Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 | 2 | * S/390 common I/O routines -- channel subsystem call |
1da177e4 | 3 | * |
a53c8fab | 4 | * Copyright IBM Corp. 1999, 2010 |
1da177e4 | 5 | * Author(s): Ingo Adlung (adlung@de.ibm.com) |
4ce3b30c | 6 | * Cornelia Huck (cornelia.huck@de.ibm.com) |
1da177e4 LT |
7 | * Arnd Bergmann (arndb@de.ibm.com) |
8 | */ | |
9 | ||
e6d5a428 ME |
10 | #define KMSG_COMPONENT "cio" |
11 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
12 | ||
1da177e4 | 13 | #include <linux/module.h> |
1da177e4 LT |
14 | #include <linux/slab.h> |
15 | #include <linux/init.h> | |
16 | #include <linux/device.h> | |
17 | ||
18 | #include <asm/cio.h> | |
e5854a58 | 19 | #include <asm/chpid.h> |
9d92a7e1 | 20 | #include <asm/chsc.h> |
f5daba1d | 21 | #include <asm/crw.h> |
1da177e4 LT |
22 | |
23 | #include "css.h" | |
24 | #include "cio.h" | |
25 | #include "cio_debug.h" | |
26 | #include "ioasm.h" | |
e6b6e10a | 27 | #include "chp.h" |
1da177e4 LT |
28 | #include "chsc.h" |
29 | ||
1da177e4 | 30 | static void *sei_page; |
34196f82 SO |
31 | static void *chsc_page; |
32 | static DEFINE_SPINLOCK(chsc_page_lock); | |
1da177e4 | 33 | |
dae39843 CH |
34 | /** |
35 | * chsc_error_from_response() - convert a chsc response to an error | |
36 | * @response: chsc response code | |
37 | * | |
38 | * Returns an appropriate Linux error code for @response. | |
39 | */ | |
40 | int chsc_error_from_response(int response) | |
b9c9a21a CH |
41 | { |
42 | switch (response) { | |
43 | case 0x0001: | |
44 | return 0; | |
45 | case 0x0002: | |
46 | case 0x0003: | |
47 | case 0x0006: | |
48 | case 0x0007: | |
49 | case 0x0008: | |
50 | case 0x000a: | |
fd0457a6 | 51 | case 0x0104: |
b9c9a21a CH |
52 | return -EINVAL; |
53 | case 0x0004: | |
54 | return -EOPNOTSUPP; | |
55 | default: | |
56 | return -EIO; | |
57 | } | |
58 | } | |
dae39843 | 59 | EXPORT_SYMBOL_GPL(chsc_error_from_response); |
b9c9a21a | 60 | |
7ad6a249 PO |
61 | struct chsc_ssd_area { |
62 | struct chsc_header request; | |
63 | u16 :10; | |
64 | u16 ssid:2; | |
65 | u16 :4; | |
66 | u16 f_sch; /* first subchannel */ | |
67 | u16 :16; | |
68 | u16 l_sch; /* last subchannel */ | |
69 | u32 :32; | |
70 | struct chsc_header response; | |
71 | u32 :32; | |
72 | u8 sch_valid : 1; | |
73 | u8 dev_valid : 1; | |
74 | u8 st : 3; /* subchannel type */ | |
75 | u8 zeroes : 3; | |
76 | u8 unit_addr; /* unit address */ | |
77 | u16 devno; /* device number */ | |
78 | u8 path_mask; | |
79 | u8 fla_valid_mask; | |
80 | u16 sch; /* subchannel */ | |
81 | u8 chpid[8]; /* chpids 0-7 */ | |
82 | u16 fla[8]; /* full link addresses 0-7 */ | |
83 | } __attribute__ ((packed)); | |
84 | ||
85 | int chsc_get_ssd_info(struct subchannel_id schid, struct chsc_ssd_info *ssd) | |
1da177e4 | 86 | { |
7ad6a249 PO |
87 | struct chsc_ssd_area *ssd_area; |
88 | int ccode; | |
89 | int ret; | |
90 | int i; | |
91 | int mask; | |
1da177e4 | 92 | |
34196f82 SO |
93 | spin_lock_irq(&chsc_page_lock); |
94 | memset(chsc_page, 0, PAGE_SIZE); | |
95 | ssd_area = chsc_page; | |
495a5b45 CH |
96 | ssd_area->request.length = 0x0010; |
97 | ssd_area->request.code = 0x0004; | |
7ad6a249 PO |
98 | ssd_area->ssid = schid.ssid; |
99 | ssd_area->f_sch = schid.sch_no; | |
100 | ssd_area->l_sch = schid.sch_no; | |
1da177e4 LT |
101 | |
102 | ccode = chsc(ssd_area); | |
7ad6a249 | 103 | /* Check response. */ |
1da177e4 | 104 | if (ccode > 0) { |
7ad6a249 | 105 | ret = (ccode == 3) ? -ENODEV : -EBUSY; |
34196f82 | 106 | goto out; |
1da177e4 | 107 | } |
b9c9a21a CH |
108 | ret = chsc_error_from_response(ssd_area->response.code); |
109 | if (ret != 0) { | |
7ad6a249 PO |
110 | CIO_MSG_EVENT(2, "chsc: ssd failed for 0.%x.%04x (rc=%04x)\n", |
111 | schid.ssid, schid.sch_no, | |
1da177e4 | 112 | ssd_area->response.code); |
34196f82 | 113 | goto out; |
1da177e4 | 114 | } |
7ad6a249 PO |
115 | if (!ssd_area->sch_valid) { |
116 | ret = -ENODEV; | |
34196f82 | 117 | goto out; |
1da177e4 | 118 | } |
7ad6a249 PO |
119 | /* Copy data */ |
120 | ret = 0; | |
121 | memset(ssd, 0, sizeof(struct chsc_ssd_info)); | |
b279a4f5 CH |
122 | if ((ssd_area->st != SUBCHANNEL_TYPE_IO) && |
123 | (ssd_area->st != SUBCHANNEL_TYPE_MSG)) | |
34196f82 | 124 | goto out; |
7ad6a249 PO |
125 | ssd->path_mask = ssd_area->path_mask; |
126 | ssd->fla_valid_mask = ssd_area->fla_valid_mask; | |
127 | for (i = 0; i < 8; i++) { | |
128 | mask = 0x80 >> i; | |
129 | if (ssd_area->path_mask & mask) { | |
130 | chp_id_init(&ssd->chpid[i]); | |
131 | ssd->chpid[i].id = ssd_area->chpid[i]; | |
1da177e4 | 132 | } |
7ad6a249 PO |
133 | if (ssd_area->fla_valid_mask & mask) |
134 | ssd->fla[i] = ssd_area->fla[i]; | |
1da177e4 | 135 | } |
34196f82 SO |
136 | out: |
137 | spin_unlock_irq(&chsc_page_lock); | |
1da177e4 LT |
138 | return ret; |
139 | } | |
140 | ||
e82a1567 | 141 | static int s390_subchannel_remove_chpid(struct subchannel *sch, void *data) |
1da177e4 | 142 | { |
2ec22984 | 143 | spin_lock_irq(sch->lock); |
c820de39 CH |
144 | if (sch->driver && sch->driver->chp_event) |
145 | if (sch->driver->chp_event(sch, data, CHP_OFFLINE) != 0) | |
1da177e4 | 146 | goto out_unreg; |
2ec22984 | 147 | spin_unlock_irq(sch->lock); |
1da177e4 | 148 | return 0; |
387b734f | 149 | |
1da177e4 | 150 | out_unreg: |
1da177e4 | 151 | sch->lpm = 0; |
387b734f | 152 | spin_unlock_irq(sch->lock); |
83b3370c | 153 | css_schedule_eval(sch->schid); |
1da177e4 LT |
154 | return 0; |
155 | } | |
156 | ||
e6b6e10a | 157 | void chsc_chp_offline(struct chp_id chpid) |
1da177e4 LT |
158 | { |
159 | char dbf_txt[15]; | |
99611f87 | 160 | struct chp_link link; |
1da177e4 | 161 | |
f86635fa | 162 | sprintf(dbf_txt, "chpr%x.%02x", chpid.cssid, chpid.id); |
1da177e4 LT |
163 | CIO_TRACE_EVENT(2, dbf_txt); |
164 | ||
e6b6e10a | 165 | if (chp_get_status(chpid) <= 0) |
1da177e4 | 166 | return; |
99611f87 CH |
167 | memset(&link, 0, sizeof(struct chp_link)); |
168 | link.chpid = chpid; | |
22806dc1 CH |
169 | /* Wait until previous actions have settled. */ |
170 | css_wait_for_slow_path(); | |
99611f87 | 171 | for_each_subchannel_staged(s390_subchannel_remove_chpid, NULL, &link); |
1da177e4 LT |
172 | } |
173 | ||
e82a1567 | 174 | static int s390_process_res_acc_new_sch(struct subchannel_id schid, void *data) |
f97a56fb CH |
175 | { |
176 | struct schib schib; | |
f97a56fb CH |
177 | /* |
178 | * We don't know the device yet, but since a path | |
179 | * may be available now to the device we'll have | |
180 | * to do recognition again. | |
181 | * Since we don't have any idea about which chpid | |
182 | * that beast may be on we'll have to do a stsch | |
183 | * on all devices, grr... | |
184 | */ | |
fb6958a5 | 185 | if (stsch_err(schid, &schib)) |
f97a56fb | 186 | /* We're through */ |
83b3370c | 187 | return -ENXIO; |
f97a56fb CH |
188 | |
189 | /* Put it on the slow path. */ | |
83b3370c | 190 | css_schedule_eval(schid); |
f97a56fb CH |
191 | return 0; |
192 | } | |
193 | ||
e82a1567 | 194 | static int __s390_process_res_acc(struct subchannel *sch, void *data) |
1da177e4 | 195 | { |
2ec22984 | 196 | spin_lock_irq(sch->lock); |
c820de39 CH |
197 | if (sch->driver && sch->driver->chp_event) |
198 | sch->driver->chp_event(sch, data, CHP_ONLINE); | |
2ec22984 | 199 | spin_unlock_irq(sch->lock); |
e82a1567 | 200 | |
dd9963f9 | 201 | return 0; |
f97a56fb CH |
202 | } |
203 | ||
99611f87 | 204 | static void s390_process_res_acc(struct chp_link *link) |
f97a56fb | 205 | { |
1da177e4 LT |
206 | char dbf_txt[15]; |
207 | ||
99611f87 CH |
208 | sprintf(dbf_txt, "accpr%x.%02x", link->chpid.cssid, |
209 | link->chpid.id); | |
1da177e4 | 210 | CIO_TRACE_EVENT( 2, dbf_txt); |
99611f87 CH |
211 | if (link->fla != 0) { |
212 | sprintf(dbf_txt, "fla%x", link->fla); | |
1da177e4 LT |
213 | CIO_TRACE_EVENT( 2, dbf_txt); |
214 | } | |
22806dc1 CH |
215 | /* Wait until previous actions have settled. */ |
216 | css_wait_for_slow_path(); | |
1da177e4 LT |
217 | /* |
218 | * I/O resources may have become accessible. | |
219 | * Scan through all subchannels that may be concerned and | |
220 | * do a validation on those. | |
221 | * The more information we have (info), the less scanning | |
222 | * will we have to do. | |
223 | */ | |
e82a1567 | 224 | for_each_subchannel_staged(__s390_process_res_acc, |
99611f87 | 225 | s390_process_res_acc_new_sch, link); |
1da177e4 LT |
226 | } |
227 | ||
228 | static int | |
229 | __get_chpid_from_lir(void *data) | |
230 | { | |
231 | struct lir { | |
232 | u8 iq; | |
233 | u8 ic; | |
234 | u16 sci; | |
235 | /* incident-node descriptor */ | |
236 | u32 indesc[28]; | |
237 | /* attached-node descriptor */ | |
238 | u32 andesc[28]; | |
239 | /* incident-specific information */ | |
240 | u32 isinfo[28]; | |
0f008aa3 | 241 | } __attribute__ ((packed)) *lir; |
1da177e4 | 242 | |
12975aef | 243 | lir = data; |
1da177e4 LT |
244 | if (!(lir->iq&0x80)) |
245 | /* NULL link incident record */ | |
246 | return -EINVAL; | |
247 | if (!(lir->indesc[0]&0xc0000000)) | |
248 | /* node descriptor not valid */ | |
249 | return -EINVAL; | |
250 | if (!(lir->indesc[0]&0x10000000)) | |
251 | /* don't handle device-type nodes - FIXME */ | |
252 | return -EINVAL; | |
253 | /* Byte 3 contains the chpid. Could also be CTCA, but we don't care */ | |
254 | ||
255 | return (u16) (lir->indesc[0]&0x000000ff); | |
256 | } | |
257 | ||
184357a5 PO |
258 | struct chsc_sei_area { |
259 | struct chsc_header request; | |
260 | u32 reserved1; | |
261 | u32 reserved2; | |
262 | u32 reserved3; | |
263 | struct chsc_header response; | |
264 | u32 reserved4; | |
265 | u8 flags; | |
266 | u8 vf; /* validity flags */ | |
267 | u8 rs; /* reporting source */ | |
268 | u8 cc; /* content code */ | |
269 | u16 fla; /* full link address */ | |
270 | u16 rsid; /* reporting source id */ | |
271 | u32 reserved5; | |
272 | u32 reserved6; | |
273 | u8 ccdf[4096 - 16 - 24]; /* content-code dependent field */ | |
274 | /* ccdf has to be big enough for a link-incident record */ | |
275 | } __attribute__ ((packed)); | |
276 | ||
83b3370c | 277 | static void chsc_process_sei_link_incident(struct chsc_sei_area *sei_area) |
184357a5 | 278 | { |
f86635fa PO |
279 | struct chp_id chpid; |
280 | int id; | |
184357a5 PO |
281 | |
282 | CIO_CRW_EVENT(4, "chsc: link incident (rs=%02x, rs_id=%04x)\n", | |
283 | sei_area->rs, sei_area->rsid); | |
284 | if (sei_area->rs != 4) | |
83b3370c | 285 | return; |
f86635fa PO |
286 | id = __get_chpid_from_lir(sei_area->ccdf); |
287 | if (id < 0) | |
184357a5 | 288 | CIO_CRW_EVENT(4, "chsc: link incident - invalid LIR\n"); |
f86635fa PO |
289 | else { |
290 | chp_id_init(&chpid); | |
291 | chpid.id = id; | |
e6b6e10a | 292 | chsc_chp_offline(chpid); |
f86635fa | 293 | } |
184357a5 PO |
294 | } |
295 | ||
83b3370c | 296 | static void chsc_process_sei_res_acc(struct chsc_sei_area *sei_area) |
1da177e4 | 297 | { |
99611f87 | 298 | struct chp_link link; |
f86635fa | 299 | struct chp_id chpid; |
184357a5 | 300 | int status; |
184357a5 PO |
301 | |
302 | CIO_CRW_EVENT(4, "chsc: resource accessibility event (rs=%02x, " | |
303 | "rs_id=%04x)\n", sei_area->rs, sei_area->rsid); | |
304 | if (sei_area->rs != 4) | |
83b3370c | 305 | return; |
f86635fa PO |
306 | chp_id_init(&chpid); |
307 | chpid.id = sei_area->rsid; | |
184357a5 | 308 | /* allocate a new channel path structure, if needed */ |
e6b6e10a | 309 | status = chp_get_status(chpid); |
184357a5 | 310 | if (status < 0) |
e6b6e10a | 311 | chp_new(chpid); |
184357a5 | 312 | else if (!status) |
83b3370c | 313 | return; |
99611f87 CH |
314 | memset(&link, 0, sizeof(struct chp_link)); |
315 | link.chpid = chpid; | |
184357a5 | 316 | if ((sei_area->vf & 0xc0) != 0) { |
99611f87 | 317 | link.fla = sei_area->fla; |
184357a5 PO |
318 | if ((sei_area->vf & 0xc0) == 0xc0) |
319 | /* full link address */ | |
99611f87 | 320 | link.fla_mask = 0xffff; |
184357a5 PO |
321 | else |
322 | /* link address */ | |
99611f87 | 323 | link.fla_mask = 0xff00; |
184357a5 | 324 | } |
99611f87 | 325 | s390_process_res_acc(&link); |
184357a5 PO |
326 | } |
327 | ||
fca894ed SO |
328 | static void chsc_process_sei_chp_avail(struct chsc_sei_area *sei_area) |
329 | { | |
330 | struct channel_path *chp; | |
331 | struct chp_id chpid; | |
332 | u8 *data; | |
333 | int num; | |
334 | ||
335 | CIO_CRW_EVENT(4, "chsc: channel path availability information\n"); | |
336 | if (sei_area->rs != 0) | |
337 | return; | |
338 | data = sei_area->ccdf; | |
339 | chp_id_init(&chpid); | |
340 | for (num = 0; num <= __MAX_CHPID; num++) { | |
341 | if (!chp_test_bit(data, num)) | |
342 | continue; | |
343 | chpid.id = num; | |
344 | ||
345 | CIO_CRW_EVENT(4, "Update information for channel path " | |
346 | "%x.%02x\n", chpid.cssid, chpid.id); | |
347 | chp = chpid_to_chp(chpid); | |
348 | if (!chp) { | |
349 | chp_new(chpid); | |
350 | continue; | |
351 | } | |
352 | mutex_lock(&chp->lock); | |
353 | chsc_determine_base_channel_path_desc(chpid, &chp->desc); | |
354 | mutex_unlock(&chp->lock); | |
355 | } | |
356 | } | |
357 | ||
e5854a58 PO |
358 | struct chp_config_data { |
359 | u8 map[32]; | |
360 | u8 op; | |
361 | u8 pc; | |
362 | }; | |
363 | ||
83b3370c | 364 | static void chsc_process_sei_chp_config(struct chsc_sei_area *sei_area) |
e5854a58 PO |
365 | { |
366 | struct chp_config_data *data; | |
367 | struct chp_id chpid; | |
368 | int num; | |
e6d5a428 | 369 | char *events[3] = {"configure", "deconfigure", "cancel deconfigure"}; |
e5854a58 PO |
370 | |
371 | CIO_CRW_EVENT(4, "chsc: channel-path-configuration notification\n"); | |
372 | if (sei_area->rs != 0) | |
83b3370c | 373 | return; |
e5854a58 PO |
374 | data = (struct chp_config_data *) &(sei_area->ccdf); |
375 | chp_id_init(&chpid); | |
376 | for (num = 0; num <= __MAX_CHPID; num++) { | |
377 | if (!chp_test_bit(data->map, num)) | |
378 | continue; | |
379 | chpid.id = num; | |
e6d5a428 ME |
380 | pr_notice("Processing %s for channel path %x.%02x\n", |
381 | events[data->op], chpid.cssid, chpid.id); | |
e5854a58 PO |
382 | switch (data->op) { |
383 | case 0: | |
384 | chp_cfg_schedule(chpid, 1); | |
385 | break; | |
386 | case 1: | |
387 | chp_cfg_schedule(chpid, 0); | |
388 | break; | |
389 | case 2: | |
390 | chp_cfg_cancel_deconfigure(chpid); | |
391 | break; | |
392 | } | |
393 | } | |
e5854a58 PO |
394 | } |
395 | ||
83b3370c | 396 | static void chsc_process_sei(struct chsc_sei_area *sei_area) |
184357a5 | 397 | { |
184357a5 | 398 | /* Check if we might have lost some information. */ |
83b3370c | 399 | if (sei_area->flags & 0x40) { |
184357a5 | 400 | CIO_CRW_EVENT(2, "chsc: event overflow\n"); |
83b3370c PO |
401 | css_schedule_eval_all(); |
402 | } | |
184357a5 | 403 | /* which kind of information was stored? */ |
184357a5 PO |
404 | switch (sei_area->cc) { |
405 | case 1: /* link incident*/ | |
83b3370c | 406 | chsc_process_sei_link_incident(sei_area); |
184357a5 | 407 | break; |
fca894ed | 408 | case 2: /* i/o resource accessibility */ |
83b3370c | 409 | chsc_process_sei_res_acc(sei_area); |
184357a5 | 410 | break; |
fca894ed SO |
411 | case 7: /* channel-path-availability information */ |
412 | chsc_process_sei_chp_avail(sei_area); | |
413 | break; | |
e5854a58 | 414 | case 8: /* channel-path-configuration notification */ |
83b3370c | 415 | chsc_process_sei_chp_config(sei_area); |
e5854a58 | 416 | break; |
184357a5 PO |
417 | default: /* other stuff */ |
418 | CIO_CRW_EVENT(4, "chsc: unhandled sei content code %d\n", | |
419 | sei_area->cc); | |
420 | break; | |
421 | } | |
184357a5 PO |
422 | } |
423 | ||
c1156189 | 424 | static void chsc_process_crw(struct crw *crw0, struct crw *crw1, int overflow) |
184357a5 PO |
425 | { |
426 | struct chsc_sei_area *sei_area; | |
1da177e4 | 427 | |
c1156189 CH |
428 | if (overflow) { |
429 | css_schedule_eval_all(); | |
430 | return; | |
431 | } | |
432 | CIO_CRW_EVENT(2, "CRW reports slct=%d, oflw=%d, " | |
433 | "chn=%d, rsc=%X, anc=%d, erc=%X, rsid=%X\n", | |
434 | crw0->slct, crw0->oflw, crw0->chn, crw0->rsc, crw0->anc, | |
435 | crw0->erc, crw0->rsid); | |
1da177e4 | 436 | if (!sei_page) |
83b3370c | 437 | return; |
184357a5 PO |
438 | /* Access to sei_page is serialized through machine check handler |
439 | * thread, so no need for locking. */ | |
1da177e4 LT |
440 | sei_area = sei_page; |
441 | ||
c1156189 | 442 | CIO_TRACE_EVENT(2, "prcss"); |
1da177e4 | 443 | do { |
1da177e4 | 444 | memset(sei_area, 0, sizeof(*sei_area)); |
495a5b45 CH |
445 | sei_area->request.length = 0x0010; |
446 | sei_area->request.code = 0x000e; | |
184357a5 PO |
447 | if (chsc(sei_area)) |
448 | break; | |
1da177e4 | 449 | |
184357a5 PO |
450 | if (sei_area->response.code == 0x0001) { |
451 | CIO_CRW_EVENT(4, "chsc: sei successful\n"); | |
83b3370c | 452 | chsc_process_sei(sei_area); |
184357a5 PO |
453 | } else { |
454 | CIO_CRW_EVENT(2, "chsc: sei failed (rc=%04x)\n", | |
1da177e4 | 455 | sei_area->response.code); |
1da177e4 LT |
456 | break; |
457 | } | |
458 | } while (sei_area->flags & 0x80); | |
1da177e4 LT |
459 | } |
460 | ||
83b3370c | 461 | void chsc_chp_online(struct chp_id chpid) |
f97a56fb | 462 | { |
1da177e4 | 463 | char dbf_txt[15]; |
99611f87 | 464 | struct chp_link link; |
1da177e4 | 465 | |
f86635fa | 466 | sprintf(dbf_txt, "cadd%x.%02x", chpid.cssid, chpid.id); |
1da177e4 LT |
467 | CIO_TRACE_EVENT(2, dbf_txt); |
468 | ||
22806dc1 | 469 | if (chp_get_status(chpid) != 0) { |
99611f87 CH |
470 | memset(&link, 0, sizeof(struct chp_link)); |
471 | link.chpid = chpid; | |
22806dc1 CH |
472 | /* Wait until previous actions have settled. */ |
473 | css_wait_for_slow_path(); | |
c820de39 | 474 | for_each_subchannel_staged(__s390_process_res_acc, NULL, |
99611f87 | 475 | &link); |
22806dc1 | 476 | } |
1da177e4 LT |
477 | } |
478 | ||
f86635fa PO |
479 | static void __s390_subchannel_vary_chpid(struct subchannel *sch, |
480 | struct chp_id chpid, int on) | |
1da177e4 | 481 | { |
1da177e4 | 482 | unsigned long flags; |
99611f87 | 483 | struct chp_link link; |
1da177e4 | 484 | |
99611f87 CH |
485 | memset(&link, 0, sizeof(struct chp_link)); |
486 | link.chpid = chpid; | |
2ec22984 | 487 | spin_lock_irqsave(sch->lock, flags); |
c820de39 | 488 | if (sch->driver && sch->driver->chp_event) |
99611f87 | 489 | sch->driver->chp_event(sch, &link, |
c820de39 | 490 | on ? CHP_VARY_ON : CHP_VARY_OFF); |
2ec22984 | 491 | spin_unlock_irqrestore(sch->lock, flags); |
1da177e4 LT |
492 | } |
493 | ||
e82a1567 | 494 | static int s390_subchannel_vary_chpid_off(struct subchannel *sch, void *data) |
1da177e4 | 495 | { |
e82a1567 | 496 | struct chp_id *chpid = data; |
1da177e4 LT |
497 | |
498 | __s390_subchannel_vary_chpid(sch, *chpid, 0); | |
499 | return 0; | |
500 | } | |
501 | ||
e82a1567 | 502 | static int s390_subchannel_vary_chpid_on(struct subchannel *sch, void *data) |
1da177e4 | 503 | { |
e82a1567 | 504 | struct chp_id *chpid = data; |
1da177e4 LT |
505 | |
506 | __s390_subchannel_vary_chpid(sch, *chpid, 1); | |
507 | return 0; | |
508 | } | |
509 | ||
f97a56fb CH |
510 | static int |
511 | __s390_vary_chpid_on(struct subchannel_id schid, void *data) | |
512 | { | |
513 | struct schib schib; | |
f97a56fb | 514 | |
fb6958a5 | 515 | if (stsch_err(schid, &schib)) |
f97a56fb CH |
516 | /* We're through */ |
517 | return -ENXIO; | |
518 | /* Put it on the slow path. */ | |
83b3370c | 519 | css_schedule_eval(schid); |
f97a56fb CH |
520 | return 0; |
521 | } | |
522 | ||
e6b6e10a PO |
523 | /** |
524 | * chsc_chp_vary - propagate channel-path vary operation to subchannels | |
525 | * @chpid: channl-path ID | |
526 | * @on: non-zero for vary online, zero for vary offline | |
1da177e4 | 527 | */ |
e6b6e10a | 528 | int chsc_chp_vary(struct chp_id chpid, int on) |
1da177e4 | 529 | { |
c38a90a3 | 530 | struct channel_path *chp = chpid_to_chp(chpid); |
99611f87 | 531 | |
22806dc1 CH |
532 | /* Wait until previous actions have settled. */ |
533 | css_wait_for_slow_path(); | |
1da177e4 LT |
534 | /* |
535 | * Redo PathVerification on the devices the chpid connects to | |
536 | */ | |
c38a90a3 SO |
537 | if (on) { |
538 | /* Try to update the channel path descritor. */ | |
539 | chsc_determine_base_channel_path_desc(chpid, &chp->desc); | |
e82a1567 | 540 | for_each_subchannel_staged(s390_subchannel_vary_chpid_on, |
3b484ec6 | 541 | __s390_vary_chpid_on, &chpid); |
c38a90a3 | 542 | } else |
e82a1567 | 543 | for_each_subchannel_staged(s390_subchannel_vary_chpid_off, |
3b484ec6 | 544 | NULL, &chpid); |
e82a1567 | 545 | |
1da177e4 LT |
546 | return 0; |
547 | } | |
548 | ||
495a5b45 CH |
549 | static void |
550 | chsc_remove_cmg_attr(struct channel_subsystem *css) | |
551 | { | |
552 | int i; | |
553 | ||
554 | for (i = 0; i <= __MAX_CHPID; i++) { | |
555 | if (!css->chps[i]) | |
556 | continue; | |
e6b6e10a | 557 | chp_remove_cmg_attr(css->chps[i]); |
495a5b45 CH |
558 | } |
559 | } | |
560 | ||
561 | static int | |
562 | chsc_add_cmg_attr(struct channel_subsystem *css) | |
563 | { | |
564 | int i, ret; | |
565 | ||
566 | ret = 0; | |
567 | for (i = 0; i <= __MAX_CHPID; i++) { | |
568 | if (!css->chps[i]) | |
569 | continue; | |
e6b6e10a | 570 | ret = chp_add_cmg_attr(css->chps[i]); |
495a5b45 CH |
571 | if (ret) |
572 | goto cleanup; | |
573 | } | |
574 | return ret; | |
575 | cleanup: | |
576 | for (--i; i >= 0; i--) { | |
577 | if (!css->chps[i]) | |
578 | continue; | |
e6b6e10a | 579 | chp_remove_cmg_attr(css->chps[i]); |
495a5b45 CH |
580 | } |
581 | return ret; | |
582 | } | |
583 | ||
34196f82 | 584 | int __chsc_do_secm(struct channel_subsystem *css, int enable) |
495a5b45 CH |
585 | { |
586 | struct { | |
587 | struct chsc_header request; | |
588 | u32 operation_code : 2; | |
589 | u32 : 30; | |
590 | u32 key : 4; | |
591 | u32 : 28; | |
592 | u32 zeroes1; | |
593 | u32 cub_addr1; | |
594 | u32 zeroes2; | |
595 | u32 cub_addr2; | |
596 | u32 reserved[13]; | |
597 | struct chsc_header response; | |
598 | u32 status : 8; | |
599 | u32 : 4; | |
600 | u32 fmt : 4; | |
601 | u32 : 16; | |
0f008aa3 | 602 | } __attribute__ ((packed)) *secm_area; |
495a5b45 CH |
603 | int ret, ccode; |
604 | ||
34196f82 SO |
605 | spin_lock_irq(&chsc_page_lock); |
606 | memset(chsc_page, 0, PAGE_SIZE); | |
607 | secm_area = chsc_page; | |
495a5b45 CH |
608 | secm_area->request.length = 0x0050; |
609 | secm_area->request.code = 0x0016; | |
610 | ||
d1bf8590 | 611 | secm_area->key = PAGE_DEFAULT_KEY >> 4; |
495a5b45 CH |
612 | secm_area->cub_addr1 = (u64)(unsigned long)css->cub_addr1; |
613 | secm_area->cub_addr2 = (u64)(unsigned long)css->cub_addr2; | |
614 | ||
615 | secm_area->operation_code = enable ? 0 : 1; | |
616 | ||
617 | ccode = chsc(secm_area); | |
34196f82 SO |
618 | if (ccode > 0) { |
619 | ret = (ccode == 3) ? -ENODEV : -EBUSY; | |
620 | goto out; | |
621 | } | |
495a5b45 CH |
622 | |
623 | switch (secm_area->response.code) { | |
b9c9a21a CH |
624 | case 0x0102: |
625 | case 0x0103: | |
495a5b45 | 626 | ret = -EINVAL; |
17e7d87d | 627 | break; |
495a5b45 | 628 | default: |
b9c9a21a | 629 | ret = chsc_error_from_response(secm_area->response.code); |
495a5b45 | 630 | } |
b9c9a21a CH |
631 | if (ret != 0) |
632 | CIO_CRW_EVENT(2, "chsc: secm failed (rc=%04x)\n", | |
633 | secm_area->response.code); | |
34196f82 SO |
634 | out: |
635 | spin_unlock_irq(&chsc_page_lock); | |
495a5b45 CH |
636 | return ret; |
637 | } | |
638 | ||
639 | int | |
640 | chsc_secm(struct channel_subsystem *css, int enable) | |
641 | { | |
495a5b45 CH |
642 | int ret; |
643 | ||
495a5b45 CH |
644 | if (enable && !css->cm_enabled) { |
645 | css->cub_addr1 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
646 | css->cub_addr2 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
647 | if (!css->cub_addr1 || !css->cub_addr2) { | |
648 | free_page((unsigned long)css->cub_addr1); | |
649 | free_page((unsigned long)css->cub_addr2); | |
495a5b45 CH |
650 | return -ENOMEM; |
651 | } | |
652 | } | |
34196f82 | 653 | ret = __chsc_do_secm(css, enable); |
495a5b45 CH |
654 | if (!ret) { |
655 | css->cm_enabled = enable; | |
656 | if (css->cm_enabled) { | |
657 | ret = chsc_add_cmg_attr(css); | |
658 | if (ret) { | |
34196f82 | 659 | __chsc_do_secm(css, 0); |
495a5b45 CH |
660 | css->cm_enabled = 0; |
661 | } | |
662 | } else | |
663 | chsc_remove_cmg_attr(css); | |
664 | } | |
8c4941c5 | 665 | if (!css->cm_enabled) { |
495a5b45 CH |
666 | free_page((unsigned long)css->cub_addr1); |
667 | free_page((unsigned long)css->cub_addr2); | |
668 | } | |
495a5b45 CH |
669 | return ret; |
670 | } | |
671 | ||
9d92a7e1 | 672 | int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt, |
906c9768 | 673 | int c, int m, void *page) |
1da177e4 | 674 | { |
906c9768 | 675 | struct chsc_scpd *scpd_area; |
1da177e4 LT |
676 | int ccode, ret; |
677 | ||
9d92a7e1 CH |
678 | if ((rfmt == 1) && !css_general_characteristics.fcs) |
679 | return -EINVAL; | |
680 | if ((rfmt == 2) && !css_general_characteristics.cib) | |
681 | return -EINVAL; | |
1da177e4 | 682 | |
906c9768 SO |
683 | memset(page, 0, PAGE_SIZE); |
684 | scpd_area = page; | |
495a5b45 CH |
685 | scpd_area->request.length = 0x0010; |
686 | scpd_area->request.code = 0x0002; | |
9d92a7e1 | 687 | scpd_area->cssid = chpid.cssid; |
f86635fa PO |
688 | scpd_area->first_chpid = chpid.id; |
689 | scpd_area->last_chpid = chpid.id; | |
9d92a7e1 CH |
690 | scpd_area->m = m; |
691 | scpd_area->c = c; | |
692 | scpd_area->fmt = fmt; | |
693 | scpd_area->rfmt = rfmt; | |
1da177e4 LT |
694 | |
695 | ccode = chsc(scpd_area); | |
906c9768 SO |
696 | if (ccode > 0) |
697 | return (ccode == 3) ? -ENODEV : -EBUSY; | |
1da177e4 | 698 | |
b9c9a21a | 699 | ret = chsc_error_from_response(scpd_area->response.code); |
906c9768 | 700 | if (ret) |
b9c9a21a | 701 | CIO_CRW_EVENT(2, "chsc: scpd failed (rc=%04x)\n", |
1da177e4 | 702 | scpd_area->response.code); |
1da177e4 LT |
703 | return ret; |
704 | } | |
9d92a7e1 CH |
705 | EXPORT_SYMBOL_GPL(chsc_determine_channel_path_desc); |
706 | ||
707 | int chsc_determine_base_channel_path_desc(struct chp_id chpid, | |
708 | struct channel_path_desc *desc) | |
709 | { | |
710 | struct chsc_response_struct *chsc_resp; | |
906c9768 | 711 | struct chsc_scpd *scpd_area; |
62da177a | 712 | unsigned long flags; |
9d92a7e1 CH |
713 | int ret; |
714 | ||
62da177a | 715 | spin_lock_irqsave(&chsc_page_lock, flags); |
906c9768 SO |
716 | scpd_area = chsc_page; |
717 | ret = chsc_determine_channel_path_desc(chpid, 0, 0, 0, 0, scpd_area); | |
9d92a7e1 | 718 | if (ret) |
906c9768 SO |
719 | goto out; |
720 | chsc_resp = (void *)&scpd_area->response; | |
878c4956 | 721 | memcpy(desc, &chsc_resp->data, sizeof(*desc)); |
906c9768 | 722 | out: |
62da177a | 723 | spin_unlock_irqrestore(&chsc_page_lock, flags); |
9d92a7e1 CH |
724 | return ret; |
725 | } | |
1da177e4 | 726 | |
ce322ccd SO |
727 | int chsc_determine_fmt1_channel_path_desc(struct chp_id chpid, |
728 | struct channel_path_desc_fmt1 *desc) | |
729 | { | |
730 | struct chsc_response_struct *chsc_resp; | |
731 | struct chsc_scpd *scpd_area; | |
732 | int ret; | |
733 | ||
734 | spin_lock_irq(&chsc_page_lock); | |
735 | scpd_area = chsc_page; | |
736 | ret = chsc_determine_channel_path_desc(chpid, 0, 0, 1, 0, scpd_area); | |
737 | if (ret) | |
738 | goto out; | |
739 | chsc_resp = (void *)&scpd_area->response; | |
740 | memcpy(desc, &chsc_resp->data, sizeof(*desc)); | |
741 | out: | |
742 | spin_unlock_irq(&chsc_page_lock); | |
743 | return ret; | |
744 | } | |
745 | ||
495a5b45 CH |
746 | static void |
747 | chsc_initialize_cmg_chars(struct channel_path *chp, u8 cmcv, | |
748 | struct cmg_chars *chars) | |
749 | { | |
34196f82 SO |
750 | struct cmg_chars *cmg_chars; |
751 | int i, mask; | |
752 | ||
753 | cmg_chars = chp->cmg_chars; | |
754 | for (i = 0; i < NR_MEASUREMENT_CHARS; i++) { | |
755 | mask = 0x80 >> (i + 3); | |
756 | if (cmcv & mask) | |
757 | cmg_chars->values[i] = chars->values[i]; | |
758 | else | |
759 | cmg_chars->values[i] = 0; | |
495a5b45 CH |
760 | } |
761 | } | |
762 | ||
e6b6e10a | 763 | int chsc_get_channel_measurement_chars(struct channel_path *chp) |
495a5b45 | 764 | { |
34196f82 | 765 | struct cmg_chars *cmg_chars; |
495a5b45 CH |
766 | int ccode, ret; |
767 | ||
768 | struct { | |
769 | struct chsc_header request; | |
770 | u32 : 24; | |
771 | u32 first_chpid : 8; | |
772 | u32 : 24; | |
773 | u32 last_chpid : 8; | |
774 | u32 zeroes1; | |
775 | struct chsc_header response; | |
776 | u32 zeroes2; | |
777 | u32 not_valid : 1; | |
778 | u32 shared : 1; | |
779 | u32 : 22; | |
780 | u32 chpid : 8; | |
781 | u32 cmcv : 5; | |
782 | u32 : 11; | |
783 | u32 cmgq : 8; | |
784 | u32 cmg : 8; | |
785 | u32 zeroes3; | |
786 | u32 data[NR_MEASUREMENT_CHARS]; | |
0f008aa3 | 787 | } __attribute__ ((packed)) *scmc_area; |
495a5b45 | 788 | |
34196f82 SO |
789 | chp->cmg_chars = NULL; |
790 | cmg_chars = kmalloc(sizeof(*cmg_chars), GFP_KERNEL); | |
791 | if (!cmg_chars) | |
495a5b45 CH |
792 | return -ENOMEM; |
793 | ||
34196f82 SO |
794 | spin_lock_irq(&chsc_page_lock); |
795 | memset(chsc_page, 0, PAGE_SIZE); | |
796 | scmc_area = chsc_page; | |
495a5b45 CH |
797 | scmc_area->request.length = 0x0010; |
798 | scmc_area->request.code = 0x0022; | |
f86635fa PO |
799 | scmc_area->first_chpid = chp->chpid.id; |
800 | scmc_area->last_chpid = chp->chpid.id; | |
495a5b45 CH |
801 | |
802 | ccode = chsc(scmc_area); | |
803 | if (ccode > 0) { | |
804 | ret = (ccode == 3) ? -ENODEV : -EBUSY; | |
805 | goto out; | |
806 | } | |
807 | ||
b9c9a21a | 808 | ret = chsc_error_from_response(scmc_area->response.code); |
34196f82 | 809 | if (ret) { |
b9c9a21a | 810 | CIO_CRW_EVENT(2, "chsc: scmc failed (rc=%04x)\n", |
495a5b45 | 811 | scmc_area->response.code); |
34196f82 SO |
812 | goto out; |
813 | } | |
814 | if (scmc_area->not_valid) { | |
815 | chp->cmg = -1; | |
816 | chp->shared = -1; | |
817 | goto out; | |
818 | } | |
819 | chp->cmg = scmc_area->cmg; | |
820 | chp->shared = scmc_area->shared; | |
821 | if (chp->cmg != 2 && chp->cmg != 3) { | |
822 | /* No cmg-dependent data. */ | |
823 | goto out; | |
495a5b45 | 824 | } |
34196f82 SO |
825 | chp->cmg_chars = cmg_chars; |
826 | chsc_initialize_cmg_chars(chp, scmc_area->cmcv, | |
827 | (struct cmg_chars *) &scmc_area->data); | |
495a5b45 | 828 | out: |
34196f82 SO |
829 | spin_unlock_irq(&chsc_page_lock); |
830 | if (!chp->cmg_chars) | |
831 | kfree(cmg_chars); | |
832 | ||
495a5b45 CH |
833 | return ret; |
834 | } | |
835 | ||
34aec07c | 836 | int __init chsc_init(void) |
1da177e4 | 837 | { |
c1156189 CH |
838 | int ret; |
839 | ||
1da177e4 | 840 | sei_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
34196f82 SO |
841 | chsc_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
842 | if (!sei_page || !chsc_page) { | |
843 | ret = -ENOMEM; | |
844 | goto out_err; | |
c1156189 | 845 | } |
f5daba1d | 846 | ret = crw_register_handler(CRW_RSC_CSS, chsc_process_crw); |
c1156189 | 847 | if (ret) |
34196f82 SO |
848 | goto out_err; |
849 | return ret; | |
850 | out_err: | |
851 | free_page((unsigned long)chsc_page); | |
852 | free_page((unsigned long)sei_page); | |
c1156189 | 853 | return ret; |
1da177e4 LT |
854 | } |
855 | ||
34aec07c | 856 | void __init chsc_init_cleanup(void) |
4434a38c | 857 | { |
f5daba1d | 858 | crw_unregister_handler(CRW_RSC_CSS); |
34196f82 | 859 | free_page((unsigned long)chsc_page); |
34aec07c | 860 | free_page((unsigned long)sei_page); |
4434a38c CH |
861 | } |
862 | ||
818c272b | 863 | int chsc_enable_facility(int operation_code) |
fb6958a5 | 864 | { |
34196f82 | 865 | unsigned long flags; |
fb6958a5 | 866 | int ret; |
34196f82 | 867 | struct { |
fb6958a5 CH |
868 | struct chsc_header request; |
869 | u8 reserved1:4; | |
870 | u8 format:4; | |
871 | u8 reserved2; | |
872 | u16 operation_code; | |
873 | u32 reserved3; | |
874 | u32 reserved4; | |
875 | u32 operation_data_area[252]; | |
876 | struct chsc_header response; | |
877 | u32 reserved5:4; | |
878 | u32 format2:4; | |
879 | u32 reserved6:24; | |
34196f82 | 880 | } __attribute__ ((packed)) *sda_area; |
fb6958a5 | 881 | |
34196f82 SO |
882 | spin_lock_irqsave(&chsc_page_lock, flags); |
883 | memset(chsc_page, 0, PAGE_SIZE); | |
884 | sda_area = chsc_page; | |
885 | sda_area->request.length = 0x0400; | |
886 | sda_area->request.code = 0x0031; | |
887 | sda_area->operation_code = operation_code; | |
fb6958a5 | 888 | |
34196f82 | 889 | ret = chsc(sda_area); |
fb6958a5 CH |
890 | if (ret > 0) { |
891 | ret = (ret == 3) ? -ENODEV : -EBUSY; | |
892 | goto out; | |
893 | } | |
b9c9a21a | 894 | |
34196f82 | 895 | switch (sda_area->response.code) { |
b9c9a21a | 896 | case 0x0101: |
fb6958a5 CH |
897 | ret = -EOPNOTSUPP; |
898 | break; | |
b9c9a21a | 899 | default: |
34196f82 | 900 | ret = chsc_error_from_response(sda_area->response.code); |
fb6958a5 | 901 | } |
b9c9a21a CH |
902 | if (ret != 0) |
903 | CIO_CRW_EVENT(2, "chsc: sda (oc=%x) failed (rc=%04x)\n", | |
34196f82 SO |
904 | operation_code, sda_area->response.code); |
905 | out: | |
906 | spin_unlock_irqrestore(&chsc_page_lock, flags); | |
fb6958a5 CH |
907 | return ret; |
908 | } | |
909 | ||
1da177e4 LT |
910 | struct css_general_char css_general_characteristics; |
911 | struct css_chsc_char css_chsc_characteristics; | |
912 | ||
913 | int __init | |
914 | chsc_determine_css_characteristics(void) | |
915 | { | |
916 | int result; | |
917 | struct { | |
918 | struct chsc_header request; | |
919 | u32 reserved1; | |
920 | u32 reserved2; | |
921 | u32 reserved3; | |
922 | struct chsc_header response; | |
923 | u32 reserved4; | |
924 | u32 general_char[510]; | |
34aec07c | 925 | u32 chsc_char[508]; |
0f008aa3 | 926 | } __attribute__ ((packed)) *scsc_area; |
1da177e4 | 927 | |
34196f82 SO |
928 | spin_lock_irq(&chsc_page_lock); |
929 | memset(chsc_page, 0, PAGE_SIZE); | |
930 | scsc_area = chsc_page; | |
495a5b45 CH |
931 | scsc_area->request.length = 0x0010; |
932 | scsc_area->request.code = 0x0010; | |
1da177e4 LT |
933 | |
934 | result = chsc(scsc_area); | |
935 | if (result) { | |
b9c9a21a | 936 | result = (result == 3) ? -ENODEV : -EBUSY; |
1da177e4 LT |
937 | goto exit; |
938 | } | |
939 | ||
b9c9a21a CH |
940 | result = chsc_error_from_response(scsc_area->response.code); |
941 | if (result == 0) { | |
942 | memcpy(&css_general_characteristics, scsc_area->general_char, | |
943 | sizeof(css_general_characteristics)); | |
944 | memcpy(&css_chsc_characteristics, scsc_area->chsc_char, | |
945 | sizeof(css_chsc_characteristics)); | |
946 | } else | |
947 | CIO_CRW_EVENT(2, "chsc: scsc failed (rc=%04x)\n", | |
948 | scsc_area->response.code); | |
1da177e4 | 949 | exit: |
34196f82 | 950 | spin_unlock_irq(&chsc_page_lock); |
1da177e4 LT |
951 | return result; |
952 | } | |
953 | ||
954 | EXPORT_SYMBOL_GPL(css_general_characteristics); | |
955 | EXPORT_SYMBOL_GPL(css_chsc_characteristics); | |
d2fec595 MS |
956 | |
957 | int chsc_sstpc(void *page, unsigned int op, u16 ctrl) | |
958 | { | |
959 | struct { | |
960 | struct chsc_header request; | |
961 | unsigned int rsvd0; | |
962 | unsigned int op : 8; | |
963 | unsigned int rsvd1 : 8; | |
964 | unsigned int ctrl : 16; | |
965 | unsigned int rsvd2[5]; | |
966 | struct chsc_header response; | |
967 | unsigned int rsvd3[7]; | |
968 | } __attribute__ ((packed)) *rr; | |
969 | int rc; | |
970 | ||
971 | memset(page, 0, PAGE_SIZE); | |
972 | rr = page; | |
973 | rr->request.length = 0x0020; | |
974 | rr->request.code = 0x0033; | |
975 | rr->op = op; | |
976 | rr->ctrl = ctrl; | |
977 | rc = chsc(rr); | |
978 | if (rc) | |
979 | return -EIO; | |
980 | rc = (rr->response.code == 0x0001) ? 0 : -EIO; | |
981 | return rc; | |
982 | } | |
983 | ||
984 | int chsc_sstpi(void *page, void *result, size_t size) | |
985 | { | |
986 | struct { | |
987 | struct chsc_header request; | |
988 | unsigned int rsvd0[3]; | |
989 | struct chsc_header response; | |
990 | char data[size]; | |
991 | } __attribute__ ((packed)) *rr; | |
992 | int rc; | |
993 | ||
994 | memset(page, 0, PAGE_SIZE); | |
995 | rr = page; | |
996 | rr->request.length = 0x0010; | |
997 | rr->request.code = 0x0038; | |
998 | rc = chsc(rr); | |
999 | if (rc) | |
1000 | return -EIO; | |
1001 | memcpy(result, &rr->data, size); | |
1002 | return (rr->response.code == 0x0001) ? 0 : -EIO; | |
1003 | } | |
1004 | ||
fd0457a6 ME |
1005 | int chsc_siosl(struct subchannel_id schid) |
1006 | { | |
34196f82 SO |
1007 | struct { |
1008 | struct chsc_header request; | |
1009 | u32 word1; | |
1010 | struct subchannel_id sid; | |
1011 | u32 word3; | |
1012 | struct chsc_header response; | |
1013 | u32 word[11]; | |
1014 | } __attribute__ ((packed)) *siosl_area; | |
fd0457a6 ME |
1015 | unsigned long flags; |
1016 | int ccode; | |
1017 | int rc; | |
1018 | ||
34196f82 SO |
1019 | spin_lock_irqsave(&chsc_page_lock, flags); |
1020 | memset(chsc_page, 0, PAGE_SIZE); | |
1021 | siosl_area = chsc_page; | |
1022 | siosl_area->request.length = 0x0010; | |
1023 | siosl_area->request.code = 0x0046; | |
1024 | siosl_area->word1 = 0x80000000; | |
1025 | siosl_area->sid = schid; | |
fd0457a6 | 1026 | |
34196f82 | 1027 | ccode = chsc(siosl_area); |
fd0457a6 ME |
1028 | if (ccode > 0) { |
1029 | if (ccode == 3) | |
1030 | rc = -ENODEV; | |
1031 | else | |
1032 | rc = -EBUSY; | |
1033 | CIO_MSG_EVENT(2, "chsc: chsc failed for 0.%x.%04x (ccode=%d)\n", | |
1034 | schid.ssid, schid.sch_no, ccode); | |
1035 | goto out; | |
1036 | } | |
34196f82 | 1037 | rc = chsc_error_from_response(siosl_area->response.code); |
fd0457a6 ME |
1038 | if (rc) |
1039 | CIO_MSG_EVENT(2, "chsc: siosl failed for 0.%x.%04x (rc=%04x)\n", | |
1040 | schid.ssid, schid.sch_no, | |
34196f82 | 1041 | siosl_area->response.code); |
fd0457a6 ME |
1042 | else |
1043 | CIO_MSG_EVENT(4, "chsc: siosl succeeded for 0.%x.%04x\n", | |
1044 | schid.ssid, schid.sch_no); | |
1045 | out: | |
34196f82 | 1046 | spin_unlock_irqrestore(&chsc_page_lock, flags); |
fd0457a6 ME |
1047 | return rc; |
1048 | } | |
1049 | EXPORT_SYMBOL_GPL(chsc_siosl); |