Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * drivers/s390/cio/chsc.c | |
3 | * S/390 common I/O routines -- channel subsystem call | |
1da177e4 | 4 | * |
34aec07c | 5 | * Copyright IBM Corp. 1999,2010 |
1da177e4 | 6 | * Author(s): Ingo Adlung (adlung@de.ibm.com) |
4ce3b30c | 7 | * Cornelia Huck (cornelia.huck@de.ibm.com) |
1da177e4 LT |
8 | * Arnd Bergmann (arndb@de.ibm.com) |
9 | */ | |
10 | ||
e6d5a428 ME |
11 | #define KMSG_COMPONENT "cio" |
12 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
13 | ||
1da177e4 | 14 | #include <linux/module.h> |
1da177e4 LT |
15 | #include <linux/slab.h> |
16 | #include <linux/init.h> | |
17 | #include <linux/device.h> | |
18 | ||
19 | #include <asm/cio.h> | |
e5854a58 | 20 | #include <asm/chpid.h> |
9d92a7e1 | 21 | #include <asm/chsc.h> |
f5daba1d | 22 | #include <asm/crw.h> |
1da177e4 LT |
23 | |
24 | #include "css.h" | |
25 | #include "cio.h" | |
26 | #include "cio_debug.h" | |
27 | #include "ioasm.h" | |
e6b6e10a | 28 | #include "chp.h" |
1da177e4 LT |
29 | #include "chsc.h" |
30 | ||
1da177e4 | 31 | static void *sei_page; |
34196f82 SO |
32 | static void *chsc_page; |
33 | static DEFINE_SPINLOCK(chsc_page_lock); | |
1da177e4 | 34 | |
dae39843 CH |
35 | /** |
36 | * chsc_error_from_response() - convert a chsc response to an error | |
37 | * @response: chsc response code | |
38 | * | |
39 | * Returns an appropriate Linux error code for @response. | |
40 | */ | |
41 | int chsc_error_from_response(int response) | |
b9c9a21a CH |
42 | { |
43 | switch (response) { | |
44 | case 0x0001: | |
45 | return 0; | |
46 | case 0x0002: | |
47 | case 0x0003: | |
48 | case 0x0006: | |
49 | case 0x0007: | |
50 | case 0x0008: | |
51 | case 0x000a: | |
fd0457a6 | 52 | case 0x0104: |
b9c9a21a CH |
53 | return -EINVAL; |
54 | case 0x0004: | |
55 | return -EOPNOTSUPP; | |
56 | default: | |
57 | return -EIO; | |
58 | } | |
59 | } | |
dae39843 | 60 | EXPORT_SYMBOL_GPL(chsc_error_from_response); |
b9c9a21a | 61 | |
7ad6a249 PO |
62 | struct chsc_ssd_area { |
63 | struct chsc_header request; | |
64 | u16 :10; | |
65 | u16 ssid:2; | |
66 | u16 :4; | |
67 | u16 f_sch; /* first subchannel */ | |
68 | u16 :16; | |
69 | u16 l_sch; /* last subchannel */ | |
70 | u32 :32; | |
71 | struct chsc_header response; | |
72 | u32 :32; | |
73 | u8 sch_valid : 1; | |
74 | u8 dev_valid : 1; | |
75 | u8 st : 3; /* subchannel type */ | |
76 | u8 zeroes : 3; | |
77 | u8 unit_addr; /* unit address */ | |
78 | u16 devno; /* device number */ | |
79 | u8 path_mask; | |
80 | u8 fla_valid_mask; | |
81 | u16 sch; /* subchannel */ | |
82 | u8 chpid[8]; /* chpids 0-7 */ | |
83 | u16 fla[8]; /* full link addresses 0-7 */ | |
84 | } __attribute__ ((packed)); | |
85 | ||
86 | int chsc_get_ssd_info(struct subchannel_id schid, struct chsc_ssd_info *ssd) | |
1da177e4 | 87 | { |
7ad6a249 PO |
88 | struct chsc_ssd_area *ssd_area; |
89 | int ccode; | |
90 | int ret; | |
91 | int i; | |
92 | int mask; | |
1da177e4 | 93 | |
34196f82 SO |
94 | spin_lock_irq(&chsc_page_lock); |
95 | memset(chsc_page, 0, PAGE_SIZE); | |
96 | ssd_area = chsc_page; | |
495a5b45 CH |
97 | ssd_area->request.length = 0x0010; |
98 | ssd_area->request.code = 0x0004; | |
7ad6a249 PO |
99 | ssd_area->ssid = schid.ssid; |
100 | ssd_area->f_sch = schid.sch_no; | |
101 | ssd_area->l_sch = schid.sch_no; | |
1da177e4 LT |
102 | |
103 | ccode = chsc(ssd_area); | |
7ad6a249 | 104 | /* Check response. */ |
1da177e4 | 105 | if (ccode > 0) { |
7ad6a249 | 106 | ret = (ccode == 3) ? -ENODEV : -EBUSY; |
34196f82 | 107 | goto out; |
1da177e4 | 108 | } |
b9c9a21a CH |
109 | ret = chsc_error_from_response(ssd_area->response.code); |
110 | if (ret != 0) { | |
7ad6a249 PO |
111 | CIO_MSG_EVENT(2, "chsc: ssd failed for 0.%x.%04x (rc=%04x)\n", |
112 | schid.ssid, schid.sch_no, | |
1da177e4 | 113 | ssd_area->response.code); |
34196f82 | 114 | goto out; |
1da177e4 | 115 | } |
7ad6a249 PO |
116 | if (!ssd_area->sch_valid) { |
117 | ret = -ENODEV; | |
34196f82 | 118 | goto out; |
1da177e4 | 119 | } |
7ad6a249 PO |
120 | /* Copy data */ |
121 | ret = 0; | |
122 | memset(ssd, 0, sizeof(struct chsc_ssd_info)); | |
b279a4f5 CH |
123 | if ((ssd_area->st != SUBCHANNEL_TYPE_IO) && |
124 | (ssd_area->st != SUBCHANNEL_TYPE_MSG)) | |
34196f82 | 125 | goto out; |
7ad6a249 PO |
126 | ssd->path_mask = ssd_area->path_mask; |
127 | ssd->fla_valid_mask = ssd_area->fla_valid_mask; | |
128 | for (i = 0; i < 8; i++) { | |
129 | mask = 0x80 >> i; | |
130 | if (ssd_area->path_mask & mask) { | |
131 | chp_id_init(&ssd->chpid[i]); | |
132 | ssd->chpid[i].id = ssd_area->chpid[i]; | |
1da177e4 | 133 | } |
7ad6a249 PO |
134 | if (ssd_area->fla_valid_mask & mask) |
135 | ssd->fla[i] = ssd_area->fla[i]; | |
1da177e4 | 136 | } |
34196f82 SO |
137 | out: |
138 | spin_unlock_irq(&chsc_page_lock); | |
1da177e4 LT |
139 | return ret; |
140 | } | |
141 | ||
e82a1567 | 142 | static int s390_subchannel_remove_chpid(struct subchannel *sch, void *data) |
1da177e4 | 143 | { |
2ec22984 | 144 | spin_lock_irq(sch->lock); |
c820de39 CH |
145 | if (sch->driver && sch->driver->chp_event) |
146 | if (sch->driver->chp_event(sch, data, CHP_OFFLINE) != 0) | |
1da177e4 | 147 | goto out_unreg; |
2ec22984 | 148 | spin_unlock_irq(sch->lock); |
1da177e4 | 149 | return 0; |
387b734f | 150 | |
1da177e4 | 151 | out_unreg: |
1da177e4 | 152 | sch->lpm = 0; |
387b734f | 153 | spin_unlock_irq(sch->lock); |
83b3370c | 154 | css_schedule_eval(sch->schid); |
1da177e4 LT |
155 | return 0; |
156 | } | |
157 | ||
e6b6e10a | 158 | void chsc_chp_offline(struct chp_id chpid) |
1da177e4 LT |
159 | { |
160 | char dbf_txt[15]; | |
99611f87 | 161 | struct chp_link link; |
1da177e4 | 162 | |
f86635fa | 163 | sprintf(dbf_txt, "chpr%x.%02x", chpid.cssid, chpid.id); |
1da177e4 LT |
164 | CIO_TRACE_EVENT(2, dbf_txt); |
165 | ||
e6b6e10a | 166 | if (chp_get_status(chpid) <= 0) |
1da177e4 | 167 | return; |
99611f87 CH |
168 | memset(&link, 0, sizeof(struct chp_link)); |
169 | link.chpid = chpid; | |
22806dc1 CH |
170 | /* Wait until previous actions have settled. */ |
171 | css_wait_for_slow_path(); | |
99611f87 | 172 | for_each_subchannel_staged(s390_subchannel_remove_chpid, NULL, &link); |
1da177e4 LT |
173 | } |
174 | ||
e82a1567 | 175 | static int s390_process_res_acc_new_sch(struct subchannel_id schid, void *data) |
f97a56fb CH |
176 | { |
177 | struct schib schib; | |
f97a56fb CH |
178 | /* |
179 | * We don't know the device yet, but since a path | |
180 | * may be available now to the device we'll have | |
181 | * to do recognition again. | |
182 | * Since we don't have any idea about which chpid | |
183 | * that beast may be on we'll have to do a stsch | |
184 | * on all devices, grr... | |
185 | */ | |
fb6958a5 | 186 | if (stsch_err(schid, &schib)) |
f97a56fb | 187 | /* We're through */ |
83b3370c | 188 | return -ENXIO; |
f97a56fb CH |
189 | |
190 | /* Put it on the slow path. */ | |
83b3370c | 191 | css_schedule_eval(schid); |
f97a56fb CH |
192 | return 0; |
193 | } | |
194 | ||
e82a1567 | 195 | static int __s390_process_res_acc(struct subchannel *sch, void *data) |
1da177e4 | 196 | { |
2ec22984 | 197 | spin_lock_irq(sch->lock); |
c820de39 CH |
198 | if (sch->driver && sch->driver->chp_event) |
199 | sch->driver->chp_event(sch, data, CHP_ONLINE); | |
2ec22984 | 200 | spin_unlock_irq(sch->lock); |
e82a1567 | 201 | |
dd9963f9 | 202 | return 0; |
f97a56fb CH |
203 | } |
204 | ||
99611f87 | 205 | static void s390_process_res_acc(struct chp_link *link) |
f97a56fb | 206 | { |
1da177e4 LT |
207 | char dbf_txt[15]; |
208 | ||
99611f87 CH |
209 | sprintf(dbf_txt, "accpr%x.%02x", link->chpid.cssid, |
210 | link->chpid.id); | |
1da177e4 | 211 | CIO_TRACE_EVENT( 2, dbf_txt); |
99611f87 CH |
212 | if (link->fla != 0) { |
213 | sprintf(dbf_txt, "fla%x", link->fla); | |
1da177e4 LT |
214 | CIO_TRACE_EVENT( 2, dbf_txt); |
215 | } | |
22806dc1 CH |
216 | /* Wait until previous actions have settled. */ |
217 | css_wait_for_slow_path(); | |
1da177e4 LT |
218 | /* |
219 | * I/O resources may have become accessible. | |
220 | * Scan through all subchannels that may be concerned and | |
221 | * do a validation on those. | |
222 | * The more information we have (info), the less scanning | |
223 | * will we have to do. | |
224 | */ | |
e82a1567 | 225 | for_each_subchannel_staged(__s390_process_res_acc, |
99611f87 | 226 | s390_process_res_acc_new_sch, link); |
1da177e4 LT |
227 | } |
228 | ||
229 | static int | |
230 | __get_chpid_from_lir(void *data) | |
231 | { | |
232 | struct lir { | |
233 | u8 iq; | |
234 | u8 ic; | |
235 | u16 sci; | |
236 | /* incident-node descriptor */ | |
237 | u32 indesc[28]; | |
238 | /* attached-node descriptor */ | |
239 | u32 andesc[28]; | |
240 | /* incident-specific information */ | |
241 | u32 isinfo[28]; | |
0f008aa3 | 242 | } __attribute__ ((packed)) *lir; |
1da177e4 | 243 | |
12975aef | 244 | lir = data; |
1da177e4 LT |
245 | if (!(lir->iq&0x80)) |
246 | /* NULL link incident record */ | |
247 | return -EINVAL; | |
248 | if (!(lir->indesc[0]&0xc0000000)) | |
249 | /* node descriptor not valid */ | |
250 | return -EINVAL; | |
251 | if (!(lir->indesc[0]&0x10000000)) | |
252 | /* don't handle device-type nodes - FIXME */ | |
253 | return -EINVAL; | |
254 | /* Byte 3 contains the chpid. Could also be CTCA, but we don't care */ | |
255 | ||
256 | return (u16) (lir->indesc[0]&0x000000ff); | |
257 | } | |
258 | ||
184357a5 PO |
259 | struct chsc_sei_area { |
260 | struct chsc_header request; | |
261 | u32 reserved1; | |
262 | u32 reserved2; | |
263 | u32 reserved3; | |
264 | struct chsc_header response; | |
265 | u32 reserved4; | |
266 | u8 flags; | |
267 | u8 vf; /* validity flags */ | |
268 | u8 rs; /* reporting source */ | |
269 | u8 cc; /* content code */ | |
270 | u16 fla; /* full link address */ | |
271 | u16 rsid; /* reporting source id */ | |
272 | u32 reserved5; | |
273 | u32 reserved6; | |
274 | u8 ccdf[4096 - 16 - 24]; /* content-code dependent field */ | |
275 | /* ccdf has to be big enough for a link-incident record */ | |
276 | } __attribute__ ((packed)); | |
277 | ||
83b3370c | 278 | static void chsc_process_sei_link_incident(struct chsc_sei_area *sei_area) |
184357a5 | 279 | { |
f86635fa PO |
280 | struct chp_id chpid; |
281 | int id; | |
184357a5 PO |
282 | |
283 | CIO_CRW_EVENT(4, "chsc: link incident (rs=%02x, rs_id=%04x)\n", | |
284 | sei_area->rs, sei_area->rsid); | |
285 | if (sei_area->rs != 4) | |
83b3370c | 286 | return; |
f86635fa PO |
287 | id = __get_chpid_from_lir(sei_area->ccdf); |
288 | if (id < 0) | |
184357a5 | 289 | CIO_CRW_EVENT(4, "chsc: link incident - invalid LIR\n"); |
f86635fa PO |
290 | else { |
291 | chp_id_init(&chpid); | |
292 | chpid.id = id; | |
e6b6e10a | 293 | chsc_chp_offline(chpid); |
f86635fa | 294 | } |
184357a5 PO |
295 | } |
296 | ||
83b3370c | 297 | static void chsc_process_sei_res_acc(struct chsc_sei_area *sei_area) |
1da177e4 | 298 | { |
99611f87 | 299 | struct chp_link link; |
f86635fa | 300 | struct chp_id chpid; |
184357a5 | 301 | int status; |
184357a5 PO |
302 | |
303 | CIO_CRW_EVENT(4, "chsc: resource accessibility event (rs=%02x, " | |
304 | "rs_id=%04x)\n", sei_area->rs, sei_area->rsid); | |
305 | if (sei_area->rs != 4) | |
83b3370c | 306 | return; |
f86635fa PO |
307 | chp_id_init(&chpid); |
308 | chpid.id = sei_area->rsid; | |
184357a5 | 309 | /* allocate a new channel path structure, if needed */ |
e6b6e10a | 310 | status = chp_get_status(chpid); |
184357a5 | 311 | if (status < 0) |
e6b6e10a | 312 | chp_new(chpid); |
184357a5 | 313 | else if (!status) |
83b3370c | 314 | return; |
99611f87 CH |
315 | memset(&link, 0, sizeof(struct chp_link)); |
316 | link.chpid = chpid; | |
184357a5 | 317 | if ((sei_area->vf & 0xc0) != 0) { |
99611f87 | 318 | link.fla = sei_area->fla; |
184357a5 PO |
319 | if ((sei_area->vf & 0xc0) == 0xc0) |
320 | /* full link address */ | |
99611f87 | 321 | link.fla_mask = 0xffff; |
184357a5 PO |
322 | else |
323 | /* link address */ | |
99611f87 | 324 | link.fla_mask = 0xff00; |
184357a5 | 325 | } |
99611f87 | 326 | s390_process_res_acc(&link); |
184357a5 PO |
327 | } |
328 | ||
fca894ed SO |
329 | static void chsc_process_sei_chp_avail(struct chsc_sei_area *sei_area) |
330 | { | |
331 | struct channel_path *chp; | |
332 | struct chp_id chpid; | |
333 | u8 *data; | |
334 | int num; | |
335 | ||
336 | CIO_CRW_EVENT(4, "chsc: channel path availability information\n"); | |
337 | if (sei_area->rs != 0) | |
338 | return; | |
339 | data = sei_area->ccdf; | |
340 | chp_id_init(&chpid); | |
341 | for (num = 0; num <= __MAX_CHPID; num++) { | |
342 | if (!chp_test_bit(data, num)) | |
343 | continue; | |
344 | chpid.id = num; | |
345 | ||
346 | CIO_CRW_EVENT(4, "Update information for channel path " | |
347 | "%x.%02x\n", chpid.cssid, chpid.id); | |
348 | chp = chpid_to_chp(chpid); | |
349 | if (!chp) { | |
350 | chp_new(chpid); | |
351 | continue; | |
352 | } | |
353 | mutex_lock(&chp->lock); | |
354 | chsc_determine_base_channel_path_desc(chpid, &chp->desc); | |
355 | mutex_unlock(&chp->lock); | |
356 | } | |
357 | } | |
358 | ||
e5854a58 PO |
359 | struct chp_config_data { |
360 | u8 map[32]; | |
361 | u8 op; | |
362 | u8 pc; | |
363 | }; | |
364 | ||
83b3370c | 365 | static void chsc_process_sei_chp_config(struct chsc_sei_area *sei_area) |
e5854a58 PO |
366 | { |
367 | struct chp_config_data *data; | |
368 | struct chp_id chpid; | |
369 | int num; | |
e6d5a428 | 370 | char *events[3] = {"configure", "deconfigure", "cancel deconfigure"}; |
e5854a58 PO |
371 | |
372 | CIO_CRW_EVENT(4, "chsc: channel-path-configuration notification\n"); | |
373 | if (sei_area->rs != 0) | |
83b3370c | 374 | return; |
e5854a58 PO |
375 | data = (struct chp_config_data *) &(sei_area->ccdf); |
376 | chp_id_init(&chpid); | |
377 | for (num = 0; num <= __MAX_CHPID; num++) { | |
378 | if (!chp_test_bit(data->map, num)) | |
379 | continue; | |
380 | chpid.id = num; | |
e6d5a428 ME |
381 | pr_notice("Processing %s for channel path %x.%02x\n", |
382 | events[data->op], chpid.cssid, chpid.id); | |
e5854a58 PO |
383 | switch (data->op) { |
384 | case 0: | |
385 | chp_cfg_schedule(chpid, 1); | |
386 | break; | |
387 | case 1: | |
388 | chp_cfg_schedule(chpid, 0); | |
389 | break; | |
390 | case 2: | |
391 | chp_cfg_cancel_deconfigure(chpid); | |
392 | break; | |
393 | } | |
394 | } | |
e5854a58 PO |
395 | } |
396 | ||
83b3370c | 397 | static void chsc_process_sei(struct chsc_sei_area *sei_area) |
184357a5 | 398 | { |
184357a5 | 399 | /* Check if we might have lost some information. */ |
83b3370c | 400 | if (sei_area->flags & 0x40) { |
184357a5 | 401 | CIO_CRW_EVENT(2, "chsc: event overflow\n"); |
83b3370c PO |
402 | css_schedule_eval_all(); |
403 | } | |
184357a5 | 404 | /* which kind of information was stored? */ |
184357a5 PO |
405 | switch (sei_area->cc) { |
406 | case 1: /* link incident*/ | |
83b3370c | 407 | chsc_process_sei_link_incident(sei_area); |
184357a5 | 408 | break; |
fca894ed | 409 | case 2: /* i/o resource accessibility */ |
83b3370c | 410 | chsc_process_sei_res_acc(sei_area); |
184357a5 | 411 | break; |
fca894ed SO |
412 | case 7: /* channel-path-availability information */ |
413 | chsc_process_sei_chp_avail(sei_area); | |
414 | break; | |
e5854a58 | 415 | case 8: /* channel-path-configuration notification */ |
83b3370c | 416 | chsc_process_sei_chp_config(sei_area); |
e5854a58 | 417 | break; |
184357a5 PO |
418 | default: /* other stuff */ |
419 | CIO_CRW_EVENT(4, "chsc: unhandled sei content code %d\n", | |
420 | sei_area->cc); | |
421 | break; | |
422 | } | |
184357a5 PO |
423 | } |
424 | ||
c1156189 | 425 | static void chsc_process_crw(struct crw *crw0, struct crw *crw1, int overflow) |
184357a5 PO |
426 | { |
427 | struct chsc_sei_area *sei_area; | |
1da177e4 | 428 | |
c1156189 CH |
429 | if (overflow) { |
430 | css_schedule_eval_all(); | |
431 | return; | |
432 | } | |
433 | CIO_CRW_EVENT(2, "CRW reports slct=%d, oflw=%d, " | |
434 | "chn=%d, rsc=%X, anc=%d, erc=%X, rsid=%X\n", | |
435 | crw0->slct, crw0->oflw, crw0->chn, crw0->rsc, crw0->anc, | |
436 | crw0->erc, crw0->rsid); | |
1da177e4 | 437 | if (!sei_page) |
83b3370c | 438 | return; |
184357a5 PO |
439 | /* Access to sei_page is serialized through machine check handler |
440 | * thread, so no need for locking. */ | |
1da177e4 LT |
441 | sei_area = sei_page; |
442 | ||
c1156189 | 443 | CIO_TRACE_EVENT(2, "prcss"); |
1da177e4 | 444 | do { |
1da177e4 | 445 | memset(sei_area, 0, sizeof(*sei_area)); |
495a5b45 CH |
446 | sei_area->request.length = 0x0010; |
447 | sei_area->request.code = 0x000e; | |
184357a5 PO |
448 | if (chsc(sei_area)) |
449 | break; | |
1da177e4 | 450 | |
184357a5 PO |
451 | if (sei_area->response.code == 0x0001) { |
452 | CIO_CRW_EVENT(4, "chsc: sei successful\n"); | |
83b3370c | 453 | chsc_process_sei(sei_area); |
184357a5 PO |
454 | } else { |
455 | CIO_CRW_EVENT(2, "chsc: sei failed (rc=%04x)\n", | |
1da177e4 | 456 | sei_area->response.code); |
1da177e4 LT |
457 | break; |
458 | } | |
459 | } while (sei_area->flags & 0x80); | |
1da177e4 LT |
460 | } |
461 | ||
83b3370c | 462 | void chsc_chp_online(struct chp_id chpid) |
f97a56fb | 463 | { |
1da177e4 | 464 | char dbf_txt[15]; |
99611f87 | 465 | struct chp_link link; |
1da177e4 | 466 | |
f86635fa | 467 | sprintf(dbf_txt, "cadd%x.%02x", chpid.cssid, chpid.id); |
1da177e4 LT |
468 | CIO_TRACE_EVENT(2, dbf_txt); |
469 | ||
22806dc1 | 470 | if (chp_get_status(chpid) != 0) { |
99611f87 CH |
471 | memset(&link, 0, sizeof(struct chp_link)); |
472 | link.chpid = chpid; | |
22806dc1 CH |
473 | /* Wait until previous actions have settled. */ |
474 | css_wait_for_slow_path(); | |
c820de39 | 475 | for_each_subchannel_staged(__s390_process_res_acc, NULL, |
99611f87 | 476 | &link); |
22806dc1 | 477 | } |
1da177e4 LT |
478 | } |
479 | ||
f86635fa PO |
480 | static void __s390_subchannel_vary_chpid(struct subchannel *sch, |
481 | struct chp_id chpid, int on) | |
1da177e4 | 482 | { |
1da177e4 | 483 | unsigned long flags; |
99611f87 | 484 | struct chp_link link; |
1da177e4 | 485 | |
99611f87 CH |
486 | memset(&link, 0, sizeof(struct chp_link)); |
487 | link.chpid = chpid; | |
2ec22984 | 488 | spin_lock_irqsave(sch->lock, flags); |
c820de39 | 489 | if (sch->driver && sch->driver->chp_event) |
99611f87 | 490 | sch->driver->chp_event(sch, &link, |
c820de39 | 491 | on ? CHP_VARY_ON : CHP_VARY_OFF); |
2ec22984 | 492 | spin_unlock_irqrestore(sch->lock, flags); |
1da177e4 LT |
493 | } |
494 | ||
e82a1567 | 495 | static int s390_subchannel_vary_chpid_off(struct subchannel *sch, void *data) |
1da177e4 | 496 | { |
e82a1567 | 497 | struct chp_id *chpid = data; |
1da177e4 LT |
498 | |
499 | __s390_subchannel_vary_chpid(sch, *chpid, 0); | |
500 | return 0; | |
501 | } | |
502 | ||
e82a1567 | 503 | static int s390_subchannel_vary_chpid_on(struct subchannel *sch, void *data) |
1da177e4 | 504 | { |
e82a1567 | 505 | struct chp_id *chpid = data; |
1da177e4 LT |
506 | |
507 | __s390_subchannel_vary_chpid(sch, *chpid, 1); | |
508 | return 0; | |
509 | } | |
510 | ||
f97a56fb CH |
511 | static int |
512 | __s390_vary_chpid_on(struct subchannel_id schid, void *data) | |
513 | { | |
514 | struct schib schib; | |
f97a56fb | 515 | |
fb6958a5 | 516 | if (stsch_err(schid, &schib)) |
f97a56fb CH |
517 | /* We're through */ |
518 | return -ENXIO; | |
519 | /* Put it on the slow path. */ | |
83b3370c | 520 | css_schedule_eval(schid); |
f97a56fb CH |
521 | return 0; |
522 | } | |
523 | ||
e6b6e10a PO |
524 | /** |
525 | * chsc_chp_vary - propagate channel-path vary operation to subchannels | |
526 | * @chpid: channl-path ID | |
527 | * @on: non-zero for vary online, zero for vary offline | |
1da177e4 | 528 | */ |
e6b6e10a | 529 | int chsc_chp_vary(struct chp_id chpid, int on) |
1da177e4 | 530 | { |
c38a90a3 | 531 | struct channel_path *chp = chpid_to_chp(chpid); |
99611f87 | 532 | |
22806dc1 CH |
533 | /* Wait until previous actions have settled. */ |
534 | css_wait_for_slow_path(); | |
1da177e4 LT |
535 | /* |
536 | * Redo PathVerification on the devices the chpid connects to | |
537 | */ | |
c38a90a3 SO |
538 | if (on) { |
539 | /* Try to update the channel path descritor. */ | |
540 | chsc_determine_base_channel_path_desc(chpid, &chp->desc); | |
e82a1567 | 541 | for_each_subchannel_staged(s390_subchannel_vary_chpid_on, |
3b484ec6 | 542 | __s390_vary_chpid_on, &chpid); |
c38a90a3 | 543 | } else |
e82a1567 | 544 | for_each_subchannel_staged(s390_subchannel_vary_chpid_off, |
3b484ec6 | 545 | NULL, &chpid); |
e82a1567 | 546 | |
1da177e4 LT |
547 | return 0; |
548 | } | |
549 | ||
495a5b45 CH |
550 | static void |
551 | chsc_remove_cmg_attr(struct channel_subsystem *css) | |
552 | { | |
553 | int i; | |
554 | ||
555 | for (i = 0; i <= __MAX_CHPID; i++) { | |
556 | if (!css->chps[i]) | |
557 | continue; | |
e6b6e10a | 558 | chp_remove_cmg_attr(css->chps[i]); |
495a5b45 CH |
559 | } |
560 | } | |
561 | ||
562 | static int | |
563 | chsc_add_cmg_attr(struct channel_subsystem *css) | |
564 | { | |
565 | int i, ret; | |
566 | ||
567 | ret = 0; | |
568 | for (i = 0; i <= __MAX_CHPID; i++) { | |
569 | if (!css->chps[i]) | |
570 | continue; | |
e6b6e10a | 571 | ret = chp_add_cmg_attr(css->chps[i]); |
495a5b45 CH |
572 | if (ret) |
573 | goto cleanup; | |
574 | } | |
575 | return ret; | |
576 | cleanup: | |
577 | for (--i; i >= 0; i--) { | |
578 | if (!css->chps[i]) | |
579 | continue; | |
e6b6e10a | 580 | chp_remove_cmg_attr(css->chps[i]); |
495a5b45 CH |
581 | } |
582 | return ret; | |
583 | } | |
584 | ||
34196f82 | 585 | int __chsc_do_secm(struct channel_subsystem *css, int enable) |
495a5b45 CH |
586 | { |
587 | struct { | |
588 | struct chsc_header request; | |
589 | u32 operation_code : 2; | |
590 | u32 : 30; | |
591 | u32 key : 4; | |
592 | u32 : 28; | |
593 | u32 zeroes1; | |
594 | u32 cub_addr1; | |
595 | u32 zeroes2; | |
596 | u32 cub_addr2; | |
597 | u32 reserved[13]; | |
598 | struct chsc_header response; | |
599 | u32 status : 8; | |
600 | u32 : 4; | |
601 | u32 fmt : 4; | |
602 | u32 : 16; | |
0f008aa3 | 603 | } __attribute__ ((packed)) *secm_area; |
495a5b45 CH |
604 | int ret, ccode; |
605 | ||
34196f82 SO |
606 | spin_lock_irq(&chsc_page_lock); |
607 | memset(chsc_page, 0, PAGE_SIZE); | |
608 | secm_area = chsc_page; | |
495a5b45 CH |
609 | secm_area->request.length = 0x0050; |
610 | secm_area->request.code = 0x0016; | |
611 | ||
d1bf8590 | 612 | secm_area->key = PAGE_DEFAULT_KEY >> 4; |
495a5b45 CH |
613 | secm_area->cub_addr1 = (u64)(unsigned long)css->cub_addr1; |
614 | secm_area->cub_addr2 = (u64)(unsigned long)css->cub_addr2; | |
615 | ||
616 | secm_area->operation_code = enable ? 0 : 1; | |
617 | ||
618 | ccode = chsc(secm_area); | |
34196f82 SO |
619 | if (ccode > 0) { |
620 | ret = (ccode == 3) ? -ENODEV : -EBUSY; | |
621 | goto out; | |
622 | } | |
495a5b45 CH |
623 | |
624 | switch (secm_area->response.code) { | |
b9c9a21a CH |
625 | case 0x0102: |
626 | case 0x0103: | |
495a5b45 | 627 | ret = -EINVAL; |
17e7d87d | 628 | break; |
495a5b45 | 629 | default: |
b9c9a21a | 630 | ret = chsc_error_from_response(secm_area->response.code); |
495a5b45 | 631 | } |
b9c9a21a CH |
632 | if (ret != 0) |
633 | CIO_CRW_EVENT(2, "chsc: secm failed (rc=%04x)\n", | |
634 | secm_area->response.code); | |
34196f82 SO |
635 | out: |
636 | spin_unlock_irq(&chsc_page_lock); | |
495a5b45 CH |
637 | return ret; |
638 | } | |
639 | ||
640 | int | |
641 | chsc_secm(struct channel_subsystem *css, int enable) | |
642 | { | |
495a5b45 CH |
643 | int ret; |
644 | ||
495a5b45 CH |
645 | if (enable && !css->cm_enabled) { |
646 | css->cub_addr1 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
647 | css->cub_addr2 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
648 | if (!css->cub_addr1 || !css->cub_addr2) { | |
649 | free_page((unsigned long)css->cub_addr1); | |
650 | free_page((unsigned long)css->cub_addr2); | |
495a5b45 CH |
651 | return -ENOMEM; |
652 | } | |
653 | } | |
34196f82 | 654 | ret = __chsc_do_secm(css, enable); |
495a5b45 CH |
655 | if (!ret) { |
656 | css->cm_enabled = enable; | |
657 | if (css->cm_enabled) { | |
658 | ret = chsc_add_cmg_attr(css); | |
659 | if (ret) { | |
34196f82 | 660 | __chsc_do_secm(css, 0); |
495a5b45 CH |
661 | css->cm_enabled = 0; |
662 | } | |
663 | } else | |
664 | chsc_remove_cmg_attr(css); | |
665 | } | |
8c4941c5 | 666 | if (!css->cm_enabled) { |
495a5b45 CH |
667 | free_page((unsigned long)css->cub_addr1); |
668 | free_page((unsigned long)css->cub_addr2); | |
669 | } | |
495a5b45 CH |
670 | return ret; |
671 | } | |
672 | ||
9d92a7e1 | 673 | int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt, |
906c9768 | 674 | int c, int m, void *page) |
1da177e4 | 675 | { |
906c9768 | 676 | struct chsc_scpd *scpd_area; |
1da177e4 LT |
677 | int ccode, ret; |
678 | ||
9d92a7e1 CH |
679 | if ((rfmt == 1) && !css_general_characteristics.fcs) |
680 | return -EINVAL; | |
681 | if ((rfmt == 2) && !css_general_characteristics.cib) | |
682 | return -EINVAL; | |
1da177e4 | 683 | |
906c9768 SO |
684 | memset(page, 0, PAGE_SIZE); |
685 | scpd_area = page; | |
495a5b45 CH |
686 | scpd_area->request.length = 0x0010; |
687 | scpd_area->request.code = 0x0002; | |
9d92a7e1 | 688 | scpd_area->cssid = chpid.cssid; |
f86635fa PO |
689 | scpd_area->first_chpid = chpid.id; |
690 | scpd_area->last_chpid = chpid.id; | |
9d92a7e1 CH |
691 | scpd_area->m = m; |
692 | scpd_area->c = c; | |
693 | scpd_area->fmt = fmt; | |
694 | scpd_area->rfmt = rfmt; | |
1da177e4 LT |
695 | |
696 | ccode = chsc(scpd_area); | |
906c9768 SO |
697 | if (ccode > 0) |
698 | return (ccode == 3) ? -ENODEV : -EBUSY; | |
1da177e4 | 699 | |
b9c9a21a | 700 | ret = chsc_error_from_response(scpd_area->response.code); |
906c9768 | 701 | if (ret) |
b9c9a21a | 702 | CIO_CRW_EVENT(2, "chsc: scpd failed (rc=%04x)\n", |
1da177e4 | 703 | scpd_area->response.code); |
1da177e4 LT |
704 | return ret; |
705 | } | |
9d92a7e1 CH |
706 | EXPORT_SYMBOL_GPL(chsc_determine_channel_path_desc); |
707 | ||
708 | int chsc_determine_base_channel_path_desc(struct chp_id chpid, | |
709 | struct channel_path_desc *desc) | |
710 | { | |
711 | struct chsc_response_struct *chsc_resp; | |
906c9768 | 712 | struct chsc_scpd *scpd_area; |
62da177a | 713 | unsigned long flags; |
9d92a7e1 CH |
714 | int ret; |
715 | ||
62da177a | 716 | spin_lock_irqsave(&chsc_page_lock, flags); |
906c9768 SO |
717 | scpd_area = chsc_page; |
718 | ret = chsc_determine_channel_path_desc(chpid, 0, 0, 0, 0, scpd_area); | |
9d92a7e1 | 719 | if (ret) |
906c9768 SO |
720 | goto out; |
721 | chsc_resp = (void *)&scpd_area->response; | |
878c4956 | 722 | memcpy(desc, &chsc_resp->data, sizeof(*desc)); |
906c9768 | 723 | out: |
62da177a | 724 | spin_unlock_irqrestore(&chsc_page_lock, flags); |
9d92a7e1 CH |
725 | return ret; |
726 | } | |
1da177e4 | 727 | |
ce322ccd SO |
728 | int chsc_determine_fmt1_channel_path_desc(struct chp_id chpid, |
729 | struct channel_path_desc_fmt1 *desc) | |
730 | { | |
731 | struct chsc_response_struct *chsc_resp; | |
732 | struct chsc_scpd *scpd_area; | |
733 | int ret; | |
734 | ||
735 | spin_lock_irq(&chsc_page_lock); | |
736 | scpd_area = chsc_page; | |
737 | ret = chsc_determine_channel_path_desc(chpid, 0, 0, 1, 0, scpd_area); | |
738 | if (ret) | |
739 | goto out; | |
740 | chsc_resp = (void *)&scpd_area->response; | |
741 | memcpy(desc, &chsc_resp->data, sizeof(*desc)); | |
742 | out: | |
743 | spin_unlock_irq(&chsc_page_lock); | |
744 | return ret; | |
745 | } | |
746 | ||
495a5b45 CH |
747 | static void |
748 | chsc_initialize_cmg_chars(struct channel_path *chp, u8 cmcv, | |
749 | struct cmg_chars *chars) | |
750 | { | |
34196f82 SO |
751 | struct cmg_chars *cmg_chars; |
752 | int i, mask; | |
753 | ||
754 | cmg_chars = chp->cmg_chars; | |
755 | for (i = 0; i < NR_MEASUREMENT_CHARS; i++) { | |
756 | mask = 0x80 >> (i + 3); | |
757 | if (cmcv & mask) | |
758 | cmg_chars->values[i] = chars->values[i]; | |
759 | else | |
760 | cmg_chars->values[i] = 0; | |
495a5b45 CH |
761 | } |
762 | } | |
763 | ||
e6b6e10a | 764 | int chsc_get_channel_measurement_chars(struct channel_path *chp) |
495a5b45 | 765 | { |
34196f82 | 766 | struct cmg_chars *cmg_chars; |
495a5b45 CH |
767 | int ccode, ret; |
768 | ||
769 | struct { | |
770 | struct chsc_header request; | |
771 | u32 : 24; | |
772 | u32 first_chpid : 8; | |
773 | u32 : 24; | |
774 | u32 last_chpid : 8; | |
775 | u32 zeroes1; | |
776 | struct chsc_header response; | |
777 | u32 zeroes2; | |
778 | u32 not_valid : 1; | |
779 | u32 shared : 1; | |
780 | u32 : 22; | |
781 | u32 chpid : 8; | |
782 | u32 cmcv : 5; | |
783 | u32 : 11; | |
784 | u32 cmgq : 8; | |
785 | u32 cmg : 8; | |
786 | u32 zeroes3; | |
787 | u32 data[NR_MEASUREMENT_CHARS]; | |
0f008aa3 | 788 | } __attribute__ ((packed)) *scmc_area; |
495a5b45 | 789 | |
34196f82 SO |
790 | chp->cmg_chars = NULL; |
791 | cmg_chars = kmalloc(sizeof(*cmg_chars), GFP_KERNEL); | |
792 | if (!cmg_chars) | |
495a5b45 CH |
793 | return -ENOMEM; |
794 | ||
34196f82 SO |
795 | spin_lock_irq(&chsc_page_lock); |
796 | memset(chsc_page, 0, PAGE_SIZE); | |
797 | scmc_area = chsc_page; | |
495a5b45 CH |
798 | scmc_area->request.length = 0x0010; |
799 | scmc_area->request.code = 0x0022; | |
f86635fa PO |
800 | scmc_area->first_chpid = chp->chpid.id; |
801 | scmc_area->last_chpid = chp->chpid.id; | |
495a5b45 CH |
802 | |
803 | ccode = chsc(scmc_area); | |
804 | if (ccode > 0) { | |
805 | ret = (ccode == 3) ? -ENODEV : -EBUSY; | |
806 | goto out; | |
807 | } | |
808 | ||
b9c9a21a | 809 | ret = chsc_error_from_response(scmc_area->response.code); |
34196f82 | 810 | if (ret) { |
b9c9a21a | 811 | CIO_CRW_EVENT(2, "chsc: scmc failed (rc=%04x)\n", |
495a5b45 | 812 | scmc_area->response.code); |
34196f82 SO |
813 | goto out; |
814 | } | |
815 | if (scmc_area->not_valid) { | |
816 | chp->cmg = -1; | |
817 | chp->shared = -1; | |
818 | goto out; | |
819 | } | |
820 | chp->cmg = scmc_area->cmg; | |
821 | chp->shared = scmc_area->shared; | |
822 | if (chp->cmg != 2 && chp->cmg != 3) { | |
823 | /* No cmg-dependent data. */ | |
824 | goto out; | |
495a5b45 | 825 | } |
34196f82 SO |
826 | chp->cmg_chars = cmg_chars; |
827 | chsc_initialize_cmg_chars(chp, scmc_area->cmcv, | |
828 | (struct cmg_chars *) &scmc_area->data); | |
495a5b45 | 829 | out: |
34196f82 SO |
830 | spin_unlock_irq(&chsc_page_lock); |
831 | if (!chp->cmg_chars) | |
832 | kfree(cmg_chars); | |
833 | ||
495a5b45 CH |
834 | return ret; |
835 | } | |
836 | ||
34aec07c | 837 | int __init chsc_init(void) |
1da177e4 | 838 | { |
c1156189 CH |
839 | int ret; |
840 | ||
1da177e4 | 841 | sei_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
34196f82 SO |
842 | chsc_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
843 | if (!sei_page || !chsc_page) { | |
844 | ret = -ENOMEM; | |
845 | goto out_err; | |
c1156189 | 846 | } |
f5daba1d | 847 | ret = crw_register_handler(CRW_RSC_CSS, chsc_process_crw); |
c1156189 | 848 | if (ret) |
34196f82 SO |
849 | goto out_err; |
850 | return ret; | |
851 | out_err: | |
852 | free_page((unsigned long)chsc_page); | |
853 | free_page((unsigned long)sei_page); | |
c1156189 | 854 | return ret; |
1da177e4 LT |
855 | } |
856 | ||
34aec07c | 857 | void __init chsc_init_cleanup(void) |
4434a38c | 858 | { |
f5daba1d | 859 | crw_unregister_handler(CRW_RSC_CSS); |
34196f82 | 860 | free_page((unsigned long)chsc_page); |
34aec07c | 861 | free_page((unsigned long)sei_page); |
4434a38c CH |
862 | } |
863 | ||
818c272b | 864 | int chsc_enable_facility(int operation_code) |
fb6958a5 | 865 | { |
34196f82 | 866 | unsigned long flags; |
fb6958a5 | 867 | int ret; |
34196f82 | 868 | struct { |
fb6958a5 CH |
869 | struct chsc_header request; |
870 | u8 reserved1:4; | |
871 | u8 format:4; | |
872 | u8 reserved2; | |
873 | u16 operation_code; | |
874 | u32 reserved3; | |
875 | u32 reserved4; | |
876 | u32 operation_data_area[252]; | |
877 | struct chsc_header response; | |
878 | u32 reserved5:4; | |
879 | u32 format2:4; | |
880 | u32 reserved6:24; | |
34196f82 | 881 | } __attribute__ ((packed)) *sda_area; |
fb6958a5 | 882 | |
34196f82 SO |
883 | spin_lock_irqsave(&chsc_page_lock, flags); |
884 | memset(chsc_page, 0, PAGE_SIZE); | |
885 | sda_area = chsc_page; | |
886 | sda_area->request.length = 0x0400; | |
887 | sda_area->request.code = 0x0031; | |
888 | sda_area->operation_code = operation_code; | |
fb6958a5 | 889 | |
34196f82 | 890 | ret = chsc(sda_area); |
fb6958a5 CH |
891 | if (ret > 0) { |
892 | ret = (ret == 3) ? -ENODEV : -EBUSY; | |
893 | goto out; | |
894 | } | |
b9c9a21a | 895 | |
34196f82 | 896 | switch (sda_area->response.code) { |
b9c9a21a | 897 | case 0x0101: |
fb6958a5 CH |
898 | ret = -EOPNOTSUPP; |
899 | break; | |
b9c9a21a | 900 | default: |
34196f82 | 901 | ret = chsc_error_from_response(sda_area->response.code); |
fb6958a5 | 902 | } |
b9c9a21a CH |
903 | if (ret != 0) |
904 | CIO_CRW_EVENT(2, "chsc: sda (oc=%x) failed (rc=%04x)\n", | |
34196f82 SO |
905 | operation_code, sda_area->response.code); |
906 | out: | |
907 | spin_unlock_irqrestore(&chsc_page_lock, flags); | |
fb6958a5 CH |
908 | return ret; |
909 | } | |
910 | ||
1da177e4 LT |
911 | struct css_general_char css_general_characteristics; |
912 | struct css_chsc_char css_chsc_characteristics; | |
913 | ||
914 | int __init | |
915 | chsc_determine_css_characteristics(void) | |
916 | { | |
917 | int result; | |
918 | struct { | |
919 | struct chsc_header request; | |
920 | u32 reserved1; | |
921 | u32 reserved2; | |
922 | u32 reserved3; | |
923 | struct chsc_header response; | |
924 | u32 reserved4; | |
925 | u32 general_char[510]; | |
34aec07c | 926 | u32 chsc_char[508]; |
0f008aa3 | 927 | } __attribute__ ((packed)) *scsc_area; |
1da177e4 | 928 | |
34196f82 SO |
929 | spin_lock_irq(&chsc_page_lock); |
930 | memset(chsc_page, 0, PAGE_SIZE); | |
931 | scsc_area = chsc_page; | |
495a5b45 CH |
932 | scsc_area->request.length = 0x0010; |
933 | scsc_area->request.code = 0x0010; | |
1da177e4 LT |
934 | |
935 | result = chsc(scsc_area); | |
936 | if (result) { | |
b9c9a21a | 937 | result = (result == 3) ? -ENODEV : -EBUSY; |
1da177e4 LT |
938 | goto exit; |
939 | } | |
940 | ||
b9c9a21a CH |
941 | result = chsc_error_from_response(scsc_area->response.code); |
942 | if (result == 0) { | |
943 | memcpy(&css_general_characteristics, scsc_area->general_char, | |
944 | sizeof(css_general_characteristics)); | |
945 | memcpy(&css_chsc_characteristics, scsc_area->chsc_char, | |
946 | sizeof(css_chsc_characteristics)); | |
947 | } else | |
948 | CIO_CRW_EVENT(2, "chsc: scsc failed (rc=%04x)\n", | |
949 | scsc_area->response.code); | |
1da177e4 | 950 | exit: |
34196f82 | 951 | spin_unlock_irq(&chsc_page_lock); |
1da177e4 LT |
952 | return result; |
953 | } | |
954 | ||
955 | EXPORT_SYMBOL_GPL(css_general_characteristics); | |
956 | EXPORT_SYMBOL_GPL(css_chsc_characteristics); | |
d2fec595 MS |
957 | |
958 | int chsc_sstpc(void *page, unsigned int op, u16 ctrl) | |
959 | { | |
960 | struct { | |
961 | struct chsc_header request; | |
962 | unsigned int rsvd0; | |
963 | unsigned int op : 8; | |
964 | unsigned int rsvd1 : 8; | |
965 | unsigned int ctrl : 16; | |
966 | unsigned int rsvd2[5]; | |
967 | struct chsc_header response; | |
968 | unsigned int rsvd3[7]; | |
969 | } __attribute__ ((packed)) *rr; | |
970 | int rc; | |
971 | ||
972 | memset(page, 0, PAGE_SIZE); | |
973 | rr = page; | |
974 | rr->request.length = 0x0020; | |
975 | rr->request.code = 0x0033; | |
976 | rr->op = op; | |
977 | rr->ctrl = ctrl; | |
978 | rc = chsc(rr); | |
979 | if (rc) | |
980 | return -EIO; | |
981 | rc = (rr->response.code == 0x0001) ? 0 : -EIO; | |
982 | return rc; | |
983 | } | |
984 | ||
985 | int chsc_sstpi(void *page, void *result, size_t size) | |
986 | { | |
987 | struct { | |
988 | struct chsc_header request; | |
989 | unsigned int rsvd0[3]; | |
990 | struct chsc_header response; | |
991 | char data[size]; | |
992 | } __attribute__ ((packed)) *rr; | |
993 | int rc; | |
994 | ||
995 | memset(page, 0, PAGE_SIZE); | |
996 | rr = page; | |
997 | rr->request.length = 0x0010; | |
998 | rr->request.code = 0x0038; | |
999 | rc = chsc(rr); | |
1000 | if (rc) | |
1001 | return -EIO; | |
1002 | memcpy(result, &rr->data, size); | |
1003 | return (rr->response.code == 0x0001) ? 0 : -EIO; | |
1004 | } | |
1005 | ||
fd0457a6 ME |
1006 | int chsc_siosl(struct subchannel_id schid) |
1007 | { | |
34196f82 SO |
1008 | struct { |
1009 | struct chsc_header request; | |
1010 | u32 word1; | |
1011 | struct subchannel_id sid; | |
1012 | u32 word3; | |
1013 | struct chsc_header response; | |
1014 | u32 word[11]; | |
1015 | } __attribute__ ((packed)) *siosl_area; | |
fd0457a6 ME |
1016 | unsigned long flags; |
1017 | int ccode; | |
1018 | int rc; | |
1019 | ||
34196f82 SO |
1020 | spin_lock_irqsave(&chsc_page_lock, flags); |
1021 | memset(chsc_page, 0, PAGE_SIZE); | |
1022 | siosl_area = chsc_page; | |
1023 | siosl_area->request.length = 0x0010; | |
1024 | siosl_area->request.code = 0x0046; | |
1025 | siosl_area->word1 = 0x80000000; | |
1026 | siosl_area->sid = schid; | |
fd0457a6 | 1027 | |
34196f82 | 1028 | ccode = chsc(siosl_area); |
fd0457a6 ME |
1029 | if (ccode > 0) { |
1030 | if (ccode == 3) | |
1031 | rc = -ENODEV; | |
1032 | else | |
1033 | rc = -EBUSY; | |
1034 | CIO_MSG_EVENT(2, "chsc: chsc failed for 0.%x.%04x (ccode=%d)\n", | |
1035 | schid.ssid, schid.sch_no, ccode); | |
1036 | goto out; | |
1037 | } | |
34196f82 | 1038 | rc = chsc_error_from_response(siosl_area->response.code); |
fd0457a6 ME |
1039 | if (rc) |
1040 | CIO_MSG_EVENT(2, "chsc: siosl failed for 0.%x.%04x (rc=%04x)\n", | |
1041 | schid.ssid, schid.sch_no, | |
34196f82 | 1042 | siosl_area->response.code); |
fd0457a6 ME |
1043 | else |
1044 | CIO_MSG_EVENT(4, "chsc: siosl succeeded for 0.%x.%04x\n", | |
1045 | schid.ssid, schid.sch_no); | |
1046 | out: | |
34196f82 | 1047 | spin_unlock_irqrestore(&chsc_page_lock, flags); |
fd0457a6 ME |
1048 | return rc; |
1049 | } | |
1050 | EXPORT_SYMBOL_GPL(chsc_siosl); |