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Commit | Line | Data |
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138c014d | 1 | /* |
1da177e4 | 2 | * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> |
138c014d | 3 | * Horst Hummel <Horst.Hummel@de.ibm.com> |
1da177e4 LT |
4 | * Carsten Otte <Cotte@de.ibm.com> |
5 | * Martin Schwidefsky <schwidefsky@de.ibm.com> | |
6 | * Bugreports.to..: <Linux390@de.ibm.com> | |
d41dd122 | 7 | * Copyright IBM Corp. 1999, 2009 |
ab1d848f NH |
8 | * EMC Symmetrix ioctl Copyright EMC Corporation, 2008 |
9 | * Author.........: Nigel Hislop <hislop_nigel@emc.com> | |
1da177e4 LT |
10 | */ |
11 | ||
ca99dab0 | 12 | #define KMSG_COMPONENT "dasd-eckd" |
fc19f381 | 13 | |
1da177e4 LT |
14 | #include <linux/stddef.h> |
15 | #include <linux/kernel.h> | |
16 | #include <linux/slab.h> | |
17 | #include <linux/hdreg.h> /* HDIO_GETGEO */ | |
18 | #include <linux/bio.h> | |
19 | #include <linux/module.h> | |
048cd4e5 | 20 | #include <linux/compat.h> |
1da177e4 | 21 | #include <linux/init.h> |
5a3b7b11 | 22 | #include <linux/seq_file.h> |
1da177e4 | 23 | |
382b7366 | 24 | #include <asm/css_chars.h> |
1da177e4 LT |
25 | #include <asm/debug.h> |
26 | #include <asm/idals.h> | |
27 | #include <asm/ebcdic.h> | |
28 | #include <asm/io.h> | |
7c0f6ba6 | 29 | #include <linux/uaccess.h> |
40545573 | 30 | #include <asm/cio.h> |
1da177e4 | 31 | #include <asm/ccwdev.h> |
f3eb5384 | 32 | #include <asm/itcw.h> |
5db8440c SH |
33 | #include <asm/schid.h> |
34 | #include <asm/chpid.h> | |
1da177e4 LT |
35 | |
36 | #include "dasd_int.h" | |
37 | #include "dasd_eckd.h" | |
38 | ||
39 | #ifdef PRINTK_HEADER | |
40 | #undef PRINTK_HEADER | |
41 | #endif /* PRINTK_HEADER */ | |
42 | #define PRINTK_HEADER "dasd(eckd):" | |
43 | ||
44 | #define ECKD_C0(i) (i->home_bytes) | |
45 | #define ECKD_F(i) (i->formula) | |
46 | #define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\ | |
47 | (i->factors.f_0x02.f1)) | |
48 | #define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\ | |
49 | (i->factors.f_0x02.f2)) | |
50 | #define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\ | |
51 | (i->factors.f_0x02.f3)) | |
52 | #define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0) | |
53 | #define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0) | |
54 | #define ECKD_F6(i) (i->factor6) | |
55 | #define ECKD_F7(i) (i->factor7) | |
56 | #define ECKD_F8(i) (i->factor8) | |
57 | ||
e4dbb0f2 SH |
58 | /* |
59 | * raw track access always map to 64k in memory | |
60 | * so it maps to 16 blocks of 4k per track | |
61 | */ | |
62 | #define DASD_RAW_BLOCK_PER_TRACK 16 | |
63 | #define DASD_RAW_BLOCKSIZE 4096 | |
64 | /* 64k are 128 x 512 byte sectors */ | |
65 | #define DASD_RAW_SECTORS_PER_TRACK 128 | |
66 | ||
1da177e4 LT |
67 | MODULE_LICENSE("GPL"); |
68 | ||
69 | static struct dasd_discipline dasd_eckd_discipline; | |
70 | ||
1da177e4 LT |
71 | /* The ccw bus type uses this table to find devices that it sends to |
72 | * dasd_eckd_probe */ | |
73 | static struct ccw_device_id dasd_eckd_ids[] = { | |
d2c993d8 HC |
74 | { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1}, |
75 | { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2}, | |
5da24b76 | 76 | { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info = 0x3}, |
d2c993d8 HC |
77 | { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4}, |
78 | { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5}, | |
79 | { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6}, | |
80 | { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7}, | |
81 | { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8}, | |
82 | { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9}, | |
83 | { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa}, | |
1da177e4 LT |
84 | { /* end of list */ }, |
85 | }; | |
86 | ||
87 | MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids); | |
88 | ||
89 | static struct ccw_driver dasd_eckd_driver; /* see below */ | |
90 | ||
558b9ef0 SW |
91 | static void *rawpadpage; |
92 | ||
eb6e199b SW |
93 | #define INIT_CQR_OK 0 |
94 | #define INIT_CQR_UNFORMATTED 1 | |
95 | #define INIT_CQR_ERROR 2 | |
96 | ||
f932bcea SW |
97 | /* emergency request for reserve/release */ |
98 | static struct { | |
99 | struct dasd_ccw_req cqr; | |
100 | struct ccw1 ccw; | |
101 | char data[32]; | |
102 | } *dasd_reserve_req; | |
103 | static DEFINE_MUTEX(dasd_reserve_mutex); | |
104 | ||
a4d26c6a SW |
105 | /* definitions for the path verification worker */ |
106 | struct path_verification_work_data { | |
107 | struct work_struct worker; | |
108 | struct dasd_device *device; | |
109 | struct dasd_ccw_req cqr; | |
110 | struct ccw1 ccw; | |
111 | __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE]; | |
112 | int isglobal; | |
113 | __u8 tbvpm; | |
114 | }; | |
115 | static struct path_verification_work_data *path_verification_worker; | |
116 | static DEFINE_MUTEX(dasd_path_verification_mutex); | |
eb6e199b | 117 | |
5db8440c SH |
118 | struct check_attention_work_data { |
119 | struct work_struct worker; | |
120 | struct dasd_device *device; | |
121 | __u8 lpum; | |
122 | }; | |
123 | ||
8fd57520 JH |
124 | static int prepare_itcw(struct itcw *, unsigned int, unsigned int, int, |
125 | struct dasd_device *, struct dasd_device *, | |
126 | unsigned int, int, unsigned int, unsigned int, | |
127 | unsigned int, unsigned int); | |
128 | ||
1da177e4 LT |
129 | /* initial attempt at a probe function. this can be simplified once |
130 | * the other detection code is gone */ | |
131 | static int | |
132 | dasd_eckd_probe (struct ccw_device *cdev) | |
133 | { | |
134 | int ret; | |
135 | ||
40545573 | 136 | /* set ECKD specific ccw-device options */ |
454e1fa1 PO |
137 | ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE | |
138 | CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH); | |
40545573 | 139 | if (ret) { |
b8ed5dd5 SH |
140 | DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", |
141 | "dasd_eckd_probe: could not set " | |
142 | "ccw-device options"); | |
1da177e4 | 143 | return ret; |
40545573 HH |
144 | } |
145 | ret = dasd_generic_probe(cdev, &dasd_eckd_discipline); | |
146 | return ret; | |
1da177e4 LT |
147 | } |
148 | ||
149 | static int | |
150 | dasd_eckd_set_online(struct ccw_device *cdev) | |
151 | { | |
40545573 | 152 | return dasd_generic_set_online(cdev, &dasd_eckd_discipline); |
1da177e4 LT |
153 | } |
154 | ||
1da177e4 LT |
155 | static const int sizes_trk0[] = { 28, 148, 84 }; |
156 | #define LABEL_SIZE 140 | |
157 | ||
3bc9fef9 SH |
158 | /* head and record addresses of count_area read in analysis ccw */ |
159 | static const int count_area_head[] = { 0, 0, 0, 0, 2 }; | |
160 | static const int count_area_rec[] = { 1, 2, 3, 4, 1 }; | |
161 | ||
1da177e4 LT |
162 | static inline unsigned int |
163 | round_up_multiple(unsigned int no, unsigned int mult) | |
164 | { | |
165 | int rem = no % mult; | |
166 | return (rem ? no - rem + mult : no); | |
167 | } | |
168 | ||
169 | static inline unsigned int | |
170 | ceil_quot(unsigned int d1, unsigned int d2) | |
171 | { | |
172 | return (d1 + (d2 - 1)) / d2; | |
173 | } | |
174 | ||
4d284cac | 175 | static unsigned int |
1da177e4 LT |
176 | recs_per_track(struct dasd_eckd_characteristics * rdc, |
177 | unsigned int kl, unsigned int dl) | |
178 | { | |
179 | int dn, kn; | |
180 | ||
181 | switch (rdc->dev_type) { | |
182 | case 0x3380: | |
183 | if (kl) | |
184 | return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + | |
185 | ceil_quot(dl + 12, 32)); | |
186 | else | |
187 | return 1499 / (15 + ceil_quot(dl + 12, 32)); | |
188 | case 0x3390: | |
189 | dn = ceil_quot(dl + 6, 232) + 1; | |
190 | if (kl) { | |
191 | kn = ceil_quot(kl + 6, 232) + 1; | |
192 | return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + | |
193 | 9 + ceil_quot(dl + 6 * dn, 34)); | |
194 | } else | |
195 | return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); | |
196 | case 0x9345: | |
197 | dn = ceil_quot(dl + 6, 232) + 1; | |
198 | if (kl) { | |
199 | kn = ceil_quot(kl + 6, 232) + 1; | |
200 | return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + | |
201 | ceil_quot(dl + 6 * dn, 34)); | |
202 | } else | |
203 | return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); | |
204 | } | |
205 | return 0; | |
206 | } | |
207 | ||
b44b0ab3 SW |
208 | static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) |
209 | { | |
210 | geo->cyl = (__u16) cyl; | |
211 | geo->head = cyl >> 16; | |
212 | geo->head <<= 4; | |
213 | geo->head |= head; | |
214 | } | |
215 | ||
45f186be JH |
216 | static int check_XRC(struct ccw1 *ccw, struct DE_eckd_data *data, |
217 | struct dasd_device *device) | |
1da177e4 | 218 | { |
543691a4 | 219 | struct dasd_eckd_private *private = device->private; |
d54853ef | 220 | int rc; |
1da177e4 | 221 | |
d54853ef MS |
222 | if (!private->rdc_data.facilities.XRC_supported) |
223 | return 0; | |
1da177e4 | 224 | |
45f186be | 225 | /* switch on System Time Stamp - needed for XRC Support */ |
d54853ef MS |
226 | data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ |
227 | data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ | |
1da177e4 | 228 | |
40277891 | 229 | rc = get_phys_clock(&data->ep_sys_time); |
d54853ef | 230 | /* Ignore return code if sync clock is switched off. */ |
a8f6db4d | 231 | if (rc == -EOPNOTSUPP || rc == -EACCES) |
d54853ef | 232 | rc = 0; |
1da177e4 | 233 | |
45f186be JH |
234 | if (ccw) { |
235 | ccw->count = sizeof(struct DE_eckd_data); | |
236 | ccw->flags |= CCW_FLAG_SLI; | |
237 | } | |
238 | ||
d54853ef MS |
239 | return rc; |
240 | } | |
1da177e4 | 241 | |
4d284cac | 242 | static int |
b44b0ab3 | 243 | define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, |
45f186be JH |
244 | unsigned int totrk, int cmd, struct dasd_device *device, |
245 | int blksize) | |
1da177e4 | 246 | { |
543691a4 | 247 | struct dasd_eckd_private *private = device->private; |
b44b0ab3 | 248 | u16 heads, beghead, endhead; |
45f186be | 249 | u32 begcyl, endcyl; |
d54853ef | 250 | int rc = 0; |
1da177e4 | 251 | |
45f186be JH |
252 | if (ccw) { |
253 | ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; | |
254 | ccw->flags = 0; | |
255 | ccw->count = 16; | |
256 | ccw->cda = (__u32)__pa(data); | |
257 | } | |
1da177e4 | 258 | |
8e09f215 | 259 | memset(data, 0, sizeof(struct DE_eckd_data)); |
1da177e4 LT |
260 | switch (cmd) { |
261 | case DASD_ECKD_CCW_READ_HOME_ADDRESS: | |
262 | case DASD_ECKD_CCW_READ_RECORD_ZERO: | |
263 | case DASD_ECKD_CCW_READ: | |
264 | case DASD_ECKD_CCW_READ_MT: | |
265 | case DASD_ECKD_CCW_READ_CKD: | |
266 | case DASD_ECKD_CCW_READ_CKD_MT: | |
267 | case DASD_ECKD_CCW_READ_KD: | |
268 | case DASD_ECKD_CCW_READ_KD_MT: | |
1da177e4 LT |
269 | data->mask.perm = 0x1; |
270 | data->attributes.operation = private->attrib.operation; | |
271 | break; | |
8fd57520 JH |
272 | case DASD_ECKD_CCW_READ_COUNT: |
273 | data->mask.perm = 0x1; | |
274 | data->attributes.operation = DASD_BYPASS_CACHE; | |
275 | break; | |
45f186be JH |
276 | case DASD_ECKD_CCW_READ_TRACK: |
277 | case DASD_ECKD_CCW_READ_TRACK_DATA: | |
278 | data->mask.perm = 0x1; | |
279 | data->attributes.operation = private->attrib.operation; | |
280 | data->blk_size = 0; | |
281 | break; | |
1da177e4 LT |
282 | case DASD_ECKD_CCW_WRITE: |
283 | case DASD_ECKD_CCW_WRITE_MT: | |
284 | case DASD_ECKD_CCW_WRITE_KD: | |
285 | case DASD_ECKD_CCW_WRITE_KD_MT: | |
286 | data->mask.perm = 0x02; | |
287 | data->attributes.operation = private->attrib.operation; | |
45f186be | 288 | rc = check_XRC(ccw, data, device); |
1da177e4 LT |
289 | break; |
290 | case DASD_ECKD_CCW_WRITE_CKD: | |
291 | case DASD_ECKD_CCW_WRITE_CKD_MT: | |
292 | data->attributes.operation = DASD_BYPASS_CACHE; | |
45f186be | 293 | rc = check_XRC(ccw, data, device); |
1da177e4 LT |
294 | break; |
295 | case DASD_ECKD_CCW_ERASE: | |
296 | case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: | |
297 | case DASD_ECKD_CCW_WRITE_RECORD_ZERO: | |
298 | data->mask.perm = 0x3; | |
299 | data->mask.auth = 0x1; | |
300 | data->attributes.operation = DASD_BYPASS_CACHE; | |
45f186be JH |
301 | rc = check_XRC(ccw, data, device); |
302 | break; | |
303 | case DASD_ECKD_CCW_WRITE_FULL_TRACK: | |
304 | data->mask.perm = 0x03; | |
305 | data->attributes.operation = private->attrib.operation; | |
306 | data->blk_size = 0; | |
307 | break; | |
308 | case DASD_ECKD_CCW_WRITE_TRACK_DATA: | |
309 | data->mask.perm = 0x02; | |
310 | data->attributes.operation = private->attrib.operation; | |
311 | data->blk_size = blksize; | |
312 | rc = check_XRC(ccw, data, device); | |
1da177e4 LT |
313 | break; |
314 | default: | |
fc19f381 SH |
315 | dev_err(&device->cdev->dev, |
316 | "0x%x is not a known command\n", cmd); | |
1da177e4 LT |
317 | break; |
318 | } | |
319 | ||
320 | data->attributes.mode = 0x3; /* ECKD */ | |
321 | ||
322 | if ((private->rdc_data.cu_type == 0x2105 || | |
323 | private->rdc_data.cu_type == 0x2107 || | |
324 | private->rdc_data.cu_type == 0x1750) | |
325 | && !(private->uses_cdl && trk < 2)) | |
326 | data->ga_extended |= 0x40; /* Regular Data Format Mode */ | |
327 | ||
b44b0ab3 SW |
328 | heads = private->rdc_data.trk_per_cyl; |
329 | begcyl = trk / heads; | |
330 | beghead = trk % heads; | |
331 | endcyl = totrk / heads; | |
332 | endhead = totrk % heads; | |
1da177e4 LT |
333 | |
334 | /* check for sequential prestage - enhance cylinder range */ | |
335 | if (data->attributes.operation == DASD_SEQ_PRESTAGE || | |
336 | data->attributes.operation == DASD_SEQ_ACCESS) { | |
138c014d | 337 | |
b44b0ab3 SW |
338 | if (endcyl + private->attrib.nr_cyl < private->real_cyl) |
339 | endcyl += private->attrib.nr_cyl; | |
1da177e4 | 340 | else |
b44b0ab3 | 341 | endcyl = (private->real_cyl - 1); |
1da177e4 LT |
342 | } |
343 | ||
b44b0ab3 SW |
344 | set_ch_t(&data->beg_ext, begcyl, beghead); |
345 | set_ch_t(&data->end_ext, endcyl, endhead); | |
d54853ef | 346 | return rc; |
1da177e4 LT |
347 | } |
348 | ||
8e09f215 | 349 | |
45f186be JH |
350 | static void locate_record_ext(struct ccw1 *ccw, struct LRE_eckd_data *data, |
351 | unsigned int trk, unsigned int rec_on_trk, | |
352 | int count, int cmd, struct dasd_device *device, | |
353 | unsigned int reclen, unsigned int tlf) | |
f3eb5384 | 354 | { |
543691a4 | 355 | struct dasd_eckd_private *private = device->private; |
f3eb5384 SW |
356 | int sector; |
357 | int dn, d; | |
358 | ||
45f186be JH |
359 | if (ccw) { |
360 | ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD_EXT; | |
361 | ccw->flags = 0; | |
362 | if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) | |
363 | ccw->count = 22; | |
364 | else | |
365 | ccw->count = 20; | |
366 | ccw->cda = (__u32)__pa(data); | |
367 | } | |
368 | ||
f3eb5384 SW |
369 | memset(data, 0, sizeof(*data)); |
370 | sector = 0; | |
371 | if (rec_on_trk) { | |
372 | switch (private->rdc_data.dev_type) { | |
373 | case 0x3390: | |
374 | dn = ceil_quot(reclen + 6, 232); | |
375 | d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); | |
376 | sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; | |
377 | break; | |
378 | case 0x3380: | |
379 | d = 7 + ceil_quot(reclen + 12, 32); | |
380 | sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; | |
381 | break; | |
382 | } | |
383 | } | |
384 | data->sector = sector; | |
385 | /* note: meaning of count depends on the operation | |
386 | * for record based I/O it's the number of records, but for | |
387 | * track based I/O it's the number of tracks | |
388 | */ | |
389 | data->count = count; | |
390 | switch (cmd) { | |
391 | case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: | |
392 | data->operation.orientation = 0x3; | |
393 | data->operation.operation = 0x03; | |
394 | break; | |
395 | case DASD_ECKD_CCW_READ_HOME_ADDRESS: | |
396 | data->operation.orientation = 0x3; | |
397 | data->operation.operation = 0x16; | |
398 | break; | |
399 | case DASD_ECKD_CCW_WRITE_RECORD_ZERO: | |
400 | data->operation.orientation = 0x1; | |
401 | data->operation.operation = 0x03; | |
402 | data->count++; | |
403 | break; | |
404 | case DASD_ECKD_CCW_READ_RECORD_ZERO: | |
405 | data->operation.orientation = 0x3; | |
406 | data->operation.operation = 0x16; | |
407 | data->count++; | |
408 | break; | |
409 | case DASD_ECKD_CCW_WRITE: | |
410 | case DASD_ECKD_CCW_WRITE_MT: | |
411 | case DASD_ECKD_CCW_WRITE_KD: | |
412 | case DASD_ECKD_CCW_WRITE_KD_MT: | |
413 | data->auxiliary.length_valid = 0x1; | |
414 | data->length = reclen; | |
415 | data->operation.operation = 0x01; | |
416 | break; | |
417 | case DASD_ECKD_CCW_WRITE_CKD: | |
418 | case DASD_ECKD_CCW_WRITE_CKD_MT: | |
419 | data->auxiliary.length_valid = 0x1; | |
420 | data->length = reclen; | |
421 | data->operation.operation = 0x03; | |
422 | break; | |
e4dbb0f2 SH |
423 | case DASD_ECKD_CCW_WRITE_FULL_TRACK: |
424 | data->operation.orientation = 0x0; | |
425 | data->operation.operation = 0x3F; | |
426 | data->extended_operation = 0x11; | |
427 | data->length = 0; | |
428 | data->extended_parameter_length = 0x02; | |
429 | if (data->count > 8) { | |
430 | data->extended_parameter[0] = 0xFF; | |
431 | data->extended_parameter[1] = 0xFF; | |
432 | data->extended_parameter[1] <<= (16 - count); | |
433 | } else { | |
434 | data->extended_parameter[0] = 0xFF; | |
435 | data->extended_parameter[0] <<= (8 - count); | |
436 | data->extended_parameter[1] = 0x00; | |
437 | } | |
438 | data->sector = 0xFF; | |
439 | break; | |
f3eb5384 SW |
440 | case DASD_ECKD_CCW_WRITE_TRACK_DATA: |
441 | data->auxiliary.length_valid = 0x1; | |
442 | data->length = reclen; /* not tlf, as one might think */ | |
443 | data->operation.operation = 0x3F; | |
444 | data->extended_operation = 0x23; | |
445 | break; | |
446 | case DASD_ECKD_CCW_READ: | |
447 | case DASD_ECKD_CCW_READ_MT: | |
448 | case DASD_ECKD_CCW_READ_KD: | |
449 | case DASD_ECKD_CCW_READ_KD_MT: | |
450 | data->auxiliary.length_valid = 0x1; | |
451 | data->length = reclen; | |
452 | data->operation.operation = 0x06; | |
453 | break; | |
454 | case DASD_ECKD_CCW_READ_CKD: | |
455 | case DASD_ECKD_CCW_READ_CKD_MT: | |
456 | data->auxiliary.length_valid = 0x1; | |
457 | data->length = reclen; | |
458 | data->operation.operation = 0x16; | |
459 | break; | |
460 | case DASD_ECKD_CCW_READ_COUNT: | |
461 | data->operation.operation = 0x06; | |
462 | break; | |
e4dbb0f2 SH |
463 | case DASD_ECKD_CCW_READ_TRACK: |
464 | data->operation.orientation = 0x1; | |
465 | data->operation.operation = 0x0C; | |
466 | data->extended_parameter_length = 0; | |
467 | data->sector = 0xFF; | |
468 | break; | |
f3eb5384 SW |
469 | case DASD_ECKD_CCW_READ_TRACK_DATA: |
470 | data->auxiliary.length_valid = 0x1; | |
471 | data->length = tlf; | |
472 | data->operation.operation = 0x0C; | |
473 | break; | |
474 | case DASD_ECKD_CCW_ERASE: | |
475 | data->length = reclen; | |
476 | data->auxiliary.length_valid = 0x1; | |
477 | data->operation.operation = 0x0b; | |
478 | break; | |
479 | default: | |
480 | DBF_DEV_EVENT(DBF_ERR, device, | |
481 | "fill LRE unknown opcode 0x%x", cmd); | |
482 | BUG(); | |
483 | } | |
484 | set_ch_t(&data->seek_addr, | |
485 | trk / private->rdc_data.trk_per_cyl, | |
486 | trk % private->rdc_data.trk_per_cyl); | |
487 | data->search_arg.cyl = data->seek_addr.cyl; | |
488 | data->search_arg.head = data->seek_addr.head; | |
489 | data->search_arg.record = rec_on_trk; | |
490 | } | |
491 | ||
492 | static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, | |
493 | unsigned int trk, unsigned int totrk, int cmd, | |
494 | struct dasd_device *basedev, struct dasd_device *startdev, | |
45f186be | 495 | unsigned int format, unsigned int rec_on_trk, int count, |
f3eb5384 | 496 | unsigned int blksize, unsigned int tlf) |
8e09f215 SW |
497 | { |
498 | struct dasd_eckd_private *basepriv, *startpriv; | |
f3eb5384 | 499 | struct LRE_eckd_data *lredata; |
45f186be | 500 | struct DE_eckd_data *dedata; |
8e09f215 SW |
501 | int rc = 0; |
502 | ||
543691a4 SO |
503 | basepriv = basedev->private; |
504 | startpriv = startdev->private; | |
f3eb5384 SW |
505 | dedata = &pfxdata->define_extent; |
506 | lredata = &pfxdata->locate_record; | |
8e09f215 SW |
507 | |
508 | ccw->cmd_code = DASD_ECKD_CCW_PFX; | |
509 | ccw->flags = 0; | |
e4dbb0f2 SH |
510 | if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) { |
511 | ccw->count = sizeof(*pfxdata) + 2; | |
512 | ccw->cda = (__u32) __pa(pfxdata); | |
513 | memset(pfxdata, 0, sizeof(*pfxdata) + 2); | |
514 | } else { | |
515 | ccw->count = sizeof(*pfxdata); | |
516 | ccw->cda = (__u32) __pa(pfxdata); | |
517 | memset(pfxdata, 0, sizeof(*pfxdata)); | |
518 | } | |
8e09f215 | 519 | |
8e09f215 | 520 | /* prefix data */ |
f3eb5384 SW |
521 | if (format > 1) { |
522 | DBF_DEV_EVENT(DBF_ERR, basedev, | |
523 | "PFX LRE unknown format 0x%x", format); | |
524 | BUG(); | |
525 | return -EINVAL; | |
526 | } | |
527 | pfxdata->format = format; | |
4abb08c2 SW |
528 | pfxdata->base_address = basepriv->ned->unit_addr; |
529 | pfxdata->base_lss = basepriv->ned->ID; | |
f3eb5384 | 530 | pfxdata->validity.define_extent = 1; |
8e09f215 SW |
531 | |
532 | /* private uid is kept up to date, conf_data may be outdated */ | |
533 | if (startpriv->uid.type != UA_BASE_DEVICE) { | |
534 | pfxdata->validity.verify_base = 1; | |
535 | if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) | |
536 | pfxdata->validity.hyper_pav = 1; | |
537 | } | |
538 | ||
45f186be | 539 | rc = define_extent(NULL, dedata, trk, totrk, cmd, basedev, blksize); |
8e09f215 | 540 | |
45f186be JH |
541 | /* |
542 | * For some commands the System Time Stamp is set in the define extent | |
543 | * data when XRC is supported. The validity of the time stamp must be | |
544 | * reflected in the prefix data as well. | |
545 | */ | |
546 | if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02) | |
547 | pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ | |
f3eb5384 SW |
548 | |
549 | if (format == 1) { | |
45f186be JH |
550 | locate_record_ext(NULL, lredata, trk, rec_on_trk, count, cmd, |
551 | basedev, blksize, tlf); | |
f3eb5384 SW |
552 | } |
553 | ||
8e09f215 SW |
554 | return rc; |
555 | } | |
556 | ||
f3eb5384 SW |
557 | static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, |
558 | unsigned int trk, unsigned int totrk, int cmd, | |
559 | struct dasd_device *basedev, struct dasd_device *startdev) | |
560 | { | |
561 | return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev, | |
562 | 0, 0, 0, 0, 0); | |
563 | } | |
564 | ||
4d284cac | 565 | static void |
b44b0ab3 SW |
566 | locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, |
567 | unsigned int rec_on_trk, int no_rec, int cmd, | |
1da177e4 LT |
568 | struct dasd_device * device, int reclen) |
569 | { | |
543691a4 | 570 | struct dasd_eckd_private *private = device->private; |
1da177e4 LT |
571 | int sector; |
572 | int dn, d; | |
138c014d | 573 | |
1da177e4 LT |
574 | DBF_DEV_EVENT(DBF_INFO, device, |
575 | "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", | |
576 | trk, rec_on_trk, no_rec, cmd, reclen); | |
577 | ||
578 | ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; | |
579 | ccw->flags = 0; | |
580 | ccw->count = 16; | |
581 | ccw->cda = (__u32) __pa(data); | |
582 | ||
8e09f215 | 583 | memset(data, 0, sizeof(struct LO_eckd_data)); |
1da177e4 LT |
584 | sector = 0; |
585 | if (rec_on_trk) { | |
586 | switch (private->rdc_data.dev_type) { | |
587 | case 0x3390: | |
588 | dn = ceil_quot(reclen + 6, 232); | |
589 | d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); | |
590 | sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; | |
591 | break; | |
592 | case 0x3380: | |
593 | d = 7 + ceil_quot(reclen + 12, 32); | |
594 | sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; | |
595 | break; | |
596 | } | |
597 | } | |
598 | data->sector = sector; | |
599 | data->count = no_rec; | |
600 | switch (cmd) { | |
601 | case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: | |
602 | data->operation.orientation = 0x3; | |
603 | data->operation.operation = 0x03; | |
604 | break; | |
605 | case DASD_ECKD_CCW_READ_HOME_ADDRESS: | |
606 | data->operation.orientation = 0x3; | |
607 | data->operation.operation = 0x16; | |
608 | break; | |
609 | case DASD_ECKD_CCW_WRITE_RECORD_ZERO: | |
610 | data->operation.orientation = 0x1; | |
611 | data->operation.operation = 0x03; | |
612 | data->count++; | |
613 | break; | |
614 | case DASD_ECKD_CCW_READ_RECORD_ZERO: | |
615 | data->operation.orientation = 0x3; | |
616 | data->operation.operation = 0x16; | |
617 | data->count++; | |
618 | break; | |
619 | case DASD_ECKD_CCW_WRITE: | |
620 | case DASD_ECKD_CCW_WRITE_MT: | |
621 | case DASD_ECKD_CCW_WRITE_KD: | |
622 | case DASD_ECKD_CCW_WRITE_KD_MT: | |
623 | data->auxiliary.last_bytes_used = 0x1; | |
624 | data->length = reclen; | |
625 | data->operation.operation = 0x01; | |
626 | break; | |
627 | case DASD_ECKD_CCW_WRITE_CKD: | |
628 | case DASD_ECKD_CCW_WRITE_CKD_MT: | |
629 | data->auxiliary.last_bytes_used = 0x1; | |
630 | data->length = reclen; | |
631 | data->operation.operation = 0x03; | |
632 | break; | |
633 | case DASD_ECKD_CCW_READ: | |
634 | case DASD_ECKD_CCW_READ_MT: | |
635 | case DASD_ECKD_CCW_READ_KD: | |
636 | case DASD_ECKD_CCW_READ_KD_MT: | |
637 | data->auxiliary.last_bytes_used = 0x1; | |
638 | data->length = reclen; | |
639 | data->operation.operation = 0x06; | |
640 | break; | |
641 | case DASD_ECKD_CCW_READ_CKD: | |
642 | case DASD_ECKD_CCW_READ_CKD_MT: | |
643 | data->auxiliary.last_bytes_used = 0x1; | |
644 | data->length = reclen; | |
645 | data->operation.operation = 0x16; | |
646 | break; | |
647 | case DASD_ECKD_CCW_READ_COUNT: | |
648 | data->operation.operation = 0x06; | |
649 | break; | |
650 | case DASD_ECKD_CCW_ERASE: | |
651 | data->length = reclen; | |
652 | data->auxiliary.last_bytes_used = 0x1; | |
653 | data->operation.operation = 0x0b; | |
654 | break; | |
655 | default: | |
fc19f381 SH |
656 | DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record " |
657 | "opcode 0x%x", cmd); | |
1da177e4 | 658 | } |
b44b0ab3 SW |
659 | set_ch_t(&data->seek_addr, |
660 | trk / private->rdc_data.trk_per_cyl, | |
661 | trk % private->rdc_data.trk_per_cyl); | |
662 | data->search_arg.cyl = data->seek_addr.cyl; | |
663 | data->search_arg.head = data->seek_addr.head; | |
1da177e4 LT |
664 | data->search_arg.record = rec_on_trk; |
665 | } | |
666 | ||
667 | /* | |
668 | * Returns 1 if the block is one of the special blocks that needs | |
669 | * to get read/written with the KD variant of the command. | |
670 | * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and | |
671 | * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. | |
672 | * Luckily the KD variants differ only by one bit (0x08) from the | |
673 | * normal variant. So don't wonder about code like: | |
674 | * if (dasd_eckd_cdl_special(blk_per_trk, recid)) | |
675 | * ccw->cmd_code |= 0x8; | |
676 | */ | |
677 | static inline int | |
678 | dasd_eckd_cdl_special(int blk_per_trk, int recid) | |
679 | { | |
680 | if (recid < 3) | |
681 | return 1; | |
682 | if (recid < blk_per_trk) | |
683 | return 0; | |
684 | if (recid < 2 * blk_per_trk) | |
685 | return 1; | |
686 | return 0; | |
687 | } | |
688 | ||
689 | /* | |
690 | * Returns the record size for the special blocks of the cdl format. | |
691 | * Only returns something useful if dasd_eckd_cdl_special is true | |
692 | * for the recid. | |
693 | */ | |
694 | static inline int | |
695 | dasd_eckd_cdl_reclen(int recid) | |
696 | { | |
697 | if (recid < 3) | |
698 | return sizes_trk0[recid]; | |
699 | return LABEL_SIZE; | |
700 | } | |
b206181d SH |
701 | /* create unique id from private structure. */ |
702 | static void create_uid(struct dasd_eckd_private *private) | |
3d052595 | 703 | { |
4abb08c2 | 704 | int count; |
b206181d | 705 | struct dasd_uid *uid; |
3d052595 | 706 | |
2dedf0d9 | 707 | uid = &private->uid; |
3d052595 | 708 | memset(uid, 0, sizeof(struct dasd_uid)); |
4abb08c2 | 709 | memcpy(uid->vendor, private->ned->HDA_manufacturer, |
d0710c7c | 710 | sizeof(uid->vendor) - 1); |
3d052595 | 711 | EBCASC(uid->vendor, sizeof(uid->vendor) - 1); |
4abb08c2 | 712 | memcpy(uid->serial, private->ned->HDA_location, |
d0710c7c | 713 | sizeof(uid->serial) - 1); |
3d052595 | 714 | EBCASC(uid->serial, sizeof(uid->serial) - 1); |
4abb08c2 | 715 | uid->ssid = private->gneq->subsystemID; |
a419aef8 | 716 | uid->real_unit_addr = private->ned->unit_addr; |
4abb08c2 SW |
717 | if (private->sneq) { |
718 | uid->type = private->sneq->sua_flags; | |
8e09f215 | 719 | if (uid->type == UA_BASE_PAV_ALIAS) |
4abb08c2 | 720 | uid->base_unit_addr = private->sneq->base_unit_addr; |
8e09f215 SW |
721 | } else { |
722 | uid->type = UA_BASE_DEVICE; | |
723 | } | |
4abb08c2 SW |
724 | if (private->vdsneq) { |
725 | for (count = 0; count < 16; count++) { | |
726 | sprintf(uid->vduit+2*count, "%02x", | |
727 | private->vdsneq->uit[count]); | |
728 | } | |
729 | } | |
b206181d SH |
730 | } |
731 | ||
732 | /* | |
733 | * Generate device unique id that specifies the physical device. | |
734 | */ | |
735 | static int dasd_eckd_generate_uid(struct dasd_device *device) | |
736 | { | |
543691a4 | 737 | struct dasd_eckd_private *private = device->private; |
b206181d SH |
738 | unsigned long flags; |
739 | ||
b206181d SH |
740 | if (!private) |
741 | return -ENODEV; | |
742 | if (!private->ned || !private->gneq) | |
743 | return -ENODEV; | |
744 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); | |
745 | create_uid(private); | |
2dedf0d9 | 746 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
3d052595 HH |
747 | return 0; |
748 | } | |
749 | ||
2dedf0d9 SH |
750 | static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid) |
751 | { | |
543691a4 | 752 | struct dasd_eckd_private *private = device->private; |
2dedf0d9 SH |
753 | unsigned long flags; |
754 | ||
543691a4 | 755 | if (private) { |
2dedf0d9 SH |
756 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); |
757 | *uid = private->uid; | |
758 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); | |
759 | return 0; | |
760 | } | |
761 | return -EINVAL; | |
762 | } | |
763 | ||
b206181d SH |
764 | /* |
765 | * compare device UID with data of a given dasd_eckd_private structure | |
766 | * return 0 for match | |
767 | */ | |
768 | static int dasd_eckd_compare_path_uid(struct dasd_device *device, | |
769 | struct dasd_eckd_private *private) | |
770 | { | |
771 | struct dasd_uid device_uid; | |
772 | ||
773 | create_uid(private); | |
774 | dasd_eckd_get_uid(device, &device_uid); | |
775 | ||
776 | return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid)); | |
777 | } | |
778 | ||
a4d26c6a SW |
779 | static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device, |
780 | struct dasd_ccw_req *cqr, | |
781 | __u8 *rcd_buffer, | |
782 | __u8 lpm) | |
17283b56 | 783 | { |
17283b56 | 784 | struct ccw1 *ccw; |
a4d26c6a SW |
785 | /* |
786 | * buffer has to start with EBCDIC "V1.0" to show | |
787 | * support for virtual device SNEQ | |
788 | */ | |
789 | rcd_buffer[0] = 0xE5; | |
790 | rcd_buffer[1] = 0xF1; | |
791 | rcd_buffer[2] = 0x4B; | |
792 | rcd_buffer[3] = 0xF0; | |
17283b56 CH |
793 | |
794 | ccw = cqr->cpaddr; | |
a4d26c6a SW |
795 | ccw->cmd_code = DASD_ECKD_CCW_RCD; |
796 | ccw->flags = 0; | |
17283b56 | 797 | ccw->cda = (__u32)(addr_t)rcd_buffer; |
a4d26c6a SW |
798 | ccw->count = DASD_ECKD_RCD_DATA_SIZE; |
799 | cqr->magic = DASD_ECKD_MAGIC; | |
17283b56 | 800 | |
8e09f215 SW |
801 | cqr->startdev = device; |
802 | cqr->memdev = device; | |
803 | cqr->block = NULL; | |
17283b56 CH |
804 | cqr->expires = 10*HZ; |
805 | cqr->lpm = lpm; | |
eb6e199b | 806 | cqr->retries = 256; |
1aae0560 | 807 | cqr->buildclk = get_tod_clock(); |
17283b56 | 808 | cqr->status = DASD_CQR_FILLED; |
a4d26c6a SW |
809 | set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); |
810 | } | |
811 | ||
5915a873 SH |
812 | /* |
813 | * Wakeup helper for read_conf | |
814 | * if the cqr is not done and needs some error recovery | |
815 | * the buffer has to be re-initialized with the EBCDIC "V1.0" | |
816 | * to show support for virtual device SNEQ | |
817 | */ | |
818 | static void read_conf_cb(struct dasd_ccw_req *cqr, void *data) | |
819 | { | |
820 | struct ccw1 *ccw; | |
821 | __u8 *rcd_buffer; | |
822 | ||
823 | if (cqr->status != DASD_CQR_DONE) { | |
824 | ccw = cqr->cpaddr; | |
825 | rcd_buffer = (__u8 *)((addr_t) ccw->cda); | |
826 | memset(rcd_buffer, 0, sizeof(*rcd_buffer)); | |
827 | ||
828 | rcd_buffer[0] = 0xE5; | |
829 | rcd_buffer[1] = 0xF1; | |
830 | rcd_buffer[2] = 0x4B; | |
831 | rcd_buffer[3] = 0xF0; | |
832 | } | |
833 | dasd_wakeup_cb(cqr, data); | |
834 | } | |
835 | ||
a4d26c6a SW |
836 | static int dasd_eckd_read_conf_immediately(struct dasd_device *device, |
837 | struct dasd_ccw_req *cqr, | |
838 | __u8 *rcd_buffer, | |
839 | __u8 lpm) | |
840 | { | |
841 | struct ciw *ciw; | |
842 | int rc; | |
843 | /* | |
844 | * sanity check: scan for RCD command in extended SenseID data | |
845 | * some devices do not support RCD | |
846 | */ | |
847 | ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); | |
848 | if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) | |
849 | return -EOPNOTSUPP; | |
850 | ||
851 | dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm); | |
852 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); | |
5a27e60d | 853 | set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); |
a4d26c6a | 854 | cqr->retries = 5; |
5915a873 | 855 | cqr->callback = read_conf_cb; |
a4d26c6a SW |
856 | rc = dasd_sleep_on_immediatly(cqr); |
857 | return rc; | |
17283b56 CH |
858 | } |
859 | ||
860 | static int dasd_eckd_read_conf_lpm(struct dasd_device *device, | |
861 | void **rcd_buffer, | |
862 | int *rcd_buffer_size, __u8 lpm) | |
863 | { | |
864 | struct ciw *ciw; | |
865 | char *rcd_buf = NULL; | |
866 | int ret; | |
867 | struct dasd_ccw_req *cqr; | |
868 | ||
869 | /* | |
a4d26c6a SW |
870 | * sanity check: scan for RCD command in extended SenseID data |
871 | * some devices do not support RCD | |
17283b56 CH |
872 | */ |
873 | ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); | |
a4d26c6a | 874 | if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) { |
17283b56 CH |
875 | ret = -EOPNOTSUPP; |
876 | goto out_error; | |
877 | } | |
a4d26c6a | 878 | rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA); |
17283b56 CH |
879 | if (!rcd_buf) { |
880 | ret = -ENOMEM; | |
881 | goto out_error; | |
882 | } | |
a4d26c6a SW |
883 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, |
884 | 0, /* use rcd_buf as data ara */ | |
885 | device); | |
17283b56 | 886 | if (IS_ERR(cqr)) { |
a4d26c6a SW |
887 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
888 | "Could not allocate RCD request"); | |
889 | ret = -ENOMEM; | |
17283b56 CH |
890 | goto out_error; |
891 | } | |
a4d26c6a | 892 | dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm); |
5915a873 | 893 | cqr->callback = read_conf_cb; |
17283b56 CH |
894 | ret = dasd_sleep_on(cqr); |
895 | /* | |
896 | * on success we update the user input parms | |
897 | */ | |
8e09f215 | 898 | dasd_sfree_request(cqr, cqr->memdev); |
17283b56 CH |
899 | if (ret) |
900 | goto out_error; | |
901 | ||
a4d26c6a | 902 | *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE; |
17283b56 CH |
903 | *rcd_buffer = rcd_buf; |
904 | return 0; | |
905 | out_error: | |
906 | kfree(rcd_buf); | |
907 | *rcd_buffer = NULL; | |
908 | *rcd_buffer_size = 0; | |
909 | return ret; | |
910 | } | |
911 | ||
4abb08c2 SW |
912 | static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) |
913 | { | |
914 | ||
915 | struct dasd_sneq *sneq; | |
916 | int i, count; | |
917 | ||
918 | private->ned = NULL; | |
919 | private->sneq = NULL; | |
920 | private->vdsneq = NULL; | |
921 | private->gneq = NULL; | |
922 | count = private->conf_len / sizeof(struct dasd_sneq); | |
923 | sneq = (struct dasd_sneq *)private->conf_data; | |
924 | for (i = 0; i < count; ++i) { | |
925 | if (sneq->flags.identifier == 1 && sneq->format == 1) | |
926 | private->sneq = sneq; | |
927 | else if (sneq->flags.identifier == 1 && sneq->format == 4) | |
928 | private->vdsneq = (struct vd_sneq *)sneq; | |
929 | else if (sneq->flags.identifier == 2) | |
930 | private->gneq = (struct dasd_gneq *)sneq; | |
931 | else if (sneq->flags.identifier == 3 && sneq->res1 == 1) | |
932 | private->ned = (struct dasd_ned *)sneq; | |
933 | sneq++; | |
934 | } | |
935 | if (!private->ned || !private->gneq) { | |
936 | private->ned = NULL; | |
937 | private->sneq = NULL; | |
938 | private->vdsneq = NULL; | |
939 | private->gneq = NULL; | |
940 | return -EINVAL; | |
941 | } | |
942 | return 0; | |
943 | ||
944 | }; | |
945 | ||
946 | static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) | |
947 | { | |
948 | struct dasd_gneq *gneq; | |
949 | int i, count, found; | |
950 | ||
951 | count = conf_len / sizeof(*gneq); | |
952 | gneq = (struct dasd_gneq *)conf_data; | |
953 | found = 0; | |
954 | for (i = 0; i < count; ++i) { | |
955 | if (gneq->flags.identifier == 2) { | |
956 | found = 1; | |
957 | break; | |
958 | } | |
959 | gneq++; | |
960 | } | |
961 | if (found) | |
962 | return ((char *)gneq)[18] & 0x07; | |
963 | else | |
964 | return 0; | |
965 | } | |
966 | ||
c7c0c9de SH |
967 | static void dasd_eckd_clear_conf_data(struct dasd_device *device) |
968 | { | |
543691a4 | 969 | struct dasd_eckd_private *private = device->private; |
c7c0c9de SH |
970 | int i; |
971 | ||
c7c0c9de SH |
972 | private->conf_data = NULL; |
973 | private->conf_len = 0; | |
974 | for (i = 0; i < 8; i++) { | |
c9346151 SH |
975 | kfree(device->path[i].conf_data); |
976 | device->path[i].conf_data = NULL; | |
a521b048 SH |
977 | device->path[i].cssid = 0; |
978 | device->path[i].ssid = 0; | |
979 | device->path[i].chpid = 0; | |
c7c0c9de SH |
980 | } |
981 | } | |
982 | ||
983 | ||
4abb08c2 | 984 | static int dasd_eckd_read_conf(struct dasd_device *device) |
1da177e4 LT |
985 | { |
986 | void *conf_data; | |
987 | int conf_len, conf_data_saved; | |
b179b037 | 988 | int rc, path_err, pos; |
a4d26c6a | 989 | __u8 lpm, opm; |
b206181d | 990 | struct dasd_eckd_private *private, path_private; |
b206181d SH |
991 | struct dasd_uid *uid; |
992 | char print_path_uid[60], print_device_uid[60]; | |
a521b048 SH |
993 | struct channel_path_desc *chp_desc; |
994 | struct subchannel_id sch_id; | |
1da177e4 | 995 | |
543691a4 | 996 | private = device->private; |
a4d26c6a | 997 | opm = ccw_device_get_path_mask(device->cdev); |
a521b048 | 998 | ccw_device_get_schid(device->cdev, &sch_id); |
1da177e4 | 999 | conf_data_saved = 0; |
55d3a85c | 1000 | path_err = 0; |
1da177e4 LT |
1001 | /* get configuration data per operational path */ |
1002 | for (lpm = 0x80; lpm; lpm>>= 1) { | |
b206181d SH |
1003 | if (!(lpm & opm)) |
1004 | continue; | |
1005 | rc = dasd_eckd_read_conf_lpm(device, &conf_data, | |
1006 | &conf_len, lpm); | |
1007 | if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ | |
1008 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, | |
1009 | "Read configuration data returned " | |
1010 | "error %d", rc); | |
1011 | return rc; | |
1012 | } | |
1013 | if (conf_data == NULL) { | |
1014 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
1015 | "No configuration data " | |
1016 | "retrieved"); | |
1017 | /* no further analysis possible */ | |
c9346151 | 1018 | dasd_path_add_opm(device, opm); |
b206181d SH |
1019 | continue; /* no error */ |
1020 | } | |
1021 | /* save first valid configuration data */ | |
1022 | if (!conf_data_saved) { | |
c7c0c9de SH |
1023 | /* initially clear previously stored conf_data */ |
1024 | dasd_eckd_clear_conf_data(device); | |
b206181d SH |
1025 | private->conf_data = conf_data; |
1026 | private->conf_len = conf_len; | |
1027 | if (dasd_eckd_identify_conf_parts(private)) { | |
1028 | private->conf_data = NULL; | |
1029 | private->conf_len = 0; | |
1030 | kfree(conf_data); | |
1031 | continue; | |
1da177e4 | 1032 | } |
c7c0c9de SH |
1033 | pos = pathmask_to_pos(lpm); |
1034 | /* store per path conf_data */ | |
c9346151 | 1035 | device->path[pos].conf_data = conf_data; |
a521b048 SH |
1036 | device->path[pos].cssid = sch_id.cssid; |
1037 | device->path[pos].ssid = sch_id.ssid; | |
1038 | chp_desc = ccw_device_get_chp_desc(device->cdev, pos); | |
1039 | if (chp_desc) | |
1040 | device->path[pos].chpid = chp_desc->chpid; | |
1041 | kfree(chp_desc); | |
b206181d SH |
1042 | /* |
1043 | * build device UID that other path data | |
1044 | * can be compared to it | |
1045 | */ | |
1046 | dasd_eckd_generate_uid(device); | |
1047 | conf_data_saved++; | |
1048 | } else { | |
1049 | path_private.conf_data = conf_data; | |
1050 | path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; | |
1051 | if (dasd_eckd_identify_conf_parts( | |
1052 | &path_private)) { | |
1053 | path_private.conf_data = NULL; | |
1054 | path_private.conf_len = 0; | |
1055 | kfree(conf_data); | |
1056 | continue; | |
1da177e4 | 1057 | } |
b206181d SH |
1058 | if (dasd_eckd_compare_path_uid( |
1059 | device, &path_private)) { | |
1060 | uid = &path_private.uid; | |
1061 | if (strlen(uid->vduit) > 0) | |
1062 | snprintf(print_path_uid, | |
1063 | sizeof(print_path_uid), | |
1064 | "%s.%s.%04x.%02x.%s", | |
1065 | uid->vendor, uid->serial, | |
1066 | uid->ssid, uid->real_unit_addr, | |
1067 | uid->vduit); | |
1068 | else | |
1069 | snprintf(print_path_uid, | |
1070 | sizeof(print_path_uid), | |
1071 | "%s.%s.%04x.%02x", | |
1072 | uid->vendor, uid->serial, | |
1073 | uid->ssid, | |
1074 | uid->real_unit_addr); | |
1075 | uid = &private->uid; | |
1076 | if (strlen(uid->vduit) > 0) | |
1077 | snprintf(print_device_uid, | |
1078 | sizeof(print_device_uid), | |
1079 | "%s.%s.%04x.%02x.%s", | |
1080 | uid->vendor, uid->serial, | |
1081 | uid->ssid, uid->real_unit_addr, | |
1082 | uid->vduit); | |
1083 | else | |
1084 | snprintf(print_device_uid, | |
1085 | sizeof(print_device_uid), | |
1086 | "%s.%s.%04x.%02x", | |
1087 | uid->vendor, uid->serial, | |
1088 | uid->ssid, | |
1089 | uid->real_unit_addr); | |
1090 | dev_err(&device->cdev->dev, | |
1091 | "Not all channel paths lead to " | |
1092 | "the same device, path %02X leads to " | |
1093 | "device %s instead of %s\n", lpm, | |
1094 | print_path_uid, print_device_uid); | |
55d3a85c | 1095 | path_err = -EINVAL; |
c9346151 | 1096 | dasd_path_add_cablepm(device, lpm); |
55d3a85c | 1097 | continue; |
1da177e4 | 1098 | } |
c7c0c9de SH |
1099 | pos = pathmask_to_pos(lpm); |
1100 | /* store per path conf_data */ | |
c9346151 | 1101 | device->path[pos].conf_data = conf_data; |
a521b048 SH |
1102 | device->path[pos].cssid = sch_id.cssid; |
1103 | device->path[pos].ssid = sch_id.ssid; | |
1104 | chp_desc = ccw_device_get_chp_desc(device->cdev, pos); | |
1105 | if (chp_desc) | |
1106 | device->path[pos].chpid = chp_desc->chpid; | |
1107 | kfree(chp_desc); | |
b206181d SH |
1108 | path_private.conf_data = NULL; |
1109 | path_private.conf_len = 0; | |
1110 | } | |
1111 | switch (dasd_eckd_path_access(conf_data, conf_len)) { | |
1112 | case 0x02: | |
c9346151 | 1113 | dasd_path_add_nppm(device, lpm); |
b206181d SH |
1114 | break; |
1115 | case 0x03: | |
c9346151 | 1116 | dasd_path_add_ppm(device, lpm); |
b206181d | 1117 | break; |
1da177e4 | 1118 | } |
c9346151 SH |
1119 | if (!dasd_path_get_opm(device)) { |
1120 | dasd_path_set_opm(device, lpm); | |
ccc0e7dc SH |
1121 | dasd_generic_path_operational(device); |
1122 | } else { | |
c9346151 | 1123 | dasd_path_add_opm(device, lpm); |
ccc0e7dc | 1124 | } |
1da177e4 | 1125 | } |
b206181d | 1126 | |
55d3a85c | 1127 | return path_err; |
1da177e4 LT |
1128 | } |
1129 | ||
a521b048 SH |
1130 | static u32 get_fcx_max_data(struct dasd_device *device) |
1131 | { | |
1132 | struct dasd_eckd_private *private = device->private; | |
1133 | int fcx_in_css, fcx_in_gneq, fcx_in_features; | |
1134 | int tpm, mdc; | |
1135 | ||
1136 | if (dasd_nofcx) | |
1137 | return 0; | |
1138 | /* is transport mode supported? */ | |
1139 | fcx_in_css = css_general_characteristics.fcx; | |
1140 | fcx_in_gneq = private->gneq->reserved2[7] & 0x04; | |
1141 | fcx_in_features = private->features.feature[40] & 0x80; | |
1142 | tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; | |
1143 | ||
1144 | if (!tpm) | |
1145 | return 0; | |
1146 | ||
1147 | mdc = ccw_device_get_mdc(device->cdev, 0); | |
1148 | if (mdc < 0) { | |
1149 | dev_warn(&device->cdev->dev, "Detecting the maximum supported data size for zHPF requests failed\n"); | |
1150 | return 0; | |
1151 | } else { | |
1152 | return (u32)mdc * FCX_MAX_DATA_FACTOR; | |
1153 | } | |
1154 | } | |
1155 | ||
a4d26c6a SW |
1156 | static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) |
1157 | { | |
543691a4 | 1158 | struct dasd_eckd_private *private = device->private; |
a4d26c6a SW |
1159 | int mdc; |
1160 | u32 fcx_max_data; | |
1161 | ||
a4d26c6a SW |
1162 | if (private->fcx_max_data) { |
1163 | mdc = ccw_device_get_mdc(device->cdev, lpm); | |
1164 | if ((mdc < 0)) { | |
1165 | dev_warn(&device->cdev->dev, | |
1166 | "Detecting the maximum data size for zHPF " | |
1167 | "requests failed (rc=%d) for a new path %x\n", | |
1168 | mdc, lpm); | |
1169 | return mdc; | |
1170 | } | |
0f02c4e7 | 1171 | fcx_max_data = (u32)mdc * FCX_MAX_DATA_FACTOR; |
a4d26c6a SW |
1172 | if (fcx_max_data < private->fcx_max_data) { |
1173 | dev_warn(&device->cdev->dev, | |
1174 | "The maximum data size for zHPF requests %u " | |
1175 | "on a new path %x is below the active maximum " | |
1176 | "%u\n", fcx_max_data, lpm, | |
1177 | private->fcx_max_data); | |
1178 | return -EACCES; | |
1179 | } | |
1180 | } | |
1181 | return 0; | |
1182 | } | |
1183 | ||
b206181d SH |
1184 | static int rebuild_device_uid(struct dasd_device *device, |
1185 | struct path_verification_work_data *data) | |
1186 | { | |
543691a4 | 1187 | struct dasd_eckd_private *private = device->private; |
c9346151 | 1188 | __u8 lpm, opm = dasd_path_get_opm(device); |
543691a4 | 1189 | int rc = -ENODEV; |
b206181d SH |
1190 | |
1191 | for (lpm = 0x80; lpm; lpm >>= 1) { | |
1192 | if (!(lpm & opm)) | |
1193 | continue; | |
1194 | memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); | |
1195 | memset(&data->cqr, 0, sizeof(data->cqr)); | |
1196 | data->cqr.cpaddr = &data->ccw; | |
1197 | rc = dasd_eckd_read_conf_immediately(device, &data->cqr, | |
1198 | data->rcd_buffer, | |
1199 | lpm); | |
1200 | ||
1201 | if (rc) { | |
1202 | if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */ | |
1203 | continue; | |
1204 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, | |
1205 | "Read configuration data " | |
1206 | "returned error %d", rc); | |
1207 | break; | |
1208 | } | |
1209 | memcpy(private->conf_data, data->rcd_buffer, | |
1210 | DASD_ECKD_RCD_DATA_SIZE); | |
1211 | if (dasd_eckd_identify_conf_parts(private)) { | |
1212 | rc = -ENODEV; | |
1213 | } else /* first valid path is enough */ | |
1214 | break; | |
1215 | } | |
1216 | ||
1217 | if (!rc) | |
1218 | rc = dasd_eckd_generate_uid(device); | |
1219 | ||
1220 | return rc; | |
1221 | } | |
1222 | ||
a4d26c6a SW |
1223 | static void do_path_verification_work(struct work_struct *work) |
1224 | { | |
1225 | struct path_verification_work_data *data; | |
1226 | struct dasd_device *device; | |
b206181d SH |
1227 | struct dasd_eckd_private path_private; |
1228 | struct dasd_uid *uid; | |
1229 | __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; | |
5db8440c | 1230 | __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm; |
a4d26c6a | 1231 | unsigned long flags; |
b206181d | 1232 | char print_uid[60]; |
a4d26c6a SW |
1233 | int rc; |
1234 | ||
1235 | data = container_of(work, struct path_verification_work_data, worker); | |
1236 | device = data->device; | |
1237 | ||
c8d1c0ff SH |
1238 | /* delay path verification until device was resumed */ |
1239 | if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { | |
1240 | schedule_work(work); | |
1241 | return; | |
1242 | } | |
1eb38023 SH |
1243 | /* check if path verification already running and delay if so */ |
1244 | if (test_and_set_bit(DASD_FLAG_PATH_VERIFY, &device->flags)) { | |
1245 | schedule_work(work); | |
1246 | return; | |
1247 | } | |
a4d26c6a SW |
1248 | opm = 0; |
1249 | npm = 0; | |
1250 | ppm = 0; | |
1251 | epm = 0; | |
5db8440c SH |
1252 | hpfpm = 0; |
1253 | cablepm = 0; | |
1254 | ||
a4d26c6a | 1255 | for (lpm = 0x80; lpm; lpm >>= 1) { |
b206181d SH |
1256 | if (!(lpm & data->tbvpm)) |
1257 | continue; | |
1258 | memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); | |
1259 | memset(&data->cqr, 0, sizeof(data->cqr)); | |
1260 | data->cqr.cpaddr = &data->ccw; | |
1261 | rc = dasd_eckd_read_conf_immediately(device, &data->cqr, | |
1262 | data->rcd_buffer, | |
1263 | lpm); | |
1264 | if (!rc) { | |
1265 | switch (dasd_eckd_path_access(data->rcd_buffer, | |
1266 | DASD_ECKD_RCD_DATA_SIZE) | |
1267 | ) { | |
1268 | case 0x02: | |
1269 | npm |= lpm; | |
1270 | break; | |
1271 | case 0x03: | |
1272 | ppm |= lpm; | |
1273 | break; | |
1274 | } | |
1275 | opm |= lpm; | |
1276 | } else if (rc == -EOPNOTSUPP) { | |
1277 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
1278 | "path verification: No configuration " | |
1279 | "data retrieved"); | |
1280 | opm |= lpm; | |
1281 | } else if (rc == -EAGAIN) { | |
1282 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
a4d26c6a SW |
1283 | "path verification: device is stopped," |
1284 | " try again later"); | |
b206181d SH |
1285 | epm |= lpm; |
1286 | } else { | |
1287 | dev_warn(&device->cdev->dev, | |
1288 | "Reading device feature codes failed " | |
1289 | "(rc=%d) for new path %x\n", rc, lpm); | |
1290 | continue; | |
1291 | } | |
1292 | if (verify_fcx_max_data(device, lpm)) { | |
1293 | opm &= ~lpm; | |
1294 | npm &= ~lpm; | |
1295 | ppm &= ~lpm; | |
5db8440c | 1296 | hpfpm |= lpm; |
b206181d SH |
1297 | continue; |
1298 | } | |
1299 | ||
1300 | /* | |
1301 | * save conf_data for comparison after | |
1302 | * rebuild_device_uid may have changed | |
1303 | * the original data | |
1304 | */ | |
1305 | memcpy(&path_rcd_buf, data->rcd_buffer, | |
1306 | DASD_ECKD_RCD_DATA_SIZE); | |
1307 | path_private.conf_data = (void *) &path_rcd_buf; | |
1308 | path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; | |
1309 | if (dasd_eckd_identify_conf_parts(&path_private)) { | |
1310 | path_private.conf_data = NULL; | |
1311 | path_private.conf_len = 0; | |
1312 | continue; | |
1313 | } | |
1314 | ||
1315 | /* | |
1316 | * compare path UID with device UID only if at least | |
1317 | * one valid path is left | |
1318 | * in other case the device UID may have changed and | |
1319 | * the first working path UID will be used as device UID | |
1320 | */ | |
c9346151 | 1321 | if (dasd_path_get_opm(device) && |
b206181d SH |
1322 | dasd_eckd_compare_path_uid(device, &path_private)) { |
1323 | /* | |
1324 | * the comparison was not successful | |
1325 | * rebuild the device UID with at least one | |
1326 | * known path in case a z/VM hyperswap command | |
1327 | * has changed the device | |
1328 | * | |
1329 | * after this compare again | |
1330 | * | |
1331 | * if either the rebuild or the recompare fails | |
1332 | * the path can not be used | |
1333 | */ | |
1334 | if (rebuild_device_uid(device, data) || | |
1335 | dasd_eckd_compare_path_uid( | |
1336 | device, &path_private)) { | |
1337 | uid = &path_private.uid; | |
1338 | if (strlen(uid->vduit) > 0) | |
1339 | snprintf(print_uid, sizeof(print_uid), | |
1340 | "%s.%s.%04x.%02x.%s", | |
1341 | uid->vendor, uid->serial, | |
1342 | uid->ssid, uid->real_unit_addr, | |
1343 | uid->vduit); | |
1344 | else | |
1345 | snprintf(print_uid, sizeof(print_uid), | |
1346 | "%s.%s.%04x.%02x", | |
1347 | uid->vendor, uid->serial, | |
1348 | uid->ssid, | |
1349 | uid->real_unit_addr); | |
1350 | dev_err(&device->cdev->dev, | |
1351 | "The newly added channel path %02X " | |
1352 | "will not be used because it leads " | |
1353 | "to a different device %s\n", | |
1354 | lpm, print_uid); | |
a4d26c6a SW |
1355 | opm &= ~lpm; |
1356 | npm &= ~lpm; | |
1357 | ppm &= ~lpm; | |
5db8440c | 1358 | cablepm |= lpm; |
b206181d | 1359 | continue; |
a4d26c6a SW |
1360 | } |
1361 | } | |
b206181d SH |
1362 | |
1363 | /* | |
1364 | * There is a small chance that a path is lost again between | |
1365 | * above path verification and the following modification of | |
1366 | * the device opm mask. We could avoid that race here by using | |
1367 | * yet another path mask, but we rather deal with this unlikely | |
1368 | * situation in dasd_start_IO. | |
1369 | */ | |
1370 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); | |
c9346151 SH |
1371 | if (!dasd_path_get_opm(device) && opm) { |
1372 | dasd_path_set_opm(device, opm); | |
b206181d | 1373 | dasd_generic_path_operational(device); |
5db8440c | 1374 | } else { |
c9346151 | 1375 | dasd_path_add_opm(device, opm); |
5db8440c | 1376 | } |
c9346151 SH |
1377 | dasd_path_add_nppm(device, npm); |
1378 | dasd_path_add_ppm(device, ppm); | |
1379 | dasd_path_add_tbvpm(device, epm); | |
1380 | dasd_path_add_cablepm(device, cablepm); | |
1381 | dasd_path_add_nohpfpm(device, hpfpm); | |
b206181d | 1382 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
a4d26c6a | 1383 | } |
1eb38023 | 1384 | clear_bit(DASD_FLAG_PATH_VERIFY, &device->flags); |
a4d26c6a SW |
1385 | dasd_put_device(device); |
1386 | if (data->isglobal) | |
1387 | mutex_unlock(&dasd_path_verification_mutex); | |
1388 | else | |
1389 | kfree(data); | |
1390 | } | |
1391 | ||
1392 | static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm) | |
1393 | { | |
1394 | struct path_verification_work_data *data; | |
1395 | ||
1396 | data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); | |
1397 | if (!data) { | |
1398 | if (mutex_trylock(&dasd_path_verification_mutex)) { | |
1399 | data = path_verification_worker; | |
1400 | data->isglobal = 1; | |
1401 | } else | |
1402 | return -ENOMEM; | |
1403 | } else { | |
1404 | memset(data, 0, sizeof(*data)); | |
1405 | data->isglobal = 0; | |
1406 | } | |
1407 | INIT_WORK(&data->worker, do_path_verification_work); | |
1408 | dasd_get_device(device); | |
1409 | data->device = device; | |
1410 | data->tbvpm = lpm; | |
1411 | schedule_work(&data->worker); | |
1412 | return 0; | |
1413 | } | |
1414 | ||
a521b048 SH |
1415 | static void dasd_eckd_reset_path(struct dasd_device *device, __u8 pm) |
1416 | { | |
1417 | struct dasd_eckd_private *private = device->private; | |
1418 | unsigned long flags; | |
1419 | ||
1420 | if (!private->fcx_max_data) | |
1421 | private->fcx_max_data = get_fcx_max_data(device); | |
1422 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); | |
1423 | dasd_path_set_tbvpm(device, pm ? : dasd_path_get_notoperpm(device)); | |
1424 | dasd_schedule_device_bh(device); | |
1425 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); | |
1426 | } | |
1427 | ||
8e09f215 SW |
1428 | static int dasd_eckd_read_features(struct dasd_device *device) |
1429 | { | |
543691a4 | 1430 | struct dasd_eckd_private *private = device->private; |
8e09f215 SW |
1431 | struct dasd_psf_prssd_data *prssdp; |
1432 | struct dasd_rssd_features *features; | |
1433 | struct dasd_ccw_req *cqr; | |
1434 | struct ccw1 *ccw; | |
1435 | int rc; | |
8e09f215 | 1436 | |
68d1e5f0 | 1437 | memset(&private->features, 0, sizeof(struct dasd_rssd_features)); |
68b781fe | 1438 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, |
8e09f215 SW |
1439 | (sizeof(struct dasd_psf_prssd_data) + |
1440 | sizeof(struct dasd_rssd_features)), | |
1441 | device); | |
1442 | if (IS_ERR(cqr)) { | |
b8ed5dd5 SH |
1443 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " |
1444 | "allocate initialization request"); | |
8e09f215 SW |
1445 | return PTR_ERR(cqr); |
1446 | } | |
1447 | cqr->startdev = device; | |
1448 | cqr->memdev = device; | |
1449 | cqr->block = NULL; | |
eb6e199b | 1450 | cqr->retries = 256; |
8e09f215 SW |
1451 | cqr->expires = 10 * HZ; |
1452 | ||
1453 | /* Prepare for Read Subsystem Data */ | |
1454 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
1455 | memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); | |
1456 | prssdp->order = PSF_ORDER_PRSSD; | |
1457 | prssdp->suborder = 0x41; /* Read Feature Codes */ | |
1458 | /* all other bytes of prssdp must be zero */ | |
1459 | ||
1460 | ccw = cqr->cpaddr; | |
1461 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
1462 | ccw->count = sizeof(struct dasd_psf_prssd_data); | |
1463 | ccw->flags |= CCW_FLAG_CC; | |
1464 | ccw->cda = (__u32)(addr_t) prssdp; | |
1465 | ||
1466 | /* Read Subsystem Data - feature codes */ | |
1467 | features = (struct dasd_rssd_features *) (prssdp + 1); | |
1468 | memset(features, 0, sizeof(struct dasd_rssd_features)); | |
1469 | ||
1470 | ccw++; | |
1471 | ccw->cmd_code = DASD_ECKD_CCW_RSSD; | |
1472 | ccw->count = sizeof(struct dasd_rssd_features); | |
1473 | ccw->cda = (__u32)(addr_t) features; | |
1474 | ||
1aae0560 | 1475 | cqr->buildclk = get_tod_clock(); |
8e09f215 SW |
1476 | cqr->status = DASD_CQR_FILLED; |
1477 | rc = dasd_sleep_on(cqr); | |
1478 | if (rc == 0) { | |
1479 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
1480 | features = (struct dasd_rssd_features *) (prssdp + 1); | |
1481 | memcpy(&private->features, features, | |
1482 | sizeof(struct dasd_rssd_features)); | |
68d1e5f0 SW |
1483 | } else |
1484 | dev_warn(&device->cdev->dev, "Reading device feature codes" | |
1485 | " failed with rc=%d\n", rc); | |
8e09f215 SW |
1486 | dasd_sfree_request(cqr, cqr->memdev); |
1487 | return rc; | |
1488 | } | |
1489 | ||
1490 | ||
40545573 HH |
1491 | /* |
1492 | * Build CP for Perform Subsystem Function - SSC. | |
1493 | */ | |
f3eb5384 SW |
1494 | static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, |
1495 | int enable_pav) | |
40545573 | 1496 | { |
8e09f215 SW |
1497 | struct dasd_ccw_req *cqr; |
1498 | struct dasd_psf_ssc_data *psf_ssc_data; | |
1499 | struct ccw1 *ccw; | |
40545573 | 1500 | |
68b781fe | 1501 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , |
40545573 HH |
1502 | sizeof(struct dasd_psf_ssc_data), |
1503 | device); | |
1504 | ||
8e09f215 | 1505 | if (IS_ERR(cqr)) { |
fc19f381 | 1506 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
40545573 | 1507 | "Could not allocate PSF-SSC request"); |
8e09f215 SW |
1508 | return cqr; |
1509 | } | |
1510 | psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; | |
1511 | psf_ssc_data->order = PSF_ORDER_SSC; | |
626350b6 | 1512 | psf_ssc_data->suborder = 0xc0; |
f3eb5384 | 1513 | if (enable_pav) { |
626350b6 | 1514 | psf_ssc_data->suborder |= 0x08; |
f3eb5384 SW |
1515 | psf_ssc_data->reserved[0] = 0x88; |
1516 | } | |
8e09f215 SW |
1517 | ccw = cqr->cpaddr; |
1518 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
1519 | ccw->cda = (__u32)(addr_t)psf_ssc_data; | |
1520 | ccw->count = 66; | |
1521 | ||
1522 | cqr->startdev = device; | |
1523 | cqr->memdev = device; | |
1524 | cqr->block = NULL; | |
eb6e199b | 1525 | cqr->retries = 256; |
8e09f215 | 1526 | cqr->expires = 10*HZ; |
1aae0560 | 1527 | cqr->buildclk = get_tod_clock(); |
8e09f215 SW |
1528 | cqr->status = DASD_CQR_FILLED; |
1529 | return cqr; | |
40545573 HH |
1530 | } |
1531 | ||
1532 | /* | |
1533 | * Perform Subsystem Function. | |
1534 | * It is necessary to trigger CIO for channel revalidation since this | |
1535 | * call might change behaviour of DASD devices. | |
1536 | */ | |
1537 | static int | |
12d7b107 SH |
1538 | dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav, |
1539 | unsigned long flags) | |
40545573 | 1540 | { |
8e09f215 SW |
1541 | struct dasd_ccw_req *cqr; |
1542 | int rc; | |
1543 | ||
f3eb5384 | 1544 | cqr = dasd_eckd_build_psf_ssc(device, enable_pav); |
8e09f215 SW |
1545 | if (IS_ERR(cqr)) |
1546 | return PTR_ERR(cqr); | |
1547 | ||
12d7b107 SH |
1548 | /* |
1549 | * set flags e.g. turn on failfast, to prevent blocking | |
1550 | * the calling function should handle failed requests | |
1551 | */ | |
1552 | cqr->flags |= flags; | |
1553 | ||
8e09f215 SW |
1554 | rc = dasd_sleep_on(cqr); |
1555 | if (!rc) | |
1556 | /* trigger CIO to reprobe devices */ | |
1557 | css_schedule_reprobe(); | |
12d7b107 SH |
1558 | else if (cqr->intrc == -EAGAIN) |
1559 | rc = -EAGAIN; | |
1560 | ||
8e09f215 SW |
1561 | dasd_sfree_request(cqr, cqr->memdev); |
1562 | return rc; | |
40545573 HH |
1563 | } |
1564 | ||
1565 | /* | |
1566 | * Valide storage server of current device. | |
1567 | */ | |
12d7b107 SH |
1568 | static int dasd_eckd_validate_server(struct dasd_device *device, |
1569 | unsigned long flags) | |
40545573 | 1570 | { |
543691a4 SO |
1571 | struct dasd_eckd_private *private = device->private; |
1572 | int enable_pav, rc; | |
40545573 | 1573 | |
f9f8d02f SH |
1574 | if (private->uid.type == UA_BASE_PAV_ALIAS || |
1575 | private->uid.type == UA_HYPER_PAV_ALIAS) | |
12d7b107 | 1576 | return 0; |
40545573 | 1577 | if (dasd_nopav || MACHINE_IS_VM) |
f3eb5384 SW |
1578 | enable_pav = 0; |
1579 | else | |
1580 | enable_pav = 1; | |
12d7b107 | 1581 | rc = dasd_eckd_psf_ssc(device, enable_pav, flags); |
eb6e199b | 1582 | |
8e79a441 HH |
1583 | /* may be requested feature is not available on server, |
1584 | * therefore just report error and go ahead */ | |
b8ed5dd5 SH |
1585 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " |
1586 | "returned rc=%d", private->uid.ssid, rc); | |
12d7b107 | 1587 | return rc; |
40545573 HH |
1588 | } |
1589 | ||
f1633031 SH |
1590 | /* |
1591 | * worker to do a validate server in case of a lost pathgroup | |
1592 | */ | |
1593 | static void dasd_eckd_do_validate_server(struct work_struct *work) | |
1594 | { | |
1595 | struct dasd_device *device = container_of(work, struct dasd_device, | |
1596 | kick_validate); | |
ea4da6ea SH |
1597 | unsigned long flags = 0; |
1598 | ||
1599 | set_bit(DASD_CQR_FLAGS_FAILFAST, &flags); | |
1600 | if (dasd_eckd_validate_server(device, flags) | |
12d7b107 SH |
1601 | == -EAGAIN) { |
1602 | /* schedule worker again if failed */ | |
1603 | schedule_work(&device->kick_validate); | |
1604 | return; | |
1605 | } | |
1606 | ||
f1633031 SH |
1607 | dasd_put_device(device); |
1608 | } | |
1609 | ||
1610 | static void dasd_eckd_kick_validate_server(struct dasd_device *device) | |
1611 | { | |
1612 | dasd_get_device(device); | |
25e2cf1c SH |
1613 | /* exit if device not online or in offline processing */ |
1614 | if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || | |
1615 | device->state < DASD_STATE_ONLINE) { | |
1616 | dasd_put_device(device); | |
1617 | return; | |
1618 | } | |
f1633031 | 1619 | /* queue call to do_validate_server to the kernel event daemon. */ |
f2608cd4 SH |
1620 | if (!schedule_work(&device->kick_validate)) |
1621 | dasd_put_device(device); | |
f1633031 SH |
1622 | } |
1623 | ||
3d052595 HH |
1624 | /* |
1625 | * Check device characteristics. | |
1626 | * If the device is accessible using ECKD discipline, the device is enabled. | |
1627 | */ | |
1da177e4 LT |
1628 | static int |
1629 | dasd_eckd_check_characteristics(struct dasd_device *device) | |
1630 | { | |
543691a4 | 1631 | struct dasd_eckd_private *private = device->private; |
8e09f215 | 1632 | struct dasd_block *block; |
2dedf0d9 | 1633 | struct dasd_uid temp_uid; |
f9f8d02f | 1634 | int rc, i; |
33b62a30 | 1635 | int readonly; |
7c8faa86 | 1636 | unsigned long value; |
1da177e4 | 1637 | |
f1633031 SH |
1638 | /* setup work queue for validate server*/ |
1639 | INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); | |
59a9ed5f SH |
1640 | /* setup work queue for summary unit check */ |
1641 | INIT_WORK(&device->suc_work, dasd_alias_handle_summary_unit_check); | |
f1633031 | 1642 | |
454e1fa1 PO |
1643 | if (!ccw_device_is_pathgroup(device->cdev)) { |
1644 | dev_warn(&device->cdev->dev, | |
1645 | "A channel path group could not be established\n"); | |
1646 | return -EIO; | |
1647 | } | |
1648 | if (!ccw_device_is_multipath(device->cdev)) { | |
1649 | dev_info(&device->cdev->dev, | |
1650 | "The DASD is not operating in multipath mode\n"); | |
1651 | } | |
92636b15 SO |
1652 | if (!private) { |
1653 | private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); | |
1654 | if (!private) { | |
fc19f381 SH |
1655 | dev_warn(&device->cdev->dev, |
1656 | "Allocating memory for private DASD data " | |
1657 | "failed\n"); | |
1da177e4 LT |
1658 | return -ENOMEM; |
1659 | } | |
543691a4 | 1660 | device->private = private; |
92636b15 SO |
1661 | } else { |
1662 | memset(private, 0, sizeof(*private)); | |
1da177e4 LT |
1663 | } |
1664 | /* Invalidate status of initial analysis. */ | |
1665 | private->init_cqr_status = -1; | |
1666 | /* Set default cache operations. */ | |
1667 | private->attrib.operation = DASD_NORMAL_CACHE; | |
1668 | private->attrib.nr_cyl = 0; | |
1669 | ||
40545573 HH |
1670 | /* Read Configuration Data */ |
1671 | rc = dasd_eckd_read_conf(device); | |
1672 | if (rc) | |
8e09f215 | 1673 | goto out_err1; |
40545573 | 1674 | |
a521b048 | 1675 | /* set some default values */ |
7c8faa86 | 1676 | device->default_expires = DASD_EXPIRES; |
1f1ee9ad | 1677 | device->default_retries = DASD_RETRIES; |
a521b048 SH |
1678 | device->path_thrhld = DASD_ECKD_PATH_THRHLD; |
1679 | device->path_interval = DASD_ECKD_PATH_INTERVAL; | |
1f1ee9ad | 1680 | |
7c8faa86 SH |
1681 | if (private->gneq) { |
1682 | value = 1; | |
1683 | for (i = 0; i < private->gneq->timeout.value; i++) | |
1684 | value = 10 * value; | |
1685 | value = value * private->gneq->timeout.number; | |
1686 | /* do not accept useless values */ | |
1687 | if (value != 0 && value <= DASD_EXPIRES_MAX) | |
1688 | device->default_expires = value; | |
1689 | } | |
1690 | ||
2dedf0d9 SH |
1691 | dasd_eckd_get_uid(device, &temp_uid); |
1692 | if (temp_uid.type == UA_BASE_DEVICE) { | |
8e09f215 SW |
1693 | block = dasd_alloc_block(); |
1694 | if (IS_ERR(block)) { | |
b8ed5dd5 SH |
1695 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", |
1696 | "could not allocate dasd " | |
1697 | "block structure"); | |
8e09f215 SW |
1698 | rc = PTR_ERR(block); |
1699 | goto out_err1; | |
1700 | } | |
1701 | device->block = block; | |
1702 | block->base = device; | |
1703 | } | |
1704 | ||
f9f8d02f SH |
1705 | /* register lcu with alias handling, enable PAV */ |
1706 | rc = dasd_alias_make_device_known_to_lcu(device); | |
1707 | if (rc) | |
8e09f215 | 1708 | goto out_err2; |
f9f8d02f | 1709 | |
12d7b107 | 1710 | dasd_eckd_validate_server(device, 0); |
f4ac1d02 SW |
1711 | |
1712 | /* device may report different configuration data after LCU setup */ | |
1713 | rc = dasd_eckd_read_conf(device); | |
1714 | if (rc) | |
1715 | goto out_err3; | |
8e09f215 SW |
1716 | |
1717 | /* Read Feature Codes */ | |
68d1e5f0 | 1718 | dasd_eckd_read_features(device); |
40545573 | 1719 | |
1da177e4 | 1720 | /* Read Device Characteristics */ |
68b781fe SH |
1721 | rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, |
1722 | &private->rdc_data, 64); | |
8e09f215 | 1723 | if (rc) { |
b8ed5dd5 SH |
1724 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, |
1725 | "Read device characteristic failed, rc=%d", rc); | |
8e09f215 SW |
1726 | goto out_err3; |
1727 | } | |
34cd551a SH |
1728 | |
1729 | if ((device->features & DASD_FEATURE_USERAW) && | |
1730 | !(private->rdc_data.facilities.RT_in_LR)) { | |
1731 | dev_err(&device->cdev->dev, "The storage server does not " | |
1732 | "support raw-track access\n"); | |
1733 | rc = -EINVAL; | |
1734 | goto out_err3; | |
1735 | } | |
1736 | ||
817f2c84 | 1737 | /* find the valid cylinder size */ |
b44b0ab3 SW |
1738 | if (private->rdc_data.no_cyl == LV_COMPAT_CYL && |
1739 | private->rdc_data.long_no_cyl) | |
1740 | private->real_cyl = private->rdc_data.long_no_cyl; | |
1741 | else | |
1742 | private->real_cyl = private->rdc_data.no_cyl; | |
1743 | ||
ef19298b SW |
1744 | private->fcx_max_data = get_fcx_max_data(device); |
1745 | ||
33b62a30 SW |
1746 | readonly = dasd_device_is_ro(device); |
1747 | if (readonly) | |
1748 | set_bit(DASD_FLAG_DEVICE_RO, &device->flags); | |
1749 | ||
fc19f381 | 1750 | dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " |
33b62a30 | 1751 | "with %d cylinders, %d heads, %d sectors%s\n", |
fc19f381 SH |
1752 | private->rdc_data.dev_type, |
1753 | private->rdc_data.dev_model, | |
1754 | private->rdc_data.cu_type, | |
1755 | private->rdc_data.cu_model.model, | |
92636b15 | 1756 | private->real_cyl, |
fc19f381 | 1757 | private->rdc_data.trk_per_cyl, |
33b62a30 SW |
1758 | private->rdc_data.sec_per_trk, |
1759 | readonly ? ", read-only device" : ""); | |
8e09f215 SW |
1760 | return 0; |
1761 | ||
1762 | out_err3: | |
1763 | dasd_alias_disconnect_device_from_lcu(device); | |
1764 | out_err2: | |
1765 | dasd_free_block(device->block); | |
1766 | device->block = NULL; | |
1767 | out_err1: | |
4abb08c2 | 1768 | kfree(private->conf_data); |
8e09f215 SW |
1769 | kfree(device->private); |
1770 | device->private = NULL; | |
3d052595 | 1771 | return rc; |
1da177e4 LT |
1772 | } |
1773 | ||
8e09f215 SW |
1774 | static void dasd_eckd_uncheck_device(struct dasd_device *device) |
1775 | { | |
543691a4 | 1776 | struct dasd_eckd_private *private = device->private; |
b179b037 | 1777 | int i; |
4abb08c2 | 1778 | |
8e09f215 | 1779 | dasd_alias_disconnect_device_from_lcu(device); |
4abb08c2 SW |
1780 | private->ned = NULL; |
1781 | private->sneq = NULL; | |
1782 | private->vdsneq = NULL; | |
1783 | private->gneq = NULL; | |
1784 | private->conf_len = 0; | |
b179b037 | 1785 | for (i = 0; i < 8; i++) { |
c9346151 SH |
1786 | kfree(device->path[i].conf_data); |
1787 | if ((__u8 *)device->path[i].conf_data == | |
b179b037 SH |
1788 | private->conf_data) { |
1789 | private->conf_data = NULL; | |
1790 | private->conf_len = 0; | |
1791 | } | |
c9346151 | 1792 | device->path[i].conf_data = NULL; |
a521b048 SH |
1793 | device->path[i].cssid = 0; |
1794 | device->path[i].ssid = 0; | |
1795 | device->path[i].chpid = 0; | |
b179b037 | 1796 | } |
4abb08c2 SW |
1797 | kfree(private->conf_data); |
1798 | private->conf_data = NULL; | |
8e09f215 SW |
1799 | } |
1800 | ||
1da177e4 LT |
1801 | static struct dasd_ccw_req * |
1802 | dasd_eckd_analysis_ccw(struct dasd_device *device) | |
1803 | { | |
543691a4 | 1804 | struct dasd_eckd_private *private = device->private; |
1da177e4 LT |
1805 | struct eckd_count *count_data; |
1806 | struct LO_eckd_data *LO_data; | |
1807 | struct dasd_ccw_req *cqr; | |
1808 | struct ccw1 *ccw; | |
1809 | int cplength, datasize; | |
1810 | int i; | |
1811 | ||
1da177e4 LT |
1812 | cplength = 8; |
1813 | datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); | |
68b781fe | 1814 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); |
1da177e4 LT |
1815 | if (IS_ERR(cqr)) |
1816 | return cqr; | |
1817 | ccw = cqr->cpaddr; | |
1818 | /* Define extent for the first 3 tracks. */ | |
1819 | define_extent(ccw++, cqr->data, 0, 2, | |
45f186be | 1820 | DASD_ECKD_CCW_READ_COUNT, device, 0); |
8e09f215 | 1821 | LO_data = cqr->data + sizeof(struct DE_eckd_data); |
1da177e4 LT |
1822 | /* Locate record for the first 4 records on track 0. */ |
1823 | ccw[-1].flags |= CCW_FLAG_CC; | |
1824 | locate_record(ccw++, LO_data++, 0, 0, 4, | |
1825 | DASD_ECKD_CCW_READ_COUNT, device, 0); | |
1826 | ||
1827 | count_data = private->count_area; | |
1828 | for (i = 0; i < 4; i++) { | |
1829 | ccw[-1].flags |= CCW_FLAG_CC; | |
1830 | ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; | |
1831 | ccw->flags = 0; | |
1832 | ccw->count = 8; | |
1833 | ccw->cda = (__u32)(addr_t) count_data; | |
1834 | ccw++; | |
1835 | count_data++; | |
1836 | } | |
1837 | ||
1838 | /* Locate record for the first record on track 2. */ | |
1839 | ccw[-1].flags |= CCW_FLAG_CC; | |
1840 | locate_record(ccw++, LO_data++, 2, 0, 1, | |
1841 | DASD_ECKD_CCW_READ_COUNT, device, 0); | |
1842 | /* Read count ccw. */ | |
1843 | ccw[-1].flags |= CCW_FLAG_CC; | |
1844 | ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; | |
1845 | ccw->flags = 0; | |
1846 | ccw->count = 8; | |
1847 | ccw->cda = (__u32)(addr_t) count_data; | |
1848 | ||
8e09f215 SW |
1849 | cqr->block = NULL; |
1850 | cqr->startdev = device; | |
1851 | cqr->memdev = device; | |
eb6e199b | 1852 | cqr->retries = 255; |
1aae0560 | 1853 | cqr->buildclk = get_tod_clock(); |
1da177e4 LT |
1854 | cqr->status = DASD_CQR_FILLED; |
1855 | return cqr; | |
1856 | } | |
1857 | ||
eb6e199b SW |
1858 | /* differentiate between 'no record found' and any other error */ |
1859 | static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) | |
1860 | { | |
1861 | char *sense; | |
1862 | if (init_cqr->status == DASD_CQR_DONE) | |
1863 | return INIT_CQR_OK; | |
1864 | else if (init_cqr->status == DASD_CQR_NEED_ERP || | |
1865 | init_cqr->status == DASD_CQR_FAILED) { | |
1866 | sense = dasd_get_sense(&init_cqr->irb); | |
1867 | if (sense && (sense[1] & SNS1_NO_REC_FOUND)) | |
1868 | return INIT_CQR_UNFORMATTED; | |
1869 | else | |
1870 | return INIT_CQR_ERROR; | |
1871 | } else | |
1872 | return INIT_CQR_ERROR; | |
1873 | } | |
1874 | ||
1da177e4 LT |
1875 | /* |
1876 | * This is the callback function for the init_analysis cqr. It saves | |
1877 | * the status of the initial analysis ccw before it frees it and kicks | |
1878 | * the device to continue the startup sequence. This will call | |
1879 | * dasd_eckd_do_analysis again (if the devices has not been marked | |
1880 | * for deletion in the meantime). | |
1881 | */ | |
eb6e199b SW |
1882 | static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, |
1883 | void *data) | |
1da177e4 | 1884 | { |
543691a4 SO |
1885 | struct dasd_device *device = init_cqr->startdev; |
1886 | struct dasd_eckd_private *private = device->private; | |
1da177e4 | 1887 | |
eb6e199b | 1888 | private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); |
1da177e4 LT |
1889 | dasd_sfree_request(init_cqr, device); |
1890 | dasd_kick_device(device); | |
1891 | } | |
1892 | ||
eb6e199b | 1893 | static int dasd_eckd_start_analysis(struct dasd_block *block) |
1da177e4 | 1894 | { |
1da177e4 LT |
1895 | struct dasd_ccw_req *init_cqr; |
1896 | ||
8e09f215 | 1897 | init_cqr = dasd_eckd_analysis_ccw(block->base); |
1da177e4 LT |
1898 | if (IS_ERR(init_cqr)) |
1899 | return PTR_ERR(init_cqr); | |
1900 | init_cqr->callback = dasd_eckd_analysis_callback; | |
1901 | init_cqr->callback_data = NULL; | |
1902 | init_cqr->expires = 5*HZ; | |
eb6e199b SW |
1903 | /* first try without ERP, so we can later handle unformatted |
1904 | * devices as special case | |
1905 | */ | |
1906 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); | |
1907 | init_cqr->retries = 0; | |
1da177e4 LT |
1908 | dasd_add_request_head(init_cqr); |
1909 | return -EAGAIN; | |
1910 | } | |
1911 | ||
eb6e199b | 1912 | static int dasd_eckd_end_analysis(struct dasd_block *block) |
1da177e4 | 1913 | { |
543691a4 SO |
1914 | struct dasd_device *device = block->base; |
1915 | struct dasd_eckd_private *private = device->private; | |
1da177e4 LT |
1916 | struct eckd_count *count_area; |
1917 | unsigned int sb, blk_per_trk; | |
1918 | int status, i; | |
eb6e199b | 1919 | struct dasd_ccw_req *init_cqr; |
1da177e4 | 1920 | |
1da177e4 LT |
1921 | status = private->init_cqr_status; |
1922 | private->init_cqr_status = -1; | |
eb6e199b SW |
1923 | if (status == INIT_CQR_ERROR) { |
1924 | /* try again, this time with full ERP */ | |
1925 | init_cqr = dasd_eckd_analysis_ccw(device); | |
1926 | dasd_sleep_on(init_cqr); | |
1927 | status = dasd_eckd_analysis_evaluation(init_cqr); | |
1928 | dasd_sfree_request(init_cqr, device); | |
1929 | } | |
1930 | ||
e4dbb0f2 SH |
1931 | if (device->features & DASD_FEATURE_USERAW) { |
1932 | block->bp_block = DASD_RAW_BLOCKSIZE; | |
1933 | blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; | |
1934 | block->s2b_shift = 3; | |
1935 | goto raw; | |
1936 | } | |
1937 | ||
eb6e199b SW |
1938 | if (status == INIT_CQR_UNFORMATTED) { |
1939 | dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); | |
1da177e4 | 1940 | return -EMEDIUMTYPE; |
eb6e199b SW |
1941 | } else if (status == INIT_CQR_ERROR) { |
1942 | dev_err(&device->cdev->dev, | |
1943 | "Detecting the DASD disk layout failed because " | |
1944 | "of an I/O error\n"); | |
1945 | return -EIO; | |
1da177e4 LT |
1946 | } |
1947 | ||
1948 | private->uses_cdl = 1; | |
1da177e4 LT |
1949 | /* Check Track 0 for Compatible Disk Layout */ |
1950 | count_area = NULL; | |
1951 | for (i = 0; i < 3; i++) { | |
1952 | if (private->count_area[i].kl != 4 || | |
3bc9fef9 SH |
1953 | private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 || |
1954 | private->count_area[i].cyl != 0 || | |
1955 | private->count_area[i].head != count_area_head[i] || | |
1956 | private->count_area[i].record != count_area_rec[i]) { | |
1da177e4 LT |
1957 | private->uses_cdl = 0; |
1958 | break; | |
1959 | } | |
1960 | } | |
1961 | if (i == 3) | |
1962 | count_area = &private->count_area[4]; | |
1963 | ||
1964 | if (private->uses_cdl == 0) { | |
1965 | for (i = 0; i < 5; i++) { | |
1966 | if ((private->count_area[i].kl != 0) || | |
1967 | (private->count_area[i].dl != | |
3bc9fef9 SH |
1968 | private->count_area[0].dl) || |
1969 | private->count_area[i].cyl != 0 || | |
1970 | private->count_area[i].head != count_area_head[i] || | |
1971 | private->count_area[i].record != count_area_rec[i]) | |
1da177e4 LT |
1972 | break; |
1973 | } | |
1974 | if (i == 5) | |
1975 | count_area = &private->count_area[0]; | |
1976 | } else { | |
1977 | if (private->count_area[3].record == 1) | |
fc19f381 SH |
1978 | dev_warn(&device->cdev->dev, |
1979 | "Track 0 has no records following the VTOC\n"); | |
1da177e4 | 1980 | } |
e4dbb0f2 | 1981 | |
1da177e4 LT |
1982 | if (count_area != NULL && count_area->kl == 0) { |
1983 | /* we found notthing violating our disk layout */ | |
1984 | if (dasd_check_blocksize(count_area->dl) == 0) | |
8e09f215 | 1985 | block->bp_block = count_area->dl; |
1da177e4 | 1986 | } |
8e09f215 | 1987 | if (block->bp_block == 0) { |
fc19f381 SH |
1988 | dev_warn(&device->cdev->dev, |
1989 | "The disk layout of the DASD is not supported\n"); | |
1da177e4 LT |
1990 | return -EMEDIUMTYPE; |
1991 | } | |
8e09f215 SW |
1992 | block->s2b_shift = 0; /* bits to shift 512 to get a block */ |
1993 | for (sb = 512; sb < block->bp_block; sb = sb << 1) | |
1994 | block->s2b_shift++; | |
1da177e4 | 1995 | |
8e09f215 | 1996 | blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); |
e4dbb0f2 SH |
1997 | |
1998 | raw: | |
b44b0ab3 | 1999 | block->blocks = (private->real_cyl * |
1da177e4 LT |
2000 | private->rdc_data.trk_per_cyl * |
2001 | blk_per_trk); | |
2002 | ||
fc19f381 SH |
2003 | dev_info(&device->cdev->dev, |
2004 | "DASD with %d KB/block, %d KB total size, %d KB/track, " | |
2005 | "%s\n", (block->bp_block >> 10), | |
2006 | ((private->real_cyl * | |
2007 | private->rdc_data.trk_per_cyl * | |
2008 | blk_per_trk * (block->bp_block >> 9)) >> 1), | |
2009 | ((blk_per_trk * block->bp_block) >> 10), | |
2010 | private->uses_cdl ? | |
2011 | "compatible disk layout" : "linux disk layout"); | |
1da177e4 LT |
2012 | |
2013 | return 0; | |
2014 | } | |
2015 | ||
8e09f215 | 2016 | static int dasd_eckd_do_analysis(struct dasd_block *block) |
1da177e4 | 2017 | { |
543691a4 | 2018 | struct dasd_eckd_private *private = block->base->private; |
1da177e4 | 2019 | |
1da177e4 | 2020 | if (private->init_cqr_status < 0) |
8e09f215 | 2021 | return dasd_eckd_start_analysis(block); |
1da177e4 | 2022 | else |
8e09f215 | 2023 | return dasd_eckd_end_analysis(block); |
1da177e4 LT |
2024 | } |
2025 | ||
d42e1712 | 2026 | static int dasd_eckd_basic_to_ready(struct dasd_device *device) |
8e09f215 SW |
2027 | { |
2028 | return dasd_alias_add_device(device); | |
2029 | }; | |
2030 | ||
2031 | static int dasd_eckd_online_to_ready(struct dasd_device *device) | |
2032 | { | |
501183f2 | 2033 | cancel_work_sync(&device->reload_device); |
25e2cf1c | 2034 | cancel_work_sync(&device->kick_validate); |
d42e1712 SH |
2035 | return 0; |
2036 | }; | |
2037 | ||
daa991bf | 2038 | static int dasd_eckd_basic_to_known(struct dasd_device *device) |
d42e1712 | 2039 | { |
8e09f215 SW |
2040 | return dasd_alias_remove_device(device); |
2041 | }; | |
2042 | ||
1da177e4 | 2043 | static int |
8e09f215 | 2044 | dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) |
1da177e4 | 2045 | { |
543691a4 | 2046 | struct dasd_eckd_private *private = block->base->private; |
1da177e4 | 2047 | |
8e09f215 | 2048 | if (dasd_check_blocksize(block->bp_block) == 0) { |
1da177e4 | 2049 | geo->sectors = recs_per_track(&private->rdc_data, |
8e09f215 | 2050 | 0, block->bp_block); |
1da177e4 LT |
2051 | } |
2052 | geo->cylinders = private->rdc_data.no_cyl; | |
2053 | geo->heads = private->rdc_data.trk_per_cyl; | |
2054 | return 0; | |
2055 | } | |
2056 | ||
8fd57520 JH |
2057 | /* |
2058 | * Build the TCW request for the format check | |
2059 | */ | |
2060 | static struct dasd_ccw_req * | |
2061 | dasd_eckd_build_check_tcw(struct dasd_device *base, struct format_data_t *fdata, | |
2062 | int enable_pav, struct eckd_count *fmt_buffer, | |
2063 | int rpt) | |
2064 | { | |
2065 | struct dasd_eckd_private *start_priv; | |
2066 | struct dasd_device *startdev = NULL; | |
2067 | struct tidaw *last_tidaw = NULL; | |
2068 | struct dasd_ccw_req *cqr; | |
2069 | struct itcw *itcw; | |
2070 | int itcw_size; | |
2071 | int count; | |
2072 | int rc; | |
2073 | int i; | |
2074 | ||
2075 | if (enable_pav) | |
2076 | startdev = dasd_alias_get_start_dev(base); | |
2077 | ||
2078 | if (!startdev) | |
2079 | startdev = base; | |
2080 | ||
2081 | start_priv = startdev->private; | |
2082 | ||
2083 | count = rpt * (fdata->stop_unit - fdata->start_unit + 1); | |
2084 | ||
2085 | /* | |
2086 | * we're adding 'count' amount of tidaw to the itcw. | |
2087 | * calculate the corresponding itcw_size | |
2088 | */ | |
2089 | itcw_size = itcw_calc_size(0, count, 0); | |
2090 | ||
2091 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); | |
2092 | if (IS_ERR(cqr)) | |
2093 | return cqr; | |
2094 | ||
2095 | start_priv->count++; | |
2096 | ||
2097 | itcw = itcw_init(cqr->data, itcw_size, ITCW_OP_READ, 0, count, 0); | |
2098 | if (IS_ERR(itcw)) { | |
2099 | rc = -EINVAL; | |
2100 | goto out_err; | |
2101 | } | |
2102 | ||
2103 | cqr->cpaddr = itcw_get_tcw(itcw); | |
2104 | rc = prepare_itcw(itcw, fdata->start_unit, fdata->stop_unit, | |
2105 | DASD_ECKD_CCW_READ_COUNT_MT, base, startdev, 0, count, | |
2106 | sizeof(struct eckd_count), | |
2107 | count * sizeof(struct eckd_count), 0, rpt); | |
2108 | if (rc) | |
2109 | goto out_err; | |
2110 | ||
2111 | for (i = 0; i < count; i++) { | |
2112 | last_tidaw = itcw_add_tidaw(itcw, 0, fmt_buffer++, | |
2113 | sizeof(struct eckd_count)); | |
2114 | if (IS_ERR(last_tidaw)) { | |
2115 | rc = -EINVAL; | |
2116 | goto out_err; | |
2117 | } | |
2118 | } | |
2119 | ||
2120 | last_tidaw->flags |= TIDAW_FLAGS_LAST; | |
2121 | itcw_finalize(itcw); | |
2122 | ||
2123 | cqr->cpmode = 1; | |
2124 | cqr->startdev = startdev; | |
2125 | cqr->memdev = startdev; | |
2126 | cqr->basedev = base; | |
2127 | cqr->retries = startdev->default_retries; | |
2128 | cqr->expires = startdev->default_expires * HZ; | |
2129 | cqr->buildclk = get_tod_clock(); | |
2130 | cqr->status = DASD_CQR_FILLED; | |
2131 | /* Set flags to suppress output for expected errors */ | |
2132 | set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); | |
2133 | set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); | |
2134 | ||
2135 | return cqr; | |
2136 | ||
2137 | out_err: | |
2138 | dasd_sfree_request(cqr, startdev); | |
2139 | ||
2140 | return ERR_PTR(rc); | |
2141 | } | |
2142 | ||
2143 | /* | |
2144 | * Build the CCW request for the format check | |
2145 | */ | |
2146 | static struct dasd_ccw_req * | |
2147 | dasd_eckd_build_check(struct dasd_device *base, struct format_data_t *fdata, | |
2148 | int enable_pav, struct eckd_count *fmt_buffer, int rpt) | |
2149 | { | |
2150 | struct dasd_eckd_private *start_priv; | |
2151 | struct dasd_eckd_private *base_priv; | |
2152 | struct dasd_device *startdev = NULL; | |
2153 | struct dasd_ccw_req *cqr; | |
2154 | struct ccw1 *ccw; | |
2155 | void *data; | |
2156 | int cplength, datasize; | |
2157 | int use_prefix; | |
2158 | int count; | |
2159 | int i; | |
2160 | ||
2161 | if (enable_pav) | |
2162 | startdev = dasd_alias_get_start_dev(base); | |
2163 | ||
2164 | if (!startdev) | |
2165 | startdev = base; | |
2166 | ||
2167 | start_priv = startdev->private; | |
2168 | base_priv = base->private; | |
2169 | ||
2170 | count = rpt * (fdata->stop_unit - fdata->start_unit + 1); | |
2171 | ||
2172 | use_prefix = base_priv->features.feature[8] & 0x01; | |
2173 | ||
2174 | if (use_prefix) { | |
2175 | cplength = 1; | |
2176 | datasize = sizeof(struct PFX_eckd_data); | |
2177 | } else { | |
2178 | cplength = 2; | |
2179 | datasize = sizeof(struct DE_eckd_data) + | |
2180 | sizeof(struct LO_eckd_data); | |
2181 | } | |
2182 | cplength += count; | |
2183 | ||
2184 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, | |
2185 | startdev); | |
2186 | if (IS_ERR(cqr)) | |
2187 | return cqr; | |
2188 | ||
2189 | start_priv->count++; | |
2190 | data = cqr->data; | |
2191 | ccw = cqr->cpaddr; | |
2192 | ||
2193 | if (use_prefix) { | |
2194 | prefix_LRE(ccw++, data, fdata->start_unit, fdata->stop_unit, | |
2195 | DASD_ECKD_CCW_READ_COUNT, base, startdev, 1, 0, | |
2196 | count, 0, 0); | |
2197 | } else { | |
2198 | define_extent(ccw++, data, fdata->start_unit, fdata->stop_unit, | |
45f186be | 2199 | DASD_ECKD_CCW_READ_COUNT, startdev, 0); |
8fd57520 JH |
2200 | |
2201 | data += sizeof(struct DE_eckd_data); | |
2202 | ccw[-1].flags |= CCW_FLAG_CC; | |
2203 | ||
2204 | locate_record(ccw++, data, fdata->start_unit, 0, count, | |
2205 | DASD_ECKD_CCW_READ_COUNT, base, 0); | |
2206 | } | |
2207 | ||
2208 | for (i = 0; i < count; i++) { | |
2209 | ccw[-1].flags |= CCW_FLAG_CC; | |
2210 | ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; | |
2211 | ccw->flags = CCW_FLAG_SLI; | |
2212 | ccw->count = 8; | |
2213 | ccw->cda = (__u32)(addr_t) fmt_buffer; | |
2214 | ccw++; | |
2215 | fmt_buffer++; | |
2216 | } | |
2217 | ||
2218 | cqr->startdev = startdev; | |
2219 | cqr->memdev = startdev; | |
2220 | cqr->basedev = base; | |
2221 | cqr->retries = DASD_RETRIES; | |
2222 | cqr->expires = startdev->default_expires * HZ; | |
2223 | cqr->buildclk = get_tod_clock(); | |
2224 | cqr->status = DASD_CQR_FILLED; | |
2225 | /* Set flags to suppress output for expected errors */ | |
2226 | set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); | |
2227 | ||
2228 | return cqr; | |
2229 | } | |
2230 | ||
1da177e4 | 2231 | static struct dasd_ccw_req * |
d42e1712 | 2232 | dasd_eckd_build_format(struct dasd_device *base, |
29b8dd9d | 2233 | struct format_data_t *fdata, |
a94fa154 | 2234 | int enable_pav) |
1da177e4 | 2235 | { |
d42e1712 SH |
2236 | struct dasd_eckd_private *base_priv; |
2237 | struct dasd_eckd_private *start_priv; | |
29b8dd9d | 2238 | struct dasd_device *startdev = NULL; |
1da177e4 LT |
2239 | struct dasd_ccw_req *fcp; |
2240 | struct eckd_count *ect; | |
d42e1712 | 2241 | struct ch_t address; |
1da177e4 LT |
2242 | struct ccw1 *ccw; |
2243 | void *data; | |
b44b0ab3 | 2244 | int rpt; |
1da177e4 | 2245 | int cplength, datasize; |
d42e1712 | 2246 | int i, j; |
f9a28f7b JBJ |
2247 | int intensity = 0; |
2248 | int r0_perm; | |
d42e1712 | 2249 | int nr_tracks; |
18d6624e | 2250 | int use_prefix; |
1da177e4 | 2251 | |
a94fa154 | 2252 | if (enable_pav) |
29b8dd9d SH |
2253 | startdev = dasd_alias_get_start_dev(base); |
2254 | ||
d42e1712 SH |
2255 | if (!startdev) |
2256 | startdev = base; | |
1da177e4 | 2257 | |
543691a4 SO |
2258 | start_priv = startdev->private; |
2259 | base_priv = base->private; | |
d42e1712 SH |
2260 | |
2261 | rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize); | |
2262 | ||
2263 | nr_tracks = fdata->stop_unit - fdata->start_unit + 1; | |
1da177e4 LT |
2264 | |
2265 | /* | |
2266 | * fdata->intensity is a bit string that tells us what to do: | |
2267 | * Bit 0: write record zero | |
2268 | * Bit 1: write home address, currently not supported | |
2269 | * Bit 2: invalidate tracks | |
2270 | * Bit 3: use OS/390 compatible disk layout (cdl) | |
f9a28f7b | 2271 | * Bit 4: do not allow storage subsystem to modify record zero |
1da177e4 LT |
2272 | * Only some bit combinations do make sense. |
2273 | */ | |
f9a28f7b JBJ |
2274 | if (fdata->intensity & 0x10) { |
2275 | r0_perm = 0; | |
2276 | intensity = fdata->intensity & ~0x10; | |
2277 | } else { | |
2278 | r0_perm = 1; | |
2279 | intensity = fdata->intensity; | |
2280 | } | |
d42e1712 | 2281 | |
18d6624e SH |
2282 | use_prefix = base_priv->features.feature[8] & 0x01; |
2283 | ||
f9a28f7b | 2284 | switch (intensity) { |
1da177e4 LT |
2285 | case 0x00: /* Normal format */ |
2286 | case 0x08: /* Normal format, use cdl. */ | |
d42e1712 | 2287 | cplength = 2 + (rpt*nr_tracks); |
18d6624e SH |
2288 | if (use_prefix) |
2289 | datasize = sizeof(struct PFX_eckd_data) + | |
2290 | sizeof(struct LO_eckd_data) + | |
2291 | rpt * nr_tracks * sizeof(struct eckd_count); | |
2292 | else | |
2293 | datasize = sizeof(struct DE_eckd_data) + | |
2294 | sizeof(struct LO_eckd_data) + | |
2295 | rpt * nr_tracks * sizeof(struct eckd_count); | |
1da177e4 LT |
2296 | break; |
2297 | case 0x01: /* Write record zero and format track. */ | |
2298 | case 0x09: /* Write record zero and format track, use cdl. */ | |
d42e1712 | 2299 | cplength = 2 + rpt * nr_tracks; |
18d6624e SH |
2300 | if (use_prefix) |
2301 | datasize = sizeof(struct PFX_eckd_data) + | |
2302 | sizeof(struct LO_eckd_data) + | |
2303 | sizeof(struct eckd_count) + | |
2304 | rpt * nr_tracks * sizeof(struct eckd_count); | |
2305 | else | |
2306 | datasize = sizeof(struct DE_eckd_data) + | |
2307 | sizeof(struct LO_eckd_data) + | |
2308 | sizeof(struct eckd_count) + | |
2309 | rpt * nr_tracks * sizeof(struct eckd_count); | |
1da177e4 LT |
2310 | break; |
2311 | case 0x04: /* Invalidate track. */ | |
2312 | case 0x0c: /* Invalidate track, use cdl. */ | |
2313 | cplength = 3; | |
18d6624e SH |
2314 | if (use_prefix) |
2315 | datasize = sizeof(struct PFX_eckd_data) + | |
2316 | sizeof(struct LO_eckd_data) + | |
2317 | sizeof(struct eckd_count); | |
2318 | else | |
2319 | datasize = sizeof(struct DE_eckd_data) + | |
2320 | sizeof(struct LO_eckd_data) + | |
2321 | sizeof(struct eckd_count); | |
1da177e4 LT |
2322 | break; |
2323 | default: | |
d42e1712 SH |
2324 | dev_warn(&startdev->cdev->dev, |
2325 | "An I/O control call used incorrect flags 0x%x\n", | |
2326 | fdata->intensity); | |
1da177e4 LT |
2327 | return ERR_PTR(-EINVAL); |
2328 | } | |
2329 | /* Allocate the format ccw request. */ | |
d42e1712 SH |
2330 | fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, |
2331 | datasize, startdev); | |
1da177e4 LT |
2332 | if (IS_ERR(fcp)) |
2333 | return fcp; | |
2334 | ||
d42e1712 | 2335 | start_priv->count++; |
1da177e4 LT |
2336 | data = fcp->data; |
2337 | ccw = fcp->cpaddr; | |
2338 | ||
f9a28f7b | 2339 | switch (intensity & ~0x08) { |
1da177e4 | 2340 | case 0x00: /* Normal format. */ |
18d6624e SH |
2341 | if (use_prefix) { |
2342 | prefix(ccw++, (struct PFX_eckd_data *) data, | |
2343 | fdata->start_unit, fdata->stop_unit, | |
2344 | DASD_ECKD_CCW_WRITE_CKD, base, startdev); | |
2345 | /* grant subsystem permission to format R0 */ | |
2346 | if (r0_perm) | |
2347 | ((struct PFX_eckd_data *)data) | |
2348 | ->define_extent.ga_extended |= 0x04; | |
2349 | data += sizeof(struct PFX_eckd_data); | |
2350 | } else { | |
2351 | define_extent(ccw++, (struct DE_eckd_data *) data, | |
2352 | fdata->start_unit, fdata->stop_unit, | |
45f186be | 2353 | DASD_ECKD_CCW_WRITE_CKD, startdev, 0); |
18d6624e SH |
2354 | /* grant subsystem permission to format R0 */ |
2355 | if (r0_perm) | |
2356 | ((struct DE_eckd_data *) data) | |
2357 | ->ga_extended |= 0x04; | |
2358 | data += sizeof(struct DE_eckd_data); | |
2359 | } | |
1da177e4 LT |
2360 | ccw[-1].flags |= CCW_FLAG_CC; |
2361 | locate_record(ccw++, (struct LO_eckd_data *) data, | |
d42e1712 SH |
2362 | fdata->start_unit, 0, rpt*nr_tracks, |
2363 | DASD_ECKD_CCW_WRITE_CKD, base, | |
1da177e4 LT |
2364 | fdata->blksize); |
2365 | data += sizeof(struct LO_eckd_data); | |
2366 | break; | |
2367 | case 0x01: /* Write record zero + format track. */ | |
18d6624e SH |
2368 | if (use_prefix) { |
2369 | prefix(ccw++, (struct PFX_eckd_data *) data, | |
2370 | fdata->start_unit, fdata->stop_unit, | |
2371 | DASD_ECKD_CCW_WRITE_RECORD_ZERO, | |
2372 | base, startdev); | |
2373 | data += sizeof(struct PFX_eckd_data); | |
2374 | } else { | |
2375 | define_extent(ccw++, (struct DE_eckd_data *) data, | |
2376 | fdata->start_unit, fdata->stop_unit, | |
45f186be | 2377 | DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev, 0); |
18d6624e SH |
2378 | data += sizeof(struct DE_eckd_data); |
2379 | } | |
1da177e4 LT |
2380 | ccw[-1].flags |= CCW_FLAG_CC; |
2381 | locate_record(ccw++, (struct LO_eckd_data *) data, | |
d42e1712 SH |
2382 | fdata->start_unit, 0, rpt * nr_tracks + 1, |
2383 | DASD_ECKD_CCW_WRITE_RECORD_ZERO, base, | |
2384 | base->block->bp_block); | |
1da177e4 LT |
2385 | data += sizeof(struct LO_eckd_data); |
2386 | break; | |
2387 | case 0x04: /* Invalidate track. */ | |
18d6624e SH |
2388 | if (use_prefix) { |
2389 | prefix(ccw++, (struct PFX_eckd_data *) data, | |
2390 | fdata->start_unit, fdata->stop_unit, | |
2391 | DASD_ECKD_CCW_WRITE_CKD, base, startdev); | |
2392 | data += sizeof(struct PFX_eckd_data); | |
2393 | } else { | |
2394 | define_extent(ccw++, (struct DE_eckd_data *) data, | |
2395 | fdata->start_unit, fdata->stop_unit, | |
45f186be | 2396 | DASD_ECKD_CCW_WRITE_CKD, startdev, 0); |
18d6624e SH |
2397 | data += sizeof(struct DE_eckd_data); |
2398 | } | |
1da177e4 LT |
2399 | ccw[-1].flags |= CCW_FLAG_CC; |
2400 | locate_record(ccw++, (struct LO_eckd_data *) data, | |
2401 | fdata->start_unit, 0, 1, | |
d42e1712 | 2402 | DASD_ECKD_CCW_WRITE_CKD, base, 8); |
1da177e4 LT |
2403 | data += sizeof(struct LO_eckd_data); |
2404 | break; | |
2405 | } | |
d42e1712 SH |
2406 | |
2407 | for (j = 0; j < nr_tracks; j++) { | |
2408 | /* calculate cylinder and head for the current track */ | |
2409 | set_ch_t(&address, | |
2410 | (fdata->start_unit + j) / | |
2411 | base_priv->rdc_data.trk_per_cyl, | |
2412 | (fdata->start_unit + j) % | |
2413 | base_priv->rdc_data.trk_per_cyl); | |
2414 | if (intensity & 0x01) { /* write record zero */ | |
1da177e4 LT |
2415 | ect = (struct eckd_count *) data; |
2416 | data += sizeof(struct eckd_count); | |
b44b0ab3 SW |
2417 | ect->cyl = address.cyl; |
2418 | ect->head = address.head; | |
d42e1712 | 2419 | ect->record = 0; |
1da177e4 | 2420 | ect->kl = 0; |
d42e1712 | 2421 | ect->dl = 8; |
1da177e4 | 2422 | ccw[-1].flags |= CCW_FLAG_CC; |
d42e1712 | 2423 | ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; |
1da177e4 LT |
2424 | ccw->flags = CCW_FLAG_SLI; |
2425 | ccw->count = 8; | |
2426 | ccw->cda = (__u32)(addr_t) ect; | |
2427 | ccw++; | |
2428 | } | |
d42e1712 SH |
2429 | if ((intensity & ~0x08) & 0x04) { /* erase track */ |
2430 | ect = (struct eckd_count *) data; | |
2431 | data += sizeof(struct eckd_count); | |
2432 | ect->cyl = address.cyl; | |
2433 | ect->head = address.head; | |
2434 | ect->record = 1; | |
2435 | ect->kl = 0; | |
2436 | ect->dl = 0; | |
2437 | ccw[-1].flags |= CCW_FLAG_CC; | |
2438 | ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; | |
2439 | ccw->flags = CCW_FLAG_SLI; | |
2440 | ccw->count = 8; | |
2441 | ccw->cda = (__u32)(addr_t) ect; | |
2442 | } else { /* write remaining records */ | |
2443 | for (i = 0; i < rpt; i++) { | |
2444 | ect = (struct eckd_count *) data; | |
2445 | data += sizeof(struct eckd_count); | |
2446 | ect->cyl = address.cyl; | |
2447 | ect->head = address.head; | |
2448 | ect->record = i + 1; | |
2449 | ect->kl = 0; | |
2450 | ect->dl = fdata->blksize; | |
2451 | /* | |
2452 | * Check for special tracks 0-1 | |
2453 | * when formatting CDL | |
2454 | */ | |
2455 | if ((intensity & 0x08) && | |
46d1c03c | 2456 | address.cyl == 0 && address.head == 0) { |
d42e1712 SH |
2457 | if (i < 3) { |
2458 | ect->kl = 4; | |
2459 | ect->dl = sizes_trk0[i] - 4; | |
2460 | } | |
2461 | } | |
2462 | if ((intensity & 0x08) && | |
46d1c03c | 2463 | address.cyl == 0 && address.head == 1) { |
d42e1712 SH |
2464 | ect->kl = 44; |
2465 | ect->dl = LABEL_SIZE - 44; | |
2466 | } | |
2467 | ccw[-1].flags |= CCW_FLAG_CC; | |
2468 | if (i != 0 || j == 0) | |
2469 | ccw->cmd_code = | |
2470 | DASD_ECKD_CCW_WRITE_CKD; | |
2471 | else | |
2472 | ccw->cmd_code = | |
2473 | DASD_ECKD_CCW_WRITE_CKD_MT; | |
2474 | ccw->flags = CCW_FLAG_SLI; | |
2475 | ccw->count = 8; | |
ba21d0ea SH |
2476 | ccw->cda = (__u32)(addr_t) ect; |
2477 | ccw++; | |
d42e1712 SH |
2478 | } |
2479 | } | |
1da177e4 | 2480 | } |
d42e1712 SH |
2481 | |
2482 | fcp->startdev = startdev; | |
2483 | fcp->memdev = startdev; | |
29b8dd9d | 2484 | fcp->basedev = base; |
eb6e199b | 2485 | fcp->retries = 256; |
d42e1712 | 2486 | fcp->expires = startdev->default_expires * HZ; |
1aae0560 | 2487 | fcp->buildclk = get_tod_clock(); |
1da177e4 | 2488 | fcp->status = DASD_CQR_FILLED; |
d42e1712 | 2489 | |
1da177e4 LT |
2490 | return fcp; |
2491 | } | |
2492 | ||
570d237c JH |
2493 | /* |
2494 | * Wrapper function to build a CCW request depending on input data | |
2495 | */ | |
2496 | static struct dasd_ccw_req * | |
2497 | dasd_eckd_format_build_ccw_req(struct dasd_device *base, | |
8fd57520 JH |
2498 | struct format_data_t *fdata, int enable_pav, |
2499 | int tpm, struct eckd_count *fmt_buffer, int rpt) | |
570d237c | 2500 | { |
8fd57520 JH |
2501 | struct dasd_ccw_req *ccw_req; |
2502 | ||
2503 | if (!fmt_buffer) { | |
2504 | ccw_req = dasd_eckd_build_format(base, fdata, enable_pav); | |
2505 | } else { | |
2506 | if (tpm) | |
2507 | ccw_req = dasd_eckd_build_check_tcw(base, fdata, | |
2508 | enable_pav, | |
2509 | fmt_buffer, rpt); | |
2510 | else | |
2511 | ccw_req = dasd_eckd_build_check(base, fdata, enable_pav, | |
2512 | fmt_buffer, rpt); | |
2513 | } | |
2514 | ||
2515 | return ccw_req; | |
570d237c JH |
2516 | } |
2517 | ||
2518 | /* | |
2519 | * Sanity checks on format_data | |
2520 | */ | |
2521 | static int dasd_eckd_format_sanity_checks(struct dasd_device *base, | |
2522 | struct format_data_t *fdata) | |
d42e1712 | 2523 | { |
543691a4 | 2524 | struct dasd_eckd_private *private = base->private; |
d42e1712 | 2525 | |
d42e1712 SH |
2526 | if (fdata->start_unit >= |
2527 | (private->real_cyl * private->rdc_data.trk_per_cyl)) { | |
2528 | dev_warn(&base->cdev->dev, | |
2529 | "Start track number %u used in formatting is too big\n", | |
2530 | fdata->start_unit); | |
2531 | return -EINVAL; | |
2532 | } | |
2533 | if (fdata->stop_unit >= | |
2534 | (private->real_cyl * private->rdc_data.trk_per_cyl)) { | |
2535 | dev_warn(&base->cdev->dev, | |
2536 | "Stop track number %u used in formatting is too big\n", | |
2537 | fdata->stop_unit); | |
2538 | return -EINVAL; | |
2539 | } | |
2540 | if (fdata->start_unit > fdata->stop_unit) { | |
2541 | dev_warn(&base->cdev->dev, | |
2542 | "Start track %u used in formatting exceeds end track\n", | |
2543 | fdata->start_unit); | |
2544 | return -EINVAL; | |
2545 | } | |
2546 | if (dasd_check_blocksize(fdata->blksize) != 0) { | |
2547 | dev_warn(&base->cdev->dev, | |
2548 | "The DASD cannot be formatted with block size %u\n", | |
2549 | fdata->blksize); | |
2550 | return -EINVAL; | |
2551 | } | |
570d237c JH |
2552 | return 0; |
2553 | } | |
2554 | ||
2555 | /* | |
2556 | * This function will process format_data originally coming from an IOCTL | |
2557 | */ | |
2558 | static int dasd_eckd_format_process_data(struct dasd_device *base, | |
2559 | struct format_data_t *fdata, | |
8fd57520 JH |
2560 | int enable_pav, int tpm, |
2561 | struct eckd_count *fmt_buffer, int rpt, | |
2562 | struct irb *irb) | |
570d237c | 2563 | { |
543691a4 | 2564 | struct dasd_eckd_private *private = base->private; |
570d237c | 2565 | struct dasd_ccw_req *cqr, *n; |
570d237c JH |
2566 | struct list_head format_queue; |
2567 | struct dasd_device *device; | |
8fd57520 | 2568 | char *sense = NULL; |
570d237c JH |
2569 | int old_start, old_stop, format_step; |
2570 | int step, retry; | |
2571 | int rc; | |
2572 | ||
570d237c JH |
2573 | rc = dasd_eckd_format_sanity_checks(base, fdata); |
2574 | if (rc) | |
2575 | return rc; | |
d42e1712 SH |
2576 | |
2577 | INIT_LIST_HEAD(&format_queue); | |
d42e1712 | 2578 | |
46d1c03c | 2579 | old_start = fdata->start_unit; |
29b8dd9d | 2580 | old_stop = fdata->stop_unit; |
d42e1712 | 2581 | |
8fd57520 JH |
2582 | if (!tpm && fmt_buffer != NULL) { |
2583 | /* Command Mode / Format Check */ | |
2584 | format_step = 1; | |
2585 | } else if (tpm && fmt_buffer != NULL) { | |
2586 | /* Transport Mode / Format Check */ | |
2587 | format_step = DASD_CQR_MAX_CCW / rpt; | |
2588 | } else { | |
2589 | /* Normal Formatting */ | |
2590 | format_step = DASD_CQR_MAX_CCW / | |
2591 | recs_per_track(&private->rdc_data, 0, fdata->blksize); | |
2592 | } | |
2593 | ||
46d1c03c JH |
2594 | do { |
2595 | retry = 0; | |
2596 | while (fdata->start_unit <= old_stop) { | |
2597 | step = fdata->stop_unit - fdata->start_unit + 1; | |
2598 | if (step > format_step) { | |
2599 | fdata->stop_unit = | |
2600 | fdata->start_unit + format_step - 1; | |
2601 | } | |
d42e1712 | 2602 | |
570d237c | 2603 | cqr = dasd_eckd_format_build_ccw_req(base, fdata, |
8fd57520 JH |
2604 | enable_pav, tpm, |
2605 | fmt_buffer, rpt); | |
46d1c03c JH |
2606 | if (IS_ERR(cqr)) { |
2607 | rc = PTR_ERR(cqr); | |
2608 | if (rc == -ENOMEM) { | |
2609 | if (list_empty(&format_queue)) | |
2610 | goto out; | |
2611 | /* | |
2612 | * not enough memory available, start | |
2613 | * requests retry after first requests | |
2614 | * were finished | |
2615 | */ | |
2616 | retry = 1; | |
2617 | break; | |
2618 | } | |
2619 | goto out_err; | |
2620 | } | |
2621 | list_add_tail(&cqr->blocklist, &format_queue); | |
d42e1712 | 2622 | |
8fd57520 JH |
2623 | if (fmt_buffer) { |
2624 | step = fdata->stop_unit - fdata->start_unit + 1; | |
2625 | fmt_buffer += rpt * step; | |
2626 | } | |
46d1c03c JH |
2627 | fdata->start_unit = fdata->stop_unit + 1; |
2628 | fdata->stop_unit = old_stop; | |
d42e1712 | 2629 | } |
d42e1712 | 2630 | |
46d1c03c JH |
2631 | rc = dasd_sleep_on_queue(&format_queue); |
2632 | ||
2633 | out_err: | |
2634 | list_for_each_entry_safe(cqr, n, &format_queue, blocklist) { | |
2635 | device = cqr->startdev; | |
543691a4 | 2636 | private = device->private; |
8fd57520 JH |
2637 | |
2638 | if (cqr->status == DASD_CQR_FAILED) { | |
2639 | /* | |
2640 | * Only get sense data if called by format | |
2641 | * check | |
2642 | */ | |
2643 | if (fmt_buffer && irb) { | |
2644 | sense = dasd_get_sense(&cqr->irb); | |
2645 | memcpy(irb, &cqr->irb, sizeof(*irb)); | |
2646 | } | |
46d1c03c | 2647 | rc = -EIO; |
8fd57520 | 2648 | } |
46d1c03c JH |
2649 | list_del_init(&cqr->blocklist); |
2650 | dasd_sfree_request(cqr, device); | |
2651 | private->count--; | |
2652 | } | |
d42e1712 | 2653 | |
8fd57520 | 2654 | if (rc && rc != -EIO) |
46d1c03c | 2655 | goto out; |
8fd57520 JH |
2656 | if (rc == -EIO) { |
2657 | /* | |
2658 | * In case fewer than the expected records are on the | |
2659 | * track, we will most likely get a 'No Record Found' | |
2660 | * error (in command mode) or a 'File Protected' error | |
2661 | * (in transport mode). Those particular cases shouldn't | |
2662 | * pass the -EIO to the IOCTL, therefore reset the rc | |
2663 | * and continue. | |
2664 | */ | |
2665 | if (sense && | |
2666 | (sense[1] & SNS1_NO_REC_FOUND || | |
2667 | sense[1] & SNS1_FILE_PROTECTED)) | |
2668 | retry = 1; | |
2669 | else | |
2670 | goto out; | |
2671 | } | |
d42e1712 | 2672 | |
46d1c03c | 2673 | } while (retry); |
29b8dd9d | 2674 | |
46d1c03c JH |
2675 | out: |
2676 | fdata->start_unit = old_start; | |
2677 | fdata->stop_unit = old_stop; | |
d42e1712 SH |
2678 | |
2679 | return rc; | |
2680 | } | |
2681 | ||
570d237c JH |
2682 | static int dasd_eckd_format_device(struct dasd_device *base, |
2683 | struct format_data_t *fdata, int enable_pav) | |
2684 | { | |
8fd57520 JH |
2685 | return dasd_eckd_format_process_data(base, fdata, enable_pav, 0, NULL, |
2686 | 0, NULL); | |
2687 | } | |
2688 | ||
2689 | /* | |
2690 | * Helper function to count consecutive records of a single track. | |
2691 | */ | |
2692 | static int dasd_eckd_count_records(struct eckd_count *fmt_buffer, int start, | |
2693 | int max) | |
2694 | { | |
2695 | int head; | |
2696 | int i; | |
2697 | ||
2698 | head = fmt_buffer[start].head; | |
2699 | ||
2700 | /* | |
2701 | * There are 3 conditions where we stop counting: | |
2702 | * - if data reoccurs (same head and record may reoccur), which may | |
2703 | * happen due to the way DASD_ECKD_CCW_READ_COUNT works | |
2704 | * - when the head changes, because we're iterating over several tracks | |
2705 | * then (DASD_ECKD_CCW_READ_COUNT_MT) | |
2706 | * - when we've reached the end of sensible data in the buffer (the | |
2707 | * record will be 0 then) | |
2708 | */ | |
2709 | for (i = start; i < max; i++) { | |
2710 | if (i > start) { | |
2711 | if ((fmt_buffer[i].head == head && | |
2712 | fmt_buffer[i].record == 1) || | |
2713 | fmt_buffer[i].head != head || | |
2714 | fmt_buffer[i].record == 0) | |
2715 | break; | |
2716 | } | |
2717 | } | |
2718 | ||
2719 | return i - start; | |
2720 | } | |
2721 | ||
2722 | /* | |
2723 | * Evaluate a given range of tracks. Data like number of records, blocksize, | |
2724 | * record ids, and key length are compared with expected data. | |
2725 | * | |
2726 | * If a mismatch occurs, the corresponding error bit is set, as well as | |
2727 | * additional information, depending on the error. | |
2728 | */ | |
2729 | static void dasd_eckd_format_evaluate_tracks(struct eckd_count *fmt_buffer, | |
2730 | struct format_check_t *cdata, | |
2731 | int rpt_max, int rpt_exp, | |
2732 | int trk_per_cyl, int tpm) | |
2733 | { | |
2734 | struct ch_t geo; | |
2735 | int max_entries; | |
2736 | int count = 0; | |
2737 | int trkcount; | |
2738 | int blksize; | |
2739 | int pos = 0; | |
2740 | int i, j; | |
2741 | int kl; | |
2742 | ||
2743 | trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; | |
2744 | max_entries = trkcount * rpt_max; | |
2745 | ||
2746 | for (i = cdata->expect.start_unit; i <= cdata->expect.stop_unit; i++) { | |
2747 | /* Calculate the correct next starting position in the buffer */ | |
2748 | if (tpm) { | |
2749 | while (fmt_buffer[pos].record == 0 && | |
2750 | fmt_buffer[pos].dl == 0) { | |
2751 | if (pos++ > max_entries) | |
2752 | break; | |
2753 | } | |
2754 | } else { | |
2755 | if (i != cdata->expect.start_unit) | |
2756 | pos += rpt_max - count; | |
2757 | } | |
2758 | ||
2759 | /* Calculate the expected geo values for the current track */ | |
2760 | set_ch_t(&geo, i / trk_per_cyl, i % trk_per_cyl); | |
2761 | ||
2762 | /* Count and check number of records */ | |
2763 | count = dasd_eckd_count_records(fmt_buffer, pos, pos + rpt_max); | |
2764 | ||
2765 | if (count < rpt_exp) { | |
2766 | cdata->result = DASD_FMT_ERR_TOO_FEW_RECORDS; | |
2767 | break; | |
2768 | } | |
2769 | if (count > rpt_exp) { | |
2770 | cdata->result = DASD_FMT_ERR_TOO_MANY_RECORDS; | |
2771 | break; | |
2772 | } | |
2773 | ||
2774 | for (j = 0; j < count; j++, pos++) { | |
2775 | blksize = cdata->expect.blksize; | |
2776 | kl = 0; | |
2777 | ||
2778 | /* | |
2779 | * Set special values when checking CDL formatted | |
2780 | * devices. | |
2781 | */ | |
2782 | if ((cdata->expect.intensity & 0x08) && | |
2783 | geo.cyl == 0 && geo.head == 0) { | |
2784 | if (j < 3) { | |
2785 | blksize = sizes_trk0[j] - 4; | |
2786 | kl = 4; | |
2787 | } | |
2788 | } | |
2789 | if ((cdata->expect.intensity & 0x08) && | |
2790 | geo.cyl == 0 && geo.head == 1) { | |
2791 | blksize = LABEL_SIZE - 44; | |
2792 | kl = 44; | |
2793 | } | |
2794 | ||
2795 | /* Check blocksize */ | |
2796 | if (fmt_buffer[pos].dl != blksize) { | |
2797 | cdata->result = DASD_FMT_ERR_BLKSIZE; | |
2798 | goto out; | |
2799 | } | |
2800 | /* Check if key length is 0 */ | |
2801 | if (fmt_buffer[pos].kl != kl) { | |
2802 | cdata->result = DASD_FMT_ERR_KEY_LENGTH; | |
2803 | goto out; | |
2804 | } | |
2805 | /* Check if record_id is correct */ | |
2806 | if (fmt_buffer[pos].cyl != geo.cyl || | |
2807 | fmt_buffer[pos].head != geo.head || | |
2808 | fmt_buffer[pos].record != (j + 1)) { | |
2809 | cdata->result = DASD_FMT_ERR_RECORD_ID; | |
2810 | goto out; | |
2811 | } | |
2812 | } | |
2813 | } | |
2814 | ||
2815 | out: | |
2816 | /* | |
2817 | * In case of no errors, we need to decrease by one | |
2818 | * to get the correct positions. | |
2819 | */ | |
2820 | if (!cdata->result) { | |
2821 | i--; | |
2822 | pos--; | |
2823 | } | |
2824 | ||
2825 | cdata->unit = i; | |
2826 | cdata->num_records = count; | |
2827 | cdata->rec = fmt_buffer[pos].record; | |
2828 | cdata->blksize = fmt_buffer[pos].dl; | |
2829 | cdata->key_length = fmt_buffer[pos].kl; | |
2830 | } | |
2831 | ||
2832 | /* | |
2833 | * Check the format of a range of tracks of a DASD. | |
2834 | */ | |
2835 | static int dasd_eckd_check_device_format(struct dasd_device *base, | |
2836 | struct format_check_t *cdata, | |
2837 | int enable_pav) | |
2838 | { | |
2839 | struct dasd_eckd_private *private = base->private; | |
2840 | struct eckd_count *fmt_buffer; | |
2841 | struct irb irb; | |
2842 | int rpt_max, rpt_exp; | |
2843 | int fmt_buffer_size; | |
2844 | int trk_per_cyl; | |
2845 | int trkcount; | |
2846 | int tpm = 0; | |
2847 | int rc; | |
2848 | ||
2849 | trk_per_cyl = private->rdc_data.trk_per_cyl; | |
2850 | ||
2851 | /* Get maximum and expected amount of records per track */ | |
2852 | rpt_max = recs_per_track(&private->rdc_data, 0, 512) + 1; | |
2853 | rpt_exp = recs_per_track(&private->rdc_data, 0, cdata->expect.blksize); | |
2854 | ||
2855 | trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; | |
2856 | fmt_buffer_size = trkcount * rpt_max * sizeof(struct eckd_count); | |
2857 | ||
2858 | fmt_buffer = kzalloc(fmt_buffer_size, GFP_KERNEL | GFP_DMA); | |
2859 | if (!fmt_buffer) | |
2860 | return -ENOMEM; | |
2861 | ||
2862 | /* | |
2863 | * A certain FICON feature subset is needed to operate in transport | |
2864 | * mode. Additionally, the support for transport mode is implicitly | |
2865 | * checked by comparing the buffer size with fcx_max_data. As long as | |
2866 | * the buffer size is smaller we can operate in transport mode and | |
2867 | * process multiple tracks. If not, only one track at once is being | |
2868 | * processed using command mode. | |
2869 | */ | |
2870 | if ((private->features.feature[40] & 0x04) && | |
2871 | fmt_buffer_size <= private->fcx_max_data) | |
2872 | tpm = 1; | |
2873 | ||
2874 | rc = dasd_eckd_format_process_data(base, &cdata->expect, enable_pav, | |
2875 | tpm, fmt_buffer, rpt_max, &irb); | |
2876 | if (rc && rc != -EIO) | |
2877 | goto out; | |
2878 | if (rc == -EIO) { | |
2879 | /* | |
2880 | * If our first attempt with transport mode enabled comes back | |
2881 | * with an incorrect length error, we're going to retry the | |
2882 | * check with command mode. | |
2883 | */ | |
2884 | if (tpm && scsw_cstat(&irb.scsw) == 0x40) { | |
2885 | tpm = 0; | |
2886 | rc = dasd_eckd_format_process_data(base, &cdata->expect, | |
2887 | enable_pav, tpm, | |
2888 | fmt_buffer, rpt_max, | |
2889 | &irb); | |
2890 | if (rc) | |
2891 | goto out; | |
2892 | } else { | |
2893 | goto out; | |
2894 | } | |
2895 | } | |
2896 | ||
2897 | dasd_eckd_format_evaluate_tracks(fmt_buffer, cdata, rpt_max, rpt_exp, | |
2898 | trk_per_cyl, tpm); | |
2899 | ||
2900 | out: | |
2901 | kfree(fmt_buffer); | |
2902 | ||
2903 | return rc; | |
570d237c JH |
2904 | } |
2905 | ||
8e09f215 | 2906 | static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) |
1da177e4 | 2907 | { |
a2ace466 HR |
2908 | if (cqr->retries < 0) { |
2909 | cqr->status = DASD_CQR_FAILED; | |
2910 | return; | |
2911 | } | |
8e09f215 SW |
2912 | cqr->status = DASD_CQR_FILLED; |
2913 | if (cqr->block && (cqr->startdev != cqr->block->base)) { | |
2914 | dasd_eckd_reset_ccw_to_base_io(cqr); | |
2915 | cqr->startdev = cqr->block->base; | |
c9346151 | 2916 | cqr->lpm = dasd_path_get_opm(cqr->block->base); |
1da177e4 | 2917 | } |
8e09f215 | 2918 | }; |
1da177e4 LT |
2919 | |
2920 | static dasd_erp_fn_t | |
2921 | dasd_eckd_erp_action(struct dasd_ccw_req * cqr) | |
2922 | { | |
8e09f215 | 2923 | struct dasd_device *device = (struct dasd_device *) cqr->startdev; |
1da177e4 LT |
2924 | struct ccw_device *cdev = device->cdev; |
2925 | ||
2926 | switch (cdev->id.cu_type) { | |
2927 | case 0x3990: | |
2928 | case 0x2105: | |
2929 | case 0x2107: | |
2930 | case 0x1750: | |
2931 | return dasd_3990_erp_action; | |
2932 | case 0x9343: | |
2933 | case 0x3880: | |
2934 | default: | |
2935 | return dasd_default_erp_action; | |
2936 | } | |
2937 | } | |
2938 | ||
2939 | static dasd_erp_fn_t | |
2940 | dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) | |
2941 | { | |
2942 | return dasd_default_erp_postaction; | |
2943 | } | |
2944 | ||
5a27e60d SW |
2945 | static void dasd_eckd_check_for_device_change(struct dasd_device *device, |
2946 | struct dasd_ccw_req *cqr, | |
2947 | struct irb *irb) | |
8e09f215 SW |
2948 | { |
2949 | char mask; | |
f3eb5384 | 2950 | char *sense = NULL; |
543691a4 | 2951 | struct dasd_eckd_private *private = device->private; |
8e09f215 SW |
2952 | |
2953 | /* first of all check for state change pending interrupt */ | |
2954 | mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; | |
f3eb5384 | 2955 | if ((scsw_dstat(&irb->scsw) & mask) == mask) { |
c8d1c0ff SH |
2956 | /* |
2957 | * for alias only, not in offline processing | |
2958 | * and only if not suspended | |
2959 | */ | |
501183f2 | 2960 | if (!device->block && private->lcu && |
25e2cf1c | 2961 | device->state == DASD_STATE_ONLINE && |
c8d1c0ff SH |
2962 | !test_bit(DASD_FLAG_OFFLINE, &device->flags) && |
2963 | !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { | |
501183f2 SH |
2964 | /* schedule worker to reload device */ |
2965 | dasd_reload_device(device); | |
2966 | } | |
8e09f215 SW |
2967 | dasd_generic_handle_state_change(device); |
2968 | return; | |
2969 | } | |
2970 | ||
a5a0061f | 2971 | sense = dasd_get_sense(irb); |
5a27e60d SW |
2972 | if (!sense) |
2973 | return; | |
2974 | ||
2975 | /* summary unit check */ | |
c7a29e56 | 2976 | if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && |
a5a0061f | 2977 | (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { |
59a9ed5f SH |
2978 | if (test_and_set_bit(DASD_FLAG_SUC, &device->flags)) { |
2979 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", | |
2980 | "eckd suc: device already notified"); | |
2981 | return; | |
2982 | } | |
2983 | sense = dasd_get_sense(irb); | |
2984 | if (!sense) { | |
2985 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", | |
2986 | "eckd suc: no reason code available"); | |
2987 | clear_bit(DASD_FLAG_SUC, &device->flags); | |
2988 | return; | |
2989 | ||
2990 | } | |
2991 | private->suc_reason = sense[8]; | |
2992 | DBF_DEV_EVENT(DBF_NOTICE, device, "%s %x", | |
2993 | "eckd handle summary unit check: reason", | |
2994 | private->suc_reason); | |
2995 | dasd_get_device(device); | |
2996 | if (!schedule_work(&device->suc_work)) | |
2997 | dasd_put_device(device); | |
2998 | ||
8e09f215 SW |
2999 | return; |
3000 | } | |
3001 | ||
f60c768c | 3002 | /* service information message SIM */ |
5a27e60d | 3003 | if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && |
f3eb5384 SW |
3004 | ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { |
3005 | dasd_3990_erp_handle_sim(device, sense); | |
f60c768c SH |
3006 | return; |
3007 | } | |
3008 | ||
5a27e60d SW |
3009 | /* loss of device reservation is handled via base devices only |
3010 | * as alias devices may be used with several bases | |
3011 | */ | |
c7a29e56 SW |
3012 | if (device->block && (sense[27] & DASD_SENSE_BIT_0) && |
3013 | (sense[7] == 0x3F) && | |
5a27e60d SW |
3014 | (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && |
3015 | test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { | |
3016 | if (device->features & DASD_FEATURE_FAILONSLCK) | |
3017 | set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); | |
3018 | clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); | |
3019 | dev_err(&device->cdev->dev, | |
3020 | "The device reservation was lost\n"); | |
ada3df91 | 3021 | } |
5a27e60d | 3022 | } |
f3eb5384 SW |
3023 | |
3024 | static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( | |
3025 | struct dasd_device *startdev, | |
8e09f215 | 3026 | struct dasd_block *block, |
f3eb5384 SW |
3027 | struct request *req, |
3028 | sector_t first_rec, | |
3029 | sector_t last_rec, | |
3030 | sector_t first_trk, | |
3031 | sector_t last_trk, | |
3032 | unsigned int first_offs, | |
3033 | unsigned int last_offs, | |
3034 | unsigned int blk_per_trk, | |
3035 | unsigned int blksize) | |
1da177e4 LT |
3036 | { |
3037 | struct dasd_eckd_private *private; | |
3038 | unsigned long *idaws; | |
3039 | struct LO_eckd_data *LO_data; | |
3040 | struct dasd_ccw_req *cqr; | |
3041 | struct ccw1 *ccw; | |
5705f702 | 3042 | struct req_iterator iter; |
7988613b | 3043 | struct bio_vec bv; |
1da177e4 | 3044 | char *dst; |
f3eb5384 | 3045 | unsigned int off; |
1da177e4 | 3046 | int count, cidaw, cplength, datasize; |
f3eb5384 | 3047 | sector_t recid; |
1da177e4 | 3048 | unsigned char cmd, rcmd; |
8e09f215 SW |
3049 | int use_prefix; |
3050 | struct dasd_device *basedev; | |
1da177e4 | 3051 | |
8e09f215 | 3052 | basedev = block->base; |
543691a4 | 3053 | private = basedev->private; |
1da177e4 LT |
3054 | if (rq_data_dir(req) == READ) |
3055 | cmd = DASD_ECKD_CCW_READ_MT; | |
3056 | else if (rq_data_dir(req) == WRITE) | |
3057 | cmd = DASD_ECKD_CCW_WRITE_MT; | |
3058 | else | |
3059 | return ERR_PTR(-EINVAL); | |
f3eb5384 | 3060 | |
1da177e4 LT |
3061 | /* Check struct bio and count the number of blocks for the request. */ |
3062 | count = 0; | |
3063 | cidaw = 0; | |
5705f702 | 3064 | rq_for_each_segment(bv, req, iter) { |
7988613b | 3065 | if (bv.bv_len & (blksize - 1)) |
6c92e699 JA |
3066 | /* Eckd can only do full blocks. */ |
3067 | return ERR_PTR(-EINVAL); | |
7988613b | 3068 | count += bv.bv_len >> (block->s2b_shift + 9); |
7988613b KO |
3069 | if (idal_is_needed (page_address(bv.bv_page), bv.bv_len)) |
3070 | cidaw += bv.bv_len >> (block->s2b_shift + 9); | |
1da177e4 LT |
3071 | } |
3072 | /* Paranoia. */ | |
3073 | if (count != last_rec - first_rec + 1) | |
3074 | return ERR_PTR(-EINVAL); | |
8e09f215 SW |
3075 | |
3076 | /* use the prefix command if available */ | |
3077 | use_prefix = private->features.feature[8] & 0x01; | |
3078 | if (use_prefix) { | |
3079 | /* 1x prefix + number of blocks */ | |
3080 | cplength = 2 + count; | |
3081 | /* 1x prefix + cidaws*sizeof(long) */ | |
3082 | datasize = sizeof(struct PFX_eckd_data) + | |
3083 | sizeof(struct LO_eckd_data) + | |
3084 | cidaw * sizeof(unsigned long); | |
3085 | } else { | |
3086 | /* 1x define extent + 1x locate record + number of blocks */ | |
3087 | cplength = 2 + count; | |
3088 | /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ | |
3089 | datasize = sizeof(struct DE_eckd_data) + | |
3090 | sizeof(struct LO_eckd_data) + | |
3091 | cidaw * sizeof(unsigned long); | |
3092 | } | |
1da177e4 LT |
3093 | /* Find out the number of additional locate record ccws for cdl. */ |
3094 | if (private->uses_cdl && first_rec < 2*blk_per_trk) { | |
3095 | if (last_rec >= 2*blk_per_trk) | |
3096 | count = 2*blk_per_trk - first_rec; | |
3097 | cplength += count; | |
3098 | datasize += count*sizeof(struct LO_eckd_data); | |
3099 | } | |
3100 | /* Allocate the ccw request. */ | |
68b781fe SH |
3101 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, |
3102 | startdev); | |
1da177e4 LT |
3103 | if (IS_ERR(cqr)) |
3104 | return cqr; | |
3105 | ccw = cqr->cpaddr; | |
8e09f215 SW |
3106 | /* First ccw is define extent or prefix. */ |
3107 | if (use_prefix) { | |
3108 | if (prefix(ccw++, cqr->data, first_trk, | |
3109 | last_trk, cmd, basedev, startdev) == -EAGAIN) { | |
3110 | /* Clock not in sync and XRC is enabled. | |
3111 | * Try again later. | |
3112 | */ | |
3113 | dasd_sfree_request(cqr, startdev); | |
3114 | return ERR_PTR(-EAGAIN); | |
3115 | } | |
3116 | idaws = (unsigned long *) (cqr->data + | |
3117 | sizeof(struct PFX_eckd_data)); | |
3118 | } else { | |
3119 | if (define_extent(ccw++, cqr->data, first_trk, | |
45f186be | 3120 | last_trk, cmd, basedev, 0) == -EAGAIN) { |
8e09f215 SW |
3121 | /* Clock not in sync and XRC is enabled. |
3122 | * Try again later. | |
3123 | */ | |
3124 | dasd_sfree_request(cqr, startdev); | |
3125 | return ERR_PTR(-EAGAIN); | |
3126 | } | |
3127 | idaws = (unsigned long *) (cqr->data + | |
3128 | sizeof(struct DE_eckd_data)); | |
d54853ef | 3129 | } |
1da177e4 | 3130 | /* Build locate_record+read/write/ccws. */ |
1da177e4 LT |
3131 | LO_data = (struct LO_eckd_data *) (idaws + cidaw); |
3132 | recid = first_rec; | |
3133 | if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { | |
3134 | /* Only standard blocks so there is just one locate record. */ | |
3135 | ccw[-1].flags |= CCW_FLAG_CC; | |
3136 | locate_record(ccw++, LO_data++, first_trk, first_offs + 1, | |
8e09f215 | 3137 | last_rec - recid + 1, cmd, basedev, blksize); |
1da177e4 | 3138 | } |
5705f702 | 3139 | rq_for_each_segment(bv, req, iter) { |
7988613b | 3140 | dst = page_address(bv.bv_page) + bv.bv_offset; |
1da177e4 LT |
3141 | if (dasd_page_cache) { |
3142 | char *copy = kmem_cache_alloc(dasd_page_cache, | |
441e143e | 3143 | GFP_DMA | __GFP_NOWARN); |
1da177e4 | 3144 | if (copy && rq_data_dir(req) == WRITE) |
7988613b | 3145 | memcpy(copy + bv.bv_offset, dst, bv.bv_len); |
1da177e4 | 3146 | if (copy) |
7988613b | 3147 | dst = copy + bv.bv_offset; |
1da177e4 | 3148 | } |
7988613b | 3149 | for (off = 0; off < bv.bv_len; off += blksize) { |
1da177e4 LT |
3150 | sector_t trkid = recid; |
3151 | unsigned int recoffs = sector_div(trkid, blk_per_trk); | |
3152 | rcmd = cmd; | |
3153 | count = blksize; | |
3154 | /* Locate record for cdl special block ? */ | |
3155 | if (private->uses_cdl && recid < 2*blk_per_trk) { | |
3156 | if (dasd_eckd_cdl_special(blk_per_trk, recid)){ | |
3157 | rcmd |= 0x8; | |
3158 | count = dasd_eckd_cdl_reclen(recid); | |
ec5883ab HH |
3159 | if (count < blksize && |
3160 | rq_data_dir(req) == READ) | |
1da177e4 LT |
3161 | memset(dst + count, 0xe5, |
3162 | blksize - count); | |
3163 | } | |
3164 | ccw[-1].flags |= CCW_FLAG_CC; | |
3165 | locate_record(ccw++, LO_data++, | |
3166 | trkid, recoffs + 1, | |
8e09f215 | 3167 | 1, rcmd, basedev, count); |
1da177e4 LT |
3168 | } |
3169 | /* Locate record for standard blocks ? */ | |
3170 | if (private->uses_cdl && recid == 2*blk_per_trk) { | |
3171 | ccw[-1].flags |= CCW_FLAG_CC; | |
3172 | locate_record(ccw++, LO_data++, | |
3173 | trkid, recoffs + 1, | |
3174 | last_rec - recid + 1, | |
8e09f215 | 3175 | cmd, basedev, count); |
1da177e4 LT |
3176 | } |
3177 | /* Read/write ccw. */ | |
3178 | ccw[-1].flags |= CCW_FLAG_CC; | |
3179 | ccw->cmd_code = rcmd; | |
3180 | ccw->count = count; | |
3181 | if (idal_is_needed(dst, blksize)) { | |
3182 | ccw->cda = (__u32)(addr_t) idaws; | |
3183 | ccw->flags = CCW_FLAG_IDA; | |
3184 | idaws = idal_create_words(idaws, dst, blksize); | |
3185 | } else { | |
3186 | ccw->cda = (__u32)(addr_t) dst; | |
3187 | ccw->flags = 0; | |
3188 | } | |
3189 | ccw++; | |
3190 | dst += blksize; | |
3191 | recid++; | |
3192 | } | |
3193 | } | |
13de227b HS |
3194 | if (blk_noretry_request(req) || |
3195 | block->base->features & DASD_FEATURE_FAILFAST) | |
1c01b8a5 | 3196 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
8e09f215 SW |
3197 | cqr->startdev = startdev; |
3198 | cqr->memdev = startdev; | |
3199 | cqr->block = block; | |
7c8faa86 | 3200 | cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ |
c9346151 | 3201 | cqr->lpm = dasd_path_get_ppm(startdev); |
1f1ee9ad | 3202 | cqr->retries = startdev->default_retries; |
1aae0560 | 3203 | cqr->buildclk = get_tod_clock(); |
1da177e4 LT |
3204 | cqr->status = DASD_CQR_FILLED; |
3205 | return cqr; | |
3206 | } | |
3207 | ||
f3eb5384 SW |
3208 | static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( |
3209 | struct dasd_device *startdev, | |
3210 | struct dasd_block *block, | |
3211 | struct request *req, | |
3212 | sector_t first_rec, | |
3213 | sector_t last_rec, | |
3214 | sector_t first_trk, | |
3215 | sector_t last_trk, | |
3216 | unsigned int first_offs, | |
3217 | unsigned int last_offs, | |
3218 | unsigned int blk_per_trk, | |
3219 | unsigned int blksize) | |
3220 | { | |
f3eb5384 SW |
3221 | unsigned long *idaws; |
3222 | struct dasd_ccw_req *cqr; | |
3223 | struct ccw1 *ccw; | |
3224 | struct req_iterator iter; | |
7988613b | 3225 | struct bio_vec bv; |
f3eb5384 SW |
3226 | char *dst, *idaw_dst; |
3227 | unsigned int cidaw, cplength, datasize; | |
3228 | unsigned int tlf; | |
3229 | sector_t recid; | |
3230 | unsigned char cmd; | |
3231 | struct dasd_device *basedev; | |
3232 | unsigned int trkcount, count, count_to_trk_end; | |
3233 | unsigned int idaw_len, seg_len, part_len, len_to_track_end; | |
3234 | unsigned char new_track, end_idaw; | |
3235 | sector_t trkid; | |
3236 | unsigned int recoffs; | |
3237 | ||
3238 | basedev = block->base; | |
f3eb5384 SW |
3239 | if (rq_data_dir(req) == READ) |
3240 | cmd = DASD_ECKD_CCW_READ_TRACK_DATA; | |
3241 | else if (rq_data_dir(req) == WRITE) | |
3242 | cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; | |
3243 | else | |
3244 | return ERR_PTR(-EINVAL); | |
3245 | ||
3246 | /* Track based I/O needs IDAWs for each page, and not just for | |
3247 | * 64 bit addresses. We need additional idals for pages | |
3248 | * that get filled from two tracks, so we use the number | |
3249 | * of records as upper limit. | |
3250 | */ | |
3251 | cidaw = last_rec - first_rec + 1; | |
3252 | trkcount = last_trk - first_trk + 1; | |
3253 | ||
3254 | /* 1x prefix + one read/write ccw per track */ | |
3255 | cplength = 1 + trkcount; | |
3256 | ||
3257 | /* on 31-bit we need space for two 32 bit addresses per page | |
3258 | * on 64-bit one 64 bit address | |
3259 | */ | |
3260 | datasize = sizeof(struct PFX_eckd_data) + | |
3261 | cidaw * sizeof(unsigned long long); | |
3262 | ||
3263 | /* Allocate the ccw request. */ | |
68b781fe SH |
3264 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, |
3265 | startdev); | |
f3eb5384 SW |
3266 | if (IS_ERR(cqr)) |
3267 | return cqr; | |
3268 | ccw = cqr->cpaddr; | |
3269 | /* transfer length factor: how many bytes to read from the last track */ | |
3270 | if (first_trk == last_trk) | |
3271 | tlf = last_offs - first_offs + 1; | |
3272 | else | |
3273 | tlf = last_offs + 1; | |
3274 | tlf *= blksize; | |
3275 | ||
3276 | if (prefix_LRE(ccw++, cqr->data, first_trk, | |
3277 | last_trk, cmd, basedev, startdev, | |
3278 | 1 /* format */, first_offs + 1, | |
3279 | trkcount, blksize, | |
3280 | tlf) == -EAGAIN) { | |
3281 | /* Clock not in sync and XRC is enabled. | |
3282 | * Try again later. | |
3283 | */ | |
3284 | dasd_sfree_request(cqr, startdev); | |
3285 | return ERR_PTR(-EAGAIN); | |
3286 | } | |
3287 | ||
3288 | /* | |
3289 | * The translation of request into ccw programs must meet the | |
3290 | * following conditions: | |
3291 | * - all idaws but the first and the last must address full pages | |
3292 | * (or 2K blocks on 31-bit) | |
3293 | * - the scope of a ccw and it's idal ends with the track boundaries | |
3294 | */ | |
3295 | idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); | |
3296 | recid = first_rec; | |
3297 | new_track = 1; | |
3298 | end_idaw = 0; | |
3299 | len_to_track_end = 0; | |
246ccea1 | 3300 | idaw_dst = NULL; |
f3eb5384 SW |
3301 | idaw_len = 0; |
3302 | rq_for_each_segment(bv, req, iter) { | |
7988613b KO |
3303 | dst = page_address(bv.bv_page) + bv.bv_offset; |
3304 | seg_len = bv.bv_len; | |
f3eb5384 SW |
3305 | while (seg_len) { |
3306 | if (new_track) { | |
3307 | trkid = recid; | |
3308 | recoffs = sector_div(trkid, blk_per_trk); | |
3309 | count_to_trk_end = blk_per_trk - recoffs; | |
3310 | count = min((last_rec - recid + 1), | |
3311 | (sector_t)count_to_trk_end); | |
3312 | len_to_track_end = count * blksize; | |
3313 | ccw[-1].flags |= CCW_FLAG_CC; | |
3314 | ccw->cmd_code = cmd; | |
3315 | ccw->count = len_to_track_end; | |
3316 | ccw->cda = (__u32)(addr_t)idaws; | |
3317 | ccw->flags = CCW_FLAG_IDA; | |
3318 | ccw++; | |
3319 | recid += count; | |
3320 | new_track = 0; | |
52db45c3 SW |
3321 | /* first idaw for a ccw may start anywhere */ |
3322 | if (!idaw_dst) | |
3323 | idaw_dst = dst; | |
f3eb5384 | 3324 | } |
52db45c3 SW |
3325 | /* If we start a new idaw, we must make sure that it |
3326 | * starts on an IDA_BLOCK_SIZE boundary. | |
f3eb5384 SW |
3327 | * If we continue an idaw, we must make sure that the |
3328 | * current segment begins where the so far accumulated | |
3329 | * idaw ends | |
3330 | */ | |
52db45c3 SW |
3331 | if (!idaw_dst) { |
3332 | if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { | |
3333 | dasd_sfree_request(cqr, startdev); | |
3334 | return ERR_PTR(-ERANGE); | |
3335 | } else | |
3336 | idaw_dst = dst; | |
3337 | } | |
f3eb5384 SW |
3338 | if ((idaw_dst + idaw_len) != dst) { |
3339 | dasd_sfree_request(cqr, startdev); | |
3340 | return ERR_PTR(-ERANGE); | |
3341 | } | |
3342 | part_len = min(seg_len, len_to_track_end); | |
3343 | seg_len -= part_len; | |
3344 | dst += part_len; | |
3345 | idaw_len += part_len; | |
3346 | len_to_track_end -= part_len; | |
3347 | /* collected memory area ends on an IDA_BLOCK border, | |
3348 | * -> create an idaw | |
3349 | * idal_create_words will handle cases where idaw_len | |
3350 | * is larger then IDA_BLOCK_SIZE | |
3351 | */ | |
3352 | if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) | |
3353 | end_idaw = 1; | |
3354 | /* We also need to end the idaw at track end */ | |
3355 | if (!len_to_track_end) { | |
3356 | new_track = 1; | |
3357 | end_idaw = 1; | |
3358 | } | |
3359 | if (end_idaw) { | |
3360 | idaws = idal_create_words(idaws, idaw_dst, | |
3361 | idaw_len); | |
246ccea1 | 3362 | idaw_dst = NULL; |
f3eb5384 SW |
3363 | idaw_len = 0; |
3364 | end_idaw = 0; | |
3365 | } | |
3366 | } | |
3367 | } | |
3368 | ||
3369 | if (blk_noretry_request(req) || | |
3370 | block->base->features & DASD_FEATURE_FAILFAST) | |
3371 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); | |
3372 | cqr->startdev = startdev; | |
3373 | cqr->memdev = startdev; | |
3374 | cqr->block = block; | |
7c8faa86 | 3375 | cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ |
c9346151 | 3376 | cqr->lpm = dasd_path_get_ppm(startdev); |
1f1ee9ad | 3377 | cqr->retries = startdev->default_retries; |
1aae0560 | 3378 | cqr->buildclk = get_tod_clock(); |
f3eb5384 SW |
3379 | cqr->status = DASD_CQR_FILLED; |
3380 | return cqr; | |
3381 | } | |
3382 | ||
3383 | static int prepare_itcw(struct itcw *itcw, | |
3384 | unsigned int trk, unsigned int totrk, int cmd, | |
3385 | struct dasd_device *basedev, | |
3386 | struct dasd_device *startdev, | |
3387 | unsigned int rec_on_trk, int count, | |
3388 | unsigned int blksize, | |
3389 | unsigned int total_data_size, | |
3390 | unsigned int tlf, | |
3391 | unsigned int blk_per_trk) | |
3392 | { | |
3393 | struct PFX_eckd_data pfxdata; | |
3394 | struct dasd_eckd_private *basepriv, *startpriv; | |
3395 | struct DE_eckd_data *dedata; | |
3396 | struct LRE_eckd_data *lredata; | |
3397 | struct dcw *dcw; | |
3398 | ||
3399 | u32 begcyl, endcyl; | |
3400 | u16 heads, beghead, endhead; | |
3401 | u8 pfx_cmd; | |
3402 | ||
3403 | int rc = 0; | |
3404 | int sector = 0; | |
3405 | int dn, d; | |
3406 | ||
3407 | ||
3408 | /* setup prefix data */ | |
543691a4 SO |
3409 | basepriv = basedev->private; |
3410 | startpriv = startdev->private; | |
f3eb5384 SW |
3411 | dedata = &pfxdata.define_extent; |
3412 | lredata = &pfxdata.locate_record; | |
3413 | ||
3414 | memset(&pfxdata, 0, sizeof(pfxdata)); | |
3415 | pfxdata.format = 1; /* PFX with LRE */ | |
3416 | pfxdata.base_address = basepriv->ned->unit_addr; | |
3417 | pfxdata.base_lss = basepriv->ned->ID; | |
3418 | pfxdata.validity.define_extent = 1; | |
3419 | ||
3420 | /* private uid is kept up to date, conf_data may be outdated */ | |
3421 | if (startpriv->uid.type != UA_BASE_DEVICE) { | |
3422 | pfxdata.validity.verify_base = 1; | |
3423 | if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) | |
3424 | pfxdata.validity.hyper_pav = 1; | |
3425 | } | |
3426 | ||
3427 | switch (cmd) { | |
3428 | case DASD_ECKD_CCW_READ_TRACK_DATA: | |
3429 | dedata->mask.perm = 0x1; | |
3430 | dedata->attributes.operation = basepriv->attrib.operation; | |
3431 | dedata->blk_size = blksize; | |
3432 | dedata->ga_extended |= 0x42; | |
3433 | lredata->operation.orientation = 0x0; | |
3434 | lredata->operation.operation = 0x0C; | |
3435 | lredata->auxiliary.check_bytes = 0x01; | |
3436 | pfx_cmd = DASD_ECKD_CCW_PFX_READ; | |
3437 | break; | |
3438 | case DASD_ECKD_CCW_WRITE_TRACK_DATA: | |
3439 | dedata->mask.perm = 0x02; | |
3440 | dedata->attributes.operation = basepriv->attrib.operation; | |
3441 | dedata->blk_size = blksize; | |
45f186be | 3442 | rc = check_XRC(NULL, dedata, basedev); |
f3eb5384 SW |
3443 | dedata->ga_extended |= 0x42; |
3444 | lredata->operation.orientation = 0x0; | |
3445 | lredata->operation.operation = 0x3F; | |
3446 | lredata->extended_operation = 0x23; | |
3447 | lredata->auxiliary.check_bytes = 0x2; | |
45f186be JH |
3448 | /* |
3449 | * If XRC is supported the System Time Stamp is set. The | |
3450 | * validity of the time stamp must be reflected in the prefix | |
3451 | * data as well. | |
3452 | */ | |
3453 | if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02) | |
3454 | pfxdata.validity.time_stamp = 1; /* 'Time Stamp Valid' */ | |
f3eb5384 SW |
3455 | pfx_cmd = DASD_ECKD_CCW_PFX; |
3456 | break; | |
8fd57520 JH |
3457 | case DASD_ECKD_CCW_READ_COUNT_MT: |
3458 | dedata->mask.perm = 0x1; | |
3459 | dedata->attributes.operation = DASD_BYPASS_CACHE; | |
3460 | dedata->ga_extended |= 0x42; | |
3461 | dedata->blk_size = blksize; | |
3462 | lredata->operation.orientation = 0x2; | |
3463 | lredata->operation.operation = 0x16; | |
3464 | lredata->auxiliary.check_bytes = 0x01; | |
3465 | pfx_cmd = DASD_ECKD_CCW_PFX_READ; | |
3466 | break; | |
f3eb5384 SW |
3467 | default: |
3468 | DBF_DEV_EVENT(DBF_ERR, basedev, | |
3469 | "prepare itcw, unknown opcode 0x%x", cmd); | |
3470 | BUG(); | |
3471 | break; | |
3472 | } | |
3473 | if (rc) | |
3474 | return rc; | |
3475 | ||
3476 | dedata->attributes.mode = 0x3; /* ECKD */ | |
3477 | ||
3478 | heads = basepriv->rdc_data.trk_per_cyl; | |
3479 | begcyl = trk / heads; | |
3480 | beghead = trk % heads; | |
3481 | endcyl = totrk / heads; | |
3482 | endhead = totrk % heads; | |
3483 | ||
3484 | /* check for sequential prestage - enhance cylinder range */ | |
3485 | if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || | |
3486 | dedata->attributes.operation == DASD_SEQ_ACCESS) { | |
3487 | ||
3488 | if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) | |
3489 | endcyl += basepriv->attrib.nr_cyl; | |
3490 | else | |
3491 | endcyl = (basepriv->real_cyl - 1); | |
3492 | } | |
3493 | ||
3494 | set_ch_t(&dedata->beg_ext, begcyl, beghead); | |
3495 | set_ch_t(&dedata->end_ext, endcyl, endhead); | |
3496 | ||
3497 | dedata->ep_format = 0x20; /* records per track is valid */ | |
3498 | dedata->ep_rec_per_track = blk_per_trk; | |
3499 | ||
3500 | if (rec_on_trk) { | |
3501 | switch (basepriv->rdc_data.dev_type) { | |
3502 | case 0x3390: | |
3503 | dn = ceil_quot(blksize + 6, 232); | |
3504 | d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); | |
3505 | sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; | |
3506 | break; | |
3507 | case 0x3380: | |
3508 | d = 7 + ceil_quot(blksize + 12, 32); | |
3509 | sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; | |
3510 | break; | |
3511 | } | |
3512 | } | |
3513 | ||
8fd57520 JH |
3514 | if (cmd == DASD_ECKD_CCW_READ_COUNT_MT) { |
3515 | lredata->auxiliary.length_valid = 0; | |
3516 | lredata->auxiliary.length_scope = 0; | |
3517 | lredata->sector = 0xff; | |
3518 | } else { | |
3519 | lredata->auxiliary.length_valid = 1; | |
3520 | lredata->auxiliary.length_scope = 1; | |
3521 | lredata->sector = sector; | |
3522 | } | |
f3eb5384 SW |
3523 | lredata->auxiliary.imbedded_ccw_valid = 1; |
3524 | lredata->length = tlf; | |
3525 | lredata->imbedded_ccw = cmd; | |
3526 | lredata->count = count; | |
f3eb5384 SW |
3527 | set_ch_t(&lredata->seek_addr, begcyl, beghead); |
3528 | lredata->search_arg.cyl = lredata->seek_addr.cyl; | |
3529 | lredata->search_arg.head = lredata->seek_addr.head; | |
3530 | lredata->search_arg.record = rec_on_trk; | |
3531 | ||
3532 | dcw = itcw_add_dcw(itcw, pfx_cmd, 0, | |
3533 | &pfxdata, sizeof(pfxdata), total_data_size); | |
82a7b955 | 3534 | return PTR_RET(dcw); |
f3eb5384 SW |
3535 | } |
3536 | ||
3537 | static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( | |
3538 | struct dasd_device *startdev, | |
3539 | struct dasd_block *block, | |
3540 | struct request *req, | |
3541 | sector_t first_rec, | |
3542 | sector_t last_rec, | |
3543 | sector_t first_trk, | |
3544 | sector_t last_trk, | |
3545 | unsigned int first_offs, | |
3546 | unsigned int last_offs, | |
3547 | unsigned int blk_per_trk, | |
3548 | unsigned int blksize) | |
3549 | { | |
f3eb5384 SW |
3550 | struct dasd_ccw_req *cqr; |
3551 | struct req_iterator iter; | |
7988613b | 3552 | struct bio_vec bv; |
f3eb5384 SW |
3553 | char *dst; |
3554 | unsigned int trkcount, ctidaw; | |
3555 | unsigned char cmd; | |
3556 | struct dasd_device *basedev; | |
3557 | unsigned int tlf; | |
3558 | struct itcw *itcw; | |
3559 | struct tidaw *last_tidaw = NULL; | |
3560 | int itcw_op; | |
3561 | size_t itcw_size; | |
ef19298b SW |
3562 | u8 tidaw_flags; |
3563 | unsigned int seg_len, part_len, len_to_track_end; | |
3564 | unsigned char new_track; | |
3565 | sector_t recid, trkid; | |
3566 | unsigned int offs; | |
3567 | unsigned int count, count_to_trk_end; | |
cd10502b | 3568 | int ret; |
f3eb5384 SW |
3569 | |
3570 | basedev = block->base; | |
f3eb5384 SW |
3571 | if (rq_data_dir(req) == READ) { |
3572 | cmd = DASD_ECKD_CCW_READ_TRACK_DATA; | |
3573 | itcw_op = ITCW_OP_READ; | |
3574 | } else if (rq_data_dir(req) == WRITE) { | |
3575 | cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; | |
3576 | itcw_op = ITCW_OP_WRITE; | |
3577 | } else | |
3578 | return ERR_PTR(-EINVAL); | |
3579 | ||
3580 | /* trackbased I/O needs address all memory via TIDAWs, | |
3581 | * not just for 64 bit addresses. This allows us to map | |
3582 | * each segment directly to one tidaw. | |
ef19298b SW |
3583 | * In the case of write requests, additional tidaws may |
3584 | * be needed when a segment crosses a track boundary. | |
f3eb5384 SW |
3585 | */ |
3586 | trkcount = last_trk - first_trk + 1; | |
3587 | ctidaw = 0; | |
3588 | rq_for_each_segment(bv, req, iter) { | |
3589 | ++ctidaw; | |
3590 | } | |
ef19298b SW |
3591 | if (rq_data_dir(req) == WRITE) |
3592 | ctidaw += (last_trk - first_trk); | |
f3eb5384 SW |
3593 | |
3594 | /* Allocate the ccw request. */ | |
3595 | itcw_size = itcw_calc_size(0, ctidaw, 0); | |
68b781fe | 3596 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); |
f3eb5384 SW |
3597 | if (IS_ERR(cqr)) |
3598 | return cqr; | |
3599 | ||
f3eb5384 SW |
3600 | /* transfer length factor: how many bytes to read from the last track */ |
3601 | if (first_trk == last_trk) | |
3602 | tlf = last_offs - first_offs + 1; | |
3603 | else | |
3604 | tlf = last_offs + 1; | |
3605 | tlf *= blksize; | |
3606 | ||
3607 | itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); | |
ef19298b | 3608 | if (IS_ERR(itcw)) { |
cd10502b JL |
3609 | ret = -EINVAL; |
3610 | goto out_error; | |
ef19298b | 3611 | } |
f3eb5384 | 3612 | cqr->cpaddr = itcw_get_tcw(itcw); |
f3eb5384 SW |
3613 | if (prepare_itcw(itcw, first_trk, last_trk, |
3614 | cmd, basedev, startdev, | |
3615 | first_offs + 1, | |
3616 | trkcount, blksize, | |
3617 | (last_rec - first_rec + 1) * blksize, | |
3618 | tlf, blk_per_trk) == -EAGAIN) { | |
3619 | /* Clock not in sync and XRC is enabled. | |
3620 | * Try again later. | |
3621 | */ | |
cd10502b JL |
3622 | ret = -EAGAIN; |
3623 | goto out_error; | |
f3eb5384 | 3624 | } |
d54cddb6 | 3625 | len_to_track_end = 0; |
f3eb5384 SW |
3626 | /* |
3627 | * A tidaw can address 4k of memory, but must not cross page boundaries | |
3628 | * We can let the block layer handle this by setting | |
3629 | * blk_queue_segment_boundary to page boundaries and | |
3630 | * blk_max_segment_size to page size when setting up the request queue. | |
ef19298b SW |
3631 | * For write requests, a TIDAW must not cross track boundaries, because |
3632 | * we have to set the CBC flag on the last tidaw for each track. | |
f3eb5384 | 3633 | */ |
ef19298b SW |
3634 | if (rq_data_dir(req) == WRITE) { |
3635 | new_track = 1; | |
3636 | recid = first_rec; | |
3637 | rq_for_each_segment(bv, req, iter) { | |
7988613b KO |
3638 | dst = page_address(bv.bv_page) + bv.bv_offset; |
3639 | seg_len = bv.bv_len; | |
ef19298b SW |
3640 | while (seg_len) { |
3641 | if (new_track) { | |
3642 | trkid = recid; | |
3643 | offs = sector_div(trkid, blk_per_trk); | |
3644 | count_to_trk_end = blk_per_trk - offs; | |
3645 | count = min((last_rec - recid + 1), | |
3646 | (sector_t)count_to_trk_end); | |
3647 | len_to_track_end = count * blksize; | |
3648 | recid += count; | |
3649 | new_track = 0; | |
3650 | } | |
3651 | part_len = min(seg_len, len_to_track_end); | |
3652 | seg_len -= part_len; | |
3653 | len_to_track_end -= part_len; | |
3654 | /* We need to end the tidaw at track end */ | |
3655 | if (!len_to_track_end) { | |
3656 | new_track = 1; | |
3657 | tidaw_flags = TIDAW_FLAGS_INSERT_CBC; | |
3658 | } else | |
3659 | tidaw_flags = 0; | |
3660 | last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, | |
3661 | dst, part_len); | |
cd10502b JL |
3662 | if (IS_ERR(last_tidaw)) { |
3663 | ret = -EINVAL; | |
3664 | goto out_error; | |
3665 | } | |
ef19298b SW |
3666 | dst += part_len; |
3667 | } | |
3668 | } | |
3669 | } else { | |
3670 | rq_for_each_segment(bv, req, iter) { | |
7988613b | 3671 | dst = page_address(bv.bv_page) + bv.bv_offset; |
ef19298b | 3672 | last_tidaw = itcw_add_tidaw(itcw, 0x00, |
7988613b | 3673 | dst, bv.bv_len); |
cd10502b JL |
3674 | if (IS_ERR(last_tidaw)) { |
3675 | ret = -EINVAL; | |
3676 | goto out_error; | |
3677 | } | |
ef19298b | 3678 | } |
f3eb5384 | 3679 | } |
ef19298b SW |
3680 | last_tidaw->flags |= TIDAW_FLAGS_LAST; |
3681 | last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; | |
f3eb5384 SW |
3682 | itcw_finalize(itcw); |
3683 | ||
3684 | if (blk_noretry_request(req) || | |
3685 | block->base->features & DASD_FEATURE_FAILFAST) | |
3686 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); | |
ef19298b | 3687 | cqr->cpmode = 1; |
f3eb5384 SW |
3688 | cqr->startdev = startdev; |
3689 | cqr->memdev = startdev; | |
3690 | cqr->block = block; | |
7c8faa86 | 3691 | cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ |
c9346151 | 3692 | cqr->lpm = dasd_path_get_ppm(startdev); |
1f1ee9ad | 3693 | cqr->retries = startdev->default_retries; |
1aae0560 | 3694 | cqr->buildclk = get_tod_clock(); |
f3eb5384 SW |
3695 | cqr->status = DASD_CQR_FILLED; |
3696 | return cqr; | |
cd10502b JL |
3697 | out_error: |
3698 | dasd_sfree_request(cqr, startdev); | |
3699 | return ERR_PTR(ret); | |
f3eb5384 SW |
3700 | } |
3701 | ||
3702 | static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, | |
3703 | struct dasd_block *block, | |
3704 | struct request *req) | |
3705 | { | |
ef19298b | 3706 | int cmdrtd, cmdwtd; |
f3eb5384 | 3707 | int use_prefix; |
ef19298b | 3708 | int fcx_multitrack; |
45b44d76 | 3709 | struct dasd_eckd_private *private; |
f3eb5384 SW |
3710 | struct dasd_device *basedev; |
3711 | sector_t first_rec, last_rec; | |
3712 | sector_t first_trk, last_trk; | |
3713 | unsigned int first_offs, last_offs; | |
3714 | unsigned int blk_per_trk, blksize; | |
3715 | int cdlspecial; | |
ef19298b | 3716 | unsigned int data_size; |
f3eb5384 SW |
3717 | struct dasd_ccw_req *cqr; |
3718 | ||
3719 | basedev = block->base; | |
543691a4 | 3720 | private = basedev->private; |
f3eb5384 SW |
3721 | |
3722 | /* Calculate number of blocks/records per track. */ | |
3723 | blksize = block->bp_block; | |
3724 | blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); | |
6fca97a9 SH |
3725 | if (blk_per_trk == 0) |
3726 | return ERR_PTR(-EINVAL); | |
f3eb5384 | 3727 | /* Calculate record id of first and last block. */ |
83096ebf | 3728 | first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; |
f3eb5384 SW |
3729 | first_offs = sector_div(first_trk, blk_per_trk); |
3730 | last_rec = last_trk = | |
83096ebf | 3731 | (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; |
f3eb5384 SW |
3732 | last_offs = sector_div(last_trk, blk_per_trk); |
3733 | cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); | |
3734 | ||
ef19298b SW |
3735 | fcx_multitrack = private->features.feature[40] & 0x20; |
3736 | data_size = blk_rq_bytes(req); | |
26a35f37 SW |
3737 | if (data_size % blksize) |
3738 | return ERR_PTR(-EINVAL); | |
ef19298b SW |
3739 | /* tpm write request add CBC data on each track boundary */ |
3740 | if (rq_data_dir(req) == WRITE) | |
3741 | data_size += (last_trk - first_trk) * 4; | |
f3eb5384 SW |
3742 | |
3743 | /* is read track data and write track data in command mode supported? */ | |
3744 | cmdrtd = private->features.feature[9] & 0x20; | |
3745 | cmdwtd = private->features.feature[12] & 0x40; | |
3746 | use_prefix = private->features.feature[8] & 0x01; | |
3747 | ||
3748 | cqr = NULL; | |
3749 | if (cdlspecial || dasd_page_cache) { | |
3750 | /* do nothing, just fall through to the cmd mode single case */ | |
ef19298b SW |
3751 | } else if ((data_size <= private->fcx_max_data) |
3752 | && (fcx_multitrack || (first_trk == last_trk))) { | |
f3eb5384 SW |
3753 | cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, |
3754 | first_rec, last_rec, | |
3755 | first_trk, last_trk, | |
3756 | first_offs, last_offs, | |
3757 | blk_per_trk, blksize); | |
ef19298b SW |
3758 | if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && |
3759 | (PTR_ERR(cqr) != -ENOMEM)) | |
f3eb5384 SW |
3760 | cqr = NULL; |
3761 | } else if (use_prefix && | |
3762 | (((rq_data_dir(req) == READ) && cmdrtd) || | |
3763 | ((rq_data_dir(req) == WRITE) && cmdwtd))) { | |
3764 | cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, | |
3765 | first_rec, last_rec, | |
3766 | first_trk, last_trk, | |
3767 | first_offs, last_offs, | |
3768 | blk_per_trk, blksize); | |
ef19298b SW |
3769 | if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && |
3770 | (PTR_ERR(cqr) != -ENOMEM)) | |
f3eb5384 SW |
3771 | cqr = NULL; |
3772 | } | |
3773 | if (!cqr) | |
3774 | cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, | |
3775 | first_rec, last_rec, | |
3776 | first_trk, last_trk, | |
3777 | first_offs, last_offs, | |
3778 | blk_per_trk, blksize); | |
3779 | return cqr; | |
3780 | } | |
3781 | ||
bbc7f7ea JH |
3782 | static struct dasd_ccw_req *dasd_eckd_build_cp_raw(struct dasd_device *startdev, |
3783 | struct dasd_block *block, | |
3784 | struct request *req) | |
e4dbb0f2 | 3785 | { |
9d2be0c1 JH |
3786 | sector_t start_padding_sectors, end_sector_offset, end_padding_sectors; |
3787 | unsigned int seg_len, len_to_track_end; | |
3788 | unsigned int cidaw, cplength, datasize; | |
3789 | sector_t first_trk, last_trk, sectors; | |
3790 | struct dasd_eckd_private *base_priv; | |
e4dbb0f2 | 3791 | struct dasd_device *basedev; |
e4dbb0f2 | 3792 | struct req_iterator iter; |
9d2be0c1 JH |
3793 | struct dasd_ccw_req *cqr; |
3794 | unsigned int first_offs; | |
3795 | unsigned int trkcount; | |
3796 | unsigned long *idaws; | |
3797 | unsigned int size; | |
3798 | unsigned char cmd; | |
7988613b | 3799 | struct bio_vec bv; |
9d2be0c1 JH |
3800 | struct ccw1 *ccw; |
3801 | int use_prefix; | |
3802 | void *data; | |
e4dbb0f2 | 3803 | char *dst; |
e4dbb0f2 SH |
3804 | |
3805 | /* | |
3806 | * raw track access needs to be mutiple of 64k and on 64k boundary | |
558b9ef0 SW |
3807 | * For read requests we can fix an incorrect alignment by padding |
3808 | * the request with dummy pages. | |
e4dbb0f2 | 3809 | */ |
558b9ef0 SW |
3810 | start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK; |
3811 | end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) % | |
3812 | DASD_RAW_SECTORS_PER_TRACK; | |
3813 | end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) % | |
3814 | DASD_RAW_SECTORS_PER_TRACK; | |
3815 | basedev = block->base; | |
3816 | if ((start_padding_sectors || end_padding_sectors) && | |
3817 | (rq_data_dir(req) == WRITE)) { | |
3818 | DBF_DEV_EVENT(DBF_ERR, basedev, | |
3819 | "raw write not track aligned (%lu,%lu) req %p", | |
3820 | start_padding_sectors, end_padding_sectors, req); | |
9d2be0c1 | 3821 | return ERR_PTR(-EINVAL); |
e4dbb0f2 SH |
3822 | } |
3823 | ||
3824 | first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; | |
3825 | last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / | |
3826 | DASD_RAW_SECTORS_PER_TRACK; | |
3827 | trkcount = last_trk - first_trk + 1; | |
3828 | first_offs = 0; | |
e4dbb0f2 SH |
3829 | |
3830 | if (rq_data_dir(req) == READ) | |
3831 | cmd = DASD_ECKD_CCW_READ_TRACK; | |
3832 | else if (rq_data_dir(req) == WRITE) | |
3833 | cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; | |
9d2be0c1 JH |
3834 | else |
3835 | return ERR_PTR(-EINVAL); | |
e4dbb0f2 SH |
3836 | |
3837 | /* | |
3838 | * Raw track based I/O needs IDAWs for each page, | |
3839 | * and not just for 64 bit addresses. | |
3840 | */ | |
3841 | cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; | |
3842 | ||
e4dbb0f2 | 3843 | /* |
9d2be0c1 JH |
3844 | * struct PFX_eckd_data and struct LRE_eckd_data can have up to 2 bytes |
3845 | * of extended parameter. This is needed for write full track. | |
e4dbb0f2 | 3846 | */ |
9d2be0c1 JH |
3847 | base_priv = basedev->private; |
3848 | use_prefix = base_priv->features.feature[8] & 0x01; | |
3849 | if (use_prefix) { | |
3850 | cplength = 1 + trkcount; | |
3851 | size = sizeof(struct PFX_eckd_data) + 2; | |
3852 | } else { | |
3853 | cplength = 2 + trkcount; | |
3854 | size = sizeof(struct DE_eckd_data) + | |
3855 | sizeof(struct LRE_eckd_data) + 2; | |
3856 | } | |
3857 | size = ALIGN(size, 8); | |
e4dbb0f2 | 3858 | |
9d2be0c1 | 3859 | datasize = size + cidaw * sizeof(unsigned long long); |
e4dbb0f2 SH |
3860 | |
3861 | /* Allocate the ccw request. */ | |
3862 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, | |
3863 | datasize, startdev); | |
3864 | if (IS_ERR(cqr)) | |
9d2be0c1 JH |
3865 | return cqr; |
3866 | ||
e4dbb0f2 | 3867 | ccw = cqr->cpaddr; |
9d2be0c1 | 3868 | data = cqr->data; |
e4dbb0f2 | 3869 | |
9d2be0c1 JH |
3870 | if (use_prefix) { |
3871 | prefix_LRE(ccw++, data, first_trk, last_trk, cmd, basedev, | |
3872 | startdev, 1, first_offs + 1, trkcount, 0, 0); | |
3873 | } else { | |
3874 | define_extent(ccw++, data, first_trk, last_trk, cmd, basedev, 0); | |
3875 | ccw[-1].flags |= CCW_FLAG_CC; | |
3876 | ||
3877 | data += sizeof(struct DE_eckd_data); | |
3878 | locate_record_ext(ccw++, data, first_trk, first_offs + 1, | |
3879 | trkcount, cmd, basedev, 0, 0); | |
e4dbb0f2 SH |
3880 | } |
3881 | ||
9d2be0c1 | 3882 | idaws = (unsigned long *)(cqr->data + size); |
e4dbb0f2 | 3883 | len_to_track_end = 0; |
558b9ef0 SW |
3884 | if (start_padding_sectors) { |
3885 | ccw[-1].flags |= CCW_FLAG_CC; | |
3886 | ccw->cmd_code = cmd; | |
3887 | /* maximum 3390 track size */ | |
3888 | ccw->count = 57326; | |
3889 | /* 64k map to one track */ | |
3890 | len_to_track_end = 65536 - start_padding_sectors * 512; | |
3891 | ccw->cda = (__u32)(addr_t)idaws; | |
3892 | ccw->flags |= CCW_FLAG_IDA; | |
3893 | ccw->flags |= CCW_FLAG_SLI; | |
3894 | ccw++; | |
3895 | for (sectors = 0; sectors < start_padding_sectors; sectors += 8) | |
3896 | idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); | |
3897 | } | |
e4dbb0f2 | 3898 | rq_for_each_segment(bv, req, iter) { |
7988613b KO |
3899 | dst = page_address(bv.bv_page) + bv.bv_offset; |
3900 | seg_len = bv.bv_len; | |
558b9ef0 SW |
3901 | if (cmd == DASD_ECKD_CCW_READ_TRACK) |
3902 | memset(dst, 0, seg_len); | |
e4dbb0f2 SH |
3903 | if (!len_to_track_end) { |
3904 | ccw[-1].flags |= CCW_FLAG_CC; | |
3905 | ccw->cmd_code = cmd; | |
3906 | /* maximum 3390 track size */ | |
3907 | ccw->count = 57326; | |
3908 | /* 64k map to one track */ | |
3909 | len_to_track_end = 65536; | |
3910 | ccw->cda = (__u32)(addr_t)idaws; | |
3911 | ccw->flags |= CCW_FLAG_IDA; | |
3912 | ccw->flags |= CCW_FLAG_SLI; | |
3913 | ccw++; | |
3914 | } | |
3915 | len_to_track_end -= seg_len; | |
3916 | idaws = idal_create_words(idaws, dst, seg_len); | |
3917 | } | |
558b9ef0 SW |
3918 | for (sectors = 0; sectors < end_padding_sectors; sectors += 8) |
3919 | idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); | |
e4dbb0f2 SH |
3920 | if (blk_noretry_request(req) || |
3921 | block->base->features & DASD_FEATURE_FAILFAST) | |
3922 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); | |
3923 | cqr->startdev = startdev; | |
3924 | cqr->memdev = startdev; | |
3925 | cqr->block = block; | |
3926 | cqr->expires = startdev->default_expires * HZ; | |
c9346151 | 3927 | cqr->lpm = dasd_path_get_ppm(startdev); |
1f1ee9ad | 3928 | cqr->retries = startdev->default_retries; |
1aae0560 | 3929 | cqr->buildclk = get_tod_clock(); |
e4dbb0f2 SH |
3930 | cqr->status = DASD_CQR_FILLED; |
3931 | ||
e4dbb0f2 SH |
3932 | return cqr; |
3933 | } | |
3934 | ||
3935 | ||
1da177e4 LT |
3936 | static int |
3937 | dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) | |
3938 | { | |
3939 | struct dasd_eckd_private *private; | |
3940 | struct ccw1 *ccw; | |
5705f702 | 3941 | struct req_iterator iter; |
7988613b | 3942 | struct bio_vec bv; |
1da177e4 LT |
3943 | char *dst, *cda; |
3944 | unsigned int blksize, blk_per_trk, off; | |
3945 | sector_t recid; | |
5705f702 | 3946 | int status; |
1da177e4 LT |
3947 | |
3948 | if (!dasd_page_cache) | |
3949 | goto out; | |
543691a4 | 3950 | private = cqr->block->base->private; |
8e09f215 | 3951 | blksize = cqr->block->bp_block; |
1da177e4 | 3952 | blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); |
83096ebf | 3953 | recid = blk_rq_pos(req) >> cqr->block->s2b_shift; |
1da177e4 LT |
3954 | ccw = cqr->cpaddr; |
3955 | /* Skip over define extent & locate record. */ | |
3956 | ccw++; | |
3957 | if (private->uses_cdl == 0 || recid > 2*blk_per_trk) | |
3958 | ccw++; | |
5705f702 | 3959 | rq_for_each_segment(bv, req, iter) { |
7988613b KO |
3960 | dst = page_address(bv.bv_page) + bv.bv_offset; |
3961 | for (off = 0; off < bv.bv_len; off += blksize) { | |
1da177e4 LT |
3962 | /* Skip locate record. */ |
3963 | if (private->uses_cdl && recid <= 2*blk_per_trk) | |
3964 | ccw++; | |
3965 | if (dst) { | |
3966 | if (ccw->flags & CCW_FLAG_IDA) | |
3967 | cda = *((char **)((addr_t) ccw->cda)); | |
3968 | else | |
3969 | cda = (char *)((addr_t) ccw->cda); | |
3970 | if (dst != cda) { | |
3971 | if (rq_data_dir(req) == READ) | |
7988613b | 3972 | memcpy(dst, cda, bv.bv_len); |
1da177e4 LT |
3973 | kmem_cache_free(dasd_page_cache, |
3974 | (void *)((addr_t)cda & PAGE_MASK)); | |
3975 | } | |
3976 | dst = NULL; | |
3977 | } | |
3978 | ccw++; | |
3979 | recid++; | |
3980 | } | |
3981 | } | |
3982 | out: | |
3983 | status = cqr->status == DASD_CQR_DONE; | |
8e09f215 | 3984 | dasd_sfree_request(cqr, cqr->memdev); |
1da177e4 LT |
3985 | return status; |
3986 | } | |
3987 | ||
8e09f215 | 3988 | /* |
f3eb5384 | 3989 | * Modify ccw/tcw in cqr so it can be started on a base device. |
8e09f215 SW |
3990 | * |
3991 | * Note that this is not enough to restart the cqr! | |
3992 | * Either reset cqr->startdev as well (summary unit check handling) | |
3993 | * or restart via separate cqr (as in ERP handling). | |
3994 | */ | |
3995 | void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) | |
3996 | { | |
3997 | struct ccw1 *ccw; | |
3998 | struct PFX_eckd_data *pfxdata; | |
f3eb5384 SW |
3999 | struct tcw *tcw; |
4000 | struct tccb *tccb; | |
4001 | struct dcw *dcw; | |
4002 | ||
4003 | if (cqr->cpmode == 1) { | |
4004 | tcw = cqr->cpaddr; | |
4005 | tccb = tcw_get_tccb(tcw); | |
4006 | dcw = (struct dcw *)&tccb->tca[0]; | |
4007 | pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; | |
8e09f215 SW |
4008 | pfxdata->validity.verify_base = 0; |
4009 | pfxdata->validity.hyper_pav = 0; | |
f3eb5384 SW |
4010 | } else { |
4011 | ccw = cqr->cpaddr; | |
4012 | pfxdata = cqr->data; | |
4013 | if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { | |
4014 | pfxdata->validity.verify_base = 0; | |
4015 | pfxdata->validity.hyper_pav = 0; | |
4016 | } | |
8e09f215 SW |
4017 | } |
4018 | } | |
4019 | ||
4020 | #define DASD_ECKD_CHANQ_MAX_SIZE 4 | |
4021 | ||
4022 | static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, | |
4023 | struct dasd_block *block, | |
4024 | struct request *req) | |
4025 | { | |
4026 | struct dasd_eckd_private *private; | |
4027 | struct dasd_device *startdev; | |
4028 | unsigned long flags; | |
4029 | struct dasd_ccw_req *cqr; | |
4030 | ||
4031 | startdev = dasd_alias_get_start_dev(base); | |
4032 | if (!startdev) | |
4033 | startdev = base; | |
543691a4 | 4034 | private = startdev->private; |
8e09f215 SW |
4035 | if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) |
4036 | return ERR_PTR(-EBUSY); | |
4037 | ||
4038 | spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); | |
4039 | private->count++; | |
e4dbb0f2 | 4040 | if ((base->features & DASD_FEATURE_USERAW)) |
bbc7f7ea | 4041 | cqr = dasd_eckd_build_cp_raw(startdev, block, req); |
e4dbb0f2 SH |
4042 | else |
4043 | cqr = dasd_eckd_build_cp(startdev, block, req); | |
8e09f215 SW |
4044 | if (IS_ERR(cqr)) |
4045 | private->count--; | |
4046 | spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); | |
4047 | return cqr; | |
4048 | } | |
4049 | ||
4050 | static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, | |
4051 | struct request *req) | |
4052 | { | |
4053 | struct dasd_eckd_private *private; | |
4054 | unsigned long flags; | |
4055 | ||
4056 | spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); | |
543691a4 | 4057 | private = cqr->memdev->private; |
8e09f215 SW |
4058 | private->count--; |
4059 | spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); | |
4060 | return dasd_eckd_free_cp(cqr, req); | |
4061 | } | |
4062 | ||
1da177e4 LT |
4063 | static int |
4064 | dasd_eckd_fill_info(struct dasd_device * device, | |
4065 | struct dasd_information2_t * info) | |
4066 | { | |
543691a4 | 4067 | struct dasd_eckd_private *private = device->private; |
1da177e4 | 4068 | |
1da177e4 LT |
4069 | info->label_block = 2; |
4070 | info->FBA_layout = private->uses_cdl ? 0 : 1; | |
4071 | info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; | |
543691a4 | 4072 | info->characteristics_size = sizeof(private->rdc_data); |
1da177e4 | 4073 | memcpy(info->characteristics, &private->rdc_data, |
543691a4 | 4074 | sizeof(private->rdc_data)); |
4abb08c2 SW |
4075 | info->confdata_size = min((unsigned long)private->conf_len, |
4076 | sizeof(info->configuration_data)); | |
4077 | memcpy(info->configuration_data, private->conf_data, | |
4078 | info->confdata_size); | |
1da177e4 LT |
4079 | return 0; |
4080 | } | |
4081 | ||
4082 | /* | |
4083 | * SECTION: ioctl functions for eckd devices. | |
4084 | */ | |
4085 | ||
4086 | /* | |
4087 | * Release device ioctl. | |
138c014d | 4088 | * Buils a channel programm to releases a prior reserved |
1da177e4 LT |
4089 | * (see dasd_eckd_reserve) device. |
4090 | */ | |
4091 | static int | |
1107ccfb | 4092 | dasd_eckd_release(struct dasd_device *device) |
1da177e4 | 4093 | { |
1da177e4 LT |
4094 | struct dasd_ccw_req *cqr; |
4095 | int rc; | |
f3eb5384 | 4096 | struct ccw1 *ccw; |
f932bcea | 4097 | int useglobal; |
1da177e4 LT |
4098 | |
4099 | if (!capable(CAP_SYS_ADMIN)) | |
4100 | return -EACCES; | |
4101 | ||
f932bcea | 4102 | useglobal = 0; |
68b781fe | 4103 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); |
1da177e4 | 4104 | if (IS_ERR(cqr)) { |
f932bcea SW |
4105 | mutex_lock(&dasd_reserve_mutex); |
4106 | useglobal = 1; | |
4107 | cqr = &dasd_reserve_req->cqr; | |
4108 | memset(cqr, 0, sizeof(*cqr)); | |
4109 | memset(&dasd_reserve_req->ccw, 0, | |
4110 | sizeof(dasd_reserve_req->ccw)); | |
4111 | cqr->cpaddr = &dasd_reserve_req->ccw; | |
4112 | cqr->data = &dasd_reserve_req->data; | |
4113 | cqr->magic = DASD_ECKD_MAGIC; | |
1da177e4 | 4114 | } |
f3eb5384 SW |
4115 | ccw = cqr->cpaddr; |
4116 | ccw->cmd_code = DASD_ECKD_CCW_RELEASE; | |
4117 | ccw->flags |= CCW_FLAG_SLI; | |
4118 | ccw->count = 32; | |
4119 | ccw->cda = (__u32)(addr_t) cqr->data; | |
8e09f215 SW |
4120 | cqr->startdev = device; |
4121 | cqr->memdev = device; | |
1da177e4 | 4122 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
1c01b8a5 | 4123 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
336c340b | 4124 | cqr->retries = 2; /* set retry counter to enable basic ERP */ |
1da177e4 | 4125 | cqr->expires = 2 * HZ; |
1aae0560 | 4126 | cqr->buildclk = get_tod_clock(); |
1da177e4 LT |
4127 | cqr->status = DASD_CQR_FILLED; |
4128 | ||
4129 | rc = dasd_sleep_on_immediatly(cqr); | |
5a27e60d SW |
4130 | if (!rc) |
4131 | clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); | |
1da177e4 | 4132 | |
f932bcea SW |
4133 | if (useglobal) |
4134 | mutex_unlock(&dasd_reserve_mutex); | |
4135 | else | |
4136 | dasd_sfree_request(cqr, cqr->memdev); | |
1da177e4 LT |
4137 | return rc; |
4138 | } | |
4139 | ||
4140 | /* | |
4141 | * Reserve device ioctl. | |
4142 | * Options are set to 'synchronous wait for interrupt' and | |
138c014d HH |
4143 | * 'timeout the request'. This leads to a terminate IO if |
4144 | * the interrupt is outstanding for a certain time. | |
1da177e4 LT |
4145 | */ |
4146 | static int | |
1107ccfb | 4147 | dasd_eckd_reserve(struct dasd_device *device) |
1da177e4 | 4148 | { |
1da177e4 LT |
4149 | struct dasd_ccw_req *cqr; |
4150 | int rc; | |
f3eb5384 | 4151 | struct ccw1 *ccw; |
f932bcea | 4152 | int useglobal; |
1da177e4 LT |
4153 | |
4154 | if (!capable(CAP_SYS_ADMIN)) | |
4155 | return -EACCES; | |
4156 | ||
f932bcea | 4157 | useglobal = 0; |
68b781fe | 4158 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); |
1da177e4 | 4159 | if (IS_ERR(cqr)) { |
f932bcea SW |
4160 | mutex_lock(&dasd_reserve_mutex); |
4161 | useglobal = 1; | |
4162 | cqr = &dasd_reserve_req->cqr; | |
4163 | memset(cqr, 0, sizeof(*cqr)); | |
4164 | memset(&dasd_reserve_req->ccw, 0, | |
4165 | sizeof(dasd_reserve_req->ccw)); | |
4166 | cqr->cpaddr = &dasd_reserve_req->ccw; | |
4167 | cqr->data = &dasd_reserve_req->data; | |
4168 | cqr->magic = DASD_ECKD_MAGIC; | |
1da177e4 | 4169 | } |
f3eb5384 SW |
4170 | ccw = cqr->cpaddr; |
4171 | ccw->cmd_code = DASD_ECKD_CCW_RESERVE; | |
4172 | ccw->flags |= CCW_FLAG_SLI; | |
4173 | ccw->count = 32; | |
4174 | ccw->cda = (__u32)(addr_t) cqr->data; | |
8e09f215 SW |
4175 | cqr->startdev = device; |
4176 | cqr->memdev = device; | |
1da177e4 | 4177 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
1c01b8a5 | 4178 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
336c340b | 4179 | cqr->retries = 2; /* set retry counter to enable basic ERP */ |
1da177e4 | 4180 | cqr->expires = 2 * HZ; |
1aae0560 | 4181 | cqr->buildclk = get_tod_clock(); |
1da177e4 LT |
4182 | cqr->status = DASD_CQR_FILLED; |
4183 | ||
4184 | rc = dasd_sleep_on_immediatly(cqr); | |
5a27e60d SW |
4185 | if (!rc) |
4186 | set_bit(DASD_FLAG_IS_RESERVED, &device->flags); | |
1da177e4 | 4187 | |
f932bcea SW |
4188 | if (useglobal) |
4189 | mutex_unlock(&dasd_reserve_mutex); | |
4190 | else | |
4191 | dasd_sfree_request(cqr, cqr->memdev); | |
1da177e4 LT |
4192 | return rc; |
4193 | } | |
4194 | ||
4195 | /* | |
4196 | * Steal lock ioctl - unconditional reserve device. | |
138c014d | 4197 | * Buils a channel programm to break a device's reservation. |
1da177e4 LT |
4198 | * (unconditional reserve) |
4199 | */ | |
4200 | static int | |
1107ccfb | 4201 | dasd_eckd_steal_lock(struct dasd_device *device) |
1da177e4 | 4202 | { |
1da177e4 LT |
4203 | struct dasd_ccw_req *cqr; |
4204 | int rc; | |
f3eb5384 | 4205 | struct ccw1 *ccw; |
f932bcea | 4206 | int useglobal; |
1da177e4 LT |
4207 | |
4208 | if (!capable(CAP_SYS_ADMIN)) | |
4209 | return -EACCES; | |
4210 | ||
f932bcea | 4211 | useglobal = 0; |
68b781fe | 4212 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); |
1da177e4 | 4213 | if (IS_ERR(cqr)) { |
f932bcea SW |
4214 | mutex_lock(&dasd_reserve_mutex); |
4215 | useglobal = 1; | |
4216 | cqr = &dasd_reserve_req->cqr; | |
4217 | memset(cqr, 0, sizeof(*cqr)); | |
4218 | memset(&dasd_reserve_req->ccw, 0, | |
4219 | sizeof(dasd_reserve_req->ccw)); | |
4220 | cqr->cpaddr = &dasd_reserve_req->ccw; | |
4221 | cqr->data = &dasd_reserve_req->data; | |
4222 | cqr->magic = DASD_ECKD_MAGIC; | |
1da177e4 | 4223 | } |
f3eb5384 SW |
4224 | ccw = cqr->cpaddr; |
4225 | ccw->cmd_code = DASD_ECKD_CCW_SLCK; | |
4226 | ccw->flags |= CCW_FLAG_SLI; | |
4227 | ccw->count = 32; | |
4228 | ccw->cda = (__u32)(addr_t) cqr->data; | |
8e09f215 SW |
4229 | cqr->startdev = device; |
4230 | cqr->memdev = device; | |
1da177e4 | 4231 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
1c01b8a5 | 4232 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
336c340b | 4233 | cqr->retries = 2; /* set retry counter to enable basic ERP */ |
1da177e4 | 4234 | cqr->expires = 2 * HZ; |
1aae0560 | 4235 | cqr->buildclk = get_tod_clock(); |
1da177e4 LT |
4236 | cqr->status = DASD_CQR_FILLED; |
4237 | ||
4238 | rc = dasd_sleep_on_immediatly(cqr); | |
5a27e60d SW |
4239 | if (!rc) |
4240 | set_bit(DASD_FLAG_IS_RESERVED, &device->flags); | |
1da177e4 | 4241 | |
f932bcea SW |
4242 | if (useglobal) |
4243 | mutex_unlock(&dasd_reserve_mutex); | |
4244 | else | |
4245 | dasd_sfree_request(cqr, cqr->memdev); | |
1da177e4 LT |
4246 | return rc; |
4247 | } | |
4248 | ||
196339f1 SW |
4249 | /* |
4250 | * SNID - Sense Path Group ID | |
4251 | * This ioctl may be used in situations where I/O is stalled due to | |
4252 | * a reserve, so if the normal dasd_smalloc_request fails, we use the | |
4253 | * preallocated dasd_reserve_req. | |
4254 | */ | |
4255 | static int dasd_eckd_snid(struct dasd_device *device, | |
4256 | void __user *argp) | |
4257 | { | |
4258 | struct dasd_ccw_req *cqr; | |
4259 | int rc; | |
4260 | struct ccw1 *ccw; | |
4261 | int useglobal; | |
4262 | struct dasd_snid_ioctl_data usrparm; | |
4263 | ||
4264 | if (!capable(CAP_SYS_ADMIN)) | |
4265 | return -EACCES; | |
4266 | ||
4267 | if (copy_from_user(&usrparm, argp, sizeof(usrparm))) | |
4268 | return -EFAULT; | |
4269 | ||
4270 | useglobal = 0; | |
4271 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, | |
4272 | sizeof(struct dasd_snid_data), device); | |
4273 | if (IS_ERR(cqr)) { | |
4274 | mutex_lock(&dasd_reserve_mutex); | |
4275 | useglobal = 1; | |
4276 | cqr = &dasd_reserve_req->cqr; | |
4277 | memset(cqr, 0, sizeof(*cqr)); | |
4278 | memset(&dasd_reserve_req->ccw, 0, | |
4279 | sizeof(dasd_reserve_req->ccw)); | |
4280 | cqr->cpaddr = &dasd_reserve_req->ccw; | |
4281 | cqr->data = &dasd_reserve_req->data; | |
4282 | cqr->magic = DASD_ECKD_MAGIC; | |
4283 | } | |
4284 | ccw = cqr->cpaddr; | |
4285 | ccw->cmd_code = DASD_ECKD_CCW_SNID; | |
4286 | ccw->flags |= CCW_FLAG_SLI; | |
4287 | ccw->count = 12; | |
4288 | ccw->cda = (__u32)(addr_t) cqr->data; | |
4289 | cqr->startdev = device; | |
4290 | cqr->memdev = device; | |
4291 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); | |
4292 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); | |
5a27e60d | 4293 | set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); |
196339f1 SW |
4294 | cqr->retries = 5; |
4295 | cqr->expires = 10 * HZ; | |
1aae0560 | 4296 | cqr->buildclk = get_tod_clock(); |
196339f1 SW |
4297 | cqr->status = DASD_CQR_FILLED; |
4298 | cqr->lpm = usrparm.path_mask; | |
4299 | ||
4300 | rc = dasd_sleep_on_immediatly(cqr); | |
4301 | /* verify that I/O processing didn't modify the path mask */ | |
4302 | if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) | |
4303 | rc = -EIO; | |
4304 | if (!rc) { | |
4305 | usrparm.data = *((struct dasd_snid_data *)cqr->data); | |
4306 | if (copy_to_user(argp, &usrparm, sizeof(usrparm))) | |
4307 | rc = -EFAULT; | |
4308 | } | |
4309 | ||
4310 | if (useglobal) | |
4311 | mutex_unlock(&dasd_reserve_mutex); | |
4312 | else | |
4313 | dasd_sfree_request(cqr, cqr->memdev); | |
4314 | return rc; | |
4315 | } | |
4316 | ||
1da177e4 LT |
4317 | /* |
4318 | * Read performance statistics | |
4319 | */ | |
4320 | static int | |
1107ccfb | 4321 | dasd_eckd_performance(struct dasd_device *device, void __user *argp) |
1da177e4 | 4322 | { |
1da177e4 LT |
4323 | struct dasd_psf_prssd_data *prssdp; |
4324 | struct dasd_rssd_perf_stats_t *stats; | |
4325 | struct dasd_ccw_req *cqr; | |
4326 | struct ccw1 *ccw; | |
4327 | int rc; | |
4328 | ||
68b781fe | 4329 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, |
8e09f215 SW |
4330 | (sizeof(struct dasd_psf_prssd_data) + |
4331 | sizeof(struct dasd_rssd_perf_stats_t)), | |
1da177e4 LT |
4332 | device); |
4333 | if (IS_ERR(cqr)) { | |
fc19f381 | 4334 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
1da177e4 LT |
4335 | "Could not allocate initialization request"); |
4336 | return PTR_ERR(cqr); | |
4337 | } | |
8e09f215 SW |
4338 | cqr->startdev = device; |
4339 | cqr->memdev = device; | |
1da177e4 | 4340 | cqr->retries = 0; |
eb6e199b | 4341 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
1da177e4 LT |
4342 | cqr->expires = 10 * HZ; |
4343 | ||
4344 | /* Prepare for Read Subsystem Data */ | |
4345 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
8e09f215 | 4346 | memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); |
1da177e4 | 4347 | prssdp->order = PSF_ORDER_PRSSD; |
5d67d164 | 4348 | prssdp->suborder = 0x01; /* Performance Statistics */ |
1da177e4 LT |
4349 | prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ |
4350 | ||
4351 | ccw = cqr->cpaddr; | |
4352 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
8e09f215 | 4353 | ccw->count = sizeof(struct dasd_psf_prssd_data); |
1da177e4 LT |
4354 | ccw->flags |= CCW_FLAG_CC; |
4355 | ccw->cda = (__u32)(addr_t) prssdp; | |
4356 | ||
4357 | /* Read Subsystem Data - Performance Statistics */ | |
4358 | stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); | |
8e09f215 | 4359 | memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); |
1da177e4 LT |
4360 | |
4361 | ccw++; | |
4362 | ccw->cmd_code = DASD_ECKD_CCW_RSSD; | |
8e09f215 | 4363 | ccw->count = sizeof(struct dasd_rssd_perf_stats_t); |
1da177e4 LT |
4364 | ccw->cda = (__u32)(addr_t) stats; |
4365 | ||
1aae0560 | 4366 | cqr->buildclk = get_tod_clock(); |
1da177e4 LT |
4367 | cqr->status = DASD_CQR_FILLED; |
4368 | rc = dasd_sleep_on(cqr); | |
4369 | if (rc == 0) { | |
1da177e4 LT |
4370 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; |
4371 | stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); | |
1107ccfb CH |
4372 | if (copy_to_user(argp, stats, |
4373 | sizeof(struct dasd_rssd_perf_stats_t))) | |
4374 | rc = -EFAULT; | |
1da177e4 | 4375 | } |
8e09f215 | 4376 | dasd_sfree_request(cqr, cqr->memdev); |
1da177e4 LT |
4377 | return rc; |
4378 | } | |
4379 | ||
4380 | /* | |
4381 | * Get attributes (cache operations) | |
4382 | * Returnes the cache attributes used in Define Extend (DE). | |
4383 | */ | |
4384 | static int | |
1107ccfb | 4385 | dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) |
1da177e4 | 4386 | { |
543691a4 | 4387 | struct dasd_eckd_private *private = device->private; |
1107ccfb | 4388 | struct attrib_data_t attrib = private->attrib; |
1da177e4 LT |
4389 | int rc; |
4390 | ||
4391 | if (!capable(CAP_SYS_ADMIN)) | |
4392 | return -EACCES; | |
1107ccfb | 4393 | if (!argp) |
1da177e4 LT |
4394 | return -EINVAL; |
4395 | ||
1107ccfb CH |
4396 | rc = 0; |
4397 | if (copy_to_user(argp, (long *) &attrib, | |
8e09f215 | 4398 | sizeof(struct attrib_data_t))) |
1107ccfb | 4399 | rc = -EFAULT; |
1da177e4 LT |
4400 | |
4401 | return rc; | |
4402 | } | |
4403 | ||
4404 | /* | |
4405 | * Set attributes (cache operations) | |
4406 | * Stores the attributes for cache operation to be used in Define Extend (DE). | |
4407 | */ | |
4408 | static int | |
1107ccfb | 4409 | dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) |
1da177e4 | 4410 | { |
543691a4 | 4411 | struct dasd_eckd_private *private = device->private; |
1da177e4 LT |
4412 | struct attrib_data_t attrib; |
4413 | ||
4414 | if (!capable(CAP_SYS_ADMIN)) | |
4415 | return -EACCES; | |
1107ccfb | 4416 | if (!argp) |
1da177e4 LT |
4417 | return -EINVAL; |
4418 | ||
1107ccfb | 4419 | if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) |
1da177e4 | 4420 | return -EFAULT; |
1da177e4 LT |
4421 | private->attrib = attrib; |
4422 | ||
fc19f381 SH |
4423 | dev_info(&device->cdev->dev, |
4424 | "The DASD cache mode was set to %x (%i cylinder prestage)\n", | |
4425 | private->attrib.operation, private->attrib.nr_cyl); | |
1da177e4 LT |
4426 | return 0; |
4427 | } | |
4428 | ||
ab1d848f NH |
4429 | /* |
4430 | * Issue syscall I/O to EMC Symmetrix array. | |
4431 | * CCWs are PSF and RSSD | |
4432 | */ | |
4433 | static int dasd_symm_io(struct dasd_device *device, void __user *argp) | |
4434 | { | |
4435 | struct dasd_symmio_parms usrparm; | |
4436 | char *psf_data, *rssd_result; | |
4437 | struct dasd_ccw_req *cqr; | |
4438 | struct ccw1 *ccw; | |
52898025 | 4439 | char psf0, psf1; |
ab1d848f NH |
4440 | int rc; |
4441 | ||
52898025 NH |
4442 | if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) |
4443 | return -EACCES; | |
4444 | psf0 = psf1 = 0; | |
4445 | ||
ab1d848f NH |
4446 | /* Copy parms from caller */ |
4447 | rc = -EFAULT; | |
4448 | if (copy_from_user(&usrparm, argp, sizeof(usrparm))) | |
4449 | goto out; | |
92d62891 | 4450 | if (is_compat_task()) { |
f8b06859 | 4451 | /* Make sure pointers are sane even on 31 bit. */ |
ab1d848f | 4452 | rc = -EINVAL; |
f8b06859 HC |
4453 | if ((usrparm.psf_data >> 32) != 0) |
4454 | goto out; | |
4455 | if ((usrparm.rssd_result >> 32) != 0) | |
4456 | goto out; | |
4457 | usrparm.psf_data &= 0x7fffffffULL; | |
4458 | usrparm.rssd_result &= 0x7fffffffULL; | |
ab1d848f | 4459 | } |
ab1d848f NH |
4460 | /* alloc I/O data area */ |
4461 | psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); | |
4462 | rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); | |
4463 | if (!psf_data || !rssd_result) { | |
4464 | rc = -ENOMEM; | |
4465 | goto out_free; | |
4466 | } | |
4467 | ||
4468 | /* get syscall header from user space */ | |
4469 | rc = -EFAULT; | |
4470 | if (copy_from_user(psf_data, | |
4471 | (void __user *)(unsigned long) usrparm.psf_data, | |
4472 | usrparm.psf_data_len)) | |
4473 | goto out_free; | |
52898025 NH |
4474 | psf0 = psf_data[0]; |
4475 | psf1 = psf_data[1]; | |
ab1d848f NH |
4476 | |
4477 | /* setup CCWs for PSF + RSSD */ | |
68b781fe | 4478 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device); |
ab1d848f | 4479 | if (IS_ERR(cqr)) { |
fc19f381 | 4480 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
ab1d848f NH |
4481 | "Could not allocate initialization request"); |
4482 | rc = PTR_ERR(cqr); | |
4483 | goto out_free; | |
4484 | } | |
4485 | ||
4486 | cqr->startdev = device; | |
4487 | cqr->memdev = device; | |
4488 | cqr->retries = 3; | |
4489 | cqr->expires = 10 * HZ; | |
1aae0560 | 4490 | cqr->buildclk = get_tod_clock(); |
ab1d848f NH |
4491 | cqr->status = DASD_CQR_FILLED; |
4492 | ||
4493 | /* Build the ccws */ | |
4494 | ccw = cqr->cpaddr; | |
4495 | ||
4496 | /* PSF ccw */ | |
4497 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
4498 | ccw->count = usrparm.psf_data_len; | |
4499 | ccw->flags |= CCW_FLAG_CC; | |
4500 | ccw->cda = (__u32)(addr_t) psf_data; | |
4501 | ||
4502 | ccw++; | |
4503 | ||
4504 | /* RSSD ccw */ | |
4505 | ccw->cmd_code = DASD_ECKD_CCW_RSSD; | |
4506 | ccw->count = usrparm.rssd_result_len; | |
4507 | ccw->flags = CCW_FLAG_SLI ; | |
4508 | ccw->cda = (__u32)(addr_t) rssd_result; | |
4509 | ||
4510 | rc = dasd_sleep_on(cqr); | |
4511 | if (rc) | |
4512 | goto out_sfree; | |
4513 | ||
4514 | rc = -EFAULT; | |
4515 | if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, | |
4516 | rssd_result, usrparm.rssd_result_len)) | |
4517 | goto out_sfree; | |
4518 | rc = 0; | |
4519 | ||
4520 | out_sfree: | |
4521 | dasd_sfree_request(cqr, cqr->memdev); | |
4522 | out_free: | |
4523 | kfree(rssd_result); | |
4524 | kfree(psf_data); | |
4525 | out: | |
52898025 NH |
4526 | DBF_DEV_EVENT(DBF_WARNING, device, |
4527 | "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", | |
4528 | (int) psf0, (int) psf1, rc); | |
ab1d848f NH |
4529 | return rc; |
4530 | } | |
4531 | ||
1107ccfb | 4532 | static int |
8e09f215 | 4533 | dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) |
1107ccfb | 4534 | { |
8e09f215 SW |
4535 | struct dasd_device *device = block->base; |
4536 | ||
1107ccfb CH |
4537 | switch (cmd) { |
4538 | case BIODASDGATTR: | |
4539 | return dasd_eckd_get_attrib(device, argp); | |
4540 | case BIODASDSATTR: | |
4541 | return dasd_eckd_set_attrib(device, argp); | |
4542 | case BIODASDPSRD: | |
4543 | return dasd_eckd_performance(device, argp); | |
4544 | case BIODASDRLSE: | |
4545 | return dasd_eckd_release(device); | |
4546 | case BIODASDRSRV: | |
4547 | return dasd_eckd_reserve(device); | |
4548 | case BIODASDSLCK: | |
4549 | return dasd_eckd_steal_lock(device); | |
196339f1 SW |
4550 | case BIODASDSNID: |
4551 | return dasd_eckd_snid(device, argp); | |
ab1d848f NH |
4552 | case BIODASDSYMMIO: |
4553 | return dasd_symm_io(device, argp); | |
1107ccfb | 4554 | default: |
6b79d14e | 4555 | return -ENOTTY; |
1107ccfb CH |
4556 | } |
4557 | } | |
4558 | ||
445b5b49 HH |
4559 | /* |
4560 | * Dump the range of CCWs into 'page' buffer | |
4561 | * and return number of printed chars. | |
4562 | */ | |
4d284cac | 4563 | static int |
445b5b49 HH |
4564 | dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) |
4565 | { | |
4566 | int len, count; | |
4567 | char *datap; | |
4568 | ||
4569 | len = 0; | |
4570 | while (from <= to) { | |
773bab4a | 4571 | len += sprintf(page + len, PRINTK_HEADER |
445b5b49 HH |
4572 | " CCW %p: %08X %08X DAT:", |
4573 | from, ((int *) from)[0], ((int *) from)[1]); | |
4574 | ||
4575 | /* get pointer to data (consider IDALs) */ | |
4576 | if (from->flags & CCW_FLAG_IDA) | |
4577 | datap = (char *) *((addr_t *) (addr_t) from->cda); | |
4578 | else | |
4579 | datap = (char *) ((addr_t) from->cda); | |
4580 | ||
4581 | /* dump data (max 32 bytes) */ | |
4582 | for (count = 0; count < from->count && count < 32; count++) { | |
4583 | if (count % 8 == 0) len += sprintf(page + len, " "); | |
4584 | if (count % 4 == 0) len += sprintf(page + len, " "); | |
4585 | len += sprintf(page + len, "%02x", datap[count]); | |
4586 | } | |
4587 | len += sprintf(page + len, "\n"); | |
4588 | from++; | |
4589 | } | |
4590 | return len; | |
4591 | } | |
4592 | ||
fc19f381 | 4593 | static void |
aeec92ca SH |
4594 | dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, |
4595 | char *reason) | |
fc19f381 SH |
4596 | { |
4597 | u64 *sense; | |
a5a0061f | 4598 | u64 *stat; |
aeec92ca SH |
4599 | |
4600 | sense = (u64 *) dasd_get_sense(irb); | |
a5a0061f | 4601 | stat = (u64 *) &irb->scsw; |
fc19f381 | 4602 | if (sense) { |
a5a0061f SW |
4603 | DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " |
4604 | "%016llx %016llx %016llx %016llx", | |
4605 | reason, *stat, *((u32 *) (stat + 1)), | |
ed3640b2 | 4606 | sense[0], sense[1], sense[2], sense[3]); |
fc19f381 | 4607 | } else { |
a5a0061f SW |
4608 | DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", |
4609 | reason, *stat, *((u32 *) (stat + 1)), | |
4610 | "NO VALID SENSE"); | |
fc19f381 SH |
4611 | } |
4612 | } | |
4613 | ||
1da177e4 LT |
4614 | /* |
4615 | * Print sense data and related channel program. | |
4616 | * Parts are printed because printk buffer is only 1024 bytes. | |
4617 | */ | |
f3eb5384 | 4618 | static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, |
8e09f215 | 4619 | struct dasd_ccw_req *req, struct irb *irb) |
1da177e4 LT |
4620 | { |
4621 | char *page; | |
445b5b49 HH |
4622 | struct ccw1 *first, *last, *fail, *from, *to; |
4623 | int len, sl, sct; | |
1da177e4 LT |
4624 | |
4625 | page = (char *) get_zeroed_page(GFP_ATOMIC); | |
4626 | if (page == NULL) { | |
fc19f381 SH |
4627 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
4628 | "No memory to dump sense data\n"); | |
1da177e4 LT |
4629 | return; |
4630 | } | |
445b5b49 | 4631 | /* dump the sense data */ |
773bab4a | 4632 | len = sprintf(page, PRINTK_HEADER |
1da177e4 | 4633 | " I/O status report for device %s:\n", |
2a0217d5 | 4634 | dev_name(&device->cdev->dev)); |
773bab4a | 4635 | len += sprintf(page + len, PRINTK_HEADER |
a5a0061f SW |
4636 | " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " |
4637 | "CS:%02X RC:%d\n", | |
4638 | req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), | |
4639 | scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), | |
4640 | scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), | |
4641 | req ? req->intrc : 0); | |
773bab4a | 4642 | len += sprintf(page + len, PRINTK_HEADER |
1da177e4 | 4643 | " device %s: Failing CCW: %p\n", |
2a0217d5 | 4644 | dev_name(&device->cdev->dev), |
23d805b6 | 4645 | (void *) (addr_t) irb->scsw.cmd.cpa); |
1da177e4 LT |
4646 | if (irb->esw.esw0.erw.cons) { |
4647 | for (sl = 0; sl < 4; sl++) { | |
773bab4a | 4648 | len += sprintf(page + len, PRINTK_HEADER |
1da177e4 LT |
4649 | " Sense(hex) %2d-%2d:", |
4650 | (8 * sl), ((8 * sl) + 7)); | |
4651 | ||
4652 | for (sct = 0; sct < 8; sct++) { | |
4653 | len += sprintf(page + len, " %02x", | |
4654 | irb->ecw[8 * sl + sct]); | |
4655 | } | |
4656 | len += sprintf(page + len, "\n"); | |
4657 | } | |
4658 | ||
4659 | if (irb->ecw[27] & DASD_SENSE_BIT_0) { | |
4660 | /* 24 Byte Sense Data */ | |
773bab4a | 4661 | sprintf(page + len, PRINTK_HEADER |
445b5b49 HH |
4662 | " 24 Byte: %x MSG %x, " |
4663 | "%s MSGb to SYSOP\n", | |
4664 | irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, | |
4665 | irb->ecw[1] & 0x10 ? "" : "no"); | |
1da177e4 LT |
4666 | } else { |
4667 | /* 32 Byte Sense Data */ | |
773bab4a | 4668 | sprintf(page + len, PRINTK_HEADER |
445b5b49 HH |
4669 | " 32 Byte: Format: %x " |
4670 | "Exception class %x\n", | |
4671 | irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); | |
1da177e4 LT |
4672 | } |
4673 | } else { | |
773bab4a | 4674 | sprintf(page + len, PRINTK_HEADER |
445b5b49 | 4675 | " SORRY - NO VALID SENSE AVAILABLE\n"); |
1da177e4 | 4676 | } |
773bab4a | 4677 | printk(KERN_ERR "%s", page); |
445b5b49 | 4678 | |
8e09f215 SW |
4679 | if (req) { |
4680 | /* req == NULL for unsolicited interrupts */ | |
4681 | /* dump the Channel Program (max 140 Bytes per line) */ | |
4682 | /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ | |
4683 | first = req->cpaddr; | |
4684 | for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); | |
4685 | to = min(first + 6, last); | |
773bab4a | 4686 | len = sprintf(page, PRINTK_HEADER |
8e09f215 SW |
4687 | " Related CP in req: %p\n", req); |
4688 | dasd_eckd_dump_ccw_range(first, to, page + len); | |
773bab4a | 4689 | printk(KERN_ERR "%s", page); |
1da177e4 | 4690 | |
8e09f215 SW |
4691 | /* print failing CCW area (maximum 4) */ |
4692 | /* scsw->cda is either valid or zero */ | |
4693 | len = 0; | |
4694 | from = ++to; | |
23d805b6 PO |
4695 | fail = (struct ccw1 *)(addr_t) |
4696 | irb->scsw.cmd.cpa; /* failing CCW */ | |
8e09f215 SW |
4697 | if (from < fail - 2) { |
4698 | from = fail - 2; /* there is a gap - print header */ | |
773bab4a | 4699 | len += sprintf(page, PRINTK_HEADER "......\n"); |
8e09f215 SW |
4700 | } |
4701 | to = min(fail + 1, last); | |
4702 | len += dasd_eckd_dump_ccw_range(from, to, page + len); | |
4703 | ||
4704 | /* print last CCWs (maximum 2) */ | |
4705 | from = max(from, ++to); | |
4706 | if (from < last - 1) { | |
4707 | from = last - 1; /* there is a gap - print header */ | |
773bab4a | 4708 | len += sprintf(page + len, PRINTK_HEADER "......\n"); |
8e09f215 SW |
4709 | } |
4710 | len += dasd_eckd_dump_ccw_range(from, last, page + len); | |
4711 | if (len > 0) | |
773bab4a | 4712 | printk(KERN_ERR "%s", page); |
1da177e4 | 4713 | } |
1da177e4 LT |
4714 | free_page((unsigned long) page); |
4715 | } | |
4716 | ||
f3eb5384 SW |
4717 | |
4718 | /* | |
4719 | * Print sense data from a tcw. | |
4720 | */ | |
4721 | static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, | |
4722 | struct dasd_ccw_req *req, struct irb *irb) | |
4723 | { | |
4724 | char *page; | |
4725 | int len, sl, sct, residual; | |
f3eb5384 | 4726 | struct tsb *tsb; |
ef19298b | 4727 | u8 *sense, *rcq; |
f3eb5384 SW |
4728 | |
4729 | page = (char *) get_zeroed_page(GFP_ATOMIC); | |
4730 | if (page == NULL) { | |
fc19f381 | 4731 | DBF_DEV_EVENT(DBF_WARNING, device, " %s", |
f3eb5384 SW |
4732 | "No memory to dump sense data"); |
4733 | return; | |
4734 | } | |
4735 | /* dump the sense data */ | |
773bab4a | 4736 | len = sprintf(page, PRINTK_HEADER |
f3eb5384 SW |
4737 | " I/O status report for device %s:\n", |
4738 | dev_name(&device->cdev->dev)); | |
773bab4a | 4739 | len += sprintf(page + len, PRINTK_HEADER |
a5a0061f SW |
4740 | " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " |
4741 | "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", | |
4742 | req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), | |
4743 | scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), | |
4744 | scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), | |
a521b048 SH |
4745 | irb->scsw.tm.fcxs, |
4746 | (irb->scsw.tm.ifob << 7) | irb->scsw.tm.sesq, | |
a5a0061f | 4747 | req ? req->intrc : 0); |
773bab4a | 4748 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4749 | " device %s: Failing TCW: %p\n", |
4750 | dev_name(&device->cdev->dev), | |
4751 | (void *) (addr_t) irb->scsw.tm.tcw); | |
4752 | ||
4753 | tsb = NULL; | |
4754 | sense = NULL; | |
a5a0061f | 4755 | if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) |
f3eb5384 SW |
4756 | tsb = tcw_get_tsb( |
4757 | (struct tcw *)(unsigned long)irb->scsw.tm.tcw); | |
4758 | ||
b8fde722 | 4759 | if (tsb) { |
773bab4a | 4760 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 | 4761 | " tsb->length %d\n", tsb->length); |
773bab4a | 4762 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 | 4763 | " tsb->flags %x\n", tsb->flags); |
773bab4a | 4764 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 | 4765 | " tsb->dcw_offset %d\n", tsb->dcw_offset); |
773bab4a | 4766 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4767 | " tsb->count %d\n", tsb->count); |
4768 | residual = tsb->count - 28; | |
773bab4a | 4769 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4770 | " residual %d\n", residual); |
4771 | ||
4772 | switch (tsb->flags & 0x07) { | |
4773 | case 1: /* tsa_iostat */ | |
773bab4a | 4774 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4775 | " tsb->tsa.iostat.dev_time %d\n", |
4776 | tsb->tsa.iostat.dev_time); | |
773bab4a | 4777 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4778 | " tsb->tsa.iostat.def_time %d\n", |
4779 | tsb->tsa.iostat.def_time); | |
773bab4a | 4780 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4781 | " tsb->tsa.iostat.queue_time %d\n", |
4782 | tsb->tsa.iostat.queue_time); | |
773bab4a | 4783 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4784 | " tsb->tsa.iostat.dev_busy_time %d\n", |
4785 | tsb->tsa.iostat.dev_busy_time); | |
773bab4a | 4786 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4787 | " tsb->tsa.iostat.dev_act_time %d\n", |
4788 | tsb->tsa.iostat.dev_act_time); | |
4789 | sense = tsb->tsa.iostat.sense; | |
4790 | break; | |
4791 | case 2: /* ts_ddpc */ | |
773bab4a | 4792 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 | 4793 | " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); |
ef19298b | 4794 | for (sl = 0; sl < 2; sl++) { |
773bab4a | 4795 | len += sprintf(page + len, PRINTK_HEADER |
ef19298b SW |
4796 | " tsb->tsa.ddpc.rcq %2d-%2d: ", |
4797 | (8 * sl), ((8 * sl) + 7)); | |
4798 | rcq = tsb->tsa.ddpc.rcq; | |
f3eb5384 SW |
4799 | for (sct = 0; sct < 8; sct++) { |
4800 | len += sprintf(page + len, " %02x", | |
ef19298b | 4801 | rcq[8 * sl + sct]); |
f3eb5384 SW |
4802 | } |
4803 | len += sprintf(page + len, "\n"); | |
4804 | } | |
4805 | sense = tsb->tsa.ddpc.sense; | |
4806 | break; | |
4807 | case 3: /* tsa_intrg */ | |
773bab4a | 4808 | len += sprintf(page + len, PRINTK_HEADER |
8693b914 | 4809 | " tsb->tsa.intrg.: not supported yet\n"); |
f3eb5384 SW |
4810 | break; |
4811 | } | |
4812 | ||
4813 | if (sense) { | |
4814 | for (sl = 0; sl < 4; sl++) { | |
773bab4a | 4815 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4816 | " Sense(hex) %2d-%2d:", |
4817 | (8 * sl), ((8 * sl) + 7)); | |
4818 | for (sct = 0; sct < 8; sct++) { | |
4819 | len += sprintf(page + len, " %02x", | |
4820 | sense[8 * sl + sct]); | |
4821 | } | |
4822 | len += sprintf(page + len, "\n"); | |
4823 | } | |
4824 | ||
4825 | if (sense[27] & DASD_SENSE_BIT_0) { | |
4826 | /* 24 Byte Sense Data */ | |
773bab4a | 4827 | sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4828 | " 24 Byte: %x MSG %x, " |
4829 | "%s MSGb to SYSOP\n", | |
4830 | sense[7] >> 4, sense[7] & 0x0f, | |
4831 | sense[1] & 0x10 ? "" : "no"); | |
4832 | } else { | |
4833 | /* 32 Byte Sense Data */ | |
773bab4a | 4834 | sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4835 | " 32 Byte: Format: %x " |
4836 | "Exception class %x\n", | |
4837 | sense[6] & 0x0f, sense[22] >> 4); | |
4838 | } | |
4839 | } else { | |
773bab4a | 4840 | sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4841 | " SORRY - NO VALID SENSE AVAILABLE\n"); |
4842 | } | |
4843 | } else { | |
773bab4a | 4844 | sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4845 | " SORRY - NO TSB DATA AVAILABLE\n"); |
4846 | } | |
773bab4a | 4847 | printk(KERN_ERR "%s", page); |
f3eb5384 SW |
4848 | free_page((unsigned long) page); |
4849 | } | |
4850 | ||
4851 | static void dasd_eckd_dump_sense(struct dasd_device *device, | |
4852 | struct dasd_ccw_req *req, struct irb *irb) | |
4853 | { | |
8fd57520 JH |
4854 | u8 *sense = dasd_get_sense(irb); |
4855 | ||
4856 | if (scsw_is_tm(&irb->scsw)) { | |
4857 | /* | |
4858 | * In some cases the 'File Protected' or 'Incorrect Length' | |
4859 | * error might be expected and log messages shouldn't be written | |
4860 | * then. Check if the according suppress bit is set. | |
4861 | */ | |
4862 | if (sense && (sense[1] & SNS1_FILE_PROTECTED) && | |
4863 | test_bit(DASD_CQR_SUPPRESS_FP, &req->flags)) | |
4864 | return; | |
4865 | if (scsw_cstat(&irb->scsw) == 0x40 && | |
4866 | test_bit(DASD_CQR_SUPPRESS_IL, &req->flags)) | |
4867 | return; | |
4868 | ||
f3eb5384 | 4869 | dasd_eckd_dump_sense_tcw(device, req, irb); |
8fd57520 JH |
4870 | } else { |
4871 | /* | |
ab24fbd3 SH |
4872 | * In some cases the 'Command Reject' or 'No Record Found' |
4873 | * error might be expected and log messages shouldn't be | |
4874 | * written then. Check if the according suppress bit is set. | |
8fd57520 | 4875 | */ |
ab24fbd3 SH |
4876 | if (sense && sense[0] & SNS0_CMD_REJECT && |
4877 | test_bit(DASD_CQR_SUPPRESS_CR, &req->flags)) | |
4878 | return; | |
4879 | ||
8fd57520 JH |
4880 | if (sense && sense[1] & SNS1_NO_REC_FOUND && |
4881 | test_bit(DASD_CQR_SUPPRESS_NRF, &req->flags)) | |
4882 | return; | |
4883 | ||
f3eb5384 | 4884 | dasd_eckd_dump_sense_ccw(device, req, irb); |
8fd57520 | 4885 | } |
f3eb5384 SW |
4886 | } |
4887 | ||
501183f2 | 4888 | static int dasd_eckd_pm_freeze(struct dasd_device *device) |
d41dd122 SH |
4889 | { |
4890 | /* | |
4891 | * the device should be disconnected from our LCU structure | |
4892 | * on restore we will reconnect it and reread LCU specific | |
4893 | * information like PAV support that might have changed | |
4894 | */ | |
4895 | dasd_alias_remove_device(device); | |
4896 | dasd_alias_disconnect_device_from_lcu(device); | |
4897 | ||
4898 | return 0; | |
4899 | } | |
4900 | ||
501183f2 | 4901 | static int dasd_eckd_restore_device(struct dasd_device *device) |
d41dd122 | 4902 | { |
543691a4 | 4903 | struct dasd_eckd_private *private = device->private; |
6fca97a9 | 4904 | struct dasd_eckd_characteristics temp_rdc_data; |
f9f8d02f | 4905 | int rc; |
d41dd122 | 4906 | struct dasd_uid temp_uid; |
a7602f6c | 4907 | unsigned long flags; |
ea4da6ea | 4908 | unsigned long cqr_flags = 0; |
d41dd122 | 4909 | |
d41dd122 | 4910 | /* Read Configuration Data */ |
251afd69 SH |
4911 | rc = dasd_eckd_read_conf(device); |
4912 | if (rc) { | |
4913 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, | |
4914 | "Read configuration data failed, rc=%d", rc); | |
4915 | goto out_err; | |
4916 | } | |
d41dd122 | 4917 | |
2dedf0d9 SH |
4918 | dasd_eckd_get_uid(device, &temp_uid); |
4919 | /* Generate device unique id */ | |
4920 | rc = dasd_eckd_generate_uid(device); | |
4921 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); | |
d41dd122 | 4922 | if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) |
a7602f6c SH |
4923 | dev_err(&device->cdev->dev, "The UID of the DASD has " |
4924 | "changed\n"); | |
2dedf0d9 | 4925 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
d41dd122 SH |
4926 | if (rc) |
4927 | goto out_err; | |
d41dd122 SH |
4928 | |
4929 | /* register lcu with alias handling, enable PAV if this is a new lcu */ | |
f9f8d02f SH |
4930 | rc = dasd_alias_make_device_known_to_lcu(device); |
4931 | if (rc) | |
251afd69 | 4932 | goto out_err; |
ea4da6ea SH |
4933 | |
4934 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags); | |
4935 | dasd_eckd_validate_server(device, cqr_flags); | |
f4ac1d02 SW |
4936 | |
4937 | /* RE-Read Configuration Data */ | |
251afd69 SH |
4938 | rc = dasd_eckd_read_conf(device); |
4939 | if (rc) { | |
4940 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, | |
4941 | "Read configuration data failed, rc=%d", rc); | |
4942 | goto out_err2; | |
4943 | } | |
d41dd122 SH |
4944 | |
4945 | /* Read Feature Codes */ | |
68d1e5f0 | 4946 | dasd_eckd_read_features(device); |
d41dd122 SH |
4947 | |
4948 | /* Read Device Characteristics */ | |
68b781fe | 4949 | rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, |
6fca97a9 | 4950 | &temp_rdc_data, 64); |
d41dd122 | 4951 | if (rc) { |
b8ed5dd5 SH |
4952 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, |
4953 | "Read device characteristic failed, rc=%d", rc); | |
251afd69 | 4954 | goto out_err2; |
d41dd122 | 4955 | } |
a7602f6c | 4956 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); |
6fca97a9 | 4957 | memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); |
a7602f6c | 4958 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
d41dd122 SH |
4959 | |
4960 | /* add device to alias management */ | |
4961 | dasd_alias_add_device(device); | |
4962 | ||
4963 | return 0; | |
4964 | ||
251afd69 SH |
4965 | out_err2: |
4966 | dasd_alias_disconnect_device_from_lcu(device); | |
d41dd122 | 4967 | out_err: |
e6125fba | 4968 | return -1; |
d41dd122 SH |
4969 | } |
4970 | ||
501183f2 SH |
4971 | static int dasd_eckd_reload_device(struct dasd_device *device) |
4972 | { | |
543691a4 | 4973 | struct dasd_eckd_private *private = device->private; |
501183f2 | 4974 | int rc, old_base; |
2dedf0d9 SH |
4975 | char print_uid[60]; |
4976 | struct dasd_uid uid; | |
4977 | unsigned long flags; | |
501183f2 | 4978 | |
59a9ed5f SH |
4979 | /* |
4980 | * remove device from alias handling to prevent new requests | |
4981 | * from being scheduled on the wrong alias device | |
4982 | */ | |
4983 | dasd_alias_remove_device(device); | |
4984 | ||
2dedf0d9 | 4985 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); |
501183f2 | 4986 | old_base = private->uid.base_unit_addr; |
2dedf0d9 SH |
4987 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
4988 | ||
501183f2 SH |
4989 | /* Read Configuration Data */ |
4990 | rc = dasd_eckd_read_conf(device); | |
4991 | if (rc) | |
4992 | goto out_err; | |
4993 | ||
2dedf0d9 | 4994 | rc = dasd_eckd_generate_uid(device); |
501183f2 SH |
4995 | if (rc) |
4996 | goto out_err; | |
501183f2 SH |
4997 | /* |
4998 | * update unit address configuration and | |
4999 | * add device to alias management | |
5000 | */ | |
5001 | dasd_alias_update_add_device(device); | |
5002 | ||
2dedf0d9 SH |
5003 | dasd_eckd_get_uid(device, &uid); |
5004 | ||
5005 | if (old_base != uid.base_unit_addr) { | |
5006 | if (strlen(uid.vduit) > 0) | |
5007 | snprintf(print_uid, sizeof(print_uid), | |
5008 | "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, | |
5009 | uid.ssid, uid.base_unit_addr, uid.vduit); | |
501183f2 | 5010 | else |
2dedf0d9 SH |
5011 | snprintf(print_uid, sizeof(print_uid), |
5012 | "%s.%s.%04x.%02x", uid.vendor, uid.serial, | |
5013 | uid.ssid, uid.base_unit_addr); | |
501183f2 SH |
5014 | |
5015 | dev_info(&device->cdev->dev, | |
5016 | "An Alias device was reassigned to a new base device " | |
2dedf0d9 | 5017 | "with UID: %s\n", print_uid); |
501183f2 SH |
5018 | } |
5019 | return 0; | |
5020 | ||
5021 | out_err: | |
5022 | return -1; | |
5023 | } | |
5024 | ||
5db8440c SH |
5025 | static int dasd_eckd_read_message_buffer(struct dasd_device *device, |
5026 | struct dasd_rssd_messages *messages, | |
5027 | __u8 lpum) | |
5028 | { | |
5029 | struct dasd_rssd_messages *message_buf; | |
5030 | struct dasd_psf_prssd_data *prssdp; | |
5db8440c SH |
5031 | struct dasd_ccw_req *cqr; |
5032 | struct ccw1 *ccw; | |
5033 | int rc; | |
5034 | ||
5db8440c SH |
5035 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, |
5036 | (sizeof(struct dasd_psf_prssd_data) + | |
5037 | sizeof(struct dasd_rssd_messages)), | |
5038 | device); | |
5039 | if (IS_ERR(cqr)) { | |
5040 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
5041 | "Could not allocate read message buffer request"); | |
5042 | return PTR_ERR(cqr); | |
5043 | } | |
5044 | ||
af775210 SH |
5045 | cqr->lpm = lpum; |
5046 | retry: | |
5db8440c SH |
5047 | cqr->startdev = device; |
5048 | cqr->memdev = device; | |
5049 | cqr->block = NULL; | |
5db8440c | 5050 | cqr->expires = 10 * HZ; |
5db8440c | 5051 | set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); |
b179b037 SH |
5052 | /* dasd_sleep_on_immediatly does not do complex error |
5053 | * recovery so clear erp flag and set retry counter to | |
5054 | * do basic erp */ | |
5055 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); | |
5056 | cqr->retries = 256; | |
5db8440c SH |
5057 | |
5058 | /* Prepare for Read Subsystem Data */ | |
5059 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
5060 | memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); | |
5061 | prssdp->order = PSF_ORDER_PRSSD; | |
5062 | prssdp->suborder = 0x03; /* Message Buffer */ | |
5063 | /* all other bytes of prssdp must be zero */ | |
5064 | ||
5065 | ccw = cqr->cpaddr; | |
5066 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
5067 | ccw->count = sizeof(struct dasd_psf_prssd_data); | |
5068 | ccw->flags |= CCW_FLAG_CC; | |
5069 | ccw->flags |= CCW_FLAG_SLI; | |
5070 | ccw->cda = (__u32)(addr_t) prssdp; | |
5071 | ||
5072 | /* Read Subsystem Data - message buffer */ | |
5073 | message_buf = (struct dasd_rssd_messages *) (prssdp + 1); | |
5074 | memset(message_buf, 0, sizeof(struct dasd_rssd_messages)); | |
5075 | ||
5076 | ccw++; | |
5077 | ccw->cmd_code = DASD_ECKD_CCW_RSSD; | |
5078 | ccw->count = sizeof(struct dasd_rssd_messages); | |
5079 | ccw->flags |= CCW_FLAG_SLI; | |
5080 | ccw->cda = (__u32)(addr_t) message_buf; | |
5081 | ||
5082 | cqr->buildclk = get_tod_clock(); | |
5083 | cqr->status = DASD_CQR_FILLED; | |
5084 | rc = dasd_sleep_on_immediatly(cqr); | |
5085 | if (rc == 0) { | |
5086 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
5087 | message_buf = (struct dasd_rssd_messages *) | |
5088 | (prssdp + 1); | |
5089 | memcpy(messages, message_buf, | |
5090 | sizeof(struct dasd_rssd_messages)); | |
af775210 SH |
5091 | } else if (cqr->lpm) { |
5092 | /* | |
5093 | * on z/VM we might not be able to do I/O on the requested path | |
5094 | * but instead we get the required information on any path | |
5095 | * so retry with open path mask | |
5096 | */ | |
5097 | cqr->lpm = 0; | |
5098 | goto retry; | |
5db8440c SH |
5099 | } else |
5100 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, | |
5101 | "Reading messages failed with rc=%d\n" | |
5102 | , rc); | |
5103 | dasd_sfree_request(cqr, cqr->memdev); | |
5104 | return rc; | |
5105 | } | |
5106 | ||
5a3b7b11 SH |
5107 | static int dasd_eckd_query_host_access(struct dasd_device *device, |
5108 | struct dasd_psf_query_host_access *data) | |
5109 | { | |
5110 | struct dasd_eckd_private *private = device->private; | |
5111 | struct dasd_psf_query_host_access *host_access; | |
5112 | struct dasd_psf_prssd_data *prssdp; | |
5113 | struct dasd_ccw_req *cqr; | |
5114 | struct ccw1 *ccw; | |
5115 | int rc; | |
5116 | ||
5117 | /* not available for HYPER PAV alias devices */ | |
5118 | if (!device->block && private->lcu->pav == HYPER_PAV) | |
5119 | return -EOPNOTSUPP; | |
5120 | ||
ccd53fa2 SH |
5121 | /* may not be supported by the storage server */ |
5122 | if (!(private->features.feature[14] & 0x80)) | |
5123 | return -EOPNOTSUPP; | |
5124 | ||
5a3b7b11 SH |
5125 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, |
5126 | sizeof(struct dasd_psf_prssd_data) + 1, | |
5127 | device); | |
5128 | if (IS_ERR(cqr)) { | |
5129 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
5130 | "Could not allocate read message buffer request"); | |
5131 | return PTR_ERR(cqr); | |
5132 | } | |
5133 | host_access = kzalloc(sizeof(*host_access), GFP_KERNEL | GFP_DMA); | |
5134 | if (!host_access) { | |
5135 | dasd_sfree_request(cqr, device); | |
5136 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
5137 | "Could not allocate host_access buffer"); | |
5138 | return -ENOMEM; | |
5139 | } | |
5140 | cqr->startdev = device; | |
5141 | cqr->memdev = device; | |
5142 | cqr->block = NULL; | |
5143 | cqr->retries = 256; | |
5144 | cqr->expires = 10 * HZ; | |
5145 | ||
5146 | /* Prepare for Read Subsystem Data */ | |
5147 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
5148 | memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); | |
5149 | prssdp->order = PSF_ORDER_PRSSD; | |
5150 | prssdp->suborder = PSF_SUBORDER_QHA; /* query host access */ | |
5151 | /* LSS and Volume that will be queried */ | |
5152 | prssdp->lss = private->ned->ID; | |
5153 | prssdp->volume = private->ned->unit_addr; | |
5154 | /* all other bytes of prssdp must be zero */ | |
5155 | ||
5156 | ccw = cqr->cpaddr; | |
5157 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
5158 | ccw->count = sizeof(struct dasd_psf_prssd_data); | |
5159 | ccw->flags |= CCW_FLAG_CC; | |
5160 | ccw->flags |= CCW_FLAG_SLI; | |
5161 | ccw->cda = (__u32)(addr_t) prssdp; | |
5162 | ||
5163 | /* Read Subsystem Data - query host access */ | |
5164 | ccw++; | |
5165 | ccw->cmd_code = DASD_ECKD_CCW_RSSD; | |
5166 | ccw->count = sizeof(struct dasd_psf_query_host_access); | |
5167 | ccw->flags |= CCW_FLAG_SLI; | |
5168 | ccw->cda = (__u32)(addr_t) host_access; | |
5169 | ||
5170 | cqr->buildclk = get_tod_clock(); | |
5171 | cqr->status = DASD_CQR_FILLED; | |
ab24fbd3 SH |
5172 | /* the command might not be supported, suppress error message */ |
5173 | __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); | |
f50af850 | 5174 | rc = dasd_sleep_on_interruptible(cqr); |
5a3b7b11 SH |
5175 | if (rc == 0) { |
5176 | *data = *host_access; | |
5177 | } else { | |
5178 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, | |
5179 | "Reading host access data failed with rc=%d\n", | |
5180 | rc); | |
5181 | rc = -EOPNOTSUPP; | |
5182 | } | |
5183 | ||
5184 | dasd_sfree_request(cqr, cqr->memdev); | |
5185 | kfree(host_access); | |
5186 | return rc; | |
5187 | } | |
5188 | /* | |
5189 | * return number of grouped devices | |
5190 | */ | |
5191 | static int dasd_eckd_host_access_count(struct dasd_device *device) | |
5192 | { | |
5193 | struct dasd_psf_query_host_access *access; | |
5194 | struct dasd_ckd_path_group_entry *entry; | |
5195 | struct dasd_ckd_host_information *info; | |
5196 | int count = 0; | |
5197 | int rc, i; | |
5198 | ||
5199 | access = kzalloc(sizeof(*access), GFP_NOIO); | |
5200 | if (!access) { | |
5201 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
5202 | "Could not allocate access buffer"); | |
5203 | return -ENOMEM; | |
5204 | } | |
5205 | rc = dasd_eckd_query_host_access(device, access); | |
5206 | if (rc) { | |
5207 | kfree(access); | |
5208 | return rc; | |
5209 | } | |
5210 | ||
5211 | info = (struct dasd_ckd_host_information *) | |
5212 | access->host_access_information; | |
5213 | for (i = 0; i < info->entry_count; i++) { | |
5214 | entry = (struct dasd_ckd_path_group_entry *) | |
5215 | (info->entry + i * info->entry_size); | |
5216 | if (entry->status_flags & DASD_ECKD_PG_GROUPED) | |
5217 | count++; | |
5218 | } | |
5219 | ||
5220 | kfree(access); | |
5221 | return count; | |
5222 | } | |
5223 | ||
5224 | /* | |
5225 | * write host access information to a sequential file | |
5226 | */ | |
5227 | static int dasd_hosts_print(struct dasd_device *device, struct seq_file *m) | |
5228 | { | |
5229 | struct dasd_psf_query_host_access *access; | |
5230 | struct dasd_ckd_path_group_entry *entry; | |
5231 | struct dasd_ckd_host_information *info; | |
5232 | char sysplex[9] = ""; | |
5233 | int rc, i, j; | |
5234 | ||
5235 | access = kzalloc(sizeof(*access), GFP_NOIO); | |
5236 | if (!access) { | |
5237 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
5238 | "Could not allocate access buffer"); | |
5239 | return -ENOMEM; | |
5240 | } | |
5241 | rc = dasd_eckd_query_host_access(device, access); | |
5242 | if (rc) { | |
5243 | kfree(access); | |
5244 | return rc; | |
5245 | } | |
5246 | ||
5247 | info = (struct dasd_ckd_host_information *) | |
5248 | access->host_access_information; | |
5249 | for (i = 0; i < info->entry_count; i++) { | |
5250 | entry = (struct dasd_ckd_path_group_entry *) | |
5251 | (info->entry + i * info->entry_size); | |
5252 | /* PGID */ | |
5253 | seq_puts(m, "pgid "); | |
5254 | for (j = 0; j < 11; j++) | |
5255 | seq_printf(m, "%02x", entry->pgid[j]); | |
5256 | seq_putc(m, '\n'); | |
5257 | /* FLAGS */ | |
5258 | seq_printf(m, "status_flags %02x\n", entry->status_flags); | |
5259 | /* SYSPLEX NAME */ | |
5260 | memcpy(&sysplex, &entry->sysplex_name, sizeof(sysplex) - 1); | |
5261 | EBCASC(sysplex, sizeof(sysplex)); | |
5262 | seq_printf(m, "sysplex_name %8s\n", sysplex); | |
5263 | /* SUPPORTED CYLINDER */ | |
5264 | seq_printf(m, "supported_cylinder %d\n", entry->cylinder); | |
5265 | /* TIMESTAMP */ | |
5266 | seq_printf(m, "timestamp %lu\n", (unsigned long) | |
5267 | entry->timestamp); | |
5268 | } | |
5269 | kfree(access); | |
5270 | ||
5271 | return 0; | |
5272 | } | |
5273 | ||
5db8440c SH |
5274 | /* |
5275 | * Perform Subsystem Function - CUIR response | |
5276 | */ | |
5277 | static int | |
5278 | dasd_eckd_psf_cuir_response(struct dasd_device *device, int response, | |
a521b048 | 5279 | __u32 message_id, __u8 lpum) |
5db8440c SH |
5280 | { |
5281 | struct dasd_psf_cuir_response *psf_cuir; | |
a521b048 | 5282 | int pos = pathmask_to_pos(lpum); |
5db8440c SH |
5283 | struct dasd_ccw_req *cqr; |
5284 | struct ccw1 *ccw; | |
5285 | int rc; | |
5286 | ||
5287 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , | |
5288 | sizeof(struct dasd_psf_cuir_response), | |
5289 | device); | |
5290 | ||
5291 | if (IS_ERR(cqr)) { | |
5292 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", | |
5293 | "Could not allocate PSF-CUIR request"); | |
5294 | return PTR_ERR(cqr); | |
5295 | } | |
5296 | ||
5297 | psf_cuir = (struct dasd_psf_cuir_response *)cqr->data; | |
5298 | psf_cuir->order = PSF_ORDER_CUIR_RESPONSE; | |
5299 | psf_cuir->cc = response; | |
a521b048 | 5300 | psf_cuir->chpid = device->path[pos].chpid; |
5db8440c | 5301 | psf_cuir->message_id = message_id; |
a521b048 SH |
5302 | psf_cuir->cssid = device->path[pos].cssid; |
5303 | psf_cuir->ssid = device->path[pos].ssid; | |
5db8440c SH |
5304 | ccw = cqr->cpaddr; |
5305 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
5306 | ccw->cda = (__u32)(addr_t)psf_cuir; | |
b179b037 | 5307 | ccw->flags = CCW_FLAG_SLI; |
5db8440c SH |
5308 | ccw->count = sizeof(struct dasd_psf_cuir_response); |
5309 | ||
5310 | cqr->startdev = device; | |
5311 | cqr->memdev = device; | |
5312 | cqr->block = NULL; | |
5313 | cqr->retries = 256; | |
5314 | cqr->expires = 10*HZ; | |
5315 | cqr->buildclk = get_tod_clock(); | |
5316 | cqr->status = DASD_CQR_FILLED; | |
b179b037 | 5317 | set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); |
5db8440c SH |
5318 | |
5319 | rc = dasd_sleep_on(cqr); | |
5320 | ||
5321 | dasd_sfree_request(cqr, cqr->memdev); | |
5322 | return rc; | |
5323 | } | |
5324 | ||
b179b037 SH |
5325 | /* |
5326 | * return configuration data that is referenced by record selector | |
5327 | * if a record selector is specified or per default return the | |
5328 | * conf_data pointer for the path specified by lpum | |
5329 | */ | |
5330 | static struct dasd_conf_data *dasd_eckd_get_ref_conf(struct dasd_device *device, | |
5331 | __u8 lpum, | |
5332 | struct dasd_cuir_message *cuir) | |
5db8440c | 5333 | { |
b179b037 SH |
5334 | struct dasd_conf_data *conf_data; |
5335 | int path, pos; | |
5db8440c | 5336 | |
b179b037 SH |
5337 | if (cuir->record_selector == 0) |
5338 | goto out; | |
5339 | for (path = 0x80, pos = 0; path; path >>= 1, pos++) { | |
c9346151 | 5340 | conf_data = device->path[pos].conf_data; |
b179b037 SH |
5341 | if (conf_data->gneq.record_selector == |
5342 | cuir->record_selector) | |
5343 | return conf_data; | |
5db8440c | 5344 | } |
b179b037 | 5345 | out: |
c9346151 | 5346 | return device->path[pathmask_to_pos(lpum)].conf_data; |
5db8440c SH |
5347 | } |
5348 | ||
5349 | /* | |
b179b037 SH |
5350 | * This function determines the scope of a reconfiguration request by |
5351 | * analysing the path and device selection data provided in the CUIR request. | |
5352 | * Returns a path mask containing CUIR affected paths for the give device. | |
5353 | * | |
5354 | * If the CUIR request does not contain the required information return the | |
5355 | * path mask of the path the attention message for the CUIR request was reveived | |
5356 | * on. | |
5357 | */ | |
5358 | static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum, | |
5359 | struct dasd_cuir_message *cuir) | |
5360 | { | |
5361 | struct dasd_conf_data *ref_conf_data; | |
5362 | unsigned long bitmask = 0, mask = 0; | |
b179b037 SH |
5363 | struct dasd_conf_data *conf_data; |
5364 | unsigned int pos, path; | |
5365 | char *ref_gneq, *gneq; | |
5366 | char *ref_ned, *ned; | |
5367 | int tbcpm = 0; | |
5368 | ||
5369 | /* if CUIR request does not specify the scope use the path | |
5370 | the attention message was presented on */ | |
5371 | if (!cuir->ned_map || | |
5372 | !(cuir->neq_map[0] | cuir->neq_map[1] | cuir->neq_map[2])) | |
5373 | return lpum; | |
5374 | ||
b179b037 SH |
5375 | /* get reference conf data */ |
5376 | ref_conf_data = dasd_eckd_get_ref_conf(device, lpum, cuir); | |
5377 | /* reference ned is determined by ned_map field */ | |
5378 | pos = 8 - ffs(cuir->ned_map); | |
5379 | ref_ned = (char *)&ref_conf_data->neds[pos]; | |
5380 | ref_gneq = (char *)&ref_conf_data->gneq; | |
5381 | /* transfer 24 bit neq_map to mask */ | |
5382 | mask = cuir->neq_map[2]; | |
5383 | mask |= cuir->neq_map[1] << 8; | |
5384 | mask |= cuir->neq_map[0] << 16; | |
5385 | ||
c9346151 | 5386 | for (path = 0; path < 8; path++) { |
b179b037 SH |
5387 | /* initialise data per path */ |
5388 | bitmask = mask; | |
c9346151 | 5389 | conf_data = device->path[path].conf_data; |
b179b037 SH |
5390 | pos = 8 - ffs(cuir->ned_map); |
5391 | ned = (char *) &conf_data->neds[pos]; | |
5392 | /* compare reference ned and per path ned */ | |
5393 | if (memcmp(ref_ned, ned, sizeof(*ned)) != 0) | |
5394 | continue; | |
5395 | gneq = (char *)&conf_data->gneq; | |
5396 | /* compare reference gneq and per_path gneq under | |
5397 | 24 bit mask where mask bit 0 equals byte 7 of | |
5398 | the gneq and mask bit 24 equals byte 31 */ | |
5399 | while (bitmask) { | |
5400 | pos = ffs(bitmask) - 1; | |
5401 | if (memcmp(&ref_gneq[31 - pos], &gneq[31 - pos], 1) | |
5402 | != 0) | |
5403 | break; | |
5404 | clear_bit(pos, &bitmask); | |
5405 | } | |
5406 | if (bitmask) | |
5407 | continue; | |
5408 | /* device and path match the reference values | |
5409 | add path to CUIR scope */ | |
c9346151 | 5410 | tbcpm |= 0x80 >> path; |
b179b037 SH |
5411 | } |
5412 | return tbcpm; | |
5413 | } | |
5414 | ||
5415 | static void dasd_eckd_cuir_notify_user(struct dasd_device *device, | |
a521b048 | 5416 | unsigned long paths, int action) |
b179b037 | 5417 | { |
b179b037 SH |
5418 | int pos; |
5419 | ||
5420 | while (paths) { | |
5421 | /* get position of bit in mask */ | |
a521b048 | 5422 | pos = 8 - ffs(paths); |
b179b037 | 5423 | /* get channel path descriptor from this position */ |
b179b037 | 5424 | if (action == CUIR_QUIESCE) |
a521b048 SH |
5425 | pr_warn("Service on the storage server caused path %x.%02x to go offline", |
5426 | device->path[pos].cssid, | |
5427 | device->path[pos].chpid); | |
b179b037 | 5428 | else if (action == CUIR_RESUME) |
a521b048 SH |
5429 | pr_info("Path %x.%02x is back online after service on the storage server", |
5430 | device->path[pos].cssid, | |
5431 | device->path[pos].chpid); | |
5432 | clear_bit(7 - pos, &paths); | |
b179b037 SH |
5433 | } |
5434 | } | |
5435 | ||
5436 | static int dasd_eckd_cuir_remove_path(struct dasd_device *device, __u8 lpum, | |
5437 | struct dasd_cuir_message *cuir) | |
5438 | { | |
5439 | unsigned long tbcpm; | |
5440 | ||
5441 | tbcpm = dasd_eckd_cuir_scope(device, lpum, cuir); | |
5442 | /* nothing to do if path is not in use */ | |
c9346151 | 5443 | if (!(dasd_path_get_opm(device) & tbcpm)) |
b179b037 | 5444 | return 0; |
c9346151 | 5445 | if (!(dasd_path_get_opm(device) & ~tbcpm)) { |
b179b037 SH |
5446 | /* no path would be left if the CUIR action is taken |
5447 | return error */ | |
5448 | return -EINVAL; | |
5449 | } | |
5450 | /* remove device from operational path mask */ | |
c9346151 SH |
5451 | dasd_path_remove_opm(device, tbcpm); |
5452 | dasd_path_add_cuirpm(device, tbcpm); | |
b179b037 SH |
5453 | return tbcpm; |
5454 | } | |
5455 | ||
5456 | /* | |
5457 | * walk through all devices and build a path mask to quiesce them | |
5458 | * return an error if the last path to a device would be removed | |
5db8440c SH |
5459 | * |
5460 | * if only part of the devices are quiesced and an error | |
5461 | * occurs no onlining necessary, the storage server will | |
5462 | * notify the already set offline devices again | |
5463 | */ | |
5464 | static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum, | |
b179b037 | 5465 | struct dasd_cuir_message *cuir) |
5db8440c | 5466 | { |
543691a4 | 5467 | struct dasd_eckd_private *private = device->private; |
5db8440c | 5468 | struct alias_pav_group *pavgroup, *tempgroup; |
5db8440c | 5469 | struct dasd_device *dev, *n; |
b179b037 SH |
5470 | unsigned long paths = 0; |
5471 | unsigned long flags; | |
5472 | int tbcpm; | |
5db8440c | 5473 | |
5db8440c | 5474 | /* active devices */ |
b179b037 | 5475 | list_for_each_entry_safe(dev, n, &private->lcu->active_devices, |
5db8440c | 5476 | alias_list) { |
b179b037 SH |
5477 | spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); |
5478 | tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); | |
5479 | spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); | |
5480 | if (tbcpm < 0) | |
5481 | goto out_err; | |
5482 | paths |= tbcpm; | |
5db8440c | 5483 | } |
5db8440c | 5484 | /* inactive devices */ |
b179b037 | 5485 | list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, |
5db8440c | 5486 | alias_list) { |
b179b037 SH |
5487 | spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); |
5488 | tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); | |
5489 | spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); | |
5490 | if (tbcpm < 0) | |
5491 | goto out_err; | |
5492 | paths |= tbcpm; | |
5db8440c | 5493 | } |
5db8440c SH |
5494 | /* devices in PAV groups */ |
5495 | list_for_each_entry_safe(pavgroup, tempgroup, | |
5496 | &private->lcu->grouplist, group) { | |
5497 | list_for_each_entry_safe(dev, n, &pavgroup->baselist, | |
5498 | alias_list) { | |
b179b037 SH |
5499 | spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); |
5500 | tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); | |
5501 | spin_unlock_irqrestore( | |
5502 | get_ccwdev_lock(dev->cdev), flags); | |
5503 | if (tbcpm < 0) | |
5504 | goto out_err; | |
5505 | paths |= tbcpm; | |
5db8440c SH |
5506 | } |
5507 | list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, | |
5508 | alias_list) { | |
b179b037 SH |
5509 | spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); |
5510 | tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); | |
5511 | spin_unlock_irqrestore( | |
5512 | get_ccwdev_lock(dev->cdev), flags); | |
5513 | if (tbcpm < 0) | |
5514 | goto out_err; | |
5515 | paths |= tbcpm; | |
5db8440c SH |
5516 | } |
5517 | } | |
b179b037 | 5518 | /* notify user about all paths affected by CUIR action */ |
a521b048 | 5519 | dasd_eckd_cuir_notify_user(device, paths, CUIR_QUIESCE); |
b179b037 SH |
5520 | return 0; |
5521 | out_err: | |
5522 | return tbcpm; | |
5db8440c SH |
5523 | } |
5524 | ||
5525 | static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum, | |
b179b037 | 5526 | struct dasd_cuir_message *cuir) |
5db8440c | 5527 | { |
543691a4 | 5528 | struct dasd_eckd_private *private = device->private; |
5db8440c | 5529 | struct alias_pav_group *pavgroup, *tempgroup; |
5db8440c | 5530 | struct dasd_device *dev, *n; |
b179b037 SH |
5531 | unsigned long paths = 0; |
5532 | int tbcpm; | |
5db8440c | 5533 | |
5db8440c SH |
5534 | /* |
5535 | * the path may have been added through a generic path event before | |
5536 | * only trigger path verification if the path is not already in use | |
5537 | */ | |
5db8440c SH |
5538 | list_for_each_entry_safe(dev, n, |
5539 | &private->lcu->active_devices, | |
5540 | alias_list) { | |
b179b037 SH |
5541 | tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); |
5542 | paths |= tbcpm; | |
c9346151 SH |
5543 | if (!(dasd_path_get_opm(dev) & tbcpm)) { |
5544 | dasd_path_add_tbvpm(dev, tbcpm); | |
5db8440c SH |
5545 | dasd_schedule_device_bh(dev); |
5546 | } | |
5547 | } | |
5db8440c SH |
5548 | list_for_each_entry_safe(dev, n, |
5549 | &private->lcu->inactive_devices, | |
5550 | alias_list) { | |
b179b037 SH |
5551 | tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); |
5552 | paths |= tbcpm; | |
c9346151 SH |
5553 | if (!(dasd_path_get_opm(dev) & tbcpm)) { |
5554 | dasd_path_add_tbvpm(dev, tbcpm); | |
5db8440c SH |
5555 | dasd_schedule_device_bh(dev); |
5556 | } | |
5557 | } | |
5db8440c SH |
5558 | /* devices in PAV groups */ |
5559 | list_for_each_entry_safe(pavgroup, tempgroup, | |
5560 | &private->lcu->grouplist, | |
5561 | group) { | |
5562 | list_for_each_entry_safe(dev, n, | |
5563 | &pavgroup->baselist, | |
5564 | alias_list) { | |
b179b037 SH |
5565 | tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); |
5566 | paths |= tbcpm; | |
c9346151 SH |
5567 | if (!(dasd_path_get_opm(dev) & tbcpm)) { |
5568 | dasd_path_add_tbvpm(dev, tbcpm); | |
5db8440c SH |
5569 | dasd_schedule_device_bh(dev); |
5570 | } | |
5571 | } | |
5572 | list_for_each_entry_safe(dev, n, | |
5573 | &pavgroup->aliaslist, | |
5574 | alias_list) { | |
b179b037 SH |
5575 | tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); |
5576 | paths |= tbcpm; | |
c9346151 SH |
5577 | if (!(dasd_path_get_opm(dev) & tbcpm)) { |
5578 | dasd_path_add_tbvpm(dev, tbcpm); | |
5db8440c SH |
5579 | dasd_schedule_device_bh(dev); |
5580 | } | |
5581 | } | |
5582 | } | |
b179b037 | 5583 | /* notify user about all paths affected by CUIR action */ |
a521b048 | 5584 | dasd_eckd_cuir_notify_user(device, paths, CUIR_RESUME); |
b179b037 | 5585 | return 0; |
5db8440c SH |
5586 | } |
5587 | ||
5588 | static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages, | |
5589 | __u8 lpum) | |
5590 | { | |
5591 | struct dasd_cuir_message *cuir = messages; | |
a521b048 | 5592 | int response; |
5db8440c | 5593 | |
b179b037 SH |
5594 | DBF_DEV_EVENT(DBF_WARNING, device, |
5595 | "CUIR request: %016llx %016llx %016llx %08x", | |
5596 | ((u64 *)cuir)[0], ((u64 *)cuir)[1], ((u64 *)cuir)[2], | |
5597 | ((u32 *)cuir)[3]); | |
5db8440c SH |
5598 | |
5599 | if (cuir->code == CUIR_QUIESCE) { | |
5600 | /* quiesce */ | |
a521b048 | 5601 | if (dasd_eckd_cuir_quiesce(device, lpum, cuir)) |
b179b037 SH |
5602 | response = PSF_CUIR_LAST_PATH; |
5603 | else | |
5604 | response = PSF_CUIR_COMPLETED; | |
5db8440c SH |
5605 | } else if (cuir->code == CUIR_RESUME) { |
5606 | /* resume */ | |
a521b048 | 5607 | dasd_eckd_cuir_resume(device, lpum, cuir); |
b179b037 | 5608 | response = PSF_CUIR_COMPLETED; |
5db8440c SH |
5609 | } else |
5610 | response = PSF_CUIR_NOT_SUPPORTED; | |
5611 | ||
b179b037 | 5612 | dasd_eckd_psf_cuir_response(device, response, |
a521b048 | 5613 | cuir->message_id, lpum); |
b179b037 SH |
5614 | DBF_DEV_EVENT(DBF_WARNING, device, |
5615 | "CUIR response: %d on message ID %08x", response, | |
5616 | cuir->message_id); | |
b179b037 SH |
5617 | /* to make sure there is no attention left schedule work again */ |
5618 | device->discipline->check_attention(device, lpum); | |
5db8440c SH |
5619 | } |
5620 | ||
5621 | static void dasd_eckd_check_attention_work(struct work_struct *work) | |
5622 | { | |
5623 | struct check_attention_work_data *data; | |
5624 | struct dasd_rssd_messages *messages; | |
5625 | struct dasd_device *device; | |
5626 | int rc; | |
5627 | ||
5628 | data = container_of(work, struct check_attention_work_data, worker); | |
5629 | device = data->device; | |
5db8440c SH |
5630 | messages = kzalloc(sizeof(*messages), GFP_KERNEL); |
5631 | if (!messages) { | |
5632 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", | |
5633 | "Could not allocate attention message buffer"); | |
5634 | goto out; | |
5635 | } | |
5db8440c SH |
5636 | rc = dasd_eckd_read_message_buffer(device, messages, data->lpum); |
5637 | if (rc) | |
5638 | goto out; | |
5db8440c SH |
5639 | if (messages->length == ATTENTION_LENGTH_CUIR && |
5640 | messages->format == ATTENTION_FORMAT_CUIR) | |
5641 | dasd_eckd_handle_cuir(device, messages, data->lpum); | |
5db8440c SH |
5642 | out: |
5643 | dasd_put_device(device); | |
5644 | kfree(messages); | |
5645 | kfree(data); | |
5646 | } | |
5647 | ||
5648 | static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum) | |
5649 | { | |
5650 | struct check_attention_work_data *data; | |
5651 | ||
5652 | data = kzalloc(sizeof(*data), GFP_ATOMIC); | |
5653 | if (!data) | |
5654 | return -ENOMEM; | |
5655 | INIT_WORK(&data->worker, dasd_eckd_check_attention_work); | |
5656 | dasd_get_device(device); | |
5657 | data->device = device; | |
5658 | data->lpum = lpum; | |
5659 | schedule_work(&data->worker); | |
5660 | return 0; | |
5661 | } | |
5662 | ||
a521b048 SH |
5663 | static int dasd_eckd_disable_hpf_path(struct dasd_device *device, __u8 lpum) |
5664 | { | |
5665 | if (~lpum & dasd_path_get_opm(device)) { | |
5666 | dasd_path_add_nohpfpm(device, lpum); | |
5667 | dasd_path_remove_opm(device, lpum); | |
5668 | dev_err(&device->cdev->dev, | |
5669 | "Channel path %02X lost HPF functionality and is disabled\n", | |
5670 | lpum); | |
5671 | return 1; | |
5672 | } | |
5673 | return 0; | |
5674 | } | |
5675 | ||
5676 | static void dasd_eckd_disable_hpf_device(struct dasd_device *device) | |
5677 | { | |
5678 | struct dasd_eckd_private *private = device->private; | |
5679 | ||
5680 | dev_err(&device->cdev->dev, | |
5681 | "High Performance FICON disabled\n"); | |
5682 | private->fcx_max_data = 0; | |
5683 | } | |
5684 | ||
5685 | static int dasd_eckd_hpf_enabled(struct dasd_device *device) | |
5686 | { | |
5687 | struct dasd_eckd_private *private = device->private; | |
5688 | ||
5689 | return private->fcx_max_data ? 1 : 0; | |
5690 | } | |
5691 | ||
5692 | static void dasd_eckd_handle_hpf_error(struct dasd_device *device, | |
5693 | struct irb *irb) | |
5694 | { | |
5695 | struct dasd_eckd_private *private = device->private; | |
5696 | ||
5697 | if (!private->fcx_max_data) { | |
5698 | /* sanity check for no HPF, the error makes no sense */ | |
5699 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", | |
5700 | "Trying to disable HPF for a non HPF device"); | |
5701 | return; | |
5702 | } | |
5703 | if (irb->scsw.tm.sesq == SCSW_SESQ_DEV_NOFCX) { | |
5704 | dasd_eckd_disable_hpf_device(device); | |
5705 | } else if (irb->scsw.tm.sesq == SCSW_SESQ_PATH_NOFCX) { | |
5706 | if (dasd_eckd_disable_hpf_path(device, irb->esw.esw1.lpum)) | |
5707 | return; | |
5708 | dasd_eckd_disable_hpf_device(device); | |
5709 | dasd_path_set_tbvpm(device, | |
5710 | dasd_path_get_hpfpm(device)); | |
5711 | } | |
5712 | /* | |
5713 | * prevent that any new I/O ist started on the device and schedule a | |
5714 | * requeue of existing requests | |
5715 | */ | |
5716 | dasd_device_set_stop_bits(device, DASD_STOPPED_NOT_ACC); | |
5717 | dasd_schedule_requeue(device); | |
5718 | } | |
5719 | ||
d41dd122 | 5720 | static struct ccw_driver dasd_eckd_driver = { |
3bda058b SO |
5721 | .driver = { |
5722 | .name = "dasd-eckd", | |
5723 | .owner = THIS_MODULE, | |
5724 | }, | |
d41dd122 SH |
5725 | .ids = dasd_eckd_ids, |
5726 | .probe = dasd_eckd_probe, | |
5727 | .remove = dasd_generic_remove, | |
5728 | .set_offline = dasd_generic_set_offline, | |
5729 | .set_online = dasd_eckd_set_online, | |
5730 | .notify = dasd_generic_notify, | |
a4d26c6a | 5731 | .path_event = dasd_generic_path_event, |
4679e893 | 5732 | .shutdown = dasd_generic_shutdown, |
d41dd122 SH |
5733 | .freeze = dasd_generic_pm_freeze, |
5734 | .thaw = dasd_generic_restore_device, | |
5735 | .restore = dasd_generic_restore_device, | |
a23ed009 | 5736 | .uc_handler = dasd_generic_uc_handler, |
420f42ec | 5737 | .int_class = IRQIO_DAS, |
d41dd122 | 5738 | }; |
f3eb5384 | 5739 | |
1da177e4 LT |
5740 | /* |
5741 | * max_blocks is dependent on the amount of storage that is available | |
5742 | * in the static io buffer for each device. Currently each device has | |
5743 | * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has | |
5744 | * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use | |
5745 | * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In | |
5746 | * addition we have one define extent ccw + 16 bytes of data and one | |
5747 | * locate record ccw + 16 bytes of data. That makes: | |
5748 | * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. | |
5749 | * We want to fit two into the available memory so that we can immediately | |
5750 | * start the next request if one finishes off. That makes 249.5 blocks | |
5751 | * for one request. Give a little safety and the result is 240. | |
5752 | */ | |
5753 | static struct dasd_discipline dasd_eckd_discipline = { | |
5754 | .owner = THIS_MODULE, | |
5755 | .name = "ECKD", | |
5756 | .ebcname = "ECKD", | |
ef19298b | 5757 | .max_blocks = 190, |
1da177e4 | 5758 | .check_device = dasd_eckd_check_characteristics, |
8e09f215 | 5759 | .uncheck_device = dasd_eckd_uncheck_device, |
1da177e4 | 5760 | .do_analysis = dasd_eckd_do_analysis, |
a4d26c6a | 5761 | .verify_path = dasd_eckd_verify_path, |
d42e1712 | 5762 | .basic_to_ready = dasd_eckd_basic_to_ready, |
8e09f215 | 5763 | .online_to_ready = dasd_eckd_online_to_ready, |
daa991bf | 5764 | .basic_to_known = dasd_eckd_basic_to_known, |
1da177e4 LT |
5765 | .fill_geometry = dasd_eckd_fill_geometry, |
5766 | .start_IO = dasd_start_IO, | |
5767 | .term_IO = dasd_term_IO, | |
8e09f215 | 5768 | .handle_terminated_request = dasd_eckd_handle_terminated_request, |
1da177e4 | 5769 | .format_device = dasd_eckd_format_device, |
8fd57520 | 5770 | .check_device_format = dasd_eckd_check_device_format, |
1da177e4 LT |
5771 | .erp_action = dasd_eckd_erp_action, |
5772 | .erp_postaction = dasd_eckd_erp_postaction, | |
5a27e60d | 5773 | .check_for_device_change = dasd_eckd_check_for_device_change, |
8e09f215 SW |
5774 | .build_cp = dasd_eckd_build_alias_cp, |
5775 | .free_cp = dasd_eckd_free_alias_cp, | |
1da177e4 | 5776 | .dump_sense = dasd_eckd_dump_sense, |
fc19f381 | 5777 | .dump_sense_dbf = dasd_eckd_dump_sense_dbf, |
1da177e4 | 5778 | .fill_info = dasd_eckd_fill_info, |
1107ccfb | 5779 | .ioctl = dasd_eckd_ioctl, |
d41dd122 SH |
5780 | .freeze = dasd_eckd_pm_freeze, |
5781 | .restore = dasd_eckd_restore_device, | |
501183f2 | 5782 | .reload = dasd_eckd_reload_device, |
2dedf0d9 | 5783 | .get_uid = dasd_eckd_get_uid, |
f1633031 | 5784 | .kick_validate = dasd_eckd_kick_validate_server, |
5db8440c | 5785 | .check_attention = dasd_eckd_check_attention, |
5a3b7b11 SH |
5786 | .host_access_count = dasd_eckd_host_access_count, |
5787 | .hosts_print = dasd_hosts_print, | |
a521b048 SH |
5788 | .handle_hpf_error = dasd_eckd_handle_hpf_error, |
5789 | .disable_hpf = dasd_eckd_disable_hpf_device, | |
5790 | .hpf_enabled = dasd_eckd_hpf_enabled, | |
5791 | .reset_path = dasd_eckd_reset_path, | |
1da177e4 LT |
5792 | }; |
5793 | ||
5794 | static int __init | |
5795 | dasd_eckd_init(void) | |
5796 | { | |
736e6ea0 SO |
5797 | int ret; |
5798 | ||
1da177e4 | 5799 | ASCEBC(dasd_eckd_discipline.ebcname, 4); |
f932bcea SW |
5800 | dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), |
5801 | GFP_KERNEL | GFP_DMA); | |
5802 | if (!dasd_reserve_req) | |
5803 | return -ENOMEM; | |
a4d26c6a SW |
5804 | path_verification_worker = kmalloc(sizeof(*path_verification_worker), |
5805 | GFP_KERNEL | GFP_DMA); | |
5806 | if (!path_verification_worker) { | |
5807 | kfree(dasd_reserve_req); | |
5808 | return -ENOMEM; | |
5809 | } | |
558b9ef0 SW |
5810 | rawpadpage = (void *)__get_free_page(GFP_KERNEL); |
5811 | if (!rawpadpage) { | |
5812 | kfree(path_verification_worker); | |
5813 | kfree(dasd_reserve_req); | |
5814 | return -ENOMEM; | |
5815 | } | |
736e6ea0 SO |
5816 | ret = ccw_driver_register(&dasd_eckd_driver); |
5817 | if (!ret) | |
5818 | wait_for_device_probe(); | |
a4d26c6a SW |
5819 | else { |
5820 | kfree(path_verification_worker); | |
f932bcea | 5821 | kfree(dasd_reserve_req); |
558b9ef0 | 5822 | free_page((unsigned long)rawpadpage); |
a4d26c6a | 5823 | } |
736e6ea0 | 5824 | return ret; |
1da177e4 LT |
5825 | } |
5826 | ||
5827 | static void __exit | |
5828 | dasd_eckd_cleanup(void) | |
5829 | { | |
5830 | ccw_driver_unregister(&dasd_eckd_driver); | |
a4d26c6a | 5831 | kfree(path_verification_worker); |
f932bcea | 5832 | kfree(dasd_reserve_req); |
558b9ef0 | 5833 | free_page((unsigned long)rawpadpage); |
1da177e4 LT |
5834 | } |
5835 | ||
5836 | module_init(dasd_eckd_init); | |
5837 | module_exit(dasd_eckd_cleanup); |