Commit | Line | Data |
---|---|---|
138c014d | 1 | /* |
1da177e4 | 2 | * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> |
138c014d | 3 | * Horst Hummel <Horst.Hummel@de.ibm.com> |
1da177e4 LT |
4 | * Carsten Otte <Cotte@de.ibm.com> |
5 | * Martin Schwidefsky <schwidefsky@de.ibm.com> | |
6 | * Bugreports.to..: <Linux390@de.ibm.com> | |
d41dd122 | 7 | * Copyright IBM Corp. 1999, 2009 |
ab1d848f NH |
8 | * EMC Symmetrix ioctl Copyright EMC Corporation, 2008 |
9 | * Author.........: Nigel Hislop <hislop_nigel@emc.com> | |
1da177e4 LT |
10 | */ |
11 | ||
ca99dab0 | 12 | #define KMSG_COMPONENT "dasd-eckd" |
fc19f381 | 13 | |
1da177e4 LT |
14 | #include <linux/stddef.h> |
15 | #include <linux/kernel.h> | |
16 | #include <linux/slab.h> | |
17 | #include <linux/hdreg.h> /* HDIO_GETGEO */ | |
18 | #include <linux/bio.h> | |
19 | #include <linux/module.h> | |
048cd4e5 | 20 | #include <linux/compat.h> |
1da177e4 | 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> | |
1da177e4 | 29 | #include <asm/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 | ||
4d284cac | 216 | static int |
1da177e4 LT |
217 | check_XRC (struct ccw1 *de_ccw, |
218 | struct DE_eckd_data *data, | |
219 | struct dasd_device *device) | |
220 | { | |
543691a4 | 221 | struct dasd_eckd_private *private = device->private; |
d54853ef | 222 | int rc; |
1da177e4 | 223 | |
d54853ef MS |
224 | if (!private->rdc_data.facilities.XRC_supported) |
225 | return 0; | |
1da177e4 LT |
226 | |
227 | /* switch on System Time Stamp - needed for XRC Support */ | |
d54853ef MS |
228 | data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ |
229 | data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ | |
1da177e4 | 230 | |
d54853ef MS |
231 | rc = get_sync_clock(&data->ep_sys_time); |
232 | /* Ignore return code if sync clock is switched off. */ | |
a8f6db4d | 233 | if (rc == -EOPNOTSUPP || rc == -EACCES) |
d54853ef | 234 | rc = 0; |
1da177e4 | 235 | |
8e09f215 | 236 | de_ccw->count = sizeof(struct DE_eckd_data); |
d54853ef MS |
237 | de_ccw->flags |= CCW_FLAG_SLI; |
238 | return rc; | |
239 | } | |
1da177e4 | 240 | |
4d284cac | 241 | static int |
b44b0ab3 SW |
242 | define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, |
243 | unsigned int totrk, int cmd, struct dasd_device *device) | |
1da177e4 | 244 | { |
543691a4 | 245 | struct dasd_eckd_private *private = device->private; |
b44b0ab3 SW |
246 | u32 begcyl, endcyl; |
247 | u16 heads, beghead, endhead; | |
d54853ef | 248 | int rc = 0; |
1da177e4 | 249 | |
1da177e4 LT |
250 | ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; |
251 | ccw->flags = 0; | |
252 | ccw->count = 16; | |
253 | ccw->cda = (__u32) __pa(data); | |
254 | ||
8e09f215 | 255 | memset(data, 0, sizeof(struct DE_eckd_data)); |
1da177e4 LT |
256 | switch (cmd) { |
257 | case DASD_ECKD_CCW_READ_HOME_ADDRESS: | |
258 | case DASD_ECKD_CCW_READ_RECORD_ZERO: | |
259 | case DASD_ECKD_CCW_READ: | |
260 | case DASD_ECKD_CCW_READ_MT: | |
261 | case DASD_ECKD_CCW_READ_CKD: | |
262 | case DASD_ECKD_CCW_READ_CKD_MT: | |
263 | case DASD_ECKD_CCW_READ_KD: | |
264 | case DASD_ECKD_CCW_READ_KD_MT: | |
1da177e4 LT |
265 | data->mask.perm = 0x1; |
266 | data->attributes.operation = private->attrib.operation; | |
267 | break; | |
8fd57520 JH |
268 | case DASD_ECKD_CCW_READ_COUNT: |
269 | data->mask.perm = 0x1; | |
270 | data->attributes.operation = DASD_BYPASS_CACHE; | |
271 | break; | |
1da177e4 LT |
272 | case DASD_ECKD_CCW_WRITE: |
273 | case DASD_ECKD_CCW_WRITE_MT: | |
274 | case DASD_ECKD_CCW_WRITE_KD: | |
275 | case DASD_ECKD_CCW_WRITE_KD_MT: | |
276 | data->mask.perm = 0x02; | |
277 | data->attributes.operation = private->attrib.operation; | |
d54853ef | 278 | rc = check_XRC (ccw, data, device); |
1da177e4 LT |
279 | break; |
280 | case DASD_ECKD_CCW_WRITE_CKD: | |
281 | case DASD_ECKD_CCW_WRITE_CKD_MT: | |
282 | data->attributes.operation = DASD_BYPASS_CACHE; | |
d54853ef | 283 | rc = check_XRC (ccw, data, device); |
1da177e4 LT |
284 | break; |
285 | case DASD_ECKD_CCW_ERASE: | |
286 | case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: | |
287 | case DASD_ECKD_CCW_WRITE_RECORD_ZERO: | |
288 | data->mask.perm = 0x3; | |
289 | data->mask.auth = 0x1; | |
290 | data->attributes.operation = DASD_BYPASS_CACHE; | |
d54853ef | 291 | rc = check_XRC (ccw, data, device); |
1da177e4 LT |
292 | break; |
293 | default: | |
fc19f381 SH |
294 | dev_err(&device->cdev->dev, |
295 | "0x%x is not a known command\n", cmd); | |
1da177e4 LT |
296 | break; |
297 | } | |
298 | ||
299 | data->attributes.mode = 0x3; /* ECKD */ | |
300 | ||
301 | if ((private->rdc_data.cu_type == 0x2105 || | |
302 | private->rdc_data.cu_type == 0x2107 || | |
303 | private->rdc_data.cu_type == 0x1750) | |
304 | && !(private->uses_cdl && trk < 2)) | |
305 | data->ga_extended |= 0x40; /* Regular Data Format Mode */ | |
306 | ||
b44b0ab3 SW |
307 | heads = private->rdc_data.trk_per_cyl; |
308 | begcyl = trk / heads; | |
309 | beghead = trk % heads; | |
310 | endcyl = totrk / heads; | |
311 | endhead = totrk % heads; | |
1da177e4 LT |
312 | |
313 | /* check for sequential prestage - enhance cylinder range */ | |
314 | if (data->attributes.operation == DASD_SEQ_PRESTAGE || | |
315 | data->attributes.operation == DASD_SEQ_ACCESS) { | |
138c014d | 316 | |
b44b0ab3 SW |
317 | if (endcyl + private->attrib.nr_cyl < private->real_cyl) |
318 | endcyl += private->attrib.nr_cyl; | |
1da177e4 | 319 | else |
b44b0ab3 | 320 | endcyl = (private->real_cyl - 1); |
1da177e4 LT |
321 | } |
322 | ||
b44b0ab3 SW |
323 | set_ch_t(&data->beg_ext, begcyl, beghead); |
324 | set_ch_t(&data->end_ext, endcyl, endhead); | |
d54853ef | 325 | return rc; |
1da177e4 LT |
326 | } |
327 | ||
8e09f215 SW |
328 | static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata, |
329 | struct dasd_device *device) | |
330 | { | |
543691a4 | 331 | struct dasd_eckd_private *private = device->private; |
8e09f215 SW |
332 | int rc; |
333 | ||
8e09f215 SW |
334 | if (!private->rdc_data.facilities.XRC_supported) |
335 | return 0; | |
336 | ||
337 | /* switch on System Time Stamp - needed for XRC Support */ | |
f3eb5384 SW |
338 | pfxdata->define_extent.ga_extended |= 0x08; /* 'Time Stamp Valid' */ |
339 | pfxdata->define_extent.ga_extended |= 0x02; /* 'Extended Parameter' */ | |
8e09f215 SW |
340 | pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ |
341 | ||
f3eb5384 | 342 | rc = get_sync_clock(&pfxdata->define_extent.ep_sys_time); |
8e09f215 | 343 | /* Ignore return code if sync clock is switched off. */ |
a8f6db4d | 344 | if (rc == -EOPNOTSUPP || rc == -EACCES) |
8e09f215 SW |
345 | rc = 0; |
346 | return rc; | |
347 | } | |
348 | ||
f3eb5384 SW |
349 | static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk, |
350 | unsigned int rec_on_trk, int count, int cmd, | |
351 | struct dasd_device *device, unsigned int reclen, | |
352 | unsigned int tlf) | |
353 | { | |
543691a4 | 354 | struct dasd_eckd_private *private = device->private; |
f3eb5384 SW |
355 | int sector; |
356 | int dn, d; | |
357 | ||
f3eb5384 SW |
358 | memset(data, 0, sizeof(*data)); |
359 | sector = 0; | |
360 | if (rec_on_trk) { | |
361 | switch (private->rdc_data.dev_type) { | |
362 | case 0x3390: | |
363 | dn = ceil_quot(reclen + 6, 232); | |
364 | d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); | |
365 | sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; | |
366 | break; | |
367 | case 0x3380: | |
368 | d = 7 + ceil_quot(reclen + 12, 32); | |
369 | sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; | |
370 | break; | |
371 | } | |
372 | } | |
373 | data->sector = sector; | |
374 | /* note: meaning of count depends on the operation | |
375 | * for record based I/O it's the number of records, but for | |
376 | * track based I/O it's the number of tracks | |
377 | */ | |
378 | data->count = count; | |
379 | switch (cmd) { | |
380 | case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: | |
381 | data->operation.orientation = 0x3; | |
382 | data->operation.operation = 0x03; | |
383 | break; | |
384 | case DASD_ECKD_CCW_READ_HOME_ADDRESS: | |
385 | data->operation.orientation = 0x3; | |
386 | data->operation.operation = 0x16; | |
387 | break; | |
388 | case DASD_ECKD_CCW_WRITE_RECORD_ZERO: | |
389 | data->operation.orientation = 0x1; | |
390 | data->operation.operation = 0x03; | |
391 | data->count++; | |
392 | break; | |
393 | case DASD_ECKD_CCW_READ_RECORD_ZERO: | |
394 | data->operation.orientation = 0x3; | |
395 | data->operation.operation = 0x16; | |
396 | data->count++; | |
397 | break; | |
398 | case DASD_ECKD_CCW_WRITE: | |
399 | case DASD_ECKD_CCW_WRITE_MT: | |
400 | case DASD_ECKD_CCW_WRITE_KD: | |
401 | case DASD_ECKD_CCW_WRITE_KD_MT: | |
402 | data->auxiliary.length_valid = 0x1; | |
403 | data->length = reclen; | |
404 | data->operation.operation = 0x01; | |
405 | break; | |
406 | case DASD_ECKD_CCW_WRITE_CKD: | |
407 | case DASD_ECKD_CCW_WRITE_CKD_MT: | |
408 | data->auxiliary.length_valid = 0x1; | |
409 | data->length = reclen; | |
410 | data->operation.operation = 0x03; | |
411 | break; | |
e4dbb0f2 SH |
412 | case DASD_ECKD_CCW_WRITE_FULL_TRACK: |
413 | data->operation.orientation = 0x0; | |
414 | data->operation.operation = 0x3F; | |
415 | data->extended_operation = 0x11; | |
416 | data->length = 0; | |
417 | data->extended_parameter_length = 0x02; | |
418 | if (data->count > 8) { | |
419 | data->extended_parameter[0] = 0xFF; | |
420 | data->extended_parameter[1] = 0xFF; | |
421 | data->extended_parameter[1] <<= (16 - count); | |
422 | } else { | |
423 | data->extended_parameter[0] = 0xFF; | |
424 | data->extended_parameter[0] <<= (8 - count); | |
425 | data->extended_parameter[1] = 0x00; | |
426 | } | |
427 | data->sector = 0xFF; | |
428 | break; | |
f3eb5384 SW |
429 | case DASD_ECKD_CCW_WRITE_TRACK_DATA: |
430 | data->auxiliary.length_valid = 0x1; | |
431 | data->length = reclen; /* not tlf, as one might think */ | |
432 | data->operation.operation = 0x3F; | |
433 | data->extended_operation = 0x23; | |
434 | break; | |
435 | case DASD_ECKD_CCW_READ: | |
436 | case DASD_ECKD_CCW_READ_MT: | |
437 | case DASD_ECKD_CCW_READ_KD: | |
438 | case DASD_ECKD_CCW_READ_KD_MT: | |
439 | data->auxiliary.length_valid = 0x1; | |
440 | data->length = reclen; | |
441 | data->operation.operation = 0x06; | |
442 | break; | |
443 | case DASD_ECKD_CCW_READ_CKD: | |
444 | case DASD_ECKD_CCW_READ_CKD_MT: | |
445 | data->auxiliary.length_valid = 0x1; | |
446 | data->length = reclen; | |
447 | data->operation.operation = 0x16; | |
448 | break; | |
449 | case DASD_ECKD_CCW_READ_COUNT: | |
450 | data->operation.operation = 0x06; | |
451 | break; | |
e4dbb0f2 SH |
452 | case DASD_ECKD_CCW_READ_TRACK: |
453 | data->operation.orientation = 0x1; | |
454 | data->operation.operation = 0x0C; | |
455 | data->extended_parameter_length = 0; | |
456 | data->sector = 0xFF; | |
457 | break; | |
f3eb5384 SW |
458 | case DASD_ECKD_CCW_READ_TRACK_DATA: |
459 | data->auxiliary.length_valid = 0x1; | |
460 | data->length = tlf; | |
461 | data->operation.operation = 0x0C; | |
462 | break; | |
463 | case DASD_ECKD_CCW_ERASE: | |
464 | data->length = reclen; | |
465 | data->auxiliary.length_valid = 0x1; | |
466 | data->operation.operation = 0x0b; | |
467 | break; | |
468 | default: | |
469 | DBF_DEV_EVENT(DBF_ERR, device, | |
470 | "fill LRE unknown opcode 0x%x", cmd); | |
471 | BUG(); | |
472 | } | |
473 | set_ch_t(&data->seek_addr, | |
474 | trk / private->rdc_data.trk_per_cyl, | |
475 | trk % private->rdc_data.trk_per_cyl); | |
476 | data->search_arg.cyl = data->seek_addr.cyl; | |
477 | data->search_arg.head = data->seek_addr.head; | |
478 | data->search_arg.record = rec_on_trk; | |
479 | } | |
480 | ||
481 | static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, | |
482 | unsigned int trk, unsigned int totrk, int cmd, | |
483 | struct dasd_device *basedev, struct dasd_device *startdev, | |
484 | unsigned char format, unsigned int rec_on_trk, int count, | |
485 | unsigned int blksize, unsigned int tlf) | |
8e09f215 SW |
486 | { |
487 | struct dasd_eckd_private *basepriv, *startpriv; | |
f3eb5384 SW |
488 | struct DE_eckd_data *dedata; |
489 | struct LRE_eckd_data *lredata; | |
b44b0ab3 SW |
490 | u32 begcyl, endcyl; |
491 | u16 heads, beghead, endhead; | |
8e09f215 SW |
492 | int rc = 0; |
493 | ||
543691a4 SO |
494 | basepriv = basedev->private; |
495 | startpriv = startdev->private; | |
f3eb5384 SW |
496 | dedata = &pfxdata->define_extent; |
497 | lredata = &pfxdata->locate_record; | |
8e09f215 SW |
498 | |
499 | ccw->cmd_code = DASD_ECKD_CCW_PFX; | |
500 | ccw->flags = 0; | |
e4dbb0f2 SH |
501 | if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) { |
502 | ccw->count = sizeof(*pfxdata) + 2; | |
503 | ccw->cda = (__u32) __pa(pfxdata); | |
504 | memset(pfxdata, 0, sizeof(*pfxdata) + 2); | |
505 | } else { | |
506 | ccw->count = sizeof(*pfxdata); | |
507 | ccw->cda = (__u32) __pa(pfxdata); | |
508 | memset(pfxdata, 0, sizeof(*pfxdata)); | |
509 | } | |
8e09f215 | 510 | |
8e09f215 | 511 | /* prefix data */ |
f3eb5384 SW |
512 | if (format > 1) { |
513 | DBF_DEV_EVENT(DBF_ERR, basedev, | |
514 | "PFX LRE unknown format 0x%x", format); | |
515 | BUG(); | |
516 | return -EINVAL; | |
517 | } | |
518 | pfxdata->format = format; | |
4abb08c2 SW |
519 | pfxdata->base_address = basepriv->ned->unit_addr; |
520 | pfxdata->base_lss = basepriv->ned->ID; | |
f3eb5384 | 521 | pfxdata->validity.define_extent = 1; |
8e09f215 SW |
522 | |
523 | /* private uid is kept up to date, conf_data may be outdated */ | |
524 | if (startpriv->uid.type != UA_BASE_DEVICE) { | |
525 | pfxdata->validity.verify_base = 1; | |
526 | if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) | |
527 | pfxdata->validity.hyper_pav = 1; | |
528 | } | |
529 | ||
530 | /* define extend data (mostly)*/ | |
531 | switch (cmd) { | |
532 | case DASD_ECKD_CCW_READ_HOME_ADDRESS: | |
533 | case DASD_ECKD_CCW_READ_RECORD_ZERO: | |
534 | case DASD_ECKD_CCW_READ: | |
535 | case DASD_ECKD_CCW_READ_MT: | |
536 | case DASD_ECKD_CCW_READ_CKD: | |
537 | case DASD_ECKD_CCW_READ_CKD_MT: | |
538 | case DASD_ECKD_CCW_READ_KD: | |
539 | case DASD_ECKD_CCW_READ_KD_MT: | |
f3eb5384 SW |
540 | dedata->mask.perm = 0x1; |
541 | dedata->attributes.operation = basepriv->attrib.operation; | |
542 | break; | |
8fd57520 JH |
543 | case DASD_ECKD_CCW_READ_COUNT: |
544 | dedata->mask.perm = 0x1; | |
545 | dedata->attributes.operation = DASD_BYPASS_CACHE; | |
546 | break; | |
e4dbb0f2 | 547 | case DASD_ECKD_CCW_READ_TRACK: |
f3eb5384 SW |
548 | case DASD_ECKD_CCW_READ_TRACK_DATA: |
549 | dedata->mask.perm = 0x1; | |
550 | dedata->attributes.operation = basepriv->attrib.operation; | |
551 | dedata->blk_size = 0; | |
8e09f215 SW |
552 | break; |
553 | case DASD_ECKD_CCW_WRITE: | |
554 | case DASD_ECKD_CCW_WRITE_MT: | |
555 | case DASD_ECKD_CCW_WRITE_KD: | |
556 | case DASD_ECKD_CCW_WRITE_KD_MT: | |
f3eb5384 SW |
557 | dedata->mask.perm = 0x02; |
558 | dedata->attributes.operation = basepriv->attrib.operation; | |
8e09f215 SW |
559 | rc = check_XRC_on_prefix(pfxdata, basedev); |
560 | break; | |
561 | case DASD_ECKD_CCW_WRITE_CKD: | |
562 | case DASD_ECKD_CCW_WRITE_CKD_MT: | |
f3eb5384 | 563 | dedata->attributes.operation = DASD_BYPASS_CACHE; |
8e09f215 SW |
564 | rc = check_XRC_on_prefix(pfxdata, basedev); |
565 | break; | |
566 | case DASD_ECKD_CCW_ERASE: | |
567 | case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: | |
568 | case DASD_ECKD_CCW_WRITE_RECORD_ZERO: | |
f3eb5384 SW |
569 | dedata->mask.perm = 0x3; |
570 | dedata->mask.auth = 0x1; | |
571 | dedata->attributes.operation = DASD_BYPASS_CACHE; | |
8e09f215 SW |
572 | rc = check_XRC_on_prefix(pfxdata, basedev); |
573 | break; | |
e4dbb0f2 SH |
574 | case DASD_ECKD_CCW_WRITE_FULL_TRACK: |
575 | dedata->mask.perm = 0x03; | |
576 | dedata->attributes.operation = basepriv->attrib.operation; | |
577 | dedata->blk_size = 0; | |
578 | break; | |
f3eb5384 SW |
579 | case DASD_ECKD_CCW_WRITE_TRACK_DATA: |
580 | dedata->mask.perm = 0x02; | |
581 | dedata->attributes.operation = basepriv->attrib.operation; | |
582 | dedata->blk_size = blksize; | |
583 | rc = check_XRC_on_prefix(pfxdata, basedev); | |
8e09f215 | 584 | break; |
f3eb5384 SW |
585 | default: |
586 | DBF_DEV_EVENT(DBF_ERR, basedev, | |
587 | "PFX LRE unknown opcode 0x%x", cmd); | |
588 | BUG(); | |
589 | return -EINVAL; | |
8e09f215 SW |
590 | } |
591 | ||
f3eb5384 | 592 | dedata->attributes.mode = 0x3; /* ECKD */ |
8e09f215 SW |
593 | |
594 | if ((basepriv->rdc_data.cu_type == 0x2105 || | |
595 | basepriv->rdc_data.cu_type == 0x2107 || | |
596 | basepriv->rdc_data.cu_type == 0x1750) | |
597 | && !(basepriv->uses_cdl && trk < 2)) | |
f3eb5384 | 598 | dedata->ga_extended |= 0x40; /* Regular Data Format Mode */ |
8e09f215 | 599 | |
b44b0ab3 SW |
600 | heads = basepriv->rdc_data.trk_per_cyl; |
601 | begcyl = trk / heads; | |
602 | beghead = trk % heads; | |
603 | endcyl = totrk / heads; | |
604 | endhead = totrk % heads; | |
8e09f215 SW |
605 | |
606 | /* check for sequential prestage - enhance cylinder range */ | |
f3eb5384 SW |
607 | if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || |
608 | dedata->attributes.operation == DASD_SEQ_ACCESS) { | |
8e09f215 | 609 | |
b44b0ab3 SW |
610 | if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) |
611 | endcyl += basepriv->attrib.nr_cyl; | |
8e09f215 | 612 | else |
b44b0ab3 | 613 | endcyl = (basepriv->real_cyl - 1); |
8e09f215 SW |
614 | } |
615 | ||
f3eb5384 SW |
616 | set_ch_t(&dedata->beg_ext, begcyl, beghead); |
617 | set_ch_t(&dedata->end_ext, endcyl, endhead); | |
618 | ||
619 | if (format == 1) { | |
620 | fill_LRE_data(lredata, trk, rec_on_trk, count, cmd, | |
621 | basedev, blksize, tlf); | |
622 | } | |
623 | ||
8e09f215 SW |
624 | return rc; |
625 | } | |
626 | ||
f3eb5384 SW |
627 | static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, |
628 | unsigned int trk, unsigned int totrk, int cmd, | |
629 | struct dasd_device *basedev, struct dasd_device *startdev) | |
630 | { | |
631 | return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev, | |
632 | 0, 0, 0, 0, 0); | |
633 | } | |
634 | ||
4d284cac | 635 | static void |
b44b0ab3 SW |
636 | locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, |
637 | unsigned int rec_on_trk, int no_rec, int cmd, | |
1da177e4 LT |
638 | struct dasd_device * device, int reclen) |
639 | { | |
543691a4 | 640 | struct dasd_eckd_private *private = device->private; |
1da177e4 LT |
641 | int sector; |
642 | int dn, d; | |
138c014d | 643 | |
1da177e4 LT |
644 | DBF_DEV_EVENT(DBF_INFO, device, |
645 | "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", | |
646 | trk, rec_on_trk, no_rec, cmd, reclen); | |
647 | ||
648 | ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; | |
649 | ccw->flags = 0; | |
650 | ccw->count = 16; | |
651 | ccw->cda = (__u32) __pa(data); | |
652 | ||
8e09f215 | 653 | memset(data, 0, sizeof(struct LO_eckd_data)); |
1da177e4 LT |
654 | sector = 0; |
655 | if (rec_on_trk) { | |
656 | switch (private->rdc_data.dev_type) { | |
657 | case 0x3390: | |
658 | dn = ceil_quot(reclen + 6, 232); | |
659 | d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); | |
660 | sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; | |
661 | break; | |
662 | case 0x3380: | |
663 | d = 7 + ceil_quot(reclen + 12, 32); | |
664 | sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; | |
665 | break; | |
666 | } | |
667 | } | |
668 | data->sector = sector; | |
669 | data->count = no_rec; | |
670 | switch (cmd) { | |
671 | case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: | |
672 | data->operation.orientation = 0x3; | |
673 | data->operation.operation = 0x03; | |
674 | break; | |
675 | case DASD_ECKD_CCW_READ_HOME_ADDRESS: | |
676 | data->operation.orientation = 0x3; | |
677 | data->operation.operation = 0x16; | |
678 | break; | |
679 | case DASD_ECKD_CCW_WRITE_RECORD_ZERO: | |
680 | data->operation.orientation = 0x1; | |
681 | data->operation.operation = 0x03; | |
682 | data->count++; | |
683 | break; | |
684 | case DASD_ECKD_CCW_READ_RECORD_ZERO: | |
685 | data->operation.orientation = 0x3; | |
686 | data->operation.operation = 0x16; | |
687 | data->count++; | |
688 | break; | |
689 | case DASD_ECKD_CCW_WRITE: | |
690 | case DASD_ECKD_CCW_WRITE_MT: | |
691 | case DASD_ECKD_CCW_WRITE_KD: | |
692 | case DASD_ECKD_CCW_WRITE_KD_MT: | |
693 | data->auxiliary.last_bytes_used = 0x1; | |
694 | data->length = reclen; | |
695 | data->operation.operation = 0x01; | |
696 | break; | |
697 | case DASD_ECKD_CCW_WRITE_CKD: | |
698 | case DASD_ECKD_CCW_WRITE_CKD_MT: | |
699 | data->auxiliary.last_bytes_used = 0x1; | |
700 | data->length = reclen; | |
701 | data->operation.operation = 0x03; | |
702 | break; | |
703 | case DASD_ECKD_CCW_READ: | |
704 | case DASD_ECKD_CCW_READ_MT: | |
705 | case DASD_ECKD_CCW_READ_KD: | |
706 | case DASD_ECKD_CCW_READ_KD_MT: | |
707 | data->auxiliary.last_bytes_used = 0x1; | |
708 | data->length = reclen; | |
709 | data->operation.operation = 0x06; | |
710 | break; | |
711 | case DASD_ECKD_CCW_READ_CKD: | |
712 | case DASD_ECKD_CCW_READ_CKD_MT: | |
713 | data->auxiliary.last_bytes_used = 0x1; | |
714 | data->length = reclen; | |
715 | data->operation.operation = 0x16; | |
716 | break; | |
717 | case DASD_ECKD_CCW_READ_COUNT: | |
718 | data->operation.operation = 0x06; | |
719 | break; | |
720 | case DASD_ECKD_CCW_ERASE: | |
721 | data->length = reclen; | |
722 | data->auxiliary.last_bytes_used = 0x1; | |
723 | data->operation.operation = 0x0b; | |
724 | break; | |
725 | default: | |
fc19f381 SH |
726 | DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record " |
727 | "opcode 0x%x", cmd); | |
1da177e4 | 728 | } |
b44b0ab3 SW |
729 | set_ch_t(&data->seek_addr, |
730 | trk / private->rdc_data.trk_per_cyl, | |
731 | trk % private->rdc_data.trk_per_cyl); | |
732 | data->search_arg.cyl = data->seek_addr.cyl; | |
733 | data->search_arg.head = data->seek_addr.head; | |
1da177e4 LT |
734 | data->search_arg.record = rec_on_trk; |
735 | } | |
736 | ||
737 | /* | |
738 | * Returns 1 if the block is one of the special blocks that needs | |
739 | * to get read/written with the KD variant of the command. | |
740 | * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and | |
741 | * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. | |
742 | * Luckily the KD variants differ only by one bit (0x08) from the | |
743 | * normal variant. So don't wonder about code like: | |
744 | * if (dasd_eckd_cdl_special(blk_per_trk, recid)) | |
745 | * ccw->cmd_code |= 0x8; | |
746 | */ | |
747 | static inline int | |
748 | dasd_eckd_cdl_special(int blk_per_trk, int recid) | |
749 | { | |
750 | if (recid < 3) | |
751 | return 1; | |
752 | if (recid < blk_per_trk) | |
753 | return 0; | |
754 | if (recid < 2 * blk_per_trk) | |
755 | return 1; | |
756 | return 0; | |
757 | } | |
758 | ||
759 | /* | |
760 | * Returns the record size for the special blocks of the cdl format. | |
761 | * Only returns something useful if dasd_eckd_cdl_special is true | |
762 | * for the recid. | |
763 | */ | |
764 | static inline int | |
765 | dasd_eckd_cdl_reclen(int recid) | |
766 | { | |
767 | if (recid < 3) | |
768 | return sizes_trk0[recid]; | |
769 | return LABEL_SIZE; | |
770 | } | |
b206181d SH |
771 | /* create unique id from private structure. */ |
772 | static void create_uid(struct dasd_eckd_private *private) | |
3d052595 | 773 | { |
4abb08c2 | 774 | int count; |
b206181d | 775 | struct dasd_uid *uid; |
3d052595 | 776 | |
2dedf0d9 | 777 | uid = &private->uid; |
3d052595 | 778 | memset(uid, 0, sizeof(struct dasd_uid)); |
4abb08c2 | 779 | memcpy(uid->vendor, private->ned->HDA_manufacturer, |
d0710c7c | 780 | sizeof(uid->vendor) - 1); |
3d052595 | 781 | EBCASC(uid->vendor, sizeof(uid->vendor) - 1); |
4abb08c2 | 782 | memcpy(uid->serial, private->ned->HDA_location, |
d0710c7c | 783 | sizeof(uid->serial) - 1); |
3d052595 | 784 | EBCASC(uid->serial, sizeof(uid->serial) - 1); |
4abb08c2 | 785 | uid->ssid = private->gneq->subsystemID; |
a419aef8 | 786 | uid->real_unit_addr = private->ned->unit_addr; |
4abb08c2 SW |
787 | if (private->sneq) { |
788 | uid->type = private->sneq->sua_flags; | |
8e09f215 | 789 | if (uid->type == UA_BASE_PAV_ALIAS) |
4abb08c2 | 790 | uid->base_unit_addr = private->sneq->base_unit_addr; |
8e09f215 SW |
791 | } else { |
792 | uid->type = UA_BASE_DEVICE; | |
793 | } | |
4abb08c2 SW |
794 | if (private->vdsneq) { |
795 | for (count = 0; count < 16; count++) { | |
796 | sprintf(uid->vduit+2*count, "%02x", | |
797 | private->vdsneq->uit[count]); | |
798 | } | |
799 | } | |
b206181d SH |
800 | } |
801 | ||
802 | /* | |
803 | * Generate device unique id that specifies the physical device. | |
804 | */ | |
805 | static int dasd_eckd_generate_uid(struct dasd_device *device) | |
806 | { | |
543691a4 | 807 | struct dasd_eckd_private *private = device->private; |
b206181d SH |
808 | unsigned long flags; |
809 | ||
b206181d SH |
810 | if (!private) |
811 | return -ENODEV; | |
812 | if (!private->ned || !private->gneq) | |
813 | return -ENODEV; | |
814 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); | |
815 | create_uid(private); | |
2dedf0d9 | 816 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
3d052595 HH |
817 | return 0; |
818 | } | |
819 | ||
2dedf0d9 SH |
820 | static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid) |
821 | { | |
543691a4 | 822 | struct dasd_eckd_private *private = device->private; |
2dedf0d9 SH |
823 | unsigned long flags; |
824 | ||
543691a4 | 825 | if (private) { |
2dedf0d9 SH |
826 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); |
827 | *uid = private->uid; | |
828 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); | |
829 | return 0; | |
830 | } | |
831 | return -EINVAL; | |
832 | } | |
833 | ||
b206181d SH |
834 | /* |
835 | * compare device UID with data of a given dasd_eckd_private structure | |
836 | * return 0 for match | |
837 | */ | |
838 | static int dasd_eckd_compare_path_uid(struct dasd_device *device, | |
839 | struct dasd_eckd_private *private) | |
840 | { | |
841 | struct dasd_uid device_uid; | |
842 | ||
843 | create_uid(private); | |
844 | dasd_eckd_get_uid(device, &device_uid); | |
845 | ||
846 | return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid)); | |
847 | } | |
848 | ||
a4d26c6a SW |
849 | static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device, |
850 | struct dasd_ccw_req *cqr, | |
851 | __u8 *rcd_buffer, | |
852 | __u8 lpm) | |
17283b56 | 853 | { |
17283b56 | 854 | struct ccw1 *ccw; |
a4d26c6a SW |
855 | /* |
856 | * buffer has to start with EBCDIC "V1.0" to show | |
857 | * support for virtual device SNEQ | |
858 | */ | |
859 | rcd_buffer[0] = 0xE5; | |
860 | rcd_buffer[1] = 0xF1; | |
861 | rcd_buffer[2] = 0x4B; | |
862 | rcd_buffer[3] = 0xF0; | |
17283b56 CH |
863 | |
864 | ccw = cqr->cpaddr; | |
a4d26c6a SW |
865 | ccw->cmd_code = DASD_ECKD_CCW_RCD; |
866 | ccw->flags = 0; | |
17283b56 | 867 | ccw->cda = (__u32)(addr_t)rcd_buffer; |
a4d26c6a SW |
868 | ccw->count = DASD_ECKD_RCD_DATA_SIZE; |
869 | cqr->magic = DASD_ECKD_MAGIC; | |
17283b56 | 870 | |
8e09f215 SW |
871 | cqr->startdev = device; |
872 | cqr->memdev = device; | |
873 | cqr->block = NULL; | |
17283b56 CH |
874 | cqr->expires = 10*HZ; |
875 | cqr->lpm = lpm; | |
eb6e199b | 876 | cqr->retries = 256; |
1aae0560 | 877 | cqr->buildclk = get_tod_clock(); |
17283b56 | 878 | cqr->status = DASD_CQR_FILLED; |
a4d26c6a SW |
879 | set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); |
880 | } | |
881 | ||
5915a873 SH |
882 | /* |
883 | * Wakeup helper for read_conf | |
884 | * if the cqr is not done and needs some error recovery | |
885 | * the buffer has to be re-initialized with the EBCDIC "V1.0" | |
886 | * to show support for virtual device SNEQ | |
887 | */ | |
888 | static void read_conf_cb(struct dasd_ccw_req *cqr, void *data) | |
889 | { | |
890 | struct ccw1 *ccw; | |
891 | __u8 *rcd_buffer; | |
892 | ||
893 | if (cqr->status != DASD_CQR_DONE) { | |
894 | ccw = cqr->cpaddr; | |
895 | rcd_buffer = (__u8 *)((addr_t) ccw->cda); | |
896 | memset(rcd_buffer, 0, sizeof(*rcd_buffer)); | |
897 | ||
898 | rcd_buffer[0] = 0xE5; | |
899 | rcd_buffer[1] = 0xF1; | |
900 | rcd_buffer[2] = 0x4B; | |
901 | rcd_buffer[3] = 0xF0; | |
902 | } | |
903 | dasd_wakeup_cb(cqr, data); | |
904 | } | |
905 | ||
a4d26c6a SW |
906 | static int dasd_eckd_read_conf_immediately(struct dasd_device *device, |
907 | struct dasd_ccw_req *cqr, | |
908 | __u8 *rcd_buffer, | |
909 | __u8 lpm) | |
910 | { | |
911 | struct ciw *ciw; | |
912 | int rc; | |
913 | /* | |
914 | * sanity check: scan for RCD command in extended SenseID data | |
915 | * some devices do not support RCD | |
916 | */ | |
917 | ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); | |
918 | if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) | |
919 | return -EOPNOTSUPP; | |
920 | ||
921 | dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm); | |
922 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); | |
5a27e60d | 923 | set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); |
a4d26c6a | 924 | cqr->retries = 5; |
5915a873 | 925 | cqr->callback = read_conf_cb; |
a4d26c6a SW |
926 | rc = dasd_sleep_on_immediatly(cqr); |
927 | return rc; | |
17283b56 CH |
928 | } |
929 | ||
930 | static int dasd_eckd_read_conf_lpm(struct dasd_device *device, | |
931 | void **rcd_buffer, | |
932 | int *rcd_buffer_size, __u8 lpm) | |
933 | { | |
934 | struct ciw *ciw; | |
935 | char *rcd_buf = NULL; | |
936 | int ret; | |
937 | struct dasd_ccw_req *cqr; | |
938 | ||
939 | /* | |
a4d26c6a SW |
940 | * sanity check: scan for RCD command in extended SenseID data |
941 | * some devices do not support RCD | |
17283b56 CH |
942 | */ |
943 | ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); | |
a4d26c6a | 944 | if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) { |
17283b56 CH |
945 | ret = -EOPNOTSUPP; |
946 | goto out_error; | |
947 | } | |
a4d26c6a | 948 | rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA); |
17283b56 CH |
949 | if (!rcd_buf) { |
950 | ret = -ENOMEM; | |
951 | goto out_error; | |
952 | } | |
a4d26c6a SW |
953 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, |
954 | 0, /* use rcd_buf as data ara */ | |
955 | device); | |
17283b56 | 956 | if (IS_ERR(cqr)) { |
a4d26c6a SW |
957 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
958 | "Could not allocate RCD request"); | |
959 | ret = -ENOMEM; | |
17283b56 CH |
960 | goto out_error; |
961 | } | |
a4d26c6a | 962 | dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm); |
5915a873 | 963 | cqr->callback = read_conf_cb; |
17283b56 CH |
964 | ret = dasd_sleep_on(cqr); |
965 | /* | |
966 | * on success we update the user input parms | |
967 | */ | |
8e09f215 | 968 | dasd_sfree_request(cqr, cqr->memdev); |
17283b56 CH |
969 | if (ret) |
970 | goto out_error; | |
971 | ||
a4d26c6a | 972 | *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE; |
17283b56 CH |
973 | *rcd_buffer = rcd_buf; |
974 | return 0; | |
975 | out_error: | |
976 | kfree(rcd_buf); | |
977 | *rcd_buffer = NULL; | |
978 | *rcd_buffer_size = 0; | |
979 | return ret; | |
980 | } | |
981 | ||
4abb08c2 SW |
982 | static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) |
983 | { | |
984 | ||
985 | struct dasd_sneq *sneq; | |
986 | int i, count; | |
987 | ||
988 | private->ned = NULL; | |
989 | private->sneq = NULL; | |
990 | private->vdsneq = NULL; | |
991 | private->gneq = NULL; | |
992 | count = private->conf_len / sizeof(struct dasd_sneq); | |
993 | sneq = (struct dasd_sneq *)private->conf_data; | |
994 | for (i = 0; i < count; ++i) { | |
995 | if (sneq->flags.identifier == 1 && sneq->format == 1) | |
996 | private->sneq = sneq; | |
997 | else if (sneq->flags.identifier == 1 && sneq->format == 4) | |
998 | private->vdsneq = (struct vd_sneq *)sneq; | |
999 | else if (sneq->flags.identifier == 2) | |
1000 | private->gneq = (struct dasd_gneq *)sneq; | |
1001 | else if (sneq->flags.identifier == 3 && sneq->res1 == 1) | |
1002 | private->ned = (struct dasd_ned *)sneq; | |
1003 | sneq++; | |
1004 | } | |
1005 | if (!private->ned || !private->gneq) { | |
1006 | private->ned = NULL; | |
1007 | private->sneq = NULL; | |
1008 | private->vdsneq = NULL; | |
1009 | private->gneq = NULL; | |
1010 | return -EINVAL; | |
1011 | } | |
1012 | return 0; | |
1013 | ||
1014 | }; | |
1015 | ||
1016 | static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) | |
1017 | { | |
1018 | struct dasd_gneq *gneq; | |
1019 | int i, count, found; | |
1020 | ||
1021 | count = conf_len / sizeof(*gneq); | |
1022 | gneq = (struct dasd_gneq *)conf_data; | |
1023 | found = 0; | |
1024 | for (i = 0; i < count; ++i) { | |
1025 | if (gneq->flags.identifier == 2) { | |
1026 | found = 1; | |
1027 | break; | |
1028 | } | |
1029 | gneq++; | |
1030 | } | |
1031 | if (found) | |
1032 | return ((char *)gneq)[18] & 0x07; | |
1033 | else | |
1034 | return 0; | |
1035 | } | |
1036 | ||
c7c0c9de SH |
1037 | static void dasd_eckd_clear_conf_data(struct dasd_device *device) |
1038 | { | |
543691a4 | 1039 | struct dasd_eckd_private *private = device->private; |
c7c0c9de SH |
1040 | int i; |
1041 | ||
c7c0c9de SH |
1042 | private->conf_data = NULL; |
1043 | private->conf_len = 0; | |
1044 | for (i = 0; i < 8; i++) { | |
1045 | kfree(private->path_conf_data[i]); | |
1046 | private->path_conf_data[i] = NULL; | |
1047 | } | |
1048 | } | |
1049 | ||
1050 | ||
4abb08c2 | 1051 | static int dasd_eckd_read_conf(struct dasd_device *device) |
1da177e4 LT |
1052 | { |
1053 | void *conf_data; | |
1054 | int conf_len, conf_data_saved; | |
b179b037 | 1055 | int rc, path_err, pos; |
a4d26c6a | 1056 | __u8 lpm, opm; |
b206181d | 1057 | struct dasd_eckd_private *private, path_private; |
a4d26c6a | 1058 | struct dasd_path *path_data; |
b206181d SH |
1059 | struct dasd_uid *uid; |
1060 | char print_path_uid[60], print_device_uid[60]; | |
1da177e4 | 1061 | |
543691a4 | 1062 | private = device->private; |
a4d26c6a SW |
1063 | path_data = &device->path_data; |
1064 | opm = ccw_device_get_path_mask(device->cdev); | |
1da177e4 | 1065 | conf_data_saved = 0; |
55d3a85c | 1066 | path_err = 0; |
1da177e4 LT |
1067 | /* get configuration data per operational path */ |
1068 | for (lpm = 0x80; lpm; lpm>>= 1) { | |
b206181d SH |
1069 | if (!(lpm & opm)) |
1070 | continue; | |
1071 | rc = dasd_eckd_read_conf_lpm(device, &conf_data, | |
1072 | &conf_len, lpm); | |
1073 | if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ | |
1074 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, | |
1075 | "Read configuration data returned " | |
1076 | "error %d", rc); | |
1077 | return rc; | |
1078 | } | |
1079 | if (conf_data == NULL) { | |
1080 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
1081 | "No configuration data " | |
1082 | "retrieved"); | |
1083 | /* no further analysis possible */ | |
1084 | path_data->opm |= lpm; | |
1085 | continue; /* no error */ | |
1086 | } | |
1087 | /* save first valid configuration data */ | |
1088 | if (!conf_data_saved) { | |
c7c0c9de SH |
1089 | /* initially clear previously stored conf_data */ |
1090 | dasd_eckd_clear_conf_data(device); | |
b206181d SH |
1091 | private->conf_data = conf_data; |
1092 | private->conf_len = conf_len; | |
1093 | if (dasd_eckd_identify_conf_parts(private)) { | |
1094 | private->conf_data = NULL; | |
1095 | private->conf_len = 0; | |
1096 | kfree(conf_data); | |
1097 | continue; | |
1da177e4 | 1098 | } |
c7c0c9de SH |
1099 | pos = pathmask_to_pos(lpm); |
1100 | /* store per path conf_data */ | |
1101 | private->path_conf_data[pos] = | |
1102 | (struct dasd_conf_data *) conf_data; | |
b206181d SH |
1103 | /* |
1104 | * build device UID that other path data | |
1105 | * can be compared to it | |
1106 | */ | |
1107 | dasd_eckd_generate_uid(device); | |
1108 | conf_data_saved++; | |
1109 | } else { | |
1110 | path_private.conf_data = conf_data; | |
1111 | path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; | |
1112 | if (dasd_eckd_identify_conf_parts( | |
1113 | &path_private)) { | |
1114 | path_private.conf_data = NULL; | |
1115 | path_private.conf_len = 0; | |
1116 | kfree(conf_data); | |
1117 | continue; | |
1da177e4 | 1118 | } |
b206181d SH |
1119 | if (dasd_eckd_compare_path_uid( |
1120 | device, &path_private)) { | |
1121 | uid = &path_private.uid; | |
1122 | if (strlen(uid->vduit) > 0) | |
1123 | snprintf(print_path_uid, | |
1124 | sizeof(print_path_uid), | |
1125 | "%s.%s.%04x.%02x.%s", | |
1126 | uid->vendor, uid->serial, | |
1127 | uid->ssid, uid->real_unit_addr, | |
1128 | uid->vduit); | |
1129 | else | |
1130 | snprintf(print_path_uid, | |
1131 | sizeof(print_path_uid), | |
1132 | "%s.%s.%04x.%02x", | |
1133 | uid->vendor, uid->serial, | |
1134 | uid->ssid, | |
1135 | uid->real_unit_addr); | |
1136 | uid = &private->uid; | |
1137 | if (strlen(uid->vduit) > 0) | |
1138 | snprintf(print_device_uid, | |
1139 | sizeof(print_device_uid), | |
1140 | "%s.%s.%04x.%02x.%s", | |
1141 | uid->vendor, uid->serial, | |
1142 | uid->ssid, uid->real_unit_addr, | |
1143 | uid->vduit); | |
1144 | else | |
1145 | snprintf(print_device_uid, | |
1146 | sizeof(print_device_uid), | |
1147 | "%s.%s.%04x.%02x", | |
1148 | uid->vendor, uid->serial, | |
1149 | uid->ssid, | |
1150 | uid->real_unit_addr); | |
1151 | dev_err(&device->cdev->dev, | |
1152 | "Not all channel paths lead to " | |
1153 | "the same device, path %02X leads to " | |
1154 | "device %s instead of %s\n", lpm, | |
1155 | print_path_uid, print_device_uid); | |
55d3a85c | 1156 | path_err = -EINVAL; |
5db8440c | 1157 | path_data->cablepm |= lpm; |
55d3a85c | 1158 | continue; |
1da177e4 | 1159 | } |
c7c0c9de SH |
1160 | pos = pathmask_to_pos(lpm); |
1161 | /* store per path conf_data */ | |
1162 | private->path_conf_data[pos] = | |
1163 | (struct dasd_conf_data *) conf_data; | |
b206181d SH |
1164 | path_private.conf_data = NULL; |
1165 | path_private.conf_len = 0; | |
1166 | } | |
1167 | switch (dasd_eckd_path_access(conf_data, conf_len)) { | |
1168 | case 0x02: | |
1169 | path_data->npm |= lpm; | |
1170 | break; | |
1171 | case 0x03: | |
1172 | path_data->ppm |= lpm; | |
1173 | break; | |
1da177e4 | 1174 | } |
ccc0e7dc SH |
1175 | if (!path_data->opm) { |
1176 | path_data->opm = lpm; | |
1177 | dasd_generic_path_operational(device); | |
1178 | } else { | |
1179 | path_data->opm |= lpm; | |
1180 | } | |
5db8440c SH |
1181 | /* |
1182 | * if the path is used | |
1183 | * it should not be in one of the negative lists | |
1184 | */ | |
1185 | path_data->cablepm &= ~lpm; | |
1186 | path_data->hpfpm &= ~lpm; | |
1187 | path_data->cuirpm &= ~lpm; | |
1da177e4 | 1188 | } |
b206181d | 1189 | |
55d3a85c | 1190 | return path_err; |
1da177e4 LT |
1191 | } |
1192 | ||
a4d26c6a SW |
1193 | static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) |
1194 | { | |
543691a4 | 1195 | struct dasd_eckd_private *private = device->private; |
a4d26c6a SW |
1196 | int mdc; |
1197 | u32 fcx_max_data; | |
1198 | ||
a4d26c6a SW |
1199 | if (private->fcx_max_data) { |
1200 | mdc = ccw_device_get_mdc(device->cdev, lpm); | |
1201 | if ((mdc < 0)) { | |
1202 | dev_warn(&device->cdev->dev, | |
1203 | "Detecting the maximum data size for zHPF " | |
1204 | "requests failed (rc=%d) for a new path %x\n", | |
1205 | mdc, lpm); | |
1206 | return mdc; | |
1207 | } | |
1208 | fcx_max_data = mdc * FCX_MAX_DATA_FACTOR; | |
1209 | if (fcx_max_data < private->fcx_max_data) { | |
1210 | dev_warn(&device->cdev->dev, | |
1211 | "The maximum data size for zHPF requests %u " | |
1212 | "on a new path %x is below the active maximum " | |
1213 | "%u\n", fcx_max_data, lpm, | |
1214 | private->fcx_max_data); | |
1215 | return -EACCES; | |
1216 | } | |
1217 | } | |
1218 | return 0; | |
1219 | } | |
1220 | ||
b206181d SH |
1221 | static int rebuild_device_uid(struct dasd_device *device, |
1222 | struct path_verification_work_data *data) | |
1223 | { | |
543691a4 SO |
1224 | struct dasd_eckd_private *private = device->private; |
1225 | struct dasd_path *path_data = &device->path_data; | |
1226 | __u8 lpm, opm = path_data->opm; | |
1227 | int rc = -ENODEV; | |
b206181d SH |
1228 | |
1229 | for (lpm = 0x80; lpm; lpm >>= 1) { | |
1230 | if (!(lpm & opm)) | |
1231 | continue; | |
1232 | memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); | |
1233 | memset(&data->cqr, 0, sizeof(data->cqr)); | |
1234 | data->cqr.cpaddr = &data->ccw; | |
1235 | rc = dasd_eckd_read_conf_immediately(device, &data->cqr, | |
1236 | data->rcd_buffer, | |
1237 | lpm); | |
1238 | ||
1239 | if (rc) { | |
1240 | if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */ | |
1241 | continue; | |
1242 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, | |
1243 | "Read configuration data " | |
1244 | "returned error %d", rc); | |
1245 | break; | |
1246 | } | |
1247 | memcpy(private->conf_data, data->rcd_buffer, | |
1248 | DASD_ECKD_RCD_DATA_SIZE); | |
1249 | if (dasd_eckd_identify_conf_parts(private)) { | |
1250 | rc = -ENODEV; | |
1251 | } else /* first valid path is enough */ | |
1252 | break; | |
1253 | } | |
1254 | ||
1255 | if (!rc) | |
1256 | rc = dasd_eckd_generate_uid(device); | |
1257 | ||
1258 | return rc; | |
1259 | } | |
1260 | ||
a4d26c6a SW |
1261 | static void do_path_verification_work(struct work_struct *work) |
1262 | { | |
1263 | struct path_verification_work_data *data; | |
1264 | struct dasd_device *device; | |
b206181d SH |
1265 | struct dasd_eckd_private path_private; |
1266 | struct dasd_uid *uid; | |
1267 | __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; | |
5db8440c | 1268 | __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm; |
a4d26c6a | 1269 | unsigned long flags; |
b206181d | 1270 | char print_uid[60]; |
a4d26c6a SW |
1271 | int rc; |
1272 | ||
1273 | data = container_of(work, struct path_verification_work_data, worker); | |
1274 | device = data->device; | |
1275 | ||
c8d1c0ff SH |
1276 | /* delay path verification until device was resumed */ |
1277 | if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { | |
1278 | schedule_work(work); | |
1279 | return; | |
1280 | } | |
1eb38023 SH |
1281 | /* check if path verification already running and delay if so */ |
1282 | if (test_and_set_bit(DASD_FLAG_PATH_VERIFY, &device->flags)) { | |
1283 | schedule_work(work); | |
1284 | return; | |
1285 | } | |
a4d26c6a SW |
1286 | opm = 0; |
1287 | npm = 0; | |
1288 | ppm = 0; | |
1289 | epm = 0; | |
5db8440c SH |
1290 | hpfpm = 0; |
1291 | cablepm = 0; | |
1292 | ||
a4d26c6a | 1293 | for (lpm = 0x80; lpm; lpm >>= 1) { |
b206181d SH |
1294 | if (!(lpm & data->tbvpm)) |
1295 | continue; | |
1296 | memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); | |
1297 | memset(&data->cqr, 0, sizeof(data->cqr)); | |
1298 | data->cqr.cpaddr = &data->ccw; | |
1299 | rc = dasd_eckd_read_conf_immediately(device, &data->cqr, | |
1300 | data->rcd_buffer, | |
1301 | lpm); | |
1302 | if (!rc) { | |
1303 | switch (dasd_eckd_path_access(data->rcd_buffer, | |
1304 | DASD_ECKD_RCD_DATA_SIZE) | |
1305 | ) { | |
1306 | case 0x02: | |
1307 | npm |= lpm; | |
1308 | break; | |
1309 | case 0x03: | |
1310 | ppm |= lpm; | |
1311 | break; | |
1312 | } | |
1313 | opm |= lpm; | |
1314 | } else if (rc == -EOPNOTSUPP) { | |
1315 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
1316 | "path verification: No configuration " | |
1317 | "data retrieved"); | |
1318 | opm |= lpm; | |
1319 | } else if (rc == -EAGAIN) { | |
1320 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
a4d26c6a SW |
1321 | "path verification: device is stopped," |
1322 | " try again later"); | |
b206181d SH |
1323 | epm |= lpm; |
1324 | } else { | |
1325 | dev_warn(&device->cdev->dev, | |
1326 | "Reading device feature codes failed " | |
1327 | "(rc=%d) for new path %x\n", rc, lpm); | |
1328 | continue; | |
1329 | } | |
1330 | if (verify_fcx_max_data(device, lpm)) { | |
1331 | opm &= ~lpm; | |
1332 | npm &= ~lpm; | |
1333 | ppm &= ~lpm; | |
5db8440c | 1334 | hpfpm |= lpm; |
b206181d SH |
1335 | continue; |
1336 | } | |
1337 | ||
1338 | /* | |
1339 | * save conf_data for comparison after | |
1340 | * rebuild_device_uid may have changed | |
1341 | * the original data | |
1342 | */ | |
1343 | memcpy(&path_rcd_buf, data->rcd_buffer, | |
1344 | DASD_ECKD_RCD_DATA_SIZE); | |
1345 | path_private.conf_data = (void *) &path_rcd_buf; | |
1346 | path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; | |
1347 | if (dasd_eckd_identify_conf_parts(&path_private)) { | |
1348 | path_private.conf_data = NULL; | |
1349 | path_private.conf_len = 0; | |
1350 | continue; | |
1351 | } | |
1352 | ||
1353 | /* | |
1354 | * compare path UID with device UID only if at least | |
1355 | * one valid path is left | |
1356 | * in other case the device UID may have changed and | |
1357 | * the first working path UID will be used as device UID | |
1358 | */ | |
1359 | if (device->path_data.opm && | |
1360 | dasd_eckd_compare_path_uid(device, &path_private)) { | |
1361 | /* | |
1362 | * the comparison was not successful | |
1363 | * rebuild the device UID with at least one | |
1364 | * known path in case a z/VM hyperswap command | |
1365 | * has changed the device | |
1366 | * | |
1367 | * after this compare again | |
1368 | * | |
1369 | * if either the rebuild or the recompare fails | |
1370 | * the path can not be used | |
1371 | */ | |
1372 | if (rebuild_device_uid(device, data) || | |
1373 | dasd_eckd_compare_path_uid( | |
1374 | device, &path_private)) { | |
1375 | uid = &path_private.uid; | |
1376 | if (strlen(uid->vduit) > 0) | |
1377 | snprintf(print_uid, sizeof(print_uid), | |
1378 | "%s.%s.%04x.%02x.%s", | |
1379 | uid->vendor, uid->serial, | |
1380 | uid->ssid, uid->real_unit_addr, | |
1381 | uid->vduit); | |
1382 | else | |
1383 | snprintf(print_uid, sizeof(print_uid), | |
1384 | "%s.%s.%04x.%02x", | |
1385 | uid->vendor, uid->serial, | |
1386 | uid->ssid, | |
1387 | uid->real_unit_addr); | |
1388 | dev_err(&device->cdev->dev, | |
1389 | "The newly added channel path %02X " | |
1390 | "will not be used because it leads " | |
1391 | "to a different device %s\n", | |
1392 | lpm, print_uid); | |
a4d26c6a SW |
1393 | opm &= ~lpm; |
1394 | npm &= ~lpm; | |
1395 | ppm &= ~lpm; | |
5db8440c | 1396 | cablepm |= lpm; |
b206181d | 1397 | continue; |
a4d26c6a SW |
1398 | } |
1399 | } | |
b206181d SH |
1400 | |
1401 | /* | |
1402 | * There is a small chance that a path is lost again between | |
1403 | * above path verification and the following modification of | |
1404 | * the device opm mask. We could avoid that race here by using | |
1405 | * yet another path mask, but we rather deal with this unlikely | |
1406 | * situation in dasd_start_IO. | |
1407 | */ | |
1408 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); | |
1409 | if (!device->path_data.opm && opm) { | |
1410 | device->path_data.opm = opm; | |
5db8440c SH |
1411 | device->path_data.cablepm &= ~opm; |
1412 | device->path_data.cuirpm &= ~opm; | |
1413 | device->path_data.hpfpm &= ~opm; | |
b206181d | 1414 | dasd_generic_path_operational(device); |
5db8440c | 1415 | } else { |
b206181d | 1416 | device->path_data.opm |= opm; |
5db8440c SH |
1417 | device->path_data.cablepm &= ~opm; |
1418 | device->path_data.cuirpm &= ~opm; | |
1419 | device->path_data.hpfpm &= ~opm; | |
1420 | } | |
b206181d SH |
1421 | device->path_data.npm |= npm; |
1422 | device->path_data.ppm |= ppm; | |
1423 | device->path_data.tbvpm |= epm; | |
5db8440c SH |
1424 | device->path_data.cablepm |= cablepm; |
1425 | device->path_data.hpfpm |= hpfpm; | |
b206181d | 1426 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
a4d26c6a | 1427 | } |
1eb38023 | 1428 | clear_bit(DASD_FLAG_PATH_VERIFY, &device->flags); |
a4d26c6a SW |
1429 | dasd_put_device(device); |
1430 | if (data->isglobal) | |
1431 | mutex_unlock(&dasd_path_verification_mutex); | |
1432 | else | |
1433 | kfree(data); | |
1434 | } | |
1435 | ||
1436 | static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm) | |
1437 | { | |
1438 | struct path_verification_work_data *data; | |
1439 | ||
1440 | data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); | |
1441 | if (!data) { | |
1442 | if (mutex_trylock(&dasd_path_verification_mutex)) { | |
1443 | data = path_verification_worker; | |
1444 | data->isglobal = 1; | |
1445 | } else | |
1446 | return -ENOMEM; | |
1447 | } else { | |
1448 | memset(data, 0, sizeof(*data)); | |
1449 | data->isglobal = 0; | |
1450 | } | |
1451 | INIT_WORK(&data->worker, do_path_verification_work); | |
1452 | dasd_get_device(device); | |
1453 | data->device = device; | |
1454 | data->tbvpm = lpm; | |
1455 | schedule_work(&data->worker); | |
1456 | return 0; | |
1457 | } | |
1458 | ||
8e09f215 SW |
1459 | static int dasd_eckd_read_features(struct dasd_device *device) |
1460 | { | |
543691a4 | 1461 | struct dasd_eckd_private *private = device->private; |
8e09f215 SW |
1462 | struct dasd_psf_prssd_data *prssdp; |
1463 | struct dasd_rssd_features *features; | |
1464 | struct dasd_ccw_req *cqr; | |
1465 | struct ccw1 *ccw; | |
1466 | int rc; | |
8e09f215 | 1467 | |
68d1e5f0 | 1468 | memset(&private->features, 0, sizeof(struct dasd_rssd_features)); |
68b781fe | 1469 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, |
8e09f215 SW |
1470 | (sizeof(struct dasd_psf_prssd_data) + |
1471 | sizeof(struct dasd_rssd_features)), | |
1472 | device); | |
1473 | if (IS_ERR(cqr)) { | |
b8ed5dd5 SH |
1474 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " |
1475 | "allocate initialization request"); | |
8e09f215 SW |
1476 | return PTR_ERR(cqr); |
1477 | } | |
1478 | cqr->startdev = device; | |
1479 | cqr->memdev = device; | |
1480 | cqr->block = NULL; | |
eb6e199b | 1481 | cqr->retries = 256; |
8e09f215 SW |
1482 | cqr->expires = 10 * HZ; |
1483 | ||
1484 | /* Prepare for Read Subsystem Data */ | |
1485 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
1486 | memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); | |
1487 | prssdp->order = PSF_ORDER_PRSSD; | |
1488 | prssdp->suborder = 0x41; /* Read Feature Codes */ | |
1489 | /* all other bytes of prssdp must be zero */ | |
1490 | ||
1491 | ccw = cqr->cpaddr; | |
1492 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
1493 | ccw->count = sizeof(struct dasd_psf_prssd_data); | |
1494 | ccw->flags |= CCW_FLAG_CC; | |
1495 | ccw->cda = (__u32)(addr_t) prssdp; | |
1496 | ||
1497 | /* Read Subsystem Data - feature codes */ | |
1498 | features = (struct dasd_rssd_features *) (prssdp + 1); | |
1499 | memset(features, 0, sizeof(struct dasd_rssd_features)); | |
1500 | ||
1501 | ccw++; | |
1502 | ccw->cmd_code = DASD_ECKD_CCW_RSSD; | |
1503 | ccw->count = sizeof(struct dasd_rssd_features); | |
1504 | ccw->cda = (__u32)(addr_t) features; | |
1505 | ||
1aae0560 | 1506 | cqr->buildclk = get_tod_clock(); |
8e09f215 SW |
1507 | cqr->status = DASD_CQR_FILLED; |
1508 | rc = dasd_sleep_on(cqr); | |
1509 | if (rc == 0) { | |
1510 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
1511 | features = (struct dasd_rssd_features *) (prssdp + 1); | |
1512 | memcpy(&private->features, features, | |
1513 | sizeof(struct dasd_rssd_features)); | |
68d1e5f0 SW |
1514 | } else |
1515 | dev_warn(&device->cdev->dev, "Reading device feature codes" | |
1516 | " failed with rc=%d\n", rc); | |
8e09f215 SW |
1517 | dasd_sfree_request(cqr, cqr->memdev); |
1518 | return rc; | |
1519 | } | |
1520 | ||
1521 | ||
40545573 HH |
1522 | /* |
1523 | * Build CP for Perform Subsystem Function - SSC. | |
1524 | */ | |
f3eb5384 SW |
1525 | static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, |
1526 | int enable_pav) | |
40545573 | 1527 | { |
8e09f215 SW |
1528 | struct dasd_ccw_req *cqr; |
1529 | struct dasd_psf_ssc_data *psf_ssc_data; | |
1530 | struct ccw1 *ccw; | |
40545573 | 1531 | |
68b781fe | 1532 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , |
40545573 HH |
1533 | sizeof(struct dasd_psf_ssc_data), |
1534 | device); | |
1535 | ||
8e09f215 | 1536 | if (IS_ERR(cqr)) { |
fc19f381 | 1537 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
40545573 | 1538 | "Could not allocate PSF-SSC request"); |
8e09f215 SW |
1539 | return cqr; |
1540 | } | |
1541 | psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; | |
1542 | psf_ssc_data->order = PSF_ORDER_SSC; | |
626350b6 | 1543 | psf_ssc_data->suborder = 0xc0; |
f3eb5384 | 1544 | if (enable_pav) { |
626350b6 | 1545 | psf_ssc_data->suborder |= 0x08; |
f3eb5384 SW |
1546 | psf_ssc_data->reserved[0] = 0x88; |
1547 | } | |
8e09f215 SW |
1548 | ccw = cqr->cpaddr; |
1549 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
1550 | ccw->cda = (__u32)(addr_t)psf_ssc_data; | |
1551 | ccw->count = 66; | |
1552 | ||
1553 | cqr->startdev = device; | |
1554 | cqr->memdev = device; | |
1555 | cqr->block = NULL; | |
eb6e199b | 1556 | cqr->retries = 256; |
8e09f215 | 1557 | cqr->expires = 10*HZ; |
1aae0560 | 1558 | cqr->buildclk = get_tod_clock(); |
8e09f215 SW |
1559 | cqr->status = DASD_CQR_FILLED; |
1560 | return cqr; | |
40545573 HH |
1561 | } |
1562 | ||
1563 | /* | |
1564 | * Perform Subsystem Function. | |
1565 | * It is necessary to trigger CIO for channel revalidation since this | |
1566 | * call might change behaviour of DASD devices. | |
1567 | */ | |
1568 | static int | |
12d7b107 SH |
1569 | dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav, |
1570 | unsigned long flags) | |
40545573 | 1571 | { |
8e09f215 SW |
1572 | struct dasd_ccw_req *cqr; |
1573 | int rc; | |
1574 | ||
f3eb5384 | 1575 | cqr = dasd_eckd_build_psf_ssc(device, enable_pav); |
8e09f215 SW |
1576 | if (IS_ERR(cqr)) |
1577 | return PTR_ERR(cqr); | |
1578 | ||
12d7b107 SH |
1579 | /* |
1580 | * set flags e.g. turn on failfast, to prevent blocking | |
1581 | * the calling function should handle failed requests | |
1582 | */ | |
1583 | cqr->flags |= flags; | |
1584 | ||
8e09f215 SW |
1585 | rc = dasd_sleep_on(cqr); |
1586 | if (!rc) | |
1587 | /* trigger CIO to reprobe devices */ | |
1588 | css_schedule_reprobe(); | |
12d7b107 SH |
1589 | else if (cqr->intrc == -EAGAIN) |
1590 | rc = -EAGAIN; | |
1591 | ||
8e09f215 SW |
1592 | dasd_sfree_request(cqr, cqr->memdev); |
1593 | return rc; | |
40545573 HH |
1594 | } |
1595 | ||
1596 | /* | |
1597 | * Valide storage server of current device. | |
1598 | */ | |
12d7b107 SH |
1599 | static int dasd_eckd_validate_server(struct dasd_device *device, |
1600 | unsigned long flags) | |
40545573 | 1601 | { |
543691a4 SO |
1602 | struct dasd_eckd_private *private = device->private; |
1603 | int enable_pav, rc; | |
40545573 | 1604 | |
f9f8d02f SH |
1605 | if (private->uid.type == UA_BASE_PAV_ALIAS || |
1606 | private->uid.type == UA_HYPER_PAV_ALIAS) | |
12d7b107 | 1607 | return 0; |
40545573 | 1608 | if (dasd_nopav || MACHINE_IS_VM) |
f3eb5384 SW |
1609 | enable_pav = 0; |
1610 | else | |
1611 | enable_pav = 1; | |
12d7b107 | 1612 | rc = dasd_eckd_psf_ssc(device, enable_pav, flags); |
eb6e199b | 1613 | |
8e79a441 HH |
1614 | /* may be requested feature is not available on server, |
1615 | * therefore just report error and go ahead */ | |
b8ed5dd5 SH |
1616 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " |
1617 | "returned rc=%d", private->uid.ssid, rc); | |
12d7b107 | 1618 | return rc; |
40545573 HH |
1619 | } |
1620 | ||
f1633031 SH |
1621 | /* |
1622 | * worker to do a validate server in case of a lost pathgroup | |
1623 | */ | |
1624 | static void dasd_eckd_do_validate_server(struct work_struct *work) | |
1625 | { | |
1626 | struct dasd_device *device = container_of(work, struct dasd_device, | |
1627 | kick_validate); | |
ea4da6ea SH |
1628 | unsigned long flags = 0; |
1629 | ||
1630 | set_bit(DASD_CQR_FLAGS_FAILFAST, &flags); | |
1631 | if (dasd_eckd_validate_server(device, flags) | |
12d7b107 SH |
1632 | == -EAGAIN) { |
1633 | /* schedule worker again if failed */ | |
1634 | schedule_work(&device->kick_validate); | |
1635 | return; | |
1636 | } | |
1637 | ||
f1633031 SH |
1638 | dasd_put_device(device); |
1639 | } | |
1640 | ||
1641 | static void dasd_eckd_kick_validate_server(struct dasd_device *device) | |
1642 | { | |
1643 | dasd_get_device(device); | |
25e2cf1c SH |
1644 | /* exit if device not online or in offline processing */ |
1645 | if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || | |
1646 | device->state < DASD_STATE_ONLINE) { | |
1647 | dasd_put_device(device); | |
1648 | return; | |
1649 | } | |
f1633031 | 1650 | /* queue call to do_validate_server to the kernel event daemon. */ |
f2608cd4 SH |
1651 | if (!schedule_work(&device->kick_validate)) |
1652 | dasd_put_device(device); | |
f1633031 SH |
1653 | } |
1654 | ||
ef19298b SW |
1655 | static u32 get_fcx_max_data(struct dasd_device *device) |
1656 | { | |
543691a4 | 1657 | struct dasd_eckd_private *private = device->private; |
ef19298b | 1658 | int fcx_in_css, fcx_in_gneq, fcx_in_features; |
543691a4 | 1659 | int tpm, mdc; |
ef19298b SW |
1660 | |
1661 | if (dasd_nofcx) | |
1662 | return 0; | |
1663 | /* is transport mode supported? */ | |
ef19298b SW |
1664 | fcx_in_css = css_general_characteristics.fcx; |
1665 | fcx_in_gneq = private->gneq->reserved2[7] & 0x04; | |
1666 | fcx_in_features = private->features.feature[40] & 0x80; | |
1667 | tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; | |
1668 | ||
1669 | if (!tpm) | |
1670 | return 0; | |
1671 | ||
1672 | mdc = ccw_device_get_mdc(device->cdev, 0); | |
1673 | if (mdc < 0) { | |
1674 | dev_warn(&device->cdev->dev, "Detecting the maximum supported" | |
1675 | " data size for zHPF requests failed\n"); | |
1676 | return 0; | |
1677 | } else | |
1678 | return mdc * FCX_MAX_DATA_FACTOR; | |
ef19298b SW |
1679 | } |
1680 | ||
3d052595 HH |
1681 | /* |
1682 | * Check device characteristics. | |
1683 | * If the device is accessible using ECKD discipline, the device is enabled. | |
1684 | */ | |
1da177e4 LT |
1685 | static int |
1686 | dasd_eckd_check_characteristics(struct dasd_device *device) | |
1687 | { | |
543691a4 | 1688 | struct dasd_eckd_private *private = device->private; |
8e09f215 | 1689 | struct dasd_block *block; |
2dedf0d9 | 1690 | struct dasd_uid temp_uid; |
f9f8d02f | 1691 | int rc, i; |
33b62a30 | 1692 | int readonly; |
7c8faa86 | 1693 | unsigned long value; |
1da177e4 | 1694 | |
f1633031 SH |
1695 | /* setup work queue for validate server*/ |
1696 | INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); | |
59a9ed5f SH |
1697 | /* setup work queue for summary unit check */ |
1698 | INIT_WORK(&device->suc_work, dasd_alias_handle_summary_unit_check); | |
f1633031 | 1699 | |
454e1fa1 PO |
1700 | if (!ccw_device_is_pathgroup(device->cdev)) { |
1701 | dev_warn(&device->cdev->dev, | |
1702 | "A channel path group could not be established\n"); | |
1703 | return -EIO; | |
1704 | } | |
1705 | if (!ccw_device_is_multipath(device->cdev)) { | |
1706 | dev_info(&device->cdev->dev, | |
1707 | "The DASD is not operating in multipath mode\n"); | |
1708 | } | |
92636b15 SO |
1709 | if (!private) { |
1710 | private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); | |
1711 | if (!private) { | |
fc19f381 SH |
1712 | dev_warn(&device->cdev->dev, |
1713 | "Allocating memory for private DASD data " | |
1714 | "failed\n"); | |
1da177e4 LT |
1715 | return -ENOMEM; |
1716 | } | |
543691a4 | 1717 | device->private = private; |
92636b15 SO |
1718 | } else { |
1719 | memset(private, 0, sizeof(*private)); | |
1da177e4 LT |
1720 | } |
1721 | /* Invalidate status of initial analysis. */ | |
1722 | private->init_cqr_status = -1; | |
1723 | /* Set default cache operations. */ | |
1724 | private->attrib.operation = DASD_NORMAL_CACHE; | |
1725 | private->attrib.nr_cyl = 0; | |
1726 | ||
40545573 HH |
1727 | /* Read Configuration Data */ |
1728 | rc = dasd_eckd_read_conf(device); | |
1729 | if (rc) | |
8e09f215 | 1730 | goto out_err1; |
40545573 | 1731 | |
7c8faa86 SH |
1732 | /* set default timeout */ |
1733 | device->default_expires = DASD_EXPIRES; | |
1f1ee9ad HR |
1734 | /* set default retry count */ |
1735 | device->default_retries = DASD_RETRIES; | |
1736 | ||
7c8faa86 SH |
1737 | if (private->gneq) { |
1738 | value = 1; | |
1739 | for (i = 0; i < private->gneq->timeout.value; i++) | |
1740 | value = 10 * value; | |
1741 | value = value * private->gneq->timeout.number; | |
1742 | /* do not accept useless values */ | |
1743 | if (value != 0 && value <= DASD_EXPIRES_MAX) | |
1744 | device->default_expires = value; | |
1745 | } | |
1746 | ||
2dedf0d9 SH |
1747 | dasd_eckd_get_uid(device, &temp_uid); |
1748 | if (temp_uid.type == UA_BASE_DEVICE) { | |
8e09f215 SW |
1749 | block = dasd_alloc_block(); |
1750 | if (IS_ERR(block)) { | |
b8ed5dd5 SH |
1751 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", |
1752 | "could not allocate dasd " | |
1753 | "block structure"); | |
8e09f215 SW |
1754 | rc = PTR_ERR(block); |
1755 | goto out_err1; | |
1756 | } | |
1757 | device->block = block; | |
1758 | block->base = device; | |
1759 | } | |
1760 | ||
f9f8d02f SH |
1761 | /* register lcu with alias handling, enable PAV */ |
1762 | rc = dasd_alias_make_device_known_to_lcu(device); | |
1763 | if (rc) | |
8e09f215 | 1764 | goto out_err2; |
f9f8d02f | 1765 | |
12d7b107 | 1766 | dasd_eckd_validate_server(device, 0); |
f4ac1d02 SW |
1767 | |
1768 | /* device may report different configuration data after LCU setup */ | |
1769 | rc = dasd_eckd_read_conf(device); | |
1770 | if (rc) | |
1771 | goto out_err3; | |
8e09f215 SW |
1772 | |
1773 | /* Read Feature Codes */ | |
68d1e5f0 | 1774 | dasd_eckd_read_features(device); |
40545573 | 1775 | |
1da177e4 | 1776 | /* Read Device Characteristics */ |
68b781fe SH |
1777 | rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, |
1778 | &private->rdc_data, 64); | |
8e09f215 | 1779 | if (rc) { |
b8ed5dd5 SH |
1780 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, |
1781 | "Read device characteristic failed, rc=%d", rc); | |
8e09f215 SW |
1782 | goto out_err3; |
1783 | } | |
34cd551a SH |
1784 | |
1785 | if ((device->features & DASD_FEATURE_USERAW) && | |
1786 | !(private->rdc_data.facilities.RT_in_LR)) { | |
1787 | dev_err(&device->cdev->dev, "The storage server does not " | |
1788 | "support raw-track access\n"); | |
1789 | rc = -EINVAL; | |
1790 | goto out_err3; | |
1791 | } | |
1792 | ||
817f2c84 | 1793 | /* find the valid cylinder size */ |
b44b0ab3 SW |
1794 | if (private->rdc_data.no_cyl == LV_COMPAT_CYL && |
1795 | private->rdc_data.long_no_cyl) | |
1796 | private->real_cyl = private->rdc_data.long_no_cyl; | |
1797 | else | |
1798 | private->real_cyl = private->rdc_data.no_cyl; | |
1799 | ||
ef19298b SW |
1800 | private->fcx_max_data = get_fcx_max_data(device); |
1801 | ||
33b62a30 SW |
1802 | readonly = dasd_device_is_ro(device); |
1803 | if (readonly) | |
1804 | set_bit(DASD_FLAG_DEVICE_RO, &device->flags); | |
1805 | ||
fc19f381 | 1806 | dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " |
33b62a30 | 1807 | "with %d cylinders, %d heads, %d sectors%s\n", |
fc19f381 SH |
1808 | private->rdc_data.dev_type, |
1809 | private->rdc_data.dev_model, | |
1810 | private->rdc_data.cu_type, | |
1811 | private->rdc_data.cu_model.model, | |
92636b15 | 1812 | private->real_cyl, |
fc19f381 | 1813 | private->rdc_data.trk_per_cyl, |
33b62a30 SW |
1814 | private->rdc_data.sec_per_trk, |
1815 | readonly ? ", read-only device" : ""); | |
8e09f215 SW |
1816 | return 0; |
1817 | ||
1818 | out_err3: | |
1819 | dasd_alias_disconnect_device_from_lcu(device); | |
1820 | out_err2: | |
1821 | dasd_free_block(device->block); | |
1822 | device->block = NULL; | |
1823 | out_err1: | |
4abb08c2 | 1824 | kfree(private->conf_data); |
8e09f215 SW |
1825 | kfree(device->private); |
1826 | device->private = NULL; | |
3d052595 | 1827 | return rc; |
1da177e4 LT |
1828 | } |
1829 | ||
8e09f215 SW |
1830 | static void dasd_eckd_uncheck_device(struct dasd_device *device) |
1831 | { | |
543691a4 | 1832 | struct dasd_eckd_private *private = device->private; |
b179b037 | 1833 | int i; |
4abb08c2 | 1834 | |
8e09f215 | 1835 | dasd_alias_disconnect_device_from_lcu(device); |
4abb08c2 SW |
1836 | private->ned = NULL; |
1837 | private->sneq = NULL; | |
1838 | private->vdsneq = NULL; | |
1839 | private->gneq = NULL; | |
1840 | private->conf_len = 0; | |
b179b037 SH |
1841 | for (i = 0; i < 8; i++) { |
1842 | kfree(private->path_conf_data[i]); | |
1843 | if ((__u8 *)private->path_conf_data[i] == | |
1844 | private->conf_data) { | |
1845 | private->conf_data = NULL; | |
1846 | private->conf_len = 0; | |
1847 | } | |
1848 | private->path_conf_data[i] = NULL; | |
1849 | } | |
4abb08c2 SW |
1850 | kfree(private->conf_data); |
1851 | private->conf_data = NULL; | |
8e09f215 SW |
1852 | } |
1853 | ||
1da177e4 LT |
1854 | static struct dasd_ccw_req * |
1855 | dasd_eckd_analysis_ccw(struct dasd_device *device) | |
1856 | { | |
543691a4 | 1857 | struct dasd_eckd_private *private = device->private; |
1da177e4 LT |
1858 | struct eckd_count *count_data; |
1859 | struct LO_eckd_data *LO_data; | |
1860 | struct dasd_ccw_req *cqr; | |
1861 | struct ccw1 *ccw; | |
1862 | int cplength, datasize; | |
1863 | int i; | |
1864 | ||
1da177e4 LT |
1865 | cplength = 8; |
1866 | datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); | |
68b781fe | 1867 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); |
1da177e4 LT |
1868 | if (IS_ERR(cqr)) |
1869 | return cqr; | |
1870 | ccw = cqr->cpaddr; | |
1871 | /* Define extent for the first 3 tracks. */ | |
1872 | define_extent(ccw++, cqr->data, 0, 2, | |
1873 | DASD_ECKD_CCW_READ_COUNT, device); | |
8e09f215 | 1874 | LO_data = cqr->data + sizeof(struct DE_eckd_data); |
1da177e4 LT |
1875 | /* Locate record for the first 4 records on track 0. */ |
1876 | ccw[-1].flags |= CCW_FLAG_CC; | |
1877 | locate_record(ccw++, LO_data++, 0, 0, 4, | |
1878 | DASD_ECKD_CCW_READ_COUNT, device, 0); | |
1879 | ||
1880 | count_data = private->count_area; | |
1881 | for (i = 0; i < 4; i++) { | |
1882 | ccw[-1].flags |= CCW_FLAG_CC; | |
1883 | ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; | |
1884 | ccw->flags = 0; | |
1885 | ccw->count = 8; | |
1886 | ccw->cda = (__u32)(addr_t) count_data; | |
1887 | ccw++; | |
1888 | count_data++; | |
1889 | } | |
1890 | ||
1891 | /* Locate record for the first record on track 2. */ | |
1892 | ccw[-1].flags |= CCW_FLAG_CC; | |
1893 | locate_record(ccw++, LO_data++, 2, 0, 1, | |
1894 | DASD_ECKD_CCW_READ_COUNT, device, 0); | |
1895 | /* Read count ccw. */ | |
1896 | ccw[-1].flags |= CCW_FLAG_CC; | |
1897 | ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; | |
1898 | ccw->flags = 0; | |
1899 | ccw->count = 8; | |
1900 | ccw->cda = (__u32)(addr_t) count_data; | |
1901 | ||
8e09f215 SW |
1902 | cqr->block = NULL; |
1903 | cqr->startdev = device; | |
1904 | cqr->memdev = device; | |
eb6e199b | 1905 | cqr->retries = 255; |
1aae0560 | 1906 | cqr->buildclk = get_tod_clock(); |
1da177e4 LT |
1907 | cqr->status = DASD_CQR_FILLED; |
1908 | return cqr; | |
1909 | } | |
1910 | ||
eb6e199b SW |
1911 | /* differentiate between 'no record found' and any other error */ |
1912 | static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) | |
1913 | { | |
1914 | char *sense; | |
1915 | if (init_cqr->status == DASD_CQR_DONE) | |
1916 | return INIT_CQR_OK; | |
1917 | else if (init_cqr->status == DASD_CQR_NEED_ERP || | |
1918 | init_cqr->status == DASD_CQR_FAILED) { | |
1919 | sense = dasd_get_sense(&init_cqr->irb); | |
1920 | if (sense && (sense[1] & SNS1_NO_REC_FOUND)) | |
1921 | return INIT_CQR_UNFORMATTED; | |
1922 | else | |
1923 | return INIT_CQR_ERROR; | |
1924 | } else | |
1925 | return INIT_CQR_ERROR; | |
1926 | } | |
1927 | ||
1da177e4 LT |
1928 | /* |
1929 | * This is the callback function for the init_analysis cqr. It saves | |
1930 | * the status of the initial analysis ccw before it frees it and kicks | |
1931 | * the device to continue the startup sequence. This will call | |
1932 | * dasd_eckd_do_analysis again (if the devices has not been marked | |
1933 | * for deletion in the meantime). | |
1934 | */ | |
eb6e199b SW |
1935 | static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, |
1936 | void *data) | |
1da177e4 | 1937 | { |
543691a4 SO |
1938 | struct dasd_device *device = init_cqr->startdev; |
1939 | struct dasd_eckd_private *private = device->private; | |
1da177e4 | 1940 | |
eb6e199b | 1941 | private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); |
1da177e4 LT |
1942 | dasd_sfree_request(init_cqr, device); |
1943 | dasd_kick_device(device); | |
1944 | } | |
1945 | ||
eb6e199b | 1946 | static int dasd_eckd_start_analysis(struct dasd_block *block) |
1da177e4 | 1947 | { |
1da177e4 LT |
1948 | struct dasd_ccw_req *init_cqr; |
1949 | ||
8e09f215 | 1950 | init_cqr = dasd_eckd_analysis_ccw(block->base); |
1da177e4 LT |
1951 | if (IS_ERR(init_cqr)) |
1952 | return PTR_ERR(init_cqr); | |
1953 | init_cqr->callback = dasd_eckd_analysis_callback; | |
1954 | init_cqr->callback_data = NULL; | |
1955 | init_cqr->expires = 5*HZ; | |
eb6e199b SW |
1956 | /* first try without ERP, so we can later handle unformatted |
1957 | * devices as special case | |
1958 | */ | |
1959 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); | |
1960 | init_cqr->retries = 0; | |
1da177e4 LT |
1961 | dasd_add_request_head(init_cqr); |
1962 | return -EAGAIN; | |
1963 | } | |
1964 | ||
eb6e199b | 1965 | static int dasd_eckd_end_analysis(struct dasd_block *block) |
1da177e4 | 1966 | { |
543691a4 SO |
1967 | struct dasd_device *device = block->base; |
1968 | struct dasd_eckd_private *private = device->private; | |
1da177e4 LT |
1969 | struct eckd_count *count_area; |
1970 | unsigned int sb, blk_per_trk; | |
1971 | int status, i; | |
eb6e199b | 1972 | struct dasd_ccw_req *init_cqr; |
1da177e4 | 1973 | |
1da177e4 LT |
1974 | status = private->init_cqr_status; |
1975 | private->init_cqr_status = -1; | |
eb6e199b SW |
1976 | if (status == INIT_CQR_ERROR) { |
1977 | /* try again, this time with full ERP */ | |
1978 | init_cqr = dasd_eckd_analysis_ccw(device); | |
1979 | dasd_sleep_on(init_cqr); | |
1980 | status = dasd_eckd_analysis_evaluation(init_cqr); | |
1981 | dasd_sfree_request(init_cqr, device); | |
1982 | } | |
1983 | ||
e4dbb0f2 SH |
1984 | if (device->features & DASD_FEATURE_USERAW) { |
1985 | block->bp_block = DASD_RAW_BLOCKSIZE; | |
1986 | blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; | |
1987 | block->s2b_shift = 3; | |
1988 | goto raw; | |
1989 | } | |
1990 | ||
eb6e199b SW |
1991 | if (status == INIT_CQR_UNFORMATTED) { |
1992 | dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); | |
1da177e4 | 1993 | return -EMEDIUMTYPE; |
eb6e199b SW |
1994 | } else if (status == INIT_CQR_ERROR) { |
1995 | dev_err(&device->cdev->dev, | |
1996 | "Detecting the DASD disk layout failed because " | |
1997 | "of an I/O error\n"); | |
1998 | return -EIO; | |
1da177e4 LT |
1999 | } |
2000 | ||
2001 | private->uses_cdl = 1; | |
1da177e4 LT |
2002 | /* Check Track 0 for Compatible Disk Layout */ |
2003 | count_area = NULL; | |
2004 | for (i = 0; i < 3; i++) { | |
2005 | if (private->count_area[i].kl != 4 || | |
3bc9fef9 SH |
2006 | private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 || |
2007 | private->count_area[i].cyl != 0 || | |
2008 | private->count_area[i].head != count_area_head[i] || | |
2009 | private->count_area[i].record != count_area_rec[i]) { | |
1da177e4 LT |
2010 | private->uses_cdl = 0; |
2011 | break; | |
2012 | } | |
2013 | } | |
2014 | if (i == 3) | |
2015 | count_area = &private->count_area[4]; | |
2016 | ||
2017 | if (private->uses_cdl == 0) { | |
2018 | for (i = 0; i < 5; i++) { | |
2019 | if ((private->count_area[i].kl != 0) || | |
2020 | (private->count_area[i].dl != | |
3bc9fef9 SH |
2021 | private->count_area[0].dl) || |
2022 | private->count_area[i].cyl != 0 || | |
2023 | private->count_area[i].head != count_area_head[i] || | |
2024 | private->count_area[i].record != count_area_rec[i]) | |
1da177e4 LT |
2025 | break; |
2026 | } | |
2027 | if (i == 5) | |
2028 | count_area = &private->count_area[0]; | |
2029 | } else { | |
2030 | if (private->count_area[3].record == 1) | |
fc19f381 SH |
2031 | dev_warn(&device->cdev->dev, |
2032 | "Track 0 has no records following the VTOC\n"); | |
1da177e4 | 2033 | } |
e4dbb0f2 | 2034 | |
1da177e4 LT |
2035 | if (count_area != NULL && count_area->kl == 0) { |
2036 | /* we found notthing violating our disk layout */ | |
2037 | if (dasd_check_blocksize(count_area->dl) == 0) | |
8e09f215 | 2038 | block->bp_block = count_area->dl; |
1da177e4 | 2039 | } |
8e09f215 | 2040 | if (block->bp_block == 0) { |
fc19f381 SH |
2041 | dev_warn(&device->cdev->dev, |
2042 | "The disk layout of the DASD is not supported\n"); | |
1da177e4 LT |
2043 | return -EMEDIUMTYPE; |
2044 | } | |
8e09f215 SW |
2045 | block->s2b_shift = 0; /* bits to shift 512 to get a block */ |
2046 | for (sb = 512; sb < block->bp_block; sb = sb << 1) | |
2047 | block->s2b_shift++; | |
1da177e4 | 2048 | |
8e09f215 | 2049 | blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); |
e4dbb0f2 SH |
2050 | |
2051 | raw: | |
b44b0ab3 | 2052 | block->blocks = (private->real_cyl * |
1da177e4 LT |
2053 | private->rdc_data.trk_per_cyl * |
2054 | blk_per_trk); | |
2055 | ||
fc19f381 SH |
2056 | dev_info(&device->cdev->dev, |
2057 | "DASD with %d KB/block, %d KB total size, %d KB/track, " | |
2058 | "%s\n", (block->bp_block >> 10), | |
2059 | ((private->real_cyl * | |
2060 | private->rdc_data.trk_per_cyl * | |
2061 | blk_per_trk * (block->bp_block >> 9)) >> 1), | |
2062 | ((blk_per_trk * block->bp_block) >> 10), | |
2063 | private->uses_cdl ? | |
2064 | "compatible disk layout" : "linux disk layout"); | |
1da177e4 LT |
2065 | |
2066 | return 0; | |
2067 | } | |
2068 | ||
8e09f215 | 2069 | static int dasd_eckd_do_analysis(struct dasd_block *block) |
1da177e4 | 2070 | { |
543691a4 | 2071 | struct dasd_eckd_private *private = block->base->private; |
1da177e4 | 2072 | |
1da177e4 | 2073 | if (private->init_cqr_status < 0) |
8e09f215 | 2074 | return dasd_eckd_start_analysis(block); |
1da177e4 | 2075 | else |
8e09f215 | 2076 | return dasd_eckd_end_analysis(block); |
1da177e4 LT |
2077 | } |
2078 | ||
d42e1712 | 2079 | static int dasd_eckd_basic_to_ready(struct dasd_device *device) |
8e09f215 SW |
2080 | { |
2081 | return dasd_alias_add_device(device); | |
2082 | }; | |
2083 | ||
2084 | static int dasd_eckd_online_to_ready(struct dasd_device *device) | |
2085 | { | |
501183f2 | 2086 | cancel_work_sync(&device->reload_device); |
25e2cf1c | 2087 | cancel_work_sync(&device->kick_validate); |
d42e1712 SH |
2088 | return 0; |
2089 | }; | |
2090 | ||
daa991bf | 2091 | static int dasd_eckd_basic_to_known(struct dasd_device *device) |
d42e1712 | 2092 | { |
8e09f215 SW |
2093 | return dasd_alias_remove_device(device); |
2094 | }; | |
2095 | ||
1da177e4 | 2096 | static int |
8e09f215 | 2097 | dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) |
1da177e4 | 2098 | { |
543691a4 | 2099 | struct dasd_eckd_private *private = block->base->private; |
1da177e4 | 2100 | |
8e09f215 | 2101 | if (dasd_check_blocksize(block->bp_block) == 0) { |
1da177e4 | 2102 | geo->sectors = recs_per_track(&private->rdc_data, |
8e09f215 | 2103 | 0, block->bp_block); |
1da177e4 LT |
2104 | } |
2105 | geo->cylinders = private->rdc_data.no_cyl; | |
2106 | geo->heads = private->rdc_data.trk_per_cyl; | |
2107 | return 0; | |
2108 | } | |
2109 | ||
8fd57520 JH |
2110 | /* |
2111 | * Build the TCW request for the format check | |
2112 | */ | |
2113 | static struct dasd_ccw_req * | |
2114 | dasd_eckd_build_check_tcw(struct dasd_device *base, struct format_data_t *fdata, | |
2115 | int enable_pav, struct eckd_count *fmt_buffer, | |
2116 | int rpt) | |
2117 | { | |
2118 | struct dasd_eckd_private *start_priv; | |
2119 | struct dasd_device *startdev = NULL; | |
2120 | struct tidaw *last_tidaw = NULL; | |
2121 | struct dasd_ccw_req *cqr; | |
2122 | struct itcw *itcw; | |
2123 | int itcw_size; | |
2124 | int count; | |
2125 | int rc; | |
2126 | int i; | |
2127 | ||
2128 | if (enable_pav) | |
2129 | startdev = dasd_alias_get_start_dev(base); | |
2130 | ||
2131 | if (!startdev) | |
2132 | startdev = base; | |
2133 | ||
2134 | start_priv = startdev->private; | |
2135 | ||
2136 | count = rpt * (fdata->stop_unit - fdata->start_unit + 1); | |
2137 | ||
2138 | /* | |
2139 | * we're adding 'count' amount of tidaw to the itcw. | |
2140 | * calculate the corresponding itcw_size | |
2141 | */ | |
2142 | itcw_size = itcw_calc_size(0, count, 0); | |
2143 | ||
2144 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); | |
2145 | if (IS_ERR(cqr)) | |
2146 | return cqr; | |
2147 | ||
2148 | start_priv->count++; | |
2149 | ||
2150 | itcw = itcw_init(cqr->data, itcw_size, ITCW_OP_READ, 0, count, 0); | |
2151 | if (IS_ERR(itcw)) { | |
2152 | rc = -EINVAL; | |
2153 | goto out_err; | |
2154 | } | |
2155 | ||
2156 | cqr->cpaddr = itcw_get_tcw(itcw); | |
2157 | rc = prepare_itcw(itcw, fdata->start_unit, fdata->stop_unit, | |
2158 | DASD_ECKD_CCW_READ_COUNT_MT, base, startdev, 0, count, | |
2159 | sizeof(struct eckd_count), | |
2160 | count * sizeof(struct eckd_count), 0, rpt); | |
2161 | if (rc) | |
2162 | goto out_err; | |
2163 | ||
2164 | for (i = 0; i < count; i++) { | |
2165 | last_tidaw = itcw_add_tidaw(itcw, 0, fmt_buffer++, | |
2166 | sizeof(struct eckd_count)); | |
2167 | if (IS_ERR(last_tidaw)) { | |
2168 | rc = -EINVAL; | |
2169 | goto out_err; | |
2170 | } | |
2171 | } | |
2172 | ||
2173 | last_tidaw->flags |= TIDAW_FLAGS_LAST; | |
2174 | itcw_finalize(itcw); | |
2175 | ||
2176 | cqr->cpmode = 1; | |
2177 | cqr->startdev = startdev; | |
2178 | cqr->memdev = startdev; | |
2179 | cqr->basedev = base; | |
2180 | cqr->retries = startdev->default_retries; | |
2181 | cqr->expires = startdev->default_expires * HZ; | |
2182 | cqr->buildclk = get_tod_clock(); | |
2183 | cqr->status = DASD_CQR_FILLED; | |
2184 | /* Set flags to suppress output for expected errors */ | |
2185 | set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); | |
2186 | set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); | |
2187 | ||
2188 | return cqr; | |
2189 | ||
2190 | out_err: | |
2191 | dasd_sfree_request(cqr, startdev); | |
2192 | ||
2193 | return ERR_PTR(rc); | |
2194 | } | |
2195 | ||
2196 | /* | |
2197 | * Build the CCW request for the format check | |
2198 | */ | |
2199 | static struct dasd_ccw_req * | |
2200 | dasd_eckd_build_check(struct dasd_device *base, struct format_data_t *fdata, | |
2201 | int enable_pav, struct eckd_count *fmt_buffer, int rpt) | |
2202 | { | |
2203 | struct dasd_eckd_private *start_priv; | |
2204 | struct dasd_eckd_private *base_priv; | |
2205 | struct dasd_device *startdev = NULL; | |
2206 | struct dasd_ccw_req *cqr; | |
2207 | struct ccw1 *ccw; | |
2208 | void *data; | |
2209 | int cplength, datasize; | |
2210 | int use_prefix; | |
2211 | int count; | |
2212 | int i; | |
2213 | ||
2214 | if (enable_pav) | |
2215 | startdev = dasd_alias_get_start_dev(base); | |
2216 | ||
2217 | if (!startdev) | |
2218 | startdev = base; | |
2219 | ||
2220 | start_priv = startdev->private; | |
2221 | base_priv = base->private; | |
2222 | ||
2223 | count = rpt * (fdata->stop_unit - fdata->start_unit + 1); | |
2224 | ||
2225 | use_prefix = base_priv->features.feature[8] & 0x01; | |
2226 | ||
2227 | if (use_prefix) { | |
2228 | cplength = 1; | |
2229 | datasize = sizeof(struct PFX_eckd_data); | |
2230 | } else { | |
2231 | cplength = 2; | |
2232 | datasize = sizeof(struct DE_eckd_data) + | |
2233 | sizeof(struct LO_eckd_data); | |
2234 | } | |
2235 | cplength += count; | |
2236 | ||
2237 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, | |
2238 | startdev); | |
2239 | if (IS_ERR(cqr)) | |
2240 | return cqr; | |
2241 | ||
2242 | start_priv->count++; | |
2243 | data = cqr->data; | |
2244 | ccw = cqr->cpaddr; | |
2245 | ||
2246 | if (use_prefix) { | |
2247 | prefix_LRE(ccw++, data, fdata->start_unit, fdata->stop_unit, | |
2248 | DASD_ECKD_CCW_READ_COUNT, base, startdev, 1, 0, | |
2249 | count, 0, 0); | |
2250 | } else { | |
2251 | define_extent(ccw++, data, fdata->start_unit, fdata->stop_unit, | |
2252 | DASD_ECKD_CCW_READ_COUNT, startdev); | |
2253 | ||
2254 | data += sizeof(struct DE_eckd_data); | |
2255 | ccw[-1].flags |= CCW_FLAG_CC; | |
2256 | ||
2257 | locate_record(ccw++, data, fdata->start_unit, 0, count, | |
2258 | DASD_ECKD_CCW_READ_COUNT, base, 0); | |
2259 | } | |
2260 | ||
2261 | for (i = 0; i < count; i++) { | |
2262 | ccw[-1].flags |= CCW_FLAG_CC; | |
2263 | ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; | |
2264 | ccw->flags = CCW_FLAG_SLI; | |
2265 | ccw->count = 8; | |
2266 | ccw->cda = (__u32)(addr_t) fmt_buffer; | |
2267 | ccw++; | |
2268 | fmt_buffer++; | |
2269 | } | |
2270 | ||
2271 | cqr->startdev = startdev; | |
2272 | cqr->memdev = startdev; | |
2273 | cqr->basedev = base; | |
2274 | cqr->retries = DASD_RETRIES; | |
2275 | cqr->expires = startdev->default_expires * HZ; | |
2276 | cqr->buildclk = get_tod_clock(); | |
2277 | cqr->status = DASD_CQR_FILLED; | |
2278 | /* Set flags to suppress output for expected errors */ | |
2279 | set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); | |
2280 | ||
2281 | return cqr; | |
2282 | } | |
2283 | ||
1da177e4 | 2284 | static struct dasd_ccw_req * |
d42e1712 | 2285 | dasd_eckd_build_format(struct dasd_device *base, |
29b8dd9d | 2286 | struct format_data_t *fdata, |
a94fa154 | 2287 | int enable_pav) |
1da177e4 | 2288 | { |
d42e1712 SH |
2289 | struct dasd_eckd_private *base_priv; |
2290 | struct dasd_eckd_private *start_priv; | |
29b8dd9d | 2291 | struct dasd_device *startdev = NULL; |
1da177e4 LT |
2292 | struct dasd_ccw_req *fcp; |
2293 | struct eckd_count *ect; | |
d42e1712 | 2294 | struct ch_t address; |
1da177e4 LT |
2295 | struct ccw1 *ccw; |
2296 | void *data; | |
b44b0ab3 | 2297 | int rpt; |
1da177e4 | 2298 | int cplength, datasize; |
d42e1712 | 2299 | int i, j; |
f9a28f7b JBJ |
2300 | int intensity = 0; |
2301 | int r0_perm; | |
d42e1712 | 2302 | int nr_tracks; |
18d6624e | 2303 | int use_prefix; |
1da177e4 | 2304 | |
a94fa154 | 2305 | if (enable_pav) |
29b8dd9d SH |
2306 | startdev = dasd_alias_get_start_dev(base); |
2307 | ||
d42e1712 SH |
2308 | if (!startdev) |
2309 | startdev = base; | |
1da177e4 | 2310 | |
543691a4 SO |
2311 | start_priv = startdev->private; |
2312 | base_priv = base->private; | |
d42e1712 SH |
2313 | |
2314 | rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize); | |
2315 | ||
2316 | nr_tracks = fdata->stop_unit - fdata->start_unit + 1; | |
1da177e4 LT |
2317 | |
2318 | /* | |
2319 | * fdata->intensity is a bit string that tells us what to do: | |
2320 | * Bit 0: write record zero | |
2321 | * Bit 1: write home address, currently not supported | |
2322 | * Bit 2: invalidate tracks | |
2323 | * Bit 3: use OS/390 compatible disk layout (cdl) | |
f9a28f7b | 2324 | * Bit 4: do not allow storage subsystem to modify record zero |
1da177e4 LT |
2325 | * Only some bit combinations do make sense. |
2326 | */ | |
f9a28f7b JBJ |
2327 | if (fdata->intensity & 0x10) { |
2328 | r0_perm = 0; | |
2329 | intensity = fdata->intensity & ~0x10; | |
2330 | } else { | |
2331 | r0_perm = 1; | |
2332 | intensity = fdata->intensity; | |
2333 | } | |
d42e1712 | 2334 | |
18d6624e SH |
2335 | use_prefix = base_priv->features.feature[8] & 0x01; |
2336 | ||
f9a28f7b | 2337 | switch (intensity) { |
1da177e4 LT |
2338 | case 0x00: /* Normal format */ |
2339 | case 0x08: /* Normal format, use cdl. */ | |
d42e1712 | 2340 | cplength = 2 + (rpt*nr_tracks); |
18d6624e SH |
2341 | if (use_prefix) |
2342 | datasize = sizeof(struct PFX_eckd_data) + | |
2343 | sizeof(struct LO_eckd_data) + | |
2344 | rpt * nr_tracks * sizeof(struct eckd_count); | |
2345 | else | |
2346 | datasize = sizeof(struct DE_eckd_data) + | |
2347 | sizeof(struct LO_eckd_data) + | |
2348 | rpt * nr_tracks * sizeof(struct eckd_count); | |
1da177e4 LT |
2349 | break; |
2350 | case 0x01: /* Write record zero and format track. */ | |
2351 | case 0x09: /* Write record zero and format track, use cdl. */ | |
d42e1712 | 2352 | cplength = 2 + rpt * nr_tracks; |
18d6624e SH |
2353 | if (use_prefix) |
2354 | datasize = sizeof(struct PFX_eckd_data) + | |
2355 | sizeof(struct LO_eckd_data) + | |
2356 | sizeof(struct eckd_count) + | |
2357 | rpt * nr_tracks * sizeof(struct eckd_count); | |
2358 | else | |
2359 | datasize = sizeof(struct DE_eckd_data) + | |
2360 | sizeof(struct LO_eckd_data) + | |
2361 | sizeof(struct eckd_count) + | |
2362 | rpt * nr_tracks * sizeof(struct eckd_count); | |
1da177e4 LT |
2363 | break; |
2364 | case 0x04: /* Invalidate track. */ | |
2365 | case 0x0c: /* Invalidate track, use cdl. */ | |
2366 | cplength = 3; | |
18d6624e SH |
2367 | if (use_prefix) |
2368 | datasize = sizeof(struct PFX_eckd_data) + | |
2369 | sizeof(struct LO_eckd_data) + | |
2370 | sizeof(struct eckd_count); | |
2371 | else | |
2372 | datasize = sizeof(struct DE_eckd_data) + | |
2373 | sizeof(struct LO_eckd_data) + | |
2374 | sizeof(struct eckd_count); | |
1da177e4 LT |
2375 | break; |
2376 | default: | |
d42e1712 SH |
2377 | dev_warn(&startdev->cdev->dev, |
2378 | "An I/O control call used incorrect flags 0x%x\n", | |
2379 | fdata->intensity); | |
1da177e4 LT |
2380 | return ERR_PTR(-EINVAL); |
2381 | } | |
2382 | /* Allocate the format ccw request. */ | |
d42e1712 SH |
2383 | fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, |
2384 | datasize, startdev); | |
1da177e4 LT |
2385 | if (IS_ERR(fcp)) |
2386 | return fcp; | |
2387 | ||
d42e1712 | 2388 | start_priv->count++; |
1da177e4 LT |
2389 | data = fcp->data; |
2390 | ccw = fcp->cpaddr; | |
2391 | ||
f9a28f7b | 2392 | switch (intensity & ~0x08) { |
1da177e4 | 2393 | case 0x00: /* Normal format. */ |
18d6624e SH |
2394 | if (use_prefix) { |
2395 | prefix(ccw++, (struct PFX_eckd_data *) data, | |
2396 | fdata->start_unit, fdata->stop_unit, | |
2397 | DASD_ECKD_CCW_WRITE_CKD, base, startdev); | |
2398 | /* grant subsystem permission to format R0 */ | |
2399 | if (r0_perm) | |
2400 | ((struct PFX_eckd_data *)data) | |
2401 | ->define_extent.ga_extended |= 0x04; | |
2402 | data += sizeof(struct PFX_eckd_data); | |
2403 | } else { | |
2404 | define_extent(ccw++, (struct DE_eckd_data *) data, | |
2405 | fdata->start_unit, fdata->stop_unit, | |
2406 | DASD_ECKD_CCW_WRITE_CKD, startdev); | |
2407 | /* grant subsystem permission to format R0 */ | |
2408 | if (r0_perm) | |
2409 | ((struct DE_eckd_data *) data) | |
2410 | ->ga_extended |= 0x04; | |
2411 | data += sizeof(struct DE_eckd_data); | |
2412 | } | |
1da177e4 LT |
2413 | ccw[-1].flags |= CCW_FLAG_CC; |
2414 | locate_record(ccw++, (struct LO_eckd_data *) data, | |
d42e1712 SH |
2415 | fdata->start_unit, 0, rpt*nr_tracks, |
2416 | DASD_ECKD_CCW_WRITE_CKD, base, | |
1da177e4 LT |
2417 | fdata->blksize); |
2418 | data += sizeof(struct LO_eckd_data); | |
2419 | break; | |
2420 | case 0x01: /* Write record zero + format track. */ | |
18d6624e SH |
2421 | if (use_prefix) { |
2422 | prefix(ccw++, (struct PFX_eckd_data *) data, | |
2423 | fdata->start_unit, fdata->stop_unit, | |
2424 | DASD_ECKD_CCW_WRITE_RECORD_ZERO, | |
2425 | base, startdev); | |
2426 | data += sizeof(struct PFX_eckd_data); | |
2427 | } else { | |
2428 | define_extent(ccw++, (struct DE_eckd_data *) data, | |
2429 | fdata->start_unit, fdata->stop_unit, | |
2430 | DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev); | |
2431 | data += sizeof(struct DE_eckd_data); | |
2432 | } | |
1da177e4 LT |
2433 | ccw[-1].flags |= CCW_FLAG_CC; |
2434 | locate_record(ccw++, (struct LO_eckd_data *) data, | |
d42e1712 SH |
2435 | fdata->start_unit, 0, rpt * nr_tracks + 1, |
2436 | DASD_ECKD_CCW_WRITE_RECORD_ZERO, base, | |
2437 | base->block->bp_block); | |
1da177e4 LT |
2438 | data += sizeof(struct LO_eckd_data); |
2439 | break; | |
2440 | case 0x04: /* Invalidate track. */ | |
18d6624e SH |
2441 | if (use_prefix) { |
2442 | prefix(ccw++, (struct PFX_eckd_data *) data, | |
2443 | fdata->start_unit, fdata->stop_unit, | |
2444 | DASD_ECKD_CCW_WRITE_CKD, base, startdev); | |
2445 | data += sizeof(struct PFX_eckd_data); | |
2446 | } else { | |
2447 | define_extent(ccw++, (struct DE_eckd_data *) data, | |
2448 | fdata->start_unit, fdata->stop_unit, | |
2449 | DASD_ECKD_CCW_WRITE_CKD, startdev); | |
2450 | data += sizeof(struct DE_eckd_data); | |
2451 | } | |
1da177e4 LT |
2452 | ccw[-1].flags |= CCW_FLAG_CC; |
2453 | locate_record(ccw++, (struct LO_eckd_data *) data, | |
2454 | fdata->start_unit, 0, 1, | |
d42e1712 | 2455 | DASD_ECKD_CCW_WRITE_CKD, base, 8); |
1da177e4 LT |
2456 | data += sizeof(struct LO_eckd_data); |
2457 | break; | |
2458 | } | |
d42e1712 SH |
2459 | |
2460 | for (j = 0; j < nr_tracks; j++) { | |
2461 | /* calculate cylinder and head for the current track */ | |
2462 | set_ch_t(&address, | |
2463 | (fdata->start_unit + j) / | |
2464 | base_priv->rdc_data.trk_per_cyl, | |
2465 | (fdata->start_unit + j) % | |
2466 | base_priv->rdc_data.trk_per_cyl); | |
2467 | if (intensity & 0x01) { /* write record zero */ | |
1da177e4 LT |
2468 | ect = (struct eckd_count *) data; |
2469 | data += sizeof(struct eckd_count); | |
b44b0ab3 SW |
2470 | ect->cyl = address.cyl; |
2471 | ect->head = address.head; | |
d42e1712 | 2472 | ect->record = 0; |
1da177e4 | 2473 | ect->kl = 0; |
d42e1712 | 2474 | ect->dl = 8; |
1da177e4 | 2475 | ccw[-1].flags |= CCW_FLAG_CC; |
d42e1712 | 2476 | ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; |
1da177e4 LT |
2477 | ccw->flags = CCW_FLAG_SLI; |
2478 | ccw->count = 8; | |
2479 | ccw->cda = (__u32)(addr_t) ect; | |
2480 | ccw++; | |
2481 | } | |
d42e1712 SH |
2482 | if ((intensity & ~0x08) & 0x04) { /* erase track */ |
2483 | ect = (struct eckd_count *) data; | |
2484 | data += sizeof(struct eckd_count); | |
2485 | ect->cyl = address.cyl; | |
2486 | ect->head = address.head; | |
2487 | ect->record = 1; | |
2488 | ect->kl = 0; | |
2489 | ect->dl = 0; | |
2490 | ccw[-1].flags |= CCW_FLAG_CC; | |
2491 | ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; | |
2492 | ccw->flags = CCW_FLAG_SLI; | |
2493 | ccw->count = 8; | |
2494 | ccw->cda = (__u32)(addr_t) ect; | |
2495 | } else { /* write remaining records */ | |
2496 | for (i = 0; i < rpt; i++) { | |
2497 | ect = (struct eckd_count *) data; | |
2498 | data += sizeof(struct eckd_count); | |
2499 | ect->cyl = address.cyl; | |
2500 | ect->head = address.head; | |
2501 | ect->record = i + 1; | |
2502 | ect->kl = 0; | |
2503 | ect->dl = fdata->blksize; | |
2504 | /* | |
2505 | * Check for special tracks 0-1 | |
2506 | * when formatting CDL | |
2507 | */ | |
2508 | if ((intensity & 0x08) && | |
46d1c03c | 2509 | address.cyl == 0 && address.head == 0) { |
d42e1712 SH |
2510 | if (i < 3) { |
2511 | ect->kl = 4; | |
2512 | ect->dl = sizes_trk0[i] - 4; | |
2513 | } | |
2514 | } | |
2515 | if ((intensity & 0x08) && | |
46d1c03c | 2516 | address.cyl == 0 && address.head == 1) { |
d42e1712 SH |
2517 | ect->kl = 44; |
2518 | ect->dl = LABEL_SIZE - 44; | |
2519 | } | |
2520 | ccw[-1].flags |= CCW_FLAG_CC; | |
2521 | if (i != 0 || j == 0) | |
2522 | ccw->cmd_code = | |
2523 | DASD_ECKD_CCW_WRITE_CKD; | |
2524 | else | |
2525 | ccw->cmd_code = | |
2526 | DASD_ECKD_CCW_WRITE_CKD_MT; | |
2527 | ccw->flags = CCW_FLAG_SLI; | |
2528 | ccw->count = 8; | |
2529 | ccw->cda = (__u32)(addr_t) ect; | |
2530 | ccw++; | |
2531 | } | |
2532 | } | |
1da177e4 | 2533 | } |
d42e1712 SH |
2534 | |
2535 | fcp->startdev = startdev; | |
2536 | fcp->memdev = startdev; | |
29b8dd9d | 2537 | fcp->basedev = base; |
eb6e199b | 2538 | fcp->retries = 256; |
d42e1712 | 2539 | fcp->expires = startdev->default_expires * HZ; |
1aae0560 | 2540 | fcp->buildclk = get_tod_clock(); |
1da177e4 | 2541 | fcp->status = DASD_CQR_FILLED; |
d42e1712 | 2542 | |
1da177e4 LT |
2543 | return fcp; |
2544 | } | |
2545 | ||
570d237c JH |
2546 | /* |
2547 | * Wrapper function to build a CCW request depending on input data | |
2548 | */ | |
2549 | static struct dasd_ccw_req * | |
2550 | dasd_eckd_format_build_ccw_req(struct dasd_device *base, | |
8fd57520 JH |
2551 | struct format_data_t *fdata, int enable_pav, |
2552 | int tpm, struct eckd_count *fmt_buffer, int rpt) | |
570d237c | 2553 | { |
8fd57520 JH |
2554 | struct dasd_ccw_req *ccw_req; |
2555 | ||
2556 | if (!fmt_buffer) { | |
2557 | ccw_req = dasd_eckd_build_format(base, fdata, enable_pav); | |
2558 | } else { | |
2559 | if (tpm) | |
2560 | ccw_req = dasd_eckd_build_check_tcw(base, fdata, | |
2561 | enable_pav, | |
2562 | fmt_buffer, rpt); | |
2563 | else | |
2564 | ccw_req = dasd_eckd_build_check(base, fdata, enable_pav, | |
2565 | fmt_buffer, rpt); | |
2566 | } | |
2567 | ||
2568 | return ccw_req; | |
570d237c JH |
2569 | } |
2570 | ||
2571 | /* | |
2572 | * Sanity checks on format_data | |
2573 | */ | |
2574 | static int dasd_eckd_format_sanity_checks(struct dasd_device *base, | |
2575 | struct format_data_t *fdata) | |
d42e1712 | 2576 | { |
543691a4 | 2577 | struct dasd_eckd_private *private = base->private; |
d42e1712 | 2578 | |
d42e1712 SH |
2579 | if (fdata->start_unit >= |
2580 | (private->real_cyl * private->rdc_data.trk_per_cyl)) { | |
2581 | dev_warn(&base->cdev->dev, | |
2582 | "Start track number %u used in formatting is too big\n", | |
2583 | fdata->start_unit); | |
2584 | return -EINVAL; | |
2585 | } | |
2586 | if (fdata->stop_unit >= | |
2587 | (private->real_cyl * private->rdc_data.trk_per_cyl)) { | |
2588 | dev_warn(&base->cdev->dev, | |
2589 | "Stop track number %u used in formatting is too big\n", | |
2590 | fdata->stop_unit); | |
2591 | return -EINVAL; | |
2592 | } | |
2593 | if (fdata->start_unit > fdata->stop_unit) { | |
2594 | dev_warn(&base->cdev->dev, | |
2595 | "Start track %u used in formatting exceeds end track\n", | |
2596 | fdata->start_unit); | |
2597 | return -EINVAL; | |
2598 | } | |
2599 | if (dasd_check_blocksize(fdata->blksize) != 0) { | |
2600 | dev_warn(&base->cdev->dev, | |
2601 | "The DASD cannot be formatted with block size %u\n", | |
2602 | fdata->blksize); | |
2603 | return -EINVAL; | |
2604 | } | |
570d237c JH |
2605 | return 0; |
2606 | } | |
2607 | ||
2608 | /* | |
2609 | * This function will process format_data originally coming from an IOCTL | |
2610 | */ | |
2611 | static int dasd_eckd_format_process_data(struct dasd_device *base, | |
2612 | struct format_data_t *fdata, | |
8fd57520 JH |
2613 | int enable_pav, int tpm, |
2614 | struct eckd_count *fmt_buffer, int rpt, | |
2615 | struct irb *irb) | |
570d237c | 2616 | { |
543691a4 | 2617 | struct dasd_eckd_private *private = base->private; |
570d237c | 2618 | struct dasd_ccw_req *cqr, *n; |
570d237c JH |
2619 | struct list_head format_queue; |
2620 | struct dasd_device *device; | |
8fd57520 | 2621 | char *sense = NULL; |
570d237c JH |
2622 | int old_start, old_stop, format_step; |
2623 | int step, retry; | |
2624 | int rc; | |
2625 | ||
570d237c JH |
2626 | rc = dasd_eckd_format_sanity_checks(base, fdata); |
2627 | if (rc) | |
2628 | return rc; | |
d42e1712 SH |
2629 | |
2630 | INIT_LIST_HEAD(&format_queue); | |
d42e1712 | 2631 | |
46d1c03c | 2632 | old_start = fdata->start_unit; |
29b8dd9d | 2633 | old_stop = fdata->stop_unit; |
d42e1712 | 2634 | |
8fd57520 JH |
2635 | if (!tpm && fmt_buffer != NULL) { |
2636 | /* Command Mode / Format Check */ | |
2637 | format_step = 1; | |
2638 | } else if (tpm && fmt_buffer != NULL) { | |
2639 | /* Transport Mode / Format Check */ | |
2640 | format_step = DASD_CQR_MAX_CCW / rpt; | |
2641 | } else { | |
2642 | /* Normal Formatting */ | |
2643 | format_step = DASD_CQR_MAX_CCW / | |
2644 | recs_per_track(&private->rdc_data, 0, fdata->blksize); | |
2645 | } | |
2646 | ||
46d1c03c JH |
2647 | do { |
2648 | retry = 0; | |
2649 | while (fdata->start_unit <= old_stop) { | |
2650 | step = fdata->stop_unit - fdata->start_unit + 1; | |
2651 | if (step > format_step) { | |
2652 | fdata->stop_unit = | |
2653 | fdata->start_unit + format_step - 1; | |
2654 | } | |
d42e1712 | 2655 | |
570d237c | 2656 | cqr = dasd_eckd_format_build_ccw_req(base, fdata, |
8fd57520 JH |
2657 | enable_pav, tpm, |
2658 | fmt_buffer, rpt); | |
46d1c03c JH |
2659 | if (IS_ERR(cqr)) { |
2660 | rc = PTR_ERR(cqr); | |
2661 | if (rc == -ENOMEM) { | |
2662 | if (list_empty(&format_queue)) | |
2663 | goto out; | |
2664 | /* | |
2665 | * not enough memory available, start | |
2666 | * requests retry after first requests | |
2667 | * were finished | |
2668 | */ | |
2669 | retry = 1; | |
2670 | break; | |
2671 | } | |
2672 | goto out_err; | |
2673 | } | |
2674 | list_add_tail(&cqr->blocklist, &format_queue); | |
d42e1712 | 2675 | |
8fd57520 JH |
2676 | if (fmt_buffer) { |
2677 | step = fdata->stop_unit - fdata->start_unit + 1; | |
2678 | fmt_buffer += rpt * step; | |
2679 | } | |
46d1c03c JH |
2680 | fdata->start_unit = fdata->stop_unit + 1; |
2681 | fdata->stop_unit = old_stop; | |
d42e1712 | 2682 | } |
d42e1712 | 2683 | |
46d1c03c JH |
2684 | rc = dasd_sleep_on_queue(&format_queue); |
2685 | ||
2686 | out_err: | |
2687 | list_for_each_entry_safe(cqr, n, &format_queue, blocklist) { | |
2688 | device = cqr->startdev; | |
543691a4 | 2689 | private = device->private; |
8fd57520 JH |
2690 | |
2691 | if (cqr->status == DASD_CQR_FAILED) { | |
2692 | /* | |
2693 | * Only get sense data if called by format | |
2694 | * check | |
2695 | */ | |
2696 | if (fmt_buffer && irb) { | |
2697 | sense = dasd_get_sense(&cqr->irb); | |
2698 | memcpy(irb, &cqr->irb, sizeof(*irb)); | |
2699 | } | |
46d1c03c | 2700 | rc = -EIO; |
8fd57520 | 2701 | } |
46d1c03c JH |
2702 | list_del_init(&cqr->blocklist); |
2703 | dasd_sfree_request(cqr, device); | |
2704 | private->count--; | |
2705 | } | |
d42e1712 | 2706 | |
8fd57520 | 2707 | if (rc && rc != -EIO) |
46d1c03c | 2708 | goto out; |
8fd57520 JH |
2709 | if (rc == -EIO) { |
2710 | /* | |
2711 | * In case fewer than the expected records are on the | |
2712 | * track, we will most likely get a 'No Record Found' | |
2713 | * error (in command mode) or a 'File Protected' error | |
2714 | * (in transport mode). Those particular cases shouldn't | |
2715 | * pass the -EIO to the IOCTL, therefore reset the rc | |
2716 | * and continue. | |
2717 | */ | |
2718 | if (sense && | |
2719 | (sense[1] & SNS1_NO_REC_FOUND || | |
2720 | sense[1] & SNS1_FILE_PROTECTED)) | |
2721 | retry = 1; | |
2722 | else | |
2723 | goto out; | |
2724 | } | |
d42e1712 | 2725 | |
46d1c03c | 2726 | } while (retry); |
29b8dd9d | 2727 | |
46d1c03c JH |
2728 | out: |
2729 | fdata->start_unit = old_start; | |
2730 | fdata->stop_unit = old_stop; | |
d42e1712 SH |
2731 | |
2732 | return rc; | |
2733 | } | |
2734 | ||
570d237c JH |
2735 | static int dasd_eckd_format_device(struct dasd_device *base, |
2736 | struct format_data_t *fdata, int enable_pav) | |
2737 | { | |
8fd57520 JH |
2738 | return dasd_eckd_format_process_data(base, fdata, enable_pav, 0, NULL, |
2739 | 0, NULL); | |
2740 | } | |
2741 | ||
2742 | /* | |
2743 | * Helper function to count consecutive records of a single track. | |
2744 | */ | |
2745 | static int dasd_eckd_count_records(struct eckd_count *fmt_buffer, int start, | |
2746 | int max) | |
2747 | { | |
2748 | int head; | |
2749 | int i; | |
2750 | ||
2751 | head = fmt_buffer[start].head; | |
2752 | ||
2753 | /* | |
2754 | * There are 3 conditions where we stop counting: | |
2755 | * - if data reoccurs (same head and record may reoccur), which may | |
2756 | * happen due to the way DASD_ECKD_CCW_READ_COUNT works | |
2757 | * - when the head changes, because we're iterating over several tracks | |
2758 | * then (DASD_ECKD_CCW_READ_COUNT_MT) | |
2759 | * - when we've reached the end of sensible data in the buffer (the | |
2760 | * record will be 0 then) | |
2761 | */ | |
2762 | for (i = start; i < max; i++) { | |
2763 | if (i > start) { | |
2764 | if ((fmt_buffer[i].head == head && | |
2765 | fmt_buffer[i].record == 1) || | |
2766 | fmt_buffer[i].head != head || | |
2767 | fmt_buffer[i].record == 0) | |
2768 | break; | |
2769 | } | |
2770 | } | |
2771 | ||
2772 | return i - start; | |
2773 | } | |
2774 | ||
2775 | /* | |
2776 | * Evaluate a given range of tracks. Data like number of records, blocksize, | |
2777 | * record ids, and key length are compared with expected data. | |
2778 | * | |
2779 | * If a mismatch occurs, the corresponding error bit is set, as well as | |
2780 | * additional information, depending on the error. | |
2781 | */ | |
2782 | static void dasd_eckd_format_evaluate_tracks(struct eckd_count *fmt_buffer, | |
2783 | struct format_check_t *cdata, | |
2784 | int rpt_max, int rpt_exp, | |
2785 | int trk_per_cyl, int tpm) | |
2786 | { | |
2787 | struct ch_t geo; | |
2788 | int max_entries; | |
2789 | int count = 0; | |
2790 | int trkcount; | |
2791 | int blksize; | |
2792 | int pos = 0; | |
2793 | int i, j; | |
2794 | int kl; | |
2795 | ||
2796 | trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; | |
2797 | max_entries = trkcount * rpt_max; | |
2798 | ||
2799 | for (i = cdata->expect.start_unit; i <= cdata->expect.stop_unit; i++) { | |
2800 | /* Calculate the correct next starting position in the buffer */ | |
2801 | if (tpm) { | |
2802 | while (fmt_buffer[pos].record == 0 && | |
2803 | fmt_buffer[pos].dl == 0) { | |
2804 | if (pos++ > max_entries) | |
2805 | break; | |
2806 | } | |
2807 | } else { | |
2808 | if (i != cdata->expect.start_unit) | |
2809 | pos += rpt_max - count; | |
2810 | } | |
2811 | ||
2812 | /* Calculate the expected geo values for the current track */ | |
2813 | set_ch_t(&geo, i / trk_per_cyl, i % trk_per_cyl); | |
2814 | ||
2815 | /* Count and check number of records */ | |
2816 | count = dasd_eckd_count_records(fmt_buffer, pos, pos + rpt_max); | |
2817 | ||
2818 | if (count < rpt_exp) { | |
2819 | cdata->result = DASD_FMT_ERR_TOO_FEW_RECORDS; | |
2820 | break; | |
2821 | } | |
2822 | if (count > rpt_exp) { | |
2823 | cdata->result = DASD_FMT_ERR_TOO_MANY_RECORDS; | |
2824 | break; | |
2825 | } | |
2826 | ||
2827 | for (j = 0; j < count; j++, pos++) { | |
2828 | blksize = cdata->expect.blksize; | |
2829 | kl = 0; | |
2830 | ||
2831 | /* | |
2832 | * Set special values when checking CDL formatted | |
2833 | * devices. | |
2834 | */ | |
2835 | if ((cdata->expect.intensity & 0x08) && | |
2836 | geo.cyl == 0 && geo.head == 0) { | |
2837 | if (j < 3) { | |
2838 | blksize = sizes_trk0[j] - 4; | |
2839 | kl = 4; | |
2840 | } | |
2841 | } | |
2842 | if ((cdata->expect.intensity & 0x08) && | |
2843 | geo.cyl == 0 && geo.head == 1) { | |
2844 | blksize = LABEL_SIZE - 44; | |
2845 | kl = 44; | |
2846 | } | |
2847 | ||
2848 | /* Check blocksize */ | |
2849 | if (fmt_buffer[pos].dl != blksize) { | |
2850 | cdata->result = DASD_FMT_ERR_BLKSIZE; | |
2851 | goto out; | |
2852 | } | |
2853 | /* Check if key length is 0 */ | |
2854 | if (fmt_buffer[pos].kl != kl) { | |
2855 | cdata->result = DASD_FMT_ERR_KEY_LENGTH; | |
2856 | goto out; | |
2857 | } | |
2858 | /* Check if record_id is correct */ | |
2859 | if (fmt_buffer[pos].cyl != geo.cyl || | |
2860 | fmt_buffer[pos].head != geo.head || | |
2861 | fmt_buffer[pos].record != (j + 1)) { | |
2862 | cdata->result = DASD_FMT_ERR_RECORD_ID; | |
2863 | goto out; | |
2864 | } | |
2865 | } | |
2866 | } | |
2867 | ||
2868 | out: | |
2869 | /* | |
2870 | * In case of no errors, we need to decrease by one | |
2871 | * to get the correct positions. | |
2872 | */ | |
2873 | if (!cdata->result) { | |
2874 | i--; | |
2875 | pos--; | |
2876 | } | |
2877 | ||
2878 | cdata->unit = i; | |
2879 | cdata->num_records = count; | |
2880 | cdata->rec = fmt_buffer[pos].record; | |
2881 | cdata->blksize = fmt_buffer[pos].dl; | |
2882 | cdata->key_length = fmt_buffer[pos].kl; | |
2883 | } | |
2884 | ||
2885 | /* | |
2886 | * Check the format of a range of tracks of a DASD. | |
2887 | */ | |
2888 | static int dasd_eckd_check_device_format(struct dasd_device *base, | |
2889 | struct format_check_t *cdata, | |
2890 | int enable_pav) | |
2891 | { | |
2892 | struct dasd_eckd_private *private = base->private; | |
2893 | struct eckd_count *fmt_buffer; | |
2894 | struct irb irb; | |
2895 | int rpt_max, rpt_exp; | |
2896 | int fmt_buffer_size; | |
2897 | int trk_per_cyl; | |
2898 | int trkcount; | |
2899 | int tpm = 0; | |
2900 | int rc; | |
2901 | ||
2902 | trk_per_cyl = private->rdc_data.trk_per_cyl; | |
2903 | ||
2904 | /* Get maximum and expected amount of records per track */ | |
2905 | rpt_max = recs_per_track(&private->rdc_data, 0, 512) + 1; | |
2906 | rpt_exp = recs_per_track(&private->rdc_data, 0, cdata->expect.blksize); | |
2907 | ||
2908 | trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; | |
2909 | fmt_buffer_size = trkcount * rpt_max * sizeof(struct eckd_count); | |
2910 | ||
2911 | fmt_buffer = kzalloc(fmt_buffer_size, GFP_KERNEL | GFP_DMA); | |
2912 | if (!fmt_buffer) | |
2913 | return -ENOMEM; | |
2914 | ||
2915 | /* | |
2916 | * A certain FICON feature subset is needed to operate in transport | |
2917 | * mode. Additionally, the support for transport mode is implicitly | |
2918 | * checked by comparing the buffer size with fcx_max_data. As long as | |
2919 | * the buffer size is smaller we can operate in transport mode and | |
2920 | * process multiple tracks. If not, only one track at once is being | |
2921 | * processed using command mode. | |
2922 | */ | |
2923 | if ((private->features.feature[40] & 0x04) && | |
2924 | fmt_buffer_size <= private->fcx_max_data) | |
2925 | tpm = 1; | |
2926 | ||
2927 | rc = dasd_eckd_format_process_data(base, &cdata->expect, enable_pav, | |
2928 | tpm, fmt_buffer, rpt_max, &irb); | |
2929 | if (rc && rc != -EIO) | |
2930 | goto out; | |
2931 | if (rc == -EIO) { | |
2932 | /* | |
2933 | * If our first attempt with transport mode enabled comes back | |
2934 | * with an incorrect length error, we're going to retry the | |
2935 | * check with command mode. | |
2936 | */ | |
2937 | if (tpm && scsw_cstat(&irb.scsw) == 0x40) { | |
2938 | tpm = 0; | |
2939 | rc = dasd_eckd_format_process_data(base, &cdata->expect, | |
2940 | enable_pav, tpm, | |
2941 | fmt_buffer, rpt_max, | |
2942 | &irb); | |
2943 | if (rc) | |
2944 | goto out; | |
2945 | } else { | |
2946 | goto out; | |
2947 | } | |
2948 | } | |
2949 | ||
2950 | dasd_eckd_format_evaluate_tracks(fmt_buffer, cdata, rpt_max, rpt_exp, | |
2951 | trk_per_cyl, tpm); | |
2952 | ||
2953 | out: | |
2954 | kfree(fmt_buffer); | |
2955 | ||
2956 | return rc; | |
570d237c JH |
2957 | } |
2958 | ||
8e09f215 | 2959 | static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) |
1da177e4 | 2960 | { |
a2ace466 HR |
2961 | if (cqr->retries < 0) { |
2962 | cqr->status = DASD_CQR_FAILED; | |
2963 | return; | |
2964 | } | |
8e09f215 SW |
2965 | cqr->status = DASD_CQR_FILLED; |
2966 | if (cqr->block && (cqr->startdev != cqr->block->base)) { | |
2967 | dasd_eckd_reset_ccw_to_base_io(cqr); | |
2968 | cqr->startdev = cqr->block->base; | |
a4d26c6a | 2969 | cqr->lpm = cqr->block->base->path_data.opm; |
1da177e4 | 2970 | } |
8e09f215 | 2971 | }; |
1da177e4 LT |
2972 | |
2973 | static dasd_erp_fn_t | |
2974 | dasd_eckd_erp_action(struct dasd_ccw_req * cqr) | |
2975 | { | |
8e09f215 | 2976 | struct dasd_device *device = (struct dasd_device *) cqr->startdev; |
1da177e4 LT |
2977 | struct ccw_device *cdev = device->cdev; |
2978 | ||
2979 | switch (cdev->id.cu_type) { | |
2980 | case 0x3990: | |
2981 | case 0x2105: | |
2982 | case 0x2107: | |
2983 | case 0x1750: | |
2984 | return dasd_3990_erp_action; | |
2985 | case 0x9343: | |
2986 | case 0x3880: | |
2987 | default: | |
2988 | return dasd_default_erp_action; | |
2989 | } | |
2990 | } | |
2991 | ||
2992 | static dasd_erp_fn_t | |
2993 | dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) | |
2994 | { | |
2995 | return dasd_default_erp_postaction; | |
2996 | } | |
2997 | ||
5a27e60d SW |
2998 | static void dasd_eckd_check_for_device_change(struct dasd_device *device, |
2999 | struct dasd_ccw_req *cqr, | |
3000 | struct irb *irb) | |
8e09f215 SW |
3001 | { |
3002 | char mask; | |
f3eb5384 | 3003 | char *sense = NULL; |
543691a4 | 3004 | struct dasd_eckd_private *private = device->private; |
8e09f215 SW |
3005 | |
3006 | /* first of all check for state change pending interrupt */ | |
3007 | mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; | |
f3eb5384 | 3008 | if ((scsw_dstat(&irb->scsw) & mask) == mask) { |
c8d1c0ff SH |
3009 | /* |
3010 | * for alias only, not in offline processing | |
3011 | * and only if not suspended | |
3012 | */ | |
501183f2 | 3013 | if (!device->block && private->lcu && |
25e2cf1c | 3014 | device->state == DASD_STATE_ONLINE && |
c8d1c0ff SH |
3015 | !test_bit(DASD_FLAG_OFFLINE, &device->flags) && |
3016 | !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { | |
501183f2 SH |
3017 | /* schedule worker to reload device */ |
3018 | dasd_reload_device(device); | |
3019 | } | |
8e09f215 SW |
3020 | dasd_generic_handle_state_change(device); |
3021 | return; | |
3022 | } | |
3023 | ||
a5a0061f | 3024 | sense = dasd_get_sense(irb); |
5a27e60d SW |
3025 | if (!sense) |
3026 | return; | |
3027 | ||
3028 | /* summary unit check */ | |
c7a29e56 | 3029 | if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && |
a5a0061f | 3030 | (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { |
59a9ed5f SH |
3031 | if (test_and_set_bit(DASD_FLAG_SUC, &device->flags)) { |
3032 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", | |
3033 | "eckd suc: device already notified"); | |
3034 | return; | |
3035 | } | |
3036 | sense = dasd_get_sense(irb); | |
3037 | if (!sense) { | |
3038 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", | |
3039 | "eckd suc: no reason code available"); | |
3040 | clear_bit(DASD_FLAG_SUC, &device->flags); | |
3041 | return; | |
3042 | ||
3043 | } | |
3044 | private->suc_reason = sense[8]; | |
3045 | DBF_DEV_EVENT(DBF_NOTICE, device, "%s %x", | |
3046 | "eckd handle summary unit check: reason", | |
3047 | private->suc_reason); | |
3048 | dasd_get_device(device); | |
3049 | if (!schedule_work(&device->suc_work)) | |
3050 | dasd_put_device(device); | |
3051 | ||
8e09f215 SW |
3052 | return; |
3053 | } | |
3054 | ||
f60c768c | 3055 | /* service information message SIM */ |
5a27e60d | 3056 | if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && |
f3eb5384 SW |
3057 | ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { |
3058 | dasd_3990_erp_handle_sim(device, sense); | |
f60c768c SH |
3059 | return; |
3060 | } | |
3061 | ||
5a27e60d SW |
3062 | /* loss of device reservation is handled via base devices only |
3063 | * as alias devices may be used with several bases | |
3064 | */ | |
c7a29e56 SW |
3065 | if (device->block && (sense[27] & DASD_SENSE_BIT_0) && |
3066 | (sense[7] == 0x3F) && | |
5a27e60d SW |
3067 | (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && |
3068 | test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { | |
3069 | if (device->features & DASD_FEATURE_FAILONSLCK) | |
3070 | set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); | |
3071 | clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); | |
3072 | dev_err(&device->cdev->dev, | |
3073 | "The device reservation was lost\n"); | |
ada3df91 | 3074 | } |
5a27e60d | 3075 | } |
f3eb5384 SW |
3076 | |
3077 | static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( | |
3078 | struct dasd_device *startdev, | |
8e09f215 | 3079 | struct dasd_block *block, |
f3eb5384 SW |
3080 | struct request *req, |
3081 | sector_t first_rec, | |
3082 | sector_t last_rec, | |
3083 | sector_t first_trk, | |
3084 | sector_t last_trk, | |
3085 | unsigned int first_offs, | |
3086 | unsigned int last_offs, | |
3087 | unsigned int blk_per_trk, | |
3088 | unsigned int blksize) | |
1da177e4 LT |
3089 | { |
3090 | struct dasd_eckd_private *private; | |
3091 | unsigned long *idaws; | |
3092 | struct LO_eckd_data *LO_data; | |
3093 | struct dasd_ccw_req *cqr; | |
3094 | struct ccw1 *ccw; | |
5705f702 | 3095 | struct req_iterator iter; |
7988613b | 3096 | struct bio_vec bv; |
1da177e4 | 3097 | char *dst; |
f3eb5384 | 3098 | unsigned int off; |
1da177e4 | 3099 | int count, cidaw, cplength, datasize; |
f3eb5384 | 3100 | sector_t recid; |
1da177e4 | 3101 | unsigned char cmd, rcmd; |
8e09f215 SW |
3102 | int use_prefix; |
3103 | struct dasd_device *basedev; | |
1da177e4 | 3104 | |
8e09f215 | 3105 | basedev = block->base; |
543691a4 | 3106 | private = basedev->private; |
1da177e4 LT |
3107 | if (rq_data_dir(req) == READ) |
3108 | cmd = DASD_ECKD_CCW_READ_MT; | |
3109 | else if (rq_data_dir(req) == WRITE) | |
3110 | cmd = DASD_ECKD_CCW_WRITE_MT; | |
3111 | else | |
3112 | return ERR_PTR(-EINVAL); | |
f3eb5384 | 3113 | |
1da177e4 LT |
3114 | /* Check struct bio and count the number of blocks for the request. */ |
3115 | count = 0; | |
3116 | cidaw = 0; | |
5705f702 | 3117 | rq_for_each_segment(bv, req, iter) { |
7988613b | 3118 | if (bv.bv_len & (blksize - 1)) |
6c92e699 JA |
3119 | /* Eckd can only do full blocks. */ |
3120 | return ERR_PTR(-EINVAL); | |
7988613b | 3121 | count += bv.bv_len >> (block->s2b_shift + 9); |
7988613b KO |
3122 | if (idal_is_needed (page_address(bv.bv_page), bv.bv_len)) |
3123 | cidaw += bv.bv_len >> (block->s2b_shift + 9); | |
1da177e4 LT |
3124 | } |
3125 | /* Paranoia. */ | |
3126 | if (count != last_rec - first_rec + 1) | |
3127 | return ERR_PTR(-EINVAL); | |
8e09f215 SW |
3128 | |
3129 | /* use the prefix command if available */ | |
3130 | use_prefix = private->features.feature[8] & 0x01; | |
3131 | if (use_prefix) { | |
3132 | /* 1x prefix + number of blocks */ | |
3133 | cplength = 2 + count; | |
3134 | /* 1x prefix + cidaws*sizeof(long) */ | |
3135 | datasize = sizeof(struct PFX_eckd_data) + | |
3136 | sizeof(struct LO_eckd_data) + | |
3137 | cidaw * sizeof(unsigned long); | |
3138 | } else { | |
3139 | /* 1x define extent + 1x locate record + number of blocks */ | |
3140 | cplength = 2 + count; | |
3141 | /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ | |
3142 | datasize = sizeof(struct DE_eckd_data) + | |
3143 | sizeof(struct LO_eckd_data) + | |
3144 | cidaw * sizeof(unsigned long); | |
3145 | } | |
1da177e4 LT |
3146 | /* Find out the number of additional locate record ccws for cdl. */ |
3147 | if (private->uses_cdl && first_rec < 2*blk_per_trk) { | |
3148 | if (last_rec >= 2*blk_per_trk) | |
3149 | count = 2*blk_per_trk - first_rec; | |
3150 | cplength += count; | |
3151 | datasize += count*sizeof(struct LO_eckd_data); | |
3152 | } | |
3153 | /* Allocate the ccw request. */ | |
68b781fe SH |
3154 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, |
3155 | startdev); | |
1da177e4 LT |
3156 | if (IS_ERR(cqr)) |
3157 | return cqr; | |
3158 | ccw = cqr->cpaddr; | |
8e09f215 SW |
3159 | /* First ccw is define extent or prefix. */ |
3160 | if (use_prefix) { | |
3161 | if (prefix(ccw++, cqr->data, first_trk, | |
3162 | last_trk, cmd, basedev, startdev) == -EAGAIN) { | |
3163 | /* Clock not in sync and XRC is enabled. | |
3164 | * Try again later. | |
3165 | */ | |
3166 | dasd_sfree_request(cqr, startdev); | |
3167 | return ERR_PTR(-EAGAIN); | |
3168 | } | |
3169 | idaws = (unsigned long *) (cqr->data + | |
3170 | sizeof(struct PFX_eckd_data)); | |
3171 | } else { | |
3172 | if (define_extent(ccw++, cqr->data, first_trk, | |
b38f27e8 | 3173 | last_trk, cmd, basedev) == -EAGAIN) { |
8e09f215 SW |
3174 | /* Clock not in sync and XRC is enabled. |
3175 | * Try again later. | |
3176 | */ | |
3177 | dasd_sfree_request(cqr, startdev); | |
3178 | return ERR_PTR(-EAGAIN); | |
3179 | } | |
3180 | idaws = (unsigned long *) (cqr->data + | |
3181 | sizeof(struct DE_eckd_data)); | |
d54853ef | 3182 | } |
1da177e4 | 3183 | /* Build locate_record+read/write/ccws. */ |
1da177e4 LT |
3184 | LO_data = (struct LO_eckd_data *) (idaws + cidaw); |
3185 | recid = first_rec; | |
3186 | if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { | |
3187 | /* Only standard blocks so there is just one locate record. */ | |
3188 | ccw[-1].flags |= CCW_FLAG_CC; | |
3189 | locate_record(ccw++, LO_data++, first_trk, first_offs + 1, | |
8e09f215 | 3190 | last_rec - recid + 1, cmd, basedev, blksize); |
1da177e4 | 3191 | } |
5705f702 | 3192 | rq_for_each_segment(bv, req, iter) { |
7988613b | 3193 | dst = page_address(bv.bv_page) + bv.bv_offset; |
1da177e4 LT |
3194 | if (dasd_page_cache) { |
3195 | char *copy = kmem_cache_alloc(dasd_page_cache, | |
441e143e | 3196 | GFP_DMA | __GFP_NOWARN); |
1da177e4 | 3197 | if (copy && rq_data_dir(req) == WRITE) |
7988613b | 3198 | memcpy(copy + bv.bv_offset, dst, bv.bv_len); |
1da177e4 | 3199 | if (copy) |
7988613b | 3200 | dst = copy + bv.bv_offset; |
1da177e4 | 3201 | } |
7988613b | 3202 | for (off = 0; off < bv.bv_len; off += blksize) { |
1da177e4 LT |
3203 | sector_t trkid = recid; |
3204 | unsigned int recoffs = sector_div(trkid, blk_per_trk); | |
3205 | rcmd = cmd; | |
3206 | count = blksize; | |
3207 | /* Locate record for cdl special block ? */ | |
3208 | if (private->uses_cdl && recid < 2*blk_per_trk) { | |
3209 | if (dasd_eckd_cdl_special(blk_per_trk, recid)){ | |
3210 | rcmd |= 0x8; | |
3211 | count = dasd_eckd_cdl_reclen(recid); | |
ec5883ab HH |
3212 | if (count < blksize && |
3213 | rq_data_dir(req) == READ) | |
1da177e4 LT |
3214 | memset(dst + count, 0xe5, |
3215 | blksize - count); | |
3216 | } | |
3217 | ccw[-1].flags |= CCW_FLAG_CC; | |
3218 | locate_record(ccw++, LO_data++, | |
3219 | trkid, recoffs + 1, | |
8e09f215 | 3220 | 1, rcmd, basedev, count); |
1da177e4 LT |
3221 | } |
3222 | /* Locate record for standard blocks ? */ | |
3223 | if (private->uses_cdl && recid == 2*blk_per_trk) { | |
3224 | ccw[-1].flags |= CCW_FLAG_CC; | |
3225 | locate_record(ccw++, LO_data++, | |
3226 | trkid, recoffs + 1, | |
3227 | last_rec - recid + 1, | |
8e09f215 | 3228 | cmd, basedev, count); |
1da177e4 LT |
3229 | } |
3230 | /* Read/write ccw. */ | |
3231 | ccw[-1].flags |= CCW_FLAG_CC; | |
3232 | ccw->cmd_code = rcmd; | |
3233 | ccw->count = count; | |
3234 | if (idal_is_needed(dst, blksize)) { | |
3235 | ccw->cda = (__u32)(addr_t) idaws; | |
3236 | ccw->flags = CCW_FLAG_IDA; | |
3237 | idaws = idal_create_words(idaws, dst, blksize); | |
3238 | } else { | |
3239 | ccw->cda = (__u32)(addr_t) dst; | |
3240 | ccw->flags = 0; | |
3241 | } | |
3242 | ccw++; | |
3243 | dst += blksize; | |
3244 | recid++; | |
3245 | } | |
3246 | } | |
13de227b HS |
3247 | if (blk_noretry_request(req) || |
3248 | block->base->features & DASD_FEATURE_FAILFAST) | |
1c01b8a5 | 3249 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
8e09f215 SW |
3250 | cqr->startdev = startdev; |
3251 | cqr->memdev = startdev; | |
3252 | cqr->block = block; | |
7c8faa86 | 3253 | cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ |
a4d26c6a | 3254 | cqr->lpm = startdev->path_data.ppm; |
1f1ee9ad | 3255 | cqr->retries = startdev->default_retries; |
1aae0560 | 3256 | cqr->buildclk = get_tod_clock(); |
1da177e4 LT |
3257 | cqr->status = DASD_CQR_FILLED; |
3258 | return cqr; | |
3259 | } | |
3260 | ||
f3eb5384 SW |
3261 | static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( |
3262 | struct dasd_device *startdev, | |
3263 | struct dasd_block *block, | |
3264 | struct request *req, | |
3265 | sector_t first_rec, | |
3266 | sector_t last_rec, | |
3267 | sector_t first_trk, | |
3268 | sector_t last_trk, | |
3269 | unsigned int first_offs, | |
3270 | unsigned int last_offs, | |
3271 | unsigned int blk_per_trk, | |
3272 | unsigned int blksize) | |
3273 | { | |
f3eb5384 SW |
3274 | unsigned long *idaws; |
3275 | struct dasd_ccw_req *cqr; | |
3276 | struct ccw1 *ccw; | |
3277 | struct req_iterator iter; | |
7988613b | 3278 | struct bio_vec bv; |
f3eb5384 SW |
3279 | char *dst, *idaw_dst; |
3280 | unsigned int cidaw, cplength, datasize; | |
3281 | unsigned int tlf; | |
3282 | sector_t recid; | |
3283 | unsigned char cmd; | |
3284 | struct dasd_device *basedev; | |
3285 | unsigned int trkcount, count, count_to_trk_end; | |
3286 | unsigned int idaw_len, seg_len, part_len, len_to_track_end; | |
3287 | unsigned char new_track, end_idaw; | |
3288 | sector_t trkid; | |
3289 | unsigned int recoffs; | |
3290 | ||
3291 | basedev = block->base; | |
f3eb5384 SW |
3292 | if (rq_data_dir(req) == READ) |
3293 | cmd = DASD_ECKD_CCW_READ_TRACK_DATA; | |
3294 | else if (rq_data_dir(req) == WRITE) | |
3295 | cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; | |
3296 | else | |
3297 | return ERR_PTR(-EINVAL); | |
3298 | ||
3299 | /* Track based I/O needs IDAWs for each page, and not just for | |
3300 | * 64 bit addresses. We need additional idals for pages | |
3301 | * that get filled from two tracks, so we use the number | |
3302 | * of records as upper limit. | |
3303 | */ | |
3304 | cidaw = last_rec - first_rec + 1; | |
3305 | trkcount = last_trk - first_trk + 1; | |
3306 | ||
3307 | /* 1x prefix + one read/write ccw per track */ | |
3308 | cplength = 1 + trkcount; | |
3309 | ||
3310 | /* on 31-bit we need space for two 32 bit addresses per page | |
3311 | * on 64-bit one 64 bit address | |
3312 | */ | |
3313 | datasize = sizeof(struct PFX_eckd_data) + | |
3314 | cidaw * sizeof(unsigned long long); | |
3315 | ||
3316 | /* Allocate the ccw request. */ | |
68b781fe SH |
3317 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, |
3318 | startdev); | |
f3eb5384 SW |
3319 | if (IS_ERR(cqr)) |
3320 | return cqr; | |
3321 | ccw = cqr->cpaddr; | |
3322 | /* transfer length factor: how many bytes to read from the last track */ | |
3323 | if (first_trk == last_trk) | |
3324 | tlf = last_offs - first_offs + 1; | |
3325 | else | |
3326 | tlf = last_offs + 1; | |
3327 | tlf *= blksize; | |
3328 | ||
3329 | if (prefix_LRE(ccw++, cqr->data, first_trk, | |
3330 | last_trk, cmd, basedev, startdev, | |
3331 | 1 /* format */, first_offs + 1, | |
3332 | trkcount, blksize, | |
3333 | tlf) == -EAGAIN) { | |
3334 | /* Clock not in sync and XRC is enabled. | |
3335 | * Try again later. | |
3336 | */ | |
3337 | dasd_sfree_request(cqr, startdev); | |
3338 | return ERR_PTR(-EAGAIN); | |
3339 | } | |
3340 | ||
3341 | /* | |
3342 | * The translation of request into ccw programs must meet the | |
3343 | * following conditions: | |
3344 | * - all idaws but the first and the last must address full pages | |
3345 | * (or 2K blocks on 31-bit) | |
3346 | * - the scope of a ccw and it's idal ends with the track boundaries | |
3347 | */ | |
3348 | idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); | |
3349 | recid = first_rec; | |
3350 | new_track = 1; | |
3351 | end_idaw = 0; | |
3352 | len_to_track_end = 0; | |
246ccea1 | 3353 | idaw_dst = NULL; |
f3eb5384 SW |
3354 | idaw_len = 0; |
3355 | rq_for_each_segment(bv, req, iter) { | |
7988613b KO |
3356 | dst = page_address(bv.bv_page) + bv.bv_offset; |
3357 | seg_len = bv.bv_len; | |
f3eb5384 SW |
3358 | while (seg_len) { |
3359 | if (new_track) { | |
3360 | trkid = recid; | |
3361 | recoffs = sector_div(trkid, blk_per_trk); | |
3362 | count_to_trk_end = blk_per_trk - recoffs; | |
3363 | count = min((last_rec - recid + 1), | |
3364 | (sector_t)count_to_trk_end); | |
3365 | len_to_track_end = count * blksize; | |
3366 | ccw[-1].flags |= CCW_FLAG_CC; | |
3367 | ccw->cmd_code = cmd; | |
3368 | ccw->count = len_to_track_end; | |
3369 | ccw->cda = (__u32)(addr_t)idaws; | |
3370 | ccw->flags = CCW_FLAG_IDA; | |
3371 | ccw++; | |
3372 | recid += count; | |
3373 | new_track = 0; | |
52db45c3 SW |
3374 | /* first idaw for a ccw may start anywhere */ |
3375 | if (!idaw_dst) | |
3376 | idaw_dst = dst; | |
f3eb5384 | 3377 | } |
52db45c3 SW |
3378 | /* If we start a new idaw, we must make sure that it |
3379 | * starts on an IDA_BLOCK_SIZE boundary. | |
f3eb5384 SW |
3380 | * If we continue an idaw, we must make sure that the |
3381 | * current segment begins where the so far accumulated | |
3382 | * idaw ends | |
3383 | */ | |
52db45c3 SW |
3384 | if (!idaw_dst) { |
3385 | if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { | |
3386 | dasd_sfree_request(cqr, startdev); | |
3387 | return ERR_PTR(-ERANGE); | |
3388 | } else | |
3389 | idaw_dst = dst; | |
3390 | } | |
f3eb5384 SW |
3391 | if ((idaw_dst + idaw_len) != dst) { |
3392 | dasd_sfree_request(cqr, startdev); | |
3393 | return ERR_PTR(-ERANGE); | |
3394 | } | |
3395 | part_len = min(seg_len, len_to_track_end); | |
3396 | seg_len -= part_len; | |
3397 | dst += part_len; | |
3398 | idaw_len += part_len; | |
3399 | len_to_track_end -= part_len; | |
3400 | /* collected memory area ends on an IDA_BLOCK border, | |
3401 | * -> create an idaw | |
3402 | * idal_create_words will handle cases where idaw_len | |
3403 | * is larger then IDA_BLOCK_SIZE | |
3404 | */ | |
3405 | if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) | |
3406 | end_idaw = 1; | |
3407 | /* We also need to end the idaw at track end */ | |
3408 | if (!len_to_track_end) { | |
3409 | new_track = 1; | |
3410 | end_idaw = 1; | |
3411 | } | |
3412 | if (end_idaw) { | |
3413 | idaws = idal_create_words(idaws, idaw_dst, | |
3414 | idaw_len); | |
246ccea1 | 3415 | idaw_dst = NULL; |
f3eb5384 SW |
3416 | idaw_len = 0; |
3417 | end_idaw = 0; | |
3418 | } | |
3419 | } | |
3420 | } | |
3421 | ||
3422 | if (blk_noretry_request(req) || | |
3423 | block->base->features & DASD_FEATURE_FAILFAST) | |
3424 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); | |
3425 | cqr->startdev = startdev; | |
3426 | cqr->memdev = startdev; | |
3427 | cqr->block = block; | |
7c8faa86 | 3428 | cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ |
a4d26c6a | 3429 | cqr->lpm = startdev->path_data.ppm; |
1f1ee9ad | 3430 | cqr->retries = startdev->default_retries; |
1aae0560 | 3431 | cqr->buildclk = get_tod_clock(); |
f3eb5384 SW |
3432 | cqr->status = DASD_CQR_FILLED; |
3433 | return cqr; | |
3434 | } | |
3435 | ||
3436 | static int prepare_itcw(struct itcw *itcw, | |
3437 | unsigned int trk, unsigned int totrk, int cmd, | |
3438 | struct dasd_device *basedev, | |
3439 | struct dasd_device *startdev, | |
3440 | unsigned int rec_on_trk, int count, | |
3441 | unsigned int blksize, | |
3442 | unsigned int total_data_size, | |
3443 | unsigned int tlf, | |
3444 | unsigned int blk_per_trk) | |
3445 | { | |
3446 | struct PFX_eckd_data pfxdata; | |
3447 | struct dasd_eckd_private *basepriv, *startpriv; | |
3448 | struct DE_eckd_data *dedata; | |
3449 | struct LRE_eckd_data *lredata; | |
3450 | struct dcw *dcw; | |
3451 | ||
3452 | u32 begcyl, endcyl; | |
3453 | u16 heads, beghead, endhead; | |
3454 | u8 pfx_cmd; | |
3455 | ||
3456 | int rc = 0; | |
3457 | int sector = 0; | |
3458 | int dn, d; | |
3459 | ||
3460 | ||
3461 | /* setup prefix data */ | |
543691a4 SO |
3462 | basepriv = basedev->private; |
3463 | startpriv = startdev->private; | |
f3eb5384 SW |
3464 | dedata = &pfxdata.define_extent; |
3465 | lredata = &pfxdata.locate_record; | |
3466 | ||
3467 | memset(&pfxdata, 0, sizeof(pfxdata)); | |
3468 | pfxdata.format = 1; /* PFX with LRE */ | |
3469 | pfxdata.base_address = basepriv->ned->unit_addr; | |
3470 | pfxdata.base_lss = basepriv->ned->ID; | |
3471 | pfxdata.validity.define_extent = 1; | |
3472 | ||
3473 | /* private uid is kept up to date, conf_data may be outdated */ | |
3474 | if (startpriv->uid.type != UA_BASE_DEVICE) { | |
3475 | pfxdata.validity.verify_base = 1; | |
3476 | if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) | |
3477 | pfxdata.validity.hyper_pav = 1; | |
3478 | } | |
3479 | ||
3480 | switch (cmd) { | |
3481 | case DASD_ECKD_CCW_READ_TRACK_DATA: | |
3482 | dedata->mask.perm = 0x1; | |
3483 | dedata->attributes.operation = basepriv->attrib.operation; | |
3484 | dedata->blk_size = blksize; | |
3485 | dedata->ga_extended |= 0x42; | |
3486 | lredata->operation.orientation = 0x0; | |
3487 | lredata->operation.operation = 0x0C; | |
3488 | lredata->auxiliary.check_bytes = 0x01; | |
3489 | pfx_cmd = DASD_ECKD_CCW_PFX_READ; | |
3490 | break; | |
3491 | case DASD_ECKD_CCW_WRITE_TRACK_DATA: | |
3492 | dedata->mask.perm = 0x02; | |
3493 | dedata->attributes.operation = basepriv->attrib.operation; | |
3494 | dedata->blk_size = blksize; | |
3495 | rc = check_XRC_on_prefix(&pfxdata, basedev); | |
3496 | dedata->ga_extended |= 0x42; | |
3497 | lredata->operation.orientation = 0x0; | |
3498 | lredata->operation.operation = 0x3F; | |
3499 | lredata->extended_operation = 0x23; | |
3500 | lredata->auxiliary.check_bytes = 0x2; | |
3501 | pfx_cmd = DASD_ECKD_CCW_PFX; | |
3502 | break; | |
8fd57520 JH |
3503 | case DASD_ECKD_CCW_READ_COUNT_MT: |
3504 | dedata->mask.perm = 0x1; | |
3505 | dedata->attributes.operation = DASD_BYPASS_CACHE; | |
3506 | dedata->ga_extended |= 0x42; | |
3507 | dedata->blk_size = blksize; | |
3508 | lredata->operation.orientation = 0x2; | |
3509 | lredata->operation.operation = 0x16; | |
3510 | lredata->auxiliary.check_bytes = 0x01; | |
3511 | pfx_cmd = DASD_ECKD_CCW_PFX_READ; | |
3512 | break; | |
f3eb5384 SW |
3513 | default: |
3514 | DBF_DEV_EVENT(DBF_ERR, basedev, | |
3515 | "prepare itcw, unknown opcode 0x%x", cmd); | |
3516 | BUG(); | |
3517 | break; | |
3518 | } | |
3519 | if (rc) | |
3520 | return rc; | |
3521 | ||
3522 | dedata->attributes.mode = 0x3; /* ECKD */ | |
3523 | ||
3524 | heads = basepriv->rdc_data.trk_per_cyl; | |
3525 | begcyl = trk / heads; | |
3526 | beghead = trk % heads; | |
3527 | endcyl = totrk / heads; | |
3528 | endhead = totrk % heads; | |
3529 | ||
3530 | /* check for sequential prestage - enhance cylinder range */ | |
3531 | if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || | |
3532 | dedata->attributes.operation == DASD_SEQ_ACCESS) { | |
3533 | ||
3534 | if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) | |
3535 | endcyl += basepriv->attrib.nr_cyl; | |
3536 | else | |
3537 | endcyl = (basepriv->real_cyl - 1); | |
3538 | } | |
3539 | ||
3540 | set_ch_t(&dedata->beg_ext, begcyl, beghead); | |
3541 | set_ch_t(&dedata->end_ext, endcyl, endhead); | |
3542 | ||
3543 | dedata->ep_format = 0x20; /* records per track is valid */ | |
3544 | dedata->ep_rec_per_track = blk_per_trk; | |
3545 | ||
3546 | if (rec_on_trk) { | |
3547 | switch (basepriv->rdc_data.dev_type) { | |
3548 | case 0x3390: | |
3549 | dn = ceil_quot(blksize + 6, 232); | |
3550 | d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); | |
3551 | sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; | |
3552 | break; | |
3553 | case 0x3380: | |
3554 | d = 7 + ceil_quot(blksize + 12, 32); | |
3555 | sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; | |
3556 | break; | |
3557 | } | |
3558 | } | |
3559 | ||
8fd57520 JH |
3560 | if (cmd == DASD_ECKD_CCW_READ_COUNT_MT) { |
3561 | lredata->auxiliary.length_valid = 0; | |
3562 | lredata->auxiliary.length_scope = 0; | |
3563 | lredata->sector = 0xff; | |
3564 | } else { | |
3565 | lredata->auxiliary.length_valid = 1; | |
3566 | lredata->auxiliary.length_scope = 1; | |
3567 | lredata->sector = sector; | |
3568 | } | |
f3eb5384 SW |
3569 | lredata->auxiliary.imbedded_ccw_valid = 1; |
3570 | lredata->length = tlf; | |
3571 | lredata->imbedded_ccw = cmd; | |
3572 | lredata->count = count; | |
f3eb5384 SW |
3573 | set_ch_t(&lredata->seek_addr, begcyl, beghead); |
3574 | lredata->search_arg.cyl = lredata->seek_addr.cyl; | |
3575 | lredata->search_arg.head = lredata->seek_addr.head; | |
3576 | lredata->search_arg.record = rec_on_trk; | |
3577 | ||
3578 | dcw = itcw_add_dcw(itcw, pfx_cmd, 0, | |
3579 | &pfxdata, sizeof(pfxdata), total_data_size); | |
82a7b955 | 3580 | return PTR_RET(dcw); |
f3eb5384 SW |
3581 | } |
3582 | ||
3583 | static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( | |
3584 | struct dasd_device *startdev, | |
3585 | struct dasd_block *block, | |
3586 | struct request *req, | |
3587 | sector_t first_rec, | |
3588 | sector_t last_rec, | |
3589 | sector_t first_trk, | |
3590 | sector_t last_trk, | |
3591 | unsigned int first_offs, | |
3592 | unsigned int last_offs, | |
3593 | unsigned int blk_per_trk, | |
3594 | unsigned int blksize) | |
3595 | { | |
f3eb5384 SW |
3596 | struct dasd_ccw_req *cqr; |
3597 | struct req_iterator iter; | |
7988613b | 3598 | struct bio_vec bv; |
f3eb5384 SW |
3599 | char *dst; |
3600 | unsigned int trkcount, ctidaw; | |
3601 | unsigned char cmd; | |
3602 | struct dasd_device *basedev; | |
3603 | unsigned int tlf; | |
3604 | struct itcw *itcw; | |
3605 | struct tidaw *last_tidaw = NULL; | |
3606 | int itcw_op; | |
3607 | size_t itcw_size; | |
ef19298b SW |
3608 | u8 tidaw_flags; |
3609 | unsigned int seg_len, part_len, len_to_track_end; | |
3610 | unsigned char new_track; | |
3611 | sector_t recid, trkid; | |
3612 | unsigned int offs; | |
3613 | unsigned int count, count_to_trk_end; | |
cd10502b | 3614 | int ret; |
f3eb5384 SW |
3615 | |
3616 | basedev = block->base; | |
f3eb5384 SW |
3617 | if (rq_data_dir(req) == READ) { |
3618 | cmd = DASD_ECKD_CCW_READ_TRACK_DATA; | |
3619 | itcw_op = ITCW_OP_READ; | |
3620 | } else if (rq_data_dir(req) == WRITE) { | |
3621 | cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; | |
3622 | itcw_op = ITCW_OP_WRITE; | |
3623 | } else | |
3624 | return ERR_PTR(-EINVAL); | |
3625 | ||
3626 | /* trackbased I/O needs address all memory via TIDAWs, | |
3627 | * not just for 64 bit addresses. This allows us to map | |
3628 | * each segment directly to one tidaw. | |
ef19298b SW |
3629 | * In the case of write requests, additional tidaws may |
3630 | * be needed when a segment crosses a track boundary. | |
f3eb5384 SW |
3631 | */ |
3632 | trkcount = last_trk - first_trk + 1; | |
3633 | ctidaw = 0; | |
3634 | rq_for_each_segment(bv, req, iter) { | |
3635 | ++ctidaw; | |
3636 | } | |
ef19298b SW |
3637 | if (rq_data_dir(req) == WRITE) |
3638 | ctidaw += (last_trk - first_trk); | |
f3eb5384 SW |
3639 | |
3640 | /* Allocate the ccw request. */ | |
3641 | itcw_size = itcw_calc_size(0, ctidaw, 0); | |
68b781fe | 3642 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); |
f3eb5384 SW |
3643 | if (IS_ERR(cqr)) |
3644 | return cqr; | |
3645 | ||
f3eb5384 SW |
3646 | /* transfer length factor: how many bytes to read from the last track */ |
3647 | if (first_trk == last_trk) | |
3648 | tlf = last_offs - first_offs + 1; | |
3649 | else | |
3650 | tlf = last_offs + 1; | |
3651 | tlf *= blksize; | |
3652 | ||
3653 | itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); | |
ef19298b | 3654 | if (IS_ERR(itcw)) { |
cd10502b JL |
3655 | ret = -EINVAL; |
3656 | goto out_error; | |
ef19298b | 3657 | } |
f3eb5384 | 3658 | cqr->cpaddr = itcw_get_tcw(itcw); |
f3eb5384 SW |
3659 | if (prepare_itcw(itcw, first_trk, last_trk, |
3660 | cmd, basedev, startdev, | |
3661 | first_offs + 1, | |
3662 | trkcount, blksize, | |
3663 | (last_rec - first_rec + 1) * blksize, | |
3664 | tlf, blk_per_trk) == -EAGAIN) { | |
3665 | /* Clock not in sync and XRC is enabled. | |
3666 | * Try again later. | |
3667 | */ | |
cd10502b JL |
3668 | ret = -EAGAIN; |
3669 | goto out_error; | |
f3eb5384 | 3670 | } |
d54cddb6 | 3671 | len_to_track_end = 0; |
f3eb5384 SW |
3672 | /* |
3673 | * A tidaw can address 4k of memory, but must not cross page boundaries | |
3674 | * We can let the block layer handle this by setting | |
3675 | * blk_queue_segment_boundary to page boundaries and | |
3676 | * blk_max_segment_size to page size when setting up the request queue. | |
ef19298b SW |
3677 | * For write requests, a TIDAW must not cross track boundaries, because |
3678 | * we have to set the CBC flag on the last tidaw for each track. | |
f3eb5384 | 3679 | */ |
ef19298b SW |
3680 | if (rq_data_dir(req) == WRITE) { |
3681 | new_track = 1; | |
3682 | recid = first_rec; | |
3683 | rq_for_each_segment(bv, req, iter) { | |
7988613b KO |
3684 | dst = page_address(bv.bv_page) + bv.bv_offset; |
3685 | seg_len = bv.bv_len; | |
ef19298b SW |
3686 | while (seg_len) { |
3687 | if (new_track) { | |
3688 | trkid = recid; | |
3689 | offs = sector_div(trkid, blk_per_trk); | |
3690 | count_to_trk_end = blk_per_trk - offs; | |
3691 | count = min((last_rec - recid + 1), | |
3692 | (sector_t)count_to_trk_end); | |
3693 | len_to_track_end = count * blksize; | |
3694 | recid += count; | |
3695 | new_track = 0; | |
3696 | } | |
3697 | part_len = min(seg_len, len_to_track_end); | |
3698 | seg_len -= part_len; | |
3699 | len_to_track_end -= part_len; | |
3700 | /* We need to end the tidaw at track end */ | |
3701 | if (!len_to_track_end) { | |
3702 | new_track = 1; | |
3703 | tidaw_flags = TIDAW_FLAGS_INSERT_CBC; | |
3704 | } else | |
3705 | tidaw_flags = 0; | |
3706 | last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, | |
3707 | dst, part_len); | |
cd10502b JL |
3708 | if (IS_ERR(last_tidaw)) { |
3709 | ret = -EINVAL; | |
3710 | goto out_error; | |
3711 | } | |
ef19298b SW |
3712 | dst += part_len; |
3713 | } | |
3714 | } | |
3715 | } else { | |
3716 | rq_for_each_segment(bv, req, iter) { | |
7988613b | 3717 | dst = page_address(bv.bv_page) + bv.bv_offset; |
ef19298b | 3718 | last_tidaw = itcw_add_tidaw(itcw, 0x00, |
7988613b | 3719 | dst, bv.bv_len); |
cd10502b JL |
3720 | if (IS_ERR(last_tidaw)) { |
3721 | ret = -EINVAL; | |
3722 | goto out_error; | |
3723 | } | |
ef19298b | 3724 | } |
f3eb5384 | 3725 | } |
ef19298b SW |
3726 | last_tidaw->flags |= TIDAW_FLAGS_LAST; |
3727 | last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; | |
f3eb5384 SW |
3728 | itcw_finalize(itcw); |
3729 | ||
3730 | if (blk_noretry_request(req) || | |
3731 | block->base->features & DASD_FEATURE_FAILFAST) | |
3732 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); | |
ef19298b | 3733 | cqr->cpmode = 1; |
f3eb5384 SW |
3734 | cqr->startdev = startdev; |
3735 | cqr->memdev = startdev; | |
3736 | cqr->block = block; | |
7c8faa86 | 3737 | cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ |
a4d26c6a | 3738 | cqr->lpm = startdev->path_data.ppm; |
1f1ee9ad | 3739 | cqr->retries = startdev->default_retries; |
1aae0560 | 3740 | cqr->buildclk = get_tod_clock(); |
f3eb5384 SW |
3741 | cqr->status = DASD_CQR_FILLED; |
3742 | return cqr; | |
cd10502b JL |
3743 | out_error: |
3744 | dasd_sfree_request(cqr, startdev); | |
3745 | return ERR_PTR(ret); | |
f3eb5384 SW |
3746 | } |
3747 | ||
3748 | static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, | |
3749 | struct dasd_block *block, | |
3750 | struct request *req) | |
3751 | { | |
ef19298b | 3752 | int cmdrtd, cmdwtd; |
f3eb5384 | 3753 | int use_prefix; |
ef19298b | 3754 | int fcx_multitrack; |
45b44d76 | 3755 | struct dasd_eckd_private *private; |
f3eb5384 SW |
3756 | struct dasd_device *basedev; |
3757 | sector_t first_rec, last_rec; | |
3758 | sector_t first_trk, last_trk; | |
3759 | unsigned int first_offs, last_offs; | |
3760 | unsigned int blk_per_trk, blksize; | |
3761 | int cdlspecial; | |
ef19298b | 3762 | unsigned int data_size; |
f3eb5384 SW |
3763 | struct dasd_ccw_req *cqr; |
3764 | ||
3765 | basedev = block->base; | |
543691a4 | 3766 | private = basedev->private; |
f3eb5384 SW |
3767 | |
3768 | /* Calculate number of blocks/records per track. */ | |
3769 | blksize = block->bp_block; | |
3770 | blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); | |
6fca97a9 SH |
3771 | if (blk_per_trk == 0) |
3772 | return ERR_PTR(-EINVAL); | |
f3eb5384 | 3773 | /* Calculate record id of first and last block. */ |
83096ebf | 3774 | first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; |
f3eb5384 SW |
3775 | first_offs = sector_div(first_trk, blk_per_trk); |
3776 | last_rec = last_trk = | |
83096ebf | 3777 | (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; |
f3eb5384 SW |
3778 | last_offs = sector_div(last_trk, blk_per_trk); |
3779 | cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); | |
3780 | ||
ef19298b SW |
3781 | fcx_multitrack = private->features.feature[40] & 0x20; |
3782 | data_size = blk_rq_bytes(req); | |
26a35f37 SW |
3783 | if (data_size % blksize) |
3784 | return ERR_PTR(-EINVAL); | |
ef19298b SW |
3785 | /* tpm write request add CBC data on each track boundary */ |
3786 | if (rq_data_dir(req) == WRITE) | |
3787 | data_size += (last_trk - first_trk) * 4; | |
f3eb5384 SW |
3788 | |
3789 | /* is read track data and write track data in command mode supported? */ | |
3790 | cmdrtd = private->features.feature[9] & 0x20; | |
3791 | cmdwtd = private->features.feature[12] & 0x40; | |
3792 | use_prefix = private->features.feature[8] & 0x01; | |
3793 | ||
3794 | cqr = NULL; | |
3795 | if (cdlspecial || dasd_page_cache) { | |
3796 | /* do nothing, just fall through to the cmd mode single case */ | |
ef19298b SW |
3797 | } else if ((data_size <= private->fcx_max_data) |
3798 | && (fcx_multitrack || (first_trk == last_trk))) { | |
f3eb5384 SW |
3799 | cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, |
3800 | first_rec, last_rec, | |
3801 | first_trk, last_trk, | |
3802 | first_offs, last_offs, | |
3803 | blk_per_trk, blksize); | |
ef19298b SW |
3804 | if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && |
3805 | (PTR_ERR(cqr) != -ENOMEM)) | |
f3eb5384 SW |
3806 | cqr = NULL; |
3807 | } else if (use_prefix && | |
3808 | (((rq_data_dir(req) == READ) && cmdrtd) || | |
3809 | ((rq_data_dir(req) == WRITE) && cmdwtd))) { | |
3810 | cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, | |
3811 | first_rec, last_rec, | |
3812 | first_trk, last_trk, | |
3813 | first_offs, last_offs, | |
3814 | blk_per_trk, blksize); | |
ef19298b SW |
3815 | if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && |
3816 | (PTR_ERR(cqr) != -ENOMEM)) | |
f3eb5384 SW |
3817 | cqr = NULL; |
3818 | } | |
3819 | if (!cqr) | |
3820 | cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, | |
3821 | first_rec, last_rec, | |
3822 | first_trk, last_trk, | |
3823 | first_offs, last_offs, | |
3824 | blk_per_trk, blksize); | |
3825 | return cqr; | |
3826 | } | |
3827 | ||
e4dbb0f2 SH |
3828 | static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev, |
3829 | struct dasd_block *block, | |
3830 | struct request *req) | |
3831 | { | |
e4dbb0f2 SH |
3832 | unsigned long *idaws; |
3833 | struct dasd_device *basedev; | |
3834 | struct dasd_ccw_req *cqr; | |
3835 | struct ccw1 *ccw; | |
3836 | struct req_iterator iter; | |
7988613b | 3837 | struct bio_vec bv; |
e4dbb0f2 SH |
3838 | char *dst; |
3839 | unsigned char cmd; | |
3840 | unsigned int trkcount; | |
3841 | unsigned int seg_len, len_to_track_end; | |
3842 | unsigned int first_offs; | |
3843 | unsigned int cidaw, cplength, datasize; | |
558b9ef0 SW |
3844 | sector_t first_trk, last_trk, sectors; |
3845 | sector_t start_padding_sectors, end_sector_offset, end_padding_sectors; | |
e4dbb0f2 SH |
3846 | unsigned int pfx_datasize; |
3847 | ||
3848 | /* | |
3849 | * raw track access needs to be mutiple of 64k and on 64k boundary | |
558b9ef0 SW |
3850 | * For read requests we can fix an incorrect alignment by padding |
3851 | * the request with dummy pages. | |
e4dbb0f2 | 3852 | */ |
558b9ef0 SW |
3853 | start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK; |
3854 | end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) % | |
3855 | DASD_RAW_SECTORS_PER_TRACK; | |
3856 | end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) % | |
3857 | DASD_RAW_SECTORS_PER_TRACK; | |
3858 | basedev = block->base; | |
3859 | if ((start_padding_sectors || end_padding_sectors) && | |
3860 | (rq_data_dir(req) == WRITE)) { | |
3861 | DBF_DEV_EVENT(DBF_ERR, basedev, | |
3862 | "raw write not track aligned (%lu,%lu) req %p", | |
3863 | start_padding_sectors, end_padding_sectors, req); | |
e4dbb0f2 SH |
3864 | cqr = ERR_PTR(-EINVAL); |
3865 | goto out; | |
3866 | } | |
3867 | ||
3868 | first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; | |
3869 | last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / | |
3870 | DASD_RAW_SECTORS_PER_TRACK; | |
3871 | trkcount = last_trk - first_trk + 1; | |
3872 | first_offs = 0; | |
e4dbb0f2 SH |
3873 | |
3874 | if (rq_data_dir(req) == READ) | |
3875 | cmd = DASD_ECKD_CCW_READ_TRACK; | |
3876 | else if (rq_data_dir(req) == WRITE) | |
3877 | cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; | |
3878 | else { | |
3879 | cqr = ERR_PTR(-EINVAL); | |
3880 | goto out; | |
3881 | } | |
3882 | ||
3883 | /* | |
3884 | * Raw track based I/O needs IDAWs for each page, | |
3885 | * and not just for 64 bit addresses. | |
3886 | */ | |
3887 | cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; | |
3888 | ||
3889 | /* 1x prefix + one read/write ccw per track */ | |
3890 | cplength = 1 + trkcount; | |
3891 | ||
3892 | /* | |
3893 | * struct PFX_eckd_data has up to 2 byte as extended parameter | |
3894 | * this is needed for write full track and has to be mentioned | |
25985edc | 3895 | * separately |
e4dbb0f2 SH |
3896 | * add 8 instead of 2 to keep 8 byte boundary |
3897 | */ | |
3898 | pfx_datasize = sizeof(struct PFX_eckd_data) + 8; | |
3899 | ||
3900 | datasize = pfx_datasize + cidaw * sizeof(unsigned long long); | |
3901 | ||
3902 | /* Allocate the ccw request. */ | |
3903 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, | |
3904 | datasize, startdev); | |
3905 | if (IS_ERR(cqr)) | |
3906 | goto out; | |
3907 | ccw = cqr->cpaddr; | |
3908 | ||
3909 | if (prefix_LRE(ccw++, cqr->data, first_trk, last_trk, cmd, | |
3910 | basedev, startdev, 1 /* format */, first_offs + 1, | |
3911 | trkcount, 0, 0) == -EAGAIN) { | |
3912 | /* Clock not in sync and XRC is enabled. | |
3913 | * Try again later. | |
3914 | */ | |
3915 | dasd_sfree_request(cqr, startdev); | |
3916 | cqr = ERR_PTR(-EAGAIN); | |
3917 | goto out; | |
3918 | } | |
3919 | ||
3920 | idaws = (unsigned long *)(cqr->data + pfx_datasize); | |
e4dbb0f2 | 3921 | len_to_track_end = 0; |
558b9ef0 SW |
3922 | if (start_padding_sectors) { |
3923 | ccw[-1].flags |= CCW_FLAG_CC; | |
3924 | ccw->cmd_code = cmd; | |
3925 | /* maximum 3390 track size */ | |
3926 | ccw->count = 57326; | |
3927 | /* 64k map to one track */ | |
3928 | len_to_track_end = 65536 - start_padding_sectors * 512; | |
3929 | ccw->cda = (__u32)(addr_t)idaws; | |
3930 | ccw->flags |= CCW_FLAG_IDA; | |
3931 | ccw->flags |= CCW_FLAG_SLI; | |
3932 | ccw++; | |
3933 | for (sectors = 0; sectors < start_padding_sectors; sectors += 8) | |
3934 | idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); | |
3935 | } | |
e4dbb0f2 | 3936 | rq_for_each_segment(bv, req, iter) { |
7988613b KO |
3937 | dst = page_address(bv.bv_page) + bv.bv_offset; |
3938 | seg_len = bv.bv_len; | |
558b9ef0 SW |
3939 | if (cmd == DASD_ECKD_CCW_READ_TRACK) |
3940 | memset(dst, 0, seg_len); | |
e4dbb0f2 SH |
3941 | if (!len_to_track_end) { |
3942 | ccw[-1].flags |= CCW_FLAG_CC; | |
3943 | ccw->cmd_code = cmd; | |
3944 | /* maximum 3390 track size */ | |
3945 | ccw->count = 57326; | |
3946 | /* 64k map to one track */ | |
3947 | len_to_track_end = 65536; | |
3948 | ccw->cda = (__u32)(addr_t)idaws; | |
3949 | ccw->flags |= CCW_FLAG_IDA; | |
3950 | ccw->flags |= CCW_FLAG_SLI; | |
3951 | ccw++; | |
3952 | } | |
3953 | len_to_track_end -= seg_len; | |
3954 | idaws = idal_create_words(idaws, dst, seg_len); | |
3955 | } | |
558b9ef0 SW |
3956 | for (sectors = 0; sectors < end_padding_sectors; sectors += 8) |
3957 | idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); | |
e4dbb0f2 SH |
3958 | if (blk_noretry_request(req) || |
3959 | block->base->features & DASD_FEATURE_FAILFAST) | |
3960 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); | |
3961 | cqr->startdev = startdev; | |
3962 | cqr->memdev = startdev; | |
3963 | cqr->block = block; | |
3964 | cqr->expires = startdev->default_expires * HZ; | |
3965 | cqr->lpm = startdev->path_data.ppm; | |
1f1ee9ad | 3966 | cqr->retries = startdev->default_retries; |
1aae0560 | 3967 | cqr->buildclk = get_tod_clock(); |
e4dbb0f2 SH |
3968 | cqr->status = DASD_CQR_FILLED; |
3969 | ||
3970 | if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN) | |
3971 | cqr = NULL; | |
3972 | out: | |
3973 | return cqr; | |
3974 | } | |
3975 | ||
3976 | ||
1da177e4 LT |
3977 | static int |
3978 | dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) | |
3979 | { | |
3980 | struct dasd_eckd_private *private; | |
3981 | struct ccw1 *ccw; | |
5705f702 | 3982 | struct req_iterator iter; |
7988613b | 3983 | struct bio_vec bv; |
1da177e4 LT |
3984 | char *dst, *cda; |
3985 | unsigned int blksize, blk_per_trk, off; | |
3986 | sector_t recid; | |
5705f702 | 3987 | int status; |
1da177e4 LT |
3988 | |
3989 | if (!dasd_page_cache) | |
3990 | goto out; | |
543691a4 | 3991 | private = cqr->block->base->private; |
8e09f215 | 3992 | blksize = cqr->block->bp_block; |
1da177e4 | 3993 | blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); |
83096ebf | 3994 | recid = blk_rq_pos(req) >> cqr->block->s2b_shift; |
1da177e4 LT |
3995 | ccw = cqr->cpaddr; |
3996 | /* Skip over define extent & locate record. */ | |
3997 | ccw++; | |
3998 | if (private->uses_cdl == 0 || recid > 2*blk_per_trk) | |
3999 | ccw++; | |
5705f702 | 4000 | rq_for_each_segment(bv, req, iter) { |
7988613b KO |
4001 | dst = page_address(bv.bv_page) + bv.bv_offset; |
4002 | for (off = 0; off < bv.bv_len; off += blksize) { | |
1da177e4 LT |
4003 | /* Skip locate record. */ |
4004 | if (private->uses_cdl && recid <= 2*blk_per_trk) | |
4005 | ccw++; | |
4006 | if (dst) { | |
4007 | if (ccw->flags & CCW_FLAG_IDA) | |
4008 | cda = *((char **)((addr_t) ccw->cda)); | |
4009 | else | |
4010 | cda = (char *)((addr_t) ccw->cda); | |
4011 | if (dst != cda) { | |
4012 | if (rq_data_dir(req) == READ) | |
7988613b | 4013 | memcpy(dst, cda, bv.bv_len); |
1da177e4 LT |
4014 | kmem_cache_free(dasd_page_cache, |
4015 | (void *)((addr_t)cda & PAGE_MASK)); | |
4016 | } | |
4017 | dst = NULL; | |
4018 | } | |
4019 | ccw++; | |
4020 | recid++; | |
4021 | } | |
4022 | } | |
4023 | out: | |
4024 | status = cqr->status == DASD_CQR_DONE; | |
8e09f215 | 4025 | dasd_sfree_request(cqr, cqr->memdev); |
1da177e4 LT |
4026 | return status; |
4027 | } | |
4028 | ||
8e09f215 | 4029 | /* |
f3eb5384 | 4030 | * Modify ccw/tcw in cqr so it can be started on a base device. |
8e09f215 SW |
4031 | * |
4032 | * Note that this is not enough to restart the cqr! | |
4033 | * Either reset cqr->startdev as well (summary unit check handling) | |
4034 | * or restart via separate cqr (as in ERP handling). | |
4035 | */ | |
4036 | void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) | |
4037 | { | |
4038 | struct ccw1 *ccw; | |
4039 | struct PFX_eckd_data *pfxdata; | |
f3eb5384 SW |
4040 | struct tcw *tcw; |
4041 | struct tccb *tccb; | |
4042 | struct dcw *dcw; | |
4043 | ||
4044 | if (cqr->cpmode == 1) { | |
4045 | tcw = cqr->cpaddr; | |
4046 | tccb = tcw_get_tccb(tcw); | |
4047 | dcw = (struct dcw *)&tccb->tca[0]; | |
4048 | pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; | |
8e09f215 SW |
4049 | pfxdata->validity.verify_base = 0; |
4050 | pfxdata->validity.hyper_pav = 0; | |
f3eb5384 SW |
4051 | } else { |
4052 | ccw = cqr->cpaddr; | |
4053 | pfxdata = cqr->data; | |
4054 | if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { | |
4055 | pfxdata->validity.verify_base = 0; | |
4056 | pfxdata->validity.hyper_pav = 0; | |
4057 | } | |
8e09f215 SW |
4058 | } |
4059 | } | |
4060 | ||
4061 | #define DASD_ECKD_CHANQ_MAX_SIZE 4 | |
4062 | ||
4063 | static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, | |
4064 | struct dasd_block *block, | |
4065 | struct request *req) | |
4066 | { | |
4067 | struct dasd_eckd_private *private; | |
4068 | struct dasd_device *startdev; | |
4069 | unsigned long flags; | |
4070 | struct dasd_ccw_req *cqr; | |
4071 | ||
4072 | startdev = dasd_alias_get_start_dev(base); | |
4073 | if (!startdev) | |
4074 | startdev = base; | |
543691a4 | 4075 | private = startdev->private; |
8e09f215 SW |
4076 | if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) |
4077 | return ERR_PTR(-EBUSY); | |
4078 | ||
4079 | spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); | |
4080 | private->count++; | |
e4dbb0f2 SH |
4081 | if ((base->features & DASD_FEATURE_USERAW)) |
4082 | cqr = dasd_raw_build_cp(startdev, block, req); | |
4083 | else | |
4084 | cqr = dasd_eckd_build_cp(startdev, block, req); | |
8e09f215 SW |
4085 | if (IS_ERR(cqr)) |
4086 | private->count--; | |
4087 | spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); | |
4088 | return cqr; | |
4089 | } | |
4090 | ||
4091 | static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, | |
4092 | struct request *req) | |
4093 | { | |
4094 | struct dasd_eckd_private *private; | |
4095 | unsigned long flags; | |
4096 | ||
4097 | spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); | |
543691a4 | 4098 | private = cqr->memdev->private; |
8e09f215 SW |
4099 | private->count--; |
4100 | spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); | |
4101 | return dasd_eckd_free_cp(cqr, req); | |
4102 | } | |
4103 | ||
1da177e4 LT |
4104 | static int |
4105 | dasd_eckd_fill_info(struct dasd_device * device, | |
4106 | struct dasd_information2_t * info) | |
4107 | { | |
543691a4 | 4108 | struct dasd_eckd_private *private = device->private; |
1da177e4 | 4109 | |
1da177e4 LT |
4110 | info->label_block = 2; |
4111 | info->FBA_layout = private->uses_cdl ? 0 : 1; | |
4112 | info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; | |
543691a4 | 4113 | info->characteristics_size = sizeof(private->rdc_data); |
1da177e4 | 4114 | memcpy(info->characteristics, &private->rdc_data, |
543691a4 | 4115 | sizeof(private->rdc_data)); |
4abb08c2 SW |
4116 | info->confdata_size = min((unsigned long)private->conf_len, |
4117 | sizeof(info->configuration_data)); | |
4118 | memcpy(info->configuration_data, private->conf_data, | |
4119 | info->confdata_size); | |
1da177e4 LT |
4120 | return 0; |
4121 | } | |
4122 | ||
4123 | /* | |
4124 | * SECTION: ioctl functions for eckd devices. | |
4125 | */ | |
4126 | ||
4127 | /* | |
4128 | * Release device ioctl. | |
138c014d | 4129 | * Buils a channel programm to releases a prior reserved |
1da177e4 LT |
4130 | * (see dasd_eckd_reserve) device. |
4131 | */ | |
4132 | static int | |
1107ccfb | 4133 | dasd_eckd_release(struct dasd_device *device) |
1da177e4 | 4134 | { |
1da177e4 LT |
4135 | struct dasd_ccw_req *cqr; |
4136 | int rc; | |
f3eb5384 | 4137 | struct ccw1 *ccw; |
f932bcea | 4138 | int useglobal; |
1da177e4 LT |
4139 | |
4140 | if (!capable(CAP_SYS_ADMIN)) | |
4141 | return -EACCES; | |
4142 | ||
f932bcea | 4143 | useglobal = 0; |
68b781fe | 4144 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); |
1da177e4 | 4145 | if (IS_ERR(cqr)) { |
f932bcea SW |
4146 | mutex_lock(&dasd_reserve_mutex); |
4147 | useglobal = 1; | |
4148 | cqr = &dasd_reserve_req->cqr; | |
4149 | memset(cqr, 0, sizeof(*cqr)); | |
4150 | memset(&dasd_reserve_req->ccw, 0, | |
4151 | sizeof(dasd_reserve_req->ccw)); | |
4152 | cqr->cpaddr = &dasd_reserve_req->ccw; | |
4153 | cqr->data = &dasd_reserve_req->data; | |
4154 | cqr->magic = DASD_ECKD_MAGIC; | |
1da177e4 | 4155 | } |
f3eb5384 SW |
4156 | ccw = cqr->cpaddr; |
4157 | ccw->cmd_code = DASD_ECKD_CCW_RELEASE; | |
4158 | ccw->flags |= CCW_FLAG_SLI; | |
4159 | ccw->count = 32; | |
4160 | ccw->cda = (__u32)(addr_t) cqr->data; | |
8e09f215 SW |
4161 | cqr->startdev = device; |
4162 | cqr->memdev = device; | |
1da177e4 | 4163 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
1c01b8a5 | 4164 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
336c340b | 4165 | cqr->retries = 2; /* set retry counter to enable basic ERP */ |
1da177e4 | 4166 | cqr->expires = 2 * HZ; |
1aae0560 | 4167 | cqr->buildclk = get_tod_clock(); |
1da177e4 LT |
4168 | cqr->status = DASD_CQR_FILLED; |
4169 | ||
4170 | rc = dasd_sleep_on_immediatly(cqr); | |
5a27e60d SW |
4171 | if (!rc) |
4172 | clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); | |
1da177e4 | 4173 | |
f932bcea SW |
4174 | if (useglobal) |
4175 | mutex_unlock(&dasd_reserve_mutex); | |
4176 | else | |
4177 | dasd_sfree_request(cqr, cqr->memdev); | |
1da177e4 LT |
4178 | return rc; |
4179 | } | |
4180 | ||
4181 | /* | |
4182 | * Reserve device ioctl. | |
4183 | * Options are set to 'synchronous wait for interrupt' and | |
138c014d HH |
4184 | * 'timeout the request'. This leads to a terminate IO if |
4185 | * the interrupt is outstanding for a certain time. | |
1da177e4 LT |
4186 | */ |
4187 | static int | |
1107ccfb | 4188 | dasd_eckd_reserve(struct dasd_device *device) |
1da177e4 | 4189 | { |
1da177e4 LT |
4190 | struct dasd_ccw_req *cqr; |
4191 | int rc; | |
f3eb5384 | 4192 | struct ccw1 *ccw; |
f932bcea | 4193 | int useglobal; |
1da177e4 LT |
4194 | |
4195 | if (!capable(CAP_SYS_ADMIN)) | |
4196 | return -EACCES; | |
4197 | ||
f932bcea | 4198 | useglobal = 0; |
68b781fe | 4199 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); |
1da177e4 | 4200 | if (IS_ERR(cqr)) { |
f932bcea SW |
4201 | mutex_lock(&dasd_reserve_mutex); |
4202 | useglobal = 1; | |
4203 | cqr = &dasd_reserve_req->cqr; | |
4204 | memset(cqr, 0, sizeof(*cqr)); | |
4205 | memset(&dasd_reserve_req->ccw, 0, | |
4206 | sizeof(dasd_reserve_req->ccw)); | |
4207 | cqr->cpaddr = &dasd_reserve_req->ccw; | |
4208 | cqr->data = &dasd_reserve_req->data; | |
4209 | cqr->magic = DASD_ECKD_MAGIC; | |
1da177e4 | 4210 | } |
f3eb5384 SW |
4211 | ccw = cqr->cpaddr; |
4212 | ccw->cmd_code = DASD_ECKD_CCW_RESERVE; | |
4213 | ccw->flags |= CCW_FLAG_SLI; | |
4214 | ccw->count = 32; | |
4215 | ccw->cda = (__u32)(addr_t) cqr->data; | |
8e09f215 SW |
4216 | cqr->startdev = device; |
4217 | cqr->memdev = device; | |
1da177e4 | 4218 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
1c01b8a5 | 4219 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
336c340b | 4220 | cqr->retries = 2; /* set retry counter to enable basic ERP */ |
1da177e4 | 4221 | cqr->expires = 2 * HZ; |
1aae0560 | 4222 | cqr->buildclk = get_tod_clock(); |
1da177e4 LT |
4223 | cqr->status = DASD_CQR_FILLED; |
4224 | ||
4225 | rc = dasd_sleep_on_immediatly(cqr); | |
5a27e60d SW |
4226 | if (!rc) |
4227 | set_bit(DASD_FLAG_IS_RESERVED, &device->flags); | |
1da177e4 | 4228 | |
f932bcea SW |
4229 | if (useglobal) |
4230 | mutex_unlock(&dasd_reserve_mutex); | |
4231 | else | |
4232 | dasd_sfree_request(cqr, cqr->memdev); | |
1da177e4 LT |
4233 | return rc; |
4234 | } | |
4235 | ||
4236 | /* | |
4237 | * Steal lock ioctl - unconditional reserve device. | |
138c014d | 4238 | * Buils a channel programm to break a device's reservation. |
1da177e4 LT |
4239 | * (unconditional reserve) |
4240 | */ | |
4241 | static int | |
1107ccfb | 4242 | dasd_eckd_steal_lock(struct dasd_device *device) |
1da177e4 | 4243 | { |
1da177e4 LT |
4244 | struct dasd_ccw_req *cqr; |
4245 | int rc; | |
f3eb5384 | 4246 | struct ccw1 *ccw; |
f932bcea | 4247 | int useglobal; |
1da177e4 LT |
4248 | |
4249 | if (!capable(CAP_SYS_ADMIN)) | |
4250 | return -EACCES; | |
4251 | ||
f932bcea | 4252 | useglobal = 0; |
68b781fe | 4253 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); |
1da177e4 | 4254 | if (IS_ERR(cqr)) { |
f932bcea SW |
4255 | mutex_lock(&dasd_reserve_mutex); |
4256 | useglobal = 1; | |
4257 | cqr = &dasd_reserve_req->cqr; | |
4258 | memset(cqr, 0, sizeof(*cqr)); | |
4259 | memset(&dasd_reserve_req->ccw, 0, | |
4260 | sizeof(dasd_reserve_req->ccw)); | |
4261 | cqr->cpaddr = &dasd_reserve_req->ccw; | |
4262 | cqr->data = &dasd_reserve_req->data; | |
4263 | cqr->magic = DASD_ECKD_MAGIC; | |
1da177e4 | 4264 | } |
f3eb5384 SW |
4265 | ccw = cqr->cpaddr; |
4266 | ccw->cmd_code = DASD_ECKD_CCW_SLCK; | |
4267 | ccw->flags |= CCW_FLAG_SLI; | |
4268 | ccw->count = 32; | |
4269 | ccw->cda = (__u32)(addr_t) cqr->data; | |
8e09f215 SW |
4270 | cqr->startdev = device; |
4271 | cqr->memdev = device; | |
1da177e4 | 4272 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
1c01b8a5 | 4273 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
336c340b | 4274 | cqr->retries = 2; /* set retry counter to enable basic ERP */ |
1da177e4 | 4275 | cqr->expires = 2 * HZ; |
1aae0560 | 4276 | cqr->buildclk = get_tod_clock(); |
1da177e4 LT |
4277 | cqr->status = DASD_CQR_FILLED; |
4278 | ||
4279 | rc = dasd_sleep_on_immediatly(cqr); | |
5a27e60d SW |
4280 | if (!rc) |
4281 | set_bit(DASD_FLAG_IS_RESERVED, &device->flags); | |
1da177e4 | 4282 | |
f932bcea SW |
4283 | if (useglobal) |
4284 | mutex_unlock(&dasd_reserve_mutex); | |
4285 | else | |
4286 | dasd_sfree_request(cqr, cqr->memdev); | |
1da177e4 LT |
4287 | return rc; |
4288 | } | |
4289 | ||
196339f1 SW |
4290 | /* |
4291 | * SNID - Sense Path Group ID | |
4292 | * This ioctl may be used in situations where I/O is stalled due to | |
4293 | * a reserve, so if the normal dasd_smalloc_request fails, we use the | |
4294 | * preallocated dasd_reserve_req. | |
4295 | */ | |
4296 | static int dasd_eckd_snid(struct dasd_device *device, | |
4297 | void __user *argp) | |
4298 | { | |
4299 | struct dasd_ccw_req *cqr; | |
4300 | int rc; | |
4301 | struct ccw1 *ccw; | |
4302 | int useglobal; | |
4303 | struct dasd_snid_ioctl_data usrparm; | |
4304 | ||
4305 | if (!capable(CAP_SYS_ADMIN)) | |
4306 | return -EACCES; | |
4307 | ||
4308 | if (copy_from_user(&usrparm, argp, sizeof(usrparm))) | |
4309 | return -EFAULT; | |
4310 | ||
4311 | useglobal = 0; | |
4312 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, | |
4313 | sizeof(struct dasd_snid_data), device); | |
4314 | if (IS_ERR(cqr)) { | |
4315 | mutex_lock(&dasd_reserve_mutex); | |
4316 | useglobal = 1; | |
4317 | cqr = &dasd_reserve_req->cqr; | |
4318 | memset(cqr, 0, sizeof(*cqr)); | |
4319 | memset(&dasd_reserve_req->ccw, 0, | |
4320 | sizeof(dasd_reserve_req->ccw)); | |
4321 | cqr->cpaddr = &dasd_reserve_req->ccw; | |
4322 | cqr->data = &dasd_reserve_req->data; | |
4323 | cqr->magic = DASD_ECKD_MAGIC; | |
4324 | } | |
4325 | ccw = cqr->cpaddr; | |
4326 | ccw->cmd_code = DASD_ECKD_CCW_SNID; | |
4327 | ccw->flags |= CCW_FLAG_SLI; | |
4328 | ccw->count = 12; | |
4329 | ccw->cda = (__u32)(addr_t) cqr->data; | |
4330 | cqr->startdev = device; | |
4331 | cqr->memdev = device; | |
4332 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); | |
4333 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); | |
5a27e60d | 4334 | set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); |
196339f1 SW |
4335 | cqr->retries = 5; |
4336 | cqr->expires = 10 * HZ; | |
1aae0560 | 4337 | cqr->buildclk = get_tod_clock(); |
196339f1 SW |
4338 | cqr->status = DASD_CQR_FILLED; |
4339 | cqr->lpm = usrparm.path_mask; | |
4340 | ||
4341 | rc = dasd_sleep_on_immediatly(cqr); | |
4342 | /* verify that I/O processing didn't modify the path mask */ | |
4343 | if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) | |
4344 | rc = -EIO; | |
4345 | if (!rc) { | |
4346 | usrparm.data = *((struct dasd_snid_data *)cqr->data); | |
4347 | if (copy_to_user(argp, &usrparm, sizeof(usrparm))) | |
4348 | rc = -EFAULT; | |
4349 | } | |
4350 | ||
4351 | if (useglobal) | |
4352 | mutex_unlock(&dasd_reserve_mutex); | |
4353 | else | |
4354 | dasd_sfree_request(cqr, cqr->memdev); | |
4355 | return rc; | |
4356 | } | |
4357 | ||
1da177e4 LT |
4358 | /* |
4359 | * Read performance statistics | |
4360 | */ | |
4361 | static int | |
1107ccfb | 4362 | dasd_eckd_performance(struct dasd_device *device, void __user *argp) |
1da177e4 | 4363 | { |
1da177e4 LT |
4364 | struct dasd_psf_prssd_data *prssdp; |
4365 | struct dasd_rssd_perf_stats_t *stats; | |
4366 | struct dasd_ccw_req *cqr; | |
4367 | struct ccw1 *ccw; | |
4368 | int rc; | |
4369 | ||
68b781fe | 4370 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, |
8e09f215 SW |
4371 | (sizeof(struct dasd_psf_prssd_data) + |
4372 | sizeof(struct dasd_rssd_perf_stats_t)), | |
1da177e4 LT |
4373 | device); |
4374 | if (IS_ERR(cqr)) { | |
fc19f381 | 4375 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
1da177e4 LT |
4376 | "Could not allocate initialization request"); |
4377 | return PTR_ERR(cqr); | |
4378 | } | |
8e09f215 SW |
4379 | cqr->startdev = device; |
4380 | cqr->memdev = device; | |
1da177e4 | 4381 | cqr->retries = 0; |
eb6e199b | 4382 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
1da177e4 LT |
4383 | cqr->expires = 10 * HZ; |
4384 | ||
4385 | /* Prepare for Read Subsystem Data */ | |
4386 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
8e09f215 | 4387 | memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); |
1da177e4 | 4388 | prssdp->order = PSF_ORDER_PRSSD; |
5d67d164 | 4389 | prssdp->suborder = 0x01; /* Performance Statistics */ |
1da177e4 LT |
4390 | prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ |
4391 | ||
4392 | ccw = cqr->cpaddr; | |
4393 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
8e09f215 | 4394 | ccw->count = sizeof(struct dasd_psf_prssd_data); |
1da177e4 LT |
4395 | ccw->flags |= CCW_FLAG_CC; |
4396 | ccw->cda = (__u32)(addr_t) prssdp; | |
4397 | ||
4398 | /* Read Subsystem Data - Performance Statistics */ | |
4399 | stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); | |
8e09f215 | 4400 | memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); |
1da177e4 LT |
4401 | |
4402 | ccw++; | |
4403 | ccw->cmd_code = DASD_ECKD_CCW_RSSD; | |
8e09f215 | 4404 | ccw->count = sizeof(struct dasd_rssd_perf_stats_t); |
1da177e4 LT |
4405 | ccw->cda = (__u32)(addr_t) stats; |
4406 | ||
1aae0560 | 4407 | cqr->buildclk = get_tod_clock(); |
1da177e4 LT |
4408 | cqr->status = DASD_CQR_FILLED; |
4409 | rc = dasd_sleep_on(cqr); | |
4410 | if (rc == 0) { | |
1da177e4 LT |
4411 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; |
4412 | stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); | |
1107ccfb CH |
4413 | if (copy_to_user(argp, stats, |
4414 | sizeof(struct dasd_rssd_perf_stats_t))) | |
4415 | rc = -EFAULT; | |
1da177e4 | 4416 | } |
8e09f215 | 4417 | dasd_sfree_request(cqr, cqr->memdev); |
1da177e4 LT |
4418 | return rc; |
4419 | } | |
4420 | ||
4421 | /* | |
4422 | * Get attributes (cache operations) | |
4423 | * Returnes the cache attributes used in Define Extend (DE). | |
4424 | */ | |
4425 | static int | |
1107ccfb | 4426 | dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) |
1da177e4 | 4427 | { |
543691a4 | 4428 | struct dasd_eckd_private *private = device->private; |
1107ccfb | 4429 | struct attrib_data_t attrib = private->attrib; |
1da177e4 LT |
4430 | int rc; |
4431 | ||
4432 | if (!capable(CAP_SYS_ADMIN)) | |
4433 | return -EACCES; | |
1107ccfb | 4434 | if (!argp) |
1da177e4 LT |
4435 | return -EINVAL; |
4436 | ||
1107ccfb CH |
4437 | rc = 0; |
4438 | if (copy_to_user(argp, (long *) &attrib, | |
8e09f215 | 4439 | sizeof(struct attrib_data_t))) |
1107ccfb | 4440 | rc = -EFAULT; |
1da177e4 LT |
4441 | |
4442 | return rc; | |
4443 | } | |
4444 | ||
4445 | /* | |
4446 | * Set attributes (cache operations) | |
4447 | * Stores the attributes for cache operation to be used in Define Extend (DE). | |
4448 | */ | |
4449 | static int | |
1107ccfb | 4450 | dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) |
1da177e4 | 4451 | { |
543691a4 | 4452 | struct dasd_eckd_private *private = device->private; |
1da177e4 LT |
4453 | struct attrib_data_t attrib; |
4454 | ||
4455 | if (!capable(CAP_SYS_ADMIN)) | |
4456 | return -EACCES; | |
1107ccfb | 4457 | if (!argp) |
1da177e4 LT |
4458 | return -EINVAL; |
4459 | ||
1107ccfb | 4460 | if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) |
1da177e4 | 4461 | return -EFAULT; |
1da177e4 LT |
4462 | private->attrib = attrib; |
4463 | ||
fc19f381 SH |
4464 | dev_info(&device->cdev->dev, |
4465 | "The DASD cache mode was set to %x (%i cylinder prestage)\n", | |
4466 | private->attrib.operation, private->attrib.nr_cyl); | |
1da177e4 LT |
4467 | return 0; |
4468 | } | |
4469 | ||
ab1d848f NH |
4470 | /* |
4471 | * Issue syscall I/O to EMC Symmetrix array. | |
4472 | * CCWs are PSF and RSSD | |
4473 | */ | |
4474 | static int dasd_symm_io(struct dasd_device *device, void __user *argp) | |
4475 | { | |
4476 | struct dasd_symmio_parms usrparm; | |
4477 | char *psf_data, *rssd_result; | |
4478 | struct dasd_ccw_req *cqr; | |
4479 | struct ccw1 *ccw; | |
52898025 | 4480 | char psf0, psf1; |
ab1d848f NH |
4481 | int rc; |
4482 | ||
52898025 NH |
4483 | if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) |
4484 | return -EACCES; | |
4485 | psf0 = psf1 = 0; | |
4486 | ||
ab1d848f NH |
4487 | /* Copy parms from caller */ |
4488 | rc = -EFAULT; | |
4489 | if (copy_from_user(&usrparm, argp, sizeof(usrparm))) | |
4490 | goto out; | |
92d62891 | 4491 | if (is_compat_task()) { |
f8b06859 | 4492 | /* Make sure pointers are sane even on 31 bit. */ |
ab1d848f | 4493 | rc = -EINVAL; |
f8b06859 HC |
4494 | if ((usrparm.psf_data >> 32) != 0) |
4495 | goto out; | |
4496 | if ((usrparm.rssd_result >> 32) != 0) | |
4497 | goto out; | |
4498 | usrparm.psf_data &= 0x7fffffffULL; | |
4499 | usrparm.rssd_result &= 0x7fffffffULL; | |
ab1d848f | 4500 | } |
ab1d848f NH |
4501 | /* alloc I/O data area */ |
4502 | psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); | |
4503 | rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); | |
4504 | if (!psf_data || !rssd_result) { | |
4505 | rc = -ENOMEM; | |
4506 | goto out_free; | |
4507 | } | |
4508 | ||
4509 | /* get syscall header from user space */ | |
4510 | rc = -EFAULT; | |
4511 | if (copy_from_user(psf_data, | |
4512 | (void __user *)(unsigned long) usrparm.psf_data, | |
4513 | usrparm.psf_data_len)) | |
4514 | goto out_free; | |
52898025 NH |
4515 | psf0 = psf_data[0]; |
4516 | psf1 = psf_data[1]; | |
ab1d848f NH |
4517 | |
4518 | /* setup CCWs for PSF + RSSD */ | |
68b781fe | 4519 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device); |
ab1d848f | 4520 | if (IS_ERR(cqr)) { |
fc19f381 | 4521 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
ab1d848f NH |
4522 | "Could not allocate initialization request"); |
4523 | rc = PTR_ERR(cqr); | |
4524 | goto out_free; | |
4525 | } | |
4526 | ||
4527 | cqr->startdev = device; | |
4528 | cqr->memdev = device; | |
4529 | cqr->retries = 3; | |
4530 | cqr->expires = 10 * HZ; | |
1aae0560 | 4531 | cqr->buildclk = get_tod_clock(); |
ab1d848f NH |
4532 | cqr->status = DASD_CQR_FILLED; |
4533 | ||
4534 | /* Build the ccws */ | |
4535 | ccw = cqr->cpaddr; | |
4536 | ||
4537 | /* PSF ccw */ | |
4538 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
4539 | ccw->count = usrparm.psf_data_len; | |
4540 | ccw->flags |= CCW_FLAG_CC; | |
4541 | ccw->cda = (__u32)(addr_t) psf_data; | |
4542 | ||
4543 | ccw++; | |
4544 | ||
4545 | /* RSSD ccw */ | |
4546 | ccw->cmd_code = DASD_ECKD_CCW_RSSD; | |
4547 | ccw->count = usrparm.rssd_result_len; | |
4548 | ccw->flags = CCW_FLAG_SLI ; | |
4549 | ccw->cda = (__u32)(addr_t) rssd_result; | |
4550 | ||
4551 | rc = dasd_sleep_on(cqr); | |
4552 | if (rc) | |
4553 | goto out_sfree; | |
4554 | ||
4555 | rc = -EFAULT; | |
4556 | if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, | |
4557 | rssd_result, usrparm.rssd_result_len)) | |
4558 | goto out_sfree; | |
4559 | rc = 0; | |
4560 | ||
4561 | out_sfree: | |
4562 | dasd_sfree_request(cqr, cqr->memdev); | |
4563 | out_free: | |
4564 | kfree(rssd_result); | |
4565 | kfree(psf_data); | |
4566 | out: | |
52898025 NH |
4567 | DBF_DEV_EVENT(DBF_WARNING, device, |
4568 | "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", | |
4569 | (int) psf0, (int) psf1, rc); | |
ab1d848f NH |
4570 | return rc; |
4571 | } | |
4572 | ||
1107ccfb | 4573 | static int |
8e09f215 | 4574 | dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) |
1107ccfb | 4575 | { |
8e09f215 SW |
4576 | struct dasd_device *device = block->base; |
4577 | ||
1107ccfb CH |
4578 | switch (cmd) { |
4579 | case BIODASDGATTR: | |
4580 | return dasd_eckd_get_attrib(device, argp); | |
4581 | case BIODASDSATTR: | |
4582 | return dasd_eckd_set_attrib(device, argp); | |
4583 | case BIODASDPSRD: | |
4584 | return dasd_eckd_performance(device, argp); | |
4585 | case BIODASDRLSE: | |
4586 | return dasd_eckd_release(device); | |
4587 | case BIODASDRSRV: | |
4588 | return dasd_eckd_reserve(device); | |
4589 | case BIODASDSLCK: | |
4590 | return dasd_eckd_steal_lock(device); | |
196339f1 SW |
4591 | case BIODASDSNID: |
4592 | return dasd_eckd_snid(device, argp); | |
ab1d848f NH |
4593 | case BIODASDSYMMIO: |
4594 | return dasd_symm_io(device, argp); | |
1107ccfb | 4595 | default: |
6b79d14e | 4596 | return -ENOTTY; |
1107ccfb CH |
4597 | } |
4598 | } | |
4599 | ||
445b5b49 HH |
4600 | /* |
4601 | * Dump the range of CCWs into 'page' buffer | |
4602 | * and return number of printed chars. | |
4603 | */ | |
4d284cac | 4604 | static int |
445b5b49 HH |
4605 | dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) |
4606 | { | |
4607 | int len, count; | |
4608 | char *datap; | |
4609 | ||
4610 | len = 0; | |
4611 | while (from <= to) { | |
773bab4a | 4612 | len += sprintf(page + len, PRINTK_HEADER |
445b5b49 HH |
4613 | " CCW %p: %08X %08X DAT:", |
4614 | from, ((int *) from)[0], ((int *) from)[1]); | |
4615 | ||
4616 | /* get pointer to data (consider IDALs) */ | |
4617 | if (from->flags & CCW_FLAG_IDA) | |
4618 | datap = (char *) *((addr_t *) (addr_t) from->cda); | |
4619 | else | |
4620 | datap = (char *) ((addr_t) from->cda); | |
4621 | ||
4622 | /* dump data (max 32 bytes) */ | |
4623 | for (count = 0; count < from->count && count < 32; count++) { | |
4624 | if (count % 8 == 0) len += sprintf(page + len, " "); | |
4625 | if (count % 4 == 0) len += sprintf(page + len, " "); | |
4626 | len += sprintf(page + len, "%02x", datap[count]); | |
4627 | } | |
4628 | len += sprintf(page + len, "\n"); | |
4629 | from++; | |
4630 | } | |
4631 | return len; | |
4632 | } | |
4633 | ||
fc19f381 | 4634 | static void |
aeec92ca SH |
4635 | dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, |
4636 | char *reason) | |
fc19f381 SH |
4637 | { |
4638 | u64 *sense; | |
a5a0061f | 4639 | u64 *stat; |
aeec92ca SH |
4640 | |
4641 | sense = (u64 *) dasd_get_sense(irb); | |
a5a0061f | 4642 | stat = (u64 *) &irb->scsw; |
fc19f381 | 4643 | if (sense) { |
a5a0061f SW |
4644 | DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " |
4645 | "%016llx %016llx %016llx %016llx", | |
4646 | reason, *stat, *((u32 *) (stat + 1)), | |
ed3640b2 | 4647 | sense[0], sense[1], sense[2], sense[3]); |
fc19f381 | 4648 | } else { |
a5a0061f SW |
4649 | DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", |
4650 | reason, *stat, *((u32 *) (stat + 1)), | |
4651 | "NO VALID SENSE"); | |
fc19f381 SH |
4652 | } |
4653 | } | |
4654 | ||
1da177e4 LT |
4655 | /* |
4656 | * Print sense data and related channel program. | |
4657 | * Parts are printed because printk buffer is only 1024 bytes. | |
4658 | */ | |
f3eb5384 | 4659 | static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, |
8e09f215 | 4660 | struct dasd_ccw_req *req, struct irb *irb) |
1da177e4 LT |
4661 | { |
4662 | char *page; | |
445b5b49 HH |
4663 | struct ccw1 *first, *last, *fail, *from, *to; |
4664 | int len, sl, sct; | |
1da177e4 LT |
4665 | |
4666 | page = (char *) get_zeroed_page(GFP_ATOMIC); | |
4667 | if (page == NULL) { | |
fc19f381 SH |
4668 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
4669 | "No memory to dump sense data\n"); | |
1da177e4 LT |
4670 | return; |
4671 | } | |
445b5b49 | 4672 | /* dump the sense data */ |
773bab4a | 4673 | len = sprintf(page, PRINTK_HEADER |
1da177e4 | 4674 | " I/O status report for device %s:\n", |
2a0217d5 | 4675 | dev_name(&device->cdev->dev)); |
773bab4a | 4676 | len += sprintf(page + len, PRINTK_HEADER |
a5a0061f SW |
4677 | " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " |
4678 | "CS:%02X RC:%d\n", | |
4679 | req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), | |
4680 | scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), | |
4681 | scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), | |
4682 | req ? req->intrc : 0); | |
773bab4a | 4683 | len += sprintf(page + len, PRINTK_HEADER |
1da177e4 | 4684 | " device %s: Failing CCW: %p\n", |
2a0217d5 | 4685 | dev_name(&device->cdev->dev), |
23d805b6 | 4686 | (void *) (addr_t) irb->scsw.cmd.cpa); |
1da177e4 LT |
4687 | if (irb->esw.esw0.erw.cons) { |
4688 | for (sl = 0; sl < 4; sl++) { | |
773bab4a | 4689 | len += sprintf(page + len, PRINTK_HEADER |
1da177e4 LT |
4690 | " Sense(hex) %2d-%2d:", |
4691 | (8 * sl), ((8 * sl) + 7)); | |
4692 | ||
4693 | for (sct = 0; sct < 8; sct++) { | |
4694 | len += sprintf(page + len, " %02x", | |
4695 | irb->ecw[8 * sl + sct]); | |
4696 | } | |
4697 | len += sprintf(page + len, "\n"); | |
4698 | } | |
4699 | ||
4700 | if (irb->ecw[27] & DASD_SENSE_BIT_0) { | |
4701 | /* 24 Byte Sense Data */ | |
773bab4a | 4702 | sprintf(page + len, PRINTK_HEADER |
445b5b49 HH |
4703 | " 24 Byte: %x MSG %x, " |
4704 | "%s MSGb to SYSOP\n", | |
4705 | irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, | |
4706 | irb->ecw[1] & 0x10 ? "" : "no"); | |
1da177e4 LT |
4707 | } else { |
4708 | /* 32 Byte Sense Data */ | |
773bab4a | 4709 | sprintf(page + len, PRINTK_HEADER |
445b5b49 HH |
4710 | " 32 Byte: Format: %x " |
4711 | "Exception class %x\n", | |
4712 | irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); | |
1da177e4 LT |
4713 | } |
4714 | } else { | |
773bab4a | 4715 | sprintf(page + len, PRINTK_HEADER |
445b5b49 | 4716 | " SORRY - NO VALID SENSE AVAILABLE\n"); |
1da177e4 | 4717 | } |
773bab4a | 4718 | printk(KERN_ERR "%s", page); |
445b5b49 | 4719 | |
8e09f215 SW |
4720 | if (req) { |
4721 | /* req == NULL for unsolicited interrupts */ | |
4722 | /* dump the Channel Program (max 140 Bytes per line) */ | |
4723 | /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ | |
4724 | first = req->cpaddr; | |
4725 | for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); | |
4726 | to = min(first + 6, last); | |
773bab4a | 4727 | len = sprintf(page, PRINTK_HEADER |
8e09f215 SW |
4728 | " Related CP in req: %p\n", req); |
4729 | dasd_eckd_dump_ccw_range(first, to, page + len); | |
773bab4a | 4730 | printk(KERN_ERR "%s", page); |
1da177e4 | 4731 | |
8e09f215 SW |
4732 | /* print failing CCW area (maximum 4) */ |
4733 | /* scsw->cda is either valid or zero */ | |
4734 | len = 0; | |
4735 | from = ++to; | |
23d805b6 PO |
4736 | fail = (struct ccw1 *)(addr_t) |
4737 | irb->scsw.cmd.cpa; /* failing CCW */ | |
8e09f215 SW |
4738 | if (from < fail - 2) { |
4739 | from = fail - 2; /* there is a gap - print header */ | |
773bab4a | 4740 | len += sprintf(page, PRINTK_HEADER "......\n"); |
8e09f215 SW |
4741 | } |
4742 | to = min(fail + 1, last); | |
4743 | len += dasd_eckd_dump_ccw_range(from, to, page + len); | |
4744 | ||
4745 | /* print last CCWs (maximum 2) */ | |
4746 | from = max(from, ++to); | |
4747 | if (from < last - 1) { | |
4748 | from = last - 1; /* there is a gap - print header */ | |
773bab4a | 4749 | len += sprintf(page + len, PRINTK_HEADER "......\n"); |
8e09f215 SW |
4750 | } |
4751 | len += dasd_eckd_dump_ccw_range(from, last, page + len); | |
4752 | if (len > 0) | |
773bab4a | 4753 | printk(KERN_ERR "%s", page); |
1da177e4 | 4754 | } |
1da177e4 LT |
4755 | free_page((unsigned long) page); |
4756 | } | |
4757 | ||
f3eb5384 SW |
4758 | |
4759 | /* | |
4760 | * Print sense data from a tcw. | |
4761 | */ | |
4762 | static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, | |
4763 | struct dasd_ccw_req *req, struct irb *irb) | |
4764 | { | |
4765 | char *page; | |
4766 | int len, sl, sct, residual; | |
f3eb5384 | 4767 | struct tsb *tsb; |
ef19298b | 4768 | u8 *sense, *rcq; |
f3eb5384 SW |
4769 | |
4770 | page = (char *) get_zeroed_page(GFP_ATOMIC); | |
4771 | if (page == NULL) { | |
fc19f381 | 4772 | DBF_DEV_EVENT(DBF_WARNING, device, " %s", |
f3eb5384 SW |
4773 | "No memory to dump sense data"); |
4774 | return; | |
4775 | } | |
4776 | /* dump the sense data */ | |
773bab4a | 4777 | len = sprintf(page, PRINTK_HEADER |
f3eb5384 SW |
4778 | " I/O status report for device %s:\n", |
4779 | dev_name(&device->cdev->dev)); | |
773bab4a | 4780 | len += sprintf(page + len, PRINTK_HEADER |
a5a0061f SW |
4781 | " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " |
4782 | "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", | |
4783 | req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), | |
4784 | scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), | |
4785 | scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), | |
4786 | irb->scsw.tm.fcxs, irb->scsw.tm.schxs, | |
4787 | req ? req->intrc : 0); | |
773bab4a | 4788 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4789 | " device %s: Failing TCW: %p\n", |
4790 | dev_name(&device->cdev->dev), | |
4791 | (void *) (addr_t) irb->scsw.tm.tcw); | |
4792 | ||
4793 | tsb = NULL; | |
4794 | sense = NULL; | |
a5a0061f | 4795 | if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) |
f3eb5384 SW |
4796 | tsb = tcw_get_tsb( |
4797 | (struct tcw *)(unsigned long)irb->scsw.tm.tcw); | |
4798 | ||
b8fde722 | 4799 | if (tsb) { |
773bab4a | 4800 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 | 4801 | " tsb->length %d\n", tsb->length); |
773bab4a | 4802 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 | 4803 | " tsb->flags %x\n", tsb->flags); |
773bab4a | 4804 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 | 4805 | " tsb->dcw_offset %d\n", tsb->dcw_offset); |
773bab4a | 4806 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4807 | " tsb->count %d\n", tsb->count); |
4808 | residual = tsb->count - 28; | |
773bab4a | 4809 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4810 | " residual %d\n", residual); |
4811 | ||
4812 | switch (tsb->flags & 0x07) { | |
4813 | case 1: /* tsa_iostat */ | |
773bab4a | 4814 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4815 | " tsb->tsa.iostat.dev_time %d\n", |
4816 | tsb->tsa.iostat.dev_time); | |
773bab4a | 4817 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4818 | " tsb->tsa.iostat.def_time %d\n", |
4819 | tsb->tsa.iostat.def_time); | |
773bab4a | 4820 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4821 | " tsb->tsa.iostat.queue_time %d\n", |
4822 | tsb->tsa.iostat.queue_time); | |
773bab4a | 4823 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4824 | " tsb->tsa.iostat.dev_busy_time %d\n", |
4825 | tsb->tsa.iostat.dev_busy_time); | |
773bab4a | 4826 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4827 | " tsb->tsa.iostat.dev_act_time %d\n", |
4828 | tsb->tsa.iostat.dev_act_time); | |
4829 | sense = tsb->tsa.iostat.sense; | |
4830 | break; | |
4831 | case 2: /* ts_ddpc */ | |
773bab4a | 4832 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 | 4833 | " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); |
ef19298b | 4834 | for (sl = 0; sl < 2; sl++) { |
773bab4a | 4835 | len += sprintf(page + len, PRINTK_HEADER |
ef19298b SW |
4836 | " tsb->tsa.ddpc.rcq %2d-%2d: ", |
4837 | (8 * sl), ((8 * sl) + 7)); | |
4838 | rcq = tsb->tsa.ddpc.rcq; | |
f3eb5384 SW |
4839 | for (sct = 0; sct < 8; sct++) { |
4840 | len += sprintf(page + len, " %02x", | |
ef19298b | 4841 | rcq[8 * sl + sct]); |
f3eb5384 SW |
4842 | } |
4843 | len += sprintf(page + len, "\n"); | |
4844 | } | |
4845 | sense = tsb->tsa.ddpc.sense; | |
4846 | break; | |
4847 | case 3: /* tsa_intrg */ | |
773bab4a SO |
4848 | len += sprintf(page + len, PRINTK_HEADER |
4849 | " tsb->tsa.intrg.: not supportet yet\n"); | |
f3eb5384 SW |
4850 | break; |
4851 | } | |
4852 | ||
4853 | if (sense) { | |
4854 | for (sl = 0; sl < 4; sl++) { | |
773bab4a | 4855 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4856 | " Sense(hex) %2d-%2d:", |
4857 | (8 * sl), ((8 * sl) + 7)); | |
4858 | for (sct = 0; sct < 8; sct++) { | |
4859 | len += sprintf(page + len, " %02x", | |
4860 | sense[8 * sl + sct]); | |
4861 | } | |
4862 | len += sprintf(page + len, "\n"); | |
4863 | } | |
4864 | ||
4865 | if (sense[27] & DASD_SENSE_BIT_0) { | |
4866 | /* 24 Byte Sense Data */ | |
773bab4a | 4867 | sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4868 | " 24 Byte: %x MSG %x, " |
4869 | "%s MSGb to SYSOP\n", | |
4870 | sense[7] >> 4, sense[7] & 0x0f, | |
4871 | sense[1] & 0x10 ? "" : "no"); | |
4872 | } else { | |
4873 | /* 32 Byte Sense Data */ | |
773bab4a | 4874 | sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4875 | " 32 Byte: Format: %x " |
4876 | "Exception class %x\n", | |
4877 | sense[6] & 0x0f, sense[22] >> 4); | |
4878 | } | |
4879 | } else { | |
773bab4a | 4880 | sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4881 | " SORRY - NO VALID SENSE AVAILABLE\n"); |
4882 | } | |
4883 | } else { | |
773bab4a | 4884 | sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4885 | " SORRY - NO TSB DATA AVAILABLE\n"); |
4886 | } | |
773bab4a | 4887 | printk(KERN_ERR "%s", page); |
f3eb5384 SW |
4888 | free_page((unsigned long) page); |
4889 | } | |
4890 | ||
4891 | static void dasd_eckd_dump_sense(struct dasd_device *device, | |
4892 | struct dasd_ccw_req *req, struct irb *irb) | |
4893 | { | |
8fd57520 JH |
4894 | u8 *sense = dasd_get_sense(irb); |
4895 | ||
4896 | if (scsw_is_tm(&irb->scsw)) { | |
4897 | /* | |
4898 | * In some cases the 'File Protected' or 'Incorrect Length' | |
4899 | * error might be expected and log messages shouldn't be written | |
4900 | * then. Check if the according suppress bit is set. | |
4901 | */ | |
4902 | if (sense && (sense[1] & SNS1_FILE_PROTECTED) && | |
4903 | test_bit(DASD_CQR_SUPPRESS_FP, &req->flags)) | |
4904 | return; | |
4905 | if (scsw_cstat(&irb->scsw) == 0x40 && | |
4906 | test_bit(DASD_CQR_SUPPRESS_IL, &req->flags)) | |
4907 | return; | |
4908 | ||
f3eb5384 | 4909 | dasd_eckd_dump_sense_tcw(device, req, irb); |
8fd57520 JH |
4910 | } else { |
4911 | /* | |
4912 | * In some cases the 'No Record Found' error might be expected | |
4913 | * and log messages shouldn't be written then. Check if the | |
4914 | * according suppress bit is set. | |
4915 | */ | |
4916 | if (sense && sense[1] & SNS1_NO_REC_FOUND && | |
4917 | test_bit(DASD_CQR_SUPPRESS_NRF, &req->flags)) | |
4918 | return; | |
4919 | ||
f3eb5384 | 4920 | dasd_eckd_dump_sense_ccw(device, req, irb); |
8fd57520 | 4921 | } |
f3eb5384 SW |
4922 | } |
4923 | ||
501183f2 | 4924 | static int dasd_eckd_pm_freeze(struct dasd_device *device) |
d41dd122 SH |
4925 | { |
4926 | /* | |
4927 | * the device should be disconnected from our LCU structure | |
4928 | * on restore we will reconnect it and reread LCU specific | |
4929 | * information like PAV support that might have changed | |
4930 | */ | |
4931 | dasd_alias_remove_device(device); | |
4932 | dasd_alias_disconnect_device_from_lcu(device); | |
4933 | ||
4934 | return 0; | |
4935 | } | |
4936 | ||
501183f2 | 4937 | static int dasd_eckd_restore_device(struct dasd_device *device) |
d41dd122 | 4938 | { |
543691a4 | 4939 | struct dasd_eckd_private *private = device->private; |
6fca97a9 | 4940 | struct dasd_eckd_characteristics temp_rdc_data; |
f9f8d02f | 4941 | int rc; |
d41dd122 | 4942 | struct dasd_uid temp_uid; |
a7602f6c | 4943 | unsigned long flags; |
ea4da6ea | 4944 | unsigned long cqr_flags = 0; |
d41dd122 | 4945 | |
d41dd122 | 4946 | /* Read Configuration Data */ |
251afd69 SH |
4947 | rc = dasd_eckd_read_conf(device); |
4948 | if (rc) { | |
4949 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, | |
4950 | "Read configuration data failed, rc=%d", rc); | |
4951 | goto out_err; | |
4952 | } | |
d41dd122 | 4953 | |
2dedf0d9 SH |
4954 | dasd_eckd_get_uid(device, &temp_uid); |
4955 | /* Generate device unique id */ | |
4956 | rc = dasd_eckd_generate_uid(device); | |
4957 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); | |
d41dd122 | 4958 | if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) |
a7602f6c SH |
4959 | dev_err(&device->cdev->dev, "The UID of the DASD has " |
4960 | "changed\n"); | |
2dedf0d9 | 4961 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
d41dd122 SH |
4962 | if (rc) |
4963 | goto out_err; | |
d41dd122 SH |
4964 | |
4965 | /* register lcu with alias handling, enable PAV if this is a new lcu */ | |
f9f8d02f SH |
4966 | rc = dasd_alias_make_device_known_to_lcu(device); |
4967 | if (rc) | |
251afd69 | 4968 | goto out_err; |
ea4da6ea SH |
4969 | |
4970 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags); | |
4971 | dasd_eckd_validate_server(device, cqr_flags); | |
f4ac1d02 SW |
4972 | |
4973 | /* RE-Read Configuration Data */ | |
251afd69 SH |
4974 | rc = dasd_eckd_read_conf(device); |
4975 | if (rc) { | |
4976 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, | |
4977 | "Read configuration data failed, rc=%d", rc); | |
4978 | goto out_err2; | |
4979 | } | |
d41dd122 SH |
4980 | |
4981 | /* Read Feature Codes */ | |
68d1e5f0 | 4982 | dasd_eckd_read_features(device); |
d41dd122 SH |
4983 | |
4984 | /* Read Device Characteristics */ | |
68b781fe | 4985 | rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, |
6fca97a9 | 4986 | &temp_rdc_data, 64); |
d41dd122 | 4987 | if (rc) { |
b8ed5dd5 SH |
4988 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, |
4989 | "Read device characteristic failed, rc=%d", rc); | |
251afd69 | 4990 | goto out_err2; |
d41dd122 | 4991 | } |
a7602f6c | 4992 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); |
6fca97a9 | 4993 | memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); |
a7602f6c | 4994 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
d41dd122 SH |
4995 | |
4996 | /* add device to alias management */ | |
4997 | dasd_alias_add_device(device); | |
4998 | ||
4999 | return 0; | |
5000 | ||
251afd69 SH |
5001 | out_err2: |
5002 | dasd_alias_disconnect_device_from_lcu(device); | |
d41dd122 | 5003 | out_err: |
e6125fba | 5004 | return -1; |
d41dd122 SH |
5005 | } |
5006 | ||
501183f2 SH |
5007 | static int dasd_eckd_reload_device(struct dasd_device *device) |
5008 | { | |
543691a4 | 5009 | struct dasd_eckd_private *private = device->private; |
501183f2 | 5010 | int rc, old_base; |
2dedf0d9 SH |
5011 | char print_uid[60]; |
5012 | struct dasd_uid uid; | |
5013 | unsigned long flags; | |
501183f2 | 5014 | |
59a9ed5f SH |
5015 | /* |
5016 | * remove device from alias handling to prevent new requests | |
5017 | * from being scheduled on the wrong alias device | |
5018 | */ | |
5019 | dasd_alias_remove_device(device); | |
5020 | ||
2dedf0d9 | 5021 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); |
501183f2 | 5022 | old_base = private->uid.base_unit_addr; |
2dedf0d9 SH |
5023 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
5024 | ||
501183f2 SH |
5025 | /* Read Configuration Data */ |
5026 | rc = dasd_eckd_read_conf(device); | |
5027 | if (rc) | |
5028 | goto out_err; | |
5029 | ||
2dedf0d9 | 5030 | rc = dasd_eckd_generate_uid(device); |
501183f2 SH |
5031 | if (rc) |
5032 | goto out_err; | |
501183f2 SH |
5033 | /* |
5034 | * update unit address configuration and | |
5035 | * add device to alias management | |
5036 | */ | |
5037 | dasd_alias_update_add_device(device); | |
5038 | ||
2dedf0d9 SH |
5039 | dasd_eckd_get_uid(device, &uid); |
5040 | ||
5041 | if (old_base != uid.base_unit_addr) { | |
5042 | if (strlen(uid.vduit) > 0) | |
5043 | snprintf(print_uid, sizeof(print_uid), | |
5044 | "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, | |
5045 | uid.ssid, uid.base_unit_addr, uid.vduit); | |
501183f2 | 5046 | else |
2dedf0d9 SH |
5047 | snprintf(print_uid, sizeof(print_uid), |
5048 | "%s.%s.%04x.%02x", uid.vendor, uid.serial, | |
5049 | uid.ssid, uid.base_unit_addr); | |
501183f2 SH |
5050 | |
5051 | dev_info(&device->cdev->dev, | |
5052 | "An Alias device was reassigned to a new base device " | |
2dedf0d9 | 5053 | "with UID: %s\n", print_uid); |
501183f2 SH |
5054 | } |
5055 | return 0; | |
5056 | ||
5057 | out_err: | |
5058 | return -1; | |
5059 | } | |
5060 | ||
5db8440c SH |
5061 | static int dasd_eckd_read_message_buffer(struct dasd_device *device, |
5062 | struct dasd_rssd_messages *messages, | |
5063 | __u8 lpum) | |
5064 | { | |
5065 | struct dasd_rssd_messages *message_buf; | |
5066 | struct dasd_psf_prssd_data *prssdp; | |
5db8440c SH |
5067 | struct dasd_ccw_req *cqr; |
5068 | struct ccw1 *ccw; | |
5069 | int rc; | |
5070 | ||
5db8440c SH |
5071 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, |
5072 | (sizeof(struct dasd_psf_prssd_data) + | |
5073 | sizeof(struct dasd_rssd_messages)), | |
5074 | device); | |
5075 | if (IS_ERR(cqr)) { | |
5076 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
5077 | "Could not allocate read message buffer request"); | |
5078 | return PTR_ERR(cqr); | |
5079 | } | |
5080 | ||
5081 | cqr->startdev = device; | |
5082 | cqr->memdev = device; | |
5083 | cqr->block = NULL; | |
5db8440c | 5084 | cqr->expires = 10 * HZ; |
5db8440c | 5085 | set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); |
b179b037 SH |
5086 | /* dasd_sleep_on_immediatly does not do complex error |
5087 | * recovery so clear erp flag and set retry counter to | |
5088 | * do basic erp */ | |
5089 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); | |
5090 | cqr->retries = 256; | |
5db8440c SH |
5091 | |
5092 | /* Prepare for Read Subsystem Data */ | |
5093 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
5094 | memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); | |
5095 | prssdp->order = PSF_ORDER_PRSSD; | |
5096 | prssdp->suborder = 0x03; /* Message Buffer */ | |
5097 | /* all other bytes of prssdp must be zero */ | |
5098 | ||
5099 | ccw = cqr->cpaddr; | |
5100 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
5101 | ccw->count = sizeof(struct dasd_psf_prssd_data); | |
5102 | ccw->flags |= CCW_FLAG_CC; | |
5103 | ccw->flags |= CCW_FLAG_SLI; | |
5104 | ccw->cda = (__u32)(addr_t) prssdp; | |
5105 | ||
5106 | /* Read Subsystem Data - message buffer */ | |
5107 | message_buf = (struct dasd_rssd_messages *) (prssdp + 1); | |
5108 | memset(message_buf, 0, sizeof(struct dasd_rssd_messages)); | |
5109 | ||
5110 | ccw++; | |
5111 | ccw->cmd_code = DASD_ECKD_CCW_RSSD; | |
5112 | ccw->count = sizeof(struct dasd_rssd_messages); | |
5113 | ccw->flags |= CCW_FLAG_SLI; | |
5114 | ccw->cda = (__u32)(addr_t) message_buf; | |
5115 | ||
5116 | cqr->buildclk = get_tod_clock(); | |
5117 | cqr->status = DASD_CQR_FILLED; | |
5118 | rc = dasd_sleep_on_immediatly(cqr); | |
5119 | if (rc == 0) { | |
5120 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
5121 | message_buf = (struct dasd_rssd_messages *) | |
5122 | (prssdp + 1); | |
5123 | memcpy(messages, message_buf, | |
5124 | sizeof(struct dasd_rssd_messages)); | |
5125 | } else | |
5126 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, | |
5127 | "Reading messages failed with rc=%d\n" | |
5128 | , rc); | |
5129 | dasd_sfree_request(cqr, cqr->memdev); | |
5130 | return rc; | |
5131 | } | |
5132 | ||
5a3b7b11 SH |
5133 | static int dasd_eckd_query_host_access(struct dasd_device *device, |
5134 | struct dasd_psf_query_host_access *data) | |
5135 | { | |
5136 | struct dasd_eckd_private *private = device->private; | |
5137 | struct dasd_psf_query_host_access *host_access; | |
5138 | struct dasd_psf_prssd_data *prssdp; | |
5139 | struct dasd_ccw_req *cqr; | |
5140 | struct ccw1 *ccw; | |
5141 | int rc; | |
5142 | ||
5143 | /* not available for HYPER PAV alias devices */ | |
5144 | if (!device->block && private->lcu->pav == HYPER_PAV) | |
5145 | return -EOPNOTSUPP; | |
5146 | ||
5147 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, | |
5148 | sizeof(struct dasd_psf_prssd_data) + 1, | |
5149 | device); | |
5150 | if (IS_ERR(cqr)) { | |
5151 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
5152 | "Could not allocate read message buffer request"); | |
5153 | return PTR_ERR(cqr); | |
5154 | } | |
5155 | host_access = kzalloc(sizeof(*host_access), GFP_KERNEL | GFP_DMA); | |
5156 | if (!host_access) { | |
5157 | dasd_sfree_request(cqr, device); | |
5158 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
5159 | "Could not allocate host_access buffer"); | |
5160 | return -ENOMEM; | |
5161 | } | |
5162 | cqr->startdev = device; | |
5163 | cqr->memdev = device; | |
5164 | cqr->block = NULL; | |
5165 | cqr->retries = 256; | |
5166 | cqr->expires = 10 * HZ; | |
5167 | ||
5168 | /* Prepare for Read Subsystem Data */ | |
5169 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
5170 | memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); | |
5171 | prssdp->order = PSF_ORDER_PRSSD; | |
5172 | prssdp->suborder = PSF_SUBORDER_QHA; /* query host access */ | |
5173 | /* LSS and Volume that will be queried */ | |
5174 | prssdp->lss = private->ned->ID; | |
5175 | prssdp->volume = private->ned->unit_addr; | |
5176 | /* all other bytes of prssdp must be zero */ | |
5177 | ||
5178 | ccw = cqr->cpaddr; | |
5179 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
5180 | ccw->count = sizeof(struct dasd_psf_prssd_data); | |
5181 | ccw->flags |= CCW_FLAG_CC; | |
5182 | ccw->flags |= CCW_FLAG_SLI; | |
5183 | ccw->cda = (__u32)(addr_t) prssdp; | |
5184 | ||
5185 | /* Read Subsystem Data - query host access */ | |
5186 | ccw++; | |
5187 | ccw->cmd_code = DASD_ECKD_CCW_RSSD; | |
5188 | ccw->count = sizeof(struct dasd_psf_query_host_access); | |
5189 | ccw->flags |= CCW_FLAG_SLI; | |
5190 | ccw->cda = (__u32)(addr_t) host_access; | |
5191 | ||
5192 | cqr->buildclk = get_tod_clock(); | |
5193 | cqr->status = DASD_CQR_FILLED; | |
5194 | rc = dasd_sleep_on(cqr); | |
5195 | if (rc == 0) { | |
5196 | *data = *host_access; | |
5197 | } else { | |
5198 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, | |
5199 | "Reading host access data failed with rc=%d\n", | |
5200 | rc); | |
5201 | rc = -EOPNOTSUPP; | |
5202 | } | |
5203 | ||
5204 | dasd_sfree_request(cqr, cqr->memdev); | |
5205 | kfree(host_access); | |
5206 | return rc; | |
5207 | } | |
5208 | /* | |
5209 | * return number of grouped devices | |
5210 | */ | |
5211 | static int dasd_eckd_host_access_count(struct dasd_device *device) | |
5212 | { | |
5213 | struct dasd_psf_query_host_access *access; | |
5214 | struct dasd_ckd_path_group_entry *entry; | |
5215 | struct dasd_ckd_host_information *info; | |
5216 | int count = 0; | |
5217 | int rc, i; | |
5218 | ||
5219 | access = kzalloc(sizeof(*access), GFP_NOIO); | |
5220 | if (!access) { | |
5221 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
5222 | "Could not allocate access buffer"); | |
5223 | return -ENOMEM; | |
5224 | } | |
5225 | rc = dasd_eckd_query_host_access(device, access); | |
5226 | if (rc) { | |
5227 | kfree(access); | |
5228 | return rc; | |
5229 | } | |
5230 | ||
5231 | info = (struct dasd_ckd_host_information *) | |
5232 | access->host_access_information; | |
5233 | for (i = 0; i < info->entry_count; i++) { | |
5234 | entry = (struct dasd_ckd_path_group_entry *) | |
5235 | (info->entry + i * info->entry_size); | |
5236 | if (entry->status_flags & DASD_ECKD_PG_GROUPED) | |
5237 | count++; | |
5238 | } | |
5239 | ||
5240 | kfree(access); | |
5241 | return count; | |
5242 | } | |
5243 | ||
5244 | /* | |
5245 | * write host access information to a sequential file | |
5246 | */ | |
5247 | static int dasd_hosts_print(struct dasd_device *device, struct seq_file *m) | |
5248 | { | |
5249 | struct dasd_psf_query_host_access *access; | |
5250 | struct dasd_ckd_path_group_entry *entry; | |
5251 | struct dasd_ckd_host_information *info; | |
5252 | char sysplex[9] = ""; | |
5253 | int rc, i, j; | |
5254 | ||
5255 | access = kzalloc(sizeof(*access), GFP_NOIO); | |
5256 | if (!access) { | |
5257 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
5258 | "Could not allocate access buffer"); | |
5259 | return -ENOMEM; | |
5260 | } | |
5261 | rc = dasd_eckd_query_host_access(device, access); | |
5262 | if (rc) { | |
5263 | kfree(access); | |
5264 | return rc; | |
5265 | } | |
5266 | ||
5267 | info = (struct dasd_ckd_host_information *) | |
5268 | access->host_access_information; | |
5269 | for (i = 0; i < info->entry_count; i++) { | |
5270 | entry = (struct dasd_ckd_path_group_entry *) | |
5271 | (info->entry + i * info->entry_size); | |
5272 | /* PGID */ | |
5273 | seq_puts(m, "pgid "); | |
5274 | for (j = 0; j < 11; j++) | |
5275 | seq_printf(m, "%02x", entry->pgid[j]); | |
5276 | seq_putc(m, '\n'); | |
5277 | /* FLAGS */ | |
5278 | seq_printf(m, "status_flags %02x\n", entry->status_flags); | |
5279 | /* SYSPLEX NAME */ | |
5280 | memcpy(&sysplex, &entry->sysplex_name, sizeof(sysplex) - 1); | |
5281 | EBCASC(sysplex, sizeof(sysplex)); | |
5282 | seq_printf(m, "sysplex_name %8s\n", sysplex); | |
5283 | /* SUPPORTED CYLINDER */ | |
5284 | seq_printf(m, "supported_cylinder %d\n", entry->cylinder); | |
5285 | /* TIMESTAMP */ | |
5286 | seq_printf(m, "timestamp %lu\n", (unsigned long) | |
5287 | entry->timestamp); | |
5288 | } | |
5289 | kfree(access); | |
5290 | ||
5291 | return 0; | |
5292 | } | |
5293 | ||
5db8440c SH |
5294 | /* |
5295 | * Perform Subsystem Function - CUIR response | |
5296 | */ | |
5297 | static int | |
5298 | dasd_eckd_psf_cuir_response(struct dasd_device *device, int response, | |
5299 | __u32 message_id, | |
5300 | struct channel_path_desc *desc, | |
5301 | struct subchannel_id sch_id) | |
5302 | { | |
5303 | struct dasd_psf_cuir_response *psf_cuir; | |
5304 | struct dasd_ccw_req *cqr; | |
5305 | struct ccw1 *ccw; | |
5306 | int rc; | |
5307 | ||
5308 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , | |
5309 | sizeof(struct dasd_psf_cuir_response), | |
5310 | device); | |
5311 | ||
5312 | if (IS_ERR(cqr)) { | |
5313 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", | |
5314 | "Could not allocate PSF-CUIR request"); | |
5315 | return PTR_ERR(cqr); | |
5316 | } | |
5317 | ||
5318 | psf_cuir = (struct dasd_psf_cuir_response *)cqr->data; | |
5319 | psf_cuir->order = PSF_ORDER_CUIR_RESPONSE; | |
5320 | psf_cuir->cc = response; | |
5321 | if (desc) | |
5322 | psf_cuir->chpid = desc->chpid; | |
5323 | psf_cuir->message_id = message_id; | |
5324 | psf_cuir->cssid = sch_id.cssid; | |
5325 | psf_cuir->ssid = sch_id.ssid; | |
5db8440c SH |
5326 | ccw = cqr->cpaddr; |
5327 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
5328 | ccw->cda = (__u32)(addr_t)psf_cuir; | |
b179b037 | 5329 | ccw->flags = CCW_FLAG_SLI; |
5db8440c SH |
5330 | ccw->count = sizeof(struct dasd_psf_cuir_response); |
5331 | ||
5332 | cqr->startdev = device; | |
5333 | cqr->memdev = device; | |
5334 | cqr->block = NULL; | |
5335 | cqr->retries = 256; | |
5336 | cqr->expires = 10*HZ; | |
5337 | cqr->buildclk = get_tod_clock(); | |
5338 | cqr->status = DASD_CQR_FILLED; | |
b179b037 | 5339 | set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); |
5db8440c SH |
5340 | |
5341 | rc = dasd_sleep_on(cqr); | |
5342 | ||
5343 | dasd_sfree_request(cqr, cqr->memdev); | |
5344 | return rc; | |
5345 | } | |
5346 | ||
b179b037 SH |
5347 | /* |
5348 | * return configuration data that is referenced by record selector | |
5349 | * if a record selector is specified or per default return the | |
5350 | * conf_data pointer for the path specified by lpum | |
5351 | */ | |
5352 | static struct dasd_conf_data *dasd_eckd_get_ref_conf(struct dasd_device *device, | |
5353 | __u8 lpum, | |
5354 | struct dasd_cuir_message *cuir) | |
5db8440c | 5355 | { |
543691a4 | 5356 | struct dasd_eckd_private *private = device->private; |
b179b037 SH |
5357 | struct dasd_conf_data *conf_data; |
5358 | int path, pos; | |
5db8440c | 5359 | |
b179b037 SH |
5360 | if (cuir->record_selector == 0) |
5361 | goto out; | |
5362 | for (path = 0x80, pos = 0; path; path >>= 1, pos++) { | |
5363 | conf_data = private->path_conf_data[pos]; | |
5364 | if (conf_data->gneq.record_selector == | |
5365 | cuir->record_selector) | |
5366 | return conf_data; | |
5db8440c | 5367 | } |
b179b037 | 5368 | out: |
9d49f86d | 5369 | return private->path_conf_data[pathmask_to_pos(lpum)]; |
5db8440c SH |
5370 | } |
5371 | ||
5372 | /* | |
b179b037 SH |
5373 | * This function determines the scope of a reconfiguration request by |
5374 | * analysing the path and device selection data provided in the CUIR request. | |
5375 | * Returns a path mask containing CUIR affected paths for the give device. | |
5376 | * | |
5377 | * If the CUIR request does not contain the required information return the | |
5378 | * path mask of the path the attention message for the CUIR request was reveived | |
5379 | * on. | |
5380 | */ | |
5381 | static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum, | |
5382 | struct dasd_cuir_message *cuir) | |
5383 | { | |
543691a4 | 5384 | struct dasd_eckd_private *private = device->private; |
b179b037 SH |
5385 | struct dasd_conf_data *ref_conf_data; |
5386 | unsigned long bitmask = 0, mask = 0; | |
b179b037 SH |
5387 | struct dasd_conf_data *conf_data; |
5388 | unsigned int pos, path; | |
5389 | char *ref_gneq, *gneq; | |
5390 | char *ref_ned, *ned; | |
5391 | int tbcpm = 0; | |
5392 | ||
5393 | /* if CUIR request does not specify the scope use the path | |
5394 | the attention message was presented on */ | |
5395 | if (!cuir->ned_map || | |
5396 | !(cuir->neq_map[0] | cuir->neq_map[1] | cuir->neq_map[2])) | |
5397 | return lpum; | |
5398 | ||
b179b037 SH |
5399 | /* get reference conf data */ |
5400 | ref_conf_data = dasd_eckd_get_ref_conf(device, lpum, cuir); | |
5401 | /* reference ned is determined by ned_map field */ | |
5402 | pos = 8 - ffs(cuir->ned_map); | |
5403 | ref_ned = (char *)&ref_conf_data->neds[pos]; | |
5404 | ref_gneq = (char *)&ref_conf_data->gneq; | |
5405 | /* transfer 24 bit neq_map to mask */ | |
5406 | mask = cuir->neq_map[2]; | |
5407 | mask |= cuir->neq_map[1] << 8; | |
5408 | mask |= cuir->neq_map[0] << 16; | |
5409 | ||
5410 | for (path = 0x80; path; path >>= 1) { | |
5411 | /* initialise data per path */ | |
5412 | bitmask = mask; | |
9d49f86d | 5413 | pos = pathmask_to_pos(path); |
b179b037 SH |
5414 | conf_data = private->path_conf_data[pos]; |
5415 | pos = 8 - ffs(cuir->ned_map); | |
5416 | ned = (char *) &conf_data->neds[pos]; | |
5417 | /* compare reference ned and per path ned */ | |
5418 | if (memcmp(ref_ned, ned, sizeof(*ned)) != 0) | |
5419 | continue; | |
5420 | gneq = (char *)&conf_data->gneq; | |
5421 | /* compare reference gneq and per_path gneq under | |
5422 | 24 bit mask where mask bit 0 equals byte 7 of | |
5423 | the gneq and mask bit 24 equals byte 31 */ | |
5424 | while (bitmask) { | |
5425 | pos = ffs(bitmask) - 1; | |
5426 | if (memcmp(&ref_gneq[31 - pos], &gneq[31 - pos], 1) | |
5427 | != 0) | |
5428 | break; | |
5429 | clear_bit(pos, &bitmask); | |
5430 | } | |
5431 | if (bitmask) | |
5432 | continue; | |
5433 | /* device and path match the reference values | |
5434 | add path to CUIR scope */ | |
5435 | tbcpm |= path; | |
5436 | } | |
5437 | return tbcpm; | |
5438 | } | |
5439 | ||
5440 | static void dasd_eckd_cuir_notify_user(struct dasd_device *device, | |
5441 | unsigned long paths, | |
5442 | struct subchannel_id sch_id, int action) | |
5443 | { | |
5444 | struct channel_path_desc *desc; | |
5445 | int pos; | |
5446 | ||
5447 | while (paths) { | |
5448 | /* get position of bit in mask */ | |
5449 | pos = ffs(paths) - 1; | |
5450 | /* get channel path descriptor from this position */ | |
5451 | desc = ccw_device_get_chp_desc(device->cdev, 7 - pos); | |
5452 | if (action == CUIR_QUIESCE) | |
5453 | pr_warn("Service on the storage server caused path " | |
5454 | "%x.%02x to go offline", sch_id.cssid, | |
5455 | desc ? desc->chpid : 0); | |
5456 | else if (action == CUIR_RESUME) | |
5457 | pr_info("Path %x.%02x is back online after service " | |
5458 | "on the storage server", sch_id.cssid, | |
5459 | desc ? desc->chpid : 0); | |
5460 | kfree(desc); | |
5461 | clear_bit(pos, &paths); | |
5462 | } | |
5463 | } | |
5464 | ||
5465 | static int dasd_eckd_cuir_remove_path(struct dasd_device *device, __u8 lpum, | |
5466 | struct dasd_cuir_message *cuir) | |
5467 | { | |
5468 | unsigned long tbcpm; | |
5469 | ||
5470 | tbcpm = dasd_eckd_cuir_scope(device, lpum, cuir); | |
5471 | /* nothing to do if path is not in use */ | |
5472 | if (!(device->path_data.opm & tbcpm)) | |
5473 | return 0; | |
5474 | if (!(device->path_data.opm & ~tbcpm)) { | |
5475 | /* no path would be left if the CUIR action is taken | |
5476 | return error */ | |
5477 | return -EINVAL; | |
5478 | } | |
5479 | /* remove device from operational path mask */ | |
5480 | device->path_data.opm &= ~tbcpm; | |
5481 | device->path_data.cuirpm |= tbcpm; | |
5482 | return tbcpm; | |
5483 | } | |
5484 | ||
5485 | /* | |
5486 | * walk through all devices and build a path mask to quiesce them | |
5487 | * return an error if the last path to a device would be removed | |
5db8440c SH |
5488 | * |
5489 | * if only part of the devices are quiesced and an error | |
5490 | * occurs no onlining necessary, the storage server will | |
5491 | * notify the already set offline devices again | |
5492 | */ | |
5493 | static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum, | |
b179b037 SH |
5494 | struct subchannel_id sch_id, |
5495 | struct dasd_cuir_message *cuir) | |
5db8440c | 5496 | { |
543691a4 | 5497 | struct dasd_eckd_private *private = device->private; |
5db8440c | 5498 | struct alias_pav_group *pavgroup, *tempgroup; |
5db8440c | 5499 | struct dasd_device *dev, *n; |
b179b037 SH |
5500 | unsigned long paths = 0; |
5501 | unsigned long flags; | |
5502 | int tbcpm; | |
5db8440c | 5503 | |
5db8440c | 5504 | /* active devices */ |
b179b037 | 5505 | list_for_each_entry_safe(dev, n, &private->lcu->active_devices, |
5db8440c | 5506 | alias_list) { |
b179b037 SH |
5507 | spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); |
5508 | tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); | |
5509 | spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); | |
5510 | if (tbcpm < 0) | |
5511 | goto out_err; | |
5512 | paths |= tbcpm; | |
5db8440c | 5513 | } |
5db8440c | 5514 | /* inactive devices */ |
b179b037 | 5515 | list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, |
5db8440c | 5516 | alias_list) { |
b179b037 SH |
5517 | spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); |
5518 | tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); | |
5519 | spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); | |
5520 | if (tbcpm < 0) | |
5521 | goto out_err; | |
5522 | paths |= tbcpm; | |
5db8440c | 5523 | } |
5db8440c SH |
5524 | /* devices in PAV groups */ |
5525 | list_for_each_entry_safe(pavgroup, tempgroup, | |
5526 | &private->lcu->grouplist, group) { | |
5527 | list_for_each_entry_safe(dev, n, &pavgroup->baselist, | |
5528 | alias_list) { | |
b179b037 SH |
5529 | spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); |
5530 | tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); | |
5531 | spin_unlock_irqrestore( | |
5532 | get_ccwdev_lock(dev->cdev), flags); | |
5533 | if (tbcpm < 0) | |
5534 | goto out_err; | |
5535 | paths |= tbcpm; | |
5db8440c SH |
5536 | } |
5537 | list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, | |
5538 | alias_list) { | |
b179b037 SH |
5539 | spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); |
5540 | tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); | |
5541 | spin_unlock_irqrestore( | |
5542 | get_ccwdev_lock(dev->cdev), flags); | |
5543 | if (tbcpm < 0) | |
5544 | goto out_err; | |
5545 | paths |= tbcpm; | |
5db8440c SH |
5546 | } |
5547 | } | |
b179b037 SH |
5548 | /* notify user about all paths affected by CUIR action */ |
5549 | dasd_eckd_cuir_notify_user(device, paths, sch_id, CUIR_QUIESCE); | |
5550 | return 0; | |
5551 | out_err: | |
5552 | return tbcpm; | |
5db8440c SH |
5553 | } |
5554 | ||
5555 | static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum, | |
b179b037 SH |
5556 | struct subchannel_id sch_id, |
5557 | struct dasd_cuir_message *cuir) | |
5db8440c | 5558 | { |
543691a4 | 5559 | struct dasd_eckd_private *private = device->private; |
5db8440c | 5560 | struct alias_pav_group *pavgroup, *tempgroup; |
5db8440c | 5561 | struct dasd_device *dev, *n; |
b179b037 SH |
5562 | unsigned long paths = 0; |
5563 | int tbcpm; | |
5db8440c | 5564 | |
5db8440c SH |
5565 | /* |
5566 | * the path may have been added through a generic path event before | |
5567 | * only trigger path verification if the path is not already in use | |
5568 | */ | |
5db8440c SH |
5569 | list_for_each_entry_safe(dev, n, |
5570 | &private->lcu->active_devices, | |
5571 | alias_list) { | |
b179b037 SH |
5572 | tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); |
5573 | paths |= tbcpm; | |
5574 | if (!(dev->path_data.opm & tbcpm)) { | |
5575 | dev->path_data.tbvpm |= tbcpm; | |
5db8440c SH |
5576 | dasd_schedule_device_bh(dev); |
5577 | } | |
5578 | } | |
5db8440c SH |
5579 | list_for_each_entry_safe(dev, n, |
5580 | &private->lcu->inactive_devices, | |
5581 | alias_list) { | |
b179b037 SH |
5582 | tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); |
5583 | paths |= tbcpm; | |
5584 | if (!(dev->path_data.opm & tbcpm)) { | |
5585 | dev->path_data.tbvpm |= tbcpm; | |
5db8440c SH |
5586 | dasd_schedule_device_bh(dev); |
5587 | } | |
5588 | } | |
5db8440c SH |
5589 | /* devices in PAV groups */ |
5590 | list_for_each_entry_safe(pavgroup, tempgroup, | |
5591 | &private->lcu->grouplist, | |
5592 | group) { | |
5593 | list_for_each_entry_safe(dev, n, | |
5594 | &pavgroup->baselist, | |
5595 | alias_list) { | |
b179b037 SH |
5596 | tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); |
5597 | paths |= tbcpm; | |
5598 | if (!(dev->path_data.opm & tbcpm)) { | |
5599 | dev->path_data.tbvpm |= tbcpm; | |
5db8440c SH |
5600 | dasd_schedule_device_bh(dev); |
5601 | } | |
5602 | } | |
5603 | list_for_each_entry_safe(dev, n, | |
5604 | &pavgroup->aliaslist, | |
5605 | alias_list) { | |
b179b037 SH |
5606 | tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); |
5607 | paths |= tbcpm; | |
5608 | if (!(dev->path_data.opm & tbcpm)) { | |
5609 | dev->path_data.tbvpm |= tbcpm; | |
5db8440c SH |
5610 | dasd_schedule_device_bh(dev); |
5611 | } | |
5612 | } | |
5613 | } | |
b179b037 SH |
5614 | /* notify user about all paths affected by CUIR action */ |
5615 | dasd_eckd_cuir_notify_user(device, paths, sch_id, CUIR_RESUME); | |
5616 | return 0; | |
5db8440c SH |
5617 | } |
5618 | ||
5619 | static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages, | |
5620 | __u8 lpum) | |
5621 | { | |
5622 | struct dasd_cuir_message *cuir = messages; | |
5623 | struct channel_path_desc *desc; | |
5624 | struct subchannel_id sch_id; | |
5625 | int pos, response; | |
5db8440c | 5626 | |
b179b037 SH |
5627 | DBF_DEV_EVENT(DBF_WARNING, device, |
5628 | "CUIR request: %016llx %016llx %016llx %08x", | |
5629 | ((u64 *)cuir)[0], ((u64 *)cuir)[1], ((u64 *)cuir)[2], | |
5630 | ((u32 *)cuir)[3]); | |
5631 | ccw_device_get_schid(device->cdev, &sch_id); | |
9d49f86d | 5632 | pos = pathmask_to_pos(lpum); |
5db8440c SH |
5633 | desc = ccw_device_get_chp_desc(device->cdev, pos); |
5634 | ||
5635 | if (cuir->code == CUIR_QUIESCE) { | |
5636 | /* quiesce */ | |
b179b037 SH |
5637 | if (dasd_eckd_cuir_quiesce(device, lpum, sch_id, cuir)) |
5638 | response = PSF_CUIR_LAST_PATH; | |
5639 | else | |
5640 | response = PSF_CUIR_COMPLETED; | |
5db8440c SH |
5641 | } else if (cuir->code == CUIR_RESUME) { |
5642 | /* resume */ | |
b179b037 SH |
5643 | dasd_eckd_cuir_resume(device, lpum, sch_id, cuir); |
5644 | response = PSF_CUIR_COMPLETED; | |
5db8440c SH |
5645 | } else |
5646 | response = PSF_CUIR_NOT_SUPPORTED; | |
5647 | ||
b179b037 SH |
5648 | dasd_eckd_psf_cuir_response(device, response, |
5649 | cuir->message_id, desc, sch_id); | |
5650 | DBF_DEV_EVENT(DBF_WARNING, device, | |
5651 | "CUIR response: %d on message ID %08x", response, | |
5652 | cuir->message_id); | |
5db8440c SH |
5653 | /* free descriptor copy */ |
5654 | kfree(desc); | |
b179b037 SH |
5655 | /* to make sure there is no attention left schedule work again */ |
5656 | device->discipline->check_attention(device, lpum); | |
5db8440c SH |
5657 | } |
5658 | ||
5659 | static void dasd_eckd_check_attention_work(struct work_struct *work) | |
5660 | { | |
5661 | struct check_attention_work_data *data; | |
5662 | struct dasd_rssd_messages *messages; | |
5663 | struct dasd_device *device; | |
5664 | int rc; | |
5665 | ||
5666 | data = container_of(work, struct check_attention_work_data, worker); | |
5667 | device = data->device; | |
5db8440c SH |
5668 | messages = kzalloc(sizeof(*messages), GFP_KERNEL); |
5669 | if (!messages) { | |
5670 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", | |
5671 | "Could not allocate attention message buffer"); | |
5672 | goto out; | |
5673 | } | |
5db8440c SH |
5674 | rc = dasd_eckd_read_message_buffer(device, messages, data->lpum); |
5675 | if (rc) | |
5676 | goto out; | |
5db8440c SH |
5677 | if (messages->length == ATTENTION_LENGTH_CUIR && |
5678 | messages->format == ATTENTION_FORMAT_CUIR) | |
5679 | dasd_eckd_handle_cuir(device, messages, data->lpum); | |
5db8440c SH |
5680 | out: |
5681 | dasd_put_device(device); | |
5682 | kfree(messages); | |
5683 | kfree(data); | |
5684 | } | |
5685 | ||
5686 | static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum) | |
5687 | { | |
5688 | struct check_attention_work_data *data; | |
5689 | ||
5690 | data = kzalloc(sizeof(*data), GFP_ATOMIC); | |
5691 | if (!data) | |
5692 | return -ENOMEM; | |
5693 | INIT_WORK(&data->worker, dasd_eckd_check_attention_work); | |
5694 | dasd_get_device(device); | |
5695 | data->device = device; | |
5696 | data->lpum = lpum; | |
5697 | schedule_work(&data->worker); | |
5698 | return 0; | |
5699 | } | |
5700 | ||
d41dd122 | 5701 | static struct ccw_driver dasd_eckd_driver = { |
3bda058b SO |
5702 | .driver = { |
5703 | .name = "dasd-eckd", | |
5704 | .owner = THIS_MODULE, | |
5705 | }, | |
d41dd122 SH |
5706 | .ids = dasd_eckd_ids, |
5707 | .probe = dasd_eckd_probe, | |
5708 | .remove = dasd_generic_remove, | |
5709 | .set_offline = dasd_generic_set_offline, | |
5710 | .set_online = dasd_eckd_set_online, | |
5711 | .notify = dasd_generic_notify, | |
a4d26c6a | 5712 | .path_event = dasd_generic_path_event, |
4679e893 | 5713 | .shutdown = dasd_generic_shutdown, |
d41dd122 SH |
5714 | .freeze = dasd_generic_pm_freeze, |
5715 | .thaw = dasd_generic_restore_device, | |
5716 | .restore = dasd_generic_restore_device, | |
a23ed009 | 5717 | .uc_handler = dasd_generic_uc_handler, |
420f42ec | 5718 | .int_class = IRQIO_DAS, |
d41dd122 | 5719 | }; |
f3eb5384 | 5720 | |
1da177e4 LT |
5721 | /* |
5722 | * max_blocks is dependent on the amount of storage that is available | |
5723 | * in the static io buffer for each device. Currently each device has | |
5724 | * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has | |
5725 | * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use | |
5726 | * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In | |
5727 | * addition we have one define extent ccw + 16 bytes of data and one | |
5728 | * locate record ccw + 16 bytes of data. That makes: | |
5729 | * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. | |
5730 | * We want to fit two into the available memory so that we can immediately | |
5731 | * start the next request if one finishes off. That makes 249.5 blocks | |
5732 | * for one request. Give a little safety and the result is 240. | |
5733 | */ | |
5734 | static struct dasd_discipline dasd_eckd_discipline = { | |
5735 | .owner = THIS_MODULE, | |
5736 | .name = "ECKD", | |
5737 | .ebcname = "ECKD", | |
ef19298b | 5738 | .max_blocks = 190, |
1da177e4 | 5739 | .check_device = dasd_eckd_check_characteristics, |
8e09f215 | 5740 | .uncheck_device = dasd_eckd_uncheck_device, |
1da177e4 | 5741 | .do_analysis = dasd_eckd_do_analysis, |
a4d26c6a | 5742 | .verify_path = dasd_eckd_verify_path, |
d42e1712 | 5743 | .basic_to_ready = dasd_eckd_basic_to_ready, |
8e09f215 | 5744 | .online_to_ready = dasd_eckd_online_to_ready, |
daa991bf | 5745 | .basic_to_known = dasd_eckd_basic_to_known, |
1da177e4 LT |
5746 | .fill_geometry = dasd_eckd_fill_geometry, |
5747 | .start_IO = dasd_start_IO, | |
5748 | .term_IO = dasd_term_IO, | |
8e09f215 | 5749 | .handle_terminated_request = dasd_eckd_handle_terminated_request, |
1da177e4 | 5750 | .format_device = dasd_eckd_format_device, |
8fd57520 | 5751 | .check_device_format = dasd_eckd_check_device_format, |
1da177e4 LT |
5752 | .erp_action = dasd_eckd_erp_action, |
5753 | .erp_postaction = dasd_eckd_erp_postaction, | |
5a27e60d | 5754 | .check_for_device_change = dasd_eckd_check_for_device_change, |
8e09f215 SW |
5755 | .build_cp = dasd_eckd_build_alias_cp, |
5756 | .free_cp = dasd_eckd_free_alias_cp, | |
1da177e4 | 5757 | .dump_sense = dasd_eckd_dump_sense, |
fc19f381 | 5758 | .dump_sense_dbf = dasd_eckd_dump_sense_dbf, |
1da177e4 | 5759 | .fill_info = dasd_eckd_fill_info, |
1107ccfb | 5760 | .ioctl = dasd_eckd_ioctl, |
d41dd122 SH |
5761 | .freeze = dasd_eckd_pm_freeze, |
5762 | .restore = dasd_eckd_restore_device, | |
501183f2 | 5763 | .reload = dasd_eckd_reload_device, |
2dedf0d9 | 5764 | .get_uid = dasd_eckd_get_uid, |
f1633031 | 5765 | .kick_validate = dasd_eckd_kick_validate_server, |
5db8440c | 5766 | .check_attention = dasd_eckd_check_attention, |
5a3b7b11 SH |
5767 | .host_access_count = dasd_eckd_host_access_count, |
5768 | .hosts_print = dasd_hosts_print, | |
1da177e4 LT |
5769 | }; |
5770 | ||
5771 | static int __init | |
5772 | dasd_eckd_init(void) | |
5773 | { | |
736e6ea0 SO |
5774 | int ret; |
5775 | ||
1da177e4 | 5776 | ASCEBC(dasd_eckd_discipline.ebcname, 4); |
f932bcea SW |
5777 | dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), |
5778 | GFP_KERNEL | GFP_DMA); | |
5779 | if (!dasd_reserve_req) | |
5780 | return -ENOMEM; | |
a4d26c6a SW |
5781 | path_verification_worker = kmalloc(sizeof(*path_verification_worker), |
5782 | GFP_KERNEL | GFP_DMA); | |
5783 | if (!path_verification_worker) { | |
5784 | kfree(dasd_reserve_req); | |
5785 | return -ENOMEM; | |
5786 | } | |
558b9ef0 SW |
5787 | rawpadpage = (void *)__get_free_page(GFP_KERNEL); |
5788 | if (!rawpadpage) { | |
5789 | kfree(path_verification_worker); | |
5790 | kfree(dasd_reserve_req); | |
5791 | return -ENOMEM; | |
5792 | } | |
736e6ea0 SO |
5793 | ret = ccw_driver_register(&dasd_eckd_driver); |
5794 | if (!ret) | |
5795 | wait_for_device_probe(); | |
a4d26c6a SW |
5796 | else { |
5797 | kfree(path_verification_worker); | |
f932bcea | 5798 | kfree(dasd_reserve_req); |
558b9ef0 | 5799 | free_page((unsigned long)rawpadpage); |
a4d26c6a | 5800 | } |
736e6ea0 | 5801 | return ret; |
1da177e4 LT |
5802 | } |
5803 | ||
5804 | static void __exit | |
5805 | dasd_eckd_cleanup(void) | |
5806 | { | |
5807 | ccw_driver_unregister(&dasd_eckd_driver); | |
a4d26c6a | 5808 | kfree(path_verification_worker); |
f932bcea | 5809 | kfree(dasd_reserve_req); |
558b9ef0 | 5810 | free_page((unsigned long)rawpadpage); |
1da177e4 LT |
5811 | } |
5812 | ||
5813 | module_init(dasd_eckd_init); | |
5814 | module_exit(dasd_eckd_cleanup); |