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 | ||
558b9ef0 SW |
88 | static void *rawpadpage; |
89 | ||
eb6e199b SW |
90 | #define INIT_CQR_OK 0 |
91 | #define INIT_CQR_UNFORMATTED 1 | |
92 | #define INIT_CQR_ERROR 2 | |
93 | ||
f932bcea SW |
94 | /* emergency request for reserve/release */ |
95 | static struct { | |
96 | struct dasd_ccw_req cqr; | |
97 | struct ccw1 ccw; | |
98 | char data[32]; | |
99 | } *dasd_reserve_req; | |
100 | static DEFINE_MUTEX(dasd_reserve_mutex); | |
101 | ||
a4d26c6a SW |
102 | /* definitions for the path verification worker */ |
103 | struct path_verification_work_data { | |
104 | struct work_struct worker; | |
105 | struct dasd_device *device; | |
106 | struct dasd_ccw_req cqr; | |
107 | struct ccw1 ccw; | |
108 | __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE]; | |
109 | int isglobal; | |
110 | __u8 tbvpm; | |
111 | }; | |
112 | static struct path_verification_work_data *path_verification_worker; | |
113 | static DEFINE_MUTEX(dasd_path_verification_mutex); | |
eb6e199b | 114 | |
1da177e4 LT |
115 | /* initial attempt at a probe function. this can be simplified once |
116 | * the other detection code is gone */ | |
117 | static int | |
118 | dasd_eckd_probe (struct ccw_device *cdev) | |
119 | { | |
120 | int ret; | |
121 | ||
40545573 | 122 | /* set ECKD specific ccw-device options */ |
454e1fa1 PO |
123 | ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE | |
124 | CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH); | |
40545573 | 125 | if (ret) { |
b8ed5dd5 SH |
126 | DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", |
127 | "dasd_eckd_probe: could not set " | |
128 | "ccw-device options"); | |
1da177e4 | 129 | return ret; |
40545573 HH |
130 | } |
131 | ret = dasd_generic_probe(cdev, &dasd_eckd_discipline); | |
132 | return ret; | |
1da177e4 LT |
133 | } |
134 | ||
135 | static int | |
136 | dasd_eckd_set_online(struct ccw_device *cdev) | |
137 | { | |
40545573 | 138 | return dasd_generic_set_online(cdev, &dasd_eckd_discipline); |
1da177e4 LT |
139 | } |
140 | ||
1da177e4 LT |
141 | static const int sizes_trk0[] = { 28, 148, 84 }; |
142 | #define LABEL_SIZE 140 | |
143 | ||
3bc9fef9 SH |
144 | /* head and record addresses of count_area read in analysis ccw */ |
145 | static const int count_area_head[] = { 0, 0, 0, 0, 2 }; | |
146 | static const int count_area_rec[] = { 1, 2, 3, 4, 1 }; | |
147 | ||
1da177e4 LT |
148 | static inline unsigned int |
149 | round_up_multiple(unsigned int no, unsigned int mult) | |
150 | { | |
151 | int rem = no % mult; | |
152 | return (rem ? no - rem + mult : no); | |
153 | } | |
154 | ||
155 | static inline unsigned int | |
156 | ceil_quot(unsigned int d1, unsigned int d2) | |
157 | { | |
158 | return (d1 + (d2 - 1)) / d2; | |
159 | } | |
160 | ||
4d284cac | 161 | static unsigned int |
1da177e4 LT |
162 | recs_per_track(struct dasd_eckd_characteristics * rdc, |
163 | unsigned int kl, unsigned int dl) | |
164 | { | |
165 | int dn, kn; | |
166 | ||
167 | switch (rdc->dev_type) { | |
168 | case 0x3380: | |
169 | if (kl) | |
170 | return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + | |
171 | ceil_quot(dl + 12, 32)); | |
172 | else | |
173 | return 1499 / (15 + ceil_quot(dl + 12, 32)); | |
174 | case 0x3390: | |
175 | dn = ceil_quot(dl + 6, 232) + 1; | |
176 | if (kl) { | |
177 | kn = ceil_quot(kl + 6, 232) + 1; | |
178 | return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + | |
179 | 9 + ceil_quot(dl + 6 * dn, 34)); | |
180 | } else | |
181 | return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); | |
182 | case 0x9345: | |
183 | dn = ceil_quot(dl + 6, 232) + 1; | |
184 | if (kl) { | |
185 | kn = ceil_quot(kl + 6, 232) + 1; | |
186 | return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + | |
187 | ceil_quot(dl + 6 * dn, 34)); | |
188 | } else | |
189 | return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); | |
190 | } | |
191 | return 0; | |
192 | } | |
193 | ||
b44b0ab3 SW |
194 | static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) |
195 | { | |
196 | geo->cyl = (__u16) cyl; | |
197 | geo->head = cyl >> 16; | |
198 | geo->head <<= 4; | |
199 | geo->head |= head; | |
200 | } | |
201 | ||
4d284cac | 202 | static int |
1da177e4 LT |
203 | check_XRC (struct ccw1 *de_ccw, |
204 | struct DE_eckd_data *data, | |
205 | struct dasd_device *device) | |
206 | { | |
207 | struct dasd_eckd_private *private; | |
d54853ef | 208 | int rc; |
1da177e4 LT |
209 | |
210 | private = (struct dasd_eckd_private *) device->private; | |
d54853ef MS |
211 | if (!private->rdc_data.facilities.XRC_supported) |
212 | return 0; | |
1da177e4 LT |
213 | |
214 | /* switch on System Time Stamp - needed for XRC Support */ | |
d54853ef MS |
215 | data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ |
216 | data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ | |
1da177e4 | 217 | |
d54853ef MS |
218 | rc = get_sync_clock(&data->ep_sys_time); |
219 | /* Ignore return code if sync clock is switched off. */ | |
a8f6db4d | 220 | if (rc == -EOPNOTSUPP || rc == -EACCES) |
d54853ef | 221 | rc = 0; |
1da177e4 | 222 | |
8e09f215 | 223 | de_ccw->count = sizeof(struct DE_eckd_data); |
d54853ef MS |
224 | de_ccw->flags |= CCW_FLAG_SLI; |
225 | return rc; | |
226 | } | |
1da177e4 | 227 | |
4d284cac | 228 | static int |
b44b0ab3 SW |
229 | define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, |
230 | unsigned int totrk, int cmd, struct dasd_device *device) | |
1da177e4 LT |
231 | { |
232 | struct dasd_eckd_private *private; | |
b44b0ab3 SW |
233 | u32 begcyl, endcyl; |
234 | u16 heads, beghead, endhead; | |
d54853ef | 235 | int rc = 0; |
1da177e4 LT |
236 | |
237 | private = (struct dasd_eckd_private *) device->private; | |
238 | ||
239 | ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; | |
240 | ccw->flags = 0; | |
241 | ccw->count = 16; | |
242 | ccw->cda = (__u32) __pa(data); | |
243 | ||
8e09f215 | 244 | memset(data, 0, sizeof(struct DE_eckd_data)); |
1da177e4 LT |
245 | switch (cmd) { |
246 | case DASD_ECKD_CCW_READ_HOME_ADDRESS: | |
247 | case DASD_ECKD_CCW_READ_RECORD_ZERO: | |
248 | case DASD_ECKD_CCW_READ: | |
249 | case DASD_ECKD_CCW_READ_MT: | |
250 | case DASD_ECKD_CCW_READ_CKD: | |
251 | case DASD_ECKD_CCW_READ_CKD_MT: | |
252 | case DASD_ECKD_CCW_READ_KD: | |
253 | case DASD_ECKD_CCW_READ_KD_MT: | |
254 | case DASD_ECKD_CCW_READ_COUNT: | |
255 | data->mask.perm = 0x1; | |
256 | data->attributes.operation = private->attrib.operation; | |
257 | break; | |
258 | case DASD_ECKD_CCW_WRITE: | |
259 | case DASD_ECKD_CCW_WRITE_MT: | |
260 | case DASD_ECKD_CCW_WRITE_KD: | |
261 | case DASD_ECKD_CCW_WRITE_KD_MT: | |
262 | data->mask.perm = 0x02; | |
263 | data->attributes.operation = private->attrib.operation; | |
d54853ef | 264 | rc = check_XRC (ccw, data, device); |
1da177e4 LT |
265 | break; |
266 | case DASD_ECKD_CCW_WRITE_CKD: | |
267 | case DASD_ECKD_CCW_WRITE_CKD_MT: | |
268 | data->attributes.operation = DASD_BYPASS_CACHE; | |
d54853ef | 269 | rc = check_XRC (ccw, data, device); |
1da177e4 LT |
270 | break; |
271 | case DASD_ECKD_CCW_ERASE: | |
272 | case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: | |
273 | case DASD_ECKD_CCW_WRITE_RECORD_ZERO: | |
274 | data->mask.perm = 0x3; | |
275 | data->mask.auth = 0x1; | |
276 | data->attributes.operation = DASD_BYPASS_CACHE; | |
d54853ef | 277 | rc = check_XRC (ccw, data, device); |
1da177e4 LT |
278 | break; |
279 | default: | |
fc19f381 SH |
280 | dev_err(&device->cdev->dev, |
281 | "0x%x is not a known command\n", cmd); | |
1da177e4 LT |
282 | break; |
283 | } | |
284 | ||
285 | data->attributes.mode = 0x3; /* ECKD */ | |
286 | ||
287 | if ((private->rdc_data.cu_type == 0x2105 || | |
288 | private->rdc_data.cu_type == 0x2107 || | |
289 | private->rdc_data.cu_type == 0x1750) | |
290 | && !(private->uses_cdl && trk < 2)) | |
291 | data->ga_extended |= 0x40; /* Regular Data Format Mode */ | |
292 | ||
b44b0ab3 SW |
293 | heads = private->rdc_data.trk_per_cyl; |
294 | begcyl = trk / heads; | |
295 | beghead = trk % heads; | |
296 | endcyl = totrk / heads; | |
297 | endhead = totrk % heads; | |
1da177e4 LT |
298 | |
299 | /* check for sequential prestage - enhance cylinder range */ | |
300 | if (data->attributes.operation == DASD_SEQ_PRESTAGE || | |
301 | data->attributes.operation == DASD_SEQ_ACCESS) { | |
138c014d | 302 | |
b44b0ab3 SW |
303 | if (endcyl + private->attrib.nr_cyl < private->real_cyl) |
304 | endcyl += private->attrib.nr_cyl; | |
1da177e4 | 305 | else |
b44b0ab3 | 306 | endcyl = (private->real_cyl - 1); |
1da177e4 LT |
307 | } |
308 | ||
b44b0ab3 SW |
309 | set_ch_t(&data->beg_ext, begcyl, beghead); |
310 | set_ch_t(&data->end_ext, endcyl, endhead); | |
d54853ef | 311 | return rc; |
1da177e4 LT |
312 | } |
313 | ||
8e09f215 SW |
314 | static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata, |
315 | struct dasd_device *device) | |
316 | { | |
317 | struct dasd_eckd_private *private; | |
318 | int rc; | |
319 | ||
320 | private = (struct dasd_eckd_private *) device->private; | |
321 | if (!private->rdc_data.facilities.XRC_supported) | |
322 | return 0; | |
323 | ||
324 | /* switch on System Time Stamp - needed for XRC Support */ | |
f3eb5384 SW |
325 | pfxdata->define_extent.ga_extended |= 0x08; /* 'Time Stamp Valid' */ |
326 | pfxdata->define_extent.ga_extended |= 0x02; /* 'Extended Parameter' */ | |
8e09f215 SW |
327 | pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ |
328 | ||
f3eb5384 | 329 | rc = get_sync_clock(&pfxdata->define_extent.ep_sys_time); |
8e09f215 | 330 | /* Ignore return code if sync clock is switched off. */ |
a8f6db4d | 331 | if (rc == -EOPNOTSUPP || rc == -EACCES) |
8e09f215 SW |
332 | rc = 0; |
333 | return rc; | |
334 | } | |
335 | ||
f3eb5384 SW |
336 | static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk, |
337 | unsigned int rec_on_trk, int count, int cmd, | |
338 | struct dasd_device *device, unsigned int reclen, | |
339 | unsigned int tlf) | |
340 | { | |
341 | struct dasd_eckd_private *private; | |
342 | int sector; | |
343 | int dn, d; | |
344 | ||
345 | private = (struct dasd_eckd_private *) device->private; | |
346 | ||
347 | memset(data, 0, sizeof(*data)); | |
348 | sector = 0; | |
349 | if (rec_on_trk) { | |
350 | switch (private->rdc_data.dev_type) { | |
351 | case 0x3390: | |
352 | dn = ceil_quot(reclen + 6, 232); | |
353 | d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); | |
354 | sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; | |
355 | break; | |
356 | case 0x3380: | |
357 | d = 7 + ceil_quot(reclen + 12, 32); | |
358 | sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; | |
359 | break; | |
360 | } | |
361 | } | |
362 | data->sector = sector; | |
363 | /* note: meaning of count depends on the operation | |
364 | * for record based I/O it's the number of records, but for | |
365 | * track based I/O it's the number of tracks | |
366 | */ | |
367 | data->count = count; | |
368 | switch (cmd) { | |
369 | case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: | |
370 | data->operation.orientation = 0x3; | |
371 | data->operation.operation = 0x03; | |
372 | break; | |
373 | case DASD_ECKD_CCW_READ_HOME_ADDRESS: | |
374 | data->operation.orientation = 0x3; | |
375 | data->operation.operation = 0x16; | |
376 | break; | |
377 | case DASD_ECKD_CCW_WRITE_RECORD_ZERO: | |
378 | data->operation.orientation = 0x1; | |
379 | data->operation.operation = 0x03; | |
380 | data->count++; | |
381 | break; | |
382 | case DASD_ECKD_CCW_READ_RECORD_ZERO: | |
383 | data->operation.orientation = 0x3; | |
384 | data->operation.operation = 0x16; | |
385 | data->count++; | |
386 | break; | |
387 | case DASD_ECKD_CCW_WRITE: | |
388 | case DASD_ECKD_CCW_WRITE_MT: | |
389 | case DASD_ECKD_CCW_WRITE_KD: | |
390 | case DASD_ECKD_CCW_WRITE_KD_MT: | |
391 | data->auxiliary.length_valid = 0x1; | |
392 | data->length = reclen; | |
393 | data->operation.operation = 0x01; | |
394 | break; | |
395 | case DASD_ECKD_CCW_WRITE_CKD: | |
396 | case DASD_ECKD_CCW_WRITE_CKD_MT: | |
397 | data->auxiliary.length_valid = 0x1; | |
398 | data->length = reclen; | |
399 | data->operation.operation = 0x03; | |
400 | break; | |
e4dbb0f2 SH |
401 | case DASD_ECKD_CCW_WRITE_FULL_TRACK: |
402 | data->operation.orientation = 0x0; | |
403 | data->operation.operation = 0x3F; | |
404 | data->extended_operation = 0x11; | |
405 | data->length = 0; | |
406 | data->extended_parameter_length = 0x02; | |
407 | if (data->count > 8) { | |
408 | data->extended_parameter[0] = 0xFF; | |
409 | data->extended_parameter[1] = 0xFF; | |
410 | data->extended_parameter[1] <<= (16 - count); | |
411 | } else { | |
412 | data->extended_parameter[0] = 0xFF; | |
413 | data->extended_parameter[0] <<= (8 - count); | |
414 | data->extended_parameter[1] = 0x00; | |
415 | } | |
416 | data->sector = 0xFF; | |
417 | break; | |
f3eb5384 SW |
418 | case DASD_ECKD_CCW_WRITE_TRACK_DATA: |
419 | data->auxiliary.length_valid = 0x1; | |
420 | data->length = reclen; /* not tlf, as one might think */ | |
421 | data->operation.operation = 0x3F; | |
422 | data->extended_operation = 0x23; | |
423 | break; | |
424 | case DASD_ECKD_CCW_READ: | |
425 | case DASD_ECKD_CCW_READ_MT: | |
426 | case DASD_ECKD_CCW_READ_KD: | |
427 | case DASD_ECKD_CCW_READ_KD_MT: | |
428 | data->auxiliary.length_valid = 0x1; | |
429 | data->length = reclen; | |
430 | data->operation.operation = 0x06; | |
431 | break; | |
432 | case DASD_ECKD_CCW_READ_CKD: | |
433 | case DASD_ECKD_CCW_READ_CKD_MT: | |
434 | data->auxiliary.length_valid = 0x1; | |
435 | data->length = reclen; | |
436 | data->operation.operation = 0x16; | |
437 | break; | |
438 | case DASD_ECKD_CCW_READ_COUNT: | |
439 | data->operation.operation = 0x06; | |
440 | break; | |
e4dbb0f2 SH |
441 | case DASD_ECKD_CCW_READ_TRACK: |
442 | data->operation.orientation = 0x1; | |
443 | data->operation.operation = 0x0C; | |
444 | data->extended_parameter_length = 0; | |
445 | data->sector = 0xFF; | |
446 | break; | |
f3eb5384 SW |
447 | case DASD_ECKD_CCW_READ_TRACK_DATA: |
448 | data->auxiliary.length_valid = 0x1; | |
449 | data->length = tlf; | |
450 | data->operation.operation = 0x0C; | |
451 | break; | |
452 | case DASD_ECKD_CCW_ERASE: | |
453 | data->length = reclen; | |
454 | data->auxiliary.length_valid = 0x1; | |
455 | data->operation.operation = 0x0b; | |
456 | break; | |
457 | default: | |
458 | DBF_DEV_EVENT(DBF_ERR, device, | |
459 | "fill LRE unknown opcode 0x%x", cmd); | |
460 | BUG(); | |
461 | } | |
462 | set_ch_t(&data->seek_addr, | |
463 | trk / private->rdc_data.trk_per_cyl, | |
464 | trk % private->rdc_data.trk_per_cyl); | |
465 | data->search_arg.cyl = data->seek_addr.cyl; | |
466 | data->search_arg.head = data->seek_addr.head; | |
467 | data->search_arg.record = rec_on_trk; | |
468 | } | |
469 | ||
470 | static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, | |
471 | unsigned int trk, unsigned int totrk, int cmd, | |
472 | struct dasd_device *basedev, struct dasd_device *startdev, | |
473 | unsigned char format, unsigned int rec_on_trk, int count, | |
474 | unsigned int blksize, unsigned int tlf) | |
8e09f215 SW |
475 | { |
476 | struct dasd_eckd_private *basepriv, *startpriv; | |
f3eb5384 SW |
477 | struct DE_eckd_data *dedata; |
478 | struct LRE_eckd_data *lredata; | |
b44b0ab3 SW |
479 | u32 begcyl, endcyl; |
480 | u16 heads, beghead, endhead; | |
8e09f215 SW |
481 | int rc = 0; |
482 | ||
483 | basepriv = (struct dasd_eckd_private *) basedev->private; | |
484 | startpriv = (struct dasd_eckd_private *) startdev->private; | |
f3eb5384 SW |
485 | dedata = &pfxdata->define_extent; |
486 | lredata = &pfxdata->locate_record; | |
8e09f215 SW |
487 | |
488 | ccw->cmd_code = DASD_ECKD_CCW_PFX; | |
489 | ccw->flags = 0; | |
e4dbb0f2 SH |
490 | if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) { |
491 | ccw->count = sizeof(*pfxdata) + 2; | |
492 | ccw->cda = (__u32) __pa(pfxdata); | |
493 | memset(pfxdata, 0, sizeof(*pfxdata) + 2); | |
494 | } else { | |
495 | ccw->count = sizeof(*pfxdata); | |
496 | ccw->cda = (__u32) __pa(pfxdata); | |
497 | memset(pfxdata, 0, sizeof(*pfxdata)); | |
498 | } | |
8e09f215 | 499 | |
8e09f215 | 500 | /* prefix data */ |
f3eb5384 SW |
501 | if (format > 1) { |
502 | DBF_DEV_EVENT(DBF_ERR, basedev, | |
503 | "PFX LRE unknown format 0x%x", format); | |
504 | BUG(); | |
505 | return -EINVAL; | |
506 | } | |
507 | pfxdata->format = format; | |
4abb08c2 SW |
508 | pfxdata->base_address = basepriv->ned->unit_addr; |
509 | pfxdata->base_lss = basepriv->ned->ID; | |
f3eb5384 | 510 | pfxdata->validity.define_extent = 1; |
8e09f215 SW |
511 | |
512 | /* private uid is kept up to date, conf_data may be outdated */ | |
513 | if (startpriv->uid.type != UA_BASE_DEVICE) { | |
514 | pfxdata->validity.verify_base = 1; | |
515 | if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) | |
516 | pfxdata->validity.hyper_pav = 1; | |
517 | } | |
518 | ||
519 | /* define extend data (mostly)*/ | |
520 | switch (cmd) { | |
521 | case DASD_ECKD_CCW_READ_HOME_ADDRESS: | |
522 | case DASD_ECKD_CCW_READ_RECORD_ZERO: | |
523 | case DASD_ECKD_CCW_READ: | |
524 | case DASD_ECKD_CCW_READ_MT: | |
525 | case DASD_ECKD_CCW_READ_CKD: | |
526 | case DASD_ECKD_CCW_READ_CKD_MT: | |
527 | case DASD_ECKD_CCW_READ_KD: | |
528 | case DASD_ECKD_CCW_READ_KD_MT: | |
529 | case DASD_ECKD_CCW_READ_COUNT: | |
f3eb5384 SW |
530 | dedata->mask.perm = 0x1; |
531 | dedata->attributes.operation = basepriv->attrib.operation; | |
532 | break; | |
e4dbb0f2 | 533 | case DASD_ECKD_CCW_READ_TRACK: |
f3eb5384 SW |
534 | case DASD_ECKD_CCW_READ_TRACK_DATA: |
535 | dedata->mask.perm = 0x1; | |
536 | dedata->attributes.operation = basepriv->attrib.operation; | |
537 | dedata->blk_size = 0; | |
8e09f215 SW |
538 | break; |
539 | case DASD_ECKD_CCW_WRITE: | |
540 | case DASD_ECKD_CCW_WRITE_MT: | |
541 | case DASD_ECKD_CCW_WRITE_KD: | |
542 | case DASD_ECKD_CCW_WRITE_KD_MT: | |
f3eb5384 SW |
543 | dedata->mask.perm = 0x02; |
544 | dedata->attributes.operation = basepriv->attrib.operation; | |
8e09f215 SW |
545 | rc = check_XRC_on_prefix(pfxdata, basedev); |
546 | break; | |
547 | case DASD_ECKD_CCW_WRITE_CKD: | |
548 | case DASD_ECKD_CCW_WRITE_CKD_MT: | |
f3eb5384 | 549 | dedata->attributes.operation = DASD_BYPASS_CACHE; |
8e09f215 SW |
550 | rc = check_XRC_on_prefix(pfxdata, basedev); |
551 | break; | |
552 | case DASD_ECKD_CCW_ERASE: | |
553 | case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: | |
554 | case DASD_ECKD_CCW_WRITE_RECORD_ZERO: | |
f3eb5384 SW |
555 | dedata->mask.perm = 0x3; |
556 | dedata->mask.auth = 0x1; | |
557 | dedata->attributes.operation = DASD_BYPASS_CACHE; | |
8e09f215 SW |
558 | rc = check_XRC_on_prefix(pfxdata, basedev); |
559 | break; | |
e4dbb0f2 SH |
560 | case DASD_ECKD_CCW_WRITE_FULL_TRACK: |
561 | dedata->mask.perm = 0x03; | |
562 | dedata->attributes.operation = basepriv->attrib.operation; | |
563 | dedata->blk_size = 0; | |
564 | break; | |
f3eb5384 SW |
565 | case DASD_ECKD_CCW_WRITE_TRACK_DATA: |
566 | dedata->mask.perm = 0x02; | |
567 | dedata->attributes.operation = basepriv->attrib.operation; | |
568 | dedata->blk_size = blksize; | |
569 | rc = check_XRC_on_prefix(pfxdata, basedev); | |
8e09f215 | 570 | break; |
f3eb5384 SW |
571 | default: |
572 | DBF_DEV_EVENT(DBF_ERR, basedev, | |
573 | "PFX LRE unknown opcode 0x%x", cmd); | |
574 | BUG(); | |
575 | return -EINVAL; | |
8e09f215 SW |
576 | } |
577 | ||
f3eb5384 | 578 | dedata->attributes.mode = 0x3; /* ECKD */ |
8e09f215 SW |
579 | |
580 | if ((basepriv->rdc_data.cu_type == 0x2105 || | |
581 | basepriv->rdc_data.cu_type == 0x2107 || | |
582 | basepriv->rdc_data.cu_type == 0x1750) | |
583 | && !(basepriv->uses_cdl && trk < 2)) | |
f3eb5384 | 584 | dedata->ga_extended |= 0x40; /* Regular Data Format Mode */ |
8e09f215 | 585 | |
b44b0ab3 SW |
586 | heads = basepriv->rdc_data.trk_per_cyl; |
587 | begcyl = trk / heads; | |
588 | beghead = trk % heads; | |
589 | endcyl = totrk / heads; | |
590 | endhead = totrk % heads; | |
8e09f215 SW |
591 | |
592 | /* check for sequential prestage - enhance cylinder range */ | |
f3eb5384 SW |
593 | if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || |
594 | dedata->attributes.operation == DASD_SEQ_ACCESS) { | |
8e09f215 | 595 | |
b44b0ab3 SW |
596 | if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) |
597 | endcyl += basepriv->attrib.nr_cyl; | |
8e09f215 | 598 | else |
b44b0ab3 | 599 | endcyl = (basepriv->real_cyl - 1); |
8e09f215 SW |
600 | } |
601 | ||
f3eb5384 SW |
602 | set_ch_t(&dedata->beg_ext, begcyl, beghead); |
603 | set_ch_t(&dedata->end_ext, endcyl, endhead); | |
604 | ||
605 | if (format == 1) { | |
606 | fill_LRE_data(lredata, trk, rec_on_trk, count, cmd, | |
607 | basedev, blksize, tlf); | |
608 | } | |
609 | ||
8e09f215 SW |
610 | return rc; |
611 | } | |
612 | ||
f3eb5384 SW |
613 | static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, |
614 | unsigned int trk, unsigned int totrk, int cmd, | |
615 | struct dasd_device *basedev, struct dasd_device *startdev) | |
616 | { | |
617 | return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev, | |
618 | 0, 0, 0, 0, 0); | |
619 | } | |
620 | ||
4d284cac | 621 | static void |
b44b0ab3 SW |
622 | locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, |
623 | unsigned int rec_on_trk, int no_rec, int cmd, | |
1da177e4 LT |
624 | struct dasd_device * device, int reclen) |
625 | { | |
626 | struct dasd_eckd_private *private; | |
627 | int sector; | |
628 | int dn, d; | |
138c014d | 629 | |
1da177e4 LT |
630 | private = (struct dasd_eckd_private *) device->private; |
631 | ||
632 | DBF_DEV_EVENT(DBF_INFO, device, | |
633 | "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", | |
634 | trk, rec_on_trk, no_rec, cmd, reclen); | |
635 | ||
636 | ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; | |
637 | ccw->flags = 0; | |
638 | ccw->count = 16; | |
639 | ccw->cda = (__u32) __pa(data); | |
640 | ||
8e09f215 | 641 | memset(data, 0, sizeof(struct LO_eckd_data)); |
1da177e4 LT |
642 | sector = 0; |
643 | if (rec_on_trk) { | |
644 | switch (private->rdc_data.dev_type) { | |
645 | case 0x3390: | |
646 | dn = ceil_quot(reclen + 6, 232); | |
647 | d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); | |
648 | sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; | |
649 | break; | |
650 | case 0x3380: | |
651 | d = 7 + ceil_quot(reclen + 12, 32); | |
652 | sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; | |
653 | break; | |
654 | } | |
655 | } | |
656 | data->sector = sector; | |
657 | data->count = no_rec; | |
658 | switch (cmd) { | |
659 | case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: | |
660 | data->operation.orientation = 0x3; | |
661 | data->operation.operation = 0x03; | |
662 | break; | |
663 | case DASD_ECKD_CCW_READ_HOME_ADDRESS: | |
664 | data->operation.orientation = 0x3; | |
665 | data->operation.operation = 0x16; | |
666 | break; | |
667 | case DASD_ECKD_CCW_WRITE_RECORD_ZERO: | |
668 | data->operation.orientation = 0x1; | |
669 | data->operation.operation = 0x03; | |
670 | data->count++; | |
671 | break; | |
672 | case DASD_ECKD_CCW_READ_RECORD_ZERO: | |
673 | data->operation.orientation = 0x3; | |
674 | data->operation.operation = 0x16; | |
675 | data->count++; | |
676 | break; | |
677 | case DASD_ECKD_CCW_WRITE: | |
678 | case DASD_ECKD_CCW_WRITE_MT: | |
679 | case DASD_ECKD_CCW_WRITE_KD: | |
680 | case DASD_ECKD_CCW_WRITE_KD_MT: | |
681 | data->auxiliary.last_bytes_used = 0x1; | |
682 | data->length = reclen; | |
683 | data->operation.operation = 0x01; | |
684 | break; | |
685 | case DASD_ECKD_CCW_WRITE_CKD: | |
686 | case DASD_ECKD_CCW_WRITE_CKD_MT: | |
687 | data->auxiliary.last_bytes_used = 0x1; | |
688 | data->length = reclen; | |
689 | data->operation.operation = 0x03; | |
690 | break; | |
691 | case DASD_ECKD_CCW_READ: | |
692 | case DASD_ECKD_CCW_READ_MT: | |
693 | case DASD_ECKD_CCW_READ_KD: | |
694 | case DASD_ECKD_CCW_READ_KD_MT: | |
695 | data->auxiliary.last_bytes_used = 0x1; | |
696 | data->length = reclen; | |
697 | data->operation.operation = 0x06; | |
698 | break; | |
699 | case DASD_ECKD_CCW_READ_CKD: | |
700 | case DASD_ECKD_CCW_READ_CKD_MT: | |
701 | data->auxiliary.last_bytes_used = 0x1; | |
702 | data->length = reclen; | |
703 | data->operation.operation = 0x16; | |
704 | break; | |
705 | case DASD_ECKD_CCW_READ_COUNT: | |
706 | data->operation.operation = 0x06; | |
707 | break; | |
708 | case DASD_ECKD_CCW_ERASE: | |
709 | data->length = reclen; | |
710 | data->auxiliary.last_bytes_used = 0x1; | |
711 | data->operation.operation = 0x0b; | |
712 | break; | |
713 | default: | |
fc19f381 SH |
714 | DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record " |
715 | "opcode 0x%x", cmd); | |
1da177e4 | 716 | } |
b44b0ab3 SW |
717 | set_ch_t(&data->seek_addr, |
718 | trk / private->rdc_data.trk_per_cyl, | |
719 | trk % private->rdc_data.trk_per_cyl); | |
720 | data->search_arg.cyl = data->seek_addr.cyl; | |
721 | data->search_arg.head = data->seek_addr.head; | |
1da177e4 LT |
722 | data->search_arg.record = rec_on_trk; |
723 | } | |
724 | ||
725 | /* | |
726 | * Returns 1 if the block is one of the special blocks that needs | |
727 | * to get read/written with the KD variant of the command. | |
728 | * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and | |
729 | * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. | |
730 | * Luckily the KD variants differ only by one bit (0x08) from the | |
731 | * normal variant. So don't wonder about code like: | |
732 | * if (dasd_eckd_cdl_special(blk_per_trk, recid)) | |
733 | * ccw->cmd_code |= 0x8; | |
734 | */ | |
735 | static inline int | |
736 | dasd_eckd_cdl_special(int blk_per_trk, int recid) | |
737 | { | |
738 | if (recid < 3) | |
739 | return 1; | |
740 | if (recid < blk_per_trk) | |
741 | return 0; | |
742 | if (recid < 2 * blk_per_trk) | |
743 | return 1; | |
744 | return 0; | |
745 | } | |
746 | ||
747 | /* | |
748 | * Returns the record size for the special blocks of the cdl format. | |
749 | * Only returns something useful if dasd_eckd_cdl_special is true | |
750 | * for the recid. | |
751 | */ | |
752 | static inline int | |
753 | dasd_eckd_cdl_reclen(int recid) | |
754 | { | |
755 | if (recid < 3) | |
756 | return sizes_trk0[recid]; | |
757 | return LABEL_SIZE; | |
758 | } | |
b206181d SH |
759 | /* create unique id from private structure. */ |
760 | static void create_uid(struct dasd_eckd_private *private) | |
3d052595 | 761 | { |
4abb08c2 | 762 | int count; |
b206181d | 763 | struct dasd_uid *uid; |
3d052595 | 764 | |
2dedf0d9 | 765 | uid = &private->uid; |
3d052595 | 766 | memset(uid, 0, sizeof(struct dasd_uid)); |
4abb08c2 | 767 | memcpy(uid->vendor, private->ned->HDA_manufacturer, |
d0710c7c | 768 | sizeof(uid->vendor) - 1); |
3d052595 | 769 | EBCASC(uid->vendor, sizeof(uid->vendor) - 1); |
4abb08c2 | 770 | memcpy(uid->serial, private->ned->HDA_location, |
d0710c7c | 771 | sizeof(uid->serial) - 1); |
3d052595 | 772 | EBCASC(uid->serial, sizeof(uid->serial) - 1); |
4abb08c2 | 773 | uid->ssid = private->gneq->subsystemID; |
a419aef8 | 774 | uid->real_unit_addr = private->ned->unit_addr; |
4abb08c2 SW |
775 | if (private->sneq) { |
776 | uid->type = private->sneq->sua_flags; | |
8e09f215 | 777 | if (uid->type == UA_BASE_PAV_ALIAS) |
4abb08c2 | 778 | uid->base_unit_addr = private->sneq->base_unit_addr; |
8e09f215 SW |
779 | } else { |
780 | uid->type = UA_BASE_DEVICE; | |
781 | } | |
4abb08c2 SW |
782 | if (private->vdsneq) { |
783 | for (count = 0; count < 16; count++) { | |
784 | sprintf(uid->vduit+2*count, "%02x", | |
785 | private->vdsneq->uit[count]); | |
786 | } | |
787 | } | |
b206181d SH |
788 | } |
789 | ||
790 | /* | |
791 | * Generate device unique id that specifies the physical device. | |
792 | */ | |
793 | static int dasd_eckd_generate_uid(struct dasd_device *device) | |
794 | { | |
795 | struct dasd_eckd_private *private; | |
796 | unsigned long flags; | |
797 | ||
798 | private = (struct dasd_eckd_private *) device->private; | |
799 | if (!private) | |
800 | return -ENODEV; | |
801 | if (!private->ned || !private->gneq) | |
802 | return -ENODEV; | |
803 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); | |
804 | create_uid(private); | |
2dedf0d9 | 805 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
3d052595 HH |
806 | return 0; |
807 | } | |
808 | ||
2dedf0d9 SH |
809 | static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid) |
810 | { | |
811 | struct dasd_eckd_private *private; | |
812 | unsigned long flags; | |
813 | ||
814 | if (device->private) { | |
815 | private = (struct dasd_eckd_private *)device->private; | |
816 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); | |
817 | *uid = private->uid; | |
818 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); | |
819 | return 0; | |
820 | } | |
821 | return -EINVAL; | |
822 | } | |
823 | ||
b206181d SH |
824 | /* |
825 | * compare device UID with data of a given dasd_eckd_private structure | |
826 | * return 0 for match | |
827 | */ | |
828 | static int dasd_eckd_compare_path_uid(struct dasd_device *device, | |
829 | struct dasd_eckd_private *private) | |
830 | { | |
831 | struct dasd_uid device_uid; | |
832 | ||
833 | create_uid(private); | |
834 | dasd_eckd_get_uid(device, &device_uid); | |
835 | ||
836 | return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid)); | |
837 | } | |
838 | ||
a4d26c6a SW |
839 | static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device, |
840 | struct dasd_ccw_req *cqr, | |
841 | __u8 *rcd_buffer, | |
842 | __u8 lpm) | |
17283b56 | 843 | { |
17283b56 | 844 | struct ccw1 *ccw; |
a4d26c6a SW |
845 | /* |
846 | * buffer has to start with EBCDIC "V1.0" to show | |
847 | * support for virtual device SNEQ | |
848 | */ | |
849 | rcd_buffer[0] = 0xE5; | |
850 | rcd_buffer[1] = 0xF1; | |
851 | rcd_buffer[2] = 0x4B; | |
852 | rcd_buffer[3] = 0xF0; | |
17283b56 CH |
853 | |
854 | ccw = cqr->cpaddr; | |
a4d26c6a SW |
855 | ccw->cmd_code = DASD_ECKD_CCW_RCD; |
856 | ccw->flags = 0; | |
17283b56 | 857 | ccw->cda = (__u32)(addr_t)rcd_buffer; |
a4d26c6a SW |
858 | ccw->count = DASD_ECKD_RCD_DATA_SIZE; |
859 | cqr->magic = DASD_ECKD_MAGIC; | |
17283b56 | 860 | |
8e09f215 SW |
861 | cqr->startdev = device; |
862 | cqr->memdev = device; | |
863 | cqr->block = NULL; | |
17283b56 CH |
864 | cqr->expires = 10*HZ; |
865 | cqr->lpm = lpm; | |
eb6e199b | 866 | cqr->retries = 256; |
1aae0560 | 867 | cqr->buildclk = get_tod_clock(); |
17283b56 | 868 | cqr->status = DASD_CQR_FILLED; |
a4d26c6a SW |
869 | set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); |
870 | } | |
871 | ||
5915a873 SH |
872 | /* |
873 | * Wakeup helper for read_conf | |
874 | * if the cqr is not done and needs some error recovery | |
875 | * the buffer has to be re-initialized with the EBCDIC "V1.0" | |
876 | * to show support for virtual device SNEQ | |
877 | */ | |
878 | static void read_conf_cb(struct dasd_ccw_req *cqr, void *data) | |
879 | { | |
880 | struct ccw1 *ccw; | |
881 | __u8 *rcd_buffer; | |
882 | ||
883 | if (cqr->status != DASD_CQR_DONE) { | |
884 | ccw = cqr->cpaddr; | |
885 | rcd_buffer = (__u8 *)((addr_t) ccw->cda); | |
886 | memset(rcd_buffer, 0, sizeof(*rcd_buffer)); | |
887 | ||
888 | rcd_buffer[0] = 0xE5; | |
889 | rcd_buffer[1] = 0xF1; | |
890 | rcd_buffer[2] = 0x4B; | |
891 | rcd_buffer[3] = 0xF0; | |
892 | } | |
893 | dasd_wakeup_cb(cqr, data); | |
894 | } | |
895 | ||
a4d26c6a SW |
896 | static int dasd_eckd_read_conf_immediately(struct dasd_device *device, |
897 | struct dasd_ccw_req *cqr, | |
898 | __u8 *rcd_buffer, | |
899 | __u8 lpm) | |
900 | { | |
901 | struct ciw *ciw; | |
902 | int rc; | |
903 | /* | |
904 | * sanity check: scan for RCD command in extended SenseID data | |
905 | * some devices do not support RCD | |
906 | */ | |
907 | ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); | |
908 | if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) | |
909 | return -EOPNOTSUPP; | |
910 | ||
911 | dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm); | |
912 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); | |
5a27e60d | 913 | set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); |
a4d26c6a | 914 | cqr->retries = 5; |
5915a873 | 915 | cqr->callback = read_conf_cb; |
a4d26c6a SW |
916 | rc = dasd_sleep_on_immediatly(cqr); |
917 | return rc; | |
17283b56 CH |
918 | } |
919 | ||
920 | static int dasd_eckd_read_conf_lpm(struct dasd_device *device, | |
921 | void **rcd_buffer, | |
922 | int *rcd_buffer_size, __u8 lpm) | |
923 | { | |
924 | struct ciw *ciw; | |
925 | char *rcd_buf = NULL; | |
926 | int ret; | |
927 | struct dasd_ccw_req *cqr; | |
928 | ||
929 | /* | |
a4d26c6a SW |
930 | * sanity check: scan for RCD command in extended SenseID data |
931 | * some devices do not support RCD | |
17283b56 CH |
932 | */ |
933 | ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); | |
a4d26c6a | 934 | if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) { |
17283b56 CH |
935 | ret = -EOPNOTSUPP; |
936 | goto out_error; | |
937 | } | |
a4d26c6a | 938 | rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA); |
17283b56 CH |
939 | if (!rcd_buf) { |
940 | ret = -ENOMEM; | |
941 | goto out_error; | |
942 | } | |
a4d26c6a SW |
943 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, |
944 | 0, /* use rcd_buf as data ara */ | |
945 | device); | |
17283b56 | 946 | if (IS_ERR(cqr)) { |
a4d26c6a SW |
947 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
948 | "Could not allocate RCD request"); | |
949 | ret = -ENOMEM; | |
17283b56 CH |
950 | goto out_error; |
951 | } | |
a4d26c6a | 952 | dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm); |
5915a873 | 953 | cqr->callback = read_conf_cb; |
17283b56 CH |
954 | ret = dasd_sleep_on(cqr); |
955 | /* | |
956 | * on success we update the user input parms | |
957 | */ | |
8e09f215 | 958 | dasd_sfree_request(cqr, cqr->memdev); |
17283b56 CH |
959 | if (ret) |
960 | goto out_error; | |
961 | ||
a4d26c6a | 962 | *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE; |
17283b56 CH |
963 | *rcd_buffer = rcd_buf; |
964 | return 0; | |
965 | out_error: | |
966 | kfree(rcd_buf); | |
967 | *rcd_buffer = NULL; | |
968 | *rcd_buffer_size = 0; | |
969 | return ret; | |
970 | } | |
971 | ||
4abb08c2 SW |
972 | static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) |
973 | { | |
974 | ||
975 | struct dasd_sneq *sneq; | |
976 | int i, count; | |
977 | ||
978 | private->ned = NULL; | |
979 | private->sneq = NULL; | |
980 | private->vdsneq = NULL; | |
981 | private->gneq = NULL; | |
982 | count = private->conf_len / sizeof(struct dasd_sneq); | |
983 | sneq = (struct dasd_sneq *)private->conf_data; | |
984 | for (i = 0; i < count; ++i) { | |
985 | if (sneq->flags.identifier == 1 && sneq->format == 1) | |
986 | private->sneq = sneq; | |
987 | else if (sneq->flags.identifier == 1 && sneq->format == 4) | |
988 | private->vdsneq = (struct vd_sneq *)sneq; | |
989 | else if (sneq->flags.identifier == 2) | |
990 | private->gneq = (struct dasd_gneq *)sneq; | |
991 | else if (sneq->flags.identifier == 3 && sneq->res1 == 1) | |
992 | private->ned = (struct dasd_ned *)sneq; | |
993 | sneq++; | |
994 | } | |
995 | if (!private->ned || !private->gneq) { | |
996 | private->ned = NULL; | |
997 | private->sneq = NULL; | |
998 | private->vdsneq = NULL; | |
999 | private->gneq = NULL; | |
1000 | return -EINVAL; | |
1001 | } | |
1002 | return 0; | |
1003 | ||
1004 | }; | |
1005 | ||
1006 | static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) | |
1007 | { | |
1008 | struct dasd_gneq *gneq; | |
1009 | int i, count, found; | |
1010 | ||
1011 | count = conf_len / sizeof(*gneq); | |
1012 | gneq = (struct dasd_gneq *)conf_data; | |
1013 | found = 0; | |
1014 | for (i = 0; i < count; ++i) { | |
1015 | if (gneq->flags.identifier == 2) { | |
1016 | found = 1; | |
1017 | break; | |
1018 | } | |
1019 | gneq++; | |
1020 | } | |
1021 | if (found) | |
1022 | return ((char *)gneq)[18] & 0x07; | |
1023 | else | |
1024 | return 0; | |
1025 | } | |
1026 | ||
1027 | static int dasd_eckd_read_conf(struct dasd_device *device) | |
1da177e4 LT |
1028 | { |
1029 | void *conf_data; | |
1030 | int conf_len, conf_data_saved; | |
55d3a85c | 1031 | int rc, path_err; |
a4d26c6a | 1032 | __u8 lpm, opm; |
b206181d | 1033 | struct dasd_eckd_private *private, path_private; |
a4d26c6a | 1034 | struct dasd_path *path_data; |
b206181d SH |
1035 | struct dasd_uid *uid; |
1036 | char print_path_uid[60], print_device_uid[60]; | |
1da177e4 LT |
1037 | |
1038 | private = (struct dasd_eckd_private *) device->private; | |
a4d26c6a SW |
1039 | path_data = &device->path_data; |
1040 | opm = ccw_device_get_path_mask(device->cdev); | |
1da177e4 | 1041 | conf_data_saved = 0; |
55d3a85c | 1042 | path_err = 0; |
1da177e4 LT |
1043 | /* get configuration data per operational path */ |
1044 | for (lpm = 0x80; lpm; lpm>>= 1) { | |
b206181d SH |
1045 | if (!(lpm & opm)) |
1046 | continue; | |
1047 | rc = dasd_eckd_read_conf_lpm(device, &conf_data, | |
1048 | &conf_len, lpm); | |
1049 | if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ | |
1050 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, | |
1051 | "Read configuration data returned " | |
1052 | "error %d", rc); | |
1053 | return rc; | |
1054 | } | |
1055 | if (conf_data == NULL) { | |
1056 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
1057 | "No configuration data " | |
1058 | "retrieved"); | |
1059 | /* no further analysis possible */ | |
1060 | path_data->opm |= lpm; | |
1061 | continue; /* no error */ | |
1062 | } | |
1063 | /* save first valid configuration data */ | |
1064 | if (!conf_data_saved) { | |
1065 | kfree(private->conf_data); | |
1066 | private->conf_data = conf_data; | |
1067 | private->conf_len = conf_len; | |
1068 | if (dasd_eckd_identify_conf_parts(private)) { | |
1069 | private->conf_data = NULL; | |
1070 | private->conf_len = 0; | |
1071 | kfree(conf_data); | |
1072 | continue; | |
1da177e4 | 1073 | } |
b206181d SH |
1074 | /* |
1075 | * build device UID that other path data | |
1076 | * can be compared to it | |
1077 | */ | |
1078 | dasd_eckd_generate_uid(device); | |
1079 | conf_data_saved++; | |
1080 | } else { | |
1081 | path_private.conf_data = conf_data; | |
1082 | path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; | |
1083 | if (dasd_eckd_identify_conf_parts( | |
1084 | &path_private)) { | |
1085 | path_private.conf_data = NULL; | |
1086 | path_private.conf_len = 0; | |
1087 | kfree(conf_data); | |
1088 | continue; | |
1da177e4 | 1089 | } |
b206181d SH |
1090 | |
1091 | if (dasd_eckd_compare_path_uid( | |
1092 | device, &path_private)) { | |
1093 | uid = &path_private.uid; | |
1094 | if (strlen(uid->vduit) > 0) | |
1095 | snprintf(print_path_uid, | |
1096 | sizeof(print_path_uid), | |
1097 | "%s.%s.%04x.%02x.%s", | |
1098 | uid->vendor, uid->serial, | |
1099 | uid->ssid, uid->real_unit_addr, | |
1100 | uid->vduit); | |
1101 | else | |
1102 | snprintf(print_path_uid, | |
1103 | sizeof(print_path_uid), | |
1104 | "%s.%s.%04x.%02x", | |
1105 | uid->vendor, uid->serial, | |
1106 | uid->ssid, | |
1107 | uid->real_unit_addr); | |
1108 | uid = &private->uid; | |
1109 | if (strlen(uid->vduit) > 0) | |
1110 | snprintf(print_device_uid, | |
1111 | sizeof(print_device_uid), | |
1112 | "%s.%s.%04x.%02x.%s", | |
1113 | uid->vendor, uid->serial, | |
1114 | uid->ssid, uid->real_unit_addr, | |
1115 | uid->vduit); | |
1116 | else | |
1117 | snprintf(print_device_uid, | |
1118 | sizeof(print_device_uid), | |
1119 | "%s.%s.%04x.%02x", | |
1120 | uid->vendor, uid->serial, | |
1121 | uid->ssid, | |
1122 | uid->real_unit_addr); | |
1123 | dev_err(&device->cdev->dev, | |
1124 | "Not all channel paths lead to " | |
1125 | "the same device, path %02X leads to " | |
1126 | "device %s instead of %s\n", lpm, | |
1127 | print_path_uid, print_device_uid); | |
55d3a85c SH |
1128 | path_err = -EINVAL; |
1129 | continue; | |
1da177e4 | 1130 | } |
b206181d SH |
1131 | |
1132 | path_private.conf_data = NULL; | |
1133 | path_private.conf_len = 0; | |
1134 | } | |
1135 | switch (dasd_eckd_path_access(conf_data, conf_len)) { | |
1136 | case 0x02: | |
1137 | path_data->npm |= lpm; | |
1138 | break; | |
1139 | case 0x03: | |
1140 | path_data->ppm |= lpm; | |
1141 | break; | |
1da177e4 | 1142 | } |
b206181d SH |
1143 | path_data->opm |= lpm; |
1144 | ||
1145 | if (conf_data != private->conf_data) | |
1146 | kfree(conf_data); | |
1da177e4 | 1147 | } |
b206181d | 1148 | |
55d3a85c | 1149 | return path_err; |
1da177e4 LT |
1150 | } |
1151 | ||
a4d26c6a SW |
1152 | static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) |
1153 | { | |
1154 | struct dasd_eckd_private *private; | |
1155 | int mdc; | |
1156 | u32 fcx_max_data; | |
1157 | ||
1158 | private = (struct dasd_eckd_private *) device->private; | |
1159 | if (private->fcx_max_data) { | |
1160 | mdc = ccw_device_get_mdc(device->cdev, lpm); | |
1161 | if ((mdc < 0)) { | |
1162 | dev_warn(&device->cdev->dev, | |
1163 | "Detecting the maximum data size for zHPF " | |
1164 | "requests failed (rc=%d) for a new path %x\n", | |
1165 | mdc, lpm); | |
1166 | return mdc; | |
1167 | } | |
1168 | fcx_max_data = mdc * FCX_MAX_DATA_FACTOR; | |
1169 | if (fcx_max_data < private->fcx_max_data) { | |
1170 | dev_warn(&device->cdev->dev, | |
1171 | "The maximum data size for zHPF requests %u " | |
1172 | "on a new path %x is below the active maximum " | |
1173 | "%u\n", fcx_max_data, lpm, | |
1174 | private->fcx_max_data); | |
1175 | return -EACCES; | |
1176 | } | |
1177 | } | |
1178 | return 0; | |
1179 | } | |
1180 | ||
b206181d SH |
1181 | static int rebuild_device_uid(struct dasd_device *device, |
1182 | struct path_verification_work_data *data) | |
1183 | { | |
1184 | struct dasd_eckd_private *private; | |
1185 | struct dasd_path *path_data; | |
1186 | __u8 lpm, opm; | |
1187 | int rc; | |
1188 | ||
1189 | rc = -ENODEV; | |
1190 | private = (struct dasd_eckd_private *) device->private; | |
1191 | path_data = &device->path_data; | |
1192 | opm = device->path_data.opm; | |
1193 | ||
1194 | for (lpm = 0x80; lpm; lpm >>= 1) { | |
1195 | if (!(lpm & opm)) | |
1196 | continue; | |
1197 | memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); | |
1198 | memset(&data->cqr, 0, sizeof(data->cqr)); | |
1199 | data->cqr.cpaddr = &data->ccw; | |
1200 | rc = dasd_eckd_read_conf_immediately(device, &data->cqr, | |
1201 | data->rcd_buffer, | |
1202 | lpm); | |
1203 | ||
1204 | if (rc) { | |
1205 | if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */ | |
1206 | continue; | |
1207 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, | |
1208 | "Read configuration data " | |
1209 | "returned error %d", rc); | |
1210 | break; | |
1211 | } | |
1212 | memcpy(private->conf_data, data->rcd_buffer, | |
1213 | DASD_ECKD_RCD_DATA_SIZE); | |
1214 | if (dasd_eckd_identify_conf_parts(private)) { | |
1215 | rc = -ENODEV; | |
1216 | } else /* first valid path is enough */ | |
1217 | break; | |
1218 | } | |
1219 | ||
1220 | if (!rc) | |
1221 | rc = dasd_eckd_generate_uid(device); | |
1222 | ||
1223 | return rc; | |
1224 | } | |
1225 | ||
a4d26c6a SW |
1226 | static void do_path_verification_work(struct work_struct *work) |
1227 | { | |
1228 | struct path_verification_work_data *data; | |
1229 | struct dasd_device *device; | |
b206181d SH |
1230 | struct dasd_eckd_private path_private; |
1231 | struct dasd_uid *uid; | |
1232 | __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; | |
a4d26c6a SW |
1233 | __u8 lpm, opm, npm, ppm, epm; |
1234 | unsigned long flags; | |
b206181d | 1235 | char print_uid[60]; |
a4d26c6a SW |
1236 | int rc; |
1237 | ||
1238 | data = container_of(work, struct path_verification_work_data, worker); | |
1239 | device = data->device; | |
1240 | ||
c8d1c0ff SH |
1241 | /* delay path verification until device was resumed */ |
1242 | if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { | |
1243 | schedule_work(work); | |
1244 | return; | |
1245 | } | |
1246 | ||
a4d26c6a SW |
1247 | opm = 0; |
1248 | npm = 0; | |
1249 | ppm = 0; | |
1250 | epm = 0; | |
1251 | for (lpm = 0x80; lpm; lpm >>= 1) { | |
b206181d SH |
1252 | if (!(lpm & data->tbvpm)) |
1253 | continue; | |
1254 | memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); | |
1255 | memset(&data->cqr, 0, sizeof(data->cqr)); | |
1256 | data->cqr.cpaddr = &data->ccw; | |
1257 | rc = dasd_eckd_read_conf_immediately(device, &data->cqr, | |
1258 | data->rcd_buffer, | |
1259 | lpm); | |
1260 | if (!rc) { | |
1261 | switch (dasd_eckd_path_access(data->rcd_buffer, | |
1262 | DASD_ECKD_RCD_DATA_SIZE) | |
1263 | ) { | |
1264 | case 0x02: | |
1265 | npm |= lpm; | |
1266 | break; | |
1267 | case 0x03: | |
1268 | ppm |= lpm; | |
1269 | break; | |
1270 | } | |
1271 | opm |= lpm; | |
1272 | } else if (rc == -EOPNOTSUPP) { | |
1273 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
1274 | "path verification: No configuration " | |
1275 | "data retrieved"); | |
1276 | opm |= lpm; | |
1277 | } else if (rc == -EAGAIN) { | |
1278 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
a4d26c6a SW |
1279 | "path verification: device is stopped," |
1280 | " try again later"); | |
b206181d SH |
1281 | epm |= lpm; |
1282 | } else { | |
1283 | dev_warn(&device->cdev->dev, | |
1284 | "Reading device feature codes failed " | |
1285 | "(rc=%d) for new path %x\n", rc, lpm); | |
1286 | continue; | |
1287 | } | |
1288 | if (verify_fcx_max_data(device, lpm)) { | |
1289 | opm &= ~lpm; | |
1290 | npm &= ~lpm; | |
1291 | ppm &= ~lpm; | |
1292 | continue; | |
1293 | } | |
1294 | ||
1295 | /* | |
1296 | * save conf_data for comparison after | |
1297 | * rebuild_device_uid may have changed | |
1298 | * the original data | |
1299 | */ | |
1300 | memcpy(&path_rcd_buf, data->rcd_buffer, | |
1301 | DASD_ECKD_RCD_DATA_SIZE); | |
1302 | path_private.conf_data = (void *) &path_rcd_buf; | |
1303 | path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; | |
1304 | if (dasd_eckd_identify_conf_parts(&path_private)) { | |
1305 | path_private.conf_data = NULL; | |
1306 | path_private.conf_len = 0; | |
1307 | continue; | |
1308 | } | |
1309 | ||
1310 | /* | |
1311 | * compare path UID with device UID only if at least | |
1312 | * one valid path is left | |
1313 | * in other case the device UID may have changed and | |
1314 | * the first working path UID will be used as device UID | |
1315 | */ | |
1316 | if (device->path_data.opm && | |
1317 | dasd_eckd_compare_path_uid(device, &path_private)) { | |
1318 | /* | |
1319 | * the comparison was not successful | |
1320 | * rebuild the device UID with at least one | |
1321 | * known path in case a z/VM hyperswap command | |
1322 | * has changed the device | |
1323 | * | |
1324 | * after this compare again | |
1325 | * | |
1326 | * if either the rebuild or the recompare fails | |
1327 | * the path can not be used | |
1328 | */ | |
1329 | if (rebuild_device_uid(device, data) || | |
1330 | dasd_eckd_compare_path_uid( | |
1331 | device, &path_private)) { | |
1332 | uid = &path_private.uid; | |
1333 | if (strlen(uid->vduit) > 0) | |
1334 | snprintf(print_uid, sizeof(print_uid), | |
1335 | "%s.%s.%04x.%02x.%s", | |
1336 | uid->vendor, uid->serial, | |
1337 | uid->ssid, uid->real_unit_addr, | |
1338 | uid->vduit); | |
1339 | else | |
1340 | snprintf(print_uid, sizeof(print_uid), | |
1341 | "%s.%s.%04x.%02x", | |
1342 | uid->vendor, uid->serial, | |
1343 | uid->ssid, | |
1344 | uid->real_unit_addr); | |
1345 | dev_err(&device->cdev->dev, | |
1346 | "The newly added channel path %02X " | |
1347 | "will not be used because it leads " | |
1348 | "to a different device %s\n", | |
1349 | lpm, print_uid); | |
a4d26c6a SW |
1350 | opm &= ~lpm; |
1351 | npm &= ~lpm; | |
1352 | ppm &= ~lpm; | |
b206181d | 1353 | continue; |
a4d26c6a SW |
1354 | } |
1355 | } | |
b206181d SH |
1356 | |
1357 | /* | |
1358 | * There is a small chance that a path is lost again between | |
1359 | * above path verification and the following modification of | |
1360 | * the device opm mask. We could avoid that race here by using | |
1361 | * yet another path mask, but we rather deal with this unlikely | |
1362 | * situation in dasd_start_IO. | |
1363 | */ | |
1364 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); | |
1365 | if (!device->path_data.opm && opm) { | |
1366 | device->path_data.opm = opm; | |
1367 | dasd_generic_path_operational(device); | |
1368 | } else | |
1369 | device->path_data.opm |= opm; | |
1370 | device->path_data.npm |= npm; | |
1371 | device->path_data.ppm |= ppm; | |
1372 | device->path_data.tbvpm |= epm; | |
1373 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); | |
a4d26c6a | 1374 | } |
a4d26c6a SW |
1375 | |
1376 | dasd_put_device(device); | |
1377 | if (data->isglobal) | |
1378 | mutex_unlock(&dasd_path_verification_mutex); | |
1379 | else | |
1380 | kfree(data); | |
1381 | } | |
1382 | ||
1383 | static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm) | |
1384 | { | |
1385 | struct path_verification_work_data *data; | |
1386 | ||
1387 | data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); | |
1388 | if (!data) { | |
1389 | if (mutex_trylock(&dasd_path_verification_mutex)) { | |
1390 | data = path_verification_worker; | |
1391 | data->isglobal = 1; | |
1392 | } else | |
1393 | return -ENOMEM; | |
1394 | } else { | |
1395 | memset(data, 0, sizeof(*data)); | |
1396 | data->isglobal = 0; | |
1397 | } | |
1398 | INIT_WORK(&data->worker, do_path_verification_work); | |
1399 | dasd_get_device(device); | |
1400 | data->device = device; | |
1401 | data->tbvpm = lpm; | |
1402 | schedule_work(&data->worker); | |
1403 | return 0; | |
1404 | } | |
1405 | ||
8e09f215 SW |
1406 | static int dasd_eckd_read_features(struct dasd_device *device) |
1407 | { | |
1408 | struct dasd_psf_prssd_data *prssdp; | |
1409 | struct dasd_rssd_features *features; | |
1410 | struct dasd_ccw_req *cqr; | |
1411 | struct ccw1 *ccw; | |
1412 | int rc; | |
1413 | struct dasd_eckd_private *private; | |
1414 | ||
1415 | private = (struct dasd_eckd_private *) device->private; | |
68d1e5f0 | 1416 | memset(&private->features, 0, sizeof(struct dasd_rssd_features)); |
68b781fe | 1417 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, |
8e09f215 SW |
1418 | (sizeof(struct dasd_psf_prssd_data) + |
1419 | sizeof(struct dasd_rssd_features)), | |
1420 | device); | |
1421 | if (IS_ERR(cqr)) { | |
b8ed5dd5 SH |
1422 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " |
1423 | "allocate initialization request"); | |
8e09f215 SW |
1424 | return PTR_ERR(cqr); |
1425 | } | |
1426 | cqr->startdev = device; | |
1427 | cqr->memdev = device; | |
1428 | cqr->block = NULL; | |
eb6e199b | 1429 | cqr->retries = 256; |
8e09f215 SW |
1430 | cqr->expires = 10 * HZ; |
1431 | ||
1432 | /* Prepare for Read Subsystem Data */ | |
1433 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
1434 | memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); | |
1435 | prssdp->order = PSF_ORDER_PRSSD; | |
1436 | prssdp->suborder = 0x41; /* Read Feature Codes */ | |
1437 | /* all other bytes of prssdp must be zero */ | |
1438 | ||
1439 | ccw = cqr->cpaddr; | |
1440 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
1441 | ccw->count = sizeof(struct dasd_psf_prssd_data); | |
1442 | ccw->flags |= CCW_FLAG_CC; | |
1443 | ccw->cda = (__u32)(addr_t) prssdp; | |
1444 | ||
1445 | /* Read Subsystem Data - feature codes */ | |
1446 | features = (struct dasd_rssd_features *) (prssdp + 1); | |
1447 | memset(features, 0, sizeof(struct dasd_rssd_features)); | |
1448 | ||
1449 | ccw++; | |
1450 | ccw->cmd_code = DASD_ECKD_CCW_RSSD; | |
1451 | ccw->count = sizeof(struct dasd_rssd_features); | |
1452 | ccw->cda = (__u32)(addr_t) features; | |
1453 | ||
1aae0560 | 1454 | cqr->buildclk = get_tod_clock(); |
8e09f215 SW |
1455 | cqr->status = DASD_CQR_FILLED; |
1456 | rc = dasd_sleep_on(cqr); | |
1457 | if (rc == 0) { | |
1458 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
1459 | features = (struct dasd_rssd_features *) (prssdp + 1); | |
1460 | memcpy(&private->features, features, | |
1461 | sizeof(struct dasd_rssd_features)); | |
68d1e5f0 SW |
1462 | } else |
1463 | dev_warn(&device->cdev->dev, "Reading device feature codes" | |
1464 | " failed with rc=%d\n", rc); | |
8e09f215 SW |
1465 | dasd_sfree_request(cqr, cqr->memdev); |
1466 | return rc; | |
1467 | } | |
1468 | ||
1469 | ||
40545573 HH |
1470 | /* |
1471 | * Build CP for Perform Subsystem Function - SSC. | |
1472 | */ | |
f3eb5384 SW |
1473 | static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, |
1474 | int enable_pav) | |
40545573 | 1475 | { |
8e09f215 SW |
1476 | struct dasd_ccw_req *cqr; |
1477 | struct dasd_psf_ssc_data *psf_ssc_data; | |
1478 | struct ccw1 *ccw; | |
40545573 | 1479 | |
68b781fe | 1480 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , |
40545573 HH |
1481 | sizeof(struct dasd_psf_ssc_data), |
1482 | device); | |
1483 | ||
8e09f215 | 1484 | if (IS_ERR(cqr)) { |
fc19f381 | 1485 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
40545573 | 1486 | "Could not allocate PSF-SSC request"); |
8e09f215 SW |
1487 | return cqr; |
1488 | } | |
1489 | psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; | |
1490 | psf_ssc_data->order = PSF_ORDER_SSC; | |
626350b6 | 1491 | psf_ssc_data->suborder = 0xc0; |
f3eb5384 | 1492 | if (enable_pav) { |
626350b6 | 1493 | psf_ssc_data->suborder |= 0x08; |
f3eb5384 SW |
1494 | psf_ssc_data->reserved[0] = 0x88; |
1495 | } | |
8e09f215 SW |
1496 | ccw = cqr->cpaddr; |
1497 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
1498 | ccw->cda = (__u32)(addr_t)psf_ssc_data; | |
1499 | ccw->count = 66; | |
1500 | ||
1501 | cqr->startdev = device; | |
1502 | cqr->memdev = device; | |
1503 | cqr->block = NULL; | |
eb6e199b | 1504 | cqr->retries = 256; |
8e09f215 | 1505 | cqr->expires = 10*HZ; |
1aae0560 | 1506 | cqr->buildclk = get_tod_clock(); |
8e09f215 SW |
1507 | cqr->status = DASD_CQR_FILLED; |
1508 | return cqr; | |
40545573 HH |
1509 | } |
1510 | ||
1511 | /* | |
1512 | * Perform Subsystem Function. | |
1513 | * It is necessary to trigger CIO for channel revalidation since this | |
1514 | * call might change behaviour of DASD devices. | |
1515 | */ | |
1516 | static int | |
12d7b107 SH |
1517 | dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav, |
1518 | unsigned long flags) | |
40545573 | 1519 | { |
8e09f215 SW |
1520 | struct dasd_ccw_req *cqr; |
1521 | int rc; | |
1522 | ||
f3eb5384 | 1523 | cqr = dasd_eckd_build_psf_ssc(device, enable_pav); |
8e09f215 SW |
1524 | if (IS_ERR(cqr)) |
1525 | return PTR_ERR(cqr); | |
1526 | ||
12d7b107 SH |
1527 | /* |
1528 | * set flags e.g. turn on failfast, to prevent blocking | |
1529 | * the calling function should handle failed requests | |
1530 | */ | |
1531 | cqr->flags |= flags; | |
1532 | ||
8e09f215 SW |
1533 | rc = dasd_sleep_on(cqr); |
1534 | if (!rc) | |
1535 | /* trigger CIO to reprobe devices */ | |
1536 | css_schedule_reprobe(); | |
12d7b107 SH |
1537 | else if (cqr->intrc == -EAGAIN) |
1538 | rc = -EAGAIN; | |
1539 | ||
8e09f215 SW |
1540 | dasd_sfree_request(cqr, cqr->memdev); |
1541 | return rc; | |
40545573 HH |
1542 | } |
1543 | ||
1544 | /* | |
1545 | * Valide storage server of current device. | |
1546 | */ | |
12d7b107 SH |
1547 | static int dasd_eckd_validate_server(struct dasd_device *device, |
1548 | unsigned long flags) | |
40545573 HH |
1549 | { |
1550 | int rc; | |
8e09f215 | 1551 | struct dasd_eckd_private *private; |
f3eb5384 | 1552 | int enable_pav; |
40545573 | 1553 | |
f9f8d02f SH |
1554 | private = (struct dasd_eckd_private *) device->private; |
1555 | if (private->uid.type == UA_BASE_PAV_ALIAS || | |
1556 | private->uid.type == UA_HYPER_PAV_ALIAS) | |
12d7b107 | 1557 | return 0; |
40545573 | 1558 | if (dasd_nopav || MACHINE_IS_VM) |
f3eb5384 SW |
1559 | enable_pav = 0; |
1560 | else | |
1561 | enable_pav = 1; | |
12d7b107 | 1562 | rc = dasd_eckd_psf_ssc(device, enable_pav, flags); |
eb6e199b | 1563 | |
8e79a441 HH |
1564 | /* may be requested feature is not available on server, |
1565 | * therefore just report error and go ahead */ | |
b8ed5dd5 SH |
1566 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " |
1567 | "returned rc=%d", private->uid.ssid, rc); | |
12d7b107 | 1568 | return rc; |
40545573 HH |
1569 | } |
1570 | ||
f1633031 SH |
1571 | /* |
1572 | * worker to do a validate server in case of a lost pathgroup | |
1573 | */ | |
1574 | static void dasd_eckd_do_validate_server(struct work_struct *work) | |
1575 | { | |
1576 | struct dasd_device *device = container_of(work, struct dasd_device, | |
1577 | kick_validate); | |
ea4da6ea SH |
1578 | unsigned long flags = 0; |
1579 | ||
1580 | set_bit(DASD_CQR_FLAGS_FAILFAST, &flags); | |
1581 | if (dasd_eckd_validate_server(device, flags) | |
12d7b107 SH |
1582 | == -EAGAIN) { |
1583 | /* schedule worker again if failed */ | |
1584 | schedule_work(&device->kick_validate); | |
1585 | return; | |
1586 | } | |
1587 | ||
f1633031 SH |
1588 | dasd_put_device(device); |
1589 | } | |
1590 | ||
1591 | static void dasd_eckd_kick_validate_server(struct dasd_device *device) | |
1592 | { | |
1593 | dasd_get_device(device); | |
25e2cf1c SH |
1594 | /* exit if device not online or in offline processing */ |
1595 | if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || | |
1596 | device->state < DASD_STATE_ONLINE) { | |
1597 | dasd_put_device(device); | |
1598 | return; | |
1599 | } | |
f1633031 SH |
1600 | /* queue call to do_validate_server to the kernel event daemon. */ |
1601 | schedule_work(&device->kick_validate); | |
1602 | } | |
1603 | ||
ef19298b SW |
1604 | static u32 get_fcx_max_data(struct dasd_device *device) |
1605 | { | |
1606 | #if defined(CONFIG_64BIT) | |
1607 | int tpm, mdc; | |
1608 | int fcx_in_css, fcx_in_gneq, fcx_in_features; | |
1609 | struct dasd_eckd_private *private; | |
1610 | ||
1611 | if (dasd_nofcx) | |
1612 | return 0; | |
1613 | /* is transport mode supported? */ | |
1614 | private = (struct dasd_eckd_private *) device->private; | |
1615 | fcx_in_css = css_general_characteristics.fcx; | |
1616 | fcx_in_gneq = private->gneq->reserved2[7] & 0x04; | |
1617 | fcx_in_features = private->features.feature[40] & 0x80; | |
1618 | tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; | |
1619 | ||
1620 | if (!tpm) | |
1621 | return 0; | |
1622 | ||
1623 | mdc = ccw_device_get_mdc(device->cdev, 0); | |
1624 | if (mdc < 0) { | |
1625 | dev_warn(&device->cdev->dev, "Detecting the maximum supported" | |
1626 | " data size for zHPF requests failed\n"); | |
1627 | return 0; | |
1628 | } else | |
1629 | return mdc * FCX_MAX_DATA_FACTOR; | |
1630 | #else | |
1631 | return 0; | |
1632 | #endif | |
1633 | } | |
1634 | ||
3d052595 HH |
1635 | /* |
1636 | * Check device characteristics. | |
1637 | * If the device is accessible using ECKD discipline, the device is enabled. | |
1638 | */ | |
1da177e4 LT |
1639 | static int |
1640 | dasd_eckd_check_characteristics(struct dasd_device *device) | |
1641 | { | |
1642 | struct dasd_eckd_private *private; | |
8e09f215 | 1643 | struct dasd_block *block; |
2dedf0d9 | 1644 | struct dasd_uid temp_uid; |
f9f8d02f | 1645 | int rc, i; |
33b62a30 | 1646 | int readonly; |
7c8faa86 | 1647 | unsigned long value; |
1da177e4 | 1648 | |
f1633031 SH |
1649 | /* setup work queue for validate server*/ |
1650 | INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); | |
1651 | ||
454e1fa1 PO |
1652 | if (!ccw_device_is_pathgroup(device->cdev)) { |
1653 | dev_warn(&device->cdev->dev, | |
1654 | "A channel path group could not be established\n"); | |
1655 | return -EIO; | |
1656 | } | |
1657 | if (!ccw_device_is_multipath(device->cdev)) { | |
1658 | dev_info(&device->cdev->dev, | |
1659 | "The DASD is not operating in multipath mode\n"); | |
1660 | } | |
1da177e4 | 1661 | private = (struct dasd_eckd_private *) device->private; |
92636b15 SO |
1662 | if (!private) { |
1663 | private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); | |
1664 | if (!private) { | |
fc19f381 SH |
1665 | dev_warn(&device->cdev->dev, |
1666 | "Allocating memory for private DASD data " | |
1667 | "failed\n"); | |
1da177e4 LT |
1668 | return -ENOMEM; |
1669 | } | |
1da177e4 | 1670 | device->private = (void *) private; |
92636b15 SO |
1671 | } else { |
1672 | memset(private, 0, sizeof(*private)); | |
1da177e4 LT |
1673 | } |
1674 | /* Invalidate status of initial analysis. */ | |
1675 | private->init_cqr_status = -1; | |
1676 | /* Set default cache operations. */ | |
1677 | private->attrib.operation = DASD_NORMAL_CACHE; | |
1678 | private->attrib.nr_cyl = 0; | |
1679 | ||
40545573 HH |
1680 | /* Read Configuration Data */ |
1681 | rc = dasd_eckd_read_conf(device); | |
1682 | if (rc) | |
8e09f215 | 1683 | goto out_err1; |
40545573 | 1684 | |
7c8faa86 SH |
1685 | /* set default timeout */ |
1686 | device->default_expires = DASD_EXPIRES; | |
1f1ee9ad HR |
1687 | /* set default retry count */ |
1688 | device->default_retries = DASD_RETRIES; | |
1689 | ||
7c8faa86 SH |
1690 | if (private->gneq) { |
1691 | value = 1; | |
1692 | for (i = 0; i < private->gneq->timeout.value; i++) | |
1693 | value = 10 * value; | |
1694 | value = value * private->gneq->timeout.number; | |
1695 | /* do not accept useless values */ | |
1696 | if (value != 0 && value <= DASD_EXPIRES_MAX) | |
1697 | device->default_expires = value; | |
1698 | } | |
1699 | ||
2dedf0d9 SH |
1700 | dasd_eckd_get_uid(device, &temp_uid); |
1701 | if (temp_uid.type == UA_BASE_DEVICE) { | |
8e09f215 SW |
1702 | block = dasd_alloc_block(); |
1703 | if (IS_ERR(block)) { | |
b8ed5dd5 SH |
1704 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", |
1705 | "could not allocate dasd " | |
1706 | "block structure"); | |
8e09f215 SW |
1707 | rc = PTR_ERR(block); |
1708 | goto out_err1; | |
1709 | } | |
1710 | device->block = block; | |
1711 | block->base = device; | |
1712 | } | |
1713 | ||
f9f8d02f SH |
1714 | /* register lcu with alias handling, enable PAV */ |
1715 | rc = dasd_alias_make_device_known_to_lcu(device); | |
1716 | if (rc) | |
8e09f215 | 1717 | goto out_err2; |
f9f8d02f | 1718 | |
12d7b107 | 1719 | dasd_eckd_validate_server(device, 0); |
f4ac1d02 SW |
1720 | |
1721 | /* device may report different configuration data after LCU setup */ | |
1722 | rc = dasd_eckd_read_conf(device); | |
1723 | if (rc) | |
1724 | goto out_err3; | |
8e09f215 SW |
1725 | |
1726 | /* Read Feature Codes */ | |
68d1e5f0 | 1727 | dasd_eckd_read_features(device); |
40545573 | 1728 | |
1da177e4 | 1729 | /* Read Device Characteristics */ |
68b781fe SH |
1730 | rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, |
1731 | &private->rdc_data, 64); | |
8e09f215 | 1732 | if (rc) { |
b8ed5dd5 SH |
1733 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, |
1734 | "Read device characteristic failed, rc=%d", rc); | |
8e09f215 SW |
1735 | goto out_err3; |
1736 | } | |
34cd551a SH |
1737 | |
1738 | if ((device->features & DASD_FEATURE_USERAW) && | |
1739 | !(private->rdc_data.facilities.RT_in_LR)) { | |
1740 | dev_err(&device->cdev->dev, "The storage server does not " | |
1741 | "support raw-track access\n"); | |
1742 | rc = -EINVAL; | |
1743 | goto out_err3; | |
1744 | } | |
1745 | ||
817f2c84 | 1746 | /* find the valid cylinder size */ |
b44b0ab3 SW |
1747 | if (private->rdc_data.no_cyl == LV_COMPAT_CYL && |
1748 | private->rdc_data.long_no_cyl) | |
1749 | private->real_cyl = private->rdc_data.long_no_cyl; | |
1750 | else | |
1751 | private->real_cyl = private->rdc_data.no_cyl; | |
1752 | ||
ef19298b SW |
1753 | private->fcx_max_data = get_fcx_max_data(device); |
1754 | ||
33b62a30 SW |
1755 | readonly = dasd_device_is_ro(device); |
1756 | if (readonly) | |
1757 | set_bit(DASD_FLAG_DEVICE_RO, &device->flags); | |
1758 | ||
fc19f381 | 1759 | dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " |
33b62a30 | 1760 | "with %d cylinders, %d heads, %d sectors%s\n", |
fc19f381 SH |
1761 | private->rdc_data.dev_type, |
1762 | private->rdc_data.dev_model, | |
1763 | private->rdc_data.cu_type, | |
1764 | private->rdc_data.cu_model.model, | |
92636b15 | 1765 | private->real_cyl, |
fc19f381 | 1766 | private->rdc_data.trk_per_cyl, |
33b62a30 SW |
1767 | private->rdc_data.sec_per_trk, |
1768 | readonly ? ", read-only device" : ""); | |
8e09f215 SW |
1769 | return 0; |
1770 | ||
1771 | out_err3: | |
1772 | dasd_alias_disconnect_device_from_lcu(device); | |
1773 | out_err2: | |
1774 | dasd_free_block(device->block); | |
1775 | device->block = NULL; | |
1776 | out_err1: | |
4abb08c2 | 1777 | kfree(private->conf_data); |
8e09f215 SW |
1778 | kfree(device->private); |
1779 | device->private = NULL; | |
3d052595 | 1780 | return rc; |
1da177e4 LT |
1781 | } |
1782 | ||
8e09f215 SW |
1783 | static void dasd_eckd_uncheck_device(struct dasd_device *device) |
1784 | { | |
4abb08c2 SW |
1785 | struct dasd_eckd_private *private; |
1786 | ||
1787 | private = (struct dasd_eckd_private *) device->private; | |
8e09f215 | 1788 | dasd_alias_disconnect_device_from_lcu(device); |
4abb08c2 SW |
1789 | private->ned = NULL; |
1790 | private->sneq = NULL; | |
1791 | private->vdsneq = NULL; | |
1792 | private->gneq = NULL; | |
1793 | private->conf_len = 0; | |
1794 | kfree(private->conf_data); | |
1795 | private->conf_data = NULL; | |
8e09f215 SW |
1796 | } |
1797 | ||
1da177e4 LT |
1798 | static struct dasd_ccw_req * |
1799 | dasd_eckd_analysis_ccw(struct dasd_device *device) | |
1800 | { | |
1801 | struct dasd_eckd_private *private; | |
1802 | struct eckd_count *count_data; | |
1803 | struct LO_eckd_data *LO_data; | |
1804 | struct dasd_ccw_req *cqr; | |
1805 | struct ccw1 *ccw; | |
1806 | int cplength, datasize; | |
1807 | int i; | |
1808 | ||
1809 | private = (struct dasd_eckd_private *) device->private; | |
1810 | ||
1811 | cplength = 8; | |
1812 | datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); | |
68b781fe | 1813 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); |
1da177e4 LT |
1814 | if (IS_ERR(cqr)) |
1815 | return cqr; | |
1816 | ccw = cqr->cpaddr; | |
1817 | /* Define extent for the first 3 tracks. */ | |
1818 | define_extent(ccw++, cqr->data, 0, 2, | |
1819 | DASD_ECKD_CCW_READ_COUNT, device); | |
8e09f215 | 1820 | LO_data = cqr->data + sizeof(struct DE_eckd_data); |
1da177e4 LT |
1821 | /* Locate record for the first 4 records on track 0. */ |
1822 | ccw[-1].flags |= CCW_FLAG_CC; | |
1823 | locate_record(ccw++, LO_data++, 0, 0, 4, | |
1824 | DASD_ECKD_CCW_READ_COUNT, device, 0); | |
1825 | ||
1826 | count_data = private->count_area; | |
1827 | for (i = 0; i < 4; i++) { | |
1828 | ccw[-1].flags |= CCW_FLAG_CC; | |
1829 | ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; | |
1830 | ccw->flags = 0; | |
1831 | ccw->count = 8; | |
1832 | ccw->cda = (__u32)(addr_t) count_data; | |
1833 | ccw++; | |
1834 | count_data++; | |
1835 | } | |
1836 | ||
1837 | /* Locate record for the first record on track 2. */ | |
1838 | ccw[-1].flags |= CCW_FLAG_CC; | |
1839 | locate_record(ccw++, LO_data++, 2, 0, 1, | |
1840 | DASD_ECKD_CCW_READ_COUNT, device, 0); | |
1841 | /* Read count ccw. */ | |
1842 | ccw[-1].flags |= CCW_FLAG_CC; | |
1843 | ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; | |
1844 | ccw->flags = 0; | |
1845 | ccw->count = 8; | |
1846 | ccw->cda = (__u32)(addr_t) count_data; | |
1847 | ||
8e09f215 SW |
1848 | cqr->block = NULL; |
1849 | cqr->startdev = device; | |
1850 | cqr->memdev = device; | |
eb6e199b | 1851 | cqr->retries = 255; |
1aae0560 | 1852 | cqr->buildclk = get_tod_clock(); |
1da177e4 LT |
1853 | cqr->status = DASD_CQR_FILLED; |
1854 | return cqr; | |
1855 | } | |
1856 | ||
eb6e199b SW |
1857 | /* differentiate between 'no record found' and any other error */ |
1858 | static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) | |
1859 | { | |
1860 | char *sense; | |
1861 | if (init_cqr->status == DASD_CQR_DONE) | |
1862 | return INIT_CQR_OK; | |
1863 | else if (init_cqr->status == DASD_CQR_NEED_ERP || | |
1864 | init_cqr->status == DASD_CQR_FAILED) { | |
1865 | sense = dasd_get_sense(&init_cqr->irb); | |
1866 | if (sense && (sense[1] & SNS1_NO_REC_FOUND)) | |
1867 | return INIT_CQR_UNFORMATTED; | |
1868 | else | |
1869 | return INIT_CQR_ERROR; | |
1870 | } else | |
1871 | return INIT_CQR_ERROR; | |
1872 | } | |
1873 | ||
1da177e4 LT |
1874 | /* |
1875 | * This is the callback function for the init_analysis cqr. It saves | |
1876 | * the status of the initial analysis ccw before it frees it and kicks | |
1877 | * the device to continue the startup sequence. This will call | |
1878 | * dasd_eckd_do_analysis again (if the devices has not been marked | |
1879 | * for deletion in the meantime). | |
1880 | */ | |
eb6e199b SW |
1881 | static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, |
1882 | void *data) | |
1da177e4 LT |
1883 | { |
1884 | struct dasd_eckd_private *private; | |
1885 | struct dasd_device *device; | |
1886 | ||
8e09f215 | 1887 | device = init_cqr->startdev; |
1da177e4 | 1888 | private = (struct dasd_eckd_private *) device->private; |
eb6e199b | 1889 | private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); |
1da177e4 LT |
1890 | dasd_sfree_request(init_cqr, device); |
1891 | dasd_kick_device(device); | |
1892 | } | |
1893 | ||
eb6e199b | 1894 | static int dasd_eckd_start_analysis(struct dasd_block *block) |
1da177e4 | 1895 | { |
1da177e4 LT |
1896 | struct dasd_ccw_req *init_cqr; |
1897 | ||
8e09f215 | 1898 | init_cqr = dasd_eckd_analysis_ccw(block->base); |
1da177e4 LT |
1899 | if (IS_ERR(init_cqr)) |
1900 | return PTR_ERR(init_cqr); | |
1901 | init_cqr->callback = dasd_eckd_analysis_callback; | |
1902 | init_cqr->callback_data = NULL; | |
1903 | init_cqr->expires = 5*HZ; | |
eb6e199b SW |
1904 | /* first try without ERP, so we can later handle unformatted |
1905 | * devices as special case | |
1906 | */ | |
1907 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); | |
1908 | init_cqr->retries = 0; | |
1da177e4 LT |
1909 | dasd_add_request_head(init_cqr); |
1910 | return -EAGAIN; | |
1911 | } | |
1912 | ||
eb6e199b | 1913 | static int dasd_eckd_end_analysis(struct dasd_block *block) |
1da177e4 | 1914 | { |
8e09f215 | 1915 | struct dasd_device *device; |
1da177e4 LT |
1916 | struct dasd_eckd_private *private; |
1917 | struct eckd_count *count_area; | |
1918 | unsigned int sb, blk_per_trk; | |
1919 | int status, i; | |
eb6e199b | 1920 | struct dasd_ccw_req *init_cqr; |
1da177e4 | 1921 | |
8e09f215 | 1922 | device = block->base; |
1da177e4 LT |
1923 | private = (struct dasd_eckd_private *) device->private; |
1924 | status = private->init_cqr_status; | |
1925 | private->init_cqr_status = -1; | |
eb6e199b SW |
1926 | if (status == INIT_CQR_ERROR) { |
1927 | /* try again, this time with full ERP */ | |
1928 | init_cqr = dasd_eckd_analysis_ccw(device); | |
1929 | dasd_sleep_on(init_cqr); | |
1930 | status = dasd_eckd_analysis_evaluation(init_cqr); | |
1931 | dasd_sfree_request(init_cqr, device); | |
1932 | } | |
1933 | ||
e4dbb0f2 SH |
1934 | if (device->features & DASD_FEATURE_USERAW) { |
1935 | block->bp_block = DASD_RAW_BLOCKSIZE; | |
1936 | blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; | |
1937 | block->s2b_shift = 3; | |
1938 | goto raw; | |
1939 | } | |
1940 | ||
eb6e199b SW |
1941 | if (status == INIT_CQR_UNFORMATTED) { |
1942 | dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); | |
1da177e4 | 1943 | return -EMEDIUMTYPE; |
eb6e199b SW |
1944 | } else if (status == INIT_CQR_ERROR) { |
1945 | dev_err(&device->cdev->dev, | |
1946 | "Detecting the DASD disk layout failed because " | |
1947 | "of an I/O error\n"); | |
1948 | return -EIO; | |
1da177e4 LT |
1949 | } |
1950 | ||
1951 | private->uses_cdl = 1; | |
1da177e4 LT |
1952 | /* Check Track 0 for Compatible Disk Layout */ |
1953 | count_area = NULL; | |
1954 | for (i = 0; i < 3; i++) { | |
1955 | if (private->count_area[i].kl != 4 || | |
3bc9fef9 SH |
1956 | private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 || |
1957 | private->count_area[i].cyl != 0 || | |
1958 | private->count_area[i].head != count_area_head[i] || | |
1959 | private->count_area[i].record != count_area_rec[i]) { | |
1da177e4 LT |
1960 | private->uses_cdl = 0; |
1961 | break; | |
1962 | } | |
1963 | } | |
1964 | if (i == 3) | |
1965 | count_area = &private->count_area[4]; | |
1966 | ||
1967 | if (private->uses_cdl == 0) { | |
1968 | for (i = 0; i < 5; i++) { | |
1969 | if ((private->count_area[i].kl != 0) || | |
1970 | (private->count_area[i].dl != | |
3bc9fef9 SH |
1971 | private->count_area[0].dl) || |
1972 | private->count_area[i].cyl != 0 || | |
1973 | private->count_area[i].head != count_area_head[i] || | |
1974 | private->count_area[i].record != count_area_rec[i]) | |
1da177e4 LT |
1975 | break; |
1976 | } | |
1977 | if (i == 5) | |
1978 | count_area = &private->count_area[0]; | |
1979 | } else { | |
1980 | if (private->count_area[3].record == 1) | |
fc19f381 SH |
1981 | dev_warn(&device->cdev->dev, |
1982 | "Track 0 has no records following the VTOC\n"); | |
1da177e4 | 1983 | } |
e4dbb0f2 | 1984 | |
1da177e4 LT |
1985 | if (count_area != NULL && count_area->kl == 0) { |
1986 | /* we found notthing violating our disk layout */ | |
1987 | if (dasd_check_blocksize(count_area->dl) == 0) | |
8e09f215 | 1988 | block->bp_block = count_area->dl; |
1da177e4 | 1989 | } |
8e09f215 | 1990 | if (block->bp_block == 0) { |
fc19f381 SH |
1991 | dev_warn(&device->cdev->dev, |
1992 | "The disk layout of the DASD is not supported\n"); | |
1da177e4 LT |
1993 | return -EMEDIUMTYPE; |
1994 | } | |
8e09f215 SW |
1995 | block->s2b_shift = 0; /* bits to shift 512 to get a block */ |
1996 | for (sb = 512; sb < block->bp_block; sb = sb << 1) | |
1997 | block->s2b_shift++; | |
1da177e4 | 1998 | |
8e09f215 | 1999 | blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); |
e4dbb0f2 SH |
2000 | |
2001 | raw: | |
b44b0ab3 | 2002 | block->blocks = (private->real_cyl * |
1da177e4 LT |
2003 | private->rdc_data.trk_per_cyl * |
2004 | blk_per_trk); | |
2005 | ||
fc19f381 SH |
2006 | dev_info(&device->cdev->dev, |
2007 | "DASD with %d KB/block, %d KB total size, %d KB/track, " | |
2008 | "%s\n", (block->bp_block >> 10), | |
2009 | ((private->real_cyl * | |
2010 | private->rdc_data.trk_per_cyl * | |
2011 | blk_per_trk * (block->bp_block >> 9)) >> 1), | |
2012 | ((blk_per_trk * block->bp_block) >> 10), | |
2013 | private->uses_cdl ? | |
2014 | "compatible disk layout" : "linux disk layout"); | |
1da177e4 LT |
2015 | |
2016 | return 0; | |
2017 | } | |
2018 | ||
8e09f215 | 2019 | static int dasd_eckd_do_analysis(struct dasd_block *block) |
1da177e4 LT |
2020 | { |
2021 | struct dasd_eckd_private *private; | |
2022 | ||
8e09f215 | 2023 | private = (struct dasd_eckd_private *) block->base->private; |
1da177e4 | 2024 | if (private->init_cqr_status < 0) |
8e09f215 | 2025 | return dasd_eckd_start_analysis(block); |
1da177e4 | 2026 | else |
8e09f215 | 2027 | return dasd_eckd_end_analysis(block); |
1da177e4 LT |
2028 | } |
2029 | ||
d42e1712 | 2030 | static int dasd_eckd_basic_to_ready(struct dasd_device *device) |
8e09f215 SW |
2031 | { |
2032 | return dasd_alias_add_device(device); | |
2033 | }; | |
2034 | ||
2035 | static int dasd_eckd_online_to_ready(struct dasd_device *device) | |
2036 | { | |
501183f2 | 2037 | cancel_work_sync(&device->reload_device); |
25e2cf1c | 2038 | cancel_work_sync(&device->kick_validate); |
d42e1712 SH |
2039 | return 0; |
2040 | }; | |
2041 | ||
2042 | static int dasd_eckd_ready_to_basic(struct dasd_device *device) | |
2043 | { | |
8e09f215 SW |
2044 | return dasd_alias_remove_device(device); |
2045 | }; | |
2046 | ||
1da177e4 | 2047 | static int |
8e09f215 | 2048 | dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) |
1da177e4 LT |
2049 | { |
2050 | struct dasd_eckd_private *private; | |
2051 | ||
8e09f215 SW |
2052 | private = (struct dasd_eckd_private *) block->base->private; |
2053 | if (dasd_check_blocksize(block->bp_block) == 0) { | |
1da177e4 | 2054 | geo->sectors = recs_per_track(&private->rdc_data, |
8e09f215 | 2055 | 0, block->bp_block); |
1da177e4 LT |
2056 | } |
2057 | geo->cylinders = private->rdc_data.no_cyl; | |
2058 | geo->heads = private->rdc_data.trk_per_cyl; | |
2059 | return 0; | |
2060 | } | |
2061 | ||
2062 | static struct dasd_ccw_req * | |
d42e1712 SH |
2063 | dasd_eckd_build_format(struct dasd_device *base, |
2064 | struct format_data_t *fdata) | |
1da177e4 | 2065 | { |
d42e1712 SH |
2066 | struct dasd_eckd_private *base_priv; |
2067 | struct dasd_eckd_private *start_priv; | |
2068 | struct dasd_device *startdev; | |
1da177e4 LT |
2069 | struct dasd_ccw_req *fcp; |
2070 | struct eckd_count *ect; | |
d42e1712 | 2071 | struct ch_t address; |
1da177e4 LT |
2072 | struct ccw1 *ccw; |
2073 | void *data; | |
b44b0ab3 | 2074 | int rpt; |
1da177e4 | 2075 | int cplength, datasize; |
d42e1712 | 2076 | int i, j; |
f9a28f7b JBJ |
2077 | int intensity = 0; |
2078 | int r0_perm; | |
d42e1712 | 2079 | int nr_tracks; |
18d6624e | 2080 | int use_prefix; |
1da177e4 | 2081 | |
d42e1712 SH |
2082 | startdev = dasd_alias_get_start_dev(base); |
2083 | if (!startdev) | |
2084 | startdev = base; | |
1da177e4 | 2085 | |
d42e1712 SH |
2086 | start_priv = (struct dasd_eckd_private *) startdev->private; |
2087 | base_priv = (struct dasd_eckd_private *) base->private; | |
2088 | ||
2089 | rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize); | |
2090 | ||
2091 | nr_tracks = fdata->stop_unit - fdata->start_unit + 1; | |
1da177e4 LT |
2092 | |
2093 | /* | |
2094 | * fdata->intensity is a bit string that tells us what to do: | |
2095 | * Bit 0: write record zero | |
2096 | * Bit 1: write home address, currently not supported | |
2097 | * Bit 2: invalidate tracks | |
2098 | * Bit 3: use OS/390 compatible disk layout (cdl) | |
f9a28f7b | 2099 | * Bit 4: do not allow storage subsystem to modify record zero |
1da177e4 LT |
2100 | * Only some bit combinations do make sense. |
2101 | */ | |
f9a28f7b JBJ |
2102 | if (fdata->intensity & 0x10) { |
2103 | r0_perm = 0; | |
2104 | intensity = fdata->intensity & ~0x10; | |
2105 | } else { | |
2106 | r0_perm = 1; | |
2107 | intensity = fdata->intensity; | |
2108 | } | |
d42e1712 | 2109 | |
18d6624e SH |
2110 | use_prefix = base_priv->features.feature[8] & 0x01; |
2111 | ||
f9a28f7b | 2112 | switch (intensity) { |
1da177e4 LT |
2113 | case 0x00: /* Normal format */ |
2114 | case 0x08: /* Normal format, use cdl. */ | |
d42e1712 | 2115 | cplength = 2 + (rpt*nr_tracks); |
18d6624e SH |
2116 | if (use_prefix) |
2117 | datasize = sizeof(struct PFX_eckd_data) + | |
2118 | sizeof(struct LO_eckd_data) + | |
2119 | rpt * nr_tracks * sizeof(struct eckd_count); | |
2120 | else | |
2121 | datasize = sizeof(struct DE_eckd_data) + | |
2122 | sizeof(struct LO_eckd_data) + | |
2123 | rpt * nr_tracks * sizeof(struct eckd_count); | |
1da177e4 LT |
2124 | break; |
2125 | case 0x01: /* Write record zero and format track. */ | |
2126 | case 0x09: /* Write record zero and format track, use cdl. */ | |
d42e1712 | 2127 | cplength = 2 + rpt * nr_tracks; |
18d6624e SH |
2128 | if (use_prefix) |
2129 | datasize = sizeof(struct PFX_eckd_data) + | |
2130 | sizeof(struct LO_eckd_data) + | |
2131 | sizeof(struct eckd_count) + | |
2132 | rpt * nr_tracks * sizeof(struct eckd_count); | |
2133 | else | |
2134 | datasize = sizeof(struct DE_eckd_data) + | |
2135 | sizeof(struct LO_eckd_data) + | |
2136 | sizeof(struct eckd_count) + | |
2137 | rpt * nr_tracks * sizeof(struct eckd_count); | |
1da177e4 LT |
2138 | break; |
2139 | case 0x04: /* Invalidate track. */ | |
2140 | case 0x0c: /* Invalidate track, use cdl. */ | |
2141 | cplength = 3; | |
18d6624e SH |
2142 | if (use_prefix) |
2143 | datasize = sizeof(struct PFX_eckd_data) + | |
2144 | sizeof(struct LO_eckd_data) + | |
2145 | sizeof(struct eckd_count); | |
2146 | else | |
2147 | datasize = sizeof(struct DE_eckd_data) + | |
2148 | sizeof(struct LO_eckd_data) + | |
2149 | sizeof(struct eckd_count); | |
1da177e4 LT |
2150 | break; |
2151 | default: | |
d42e1712 SH |
2152 | dev_warn(&startdev->cdev->dev, |
2153 | "An I/O control call used incorrect flags 0x%x\n", | |
2154 | fdata->intensity); | |
1da177e4 LT |
2155 | return ERR_PTR(-EINVAL); |
2156 | } | |
2157 | /* Allocate the format ccw request. */ | |
d42e1712 SH |
2158 | fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, |
2159 | datasize, startdev); | |
1da177e4 LT |
2160 | if (IS_ERR(fcp)) |
2161 | return fcp; | |
2162 | ||
d42e1712 | 2163 | start_priv->count++; |
1da177e4 LT |
2164 | data = fcp->data; |
2165 | ccw = fcp->cpaddr; | |
2166 | ||
f9a28f7b | 2167 | switch (intensity & ~0x08) { |
1da177e4 | 2168 | case 0x00: /* Normal format. */ |
18d6624e SH |
2169 | if (use_prefix) { |
2170 | prefix(ccw++, (struct PFX_eckd_data *) data, | |
2171 | fdata->start_unit, fdata->stop_unit, | |
2172 | DASD_ECKD_CCW_WRITE_CKD, base, startdev); | |
2173 | /* grant subsystem permission to format R0 */ | |
2174 | if (r0_perm) | |
2175 | ((struct PFX_eckd_data *)data) | |
2176 | ->define_extent.ga_extended |= 0x04; | |
2177 | data += sizeof(struct PFX_eckd_data); | |
2178 | } else { | |
2179 | define_extent(ccw++, (struct DE_eckd_data *) data, | |
2180 | fdata->start_unit, fdata->stop_unit, | |
2181 | DASD_ECKD_CCW_WRITE_CKD, startdev); | |
2182 | /* grant subsystem permission to format R0 */ | |
2183 | if (r0_perm) | |
2184 | ((struct DE_eckd_data *) data) | |
2185 | ->ga_extended |= 0x04; | |
2186 | data += sizeof(struct DE_eckd_data); | |
2187 | } | |
1da177e4 LT |
2188 | ccw[-1].flags |= CCW_FLAG_CC; |
2189 | locate_record(ccw++, (struct LO_eckd_data *) data, | |
d42e1712 SH |
2190 | fdata->start_unit, 0, rpt*nr_tracks, |
2191 | DASD_ECKD_CCW_WRITE_CKD, base, | |
1da177e4 LT |
2192 | fdata->blksize); |
2193 | data += sizeof(struct LO_eckd_data); | |
2194 | break; | |
2195 | case 0x01: /* Write record zero + format track. */ | |
18d6624e SH |
2196 | if (use_prefix) { |
2197 | prefix(ccw++, (struct PFX_eckd_data *) data, | |
2198 | fdata->start_unit, fdata->stop_unit, | |
2199 | DASD_ECKD_CCW_WRITE_RECORD_ZERO, | |
2200 | base, startdev); | |
2201 | data += sizeof(struct PFX_eckd_data); | |
2202 | } else { | |
2203 | define_extent(ccw++, (struct DE_eckd_data *) data, | |
2204 | fdata->start_unit, fdata->stop_unit, | |
2205 | DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev); | |
2206 | data += sizeof(struct DE_eckd_data); | |
2207 | } | |
1da177e4 LT |
2208 | ccw[-1].flags |= CCW_FLAG_CC; |
2209 | locate_record(ccw++, (struct LO_eckd_data *) data, | |
d42e1712 SH |
2210 | fdata->start_unit, 0, rpt * nr_tracks + 1, |
2211 | DASD_ECKD_CCW_WRITE_RECORD_ZERO, base, | |
2212 | base->block->bp_block); | |
1da177e4 LT |
2213 | data += sizeof(struct LO_eckd_data); |
2214 | break; | |
2215 | case 0x04: /* Invalidate track. */ | |
18d6624e SH |
2216 | if (use_prefix) { |
2217 | prefix(ccw++, (struct PFX_eckd_data *) data, | |
2218 | fdata->start_unit, fdata->stop_unit, | |
2219 | DASD_ECKD_CCW_WRITE_CKD, base, startdev); | |
2220 | data += sizeof(struct PFX_eckd_data); | |
2221 | } else { | |
2222 | define_extent(ccw++, (struct DE_eckd_data *) data, | |
2223 | fdata->start_unit, fdata->stop_unit, | |
2224 | DASD_ECKD_CCW_WRITE_CKD, startdev); | |
2225 | data += sizeof(struct DE_eckd_data); | |
2226 | } | |
1da177e4 LT |
2227 | ccw[-1].flags |= CCW_FLAG_CC; |
2228 | locate_record(ccw++, (struct LO_eckd_data *) data, | |
2229 | fdata->start_unit, 0, 1, | |
d42e1712 | 2230 | DASD_ECKD_CCW_WRITE_CKD, base, 8); |
1da177e4 LT |
2231 | data += sizeof(struct LO_eckd_data); |
2232 | break; | |
2233 | } | |
d42e1712 SH |
2234 | |
2235 | for (j = 0; j < nr_tracks; j++) { | |
2236 | /* calculate cylinder and head for the current track */ | |
2237 | set_ch_t(&address, | |
2238 | (fdata->start_unit + j) / | |
2239 | base_priv->rdc_data.trk_per_cyl, | |
2240 | (fdata->start_unit + j) % | |
2241 | base_priv->rdc_data.trk_per_cyl); | |
2242 | if (intensity & 0x01) { /* write record zero */ | |
1da177e4 LT |
2243 | ect = (struct eckd_count *) data; |
2244 | data += sizeof(struct eckd_count); | |
b44b0ab3 SW |
2245 | ect->cyl = address.cyl; |
2246 | ect->head = address.head; | |
d42e1712 | 2247 | ect->record = 0; |
1da177e4 | 2248 | ect->kl = 0; |
d42e1712 | 2249 | ect->dl = 8; |
1da177e4 | 2250 | ccw[-1].flags |= CCW_FLAG_CC; |
d42e1712 | 2251 | ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; |
1da177e4 LT |
2252 | ccw->flags = CCW_FLAG_SLI; |
2253 | ccw->count = 8; | |
2254 | ccw->cda = (__u32)(addr_t) ect; | |
2255 | ccw++; | |
2256 | } | |
d42e1712 SH |
2257 | if ((intensity & ~0x08) & 0x04) { /* erase track */ |
2258 | ect = (struct eckd_count *) data; | |
2259 | data += sizeof(struct eckd_count); | |
2260 | ect->cyl = address.cyl; | |
2261 | ect->head = address.head; | |
2262 | ect->record = 1; | |
2263 | ect->kl = 0; | |
2264 | ect->dl = 0; | |
2265 | ccw[-1].flags |= CCW_FLAG_CC; | |
2266 | ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; | |
2267 | ccw->flags = CCW_FLAG_SLI; | |
2268 | ccw->count = 8; | |
2269 | ccw->cda = (__u32)(addr_t) ect; | |
2270 | } else { /* write remaining records */ | |
2271 | for (i = 0; i < rpt; i++) { | |
2272 | ect = (struct eckd_count *) data; | |
2273 | data += sizeof(struct eckd_count); | |
2274 | ect->cyl = address.cyl; | |
2275 | ect->head = address.head; | |
2276 | ect->record = i + 1; | |
2277 | ect->kl = 0; | |
2278 | ect->dl = fdata->blksize; | |
2279 | /* | |
2280 | * Check for special tracks 0-1 | |
2281 | * when formatting CDL | |
2282 | */ | |
2283 | if ((intensity & 0x08) && | |
2284 | fdata->start_unit == 0) { | |
2285 | if (i < 3) { | |
2286 | ect->kl = 4; | |
2287 | ect->dl = sizes_trk0[i] - 4; | |
2288 | } | |
2289 | } | |
2290 | if ((intensity & 0x08) && | |
2291 | fdata->start_unit == 1) { | |
2292 | ect->kl = 44; | |
2293 | ect->dl = LABEL_SIZE - 44; | |
2294 | } | |
2295 | ccw[-1].flags |= CCW_FLAG_CC; | |
2296 | if (i != 0 || j == 0) | |
2297 | ccw->cmd_code = | |
2298 | DASD_ECKD_CCW_WRITE_CKD; | |
2299 | else | |
2300 | ccw->cmd_code = | |
2301 | DASD_ECKD_CCW_WRITE_CKD_MT; | |
2302 | ccw->flags = CCW_FLAG_SLI; | |
2303 | ccw->count = 8; | |
2304 | ccw->cda = (__u32)(addr_t) ect; | |
2305 | ccw++; | |
2306 | } | |
2307 | } | |
1da177e4 | 2308 | } |
d42e1712 SH |
2309 | |
2310 | fcp->startdev = startdev; | |
2311 | fcp->memdev = startdev; | |
eb6e199b | 2312 | fcp->retries = 256; |
d42e1712 | 2313 | fcp->expires = startdev->default_expires * HZ; |
1aae0560 | 2314 | fcp->buildclk = get_tod_clock(); |
1da177e4 | 2315 | fcp->status = DASD_CQR_FILLED; |
d42e1712 | 2316 | |
1da177e4 LT |
2317 | return fcp; |
2318 | } | |
2319 | ||
d42e1712 SH |
2320 | static int |
2321 | dasd_eckd_format_device(struct dasd_device *base, | |
2322 | struct format_data_t *fdata) | |
2323 | { | |
2324 | struct dasd_ccw_req *cqr, *n; | |
2325 | struct dasd_block *block; | |
2326 | struct dasd_eckd_private *private; | |
2327 | struct list_head format_queue; | |
2328 | struct dasd_device *device; | |
2329 | int old_stop, format_step; | |
2330 | int step, rc = 0; | |
2331 | ||
2332 | block = base->block; | |
2333 | private = (struct dasd_eckd_private *) base->private; | |
2334 | ||
2335 | /* Sanity checks. */ | |
2336 | if (fdata->start_unit >= | |
2337 | (private->real_cyl * private->rdc_data.trk_per_cyl)) { | |
2338 | dev_warn(&base->cdev->dev, | |
2339 | "Start track number %u used in formatting is too big\n", | |
2340 | fdata->start_unit); | |
2341 | return -EINVAL; | |
2342 | } | |
2343 | if (fdata->stop_unit >= | |
2344 | (private->real_cyl * private->rdc_data.trk_per_cyl)) { | |
2345 | dev_warn(&base->cdev->dev, | |
2346 | "Stop track number %u used in formatting is too big\n", | |
2347 | fdata->stop_unit); | |
2348 | return -EINVAL; | |
2349 | } | |
2350 | if (fdata->start_unit > fdata->stop_unit) { | |
2351 | dev_warn(&base->cdev->dev, | |
2352 | "Start track %u used in formatting exceeds end track\n", | |
2353 | fdata->start_unit); | |
2354 | return -EINVAL; | |
2355 | } | |
2356 | if (dasd_check_blocksize(fdata->blksize) != 0) { | |
2357 | dev_warn(&base->cdev->dev, | |
2358 | "The DASD cannot be formatted with block size %u\n", | |
2359 | fdata->blksize); | |
2360 | return -EINVAL; | |
2361 | } | |
2362 | ||
2363 | INIT_LIST_HEAD(&format_queue); | |
2364 | old_stop = fdata->stop_unit; | |
2365 | ||
2366 | while (fdata->start_unit <= 1) { | |
2367 | fdata->stop_unit = fdata->start_unit; | |
2368 | cqr = dasd_eckd_build_format(base, fdata); | |
2369 | list_add(&cqr->blocklist, &format_queue); | |
2370 | ||
2371 | fdata->stop_unit = old_stop; | |
2372 | fdata->start_unit++; | |
2373 | ||
2374 | if (fdata->start_unit > fdata->stop_unit) | |
2375 | goto sleep; | |
2376 | } | |
2377 | ||
2378 | retry: | |
2379 | format_step = 255 / recs_per_track(&private->rdc_data, 0, | |
2380 | fdata->blksize); | |
2381 | while (fdata->start_unit <= old_stop) { | |
2382 | step = fdata->stop_unit - fdata->start_unit + 1; | |
2383 | if (step > format_step) | |
2384 | fdata->stop_unit = fdata->start_unit + format_step - 1; | |
2385 | ||
2386 | cqr = dasd_eckd_build_format(base, fdata); | |
2387 | if (IS_ERR(cqr)) { | |
2388 | if (PTR_ERR(cqr) == -ENOMEM) { | |
2389 | /* | |
2390 | * not enough memory available | |
2391 | * go to out and start requests | |
2392 | * retry after first requests were finished | |
2393 | */ | |
2394 | fdata->stop_unit = old_stop; | |
2395 | goto sleep; | |
2396 | } else | |
2397 | return PTR_ERR(cqr); | |
2398 | } | |
2399 | list_add(&cqr->blocklist, &format_queue); | |
2400 | ||
2401 | fdata->start_unit = fdata->stop_unit + 1; | |
2402 | fdata->stop_unit = old_stop; | |
2403 | } | |
2404 | ||
2405 | sleep: | |
2406 | dasd_sleep_on_queue(&format_queue); | |
2407 | ||
2408 | list_for_each_entry_safe(cqr, n, &format_queue, blocklist) { | |
2409 | device = cqr->startdev; | |
2410 | private = (struct dasd_eckd_private *) device->private; | |
2411 | if (cqr->status == DASD_CQR_FAILED) | |
2412 | rc = -EIO; | |
2413 | list_del_init(&cqr->blocklist); | |
2414 | dasd_sfree_request(cqr, device); | |
2415 | private->count--; | |
2416 | } | |
2417 | ||
2418 | /* | |
2419 | * in case of ENOMEM we need to retry after | |
2420 | * first requests are finished | |
2421 | */ | |
2422 | if (fdata->start_unit <= fdata->stop_unit) | |
2423 | goto retry; | |
2424 | ||
2425 | return rc; | |
2426 | } | |
2427 | ||
8e09f215 | 2428 | static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) |
1da177e4 | 2429 | { |
a2ace466 HR |
2430 | if (cqr->retries < 0) { |
2431 | cqr->status = DASD_CQR_FAILED; | |
2432 | return; | |
2433 | } | |
8e09f215 SW |
2434 | cqr->status = DASD_CQR_FILLED; |
2435 | if (cqr->block && (cqr->startdev != cqr->block->base)) { | |
2436 | dasd_eckd_reset_ccw_to_base_io(cqr); | |
2437 | cqr->startdev = cqr->block->base; | |
a4d26c6a | 2438 | cqr->lpm = cqr->block->base->path_data.opm; |
1da177e4 | 2439 | } |
8e09f215 | 2440 | }; |
1da177e4 LT |
2441 | |
2442 | static dasd_erp_fn_t | |
2443 | dasd_eckd_erp_action(struct dasd_ccw_req * cqr) | |
2444 | { | |
8e09f215 | 2445 | struct dasd_device *device = (struct dasd_device *) cqr->startdev; |
1da177e4 LT |
2446 | struct ccw_device *cdev = device->cdev; |
2447 | ||
2448 | switch (cdev->id.cu_type) { | |
2449 | case 0x3990: | |
2450 | case 0x2105: | |
2451 | case 0x2107: | |
2452 | case 0x1750: | |
2453 | return dasd_3990_erp_action; | |
2454 | case 0x9343: | |
2455 | case 0x3880: | |
2456 | default: | |
2457 | return dasd_default_erp_action; | |
2458 | } | |
2459 | } | |
2460 | ||
2461 | static dasd_erp_fn_t | |
2462 | dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) | |
2463 | { | |
2464 | return dasd_default_erp_postaction; | |
2465 | } | |
2466 | ||
5a27e60d SW |
2467 | static void dasd_eckd_check_for_device_change(struct dasd_device *device, |
2468 | struct dasd_ccw_req *cqr, | |
2469 | struct irb *irb) | |
8e09f215 SW |
2470 | { |
2471 | char mask; | |
f3eb5384 | 2472 | char *sense = NULL; |
501183f2 | 2473 | struct dasd_eckd_private *private; |
8e09f215 | 2474 | |
501183f2 | 2475 | private = (struct dasd_eckd_private *) device->private; |
8e09f215 SW |
2476 | /* first of all check for state change pending interrupt */ |
2477 | mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; | |
f3eb5384 | 2478 | if ((scsw_dstat(&irb->scsw) & mask) == mask) { |
c8d1c0ff SH |
2479 | /* |
2480 | * for alias only, not in offline processing | |
2481 | * and only if not suspended | |
2482 | */ | |
501183f2 | 2483 | if (!device->block && private->lcu && |
25e2cf1c | 2484 | device->state == DASD_STATE_ONLINE && |
c8d1c0ff SH |
2485 | !test_bit(DASD_FLAG_OFFLINE, &device->flags) && |
2486 | !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { | |
501183f2 SH |
2487 | /* |
2488 | * the state change could be caused by an alias | |
2489 | * reassignment remove device from alias handling | |
2490 | * to prevent new requests from being scheduled on | |
2491 | * the wrong alias device | |
2492 | */ | |
2493 | dasd_alias_remove_device(device); | |
2494 | ||
2495 | /* schedule worker to reload device */ | |
2496 | dasd_reload_device(device); | |
2497 | } | |
8e09f215 SW |
2498 | dasd_generic_handle_state_change(device); |
2499 | return; | |
2500 | } | |
2501 | ||
a5a0061f | 2502 | sense = dasd_get_sense(irb); |
5a27e60d SW |
2503 | if (!sense) |
2504 | return; | |
2505 | ||
2506 | /* summary unit check */ | |
c7a29e56 | 2507 | if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && |
a5a0061f | 2508 | (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { |
8e09f215 SW |
2509 | dasd_alias_handle_summary_unit_check(device, irb); |
2510 | return; | |
2511 | } | |
2512 | ||
f60c768c | 2513 | /* service information message SIM */ |
5a27e60d | 2514 | if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && |
f3eb5384 SW |
2515 | ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { |
2516 | dasd_3990_erp_handle_sim(device, sense); | |
f60c768c SH |
2517 | return; |
2518 | } | |
2519 | ||
5a27e60d SW |
2520 | /* loss of device reservation is handled via base devices only |
2521 | * as alias devices may be used with several bases | |
2522 | */ | |
c7a29e56 SW |
2523 | if (device->block && (sense[27] & DASD_SENSE_BIT_0) && |
2524 | (sense[7] == 0x3F) && | |
5a27e60d SW |
2525 | (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && |
2526 | test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { | |
2527 | if (device->features & DASD_FEATURE_FAILONSLCK) | |
2528 | set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); | |
2529 | clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); | |
2530 | dev_err(&device->cdev->dev, | |
2531 | "The device reservation was lost\n"); | |
ada3df91 | 2532 | } |
5a27e60d | 2533 | } |
f3eb5384 SW |
2534 | |
2535 | static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( | |
2536 | struct dasd_device *startdev, | |
8e09f215 | 2537 | struct dasd_block *block, |
f3eb5384 SW |
2538 | struct request *req, |
2539 | sector_t first_rec, | |
2540 | sector_t last_rec, | |
2541 | sector_t first_trk, | |
2542 | sector_t last_trk, | |
2543 | unsigned int first_offs, | |
2544 | unsigned int last_offs, | |
2545 | unsigned int blk_per_trk, | |
2546 | unsigned int blksize) | |
1da177e4 LT |
2547 | { |
2548 | struct dasd_eckd_private *private; | |
2549 | unsigned long *idaws; | |
2550 | struct LO_eckd_data *LO_data; | |
2551 | struct dasd_ccw_req *cqr; | |
2552 | struct ccw1 *ccw; | |
5705f702 | 2553 | struct req_iterator iter; |
1da177e4 LT |
2554 | struct bio_vec *bv; |
2555 | char *dst; | |
f3eb5384 | 2556 | unsigned int off; |
1da177e4 | 2557 | int count, cidaw, cplength, datasize; |
f3eb5384 | 2558 | sector_t recid; |
1da177e4 | 2559 | unsigned char cmd, rcmd; |
8e09f215 SW |
2560 | int use_prefix; |
2561 | struct dasd_device *basedev; | |
1da177e4 | 2562 | |
8e09f215 SW |
2563 | basedev = block->base; |
2564 | private = (struct dasd_eckd_private *) basedev->private; | |
1da177e4 LT |
2565 | if (rq_data_dir(req) == READ) |
2566 | cmd = DASD_ECKD_CCW_READ_MT; | |
2567 | else if (rq_data_dir(req) == WRITE) | |
2568 | cmd = DASD_ECKD_CCW_WRITE_MT; | |
2569 | else | |
2570 | return ERR_PTR(-EINVAL); | |
f3eb5384 | 2571 | |
1da177e4 LT |
2572 | /* Check struct bio and count the number of blocks for the request. */ |
2573 | count = 0; | |
2574 | cidaw = 0; | |
5705f702 | 2575 | rq_for_each_segment(bv, req, iter) { |
6c92e699 JA |
2576 | if (bv->bv_len & (blksize - 1)) |
2577 | /* Eckd can only do full blocks. */ | |
2578 | return ERR_PTR(-EINVAL); | |
8e09f215 | 2579 | count += bv->bv_len >> (block->s2b_shift + 9); |
347a8dc3 | 2580 | #if defined(CONFIG_64BIT) |
6c92e699 | 2581 | if (idal_is_needed (page_address(bv->bv_page), bv->bv_len)) |
8e09f215 | 2582 | cidaw += bv->bv_len >> (block->s2b_shift + 9); |
1da177e4 | 2583 | #endif |
1da177e4 LT |
2584 | } |
2585 | /* Paranoia. */ | |
2586 | if (count != last_rec - first_rec + 1) | |
2587 | return ERR_PTR(-EINVAL); | |
8e09f215 SW |
2588 | |
2589 | /* use the prefix command if available */ | |
2590 | use_prefix = private->features.feature[8] & 0x01; | |
2591 | if (use_prefix) { | |
2592 | /* 1x prefix + number of blocks */ | |
2593 | cplength = 2 + count; | |
2594 | /* 1x prefix + cidaws*sizeof(long) */ | |
2595 | datasize = sizeof(struct PFX_eckd_data) + | |
2596 | sizeof(struct LO_eckd_data) + | |
2597 | cidaw * sizeof(unsigned long); | |
2598 | } else { | |
2599 | /* 1x define extent + 1x locate record + number of blocks */ | |
2600 | cplength = 2 + count; | |
2601 | /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ | |
2602 | datasize = sizeof(struct DE_eckd_data) + | |
2603 | sizeof(struct LO_eckd_data) + | |
2604 | cidaw * sizeof(unsigned long); | |
2605 | } | |
1da177e4 LT |
2606 | /* Find out the number of additional locate record ccws for cdl. */ |
2607 | if (private->uses_cdl && first_rec < 2*blk_per_trk) { | |
2608 | if (last_rec >= 2*blk_per_trk) | |
2609 | count = 2*blk_per_trk - first_rec; | |
2610 | cplength += count; | |
2611 | datasize += count*sizeof(struct LO_eckd_data); | |
2612 | } | |
2613 | /* Allocate the ccw request. */ | |
68b781fe SH |
2614 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, |
2615 | startdev); | |
1da177e4 LT |
2616 | if (IS_ERR(cqr)) |
2617 | return cqr; | |
2618 | ccw = cqr->cpaddr; | |
8e09f215 SW |
2619 | /* First ccw is define extent or prefix. */ |
2620 | if (use_prefix) { | |
2621 | if (prefix(ccw++, cqr->data, first_trk, | |
2622 | last_trk, cmd, basedev, startdev) == -EAGAIN) { | |
2623 | /* Clock not in sync and XRC is enabled. | |
2624 | * Try again later. | |
2625 | */ | |
2626 | dasd_sfree_request(cqr, startdev); | |
2627 | return ERR_PTR(-EAGAIN); | |
2628 | } | |
2629 | idaws = (unsigned long *) (cqr->data + | |
2630 | sizeof(struct PFX_eckd_data)); | |
2631 | } else { | |
2632 | if (define_extent(ccw++, cqr->data, first_trk, | |
b38f27e8 | 2633 | last_trk, cmd, basedev) == -EAGAIN) { |
8e09f215 SW |
2634 | /* Clock not in sync and XRC is enabled. |
2635 | * Try again later. | |
2636 | */ | |
2637 | dasd_sfree_request(cqr, startdev); | |
2638 | return ERR_PTR(-EAGAIN); | |
2639 | } | |
2640 | idaws = (unsigned long *) (cqr->data + | |
2641 | sizeof(struct DE_eckd_data)); | |
d54853ef | 2642 | } |
1da177e4 | 2643 | /* Build locate_record+read/write/ccws. */ |
1da177e4 LT |
2644 | LO_data = (struct LO_eckd_data *) (idaws + cidaw); |
2645 | recid = first_rec; | |
2646 | if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { | |
2647 | /* Only standard blocks so there is just one locate record. */ | |
2648 | ccw[-1].flags |= CCW_FLAG_CC; | |
2649 | locate_record(ccw++, LO_data++, first_trk, first_offs + 1, | |
8e09f215 | 2650 | last_rec - recid + 1, cmd, basedev, blksize); |
1da177e4 | 2651 | } |
5705f702 | 2652 | rq_for_each_segment(bv, req, iter) { |
1da177e4 LT |
2653 | dst = page_address(bv->bv_page) + bv->bv_offset; |
2654 | if (dasd_page_cache) { | |
2655 | char *copy = kmem_cache_alloc(dasd_page_cache, | |
441e143e | 2656 | GFP_DMA | __GFP_NOWARN); |
1da177e4 LT |
2657 | if (copy && rq_data_dir(req) == WRITE) |
2658 | memcpy(copy + bv->bv_offset, dst, bv->bv_len); | |
2659 | if (copy) | |
2660 | dst = copy + bv->bv_offset; | |
2661 | } | |
2662 | for (off = 0; off < bv->bv_len; off += blksize) { | |
2663 | sector_t trkid = recid; | |
2664 | unsigned int recoffs = sector_div(trkid, blk_per_trk); | |
2665 | rcmd = cmd; | |
2666 | count = blksize; | |
2667 | /* Locate record for cdl special block ? */ | |
2668 | if (private->uses_cdl && recid < 2*blk_per_trk) { | |
2669 | if (dasd_eckd_cdl_special(blk_per_trk, recid)){ | |
2670 | rcmd |= 0x8; | |
2671 | count = dasd_eckd_cdl_reclen(recid); | |
ec5883ab HH |
2672 | if (count < blksize && |
2673 | rq_data_dir(req) == READ) | |
1da177e4 LT |
2674 | memset(dst + count, 0xe5, |
2675 | blksize - count); | |
2676 | } | |
2677 | ccw[-1].flags |= CCW_FLAG_CC; | |
2678 | locate_record(ccw++, LO_data++, | |
2679 | trkid, recoffs + 1, | |
8e09f215 | 2680 | 1, rcmd, basedev, count); |
1da177e4 LT |
2681 | } |
2682 | /* Locate record for standard blocks ? */ | |
2683 | if (private->uses_cdl && recid == 2*blk_per_trk) { | |
2684 | ccw[-1].flags |= CCW_FLAG_CC; | |
2685 | locate_record(ccw++, LO_data++, | |
2686 | trkid, recoffs + 1, | |
2687 | last_rec - recid + 1, | |
8e09f215 | 2688 | cmd, basedev, count); |
1da177e4 LT |
2689 | } |
2690 | /* Read/write ccw. */ | |
2691 | ccw[-1].flags |= CCW_FLAG_CC; | |
2692 | ccw->cmd_code = rcmd; | |
2693 | ccw->count = count; | |
2694 | if (idal_is_needed(dst, blksize)) { | |
2695 | ccw->cda = (__u32)(addr_t) idaws; | |
2696 | ccw->flags = CCW_FLAG_IDA; | |
2697 | idaws = idal_create_words(idaws, dst, blksize); | |
2698 | } else { | |
2699 | ccw->cda = (__u32)(addr_t) dst; | |
2700 | ccw->flags = 0; | |
2701 | } | |
2702 | ccw++; | |
2703 | dst += blksize; | |
2704 | recid++; | |
2705 | } | |
2706 | } | |
13de227b HS |
2707 | if (blk_noretry_request(req) || |
2708 | block->base->features & DASD_FEATURE_FAILFAST) | |
1c01b8a5 | 2709 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
8e09f215 SW |
2710 | cqr->startdev = startdev; |
2711 | cqr->memdev = startdev; | |
2712 | cqr->block = block; | |
7c8faa86 | 2713 | cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ |
a4d26c6a | 2714 | cqr->lpm = startdev->path_data.ppm; |
1f1ee9ad | 2715 | cqr->retries = startdev->default_retries; |
1aae0560 | 2716 | cqr->buildclk = get_tod_clock(); |
1da177e4 LT |
2717 | cqr->status = DASD_CQR_FILLED; |
2718 | return cqr; | |
2719 | } | |
2720 | ||
f3eb5384 SW |
2721 | static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( |
2722 | struct dasd_device *startdev, | |
2723 | struct dasd_block *block, | |
2724 | struct request *req, | |
2725 | sector_t first_rec, | |
2726 | sector_t last_rec, | |
2727 | sector_t first_trk, | |
2728 | sector_t last_trk, | |
2729 | unsigned int first_offs, | |
2730 | unsigned int last_offs, | |
2731 | unsigned int blk_per_trk, | |
2732 | unsigned int blksize) | |
2733 | { | |
f3eb5384 SW |
2734 | unsigned long *idaws; |
2735 | struct dasd_ccw_req *cqr; | |
2736 | struct ccw1 *ccw; | |
2737 | struct req_iterator iter; | |
2738 | struct bio_vec *bv; | |
2739 | char *dst, *idaw_dst; | |
2740 | unsigned int cidaw, cplength, datasize; | |
2741 | unsigned int tlf; | |
2742 | sector_t recid; | |
2743 | unsigned char cmd; | |
2744 | struct dasd_device *basedev; | |
2745 | unsigned int trkcount, count, count_to_trk_end; | |
2746 | unsigned int idaw_len, seg_len, part_len, len_to_track_end; | |
2747 | unsigned char new_track, end_idaw; | |
2748 | sector_t trkid; | |
2749 | unsigned int recoffs; | |
2750 | ||
2751 | basedev = block->base; | |
f3eb5384 SW |
2752 | if (rq_data_dir(req) == READ) |
2753 | cmd = DASD_ECKD_CCW_READ_TRACK_DATA; | |
2754 | else if (rq_data_dir(req) == WRITE) | |
2755 | cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; | |
2756 | else | |
2757 | return ERR_PTR(-EINVAL); | |
2758 | ||
2759 | /* Track based I/O needs IDAWs for each page, and not just for | |
2760 | * 64 bit addresses. We need additional idals for pages | |
2761 | * that get filled from two tracks, so we use the number | |
2762 | * of records as upper limit. | |
2763 | */ | |
2764 | cidaw = last_rec - first_rec + 1; | |
2765 | trkcount = last_trk - first_trk + 1; | |
2766 | ||
2767 | /* 1x prefix + one read/write ccw per track */ | |
2768 | cplength = 1 + trkcount; | |
2769 | ||
2770 | /* on 31-bit we need space for two 32 bit addresses per page | |
2771 | * on 64-bit one 64 bit address | |
2772 | */ | |
2773 | datasize = sizeof(struct PFX_eckd_data) + | |
2774 | cidaw * sizeof(unsigned long long); | |
2775 | ||
2776 | /* Allocate the ccw request. */ | |
68b781fe SH |
2777 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, |
2778 | startdev); | |
f3eb5384 SW |
2779 | if (IS_ERR(cqr)) |
2780 | return cqr; | |
2781 | ccw = cqr->cpaddr; | |
2782 | /* transfer length factor: how many bytes to read from the last track */ | |
2783 | if (first_trk == last_trk) | |
2784 | tlf = last_offs - first_offs + 1; | |
2785 | else | |
2786 | tlf = last_offs + 1; | |
2787 | tlf *= blksize; | |
2788 | ||
2789 | if (prefix_LRE(ccw++, cqr->data, first_trk, | |
2790 | last_trk, cmd, basedev, startdev, | |
2791 | 1 /* format */, first_offs + 1, | |
2792 | trkcount, blksize, | |
2793 | tlf) == -EAGAIN) { | |
2794 | /* Clock not in sync and XRC is enabled. | |
2795 | * Try again later. | |
2796 | */ | |
2797 | dasd_sfree_request(cqr, startdev); | |
2798 | return ERR_PTR(-EAGAIN); | |
2799 | } | |
2800 | ||
2801 | /* | |
2802 | * The translation of request into ccw programs must meet the | |
2803 | * following conditions: | |
2804 | * - all idaws but the first and the last must address full pages | |
2805 | * (or 2K blocks on 31-bit) | |
2806 | * - the scope of a ccw and it's idal ends with the track boundaries | |
2807 | */ | |
2808 | idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); | |
2809 | recid = first_rec; | |
2810 | new_track = 1; | |
2811 | end_idaw = 0; | |
2812 | len_to_track_end = 0; | |
246ccea1 | 2813 | idaw_dst = NULL; |
f3eb5384 SW |
2814 | idaw_len = 0; |
2815 | rq_for_each_segment(bv, req, iter) { | |
2816 | dst = page_address(bv->bv_page) + bv->bv_offset; | |
2817 | seg_len = bv->bv_len; | |
2818 | while (seg_len) { | |
2819 | if (new_track) { | |
2820 | trkid = recid; | |
2821 | recoffs = sector_div(trkid, blk_per_trk); | |
2822 | count_to_trk_end = blk_per_trk - recoffs; | |
2823 | count = min((last_rec - recid + 1), | |
2824 | (sector_t)count_to_trk_end); | |
2825 | len_to_track_end = count * blksize; | |
2826 | ccw[-1].flags |= CCW_FLAG_CC; | |
2827 | ccw->cmd_code = cmd; | |
2828 | ccw->count = len_to_track_end; | |
2829 | ccw->cda = (__u32)(addr_t)idaws; | |
2830 | ccw->flags = CCW_FLAG_IDA; | |
2831 | ccw++; | |
2832 | recid += count; | |
2833 | new_track = 0; | |
52db45c3 SW |
2834 | /* first idaw for a ccw may start anywhere */ |
2835 | if (!idaw_dst) | |
2836 | idaw_dst = dst; | |
f3eb5384 | 2837 | } |
52db45c3 SW |
2838 | /* If we start a new idaw, we must make sure that it |
2839 | * starts on an IDA_BLOCK_SIZE boundary. | |
f3eb5384 SW |
2840 | * If we continue an idaw, we must make sure that the |
2841 | * current segment begins where the so far accumulated | |
2842 | * idaw ends | |
2843 | */ | |
52db45c3 SW |
2844 | if (!idaw_dst) { |
2845 | if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { | |
2846 | dasd_sfree_request(cqr, startdev); | |
2847 | return ERR_PTR(-ERANGE); | |
2848 | } else | |
2849 | idaw_dst = dst; | |
2850 | } | |
f3eb5384 SW |
2851 | if ((idaw_dst + idaw_len) != dst) { |
2852 | dasd_sfree_request(cqr, startdev); | |
2853 | return ERR_PTR(-ERANGE); | |
2854 | } | |
2855 | part_len = min(seg_len, len_to_track_end); | |
2856 | seg_len -= part_len; | |
2857 | dst += part_len; | |
2858 | idaw_len += part_len; | |
2859 | len_to_track_end -= part_len; | |
2860 | /* collected memory area ends on an IDA_BLOCK border, | |
2861 | * -> create an idaw | |
2862 | * idal_create_words will handle cases where idaw_len | |
2863 | * is larger then IDA_BLOCK_SIZE | |
2864 | */ | |
2865 | if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) | |
2866 | end_idaw = 1; | |
2867 | /* We also need to end the idaw at track end */ | |
2868 | if (!len_to_track_end) { | |
2869 | new_track = 1; | |
2870 | end_idaw = 1; | |
2871 | } | |
2872 | if (end_idaw) { | |
2873 | idaws = idal_create_words(idaws, idaw_dst, | |
2874 | idaw_len); | |
246ccea1 | 2875 | idaw_dst = NULL; |
f3eb5384 SW |
2876 | idaw_len = 0; |
2877 | end_idaw = 0; | |
2878 | } | |
2879 | } | |
2880 | } | |
2881 | ||
2882 | if (blk_noretry_request(req) || | |
2883 | block->base->features & DASD_FEATURE_FAILFAST) | |
2884 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); | |
2885 | cqr->startdev = startdev; | |
2886 | cqr->memdev = startdev; | |
2887 | cqr->block = block; | |
7c8faa86 | 2888 | cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ |
a4d26c6a | 2889 | cqr->lpm = startdev->path_data.ppm; |
1f1ee9ad | 2890 | cqr->retries = startdev->default_retries; |
1aae0560 | 2891 | cqr->buildclk = get_tod_clock(); |
f3eb5384 SW |
2892 | cqr->status = DASD_CQR_FILLED; |
2893 | return cqr; | |
2894 | } | |
2895 | ||
2896 | static int prepare_itcw(struct itcw *itcw, | |
2897 | unsigned int trk, unsigned int totrk, int cmd, | |
2898 | struct dasd_device *basedev, | |
2899 | struct dasd_device *startdev, | |
2900 | unsigned int rec_on_trk, int count, | |
2901 | unsigned int blksize, | |
2902 | unsigned int total_data_size, | |
2903 | unsigned int tlf, | |
2904 | unsigned int blk_per_trk) | |
2905 | { | |
2906 | struct PFX_eckd_data pfxdata; | |
2907 | struct dasd_eckd_private *basepriv, *startpriv; | |
2908 | struct DE_eckd_data *dedata; | |
2909 | struct LRE_eckd_data *lredata; | |
2910 | struct dcw *dcw; | |
2911 | ||
2912 | u32 begcyl, endcyl; | |
2913 | u16 heads, beghead, endhead; | |
2914 | u8 pfx_cmd; | |
2915 | ||
2916 | int rc = 0; | |
2917 | int sector = 0; | |
2918 | int dn, d; | |
2919 | ||
2920 | ||
2921 | /* setup prefix data */ | |
2922 | basepriv = (struct dasd_eckd_private *) basedev->private; | |
2923 | startpriv = (struct dasd_eckd_private *) startdev->private; | |
2924 | dedata = &pfxdata.define_extent; | |
2925 | lredata = &pfxdata.locate_record; | |
2926 | ||
2927 | memset(&pfxdata, 0, sizeof(pfxdata)); | |
2928 | pfxdata.format = 1; /* PFX with LRE */ | |
2929 | pfxdata.base_address = basepriv->ned->unit_addr; | |
2930 | pfxdata.base_lss = basepriv->ned->ID; | |
2931 | pfxdata.validity.define_extent = 1; | |
2932 | ||
2933 | /* private uid is kept up to date, conf_data may be outdated */ | |
2934 | if (startpriv->uid.type != UA_BASE_DEVICE) { | |
2935 | pfxdata.validity.verify_base = 1; | |
2936 | if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) | |
2937 | pfxdata.validity.hyper_pav = 1; | |
2938 | } | |
2939 | ||
2940 | switch (cmd) { | |
2941 | case DASD_ECKD_CCW_READ_TRACK_DATA: | |
2942 | dedata->mask.perm = 0x1; | |
2943 | dedata->attributes.operation = basepriv->attrib.operation; | |
2944 | dedata->blk_size = blksize; | |
2945 | dedata->ga_extended |= 0x42; | |
2946 | lredata->operation.orientation = 0x0; | |
2947 | lredata->operation.operation = 0x0C; | |
2948 | lredata->auxiliary.check_bytes = 0x01; | |
2949 | pfx_cmd = DASD_ECKD_CCW_PFX_READ; | |
2950 | break; | |
2951 | case DASD_ECKD_CCW_WRITE_TRACK_DATA: | |
2952 | dedata->mask.perm = 0x02; | |
2953 | dedata->attributes.operation = basepriv->attrib.operation; | |
2954 | dedata->blk_size = blksize; | |
2955 | rc = check_XRC_on_prefix(&pfxdata, basedev); | |
2956 | dedata->ga_extended |= 0x42; | |
2957 | lredata->operation.orientation = 0x0; | |
2958 | lredata->operation.operation = 0x3F; | |
2959 | lredata->extended_operation = 0x23; | |
2960 | lredata->auxiliary.check_bytes = 0x2; | |
2961 | pfx_cmd = DASD_ECKD_CCW_PFX; | |
2962 | break; | |
2963 | default: | |
2964 | DBF_DEV_EVENT(DBF_ERR, basedev, | |
2965 | "prepare itcw, unknown opcode 0x%x", cmd); | |
2966 | BUG(); | |
2967 | break; | |
2968 | } | |
2969 | if (rc) | |
2970 | return rc; | |
2971 | ||
2972 | dedata->attributes.mode = 0x3; /* ECKD */ | |
2973 | ||
2974 | heads = basepriv->rdc_data.trk_per_cyl; | |
2975 | begcyl = trk / heads; | |
2976 | beghead = trk % heads; | |
2977 | endcyl = totrk / heads; | |
2978 | endhead = totrk % heads; | |
2979 | ||
2980 | /* check for sequential prestage - enhance cylinder range */ | |
2981 | if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || | |
2982 | dedata->attributes.operation == DASD_SEQ_ACCESS) { | |
2983 | ||
2984 | if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) | |
2985 | endcyl += basepriv->attrib.nr_cyl; | |
2986 | else | |
2987 | endcyl = (basepriv->real_cyl - 1); | |
2988 | } | |
2989 | ||
2990 | set_ch_t(&dedata->beg_ext, begcyl, beghead); | |
2991 | set_ch_t(&dedata->end_ext, endcyl, endhead); | |
2992 | ||
2993 | dedata->ep_format = 0x20; /* records per track is valid */ | |
2994 | dedata->ep_rec_per_track = blk_per_trk; | |
2995 | ||
2996 | if (rec_on_trk) { | |
2997 | switch (basepriv->rdc_data.dev_type) { | |
2998 | case 0x3390: | |
2999 | dn = ceil_quot(blksize + 6, 232); | |
3000 | d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); | |
3001 | sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; | |
3002 | break; | |
3003 | case 0x3380: | |
3004 | d = 7 + ceil_quot(blksize + 12, 32); | |
3005 | sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; | |
3006 | break; | |
3007 | } | |
3008 | } | |
3009 | ||
3010 | lredata->auxiliary.length_valid = 1; | |
3011 | lredata->auxiliary.length_scope = 1; | |
3012 | lredata->auxiliary.imbedded_ccw_valid = 1; | |
3013 | lredata->length = tlf; | |
3014 | lredata->imbedded_ccw = cmd; | |
3015 | lredata->count = count; | |
3016 | lredata->sector = sector; | |
3017 | set_ch_t(&lredata->seek_addr, begcyl, beghead); | |
3018 | lredata->search_arg.cyl = lredata->seek_addr.cyl; | |
3019 | lredata->search_arg.head = lredata->seek_addr.head; | |
3020 | lredata->search_arg.record = rec_on_trk; | |
3021 | ||
3022 | dcw = itcw_add_dcw(itcw, pfx_cmd, 0, | |
3023 | &pfxdata, sizeof(pfxdata), total_data_size); | |
82a7b955 | 3024 | return PTR_RET(dcw); |
f3eb5384 SW |
3025 | } |
3026 | ||
3027 | static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( | |
3028 | struct dasd_device *startdev, | |
3029 | struct dasd_block *block, | |
3030 | struct request *req, | |
3031 | sector_t first_rec, | |
3032 | sector_t last_rec, | |
3033 | sector_t first_trk, | |
3034 | sector_t last_trk, | |
3035 | unsigned int first_offs, | |
3036 | unsigned int last_offs, | |
3037 | unsigned int blk_per_trk, | |
3038 | unsigned int blksize) | |
3039 | { | |
f3eb5384 SW |
3040 | struct dasd_ccw_req *cqr; |
3041 | struct req_iterator iter; | |
3042 | struct bio_vec *bv; | |
3043 | char *dst; | |
3044 | unsigned int trkcount, ctidaw; | |
3045 | unsigned char cmd; | |
3046 | struct dasd_device *basedev; | |
3047 | unsigned int tlf; | |
3048 | struct itcw *itcw; | |
3049 | struct tidaw *last_tidaw = NULL; | |
3050 | int itcw_op; | |
3051 | size_t itcw_size; | |
ef19298b SW |
3052 | u8 tidaw_flags; |
3053 | unsigned int seg_len, part_len, len_to_track_end; | |
3054 | unsigned char new_track; | |
3055 | sector_t recid, trkid; | |
3056 | unsigned int offs; | |
3057 | unsigned int count, count_to_trk_end; | |
cd10502b | 3058 | int ret; |
f3eb5384 SW |
3059 | |
3060 | basedev = block->base; | |
f3eb5384 SW |
3061 | if (rq_data_dir(req) == READ) { |
3062 | cmd = DASD_ECKD_CCW_READ_TRACK_DATA; | |
3063 | itcw_op = ITCW_OP_READ; | |
3064 | } else if (rq_data_dir(req) == WRITE) { | |
3065 | cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; | |
3066 | itcw_op = ITCW_OP_WRITE; | |
3067 | } else | |
3068 | return ERR_PTR(-EINVAL); | |
3069 | ||
3070 | /* trackbased I/O needs address all memory via TIDAWs, | |
3071 | * not just for 64 bit addresses. This allows us to map | |
3072 | * each segment directly to one tidaw. | |
ef19298b SW |
3073 | * In the case of write requests, additional tidaws may |
3074 | * be needed when a segment crosses a track boundary. | |
f3eb5384 SW |
3075 | */ |
3076 | trkcount = last_trk - first_trk + 1; | |
3077 | ctidaw = 0; | |
3078 | rq_for_each_segment(bv, req, iter) { | |
3079 | ++ctidaw; | |
3080 | } | |
ef19298b SW |
3081 | if (rq_data_dir(req) == WRITE) |
3082 | ctidaw += (last_trk - first_trk); | |
f3eb5384 SW |
3083 | |
3084 | /* Allocate the ccw request. */ | |
3085 | itcw_size = itcw_calc_size(0, ctidaw, 0); | |
68b781fe | 3086 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); |
f3eb5384 SW |
3087 | if (IS_ERR(cqr)) |
3088 | return cqr; | |
3089 | ||
f3eb5384 SW |
3090 | /* transfer length factor: how many bytes to read from the last track */ |
3091 | if (first_trk == last_trk) | |
3092 | tlf = last_offs - first_offs + 1; | |
3093 | else | |
3094 | tlf = last_offs + 1; | |
3095 | tlf *= blksize; | |
3096 | ||
3097 | itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); | |
ef19298b | 3098 | if (IS_ERR(itcw)) { |
cd10502b JL |
3099 | ret = -EINVAL; |
3100 | goto out_error; | |
ef19298b | 3101 | } |
f3eb5384 | 3102 | cqr->cpaddr = itcw_get_tcw(itcw); |
f3eb5384 SW |
3103 | if (prepare_itcw(itcw, first_trk, last_trk, |
3104 | cmd, basedev, startdev, | |
3105 | first_offs + 1, | |
3106 | trkcount, blksize, | |
3107 | (last_rec - first_rec + 1) * blksize, | |
3108 | tlf, blk_per_trk) == -EAGAIN) { | |
3109 | /* Clock not in sync and XRC is enabled. | |
3110 | * Try again later. | |
3111 | */ | |
cd10502b JL |
3112 | ret = -EAGAIN; |
3113 | goto out_error; | |
f3eb5384 | 3114 | } |
d54cddb6 | 3115 | len_to_track_end = 0; |
f3eb5384 SW |
3116 | /* |
3117 | * A tidaw can address 4k of memory, but must not cross page boundaries | |
3118 | * We can let the block layer handle this by setting | |
3119 | * blk_queue_segment_boundary to page boundaries and | |
3120 | * blk_max_segment_size to page size when setting up the request queue. | |
ef19298b SW |
3121 | * For write requests, a TIDAW must not cross track boundaries, because |
3122 | * we have to set the CBC flag on the last tidaw for each track. | |
f3eb5384 | 3123 | */ |
ef19298b SW |
3124 | if (rq_data_dir(req) == WRITE) { |
3125 | new_track = 1; | |
3126 | recid = first_rec; | |
3127 | rq_for_each_segment(bv, req, iter) { | |
3128 | dst = page_address(bv->bv_page) + bv->bv_offset; | |
3129 | seg_len = bv->bv_len; | |
3130 | while (seg_len) { | |
3131 | if (new_track) { | |
3132 | trkid = recid; | |
3133 | offs = sector_div(trkid, blk_per_trk); | |
3134 | count_to_trk_end = blk_per_trk - offs; | |
3135 | count = min((last_rec - recid + 1), | |
3136 | (sector_t)count_to_trk_end); | |
3137 | len_to_track_end = count * blksize; | |
3138 | recid += count; | |
3139 | new_track = 0; | |
3140 | } | |
3141 | part_len = min(seg_len, len_to_track_end); | |
3142 | seg_len -= part_len; | |
3143 | len_to_track_end -= part_len; | |
3144 | /* We need to end the tidaw at track end */ | |
3145 | if (!len_to_track_end) { | |
3146 | new_track = 1; | |
3147 | tidaw_flags = TIDAW_FLAGS_INSERT_CBC; | |
3148 | } else | |
3149 | tidaw_flags = 0; | |
3150 | last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, | |
3151 | dst, part_len); | |
cd10502b JL |
3152 | if (IS_ERR(last_tidaw)) { |
3153 | ret = -EINVAL; | |
3154 | goto out_error; | |
3155 | } | |
ef19298b SW |
3156 | dst += part_len; |
3157 | } | |
3158 | } | |
3159 | } else { | |
3160 | rq_for_each_segment(bv, req, iter) { | |
3161 | dst = page_address(bv->bv_page) + bv->bv_offset; | |
3162 | last_tidaw = itcw_add_tidaw(itcw, 0x00, | |
3163 | dst, bv->bv_len); | |
cd10502b JL |
3164 | if (IS_ERR(last_tidaw)) { |
3165 | ret = -EINVAL; | |
3166 | goto out_error; | |
3167 | } | |
ef19298b | 3168 | } |
f3eb5384 | 3169 | } |
ef19298b SW |
3170 | last_tidaw->flags |= TIDAW_FLAGS_LAST; |
3171 | last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; | |
f3eb5384 SW |
3172 | itcw_finalize(itcw); |
3173 | ||
3174 | if (blk_noretry_request(req) || | |
3175 | block->base->features & DASD_FEATURE_FAILFAST) | |
3176 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); | |
ef19298b | 3177 | cqr->cpmode = 1; |
f3eb5384 SW |
3178 | cqr->startdev = startdev; |
3179 | cqr->memdev = startdev; | |
3180 | cqr->block = block; | |
7c8faa86 | 3181 | cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ |
a4d26c6a | 3182 | cqr->lpm = startdev->path_data.ppm; |
1f1ee9ad | 3183 | cqr->retries = startdev->default_retries; |
1aae0560 | 3184 | cqr->buildclk = get_tod_clock(); |
f3eb5384 SW |
3185 | cqr->status = DASD_CQR_FILLED; |
3186 | return cqr; | |
cd10502b JL |
3187 | out_error: |
3188 | dasd_sfree_request(cqr, startdev); | |
3189 | return ERR_PTR(ret); | |
f3eb5384 SW |
3190 | } |
3191 | ||
3192 | static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, | |
3193 | struct dasd_block *block, | |
3194 | struct request *req) | |
3195 | { | |
ef19298b | 3196 | int cmdrtd, cmdwtd; |
f3eb5384 | 3197 | int use_prefix; |
ef19298b | 3198 | int fcx_multitrack; |
45b44d76 | 3199 | struct dasd_eckd_private *private; |
f3eb5384 SW |
3200 | struct dasd_device *basedev; |
3201 | sector_t first_rec, last_rec; | |
3202 | sector_t first_trk, last_trk; | |
3203 | unsigned int first_offs, last_offs; | |
3204 | unsigned int blk_per_trk, blksize; | |
3205 | int cdlspecial; | |
ef19298b | 3206 | unsigned int data_size; |
f3eb5384 SW |
3207 | struct dasd_ccw_req *cqr; |
3208 | ||
3209 | basedev = block->base; | |
3210 | private = (struct dasd_eckd_private *) basedev->private; | |
3211 | ||
3212 | /* Calculate number of blocks/records per track. */ | |
3213 | blksize = block->bp_block; | |
3214 | blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); | |
6fca97a9 SH |
3215 | if (blk_per_trk == 0) |
3216 | return ERR_PTR(-EINVAL); | |
f3eb5384 | 3217 | /* Calculate record id of first and last block. */ |
83096ebf | 3218 | first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; |
f3eb5384 SW |
3219 | first_offs = sector_div(first_trk, blk_per_trk); |
3220 | last_rec = last_trk = | |
83096ebf | 3221 | (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; |
f3eb5384 SW |
3222 | last_offs = sector_div(last_trk, blk_per_trk); |
3223 | cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); | |
3224 | ||
ef19298b SW |
3225 | fcx_multitrack = private->features.feature[40] & 0x20; |
3226 | data_size = blk_rq_bytes(req); | |
3227 | /* tpm write request add CBC data on each track boundary */ | |
3228 | if (rq_data_dir(req) == WRITE) | |
3229 | data_size += (last_trk - first_trk) * 4; | |
f3eb5384 SW |
3230 | |
3231 | /* is read track data and write track data in command mode supported? */ | |
3232 | cmdrtd = private->features.feature[9] & 0x20; | |
3233 | cmdwtd = private->features.feature[12] & 0x40; | |
3234 | use_prefix = private->features.feature[8] & 0x01; | |
3235 | ||
3236 | cqr = NULL; | |
3237 | if (cdlspecial || dasd_page_cache) { | |
3238 | /* do nothing, just fall through to the cmd mode single case */ | |
ef19298b SW |
3239 | } else if ((data_size <= private->fcx_max_data) |
3240 | && (fcx_multitrack || (first_trk == last_trk))) { | |
f3eb5384 SW |
3241 | cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, |
3242 | first_rec, last_rec, | |
3243 | first_trk, last_trk, | |
3244 | first_offs, last_offs, | |
3245 | blk_per_trk, blksize); | |
ef19298b SW |
3246 | if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && |
3247 | (PTR_ERR(cqr) != -ENOMEM)) | |
f3eb5384 SW |
3248 | cqr = NULL; |
3249 | } else if (use_prefix && | |
3250 | (((rq_data_dir(req) == READ) && cmdrtd) || | |
3251 | ((rq_data_dir(req) == WRITE) && cmdwtd))) { | |
3252 | cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, | |
3253 | first_rec, last_rec, | |
3254 | first_trk, last_trk, | |
3255 | first_offs, last_offs, | |
3256 | blk_per_trk, blksize); | |
ef19298b SW |
3257 | if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && |
3258 | (PTR_ERR(cqr) != -ENOMEM)) | |
f3eb5384 SW |
3259 | cqr = NULL; |
3260 | } | |
3261 | if (!cqr) | |
3262 | cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, | |
3263 | first_rec, last_rec, | |
3264 | first_trk, last_trk, | |
3265 | first_offs, last_offs, | |
3266 | blk_per_trk, blksize); | |
3267 | return cqr; | |
3268 | } | |
3269 | ||
e4dbb0f2 SH |
3270 | static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev, |
3271 | struct dasd_block *block, | |
3272 | struct request *req) | |
3273 | { | |
e4dbb0f2 SH |
3274 | unsigned long *idaws; |
3275 | struct dasd_device *basedev; | |
3276 | struct dasd_ccw_req *cqr; | |
3277 | struct ccw1 *ccw; | |
3278 | struct req_iterator iter; | |
3279 | struct bio_vec *bv; | |
3280 | char *dst; | |
3281 | unsigned char cmd; | |
3282 | unsigned int trkcount; | |
3283 | unsigned int seg_len, len_to_track_end; | |
3284 | unsigned int first_offs; | |
3285 | unsigned int cidaw, cplength, datasize; | |
558b9ef0 SW |
3286 | sector_t first_trk, last_trk, sectors; |
3287 | sector_t start_padding_sectors, end_sector_offset, end_padding_sectors; | |
e4dbb0f2 SH |
3288 | unsigned int pfx_datasize; |
3289 | ||
3290 | /* | |
3291 | * raw track access needs to be mutiple of 64k and on 64k boundary | |
558b9ef0 SW |
3292 | * For read requests we can fix an incorrect alignment by padding |
3293 | * the request with dummy pages. | |
e4dbb0f2 | 3294 | */ |
558b9ef0 SW |
3295 | start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK; |
3296 | end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) % | |
3297 | DASD_RAW_SECTORS_PER_TRACK; | |
3298 | end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) % | |
3299 | DASD_RAW_SECTORS_PER_TRACK; | |
3300 | basedev = block->base; | |
3301 | if ((start_padding_sectors || end_padding_sectors) && | |
3302 | (rq_data_dir(req) == WRITE)) { | |
3303 | DBF_DEV_EVENT(DBF_ERR, basedev, | |
3304 | "raw write not track aligned (%lu,%lu) req %p", | |
3305 | start_padding_sectors, end_padding_sectors, req); | |
e4dbb0f2 SH |
3306 | cqr = ERR_PTR(-EINVAL); |
3307 | goto out; | |
3308 | } | |
3309 | ||
3310 | first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; | |
3311 | last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / | |
3312 | DASD_RAW_SECTORS_PER_TRACK; | |
3313 | trkcount = last_trk - first_trk + 1; | |
3314 | first_offs = 0; | |
e4dbb0f2 SH |
3315 | |
3316 | if (rq_data_dir(req) == READ) | |
3317 | cmd = DASD_ECKD_CCW_READ_TRACK; | |
3318 | else if (rq_data_dir(req) == WRITE) | |
3319 | cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; | |
3320 | else { | |
3321 | cqr = ERR_PTR(-EINVAL); | |
3322 | goto out; | |
3323 | } | |
3324 | ||
3325 | /* | |
3326 | * Raw track based I/O needs IDAWs for each page, | |
3327 | * and not just for 64 bit addresses. | |
3328 | */ | |
3329 | cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; | |
3330 | ||
3331 | /* 1x prefix + one read/write ccw per track */ | |
3332 | cplength = 1 + trkcount; | |
3333 | ||
3334 | /* | |
3335 | * struct PFX_eckd_data has up to 2 byte as extended parameter | |
3336 | * this is needed for write full track and has to be mentioned | |
25985edc | 3337 | * separately |
e4dbb0f2 SH |
3338 | * add 8 instead of 2 to keep 8 byte boundary |
3339 | */ | |
3340 | pfx_datasize = sizeof(struct PFX_eckd_data) + 8; | |
3341 | ||
3342 | datasize = pfx_datasize + cidaw * sizeof(unsigned long long); | |
3343 | ||
3344 | /* Allocate the ccw request. */ | |
3345 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, | |
3346 | datasize, startdev); | |
3347 | if (IS_ERR(cqr)) | |
3348 | goto out; | |
3349 | ccw = cqr->cpaddr; | |
3350 | ||
3351 | if (prefix_LRE(ccw++, cqr->data, first_trk, last_trk, cmd, | |
3352 | basedev, startdev, 1 /* format */, first_offs + 1, | |
3353 | trkcount, 0, 0) == -EAGAIN) { | |
3354 | /* Clock not in sync and XRC is enabled. | |
3355 | * Try again later. | |
3356 | */ | |
3357 | dasd_sfree_request(cqr, startdev); | |
3358 | cqr = ERR_PTR(-EAGAIN); | |
3359 | goto out; | |
3360 | } | |
3361 | ||
3362 | idaws = (unsigned long *)(cqr->data + pfx_datasize); | |
e4dbb0f2 | 3363 | len_to_track_end = 0; |
558b9ef0 SW |
3364 | if (start_padding_sectors) { |
3365 | ccw[-1].flags |= CCW_FLAG_CC; | |
3366 | ccw->cmd_code = cmd; | |
3367 | /* maximum 3390 track size */ | |
3368 | ccw->count = 57326; | |
3369 | /* 64k map to one track */ | |
3370 | len_to_track_end = 65536 - start_padding_sectors * 512; | |
3371 | ccw->cda = (__u32)(addr_t)idaws; | |
3372 | ccw->flags |= CCW_FLAG_IDA; | |
3373 | ccw->flags |= CCW_FLAG_SLI; | |
3374 | ccw++; | |
3375 | for (sectors = 0; sectors < start_padding_sectors; sectors += 8) | |
3376 | idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); | |
3377 | } | |
e4dbb0f2 SH |
3378 | rq_for_each_segment(bv, req, iter) { |
3379 | dst = page_address(bv->bv_page) + bv->bv_offset; | |
3380 | seg_len = bv->bv_len; | |
558b9ef0 SW |
3381 | if (cmd == DASD_ECKD_CCW_READ_TRACK) |
3382 | memset(dst, 0, seg_len); | |
e4dbb0f2 SH |
3383 | if (!len_to_track_end) { |
3384 | ccw[-1].flags |= CCW_FLAG_CC; | |
3385 | ccw->cmd_code = cmd; | |
3386 | /* maximum 3390 track size */ | |
3387 | ccw->count = 57326; | |
3388 | /* 64k map to one track */ | |
3389 | len_to_track_end = 65536; | |
3390 | ccw->cda = (__u32)(addr_t)idaws; | |
3391 | ccw->flags |= CCW_FLAG_IDA; | |
3392 | ccw->flags |= CCW_FLAG_SLI; | |
3393 | ccw++; | |
3394 | } | |
3395 | len_to_track_end -= seg_len; | |
3396 | idaws = idal_create_words(idaws, dst, seg_len); | |
3397 | } | |
558b9ef0 SW |
3398 | for (sectors = 0; sectors < end_padding_sectors; sectors += 8) |
3399 | idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); | |
e4dbb0f2 SH |
3400 | if (blk_noretry_request(req) || |
3401 | block->base->features & DASD_FEATURE_FAILFAST) | |
3402 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); | |
3403 | cqr->startdev = startdev; | |
3404 | cqr->memdev = startdev; | |
3405 | cqr->block = block; | |
3406 | cqr->expires = startdev->default_expires * HZ; | |
3407 | cqr->lpm = startdev->path_data.ppm; | |
1f1ee9ad | 3408 | cqr->retries = startdev->default_retries; |
1aae0560 | 3409 | cqr->buildclk = get_tod_clock(); |
e4dbb0f2 SH |
3410 | cqr->status = DASD_CQR_FILLED; |
3411 | ||
3412 | if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN) | |
3413 | cqr = NULL; | |
3414 | out: | |
3415 | return cqr; | |
3416 | } | |
3417 | ||
3418 | ||
1da177e4 LT |
3419 | static int |
3420 | dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) | |
3421 | { | |
3422 | struct dasd_eckd_private *private; | |
3423 | struct ccw1 *ccw; | |
5705f702 | 3424 | struct req_iterator iter; |
1da177e4 LT |
3425 | struct bio_vec *bv; |
3426 | char *dst, *cda; | |
3427 | unsigned int blksize, blk_per_trk, off; | |
3428 | sector_t recid; | |
5705f702 | 3429 | int status; |
1da177e4 LT |
3430 | |
3431 | if (!dasd_page_cache) | |
3432 | goto out; | |
8e09f215 SW |
3433 | private = (struct dasd_eckd_private *) cqr->block->base->private; |
3434 | blksize = cqr->block->bp_block; | |
1da177e4 | 3435 | blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); |
83096ebf | 3436 | recid = blk_rq_pos(req) >> cqr->block->s2b_shift; |
1da177e4 LT |
3437 | ccw = cqr->cpaddr; |
3438 | /* Skip over define extent & locate record. */ | |
3439 | ccw++; | |
3440 | if (private->uses_cdl == 0 || recid > 2*blk_per_trk) | |
3441 | ccw++; | |
5705f702 | 3442 | rq_for_each_segment(bv, req, iter) { |
1da177e4 LT |
3443 | dst = page_address(bv->bv_page) + bv->bv_offset; |
3444 | for (off = 0; off < bv->bv_len; off += blksize) { | |
3445 | /* Skip locate record. */ | |
3446 | if (private->uses_cdl && recid <= 2*blk_per_trk) | |
3447 | ccw++; | |
3448 | if (dst) { | |
3449 | if (ccw->flags & CCW_FLAG_IDA) | |
3450 | cda = *((char **)((addr_t) ccw->cda)); | |
3451 | else | |
3452 | cda = (char *)((addr_t) ccw->cda); | |
3453 | if (dst != cda) { | |
3454 | if (rq_data_dir(req) == READ) | |
3455 | memcpy(dst, cda, bv->bv_len); | |
3456 | kmem_cache_free(dasd_page_cache, | |
3457 | (void *)((addr_t)cda & PAGE_MASK)); | |
3458 | } | |
3459 | dst = NULL; | |
3460 | } | |
3461 | ccw++; | |
3462 | recid++; | |
3463 | } | |
3464 | } | |
3465 | out: | |
3466 | status = cqr->status == DASD_CQR_DONE; | |
8e09f215 | 3467 | dasd_sfree_request(cqr, cqr->memdev); |
1da177e4 LT |
3468 | return status; |
3469 | } | |
3470 | ||
8e09f215 | 3471 | /* |
f3eb5384 | 3472 | * Modify ccw/tcw in cqr so it can be started on a base device. |
8e09f215 SW |
3473 | * |
3474 | * Note that this is not enough to restart the cqr! | |
3475 | * Either reset cqr->startdev as well (summary unit check handling) | |
3476 | * or restart via separate cqr (as in ERP handling). | |
3477 | */ | |
3478 | void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) | |
3479 | { | |
3480 | struct ccw1 *ccw; | |
3481 | struct PFX_eckd_data *pfxdata; | |
f3eb5384 SW |
3482 | struct tcw *tcw; |
3483 | struct tccb *tccb; | |
3484 | struct dcw *dcw; | |
3485 | ||
3486 | if (cqr->cpmode == 1) { | |
3487 | tcw = cqr->cpaddr; | |
3488 | tccb = tcw_get_tccb(tcw); | |
3489 | dcw = (struct dcw *)&tccb->tca[0]; | |
3490 | pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; | |
8e09f215 SW |
3491 | pfxdata->validity.verify_base = 0; |
3492 | pfxdata->validity.hyper_pav = 0; | |
f3eb5384 SW |
3493 | } else { |
3494 | ccw = cqr->cpaddr; | |
3495 | pfxdata = cqr->data; | |
3496 | if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { | |
3497 | pfxdata->validity.verify_base = 0; | |
3498 | pfxdata->validity.hyper_pav = 0; | |
3499 | } | |
8e09f215 SW |
3500 | } |
3501 | } | |
3502 | ||
3503 | #define DASD_ECKD_CHANQ_MAX_SIZE 4 | |
3504 | ||
3505 | static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, | |
3506 | struct dasd_block *block, | |
3507 | struct request *req) | |
3508 | { | |
3509 | struct dasd_eckd_private *private; | |
3510 | struct dasd_device *startdev; | |
3511 | unsigned long flags; | |
3512 | struct dasd_ccw_req *cqr; | |
3513 | ||
3514 | startdev = dasd_alias_get_start_dev(base); | |
3515 | if (!startdev) | |
3516 | startdev = base; | |
3517 | private = (struct dasd_eckd_private *) startdev->private; | |
3518 | if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) | |
3519 | return ERR_PTR(-EBUSY); | |
3520 | ||
3521 | spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); | |
3522 | private->count++; | |
e4dbb0f2 SH |
3523 | if ((base->features & DASD_FEATURE_USERAW)) |
3524 | cqr = dasd_raw_build_cp(startdev, block, req); | |
3525 | else | |
3526 | cqr = dasd_eckd_build_cp(startdev, block, req); | |
8e09f215 SW |
3527 | if (IS_ERR(cqr)) |
3528 | private->count--; | |
3529 | spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); | |
3530 | return cqr; | |
3531 | } | |
3532 | ||
3533 | static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, | |
3534 | struct request *req) | |
3535 | { | |
3536 | struct dasd_eckd_private *private; | |
3537 | unsigned long flags; | |
3538 | ||
3539 | spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); | |
3540 | private = (struct dasd_eckd_private *) cqr->memdev->private; | |
3541 | private->count--; | |
3542 | spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); | |
3543 | return dasd_eckd_free_cp(cqr, req); | |
3544 | } | |
3545 | ||
1da177e4 LT |
3546 | static int |
3547 | dasd_eckd_fill_info(struct dasd_device * device, | |
3548 | struct dasd_information2_t * info) | |
3549 | { | |
3550 | struct dasd_eckd_private *private; | |
3551 | ||
3552 | private = (struct dasd_eckd_private *) device->private; | |
3553 | info->label_block = 2; | |
3554 | info->FBA_layout = private->uses_cdl ? 0 : 1; | |
3555 | info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; | |
3556 | info->characteristics_size = sizeof(struct dasd_eckd_characteristics); | |
3557 | memcpy(info->characteristics, &private->rdc_data, | |
3558 | sizeof(struct dasd_eckd_characteristics)); | |
4abb08c2 SW |
3559 | info->confdata_size = min((unsigned long)private->conf_len, |
3560 | sizeof(info->configuration_data)); | |
3561 | memcpy(info->configuration_data, private->conf_data, | |
3562 | info->confdata_size); | |
1da177e4 LT |
3563 | return 0; |
3564 | } | |
3565 | ||
3566 | /* | |
3567 | * SECTION: ioctl functions for eckd devices. | |
3568 | */ | |
3569 | ||
3570 | /* | |
3571 | * Release device ioctl. | |
138c014d | 3572 | * Buils a channel programm to releases a prior reserved |
1da177e4 LT |
3573 | * (see dasd_eckd_reserve) device. |
3574 | */ | |
3575 | static int | |
1107ccfb | 3576 | dasd_eckd_release(struct dasd_device *device) |
1da177e4 | 3577 | { |
1da177e4 LT |
3578 | struct dasd_ccw_req *cqr; |
3579 | int rc; | |
f3eb5384 | 3580 | struct ccw1 *ccw; |
f932bcea | 3581 | int useglobal; |
1da177e4 LT |
3582 | |
3583 | if (!capable(CAP_SYS_ADMIN)) | |
3584 | return -EACCES; | |
3585 | ||
f932bcea | 3586 | useglobal = 0; |
68b781fe | 3587 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); |
1da177e4 | 3588 | if (IS_ERR(cqr)) { |
f932bcea SW |
3589 | mutex_lock(&dasd_reserve_mutex); |
3590 | useglobal = 1; | |
3591 | cqr = &dasd_reserve_req->cqr; | |
3592 | memset(cqr, 0, sizeof(*cqr)); | |
3593 | memset(&dasd_reserve_req->ccw, 0, | |
3594 | sizeof(dasd_reserve_req->ccw)); | |
3595 | cqr->cpaddr = &dasd_reserve_req->ccw; | |
3596 | cqr->data = &dasd_reserve_req->data; | |
3597 | cqr->magic = DASD_ECKD_MAGIC; | |
1da177e4 | 3598 | } |
f3eb5384 SW |
3599 | ccw = cqr->cpaddr; |
3600 | ccw->cmd_code = DASD_ECKD_CCW_RELEASE; | |
3601 | ccw->flags |= CCW_FLAG_SLI; | |
3602 | ccw->count = 32; | |
3603 | ccw->cda = (__u32)(addr_t) cqr->data; | |
8e09f215 SW |
3604 | cqr->startdev = device; |
3605 | cqr->memdev = device; | |
1da177e4 | 3606 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
1c01b8a5 | 3607 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
336c340b | 3608 | cqr->retries = 2; /* set retry counter to enable basic ERP */ |
1da177e4 | 3609 | cqr->expires = 2 * HZ; |
1aae0560 | 3610 | cqr->buildclk = get_tod_clock(); |
1da177e4 LT |
3611 | cqr->status = DASD_CQR_FILLED; |
3612 | ||
3613 | rc = dasd_sleep_on_immediatly(cqr); | |
5a27e60d SW |
3614 | if (!rc) |
3615 | clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); | |
1da177e4 | 3616 | |
f932bcea SW |
3617 | if (useglobal) |
3618 | mutex_unlock(&dasd_reserve_mutex); | |
3619 | else | |
3620 | dasd_sfree_request(cqr, cqr->memdev); | |
1da177e4 LT |
3621 | return rc; |
3622 | } | |
3623 | ||
3624 | /* | |
3625 | * Reserve device ioctl. | |
3626 | * Options are set to 'synchronous wait for interrupt' and | |
138c014d HH |
3627 | * 'timeout the request'. This leads to a terminate IO if |
3628 | * the interrupt is outstanding for a certain time. | |
1da177e4 LT |
3629 | */ |
3630 | static int | |
1107ccfb | 3631 | dasd_eckd_reserve(struct dasd_device *device) |
1da177e4 | 3632 | { |
1da177e4 LT |
3633 | struct dasd_ccw_req *cqr; |
3634 | int rc; | |
f3eb5384 | 3635 | struct ccw1 *ccw; |
f932bcea | 3636 | int useglobal; |
1da177e4 LT |
3637 | |
3638 | if (!capable(CAP_SYS_ADMIN)) | |
3639 | return -EACCES; | |
3640 | ||
f932bcea | 3641 | useglobal = 0; |
68b781fe | 3642 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); |
1da177e4 | 3643 | if (IS_ERR(cqr)) { |
f932bcea SW |
3644 | mutex_lock(&dasd_reserve_mutex); |
3645 | useglobal = 1; | |
3646 | cqr = &dasd_reserve_req->cqr; | |
3647 | memset(cqr, 0, sizeof(*cqr)); | |
3648 | memset(&dasd_reserve_req->ccw, 0, | |
3649 | sizeof(dasd_reserve_req->ccw)); | |
3650 | cqr->cpaddr = &dasd_reserve_req->ccw; | |
3651 | cqr->data = &dasd_reserve_req->data; | |
3652 | cqr->magic = DASD_ECKD_MAGIC; | |
1da177e4 | 3653 | } |
f3eb5384 SW |
3654 | ccw = cqr->cpaddr; |
3655 | ccw->cmd_code = DASD_ECKD_CCW_RESERVE; | |
3656 | ccw->flags |= CCW_FLAG_SLI; | |
3657 | ccw->count = 32; | |
3658 | ccw->cda = (__u32)(addr_t) cqr->data; | |
8e09f215 SW |
3659 | cqr->startdev = device; |
3660 | cqr->memdev = device; | |
1da177e4 | 3661 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
1c01b8a5 | 3662 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
336c340b | 3663 | cqr->retries = 2; /* set retry counter to enable basic ERP */ |
1da177e4 | 3664 | cqr->expires = 2 * HZ; |
1aae0560 | 3665 | cqr->buildclk = get_tod_clock(); |
1da177e4 LT |
3666 | cqr->status = DASD_CQR_FILLED; |
3667 | ||
3668 | rc = dasd_sleep_on_immediatly(cqr); | |
5a27e60d SW |
3669 | if (!rc) |
3670 | set_bit(DASD_FLAG_IS_RESERVED, &device->flags); | |
1da177e4 | 3671 | |
f932bcea SW |
3672 | if (useglobal) |
3673 | mutex_unlock(&dasd_reserve_mutex); | |
3674 | else | |
3675 | dasd_sfree_request(cqr, cqr->memdev); | |
1da177e4 LT |
3676 | return rc; |
3677 | } | |
3678 | ||
3679 | /* | |
3680 | * Steal lock ioctl - unconditional reserve device. | |
138c014d | 3681 | * Buils a channel programm to break a device's reservation. |
1da177e4 LT |
3682 | * (unconditional reserve) |
3683 | */ | |
3684 | static int | |
1107ccfb | 3685 | dasd_eckd_steal_lock(struct dasd_device *device) |
1da177e4 | 3686 | { |
1da177e4 LT |
3687 | struct dasd_ccw_req *cqr; |
3688 | int rc; | |
f3eb5384 | 3689 | struct ccw1 *ccw; |
f932bcea | 3690 | int useglobal; |
1da177e4 LT |
3691 | |
3692 | if (!capable(CAP_SYS_ADMIN)) | |
3693 | return -EACCES; | |
3694 | ||
f932bcea | 3695 | useglobal = 0; |
68b781fe | 3696 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); |
1da177e4 | 3697 | if (IS_ERR(cqr)) { |
f932bcea SW |
3698 | mutex_lock(&dasd_reserve_mutex); |
3699 | useglobal = 1; | |
3700 | cqr = &dasd_reserve_req->cqr; | |
3701 | memset(cqr, 0, sizeof(*cqr)); | |
3702 | memset(&dasd_reserve_req->ccw, 0, | |
3703 | sizeof(dasd_reserve_req->ccw)); | |
3704 | cqr->cpaddr = &dasd_reserve_req->ccw; | |
3705 | cqr->data = &dasd_reserve_req->data; | |
3706 | cqr->magic = DASD_ECKD_MAGIC; | |
1da177e4 | 3707 | } |
f3eb5384 SW |
3708 | ccw = cqr->cpaddr; |
3709 | ccw->cmd_code = DASD_ECKD_CCW_SLCK; | |
3710 | ccw->flags |= CCW_FLAG_SLI; | |
3711 | ccw->count = 32; | |
3712 | ccw->cda = (__u32)(addr_t) cqr->data; | |
8e09f215 SW |
3713 | cqr->startdev = device; |
3714 | cqr->memdev = device; | |
1da177e4 | 3715 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
1c01b8a5 | 3716 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
336c340b | 3717 | cqr->retries = 2; /* set retry counter to enable basic ERP */ |
1da177e4 | 3718 | cqr->expires = 2 * HZ; |
1aae0560 | 3719 | cqr->buildclk = get_tod_clock(); |
1da177e4 LT |
3720 | cqr->status = DASD_CQR_FILLED; |
3721 | ||
3722 | rc = dasd_sleep_on_immediatly(cqr); | |
5a27e60d SW |
3723 | if (!rc) |
3724 | set_bit(DASD_FLAG_IS_RESERVED, &device->flags); | |
1da177e4 | 3725 | |
f932bcea SW |
3726 | if (useglobal) |
3727 | mutex_unlock(&dasd_reserve_mutex); | |
3728 | else | |
3729 | dasd_sfree_request(cqr, cqr->memdev); | |
1da177e4 LT |
3730 | return rc; |
3731 | } | |
3732 | ||
196339f1 SW |
3733 | /* |
3734 | * SNID - Sense Path Group ID | |
3735 | * This ioctl may be used in situations where I/O is stalled due to | |
3736 | * a reserve, so if the normal dasd_smalloc_request fails, we use the | |
3737 | * preallocated dasd_reserve_req. | |
3738 | */ | |
3739 | static int dasd_eckd_snid(struct dasd_device *device, | |
3740 | void __user *argp) | |
3741 | { | |
3742 | struct dasd_ccw_req *cqr; | |
3743 | int rc; | |
3744 | struct ccw1 *ccw; | |
3745 | int useglobal; | |
3746 | struct dasd_snid_ioctl_data usrparm; | |
3747 | ||
3748 | if (!capable(CAP_SYS_ADMIN)) | |
3749 | return -EACCES; | |
3750 | ||
3751 | if (copy_from_user(&usrparm, argp, sizeof(usrparm))) | |
3752 | return -EFAULT; | |
3753 | ||
3754 | useglobal = 0; | |
3755 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, | |
3756 | sizeof(struct dasd_snid_data), device); | |
3757 | if (IS_ERR(cqr)) { | |
3758 | mutex_lock(&dasd_reserve_mutex); | |
3759 | useglobal = 1; | |
3760 | cqr = &dasd_reserve_req->cqr; | |
3761 | memset(cqr, 0, sizeof(*cqr)); | |
3762 | memset(&dasd_reserve_req->ccw, 0, | |
3763 | sizeof(dasd_reserve_req->ccw)); | |
3764 | cqr->cpaddr = &dasd_reserve_req->ccw; | |
3765 | cqr->data = &dasd_reserve_req->data; | |
3766 | cqr->magic = DASD_ECKD_MAGIC; | |
3767 | } | |
3768 | ccw = cqr->cpaddr; | |
3769 | ccw->cmd_code = DASD_ECKD_CCW_SNID; | |
3770 | ccw->flags |= CCW_FLAG_SLI; | |
3771 | ccw->count = 12; | |
3772 | ccw->cda = (__u32)(addr_t) cqr->data; | |
3773 | cqr->startdev = device; | |
3774 | cqr->memdev = device; | |
3775 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); | |
3776 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); | |
5a27e60d | 3777 | set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); |
196339f1 SW |
3778 | cqr->retries = 5; |
3779 | cqr->expires = 10 * HZ; | |
1aae0560 | 3780 | cqr->buildclk = get_tod_clock(); |
196339f1 SW |
3781 | cqr->status = DASD_CQR_FILLED; |
3782 | cqr->lpm = usrparm.path_mask; | |
3783 | ||
3784 | rc = dasd_sleep_on_immediatly(cqr); | |
3785 | /* verify that I/O processing didn't modify the path mask */ | |
3786 | if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) | |
3787 | rc = -EIO; | |
3788 | if (!rc) { | |
3789 | usrparm.data = *((struct dasd_snid_data *)cqr->data); | |
3790 | if (copy_to_user(argp, &usrparm, sizeof(usrparm))) | |
3791 | rc = -EFAULT; | |
3792 | } | |
3793 | ||
3794 | if (useglobal) | |
3795 | mutex_unlock(&dasd_reserve_mutex); | |
3796 | else | |
3797 | dasd_sfree_request(cqr, cqr->memdev); | |
3798 | return rc; | |
3799 | } | |
3800 | ||
1da177e4 LT |
3801 | /* |
3802 | * Read performance statistics | |
3803 | */ | |
3804 | static int | |
1107ccfb | 3805 | dasd_eckd_performance(struct dasd_device *device, void __user *argp) |
1da177e4 | 3806 | { |
1da177e4 LT |
3807 | struct dasd_psf_prssd_data *prssdp; |
3808 | struct dasd_rssd_perf_stats_t *stats; | |
3809 | struct dasd_ccw_req *cqr; | |
3810 | struct ccw1 *ccw; | |
3811 | int rc; | |
3812 | ||
68b781fe | 3813 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, |
8e09f215 SW |
3814 | (sizeof(struct dasd_psf_prssd_data) + |
3815 | sizeof(struct dasd_rssd_perf_stats_t)), | |
1da177e4 LT |
3816 | device); |
3817 | if (IS_ERR(cqr)) { | |
fc19f381 | 3818 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
1da177e4 LT |
3819 | "Could not allocate initialization request"); |
3820 | return PTR_ERR(cqr); | |
3821 | } | |
8e09f215 SW |
3822 | cqr->startdev = device; |
3823 | cqr->memdev = device; | |
1da177e4 | 3824 | cqr->retries = 0; |
eb6e199b | 3825 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
1da177e4 LT |
3826 | cqr->expires = 10 * HZ; |
3827 | ||
3828 | /* Prepare for Read Subsystem Data */ | |
3829 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
8e09f215 | 3830 | memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); |
1da177e4 | 3831 | prssdp->order = PSF_ORDER_PRSSD; |
5d67d164 | 3832 | prssdp->suborder = 0x01; /* Performance Statistics */ |
1da177e4 LT |
3833 | prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ |
3834 | ||
3835 | ccw = cqr->cpaddr; | |
3836 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
8e09f215 | 3837 | ccw->count = sizeof(struct dasd_psf_prssd_data); |
1da177e4 LT |
3838 | ccw->flags |= CCW_FLAG_CC; |
3839 | ccw->cda = (__u32)(addr_t) prssdp; | |
3840 | ||
3841 | /* Read Subsystem Data - Performance Statistics */ | |
3842 | stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); | |
8e09f215 | 3843 | memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); |
1da177e4 LT |
3844 | |
3845 | ccw++; | |
3846 | ccw->cmd_code = DASD_ECKD_CCW_RSSD; | |
8e09f215 | 3847 | ccw->count = sizeof(struct dasd_rssd_perf_stats_t); |
1da177e4 LT |
3848 | ccw->cda = (__u32)(addr_t) stats; |
3849 | ||
1aae0560 | 3850 | cqr->buildclk = get_tod_clock(); |
1da177e4 LT |
3851 | cqr->status = DASD_CQR_FILLED; |
3852 | rc = dasd_sleep_on(cqr); | |
3853 | if (rc == 0) { | |
1da177e4 LT |
3854 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; |
3855 | stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); | |
1107ccfb CH |
3856 | if (copy_to_user(argp, stats, |
3857 | sizeof(struct dasd_rssd_perf_stats_t))) | |
3858 | rc = -EFAULT; | |
1da177e4 | 3859 | } |
8e09f215 | 3860 | dasd_sfree_request(cqr, cqr->memdev); |
1da177e4 LT |
3861 | return rc; |
3862 | } | |
3863 | ||
3864 | /* | |
3865 | * Get attributes (cache operations) | |
3866 | * Returnes the cache attributes used in Define Extend (DE). | |
3867 | */ | |
3868 | static int | |
1107ccfb | 3869 | dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) |
1da177e4 | 3870 | { |
1107ccfb CH |
3871 | struct dasd_eckd_private *private = |
3872 | (struct dasd_eckd_private *)device->private; | |
3873 | struct attrib_data_t attrib = private->attrib; | |
1da177e4 LT |
3874 | int rc; |
3875 | ||
3876 | if (!capable(CAP_SYS_ADMIN)) | |
3877 | return -EACCES; | |
1107ccfb | 3878 | if (!argp) |
1da177e4 LT |
3879 | return -EINVAL; |
3880 | ||
1107ccfb CH |
3881 | rc = 0; |
3882 | if (copy_to_user(argp, (long *) &attrib, | |
8e09f215 | 3883 | sizeof(struct attrib_data_t))) |
1107ccfb | 3884 | rc = -EFAULT; |
1da177e4 LT |
3885 | |
3886 | return rc; | |
3887 | } | |
3888 | ||
3889 | /* | |
3890 | * Set attributes (cache operations) | |
3891 | * Stores the attributes for cache operation to be used in Define Extend (DE). | |
3892 | */ | |
3893 | static int | |
1107ccfb | 3894 | dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) |
1da177e4 | 3895 | { |
1107ccfb CH |
3896 | struct dasd_eckd_private *private = |
3897 | (struct dasd_eckd_private *)device->private; | |
1da177e4 LT |
3898 | struct attrib_data_t attrib; |
3899 | ||
3900 | if (!capable(CAP_SYS_ADMIN)) | |
3901 | return -EACCES; | |
1107ccfb | 3902 | if (!argp) |
1da177e4 LT |
3903 | return -EINVAL; |
3904 | ||
1107ccfb | 3905 | if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) |
1da177e4 | 3906 | return -EFAULT; |
1da177e4 LT |
3907 | private->attrib = attrib; |
3908 | ||
fc19f381 SH |
3909 | dev_info(&device->cdev->dev, |
3910 | "The DASD cache mode was set to %x (%i cylinder prestage)\n", | |
3911 | private->attrib.operation, private->attrib.nr_cyl); | |
1da177e4 LT |
3912 | return 0; |
3913 | } | |
3914 | ||
ab1d848f NH |
3915 | /* |
3916 | * Issue syscall I/O to EMC Symmetrix array. | |
3917 | * CCWs are PSF and RSSD | |
3918 | */ | |
3919 | static int dasd_symm_io(struct dasd_device *device, void __user *argp) | |
3920 | { | |
3921 | struct dasd_symmio_parms usrparm; | |
3922 | char *psf_data, *rssd_result; | |
3923 | struct dasd_ccw_req *cqr; | |
3924 | struct ccw1 *ccw; | |
52898025 | 3925 | char psf0, psf1; |
ab1d848f NH |
3926 | int rc; |
3927 | ||
52898025 NH |
3928 | if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) |
3929 | return -EACCES; | |
3930 | psf0 = psf1 = 0; | |
3931 | ||
ab1d848f NH |
3932 | /* Copy parms from caller */ |
3933 | rc = -EFAULT; | |
3934 | if (copy_from_user(&usrparm, argp, sizeof(usrparm))) | |
3935 | goto out; | |
f8b06859 HC |
3936 | if (is_compat_task() || sizeof(long) == 4) { |
3937 | /* Make sure pointers are sane even on 31 bit. */ | |
ab1d848f | 3938 | rc = -EINVAL; |
f8b06859 HC |
3939 | if ((usrparm.psf_data >> 32) != 0) |
3940 | goto out; | |
3941 | if ((usrparm.rssd_result >> 32) != 0) | |
3942 | goto out; | |
3943 | usrparm.psf_data &= 0x7fffffffULL; | |
3944 | usrparm.rssd_result &= 0x7fffffffULL; | |
ab1d848f | 3945 | } |
ab1d848f NH |
3946 | /* alloc I/O data area */ |
3947 | psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); | |
3948 | rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); | |
3949 | if (!psf_data || !rssd_result) { | |
3950 | rc = -ENOMEM; | |
3951 | goto out_free; | |
3952 | } | |
3953 | ||
3954 | /* get syscall header from user space */ | |
3955 | rc = -EFAULT; | |
3956 | if (copy_from_user(psf_data, | |
3957 | (void __user *)(unsigned long) usrparm.psf_data, | |
3958 | usrparm.psf_data_len)) | |
3959 | goto out_free; | |
52898025 NH |
3960 | psf0 = psf_data[0]; |
3961 | psf1 = psf_data[1]; | |
ab1d848f NH |
3962 | |
3963 | /* setup CCWs for PSF + RSSD */ | |
68b781fe | 3964 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device); |
ab1d848f | 3965 | if (IS_ERR(cqr)) { |
fc19f381 | 3966 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
ab1d848f NH |
3967 | "Could not allocate initialization request"); |
3968 | rc = PTR_ERR(cqr); | |
3969 | goto out_free; | |
3970 | } | |
3971 | ||
3972 | cqr->startdev = device; | |
3973 | cqr->memdev = device; | |
3974 | cqr->retries = 3; | |
3975 | cqr->expires = 10 * HZ; | |
1aae0560 | 3976 | cqr->buildclk = get_tod_clock(); |
ab1d848f NH |
3977 | cqr->status = DASD_CQR_FILLED; |
3978 | ||
3979 | /* Build the ccws */ | |
3980 | ccw = cqr->cpaddr; | |
3981 | ||
3982 | /* PSF ccw */ | |
3983 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
3984 | ccw->count = usrparm.psf_data_len; | |
3985 | ccw->flags |= CCW_FLAG_CC; | |
3986 | ccw->cda = (__u32)(addr_t) psf_data; | |
3987 | ||
3988 | ccw++; | |
3989 | ||
3990 | /* RSSD ccw */ | |
3991 | ccw->cmd_code = DASD_ECKD_CCW_RSSD; | |
3992 | ccw->count = usrparm.rssd_result_len; | |
3993 | ccw->flags = CCW_FLAG_SLI ; | |
3994 | ccw->cda = (__u32)(addr_t) rssd_result; | |
3995 | ||
3996 | rc = dasd_sleep_on(cqr); | |
3997 | if (rc) | |
3998 | goto out_sfree; | |
3999 | ||
4000 | rc = -EFAULT; | |
4001 | if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, | |
4002 | rssd_result, usrparm.rssd_result_len)) | |
4003 | goto out_sfree; | |
4004 | rc = 0; | |
4005 | ||
4006 | out_sfree: | |
4007 | dasd_sfree_request(cqr, cqr->memdev); | |
4008 | out_free: | |
4009 | kfree(rssd_result); | |
4010 | kfree(psf_data); | |
4011 | out: | |
52898025 NH |
4012 | DBF_DEV_EVENT(DBF_WARNING, device, |
4013 | "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", | |
4014 | (int) psf0, (int) psf1, rc); | |
ab1d848f NH |
4015 | return rc; |
4016 | } | |
4017 | ||
1107ccfb | 4018 | static int |
8e09f215 | 4019 | dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) |
1107ccfb | 4020 | { |
8e09f215 SW |
4021 | struct dasd_device *device = block->base; |
4022 | ||
1107ccfb CH |
4023 | switch (cmd) { |
4024 | case BIODASDGATTR: | |
4025 | return dasd_eckd_get_attrib(device, argp); | |
4026 | case BIODASDSATTR: | |
4027 | return dasd_eckd_set_attrib(device, argp); | |
4028 | case BIODASDPSRD: | |
4029 | return dasd_eckd_performance(device, argp); | |
4030 | case BIODASDRLSE: | |
4031 | return dasd_eckd_release(device); | |
4032 | case BIODASDRSRV: | |
4033 | return dasd_eckd_reserve(device); | |
4034 | case BIODASDSLCK: | |
4035 | return dasd_eckd_steal_lock(device); | |
196339f1 SW |
4036 | case BIODASDSNID: |
4037 | return dasd_eckd_snid(device, argp); | |
ab1d848f NH |
4038 | case BIODASDSYMMIO: |
4039 | return dasd_symm_io(device, argp); | |
1107ccfb | 4040 | default: |
6b79d14e | 4041 | return -ENOTTY; |
1107ccfb CH |
4042 | } |
4043 | } | |
4044 | ||
445b5b49 HH |
4045 | /* |
4046 | * Dump the range of CCWs into 'page' buffer | |
4047 | * and return number of printed chars. | |
4048 | */ | |
4d284cac | 4049 | static int |
445b5b49 HH |
4050 | dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) |
4051 | { | |
4052 | int len, count; | |
4053 | char *datap; | |
4054 | ||
4055 | len = 0; | |
4056 | while (from <= to) { | |
773bab4a | 4057 | len += sprintf(page + len, PRINTK_HEADER |
445b5b49 HH |
4058 | " CCW %p: %08X %08X DAT:", |
4059 | from, ((int *) from)[0], ((int *) from)[1]); | |
4060 | ||
4061 | /* get pointer to data (consider IDALs) */ | |
4062 | if (from->flags & CCW_FLAG_IDA) | |
4063 | datap = (char *) *((addr_t *) (addr_t) from->cda); | |
4064 | else | |
4065 | datap = (char *) ((addr_t) from->cda); | |
4066 | ||
4067 | /* dump data (max 32 bytes) */ | |
4068 | for (count = 0; count < from->count && count < 32; count++) { | |
4069 | if (count % 8 == 0) len += sprintf(page + len, " "); | |
4070 | if (count % 4 == 0) len += sprintf(page + len, " "); | |
4071 | len += sprintf(page + len, "%02x", datap[count]); | |
4072 | } | |
4073 | len += sprintf(page + len, "\n"); | |
4074 | from++; | |
4075 | } | |
4076 | return len; | |
4077 | } | |
4078 | ||
fc19f381 | 4079 | static void |
aeec92ca SH |
4080 | dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, |
4081 | char *reason) | |
fc19f381 SH |
4082 | { |
4083 | u64 *sense; | |
a5a0061f | 4084 | u64 *stat; |
aeec92ca SH |
4085 | |
4086 | sense = (u64 *) dasd_get_sense(irb); | |
a5a0061f | 4087 | stat = (u64 *) &irb->scsw; |
fc19f381 | 4088 | if (sense) { |
a5a0061f SW |
4089 | DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " |
4090 | "%016llx %016llx %016llx %016llx", | |
4091 | reason, *stat, *((u32 *) (stat + 1)), | |
ed3640b2 | 4092 | sense[0], sense[1], sense[2], sense[3]); |
fc19f381 | 4093 | } else { |
a5a0061f SW |
4094 | DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", |
4095 | reason, *stat, *((u32 *) (stat + 1)), | |
4096 | "NO VALID SENSE"); | |
fc19f381 SH |
4097 | } |
4098 | } | |
4099 | ||
1da177e4 LT |
4100 | /* |
4101 | * Print sense data and related channel program. | |
4102 | * Parts are printed because printk buffer is only 1024 bytes. | |
4103 | */ | |
f3eb5384 | 4104 | static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, |
8e09f215 | 4105 | struct dasd_ccw_req *req, struct irb *irb) |
1da177e4 LT |
4106 | { |
4107 | char *page; | |
445b5b49 HH |
4108 | struct ccw1 *first, *last, *fail, *from, *to; |
4109 | int len, sl, sct; | |
1da177e4 LT |
4110 | |
4111 | page = (char *) get_zeroed_page(GFP_ATOMIC); | |
4112 | if (page == NULL) { | |
fc19f381 SH |
4113 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
4114 | "No memory to dump sense data\n"); | |
1da177e4 LT |
4115 | return; |
4116 | } | |
445b5b49 | 4117 | /* dump the sense data */ |
773bab4a | 4118 | len = sprintf(page, PRINTK_HEADER |
1da177e4 | 4119 | " I/O status report for device %s:\n", |
2a0217d5 | 4120 | dev_name(&device->cdev->dev)); |
773bab4a | 4121 | len += sprintf(page + len, PRINTK_HEADER |
a5a0061f SW |
4122 | " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " |
4123 | "CS:%02X RC:%d\n", | |
4124 | req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), | |
4125 | scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), | |
4126 | scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), | |
4127 | req ? req->intrc : 0); | |
773bab4a | 4128 | len += sprintf(page + len, PRINTK_HEADER |
1da177e4 | 4129 | " device %s: Failing CCW: %p\n", |
2a0217d5 | 4130 | dev_name(&device->cdev->dev), |
23d805b6 | 4131 | (void *) (addr_t) irb->scsw.cmd.cpa); |
1da177e4 LT |
4132 | if (irb->esw.esw0.erw.cons) { |
4133 | for (sl = 0; sl < 4; sl++) { | |
773bab4a | 4134 | len += sprintf(page + len, PRINTK_HEADER |
1da177e4 LT |
4135 | " Sense(hex) %2d-%2d:", |
4136 | (8 * sl), ((8 * sl) + 7)); | |
4137 | ||
4138 | for (sct = 0; sct < 8; sct++) { | |
4139 | len += sprintf(page + len, " %02x", | |
4140 | irb->ecw[8 * sl + sct]); | |
4141 | } | |
4142 | len += sprintf(page + len, "\n"); | |
4143 | } | |
4144 | ||
4145 | if (irb->ecw[27] & DASD_SENSE_BIT_0) { | |
4146 | /* 24 Byte Sense Data */ | |
773bab4a | 4147 | sprintf(page + len, PRINTK_HEADER |
445b5b49 HH |
4148 | " 24 Byte: %x MSG %x, " |
4149 | "%s MSGb to SYSOP\n", | |
4150 | irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, | |
4151 | irb->ecw[1] & 0x10 ? "" : "no"); | |
1da177e4 LT |
4152 | } else { |
4153 | /* 32 Byte Sense Data */ | |
773bab4a | 4154 | sprintf(page + len, PRINTK_HEADER |
445b5b49 HH |
4155 | " 32 Byte: Format: %x " |
4156 | "Exception class %x\n", | |
4157 | irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); | |
1da177e4 LT |
4158 | } |
4159 | } else { | |
773bab4a | 4160 | sprintf(page + len, PRINTK_HEADER |
445b5b49 | 4161 | " SORRY - NO VALID SENSE AVAILABLE\n"); |
1da177e4 | 4162 | } |
773bab4a | 4163 | printk(KERN_ERR "%s", page); |
445b5b49 | 4164 | |
8e09f215 SW |
4165 | if (req) { |
4166 | /* req == NULL for unsolicited interrupts */ | |
4167 | /* dump the Channel Program (max 140 Bytes per line) */ | |
4168 | /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ | |
4169 | first = req->cpaddr; | |
4170 | for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); | |
4171 | to = min(first + 6, last); | |
773bab4a | 4172 | len = sprintf(page, PRINTK_HEADER |
8e09f215 SW |
4173 | " Related CP in req: %p\n", req); |
4174 | dasd_eckd_dump_ccw_range(first, to, page + len); | |
773bab4a | 4175 | printk(KERN_ERR "%s", page); |
1da177e4 | 4176 | |
8e09f215 SW |
4177 | /* print failing CCW area (maximum 4) */ |
4178 | /* scsw->cda is either valid or zero */ | |
4179 | len = 0; | |
4180 | from = ++to; | |
23d805b6 PO |
4181 | fail = (struct ccw1 *)(addr_t) |
4182 | irb->scsw.cmd.cpa; /* failing CCW */ | |
8e09f215 SW |
4183 | if (from < fail - 2) { |
4184 | from = fail - 2; /* there is a gap - print header */ | |
773bab4a | 4185 | len += sprintf(page, PRINTK_HEADER "......\n"); |
8e09f215 SW |
4186 | } |
4187 | to = min(fail + 1, last); | |
4188 | len += dasd_eckd_dump_ccw_range(from, to, page + len); | |
4189 | ||
4190 | /* print last CCWs (maximum 2) */ | |
4191 | from = max(from, ++to); | |
4192 | if (from < last - 1) { | |
4193 | from = last - 1; /* there is a gap - print header */ | |
773bab4a | 4194 | len += sprintf(page + len, PRINTK_HEADER "......\n"); |
8e09f215 SW |
4195 | } |
4196 | len += dasd_eckd_dump_ccw_range(from, last, page + len); | |
4197 | if (len > 0) | |
773bab4a | 4198 | printk(KERN_ERR "%s", page); |
1da177e4 | 4199 | } |
1da177e4 LT |
4200 | free_page((unsigned long) page); |
4201 | } | |
4202 | ||
f3eb5384 SW |
4203 | |
4204 | /* | |
4205 | * Print sense data from a tcw. | |
4206 | */ | |
4207 | static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, | |
4208 | struct dasd_ccw_req *req, struct irb *irb) | |
4209 | { | |
4210 | char *page; | |
4211 | int len, sl, sct, residual; | |
f3eb5384 | 4212 | struct tsb *tsb; |
ef19298b | 4213 | u8 *sense, *rcq; |
f3eb5384 SW |
4214 | |
4215 | page = (char *) get_zeroed_page(GFP_ATOMIC); | |
4216 | if (page == NULL) { | |
fc19f381 | 4217 | DBF_DEV_EVENT(DBF_WARNING, device, " %s", |
f3eb5384 SW |
4218 | "No memory to dump sense data"); |
4219 | return; | |
4220 | } | |
4221 | /* dump the sense data */ | |
773bab4a | 4222 | len = sprintf(page, PRINTK_HEADER |
f3eb5384 SW |
4223 | " I/O status report for device %s:\n", |
4224 | dev_name(&device->cdev->dev)); | |
773bab4a | 4225 | len += sprintf(page + len, PRINTK_HEADER |
a5a0061f SW |
4226 | " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " |
4227 | "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", | |
4228 | req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), | |
4229 | scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), | |
4230 | scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), | |
4231 | irb->scsw.tm.fcxs, irb->scsw.tm.schxs, | |
4232 | req ? req->intrc : 0); | |
773bab4a | 4233 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4234 | " device %s: Failing TCW: %p\n", |
4235 | dev_name(&device->cdev->dev), | |
4236 | (void *) (addr_t) irb->scsw.tm.tcw); | |
4237 | ||
4238 | tsb = NULL; | |
4239 | sense = NULL; | |
a5a0061f | 4240 | if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) |
f3eb5384 SW |
4241 | tsb = tcw_get_tsb( |
4242 | (struct tcw *)(unsigned long)irb->scsw.tm.tcw); | |
4243 | ||
b8fde722 | 4244 | if (tsb) { |
773bab4a | 4245 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 | 4246 | " tsb->length %d\n", tsb->length); |
773bab4a | 4247 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 | 4248 | " tsb->flags %x\n", tsb->flags); |
773bab4a | 4249 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 | 4250 | " tsb->dcw_offset %d\n", tsb->dcw_offset); |
773bab4a | 4251 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4252 | " tsb->count %d\n", tsb->count); |
4253 | residual = tsb->count - 28; | |
773bab4a | 4254 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4255 | " residual %d\n", residual); |
4256 | ||
4257 | switch (tsb->flags & 0x07) { | |
4258 | case 1: /* tsa_iostat */ | |
773bab4a | 4259 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4260 | " tsb->tsa.iostat.dev_time %d\n", |
4261 | tsb->tsa.iostat.dev_time); | |
773bab4a | 4262 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4263 | " tsb->tsa.iostat.def_time %d\n", |
4264 | tsb->tsa.iostat.def_time); | |
773bab4a | 4265 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4266 | " tsb->tsa.iostat.queue_time %d\n", |
4267 | tsb->tsa.iostat.queue_time); | |
773bab4a | 4268 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4269 | " tsb->tsa.iostat.dev_busy_time %d\n", |
4270 | tsb->tsa.iostat.dev_busy_time); | |
773bab4a | 4271 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4272 | " tsb->tsa.iostat.dev_act_time %d\n", |
4273 | tsb->tsa.iostat.dev_act_time); | |
4274 | sense = tsb->tsa.iostat.sense; | |
4275 | break; | |
4276 | case 2: /* ts_ddpc */ | |
773bab4a | 4277 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 | 4278 | " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); |
ef19298b | 4279 | for (sl = 0; sl < 2; sl++) { |
773bab4a | 4280 | len += sprintf(page + len, PRINTK_HEADER |
ef19298b SW |
4281 | " tsb->tsa.ddpc.rcq %2d-%2d: ", |
4282 | (8 * sl), ((8 * sl) + 7)); | |
4283 | rcq = tsb->tsa.ddpc.rcq; | |
f3eb5384 SW |
4284 | for (sct = 0; sct < 8; sct++) { |
4285 | len += sprintf(page + len, " %02x", | |
ef19298b | 4286 | rcq[8 * sl + sct]); |
f3eb5384 SW |
4287 | } |
4288 | len += sprintf(page + len, "\n"); | |
4289 | } | |
4290 | sense = tsb->tsa.ddpc.sense; | |
4291 | break; | |
4292 | case 3: /* tsa_intrg */ | |
773bab4a SO |
4293 | len += sprintf(page + len, PRINTK_HEADER |
4294 | " tsb->tsa.intrg.: not supportet yet\n"); | |
f3eb5384 SW |
4295 | break; |
4296 | } | |
4297 | ||
4298 | if (sense) { | |
4299 | for (sl = 0; sl < 4; sl++) { | |
773bab4a | 4300 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4301 | " Sense(hex) %2d-%2d:", |
4302 | (8 * sl), ((8 * sl) + 7)); | |
4303 | for (sct = 0; sct < 8; sct++) { | |
4304 | len += sprintf(page + len, " %02x", | |
4305 | sense[8 * sl + sct]); | |
4306 | } | |
4307 | len += sprintf(page + len, "\n"); | |
4308 | } | |
4309 | ||
4310 | if (sense[27] & DASD_SENSE_BIT_0) { | |
4311 | /* 24 Byte Sense Data */ | |
773bab4a | 4312 | sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4313 | " 24 Byte: %x MSG %x, " |
4314 | "%s MSGb to SYSOP\n", | |
4315 | sense[7] >> 4, sense[7] & 0x0f, | |
4316 | sense[1] & 0x10 ? "" : "no"); | |
4317 | } else { | |
4318 | /* 32 Byte Sense Data */ | |
773bab4a | 4319 | sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4320 | " 32 Byte: Format: %x " |
4321 | "Exception class %x\n", | |
4322 | sense[6] & 0x0f, sense[22] >> 4); | |
4323 | } | |
4324 | } else { | |
773bab4a | 4325 | sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4326 | " SORRY - NO VALID SENSE AVAILABLE\n"); |
4327 | } | |
4328 | } else { | |
773bab4a | 4329 | sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4330 | " SORRY - NO TSB DATA AVAILABLE\n"); |
4331 | } | |
773bab4a | 4332 | printk(KERN_ERR "%s", page); |
f3eb5384 SW |
4333 | free_page((unsigned long) page); |
4334 | } | |
4335 | ||
4336 | static void dasd_eckd_dump_sense(struct dasd_device *device, | |
4337 | struct dasd_ccw_req *req, struct irb *irb) | |
4338 | { | |
a5a0061f | 4339 | if (scsw_is_tm(&irb->scsw)) |
f3eb5384 SW |
4340 | dasd_eckd_dump_sense_tcw(device, req, irb); |
4341 | else | |
4342 | dasd_eckd_dump_sense_ccw(device, req, irb); | |
4343 | } | |
4344 | ||
501183f2 | 4345 | static int dasd_eckd_pm_freeze(struct dasd_device *device) |
d41dd122 SH |
4346 | { |
4347 | /* | |
4348 | * the device should be disconnected from our LCU structure | |
4349 | * on restore we will reconnect it and reread LCU specific | |
4350 | * information like PAV support that might have changed | |
4351 | */ | |
4352 | dasd_alias_remove_device(device); | |
4353 | dasd_alias_disconnect_device_from_lcu(device); | |
4354 | ||
4355 | return 0; | |
4356 | } | |
4357 | ||
501183f2 | 4358 | static int dasd_eckd_restore_device(struct dasd_device *device) |
d41dd122 SH |
4359 | { |
4360 | struct dasd_eckd_private *private; | |
6fca97a9 | 4361 | struct dasd_eckd_characteristics temp_rdc_data; |
f9f8d02f | 4362 | int rc; |
d41dd122 | 4363 | struct dasd_uid temp_uid; |
a7602f6c | 4364 | unsigned long flags; |
ea4da6ea | 4365 | unsigned long cqr_flags = 0; |
d41dd122 | 4366 | |
d41dd122 SH |
4367 | private = (struct dasd_eckd_private *) device->private; |
4368 | ||
4369 | /* Read Configuration Data */ | |
55d3a85c | 4370 | dasd_eckd_read_conf(device); |
d41dd122 | 4371 | |
2dedf0d9 SH |
4372 | dasd_eckd_get_uid(device, &temp_uid); |
4373 | /* Generate device unique id */ | |
4374 | rc = dasd_eckd_generate_uid(device); | |
4375 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); | |
d41dd122 | 4376 | if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) |
a7602f6c SH |
4377 | dev_err(&device->cdev->dev, "The UID of the DASD has " |
4378 | "changed\n"); | |
2dedf0d9 | 4379 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
d41dd122 SH |
4380 | if (rc) |
4381 | goto out_err; | |
d41dd122 SH |
4382 | |
4383 | /* register lcu with alias handling, enable PAV if this is a new lcu */ | |
f9f8d02f SH |
4384 | rc = dasd_alias_make_device_known_to_lcu(device); |
4385 | if (rc) | |
4386 | return rc; | |
ea4da6ea SH |
4387 | |
4388 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags); | |
4389 | dasd_eckd_validate_server(device, cqr_flags); | |
f4ac1d02 SW |
4390 | |
4391 | /* RE-Read Configuration Data */ | |
55d3a85c | 4392 | dasd_eckd_read_conf(device); |
d41dd122 SH |
4393 | |
4394 | /* Read Feature Codes */ | |
68d1e5f0 | 4395 | dasd_eckd_read_features(device); |
d41dd122 SH |
4396 | |
4397 | /* Read Device Characteristics */ | |
68b781fe | 4398 | rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, |
6fca97a9 | 4399 | &temp_rdc_data, 64); |
d41dd122 | 4400 | if (rc) { |
b8ed5dd5 SH |
4401 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, |
4402 | "Read device characteristic failed, rc=%d", rc); | |
d41dd122 SH |
4403 | goto out_err; |
4404 | } | |
a7602f6c | 4405 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); |
6fca97a9 | 4406 | memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); |
a7602f6c | 4407 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
d41dd122 SH |
4408 | |
4409 | /* add device to alias management */ | |
4410 | dasd_alias_add_device(device); | |
4411 | ||
4412 | return 0; | |
4413 | ||
4414 | out_err: | |
e6125fba | 4415 | return -1; |
d41dd122 SH |
4416 | } |
4417 | ||
501183f2 SH |
4418 | static int dasd_eckd_reload_device(struct dasd_device *device) |
4419 | { | |
4420 | struct dasd_eckd_private *private; | |
4421 | int rc, old_base; | |
2dedf0d9 SH |
4422 | char print_uid[60]; |
4423 | struct dasd_uid uid; | |
4424 | unsigned long flags; | |
501183f2 SH |
4425 | |
4426 | private = (struct dasd_eckd_private *) device->private; | |
2dedf0d9 SH |
4427 | |
4428 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); | |
501183f2 | 4429 | old_base = private->uid.base_unit_addr; |
2dedf0d9 SH |
4430 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
4431 | ||
501183f2 SH |
4432 | /* Read Configuration Data */ |
4433 | rc = dasd_eckd_read_conf(device); | |
4434 | if (rc) | |
4435 | goto out_err; | |
4436 | ||
2dedf0d9 | 4437 | rc = dasd_eckd_generate_uid(device); |
501183f2 SH |
4438 | if (rc) |
4439 | goto out_err; | |
501183f2 SH |
4440 | /* |
4441 | * update unit address configuration and | |
4442 | * add device to alias management | |
4443 | */ | |
4444 | dasd_alias_update_add_device(device); | |
4445 | ||
2dedf0d9 SH |
4446 | dasd_eckd_get_uid(device, &uid); |
4447 | ||
4448 | if (old_base != uid.base_unit_addr) { | |
4449 | if (strlen(uid.vduit) > 0) | |
4450 | snprintf(print_uid, sizeof(print_uid), | |
4451 | "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, | |
4452 | uid.ssid, uid.base_unit_addr, uid.vduit); | |
501183f2 | 4453 | else |
2dedf0d9 SH |
4454 | snprintf(print_uid, sizeof(print_uid), |
4455 | "%s.%s.%04x.%02x", uid.vendor, uid.serial, | |
4456 | uid.ssid, uid.base_unit_addr); | |
501183f2 SH |
4457 | |
4458 | dev_info(&device->cdev->dev, | |
4459 | "An Alias device was reassigned to a new base device " | |
2dedf0d9 | 4460 | "with UID: %s\n", print_uid); |
501183f2 SH |
4461 | } |
4462 | return 0; | |
4463 | ||
4464 | out_err: | |
4465 | return -1; | |
4466 | } | |
4467 | ||
d41dd122 | 4468 | static struct ccw_driver dasd_eckd_driver = { |
3bda058b SO |
4469 | .driver = { |
4470 | .name = "dasd-eckd", | |
4471 | .owner = THIS_MODULE, | |
4472 | }, | |
d41dd122 SH |
4473 | .ids = dasd_eckd_ids, |
4474 | .probe = dasd_eckd_probe, | |
4475 | .remove = dasd_generic_remove, | |
4476 | .set_offline = dasd_generic_set_offline, | |
4477 | .set_online = dasd_eckd_set_online, | |
4478 | .notify = dasd_generic_notify, | |
a4d26c6a | 4479 | .path_event = dasd_generic_path_event, |
4679e893 | 4480 | .shutdown = dasd_generic_shutdown, |
d41dd122 SH |
4481 | .freeze = dasd_generic_pm_freeze, |
4482 | .thaw = dasd_generic_restore_device, | |
4483 | .restore = dasd_generic_restore_device, | |
a23ed009 | 4484 | .uc_handler = dasd_generic_uc_handler, |
420f42ec | 4485 | .int_class = IRQIO_DAS, |
d41dd122 | 4486 | }; |
f3eb5384 | 4487 | |
1da177e4 LT |
4488 | /* |
4489 | * max_blocks is dependent on the amount of storage that is available | |
4490 | * in the static io buffer for each device. Currently each device has | |
4491 | * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has | |
4492 | * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use | |
4493 | * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In | |
4494 | * addition we have one define extent ccw + 16 bytes of data and one | |
4495 | * locate record ccw + 16 bytes of data. That makes: | |
4496 | * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. | |
4497 | * We want to fit two into the available memory so that we can immediately | |
4498 | * start the next request if one finishes off. That makes 249.5 blocks | |
4499 | * for one request. Give a little safety and the result is 240. | |
4500 | */ | |
4501 | static struct dasd_discipline dasd_eckd_discipline = { | |
4502 | .owner = THIS_MODULE, | |
4503 | .name = "ECKD", | |
4504 | .ebcname = "ECKD", | |
ef19298b | 4505 | .max_blocks = 190, |
1da177e4 | 4506 | .check_device = dasd_eckd_check_characteristics, |
8e09f215 | 4507 | .uncheck_device = dasd_eckd_uncheck_device, |
1da177e4 | 4508 | .do_analysis = dasd_eckd_do_analysis, |
a4d26c6a | 4509 | .verify_path = dasd_eckd_verify_path, |
d42e1712 | 4510 | .basic_to_ready = dasd_eckd_basic_to_ready, |
8e09f215 | 4511 | .online_to_ready = dasd_eckd_online_to_ready, |
d42e1712 | 4512 | .ready_to_basic = dasd_eckd_ready_to_basic, |
1da177e4 LT |
4513 | .fill_geometry = dasd_eckd_fill_geometry, |
4514 | .start_IO = dasd_start_IO, | |
4515 | .term_IO = dasd_term_IO, | |
8e09f215 | 4516 | .handle_terminated_request = dasd_eckd_handle_terminated_request, |
1da177e4 | 4517 | .format_device = dasd_eckd_format_device, |
1da177e4 LT |
4518 | .erp_action = dasd_eckd_erp_action, |
4519 | .erp_postaction = dasd_eckd_erp_postaction, | |
5a27e60d | 4520 | .check_for_device_change = dasd_eckd_check_for_device_change, |
8e09f215 SW |
4521 | .build_cp = dasd_eckd_build_alias_cp, |
4522 | .free_cp = dasd_eckd_free_alias_cp, | |
1da177e4 | 4523 | .dump_sense = dasd_eckd_dump_sense, |
fc19f381 | 4524 | .dump_sense_dbf = dasd_eckd_dump_sense_dbf, |
1da177e4 | 4525 | .fill_info = dasd_eckd_fill_info, |
1107ccfb | 4526 | .ioctl = dasd_eckd_ioctl, |
d41dd122 SH |
4527 | .freeze = dasd_eckd_pm_freeze, |
4528 | .restore = dasd_eckd_restore_device, | |
501183f2 | 4529 | .reload = dasd_eckd_reload_device, |
2dedf0d9 | 4530 | .get_uid = dasd_eckd_get_uid, |
f1633031 | 4531 | .kick_validate = dasd_eckd_kick_validate_server, |
1da177e4 LT |
4532 | }; |
4533 | ||
4534 | static int __init | |
4535 | dasd_eckd_init(void) | |
4536 | { | |
736e6ea0 SO |
4537 | int ret; |
4538 | ||
1da177e4 | 4539 | ASCEBC(dasd_eckd_discipline.ebcname, 4); |
f932bcea SW |
4540 | dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), |
4541 | GFP_KERNEL | GFP_DMA); | |
4542 | if (!dasd_reserve_req) | |
4543 | return -ENOMEM; | |
a4d26c6a SW |
4544 | path_verification_worker = kmalloc(sizeof(*path_verification_worker), |
4545 | GFP_KERNEL | GFP_DMA); | |
4546 | if (!path_verification_worker) { | |
4547 | kfree(dasd_reserve_req); | |
4548 | return -ENOMEM; | |
4549 | } | |
558b9ef0 SW |
4550 | rawpadpage = (void *)__get_free_page(GFP_KERNEL); |
4551 | if (!rawpadpage) { | |
4552 | kfree(path_verification_worker); | |
4553 | kfree(dasd_reserve_req); | |
4554 | return -ENOMEM; | |
4555 | } | |
736e6ea0 SO |
4556 | ret = ccw_driver_register(&dasd_eckd_driver); |
4557 | if (!ret) | |
4558 | wait_for_device_probe(); | |
a4d26c6a SW |
4559 | else { |
4560 | kfree(path_verification_worker); | |
f932bcea | 4561 | kfree(dasd_reserve_req); |
558b9ef0 | 4562 | free_page((unsigned long)rawpadpage); |
a4d26c6a | 4563 | } |
736e6ea0 | 4564 | return ret; |
1da177e4 LT |
4565 | } |
4566 | ||
4567 | static void __exit | |
4568 | dasd_eckd_cleanup(void) | |
4569 | { | |
4570 | ccw_driver_unregister(&dasd_eckd_driver); | |
a4d26c6a | 4571 | kfree(path_verification_worker); |
f932bcea | 4572 | kfree(dasd_reserve_req); |
558b9ef0 | 4573 | free_page((unsigned long)rawpadpage); |
1da177e4 LT |
4574 | } |
4575 | ||
4576 | module_init(dasd_eckd_init); | |
4577 | module_exit(dasd_eckd_cleanup); |