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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 | * |
c820de39 | 5 | * Copyright IBM Corp. 1999,2008 |
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 LT |
31 | static void *sei_page; |
32 | ||
dae39843 CH |
33 | /** |
34 | * chsc_error_from_response() - convert a chsc response to an error | |
35 | * @response: chsc response code | |
36 | * | |
37 | * Returns an appropriate Linux error code for @response. | |
38 | */ | |
39 | int chsc_error_from_response(int response) | |
b9c9a21a CH |
40 | { |
41 | switch (response) { | |
42 | case 0x0001: | |
43 | return 0; | |
44 | case 0x0002: | |
45 | case 0x0003: | |
46 | case 0x0006: | |
47 | case 0x0007: | |
48 | case 0x0008: | |
49 | case 0x000a: | |
50 | return -EINVAL; | |
51 | case 0x0004: | |
52 | return -EOPNOTSUPP; | |
53 | default: | |
54 | return -EIO; | |
55 | } | |
56 | } | |
dae39843 | 57 | EXPORT_SYMBOL_GPL(chsc_error_from_response); |
b9c9a21a | 58 | |
7ad6a249 PO |
59 | struct chsc_ssd_area { |
60 | struct chsc_header request; | |
61 | u16 :10; | |
62 | u16 ssid:2; | |
63 | u16 :4; | |
64 | u16 f_sch; /* first subchannel */ | |
65 | u16 :16; | |
66 | u16 l_sch; /* last subchannel */ | |
67 | u32 :32; | |
68 | struct chsc_header response; | |
69 | u32 :32; | |
70 | u8 sch_valid : 1; | |
71 | u8 dev_valid : 1; | |
72 | u8 st : 3; /* subchannel type */ | |
73 | u8 zeroes : 3; | |
74 | u8 unit_addr; /* unit address */ | |
75 | u16 devno; /* device number */ | |
76 | u8 path_mask; | |
77 | u8 fla_valid_mask; | |
78 | u16 sch; /* subchannel */ | |
79 | u8 chpid[8]; /* chpids 0-7 */ | |
80 | u16 fla[8]; /* full link addresses 0-7 */ | |
81 | } __attribute__ ((packed)); | |
82 | ||
83 | int chsc_get_ssd_info(struct subchannel_id schid, struct chsc_ssd_info *ssd) | |
1da177e4 | 84 | { |
7ad6a249 PO |
85 | unsigned long page; |
86 | struct chsc_ssd_area *ssd_area; | |
87 | int ccode; | |
88 | int ret; | |
89 | int i; | |
90 | int mask; | |
1da177e4 | 91 | |
7ad6a249 PO |
92 | page = get_zeroed_page(GFP_KERNEL | GFP_DMA); |
93 | if (!page) | |
94 | return -ENOMEM; | |
95 | ssd_area = (struct chsc_ssd_area *) 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 PO |
105 | ret = (ccode == 3) ? -ENODEV : -EBUSY; |
106 | goto out_free; | |
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); |
7ad6a249 | 113 | goto out_free; |
1da177e4 | 114 | } |
7ad6a249 PO |
115 | if (!ssd_area->sch_valid) { |
116 | ret = -ENODEV; | |
117 | goto out_free; | |
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)) | |
7ad6a249 PO |
124 | goto out_free; |
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 | } |
7ad6a249 PO |
136 | out_free: |
137 | free_page(page); | |
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 | ||
e5854a58 PO |
328 | struct chp_config_data { |
329 | u8 map[32]; | |
330 | u8 op; | |
331 | u8 pc; | |
332 | }; | |
333 | ||
83b3370c | 334 | static void chsc_process_sei_chp_config(struct chsc_sei_area *sei_area) |
e5854a58 PO |
335 | { |
336 | struct chp_config_data *data; | |
337 | struct chp_id chpid; | |
338 | int num; | |
e6d5a428 | 339 | char *events[3] = {"configure", "deconfigure", "cancel deconfigure"}; |
e5854a58 PO |
340 | |
341 | CIO_CRW_EVENT(4, "chsc: channel-path-configuration notification\n"); | |
342 | if (sei_area->rs != 0) | |
83b3370c | 343 | return; |
e5854a58 PO |
344 | data = (struct chp_config_data *) &(sei_area->ccdf); |
345 | chp_id_init(&chpid); | |
346 | for (num = 0; num <= __MAX_CHPID; num++) { | |
347 | if (!chp_test_bit(data->map, num)) | |
348 | continue; | |
349 | chpid.id = num; | |
e6d5a428 ME |
350 | pr_notice("Processing %s for channel path %x.%02x\n", |
351 | events[data->op], chpid.cssid, chpid.id); | |
e5854a58 PO |
352 | switch (data->op) { |
353 | case 0: | |
354 | chp_cfg_schedule(chpid, 1); | |
355 | break; | |
356 | case 1: | |
357 | chp_cfg_schedule(chpid, 0); | |
358 | break; | |
359 | case 2: | |
360 | chp_cfg_cancel_deconfigure(chpid); | |
361 | break; | |
362 | } | |
363 | } | |
e5854a58 PO |
364 | } |
365 | ||
83b3370c | 366 | static void chsc_process_sei(struct chsc_sei_area *sei_area) |
184357a5 | 367 | { |
184357a5 | 368 | /* Check if we might have lost some information. */ |
83b3370c | 369 | if (sei_area->flags & 0x40) { |
184357a5 | 370 | CIO_CRW_EVENT(2, "chsc: event overflow\n"); |
83b3370c PO |
371 | css_schedule_eval_all(); |
372 | } | |
184357a5 | 373 | /* which kind of information was stored? */ |
184357a5 PO |
374 | switch (sei_area->cc) { |
375 | case 1: /* link incident*/ | |
83b3370c | 376 | chsc_process_sei_link_incident(sei_area); |
184357a5 PO |
377 | break; |
378 | case 2: /* i/o resource accessibiliy */ | |
83b3370c | 379 | chsc_process_sei_res_acc(sei_area); |
184357a5 | 380 | break; |
e5854a58 | 381 | case 8: /* channel-path-configuration notification */ |
83b3370c | 382 | chsc_process_sei_chp_config(sei_area); |
e5854a58 | 383 | break; |
184357a5 PO |
384 | default: /* other stuff */ |
385 | CIO_CRW_EVENT(4, "chsc: unhandled sei content code %d\n", | |
386 | sei_area->cc); | |
387 | break; | |
388 | } | |
184357a5 PO |
389 | } |
390 | ||
c1156189 | 391 | static void chsc_process_crw(struct crw *crw0, struct crw *crw1, int overflow) |
184357a5 PO |
392 | { |
393 | struct chsc_sei_area *sei_area; | |
1da177e4 | 394 | |
c1156189 CH |
395 | if (overflow) { |
396 | css_schedule_eval_all(); | |
397 | return; | |
398 | } | |
399 | CIO_CRW_EVENT(2, "CRW reports slct=%d, oflw=%d, " | |
400 | "chn=%d, rsc=%X, anc=%d, erc=%X, rsid=%X\n", | |
401 | crw0->slct, crw0->oflw, crw0->chn, crw0->rsc, crw0->anc, | |
402 | crw0->erc, crw0->rsid); | |
1da177e4 | 403 | if (!sei_page) |
83b3370c | 404 | return; |
184357a5 PO |
405 | /* Access to sei_page is serialized through machine check handler |
406 | * thread, so no need for locking. */ | |
1da177e4 LT |
407 | sei_area = sei_page; |
408 | ||
c1156189 | 409 | CIO_TRACE_EVENT(2, "prcss"); |
1da177e4 | 410 | do { |
1da177e4 | 411 | memset(sei_area, 0, sizeof(*sei_area)); |
495a5b45 CH |
412 | sei_area->request.length = 0x0010; |
413 | sei_area->request.code = 0x000e; | |
184357a5 PO |
414 | if (chsc(sei_area)) |
415 | break; | |
1da177e4 | 416 | |
184357a5 PO |
417 | if (sei_area->response.code == 0x0001) { |
418 | CIO_CRW_EVENT(4, "chsc: sei successful\n"); | |
83b3370c | 419 | chsc_process_sei(sei_area); |
184357a5 PO |
420 | } else { |
421 | CIO_CRW_EVENT(2, "chsc: sei failed (rc=%04x)\n", | |
1da177e4 | 422 | sei_area->response.code); |
1da177e4 LT |
423 | break; |
424 | } | |
425 | } while (sei_area->flags & 0x80); | |
1da177e4 LT |
426 | } |
427 | ||
83b3370c | 428 | void chsc_chp_online(struct chp_id chpid) |
f97a56fb | 429 | { |
1da177e4 | 430 | char dbf_txt[15]; |
99611f87 | 431 | struct chp_link link; |
1da177e4 | 432 | |
f86635fa | 433 | sprintf(dbf_txt, "cadd%x.%02x", chpid.cssid, chpid.id); |
1da177e4 LT |
434 | CIO_TRACE_EVENT(2, dbf_txt); |
435 | ||
22806dc1 | 436 | if (chp_get_status(chpid) != 0) { |
99611f87 CH |
437 | memset(&link, 0, sizeof(struct chp_link)); |
438 | link.chpid = chpid; | |
22806dc1 CH |
439 | /* Wait until previous actions have settled. */ |
440 | css_wait_for_slow_path(); | |
c820de39 | 441 | for_each_subchannel_staged(__s390_process_res_acc, NULL, |
99611f87 | 442 | &link); |
22806dc1 | 443 | } |
1da177e4 LT |
444 | } |
445 | ||
f86635fa PO |
446 | static void __s390_subchannel_vary_chpid(struct subchannel *sch, |
447 | struct chp_id chpid, int on) | |
1da177e4 | 448 | { |
1da177e4 | 449 | unsigned long flags; |
99611f87 | 450 | struct chp_link link; |
1da177e4 | 451 | |
99611f87 CH |
452 | memset(&link, 0, sizeof(struct chp_link)); |
453 | link.chpid = chpid; | |
2ec22984 | 454 | spin_lock_irqsave(sch->lock, flags); |
c820de39 | 455 | if (sch->driver && sch->driver->chp_event) |
99611f87 | 456 | sch->driver->chp_event(sch, &link, |
c820de39 | 457 | on ? CHP_VARY_ON : CHP_VARY_OFF); |
2ec22984 | 458 | spin_unlock_irqrestore(sch->lock, flags); |
1da177e4 LT |
459 | } |
460 | ||
e82a1567 | 461 | static int s390_subchannel_vary_chpid_off(struct subchannel *sch, void *data) |
1da177e4 | 462 | { |
e82a1567 | 463 | struct chp_id *chpid = data; |
1da177e4 LT |
464 | |
465 | __s390_subchannel_vary_chpid(sch, *chpid, 0); | |
466 | return 0; | |
467 | } | |
468 | ||
e82a1567 | 469 | static int s390_subchannel_vary_chpid_on(struct subchannel *sch, void *data) |
1da177e4 | 470 | { |
e82a1567 | 471 | struct chp_id *chpid = data; |
1da177e4 LT |
472 | |
473 | __s390_subchannel_vary_chpid(sch, *chpid, 1); | |
474 | return 0; | |
475 | } | |
476 | ||
f97a56fb CH |
477 | static int |
478 | __s390_vary_chpid_on(struct subchannel_id schid, void *data) | |
479 | { | |
480 | struct schib schib; | |
f97a56fb | 481 | |
fb6958a5 | 482 | if (stsch_err(schid, &schib)) |
f97a56fb CH |
483 | /* We're through */ |
484 | return -ENXIO; | |
485 | /* Put it on the slow path. */ | |
83b3370c | 486 | css_schedule_eval(schid); |
f97a56fb CH |
487 | return 0; |
488 | } | |
489 | ||
e6b6e10a PO |
490 | /** |
491 | * chsc_chp_vary - propagate channel-path vary operation to subchannels | |
492 | * @chpid: channl-path ID | |
493 | * @on: non-zero for vary online, zero for vary offline | |
1da177e4 | 494 | */ |
e6b6e10a | 495 | int chsc_chp_vary(struct chp_id chpid, int on) |
1da177e4 | 496 | { |
99611f87 CH |
497 | struct chp_link link; |
498 | ||
499 | memset(&link, 0, sizeof(struct chp_link)); | |
500 | link.chpid = chpid; | |
22806dc1 CH |
501 | /* Wait until previous actions have settled. */ |
502 | css_wait_for_slow_path(); | |
1da177e4 LT |
503 | /* |
504 | * Redo PathVerification on the devices the chpid connects to | |
505 | */ | |
506 | ||
f97a56fb | 507 | if (on) |
e82a1567 | 508 | for_each_subchannel_staged(s390_subchannel_vary_chpid_on, |
99611f87 | 509 | __s390_vary_chpid_on, &link); |
e82a1567 PO |
510 | else |
511 | for_each_subchannel_staged(s390_subchannel_vary_chpid_off, | |
99611f87 | 512 | NULL, &link); |
e82a1567 | 513 | |
1da177e4 LT |
514 | return 0; |
515 | } | |
516 | ||
495a5b45 CH |
517 | static void |
518 | chsc_remove_cmg_attr(struct channel_subsystem *css) | |
519 | { | |
520 | int i; | |
521 | ||
522 | for (i = 0; i <= __MAX_CHPID; i++) { | |
523 | if (!css->chps[i]) | |
524 | continue; | |
e6b6e10a | 525 | chp_remove_cmg_attr(css->chps[i]); |
495a5b45 CH |
526 | } |
527 | } | |
528 | ||
529 | static int | |
530 | chsc_add_cmg_attr(struct channel_subsystem *css) | |
531 | { | |
532 | int i, ret; | |
533 | ||
534 | ret = 0; | |
535 | for (i = 0; i <= __MAX_CHPID; i++) { | |
536 | if (!css->chps[i]) | |
537 | continue; | |
e6b6e10a | 538 | ret = chp_add_cmg_attr(css->chps[i]); |
495a5b45 CH |
539 | if (ret) |
540 | goto cleanup; | |
541 | } | |
542 | return ret; | |
543 | cleanup: | |
544 | for (--i; i >= 0; i--) { | |
545 | if (!css->chps[i]) | |
546 | continue; | |
e6b6e10a | 547 | chp_remove_cmg_attr(css->chps[i]); |
495a5b45 CH |
548 | } |
549 | return ret; | |
550 | } | |
551 | ||
dcbd16d5 | 552 | int __chsc_do_secm(struct channel_subsystem *css, int enable, void *page) |
495a5b45 CH |
553 | { |
554 | struct { | |
555 | struct chsc_header request; | |
556 | u32 operation_code : 2; | |
557 | u32 : 30; | |
558 | u32 key : 4; | |
559 | u32 : 28; | |
560 | u32 zeroes1; | |
561 | u32 cub_addr1; | |
562 | u32 zeroes2; | |
563 | u32 cub_addr2; | |
564 | u32 reserved[13]; | |
565 | struct chsc_header response; | |
566 | u32 status : 8; | |
567 | u32 : 4; | |
568 | u32 fmt : 4; | |
569 | u32 : 16; | |
0f008aa3 | 570 | } __attribute__ ((packed)) *secm_area; |
495a5b45 CH |
571 | int ret, ccode; |
572 | ||
573 | secm_area = page; | |
574 | secm_area->request.length = 0x0050; | |
575 | secm_area->request.code = 0x0016; | |
576 | ||
577 | secm_area->key = PAGE_DEFAULT_KEY; | |
578 | secm_area->cub_addr1 = (u64)(unsigned long)css->cub_addr1; | |
579 | secm_area->cub_addr2 = (u64)(unsigned long)css->cub_addr2; | |
580 | ||
581 | secm_area->operation_code = enable ? 0 : 1; | |
582 | ||
583 | ccode = chsc(secm_area); | |
584 | if (ccode > 0) | |
585 | return (ccode == 3) ? -ENODEV : -EBUSY; | |
586 | ||
587 | switch (secm_area->response.code) { | |
b9c9a21a CH |
588 | case 0x0102: |
589 | case 0x0103: | |
495a5b45 | 590 | ret = -EINVAL; |
17e7d87d | 591 | break; |
495a5b45 | 592 | default: |
b9c9a21a | 593 | ret = chsc_error_from_response(secm_area->response.code); |
495a5b45 | 594 | } |
b9c9a21a CH |
595 | if (ret != 0) |
596 | CIO_CRW_EVENT(2, "chsc: secm failed (rc=%04x)\n", | |
597 | secm_area->response.code); | |
495a5b45 CH |
598 | return ret; |
599 | } | |
600 | ||
601 | int | |
602 | chsc_secm(struct channel_subsystem *css, int enable) | |
603 | { | |
604 | void *secm_area; | |
605 | int ret; | |
606 | ||
607 | secm_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
608 | if (!secm_area) | |
609 | return -ENOMEM; | |
610 | ||
495a5b45 CH |
611 | if (enable && !css->cm_enabled) { |
612 | css->cub_addr1 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
613 | css->cub_addr2 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
614 | if (!css->cub_addr1 || !css->cub_addr2) { | |
615 | free_page((unsigned long)css->cub_addr1); | |
616 | free_page((unsigned long)css->cub_addr2); | |
617 | free_page((unsigned long)secm_area); | |
495a5b45 CH |
618 | return -ENOMEM; |
619 | } | |
620 | } | |
621 | ret = __chsc_do_secm(css, enable, secm_area); | |
622 | if (!ret) { | |
623 | css->cm_enabled = enable; | |
624 | if (css->cm_enabled) { | |
625 | ret = chsc_add_cmg_attr(css); | |
626 | if (ret) { | |
627 | memset(secm_area, 0, PAGE_SIZE); | |
628 | __chsc_do_secm(css, 0, secm_area); | |
629 | css->cm_enabled = 0; | |
630 | } | |
631 | } else | |
632 | chsc_remove_cmg_attr(css); | |
633 | } | |
8c4941c5 | 634 | if (!css->cm_enabled) { |
495a5b45 CH |
635 | free_page((unsigned long)css->cub_addr1); |
636 | free_page((unsigned long)css->cub_addr2); | |
637 | } | |
495a5b45 CH |
638 | free_page((unsigned long)secm_area); |
639 | return ret; | |
640 | } | |
641 | ||
9d92a7e1 CH |
642 | int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt, |
643 | int c, int m, | |
644 | struct chsc_response_struct *resp) | |
1da177e4 LT |
645 | { |
646 | int ccode, ret; | |
647 | ||
648 | struct { | |
649 | struct chsc_header request; | |
9d92a7e1 CH |
650 | u32 : 2; |
651 | u32 m : 1; | |
652 | u32 c : 1; | |
653 | u32 fmt : 4; | |
654 | u32 cssid : 8; | |
655 | u32 : 4; | |
656 | u32 rfmt : 4; | |
1da177e4 LT |
657 | u32 first_chpid : 8; |
658 | u32 : 24; | |
659 | u32 last_chpid : 8; | |
660 | u32 zeroes1; | |
661 | struct chsc_header response; | |
9d92a7e1 | 662 | u8 data[PAGE_SIZE - 20]; |
0f008aa3 | 663 | } __attribute__ ((packed)) *scpd_area; |
1da177e4 | 664 | |
9d92a7e1 CH |
665 | if ((rfmt == 1) && !css_general_characteristics.fcs) |
666 | return -EINVAL; | |
667 | if ((rfmt == 2) && !css_general_characteristics.cib) | |
668 | return -EINVAL; | |
1da177e4 LT |
669 | scpd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
670 | if (!scpd_area) | |
671 | return -ENOMEM; | |
672 | ||
495a5b45 CH |
673 | scpd_area->request.length = 0x0010; |
674 | scpd_area->request.code = 0x0002; | |
1da177e4 | 675 | |
9d92a7e1 | 676 | scpd_area->cssid = chpid.cssid; |
f86635fa PO |
677 | scpd_area->first_chpid = chpid.id; |
678 | scpd_area->last_chpid = chpid.id; | |
9d92a7e1 CH |
679 | scpd_area->m = m; |
680 | scpd_area->c = c; | |
681 | scpd_area->fmt = fmt; | |
682 | scpd_area->rfmt = rfmt; | |
1da177e4 LT |
683 | |
684 | ccode = chsc(scpd_area); | |
685 | if (ccode > 0) { | |
686 | ret = (ccode == 3) ? -ENODEV : -EBUSY; | |
687 | goto out; | |
688 | } | |
689 | ||
b9c9a21a CH |
690 | ret = chsc_error_from_response(scpd_area->response.code); |
691 | if (ret == 0) | |
692 | /* Success. */ | |
9d92a7e1 | 693 | memcpy(resp, &scpd_area->response, scpd_area->response.length); |
b9c9a21a CH |
694 | else |
695 | CIO_CRW_EVENT(2, "chsc: scpd failed (rc=%04x)\n", | |
1da177e4 | 696 | scpd_area->response.code); |
1da177e4 LT |
697 | out: |
698 | free_page((unsigned long)scpd_area); | |
699 | return ret; | |
700 | } | |
9d92a7e1 CH |
701 | EXPORT_SYMBOL_GPL(chsc_determine_channel_path_desc); |
702 | ||
703 | int chsc_determine_base_channel_path_desc(struct chp_id chpid, | |
704 | struct channel_path_desc *desc) | |
705 | { | |
706 | struct chsc_response_struct *chsc_resp; | |
707 | int ret; | |
708 | ||
709 | chsc_resp = kzalloc(sizeof(*chsc_resp), GFP_KERNEL); | |
710 | if (!chsc_resp) | |
711 | return -ENOMEM; | |
712 | ret = chsc_determine_channel_path_desc(chpid, 0, 0, 0, 0, chsc_resp); | |
713 | if (ret) | |
714 | goto out_free; | |
715 | memcpy(desc, &chsc_resp->data, chsc_resp->length); | |
716 | out_free: | |
717 | kfree(chsc_resp); | |
718 | return ret; | |
719 | } | |
1da177e4 | 720 | |
495a5b45 CH |
721 | static void |
722 | chsc_initialize_cmg_chars(struct channel_path *chp, u8 cmcv, | |
723 | struct cmg_chars *chars) | |
724 | { | |
725 | switch (chp->cmg) { | |
726 | case 2: | |
727 | case 3: | |
728 | chp->cmg_chars = kmalloc(sizeof(struct cmg_chars), | |
729 | GFP_KERNEL); | |
730 | if (chp->cmg_chars) { | |
731 | int i, mask; | |
732 | struct cmg_chars *cmg_chars; | |
733 | ||
734 | cmg_chars = chp->cmg_chars; | |
735 | for (i = 0; i < NR_MEASUREMENT_CHARS; i++) { | |
736 | mask = 0x80 >> (i + 3); | |
737 | if (cmcv & mask) | |
738 | cmg_chars->values[i] = chars->values[i]; | |
739 | else | |
740 | cmg_chars->values[i] = 0; | |
741 | } | |
742 | } | |
743 | break; | |
744 | default: | |
745 | /* No cmg-dependent data. */ | |
746 | break; | |
747 | } | |
748 | } | |
749 | ||
e6b6e10a | 750 | int chsc_get_channel_measurement_chars(struct channel_path *chp) |
495a5b45 CH |
751 | { |
752 | int ccode, ret; | |
753 | ||
754 | struct { | |
755 | struct chsc_header request; | |
756 | u32 : 24; | |
757 | u32 first_chpid : 8; | |
758 | u32 : 24; | |
759 | u32 last_chpid : 8; | |
760 | u32 zeroes1; | |
761 | struct chsc_header response; | |
762 | u32 zeroes2; | |
763 | u32 not_valid : 1; | |
764 | u32 shared : 1; | |
765 | u32 : 22; | |
766 | u32 chpid : 8; | |
767 | u32 cmcv : 5; | |
768 | u32 : 11; | |
769 | u32 cmgq : 8; | |
770 | u32 cmg : 8; | |
771 | u32 zeroes3; | |
772 | u32 data[NR_MEASUREMENT_CHARS]; | |
0f008aa3 | 773 | } __attribute__ ((packed)) *scmc_area; |
495a5b45 CH |
774 | |
775 | scmc_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
776 | if (!scmc_area) | |
777 | return -ENOMEM; | |
778 | ||
779 | scmc_area->request.length = 0x0010; | |
780 | scmc_area->request.code = 0x0022; | |
781 | ||
f86635fa PO |
782 | scmc_area->first_chpid = chp->chpid.id; |
783 | scmc_area->last_chpid = chp->chpid.id; | |
495a5b45 CH |
784 | |
785 | ccode = chsc(scmc_area); | |
786 | if (ccode > 0) { | |
787 | ret = (ccode == 3) ? -ENODEV : -EBUSY; | |
788 | goto out; | |
789 | } | |
790 | ||
b9c9a21a CH |
791 | ret = chsc_error_from_response(scmc_area->response.code); |
792 | if (ret == 0) { | |
793 | /* Success. */ | |
495a5b45 CH |
794 | if (!scmc_area->not_valid) { |
795 | chp->cmg = scmc_area->cmg; | |
796 | chp->shared = scmc_area->shared; | |
797 | chsc_initialize_cmg_chars(chp, scmc_area->cmcv, | |
798 | (struct cmg_chars *) | |
799 | &scmc_area->data); | |
800 | } else { | |
801 | chp->cmg = -1; | |
802 | chp->shared = -1; | |
803 | } | |
b9c9a21a CH |
804 | } else { |
805 | CIO_CRW_EVENT(2, "chsc: scmc failed (rc=%04x)\n", | |
495a5b45 | 806 | scmc_area->response.code); |
495a5b45 CH |
807 | } |
808 | out: | |
809 | free_page((unsigned long)scmc_area); | |
810 | return ret; | |
811 | } | |
812 | ||
4434a38c | 813 | int __init chsc_alloc_sei_area(void) |
1da177e4 | 814 | { |
c1156189 CH |
815 | int ret; |
816 | ||
1da177e4 | 817 | sei_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
c1156189 | 818 | if (!sei_page) { |
e556bbbd CH |
819 | CIO_MSG_EVENT(0, "Can't allocate page for processing of " |
820 | "chsc machine checks!\n"); | |
c1156189 CH |
821 | return -ENOMEM; |
822 | } | |
f5daba1d | 823 | ret = crw_register_handler(CRW_RSC_CSS, chsc_process_crw); |
c1156189 CH |
824 | if (ret) |
825 | kfree(sei_page); | |
826 | return ret; | |
1da177e4 LT |
827 | } |
828 | ||
4434a38c CH |
829 | void __init chsc_free_sei_area(void) |
830 | { | |
f5daba1d | 831 | crw_unregister_handler(CRW_RSC_CSS); |
4434a38c CH |
832 | kfree(sei_page); |
833 | } | |
834 | ||
fb6958a5 CH |
835 | int __init |
836 | chsc_enable_facility(int operation_code) | |
837 | { | |
838 | int ret; | |
839 | struct { | |
840 | struct chsc_header request; | |
841 | u8 reserved1:4; | |
842 | u8 format:4; | |
843 | u8 reserved2; | |
844 | u16 operation_code; | |
845 | u32 reserved3; | |
846 | u32 reserved4; | |
847 | u32 operation_data_area[252]; | |
848 | struct chsc_header response; | |
849 | u32 reserved5:4; | |
850 | u32 format2:4; | |
851 | u32 reserved6:24; | |
0f008aa3 | 852 | } __attribute__ ((packed)) *sda_area; |
fb6958a5 CH |
853 | |
854 | sda_area = (void *)get_zeroed_page(GFP_KERNEL|GFP_DMA); | |
855 | if (!sda_area) | |
856 | return -ENOMEM; | |
495a5b45 CH |
857 | sda_area->request.length = 0x0400; |
858 | sda_area->request.code = 0x0031; | |
fb6958a5 CH |
859 | sda_area->operation_code = operation_code; |
860 | ||
861 | ret = chsc(sda_area); | |
862 | if (ret > 0) { | |
863 | ret = (ret == 3) ? -ENODEV : -EBUSY; | |
864 | goto out; | |
865 | } | |
b9c9a21a | 866 | |
fb6958a5 | 867 | switch (sda_area->response.code) { |
b9c9a21a | 868 | case 0x0101: |
fb6958a5 CH |
869 | ret = -EOPNOTSUPP; |
870 | break; | |
b9c9a21a CH |
871 | default: |
872 | ret = chsc_error_from_response(sda_area->response.code); | |
fb6958a5 | 873 | } |
b9c9a21a CH |
874 | if (ret != 0) |
875 | CIO_CRW_EVENT(2, "chsc: sda (oc=%x) failed (rc=%04x)\n", | |
876 | operation_code, sda_area->response.code); | |
fb6958a5 CH |
877 | out: |
878 | free_page((unsigned long)sda_area); | |
879 | return ret; | |
880 | } | |
881 | ||
1da177e4 LT |
882 | struct css_general_char css_general_characteristics; |
883 | struct css_chsc_char css_chsc_characteristics; | |
884 | ||
885 | int __init | |
886 | chsc_determine_css_characteristics(void) | |
887 | { | |
888 | int result; | |
889 | struct { | |
890 | struct chsc_header request; | |
891 | u32 reserved1; | |
892 | u32 reserved2; | |
893 | u32 reserved3; | |
894 | struct chsc_header response; | |
895 | u32 reserved4; | |
896 | u32 general_char[510]; | |
897 | u32 chsc_char[518]; | |
0f008aa3 | 898 | } __attribute__ ((packed)) *scsc_area; |
1da177e4 LT |
899 | |
900 | scsc_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
b9c9a21a | 901 | if (!scsc_area) |
1da177e4 | 902 | return -ENOMEM; |
1da177e4 | 903 | |
495a5b45 CH |
904 | scsc_area->request.length = 0x0010; |
905 | scsc_area->request.code = 0x0010; | |
1da177e4 LT |
906 | |
907 | result = chsc(scsc_area); | |
908 | if (result) { | |
b9c9a21a | 909 | result = (result == 3) ? -ENODEV : -EBUSY; |
1da177e4 LT |
910 | goto exit; |
911 | } | |
912 | ||
b9c9a21a CH |
913 | result = chsc_error_from_response(scsc_area->response.code); |
914 | if (result == 0) { | |
915 | memcpy(&css_general_characteristics, scsc_area->general_char, | |
916 | sizeof(css_general_characteristics)); | |
917 | memcpy(&css_chsc_characteristics, scsc_area->chsc_char, | |
918 | sizeof(css_chsc_characteristics)); | |
919 | } else | |
920 | CIO_CRW_EVENT(2, "chsc: scsc failed (rc=%04x)\n", | |
921 | scsc_area->response.code); | |
1da177e4 LT |
922 | exit: |
923 | free_page ((unsigned long) scsc_area); | |
924 | return result; | |
925 | } | |
926 | ||
927 | EXPORT_SYMBOL_GPL(css_general_characteristics); | |
928 | EXPORT_SYMBOL_GPL(css_chsc_characteristics); | |
d2fec595 MS |
929 | |
930 | int chsc_sstpc(void *page, unsigned int op, u16 ctrl) | |
931 | { | |
932 | struct { | |
933 | struct chsc_header request; | |
934 | unsigned int rsvd0; | |
935 | unsigned int op : 8; | |
936 | unsigned int rsvd1 : 8; | |
937 | unsigned int ctrl : 16; | |
938 | unsigned int rsvd2[5]; | |
939 | struct chsc_header response; | |
940 | unsigned int rsvd3[7]; | |
941 | } __attribute__ ((packed)) *rr; | |
942 | int rc; | |
943 | ||
944 | memset(page, 0, PAGE_SIZE); | |
945 | rr = page; | |
946 | rr->request.length = 0x0020; | |
947 | rr->request.code = 0x0033; | |
948 | rr->op = op; | |
949 | rr->ctrl = ctrl; | |
950 | rc = chsc(rr); | |
951 | if (rc) | |
952 | return -EIO; | |
953 | rc = (rr->response.code == 0x0001) ? 0 : -EIO; | |
954 | return rc; | |
955 | } | |
956 | ||
957 | int chsc_sstpi(void *page, void *result, size_t size) | |
958 | { | |
959 | struct { | |
960 | struct chsc_header request; | |
961 | unsigned int rsvd0[3]; | |
962 | struct chsc_header response; | |
963 | char data[size]; | |
964 | } __attribute__ ((packed)) *rr; | |
965 | int rc; | |
966 | ||
967 | memset(page, 0, PAGE_SIZE); | |
968 | rr = page; | |
969 | rr->request.length = 0x0010; | |
970 | rr->request.code = 0x0038; | |
971 | rc = chsc(rr); | |
972 | if (rc) | |
973 | return -EIO; | |
974 | memcpy(result, &rr->data, size); | |
975 | return (rr->response.code == 0x0001) ? 0 : -EIO; | |
976 | } | |
977 |