384 | 2521 | |
1da177e4 LT |
2522 | /* Check struct bio and count the number of blocks for the request. */ |
2523 | count = 0; | |
2524 | cidaw = 0; | |
5705f702 | 2525 | rq_for_each_segment(bv, req, iter) { |
6c92e699 JA |
2526 | if (bv->bv_len & (blksize - 1)) |
2527 | /* Eckd can only do full blocks. */ | |
2528 | return ERR_PTR(-EINVAL); | |
8e09f215 | 2529 | count += bv->bv_len >> (block->s2b_shift + 9); |
347a8dc3 | 2530 | #if defined(CONFIG_64BIT) |
6c92e699 | 2531 | if (idal_is_needed (page_address(bv->bv_page), bv->bv_len)) |
8e09f215 | 2532 | cidaw += bv->bv_len >> (block->s2b_shift + 9); |
1da177e4 | 2533 | #endif |
1da177e4 LT |
2534 | } |
2535 | /* Paranoia. */ | |
2536 | if (count != last_rec - first_rec + 1) | |
2537 | return ERR_PTR(-EINVAL); | |
8e09f215 SW |
2538 | |
2539 | /* use the prefix command if available */ | |
2540 | use_prefix = private->features.feature[8] & 0x01; | |
2541 | if (use_prefix) { | |
2542 | /* 1x prefix + number of blocks */ | |
2543 | cplength = 2 + count; | |
2544 | /* 1x prefix + cidaws*sizeof(long) */ | |
2545 | datasize = sizeof(struct PFX_eckd_data) + | |
2546 | sizeof(struct LO_eckd_data) + | |
2547 | cidaw * sizeof(unsigned long); | |
2548 | } else { | |
2549 | /* 1x define extent + 1x locate record + number of blocks */ | |
2550 | cplength = 2 + count; | |
2551 | /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ | |
2552 | datasize = sizeof(struct DE_eckd_data) + | |
2553 | sizeof(struct LO_eckd_data) + | |
2554 | cidaw * sizeof(unsigned long); | |
2555 | } | |
1da177e4 LT |
2556 | /* Find out the number of additional locate record ccws for cdl. */ |
2557 | if (private->uses_cdl && first_rec < 2*blk_per_trk) { | |
2558 | if (last_rec >= 2*blk_per_trk) | |
2559 | count = 2*blk_per_trk - first_rec; | |
2560 | cplength += count; | |
2561 | datasize += count*sizeof(struct LO_eckd_data); | |
2562 | } | |
2563 | /* Allocate the ccw request. */ | |
68b781fe SH |
2564 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, |
2565 | startdev); | |
1da177e4 LT |
2566 | if (IS_ERR(cqr)) |
2567 | return cqr; | |
2568 | ccw = cqr->cpaddr; | |
8e09f215 SW |
2569 | /* First ccw is define extent or prefix. */ |
2570 | if (use_prefix) { | |
2571 | if (prefix(ccw++, cqr->data, first_trk, | |
2572 | last_trk, cmd, basedev, startdev) == -EAGAIN) { | |
2573 | /* Clock not in sync and XRC is enabled. | |
2574 | * Try again later. | |
2575 | */ | |
2576 | dasd_sfree_request(cqr, startdev); | |
2577 | return ERR_PTR(-EAGAIN); | |
2578 | } | |
2579 | idaws = (unsigned long *) (cqr->data + | |
2580 | sizeof(struct PFX_eckd_data)); | |
2581 | } else { | |
2582 | if (define_extent(ccw++, cqr->data, first_trk, | |
b38f27e8 | 2583 | last_trk, cmd, basedev) == -EAGAIN) { |
8e09f215 SW |
2584 | /* Clock not in sync and XRC is enabled. |
2585 | * Try again later. | |
2586 | */ | |
2587 | dasd_sfree_request(cqr, startdev); | |
2588 | return ERR_PTR(-EAGAIN); | |
2589 | } | |
2590 | idaws = (unsigned long *) (cqr->data + | |
2591 | sizeof(struct DE_eckd_data)); | |
d54853ef | 2592 | } |
1da177e4 | 2593 | /* Build locate_record+read/write/ccws. */ |
1da177e4 LT |
2594 | LO_data = (struct LO_eckd_data *) (idaws + cidaw); |
2595 | recid = first_rec; | |
2596 | if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { | |
2597 | /* Only standard blocks so there is just one locate record. */ | |
2598 | ccw[-1].flags |= CCW_FLAG_CC; | |
2599 | locate_record(ccw++, LO_data++, first_trk, first_offs + 1, | |
8e09f215 | 2600 | last_rec - recid + 1, cmd, basedev, blksize); |
1da177e4 | 2601 | } |
5705f702 | 2602 | rq_for_each_segment(bv, req, iter) { |
1da177e4 LT |
2603 | dst = page_address(bv->bv_page) + bv->bv_offset; |
2604 | if (dasd_page_cache) { | |
2605 | char *copy = kmem_cache_alloc(dasd_page_cache, | |
441e143e | 2606 | GFP_DMA | __GFP_NOWARN); |
1da177e4 LT |
2607 | if (copy && rq_data_dir(req) == WRITE) |
2608 | memcpy(copy + bv->bv_offset, dst, bv->bv_len); | |
2609 | if (copy) | |
2610 | dst = copy + bv->bv_offset; | |
2611 | } | |
2612 | for (off = 0; off < bv->bv_len; off += blksize) { | |
2613 | sector_t trkid = recid; | |
2614 | unsigned int recoffs = sector_div(trkid, blk_per_trk); | |
2615 | rcmd = cmd; | |
2616 | count = blksize; | |
2617 | /* Locate record for cdl special block ? */ | |
2618 | if (private->uses_cdl && recid < 2*blk_per_trk) { | |
2619 | if (dasd_eckd_cdl_special(blk_per_trk, recid)){ | |
2620 | rcmd |= 0x8; | |
2621 | count = dasd_eckd_cdl_reclen(recid); | |
ec5883ab HH |
2622 | if (count < blksize && |
2623 | rq_data_dir(req) == READ) | |
1da177e4 LT |
2624 | memset(dst + count, 0xe5, |
2625 | blksize - count); | |
2626 | } | |
2627 | ccw[-1].flags |= CCW_FLAG_CC; | |
2628 | locate_record(ccw++, LO_data++, | |
2629 | trkid, recoffs + 1, | |
8e09f215 | 2630 | 1, rcmd, basedev, count); |
1da177e4 LT |
2631 | } |
2632 | /* Locate record for standard blocks ? */ | |
2633 | if (private->uses_cdl && recid == 2*blk_per_trk) { | |
2634 | ccw[-1].flags |= CCW_FLAG_CC; | |
2635 | locate_record(ccw++, LO_data++, | |
2636 | trkid, recoffs + 1, | |
2637 | last_rec - recid + 1, | |
8e09f215 | 2638 | cmd, basedev, count); |
1da177e4 LT |
2639 | } |
2640 | /* Read/write ccw. */ | |
2641 | ccw[-1].flags |= CCW_FLAG_CC; | |
2642 | ccw->cmd_code = rcmd; | |
2643 | ccw->count = count; | |
2644 | if (idal_is_needed(dst, blksize)) { | |
2645 | ccw->cda = (__u32)(addr_t) idaws; | |
2646 | ccw->flags = CCW_FLAG_IDA; | |
2647 | idaws = idal_create_words(idaws, dst, blksize); | |
2648 | } else { | |
2649 | ccw->cda = (__u32)(addr_t) dst; | |
2650 | ccw->flags = 0; | |
2651 | } | |
2652 | ccw++; | |
2653 | dst += blksize; | |
2654 | recid++; | |
2655 | } | |
2656 | } | |
13de227b HS |
2657 | if (blk_noretry_request(req) || |
2658 | block->base->features & DASD_FEATURE_FAILFAST) | |
1c01b8a5 | 2659 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
8e09f215 SW |
2660 | cqr->startdev = startdev; |
2661 | cqr->memdev = startdev; | |
2662 | cqr->block = block; | |
7c8faa86 | 2663 | cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ |
a4d26c6a | 2664 | cqr->lpm = startdev->path_data.ppm; |
1f1ee9ad | 2665 | cqr->retries = startdev->default_retries; |
1aae0560 | 2666 | cqr->buildclk = get_tod_clock(); |
1da177e4 LT |
2667 | cqr->status = DASD_CQR_FILLED; |
2668 | return cqr; | |
2669 | } | |
2670 | ||
f3eb5384 SW |
2671 | static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( |
2672 | struct dasd_device *startdev, | |
2673 | struct dasd_block *block, | |
2674 | struct request *req, | |
2675 | sector_t first_rec, | |
2676 | sector_t last_rec, | |
2677 | sector_t first_trk, | |
2678 | sector_t last_trk, | |
2679 | unsigned int first_offs, | |
2680 | unsigned int last_offs, | |
2681 | unsigned int blk_per_trk, | |
2682 | unsigned int blksize) | |
2683 | { | |
f3eb5384 SW |
2684 | unsigned long *idaws; |
2685 | struct dasd_ccw_req *cqr; | |
2686 | struct ccw1 *ccw; | |
2687 | struct req_iterator iter; | |
2688 | struct bio_vec *bv; | |
2689 | char *dst, *idaw_dst; | |
2690 | unsigned int cidaw, cplength, datasize; | |
2691 | unsigned int tlf; | |
2692 | sector_t recid; | |
2693 | unsigned char cmd; | |
2694 | struct dasd_device *basedev; | |
2695 | unsigned int trkcount, count, count_to_trk_end; | |
2696 | unsigned int idaw_len, seg_len, part_len, len_to_track_end; | |
2697 | unsigned char new_track, end_idaw; | |
2698 | sector_t trkid; | |
2699 | unsigned int recoffs; | |
2700 | ||
2701 | basedev = block->base; | |
f3eb5384 SW |
2702 | if (rq_data_dir(req) == READ) |
2703 | cmd = DASD_ECKD_CCW_READ_TRACK_DATA; | |
2704 | else if (rq_data_dir(req) == WRITE) | |
2705 | cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; | |
2706 | else | |
2707 | return ERR_PTR(-EINVAL); | |
2708 | ||
2709 | /* Track based I/O needs IDAWs for each page, and not just for | |
2710 | * 64 bit addresses. We need additional idals for pages | |
2711 | * that get filled from two tracks, so we use the number | |
2712 | * of records as upper limit. | |
2713 | */ | |
2714 | cidaw = last_rec - first_rec + 1; | |
2715 | trkcount = last_trk - first_trk + 1; | |
2716 | ||
2717 | /* 1x prefix + one read/write ccw per track */ | |
2718 | cplength = 1 + trkcount; | |
2719 | ||
2720 | /* on 31-bit we need space for two 32 bit addresses per page | |
2721 | * on 64-bit one 64 bit address | |
2722 | */ | |
2723 | datasize = sizeof(struct PFX_eckd_data) + | |
2724 | cidaw * sizeof(unsigned long long); | |
2725 | ||
2726 | /* Allocate the ccw request. */ | |
68b781fe SH |
2727 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, |
2728 | startdev); | |
f3eb5384 SW |
2729 | if (IS_ERR(cqr)) |
2730 | return cqr; | |
2731 | ccw = cqr->cpaddr; | |
2732 | /* transfer length factor: how many bytes to read from the last track */ | |
2733 | if (first_trk == last_trk) | |
2734 | tlf = last_offs - first_offs + 1; | |
2735 | else | |
2736 | tlf = last_offs + 1; | |
2737 | tlf *= blksize; | |
2738 | ||
2739 | if (prefix_LRE(ccw++, cqr->data, first_trk, | |
2740 | last_trk, cmd, basedev, startdev, | |
2741 | 1 /* format */, first_offs + 1, | |
2742 | trkcount, blksize, | |
2743 | tlf) == -EAGAIN) { | |
2744 | /* Clock not in sync and XRC is enabled. | |
2745 | * Try again later. | |
2746 | */ | |
2747 | dasd_sfree_request(cqr, startdev); | |
2748 | return ERR_PTR(-EAGAIN); | |
2749 | } | |
2750 | ||
2751 | /* | |
2752 | * The translation of request into ccw programs must meet the | |
2753 | * following conditions: | |
2754 | * - all idaws but the first and the last must address full pages | |
2755 | * (or 2K blocks on 31-bit) | |
2756 | * - the scope of a ccw and it's idal ends with the track boundaries | |
2757 | */ | |
2758 | idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); | |
2759 | recid = first_rec; | |
2760 | new_track = 1; | |
2761 | end_idaw = 0; | |
2762 | len_to_track_end = 0; | |
246ccea1 | 2763 | idaw_dst = NULL; |
f3eb5384 SW |
2764 | idaw_len = 0; |
2765 | rq_for_each_segment(bv, req, iter) { | |
2766 | dst = page_address(bv->bv_page) + bv->bv_offset; | |
2767 | seg_len = bv->bv_len; | |
2768 | while (seg_len) { | |
2769 | if (new_track) { | |
2770 | trkid = recid; | |
2771 | recoffs = sector_div(trkid, blk_per_trk); | |
2772 | count_to_trk_end = blk_per_trk - recoffs; | |
2773 | count = min((last_rec - recid + 1), | |
2774 | (sector_t)count_to_trk_end); | |
2775 | len_to_track_end = count * blksize; | |
2776 | ccw[-1].flags |= CCW_FLAG_CC; | |
2777 | ccw->cmd_code = cmd; | |
2778 | ccw->count = len_to_track_end; | |
2779 | ccw->cda = (__u32)(addr_t)idaws; | |
2780 | ccw->flags = CCW_FLAG_IDA; | |
2781 | ccw++; | |
2782 | recid += count; | |
2783 | new_track = 0; | |
52db45c3 SW |
2784 | /* first idaw for a ccw may start anywhere */ |
2785 | if (!idaw_dst) | |
2786 | idaw_dst = dst; | |
f3eb5384 | 2787 | } |
52db45c3 SW |
2788 | /* If we start a new idaw, we must make sure that it |
2789 | * starts on an IDA_BLOCK_SIZE boundary. | |
f3eb5384 SW |
2790 | * If we continue an idaw, we must make sure that the |
2791 | * current segment begins where the so far accumulated | |
2792 | * idaw ends | |
2793 | */ | |
52db45c3 SW |
2794 | if (!idaw_dst) { |
2795 | if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { | |
2796 | dasd_sfree_request(cqr, startdev); | |
2797 | return ERR_PTR(-ERANGE); | |
2798 | } else | |
2799 | idaw_dst = dst; | |
2800 | } | |
f3eb5384 SW |
2801 | if ((idaw_dst + idaw_len) != dst) { |
2802 | dasd_sfree_request(cqr, startdev); | |
2803 | return ERR_PTR(-ERANGE); | |
2804 | } | |
2805 | part_len = min(seg_len, len_to_track_end); | |
2806 | seg_len -= part_len; | |
2807 | dst += part_len; | |
2808 | idaw_len += part_len; | |
2809 | len_to_track_end -= part_len; | |
2810 | /* collected memory area ends on an IDA_BLOCK border, | |
2811 | * -> create an idaw | |
2812 | * idal_create_words will handle cases where idaw_len | |
2813 | * is larger then IDA_BLOCK_SIZE | |
2814 | */ | |
2815 | if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) | |
2816 | end_idaw = 1; | |
2817 | /* We also need to end the idaw at track end */ | |
2818 | if (!len_to_track_end) { | |
2819 | new_track = 1; | |
2820 | end_idaw = 1; | |
2821 | } | |
2822 | if (end_idaw) { | |
2823 | idaws = idal_create_words(idaws, idaw_dst, | |
2824 | idaw_len); | |
246ccea1 | 2825 | idaw_dst = NULL; |
f3eb5384 SW |
2826 | idaw_len = 0; |
2827 | end_idaw = 0; | |
2828 | } | |
2829 | } | |
2830 | } | |
2831 | ||
2832 | if (blk_noretry_request(req) || | |
2833 | block->base->features & DASD_FEATURE_FAILFAST) | |
2834 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); | |
2835 | cqr->startdev = startdev; | |
2836 | cqr->memdev = startdev; | |
2837 | cqr->block = block; | |
7c8faa86 | 2838 | cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ |
a4d26c6a | 2839 | cqr->lpm = startdev->path_data.ppm; |
1f1ee9ad | 2840 | cqr->retries = startdev->default_retries; |
1aae0560 | 2841 | cqr->buildclk = get_tod_clock(); |
f3eb5384 SW |
2842 | cqr->status = DASD_CQR_FILLED; |
2843 | return cqr; | |
2844 | } | |
2845 | ||
2846 | static int prepare_itcw(struct itcw *itcw, | |
2847 | unsigned int trk, unsigned int totrk, int cmd, | |
2848 | struct dasd_device *basedev, | |
2849 | struct dasd_device *startdev, | |
2850 | unsigned int rec_on_trk, int count, | |
2851 | unsigned int blksize, | |
2852 | unsigned int total_data_size, | |
2853 | unsigned int tlf, | |
2854 | unsigned int blk_per_trk) | |
2855 | { | |
2856 | struct PFX_eckd_data pfxdata; | |
2857 | struct dasd_eckd_private *basepriv, *startpriv; | |
2858 | struct DE_eckd_data *dedata; | |
2859 | struct LRE_eckd_data *lredata; | |
2860 | struct dcw *dcw; | |
2861 | ||
2862 | u32 begcyl, endcyl; | |
2863 | u16 heads, beghead, endhead; | |
2864 | u8 pfx_cmd; | |
2865 | ||
2866 | int rc = 0; | |
2867 | int sector = 0; | |
2868 | int dn, d; | |
2869 | ||
2870 | ||
2871 | /* setup prefix data */ | |
2872 | basepriv = (struct dasd_eckd_private *) basedev->private; | |
2873 | startpriv = (struct dasd_eckd_private *) startdev->private; | |
2874 | dedata = &pfxdata.define_extent; | |
2875 | lredata = &pfxdata.locate_record; | |
2876 | ||
2877 | memset(&pfxdata, 0, sizeof(pfxdata)); | |
2878 | pfxdata.format = 1; /* PFX with LRE */ | |
2879 | pfxdata.base_address = basepriv->ned->unit_addr; | |
2880 | pfxdata.base_lss = basepriv->ned->ID; | |
2881 | pfxdata.validity.define_extent = 1; | |
2882 | ||
2883 | /* private uid is kept up to date, conf_data may be outdated */ | |
2884 | if (startpriv->uid.type != UA_BASE_DEVICE) { | |
2885 | pfxdata.validity.verify_base = 1; | |
2886 | if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) | |
2887 | pfxdata.validity.hyper_pav = 1; | |
2888 | } | |
2889 | ||
2890 | switch (cmd) { | |
2891 | case DASD_ECKD_CCW_READ_TRACK_DATA: | |
2892 | dedata->mask.perm = 0x1; | |
2893 | dedata->attributes.operation = basepriv->attrib.operation; | |
2894 | dedata->blk_size = blksize; | |
2895 | dedata->ga_extended |= 0x42; | |
2896 | lredata->operation.orientation = 0x0; | |
2897 | lredata->operation.operation = 0x0C; | |
2898 | lredata->auxiliary.check_bytes = 0x01; | |
2899 | pfx_cmd = DASD_ECKD_CCW_PFX_READ; | |
2900 | break; | |
2901 | case DASD_ECKD_CCW_WRITE_TRACK_DATA: | |
2902 | dedata->mask.perm = 0x02; | |
2903 | dedata->attributes.operation = basepriv->attrib.operation; | |
2904 | dedata->blk_size = blksize; | |
2905 | rc = check_XRC_on_prefix(&pfxdata, basedev); | |
2906 | dedata->ga_extended |= 0x42; | |
2907 | lredata->operation.orientation = 0x0; | |
2908 | lredata->operation.operation = 0x3F; | |
2909 | lredata->extended_operation = 0x23; | |
2910 | lredata->auxiliary.check_bytes = 0x2; | |
2911 | pfx_cmd = DASD_ECKD_CCW_PFX; | |
2912 | break; | |
2913 | default: | |
2914 | DBF_DEV_EVENT(DBF_ERR, basedev, | |
2915 | "prepare itcw, unknown opcode 0x%x", cmd); | |
2916 | BUG(); | |
2917 | break; | |
2918 | } | |
2919 | if (rc) | |
2920 | return rc; | |
2921 | ||
2922 | dedata->attributes.mode = 0x3; /* ECKD */ | |
2923 | ||
2924 | heads = basepriv->rdc_data.trk_per_cyl; | |
2925 | begcyl = trk / heads; | |
2926 | beghead = trk % heads; | |
2927 | endcyl = totrk / heads; | |
2928 | endhead = totrk % heads; | |
2929 | ||
2930 | /* check for sequential prestage - enhance cylinder range */ | |
2931 | if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || | |
2932 | dedata->attributes.operation == DASD_SEQ_ACCESS) { | |
2933 | ||
2934 | if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) | |
2935 | endcyl += basepriv->attrib.nr_cyl; | |
2936 | else | |
2937 | endcyl = (basepriv->real_cyl - 1); | |
2938 | } | |
2939 | ||
2940 | set_ch_t(&dedata->beg_ext, begcyl, beghead); | |
2941 | set_ch_t(&dedata->end_ext, endcyl, endhead); | |
2942 | ||
2943 | dedata->ep_format = 0x20; /* records per track is valid */ | |
2944 | dedata->ep_rec_per_track = blk_per_trk; | |
2945 | ||
2946 | if (rec_on_trk) { | |
2947 | switch (basepriv->rdc_data.dev_type) { | |
2948 | case 0x3390: | |
2949 | dn = ceil_quot(blksize + 6, 232); | |
2950 | d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); | |
2951 | sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; | |
2952 | break; | |
2953 | case 0x3380: | |
2954 | d = 7 + ceil_quot(blksize + 12, 32); | |
2955 | sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; | |
2956 | break; | |
2957 | } | |
2958 | } | |
2959 | ||
2960 | lredata->auxiliary.length_valid = 1; | |
2961 | lredata->auxiliary.length_scope = 1; | |
2962 | lredata->auxiliary.imbedded_ccw_valid = 1; | |
2963 | lredata->length = tlf; | |
2964 | lredata->imbedded_ccw = cmd; | |
2965 | lredata->count = count; | |
2966 | lredata->sector = sector; | |
2967 | set_ch_t(&lredata->seek_addr, begcyl, beghead); | |
2968 | lredata->search_arg.cyl = lredata->seek_addr.cyl; | |
2969 | lredata->search_arg.head = lredata->seek_addr.head; | |
2970 | lredata->search_arg.record = rec_on_trk; | |
2971 | ||
2972 | dcw = itcw_add_dcw(itcw, pfx_cmd, 0, | |
2973 | &pfxdata, sizeof(pfxdata), total_data_size); | |
82a7b955 | 2974 | return PTR_RET(dcw); |
f3eb5384 SW |
2975 | } |
2976 | ||
2977 | static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( | |
2978 | struct dasd_device *startdev, | |
2979 | struct dasd_block *block, | |
2980 | struct request *req, | |
2981 | sector_t first_rec, | |
2982 | sector_t last_rec, | |
2983 | sector_t first_trk, | |
2984 | sector_t last_trk, | |
2985 | unsigned int first_offs, | |
2986 | unsigned int last_offs, | |
2987 | unsigned int blk_per_trk, | |
2988 | unsigned int blksize) | |
2989 | { | |
f3eb5384 SW |
2990 | struct dasd_ccw_req *cqr; |
2991 | struct req_iterator iter; | |
2992 | struct bio_vec *bv; | |
2993 | char *dst; | |
2994 | unsigned int trkcount, ctidaw; | |
2995 | unsigned char cmd; | |
2996 | struct dasd_device *basedev; | |
2997 | unsigned int tlf; | |
2998 | struct itcw *itcw; | |
2999 | struct tidaw *last_tidaw = NULL; | |
3000 | int itcw_op; | |
3001 | size_t itcw_size; | |
ef19298b SW |
3002 | u8 tidaw_flags; |
3003 | unsigned int seg_len, part_len, len_to_track_end; | |
3004 | unsigned char new_track; | |
3005 | sector_t recid, trkid; | |
3006 | unsigned int offs; | |
3007 | unsigned int count, count_to_trk_end; | |
cd10502b | 3008 | int ret; |
f3eb5384 SW |
3009 | |
3010 | basedev = block->base; | |
f3eb5384 SW |
3011 | if (rq_data_dir(req) == READ) { |
3012 | cmd = DASD_ECKD_CCW_READ_TRACK_DATA; | |
3013 | itcw_op = ITCW_OP_READ; | |
3014 | } else if (rq_data_dir(req) == WRITE) { | |
3015 | cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; | |
3016 | itcw_op = ITCW_OP_WRITE; | |
3017 | } else | |
3018 | return ERR_PTR(-EINVAL); | |
3019 | ||
3020 | /* trackbased I/O needs address all memory via TIDAWs, | |
3021 | * not just for 64 bit addresses. This allows us to map | |
3022 | * each segment directly to one tidaw. | |
ef19298b SW |
3023 | * In the case of write requests, additional tidaws may |
3024 | * be needed when a segment crosses a track boundary. | |
f3eb5384 SW |
3025 | */ |
3026 | trkcount = last_trk - first_trk + 1; | |
3027 | ctidaw = 0; | |
3028 | rq_for_each_segment(bv, req, iter) { | |
3029 | ++ctidaw; | |
3030 | } | |
ef19298b SW |
3031 | if (rq_data_dir(req) == WRITE) |
3032 | ctidaw += (last_trk - first_trk); | |
f3eb5384 SW |
3033 | |
3034 | /* Allocate the ccw request. */ | |
3035 | itcw_size = itcw_calc_size(0, ctidaw, 0); | |
68b781fe | 3036 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); |
f3eb5384 SW |
3037 | if (IS_ERR(cqr)) |
3038 | return cqr; | |
3039 | ||
f3eb5384 SW |
3040 | /* transfer length factor: how many bytes to read from the last track */ |
3041 | if (first_trk == last_trk) | |
3042 | tlf = last_offs - first_offs + 1; | |
3043 | else | |
3044 | tlf = last_offs + 1; | |
3045 | tlf *= blksize; | |
3046 | ||
3047 | itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); | |
ef19298b | 3048 | if (IS_ERR(itcw)) { |
cd10502b JL |
3049 | ret = -EINVAL; |
3050 | goto out_error; | |
ef19298b | 3051 | } |
f3eb5384 | 3052 | cqr->cpaddr = itcw_get_tcw(itcw); |
f3eb5384 SW |
3053 | if (prepare_itcw(itcw, first_trk, last_trk, |
3054 | cmd, basedev, startdev, | |
3055 | first_offs + 1, | |
3056 | trkcount, blksize, | |
3057 | (last_rec - first_rec + 1) * blksize, | |
3058 | tlf, blk_per_trk) == -EAGAIN) { | |
3059 | /* Clock not in sync and XRC is enabled. | |
3060 | * Try again later. | |
3061 | */ | |
cd10502b JL |
3062 | ret = -EAGAIN; |
3063 | goto out_error; | |
f3eb5384 | 3064 | } |
d54cddb6 | 3065 | len_to_track_end = 0; |
f3eb5384 SW |
3066 | /* |
3067 | * A tidaw can address 4k of memory, but must not cross page boundaries | |
3068 | * We can let the block layer handle this by setting | |
3069 | * blk_queue_segment_boundary to page boundaries and | |
3070 | * blk_max_segment_size to page size when setting up the request queue. | |
ef19298b SW |
3071 | * For write requests, a TIDAW must not cross track boundaries, because |
3072 | * we have to set the CBC flag on the last tidaw for each track. | |
f3eb5384 | 3073 | */ |
ef19298b SW |
3074 | if (rq_data_dir(req) == WRITE) { |
3075 | new_track = 1; | |
3076 | recid = first_rec; | |
3077 | rq_for_each_segment(bv, req, iter) { | |
3078 | dst = page_address(bv->bv_page) + bv->bv_offset; | |
3079 | seg_len = bv->bv_len; | |
3080 | while (seg_len) { | |
3081 | if (new_track) { | |
3082 | trkid = recid; | |
3083 | offs = sector_div(trkid, blk_per_trk); | |
3084 | count_to_trk_end = blk_per_trk - offs; | |
3085 | count = min((last_rec - recid + 1), | |
3086 | (sector_t)count_to_trk_end); | |
3087 | len_to_track_end = count * blksize; | |
3088 | recid += count; | |
3089 | new_track = 0; | |
3090 | } | |
3091 | part_len = min(seg_len, len_to_track_end); | |
3092 | seg_len -= part_len; | |
3093 | len_to_track_end -= part_len; | |
3094 | /* We need to end the tidaw at track end */ | |
3095 | if (!len_to_track_end) { | |
3096 | new_track = 1; | |
3097 | tidaw_flags = TIDAW_FLAGS_INSERT_CBC; | |
3098 | } else | |
3099 | tidaw_flags = 0; | |
3100 | last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, | |
3101 | dst, part_len); | |
cd10502b JL |
3102 | if (IS_ERR(last_tidaw)) { |
3103 | ret = -EINVAL; | |
3104 | goto out_error; | |
3105 | } | |
ef19298b SW |
3106 | dst += part_len; |
3107 | } | |
3108 | } | |
3109 | } else { | |
3110 | rq_for_each_segment(bv, req, iter) { | |
3111 | dst = page_address(bv->bv_page) + bv->bv_offset; | |
3112 | last_tidaw = itcw_add_tidaw(itcw, 0x00, | |
3113 | dst, bv->bv_len); | |
cd10502b JL |
3114 | if (IS_ERR(last_tidaw)) { |
3115 | ret = -EINVAL; | |
3116 | goto out_error; | |
3117 | } | |
ef19298b | 3118 | } |
f3eb5384 | 3119 | } |
ef19298b SW |
3120 | last_tidaw->flags |= TIDAW_FLAGS_LAST; |
3121 | last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; | |
f3eb5384 SW |
3122 | itcw_finalize(itcw); |
3123 | ||
3124 | if (blk_noretry_request(req) || | |
3125 | block->base->features & DASD_FEATURE_FAILFAST) | |
3126 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); | |
ef19298b | 3127 | cqr->cpmode = 1; |
f3eb5384 SW |
3128 | cqr->startdev = startdev; |
3129 | cqr->memdev = startdev; | |
3130 | cqr->block = block; | |
7c8faa86 | 3131 | cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ |
a4d26c6a | 3132 | cqr->lpm = startdev->path_data.ppm; |
1f1ee9ad | 3133 | cqr->retries = startdev->default_retries; |
1aae0560 | 3134 | cqr->buildclk = get_tod_clock(); |
f3eb5384 SW |
3135 | cqr->status = DASD_CQR_FILLED; |
3136 | return cqr; | |
cd10502b JL |
3137 | out_error: |
3138 | dasd_sfree_request(cqr, startdev); | |
3139 | return ERR_PTR(ret); | |
f3eb5384 SW |
3140 | } |
3141 | ||
3142 | static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, | |
3143 | struct dasd_block *block, | |
3144 | struct request *req) | |
3145 | { | |
ef19298b | 3146 | int cmdrtd, cmdwtd; |
f3eb5384 | 3147 | int use_prefix; |
ef19298b | 3148 | int fcx_multitrack; |
45b44d76 | 3149 | struct dasd_eckd_private *private; |
f3eb5384 SW |
3150 | struct dasd_device *basedev; |
3151 | sector_t first_rec, last_rec; | |
3152 | sector_t first_trk, last_trk; | |
3153 | unsigned int first_offs, last_offs; | |
3154 | unsigned int blk_per_trk, blksize; | |
3155 | int cdlspecial; | |
ef19298b | 3156 | unsigned int data_size; |
f3eb5384 SW |
3157 | struct dasd_ccw_req *cqr; |
3158 | ||
3159 | basedev = block->base; | |
3160 | private = (struct dasd_eckd_private *) basedev->private; | |
3161 | ||
3162 | /* Calculate number of blocks/records per track. */ | |
3163 | blksize = block->bp_block; | |
3164 | blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); | |
6fca97a9 SH |
3165 | if (blk_per_trk == 0) |
3166 | return ERR_PTR(-EINVAL); | |
f3eb5384 | 3167 | /* Calculate record id of first and last block. */ |
83096ebf | 3168 | first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; |
f3eb5384 SW |
3169 | first_offs = sector_div(first_trk, blk_per_trk); |
3170 | last_rec = last_trk = | |
83096ebf | 3171 | (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; |
f3eb5384 SW |
3172 | last_offs = sector_div(last_trk, blk_per_trk); |
3173 | cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); | |
3174 | ||
ef19298b SW |
3175 | fcx_multitrack = private->features.feature[40] & 0x20; |
3176 | data_size = blk_rq_bytes(req); | |
3177 | /* tpm write request add CBC data on each track boundary */ | |
3178 | if (rq_data_dir(req) == WRITE) | |
3179 | data_size += (last_trk - first_trk) * 4; | |
f3eb5384 SW |
3180 | |
3181 | /* is read track data and write track data in command mode supported? */ | |
3182 | cmdrtd = private->features.feature[9] & 0x20; | |
3183 | cmdwtd = private->features.feature[12] & 0x40; | |
3184 | use_prefix = private->features.feature[8] & 0x01; | |
3185 | ||
3186 | cqr = NULL; | |
3187 | if (cdlspecial || dasd_page_cache) { | |
3188 | /* do nothing, just fall through to the cmd mode single case */ | |
ef19298b SW |
3189 | } else if ((data_size <= private->fcx_max_data) |
3190 | && (fcx_multitrack || (first_trk == last_trk))) { | |
f3eb5384 SW |
3191 | cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, |
3192 | first_rec, last_rec, | |
3193 | first_trk, last_trk, | |
3194 | first_offs, last_offs, | |
3195 | blk_per_trk, blksize); | |
ef19298b SW |
3196 | if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && |
3197 | (PTR_ERR(cqr) != -ENOMEM)) | |
f3eb5384 SW |
3198 | cqr = NULL; |
3199 | } else if (use_prefix && | |
3200 | (((rq_data_dir(req) == READ) && cmdrtd) || | |
3201 | ((rq_data_dir(req) == WRITE) && cmdwtd))) { | |
3202 | cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, | |
3203 | first_rec, last_rec, | |
3204 | first_trk, last_trk, | |
3205 | first_offs, last_offs, | |
3206 | blk_per_trk, blksize); | |
ef19298b SW |
3207 | if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && |
3208 | (PTR_ERR(cqr) != -ENOMEM)) | |
f3eb5384 SW |
3209 | cqr = NULL; |
3210 | } | |
3211 | if (!cqr) | |
3212 | cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, | |
3213 | first_rec, last_rec, | |
3214 | first_trk, last_trk, | |
3215 | first_offs, last_offs, | |
3216 | blk_per_trk, blksize); | |
3217 | return cqr; | |
3218 | } | |
3219 | ||
e4dbb0f2 SH |
3220 | static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev, |
3221 | struct dasd_block *block, | |
3222 | struct request *req) | |
3223 | { | |
e4dbb0f2 SH |
3224 | unsigned long *idaws; |
3225 | struct dasd_device *basedev; | |
3226 | struct dasd_ccw_req *cqr; | |
3227 | struct ccw1 *ccw; | |
3228 | struct req_iterator iter; | |
3229 | struct bio_vec *bv; | |
3230 | char *dst; | |
3231 | unsigned char cmd; | |
3232 | unsigned int trkcount; | |
3233 | unsigned int seg_len, len_to_track_end; | |
3234 | unsigned int first_offs; | |
3235 | unsigned int cidaw, cplength, datasize; | |
3236 | sector_t first_trk, last_trk; | |
3237 | unsigned int pfx_datasize; | |
3238 | ||
3239 | /* | |
3240 | * raw track access needs to be mutiple of 64k and on 64k boundary | |
3241 | */ | |
3242 | if ((blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK) != 0) { | |
3243 | cqr = ERR_PTR(-EINVAL); | |
3244 | goto out; | |
3245 | } | |
3246 | if (((blk_rq_pos(req) + blk_rq_sectors(req)) % | |
3247 | DASD_RAW_SECTORS_PER_TRACK) != 0) { | |
3248 | cqr = ERR_PTR(-EINVAL); | |
3249 | goto out; | |
3250 | } | |
3251 | ||
3252 | first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; | |
3253 | last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / | |
3254 | DASD_RAW_SECTORS_PER_TRACK; | |
3255 | trkcount = last_trk - first_trk + 1; | |
3256 | first_offs = 0; | |
3257 | basedev = block->base; | |
e4dbb0f2 SH |
3258 | |
3259 | if (rq_data_dir(req) == READ) | |
3260 | cmd = DASD_ECKD_CCW_READ_TRACK; | |
3261 | else if (rq_data_dir(req) == WRITE) | |
3262 | cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; | |
3263 | else { | |
3264 | cqr = ERR_PTR(-EINVAL); | |
3265 | goto out; | |
3266 | } | |
3267 | ||
3268 | /* | |
3269 | * Raw track based I/O needs IDAWs for each page, | |
3270 | * and not just for 64 bit addresses. | |
3271 | */ | |
3272 | cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; | |
3273 | ||
3274 | /* 1x prefix + one read/write ccw per track */ | |
3275 | cplength = 1 + trkcount; | |
3276 | ||
3277 | /* | |
3278 | * struct PFX_eckd_data has up to 2 byte as extended parameter | |
3279 | * this is needed for write full track and has to be mentioned | |
25985edc | 3280 | * separately |
e4dbb0f2 SH |
3281 | * add 8 instead of 2 to keep 8 byte boundary |
3282 | */ | |
3283 | pfx_datasize = sizeof(struct PFX_eckd_data) + 8; | |
3284 | ||
3285 | datasize = pfx_datasize + cidaw * sizeof(unsigned long long); | |
3286 | ||
3287 | /* Allocate the ccw request. */ | |
3288 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, | |
3289 | datasize, startdev); | |
3290 | if (IS_ERR(cqr)) | |
3291 | goto out; | |
3292 | ccw = cqr->cpaddr; | |
3293 | ||
3294 | if (prefix_LRE(ccw++, cqr->data, first_trk, last_trk, cmd, | |
3295 | basedev, startdev, 1 /* format */, first_offs + 1, | |
3296 | trkcount, 0, 0) == -EAGAIN) { | |
3297 | /* Clock not in sync and XRC is enabled. | |
3298 | * Try again later. | |
3299 | */ | |
3300 | dasd_sfree_request(cqr, startdev); | |
3301 | cqr = ERR_PTR(-EAGAIN); | |
3302 | goto out; | |
3303 | } | |
3304 | ||
3305 | idaws = (unsigned long *)(cqr->data + pfx_datasize); | |
3306 | ||
3307 | len_to_track_end = 0; | |
3308 | ||
3309 | rq_for_each_segment(bv, req, iter) { | |
3310 | dst = page_address(bv->bv_page) + bv->bv_offset; | |
3311 | seg_len = bv->bv_len; | |
3312 | if (!len_to_track_end) { | |
3313 | ccw[-1].flags |= CCW_FLAG_CC; | |
3314 | ccw->cmd_code = cmd; | |
3315 | /* maximum 3390 track size */ | |
3316 | ccw->count = 57326; | |
3317 | /* 64k map to one track */ | |
3318 | len_to_track_end = 65536; | |
3319 | ccw->cda = (__u32)(addr_t)idaws; | |
3320 | ccw->flags |= CCW_FLAG_IDA; | |
3321 | ccw->flags |= CCW_FLAG_SLI; | |
3322 | ccw++; | |
3323 | } | |
3324 | len_to_track_end -= seg_len; | |
3325 | idaws = idal_create_words(idaws, dst, seg_len); | |
3326 | } | |
3327 | ||
3328 | if (blk_noretry_request(req) || | |
3329 | block->base->features & DASD_FEATURE_FAILFAST) | |
3330 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); | |
3331 | cqr->startdev = startdev; | |
3332 | cqr->memdev = startdev; | |
3333 | cqr->block = block; | |
3334 | cqr->expires = startdev->default_expires * HZ; | |
3335 | cqr->lpm = startdev->path_data.ppm; | |
1f1ee9ad | 3336 | cqr->retries = startdev->default_retries; |
1aae0560 | 3337 | cqr->buildclk = get_tod_clock(); |
e4dbb0f2 SH |
3338 | cqr->status = DASD_CQR_FILLED; |
3339 | ||
3340 | if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN) | |
3341 | cqr = NULL; | |
3342 | out: | |
3343 | return cqr; | |
3344 | } | |
3345 | ||
3346 | ||
1da177e4 LT |
3347 | static int |
3348 | dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) | |
3349 | { | |
3350 | struct dasd_eckd_private *private; | |
3351 | struct ccw1 *ccw; | |
5705f702 | 3352 | struct req_iterator iter; |
1da177e4 LT |
3353 | struct bio_vec *bv; |
3354 | char *dst, *cda; | |
3355 | unsigned int blksize, blk_per_trk, off; | |
3356 | sector_t recid; | |
5705f702 | 3357 | int status; |
1da177e4 LT |
3358 | |
3359 | if (!dasd_page_cache) | |
3360 | goto out; | |
8e09f215 SW |
3361 | private = (struct dasd_eckd_private *) cqr->block->base->private; |
3362 | blksize = cqr->block->bp_block; | |
1da177e4 | 3363 | blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); |
83096ebf | 3364 | recid = blk_rq_pos(req) >> cqr->block->s2b_shift; |
1da177e4 LT |
3365 | ccw = cqr->cpaddr; |
3366 | /* Skip over define extent & locate record. */ | |
3367 | ccw++; | |
3368 | if (private->uses_cdl == 0 || recid > 2*blk_per_trk) | |
3369 | ccw++; | |
5705f702 | 3370 | rq_for_each_segment(bv, req, iter) { |
1da177e4 LT |
3371 | dst = page_address(bv->bv_page) + bv->bv_offset; |
3372 | for (off = 0; off < bv->bv_len; off += blksize) { | |
3373 | /* Skip locate record. */ | |
3374 | if (private->uses_cdl && recid <= 2*blk_per_trk) | |
3375 | ccw++; | |
3376 | if (dst) { | |
3377 | if (ccw->flags & CCW_FLAG_IDA) | |
3378 | cda = *((char **)((addr_t) ccw->cda)); | |
3379 | else | |
3380 | cda = (char *)((addr_t) ccw->cda); | |
3381 | if (dst != cda) { | |
3382 | if (rq_data_dir(req) == READ) | |
3383 | memcpy(dst, cda, bv->bv_len); | |
3384 | kmem_cache_free(dasd_page_cache, | |
3385 | (void *)((addr_t)cda & PAGE_MASK)); | |
3386 | } | |
3387 | dst = NULL; | |
3388 | } | |
3389 | ccw++; | |
3390 | recid++; | |
3391 | } | |
3392 | } | |
3393 | out: | |
3394 | status = cqr->status == DASD_CQR_DONE; | |
8e09f215 | 3395 | dasd_sfree_request(cqr, cqr->memdev); |
1da177e4 LT |
3396 | return status; |
3397 | } | |
3398 | ||
8e09f215 | 3399 | /* |
f3eb5384 | 3400 | * Modify ccw/tcw in cqr so it can be started on a base device. |
8e09f215 SW |
3401 | * |
3402 | * Note that this is not enough to restart the cqr! | |
3403 | * Either reset cqr->startdev as well (summary unit check handling) | |
3404 | * or restart via separate cqr (as in ERP handling). | |
3405 | */ | |
3406 | void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) | |
3407 | { | |
3408 | struct ccw1 *ccw; | |
3409 | struct PFX_eckd_data *pfxdata; | |
f3eb5384 SW |
3410 | struct tcw *tcw; |
3411 | struct tccb *tccb; | |
3412 | struct dcw *dcw; | |
3413 | ||
3414 | if (cqr->cpmode == 1) { | |
3415 | tcw = cqr->cpaddr; | |
3416 | tccb = tcw_get_tccb(tcw); | |
3417 | dcw = (struct dcw *)&tccb->tca[0]; | |
3418 | pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; | |
8e09f215 SW |
3419 | pfxdata->validity.verify_base = 0; |
3420 | pfxdata->validity.hyper_pav = 0; | |
f3eb5384 SW |
3421 | } else { |
3422 | ccw = cqr->cpaddr; | |
3423 | pfxdata = cqr->data; | |
3424 | if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { | |
3425 | pfxdata->validity.verify_base = 0; | |
3426 | pfxdata->validity.hyper_pav = 0; | |
3427 | } | |
8e09f215 SW |
3428 | } |
3429 | } | |
3430 | ||
3431 | #define DASD_ECKD_CHANQ_MAX_SIZE 4 | |
3432 | ||
3433 | static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, | |
3434 | struct dasd_block *block, | |
3435 | struct request *req) | |
3436 | { | |
3437 | struct dasd_eckd_private *private; | |
3438 | struct dasd_device *startdev; | |
3439 | unsigned long flags; | |
3440 | struct dasd_ccw_req *cqr; | |
3441 | ||
3442 | startdev = dasd_alias_get_start_dev(base); | |
3443 | if (!startdev) | |
3444 | startdev = base; | |
3445 | private = (struct dasd_eckd_private *) startdev->private; | |
3446 | if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) | |
3447 | return ERR_PTR(-EBUSY); | |
3448 | ||
3449 | spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); | |
3450 | private->count++; | |
e4dbb0f2 SH |
3451 | if ((base->features & DASD_FEATURE_USERAW)) |
3452 | cqr = dasd_raw_build_cp(startdev, block, req); | |
3453 | else | |
3454 | cqr = dasd_eckd_build_cp(startdev, block, req); | |
8e09f215 SW |
3455 | if (IS_ERR(cqr)) |
3456 | private->count--; | |
3457 | spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); | |
3458 | return cqr; | |
3459 | } | |
3460 | ||
3461 | static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, | |
3462 | struct request *req) | |
3463 | { | |
3464 | struct dasd_eckd_private *private; | |
3465 | unsigned long flags; | |
3466 | ||
3467 | spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); | |
3468 | private = (struct dasd_eckd_private *) cqr->memdev->private; | |
3469 | private->count--; | |
3470 | spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); | |
3471 | return dasd_eckd_free_cp(cqr, req); | |
3472 | } | |
3473 | ||
1da177e4 LT |
3474 | static int |
3475 | dasd_eckd_fill_info(struct dasd_device * device, | |
3476 | struct dasd_information2_t * info) | |
3477 | { | |
3478 | struct dasd_eckd_private *private; | |
3479 | ||
3480 | private = (struct dasd_eckd_private *) device->private; | |
3481 | info->label_block = 2; | |
3482 | info->FBA_layout = private->uses_cdl ? 0 : 1; | |
3483 | info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; | |
3484 | info->characteristics_size = sizeof(struct dasd_eckd_characteristics); | |
3485 | memcpy(info->characteristics, &private->rdc_data, | |
3486 | sizeof(struct dasd_eckd_characteristics)); | |
4abb08c2 SW |
3487 | info->confdata_size = min((unsigned long)private->conf_len, |
3488 | sizeof(info->configuration_data)); | |
3489 | memcpy(info->configuration_data, private->conf_data, | |
3490 | info->confdata_size); | |
1da177e4 LT |
3491 | return 0; |
3492 | } | |
3493 | ||
3494 | /* | |
3495 | * SECTION: ioctl functions for eckd devices. | |
3496 | */ | |
3497 | ||
3498 | /* | |
3499 | * Release device ioctl. | |
138c014d | 3500 | * Buils a channel programm to releases a prior reserved |
1da177e4 LT |
3501 | * (see dasd_eckd_reserve) device. |
3502 | */ | |
3503 | static int | |
1107ccfb | 3504 | dasd_eckd_release(struct dasd_device *device) |
1da177e4 | 3505 | { |
1da177e4 LT |
3506 | struct dasd_ccw_req *cqr; |
3507 | int rc; | |
f3eb5384 | 3508 | struct ccw1 *ccw; |
f932bcea | 3509 | int useglobal; |
1da177e4 LT |
3510 | |
3511 | if (!capable(CAP_SYS_ADMIN)) | |
3512 | return -EACCES; | |
3513 | ||
f932bcea | 3514 | useglobal = 0; |
68b781fe | 3515 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); |
1da177e4 | 3516 | if (IS_ERR(cqr)) { |
f932bcea SW |
3517 | mutex_lock(&dasd_reserve_mutex); |
3518 | useglobal = 1; | |
3519 | cqr = &dasd_reserve_req->cqr; | |
3520 | memset(cqr, 0, sizeof(*cqr)); | |
3521 | memset(&dasd_reserve_req->ccw, 0, | |
3522 | sizeof(dasd_reserve_req->ccw)); | |
3523 | cqr->cpaddr = &dasd_reserve_req->ccw; | |
3524 | cqr->data = &dasd_reserve_req->data; | |
3525 | cqr->magic = DASD_ECKD_MAGIC; | |
1da177e4 | 3526 | } |
f3eb5384 SW |
3527 | ccw = cqr->cpaddr; |
3528 | ccw->cmd_code = DASD_ECKD_CCW_RELEASE; | |
3529 | ccw->flags |= CCW_FLAG_SLI; | |
3530 | ccw->count = 32; | |
3531 | ccw->cda = (__u32)(addr_t) cqr->data; | |
8e09f215 SW |
3532 | cqr->startdev = device; |
3533 | cqr->memdev = device; | |
1da177e4 | 3534 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
1c01b8a5 | 3535 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
336c340b | 3536 | cqr->retries = 2; /* set retry counter to enable basic ERP */ |
1da177e4 | 3537 | cqr->expires = 2 * HZ; |
1aae0560 | 3538 | cqr->buildclk = get_tod_clock(); |
1da177e4 LT |
3539 | cqr->status = DASD_CQR_FILLED; |
3540 | ||
3541 | rc = dasd_sleep_on_immediatly(cqr); | |
5a27e60d SW |
3542 | if (!rc) |
3543 | clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); | |
1da177e4 | 3544 | |
f932bcea SW |
3545 | if (useglobal) |
3546 | mutex_unlock(&dasd_reserve_mutex); | |
3547 | else | |
3548 | dasd_sfree_request(cqr, cqr->memdev); | |
1da177e4 LT |
3549 | return rc; |
3550 | } | |
3551 | ||
3552 | /* | |
3553 | * Reserve device ioctl. | |
3554 | * Options are set to 'synchronous wait for interrupt' and | |
138c014d HH |
3555 | * 'timeout the request'. This leads to a terminate IO if |
3556 | * the interrupt is outstanding for a certain time. | |
1da177e4 LT |
3557 | */ |
3558 | static int | |
1107ccfb | 3559 | dasd_eckd_reserve(struct dasd_device *device) |
1da177e4 | 3560 | { |
1da177e4 LT |
3561 | struct dasd_ccw_req *cqr; |
3562 | int rc; | |
f3eb5384 | 3563 | struct ccw1 *ccw; |
f932bcea | 3564 | int useglobal; |
1da177e4 LT |
3565 | |
3566 | if (!capable(CAP_SYS_ADMIN)) | |
3567 | return -EACCES; | |
3568 | ||
f932bcea | 3569 | useglobal = 0; |
68b781fe | 3570 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); |
1da177e4 | 3571 | if (IS_ERR(cqr)) { |
f932bcea SW |
3572 | mutex_lock(&dasd_reserve_mutex); |
3573 | useglobal = 1; | |
3574 | cqr = &dasd_reserve_req->cqr; | |
3575 | memset(cqr, 0, sizeof(*cqr)); | |
3576 | memset(&dasd_reserve_req->ccw, 0, | |
3577 | sizeof(dasd_reserve_req->ccw)); | |
3578 | cqr->cpaddr = &dasd_reserve_req->ccw; | |
3579 | cqr->data = &dasd_reserve_req->data; | |
3580 | cqr->magic = DASD_ECKD_MAGIC; | |
1da177e4 | 3581 | } |
f3eb5384 SW |
3582 | ccw = cqr->cpaddr; |
3583 | ccw->cmd_code = DASD_ECKD_CCW_RESERVE; | |
3584 | ccw->flags |= CCW_FLAG_SLI; | |
3585 | ccw->count = 32; | |
3586 | ccw->cda = (__u32)(addr_t) cqr->data; | |
8e09f215 SW |
3587 | cqr->startdev = device; |
3588 | cqr->memdev = device; | |
1da177e4 | 3589 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
1c01b8a5 | 3590 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
336c340b | 3591 | cqr->retries = 2; /* set retry counter to enable basic ERP */ |
1da177e4 | 3592 | cqr->expires = 2 * HZ; |
1aae0560 | 3593 | cqr->buildclk = get_tod_clock(); |
1da177e4 LT |
3594 | cqr->status = DASD_CQR_FILLED; |
3595 | ||
3596 | rc = dasd_sleep_on_immediatly(cqr); | |
5a27e60d SW |
3597 | if (!rc) |
3598 | set_bit(DASD_FLAG_IS_RESERVED, &device->flags); | |
1da177e4 | 3599 | |
f932bcea SW |
3600 | if (useglobal) |
3601 | mutex_unlock(&dasd_reserve_mutex); | |
3602 | else | |
3603 | dasd_sfree_request(cqr, cqr->memdev); | |
1da177e4 LT |
3604 | return rc; |
3605 | } | |
3606 | ||
3607 | /* | |
3608 | * Steal lock ioctl - unconditional reserve device. | |
138c014d | 3609 | * Buils a channel programm to break a device's reservation. |
1da177e4 LT |
3610 | * (unconditional reserve) |
3611 | */ | |
3612 | static int | |
1107ccfb | 3613 | dasd_eckd_steal_lock(struct dasd_device *device) |
1da177e4 | 3614 | { |
1da177e4 LT |
3615 | struct dasd_ccw_req *cqr; |
3616 | int rc; | |
f3eb5384 | 3617 | struct ccw1 *ccw; |
f932bcea | 3618 | int useglobal; |
1da177e4 LT |
3619 | |
3620 | if (!capable(CAP_SYS_ADMIN)) | |
3621 | return -EACCES; | |
3622 | ||
f932bcea | 3623 | useglobal = 0; |
68b781fe | 3624 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); |
1da177e4 | 3625 | if (IS_ERR(cqr)) { |
f932bcea SW |
3626 | mutex_lock(&dasd_reserve_mutex); |
3627 | useglobal = 1; | |
3628 | cqr = &dasd_reserve_req->cqr; | |
3629 | memset(cqr, 0, sizeof(*cqr)); | |
3630 | memset(&dasd_reserve_req->ccw, 0, | |
3631 | sizeof(dasd_reserve_req->ccw)); | |
3632 | cqr->cpaddr = &dasd_reserve_req->ccw; | |
3633 | cqr->data = &dasd_reserve_req->data; | |
3634 | cqr->magic = DASD_ECKD_MAGIC; | |
1da177e4 | 3635 | } |
f3eb5384 SW |
3636 | ccw = cqr->cpaddr; |
3637 | ccw->cmd_code = DASD_ECKD_CCW_SLCK; | |
3638 | ccw->flags |= CCW_FLAG_SLI; | |
3639 | ccw->count = 32; | |
3640 | ccw->cda = (__u32)(addr_t) cqr->data; | |
8e09f215 SW |
3641 | cqr->startdev = device; |
3642 | cqr->memdev = device; | |
1da177e4 | 3643 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
1c01b8a5 | 3644 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
336c340b | 3645 | cqr->retries = 2; /* set retry counter to enable basic ERP */ |
1da177e4 | 3646 | cqr->expires = 2 * HZ; |
1aae0560 | 3647 | cqr->buildclk = get_tod_clock(); |
1da177e4 LT |
3648 | cqr->status = DASD_CQR_FILLED; |
3649 | ||
3650 | rc = dasd_sleep_on_immediatly(cqr); | |
5a27e60d SW |
3651 | if (!rc) |
3652 | set_bit(DASD_FLAG_IS_RESERVED, &device->flags); | |
1da177e4 | 3653 | |
f932bcea SW |
3654 | if (useglobal) |
3655 | mutex_unlock(&dasd_reserve_mutex); | |
3656 | else | |
3657 | dasd_sfree_request(cqr, cqr->memdev); | |
1da177e4 LT |
3658 | return rc; |
3659 | } | |
3660 | ||
196339f1 SW |
3661 | /* |
3662 | * SNID - Sense Path Group ID | |
3663 | * This ioctl may be used in situations where I/O is stalled due to | |
3664 | * a reserve, so if the normal dasd_smalloc_request fails, we use the | |
3665 | * preallocated dasd_reserve_req. | |
3666 | */ | |
3667 | static int dasd_eckd_snid(struct dasd_device *device, | |
3668 | void __user *argp) | |
3669 | { | |
3670 | struct dasd_ccw_req *cqr; | |
3671 | int rc; | |
3672 | struct ccw1 *ccw; | |
3673 | int useglobal; | |
3674 | struct dasd_snid_ioctl_data usrparm; | |
3675 | ||
3676 | if (!capable(CAP_SYS_ADMIN)) | |
3677 | return -EACCES; | |
3678 | ||
3679 | if (copy_from_user(&usrparm, argp, sizeof(usrparm))) | |
3680 | return -EFAULT; | |
3681 | ||
3682 | useglobal = 0; | |
3683 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, | |
3684 | sizeof(struct dasd_snid_data), device); | |
3685 | if (IS_ERR(cqr)) { | |
3686 | mutex_lock(&dasd_reserve_mutex); | |
3687 | useglobal = 1; | |
3688 | cqr = &dasd_reserve_req->cqr; | |
3689 | memset(cqr, 0, sizeof(*cqr)); | |
3690 | memset(&dasd_reserve_req->ccw, 0, | |
3691 | sizeof(dasd_reserve_req->ccw)); | |
3692 | cqr->cpaddr = &dasd_reserve_req->ccw; | |
3693 | cqr->data = &dasd_reserve_req->data; | |
3694 | cqr->magic = DASD_ECKD_MAGIC; | |
3695 | } | |
3696 | ccw = cqr->cpaddr; | |
3697 | ccw->cmd_code = DASD_ECKD_CCW_SNID; | |
3698 | ccw->flags |= CCW_FLAG_SLI; | |
3699 | ccw->count = 12; | |
3700 | ccw->cda = (__u32)(addr_t) cqr->data; | |
3701 | cqr->startdev = device; | |
3702 | cqr->memdev = device; | |
3703 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); | |
3704 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); | |
5a27e60d | 3705 | set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); |
196339f1 SW |
3706 | cqr->retries = 5; |
3707 | cqr->expires = 10 * HZ; | |
1aae0560 | 3708 | cqr->buildclk = get_tod_clock(); |
196339f1 SW |
3709 | cqr->status = DASD_CQR_FILLED; |
3710 | cqr->lpm = usrparm.path_mask; | |
3711 | ||
3712 | rc = dasd_sleep_on_immediatly(cqr); | |
3713 | /* verify that I/O processing didn't modify the path mask */ | |
3714 | if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) | |
3715 | rc = -EIO; | |
3716 | if (!rc) { | |
3717 | usrparm.data = *((struct dasd_snid_data *)cqr->data); | |
3718 | if (copy_to_user(argp, &usrparm, sizeof(usrparm))) | |
3719 | rc = -EFAULT; | |
3720 | } | |
3721 | ||
3722 | if (useglobal) | |
3723 | mutex_unlock(&dasd_reserve_mutex); | |
3724 | else | |
3725 | dasd_sfree_request(cqr, cqr->memdev); | |
3726 | return rc; | |
3727 | } | |
3728 | ||
1da177e4 LT |
3729 | /* |
3730 | * Read performance statistics | |
3731 | */ | |
3732 | static int | |
1107ccfb | 3733 | dasd_eckd_performance(struct dasd_device *device, void __user *argp) |
1da177e4 | 3734 | { |
1da177e4 LT |
3735 | struct dasd_psf_prssd_data *prssdp; |
3736 | struct dasd_rssd_perf_stats_t *stats; | |
3737 | struct dasd_ccw_req *cqr; | |
3738 | struct ccw1 *ccw; | |
3739 | int rc; | |
3740 | ||
68b781fe | 3741 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, |
8e09f215 SW |
3742 | (sizeof(struct dasd_psf_prssd_data) + |
3743 | sizeof(struct dasd_rssd_perf_stats_t)), | |
1da177e4 LT |
3744 | device); |
3745 | if (IS_ERR(cqr)) { | |
fc19f381 | 3746 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
1da177e4 LT |
3747 | "Could not allocate initialization request"); |
3748 | return PTR_ERR(cqr); | |
3749 | } | |
8e09f215 SW |
3750 | cqr->startdev = device; |
3751 | cqr->memdev = device; | |
1da177e4 | 3752 | cqr->retries = 0; |
eb6e199b | 3753 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
1da177e4 LT |
3754 | cqr->expires = 10 * HZ; |
3755 | ||
3756 | /* Prepare for Read Subsystem Data */ | |
3757 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
8e09f215 | 3758 | memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); |
1da177e4 | 3759 | prssdp->order = PSF_ORDER_PRSSD; |
5d67d164 | 3760 | prssdp->suborder = 0x01; /* Performance Statistics */ |
1da177e4 LT |
3761 | prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ |
3762 | ||
3763 | ccw = cqr->cpaddr; | |
3764 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
8e09f215 | 3765 | ccw->count = sizeof(struct dasd_psf_prssd_data); |
1da177e4 LT |
3766 | ccw->flags |= CCW_FLAG_CC; |
3767 | ccw->cda = (__u32)(addr_t) prssdp; | |
3768 | ||
3769 | /* Read Subsystem Data - Performance Statistics */ | |
3770 | stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); | |
8e09f215 | 3771 | memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); |
1da177e4 LT |
3772 | |
3773 | ccw++; | |
3774 | ccw->cmd_code = DASD_ECKD_CCW_RSSD; | |
8e09f215 | 3775 | ccw->count = sizeof(struct dasd_rssd_perf_stats_t); |
1da177e4 LT |
3776 | ccw->cda = (__u32)(addr_t) stats; |
3777 | ||
1aae0560 | 3778 | cqr->buildclk = get_tod_clock(); |
1da177e4 LT |
3779 | cqr->status = DASD_CQR_FILLED; |
3780 | rc = dasd_sleep_on(cqr); | |
3781 | if (rc == 0) { | |
1da177e4 LT |
3782 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; |
3783 | stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); | |
1107ccfb CH |
3784 | if (copy_to_user(argp, stats, |
3785 | sizeof(struct dasd_rssd_perf_stats_t))) | |
3786 | rc = -EFAULT; | |
1da177e4 | 3787 | } |
8e09f215 | 3788 | dasd_sfree_request(cqr, cqr->memdev); |
1da177e4 LT |
3789 | return rc; |
3790 | } | |
3791 | ||
3792 | /* | |
3793 | * Get attributes (cache operations) | |
3794 | * Returnes the cache attributes used in Define Extend (DE). | |
3795 | */ | |
3796 | static int | |
1107ccfb | 3797 | dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) |
1da177e4 | 3798 | { |
1107ccfb CH |
3799 | struct dasd_eckd_private *private = |
3800 | (struct dasd_eckd_private *)device->private; | |
3801 | struct attrib_data_t attrib = private->attrib; | |
1da177e4 LT |
3802 | int rc; |
3803 | ||
3804 | if (!capable(CAP_SYS_ADMIN)) | |
3805 | return -EACCES; | |
1107ccfb | 3806 | if (!argp) |
1da177e4 LT |
3807 | return -EINVAL; |
3808 | ||
1107ccfb CH |
3809 | rc = 0; |
3810 | if (copy_to_user(argp, (long *) &attrib, | |
8e09f215 | 3811 | sizeof(struct attrib_data_t))) |
1107ccfb | 3812 | rc = -EFAULT; |
1da177e4 LT |
3813 | |
3814 | return rc; | |
3815 | } | |
3816 | ||
3817 | /* | |
3818 | * Set attributes (cache operations) | |
3819 | * Stores the attributes for cache operation to be used in Define Extend (DE). | |
3820 | */ | |
3821 | static int | |
1107ccfb | 3822 | dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) |
1da177e4 | 3823 | { |
1107ccfb CH |
3824 | struct dasd_eckd_private *private = |
3825 | (struct dasd_eckd_private *)device->private; | |
1da177e4 LT |
3826 | struct attrib_data_t attrib; |
3827 | ||
3828 | if (!capable(CAP_SYS_ADMIN)) | |
3829 | return -EACCES; | |
1107ccfb | 3830 | if (!argp) |
1da177e4 LT |
3831 | return -EINVAL; |
3832 | ||
1107ccfb | 3833 | if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) |
1da177e4 | 3834 | return -EFAULT; |
1da177e4 LT |
3835 | private->attrib = attrib; |
3836 | ||
fc19f381 SH |
3837 | dev_info(&device->cdev->dev, |
3838 | "The DASD cache mode was set to %x (%i cylinder prestage)\n", | |
3839 | private->attrib.operation, private->attrib.nr_cyl); | |
1da177e4 LT |
3840 | return 0; |
3841 | } | |
3842 | ||
ab1d848f NH |
3843 | /* |
3844 | * Issue syscall I/O to EMC Symmetrix array. | |
3845 | * CCWs are PSF and RSSD | |
3846 | */ | |
3847 | static int dasd_symm_io(struct dasd_device *device, void __user *argp) | |
3848 | { | |
3849 | struct dasd_symmio_parms usrparm; | |
3850 | char *psf_data, *rssd_result; | |
3851 | struct dasd_ccw_req *cqr; | |
3852 | struct ccw1 *ccw; | |
52898025 | 3853 | char psf0, psf1; |
ab1d848f NH |
3854 | int rc; |
3855 | ||
52898025 NH |
3856 | if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) |
3857 | return -EACCES; | |
3858 | psf0 = psf1 = 0; | |
3859 | ||
ab1d848f NH |
3860 | /* Copy parms from caller */ |
3861 | rc = -EFAULT; | |
3862 | if (copy_from_user(&usrparm, argp, sizeof(usrparm))) | |
3863 | goto out; | |
f8b06859 HC |
3864 | if (is_compat_task() || sizeof(long) == 4) { |
3865 | /* Make sure pointers are sane even on 31 bit. */ | |
ab1d848f | 3866 | rc = -EINVAL; |
f8b06859 HC |
3867 | if ((usrparm.psf_data >> 32) != 0) |
3868 | goto out; | |
3869 | if ((usrparm.rssd_result >> 32) != 0) | |
3870 | goto out; | |
3871 | usrparm.psf_data &= 0x7fffffffULL; | |
3872 | usrparm.rssd_result &= 0x7fffffffULL; | |
ab1d848f | 3873 | } |
ab1d848f NH |
3874 | /* alloc I/O data area */ |
3875 | psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); | |
3876 | rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); | |
3877 | if (!psf_data || !rssd_result) { | |
3878 | rc = -ENOMEM; | |
3879 | goto out_free; | |
3880 | } | |
3881 | ||
3882 | /* get syscall header from user space */ | |
3883 | rc = -EFAULT; | |
3884 | if (copy_from_user(psf_data, | |
3885 | (void __user *)(unsigned long) usrparm.psf_data, | |
3886 | usrparm.psf_data_len)) | |
3887 | goto out_free; | |
52898025 NH |
3888 | psf0 = psf_data[0]; |
3889 | psf1 = psf_data[1]; | |
ab1d848f NH |
3890 | |
3891 | /* setup CCWs for PSF + RSSD */ | |
68b781fe | 3892 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device); |
ab1d848f | 3893 | if (IS_ERR(cqr)) { |
fc19f381 | 3894 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
ab1d848f NH |
3895 | "Could not allocate initialization request"); |
3896 | rc = PTR_ERR(cqr); | |
3897 | goto out_free; | |
3898 | } | |
3899 | ||
3900 | cqr->startdev = device; | |
3901 | cqr->memdev = device; | |
3902 | cqr->retries = 3; | |
3903 | cqr->expires = 10 * HZ; | |
1aae0560 | 3904 | cqr->buildclk = get_tod_clock(); |
ab1d848f NH |
3905 | cqr->status = DASD_CQR_FILLED; |
3906 | ||
3907 | /* Build the ccws */ | |
3908 | ccw = cqr->cpaddr; | |
3909 | ||
3910 | /* PSF ccw */ | |
3911 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
3912 | ccw->count = usrparm.psf_data_len; | |
3913 | ccw->flags |= CCW_FLAG_CC; | |
3914 | ccw->cda = (__u32)(addr_t) psf_data; | |
3915 | ||
3916 | ccw++; | |
3917 | ||
3918 | /* RSSD ccw */ | |
3919 | ccw->cmd_code = DASD_ECKD_CCW_RSSD; | |
3920 | ccw->count = usrparm.rssd_result_len; | |
3921 | ccw->flags = CCW_FLAG_SLI ; | |
3922 | ccw->cda = (__u32)(addr_t) rssd_result; | |
3923 | ||
3924 | rc = dasd_sleep_on(cqr); | |
3925 | if (rc) | |
3926 | goto out_sfree; | |
3927 | ||
3928 | rc = -EFAULT; | |
3929 | if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, | |
3930 | rssd_result, usrparm.rssd_result_len)) | |
3931 | goto out_sfree; | |
3932 | rc = 0; | |
3933 | ||
3934 | out_sfree: | |
3935 | dasd_sfree_request(cqr, cqr->memdev); | |
3936 | out_free: | |
3937 | kfree(rssd_result); | |
3938 | kfree(psf_data); | |
3939 | out: | |
52898025 NH |
3940 | DBF_DEV_EVENT(DBF_WARNING, device, |
3941 | "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", | |
3942 | (int) psf0, (int) psf1, rc); | |
ab1d848f NH |
3943 | return rc; |
3944 | } | |
3945 | ||
1107ccfb | 3946 | static int |
8e09f215 | 3947 | dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) |
1107ccfb | 3948 | { |
8e09f215 SW |
3949 | struct dasd_device *device = block->base; |
3950 | ||
1107ccfb CH |
3951 | switch (cmd) { |
3952 | case BIODASDGATTR: | |
3953 | return dasd_eckd_get_attrib(device, argp); | |
3954 | case BIODASDSATTR: | |
3955 | return dasd_eckd_set_attrib(device, argp); | |
3956 | case BIODASDPSRD: | |
3957 | return dasd_eckd_performance(device, argp); | |
3958 | case BIODASDRLSE: | |
3959 | return dasd_eckd_release(device); | |
3960 | case BIODASDRSRV: | |
3961 | return dasd_eckd_reserve(device); | |
3962 | case BIODASDSLCK: | |
3963 | return dasd_eckd_steal_lock(device); | |
196339f1 SW |
3964 | case BIODASDSNID: |
3965 | return dasd_eckd_snid(device, argp); | |
ab1d848f NH |
3966 | case BIODASDSYMMIO: |
3967 | return dasd_symm_io(device, argp); | |
1107ccfb | 3968 | default: |
6b79d14e | 3969 | return -ENOTTY; |
1107ccfb CH |
3970 | } |
3971 | } | |
3972 | ||
445b5b49 HH |
3973 | /* |
3974 | * Dump the range of CCWs into 'page' buffer | |
3975 | * and return number of printed chars. | |
3976 | */ | |
4d284cac | 3977 | static int |
445b5b49 HH |
3978 | dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) |
3979 | { | |
3980 | int len, count; | |
3981 | char *datap; | |
3982 | ||
3983 | len = 0; | |
3984 | while (from <= to) { | |
773bab4a | 3985 | len += sprintf(page + len, PRINTK_HEADER |
445b5b49 HH |
3986 | " CCW %p: %08X %08X DAT:", |
3987 | from, ((int *) from)[0], ((int *) from)[1]); | |
3988 | ||
3989 | /* get pointer to data (consider IDALs) */ | |
3990 | if (from->flags & CCW_FLAG_IDA) | |
3991 | datap = (char *) *((addr_t *) (addr_t) from->cda); | |
3992 | else | |
3993 | datap = (char *) ((addr_t) from->cda); | |
3994 | ||
3995 | /* dump data (max 32 bytes) */ | |
3996 | for (count = 0; count < from->count && count < 32; count++) { | |
3997 | if (count % 8 == 0) len += sprintf(page + len, " "); | |
3998 | if (count % 4 == 0) len += sprintf(page + len, " "); | |
3999 | len += sprintf(page + len, "%02x", datap[count]); | |
4000 | } | |
4001 | len += sprintf(page + len, "\n"); | |
4002 | from++; | |
4003 | } | |
4004 | return len; | |
4005 | } | |
4006 | ||
fc19f381 | 4007 | static void |
aeec92ca SH |
4008 | dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, |
4009 | char *reason) | |
fc19f381 SH |
4010 | { |
4011 | u64 *sense; | |
a5a0061f | 4012 | u64 *stat; |
aeec92ca SH |
4013 | |
4014 | sense = (u64 *) dasd_get_sense(irb); | |
a5a0061f | 4015 | stat = (u64 *) &irb->scsw; |
fc19f381 | 4016 | if (sense) { |
a5a0061f SW |
4017 | DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " |
4018 | "%016llx %016llx %016llx %016llx", | |
4019 | reason, *stat, *((u32 *) (stat + 1)), | |
ed3640b2 | 4020 | sense[0], sense[1], sense[2], sense[3]); |
fc19f381 | 4021 | } else { |
a5a0061f SW |
4022 | DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", |
4023 | reason, *stat, *((u32 *) (stat + 1)), | |
4024 | "NO VALID SENSE"); | |
fc19f381 SH |
4025 | } |
4026 | } | |
4027 | ||
1da177e4 LT |
4028 | /* |
4029 | * Print sense data and related channel program. | |
4030 | * Parts are printed because printk buffer is only 1024 bytes. | |
4031 | */ | |
f3eb5384 | 4032 | static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, |
8e09f215 | 4033 | struct dasd_ccw_req *req, struct irb *irb) |
1da177e4 LT |
4034 | { |
4035 | char *page; | |
445b5b49 HH |
4036 | struct ccw1 *first, *last, *fail, *from, *to; |
4037 | int len, sl, sct; | |
1da177e4 LT |
4038 | |
4039 | page = (char *) get_zeroed_page(GFP_ATOMIC); | |
4040 | if (page == NULL) { | |
fc19f381 SH |
4041 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
4042 | "No memory to dump sense data\n"); | |
1da177e4 LT |
4043 | return; |
4044 | } | |
445b5b49 | 4045 | /* dump the sense data */ |
773bab4a | 4046 | len = sprintf(page, PRINTK_HEADER |
1da177e4 | 4047 | " I/O status report for device %s:\n", |
2a0217d5 | 4048 | dev_name(&device->cdev->dev)); |
773bab4a | 4049 | len += sprintf(page + len, PRINTK_HEADER |
a5a0061f SW |
4050 | " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " |
4051 | "CS:%02X RC:%d\n", | |
4052 | req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), | |
4053 | scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), | |
4054 | scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), | |
4055 | req ? req->intrc : 0); | |
773bab4a | 4056 | len += sprintf(page + len, PRINTK_HEADER |
1da177e4 | 4057 | " device %s: Failing CCW: %p\n", |
2a0217d5 | 4058 | dev_name(&device->cdev->dev), |
23d805b6 | 4059 | (void *) (addr_t) irb->scsw.cmd.cpa); |
1da177e4 LT |
4060 | if (irb->esw.esw0.erw.cons) { |
4061 | for (sl = 0; sl < 4; sl++) { | |
773bab4a | 4062 | len += sprintf(page + len, PRINTK_HEADER |
1da177e4 LT |
4063 | " Sense(hex) %2d-%2d:", |
4064 | (8 * sl), ((8 * sl) + 7)); | |
4065 | ||
4066 | for (sct = 0; sct < 8; sct++) { | |
4067 | len += sprintf(page + len, " %02x", | |
4068 | irb->ecw[8 * sl + sct]); | |
4069 | } | |
4070 | len += sprintf(page + len, "\n"); | |
4071 | } | |
4072 | ||
4073 | if (irb->ecw[27] & DASD_SENSE_BIT_0) { | |
4074 | /* 24 Byte Sense Data */ | |
773bab4a | 4075 | sprintf(page + len, PRINTK_HEADER |
445b5b49 HH |
4076 | " 24 Byte: %x MSG %x, " |
4077 | "%s MSGb to SYSOP\n", | |
4078 | irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, | |
4079 | irb->ecw[1] & 0x10 ? "" : "no"); | |
1da177e4 LT |
4080 | } else { |
4081 | /* 32 Byte Sense Data */ | |
773bab4a | 4082 | sprintf(page + len, PRINTK_HEADER |
445b5b49 HH |
4083 | " 32 Byte: Format: %x " |
4084 | "Exception class %x\n", | |
4085 | irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); | |
1da177e4 LT |
4086 | } |
4087 | } else { | |
773bab4a | 4088 | sprintf(page + len, PRINTK_HEADER |
445b5b49 | 4089 | " SORRY - NO VALID SENSE AVAILABLE\n"); |
1da177e4 | 4090 | } |
773bab4a | 4091 | printk(KERN_ERR "%s", page); |
445b5b49 | 4092 | |
8e09f215 SW |
4093 | if (req) { |
4094 | /* req == NULL for unsolicited interrupts */ | |
4095 | /* dump the Channel Program (max 140 Bytes per line) */ | |
4096 | /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ | |
4097 | first = req->cpaddr; | |
4098 | for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); | |
4099 | to = min(first + 6, last); | |
773bab4a | 4100 | len = sprintf(page, PRINTK_HEADER |
8e09f215 SW |
4101 | " Related CP in req: %p\n", req); |
4102 | dasd_eckd_dump_ccw_range(first, to, page + len); | |
773bab4a | 4103 | printk(KERN_ERR "%s", page); |
1da177e4 | 4104 | |
8e09f215 SW |
4105 | /* print failing CCW area (maximum 4) */ |
4106 | /* scsw->cda is either valid or zero */ | |
4107 | len = 0; | |
4108 | from = ++to; | |
23d805b6 PO |
4109 | fail = (struct ccw1 *)(addr_t) |
4110 | irb->scsw.cmd.cpa; /* failing CCW */ | |
8e09f215 SW |
4111 | if (from < fail - 2) { |
4112 | from = fail - 2; /* there is a gap - print header */ | |
773bab4a | 4113 | len += sprintf(page, PRINTK_HEADER "......\n"); |
8e09f215 SW |
4114 | } |
4115 | to = min(fail + 1, last); | |
4116 | len += dasd_eckd_dump_ccw_range(from, to, page + len); | |
4117 | ||
4118 | /* print last CCWs (maximum 2) */ | |
4119 | from = max(from, ++to); | |
4120 | if (from < last - 1) { | |
4121 | from = last - 1; /* there is a gap - print header */ | |
773bab4a | 4122 | len += sprintf(page + len, PRINTK_HEADER "......\n"); |
8e09f215 SW |
4123 | } |
4124 | len += dasd_eckd_dump_ccw_range(from, last, page + len); | |
4125 | if (len > 0) | |
773bab4a | 4126 | printk(KERN_ERR "%s", page); |
1da177e4 | 4127 | } |
1da177e4 LT |
4128 | free_page((unsigned long) page); |
4129 | } | |
4130 | ||
f3eb5384 SW |
4131 | |
4132 | /* | |
4133 | * Print sense data from a tcw. | |
4134 | */ | |
4135 | static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, | |
4136 | struct dasd_ccw_req *req, struct irb *irb) | |
4137 | { | |
4138 | char *page; | |
4139 | int len, sl, sct, residual; | |
f3eb5384 | 4140 | struct tsb *tsb; |
ef19298b | 4141 | u8 *sense, *rcq; |
f3eb5384 SW |
4142 | |
4143 | page = (char *) get_zeroed_page(GFP_ATOMIC); | |
4144 | if (page == NULL) { | |
fc19f381 | 4145 | DBF_DEV_EVENT(DBF_WARNING, device, " %s", |
f3eb5384 SW |
4146 | "No memory to dump sense data"); |
4147 | return; | |
4148 | } | |
4149 | /* dump the sense data */ | |
773bab4a | 4150 | len = sprintf(page, PRINTK_HEADER |
f3eb5384 SW |
4151 | " I/O status report for device %s:\n", |
4152 | dev_name(&device->cdev->dev)); | |
773bab4a | 4153 | len += sprintf(page + len, PRINTK_HEADER |
a5a0061f SW |
4154 | " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " |
4155 | "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", | |
4156 | req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), | |
4157 | scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), | |
4158 | scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), | |
4159 | irb->scsw.tm.fcxs, irb->scsw.tm.schxs, | |
4160 | req ? req->intrc : 0); | |
773bab4a | 4161 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4162 | " device %s: Failing TCW: %p\n", |
4163 | dev_name(&device->cdev->dev), | |
4164 | (void *) (addr_t) irb->scsw.tm.tcw); | |
4165 | ||
4166 | tsb = NULL; | |
4167 | sense = NULL; | |
a5a0061f | 4168 | if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) |
f3eb5384 SW |
4169 | tsb = tcw_get_tsb( |
4170 | (struct tcw *)(unsigned long)irb->scsw.tm.tcw); | |
4171 | ||
b8fde722 | 4172 | if (tsb) { |
773bab4a | 4173 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 | 4174 | " tsb->length %d\n", tsb->length); |
773bab4a | 4175 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 | 4176 | " tsb->flags %x\n", tsb->flags); |
773bab4a | 4177 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 | 4178 | " tsb->dcw_offset %d\n", tsb->dcw_offset); |
773bab4a | 4179 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4180 | " tsb->count %d\n", tsb->count); |
4181 | residual = tsb->count - 28; | |
773bab4a | 4182 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4183 | " residual %d\n", residual); |
4184 | ||
4185 | switch (tsb->flags & 0x07) { | |
4186 | case 1: /* tsa_iostat */ | |
773bab4a | 4187 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4188 | " tsb->tsa.iostat.dev_time %d\n", |
4189 | tsb->tsa.iostat.dev_time); | |
773bab4a | 4190 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4191 | " tsb->tsa.iostat.def_time %d\n", |
4192 | tsb->tsa.iostat.def_time); | |
773bab4a | 4193 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4194 | " tsb->tsa.iostat.queue_time %d\n", |
4195 | tsb->tsa.iostat.queue_time); | |
773bab4a | 4196 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4197 | " tsb->tsa.iostat.dev_busy_time %d\n", |
4198 | tsb->tsa.iostat.dev_busy_time); | |
773bab4a | 4199 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4200 | " tsb->tsa.iostat.dev_act_time %d\n", |
4201 | tsb->tsa.iostat.dev_act_time); | |
4202 | sense = tsb->tsa.iostat.sense; | |
4203 | break; | |
4204 | case 2: /* ts_ddpc */ | |
773bab4a | 4205 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 | 4206 | " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); |
ef19298b | 4207 | for (sl = 0; sl < 2; sl++) { |
773bab4a | 4208 | len += sprintf(page + len, PRINTK_HEADER |
ef19298b SW |
4209 | " tsb->tsa.ddpc.rcq %2d-%2d: ", |
4210 | (8 * sl), ((8 * sl) + 7)); | |
4211 | rcq = tsb->tsa.ddpc.rcq; | |
f3eb5384 SW |
4212 | for (sct = 0; sct < 8; sct++) { |
4213 | len += sprintf(page + len, " %02x", | |
ef19298b | 4214 | rcq[8 * sl + sct]); |
f3eb5384 SW |
4215 | } |
4216 | len += sprintf(page + len, "\n"); | |
4217 | } | |
4218 | sense = tsb->tsa.ddpc.sense; | |
4219 | break; | |
4220 | case 3: /* tsa_intrg */ | |
773bab4a SO |
4221 | len += sprintf(page + len, PRINTK_HEADER |
4222 | " tsb->tsa.intrg.: not supportet yet\n"); | |
f3eb5384 SW |
4223 | break; |
4224 | } | |
4225 | ||
4226 | if (sense) { | |
4227 | for (sl = 0; sl < 4; sl++) { | |
773bab4a | 4228 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4229 | " Sense(hex) %2d-%2d:", |
4230 | (8 * sl), ((8 * sl) + 7)); | |
4231 | for (sct = 0; sct < 8; sct++) { | |
4232 | len += sprintf(page + len, " %02x", | |
4233 | sense[8 * sl + sct]); | |
4234 | } | |
4235 | len += sprintf(page + len, "\n"); | |
4236 | } | |
4237 | ||
4238 | if (sense[27] & DASD_SENSE_BIT_0) { | |
4239 | /* 24 Byte Sense Data */ | |
773bab4a | 4240 | sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4241 | " 24 Byte: %x MSG %x, " |
4242 | "%s MSGb to SYSOP\n", | |
4243 | sense[7] >> 4, sense[7] & 0x0f, | |
4244 | sense[1] & 0x10 ? "" : "no"); | |
4245 | } else { | |
4246 | /* 32 Byte Sense Data */ | |
773bab4a | 4247 | sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4248 | " 32 Byte: Format: %x " |
4249 | "Exception class %x\n", | |
4250 | sense[6] & 0x0f, sense[22] >> 4); | |
4251 | } | |
4252 | } else { | |
773bab4a | 4253 | sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4254 | " SORRY - NO VALID SENSE AVAILABLE\n"); |
4255 | } | |
4256 | } else { | |
773bab4a | 4257 | sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4258 | " SORRY - NO TSB DATA AVAILABLE\n"); |
4259 | } | |
773bab4a | 4260 | printk(KERN_ERR "%s", page); |
f3eb5384 SW |
4261 | free_page((unsigned long) page); |
4262 | } | |
4263 | ||
4264 | static void dasd_eckd_dump_sense(struct dasd_device *device, | |
4265 | struct dasd_ccw_req *req, struct irb *irb) | |
4266 | { | |
a5a0061f | 4267 | if (scsw_is_tm(&irb->scsw)) |
f3eb5384 SW |
4268 | dasd_eckd_dump_sense_tcw(device, req, irb); |
4269 | else | |
4270 | dasd_eckd_dump_sense_ccw(device, req, irb); | |
4271 | } | |
4272 | ||
501183f2 | 4273 | static int dasd_eckd_pm_freeze(struct dasd_device *device) |
d41dd122 SH |
4274 | { |
4275 | /* | |
4276 | * the device should be disconnected from our LCU structure | |
4277 | * on restore we will reconnect it and reread LCU specific | |
4278 | * information like PAV support that might have changed | |
4279 | */ | |
4280 | dasd_alias_remove_device(device); | |
4281 | dasd_alias_disconnect_device_from_lcu(device); | |
4282 | ||
4283 | return 0; | |
4284 | } | |
4285 | ||
501183f2 | 4286 | static int dasd_eckd_restore_device(struct dasd_device *device) |
d41dd122 SH |
4287 | { |
4288 | struct dasd_eckd_private *private; | |
6fca97a9 | 4289 | struct dasd_eckd_characteristics temp_rdc_data; |
f9f8d02f | 4290 | int rc; |
d41dd122 | 4291 | struct dasd_uid temp_uid; |
a7602f6c | 4292 | unsigned long flags; |
ea4da6ea | 4293 | unsigned long cqr_flags = 0; |
d41dd122 | 4294 | |
d41dd122 SH |
4295 | private = (struct dasd_eckd_private *) device->private; |
4296 | ||
4297 | /* Read Configuration Data */ | |
55d3a85c | 4298 | dasd_eckd_read_conf(device); |
d41dd122 | 4299 | |
2dedf0d9 SH |
4300 | dasd_eckd_get_uid(device, &temp_uid); |
4301 | /* Generate device unique id */ | |
4302 | rc = dasd_eckd_generate_uid(device); | |
4303 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); | |
d41dd122 | 4304 | if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) |
a7602f6c SH |
4305 | dev_err(&device->cdev->dev, "The UID of the DASD has " |
4306 | "changed\n"); | |
2dedf0d9 | 4307 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
d41dd122 SH |
4308 | if (rc) |
4309 | goto out_err; | |
d41dd122 SH |
4310 | |
4311 | /* register lcu with alias handling, enable PAV if this is a new lcu */ | |
f9f8d02f SH |
4312 | rc = dasd_alias_make_device_known_to_lcu(device); |
4313 | if (rc) | |
4314 | return rc; | |
ea4da6ea SH |
4315 | |
4316 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags); | |
4317 | dasd_eckd_validate_server(device, cqr_flags); | |
f4ac1d02 SW |
4318 | |
4319 | /* RE-Read Configuration Data */ | |
55d3a85c | 4320 | dasd_eckd_read_conf(device); |
d41dd122 SH |
4321 | |
4322 | /* Read Feature Codes */ | |
68d1e5f0 | 4323 | dasd_eckd_read_features(device); |
d41dd122 SH |
4324 | |
4325 | /* Read Device Characteristics */ | |
68b781fe | 4326 | rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, |
6fca97a9 | 4327 | &temp_rdc_data, 64); |
d41dd122 | 4328 | if (rc) { |
b8ed5dd5 SH |
4329 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, |
4330 | "Read device characteristic failed, rc=%d", rc); | |
d41dd122 SH |
4331 | goto out_err; |
4332 | } | |
a7602f6c | 4333 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); |
6fca97a9 | 4334 | memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); |
a7602f6c | 4335 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
d41dd122 SH |
4336 | |
4337 | /* add device to alias management */ | |
4338 | dasd_alias_add_device(device); | |
4339 | ||
4340 | return 0; | |
4341 | ||
4342 | out_err: | |
e6125fba | 4343 | return -1; |
d41dd122 SH |
4344 | } |
4345 | ||
501183f2 SH |
4346 | static int dasd_eckd_reload_device(struct dasd_device *device) |
4347 | { | |
4348 | struct dasd_eckd_private *private; | |
4349 | int rc, old_base; | |
2dedf0d9 SH |
4350 | char print_uid[60]; |
4351 | struct dasd_uid uid; | |
4352 | unsigned long flags; | |
501183f2 SH |
4353 | |
4354 | private = (struct dasd_eckd_private *) device->private; | |
2dedf0d9 SH |
4355 | |
4356 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); | |
501183f2 | 4357 | old_base = private->uid.base_unit_addr; |
2dedf0d9 SH |
4358 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
4359 | ||
501183f2 SH |
4360 | /* Read Configuration Data */ |
4361 | rc = dasd_eckd_read_conf(device); | |
4362 | if (rc) | |
4363 | goto out_err; | |
4364 | ||
2dedf0d9 | 4365 | rc = dasd_eckd_generate_uid(device); |
501183f2 SH |
4366 | if (rc) |
4367 | goto out_err; | |
501183f2 SH |
4368 | /* |
4369 | * update unit address configuration and | |
4370 | * add device to alias management | |
4371 | */ | |
4372 | dasd_alias_update_add_device(device); | |
4373 | ||
2dedf0d9 SH |
4374 | dasd_eckd_get_uid(device, &uid); |
4375 | ||
4376 | if (old_base != uid.base_unit_addr) { | |
4377 | if (strlen(uid.vduit) > 0) | |
4378 | snprintf(print_uid, sizeof(print_uid), | |
4379 | "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, | |
4380 | uid.ssid, uid.base_unit_addr, uid.vduit); | |
501183f2 | 4381 | else |
2dedf0d9 SH |
4382 | snprintf(print_uid, sizeof(print_uid), |
4383 | "%s.%s.%04x.%02x", uid.vendor, uid.serial, | |
4384 | uid.ssid, uid.base_unit_addr); | |
501183f2 SH |
4385 | |
4386 | dev_info(&device->cdev->dev, | |
4387 | "An Alias device was reassigned to a new base device " | |
2dedf0d9 | 4388 | "with UID: %s\n", print_uid); |
501183f2 SH |
4389 | } |
4390 | return 0; | |
4391 | ||
4392 | out_err: | |
4393 | return -1; | |
4394 | } | |
4395 | ||
d41dd122 | 4396 | static struct ccw_driver dasd_eckd_driver = { |
3bda058b SO |
4397 | .driver = { |
4398 | .name = "dasd-eckd", | |
4399 | .owner = THIS_MODULE, | |
4400 | }, | |
d41dd122 SH |
4401 | .ids = dasd_eckd_ids, |
4402 | .probe = dasd_eckd_probe, | |
4403 | .remove = dasd_generic_remove, | |
4404 | .set_offline = dasd_generic_set_offline, | |
4405 | .set_online = dasd_eckd_set_online, | |
4406 | .notify = dasd_generic_notify, | |
a4d26c6a | 4407 | .path_event = dasd_generic_path_event, |
4679e893 | 4408 | .shutdown = dasd_generic_shutdown, |
d41dd122 SH |
4409 | .freeze = dasd_generic_pm_freeze, |
4410 | .thaw = dasd_generic_restore_device, | |
4411 | .restore = dasd_generic_restore_device, | |
a23ed009 | 4412 | .uc_handler = dasd_generic_uc_handler, |
420f42ec | 4413 | .int_class = IRQIO_DAS, |
d41dd122 | 4414 | }; |
f3eb5384 | 4415 | |
1da177e4 LT |
4416 | /* |
4417 | * max_blocks is dependent on the amount of storage that is available | |
4418 | * in the static io buffer for each device. Currently each device has | |
4419 | * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has | |
4420 | * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use | |
4421 | * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In | |
4422 | * addition we have one define extent ccw + 16 bytes of data and one | |
4423 | * locate record ccw + 16 bytes of data. That makes: | |
4424 | * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. | |
4425 | * We want to fit two into the available memory so that we can immediately | |
4426 | * start the next request if one finishes off. That makes 249.5 blocks | |
4427 | * for one request. Give a little safety and the result is 240. | |
4428 | */ | |
4429 | static struct dasd_discipline dasd_eckd_discipline = { | |
4430 | .owner = THIS_MODULE, | |
4431 | .name = "ECKD", | |
4432 | .ebcname = "ECKD", | |
ef19298b | 4433 | .max_blocks = 190, |
1da177e4 | 4434 | .check_device = dasd_eckd_check_characteristics, |
8e09f215 | 4435 | .uncheck_device = dasd_eckd_uncheck_device, |
1da177e4 | 4436 | .do_analysis = dasd_eckd_do_analysis, |
a4d26c6a | 4437 | .verify_path = dasd_eckd_verify_path, |
d42e1712 | 4438 | .basic_to_ready = dasd_eckd_basic_to_ready, |
8e09f215 | 4439 | .online_to_ready = dasd_eckd_online_to_ready, |
d42e1712 | 4440 | .ready_to_basic = dasd_eckd_ready_to_basic, |
1da177e4 LT |
4441 | .fill_geometry = dasd_eckd_fill_geometry, |
4442 | .start_IO = dasd_start_IO, | |
4443 | .term_IO = dasd_term_IO, | |
8e09f215 | 4444 | .handle_terminated_request = dasd_eckd_handle_terminated_request, |
1da177e4 | 4445 | .format_device = dasd_eckd_format_device, |
1da177e4 LT |
4446 | .erp_action = dasd_eckd_erp_action, |
4447 | .erp_postaction = dasd_eckd_erp_postaction, | |
5a27e60d | 4448 | .check_for_device_change = dasd_eckd_check_for_device_change, |
8e09f215 SW |
4449 | .build_cp = dasd_eckd_build_alias_cp, |
4450 | .free_cp = dasd_eckd_free_alias_cp, | |
1da177e4 | 4451 | .dump_sense = dasd_eckd_dump_sense, |
fc19f381 | 4452 | .dump_sense_dbf = dasd_eckd_dump_sense_dbf, |
1da177e4 | 4453 | .fill_info = dasd_eckd_fill_info, |
1107ccfb | 4454 | .ioctl = dasd_eckd_ioctl, |
d41dd122 SH |
4455 | .freeze = dasd_eckd_pm_freeze, |
4456 | .restore = dasd_eckd_restore_device, | |
501183f2 | 4457 | .reload = dasd_eckd_reload_device, |
2dedf0d9 | 4458 | .get_uid = dasd_eckd_get_uid, |
f1633031 | 4459 | .kick_validate = dasd_eckd_kick_validate_server, |
1da177e4 LT |
4460 | }; |
4461 | ||
4462 | static int __init | |
4463 | dasd_eckd_init(void) | |
4464 | { | |
736e6ea0 SO |
4465 | int ret; |
4466 | ||
1da177e4 | 4467 | ASCEBC(dasd_eckd_discipline.ebcname, 4); |
f932bcea SW |
4468 | dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), |
4469 | GFP_KERNEL | GFP_DMA); | |
4470 | if (!dasd_reserve_req) | |
4471 | return -ENOMEM; | |
a4d26c6a SW |
4472 | path_verification_worker = kmalloc(sizeof(*path_verification_worker), |
4473 | GFP_KERNEL | GFP_DMA); | |
4474 | if (!path_verification_worker) { | |
4475 | kfree(dasd_reserve_req); | |
4476 | return -ENOMEM; | |
4477 | } | |
736e6ea0 SO |
4478 | ret = ccw_driver_register(&dasd_eckd_driver); |
4479 | if (!ret) | |
4480 | wait_for_device_probe(); | |
a4d26c6a SW |
4481 | else { |
4482 | kfree(path_verification_worker); | |
f932bcea | 4483 | kfree(dasd_reserve_req); |
a4d26c6a | 4484 | } |
736e6ea0 | 4485 | return ret; |
1da177e4 LT |
4486 | } |
4487 | ||
4488 | static void __exit | |
4489 | dasd_eckd_cleanup(void) | |
4490 | { | |
4491 | ccw_driver_unregister(&dasd_eckd_driver); | |
a4d26c6a | 4492 | kfree(path_verification_worker); |
f932bcea | 4493 | kfree(dasd_reserve_req); |
1da177e4 LT |
4494 | } |
4495 | ||
4496 | module_init(dasd_eckd_init); | |
4497 | module_exit(dasd_eckd_cleanup); |