Commit | Line | Data |
---|---|---|
138c014d | 1 | /* |
1da177e4 | 2 | * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> |
138c014d | 3 | * Horst Hummel <Horst.Hummel@de.ibm.com> |
1da177e4 LT |
4 | * Carsten Otte <Cotte@de.ibm.com> |
5 | * Martin Schwidefsky <schwidefsky@de.ibm.com> | |
6 | * Bugreports.to..: <Linux390@de.ibm.com> | |
d41dd122 | 7 | * Copyright IBM Corp. 1999, 2009 |
ab1d848f NH |
8 | * EMC Symmetrix ioctl Copyright EMC Corporation, 2008 |
9 | * Author.........: Nigel Hislop <hislop_nigel@emc.com> | |
1da177e4 LT |
10 | */ |
11 | ||
ca99dab0 | 12 | #define KMSG_COMPONENT "dasd-eckd" |
fc19f381 | 13 | |
1da177e4 LT |
14 | #include <linux/stddef.h> |
15 | #include <linux/kernel.h> | |
16 | #include <linux/slab.h> | |
17 | #include <linux/hdreg.h> /* HDIO_GETGEO */ | |
18 | #include <linux/bio.h> | |
19 | #include <linux/module.h> | |
048cd4e5 | 20 | #include <linux/compat.h> |
1da177e4 LT |
21 | #include <linux/init.h> |
22 | ||
382b7366 | 23 | #include <asm/css_chars.h> |
1da177e4 LT |
24 | #include <asm/debug.h> |
25 | #include <asm/idals.h> | |
26 | #include <asm/ebcdic.h> | |
27 | #include <asm/io.h> | |
1da177e4 | 28 | #include <asm/uaccess.h> |
40545573 | 29 | #include <asm/cio.h> |
1da177e4 | 30 | #include <asm/ccwdev.h> |
f3eb5384 | 31 | #include <asm/itcw.h> |
5db8440c SH |
32 | #include <asm/schid.h> |
33 | #include <asm/chpid.h> | |
1da177e4 LT |
34 | |
35 | #include "dasd_int.h" | |
36 | #include "dasd_eckd.h" | |
37 | ||
38 | #ifdef PRINTK_HEADER | |
39 | #undef PRINTK_HEADER | |
40 | #endif /* PRINTK_HEADER */ | |
41 | #define PRINTK_HEADER "dasd(eckd):" | |
42 | ||
43 | #define ECKD_C0(i) (i->home_bytes) | |
44 | #define ECKD_F(i) (i->formula) | |
45 | #define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\ | |
46 | (i->factors.f_0x02.f1)) | |
47 | #define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\ | |
48 | (i->factors.f_0x02.f2)) | |
49 | #define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\ | |
50 | (i->factors.f_0x02.f3)) | |
51 | #define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0) | |
52 | #define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0) | |
53 | #define ECKD_F6(i) (i->factor6) | |
54 | #define ECKD_F7(i) (i->factor7) | |
55 | #define ECKD_F8(i) (i->factor8) | |
56 | ||
e4dbb0f2 SH |
57 | /* |
58 | * raw track access always map to 64k in memory | |
59 | * so it maps to 16 blocks of 4k per track | |
60 | */ | |
61 | #define DASD_RAW_BLOCK_PER_TRACK 16 | |
62 | #define DASD_RAW_BLOCKSIZE 4096 | |
63 | /* 64k are 128 x 512 byte sectors */ | |
64 | #define DASD_RAW_SECTORS_PER_TRACK 128 | |
65 | ||
1da177e4 LT |
66 | MODULE_LICENSE("GPL"); |
67 | ||
68 | static struct dasd_discipline dasd_eckd_discipline; | |
69 | ||
1da177e4 LT |
70 | /* The ccw bus type uses this table to find devices that it sends to |
71 | * dasd_eckd_probe */ | |
72 | static struct ccw_device_id dasd_eckd_ids[] = { | |
d2c993d8 HC |
73 | { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1}, |
74 | { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2}, | |
5da24b76 | 75 | { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info = 0x3}, |
d2c993d8 HC |
76 | { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4}, |
77 | { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5}, | |
78 | { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6}, | |
79 | { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7}, | |
80 | { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8}, | |
81 | { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9}, | |
82 | { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa}, | |
1da177e4 LT |
83 | { /* end of list */ }, |
84 | }; | |
85 | ||
86 | MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids); | |
87 | ||
88 | static struct ccw_driver dasd_eckd_driver; /* see below */ | |
89 | ||
558b9ef0 SW |
90 | static void *rawpadpage; |
91 | ||
eb6e199b SW |
92 | #define INIT_CQR_OK 0 |
93 | #define INIT_CQR_UNFORMATTED 1 | |
94 | #define INIT_CQR_ERROR 2 | |
95 | ||
f932bcea SW |
96 | /* emergency request for reserve/release */ |
97 | static struct { | |
98 | struct dasd_ccw_req cqr; | |
99 | struct ccw1 ccw; | |
100 | char data[32]; | |
101 | } *dasd_reserve_req; | |
102 | static DEFINE_MUTEX(dasd_reserve_mutex); | |
103 | ||
a4d26c6a SW |
104 | /* definitions for the path verification worker */ |
105 | struct path_verification_work_data { | |
106 | struct work_struct worker; | |
107 | struct dasd_device *device; | |
108 | struct dasd_ccw_req cqr; | |
109 | struct ccw1 ccw; | |
110 | __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE]; | |
111 | int isglobal; | |
112 | __u8 tbvpm; | |
113 | }; | |
114 | static struct path_verification_work_data *path_verification_worker; | |
115 | static DEFINE_MUTEX(dasd_path_verification_mutex); | |
eb6e199b | 116 | |
5db8440c SH |
117 | struct check_attention_work_data { |
118 | struct work_struct worker; | |
119 | struct dasd_device *device; | |
120 | __u8 lpum; | |
121 | }; | |
122 | ||
1da177e4 LT |
123 | /* initial attempt at a probe function. this can be simplified once |
124 | * the other detection code is gone */ | |
125 | static int | |
126 | dasd_eckd_probe (struct ccw_device *cdev) | |
127 | { | |
128 | int ret; | |
129 | ||
40545573 | 130 | /* set ECKD specific ccw-device options */ |
454e1fa1 PO |
131 | ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE | |
132 | CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH); | |
40545573 | 133 | if (ret) { |
b8ed5dd5 SH |
134 | DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", |
135 | "dasd_eckd_probe: could not set " | |
136 | "ccw-device options"); | |
1da177e4 | 137 | return ret; |
40545573 HH |
138 | } |
139 | ret = dasd_generic_probe(cdev, &dasd_eckd_discipline); | |
140 | return ret; | |
1da177e4 LT |
141 | } |
142 | ||
143 | static int | |
144 | dasd_eckd_set_online(struct ccw_device *cdev) | |
145 | { | |
40545573 | 146 | return dasd_generic_set_online(cdev, &dasd_eckd_discipline); |
1da177e4 LT |
147 | } |
148 | ||
1da177e4 LT |
149 | static const int sizes_trk0[] = { 28, 148, 84 }; |
150 | #define LABEL_SIZE 140 | |
151 | ||
3bc9fef9 SH |
152 | /* head and record addresses of count_area read in analysis ccw */ |
153 | static const int count_area_head[] = { 0, 0, 0, 0, 2 }; | |
154 | static const int count_area_rec[] = { 1, 2, 3, 4, 1 }; | |
155 | ||
1da177e4 LT |
156 | static inline unsigned int |
157 | round_up_multiple(unsigned int no, unsigned int mult) | |
158 | { | |
159 | int rem = no % mult; | |
160 | return (rem ? no - rem + mult : no); | |
161 | } | |
162 | ||
163 | static inline unsigned int | |
164 | ceil_quot(unsigned int d1, unsigned int d2) | |
165 | { | |
166 | return (d1 + (d2 - 1)) / d2; | |
167 | } | |
168 | ||
4d284cac | 169 | static unsigned int |
1da177e4 LT |
170 | recs_per_track(struct dasd_eckd_characteristics * rdc, |
171 | unsigned int kl, unsigned int dl) | |
172 | { | |
173 | int dn, kn; | |
174 | ||
175 | switch (rdc->dev_type) { | |
176 | case 0x3380: | |
177 | if (kl) | |
178 | return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + | |
179 | ceil_quot(dl + 12, 32)); | |
180 | else | |
181 | return 1499 / (15 + ceil_quot(dl + 12, 32)); | |
182 | case 0x3390: | |
183 | dn = ceil_quot(dl + 6, 232) + 1; | |
184 | if (kl) { | |
185 | kn = ceil_quot(kl + 6, 232) + 1; | |
186 | return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + | |
187 | 9 + ceil_quot(dl + 6 * dn, 34)); | |
188 | } else | |
189 | return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); | |
190 | case 0x9345: | |
191 | dn = ceil_quot(dl + 6, 232) + 1; | |
192 | if (kl) { | |
193 | kn = ceil_quot(kl + 6, 232) + 1; | |
194 | return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + | |
195 | ceil_quot(dl + 6 * dn, 34)); | |
196 | } else | |
197 | return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); | |
198 | } | |
199 | return 0; | |
200 | } | |
201 | ||
b44b0ab3 SW |
202 | static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) |
203 | { | |
204 | geo->cyl = (__u16) cyl; | |
205 | geo->head = cyl >> 16; | |
206 | geo->head <<= 4; | |
207 | geo->head |= head; | |
208 | } | |
209 | ||
4d284cac | 210 | static int |
1da177e4 LT |
211 | check_XRC (struct ccw1 *de_ccw, |
212 | struct DE_eckd_data *data, | |
213 | struct dasd_device *device) | |
214 | { | |
543691a4 | 215 | struct dasd_eckd_private *private = device->private; |
d54853ef | 216 | int rc; |
1da177e4 | 217 | |
d54853ef MS |
218 | if (!private->rdc_data.facilities.XRC_supported) |
219 | return 0; | |
1da177e4 LT |
220 | |
221 | /* switch on System Time Stamp - needed for XRC Support */ | |
d54853ef MS |
222 | data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ |
223 | data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ | |
1da177e4 | 224 | |
d54853ef MS |
225 | rc = get_sync_clock(&data->ep_sys_time); |
226 | /* Ignore return code if sync clock is switched off. */ | |
a8f6db4d | 227 | if (rc == -EOPNOTSUPP || rc == -EACCES) |
d54853ef | 228 | rc = 0; |
1da177e4 | 229 | |
8e09f215 | 230 | de_ccw->count = sizeof(struct DE_eckd_data); |
d54853ef MS |
231 | de_ccw->flags |= CCW_FLAG_SLI; |
232 | return rc; | |
233 | } | |
1da177e4 | 234 | |
4d284cac | 235 | static int |
b44b0ab3 SW |
236 | define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, |
237 | unsigned int totrk, int cmd, struct dasd_device *device) | |
1da177e4 | 238 | { |
543691a4 | 239 | struct dasd_eckd_private *private = device->private; |
b44b0ab3 SW |
240 | u32 begcyl, endcyl; |
241 | u16 heads, beghead, endhead; | |
d54853ef | 242 | int rc = 0; |
1da177e4 | 243 | |
1da177e4 LT |
244 | ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; |
245 | ccw->flags = 0; | |
246 | ccw->count = 16; | |
247 | ccw->cda = (__u32) __pa(data); | |
248 | ||
8e09f215 | 249 | memset(data, 0, sizeof(struct DE_eckd_data)); |
1da177e4 LT |
250 | switch (cmd) { |
251 | case DASD_ECKD_CCW_READ_HOME_ADDRESS: | |
252 | case DASD_ECKD_CCW_READ_RECORD_ZERO: | |
253 | case DASD_ECKD_CCW_READ: | |
254 | case DASD_ECKD_CCW_READ_MT: | |
255 | case DASD_ECKD_CCW_READ_CKD: | |
256 | case DASD_ECKD_CCW_READ_CKD_MT: | |
257 | case DASD_ECKD_CCW_READ_KD: | |
258 | case DASD_ECKD_CCW_READ_KD_MT: | |
259 | case DASD_ECKD_CCW_READ_COUNT: | |
260 | data->mask.perm = 0x1; | |
261 | data->attributes.operation = private->attrib.operation; | |
262 | break; | |
263 | case DASD_ECKD_CCW_WRITE: | |
264 | case DASD_ECKD_CCW_WRITE_MT: | |
265 | case DASD_ECKD_CCW_WRITE_KD: | |
266 | case DASD_ECKD_CCW_WRITE_KD_MT: | |
267 | data->mask.perm = 0x02; | |
268 | data->attributes.operation = private->attrib.operation; | |
d54853ef | 269 | rc = check_XRC (ccw, data, device); |
1da177e4 LT |
270 | break; |
271 | case DASD_ECKD_CCW_WRITE_CKD: | |
272 | case DASD_ECKD_CCW_WRITE_CKD_MT: | |
273 | data->attributes.operation = DASD_BYPASS_CACHE; | |
d54853ef | 274 | rc = check_XRC (ccw, data, device); |
1da177e4 LT |
275 | break; |
276 | case DASD_ECKD_CCW_ERASE: | |
277 | case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: | |
278 | case DASD_ECKD_CCW_WRITE_RECORD_ZERO: | |
279 | data->mask.perm = 0x3; | |
280 | data->mask.auth = 0x1; | |
281 | data->attributes.operation = DASD_BYPASS_CACHE; | |
d54853ef | 282 | rc = check_XRC (ccw, data, device); |
1da177e4 LT |
283 | break; |
284 | default: | |
fc19f381 SH |
285 | dev_err(&device->cdev->dev, |
286 | "0x%x is not a known command\n", cmd); | |
1da177e4 LT |
287 | break; |
288 | } | |
289 | ||
290 | data->attributes.mode = 0x3; /* ECKD */ | |
291 | ||
292 | if ((private->rdc_data.cu_type == 0x2105 || | |
293 | private->rdc_data.cu_type == 0x2107 || | |
294 | private->rdc_data.cu_type == 0x1750) | |
295 | && !(private->uses_cdl && trk < 2)) | |
296 | data->ga_extended |= 0x40; /* Regular Data Format Mode */ | |
297 | ||
b44b0ab3 SW |
298 | heads = private->rdc_data.trk_per_cyl; |
299 | begcyl = trk / heads; | |
300 | beghead = trk % heads; | |
301 | endcyl = totrk / heads; | |
302 | endhead = totrk % heads; | |
1da177e4 LT |
303 | |
304 | /* check for sequential prestage - enhance cylinder range */ | |
305 | if (data->attributes.operation == DASD_SEQ_PRESTAGE || | |
306 | data->attributes.operation == DASD_SEQ_ACCESS) { | |
138c014d | 307 | |
b44b0ab3 SW |
308 | if (endcyl + private->attrib.nr_cyl < private->real_cyl) |
309 | endcyl += private->attrib.nr_cyl; | |
1da177e4 | 310 | else |
b44b0ab3 | 311 | endcyl = (private->real_cyl - 1); |
1da177e4 LT |
312 | } |
313 | ||
b44b0ab3 SW |
314 | set_ch_t(&data->beg_ext, begcyl, beghead); |
315 | set_ch_t(&data->end_ext, endcyl, endhead); | |
d54853ef | 316 | return rc; |
1da177e4 LT |
317 | } |
318 | ||
8e09f215 SW |
319 | static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata, |
320 | struct dasd_device *device) | |
321 | { | |
543691a4 | 322 | struct dasd_eckd_private *private = device->private; |
8e09f215 SW |
323 | int rc; |
324 | ||
8e09f215 SW |
325 | if (!private->rdc_data.facilities.XRC_supported) |
326 | return 0; | |
327 | ||
328 | /* switch on System Time Stamp - needed for XRC Support */ | |
f3eb5384 SW |
329 | pfxdata->define_extent.ga_extended |= 0x08; /* 'Time Stamp Valid' */ |
330 | pfxdata->define_extent.ga_extended |= 0x02; /* 'Extended Parameter' */ | |
8e09f215 SW |
331 | pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ |
332 | ||
f3eb5384 | 333 | rc = get_sync_clock(&pfxdata->define_extent.ep_sys_time); |
8e09f215 | 334 | /* Ignore return code if sync clock is switched off. */ |
a8f6db4d | 335 | if (rc == -EOPNOTSUPP || rc == -EACCES) |
8e09f215 SW |
336 | rc = 0; |
337 | return rc; | |
338 | } | |
339 | ||
f3eb5384 SW |
340 | static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk, |
341 | unsigned int rec_on_trk, int count, int cmd, | |
342 | struct dasd_device *device, unsigned int reclen, | |
343 | unsigned int tlf) | |
344 | { | |
543691a4 | 345 | struct dasd_eckd_private *private = device->private; |
f3eb5384 SW |
346 | int sector; |
347 | int dn, d; | |
348 | ||
f3eb5384 SW |
349 | memset(data, 0, sizeof(*data)); |
350 | sector = 0; | |
351 | if (rec_on_trk) { | |
352 | switch (private->rdc_data.dev_type) { | |
353 | case 0x3390: | |
354 | dn = ceil_quot(reclen + 6, 232); | |
355 | d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); | |
356 | sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; | |
357 | break; | |
358 | case 0x3380: | |
359 | d = 7 + ceil_quot(reclen + 12, 32); | |
360 | sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; | |
361 | break; | |
362 | } | |
363 | } | |
364 | data->sector = sector; | |
365 | /* note: meaning of count depends on the operation | |
366 | * for record based I/O it's the number of records, but for | |
367 | * track based I/O it's the number of tracks | |
368 | */ | |
369 | data->count = count; | |
370 | switch (cmd) { | |
371 | case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: | |
372 | data->operation.orientation = 0x3; | |
373 | data->operation.operation = 0x03; | |
374 | break; | |
375 | case DASD_ECKD_CCW_READ_HOME_ADDRESS: | |
376 | data->operation.orientation = 0x3; | |
377 | data->operation.operation = 0x16; | |
378 | break; | |
379 | case DASD_ECKD_CCW_WRITE_RECORD_ZERO: | |
380 | data->operation.orientation = 0x1; | |
381 | data->operation.operation = 0x03; | |
382 | data->count++; | |
383 | break; | |
384 | case DASD_ECKD_CCW_READ_RECORD_ZERO: | |
385 | data->operation.orientation = 0x3; | |
386 | data->operation.operation = 0x16; | |
387 | data->count++; | |
388 | break; | |
389 | case DASD_ECKD_CCW_WRITE: | |
390 | case DASD_ECKD_CCW_WRITE_MT: | |
391 | case DASD_ECKD_CCW_WRITE_KD: | |
392 | case DASD_ECKD_CCW_WRITE_KD_MT: | |
393 | data->auxiliary.length_valid = 0x1; | |
394 | data->length = reclen; | |
395 | data->operation.operation = 0x01; | |
396 | break; | |
397 | case DASD_ECKD_CCW_WRITE_CKD: | |
398 | case DASD_ECKD_CCW_WRITE_CKD_MT: | |
399 | data->auxiliary.length_valid = 0x1; | |
400 | data->length = reclen; | |
401 | data->operation.operation = 0x03; | |
402 | break; | |
e4dbb0f2 SH |
403 | case DASD_ECKD_CCW_WRITE_FULL_TRACK: |
404 | data->operation.orientation = 0x0; | |
405 | data->operation.operation = 0x3F; | |
406 | data->extended_operation = 0x11; | |
407 | data->length = 0; | |
408 | data->extended_parameter_length = 0x02; | |
409 | if (data->count > 8) { | |
410 | data->extended_parameter[0] = 0xFF; | |
411 | data->extended_parameter[1] = 0xFF; | |
412 | data->extended_parameter[1] <<= (16 - count); | |
413 | } else { | |
414 | data->extended_parameter[0] = 0xFF; | |
415 | data->extended_parameter[0] <<= (8 - count); | |
416 | data->extended_parameter[1] = 0x00; | |
417 | } | |
418 | data->sector = 0xFF; | |
419 | break; | |
f3eb5384 SW |
420 | case DASD_ECKD_CCW_WRITE_TRACK_DATA: |
421 | data->auxiliary.length_valid = 0x1; | |
422 | data->length = reclen; /* not tlf, as one might think */ | |
423 | data->operation.operation = 0x3F; | |
424 | data->extended_operation = 0x23; | |
425 | break; | |
426 | case DASD_ECKD_CCW_READ: | |
427 | case DASD_ECKD_CCW_READ_MT: | |
428 | case DASD_ECKD_CCW_READ_KD: | |
429 | case DASD_ECKD_CCW_READ_KD_MT: | |
430 | data->auxiliary.length_valid = 0x1; | |
431 | data->length = reclen; | |
432 | data->operation.operation = 0x06; | |
433 | break; | |
434 | case DASD_ECKD_CCW_READ_CKD: | |
435 | case DASD_ECKD_CCW_READ_CKD_MT: | |
436 | data->auxiliary.length_valid = 0x1; | |
437 | data->length = reclen; | |
438 | data->operation.operation = 0x16; | |
439 | break; | |
440 | case DASD_ECKD_CCW_READ_COUNT: | |
441 | data->operation.operation = 0x06; | |
442 | break; | |
e4dbb0f2 SH |
443 | case DASD_ECKD_CCW_READ_TRACK: |
444 | data->operation.orientation = 0x1; | |
445 | data->operation.operation = 0x0C; | |
446 | data->extended_parameter_length = 0; | |
447 | data->sector = 0xFF; | |
448 | break; | |
f3eb5384 SW |
449 | case DASD_ECKD_CCW_READ_TRACK_DATA: |
450 | data->auxiliary.length_valid = 0x1; | |
451 | data->length = tlf; | |
452 | data->operation.operation = 0x0C; | |
453 | break; | |
454 | case DASD_ECKD_CCW_ERASE: | |
455 | data->length = reclen; | |
456 | data->auxiliary.length_valid = 0x1; | |
457 | data->operation.operation = 0x0b; | |
458 | break; | |
459 | default: | |
460 | DBF_DEV_EVENT(DBF_ERR, device, | |
461 | "fill LRE unknown opcode 0x%x", cmd); | |
462 | BUG(); | |
463 | } | |
464 | set_ch_t(&data->seek_addr, | |
465 | trk / private->rdc_data.trk_per_cyl, | |
466 | trk % private->rdc_data.trk_per_cyl); | |
467 | data->search_arg.cyl = data->seek_addr.cyl; | |
468 | data->search_arg.head = data->seek_addr.head; | |
469 | data->search_arg.record = rec_on_trk; | |
470 | } | |
471 | ||
472 | static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, | |
473 | unsigned int trk, unsigned int totrk, int cmd, | |
474 | struct dasd_device *basedev, struct dasd_device *startdev, | |
475 | unsigned char format, unsigned int rec_on_trk, int count, | |
476 | unsigned int blksize, unsigned int tlf) | |
8e09f215 SW |
477 | { |
478 | struct dasd_eckd_private *basepriv, *startpriv; | |
f3eb5384 SW |
479 | struct DE_eckd_data *dedata; |
480 | struct LRE_eckd_data *lredata; | |
b44b0ab3 SW |
481 | u32 begcyl, endcyl; |
482 | u16 heads, beghead, endhead; | |
8e09f215 SW |
483 | int rc = 0; |
484 | ||
543691a4 SO |
485 | basepriv = basedev->private; |
486 | startpriv = startdev->private; | |
f3eb5384 SW |
487 | dedata = &pfxdata->define_extent; |
488 | lredata = &pfxdata->locate_record; | |
8e09f215 SW |
489 | |
490 | ccw->cmd_code = DASD_ECKD_CCW_PFX; | |
491 | ccw->flags = 0; | |
e4dbb0f2 SH |
492 | if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) { |
493 | ccw->count = sizeof(*pfxdata) + 2; | |
494 | ccw->cda = (__u32) __pa(pfxdata); | |
495 | memset(pfxdata, 0, sizeof(*pfxdata) + 2); | |
496 | } else { | |
497 | ccw->count = sizeof(*pfxdata); | |
498 | ccw->cda = (__u32) __pa(pfxdata); | |
499 | memset(pfxdata, 0, sizeof(*pfxdata)); | |
500 | } | |
8e09f215 | 501 | |
8e09f215 | 502 | /* prefix data */ |
f3eb5384 SW |
503 | if (format > 1) { |
504 | DBF_DEV_EVENT(DBF_ERR, basedev, | |
505 | "PFX LRE unknown format 0x%x", format); | |
506 | BUG(); | |
507 | return -EINVAL; | |
508 | } | |
509 | pfxdata->format = format; | |
4abb08c2 SW |
510 | pfxdata->base_address = basepriv->ned->unit_addr; |
511 | pfxdata->base_lss = basepriv->ned->ID; | |
f3eb5384 | 512 | pfxdata->validity.define_extent = 1; |
8e09f215 SW |
513 | |
514 | /* private uid is kept up to date, conf_data may be outdated */ | |
515 | if (startpriv->uid.type != UA_BASE_DEVICE) { | |
516 | pfxdata->validity.verify_base = 1; | |
517 | if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) | |
518 | pfxdata->validity.hyper_pav = 1; | |
519 | } | |
520 | ||
521 | /* define extend data (mostly)*/ | |
522 | switch (cmd) { | |
523 | case DASD_ECKD_CCW_READ_HOME_ADDRESS: | |
524 | case DASD_ECKD_CCW_READ_RECORD_ZERO: | |
525 | case DASD_ECKD_CCW_READ: | |
526 | case DASD_ECKD_CCW_READ_MT: | |
527 | case DASD_ECKD_CCW_READ_CKD: | |
528 | case DASD_ECKD_CCW_READ_CKD_MT: | |
529 | case DASD_ECKD_CCW_READ_KD: | |
530 | case DASD_ECKD_CCW_READ_KD_MT: | |
531 | case DASD_ECKD_CCW_READ_COUNT: | |
f3eb5384 SW |
532 | dedata->mask.perm = 0x1; |
533 | dedata->attributes.operation = basepriv->attrib.operation; | |
534 | break; | |
e4dbb0f2 | 535 | case DASD_ECKD_CCW_READ_TRACK: |
f3eb5384 SW |
536 | case DASD_ECKD_CCW_READ_TRACK_DATA: |
537 | dedata->mask.perm = 0x1; | |
538 | dedata->attributes.operation = basepriv->attrib.operation; | |
539 | dedata->blk_size = 0; | |
8e09f215 SW |
540 | break; |
541 | case DASD_ECKD_CCW_WRITE: | |
542 | case DASD_ECKD_CCW_WRITE_MT: | |
543 | case DASD_ECKD_CCW_WRITE_KD: | |
544 | case DASD_ECKD_CCW_WRITE_KD_MT: | |
f3eb5384 SW |
545 | dedata->mask.perm = 0x02; |
546 | dedata->attributes.operation = basepriv->attrib.operation; | |
8e09f215 SW |
547 | rc = check_XRC_on_prefix(pfxdata, basedev); |
548 | break; | |
549 | case DASD_ECKD_CCW_WRITE_CKD: | |
550 | case DASD_ECKD_CCW_WRITE_CKD_MT: | |
f3eb5384 | 551 | dedata->attributes.operation = DASD_BYPASS_CACHE; |
8e09f215 SW |
552 | rc = check_XRC_on_prefix(pfxdata, basedev); |
553 | break; | |
554 | case DASD_ECKD_CCW_ERASE: | |
555 | case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: | |
556 | case DASD_ECKD_CCW_WRITE_RECORD_ZERO: | |
f3eb5384 SW |
557 | dedata->mask.perm = 0x3; |
558 | dedata->mask.auth = 0x1; | |
559 | dedata->attributes.operation = DASD_BYPASS_CACHE; | |
8e09f215 SW |
560 | rc = check_XRC_on_prefix(pfxdata, basedev); |
561 | break; | |
e4dbb0f2 SH |
562 | case DASD_ECKD_CCW_WRITE_FULL_TRACK: |
563 | dedata->mask.perm = 0x03; | |
564 | dedata->attributes.operation = basepriv->attrib.operation; | |
565 | dedata->blk_size = 0; | |
566 | break; | |
f3eb5384 SW |
567 | case DASD_ECKD_CCW_WRITE_TRACK_DATA: |
568 | dedata->mask.perm = 0x02; | |
569 | dedata->attributes.operation = basepriv->attrib.operation; | |
570 | dedata->blk_size = blksize; | |
571 | rc = check_XRC_on_prefix(pfxdata, basedev); | |
8e09f215 | 572 | break; |
f3eb5384 SW |
573 | default: |
574 | DBF_DEV_EVENT(DBF_ERR, basedev, | |
575 | "PFX LRE unknown opcode 0x%x", cmd); | |
576 | BUG(); | |
577 | return -EINVAL; | |
8e09f215 SW |
578 | } |
579 | ||
f3eb5384 | 580 | dedata->attributes.mode = 0x3; /* ECKD */ |
8e09f215 SW |
581 | |
582 | if ((basepriv->rdc_data.cu_type == 0x2105 || | |
583 | basepriv->rdc_data.cu_type == 0x2107 || | |
584 | basepriv->rdc_data.cu_type == 0x1750) | |
585 | && !(basepriv->uses_cdl && trk < 2)) | |
f3eb5384 | 586 | dedata->ga_extended |= 0x40; /* Regular Data Format Mode */ |
8e09f215 | 587 | |
b44b0ab3 SW |
588 | heads = basepriv->rdc_data.trk_per_cyl; |
589 | begcyl = trk / heads; | |
590 | beghead = trk % heads; | |
591 | endcyl = totrk / heads; | |
592 | endhead = totrk % heads; | |
8e09f215 SW |
593 | |
594 | /* check for sequential prestage - enhance cylinder range */ | |
f3eb5384 SW |
595 | if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || |
596 | dedata->attributes.operation == DASD_SEQ_ACCESS) { | |
8e09f215 | 597 | |
b44b0ab3 SW |
598 | if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) |
599 | endcyl += basepriv->attrib.nr_cyl; | |
8e09f215 | 600 | else |
b44b0ab3 | 601 | endcyl = (basepriv->real_cyl - 1); |
8e09f215 SW |
602 | } |
603 | ||
f3eb5384 SW |
604 | set_ch_t(&dedata->beg_ext, begcyl, beghead); |
605 | set_ch_t(&dedata->end_ext, endcyl, endhead); | |
606 | ||
607 | if (format == 1) { | |
608 | fill_LRE_data(lredata, trk, rec_on_trk, count, cmd, | |
609 | basedev, blksize, tlf); | |
610 | } | |
611 | ||
8e09f215 SW |
612 | return rc; |
613 | } | |
614 | ||
f3eb5384 SW |
615 | static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, |
616 | unsigned int trk, unsigned int totrk, int cmd, | |
617 | struct dasd_device *basedev, struct dasd_device *startdev) | |
618 | { | |
619 | return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev, | |
620 | 0, 0, 0, 0, 0); | |
621 | } | |
622 | ||
4d284cac | 623 | static void |
b44b0ab3 SW |
624 | locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, |
625 | unsigned int rec_on_trk, int no_rec, int cmd, | |
1da177e4 LT |
626 | struct dasd_device * device, int reclen) |
627 | { | |
543691a4 | 628 | struct dasd_eckd_private *private = device->private; |
1da177e4 LT |
629 | int sector; |
630 | int dn, d; | |
138c014d | 631 | |
1da177e4 LT |
632 | DBF_DEV_EVENT(DBF_INFO, device, |
633 | "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", | |
634 | trk, rec_on_trk, no_rec, cmd, reclen); | |
635 | ||
636 | ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; | |
637 | ccw->flags = 0; | |
638 | ccw->count = 16; | |
639 | ccw->cda = (__u32) __pa(data); | |
640 | ||
8e09f215 | 641 | memset(data, 0, sizeof(struct LO_eckd_data)); |
1da177e4 LT |
642 | sector = 0; |
643 | if (rec_on_trk) { | |
644 | switch (private->rdc_data.dev_type) { | |
645 | case 0x3390: | |
646 | dn = ceil_quot(reclen + 6, 232); | |
647 | d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); | |
648 | sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; | |
649 | break; | |
650 | case 0x3380: | |
651 | d = 7 + ceil_quot(reclen + 12, 32); | |
652 | sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; | |
653 | break; | |
654 | } | |
655 | } | |
656 | data->sector = sector; | |
657 | data->count = no_rec; | |
658 | switch (cmd) { | |
659 | case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: | |
660 | data->operation.orientation = 0x3; | |
661 | data->operation.operation = 0x03; | |
662 | break; | |
663 | case DASD_ECKD_CCW_READ_HOME_ADDRESS: | |
664 | data->operation.orientation = 0x3; | |
665 | data->operation.operation = 0x16; | |
666 | break; | |
667 | case DASD_ECKD_CCW_WRITE_RECORD_ZERO: | |
668 | data->operation.orientation = 0x1; | |
669 | data->operation.operation = 0x03; | |
670 | data->count++; | |
671 | break; | |
672 | case DASD_ECKD_CCW_READ_RECORD_ZERO: | |
673 | data->operation.orientation = 0x3; | |
674 | data->operation.operation = 0x16; | |
675 | data->count++; | |
676 | break; | |
677 | case DASD_ECKD_CCW_WRITE: | |
678 | case DASD_ECKD_CCW_WRITE_MT: | |
679 | case DASD_ECKD_CCW_WRITE_KD: | |
680 | case DASD_ECKD_CCW_WRITE_KD_MT: | |
681 | data->auxiliary.last_bytes_used = 0x1; | |
682 | data->length = reclen; | |
683 | data->operation.operation = 0x01; | |
684 | break; | |
685 | case DASD_ECKD_CCW_WRITE_CKD: | |
686 | case DASD_ECKD_CCW_WRITE_CKD_MT: | |
687 | data->auxiliary.last_bytes_used = 0x1; | |
688 | data->length = reclen; | |
689 | data->operation.operation = 0x03; | |
690 | break; | |
691 | case DASD_ECKD_CCW_READ: | |
692 | case DASD_ECKD_CCW_READ_MT: | |
693 | case DASD_ECKD_CCW_READ_KD: | |
694 | case DASD_ECKD_CCW_READ_KD_MT: | |
695 | data->auxiliary.last_bytes_used = 0x1; | |
696 | data->length = reclen; | |
697 | data->operation.operation = 0x06; | |
698 | break; | |
699 | case DASD_ECKD_CCW_READ_CKD: | |
700 | case DASD_ECKD_CCW_READ_CKD_MT: | |
701 | data->auxiliary.last_bytes_used = 0x1; | |
702 | data->length = reclen; | |
703 | data->operation.operation = 0x16; | |
704 | break; | |
705 | case DASD_ECKD_CCW_READ_COUNT: | |
706 | data->operation.operation = 0x06; | |
707 | break; | |
708 | case DASD_ECKD_CCW_ERASE: | |
709 | data->length = reclen; | |
710 | data->auxiliary.last_bytes_used = 0x1; | |
711 | data->operation.operation = 0x0b; | |
712 | break; | |
713 | default: | |
fc19f381 SH |
714 | DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record " |
715 | "opcode 0x%x", cmd); | |
1da177e4 | 716 | } |
b44b0ab3 SW |
717 | set_ch_t(&data->seek_addr, |
718 | trk / private->rdc_data.trk_per_cyl, | |
719 | trk % private->rdc_data.trk_per_cyl); | |
720 | data->search_arg.cyl = data->seek_addr.cyl; | |
721 | data->search_arg.head = data->seek_addr.head; | |
1da177e4 LT |
722 | data->search_arg.record = rec_on_trk; |
723 | } | |
724 | ||
725 | /* | |
726 | * Returns 1 if the block is one of the special blocks that needs | |
727 | * to get read/written with the KD variant of the command. | |
728 | * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and | |
729 | * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. | |
730 | * Luckily the KD variants differ only by one bit (0x08) from the | |
731 | * normal variant. So don't wonder about code like: | |
732 | * if (dasd_eckd_cdl_special(blk_per_trk, recid)) | |
733 | * ccw->cmd_code |= 0x8; | |
734 | */ | |
735 | static inline int | |
736 | dasd_eckd_cdl_special(int blk_per_trk, int recid) | |
737 | { | |
738 | if (recid < 3) | |
739 | return 1; | |
740 | if (recid < blk_per_trk) | |
741 | return 0; | |
742 | if (recid < 2 * blk_per_trk) | |
743 | return 1; | |
744 | return 0; | |
745 | } | |
746 | ||
747 | /* | |
748 | * Returns the record size for the special blocks of the cdl format. | |
749 | * Only returns something useful if dasd_eckd_cdl_special is true | |
750 | * for the recid. | |
751 | */ | |
752 | static inline int | |
753 | dasd_eckd_cdl_reclen(int recid) | |
754 | { | |
755 | if (recid < 3) | |
756 | return sizes_trk0[recid]; | |
757 | return LABEL_SIZE; | |
758 | } | |
b206181d SH |
759 | /* create unique id from private structure. */ |
760 | static void create_uid(struct dasd_eckd_private *private) | |
3d052595 | 761 | { |
4abb08c2 | 762 | int count; |
b206181d | 763 | struct dasd_uid *uid; |
3d052595 | 764 | |
2dedf0d9 | 765 | uid = &private->uid; |
3d052595 | 766 | memset(uid, 0, sizeof(struct dasd_uid)); |
4abb08c2 | 767 | memcpy(uid->vendor, private->ned->HDA_manufacturer, |
d0710c7c | 768 | sizeof(uid->vendor) - 1); |
3d052595 | 769 | EBCASC(uid->vendor, sizeof(uid->vendor) - 1); |
4abb08c2 | 770 | memcpy(uid->serial, private->ned->HDA_location, |
d0710c7c | 771 | sizeof(uid->serial) - 1); |
3d052595 | 772 | EBCASC(uid->serial, sizeof(uid->serial) - 1); |
4abb08c2 | 773 | uid->ssid = private->gneq->subsystemID; |
a419aef8 | 774 | uid->real_unit_addr = private->ned->unit_addr; |
4abb08c2 SW |
775 | if (private->sneq) { |
776 | uid->type = private->sneq->sua_flags; | |
8e09f215 | 777 | if (uid->type == UA_BASE_PAV_ALIAS) |
4abb08c2 | 778 | uid->base_unit_addr = private->sneq->base_unit_addr; |
8e09f215 SW |
779 | } else { |
780 | uid->type = UA_BASE_DEVICE; | |
781 | } | |
4abb08c2 SW |
782 | if (private->vdsneq) { |
783 | for (count = 0; count < 16; count++) { | |
784 | sprintf(uid->vduit+2*count, "%02x", | |
785 | private->vdsneq->uit[count]); | |
786 | } | |
787 | } | |
b206181d SH |
788 | } |
789 | ||
790 | /* | |
791 | * Generate device unique id that specifies the physical device. | |
792 | */ | |
793 | static int dasd_eckd_generate_uid(struct dasd_device *device) | |
794 | { | |
543691a4 | 795 | struct dasd_eckd_private *private = device->private; |
b206181d SH |
796 | unsigned long flags; |
797 | ||
b206181d SH |
798 | if (!private) |
799 | return -ENODEV; | |
800 | if (!private->ned || !private->gneq) | |
801 | return -ENODEV; | |
802 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); | |
803 | create_uid(private); | |
2dedf0d9 | 804 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
3d052595 HH |
805 | return 0; |
806 | } | |
807 | ||
2dedf0d9 SH |
808 | static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid) |
809 | { | |
543691a4 | 810 | struct dasd_eckd_private *private = device->private; |
2dedf0d9 SH |
811 | unsigned long flags; |
812 | ||
543691a4 | 813 | if (private) { |
2dedf0d9 SH |
814 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); |
815 | *uid = private->uid; | |
816 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); | |
817 | return 0; | |
818 | } | |
819 | return -EINVAL; | |
820 | } | |
821 | ||
b206181d SH |
822 | /* |
823 | * compare device UID with data of a given dasd_eckd_private structure | |
824 | * return 0 for match | |
825 | */ | |
826 | static int dasd_eckd_compare_path_uid(struct dasd_device *device, | |
827 | struct dasd_eckd_private *private) | |
828 | { | |
829 | struct dasd_uid device_uid; | |
830 | ||
831 | create_uid(private); | |
832 | dasd_eckd_get_uid(device, &device_uid); | |
833 | ||
834 | return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid)); | |
835 | } | |
836 | ||
a4d26c6a SW |
837 | static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device, |
838 | struct dasd_ccw_req *cqr, | |
839 | __u8 *rcd_buffer, | |
840 | __u8 lpm) | |
17283b56 | 841 | { |
17283b56 | 842 | struct ccw1 *ccw; |
a4d26c6a SW |
843 | /* |
844 | * buffer has to start with EBCDIC "V1.0" to show | |
845 | * support for virtual device SNEQ | |
846 | */ | |
847 | rcd_buffer[0] = 0xE5; | |
848 | rcd_buffer[1] = 0xF1; | |
849 | rcd_buffer[2] = 0x4B; | |
850 | rcd_buffer[3] = 0xF0; | |
17283b56 CH |
851 | |
852 | ccw = cqr->cpaddr; | |
a4d26c6a SW |
853 | ccw->cmd_code = DASD_ECKD_CCW_RCD; |
854 | ccw->flags = 0; | |
17283b56 | 855 | ccw->cda = (__u32)(addr_t)rcd_buffer; |
a4d26c6a SW |
856 | ccw->count = DASD_ECKD_RCD_DATA_SIZE; |
857 | cqr->magic = DASD_ECKD_MAGIC; | |
17283b56 | 858 | |
8e09f215 SW |
859 | cqr->startdev = device; |
860 | cqr->memdev = device; | |
861 | cqr->block = NULL; | |
17283b56 CH |
862 | cqr->expires = 10*HZ; |
863 | cqr->lpm = lpm; | |
eb6e199b | 864 | cqr->retries = 256; |
1aae0560 | 865 | cqr->buildclk = get_tod_clock(); |
17283b56 | 866 | cqr->status = DASD_CQR_FILLED; |
a4d26c6a SW |
867 | set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); |
868 | } | |
869 | ||
5915a873 SH |
870 | /* |
871 | * Wakeup helper for read_conf | |
872 | * if the cqr is not done and needs some error recovery | |
873 | * the buffer has to be re-initialized with the EBCDIC "V1.0" | |
874 | * to show support for virtual device SNEQ | |
875 | */ | |
876 | static void read_conf_cb(struct dasd_ccw_req *cqr, void *data) | |
877 | { | |
878 | struct ccw1 *ccw; | |
879 | __u8 *rcd_buffer; | |
880 | ||
881 | if (cqr->status != DASD_CQR_DONE) { | |
882 | ccw = cqr->cpaddr; | |
883 | rcd_buffer = (__u8 *)((addr_t) ccw->cda); | |
884 | memset(rcd_buffer, 0, sizeof(*rcd_buffer)); | |
885 | ||
886 | rcd_buffer[0] = 0xE5; | |
887 | rcd_buffer[1] = 0xF1; | |
888 | rcd_buffer[2] = 0x4B; | |
889 | rcd_buffer[3] = 0xF0; | |
890 | } | |
891 | dasd_wakeup_cb(cqr, data); | |
892 | } | |
893 | ||
a4d26c6a SW |
894 | static int dasd_eckd_read_conf_immediately(struct dasd_device *device, |
895 | struct dasd_ccw_req *cqr, | |
896 | __u8 *rcd_buffer, | |
897 | __u8 lpm) | |
898 | { | |
899 | struct ciw *ciw; | |
900 | int rc; | |
901 | /* | |
902 | * sanity check: scan for RCD command in extended SenseID data | |
903 | * some devices do not support RCD | |
904 | */ | |
905 | ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); | |
906 | if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) | |
907 | return -EOPNOTSUPP; | |
908 | ||
909 | dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm); | |
910 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); | |
5a27e60d | 911 | set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); |
a4d26c6a | 912 | cqr->retries = 5; |
5915a873 | 913 | cqr->callback = read_conf_cb; |
a4d26c6a SW |
914 | rc = dasd_sleep_on_immediatly(cqr); |
915 | return rc; | |
17283b56 CH |
916 | } |
917 | ||
918 | static int dasd_eckd_read_conf_lpm(struct dasd_device *device, | |
919 | void **rcd_buffer, | |
920 | int *rcd_buffer_size, __u8 lpm) | |
921 | { | |
922 | struct ciw *ciw; | |
923 | char *rcd_buf = NULL; | |
924 | int ret; | |
925 | struct dasd_ccw_req *cqr; | |
926 | ||
927 | /* | |
a4d26c6a SW |
928 | * sanity check: scan for RCD command in extended SenseID data |
929 | * some devices do not support RCD | |
17283b56 CH |
930 | */ |
931 | ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); | |
a4d26c6a | 932 | if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) { |
17283b56 CH |
933 | ret = -EOPNOTSUPP; |
934 | goto out_error; | |
935 | } | |
a4d26c6a | 936 | rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA); |
17283b56 CH |
937 | if (!rcd_buf) { |
938 | ret = -ENOMEM; | |
939 | goto out_error; | |
940 | } | |
a4d26c6a SW |
941 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, |
942 | 0, /* use rcd_buf as data ara */ | |
943 | device); | |
17283b56 | 944 | if (IS_ERR(cqr)) { |
a4d26c6a SW |
945 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
946 | "Could not allocate RCD request"); | |
947 | ret = -ENOMEM; | |
17283b56 CH |
948 | goto out_error; |
949 | } | |
a4d26c6a | 950 | dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm); |
5915a873 | 951 | cqr->callback = read_conf_cb; |
17283b56 CH |
952 | ret = dasd_sleep_on(cqr); |
953 | /* | |
954 | * on success we update the user input parms | |
955 | */ | |
8e09f215 | 956 | dasd_sfree_request(cqr, cqr->memdev); |
17283b56 CH |
957 | if (ret) |
958 | goto out_error; | |
959 | ||
a4d26c6a | 960 | *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE; |
17283b56 CH |
961 | *rcd_buffer = rcd_buf; |
962 | return 0; | |
963 | out_error: | |
964 | kfree(rcd_buf); | |
965 | *rcd_buffer = NULL; | |
966 | *rcd_buffer_size = 0; | |
967 | return ret; | |
968 | } | |
969 | ||
4abb08c2 SW |
970 | static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) |
971 | { | |
972 | ||
973 | struct dasd_sneq *sneq; | |
974 | int i, count; | |
975 | ||
976 | private->ned = NULL; | |
977 | private->sneq = NULL; | |
978 | private->vdsneq = NULL; | |
979 | private->gneq = NULL; | |
980 | count = private->conf_len / sizeof(struct dasd_sneq); | |
981 | sneq = (struct dasd_sneq *)private->conf_data; | |
982 | for (i = 0; i < count; ++i) { | |
983 | if (sneq->flags.identifier == 1 && sneq->format == 1) | |
984 | private->sneq = sneq; | |
985 | else if (sneq->flags.identifier == 1 && sneq->format == 4) | |
986 | private->vdsneq = (struct vd_sneq *)sneq; | |
987 | else if (sneq->flags.identifier == 2) | |
988 | private->gneq = (struct dasd_gneq *)sneq; | |
989 | else if (sneq->flags.identifier == 3 && sneq->res1 == 1) | |
990 | private->ned = (struct dasd_ned *)sneq; | |
991 | sneq++; | |
992 | } | |
993 | if (!private->ned || !private->gneq) { | |
994 | private->ned = NULL; | |
995 | private->sneq = NULL; | |
996 | private->vdsneq = NULL; | |
997 | private->gneq = NULL; | |
998 | return -EINVAL; | |
999 | } | |
1000 | return 0; | |
1001 | ||
1002 | }; | |
1003 | ||
1004 | static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) | |
1005 | { | |
1006 | struct dasd_gneq *gneq; | |
1007 | int i, count, found; | |
1008 | ||
1009 | count = conf_len / sizeof(*gneq); | |
1010 | gneq = (struct dasd_gneq *)conf_data; | |
1011 | found = 0; | |
1012 | for (i = 0; i < count; ++i) { | |
1013 | if (gneq->flags.identifier == 2) { | |
1014 | found = 1; | |
1015 | break; | |
1016 | } | |
1017 | gneq++; | |
1018 | } | |
1019 | if (found) | |
1020 | return ((char *)gneq)[18] & 0x07; | |
1021 | else | |
1022 | return 0; | |
1023 | } | |
1024 | ||
c7c0c9de SH |
1025 | static void dasd_eckd_clear_conf_data(struct dasd_device *device) |
1026 | { | |
543691a4 | 1027 | struct dasd_eckd_private *private = device->private; |
c7c0c9de SH |
1028 | int i; |
1029 | ||
c7c0c9de SH |
1030 | private->conf_data = NULL; |
1031 | private->conf_len = 0; | |
1032 | for (i = 0; i < 8; i++) { | |
1033 | kfree(private->path_conf_data[i]); | |
1034 | private->path_conf_data[i] = NULL; | |
1035 | } | |
1036 | } | |
1037 | ||
1038 | ||
4abb08c2 | 1039 | static int dasd_eckd_read_conf(struct dasd_device *device) |
1da177e4 LT |
1040 | { |
1041 | void *conf_data; | |
1042 | int conf_len, conf_data_saved; | |
b179b037 | 1043 | int rc, path_err, pos; |
a4d26c6a | 1044 | __u8 lpm, opm; |
b206181d | 1045 | struct dasd_eckd_private *private, path_private; |
a4d26c6a | 1046 | struct dasd_path *path_data; |
b206181d SH |
1047 | struct dasd_uid *uid; |
1048 | char print_path_uid[60], print_device_uid[60]; | |
1da177e4 | 1049 | |
543691a4 | 1050 | private = device->private; |
a4d26c6a SW |
1051 | path_data = &device->path_data; |
1052 | opm = ccw_device_get_path_mask(device->cdev); | |
1da177e4 | 1053 | conf_data_saved = 0; |
55d3a85c | 1054 | path_err = 0; |
1da177e4 LT |
1055 | /* get configuration data per operational path */ |
1056 | for (lpm = 0x80; lpm; lpm>>= 1) { | |
b206181d SH |
1057 | if (!(lpm & opm)) |
1058 | continue; | |
1059 | rc = dasd_eckd_read_conf_lpm(device, &conf_data, | |
1060 | &conf_len, lpm); | |
1061 | if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ | |
1062 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, | |
1063 | "Read configuration data returned " | |
1064 | "error %d", rc); | |
1065 | return rc; | |
1066 | } | |
1067 | if (conf_data == NULL) { | |
1068 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
1069 | "No configuration data " | |
1070 | "retrieved"); | |
1071 | /* no further analysis possible */ | |
1072 | path_data->opm |= lpm; | |
1073 | continue; /* no error */ | |
1074 | } | |
1075 | /* save first valid configuration data */ | |
1076 | if (!conf_data_saved) { | |
c7c0c9de SH |
1077 | /* initially clear previously stored conf_data */ |
1078 | dasd_eckd_clear_conf_data(device); | |
b206181d SH |
1079 | private->conf_data = conf_data; |
1080 | private->conf_len = conf_len; | |
1081 | if (dasd_eckd_identify_conf_parts(private)) { | |
1082 | private->conf_data = NULL; | |
1083 | private->conf_len = 0; | |
1084 | kfree(conf_data); | |
1085 | continue; | |
1da177e4 | 1086 | } |
c7c0c9de SH |
1087 | pos = pathmask_to_pos(lpm); |
1088 | /* store per path conf_data */ | |
1089 | private->path_conf_data[pos] = | |
1090 | (struct dasd_conf_data *) conf_data; | |
b206181d SH |
1091 | /* |
1092 | * build device UID that other path data | |
1093 | * can be compared to it | |
1094 | */ | |
1095 | dasd_eckd_generate_uid(device); | |
1096 | conf_data_saved++; | |
1097 | } else { | |
1098 | path_private.conf_data = conf_data; | |
1099 | path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; | |
1100 | if (dasd_eckd_identify_conf_parts( | |
1101 | &path_private)) { | |
1102 | path_private.conf_data = NULL; | |
1103 | path_private.conf_len = 0; | |
1104 | kfree(conf_data); | |
1105 | continue; | |
1da177e4 | 1106 | } |
b206181d SH |
1107 | if (dasd_eckd_compare_path_uid( |
1108 | device, &path_private)) { | |
1109 | uid = &path_private.uid; | |
1110 | if (strlen(uid->vduit) > 0) | |
1111 | snprintf(print_path_uid, | |
1112 | sizeof(print_path_uid), | |
1113 | "%s.%s.%04x.%02x.%s", | |
1114 | uid->vendor, uid->serial, | |
1115 | uid->ssid, uid->real_unit_addr, | |
1116 | uid->vduit); | |
1117 | else | |
1118 | snprintf(print_path_uid, | |
1119 | sizeof(print_path_uid), | |
1120 | "%s.%s.%04x.%02x", | |
1121 | uid->vendor, uid->serial, | |
1122 | uid->ssid, | |
1123 | uid->real_unit_addr); | |
1124 | uid = &private->uid; | |
1125 | if (strlen(uid->vduit) > 0) | |
1126 | snprintf(print_device_uid, | |
1127 | sizeof(print_device_uid), | |
1128 | "%s.%s.%04x.%02x.%s", | |
1129 | uid->vendor, uid->serial, | |
1130 | uid->ssid, uid->real_unit_addr, | |
1131 | uid->vduit); | |
1132 | else | |
1133 | snprintf(print_device_uid, | |
1134 | sizeof(print_device_uid), | |
1135 | "%s.%s.%04x.%02x", | |
1136 | uid->vendor, uid->serial, | |
1137 | uid->ssid, | |
1138 | uid->real_unit_addr); | |
1139 | dev_err(&device->cdev->dev, | |
1140 | "Not all channel paths lead to " | |
1141 | "the same device, path %02X leads to " | |
1142 | "device %s instead of %s\n", lpm, | |
1143 | print_path_uid, print_device_uid); | |
55d3a85c | 1144 | path_err = -EINVAL; |
5db8440c | 1145 | path_data->cablepm |= lpm; |
55d3a85c | 1146 | continue; |
1da177e4 | 1147 | } |
c7c0c9de SH |
1148 | pos = pathmask_to_pos(lpm); |
1149 | /* store per path conf_data */ | |
1150 | private->path_conf_data[pos] = | |
1151 | (struct dasd_conf_data *) conf_data; | |
b206181d SH |
1152 | path_private.conf_data = NULL; |
1153 | path_private.conf_len = 0; | |
1154 | } | |
1155 | switch (dasd_eckd_path_access(conf_data, conf_len)) { | |
1156 | case 0x02: | |
1157 | path_data->npm |= lpm; | |
1158 | break; | |
1159 | case 0x03: | |
1160 | path_data->ppm |= lpm; | |
1161 | break; | |
1da177e4 | 1162 | } |
ccc0e7dc SH |
1163 | if (!path_data->opm) { |
1164 | path_data->opm = lpm; | |
1165 | dasd_generic_path_operational(device); | |
1166 | } else { | |
1167 | path_data->opm |= lpm; | |
1168 | } | |
5db8440c SH |
1169 | /* |
1170 | * if the path is used | |
1171 | * it should not be in one of the negative lists | |
1172 | */ | |
1173 | path_data->cablepm &= ~lpm; | |
1174 | path_data->hpfpm &= ~lpm; | |
1175 | path_data->cuirpm &= ~lpm; | |
1da177e4 | 1176 | } |
b206181d | 1177 | |
55d3a85c | 1178 | return path_err; |
1da177e4 LT |
1179 | } |
1180 | ||
a4d26c6a SW |
1181 | static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) |
1182 | { | |
543691a4 | 1183 | struct dasd_eckd_private *private = device->private; |
a4d26c6a SW |
1184 | int mdc; |
1185 | u32 fcx_max_data; | |
1186 | ||
a4d26c6a SW |
1187 | if (private->fcx_max_data) { |
1188 | mdc = ccw_device_get_mdc(device->cdev, lpm); | |
1189 | if ((mdc < 0)) { | |
1190 | dev_warn(&device->cdev->dev, | |
1191 | "Detecting the maximum data size for zHPF " | |
1192 | "requests failed (rc=%d) for a new path %x\n", | |
1193 | mdc, lpm); | |
1194 | return mdc; | |
1195 | } | |
1196 | fcx_max_data = mdc * FCX_MAX_DATA_FACTOR; | |
1197 | if (fcx_max_data < private->fcx_max_data) { | |
1198 | dev_warn(&device->cdev->dev, | |
1199 | "The maximum data size for zHPF requests %u " | |
1200 | "on a new path %x is below the active maximum " | |
1201 | "%u\n", fcx_max_data, lpm, | |
1202 | private->fcx_max_data); | |
1203 | return -EACCES; | |
1204 | } | |
1205 | } | |
1206 | return 0; | |
1207 | } | |
1208 | ||
b206181d SH |
1209 | static int rebuild_device_uid(struct dasd_device *device, |
1210 | struct path_verification_work_data *data) | |
1211 | { | |
543691a4 SO |
1212 | struct dasd_eckd_private *private = device->private; |
1213 | struct dasd_path *path_data = &device->path_data; | |
1214 | __u8 lpm, opm = path_data->opm; | |
1215 | int rc = -ENODEV; | |
b206181d SH |
1216 | |
1217 | for (lpm = 0x80; lpm; lpm >>= 1) { | |
1218 | if (!(lpm & opm)) | |
1219 | continue; | |
1220 | memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); | |
1221 | memset(&data->cqr, 0, sizeof(data->cqr)); | |
1222 | data->cqr.cpaddr = &data->ccw; | |
1223 | rc = dasd_eckd_read_conf_immediately(device, &data->cqr, | |
1224 | data->rcd_buffer, | |
1225 | lpm); | |
1226 | ||
1227 | if (rc) { | |
1228 | if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */ | |
1229 | continue; | |
1230 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, | |
1231 | "Read configuration data " | |
1232 | "returned error %d", rc); | |
1233 | break; | |
1234 | } | |
1235 | memcpy(private->conf_data, data->rcd_buffer, | |
1236 | DASD_ECKD_RCD_DATA_SIZE); | |
1237 | if (dasd_eckd_identify_conf_parts(private)) { | |
1238 | rc = -ENODEV; | |
1239 | } else /* first valid path is enough */ | |
1240 | break; | |
1241 | } | |
1242 | ||
1243 | if (!rc) | |
1244 | rc = dasd_eckd_generate_uid(device); | |
1245 | ||
1246 | return rc; | |
1247 | } | |
1248 | ||
a4d26c6a SW |
1249 | static void do_path_verification_work(struct work_struct *work) |
1250 | { | |
1251 | struct path_verification_work_data *data; | |
1252 | struct dasd_device *device; | |
b206181d SH |
1253 | struct dasd_eckd_private path_private; |
1254 | struct dasd_uid *uid; | |
1255 | __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; | |
5db8440c | 1256 | __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm; |
a4d26c6a | 1257 | unsigned long flags; |
b206181d | 1258 | char print_uid[60]; |
a4d26c6a SW |
1259 | int rc; |
1260 | ||
1261 | data = container_of(work, struct path_verification_work_data, worker); | |
1262 | device = data->device; | |
1263 | ||
c8d1c0ff SH |
1264 | /* delay path verification until device was resumed */ |
1265 | if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { | |
1266 | schedule_work(work); | |
1267 | return; | |
1268 | } | |
1eb38023 SH |
1269 | /* check if path verification already running and delay if so */ |
1270 | if (test_and_set_bit(DASD_FLAG_PATH_VERIFY, &device->flags)) { | |
1271 | schedule_work(work); | |
1272 | return; | |
1273 | } | |
a4d26c6a SW |
1274 | opm = 0; |
1275 | npm = 0; | |
1276 | ppm = 0; | |
1277 | epm = 0; | |
5db8440c SH |
1278 | hpfpm = 0; |
1279 | cablepm = 0; | |
1280 | ||
a4d26c6a | 1281 | for (lpm = 0x80; lpm; lpm >>= 1) { |
b206181d SH |
1282 | if (!(lpm & data->tbvpm)) |
1283 | continue; | |
1284 | memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); | |
1285 | memset(&data->cqr, 0, sizeof(data->cqr)); | |
1286 | data->cqr.cpaddr = &data->ccw; | |
1287 | rc = dasd_eckd_read_conf_immediately(device, &data->cqr, | |
1288 | data->rcd_buffer, | |
1289 | lpm); | |
1290 | if (!rc) { | |
1291 | switch (dasd_eckd_path_access(data->rcd_buffer, | |
1292 | DASD_ECKD_RCD_DATA_SIZE) | |
1293 | ) { | |
1294 | case 0x02: | |
1295 | npm |= lpm; | |
1296 | break; | |
1297 | case 0x03: | |
1298 | ppm |= lpm; | |
1299 | break; | |
1300 | } | |
1301 | opm |= lpm; | |
1302 | } else if (rc == -EOPNOTSUPP) { | |
1303 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
1304 | "path verification: No configuration " | |
1305 | "data retrieved"); | |
1306 | opm |= lpm; | |
1307 | } else if (rc == -EAGAIN) { | |
1308 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
a4d26c6a SW |
1309 | "path verification: device is stopped," |
1310 | " try again later"); | |
b206181d SH |
1311 | epm |= lpm; |
1312 | } else { | |
1313 | dev_warn(&device->cdev->dev, | |
1314 | "Reading device feature codes failed " | |
1315 | "(rc=%d) for new path %x\n", rc, lpm); | |
1316 | continue; | |
1317 | } | |
1318 | if (verify_fcx_max_data(device, lpm)) { | |
1319 | opm &= ~lpm; | |
1320 | npm &= ~lpm; | |
1321 | ppm &= ~lpm; | |
5db8440c | 1322 | hpfpm |= lpm; |
b206181d SH |
1323 | continue; |
1324 | } | |
1325 | ||
1326 | /* | |
1327 | * save conf_data for comparison after | |
1328 | * rebuild_device_uid may have changed | |
1329 | * the original data | |
1330 | */ | |
1331 | memcpy(&path_rcd_buf, data->rcd_buffer, | |
1332 | DASD_ECKD_RCD_DATA_SIZE); | |
1333 | path_private.conf_data = (void *) &path_rcd_buf; | |
1334 | path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; | |
1335 | if (dasd_eckd_identify_conf_parts(&path_private)) { | |
1336 | path_private.conf_data = NULL; | |
1337 | path_private.conf_len = 0; | |
1338 | continue; | |
1339 | } | |
1340 | ||
1341 | /* | |
1342 | * compare path UID with device UID only if at least | |
1343 | * one valid path is left | |
1344 | * in other case the device UID may have changed and | |
1345 | * the first working path UID will be used as device UID | |
1346 | */ | |
1347 | if (device->path_data.opm && | |
1348 | dasd_eckd_compare_path_uid(device, &path_private)) { | |
1349 | /* | |
1350 | * the comparison was not successful | |
1351 | * rebuild the device UID with at least one | |
1352 | * known path in case a z/VM hyperswap command | |
1353 | * has changed the device | |
1354 | * | |
1355 | * after this compare again | |
1356 | * | |
1357 | * if either the rebuild or the recompare fails | |
1358 | * the path can not be used | |
1359 | */ | |
1360 | if (rebuild_device_uid(device, data) || | |
1361 | dasd_eckd_compare_path_uid( | |
1362 | device, &path_private)) { | |
1363 | uid = &path_private.uid; | |
1364 | if (strlen(uid->vduit) > 0) | |
1365 | snprintf(print_uid, sizeof(print_uid), | |
1366 | "%s.%s.%04x.%02x.%s", | |
1367 | uid->vendor, uid->serial, | |
1368 | uid->ssid, uid->real_unit_addr, | |
1369 | uid->vduit); | |
1370 | else | |
1371 | snprintf(print_uid, sizeof(print_uid), | |
1372 | "%s.%s.%04x.%02x", | |
1373 | uid->vendor, uid->serial, | |
1374 | uid->ssid, | |
1375 | uid->real_unit_addr); | |
1376 | dev_err(&device->cdev->dev, | |
1377 | "The newly added channel path %02X " | |
1378 | "will not be used because it leads " | |
1379 | "to a different device %s\n", | |
1380 | lpm, print_uid); | |
a4d26c6a SW |
1381 | opm &= ~lpm; |
1382 | npm &= ~lpm; | |
1383 | ppm &= ~lpm; | |
5db8440c | 1384 | cablepm |= lpm; |
b206181d | 1385 | continue; |
a4d26c6a SW |
1386 | } |
1387 | } | |
b206181d SH |
1388 | |
1389 | /* | |
1390 | * There is a small chance that a path is lost again between | |
1391 | * above path verification and the following modification of | |
1392 | * the device opm mask. We could avoid that race here by using | |
1393 | * yet another path mask, but we rather deal with this unlikely | |
1394 | * situation in dasd_start_IO. | |
1395 | */ | |
1396 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); | |
1397 | if (!device->path_data.opm && opm) { | |
1398 | device->path_data.opm = opm; | |
5db8440c SH |
1399 | device->path_data.cablepm &= ~opm; |
1400 | device->path_data.cuirpm &= ~opm; | |
1401 | device->path_data.hpfpm &= ~opm; | |
b206181d | 1402 | dasd_generic_path_operational(device); |
5db8440c | 1403 | } else { |
b206181d | 1404 | device->path_data.opm |= opm; |
5db8440c SH |
1405 | device->path_data.cablepm &= ~opm; |
1406 | device->path_data.cuirpm &= ~opm; | |
1407 | device->path_data.hpfpm &= ~opm; | |
1408 | } | |
b206181d SH |
1409 | device->path_data.npm |= npm; |
1410 | device->path_data.ppm |= ppm; | |
1411 | device->path_data.tbvpm |= epm; | |
5db8440c SH |
1412 | device->path_data.cablepm |= cablepm; |
1413 | device->path_data.hpfpm |= hpfpm; | |
b206181d | 1414 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
a4d26c6a | 1415 | } |
1eb38023 | 1416 | clear_bit(DASD_FLAG_PATH_VERIFY, &device->flags); |
a4d26c6a SW |
1417 | dasd_put_device(device); |
1418 | if (data->isglobal) | |
1419 | mutex_unlock(&dasd_path_verification_mutex); | |
1420 | else | |
1421 | kfree(data); | |
1422 | } | |
1423 | ||
1424 | static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm) | |
1425 | { | |
1426 | struct path_verification_work_data *data; | |
1427 | ||
1428 | data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); | |
1429 | if (!data) { | |
1430 | if (mutex_trylock(&dasd_path_verification_mutex)) { | |
1431 | data = path_verification_worker; | |
1432 | data->isglobal = 1; | |
1433 | } else | |
1434 | return -ENOMEM; | |
1435 | } else { | |
1436 | memset(data, 0, sizeof(*data)); | |
1437 | data->isglobal = 0; | |
1438 | } | |
1439 | INIT_WORK(&data->worker, do_path_verification_work); | |
1440 | dasd_get_device(device); | |
1441 | data->device = device; | |
1442 | data->tbvpm = lpm; | |
1443 | schedule_work(&data->worker); | |
1444 | return 0; | |
1445 | } | |
1446 | ||
8e09f215 SW |
1447 | static int dasd_eckd_read_features(struct dasd_device *device) |
1448 | { | |
543691a4 | 1449 | struct dasd_eckd_private *private = device->private; |
8e09f215 SW |
1450 | struct dasd_psf_prssd_data *prssdp; |
1451 | struct dasd_rssd_features *features; | |
1452 | struct dasd_ccw_req *cqr; | |
1453 | struct ccw1 *ccw; | |
1454 | int rc; | |
8e09f215 | 1455 | |
68d1e5f0 | 1456 | memset(&private->features, 0, sizeof(struct dasd_rssd_features)); |
68b781fe | 1457 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, |
8e09f215 SW |
1458 | (sizeof(struct dasd_psf_prssd_data) + |
1459 | sizeof(struct dasd_rssd_features)), | |
1460 | device); | |
1461 | if (IS_ERR(cqr)) { | |
b8ed5dd5 SH |
1462 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " |
1463 | "allocate initialization request"); | |
8e09f215 SW |
1464 | return PTR_ERR(cqr); |
1465 | } | |
1466 | cqr->startdev = device; | |
1467 | cqr->memdev = device; | |
1468 | cqr->block = NULL; | |
eb6e199b | 1469 | cqr->retries = 256; |
8e09f215 SW |
1470 | cqr->expires = 10 * HZ; |
1471 | ||
1472 | /* Prepare for Read Subsystem Data */ | |
1473 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
1474 | memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); | |
1475 | prssdp->order = PSF_ORDER_PRSSD; | |
1476 | prssdp->suborder = 0x41; /* Read Feature Codes */ | |
1477 | /* all other bytes of prssdp must be zero */ | |
1478 | ||
1479 | ccw = cqr->cpaddr; | |
1480 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
1481 | ccw->count = sizeof(struct dasd_psf_prssd_data); | |
1482 | ccw->flags |= CCW_FLAG_CC; | |
1483 | ccw->cda = (__u32)(addr_t) prssdp; | |
1484 | ||
1485 | /* Read Subsystem Data - feature codes */ | |
1486 | features = (struct dasd_rssd_features *) (prssdp + 1); | |
1487 | memset(features, 0, sizeof(struct dasd_rssd_features)); | |
1488 | ||
1489 | ccw++; | |
1490 | ccw->cmd_code = DASD_ECKD_CCW_RSSD; | |
1491 | ccw->count = sizeof(struct dasd_rssd_features); | |
1492 | ccw->cda = (__u32)(addr_t) features; | |
1493 | ||
1aae0560 | 1494 | cqr->buildclk = get_tod_clock(); |
8e09f215 SW |
1495 | cqr->status = DASD_CQR_FILLED; |
1496 | rc = dasd_sleep_on(cqr); | |
1497 | if (rc == 0) { | |
1498 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
1499 | features = (struct dasd_rssd_features *) (prssdp + 1); | |
1500 | memcpy(&private->features, features, | |
1501 | sizeof(struct dasd_rssd_features)); | |
68d1e5f0 SW |
1502 | } else |
1503 | dev_warn(&device->cdev->dev, "Reading device feature codes" | |
1504 | " failed with rc=%d\n", rc); | |
8e09f215 SW |
1505 | dasd_sfree_request(cqr, cqr->memdev); |
1506 | return rc; | |
1507 | } | |
1508 | ||
1509 | ||
40545573 HH |
1510 | /* |
1511 | * Build CP for Perform Subsystem Function - SSC. | |
1512 | */ | |
f3eb5384 SW |
1513 | static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, |
1514 | int enable_pav) | |
40545573 | 1515 | { |
8e09f215 SW |
1516 | struct dasd_ccw_req *cqr; |
1517 | struct dasd_psf_ssc_data *psf_ssc_data; | |
1518 | struct ccw1 *ccw; | |
40545573 | 1519 | |
68b781fe | 1520 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , |
40545573 HH |
1521 | sizeof(struct dasd_psf_ssc_data), |
1522 | device); | |
1523 | ||
8e09f215 | 1524 | if (IS_ERR(cqr)) { |
fc19f381 | 1525 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
40545573 | 1526 | "Could not allocate PSF-SSC request"); |
8e09f215 SW |
1527 | return cqr; |
1528 | } | |
1529 | psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; | |
1530 | psf_ssc_data->order = PSF_ORDER_SSC; | |
626350b6 | 1531 | psf_ssc_data->suborder = 0xc0; |
f3eb5384 | 1532 | if (enable_pav) { |
626350b6 | 1533 | psf_ssc_data->suborder |= 0x08; |
f3eb5384 SW |
1534 | psf_ssc_data->reserved[0] = 0x88; |
1535 | } | |
8e09f215 SW |
1536 | ccw = cqr->cpaddr; |
1537 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
1538 | ccw->cda = (__u32)(addr_t)psf_ssc_data; | |
1539 | ccw->count = 66; | |
1540 | ||
1541 | cqr->startdev = device; | |
1542 | cqr->memdev = device; | |
1543 | cqr->block = NULL; | |
eb6e199b | 1544 | cqr->retries = 256; |
8e09f215 | 1545 | cqr->expires = 10*HZ; |
1aae0560 | 1546 | cqr->buildclk = get_tod_clock(); |
8e09f215 SW |
1547 | cqr->status = DASD_CQR_FILLED; |
1548 | return cqr; | |
40545573 HH |
1549 | } |
1550 | ||
1551 | /* | |
1552 | * Perform Subsystem Function. | |
1553 | * It is necessary to trigger CIO for channel revalidation since this | |
1554 | * call might change behaviour of DASD devices. | |
1555 | */ | |
1556 | static int | |
12d7b107 SH |
1557 | dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav, |
1558 | unsigned long flags) | |
40545573 | 1559 | { |
8e09f215 SW |
1560 | struct dasd_ccw_req *cqr; |
1561 | int rc; | |
1562 | ||
f3eb5384 | 1563 | cqr = dasd_eckd_build_psf_ssc(device, enable_pav); |
8e09f215 SW |
1564 | if (IS_ERR(cqr)) |
1565 | return PTR_ERR(cqr); | |
1566 | ||
12d7b107 SH |
1567 | /* |
1568 | * set flags e.g. turn on failfast, to prevent blocking | |
1569 | * the calling function should handle failed requests | |
1570 | */ | |
1571 | cqr->flags |= flags; | |
1572 | ||
8e09f215 SW |
1573 | rc = dasd_sleep_on(cqr); |
1574 | if (!rc) | |
1575 | /* trigger CIO to reprobe devices */ | |
1576 | css_schedule_reprobe(); | |
12d7b107 SH |
1577 | else if (cqr->intrc == -EAGAIN) |
1578 | rc = -EAGAIN; | |
1579 | ||
8e09f215 SW |
1580 | dasd_sfree_request(cqr, cqr->memdev); |
1581 | return rc; | |
40545573 HH |
1582 | } |
1583 | ||
1584 | /* | |
1585 | * Valide storage server of current device. | |
1586 | */ | |
12d7b107 SH |
1587 | static int dasd_eckd_validate_server(struct dasd_device *device, |
1588 | unsigned long flags) | |
40545573 | 1589 | { |
543691a4 SO |
1590 | struct dasd_eckd_private *private = device->private; |
1591 | int enable_pav, rc; | |
40545573 | 1592 | |
f9f8d02f SH |
1593 | if (private->uid.type == UA_BASE_PAV_ALIAS || |
1594 | private->uid.type == UA_HYPER_PAV_ALIAS) | |
12d7b107 | 1595 | return 0; |
40545573 | 1596 | if (dasd_nopav || MACHINE_IS_VM) |
f3eb5384 SW |
1597 | enable_pav = 0; |
1598 | else | |
1599 | enable_pav = 1; | |
12d7b107 | 1600 | rc = dasd_eckd_psf_ssc(device, enable_pav, flags); |
eb6e199b | 1601 | |
8e79a441 HH |
1602 | /* may be requested feature is not available on server, |
1603 | * therefore just report error and go ahead */ | |
b8ed5dd5 SH |
1604 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " |
1605 | "returned rc=%d", private->uid.ssid, rc); | |
12d7b107 | 1606 | return rc; |
40545573 HH |
1607 | } |
1608 | ||
f1633031 SH |
1609 | /* |
1610 | * worker to do a validate server in case of a lost pathgroup | |
1611 | */ | |
1612 | static void dasd_eckd_do_validate_server(struct work_struct *work) | |
1613 | { | |
1614 | struct dasd_device *device = container_of(work, struct dasd_device, | |
1615 | kick_validate); | |
ea4da6ea SH |
1616 | unsigned long flags = 0; |
1617 | ||
1618 | set_bit(DASD_CQR_FLAGS_FAILFAST, &flags); | |
1619 | if (dasd_eckd_validate_server(device, flags) | |
12d7b107 SH |
1620 | == -EAGAIN) { |
1621 | /* schedule worker again if failed */ | |
1622 | schedule_work(&device->kick_validate); | |
1623 | return; | |
1624 | } | |
1625 | ||
f1633031 SH |
1626 | dasd_put_device(device); |
1627 | } | |
1628 | ||
1629 | static void dasd_eckd_kick_validate_server(struct dasd_device *device) | |
1630 | { | |
1631 | dasd_get_device(device); | |
25e2cf1c SH |
1632 | /* exit if device not online or in offline processing */ |
1633 | if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || | |
1634 | device->state < DASD_STATE_ONLINE) { | |
1635 | dasd_put_device(device); | |
1636 | return; | |
1637 | } | |
f1633031 | 1638 | /* queue call to do_validate_server to the kernel event daemon. */ |
f2608cd4 SH |
1639 | if (!schedule_work(&device->kick_validate)) |
1640 | dasd_put_device(device); | |
f1633031 SH |
1641 | } |
1642 | ||
ef19298b SW |
1643 | static u32 get_fcx_max_data(struct dasd_device *device) |
1644 | { | |
543691a4 | 1645 | struct dasd_eckd_private *private = device->private; |
ef19298b | 1646 | int fcx_in_css, fcx_in_gneq, fcx_in_features; |
543691a4 | 1647 | int tpm, mdc; |
ef19298b SW |
1648 | |
1649 | if (dasd_nofcx) | |
1650 | return 0; | |
1651 | /* is transport mode supported? */ | |
ef19298b SW |
1652 | fcx_in_css = css_general_characteristics.fcx; |
1653 | fcx_in_gneq = private->gneq->reserved2[7] & 0x04; | |
1654 | fcx_in_features = private->features.feature[40] & 0x80; | |
1655 | tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; | |
1656 | ||
1657 | if (!tpm) | |
1658 | return 0; | |
1659 | ||
1660 | mdc = ccw_device_get_mdc(device->cdev, 0); | |
1661 | if (mdc < 0) { | |
1662 | dev_warn(&device->cdev->dev, "Detecting the maximum supported" | |
1663 | " data size for zHPF requests failed\n"); | |
1664 | return 0; | |
1665 | } else | |
1666 | return mdc * FCX_MAX_DATA_FACTOR; | |
ef19298b SW |
1667 | } |
1668 | ||
3d052595 HH |
1669 | /* |
1670 | * Check device characteristics. | |
1671 | * If the device is accessible using ECKD discipline, the device is enabled. | |
1672 | */ | |
1da177e4 LT |
1673 | static int |
1674 | dasd_eckd_check_characteristics(struct dasd_device *device) | |
1675 | { | |
543691a4 | 1676 | struct dasd_eckd_private *private = device->private; |
8e09f215 | 1677 | struct dasd_block *block; |
2dedf0d9 | 1678 | struct dasd_uid temp_uid; |
f9f8d02f | 1679 | int rc, i; |
33b62a30 | 1680 | int readonly; |
7c8faa86 | 1681 | unsigned long value; |
1da177e4 | 1682 | |
f1633031 SH |
1683 | /* setup work queue for validate server*/ |
1684 | INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); | |
1685 | ||
454e1fa1 PO |
1686 | if (!ccw_device_is_pathgroup(device->cdev)) { |
1687 | dev_warn(&device->cdev->dev, | |
1688 | "A channel path group could not be established\n"); | |
1689 | return -EIO; | |
1690 | } | |
1691 | if (!ccw_device_is_multipath(device->cdev)) { | |
1692 | dev_info(&device->cdev->dev, | |
1693 | "The DASD is not operating in multipath mode\n"); | |
1694 | } | |
92636b15 SO |
1695 | if (!private) { |
1696 | private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); | |
1697 | if (!private) { | |
fc19f381 SH |
1698 | dev_warn(&device->cdev->dev, |
1699 | "Allocating memory for private DASD data " | |
1700 | "failed\n"); | |
1da177e4 LT |
1701 | return -ENOMEM; |
1702 | } | |
543691a4 | 1703 | device->private = private; |
92636b15 SO |
1704 | } else { |
1705 | memset(private, 0, sizeof(*private)); | |
1da177e4 LT |
1706 | } |
1707 | /* Invalidate status of initial analysis. */ | |
1708 | private->init_cqr_status = -1; | |
1709 | /* Set default cache operations. */ | |
1710 | private->attrib.operation = DASD_NORMAL_CACHE; | |
1711 | private->attrib.nr_cyl = 0; | |
1712 | ||
40545573 HH |
1713 | /* Read Configuration Data */ |
1714 | rc = dasd_eckd_read_conf(device); | |
1715 | if (rc) | |
8e09f215 | 1716 | goto out_err1; |
40545573 | 1717 | |
7c8faa86 SH |
1718 | /* set default timeout */ |
1719 | device->default_expires = DASD_EXPIRES; | |
1f1ee9ad HR |
1720 | /* set default retry count */ |
1721 | device->default_retries = DASD_RETRIES; | |
1722 | ||
7c8faa86 SH |
1723 | if (private->gneq) { |
1724 | value = 1; | |
1725 | for (i = 0; i < private->gneq->timeout.value; i++) | |
1726 | value = 10 * value; | |
1727 | value = value * private->gneq->timeout.number; | |
1728 | /* do not accept useless values */ | |
1729 | if (value != 0 && value <= DASD_EXPIRES_MAX) | |
1730 | device->default_expires = value; | |
1731 | } | |
1732 | ||
2dedf0d9 SH |
1733 | dasd_eckd_get_uid(device, &temp_uid); |
1734 | if (temp_uid.type == UA_BASE_DEVICE) { | |
8e09f215 SW |
1735 | block = dasd_alloc_block(); |
1736 | if (IS_ERR(block)) { | |
b8ed5dd5 SH |
1737 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", |
1738 | "could not allocate dasd " | |
1739 | "block structure"); | |
8e09f215 SW |
1740 | rc = PTR_ERR(block); |
1741 | goto out_err1; | |
1742 | } | |
1743 | device->block = block; | |
1744 | block->base = device; | |
1745 | } | |
1746 | ||
f9f8d02f SH |
1747 | /* register lcu with alias handling, enable PAV */ |
1748 | rc = dasd_alias_make_device_known_to_lcu(device); | |
1749 | if (rc) | |
8e09f215 | 1750 | goto out_err2; |
f9f8d02f | 1751 | |
12d7b107 | 1752 | dasd_eckd_validate_server(device, 0); |
f4ac1d02 SW |
1753 | |
1754 | /* device may report different configuration data after LCU setup */ | |
1755 | rc = dasd_eckd_read_conf(device); | |
1756 | if (rc) | |
1757 | goto out_err3; | |
8e09f215 SW |
1758 | |
1759 | /* Read Feature Codes */ | |
68d1e5f0 | 1760 | dasd_eckd_read_features(device); |
40545573 | 1761 | |
1da177e4 | 1762 | /* Read Device Characteristics */ |
68b781fe SH |
1763 | rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, |
1764 | &private->rdc_data, 64); | |
8e09f215 | 1765 | if (rc) { |
b8ed5dd5 SH |
1766 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, |
1767 | "Read device characteristic failed, rc=%d", rc); | |
8e09f215 SW |
1768 | goto out_err3; |
1769 | } | |
34cd551a SH |
1770 | |
1771 | if ((device->features & DASD_FEATURE_USERAW) && | |
1772 | !(private->rdc_data.facilities.RT_in_LR)) { | |
1773 | dev_err(&device->cdev->dev, "The storage server does not " | |
1774 | "support raw-track access\n"); | |
1775 | rc = -EINVAL; | |
1776 | goto out_err3; | |
1777 | } | |
1778 | ||
817f2c84 | 1779 | /* find the valid cylinder size */ |
b44b0ab3 SW |
1780 | if (private->rdc_data.no_cyl == LV_COMPAT_CYL && |
1781 | private->rdc_data.long_no_cyl) | |
1782 | private->real_cyl = private->rdc_data.long_no_cyl; | |
1783 | else | |
1784 | private->real_cyl = private->rdc_data.no_cyl; | |
1785 | ||
ef19298b SW |
1786 | private->fcx_max_data = get_fcx_max_data(device); |
1787 | ||
33b62a30 SW |
1788 | readonly = dasd_device_is_ro(device); |
1789 | if (readonly) | |
1790 | set_bit(DASD_FLAG_DEVICE_RO, &device->flags); | |
1791 | ||
fc19f381 | 1792 | dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " |
33b62a30 | 1793 | "with %d cylinders, %d heads, %d sectors%s\n", |
fc19f381 SH |
1794 | private->rdc_data.dev_type, |
1795 | private->rdc_data.dev_model, | |
1796 | private->rdc_data.cu_type, | |
1797 | private->rdc_data.cu_model.model, | |
92636b15 | 1798 | private->real_cyl, |
fc19f381 | 1799 | private->rdc_data.trk_per_cyl, |
33b62a30 SW |
1800 | private->rdc_data.sec_per_trk, |
1801 | readonly ? ", read-only device" : ""); | |
8e09f215 SW |
1802 | return 0; |
1803 | ||
1804 | out_err3: | |
1805 | dasd_alias_disconnect_device_from_lcu(device); | |
1806 | out_err2: | |
1807 | dasd_free_block(device->block); | |
1808 | device->block = NULL; | |
1809 | out_err1: | |
4abb08c2 | 1810 | kfree(private->conf_data); |
8e09f215 SW |
1811 | kfree(device->private); |
1812 | device->private = NULL; | |
3d052595 | 1813 | return rc; |
1da177e4 LT |
1814 | } |
1815 | ||
8e09f215 SW |
1816 | static void dasd_eckd_uncheck_device(struct dasd_device *device) |
1817 | { | |
543691a4 | 1818 | struct dasd_eckd_private *private = device->private; |
b179b037 | 1819 | int i; |
4abb08c2 | 1820 | |
8e09f215 | 1821 | dasd_alias_disconnect_device_from_lcu(device); |
4abb08c2 SW |
1822 | private->ned = NULL; |
1823 | private->sneq = NULL; | |
1824 | private->vdsneq = NULL; | |
1825 | private->gneq = NULL; | |
1826 | private->conf_len = 0; | |
b179b037 SH |
1827 | for (i = 0; i < 8; i++) { |
1828 | kfree(private->path_conf_data[i]); | |
1829 | if ((__u8 *)private->path_conf_data[i] == | |
1830 | private->conf_data) { | |
1831 | private->conf_data = NULL; | |
1832 | private->conf_len = 0; | |
1833 | } | |
1834 | private->path_conf_data[i] = NULL; | |
1835 | } | |
4abb08c2 SW |
1836 | kfree(private->conf_data); |
1837 | private->conf_data = NULL; | |
8e09f215 SW |
1838 | } |
1839 | ||
1da177e4 LT |
1840 | static struct dasd_ccw_req * |
1841 | dasd_eckd_analysis_ccw(struct dasd_device *device) | |
1842 | { | |
543691a4 | 1843 | struct dasd_eckd_private *private = device->private; |
1da177e4 LT |
1844 | struct eckd_count *count_data; |
1845 | struct LO_eckd_data *LO_data; | |
1846 | struct dasd_ccw_req *cqr; | |
1847 | struct ccw1 *ccw; | |
1848 | int cplength, datasize; | |
1849 | int i; | |
1850 | ||
1da177e4 LT |
1851 | cplength = 8; |
1852 | datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); | |
68b781fe | 1853 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); |
1da177e4 LT |
1854 | if (IS_ERR(cqr)) |
1855 | return cqr; | |
1856 | ccw = cqr->cpaddr; | |
1857 | /* Define extent for the first 3 tracks. */ | |
1858 | define_extent(ccw++, cqr->data, 0, 2, | |
1859 | DASD_ECKD_CCW_READ_COUNT, device); | |
8e09f215 | 1860 | LO_data = cqr->data + sizeof(struct DE_eckd_data); |
1da177e4 LT |
1861 | /* Locate record for the first 4 records on track 0. */ |
1862 | ccw[-1].flags |= CCW_FLAG_CC; | |
1863 | locate_record(ccw++, LO_data++, 0, 0, 4, | |
1864 | DASD_ECKD_CCW_READ_COUNT, device, 0); | |
1865 | ||
1866 | count_data = private->count_area; | |
1867 | for (i = 0; i < 4; i++) { | |
1868 | ccw[-1].flags |= CCW_FLAG_CC; | |
1869 | ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; | |
1870 | ccw->flags = 0; | |
1871 | ccw->count = 8; | |
1872 | ccw->cda = (__u32)(addr_t) count_data; | |
1873 | ccw++; | |
1874 | count_data++; | |
1875 | } | |
1876 | ||
1877 | /* Locate record for the first record on track 2. */ | |
1878 | ccw[-1].flags |= CCW_FLAG_CC; | |
1879 | locate_record(ccw++, LO_data++, 2, 0, 1, | |
1880 | DASD_ECKD_CCW_READ_COUNT, device, 0); | |
1881 | /* Read count ccw. */ | |
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 | ||
8e09f215 SW |
1888 | cqr->block = NULL; |
1889 | cqr->startdev = device; | |
1890 | cqr->memdev = device; | |
eb6e199b | 1891 | cqr->retries = 255; |
1aae0560 | 1892 | cqr->buildclk = get_tod_clock(); |
1da177e4 LT |
1893 | cqr->status = DASD_CQR_FILLED; |
1894 | return cqr; | |
1895 | } | |
1896 | ||
eb6e199b SW |
1897 | /* differentiate between 'no record found' and any other error */ |
1898 | static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) | |
1899 | { | |
1900 | char *sense; | |
1901 | if (init_cqr->status == DASD_CQR_DONE) | |
1902 | return INIT_CQR_OK; | |
1903 | else if (init_cqr->status == DASD_CQR_NEED_ERP || | |
1904 | init_cqr->status == DASD_CQR_FAILED) { | |
1905 | sense = dasd_get_sense(&init_cqr->irb); | |
1906 | if (sense && (sense[1] & SNS1_NO_REC_FOUND)) | |
1907 | return INIT_CQR_UNFORMATTED; | |
1908 | else | |
1909 | return INIT_CQR_ERROR; | |
1910 | } else | |
1911 | return INIT_CQR_ERROR; | |
1912 | } | |
1913 | ||
1da177e4 LT |
1914 | /* |
1915 | * This is the callback function for the init_analysis cqr. It saves | |
1916 | * the status of the initial analysis ccw before it frees it and kicks | |
1917 | * the device to continue the startup sequence. This will call | |
1918 | * dasd_eckd_do_analysis again (if the devices has not been marked | |
1919 | * for deletion in the meantime). | |
1920 | */ | |
eb6e199b SW |
1921 | static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, |
1922 | void *data) | |
1da177e4 | 1923 | { |
543691a4 SO |
1924 | struct dasd_device *device = init_cqr->startdev; |
1925 | struct dasd_eckd_private *private = device->private; | |
1da177e4 | 1926 | |
eb6e199b | 1927 | private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); |
1da177e4 LT |
1928 | dasd_sfree_request(init_cqr, device); |
1929 | dasd_kick_device(device); | |
1930 | } | |
1931 | ||
eb6e199b | 1932 | static int dasd_eckd_start_analysis(struct dasd_block *block) |
1da177e4 | 1933 | { |
1da177e4 LT |
1934 | struct dasd_ccw_req *init_cqr; |
1935 | ||
8e09f215 | 1936 | init_cqr = dasd_eckd_analysis_ccw(block->base); |
1da177e4 LT |
1937 | if (IS_ERR(init_cqr)) |
1938 | return PTR_ERR(init_cqr); | |
1939 | init_cqr->callback = dasd_eckd_analysis_callback; | |
1940 | init_cqr->callback_data = NULL; | |
1941 | init_cqr->expires = 5*HZ; | |
eb6e199b SW |
1942 | /* first try without ERP, so we can later handle unformatted |
1943 | * devices as special case | |
1944 | */ | |
1945 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); | |
1946 | init_cqr->retries = 0; | |
1da177e4 LT |
1947 | dasd_add_request_head(init_cqr); |
1948 | return -EAGAIN; | |
1949 | } | |
1950 | ||
eb6e199b | 1951 | static int dasd_eckd_end_analysis(struct dasd_block *block) |
1da177e4 | 1952 | { |
543691a4 SO |
1953 | struct dasd_device *device = block->base; |
1954 | struct dasd_eckd_private *private = device->private; | |
1da177e4 LT |
1955 | struct eckd_count *count_area; |
1956 | unsigned int sb, blk_per_trk; | |
1957 | int status, i; | |
eb6e199b | 1958 | struct dasd_ccw_req *init_cqr; |
1da177e4 | 1959 | |
1da177e4 LT |
1960 | status = private->init_cqr_status; |
1961 | private->init_cqr_status = -1; | |
eb6e199b SW |
1962 | if (status == INIT_CQR_ERROR) { |
1963 | /* try again, this time with full ERP */ | |
1964 | init_cqr = dasd_eckd_analysis_ccw(device); | |
1965 | dasd_sleep_on(init_cqr); | |
1966 | status = dasd_eckd_analysis_evaluation(init_cqr); | |
1967 | dasd_sfree_request(init_cqr, device); | |
1968 | } | |
1969 | ||
e4dbb0f2 SH |
1970 | if (device->features & DASD_FEATURE_USERAW) { |
1971 | block->bp_block = DASD_RAW_BLOCKSIZE; | |
1972 | blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; | |
1973 | block->s2b_shift = 3; | |
1974 | goto raw; | |
1975 | } | |
1976 | ||
eb6e199b SW |
1977 | if (status == INIT_CQR_UNFORMATTED) { |
1978 | dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); | |
1da177e4 | 1979 | return -EMEDIUMTYPE; |
eb6e199b SW |
1980 | } else if (status == INIT_CQR_ERROR) { |
1981 | dev_err(&device->cdev->dev, | |
1982 | "Detecting the DASD disk layout failed because " | |
1983 | "of an I/O error\n"); | |
1984 | return -EIO; | |
1da177e4 LT |
1985 | } |
1986 | ||
1987 | private->uses_cdl = 1; | |
1da177e4 LT |
1988 | /* Check Track 0 for Compatible Disk Layout */ |
1989 | count_area = NULL; | |
1990 | for (i = 0; i < 3; i++) { | |
1991 | if (private->count_area[i].kl != 4 || | |
3bc9fef9 SH |
1992 | private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 || |
1993 | private->count_area[i].cyl != 0 || | |
1994 | private->count_area[i].head != count_area_head[i] || | |
1995 | private->count_area[i].record != count_area_rec[i]) { | |
1da177e4 LT |
1996 | private->uses_cdl = 0; |
1997 | break; | |
1998 | } | |
1999 | } | |
2000 | if (i == 3) | |
2001 | count_area = &private->count_area[4]; | |
2002 | ||
2003 | if (private->uses_cdl == 0) { | |
2004 | for (i = 0; i < 5; i++) { | |
2005 | if ((private->count_area[i].kl != 0) || | |
2006 | (private->count_area[i].dl != | |
3bc9fef9 SH |
2007 | private->count_area[0].dl) || |
2008 | private->count_area[i].cyl != 0 || | |
2009 | private->count_area[i].head != count_area_head[i] || | |
2010 | private->count_area[i].record != count_area_rec[i]) | |
1da177e4 LT |
2011 | break; |
2012 | } | |
2013 | if (i == 5) | |
2014 | count_area = &private->count_area[0]; | |
2015 | } else { | |
2016 | if (private->count_area[3].record == 1) | |
fc19f381 SH |
2017 | dev_warn(&device->cdev->dev, |
2018 | "Track 0 has no records following the VTOC\n"); | |
1da177e4 | 2019 | } |
e4dbb0f2 | 2020 | |
1da177e4 LT |
2021 | if (count_area != NULL && count_area->kl == 0) { |
2022 | /* we found notthing violating our disk layout */ | |
2023 | if (dasd_check_blocksize(count_area->dl) == 0) | |
8e09f215 | 2024 | block->bp_block = count_area->dl; |
1da177e4 | 2025 | } |
8e09f215 | 2026 | if (block->bp_block == 0) { |
fc19f381 SH |
2027 | dev_warn(&device->cdev->dev, |
2028 | "The disk layout of the DASD is not supported\n"); | |
1da177e4 LT |
2029 | return -EMEDIUMTYPE; |
2030 | } | |
8e09f215 SW |
2031 | block->s2b_shift = 0; /* bits to shift 512 to get a block */ |
2032 | for (sb = 512; sb < block->bp_block; sb = sb << 1) | |
2033 | block->s2b_shift++; | |
1da177e4 | 2034 | |
8e09f215 | 2035 | blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); |
e4dbb0f2 SH |
2036 | |
2037 | raw: | |
b44b0ab3 | 2038 | block->blocks = (private->real_cyl * |
1da177e4 LT |
2039 | private->rdc_data.trk_per_cyl * |
2040 | blk_per_trk); | |
2041 | ||
fc19f381 SH |
2042 | dev_info(&device->cdev->dev, |
2043 | "DASD with %d KB/block, %d KB total size, %d KB/track, " | |
2044 | "%s\n", (block->bp_block >> 10), | |
2045 | ((private->real_cyl * | |
2046 | private->rdc_data.trk_per_cyl * | |
2047 | blk_per_trk * (block->bp_block >> 9)) >> 1), | |
2048 | ((blk_per_trk * block->bp_block) >> 10), | |
2049 | private->uses_cdl ? | |
2050 | "compatible disk layout" : "linux disk layout"); | |
1da177e4 LT |
2051 | |
2052 | return 0; | |
2053 | } | |
2054 | ||
8e09f215 | 2055 | static int dasd_eckd_do_analysis(struct dasd_block *block) |
1da177e4 | 2056 | { |
543691a4 | 2057 | struct dasd_eckd_private *private = block->base->private; |
1da177e4 | 2058 | |
1da177e4 | 2059 | if (private->init_cqr_status < 0) |
8e09f215 | 2060 | return dasd_eckd_start_analysis(block); |
1da177e4 | 2061 | else |
8e09f215 | 2062 | return dasd_eckd_end_analysis(block); |
1da177e4 LT |
2063 | } |
2064 | ||
d42e1712 | 2065 | static int dasd_eckd_basic_to_ready(struct dasd_device *device) |
8e09f215 SW |
2066 | { |
2067 | return dasd_alias_add_device(device); | |
2068 | }; | |
2069 | ||
2070 | static int dasd_eckd_online_to_ready(struct dasd_device *device) | |
2071 | { | |
501183f2 | 2072 | cancel_work_sync(&device->reload_device); |
25e2cf1c | 2073 | cancel_work_sync(&device->kick_validate); |
d42e1712 SH |
2074 | return 0; |
2075 | }; | |
2076 | ||
daa991bf | 2077 | static int dasd_eckd_basic_to_known(struct dasd_device *device) |
d42e1712 | 2078 | { |
8e09f215 SW |
2079 | return dasd_alias_remove_device(device); |
2080 | }; | |
2081 | ||
1da177e4 | 2082 | static int |
8e09f215 | 2083 | dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) |
1da177e4 | 2084 | { |
543691a4 | 2085 | struct dasd_eckd_private *private = block->base->private; |
1da177e4 | 2086 | |
8e09f215 | 2087 | if (dasd_check_blocksize(block->bp_block) == 0) { |
1da177e4 | 2088 | geo->sectors = recs_per_track(&private->rdc_data, |
8e09f215 | 2089 | 0, block->bp_block); |
1da177e4 LT |
2090 | } |
2091 | geo->cylinders = private->rdc_data.no_cyl; | |
2092 | geo->heads = private->rdc_data.trk_per_cyl; | |
2093 | return 0; | |
2094 | } | |
2095 | ||
2096 | static struct dasd_ccw_req * | |
d42e1712 | 2097 | dasd_eckd_build_format(struct dasd_device *base, |
29b8dd9d | 2098 | struct format_data_t *fdata, |
a94fa154 | 2099 | int enable_pav) |
1da177e4 | 2100 | { |
d42e1712 SH |
2101 | struct dasd_eckd_private *base_priv; |
2102 | struct dasd_eckd_private *start_priv; | |
29b8dd9d | 2103 | struct dasd_device *startdev = NULL; |
1da177e4 LT |
2104 | struct dasd_ccw_req *fcp; |
2105 | struct eckd_count *ect; | |
d42e1712 | 2106 | struct ch_t address; |
1da177e4 LT |
2107 | struct ccw1 *ccw; |
2108 | void *data; | |
b44b0ab3 | 2109 | int rpt; |
1da177e4 | 2110 | int cplength, datasize; |
d42e1712 | 2111 | int i, j; |
f9a28f7b JBJ |
2112 | int intensity = 0; |
2113 | int r0_perm; | |
d42e1712 | 2114 | int nr_tracks; |
18d6624e | 2115 | int use_prefix; |
1da177e4 | 2116 | |
a94fa154 | 2117 | if (enable_pav) |
29b8dd9d SH |
2118 | startdev = dasd_alias_get_start_dev(base); |
2119 | ||
d42e1712 SH |
2120 | if (!startdev) |
2121 | startdev = base; | |
1da177e4 | 2122 | |
543691a4 SO |
2123 | start_priv = startdev->private; |
2124 | base_priv = base->private; | |
d42e1712 SH |
2125 | |
2126 | rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize); | |
2127 | ||
2128 | nr_tracks = fdata->stop_unit - fdata->start_unit + 1; | |
1da177e4 LT |
2129 | |
2130 | /* | |
2131 | * fdata->intensity is a bit string that tells us what to do: | |
2132 | * Bit 0: write record zero | |
2133 | * Bit 1: write home address, currently not supported | |
2134 | * Bit 2: invalidate tracks | |
2135 | * Bit 3: use OS/390 compatible disk layout (cdl) | |
f9a28f7b | 2136 | * Bit 4: do not allow storage subsystem to modify record zero |
1da177e4 LT |
2137 | * Only some bit combinations do make sense. |
2138 | */ | |
f9a28f7b JBJ |
2139 | if (fdata->intensity & 0x10) { |
2140 | r0_perm = 0; | |
2141 | intensity = fdata->intensity & ~0x10; | |
2142 | } else { | |
2143 | r0_perm = 1; | |
2144 | intensity = fdata->intensity; | |
2145 | } | |
d42e1712 | 2146 | |
18d6624e SH |
2147 | use_prefix = base_priv->features.feature[8] & 0x01; |
2148 | ||
f9a28f7b | 2149 | switch (intensity) { |
1da177e4 LT |
2150 | case 0x00: /* Normal format */ |
2151 | case 0x08: /* Normal format, use cdl. */ | |
d42e1712 | 2152 | cplength = 2 + (rpt*nr_tracks); |
18d6624e SH |
2153 | if (use_prefix) |
2154 | datasize = sizeof(struct PFX_eckd_data) + | |
2155 | sizeof(struct LO_eckd_data) + | |
2156 | rpt * nr_tracks * sizeof(struct eckd_count); | |
2157 | else | |
2158 | datasize = sizeof(struct DE_eckd_data) + | |
2159 | sizeof(struct LO_eckd_data) + | |
2160 | rpt * nr_tracks * sizeof(struct eckd_count); | |
1da177e4 LT |
2161 | break; |
2162 | case 0x01: /* Write record zero and format track. */ | |
2163 | case 0x09: /* Write record zero and format track, use cdl. */ | |
d42e1712 | 2164 | cplength = 2 + rpt * nr_tracks; |
18d6624e SH |
2165 | if (use_prefix) |
2166 | datasize = sizeof(struct PFX_eckd_data) + | |
2167 | sizeof(struct LO_eckd_data) + | |
2168 | sizeof(struct eckd_count) + | |
2169 | rpt * nr_tracks * sizeof(struct eckd_count); | |
2170 | else | |
2171 | datasize = sizeof(struct DE_eckd_data) + | |
2172 | sizeof(struct LO_eckd_data) + | |
2173 | sizeof(struct eckd_count) + | |
2174 | rpt * nr_tracks * sizeof(struct eckd_count); | |
1da177e4 LT |
2175 | break; |
2176 | case 0x04: /* Invalidate track. */ | |
2177 | case 0x0c: /* Invalidate track, use cdl. */ | |
2178 | cplength = 3; | |
18d6624e SH |
2179 | if (use_prefix) |
2180 | datasize = sizeof(struct PFX_eckd_data) + | |
2181 | sizeof(struct LO_eckd_data) + | |
2182 | sizeof(struct eckd_count); | |
2183 | else | |
2184 | datasize = sizeof(struct DE_eckd_data) + | |
2185 | sizeof(struct LO_eckd_data) + | |
2186 | sizeof(struct eckd_count); | |
1da177e4 LT |
2187 | break; |
2188 | default: | |
d42e1712 SH |
2189 | dev_warn(&startdev->cdev->dev, |
2190 | "An I/O control call used incorrect flags 0x%x\n", | |
2191 | fdata->intensity); | |
1da177e4 LT |
2192 | return ERR_PTR(-EINVAL); |
2193 | } | |
2194 | /* Allocate the format ccw request. */ | |
d42e1712 SH |
2195 | fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, |
2196 | datasize, startdev); | |
1da177e4 LT |
2197 | if (IS_ERR(fcp)) |
2198 | return fcp; | |
2199 | ||
d42e1712 | 2200 | start_priv->count++; |
1da177e4 LT |
2201 | data = fcp->data; |
2202 | ccw = fcp->cpaddr; | |
2203 | ||
f9a28f7b | 2204 | switch (intensity & ~0x08) { |
1da177e4 | 2205 | case 0x00: /* Normal format. */ |
18d6624e SH |
2206 | if (use_prefix) { |
2207 | prefix(ccw++, (struct PFX_eckd_data *) data, | |
2208 | fdata->start_unit, fdata->stop_unit, | |
2209 | DASD_ECKD_CCW_WRITE_CKD, base, startdev); | |
2210 | /* grant subsystem permission to format R0 */ | |
2211 | if (r0_perm) | |
2212 | ((struct PFX_eckd_data *)data) | |
2213 | ->define_extent.ga_extended |= 0x04; | |
2214 | data += sizeof(struct PFX_eckd_data); | |
2215 | } else { | |
2216 | define_extent(ccw++, (struct DE_eckd_data *) data, | |
2217 | fdata->start_unit, fdata->stop_unit, | |
2218 | DASD_ECKD_CCW_WRITE_CKD, startdev); | |
2219 | /* grant subsystem permission to format R0 */ | |
2220 | if (r0_perm) | |
2221 | ((struct DE_eckd_data *) data) | |
2222 | ->ga_extended |= 0x04; | |
2223 | data += sizeof(struct DE_eckd_data); | |
2224 | } | |
1da177e4 LT |
2225 | ccw[-1].flags |= CCW_FLAG_CC; |
2226 | locate_record(ccw++, (struct LO_eckd_data *) data, | |
d42e1712 SH |
2227 | fdata->start_unit, 0, rpt*nr_tracks, |
2228 | DASD_ECKD_CCW_WRITE_CKD, base, | |
1da177e4 LT |
2229 | fdata->blksize); |
2230 | data += sizeof(struct LO_eckd_data); | |
2231 | break; | |
2232 | case 0x01: /* Write record zero + format track. */ | |
18d6624e SH |
2233 | if (use_prefix) { |
2234 | prefix(ccw++, (struct PFX_eckd_data *) data, | |
2235 | fdata->start_unit, fdata->stop_unit, | |
2236 | DASD_ECKD_CCW_WRITE_RECORD_ZERO, | |
2237 | base, startdev); | |
2238 | data += sizeof(struct PFX_eckd_data); | |
2239 | } else { | |
2240 | define_extent(ccw++, (struct DE_eckd_data *) data, | |
2241 | fdata->start_unit, fdata->stop_unit, | |
2242 | DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev); | |
2243 | data += sizeof(struct DE_eckd_data); | |
2244 | } | |
1da177e4 LT |
2245 | ccw[-1].flags |= CCW_FLAG_CC; |
2246 | locate_record(ccw++, (struct LO_eckd_data *) data, | |
d42e1712 SH |
2247 | fdata->start_unit, 0, rpt * nr_tracks + 1, |
2248 | DASD_ECKD_CCW_WRITE_RECORD_ZERO, base, | |
2249 | base->block->bp_block); | |
1da177e4 LT |
2250 | data += sizeof(struct LO_eckd_data); |
2251 | break; | |
2252 | case 0x04: /* Invalidate track. */ | |
18d6624e SH |
2253 | if (use_prefix) { |
2254 | prefix(ccw++, (struct PFX_eckd_data *) data, | |
2255 | fdata->start_unit, fdata->stop_unit, | |
2256 | DASD_ECKD_CCW_WRITE_CKD, base, startdev); | |
2257 | data += sizeof(struct PFX_eckd_data); | |
2258 | } else { | |
2259 | define_extent(ccw++, (struct DE_eckd_data *) data, | |
2260 | fdata->start_unit, fdata->stop_unit, | |
2261 | DASD_ECKD_CCW_WRITE_CKD, startdev); | |
2262 | data += sizeof(struct DE_eckd_data); | |
2263 | } | |
1da177e4 LT |
2264 | ccw[-1].flags |= CCW_FLAG_CC; |
2265 | locate_record(ccw++, (struct LO_eckd_data *) data, | |
2266 | fdata->start_unit, 0, 1, | |
d42e1712 | 2267 | DASD_ECKD_CCW_WRITE_CKD, base, 8); |
1da177e4 LT |
2268 | data += sizeof(struct LO_eckd_data); |
2269 | break; | |
2270 | } | |
d42e1712 SH |
2271 | |
2272 | for (j = 0; j < nr_tracks; j++) { | |
2273 | /* calculate cylinder and head for the current track */ | |
2274 | set_ch_t(&address, | |
2275 | (fdata->start_unit + j) / | |
2276 | base_priv->rdc_data.trk_per_cyl, | |
2277 | (fdata->start_unit + j) % | |
2278 | base_priv->rdc_data.trk_per_cyl); | |
2279 | if (intensity & 0x01) { /* write record zero */ | |
1da177e4 LT |
2280 | ect = (struct eckd_count *) data; |
2281 | data += sizeof(struct eckd_count); | |
b44b0ab3 SW |
2282 | ect->cyl = address.cyl; |
2283 | ect->head = address.head; | |
d42e1712 | 2284 | ect->record = 0; |
1da177e4 | 2285 | ect->kl = 0; |
d42e1712 | 2286 | ect->dl = 8; |
1da177e4 | 2287 | ccw[-1].flags |= CCW_FLAG_CC; |
d42e1712 | 2288 | ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; |
1da177e4 LT |
2289 | ccw->flags = CCW_FLAG_SLI; |
2290 | ccw->count = 8; | |
2291 | ccw->cda = (__u32)(addr_t) ect; | |
2292 | ccw++; | |
2293 | } | |
d42e1712 SH |
2294 | if ((intensity & ~0x08) & 0x04) { /* erase track */ |
2295 | ect = (struct eckd_count *) data; | |
2296 | data += sizeof(struct eckd_count); | |
2297 | ect->cyl = address.cyl; | |
2298 | ect->head = address.head; | |
2299 | ect->record = 1; | |
2300 | ect->kl = 0; | |
2301 | ect->dl = 0; | |
2302 | ccw[-1].flags |= CCW_FLAG_CC; | |
2303 | ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; | |
2304 | ccw->flags = CCW_FLAG_SLI; | |
2305 | ccw->count = 8; | |
2306 | ccw->cda = (__u32)(addr_t) ect; | |
2307 | } else { /* write remaining records */ | |
2308 | for (i = 0; i < rpt; i++) { | |
2309 | ect = (struct eckd_count *) data; | |
2310 | data += sizeof(struct eckd_count); | |
2311 | ect->cyl = address.cyl; | |
2312 | ect->head = address.head; | |
2313 | ect->record = i + 1; | |
2314 | ect->kl = 0; | |
2315 | ect->dl = fdata->blksize; | |
2316 | /* | |
2317 | * Check for special tracks 0-1 | |
2318 | * when formatting CDL | |
2319 | */ | |
2320 | if ((intensity & 0x08) && | |
46d1c03c | 2321 | address.cyl == 0 && address.head == 0) { |
d42e1712 SH |
2322 | if (i < 3) { |
2323 | ect->kl = 4; | |
2324 | ect->dl = sizes_trk0[i] - 4; | |
2325 | } | |
2326 | } | |
2327 | if ((intensity & 0x08) && | |
46d1c03c | 2328 | address.cyl == 0 && address.head == 1) { |
d42e1712 SH |
2329 | ect->kl = 44; |
2330 | ect->dl = LABEL_SIZE - 44; | |
2331 | } | |
2332 | ccw[-1].flags |= CCW_FLAG_CC; | |
2333 | if (i != 0 || j == 0) | |
2334 | ccw->cmd_code = | |
2335 | DASD_ECKD_CCW_WRITE_CKD; | |
2336 | else | |
2337 | ccw->cmd_code = | |
2338 | DASD_ECKD_CCW_WRITE_CKD_MT; | |
2339 | ccw->flags = CCW_FLAG_SLI; | |
2340 | ccw->count = 8; | |
2341 | ccw->cda = (__u32)(addr_t) ect; | |
2342 | ccw++; | |
2343 | } | |
2344 | } | |
1da177e4 | 2345 | } |
d42e1712 SH |
2346 | |
2347 | fcp->startdev = startdev; | |
2348 | fcp->memdev = startdev; | |
29b8dd9d | 2349 | fcp->basedev = base; |
eb6e199b | 2350 | fcp->retries = 256; |
d42e1712 | 2351 | fcp->expires = startdev->default_expires * HZ; |
1aae0560 | 2352 | fcp->buildclk = get_tod_clock(); |
1da177e4 | 2353 | fcp->status = DASD_CQR_FILLED; |
d42e1712 | 2354 | |
1da177e4 LT |
2355 | return fcp; |
2356 | } | |
2357 | ||
570d237c JH |
2358 | /* |
2359 | * Wrapper function to build a CCW request depending on input data | |
2360 | */ | |
2361 | static struct dasd_ccw_req * | |
2362 | dasd_eckd_format_build_ccw_req(struct dasd_device *base, | |
2363 | struct format_data_t *fdata, int enable_pav) | |
2364 | { | |
2365 | return dasd_eckd_build_format(base, fdata, enable_pav); | |
2366 | } | |
2367 | ||
2368 | /* | |
2369 | * Sanity checks on format_data | |
2370 | */ | |
2371 | static int dasd_eckd_format_sanity_checks(struct dasd_device *base, | |
2372 | struct format_data_t *fdata) | |
d42e1712 | 2373 | { |
543691a4 | 2374 | struct dasd_eckd_private *private = base->private; |
d42e1712 | 2375 | |
d42e1712 SH |
2376 | if (fdata->start_unit >= |
2377 | (private->real_cyl * private->rdc_data.trk_per_cyl)) { | |
2378 | dev_warn(&base->cdev->dev, | |
2379 | "Start track number %u used in formatting is too big\n", | |
2380 | fdata->start_unit); | |
2381 | return -EINVAL; | |
2382 | } | |
2383 | if (fdata->stop_unit >= | |
2384 | (private->real_cyl * private->rdc_data.trk_per_cyl)) { | |
2385 | dev_warn(&base->cdev->dev, | |
2386 | "Stop track number %u used in formatting is too big\n", | |
2387 | fdata->stop_unit); | |
2388 | return -EINVAL; | |
2389 | } | |
2390 | if (fdata->start_unit > fdata->stop_unit) { | |
2391 | dev_warn(&base->cdev->dev, | |
2392 | "Start track %u used in formatting exceeds end track\n", | |
2393 | fdata->start_unit); | |
2394 | return -EINVAL; | |
2395 | } | |
2396 | if (dasd_check_blocksize(fdata->blksize) != 0) { | |
2397 | dev_warn(&base->cdev->dev, | |
2398 | "The DASD cannot be formatted with block size %u\n", | |
2399 | fdata->blksize); | |
2400 | return -EINVAL; | |
2401 | } | |
570d237c JH |
2402 | return 0; |
2403 | } | |
2404 | ||
2405 | /* | |
2406 | * This function will process format_data originally coming from an IOCTL | |
2407 | */ | |
2408 | static int dasd_eckd_format_process_data(struct dasd_device *base, | |
2409 | struct format_data_t *fdata, | |
2410 | int enable_pav) | |
2411 | { | |
543691a4 | 2412 | struct dasd_eckd_private *private = base->private; |
570d237c | 2413 | struct dasd_ccw_req *cqr, *n; |
570d237c JH |
2414 | struct list_head format_queue; |
2415 | struct dasd_device *device; | |
2416 | int old_start, old_stop, format_step; | |
2417 | int step, retry; | |
2418 | int rc; | |
2419 | ||
570d237c JH |
2420 | rc = dasd_eckd_format_sanity_checks(base, fdata); |
2421 | if (rc) | |
2422 | return rc; | |
d42e1712 SH |
2423 | |
2424 | INIT_LIST_HEAD(&format_queue); | |
d42e1712 | 2425 | |
46d1c03c | 2426 | old_start = fdata->start_unit; |
29b8dd9d | 2427 | old_stop = fdata->stop_unit; |
d42e1712 | 2428 | |
46d1c03c JH |
2429 | format_step = DASD_CQR_MAX_CCW / recs_per_track(&private->rdc_data, 0, |
2430 | fdata->blksize); | |
2431 | do { | |
2432 | retry = 0; | |
2433 | while (fdata->start_unit <= old_stop) { | |
2434 | step = fdata->stop_unit - fdata->start_unit + 1; | |
2435 | if (step > format_step) { | |
2436 | fdata->stop_unit = | |
2437 | fdata->start_unit + format_step - 1; | |
2438 | } | |
d42e1712 | 2439 | |
570d237c JH |
2440 | cqr = dasd_eckd_format_build_ccw_req(base, fdata, |
2441 | enable_pav); | |
46d1c03c JH |
2442 | if (IS_ERR(cqr)) { |
2443 | rc = PTR_ERR(cqr); | |
2444 | if (rc == -ENOMEM) { | |
2445 | if (list_empty(&format_queue)) | |
2446 | goto out; | |
2447 | /* | |
2448 | * not enough memory available, start | |
2449 | * requests retry after first requests | |
2450 | * were finished | |
2451 | */ | |
2452 | retry = 1; | |
2453 | break; | |
2454 | } | |
2455 | goto out_err; | |
2456 | } | |
2457 | list_add_tail(&cqr->blocklist, &format_queue); | |
d42e1712 | 2458 | |
46d1c03c JH |
2459 | fdata->start_unit = fdata->stop_unit + 1; |
2460 | fdata->stop_unit = old_stop; | |
d42e1712 | 2461 | } |
d42e1712 | 2462 | |
46d1c03c JH |
2463 | rc = dasd_sleep_on_queue(&format_queue); |
2464 | ||
2465 | out_err: | |
2466 | list_for_each_entry_safe(cqr, n, &format_queue, blocklist) { | |
2467 | device = cqr->startdev; | |
543691a4 | 2468 | private = device->private; |
46d1c03c JH |
2469 | if (cqr->status == DASD_CQR_FAILED) |
2470 | rc = -EIO; | |
2471 | list_del_init(&cqr->blocklist); | |
2472 | dasd_sfree_request(cqr, device); | |
2473 | private->count--; | |
2474 | } | |
d42e1712 | 2475 | |
46d1c03c JH |
2476 | if (rc) |
2477 | goto out; | |
d42e1712 | 2478 | |
46d1c03c | 2479 | } while (retry); |
29b8dd9d | 2480 | |
46d1c03c JH |
2481 | out: |
2482 | fdata->start_unit = old_start; | |
2483 | fdata->stop_unit = old_stop; | |
d42e1712 SH |
2484 | |
2485 | return rc; | |
2486 | } | |
2487 | ||
570d237c JH |
2488 | static int dasd_eckd_format_device(struct dasd_device *base, |
2489 | struct format_data_t *fdata, int enable_pav) | |
2490 | { | |
2491 | return dasd_eckd_format_process_data(base, fdata, enable_pav); | |
2492 | } | |
2493 | ||
8e09f215 | 2494 | static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) |
1da177e4 | 2495 | { |
a2ace466 HR |
2496 | if (cqr->retries < 0) { |
2497 | cqr->status = DASD_CQR_FAILED; | |
2498 | return; | |
2499 | } | |
8e09f215 SW |
2500 | cqr->status = DASD_CQR_FILLED; |
2501 | if (cqr->block && (cqr->startdev != cqr->block->base)) { | |
2502 | dasd_eckd_reset_ccw_to_base_io(cqr); | |
2503 | cqr->startdev = cqr->block->base; | |
a4d26c6a | 2504 | cqr->lpm = cqr->block->base->path_data.opm; |
1da177e4 | 2505 | } |
8e09f215 | 2506 | }; |
1da177e4 LT |
2507 | |
2508 | static dasd_erp_fn_t | |
2509 | dasd_eckd_erp_action(struct dasd_ccw_req * cqr) | |
2510 | { | |
8e09f215 | 2511 | struct dasd_device *device = (struct dasd_device *) cqr->startdev; |
1da177e4 LT |
2512 | struct ccw_device *cdev = device->cdev; |
2513 | ||
2514 | switch (cdev->id.cu_type) { | |
2515 | case 0x3990: | |
2516 | case 0x2105: | |
2517 | case 0x2107: | |
2518 | case 0x1750: | |
2519 | return dasd_3990_erp_action; | |
2520 | case 0x9343: | |
2521 | case 0x3880: | |
2522 | default: | |
2523 | return dasd_default_erp_action; | |
2524 | } | |
2525 | } | |
2526 | ||
2527 | static dasd_erp_fn_t | |
2528 | dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) | |
2529 | { | |
2530 | return dasd_default_erp_postaction; | |
2531 | } | |
2532 | ||
5a27e60d SW |
2533 | static void dasd_eckd_check_for_device_change(struct dasd_device *device, |
2534 | struct dasd_ccw_req *cqr, | |
2535 | struct irb *irb) | |
8e09f215 SW |
2536 | { |
2537 | char mask; | |
f3eb5384 | 2538 | char *sense = NULL; |
543691a4 | 2539 | struct dasd_eckd_private *private = device->private; |
8e09f215 SW |
2540 | |
2541 | /* first of all check for state change pending interrupt */ | |
2542 | mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; | |
f3eb5384 | 2543 | if ((scsw_dstat(&irb->scsw) & mask) == mask) { |
c8d1c0ff SH |
2544 | /* |
2545 | * for alias only, not in offline processing | |
2546 | * and only if not suspended | |
2547 | */ | |
501183f2 | 2548 | if (!device->block && private->lcu && |
25e2cf1c | 2549 | device->state == DASD_STATE_ONLINE && |
c8d1c0ff SH |
2550 | !test_bit(DASD_FLAG_OFFLINE, &device->flags) && |
2551 | !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { | |
501183f2 SH |
2552 | /* |
2553 | * the state change could be caused by an alias | |
2554 | * reassignment remove device from alias handling | |
2555 | * to prevent new requests from being scheduled on | |
2556 | * the wrong alias device | |
2557 | */ | |
2558 | dasd_alias_remove_device(device); | |
2559 | ||
2560 | /* schedule worker to reload device */ | |
2561 | dasd_reload_device(device); | |
2562 | } | |
8e09f215 SW |
2563 | dasd_generic_handle_state_change(device); |
2564 | return; | |
2565 | } | |
2566 | ||
a5a0061f | 2567 | sense = dasd_get_sense(irb); |
5a27e60d SW |
2568 | if (!sense) |
2569 | return; | |
2570 | ||
2571 | /* summary unit check */ | |
c7a29e56 | 2572 | if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && |
a5a0061f | 2573 | (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { |
8e09f215 SW |
2574 | dasd_alias_handle_summary_unit_check(device, irb); |
2575 | return; | |
2576 | } | |
2577 | ||
f60c768c | 2578 | /* service information message SIM */ |
5a27e60d | 2579 | if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && |
f3eb5384 SW |
2580 | ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { |
2581 | dasd_3990_erp_handle_sim(device, sense); | |
f60c768c SH |
2582 | return; |
2583 | } | |
2584 | ||
5a27e60d SW |
2585 | /* loss of device reservation is handled via base devices only |
2586 | * as alias devices may be used with several bases | |
2587 | */ | |
c7a29e56 SW |
2588 | if (device->block && (sense[27] & DASD_SENSE_BIT_0) && |
2589 | (sense[7] == 0x3F) && | |
5a27e60d SW |
2590 | (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && |
2591 | test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { | |
2592 | if (device->features & DASD_FEATURE_FAILONSLCK) | |
2593 | set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); | |
2594 | clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); | |
2595 | dev_err(&device->cdev->dev, | |
2596 | "The device reservation was lost\n"); | |
ada3df91 | 2597 | } |
5a27e60d | 2598 | } |
f3eb5384 SW |
2599 | |
2600 | static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( | |
2601 | struct dasd_device *startdev, | |
8e09f215 | 2602 | struct dasd_block *block, |
f3eb5384 SW |
2603 | struct request *req, |
2604 | sector_t first_rec, | |
2605 | sector_t last_rec, | |
2606 | sector_t first_trk, | |
2607 | sector_t last_trk, | |
2608 | unsigned int first_offs, | |
2609 | unsigned int last_offs, | |
2610 | unsigned int blk_per_trk, | |
2611 | unsigned int blksize) | |
1da177e4 LT |
2612 | { |
2613 | struct dasd_eckd_private *private; | |
2614 | unsigned long *idaws; | |
2615 | struct LO_eckd_data *LO_data; | |
2616 | struct dasd_ccw_req *cqr; | |
2617 | struct ccw1 *ccw; | |
5705f702 | 2618 | struct req_iterator iter; |
7988613b | 2619 | struct bio_vec bv; |
1da177e4 | 2620 | char *dst; |
f3eb5384 | 2621 | unsigned int off; |
1da177e4 | 2622 | int count, cidaw, cplength, datasize; |
f3eb5384 | 2623 | sector_t recid; |
1da177e4 | 2624 | unsigned char cmd, rcmd; |
8e09f215 SW |
2625 | int use_prefix; |
2626 | struct dasd_device *basedev; | |
1da177e4 | 2627 | |
8e09f215 | 2628 | basedev = block->base; |
543691a4 | 2629 | private = basedev->private; |
1da177e4 LT |
2630 | if (rq_data_dir(req) == READ) |
2631 | cmd = DASD_ECKD_CCW_READ_MT; | |
2632 | else if (rq_data_dir(req) == WRITE) | |
2633 | cmd = DASD_ECKD_CCW_WRITE_MT; | |
2634 | else | |
2635 | return ERR_PTR(-EINVAL); | |
f3eb5384 | 2636 | |
1da177e4 LT |
2637 | /* Check struct bio and count the number of blocks for the request. */ |
2638 | count = 0; | |
2639 | cidaw = 0; | |
5705f702 | 2640 | rq_for_each_segment(bv, req, iter) { |
7988613b | 2641 | if (bv.bv_len & (blksize - 1)) |
6c92e699 JA |
2642 | /* Eckd can only do full blocks. */ |
2643 | return ERR_PTR(-EINVAL); | |
7988613b | 2644 | count += bv.bv_len >> (block->s2b_shift + 9); |
7988613b KO |
2645 | if (idal_is_needed (page_address(bv.bv_page), bv.bv_len)) |
2646 | cidaw += bv.bv_len >> (block->s2b_shift + 9); | |
1da177e4 LT |
2647 | } |
2648 | /* Paranoia. */ | |
2649 | if (count != last_rec - first_rec + 1) | |
2650 | return ERR_PTR(-EINVAL); | |
8e09f215 SW |
2651 | |
2652 | /* use the prefix command if available */ | |
2653 | use_prefix = private->features.feature[8] & 0x01; | |
2654 | if (use_prefix) { | |
2655 | /* 1x prefix + number of blocks */ | |
2656 | cplength = 2 + count; | |
2657 | /* 1x prefix + cidaws*sizeof(long) */ | |
2658 | datasize = sizeof(struct PFX_eckd_data) + | |
2659 | sizeof(struct LO_eckd_data) + | |
2660 | cidaw * sizeof(unsigned long); | |
2661 | } else { | |
2662 | /* 1x define extent + 1x locate record + number of blocks */ | |
2663 | cplength = 2 + count; | |
2664 | /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ | |
2665 | datasize = sizeof(struct DE_eckd_data) + | |
2666 | sizeof(struct LO_eckd_data) + | |
2667 | cidaw * sizeof(unsigned long); | |
2668 | } | |
1da177e4 LT |
2669 | /* Find out the number of additional locate record ccws for cdl. */ |
2670 | if (private->uses_cdl && first_rec < 2*blk_per_trk) { | |
2671 | if (last_rec >= 2*blk_per_trk) | |
2672 | count = 2*blk_per_trk - first_rec; | |
2673 | cplength += count; | |
2674 | datasize += count*sizeof(struct LO_eckd_data); | |
2675 | } | |
2676 | /* Allocate the ccw request. */ | |
68b781fe SH |
2677 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, |
2678 | startdev); | |
1da177e4 LT |
2679 | if (IS_ERR(cqr)) |
2680 | return cqr; | |
2681 | ccw = cqr->cpaddr; | |
8e09f215 SW |
2682 | /* First ccw is define extent or prefix. */ |
2683 | if (use_prefix) { | |
2684 | if (prefix(ccw++, cqr->data, first_trk, | |
2685 | last_trk, cmd, basedev, startdev) == -EAGAIN) { | |
2686 | /* Clock not in sync and XRC is enabled. | |
2687 | * Try again later. | |
2688 | */ | |
2689 | dasd_sfree_request(cqr, startdev); | |
2690 | return ERR_PTR(-EAGAIN); | |
2691 | } | |
2692 | idaws = (unsigned long *) (cqr->data + | |
2693 | sizeof(struct PFX_eckd_data)); | |
2694 | } else { | |
2695 | if (define_extent(ccw++, cqr->data, first_trk, | |
b38f27e8 | 2696 | last_trk, cmd, basedev) == -EAGAIN) { |
8e09f215 SW |
2697 | /* Clock not in sync and XRC is enabled. |
2698 | * Try again later. | |
2699 | */ | |
2700 | dasd_sfree_request(cqr, startdev); | |
2701 | return ERR_PTR(-EAGAIN); | |
2702 | } | |
2703 | idaws = (unsigned long *) (cqr->data + | |
2704 | sizeof(struct DE_eckd_data)); | |
d54853ef | 2705 | } |
1da177e4 | 2706 | /* Build locate_record+read/write/ccws. */ |
1da177e4 LT |
2707 | LO_data = (struct LO_eckd_data *) (idaws + cidaw); |
2708 | recid = first_rec; | |
2709 | if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { | |
2710 | /* Only standard blocks so there is just one locate record. */ | |
2711 | ccw[-1].flags |= CCW_FLAG_CC; | |
2712 | locate_record(ccw++, LO_data++, first_trk, first_offs + 1, | |
8e09f215 | 2713 | last_rec - recid + 1, cmd, basedev, blksize); |
1da177e4 | 2714 | } |
5705f702 | 2715 | rq_for_each_segment(bv, req, iter) { |
7988613b | 2716 | dst = page_address(bv.bv_page) + bv.bv_offset; |
1da177e4 LT |
2717 | if (dasd_page_cache) { |
2718 | char *copy = kmem_cache_alloc(dasd_page_cache, | |
441e143e | 2719 | GFP_DMA | __GFP_NOWARN); |
1da177e4 | 2720 | if (copy && rq_data_dir(req) == WRITE) |
7988613b | 2721 | memcpy(copy + bv.bv_offset, dst, bv.bv_len); |
1da177e4 | 2722 | if (copy) |
7988613b | 2723 | dst = copy + bv.bv_offset; |
1da177e4 | 2724 | } |
7988613b | 2725 | for (off = 0; off < bv.bv_len; off += blksize) { |
1da177e4 LT |
2726 | sector_t trkid = recid; |
2727 | unsigned int recoffs = sector_div(trkid, blk_per_trk); | |
2728 | rcmd = cmd; | |
2729 | count = blksize; | |
2730 | /* Locate record for cdl special block ? */ | |
2731 | if (private->uses_cdl && recid < 2*blk_per_trk) { | |
2732 | if (dasd_eckd_cdl_special(blk_per_trk, recid)){ | |
2733 | rcmd |= 0x8; | |
2734 | count = dasd_eckd_cdl_reclen(recid); | |
ec5883ab HH |
2735 | if (count < blksize && |
2736 | rq_data_dir(req) == READ) | |
1da177e4 LT |
2737 | memset(dst + count, 0xe5, |
2738 | blksize - count); | |
2739 | } | |
2740 | ccw[-1].flags |= CCW_FLAG_CC; | |
2741 | locate_record(ccw++, LO_data++, | |
2742 | trkid, recoffs + 1, | |
8e09f215 | 2743 | 1, rcmd, basedev, count); |
1da177e4 LT |
2744 | } |
2745 | /* Locate record for standard blocks ? */ | |
2746 | if (private->uses_cdl && recid == 2*blk_per_trk) { | |
2747 | ccw[-1].flags |= CCW_FLAG_CC; | |
2748 | locate_record(ccw++, LO_data++, | |
2749 | trkid, recoffs + 1, | |
2750 | last_rec - recid + 1, | |
8e09f215 | 2751 | cmd, basedev, count); |
1da177e4 LT |
2752 | } |
2753 | /* Read/write ccw. */ | |
2754 | ccw[-1].flags |= CCW_FLAG_CC; | |
2755 | ccw->cmd_code = rcmd; | |
2756 | ccw->count = count; | |
2757 | if (idal_is_needed(dst, blksize)) { | |
2758 | ccw->cda = (__u32)(addr_t) idaws; | |
2759 | ccw->flags = CCW_FLAG_IDA; | |
2760 | idaws = idal_create_words(idaws, dst, blksize); | |
2761 | } else { | |
2762 | ccw->cda = (__u32)(addr_t) dst; | |
2763 | ccw->flags = 0; | |
2764 | } | |
2765 | ccw++; | |
2766 | dst += blksize; | |
2767 | recid++; | |
2768 | } | |
2769 | } | |
13de227b HS |
2770 | if (blk_noretry_request(req) || |
2771 | block->base->features & DASD_FEATURE_FAILFAST) | |
1c01b8a5 | 2772 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
8e09f215 SW |
2773 | cqr->startdev = startdev; |
2774 | cqr->memdev = startdev; | |
2775 | cqr->block = block; | |
7c8faa86 | 2776 | cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ |
a4d26c6a | 2777 | cqr->lpm = startdev->path_data.ppm; |
1f1ee9ad | 2778 | cqr->retries = startdev->default_retries; |
1aae0560 | 2779 | cqr->buildclk = get_tod_clock(); |
1da177e4 LT |
2780 | cqr->status = DASD_CQR_FILLED; |
2781 | return cqr; | |
2782 | } | |
2783 | ||
f3eb5384 SW |
2784 | static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( |
2785 | struct dasd_device *startdev, | |
2786 | struct dasd_block *block, | |
2787 | struct request *req, | |
2788 | sector_t first_rec, | |
2789 | sector_t last_rec, | |
2790 | sector_t first_trk, | |
2791 | sector_t last_trk, | |
2792 | unsigned int first_offs, | |
2793 | unsigned int last_offs, | |
2794 | unsigned int blk_per_trk, | |
2795 | unsigned int blksize) | |
2796 | { | |
f3eb5384 SW |
2797 | unsigned long *idaws; |
2798 | struct dasd_ccw_req *cqr; | |
2799 | struct ccw1 *ccw; | |
2800 | struct req_iterator iter; | |
7988613b | 2801 | struct bio_vec bv; |
f3eb5384 SW |
2802 | char *dst, *idaw_dst; |
2803 | unsigned int cidaw, cplength, datasize; | |
2804 | unsigned int tlf; | |
2805 | sector_t recid; | |
2806 | unsigned char cmd; | |
2807 | struct dasd_device *basedev; | |
2808 | unsigned int trkcount, count, count_to_trk_end; | |
2809 | unsigned int idaw_len, seg_len, part_len, len_to_track_end; | |
2810 | unsigned char new_track, end_idaw; | |
2811 | sector_t trkid; | |
2812 | unsigned int recoffs; | |
2813 | ||
2814 | basedev = block->base; | |
f3eb5384 SW |
2815 | if (rq_data_dir(req) == READ) |
2816 | cmd = DASD_ECKD_CCW_READ_TRACK_DATA; | |
2817 | else if (rq_data_dir(req) == WRITE) | |
2818 | cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; | |
2819 | else | |
2820 | return ERR_PTR(-EINVAL); | |
2821 | ||
2822 | /* Track based I/O needs IDAWs for each page, and not just for | |
2823 | * 64 bit addresses. We need additional idals for pages | |
2824 | * that get filled from two tracks, so we use the number | |
2825 | * of records as upper limit. | |
2826 | */ | |
2827 | cidaw = last_rec - first_rec + 1; | |
2828 | trkcount = last_trk - first_trk + 1; | |
2829 | ||
2830 | /* 1x prefix + one read/write ccw per track */ | |
2831 | cplength = 1 + trkcount; | |
2832 | ||
2833 | /* on 31-bit we need space for two 32 bit addresses per page | |
2834 | * on 64-bit one 64 bit address | |
2835 | */ | |
2836 | datasize = sizeof(struct PFX_eckd_data) + | |
2837 | cidaw * sizeof(unsigned long long); | |
2838 | ||
2839 | /* Allocate the ccw request. */ | |
68b781fe SH |
2840 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, |
2841 | startdev); | |
f3eb5384 SW |
2842 | if (IS_ERR(cqr)) |
2843 | return cqr; | |
2844 | ccw = cqr->cpaddr; | |
2845 | /* transfer length factor: how many bytes to read from the last track */ | |
2846 | if (first_trk == last_trk) | |
2847 | tlf = last_offs - first_offs + 1; | |
2848 | else | |
2849 | tlf = last_offs + 1; | |
2850 | tlf *= blksize; | |
2851 | ||
2852 | if (prefix_LRE(ccw++, cqr->data, first_trk, | |
2853 | last_trk, cmd, basedev, startdev, | |
2854 | 1 /* format */, first_offs + 1, | |
2855 | trkcount, blksize, | |
2856 | tlf) == -EAGAIN) { | |
2857 | /* Clock not in sync and XRC is enabled. | |
2858 | * Try again later. | |
2859 | */ | |
2860 | dasd_sfree_request(cqr, startdev); | |
2861 | return ERR_PTR(-EAGAIN); | |
2862 | } | |
2863 | ||
2864 | /* | |
2865 | * The translation of request into ccw programs must meet the | |
2866 | * following conditions: | |
2867 | * - all idaws but the first and the last must address full pages | |
2868 | * (or 2K blocks on 31-bit) | |
2869 | * - the scope of a ccw and it's idal ends with the track boundaries | |
2870 | */ | |
2871 | idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); | |
2872 | recid = first_rec; | |
2873 | new_track = 1; | |
2874 | end_idaw = 0; | |
2875 | len_to_track_end = 0; | |
246ccea1 | 2876 | idaw_dst = NULL; |
f3eb5384 SW |
2877 | idaw_len = 0; |
2878 | rq_for_each_segment(bv, req, iter) { | |
7988613b KO |
2879 | dst = page_address(bv.bv_page) + bv.bv_offset; |
2880 | seg_len = bv.bv_len; | |
f3eb5384 SW |
2881 | while (seg_len) { |
2882 | if (new_track) { | |
2883 | trkid = recid; | |
2884 | recoffs = sector_div(trkid, blk_per_trk); | |
2885 | count_to_trk_end = blk_per_trk - recoffs; | |
2886 | count = min((last_rec - recid + 1), | |
2887 | (sector_t)count_to_trk_end); | |
2888 | len_to_track_end = count * blksize; | |
2889 | ccw[-1].flags |= CCW_FLAG_CC; | |
2890 | ccw->cmd_code = cmd; | |
2891 | ccw->count = len_to_track_end; | |
2892 | ccw->cda = (__u32)(addr_t)idaws; | |
2893 | ccw->flags = CCW_FLAG_IDA; | |
2894 | ccw++; | |
2895 | recid += count; | |
2896 | new_track = 0; | |
52db45c3 SW |
2897 | /* first idaw for a ccw may start anywhere */ |
2898 | if (!idaw_dst) | |
2899 | idaw_dst = dst; | |
f3eb5384 | 2900 | } |
52db45c3 SW |
2901 | /* If we start a new idaw, we must make sure that it |
2902 | * starts on an IDA_BLOCK_SIZE boundary. | |
f3eb5384 SW |
2903 | * If we continue an idaw, we must make sure that the |
2904 | * current segment begins where the so far accumulated | |
2905 | * idaw ends | |
2906 | */ | |
52db45c3 SW |
2907 | if (!idaw_dst) { |
2908 | if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { | |
2909 | dasd_sfree_request(cqr, startdev); | |
2910 | return ERR_PTR(-ERANGE); | |
2911 | } else | |
2912 | idaw_dst = dst; | |
2913 | } | |
f3eb5384 SW |
2914 | if ((idaw_dst + idaw_len) != dst) { |
2915 | dasd_sfree_request(cqr, startdev); | |
2916 | return ERR_PTR(-ERANGE); | |
2917 | } | |
2918 | part_len = min(seg_len, len_to_track_end); | |
2919 | seg_len -= part_len; | |
2920 | dst += part_len; | |
2921 | idaw_len += part_len; | |
2922 | len_to_track_end -= part_len; | |
2923 | /* collected memory area ends on an IDA_BLOCK border, | |
2924 | * -> create an idaw | |
2925 | * idal_create_words will handle cases where idaw_len | |
2926 | * is larger then IDA_BLOCK_SIZE | |
2927 | */ | |
2928 | if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) | |
2929 | end_idaw = 1; | |
2930 | /* We also need to end the idaw at track end */ | |
2931 | if (!len_to_track_end) { | |
2932 | new_track = 1; | |
2933 | end_idaw = 1; | |
2934 | } | |
2935 | if (end_idaw) { | |
2936 | idaws = idal_create_words(idaws, idaw_dst, | |
2937 | idaw_len); | |
246ccea1 | 2938 | idaw_dst = NULL; |
f3eb5384 SW |
2939 | idaw_len = 0; |
2940 | end_idaw = 0; | |
2941 | } | |
2942 | } | |
2943 | } | |
2944 | ||
2945 | if (blk_noretry_request(req) || | |
2946 | block->base->features & DASD_FEATURE_FAILFAST) | |
2947 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); | |
2948 | cqr->startdev = startdev; | |
2949 | cqr->memdev = startdev; | |
2950 | cqr->block = block; | |
7c8faa86 | 2951 | cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ |
a4d26c6a | 2952 | cqr->lpm = startdev->path_data.ppm; |
1f1ee9ad | 2953 | cqr->retries = startdev->default_retries; |
1aae0560 | 2954 | cqr->buildclk = get_tod_clock(); |
f3eb5384 SW |
2955 | cqr->status = DASD_CQR_FILLED; |
2956 | return cqr; | |
2957 | } | |
2958 | ||
2959 | static int prepare_itcw(struct itcw *itcw, | |
2960 | unsigned int trk, unsigned int totrk, int cmd, | |
2961 | struct dasd_device *basedev, | |
2962 | struct dasd_device *startdev, | |
2963 | unsigned int rec_on_trk, int count, | |
2964 | unsigned int blksize, | |
2965 | unsigned int total_data_size, | |
2966 | unsigned int tlf, | |
2967 | unsigned int blk_per_trk) | |
2968 | { | |
2969 | struct PFX_eckd_data pfxdata; | |
2970 | struct dasd_eckd_private *basepriv, *startpriv; | |
2971 | struct DE_eckd_data *dedata; | |
2972 | struct LRE_eckd_data *lredata; | |
2973 | struct dcw *dcw; | |
2974 | ||
2975 | u32 begcyl, endcyl; | |
2976 | u16 heads, beghead, endhead; | |
2977 | u8 pfx_cmd; | |
2978 | ||
2979 | int rc = 0; | |
2980 | int sector = 0; | |
2981 | int dn, d; | |
2982 | ||
2983 | ||
2984 | /* setup prefix data */ | |
543691a4 SO |
2985 | basepriv = basedev->private; |
2986 | startpriv = startdev->private; | |
f3eb5384 SW |
2987 | dedata = &pfxdata.define_extent; |
2988 | lredata = &pfxdata.locate_record; | |
2989 | ||
2990 | memset(&pfxdata, 0, sizeof(pfxdata)); | |
2991 | pfxdata.format = 1; /* PFX with LRE */ | |
2992 | pfxdata.base_address = basepriv->ned->unit_addr; | |
2993 | pfxdata.base_lss = basepriv->ned->ID; | |
2994 | pfxdata.validity.define_extent = 1; | |
2995 | ||
2996 | /* private uid is kept up to date, conf_data may be outdated */ | |
2997 | if (startpriv->uid.type != UA_BASE_DEVICE) { | |
2998 | pfxdata.validity.verify_base = 1; | |
2999 | if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) | |
3000 | pfxdata.validity.hyper_pav = 1; | |
3001 | } | |
3002 | ||
3003 | switch (cmd) { | |
3004 | case DASD_ECKD_CCW_READ_TRACK_DATA: | |
3005 | dedata->mask.perm = 0x1; | |
3006 | dedata->attributes.operation = basepriv->attrib.operation; | |
3007 | dedata->blk_size = blksize; | |
3008 | dedata->ga_extended |= 0x42; | |
3009 | lredata->operation.orientation = 0x0; | |
3010 | lredata->operation.operation = 0x0C; | |
3011 | lredata->auxiliary.check_bytes = 0x01; | |
3012 | pfx_cmd = DASD_ECKD_CCW_PFX_READ; | |
3013 | break; | |
3014 | case DASD_ECKD_CCW_WRITE_TRACK_DATA: | |
3015 | dedata->mask.perm = 0x02; | |
3016 | dedata->attributes.operation = basepriv->attrib.operation; | |
3017 | dedata->blk_size = blksize; | |
3018 | rc = check_XRC_on_prefix(&pfxdata, basedev); | |
3019 | dedata->ga_extended |= 0x42; | |
3020 | lredata->operation.orientation = 0x0; | |
3021 | lredata->operation.operation = 0x3F; | |
3022 | lredata->extended_operation = 0x23; | |
3023 | lredata->auxiliary.check_bytes = 0x2; | |
3024 | pfx_cmd = DASD_ECKD_CCW_PFX; | |
3025 | break; | |
3026 | default: | |
3027 | DBF_DEV_EVENT(DBF_ERR, basedev, | |
3028 | "prepare itcw, unknown opcode 0x%x", cmd); | |
3029 | BUG(); | |
3030 | break; | |
3031 | } | |
3032 | if (rc) | |
3033 | return rc; | |
3034 | ||
3035 | dedata->attributes.mode = 0x3; /* ECKD */ | |
3036 | ||
3037 | heads = basepriv->rdc_data.trk_per_cyl; | |
3038 | begcyl = trk / heads; | |
3039 | beghead = trk % heads; | |
3040 | endcyl = totrk / heads; | |
3041 | endhead = totrk % heads; | |
3042 | ||
3043 | /* check for sequential prestage - enhance cylinder range */ | |
3044 | if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || | |
3045 | dedata->attributes.operation == DASD_SEQ_ACCESS) { | |
3046 | ||
3047 | if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) | |
3048 | endcyl += basepriv->attrib.nr_cyl; | |
3049 | else | |
3050 | endcyl = (basepriv->real_cyl - 1); | |
3051 | } | |
3052 | ||
3053 | set_ch_t(&dedata->beg_ext, begcyl, beghead); | |
3054 | set_ch_t(&dedata->end_ext, endcyl, endhead); | |
3055 | ||
3056 | dedata->ep_format = 0x20; /* records per track is valid */ | |
3057 | dedata->ep_rec_per_track = blk_per_trk; | |
3058 | ||
3059 | if (rec_on_trk) { | |
3060 | switch (basepriv->rdc_data.dev_type) { | |
3061 | case 0x3390: | |
3062 | dn = ceil_quot(blksize + 6, 232); | |
3063 | d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); | |
3064 | sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; | |
3065 | break; | |
3066 | case 0x3380: | |
3067 | d = 7 + ceil_quot(blksize + 12, 32); | |
3068 | sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; | |
3069 | break; | |
3070 | } | |
3071 | } | |
3072 | ||
3073 | lredata->auxiliary.length_valid = 1; | |
3074 | lredata->auxiliary.length_scope = 1; | |
3075 | lredata->auxiliary.imbedded_ccw_valid = 1; | |
3076 | lredata->length = tlf; | |
3077 | lredata->imbedded_ccw = cmd; | |
3078 | lredata->count = count; | |
3079 | lredata->sector = sector; | |
3080 | set_ch_t(&lredata->seek_addr, begcyl, beghead); | |
3081 | lredata->search_arg.cyl = lredata->seek_addr.cyl; | |
3082 | lredata->search_arg.head = lredata->seek_addr.head; | |
3083 | lredata->search_arg.record = rec_on_trk; | |
3084 | ||
3085 | dcw = itcw_add_dcw(itcw, pfx_cmd, 0, | |
3086 | &pfxdata, sizeof(pfxdata), total_data_size); | |
82a7b955 | 3087 | return PTR_RET(dcw); |
f3eb5384 SW |
3088 | } |
3089 | ||
3090 | static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( | |
3091 | struct dasd_device *startdev, | |
3092 | struct dasd_block *block, | |
3093 | struct request *req, | |
3094 | sector_t first_rec, | |
3095 | sector_t last_rec, | |
3096 | sector_t first_trk, | |
3097 | sector_t last_trk, | |
3098 | unsigned int first_offs, | |
3099 | unsigned int last_offs, | |
3100 | unsigned int blk_per_trk, | |
3101 | unsigned int blksize) | |
3102 | { | |
f3eb5384 SW |
3103 | struct dasd_ccw_req *cqr; |
3104 | struct req_iterator iter; | |
7988613b | 3105 | struct bio_vec bv; |
f3eb5384 SW |
3106 | char *dst; |
3107 | unsigned int trkcount, ctidaw; | |
3108 | unsigned char cmd; | |
3109 | struct dasd_device *basedev; | |
3110 | unsigned int tlf; | |
3111 | struct itcw *itcw; | |
3112 | struct tidaw *last_tidaw = NULL; | |
3113 | int itcw_op; | |
3114 | size_t itcw_size; | |
ef19298b SW |
3115 | u8 tidaw_flags; |
3116 | unsigned int seg_len, part_len, len_to_track_end; | |
3117 | unsigned char new_track; | |
3118 | sector_t recid, trkid; | |
3119 | unsigned int offs; | |
3120 | unsigned int count, count_to_trk_end; | |
cd10502b | 3121 | int ret; |
f3eb5384 SW |
3122 | |
3123 | basedev = block->base; | |
f3eb5384 SW |
3124 | if (rq_data_dir(req) == READ) { |
3125 | cmd = DASD_ECKD_CCW_READ_TRACK_DATA; | |
3126 | itcw_op = ITCW_OP_READ; | |
3127 | } else if (rq_data_dir(req) == WRITE) { | |
3128 | cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; | |
3129 | itcw_op = ITCW_OP_WRITE; | |
3130 | } else | |
3131 | return ERR_PTR(-EINVAL); | |
3132 | ||
3133 | /* trackbased I/O needs address all memory via TIDAWs, | |
3134 | * not just for 64 bit addresses. This allows us to map | |
3135 | * each segment directly to one tidaw. | |
ef19298b SW |
3136 | * In the case of write requests, additional tidaws may |
3137 | * be needed when a segment crosses a track boundary. | |
f3eb5384 SW |
3138 | */ |
3139 | trkcount = last_trk - first_trk + 1; | |
3140 | ctidaw = 0; | |
3141 | rq_for_each_segment(bv, req, iter) { | |
3142 | ++ctidaw; | |
3143 | } | |
ef19298b SW |
3144 | if (rq_data_dir(req) == WRITE) |
3145 | ctidaw += (last_trk - first_trk); | |
f3eb5384 SW |
3146 | |
3147 | /* Allocate the ccw request. */ | |
3148 | itcw_size = itcw_calc_size(0, ctidaw, 0); | |
68b781fe | 3149 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); |
f3eb5384 SW |
3150 | if (IS_ERR(cqr)) |
3151 | return cqr; | |
3152 | ||
f3eb5384 SW |
3153 | /* transfer length factor: how many bytes to read from the last track */ |
3154 | if (first_trk == last_trk) | |
3155 | tlf = last_offs - first_offs + 1; | |
3156 | else | |
3157 | tlf = last_offs + 1; | |
3158 | tlf *= blksize; | |
3159 | ||
3160 | itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); | |
ef19298b | 3161 | if (IS_ERR(itcw)) { |
cd10502b JL |
3162 | ret = -EINVAL; |
3163 | goto out_error; | |
ef19298b | 3164 | } |
f3eb5384 | 3165 | cqr->cpaddr = itcw_get_tcw(itcw); |
f3eb5384 SW |
3166 | if (prepare_itcw(itcw, first_trk, last_trk, |
3167 | cmd, basedev, startdev, | |
3168 | first_offs + 1, | |
3169 | trkcount, blksize, | |
3170 | (last_rec - first_rec + 1) * blksize, | |
3171 | tlf, blk_per_trk) == -EAGAIN) { | |
3172 | /* Clock not in sync and XRC is enabled. | |
3173 | * Try again later. | |
3174 | */ | |
cd10502b JL |
3175 | ret = -EAGAIN; |
3176 | goto out_error; | |
f3eb5384 | 3177 | } |
d54cddb6 | 3178 | len_to_track_end = 0; |
f3eb5384 SW |
3179 | /* |
3180 | * A tidaw can address 4k of memory, but must not cross page boundaries | |
3181 | * We can let the block layer handle this by setting | |
3182 | * blk_queue_segment_boundary to page boundaries and | |
3183 | * blk_max_segment_size to page size when setting up the request queue. | |
ef19298b SW |
3184 | * For write requests, a TIDAW must not cross track boundaries, because |
3185 | * we have to set the CBC flag on the last tidaw for each track. | |
f3eb5384 | 3186 | */ |
ef19298b SW |
3187 | if (rq_data_dir(req) == WRITE) { |
3188 | new_track = 1; | |
3189 | recid = first_rec; | |
3190 | rq_for_each_segment(bv, req, iter) { | |
7988613b KO |
3191 | dst = page_address(bv.bv_page) + bv.bv_offset; |
3192 | seg_len = bv.bv_len; | |
ef19298b SW |
3193 | while (seg_len) { |
3194 | if (new_track) { | |
3195 | trkid = recid; | |
3196 | offs = sector_div(trkid, blk_per_trk); | |
3197 | count_to_trk_end = blk_per_trk - offs; | |
3198 | count = min((last_rec - recid + 1), | |
3199 | (sector_t)count_to_trk_end); | |
3200 | len_to_track_end = count * blksize; | |
3201 | recid += count; | |
3202 | new_track = 0; | |
3203 | } | |
3204 | part_len = min(seg_len, len_to_track_end); | |
3205 | seg_len -= part_len; | |
3206 | len_to_track_end -= part_len; | |
3207 | /* We need to end the tidaw at track end */ | |
3208 | if (!len_to_track_end) { | |
3209 | new_track = 1; | |
3210 | tidaw_flags = TIDAW_FLAGS_INSERT_CBC; | |
3211 | } else | |
3212 | tidaw_flags = 0; | |
3213 | last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, | |
3214 | dst, part_len); | |
cd10502b JL |
3215 | if (IS_ERR(last_tidaw)) { |
3216 | ret = -EINVAL; | |
3217 | goto out_error; | |
3218 | } | |
ef19298b SW |
3219 | dst += part_len; |
3220 | } | |
3221 | } | |
3222 | } else { | |
3223 | rq_for_each_segment(bv, req, iter) { | |
7988613b | 3224 | dst = page_address(bv.bv_page) + bv.bv_offset; |
ef19298b | 3225 | last_tidaw = itcw_add_tidaw(itcw, 0x00, |
7988613b | 3226 | dst, bv.bv_len); |
cd10502b JL |
3227 | if (IS_ERR(last_tidaw)) { |
3228 | ret = -EINVAL; | |
3229 | goto out_error; | |
3230 | } | |
ef19298b | 3231 | } |
f3eb5384 | 3232 | } |
ef19298b SW |
3233 | last_tidaw->flags |= TIDAW_FLAGS_LAST; |
3234 | last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; | |
f3eb5384 SW |
3235 | itcw_finalize(itcw); |
3236 | ||
3237 | if (blk_noretry_request(req) || | |
3238 | block->base->features & DASD_FEATURE_FAILFAST) | |
3239 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); | |
ef19298b | 3240 | cqr->cpmode = 1; |
f3eb5384 SW |
3241 | cqr->startdev = startdev; |
3242 | cqr->memdev = startdev; | |
3243 | cqr->block = block; | |
7c8faa86 | 3244 | cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ |
a4d26c6a | 3245 | cqr->lpm = startdev->path_data.ppm; |
1f1ee9ad | 3246 | cqr->retries = startdev->default_retries; |
1aae0560 | 3247 | cqr->buildclk = get_tod_clock(); |
f3eb5384 SW |
3248 | cqr->status = DASD_CQR_FILLED; |
3249 | return cqr; | |
cd10502b JL |
3250 | out_error: |
3251 | dasd_sfree_request(cqr, startdev); | |
3252 | return ERR_PTR(ret); | |
f3eb5384 SW |
3253 | } |
3254 | ||
3255 | static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, | |
3256 | struct dasd_block *block, | |
3257 | struct request *req) | |
3258 | { | |
ef19298b | 3259 | int cmdrtd, cmdwtd; |
f3eb5384 | 3260 | int use_prefix; |
ef19298b | 3261 | int fcx_multitrack; |
45b44d76 | 3262 | struct dasd_eckd_private *private; |
f3eb5384 SW |
3263 | struct dasd_device *basedev; |
3264 | sector_t first_rec, last_rec; | |
3265 | sector_t first_trk, last_trk; | |
3266 | unsigned int first_offs, last_offs; | |
3267 | unsigned int blk_per_trk, blksize; | |
3268 | int cdlspecial; | |
ef19298b | 3269 | unsigned int data_size; |
f3eb5384 SW |
3270 | struct dasd_ccw_req *cqr; |
3271 | ||
3272 | basedev = block->base; | |
543691a4 | 3273 | private = basedev->private; |
f3eb5384 SW |
3274 | |
3275 | /* Calculate number of blocks/records per track. */ | |
3276 | blksize = block->bp_block; | |
3277 | blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); | |
6fca97a9 SH |
3278 | if (blk_per_trk == 0) |
3279 | return ERR_PTR(-EINVAL); | |
f3eb5384 | 3280 | /* Calculate record id of first and last block. */ |
83096ebf | 3281 | first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; |
f3eb5384 SW |
3282 | first_offs = sector_div(first_trk, blk_per_trk); |
3283 | last_rec = last_trk = | |
83096ebf | 3284 | (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; |
f3eb5384 SW |
3285 | last_offs = sector_div(last_trk, blk_per_trk); |
3286 | cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); | |
3287 | ||
ef19298b SW |
3288 | fcx_multitrack = private->features.feature[40] & 0x20; |
3289 | data_size = blk_rq_bytes(req); | |
26a35f37 SW |
3290 | if (data_size % blksize) |
3291 | return ERR_PTR(-EINVAL); | |
ef19298b SW |
3292 | /* tpm write request add CBC data on each track boundary */ |
3293 | if (rq_data_dir(req) == WRITE) | |
3294 | data_size += (last_trk - first_trk) * 4; | |
f3eb5384 SW |
3295 | |
3296 | /* is read track data and write track data in command mode supported? */ | |
3297 | cmdrtd = private->features.feature[9] & 0x20; | |
3298 | cmdwtd = private->features.feature[12] & 0x40; | |
3299 | use_prefix = private->features.feature[8] & 0x01; | |
3300 | ||
3301 | cqr = NULL; | |
3302 | if (cdlspecial || dasd_page_cache) { | |
3303 | /* do nothing, just fall through to the cmd mode single case */ | |
ef19298b SW |
3304 | } else if ((data_size <= private->fcx_max_data) |
3305 | && (fcx_multitrack || (first_trk == last_trk))) { | |
f3eb5384 SW |
3306 | cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, |
3307 | first_rec, last_rec, | |
3308 | first_trk, last_trk, | |
3309 | first_offs, last_offs, | |
3310 | blk_per_trk, blksize); | |
ef19298b SW |
3311 | if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && |
3312 | (PTR_ERR(cqr) != -ENOMEM)) | |
f3eb5384 SW |
3313 | cqr = NULL; |
3314 | } else if (use_prefix && | |
3315 | (((rq_data_dir(req) == READ) && cmdrtd) || | |
3316 | ((rq_data_dir(req) == WRITE) && cmdwtd))) { | |
3317 | cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, | |
3318 | first_rec, last_rec, | |
3319 | first_trk, last_trk, | |
3320 | first_offs, last_offs, | |
3321 | blk_per_trk, blksize); | |
ef19298b SW |
3322 | if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && |
3323 | (PTR_ERR(cqr) != -ENOMEM)) | |
f3eb5384 SW |
3324 | cqr = NULL; |
3325 | } | |
3326 | if (!cqr) | |
3327 | cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, | |
3328 | first_rec, last_rec, | |
3329 | first_trk, last_trk, | |
3330 | first_offs, last_offs, | |
3331 | blk_per_trk, blksize); | |
3332 | return cqr; | |
3333 | } | |
3334 | ||
e4dbb0f2 SH |
3335 | static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev, |
3336 | struct dasd_block *block, | |
3337 | struct request *req) | |
3338 | { | |
e4dbb0f2 SH |
3339 | unsigned long *idaws; |
3340 | struct dasd_device *basedev; | |
3341 | struct dasd_ccw_req *cqr; | |
3342 | struct ccw1 *ccw; | |
3343 | struct req_iterator iter; | |
7988613b | 3344 | struct bio_vec bv; |
e4dbb0f2 SH |
3345 | char *dst; |
3346 | unsigned char cmd; | |
3347 | unsigned int trkcount; | |
3348 | unsigned int seg_len, len_to_track_end; | |
3349 | unsigned int first_offs; | |
3350 | unsigned int cidaw, cplength, datasize; | |
558b9ef0 SW |
3351 | sector_t first_trk, last_trk, sectors; |
3352 | sector_t start_padding_sectors, end_sector_offset, end_padding_sectors; | |
e4dbb0f2 SH |
3353 | unsigned int pfx_datasize; |
3354 | ||
3355 | /* | |
3356 | * raw track access needs to be mutiple of 64k and on 64k boundary | |
558b9ef0 SW |
3357 | * For read requests we can fix an incorrect alignment by padding |
3358 | * the request with dummy pages. | |
e4dbb0f2 | 3359 | */ |
558b9ef0 SW |
3360 | start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK; |
3361 | end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) % | |
3362 | DASD_RAW_SECTORS_PER_TRACK; | |
3363 | end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) % | |
3364 | DASD_RAW_SECTORS_PER_TRACK; | |
3365 | basedev = block->base; | |
3366 | if ((start_padding_sectors || end_padding_sectors) && | |
3367 | (rq_data_dir(req) == WRITE)) { | |
3368 | DBF_DEV_EVENT(DBF_ERR, basedev, | |
3369 | "raw write not track aligned (%lu,%lu) req %p", | |
3370 | start_padding_sectors, end_padding_sectors, req); | |
e4dbb0f2 SH |
3371 | cqr = ERR_PTR(-EINVAL); |
3372 | goto out; | |
3373 | } | |
3374 | ||
3375 | first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; | |
3376 | last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / | |
3377 | DASD_RAW_SECTORS_PER_TRACK; | |
3378 | trkcount = last_trk - first_trk + 1; | |
3379 | first_offs = 0; | |
e4dbb0f2 SH |
3380 | |
3381 | if (rq_data_dir(req) == READ) | |
3382 | cmd = DASD_ECKD_CCW_READ_TRACK; | |
3383 | else if (rq_data_dir(req) == WRITE) | |
3384 | cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; | |
3385 | else { | |
3386 | cqr = ERR_PTR(-EINVAL); | |
3387 | goto out; | |
3388 | } | |
3389 | ||
3390 | /* | |
3391 | * Raw track based I/O needs IDAWs for each page, | |
3392 | * and not just for 64 bit addresses. | |
3393 | */ | |
3394 | cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; | |
3395 | ||
3396 | /* 1x prefix + one read/write ccw per track */ | |
3397 | cplength = 1 + trkcount; | |
3398 | ||
3399 | /* | |
3400 | * struct PFX_eckd_data has up to 2 byte as extended parameter | |
3401 | * this is needed for write full track and has to be mentioned | |
25985edc | 3402 | * separately |
e4dbb0f2 SH |
3403 | * add 8 instead of 2 to keep 8 byte boundary |
3404 | */ | |
3405 | pfx_datasize = sizeof(struct PFX_eckd_data) + 8; | |
3406 | ||
3407 | datasize = pfx_datasize + cidaw * sizeof(unsigned long long); | |
3408 | ||
3409 | /* Allocate the ccw request. */ | |
3410 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, | |
3411 | datasize, startdev); | |
3412 | if (IS_ERR(cqr)) | |
3413 | goto out; | |
3414 | ccw = cqr->cpaddr; | |
3415 | ||
3416 | if (prefix_LRE(ccw++, cqr->data, first_trk, last_trk, cmd, | |
3417 | basedev, startdev, 1 /* format */, first_offs + 1, | |
3418 | trkcount, 0, 0) == -EAGAIN) { | |
3419 | /* Clock not in sync and XRC is enabled. | |
3420 | * Try again later. | |
3421 | */ | |
3422 | dasd_sfree_request(cqr, startdev); | |
3423 | cqr = ERR_PTR(-EAGAIN); | |
3424 | goto out; | |
3425 | } | |
3426 | ||
3427 | idaws = (unsigned long *)(cqr->data + pfx_datasize); | |
e4dbb0f2 | 3428 | len_to_track_end = 0; |
558b9ef0 SW |
3429 | if (start_padding_sectors) { |
3430 | ccw[-1].flags |= CCW_FLAG_CC; | |
3431 | ccw->cmd_code = cmd; | |
3432 | /* maximum 3390 track size */ | |
3433 | ccw->count = 57326; | |
3434 | /* 64k map to one track */ | |
3435 | len_to_track_end = 65536 - start_padding_sectors * 512; | |
3436 | ccw->cda = (__u32)(addr_t)idaws; | |
3437 | ccw->flags |= CCW_FLAG_IDA; | |
3438 | ccw->flags |= CCW_FLAG_SLI; | |
3439 | ccw++; | |
3440 | for (sectors = 0; sectors < start_padding_sectors; sectors += 8) | |
3441 | idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); | |
3442 | } | |
e4dbb0f2 | 3443 | rq_for_each_segment(bv, req, iter) { |
7988613b KO |
3444 | dst = page_address(bv.bv_page) + bv.bv_offset; |
3445 | seg_len = bv.bv_len; | |
558b9ef0 SW |
3446 | if (cmd == DASD_ECKD_CCW_READ_TRACK) |
3447 | memset(dst, 0, seg_len); | |
e4dbb0f2 SH |
3448 | if (!len_to_track_end) { |
3449 | ccw[-1].flags |= CCW_FLAG_CC; | |
3450 | ccw->cmd_code = cmd; | |
3451 | /* maximum 3390 track size */ | |
3452 | ccw->count = 57326; | |
3453 | /* 64k map to one track */ | |
3454 | len_to_track_end = 65536; | |
3455 | ccw->cda = (__u32)(addr_t)idaws; | |
3456 | ccw->flags |= CCW_FLAG_IDA; | |
3457 | ccw->flags |= CCW_FLAG_SLI; | |
3458 | ccw++; | |
3459 | } | |
3460 | len_to_track_end -= seg_len; | |
3461 | idaws = idal_create_words(idaws, dst, seg_len); | |
3462 | } | |
558b9ef0 SW |
3463 | for (sectors = 0; sectors < end_padding_sectors; sectors += 8) |
3464 | idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); | |
e4dbb0f2 SH |
3465 | if (blk_noretry_request(req) || |
3466 | block->base->features & DASD_FEATURE_FAILFAST) | |
3467 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); | |
3468 | cqr->startdev = startdev; | |
3469 | cqr->memdev = startdev; | |
3470 | cqr->block = block; | |
3471 | cqr->expires = startdev->default_expires * HZ; | |
3472 | cqr->lpm = startdev->path_data.ppm; | |
1f1ee9ad | 3473 | cqr->retries = startdev->default_retries; |
1aae0560 | 3474 | cqr->buildclk = get_tod_clock(); |
e4dbb0f2 SH |
3475 | cqr->status = DASD_CQR_FILLED; |
3476 | ||
3477 | if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN) | |
3478 | cqr = NULL; | |
3479 | out: | |
3480 | return cqr; | |
3481 | } | |
3482 | ||
3483 | ||
1da177e4 LT |
3484 | static int |
3485 | dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) | |
3486 | { | |
3487 | struct dasd_eckd_private *private; | |
3488 | struct ccw1 *ccw; | |
5705f702 | 3489 | struct req_iterator iter; |
7988613b | 3490 | struct bio_vec bv; |
1da177e4 LT |
3491 | char *dst, *cda; |
3492 | unsigned int blksize, blk_per_trk, off; | |
3493 | sector_t recid; | |
5705f702 | 3494 | int status; |
1da177e4 LT |
3495 | |
3496 | if (!dasd_page_cache) | |
3497 | goto out; | |
543691a4 | 3498 | private = cqr->block->base->private; |
8e09f215 | 3499 | blksize = cqr->block->bp_block; |
1da177e4 | 3500 | blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); |
83096ebf | 3501 | recid = blk_rq_pos(req) >> cqr->block->s2b_shift; |
1da177e4 LT |
3502 | ccw = cqr->cpaddr; |
3503 | /* Skip over define extent & locate record. */ | |
3504 | ccw++; | |
3505 | if (private->uses_cdl == 0 || recid > 2*blk_per_trk) | |
3506 | ccw++; | |
5705f702 | 3507 | rq_for_each_segment(bv, req, iter) { |
7988613b KO |
3508 | dst = page_address(bv.bv_page) + bv.bv_offset; |
3509 | for (off = 0; off < bv.bv_len; off += blksize) { | |
1da177e4 LT |
3510 | /* Skip locate record. */ |
3511 | if (private->uses_cdl && recid <= 2*blk_per_trk) | |
3512 | ccw++; | |
3513 | if (dst) { | |
3514 | if (ccw->flags & CCW_FLAG_IDA) | |
3515 | cda = *((char **)((addr_t) ccw->cda)); | |
3516 | else | |
3517 | cda = (char *)((addr_t) ccw->cda); | |
3518 | if (dst != cda) { | |
3519 | if (rq_data_dir(req) == READ) | |
7988613b | 3520 | memcpy(dst, cda, bv.bv_len); |
1da177e4 LT |
3521 | kmem_cache_free(dasd_page_cache, |
3522 | (void *)((addr_t)cda & PAGE_MASK)); | |
3523 | } | |
3524 | dst = NULL; | |
3525 | } | |
3526 | ccw++; | |
3527 | recid++; | |
3528 | } | |
3529 | } | |
3530 | out: | |
3531 | status = cqr->status == DASD_CQR_DONE; | |
8e09f215 | 3532 | dasd_sfree_request(cqr, cqr->memdev); |
1da177e4 LT |
3533 | return status; |
3534 | } | |
3535 | ||
8e09f215 | 3536 | /* |
f3eb5384 | 3537 | * Modify ccw/tcw in cqr so it can be started on a base device. |
8e09f215 SW |
3538 | * |
3539 | * Note that this is not enough to restart the cqr! | |
3540 | * Either reset cqr->startdev as well (summary unit check handling) | |
3541 | * or restart via separate cqr (as in ERP handling). | |
3542 | */ | |
3543 | void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) | |
3544 | { | |
3545 | struct ccw1 *ccw; | |
3546 | struct PFX_eckd_data *pfxdata; | |
f3eb5384 SW |
3547 | struct tcw *tcw; |
3548 | struct tccb *tccb; | |
3549 | struct dcw *dcw; | |
3550 | ||
3551 | if (cqr->cpmode == 1) { | |
3552 | tcw = cqr->cpaddr; | |
3553 | tccb = tcw_get_tccb(tcw); | |
3554 | dcw = (struct dcw *)&tccb->tca[0]; | |
3555 | pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; | |
8e09f215 SW |
3556 | pfxdata->validity.verify_base = 0; |
3557 | pfxdata->validity.hyper_pav = 0; | |
f3eb5384 SW |
3558 | } else { |
3559 | ccw = cqr->cpaddr; | |
3560 | pfxdata = cqr->data; | |
3561 | if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { | |
3562 | pfxdata->validity.verify_base = 0; | |
3563 | pfxdata->validity.hyper_pav = 0; | |
3564 | } | |
8e09f215 SW |
3565 | } |
3566 | } | |
3567 | ||
3568 | #define DASD_ECKD_CHANQ_MAX_SIZE 4 | |
3569 | ||
3570 | static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, | |
3571 | struct dasd_block *block, | |
3572 | struct request *req) | |
3573 | { | |
3574 | struct dasd_eckd_private *private; | |
3575 | struct dasd_device *startdev; | |
3576 | unsigned long flags; | |
3577 | struct dasd_ccw_req *cqr; | |
3578 | ||
3579 | startdev = dasd_alias_get_start_dev(base); | |
3580 | if (!startdev) | |
3581 | startdev = base; | |
543691a4 | 3582 | private = startdev->private; |
8e09f215 SW |
3583 | if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) |
3584 | return ERR_PTR(-EBUSY); | |
3585 | ||
3586 | spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); | |
3587 | private->count++; | |
e4dbb0f2 SH |
3588 | if ((base->features & DASD_FEATURE_USERAW)) |
3589 | cqr = dasd_raw_build_cp(startdev, block, req); | |
3590 | else | |
3591 | cqr = dasd_eckd_build_cp(startdev, block, req); | |
8e09f215 SW |
3592 | if (IS_ERR(cqr)) |
3593 | private->count--; | |
3594 | spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); | |
3595 | return cqr; | |
3596 | } | |
3597 | ||
3598 | static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, | |
3599 | struct request *req) | |
3600 | { | |
3601 | struct dasd_eckd_private *private; | |
3602 | unsigned long flags; | |
3603 | ||
3604 | spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); | |
543691a4 | 3605 | private = cqr->memdev->private; |
8e09f215 SW |
3606 | private->count--; |
3607 | spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); | |
3608 | return dasd_eckd_free_cp(cqr, req); | |
3609 | } | |
3610 | ||
1da177e4 LT |
3611 | static int |
3612 | dasd_eckd_fill_info(struct dasd_device * device, | |
3613 | struct dasd_information2_t * info) | |
3614 | { | |
543691a4 | 3615 | struct dasd_eckd_private *private = device->private; |
1da177e4 | 3616 | |
1da177e4 LT |
3617 | info->label_block = 2; |
3618 | info->FBA_layout = private->uses_cdl ? 0 : 1; | |
3619 | info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; | |
543691a4 | 3620 | info->characteristics_size = sizeof(private->rdc_data); |
1da177e4 | 3621 | memcpy(info->characteristics, &private->rdc_data, |
543691a4 | 3622 | sizeof(private->rdc_data)); |
4abb08c2 SW |
3623 | info->confdata_size = min((unsigned long)private->conf_len, |
3624 | sizeof(info->configuration_data)); | |
3625 | memcpy(info->configuration_data, private->conf_data, | |
3626 | info->confdata_size); | |
1da177e4 LT |
3627 | return 0; |
3628 | } | |
3629 | ||
3630 | /* | |
3631 | * SECTION: ioctl functions for eckd devices. | |
3632 | */ | |
3633 | ||
3634 | /* | |
3635 | * Release device ioctl. | |
138c014d | 3636 | * Buils a channel programm to releases a prior reserved |
1da177e4 LT |
3637 | * (see dasd_eckd_reserve) device. |
3638 | */ | |
3639 | static int | |
1107ccfb | 3640 | dasd_eckd_release(struct dasd_device *device) |
1da177e4 | 3641 | { |
1da177e4 LT |
3642 | struct dasd_ccw_req *cqr; |
3643 | int rc; | |
f3eb5384 | 3644 | struct ccw1 *ccw; |
f932bcea | 3645 | int useglobal; |
1da177e4 LT |
3646 | |
3647 | if (!capable(CAP_SYS_ADMIN)) | |
3648 | return -EACCES; | |
3649 | ||
f932bcea | 3650 | useglobal = 0; |
68b781fe | 3651 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); |
1da177e4 | 3652 | if (IS_ERR(cqr)) { |
f932bcea SW |
3653 | mutex_lock(&dasd_reserve_mutex); |
3654 | useglobal = 1; | |
3655 | cqr = &dasd_reserve_req->cqr; | |
3656 | memset(cqr, 0, sizeof(*cqr)); | |
3657 | memset(&dasd_reserve_req->ccw, 0, | |
3658 | sizeof(dasd_reserve_req->ccw)); | |
3659 | cqr->cpaddr = &dasd_reserve_req->ccw; | |
3660 | cqr->data = &dasd_reserve_req->data; | |
3661 | cqr->magic = DASD_ECKD_MAGIC; | |
1da177e4 | 3662 | } |
f3eb5384 SW |
3663 | ccw = cqr->cpaddr; |
3664 | ccw->cmd_code = DASD_ECKD_CCW_RELEASE; | |
3665 | ccw->flags |= CCW_FLAG_SLI; | |
3666 | ccw->count = 32; | |
3667 | ccw->cda = (__u32)(addr_t) cqr->data; | |
8e09f215 SW |
3668 | cqr->startdev = device; |
3669 | cqr->memdev = device; | |
1da177e4 | 3670 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
1c01b8a5 | 3671 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
336c340b | 3672 | cqr->retries = 2; /* set retry counter to enable basic ERP */ |
1da177e4 | 3673 | cqr->expires = 2 * HZ; |
1aae0560 | 3674 | cqr->buildclk = get_tod_clock(); |
1da177e4 LT |
3675 | cqr->status = DASD_CQR_FILLED; |
3676 | ||
3677 | rc = dasd_sleep_on_immediatly(cqr); | |
5a27e60d SW |
3678 | if (!rc) |
3679 | clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); | |
1da177e4 | 3680 | |
f932bcea SW |
3681 | if (useglobal) |
3682 | mutex_unlock(&dasd_reserve_mutex); | |
3683 | else | |
3684 | dasd_sfree_request(cqr, cqr->memdev); | |
1da177e4 LT |
3685 | return rc; |
3686 | } | |
3687 | ||
3688 | /* | |
3689 | * Reserve device ioctl. | |
3690 | * Options are set to 'synchronous wait for interrupt' and | |
138c014d HH |
3691 | * 'timeout the request'. This leads to a terminate IO if |
3692 | * the interrupt is outstanding for a certain time. | |
1da177e4 LT |
3693 | */ |
3694 | static int | |
1107ccfb | 3695 | dasd_eckd_reserve(struct dasd_device *device) |
1da177e4 | 3696 | { |
1da177e4 LT |
3697 | struct dasd_ccw_req *cqr; |
3698 | int rc; | |
f3eb5384 | 3699 | struct ccw1 *ccw; |
f932bcea | 3700 | int useglobal; |
1da177e4 LT |
3701 | |
3702 | if (!capable(CAP_SYS_ADMIN)) | |
3703 | return -EACCES; | |
3704 | ||
f932bcea | 3705 | useglobal = 0; |
68b781fe | 3706 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); |
1da177e4 | 3707 | if (IS_ERR(cqr)) { |
f932bcea SW |
3708 | mutex_lock(&dasd_reserve_mutex); |
3709 | useglobal = 1; | |
3710 | cqr = &dasd_reserve_req->cqr; | |
3711 | memset(cqr, 0, sizeof(*cqr)); | |
3712 | memset(&dasd_reserve_req->ccw, 0, | |
3713 | sizeof(dasd_reserve_req->ccw)); | |
3714 | cqr->cpaddr = &dasd_reserve_req->ccw; | |
3715 | cqr->data = &dasd_reserve_req->data; | |
3716 | cqr->magic = DASD_ECKD_MAGIC; | |
1da177e4 | 3717 | } |
f3eb5384 SW |
3718 | ccw = cqr->cpaddr; |
3719 | ccw->cmd_code = DASD_ECKD_CCW_RESERVE; | |
3720 | ccw->flags |= CCW_FLAG_SLI; | |
3721 | ccw->count = 32; | |
3722 | ccw->cda = (__u32)(addr_t) cqr->data; | |
8e09f215 SW |
3723 | cqr->startdev = device; |
3724 | cqr->memdev = device; | |
1da177e4 | 3725 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
1c01b8a5 | 3726 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
336c340b | 3727 | cqr->retries = 2; /* set retry counter to enable basic ERP */ |
1da177e4 | 3728 | cqr->expires = 2 * HZ; |
1aae0560 | 3729 | cqr->buildclk = get_tod_clock(); |
1da177e4 LT |
3730 | cqr->status = DASD_CQR_FILLED; |
3731 | ||
3732 | rc = dasd_sleep_on_immediatly(cqr); | |
5a27e60d SW |
3733 | if (!rc) |
3734 | set_bit(DASD_FLAG_IS_RESERVED, &device->flags); | |
1da177e4 | 3735 | |
f932bcea SW |
3736 | if (useglobal) |
3737 | mutex_unlock(&dasd_reserve_mutex); | |
3738 | else | |
3739 | dasd_sfree_request(cqr, cqr->memdev); | |
1da177e4 LT |
3740 | return rc; |
3741 | } | |
3742 | ||
3743 | /* | |
3744 | * Steal lock ioctl - unconditional reserve device. | |
138c014d | 3745 | * Buils a channel programm to break a device's reservation. |
1da177e4 LT |
3746 | * (unconditional reserve) |
3747 | */ | |
3748 | static int | |
1107ccfb | 3749 | dasd_eckd_steal_lock(struct dasd_device *device) |
1da177e4 | 3750 | { |
1da177e4 LT |
3751 | struct dasd_ccw_req *cqr; |
3752 | int rc; | |
f3eb5384 | 3753 | struct ccw1 *ccw; |
f932bcea | 3754 | int useglobal; |
1da177e4 LT |
3755 | |
3756 | if (!capable(CAP_SYS_ADMIN)) | |
3757 | return -EACCES; | |
3758 | ||
f932bcea | 3759 | useglobal = 0; |
68b781fe | 3760 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); |
1da177e4 | 3761 | if (IS_ERR(cqr)) { |
f932bcea SW |
3762 | mutex_lock(&dasd_reserve_mutex); |
3763 | useglobal = 1; | |
3764 | cqr = &dasd_reserve_req->cqr; | |
3765 | memset(cqr, 0, sizeof(*cqr)); | |
3766 | memset(&dasd_reserve_req->ccw, 0, | |
3767 | sizeof(dasd_reserve_req->ccw)); | |
3768 | cqr->cpaddr = &dasd_reserve_req->ccw; | |
3769 | cqr->data = &dasd_reserve_req->data; | |
3770 | cqr->magic = DASD_ECKD_MAGIC; | |
1da177e4 | 3771 | } |
f3eb5384 SW |
3772 | ccw = cqr->cpaddr; |
3773 | ccw->cmd_code = DASD_ECKD_CCW_SLCK; | |
3774 | ccw->flags |= CCW_FLAG_SLI; | |
3775 | ccw->count = 32; | |
3776 | ccw->cda = (__u32)(addr_t) cqr->data; | |
8e09f215 SW |
3777 | cqr->startdev = device; |
3778 | cqr->memdev = device; | |
1da177e4 | 3779 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
1c01b8a5 | 3780 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
336c340b | 3781 | cqr->retries = 2; /* set retry counter to enable basic ERP */ |
1da177e4 | 3782 | cqr->expires = 2 * HZ; |
1aae0560 | 3783 | cqr->buildclk = get_tod_clock(); |
1da177e4 LT |
3784 | cqr->status = DASD_CQR_FILLED; |
3785 | ||
3786 | rc = dasd_sleep_on_immediatly(cqr); | |
5a27e60d SW |
3787 | if (!rc) |
3788 | set_bit(DASD_FLAG_IS_RESERVED, &device->flags); | |
1da177e4 | 3789 | |
f932bcea SW |
3790 | if (useglobal) |
3791 | mutex_unlock(&dasd_reserve_mutex); | |
3792 | else | |
3793 | dasd_sfree_request(cqr, cqr->memdev); | |
1da177e4 LT |
3794 | return rc; |
3795 | } | |
3796 | ||
196339f1 SW |
3797 | /* |
3798 | * SNID - Sense Path Group ID | |
3799 | * This ioctl may be used in situations where I/O is stalled due to | |
3800 | * a reserve, so if the normal dasd_smalloc_request fails, we use the | |
3801 | * preallocated dasd_reserve_req. | |
3802 | */ | |
3803 | static int dasd_eckd_snid(struct dasd_device *device, | |
3804 | void __user *argp) | |
3805 | { | |
3806 | struct dasd_ccw_req *cqr; | |
3807 | int rc; | |
3808 | struct ccw1 *ccw; | |
3809 | int useglobal; | |
3810 | struct dasd_snid_ioctl_data usrparm; | |
3811 | ||
3812 | if (!capable(CAP_SYS_ADMIN)) | |
3813 | return -EACCES; | |
3814 | ||
3815 | if (copy_from_user(&usrparm, argp, sizeof(usrparm))) | |
3816 | return -EFAULT; | |
3817 | ||
3818 | useglobal = 0; | |
3819 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, | |
3820 | sizeof(struct dasd_snid_data), device); | |
3821 | if (IS_ERR(cqr)) { | |
3822 | mutex_lock(&dasd_reserve_mutex); | |
3823 | useglobal = 1; | |
3824 | cqr = &dasd_reserve_req->cqr; | |
3825 | memset(cqr, 0, sizeof(*cqr)); | |
3826 | memset(&dasd_reserve_req->ccw, 0, | |
3827 | sizeof(dasd_reserve_req->ccw)); | |
3828 | cqr->cpaddr = &dasd_reserve_req->ccw; | |
3829 | cqr->data = &dasd_reserve_req->data; | |
3830 | cqr->magic = DASD_ECKD_MAGIC; | |
3831 | } | |
3832 | ccw = cqr->cpaddr; | |
3833 | ccw->cmd_code = DASD_ECKD_CCW_SNID; | |
3834 | ccw->flags |= CCW_FLAG_SLI; | |
3835 | ccw->count = 12; | |
3836 | ccw->cda = (__u32)(addr_t) cqr->data; | |
3837 | cqr->startdev = device; | |
3838 | cqr->memdev = device; | |
3839 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); | |
3840 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); | |
5a27e60d | 3841 | set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); |
196339f1 SW |
3842 | cqr->retries = 5; |
3843 | cqr->expires = 10 * HZ; | |
1aae0560 | 3844 | cqr->buildclk = get_tod_clock(); |
196339f1 SW |
3845 | cqr->status = DASD_CQR_FILLED; |
3846 | cqr->lpm = usrparm.path_mask; | |
3847 | ||
3848 | rc = dasd_sleep_on_immediatly(cqr); | |
3849 | /* verify that I/O processing didn't modify the path mask */ | |
3850 | if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) | |
3851 | rc = -EIO; | |
3852 | if (!rc) { | |
3853 | usrparm.data = *((struct dasd_snid_data *)cqr->data); | |
3854 | if (copy_to_user(argp, &usrparm, sizeof(usrparm))) | |
3855 | rc = -EFAULT; | |
3856 | } | |
3857 | ||
3858 | if (useglobal) | |
3859 | mutex_unlock(&dasd_reserve_mutex); | |
3860 | else | |
3861 | dasd_sfree_request(cqr, cqr->memdev); | |
3862 | return rc; | |
3863 | } | |
3864 | ||
1da177e4 LT |
3865 | /* |
3866 | * Read performance statistics | |
3867 | */ | |
3868 | static int | |
1107ccfb | 3869 | dasd_eckd_performance(struct dasd_device *device, void __user *argp) |
1da177e4 | 3870 | { |
1da177e4 LT |
3871 | struct dasd_psf_prssd_data *prssdp; |
3872 | struct dasd_rssd_perf_stats_t *stats; | |
3873 | struct dasd_ccw_req *cqr; | |
3874 | struct ccw1 *ccw; | |
3875 | int rc; | |
3876 | ||
68b781fe | 3877 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, |
8e09f215 SW |
3878 | (sizeof(struct dasd_psf_prssd_data) + |
3879 | sizeof(struct dasd_rssd_perf_stats_t)), | |
1da177e4 LT |
3880 | device); |
3881 | if (IS_ERR(cqr)) { | |
fc19f381 | 3882 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
1da177e4 LT |
3883 | "Could not allocate initialization request"); |
3884 | return PTR_ERR(cqr); | |
3885 | } | |
8e09f215 SW |
3886 | cqr->startdev = device; |
3887 | cqr->memdev = device; | |
1da177e4 | 3888 | cqr->retries = 0; |
eb6e199b | 3889 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
1da177e4 LT |
3890 | cqr->expires = 10 * HZ; |
3891 | ||
3892 | /* Prepare for Read Subsystem Data */ | |
3893 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
8e09f215 | 3894 | memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); |
1da177e4 | 3895 | prssdp->order = PSF_ORDER_PRSSD; |
5d67d164 | 3896 | prssdp->suborder = 0x01; /* Performance Statistics */ |
1da177e4 LT |
3897 | prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ |
3898 | ||
3899 | ccw = cqr->cpaddr; | |
3900 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
8e09f215 | 3901 | ccw->count = sizeof(struct dasd_psf_prssd_data); |
1da177e4 LT |
3902 | ccw->flags |= CCW_FLAG_CC; |
3903 | ccw->cda = (__u32)(addr_t) prssdp; | |
3904 | ||
3905 | /* Read Subsystem Data - Performance Statistics */ | |
3906 | stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); | |
8e09f215 | 3907 | memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); |
1da177e4 LT |
3908 | |
3909 | ccw++; | |
3910 | ccw->cmd_code = DASD_ECKD_CCW_RSSD; | |
8e09f215 | 3911 | ccw->count = sizeof(struct dasd_rssd_perf_stats_t); |
1da177e4 LT |
3912 | ccw->cda = (__u32)(addr_t) stats; |
3913 | ||
1aae0560 | 3914 | cqr->buildclk = get_tod_clock(); |
1da177e4 LT |
3915 | cqr->status = DASD_CQR_FILLED; |
3916 | rc = dasd_sleep_on(cqr); | |
3917 | if (rc == 0) { | |
1da177e4 LT |
3918 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; |
3919 | stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); | |
1107ccfb CH |
3920 | if (copy_to_user(argp, stats, |
3921 | sizeof(struct dasd_rssd_perf_stats_t))) | |
3922 | rc = -EFAULT; | |
1da177e4 | 3923 | } |
8e09f215 | 3924 | dasd_sfree_request(cqr, cqr->memdev); |
1da177e4 LT |
3925 | return rc; |
3926 | } | |
3927 | ||
3928 | /* | |
3929 | * Get attributes (cache operations) | |
3930 | * Returnes the cache attributes used in Define Extend (DE). | |
3931 | */ | |
3932 | static int | |
1107ccfb | 3933 | dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) |
1da177e4 | 3934 | { |
543691a4 | 3935 | struct dasd_eckd_private *private = device->private; |
1107ccfb | 3936 | struct attrib_data_t attrib = private->attrib; |
1da177e4 LT |
3937 | int rc; |
3938 | ||
3939 | if (!capable(CAP_SYS_ADMIN)) | |
3940 | return -EACCES; | |
1107ccfb | 3941 | if (!argp) |
1da177e4 LT |
3942 | return -EINVAL; |
3943 | ||
1107ccfb CH |
3944 | rc = 0; |
3945 | if (copy_to_user(argp, (long *) &attrib, | |
8e09f215 | 3946 | sizeof(struct attrib_data_t))) |
1107ccfb | 3947 | rc = -EFAULT; |
1da177e4 LT |
3948 | |
3949 | return rc; | |
3950 | } | |
3951 | ||
3952 | /* | |
3953 | * Set attributes (cache operations) | |
3954 | * Stores the attributes for cache operation to be used in Define Extend (DE). | |
3955 | */ | |
3956 | static int | |
1107ccfb | 3957 | dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) |
1da177e4 | 3958 | { |
543691a4 | 3959 | struct dasd_eckd_private *private = device->private; |
1da177e4 LT |
3960 | struct attrib_data_t attrib; |
3961 | ||
3962 | if (!capable(CAP_SYS_ADMIN)) | |
3963 | return -EACCES; | |
1107ccfb | 3964 | if (!argp) |
1da177e4 LT |
3965 | return -EINVAL; |
3966 | ||
1107ccfb | 3967 | if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) |
1da177e4 | 3968 | return -EFAULT; |
1da177e4 LT |
3969 | private->attrib = attrib; |
3970 | ||
fc19f381 SH |
3971 | dev_info(&device->cdev->dev, |
3972 | "The DASD cache mode was set to %x (%i cylinder prestage)\n", | |
3973 | private->attrib.operation, private->attrib.nr_cyl); | |
1da177e4 LT |
3974 | return 0; |
3975 | } | |
3976 | ||
ab1d848f NH |
3977 | /* |
3978 | * Issue syscall I/O to EMC Symmetrix array. | |
3979 | * CCWs are PSF and RSSD | |
3980 | */ | |
3981 | static int dasd_symm_io(struct dasd_device *device, void __user *argp) | |
3982 | { | |
3983 | struct dasd_symmio_parms usrparm; | |
3984 | char *psf_data, *rssd_result; | |
3985 | struct dasd_ccw_req *cqr; | |
3986 | struct ccw1 *ccw; | |
52898025 | 3987 | char psf0, psf1; |
ab1d848f NH |
3988 | int rc; |
3989 | ||
52898025 NH |
3990 | if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) |
3991 | return -EACCES; | |
3992 | psf0 = psf1 = 0; | |
3993 | ||
ab1d848f NH |
3994 | /* Copy parms from caller */ |
3995 | rc = -EFAULT; | |
3996 | if (copy_from_user(&usrparm, argp, sizeof(usrparm))) | |
3997 | goto out; | |
92d62891 | 3998 | if (is_compat_task()) { |
f8b06859 | 3999 | /* Make sure pointers are sane even on 31 bit. */ |
ab1d848f | 4000 | rc = -EINVAL; |
f8b06859 HC |
4001 | if ((usrparm.psf_data >> 32) != 0) |
4002 | goto out; | |
4003 | if ((usrparm.rssd_result >> 32) != 0) | |
4004 | goto out; | |
4005 | usrparm.psf_data &= 0x7fffffffULL; | |
4006 | usrparm.rssd_result &= 0x7fffffffULL; | |
ab1d848f | 4007 | } |
ab1d848f NH |
4008 | /* alloc I/O data area */ |
4009 | psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); | |
4010 | rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); | |
4011 | if (!psf_data || !rssd_result) { | |
4012 | rc = -ENOMEM; | |
4013 | goto out_free; | |
4014 | } | |
4015 | ||
4016 | /* get syscall header from user space */ | |
4017 | rc = -EFAULT; | |
4018 | if (copy_from_user(psf_data, | |
4019 | (void __user *)(unsigned long) usrparm.psf_data, | |
4020 | usrparm.psf_data_len)) | |
4021 | goto out_free; | |
52898025 NH |
4022 | psf0 = psf_data[0]; |
4023 | psf1 = psf_data[1]; | |
ab1d848f NH |
4024 | |
4025 | /* setup CCWs for PSF + RSSD */ | |
68b781fe | 4026 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device); |
ab1d848f | 4027 | if (IS_ERR(cqr)) { |
fc19f381 | 4028 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
ab1d848f NH |
4029 | "Could not allocate initialization request"); |
4030 | rc = PTR_ERR(cqr); | |
4031 | goto out_free; | |
4032 | } | |
4033 | ||
4034 | cqr->startdev = device; | |
4035 | cqr->memdev = device; | |
4036 | cqr->retries = 3; | |
4037 | cqr->expires = 10 * HZ; | |
1aae0560 | 4038 | cqr->buildclk = get_tod_clock(); |
ab1d848f NH |
4039 | cqr->status = DASD_CQR_FILLED; |
4040 | ||
4041 | /* Build the ccws */ | |
4042 | ccw = cqr->cpaddr; | |
4043 | ||
4044 | /* PSF ccw */ | |
4045 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
4046 | ccw->count = usrparm.psf_data_len; | |
4047 | ccw->flags |= CCW_FLAG_CC; | |
4048 | ccw->cda = (__u32)(addr_t) psf_data; | |
4049 | ||
4050 | ccw++; | |
4051 | ||
4052 | /* RSSD ccw */ | |
4053 | ccw->cmd_code = DASD_ECKD_CCW_RSSD; | |
4054 | ccw->count = usrparm.rssd_result_len; | |
4055 | ccw->flags = CCW_FLAG_SLI ; | |
4056 | ccw->cda = (__u32)(addr_t) rssd_result; | |
4057 | ||
4058 | rc = dasd_sleep_on(cqr); | |
4059 | if (rc) | |
4060 | goto out_sfree; | |
4061 | ||
4062 | rc = -EFAULT; | |
4063 | if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, | |
4064 | rssd_result, usrparm.rssd_result_len)) | |
4065 | goto out_sfree; | |
4066 | rc = 0; | |
4067 | ||
4068 | out_sfree: | |
4069 | dasd_sfree_request(cqr, cqr->memdev); | |
4070 | out_free: | |
4071 | kfree(rssd_result); | |
4072 | kfree(psf_data); | |
4073 | out: | |
52898025 NH |
4074 | DBF_DEV_EVENT(DBF_WARNING, device, |
4075 | "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", | |
4076 | (int) psf0, (int) psf1, rc); | |
ab1d848f NH |
4077 | return rc; |
4078 | } | |
4079 | ||
1107ccfb | 4080 | static int |
8e09f215 | 4081 | dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) |
1107ccfb | 4082 | { |
8e09f215 SW |
4083 | struct dasd_device *device = block->base; |
4084 | ||
1107ccfb CH |
4085 | switch (cmd) { |
4086 | case BIODASDGATTR: | |
4087 | return dasd_eckd_get_attrib(device, argp); | |
4088 | case BIODASDSATTR: | |
4089 | return dasd_eckd_set_attrib(device, argp); | |
4090 | case BIODASDPSRD: | |
4091 | return dasd_eckd_performance(device, argp); | |
4092 | case BIODASDRLSE: | |
4093 | return dasd_eckd_release(device); | |
4094 | case BIODASDRSRV: | |
4095 | return dasd_eckd_reserve(device); | |
4096 | case BIODASDSLCK: | |
4097 | return dasd_eckd_steal_lock(device); | |
196339f1 SW |
4098 | case BIODASDSNID: |
4099 | return dasd_eckd_snid(device, argp); | |
ab1d848f NH |
4100 | case BIODASDSYMMIO: |
4101 | return dasd_symm_io(device, argp); | |
1107ccfb | 4102 | default: |
6b79d14e | 4103 | return -ENOTTY; |
1107ccfb CH |
4104 | } |
4105 | } | |
4106 | ||
445b5b49 HH |
4107 | /* |
4108 | * Dump the range of CCWs into 'page' buffer | |
4109 | * and return number of printed chars. | |
4110 | */ | |
4d284cac | 4111 | static int |
445b5b49 HH |
4112 | dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) |
4113 | { | |
4114 | int len, count; | |
4115 | char *datap; | |
4116 | ||
4117 | len = 0; | |
4118 | while (from <= to) { | |
773bab4a | 4119 | len += sprintf(page + len, PRINTK_HEADER |
445b5b49 HH |
4120 | " CCW %p: %08X %08X DAT:", |
4121 | from, ((int *) from)[0], ((int *) from)[1]); | |
4122 | ||
4123 | /* get pointer to data (consider IDALs) */ | |
4124 | if (from->flags & CCW_FLAG_IDA) | |
4125 | datap = (char *) *((addr_t *) (addr_t) from->cda); | |
4126 | else | |
4127 | datap = (char *) ((addr_t) from->cda); | |
4128 | ||
4129 | /* dump data (max 32 bytes) */ | |
4130 | for (count = 0; count < from->count && count < 32; count++) { | |
4131 | if (count % 8 == 0) len += sprintf(page + len, " "); | |
4132 | if (count % 4 == 0) len += sprintf(page + len, " "); | |
4133 | len += sprintf(page + len, "%02x", datap[count]); | |
4134 | } | |
4135 | len += sprintf(page + len, "\n"); | |
4136 | from++; | |
4137 | } | |
4138 | return len; | |
4139 | } | |
4140 | ||
fc19f381 | 4141 | static void |
aeec92ca SH |
4142 | dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, |
4143 | char *reason) | |
fc19f381 SH |
4144 | { |
4145 | u64 *sense; | |
a5a0061f | 4146 | u64 *stat; |
aeec92ca SH |
4147 | |
4148 | sense = (u64 *) dasd_get_sense(irb); | |
a5a0061f | 4149 | stat = (u64 *) &irb->scsw; |
fc19f381 | 4150 | if (sense) { |
a5a0061f SW |
4151 | DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " |
4152 | "%016llx %016llx %016llx %016llx", | |
4153 | reason, *stat, *((u32 *) (stat + 1)), | |
ed3640b2 | 4154 | sense[0], sense[1], sense[2], sense[3]); |
fc19f381 | 4155 | } else { |
a5a0061f SW |
4156 | DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", |
4157 | reason, *stat, *((u32 *) (stat + 1)), | |
4158 | "NO VALID SENSE"); | |
fc19f381 SH |
4159 | } |
4160 | } | |
4161 | ||
1da177e4 LT |
4162 | /* |
4163 | * Print sense data and related channel program. | |
4164 | * Parts are printed because printk buffer is only 1024 bytes. | |
4165 | */ | |
f3eb5384 | 4166 | static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, |
8e09f215 | 4167 | struct dasd_ccw_req *req, struct irb *irb) |
1da177e4 LT |
4168 | { |
4169 | char *page; | |
445b5b49 HH |
4170 | struct ccw1 *first, *last, *fail, *from, *to; |
4171 | int len, sl, sct; | |
1da177e4 LT |
4172 | |
4173 | page = (char *) get_zeroed_page(GFP_ATOMIC); | |
4174 | if (page == NULL) { | |
fc19f381 SH |
4175 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
4176 | "No memory to dump sense data\n"); | |
1da177e4 LT |
4177 | return; |
4178 | } | |
445b5b49 | 4179 | /* dump the sense data */ |
773bab4a | 4180 | len = sprintf(page, PRINTK_HEADER |
1da177e4 | 4181 | " I/O status report for device %s:\n", |
2a0217d5 | 4182 | dev_name(&device->cdev->dev)); |
773bab4a | 4183 | len += sprintf(page + len, PRINTK_HEADER |
a5a0061f SW |
4184 | " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " |
4185 | "CS:%02X RC:%d\n", | |
4186 | req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), | |
4187 | scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), | |
4188 | scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), | |
4189 | req ? req->intrc : 0); | |
773bab4a | 4190 | len += sprintf(page + len, PRINTK_HEADER |
1da177e4 | 4191 | " device %s: Failing CCW: %p\n", |
2a0217d5 | 4192 | dev_name(&device->cdev->dev), |
23d805b6 | 4193 | (void *) (addr_t) irb->scsw.cmd.cpa); |
1da177e4 LT |
4194 | if (irb->esw.esw0.erw.cons) { |
4195 | for (sl = 0; sl < 4; sl++) { | |
773bab4a | 4196 | len += sprintf(page + len, PRINTK_HEADER |
1da177e4 LT |
4197 | " Sense(hex) %2d-%2d:", |
4198 | (8 * sl), ((8 * sl) + 7)); | |
4199 | ||
4200 | for (sct = 0; sct < 8; sct++) { | |
4201 | len += sprintf(page + len, " %02x", | |
4202 | irb->ecw[8 * sl + sct]); | |
4203 | } | |
4204 | len += sprintf(page + len, "\n"); | |
4205 | } | |
4206 | ||
4207 | if (irb->ecw[27] & DASD_SENSE_BIT_0) { | |
4208 | /* 24 Byte Sense Data */ | |
773bab4a | 4209 | sprintf(page + len, PRINTK_HEADER |
445b5b49 HH |
4210 | " 24 Byte: %x MSG %x, " |
4211 | "%s MSGb to SYSOP\n", | |
4212 | irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, | |
4213 | irb->ecw[1] & 0x10 ? "" : "no"); | |
1da177e4 LT |
4214 | } else { |
4215 | /* 32 Byte Sense Data */ | |
773bab4a | 4216 | sprintf(page + len, PRINTK_HEADER |
445b5b49 HH |
4217 | " 32 Byte: Format: %x " |
4218 | "Exception class %x\n", | |
4219 | irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); | |
1da177e4 LT |
4220 | } |
4221 | } else { | |
773bab4a | 4222 | sprintf(page + len, PRINTK_HEADER |
445b5b49 | 4223 | " SORRY - NO VALID SENSE AVAILABLE\n"); |
1da177e4 | 4224 | } |
773bab4a | 4225 | printk(KERN_ERR "%s", page); |
445b5b49 | 4226 | |
8e09f215 SW |
4227 | if (req) { |
4228 | /* req == NULL for unsolicited interrupts */ | |
4229 | /* dump the Channel Program (max 140 Bytes per line) */ | |
4230 | /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ | |
4231 | first = req->cpaddr; | |
4232 | for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); | |
4233 | to = min(first + 6, last); | |
773bab4a | 4234 | len = sprintf(page, PRINTK_HEADER |
8e09f215 SW |
4235 | " Related CP in req: %p\n", req); |
4236 | dasd_eckd_dump_ccw_range(first, to, page + len); | |
773bab4a | 4237 | printk(KERN_ERR "%s", page); |
1da177e4 | 4238 | |
8e09f215 SW |
4239 | /* print failing CCW area (maximum 4) */ |
4240 | /* scsw->cda is either valid or zero */ | |
4241 | len = 0; | |
4242 | from = ++to; | |
23d805b6 PO |
4243 | fail = (struct ccw1 *)(addr_t) |
4244 | irb->scsw.cmd.cpa; /* failing CCW */ | |
8e09f215 SW |
4245 | if (from < fail - 2) { |
4246 | from = fail - 2; /* there is a gap - print header */ | |
773bab4a | 4247 | len += sprintf(page, PRINTK_HEADER "......\n"); |
8e09f215 SW |
4248 | } |
4249 | to = min(fail + 1, last); | |
4250 | len += dasd_eckd_dump_ccw_range(from, to, page + len); | |
4251 | ||
4252 | /* print last CCWs (maximum 2) */ | |
4253 | from = max(from, ++to); | |
4254 | if (from < last - 1) { | |
4255 | from = last - 1; /* there is a gap - print header */ | |
773bab4a | 4256 | len += sprintf(page + len, PRINTK_HEADER "......\n"); |
8e09f215 SW |
4257 | } |
4258 | len += dasd_eckd_dump_ccw_range(from, last, page + len); | |
4259 | if (len > 0) | |
773bab4a | 4260 | printk(KERN_ERR "%s", page); |
1da177e4 | 4261 | } |
1da177e4 LT |
4262 | free_page((unsigned long) page); |
4263 | } | |
4264 | ||
f3eb5384 SW |
4265 | |
4266 | /* | |
4267 | * Print sense data from a tcw. | |
4268 | */ | |
4269 | static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, | |
4270 | struct dasd_ccw_req *req, struct irb *irb) | |
4271 | { | |
4272 | char *page; | |
4273 | int len, sl, sct, residual; | |
f3eb5384 | 4274 | struct tsb *tsb; |
ef19298b | 4275 | u8 *sense, *rcq; |
f3eb5384 SW |
4276 | |
4277 | page = (char *) get_zeroed_page(GFP_ATOMIC); | |
4278 | if (page == NULL) { | |
fc19f381 | 4279 | DBF_DEV_EVENT(DBF_WARNING, device, " %s", |
f3eb5384 SW |
4280 | "No memory to dump sense data"); |
4281 | return; | |
4282 | } | |
4283 | /* dump the sense data */ | |
773bab4a | 4284 | len = sprintf(page, PRINTK_HEADER |
f3eb5384 SW |
4285 | " I/O status report for device %s:\n", |
4286 | dev_name(&device->cdev->dev)); | |
773bab4a | 4287 | len += sprintf(page + len, PRINTK_HEADER |
a5a0061f SW |
4288 | " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " |
4289 | "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", | |
4290 | req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), | |
4291 | scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), | |
4292 | scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), | |
4293 | irb->scsw.tm.fcxs, irb->scsw.tm.schxs, | |
4294 | req ? req->intrc : 0); | |
773bab4a | 4295 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4296 | " device %s: Failing TCW: %p\n", |
4297 | dev_name(&device->cdev->dev), | |
4298 | (void *) (addr_t) irb->scsw.tm.tcw); | |
4299 | ||
4300 | tsb = NULL; | |
4301 | sense = NULL; | |
a5a0061f | 4302 | if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) |
f3eb5384 SW |
4303 | tsb = tcw_get_tsb( |
4304 | (struct tcw *)(unsigned long)irb->scsw.tm.tcw); | |
4305 | ||
b8fde722 | 4306 | if (tsb) { |
773bab4a | 4307 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 | 4308 | " tsb->length %d\n", tsb->length); |
773bab4a | 4309 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 | 4310 | " tsb->flags %x\n", tsb->flags); |
773bab4a | 4311 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 | 4312 | " tsb->dcw_offset %d\n", tsb->dcw_offset); |
773bab4a | 4313 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4314 | " tsb->count %d\n", tsb->count); |
4315 | residual = tsb->count - 28; | |
773bab4a | 4316 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4317 | " residual %d\n", residual); |
4318 | ||
4319 | switch (tsb->flags & 0x07) { | |
4320 | case 1: /* tsa_iostat */ | |
773bab4a | 4321 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4322 | " tsb->tsa.iostat.dev_time %d\n", |
4323 | tsb->tsa.iostat.dev_time); | |
773bab4a | 4324 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4325 | " tsb->tsa.iostat.def_time %d\n", |
4326 | tsb->tsa.iostat.def_time); | |
773bab4a | 4327 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4328 | " tsb->tsa.iostat.queue_time %d\n", |
4329 | tsb->tsa.iostat.queue_time); | |
773bab4a | 4330 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4331 | " tsb->tsa.iostat.dev_busy_time %d\n", |
4332 | tsb->tsa.iostat.dev_busy_time); | |
773bab4a | 4333 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4334 | " tsb->tsa.iostat.dev_act_time %d\n", |
4335 | tsb->tsa.iostat.dev_act_time); | |
4336 | sense = tsb->tsa.iostat.sense; | |
4337 | break; | |
4338 | case 2: /* ts_ddpc */ | |
773bab4a | 4339 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 | 4340 | " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); |
ef19298b | 4341 | for (sl = 0; sl < 2; sl++) { |
773bab4a | 4342 | len += sprintf(page + len, PRINTK_HEADER |
ef19298b SW |
4343 | " tsb->tsa.ddpc.rcq %2d-%2d: ", |
4344 | (8 * sl), ((8 * sl) + 7)); | |
4345 | rcq = tsb->tsa.ddpc.rcq; | |
f3eb5384 SW |
4346 | for (sct = 0; sct < 8; sct++) { |
4347 | len += sprintf(page + len, " %02x", | |
ef19298b | 4348 | rcq[8 * sl + sct]); |
f3eb5384 SW |
4349 | } |
4350 | len += sprintf(page + len, "\n"); | |
4351 | } | |
4352 | sense = tsb->tsa.ddpc.sense; | |
4353 | break; | |
4354 | case 3: /* tsa_intrg */ | |
773bab4a SO |
4355 | len += sprintf(page + len, PRINTK_HEADER |
4356 | " tsb->tsa.intrg.: not supportet yet\n"); | |
f3eb5384 SW |
4357 | break; |
4358 | } | |
4359 | ||
4360 | if (sense) { | |
4361 | for (sl = 0; sl < 4; sl++) { | |
773bab4a | 4362 | len += sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4363 | " Sense(hex) %2d-%2d:", |
4364 | (8 * sl), ((8 * sl) + 7)); | |
4365 | for (sct = 0; sct < 8; sct++) { | |
4366 | len += sprintf(page + len, " %02x", | |
4367 | sense[8 * sl + sct]); | |
4368 | } | |
4369 | len += sprintf(page + len, "\n"); | |
4370 | } | |
4371 | ||
4372 | if (sense[27] & DASD_SENSE_BIT_0) { | |
4373 | /* 24 Byte Sense Data */ | |
773bab4a | 4374 | sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4375 | " 24 Byte: %x MSG %x, " |
4376 | "%s MSGb to SYSOP\n", | |
4377 | sense[7] >> 4, sense[7] & 0x0f, | |
4378 | sense[1] & 0x10 ? "" : "no"); | |
4379 | } else { | |
4380 | /* 32 Byte Sense Data */ | |
773bab4a | 4381 | sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4382 | " 32 Byte: Format: %x " |
4383 | "Exception class %x\n", | |
4384 | sense[6] & 0x0f, sense[22] >> 4); | |
4385 | } | |
4386 | } else { | |
773bab4a | 4387 | sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4388 | " SORRY - NO VALID SENSE AVAILABLE\n"); |
4389 | } | |
4390 | } else { | |
773bab4a | 4391 | sprintf(page + len, PRINTK_HEADER |
f3eb5384 SW |
4392 | " SORRY - NO TSB DATA AVAILABLE\n"); |
4393 | } | |
773bab4a | 4394 | printk(KERN_ERR "%s", page); |
f3eb5384 SW |
4395 | free_page((unsigned long) page); |
4396 | } | |
4397 | ||
4398 | static void dasd_eckd_dump_sense(struct dasd_device *device, | |
4399 | struct dasd_ccw_req *req, struct irb *irb) | |
4400 | { | |
a5a0061f | 4401 | if (scsw_is_tm(&irb->scsw)) |
f3eb5384 SW |
4402 | dasd_eckd_dump_sense_tcw(device, req, irb); |
4403 | else | |
4404 | dasd_eckd_dump_sense_ccw(device, req, irb); | |
4405 | } | |
4406 | ||
501183f2 | 4407 | static int dasd_eckd_pm_freeze(struct dasd_device *device) |
d41dd122 SH |
4408 | { |
4409 | /* | |
4410 | * the device should be disconnected from our LCU structure | |
4411 | * on restore we will reconnect it and reread LCU specific | |
4412 | * information like PAV support that might have changed | |
4413 | */ | |
4414 | dasd_alias_remove_device(device); | |
4415 | dasd_alias_disconnect_device_from_lcu(device); | |
4416 | ||
4417 | return 0; | |
4418 | } | |
4419 | ||
501183f2 | 4420 | static int dasd_eckd_restore_device(struct dasd_device *device) |
d41dd122 | 4421 | { |
543691a4 | 4422 | struct dasd_eckd_private *private = device->private; |
6fca97a9 | 4423 | struct dasd_eckd_characteristics temp_rdc_data; |
f9f8d02f | 4424 | int rc; |
d41dd122 | 4425 | struct dasd_uid temp_uid; |
a7602f6c | 4426 | unsigned long flags; |
ea4da6ea | 4427 | unsigned long cqr_flags = 0; |
d41dd122 | 4428 | |
d41dd122 | 4429 | /* Read Configuration Data */ |
251afd69 SH |
4430 | rc = dasd_eckd_read_conf(device); |
4431 | if (rc) { | |
4432 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, | |
4433 | "Read configuration data failed, rc=%d", rc); | |
4434 | goto out_err; | |
4435 | } | |
d41dd122 | 4436 | |
2dedf0d9 SH |
4437 | dasd_eckd_get_uid(device, &temp_uid); |
4438 | /* Generate device unique id */ | |
4439 | rc = dasd_eckd_generate_uid(device); | |
4440 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); | |
d41dd122 | 4441 | if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) |
a7602f6c SH |
4442 | dev_err(&device->cdev->dev, "The UID of the DASD has " |
4443 | "changed\n"); | |
2dedf0d9 | 4444 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
d41dd122 SH |
4445 | if (rc) |
4446 | goto out_err; | |
d41dd122 SH |
4447 | |
4448 | /* register lcu with alias handling, enable PAV if this is a new lcu */ | |
f9f8d02f SH |
4449 | rc = dasd_alias_make_device_known_to_lcu(device); |
4450 | if (rc) | |
251afd69 | 4451 | goto out_err; |
ea4da6ea SH |
4452 | |
4453 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags); | |
4454 | dasd_eckd_validate_server(device, cqr_flags); | |
f4ac1d02 SW |
4455 | |
4456 | /* RE-Read Configuration Data */ | |
251afd69 SH |
4457 | rc = dasd_eckd_read_conf(device); |
4458 | if (rc) { | |
4459 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, | |
4460 | "Read configuration data failed, rc=%d", rc); | |
4461 | goto out_err2; | |
4462 | } | |
d41dd122 SH |
4463 | |
4464 | /* Read Feature Codes */ | |
68d1e5f0 | 4465 | dasd_eckd_read_features(device); |
d41dd122 SH |
4466 | |
4467 | /* Read Device Characteristics */ | |
68b781fe | 4468 | rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, |
6fca97a9 | 4469 | &temp_rdc_data, 64); |
d41dd122 | 4470 | if (rc) { |
b8ed5dd5 SH |
4471 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, |
4472 | "Read device characteristic failed, rc=%d", rc); | |
251afd69 | 4473 | goto out_err2; |
d41dd122 | 4474 | } |
a7602f6c | 4475 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); |
6fca97a9 | 4476 | memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); |
a7602f6c | 4477 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
d41dd122 SH |
4478 | |
4479 | /* add device to alias management */ | |
4480 | dasd_alias_add_device(device); | |
4481 | ||
4482 | return 0; | |
4483 | ||
251afd69 SH |
4484 | out_err2: |
4485 | dasd_alias_disconnect_device_from_lcu(device); | |
d41dd122 | 4486 | out_err: |
e6125fba | 4487 | return -1; |
d41dd122 SH |
4488 | } |
4489 | ||
501183f2 SH |
4490 | static int dasd_eckd_reload_device(struct dasd_device *device) |
4491 | { | |
543691a4 | 4492 | struct dasd_eckd_private *private = device->private; |
501183f2 | 4493 | int rc, old_base; |
2dedf0d9 SH |
4494 | char print_uid[60]; |
4495 | struct dasd_uid uid; | |
4496 | unsigned long flags; | |
501183f2 | 4497 | |
2dedf0d9 | 4498 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); |
501183f2 | 4499 | old_base = private->uid.base_unit_addr; |
2dedf0d9 SH |
4500 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
4501 | ||
501183f2 SH |
4502 | /* Read Configuration Data */ |
4503 | rc = dasd_eckd_read_conf(device); | |
4504 | if (rc) | |
4505 | goto out_err; | |
4506 | ||
2dedf0d9 | 4507 | rc = dasd_eckd_generate_uid(device); |
501183f2 SH |
4508 | if (rc) |
4509 | goto out_err; | |
501183f2 SH |
4510 | /* |
4511 | * update unit address configuration and | |
4512 | * add device to alias management | |
4513 | */ | |
4514 | dasd_alias_update_add_device(device); | |
4515 | ||
2dedf0d9 SH |
4516 | dasd_eckd_get_uid(device, &uid); |
4517 | ||
4518 | if (old_base != uid.base_unit_addr) { | |
4519 | if (strlen(uid.vduit) > 0) | |
4520 | snprintf(print_uid, sizeof(print_uid), | |
4521 | "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, | |
4522 | uid.ssid, uid.base_unit_addr, uid.vduit); | |
501183f2 | 4523 | else |
2dedf0d9 SH |
4524 | snprintf(print_uid, sizeof(print_uid), |
4525 | "%s.%s.%04x.%02x", uid.vendor, uid.serial, | |
4526 | uid.ssid, uid.base_unit_addr); | |
501183f2 SH |
4527 | |
4528 | dev_info(&device->cdev->dev, | |
4529 | "An Alias device was reassigned to a new base device " | |
2dedf0d9 | 4530 | "with UID: %s\n", print_uid); |
501183f2 SH |
4531 | } |
4532 | return 0; | |
4533 | ||
4534 | out_err: | |
4535 | return -1; | |
4536 | } | |
4537 | ||
5db8440c SH |
4538 | static int dasd_eckd_read_message_buffer(struct dasd_device *device, |
4539 | struct dasd_rssd_messages *messages, | |
4540 | __u8 lpum) | |
4541 | { | |
4542 | struct dasd_rssd_messages *message_buf; | |
4543 | struct dasd_psf_prssd_data *prssdp; | |
5db8440c SH |
4544 | struct dasd_ccw_req *cqr; |
4545 | struct ccw1 *ccw; | |
4546 | int rc; | |
4547 | ||
5db8440c SH |
4548 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, |
4549 | (sizeof(struct dasd_psf_prssd_data) + | |
4550 | sizeof(struct dasd_rssd_messages)), | |
4551 | device); | |
4552 | if (IS_ERR(cqr)) { | |
4553 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", | |
4554 | "Could not allocate read message buffer request"); | |
4555 | return PTR_ERR(cqr); | |
4556 | } | |
4557 | ||
4558 | cqr->startdev = device; | |
4559 | cqr->memdev = device; | |
4560 | cqr->block = NULL; | |
5db8440c | 4561 | cqr->expires = 10 * HZ; |
5db8440c | 4562 | set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); |
b179b037 SH |
4563 | /* dasd_sleep_on_immediatly does not do complex error |
4564 | * recovery so clear erp flag and set retry counter to | |
4565 | * do basic erp */ | |
4566 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); | |
4567 | cqr->retries = 256; | |
5db8440c SH |
4568 | |
4569 | /* Prepare for Read Subsystem Data */ | |
4570 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
4571 | memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); | |
4572 | prssdp->order = PSF_ORDER_PRSSD; | |
4573 | prssdp->suborder = 0x03; /* Message Buffer */ | |
4574 | /* all other bytes of prssdp must be zero */ | |
4575 | ||
4576 | ccw = cqr->cpaddr; | |
4577 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
4578 | ccw->count = sizeof(struct dasd_psf_prssd_data); | |
4579 | ccw->flags |= CCW_FLAG_CC; | |
4580 | ccw->flags |= CCW_FLAG_SLI; | |
4581 | ccw->cda = (__u32)(addr_t) prssdp; | |
4582 | ||
4583 | /* Read Subsystem Data - message buffer */ | |
4584 | message_buf = (struct dasd_rssd_messages *) (prssdp + 1); | |
4585 | memset(message_buf, 0, sizeof(struct dasd_rssd_messages)); | |
4586 | ||
4587 | ccw++; | |
4588 | ccw->cmd_code = DASD_ECKD_CCW_RSSD; | |
4589 | ccw->count = sizeof(struct dasd_rssd_messages); | |
4590 | ccw->flags |= CCW_FLAG_SLI; | |
4591 | ccw->cda = (__u32)(addr_t) message_buf; | |
4592 | ||
4593 | cqr->buildclk = get_tod_clock(); | |
4594 | cqr->status = DASD_CQR_FILLED; | |
4595 | rc = dasd_sleep_on_immediatly(cqr); | |
4596 | if (rc == 0) { | |
4597 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; | |
4598 | message_buf = (struct dasd_rssd_messages *) | |
4599 | (prssdp + 1); | |
4600 | memcpy(messages, message_buf, | |
4601 | sizeof(struct dasd_rssd_messages)); | |
4602 | } else | |
4603 | DBF_EVENT_DEVID(DBF_WARNING, device->cdev, | |
4604 | "Reading messages failed with rc=%d\n" | |
4605 | , rc); | |
4606 | dasd_sfree_request(cqr, cqr->memdev); | |
4607 | return rc; | |
4608 | } | |
4609 | ||
4610 | /* | |
4611 | * Perform Subsystem Function - CUIR response | |
4612 | */ | |
4613 | static int | |
4614 | dasd_eckd_psf_cuir_response(struct dasd_device *device, int response, | |
4615 | __u32 message_id, | |
4616 | struct channel_path_desc *desc, | |
4617 | struct subchannel_id sch_id) | |
4618 | { | |
4619 | struct dasd_psf_cuir_response *psf_cuir; | |
4620 | struct dasd_ccw_req *cqr; | |
4621 | struct ccw1 *ccw; | |
4622 | int rc; | |
4623 | ||
4624 | cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , | |
4625 | sizeof(struct dasd_psf_cuir_response), | |
4626 | device); | |
4627 | ||
4628 | if (IS_ERR(cqr)) { | |
4629 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", | |
4630 | "Could not allocate PSF-CUIR request"); | |
4631 | return PTR_ERR(cqr); | |
4632 | } | |
4633 | ||
4634 | psf_cuir = (struct dasd_psf_cuir_response *)cqr->data; | |
4635 | psf_cuir->order = PSF_ORDER_CUIR_RESPONSE; | |
4636 | psf_cuir->cc = response; | |
4637 | if (desc) | |
4638 | psf_cuir->chpid = desc->chpid; | |
4639 | psf_cuir->message_id = message_id; | |
4640 | psf_cuir->cssid = sch_id.cssid; | |
4641 | psf_cuir->ssid = sch_id.ssid; | |
5db8440c SH |
4642 | ccw = cqr->cpaddr; |
4643 | ccw->cmd_code = DASD_ECKD_CCW_PSF; | |
4644 | ccw->cda = (__u32)(addr_t)psf_cuir; | |
b179b037 | 4645 | ccw->flags = CCW_FLAG_SLI; |
5db8440c SH |
4646 | ccw->count = sizeof(struct dasd_psf_cuir_response); |
4647 | ||
4648 | cqr->startdev = device; | |
4649 | cqr->memdev = device; | |
4650 | cqr->block = NULL; | |
4651 | cqr->retries = 256; | |
4652 | cqr->expires = 10*HZ; | |
4653 | cqr->buildclk = get_tod_clock(); | |
4654 | cqr->status = DASD_CQR_FILLED; | |
b179b037 | 4655 | set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); |
5db8440c SH |
4656 | |
4657 | rc = dasd_sleep_on(cqr); | |
4658 | ||
4659 | dasd_sfree_request(cqr, cqr->memdev); | |
4660 | return rc; | |
4661 | } | |
4662 | ||
b179b037 SH |
4663 | /* |
4664 | * return configuration data that is referenced by record selector | |
4665 | * if a record selector is specified or per default return the | |
4666 | * conf_data pointer for the path specified by lpum | |
4667 | */ | |
4668 | static struct dasd_conf_data *dasd_eckd_get_ref_conf(struct dasd_device *device, | |
4669 | __u8 lpum, | |
4670 | struct dasd_cuir_message *cuir) | |
5db8440c | 4671 | { |
543691a4 | 4672 | struct dasd_eckd_private *private = device->private; |
b179b037 SH |
4673 | struct dasd_conf_data *conf_data; |
4674 | int path, pos; | |
5db8440c | 4675 | |
b179b037 SH |
4676 | if (cuir->record_selector == 0) |
4677 | goto out; | |
4678 | for (path = 0x80, pos = 0; path; path >>= 1, pos++) { | |
4679 | conf_data = private->path_conf_data[pos]; | |
4680 | if (conf_data->gneq.record_selector == | |
4681 | cuir->record_selector) | |
4682 | return conf_data; | |
5db8440c | 4683 | } |
b179b037 | 4684 | out: |
9d49f86d | 4685 | return private->path_conf_data[pathmask_to_pos(lpum)]; |
5db8440c SH |
4686 | } |
4687 | ||
4688 | /* | |
b179b037 SH |
4689 | * This function determines the scope of a reconfiguration request by |
4690 | * analysing the path and device selection data provided in the CUIR request. | |
4691 | * Returns a path mask containing CUIR affected paths for the give device. | |
4692 | * | |
4693 | * If the CUIR request does not contain the required information return the | |
4694 | * path mask of the path the attention message for the CUIR request was reveived | |
4695 | * on. | |
4696 | */ | |
4697 | static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum, | |
4698 | struct dasd_cuir_message *cuir) | |
4699 | { | |
543691a4 | 4700 | struct dasd_eckd_private *private = device->private; |
b179b037 SH |
4701 | struct dasd_conf_data *ref_conf_data; |
4702 | unsigned long bitmask = 0, mask = 0; | |
b179b037 SH |
4703 | struct dasd_conf_data *conf_data; |
4704 | unsigned int pos, path; | |
4705 | char *ref_gneq, *gneq; | |
4706 | char *ref_ned, *ned; | |
4707 | int tbcpm = 0; | |
4708 | ||
4709 | /* if CUIR request does not specify the scope use the path | |
4710 | the attention message was presented on */ | |
4711 | if (!cuir->ned_map || | |
4712 | !(cuir->neq_map[0] | cuir->neq_map[1] | cuir->neq_map[2])) | |
4713 | return lpum; | |
4714 | ||
b179b037 SH |
4715 | /* get reference conf data */ |
4716 | ref_conf_data = dasd_eckd_get_ref_conf(device, lpum, cuir); | |
4717 | /* reference ned is determined by ned_map field */ | |
4718 | pos = 8 - ffs(cuir->ned_map); | |
4719 | ref_ned = (char *)&ref_conf_data->neds[pos]; | |
4720 | ref_gneq = (char *)&ref_conf_data->gneq; | |
4721 | /* transfer 24 bit neq_map to mask */ | |
4722 | mask = cuir->neq_map[2]; | |
4723 | mask |= cuir->neq_map[1] << 8; | |
4724 | mask |= cuir->neq_map[0] << 16; | |
4725 | ||
4726 | for (path = 0x80; path; path >>= 1) { | |
4727 | /* initialise data per path */ | |
4728 | bitmask = mask; | |
9d49f86d | 4729 | pos = pathmask_to_pos(path); |
b179b037 SH |
4730 | conf_data = private->path_conf_data[pos]; |
4731 | pos = 8 - ffs(cuir->ned_map); | |
4732 | ned = (char *) &conf_data->neds[pos]; | |
4733 | /* compare reference ned and per path ned */ | |
4734 | if (memcmp(ref_ned, ned, sizeof(*ned)) != 0) | |
4735 | continue; | |
4736 | gneq = (char *)&conf_data->gneq; | |
4737 | /* compare reference gneq and per_path gneq under | |
4738 | 24 bit mask where mask bit 0 equals byte 7 of | |
4739 | the gneq and mask bit 24 equals byte 31 */ | |
4740 | while (bitmask) { | |
4741 | pos = ffs(bitmask) - 1; | |
4742 | if (memcmp(&ref_gneq[31 - pos], &gneq[31 - pos], 1) | |
4743 | != 0) | |
4744 | break; | |
4745 | clear_bit(pos, &bitmask); | |
4746 | } | |
4747 | if (bitmask) | |
4748 | continue; | |
4749 | /* device and path match the reference values | |
4750 | add path to CUIR scope */ | |
4751 | tbcpm |= path; | |
4752 | } | |
4753 | return tbcpm; | |
4754 | } | |
4755 | ||
4756 | static void dasd_eckd_cuir_notify_user(struct dasd_device *device, | |
4757 | unsigned long paths, | |
4758 | struct subchannel_id sch_id, int action) | |
4759 | { | |
4760 | struct channel_path_desc *desc; | |
4761 | int pos; | |
4762 | ||
4763 | while (paths) { | |
4764 | /* get position of bit in mask */ | |
4765 | pos = ffs(paths) - 1; | |
4766 | /* get channel path descriptor from this position */ | |
4767 | desc = ccw_device_get_chp_desc(device->cdev, 7 - pos); | |
4768 | if (action == CUIR_QUIESCE) | |
4769 | pr_warn("Service on the storage server caused path " | |
4770 | "%x.%02x to go offline", sch_id.cssid, | |
4771 | desc ? desc->chpid : 0); | |
4772 | else if (action == CUIR_RESUME) | |
4773 | pr_info("Path %x.%02x is back online after service " | |
4774 | "on the storage server", sch_id.cssid, | |
4775 | desc ? desc->chpid : 0); | |
4776 | kfree(desc); | |
4777 | clear_bit(pos, &paths); | |
4778 | } | |
4779 | } | |
4780 | ||
4781 | static int dasd_eckd_cuir_remove_path(struct dasd_device *device, __u8 lpum, | |
4782 | struct dasd_cuir_message *cuir) | |
4783 | { | |
4784 | unsigned long tbcpm; | |
4785 | ||
4786 | tbcpm = dasd_eckd_cuir_scope(device, lpum, cuir); | |
4787 | /* nothing to do if path is not in use */ | |
4788 | if (!(device->path_data.opm & tbcpm)) | |
4789 | return 0; | |
4790 | if (!(device->path_data.opm & ~tbcpm)) { | |
4791 | /* no path would be left if the CUIR action is taken | |
4792 | return error */ | |
4793 | return -EINVAL; | |
4794 | } | |
4795 | /* remove device from operational path mask */ | |
4796 | device->path_data.opm &= ~tbcpm; | |
4797 | device->path_data.cuirpm |= tbcpm; | |
4798 | return tbcpm; | |
4799 | } | |
4800 | ||
4801 | /* | |
4802 | * walk through all devices and build a path mask to quiesce them | |
4803 | * return an error if the last path to a device would be removed | |
5db8440c SH |
4804 | * |
4805 | * if only part of the devices are quiesced and an error | |
4806 | * occurs no onlining necessary, the storage server will | |
4807 | * notify the already set offline devices again | |
4808 | */ | |
4809 | static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum, | |
b179b037 SH |
4810 | struct subchannel_id sch_id, |
4811 | struct dasd_cuir_message *cuir) | |
5db8440c | 4812 | { |
543691a4 | 4813 | struct dasd_eckd_private *private = device->private; |
5db8440c | 4814 | struct alias_pav_group *pavgroup, *tempgroup; |
5db8440c | 4815 | struct dasd_device *dev, *n; |
b179b037 SH |
4816 | unsigned long paths = 0; |
4817 | unsigned long flags; | |
4818 | int tbcpm; | |
5db8440c | 4819 | |
5db8440c | 4820 | /* active devices */ |
b179b037 | 4821 | list_for_each_entry_safe(dev, n, &private->lcu->active_devices, |
5db8440c | 4822 | alias_list) { |
b179b037 SH |
4823 | spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); |
4824 | tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); | |
4825 | spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); | |
4826 | if (tbcpm < 0) | |
4827 | goto out_err; | |
4828 | paths |= tbcpm; | |
5db8440c | 4829 | } |
5db8440c | 4830 | /* inactive devices */ |
b179b037 | 4831 | list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, |
5db8440c | 4832 | alias_list) { |
b179b037 SH |
4833 | spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); |
4834 | tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); | |
4835 | spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); | |
4836 | if (tbcpm < 0) | |
4837 | goto out_err; | |
4838 | paths |= tbcpm; | |
5db8440c | 4839 | } |
5db8440c SH |
4840 | /* devices in PAV groups */ |
4841 | list_for_each_entry_safe(pavgroup, tempgroup, | |
4842 | &private->lcu->grouplist, group) { | |
4843 | list_for_each_entry_safe(dev, n, &pavgroup->baselist, | |
4844 | alias_list) { | |
b179b037 SH |
4845 | spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); |
4846 | tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); | |
4847 | spin_unlock_irqrestore( | |
4848 | get_ccwdev_lock(dev->cdev), flags); | |
4849 | if (tbcpm < 0) | |
4850 | goto out_err; | |
4851 | paths |= tbcpm; | |
5db8440c SH |
4852 | } |
4853 | list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, | |
4854 | alias_list) { | |
b179b037 SH |
4855 | spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); |
4856 | tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); | |
4857 | spin_unlock_irqrestore( | |
4858 | get_ccwdev_lock(dev->cdev), flags); | |
4859 | if (tbcpm < 0) | |
4860 | goto out_err; | |
4861 | paths |= tbcpm; | |
5db8440c SH |
4862 | } |
4863 | } | |
b179b037 SH |
4864 | /* notify user about all paths affected by CUIR action */ |
4865 | dasd_eckd_cuir_notify_user(device, paths, sch_id, CUIR_QUIESCE); | |
4866 | return 0; | |
4867 | out_err: | |
4868 | return tbcpm; | |
5db8440c SH |
4869 | } |
4870 | ||
4871 | static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum, | |
b179b037 SH |
4872 | struct subchannel_id sch_id, |
4873 | struct dasd_cuir_message *cuir) | |
5db8440c | 4874 | { |
543691a4 | 4875 | struct dasd_eckd_private *private = device->private; |
5db8440c | 4876 | struct alias_pav_group *pavgroup, *tempgroup; |
5db8440c | 4877 | struct dasd_device *dev, *n; |
b179b037 SH |
4878 | unsigned long paths = 0; |
4879 | int tbcpm; | |
5db8440c | 4880 | |
5db8440c SH |
4881 | /* |
4882 | * the path may have been added through a generic path event before | |
4883 | * only trigger path verification if the path is not already in use | |
4884 | */ | |
5db8440c SH |
4885 | list_for_each_entry_safe(dev, n, |
4886 | &private->lcu->active_devices, | |
4887 | alias_list) { | |
b179b037 SH |
4888 | tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); |
4889 | paths |= tbcpm; | |
4890 | if (!(dev->path_data.opm & tbcpm)) { | |
4891 | dev->path_data.tbvpm |= tbcpm; | |
5db8440c SH |
4892 | dasd_schedule_device_bh(dev); |
4893 | } | |
4894 | } | |
5db8440c SH |
4895 | list_for_each_entry_safe(dev, n, |
4896 | &private->lcu->inactive_devices, | |
4897 | alias_list) { | |
b179b037 SH |
4898 | tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); |
4899 | paths |= tbcpm; | |
4900 | if (!(dev->path_data.opm & tbcpm)) { | |
4901 | dev->path_data.tbvpm |= tbcpm; | |
5db8440c SH |
4902 | dasd_schedule_device_bh(dev); |
4903 | } | |
4904 | } | |
5db8440c SH |
4905 | /* devices in PAV groups */ |
4906 | list_for_each_entry_safe(pavgroup, tempgroup, | |
4907 | &private->lcu->grouplist, | |
4908 | group) { | |
4909 | list_for_each_entry_safe(dev, n, | |
4910 | &pavgroup->baselist, | |
4911 | alias_list) { | |
b179b037 SH |
4912 | tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); |
4913 | paths |= tbcpm; | |
4914 | if (!(dev->path_data.opm & tbcpm)) { | |
4915 | dev->path_data.tbvpm |= tbcpm; | |
5db8440c SH |
4916 | dasd_schedule_device_bh(dev); |
4917 | } | |
4918 | } | |
4919 | list_for_each_entry_safe(dev, n, | |
4920 | &pavgroup->aliaslist, | |
4921 | alias_list) { | |
b179b037 SH |
4922 | tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); |
4923 | paths |= tbcpm; | |
4924 | if (!(dev->path_data.opm & tbcpm)) { | |
4925 | dev->path_data.tbvpm |= tbcpm; | |
5db8440c SH |
4926 | dasd_schedule_device_bh(dev); |
4927 | } | |
4928 | } | |
4929 | } | |
b179b037 SH |
4930 | /* notify user about all paths affected by CUIR action */ |
4931 | dasd_eckd_cuir_notify_user(device, paths, sch_id, CUIR_RESUME); | |
4932 | return 0; | |
5db8440c SH |
4933 | } |
4934 | ||
4935 | static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages, | |
4936 | __u8 lpum) | |
4937 | { | |
4938 | struct dasd_cuir_message *cuir = messages; | |
4939 | struct channel_path_desc *desc; | |
4940 | struct subchannel_id sch_id; | |
4941 | int pos, response; | |
5db8440c | 4942 | |
b179b037 SH |
4943 | DBF_DEV_EVENT(DBF_WARNING, device, |
4944 | "CUIR request: %016llx %016llx %016llx %08x", | |
4945 | ((u64 *)cuir)[0], ((u64 *)cuir)[1], ((u64 *)cuir)[2], | |
4946 | ((u32 *)cuir)[3]); | |
4947 | ccw_device_get_schid(device->cdev, &sch_id); | |
9d49f86d | 4948 | pos = pathmask_to_pos(lpum); |
5db8440c SH |
4949 | desc = ccw_device_get_chp_desc(device->cdev, pos); |
4950 | ||
4951 | if (cuir->code == CUIR_QUIESCE) { | |
4952 | /* quiesce */ | |
b179b037 SH |
4953 | if (dasd_eckd_cuir_quiesce(device, lpum, sch_id, cuir)) |
4954 | response = PSF_CUIR_LAST_PATH; | |
4955 | else | |
4956 | response = PSF_CUIR_COMPLETED; | |
5db8440c SH |
4957 | } else if (cuir->code == CUIR_RESUME) { |
4958 | /* resume */ | |
b179b037 SH |
4959 | dasd_eckd_cuir_resume(device, lpum, sch_id, cuir); |
4960 | response = PSF_CUIR_COMPLETED; | |
5db8440c SH |
4961 | } else |
4962 | response = PSF_CUIR_NOT_SUPPORTED; | |
4963 | ||
b179b037 SH |
4964 | dasd_eckd_psf_cuir_response(device, response, |
4965 | cuir->message_id, desc, sch_id); | |
4966 | DBF_DEV_EVENT(DBF_WARNING, device, | |
4967 | "CUIR response: %d on message ID %08x", response, | |
4968 | cuir->message_id); | |
5db8440c SH |
4969 | /* free descriptor copy */ |
4970 | kfree(desc); | |
b179b037 SH |
4971 | /* to make sure there is no attention left schedule work again */ |
4972 | device->discipline->check_attention(device, lpum); | |
5db8440c SH |
4973 | } |
4974 | ||
4975 | static void dasd_eckd_check_attention_work(struct work_struct *work) | |
4976 | { | |
4977 | struct check_attention_work_data *data; | |
4978 | struct dasd_rssd_messages *messages; | |
4979 | struct dasd_device *device; | |
4980 | int rc; | |
4981 | ||
4982 | data = container_of(work, struct check_attention_work_data, worker); | |
4983 | device = data->device; | |
5db8440c SH |
4984 | messages = kzalloc(sizeof(*messages), GFP_KERNEL); |
4985 | if (!messages) { | |
4986 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", | |
4987 | "Could not allocate attention message buffer"); | |
4988 | goto out; | |
4989 | } | |
5db8440c SH |
4990 | rc = dasd_eckd_read_message_buffer(device, messages, data->lpum); |
4991 | if (rc) | |
4992 | goto out; | |
5db8440c SH |
4993 | if (messages->length == ATTENTION_LENGTH_CUIR && |
4994 | messages->format == ATTENTION_FORMAT_CUIR) | |
4995 | dasd_eckd_handle_cuir(device, messages, data->lpum); | |
5db8440c SH |
4996 | out: |
4997 | dasd_put_device(device); | |
4998 | kfree(messages); | |
4999 | kfree(data); | |
5000 | } | |
5001 | ||
5002 | static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum) | |
5003 | { | |
5004 | struct check_attention_work_data *data; | |
5005 | ||
5006 | data = kzalloc(sizeof(*data), GFP_ATOMIC); | |
5007 | if (!data) | |
5008 | return -ENOMEM; | |
5009 | INIT_WORK(&data->worker, dasd_eckd_check_attention_work); | |
5010 | dasd_get_device(device); | |
5011 | data->device = device; | |
5012 | data->lpum = lpum; | |
5013 | schedule_work(&data->worker); | |
5014 | return 0; | |
5015 | } | |
5016 | ||
d41dd122 | 5017 | static struct ccw_driver dasd_eckd_driver = { |
3bda058b SO |
5018 | .driver = { |
5019 | .name = "dasd-eckd", | |
5020 | .owner = THIS_MODULE, | |
5021 | }, | |
d41dd122 SH |
5022 | .ids = dasd_eckd_ids, |
5023 | .probe = dasd_eckd_probe, | |
5024 | .remove = dasd_generic_remove, | |
5025 | .set_offline = dasd_generic_set_offline, | |
5026 | .set_online = dasd_eckd_set_online, | |
5027 | .notify = dasd_generic_notify, | |
a4d26c6a | 5028 | .path_event = dasd_generic_path_event, |
4679e893 | 5029 | .shutdown = dasd_generic_shutdown, |
d41dd122 SH |
5030 | .freeze = dasd_generic_pm_freeze, |
5031 | .thaw = dasd_generic_restore_device, | |
5032 | .restore = dasd_generic_restore_device, | |
a23ed009 | 5033 | .uc_handler = dasd_generic_uc_handler, |
420f42ec | 5034 | .int_class = IRQIO_DAS, |
d41dd122 | 5035 | }; |
f3eb5384 | 5036 | |
1da177e4 LT |
5037 | /* |
5038 | * max_blocks is dependent on the amount of storage that is available | |
5039 | * in the static io buffer for each device. Currently each device has | |
5040 | * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has | |
5041 | * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use | |
5042 | * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In | |
5043 | * addition we have one define extent ccw + 16 bytes of data and one | |
5044 | * locate record ccw + 16 bytes of data. That makes: | |
5045 | * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. | |
5046 | * We want to fit two into the available memory so that we can immediately | |
5047 | * start the next request if one finishes off. That makes 249.5 blocks | |
5048 | * for one request. Give a little safety and the result is 240. | |
5049 | */ | |
5050 | static struct dasd_discipline dasd_eckd_discipline = { | |
5051 | .owner = THIS_MODULE, | |
5052 | .name = "ECKD", | |
5053 | .ebcname = "ECKD", | |
ef19298b | 5054 | .max_blocks = 190, |
1da177e4 | 5055 | .check_device = dasd_eckd_check_characteristics, |
8e09f215 | 5056 | .uncheck_device = dasd_eckd_uncheck_device, |
1da177e4 | 5057 | .do_analysis = dasd_eckd_do_analysis, |
a4d26c6a | 5058 | .verify_path = dasd_eckd_verify_path, |
d42e1712 | 5059 | .basic_to_ready = dasd_eckd_basic_to_ready, |
8e09f215 | 5060 | .online_to_ready = dasd_eckd_online_to_ready, |
daa991bf | 5061 | .basic_to_known = dasd_eckd_basic_to_known, |
1da177e4 LT |
5062 | .fill_geometry = dasd_eckd_fill_geometry, |
5063 | .start_IO = dasd_start_IO, | |
5064 | .term_IO = dasd_term_IO, | |
8e09f215 | 5065 | .handle_terminated_request = dasd_eckd_handle_terminated_request, |
1da177e4 | 5066 | .format_device = dasd_eckd_format_device, |
1da177e4 LT |
5067 | .erp_action = dasd_eckd_erp_action, |
5068 | .erp_postaction = dasd_eckd_erp_postaction, | |
5a27e60d | 5069 | .check_for_device_change = dasd_eckd_check_for_device_change, |
8e09f215 SW |
5070 | .build_cp = dasd_eckd_build_alias_cp, |
5071 | .free_cp = dasd_eckd_free_alias_cp, | |
1da177e4 | 5072 | .dump_sense = dasd_eckd_dump_sense, |
fc19f381 | 5073 | .dump_sense_dbf = dasd_eckd_dump_sense_dbf, |
1da177e4 | 5074 | .fill_info = dasd_eckd_fill_info, |
1107ccfb | 5075 | .ioctl = dasd_eckd_ioctl, |
d41dd122 SH |
5076 | .freeze = dasd_eckd_pm_freeze, |
5077 | .restore = dasd_eckd_restore_device, | |
501183f2 | 5078 | .reload = dasd_eckd_reload_device, |
2dedf0d9 | 5079 | .get_uid = dasd_eckd_get_uid, |
f1633031 | 5080 | .kick_validate = dasd_eckd_kick_validate_server, |
5db8440c | 5081 | .check_attention = dasd_eckd_check_attention, |
1da177e4 LT |
5082 | }; |
5083 | ||
5084 | static int __init | |
5085 | dasd_eckd_init(void) | |
5086 | { | |
736e6ea0 SO |
5087 | int ret; |
5088 | ||
1da177e4 | 5089 | ASCEBC(dasd_eckd_discipline.ebcname, 4); |
f932bcea SW |
5090 | dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), |
5091 | GFP_KERNEL | GFP_DMA); | |
5092 | if (!dasd_reserve_req) | |
5093 | return -ENOMEM; | |
a4d26c6a SW |
5094 | path_verification_worker = kmalloc(sizeof(*path_verification_worker), |
5095 | GFP_KERNEL | GFP_DMA); | |
5096 | if (!path_verification_worker) { | |
5097 | kfree(dasd_reserve_req); | |
5098 | return -ENOMEM; | |
5099 | } | |
558b9ef0 SW |
5100 | rawpadpage = (void *)__get_free_page(GFP_KERNEL); |
5101 | if (!rawpadpage) { | |
5102 | kfree(path_verification_worker); | |
5103 | kfree(dasd_reserve_req); | |
5104 | return -ENOMEM; | |
5105 | } | |
736e6ea0 SO |
5106 | ret = ccw_driver_register(&dasd_eckd_driver); |
5107 | if (!ret) | |
5108 | wait_for_device_probe(); | |
a4d26c6a SW |
5109 | else { |
5110 | kfree(path_verification_worker); | |
f932bcea | 5111 | kfree(dasd_reserve_req); |
558b9ef0 | 5112 | free_page((unsigned long)rawpadpage); |
a4d26c6a | 5113 | } |
736e6ea0 | 5114 | return ret; |
1da177e4 LT |
5115 | } |
5116 | ||
5117 | static void __exit | |
5118 | dasd_eckd_cleanup(void) | |
5119 | { | |
5120 | ccw_driver_unregister(&dasd_eckd_driver); | |
a4d26c6a | 5121 | kfree(path_verification_worker); |
f932bcea | 5122 | kfree(dasd_reserve_req); |
558b9ef0 | 5123 | free_page((unsigned long)rawpadpage); |
1da177e4 LT |
5124 | } |
5125 | ||
5126 | module_init(dasd_eckd_init); | |
5127 | module_exit(dasd_eckd_cleanup); |