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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 | ||
45 | #define ECKD_C0(i) (i->home_bytes) | |
46 | #define ECKD_F(i) (i->formula) | |
47 | #define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\ | |
48 | (i->factors.f_0x02.f1)) | |
49 | #define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\ | |
50 | (i->factors.f_0x02.f2)) | |
51 | #define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\ | |
52 | (i->factors.f_0x02.f3)) | |
53 | #define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0) | |
54 | #define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0) | |
55 | #define ECKD_F6(i) (i->factor6) | |
56 | #define ECKD_F7(i) (i->factor7) | |
57 | #define ECKD_F8(i) (i->factor8) | |
58 | ||
e4dbb0f2 SH |
59 | /* |
60 | * raw track access always map to 64k in memory | |
61 | * so it maps to 16 blocks of 4k per track | |
62 | */ | |
63 | #define DASD_RAW_BLOCK_PER_TRACK 16 | |
64 | #define DASD_RAW_BLOCKSIZE 4096 | |
65 | /* 64k are 128 x 512 byte sectors */ | |
66 | #define DASD_RAW_SECTORS_PER_TRACK 128 | |
67 | ||
1da177e4 LT |
68 | MODULE_LICENSE("GPL"); |
69 | ||
70 | static struct dasd_discipline dasd_eckd_discipline; | |
71 | ||
1da177e4 LT |
72 | /* The ccw bus type uses this table to find devices that it sends to |
73 | * dasd_eckd_probe */ | |
74 | static struct ccw_device_id dasd_eckd_ids[] = { | |
d2c993d8 HC |
75 | { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1}, |
76 | { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2}, | |
5da24b76 | 77 | { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info = 0x3}, |
d2c993d8 HC |
78 | { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4}, |
79 | { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5}, | |
80 | { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6}, | |
81 | { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7}, | |
82 | { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8}, | |
83 | { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9}, | |
84 | { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa}, | |
1da177e4 LT |
85 | { /* end of list */ }, |
86 | }; | |
87 | ||
88 | MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids); | |
89 | ||
90 | static struct ccw_driver dasd_eckd_driver; /* see below */ | |
91 | ||
558b9ef0 SW |
92 | static void *rawpadpage; |
93 | ||
eb6e199b SW |
94 | #define INIT_CQR_OK 0 |
95 | #define INIT_CQR_UNFORMATTED 1 | |
96 | #define INIT_CQR_ERROR 2 | |
97 | ||
f932bcea SW |
98 | /* emergency request for reserve/release */ |
99 | static struct { | |
100 | struct dasd_ccw_req cqr; | |
101 | struct ccw1 ccw; | |
102 | char data[32]; | |
103 | } *dasd_reserve_req; | |
104 | static DEFINE_MUTEX(dasd_reserve_mutex); | |
105 | ||
a4d26c6a SW |
106 | /* definitions for the path verification worker */ |
107 | struct path_verification_work_data { | |
108 | struct work_struct worker; | |
109 | struct dasd_device *device; | |
110 | struct dasd_ccw_req cqr; | |
111 | struct ccw1 ccw; | |
112 | __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE]; | |
113 | int isglobal; | |
114 | __u8 tbvpm; | |
115 | }; | |
116 | static struct path_verification_work_data *path_verification_worker; | |
117 | static DEFINE_MUTEX(dasd_path_verification_mutex); | |
eb6e199b | 118 | |
5db8440c SH |
119 | struct check_attention_work_data { |
120 | struct work_struct worker; | |
121 | struct dasd_device *device; | |
122 | __u8 lpum; | |
123 | }; | |
124 | ||
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 SH |
159 | /* head and record addresses of count_area read in analysis ccw */ |
160 | static const int count_area_head[] = { 0, 0, 0, 0, 2 }; | |
161 | static const int count_area_rec[] = { 1, 2, 3, 4, 1 }; | |
162 | ||
1da177e4 LT |
163 | static inline unsigned int |
164 | round_up_multiple(unsigned int no, unsigned int mult) | |
165 | { | |
166 | int rem = no % mult; | |
167 | return (rem ? no - rem + mult : no); | |
168 | } | |
169 | ||
170 | static inline unsigned int | |
171 | ceil_quot(unsigned int d1, unsigned int d2) | |
172 | { | |
173 | return (d1 + (d2 - 1)) / d2; | |
174 | } | |
175 | ||
4d284cac | 176 | static unsigned int |
1da177e4 LT |
177 | recs_per_track(struct dasd_eckd_characteristics * rdc, |
178 | unsigned int kl, unsigned int dl) | |
179 | { | |
180 | int dn, kn; | |
181 | ||
182 | switch (rdc->dev_type) { | |
183 | case 0x3380: | |
184 | if (kl) | |
185 | return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + | |
186 | ceil_quot(dl + 12, 32)); | |
187 | else | |
188 | return 1499 / (15 + ceil_quot(dl + 12, 32)); | |
189 | case 0x3390: | |
190 | dn = ceil_quot(dl + 6, 232) + 1; | |
191 | if (kl) { | |
192 | kn = ceil_quot(kl + 6, 232) + 1; | |
193 | return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + | |
194 | 9 + ceil_quot(dl + 6 * dn, 34)); | |
195 | } else | |
196 | return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); | |
197 | case 0x9345: | |
198 | dn = ceil_quot(dl + 6, 232) + 1; | |
199 | if (kl) { | |
200 | kn = ceil_quot(kl + 6, 232) + 1; | |
201 | return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + | |
202 | ceil_quot(dl + 6 * dn, 34)); | |
203 | } else | |
204 | return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); | |
205 | } | |
206 | return 0; | |
207 | } | |
208 | ||
b44b0ab3 SW |
209 | static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) |
210 | { | |
211 | geo->cyl = (__u16) cyl; | |
212 | geo->head = cyl >> 16; | |
213 | geo->head <<= 4; | |
214 | geo->head |= head; | |
215 | } | |
216 | ||
45f186be JH |
217 | static int check_XRC(struct ccw1 *ccw, struct DE_eckd_data *data, |
218 | struct dasd_device *device) | |
1da177e4 | 219 | { |
543691a4 | 220 | struct dasd_eckd_private *private = device->private; |
d54853ef | 221 | int rc; |
1da177e4 | 222 | |
d54853ef MS |
223 | if (!private->rdc_data.facilities.XRC_supported) |
224 | return 0; | |
1da177e4 | 225 | |
45f186be | 226 | /* switch on System Time Stamp - needed for XRC Support */ |
d54853ef MS |
227 | data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ |
228 | data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ | |
1da177e4 | 229 | |
40277891 | 230 | rc = get_phys_clock(&data->ep_sys_time); |
d54853ef | 231 | /* Ignore return code if sync clock is switched off. */ |
a8f6db4d | 232 | if (rc == -EOPNOTSUPP || rc == -EACCES) |
d54853ef | 233 | rc = 0; |
1da177e4 | 234 | |
45f186be JH |
235 | if (ccw) { |
236 | ccw->count = sizeof(struct DE_eckd_data); | |
237 | ccw->flags |= CCW_FLAG_SLI; | |
238 | } | |
239 | ||
d54853ef MS |
240 | return rc; |
241 | } | |
1da177e4 | 242 | |
4d284cac | 243 | static int |
b44b0ab3 | 244 | define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, |
45f186be JH |
245 | unsigned int totrk, int cmd, struct dasd_device *device, |
246 | int blksize) | |
1da177e4 | 247 | { |
543691a4 | 248 | struct dasd_eckd_private *private = device->private; |
b44b0ab3 | 249 | u16 heads, beghead, endhead; |
45f186be | 250 | u32 begcyl, endcyl; |
d54853ef | 251 | int rc = 0; |
1da177e4 | 252 | |
45f186be JH |
253 | if (ccw) { |
254 | ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; | |
255 | ccw->flags = 0; | |
256 | ccw->count = 16; | |
257 | ccw->cda = (__u32)__pa(data); | |
258 | } | |
1da177e4 | 259 | |
8e09f215 | 260 | memset(data, 0, sizeof(struct DE_eckd_data)); |
1da177e4 LT |
261 | switch (cmd) { |
262 | case DASD_ECKD_CCW_READ_HOME_ADDRESS: | |
263 | case DASD_ECKD_CCW_READ_RECORD_ZERO: | |
264 | case DASD_ECKD_CCW_READ: | |
265 | case DASD_ECKD_CCW_READ_MT: | |
266 | case DASD_ECKD_CCW_READ_CKD: | |
267 | case DASD_ECKD_CCW_READ_CKD_MT: | |
268 | case DASD_ECKD_CCW_READ_KD: | |
269 | case DASD_ECKD_CCW_READ_KD_MT: | |
1da177e4 LT |
270 | data->mask.perm = 0x1; |
271 | data->attributes.operation = private->attrib.operation; | |
272 | break; | |
8fd57520 JH |
273 | case DASD_ECKD_CCW_READ_COUNT: |
274 | data->mask.perm = 0x1; | |
275 | data->attributes.operation = DASD_BYPASS_CACHE; | |
276 | break; | |
45f186be JH |
277 | case DASD_ECKD_CCW_READ_TRACK: |
278 | case DASD_ECKD_CCW_READ_TRACK_DATA: | |
279 | data->mask.perm = 0x1; | |
280 | data->attributes.operation = private->attrib.operation; | |
281 | data->blk_size = 0; | |
282 | break; | |
1da177e4 LT |
283 | case DASD_ECKD_CCW_WRITE: |
284 | case DASD_ECKD_CCW_WRITE_MT: | |
285 | case DASD_ECKD_CCW_WRITE_KD: | |
286 | case DASD_ECKD_CCW_WRITE_KD_MT: | |
287 | data->mask.perm = 0x02; | |
288 | data->attributes.operation = private->attrib.operation; | |
45f186be | 289 | rc = check_XRC(ccw, data, device); |
1da177e4 LT |
290 | break; |
291 | case DASD_ECKD_CCW_WRITE_CKD: | |
292 | case DASD_ECKD_CCW_WRITE_CKD_MT: | |
293 | data->attributes.operation = DASD_BYPASS_CACHE; | |
45f186be | 294 | rc = check_XRC(ccw, data, device); |
1da177e4 LT |
295 | break; |
296 | case DASD_ECKD_CCW_ERASE: | |
297 | case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: | |
298 | case DASD_ECKD_CCW_WRITE_RECORD_ZERO: | |
299 | data->mask.perm = 0x3; | |
300 | data->mask.auth = 0x1; | |
301 | data->attributes.operation = DASD_BYPASS_CACHE; | |
45f186be JH |
302 | rc = check_XRC(ccw, data, device); |
303 | break; | |
304 | case DASD_ECKD_CCW_WRITE_FULL_TRACK: | |
305 | data->mask.perm = 0x03; | |
306 | data->attributes.operation = private->attrib.operation; | |
307 | data->blk_size = 0; | |
308 | break; | |
309 | case DASD_ECKD_CCW_WRITE_TRACK_DATA: | |
310 | data->mask.perm = 0x02; | |
311 | data->attributes.operation = private->attrib.operation; | |
312 | data->blk_size = blksize; | |
313 | rc = check_XRC(ccw, data, device); | |
1da177e4 LT |
314 | break; |
315 | default: | |
fc19f381 SH |
316 | dev_err(&device->cdev->dev, |
317 | "0x%x is not a known command\n", cmd); | |
1da177e4 LT |
318 | break; |
319 | } | |
320 | ||
321 | data->attributes.mode = 0x3; /* ECKD */ | |
322 | ||
323 | if ((private->rdc_data.cu_type == 0x2105 || | |
324 | private->rdc_data.cu_type == 0x2107 || | |
325 | private->rdc_data.cu_type == 0x1750) | |
326 | && !(private->uses_cdl && trk < 2)) | |
327 | data->ga_extended |= 0x40; /* Regular Data Format Mode */ | |
328 | ||
b44b0ab3 SW |
329 | heads = private->rdc_data.trk_per_cyl; |
330 | begcyl = trk / heads; | |
331 | beghead = trk % heads; | |
332 | endcyl = totrk / heads; | |
333 | endhead = totrk % heads; | |
1da177e4 LT |
334 | |
335 | /* check for sequential prestage - enhance cylinder range */ | |
336 | if (data->attributes.operation == DASD_SEQ_PRESTAGE || | |
337 | data->attributes.operation == DASD_SEQ_ACCESS) { | |
138c014d | 338 | |
b44b0ab3 SW |
339 | if (endcyl + private->attrib.nr_cyl < private->real_cyl) |
340 | endcyl += private->attrib.nr_cyl; | |
1da177e4 | 341 | else |
b44b0ab3 | 342 | endcyl = (private->real_cyl - 1); |
1da177e4 LT |
343 | } |
344 | ||
b44b0ab3 SW |
345 | set_ch_t(&data->beg_ext, begcyl, beghead); |
346 | set_ch_t(&data->end_ext, endcyl, endhead); | |
d54853ef | 347 | return rc; |
1da177e4 LT |
348 | } |
349 | ||
8e09f215 | 350 | |
45f186be JH |
351 | static void locate_record_ext(struct ccw1 *ccw, struct LRE_eckd_data *data, |
352 | unsigned int trk, unsigned int rec_on_trk, | |
353 | int count, int cmd, struct dasd_device *device, | |
354 | unsigned int reclen, unsigned int tlf) | |
f3eb5384 | 355 | { |
543691a4 | 356 | struct dasd_eckd_private *private = device->private; |
f3eb5384 SW |
357 | int sector; |
358 | int dn, d; | |
359 | ||
45f186be JH |
360 | if (ccw) { |
361 | ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD_EXT; | |
362 | ccw->flags = 0; | |
363 | if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) | |
364 | ccw->count = 22; | |
365 | else | |
366 | ccw->count = 20; | |
367 | ccw->cda = (__u32)__pa(data); | |
368 | } | |
369 | ||
f3eb5384 SW |
370 | memset(data, 0, sizeof(*data)); |
371 | sector = 0; | |
372 | if (rec_on_trk) { | |
373 | switch (private->rdc_data.dev_type) { | |
374 | case 0x3390: | |
375 | dn = ceil_quot(reclen + 6, 232); | |
376 | d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); | |
377 | sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; | |
378 | break; | |
379 | case 0x3380: | |
380 | d = 7 + ceil_quot(reclen + 12, 32); | |
381 | sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; | |
382 | break; | |
383 | } | |
384 | } | |
385 | data->sector = sector; | |
386 | /* note: meaning of count depends on the operation | |
387 | * for record based I/O it's the number of records, but for | |
388 | * track based I/O it's the number of tracks | |
389 | */ | |
390 | data->count = count; | |
391 | switch (cmd) { | |
392 | case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: | |
393 | data->operation.orientation = 0x3; | |
394 | data->operation.operation = 0x03; | |
395 | break; | |
396 | case DASD_ECKD_CCW_READ_HOME_ADDRESS: | |
397 | data->operation.orientation = 0x3; | |
398 | data->operation.operation = 0x16; | |
399 | break; | |
400 | case DASD_ECKD_CCW_WRITE_RECORD_ZERO: | |
401 | data->operation.orientation = 0x1; | |
402 | data->operation.operation = 0x03; | |
403 | data->count++; | |
404 | break; | |
405 | case DASD_ECKD_CCW_READ_RECORD_ZERO: | |
406 | data->operation.orientation = 0x3; | |
407 | data->operation.operation = 0x16; | |
408 | data->count++; | |
409 | break; | |
410 | case DASD_ECKD_CCW_WRITE: | |
411 | case DASD_ECKD_CCW_WRITE_MT: | |
412 | case DASD_ECKD_CCW_WRITE_KD: | |
413 | case DASD_ECKD_CCW_WRITE_KD_MT: | |
414 | data->auxiliary.length_valid = 0x1; | |
415 | data->length = reclen; | |
416 | data->operation.operation = 0x01; | |
417 | break; | |
418 | case DASD_ECKD_CCW_WRITE_CKD: | |
419 | case DASD_ECKD_CCW_WRITE_CKD_MT: | |
420 | data->auxiliary.length_valid = 0x1; | |
421 | data->length = reclen; | |
422 | data->operation.operation = 0x03; | |
423 | break; | |
e4dbb0f2 SH |
424 | case DASD_ECKD_CCW_WRITE_FULL_TRACK: |
425 | data->operation.orientation = 0x0; | |
426 | data->operation.operation = 0x3F; | |
427 | data->extended_operation = 0x11; | |
428 | data->length = 0; | |
429 | data->extended_parameter_length = 0x02; | |
430 | if (data->count > 8) { | |
431 | data->extended_parameter[0] = 0xFF; | |
432 | data->extended_parameter[1] = 0xFF; | |
433 | data->extended_parameter[1] <<= (16 - count); | |
434 | } else { | |
435 | data->extended_parameter[0] = 0xFF; | |
436 | data->extended_parameter[0] <<= (8 - count); | |
437 | data->extended_parameter[1] = 0x00; | |
438 | } | |
439 | data->sector = 0xFF; | |
440 | break; | |
f3eb5384 SW |
441 | case DASD_ECKD_CCW_WRITE_TRACK_DATA: |
442 | data->auxiliary.length_valid = 0x1; | |
443 | data->length = reclen; /* not tlf, as one might think */ | |
444 | data->operation.operation = 0x3F; | |
445 | data->extended_operation = 0x23; | |
446 | break; | |
447 | case DASD_ECKD_CCW_READ: | |
448 | case DASD_ECKD_CCW_READ_MT: | |
449 | case DASD_ECKD_CCW_READ_KD: | |
450 | case DASD_ECKD_CCW_READ_KD_MT: | |
451 | data->auxiliary.length_valid = 0x1; | |
452 | data->length = reclen; | |
453 | data->operation.operation = 0x06; | |
454 | break; | |
455 | case DASD_ECKD_CCW_READ_CKD: | |
456 | case DASD_ECKD_CCW_READ_CKD_MT: | |
457 | data->auxiliary.length_valid = 0x1; | |
458 | data->length = reclen; | |
459 | data->operation.operation = 0x16; | |
460 | break; | |
461 | case DASD_ECKD_CCW_READ_COUNT: | |
462 | data->operation.operation = 0x06; | |
463 | break; | |
e4dbb0f2 SH |
464 | case DASD_ECKD_CCW_READ_TRACK: |
465 | data->operation.orientation = 0x1; | |
466 | data->operation.operation = 0x0C; | |
467 | data->extended_parameter_length = 0; | |
468 | data->sector = 0xFF; | |
469 | break; | |
f3eb5384 SW |
470 | case DASD_ECKD_CCW_READ_TRACK_DATA: |
471 | data->auxiliary.length_valid = 0x1; | |
472 | data->length = tlf; | |
473 | data->operation.operation = 0x0C; | |
474 | break; | |
475 | case DASD_ECKD_CCW_ERASE: | |
476 | data->length = reclen; | |
477 | data->auxiliary.length_valid = 0x1; | |
478 | data->operation.operation = 0x0b; | |
479 | break; | |
480 | default: | |
481 | DBF_DEV_EVENT(DBF_ERR, device, | |
482 | "fill LRE unknown opcode 0x%x", cmd); | |
483 | BUG(); | |
484 | } | |
485 | set_ch_t(&data->seek_addr, | |
486 | trk / private->rdc_data.trk_per_cyl, | |
487 | trk % private->rdc_data.trk_per_cyl); | |
488 | data->search_arg.cyl = data->seek_addr.cyl; | |
489 | data->search_arg.head = data->seek_addr.head; | |
490 | data->search_arg.record = rec_on_trk; | |
491 | } | |
492 | ||
493 | static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, | |
494 | unsigned int trk, unsigned int totrk, int cmd, | |
495 | struct dasd_device *basedev, struct dasd_device *startdev, | |
45f186be | 496 | unsigned int format, unsigned int rec_on_trk, int count, |
f3eb5384 | 497 | unsigned int blksize, unsigned int tlf) |
8e09f215 SW |
498 | { |
499 | struct dasd_eckd_private *basepriv, *startpriv; | |
f3eb5384 | 500 | struct LRE_eckd_data *lredata; |
45f186be | 501 | struct DE_eckd_data *dedata; |
8e09f215 SW |
502 | int rc = 0; |
503 | ||
543691a4 SO |
504 | basepriv = basedev->private; |
505 | startpriv = startdev->private; | |
f3eb5384 SW |
506 | dedata = &pfxdata->define_extent; |
507 | lredata = &pfxdata->locate_record; | |
8e09f215 SW |
508 | |
509 | ccw->cmd_code = DASD_ECKD_CCW_PFX; | |
510 | ccw->flags = 0; | |
e4dbb0f2 SH |
511 | if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) { |
512 | ccw->count = sizeof(*pfxdata) + 2; | |
513 | ccw->cda = (__u32) __pa(pfxdata); | |
514 | memset(pfxdata, 0, sizeof(*pfxdata) + 2); | |
515 | } else { | |
516 | ccw->count = sizeof(*pfxdata); | |
517 | ccw->cda = (__u32) __pa(pfxdata); | |
518 | memset(pfxdata, 0, sizeof(*pfxdata)); | |
519 | } | |
8e09f215 | 520 | |
8e09f215 | 521 | /* prefix data */ |
f3eb5384 SW |
522 | if (format > 1) { |
523 | DBF_DEV_EVENT(DBF_ERR, basedev, | |
524 | "PFX LRE unknown format 0x%x", format); | |
525 | BUG(); | |
526 | return -EINVAL; | |
527 | } | |
528 | pfxdata->format = format; | |
4abb08c2 SW |
529 | pfxdata->base_address = basepriv->ned->unit_addr; |
530 | pfxdata->base_lss = basepriv->ned->ID; | |
f3eb5384 | 531 | pfxdata->validity.define_extent = 1; |
8e09f215 SW |
532 | |
533 | /* private uid is kept up to date, conf_data may be outdated */ | |
da340f92 | 534 | if (startpriv->uid.type == UA_BASE_PAV_ALIAS) |
8e09f215 | 535 | pfxdata->validity.verify_base = 1; |
da340f92 SH |
536 | |
537 | if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) { | |
538 | pfxdata->validity.verify_base = 1; | |
539 | pfxdata->validity.hyper_pav = 1; | |
8e09f215 SW |
540 | } |
541 | ||
45f186be | 542 | rc = define_extent(NULL, dedata, trk, totrk, cmd, basedev, blksize); |
8e09f215 | 543 | |
45f186be JH |
544 | /* |
545 | * For some commands the System Time Stamp is set in the define extent | |
546 | * data when XRC is supported. The validity of the time stamp must be | |
547 | * reflected in the prefix data as well. | |
548 | */ | |
549 | if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02) | |
550 | pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ | |
f3eb5384 SW |
551 | |
552 | if (format == 1) { | |
45f186be JH |
553 | locate_record_ext(NULL, lredata, trk, rec_on_trk, count, cmd, |
554 | basedev, blksize, tlf); | |
f3eb5384 SW |
555 | } |
556 | ||
8e09f215 SW |
557 | return rc; |
558 | } | |
559 | ||
f3eb5384 SW |
560 | static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, |
561 | unsigned int trk, unsigned int totrk, int cmd, | |
562 | struct dasd_device *basedev, struct dasd_device *startdev) | |
563 | { | |
564 | return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev, | |
565 | 0, 0, 0, 0, 0); | |
566 | } | |
567 | ||
4d284cac | 568 | static void |
b44b0ab3 SW |
569 | locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, |
570 | unsigned int rec_on_trk, int no_rec, int cmd, | |
1da177e4 LT |
571 | struct dasd_device * device, int reclen) |
572 | { | |
543691a4 | 573 | struct dasd_eckd_private *private = device->private; |
1da177e4 LT |
574 | int sector; |
575 | int dn, d; | |
138c014d | 576 | |
1da177e4 LT |
577 | DBF_DEV_EVENT(DBF_INFO, device, |
578 | "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", | |
579 | trk, rec_on_trk, no_rec, cmd, reclen); | |
580 | ||
581 | ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; | |
582 | ccw->flags = 0; | |
583 | ccw->count = 16; | |
584 | ccw->cda = (__u32) __pa(data); | |
585 | ||
8e09f215 | 586 | memset(data, 0, sizeof(struct LO_eckd_data)); |
1da177e4 LT |
587 | sector = 0; |
588 | if (rec_on_trk) { | |
589 | switch (private->rdc_data.dev_type) { | |
590 | case 0x3390: | |
591 | dn = ceil_quot(reclen + 6, 232); | |
592 | d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); | |
593 | sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; | |
594 | break; | |
595 | case 0x3380: | |
596 | d = 7 + ceil_quot(reclen + 12, 32); | |
597 | sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; | |
598 | break; | |
599 | } | |
600 | } | |
601 | data->sector = sector; | |
602 | data->count = no_rec; | |
603 | switch (cmd) { | |
604 | case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: | |
605 | data->operation.orientation = 0x3; | |
606 | data->operation.operation = 0x03; | |
607 | break; | |
608 | case DASD_ECKD_CCW_READ_HOME_ADDRESS: | |
609 | data->operation.orientation = 0x3; | |
610 | data->operation.operation = 0x16; | |
611 | break; | |
612 | case DASD_ECKD_CCW_WRITE_RECORD_ZERO: | |
613 | data->operation.orientation = 0x1; | |
614 | data->operation.operation = 0x03; | |
615 | data->count++; | |
616 | break; | |
617 | case DASD_ECKD_CCW_READ_RECORD_ZERO: | |
618 | data->operation.orientation = 0x3; | |
619 | data->operation.operation = 0x16; | |
620 | data->count++; | |
621 | break; | |
622 | case DASD_ECKD_CCW_WRITE: | |
623 | case DASD_ECKD_CCW_WRITE_MT: | |
624 | case DASD_ECKD_CCW_WRITE_KD: | |
625 | case DASD_ECKD_CCW_WRITE_KD_MT: | |
626 | data->auxiliary.last_bytes_used = 0x1; | |
627 | data->length = reclen; | |
628 | data->operation.operation = 0x01; | |
629 | break; | |
630 | case DASD_ECKD_CCW_WRITE_CKD: | |
631 | case DASD_ECKD_CCW_WRITE_CKD_MT: | |
632 | data->auxiliary.last_bytes_used = 0x1; | |
633 | data->length = reclen; | |
634 | data->operation.operation = 0x03; | |
635 | break; | |
636 | case DASD_ECKD_CCW_READ: | |
637 | case DASD_ECKD_CCW_READ_MT: | |
638 | case DASD_ECKD_CCW_READ_KD: | |
639 | case DASD_ECKD_CCW_READ_KD_MT: | |
640 | data->auxiliary.last_bytes_used = 0x1; | |
641 | data->length = reclen; | |
642 | data->operation.operation = 0x06; | |
643 | break; | |
644 | case DASD_ECKD_CCW_READ_CKD: | |
645 | case DASD_ECKD_CCW_READ_CKD_MT: | |
646 | data->auxiliary.last_bytes_used = 0x1; | |
647 | data->length = reclen; | |
648 | data->operation.operation = 0x16; | |
649 | break; | |
650 | case DASD_ECKD_CCW_READ_COUNT: | |
651 | data->operation.operation = 0x06; | |
652 | break; | |
653 | case DASD_ECKD_CCW_ERASE: | |
654 | data->length = reclen; | |
655 | data->auxiliary.last_bytes_used = 0x1; | |
656 | data->operation.operation = 0x0b; | |
657 | break; | |
658 | default: | |
fc19f381 SH |
659 | DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record " |
660 | "opcode 0x%x", cmd); | |
1da177e4 | 661 | } |
b44b0ab3 SW |
662 | set_ch_t(&data->seek_addr, |
663 | trk / private->rdc_data.trk_per_cyl, | |
664 | trk % private->rdc_data.trk_per_cyl); | |
665 | data->search_arg.cyl = data->seek_addr.cyl; | |
666 | data->search_arg.head = data->seek_addr.head; | |
1da177e4 LT |
667 | data->search_arg.record = rec_on_trk; |
668 | } | |
669 | ||
670 | /* | |
671 | * Returns 1 if the block is one of the special blocks that needs | |
672 | * to get read/written with the KD variant of the command. | |
673 | * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and | |
674 | * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. | |
675 | * Luckily the KD variants differ only by one bit (0x08) from the | |
676 | * normal variant. So don't wonder about code like: | |
677 | * if (dasd_eckd_cdl_special(blk_per_trk, recid)) | |
678 | * ccw->cmd_code |= 0x8; | |
679 | */ | |
680 | static inline int | |
681 | dasd_eckd_cdl_special(int blk_per_trk, int recid) | |
682 | { | |
683 | if (recid < 3) | |
684 | return 1; | |
685 | if (recid < blk_per_trk) | |
686 | return 0; | |
687 | if (recid < 2 * blk_per_trk) | |
688 | return 1; | |
689 | return 0; | |
690 | } | |
691 | ||
692 | /* | |
693 | * Returns the record size for the special blocks of the cdl format. | |
694 | * Only returns something useful if dasd_eckd_cdl_special is true | |
695 | * for the recid. | |
696 | */ | |
697 | static inline int | |
698 | dasd_eckd_cdl_reclen(int recid) | |
699 | { | |
700 | if (recid < 3) | |
701 | return sizes_trk0[recid]; | |
702 | return LABEL_SIZE; | |
703 | } | |
b206181d SH |
704 | /* create unique id from private structure. */ |
705 | static void create_uid(struct dasd_eckd_private *private) | |
3d052595 | 706 | { |
4abb08c2 | 707 | int count; |
b206181d | 708 | struct dasd_uid *uid; |
3d052595 | 709 | |
2dedf0d9 | 710 | uid = &private->uid; |
3d052595 | 711 | memset(uid, 0, sizeof(struct dasd_uid)); |
4abb08c2 | 712 | memcpy(uid->vendor, private->ned->HDA_manufacturer, |
d0710c7c | 713 | sizeof(uid->vendor) - 1); |
3d052595 | 714 | EBCASC(uid->vendor, sizeof(uid->vendor) - 1); |
4abb08c2 | 715 | memcpy(uid->serial, private->ned->HDA_location, |
d0710c7c | 716 | sizeof(uid->serial) - 1); |
3d052595 | 717 | EBCASC(uid->serial, sizeof(uid->serial) - 1); |
4abb08c2 | 718 | uid->ssid = private->gneq->subsystemID; |
a419aef8 | 719 | uid->real_unit_addr = private->ned->unit_addr; |
4abb08c2 SW |
720 | if (private->sneq) { |
721 | uid->type = private->sneq->sua_flags; | |
8e09f215 | 722 | if (uid->type == UA_BASE_PAV_ALIAS) |
4abb08c2 | 723 | uid->base_unit_addr = private->sneq->base_unit_addr; |
8e09f215 SW |
724 | } else { |
725 | uid->type = UA_BASE_DEVICE; | |
726 | } | |
4abb08c2 SW |
727 | if (private->vdsneq) { |
728 | for (count = 0; count < 16; count++) { | |
729 | sprintf(uid->vduit+2*count, "%02x", | |
730 | private->vdsneq->uit[count]); | |
731 | } | |
732 | } | |
b206181d SH |
733 | } |
734 | ||
735 | /* | |
736 | * Generate device unique id that specifies the physical device. | |
737 | */ | |
738 | static int dasd_eckd_generate_uid(struct dasd_device *device) | |
739 | { | |
543691a4 | 740 | struct dasd_eckd_private *private = device->private; |
b206181d SH |
741 | unsigned long flags; |
742 | ||
b206181d SH |
743 | if (!private) |
744 | return -ENODEV; | |
745 | if (!private->ned || !private->gneq) | |
746 | return -ENODEV; | |
747 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); | |
748 | create_uid(private); | |
2dedf0d9 | 749 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
3d052595 HH |
750 | return 0; |
751 | } | |
752 | ||
2dedf0d9 SH |
753 | static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid) |
754 | { | |
543691a4 | 755 | struct dasd_eckd_private *private = device->private; |
2dedf0d9 SH |
756 | unsigned long flags; |
757 | ||
543691a4 | 758 | if (private) { |
2dedf0d9 SH |
759 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); |
760 | *uid = private->uid; | |
761 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); | |
762 | return 0; | |
763 | } | |
764 | return -EINVAL; | |
765 | } | |
766 | ||
b206181d SH |
767 | /* |
768 | * compare device UID with data of a given dasd_eckd_private structure | |
769 | * return 0 for match | |
770 | */ | |
771 | static int dasd_eckd_compare_path_uid(struct dasd_device *device, | |
772 | struct dasd_eckd_private *private) | |
773 | { | |
774 | struct dasd_uid device_uid; | |
775 | ||
776 | create_uid(private); | |
777 | dasd_eckd_get_uid(device, &device_uid); | |
778 | ||
779 | return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid)); | |
780 | } | |
781 | ||
a4d26c6a SW |
782 | static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device, |
783 | struct dasd_ccw_req *cqr, | |
784 | __u8 *rcd_buffer, | |
785 | __u8 lpm) | |
17283b56 | 786 | { |
17283b56 | 787 | struct ccw1 *ccw; |
a4d26c6a SW |
788 | /* |
789 | * buffer has to start with EBCDIC "V1.0" to show | |
790 | * support for virtual device SNEQ | |
791 | */ | |
792 | rcd_buffer[0] = 0xE5; | |
793 | rcd_buffer[1] = 0xF1; | |
794 | rcd_buffer[2] = 0x4B; | |
795 | rcd_buffer[3] = 0xF0; | |
17283b56 CH |
796 | |
797 | ccw = cqr->cpaddr; | |
a4d26c6a SW |
798 | ccw->cmd_code = DASD_ECKD_CCW_RCD; |
799 | ccw->flags = 0; | |
17283b56 | 800 | ccw->cda = (__u32)(addr_t)rcd_buffer; |
a4d26c6a SW |
801 | ccw->count = DASD_ECKD_RCD_DATA_SIZE; |
802 | cqr->magic = DASD_ECKD_MAGIC; | |
17283b56 | 803 | |
8e09f215 SW |
804 | cqr->startdev = device; |
805 | cqr->memdev = device; | |
806 | cqr->block = NULL; | |
17283b56 CH |
807 | cqr->expires = 10*HZ; |
808 | cqr->lpm = lpm; | |
eb6e199b | 809 | cqr->retries = 256; |
1aae0560 | 810 | cqr->buildclk = get_tod_clock(); |
17283b56 | 811 | cqr->status = DASD_CQR_FILLED; |
a4d26c6a SW |
812 | set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); |
813 | } | |
814 | ||
5915a873 SH |
815 | /* |
816 | * Wakeup helper for read_conf | |
817 | * if the cqr is not done and needs some error recovery | |
818 | * the buffer has to be re-initialized with the EBCDIC "V1.0" | |
819 | * to show support for virtual device SNEQ | |
820 | */ | |
821 | static void read_conf_cb(struct dasd_ccw_req *cqr, void *data) | |
822 | { | |
823 | struct ccw1 *ccw; | |
824 | __u8 *rcd_buffer; | |
825 | ||
826 | if (cqr->status != DASD_CQR_DONE) { | |
827 | ccw = cqr->cpaddr; | |
828 | rcd_buffer = (__u8 *)((addr_t) ccw->cda); | |
829 | memset(rcd_buffer, 0, sizeof(*rcd_buffer)); | |
830 | ||
831 | rcd_buffer[0] = 0xE5; | |
832 | rcd_buffer[1] = 0xF1; | |
833 | rcd_buffer[2] = 0x4B; | |
834 | rcd_buffer[3] = 0xF0; | |
835 | } | |
836 | dasd_wakeup_cb(cqr, data); | |
837 | } | |
838 | ||
a4d26c6a SW |
839 | static int dasd_eckd_read_conf_immediately(struct dasd_device *device, |
840 | struct dasd_ccw_req *cqr, | |
841 | __u8 *rcd_buffer, | |
842 | __u8 lpm) | |
843 | { | |
844 | struct ciw *ciw; | |
845 | int rc; | |
846 | /* | |
847 | * sanity check: scan for RCD command in extended SenseID data | |
848 | * some devices do not support RCD | |
849 | */ | |
850 | ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); | |
851 | if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) | |
852 | return -EOPNOTSUPP; | |
853 | ||
854 | dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm); | |
855 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); | |
5a27e60d | 856 | set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); |
a4d26c6a | 857 | cqr->retries = 5; |
5915a873 | 858 | cqr->callback = read_conf_cb; |
a4d26c6a SW |
859 | rc = dasd_sleep_on_immediatly(cqr); |
860 | return rc; | |
17283b56 CH |
861 | } |
862 | ||
863 | static int dasd_eckd_read_conf_lpm(struct dasd_device *device, | |
864 | void **rcd_buffer, | |
865 | int *rcd_buffer_size, __u8 lpm) | |
866 | { | |
867 | struct ciw *ciw; | |
868 | char *rcd_buf = NULL; | |
869 | int ret; | |
870 | struct dasd_ccw_req *cqr; | |
871 | ||
872 | /* | |
a4d26c6a SW |
873 | * sanity check: scan for RCD command in extended SenseID data |
874 | * some devices do not support RCD | |
17283b56 CH |
875 | */ |
876 | ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); | |
a4d26c6a | 877 | if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) { |
17283b56 CH |
878 | ret = -EOPNOTSUPP; |
879 | goto out_error; | |
880 | } | |
a4d26c6a | 881 | rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA); |
17283b56 CH |
882 | if (!rcd_buf) { |
883 | ret = -ENOMEM; | |
884 | goto out_error; | |
885 | } | |
a4d26c6a SW |
886 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, |
887 | 0, /* use rcd_buf as data ara */ | |
888 | device); | |
17283b56 | 889 | if (IS_ERR(cqr)) { |
a4d26c6a SW |
890 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
891 | "Could not allocate RCD request"); | |
892 | ret = -ENOMEM; | |
17283b56 CH |
893 | goto out_error; |
894 | } | |
a4d26c6a | 895 | dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm); |
5915a873 | 896 | cqr->callback = read_conf_cb; |
17283b56 CH |
897 | ret = dasd_sleep_on(cqr); |
898 | /* | |
899 | * on success we update the user input parms | |
900 | */ | |
8e09f215 | 901 | dasd_sfree_request(cqr, cqr->memdev); |
17283b56 CH |
902 | if (ret) |
903 | goto out_error; | |
904 | ||
a4d26c6a | 905 | *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE; |
17283b56 CH |
906 | *rcd_buffer = rcd_buf; |
907 | return 0; | |
908 | out_error: | |
909 | kfree(rcd_buf); | |
910 | *rcd_buffer = NULL; | |
911 | *rcd_buffer_size = 0; | |
912 | return ret; | |
913 | } | |
914 | ||
4abb08c2 SW |
915 | static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) |
916 | { | |
917 | ||
918 | struct dasd_sneq *sneq; | |
919 | int i, count; | |
920 | ||
921 | private->ned = NULL; | |
922 | private->sneq = NULL; | |
923 | private->vdsneq = NULL; | |
924 | private->gneq = NULL; | |
925 | count = private->conf_len / sizeof(struct dasd_sneq); | |
926 | sneq = (struct dasd_sneq *)private->conf_data; | |
927 | for (i = 0; i < count; ++i) { | |
928 | if (sneq->flags.identifier == 1 && sneq->format == 1) | |
929 | private->sneq = sneq; | |
930 | else if (sneq->flags.identifier == 1 && sneq->format == 4) | |
931 | private->vdsneq = (struct vd_sneq *)sneq; | |
932 | else if (sneq->flags.identifier == 2) | |
933 | private->gneq = (struct dasd_gneq *)sneq; | |
934 | else if (sneq->flags.identifier == 3 && sneq->res1 == 1) | |
935 | private->ned = (struct dasd_ned *)sneq; | |
936 | sneq++; | |
937 | } | |
938 | if (!private->ned || !private->gneq) { | |
939 | private->ned = NULL; | |
940 | private->sneq = NULL; | |
941 | private->vdsneq = NULL; | |
942 | private->gneq = NULL; | |
943 | return -EINVAL; | |
944 | } | |
945 | return 0; | |
946 | ||
947 | }; | |
948 | ||
949 | static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) | |
950 | { | |
951 | struct dasd_gneq *gneq; | |
952 | int i, count, found; | |
953 | ||
954 | count = conf_len / sizeof(*gneq); | |
955 | gneq = (struct dasd_gneq *)conf_data; | |
956 | found = 0; | |
957 | for (i = 0; i < count; ++i) { | |
958 | if (gneq->flags.identifier == 2) { | |
959 | found = 1; | |
960 | break; | |
961 | } | |
962 | gneq++; | |
963 | } | |
964 | if (found) | |
965 | return ((char *)gneq)[18] & 0x07; | |
966 | else | |
967 | return 0; | |
968 | } | |
969 | ||
c7c0c9de SH |
970 | static void dasd_eckd_clear_conf_data(struct dasd_device *device) |
971 | { | |
543691a4 | 972 | struct dasd_eckd_private *private = device->private; |
c7c0c9de SH |
973 | int i; |
974 | ||
c7c0c9de SH |
975 | private->conf_data = NULL; |
976 | private->conf_len = 0; | |
977 | for (i = 0; i < 8; i++) { | |
c9346151 SH |
978 | kfree(device->path[i].conf_data); |
979 | device->path[i].conf_data = NULL; | |
a521b048 SH |
980 | device->path[i].cssid = 0; |
981 | device->path[i].ssid = 0; | |
982 | device->path[i].chpid = 0; | |
c7c0c9de SH |
983 | } |
984 | } | |
985 | ||
986 | ||
4abb08c2 | 987 | static int dasd_eckd_read_conf(struct dasd_device *device) |
1da177e4 LT |
988 | { |
989 | void *conf_data; | |
990 | int conf_len, conf_data_saved; | |
b179b037 | 991 | int rc, path_err, pos; |
a4d26c6a | 992 | __u8 lpm, opm; |
b206181d | 993 | struct dasd_eckd_private *private, path_private; |
b206181d SH |
994 | struct dasd_uid *uid; |
995 | char print_path_uid[60], print_device_uid[60]; | |
a521b048 SH |
996 | struct channel_path_desc *chp_desc; |
997 | struct subchannel_id sch_id; | |
1da177e4 | 998 | |
543691a4 | 999 | private = device->private; |
a4d26c6a | 1000 | opm = ccw_device_get_path_mask(device->cdev); |
a521b048 | 1001 | ccw_device_get_schid(device->cdev, &sch_id); |
1da177e4 | 1002 | conf_data_saved = 0; |
55d3a85c | 1003 | path_err = 0; |
1da177e4 LT |
1004 | /* get configuration data per operational path */ |
1005 | for (lpm = 0x80; lpm; lpm>>= 1) { | |
b206181d SH |
1006 | if (!(lpm & opm)) |
1007 | continue; | |
1008 | rc = dasd_eckd_read_conf_lpm(device, &conf_data, | |
1009 | &conf_len, lpm); | |
1010 | if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ | |
1011 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, | |
1012 | "Read configuration data returned " | |
1013 | "error %d", rc); | |
1014 | return rc; | |
1015 | } | |
1016 | if (conf_data == NULL) { | |
1017 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
1018 | "No configuration data " | |
1019 | "retrieved"); | |
1020 | /* no further analysis possible */ | |
c9346151 | 1021 | dasd_path_add_opm(device, opm); |
b206181d SH |
1022 | continue; /* no error */ |
1023 | } | |
1024 | /* save first valid configuration data */ | |
1025 | if (!conf_data_saved) { | |
c7c0c9de SH |
1026 | /* initially clear previously stored conf_data */ |
1027 | dasd_eckd_clear_conf_data(device); | |
b206181d SH |
1028 | private->conf_data = conf_data; |
1029 | private->conf_len = conf_len; | |
1030 | if (dasd_eckd_identify_conf_parts(private)) { | |
1031 | private->conf_data = NULL; | |
1032 | private->conf_len = 0; | |
1033 | kfree(conf_data); | |
1034 | continue; | |
1da177e4 | 1035 | } |
c7c0c9de SH |
1036 | pos = pathmask_to_pos(lpm); |
1037 | /* store per path conf_data */ | |
c9346151 | 1038 | device->path[pos].conf_data = conf_data; |
a521b048 SH |
1039 | device->path[pos].cssid = sch_id.cssid; |
1040 | device->path[pos].ssid = sch_id.ssid; | |
1041 | chp_desc = ccw_device_get_chp_desc(device->cdev, pos); | |
1042 | if (chp_desc) | |
1043 | device->path[pos].chpid = chp_desc->chpid; | |
1044 | kfree(chp_desc); | |
b206181d SH |
1045 | /* |
1046 | * build device UID that other path data | |
1047 | * can be compared to it | |
1048 | */ | |
1049 | dasd_eckd_generate_uid(device); | |
1050 | conf_data_saved++; | |
1051 | } else { | |
1052 | path_private.conf_data = conf_data; | |
1053 | path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; | |
1054 | if (dasd_eckd_identify_conf_parts( | |
1055 | &path_private)) { | |
1056 | path_private.conf_data = NULL; | |
1057 | path_private.conf_len = 0; | |
1058 | kfree(conf_data); | |
1059 | continue; | |
1da177e4 | 1060 | } |
b206181d SH |
1061 | if (dasd_eckd_compare_path_uid( |
1062 | device, &path_private)) { | |
1063 | uid = &path_private.uid; | |
1064 | if (strlen(uid->vduit) > 0) | |
1065 | snprintf(print_path_uid, | |
1066 | sizeof(print_path_uid), | |
1067 | "%s.%s.%04x.%02x.%s", | |
1068 | uid->vendor, uid->serial, | |
1069 | uid->ssid, uid->real_unit_addr, | |
1070 | uid->vduit); | |
1071 | else | |
1072 | snprintf(print_path_uid, | |
1073 | sizeof(print_path_uid), | |
1074 | "%s.%s.%04x.%02x", | |
1075 | uid->vendor, uid->serial, | |
1076 | uid->ssid, | |
1077 | uid->real_unit_addr); | |
1078 | uid = &private->uid; | |
1079 | if (strlen(uid->vduit) > 0) | |
1080 | snprintf(print_device_uid, | |
1081 | sizeof(print_device_uid), | |
1082 | "%s.%s.%04x.%02x.%s", | |
1083 | uid->vendor, uid->serial, | |
1084 | uid->ssid, uid->real_unit_addr, | |
1085 | uid->vduit); | |
1086 | else | |
1087 | snprintf(print_device_uid, | |
1088 | sizeof(print_device_uid), | |
1089 | "%s.%s.%04x.%02x", | |
1090 | uid->vendor, uid->serial, | |
1091 | uid->ssid, | |
1092 | uid->real_unit_addr); | |
1093 | dev_err(&device->cdev->dev, | |
1094 | "Not all channel paths lead to " | |
1095 | "the same device, path %02X leads to " | |
1096 | "device %s instead of %s\n", lpm, | |
1097 | print_path_uid, print_device_uid); | |
55d3a85c | 1098 | path_err = -EINVAL; |
c9346151 | 1099 | dasd_path_add_cablepm(device, lpm); |
55d3a85c | 1100 | continue; |
1da177e4 | 1101 | } |
c7c0c9de SH |
1102 | pos = pathmask_to_pos(lpm); |
1103 | /* store per path conf_data */ | |
c9346151 | 1104 | device->path[pos].conf_data = conf_data; |
a521b048 SH |
1105 | device->path[pos].cssid = sch_id.cssid; |
1106 | device->path[pos].ssid = sch_id.ssid; | |
1107 | chp_desc = ccw_device_get_chp_desc(device->cdev, pos); | |
1108 | if (chp_desc) | |
1109 | device->path[pos].chpid = chp_desc->chpid; | |
1110 | kfree(chp_desc); | |
b206181d SH |
1111 | path_private.conf_data = NULL; |
1112 | path_private.conf_len = 0; | |
1113 | } | |
1114 | switch (dasd_eckd_path_access(conf_data, conf_len)) { | |
1115 | case 0x02: | |
c9346151 | 1116 | dasd_path_add_nppm(device, lpm); |
b206181d SH |
1117 | break; |
1118 | case 0x03: | |
c9346151 | 1119 | dasd_path_add_ppm(device, lpm); |
b206181d | 1120 | break; |
1da177e4 | 1121 | } |
c9346151 SH |
1122 | if (!dasd_path_get_opm(device)) { |
1123 | dasd_path_set_opm(device, lpm); | |
ccc0e7dc SH |
1124 | dasd_generic_path_operational(device); |
1125 | } else { | |
c9346151 | 1126 | dasd_path_add_opm(device, lpm); |
ccc0e7dc | 1127 | } |
1da177e4 | 1128 | } |
b206181d | 1129 | |
55d3a85c | 1130 | return path_err; |
1da177e4 LT |
1131 | } |
1132 | ||
a521b048 SH |
1133 | static u32 get_fcx_max_data(struct dasd_device *device) |
1134 | { | |
1135 | struct dasd_eckd_private *private = device->private; | |
1136 | int fcx_in_css, fcx_in_gneq, fcx_in_features; | |
1137 | int tpm, mdc; | |
1138 | ||
1139 | if (dasd_nofcx) | |
1140 | return 0; | |
1141 | /* is transport mode supported? */ | |
1142 | fcx_in_css = css_general_characteristics.fcx; | |
1143 | fcx_in_gneq = private->gneq->reserved2[7] & 0x04; | |
1144 | fcx_in_features = private->features.feature[40] & 0x80; | |
1145 | tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; | |
1146 | ||
1147 | if (!tpm) | |
1148 | return 0; | |
1149 | ||
1150 | mdc = ccw_device_get_mdc(device->cdev, 0); | |
1151 | if (mdc < 0) { | |
1152 | dev_warn(&device->cdev->dev, "Detecting the maximum supported data size for zHPF requests failed\n"); | |
1153 | return 0; | |
1154 | } else { | |
1155 | return (u32)mdc * FCX_MAX_DATA_FACTOR; | |
1156 | } | |
1157 | } | |
1158 | ||
a4d26c6a SW |
1159 | static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) |
1160 | { | |
543691a4 | 1161 | struct dasd_eckd_private *private = device->private; |
a4d26c6a SW |
1162 | int mdc; |
1163 | u32 fcx_max_data; | |
1164 | ||
a4d26c6a SW |
1165 | if (private->fcx_max_data) { |
1166 | mdc = ccw_device_get_mdc(device->cdev, lpm); | |
1167 | if ((mdc < 0)) { | |
1168 | dev_warn(&device->cdev->dev, | |
1169 | "Detecting the maximum data size for zHPF " | |
1170 | "requests failed (rc=%d) for a new path %x\n", | |
1171 | mdc, lpm); | |
1172 | return mdc; | |
1173 | } | |
0f02c4e7 | 1174 | fcx_max_data = (u32)mdc * FCX_MAX_DATA_FACTOR; |
a4d26c6a SW |
1175 | if (fcx_max_data < private->fcx_max_data) { |
1176 | dev_warn(&device->cdev->dev, | |
1177 | "The maximum data size for zHPF requests %u " | |
1178 | "on a new path %x is below the active maximum " | |
1179 | "%u\n", fcx_max_data, lpm, | |
1180 | private->fcx_max_data); | |
1181 | return -EACCES; | |
1182 | } | |
1183 | } | |
1184 | return 0; | |
1185 | } | |
1186 | ||
b206181d SH |
1187 | static int rebuild_device_uid(struct dasd_device *device, |
1188 | struct path_verification_work_data *data) | |
1189 | { | |
543691a4 | 1190 | struct dasd_eckd_private *private = device->private; |
c9346151 | 1191 | __u8 lpm, opm = dasd_path_get_opm(device); |
543691a4 | 1192 | int rc = -ENODEV; |
b206181d SH |
1193 | |
1194 | for (lpm = 0x80; lpm; lpm >>= 1) { | |
1195 | if (!(lpm & opm)) | |
1196 | continue; | |
1197 | memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); | |
1198 | memset(&data->cqr, 0, sizeof(data->cqr)); | |
1199 | data->cqr.cpaddr = &data->ccw; | |
1200 | rc = dasd_eckd_read_conf_immediately(device, &data->cqr, | |
1201 | data->rcd_buffer, | |
1202 | lpm); | |
1203 | ||
1204 | if (rc) { | |
1205 | if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */ | |
1206 | continue; | |
1207 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, | |
1208 | "Read configuration data " | |
1209 | "returned error %d", rc); | |
1210 | break; | |
1211 | } | |
1212 | memcpy(private->conf_data, data->rcd_buffer, | |
1213 | DASD_ECKD_RCD_DATA_SIZE); | |
1214 | if (dasd_eckd_identify_conf_parts(private)) { | |
1215 | rc = -ENODEV; | |
1216 | } else /* first valid path is enough */ | |
1217 | break; | |
1218 | } | |
1219 | ||
1220 | if (!rc) | |
1221 | rc = dasd_eckd_generate_uid(device); | |
1222 | ||
1223 | return rc; | |
1224 | } | |
1225 | ||
a4d26c6a SW |
1226 | static void do_path_verification_work(struct work_struct *work) |
1227 | { | |
1228 | struct path_verification_work_data *data; | |
1229 | struct dasd_device *device; | |
b206181d SH |
1230 | struct dasd_eckd_private path_private; |
1231 | struct dasd_uid *uid; | |
1232 | __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; | |
5db8440c | 1233 | __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm; |
a4d26c6a | 1234 | unsigned long flags; |
b206181d | 1235 | char print_uid[60]; |
a4d26c6a SW |
1236 | int rc; |
1237 | ||
1238 | data = container_of(work, struct path_verification_work_data, worker); | |
1239 | device = data->device; | |
1240 | ||
c8d1c0ff SH |
1241 | /* delay path verification until device was resumed */ |
1242 | if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { | |
1243 | schedule_work(work); | |
1244 | return; | |
1245 | } | |
1eb38023 SH |
1246 | /* check if path verification already running and delay if so */ |
1247 | if (test_and_set_bit(DASD_FLAG_PATH_VERIFY, &device->flags)) { | |
1248 | schedule_work(work); | |
1249 | return; | |
1250 | } | |
a4d26c6a SW |
1251 | opm = 0; |
1252 | npm = 0; | |
1253 | ppm = 0; | |
1254 | epm = 0; | |
5db8440c SH |
1255 | hpfpm = 0; |
1256 | cablepm = 0; | |
1257 | ||
a4d26c6a | 1258 | for (lpm = 0x80; lpm; lpm >>= 1) { |
b206181d SH |
1259 | if (!(lpm & data->tbvpm)) |
1260 | continue; | |
1261 | memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); | |
1262 | memset(&data->cqr, 0, sizeof(data->cqr)); | |
1263 | data->cqr.cpaddr = &data->ccw; | |
1264 | rc = dasd_eckd_read_conf_immediately(device, &data->cqr, | |
1265 | data->rcd_buffer, | |
1266 | lpm); | |
1267 | if (!rc) { | |
1268 | switch (dasd_eckd_path_access(data->rcd_buffer, | |
1269 | DASD_ECKD_RCD_DATA_SIZE) | |
1270 | ) { | |
1271 | case 0x02: | |
1272 | npm |= lpm; | |
1273 | break; | |
1274 | case 0x03: | |
1275 | ppm |= lpm; | |
1276 | break; | |
1277 | } | |
1278 | opm |= lpm; | |
1279 | } else if (rc == -EOPNOTSUPP) { | |
1280 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
1281 | "path verification: No configuration " | |
1282 | "data retrieved"); | |
1283 | opm |= lpm; | |
1284 | } else if (rc == -EAGAIN) { | |
1285 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
a4d26c6a SW |
1286 | "path verification: device is stopped," |
1287 | " try again later"); | |
b206181d SH |
1288 | epm |= lpm; |
1289 | } else { | |
1290 | dev_warn(&device->cdev->dev, | |
1291 | "Reading device feature codes failed " | |
1292 | "(rc=%d) for new path %x\n", rc, lpm); | |
1293 | continue; | |
1294 | } | |
1295 | if (verify_fcx_max_data(device, lpm)) { | |
1296 | opm &= ~lpm; | |
1297 | npm &= ~lpm; | |
1298 | ppm &= ~lpm; | |
5db8440c | 1299 | hpfpm |= lpm; |
b206181d SH |
1300 | continue; |
1301 | } | |
1302 | ||
1303 | /* | |
1304 | * save conf_data for comparison after | |
1305 | * rebuild_device_uid may have changed | |
1306 | * the original data | |
1307 | */ | |
1308 | memcpy(&path_rcd_buf, data->rcd_buffer, | |
1309 | DASD_ECKD_RCD_DATA_SIZE); | |
1310 | path_private.conf_data = (void *) &path_rcd_buf; | |
1311 | path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; | |
1312 | if (dasd_eckd_identify_conf_parts(&path_private)) { | |
1313 | path_private.conf_data = NULL; | |
1314 | path_private.conf_len = 0; | |
1315 | continue; | |
1316 | } | |
1317 | ||
1318 | /* | |
1319 | * compare path UID with device UID only if at least | |
1320 | * one valid path is left | |
1321 | * in other case the device UID may have changed and | |
1322 | * the first working path UID will be used as device UID | |
1323 | */ | |
c9346151 | 1324 | if (dasd_path_get_opm(device) && |
b206181d SH |
1325 | dasd_eckd_compare_path_uid(device, &path_private)) { |
1326 | /* | |
1327 | * the comparison was not successful | |
1328 | * rebuild the device UID with at least one | |
1329 | * known path in case a z/VM hyperswap command | |
1330 | * has changed the device | |
1331 | * | |
1332 | * after this compare again | |
1333 | * | |
1334 | * if either the rebuild or the recompare fails | |
1335 | * the path can not be used | |
1336 | */ | |
1337 | if (rebuild_device_uid(device, data) || | |
1338 | dasd_eckd_compare_path_uid( | |
1339 | device, &path_private)) { | |
1340 | uid = &path_private.uid; | |
1341 | if (strlen(uid->vduit) > 0) | |
1342 | snprintf(print_uid, sizeof(print_uid), | |
1343 | "%s.%s.%04x.%02x.%s", | |
1344 | uid->vendor, uid->serial, | |
1345 | uid->ssid, uid->real_unit_addr, | |
1346 | uid->vduit); | |
1347 | else | |
1348 | snprintf(print_uid, sizeof(print_uid), | |
1349 | "%s.%s.%04x.%02x", | |
1350 | uid->vendor, uid->serial, | |
1351 | uid->ssid, | |
1352 | uid->real_unit_addr); | |
1353 | dev_err(&device->cdev->dev, | |
1354 | "The newly added channel path %02X " | |
1355 | "will not be used because it leads " | |
1356 | "to a different device %s\n", | |
1357 | lpm, print_uid); | |
a4d26c6a SW |
1358 | opm &= ~lpm; |
1359 | npm &= ~lpm; | |
1360 | ppm &= ~lpm; | |
5db8440c | 1361 | cablepm |= lpm; |
b206181d | 1362 | continue; |
a4d26c6a SW |
1363 | } |
1364 | } | |
b206181d SH |
1365 | |
1366 | /* | |
1367 | * There is a small chance that a path is lost again between | |
1368 | * above path verification and the following modification of | |
1369 | * the device opm mask. We could avoid that race here by using | |
1370 | * yet another path mask, but we rather deal with this unlikely | |
1371 | * situation in dasd_start_IO. | |
1372 | */ | |
1373 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); | |
c9346151 SH |
1374 | if (!dasd_path_get_opm(device) && opm) { |
1375 | dasd_path_set_opm(device, opm); | |
b206181d | 1376 | dasd_generic_path_operational(device); |
5db8440c | 1377 | } else { |
c9346151 | 1378 | dasd_path_add_opm(device, opm); |
5db8440c | 1379 | } |
c9346151 SH |
1380 | dasd_path_add_nppm(device, npm); |
1381 | dasd_path_add_ppm(device, ppm); | |
1382 | dasd_path_add_tbvpm(device, epm); | |
1383 | dasd_path_add_cablepm(device, cablepm); | |
1384 | dasd_path_add_nohpfpm(device, hpfpm); | |
b206181d | 1385 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
a4d26c6a | 1386 | } |
1eb38023 | 1387 | clear_bit(DASD_FLAG_PATH_VERIFY, &device->flags); |
a4d26c6a SW |
1388 | dasd_put_device(device); |
1389 | if (data->isglobal) | |
1390 | mutex_unlock(&dasd_path_verification_mutex); | |
1391 | else | |
1392 | kfree(data); | |
1393 | } | |
1394 | ||
1395 | static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm) | |
1396 | { | |
1397 | struct path_verification_work_data *data; | |
1398 | ||
1399 | data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); | |
1400 | if (!data) { | |
1401 | if (mutex_trylock(&dasd_path_verification_mutex)) { | |
1402 | data = path_verification_worker; | |
1403 | data->isglobal = 1; | |
1404 | } else | |
1405 | return -ENOMEM; | |
1406 | } else { | |
1407 | memset(data, 0, sizeof(*data)); | |
1408 | data->isglobal = 0; | |
1409 | } | |
1410 | INIT_WORK(&data->worker, do_path_verification_work); | |
1411 | dasd_get_device(device); | |
1412 | data->device = device; | |
1413 | data->tbvpm = lpm; | |
1414 | schedule_work(&data->worker); | |
1415 | return 0; | |
1416 | } | |
1417 | ||
a521b048 SH |
1418 | static void dasd_eckd_reset_path(struct dasd_device *device, __u8 pm) |
1419 | { | |
1420 | struct dasd_eckd_private *private = device->private; | |
1421 | unsigned long flags; | |
1422 | ||
1423 | if (!private->fcx_max_data) | |
1424 | private->fcx_max_data = get_fcx_max_data(device); | |
1425 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); | |
1426 | dasd_path_set_tbvpm(device, pm ? : dasd_path_get_notoperpm(device)); | |
1427 | dasd_schedule_device_bh(device); | |
1428 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); | |
1429 | } | |
1430 | ||
8e09f215 SW |
1431 | static int dasd_eckd_read_features(struct dasd_device *device) |
1432 | { | |
543691a4 | 1433 | struct dasd_eckd_private *private = device->private; |
8e09f215 SW |
1434 | struct dasd_psf_prssd_data *prssdp; |
1435 | struct dasd_rssd_features *features; | |
1436 | struct dasd_ccw_req *cqr; | |
1437 | struct ccw1 *ccw; | |
1438 | int rc; | |
8e09f215 | 1439 | |
68d1e5f0 | 1440 | memset(&private->features, 0, sizeof(struct dasd_rssd_features)); |
68b781fe | 1441 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, |
8e09f215 SW |
1442 | (sizeof(struct dasd_psf_prssd_data) + |
1443 | sizeof(struct dasd_rssd_features)), | |
1444 | device); | |
1445 | if (IS_ERR(cqr)) { | |
b8ed5dd5 SH |
1446 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " |
1447 | "allocate initialization request"); | |
8e09f215 SW |
1448 | return PTR_ERR(cqr); |
1449 | } | |
1450 | cqr->startdev = device; | |
1451 | cqr->memdev = device; | |
1452 | cqr->block = NULL; | |
eb6e199b | 1453 | cqr->retries = 256; |
8e09f215 SW |
1454 | cqr->expires = 10 * HZ; |
1455 | ||
1456 | /* Prepare for Read Subsystem Data */ | |
1457 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
1458 | memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); | |
1459 | prssdp->order = PSF_ORDER_PRSSD; | |
1460 | prssdp->suborder = 0x41; /* Read Feature Codes */ | |
1461 | /* all other bytes of prssdp must be zero */ | |
1462 | ||
1463 | ccw = cqr->cpaddr; | |
1464 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
1465 | ccw->count = sizeof(struct dasd_psf_prssd_data); | |
1466 | ccw->flags |= CCW_FLAG_CC; | |
1467 | ccw->cda = (__u32)(addr_t) prssdp; | |
1468 | ||
1469 | /* Read Subsystem Data - feature codes */ | |
1470 | features = (struct dasd_rssd_features *) (prssdp + 1); | |
1471 | memset(features, 0, sizeof(struct dasd_rssd_features)); | |
1472 | ||
1473 | ccw++; | |
1474 | ccw->cmd_code = DASD_ECKD_CCW_RSSD; | |
1475 | ccw->count = sizeof(struct dasd_rssd_features); | |
1476 | ccw->cda = (__u32)(addr_t) features; | |
1477 | ||
1aae0560 | 1478 | cqr->buildclk = get_tod_clock(); |
8e09f215 SW |
1479 | cqr->status = DASD_CQR_FILLED; |
1480 | rc = dasd_sleep_on(cqr); | |
1481 | if (rc == 0) { | |
1482 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
1483 | features = (struct dasd_rssd_features *) (prssdp + 1); | |
1484 | memcpy(&private->features, features, | |
1485 | sizeof(struct dasd_rssd_features)); | |
68d1e5f0 SW |
1486 | } else |
1487 | dev_warn(&device->cdev->dev, "Reading device feature codes" | |
1488 | " failed with rc=%d\n", rc); | |
8e09f215 SW |
1489 | dasd_sfree_request(cqr, cqr->memdev); |
1490 | return rc; | |
1491 | } | |
1492 | ||
1493 | ||
40545573 HH |
1494 | /* |
1495 | * Build CP for Perform Subsystem Function - SSC. | |
1496 | */ | |
f3eb5384 SW |
1497 | static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, |
1498 | int enable_pav) | |
40545573 | 1499 | { |
8e09f215 SW |
1500 | struct dasd_ccw_req *cqr; |
1501 | struct dasd_psf_ssc_data *psf_ssc_data; | |
1502 | struct ccw1 *ccw; | |
40545573 | 1503 | |
68b781fe | 1504 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , |
40545573 HH |
1505 | sizeof(struct dasd_psf_ssc_data), |
1506 | device); | |
1507 | ||
8e09f215 | 1508 | if (IS_ERR(cqr)) { |
fc19f381 | 1509 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
40545573 | 1510 | "Could not allocate PSF-SSC request"); |
8e09f215 SW |
1511 | return cqr; |
1512 | } | |
1513 | psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; | |
1514 | psf_ssc_data->order = PSF_ORDER_SSC; | |
626350b6 | 1515 | psf_ssc_data->suborder = 0xc0; |
f3eb5384 | 1516 | if (enable_pav) { |
626350b6 | 1517 | psf_ssc_data->suborder |= 0x08; |
f3eb5384 SW |
1518 | psf_ssc_data->reserved[0] = 0x88; |
1519 | } | |
8e09f215 SW |
1520 | ccw = cqr->cpaddr; |
1521 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
1522 | ccw->cda = (__u32)(addr_t)psf_ssc_data; | |
1523 | ccw->count = 66; | |
1524 | ||
1525 | cqr->startdev = device; | |
1526 | cqr->memdev = device; | |
1527 | cqr->block = NULL; | |
eb6e199b | 1528 | cqr->retries = 256; |
8e09f215 | 1529 | cqr->expires = 10*HZ; |
1aae0560 | 1530 | cqr->buildclk = get_tod_clock(); |
8e09f215 SW |
1531 | cqr->status = DASD_CQR_FILLED; |
1532 | return cqr; | |
40545573 HH |
1533 | } |
1534 | ||
1535 | /* | |
1536 | * Perform Subsystem Function. | |
1537 | * It is necessary to trigger CIO for channel revalidation since this | |
1538 | * call might change behaviour of DASD devices. | |
1539 | */ | |
1540 | static int | |
12d7b107 SH |
1541 | dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav, |
1542 | unsigned long flags) | |
40545573 | 1543 | { |
8e09f215 SW |
1544 | struct dasd_ccw_req *cqr; |
1545 | int rc; | |
1546 | ||
f3eb5384 | 1547 | cqr = dasd_eckd_build_psf_ssc(device, enable_pav); |
8e09f215 SW |
1548 | if (IS_ERR(cqr)) |
1549 | return PTR_ERR(cqr); | |
1550 | ||
12d7b107 SH |
1551 | /* |
1552 | * set flags e.g. turn on failfast, to prevent blocking | |
1553 | * the calling function should handle failed requests | |
1554 | */ | |
1555 | cqr->flags |= flags; | |
1556 | ||
8e09f215 SW |
1557 | rc = dasd_sleep_on(cqr); |
1558 | if (!rc) | |
1559 | /* trigger CIO to reprobe devices */ | |
1560 | css_schedule_reprobe(); | |
12d7b107 SH |
1561 | else if (cqr->intrc == -EAGAIN) |
1562 | rc = -EAGAIN; | |
1563 | ||
8e09f215 SW |
1564 | dasd_sfree_request(cqr, cqr->memdev); |
1565 | return rc; | |
40545573 HH |
1566 | } |
1567 | ||
1568 | /* | |
1569 | * Valide storage server of current device. | |
1570 | */ | |
12d7b107 SH |
1571 | static int dasd_eckd_validate_server(struct dasd_device *device, |
1572 | unsigned long flags) | |
40545573 | 1573 | { |
543691a4 SO |
1574 | struct dasd_eckd_private *private = device->private; |
1575 | int enable_pav, rc; | |
40545573 | 1576 | |
f9f8d02f SH |
1577 | if (private->uid.type == UA_BASE_PAV_ALIAS || |
1578 | private->uid.type == UA_HYPER_PAV_ALIAS) | |
12d7b107 | 1579 | return 0; |
40545573 | 1580 | if (dasd_nopav || MACHINE_IS_VM) |
f3eb5384 SW |
1581 | enable_pav = 0; |
1582 | else | |
1583 | enable_pav = 1; | |
12d7b107 | 1584 | rc = dasd_eckd_psf_ssc(device, enable_pav, flags); |
eb6e199b | 1585 | |
8e79a441 HH |
1586 | /* may be requested feature is not available on server, |
1587 | * therefore just report error and go ahead */ | |
b8ed5dd5 SH |
1588 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " |
1589 | "returned rc=%d", private->uid.ssid, rc); | |
12d7b107 | 1590 | return rc; |
40545573 HH |
1591 | } |
1592 | ||
f1633031 SH |
1593 | /* |
1594 | * worker to do a validate server in case of a lost pathgroup | |
1595 | */ | |
1596 | static void dasd_eckd_do_validate_server(struct work_struct *work) | |
1597 | { | |
1598 | struct dasd_device *device = container_of(work, struct dasd_device, | |
1599 | kick_validate); | |
ea4da6ea SH |
1600 | unsigned long flags = 0; |
1601 | ||
1602 | set_bit(DASD_CQR_FLAGS_FAILFAST, &flags); | |
1603 | if (dasd_eckd_validate_server(device, flags) | |
12d7b107 SH |
1604 | == -EAGAIN) { |
1605 | /* schedule worker again if failed */ | |
1606 | schedule_work(&device->kick_validate); | |
1607 | return; | |
1608 | } | |
1609 | ||
f1633031 SH |
1610 | dasd_put_device(device); |
1611 | } | |
1612 | ||
1613 | static void dasd_eckd_kick_validate_server(struct dasd_device *device) | |
1614 | { | |
1615 | dasd_get_device(device); | |
25e2cf1c SH |
1616 | /* exit if device not online or in offline processing */ |
1617 | if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || | |
1618 | device->state < DASD_STATE_ONLINE) { | |
1619 | dasd_put_device(device); | |
1620 | return; | |
1621 | } | |
f1633031 | 1622 | /* queue call to do_validate_server to the kernel event daemon. */ |
f2608cd4 SH |
1623 | if (!schedule_work(&device->kick_validate)) |
1624 | dasd_put_device(device); | |
f1633031 SH |
1625 | } |
1626 | ||
3d052595 HH |
1627 | /* |
1628 | * Check device characteristics. | |
1629 | * If the device is accessible using ECKD discipline, the device is enabled. | |
1630 | */ | |
1da177e4 LT |
1631 | static int |
1632 | dasd_eckd_check_characteristics(struct dasd_device *device) | |
1633 | { | |
543691a4 | 1634 | struct dasd_eckd_private *private = device->private; |
8e09f215 | 1635 | struct dasd_block *block; |
2dedf0d9 | 1636 | struct dasd_uid temp_uid; |
f9f8d02f | 1637 | int rc, i; |
33b62a30 | 1638 | int readonly; |
7c8faa86 | 1639 | unsigned long value; |
1da177e4 | 1640 | |
f1633031 SH |
1641 | /* setup work queue for validate server*/ |
1642 | INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); | |
59a9ed5f SH |
1643 | /* setup work queue for summary unit check */ |
1644 | INIT_WORK(&device->suc_work, dasd_alias_handle_summary_unit_check); | |
f1633031 | 1645 | |
454e1fa1 PO |
1646 | if (!ccw_device_is_pathgroup(device->cdev)) { |
1647 | dev_warn(&device->cdev->dev, | |
1648 | "A channel path group could not be established\n"); | |
1649 | return -EIO; | |
1650 | } | |
1651 | if (!ccw_device_is_multipath(device->cdev)) { | |
1652 | dev_info(&device->cdev->dev, | |
1653 | "The DASD is not operating in multipath mode\n"); | |
1654 | } | |
92636b15 SO |
1655 | if (!private) { |
1656 | private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); | |
1657 | if (!private) { | |
fc19f381 SH |
1658 | dev_warn(&device->cdev->dev, |
1659 | "Allocating memory for private DASD data " | |
1660 | "failed\n"); | |
1da177e4 LT |
1661 | return -ENOMEM; |
1662 | } | |
543691a4 | 1663 | device->private = private; |
92636b15 SO |
1664 | } else { |
1665 | memset(private, 0, sizeof(*private)); | |
1da177e4 LT |
1666 | } |
1667 | /* Invalidate status of initial analysis. */ | |
1668 | private->init_cqr_status = -1; | |
1669 | /* Set default cache operations. */ | |
1670 | private->attrib.operation = DASD_NORMAL_CACHE; | |
1671 | private->attrib.nr_cyl = 0; | |
1672 | ||
40545573 HH |
1673 | /* Read Configuration Data */ |
1674 | rc = dasd_eckd_read_conf(device); | |
1675 | if (rc) | |
8e09f215 | 1676 | goto out_err1; |
40545573 | 1677 | |
a521b048 | 1678 | /* set some default values */ |
7c8faa86 | 1679 | device->default_expires = DASD_EXPIRES; |
1f1ee9ad | 1680 | device->default_retries = DASD_RETRIES; |
a521b048 SH |
1681 | device->path_thrhld = DASD_ECKD_PATH_THRHLD; |
1682 | device->path_interval = DASD_ECKD_PATH_INTERVAL; | |
1f1ee9ad | 1683 | |
7c8faa86 SH |
1684 | if (private->gneq) { |
1685 | value = 1; | |
1686 | for (i = 0; i < private->gneq->timeout.value; i++) | |
1687 | value = 10 * value; | |
1688 | value = value * private->gneq->timeout.number; | |
1689 | /* do not accept useless values */ | |
1690 | if (value != 0 && value <= DASD_EXPIRES_MAX) | |
1691 | device->default_expires = value; | |
1692 | } | |
1693 | ||
2dedf0d9 SH |
1694 | dasd_eckd_get_uid(device, &temp_uid); |
1695 | if (temp_uid.type == UA_BASE_DEVICE) { | |
8e09f215 SW |
1696 | block = dasd_alloc_block(); |
1697 | if (IS_ERR(block)) { | |
b8ed5dd5 SH |
1698 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", |
1699 | "could not allocate dasd " | |
1700 | "block structure"); | |
8e09f215 SW |
1701 | rc = PTR_ERR(block); |
1702 | goto out_err1; | |
1703 | } | |
1704 | device->block = block; | |
1705 | block->base = device; | |
1706 | } | |
1707 | ||
f9f8d02f SH |
1708 | /* register lcu with alias handling, enable PAV */ |
1709 | rc = dasd_alias_make_device_known_to_lcu(device); | |
1710 | if (rc) | |
8e09f215 | 1711 | goto out_err2; |
f9f8d02f | 1712 | |
12d7b107 | 1713 | dasd_eckd_validate_server(device, 0); |
f4ac1d02 SW |
1714 | |
1715 | /* device may report different configuration data after LCU setup */ | |
1716 | rc = dasd_eckd_read_conf(device); | |
1717 | if (rc) | |
1718 | goto out_err3; | |
8e09f215 SW |
1719 | |
1720 | /* Read Feature Codes */ | |
68d1e5f0 | 1721 | dasd_eckd_read_features(device); |
40545573 | 1722 | |
1da177e4 | 1723 | /* Read Device Characteristics */ |
68b781fe SH |
1724 | rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, |
1725 | &private->rdc_data, 64); | |
8e09f215 | 1726 | if (rc) { |
b8ed5dd5 SH |
1727 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, |
1728 | "Read device characteristic failed, rc=%d", rc); | |
8e09f215 SW |
1729 | goto out_err3; |
1730 | } | |
34cd551a SH |
1731 | |
1732 | if ((device->features & DASD_FEATURE_USERAW) && | |
1733 | !(private->rdc_data.facilities.RT_in_LR)) { | |
1734 | dev_err(&device->cdev->dev, "The storage server does not " | |
1735 | "support raw-track access\n"); | |
1736 | rc = -EINVAL; | |
1737 | goto out_err3; | |
1738 | } | |
1739 | ||
817f2c84 | 1740 | /* find the valid cylinder size */ |
b44b0ab3 SW |
1741 | if (private->rdc_data.no_cyl == LV_COMPAT_CYL && |
1742 | private->rdc_data.long_no_cyl) | |
1743 | private->real_cyl = private->rdc_data.long_no_cyl; | |
1744 | else | |
1745 | private->real_cyl = private->rdc_data.no_cyl; | |
1746 | ||
ef19298b SW |
1747 | private->fcx_max_data = get_fcx_max_data(device); |
1748 | ||
33b62a30 SW |
1749 | readonly = dasd_device_is_ro(device); |
1750 | if (readonly) | |
1751 | set_bit(DASD_FLAG_DEVICE_RO, &device->flags); | |
1752 | ||
fc19f381 | 1753 | dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " |
33b62a30 | 1754 | "with %d cylinders, %d heads, %d sectors%s\n", |
fc19f381 SH |
1755 | private->rdc_data.dev_type, |
1756 | private->rdc_data.dev_model, | |
1757 | private->rdc_data.cu_type, | |
1758 | private->rdc_data.cu_model.model, | |
92636b15 | 1759 | private->real_cyl, |
fc19f381 | 1760 | private->rdc_data.trk_per_cyl, |
33b62a30 SW |
1761 | private->rdc_data.sec_per_trk, |
1762 | readonly ? ", read-only device" : ""); | |
8e09f215 SW |
1763 | return 0; |
1764 | ||
1765 | out_err3: | |
1766 | dasd_alias_disconnect_device_from_lcu(device); | |
1767 | out_err2: | |
1768 | dasd_free_block(device->block); | |
1769 | device->block = NULL; | |
1770 | out_err1: | |
4abb08c2 | 1771 | kfree(private->conf_data); |
8e09f215 SW |
1772 | kfree(device->private); |
1773 | device->private = NULL; | |
3d052595 | 1774 | return rc; |
1da177e4 LT |
1775 | } |
1776 | ||
8e09f215 SW |
1777 | static void dasd_eckd_uncheck_device(struct dasd_device *device) |
1778 | { | |
543691a4 | 1779 | struct dasd_eckd_private *private = device->private; |
b179b037 | 1780 | int i; |
4abb08c2 | 1781 | |
8e09f215 | 1782 | dasd_alias_disconnect_device_from_lcu(device); |
4abb08c2 SW |
1783 | private->ned = NULL; |
1784 | private->sneq = NULL; | |
1785 | private->vdsneq = NULL; | |
1786 | private->gneq = NULL; | |
1787 | private->conf_len = 0; | |
b179b037 | 1788 | for (i = 0; i < 8; i++) { |
c9346151 SH |
1789 | kfree(device->path[i].conf_data); |
1790 | if ((__u8 *)device->path[i].conf_data == | |
b179b037 SH |
1791 | private->conf_data) { |
1792 | private->conf_data = NULL; | |
1793 | private->conf_len = 0; | |
1794 | } | |
c9346151 | 1795 | device->path[i].conf_data = NULL; |
a521b048 SH |
1796 | device->path[i].cssid = 0; |
1797 | device->path[i].ssid = 0; | |
1798 | device->path[i].chpid = 0; | |
b179b037 | 1799 | } |
4abb08c2 SW |
1800 | kfree(private->conf_data); |
1801 | private->conf_data = NULL; | |
8e09f215 SW |
1802 | } |
1803 | ||
1da177e4 LT |
1804 | static struct dasd_ccw_req * |
1805 | dasd_eckd_analysis_ccw(struct dasd_device *device) | |
1806 | { | |
543691a4 | 1807 | struct dasd_eckd_private *private = device->private; |
1da177e4 LT |
1808 | struct eckd_count *count_data; |
1809 | struct LO_eckd_data *LO_data; | |
1810 | struct dasd_ccw_req *cqr; | |
1811 | struct ccw1 *ccw; | |
1812 | int cplength, datasize; | |
1813 | int i; | |
1814 | ||
1da177e4 LT |
1815 | cplength = 8; |
1816 | datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); | |
68b781fe | 1817 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); |
1da177e4 LT |
1818 | if (IS_ERR(cqr)) |
1819 | return cqr; | |
1820 | ccw = cqr->cpaddr; | |
1821 | /* Define extent for the first 3 tracks. */ | |
1822 | define_extent(ccw++, cqr->data, 0, 2, | |
45f186be | 1823 | DASD_ECKD_CCW_READ_COUNT, device, 0); |
8e09f215 | 1824 | LO_data = cqr->data + sizeof(struct DE_eckd_data); |
1da177e4 LT |
1825 | /* Locate record for the first 4 records on track 0. */ |
1826 | ccw[-1].flags |= CCW_FLAG_CC; | |
1827 | locate_record(ccw++, LO_data++, 0, 0, 4, | |
1828 | DASD_ECKD_CCW_READ_COUNT, device, 0); | |
1829 | ||
1830 | count_data = private->count_area; | |
1831 | for (i = 0; i < 4; i++) { | |
1832 | ccw[-1].flags |= CCW_FLAG_CC; | |
1833 | ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; | |
1834 | ccw->flags = 0; | |
1835 | ccw->count = 8; | |
1836 | ccw->cda = (__u32)(addr_t) count_data; | |
1837 | ccw++; | |
1838 | count_data++; | |
1839 | } | |
1840 | ||
1841 | /* Locate record for the first record on track 2. */ | |
1842 | ccw[-1].flags |= CCW_FLAG_CC; | |
1843 | locate_record(ccw++, LO_data++, 2, 0, 1, | |
1844 | DASD_ECKD_CCW_READ_COUNT, device, 0); | |
1845 | /* Read count ccw. */ | |
1846 | ccw[-1].flags |= CCW_FLAG_CC; | |
1847 | ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; | |
1848 | ccw->flags = 0; | |
1849 | ccw->count = 8; | |
1850 | ccw->cda = (__u32)(addr_t) count_data; | |
1851 | ||
8e09f215 SW |
1852 | cqr->block = NULL; |
1853 | cqr->startdev = device; | |
1854 | cqr->memdev = device; | |
eb6e199b | 1855 | cqr->retries = 255; |
1aae0560 | 1856 | cqr->buildclk = get_tod_clock(); |
1da177e4 LT |
1857 | cqr->status = DASD_CQR_FILLED; |
1858 | return cqr; | |
1859 | } | |
1860 | ||
eb6e199b SW |
1861 | /* differentiate between 'no record found' and any other error */ |
1862 | static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) | |
1863 | { | |
1864 | char *sense; | |
1865 | if (init_cqr->status == DASD_CQR_DONE) | |
1866 | return INIT_CQR_OK; | |
1867 | else if (init_cqr->status == DASD_CQR_NEED_ERP || | |
1868 | init_cqr->status == DASD_CQR_FAILED) { | |
1869 | sense = dasd_get_sense(&init_cqr->irb); | |
1870 | if (sense && (sense[1] & SNS1_NO_REC_FOUND)) | |
1871 | return INIT_CQR_UNFORMATTED; | |
1872 | else | |
1873 | return INIT_CQR_ERROR; | |
1874 | } else | |
1875 | return INIT_CQR_ERROR; | |
1876 | } | |
1877 | ||
1da177e4 LT |
1878 | /* |
1879 | * This is the callback function for the init_analysis cqr. It saves | |
1880 | * the status of the initial analysis ccw before it frees it and kicks | |
1881 | * the device to continue the startup sequence. This will call | |
1882 | * dasd_eckd_do_analysis again (if the devices has not been marked | |
1883 | * for deletion in the meantime). | |
1884 | */ | |
eb6e199b SW |
1885 | static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, |
1886 | void *data) | |
1da177e4 | 1887 | { |
543691a4 SO |
1888 | struct dasd_device *device = init_cqr->startdev; |
1889 | struct dasd_eckd_private *private = device->private; | |
1da177e4 | 1890 | |
eb6e199b | 1891 | private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); |
1da177e4 LT |
1892 | dasd_sfree_request(init_cqr, device); |
1893 | dasd_kick_device(device); | |
1894 | } | |
1895 | ||
eb6e199b | 1896 | static int dasd_eckd_start_analysis(struct dasd_block *block) |
1da177e4 | 1897 | { |
1da177e4 LT |
1898 | struct dasd_ccw_req *init_cqr; |
1899 | ||
8e09f215 | 1900 | init_cqr = dasd_eckd_analysis_ccw(block->base); |
1da177e4 LT |
1901 | if (IS_ERR(init_cqr)) |
1902 | return PTR_ERR(init_cqr); | |
1903 | init_cqr->callback = dasd_eckd_analysis_callback; | |
1904 | init_cqr->callback_data = NULL; | |
1905 | init_cqr->expires = 5*HZ; | |
eb6e199b SW |
1906 | /* first try without ERP, so we can later handle unformatted |
1907 | * devices as special case | |
1908 | */ | |
1909 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); | |
1910 | init_cqr->retries = 0; | |
1da177e4 LT |
1911 | dasd_add_request_head(init_cqr); |
1912 | return -EAGAIN; | |
1913 | } | |
1914 | ||
eb6e199b | 1915 | static int dasd_eckd_end_analysis(struct dasd_block *block) |
1da177e4 | 1916 | { |
543691a4 SO |
1917 | struct dasd_device *device = block->base; |
1918 | struct dasd_eckd_private *private = device->private; | |
1da177e4 LT |
1919 | struct eckd_count *count_area; |
1920 | unsigned int sb, blk_per_trk; | |
1921 | int status, i; | |
eb6e199b | 1922 | struct dasd_ccw_req *init_cqr; |
1da177e4 | 1923 | |
1da177e4 LT |
1924 | status = private->init_cqr_status; |
1925 | private->init_cqr_status = -1; | |
eb6e199b SW |
1926 | if (status == INIT_CQR_ERROR) { |
1927 | /* try again, this time with full ERP */ | |
1928 | init_cqr = dasd_eckd_analysis_ccw(device); | |
1929 | dasd_sleep_on(init_cqr); | |
1930 | status = dasd_eckd_analysis_evaluation(init_cqr); | |
1931 | dasd_sfree_request(init_cqr, device); | |
1932 | } | |
1933 | ||
e4dbb0f2 SH |
1934 | if (device->features & DASD_FEATURE_USERAW) { |
1935 | block->bp_block = DASD_RAW_BLOCKSIZE; | |
1936 | blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; | |
1937 | block->s2b_shift = 3; | |
1938 | goto raw; | |
1939 | } | |
1940 | ||
eb6e199b SW |
1941 | if (status == INIT_CQR_UNFORMATTED) { |
1942 | dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); | |
1da177e4 | 1943 | return -EMEDIUMTYPE; |
eb6e199b SW |
1944 | } else if (status == INIT_CQR_ERROR) { |
1945 | dev_err(&device->cdev->dev, | |
1946 | "Detecting the DASD disk layout failed because " | |
1947 | "of an I/O error\n"); | |
1948 | return -EIO; | |
1da177e4 LT |
1949 | } |
1950 | ||
1951 | private->uses_cdl = 1; | |
1da177e4 LT |
1952 | /* Check Track 0 for Compatible Disk Layout */ |
1953 | count_area = NULL; | |
1954 | for (i = 0; i < 3; i++) { | |
1955 | if (private->count_area[i].kl != 4 || | |
3bc9fef9 SH |
1956 | private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 || |
1957 | private->count_area[i].cyl != 0 || | |
1958 | private->count_area[i].head != count_area_head[i] || | |
1959 | private->count_area[i].record != count_area_rec[i]) { | |
1da177e4 LT |
1960 | private->uses_cdl = 0; |
1961 | break; | |
1962 | } | |
1963 | } | |
1964 | if (i == 3) | |
1965 | count_area = &private->count_area[4]; | |
1966 | ||
1967 | if (private->uses_cdl == 0) { | |
1968 | for (i = 0; i < 5; i++) { | |
1969 | if ((private->count_area[i].kl != 0) || | |
1970 | (private->count_area[i].dl != | |
3bc9fef9 SH |
1971 | private->count_area[0].dl) || |
1972 | private->count_area[i].cyl != 0 || | |
1973 | private->count_area[i].head != count_area_head[i] || | |
1974 | private->count_area[i].record != count_area_rec[i]) | |
1da177e4 LT |
1975 | break; |
1976 | } | |
1977 | if (i == 5) | |
1978 | count_area = &private->count_area[0]; | |
1979 | } else { | |
1980 | if (private->count_area[3].record == 1) | |
fc19f381 SH |
1981 | dev_warn(&device->cdev->dev, |
1982 | "Track 0 has no records following the VTOC\n"); | |
1da177e4 | 1983 | } |
e4dbb0f2 | 1984 | |
1da177e4 LT |
1985 | if (count_area != NULL && count_area->kl == 0) { |
1986 | /* we found notthing violating our disk layout */ | |
1987 | if (dasd_check_blocksize(count_area->dl) == 0) | |
8e09f215 | 1988 | block->bp_block = count_area->dl; |
1da177e4 | 1989 | } |
8e09f215 | 1990 | if (block->bp_block == 0) { |
fc19f381 SH |
1991 | dev_warn(&device->cdev->dev, |
1992 | "The disk layout of the DASD is not supported\n"); | |
1da177e4 LT |
1993 | return -EMEDIUMTYPE; |
1994 | } | |
8e09f215 SW |
1995 | block->s2b_shift = 0; /* bits to shift 512 to get a block */ |
1996 | for (sb = 512; sb < block->bp_block; sb = sb << 1) | |
1997 | block->s2b_shift++; | |
1da177e4 | 1998 | |
8e09f215 | 1999 | blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); |
e4dbb0f2 SH |
2000 | |
2001 | raw: | |
b44b0ab3 | 2002 | block->blocks = (private->real_cyl * |
1da177e4 LT |
2003 | private->rdc_data.trk_per_cyl * |
2004 | blk_per_trk); | |
2005 | ||
fc19f381 SH |
2006 | dev_info(&device->cdev->dev, |
2007 | "DASD with %d KB/block, %d KB total size, %d KB/track, " | |
2008 | "%s\n", (block->bp_block >> 10), | |
2009 | ((private->real_cyl * | |
2010 | private->rdc_data.trk_per_cyl * | |
2011 | blk_per_trk * (block->bp_block >> 9)) >> 1), | |
2012 | ((blk_per_trk * block->bp_block) >> 10), | |
2013 | private->uses_cdl ? | |
2014 | "compatible disk layout" : "linux disk layout"); | |
1da177e4 LT |
2015 | |
2016 | return 0; | |
2017 | } | |
2018 | ||
8e09f215 | 2019 | static int dasd_eckd_do_analysis(struct dasd_block *block) |
1da177e4 | 2020 | { |
543691a4 | 2021 | struct dasd_eckd_private *private = block->base->private; |
1da177e4 | 2022 | |
1da177e4 | 2023 | if (private->init_cqr_status < 0) |
8e09f215 | 2024 | return dasd_eckd_start_analysis(block); |
1da177e4 | 2025 | else |
8e09f215 | 2026 | return dasd_eckd_end_analysis(block); |
1da177e4 LT |
2027 | } |
2028 | ||
d42e1712 | 2029 | static int dasd_eckd_basic_to_ready(struct dasd_device *device) |
8e09f215 SW |
2030 | { |
2031 | return dasd_alias_add_device(device); | |
2032 | }; | |
2033 | ||
2034 | static int dasd_eckd_online_to_ready(struct dasd_device *device) | |
2035 | { | |
501183f2 | 2036 | cancel_work_sync(&device->reload_device); |
25e2cf1c | 2037 | cancel_work_sync(&device->kick_validate); |
d42e1712 SH |
2038 | return 0; |
2039 | }; | |
2040 | ||
daa991bf | 2041 | static int dasd_eckd_basic_to_known(struct dasd_device *device) |
d42e1712 | 2042 | { |
8e09f215 SW |
2043 | return dasd_alias_remove_device(device); |
2044 | }; | |
2045 | ||
1da177e4 | 2046 | static int |
8e09f215 | 2047 | dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) |
1da177e4 | 2048 | { |
543691a4 | 2049 | struct dasd_eckd_private *private = block->base->private; |
1da177e4 | 2050 | |
8e09f215 | 2051 | if (dasd_check_blocksize(block->bp_block) == 0) { |
1da177e4 | 2052 | geo->sectors = recs_per_track(&private->rdc_data, |
8e09f215 | 2053 | 0, block->bp_block); |
1da177e4 LT |
2054 | } |
2055 | geo->cylinders = private->rdc_data.no_cyl; | |
2056 | geo->heads = private->rdc_data.trk_per_cyl; | |
2057 | return 0; | |
2058 | } | |
2059 | ||
8fd57520 JH |
2060 | /* |
2061 | * Build the TCW request for the format check | |
2062 | */ | |
2063 | static struct dasd_ccw_req * | |
2064 | dasd_eckd_build_check_tcw(struct dasd_device *base, struct format_data_t *fdata, | |
2065 | int enable_pav, struct eckd_count *fmt_buffer, | |
2066 | int rpt) | |
2067 | { | |
2068 | struct dasd_eckd_private *start_priv; | |
2069 | struct dasd_device *startdev = NULL; | |
2070 | struct tidaw *last_tidaw = NULL; | |
2071 | struct dasd_ccw_req *cqr; | |
2072 | struct itcw *itcw; | |
2073 | int itcw_size; | |
2074 | int count; | |
2075 | int rc; | |
2076 | int i; | |
2077 | ||
2078 | if (enable_pav) | |
2079 | startdev = dasd_alias_get_start_dev(base); | |
2080 | ||
2081 | if (!startdev) | |
2082 | startdev = base; | |
2083 | ||
2084 | start_priv = startdev->private; | |
2085 | ||
2086 | count = rpt * (fdata->stop_unit - fdata->start_unit + 1); | |
2087 | ||
2088 | /* | |
2089 | * we're adding 'count' amount of tidaw to the itcw. | |
2090 | * calculate the corresponding itcw_size | |
2091 | */ | |
2092 | itcw_size = itcw_calc_size(0, count, 0); | |
2093 | ||
2094 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); | |
2095 | if (IS_ERR(cqr)) | |
2096 | return cqr; | |
2097 | ||
2098 | start_priv->count++; | |
2099 | ||
2100 | itcw = itcw_init(cqr->data, itcw_size, ITCW_OP_READ, 0, count, 0); | |
2101 | if (IS_ERR(itcw)) { | |
2102 | rc = -EINVAL; | |
2103 | goto out_err; | |
2104 | } | |
2105 | ||
2106 | cqr->cpaddr = itcw_get_tcw(itcw); | |
2107 | rc = prepare_itcw(itcw, fdata->start_unit, fdata->stop_unit, | |
2108 | DASD_ECKD_CCW_READ_COUNT_MT, base, startdev, 0, count, | |
2109 | sizeof(struct eckd_count), | |
2110 | count * sizeof(struct eckd_count), 0, rpt); | |
2111 | if (rc) | |
2112 | goto out_err; | |
2113 | ||
2114 | for (i = 0; i < count; i++) { | |
2115 | last_tidaw = itcw_add_tidaw(itcw, 0, fmt_buffer++, | |
2116 | sizeof(struct eckd_count)); | |
2117 | if (IS_ERR(last_tidaw)) { | |
2118 | rc = -EINVAL; | |
2119 | goto out_err; | |
2120 | } | |
2121 | } | |
2122 | ||
2123 | last_tidaw->flags |= TIDAW_FLAGS_LAST; | |
2124 | itcw_finalize(itcw); | |
2125 | ||
2126 | cqr->cpmode = 1; | |
2127 | cqr->startdev = startdev; | |
2128 | cqr->memdev = startdev; | |
2129 | cqr->basedev = base; | |
2130 | cqr->retries = startdev->default_retries; | |
2131 | cqr->expires = startdev->default_expires * HZ; | |
2132 | cqr->buildclk = get_tod_clock(); | |
2133 | cqr->status = DASD_CQR_FILLED; | |
2134 | /* Set flags to suppress output for expected errors */ | |
2135 | set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); | |
2136 | set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); | |
2137 | ||
2138 | return cqr; | |
2139 | ||
2140 | out_err: | |
2141 | dasd_sfree_request(cqr, startdev); | |
2142 | ||
2143 | return ERR_PTR(rc); | |
2144 | } | |
2145 | ||
2146 | /* | |
2147 | * Build the CCW request for the format check | |
2148 | */ | |
2149 | static struct dasd_ccw_req * | |
2150 | dasd_eckd_build_check(struct dasd_device *base, struct format_data_t *fdata, | |
2151 | int enable_pav, struct eckd_count *fmt_buffer, int rpt) | |
2152 | { | |
2153 | struct dasd_eckd_private *start_priv; | |
2154 | struct dasd_eckd_private *base_priv; | |
2155 | struct dasd_device *startdev = NULL; | |
2156 | struct dasd_ccw_req *cqr; | |
2157 | struct ccw1 *ccw; | |
2158 | void *data; | |
2159 | int cplength, datasize; | |
2160 | int use_prefix; | |
2161 | int count; | |
2162 | int i; | |
2163 | ||
2164 | if (enable_pav) | |
2165 | startdev = dasd_alias_get_start_dev(base); | |
2166 | ||
2167 | if (!startdev) | |
2168 | startdev = base; | |
2169 | ||
2170 | start_priv = startdev->private; | |
2171 | base_priv = base->private; | |
2172 | ||
2173 | count = rpt * (fdata->stop_unit - fdata->start_unit + 1); | |
2174 | ||
2175 | use_prefix = base_priv->features.feature[8] & 0x01; | |
2176 | ||
2177 | if (use_prefix) { | |
2178 | cplength = 1; | |
2179 | datasize = sizeof(struct PFX_eckd_data); | |
2180 | } else { | |
2181 | cplength = 2; | |
2182 | datasize = sizeof(struct DE_eckd_data) + | |
2183 | sizeof(struct LO_eckd_data); | |
2184 | } | |
2185 | cplength += count; | |
2186 | ||
2187 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, | |
2188 | startdev); | |
2189 | if (IS_ERR(cqr)) | |
2190 | return cqr; | |
2191 | ||
2192 | start_priv->count++; | |
2193 | data = cqr->data; | |
2194 | ccw = cqr->cpaddr; | |
2195 | ||
2196 | if (use_prefix) { | |
2197 | prefix_LRE(ccw++, data, fdata->start_unit, fdata->stop_unit, | |
2198 | DASD_ECKD_CCW_READ_COUNT, base, startdev, 1, 0, | |
2199 | count, 0, 0); | |
2200 | } else { | |
2201 | define_extent(ccw++, data, fdata->start_unit, fdata->stop_unit, | |
45f186be | 2202 | DASD_ECKD_CCW_READ_COUNT, startdev, 0); |
8fd57520 JH |
2203 | |
2204 | data += sizeof(struct DE_eckd_data); | |
2205 | ccw[-1].flags |= CCW_FLAG_CC; | |
2206 | ||
2207 | locate_record(ccw++, data, fdata->start_unit, 0, count, | |
2208 | DASD_ECKD_CCW_READ_COUNT, base, 0); | |
2209 | } | |
2210 | ||
2211 | for (i = 0; i < count; i++) { | |
2212 | ccw[-1].flags |= CCW_FLAG_CC; | |
2213 | ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; | |
2214 | ccw->flags = CCW_FLAG_SLI; | |
2215 | ccw->count = 8; | |
2216 | ccw->cda = (__u32)(addr_t) fmt_buffer; | |
2217 | ccw++; | |
2218 | fmt_buffer++; | |
2219 | } | |
2220 | ||
2221 | cqr->startdev = startdev; | |
2222 | cqr->memdev = startdev; | |
2223 | cqr->basedev = base; | |
2224 | cqr->retries = DASD_RETRIES; | |
2225 | cqr->expires = startdev->default_expires * HZ; | |
2226 | cqr->buildclk = get_tod_clock(); | |
2227 | cqr->status = DASD_CQR_FILLED; | |
2228 | /* Set flags to suppress output for expected errors */ | |
2229 | set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); | |
2230 | ||
2231 | return cqr; | |
2232 | } | |
2233 | ||
1da177e4 | 2234 | static struct dasd_ccw_req * |
d42e1712 | 2235 | dasd_eckd_build_format(struct dasd_device *base, |
29b8dd9d | 2236 | struct format_data_t *fdata, |
a94fa154 | 2237 | int enable_pav) |
1da177e4 | 2238 | { |
d42e1712 SH |
2239 | struct dasd_eckd_private *base_priv; |
2240 | struct dasd_eckd_private *start_priv; | |
29b8dd9d | 2241 | struct dasd_device *startdev = NULL; |
1da177e4 LT |
2242 | struct dasd_ccw_req *fcp; |
2243 | struct eckd_count *ect; | |
d42e1712 | 2244 | struct ch_t address; |
1da177e4 LT |
2245 | struct ccw1 *ccw; |
2246 | void *data; | |
b44b0ab3 | 2247 | int rpt; |
1da177e4 | 2248 | int cplength, datasize; |
d42e1712 | 2249 | int i, j; |
f9a28f7b JBJ |
2250 | int intensity = 0; |
2251 | int r0_perm; | |
d42e1712 | 2252 | int nr_tracks; |
18d6624e | 2253 | int use_prefix; |
1da177e4 | 2254 | |
a94fa154 | 2255 | if (enable_pav) |
29b8dd9d SH |
2256 | startdev = dasd_alias_get_start_dev(base); |
2257 | ||
d42e1712 SH |
2258 | if (!startdev) |
2259 | startdev = base; | |
1da177e4 | 2260 | |
543691a4 SO |
2261 | start_priv = startdev->private; |
2262 | base_priv = base->private; | |
d42e1712 SH |
2263 | |
2264 | rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize); | |
2265 | ||
2266 | nr_tracks = fdata->stop_unit - fdata->start_unit + 1; | |
1da177e4 LT |
2267 | |
2268 | /* | |
2269 | * fdata->intensity is a bit string that tells us what to do: | |
2270 | * Bit 0: write record zero | |
2271 | * Bit 1: write home address, currently not supported | |
2272 | * Bit 2: invalidate tracks | |
2273 | * Bit 3: use OS/390 compatible disk layout (cdl) | |
f9a28f7b | 2274 | * Bit 4: do not allow storage subsystem to modify record zero |
1da177e4 LT |
2275 | * Only some bit combinations do make sense. |
2276 | */ | |
f9a28f7b JBJ |
2277 | if (fdata->intensity & 0x10) { |
2278 | r0_perm = 0; | |
2279 | intensity = fdata->intensity & ~0x10; | |
2280 | } else { | |
2281 | r0_perm = 1; | |
2282 | intensity = fdata->intensity; | |
2283 | } | |
d42e1712 | 2284 | |
18d6624e SH |
2285 | use_prefix = base_priv->features.feature[8] & 0x01; |
2286 | ||
f9a28f7b | 2287 | switch (intensity) { |
1da177e4 LT |
2288 | case 0x00: /* Normal format */ |
2289 | case 0x08: /* Normal format, use cdl. */ | |
d42e1712 | 2290 | cplength = 2 + (rpt*nr_tracks); |
18d6624e SH |
2291 | if (use_prefix) |
2292 | datasize = sizeof(struct PFX_eckd_data) + | |
2293 | sizeof(struct LO_eckd_data) + | |
2294 | rpt * nr_tracks * sizeof(struct eckd_count); | |
2295 | else | |
2296 | datasize = sizeof(struct DE_eckd_data) + | |
2297 | sizeof(struct LO_eckd_data) + | |
2298 | rpt * nr_tracks * sizeof(struct eckd_count); | |
1da177e4 LT |
2299 | break; |
2300 | case 0x01: /* Write record zero and format track. */ | |
2301 | case 0x09: /* Write record zero and format track, use cdl. */ | |
d42e1712 | 2302 | cplength = 2 + rpt * nr_tracks; |
18d6624e SH |
2303 | if (use_prefix) |
2304 | datasize = sizeof(struct PFX_eckd_data) + | |
2305 | sizeof(struct LO_eckd_data) + | |
2306 | sizeof(struct eckd_count) + | |
2307 | rpt * nr_tracks * sizeof(struct eckd_count); | |
2308 | else | |
2309 | datasize = sizeof(struct DE_eckd_data) + | |
2310 | sizeof(struct LO_eckd_data) + | |
2311 | sizeof(struct eckd_count) + | |
2312 | rpt * nr_tracks * sizeof(struct eckd_count); | |
1da177e4 LT |
2313 | break; |
2314 | case 0x04: /* Invalidate track. */ | |
2315 | case 0x0c: /* Invalidate track, use cdl. */ | |
2316 | cplength = 3; | |
18d6624e SH |
2317 | if (use_prefix) |
2318 | datasize = sizeof(struct PFX_eckd_data) + | |
2319 | sizeof(struct LO_eckd_data) + | |
2320 | sizeof(struct eckd_count); | |
2321 | else | |
2322 | datasize = sizeof(struct DE_eckd_data) + | |
2323 | sizeof(struct LO_eckd_data) + | |
2324 | sizeof(struct eckd_count); | |
1da177e4 LT |
2325 | break; |
2326 | default: | |
d42e1712 SH |
2327 | dev_warn(&startdev->cdev->dev, |
2328 | "An I/O control call used incorrect flags 0x%x\n", | |
2329 | fdata->intensity); | |
1da177e4 LT |
2330 | return ERR_PTR(-EINVAL); |
2331 | } | |
2332 | /* Allocate the format ccw request. */ | |
d42e1712 SH |
2333 | fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, |
2334 | datasize, startdev); | |
1da177e4 LT |
2335 | if (IS_ERR(fcp)) |
2336 | return fcp; | |
2337 | ||
d42e1712 | 2338 | start_priv->count++; |
1da177e4 LT |
2339 | data = fcp->data; |
2340 | ccw = fcp->cpaddr; | |
2341 | ||
f9a28f7b | 2342 | switch (intensity & ~0x08) { |
1da177e4 | 2343 | case 0x00: /* Normal format. */ |
18d6624e SH |
2344 | if (use_prefix) { |
2345 | prefix(ccw++, (struct PFX_eckd_data *) data, | |
2346 | fdata->start_unit, fdata->stop_unit, | |
2347 | DASD_ECKD_CCW_WRITE_CKD, base, startdev); | |
2348 | /* grant subsystem permission to format R0 */ | |
2349 | if (r0_perm) | |
2350 | ((struct PFX_eckd_data *)data) | |
2351 | ->define_extent.ga_extended |= 0x04; | |
2352 | data += sizeof(struct PFX_eckd_data); | |
2353 | } else { | |
2354 | define_extent(ccw++, (struct DE_eckd_data *) data, | |
2355 | fdata->start_unit, fdata->stop_unit, | |
45f186be | 2356 | DASD_ECKD_CCW_WRITE_CKD, startdev, 0); |
18d6624e SH |
2357 | /* grant subsystem permission to format R0 */ |
2358 | if (r0_perm) | |
2359 | ((struct DE_eckd_data *) data) | |
2360 | ->ga_extended |= 0x04; | |
2361 | data += sizeof(struct DE_eckd_data); | |
2362 | } | |
1da177e4 LT |
2363 | ccw[-1].flags |= CCW_FLAG_CC; |
2364 | locate_record(ccw++, (struct LO_eckd_data *) data, | |
d42e1712 SH |
2365 | fdata->start_unit, 0, rpt*nr_tracks, |
2366 | DASD_ECKD_CCW_WRITE_CKD, base, | |
1da177e4 LT |
2367 | fdata->blksize); |
2368 | data += sizeof(struct LO_eckd_data); | |
2369 | break; | |
2370 | case 0x01: /* Write record zero + format track. */ | |
18d6624e SH |
2371 | if (use_prefix) { |
2372 | prefix(ccw++, (struct PFX_eckd_data *) data, | |
2373 | fdata->start_unit, fdata->stop_unit, | |
2374 | DASD_ECKD_CCW_WRITE_RECORD_ZERO, | |
2375 | base, startdev); | |
2376 | data += sizeof(struct PFX_eckd_data); | |
2377 | } else { | |
2378 | define_extent(ccw++, (struct DE_eckd_data *) data, | |
2379 | fdata->start_unit, fdata->stop_unit, | |
45f186be | 2380 | DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev, 0); |
18d6624e SH |
2381 | data += sizeof(struct DE_eckd_data); |
2382 | } | |
1da177e4 LT |
2383 | ccw[-1].flags |= CCW_FLAG_CC; |
2384 | locate_record(ccw++, (struct LO_eckd_data *) data, | |
d42e1712 SH |
2385 | fdata->start_unit, 0, rpt * nr_tracks + 1, |
2386 | DASD_ECKD_CCW_WRITE_RECORD_ZERO, base, | |
2387 | base->block->bp_block); | |
1da177e4 LT |
2388 | data += sizeof(struct LO_eckd_data); |
2389 | break; | |
2390 | case 0x04: /* Invalidate track. */ | |
18d6624e SH |
2391 | if (use_prefix) { |
2392 | prefix(ccw++, (struct PFX_eckd_data *) data, | |
2393 | fdata->start_unit, fdata->stop_unit, | |
2394 | DASD_ECKD_CCW_WRITE_CKD, base, startdev); | |
2395 | data += sizeof(struct PFX_eckd_data); | |
2396 | } else { | |
2397 | define_extent(ccw++, (struct DE_eckd_data *) data, | |
2398 | fdata->start_unit, fdata->stop_unit, | |
45f186be | 2399 | DASD_ECKD_CCW_WRITE_CKD, startdev, 0); |
18d6624e SH |
2400 | data += sizeof(struct DE_eckd_data); |
2401 | } | |
1da177e4 LT |
2402 | ccw[-1].flags |= CCW_FLAG_CC; |
2403 | locate_record(ccw++, (struct LO_eckd_data *) data, | |
2404 | fdata->start_unit, 0, 1, | |
d42e1712 | 2405 | DASD_ECKD_CCW_WRITE_CKD, base, 8); |
1da177e4 LT |
2406 | data += sizeof(struct LO_eckd_data); |
2407 | break; | |
2408 | } | |
d42e1712 SH |
2409 | |
2410 | for (j = 0; j < nr_tracks; j++) { | |
2411 | /* calculate cylinder and head for the current track */ | |
2412 | set_ch_t(&address, | |
2413 | (fdata->start_unit + j) / | |
2414 | base_priv->rdc_data.trk_per_cyl, | |
2415 | (fdata->start_unit + j) % | |
2416 | base_priv->rdc_data.trk_per_cyl); | |
2417 | if (intensity & 0x01) { /* write record zero */ | |
1da177e4 LT |
2418 | ect = (struct eckd_count *) data; |
2419 | data += sizeof(struct eckd_count); | |
b44b0ab3 SW |
2420 | ect->cyl = address.cyl; |
2421 | ect->head = address.head; | |
d42e1712 | 2422 | ect->record = 0; |
1da177e4 | 2423 | ect->kl = 0; |
d42e1712 | 2424 | ect->dl = 8; |
1da177e4 | 2425 | ccw[-1].flags |= CCW_FLAG_CC; |
d42e1712 | 2426 | ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; |
1da177e4 LT |
2427 | ccw->flags = CCW_FLAG_SLI; |
2428 | ccw->count = 8; | |
2429 | ccw->cda = (__u32)(addr_t) ect; | |
2430 | ccw++; | |
2431 | } | |
d42e1712 SH |
2432 | if ((intensity & ~0x08) & 0x04) { /* erase track */ |
2433 | ect = (struct eckd_count *) data; | |
2434 | data += sizeof(struct eckd_count); | |
2435 | ect->cyl = address.cyl; | |
2436 | ect->head = address.head; | |
2437 | ect->record = 1; | |
2438 | ect->kl = 0; | |
2439 | ect->dl = 0; | |
2440 | ccw[-1].flags |= CCW_FLAG_CC; | |
2441 | ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; | |
2442 | ccw->flags = CCW_FLAG_SLI; | |
2443 | ccw->count = 8; | |
2444 | ccw->cda = (__u32)(addr_t) ect; | |
2445 | } else { /* write remaining records */ | |
2446 | for (i = 0; i < rpt; i++) { | |
2447 | ect = (struct eckd_count *) data; | |
2448 | data += sizeof(struct eckd_count); | |
2449 | ect->cyl = address.cyl; | |
2450 | ect->head = address.head; | |
2451 | ect->record = i + 1; | |
2452 | ect->kl = 0; | |
2453 | ect->dl = fdata->blksize; | |
2454 | /* | |
2455 | * Check for special tracks 0-1 | |
2456 | * when formatting CDL | |
2457 | */ | |
2458 | if ((intensity & 0x08) && | |
46d1c03c | 2459 | address.cyl == 0 && address.head == 0) { |
d42e1712 SH |
2460 | if (i < 3) { |
2461 | ect->kl = 4; | |
2462 | ect->dl = sizes_trk0[i] - 4; | |
2463 | } | |
2464 | } | |
2465 | if ((intensity & 0x08) && | |
46d1c03c | 2466 | address.cyl == 0 && address.head == 1) { |
d42e1712 SH |
2467 | ect->kl = 44; |
2468 | ect->dl = LABEL_SIZE - 44; | |
2469 | } | |
2470 | ccw[-1].flags |= CCW_FLAG_CC; | |
2471 | if (i != 0 || j == 0) | |
2472 | ccw->cmd_code = | |
2473 | DASD_ECKD_CCW_WRITE_CKD; | |
2474 | else | |
2475 | ccw->cmd_code = | |
2476 | DASD_ECKD_CCW_WRITE_CKD_MT; | |
2477 | ccw->flags = CCW_FLAG_SLI; | |
2478 | ccw->count = 8; | |
ba21d0ea SH |
2479 | ccw->cda = (__u32)(addr_t) ect; |
2480 | ccw++; | |
d42e1712 SH |
2481 | } |
2482 | } | |
1da177e4 | 2483 | } |
d42e1712 SH |
2484 | |
2485 | fcp->startdev = startdev; | |
2486 | fcp->memdev = startdev; | |
29b8dd9d | 2487 | fcp->basedev = base; |
eb6e199b | 2488 | fcp->retries = 256; |
d42e1712 | 2489 | fcp->expires = startdev->default_expires * HZ; |
1aae0560 | 2490 | fcp->buildclk = get_tod_clock(); |
1da177e4 | 2491 | fcp->status = DASD_CQR_FILLED; |
d42e1712 | 2492 | |
1da177e4 LT |
2493 | return fcp; |
2494 | } | |
2495 | ||
570d237c JH |
2496 | /* |
2497 | * Wrapper function to build a CCW request depending on input data | |
2498 | */ | |
2499 | static struct dasd_ccw_req * | |
2500 | dasd_eckd_format_build_ccw_req(struct dasd_device *base, | |
8fd57520 JH |
2501 | struct format_data_t *fdata, int enable_pav, |
2502 | int tpm, struct eckd_count *fmt_buffer, int rpt) | |
570d237c | 2503 | { |
8fd57520 JH |
2504 | struct dasd_ccw_req *ccw_req; |
2505 | ||
2506 | if (!fmt_buffer) { | |
2507 | ccw_req = dasd_eckd_build_format(base, fdata, enable_pav); | |
2508 | } else { | |
2509 | if (tpm) | |
2510 | ccw_req = dasd_eckd_build_check_tcw(base, fdata, | |
2511 | enable_pav, | |
2512 | fmt_buffer, rpt); | |
2513 | else | |
2514 | ccw_req = dasd_eckd_build_check(base, fdata, enable_pav, | |
2515 | fmt_buffer, rpt); | |
2516 | } | |
2517 | ||
2518 | return ccw_req; | |
570d237c JH |
2519 | } |
2520 | ||
2521 | /* | |
2522 | * Sanity checks on format_data | |
2523 | */ | |
2524 | static int dasd_eckd_format_sanity_checks(struct dasd_device *base, | |
2525 | struct format_data_t *fdata) | |
d42e1712 | 2526 | { |
543691a4 | 2527 | struct dasd_eckd_private *private = base->private; |
d42e1712 | 2528 | |
d42e1712 SH |
2529 | if (fdata->start_unit >= |
2530 | (private->real_cyl * private->rdc_data.trk_per_cyl)) { | |
2531 | dev_warn(&base->cdev->dev, | |
2532 | "Start track number %u used in formatting is too big\n", | |
2533 | fdata->start_unit); | |
2534 | return -EINVAL; | |
2535 | } | |
2536 | if (fdata->stop_unit >= | |
2537 | (private->real_cyl * private->rdc_data.trk_per_cyl)) { | |
2538 | dev_warn(&base->cdev->dev, | |
2539 | "Stop track number %u used in formatting is too big\n", | |
2540 | fdata->stop_unit); | |
2541 | return -EINVAL; | |
2542 | } | |
2543 | if (fdata->start_unit > fdata->stop_unit) { | |
2544 | dev_warn(&base->cdev->dev, | |
2545 | "Start track %u used in formatting exceeds end track\n", | |
2546 | fdata->start_unit); | |
2547 | return -EINVAL; | |
2548 | } | |
2549 | if (dasd_check_blocksize(fdata->blksize) != 0) { | |
2550 | dev_warn(&base->cdev->dev, | |
2551 | "The DASD cannot be formatted with block size %u\n", | |
2552 | fdata->blksize); | |
2553 | return -EINVAL; | |
2554 | } | |
570d237c JH |
2555 | return 0; |
2556 | } | |
2557 | ||
2558 | /* | |
2559 | * This function will process format_data originally coming from an IOCTL | |
2560 | */ | |
2561 | static int dasd_eckd_format_process_data(struct dasd_device *base, | |
2562 | struct format_data_t *fdata, | |
8fd57520 JH |
2563 | int enable_pav, int tpm, |
2564 | struct eckd_count *fmt_buffer, int rpt, | |
2565 | struct irb *irb) | |
570d237c | 2566 | { |
543691a4 | 2567 | struct dasd_eckd_private *private = base->private; |
570d237c | 2568 | struct dasd_ccw_req *cqr, *n; |
570d237c JH |
2569 | struct list_head format_queue; |
2570 | struct dasd_device *device; | |
8fd57520 | 2571 | char *sense = NULL; |
570d237c JH |
2572 | int old_start, old_stop, format_step; |
2573 | int step, retry; | |
2574 | int rc; | |
2575 | ||
570d237c JH |
2576 | rc = dasd_eckd_format_sanity_checks(base, fdata); |
2577 | if (rc) | |
2578 | return rc; | |
d42e1712 SH |
2579 | |
2580 | INIT_LIST_HEAD(&format_queue); | |
d42e1712 | 2581 | |
46d1c03c | 2582 | old_start = fdata->start_unit; |
29b8dd9d | 2583 | old_stop = fdata->stop_unit; |
d42e1712 | 2584 | |
8fd57520 JH |
2585 | if (!tpm && fmt_buffer != NULL) { |
2586 | /* Command Mode / Format Check */ | |
2587 | format_step = 1; | |
2588 | } else if (tpm && fmt_buffer != NULL) { | |
2589 | /* Transport Mode / Format Check */ | |
2590 | format_step = DASD_CQR_MAX_CCW / rpt; | |
2591 | } else { | |
2592 | /* Normal Formatting */ | |
2593 | format_step = DASD_CQR_MAX_CCW / | |
2594 | recs_per_track(&private->rdc_data, 0, fdata->blksize); | |
2595 | } | |
2596 | ||
46d1c03c JH |
2597 | do { |
2598 | retry = 0; | |
2599 | while (fdata->start_unit <= old_stop) { | |
2600 | step = fdata->stop_unit - fdata->start_unit + 1; | |
2601 | if (step > format_step) { | |
2602 | fdata->stop_unit = | |
2603 | fdata->start_unit + format_step - 1; | |
2604 | } | |
d42e1712 | 2605 | |
570d237c | 2606 | cqr = dasd_eckd_format_build_ccw_req(base, fdata, |
8fd57520 JH |
2607 | enable_pav, tpm, |
2608 | fmt_buffer, rpt); | |
46d1c03c JH |
2609 | if (IS_ERR(cqr)) { |
2610 | rc = PTR_ERR(cqr); | |
2611 | if (rc == -ENOMEM) { | |
2612 | if (list_empty(&format_queue)) | |
2613 | goto out; | |
2614 | /* | |
2615 | * not enough memory available, start | |
2616 | * requests retry after first requests | |
2617 | * were finished | |
2618 | */ | |
2619 | retry = 1; | |
2620 | break; | |
2621 | } | |
2622 | goto out_err; | |
2623 | } | |
2624 | list_add_tail(&cqr->blocklist, &format_queue); | |
d42e1712 | 2625 | |
8fd57520 JH |
2626 | if (fmt_buffer) { |
2627 | step = fdata->stop_unit - fdata->start_unit + 1; | |
2628 | fmt_buffer += rpt * step; | |
2629 | } | |
46d1c03c JH |
2630 | fdata->start_unit = fdata->stop_unit + 1; |
2631 | fdata->stop_unit = old_stop; | |
d42e1712 | 2632 | } |
d42e1712 | 2633 | |
46d1c03c JH |
2634 | rc = dasd_sleep_on_queue(&format_queue); |
2635 | ||
2636 | out_err: | |
2637 | list_for_each_entry_safe(cqr, n, &format_queue, blocklist) { | |
2638 | device = cqr->startdev; | |
543691a4 | 2639 | private = device->private; |
8fd57520 JH |
2640 | |
2641 | if (cqr->status == DASD_CQR_FAILED) { | |
2642 | /* | |
2643 | * Only get sense data if called by format | |
2644 | * check | |
2645 | */ | |
2646 | if (fmt_buffer && irb) { | |
2647 | sense = dasd_get_sense(&cqr->irb); | |
2648 | memcpy(irb, &cqr->irb, sizeof(*irb)); | |
2649 | } | |
46d1c03c | 2650 | rc = -EIO; |
8fd57520 | 2651 | } |
46d1c03c JH |
2652 | list_del_init(&cqr->blocklist); |
2653 | dasd_sfree_request(cqr, device); | |
2654 | private->count--; | |
2655 | } | |
d42e1712 | 2656 | |
8fd57520 | 2657 | if (rc && rc != -EIO) |
46d1c03c | 2658 | goto out; |
8fd57520 JH |
2659 | if (rc == -EIO) { |
2660 | /* | |
2661 | * In case fewer than the expected records are on the | |
2662 | * track, we will most likely get a 'No Record Found' | |
2663 | * error (in command mode) or a 'File Protected' error | |
2664 | * (in transport mode). Those particular cases shouldn't | |
2665 | * pass the -EIO to the IOCTL, therefore reset the rc | |
2666 | * and continue. | |
2667 | */ | |
2668 | if (sense && | |
2669 | (sense[1] & SNS1_NO_REC_FOUND || | |
2670 | sense[1] & SNS1_FILE_PROTECTED)) | |
2671 | retry = 1; | |
2672 | else | |
2673 | goto out; | |
2674 | } | |
d42e1712 | 2675 | |
46d1c03c | 2676 | } while (retry); |
29b8dd9d | 2677 | |
46d1c03c JH |
2678 | out: |
2679 | fdata->start_unit = old_start; | |
2680 | fdata->stop_unit = old_stop; | |
d42e1712 SH |
2681 | |
2682 | return rc; | |
2683 | } | |
2684 | ||
570d237c JH |
2685 | static int dasd_eckd_format_device(struct dasd_device *base, |
2686 | struct format_data_t *fdata, int enable_pav) | |
2687 | { | |
8fd57520 JH |
2688 | return dasd_eckd_format_process_data(base, fdata, enable_pav, 0, NULL, |
2689 | 0, NULL); | |
2690 | } | |
2691 | ||
2692 | /* | |
2693 | * Helper function to count consecutive records of a single track. | |
2694 | */ | |
2695 | static int dasd_eckd_count_records(struct eckd_count *fmt_buffer, int start, | |
2696 | int max) | |
2697 | { | |
2698 | int head; | |
2699 | int i; | |
2700 | ||
2701 | head = fmt_buffer[start].head; | |
2702 | ||
2703 | /* | |
2704 | * There are 3 conditions where we stop counting: | |
2705 | * - if data reoccurs (same head and record may reoccur), which may | |
2706 | * happen due to the way DASD_ECKD_CCW_READ_COUNT works | |
2707 | * - when the head changes, because we're iterating over several tracks | |
2708 | * then (DASD_ECKD_CCW_READ_COUNT_MT) | |
2709 | * - when we've reached the end of sensible data in the buffer (the | |
2710 | * record will be 0 then) | |
2711 | */ | |
2712 | for (i = start; i < max; i++) { | |
2713 | if (i > start) { | |
2714 | if ((fmt_buffer[i].head == head && | |
2715 | fmt_buffer[i].record == 1) || | |
2716 | fmt_buffer[i].head != head || | |
2717 | fmt_buffer[i].record == 0) | |
2718 | break; | |
2719 | } | |
2720 | } | |
2721 | ||
2722 | return i - start; | |
2723 | } | |
2724 | ||
2725 | /* | |
2726 | * Evaluate a given range of tracks. Data like number of records, blocksize, | |
2727 | * record ids, and key length are compared with expected data. | |
2728 | * | |
2729 | * If a mismatch occurs, the corresponding error bit is set, as well as | |
2730 | * additional information, depending on the error. | |
2731 | */ | |
2732 | static void dasd_eckd_format_evaluate_tracks(struct eckd_count *fmt_buffer, | |
2733 | struct format_check_t *cdata, | |
2734 | int rpt_max, int rpt_exp, | |
2735 | int trk_per_cyl, int tpm) | |
2736 | { | |
2737 | struct ch_t geo; | |
2738 | int max_entries; | |
2739 | int count = 0; | |
2740 | int trkcount; | |
2741 | int blksize; | |
2742 | int pos = 0; | |
2743 | int i, j; | |
2744 | int kl; | |
2745 | ||
2746 | trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; | |
2747 | max_entries = trkcount * rpt_max; | |
2748 | ||
2749 | for (i = cdata->expect.start_unit; i <= cdata->expect.stop_unit; i++) { | |
2750 | /* Calculate the correct next starting position in the buffer */ | |
2751 | if (tpm) { | |
2752 | while (fmt_buffer[pos].record == 0 && | |
2753 | fmt_buffer[pos].dl == 0) { | |
2754 | if (pos++ > max_entries) | |
2755 | break; | |
2756 | } | |
2757 | } else { | |
2758 | if (i != cdata->expect.start_unit) | |
2759 | pos += rpt_max - count; | |
2760 | } | |
2761 | ||
2762 | /* Calculate the expected geo values for the current track */ | |
2763 | set_ch_t(&geo, i / trk_per_cyl, i % trk_per_cyl); | |
2764 | ||
2765 | /* Count and check number of records */ | |
2766 | count = dasd_eckd_count_records(fmt_buffer, pos, pos + rpt_max); | |
2767 | ||
2768 | if (count < rpt_exp) { | |
2769 | cdata->result = DASD_FMT_ERR_TOO_FEW_RECORDS; | |
2770 | break; | |
2771 | } | |
2772 | if (count > rpt_exp) { | |
2773 | cdata->result = DASD_FMT_ERR_TOO_MANY_RECORDS; | |
2774 | break; | |
2775 | } | |
2776 | ||
2777 | for (j = 0; j < count; j++, pos++) { | |
2778 | blksize = cdata->expect.blksize; | |
2779 | kl = 0; | |
2780 | ||
2781 | /* | |
2782 | * Set special values when checking CDL formatted | |
2783 | * devices. | |
2784 | */ | |
2785 | if ((cdata->expect.intensity & 0x08) && | |
2786 | geo.cyl == 0 && geo.head == 0) { | |
2787 | if (j < 3) { | |
2788 | blksize = sizes_trk0[j] - 4; | |
2789 | kl = 4; | |
2790 | } | |
2791 | } | |
2792 | if ((cdata->expect.intensity & 0x08) && | |
2793 | geo.cyl == 0 && geo.head == 1) { | |
2794 | blksize = LABEL_SIZE - 44; | |
2795 | kl = 44; | |
2796 | } | |
2797 | ||
2798 | /* Check blocksize */ | |
2799 | if (fmt_buffer[pos].dl != blksize) { | |
2800 | cdata->result = DASD_FMT_ERR_BLKSIZE; | |
2801 | goto out; | |
2802 | } | |
2803 | /* Check if key length is 0 */ | |
2804 | if (fmt_buffer[pos].kl != kl) { | |
2805 | cdata->result = DASD_FMT_ERR_KEY_LENGTH; | |
2806 | goto out; | |
2807 | } | |
2808 | /* Check if record_id is correct */ | |
2809 | if (fmt_buffer[pos].cyl != geo.cyl || | |
2810 | fmt_buffer[pos].head != geo.head || | |
2811 | fmt_buffer[pos].record != (j + 1)) { | |
2812 | cdata->result = DASD_FMT_ERR_RECORD_ID; | |
2813 | goto out; | |
2814 | } | |
2815 | } | |
2816 | } | |
2817 | ||
2818 | out: | |
2819 | /* | |
2820 | * In case of no errors, we need to decrease by one | |
2821 | * to get the correct positions. | |
2822 | */ | |
2823 | if (!cdata->result) { | |
2824 | i--; | |
2825 | pos--; | |
2826 | } | |
2827 | ||
2828 | cdata->unit = i; | |
2829 | cdata->num_records = count; | |
2830 | cdata->rec = fmt_buffer[pos].record; | |
2831 | cdata->blksize = fmt_buffer[pos].dl; | |
2832 | cdata->key_length = fmt_buffer[pos].kl; | |
2833 | } | |
2834 | ||
2835 | /* | |
2836 | * Check the format of a range of tracks of a DASD. | |
2837 | */ | |
2838 | static int dasd_eckd_check_device_format(struct dasd_device *base, | |
2839 | struct format_check_t *cdata, | |
2840 | int enable_pav) | |
2841 | { | |
2842 | struct dasd_eckd_private *private = base->private; | |
2843 | struct eckd_count *fmt_buffer; | |
2844 | struct irb irb; | |
2845 | int rpt_max, rpt_exp; | |
2846 | int fmt_buffer_size; | |
2847 | int trk_per_cyl; | |
2848 | int trkcount; | |
2849 | int tpm = 0; | |
2850 | int rc; | |
2851 | ||
2852 | trk_per_cyl = private->rdc_data.trk_per_cyl; | |
2853 | ||
2854 | /* Get maximum and expected amount of records per track */ | |
2855 | rpt_max = recs_per_track(&private->rdc_data, 0, 512) + 1; | |
2856 | rpt_exp = recs_per_track(&private->rdc_data, 0, cdata->expect.blksize); | |
2857 | ||
2858 | trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; | |
2859 | fmt_buffer_size = trkcount * rpt_max * sizeof(struct eckd_count); | |
2860 | ||
2861 | fmt_buffer = kzalloc(fmt_buffer_size, GFP_KERNEL | GFP_DMA); | |
2862 | if (!fmt_buffer) | |
2863 | return -ENOMEM; | |
2864 | ||
2865 | /* | |
2866 | * A certain FICON feature subset is needed to operate in transport | |
2867 | * mode. Additionally, the support for transport mode is implicitly | |
2868 | * checked by comparing the buffer size with fcx_max_data. As long as | |
2869 | * the buffer size is smaller we can operate in transport mode and | |
2870 | * process multiple tracks. If not, only one track at once is being | |
2871 | * processed using command mode. | |
2872 | */ | |
2873 | if ((private->features.feature[40] & 0x04) && | |
2874 | fmt_buffer_size <= private->fcx_max_data) | |
2875 | tpm = 1; | |
2876 | ||
2877 | rc = dasd_eckd_format_process_data(base, &cdata->expect, enable_pav, | |
2878 | tpm, fmt_buffer, rpt_max, &irb); | |
2879 | if (rc && rc != -EIO) | |
2880 | goto out; | |
2881 | if (rc == -EIO) { | |
2882 | /* | |
2883 | * If our first attempt with transport mode enabled comes back | |
2884 | * with an incorrect length error, we're going to retry the | |
2885 | * check with command mode. | |
2886 | */ | |
2887 | if (tpm && scsw_cstat(&irb.scsw) == 0x40) { | |
2888 | tpm = 0; | |
2889 | rc = dasd_eckd_format_process_data(base, &cdata->expect, | |
2890 | enable_pav, tpm, | |
2891 | fmt_buffer, rpt_max, | |
2892 | &irb); | |
2893 | if (rc) | |
2894 | goto out; | |
2895 | } else { | |
2896 | goto out; | |
2897 | } | |
2898 | } | |
2899 | ||
2900 | dasd_eckd_format_evaluate_tracks(fmt_buffer, cdata, rpt_max, rpt_exp, | |
2901 | trk_per_cyl, tpm); | |
2902 | ||
2903 | out: | |
2904 | kfree(fmt_buffer); | |
2905 | ||
2906 | return rc; | |
570d237c JH |
2907 | } |
2908 | ||
8e09f215 | 2909 | static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) |
1da177e4 | 2910 | { |
a2ace466 HR |
2911 | if (cqr->retries < 0) { |
2912 | cqr->status = DASD_CQR_FAILED; | |
2913 | return; | |
2914 | } | |
8e09f215 SW |
2915 | cqr->status = DASD_CQR_FILLED; |
2916 | if (cqr->block && (cqr->startdev != cqr->block->base)) { | |
2917 | dasd_eckd_reset_ccw_to_base_io(cqr); | |
2918 | cqr->startdev = cqr->block->base; | |
c9346151 | 2919 | cqr->lpm = dasd_path_get_opm(cqr->block->base); |
1da177e4 | 2920 | } |
8e09f215 | 2921 | }; |
1da177e4 LT |
2922 | |
2923 | static dasd_erp_fn_t | |
2924 | dasd_eckd_erp_action(struct dasd_ccw_req * cqr) | |
2925 | { | |
8e09f215 | 2926 | struct dasd_device *device = (struct dasd_device *) cqr->startdev; |
1da177e4 LT |
2927 | struct ccw_device *cdev = device->cdev; |
2928 | ||
2929 | switch (cdev->id.cu_type) { | |
2930 | case 0x3990: | |
2931 | case 0x2105: | |
2932 | case 0x2107: | |
2933 | case 0x1750: | |
2934 | return dasd_3990_erp_action; | |
2935 | case 0x9343: | |
2936 | case 0x3880: | |
2937 | default: | |
2938 | return dasd_default_erp_action; | |
2939 | } | |
2940 | } | |
2941 | ||
2942 | static dasd_erp_fn_t | |
2943 | dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) | |
2944 | { | |
2945 | return dasd_default_erp_postaction; | |
2946 | } | |
2947 | ||
5a27e60d SW |
2948 | static void dasd_eckd_check_for_device_change(struct dasd_device *device, |
2949 | struct dasd_ccw_req *cqr, | |
2950 | struct irb *irb) | |
8e09f215 SW |
2951 | { |
2952 | char mask; | |
f3eb5384 | 2953 | char *sense = NULL; |
543691a4 | 2954 | struct dasd_eckd_private *private = device->private; |
8e09f215 SW |
2955 | |
2956 | /* first of all check for state change pending interrupt */ | |
2957 | mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; | |
f3eb5384 | 2958 | if ((scsw_dstat(&irb->scsw) & mask) == mask) { |
c8d1c0ff SH |
2959 | /* |
2960 | * for alias only, not in offline processing | |
2961 | * and only if not suspended | |
2962 | */ | |
501183f2 | 2963 | if (!device->block && private->lcu && |
25e2cf1c | 2964 | device->state == DASD_STATE_ONLINE && |
c8d1c0ff SH |
2965 | !test_bit(DASD_FLAG_OFFLINE, &device->flags) && |
2966 | !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { | |
501183f2 SH |
2967 | /* schedule worker to reload device */ |
2968 | dasd_reload_device(device); | |
2969 | } | |
8e09f215 SW |
2970 | dasd_generic_handle_state_change(device); |
2971 | return; | |
2972 | } | |
2973 | ||
a5a0061f | 2974 | sense = dasd_get_sense(irb); |
5a27e60d SW |
2975 | if (!sense) |
2976 | return; | |
2977 | ||
2978 | /* summary unit check */ | |
c7a29e56 | 2979 | if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && |
a5a0061f | 2980 | (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { |
59a9ed5f SH |
2981 | if (test_and_set_bit(DASD_FLAG_SUC, &device->flags)) { |
2982 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", | |
2983 | "eckd suc: device already notified"); | |
2984 | return; | |
2985 | } | |
2986 | sense = dasd_get_sense(irb); | |
2987 | if (!sense) { | |
2988 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", | |
2989 | "eckd suc: no reason code available"); | |
2990 | clear_bit(DASD_FLAG_SUC, &device->flags); | |
2991 | return; | |
2992 | ||
2993 | } | |
2994 | private->suc_reason = sense[8]; | |
2995 | DBF_DEV_EVENT(DBF_NOTICE, device, "%s %x", | |
2996 | "eckd handle summary unit check: reason", | |
2997 | private->suc_reason); | |
2998 | dasd_get_device(device); | |
2999 | if (!schedule_work(&device->suc_work)) | |
3000 | dasd_put_device(device); | |
3001 | ||
8e09f215 SW |
3002 | return; |
3003 | } | |
3004 | ||
f60c768c | 3005 | /* service information message SIM */ |
5a27e60d | 3006 | if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && |
f3eb5384 SW |
3007 | ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { |
3008 | dasd_3990_erp_handle_sim(device, sense); | |
f60c768c SH |
3009 | return; |
3010 | } | |
3011 | ||
5a27e60d SW |
3012 | /* loss of device reservation is handled via base devices only |
3013 | * as alias devices may be used with several bases | |
3014 | */ | |
c7a29e56 SW |
3015 | if (device->block && (sense[27] & DASD_SENSE_BIT_0) && |
3016 | (sense[7] == 0x3F) && | |
5a27e60d SW |
3017 | (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && |
3018 | test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { | |
3019 | if (device->features & DASD_FEATURE_FAILONSLCK) | |
3020 | set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); | |
3021 | clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); | |
3022 | dev_err(&device->cdev->dev, | |
3023 | "The device reservation was lost\n"); | |
ada3df91 | 3024 | } |
5a27e60d | 3025 | } |
f3eb5384 SW |
3026 | |
3027 | static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( | |
3028 | struct dasd_device *startdev, | |
8e09f215 | 3029 | struct dasd_block *block, |
f3eb5384 SW |
3030 | struct request *req, |
3031 | sector_t first_rec, | |
3032 | sector_t last_rec, | |
3033 | sector_t first_trk, | |
3034 | sector_t last_trk, | |
3035 | unsigned int first_offs, | |
3036 | unsigned int last_offs, | |
3037 | unsigned int blk_per_trk, | |
3038 | unsigned int blksize) | |
1da177e4 LT |
3039 | { |
3040 | struct dasd_eckd_private *private; | |
3041 | unsigned long *idaws; | |
3042 | struct LO_eckd_data *LO_data; | |
3043 | struct dasd_ccw_req *cqr; | |
3044 | struct ccw1 *ccw; | |
5705f702 | 3045 | struct req_iterator iter; |
7988613b | 3046 | struct bio_vec bv; |
1da177e4 | 3047 | char *dst; |
f3eb5384 | 3048 | unsigned int off; |
1da177e4 | 3049 | int count, cidaw, cplength, datasize; |
f3eb5384 | 3050 | sector_t recid; |
1da177e4 | 3051 | unsigned char cmd, rcmd; |
8e09f215 SW |
3052 | int use_prefix; |
3053 | struct dasd_device *basedev; | |
1da177e4 | 3054 | |
8e09f215 | 3055 | basedev = block->base; |
543691a4 | 3056 | private = basedev->private; |
1da177e4 LT |
3057 | if (rq_data_dir(req) == READ) |
3058 | cmd = DASD_ECKD_CCW_READ_MT; | |
3059 | else if (rq_data_dir(req) == WRITE) | |
3060 | cmd = DASD_ECKD_CCW_WRITE_MT; | |
3061 | else | |
3062 | return ERR_PTR(-EINVAL); | |
f3eb5384 | 3063 | |
1da177e4 LT |
3064 | /* Check struct bio and count the number of blocks for the request. */ |
3065 | count = 0; | |
3066 | cidaw = 0; | |
5705f702 | 3067 | rq_for_each_segment(bv, req, iter) { |
7988613b | 3068 | if (bv.bv_len & (blksize - 1)) |
6c92e699 JA |
3069 | /* Eckd can only do full blocks. */ |
3070 | return ERR_PTR(-EINVAL); | |
7988613b | 3071 | count += bv.bv_len >> (block->s2b_shift + 9); |
7988613b KO |
3072 | if (idal_is_needed (page_address(bv.bv_page), bv.bv_len)) |
3073 | cidaw += bv.bv_len >> (block->s2b_shift + 9); | |
1da177e4 LT |
3074 | } |
3075 | /* Paranoia. */ | |
3076 | if (count != last_rec - first_rec + 1) | |
3077 | return ERR_PTR(-EINVAL); | |
8e09f215 SW |
3078 | |
3079 | /* use the prefix command if available */ | |
3080 | use_prefix = private->features.feature[8] & 0x01; | |
3081 | if (use_prefix) { | |
3082 | /* 1x prefix + number of blocks */ | |
3083 | cplength = 2 + count; | |
3084 | /* 1x prefix + cidaws*sizeof(long) */ | |
3085 | datasize = sizeof(struct PFX_eckd_data) + | |
3086 | sizeof(struct LO_eckd_data) + | |
3087 | cidaw * sizeof(unsigned long); | |
3088 | } else { | |
3089 | /* 1x define extent + 1x locate record + number of blocks */ | |
3090 | cplength = 2 + count; | |
3091 | /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ | |
3092 | datasize = sizeof(struct DE_eckd_data) + | |
3093 | sizeof(struct LO_eckd_data) + | |
3094 | cidaw * sizeof(unsigned long); | |
3095 | } | |
1da177e4 LT |
3096 | /* Find out the number of additional locate record ccws for cdl. */ |
3097 | if (private->uses_cdl && first_rec < 2*blk_per_trk) { | |
3098 | if (last_rec >= 2*blk_per_trk) | |
3099 | count = 2*blk_per_trk - first_rec; | |
3100 | cplength += count; | |
3101 | datasize += count*sizeof(struct LO_eckd_data); | |
3102 | } | |
3103 | /* Allocate the ccw request. */ | |
68b781fe SH |
3104 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, |
3105 | startdev); | |
1da177e4 LT |
3106 | if (IS_ERR(cqr)) |
3107 | return cqr; | |
3108 | ccw = cqr->cpaddr; | |
8e09f215 SW |
3109 | /* First ccw is define extent or prefix. */ |
3110 | if (use_prefix) { | |
3111 | if (prefix(ccw++, cqr->data, first_trk, | |
3112 | last_trk, cmd, basedev, startdev) == -EAGAIN) { | |
3113 | /* Clock not in sync and XRC is enabled. | |
3114 | * Try again later. | |
3115 | */ | |
3116 | dasd_sfree_request(cqr, startdev); | |
3117 | return ERR_PTR(-EAGAIN); | |
3118 | } | |
3119 | idaws = (unsigned long *) (cqr->data + | |
3120 | sizeof(struct PFX_eckd_data)); | |
3121 | } else { | |
3122 | if (define_extent(ccw++, cqr->data, first_trk, | |
45f186be | 3123 | last_trk, cmd, basedev, 0) == -EAGAIN) { |
8e09f215 SW |
3124 | /* Clock not in sync and XRC is enabled. |
3125 | * Try again later. | |
3126 | */ | |
3127 | dasd_sfree_request(cqr, startdev); | |
3128 | return ERR_PTR(-EAGAIN); | |
3129 | } | |
3130 | idaws = (unsigned long *) (cqr->data + | |
3131 | sizeof(struct DE_eckd_data)); | |
d54853ef | 3132 | } |
1da177e4 | 3133 | /* Build locate_record+read/write/ccws. */ |
1da177e4 LT |
3134 | LO_data = (struct LO_eckd_data *) (idaws + cidaw); |
3135 | recid = first_rec; | |
3136 | if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { | |
3137 | /* Only standard blocks so there is just one locate record. */ | |
3138 | ccw[-1].flags |= CCW_FLAG_CC; | |
3139 | locate_record(ccw++, LO_data++, first_trk, first_offs + 1, | |
8e09f215 | 3140 | last_rec - recid + 1, cmd, basedev, blksize); |
1da177e4 | 3141 | } |
5705f702 | 3142 | rq_for_each_segment(bv, req, iter) { |
7988613b | 3143 | dst = page_address(bv.bv_page) + bv.bv_offset; |
1da177e4 LT |
3144 | if (dasd_page_cache) { |
3145 | char *copy = kmem_cache_alloc(dasd_page_cache, | |
441e143e | 3146 | GFP_DMA | __GFP_NOWARN); |
1da177e4 | 3147 | if (copy && rq_data_dir(req) == WRITE) |
7988613b | 3148 | memcpy(copy + bv.bv_offset, dst, bv.bv_len); |
1da177e4 | 3149 | if (copy) |
7988613b | 3150 | dst = copy + bv.bv_offset; |
1da177e4 | 3151 | } |
7988613b | 3152 | for (off = 0; off < bv.bv_len; off += blksize) { |
1da177e4 LT |
3153 | sector_t trkid = recid; |
3154 | unsigned int recoffs = sector_div(trkid, blk_per_trk); | |
3155 | rcmd = cmd; | |
3156 | count = blksize; | |
3157 | /* Locate record for cdl special block ? */ | |
3158 | if (private->uses_cdl && recid < 2*blk_per_trk) { | |
3159 | if (dasd_eckd_cdl_special(blk_per_trk, recid)){ | |
3160 | rcmd |= 0x8; | |
3161 | count = dasd_eckd_cdl_reclen(recid); | |
ec5883ab HH |
3162 | if (count < blksize && |
3163 | rq_data_dir(req) == READ) | |
1da177e4 LT |
3164 | memset(dst + count, 0xe5, |
3165 | blksize - count); | |
3166 | } | |
3167 | ccw[-1].flags |= CCW_FLAG_CC; | |
3168 | locate_record(ccw++, LO_data++, | |
3169 | trkid, recoffs + 1, | |
8e09f215 | 3170 | 1, rcmd, basedev, count); |
1da177e4 LT |
3171 | } |
3172 | /* Locate record for standard blocks ? */ | |
3173 | if (private->uses_cdl && recid == 2*blk_per_trk) { | |
3174 | ccw[-1].flags |= CCW_FLAG_CC; | |
3175 | locate_record(ccw++, LO_data++, | |
3176 | trkid, recoffs + 1, | |
3177 | last_rec - recid + 1, | |
8e09f215 | 3178 | cmd, basedev, count); |
1da177e4 LT |
3179 | } |
3180 | /* Read/write ccw. */ | |
3181 | ccw[-1].flags |= CCW_FLAG_CC; | |
3182 | ccw->cmd_code = rcmd; | |
3183 | ccw->count = count; | |
3184 | if (idal_is_needed(dst, blksize)) { | |
3185 | ccw->cda = (__u32)(addr_t) idaws; | |
3186 | ccw->flags = CCW_FLAG_IDA; | |
3187 | idaws = idal_create_words(idaws, dst, blksize); | |
3188 | } else { | |
3189 | ccw->cda = (__u32)(addr_t) dst; | |
3190 | ccw->flags = 0; | |
3191 | } | |
3192 | ccw++; | |
3193 | dst += blksize; | |
3194 | recid++; | |
3195 | } | |
3196 | } | |
13de227b HS |
3197 | if (blk_noretry_request(req) || |
3198 | block->base->features & DASD_FEATURE_FAILFAST) | |
1c01b8a5 | 3199 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
8e09f215 SW |
3200 | cqr->startdev = startdev; |
3201 | cqr->memdev = startdev; | |
3202 | cqr->block = block; | |
7c8faa86 | 3203 | cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ |
c9346151 | 3204 | cqr->lpm = dasd_path_get_ppm(startdev); |
1f1ee9ad | 3205 | cqr->retries = startdev->default_retries; |
1aae0560 | 3206 | cqr->buildclk = get_tod_clock(); |
1da177e4 LT |
3207 | cqr->status = DASD_CQR_FILLED; |
3208 | return cqr; | |
3209 | } | |
3210 | ||
f3eb5384 SW |
3211 | static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( |
3212 | struct dasd_device *startdev, | |
3213 | struct dasd_block *block, | |
3214 | struct request *req, | |
3215 | sector_t first_rec, | |
3216 | sector_t last_rec, | |
3217 | sector_t first_trk, | |
3218 | sector_t last_trk, | |
3219 | unsigned int first_offs, | |
3220 | unsigned int last_offs, | |
3221 | unsigned int blk_per_trk, | |
3222 | unsigned int blksize) | |
3223 | { | |
f3eb5384 SW |
3224 | unsigned long *idaws; |
3225 | struct dasd_ccw_req *cqr; | |
3226 | struct ccw1 *ccw; | |
3227 | struct req_iterator iter; | |
7988613b | 3228 | struct bio_vec bv; |
f3eb5384 SW |
3229 | char *dst, *idaw_dst; |
3230 | unsigned int cidaw, cplength, datasize; | |
3231 | unsigned int tlf; | |
3232 | sector_t recid; | |
3233 | unsigned char cmd; | |
3234 | struct dasd_device *basedev; | |
3235 | unsigned int trkcount, count, count_to_trk_end; | |
3236 | unsigned int idaw_len, seg_len, part_len, len_to_track_end; | |
3237 | unsigned char new_track, end_idaw; | |
3238 | sector_t trkid; | |
3239 | unsigned int recoffs; | |
3240 | ||
3241 | basedev = block->base; | |
f3eb5384 SW |
3242 | if (rq_data_dir(req) == READ) |
3243 | cmd = DASD_ECKD_CCW_READ_TRACK_DATA; | |
3244 | else if (rq_data_dir(req) == WRITE) | |
3245 | cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; | |
3246 | else | |
3247 | return ERR_PTR(-EINVAL); | |
3248 | ||
3249 | /* Track based I/O needs IDAWs for each page, and not just for | |
3250 | * 64 bit addresses. We need additional idals for pages | |
3251 | * that get filled from two tracks, so we use the number | |
3252 | * of records as upper limit. | |
3253 | */ | |
3254 | cidaw = last_rec - first_rec + 1; | |
3255 | trkcount = last_trk - first_trk + 1; | |
3256 | ||
3257 | /* 1x prefix + one read/write ccw per track */ | |
3258 | cplength = 1 + trkcount; | |
3259 | ||
7bf76f01 | 3260 | datasize = sizeof(struct PFX_eckd_data) + cidaw * sizeof(unsigned long); |
f3eb5384 SW |
3261 | |
3262 | /* Allocate the ccw request. */ | |
68b781fe SH |
3263 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, |
3264 | startdev); | |
f3eb5384 SW |
3265 | if (IS_ERR(cqr)) |
3266 | return cqr; | |
3267 | ccw = cqr->cpaddr; | |
3268 | /* transfer length factor: how many bytes to read from the last track */ | |
3269 | if (first_trk == last_trk) | |
3270 | tlf = last_offs - first_offs + 1; | |
3271 | else | |
3272 | tlf = last_offs + 1; | |
3273 | tlf *= blksize; | |
3274 | ||
3275 | if (prefix_LRE(ccw++, cqr->data, first_trk, | |
3276 | last_trk, cmd, basedev, startdev, | |
3277 | 1 /* format */, first_offs + 1, | |
3278 | trkcount, blksize, | |
3279 | tlf) == -EAGAIN) { | |
3280 | /* Clock not in sync and XRC is enabled. | |
3281 | * Try again later. | |
3282 | */ | |
3283 | dasd_sfree_request(cqr, startdev); | |
3284 | return ERR_PTR(-EAGAIN); | |
3285 | } | |
3286 | ||
3287 | /* | |
3288 | * The translation of request into ccw programs must meet the | |
3289 | * following conditions: | |
3290 | * - all idaws but the first and the last must address full pages | |
3291 | * (or 2K blocks on 31-bit) | |
3292 | * - the scope of a ccw and it's idal ends with the track boundaries | |
3293 | */ | |
3294 | idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); | |
3295 | recid = first_rec; | |
3296 | new_track = 1; | |
3297 | end_idaw = 0; | |
3298 | len_to_track_end = 0; | |
246ccea1 | 3299 | idaw_dst = NULL; |
f3eb5384 SW |
3300 | idaw_len = 0; |
3301 | rq_for_each_segment(bv, req, iter) { | |
7988613b KO |
3302 | dst = page_address(bv.bv_page) + bv.bv_offset; |
3303 | seg_len = bv.bv_len; | |
f3eb5384 SW |
3304 | while (seg_len) { |
3305 | if (new_track) { | |
3306 | trkid = recid; | |
3307 | recoffs = sector_div(trkid, blk_per_trk); | |
3308 | count_to_trk_end = blk_per_trk - recoffs; | |
3309 | count = min((last_rec - recid + 1), | |
3310 | (sector_t)count_to_trk_end); | |
3311 | len_to_track_end = count * blksize; | |
3312 | ccw[-1].flags |= CCW_FLAG_CC; | |
3313 | ccw->cmd_code = cmd; | |
3314 | ccw->count = len_to_track_end; | |
3315 | ccw->cda = (__u32)(addr_t)idaws; | |
3316 | ccw->flags = CCW_FLAG_IDA; | |
3317 | ccw++; | |
3318 | recid += count; | |
3319 | new_track = 0; | |
52db45c3 SW |
3320 | /* first idaw for a ccw may start anywhere */ |
3321 | if (!idaw_dst) | |
3322 | idaw_dst = dst; | |
f3eb5384 | 3323 | } |
52db45c3 SW |
3324 | /* If we start a new idaw, we must make sure that it |
3325 | * starts on an IDA_BLOCK_SIZE boundary. | |
f3eb5384 SW |
3326 | * If we continue an idaw, we must make sure that the |
3327 | * current segment begins where the so far accumulated | |
3328 | * idaw ends | |
3329 | */ | |
52db45c3 SW |
3330 | if (!idaw_dst) { |
3331 | if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { | |
3332 | dasd_sfree_request(cqr, startdev); | |
3333 | return ERR_PTR(-ERANGE); | |
3334 | } else | |
3335 | idaw_dst = dst; | |
3336 | } | |
f3eb5384 SW |
3337 | if ((idaw_dst + idaw_len) != dst) { |
3338 | dasd_sfree_request(cqr, startdev); | |
3339 | return ERR_PTR(-ERANGE); | |
3340 | } | |
3341 | part_len = min(seg_len, len_to_track_end); | |
3342 | seg_len -= part_len; | |
3343 | dst += part_len; | |
3344 | idaw_len += part_len; | |
3345 | len_to_track_end -= part_len; | |
3346 | /* collected memory area ends on an IDA_BLOCK border, | |
3347 | * -> create an idaw | |
3348 | * idal_create_words will handle cases where idaw_len | |
3349 | * is larger then IDA_BLOCK_SIZE | |
3350 | */ | |
3351 | if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) | |
3352 | end_idaw = 1; | |
3353 | /* We also need to end the idaw at track end */ | |
3354 | if (!len_to_track_end) { | |
3355 | new_track = 1; | |
3356 | end_idaw = 1; | |
3357 | } | |
3358 | if (end_idaw) { | |
3359 | idaws = idal_create_words(idaws, idaw_dst, | |
3360 | idaw_len); | |
246ccea1 | 3361 | idaw_dst = NULL; |
f3eb5384 SW |
3362 | idaw_len = 0; |
3363 | end_idaw = 0; | |
3364 | } | |
3365 | } | |
3366 | } | |
3367 | ||
3368 | if (blk_noretry_request(req) || | |
3369 | block->base->features & DASD_FEATURE_FAILFAST) | |
3370 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); | |
3371 | cqr->startdev = startdev; | |
3372 | cqr->memdev = startdev; | |
3373 | cqr->block = block; | |
7c8faa86 | 3374 | cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ |
c9346151 | 3375 | cqr->lpm = dasd_path_get_ppm(startdev); |
1f1ee9ad | 3376 | cqr->retries = startdev->default_retries; |
1aae0560 | 3377 | cqr->buildclk = get_tod_clock(); |
f3eb5384 SW |
3378 | cqr->status = DASD_CQR_FILLED; |
3379 | return cqr; | |
3380 | } | |
3381 | ||
3382 | static int prepare_itcw(struct itcw *itcw, | |
3383 | unsigned int trk, unsigned int totrk, int cmd, | |
3384 | struct dasd_device *basedev, | |
3385 | struct dasd_device *startdev, | |
3386 | unsigned int rec_on_trk, int count, | |
3387 | unsigned int blksize, | |
3388 | unsigned int total_data_size, | |
3389 | unsigned int tlf, | |
3390 | unsigned int blk_per_trk) | |
3391 | { | |
3392 | struct PFX_eckd_data pfxdata; | |
3393 | struct dasd_eckd_private *basepriv, *startpriv; | |
3394 | struct DE_eckd_data *dedata; | |
3395 | struct LRE_eckd_data *lredata; | |
3396 | struct dcw *dcw; | |
3397 | ||
3398 | u32 begcyl, endcyl; | |
3399 | u16 heads, beghead, endhead; | |
3400 | u8 pfx_cmd; | |
3401 | ||
3402 | int rc = 0; | |
3403 | int sector = 0; | |
3404 | int dn, d; | |
3405 | ||
3406 | ||
3407 | /* setup prefix data */ | |
543691a4 SO |
3408 | basepriv = basedev->private; |
3409 | startpriv = startdev->private; | |
f3eb5384 SW |
3410 | dedata = &pfxdata.define_extent; |
3411 | lredata = &pfxdata.locate_record; | |
3412 | ||
3413 | memset(&pfxdata, 0, sizeof(pfxdata)); | |
3414 | pfxdata.format = 1; /* PFX with LRE */ | |
3415 | pfxdata.base_address = basepriv->ned->unit_addr; | |
3416 | pfxdata.base_lss = basepriv->ned->ID; | |
3417 | pfxdata.validity.define_extent = 1; | |
3418 | ||
3419 | /* private uid is kept up to date, conf_data may be outdated */ | |
da340f92 SH |
3420 | if (startpriv->uid.type == UA_BASE_PAV_ALIAS) |
3421 | pfxdata.validity.verify_base = 1; | |
3422 | ||
3423 | if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) { | |
f3eb5384 | 3424 | pfxdata.validity.verify_base = 1; |
da340f92 | 3425 | pfxdata.validity.hyper_pav = 1; |
f3eb5384 SW |
3426 | } |
3427 | ||
3428 | switch (cmd) { | |
3429 | case DASD_ECKD_CCW_READ_TRACK_DATA: | |
3430 | dedata->mask.perm = 0x1; | |
3431 | dedata->attributes.operation = basepriv->attrib.operation; | |
3432 | dedata->blk_size = blksize; | |
3433 | dedata->ga_extended |= 0x42; | |
3434 | lredata->operation.orientation = 0x0; | |
3435 | lredata->operation.operation = 0x0C; | |
3436 | lredata->auxiliary.check_bytes = 0x01; | |
3437 | pfx_cmd = DASD_ECKD_CCW_PFX_READ; | |
3438 | break; | |
3439 | case DASD_ECKD_CCW_WRITE_TRACK_DATA: | |
3440 | dedata->mask.perm = 0x02; | |
3441 | dedata->attributes.operation = basepriv->attrib.operation; | |
3442 | dedata->blk_size = blksize; | |
45f186be | 3443 | rc = check_XRC(NULL, dedata, basedev); |
f3eb5384 SW |
3444 | dedata->ga_extended |= 0x42; |
3445 | lredata->operation.orientation = 0x0; | |
3446 | lredata->operation.operation = 0x3F; | |
3447 | lredata->extended_operation = 0x23; | |
3448 | lredata->auxiliary.check_bytes = 0x2; | |
45f186be JH |
3449 | /* |
3450 | * If XRC is supported the System Time Stamp is set. The | |
3451 | * validity of the time stamp must be reflected in the prefix | |
3452 | * data as well. | |
3453 | */ | |
3454 | if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02) | |
3455 | pfxdata.validity.time_stamp = 1; /* 'Time Stamp Valid' */ | |
f3eb5384 SW |
3456 | pfx_cmd = DASD_ECKD_CCW_PFX; |
3457 | break; | |
8fd57520 JH |
3458 | case DASD_ECKD_CCW_READ_COUNT_MT: |
3459 | dedata->mask.perm = 0x1; | |
3460 | dedata->attributes.operation = DASD_BYPASS_CACHE; | |
3461 | dedata->ga_extended |= 0x42; | |
3462 | dedata->blk_size = blksize; | |
3463 | lredata->operation.orientation = 0x2; | |
3464 | lredata->operation.operation = 0x16; | |
3465 | lredata->auxiliary.check_bytes = 0x01; | |
3466 | pfx_cmd = DASD_ECKD_CCW_PFX_READ; | |
3467 | break; | |
f3eb5384 SW |
3468 | default: |
3469 | DBF_DEV_EVENT(DBF_ERR, basedev, | |
3470 | "prepare itcw, unknown opcode 0x%x", cmd); | |
3471 | BUG(); | |
3472 | break; | |
3473 | } | |
3474 | if (rc) | |
3475 | return rc; | |
3476 | ||
3477 | dedata->attributes.mode = 0x3; /* ECKD */ | |
3478 | ||
3479 | heads = basepriv->rdc_data.trk_per_cyl; | |
3480 | begcyl = trk / heads; | |
3481 | beghead = trk % heads; | |
3482 | endcyl = totrk / heads; | |
3483 | endhead = totrk % heads; | |
3484 | ||
3485 | /* check for sequential prestage - enhance cylinder range */ | |
3486 | if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || | |
3487 | dedata->attributes.operation == DASD_SEQ_ACCESS) { | |
3488 | ||
3489 | if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) | |
3490 | endcyl += basepriv->attrib.nr_cyl; | |
3491 | else | |
3492 | endcyl = (basepriv->real_cyl - 1); | |
3493 | } | |
3494 | ||
3495 | set_ch_t(&dedata->beg_ext, begcyl, beghead); | |
3496 | set_ch_t(&dedata->end_ext, endcyl, endhead); | |
3497 | ||
3498 | dedata->ep_format = 0x20; /* records per track is valid */ | |
3499 | dedata->ep_rec_per_track = blk_per_trk; | |
3500 | ||
3501 | if (rec_on_trk) { | |
3502 | switch (basepriv->rdc_data.dev_type) { | |
3503 | case 0x3390: | |
3504 | dn = ceil_quot(blksize + 6, 232); | |
3505 | d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); | |
3506 | sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; | |
3507 | break; | |
3508 | case 0x3380: | |
3509 | d = 7 + ceil_quot(blksize + 12, 32); | |
3510 | sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; | |
3511 | break; | |
3512 | } | |
3513 | } | |
3514 | ||
8fd57520 JH |
3515 | if (cmd == DASD_ECKD_CCW_READ_COUNT_MT) { |
3516 | lredata->auxiliary.length_valid = 0; | |
3517 | lredata->auxiliary.length_scope = 0; | |
3518 | lredata->sector = 0xff; | |
3519 | } else { | |
3520 | lredata->auxiliary.length_valid = 1; | |
3521 | lredata->auxiliary.length_scope = 1; | |
3522 | lredata->sector = sector; | |
3523 | } | |
f3eb5384 SW |
3524 | lredata->auxiliary.imbedded_ccw_valid = 1; |
3525 | lredata->length = tlf; | |
3526 | lredata->imbedded_ccw = cmd; | |
3527 | lredata->count = count; | |
f3eb5384 SW |
3528 | set_ch_t(&lredata->seek_addr, begcyl, beghead); |
3529 | lredata->search_arg.cyl = lredata->seek_addr.cyl; | |
3530 | lredata->search_arg.head = lredata->seek_addr.head; | |
3531 | lredata->search_arg.record = rec_on_trk; | |
3532 | ||
3533 | dcw = itcw_add_dcw(itcw, pfx_cmd, 0, | |
3534 | &pfxdata, sizeof(pfxdata), total_data_size); | |
82a7b955 | 3535 | return PTR_RET(dcw); |
f3eb5384 SW |
3536 | } |
3537 | ||
3538 | static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( | |
3539 | struct dasd_device *startdev, | |
3540 | struct dasd_block *block, | |
3541 | struct request *req, | |
3542 | sector_t first_rec, | |
3543 | sector_t last_rec, | |
3544 | sector_t first_trk, | |
3545 | sector_t last_trk, | |
3546 | unsigned int first_offs, | |
3547 | unsigned int last_offs, | |
3548 | unsigned int blk_per_trk, | |
3549 | unsigned int blksize) | |
3550 | { | |
f3eb5384 SW |
3551 | struct dasd_ccw_req *cqr; |
3552 | struct req_iterator iter; | |
7988613b | 3553 | struct bio_vec bv; |
f3eb5384 SW |
3554 | char *dst; |
3555 | unsigned int trkcount, ctidaw; | |
3556 | unsigned char cmd; | |
3557 | struct dasd_device *basedev; | |
3558 | unsigned int tlf; | |
3559 | struct itcw *itcw; | |
3560 | struct tidaw *last_tidaw = NULL; | |
3561 | int itcw_op; | |
3562 | size_t itcw_size; | |
ef19298b SW |
3563 | u8 tidaw_flags; |
3564 | unsigned int seg_len, part_len, len_to_track_end; | |
3565 | unsigned char new_track; | |
3566 | sector_t recid, trkid; | |
3567 | unsigned int offs; | |
3568 | unsigned int count, count_to_trk_end; | |
cd10502b | 3569 | int ret; |
f3eb5384 SW |
3570 | |
3571 | basedev = block->base; | |
f3eb5384 SW |
3572 | if (rq_data_dir(req) == READ) { |
3573 | cmd = DASD_ECKD_CCW_READ_TRACK_DATA; | |
3574 | itcw_op = ITCW_OP_READ; | |
3575 | } else if (rq_data_dir(req) == WRITE) { | |
3576 | cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; | |
3577 | itcw_op = ITCW_OP_WRITE; | |
3578 | } else | |
3579 | return ERR_PTR(-EINVAL); | |
3580 | ||
3581 | /* trackbased I/O needs address all memory via TIDAWs, | |
3582 | * not just for 64 bit addresses. This allows us to map | |
3583 | * each segment directly to one tidaw. | |
ef19298b SW |
3584 | * In the case of write requests, additional tidaws may |
3585 | * be needed when a segment crosses a track boundary. | |
f3eb5384 SW |
3586 | */ |
3587 | trkcount = last_trk - first_trk + 1; | |
3588 | ctidaw = 0; | |
3589 | rq_for_each_segment(bv, req, iter) { | |
3590 | ++ctidaw; | |
3591 | } | |
ef19298b SW |
3592 | if (rq_data_dir(req) == WRITE) |
3593 | ctidaw += (last_trk - first_trk); | |
f3eb5384 SW |
3594 | |
3595 | /* Allocate the ccw request. */ | |
3596 | itcw_size = itcw_calc_size(0, ctidaw, 0); | |
68b781fe | 3597 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); |
f3eb5384 SW |
3598 | if (IS_ERR(cqr)) |
3599 | return cqr; | |
3600 | ||
f3eb5384 SW |
3601 | /* transfer length factor: how many bytes to read from the last track */ |
3602 | if (first_trk == last_trk) | |
3603 | tlf = last_offs - first_offs + 1; | |
3604 | else | |
3605 | tlf = last_offs + 1; | |
3606 | tlf *= blksize; | |
3607 | ||
3608 | itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); | |
ef19298b | 3609 | if (IS_ERR(itcw)) { |
cd10502b JL |
3610 | ret = -EINVAL; |
3611 | goto out_error; | |
ef19298b | 3612 | } |
f3eb5384 | 3613 | cqr->cpaddr = itcw_get_tcw(itcw); |
f3eb5384 SW |
3614 | if (prepare_itcw(itcw, first_trk, last_trk, |
3615 | cmd, basedev, startdev, | |
3616 | first_offs + 1, | |
3617 | trkcount, blksize, | |
3618 | (last_rec - first_rec + 1) * blksize, | |
3619 | tlf, blk_per_trk) == -EAGAIN) { | |
3620 | /* Clock not in sync and XRC is enabled. | |
3621 | * Try again later. | |
3622 | */ | |
cd10502b JL |
3623 | ret = -EAGAIN; |
3624 | goto out_error; | |
f3eb5384 | 3625 | } |
d54cddb6 | 3626 | len_to_track_end = 0; |
f3eb5384 SW |
3627 | /* |
3628 | * A tidaw can address 4k of memory, but must not cross page boundaries | |
3629 | * We can let the block layer handle this by setting | |
3630 | * blk_queue_segment_boundary to page boundaries and | |
3631 | * blk_max_segment_size to page size when setting up the request queue. | |
ef19298b SW |
3632 | * For write requests, a TIDAW must not cross track boundaries, because |
3633 | * we have to set the CBC flag on the last tidaw for each track. | |
f3eb5384 | 3634 | */ |
ef19298b SW |
3635 | if (rq_data_dir(req) == WRITE) { |
3636 | new_track = 1; | |
3637 | recid = first_rec; | |
3638 | rq_for_each_segment(bv, req, iter) { | |
7988613b KO |
3639 | dst = page_address(bv.bv_page) + bv.bv_offset; |
3640 | seg_len = bv.bv_len; | |
ef19298b SW |
3641 | while (seg_len) { |
3642 | if (new_track) { | |
3643 | trkid = recid; | |
3644 | offs = sector_div(trkid, blk_per_trk); | |
3645 | count_to_trk_end = blk_per_trk - offs; | |
3646 | count = min((last_rec - recid + 1), | |
3647 | (sector_t)count_to_trk_end); | |
3648 | len_to_track_end = count * blksize; | |
3649 | recid += count; | |
3650 | new_track = 0; | |
3651 | } | |
3652 | part_len = min(seg_len, len_to_track_end); | |
3653 | seg_len -= part_len; | |
3654 | len_to_track_end -= part_len; | |
3655 | /* We need to end the tidaw at track end */ | |
3656 | if (!len_to_track_end) { | |
3657 | new_track = 1; | |
3658 | tidaw_flags = TIDAW_FLAGS_INSERT_CBC; | |
3659 | } else | |
3660 | tidaw_flags = 0; | |
3661 | last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, | |
3662 | dst, part_len); | |
cd10502b JL |
3663 | if (IS_ERR(last_tidaw)) { |
3664 | ret = -EINVAL; | |
3665 | goto out_error; | |
3666 | } | |
ef19298b SW |
3667 | dst += part_len; |
3668 | } | |
3669 | } | |
3670 | } else { | |
3671 | rq_for_each_segment(bv, req, iter) { | |
7988613b | 3672 | dst = page_address(bv.bv_page) + bv.bv_offset; |
ef19298b | 3673 | last_tidaw = itcw_add_tidaw(itcw, 0x00, |
7988613b | 3674 | dst, bv.bv_len); |
cd10502b JL |
3675 | if (IS_ERR(last_tidaw)) { |
3676 | ret = -EINVAL; | |
3677 | goto out_error; | |
3678 | } | |
ef19298b | 3679 | } |
f3eb5384 | 3680 | } |
ef19298b SW |
3681 | last_tidaw->flags |= TIDAW_FLAGS_LAST; |
3682 | last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; | |
f3eb5384 SW |
3683 | itcw_finalize(itcw); |
3684 | ||
3685 | if (blk_noretry_request(req) || | |
3686 | block->base->features & DASD_FEATURE_FAILFAST) | |
3687 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); | |
ef19298b | 3688 | cqr->cpmode = 1; |
f3eb5384 SW |
3689 | cqr->startdev = startdev; |
3690 | cqr->memdev = startdev; | |
3691 | cqr->block = block; | |
7c8faa86 | 3692 | cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ |
c9346151 | 3693 | cqr->lpm = dasd_path_get_ppm(startdev); |
1f1ee9ad | 3694 | cqr->retries = startdev->default_retries; |
1aae0560 | 3695 | cqr->buildclk = get_tod_clock(); |
f3eb5384 SW |
3696 | cqr->status = DASD_CQR_FILLED; |
3697 | return cqr; | |
cd10502b JL |
3698 | out_error: |
3699 | dasd_sfree_request(cqr, startdev); | |
3700 | return ERR_PTR(ret); | |
f3eb5384 SW |
3701 | } |
3702 | ||
3703 | static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, | |
3704 | struct dasd_block *block, | |
3705 | struct request *req) | |
3706 | { | |
ef19298b | 3707 | int cmdrtd, cmdwtd; |
f3eb5384 | 3708 | int use_prefix; |
ef19298b | 3709 | int fcx_multitrack; |
45b44d76 | 3710 | struct dasd_eckd_private *private; |
f3eb5384 SW |
3711 | struct dasd_device *basedev; |
3712 | sector_t first_rec, last_rec; | |
3713 | sector_t first_trk, last_trk; | |
3714 | unsigned int first_offs, last_offs; | |
3715 | unsigned int blk_per_trk, blksize; | |
3716 | int cdlspecial; | |
ef19298b | 3717 | unsigned int data_size; |
f3eb5384 SW |
3718 | struct dasd_ccw_req *cqr; |
3719 | ||
3720 | basedev = block->base; | |
543691a4 | 3721 | private = basedev->private; |
f3eb5384 SW |
3722 | |
3723 | /* Calculate number of blocks/records per track. */ | |
3724 | blksize = block->bp_block; | |
3725 | blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); | |
6fca97a9 SH |
3726 | if (blk_per_trk == 0) |
3727 | return ERR_PTR(-EINVAL); | |
f3eb5384 | 3728 | /* Calculate record id of first and last block. */ |
83096ebf | 3729 | first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; |
f3eb5384 SW |
3730 | first_offs = sector_div(first_trk, blk_per_trk); |
3731 | last_rec = last_trk = | |
83096ebf | 3732 | (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; |
f3eb5384 SW |
3733 | last_offs = sector_div(last_trk, blk_per_trk); |
3734 | cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); | |
3735 | ||
ef19298b SW |
3736 | fcx_multitrack = private->features.feature[40] & 0x20; |
3737 | data_size = blk_rq_bytes(req); | |
26a35f37 SW |
3738 | if (data_size % blksize) |
3739 | return ERR_PTR(-EINVAL); | |
ef19298b SW |
3740 | /* tpm write request add CBC data on each track boundary */ |
3741 | if (rq_data_dir(req) == WRITE) | |
3742 | data_size += (last_trk - first_trk) * 4; | |
f3eb5384 SW |
3743 | |
3744 | /* is read track data and write track data in command mode supported? */ | |
3745 | cmdrtd = private->features.feature[9] & 0x20; | |
3746 | cmdwtd = private->features.feature[12] & 0x40; | |
3747 | use_prefix = private->features.feature[8] & 0x01; | |
3748 | ||
3749 | cqr = NULL; | |
3750 | if (cdlspecial || dasd_page_cache) { | |
3751 | /* do nothing, just fall through to the cmd mode single case */ | |
ef19298b SW |
3752 | } else if ((data_size <= private->fcx_max_data) |
3753 | && (fcx_multitrack || (first_trk == last_trk))) { | |
f3eb5384 SW |
3754 | cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, |
3755 | first_rec, last_rec, | |
3756 | first_trk, last_trk, | |
3757 | first_offs, last_offs, | |
3758 | blk_per_trk, blksize); | |
ef19298b SW |
3759 | if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && |
3760 | (PTR_ERR(cqr) != -ENOMEM)) | |
f3eb5384 SW |
3761 | cqr = NULL; |
3762 | } else if (use_prefix && | |
3763 | (((rq_data_dir(req) == READ) && cmdrtd) || | |
3764 | ((rq_data_dir(req) == WRITE) && cmdwtd))) { | |
3765 | cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, | |
3766 | first_rec, last_rec, | |
3767 | first_trk, last_trk, | |
3768 | first_offs, last_offs, | |
3769 | blk_per_trk, blksize); | |
ef19298b SW |
3770 | if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && |
3771 | (PTR_ERR(cqr) != -ENOMEM)) | |
f3eb5384 SW |
3772 | cqr = NULL; |
3773 | } | |
3774 | if (!cqr) | |
3775 | cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, | |
3776 | first_rec, last_rec, | |
3777 | first_trk, last_trk, | |
3778 | first_offs, last_offs, | |
3779 | blk_per_trk, blksize); | |
3780 | return cqr; | |
3781 | } | |
3782 | ||
bbc7f7ea JH |
3783 | static struct dasd_ccw_req *dasd_eckd_build_cp_raw(struct dasd_device *startdev, |
3784 | struct dasd_block *block, | |
3785 | struct request *req) | |
e4dbb0f2 | 3786 | { |
9d2be0c1 JH |
3787 | sector_t start_padding_sectors, end_sector_offset, end_padding_sectors; |
3788 | unsigned int seg_len, len_to_track_end; | |
3789 | unsigned int cidaw, cplength, datasize; | |
3790 | sector_t first_trk, last_trk, sectors; | |
3791 | struct dasd_eckd_private *base_priv; | |
e4dbb0f2 | 3792 | struct dasd_device *basedev; |
e4dbb0f2 | 3793 | struct req_iterator iter; |
9d2be0c1 JH |
3794 | struct dasd_ccw_req *cqr; |
3795 | unsigned int first_offs; | |
3796 | unsigned int trkcount; | |
3797 | unsigned long *idaws; | |
3798 | unsigned int size; | |
3799 | unsigned char cmd; | |
7988613b | 3800 | struct bio_vec bv; |
9d2be0c1 JH |
3801 | struct ccw1 *ccw; |
3802 | int use_prefix; | |
3803 | void *data; | |
e4dbb0f2 | 3804 | char *dst; |
e4dbb0f2 SH |
3805 | |
3806 | /* | |
3807 | * raw track access needs to be mutiple of 64k and on 64k boundary | |
558b9ef0 SW |
3808 | * For read requests we can fix an incorrect alignment by padding |
3809 | * the request with dummy pages. | |
e4dbb0f2 | 3810 | */ |
558b9ef0 SW |
3811 | start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK; |
3812 | end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) % | |
3813 | DASD_RAW_SECTORS_PER_TRACK; | |
3814 | end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) % | |
3815 | DASD_RAW_SECTORS_PER_TRACK; | |
3816 | basedev = block->base; | |
3817 | if ((start_padding_sectors || end_padding_sectors) && | |
3818 | (rq_data_dir(req) == WRITE)) { | |
3819 | DBF_DEV_EVENT(DBF_ERR, basedev, | |
3820 | "raw write not track aligned (%lu,%lu) req %p", | |
3821 | start_padding_sectors, end_padding_sectors, req); | |
9d2be0c1 | 3822 | return ERR_PTR(-EINVAL); |
e4dbb0f2 SH |
3823 | } |
3824 | ||
3825 | first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; | |
3826 | last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / | |
3827 | DASD_RAW_SECTORS_PER_TRACK; | |
3828 | trkcount = last_trk - first_trk + 1; | |
3829 | first_offs = 0; | |
e4dbb0f2 SH |
3830 | |
3831 | if (rq_data_dir(req) == READ) | |
3832 | cmd = DASD_ECKD_CCW_READ_TRACK; | |
3833 | else if (rq_data_dir(req) == WRITE) | |
3834 | cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; | |
9d2be0c1 JH |
3835 | else |
3836 | return ERR_PTR(-EINVAL); | |
e4dbb0f2 SH |
3837 | |
3838 | /* | |
3839 | * Raw track based I/O needs IDAWs for each page, | |
3840 | * and not just for 64 bit addresses. | |
3841 | */ | |
3842 | cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; | |
3843 | ||
e4dbb0f2 | 3844 | /* |
9d2be0c1 JH |
3845 | * struct PFX_eckd_data and struct LRE_eckd_data can have up to 2 bytes |
3846 | * of extended parameter. This is needed for write full track. | |
e4dbb0f2 | 3847 | */ |
9d2be0c1 JH |
3848 | base_priv = basedev->private; |
3849 | use_prefix = base_priv->features.feature[8] & 0x01; | |
3850 | if (use_prefix) { | |
3851 | cplength = 1 + trkcount; | |
3852 | size = sizeof(struct PFX_eckd_data) + 2; | |
3853 | } else { | |
3854 | cplength = 2 + trkcount; | |
3855 | size = sizeof(struct DE_eckd_data) + | |
3856 | sizeof(struct LRE_eckd_data) + 2; | |
3857 | } | |
3858 | size = ALIGN(size, 8); | |
e4dbb0f2 | 3859 | |
7bf76f01 | 3860 | datasize = size + cidaw * sizeof(unsigned long); |
e4dbb0f2 SH |
3861 | |
3862 | /* Allocate the ccw request. */ | |
3863 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, | |
3864 | datasize, startdev); | |
3865 | if (IS_ERR(cqr)) | |
9d2be0c1 JH |
3866 | return cqr; |
3867 | ||
e4dbb0f2 | 3868 | ccw = cqr->cpaddr; |
9d2be0c1 | 3869 | data = cqr->data; |
e4dbb0f2 | 3870 | |
9d2be0c1 JH |
3871 | if (use_prefix) { |
3872 | prefix_LRE(ccw++, data, first_trk, last_trk, cmd, basedev, | |
3873 | startdev, 1, first_offs + 1, trkcount, 0, 0); | |
3874 | } else { | |
3875 | define_extent(ccw++, data, first_trk, last_trk, cmd, basedev, 0); | |
3876 | ccw[-1].flags |= CCW_FLAG_CC; | |
3877 | ||
3878 | data += sizeof(struct DE_eckd_data); | |
3879 | locate_record_ext(ccw++, data, first_trk, first_offs + 1, | |
3880 | trkcount, cmd, basedev, 0, 0); | |
e4dbb0f2 SH |
3881 | } |
3882 | ||
9d2be0c1 | 3883 | idaws = (unsigned long *)(cqr->data + size); |
e4dbb0f2 | 3884 | len_to_track_end = 0; |
558b9ef0 SW |
3885 | if (start_padding_sectors) { |
3886 | ccw[-1].flags |= CCW_FLAG_CC; | |
3887 | ccw->cmd_code = cmd; | |
3888 | /* maximum 3390 track size */ | |
3889 | ccw->count = 57326; | |
3890 | /* 64k map to one track */ | |
3891 | len_to_track_end = 65536 - start_padding_sectors * 512; | |
3892 | ccw->cda = (__u32)(addr_t)idaws; | |
3893 | ccw->flags |= CCW_FLAG_IDA; | |
3894 | ccw->flags |= CCW_FLAG_SLI; | |
3895 | ccw++; | |
3896 | for (sectors = 0; sectors < start_padding_sectors; sectors += 8) | |
3897 | idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); | |
3898 | } | |
e4dbb0f2 | 3899 | rq_for_each_segment(bv, req, iter) { |
7988613b KO |
3900 | dst = page_address(bv.bv_page) + bv.bv_offset; |
3901 | seg_len = bv.bv_len; | |
558b9ef0 SW |
3902 | if (cmd == DASD_ECKD_CCW_READ_TRACK) |
3903 | memset(dst, 0, seg_len); | |
e4dbb0f2 SH |
3904 | if (!len_to_track_end) { |
3905 | ccw[-1].flags |= CCW_FLAG_CC; | |
3906 | ccw->cmd_code = cmd; | |
3907 | /* maximum 3390 track size */ | |
3908 | ccw->count = 57326; | |
3909 | /* 64k map to one track */ | |
3910 | len_to_track_end = 65536; | |
3911 | ccw->cda = (__u32)(addr_t)idaws; | |
3912 | ccw->flags |= CCW_FLAG_IDA; | |
3913 | ccw->flags |= CCW_FLAG_SLI; | |
3914 | ccw++; | |
3915 | } | |
3916 | len_to_track_end -= seg_len; | |
3917 | idaws = idal_create_words(idaws, dst, seg_len); | |
3918 | } | |
558b9ef0 SW |
3919 | for (sectors = 0; sectors < end_padding_sectors; sectors += 8) |
3920 | idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); | |
e4dbb0f2 SH |
3921 | if (blk_noretry_request(req) || |
3922 | block->base->features & DASD_FEATURE_FAILFAST) | |
3923 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); | |
3924 | cqr->startdev = startdev; | |
3925 | cqr->memdev = startdev; | |
3926 | cqr->block = block; | |
3927 | cqr->expires = startdev->default_expires * HZ; | |
c9346151 | 3928 | cqr->lpm = dasd_path_get_ppm(startdev); |
1f1ee9ad | 3929 | cqr->retries = startdev->default_retries; |
1aae0560 | 3930 | cqr->buildclk = get_tod_clock(); |
e4dbb0f2 SH |
3931 | cqr->status = DASD_CQR_FILLED; |
3932 | ||
e4dbb0f2 SH |
3933 | return cqr; |
3934 | } | |
3935 | ||
3936 | ||
1da177e4 LT |
3937 | static int |
3938 | dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) | |
3939 | { | |
3940 | struct dasd_eckd_private *private; | |
3941 | struct ccw1 *ccw; | |
5705f702 | 3942 | struct req_iterator iter; |
7988613b | 3943 | struct bio_vec bv; |
1da177e4 LT |
3944 | char *dst, *cda; |
3945 | unsigned int blksize, blk_per_trk, off; | |
3946 | sector_t recid; | |
5705f702 | 3947 | int status; |
1da177e4 LT |
3948 | |
3949 | if (!dasd_page_cache) | |
3950 | goto out; | |
543691a4 | 3951 | private = cqr->block->base->private; |
8e09f215 | 3952 | blksize = cqr->block->bp_block; |
1da177e4 | 3953 | blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); |
83096ebf | 3954 | recid = blk_rq_pos(req) >> cqr->block->s2b_shift; |
1da177e4 LT |
3955 | ccw = cqr->cpaddr; |
3956 | /* Skip over define extent & locate record. */ | |
3957 | ccw++; | |
3958 | if (private->uses_cdl == 0 || recid > 2*blk_per_trk) | |
3959 | ccw++; | |
5705f702 | 3960 | rq_for_each_segment(bv, req, iter) { |
7988613b KO |
3961 | dst = page_address(bv.bv_page) + bv.bv_offset; |
3962 | for (off = 0; off < bv.bv_len; off += blksize) { | |
1da177e4 LT |
3963 | /* Skip locate record. */ |
3964 | if (private->uses_cdl && recid <= 2*blk_per_trk) | |
3965 | ccw++; | |
3966 | if (dst) { | |
3967 | if (ccw->flags & CCW_FLAG_IDA) | |
3968 | cda = *((char **)((addr_t) ccw->cda)); | |
3969 | else | |
3970 | cda = (char *)((addr_t) ccw->cda); | |
3971 | if (dst != cda) { | |
3972 | if (rq_data_dir(req) == READ) | |
7988613b | 3973 | memcpy(dst, cda, bv.bv_len); |
1da177e4 LT |
3974 | kmem_cache_free(dasd_page_cache, |
3975 | (void *)((addr_t)cda & PAGE_MASK)); | |
3976 | } | |
3977 | dst = NULL; | |
3978 | } | |
3979 | ccw++; | |
3980 | recid++; | |
3981 | } | |
3982 | } | |
3983 | out: | |
3984 | status = cqr->status == DASD_CQR_DONE; | |
8e09f215 | 3985 | dasd_sfree_request(cqr, cqr->memdev); |
1da177e4 LT |
3986 | return status; |
3987 | } | |
3988 | ||
8e09f215 | 3989 | /* |
f3eb5384 | 3990 | * Modify ccw/tcw in cqr so it can be started on a base device. |
8e09f215 SW |
3991 | * |
3992 | * Note that this is not enough to restart the cqr! | |
3993 | * Either reset cqr->startdev as well (summary unit check handling) | |
3994 | * or restart via separate cqr (as in ERP handling). | |
3995 | */ | |
3996 | void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) | |
3997 | { | |
3998 | struct ccw1 *ccw; | |
3999 | struct PFX_eckd_data *pfxdata; | |
f3eb5384 SW |
4000 | struct tcw *tcw; |
4001 | struct tccb *tccb; | |
4002 | struct dcw *dcw; | |
4003 | ||
4004 | if (cqr->cpmode == 1) { | |
4005 | tcw = cqr->cpaddr; | |
4006 | tccb = tcw_get_tccb(tcw); | |
4007 | dcw = (struct dcw *)&tccb->tca[0]; | |
4008 | pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; | |
8e09f215 SW |
4009 | pfxdata->validity.verify_base = 0; |
4010 | pfxdata->validity.hyper_pav = 0; | |
f3eb5384 SW |
4011 | } else { |
4012 | ccw = cqr->cpaddr; | |
4013 | pfxdata = cqr->data; | |
4014 | if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { | |
4015 | pfxdata->validity.verify_base = 0; | |
4016 | pfxdata->validity.hyper_pav = 0; | |
4017 | } | |
8e09f215 SW |
4018 | } |
4019 | } | |
4020 | ||
4021 | #define DASD_ECKD_CHANQ_MAX_SIZE 4 | |
4022 | ||
4023 | static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, | |
4024 | struct dasd_block *block, | |
4025 | struct request *req) | |
4026 | { | |
4027 | struct dasd_eckd_private *private; | |
4028 | struct dasd_device *startdev; | |
4029 | unsigned long flags; | |
4030 | struct dasd_ccw_req *cqr; | |
4031 | ||
4032 | startdev = dasd_alias_get_start_dev(base); | |
4033 | if (!startdev) | |
4034 | startdev = base; | |
543691a4 | 4035 | private = startdev->private; |
8e09f215 SW |
4036 | if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) |
4037 | return ERR_PTR(-EBUSY); | |
4038 | ||
4039 | spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); | |
4040 | private->count++; | |
e4dbb0f2 | 4041 | if ((base->features & DASD_FEATURE_USERAW)) |
bbc7f7ea | 4042 | cqr = dasd_eckd_build_cp_raw(startdev, block, req); |
e4dbb0f2 SH |
4043 | else |
4044 | cqr = dasd_eckd_build_cp(startdev, block, req); | |
8e09f215 SW |
4045 | if (IS_ERR(cqr)) |
4046 | private->count--; | |
4047 | spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); | |
4048 | return cqr; | |
4049 | } | |
4050 | ||
4051 | static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, | |
4052 | struct request *req) | |
4053 | { | |
4054 | struct dasd_eckd_private *private; | |
4055 | unsigned long flags; | |
4056 | ||
4057 | spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); | |
543691a4 | 4058 | private = cqr->memdev->private; |
8e09f215 SW |
4059 | private->count--; |
4060 | spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); | |
4061 | return dasd_eckd_free_cp(cqr, req); | |
4062 | } | |
4063 | ||
1da177e4 LT |
4064 | static int |
4065 | dasd_eckd_fill_info(struct dasd_device * device, | |
4066 | struct dasd_information2_t * info) | |
4067 | { | |
543691a4 | 4068 | struct dasd_eckd_private *private = device->private; |
1da177e4 | 4069 | |
1da177e4 LT |
4070 | info->label_block = 2; |
4071 | info->FBA_layout = private->uses_cdl ? 0 : 1; | |
4072 | info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; | |
543691a4 | 4073 | info->characteristics_size = sizeof(private->rdc_data); |
1da177e4 | 4074 | memcpy(info->characteristics, &private->rdc_data, |
543691a4 | 4075 | sizeof(private->rdc_data)); |
4abb08c2 SW |
4076 | info->confdata_size = min((unsigned long)private->conf_len, |
4077 | sizeof(info->configuration_data)); | |
4078 | memcpy(info->configuration_data, private->conf_data, | |
4079 | info->confdata_size); | |
1da177e4 LT |
4080 | return 0; |
4081 | } | |
4082 | ||
4083 | /* | |
4084 | * SECTION: ioctl functions for eckd devices. | |
4085 | */ | |
4086 | ||
4087 | /* | |
4088 | * Release device ioctl. | |
138c014d | 4089 | * Buils a channel programm to releases a prior reserved |
1da177e4 LT |
4090 | * (see dasd_eckd_reserve) device. |
4091 | */ | |
4092 | static int | |
1107ccfb | 4093 | dasd_eckd_release(struct dasd_device *device) |
1da177e4 | 4094 | { |
1da177e4 LT |
4095 | struct dasd_ccw_req *cqr; |
4096 | int rc; | |
f3eb5384 | 4097 | struct ccw1 *ccw; |
f932bcea | 4098 | int useglobal; |
1da177e4 LT |
4099 | |
4100 | if (!capable(CAP_SYS_ADMIN)) | |
4101 | return -EACCES; | |
4102 | ||
f932bcea | 4103 | useglobal = 0; |
68b781fe | 4104 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); |
1da177e4 | 4105 | if (IS_ERR(cqr)) { |
f932bcea SW |
4106 | mutex_lock(&dasd_reserve_mutex); |
4107 | useglobal = 1; | |
4108 | cqr = &dasd_reserve_req->cqr; | |
4109 | memset(cqr, 0, sizeof(*cqr)); | |
4110 | memset(&dasd_reserve_req->ccw, 0, | |
4111 | sizeof(dasd_reserve_req->ccw)); | |
4112 | cqr->cpaddr = &dasd_reserve_req->ccw; | |
4113 | cqr->data = &dasd_reserve_req->data; | |
4114 | cqr->magic = DASD_ECKD_MAGIC; | |
1da177e4 | 4115 | } |
f3eb5384 SW |
4116 | ccw = cqr->cpaddr; |
4117 | ccw->cmd_code = DASD_ECKD_CCW_RELEASE; | |
4118 | ccw->flags |= CCW_FLAG_SLI; | |
4119 | ccw->count = 32; | |
4120 | ccw->cda = (__u32)(addr_t) cqr->data; | |
8e09f215 SW |
4121 | cqr->startdev = device; |
4122 | cqr->memdev = device; | |
1da177e4 | 4123 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
1c01b8a5 | 4124 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
336c340b | 4125 | cqr->retries = 2; /* set retry counter to enable basic ERP */ |
1da177e4 | 4126 | cqr->expires = 2 * HZ; |
1aae0560 | 4127 | cqr->buildclk = get_tod_clock(); |
1da177e4 LT |
4128 | cqr->status = DASD_CQR_FILLED; |
4129 | ||
4130 | rc = dasd_sleep_on_immediatly(cqr); | |
5a27e60d SW |
4131 | if (!rc) |
4132 | clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); | |
1da177e4 | 4133 | |
f932bcea SW |
4134 | if (useglobal) |
4135 | mutex_unlock(&dasd_reserve_mutex); | |
4136 | else | |
4137 | dasd_sfree_request(cqr, cqr->memdev); | |
1da177e4 LT |
4138 | return rc; |
4139 | } | |
4140 | ||
4141 | /* | |
4142 | * Reserve device ioctl. | |
4143 | * Options are set to 'synchronous wait for interrupt' and | |
138c014d HH |
4144 | * 'timeout the request'. This leads to a terminate IO if |
4145 | * the interrupt is outstanding for a certain time. | |
1da177e4 LT |
4146 | */ |
4147 | static int | |
1107ccfb | 4148 | dasd_eckd_reserve(struct dasd_device *device) |
1da177e4 | 4149 | { |
1da177e4 LT |
4150 | struct dasd_ccw_req *cqr; |
4151 | int rc; | |
f3eb5384 | 4152 | struct ccw1 *ccw; |
f932bcea | 4153 | int useglobal; |
1da177e4 LT |
4154 | |
4155 | if (!capable(CAP_SYS_ADMIN)) | |
4156 | return -EACCES; | |
4157 | ||
f932bcea | 4158 | useglobal = 0; |
68b781fe | 4159 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); |
1da177e4 | 4160 | if (IS_ERR(cqr)) { |
f932bcea SW |
4161 | mutex_lock(&dasd_reserve_mutex); |
4162 | useglobal = 1; | |
4163 | cqr = &dasd_reserve_req->cqr; | |
4164 | memset(cqr, 0, sizeof(*cqr)); | |
4165 | memset(&dasd_reserve_req->ccw, 0, | |
4166 | sizeof(dasd_reserve_req->ccw)); | |
4167 | cqr->cpaddr = &dasd_reserve_req->ccw; | |
4168 | cqr->data = &dasd_reserve_req->data; | |
4169 | cqr->magic = DASD_ECKD_MAGIC; | |
1da177e4 | 4170 | } |
f3eb5384 SW |
4171 | ccw = cqr->cpaddr; |
4172 | ccw->cmd_code = DASD_ECKD_CCW_RESERVE; | |
4173 | ccw->flags |= CCW_FLAG_SLI; | |
4174 | ccw->count = 32; | |
4175 | ccw->cda = (__u32)(addr_t) cqr->data; | |
8e09f215 SW |
4176 | cqr->startdev = device; |
4177 | cqr->memdev = device; | |
1da177e4 | 4178 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
1c01b8a5 | 4179 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
336c340b | 4180 | cqr->retries = 2; /* set retry counter to enable basic ERP */ |
1da177e4 | 4181 | cqr->expires = 2 * HZ; |
1aae0560 | 4182 | cqr->buildclk = get_tod_clock(); |
1da177e4 LT |
4183 | cqr->status = DASD_CQR_FILLED; |
4184 | ||
4185 | rc = dasd_sleep_on_immediatly(cqr); | |
5a27e60d SW |
4186 | if (!rc) |
4187 | set_bit(DASD_FLAG_IS_RESERVED, &device->flags); | |
1da177e4 | 4188 | |
f932bcea SW |
4189 | if (useglobal) |
4190 | mutex_unlock(&dasd_reserve_mutex); | |
4191 | else | |
4192 | dasd_sfree_request(cqr, cqr->memdev); | |
1da177e4 LT |
4193 | return rc; |
4194 | } | |
4195 | ||
4196 | /* | |
4197 | * Steal lock ioctl - unconditional reserve device. | |
138c014d | 4198 | * Buils a channel programm to break a device's reservation. |
1da177e4 LT |
4199 | * (unconditional reserve) |
4200 | */ | |
4201 | static int | |
1107ccfb | 4202 | dasd_eckd_steal_lock(struct dasd_device *device) |
1da177e4 | 4203 | { |
1da177e4 LT |
4204 | struct dasd_ccw_req *cqr; |
4205 | int rc; | |
f3eb5384 | 4206 | struct ccw1 *ccw; |
f932bcea | 4207 | int useglobal; |
1da177e4 LT |
4208 | |
4209 | if (!capable(CAP_SYS_ADMIN)) | |
4210 | return -EACCES; | |
4211 | ||
f932bcea | 4212 | useglobal = 0; |
68b781fe | 4213 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); |
1da177e4 | 4214 | if (IS_ERR(cqr)) { |
f932bcea SW |
4215 | mutex_lock(&dasd_reserve_mutex); |
4216 | useglobal = 1; | |
4217 | cqr = &dasd_reserve_req->cqr; | |
4218 | memset(cqr, 0, sizeof(*cqr)); | |
4219 | memset(&dasd_reserve_req->ccw, 0, | |
4220 | sizeof(dasd_reserve_req->ccw)); | |
4221 | cqr->cpaddr = &dasd_reserve_req->ccw; | |
4222 | cqr->data = &dasd_reserve_req->data; | |
4223 | cqr->magic = DASD_ECKD_MAGIC; | |
1da177e4 | 4224 | } |
f3eb5384 SW |
4225 | ccw = cqr->cpaddr; |
4226 | ccw->cmd_code = DASD_ECKD_CCW_SLCK; | |
4227 | ccw->flags |= CCW_FLAG_SLI; | |
4228 | ccw->count = 32; | |
4229 | ccw->cda = (__u32)(addr_t) cqr->data; | |
8e09f215 SW |
4230 | cqr->startdev = device; |
4231 | cqr->memdev = device; | |
1da177e4 | 4232 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
1c01b8a5 | 4233 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
336c340b | 4234 | cqr->retries = 2; /* set retry counter to enable basic ERP */ |
1da177e4 | 4235 | cqr->expires = 2 * HZ; |
1aae0560 | 4236 | cqr->buildclk = get_tod_clock(); |
1da177e4 LT |
4237 | cqr->status = DASD_CQR_FILLED; |
4238 | ||
4239 | rc = dasd_sleep_on_immediatly(cqr); | |
5a27e60d SW |
4240 | if (!rc) |
4241 | set_bit(DASD_FLAG_IS_RESERVED, &device->flags); | |
1da177e4 | 4242 | |
f932bcea SW |
4243 | if (useglobal) |
4244 | mutex_unlock(&dasd_reserve_mutex); | |
4245 | else | |
4246 | dasd_sfree_request(cqr, cqr->memdev); | |
1da177e4 LT |
4247 | return rc; |
4248 | } | |
4249 | ||
196339f1 SW |
4250 | /* |
4251 | * SNID - Sense Path Group ID | |
4252 | * This ioctl may be used in situations where I/O is stalled due to | |
4253 | * a reserve, so if the normal dasd_smalloc_request fails, we use the | |
4254 | * preallocated dasd_reserve_req. | |
4255 | */ | |
4256 | static int dasd_eckd_snid(struct dasd_device *device, | |
4257 | void __user *argp) | |
4258 | { | |
4259 | struct dasd_ccw_req *cqr; | |
4260 | int rc; | |
4261 | struct ccw1 *ccw; | |
4262 | int useglobal; | |
4263 | struct dasd_snid_ioctl_data usrparm; | |
4264 | ||
4265 | if (!capable(CAP_SYS_ADMIN)) | |
4266 | return -EACCES; | |
4267 | ||
4268 | if (copy_from_user(&usrparm, argp, sizeof(usrparm))) | |
4269 | return -EFAULT; | |
4270 | ||
4271 | useglobal = 0; | |
4272 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, | |
4273 | sizeof(struct dasd_snid_data), device); | |
4274 | if (IS_ERR(cqr)) { | |
4275 | mutex_lock(&dasd_reserve_mutex); | |
4276 | useglobal = 1; | |
4277 | cqr = &dasd_reserve_req->cqr; | |
4278 | memset(cqr, 0, sizeof(*cqr)); | |
4279 | memset(&dasd_reserve_req->ccw, 0, | |
4280 | sizeof(dasd_reserve_req->ccw)); | |
4281 | cqr->cpaddr = &dasd_reserve_req->ccw; | |
4282 | cqr->data = &dasd_reserve_req->data; | |
4283 | cqr->magic = DASD_ECKD_MAGIC; | |
4284 | } | |
4285 | ccw = cqr->cpaddr; | |
4286 | ccw->cmd_code = DASD_ECKD_CCW_SNID; | |
4287 | ccw->flags |= CCW_FLAG_SLI; | |
4288 | ccw->count = 12; | |
4289 | ccw->cda = (__u32)(addr_t) cqr->data; | |
4290 | cqr->startdev = device; | |
4291 | cqr->memdev = device; | |
4292 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); | |
4293 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); | |
5a27e60d | 4294 | set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); |
196339f1 SW |
4295 | cqr->retries = 5; |
4296 | cqr->expires = 10 * HZ; | |
1aae0560 | 4297 | cqr->buildclk = get_tod_clock(); |
196339f1 SW |
4298 | cqr->status = DASD_CQR_FILLED; |
4299 | cqr->lpm = usrparm.path_mask; | |
4300 | ||
4301 | rc = dasd_sleep_on_immediatly(cqr); | |
4302 | /* verify that I/O processing didn't modify the path mask */ | |
4303 | if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) | |
4304 | rc = -EIO; | |
4305 | if (!rc) { | |
4306 | usrparm.data = *((struct dasd_snid_data *)cqr->data); | |
4307 | if (copy_to_user(argp, &usrparm, sizeof(usrparm))) | |
4308 | rc = -EFAULT; | |
4309 | } | |
4310 | ||
4311 | if (useglobal) | |
4312 | mutex_unlock(&dasd_reserve_mutex); | |
4313 | else | |
4314 | dasd_sfree_request(cqr, cqr->memdev); | |
4315 | return rc; | |
4316 | } | |
4317 | ||
1da177e4 LT |
4318 | /* |
4319 | * Read performance statistics | |
4320 | */ | |
4321 | static int | |
1107ccfb | 4322 | dasd_eckd_performance(struct dasd_device *device, void __user *argp) |
1da177e4 | 4323 | { |
1da177e4 LT |
4324 | struct dasd_psf_prssd_data *prssdp; |
4325 | struct dasd_rssd_perf_stats_t *stats; | |
4326 | struct dasd_ccw_req *cqr; | |
4327 | struct ccw1 *ccw; | |
4328 | int rc; | |
4329 | ||
68b781fe | 4330 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, |
8e09f215 SW |
4331 | (sizeof(struct dasd_psf_prssd_data) + |
4332 | sizeof(struct dasd_rssd_perf_stats_t)), | |
1da177e4 LT |
4333 | device); |
4334 | if (IS_ERR(cqr)) { | |
fc19f381 | 4335 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
1da177e4 LT |
4336 | "Could not allocate initialization request"); |
4337 | return PTR_ERR(cqr); | |
4338 | } | |
8e09f215 SW |
4339 | cqr->startdev = device; |
4340 | cqr->memdev = device; | |
1da177e4 | 4341 | cqr->retries = 0; |
eb6e199b | 4342 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
1da177e4 LT |
4343 | cqr->expires = 10 * HZ; |
4344 | ||
4345 | /* Prepare for Read Subsystem Data */ | |
4346 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
8e09f215 | 4347 | memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); |
1da177e4 | 4348 | prssdp->order = PSF_ORDER_PRSSD; |
5d67d164 | 4349 | prssdp->suborder = 0x01; /* Performance Statistics */ |
1da177e4 LT |
4350 | prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ |
4351 | ||
4352 | ccw = cqr->cpaddr; | |
4353 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
8e09f215 | 4354 | ccw->count = sizeof(struct dasd_psf_prssd_data); |
1da177e4 LT |
4355 | ccw->flags |= CCW_FLAG_CC; |
4356 | ccw->cda = (__u32)(addr_t) prssdp; | |
4357 | ||
4358 | /* Read Subsystem Data - Performance Statistics */ | |
4359 | stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); | |
8e09f215 | 4360 | memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); |
1da177e4 LT |
4361 | |
4362 | ccw++; | |
4363 | ccw->cmd_code = DASD_ECKD_CCW_RSSD; | |
8e09f215 | 4364 | ccw->count = sizeof(struct dasd_rssd_perf_stats_t); |
1da177e4 LT |
4365 | ccw->cda = (__u32)(addr_t) stats; |
4366 | ||
1aae0560 | 4367 | cqr->buildclk = get_tod_clock(); |
1da177e4 LT |
4368 | cqr->status = DASD_CQR_FILLED; |
4369 | rc = dasd_sleep_on(cqr); | |
4370 | if (rc == 0) { | |
1da177e4 LT |
4371 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; |
4372 | stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); | |
1107ccfb CH |
4373 | if (copy_to_user(argp, stats, |
4374 | sizeof(struct dasd_rssd_perf_stats_t))) | |
4375 | rc = -EFAULT; | |
1da177e4 | 4376 | } |
8e09f215 | 4377 | dasd_sfree_request(cqr, cqr->memdev); |
1da177e4 LT |
4378 | return rc; |
4379 | } | |
4380 | ||
4381 | /* | |
4382 | * Get attributes (cache operations) | |
4383 | * Returnes the cache attributes used in Define Extend (DE). | |
4384 | */ | |
4385 | static int | |
1107ccfb | 4386 | dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) |
1da177e4 | 4387 | { |
543691a4 | 4388 | struct dasd_eckd_private *private = device->private; |
1107ccfb | 4389 | struct attrib_data_t attrib = private->attrib; |
1da177e4 LT |
4390 | int rc; |
4391 | ||
4392 | if (!capable(CAP_SYS_ADMIN)) | |
4393 | return -EACCES; | |
1107ccfb | 4394 | if (!argp) |
1da177e4 LT |
4395 | return -EINVAL; |
4396 | ||
1107ccfb CH |
4397 | rc = 0; |
4398 | if (copy_to_user(argp, (long *) &attrib, | |
8e09f215 | 4399 | sizeof(struct attrib_data_t))) |
1107ccfb | 4400 | rc = -EFAULT; |
1da177e4 LT |
4401 | |
4402 | return rc; | |
4403 | } | |
4404 | ||
4405 | /* | |
4406 | * Set attributes (cache operations) | |
4407 | * Stores the attributes for cache operation to be used in Define Extend (DE). | |
4408 | */ | |
4409 | static int | |
1107ccfb | 4410 | dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) |
1da177e4 | 4411 | { |
543691a4 | 4412 | struct dasd_eckd_private *private = device->private; |
1da177e4 LT |
4413 | struct attrib_data_t attrib; |
4414 | ||
4415 | if (!capable(CAP_SYS_ADMIN)) | |
4416 | return -EACCES; | |
1107ccfb | 4417 | if (!argp) |
1da177e4 LT |
4418 | return -EINVAL; |
4419 | ||
1107ccfb | 4420 | if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) |
1da177e4 | 4421 | return -EFAULT; |
1da177e4 LT |
4422 | private->attrib = attrib; |
4423 | ||
fc19f381 SH |
4424 | dev_info(&device->cdev->dev, |
4425 | "The DASD cache mode was set to %x (%i cylinder prestage)\n", | |
4426 | private->attrib.operation, private->attrib.nr_cyl); | |
1da177e4 LT |
4427 | return 0; |
4428 | } | |
4429 | ||
ab1d848f NH |
4430 | /* |
4431 | * Issue syscall I/O to EMC Symmetrix array. | |
4432 | * CCWs are PSF and RSSD | |
4433 | */ | |
4434 | static int dasd_symm_io(struct dasd_device *device, void __user *argp) | |
4435 | { | |
4436 | struct dasd_symmio_parms usrparm; | |
4437 | char *psf_data, *rssd_result; | |
4438 | struct dasd_ccw_req *cqr; | |
4439 | struct ccw1 *ccw; | |
52898025 | 4440 | char psf0, psf1; |
ab1d848f NH |
4441 | int rc; |
4442 | ||
52898025 NH |
4443 | if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) |
4444 | return -EACCES; | |
4445 | psf0 = psf1 = 0; | |
4446 | ||
ab1d848f NH |
4447 | /* Copy parms from caller */ |
4448 | rc = -EFAULT; | |
4449 | if (copy_from_user(&usrparm, argp, sizeof(usrparm))) | |
4450 | goto out; | |
92d62891 | 4451 | if (is_compat_task()) { |
f8b06859 | 4452 | /* Make sure pointers are sane even on 31 bit. */ |
ab1d848f | 4453 | rc = -EINVAL; |
f8b06859 HC |
4454 | if ((usrparm.psf_data >> 32) != 0) |
4455 | goto out; | |
4456 | if ((usrparm.rssd_result >> 32) != 0) | |
4457 | goto out; | |
4458 | usrparm.psf_data &= 0x7fffffffULL; | |
4459 | usrparm.rssd_result &= 0x7fffffffULL; | |
ab1d848f | 4460 | } |
ab1d848f NH |
4461 | /* alloc I/O data area */ |
4462 | psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); | |
4463 | rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); | |
4464 | if (!psf_data || !rssd_result) { | |
4465 | rc = -ENOMEM; | |
4466 | goto out_free; | |
4467 | } | |
4468 | ||
4469 | /* get syscall header from user space */ | |
4470 | rc = -EFAULT; | |
4471 | if (copy_from_user(psf_data, | |
4472 | (void __user *)(unsigned long) usrparm.psf_data, | |
4473 | usrparm.psf_data_len)) | |
4474 | goto out_free; | |
52898025 NH |
4475 | psf0 = psf_data[0]; |
4476 | psf1 = psf_data[1]; | |
ab1d848f NH |
4477 | |
4478 | /* setup CCWs for PSF + RSSD */ | |
68b781fe | 4479 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device); |
ab1d848f | 4480 | if (IS_ERR(cqr)) { |
fc19f381 | 4481 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
ab1d848f NH |
4482 | "Could not allocate initialization request"); |
4483 | rc = PTR_ERR(cqr); | |
4484 | goto out_free; | |
4485 | } | |
4486 | ||
4487 | cqr->startdev = device; | |
4488 | cqr->memdev = device; | |
4489 | cqr->retries = 3; | |
4490 | cqr->expires = 10 * HZ; | |
1aae0560 | 4491 | cqr->buildclk = get_tod_clock(); |
ab1d848f NH |
4492 | cqr->status = DASD_CQR_FILLED; |
4493 | ||
4494 | /* Build the ccws */ | |
4495 | ccw = cqr->cpaddr; | |
4496 | ||
4497 | /* PSF ccw */ | |
4498 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
4499 | ccw->count = usrparm.psf_data_len; | |
4500 | ccw->flags |= CCW_FLAG_CC; | |
4501 | ccw->cda = (__u32)(addr_t) psf_data; | |
4502 | ||
4503 | ccw++; | |
4504 | ||
4505 | /* RSSD ccw */ | |
4506 | ccw->cmd_code = DASD_ECKD_CCW_RSSD; | |
4507 | ccw->count = usrparm.rssd_result_len; | |
4508 | ccw->flags = CCW_FLAG_SLI ; | |
4509 | ccw->cda = (__u32)(addr_t) rssd_result; | |
4510 | ||
4511 | rc = dasd_sleep_on(cqr); | |
4512 | if (rc) | |
4513 | goto out_sfree; | |
4514 | ||
4515 | rc = -EFAULT; | |
4516 | if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, | |
4517 | rssd_result, usrparm.rssd_result_len)) | |
4518 | goto out_sfree; | |
4519 | rc = 0; | |
4520 | ||
4521 | out_sfree: | |
4522 | dasd_sfree_request(cqr, cqr->memdev); | |
4523 | out_free: | |
4524 | kfree(rssd_result); | |
4525 | kfree(psf_data); | |
4526 | out: | |
52898025 NH |
4527 | DBF_DEV_EVENT(DBF_WARNING, device, |
4528 | "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", | |
4529 | (int) psf0, (int) psf1, rc); | |
ab1d848f NH |
4530 | return rc; |
4531 | } | |
4532 | ||
1107ccfb | 4533 | static int |
8e09f215 | 4534 | dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) |
1107ccfb | 4535 | { |
8e09f215 SW |
4536 | struct dasd_device *device = block->base; |
4537 | ||
1107ccfb CH |
4538 | switch (cmd) { |
4539 | case BIODASDGATTR: | |
4540 | return dasd_eckd_get_attrib(device, argp); | |
4541 | case BIODASDSATTR: | |
4542 | return dasd_eckd_set_attrib(device, argp); | |
4543 | case BIODASDPSRD: | |
4544 | return dasd_eckd_performance(device, argp); | |
4545 | case BIODASDRLSE: | |
4546 | return dasd_eckd_release(device); | |
4547 | case BIODASDRSRV: | |
4548 | return dasd_eckd_reserve(device); | |
4549 | case BIODASDSLCK: | |
4550 | return dasd_eckd_steal_lock(device); | |
196339f1 SW |
4551 | case BIODASDSNID: |
4552 | return dasd_eckd_snid(device, argp); | |
ab1d848f NH |
4553 | case BIODASDSYMMIO: |
4554 | return dasd_symm_io(device, argp); | |
1107ccfb | 4555 | default: |
6b79d14e | 4556 | return -ENOTTY; |
1107ccfb CH |
4557 | } |
4558 | } | |
4559 | ||
445b5b49 HH |
4560 | /* |
4561 | * Dump the range of CCWs into 'page' buffer | |
4562 | * and return number of printed chars. | |
4563 | */ | |
4d284cac | 4564 | static int |
445b5b49 HH |
4565 | dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) |
4566 | { | |
4567 | int len, count; | |
4568 | char *datap; | |
4569 | ||
4570 | len = 0; | |
4571 | while (from <= to) { | |
773bab4a | 4572 | len += sprintf(page + len, PRINTK_HEADER |
445b5b49 HH |
4573 | " CCW %p: %08X %08X DAT:", |
4574 | from, ((int *) from)[0], ((int *) from)[1]); | |
4575 | ||
4576 | /* get pointer to data (consider IDALs) */ | |
4577 | if (from->flags & CCW_FLAG_IDA) | |
4578 | datap = (char *) *((addr_t *) (addr_t) from->cda); | |
4579 | else | |
4580 | datap = (char *) ((addr_t) from->cda); | |
4581 | ||
4582 | /* dump data (max 32 bytes) */ | |
4583 | for (count = 0; count < from->count && count < 32; count++) { | |
4584 | if (count % 8 == 0) len += sprintf(page + len, " "); | |
4585 | if (count % 4 == 0) len += sprintf(page + len, " "); | |
4586 | len += sprintf(page + len, "%02x", datap[count]); | |
4587 | } | |
4588 | len += sprintf(page + len, "\n"); | |
4589 | from++; | |
4590 | } | |
4591 | return len; | |
4592 | } | |
4593 | ||
fc19f381 | 4594 | static void |
aeec92ca SH |
4595 | dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, |
4596 | char *reason) | |
fc19f381 SH |
4597 | { |
4598 | u64 *sense; | |
a5a0061f | 4599 | u64 *stat; |
aeec92ca SH |
4600 | |
4601 | sense = (u64 *) dasd_get_sense(irb); | |
a5a0061f | 4602 | stat = (u64 *) &irb->scsw; |
fc19f381 | 4603 | if (sense) { |
a5a0061f SW |
4604 | DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " |
4605 | "%016llx %016llx %016llx %016llx", | |
4606 | reason, *stat, *((u32 *) (stat + 1)), | |
ed3640b2 | 4607 | sense[0], sense[1], sense[2], sense[3]); |
fc19f381 | 4608 | } else { |
a5a0061f SW |
4609 | DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", |
4610 | reason, *stat, *((u32 *) (stat + 1)), | |
4611 | "NO VALID SENSE"); | |
fc19f381 SH |
4612 | } |
4613 | } | |
4614 | ||
1da177e4 LT |
4615 | /* |
4616 | * Print sense data and related channel program. | |
4617 | * Parts are printed because printk buffer is only 1024 bytes. | |
4618 | */ | |
f3eb5384 | 4619 | static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, |
8e09f215 | 4620 | struct dasd_ccw_req *req, struct irb *irb) |
1da177e4 LT |
4621 | { |
4622 | char *page; | |
445b5b49 HH |
4623 | struct ccw1 *first, *last, *fail, *from, *to; |
4624 | int len, sl, sct; | |
1da177e4 LT |
4625 | |
4626 | page = (char *) get_zeroed_page(GFP_ATOMIC); | |
4627 | if (page == NULL) { | |
fc19f381 SH |
4628 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
4629 | "No memory to dump sense data\n"); | |
1da177e4 LT |
4630 | return; |
4631 | } | |
445b5b49 | 4632 | /* dump the sense data */ |
773bab4a | 4633 | len = sprintf(page, PRINTK_HEADER |
1da177e4 | 4634 | " I/O status report for device %s:\n", |
2a0217d5 | 4635 | dev_name(&device->cdev->dev)); |
773bab4a | 4636 | len += sprintf(page + len, PRINTK_HEADER |
a5a0061f SW |
4637 | " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " |
4638 | "CS:%02X RC:%d\n", | |
4639 | req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), | |
4640 | scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), | |
4641 | scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), | |
4642 | req ? req->intrc : 0); | |
773bab4a | 4643 | len += sprintf(page + len, PRINTK_HEADER |
1da177e4 | 4644 | " device %s: Failing CCW: %p\n", |
2a0217d5 | 4645 | dev_name(&device->cdev->dev), |
23d805b6 | 4646 | (void *) (addr_t) irb->scsw.cmd.cpa); |
1da177e4 LT |
4647 | if (irb->esw.esw0.erw.cons) { |
4648 | for (sl = 0; sl < 4; sl++) { | |
773bab4a | 4649 | len += sprintf(page + len, PRINTK_HEADER |
1da177e4 LT |
4650 | " Sense(hex) %2d-%2d:", |
4651 | (8 * sl), ((8 * sl) + 7)); | |
4652 | ||
4653 | for (sct = 0; sct < 8; sct++) { | |
4654 | len += sprintf(page + len, " %02x", | |
4655 | irb->ecw[8 * sl + sct]); | |
4656 | } | |
4657 | len += sprintf(page + len, "\n"); | |
4658 | } | |
4659 | ||
4660 | if (irb->ecw[27] & DASD_SENSE_BIT_0) { | |
4661 | /* 24 Byte Sense Data */ | |
773bab4a | 4662 | sprintf(page + len, PRINTK_HEADER |
445b5b49 HH |
4663 | " 24 Byte: %x MSG %x, " |
4664 | "%s MSGb to SYSOP\n", | |
4665 | irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, | |
4666 | irb->ecw[1] & 0x10 ? "" : "no"); | |
1da177e4 LT |
4667 | } else { |
4668 | /* 32 Byte Sense Data */ | |
773bab4a | 4669 | sprintf(page + len, PRINTK_HEADER |
445b5b49 HH |
4670 | " 32 Byte: Format: %x " |
4671 | "Exception class %x\n", | |
4672 | irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); | |
1da177e4 LT |
4673 | } |
4674 | } else { | |
773bab4a | 4675 | sprintf(page + len, PRINTK_HEADER |
445b5b49 | 4676 | " SORRY - NO VALID SENSE AVAILABLE\n"); |
1da177e4 | 4677 | } |
773bab4a | 4678 | printk(KERN_ERR "%s", page); |
445b5b49 | 4679 | |
8e09f215 SW |
4680 | if (req) { |
4681 | /* req == NULL for unsolicited interrupts */ | |
4682 | /* dump the Channel Program (max 140 Bytes per line) */ | |
4683 | /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ | |
4684 | first = req->cpaddr; | |
4685 | for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); | |
4686 | to = min(first + 6, last); | |
773bab4a | 4687 | len = sprintf(page, PRINTK_HEADER |
8e09f215 SW |
4688 | " Related CP in req: %p\n", req); |
4689 | dasd_eckd_dump_ccw_range(first, to, page + len); | |
773bab4a | 4690 | printk(KERN_ERR "%s", page); |
1da177e4 | 4691 | |
8e09f215 SW |
4692 | /* print failing CCW area (maximum 4) */ |
4693 | /* scsw->cda is either valid or zero */ | |
4694 | len = 0; | |
4695 | from = ++to; | |
23d805b6 PO |
4696 | fail = (struct ccw1 *)(addr_t) |
4697 | irb->scsw.cmd.cpa; /* failing CCW */ | |
8e09f215 SW |
4698 | if (from < fail - 2) { |
4699 | from = fail - 2; /* there is a gap - print header */ | |
773bab4a | 4700 | len += sprintf(page, PRINTK_HEADER "......\n"); |
8e09f215 SW |
4701 | } |
4702 | to = min(fail + 1, last); | |
4703 | len += dasd_eckd_dump_ccw_range(from, to, page + len); | |
4704 | ||
4705 | /* print last CCWs (maximum 2) */ | |
4706 | from = max(from, ++to); | |
4707 | if (from < last - 1) { | |
4708 | from = last - 1; /* there is a gap - print header */ | |
773bab4a | 4709 | len += sprintf(page + len, PRINTK_HEADER "......\n"); |
8e09f215 SW |
4710 | } |
4711 | len += dasd_eckd_dump_ccw_range(from, last, page + len); | |
4712 | if (len > 0) | |
773bab4a | 4713 | printk(KERN_ERR "%s", page); |
1da177e4 | 4714 | } |
1da177e4 LT |
4715 | free_page((unsigned long) page); |
4716 | } | |
4717 | ||
f3eb5384 SW |
4718 | |
4719 | /* | |
4720 | * Print sense data from a tcw. | |
4721 | */ | |
4722 | static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, | |
4723 | struct dasd_ccw_req *req, struct irb *irb) | |
4724 | { | |
4725 | char *page; | |
4726 | int len, sl, sct, residual; | |
f3eb5384 | 4727 | struct tsb *tsb; |
ef19298b | 4728 | u8 *sense, *rcq; |
f3eb5384 SW |
4729 | |
4730 | page = (char *) get_zeroed_page(GFP_ATOMIC); | |
4731 | if (page == NULL) { | |
fc19f381 | 4732 | DBF_DEV_EVENT(DBF_WARNING, device, " %s", |
f3eb5384 SW |
4733 | "No memory to dump sense data"); |
4734 | return; | |
4735 | } | |
4736 | /* dump the sense data */ | |
773bab4a | 4737 | len = sprintf(page, PRINTK_HEADER |
f3eb5384 SW |
4738 | " I/O status report for device %s:\n", |
4739 | dev_name(&device->cdev->dev)); | |
773bab4a | 4740 | len += sprintf(page + len, PRINTK_HEADER |
a5a0061f SW |
4741 | " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " |
4742 | "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", | |
4743 | req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), | |
4744 | scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), | |
4745 | scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), | |
a521b048 SH |
4746 | irb->scsw.tm.fcxs, |
4747 | (irb->scsw.tm.ifob << 7) | irb->scsw.tm.sesq, | |
a5a0061f | 4748 | req ? req->intrc : 0); |
773bab4a | 4749 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4750 | " device %s: Failing TCW: %p\n", |
4751 | dev_name(&device->cdev->dev), | |
4752 | (void *) (addr_t) irb->scsw.tm.tcw); | |
4753 | ||
4754 | tsb = NULL; | |
4755 | sense = NULL; | |
a5a0061f | 4756 | if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) |
f3eb5384 SW |
4757 | tsb = tcw_get_tsb( |
4758 | (struct tcw *)(unsigned long)irb->scsw.tm.tcw); | |
4759 | ||
b8fde722 | 4760 | if (tsb) { |
773bab4a | 4761 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 | 4762 | " tsb->length %d\n", tsb->length); |
773bab4a | 4763 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 | 4764 | " tsb->flags %x\n", tsb->flags); |
773bab4a | 4765 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 | 4766 | " tsb->dcw_offset %d\n", tsb->dcw_offset); |
773bab4a | 4767 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4768 | " tsb->count %d\n", tsb->count); |
4769 | residual = tsb->count - 28; | |
773bab4a | 4770 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4771 | " residual %d\n", residual); |
4772 | ||
4773 | switch (tsb->flags & 0x07) { | |
4774 | case 1: /* tsa_iostat */ | |
773bab4a | 4775 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4776 | " tsb->tsa.iostat.dev_time %d\n", |
4777 | tsb->tsa.iostat.dev_time); | |
773bab4a | 4778 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4779 | " tsb->tsa.iostat.def_time %d\n", |
4780 | tsb->tsa.iostat.def_time); | |
773bab4a | 4781 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4782 | " tsb->tsa.iostat.queue_time %d\n", |
4783 | tsb->tsa.iostat.queue_time); | |
773bab4a | 4784 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4785 | " tsb->tsa.iostat.dev_busy_time %d\n", |
4786 | tsb->tsa.iostat.dev_busy_time); | |
773bab4a | 4787 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4788 | " tsb->tsa.iostat.dev_act_time %d\n", |
4789 | tsb->tsa.iostat.dev_act_time); | |
4790 | sense = tsb->tsa.iostat.sense; | |
4791 | break; | |
4792 | case 2: /* ts_ddpc */ | |
773bab4a | 4793 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 | 4794 | " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); |
ef19298b | 4795 | for (sl = 0; sl < 2; sl++) { |
773bab4a | 4796 | len += sprintf(page + len, PRINTK_HEADER |
ef19298b SW |
4797 | " tsb->tsa.ddpc.rcq %2d-%2d: ", |
4798 | (8 * sl), ((8 * sl) + 7)); | |
4799 | rcq = tsb->tsa.ddpc.rcq; | |
f3eb5384 SW |
4800 | for (sct = 0; sct < 8; sct++) { |
4801 | len += sprintf(page + len, " %02x", | |
ef19298b | 4802 | rcq[8 * sl + sct]); |
f3eb5384 SW |
4803 | } |
4804 | len += sprintf(page + len, "\n"); | |
4805 | } | |
4806 | sense = tsb->tsa.ddpc.sense; | |
4807 | break; | |
4808 | case 3: /* tsa_intrg */ | |
773bab4a | 4809 | len += sprintf(page + len, PRINTK_HEADER |
8693b914 | 4810 | " tsb->tsa.intrg.: not supported yet\n"); |
f3eb5384 SW |
4811 | break; |
4812 | } | |
4813 | ||
4814 | if (sense) { | |
4815 | for (sl = 0; sl < 4; sl++) { | |
773bab4a | 4816 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4817 | " Sense(hex) %2d-%2d:", |
4818 | (8 * sl), ((8 * sl) + 7)); | |
4819 | for (sct = 0; sct < 8; sct++) { | |
4820 | len += sprintf(page + len, " %02x", | |
4821 | sense[8 * sl + sct]); | |
4822 | } | |
4823 | len += sprintf(page + len, "\n"); | |
4824 | } | |
4825 | ||
4826 | if (sense[27] & DASD_SENSE_BIT_0) { | |
4827 | /* 24 Byte Sense Data */ | |
773bab4a | 4828 | sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4829 | " 24 Byte: %x MSG %x, " |
4830 | "%s MSGb to SYSOP\n", | |
4831 | sense[7] >> 4, sense[7] & 0x0f, | |
4832 | sense[1] & 0x10 ? "" : "no"); | |
4833 | } else { | |
4834 | /* 32 Byte Sense Data */ | |
773bab4a | 4835 | sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4836 | " 32 Byte: Format: %x " |
4837 | "Exception class %x\n", | |
4838 | sense[6] & 0x0f, sense[22] >> 4); | |
4839 | } | |
4840 | } else { | |
773bab4a | 4841 | sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4842 | " SORRY - NO VALID SENSE AVAILABLE\n"); |
4843 | } | |
4844 | } else { | |
773bab4a | 4845 | sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4846 | " SORRY - NO TSB DATA AVAILABLE\n"); |
4847 | } | |
773bab4a | 4848 | printk(KERN_ERR "%s", page); |
f3eb5384 SW |
4849 | free_page((unsigned long) page); |
4850 | } | |
4851 | ||
4852 | static void dasd_eckd_dump_sense(struct dasd_device *device, | |
4853 | struct dasd_ccw_req *req, struct irb *irb) | |
4854 | { | |
8fd57520 JH |
4855 | u8 *sense = dasd_get_sense(irb); |
4856 | ||
4857 | if (scsw_is_tm(&irb->scsw)) { | |
4858 | /* | |
4859 | * In some cases the 'File Protected' or 'Incorrect Length' | |
4860 | * error might be expected and log messages shouldn't be written | |
4861 | * then. Check if the according suppress bit is set. | |
4862 | */ | |
4863 | if (sense && (sense[1] & SNS1_FILE_PROTECTED) && | |
4864 | test_bit(DASD_CQR_SUPPRESS_FP, &req->flags)) | |
4865 | return; | |
4866 | if (scsw_cstat(&irb->scsw) == 0x40 && | |
4867 | test_bit(DASD_CQR_SUPPRESS_IL, &req->flags)) | |
4868 | return; | |
4869 | ||
f3eb5384 | 4870 | dasd_eckd_dump_sense_tcw(device, req, irb); |
8fd57520 JH |
4871 | } else { |
4872 | /* | |
ab24fbd3 SH |
4873 | * In some cases the 'Command Reject' or 'No Record Found' |
4874 | * error might be expected and log messages shouldn't be | |
4875 | * written then. Check if the according suppress bit is set. | |
8fd57520 | 4876 | */ |
ab24fbd3 SH |
4877 | if (sense && sense[0] & SNS0_CMD_REJECT && |
4878 | test_bit(DASD_CQR_SUPPRESS_CR, &req->flags)) | |
4879 | return; | |
4880 | ||
8fd57520 JH |
4881 | if (sense && sense[1] & SNS1_NO_REC_FOUND && |
4882 | test_bit(DASD_CQR_SUPPRESS_NRF, &req->flags)) | |
4883 | return; | |
4884 | ||
f3eb5384 | 4885 | dasd_eckd_dump_sense_ccw(device, req, irb); |
8fd57520 | 4886 | } |
f3eb5384 SW |
4887 | } |
4888 | ||
501183f2 | 4889 | static int dasd_eckd_pm_freeze(struct dasd_device *device) |
d41dd122 SH |
4890 | { |
4891 | /* | |
4892 | * the device should be disconnected from our LCU structure | |
4893 | * on restore we will reconnect it and reread LCU specific | |
4894 | * information like PAV support that might have changed | |
4895 | */ | |
4896 | dasd_alias_remove_device(device); | |
4897 | dasd_alias_disconnect_device_from_lcu(device); | |
4898 | ||
4899 | return 0; | |
4900 | } | |
4901 | ||
501183f2 | 4902 | static int dasd_eckd_restore_device(struct dasd_device *device) |
d41dd122 | 4903 | { |
543691a4 | 4904 | struct dasd_eckd_private *private = device->private; |
6fca97a9 | 4905 | struct dasd_eckd_characteristics temp_rdc_data; |
f9f8d02f | 4906 | int rc; |
d41dd122 | 4907 | struct dasd_uid temp_uid; |
a7602f6c | 4908 | unsigned long flags; |
ea4da6ea | 4909 | unsigned long cqr_flags = 0; |
d41dd122 | 4910 | |
d41dd122 | 4911 | /* Read Configuration Data */ |
251afd69 SH |
4912 | rc = dasd_eckd_read_conf(device); |
4913 | if (rc) { | |
4914 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, | |
4915 | "Read configuration data failed, rc=%d", rc); | |
4916 | goto out_err; | |
4917 | } | |
d41dd122 | 4918 | |
2dedf0d9 SH |
4919 | dasd_eckd_get_uid(device, &temp_uid); |
4920 | /* Generate device unique id */ | |
4921 | rc = dasd_eckd_generate_uid(device); | |
4922 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); | |
d41dd122 | 4923 | if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) |
a7602f6c SH |
4924 | dev_err(&device->cdev->dev, "The UID of the DASD has " |
4925 | "changed\n"); | |
2dedf0d9 | 4926 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
d41dd122 SH |
4927 | if (rc) |
4928 | goto out_err; | |
d41dd122 SH |
4929 | |
4930 | /* register lcu with alias handling, enable PAV if this is a new lcu */ | |
f9f8d02f SH |
4931 | rc = dasd_alias_make_device_known_to_lcu(device); |
4932 | if (rc) | |
251afd69 | 4933 | goto out_err; |
ea4da6ea SH |
4934 | |
4935 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags); | |
4936 | dasd_eckd_validate_server(device, cqr_flags); | |
f4ac1d02 SW |
4937 | |
4938 | /* RE-Read Configuration Data */ | |
251afd69 SH |
4939 | rc = dasd_eckd_read_conf(device); |
4940 | if (rc) { | |
4941 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, | |
4942 | "Read configuration data failed, rc=%d", rc); | |
4943 | goto out_err2; | |
4944 | } | |
d41dd122 SH |
4945 | |
4946 | /* Read Feature Codes */ | |
68d1e5f0 | 4947 | dasd_eckd_read_features(device); |
d41dd122 SH |
4948 | |
4949 | /* Read Device Characteristics */ | |
68b781fe | 4950 | rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, |
6fca97a9 | 4951 | &temp_rdc_data, 64); |
d41dd122 | 4952 | if (rc) { |
b8ed5dd5 SH |
4953 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, |
4954 | "Read device characteristic failed, rc=%d", rc); | |
251afd69 | 4955 | goto out_err2; |
d41dd122 | 4956 | } |
a7602f6c | 4957 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); |
6fca97a9 | 4958 | memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); |
a7602f6c | 4959 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
d41dd122 SH |
4960 | |
4961 | /* add device to alias management */ | |
4962 | dasd_alias_add_device(device); | |
4963 | ||
4964 | return 0; | |
4965 | ||
251afd69 SH |
4966 | out_err2: |
4967 | dasd_alias_disconnect_device_from_lcu(device); | |
d41dd122 | 4968 | out_err: |
e6125fba | 4969 | return -1; |
d41dd122 SH |
4970 | } |
4971 | ||
501183f2 SH |
4972 | static int dasd_eckd_reload_device(struct dasd_device *device) |
4973 | { | |
543691a4 | 4974 | struct dasd_eckd_private *private = device->private; |
501183f2 | 4975 | int rc, old_base; |
2dedf0d9 SH |
4976 | char print_uid[60]; |
4977 | struct dasd_uid uid; | |
4978 | unsigned long flags; | |
501183f2 | 4979 | |
59a9ed5f SH |
4980 | /* |
4981 | * remove device from alias handling to prevent new requests | |
4982 | * from being scheduled on the wrong alias device | |
4983 | */ | |
4984 | dasd_alias_remove_device(device); | |
4985 | ||
2dedf0d9 | 4986 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); |
501183f2 | 4987 | old_base = private->uid.base_unit_addr; |
2dedf0d9 SH |
4988 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
4989 | ||
501183f2 SH |
4990 | /* Read Configuration Data */ |
4991 | rc = dasd_eckd_read_conf(device); | |
4992 | if (rc) | |
4993 | goto out_err; | |
4994 | ||
2dedf0d9 | 4995 | rc = dasd_eckd_generate_uid(device); |
501183f2 SH |
4996 | if (rc) |
4997 | goto out_err; | |
501183f2 SH |
4998 | /* |
4999 | * update unit address configuration and | |
5000 | * add device to alias management | |
5001 | */ | |
5002 | dasd_alias_update_add_device(device); | |
5003 | ||
2dedf0d9 SH |
5004 | dasd_eckd_get_uid(device, &uid); |
5005 | ||
5006 | if (old_base != uid.base_unit_addr) { | |
5007 | if (strlen(uid.vduit) > 0) | |
5008 | snprintf(print_uid, sizeof(print_uid), | |
5009 | "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, | |
5010 | uid.ssid, uid.base_unit_addr, uid.vduit); | |
501183f2 | 5011 | else |
2dedf0d9 SH |
5012 | snprintf(print_uid, sizeof(print_uid), |
5013 | "%s.%s.%04x.%02x", uid.vendor, uid.serial, | |
5014 | uid.ssid, uid.base_unit_addr); | |
501183f2 SH |
5015 | |
5016 | dev_info(&device->cdev->dev, | |
5017 | "An Alias device was reassigned to a new base device " | |
2dedf0d9 | 5018 | "with UID: %s\n", print_uid); |
501183f2 SH |
5019 | } |
5020 | return 0; | |
5021 | ||
5022 | out_err: | |
5023 | return -1; | |
5024 | } | |
5025 | ||
5db8440c SH |
5026 | static int dasd_eckd_read_message_buffer(struct dasd_device *device, |
5027 | struct dasd_rssd_messages *messages, | |
5028 | __u8 lpum) | |
5029 | { | |
5030 | struct dasd_rssd_messages *message_buf; | |
5031 | struct dasd_psf_prssd_data *prssdp; | |
5db8440c SH |
5032 | struct dasd_ccw_req *cqr; |
5033 | struct ccw1 *ccw; | |
5034 | int rc; | |
5035 | ||
5db8440c SH |
5036 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, |
5037 | (sizeof(struct dasd_psf_prssd_data) + | |
5038 | sizeof(struct dasd_rssd_messages)), | |
5039 | device); | |
5040 | if (IS_ERR(cqr)) { | |
5041 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
5042 | "Could not allocate read message buffer request"); | |
5043 | return PTR_ERR(cqr); | |
5044 | } | |
5045 | ||
af775210 SH |
5046 | cqr->lpm = lpum; |
5047 | retry: | |
5db8440c SH |
5048 | cqr->startdev = device; |
5049 | cqr->memdev = device; | |
5050 | cqr->block = NULL; | |
5db8440c | 5051 | cqr->expires = 10 * HZ; |
5db8440c | 5052 | set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); |
b179b037 SH |
5053 | /* dasd_sleep_on_immediatly does not do complex error |
5054 | * recovery so clear erp flag and set retry counter to | |
5055 | * do basic erp */ | |
5056 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); | |
5057 | cqr->retries = 256; | |
5db8440c SH |
5058 | |
5059 | /* Prepare for Read Subsystem Data */ | |
5060 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
5061 | memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); | |
5062 | prssdp->order = PSF_ORDER_PRSSD; | |
5063 | prssdp->suborder = 0x03; /* Message Buffer */ | |
5064 | /* all other bytes of prssdp must be zero */ | |
5065 | ||
5066 | ccw = cqr->cpaddr; | |
5067 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
5068 | ccw->count = sizeof(struct dasd_psf_prssd_data); | |
5069 | ccw->flags |= CCW_FLAG_CC; | |
5070 | ccw->flags |= CCW_FLAG_SLI; | |
5071 | ccw->cda = (__u32)(addr_t) prssdp; | |
5072 | ||
5073 | /* Read Subsystem Data - message buffer */ | |
5074 | message_buf = (struct dasd_rssd_messages *) (prssdp + 1); | |
5075 | memset(message_buf, 0, sizeof(struct dasd_rssd_messages)); | |
5076 | ||
5077 | ccw++; | |
5078 | ccw->cmd_code = DASD_ECKD_CCW_RSSD; | |
5079 | ccw->count = sizeof(struct dasd_rssd_messages); | |
5080 | ccw->flags |= CCW_FLAG_SLI; | |
5081 | ccw->cda = (__u32)(addr_t) message_buf; | |
5082 | ||
5083 | cqr->buildclk = get_tod_clock(); | |
5084 | cqr->status = DASD_CQR_FILLED; | |
5085 | rc = dasd_sleep_on_immediatly(cqr); | |
5086 | if (rc == 0) { | |
5087 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
5088 | message_buf = (struct dasd_rssd_messages *) | |
5089 | (prssdp + 1); | |
5090 | memcpy(messages, message_buf, | |
5091 | sizeof(struct dasd_rssd_messages)); | |
af775210 SH |
5092 | } else if (cqr->lpm) { |
5093 | /* | |
5094 | * on z/VM we might not be able to do I/O on the requested path | |
5095 | * but instead we get the required information on any path | |
5096 | * so retry with open path mask | |
5097 | */ | |
5098 | cqr->lpm = 0; | |
5099 | goto retry; | |
5db8440c SH |
5100 | } else |
5101 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, | |
5102 | "Reading messages failed with rc=%d\n" | |
5103 | , rc); | |
5104 | dasd_sfree_request(cqr, cqr->memdev); | |
5105 | return rc; | |
5106 | } | |
5107 | ||
5a3b7b11 SH |
5108 | static int dasd_eckd_query_host_access(struct dasd_device *device, |
5109 | struct dasd_psf_query_host_access *data) | |
5110 | { | |
5111 | struct dasd_eckd_private *private = device->private; | |
5112 | struct dasd_psf_query_host_access *host_access; | |
5113 | struct dasd_psf_prssd_data *prssdp; | |
5114 | struct dasd_ccw_req *cqr; | |
5115 | struct ccw1 *ccw; | |
5116 | int rc; | |
5117 | ||
5118 | /* not available for HYPER PAV alias devices */ | |
5119 | if (!device->block && private->lcu->pav == HYPER_PAV) | |
5120 | return -EOPNOTSUPP; | |
5121 | ||
ccd53fa2 SH |
5122 | /* may not be supported by the storage server */ |
5123 | if (!(private->features.feature[14] & 0x80)) | |
5124 | return -EOPNOTSUPP; | |
5125 | ||
5a3b7b11 SH |
5126 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, |
5127 | sizeof(struct dasd_psf_prssd_data) + 1, | |
5128 | device); | |
5129 | if (IS_ERR(cqr)) { | |
5130 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
5131 | "Could not allocate read message buffer request"); | |
5132 | return PTR_ERR(cqr); | |
5133 | } | |
5134 | host_access = kzalloc(sizeof(*host_access), GFP_KERNEL | GFP_DMA); | |
5135 | if (!host_access) { | |
5136 | dasd_sfree_request(cqr, device); | |
5137 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
5138 | "Could not allocate host_access buffer"); | |
5139 | return -ENOMEM; | |
5140 | } | |
5141 | cqr->startdev = device; | |
5142 | cqr->memdev = device; | |
5143 | cqr->block = NULL; | |
5144 | cqr->retries = 256; | |
5145 | cqr->expires = 10 * HZ; | |
5146 | ||
5147 | /* Prepare for Read Subsystem Data */ | |
5148 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
5149 | memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); | |
5150 | prssdp->order = PSF_ORDER_PRSSD; | |
5151 | prssdp->suborder = PSF_SUBORDER_QHA; /* query host access */ | |
5152 | /* LSS and Volume that will be queried */ | |
5153 | prssdp->lss = private->ned->ID; | |
5154 | prssdp->volume = private->ned->unit_addr; | |
5155 | /* all other bytes of prssdp must be zero */ | |
5156 | ||
5157 | ccw = cqr->cpaddr; | |
5158 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
5159 | ccw->count = sizeof(struct dasd_psf_prssd_data); | |
5160 | ccw->flags |= CCW_FLAG_CC; | |
5161 | ccw->flags |= CCW_FLAG_SLI; | |
5162 | ccw->cda = (__u32)(addr_t) prssdp; | |
5163 | ||
5164 | /* Read Subsystem Data - query host access */ | |
5165 | ccw++; | |
5166 | ccw->cmd_code = DASD_ECKD_CCW_RSSD; | |
5167 | ccw->count = sizeof(struct dasd_psf_query_host_access); | |
5168 | ccw->flags |= CCW_FLAG_SLI; | |
5169 | ccw->cda = (__u32)(addr_t) host_access; | |
5170 | ||
5171 | cqr->buildclk = get_tod_clock(); | |
5172 | cqr->status = DASD_CQR_FILLED; | |
ab24fbd3 SH |
5173 | /* the command might not be supported, suppress error message */ |
5174 | __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); | |
f50af850 | 5175 | rc = dasd_sleep_on_interruptible(cqr); |
5a3b7b11 SH |
5176 | if (rc == 0) { |
5177 | *data = *host_access; | |
5178 | } else { | |
5179 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, | |
5180 | "Reading host access data failed with rc=%d\n", | |
5181 | rc); | |
5182 | rc = -EOPNOTSUPP; | |
5183 | } | |
5184 | ||
5185 | dasd_sfree_request(cqr, cqr->memdev); | |
5186 | kfree(host_access); | |
5187 | return rc; | |
5188 | } | |
5189 | /* | |
5190 | * return number of grouped devices | |
5191 | */ | |
5192 | static int dasd_eckd_host_access_count(struct dasd_device *device) | |
5193 | { | |
5194 | struct dasd_psf_query_host_access *access; | |
5195 | struct dasd_ckd_path_group_entry *entry; | |
5196 | struct dasd_ckd_host_information *info; | |
5197 | int count = 0; | |
5198 | int rc, i; | |
5199 | ||
5200 | access = kzalloc(sizeof(*access), GFP_NOIO); | |
5201 | if (!access) { | |
5202 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
5203 | "Could not allocate access buffer"); | |
5204 | return -ENOMEM; | |
5205 | } | |
5206 | rc = dasd_eckd_query_host_access(device, access); | |
5207 | if (rc) { | |
5208 | kfree(access); | |
5209 | return rc; | |
5210 | } | |
5211 | ||
5212 | info = (struct dasd_ckd_host_information *) | |
5213 | access->host_access_information; | |
5214 | for (i = 0; i < info->entry_count; i++) { | |
5215 | entry = (struct dasd_ckd_path_group_entry *) | |
5216 | (info->entry + i * info->entry_size); | |
5217 | if (entry->status_flags & DASD_ECKD_PG_GROUPED) | |
5218 | count++; | |
5219 | } | |
5220 | ||
5221 | kfree(access); | |
5222 | return count; | |
5223 | } | |
5224 | ||
5225 | /* | |
5226 | * write host access information to a sequential file | |
5227 | */ | |
5228 | static int dasd_hosts_print(struct dasd_device *device, struct seq_file *m) | |
5229 | { | |
5230 | struct dasd_psf_query_host_access *access; | |
5231 | struct dasd_ckd_path_group_entry *entry; | |
5232 | struct dasd_ckd_host_information *info; | |
5233 | char sysplex[9] = ""; | |
5234 | int rc, i, j; | |
5235 | ||
5236 | access = kzalloc(sizeof(*access), GFP_NOIO); | |
5237 | if (!access) { | |
5238 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
5239 | "Could not allocate access buffer"); | |
5240 | return -ENOMEM; | |
5241 | } | |
5242 | rc = dasd_eckd_query_host_access(device, access); | |
5243 | if (rc) { | |
5244 | kfree(access); | |
5245 | return rc; | |
5246 | } | |
5247 | ||
5248 | info = (struct dasd_ckd_host_information *) | |
5249 | access->host_access_information; | |
5250 | for (i = 0; i < info->entry_count; i++) { | |
5251 | entry = (struct dasd_ckd_path_group_entry *) | |
5252 | (info->entry + i * info->entry_size); | |
5253 | /* PGID */ | |
5254 | seq_puts(m, "pgid "); | |
5255 | for (j = 0; j < 11; j++) | |
5256 | seq_printf(m, "%02x", entry->pgid[j]); | |
5257 | seq_putc(m, '\n'); | |
5258 | /* FLAGS */ | |
5259 | seq_printf(m, "status_flags %02x\n", entry->status_flags); | |
5260 | /* SYSPLEX NAME */ | |
5261 | memcpy(&sysplex, &entry->sysplex_name, sizeof(sysplex) - 1); | |
5262 | EBCASC(sysplex, sizeof(sysplex)); | |
5263 | seq_printf(m, "sysplex_name %8s\n", sysplex); | |
5264 | /* SUPPORTED CYLINDER */ | |
5265 | seq_printf(m, "supported_cylinder %d\n", entry->cylinder); | |
5266 | /* TIMESTAMP */ | |
5267 | seq_printf(m, "timestamp %lu\n", (unsigned long) | |
5268 | entry->timestamp); | |
5269 | } | |
5270 | kfree(access); | |
5271 | ||
5272 | return 0; | |
5273 | } | |
5274 | ||
5db8440c SH |
5275 | /* |
5276 | * Perform Subsystem Function - CUIR response | |
5277 | */ | |
5278 | static int | |
5279 | dasd_eckd_psf_cuir_response(struct dasd_device *device, int response, | |
a521b048 | 5280 | __u32 message_id, __u8 lpum) |
5db8440c SH |
5281 | { |
5282 | struct dasd_psf_cuir_response *psf_cuir; | |
a521b048 | 5283 | int pos = pathmask_to_pos(lpum); |
5db8440c SH |
5284 | struct dasd_ccw_req *cqr; |
5285 | struct ccw1 *ccw; | |
5286 | int rc; | |
5287 | ||
5288 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , | |
5289 | sizeof(struct dasd_psf_cuir_response), | |
5290 | device); | |
5291 | ||
5292 | if (IS_ERR(cqr)) { | |
5293 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", | |
5294 | "Could not allocate PSF-CUIR request"); | |
5295 | return PTR_ERR(cqr); | |
5296 | } | |
5297 | ||
5298 | psf_cuir = (struct dasd_psf_cuir_response *)cqr->data; | |
5299 | psf_cuir->order = PSF_ORDER_CUIR_RESPONSE; | |
5300 | psf_cuir->cc = response; | |
a521b048 | 5301 | psf_cuir->chpid = device->path[pos].chpid; |
5db8440c | 5302 | psf_cuir->message_id = message_id; |
a521b048 SH |
5303 | psf_cuir->cssid = device->path[pos].cssid; |
5304 | psf_cuir->ssid = device->path[pos].ssid; | |
5db8440c SH |
5305 | ccw = cqr->cpaddr; |
5306 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
5307 | ccw->cda = (__u32)(addr_t)psf_cuir; | |
b179b037 | 5308 | ccw->flags = CCW_FLAG_SLI; |
5db8440c SH |
5309 | ccw->count = sizeof(struct dasd_psf_cuir_response); |
5310 | ||
5311 | cqr->startdev = device; | |
5312 | cqr->memdev = device; | |
5313 | cqr->block = NULL; | |
5314 | cqr->retries = 256; | |
5315 | cqr->expires = 10*HZ; | |
5316 | cqr->buildclk = get_tod_clock(); | |
5317 | cqr->status = DASD_CQR_FILLED; | |
b179b037 | 5318 | set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); |
5db8440c SH |
5319 | |
5320 | rc = dasd_sleep_on(cqr); | |
5321 | ||
5322 | dasd_sfree_request(cqr, cqr->memdev); | |
5323 | return rc; | |
5324 | } | |
5325 | ||
b179b037 SH |
5326 | /* |
5327 | * return configuration data that is referenced by record selector | |
5328 | * if a record selector is specified or per default return the | |
5329 | * conf_data pointer for the path specified by lpum | |
5330 | */ | |
5331 | static struct dasd_conf_data *dasd_eckd_get_ref_conf(struct dasd_device *device, | |
5332 | __u8 lpum, | |
5333 | struct dasd_cuir_message *cuir) | |
5db8440c | 5334 | { |
b179b037 SH |
5335 | struct dasd_conf_data *conf_data; |
5336 | int path, pos; | |
5db8440c | 5337 | |
b179b037 SH |
5338 | if (cuir->record_selector == 0) |
5339 | goto out; | |
5340 | for (path = 0x80, pos = 0; path; path >>= 1, pos++) { | |
c9346151 | 5341 | conf_data = device->path[pos].conf_data; |
b179b037 SH |
5342 | if (conf_data->gneq.record_selector == |
5343 | cuir->record_selector) | |
5344 | return conf_data; | |
5db8440c | 5345 | } |
b179b037 | 5346 | out: |
c9346151 | 5347 | return device->path[pathmask_to_pos(lpum)].conf_data; |
5db8440c SH |
5348 | } |
5349 | ||
5350 | /* | |
b179b037 SH |
5351 | * This function determines the scope of a reconfiguration request by |
5352 | * analysing the path and device selection data provided in the CUIR request. | |
5353 | * Returns a path mask containing CUIR affected paths for the give device. | |
5354 | * | |
5355 | * If the CUIR request does not contain the required information return the | |
5356 | * path mask of the path the attention message for the CUIR request was reveived | |
5357 | * on. | |
5358 | */ | |
5359 | static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum, | |
5360 | struct dasd_cuir_message *cuir) | |
5361 | { | |
5362 | struct dasd_conf_data *ref_conf_data; | |
5363 | unsigned long bitmask = 0, mask = 0; | |
b179b037 SH |
5364 | struct dasd_conf_data *conf_data; |
5365 | unsigned int pos, path; | |
5366 | char *ref_gneq, *gneq; | |
5367 | char *ref_ned, *ned; | |
5368 | int tbcpm = 0; | |
5369 | ||
5370 | /* if CUIR request does not specify the scope use the path | |
5371 | the attention message was presented on */ | |
5372 | if (!cuir->ned_map || | |
5373 | !(cuir->neq_map[0] | cuir->neq_map[1] | cuir->neq_map[2])) | |
5374 | return lpum; | |
5375 | ||
b179b037 SH |
5376 | /* get reference conf data */ |
5377 | ref_conf_data = dasd_eckd_get_ref_conf(device, lpum, cuir); | |
5378 | /* reference ned is determined by ned_map field */ | |
5379 | pos = 8 - ffs(cuir->ned_map); | |
5380 | ref_ned = (char *)&ref_conf_data->neds[pos]; | |
5381 | ref_gneq = (char *)&ref_conf_data->gneq; | |
5382 | /* transfer 24 bit neq_map to mask */ | |
5383 | mask = cuir->neq_map[2]; | |
5384 | mask |= cuir->neq_map[1] << 8; | |
5385 | mask |= cuir->neq_map[0] << 16; | |
5386 | ||
c9346151 | 5387 | for (path = 0; path < 8; path++) { |
b179b037 SH |
5388 | /* initialise data per path */ |
5389 | bitmask = mask; | |
c9346151 | 5390 | conf_data = device->path[path].conf_data; |
b179b037 SH |
5391 | pos = 8 - ffs(cuir->ned_map); |
5392 | ned = (char *) &conf_data->neds[pos]; | |
5393 | /* compare reference ned and per path ned */ | |
5394 | if (memcmp(ref_ned, ned, sizeof(*ned)) != 0) | |
5395 | continue; | |
5396 | gneq = (char *)&conf_data->gneq; | |
5397 | /* compare reference gneq and per_path gneq under | |
5398 | 24 bit mask where mask bit 0 equals byte 7 of | |
5399 | the gneq and mask bit 24 equals byte 31 */ | |
5400 | while (bitmask) { | |
5401 | pos = ffs(bitmask) - 1; | |
5402 | if (memcmp(&ref_gneq[31 - pos], &gneq[31 - pos], 1) | |
5403 | != 0) | |
5404 | break; | |
5405 | clear_bit(pos, &bitmask); | |
5406 | } | |
5407 | if (bitmask) | |
5408 | continue; | |
5409 | /* device and path match the reference values | |
5410 | add path to CUIR scope */ | |
c9346151 | 5411 | tbcpm |= 0x80 >> path; |
b179b037 SH |
5412 | } |
5413 | return tbcpm; | |
5414 | } | |
5415 | ||
5416 | static void dasd_eckd_cuir_notify_user(struct dasd_device *device, | |
a521b048 | 5417 | unsigned long paths, int action) |
b179b037 | 5418 | { |
b179b037 SH |
5419 | int pos; |
5420 | ||
5421 | while (paths) { | |
5422 | /* get position of bit in mask */ | |
a521b048 | 5423 | pos = 8 - ffs(paths); |
b179b037 | 5424 | /* get channel path descriptor from this position */ |
b179b037 | 5425 | if (action == CUIR_QUIESCE) |
a521b048 SH |
5426 | pr_warn("Service on the storage server caused path %x.%02x to go offline", |
5427 | device->path[pos].cssid, | |
5428 | device->path[pos].chpid); | |
b179b037 | 5429 | else if (action == CUIR_RESUME) |
a521b048 SH |
5430 | pr_info("Path %x.%02x is back online after service on the storage server", |
5431 | device->path[pos].cssid, | |
5432 | device->path[pos].chpid); | |
5433 | clear_bit(7 - pos, &paths); | |
b179b037 SH |
5434 | } |
5435 | } | |
5436 | ||
5437 | static int dasd_eckd_cuir_remove_path(struct dasd_device *device, __u8 lpum, | |
5438 | struct dasd_cuir_message *cuir) | |
5439 | { | |
5440 | unsigned long tbcpm; | |
5441 | ||
5442 | tbcpm = dasd_eckd_cuir_scope(device, lpum, cuir); | |
5443 | /* nothing to do if path is not in use */ | |
c9346151 | 5444 | if (!(dasd_path_get_opm(device) & tbcpm)) |
b179b037 | 5445 | return 0; |
c9346151 | 5446 | if (!(dasd_path_get_opm(device) & ~tbcpm)) { |
b179b037 SH |
5447 | /* no path would be left if the CUIR action is taken |
5448 | return error */ | |
5449 | return -EINVAL; | |
5450 | } | |
5451 | /* remove device from operational path mask */ | |
c9346151 SH |
5452 | dasd_path_remove_opm(device, tbcpm); |
5453 | dasd_path_add_cuirpm(device, tbcpm); | |
b179b037 SH |
5454 | return tbcpm; |
5455 | } | |
5456 | ||
5457 | /* | |
5458 | * walk through all devices and build a path mask to quiesce them | |
5459 | * return an error if the last path to a device would be removed | |
5db8440c SH |
5460 | * |
5461 | * if only part of the devices are quiesced and an error | |
5462 | * occurs no onlining necessary, the storage server will | |
5463 | * notify the already set offline devices again | |
5464 | */ | |
5465 | static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum, | |
b179b037 | 5466 | struct dasd_cuir_message *cuir) |
5db8440c | 5467 | { |
543691a4 | 5468 | struct dasd_eckd_private *private = device->private; |
5db8440c | 5469 | struct alias_pav_group *pavgroup, *tempgroup; |
5db8440c | 5470 | struct dasd_device *dev, *n; |
b179b037 SH |
5471 | unsigned long paths = 0; |
5472 | unsigned long flags; | |
5473 | int tbcpm; | |
5db8440c | 5474 | |
5db8440c | 5475 | /* active devices */ |
b179b037 | 5476 | list_for_each_entry_safe(dev, n, &private->lcu->active_devices, |
5db8440c | 5477 | alias_list) { |
b179b037 SH |
5478 | spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); |
5479 | tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); | |
5480 | spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); | |
5481 | if (tbcpm < 0) | |
5482 | goto out_err; | |
5483 | paths |= tbcpm; | |
5db8440c | 5484 | } |
5db8440c | 5485 | /* inactive devices */ |
b179b037 | 5486 | list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, |
5db8440c | 5487 | alias_list) { |
b179b037 SH |
5488 | spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); |
5489 | tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); | |
5490 | spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); | |
5491 | if (tbcpm < 0) | |
5492 | goto out_err; | |
5493 | paths |= tbcpm; | |
5db8440c | 5494 | } |
5db8440c SH |
5495 | /* devices in PAV groups */ |
5496 | list_for_each_entry_safe(pavgroup, tempgroup, | |
5497 | &private->lcu->grouplist, group) { | |
5498 | list_for_each_entry_safe(dev, n, &pavgroup->baselist, | |
5499 | alias_list) { | |
b179b037 SH |
5500 | spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); |
5501 | tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); | |
5502 | spin_unlock_irqrestore( | |
5503 | get_ccwdev_lock(dev->cdev), flags); | |
5504 | if (tbcpm < 0) | |
5505 | goto out_err; | |
5506 | paths |= tbcpm; | |
5db8440c SH |
5507 | } |
5508 | list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, | |
5509 | alias_list) { | |
b179b037 SH |
5510 | spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); |
5511 | tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); | |
5512 | spin_unlock_irqrestore( | |
5513 | get_ccwdev_lock(dev->cdev), flags); | |
5514 | if (tbcpm < 0) | |
5515 | goto out_err; | |
5516 | paths |= tbcpm; | |
5db8440c SH |
5517 | } |
5518 | } | |
b179b037 | 5519 | /* notify user about all paths affected by CUIR action */ |
a521b048 | 5520 | dasd_eckd_cuir_notify_user(device, paths, CUIR_QUIESCE); |
b179b037 SH |
5521 | return 0; |
5522 | out_err: | |
5523 | return tbcpm; | |
5db8440c SH |
5524 | } |
5525 | ||
5526 | static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum, | |
b179b037 | 5527 | struct dasd_cuir_message *cuir) |
5db8440c | 5528 | { |
543691a4 | 5529 | struct dasd_eckd_private *private = device->private; |
5db8440c | 5530 | struct alias_pav_group *pavgroup, *tempgroup; |
5db8440c | 5531 | struct dasd_device *dev, *n; |
b179b037 SH |
5532 | unsigned long paths = 0; |
5533 | int tbcpm; | |
5db8440c | 5534 | |
5db8440c SH |
5535 | /* |
5536 | * the path may have been added through a generic path event before | |
5537 | * only trigger path verification if the path is not already in use | |
5538 | */ | |
5db8440c SH |
5539 | list_for_each_entry_safe(dev, n, |
5540 | &private->lcu->active_devices, | |
5541 | alias_list) { | |
b179b037 SH |
5542 | tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); |
5543 | paths |= tbcpm; | |
c9346151 SH |
5544 | if (!(dasd_path_get_opm(dev) & tbcpm)) { |
5545 | dasd_path_add_tbvpm(dev, tbcpm); | |
5db8440c SH |
5546 | dasd_schedule_device_bh(dev); |
5547 | } | |
5548 | } | |
5db8440c SH |
5549 | list_for_each_entry_safe(dev, n, |
5550 | &private->lcu->inactive_devices, | |
5551 | alias_list) { | |
b179b037 SH |
5552 | tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); |
5553 | paths |= tbcpm; | |
c9346151 SH |
5554 | if (!(dasd_path_get_opm(dev) & tbcpm)) { |
5555 | dasd_path_add_tbvpm(dev, tbcpm); | |
5db8440c SH |
5556 | dasd_schedule_device_bh(dev); |
5557 | } | |
5558 | } | |
5db8440c SH |
5559 | /* devices in PAV groups */ |
5560 | list_for_each_entry_safe(pavgroup, tempgroup, | |
5561 | &private->lcu->grouplist, | |
5562 | group) { | |
5563 | list_for_each_entry_safe(dev, n, | |
5564 | &pavgroup->baselist, | |
5565 | alias_list) { | |
b179b037 SH |
5566 | tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); |
5567 | paths |= tbcpm; | |
c9346151 SH |
5568 | if (!(dasd_path_get_opm(dev) & tbcpm)) { |
5569 | dasd_path_add_tbvpm(dev, tbcpm); | |
5db8440c SH |
5570 | dasd_schedule_device_bh(dev); |
5571 | } | |
5572 | } | |
5573 | list_for_each_entry_safe(dev, n, | |
5574 | &pavgroup->aliaslist, | |
5575 | alias_list) { | |
b179b037 SH |
5576 | tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); |
5577 | paths |= tbcpm; | |
c9346151 SH |
5578 | if (!(dasd_path_get_opm(dev) & tbcpm)) { |
5579 | dasd_path_add_tbvpm(dev, tbcpm); | |
5db8440c SH |
5580 | dasd_schedule_device_bh(dev); |
5581 | } | |
5582 | } | |
5583 | } | |
b179b037 | 5584 | /* notify user about all paths affected by CUIR action */ |
a521b048 | 5585 | dasd_eckd_cuir_notify_user(device, paths, CUIR_RESUME); |
b179b037 | 5586 | return 0; |
5db8440c SH |
5587 | } |
5588 | ||
5589 | static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages, | |
5590 | __u8 lpum) | |
5591 | { | |
5592 | struct dasd_cuir_message *cuir = messages; | |
a521b048 | 5593 | int response; |
5db8440c | 5594 | |
b179b037 SH |
5595 | DBF_DEV_EVENT(DBF_WARNING, device, |
5596 | "CUIR request: %016llx %016llx %016llx %08x", | |
5597 | ((u64 *)cuir)[0], ((u64 *)cuir)[1], ((u64 *)cuir)[2], | |
5598 | ((u32 *)cuir)[3]); | |
5db8440c SH |
5599 | |
5600 | if (cuir->code == CUIR_QUIESCE) { | |
5601 | /* quiesce */ | |
a521b048 | 5602 | if (dasd_eckd_cuir_quiesce(device, lpum, cuir)) |
b179b037 SH |
5603 | response = PSF_CUIR_LAST_PATH; |
5604 | else | |
5605 | response = PSF_CUIR_COMPLETED; | |
5db8440c SH |
5606 | } else if (cuir->code == CUIR_RESUME) { |
5607 | /* resume */ | |
a521b048 | 5608 | dasd_eckd_cuir_resume(device, lpum, cuir); |
b179b037 | 5609 | response = PSF_CUIR_COMPLETED; |
5db8440c SH |
5610 | } else |
5611 | response = PSF_CUIR_NOT_SUPPORTED; | |
5612 | ||
b179b037 | 5613 | dasd_eckd_psf_cuir_response(device, response, |
a521b048 | 5614 | cuir->message_id, lpum); |
b179b037 SH |
5615 | DBF_DEV_EVENT(DBF_WARNING, device, |
5616 | "CUIR response: %d on message ID %08x", response, | |
5617 | cuir->message_id); | |
b179b037 SH |
5618 | /* to make sure there is no attention left schedule work again */ |
5619 | device->discipline->check_attention(device, lpum); | |
5db8440c SH |
5620 | } |
5621 | ||
5622 | static void dasd_eckd_check_attention_work(struct work_struct *work) | |
5623 | { | |
5624 | struct check_attention_work_data *data; | |
5625 | struct dasd_rssd_messages *messages; | |
5626 | struct dasd_device *device; | |
5627 | int rc; | |
5628 | ||
5629 | data = container_of(work, struct check_attention_work_data, worker); | |
5630 | device = data->device; | |
5db8440c SH |
5631 | messages = kzalloc(sizeof(*messages), GFP_KERNEL); |
5632 | if (!messages) { | |
5633 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", | |
5634 | "Could not allocate attention message buffer"); | |
5635 | goto out; | |
5636 | } | |
5db8440c SH |
5637 | rc = dasd_eckd_read_message_buffer(device, messages, data->lpum); |
5638 | if (rc) | |
5639 | goto out; | |
5db8440c SH |
5640 | if (messages->length == ATTENTION_LENGTH_CUIR && |
5641 | messages->format == ATTENTION_FORMAT_CUIR) | |
5642 | dasd_eckd_handle_cuir(device, messages, data->lpum); | |
5db8440c SH |
5643 | out: |
5644 | dasd_put_device(device); | |
5645 | kfree(messages); | |
5646 | kfree(data); | |
5647 | } | |
5648 | ||
5649 | static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum) | |
5650 | { | |
5651 | struct check_attention_work_data *data; | |
5652 | ||
5653 | data = kzalloc(sizeof(*data), GFP_ATOMIC); | |
5654 | if (!data) | |
5655 | return -ENOMEM; | |
5656 | INIT_WORK(&data->worker, dasd_eckd_check_attention_work); | |
5657 | dasd_get_device(device); | |
5658 | data->device = device; | |
5659 | data->lpum = lpum; | |
5660 | schedule_work(&data->worker); | |
5661 | return 0; | |
5662 | } | |
5663 | ||
a521b048 SH |
5664 | static int dasd_eckd_disable_hpf_path(struct dasd_device *device, __u8 lpum) |
5665 | { | |
5666 | if (~lpum & dasd_path_get_opm(device)) { | |
5667 | dasd_path_add_nohpfpm(device, lpum); | |
5668 | dasd_path_remove_opm(device, lpum); | |
5669 | dev_err(&device->cdev->dev, | |
5670 | "Channel path %02X lost HPF functionality and is disabled\n", | |
5671 | lpum); | |
5672 | return 1; | |
5673 | } | |
5674 | return 0; | |
5675 | } | |
5676 | ||
5677 | static void dasd_eckd_disable_hpf_device(struct dasd_device *device) | |
5678 | { | |
5679 | struct dasd_eckd_private *private = device->private; | |
5680 | ||
5681 | dev_err(&device->cdev->dev, | |
5682 | "High Performance FICON disabled\n"); | |
5683 | private->fcx_max_data = 0; | |
5684 | } | |
5685 | ||
5686 | static int dasd_eckd_hpf_enabled(struct dasd_device *device) | |
5687 | { | |
5688 | struct dasd_eckd_private *private = device->private; | |
5689 | ||
5690 | return private->fcx_max_data ? 1 : 0; | |
5691 | } | |
5692 | ||
5693 | static void dasd_eckd_handle_hpf_error(struct dasd_device *device, | |
5694 | struct irb *irb) | |
5695 | { | |
5696 | struct dasd_eckd_private *private = device->private; | |
5697 | ||
5698 | if (!private->fcx_max_data) { | |
5699 | /* sanity check for no HPF, the error makes no sense */ | |
5700 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", | |
5701 | "Trying to disable HPF for a non HPF device"); | |
5702 | return; | |
5703 | } | |
5704 | if (irb->scsw.tm.sesq == SCSW_SESQ_DEV_NOFCX) { | |
5705 | dasd_eckd_disable_hpf_device(device); | |
5706 | } else if (irb->scsw.tm.sesq == SCSW_SESQ_PATH_NOFCX) { | |
5707 | if (dasd_eckd_disable_hpf_path(device, irb->esw.esw1.lpum)) | |
5708 | return; | |
5709 | dasd_eckd_disable_hpf_device(device); | |
5710 | dasd_path_set_tbvpm(device, | |
5711 | dasd_path_get_hpfpm(device)); | |
5712 | } | |
5713 | /* | |
5714 | * prevent that any new I/O ist started on the device and schedule a | |
5715 | * requeue of existing requests | |
5716 | */ | |
5717 | dasd_device_set_stop_bits(device, DASD_STOPPED_NOT_ACC); | |
5718 | dasd_schedule_requeue(device); | |
5719 | } | |
5720 | ||
d41dd122 | 5721 | static struct ccw_driver dasd_eckd_driver = { |
3bda058b SO |
5722 | .driver = { |
5723 | .name = "dasd-eckd", | |
5724 | .owner = THIS_MODULE, | |
5725 | }, | |
d41dd122 SH |
5726 | .ids = dasd_eckd_ids, |
5727 | .probe = dasd_eckd_probe, | |
5728 | .remove = dasd_generic_remove, | |
5729 | .set_offline = dasd_generic_set_offline, | |
5730 | .set_online = dasd_eckd_set_online, | |
5731 | .notify = dasd_generic_notify, | |
a4d26c6a | 5732 | .path_event = dasd_generic_path_event, |
4679e893 | 5733 | .shutdown = dasd_generic_shutdown, |
d41dd122 SH |
5734 | .freeze = dasd_generic_pm_freeze, |
5735 | .thaw = dasd_generic_restore_device, | |
5736 | .restore = dasd_generic_restore_device, | |
a23ed009 | 5737 | .uc_handler = dasd_generic_uc_handler, |
420f42ec | 5738 | .int_class = IRQIO_DAS, |
d41dd122 | 5739 | }; |
f3eb5384 | 5740 | |
1da177e4 LT |
5741 | /* |
5742 | * max_blocks is dependent on the amount of storage that is available | |
5743 | * in the static io buffer for each device. Currently each device has | |
5744 | * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has | |
5745 | * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use | |
5746 | * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In | |
5747 | * addition we have one define extent ccw + 16 bytes of data and one | |
5748 | * locate record ccw + 16 bytes of data. That makes: | |
5749 | * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. | |
5750 | * We want to fit two into the available memory so that we can immediately | |
5751 | * start the next request if one finishes off. That makes 249.5 blocks | |
5752 | * for one request. Give a little safety and the result is 240. | |
5753 | */ | |
5754 | static struct dasd_discipline dasd_eckd_discipline = { | |
5755 | .owner = THIS_MODULE, | |
5756 | .name = "ECKD", | |
5757 | .ebcname = "ECKD", | |
ef19298b | 5758 | .max_blocks = 190, |
1da177e4 | 5759 | .check_device = dasd_eckd_check_characteristics, |
8e09f215 | 5760 | .uncheck_device = dasd_eckd_uncheck_device, |
1da177e4 | 5761 | .do_analysis = dasd_eckd_do_analysis, |
a4d26c6a | 5762 | .verify_path = dasd_eckd_verify_path, |
d42e1712 | 5763 | .basic_to_ready = dasd_eckd_basic_to_ready, |
8e09f215 | 5764 | .online_to_ready = dasd_eckd_online_to_ready, |
daa991bf | 5765 | .basic_to_known = dasd_eckd_basic_to_known, |
1da177e4 LT |
5766 | .fill_geometry = dasd_eckd_fill_geometry, |
5767 | .start_IO = dasd_start_IO, | |
5768 | .term_IO = dasd_term_IO, | |
8e09f215 | 5769 | .handle_terminated_request = dasd_eckd_handle_terminated_request, |
1da177e4 | 5770 | .format_device = dasd_eckd_format_device, |
8fd57520 | 5771 | .check_device_format = dasd_eckd_check_device_format, |
1da177e4 LT |
5772 | .erp_action = dasd_eckd_erp_action, |
5773 | .erp_postaction = dasd_eckd_erp_postaction, | |
5a27e60d | 5774 | .check_for_device_change = dasd_eckd_check_for_device_change, |
8e09f215 SW |
5775 | .build_cp = dasd_eckd_build_alias_cp, |
5776 | .free_cp = dasd_eckd_free_alias_cp, | |
1da177e4 | 5777 | .dump_sense = dasd_eckd_dump_sense, |
fc19f381 | 5778 | .dump_sense_dbf = dasd_eckd_dump_sense_dbf, |
1da177e4 | 5779 | .fill_info = dasd_eckd_fill_info, |
1107ccfb | 5780 | .ioctl = dasd_eckd_ioctl, |
d41dd122 SH |
5781 | .freeze = dasd_eckd_pm_freeze, |
5782 | .restore = dasd_eckd_restore_device, | |
501183f2 | 5783 | .reload = dasd_eckd_reload_device, |
2dedf0d9 | 5784 | .get_uid = dasd_eckd_get_uid, |
f1633031 | 5785 | .kick_validate = dasd_eckd_kick_validate_server, |
5db8440c | 5786 | .check_attention = dasd_eckd_check_attention, |
5a3b7b11 SH |
5787 | .host_access_count = dasd_eckd_host_access_count, |
5788 | .hosts_print = dasd_hosts_print, | |
a521b048 SH |
5789 | .handle_hpf_error = dasd_eckd_handle_hpf_error, |
5790 | .disable_hpf = dasd_eckd_disable_hpf_device, | |
5791 | .hpf_enabled = dasd_eckd_hpf_enabled, | |
5792 | .reset_path = dasd_eckd_reset_path, | |
1da177e4 LT |
5793 | }; |
5794 | ||
5795 | static int __init | |
5796 | dasd_eckd_init(void) | |
5797 | { | |
736e6ea0 SO |
5798 | int ret; |
5799 | ||
1da177e4 | 5800 | ASCEBC(dasd_eckd_discipline.ebcname, 4); |
f932bcea SW |
5801 | dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), |
5802 | GFP_KERNEL | GFP_DMA); | |
5803 | if (!dasd_reserve_req) | |
5804 | return -ENOMEM; | |
a4d26c6a SW |
5805 | path_verification_worker = kmalloc(sizeof(*path_verification_worker), |
5806 | GFP_KERNEL | GFP_DMA); | |
5807 | if (!path_verification_worker) { | |
5808 | kfree(dasd_reserve_req); | |
5809 | return -ENOMEM; | |
5810 | } | |
558b9ef0 SW |
5811 | rawpadpage = (void *)__get_free_page(GFP_KERNEL); |
5812 | if (!rawpadpage) { | |
5813 | kfree(path_verification_worker); | |
5814 | kfree(dasd_reserve_req); | |
5815 | return -ENOMEM; | |
5816 | } | |
736e6ea0 SO |
5817 | ret = ccw_driver_register(&dasd_eckd_driver); |
5818 | if (!ret) | |
5819 | wait_for_device_probe(); | |
a4d26c6a SW |
5820 | else { |
5821 | kfree(path_verification_worker); | |
f932bcea | 5822 | kfree(dasd_reserve_req); |
558b9ef0 | 5823 | free_page((unsigned long)rawpadpage); |
a4d26c6a | 5824 | } |
736e6ea0 | 5825 | return ret; |
1da177e4 LT |
5826 | } |
5827 | ||
5828 | static void __exit | |
5829 | dasd_eckd_cleanup(void) | |
5830 | { | |
5831 | ccw_driver_unregister(&dasd_eckd_driver); | |
a4d26c6a | 5832 | kfree(path_verification_worker); |
f932bcea | 5833 | kfree(dasd_reserve_req); |
558b9ef0 | 5834 | free_page((unsigned long)rawpadpage); |
1da177e4 LT |
5835 | } |
5836 | ||
5837 | module_init(dasd_eckd_init); | |
5838 | module_exit(dasd_eckd_cleanup); |