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Commit | Line | Data |
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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 | ||
e5854a58 PO |
329 | struct chp_config_data { |
330 | u8 map[32]; | |
331 | u8 op; | |
332 | u8 pc; | |
333 | }; | |
334 | ||
83b3370c | 335 | static void chsc_process_sei_chp_config(struct chsc_sei_area *sei_area) |
e5854a58 PO |
336 | { |
337 | struct chp_config_data *data; | |
338 | struct chp_id chpid; | |
339 | int num; | |
e6d5a428 | 340 | char *events[3] = {"configure", "deconfigure", "cancel deconfigure"}; |
e5854a58 PO |
341 | |
342 | CIO_CRW_EVENT(4, "chsc: channel-path-configuration notification\n"); | |
343 | if (sei_area->rs != 0) | |
83b3370c | 344 | return; |
e5854a58 PO |
345 | data = (struct chp_config_data *) &(sei_area->ccdf); |
346 | chp_id_init(&chpid); | |
347 | for (num = 0; num <= __MAX_CHPID; num++) { | |
348 | if (!chp_test_bit(data->map, num)) | |
349 | continue; | |
350 | chpid.id = num; | |
e6d5a428 ME |
351 | pr_notice("Processing %s for channel path %x.%02x\n", |
352 | events[data->op], chpid.cssid, chpid.id); | |
e5854a58 PO |
353 | switch (data->op) { |
354 | case 0: | |
355 | chp_cfg_schedule(chpid, 1); | |
356 | break; | |
357 | case 1: | |
358 | chp_cfg_schedule(chpid, 0); | |
359 | break; | |
360 | case 2: | |
361 | chp_cfg_cancel_deconfigure(chpid); | |
362 | break; | |
363 | } | |
364 | } | |
e5854a58 PO |
365 | } |
366 | ||
83b3370c | 367 | static void chsc_process_sei(struct chsc_sei_area *sei_area) |
184357a5 | 368 | { |
184357a5 | 369 | /* Check if we might have lost some information. */ |
83b3370c | 370 | if (sei_area->flags & 0x40) { |
184357a5 | 371 | CIO_CRW_EVENT(2, "chsc: event overflow\n"); |
83b3370c PO |
372 | css_schedule_eval_all(); |
373 | } | |
184357a5 | 374 | /* which kind of information was stored? */ |
184357a5 PO |
375 | switch (sei_area->cc) { |
376 | case 1: /* link incident*/ | |
83b3370c | 377 | chsc_process_sei_link_incident(sei_area); |
184357a5 PO |
378 | break; |
379 | case 2: /* i/o resource accessibiliy */ | |
83b3370c | 380 | chsc_process_sei_res_acc(sei_area); |
184357a5 | 381 | break; |
e5854a58 | 382 | case 8: /* channel-path-configuration notification */ |
83b3370c | 383 | chsc_process_sei_chp_config(sei_area); |
e5854a58 | 384 | break; |
184357a5 PO |
385 | default: /* other stuff */ |
386 | CIO_CRW_EVENT(4, "chsc: unhandled sei content code %d\n", | |
387 | sei_area->cc); | |
388 | break; | |
389 | } | |
184357a5 PO |
390 | } |
391 | ||
c1156189 | 392 | static void chsc_process_crw(struct crw *crw0, struct crw *crw1, int overflow) |
184357a5 PO |
393 | { |
394 | struct chsc_sei_area *sei_area; | |
1da177e4 | 395 | |
c1156189 CH |
396 | if (overflow) { |
397 | css_schedule_eval_all(); | |
398 | return; | |
399 | } | |
400 | CIO_CRW_EVENT(2, "CRW reports slct=%d, oflw=%d, " | |
401 | "chn=%d, rsc=%X, anc=%d, erc=%X, rsid=%X\n", | |
402 | crw0->slct, crw0->oflw, crw0->chn, crw0->rsc, crw0->anc, | |
403 | crw0->erc, crw0->rsid); | |
1da177e4 | 404 | if (!sei_page) |
83b3370c | 405 | return; |
184357a5 PO |
406 | /* Access to sei_page is serialized through machine check handler |
407 | * thread, so no need for locking. */ | |
1da177e4 LT |
408 | sei_area = sei_page; |
409 | ||
c1156189 | 410 | CIO_TRACE_EVENT(2, "prcss"); |
1da177e4 | 411 | do { |
1da177e4 | 412 | memset(sei_area, 0, sizeof(*sei_area)); |
495a5b45 CH |
413 | sei_area->request.length = 0x0010; |
414 | sei_area->request.code = 0x000e; | |
184357a5 PO |
415 | if (chsc(sei_area)) |
416 | break; | |
1da177e4 | 417 | |
184357a5 PO |
418 | if (sei_area->response.code == 0x0001) { |
419 | CIO_CRW_EVENT(4, "chsc: sei successful\n"); | |
83b3370c | 420 | chsc_process_sei(sei_area); |
184357a5 PO |
421 | } else { |
422 | CIO_CRW_EVENT(2, "chsc: sei failed (rc=%04x)\n", | |
1da177e4 | 423 | sei_area->response.code); |
1da177e4 LT |
424 | break; |
425 | } | |
426 | } while (sei_area->flags & 0x80); | |
1da177e4 LT |
427 | } |
428 | ||
83b3370c | 429 | void chsc_chp_online(struct chp_id chpid) |
f97a56fb | 430 | { |
1da177e4 | 431 | char dbf_txt[15]; |
99611f87 | 432 | struct chp_link link; |
1da177e4 | 433 | |
f86635fa | 434 | sprintf(dbf_txt, "cadd%x.%02x", chpid.cssid, chpid.id); |
1da177e4 LT |
435 | CIO_TRACE_EVENT(2, dbf_txt); |
436 | ||
22806dc1 | 437 | if (chp_get_status(chpid) != 0) { |
99611f87 CH |
438 | memset(&link, 0, sizeof(struct chp_link)); |
439 | link.chpid = chpid; | |
22806dc1 CH |
440 | /* Wait until previous actions have settled. */ |
441 | css_wait_for_slow_path(); | |
c820de39 | 442 | for_each_subchannel_staged(__s390_process_res_acc, NULL, |
99611f87 | 443 | &link); |
22806dc1 | 444 | } |
1da177e4 LT |
445 | } |
446 | ||
f86635fa PO |
447 | static void __s390_subchannel_vary_chpid(struct subchannel *sch, |
448 | struct chp_id chpid, int on) | |
1da177e4 | 449 | { |
1da177e4 | 450 | unsigned long flags; |
99611f87 | 451 | struct chp_link link; |
1da177e4 | 452 | |
99611f87 CH |
453 | memset(&link, 0, sizeof(struct chp_link)); |
454 | link.chpid = chpid; | |
2ec22984 | 455 | spin_lock_irqsave(sch->lock, flags); |
c820de39 | 456 | if (sch->driver && sch->driver->chp_event) |
99611f87 | 457 | sch->driver->chp_event(sch, &link, |
c820de39 | 458 | on ? CHP_VARY_ON : CHP_VARY_OFF); |
2ec22984 | 459 | spin_unlock_irqrestore(sch->lock, flags); |
1da177e4 LT |
460 | } |
461 | ||
e82a1567 | 462 | static int s390_subchannel_vary_chpid_off(struct subchannel *sch, void *data) |
1da177e4 | 463 | { |
e82a1567 | 464 | struct chp_id *chpid = data; |
1da177e4 LT |
465 | |
466 | __s390_subchannel_vary_chpid(sch, *chpid, 0); | |
467 | return 0; | |
468 | } | |
469 | ||
e82a1567 | 470 | static int s390_subchannel_vary_chpid_on(struct subchannel *sch, void *data) |
1da177e4 | 471 | { |
e82a1567 | 472 | struct chp_id *chpid = data; |
1da177e4 LT |
473 | |
474 | __s390_subchannel_vary_chpid(sch, *chpid, 1); | |
475 | return 0; | |
476 | } | |
477 | ||
f97a56fb CH |
478 | static int |
479 | __s390_vary_chpid_on(struct subchannel_id schid, void *data) | |
480 | { | |
481 | struct schib schib; | |
f97a56fb | 482 | |
fb6958a5 | 483 | if (stsch_err(schid, &schib)) |
f97a56fb CH |
484 | /* We're through */ |
485 | return -ENXIO; | |
486 | /* Put it on the slow path. */ | |
83b3370c | 487 | css_schedule_eval(schid); |
f97a56fb CH |
488 | return 0; |
489 | } | |
490 | ||
e6b6e10a PO |
491 | /** |
492 | * chsc_chp_vary - propagate channel-path vary operation to subchannels | |
493 | * @chpid: channl-path ID | |
494 | * @on: non-zero for vary online, zero for vary offline | |
1da177e4 | 495 | */ |
e6b6e10a | 496 | int chsc_chp_vary(struct chp_id chpid, int on) |
1da177e4 | 497 | { |
c38a90a3 | 498 | struct channel_path *chp = chpid_to_chp(chpid); |
99611f87 CH |
499 | struct chp_link link; |
500 | ||
501 | memset(&link, 0, sizeof(struct chp_link)); | |
502 | link.chpid = chpid; | |
22806dc1 CH |
503 | /* Wait until previous actions have settled. */ |
504 | css_wait_for_slow_path(); | |
1da177e4 LT |
505 | /* |
506 | * Redo PathVerification on the devices the chpid connects to | |
507 | */ | |
c38a90a3 SO |
508 | if (on) { |
509 | /* Try to update the channel path descritor. */ | |
510 | chsc_determine_base_channel_path_desc(chpid, &chp->desc); | |
e82a1567 | 511 | for_each_subchannel_staged(s390_subchannel_vary_chpid_on, |
99611f87 | 512 | __s390_vary_chpid_on, &link); |
c38a90a3 | 513 | } else |
e82a1567 | 514 | for_each_subchannel_staged(s390_subchannel_vary_chpid_off, |
99611f87 | 515 | NULL, &link); |
e82a1567 | 516 | |
1da177e4 LT |
517 | return 0; |
518 | } | |
519 | ||
495a5b45 CH |
520 | static void |
521 | chsc_remove_cmg_attr(struct channel_subsystem *css) | |
522 | { | |
523 | int i; | |
524 | ||
525 | for (i = 0; i <= __MAX_CHPID; i++) { | |
526 | if (!css->chps[i]) | |
527 | continue; | |
e6b6e10a | 528 | chp_remove_cmg_attr(css->chps[i]); |
495a5b45 CH |
529 | } |
530 | } | |
531 | ||
532 | static int | |
533 | chsc_add_cmg_attr(struct channel_subsystem *css) | |
534 | { | |
535 | int i, ret; | |
536 | ||
537 | ret = 0; | |
538 | for (i = 0; i <= __MAX_CHPID; i++) { | |
539 | if (!css->chps[i]) | |
540 | continue; | |
e6b6e10a | 541 | ret = chp_add_cmg_attr(css->chps[i]); |
495a5b45 CH |
542 | if (ret) |
543 | goto cleanup; | |
544 | } | |
545 | return ret; | |
546 | cleanup: | |
547 | for (--i; i >= 0; i--) { | |
548 | if (!css->chps[i]) | |
549 | continue; | |
e6b6e10a | 550 | chp_remove_cmg_attr(css->chps[i]); |
495a5b45 CH |
551 | } |
552 | return ret; | |
553 | } | |
554 | ||
34196f82 | 555 | int __chsc_do_secm(struct channel_subsystem *css, int enable) |
495a5b45 CH |
556 | { |
557 | struct { | |
558 | struct chsc_header request; | |
559 | u32 operation_code : 2; | |
560 | u32 : 30; | |
561 | u32 key : 4; | |
562 | u32 : 28; | |
563 | u32 zeroes1; | |
564 | u32 cub_addr1; | |
565 | u32 zeroes2; | |
566 | u32 cub_addr2; | |
567 | u32 reserved[13]; | |
568 | struct chsc_header response; | |
569 | u32 status : 8; | |
570 | u32 : 4; | |
571 | u32 fmt : 4; | |
572 | u32 : 16; | |
0f008aa3 | 573 | } __attribute__ ((packed)) *secm_area; |
495a5b45 CH |
574 | int ret, ccode; |
575 | ||
34196f82 SO |
576 | spin_lock_irq(&chsc_page_lock); |
577 | memset(chsc_page, 0, PAGE_SIZE); | |
578 | secm_area = chsc_page; | |
495a5b45 CH |
579 | secm_area->request.length = 0x0050; |
580 | secm_area->request.code = 0x0016; | |
581 | ||
d1bf8590 | 582 | secm_area->key = PAGE_DEFAULT_KEY >> 4; |
495a5b45 CH |
583 | secm_area->cub_addr1 = (u64)(unsigned long)css->cub_addr1; |
584 | secm_area->cub_addr2 = (u64)(unsigned long)css->cub_addr2; | |
585 | ||
586 | secm_area->operation_code = enable ? 0 : 1; | |
587 | ||
588 | ccode = chsc(secm_area); | |
34196f82 SO |
589 | if (ccode > 0) { |
590 | ret = (ccode == 3) ? -ENODEV : -EBUSY; | |
591 | goto out; | |
592 | } | |
495a5b45 CH |
593 | |
594 | switch (secm_area->response.code) { | |
b9c9a21a CH |
595 | case 0x0102: |
596 | case 0x0103: | |
495a5b45 | 597 | ret = -EINVAL; |
17e7d87d | 598 | break; |
495a5b45 | 599 | default: |
b9c9a21a | 600 | ret = chsc_error_from_response(secm_area->response.code); |
495a5b45 | 601 | } |
b9c9a21a CH |
602 | if (ret != 0) |
603 | CIO_CRW_EVENT(2, "chsc: secm failed (rc=%04x)\n", | |
604 | secm_area->response.code); | |
34196f82 SO |
605 | out: |
606 | spin_unlock_irq(&chsc_page_lock); | |
495a5b45 CH |
607 | return ret; |
608 | } | |
609 | ||
610 | int | |
611 | chsc_secm(struct channel_subsystem *css, int enable) | |
612 | { | |
495a5b45 CH |
613 | int ret; |
614 | ||
495a5b45 CH |
615 | if (enable && !css->cm_enabled) { |
616 | css->cub_addr1 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
617 | css->cub_addr2 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
618 | if (!css->cub_addr1 || !css->cub_addr2) { | |
619 | free_page((unsigned long)css->cub_addr1); | |
620 | free_page((unsigned long)css->cub_addr2); | |
495a5b45 CH |
621 | return -ENOMEM; |
622 | } | |
623 | } | |
34196f82 | 624 | ret = __chsc_do_secm(css, enable); |
495a5b45 CH |
625 | if (!ret) { |
626 | css->cm_enabled = enable; | |
627 | if (css->cm_enabled) { | |
628 | ret = chsc_add_cmg_attr(css); | |
629 | if (ret) { | |
34196f82 | 630 | __chsc_do_secm(css, 0); |
495a5b45 CH |
631 | css->cm_enabled = 0; |
632 | } | |
633 | } else | |
634 | chsc_remove_cmg_attr(css); | |
635 | } | |
8c4941c5 | 636 | if (!css->cm_enabled) { |
495a5b45 CH |
637 | free_page((unsigned long)css->cub_addr1); |
638 | free_page((unsigned long)css->cub_addr2); | |
639 | } | |
495a5b45 CH |
640 | return ret; |
641 | } | |
642 | ||
9d92a7e1 | 643 | int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt, |
906c9768 | 644 | int c, int m, void *page) |
1da177e4 | 645 | { |
906c9768 | 646 | struct chsc_scpd *scpd_area; |
1da177e4 LT |
647 | int ccode, ret; |
648 | ||
9d92a7e1 CH |
649 | if ((rfmt == 1) && !css_general_characteristics.fcs) |
650 | return -EINVAL; | |
651 | if ((rfmt == 2) && !css_general_characteristics.cib) | |
652 | return -EINVAL; | |
1da177e4 | 653 | |
906c9768 SO |
654 | memset(page, 0, PAGE_SIZE); |
655 | scpd_area = page; | |
495a5b45 CH |
656 | scpd_area->request.length = 0x0010; |
657 | scpd_area->request.code = 0x0002; | |
9d92a7e1 | 658 | scpd_area->cssid = chpid.cssid; |
f86635fa PO |
659 | scpd_area->first_chpid = chpid.id; |
660 | scpd_area->last_chpid = chpid.id; | |
9d92a7e1 CH |
661 | scpd_area->m = m; |
662 | scpd_area->c = c; | |
663 | scpd_area->fmt = fmt; | |
664 | scpd_area->rfmt = rfmt; | |
1da177e4 LT |
665 | |
666 | ccode = chsc(scpd_area); | |
906c9768 SO |
667 | if (ccode > 0) |
668 | return (ccode == 3) ? -ENODEV : -EBUSY; | |
1da177e4 | 669 | |
b9c9a21a | 670 | ret = chsc_error_from_response(scpd_area->response.code); |
906c9768 | 671 | if (ret) |
b9c9a21a | 672 | CIO_CRW_EVENT(2, "chsc: scpd failed (rc=%04x)\n", |
1da177e4 | 673 | scpd_area->response.code); |
1da177e4 LT |
674 | return ret; |
675 | } | |
9d92a7e1 CH |
676 | EXPORT_SYMBOL_GPL(chsc_determine_channel_path_desc); |
677 | ||
678 | int chsc_determine_base_channel_path_desc(struct chp_id chpid, | |
679 | struct channel_path_desc *desc) | |
680 | { | |
681 | struct chsc_response_struct *chsc_resp; | |
906c9768 | 682 | struct chsc_scpd *scpd_area; |
62da177a | 683 | unsigned long flags; |
9d92a7e1 CH |
684 | int ret; |
685 | ||
62da177a | 686 | spin_lock_irqsave(&chsc_page_lock, flags); |
906c9768 SO |
687 | scpd_area = chsc_page; |
688 | ret = chsc_determine_channel_path_desc(chpid, 0, 0, 0, 0, scpd_area); | |
9d92a7e1 | 689 | if (ret) |
906c9768 SO |
690 | goto out; |
691 | chsc_resp = (void *)&scpd_area->response; | |
878c4956 | 692 | memcpy(desc, &chsc_resp->data, sizeof(*desc)); |
906c9768 | 693 | out: |
62da177a | 694 | spin_unlock_irqrestore(&chsc_page_lock, flags); |
9d92a7e1 CH |
695 | return ret; |
696 | } | |
1da177e4 | 697 | |
495a5b45 CH |
698 | static void |
699 | chsc_initialize_cmg_chars(struct channel_path *chp, u8 cmcv, | |
700 | struct cmg_chars *chars) | |
701 | { | |
34196f82 SO |
702 | struct cmg_chars *cmg_chars; |
703 | int i, mask; | |
704 | ||
705 | cmg_chars = chp->cmg_chars; | |
706 | for (i = 0; i < NR_MEASUREMENT_CHARS; i++) { | |
707 | mask = 0x80 >> (i + 3); | |
708 | if (cmcv & mask) | |
709 | cmg_chars->values[i] = chars->values[i]; | |
710 | else | |
711 | cmg_chars->values[i] = 0; | |
495a5b45 CH |
712 | } |
713 | } | |
714 | ||
e6b6e10a | 715 | int chsc_get_channel_measurement_chars(struct channel_path *chp) |
495a5b45 | 716 | { |
34196f82 | 717 | struct cmg_chars *cmg_chars; |
495a5b45 CH |
718 | int ccode, ret; |
719 | ||
720 | struct { | |
721 | struct chsc_header request; | |
722 | u32 : 24; | |
723 | u32 first_chpid : 8; | |
724 | u32 : 24; | |
725 | u32 last_chpid : 8; | |
726 | u32 zeroes1; | |
727 | struct chsc_header response; | |
728 | u32 zeroes2; | |
729 | u32 not_valid : 1; | |
730 | u32 shared : 1; | |
731 | u32 : 22; | |
732 | u32 chpid : 8; | |
733 | u32 cmcv : 5; | |
734 | u32 : 11; | |
735 | u32 cmgq : 8; | |
736 | u32 cmg : 8; | |
737 | u32 zeroes3; | |
738 | u32 data[NR_MEASUREMENT_CHARS]; | |
0f008aa3 | 739 | } __attribute__ ((packed)) *scmc_area; |
495a5b45 | 740 | |
34196f82 SO |
741 | chp->cmg_chars = NULL; |
742 | cmg_chars = kmalloc(sizeof(*cmg_chars), GFP_KERNEL); | |
743 | if (!cmg_chars) | |
495a5b45 CH |
744 | return -ENOMEM; |
745 | ||
34196f82 SO |
746 | spin_lock_irq(&chsc_page_lock); |
747 | memset(chsc_page, 0, PAGE_SIZE); | |
748 | scmc_area = chsc_page; | |
495a5b45 CH |
749 | scmc_area->request.length = 0x0010; |
750 | scmc_area->request.code = 0x0022; | |
f86635fa PO |
751 | scmc_area->first_chpid = chp->chpid.id; |
752 | scmc_area->last_chpid = chp->chpid.id; | |
495a5b45 CH |
753 | |
754 | ccode = chsc(scmc_area); | |
755 | if (ccode > 0) { | |
756 | ret = (ccode == 3) ? -ENODEV : -EBUSY; | |
757 | goto out; | |
758 | } | |
759 | ||
b9c9a21a | 760 | ret = chsc_error_from_response(scmc_area->response.code); |
34196f82 | 761 | if (ret) { |
b9c9a21a | 762 | CIO_CRW_EVENT(2, "chsc: scmc failed (rc=%04x)\n", |
495a5b45 | 763 | scmc_area->response.code); |
34196f82 SO |
764 | goto out; |
765 | } | |
766 | if (scmc_area->not_valid) { | |
767 | chp->cmg = -1; | |
768 | chp->shared = -1; | |
769 | goto out; | |
770 | } | |
771 | chp->cmg = scmc_area->cmg; | |
772 | chp->shared = scmc_area->shared; | |
773 | if (chp->cmg != 2 && chp->cmg != 3) { | |
774 | /* No cmg-dependent data. */ | |
775 | goto out; | |
495a5b45 | 776 | } |
34196f82 SO |
777 | chp->cmg_chars = cmg_chars; |
778 | chsc_initialize_cmg_chars(chp, scmc_area->cmcv, | |
779 | (struct cmg_chars *) &scmc_area->data); | |
495a5b45 | 780 | out: |
34196f82 SO |
781 | spin_unlock_irq(&chsc_page_lock); |
782 | if (!chp->cmg_chars) | |
783 | kfree(cmg_chars); | |
784 | ||
495a5b45 CH |
785 | return ret; |
786 | } | |
787 | ||
34aec07c | 788 | int __init chsc_init(void) |
1da177e4 | 789 | { |
c1156189 CH |
790 | int ret; |
791 | ||
1da177e4 | 792 | sei_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
34196f82 SO |
793 | chsc_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
794 | if (!sei_page || !chsc_page) { | |
795 | ret = -ENOMEM; | |
796 | goto out_err; | |
c1156189 | 797 | } |
f5daba1d | 798 | ret = crw_register_handler(CRW_RSC_CSS, chsc_process_crw); |
c1156189 | 799 | if (ret) |
34196f82 SO |
800 | goto out_err; |
801 | return ret; | |
802 | out_err: | |
803 | free_page((unsigned long)chsc_page); | |
804 | free_page((unsigned long)sei_page); | |
c1156189 | 805 | return ret; |
1da177e4 LT |
806 | } |
807 | ||
34aec07c | 808 | void __init chsc_init_cleanup(void) |
4434a38c | 809 | { |
f5daba1d | 810 | crw_unregister_handler(CRW_RSC_CSS); |
34196f82 | 811 | free_page((unsigned long)chsc_page); |
34aec07c | 812 | free_page((unsigned long)sei_page); |
4434a38c CH |
813 | } |
814 | ||
818c272b | 815 | int chsc_enable_facility(int operation_code) |
fb6958a5 | 816 | { |
34196f82 | 817 | unsigned long flags; |
fb6958a5 | 818 | int ret; |
34196f82 | 819 | struct { |
fb6958a5 CH |
820 | struct chsc_header request; |
821 | u8 reserved1:4; | |
822 | u8 format:4; | |
823 | u8 reserved2; | |
824 | u16 operation_code; | |
825 | u32 reserved3; | |
826 | u32 reserved4; | |
827 | u32 operation_data_area[252]; | |
828 | struct chsc_header response; | |
829 | u32 reserved5:4; | |
830 | u32 format2:4; | |
831 | u32 reserved6:24; | |
34196f82 | 832 | } __attribute__ ((packed)) *sda_area; |
fb6958a5 | 833 | |
34196f82 SO |
834 | spin_lock_irqsave(&chsc_page_lock, flags); |
835 | memset(chsc_page, 0, PAGE_SIZE); | |
836 | sda_area = chsc_page; | |
837 | sda_area->request.length = 0x0400; | |
838 | sda_area->request.code = 0x0031; | |
839 | sda_area->operation_code = operation_code; | |
fb6958a5 | 840 | |
34196f82 | 841 | ret = chsc(sda_area); |
fb6958a5 CH |
842 | if (ret > 0) { |
843 | ret = (ret == 3) ? -ENODEV : -EBUSY; | |
844 | goto out; | |
845 | } | |
b9c9a21a | 846 | |
34196f82 | 847 | switch (sda_area->response.code) { |
b9c9a21a | 848 | case 0x0101: |
fb6958a5 CH |
849 | ret = -EOPNOTSUPP; |
850 | break; | |
b9c9a21a | 851 | default: |
34196f82 | 852 | ret = chsc_error_from_response(sda_area->response.code); |
fb6958a5 | 853 | } |
b9c9a21a CH |
854 | if (ret != 0) |
855 | CIO_CRW_EVENT(2, "chsc: sda (oc=%x) failed (rc=%04x)\n", | |
34196f82 SO |
856 | operation_code, sda_area->response.code); |
857 | out: | |
858 | spin_unlock_irqrestore(&chsc_page_lock, flags); | |
fb6958a5 CH |
859 | return ret; |
860 | } | |
861 | ||
1da177e4 LT |
862 | struct css_general_char css_general_characteristics; |
863 | struct css_chsc_char css_chsc_characteristics; | |
864 | ||
865 | int __init | |
866 | chsc_determine_css_characteristics(void) | |
867 | { | |
868 | int result; | |
869 | struct { | |
870 | struct chsc_header request; | |
871 | u32 reserved1; | |
872 | u32 reserved2; | |
873 | u32 reserved3; | |
874 | struct chsc_header response; | |
875 | u32 reserved4; | |
876 | u32 general_char[510]; | |
34aec07c | 877 | u32 chsc_char[508]; |
0f008aa3 | 878 | } __attribute__ ((packed)) *scsc_area; |
1da177e4 | 879 | |
34196f82 SO |
880 | spin_lock_irq(&chsc_page_lock); |
881 | memset(chsc_page, 0, PAGE_SIZE); | |
882 | scsc_area = chsc_page; | |
495a5b45 CH |
883 | scsc_area->request.length = 0x0010; |
884 | scsc_area->request.code = 0x0010; | |
1da177e4 LT |
885 | |
886 | result = chsc(scsc_area); | |
887 | if (result) { | |
b9c9a21a | 888 | result = (result == 3) ? -ENODEV : -EBUSY; |
1da177e4 LT |
889 | goto exit; |
890 | } | |
891 | ||
b9c9a21a CH |
892 | result = chsc_error_from_response(scsc_area->response.code); |
893 | if (result == 0) { | |
894 | memcpy(&css_general_characteristics, scsc_area->general_char, | |
895 | sizeof(css_general_characteristics)); | |
896 | memcpy(&css_chsc_characteristics, scsc_area->chsc_char, | |
897 | sizeof(css_chsc_characteristics)); | |
898 | } else | |
899 | CIO_CRW_EVENT(2, "chsc: scsc failed (rc=%04x)\n", | |
900 | scsc_area->response.code); | |
1da177e4 | 901 | exit: |
34196f82 | 902 | spin_unlock_irq(&chsc_page_lock); |
1da177e4 LT |
903 | return result; |
904 | } | |
905 | ||
906 | EXPORT_SYMBOL_GPL(css_general_characteristics); | |
907 | EXPORT_SYMBOL_GPL(css_chsc_characteristics); | |
d2fec595 MS |
908 | |
909 | int chsc_sstpc(void *page, unsigned int op, u16 ctrl) | |
910 | { | |
911 | struct { | |
912 | struct chsc_header request; | |
913 | unsigned int rsvd0; | |
914 | unsigned int op : 8; | |
915 | unsigned int rsvd1 : 8; | |
916 | unsigned int ctrl : 16; | |
917 | unsigned int rsvd2[5]; | |
918 | struct chsc_header response; | |
919 | unsigned int rsvd3[7]; | |
920 | } __attribute__ ((packed)) *rr; | |
921 | int rc; | |
922 | ||
923 | memset(page, 0, PAGE_SIZE); | |
924 | rr = page; | |
925 | rr->request.length = 0x0020; | |
926 | rr->request.code = 0x0033; | |
927 | rr->op = op; | |
928 | rr->ctrl = ctrl; | |
929 | rc = chsc(rr); | |
930 | if (rc) | |
931 | return -EIO; | |
932 | rc = (rr->response.code == 0x0001) ? 0 : -EIO; | |
933 | return rc; | |
934 | } | |
935 | ||
936 | int chsc_sstpi(void *page, void *result, size_t size) | |
937 | { | |
938 | struct { | |
939 | struct chsc_header request; | |
940 | unsigned int rsvd0[3]; | |
941 | struct chsc_header response; | |
942 | char data[size]; | |
943 | } __attribute__ ((packed)) *rr; | |
944 | int rc; | |
945 | ||
946 | memset(page, 0, PAGE_SIZE); | |
947 | rr = page; | |
948 | rr->request.length = 0x0010; | |
949 | rr->request.code = 0x0038; | |
950 | rc = chsc(rr); | |
951 | if (rc) | |
952 | return -EIO; | |
953 | memcpy(result, &rr->data, size); | |
954 | return (rr->response.code == 0x0001) ? 0 : -EIO; | |
955 | } | |
956 | ||
fd0457a6 ME |
957 | int chsc_siosl(struct subchannel_id schid) |
958 | { | |
34196f82 SO |
959 | struct { |
960 | struct chsc_header request; | |
961 | u32 word1; | |
962 | struct subchannel_id sid; | |
963 | u32 word3; | |
964 | struct chsc_header response; | |
965 | u32 word[11]; | |
966 | } __attribute__ ((packed)) *siosl_area; | |
fd0457a6 ME |
967 | unsigned long flags; |
968 | int ccode; | |
969 | int rc; | |
970 | ||
34196f82 SO |
971 | spin_lock_irqsave(&chsc_page_lock, flags); |
972 | memset(chsc_page, 0, PAGE_SIZE); | |
973 | siosl_area = chsc_page; | |
974 | siosl_area->request.length = 0x0010; | |
975 | siosl_area->request.code = 0x0046; | |
976 | siosl_area->word1 = 0x80000000; | |
977 | siosl_area->sid = schid; | |
fd0457a6 | 978 | |
34196f82 | 979 | ccode = chsc(siosl_area); |
fd0457a6 ME |
980 | if (ccode > 0) { |
981 | if (ccode == 3) | |
982 | rc = -ENODEV; | |
983 | else | |
984 | rc = -EBUSY; | |
985 | CIO_MSG_EVENT(2, "chsc: chsc failed for 0.%x.%04x (ccode=%d)\n", | |
986 | schid.ssid, schid.sch_no, ccode); | |
987 | goto out; | |
988 | } | |
34196f82 | 989 | rc = chsc_error_from_response(siosl_area->response.code); |
fd0457a6 ME |
990 | if (rc) |
991 | CIO_MSG_EVENT(2, "chsc: siosl failed for 0.%x.%04x (rc=%04x)\n", | |
992 | schid.ssid, schid.sch_no, | |
34196f82 | 993 | siosl_area->response.code); |
fd0457a6 ME |
994 | else |
995 | CIO_MSG_EVENT(4, "chsc: siosl succeeded for 0.%x.%04x\n", | |
996 | schid.ssid, schid.sch_no); | |
997 | out: | |
34196f82 | 998 | spin_unlock_irqrestore(&chsc_page_lock, flags); |
fd0457a6 ME |
999 | return rc; |
1000 | } | |
1001 | EXPORT_SYMBOL_GPL(chsc_siosl); |