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6a55d2cd | 1 | // SPDX-License-Identifier: GPL-2.0 |
138c014d | 2 | /* |
1da177e4 | 3 | * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> |
138c014d | 4 | * Horst Hummel <Horst.Hummel@de.ibm.com> |
1da177e4 LT |
5 | * Carsten Otte <Cotte@de.ibm.com> |
6 | * Martin Schwidefsky <schwidefsky@de.ibm.com> | |
7 | * Bugreports.to..: <Linux390@de.ibm.com> | |
d41dd122 | 8 | * Copyright IBM Corp. 1999, 2009 |
ab1d848f NH |
9 | * EMC Symmetrix ioctl Copyright EMC Corporation, 2008 |
10 | * Author.........: Nigel Hislop <hislop_nigel@emc.com> | |
1da177e4 LT |
11 | */ |
12 | ||
ca99dab0 | 13 | #define KMSG_COMPONENT "dasd-eckd" |
fc19f381 | 14 | |
1da177e4 LT |
15 | #include <linux/stddef.h> |
16 | #include <linux/kernel.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/hdreg.h> /* HDIO_GETGEO */ | |
19 | #include <linux/bio.h> | |
20 | #include <linux/module.h> | |
048cd4e5 | 21 | #include <linux/compat.h> |
1da177e4 | 22 | #include <linux/init.h> |
5a3b7b11 | 23 | #include <linux/seq_file.h> |
1da177e4 | 24 | |
382b7366 | 25 | #include <asm/css_chars.h> |
1da177e4 LT |
26 | #include <asm/debug.h> |
27 | #include <asm/idals.h> | |
28 | #include <asm/ebcdic.h> | |
29 | #include <asm/io.h> | |
7c0f6ba6 | 30 | #include <linux/uaccess.h> |
40545573 | 31 | #include <asm/cio.h> |
1da177e4 | 32 | #include <asm/ccwdev.h> |
f3eb5384 | 33 | #include <asm/itcw.h> |
5db8440c SH |
34 | #include <asm/schid.h> |
35 | #include <asm/chpid.h> | |
1da177e4 LT |
36 | |
37 | #include "dasd_int.h" | |
38 | #include "dasd_eckd.h" | |
39 | ||
40 | #ifdef PRINTK_HEADER | |
41 | #undef PRINTK_HEADER | |
42 | #endif /* PRINTK_HEADER */ | |
43 | #define PRINTK_HEADER "dasd(eckd):" | |
44 | ||
e4dbb0f2 SH |
45 | /* |
46 | * raw track access always map to 64k in memory | |
47 | * so it maps to 16 blocks of 4k per track | |
48 | */ | |
49 | #define DASD_RAW_BLOCK_PER_TRACK 16 | |
50 | #define DASD_RAW_BLOCKSIZE 4096 | |
51 | /* 64k are 128 x 512 byte sectors */ | |
52 | #define DASD_RAW_SECTORS_PER_TRACK 128 | |
53 | ||
1da177e4 LT |
54 | MODULE_LICENSE("GPL"); |
55 | ||
56 | static struct dasd_discipline dasd_eckd_discipline; | |
57 | ||
1da177e4 LT |
58 | /* The ccw bus type uses this table to find devices that it sends to |
59 | * dasd_eckd_probe */ | |
60 | static struct ccw_device_id dasd_eckd_ids[] = { | |
d2c993d8 HC |
61 | { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1}, |
62 | { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2}, | |
5da24b76 | 63 | { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info = 0x3}, |
d2c993d8 HC |
64 | { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4}, |
65 | { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5}, | |
66 | { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6}, | |
67 | { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7}, | |
68 | { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8}, | |
69 | { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9}, | |
70 | { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa}, | |
1da177e4 LT |
71 | { /* end of list */ }, |
72 | }; | |
73 | ||
74 | MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids); | |
75 | ||
76 | static struct ccw_driver dasd_eckd_driver; /* see below */ | |
77 | ||
558b9ef0 SW |
78 | static void *rawpadpage; |
79 | ||
eb6e199b SW |
80 | #define INIT_CQR_OK 0 |
81 | #define INIT_CQR_UNFORMATTED 1 | |
82 | #define INIT_CQR_ERROR 2 | |
83 | ||
f932bcea SW |
84 | /* emergency request for reserve/release */ |
85 | static struct { | |
86 | struct dasd_ccw_req cqr; | |
87 | struct ccw1 ccw; | |
88 | char data[32]; | |
89 | } *dasd_reserve_req; | |
90 | static DEFINE_MUTEX(dasd_reserve_mutex); | |
91 | ||
9e12e54c JH |
92 | static struct { |
93 | struct dasd_ccw_req cqr; | |
94 | struct ccw1 ccw[2]; | |
95 | char data[40]; | |
96 | } *dasd_vol_info_req; | |
97 | static DEFINE_MUTEX(dasd_vol_info_mutex); | |
98 | ||
99 | struct ext_pool_exhaust_work_data { | |
100 | struct work_struct worker; | |
101 | struct dasd_device *device; | |
102 | struct dasd_device *base; | |
103 | }; | |
104 | ||
a4d26c6a SW |
105 | /* definitions for the path verification worker */ |
106 | struct path_verification_work_data { | |
107 | struct work_struct worker; | |
108 | struct dasd_device *device; | |
109 | struct dasd_ccw_req cqr; | |
110 | struct ccw1 ccw; | |
111 | __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE]; | |
112 | int isglobal; | |
113 | __u8 tbvpm; | |
114 | }; | |
115 | static struct path_verification_work_data *path_verification_worker; | |
116 | static DEFINE_MUTEX(dasd_path_verification_mutex); | |
eb6e199b | 117 | |
5db8440c SH |
118 | struct check_attention_work_data { |
119 | struct work_struct worker; | |
120 | struct dasd_device *device; | |
121 | __u8 lpum; | |
122 | }; | |
123 | ||
c729696b | 124 | static int dasd_eckd_ext_pool_id(struct dasd_device *); |
8fd57520 JH |
125 | static int prepare_itcw(struct itcw *, unsigned int, unsigned int, int, |
126 | struct dasd_device *, struct dasd_device *, | |
127 | unsigned int, int, unsigned int, unsigned int, | |
128 | unsigned int, unsigned int); | |
129 | ||
1da177e4 LT |
130 | /* initial attempt at a probe function. this can be simplified once |
131 | * the other detection code is gone */ | |
132 | static int | |
133 | dasd_eckd_probe (struct ccw_device *cdev) | |
134 | { | |
135 | int ret; | |
136 | ||
40545573 | 137 | /* set ECKD specific ccw-device options */ |
454e1fa1 PO |
138 | ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE | |
139 | CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH); | |
40545573 | 140 | if (ret) { |
b8ed5dd5 SH |
141 | DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", |
142 | "dasd_eckd_probe: could not set " | |
143 | "ccw-device options"); | |
1da177e4 | 144 | return ret; |
40545573 HH |
145 | } |
146 | ret = dasd_generic_probe(cdev, &dasd_eckd_discipline); | |
147 | return ret; | |
1da177e4 LT |
148 | } |
149 | ||
150 | static int | |
151 | dasd_eckd_set_online(struct ccw_device *cdev) | |
152 | { | |
40545573 | 153 | return dasd_generic_set_online(cdev, &dasd_eckd_discipline); |
1da177e4 LT |
154 | } |
155 | ||
1da177e4 LT |
156 | static const int sizes_trk0[] = { 28, 148, 84 }; |
157 | #define LABEL_SIZE 140 | |
158 | ||
3bc9fef9 | 159 | /* head and record addresses of count_area read in analysis ccw */ |
ce6915f5 | 160 | static const int count_area_head[] = { 0, 0, 0, 0, 1 }; |
3bc9fef9 SH |
161 | static const int count_area_rec[] = { 1, 2, 3, 4, 1 }; |
162 | ||
1da177e4 LT |
163 | static inline unsigned int |
164 | ceil_quot(unsigned int d1, unsigned int d2) | |
165 | { | |
166 | return (d1 + (d2 - 1)) / d2; | |
167 | } | |
168 | ||
4d284cac | 169 | static unsigned int |
1da177e4 LT |
170 | recs_per_track(struct dasd_eckd_characteristics * rdc, |
171 | unsigned int kl, unsigned int dl) | |
172 | { | |
173 | int dn, kn; | |
174 | ||
175 | switch (rdc->dev_type) { | |
176 | case 0x3380: | |
177 | if (kl) | |
178 | return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + | |
179 | ceil_quot(dl + 12, 32)); | |
180 | else | |
181 | return 1499 / (15 + ceil_quot(dl + 12, 32)); | |
182 | case 0x3390: | |
183 | dn = ceil_quot(dl + 6, 232) + 1; | |
184 | if (kl) { | |
185 | kn = ceil_quot(kl + 6, 232) + 1; | |
186 | return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + | |
187 | 9 + ceil_quot(dl + 6 * dn, 34)); | |
188 | } else | |
189 | return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); | |
190 | case 0x9345: | |
191 | dn = ceil_quot(dl + 6, 232) + 1; | |
192 | if (kl) { | |
193 | kn = ceil_quot(kl + 6, 232) + 1; | |
194 | return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + | |
195 | ceil_quot(dl + 6 * dn, 34)); | |
196 | } else | |
197 | return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); | |
198 | } | |
199 | return 0; | |
200 | } | |
201 | ||
b44b0ab3 SW |
202 | static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) |
203 | { | |
204 | geo->cyl = (__u16) cyl; | |
205 | geo->head = cyl >> 16; | |
206 | geo->head <<= 4; | |
207 | geo->head |= head; | |
208 | } | |
209 | ||
5e6bdd37 SH |
210 | /* |
211 | * calculate failing track from sense data depending if | |
212 | * it is an EAV device or not | |
213 | */ | |
214 | static int dasd_eckd_track_from_irb(struct irb *irb, struct dasd_device *device, | |
215 | sector_t *track) | |
216 | { | |
217 | struct dasd_eckd_private *private = device->private; | |
218 | u8 *sense = NULL; | |
219 | u32 cyl; | |
220 | u8 head; | |
221 | ||
222 | sense = dasd_get_sense(irb); | |
223 | if (!sense) { | |
224 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", | |
225 | "ESE error no sense data\n"); | |
226 | return -EINVAL; | |
227 | } | |
228 | if (!(sense[27] & DASD_SENSE_BIT_2)) { | |
229 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", | |
230 | "ESE error no valid track data\n"); | |
231 | return -EINVAL; | |
232 | } | |
233 | ||
234 | if (sense[27] & DASD_SENSE_BIT_3) { | |
235 | /* enhanced addressing */ | |
236 | cyl = sense[30] << 20; | |
237 | cyl |= (sense[31] & 0xF0) << 12; | |
238 | cyl |= sense[28] << 8; | |
239 | cyl |= sense[29]; | |
240 | } else { | |
241 | cyl = sense[29] << 8; | |
242 | cyl |= sense[30]; | |
243 | } | |
244 | head = sense[31] & 0x0F; | |
245 | *track = cyl * private->rdc_data.trk_per_cyl + head; | |
246 | return 0; | |
247 | } | |
248 | ||
5628683c | 249 | static int set_timestamp(struct ccw1 *ccw, struct DE_eckd_data *data, |
45f186be | 250 | struct dasd_device *device) |
1da177e4 | 251 | { |
543691a4 | 252 | struct dasd_eckd_private *private = device->private; |
d54853ef | 253 | int rc; |
1da177e4 | 254 | |
5628683c SH |
255 | rc = get_phys_clock(&data->ep_sys_time); |
256 | /* | |
257 | * Ignore return code if XRC is not supported or | |
258 | * sync clock is switched off | |
259 | */ | |
260 | if ((rc && !private->rdc_data.facilities.XRC_supported) || | |
261 | rc == -EOPNOTSUPP || rc == -EACCES) | |
d54853ef | 262 | return 0; |
1da177e4 | 263 | |
45f186be | 264 | /* switch on System Time Stamp - needed for XRC Support */ |
d54853ef MS |
265 | data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ |
266 | data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ | |
1da177e4 | 267 | |
45f186be JH |
268 | if (ccw) { |
269 | ccw->count = sizeof(struct DE_eckd_data); | |
270 | ccw->flags |= CCW_FLAG_SLI; | |
271 | } | |
272 | ||
d54853ef MS |
273 | return rc; |
274 | } | |
1da177e4 | 275 | |
4d284cac | 276 | static int |
b44b0ab3 | 277 | define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, |
45f186be JH |
278 | unsigned int totrk, int cmd, struct dasd_device *device, |
279 | int blksize) | |
1da177e4 | 280 | { |
543691a4 | 281 | struct dasd_eckd_private *private = device->private; |
b44b0ab3 | 282 | u16 heads, beghead, endhead; |
45f186be | 283 | u32 begcyl, endcyl; |
d54853ef | 284 | int rc = 0; |
1da177e4 | 285 | |
45f186be JH |
286 | if (ccw) { |
287 | ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; | |
288 | ccw->flags = 0; | |
289 | ccw->count = 16; | |
290 | ccw->cda = (__u32)__pa(data); | |
291 | } | |
1da177e4 | 292 | |
8e09f215 | 293 | memset(data, 0, sizeof(struct DE_eckd_data)); |
1da177e4 LT |
294 | switch (cmd) { |
295 | case DASD_ECKD_CCW_READ_HOME_ADDRESS: | |
296 | case DASD_ECKD_CCW_READ_RECORD_ZERO: | |
297 | case DASD_ECKD_CCW_READ: | |
298 | case DASD_ECKD_CCW_READ_MT: | |
299 | case DASD_ECKD_CCW_READ_CKD: | |
300 | case DASD_ECKD_CCW_READ_CKD_MT: | |
301 | case DASD_ECKD_CCW_READ_KD: | |
302 | case DASD_ECKD_CCW_READ_KD_MT: | |
1da177e4 LT |
303 | data->mask.perm = 0x1; |
304 | data->attributes.operation = private->attrib.operation; | |
305 | break; | |
8fd57520 JH |
306 | case DASD_ECKD_CCW_READ_COUNT: |
307 | data->mask.perm = 0x1; | |
308 | data->attributes.operation = DASD_BYPASS_CACHE; | |
309 | break; | |
45f186be JH |
310 | case DASD_ECKD_CCW_READ_TRACK: |
311 | case DASD_ECKD_CCW_READ_TRACK_DATA: | |
312 | data->mask.perm = 0x1; | |
313 | data->attributes.operation = private->attrib.operation; | |
314 | data->blk_size = 0; | |
315 | break; | |
1da177e4 LT |
316 | case DASD_ECKD_CCW_WRITE: |
317 | case DASD_ECKD_CCW_WRITE_MT: | |
318 | case DASD_ECKD_CCW_WRITE_KD: | |
319 | case DASD_ECKD_CCW_WRITE_KD_MT: | |
320 | data->mask.perm = 0x02; | |
321 | data->attributes.operation = private->attrib.operation; | |
5628683c | 322 | rc = set_timestamp(ccw, data, device); |
1da177e4 LT |
323 | break; |
324 | case DASD_ECKD_CCW_WRITE_CKD: | |
325 | case DASD_ECKD_CCW_WRITE_CKD_MT: | |
326 | data->attributes.operation = DASD_BYPASS_CACHE; | |
5628683c | 327 | rc = set_timestamp(ccw, data, device); |
1da177e4 LT |
328 | break; |
329 | case DASD_ECKD_CCW_ERASE: | |
330 | case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: | |
331 | case DASD_ECKD_CCW_WRITE_RECORD_ZERO: | |
332 | data->mask.perm = 0x3; | |
333 | data->mask.auth = 0x1; | |
334 | data->attributes.operation = DASD_BYPASS_CACHE; | |
5628683c | 335 | rc = set_timestamp(ccw, data, device); |
45f186be JH |
336 | break; |
337 | case DASD_ECKD_CCW_WRITE_FULL_TRACK: | |
338 | data->mask.perm = 0x03; | |
339 | data->attributes.operation = private->attrib.operation; | |
340 | data->blk_size = 0; | |
341 | break; | |
342 | case DASD_ECKD_CCW_WRITE_TRACK_DATA: | |
343 | data->mask.perm = 0x02; | |
344 | data->attributes.operation = private->attrib.operation; | |
345 | data->blk_size = blksize; | |
5628683c | 346 | rc = set_timestamp(ccw, data, device); |
1da177e4 LT |
347 | break; |
348 | default: | |
fc19f381 SH |
349 | dev_err(&device->cdev->dev, |
350 | "0x%x is not a known command\n", cmd); | |
1da177e4 LT |
351 | break; |
352 | } | |
353 | ||
354 | data->attributes.mode = 0x3; /* ECKD */ | |
355 | ||
356 | if ((private->rdc_data.cu_type == 0x2105 || | |
357 | private->rdc_data.cu_type == 0x2107 || | |
358 | private->rdc_data.cu_type == 0x1750) | |
359 | && !(private->uses_cdl && trk < 2)) | |
360 | data->ga_extended |= 0x40; /* Regular Data Format Mode */ | |
361 | ||
b44b0ab3 SW |
362 | heads = private->rdc_data.trk_per_cyl; |
363 | begcyl = trk / heads; | |
364 | beghead = trk % heads; | |
365 | endcyl = totrk / heads; | |
366 | endhead = totrk % heads; | |
1da177e4 LT |
367 | |
368 | /* check for sequential prestage - enhance cylinder range */ | |
369 | if (data->attributes.operation == DASD_SEQ_PRESTAGE || | |
370 | data->attributes.operation == DASD_SEQ_ACCESS) { | |
138c014d | 371 | |
b44b0ab3 SW |
372 | if (endcyl + private->attrib.nr_cyl < private->real_cyl) |
373 | endcyl += private->attrib.nr_cyl; | |
1da177e4 | 374 | else |
b44b0ab3 | 375 | endcyl = (private->real_cyl - 1); |
1da177e4 LT |
376 | } |
377 | ||
b44b0ab3 SW |
378 | set_ch_t(&data->beg_ext, begcyl, beghead); |
379 | set_ch_t(&data->end_ext, endcyl, endhead); | |
d54853ef | 380 | return rc; |
1da177e4 LT |
381 | } |
382 | ||
8e09f215 | 383 | |
45f186be JH |
384 | static void locate_record_ext(struct ccw1 *ccw, struct LRE_eckd_data *data, |
385 | unsigned int trk, unsigned int rec_on_trk, | |
386 | int count, int cmd, struct dasd_device *device, | |
387 | unsigned int reclen, unsigned int tlf) | |
f3eb5384 | 388 | { |
543691a4 | 389 | struct dasd_eckd_private *private = device->private; |
f3eb5384 SW |
390 | int sector; |
391 | int dn, d; | |
392 | ||
45f186be JH |
393 | if (ccw) { |
394 | ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD_EXT; | |
395 | ccw->flags = 0; | |
396 | if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) | |
397 | ccw->count = 22; | |
398 | else | |
399 | ccw->count = 20; | |
400 | ccw->cda = (__u32)__pa(data); | |
401 | } | |
402 | ||
f3eb5384 SW |
403 | memset(data, 0, sizeof(*data)); |
404 | sector = 0; | |
405 | if (rec_on_trk) { | |
406 | switch (private->rdc_data.dev_type) { | |
407 | case 0x3390: | |
408 | dn = ceil_quot(reclen + 6, 232); | |
409 | d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); | |
410 | sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; | |
411 | break; | |
412 | case 0x3380: | |
413 | d = 7 + ceil_quot(reclen + 12, 32); | |
414 | sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; | |
415 | break; | |
416 | } | |
417 | } | |
418 | data->sector = sector; | |
419 | /* note: meaning of count depends on the operation | |
420 | * for record based I/O it's the number of records, but for | |
421 | * track based I/O it's the number of tracks | |
422 | */ | |
423 | data->count = count; | |
424 | switch (cmd) { | |
425 | case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: | |
426 | data->operation.orientation = 0x3; | |
427 | data->operation.operation = 0x03; | |
428 | break; | |
429 | case DASD_ECKD_CCW_READ_HOME_ADDRESS: | |
430 | data->operation.orientation = 0x3; | |
431 | data->operation.operation = 0x16; | |
432 | break; | |
433 | case DASD_ECKD_CCW_WRITE_RECORD_ZERO: | |
434 | data->operation.orientation = 0x1; | |
435 | data->operation.operation = 0x03; | |
436 | data->count++; | |
437 | break; | |
438 | case DASD_ECKD_CCW_READ_RECORD_ZERO: | |
439 | data->operation.orientation = 0x3; | |
440 | data->operation.operation = 0x16; | |
441 | data->count++; | |
442 | break; | |
443 | case DASD_ECKD_CCW_WRITE: | |
444 | case DASD_ECKD_CCW_WRITE_MT: | |
445 | case DASD_ECKD_CCW_WRITE_KD: | |
446 | case DASD_ECKD_CCW_WRITE_KD_MT: | |
447 | data->auxiliary.length_valid = 0x1; | |
448 | data->length = reclen; | |
449 | data->operation.operation = 0x01; | |
450 | break; | |
451 | case DASD_ECKD_CCW_WRITE_CKD: | |
452 | case DASD_ECKD_CCW_WRITE_CKD_MT: | |
453 | data->auxiliary.length_valid = 0x1; | |
454 | data->length = reclen; | |
455 | data->operation.operation = 0x03; | |
456 | break; | |
e4dbb0f2 SH |
457 | case DASD_ECKD_CCW_WRITE_FULL_TRACK: |
458 | data->operation.orientation = 0x0; | |
459 | data->operation.operation = 0x3F; | |
460 | data->extended_operation = 0x11; | |
461 | data->length = 0; | |
462 | data->extended_parameter_length = 0x02; | |
463 | if (data->count > 8) { | |
464 | data->extended_parameter[0] = 0xFF; | |
465 | data->extended_parameter[1] = 0xFF; | |
466 | data->extended_parameter[1] <<= (16 - count); | |
467 | } else { | |
468 | data->extended_parameter[0] = 0xFF; | |
469 | data->extended_parameter[0] <<= (8 - count); | |
470 | data->extended_parameter[1] = 0x00; | |
471 | } | |
472 | data->sector = 0xFF; | |
473 | break; | |
f3eb5384 SW |
474 | case DASD_ECKD_CCW_WRITE_TRACK_DATA: |
475 | data->auxiliary.length_valid = 0x1; | |
476 | data->length = reclen; /* not tlf, as one might think */ | |
477 | data->operation.operation = 0x3F; | |
478 | data->extended_operation = 0x23; | |
479 | break; | |
480 | case DASD_ECKD_CCW_READ: | |
481 | case DASD_ECKD_CCW_READ_MT: | |
482 | case DASD_ECKD_CCW_READ_KD: | |
483 | case DASD_ECKD_CCW_READ_KD_MT: | |
484 | data->auxiliary.length_valid = 0x1; | |
485 | data->length = reclen; | |
486 | data->operation.operation = 0x06; | |
487 | break; | |
488 | case DASD_ECKD_CCW_READ_CKD: | |
489 | case DASD_ECKD_CCW_READ_CKD_MT: | |
490 | data->auxiliary.length_valid = 0x1; | |
491 | data->length = reclen; | |
492 | data->operation.operation = 0x16; | |
493 | break; | |
494 | case DASD_ECKD_CCW_READ_COUNT: | |
495 | data->operation.operation = 0x06; | |
496 | break; | |
e4dbb0f2 SH |
497 | case DASD_ECKD_CCW_READ_TRACK: |
498 | data->operation.orientation = 0x1; | |
499 | data->operation.operation = 0x0C; | |
500 | data->extended_parameter_length = 0; | |
501 | data->sector = 0xFF; | |
502 | break; | |
f3eb5384 SW |
503 | case DASD_ECKD_CCW_READ_TRACK_DATA: |
504 | data->auxiliary.length_valid = 0x1; | |
505 | data->length = tlf; | |
506 | data->operation.operation = 0x0C; | |
507 | break; | |
508 | case DASD_ECKD_CCW_ERASE: | |
509 | data->length = reclen; | |
510 | data->auxiliary.length_valid = 0x1; | |
511 | data->operation.operation = 0x0b; | |
512 | break; | |
513 | default: | |
514 | DBF_DEV_EVENT(DBF_ERR, device, | |
515 | "fill LRE unknown opcode 0x%x", cmd); | |
516 | BUG(); | |
517 | } | |
518 | set_ch_t(&data->seek_addr, | |
519 | trk / private->rdc_data.trk_per_cyl, | |
520 | trk % private->rdc_data.trk_per_cyl); | |
521 | data->search_arg.cyl = data->seek_addr.cyl; | |
522 | data->search_arg.head = data->seek_addr.head; | |
523 | data->search_arg.record = rec_on_trk; | |
524 | } | |
525 | ||
526 | static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, | |
527 | unsigned int trk, unsigned int totrk, int cmd, | |
528 | struct dasd_device *basedev, struct dasd_device *startdev, | |
45f186be | 529 | unsigned int format, unsigned int rec_on_trk, int count, |
f3eb5384 | 530 | unsigned int blksize, unsigned int tlf) |
8e09f215 SW |
531 | { |
532 | struct dasd_eckd_private *basepriv, *startpriv; | |
f3eb5384 | 533 | struct LRE_eckd_data *lredata; |
45f186be | 534 | struct DE_eckd_data *dedata; |
8e09f215 SW |
535 | int rc = 0; |
536 | ||
543691a4 SO |
537 | basepriv = basedev->private; |
538 | startpriv = startdev->private; | |
f3eb5384 SW |
539 | dedata = &pfxdata->define_extent; |
540 | lredata = &pfxdata->locate_record; | |
8e09f215 SW |
541 | |
542 | ccw->cmd_code = DASD_ECKD_CCW_PFX; | |
543 | ccw->flags = 0; | |
e4dbb0f2 SH |
544 | if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) { |
545 | ccw->count = sizeof(*pfxdata) + 2; | |
546 | ccw->cda = (__u32) __pa(pfxdata); | |
547 | memset(pfxdata, 0, sizeof(*pfxdata) + 2); | |
548 | } else { | |
549 | ccw->count = sizeof(*pfxdata); | |
550 | ccw->cda = (__u32) __pa(pfxdata); | |
551 | memset(pfxdata, 0, sizeof(*pfxdata)); | |
552 | } | |
8e09f215 | 553 | |
8e09f215 | 554 | /* prefix data */ |
f3eb5384 SW |
555 | if (format > 1) { |
556 | DBF_DEV_EVENT(DBF_ERR, basedev, | |
557 | "PFX LRE unknown format 0x%x", format); | |
558 | BUG(); | |
559 | return -EINVAL; | |
560 | } | |
561 | pfxdata->format = format; | |
4abb08c2 SW |
562 | pfxdata->base_address = basepriv->ned->unit_addr; |
563 | pfxdata->base_lss = basepriv->ned->ID; | |
f3eb5384 | 564 | pfxdata->validity.define_extent = 1; |
8e09f215 SW |
565 | |
566 | /* private uid is kept up to date, conf_data may be outdated */ | |
da340f92 | 567 | if (startpriv->uid.type == UA_BASE_PAV_ALIAS) |
8e09f215 | 568 | pfxdata->validity.verify_base = 1; |
da340f92 SH |
569 | |
570 | if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) { | |
571 | pfxdata->validity.verify_base = 1; | |
572 | pfxdata->validity.hyper_pav = 1; | |
8e09f215 SW |
573 | } |
574 | ||
45f186be | 575 | rc = define_extent(NULL, dedata, trk, totrk, cmd, basedev, blksize); |
8e09f215 | 576 | |
45f186be JH |
577 | /* |
578 | * For some commands the System Time Stamp is set in the define extent | |
579 | * data when XRC is supported. The validity of the time stamp must be | |
580 | * reflected in the prefix data as well. | |
581 | */ | |
582 | if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02) | |
583 | pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ | |
f3eb5384 SW |
584 | |
585 | if (format == 1) { | |
45f186be JH |
586 | locate_record_ext(NULL, lredata, trk, rec_on_trk, count, cmd, |
587 | basedev, blksize, tlf); | |
f3eb5384 SW |
588 | } |
589 | ||
8e09f215 SW |
590 | return rc; |
591 | } | |
592 | ||
f3eb5384 SW |
593 | static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, |
594 | unsigned int trk, unsigned int totrk, int cmd, | |
595 | struct dasd_device *basedev, struct dasd_device *startdev) | |
596 | { | |
597 | return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev, | |
598 | 0, 0, 0, 0, 0); | |
599 | } | |
600 | ||
4d284cac | 601 | static void |
b44b0ab3 SW |
602 | locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, |
603 | unsigned int rec_on_trk, int no_rec, int cmd, | |
1da177e4 LT |
604 | struct dasd_device * device, int reclen) |
605 | { | |
543691a4 | 606 | struct dasd_eckd_private *private = device->private; |
1da177e4 LT |
607 | int sector; |
608 | int dn, d; | |
138c014d | 609 | |
1da177e4 LT |
610 | DBF_DEV_EVENT(DBF_INFO, device, |
611 | "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", | |
612 | trk, rec_on_trk, no_rec, cmd, reclen); | |
613 | ||
614 | ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; | |
615 | ccw->flags = 0; | |
616 | ccw->count = 16; | |
617 | ccw->cda = (__u32) __pa(data); | |
618 | ||
8e09f215 | 619 | memset(data, 0, sizeof(struct LO_eckd_data)); |
1da177e4 LT |
620 | sector = 0; |
621 | if (rec_on_trk) { | |
622 | switch (private->rdc_data.dev_type) { | |
623 | case 0x3390: | |
624 | dn = ceil_quot(reclen + 6, 232); | |
625 | d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); | |
626 | sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; | |
627 | break; | |
628 | case 0x3380: | |
629 | d = 7 + ceil_quot(reclen + 12, 32); | |
630 | sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; | |
631 | break; | |
632 | } | |
633 | } | |
634 | data->sector = sector; | |
635 | data->count = no_rec; | |
636 | switch (cmd) { | |
637 | case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: | |
638 | data->operation.orientation = 0x3; | |
639 | data->operation.operation = 0x03; | |
640 | break; | |
641 | case DASD_ECKD_CCW_READ_HOME_ADDRESS: | |
642 | data->operation.orientation = 0x3; | |
643 | data->operation.operation = 0x16; | |
644 | break; | |
645 | case DASD_ECKD_CCW_WRITE_RECORD_ZERO: | |
646 | data->operation.orientation = 0x1; | |
647 | data->operation.operation = 0x03; | |
648 | data->count++; | |
649 | break; | |
650 | case DASD_ECKD_CCW_READ_RECORD_ZERO: | |
651 | data->operation.orientation = 0x3; | |
652 | data->operation.operation = 0x16; | |
653 | data->count++; | |
654 | break; | |
655 | case DASD_ECKD_CCW_WRITE: | |
656 | case DASD_ECKD_CCW_WRITE_MT: | |
657 | case DASD_ECKD_CCW_WRITE_KD: | |
658 | case DASD_ECKD_CCW_WRITE_KD_MT: | |
659 | data->auxiliary.last_bytes_used = 0x1; | |
660 | data->length = reclen; | |
661 | data->operation.operation = 0x01; | |
662 | break; | |
663 | case DASD_ECKD_CCW_WRITE_CKD: | |
664 | case DASD_ECKD_CCW_WRITE_CKD_MT: | |
665 | data->auxiliary.last_bytes_used = 0x1; | |
666 | data->length = reclen; | |
667 | data->operation.operation = 0x03; | |
668 | break; | |
669 | case DASD_ECKD_CCW_READ: | |
670 | case DASD_ECKD_CCW_READ_MT: | |
671 | case DASD_ECKD_CCW_READ_KD: | |
672 | case DASD_ECKD_CCW_READ_KD_MT: | |
673 | data->auxiliary.last_bytes_used = 0x1; | |
674 | data->length = reclen; | |
675 | data->operation.operation = 0x06; | |
676 | break; | |
677 | case DASD_ECKD_CCW_READ_CKD: | |
678 | case DASD_ECKD_CCW_READ_CKD_MT: | |
679 | data->auxiliary.last_bytes_used = 0x1; | |
680 | data->length = reclen; | |
681 | data->operation.operation = 0x16; | |
682 | break; | |
683 | case DASD_ECKD_CCW_READ_COUNT: | |
684 | data->operation.operation = 0x06; | |
685 | break; | |
686 | case DASD_ECKD_CCW_ERASE: | |
687 | data->length = reclen; | |
688 | data->auxiliary.last_bytes_used = 0x1; | |
689 | data->operation.operation = 0x0b; | |
690 | break; | |
691 | default: | |
fc19f381 SH |
692 | DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record " |
693 | "opcode 0x%x", cmd); | |
1da177e4 | 694 | } |
b44b0ab3 SW |
695 | set_ch_t(&data->seek_addr, |
696 | trk / private->rdc_data.trk_per_cyl, | |
697 | trk % private->rdc_data.trk_per_cyl); | |
698 | data->search_arg.cyl = data->seek_addr.cyl; | |
699 | data->search_arg.head = data->seek_addr.head; | |
1da177e4 LT |
700 | data->search_arg.record = rec_on_trk; |
701 | } | |
702 | ||
703 | /* | |
704 | * Returns 1 if the block is one of the special blocks that needs | |
705 | * to get read/written with the KD variant of the command. | |
706 | * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and | |
707 | * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. | |
708 | * Luckily the KD variants differ only by one bit (0x08) from the | |
709 | * normal variant. So don't wonder about code like: | |
710 | * if (dasd_eckd_cdl_special(blk_per_trk, recid)) | |
711 | * ccw->cmd_code |= 0x8; | |
712 | */ | |
713 | static inline int | |
714 | dasd_eckd_cdl_special(int blk_per_trk, int recid) | |
715 | { | |
716 | if (recid < 3) | |
717 | return 1; | |
718 | if (recid < blk_per_trk) | |
719 | return 0; | |
720 | if (recid < 2 * blk_per_trk) | |
721 | return 1; | |
722 | return 0; | |
723 | } | |
724 | ||
725 | /* | |
726 | * Returns the record size for the special blocks of the cdl format. | |
727 | * Only returns something useful if dasd_eckd_cdl_special is true | |
728 | * for the recid. | |
729 | */ | |
730 | static inline int | |
731 | dasd_eckd_cdl_reclen(int recid) | |
732 | { | |
733 | if (recid < 3) | |
734 | return sizes_trk0[recid]; | |
735 | return LABEL_SIZE; | |
736 | } | |
b206181d SH |
737 | /* create unique id from private structure. */ |
738 | static void create_uid(struct dasd_eckd_private *private) | |
3d052595 | 739 | { |
4abb08c2 | 740 | int count; |
b206181d | 741 | struct dasd_uid *uid; |
3d052595 | 742 | |
2dedf0d9 | 743 | uid = &private->uid; |
3d052595 | 744 | memset(uid, 0, sizeof(struct dasd_uid)); |
4abb08c2 | 745 | memcpy(uid->vendor, private->ned->HDA_manufacturer, |
d0710c7c | 746 | sizeof(uid->vendor) - 1); |
3d052595 | 747 | EBCASC(uid->vendor, sizeof(uid->vendor) - 1); |
4abb08c2 | 748 | memcpy(uid->serial, private->ned->HDA_location, |
d0710c7c | 749 | sizeof(uid->serial) - 1); |
3d052595 | 750 | EBCASC(uid->serial, sizeof(uid->serial) - 1); |
4abb08c2 | 751 | uid->ssid = private->gneq->subsystemID; |
a419aef8 | 752 | uid->real_unit_addr = private->ned->unit_addr; |
4abb08c2 SW |
753 | if (private->sneq) { |
754 | uid->type = private->sneq->sua_flags; | |
8e09f215 | 755 | if (uid->type == UA_BASE_PAV_ALIAS) |
4abb08c2 | 756 | uid->base_unit_addr = private->sneq->base_unit_addr; |
8e09f215 SW |
757 | } else { |
758 | uid->type = UA_BASE_DEVICE; | |
759 | } | |
4abb08c2 SW |
760 | if (private->vdsneq) { |
761 | for (count = 0; count < 16; count++) { | |
762 | sprintf(uid->vduit+2*count, "%02x", | |
763 | private->vdsneq->uit[count]); | |
764 | } | |
765 | } | |
b206181d SH |
766 | } |
767 | ||
768 | /* | |
769 | * Generate device unique id that specifies the physical device. | |
770 | */ | |
771 | static int dasd_eckd_generate_uid(struct dasd_device *device) | |
772 | { | |
543691a4 | 773 | struct dasd_eckd_private *private = device->private; |
b206181d SH |
774 | unsigned long flags; |
775 | ||
b206181d SH |
776 | if (!private) |
777 | return -ENODEV; | |
778 | if (!private->ned || !private->gneq) | |
779 | return -ENODEV; | |
780 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); | |
781 | create_uid(private); | |
2dedf0d9 | 782 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
3d052595 HH |
783 | return 0; |
784 | } | |
785 | ||
2dedf0d9 SH |
786 | static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid) |
787 | { | |
543691a4 | 788 | struct dasd_eckd_private *private = device->private; |
2dedf0d9 SH |
789 | unsigned long flags; |
790 | ||
543691a4 | 791 | if (private) { |
2dedf0d9 SH |
792 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); |
793 | *uid = private->uid; | |
794 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); | |
795 | return 0; | |
796 | } | |
797 | return -EINVAL; | |
798 | } | |
799 | ||
b206181d SH |
800 | /* |
801 | * compare device UID with data of a given dasd_eckd_private structure | |
802 | * return 0 for match | |
803 | */ | |
804 | static int dasd_eckd_compare_path_uid(struct dasd_device *device, | |
805 | struct dasd_eckd_private *private) | |
806 | { | |
807 | struct dasd_uid device_uid; | |
808 | ||
809 | create_uid(private); | |
810 | dasd_eckd_get_uid(device, &device_uid); | |
811 | ||
812 | return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid)); | |
813 | } | |
814 | ||
a4d26c6a SW |
815 | static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device, |
816 | struct dasd_ccw_req *cqr, | |
817 | __u8 *rcd_buffer, | |
818 | __u8 lpm) | |
17283b56 | 819 | { |
17283b56 | 820 | struct ccw1 *ccw; |
a4d26c6a SW |
821 | /* |
822 | * buffer has to start with EBCDIC "V1.0" to show | |
823 | * support for virtual device SNEQ | |
824 | */ | |
825 | rcd_buffer[0] = 0xE5; | |
826 | rcd_buffer[1] = 0xF1; | |
827 | rcd_buffer[2] = 0x4B; | |
828 | rcd_buffer[3] = 0xF0; | |
17283b56 CH |
829 | |
830 | ccw = cqr->cpaddr; | |
a4d26c6a SW |
831 | ccw->cmd_code = DASD_ECKD_CCW_RCD; |
832 | ccw->flags = 0; | |
17283b56 | 833 | ccw->cda = (__u32)(addr_t)rcd_buffer; |
a4d26c6a SW |
834 | ccw->count = DASD_ECKD_RCD_DATA_SIZE; |
835 | cqr->magic = DASD_ECKD_MAGIC; | |
17283b56 | 836 | |
8e09f215 SW |
837 | cqr->startdev = device; |
838 | cqr->memdev = device; | |
839 | cqr->block = NULL; | |
17283b56 CH |
840 | cqr->expires = 10*HZ; |
841 | cqr->lpm = lpm; | |
eb6e199b | 842 | cqr->retries = 256; |
1aae0560 | 843 | cqr->buildclk = get_tod_clock(); |
17283b56 | 844 | cqr->status = DASD_CQR_FILLED; |
a4d26c6a SW |
845 | set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); |
846 | } | |
847 | ||
5915a873 SH |
848 | /* |
849 | * Wakeup helper for read_conf | |
850 | * if the cqr is not done and needs some error recovery | |
851 | * the buffer has to be re-initialized with the EBCDIC "V1.0" | |
852 | * to show support for virtual device SNEQ | |
853 | */ | |
854 | static void read_conf_cb(struct dasd_ccw_req *cqr, void *data) | |
855 | { | |
856 | struct ccw1 *ccw; | |
857 | __u8 *rcd_buffer; | |
858 | ||
859 | if (cqr->status != DASD_CQR_DONE) { | |
860 | ccw = cqr->cpaddr; | |
861 | rcd_buffer = (__u8 *)((addr_t) ccw->cda); | |
862 | memset(rcd_buffer, 0, sizeof(*rcd_buffer)); | |
863 | ||
864 | rcd_buffer[0] = 0xE5; | |
865 | rcd_buffer[1] = 0xF1; | |
866 | rcd_buffer[2] = 0x4B; | |
867 | rcd_buffer[3] = 0xF0; | |
868 | } | |
869 | dasd_wakeup_cb(cqr, data); | |
870 | } | |
871 | ||
a4d26c6a SW |
872 | static int dasd_eckd_read_conf_immediately(struct dasd_device *device, |
873 | struct dasd_ccw_req *cqr, | |
874 | __u8 *rcd_buffer, | |
875 | __u8 lpm) | |
876 | { | |
877 | struct ciw *ciw; | |
878 | int rc; | |
879 | /* | |
880 | * sanity check: scan for RCD command in extended SenseID data | |
881 | * some devices do not support RCD | |
882 | */ | |
883 | ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); | |
884 | if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) | |
885 | return -EOPNOTSUPP; | |
886 | ||
887 | dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm); | |
888 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); | |
5a27e60d | 889 | set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); |
a4d26c6a | 890 | cqr->retries = 5; |
5915a873 | 891 | cqr->callback = read_conf_cb; |
a4d26c6a SW |
892 | rc = dasd_sleep_on_immediatly(cqr); |
893 | return rc; | |
17283b56 CH |
894 | } |
895 | ||
896 | static int dasd_eckd_read_conf_lpm(struct dasd_device *device, | |
897 | void **rcd_buffer, | |
898 | int *rcd_buffer_size, __u8 lpm) | |
899 | { | |
900 | struct ciw *ciw; | |
901 | char *rcd_buf = NULL; | |
902 | int ret; | |
903 | struct dasd_ccw_req *cqr; | |
904 | ||
905 | /* | |
a4d26c6a SW |
906 | * sanity check: scan for RCD command in extended SenseID data |
907 | * some devices do not support RCD | |
17283b56 CH |
908 | */ |
909 | ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); | |
a4d26c6a | 910 | if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) { |
17283b56 CH |
911 | ret = -EOPNOTSUPP; |
912 | goto out_error; | |
913 | } | |
a4d26c6a | 914 | rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA); |
17283b56 CH |
915 | if (!rcd_buf) { |
916 | ret = -ENOMEM; | |
917 | goto out_error; | |
918 | } | |
a4d26c6a SW |
919 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, |
920 | 0, /* use rcd_buf as data ara */ | |
c5205f2f | 921 | device, NULL); |
17283b56 | 922 | if (IS_ERR(cqr)) { |
a4d26c6a SW |
923 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
924 | "Could not allocate RCD request"); | |
925 | ret = -ENOMEM; | |
17283b56 CH |
926 | goto out_error; |
927 | } | |
a4d26c6a | 928 | dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm); |
5915a873 | 929 | cqr->callback = read_conf_cb; |
17283b56 CH |
930 | ret = dasd_sleep_on(cqr); |
931 | /* | |
932 | * on success we update the user input parms | |
933 | */ | |
8e09f215 | 934 | dasd_sfree_request(cqr, cqr->memdev); |
17283b56 CH |
935 | if (ret) |
936 | goto out_error; | |
937 | ||
a4d26c6a | 938 | *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE; |
17283b56 CH |
939 | *rcd_buffer = rcd_buf; |
940 | return 0; | |
941 | out_error: | |
942 | kfree(rcd_buf); | |
943 | *rcd_buffer = NULL; | |
944 | *rcd_buffer_size = 0; | |
945 | return ret; | |
946 | } | |
947 | ||
4abb08c2 SW |
948 | static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) |
949 | { | |
950 | ||
951 | struct dasd_sneq *sneq; | |
952 | int i, count; | |
953 | ||
954 | private->ned = NULL; | |
955 | private->sneq = NULL; | |
956 | private->vdsneq = NULL; | |
957 | private->gneq = NULL; | |
958 | count = private->conf_len / sizeof(struct dasd_sneq); | |
959 | sneq = (struct dasd_sneq *)private->conf_data; | |
960 | for (i = 0; i < count; ++i) { | |
961 | if (sneq->flags.identifier == 1 && sneq->format == 1) | |
962 | private->sneq = sneq; | |
963 | else if (sneq->flags.identifier == 1 && sneq->format == 4) | |
964 | private->vdsneq = (struct vd_sneq *)sneq; | |
965 | else if (sneq->flags.identifier == 2) | |
966 | private->gneq = (struct dasd_gneq *)sneq; | |
967 | else if (sneq->flags.identifier == 3 && sneq->res1 == 1) | |
968 | private->ned = (struct dasd_ned *)sneq; | |
969 | sneq++; | |
970 | } | |
971 | if (!private->ned || !private->gneq) { | |
972 | private->ned = NULL; | |
973 | private->sneq = NULL; | |
974 | private->vdsneq = NULL; | |
975 | private->gneq = NULL; | |
976 | return -EINVAL; | |
977 | } | |
978 | return 0; | |
979 | ||
980 | }; | |
981 | ||
982 | static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) | |
983 | { | |
984 | struct dasd_gneq *gneq; | |
985 | int i, count, found; | |
986 | ||
987 | count = conf_len / sizeof(*gneq); | |
988 | gneq = (struct dasd_gneq *)conf_data; | |
989 | found = 0; | |
990 | for (i = 0; i < count; ++i) { | |
991 | if (gneq->flags.identifier == 2) { | |
992 | found = 1; | |
993 | break; | |
994 | } | |
995 | gneq++; | |
996 | } | |
997 | if (found) | |
998 | return ((char *)gneq)[18] & 0x07; | |
999 | else | |
1000 | return 0; | |
1001 | } | |
1002 | ||
c7c0c9de SH |
1003 | static void dasd_eckd_clear_conf_data(struct dasd_device *device) |
1004 | { | |
543691a4 | 1005 | struct dasd_eckd_private *private = device->private; |
c7c0c9de SH |
1006 | int i; |
1007 | ||
c7c0c9de SH |
1008 | private->conf_data = NULL; |
1009 | private->conf_len = 0; | |
1010 | for (i = 0; i < 8; i++) { | |
c9346151 SH |
1011 | kfree(device->path[i].conf_data); |
1012 | device->path[i].conf_data = NULL; | |
a521b048 SH |
1013 | device->path[i].cssid = 0; |
1014 | device->path[i].ssid = 0; | |
1015 | device->path[i].chpid = 0; | |
c7c0c9de SH |
1016 | } |
1017 | } | |
1018 | ||
1019 | ||
4abb08c2 | 1020 | static int dasd_eckd_read_conf(struct dasd_device *device) |
1da177e4 LT |
1021 | { |
1022 | void *conf_data; | |
1023 | int conf_len, conf_data_saved; | |
b179b037 | 1024 | int rc, path_err, pos; |
a4d26c6a | 1025 | __u8 lpm, opm; |
b206181d | 1026 | struct dasd_eckd_private *private, path_private; |
b206181d SH |
1027 | struct dasd_uid *uid; |
1028 | char print_path_uid[60], print_device_uid[60]; | |
ded27d8d | 1029 | struct channel_path_desc_fmt0 *chp_desc; |
a521b048 | 1030 | struct subchannel_id sch_id; |
1da177e4 | 1031 | |
543691a4 | 1032 | private = device->private; |
a4d26c6a | 1033 | opm = ccw_device_get_path_mask(device->cdev); |
a521b048 | 1034 | ccw_device_get_schid(device->cdev, &sch_id); |
1da177e4 | 1035 | conf_data_saved = 0; |
55d3a85c | 1036 | path_err = 0; |
1da177e4 LT |
1037 | /* get configuration data per operational path */ |
1038 | for (lpm = 0x80; lpm; lpm>>= 1) { | |
b206181d SH |
1039 | if (!(lpm & opm)) |
1040 | continue; | |
1041 | rc = dasd_eckd_read_conf_lpm(device, &conf_data, | |
1042 | &conf_len, lpm); | |
1043 | if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ | |
1044 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, | |
1045 | "Read configuration data returned " | |
1046 | "error %d", rc); | |
1047 | return rc; | |
1048 | } | |
1049 | if (conf_data == NULL) { | |
1050 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
1051 | "No configuration data " | |
1052 | "retrieved"); | |
1053 | /* no further analysis possible */ | |
c9346151 | 1054 | dasd_path_add_opm(device, opm); |
b206181d SH |
1055 | continue; /* no error */ |
1056 | } | |
1057 | /* save first valid configuration data */ | |
1058 | if (!conf_data_saved) { | |
c7c0c9de SH |
1059 | /* initially clear previously stored conf_data */ |
1060 | dasd_eckd_clear_conf_data(device); | |
b206181d SH |
1061 | private->conf_data = conf_data; |
1062 | private->conf_len = conf_len; | |
1063 | if (dasd_eckd_identify_conf_parts(private)) { | |
1064 | private->conf_data = NULL; | |
1065 | private->conf_len = 0; | |
1066 | kfree(conf_data); | |
1067 | continue; | |
1da177e4 | 1068 | } |
c7c0c9de SH |
1069 | pos = pathmask_to_pos(lpm); |
1070 | /* store per path conf_data */ | |
c9346151 | 1071 | device->path[pos].conf_data = conf_data; |
a521b048 SH |
1072 | device->path[pos].cssid = sch_id.cssid; |
1073 | device->path[pos].ssid = sch_id.ssid; | |
1074 | chp_desc = ccw_device_get_chp_desc(device->cdev, pos); | |
1075 | if (chp_desc) | |
1076 | device->path[pos].chpid = chp_desc->chpid; | |
1077 | kfree(chp_desc); | |
b206181d SH |
1078 | /* |
1079 | * build device UID that other path data | |
1080 | * can be compared to it | |
1081 | */ | |
1082 | dasd_eckd_generate_uid(device); | |
1083 | conf_data_saved++; | |
1084 | } else { | |
1085 | path_private.conf_data = conf_data; | |
1086 | path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; | |
1087 | if (dasd_eckd_identify_conf_parts( | |
1088 | &path_private)) { | |
1089 | path_private.conf_data = NULL; | |
1090 | path_private.conf_len = 0; | |
1091 | kfree(conf_data); | |
1092 | continue; | |
1da177e4 | 1093 | } |
b206181d SH |
1094 | if (dasd_eckd_compare_path_uid( |
1095 | device, &path_private)) { | |
1096 | uid = &path_private.uid; | |
1097 | if (strlen(uid->vduit) > 0) | |
1098 | snprintf(print_path_uid, | |
1099 | sizeof(print_path_uid), | |
1100 | "%s.%s.%04x.%02x.%s", | |
1101 | uid->vendor, uid->serial, | |
1102 | uid->ssid, uid->real_unit_addr, | |
1103 | uid->vduit); | |
1104 | else | |
1105 | snprintf(print_path_uid, | |
1106 | sizeof(print_path_uid), | |
1107 | "%s.%s.%04x.%02x", | |
1108 | uid->vendor, uid->serial, | |
1109 | uid->ssid, | |
1110 | uid->real_unit_addr); | |
1111 | uid = &private->uid; | |
1112 | if (strlen(uid->vduit) > 0) | |
1113 | snprintf(print_device_uid, | |
1114 | sizeof(print_device_uid), | |
1115 | "%s.%s.%04x.%02x.%s", | |
1116 | uid->vendor, uid->serial, | |
1117 | uid->ssid, uid->real_unit_addr, | |
1118 | uid->vduit); | |
1119 | else | |
1120 | snprintf(print_device_uid, | |
1121 | sizeof(print_device_uid), | |
1122 | "%s.%s.%04x.%02x", | |
1123 | uid->vendor, uid->serial, | |
1124 | uid->ssid, | |
1125 | uid->real_unit_addr); | |
1126 | dev_err(&device->cdev->dev, | |
1127 | "Not all channel paths lead to " | |
1128 | "the same device, path %02X leads to " | |
1129 | "device %s instead of %s\n", lpm, | |
1130 | print_path_uid, print_device_uid); | |
55d3a85c | 1131 | path_err = -EINVAL; |
c9346151 | 1132 | dasd_path_add_cablepm(device, lpm); |
55d3a85c | 1133 | continue; |
1da177e4 | 1134 | } |
c7c0c9de SH |
1135 | pos = pathmask_to_pos(lpm); |
1136 | /* store per path conf_data */ | |
c9346151 | 1137 | device->path[pos].conf_data = conf_data; |
a521b048 SH |
1138 | device->path[pos].cssid = sch_id.cssid; |
1139 | device->path[pos].ssid = sch_id.ssid; | |
1140 | chp_desc = ccw_device_get_chp_desc(device->cdev, pos); | |
1141 | if (chp_desc) | |
1142 | device->path[pos].chpid = chp_desc->chpid; | |
1143 | kfree(chp_desc); | |
b206181d SH |
1144 | path_private.conf_data = NULL; |
1145 | path_private.conf_len = 0; | |
1146 | } | |
1147 | switch (dasd_eckd_path_access(conf_data, conf_len)) { | |
1148 | case 0x02: | |
c9346151 | 1149 | dasd_path_add_nppm(device, lpm); |
b206181d SH |
1150 | break; |
1151 | case 0x03: | |
c9346151 | 1152 | dasd_path_add_ppm(device, lpm); |
b206181d | 1153 | break; |
1da177e4 | 1154 | } |
c9346151 SH |
1155 | if (!dasd_path_get_opm(device)) { |
1156 | dasd_path_set_opm(device, lpm); | |
ccc0e7dc SH |
1157 | dasd_generic_path_operational(device); |
1158 | } else { | |
c9346151 | 1159 | dasd_path_add_opm(device, lpm); |
ccc0e7dc | 1160 | } |
1da177e4 | 1161 | } |
b206181d | 1162 | |
55d3a85c | 1163 | return path_err; |
1da177e4 LT |
1164 | } |
1165 | ||
a521b048 SH |
1166 | static u32 get_fcx_max_data(struct dasd_device *device) |
1167 | { | |
1168 | struct dasd_eckd_private *private = device->private; | |
1169 | int fcx_in_css, fcx_in_gneq, fcx_in_features; | |
dd4b3c83 JH |
1170 | unsigned int mdc; |
1171 | int tpm; | |
a521b048 SH |
1172 | |
1173 | if (dasd_nofcx) | |
1174 | return 0; | |
1175 | /* is transport mode supported? */ | |
1176 | fcx_in_css = css_general_characteristics.fcx; | |
1177 | fcx_in_gneq = private->gneq->reserved2[7] & 0x04; | |
1178 | fcx_in_features = private->features.feature[40] & 0x80; | |
1179 | tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; | |
1180 | ||
1181 | if (!tpm) | |
1182 | return 0; | |
1183 | ||
1184 | mdc = ccw_device_get_mdc(device->cdev, 0); | |
dd4b3c83 | 1185 | if (mdc == 0) { |
a521b048 SH |
1186 | dev_warn(&device->cdev->dev, "Detecting the maximum supported data size for zHPF requests failed\n"); |
1187 | return 0; | |
1188 | } else { | |
1189 | return (u32)mdc * FCX_MAX_DATA_FACTOR; | |
1190 | } | |
1191 | } | |
1192 | ||
a4d26c6a SW |
1193 | static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) |
1194 | { | |
543691a4 | 1195 | struct dasd_eckd_private *private = device->private; |
dd4b3c83 | 1196 | unsigned int mdc; |
a4d26c6a SW |
1197 | u32 fcx_max_data; |
1198 | ||
a4d26c6a SW |
1199 | if (private->fcx_max_data) { |
1200 | mdc = ccw_device_get_mdc(device->cdev, lpm); | |
dd4b3c83 | 1201 | if (mdc == 0) { |
a4d26c6a SW |
1202 | dev_warn(&device->cdev->dev, |
1203 | "Detecting the maximum data size for zHPF " | |
1204 | "requests failed (rc=%d) for a new path %x\n", | |
1205 | mdc, lpm); | |
1206 | return mdc; | |
1207 | } | |
0f02c4e7 | 1208 | fcx_max_data = (u32)mdc * FCX_MAX_DATA_FACTOR; |
a4d26c6a SW |
1209 | if (fcx_max_data < private->fcx_max_data) { |
1210 | dev_warn(&device->cdev->dev, | |
1211 | "The maximum data size for zHPF requests %u " | |
1212 | "on a new path %x is below the active maximum " | |
1213 | "%u\n", fcx_max_data, lpm, | |
1214 | private->fcx_max_data); | |
1215 | return -EACCES; | |
1216 | } | |
1217 | } | |
1218 | return 0; | |
1219 | } | |
1220 | ||
b206181d SH |
1221 | static int rebuild_device_uid(struct dasd_device *device, |
1222 | struct path_verification_work_data *data) | |
1223 | { | |
543691a4 | 1224 | struct dasd_eckd_private *private = device->private; |
c9346151 | 1225 | __u8 lpm, opm = dasd_path_get_opm(device); |
543691a4 | 1226 | int rc = -ENODEV; |
b206181d SH |
1227 | |
1228 | for (lpm = 0x80; lpm; lpm >>= 1) { | |
1229 | if (!(lpm & opm)) | |
1230 | continue; | |
1231 | memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); | |
1232 | memset(&data->cqr, 0, sizeof(data->cqr)); | |
1233 | data->cqr.cpaddr = &data->ccw; | |
1234 | rc = dasd_eckd_read_conf_immediately(device, &data->cqr, | |
1235 | data->rcd_buffer, | |
1236 | lpm); | |
1237 | ||
1238 | if (rc) { | |
1239 | if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */ | |
1240 | continue; | |
1241 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, | |
1242 | "Read configuration data " | |
1243 | "returned error %d", rc); | |
1244 | break; | |
1245 | } | |
1246 | memcpy(private->conf_data, data->rcd_buffer, | |
1247 | DASD_ECKD_RCD_DATA_SIZE); | |
1248 | if (dasd_eckd_identify_conf_parts(private)) { | |
1249 | rc = -ENODEV; | |
1250 | } else /* first valid path is enough */ | |
1251 | break; | |
1252 | } | |
1253 | ||
1254 | if (!rc) | |
1255 | rc = dasd_eckd_generate_uid(device); | |
1256 | ||
1257 | return rc; | |
1258 | } | |
1259 | ||
a4d26c6a SW |
1260 | static void do_path_verification_work(struct work_struct *work) |
1261 | { | |
1262 | struct path_verification_work_data *data; | |
1263 | struct dasd_device *device; | |
b206181d SH |
1264 | struct dasd_eckd_private path_private; |
1265 | struct dasd_uid *uid; | |
1266 | __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; | |
5db8440c | 1267 | __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm; |
a4d26c6a | 1268 | unsigned long flags; |
b206181d | 1269 | char print_uid[60]; |
a4d26c6a SW |
1270 | int rc; |
1271 | ||
1272 | data = container_of(work, struct path_verification_work_data, worker); | |
1273 | device = data->device; | |
1274 | ||
c8d1c0ff SH |
1275 | /* delay path verification until device was resumed */ |
1276 | if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { | |
1277 | schedule_work(work); | |
1278 | return; | |
1279 | } | |
1eb38023 SH |
1280 | /* check if path verification already running and delay if so */ |
1281 | if (test_and_set_bit(DASD_FLAG_PATH_VERIFY, &device->flags)) { | |
1282 | schedule_work(work); | |
1283 | return; | |
1284 | } | |
a4d26c6a SW |
1285 | opm = 0; |
1286 | npm = 0; | |
1287 | ppm = 0; | |
1288 | epm = 0; | |
5db8440c SH |
1289 | hpfpm = 0; |
1290 | cablepm = 0; | |
1291 | ||
a4d26c6a | 1292 | for (lpm = 0x80; lpm; lpm >>= 1) { |
b206181d SH |
1293 | if (!(lpm & data->tbvpm)) |
1294 | continue; | |
1295 | memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); | |
1296 | memset(&data->cqr, 0, sizeof(data->cqr)); | |
1297 | data->cqr.cpaddr = &data->ccw; | |
1298 | rc = dasd_eckd_read_conf_immediately(device, &data->cqr, | |
1299 | data->rcd_buffer, | |
1300 | lpm); | |
1301 | if (!rc) { | |
1302 | switch (dasd_eckd_path_access(data->rcd_buffer, | |
1303 | DASD_ECKD_RCD_DATA_SIZE) | |
1304 | ) { | |
1305 | case 0x02: | |
1306 | npm |= lpm; | |
1307 | break; | |
1308 | case 0x03: | |
1309 | ppm |= lpm; | |
1310 | break; | |
1311 | } | |
1312 | opm |= lpm; | |
1313 | } else if (rc == -EOPNOTSUPP) { | |
1314 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
1315 | "path verification: No configuration " | |
1316 | "data retrieved"); | |
1317 | opm |= lpm; | |
1318 | } else if (rc == -EAGAIN) { | |
1319 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
a4d26c6a SW |
1320 | "path verification: device is stopped," |
1321 | " try again later"); | |
b206181d SH |
1322 | epm |= lpm; |
1323 | } else { | |
1324 | dev_warn(&device->cdev->dev, | |
1325 | "Reading device feature codes failed " | |
1326 | "(rc=%d) for new path %x\n", rc, lpm); | |
1327 | continue; | |
1328 | } | |
1329 | if (verify_fcx_max_data(device, lpm)) { | |
1330 | opm &= ~lpm; | |
1331 | npm &= ~lpm; | |
1332 | ppm &= ~lpm; | |
5db8440c | 1333 | hpfpm |= lpm; |
b206181d SH |
1334 | continue; |
1335 | } | |
1336 | ||
1337 | /* | |
1338 | * save conf_data for comparison after | |
1339 | * rebuild_device_uid may have changed | |
1340 | * the original data | |
1341 | */ | |
1342 | memcpy(&path_rcd_buf, data->rcd_buffer, | |
1343 | DASD_ECKD_RCD_DATA_SIZE); | |
1344 | path_private.conf_data = (void *) &path_rcd_buf; | |
1345 | path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; | |
1346 | if (dasd_eckd_identify_conf_parts(&path_private)) { | |
1347 | path_private.conf_data = NULL; | |
1348 | path_private.conf_len = 0; | |
1349 | continue; | |
1350 | } | |
1351 | ||
1352 | /* | |
1353 | * compare path UID with device UID only if at least | |
1354 | * one valid path is left | |
1355 | * in other case the device UID may have changed and | |
1356 | * the first working path UID will be used as device UID | |
1357 | */ | |
c9346151 | 1358 | if (dasd_path_get_opm(device) && |
b206181d SH |
1359 | dasd_eckd_compare_path_uid(device, &path_private)) { |
1360 | /* | |
1361 | * the comparison was not successful | |
1362 | * rebuild the device UID with at least one | |
1363 | * known path in case a z/VM hyperswap command | |
1364 | * has changed the device | |
1365 | * | |
1366 | * after this compare again | |
1367 | * | |
1368 | * if either the rebuild or the recompare fails | |
1369 | * the path can not be used | |
1370 | */ | |
1371 | if (rebuild_device_uid(device, data) || | |
1372 | dasd_eckd_compare_path_uid( | |
1373 | device, &path_private)) { | |
1374 | uid = &path_private.uid; | |
1375 | if (strlen(uid->vduit) > 0) | |
1376 | snprintf(print_uid, sizeof(print_uid), | |
1377 | "%s.%s.%04x.%02x.%s", | |
1378 | uid->vendor, uid->serial, | |
1379 | uid->ssid, uid->real_unit_addr, | |
1380 | uid->vduit); | |
1381 | else | |
1382 | snprintf(print_uid, sizeof(print_uid), | |
1383 | "%s.%s.%04x.%02x", | |
1384 | uid->vendor, uid->serial, | |
1385 | uid->ssid, | |
1386 | uid->real_unit_addr); | |
1387 | dev_err(&device->cdev->dev, | |
1388 | "The newly added channel path %02X " | |
1389 | "will not be used because it leads " | |
1390 | "to a different device %s\n", | |
1391 | lpm, print_uid); | |
a4d26c6a SW |
1392 | opm &= ~lpm; |
1393 | npm &= ~lpm; | |
1394 | ppm &= ~lpm; | |
5db8440c | 1395 | cablepm |= lpm; |
b206181d | 1396 | continue; |
a4d26c6a SW |
1397 | } |
1398 | } | |
b206181d SH |
1399 | |
1400 | /* | |
1401 | * There is a small chance that a path is lost again between | |
1402 | * above path verification and the following modification of | |
1403 | * the device opm mask. We could avoid that race here by using | |
1404 | * yet another path mask, but we rather deal with this unlikely | |
1405 | * situation in dasd_start_IO. | |
1406 | */ | |
1407 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); | |
c9346151 SH |
1408 | if (!dasd_path_get_opm(device) && opm) { |
1409 | dasd_path_set_opm(device, opm); | |
b206181d | 1410 | dasd_generic_path_operational(device); |
5db8440c | 1411 | } else { |
c9346151 | 1412 | dasd_path_add_opm(device, opm); |
5db8440c | 1413 | } |
c9346151 SH |
1414 | dasd_path_add_nppm(device, npm); |
1415 | dasd_path_add_ppm(device, ppm); | |
1416 | dasd_path_add_tbvpm(device, epm); | |
1417 | dasd_path_add_cablepm(device, cablepm); | |
1418 | dasd_path_add_nohpfpm(device, hpfpm); | |
b206181d | 1419 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
a4d26c6a | 1420 | } |
1eb38023 | 1421 | clear_bit(DASD_FLAG_PATH_VERIFY, &device->flags); |
a4d26c6a SW |
1422 | dasd_put_device(device); |
1423 | if (data->isglobal) | |
1424 | mutex_unlock(&dasd_path_verification_mutex); | |
1425 | else | |
1426 | kfree(data); | |
1427 | } | |
1428 | ||
1429 | static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm) | |
1430 | { | |
1431 | struct path_verification_work_data *data; | |
1432 | ||
1433 | data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); | |
1434 | if (!data) { | |
1435 | if (mutex_trylock(&dasd_path_verification_mutex)) { | |
1436 | data = path_verification_worker; | |
1437 | data->isglobal = 1; | |
1438 | } else | |
1439 | return -ENOMEM; | |
1440 | } else { | |
1441 | memset(data, 0, sizeof(*data)); | |
1442 | data->isglobal = 0; | |
1443 | } | |
1444 | INIT_WORK(&data->worker, do_path_verification_work); | |
1445 | dasd_get_device(device); | |
1446 | data->device = device; | |
1447 | data->tbvpm = lpm; | |
1448 | schedule_work(&data->worker); | |
1449 | return 0; | |
1450 | } | |
1451 | ||
a521b048 SH |
1452 | static void dasd_eckd_reset_path(struct dasd_device *device, __u8 pm) |
1453 | { | |
1454 | struct dasd_eckd_private *private = device->private; | |
1455 | unsigned long flags; | |
1456 | ||
1457 | if (!private->fcx_max_data) | |
1458 | private->fcx_max_data = get_fcx_max_data(device); | |
1459 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); | |
1460 | dasd_path_set_tbvpm(device, pm ? : dasd_path_get_notoperpm(device)); | |
1461 | dasd_schedule_device_bh(device); | |
1462 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); | |
1463 | } | |
1464 | ||
8e09f215 SW |
1465 | static int dasd_eckd_read_features(struct dasd_device *device) |
1466 | { | |
543691a4 | 1467 | struct dasd_eckd_private *private = device->private; |
8e09f215 SW |
1468 | struct dasd_psf_prssd_data *prssdp; |
1469 | struct dasd_rssd_features *features; | |
1470 | struct dasd_ccw_req *cqr; | |
1471 | struct ccw1 *ccw; | |
1472 | int rc; | |
8e09f215 | 1473 | |
68d1e5f0 | 1474 | memset(&private->features, 0, sizeof(struct dasd_rssd_features)); |
68b781fe | 1475 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, |
8e09f215 SW |
1476 | (sizeof(struct dasd_psf_prssd_data) + |
1477 | sizeof(struct dasd_rssd_features)), | |
c5205f2f | 1478 | device, NULL); |
8e09f215 | 1479 | if (IS_ERR(cqr)) { |
b8ed5dd5 SH |
1480 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " |
1481 | "allocate initialization request"); | |
8e09f215 SW |
1482 | return PTR_ERR(cqr); |
1483 | } | |
1484 | cqr->startdev = device; | |
1485 | cqr->memdev = device; | |
1486 | cqr->block = NULL; | |
eb6e199b | 1487 | cqr->retries = 256; |
8e09f215 SW |
1488 | cqr->expires = 10 * HZ; |
1489 | ||
1490 | /* Prepare for Read Subsystem Data */ | |
1491 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
1492 | memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); | |
1493 | prssdp->order = PSF_ORDER_PRSSD; | |
1494 | prssdp->suborder = 0x41; /* Read Feature Codes */ | |
1495 | /* all other bytes of prssdp must be zero */ | |
1496 | ||
1497 | ccw = cqr->cpaddr; | |
1498 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
1499 | ccw->count = sizeof(struct dasd_psf_prssd_data); | |
1500 | ccw->flags |= CCW_FLAG_CC; | |
1501 | ccw->cda = (__u32)(addr_t) prssdp; | |
1502 | ||
1503 | /* Read Subsystem Data - feature codes */ | |
1504 | features = (struct dasd_rssd_features *) (prssdp + 1); | |
1505 | memset(features, 0, sizeof(struct dasd_rssd_features)); | |
1506 | ||
1507 | ccw++; | |
1508 | ccw->cmd_code = DASD_ECKD_CCW_RSSD; | |
1509 | ccw->count = sizeof(struct dasd_rssd_features); | |
1510 | ccw->cda = (__u32)(addr_t) features; | |
1511 | ||
1aae0560 | 1512 | cqr->buildclk = get_tod_clock(); |
8e09f215 SW |
1513 | cqr->status = DASD_CQR_FILLED; |
1514 | rc = dasd_sleep_on(cqr); | |
1515 | if (rc == 0) { | |
1516 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
1517 | features = (struct dasd_rssd_features *) (prssdp + 1); | |
1518 | memcpy(&private->features, features, | |
1519 | sizeof(struct dasd_rssd_features)); | |
68d1e5f0 SW |
1520 | } else |
1521 | dev_warn(&device->cdev->dev, "Reading device feature codes" | |
1522 | " failed with rc=%d\n", rc); | |
8e09f215 SW |
1523 | dasd_sfree_request(cqr, cqr->memdev); |
1524 | return rc; | |
1525 | } | |
1526 | ||
c729696b JH |
1527 | /* Read Volume Information - Volume Storage Query */ |
1528 | static int dasd_eckd_read_vol_info(struct dasd_device *device) | |
1529 | { | |
1530 | struct dasd_eckd_private *private = device->private; | |
1531 | struct dasd_psf_prssd_data *prssdp; | |
1532 | struct dasd_rssd_vsq *vsq; | |
1533 | struct dasd_ccw_req *cqr; | |
1534 | struct ccw1 *ccw; | |
9e12e54c | 1535 | int useglobal; |
c729696b JH |
1536 | int rc; |
1537 | ||
1538 | /* This command cannot be executed on an alias device */ | |
1539 | if (private->uid.type == UA_BASE_PAV_ALIAS || | |
1540 | private->uid.type == UA_HYPER_PAV_ALIAS) | |
1541 | return 0; | |
1542 | ||
9e12e54c | 1543 | useglobal = 0; |
c729696b JH |
1544 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 /* PSF + RSSD */, |
1545 | sizeof(*prssdp) + sizeof(*vsq), device, NULL); | |
1546 | if (IS_ERR(cqr)) { | |
1547 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
1548 | "Could not allocate initialization request"); | |
9e12e54c JH |
1549 | mutex_lock(&dasd_vol_info_mutex); |
1550 | useglobal = 1; | |
1551 | cqr = &dasd_vol_info_req->cqr; | |
1552 | memset(cqr, 0, sizeof(*cqr)); | |
1553 | memset(dasd_vol_info_req, 0, sizeof(*dasd_vol_info_req)); | |
1554 | cqr->cpaddr = &dasd_vol_info_req->ccw; | |
1555 | cqr->data = &dasd_vol_info_req->data; | |
1556 | cqr->magic = DASD_ECKD_MAGIC; | |
c729696b JH |
1557 | } |
1558 | ||
1559 | /* Prepare for Read Subsystem Data */ | |
1560 | prssdp = cqr->data; | |
1561 | prssdp->order = PSF_ORDER_PRSSD; | |
1562 | prssdp->suborder = PSF_SUBORDER_VSQ; /* Volume Storage Query */ | |
1563 | prssdp->lss = private->ned->ID; | |
1564 | prssdp->volume = private->ned->unit_addr; | |
1565 | ||
1566 | ccw = cqr->cpaddr; | |
1567 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
1568 | ccw->count = sizeof(*prssdp); | |
1569 | ccw->flags |= CCW_FLAG_CC; | |
1570 | ccw->cda = (__u32)(addr_t)prssdp; | |
1571 | ||
1572 | /* Read Subsystem Data - Volume Storage Query */ | |
1573 | vsq = (struct dasd_rssd_vsq *)(prssdp + 1); | |
1574 | memset(vsq, 0, sizeof(*vsq)); | |
1575 | ||
1576 | ccw++; | |
1577 | ccw->cmd_code = DASD_ECKD_CCW_RSSD; | |
1578 | ccw->count = sizeof(*vsq); | |
1579 | ccw->flags |= CCW_FLAG_SLI; | |
1580 | ccw->cda = (__u32)(addr_t)vsq; | |
1581 | ||
1582 | cqr->buildclk = get_tod_clock(); | |
1583 | cqr->status = DASD_CQR_FILLED; | |
1584 | cqr->startdev = device; | |
1585 | cqr->memdev = device; | |
1586 | cqr->block = NULL; | |
1587 | cqr->retries = 256; | |
1588 | cqr->expires = device->default_expires * HZ; | |
1589 | /* The command might not be supported. Suppress the error output */ | |
1590 | __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); | |
1591 | ||
1592 | rc = dasd_sleep_on_interruptible(cqr); | |
1593 | if (rc == 0) { | |
1594 | memcpy(&private->vsq, vsq, sizeof(*vsq)); | |
1595 | } else { | |
dd454839 JH |
1596 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, |
1597 | "Reading the volume storage information failed with rc=%d", rc); | |
c729696b JH |
1598 | } |
1599 | ||
9e12e54c JH |
1600 | if (useglobal) |
1601 | mutex_unlock(&dasd_vol_info_mutex); | |
1602 | else | |
1603 | dasd_sfree_request(cqr, cqr->memdev); | |
c729696b JH |
1604 | |
1605 | return rc; | |
1606 | } | |
1607 | ||
1608 | static int dasd_eckd_is_ese(struct dasd_device *device) | |
1609 | { | |
1610 | struct dasd_eckd_private *private = device->private; | |
1611 | ||
1612 | return private->vsq.vol_info.ese; | |
1613 | } | |
1614 | ||
1615 | static int dasd_eckd_ext_pool_id(struct dasd_device *device) | |
1616 | { | |
1617 | struct dasd_eckd_private *private = device->private; | |
1618 | ||
1619 | return private->vsq.extent_pool_id; | |
1620 | } | |
1621 | ||
1622 | /* | |
1623 | * This value represents the total amount of available space. As more space is | |
1624 | * allocated by ESE volumes, this value will decrease. | |
1625 | * The data for this value is therefore updated on any call. | |
1626 | */ | |
1627 | static int dasd_eckd_space_configured(struct dasd_device *device) | |
1628 | { | |
1629 | struct dasd_eckd_private *private = device->private; | |
1630 | int rc; | |
1631 | ||
1632 | rc = dasd_eckd_read_vol_info(device); | |
1633 | ||
1634 | return rc ? : private->vsq.space_configured; | |
1635 | } | |
1636 | ||
1637 | /* | |
1638 | * The value of space allocated by an ESE volume may have changed and is | |
1639 | * therefore updated on any call. | |
1640 | */ | |
1641 | static int dasd_eckd_space_allocated(struct dasd_device *device) | |
1642 | { | |
1643 | struct dasd_eckd_private *private = device->private; | |
1644 | int rc; | |
1645 | ||
1646 | rc = dasd_eckd_read_vol_info(device); | |
1647 | ||
1648 | return rc ? : private->vsq.space_allocated; | |
1649 | } | |
1650 | ||
1651 | static int dasd_eckd_logical_capacity(struct dasd_device *device) | |
1652 | { | |
1653 | struct dasd_eckd_private *private = device->private; | |
1654 | ||
1655 | return private->vsq.logical_capacity; | |
1656 | } | |
1657 | ||
9e12e54c JH |
1658 | static void dasd_eckd_ext_pool_exhaust_work(struct work_struct *work) |
1659 | { | |
1660 | struct ext_pool_exhaust_work_data *data; | |
1661 | struct dasd_device *device; | |
1662 | struct dasd_device *base; | |
1663 | ||
1664 | data = container_of(work, struct ext_pool_exhaust_work_data, worker); | |
1665 | device = data->device; | |
1666 | base = data->base; | |
1667 | ||
1668 | if (!base) | |
1669 | base = device; | |
1670 | if (dasd_eckd_space_configured(base) != 0) { | |
1671 | dasd_generic_space_avail(device); | |
1672 | } else { | |
1673 | dev_warn(&device->cdev->dev, "No space left in the extent pool\n"); | |
1674 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", "out of space"); | |
1675 | } | |
1676 | ||
1677 | dasd_put_device(device); | |
1678 | kfree(data); | |
1679 | } | |
1680 | ||
1681 | static int dasd_eckd_ext_pool_exhaust(struct dasd_device *device, | |
1682 | struct dasd_ccw_req *cqr) | |
1683 | { | |
1684 | struct ext_pool_exhaust_work_data *data; | |
1685 | ||
1686 | data = kzalloc(sizeof(*data), GFP_ATOMIC); | |
1687 | if (!data) | |
1688 | return -ENOMEM; | |
1689 | INIT_WORK(&data->worker, dasd_eckd_ext_pool_exhaust_work); | |
1690 | dasd_get_device(device); | |
1691 | data->device = device; | |
1692 | ||
1693 | if (cqr->block) | |
1694 | data->base = cqr->block->base; | |
1695 | else if (cqr->basedev) | |
1696 | data->base = cqr->basedev; | |
1697 | else | |
1698 | data->base = NULL; | |
1699 | ||
1700 | schedule_work(&data->worker); | |
1701 | ||
1702 | return 0; | |
1703 | } | |
1704 | ||
c729696b JH |
1705 | static void dasd_eckd_cpy_ext_pool_data(struct dasd_device *device, |
1706 | struct dasd_rssd_lcq *lcq) | |
1707 | { | |
1708 | struct dasd_eckd_private *private = device->private; | |
1709 | int pool_id = dasd_eckd_ext_pool_id(device); | |
1710 | struct dasd_ext_pool_sum eps; | |
1711 | int i; | |
1712 | ||
1713 | for (i = 0; i < lcq->pool_count; i++) { | |
1714 | eps = lcq->ext_pool_sum[i]; | |
1715 | if (eps.pool_id == pool_id) { | |
1716 | memcpy(&private->eps, &eps, | |
1717 | sizeof(struct dasd_ext_pool_sum)); | |
1718 | } | |
1719 | } | |
1720 | } | |
1721 | ||
1722 | /* Read Extent Pool Information - Logical Configuration Query */ | |
1723 | static int dasd_eckd_read_ext_pool_info(struct dasd_device *device) | |
1724 | { | |
1725 | struct dasd_eckd_private *private = device->private; | |
1726 | struct dasd_psf_prssd_data *prssdp; | |
1727 | struct dasd_rssd_lcq *lcq; | |
1728 | struct dasd_ccw_req *cqr; | |
1729 | struct ccw1 *ccw; | |
1730 | int rc; | |
1731 | ||
1732 | /* This command cannot be executed on an alias device */ | |
1733 | if (private->uid.type == UA_BASE_PAV_ALIAS || | |
1734 | private->uid.type == UA_HYPER_PAV_ALIAS) | |
1735 | return 0; | |
1736 | ||
1737 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 /* PSF + RSSD */, | |
1738 | sizeof(*prssdp) + sizeof(*lcq), device, NULL); | |
1739 | if (IS_ERR(cqr)) { | |
1740 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
1741 | "Could not allocate initialization request"); | |
1742 | return PTR_ERR(cqr); | |
1743 | } | |
1744 | ||
1745 | /* Prepare for Read Subsystem Data */ | |
1746 | prssdp = cqr->data; | |
1747 | memset(prssdp, 0, sizeof(*prssdp)); | |
1748 | prssdp->order = PSF_ORDER_PRSSD; | |
1749 | prssdp->suborder = PSF_SUBORDER_LCQ; /* Logical Configuration Query */ | |
1750 | ||
1751 | ccw = cqr->cpaddr; | |
1752 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
1753 | ccw->count = sizeof(*prssdp); | |
1754 | ccw->flags |= CCW_FLAG_CC; | |
1755 | ccw->cda = (__u32)(addr_t)prssdp; | |
1756 | ||
1757 | lcq = (struct dasd_rssd_lcq *)(prssdp + 1); | |
1758 | memset(lcq, 0, sizeof(*lcq)); | |
1759 | ||
1760 | ccw++; | |
1761 | ccw->cmd_code = DASD_ECKD_CCW_RSSD; | |
1762 | ccw->count = sizeof(*lcq); | |
1763 | ccw->flags |= CCW_FLAG_SLI; | |
1764 | ccw->cda = (__u32)(addr_t)lcq; | |
1765 | ||
1766 | cqr->buildclk = get_tod_clock(); | |
1767 | cqr->status = DASD_CQR_FILLED; | |
1768 | cqr->startdev = device; | |
1769 | cqr->memdev = device; | |
1770 | cqr->block = NULL; | |
1771 | cqr->retries = 256; | |
1772 | cqr->expires = device->default_expires * HZ; | |
1773 | /* The command might not be supported. Suppress the error output */ | |
1774 | __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); | |
1775 | ||
1776 | rc = dasd_sleep_on_interruptible(cqr); | |
1777 | if (rc == 0) { | |
1778 | dasd_eckd_cpy_ext_pool_data(device, lcq); | |
1779 | } else { | |
dd454839 JH |
1780 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, |
1781 | "Reading the logical configuration failed with rc=%d", rc); | |
c729696b JH |
1782 | } |
1783 | ||
1784 | dasd_sfree_request(cqr, cqr->memdev); | |
1785 | ||
1786 | return rc; | |
1787 | } | |
1788 | ||
1789 | /* | |
1790 | * Depending on the device type, the extent size is specified either as | |
1791 | * cylinders per extent (CKD) or size per extent (FBA) | |
1792 | * A 1GB size corresponds to 1113cyl, and 16MB to 21cyl. | |
1793 | */ | |
1794 | static int dasd_eckd_ext_size(struct dasd_device *device) | |
1795 | { | |
1796 | struct dasd_eckd_private *private = device->private; | |
1797 | struct dasd_ext_pool_sum eps = private->eps; | |
1798 | ||
1799 | if (!eps.flags.extent_size_valid) | |
1800 | return 0; | |
1801 | if (eps.extent_size.size_1G) | |
1802 | return 1113; | |
1803 | if (eps.extent_size.size_16M) | |
1804 | return 21; | |
1805 | ||
1806 | return 0; | |
1807 | } | |
1808 | ||
1809 | static int dasd_eckd_ext_pool_warn_thrshld(struct dasd_device *device) | |
1810 | { | |
1811 | struct dasd_eckd_private *private = device->private; | |
1812 | ||
1813 | return private->eps.warn_thrshld; | |
1814 | } | |
1815 | ||
1816 | static int dasd_eckd_ext_pool_cap_at_warnlevel(struct dasd_device *device) | |
1817 | { | |
1818 | struct dasd_eckd_private *private = device->private; | |
1819 | ||
1820 | return private->eps.flags.capacity_at_warnlevel; | |
1821 | } | |
1822 | ||
1823 | /* | |
1824 | * Extent Pool out of space | |
1825 | */ | |
1826 | static int dasd_eckd_ext_pool_oos(struct dasd_device *device) | |
1827 | { | |
1828 | struct dasd_eckd_private *private = device->private; | |
1829 | ||
1830 | return private->eps.flags.pool_oos; | |
1831 | } | |
8e09f215 | 1832 | |
40545573 HH |
1833 | /* |
1834 | * Build CP for Perform Subsystem Function - SSC. | |
1835 | */ | |
f3eb5384 SW |
1836 | static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, |
1837 | int enable_pav) | |
40545573 | 1838 | { |
8e09f215 SW |
1839 | struct dasd_ccw_req *cqr; |
1840 | struct dasd_psf_ssc_data *psf_ssc_data; | |
1841 | struct ccw1 *ccw; | |
40545573 | 1842 | |
68b781fe | 1843 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , |
40545573 | 1844 | sizeof(struct dasd_psf_ssc_data), |
c5205f2f | 1845 | device, NULL); |
40545573 | 1846 | |
8e09f215 | 1847 | if (IS_ERR(cqr)) { |
fc19f381 | 1848 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
40545573 | 1849 | "Could not allocate PSF-SSC request"); |
8e09f215 SW |
1850 | return cqr; |
1851 | } | |
1852 | psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; | |
1853 | psf_ssc_data->order = PSF_ORDER_SSC; | |
626350b6 | 1854 | psf_ssc_data->suborder = 0xc0; |
f3eb5384 | 1855 | if (enable_pav) { |
626350b6 | 1856 | psf_ssc_data->suborder |= 0x08; |
f3eb5384 SW |
1857 | psf_ssc_data->reserved[0] = 0x88; |
1858 | } | |
8e09f215 SW |
1859 | ccw = cqr->cpaddr; |
1860 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
1861 | ccw->cda = (__u32)(addr_t)psf_ssc_data; | |
1862 | ccw->count = 66; | |
1863 | ||
1864 | cqr->startdev = device; | |
1865 | cqr->memdev = device; | |
1866 | cqr->block = NULL; | |
eb6e199b | 1867 | cqr->retries = 256; |
8e09f215 | 1868 | cqr->expires = 10*HZ; |
1aae0560 | 1869 | cqr->buildclk = get_tod_clock(); |
8e09f215 SW |
1870 | cqr->status = DASD_CQR_FILLED; |
1871 | return cqr; | |
40545573 HH |
1872 | } |
1873 | ||
1874 | /* | |
1875 | * Perform Subsystem Function. | |
1876 | * It is necessary to trigger CIO for channel revalidation since this | |
1877 | * call might change behaviour of DASD devices. | |
1878 | */ | |
1879 | static int | |
12d7b107 SH |
1880 | dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav, |
1881 | unsigned long flags) | |
40545573 | 1882 | { |
8e09f215 SW |
1883 | struct dasd_ccw_req *cqr; |
1884 | int rc; | |
1885 | ||
f3eb5384 | 1886 | cqr = dasd_eckd_build_psf_ssc(device, enable_pav); |
8e09f215 SW |
1887 | if (IS_ERR(cqr)) |
1888 | return PTR_ERR(cqr); | |
1889 | ||
12d7b107 SH |
1890 | /* |
1891 | * set flags e.g. turn on failfast, to prevent blocking | |
1892 | * the calling function should handle failed requests | |
1893 | */ | |
1894 | cqr->flags |= flags; | |
1895 | ||
8e09f215 SW |
1896 | rc = dasd_sleep_on(cqr); |
1897 | if (!rc) | |
1898 | /* trigger CIO to reprobe devices */ | |
1899 | css_schedule_reprobe(); | |
12d7b107 SH |
1900 | else if (cqr->intrc == -EAGAIN) |
1901 | rc = -EAGAIN; | |
1902 | ||
8e09f215 SW |
1903 | dasd_sfree_request(cqr, cqr->memdev); |
1904 | return rc; | |
40545573 HH |
1905 | } |
1906 | ||
1907 | /* | |
1908 | * Valide storage server of current device. | |
1909 | */ | |
12d7b107 SH |
1910 | static int dasd_eckd_validate_server(struct dasd_device *device, |
1911 | unsigned long flags) | |
40545573 | 1912 | { |
543691a4 SO |
1913 | struct dasd_eckd_private *private = device->private; |
1914 | int enable_pav, rc; | |
40545573 | 1915 | |
f9f8d02f SH |
1916 | if (private->uid.type == UA_BASE_PAV_ALIAS || |
1917 | private->uid.type == UA_HYPER_PAV_ALIAS) | |
12d7b107 | 1918 | return 0; |
40545573 | 1919 | if (dasd_nopav || MACHINE_IS_VM) |
f3eb5384 SW |
1920 | enable_pav = 0; |
1921 | else | |
1922 | enable_pav = 1; | |
12d7b107 | 1923 | rc = dasd_eckd_psf_ssc(device, enable_pav, flags); |
eb6e199b | 1924 | |
8e79a441 HH |
1925 | /* may be requested feature is not available on server, |
1926 | * therefore just report error and go ahead */ | |
b8ed5dd5 SH |
1927 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " |
1928 | "returned rc=%d", private->uid.ssid, rc); | |
12d7b107 | 1929 | return rc; |
40545573 HH |
1930 | } |
1931 | ||
f1633031 SH |
1932 | /* |
1933 | * worker to do a validate server in case of a lost pathgroup | |
1934 | */ | |
1935 | static void dasd_eckd_do_validate_server(struct work_struct *work) | |
1936 | { | |
1937 | struct dasd_device *device = container_of(work, struct dasd_device, | |
1938 | kick_validate); | |
ea4da6ea SH |
1939 | unsigned long flags = 0; |
1940 | ||
1941 | set_bit(DASD_CQR_FLAGS_FAILFAST, &flags); | |
1942 | if (dasd_eckd_validate_server(device, flags) | |
12d7b107 SH |
1943 | == -EAGAIN) { |
1944 | /* schedule worker again if failed */ | |
1945 | schedule_work(&device->kick_validate); | |
1946 | return; | |
1947 | } | |
1948 | ||
f1633031 SH |
1949 | dasd_put_device(device); |
1950 | } | |
1951 | ||
1952 | static void dasd_eckd_kick_validate_server(struct dasd_device *device) | |
1953 | { | |
1954 | dasd_get_device(device); | |
25e2cf1c SH |
1955 | /* exit if device not online or in offline processing */ |
1956 | if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || | |
1957 | device->state < DASD_STATE_ONLINE) { | |
1958 | dasd_put_device(device); | |
1959 | return; | |
1960 | } | |
f1633031 | 1961 | /* queue call to do_validate_server to the kernel event daemon. */ |
f2608cd4 SH |
1962 | if (!schedule_work(&device->kick_validate)) |
1963 | dasd_put_device(device); | |
f1633031 SH |
1964 | } |
1965 | ||
3d052595 HH |
1966 | /* |
1967 | * Check device characteristics. | |
1968 | * If the device is accessible using ECKD discipline, the device is enabled. | |
1969 | */ | |
1da177e4 LT |
1970 | static int |
1971 | dasd_eckd_check_characteristics(struct dasd_device *device) | |
1972 | { | |
543691a4 | 1973 | struct dasd_eckd_private *private = device->private; |
8e09f215 | 1974 | struct dasd_block *block; |
2dedf0d9 | 1975 | struct dasd_uid temp_uid; |
f9f8d02f | 1976 | int rc, i; |
33b62a30 | 1977 | int readonly; |
7c8faa86 | 1978 | unsigned long value; |
1da177e4 | 1979 | |
f1633031 SH |
1980 | /* setup work queue for validate server*/ |
1981 | INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); | |
59a9ed5f SH |
1982 | /* setup work queue for summary unit check */ |
1983 | INIT_WORK(&device->suc_work, dasd_alias_handle_summary_unit_check); | |
f1633031 | 1984 | |
454e1fa1 PO |
1985 | if (!ccw_device_is_pathgroup(device->cdev)) { |
1986 | dev_warn(&device->cdev->dev, | |
1987 | "A channel path group could not be established\n"); | |
1988 | return -EIO; | |
1989 | } | |
1990 | if (!ccw_device_is_multipath(device->cdev)) { | |
1991 | dev_info(&device->cdev->dev, | |
1992 | "The DASD is not operating in multipath mode\n"); | |
1993 | } | |
92636b15 SO |
1994 | if (!private) { |
1995 | private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); | |
1996 | if (!private) { | |
fc19f381 SH |
1997 | dev_warn(&device->cdev->dev, |
1998 | "Allocating memory for private DASD data " | |
1999 | "failed\n"); | |
1da177e4 LT |
2000 | return -ENOMEM; |
2001 | } | |
543691a4 | 2002 | device->private = private; |
92636b15 SO |
2003 | } else { |
2004 | memset(private, 0, sizeof(*private)); | |
1da177e4 LT |
2005 | } |
2006 | /* Invalidate status of initial analysis. */ | |
2007 | private->init_cqr_status = -1; | |
2008 | /* Set default cache operations. */ | |
2009 | private->attrib.operation = DASD_NORMAL_CACHE; | |
2010 | private->attrib.nr_cyl = 0; | |
2011 | ||
40545573 HH |
2012 | /* Read Configuration Data */ |
2013 | rc = dasd_eckd_read_conf(device); | |
2014 | if (rc) | |
8e09f215 | 2015 | goto out_err1; |
40545573 | 2016 | |
a521b048 | 2017 | /* set some default values */ |
7c8faa86 | 2018 | device->default_expires = DASD_EXPIRES; |
1f1ee9ad | 2019 | device->default_retries = DASD_RETRIES; |
a521b048 SH |
2020 | device->path_thrhld = DASD_ECKD_PATH_THRHLD; |
2021 | device->path_interval = DASD_ECKD_PATH_INTERVAL; | |
1f1ee9ad | 2022 | |
7c8faa86 SH |
2023 | if (private->gneq) { |
2024 | value = 1; | |
2025 | for (i = 0; i < private->gneq->timeout.value; i++) | |
2026 | value = 10 * value; | |
2027 | value = value * private->gneq->timeout.number; | |
2028 | /* do not accept useless values */ | |
2029 | if (value != 0 && value <= DASD_EXPIRES_MAX) | |
2030 | device->default_expires = value; | |
2031 | } | |
2032 | ||
2dedf0d9 SH |
2033 | dasd_eckd_get_uid(device, &temp_uid); |
2034 | if (temp_uid.type == UA_BASE_DEVICE) { | |
8e09f215 SW |
2035 | block = dasd_alloc_block(); |
2036 | if (IS_ERR(block)) { | |
b8ed5dd5 SH |
2037 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", |
2038 | "could not allocate dasd " | |
2039 | "block structure"); | |
8e09f215 SW |
2040 | rc = PTR_ERR(block); |
2041 | goto out_err1; | |
2042 | } | |
2043 | device->block = block; | |
2044 | block->base = device; | |
2045 | } | |
2046 | ||
f9f8d02f SH |
2047 | /* register lcu with alias handling, enable PAV */ |
2048 | rc = dasd_alias_make_device_known_to_lcu(device); | |
2049 | if (rc) | |
8e09f215 | 2050 | goto out_err2; |
f9f8d02f | 2051 | |
12d7b107 | 2052 | dasd_eckd_validate_server(device, 0); |
f4ac1d02 SW |
2053 | |
2054 | /* device may report different configuration data after LCU setup */ | |
2055 | rc = dasd_eckd_read_conf(device); | |
2056 | if (rc) | |
2057 | goto out_err3; | |
8e09f215 SW |
2058 | |
2059 | /* Read Feature Codes */ | |
68d1e5f0 | 2060 | dasd_eckd_read_features(device); |
40545573 | 2061 | |
c729696b | 2062 | /* Read Volume Information */ |
dd454839 | 2063 | dasd_eckd_read_vol_info(device); |
c729696b JH |
2064 | |
2065 | /* Read Extent Pool Information */ | |
dd454839 | 2066 | dasd_eckd_read_ext_pool_info(device); |
c729696b | 2067 | |
1da177e4 | 2068 | /* Read Device Characteristics */ |
68b781fe SH |
2069 | rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, |
2070 | &private->rdc_data, 64); | |
8e09f215 | 2071 | if (rc) { |
b8ed5dd5 SH |
2072 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, |
2073 | "Read device characteristic failed, rc=%d", rc); | |
8e09f215 SW |
2074 | goto out_err3; |
2075 | } | |
34cd551a SH |
2076 | |
2077 | if ((device->features & DASD_FEATURE_USERAW) && | |
2078 | !(private->rdc_data.facilities.RT_in_LR)) { | |
2079 | dev_err(&device->cdev->dev, "The storage server does not " | |
2080 | "support raw-track access\n"); | |
2081 | rc = -EINVAL; | |
2082 | goto out_err3; | |
2083 | } | |
2084 | ||
817f2c84 | 2085 | /* find the valid cylinder size */ |
b44b0ab3 SW |
2086 | if (private->rdc_data.no_cyl == LV_COMPAT_CYL && |
2087 | private->rdc_data.long_no_cyl) | |
2088 | private->real_cyl = private->rdc_data.long_no_cyl; | |
2089 | else | |
2090 | private->real_cyl = private->rdc_data.no_cyl; | |
2091 | ||
ef19298b SW |
2092 | private->fcx_max_data = get_fcx_max_data(device); |
2093 | ||
33b62a30 SW |
2094 | readonly = dasd_device_is_ro(device); |
2095 | if (readonly) | |
2096 | set_bit(DASD_FLAG_DEVICE_RO, &device->flags); | |
2097 | ||
fc19f381 | 2098 | dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " |
33b62a30 | 2099 | "with %d cylinders, %d heads, %d sectors%s\n", |
fc19f381 SH |
2100 | private->rdc_data.dev_type, |
2101 | private->rdc_data.dev_model, | |
2102 | private->rdc_data.cu_type, | |
2103 | private->rdc_data.cu_model.model, | |
92636b15 | 2104 | private->real_cyl, |
fc19f381 | 2105 | private->rdc_data.trk_per_cyl, |
33b62a30 SW |
2106 | private->rdc_data.sec_per_trk, |
2107 | readonly ? ", read-only device" : ""); | |
8e09f215 SW |
2108 | return 0; |
2109 | ||
2110 | out_err3: | |
2111 | dasd_alias_disconnect_device_from_lcu(device); | |
2112 | out_err2: | |
2113 | dasd_free_block(device->block); | |
2114 | device->block = NULL; | |
2115 | out_err1: | |
00b39f69 | 2116 | dasd_eckd_clear_conf_data(device); |
8e09f215 SW |
2117 | kfree(device->private); |
2118 | device->private = NULL; | |
3d052595 | 2119 | return rc; |
1da177e4 LT |
2120 | } |
2121 | ||
8e09f215 SW |
2122 | static void dasd_eckd_uncheck_device(struct dasd_device *device) |
2123 | { | |
543691a4 | 2124 | struct dasd_eckd_private *private = device->private; |
4abb08c2 | 2125 | |
7c6553d4 SH |
2126 | if (!private) |
2127 | return; | |
2128 | ||
8e09f215 | 2129 | dasd_alias_disconnect_device_from_lcu(device); |
4abb08c2 SW |
2130 | private->ned = NULL; |
2131 | private->sneq = NULL; | |
2132 | private->vdsneq = NULL; | |
2133 | private->gneq = NULL; | |
00b39f69 | 2134 | dasd_eckd_clear_conf_data(device); |
8e09f215 SW |
2135 | } |
2136 | ||
1da177e4 LT |
2137 | static struct dasd_ccw_req * |
2138 | dasd_eckd_analysis_ccw(struct dasd_device *device) | |
2139 | { | |
543691a4 | 2140 | struct dasd_eckd_private *private = device->private; |
1da177e4 LT |
2141 | struct eckd_count *count_data; |
2142 | struct LO_eckd_data *LO_data; | |
2143 | struct dasd_ccw_req *cqr; | |
2144 | struct ccw1 *ccw; | |
2145 | int cplength, datasize; | |
2146 | int i; | |
2147 | ||
1da177e4 LT |
2148 | cplength = 8; |
2149 | datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); | |
c5205f2f SO |
2150 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device, |
2151 | NULL); | |
1da177e4 LT |
2152 | if (IS_ERR(cqr)) |
2153 | return cqr; | |
2154 | ccw = cqr->cpaddr; | |
ce6915f5 JH |
2155 | /* Define extent for the first 2 tracks. */ |
2156 | define_extent(ccw++, cqr->data, 0, 1, | |
45f186be | 2157 | DASD_ECKD_CCW_READ_COUNT, device, 0); |
8e09f215 | 2158 | LO_data = cqr->data + sizeof(struct DE_eckd_data); |
1da177e4 LT |
2159 | /* Locate record for the first 4 records on track 0. */ |
2160 | ccw[-1].flags |= CCW_FLAG_CC; | |
2161 | locate_record(ccw++, LO_data++, 0, 0, 4, | |
2162 | DASD_ECKD_CCW_READ_COUNT, device, 0); | |
2163 | ||
2164 | count_data = private->count_area; | |
2165 | for (i = 0; i < 4; i++) { | |
2166 | ccw[-1].flags |= CCW_FLAG_CC; | |
2167 | ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; | |
2168 | ccw->flags = 0; | |
2169 | ccw->count = 8; | |
2170 | ccw->cda = (__u32)(addr_t) count_data; | |
2171 | ccw++; | |
2172 | count_data++; | |
2173 | } | |
2174 | ||
ce6915f5 | 2175 | /* Locate record for the first record on track 1. */ |
1da177e4 | 2176 | ccw[-1].flags |= CCW_FLAG_CC; |
ce6915f5 | 2177 | locate_record(ccw++, LO_data++, 1, 0, 1, |
1da177e4 LT |
2178 | DASD_ECKD_CCW_READ_COUNT, device, 0); |
2179 | /* Read count ccw. */ | |
2180 | ccw[-1].flags |= CCW_FLAG_CC; | |
2181 | ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; | |
2182 | ccw->flags = 0; | |
2183 | ccw->count = 8; | |
2184 | ccw->cda = (__u32)(addr_t) count_data; | |
2185 | ||
8e09f215 SW |
2186 | cqr->block = NULL; |
2187 | cqr->startdev = device; | |
2188 | cqr->memdev = device; | |
eb6e199b | 2189 | cqr->retries = 255; |
1aae0560 | 2190 | cqr->buildclk = get_tod_clock(); |
1da177e4 | 2191 | cqr->status = DASD_CQR_FILLED; |
9e12e54c JH |
2192 | /* Set flags to suppress output for expected errors */ |
2193 | set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); | |
2194 | ||
1da177e4 LT |
2195 | return cqr; |
2196 | } | |
2197 | ||
eb6e199b SW |
2198 | /* differentiate between 'no record found' and any other error */ |
2199 | static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) | |
2200 | { | |
2201 | char *sense; | |
2202 | if (init_cqr->status == DASD_CQR_DONE) | |
2203 | return INIT_CQR_OK; | |
2204 | else if (init_cqr->status == DASD_CQR_NEED_ERP || | |
2205 | init_cqr->status == DASD_CQR_FAILED) { | |
2206 | sense = dasd_get_sense(&init_cqr->irb); | |
2207 | if (sense && (sense[1] & SNS1_NO_REC_FOUND)) | |
2208 | return INIT_CQR_UNFORMATTED; | |
2209 | else | |
2210 | return INIT_CQR_ERROR; | |
2211 | } else | |
2212 | return INIT_CQR_ERROR; | |
2213 | } | |
2214 | ||
1da177e4 LT |
2215 | /* |
2216 | * This is the callback function for the init_analysis cqr. It saves | |
2217 | * the status of the initial analysis ccw before it frees it and kicks | |
2218 | * the device to continue the startup sequence. This will call | |
2219 | * dasd_eckd_do_analysis again (if the devices has not been marked | |
2220 | * for deletion in the meantime). | |
2221 | */ | |
eb6e199b SW |
2222 | static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, |
2223 | void *data) | |
1da177e4 | 2224 | { |
543691a4 SO |
2225 | struct dasd_device *device = init_cqr->startdev; |
2226 | struct dasd_eckd_private *private = device->private; | |
1da177e4 | 2227 | |
eb6e199b | 2228 | private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); |
1da177e4 LT |
2229 | dasd_sfree_request(init_cqr, device); |
2230 | dasd_kick_device(device); | |
2231 | } | |
2232 | ||
eb6e199b | 2233 | static int dasd_eckd_start_analysis(struct dasd_block *block) |
1da177e4 | 2234 | { |
1da177e4 LT |
2235 | struct dasd_ccw_req *init_cqr; |
2236 | ||
8e09f215 | 2237 | init_cqr = dasd_eckd_analysis_ccw(block->base); |
1da177e4 LT |
2238 | if (IS_ERR(init_cqr)) |
2239 | return PTR_ERR(init_cqr); | |
2240 | init_cqr->callback = dasd_eckd_analysis_callback; | |
2241 | init_cqr->callback_data = NULL; | |
2242 | init_cqr->expires = 5*HZ; | |
eb6e199b SW |
2243 | /* first try without ERP, so we can later handle unformatted |
2244 | * devices as special case | |
2245 | */ | |
2246 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); | |
2247 | init_cqr->retries = 0; | |
1da177e4 LT |
2248 | dasd_add_request_head(init_cqr); |
2249 | return -EAGAIN; | |
2250 | } | |
2251 | ||
eb6e199b | 2252 | static int dasd_eckd_end_analysis(struct dasd_block *block) |
1da177e4 | 2253 | { |
543691a4 SO |
2254 | struct dasd_device *device = block->base; |
2255 | struct dasd_eckd_private *private = device->private; | |
1da177e4 LT |
2256 | struct eckd_count *count_area; |
2257 | unsigned int sb, blk_per_trk; | |
2258 | int status, i; | |
eb6e199b | 2259 | struct dasd_ccw_req *init_cqr; |
1da177e4 | 2260 | |
1da177e4 LT |
2261 | status = private->init_cqr_status; |
2262 | private->init_cqr_status = -1; | |
eb6e199b SW |
2263 | if (status == INIT_CQR_ERROR) { |
2264 | /* try again, this time with full ERP */ | |
2265 | init_cqr = dasd_eckd_analysis_ccw(device); | |
2266 | dasd_sleep_on(init_cqr); | |
2267 | status = dasd_eckd_analysis_evaluation(init_cqr); | |
2268 | dasd_sfree_request(init_cqr, device); | |
2269 | } | |
2270 | ||
e4dbb0f2 SH |
2271 | if (device->features & DASD_FEATURE_USERAW) { |
2272 | block->bp_block = DASD_RAW_BLOCKSIZE; | |
2273 | blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; | |
2274 | block->s2b_shift = 3; | |
2275 | goto raw; | |
2276 | } | |
2277 | ||
eb6e199b SW |
2278 | if (status == INIT_CQR_UNFORMATTED) { |
2279 | dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); | |
1da177e4 | 2280 | return -EMEDIUMTYPE; |
eb6e199b SW |
2281 | } else if (status == INIT_CQR_ERROR) { |
2282 | dev_err(&device->cdev->dev, | |
2283 | "Detecting the DASD disk layout failed because " | |
2284 | "of an I/O error\n"); | |
2285 | return -EIO; | |
1da177e4 LT |
2286 | } |
2287 | ||
2288 | private->uses_cdl = 1; | |
1da177e4 LT |
2289 | /* Check Track 0 for Compatible Disk Layout */ |
2290 | count_area = NULL; | |
2291 | for (i = 0; i < 3; i++) { | |
2292 | if (private->count_area[i].kl != 4 || | |
3bc9fef9 SH |
2293 | private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 || |
2294 | private->count_area[i].cyl != 0 || | |
2295 | private->count_area[i].head != count_area_head[i] || | |
2296 | private->count_area[i].record != count_area_rec[i]) { | |
1da177e4 LT |
2297 | private->uses_cdl = 0; |
2298 | break; | |
2299 | } | |
2300 | } | |
2301 | if (i == 3) | |
ce6915f5 | 2302 | count_area = &private->count_area[3]; |
1da177e4 LT |
2303 | |
2304 | if (private->uses_cdl == 0) { | |
2305 | for (i = 0; i < 5; i++) { | |
2306 | if ((private->count_area[i].kl != 0) || | |
2307 | (private->count_area[i].dl != | |
3bc9fef9 SH |
2308 | private->count_area[0].dl) || |
2309 | private->count_area[i].cyl != 0 || | |
2310 | private->count_area[i].head != count_area_head[i] || | |
2311 | private->count_area[i].record != count_area_rec[i]) | |
1da177e4 LT |
2312 | break; |
2313 | } | |
2314 | if (i == 5) | |
2315 | count_area = &private->count_area[0]; | |
2316 | } else { | |
2317 | if (private->count_area[3].record == 1) | |
fc19f381 SH |
2318 | dev_warn(&device->cdev->dev, |
2319 | "Track 0 has no records following the VTOC\n"); | |
1da177e4 | 2320 | } |
e4dbb0f2 | 2321 | |
1da177e4 LT |
2322 | if (count_area != NULL && count_area->kl == 0) { |
2323 | /* we found notthing violating our disk layout */ | |
2324 | if (dasd_check_blocksize(count_area->dl) == 0) | |
8e09f215 | 2325 | block->bp_block = count_area->dl; |
1da177e4 | 2326 | } |
8e09f215 | 2327 | if (block->bp_block == 0) { |
fc19f381 SH |
2328 | dev_warn(&device->cdev->dev, |
2329 | "The disk layout of the DASD is not supported\n"); | |
1da177e4 LT |
2330 | return -EMEDIUMTYPE; |
2331 | } | |
8e09f215 SW |
2332 | block->s2b_shift = 0; /* bits to shift 512 to get a block */ |
2333 | for (sb = 512; sb < block->bp_block; sb = sb << 1) | |
2334 | block->s2b_shift++; | |
1da177e4 | 2335 | |
8e09f215 | 2336 | blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); |
e4dbb0f2 SH |
2337 | |
2338 | raw: | |
2cc9637c | 2339 | block->blocks = ((unsigned long) private->real_cyl * |
1da177e4 LT |
2340 | private->rdc_data.trk_per_cyl * |
2341 | blk_per_trk); | |
2342 | ||
fc19f381 | 2343 | dev_info(&device->cdev->dev, |
2cc9637c | 2344 | "DASD with %u KB/block, %lu KB total size, %u KB/track, " |
fc19f381 | 2345 | "%s\n", (block->bp_block >> 10), |
2cc9637c | 2346 | (((unsigned long) private->real_cyl * |
fc19f381 SH |
2347 | private->rdc_data.trk_per_cyl * |
2348 | blk_per_trk * (block->bp_block >> 9)) >> 1), | |
2349 | ((blk_per_trk * block->bp_block) >> 10), | |
2350 | private->uses_cdl ? | |
2351 | "compatible disk layout" : "linux disk layout"); | |
1da177e4 LT |
2352 | |
2353 | return 0; | |
2354 | } | |
2355 | ||
8e09f215 | 2356 | static int dasd_eckd_do_analysis(struct dasd_block *block) |
1da177e4 | 2357 | { |
543691a4 | 2358 | struct dasd_eckd_private *private = block->base->private; |
1da177e4 | 2359 | |
1da177e4 | 2360 | if (private->init_cqr_status < 0) |
8e09f215 | 2361 | return dasd_eckd_start_analysis(block); |
1da177e4 | 2362 | else |
8e09f215 | 2363 | return dasd_eckd_end_analysis(block); |
1da177e4 LT |
2364 | } |
2365 | ||
d42e1712 | 2366 | static int dasd_eckd_basic_to_ready(struct dasd_device *device) |
8e09f215 SW |
2367 | { |
2368 | return dasd_alias_add_device(device); | |
2369 | }; | |
2370 | ||
2371 | static int dasd_eckd_online_to_ready(struct dasd_device *device) | |
2372 | { | |
669f3765 SH |
2373 | if (cancel_work_sync(&device->reload_device)) |
2374 | dasd_put_device(device); | |
2375 | if (cancel_work_sync(&device->kick_validate)) | |
2376 | dasd_put_device(device); | |
2377 | ||
d42e1712 SH |
2378 | return 0; |
2379 | }; | |
2380 | ||
daa991bf | 2381 | static int dasd_eckd_basic_to_known(struct dasd_device *device) |
d42e1712 | 2382 | { |
8e09f215 SW |
2383 | return dasd_alias_remove_device(device); |
2384 | }; | |
2385 | ||
1da177e4 | 2386 | static int |
8e09f215 | 2387 | dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) |
1da177e4 | 2388 | { |
543691a4 | 2389 | struct dasd_eckd_private *private = block->base->private; |
1da177e4 | 2390 | |
8e09f215 | 2391 | if (dasd_check_blocksize(block->bp_block) == 0) { |
1da177e4 | 2392 | geo->sectors = recs_per_track(&private->rdc_data, |
8e09f215 | 2393 | 0, block->bp_block); |
1da177e4 LT |
2394 | } |
2395 | geo->cylinders = private->rdc_data.no_cyl; | |
2396 | geo->heads = private->rdc_data.trk_per_cyl; | |
2397 | return 0; | |
2398 | } | |
2399 | ||
8fd57520 JH |
2400 | /* |
2401 | * Build the TCW request for the format check | |
2402 | */ | |
2403 | static struct dasd_ccw_req * | |
2404 | dasd_eckd_build_check_tcw(struct dasd_device *base, struct format_data_t *fdata, | |
2405 | int enable_pav, struct eckd_count *fmt_buffer, | |
2406 | int rpt) | |
2407 | { | |
2408 | struct dasd_eckd_private *start_priv; | |
2409 | struct dasd_device *startdev = NULL; | |
2410 | struct tidaw *last_tidaw = NULL; | |
2411 | struct dasd_ccw_req *cqr; | |
2412 | struct itcw *itcw; | |
2413 | int itcw_size; | |
2414 | int count; | |
2415 | int rc; | |
2416 | int i; | |
2417 | ||
2418 | if (enable_pav) | |
2419 | startdev = dasd_alias_get_start_dev(base); | |
2420 | ||
2421 | if (!startdev) | |
2422 | startdev = base; | |
2423 | ||
2424 | start_priv = startdev->private; | |
2425 | ||
2426 | count = rpt * (fdata->stop_unit - fdata->start_unit + 1); | |
2427 | ||
2428 | /* | |
2429 | * we're adding 'count' amount of tidaw to the itcw. | |
2430 | * calculate the corresponding itcw_size | |
2431 | */ | |
2432 | itcw_size = itcw_calc_size(0, count, 0); | |
2433 | ||
5e2b17e7 | 2434 | cqr = dasd_fmalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); |
8fd57520 JH |
2435 | if (IS_ERR(cqr)) |
2436 | return cqr; | |
2437 | ||
2438 | start_priv->count++; | |
2439 | ||
2440 | itcw = itcw_init(cqr->data, itcw_size, ITCW_OP_READ, 0, count, 0); | |
2441 | if (IS_ERR(itcw)) { | |
2442 | rc = -EINVAL; | |
2443 | goto out_err; | |
2444 | } | |
2445 | ||
2446 | cqr->cpaddr = itcw_get_tcw(itcw); | |
2447 | rc = prepare_itcw(itcw, fdata->start_unit, fdata->stop_unit, | |
2448 | DASD_ECKD_CCW_READ_COUNT_MT, base, startdev, 0, count, | |
2449 | sizeof(struct eckd_count), | |
2450 | count * sizeof(struct eckd_count), 0, rpt); | |
2451 | if (rc) | |
2452 | goto out_err; | |
2453 | ||
2454 | for (i = 0; i < count; i++) { | |
2455 | last_tidaw = itcw_add_tidaw(itcw, 0, fmt_buffer++, | |
2456 | sizeof(struct eckd_count)); | |
2457 | if (IS_ERR(last_tidaw)) { | |
2458 | rc = -EINVAL; | |
2459 | goto out_err; | |
2460 | } | |
2461 | } | |
2462 | ||
2463 | last_tidaw->flags |= TIDAW_FLAGS_LAST; | |
2464 | itcw_finalize(itcw); | |
2465 | ||
2466 | cqr->cpmode = 1; | |
2467 | cqr->startdev = startdev; | |
2468 | cqr->memdev = startdev; | |
2469 | cqr->basedev = base; | |
2470 | cqr->retries = startdev->default_retries; | |
2471 | cqr->expires = startdev->default_expires * HZ; | |
2472 | cqr->buildclk = get_tod_clock(); | |
2473 | cqr->status = DASD_CQR_FILLED; | |
2474 | /* Set flags to suppress output for expected errors */ | |
2475 | set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); | |
2476 | set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); | |
2477 | ||
2478 | return cqr; | |
2479 | ||
2480 | out_err: | |
2481 | dasd_sfree_request(cqr, startdev); | |
2482 | ||
2483 | return ERR_PTR(rc); | |
2484 | } | |
2485 | ||
2486 | /* | |
2487 | * Build the CCW request for the format check | |
2488 | */ | |
2489 | static struct dasd_ccw_req * | |
2490 | dasd_eckd_build_check(struct dasd_device *base, struct format_data_t *fdata, | |
2491 | int enable_pav, struct eckd_count *fmt_buffer, int rpt) | |
2492 | { | |
2493 | struct dasd_eckd_private *start_priv; | |
2494 | struct dasd_eckd_private *base_priv; | |
2495 | struct dasd_device *startdev = NULL; | |
2496 | struct dasd_ccw_req *cqr; | |
2497 | struct ccw1 *ccw; | |
2498 | void *data; | |
2499 | int cplength, datasize; | |
2500 | int use_prefix; | |
2501 | int count; | |
2502 | int i; | |
2503 | ||
2504 | if (enable_pav) | |
2505 | startdev = dasd_alias_get_start_dev(base); | |
2506 | ||
2507 | if (!startdev) | |
2508 | startdev = base; | |
2509 | ||
2510 | start_priv = startdev->private; | |
2511 | base_priv = base->private; | |
2512 | ||
2513 | count = rpt * (fdata->stop_unit - fdata->start_unit + 1); | |
2514 | ||
2515 | use_prefix = base_priv->features.feature[8] & 0x01; | |
2516 | ||
2517 | if (use_prefix) { | |
2518 | cplength = 1; | |
2519 | datasize = sizeof(struct PFX_eckd_data); | |
2520 | } else { | |
2521 | cplength = 2; | |
2522 | datasize = sizeof(struct DE_eckd_data) + | |
2523 | sizeof(struct LO_eckd_data); | |
2524 | } | |
2525 | cplength += count; | |
2526 | ||
5e2b17e7 | 2527 | cqr = dasd_fmalloc_request(DASD_ECKD_MAGIC, cplength, datasize, startdev); |
8fd57520 JH |
2528 | if (IS_ERR(cqr)) |
2529 | return cqr; | |
2530 | ||
2531 | start_priv->count++; | |
2532 | data = cqr->data; | |
2533 | ccw = cqr->cpaddr; | |
2534 | ||
2535 | if (use_prefix) { | |
2536 | prefix_LRE(ccw++, data, fdata->start_unit, fdata->stop_unit, | |
2537 | DASD_ECKD_CCW_READ_COUNT, base, startdev, 1, 0, | |
2538 | count, 0, 0); | |
2539 | } else { | |
2540 | define_extent(ccw++, data, fdata->start_unit, fdata->stop_unit, | |
45f186be | 2541 | DASD_ECKD_CCW_READ_COUNT, startdev, 0); |
8fd57520 JH |
2542 | |
2543 | data += sizeof(struct DE_eckd_data); | |
2544 | ccw[-1].flags |= CCW_FLAG_CC; | |
2545 | ||
2546 | locate_record(ccw++, data, fdata->start_unit, 0, count, | |
2547 | DASD_ECKD_CCW_READ_COUNT, base, 0); | |
2548 | } | |
2549 | ||
2550 | for (i = 0; i < count; i++) { | |
2551 | ccw[-1].flags |= CCW_FLAG_CC; | |
2552 | ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; | |
2553 | ccw->flags = CCW_FLAG_SLI; | |
2554 | ccw->count = 8; | |
2555 | ccw->cda = (__u32)(addr_t) fmt_buffer; | |
2556 | ccw++; | |
2557 | fmt_buffer++; | |
2558 | } | |
2559 | ||
2560 | cqr->startdev = startdev; | |
2561 | cqr->memdev = startdev; | |
2562 | cqr->basedev = base; | |
2563 | cqr->retries = DASD_RETRIES; | |
2564 | cqr->expires = startdev->default_expires * HZ; | |
2565 | cqr->buildclk = get_tod_clock(); | |
2566 | cqr->status = DASD_CQR_FILLED; | |
2567 | /* Set flags to suppress output for expected errors */ | |
2568 | set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); | |
2569 | ||
2570 | return cqr; | |
2571 | } | |
2572 | ||
1da177e4 | 2573 | static struct dasd_ccw_req * |
5e2b17e7 JH |
2574 | dasd_eckd_build_format(struct dasd_device *base, struct dasd_device *startdev, |
2575 | struct format_data_t *fdata, int enable_pav) | |
1da177e4 | 2576 | { |
d42e1712 SH |
2577 | struct dasd_eckd_private *base_priv; |
2578 | struct dasd_eckd_private *start_priv; | |
1da177e4 LT |
2579 | struct dasd_ccw_req *fcp; |
2580 | struct eckd_count *ect; | |
d42e1712 | 2581 | struct ch_t address; |
1da177e4 LT |
2582 | struct ccw1 *ccw; |
2583 | void *data; | |
b44b0ab3 | 2584 | int rpt; |
1da177e4 | 2585 | int cplength, datasize; |
d42e1712 | 2586 | int i, j; |
f9a28f7b JBJ |
2587 | int intensity = 0; |
2588 | int r0_perm; | |
d42e1712 | 2589 | int nr_tracks; |
18d6624e | 2590 | int use_prefix; |
1da177e4 | 2591 | |
a94fa154 | 2592 | if (enable_pav) |
29b8dd9d SH |
2593 | startdev = dasd_alias_get_start_dev(base); |
2594 | ||
d42e1712 SH |
2595 | if (!startdev) |
2596 | startdev = base; | |
1da177e4 | 2597 | |
543691a4 SO |
2598 | start_priv = startdev->private; |
2599 | base_priv = base->private; | |
d42e1712 SH |
2600 | |
2601 | rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize); | |
2602 | ||
2603 | nr_tracks = fdata->stop_unit - fdata->start_unit + 1; | |
1da177e4 LT |
2604 | |
2605 | /* | |
2606 | * fdata->intensity is a bit string that tells us what to do: | |
2607 | * Bit 0: write record zero | |
2608 | * Bit 1: write home address, currently not supported | |
2609 | * Bit 2: invalidate tracks | |
2610 | * Bit 3: use OS/390 compatible disk layout (cdl) | |
f9a28f7b | 2611 | * Bit 4: do not allow storage subsystem to modify record zero |
1da177e4 LT |
2612 | * Only some bit combinations do make sense. |
2613 | */ | |
f9a28f7b JBJ |
2614 | if (fdata->intensity & 0x10) { |
2615 | r0_perm = 0; | |
2616 | intensity = fdata->intensity & ~0x10; | |
2617 | } else { | |
2618 | r0_perm = 1; | |
2619 | intensity = fdata->intensity; | |
2620 | } | |
d42e1712 | 2621 | |
18d6624e SH |
2622 | use_prefix = base_priv->features.feature[8] & 0x01; |
2623 | ||
f9a28f7b | 2624 | switch (intensity) { |
1da177e4 LT |
2625 | case 0x00: /* Normal format */ |
2626 | case 0x08: /* Normal format, use cdl. */ | |
d42e1712 | 2627 | cplength = 2 + (rpt*nr_tracks); |
18d6624e SH |
2628 | if (use_prefix) |
2629 | datasize = sizeof(struct PFX_eckd_data) + | |
2630 | sizeof(struct LO_eckd_data) + | |
2631 | rpt * nr_tracks * sizeof(struct eckd_count); | |
2632 | else | |
2633 | datasize = sizeof(struct DE_eckd_data) + | |
2634 | sizeof(struct LO_eckd_data) + | |
2635 | rpt * nr_tracks * sizeof(struct eckd_count); | |
1da177e4 LT |
2636 | break; |
2637 | case 0x01: /* Write record zero and format track. */ | |
2638 | case 0x09: /* Write record zero and format track, use cdl. */ | |
d42e1712 | 2639 | cplength = 2 + rpt * nr_tracks; |
18d6624e SH |
2640 | if (use_prefix) |
2641 | datasize = sizeof(struct PFX_eckd_data) + | |
2642 | sizeof(struct LO_eckd_data) + | |
2643 | sizeof(struct eckd_count) + | |
2644 | rpt * nr_tracks * sizeof(struct eckd_count); | |
2645 | else | |
2646 | datasize = sizeof(struct DE_eckd_data) + | |
2647 | sizeof(struct LO_eckd_data) + | |
2648 | sizeof(struct eckd_count) + | |
2649 | rpt * nr_tracks * sizeof(struct eckd_count); | |
1da177e4 LT |
2650 | break; |
2651 | case 0x04: /* Invalidate track. */ | |
2652 | case 0x0c: /* Invalidate track, use cdl. */ | |
2653 | cplength = 3; | |
18d6624e SH |
2654 | if (use_prefix) |
2655 | datasize = sizeof(struct PFX_eckd_data) + | |
2656 | sizeof(struct LO_eckd_data) + | |
2657 | sizeof(struct eckd_count); | |
2658 | else | |
2659 | datasize = sizeof(struct DE_eckd_data) + | |
2660 | sizeof(struct LO_eckd_data) + | |
2661 | sizeof(struct eckd_count); | |
1da177e4 LT |
2662 | break; |
2663 | default: | |
d42e1712 SH |
2664 | dev_warn(&startdev->cdev->dev, |
2665 | "An I/O control call used incorrect flags 0x%x\n", | |
2666 | fdata->intensity); | |
1da177e4 LT |
2667 | return ERR_PTR(-EINVAL); |
2668 | } | |
5e2b17e7 JH |
2669 | |
2670 | fcp = dasd_fmalloc_request(DASD_ECKD_MAGIC, cplength, datasize, startdev); | |
1da177e4 LT |
2671 | if (IS_ERR(fcp)) |
2672 | return fcp; | |
2673 | ||
d42e1712 | 2674 | start_priv->count++; |
1da177e4 LT |
2675 | data = fcp->data; |
2676 | ccw = fcp->cpaddr; | |
2677 | ||
f9a28f7b | 2678 | switch (intensity & ~0x08) { |
1da177e4 | 2679 | case 0x00: /* Normal format. */ |
18d6624e SH |
2680 | if (use_prefix) { |
2681 | prefix(ccw++, (struct PFX_eckd_data *) data, | |
2682 | fdata->start_unit, fdata->stop_unit, | |
2683 | DASD_ECKD_CCW_WRITE_CKD, base, startdev); | |
2684 | /* grant subsystem permission to format R0 */ | |
2685 | if (r0_perm) | |
2686 | ((struct PFX_eckd_data *)data) | |
2687 | ->define_extent.ga_extended |= 0x04; | |
2688 | data += sizeof(struct PFX_eckd_data); | |
2689 | } else { | |
2690 | define_extent(ccw++, (struct DE_eckd_data *) data, | |
2691 | fdata->start_unit, fdata->stop_unit, | |
45f186be | 2692 | DASD_ECKD_CCW_WRITE_CKD, startdev, 0); |
18d6624e SH |
2693 | /* grant subsystem permission to format R0 */ |
2694 | if (r0_perm) | |
2695 | ((struct DE_eckd_data *) data) | |
2696 | ->ga_extended |= 0x04; | |
2697 | data += sizeof(struct DE_eckd_data); | |
2698 | } | |
1da177e4 LT |
2699 | ccw[-1].flags |= CCW_FLAG_CC; |
2700 | locate_record(ccw++, (struct LO_eckd_data *) data, | |
d42e1712 SH |
2701 | fdata->start_unit, 0, rpt*nr_tracks, |
2702 | DASD_ECKD_CCW_WRITE_CKD, base, | |
1da177e4 LT |
2703 | fdata->blksize); |
2704 | data += sizeof(struct LO_eckd_data); | |
2705 | break; | |
2706 | case 0x01: /* Write record zero + format track. */ | |
18d6624e SH |
2707 | if (use_prefix) { |
2708 | prefix(ccw++, (struct PFX_eckd_data *) data, | |
2709 | fdata->start_unit, fdata->stop_unit, | |
2710 | DASD_ECKD_CCW_WRITE_RECORD_ZERO, | |
2711 | base, startdev); | |
2712 | data += sizeof(struct PFX_eckd_data); | |
2713 | } else { | |
2714 | define_extent(ccw++, (struct DE_eckd_data *) data, | |
2715 | fdata->start_unit, fdata->stop_unit, | |
45f186be | 2716 | DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev, 0); |
18d6624e SH |
2717 | data += sizeof(struct DE_eckd_data); |
2718 | } | |
1da177e4 LT |
2719 | ccw[-1].flags |= CCW_FLAG_CC; |
2720 | locate_record(ccw++, (struct LO_eckd_data *) data, | |
d42e1712 SH |
2721 | fdata->start_unit, 0, rpt * nr_tracks + 1, |
2722 | DASD_ECKD_CCW_WRITE_RECORD_ZERO, base, | |
2723 | base->block->bp_block); | |
1da177e4 LT |
2724 | data += sizeof(struct LO_eckd_data); |
2725 | break; | |
2726 | case 0x04: /* Invalidate track. */ | |
18d6624e SH |
2727 | if (use_prefix) { |
2728 | prefix(ccw++, (struct PFX_eckd_data *) data, | |
2729 | fdata->start_unit, fdata->stop_unit, | |
2730 | DASD_ECKD_CCW_WRITE_CKD, base, startdev); | |
2731 | data += sizeof(struct PFX_eckd_data); | |
2732 | } else { | |
2733 | define_extent(ccw++, (struct DE_eckd_data *) data, | |
2734 | fdata->start_unit, fdata->stop_unit, | |
45f186be | 2735 | DASD_ECKD_CCW_WRITE_CKD, startdev, 0); |
18d6624e SH |
2736 | data += sizeof(struct DE_eckd_data); |
2737 | } | |
1da177e4 LT |
2738 | ccw[-1].flags |= CCW_FLAG_CC; |
2739 | locate_record(ccw++, (struct LO_eckd_data *) data, | |
2740 | fdata->start_unit, 0, 1, | |
d42e1712 | 2741 | DASD_ECKD_CCW_WRITE_CKD, base, 8); |
1da177e4 LT |
2742 | data += sizeof(struct LO_eckd_data); |
2743 | break; | |
2744 | } | |
d42e1712 SH |
2745 | |
2746 | for (j = 0; j < nr_tracks; j++) { | |
2747 | /* calculate cylinder and head for the current track */ | |
2748 | set_ch_t(&address, | |
2749 | (fdata->start_unit + j) / | |
2750 | base_priv->rdc_data.trk_per_cyl, | |
2751 | (fdata->start_unit + j) % | |
2752 | base_priv->rdc_data.trk_per_cyl); | |
2753 | if (intensity & 0x01) { /* write record zero */ | |
1da177e4 LT |
2754 | ect = (struct eckd_count *) data; |
2755 | data += sizeof(struct eckd_count); | |
b44b0ab3 SW |
2756 | ect->cyl = address.cyl; |
2757 | ect->head = address.head; | |
d42e1712 | 2758 | ect->record = 0; |
1da177e4 | 2759 | ect->kl = 0; |
d42e1712 | 2760 | ect->dl = 8; |
1da177e4 | 2761 | ccw[-1].flags |= CCW_FLAG_CC; |
d42e1712 | 2762 | ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; |
1da177e4 LT |
2763 | ccw->flags = CCW_FLAG_SLI; |
2764 | ccw->count = 8; | |
2765 | ccw->cda = (__u32)(addr_t) ect; | |
2766 | ccw++; | |
2767 | } | |
d42e1712 SH |
2768 | if ((intensity & ~0x08) & 0x04) { /* erase track */ |
2769 | ect = (struct eckd_count *) data; | |
2770 | data += sizeof(struct eckd_count); | |
2771 | ect->cyl = address.cyl; | |
2772 | ect->head = address.head; | |
2773 | ect->record = 1; | |
2774 | ect->kl = 0; | |
2775 | ect->dl = 0; | |
2776 | ccw[-1].flags |= CCW_FLAG_CC; | |
2777 | ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; | |
2778 | ccw->flags = CCW_FLAG_SLI; | |
2779 | ccw->count = 8; | |
2780 | ccw->cda = (__u32)(addr_t) ect; | |
2781 | } else { /* write remaining records */ | |
2782 | for (i = 0; i < rpt; i++) { | |
2783 | ect = (struct eckd_count *) data; | |
2784 | data += sizeof(struct eckd_count); | |
2785 | ect->cyl = address.cyl; | |
2786 | ect->head = address.head; | |
2787 | ect->record = i + 1; | |
2788 | ect->kl = 0; | |
2789 | ect->dl = fdata->blksize; | |
2790 | /* | |
2791 | * Check for special tracks 0-1 | |
2792 | * when formatting CDL | |
2793 | */ | |
2794 | if ((intensity & 0x08) && | |
46d1c03c | 2795 | address.cyl == 0 && address.head == 0) { |
d42e1712 SH |
2796 | if (i < 3) { |
2797 | ect->kl = 4; | |
2798 | ect->dl = sizes_trk0[i] - 4; | |
2799 | } | |
2800 | } | |
2801 | if ((intensity & 0x08) && | |
46d1c03c | 2802 | address.cyl == 0 && address.head == 1) { |
d42e1712 SH |
2803 | ect->kl = 44; |
2804 | ect->dl = LABEL_SIZE - 44; | |
2805 | } | |
2806 | ccw[-1].flags |= CCW_FLAG_CC; | |
2807 | if (i != 0 || j == 0) | |
2808 | ccw->cmd_code = | |
2809 | DASD_ECKD_CCW_WRITE_CKD; | |
2810 | else | |
2811 | ccw->cmd_code = | |
2812 | DASD_ECKD_CCW_WRITE_CKD_MT; | |
2813 | ccw->flags = CCW_FLAG_SLI; | |
2814 | ccw->count = 8; | |
ba21d0ea SH |
2815 | ccw->cda = (__u32)(addr_t) ect; |
2816 | ccw++; | |
d42e1712 SH |
2817 | } |
2818 | } | |
1da177e4 | 2819 | } |
d42e1712 SH |
2820 | |
2821 | fcp->startdev = startdev; | |
2822 | fcp->memdev = startdev; | |
29b8dd9d | 2823 | fcp->basedev = base; |
eb6e199b | 2824 | fcp->retries = 256; |
d42e1712 | 2825 | fcp->expires = startdev->default_expires * HZ; |
1aae0560 | 2826 | fcp->buildclk = get_tod_clock(); |
1da177e4 | 2827 | fcp->status = DASD_CQR_FILLED; |
d42e1712 | 2828 | |
1da177e4 LT |
2829 | return fcp; |
2830 | } | |
2831 | ||
570d237c JH |
2832 | /* |
2833 | * Wrapper function to build a CCW request depending on input data | |
2834 | */ | |
2835 | static struct dasd_ccw_req * | |
2836 | dasd_eckd_format_build_ccw_req(struct dasd_device *base, | |
8fd57520 JH |
2837 | struct format_data_t *fdata, int enable_pav, |
2838 | int tpm, struct eckd_count *fmt_buffer, int rpt) | |
570d237c | 2839 | { |
8fd57520 JH |
2840 | struct dasd_ccw_req *ccw_req; |
2841 | ||
2842 | if (!fmt_buffer) { | |
5e2b17e7 | 2843 | ccw_req = dasd_eckd_build_format(base, NULL, fdata, enable_pav); |
8fd57520 JH |
2844 | } else { |
2845 | if (tpm) | |
2846 | ccw_req = dasd_eckd_build_check_tcw(base, fdata, | |
2847 | enable_pav, | |
2848 | fmt_buffer, rpt); | |
2849 | else | |
2850 | ccw_req = dasd_eckd_build_check(base, fdata, enable_pav, | |
2851 | fmt_buffer, rpt); | |
2852 | } | |
2853 | ||
2854 | return ccw_req; | |
570d237c JH |
2855 | } |
2856 | ||
2857 | /* | |
2858 | * Sanity checks on format_data | |
2859 | */ | |
2860 | static int dasd_eckd_format_sanity_checks(struct dasd_device *base, | |
2861 | struct format_data_t *fdata) | |
d42e1712 | 2862 | { |
543691a4 | 2863 | struct dasd_eckd_private *private = base->private; |
d42e1712 | 2864 | |
d42e1712 SH |
2865 | if (fdata->start_unit >= |
2866 | (private->real_cyl * private->rdc_data.trk_per_cyl)) { | |
2867 | dev_warn(&base->cdev->dev, | |
2868 | "Start track number %u used in formatting is too big\n", | |
2869 | fdata->start_unit); | |
2870 | return -EINVAL; | |
2871 | } | |
2872 | if (fdata->stop_unit >= | |
2873 | (private->real_cyl * private->rdc_data.trk_per_cyl)) { | |
2874 | dev_warn(&base->cdev->dev, | |
2875 | "Stop track number %u used in formatting is too big\n", | |
2876 | fdata->stop_unit); | |
2877 | return -EINVAL; | |
2878 | } | |
2879 | if (fdata->start_unit > fdata->stop_unit) { | |
2880 | dev_warn(&base->cdev->dev, | |
2881 | "Start track %u used in formatting exceeds end track\n", | |
2882 | fdata->start_unit); | |
2883 | return -EINVAL; | |
2884 | } | |
2885 | if (dasd_check_blocksize(fdata->blksize) != 0) { | |
2886 | dev_warn(&base->cdev->dev, | |
2887 | "The DASD cannot be formatted with block size %u\n", | |
2888 | fdata->blksize); | |
2889 | return -EINVAL; | |
2890 | } | |
570d237c JH |
2891 | return 0; |
2892 | } | |
2893 | ||
2894 | /* | |
2895 | * This function will process format_data originally coming from an IOCTL | |
2896 | */ | |
2897 | static int dasd_eckd_format_process_data(struct dasd_device *base, | |
2898 | struct format_data_t *fdata, | |
8fd57520 JH |
2899 | int enable_pav, int tpm, |
2900 | struct eckd_count *fmt_buffer, int rpt, | |
2901 | struct irb *irb) | |
570d237c | 2902 | { |
543691a4 | 2903 | struct dasd_eckd_private *private = base->private; |
570d237c | 2904 | struct dasd_ccw_req *cqr, *n; |
570d237c JH |
2905 | struct list_head format_queue; |
2906 | struct dasd_device *device; | |
8fd57520 | 2907 | char *sense = NULL; |
570d237c JH |
2908 | int old_start, old_stop, format_step; |
2909 | int step, retry; | |
2910 | int rc; | |
2911 | ||
570d237c JH |
2912 | rc = dasd_eckd_format_sanity_checks(base, fdata); |
2913 | if (rc) | |
2914 | return rc; | |
d42e1712 SH |
2915 | |
2916 | INIT_LIST_HEAD(&format_queue); | |
d42e1712 | 2917 | |
46d1c03c | 2918 | old_start = fdata->start_unit; |
29b8dd9d | 2919 | old_stop = fdata->stop_unit; |
d42e1712 | 2920 | |
8fd57520 JH |
2921 | if (!tpm && fmt_buffer != NULL) { |
2922 | /* Command Mode / Format Check */ | |
2923 | format_step = 1; | |
2924 | } else if (tpm && fmt_buffer != NULL) { | |
2925 | /* Transport Mode / Format Check */ | |
2926 | format_step = DASD_CQR_MAX_CCW / rpt; | |
2927 | } else { | |
2928 | /* Normal Formatting */ | |
2929 | format_step = DASD_CQR_MAX_CCW / | |
2930 | recs_per_track(&private->rdc_data, 0, fdata->blksize); | |
2931 | } | |
2932 | ||
46d1c03c JH |
2933 | do { |
2934 | retry = 0; | |
2935 | while (fdata->start_unit <= old_stop) { | |
2936 | step = fdata->stop_unit - fdata->start_unit + 1; | |
2937 | if (step > format_step) { | |
2938 | fdata->stop_unit = | |
2939 | fdata->start_unit + format_step - 1; | |
2940 | } | |
d42e1712 | 2941 | |
570d237c | 2942 | cqr = dasd_eckd_format_build_ccw_req(base, fdata, |
8fd57520 JH |
2943 | enable_pav, tpm, |
2944 | fmt_buffer, rpt); | |
46d1c03c JH |
2945 | if (IS_ERR(cqr)) { |
2946 | rc = PTR_ERR(cqr); | |
2947 | if (rc == -ENOMEM) { | |
2948 | if (list_empty(&format_queue)) | |
2949 | goto out; | |
2950 | /* | |
2951 | * not enough memory available, start | |
2952 | * requests retry after first requests | |
2953 | * were finished | |
2954 | */ | |
2955 | retry = 1; | |
2956 | break; | |
2957 | } | |
2958 | goto out_err; | |
2959 | } | |
2960 | list_add_tail(&cqr->blocklist, &format_queue); | |
d42e1712 | 2961 | |
8fd57520 JH |
2962 | if (fmt_buffer) { |
2963 | step = fdata->stop_unit - fdata->start_unit + 1; | |
2964 | fmt_buffer += rpt * step; | |
2965 | } | |
46d1c03c JH |
2966 | fdata->start_unit = fdata->stop_unit + 1; |
2967 | fdata->stop_unit = old_stop; | |
d42e1712 | 2968 | } |
d42e1712 | 2969 | |
46d1c03c JH |
2970 | rc = dasd_sleep_on_queue(&format_queue); |
2971 | ||
2972 | out_err: | |
2973 | list_for_each_entry_safe(cqr, n, &format_queue, blocklist) { | |
2974 | device = cqr->startdev; | |
543691a4 | 2975 | private = device->private; |
8fd57520 JH |
2976 | |
2977 | if (cqr->status == DASD_CQR_FAILED) { | |
2978 | /* | |
2979 | * Only get sense data if called by format | |
2980 | * check | |
2981 | */ | |
2982 | if (fmt_buffer && irb) { | |
2983 | sense = dasd_get_sense(&cqr->irb); | |
2984 | memcpy(irb, &cqr->irb, sizeof(*irb)); | |
2985 | } | |
46d1c03c | 2986 | rc = -EIO; |
8fd57520 | 2987 | } |
46d1c03c | 2988 | list_del_init(&cqr->blocklist); |
5e2b17e7 | 2989 | dasd_ffree_request(cqr, device); |
46d1c03c JH |
2990 | private->count--; |
2991 | } | |
d42e1712 | 2992 | |
8fd57520 | 2993 | if (rc && rc != -EIO) |
46d1c03c | 2994 | goto out; |
8fd57520 JH |
2995 | if (rc == -EIO) { |
2996 | /* | |
2997 | * In case fewer than the expected records are on the | |
2998 | * track, we will most likely get a 'No Record Found' | |
2999 | * error (in command mode) or a 'File Protected' error | |
3000 | * (in transport mode). Those particular cases shouldn't | |
3001 | * pass the -EIO to the IOCTL, therefore reset the rc | |
3002 | * and continue. | |
3003 | */ | |
3004 | if (sense && | |
3005 | (sense[1] & SNS1_NO_REC_FOUND || | |
3006 | sense[1] & SNS1_FILE_PROTECTED)) | |
3007 | retry = 1; | |
3008 | else | |
3009 | goto out; | |
3010 | } | |
d42e1712 | 3011 | |
46d1c03c | 3012 | } while (retry); |
29b8dd9d | 3013 | |
46d1c03c JH |
3014 | out: |
3015 | fdata->start_unit = old_start; | |
3016 | fdata->stop_unit = old_stop; | |
d42e1712 SH |
3017 | |
3018 | return rc; | |
3019 | } | |
3020 | ||
570d237c JH |
3021 | static int dasd_eckd_format_device(struct dasd_device *base, |
3022 | struct format_data_t *fdata, int enable_pav) | |
3023 | { | |
8fd57520 JH |
3024 | return dasd_eckd_format_process_data(base, fdata, enable_pav, 0, NULL, |
3025 | 0, NULL); | |
3026 | } | |
3027 | ||
5e6bdd37 SH |
3028 | static bool test_and_set_format_track(struct dasd_format_entry *to_format, |
3029 | struct dasd_block *block) | |
3030 | { | |
3031 | struct dasd_format_entry *format; | |
3032 | unsigned long flags; | |
3033 | bool rc = false; | |
3034 | ||
3035 | spin_lock_irqsave(&block->format_lock, flags); | |
3036 | list_for_each_entry(format, &block->format_list, list) { | |
3037 | if (format->track == to_format->track) { | |
3038 | rc = true; | |
3039 | goto out; | |
3040 | } | |
3041 | } | |
3042 | list_add_tail(&to_format->list, &block->format_list); | |
3043 | ||
3044 | out: | |
3045 | spin_unlock_irqrestore(&block->format_lock, flags); | |
3046 | return rc; | |
3047 | } | |
3048 | ||
3049 | static void clear_format_track(struct dasd_format_entry *format, | |
3050 | struct dasd_block *block) | |
3051 | { | |
3052 | unsigned long flags; | |
3053 | ||
3054 | spin_lock_irqsave(&block->format_lock, flags); | |
3055 | list_del_init(&format->list); | |
3056 | spin_unlock_irqrestore(&block->format_lock, flags); | |
3057 | } | |
3058 | ||
5e2b17e7 JH |
3059 | /* |
3060 | * Callback function to free ESE format requests. | |
3061 | */ | |
3062 | static void dasd_eckd_ese_format_cb(struct dasd_ccw_req *cqr, void *data) | |
3063 | { | |
3064 | struct dasd_device *device = cqr->startdev; | |
3065 | struct dasd_eckd_private *private = device->private; | |
5e6bdd37 | 3066 | struct dasd_format_entry *format = data; |
5e2b17e7 | 3067 | |
5e6bdd37 | 3068 | clear_format_track(format, cqr->basedev->block); |
5e2b17e7 JH |
3069 | private->count--; |
3070 | dasd_ffree_request(cqr, device); | |
3071 | } | |
3072 | ||
3073 | static struct dasd_ccw_req * | |
5e6bdd37 SH |
3074 | dasd_eckd_ese_format(struct dasd_device *startdev, struct dasd_ccw_req *cqr, |
3075 | struct irb *irb) | |
5e2b17e7 JH |
3076 | { |
3077 | struct dasd_eckd_private *private; | |
5e6bdd37 | 3078 | struct dasd_format_entry *format; |
5e2b17e7 JH |
3079 | struct format_data_t fdata; |
3080 | unsigned int recs_per_trk; | |
3081 | struct dasd_ccw_req *fcqr; | |
3082 | struct dasd_device *base; | |
3083 | struct dasd_block *block; | |
3084 | unsigned int blksize; | |
3085 | struct request *req; | |
3086 | sector_t first_trk; | |
3087 | sector_t last_trk; | |
5e6bdd37 | 3088 | sector_t curr_trk; |
5e2b17e7 JH |
3089 | int rc; |
3090 | ||
3091 | req = cqr->callback_data; | |
5e6bdd37 SH |
3092 | block = cqr->block; |
3093 | base = block->base; | |
5e2b17e7 | 3094 | private = base->private; |
5e2b17e7 JH |
3095 | blksize = block->bp_block; |
3096 | recs_per_trk = recs_per_track(&private->rdc_data, 0, blksize); | |
5e6bdd37 | 3097 | format = &startdev->format_entry; |
5e2b17e7 JH |
3098 | |
3099 | first_trk = blk_rq_pos(req) >> block->s2b_shift; | |
3100 | sector_div(first_trk, recs_per_trk); | |
3101 | last_trk = | |
3102 | (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; | |
3103 | sector_div(last_trk, recs_per_trk); | |
5e6bdd37 SH |
3104 | rc = dasd_eckd_track_from_irb(irb, base, &curr_trk); |
3105 | if (rc) | |
3106 | return ERR_PTR(rc); | |
3107 | ||
3108 | if (curr_trk < first_trk || curr_trk > last_trk) { | |
3109 | DBF_DEV_EVENT(DBF_WARNING, startdev, | |
3110 | "ESE error track %llu not within range %llu - %llu\n", | |
3111 | curr_trk, first_trk, last_trk); | |
3112 | return ERR_PTR(-EINVAL); | |
3113 | } | |
3114 | format->track = curr_trk; | |
3115 | /* test if track is already in formatting by another thread */ | |
3116 | if (test_and_set_format_track(format, block)) | |
3117 | return ERR_PTR(-EEXIST); | |
5e2b17e7 | 3118 | |
5e6bdd37 SH |
3119 | fdata.start_unit = curr_trk; |
3120 | fdata.stop_unit = curr_trk; | |
5e2b17e7 JH |
3121 | fdata.blksize = blksize; |
3122 | fdata.intensity = private->uses_cdl ? DASD_FMT_INT_COMPAT : 0; | |
3123 | ||
3124 | rc = dasd_eckd_format_sanity_checks(base, &fdata); | |
3125 | if (rc) | |
3126 | return ERR_PTR(-EINVAL); | |
3127 | ||
3128 | /* | |
3129 | * We're building the request with PAV disabled as we're reusing | |
3130 | * the former startdev. | |
3131 | */ | |
3132 | fcqr = dasd_eckd_build_format(base, startdev, &fdata, 0); | |
3133 | if (IS_ERR(fcqr)) | |
3134 | return fcqr; | |
3135 | ||
3136 | fcqr->callback = dasd_eckd_ese_format_cb; | |
5e6bdd37 | 3137 | fcqr->callback_data = (void *) format; |
5e2b17e7 JH |
3138 | |
3139 | return fcqr; | |
3140 | } | |
3141 | ||
3142 | /* | |
3143 | * When data is read from an unformatted area of an ESE volume, this function | |
3144 | * returns zeroed data and thereby mimics a read of zero data. | |
5e6bdd37 SH |
3145 | * |
3146 | * The first unformatted track is the one that got the NRF error, the address is | |
3147 | * encoded in the sense data. | |
3148 | * | |
3149 | * All tracks before have returned valid data and should not be touched. | |
3150 | * All tracks after the unformatted track might be formatted or not. This is | |
3151 | * currently not known, remember the processed data and return the remainder of | |
3152 | * the request to the blocklayer in __dasd_cleanup_cqr(). | |
5e2b17e7 | 3153 | */ |
5e6bdd37 | 3154 | static int dasd_eckd_ese_read(struct dasd_ccw_req *cqr, struct irb *irb) |
5e2b17e7 | 3155 | { |
5e6bdd37 SH |
3156 | struct dasd_eckd_private *private; |
3157 | sector_t first_trk, last_trk; | |
3158 | sector_t first_blk, last_blk; | |
5e2b17e7 | 3159 | unsigned int blksize, off; |
5e6bdd37 | 3160 | unsigned int recs_per_trk; |
5e2b17e7 JH |
3161 | struct dasd_device *base; |
3162 | struct req_iterator iter; | |
5e6bdd37 SH |
3163 | struct dasd_block *block; |
3164 | unsigned int skip_block; | |
3165 | unsigned int blk_count; | |
5e2b17e7 JH |
3166 | struct request *req; |
3167 | struct bio_vec bv; | |
5e6bdd37 SH |
3168 | sector_t curr_trk; |
3169 | sector_t end_blk; | |
5e2b17e7 | 3170 | char *dst; |
5e6bdd37 | 3171 | int rc; |
5e2b17e7 JH |
3172 | |
3173 | req = (struct request *) cqr->callback_data; | |
3174 | base = cqr->block->base; | |
3175 | blksize = base->block->bp_block; | |
5e6bdd37 SH |
3176 | block = cqr->block; |
3177 | private = base->private; | |
3178 | skip_block = 0; | |
3179 | blk_count = 0; | |
3180 | ||
3181 | recs_per_trk = recs_per_track(&private->rdc_data, 0, blksize); | |
3182 | first_trk = first_blk = blk_rq_pos(req) >> block->s2b_shift; | |
3183 | sector_div(first_trk, recs_per_trk); | |
3184 | last_trk = last_blk = | |
3185 | (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; | |
3186 | sector_div(last_trk, recs_per_trk); | |
3187 | rc = dasd_eckd_track_from_irb(irb, base, &curr_trk); | |
3188 | if (rc) | |
3189 | return rc; | |
3190 | ||
3191 | /* sanity check if the current track from sense data is valid */ | |
3192 | if (curr_trk < first_trk || curr_trk > last_trk) { | |
3193 | DBF_DEV_EVENT(DBF_WARNING, base, | |
3194 | "ESE error track %llu not within range %llu - %llu\n", | |
3195 | curr_trk, first_trk, last_trk); | |
3196 | return -EINVAL; | |
3197 | } | |
3198 | ||
3199 | /* | |
3200 | * if not the first track got the NRF error we have to skip over valid | |
3201 | * blocks | |
3202 | */ | |
3203 | if (curr_trk != first_trk) | |
3204 | skip_block = curr_trk * recs_per_trk - first_blk; | |
3205 | ||
3206 | /* we have no information beyond the current track */ | |
3207 | end_blk = (curr_trk + 1) * recs_per_trk; | |
5e2b17e7 JH |
3208 | |
3209 | rq_for_each_segment(bv, req, iter) { | |
3210 | dst = page_address(bv.bv_page) + bv.bv_offset; | |
3211 | for (off = 0; off < bv.bv_len; off += blksize) { | |
5e6bdd37 SH |
3212 | if (first_blk + blk_count >= end_blk) { |
3213 | cqr->proc_bytes = blk_count * blksize; | |
3214 | return 0; | |
3215 | } | |
3216 | if (dst && !skip_block) { | |
5e2b17e7 JH |
3217 | dst += off; |
3218 | memset(dst, 0, blksize); | |
5e6bdd37 SH |
3219 | } else { |
3220 | skip_block--; | |
5e2b17e7 | 3221 | } |
5e6bdd37 | 3222 | blk_count++; |
5e2b17e7 JH |
3223 | } |
3224 | } | |
5e6bdd37 | 3225 | return 0; |
5e2b17e7 JH |
3226 | } |
3227 | ||
8fd57520 JH |
3228 | /* |
3229 | * Helper function to count consecutive records of a single track. | |
3230 | */ | |
3231 | static int dasd_eckd_count_records(struct eckd_count *fmt_buffer, int start, | |
3232 | int max) | |
3233 | { | |
3234 | int head; | |
3235 | int i; | |
3236 | ||
3237 | head = fmt_buffer[start].head; | |
3238 | ||
3239 | /* | |
3240 | * There are 3 conditions where we stop counting: | |
3241 | * - if data reoccurs (same head and record may reoccur), which may | |
3242 | * happen due to the way DASD_ECKD_CCW_READ_COUNT works | |
3243 | * - when the head changes, because we're iterating over several tracks | |
3244 | * then (DASD_ECKD_CCW_READ_COUNT_MT) | |
3245 | * - when we've reached the end of sensible data in the buffer (the | |
3246 | * record will be 0 then) | |
3247 | */ | |
3248 | for (i = start; i < max; i++) { | |
3249 | if (i > start) { | |
3250 | if ((fmt_buffer[i].head == head && | |
3251 | fmt_buffer[i].record == 1) || | |
3252 | fmt_buffer[i].head != head || | |
3253 | fmt_buffer[i].record == 0) | |
3254 | break; | |
3255 | } | |
3256 | } | |
3257 | ||
3258 | return i - start; | |
3259 | } | |
3260 | ||
3261 | /* | |
3262 | * Evaluate a given range of tracks. Data like number of records, blocksize, | |
3263 | * record ids, and key length are compared with expected data. | |
3264 | * | |
3265 | * If a mismatch occurs, the corresponding error bit is set, as well as | |
3266 | * additional information, depending on the error. | |
3267 | */ | |
3268 | static void dasd_eckd_format_evaluate_tracks(struct eckd_count *fmt_buffer, | |
3269 | struct format_check_t *cdata, | |
3270 | int rpt_max, int rpt_exp, | |
3271 | int trk_per_cyl, int tpm) | |
3272 | { | |
3273 | struct ch_t geo; | |
3274 | int max_entries; | |
3275 | int count = 0; | |
3276 | int trkcount; | |
3277 | int blksize; | |
3278 | int pos = 0; | |
3279 | int i, j; | |
3280 | int kl; | |
3281 | ||
3282 | trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; | |
3283 | max_entries = trkcount * rpt_max; | |
3284 | ||
3285 | for (i = cdata->expect.start_unit; i <= cdata->expect.stop_unit; i++) { | |
3286 | /* Calculate the correct next starting position in the buffer */ | |
3287 | if (tpm) { | |
3288 | while (fmt_buffer[pos].record == 0 && | |
3289 | fmt_buffer[pos].dl == 0) { | |
3290 | if (pos++ > max_entries) | |
3291 | break; | |
3292 | } | |
3293 | } else { | |
3294 | if (i != cdata->expect.start_unit) | |
3295 | pos += rpt_max - count; | |
3296 | } | |
3297 | ||
3298 | /* Calculate the expected geo values for the current track */ | |
3299 | set_ch_t(&geo, i / trk_per_cyl, i % trk_per_cyl); | |
3300 | ||
3301 | /* Count and check number of records */ | |
3302 | count = dasd_eckd_count_records(fmt_buffer, pos, pos + rpt_max); | |
3303 | ||
3304 | if (count < rpt_exp) { | |
3305 | cdata->result = DASD_FMT_ERR_TOO_FEW_RECORDS; | |
3306 | break; | |
3307 | } | |
3308 | if (count > rpt_exp) { | |
3309 | cdata->result = DASD_FMT_ERR_TOO_MANY_RECORDS; | |
3310 | break; | |
3311 | } | |
3312 | ||
3313 | for (j = 0; j < count; j++, pos++) { | |
3314 | blksize = cdata->expect.blksize; | |
3315 | kl = 0; | |
3316 | ||
3317 | /* | |
3318 | * Set special values when checking CDL formatted | |
3319 | * devices. | |
3320 | */ | |
3321 | if ((cdata->expect.intensity & 0x08) && | |
3322 | geo.cyl == 0 && geo.head == 0) { | |
3323 | if (j < 3) { | |
3324 | blksize = sizes_trk0[j] - 4; | |
3325 | kl = 4; | |
3326 | } | |
3327 | } | |
3328 | if ((cdata->expect.intensity & 0x08) && | |
3329 | geo.cyl == 0 && geo.head == 1) { | |
3330 | blksize = LABEL_SIZE - 44; | |
3331 | kl = 44; | |
3332 | } | |
3333 | ||
3334 | /* Check blocksize */ | |
3335 | if (fmt_buffer[pos].dl != blksize) { | |
3336 | cdata->result = DASD_FMT_ERR_BLKSIZE; | |
3337 | goto out; | |
3338 | } | |
3339 | /* Check if key length is 0 */ | |
3340 | if (fmt_buffer[pos].kl != kl) { | |
3341 | cdata->result = DASD_FMT_ERR_KEY_LENGTH; | |
3342 | goto out; | |
3343 | } | |
3344 | /* Check if record_id is correct */ | |
3345 | if (fmt_buffer[pos].cyl != geo.cyl || | |
3346 | fmt_buffer[pos].head != geo.head || | |
3347 | fmt_buffer[pos].record != (j + 1)) { | |
3348 | cdata->result = DASD_FMT_ERR_RECORD_ID; | |
3349 | goto out; | |
3350 | } | |
3351 | } | |
3352 | } | |
3353 | ||
3354 | out: | |
3355 | /* | |
3356 | * In case of no errors, we need to decrease by one | |
3357 | * to get the correct positions. | |
3358 | */ | |
3359 | if (!cdata->result) { | |
3360 | i--; | |
3361 | pos--; | |
3362 | } | |
3363 | ||
3364 | cdata->unit = i; | |
3365 | cdata->num_records = count; | |
3366 | cdata->rec = fmt_buffer[pos].record; | |
3367 | cdata->blksize = fmt_buffer[pos].dl; | |
3368 | cdata->key_length = fmt_buffer[pos].kl; | |
3369 | } | |
3370 | ||
3371 | /* | |
3372 | * Check the format of a range of tracks of a DASD. | |
3373 | */ | |
3374 | static int dasd_eckd_check_device_format(struct dasd_device *base, | |
3375 | struct format_check_t *cdata, | |
3376 | int enable_pav) | |
3377 | { | |
3378 | struct dasd_eckd_private *private = base->private; | |
3379 | struct eckd_count *fmt_buffer; | |
3380 | struct irb irb; | |
3381 | int rpt_max, rpt_exp; | |
3382 | int fmt_buffer_size; | |
3383 | int trk_per_cyl; | |
3384 | int trkcount; | |
3385 | int tpm = 0; | |
3386 | int rc; | |
3387 | ||
3388 | trk_per_cyl = private->rdc_data.trk_per_cyl; | |
3389 | ||
3390 | /* Get maximum and expected amount of records per track */ | |
3391 | rpt_max = recs_per_track(&private->rdc_data, 0, 512) + 1; | |
3392 | rpt_exp = recs_per_track(&private->rdc_data, 0, cdata->expect.blksize); | |
3393 | ||
3394 | trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; | |
3395 | fmt_buffer_size = trkcount * rpt_max * sizeof(struct eckd_count); | |
3396 | ||
3397 | fmt_buffer = kzalloc(fmt_buffer_size, GFP_KERNEL | GFP_DMA); | |
3398 | if (!fmt_buffer) | |
3399 | return -ENOMEM; | |
3400 | ||
3401 | /* | |
3402 | * A certain FICON feature subset is needed to operate in transport | |
3403 | * mode. Additionally, the support for transport mode is implicitly | |
3404 | * checked by comparing the buffer size with fcx_max_data. As long as | |
3405 | * the buffer size is smaller we can operate in transport mode and | |
3406 | * process multiple tracks. If not, only one track at once is being | |
3407 | * processed using command mode. | |
3408 | */ | |
3409 | if ((private->features.feature[40] & 0x04) && | |
3410 | fmt_buffer_size <= private->fcx_max_data) | |
3411 | tpm = 1; | |
3412 | ||
3413 | rc = dasd_eckd_format_process_data(base, &cdata->expect, enable_pav, | |
3414 | tpm, fmt_buffer, rpt_max, &irb); | |
3415 | if (rc && rc != -EIO) | |
3416 | goto out; | |
3417 | if (rc == -EIO) { | |
3418 | /* | |
3419 | * If our first attempt with transport mode enabled comes back | |
3420 | * with an incorrect length error, we're going to retry the | |
3421 | * check with command mode. | |
3422 | */ | |
3423 | if (tpm && scsw_cstat(&irb.scsw) == 0x40) { | |
3424 | tpm = 0; | |
3425 | rc = dasd_eckd_format_process_data(base, &cdata->expect, | |
3426 | enable_pav, tpm, | |
3427 | fmt_buffer, rpt_max, | |
3428 | &irb); | |
3429 | if (rc) | |
3430 | goto out; | |
3431 | } else { | |
3432 | goto out; | |
3433 | } | |
3434 | } | |
3435 | ||
3436 | dasd_eckd_format_evaluate_tracks(fmt_buffer, cdata, rpt_max, rpt_exp, | |
3437 | trk_per_cyl, tpm); | |
3438 | ||
3439 | out: | |
3440 | kfree(fmt_buffer); | |
3441 | ||
3442 | return rc; | |
570d237c JH |
3443 | } |
3444 | ||
8e09f215 | 3445 | static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) |
1da177e4 | 3446 | { |
a2ace466 HR |
3447 | if (cqr->retries < 0) { |
3448 | cqr->status = DASD_CQR_FAILED; | |
3449 | return; | |
3450 | } | |
8e09f215 SW |
3451 | cqr->status = DASD_CQR_FILLED; |
3452 | if (cqr->block && (cqr->startdev != cqr->block->base)) { | |
3453 | dasd_eckd_reset_ccw_to_base_io(cqr); | |
3454 | cqr->startdev = cqr->block->base; | |
c9346151 | 3455 | cqr->lpm = dasd_path_get_opm(cqr->block->base); |
1da177e4 | 3456 | } |
8e09f215 | 3457 | }; |
1da177e4 LT |
3458 | |
3459 | static dasd_erp_fn_t | |
3460 | dasd_eckd_erp_action(struct dasd_ccw_req * cqr) | |
3461 | { | |
8e09f215 | 3462 | struct dasd_device *device = (struct dasd_device *) cqr->startdev; |
1da177e4 LT |
3463 | struct ccw_device *cdev = device->cdev; |
3464 | ||
3465 | switch (cdev->id.cu_type) { | |
3466 | case 0x3990: | |
3467 | case 0x2105: | |
3468 | case 0x2107: | |
3469 | case 0x1750: | |
3470 | return dasd_3990_erp_action; | |
3471 | case 0x9343: | |
3472 | case 0x3880: | |
3473 | default: | |
3474 | return dasd_default_erp_action; | |
3475 | } | |
3476 | } | |
3477 | ||
3478 | static dasd_erp_fn_t | |
3479 | dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) | |
3480 | { | |
3481 | return dasd_default_erp_postaction; | |
3482 | } | |
3483 | ||
5a27e60d SW |
3484 | static void dasd_eckd_check_for_device_change(struct dasd_device *device, |
3485 | struct dasd_ccw_req *cqr, | |
3486 | struct irb *irb) | |
8e09f215 SW |
3487 | { |
3488 | char mask; | |
f3eb5384 | 3489 | char *sense = NULL; |
543691a4 | 3490 | struct dasd_eckd_private *private = device->private; |
8e09f215 SW |
3491 | |
3492 | /* first of all check for state change pending interrupt */ | |
3493 | mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; | |
f3eb5384 | 3494 | if ((scsw_dstat(&irb->scsw) & mask) == mask) { |
c8d1c0ff SH |
3495 | /* |
3496 | * for alias only, not in offline processing | |
3497 | * and only if not suspended | |
3498 | */ | |
501183f2 | 3499 | if (!device->block && private->lcu && |
25e2cf1c | 3500 | device->state == DASD_STATE_ONLINE && |
c8d1c0ff SH |
3501 | !test_bit(DASD_FLAG_OFFLINE, &device->flags) && |
3502 | !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { | |
501183f2 SH |
3503 | /* schedule worker to reload device */ |
3504 | dasd_reload_device(device); | |
3505 | } | |
8e09f215 SW |
3506 | dasd_generic_handle_state_change(device); |
3507 | return; | |
3508 | } | |
3509 | ||
a5a0061f | 3510 | sense = dasd_get_sense(irb); |
5a27e60d SW |
3511 | if (!sense) |
3512 | return; | |
3513 | ||
3514 | /* summary unit check */ | |
c7a29e56 | 3515 | if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && |
a5a0061f | 3516 | (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { |
59a9ed5f SH |
3517 | if (test_and_set_bit(DASD_FLAG_SUC, &device->flags)) { |
3518 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", | |
3519 | "eckd suc: device already notified"); | |
3520 | return; | |
3521 | } | |
3522 | sense = dasd_get_sense(irb); | |
3523 | if (!sense) { | |
3524 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", | |
3525 | "eckd suc: no reason code available"); | |
3526 | clear_bit(DASD_FLAG_SUC, &device->flags); | |
3527 | return; | |
3528 | ||
3529 | } | |
3530 | private->suc_reason = sense[8]; | |
3531 | DBF_DEV_EVENT(DBF_NOTICE, device, "%s %x", | |
3532 | "eckd handle summary unit check: reason", | |
3533 | private->suc_reason); | |
3534 | dasd_get_device(device); | |
3535 | if (!schedule_work(&device->suc_work)) | |
3536 | dasd_put_device(device); | |
3537 | ||
8e09f215 SW |
3538 | return; |
3539 | } | |
3540 | ||
f60c768c | 3541 | /* service information message SIM */ |
5a27e60d | 3542 | if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && |
f3eb5384 SW |
3543 | ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { |
3544 | dasd_3990_erp_handle_sim(device, sense); | |
f60c768c SH |
3545 | return; |
3546 | } | |
3547 | ||
5a27e60d SW |
3548 | /* loss of device reservation is handled via base devices only |
3549 | * as alias devices may be used with several bases | |
3550 | */ | |
c7a29e56 SW |
3551 | if (device->block && (sense[27] & DASD_SENSE_BIT_0) && |
3552 | (sense[7] == 0x3F) && | |
5a27e60d SW |
3553 | (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && |
3554 | test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { | |
3555 | if (device->features & DASD_FEATURE_FAILONSLCK) | |
3556 | set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); | |
3557 | clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); | |
3558 | dev_err(&device->cdev->dev, | |
3559 | "The device reservation was lost\n"); | |
ada3df91 | 3560 | } |
5a27e60d | 3561 | } |
f3eb5384 | 3562 | |
91dc4a19 JH |
3563 | static int dasd_eckd_ras_sanity_checks(struct dasd_device *device, |
3564 | unsigned int first_trk, | |
3565 | unsigned int last_trk) | |
3566 | { | |
3567 | struct dasd_eckd_private *private = device->private; | |
3568 | unsigned int trks_per_vol; | |
3569 | int rc = 0; | |
3570 | ||
3571 | trks_per_vol = private->real_cyl * private->rdc_data.trk_per_cyl; | |
3572 | ||
3573 | if (first_trk >= trks_per_vol) { | |
3574 | dev_warn(&device->cdev->dev, | |
3575 | "Start track number %u used in the space release command is too big\n", | |
3576 | first_trk); | |
3577 | rc = -EINVAL; | |
3578 | } else if (last_trk >= trks_per_vol) { | |
3579 | dev_warn(&device->cdev->dev, | |
3580 | "Stop track number %u used in the space release command is too big\n", | |
3581 | last_trk); | |
3582 | rc = -EINVAL; | |
3583 | } else if (first_trk > last_trk) { | |
3584 | dev_warn(&device->cdev->dev, | |
3585 | "Start track %u used in the space release command exceeds the end track\n", | |
3586 | first_trk); | |
3587 | rc = -EINVAL; | |
3588 | } | |
3589 | return rc; | |
3590 | } | |
3591 | ||
3592 | /* | |
3593 | * Helper function to count the amount of involved extents within a given range | |
3594 | * with extent alignment in mind. | |
3595 | */ | |
3596 | static int count_exts(unsigned int from, unsigned int to, int trks_per_ext) | |
3597 | { | |
3598 | int cur_pos = 0; | |
3599 | int count = 0; | |
3600 | int tmp; | |
3601 | ||
3602 | if (from == to) | |
3603 | return 1; | |
3604 | ||
3605 | /* Count first partial extent */ | |
3606 | if (from % trks_per_ext != 0) { | |
3607 | tmp = from + trks_per_ext - (from % trks_per_ext) - 1; | |
3608 | if (tmp > to) | |
3609 | tmp = to; | |
3610 | cur_pos = tmp - from + 1; | |
3611 | count++; | |
3612 | } | |
3613 | /* Count full extents */ | |
3614 | if (to - (from + cur_pos) + 1 >= trks_per_ext) { | |
3615 | tmp = to - ((to - trks_per_ext + 1) % trks_per_ext); | |
3616 | count += (tmp - (from + cur_pos) + 1) / trks_per_ext; | |
3617 | cur_pos = tmp; | |
3618 | } | |
3619 | /* Count last partial extent */ | |
3620 | if (cur_pos < to) | |
3621 | count++; | |
3622 | ||
3623 | return count; | |
3624 | } | |
3625 | ||
3626 | /* | |
3627 | * Release allocated space for a given range or an entire volume. | |
3628 | */ | |
3629 | static struct dasd_ccw_req * | |
3630 | dasd_eckd_dso_ras(struct dasd_device *device, struct dasd_block *block, | |
3631 | struct request *req, unsigned int first_trk, | |
3632 | unsigned int last_trk, int by_extent) | |
3633 | { | |
3634 | struct dasd_eckd_private *private = device->private; | |
3635 | struct dasd_dso_ras_ext_range *ras_range; | |
3636 | struct dasd_rssd_features *features; | |
3637 | struct dasd_dso_ras_data *ras_data; | |
3638 | u16 heads, beg_head, end_head; | |
3639 | int cur_to_trk, cur_from_trk; | |
3640 | struct dasd_ccw_req *cqr; | |
3641 | u32 beg_cyl, end_cyl; | |
3642 | struct ccw1 *ccw; | |
3643 | int trks_per_ext; | |
3644 | size_t ras_size; | |
3645 | size_t size; | |
3646 | int nr_exts; | |
3647 | void *rq; | |
3648 | int i; | |
3649 | ||
3650 | if (dasd_eckd_ras_sanity_checks(device, first_trk, last_trk)) | |
3651 | return ERR_PTR(-EINVAL); | |
3652 | ||
3653 | rq = req ? blk_mq_rq_to_pdu(req) : NULL; | |
3654 | ||
3655 | features = &private->features; | |
3656 | ||
3657 | trks_per_ext = dasd_eckd_ext_size(device) * private->rdc_data.trk_per_cyl; | |
3658 | nr_exts = 0; | |
3659 | if (by_extent) | |
3660 | nr_exts = count_exts(first_trk, last_trk, trks_per_ext); | |
3661 | ras_size = sizeof(*ras_data); | |
3662 | size = ras_size + (nr_exts * sizeof(*ras_range)); | |
3663 | ||
3664 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, size, device, rq); | |
3665 | if (IS_ERR(cqr)) { | |
3666 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
3667 | "Could not allocate RAS request"); | |
3668 | return cqr; | |
3669 | } | |
3670 | ||
3671 | ras_data = cqr->data; | |
3672 | memset(ras_data, 0, size); | |
3673 | ||
3674 | ras_data->order = DSO_ORDER_RAS; | |
3675 | ras_data->flags.vol_type = 0; /* CKD volume */ | |
3676 | /* Release specified extents or entire volume */ | |
3677 | ras_data->op_flags.by_extent = by_extent; | |
3678 | /* | |
3679 | * This bit guarantees initialisation of tracks within an extent that is | |
3680 | * not fully specified, but is only supported with a certain feature | |
3681 | * subset. | |
3682 | */ | |
3683 | ras_data->op_flags.guarantee_init = !!(features->feature[56] & 0x01); | |
3684 | ras_data->lss = private->ned->ID; | |
3685 | ras_data->dev_addr = private->ned->unit_addr; | |
3686 | ras_data->nr_exts = nr_exts; | |
3687 | ||
3688 | if (by_extent) { | |
3689 | heads = private->rdc_data.trk_per_cyl; | |
3690 | cur_from_trk = first_trk; | |
3691 | cur_to_trk = first_trk + trks_per_ext - | |
3692 | (first_trk % trks_per_ext) - 1; | |
3693 | if (cur_to_trk > last_trk) | |
3694 | cur_to_trk = last_trk; | |
3695 | ras_range = (struct dasd_dso_ras_ext_range *)(cqr->data + ras_size); | |
3696 | ||
3697 | for (i = 0; i < nr_exts; i++) { | |
3698 | beg_cyl = cur_from_trk / heads; | |
3699 | beg_head = cur_from_trk % heads; | |
3700 | end_cyl = cur_to_trk / heads; | |
3701 | end_head = cur_to_trk % heads; | |
3702 | ||
3703 | set_ch_t(&ras_range->beg_ext, beg_cyl, beg_head); | |
3704 | set_ch_t(&ras_range->end_ext, end_cyl, end_head); | |
3705 | ||
3706 | cur_from_trk = cur_to_trk + 1; | |
3707 | cur_to_trk = cur_from_trk + trks_per_ext - 1; | |
3708 | if (cur_to_trk > last_trk) | |
3709 | cur_to_trk = last_trk; | |
3710 | ras_range++; | |
3711 | } | |
3712 | } | |
3713 | ||
3714 | ccw = cqr->cpaddr; | |
3715 | ccw->cda = (__u32)(addr_t)cqr->data; | |
3716 | ccw->cmd_code = DASD_ECKD_CCW_DSO; | |
3717 | ccw->count = size; | |
3718 | ||
3719 | cqr->startdev = device; | |
3720 | cqr->memdev = device; | |
3721 | cqr->block = block; | |
3722 | cqr->retries = 256; | |
3723 | cqr->expires = device->default_expires * HZ; | |
3724 | cqr->buildclk = get_tod_clock(); | |
3725 | cqr->status = DASD_CQR_FILLED; | |
3726 | ||
3727 | return cqr; | |
3728 | } | |
3729 | ||
3730 | static int dasd_eckd_release_space_full(struct dasd_device *device) | |
3731 | { | |
3732 | struct dasd_ccw_req *cqr; | |
3733 | int rc; | |
3734 | ||
3735 | cqr = dasd_eckd_dso_ras(device, NULL, NULL, 0, 0, 0); | |
3736 | if (IS_ERR(cqr)) | |
3737 | return PTR_ERR(cqr); | |
3738 | ||
3739 | rc = dasd_sleep_on_interruptible(cqr); | |
3740 | ||
3741 | dasd_sfree_request(cqr, cqr->memdev); | |
3742 | ||
3743 | return rc; | |
3744 | } | |
3745 | ||
3746 | static int dasd_eckd_release_space_trks(struct dasd_device *device, | |
3747 | unsigned int from, unsigned int to) | |
3748 | { | |
3749 | struct dasd_eckd_private *private = device->private; | |
3750 | struct dasd_block *block = device->block; | |
3751 | struct dasd_ccw_req *cqr, *n; | |
3752 | struct list_head ras_queue; | |
3753 | unsigned int device_exts; | |
3754 | int trks_per_ext; | |
3755 | int stop, step; | |
3756 | int cur_pos; | |
3757 | int rc = 0; | |
3758 | int retry; | |
3759 | ||
3760 | INIT_LIST_HEAD(&ras_queue); | |
3761 | ||
3762 | device_exts = private->real_cyl / dasd_eckd_ext_size(device); | |
3763 | trks_per_ext = dasd_eckd_ext_size(device) * private->rdc_data.trk_per_cyl; | |
3764 | ||
3765 | /* Make sure device limits are not exceeded */ | |
3766 | step = trks_per_ext * min(device_exts, DASD_ECKD_RAS_EXTS_MAX); | |
3767 | cur_pos = from; | |
3768 | ||
3769 | do { | |
3770 | retry = 0; | |
3771 | while (cur_pos < to) { | |
3772 | stop = cur_pos + step - | |
3773 | ((cur_pos + step) % trks_per_ext) - 1; | |
3774 | if (stop > to) | |
3775 | stop = to; | |
3776 | ||
3777 | cqr = dasd_eckd_dso_ras(device, NULL, NULL, cur_pos, stop, 1); | |
3778 | if (IS_ERR(cqr)) { | |
3779 | rc = PTR_ERR(cqr); | |
3780 | if (rc == -ENOMEM) { | |
3781 | if (list_empty(&ras_queue)) | |
3782 | goto out; | |
3783 | retry = 1; | |
3784 | break; | |
3785 | } | |
3786 | goto err_out; | |
3787 | } | |
3788 | ||
3789 | spin_lock_irq(&block->queue_lock); | |
3790 | list_add_tail(&cqr->blocklist, &ras_queue); | |
3791 | spin_unlock_irq(&block->queue_lock); | |
3792 | cur_pos = stop + 1; | |
3793 | } | |
3794 | ||
3795 | rc = dasd_sleep_on_queue_interruptible(&ras_queue); | |
3796 | ||
3797 | err_out: | |
3798 | list_for_each_entry_safe(cqr, n, &ras_queue, blocklist) { | |
3799 | device = cqr->startdev; | |
3800 | private = device->private; | |
3801 | ||
3802 | spin_lock_irq(&block->queue_lock); | |
3803 | list_del_init(&cqr->blocklist); | |
3804 | spin_unlock_irq(&block->queue_lock); | |
3805 | dasd_sfree_request(cqr, device); | |
3806 | private->count--; | |
3807 | } | |
3808 | } while (retry); | |
3809 | ||
3810 | out: | |
3811 | return rc; | |
3812 | } | |
3813 | ||
3814 | static int dasd_eckd_release_space(struct dasd_device *device, | |
3815 | struct format_data_t *rdata) | |
3816 | { | |
3817 | if (rdata->intensity & DASD_FMT_INT_ESE_FULL) | |
3818 | return dasd_eckd_release_space_full(device); | |
3819 | else if (rdata->intensity == 0) | |
3820 | return dasd_eckd_release_space_trks(device, rdata->start_unit, | |
3821 | rdata->stop_unit); | |
3822 | else | |
3823 | return -EINVAL; | |
3824 | } | |
3825 | ||
f3eb5384 SW |
3826 | static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( |
3827 | struct dasd_device *startdev, | |
8e09f215 | 3828 | struct dasd_block *block, |
f3eb5384 SW |
3829 | struct request *req, |
3830 | sector_t first_rec, | |
3831 | sector_t last_rec, | |
3832 | sector_t first_trk, | |
3833 | sector_t last_trk, | |
3834 | unsigned int first_offs, | |
3835 | unsigned int last_offs, | |
3836 | unsigned int blk_per_trk, | |
3837 | unsigned int blksize) | |
1da177e4 LT |
3838 | { |
3839 | struct dasd_eckd_private *private; | |
3840 | unsigned long *idaws; | |
3841 | struct LO_eckd_data *LO_data; | |
3842 | struct dasd_ccw_req *cqr; | |
3843 | struct ccw1 *ccw; | |
5705f702 | 3844 | struct req_iterator iter; |
7988613b | 3845 | struct bio_vec bv; |
1da177e4 | 3846 | char *dst; |
f3eb5384 | 3847 | unsigned int off; |
1da177e4 | 3848 | int count, cidaw, cplength, datasize; |
f3eb5384 | 3849 | sector_t recid; |
1da177e4 | 3850 | unsigned char cmd, rcmd; |
8e09f215 SW |
3851 | int use_prefix; |
3852 | struct dasd_device *basedev; | |
1da177e4 | 3853 | |
8e09f215 | 3854 | basedev = block->base; |
543691a4 | 3855 | private = basedev->private; |
1da177e4 LT |
3856 | if (rq_data_dir(req) == READ) |
3857 | cmd = DASD_ECKD_CCW_READ_MT; | |
3858 | else if (rq_data_dir(req) == WRITE) | |
3859 | cmd = DASD_ECKD_CCW_WRITE_MT; | |
3860 | else | |
3861 | return ERR_PTR(-EINVAL); | |
f3eb5384 | 3862 | |
1da177e4 LT |
3863 | /* Check struct bio and count the number of blocks for the request. */ |
3864 | count = 0; | |
3865 | cidaw = 0; | |
5705f702 | 3866 | rq_for_each_segment(bv, req, iter) { |
7988613b | 3867 | if (bv.bv_len & (blksize - 1)) |
6c92e699 JA |
3868 | /* Eckd can only do full blocks. */ |
3869 | return ERR_PTR(-EINVAL); | |
7988613b | 3870 | count += bv.bv_len >> (block->s2b_shift + 9); |
7988613b KO |
3871 | if (idal_is_needed (page_address(bv.bv_page), bv.bv_len)) |
3872 | cidaw += bv.bv_len >> (block->s2b_shift + 9); | |
1da177e4 LT |
3873 | } |
3874 | /* Paranoia. */ | |
3875 | if (count != last_rec - first_rec + 1) | |
3876 | return ERR_PTR(-EINVAL); | |
8e09f215 SW |
3877 | |
3878 | /* use the prefix command if available */ | |
3879 | use_prefix = private->features.feature[8] & 0x01; | |
3880 | if (use_prefix) { | |
3881 | /* 1x prefix + number of blocks */ | |
3882 | cplength = 2 + count; | |
3883 | /* 1x prefix + cidaws*sizeof(long) */ | |
3884 | datasize = sizeof(struct PFX_eckd_data) + | |
3885 | sizeof(struct LO_eckd_data) + | |
3886 | cidaw * sizeof(unsigned long); | |
3887 | } else { | |
3888 | /* 1x define extent + 1x locate record + number of blocks */ | |
3889 | cplength = 2 + count; | |
3890 | /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ | |
3891 | datasize = sizeof(struct DE_eckd_data) + | |
3892 | sizeof(struct LO_eckd_data) + | |
3893 | cidaw * sizeof(unsigned long); | |
3894 | } | |
1da177e4 LT |
3895 | /* Find out the number of additional locate record ccws for cdl. */ |
3896 | if (private->uses_cdl && first_rec < 2*blk_per_trk) { | |
3897 | if (last_rec >= 2*blk_per_trk) | |
3898 | count = 2*blk_per_trk - first_rec; | |
3899 | cplength += count; | |
3900 | datasize += count*sizeof(struct LO_eckd_data); | |
3901 | } | |
3902 | /* Allocate the ccw request. */ | |
68b781fe | 3903 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, |
c5205f2f | 3904 | startdev, blk_mq_rq_to_pdu(req)); |
1da177e4 LT |
3905 | if (IS_ERR(cqr)) |
3906 | return cqr; | |
3907 | ccw = cqr->cpaddr; | |
8e09f215 SW |
3908 | /* First ccw is define extent or prefix. */ |
3909 | if (use_prefix) { | |
3910 | if (prefix(ccw++, cqr->data, first_trk, | |
3911 | last_trk, cmd, basedev, startdev) == -EAGAIN) { | |
3912 | /* Clock not in sync and XRC is enabled. | |
3913 | * Try again later. | |
3914 | */ | |
3915 | dasd_sfree_request(cqr, startdev); | |
3916 | return ERR_PTR(-EAGAIN); | |
3917 | } | |
3918 | idaws = (unsigned long *) (cqr->data + | |
3919 | sizeof(struct PFX_eckd_data)); | |
3920 | } else { | |
3921 | if (define_extent(ccw++, cqr->data, first_trk, | |
45f186be | 3922 | last_trk, cmd, basedev, 0) == -EAGAIN) { |
8e09f215 SW |
3923 | /* Clock not in sync and XRC is enabled. |
3924 | * Try again later. | |
3925 | */ | |
3926 | dasd_sfree_request(cqr, startdev); | |
3927 | return ERR_PTR(-EAGAIN); | |
3928 | } | |
3929 | idaws = (unsigned long *) (cqr->data + | |
3930 | sizeof(struct DE_eckd_data)); | |
d54853ef | 3931 | } |
1da177e4 | 3932 | /* Build locate_record+read/write/ccws. */ |
1da177e4 LT |
3933 | LO_data = (struct LO_eckd_data *) (idaws + cidaw); |
3934 | recid = first_rec; | |
3935 | if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { | |
3936 | /* Only standard blocks so there is just one locate record. */ | |
3937 | ccw[-1].flags |= CCW_FLAG_CC; | |
3938 | locate_record(ccw++, LO_data++, first_trk, first_offs + 1, | |
8e09f215 | 3939 | last_rec - recid + 1, cmd, basedev, blksize); |
1da177e4 | 3940 | } |
5705f702 | 3941 | rq_for_each_segment(bv, req, iter) { |
7988613b | 3942 | dst = page_address(bv.bv_page) + bv.bv_offset; |
1da177e4 LT |
3943 | if (dasd_page_cache) { |
3944 | char *copy = kmem_cache_alloc(dasd_page_cache, | |
441e143e | 3945 | GFP_DMA | __GFP_NOWARN); |
1da177e4 | 3946 | if (copy && rq_data_dir(req) == WRITE) |
7988613b | 3947 | memcpy(copy + bv.bv_offset, dst, bv.bv_len); |
1da177e4 | 3948 | if (copy) |
7988613b | 3949 | dst = copy + bv.bv_offset; |
1da177e4 | 3950 | } |
7988613b | 3951 | for (off = 0; off < bv.bv_len; off += blksize) { |
1da177e4 LT |
3952 | sector_t trkid = recid; |
3953 | unsigned int recoffs = sector_div(trkid, blk_per_trk); | |
3954 | rcmd = cmd; | |
3955 | count = blksize; | |
3956 | /* Locate record for cdl special block ? */ | |
3957 | if (private->uses_cdl && recid < 2*blk_per_trk) { | |
3958 | if (dasd_eckd_cdl_special(blk_per_trk, recid)){ | |
3959 | rcmd |= 0x8; | |
3960 | count = dasd_eckd_cdl_reclen(recid); | |
ec5883ab HH |
3961 | if (count < blksize && |
3962 | rq_data_dir(req) == READ) | |
1da177e4 LT |
3963 | memset(dst + count, 0xe5, |
3964 | blksize - count); | |
3965 | } | |
3966 | ccw[-1].flags |= CCW_FLAG_CC; | |
3967 | locate_record(ccw++, LO_data++, | |
3968 | trkid, recoffs + 1, | |
8e09f215 | 3969 | 1, rcmd, basedev, count); |
1da177e4 LT |
3970 | } |
3971 | /* Locate record for standard blocks ? */ | |
3972 | if (private->uses_cdl && recid == 2*blk_per_trk) { | |
3973 | ccw[-1].flags |= CCW_FLAG_CC; | |
3974 | locate_record(ccw++, LO_data++, | |
3975 | trkid, recoffs + 1, | |
3976 | last_rec - recid + 1, | |
8e09f215 | 3977 | cmd, basedev, count); |
1da177e4 LT |
3978 | } |
3979 | /* Read/write ccw. */ | |
3980 | ccw[-1].flags |= CCW_FLAG_CC; | |
3981 | ccw->cmd_code = rcmd; | |
3982 | ccw->count = count; | |
3983 | if (idal_is_needed(dst, blksize)) { | |
3984 | ccw->cda = (__u32)(addr_t) idaws; | |
3985 | ccw->flags = CCW_FLAG_IDA; | |
3986 | idaws = idal_create_words(idaws, dst, blksize); | |
3987 | } else { | |
3988 | ccw->cda = (__u32)(addr_t) dst; | |
3989 | ccw->flags = 0; | |
3990 | } | |
3991 | ccw++; | |
3992 | dst += blksize; | |
3993 | recid++; | |
3994 | } | |
3995 | } | |
13de227b HS |
3996 | if (blk_noretry_request(req) || |
3997 | block->base->features & DASD_FEATURE_FAILFAST) | |
1c01b8a5 | 3998 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
8e09f215 SW |
3999 | cqr->startdev = startdev; |
4000 | cqr->memdev = startdev; | |
4001 | cqr->block = block; | |
7c8faa86 | 4002 | cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ |
c9346151 | 4003 | cqr->lpm = dasd_path_get_ppm(startdev); |
1f1ee9ad | 4004 | cqr->retries = startdev->default_retries; |
1aae0560 | 4005 | cqr->buildclk = get_tod_clock(); |
1da177e4 | 4006 | cqr->status = DASD_CQR_FILLED; |
5e2b17e7 JH |
4007 | |
4008 | /* Set flags to suppress output for expected errors */ | |
4009 | if (dasd_eckd_is_ese(basedev)) { | |
4010 | set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); | |
4011 | set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); | |
4012 | set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); | |
4013 | } | |
4014 | ||
1da177e4 LT |
4015 | return cqr; |
4016 | } | |
4017 | ||
f3eb5384 SW |
4018 | static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( |
4019 | struct dasd_device *startdev, | |
4020 | struct dasd_block *block, | |
4021 | struct request *req, | |
4022 | sector_t first_rec, | |
4023 | sector_t last_rec, | |
4024 | sector_t first_trk, | |
4025 | sector_t last_trk, | |
4026 | unsigned int first_offs, | |
4027 | unsigned int last_offs, | |
4028 | unsigned int blk_per_trk, | |
4029 | unsigned int blksize) | |
4030 | { | |
f3eb5384 SW |
4031 | unsigned long *idaws; |
4032 | struct dasd_ccw_req *cqr; | |
4033 | struct ccw1 *ccw; | |
4034 | struct req_iterator iter; | |
7988613b | 4035 | struct bio_vec bv; |
f3eb5384 SW |
4036 | char *dst, *idaw_dst; |
4037 | unsigned int cidaw, cplength, datasize; | |
4038 | unsigned int tlf; | |
4039 | sector_t recid; | |
4040 | unsigned char cmd; | |
4041 | struct dasd_device *basedev; | |
4042 | unsigned int trkcount, count, count_to_trk_end; | |
4043 | unsigned int idaw_len, seg_len, part_len, len_to_track_end; | |
4044 | unsigned char new_track, end_idaw; | |
4045 | sector_t trkid; | |
4046 | unsigned int recoffs; | |
4047 | ||
4048 | basedev = block->base; | |
f3eb5384 SW |
4049 | if (rq_data_dir(req) == READ) |
4050 | cmd = DASD_ECKD_CCW_READ_TRACK_DATA; | |
4051 | else if (rq_data_dir(req) == WRITE) | |
4052 | cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; | |
4053 | else | |
4054 | return ERR_PTR(-EINVAL); | |
4055 | ||
4056 | /* Track based I/O needs IDAWs for each page, and not just for | |
4057 | * 64 bit addresses. We need additional idals for pages | |
4058 | * that get filled from two tracks, so we use the number | |
4059 | * of records as upper limit. | |
4060 | */ | |
4061 | cidaw = last_rec - first_rec + 1; | |
4062 | trkcount = last_trk - first_trk + 1; | |
4063 | ||
4064 | /* 1x prefix + one read/write ccw per track */ | |
4065 | cplength = 1 + trkcount; | |
4066 | ||
7bf76f01 | 4067 | datasize = sizeof(struct PFX_eckd_data) + cidaw * sizeof(unsigned long); |
f3eb5384 SW |
4068 | |
4069 | /* Allocate the ccw request. */ | |
68b781fe | 4070 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, |
c5205f2f | 4071 | startdev, blk_mq_rq_to_pdu(req)); |
f3eb5384 SW |
4072 | if (IS_ERR(cqr)) |
4073 | return cqr; | |
4074 | ccw = cqr->cpaddr; | |
4075 | /* transfer length factor: how many bytes to read from the last track */ | |
4076 | if (first_trk == last_trk) | |
4077 | tlf = last_offs - first_offs + 1; | |
4078 | else | |
4079 | tlf = last_offs + 1; | |
4080 | tlf *= blksize; | |
4081 | ||
4082 | if (prefix_LRE(ccw++, cqr->data, first_trk, | |
4083 | last_trk, cmd, basedev, startdev, | |
4084 | 1 /* format */, first_offs + 1, | |
4085 | trkcount, blksize, | |
4086 | tlf) == -EAGAIN) { | |
4087 | /* Clock not in sync and XRC is enabled. | |
4088 | * Try again later. | |
4089 | */ | |
4090 | dasd_sfree_request(cqr, startdev); | |
4091 | return ERR_PTR(-EAGAIN); | |
4092 | } | |
4093 | ||
4094 | /* | |
4095 | * The translation of request into ccw programs must meet the | |
4096 | * following conditions: | |
4097 | * - all idaws but the first and the last must address full pages | |
4098 | * (or 2K blocks on 31-bit) | |
4099 | * - the scope of a ccw and it's idal ends with the track boundaries | |
4100 | */ | |
4101 | idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); | |
4102 | recid = first_rec; | |
4103 | new_track = 1; | |
4104 | end_idaw = 0; | |
4105 | len_to_track_end = 0; | |
246ccea1 | 4106 | idaw_dst = NULL; |
f3eb5384 SW |
4107 | idaw_len = 0; |
4108 | rq_for_each_segment(bv, req, iter) { | |
7988613b KO |
4109 | dst = page_address(bv.bv_page) + bv.bv_offset; |
4110 | seg_len = bv.bv_len; | |
f3eb5384 SW |
4111 | while (seg_len) { |
4112 | if (new_track) { | |
4113 | trkid = recid; | |
4114 | recoffs = sector_div(trkid, blk_per_trk); | |
4115 | count_to_trk_end = blk_per_trk - recoffs; | |
4116 | count = min((last_rec - recid + 1), | |
4117 | (sector_t)count_to_trk_end); | |
4118 | len_to_track_end = count * blksize; | |
4119 | ccw[-1].flags |= CCW_FLAG_CC; | |
4120 | ccw->cmd_code = cmd; | |
4121 | ccw->count = len_to_track_end; | |
4122 | ccw->cda = (__u32)(addr_t)idaws; | |
4123 | ccw->flags = CCW_FLAG_IDA; | |
4124 | ccw++; | |
4125 | recid += count; | |
4126 | new_track = 0; | |
52db45c3 SW |
4127 | /* first idaw for a ccw may start anywhere */ |
4128 | if (!idaw_dst) | |
4129 | idaw_dst = dst; | |
f3eb5384 | 4130 | } |
52db45c3 SW |
4131 | /* If we start a new idaw, we must make sure that it |
4132 | * starts on an IDA_BLOCK_SIZE boundary. | |
f3eb5384 SW |
4133 | * If we continue an idaw, we must make sure that the |
4134 | * current segment begins where the so far accumulated | |
4135 | * idaw ends | |
4136 | */ | |
52db45c3 SW |
4137 | if (!idaw_dst) { |
4138 | if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { | |
4139 | dasd_sfree_request(cqr, startdev); | |
4140 | return ERR_PTR(-ERANGE); | |
4141 | } else | |
4142 | idaw_dst = dst; | |
4143 | } | |
f3eb5384 SW |
4144 | if ((idaw_dst + idaw_len) != dst) { |
4145 | dasd_sfree_request(cqr, startdev); | |
4146 | return ERR_PTR(-ERANGE); | |
4147 | } | |
4148 | part_len = min(seg_len, len_to_track_end); | |
4149 | seg_len -= part_len; | |
4150 | dst += part_len; | |
4151 | idaw_len += part_len; | |
4152 | len_to_track_end -= part_len; | |
4153 | /* collected memory area ends on an IDA_BLOCK border, | |
4154 | * -> create an idaw | |
4155 | * idal_create_words will handle cases where idaw_len | |
4156 | * is larger then IDA_BLOCK_SIZE | |
4157 | */ | |
4158 | if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) | |
4159 | end_idaw = 1; | |
4160 | /* We also need to end the idaw at track end */ | |
4161 | if (!len_to_track_end) { | |
4162 | new_track = 1; | |
4163 | end_idaw = 1; | |
4164 | } | |
4165 | if (end_idaw) { | |
4166 | idaws = idal_create_words(idaws, idaw_dst, | |
4167 | idaw_len); | |
246ccea1 | 4168 | idaw_dst = NULL; |
f3eb5384 SW |
4169 | idaw_len = 0; |
4170 | end_idaw = 0; | |
4171 | } | |
4172 | } | |
4173 | } | |
4174 | ||
4175 | if (blk_noretry_request(req) || | |
4176 | block->base->features & DASD_FEATURE_FAILFAST) | |
4177 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); | |
4178 | cqr->startdev = startdev; | |
4179 | cqr->memdev = startdev; | |
4180 | cqr->block = block; | |
7c8faa86 | 4181 | cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ |
c9346151 | 4182 | cqr->lpm = dasd_path_get_ppm(startdev); |
1f1ee9ad | 4183 | cqr->retries = startdev->default_retries; |
1aae0560 | 4184 | cqr->buildclk = get_tod_clock(); |
f3eb5384 | 4185 | cqr->status = DASD_CQR_FILLED; |
5e2b17e7 JH |
4186 | |
4187 | /* Set flags to suppress output for expected errors */ | |
4188 | if (dasd_eckd_is_ese(basedev)) | |
4189 | set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); | |
4190 | ||
f3eb5384 SW |
4191 | return cqr; |
4192 | } | |
4193 | ||
4194 | static int prepare_itcw(struct itcw *itcw, | |
4195 | unsigned int trk, unsigned int totrk, int cmd, | |
4196 | struct dasd_device *basedev, | |
4197 | struct dasd_device *startdev, | |
4198 | unsigned int rec_on_trk, int count, | |
4199 | unsigned int blksize, | |
4200 | unsigned int total_data_size, | |
4201 | unsigned int tlf, | |
4202 | unsigned int blk_per_trk) | |
4203 | { | |
4204 | struct PFX_eckd_data pfxdata; | |
4205 | struct dasd_eckd_private *basepriv, *startpriv; | |
4206 | struct DE_eckd_data *dedata; | |
4207 | struct LRE_eckd_data *lredata; | |
4208 | struct dcw *dcw; | |
4209 | ||
4210 | u32 begcyl, endcyl; | |
4211 | u16 heads, beghead, endhead; | |
4212 | u8 pfx_cmd; | |
4213 | ||
4214 | int rc = 0; | |
4215 | int sector = 0; | |
4216 | int dn, d; | |
4217 | ||
4218 | ||
4219 | /* setup prefix data */ | |
543691a4 SO |
4220 | basepriv = basedev->private; |
4221 | startpriv = startdev->private; | |
f3eb5384 SW |
4222 | dedata = &pfxdata.define_extent; |
4223 | lredata = &pfxdata.locate_record; | |
4224 | ||
4225 | memset(&pfxdata, 0, sizeof(pfxdata)); | |
4226 | pfxdata.format = 1; /* PFX with LRE */ | |
4227 | pfxdata.base_address = basepriv->ned->unit_addr; | |
4228 | pfxdata.base_lss = basepriv->ned->ID; | |
4229 | pfxdata.validity.define_extent = 1; | |
4230 | ||
4231 | /* private uid is kept up to date, conf_data may be outdated */ | |
da340f92 SH |
4232 | if (startpriv->uid.type == UA_BASE_PAV_ALIAS) |
4233 | pfxdata.validity.verify_base = 1; | |
4234 | ||
4235 | if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) { | |
f3eb5384 | 4236 | pfxdata.validity.verify_base = 1; |
da340f92 | 4237 | pfxdata.validity.hyper_pav = 1; |
f3eb5384 SW |
4238 | } |
4239 | ||
4240 | switch (cmd) { | |
4241 | case DASD_ECKD_CCW_READ_TRACK_DATA: | |
4242 | dedata->mask.perm = 0x1; | |
4243 | dedata->attributes.operation = basepriv->attrib.operation; | |
4244 | dedata->blk_size = blksize; | |
4245 | dedata->ga_extended |= 0x42; | |
4246 | lredata->operation.orientation = 0x0; | |
4247 | lredata->operation.operation = 0x0C; | |
4248 | lredata->auxiliary.check_bytes = 0x01; | |
4249 | pfx_cmd = DASD_ECKD_CCW_PFX_READ; | |
4250 | break; | |
4251 | case DASD_ECKD_CCW_WRITE_TRACK_DATA: | |
4252 | dedata->mask.perm = 0x02; | |
4253 | dedata->attributes.operation = basepriv->attrib.operation; | |
4254 | dedata->blk_size = blksize; | |
5628683c | 4255 | rc = set_timestamp(NULL, dedata, basedev); |
f3eb5384 SW |
4256 | dedata->ga_extended |= 0x42; |
4257 | lredata->operation.orientation = 0x0; | |
4258 | lredata->operation.operation = 0x3F; | |
4259 | lredata->extended_operation = 0x23; | |
4260 | lredata->auxiliary.check_bytes = 0x2; | |
45f186be JH |
4261 | /* |
4262 | * If XRC is supported the System Time Stamp is set. The | |
4263 | * validity of the time stamp must be reflected in the prefix | |
4264 | * data as well. | |
4265 | */ | |
4266 | if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02) | |
4267 | pfxdata.validity.time_stamp = 1; /* 'Time Stamp Valid' */ | |
f3eb5384 SW |
4268 | pfx_cmd = DASD_ECKD_CCW_PFX; |
4269 | break; | |
8fd57520 JH |
4270 | case DASD_ECKD_CCW_READ_COUNT_MT: |
4271 | dedata->mask.perm = 0x1; | |
4272 | dedata->attributes.operation = DASD_BYPASS_CACHE; | |
4273 | dedata->ga_extended |= 0x42; | |
4274 | dedata->blk_size = blksize; | |
4275 | lredata->operation.orientation = 0x2; | |
4276 | lredata->operation.operation = 0x16; | |
4277 | lredata->auxiliary.check_bytes = 0x01; | |
4278 | pfx_cmd = DASD_ECKD_CCW_PFX_READ; | |
4279 | break; | |
f3eb5384 SW |
4280 | default: |
4281 | DBF_DEV_EVENT(DBF_ERR, basedev, | |
4282 | "prepare itcw, unknown opcode 0x%x", cmd); | |
4283 | BUG(); | |
4284 | break; | |
4285 | } | |
4286 | if (rc) | |
4287 | return rc; | |
4288 | ||
4289 | dedata->attributes.mode = 0x3; /* ECKD */ | |
4290 | ||
4291 | heads = basepriv->rdc_data.trk_per_cyl; | |
4292 | begcyl = trk / heads; | |
4293 | beghead = trk % heads; | |
4294 | endcyl = totrk / heads; | |
4295 | endhead = totrk % heads; | |
4296 | ||
4297 | /* check for sequential prestage - enhance cylinder range */ | |
4298 | if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || | |
4299 | dedata->attributes.operation == DASD_SEQ_ACCESS) { | |
4300 | ||
4301 | if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) | |
4302 | endcyl += basepriv->attrib.nr_cyl; | |
4303 | else | |
4304 | endcyl = (basepriv->real_cyl - 1); | |
4305 | } | |
4306 | ||
4307 | set_ch_t(&dedata->beg_ext, begcyl, beghead); | |
4308 | set_ch_t(&dedata->end_ext, endcyl, endhead); | |
4309 | ||
4310 | dedata->ep_format = 0x20; /* records per track is valid */ | |
4311 | dedata->ep_rec_per_track = blk_per_trk; | |
4312 | ||
4313 | if (rec_on_trk) { | |
4314 | switch (basepriv->rdc_data.dev_type) { | |
4315 | case 0x3390: | |
4316 | dn = ceil_quot(blksize + 6, 232); | |
4317 | d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); | |
4318 | sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; | |
4319 | break; | |
4320 | case 0x3380: | |
4321 | d = 7 + ceil_quot(blksize + 12, 32); | |
4322 | sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; | |
4323 | break; | |
4324 | } | |
4325 | } | |
4326 | ||
8fd57520 JH |
4327 | if (cmd == DASD_ECKD_CCW_READ_COUNT_MT) { |
4328 | lredata->auxiliary.length_valid = 0; | |
4329 | lredata->auxiliary.length_scope = 0; | |
4330 | lredata->sector = 0xff; | |
4331 | } else { | |
4332 | lredata->auxiliary.length_valid = 1; | |
4333 | lredata->auxiliary.length_scope = 1; | |
4334 | lredata->sector = sector; | |
4335 | } | |
f3eb5384 SW |
4336 | lredata->auxiliary.imbedded_ccw_valid = 1; |
4337 | lredata->length = tlf; | |
4338 | lredata->imbedded_ccw = cmd; | |
4339 | lredata->count = count; | |
f3eb5384 SW |
4340 | set_ch_t(&lredata->seek_addr, begcyl, beghead); |
4341 | lredata->search_arg.cyl = lredata->seek_addr.cyl; | |
4342 | lredata->search_arg.head = lredata->seek_addr.head; | |
4343 | lredata->search_arg.record = rec_on_trk; | |
4344 | ||
4345 | dcw = itcw_add_dcw(itcw, pfx_cmd, 0, | |
4346 | &pfxdata, sizeof(pfxdata), total_data_size); | |
757853ea | 4347 | return PTR_ERR_OR_ZERO(dcw); |
f3eb5384 SW |
4348 | } |
4349 | ||
4350 | static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( | |
4351 | struct dasd_device *startdev, | |
4352 | struct dasd_block *block, | |
4353 | struct request *req, | |
4354 | sector_t first_rec, | |
4355 | sector_t last_rec, | |
4356 | sector_t first_trk, | |
4357 | sector_t last_trk, | |
4358 | unsigned int first_offs, | |
4359 | unsigned int last_offs, | |
4360 | unsigned int blk_per_trk, | |
4361 | unsigned int blksize) | |
4362 | { | |
f3eb5384 SW |
4363 | struct dasd_ccw_req *cqr; |
4364 | struct req_iterator iter; | |
7988613b | 4365 | struct bio_vec bv; |
f3eb5384 SW |
4366 | char *dst; |
4367 | unsigned int trkcount, ctidaw; | |
4368 | unsigned char cmd; | |
4369 | struct dasd_device *basedev; | |
4370 | unsigned int tlf; | |
4371 | struct itcw *itcw; | |
4372 | struct tidaw *last_tidaw = NULL; | |
4373 | int itcw_op; | |
4374 | size_t itcw_size; | |
ef19298b SW |
4375 | u8 tidaw_flags; |
4376 | unsigned int seg_len, part_len, len_to_track_end; | |
4377 | unsigned char new_track; | |
4378 | sector_t recid, trkid; | |
4379 | unsigned int offs; | |
4380 | unsigned int count, count_to_trk_end; | |
cd10502b | 4381 | int ret; |
f3eb5384 SW |
4382 | |
4383 | basedev = block->base; | |
f3eb5384 SW |
4384 | if (rq_data_dir(req) == READ) { |
4385 | cmd = DASD_ECKD_CCW_READ_TRACK_DATA; | |
4386 | itcw_op = ITCW_OP_READ; | |
4387 | } else if (rq_data_dir(req) == WRITE) { | |
4388 | cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; | |
4389 | itcw_op = ITCW_OP_WRITE; | |
4390 | } else | |
4391 | return ERR_PTR(-EINVAL); | |
4392 | ||
4393 | /* trackbased I/O needs address all memory via TIDAWs, | |
4394 | * not just for 64 bit addresses. This allows us to map | |
4395 | * each segment directly to one tidaw. | |
ef19298b SW |
4396 | * In the case of write requests, additional tidaws may |
4397 | * be needed when a segment crosses a track boundary. | |
f3eb5384 SW |
4398 | */ |
4399 | trkcount = last_trk - first_trk + 1; | |
4400 | ctidaw = 0; | |
4401 | rq_for_each_segment(bv, req, iter) { | |
4402 | ++ctidaw; | |
4403 | } | |
ef19298b SW |
4404 | if (rq_data_dir(req) == WRITE) |
4405 | ctidaw += (last_trk - first_trk); | |
f3eb5384 SW |
4406 | |
4407 | /* Allocate the ccw request. */ | |
4408 | itcw_size = itcw_calc_size(0, ctidaw, 0); | |
c5205f2f SO |
4409 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev, |
4410 | blk_mq_rq_to_pdu(req)); | |
f3eb5384 SW |
4411 | if (IS_ERR(cqr)) |
4412 | return cqr; | |
4413 | ||
f3eb5384 SW |
4414 | /* transfer length factor: how many bytes to read from the last track */ |
4415 | if (first_trk == last_trk) | |
4416 | tlf = last_offs - first_offs + 1; | |
4417 | else | |
4418 | tlf = last_offs + 1; | |
4419 | tlf *= blksize; | |
4420 | ||
4421 | itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); | |
ef19298b | 4422 | if (IS_ERR(itcw)) { |
cd10502b JL |
4423 | ret = -EINVAL; |
4424 | goto out_error; | |
ef19298b | 4425 | } |
f3eb5384 | 4426 | cqr->cpaddr = itcw_get_tcw(itcw); |
f3eb5384 SW |
4427 | if (prepare_itcw(itcw, first_trk, last_trk, |
4428 | cmd, basedev, startdev, | |
4429 | first_offs + 1, | |
4430 | trkcount, blksize, | |
4431 | (last_rec - first_rec + 1) * blksize, | |
4432 | tlf, blk_per_trk) == -EAGAIN) { | |
4433 | /* Clock not in sync and XRC is enabled. | |
4434 | * Try again later. | |
4435 | */ | |
cd10502b JL |
4436 | ret = -EAGAIN; |
4437 | goto out_error; | |
f3eb5384 | 4438 | } |
d54cddb6 | 4439 | len_to_track_end = 0; |
f3eb5384 SW |
4440 | /* |
4441 | * A tidaw can address 4k of memory, but must not cross page boundaries | |
4442 | * We can let the block layer handle this by setting | |
4443 | * blk_queue_segment_boundary to page boundaries and | |
4444 | * blk_max_segment_size to page size when setting up the request queue. | |
ef19298b SW |
4445 | * For write requests, a TIDAW must not cross track boundaries, because |
4446 | * we have to set the CBC flag on the last tidaw for each track. | |
f3eb5384 | 4447 | */ |
ef19298b SW |
4448 | if (rq_data_dir(req) == WRITE) { |
4449 | new_track = 1; | |
4450 | recid = first_rec; | |
4451 | rq_for_each_segment(bv, req, iter) { | |
7988613b KO |
4452 | dst = page_address(bv.bv_page) + bv.bv_offset; |
4453 | seg_len = bv.bv_len; | |
ef19298b SW |
4454 | while (seg_len) { |
4455 | if (new_track) { | |
4456 | trkid = recid; | |
4457 | offs = sector_div(trkid, blk_per_trk); | |
4458 | count_to_trk_end = blk_per_trk - offs; | |
4459 | count = min((last_rec - recid + 1), | |
4460 | (sector_t)count_to_trk_end); | |
4461 | len_to_track_end = count * blksize; | |
4462 | recid += count; | |
4463 | new_track = 0; | |
4464 | } | |
4465 | part_len = min(seg_len, len_to_track_end); | |
4466 | seg_len -= part_len; | |
4467 | len_to_track_end -= part_len; | |
4468 | /* We need to end the tidaw at track end */ | |
4469 | if (!len_to_track_end) { | |
4470 | new_track = 1; | |
4471 | tidaw_flags = TIDAW_FLAGS_INSERT_CBC; | |
4472 | } else | |
4473 | tidaw_flags = 0; | |
4474 | last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, | |
4475 | dst, part_len); | |
cd10502b JL |
4476 | if (IS_ERR(last_tidaw)) { |
4477 | ret = -EINVAL; | |
4478 | goto out_error; | |
4479 | } | |
ef19298b SW |
4480 | dst += part_len; |
4481 | } | |
4482 | } | |
4483 | } else { | |
4484 | rq_for_each_segment(bv, req, iter) { | |
7988613b | 4485 | dst = page_address(bv.bv_page) + bv.bv_offset; |
ef19298b | 4486 | last_tidaw = itcw_add_tidaw(itcw, 0x00, |
7988613b | 4487 | dst, bv.bv_len); |
cd10502b JL |
4488 | if (IS_ERR(last_tidaw)) { |
4489 | ret = -EINVAL; | |
4490 | goto out_error; | |
4491 | } | |
ef19298b | 4492 | } |
f3eb5384 | 4493 | } |
ef19298b SW |
4494 | last_tidaw->flags |= TIDAW_FLAGS_LAST; |
4495 | last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; | |
f3eb5384 SW |
4496 | itcw_finalize(itcw); |
4497 | ||
4498 | if (blk_noretry_request(req) || | |
4499 | block->base->features & DASD_FEATURE_FAILFAST) | |
4500 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); | |
ef19298b | 4501 | cqr->cpmode = 1; |
f3eb5384 SW |
4502 | cqr->startdev = startdev; |
4503 | cqr->memdev = startdev; | |
4504 | cqr->block = block; | |
7c8faa86 | 4505 | cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ |
c9346151 | 4506 | cqr->lpm = dasd_path_get_ppm(startdev); |
1f1ee9ad | 4507 | cqr->retries = startdev->default_retries; |
1aae0560 | 4508 | cqr->buildclk = get_tod_clock(); |
f3eb5384 | 4509 | cqr->status = DASD_CQR_FILLED; |
5e2b17e7 JH |
4510 | |
4511 | /* Set flags to suppress output for expected errors */ | |
4512 | if (dasd_eckd_is_ese(basedev)) { | |
4513 | set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); | |
4514 | set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); | |
4515 | set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); | |
4516 | } | |
4517 | ||
f3eb5384 | 4518 | return cqr; |
cd10502b JL |
4519 | out_error: |
4520 | dasd_sfree_request(cqr, startdev); | |
4521 | return ERR_PTR(ret); | |
f3eb5384 SW |
4522 | } |
4523 | ||
4524 | static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, | |
4525 | struct dasd_block *block, | |
4526 | struct request *req) | |
4527 | { | |
ef19298b | 4528 | int cmdrtd, cmdwtd; |
f3eb5384 | 4529 | int use_prefix; |
ef19298b | 4530 | int fcx_multitrack; |
45b44d76 | 4531 | struct dasd_eckd_private *private; |
f3eb5384 SW |
4532 | struct dasd_device *basedev; |
4533 | sector_t first_rec, last_rec; | |
4534 | sector_t first_trk, last_trk; | |
4535 | unsigned int first_offs, last_offs; | |
4536 | unsigned int blk_per_trk, blksize; | |
4537 | int cdlspecial; | |
ef19298b | 4538 | unsigned int data_size; |
f3eb5384 SW |
4539 | struct dasd_ccw_req *cqr; |
4540 | ||
4541 | basedev = block->base; | |
543691a4 | 4542 | private = basedev->private; |
f3eb5384 SW |
4543 | |
4544 | /* Calculate number of blocks/records per track. */ | |
4545 | blksize = block->bp_block; | |
4546 | blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); | |
6fca97a9 SH |
4547 | if (blk_per_trk == 0) |
4548 | return ERR_PTR(-EINVAL); | |
f3eb5384 | 4549 | /* Calculate record id of first and last block. */ |
83096ebf | 4550 | first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; |
f3eb5384 SW |
4551 | first_offs = sector_div(first_trk, blk_per_trk); |
4552 | last_rec = last_trk = | |
83096ebf | 4553 | (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; |
f3eb5384 SW |
4554 | last_offs = sector_div(last_trk, blk_per_trk); |
4555 | cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); | |
4556 | ||
ef19298b SW |
4557 | fcx_multitrack = private->features.feature[40] & 0x20; |
4558 | data_size = blk_rq_bytes(req); | |
26a35f37 SW |
4559 | if (data_size % blksize) |
4560 | return ERR_PTR(-EINVAL); | |
ef19298b SW |
4561 | /* tpm write request add CBC data on each track boundary */ |
4562 | if (rq_data_dir(req) == WRITE) | |
4563 | data_size += (last_trk - first_trk) * 4; | |
f3eb5384 SW |
4564 | |
4565 | /* is read track data and write track data in command mode supported? */ | |
4566 | cmdrtd = private->features.feature[9] & 0x20; | |
4567 | cmdwtd = private->features.feature[12] & 0x40; | |
4568 | use_prefix = private->features.feature[8] & 0x01; | |
4569 | ||
4570 | cqr = NULL; | |
4571 | if (cdlspecial || dasd_page_cache) { | |
4572 | /* do nothing, just fall through to the cmd mode single case */ | |
ef19298b SW |
4573 | } else if ((data_size <= private->fcx_max_data) |
4574 | && (fcx_multitrack || (first_trk == last_trk))) { | |
f3eb5384 SW |
4575 | cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, |
4576 | first_rec, last_rec, | |
4577 | first_trk, last_trk, | |
4578 | first_offs, last_offs, | |
4579 | blk_per_trk, blksize); | |
ef19298b SW |
4580 | if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && |
4581 | (PTR_ERR(cqr) != -ENOMEM)) | |
f3eb5384 SW |
4582 | cqr = NULL; |
4583 | } else if (use_prefix && | |
4584 | (((rq_data_dir(req) == READ) && cmdrtd) || | |
4585 | ((rq_data_dir(req) == WRITE) && cmdwtd))) { | |
4586 | cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, | |
4587 | first_rec, last_rec, | |
4588 | first_trk, last_trk, | |
4589 | first_offs, last_offs, | |
4590 | blk_per_trk, blksize); | |
ef19298b SW |
4591 | if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && |
4592 | (PTR_ERR(cqr) != -ENOMEM)) | |
f3eb5384 SW |
4593 | cqr = NULL; |
4594 | } | |
4595 | if (!cqr) | |
4596 | cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, | |
4597 | first_rec, last_rec, | |
4598 | first_trk, last_trk, | |
4599 | first_offs, last_offs, | |
4600 | blk_per_trk, blksize); | |
4601 | return cqr; | |
4602 | } | |
4603 | ||
bbc7f7ea JH |
4604 | static struct dasd_ccw_req *dasd_eckd_build_cp_raw(struct dasd_device *startdev, |
4605 | struct dasd_block *block, | |
4606 | struct request *req) | |
e4dbb0f2 | 4607 | { |
9d2be0c1 JH |
4608 | sector_t start_padding_sectors, end_sector_offset, end_padding_sectors; |
4609 | unsigned int seg_len, len_to_track_end; | |
4610 | unsigned int cidaw, cplength, datasize; | |
4611 | sector_t first_trk, last_trk, sectors; | |
4612 | struct dasd_eckd_private *base_priv; | |
e4dbb0f2 | 4613 | struct dasd_device *basedev; |
e4dbb0f2 | 4614 | struct req_iterator iter; |
9d2be0c1 JH |
4615 | struct dasd_ccw_req *cqr; |
4616 | unsigned int first_offs; | |
4617 | unsigned int trkcount; | |
4618 | unsigned long *idaws; | |
4619 | unsigned int size; | |
4620 | unsigned char cmd; | |
7988613b | 4621 | struct bio_vec bv; |
9d2be0c1 JH |
4622 | struct ccw1 *ccw; |
4623 | int use_prefix; | |
4624 | void *data; | |
e4dbb0f2 | 4625 | char *dst; |
e4dbb0f2 SH |
4626 | |
4627 | /* | |
4628 | * raw track access needs to be mutiple of 64k and on 64k boundary | |
558b9ef0 SW |
4629 | * For read requests we can fix an incorrect alignment by padding |
4630 | * the request with dummy pages. | |
e4dbb0f2 | 4631 | */ |
558b9ef0 SW |
4632 | start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK; |
4633 | end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) % | |
4634 | DASD_RAW_SECTORS_PER_TRACK; | |
4635 | end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) % | |
4636 | DASD_RAW_SECTORS_PER_TRACK; | |
4637 | basedev = block->base; | |
4638 | if ((start_padding_sectors || end_padding_sectors) && | |
4639 | (rq_data_dir(req) == WRITE)) { | |
4640 | DBF_DEV_EVENT(DBF_ERR, basedev, | |
e78c21d1 | 4641 | "raw write not track aligned (%llu,%llu) req %p", |
558b9ef0 | 4642 | start_padding_sectors, end_padding_sectors, req); |
9d2be0c1 | 4643 | return ERR_PTR(-EINVAL); |
e4dbb0f2 SH |
4644 | } |
4645 | ||
4646 | first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; | |
4647 | last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / | |
4648 | DASD_RAW_SECTORS_PER_TRACK; | |
4649 | trkcount = last_trk - first_trk + 1; | |
4650 | first_offs = 0; | |
e4dbb0f2 SH |
4651 | |
4652 | if (rq_data_dir(req) == READ) | |
4653 | cmd = DASD_ECKD_CCW_READ_TRACK; | |
4654 | else if (rq_data_dir(req) == WRITE) | |
4655 | cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; | |
9d2be0c1 JH |
4656 | else |
4657 | return ERR_PTR(-EINVAL); | |
e4dbb0f2 SH |
4658 | |
4659 | /* | |
4660 | * Raw track based I/O needs IDAWs for each page, | |
4661 | * and not just for 64 bit addresses. | |
4662 | */ | |
4663 | cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; | |
4664 | ||
e4dbb0f2 | 4665 | /* |
9d2be0c1 JH |
4666 | * struct PFX_eckd_data and struct LRE_eckd_data can have up to 2 bytes |
4667 | * of extended parameter. This is needed for write full track. | |
e4dbb0f2 | 4668 | */ |
9d2be0c1 JH |
4669 | base_priv = basedev->private; |
4670 | use_prefix = base_priv->features.feature[8] & 0x01; | |
4671 | if (use_prefix) { | |
4672 | cplength = 1 + trkcount; | |
4673 | size = sizeof(struct PFX_eckd_data) + 2; | |
4674 | } else { | |
4675 | cplength = 2 + trkcount; | |
4676 | size = sizeof(struct DE_eckd_data) + | |
4677 | sizeof(struct LRE_eckd_data) + 2; | |
4678 | } | |
4679 | size = ALIGN(size, 8); | |
e4dbb0f2 | 4680 | |
7bf76f01 | 4681 | datasize = size + cidaw * sizeof(unsigned long); |
e4dbb0f2 SH |
4682 | |
4683 | /* Allocate the ccw request. */ | |
4684 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, | |
c5205f2f | 4685 | datasize, startdev, blk_mq_rq_to_pdu(req)); |
e4dbb0f2 | 4686 | if (IS_ERR(cqr)) |
9d2be0c1 JH |
4687 | return cqr; |
4688 | ||
e4dbb0f2 | 4689 | ccw = cqr->cpaddr; |
9d2be0c1 | 4690 | data = cqr->data; |
e4dbb0f2 | 4691 | |
9d2be0c1 JH |
4692 | if (use_prefix) { |
4693 | prefix_LRE(ccw++, data, first_trk, last_trk, cmd, basedev, | |
4694 | startdev, 1, first_offs + 1, trkcount, 0, 0); | |
4695 | } else { | |
4696 | define_extent(ccw++, data, first_trk, last_trk, cmd, basedev, 0); | |
4697 | ccw[-1].flags |= CCW_FLAG_CC; | |
4698 | ||
4699 | data += sizeof(struct DE_eckd_data); | |
4700 | locate_record_ext(ccw++, data, first_trk, first_offs + 1, | |
4701 | trkcount, cmd, basedev, 0, 0); | |
e4dbb0f2 SH |
4702 | } |
4703 | ||
9d2be0c1 | 4704 | idaws = (unsigned long *)(cqr->data + size); |
e4dbb0f2 | 4705 | len_to_track_end = 0; |
558b9ef0 SW |
4706 | if (start_padding_sectors) { |
4707 | ccw[-1].flags |= CCW_FLAG_CC; | |
4708 | ccw->cmd_code = cmd; | |
4709 | /* maximum 3390 track size */ | |
4710 | ccw->count = 57326; | |
4711 | /* 64k map to one track */ | |
4712 | len_to_track_end = 65536 - start_padding_sectors * 512; | |
4713 | ccw->cda = (__u32)(addr_t)idaws; | |
4714 | ccw->flags |= CCW_FLAG_IDA; | |
4715 | ccw->flags |= CCW_FLAG_SLI; | |
4716 | ccw++; | |
4717 | for (sectors = 0; sectors < start_padding_sectors; sectors += 8) | |
4718 | idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); | |
4719 | } | |
e4dbb0f2 | 4720 | rq_for_each_segment(bv, req, iter) { |
7988613b KO |
4721 | dst = page_address(bv.bv_page) + bv.bv_offset; |
4722 | seg_len = bv.bv_len; | |
558b9ef0 SW |
4723 | if (cmd == DASD_ECKD_CCW_READ_TRACK) |
4724 | memset(dst, 0, seg_len); | |
e4dbb0f2 SH |
4725 | if (!len_to_track_end) { |
4726 | ccw[-1].flags |= CCW_FLAG_CC; | |
4727 | ccw->cmd_code = cmd; | |
4728 | /* maximum 3390 track size */ | |
4729 | ccw->count = 57326; | |
4730 | /* 64k map to one track */ | |
4731 | len_to_track_end = 65536; | |
4732 | ccw->cda = (__u32)(addr_t)idaws; | |
4733 | ccw->flags |= CCW_FLAG_IDA; | |
4734 | ccw->flags |= CCW_FLAG_SLI; | |
4735 | ccw++; | |
4736 | } | |
4737 | len_to_track_end -= seg_len; | |
4738 | idaws = idal_create_words(idaws, dst, seg_len); | |
4739 | } | |
558b9ef0 SW |
4740 | for (sectors = 0; sectors < end_padding_sectors; sectors += 8) |
4741 | idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); | |
e4dbb0f2 SH |
4742 | if (blk_noretry_request(req) || |
4743 | block->base->features & DASD_FEATURE_FAILFAST) | |
4744 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); | |
4745 | cqr->startdev = startdev; | |
4746 | cqr->memdev = startdev; | |
4747 | cqr->block = block; | |
4748 | cqr->expires = startdev->default_expires * HZ; | |
c9346151 | 4749 | cqr->lpm = dasd_path_get_ppm(startdev); |
1f1ee9ad | 4750 | cqr->retries = startdev->default_retries; |
1aae0560 | 4751 | cqr->buildclk = get_tod_clock(); |
e4dbb0f2 SH |
4752 | cqr->status = DASD_CQR_FILLED; |
4753 | ||
e4dbb0f2 SH |
4754 | return cqr; |
4755 | } | |
4756 | ||
4757 | ||
1da177e4 LT |
4758 | static int |
4759 | dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) | |
4760 | { | |
4761 | struct dasd_eckd_private *private; | |
4762 | struct ccw1 *ccw; | |
5705f702 | 4763 | struct req_iterator iter; |
7988613b | 4764 | struct bio_vec bv; |
1da177e4 LT |
4765 | char *dst, *cda; |
4766 | unsigned int blksize, blk_per_trk, off; | |
4767 | sector_t recid; | |
5705f702 | 4768 | int status; |
1da177e4 LT |
4769 | |
4770 | if (!dasd_page_cache) | |
4771 | goto out; | |
543691a4 | 4772 | private = cqr->block->base->private; |
8e09f215 | 4773 | blksize = cqr->block->bp_block; |
1da177e4 | 4774 | blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); |
83096ebf | 4775 | recid = blk_rq_pos(req) >> cqr->block->s2b_shift; |
1da177e4 LT |
4776 | ccw = cqr->cpaddr; |
4777 | /* Skip over define extent & locate record. */ | |
4778 | ccw++; | |
4779 | if (private->uses_cdl == 0 || recid > 2*blk_per_trk) | |
4780 | ccw++; | |
5705f702 | 4781 | rq_for_each_segment(bv, req, iter) { |
7988613b KO |
4782 | dst = page_address(bv.bv_page) + bv.bv_offset; |
4783 | for (off = 0; off < bv.bv_len; off += blksize) { | |
1da177e4 LT |
4784 | /* Skip locate record. */ |
4785 | if (private->uses_cdl && recid <= 2*blk_per_trk) | |
4786 | ccw++; | |
4787 | if (dst) { | |
4788 | if (ccw->flags & CCW_FLAG_IDA) | |
4789 | cda = *((char **)((addr_t) ccw->cda)); | |
4790 | else | |
4791 | cda = (char *)((addr_t) ccw->cda); | |
4792 | if (dst != cda) { | |
4793 | if (rq_data_dir(req) == READ) | |
7988613b | 4794 | memcpy(dst, cda, bv.bv_len); |
1da177e4 LT |
4795 | kmem_cache_free(dasd_page_cache, |
4796 | (void *)((addr_t)cda & PAGE_MASK)); | |
4797 | } | |
4798 | dst = NULL; | |
4799 | } | |
4800 | ccw++; | |
4801 | recid++; | |
4802 | } | |
4803 | } | |
4804 | out: | |
4805 | status = cqr->status == DASD_CQR_DONE; | |
8e09f215 | 4806 | dasd_sfree_request(cqr, cqr->memdev); |
1da177e4 LT |
4807 | return status; |
4808 | } | |
4809 | ||
8e09f215 | 4810 | /* |
f3eb5384 | 4811 | * Modify ccw/tcw in cqr so it can be started on a base device. |
8e09f215 SW |
4812 | * |
4813 | * Note that this is not enough to restart the cqr! | |
4814 | * Either reset cqr->startdev as well (summary unit check handling) | |
4815 | * or restart via separate cqr (as in ERP handling). | |
4816 | */ | |
4817 | void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) | |
4818 | { | |
4819 | struct ccw1 *ccw; | |
4820 | struct PFX_eckd_data *pfxdata; | |
f3eb5384 SW |
4821 | struct tcw *tcw; |
4822 | struct tccb *tccb; | |
4823 | struct dcw *dcw; | |
4824 | ||
4825 | if (cqr->cpmode == 1) { | |
4826 | tcw = cqr->cpaddr; | |
4827 | tccb = tcw_get_tccb(tcw); | |
4828 | dcw = (struct dcw *)&tccb->tca[0]; | |
4829 | pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; | |
8e09f215 SW |
4830 | pfxdata->validity.verify_base = 0; |
4831 | pfxdata->validity.hyper_pav = 0; | |
f3eb5384 SW |
4832 | } else { |
4833 | ccw = cqr->cpaddr; | |
4834 | pfxdata = cqr->data; | |
4835 | if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { | |
4836 | pfxdata->validity.verify_base = 0; | |
4837 | pfxdata->validity.hyper_pav = 0; | |
4838 | } | |
8e09f215 SW |
4839 | } |
4840 | } | |
4841 | ||
4842 | #define DASD_ECKD_CHANQ_MAX_SIZE 4 | |
4843 | ||
4844 | static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, | |
4845 | struct dasd_block *block, | |
4846 | struct request *req) | |
4847 | { | |
4848 | struct dasd_eckd_private *private; | |
964ce509 | 4849 | struct dasd_device *startdev; |
7e64db15 | 4850 | unsigned long flags; |
964ce509 | 4851 | struct dasd_ccw_req *cqr; |
8e09f215 | 4852 | |
964ce509 | 4853 | startdev = dasd_alias_get_start_dev(base); |
8e09f215 SW |
4854 | if (!startdev) |
4855 | startdev = base; | |
543691a4 | 4856 | private = startdev->private; |
8e09f215 SW |
4857 | if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) |
4858 | return ERR_PTR(-EBUSY); | |
4859 | ||
4860 | spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); | |
4861 | private->count++; | |
e4dbb0f2 | 4862 | if ((base->features & DASD_FEATURE_USERAW)) |
bbc7f7ea | 4863 | cqr = dasd_eckd_build_cp_raw(startdev, block, req); |
e4dbb0f2 SH |
4864 | else |
4865 | cqr = dasd_eckd_build_cp(startdev, block, req); | |
8e09f215 SW |
4866 | if (IS_ERR(cqr)) |
4867 | private->count--; | |
4868 | spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); | |
4869 | return cqr; | |
4870 | } | |
4871 | ||
4872 | static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, | |
4873 | struct request *req) | |
4874 | { | |
4875 | struct dasd_eckd_private *private; | |
4876 | unsigned long flags; | |
4877 | ||
4878 | spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); | |
543691a4 | 4879 | private = cqr->memdev->private; |
8e09f215 SW |
4880 | private->count--; |
4881 | spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); | |
4882 | return dasd_eckd_free_cp(cqr, req); | |
4883 | } | |
4884 | ||
1da177e4 LT |
4885 | static int |
4886 | dasd_eckd_fill_info(struct dasd_device * device, | |
4887 | struct dasd_information2_t * info) | |
4888 | { | |
543691a4 | 4889 | struct dasd_eckd_private *private = device->private; |
1da177e4 | 4890 | |
1da177e4 LT |
4891 | info->label_block = 2; |
4892 | info->FBA_layout = private->uses_cdl ? 0 : 1; | |
4893 | info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; | |
543691a4 | 4894 | info->characteristics_size = sizeof(private->rdc_data); |
1da177e4 | 4895 | memcpy(info->characteristics, &private->rdc_data, |
543691a4 | 4896 | sizeof(private->rdc_data)); |
4abb08c2 SW |
4897 | info->confdata_size = min((unsigned long)private->conf_len, |
4898 | sizeof(info->configuration_data)); | |
4899 | memcpy(info->configuration_data, private->conf_data, | |
4900 | info->confdata_size); | |
1da177e4 LT |
4901 | return 0; |
4902 | } | |
4903 | ||
4904 | /* | |
4905 | * SECTION: ioctl functions for eckd devices. | |
4906 | */ | |
4907 | ||
4908 | /* | |
4909 | * Release device ioctl. | |
138c014d | 4910 | * Buils a channel programm to releases a prior reserved |
1da177e4 LT |
4911 | * (see dasd_eckd_reserve) device. |
4912 | */ | |
4913 | static int | |
1107ccfb | 4914 | dasd_eckd_release(struct dasd_device *device) |
1da177e4 | 4915 | { |
1da177e4 LT |
4916 | struct dasd_ccw_req *cqr; |
4917 | int rc; | |
f3eb5384 | 4918 | struct ccw1 *ccw; |
f932bcea | 4919 | int useglobal; |
1da177e4 LT |
4920 | |
4921 | if (!capable(CAP_SYS_ADMIN)) | |
4922 | return -EACCES; | |
4923 | ||
f932bcea | 4924 | useglobal = 0; |
c5205f2f | 4925 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); |
1da177e4 | 4926 | if (IS_ERR(cqr)) { |
f932bcea SW |
4927 | mutex_lock(&dasd_reserve_mutex); |
4928 | useglobal = 1; | |
4929 | cqr = &dasd_reserve_req->cqr; | |
4930 | memset(cqr, 0, sizeof(*cqr)); | |
4931 | memset(&dasd_reserve_req->ccw, 0, | |
4932 | sizeof(dasd_reserve_req->ccw)); | |
4933 | cqr->cpaddr = &dasd_reserve_req->ccw; | |
4934 | cqr->data = &dasd_reserve_req->data; | |
4935 | cqr->magic = DASD_ECKD_MAGIC; | |
1da177e4 | 4936 | } |
f3eb5384 SW |
4937 | ccw = cqr->cpaddr; |
4938 | ccw->cmd_code = DASD_ECKD_CCW_RELEASE; | |
4939 | ccw->flags |= CCW_FLAG_SLI; | |
4940 | ccw->count = 32; | |
4941 | ccw->cda = (__u32)(addr_t) cqr->data; | |
8e09f215 SW |
4942 | cqr->startdev = device; |
4943 | cqr->memdev = device; | |
1da177e4 | 4944 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
1c01b8a5 | 4945 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
336c340b | 4946 | cqr->retries = 2; /* set retry counter to enable basic ERP */ |
1da177e4 | 4947 | cqr->expires = 2 * HZ; |
1aae0560 | 4948 | cqr->buildclk = get_tod_clock(); |
1da177e4 LT |
4949 | cqr->status = DASD_CQR_FILLED; |
4950 | ||
4951 | rc = dasd_sleep_on_immediatly(cqr); | |
5a27e60d SW |
4952 | if (!rc) |
4953 | clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); | |
1da177e4 | 4954 | |
f932bcea SW |
4955 | if (useglobal) |
4956 | mutex_unlock(&dasd_reserve_mutex); | |
4957 | else | |
4958 | dasd_sfree_request(cqr, cqr->memdev); | |
1da177e4 LT |
4959 | return rc; |
4960 | } | |
4961 | ||
4962 | /* | |
4963 | * Reserve device ioctl. | |
4964 | * Options are set to 'synchronous wait for interrupt' and | |
138c014d HH |
4965 | * 'timeout the request'. This leads to a terminate IO if |
4966 | * the interrupt is outstanding for a certain time. | |
1da177e4 LT |
4967 | */ |
4968 | static int | |
1107ccfb | 4969 | dasd_eckd_reserve(struct dasd_device *device) |
1da177e4 | 4970 | { |
1da177e4 LT |
4971 | struct dasd_ccw_req *cqr; |
4972 | int rc; | |
f3eb5384 | 4973 | struct ccw1 *ccw; |
f932bcea | 4974 | int useglobal; |
1da177e4 LT |
4975 | |
4976 | if (!capable(CAP_SYS_ADMIN)) | |
4977 | return -EACCES; | |
4978 | ||
f932bcea | 4979 | useglobal = 0; |
c5205f2f | 4980 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); |
1da177e4 | 4981 | if (IS_ERR(cqr)) { |
f932bcea SW |
4982 | mutex_lock(&dasd_reserve_mutex); |
4983 | useglobal = 1; | |
4984 | cqr = &dasd_reserve_req->cqr; | |
4985 | memset(cqr, 0, sizeof(*cqr)); | |
4986 | memset(&dasd_reserve_req->ccw, 0, | |
4987 | sizeof(dasd_reserve_req->ccw)); | |
4988 | cqr->cpaddr = &dasd_reserve_req->ccw; | |
4989 | cqr->data = &dasd_reserve_req->data; | |
4990 | cqr->magic = DASD_ECKD_MAGIC; | |
1da177e4 | 4991 | } |
f3eb5384 SW |
4992 | ccw = cqr->cpaddr; |
4993 | ccw->cmd_code = DASD_ECKD_CCW_RESERVE; | |
4994 | ccw->flags |= CCW_FLAG_SLI; | |
4995 | ccw->count = 32; | |
4996 | ccw->cda = (__u32)(addr_t) cqr->data; | |
8e09f215 SW |
4997 | cqr->startdev = device; |
4998 | cqr->memdev = device; | |
1da177e4 | 4999 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
1c01b8a5 | 5000 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
336c340b | 5001 | cqr->retries = 2; /* set retry counter to enable basic ERP */ |
1da177e4 | 5002 | cqr->expires = 2 * HZ; |
1aae0560 | 5003 | cqr->buildclk = get_tod_clock(); |
1da177e4 LT |
5004 | cqr->status = DASD_CQR_FILLED; |
5005 | ||
5006 | rc = dasd_sleep_on_immediatly(cqr); | |
5a27e60d SW |
5007 | if (!rc) |
5008 | set_bit(DASD_FLAG_IS_RESERVED, &device->flags); | |
1da177e4 | 5009 | |
f932bcea SW |
5010 | if (useglobal) |
5011 | mutex_unlock(&dasd_reserve_mutex); | |
5012 | else | |
5013 | dasd_sfree_request(cqr, cqr->memdev); | |
1da177e4 LT |
5014 | return rc; |
5015 | } | |
5016 | ||
5017 | /* | |
5018 | * Steal lock ioctl - unconditional reserve device. | |
138c014d | 5019 | * Buils a channel programm to break a device's reservation. |
1da177e4 LT |
5020 | * (unconditional reserve) |
5021 | */ | |
5022 | static int | |
1107ccfb | 5023 | dasd_eckd_steal_lock(struct dasd_device *device) |
1da177e4 | 5024 | { |
1da177e4 LT |
5025 | struct dasd_ccw_req *cqr; |
5026 | int rc; | |
f3eb5384 | 5027 | struct ccw1 *ccw; |
f932bcea | 5028 | int useglobal; |
1da177e4 LT |
5029 | |
5030 | if (!capable(CAP_SYS_ADMIN)) | |
5031 | return -EACCES; | |
5032 | ||
f932bcea | 5033 | useglobal = 0; |
c5205f2f | 5034 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); |
1da177e4 | 5035 | if (IS_ERR(cqr)) { |
f932bcea SW |
5036 | mutex_lock(&dasd_reserve_mutex); |
5037 | useglobal = 1; | |
5038 | cqr = &dasd_reserve_req->cqr; | |
5039 | memset(cqr, 0, sizeof(*cqr)); | |
5040 | memset(&dasd_reserve_req->ccw, 0, | |
5041 | sizeof(dasd_reserve_req->ccw)); | |
5042 | cqr->cpaddr = &dasd_reserve_req->ccw; | |
5043 | cqr->data = &dasd_reserve_req->data; | |
5044 | cqr->magic = DASD_ECKD_MAGIC; | |
1da177e4 | 5045 | } |
f3eb5384 SW |
5046 | ccw = cqr->cpaddr; |
5047 | ccw->cmd_code = DASD_ECKD_CCW_SLCK; | |
5048 | ccw->flags |= CCW_FLAG_SLI; | |
5049 | ccw->count = 32; | |
5050 | ccw->cda = (__u32)(addr_t) cqr->data; | |
8e09f215 SW |
5051 | cqr->startdev = device; |
5052 | cqr->memdev = device; | |
1da177e4 | 5053 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
1c01b8a5 | 5054 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
336c340b | 5055 | cqr->retries = 2; /* set retry counter to enable basic ERP */ |
1da177e4 | 5056 | cqr->expires = 2 * HZ; |
1aae0560 | 5057 | cqr->buildclk = get_tod_clock(); |
1da177e4 LT |
5058 | cqr->status = DASD_CQR_FILLED; |
5059 | ||
5060 | rc = dasd_sleep_on_immediatly(cqr); | |
5a27e60d SW |
5061 | if (!rc) |
5062 | set_bit(DASD_FLAG_IS_RESERVED, &device->flags); | |
1da177e4 | 5063 | |
f932bcea SW |
5064 | if (useglobal) |
5065 | mutex_unlock(&dasd_reserve_mutex); | |
5066 | else | |
5067 | dasd_sfree_request(cqr, cqr->memdev); | |
1da177e4 LT |
5068 | return rc; |
5069 | } | |
5070 | ||
196339f1 SW |
5071 | /* |
5072 | * SNID - Sense Path Group ID | |
5073 | * This ioctl may be used in situations where I/O is stalled due to | |
5074 | * a reserve, so if the normal dasd_smalloc_request fails, we use the | |
5075 | * preallocated dasd_reserve_req. | |
5076 | */ | |
5077 | static int dasd_eckd_snid(struct dasd_device *device, | |
5078 | void __user *argp) | |
5079 | { | |
5080 | struct dasd_ccw_req *cqr; | |
5081 | int rc; | |
5082 | struct ccw1 *ccw; | |
5083 | int useglobal; | |
5084 | struct dasd_snid_ioctl_data usrparm; | |
5085 | ||
5086 | if (!capable(CAP_SYS_ADMIN)) | |
5087 | return -EACCES; | |
5088 | ||
5089 | if (copy_from_user(&usrparm, argp, sizeof(usrparm))) | |
5090 | return -EFAULT; | |
5091 | ||
5092 | useglobal = 0; | |
5093 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, | |
c5205f2f SO |
5094 | sizeof(struct dasd_snid_data), device, |
5095 | NULL); | |
196339f1 SW |
5096 | if (IS_ERR(cqr)) { |
5097 | mutex_lock(&dasd_reserve_mutex); | |
5098 | useglobal = 1; | |
5099 | cqr = &dasd_reserve_req->cqr; | |
5100 | memset(cqr, 0, sizeof(*cqr)); | |
5101 | memset(&dasd_reserve_req->ccw, 0, | |
5102 | sizeof(dasd_reserve_req->ccw)); | |
5103 | cqr->cpaddr = &dasd_reserve_req->ccw; | |
5104 | cqr->data = &dasd_reserve_req->data; | |
5105 | cqr->magic = DASD_ECKD_MAGIC; | |
5106 | } | |
5107 | ccw = cqr->cpaddr; | |
5108 | ccw->cmd_code = DASD_ECKD_CCW_SNID; | |
5109 | ccw->flags |= CCW_FLAG_SLI; | |
5110 | ccw->count = 12; | |
5111 | ccw->cda = (__u32)(addr_t) cqr->data; | |
5112 | cqr->startdev = device; | |
5113 | cqr->memdev = device; | |
5114 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); | |
5115 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); | |
5a27e60d | 5116 | set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); |
196339f1 SW |
5117 | cqr->retries = 5; |
5118 | cqr->expires = 10 * HZ; | |
1aae0560 | 5119 | cqr->buildclk = get_tod_clock(); |
196339f1 SW |
5120 | cqr->status = DASD_CQR_FILLED; |
5121 | cqr->lpm = usrparm.path_mask; | |
5122 | ||
5123 | rc = dasd_sleep_on_immediatly(cqr); | |
5124 | /* verify that I/O processing didn't modify the path mask */ | |
5125 | if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) | |
5126 | rc = -EIO; | |
5127 | if (!rc) { | |
5128 | usrparm.data = *((struct dasd_snid_data *)cqr->data); | |
5129 | if (copy_to_user(argp, &usrparm, sizeof(usrparm))) | |
5130 | rc = -EFAULT; | |
5131 | } | |
5132 | ||
5133 | if (useglobal) | |
5134 | mutex_unlock(&dasd_reserve_mutex); | |
5135 | else | |
5136 | dasd_sfree_request(cqr, cqr->memdev); | |
5137 | return rc; | |
5138 | } | |
5139 | ||
1da177e4 LT |
5140 | /* |
5141 | * Read performance statistics | |
5142 | */ | |
5143 | static int | |
1107ccfb | 5144 | dasd_eckd_performance(struct dasd_device *device, void __user *argp) |
1da177e4 | 5145 | { |
1da177e4 LT |
5146 | struct dasd_psf_prssd_data *prssdp; |
5147 | struct dasd_rssd_perf_stats_t *stats; | |
5148 | struct dasd_ccw_req *cqr; | |
5149 | struct ccw1 *ccw; | |
5150 | int rc; | |
5151 | ||
68b781fe | 5152 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, |
8e09f215 SW |
5153 | (sizeof(struct dasd_psf_prssd_data) + |
5154 | sizeof(struct dasd_rssd_perf_stats_t)), | |
c5205f2f | 5155 | device, NULL); |
1da177e4 | 5156 | if (IS_ERR(cqr)) { |
fc19f381 | 5157 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
1da177e4 LT |
5158 | "Could not allocate initialization request"); |
5159 | return PTR_ERR(cqr); | |
5160 | } | |
8e09f215 SW |
5161 | cqr->startdev = device; |
5162 | cqr->memdev = device; | |
1da177e4 | 5163 | cqr->retries = 0; |
eb6e199b | 5164 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
1da177e4 LT |
5165 | cqr->expires = 10 * HZ; |
5166 | ||
5167 | /* Prepare for Read Subsystem Data */ | |
5168 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
8e09f215 | 5169 | memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); |
1da177e4 | 5170 | prssdp->order = PSF_ORDER_PRSSD; |
5d67d164 | 5171 | prssdp->suborder = 0x01; /* Performance Statistics */ |
1da177e4 LT |
5172 | prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ |
5173 | ||
5174 | ccw = cqr->cpaddr; | |
5175 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
8e09f215 | 5176 | ccw->count = sizeof(struct dasd_psf_prssd_data); |
1da177e4 LT |
5177 | ccw->flags |= CCW_FLAG_CC; |
5178 | ccw->cda = (__u32)(addr_t) prssdp; | |
5179 | ||
5180 | /* Read Subsystem Data - Performance Statistics */ | |
5181 | stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); | |
8e09f215 | 5182 | memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); |
1da177e4 LT |
5183 | |
5184 | ccw++; | |
5185 | ccw->cmd_code = DASD_ECKD_CCW_RSSD; | |
8e09f215 | 5186 | ccw->count = sizeof(struct dasd_rssd_perf_stats_t); |
1da177e4 LT |
5187 | ccw->cda = (__u32)(addr_t) stats; |
5188 | ||
1aae0560 | 5189 | cqr->buildclk = get_tod_clock(); |
1da177e4 LT |
5190 | cqr->status = DASD_CQR_FILLED; |
5191 | rc = dasd_sleep_on(cqr); | |
5192 | if (rc == 0) { | |
1da177e4 LT |
5193 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; |
5194 | stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); | |
1107ccfb CH |
5195 | if (copy_to_user(argp, stats, |
5196 | sizeof(struct dasd_rssd_perf_stats_t))) | |
5197 | rc = -EFAULT; | |
1da177e4 | 5198 | } |
8e09f215 | 5199 | dasd_sfree_request(cqr, cqr->memdev); |
1da177e4 LT |
5200 | return rc; |
5201 | } | |
5202 | ||
5203 | /* | |
5204 | * Get attributes (cache operations) | |
5205 | * Returnes the cache attributes used in Define Extend (DE). | |
5206 | */ | |
5207 | static int | |
1107ccfb | 5208 | dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) |
1da177e4 | 5209 | { |
543691a4 | 5210 | struct dasd_eckd_private *private = device->private; |
1107ccfb | 5211 | struct attrib_data_t attrib = private->attrib; |
1da177e4 LT |
5212 | int rc; |
5213 | ||
5214 | if (!capable(CAP_SYS_ADMIN)) | |
5215 | return -EACCES; | |
1107ccfb | 5216 | if (!argp) |
1da177e4 LT |
5217 | return -EINVAL; |
5218 | ||
1107ccfb CH |
5219 | rc = 0; |
5220 | if (copy_to_user(argp, (long *) &attrib, | |
8e09f215 | 5221 | sizeof(struct attrib_data_t))) |
1107ccfb | 5222 | rc = -EFAULT; |
1da177e4 LT |
5223 | |
5224 | return rc; | |
5225 | } | |
5226 | ||
5227 | /* | |
5228 | * Set attributes (cache operations) | |
5229 | * Stores the attributes for cache operation to be used in Define Extend (DE). | |
5230 | */ | |
5231 | static int | |
1107ccfb | 5232 | dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) |
1da177e4 | 5233 | { |
543691a4 | 5234 | struct dasd_eckd_private *private = device->private; |
1da177e4 LT |
5235 | struct attrib_data_t attrib; |
5236 | ||
5237 | if (!capable(CAP_SYS_ADMIN)) | |
5238 | return -EACCES; | |
1107ccfb | 5239 | if (!argp) |
1da177e4 LT |
5240 | return -EINVAL; |
5241 | ||
1107ccfb | 5242 | if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) |
1da177e4 | 5243 | return -EFAULT; |
1da177e4 LT |
5244 | private->attrib = attrib; |
5245 | ||
fc19f381 SH |
5246 | dev_info(&device->cdev->dev, |
5247 | "The DASD cache mode was set to %x (%i cylinder prestage)\n", | |
5248 | private->attrib.operation, private->attrib.nr_cyl); | |
1da177e4 LT |
5249 | return 0; |
5250 | } | |
5251 | ||
ab1d848f NH |
5252 | /* |
5253 | * Issue syscall I/O to EMC Symmetrix array. | |
5254 | * CCWs are PSF and RSSD | |
5255 | */ | |
5256 | static int dasd_symm_io(struct dasd_device *device, void __user *argp) | |
5257 | { | |
5258 | struct dasd_symmio_parms usrparm; | |
5259 | char *psf_data, *rssd_result; | |
5260 | struct dasd_ccw_req *cqr; | |
5261 | struct ccw1 *ccw; | |
52898025 | 5262 | char psf0, psf1; |
ab1d848f NH |
5263 | int rc; |
5264 | ||
52898025 NH |
5265 | if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) |
5266 | return -EACCES; | |
5267 | psf0 = psf1 = 0; | |
5268 | ||
ab1d848f NH |
5269 | /* Copy parms from caller */ |
5270 | rc = -EFAULT; | |
5271 | if (copy_from_user(&usrparm, argp, sizeof(usrparm))) | |
5272 | goto out; | |
92d62891 | 5273 | if (is_compat_task()) { |
f8b06859 | 5274 | /* Make sure pointers are sane even on 31 bit. */ |
ab1d848f | 5275 | rc = -EINVAL; |
f8b06859 HC |
5276 | if ((usrparm.psf_data >> 32) != 0) |
5277 | goto out; | |
5278 | if ((usrparm.rssd_result >> 32) != 0) | |
5279 | goto out; | |
5280 | usrparm.psf_data &= 0x7fffffffULL; | |
5281 | usrparm.rssd_result &= 0x7fffffffULL; | |
ab1d848f | 5282 | } |
4a8ef699 SH |
5283 | /* at least 2 bytes are accessed and should be allocated */ |
5284 | if (usrparm.psf_data_len < 2) { | |
5285 | DBF_DEV_EVENT(DBF_WARNING, device, | |
5286 | "Symmetrix ioctl invalid data length %d", | |
5287 | usrparm.psf_data_len); | |
5288 | rc = -EINVAL; | |
5289 | goto out; | |
5290 | } | |
ab1d848f NH |
5291 | /* alloc I/O data area */ |
5292 | psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); | |
5293 | rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); | |
5294 | if (!psf_data || !rssd_result) { | |
5295 | rc = -ENOMEM; | |
5296 | goto out_free; | |
5297 | } | |
5298 | ||
5299 | /* get syscall header from user space */ | |
5300 | rc = -EFAULT; | |
5301 | if (copy_from_user(psf_data, | |
5302 | (void __user *)(unsigned long) usrparm.psf_data, | |
5303 | usrparm.psf_data_len)) | |
5304 | goto out_free; | |
52898025 NH |
5305 | psf0 = psf_data[0]; |
5306 | psf1 = psf_data[1]; | |
ab1d848f NH |
5307 | |
5308 | /* setup CCWs for PSF + RSSD */ | |
c5205f2f | 5309 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2, 0, device, NULL); |
ab1d848f | 5310 | if (IS_ERR(cqr)) { |
fc19f381 | 5311 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
ab1d848f NH |
5312 | "Could not allocate initialization request"); |
5313 | rc = PTR_ERR(cqr); | |
5314 | goto out_free; | |
5315 | } | |
5316 | ||
5317 | cqr->startdev = device; | |
5318 | cqr->memdev = device; | |
5319 | cqr->retries = 3; | |
5320 | cqr->expires = 10 * HZ; | |
1aae0560 | 5321 | cqr->buildclk = get_tod_clock(); |
ab1d848f NH |
5322 | cqr->status = DASD_CQR_FILLED; |
5323 | ||
5324 | /* Build the ccws */ | |
5325 | ccw = cqr->cpaddr; | |
5326 | ||
5327 | /* PSF ccw */ | |
5328 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
5329 | ccw->count = usrparm.psf_data_len; | |
5330 | ccw->flags |= CCW_FLAG_CC; | |
5331 | ccw->cda = (__u32)(addr_t) psf_data; | |
5332 | ||
5333 | ccw++; | |
5334 | ||
5335 | /* RSSD ccw */ | |
5336 | ccw->cmd_code = DASD_ECKD_CCW_RSSD; | |
5337 | ccw->count = usrparm.rssd_result_len; | |
5338 | ccw->flags = CCW_FLAG_SLI ; | |
5339 | ccw->cda = (__u32)(addr_t) rssd_result; | |
5340 | ||
5341 | rc = dasd_sleep_on(cqr); | |
5342 | if (rc) | |
5343 | goto out_sfree; | |
5344 | ||
5345 | rc = -EFAULT; | |
5346 | if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, | |
5347 | rssd_result, usrparm.rssd_result_len)) | |
5348 | goto out_sfree; | |
5349 | rc = 0; | |
5350 | ||
5351 | out_sfree: | |
5352 | dasd_sfree_request(cqr, cqr->memdev); | |
5353 | out_free: | |
5354 | kfree(rssd_result); | |
5355 | kfree(psf_data); | |
5356 | out: | |
52898025 NH |
5357 | DBF_DEV_EVENT(DBF_WARNING, device, |
5358 | "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", | |
5359 | (int) psf0, (int) psf1, rc); | |
ab1d848f NH |
5360 | return rc; |
5361 | } | |
5362 | ||
1107ccfb | 5363 | static int |
8e09f215 | 5364 | dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) |
1107ccfb | 5365 | { |
8e09f215 SW |
5366 | struct dasd_device *device = block->base; |
5367 | ||
1107ccfb CH |
5368 | switch (cmd) { |
5369 | case BIODASDGATTR: | |
5370 | return dasd_eckd_get_attrib(device, argp); | |
5371 | case BIODASDSATTR: | |
5372 | return dasd_eckd_set_attrib(device, argp); | |
5373 | case BIODASDPSRD: | |
5374 | return dasd_eckd_performance(device, argp); | |
5375 | case BIODASDRLSE: | |
5376 | return dasd_eckd_release(device); | |
5377 | case BIODASDRSRV: | |
5378 | return dasd_eckd_reserve(device); | |
5379 | case BIODASDSLCK: | |
5380 | return dasd_eckd_steal_lock(device); | |
196339f1 SW |
5381 | case BIODASDSNID: |
5382 | return dasd_eckd_snid(device, argp); | |
ab1d848f NH |
5383 | case BIODASDSYMMIO: |
5384 | return dasd_symm_io(device, argp); | |
1107ccfb | 5385 | default: |
6b79d14e | 5386 | return -ENOTTY; |
1107ccfb CH |
5387 | } |
5388 | } | |
5389 | ||
445b5b49 HH |
5390 | /* |
5391 | * Dump the range of CCWs into 'page' buffer | |
5392 | * and return number of printed chars. | |
5393 | */ | |
4d284cac | 5394 | static int |
445b5b49 HH |
5395 | dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) |
5396 | { | |
5397 | int len, count; | |
5398 | char *datap; | |
5399 | ||
5400 | len = 0; | |
5401 | while (from <= to) { | |
773bab4a | 5402 | len += sprintf(page + len, PRINTK_HEADER |
445b5b49 HH |
5403 | " CCW %p: %08X %08X DAT:", |
5404 | from, ((int *) from)[0], ((int *) from)[1]); | |
5405 | ||
5406 | /* get pointer to data (consider IDALs) */ | |
5407 | if (from->flags & CCW_FLAG_IDA) | |
5408 | datap = (char *) *((addr_t *) (addr_t) from->cda); | |
5409 | else | |
5410 | datap = (char *) ((addr_t) from->cda); | |
5411 | ||
5412 | /* dump data (max 32 bytes) */ | |
5413 | for (count = 0; count < from->count && count < 32; count++) { | |
5414 | if (count % 8 == 0) len += sprintf(page + len, " "); | |
5415 | if (count % 4 == 0) len += sprintf(page + len, " "); | |
5416 | len += sprintf(page + len, "%02x", datap[count]); | |
5417 | } | |
5418 | len += sprintf(page + len, "\n"); | |
5419 | from++; | |
5420 | } | |
5421 | return len; | |
5422 | } | |
5423 | ||
fc19f381 | 5424 | static void |
aeec92ca SH |
5425 | dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, |
5426 | char *reason) | |
fc19f381 SH |
5427 | { |
5428 | u64 *sense; | |
a5a0061f | 5429 | u64 *stat; |
aeec92ca SH |
5430 | |
5431 | sense = (u64 *) dasd_get_sense(irb); | |
a5a0061f | 5432 | stat = (u64 *) &irb->scsw; |
fc19f381 | 5433 | if (sense) { |
a5a0061f SW |
5434 | DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " |
5435 | "%016llx %016llx %016llx %016llx", | |
5436 | reason, *stat, *((u32 *) (stat + 1)), | |
ed3640b2 | 5437 | sense[0], sense[1], sense[2], sense[3]); |
fc19f381 | 5438 | } else { |
a5a0061f SW |
5439 | DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", |
5440 | reason, *stat, *((u32 *) (stat + 1)), | |
5441 | "NO VALID SENSE"); | |
fc19f381 SH |
5442 | } |
5443 | } | |
5444 | ||
1da177e4 LT |
5445 | /* |
5446 | * Print sense data and related channel program. | |
5447 | * Parts are printed because printk buffer is only 1024 bytes. | |
5448 | */ | |
f3eb5384 | 5449 | static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, |
8e09f215 | 5450 | struct dasd_ccw_req *req, struct irb *irb) |
1da177e4 LT |
5451 | { |
5452 | char *page; | |
445b5b49 HH |
5453 | struct ccw1 *first, *last, *fail, *from, *to; |
5454 | int len, sl, sct; | |
1da177e4 LT |
5455 | |
5456 | page = (char *) get_zeroed_page(GFP_ATOMIC); | |
5457 | if (page == NULL) { | |
fc19f381 SH |
5458 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
5459 | "No memory to dump sense data\n"); | |
1da177e4 LT |
5460 | return; |
5461 | } | |
445b5b49 | 5462 | /* dump the sense data */ |
773bab4a | 5463 | len = sprintf(page, PRINTK_HEADER |
1da177e4 | 5464 | " I/O status report for device %s:\n", |
2a0217d5 | 5465 | dev_name(&device->cdev->dev)); |
773bab4a | 5466 | len += sprintf(page + len, PRINTK_HEADER |
a5a0061f SW |
5467 | " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " |
5468 | "CS:%02X RC:%d\n", | |
5469 | req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), | |
5470 | scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), | |
5471 | scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), | |
5472 | req ? req->intrc : 0); | |
773bab4a | 5473 | len += sprintf(page + len, PRINTK_HEADER |
1da177e4 | 5474 | " device %s: Failing CCW: %p\n", |
2a0217d5 | 5475 | dev_name(&device->cdev->dev), |
23d805b6 | 5476 | (void *) (addr_t) irb->scsw.cmd.cpa); |
1da177e4 LT |
5477 | if (irb->esw.esw0.erw.cons) { |
5478 | for (sl = 0; sl < 4; sl++) { | |
773bab4a | 5479 | len += sprintf(page + len, PRINTK_HEADER |
1da177e4 LT |
5480 | " Sense(hex) %2d-%2d:", |
5481 | (8 * sl), ((8 * sl) + 7)); | |
5482 | ||
5483 | for (sct = 0; sct < 8; sct++) { | |
5484 | len += sprintf(page + len, " %02x", | |
5485 | irb->ecw[8 * sl + sct]); | |
5486 | } | |
5487 | len += sprintf(page + len, "\n"); | |
5488 | } | |
5489 | ||
5490 | if (irb->ecw[27] & DASD_SENSE_BIT_0) { | |
5491 | /* 24 Byte Sense Data */ | |
773bab4a | 5492 | sprintf(page + len, PRINTK_HEADER |
445b5b49 HH |
5493 | " 24 Byte: %x MSG %x, " |
5494 | "%s MSGb to SYSOP\n", | |
5495 | irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, | |
5496 | irb->ecw[1] & 0x10 ? "" : "no"); | |
1da177e4 LT |
5497 | } else { |
5498 | /* 32 Byte Sense Data */ | |
773bab4a | 5499 | sprintf(page + len, PRINTK_HEADER |
445b5b49 HH |
5500 | " 32 Byte: Format: %x " |
5501 | "Exception class %x\n", | |
5502 | irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); | |
1da177e4 LT |
5503 | } |
5504 | } else { | |
773bab4a | 5505 | sprintf(page + len, PRINTK_HEADER |
445b5b49 | 5506 | " SORRY - NO VALID SENSE AVAILABLE\n"); |
1da177e4 | 5507 | } |
773bab4a | 5508 | printk(KERN_ERR "%s", page); |
445b5b49 | 5509 | |
8e09f215 SW |
5510 | if (req) { |
5511 | /* req == NULL for unsolicited interrupts */ | |
5512 | /* dump the Channel Program (max 140 Bytes per line) */ | |
5513 | /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ | |
5514 | first = req->cpaddr; | |
5515 | for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); | |
5516 | to = min(first + 6, last); | |
773bab4a | 5517 | len = sprintf(page, PRINTK_HEADER |
8e09f215 SW |
5518 | " Related CP in req: %p\n", req); |
5519 | dasd_eckd_dump_ccw_range(first, to, page + len); | |
773bab4a | 5520 | printk(KERN_ERR "%s", page); |
1da177e4 | 5521 | |
8e09f215 SW |
5522 | /* print failing CCW area (maximum 4) */ |
5523 | /* scsw->cda is either valid or zero */ | |
5524 | len = 0; | |
5525 | from = ++to; | |
23d805b6 PO |
5526 | fail = (struct ccw1 *)(addr_t) |
5527 | irb->scsw.cmd.cpa; /* failing CCW */ | |
8e09f215 SW |
5528 | if (from < fail - 2) { |
5529 | from = fail - 2; /* there is a gap - print header */ | |
773bab4a | 5530 | len += sprintf(page, PRINTK_HEADER "......\n"); |
8e09f215 SW |
5531 | } |
5532 | to = min(fail + 1, last); | |
5533 | len += dasd_eckd_dump_ccw_range(from, to, page + len); | |
5534 | ||
5535 | /* print last CCWs (maximum 2) */ | |
5536 | from = max(from, ++to); | |
5537 | if (from < last - 1) { | |
5538 | from = last - 1; /* there is a gap - print header */ | |
773bab4a | 5539 | len += sprintf(page + len, PRINTK_HEADER "......\n"); |
8e09f215 SW |
5540 | } |
5541 | len += dasd_eckd_dump_ccw_range(from, last, page + len); | |
5542 | if (len > 0) | |
773bab4a | 5543 | printk(KERN_ERR "%s", page); |
1da177e4 | 5544 | } |
1da177e4 LT |
5545 | free_page((unsigned long) page); |
5546 | } | |
5547 | ||
f3eb5384 SW |
5548 | |
5549 | /* | |
5550 | * Print sense data from a tcw. | |
5551 | */ | |
5552 | static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, | |
5553 | struct dasd_ccw_req *req, struct irb *irb) | |
5554 | { | |
5555 | char *page; | |
5556 | int len, sl, sct, residual; | |
f3eb5384 | 5557 | struct tsb *tsb; |
ef19298b | 5558 | u8 *sense, *rcq; |
f3eb5384 SW |
5559 | |
5560 | page = (char *) get_zeroed_page(GFP_ATOMIC); | |
5561 | if (page == NULL) { | |
fc19f381 | 5562 | DBF_DEV_EVENT(DBF_WARNING, device, " %s", |
f3eb5384 SW |
5563 | "No memory to dump sense data"); |
5564 | return; | |
5565 | } | |
5566 | /* dump the sense data */ | |
773bab4a | 5567 | len = sprintf(page, PRINTK_HEADER |
f3eb5384 SW |
5568 | " I/O status report for device %s:\n", |
5569 | dev_name(&device->cdev->dev)); | |
773bab4a | 5570 | len += sprintf(page + len, PRINTK_HEADER |
a5a0061f SW |
5571 | " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " |
5572 | "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", | |
5573 | req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), | |
5574 | scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), | |
5575 | scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), | |
a521b048 SH |
5576 | irb->scsw.tm.fcxs, |
5577 | (irb->scsw.tm.ifob << 7) | irb->scsw.tm.sesq, | |
a5a0061f | 5578 | req ? req->intrc : 0); |
773bab4a | 5579 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
5580 | " device %s: Failing TCW: %p\n", |
5581 | dev_name(&device->cdev->dev), | |
5582 | (void *) (addr_t) irb->scsw.tm.tcw); | |
5583 | ||
5584 | tsb = NULL; | |
5585 | sense = NULL; | |
a5a0061f | 5586 | if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) |
f3eb5384 SW |
5587 | tsb = tcw_get_tsb( |
5588 | (struct tcw *)(unsigned long)irb->scsw.tm.tcw); | |
5589 | ||
b8fde722 | 5590 | if (tsb) { |
773bab4a | 5591 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 | 5592 | " tsb->length %d\n", tsb->length); |
773bab4a | 5593 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 | 5594 | " tsb->flags %x\n", tsb->flags); |
773bab4a | 5595 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 | 5596 | " tsb->dcw_offset %d\n", tsb->dcw_offset); |
773bab4a | 5597 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
5598 | " tsb->count %d\n", tsb->count); |
5599 | residual = tsb->count - 28; | |
773bab4a | 5600 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
5601 | " residual %d\n", residual); |
5602 | ||
5603 | switch (tsb->flags & 0x07) { | |
5604 | case 1: /* tsa_iostat */ | |
773bab4a | 5605 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
5606 | " tsb->tsa.iostat.dev_time %d\n", |
5607 | tsb->tsa.iostat.dev_time); | |
773bab4a | 5608 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
5609 | " tsb->tsa.iostat.def_time %d\n", |
5610 | tsb->tsa.iostat.def_time); | |
773bab4a | 5611 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
5612 | " tsb->tsa.iostat.queue_time %d\n", |
5613 | tsb->tsa.iostat.queue_time); | |
773bab4a | 5614 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
5615 | " tsb->tsa.iostat.dev_busy_time %d\n", |
5616 | tsb->tsa.iostat.dev_busy_time); | |
773bab4a | 5617 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
5618 | " tsb->tsa.iostat.dev_act_time %d\n", |
5619 | tsb->tsa.iostat.dev_act_time); | |
5620 | sense = tsb->tsa.iostat.sense; | |
5621 | break; | |
5622 | case 2: /* ts_ddpc */ | |
773bab4a | 5623 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 | 5624 | " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); |
ef19298b | 5625 | for (sl = 0; sl < 2; sl++) { |
773bab4a | 5626 | len += sprintf(page + len, PRINTK_HEADER |
ef19298b SW |
5627 | " tsb->tsa.ddpc.rcq %2d-%2d: ", |
5628 | (8 * sl), ((8 * sl) + 7)); | |
5629 | rcq = tsb->tsa.ddpc.rcq; | |
f3eb5384 SW |
5630 | for (sct = 0; sct < 8; sct++) { |
5631 | len += sprintf(page + len, " %02x", | |
ef19298b | 5632 | rcq[8 * sl + sct]); |
f3eb5384 SW |
5633 | } |
5634 | len += sprintf(page + len, "\n"); | |
5635 | } | |
5636 | sense = tsb->tsa.ddpc.sense; | |
5637 | break; | |
5638 | case 3: /* tsa_intrg */ | |
773bab4a | 5639 | len += sprintf(page + len, PRINTK_HEADER |
8693b914 | 5640 | " tsb->tsa.intrg.: not supported yet\n"); |
f3eb5384 SW |
5641 | break; |
5642 | } | |
5643 | ||
5644 | if (sense) { | |
5645 | for (sl = 0; sl < 4; sl++) { | |
773bab4a | 5646 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
5647 | " Sense(hex) %2d-%2d:", |
5648 | (8 * sl), ((8 * sl) + 7)); | |
5649 | for (sct = 0; sct < 8; sct++) { | |
5650 | len += sprintf(page + len, " %02x", | |
5651 | sense[8 * sl + sct]); | |
5652 | } | |
5653 | len += sprintf(page + len, "\n"); | |
5654 | } | |
5655 | ||
5656 | if (sense[27] & DASD_SENSE_BIT_0) { | |
5657 | /* 24 Byte Sense Data */ | |
773bab4a | 5658 | sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
5659 | " 24 Byte: %x MSG %x, " |
5660 | "%s MSGb to SYSOP\n", | |
5661 | sense[7] >> 4, sense[7] & 0x0f, | |
5662 | sense[1] & 0x10 ? "" : "no"); | |
5663 | } else { | |
5664 | /* 32 Byte Sense Data */ | |
773bab4a | 5665 | sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
5666 | " 32 Byte: Format: %x " |
5667 | "Exception class %x\n", | |
5668 | sense[6] & 0x0f, sense[22] >> 4); | |
5669 | } | |
5670 | } else { | |
773bab4a | 5671 | sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
5672 | " SORRY - NO VALID SENSE AVAILABLE\n"); |
5673 | } | |
5674 | } else { | |
773bab4a | 5675 | sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
5676 | " SORRY - NO TSB DATA AVAILABLE\n"); |
5677 | } | |
773bab4a | 5678 | printk(KERN_ERR "%s", page); |
f3eb5384 SW |
5679 | free_page((unsigned long) page); |
5680 | } | |
5681 | ||
5682 | static void dasd_eckd_dump_sense(struct dasd_device *device, | |
5683 | struct dasd_ccw_req *req, struct irb *irb) | |
5684 | { | |
8fd57520 JH |
5685 | u8 *sense = dasd_get_sense(irb); |
5686 | ||
5687 | if (scsw_is_tm(&irb->scsw)) { | |
5688 | /* | |
5689 | * In some cases the 'File Protected' or 'Incorrect Length' | |
5690 | * error might be expected and log messages shouldn't be written | |
5691 | * then. Check if the according suppress bit is set. | |
5692 | */ | |
5693 | if (sense && (sense[1] & SNS1_FILE_PROTECTED) && | |
5694 | test_bit(DASD_CQR_SUPPRESS_FP, &req->flags)) | |
5695 | return; | |
5696 | if (scsw_cstat(&irb->scsw) == 0x40 && | |
5697 | test_bit(DASD_CQR_SUPPRESS_IL, &req->flags)) | |
5698 | return; | |
5699 | ||
f3eb5384 | 5700 | dasd_eckd_dump_sense_tcw(device, req, irb); |
8fd57520 JH |
5701 | } else { |
5702 | /* | |
ab24fbd3 SH |
5703 | * In some cases the 'Command Reject' or 'No Record Found' |
5704 | * error might be expected and log messages shouldn't be | |
5705 | * written then. Check if the according suppress bit is set. | |
8fd57520 | 5706 | */ |
ab24fbd3 SH |
5707 | if (sense && sense[0] & SNS0_CMD_REJECT && |
5708 | test_bit(DASD_CQR_SUPPRESS_CR, &req->flags)) | |
5709 | return; | |
5710 | ||
8fd57520 JH |
5711 | if (sense && sense[1] & SNS1_NO_REC_FOUND && |
5712 | test_bit(DASD_CQR_SUPPRESS_NRF, &req->flags)) | |
5713 | return; | |
5714 | ||
f3eb5384 | 5715 | dasd_eckd_dump_sense_ccw(device, req, irb); |
8fd57520 | 5716 | } |
f3eb5384 SW |
5717 | } |
5718 | ||
501183f2 | 5719 | static int dasd_eckd_pm_freeze(struct dasd_device *device) |
d41dd122 SH |
5720 | { |
5721 | /* | |
5722 | * the device should be disconnected from our LCU structure | |
5723 | * on restore we will reconnect it and reread LCU specific | |
5724 | * information like PAV support that might have changed | |
5725 | */ | |
5726 | dasd_alias_remove_device(device); | |
5727 | dasd_alias_disconnect_device_from_lcu(device); | |
5728 | ||
5729 | return 0; | |
5730 | } | |
5731 | ||
501183f2 | 5732 | static int dasd_eckd_restore_device(struct dasd_device *device) |
d41dd122 | 5733 | { |
543691a4 | 5734 | struct dasd_eckd_private *private = device->private; |
6fca97a9 | 5735 | struct dasd_eckd_characteristics temp_rdc_data; |
f9f8d02f | 5736 | int rc; |
d41dd122 | 5737 | struct dasd_uid temp_uid; |
a7602f6c | 5738 | unsigned long flags; |
ea4da6ea | 5739 | unsigned long cqr_flags = 0; |
d41dd122 | 5740 | |
d41dd122 | 5741 | /* Read Configuration Data */ |
251afd69 SH |
5742 | rc = dasd_eckd_read_conf(device); |
5743 | if (rc) { | |
5744 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, | |
5745 | "Read configuration data failed, rc=%d", rc); | |
5746 | goto out_err; | |
5747 | } | |
d41dd122 | 5748 | |
2dedf0d9 SH |
5749 | dasd_eckd_get_uid(device, &temp_uid); |
5750 | /* Generate device unique id */ | |
5751 | rc = dasd_eckd_generate_uid(device); | |
5752 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); | |
d41dd122 | 5753 | if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) |
a7602f6c SH |
5754 | dev_err(&device->cdev->dev, "The UID of the DASD has " |
5755 | "changed\n"); | |
2dedf0d9 | 5756 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
d41dd122 SH |
5757 | if (rc) |
5758 | goto out_err; | |
d41dd122 SH |
5759 | |
5760 | /* register lcu with alias handling, enable PAV if this is a new lcu */ | |
f9f8d02f SH |
5761 | rc = dasd_alias_make_device_known_to_lcu(device); |
5762 | if (rc) | |
251afd69 | 5763 | goto out_err; |
ea4da6ea SH |
5764 | |
5765 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags); | |
5766 | dasd_eckd_validate_server(device, cqr_flags); | |
f4ac1d02 SW |
5767 | |
5768 | /* RE-Read Configuration Data */ | |
251afd69 SH |
5769 | rc = dasd_eckd_read_conf(device); |
5770 | if (rc) { | |
5771 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, | |
5772 | "Read configuration data failed, rc=%d", rc); | |
5773 | goto out_err2; | |
5774 | } | |
d41dd122 SH |
5775 | |
5776 | /* Read Feature Codes */ | |
68d1e5f0 | 5777 | dasd_eckd_read_features(device); |
d41dd122 | 5778 | |
c729696b | 5779 | /* Read Volume Information */ |
dd454839 | 5780 | dasd_eckd_read_vol_info(device); |
c729696b JH |
5781 | |
5782 | /* Read Extent Pool Information */ | |
dd454839 | 5783 | dasd_eckd_read_ext_pool_info(device); |
c729696b | 5784 | |
d41dd122 | 5785 | /* Read Device Characteristics */ |
68b781fe | 5786 | rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, |
6fca97a9 | 5787 | &temp_rdc_data, 64); |
d41dd122 | 5788 | if (rc) { |
b8ed5dd5 SH |
5789 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, |
5790 | "Read device characteristic failed, rc=%d", rc); | |
251afd69 | 5791 | goto out_err2; |
d41dd122 | 5792 | } |
a7602f6c | 5793 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); |
6fca97a9 | 5794 | memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); |
a7602f6c | 5795 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
d41dd122 SH |
5796 | |
5797 | /* add device to alias management */ | |
5798 | dasd_alias_add_device(device); | |
5799 | ||
5800 | return 0; | |
5801 | ||
251afd69 SH |
5802 | out_err2: |
5803 | dasd_alias_disconnect_device_from_lcu(device); | |
d41dd122 | 5804 | out_err: |
e6125fba | 5805 | return -1; |
d41dd122 SH |
5806 | } |
5807 | ||
501183f2 SH |
5808 | static int dasd_eckd_reload_device(struct dasd_device *device) |
5809 | { | |
543691a4 | 5810 | struct dasd_eckd_private *private = device->private; |
501183f2 | 5811 | int rc, old_base; |
2dedf0d9 SH |
5812 | char print_uid[60]; |
5813 | struct dasd_uid uid; | |
5814 | unsigned long flags; | |
501183f2 | 5815 | |
59a9ed5f SH |
5816 | /* |
5817 | * remove device from alias handling to prevent new requests | |
5818 | * from being scheduled on the wrong alias device | |
5819 | */ | |
5820 | dasd_alias_remove_device(device); | |
5821 | ||
2dedf0d9 | 5822 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); |
501183f2 | 5823 | old_base = private->uid.base_unit_addr; |
2dedf0d9 SH |
5824 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
5825 | ||
501183f2 SH |
5826 | /* Read Configuration Data */ |
5827 | rc = dasd_eckd_read_conf(device); | |
5828 | if (rc) | |
5829 | goto out_err; | |
5830 | ||
2dedf0d9 | 5831 | rc = dasd_eckd_generate_uid(device); |
501183f2 SH |
5832 | if (rc) |
5833 | goto out_err; | |
501183f2 SH |
5834 | /* |
5835 | * update unit address configuration and | |
5836 | * add device to alias management | |
5837 | */ | |
5838 | dasd_alias_update_add_device(device); | |
5839 | ||
2dedf0d9 SH |
5840 | dasd_eckd_get_uid(device, &uid); |
5841 | ||
5842 | if (old_base != uid.base_unit_addr) { | |
5843 | if (strlen(uid.vduit) > 0) | |
5844 | snprintf(print_uid, sizeof(print_uid), | |
5845 | "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, | |
5846 | uid.ssid, uid.base_unit_addr, uid.vduit); | |
501183f2 | 5847 | else |
2dedf0d9 SH |
5848 | snprintf(print_uid, sizeof(print_uid), |
5849 | "%s.%s.%04x.%02x", uid.vendor, uid.serial, | |
5850 | uid.ssid, uid.base_unit_addr); | |
501183f2 SH |
5851 | |
5852 | dev_info(&device->cdev->dev, | |
5853 | "An Alias device was reassigned to a new base device " | |
2dedf0d9 | 5854 | "with UID: %s\n", print_uid); |
501183f2 SH |
5855 | } |
5856 | return 0; | |
5857 | ||
5858 | out_err: | |
5859 | return -1; | |
5860 | } | |
5861 | ||
5db8440c SH |
5862 | static int dasd_eckd_read_message_buffer(struct dasd_device *device, |
5863 | struct dasd_rssd_messages *messages, | |
5864 | __u8 lpum) | |
5865 | { | |
5866 | struct dasd_rssd_messages *message_buf; | |
5867 | struct dasd_psf_prssd_data *prssdp; | |
5db8440c SH |
5868 | struct dasd_ccw_req *cqr; |
5869 | struct ccw1 *ccw; | |
5870 | int rc; | |
5871 | ||
5db8440c SH |
5872 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, |
5873 | (sizeof(struct dasd_psf_prssd_data) + | |
5874 | sizeof(struct dasd_rssd_messages)), | |
c5205f2f | 5875 | device, NULL); |
5db8440c SH |
5876 | if (IS_ERR(cqr)) { |
5877 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
5878 | "Could not allocate read message buffer request"); | |
5879 | return PTR_ERR(cqr); | |
5880 | } | |
5881 | ||
af775210 SH |
5882 | cqr->lpm = lpum; |
5883 | retry: | |
5db8440c SH |
5884 | cqr->startdev = device; |
5885 | cqr->memdev = device; | |
5886 | cqr->block = NULL; | |
5db8440c | 5887 | cqr->expires = 10 * HZ; |
5db8440c | 5888 | set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); |
b179b037 SH |
5889 | /* dasd_sleep_on_immediatly does not do complex error |
5890 | * recovery so clear erp flag and set retry counter to | |
5891 | * do basic erp */ | |
5892 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); | |
5893 | cqr->retries = 256; | |
5db8440c SH |
5894 | |
5895 | /* Prepare for Read Subsystem Data */ | |
5896 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
5897 | memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); | |
5898 | prssdp->order = PSF_ORDER_PRSSD; | |
5899 | prssdp->suborder = 0x03; /* Message Buffer */ | |
5900 | /* all other bytes of prssdp must be zero */ | |
5901 | ||
5902 | ccw = cqr->cpaddr; | |
5903 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
5904 | ccw->count = sizeof(struct dasd_psf_prssd_data); | |
5905 | ccw->flags |= CCW_FLAG_CC; | |
5906 | ccw->flags |= CCW_FLAG_SLI; | |
5907 | ccw->cda = (__u32)(addr_t) prssdp; | |
5908 | ||
5909 | /* Read Subsystem Data - message buffer */ | |
5910 | message_buf = (struct dasd_rssd_messages *) (prssdp + 1); | |
5911 | memset(message_buf, 0, sizeof(struct dasd_rssd_messages)); | |
5912 | ||
5913 | ccw++; | |
5914 | ccw->cmd_code = DASD_ECKD_CCW_RSSD; | |
5915 | ccw->count = sizeof(struct dasd_rssd_messages); | |
5916 | ccw->flags |= CCW_FLAG_SLI; | |
5917 | ccw->cda = (__u32)(addr_t) message_buf; | |
5918 | ||
5919 | cqr->buildclk = get_tod_clock(); | |
5920 | cqr->status = DASD_CQR_FILLED; | |
5921 | rc = dasd_sleep_on_immediatly(cqr); | |
5922 | if (rc == 0) { | |
5923 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
5924 | message_buf = (struct dasd_rssd_messages *) | |
5925 | (prssdp + 1); | |
5926 | memcpy(messages, message_buf, | |
5927 | sizeof(struct dasd_rssd_messages)); | |
af775210 SH |
5928 | } else if (cqr->lpm) { |
5929 | /* | |
5930 | * on z/VM we might not be able to do I/O on the requested path | |
5931 | * but instead we get the required information on any path | |
5932 | * so retry with open path mask | |
5933 | */ | |
5934 | cqr->lpm = 0; | |
5935 | goto retry; | |
5db8440c SH |
5936 | } else |
5937 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, | |
5938 | "Reading messages failed with rc=%d\n" | |
5939 | , rc); | |
5940 | dasd_sfree_request(cqr, cqr->memdev); | |
5941 | return rc; | |
5942 | } | |
5943 | ||
5a3b7b11 SH |
5944 | static int dasd_eckd_query_host_access(struct dasd_device *device, |
5945 | struct dasd_psf_query_host_access *data) | |
5946 | { | |
5947 | struct dasd_eckd_private *private = device->private; | |
5948 | struct dasd_psf_query_host_access *host_access; | |
5949 | struct dasd_psf_prssd_data *prssdp; | |
5950 | struct dasd_ccw_req *cqr; | |
5951 | struct ccw1 *ccw; | |
5952 | int rc; | |
5953 | ||
5954 | /* not available for HYPER PAV alias devices */ | |
5955 | if (!device->block && private->lcu->pav == HYPER_PAV) | |
5956 | return -EOPNOTSUPP; | |
5957 | ||
ccd53fa2 SH |
5958 | /* may not be supported by the storage server */ |
5959 | if (!(private->features.feature[14] & 0x80)) | |
5960 | return -EOPNOTSUPP; | |
5961 | ||
5a3b7b11 SH |
5962 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, |
5963 | sizeof(struct dasd_psf_prssd_data) + 1, | |
c5205f2f | 5964 | device, NULL); |
5a3b7b11 SH |
5965 | if (IS_ERR(cqr)) { |
5966 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
5967 | "Could not allocate read message buffer request"); | |
5968 | return PTR_ERR(cqr); | |
5969 | } | |
5970 | host_access = kzalloc(sizeof(*host_access), GFP_KERNEL | GFP_DMA); | |
5971 | if (!host_access) { | |
5972 | dasd_sfree_request(cqr, device); | |
5973 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
5974 | "Could not allocate host_access buffer"); | |
5975 | return -ENOMEM; | |
5976 | } | |
5977 | cqr->startdev = device; | |
5978 | cqr->memdev = device; | |
5979 | cqr->block = NULL; | |
5980 | cqr->retries = 256; | |
5981 | cqr->expires = 10 * HZ; | |
5982 | ||
5983 | /* Prepare for Read Subsystem Data */ | |
5984 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
5985 | memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); | |
5986 | prssdp->order = PSF_ORDER_PRSSD; | |
5987 | prssdp->suborder = PSF_SUBORDER_QHA; /* query host access */ | |
5988 | /* LSS and Volume that will be queried */ | |
5989 | prssdp->lss = private->ned->ID; | |
5990 | prssdp->volume = private->ned->unit_addr; | |
5991 | /* all other bytes of prssdp must be zero */ | |
5992 | ||
5993 | ccw = cqr->cpaddr; | |
5994 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
5995 | ccw->count = sizeof(struct dasd_psf_prssd_data); | |
5996 | ccw->flags |= CCW_FLAG_CC; | |
5997 | ccw->flags |= CCW_FLAG_SLI; | |
5998 | ccw->cda = (__u32)(addr_t) prssdp; | |
5999 | ||
6000 | /* Read Subsystem Data - query host access */ | |
6001 | ccw++; | |
6002 | ccw->cmd_code = DASD_ECKD_CCW_RSSD; | |
6003 | ccw->count = sizeof(struct dasd_psf_query_host_access); | |
6004 | ccw->flags |= CCW_FLAG_SLI; | |
6005 | ccw->cda = (__u32)(addr_t) host_access; | |
6006 | ||
6007 | cqr->buildclk = get_tod_clock(); | |
6008 | cqr->status = DASD_CQR_FILLED; | |
ab24fbd3 SH |
6009 | /* the command might not be supported, suppress error message */ |
6010 | __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); | |
f50af850 | 6011 | rc = dasd_sleep_on_interruptible(cqr); |
5a3b7b11 SH |
6012 | if (rc == 0) { |
6013 | *data = *host_access; | |
6014 | } else { | |
6015 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, | |
6016 | "Reading host access data failed with rc=%d\n", | |
6017 | rc); | |
6018 | rc = -EOPNOTSUPP; | |
6019 | } | |
6020 | ||
6021 | dasd_sfree_request(cqr, cqr->memdev); | |
6022 | kfree(host_access); | |
6023 | return rc; | |
6024 | } | |
6025 | /* | |
6026 | * return number of grouped devices | |
6027 | */ | |
6028 | static int dasd_eckd_host_access_count(struct dasd_device *device) | |
6029 | { | |
6030 | struct dasd_psf_query_host_access *access; | |
6031 | struct dasd_ckd_path_group_entry *entry; | |
6032 | struct dasd_ckd_host_information *info; | |
6033 | int count = 0; | |
6034 | int rc, i; | |
6035 | ||
6036 | access = kzalloc(sizeof(*access), GFP_NOIO); | |
6037 | if (!access) { | |
6038 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
6039 | "Could not allocate access buffer"); | |
6040 | return -ENOMEM; | |
6041 | } | |
6042 | rc = dasd_eckd_query_host_access(device, access); | |
6043 | if (rc) { | |
6044 | kfree(access); | |
6045 | return rc; | |
6046 | } | |
6047 | ||
6048 | info = (struct dasd_ckd_host_information *) | |
6049 | access->host_access_information; | |
6050 | for (i = 0; i < info->entry_count; i++) { | |
6051 | entry = (struct dasd_ckd_path_group_entry *) | |
6052 | (info->entry + i * info->entry_size); | |
6053 | if (entry->status_flags & DASD_ECKD_PG_GROUPED) | |
6054 | count++; | |
6055 | } | |
6056 | ||
6057 | kfree(access); | |
6058 | return count; | |
6059 | } | |
6060 | ||
6061 | /* | |
6062 | * write host access information to a sequential file | |
6063 | */ | |
6064 | static int dasd_hosts_print(struct dasd_device *device, struct seq_file *m) | |
6065 | { | |
6066 | struct dasd_psf_query_host_access *access; | |
6067 | struct dasd_ckd_path_group_entry *entry; | |
6068 | struct dasd_ckd_host_information *info; | |
6069 | char sysplex[9] = ""; | |
c7848e14 | 6070 | int rc, i; |
5a3b7b11 SH |
6071 | |
6072 | access = kzalloc(sizeof(*access), GFP_NOIO); | |
6073 | if (!access) { | |
6074 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
6075 | "Could not allocate access buffer"); | |
6076 | return -ENOMEM; | |
6077 | } | |
6078 | rc = dasd_eckd_query_host_access(device, access); | |
6079 | if (rc) { | |
6080 | kfree(access); | |
6081 | return rc; | |
6082 | } | |
6083 | ||
6084 | info = (struct dasd_ckd_host_information *) | |
6085 | access->host_access_information; | |
6086 | for (i = 0; i < info->entry_count; i++) { | |
6087 | entry = (struct dasd_ckd_path_group_entry *) | |
6088 | (info->entry + i * info->entry_size); | |
6089 | /* PGID */ | |
c7848e14 | 6090 | seq_printf(m, "pgid %*phN\n", 11, entry->pgid); |
5a3b7b11 SH |
6091 | /* FLAGS */ |
6092 | seq_printf(m, "status_flags %02x\n", entry->status_flags); | |
6093 | /* SYSPLEX NAME */ | |
6094 | memcpy(&sysplex, &entry->sysplex_name, sizeof(sysplex) - 1); | |
6095 | EBCASC(sysplex, sizeof(sysplex)); | |
6096 | seq_printf(m, "sysplex_name %8s\n", sysplex); | |
6097 | /* SUPPORTED CYLINDER */ | |
6098 | seq_printf(m, "supported_cylinder %d\n", entry->cylinder); | |
6099 | /* TIMESTAMP */ | |
6100 | seq_printf(m, "timestamp %lu\n", (unsigned long) | |
6101 | entry->timestamp); | |
6102 | } | |
6103 | kfree(access); | |
6104 | ||
6105 | return 0; | |
6106 | } | |
6107 | ||
5db8440c SH |
6108 | /* |
6109 | * Perform Subsystem Function - CUIR response | |
6110 | */ | |
6111 | static int | |
6112 | dasd_eckd_psf_cuir_response(struct dasd_device *device, int response, | |
a521b048 | 6113 | __u32 message_id, __u8 lpum) |
5db8440c SH |
6114 | { |
6115 | struct dasd_psf_cuir_response *psf_cuir; | |
a521b048 | 6116 | int pos = pathmask_to_pos(lpum); |
5db8440c SH |
6117 | struct dasd_ccw_req *cqr; |
6118 | struct ccw1 *ccw; | |
6119 | int rc; | |
6120 | ||
6121 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , | |
c5205f2f SO |
6122 | sizeof(struct dasd_psf_cuir_response), |
6123 | device, NULL); | |
5db8440c SH |
6124 | |
6125 | if (IS_ERR(cqr)) { | |
6126 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", | |
6127 | "Could not allocate PSF-CUIR request"); | |
6128 | return PTR_ERR(cqr); | |
6129 | } | |
6130 | ||
6131 | psf_cuir = (struct dasd_psf_cuir_response *)cqr->data; | |
6132 | psf_cuir->order = PSF_ORDER_CUIR_RESPONSE; | |
6133 | psf_cuir->cc = response; | |
a521b048 | 6134 | psf_cuir->chpid = device->path[pos].chpid; |
5db8440c | 6135 | psf_cuir->message_id = message_id; |
a521b048 SH |
6136 | psf_cuir->cssid = device->path[pos].cssid; |
6137 | psf_cuir->ssid = device->path[pos].ssid; | |
5db8440c SH |
6138 | ccw = cqr->cpaddr; |
6139 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
6140 | ccw->cda = (__u32)(addr_t)psf_cuir; | |
b179b037 | 6141 | ccw->flags = CCW_FLAG_SLI; |
5db8440c SH |
6142 | ccw->count = sizeof(struct dasd_psf_cuir_response); |
6143 | ||
6144 | cqr->startdev = device; | |
6145 | cqr->memdev = device; | |
6146 | cqr->block = NULL; | |
6147 | cqr->retries = 256; | |
6148 | cqr->expires = 10*HZ; | |
6149 | cqr->buildclk = get_tod_clock(); | |
6150 | cqr->status = DASD_CQR_FILLED; | |
b179b037 | 6151 | set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); |
5db8440c SH |
6152 | |
6153 | rc = dasd_sleep_on(cqr); | |
6154 | ||
6155 | dasd_sfree_request(cqr, cqr->memdev); | |
6156 | return rc; | |
6157 | } | |
6158 | ||
b179b037 SH |
6159 | /* |
6160 | * return configuration data that is referenced by record selector | |
6161 | * if a record selector is specified or per default return the | |
6162 | * conf_data pointer for the path specified by lpum | |
6163 | */ | |
6164 | static struct dasd_conf_data *dasd_eckd_get_ref_conf(struct dasd_device *device, | |
6165 | __u8 lpum, | |
6166 | struct dasd_cuir_message *cuir) | |
5db8440c | 6167 | { |
b179b037 SH |
6168 | struct dasd_conf_data *conf_data; |
6169 | int path, pos; | |
5db8440c | 6170 | |
b179b037 SH |
6171 | if (cuir->record_selector == 0) |
6172 | goto out; | |
6173 | for (path = 0x80, pos = 0; path; path >>= 1, pos++) { | |
c9346151 | 6174 | conf_data = device->path[pos].conf_data; |
b179b037 SH |
6175 | if (conf_data->gneq.record_selector == |
6176 | cuir->record_selector) | |
6177 | return conf_data; | |
5db8440c | 6178 | } |
b179b037 | 6179 | out: |
c9346151 | 6180 | return device->path[pathmask_to_pos(lpum)].conf_data; |
5db8440c SH |
6181 | } |
6182 | ||
6183 | /* | |
b179b037 SH |
6184 | * This function determines the scope of a reconfiguration request by |
6185 | * analysing the path and device selection data provided in the CUIR request. | |
6186 | * Returns a path mask containing CUIR affected paths for the give device. | |
6187 | * | |
6188 | * If the CUIR request does not contain the required information return the | |
6189 | * path mask of the path the attention message for the CUIR request was reveived | |
6190 | * on. | |
6191 | */ | |
6192 | static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum, | |
6193 | struct dasd_cuir_message *cuir) | |
6194 | { | |
6195 | struct dasd_conf_data *ref_conf_data; | |
6196 | unsigned long bitmask = 0, mask = 0; | |
b179b037 SH |
6197 | struct dasd_conf_data *conf_data; |
6198 | unsigned int pos, path; | |
6199 | char *ref_gneq, *gneq; | |
6200 | char *ref_ned, *ned; | |
6201 | int tbcpm = 0; | |
6202 | ||
6203 | /* if CUIR request does not specify the scope use the path | |
6204 | the attention message was presented on */ | |
6205 | if (!cuir->ned_map || | |
6206 | !(cuir->neq_map[0] | cuir->neq_map[1] | cuir->neq_map[2])) | |
6207 | return lpum; | |
6208 | ||
b179b037 SH |
6209 | /* get reference conf data */ |
6210 | ref_conf_data = dasd_eckd_get_ref_conf(device, lpum, cuir); | |
6211 | /* reference ned is determined by ned_map field */ | |
6212 | pos = 8 - ffs(cuir->ned_map); | |
6213 | ref_ned = (char *)&ref_conf_data->neds[pos]; | |
6214 | ref_gneq = (char *)&ref_conf_data->gneq; | |
6215 | /* transfer 24 bit neq_map to mask */ | |
6216 | mask = cuir->neq_map[2]; | |
6217 | mask |= cuir->neq_map[1] << 8; | |
6218 | mask |= cuir->neq_map[0] << 16; | |
6219 | ||
c9346151 | 6220 | for (path = 0; path < 8; path++) { |
b179b037 SH |
6221 | /* initialise data per path */ |
6222 | bitmask = mask; | |
c9346151 | 6223 | conf_data = device->path[path].conf_data; |
b179b037 SH |
6224 | pos = 8 - ffs(cuir->ned_map); |
6225 | ned = (char *) &conf_data->neds[pos]; | |
6226 | /* compare reference ned and per path ned */ | |
6227 | if (memcmp(ref_ned, ned, sizeof(*ned)) != 0) | |
6228 | continue; | |
6229 | gneq = (char *)&conf_data->gneq; | |
6230 | /* compare reference gneq and per_path gneq under | |
6231 | 24 bit mask where mask bit 0 equals byte 7 of | |
6232 | the gneq and mask bit 24 equals byte 31 */ | |
6233 | while (bitmask) { | |
6234 | pos = ffs(bitmask) - 1; | |
6235 | if (memcmp(&ref_gneq[31 - pos], &gneq[31 - pos], 1) | |
6236 | != 0) | |
6237 | break; | |
6238 | clear_bit(pos, &bitmask); | |
6239 | } | |
6240 | if (bitmask) | |
6241 | continue; | |
6242 | /* device and path match the reference values | |
6243 | add path to CUIR scope */ | |
c9346151 | 6244 | tbcpm |= 0x80 >> path; |
b179b037 SH |
6245 | } |
6246 | return tbcpm; | |
6247 | } | |
6248 | ||
6249 | static void dasd_eckd_cuir_notify_user(struct dasd_device *device, | |
a521b048 | 6250 | unsigned long paths, int action) |
b179b037 | 6251 | { |
b179b037 SH |
6252 | int pos; |
6253 | ||
6254 | while (paths) { | |
6255 | /* get position of bit in mask */ | |
a521b048 | 6256 | pos = 8 - ffs(paths); |
b179b037 | 6257 | /* get channel path descriptor from this position */ |
b179b037 | 6258 | if (action == CUIR_QUIESCE) |
a521b048 SH |
6259 | pr_warn("Service on the storage server caused path %x.%02x to go offline", |
6260 | device->path[pos].cssid, | |
6261 | device->path[pos].chpid); | |
b179b037 | 6262 | else if (action == CUIR_RESUME) |
a521b048 SH |
6263 | pr_info("Path %x.%02x is back online after service on the storage server", |
6264 | device->path[pos].cssid, | |
6265 | device->path[pos].chpid); | |
6266 | clear_bit(7 - pos, &paths); | |
b179b037 SH |
6267 | } |
6268 | } | |
6269 | ||
6270 | static int dasd_eckd_cuir_remove_path(struct dasd_device *device, __u8 lpum, | |
6271 | struct dasd_cuir_message *cuir) | |
6272 | { | |
6273 | unsigned long tbcpm; | |
6274 | ||
6275 | tbcpm = dasd_eckd_cuir_scope(device, lpum, cuir); | |
6276 | /* nothing to do if path is not in use */ | |
c9346151 | 6277 | if (!(dasd_path_get_opm(device) & tbcpm)) |
b179b037 | 6278 | return 0; |
c9346151 | 6279 | if (!(dasd_path_get_opm(device) & ~tbcpm)) { |
b179b037 SH |
6280 | /* no path would be left if the CUIR action is taken |
6281 | return error */ | |
6282 | return -EINVAL; | |
6283 | } | |
6284 | /* remove device from operational path mask */ | |
c9346151 SH |
6285 | dasd_path_remove_opm(device, tbcpm); |
6286 | dasd_path_add_cuirpm(device, tbcpm); | |
b179b037 SH |
6287 | return tbcpm; |
6288 | } | |
6289 | ||
6290 | /* | |
6291 | * walk through all devices and build a path mask to quiesce them | |
6292 | * return an error if the last path to a device would be removed | |
5db8440c SH |
6293 | * |
6294 | * if only part of the devices are quiesced and an error | |
6295 | * occurs no onlining necessary, the storage server will | |
6296 | * notify the already set offline devices again | |
6297 | */ | |
6298 | static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum, | |
b179b037 | 6299 | struct dasd_cuir_message *cuir) |
5db8440c | 6300 | { |
543691a4 | 6301 | struct dasd_eckd_private *private = device->private; |
5db8440c | 6302 | struct alias_pav_group *pavgroup, *tempgroup; |
5db8440c | 6303 | struct dasd_device *dev, *n; |
b179b037 SH |
6304 | unsigned long paths = 0; |
6305 | unsigned long flags; | |
6306 | int tbcpm; | |
5db8440c | 6307 | |
5db8440c | 6308 | /* active devices */ |
b179b037 | 6309 | list_for_each_entry_safe(dev, n, &private->lcu->active_devices, |
5db8440c | 6310 | alias_list) { |
b179b037 SH |
6311 | spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); |
6312 | tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); | |
6313 | spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); | |
6314 | if (tbcpm < 0) | |
6315 | goto out_err; | |
6316 | paths |= tbcpm; | |
5db8440c | 6317 | } |
5db8440c | 6318 | /* inactive devices */ |
b179b037 | 6319 | list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, |
5db8440c | 6320 | alias_list) { |
b179b037 SH |
6321 | spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); |
6322 | tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); | |
6323 | spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); | |
6324 | if (tbcpm < 0) | |
6325 | goto out_err; | |
6326 | paths |= tbcpm; | |
5db8440c | 6327 | } |
5db8440c SH |
6328 | /* devices in PAV groups */ |
6329 | list_for_each_entry_safe(pavgroup, tempgroup, | |
6330 | &private->lcu->grouplist, group) { | |
6331 | list_for_each_entry_safe(dev, n, &pavgroup->baselist, | |
6332 | alias_list) { | |
b179b037 SH |
6333 | spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); |
6334 | tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); | |
6335 | spin_unlock_irqrestore( | |
6336 | get_ccwdev_lock(dev->cdev), flags); | |
6337 | if (tbcpm < 0) | |
6338 | goto out_err; | |
6339 | paths |= tbcpm; | |
5db8440c SH |
6340 | } |
6341 | list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, | |
6342 | alias_list) { | |
b179b037 SH |
6343 | spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); |
6344 | tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); | |
6345 | spin_unlock_irqrestore( | |
6346 | get_ccwdev_lock(dev->cdev), flags); | |
6347 | if (tbcpm < 0) | |
6348 | goto out_err; | |
6349 | paths |= tbcpm; | |
5db8440c SH |
6350 | } |
6351 | } | |
b179b037 | 6352 | /* notify user about all paths affected by CUIR action */ |
a521b048 | 6353 | dasd_eckd_cuir_notify_user(device, paths, CUIR_QUIESCE); |
b179b037 SH |
6354 | return 0; |
6355 | out_err: | |
6356 | return tbcpm; | |
5db8440c SH |
6357 | } |
6358 | ||
6359 | static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum, | |
b179b037 | 6360 | struct dasd_cuir_message *cuir) |
5db8440c | 6361 | { |
543691a4 | 6362 | struct dasd_eckd_private *private = device->private; |
5db8440c | 6363 | struct alias_pav_group *pavgroup, *tempgroup; |
5db8440c | 6364 | struct dasd_device *dev, *n; |
b179b037 SH |
6365 | unsigned long paths = 0; |
6366 | int tbcpm; | |
5db8440c | 6367 | |
5db8440c SH |
6368 | /* |
6369 | * the path may have been added through a generic path event before | |
6370 | * only trigger path verification if the path is not already in use | |
6371 | */ | |
5db8440c SH |
6372 | list_for_each_entry_safe(dev, n, |
6373 | &private->lcu->active_devices, | |
6374 | alias_list) { | |
b179b037 SH |
6375 | tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); |
6376 | paths |= tbcpm; | |
c9346151 SH |
6377 | if (!(dasd_path_get_opm(dev) & tbcpm)) { |
6378 | dasd_path_add_tbvpm(dev, tbcpm); | |
5db8440c SH |
6379 | dasd_schedule_device_bh(dev); |
6380 | } | |
6381 | } | |
5db8440c SH |
6382 | list_for_each_entry_safe(dev, n, |
6383 | &private->lcu->inactive_devices, | |
6384 | alias_list) { | |
b179b037 SH |
6385 | tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); |
6386 | paths |= tbcpm; | |
c9346151 SH |
6387 | if (!(dasd_path_get_opm(dev) & tbcpm)) { |
6388 | dasd_path_add_tbvpm(dev, tbcpm); | |
5db8440c SH |
6389 | dasd_schedule_device_bh(dev); |
6390 | } | |
6391 | } | |
5db8440c SH |
6392 | /* devices in PAV groups */ |
6393 | list_for_each_entry_safe(pavgroup, tempgroup, | |
6394 | &private->lcu->grouplist, | |
6395 | group) { | |
6396 | list_for_each_entry_safe(dev, n, | |
6397 | &pavgroup->baselist, | |
6398 | alias_list) { | |
b179b037 SH |
6399 | tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); |
6400 | paths |= tbcpm; | |
c9346151 SH |
6401 | if (!(dasd_path_get_opm(dev) & tbcpm)) { |
6402 | dasd_path_add_tbvpm(dev, tbcpm); | |
5db8440c SH |
6403 | dasd_schedule_device_bh(dev); |
6404 | } | |
6405 | } | |
6406 | list_for_each_entry_safe(dev, n, | |
6407 | &pavgroup->aliaslist, | |
6408 | alias_list) { | |
b179b037 SH |
6409 | tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); |
6410 | paths |= tbcpm; | |
c9346151 SH |
6411 | if (!(dasd_path_get_opm(dev) & tbcpm)) { |
6412 | dasd_path_add_tbvpm(dev, tbcpm); | |
5db8440c SH |
6413 | dasd_schedule_device_bh(dev); |
6414 | } | |
6415 | } | |
6416 | } | |
b179b037 | 6417 | /* notify user about all paths affected by CUIR action */ |
a521b048 | 6418 | dasd_eckd_cuir_notify_user(device, paths, CUIR_RESUME); |
b179b037 | 6419 | return 0; |
5db8440c SH |
6420 | } |
6421 | ||
6422 | static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages, | |
6423 | __u8 lpum) | |
6424 | { | |
6425 | struct dasd_cuir_message *cuir = messages; | |
a521b048 | 6426 | int response; |
5db8440c | 6427 | |
b179b037 SH |
6428 | DBF_DEV_EVENT(DBF_WARNING, device, |
6429 | "CUIR request: %016llx %016llx %016llx %08x", | |
6430 | ((u64 *)cuir)[0], ((u64 *)cuir)[1], ((u64 *)cuir)[2], | |
6431 | ((u32 *)cuir)[3]); | |
5db8440c SH |
6432 | |
6433 | if (cuir->code == CUIR_QUIESCE) { | |
6434 | /* quiesce */ | |
a521b048 | 6435 | if (dasd_eckd_cuir_quiesce(device, lpum, cuir)) |
b179b037 SH |
6436 | response = PSF_CUIR_LAST_PATH; |
6437 | else | |
6438 | response = PSF_CUIR_COMPLETED; | |
5db8440c SH |
6439 | } else if (cuir->code == CUIR_RESUME) { |
6440 | /* resume */ | |
a521b048 | 6441 | dasd_eckd_cuir_resume(device, lpum, cuir); |
b179b037 | 6442 | response = PSF_CUIR_COMPLETED; |
5db8440c SH |
6443 | } else |
6444 | response = PSF_CUIR_NOT_SUPPORTED; | |
6445 | ||
b179b037 | 6446 | dasd_eckd_psf_cuir_response(device, response, |
a521b048 | 6447 | cuir->message_id, lpum); |
b179b037 SH |
6448 | DBF_DEV_EVENT(DBF_WARNING, device, |
6449 | "CUIR response: %d on message ID %08x", response, | |
6450 | cuir->message_id); | |
b179b037 SH |
6451 | /* to make sure there is no attention left schedule work again */ |
6452 | device->discipline->check_attention(device, lpum); | |
5db8440c SH |
6453 | } |
6454 | ||
9e12e54c JH |
6455 | static void dasd_eckd_oos_resume(struct dasd_device *device) |
6456 | { | |
6457 | struct dasd_eckd_private *private = device->private; | |
6458 | struct alias_pav_group *pavgroup, *tempgroup; | |
6459 | struct dasd_device *dev, *n; | |
6460 | unsigned long flags; | |
6461 | ||
6462 | spin_lock_irqsave(&private->lcu->lock, flags); | |
6463 | list_for_each_entry_safe(dev, n, &private->lcu->active_devices, | |
6464 | alias_list) { | |
6465 | if (dev->stopped & DASD_STOPPED_NOSPC) | |
6466 | dasd_generic_space_avail(dev); | |
6467 | } | |
6468 | list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, | |
6469 | alias_list) { | |
6470 | if (dev->stopped & DASD_STOPPED_NOSPC) | |
6471 | dasd_generic_space_avail(dev); | |
6472 | } | |
6473 | /* devices in PAV groups */ | |
6474 | list_for_each_entry_safe(pavgroup, tempgroup, | |
6475 | &private->lcu->grouplist, | |
6476 | group) { | |
6477 | list_for_each_entry_safe(dev, n, &pavgroup->baselist, | |
6478 | alias_list) { | |
6479 | if (dev->stopped & DASD_STOPPED_NOSPC) | |
6480 | dasd_generic_space_avail(dev); | |
6481 | } | |
6482 | list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, | |
6483 | alias_list) { | |
6484 | if (dev->stopped & DASD_STOPPED_NOSPC) | |
6485 | dasd_generic_space_avail(dev); | |
6486 | } | |
6487 | } | |
6488 | spin_unlock_irqrestore(&private->lcu->lock, flags); | |
6489 | } | |
6490 | ||
6491 | static void dasd_eckd_handle_oos(struct dasd_device *device, void *messages, | |
6492 | __u8 lpum) | |
6493 | { | |
6494 | struct dasd_oos_message *oos = messages; | |
6495 | ||
6496 | switch (oos->code) { | |
6497 | case REPO_WARN: | |
6498 | case POOL_WARN: | |
6499 | dev_warn(&device->cdev->dev, | |
6500 | "Extent pool usage has reached a critical value\n"); | |
6501 | dasd_eckd_oos_resume(device); | |
6502 | break; | |
6503 | case REPO_EXHAUST: | |
6504 | case POOL_EXHAUST: | |
6505 | dev_warn(&device->cdev->dev, | |
6506 | "Extent pool is exhausted\n"); | |
6507 | break; | |
6508 | case REPO_RELIEVE: | |
6509 | case POOL_RELIEVE: | |
6510 | dev_info(&device->cdev->dev, | |
6511 | "Extent pool physical space constraint has been relieved\n"); | |
6512 | break; | |
6513 | } | |
6514 | ||
6515 | /* In any case, update related data */ | |
6516 | dasd_eckd_read_ext_pool_info(device); | |
6517 | ||
6518 | /* to make sure there is no attention left schedule work again */ | |
6519 | device->discipline->check_attention(device, lpum); | |
6520 | } | |
6521 | ||
5db8440c SH |
6522 | static void dasd_eckd_check_attention_work(struct work_struct *work) |
6523 | { | |
6524 | struct check_attention_work_data *data; | |
6525 | struct dasd_rssd_messages *messages; | |
6526 | struct dasd_device *device; | |
6527 | int rc; | |
6528 | ||
6529 | data = container_of(work, struct check_attention_work_data, worker); | |
6530 | device = data->device; | |
5db8440c SH |
6531 | messages = kzalloc(sizeof(*messages), GFP_KERNEL); |
6532 | if (!messages) { | |
6533 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", | |
6534 | "Could not allocate attention message buffer"); | |
6535 | goto out; | |
6536 | } | |
5db8440c SH |
6537 | rc = dasd_eckd_read_message_buffer(device, messages, data->lpum); |
6538 | if (rc) | |
6539 | goto out; | |
9e12e54c | 6540 | |
5db8440c SH |
6541 | if (messages->length == ATTENTION_LENGTH_CUIR && |
6542 | messages->format == ATTENTION_FORMAT_CUIR) | |
6543 | dasd_eckd_handle_cuir(device, messages, data->lpum); | |
9e12e54c JH |
6544 | if (messages->length == ATTENTION_LENGTH_OOS && |
6545 | messages->format == ATTENTION_FORMAT_OOS) | |
6546 | dasd_eckd_handle_oos(device, messages, data->lpum); | |
6547 | ||
5db8440c SH |
6548 | out: |
6549 | dasd_put_device(device); | |
6550 | kfree(messages); | |
6551 | kfree(data); | |
6552 | } | |
6553 | ||
6554 | static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum) | |
6555 | { | |
6556 | struct check_attention_work_data *data; | |
6557 | ||
6558 | data = kzalloc(sizeof(*data), GFP_ATOMIC); | |
6559 | if (!data) | |
6560 | return -ENOMEM; | |
6561 | INIT_WORK(&data->worker, dasd_eckd_check_attention_work); | |
6562 | dasd_get_device(device); | |
6563 | data->device = device; | |
6564 | data->lpum = lpum; | |
6565 | schedule_work(&data->worker); | |
6566 | return 0; | |
6567 | } | |
6568 | ||
a521b048 SH |
6569 | static int dasd_eckd_disable_hpf_path(struct dasd_device *device, __u8 lpum) |
6570 | { | |
6571 | if (~lpum & dasd_path_get_opm(device)) { | |
6572 | dasd_path_add_nohpfpm(device, lpum); | |
6573 | dasd_path_remove_opm(device, lpum); | |
6574 | dev_err(&device->cdev->dev, | |
6575 | "Channel path %02X lost HPF functionality and is disabled\n", | |
6576 | lpum); | |
6577 | return 1; | |
6578 | } | |
6579 | return 0; | |
6580 | } | |
6581 | ||
6582 | static void dasd_eckd_disable_hpf_device(struct dasd_device *device) | |
6583 | { | |
6584 | struct dasd_eckd_private *private = device->private; | |
6585 | ||
6586 | dev_err(&device->cdev->dev, | |
6587 | "High Performance FICON disabled\n"); | |
6588 | private->fcx_max_data = 0; | |
6589 | } | |
6590 | ||
6591 | static int dasd_eckd_hpf_enabled(struct dasd_device *device) | |
6592 | { | |
6593 | struct dasd_eckd_private *private = device->private; | |
6594 | ||
6595 | return private->fcx_max_data ? 1 : 0; | |
6596 | } | |
6597 | ||
6598 | static void dasd_eckd_handle_hpf_error(struct dasd_device *device, | |
6599 | struct irb *irb) | |
6600 | { | |
6601 | struct dasd_eckd_private *private = device->private; | |
6602 | ||
6603 | if (!private->fcx_max_data) { | |
6604 | /* sanity check for no HPF, the error makes no sense */ | |
6605 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", | |
6606 | "Trying to disable HPF for a non HPF device"); | |
6607 | return; | |
6608 | } | |
6609 | if (irb->scsw.tm.sesq == SCSW_SESQ_DEV_NOFCX) { | |
6610 | dasd_eckd_disable_hpf_device(device); | |
6611 | } else if (irb->scsw.tm.sesq == SCSW_SESQ_PATH_NOFCX) { | |
6612 | if (dasd_eckd_disable_hpf_path(device, irb->esw.esw1.lpum)) | |
6613 | return; | |
6614 | dasd_eckd_disable_hpf_device(device); | |
6615 | dasd_path_set_tbvpm(device, | |
6616 | dasd_path_get_hpfpm(device)); | |
6617 | } | |
6618 | /* | |
6619 | * prevent that any new I/O ist started on the device and schedule a | |
6620 | * requeue of existing requests | |
6621 | */ | |
6622 | dasd_device_set_stop_bits(device, DASD_STOPPED_NOT_ACC); | |
6623 | dasd_schedule_requeue(device); | |
6624 | } | |
6625 | ||
a0610a8a JH |
6626 | /* |
6627 | * Initialize block layer request queue. | |
6628 | */ | |
6629 | static void dasd_eckd_setup_blk_queue(struct dasd_block *block) | |
6630 | { | |
6631 | unsigned int logical_block_size = block->bp_block; | |
6632 | struct request_queue *q = block->request_queue; | |
6633 | struct dasd_device *device = block->base; | |
6634 | int max; | |
6635 | ||
6636 | if (device->features & DASD_FEATURE_USERAW) { | |
6637 | /* | |
6638 | * the max_blocks value for raw_track access is 256 | |
6639 | * it is higher than the native ECKD value because we | |
6640 | * only need one ccw per track | |
6641 | * so the max_hw_sectors are | |
6642 | * 2048 x 512B = 1024kB = 16 tracks | |
6643 | */ | |
6644 | max = DASD_ECKD_MAX_BLOCKS_RAW << block->s2b_shift; | |
6645 | } else { | |
6646 | max = DASD_ECKD_MAX_BLOCKS << block->s2b_shift; | |
6647 | } | |
6648 | blk_queue_flag_set(QUEUE_FLAG_NONROT, q); | |
6649 | q->limits.max_dev_sectors = max; | |
6650 | blk_queue_logical_block_size(q, logical_block_size); | |
6651 | blk_queue_max_hw_sectors(q, max); | |
6652 | blk_queue_max_segments(q, USHRT_MAX); | |
6653 | /* With page sized segments each segment can be translated into one idaw/tidaw */ | |
6654 | blk_queue_max_segment_size(q, PAGE_SIZE); | |
6655 | blk_queue_segment_boundary(q, PAGE_SIZE - 1); | |
6656 | } | |
6657 | ||
d41dd122 | 6658 | static struct ccw_driver dasd_eckd_driver = { |
3bda058b SO |
6659 | .driver = { |
6660 | .name = "dasd-eckd", | |
6661 | .owner = THIS_MODULE, | |
6662 | }, | |
d41dd122 SH |
6663 | .ids = dasd_eckd_ids, |
6664 | .probe = dasd_eckd_probe, | |
6665 | .remove = dasd_generic_remove, | |
6666 | .set_offline = dasd_generic_set_offline, | |
6667 | .set_online = dasd_eckd_set_online, | |
6668 | .notify = dasd_generic_notify, | |
a4d26c6a | 6669 | .path_event = dasd_generic_path_event, |
4679e893 | 6670 | .shutdown = dasd_generic_shutdown, |
d41dd122 SH |
6671 | .freeze = dasd_generic_pm_freeze, |
6672 | .thaw = dasd_generic_restore_device, | |
6673 | .restore = dasd_generic_restore_device, | |
a23ed009 | 6674 | .uc_handler = dasd_generic_uc_handler, |
420f42ec | 6675 | .int_class = IRQIO_DAS, |
d41dd122 | 6676 | }; |
f3eb5384 | 6677 | |
1da177e4 LT |
6678 | static struct dasd_discipline dasd_eckd_discipline = { |
6679 | .owner = THIS_MODULE, | |
6680 | .name = "ECKD", | |
6681 | .ebcname = "ECKD", | |
1da177e4 | 6682 | .check_device = dasd_eckd_check_characteristics, |
8e09f215 | 6683 | .uncheck_device = dasd_eckd_uncheck_device, |
1da177e4 | 6684 | .do_analysis = dasd_eckd_do_analysis, |
a4d26c6a | 6685 | .verify_path = dasd_eckd_verify_path, |
d42e1712 | 6686 | .basic_to_ready = dasd_eckd_basic_to_ready, |
8e09f215 | 6687 | .online_to_ready = dasd_eckd_online_to_ready, |
daa991bf | 6688 | .basic_to_known = dasd_eckd_basic_to_known, |
a0610a8a | 6689 | .setup_blk_queue = dasd_eckd_setup_blk_queue, |
1da177e4 LT |
6690 | .fill_geometry = dasd_eckd_fill_geometry, |
6691 | .start_IO = dasd_start_IO, | |
6692 | .term_IO = dasd_term_IO, | |
8e09f215 | 6693 | .handle_terminated_request = dasd_eckd_handle_terminated_request, |
1da177e4 | 6694 | .format_device = dasd_eckd_format_device, |
8fd57520 | 6695 | .check_device_format = dasd_eckd_check_device_format, |
1da177e4 LT |
6696 | .erp_action = dasd_eckd_erp_action, |
6697 | .erp_postaction = dasd_eckd_erp_postaction, | |
5a27e60d | 6698 | .check_for_device_change = dasd_eckd_check_for_device_change, |
8e09f215 SW |
6699 | .build_cp = dasd_eckd_build_alias_cp, |
6700 | .free_cp = dasd_eckd_free_alias_cp, | |
1da177e4 | 6701 | .dump_sense = dasd_eckd_dump_sense, |
fc19f381 | 6702 | .dump_sense_dbf = dasd_eckd_dump_sense_dbf, |
1da177e4 | 6703 | .fill_info = dasd_eckd_fill_info, |
1107ccfb | 6704 | .ioctl = dasd_eckd_ioctl, |
d41dd122 SH |
6705 | .freeze = dasd_eckd_pm_freeze, |
6706 | .restore = dasd_eckd_restore_device, | |
501183f2 | 6707 | .reload = dasd_eckd_reload_device, |
2dedf0d9 | 6708 | .get_uid = dasd_eckd_get_uid, |
f1633031 | 6709 | .kick_validate = dasd_eckd_kick_validate_server, |
5db8440c | 6710 | .check_attention = dasd_eckd_check_attention, |
5a3b7b11 SH |
6711 | .host_access_count = dasd_eckd_host_access_count, |
6712 | .hosts_print = dasd_hosts_print, | |
a521b048 SH |
6713 | .handle_hpf_error = dasd_eckd_handle_hpf_error, |
6714 | .disable_hpf = dasd_eckd_disable_hpf_device, | |
6715 | .hpf_enabled = dasd_eckd_hpf_enabled, | |
6716 | .reset_path = dasd_eckd_reset_path, | |
c729696b JH |
6717 | .is_ese = dasd_eckd_is_ese, |
6718 | .space_allocated = dasd_eckd_space_allocated, | |
6719 | .space_configured = dasd_eckd_space_configured, | |
6720 | .logical_capacity = dasd_eckd_logical_capacity, | |
91dc4a19 | 6721 | .release_space = dasd_eckd_release_space, |
c729696b JH |
6722 | .ext_pool_id = dasd_eckd_ext_pool_id, |
6723 | .ext_size = dasd_eckd_ext_size, | |
6724 | .ext_pool_cap_at_warnlevel = dasd_eckd_ext_pool_cap_at_warnlevel, | |
6725 | .ext_pool_warn_thrshld = dasd_eckd_ext_pool_warn_thrshld, | |
6726 | .ext_pool_oos = dasd_eckd_ext_pool_oos, | |
9e12e54c | 6727 | .ext_pool_exhaust = dasd_eckd_ext_pool_exhaust, |
5e2b17e7 JH |
6728 | .ese_format = dasd_eckd_ese_format, |
6729 | .ese_read = dasd_eckd_ese_read, | |
1da177e4 LT |
6730 | }; |
6731 | ||
6732 | static int __init | |
6733 | dasd_eckd_init(void) | |
6734 | { | |
736e6ea0 SO |
6735 | int ret; |
6736 | ||
1da177e4 | 6737 | ASCEBC(dasd_eckd_discipline.ebcname, 4); |
f932bcea SW |
6738 | dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), |
6739 | GFP_KERNEL | GFP_DMA); | |
6740 | if (!dasd_reserve_req) | |
6741 | return -ENOMEM; | |
9e12e54c JH |
6742 | dasd_vol_info_req = kmalloc(sizeof(*dasd_vol_info_req), |
6743 | GFP_KERNEL | GFP_DMA); | |
6744 | if (!dasd_vol_info_req) | |
6745 | return -ENOMEM; | |
a4d26c6a SW |
6746 | path_verification_worker = kmalloc(sizeof(*path_verification_worker), |
6747 | GFP_KERNEL | GFP_DMA); | |
6748 | if (!path_verification_worker) { | |
6749 | kfree(dasd_reserve_req); | |
9e12e54c | 6750 | kfree(dasd_vol_info_req); |
a4d26c6a SW |
6751 | return -ENOMEM; |
6752 | } | |
558b9ef0 SW |
6753 | rawpadpage = (void *)__get_free_page(GFP_KERNEL); |
6754 | if (!rawpadpage) { | |
6755 | kfree(path_verification_worker); | |
6756 | kfree(dasd_reserve_req); | |
9e12e54c | 6757 | kfree(dasd_vol_info_req); |
558b9ef0 SW |
6758 | return -ENOMEM; |
6759 | } | |
736e6ea0 SO |
6760 | ret = ccw_driver_register(&dasd_eckd_driver); |
6761 | if (!ret) | |
6762 | wait_for_device_probe(); | |
a4d26c6a SW |
6763 | else { |
6764 | kfree(path_verification_worker); | |
f932bcea | 6765 | kfree(dasd_reserve_req); |
9e12e54c | 6766 | kfree(dasd_vol_info_req); |
558b9ef0 | 6767 | free_page((unsigned long)rawpadpage); |
a4d26c6a | 6768 | } |
736e6ea0 | 6769 | return ret; |
1da177e4 LT |
6770 | } |
6771 | ||
6772 | static void __exit | |
6773 | dasd_eckd_cleanup(void) | |
6774 | { | |
6775 | ccw_driver_unregister(&dasd_eckd_driver); | |
a4d26c6a | 6776 | kfree(path_verification_worker); |
f932bcea | 6777 | kfree(dasd_reserve_req); |
558b9ef0 | 6778 | free_page((unsigned long)rawpadpage); |
1da177e4 LT |
6779 | } |
6780 | ||
6781 | module_init(dasd_eckd_init); | |
6782 | module_exit(dasd_eckd_cleanup); |