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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 | 31 | static void *sei_page; |
fd0457a6 | 32 | static DEFINE_SPINLOCK(siosl_lock); |
818c272b | 33 | static DEFINE_SPINLOCK(sda_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 | unsigned long page; |
89 | struct chsc_ssd_area *ssd_area; | |
90 | int ccode; | |
91 | int ret; | |
92 | int i; | |
93 | int mask; | |
1da177e4 | 94 | |
7ad6a249 PO |
95 | page = get_zeroed_page(GFP_KERNEL | GFP_DMA); |
96 | if (!page) | |
97 | return -ENOMEM; | |
98 | ssd_area = (struct chsc_ssd_area *) page; | |
495a5b45 CH |
99 | ssd_area->request.length = 0x0010; |
100 | ssd_area->request.code = 0x0004; | |
7ad6a249 PO |
101 | ssd_area->ssid = schid.ssid; |
102 | ssd_area->f_sch = schid.sch_no; | |
103 | ssd_area->l_sch = schid.sch_no; | |
1da177e4 LT |
104 | |
105 | ccode = chsc(ssd_area); | |
7ad6a249 | 106 | /* Check response. */ |
1da177e4 | 107 | if (ccode > 0) { |
7ad6a249 PO |
108 | ret = (ccode == 3) ? -ENODEV : -EBUSY; |
109 | goto out_free; | |
1da177e4 | 110 | } |
b9c9a21a CH |
111 | ret = chsc_error_from_response(ssd_area->response.code); |
112 | if (ret != 0) { | |
7ad6a249 PO |
113 | CIO_MSG_EVENT(2, "chsc: ssd failed for 0.%x.%04x (rc=%04x)\n", |
114 | schid.ssid, schid.sch_no, | |
1da177e4 | 115 | ssd_area->response.code); |
7ad6a249 | 116 | goto out_free; |
1da177e4 | 117 | } |
7ad6a249 PO |
118 | if (!ssd_area->sch_valid) { |
119 | ret = -ENODEV; | |
120 | goto out_free; | |
1da177e4 | 121 | } |
7ad6a249 PO |
122 | /* Copy data */ |
123 | ret = 0; | |
124 | memset(ssd, 0, sizeof(struct chsc_ssd_info)); | |
b279a4f5 CH |
125 | if ((ssd_area->st != SUBCHANNEL_TYPE_IO) && |
126 | (ssd_area->st != SUBCHANNEL_TYPE_MSG)) | |
7ad6a249 PO |
127 | goto out_free; |
128 | ssd->path_mask = ssd_area->path_mask; | |
129 | ssd->fla_valid_mask = ssd_area->fla_valid_mask; | |
130 | for (i = 0; i < 8; i++) { | |
131 | mask = 0x80 >> i; | |
132 | if (ssd_area->path_mask & mask) { | |
133 | chp_id_init(&ssd->chpid[i]); | |
134 | ssd->chpid[i].id = ssd_area->chpid[i]; | |
1da177e4 | 135 | } |
7ad6a249 PO |
136 | if (ssd_area->fla_valid_mask & mask) |
137 | ssd->fla[i] = ssd_area->fla[i]; | |
1da177e4 | 138 | } |
7ad6a249 PO |
139 | out_free: |
140 | free_page(page); | |
1da177e4 LT |
141 | return ret; |
142 | } | |
143 | ||
e82a1567 | 144 | static int s390_subchannel_remove_chpid(struct subchannel *sch, void *data) |
1da177e4 | 145 | { |
2ec22984 | 146 | spin_lock_irq(sch->lock); |
c820de39 CH |
147 | if (sch->driver && sch->driver->chp_event) |
148 | if (sch->driver->chp_event(sch, data, CHP_OFFLINE) != 0) | |
1da177e4 | 149 | goto out_unreg; |
2ec22984 | 150 | spin_unlock_irq(sch->lock); |
1da177e4 | 151 | return 0; |
387b734f | 152 | |
1da177e4 | 153 | out_unreg: |
1da177e4 | 154 | sch->lpm = 0; |
387b734f | 155 | spin_unlock_irq(sch->lock); |
83b3370c | 156 | css_schedule_eval(sch->schid); |
1da177e4 LT |
157 | return 0; |
158 | } | |
159 | ||
e6b6e10a | 160 | void chsc_chp_offline(struct chp_id chpid) |
1da177e4 LT |
161 | { |
162 | char dbf_txt[15]; | |
99611f87 | 163 | struct chp_link link; |
1da177e4 | 164 | |
f86635fa | 165 | sprintf(dbf_txt, "chpr%x.%02x", chpid.cssid, chpid.id); |
1da177e4 LT |
166 | CIO_TRACE_EVENT(2, dbf_txt); |
167 | ||
e6b6e10a | 168 | if (chp_get_status(chpid) <= 0) |
1da177e4 | 169 | return; |
99611f87 CH |
170 | memset(&link, 0, sizeof(struct chp_link)); |
171 | link.chpid = chpid; | |
22806dc1 CH |
172 | /* Wait until previous actions have settled. */ |
173 | css_wait_for_slow_path(); | |
99611f87 | 174 | for_each_subchannel_staged(s390_subchannel_remove_chpid, NULL, &link); |
1da177e4 LT |
175 | } |
176 | ||
e82a1567 | 177 | static int s390_process_res_acc_new_sch(struct subchannel_id schid, void *data) |
f97a56fb CH |
178 | { |
179 | struct schib schib; | |
f97a56fb CH |
180 | /* |
181 | * We don't know the device yet, but since a path | |
182 | * may be available now to the device we'll have | |
183 | * to do recognition again. | |
184 | * Since we don't have any idea about which chpid | |
185 | * that beast may be on we'll have to do a stsch | |
186 | * on all devices, grr... | |
187 | */ | |
fb6958a5 | 188 | if (stsch_err(schid, &schib)) |
f97a56fb | 189 | /* We're through */ |
83b3370c | 190 | return -ENXIO; |
f97a56fb CH |
191 | |
192 | /* Put it on the slow path. */ | |
83b3370c | 193 | css_schedule_eval(schid); |
f97a56fb CH |
194 | return 0; |
195 | } | |
196 | ||
e82a1567 | 197 | static int __s390_process_res_acc(struct subchannel *sch, void *data) |
1da177e4 | 198 | { |
2ec22984 | 199 | spin_lock_irq(sch->lock); |
c820de39 CH |
200 | if (sch->driver && sch->driver->chp_event) |
201 | sch->driver->chp_event(sch, data, CHP_ONLINE); | |
2ec22984 | 202 | spin_unlock_irq(sch->lock); |
e82a1567 | 203 | |
dd9963f9 | 204 | return 0; |
f97a56fb CH |
205 | } |
206 | ||
99611f87 | 207 | static void s390_process_res_acc(struct chp_link *link) |
f97a56fb | 208 | { |
1da177e4 LT |
209 | char dbf_txt[15]; |
210 | ||
99611f87 CH |
211 | sprintf(dbf_txt, "accpr%x.%02x", link->chpid.cssid, |
212 | link->chpid.id); | |
1da177e4 | 213 | CIO_TRACE_EVENT( 2, dbf_txt); |
99611f87 CH |
214 | if (link->fla != 0) { |
215 | sprintf(dbf_txt, "fla%x", link->fla); | |
1da177e4 LT |
216 | CIO_TRACE_EVENT( 2, dbf_txt); |
217 | } | |
22806dc1 CH |
218 | /* Wait until previous actions have settled. */ |
219 | css_wait_for_slow_path(); | |
1da177e4 LT |
220 | /* |
221 | * I/O resources may have become accessible. | |
222 | * Scan through all subchannels that may be concerned and | |
223 | * do a validation on those. | |
224 | * The more information we have (info), the less scanning | |
225 | * will we have to do. | |
226 | */ | |
e82a1567 | 227 | for_each_subchannel_staged(__s390_process_res_acc, |
99611f87 | 228 | s390_process_res_acc_new_sch, link); |
1da177e4 LT |
229 | } |
230 | ||
231 | static int | |
232 | __get_chpid_from_lir(void *data) | |
233 | { | |
234 | struct lir { | |
235 | u8 iq; | |
236 | u8 ic; | |
237 | u16 sci; | |
238 | /* incident-node descriptor */ | |
239 | u32 indesc[28]; | |
240 | /* attached-node descriptor */ | |
241 | u32 andesc[28]; | |
242 | /* incident-specific information */ | |
243 | u32 isinfo[28]; | |
0f008aa3 | 244 | } __attribute__ ((packed)) *lir; |
1da177e4 | 245 | |
12975aef | 246 | lir = data; |
1da177e4 LT |
247 | if (!(lir->iq&0x80)) |
248 | /* NULL link incident record */ | |
249 | return -EINVAL; | |
250 | if (!(lir->indesc[0]&0xc0000000)) | |
251 | /* node descriptor not valid */ | |
252 | return -EINVAL; | |
253 | if (!(lir->indesc[0]&0x10000000)) | |
254 | /* don't handle device-type nodes - FIXME */ | |
255 | return -EINVAL; | |
256 | /* Byte 3 contains the chpid. Could also be CTCA, but we don't care */ | |
257 | ||
258 | return (u16) (lir->indesc[0]&0x000000ff); | |
259 | } | |
260 | ||
184357a5 PO |
261 | struct chsc_sei_area { |
262 | struct chsc_header request; | |
263 | u32 reserved1; | |
264 | u32 reserved2; | |
265 | u32 reserved3; | |
266 | struct chsc_header response; | |
267 | u32 reserved4; | |
268 | u8 flags; | |
269 | u8 vf; /* validity flags */ | |
270 | u8 rs; /* reporting source */ | |
271 | u8 cc; /* content code */ | |
272 | u16 fla; /* full link address */ | |
273 | u16 rsid; /* reporting source id */ | |
274 | u32 reserved5; | |
275 | u32 reserved6; | |
276 | u8 ccdf[4096 - 16 - 24]; /* content-code dependent field */ | |
277 | /* ccdf has to be big enough for a link-incident record */ | |
278 | } __attribute__ ((packed)); | |
279 | ||
83b3370c | 280 | static void chsc_process_sei_link_incident(struct chsc_sei_area *sei_area) |
184357a5 | 281 | { |
f86635fa PO |
282 | struct chp_id chpid; |
283 | int id; | |
184357a5 PO |
284 | |
285 | CIO_CRW_EVENT(4, "chsc: link incident (rs=%02x, rs_id=%04x)\n", | |
286 | sei_area->rs, sei_area->rsid); | |
287 | if (sei_area->rs != 4) | |
83b3370c | 288 | return; |
f86635fa PO |
289 | id = __get_chpid_from_lir(sei_area->ccdf); |
290 | if (id < 0) | |
184357a5 | 291 | CIO_CRW_EVENT(4, "chsc: link incident - invalid LIR\n"); |
f86635fa PO |
292 | else { |
293 | chp_id_init(&chpid); | |
294 | chpid.id = id; | |
e6b6e10a | 295 | chsc_chp_offline(chpid); |
f86635fa | 296 | } |
184357a5 PO |
297 | } |
298 | ||
83b3370c | 299 | static void chsc_process_sei_res_acc(struct chsc_sei_area *sei_area) |
1da177e4 | 300 | { |
99611f87 | 301 | struct chp_link link; |
f86635fa | 302 | struct chp_id chpid; |
184357a5 | 303 | int status; |
184357a5 PO |
304 | |
305 | CIO_CRW_EVENT(4, "chsc: resource accessibility event (rs=%02x, " | |
306 | "rs_id=%04x)\n", sei_area->rs, sei_area->rsid); | |
307 | if (sei_area->rs != 4) | |
83b3370c | 308 | return; |
f86635fa PO |
309 | chp_id_init(&chpid); |
310 | chpid.id = sei_area->rsid; | |
184357a5 | 311 | /* allocate a new channel path structure, if needed */ |
e6b6e10a | 312 | status = chp_get_status(chpid); |
184357a5 | 313 | if (status < 0) |
e6b6e10a | 314 | chp_new(chpid); |
184357a5 | 315 | else if (!status) |
83b3370c | 316 | return; |
99611f87 CH |
317 | memset(&link, 0, sizeof(struct chp_link)); |
318 | link.chpid = chpid; | |
184357a5 | 319 | if ((sei_area->vf & 0xc0) != 0) { |
99611f87 | 320 | link.fla = sei_area->fla; |
184357a5 PO |
321 | if ((sei_area->vf & 0xc0) == 0xc0) |
322 | /* full link address */ | |
99611f87 | 323 | link.fla_mask = 0xffff; |
184357a5 PO |
324 | else |
325 | /* link address */ | |
99611f87 | 326 | link.fla_mask = 0xff00; |
184357a5 | 327 | } |
99611f87 | 328 | s390_process_res_acc(&link); |
184357a5 PO |
329 | } |
330 | ||
e5854a58 PO |
331 | struct chp_config_data { |
332 | u8 map[32]; | |
333 | u8 op; | |
334 | u8 pc; | |
335 | }; | |
336 | ||
83b3370c | 337 | static void chsc_process_sei_chp_config(struct chsc_sei_area *sei_area) |
e5854a58 PO |
338 | { |
339 | struct chp_config_data *data; | |
340 | struct chp_id chpid; | |
341 | int num; | |
e6d5a428 | 342 | char *events[3] = {"configure", "deconfigure", "cancel deconfigure"}; |
e5854a58 PO |
343 | |
344 | CIO_CRW_EVENT(4, "chsc: channel-path-configuration notification\n"); | |
345 | if (sei_area->rs != 0) | |
83b3370c | 346 | return; |
e5854a58 PO |
347 | data = (struct chp_config_data *) &(sei_area->ccdf); |
348 | chp_id_init(&chpid); | |
349 | for (num = 0; num <= __MAX_CHPID; num++) { | |
350 | if (!chp_test_bit(data->map, num)) | |
351 | continue; | |
352 | chpid.id = num; | |
e6d5a428 ME |
353 | pr_notice("Processing %s for channel path %x.%02x\n", |
354 | events[data->op], chpid.cssid, chpid.id); | |
e5854a58 PO |
355 | switch (data->op) { |
356 | case 0: | |
357 | chp_cfg_schedule(chpid, 1); | |
358 | break; | |
359 | case 1: | |
360 | chp_cfg_schedule(chpid, 0); | |
361 | break; | |
362 | case 2: | |
363 | chp_cfg_cancel_deconfigure(chpid); | |
364 | break; | |
365 | } | |
366 | } | |
e5854a58 PO |
367 | } |
368 | ||
83b3370c | 369 | static void chsc_process_sei(struct chsc_sei_area *sei_area) |
184357a5 | 370 | { |
184357a5 | 371 | /* Check if we might have lost some information. */ |
83b3370c | 372 | if (sei_area->flags & 0x40) { |
184357a5 | 373 | CIO_CRW_EVENT(2, "chsc: event overflow\n"); |
83b3370c PO |
374 | css_schedule_eval_all(); |
375 | } | |
184357a5 | 376 | /* which kind of information was stored? */ |
184357a5 PO |
377 | switch (sei_area->cc) { |
378 | case 1: /* link incident*/ | |
83b3370c | 379 | chsc_process_sei_link_incident(sei_area); |
184357a5 PO |
380 | break; |
381 | case 2: /* i/o resource accessibiliy */ | |
83b3370c | 382 | chsc_process_sei_res_acc(sei_area); |
184357a5 | 383 | break; |
e5854a58 | 384 | case 8: /* channel-path-configuration notification */ |
83b3370c | 385 | chsc_process_sei_chp_config(sei_area); |
e5854a58 | 386 | break; |
184357a5 PO |
387 | default: /* other stuff */ |
388 | CIO_CRW_EVENT(4, "chsc: unhandled sei content code %d\n", | |
389 | sei_area->cc); | |
390 | break; | |
391 | } | |
184357a5 PO |
392 | } |
393 | ||
c1156189 | 394 | static void chsc_process_crw(struct crw *crw0, struct crw *crw1, int overflow) |
184357a5 PO |
395 | { |
396 | struct chsc_sei_area *sei_area; | |
1da177e4 | 397 | |
c1156189 CH |
398 | if (overflow) { |
399 | css_schedule_eval_all(); | |
400 | return; | |
401 | } | |
402 | CIO_CRW_EVENT(2, "CRW reports slct=%d, oflw=%d, " | |
403 | "chn=%d, rsc=%X, anc=%d, erc=%X, rsid=%X\n", | |
404 | crw0->slct, crw0->oflw, crw0->chn, crw0->rsc, crw0->anc, | |
405 | crw0->erc, crw0->rsid); | |
1da177e4 | 406 | if (!sei_page) |
83b3370c | 407 | return; |
184357a5 PO |
408 | /* Access to sei_page is serialized through machine check handler |
409 | * thread, so no need for locking. */ | |
1da177e4 LT |
410 | sei_area = sei_page; |
411 | ||
c1156189 | 412 | CIO_TRACE_EVENT(2, "prcss"); |
1da177e4 | 413 | do { |
1da177e4 | 414 | memset(sei_area, 0, sizeof(*sei_area)); |
495a5b45 CH |
415 | sei_area->request.length = 0x0010; |
416 | sei_area->request.code = 0x000e; | |
184357a5 PO |
417 | if (chsc(sei_area)) |
418 | break; | |
1da177e4 | 419 | |
184357a5 PO |
420 | if (sei_area->response.code == 0x0001) { |
421 | CIO_CRW_EVENT(4, "chsc: sei successful\n"); | |
83b3370c | 422 | chsc_process_sei(sei_area); |
184357a5 PO |
423 | } else { |
424 | CIO_CRW_EVENT(2, "chsc: sei failed (rc=%04x)\n", | |
1da177e4 | 425 | sei_area->response.code); |
1da177e4 LT |
426 | break; |
427 | } | |
428 | } while (sei_area->flags & 0x80); | |
1da177e4 LT |
429 | } |
430 | ||
83b3370c | 431 | void chsc_chp_online(struct chp_id chpid) |
f97a56fb | 432 | { |
1da177e4 | 433 | char dbf_txt[15]; |
99611f87 | 434 | struct chp_link link; |
1da177e4 | 435 | |
f86635fa | 436 | sprintf(dbf_txt, "cadd%x.%02x", chpid.cssid, chpid.id); |
1da177e4 LT |
437 | CIO_TRACE_EVENT(2, dbf_txt); |
438 | ||
22806dc1 | 439 | if (chp_get_status(chpid) != 0) { |
99611f87 CH |
440 | memset(&link, 0, sizeof(struct chp_link)); |
441 | link.chpid = chpid; | |
22806dc1 CH |
442 | /* Wait until previous actions have settled. */ |
443 | css_wait_for_slow_path(); | |
c820de39 | 444 | for_each_subchannel_staged(__s390_process_res_acc, NULL, |
99611f87 | 445 | &link); |
22806dc1 | 446 | } |
1da177e4 LT |
447 | } |
448 | ||
f86635fa PO |
449 | static void __s390_subchannel_vary_chpid(struct subchannel *sch, |
450 | struct chp_id chpid, int on) | |
1da177e4 | 451 | { |
1da177e4 | 452 | unsigned long flags; |
99611f87 | 453 | struct chp_link link; |
1da177e4 | 454 | |
99611f87 CH |
455 | memset(&link, 0, sizeof(struct chp_link)); |
456 | link.chpid = chpid; | |
2ec22984 | 457 | spin_lock_irqsave(sch->lock, flags); |
c820de39 | 458 | if (sch->driver && sch->driver->chp_event) |
99611f87 | 459 | sch->driver->chp_event(sch, &link, |
c820de39 | 460 | on ? CHP_VARY_ON : CHP_VARY_OFF); |
2ec22984 | 461 | spin_unlock_irqrestore(sch->lock, flags); |
1da177e4 LT |
462 | } |
463 | ||
e82a1567 | 464 | static int s390_subchannel_vary_chpid_off(struct subchannel *sch, void *data) |
1da177e4 | 465 | { |
e82a1567 | 466 | struct chp_id *chpid = data; |
1da177e4 LT |
467 | |
468 | __s390_subchannel_vary_chpid(sch, *chpid, 0); | |
469 | return 0; | |
470 | } | |
471 | ||
e82a1567 | 472 | static int s390_subchannel_vary_chpid_on(struct subchannel *sch, void *data) |
1da177e4 | 473 | { |
e82a1567 | 474 | struct chp_id *chpid = data; |
1da177e4 LT |
475 | |
476 | __s390_subchannel_vary_chpid(sch, *chpid, 1); | |
477 | return 0; | |
478 | } | |
479 | ||
f97a56fb CH |
480 | static int |
481 | __s390_vary_chpid_on(struct subchannel_id schid, void *data) | |
482 | { | |
483 | struct schib schib; | |
f97a56fb | 484 | |
fb6958a5 | 485 | if (stsch_err(schid, &schib)) |
f97a56fb CH |
486 | /* We're through */ |
487 | return -ENXIO; | |
488 | /* Put it on the slow path. */ | |
83b3370c | 489 | css_schedule_eval(schid); |
f97a56fb CH |
490 | return 0; |
491 | } | |
492 | ||
e6b6e10a PO |
493 | /** |
494 | * chsc_chp_vary - propagate channel-path vary operation to subchannels | |
495 | * @chpid: channl-path ID | |
496 | * @on: non-zero for vary online, zero for vary offline | |
1da177e4 | 497 | */ |
e6b6e10a | 498 | int chsc_chp_vary(struct chp_id chpid, int on) |
1da177e4 | 499 | { |
99611f87 CH |
500 | struct chp_link link; |
501 | ||
502 | memset(&link, 0, sizeof(struct chp_link)); | |
503 | link.chpid = chpid; | |
22806dc1 CH |
504 | /* Wait until previous actions have settled. */ |
505 | css_wait_for_slow_path(); | |
1da177e4 LT |
506 | /* |
507 | * Redo PathVerification on the devices the chpid connects to | |
508 | */ | |
509 | ||
f97a56fb | 510 | if (on) |
e82a1567 | 511 | for_each_subchannel_staged(s390_subchannel_vary_chpid_on, |
99611f87 | 512 | __s390_vary_chpid_on, &link); |
e82a1567 PO |
513 | else |
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 | ||
dcbd16d5 | 555 | int __chsc_do_secm(struct channel_subsystem *css, int enable, void *page) |
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 | ||
576 | secm_area = page; | |
577 | secm_area->request.length = 0x0050; | |
578 | secm_area->request.code = 0x0016; | |
579 | ||
d1bf8590 | 580 | secm_area->key = PAGE_DEFAULT_KEY >> 4; |
495a5b45 CH |
581 | secm_area->cub_addr1 = (u64)(unsigned long)css->cub_addr1; |
582 | secm_area->cub_addr2 = (u64)(unsigned long)css->cub_addr2; | |
583 | ||
584 | secm_area->operation_code = enable ? 0 : 1; | |
585 | ||
586 | ccode = chsc(secm_area); | |
587 | if (ccode > 0) | |
588 | return (ccode == 3) ? -ENODEV : -EBUSY; | |
589 | ||
590 | switch (secm_area->response.code) { | |
b9c9a21a CH |
591 | case 0x0102: |
592 | case 0x0103: | |
495a5b45 | 593 | ret = -EINVAL; |
17e7d87d | 594 | break; |
495a5b45 | 595 | default: |
b9c9a21a | 596 | ret = chsc_error_from_response(secm_area->response.code); |
495a5b45 | 597 | } |
b9c9a21a CH |
598 | if (ret != 0) |
599 | CIO_CRW_EVENT(2, "chsc: secm failed (rc=%04x)\n", | |
600 | secm_area->response.code); | |
495a5b45 CH |
601 | return ret; |
602 | } | |
603 | ||
604 | int | |
605 | chsc_secm(struct channel_subsystem *css, int enable) | |
606 | { | |
607 | void *secm_area; | |
608 | int ret; | |
609 | ||
610 | secm_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
611 | if (!secm_area) | |
612 | return -ENOMEM; | |
613 | ||
495a5b45 CH |
614 | if (enable && !css->cm_enabled) { |
615 | css->cub_addr1 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
616 | css->cub_addr2 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
617 | if (!css->cub_addr1 || !css->cub_addr2) { | |
618 | free_page((unsigned long)css->cub_addr1); | |
619 | free_page((unsigned long)css->cub_addr2); | |
620 | free_page((unsigned long)secm_area); | |
495a5b45 CH |
621 | return -ENOMEM; |
622 | } | |
623 | } | |
624 | ret = __chsc_do_secm(css, enable, secm_area); | |
625 | if (!ret) { | |
626 | css->cm_enabled = enable; | |
627 | if (css->cm_enabled) { | |
628 | ret = chsc_add_cmg_attr(css); | |
629 | if (ret) { | |
630 | memset(secm_area, 0, PAGE_SIZE); | |
631 | __chsc_do_secm(css, 0, secm_area); | |
632 | css->cm_enabled = 0; | |
633 | } | |
634 | } else | |
635 | chsc_remove_cmg_attr(css); | |
636 | } | |
8c4941c5 | 637 | if (!css->cm_enabled) { |
495a5b45 CH |
638 | free_page((unsigned long)css->cub_addr1); |
639 | free_page((unsigned long)css->cub_addr2); | |
640 | } | |
495a5b45 CH |
641 | free_page((unsigned long)secm_area); |
642 | return ret; | |
643 | } | |
644 | ||
9d92a7e1 CH |
645 | int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt, |
646 | int c, int m, | |
647 | struct chsc_response_struct *resp) | |
1da177e4 LT |
648 | { |
649 | int ccode, ret; | |
650 | ||
651 | struct { | |
652 | struct chsc_header request; | |
9d92a7e1 CH |
653 | u32 : 2; |
654 | u32 m : 1; | |
655 | u32 c : 1; | |
656 | u32 fmt : 4; | |
657 | u32 cssid : 8; | |
658 | u32 : 4; | |
659 | u32 rfmt : 4; | |
1da177e4 LT |
660 | u32 first_chpid : 8; |
661 | u32 : 24; | |
662 | u32 last_chpid : 8; | |
663 | u32 zeroes1; | |
664 | struct chsc_header response; | |
9d92a7e1 | 665 | u8 data[PAGE_SIZE - 20]; |
0f008aa3 | 666 | } __attribute__ ((packed)) *scpd_area; |
1da177e4 | 667 | |
9d92a7e1 CH |
668 | if ((rfmt == 1) && !css_general_characteristics.fcs) |
669 | return -EINVAL; | |
670 | if ((rfmt == 2) && !css_general_characteristics.cib) | |
671 | return -EINVAL; | |
1da177e4 LT |
672 | scpd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
673 | if (!scpd_area) | |
674 | return -ENOMEM; | |
675 | ||
495a5b45 CH |
676 | scpd_area->request.length = 0x0010; |
677 | scpd_area->request.code = 0x0002; | |
1da177e4 | 678 | |
9d92a7e1 | 679 | scpd_area->cssid = chpid.cssid; |
f86635fa PO |
680 | scpd_area->first_chpid = chpid.id; |
681 | scpd_area->last_chpid = chpid.id; | |
9d92a7e1 CH |
682 | scpd_area->m = m; |
683 | scpd_area->c = c; | |
684 | scpd_area->fmt = fmt; | |
685 | scpd_area->rfmt = rfmt; | |
1da177e4 LT |
686 | |
687 | ccode = chsc(scpd_area); | |
688 | if (ccode > 0) { | |
689 | ret = (ccode == 3) ? -ENODEV : -EBUSY; | |
690 | goto out; | |
691 | } | |
692 | ||
b9c9a21a CH |
693 | ret = chsc_error_from_response(scpd_area->response.code); |
694 | if (ret == 0) | |
695 | /* Success. */ | |
9d92a7e1 | 696 | memcpy(resp, &scpd_area->response, scpd_area->response.length); |
b9c9a21a CH |
697 | else |
698 | CIO_CRW_EVENT(2, "chsc: scpd failed (rc=%04x)\n", | |
1da177e4 | 699 | scpd_area->response.code); |
1da177e4 LT |
700 | out: |
701 | free_page((unsigned long)scpd_area); | |
702 | return ret; | |
703 | } | |
9d92a7e1 CH |
704 | EXPORT_SYMBOL_GPL(chsc_determine_channel_path_desc); |
705 | ||
706 | int chsc_determine_base_channel_path_desc(struct chp_id chpid, | |
707 | struct channel_path_desc *desc) | |
708 | { | |
709 | struct chsc_response_struct *chsc_resp; | |
710 | int ret; | |
711 | ||
712 | chsc_resp = kzalloc(sizeof(*chsc_resp), GFP_KERNEL); | |
713 | if (!chsc_resp) | |
714 | return -ENOMEM; | |
715 | ret = chsc_determine_channel_path_desc(chpid, 0, 0, 0, 0, chsc_resp); | |
716 | if (ret) | |
717 | goto out_free; | |
878c4956 | 718 | memcpy(desc, &chsc_resp->data, sizeof(*desc)); |
9d92a7e1 CH |
719 | out_free: |
720 | kfree(chsc_resp); | |
721 | return ret; | |
722 | } | |
1da177e4 | 723 | |
495a5b45 CH |
724 | static void |
725 | chsc_initialize_cmg_chars(struct channel_path *chp, u8 cmcv, | |
726 | struct cmg_chars *chars) | |
727 | { | |
728 | switch (chp->cmg) { | |
729 | case 2: | |
730 | case 3: | |
731 | chp->cmg_chars = kmalloc(sizeof(struct cmg_chars), | |
732 | GFP_KERNEL); | |
733 | if (chp->cmg_chars) { | |
734 | int i, mask; | |
735 | struct cmg_chars *cmg_chars; | |
736 | ||
737 | cmg_chars = chp->cmg_chars; | |
738 | for (i = 0; i < NR_MEASUREMENT_CHARS; i++) { | |
739 | mask = 0x80 >> (i + 3); | |
740 | if (cmcv & mask) | |
741 | cmg_chars->values[i] = chars->values[i]; | |
742 | else | |
743 | cmg_chars->values[i] = 0; | |
744 | } | |
745 | } | |
746 | break; | |
747 | default: | |
748 | /* No cmg-dependent data. */ | |
749 | break; | |
750 | } | |
751 | } | |
752 | ||
e6b6e10a | 753 | int chsc_get_channel_measurement_chars(struct channel_path *chp) |
495a5b45 CH |
754 | { |
755 | int ccode, ret; | |
756 | ||
757 | struct { | |
758 | struct chsc_header request; | |
759 | u32 : 24; | |
760 | u32 first_chpid : 8; | |
761 | u32 : 24; | |
762 | u32 last_chpid : 8; | |
763 | u32 zeroes1; | |
764 | struct chsc_header response; | |
765 | u32 zeroes2; | |
766 | u32 not_valid : 1; | |
767 | u32 shared : 1; | |
768 | u32 : 22; | |
769 | u32 chpid : 8; | |
770 | u32 cmcv : 5; | |
771 | u32 : 11; | |
772 | u32 cmgq : 8; | |
773 | u32 cmg : 8; | |
774 | u32 zeroes3; | |
775 | u32 data[NR_MEASUREMENT_CHARS]; | |
0f008aa3 | 776 | } __attribute__ ((packed)) *scmc_area; |
495a5b45 CH |
777 | |
778 | scmc_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
779 | if (!scmc_area) | |
780 | return -ENOMEM; | |
781 | ||
782 | scmc_area->request.length = 0x0010; | |
783 | scmc_area->request.code = 0x0022; | |
784 | ||
f86635fa PO |
785 | scmc_area->first_chpid = chp->chpid.id; |
786 | scmc_area->last_chpid = chp->chpid.id; | |
495a5b45 CH |
787 | |
788 | ccode = chsc(scmc_area); | |
789 | if (ccode > 0) { | |
790 | ret = (ccode == 3) ? -ENODEV : -EBUSY; | |
791 | goto out; | |
792 | } | |
793 | ||
b9c9a21a CH |
794 | ret = chsc_error_from_response(scmc_area->response.code); |
795 | if (ret == 0) { | |
796 | /* Success. */ | |
495a5b45 CH |
797 | if (!scmc_area->not_valid) { |
798 | chp->cmg = scmc_area->cmg; | |
799 | chp->shared = scmc_area->shared; | |
800 | chsc_initialize_cmg_chars(chp, scmc_area->cmcv, | |
801 | (struct cmg_chars *) | |
802 | &scmc_area->data); | |
803 | } else { | |
804 | chp->cmg = -1; | |
805 | chp->shared = -1; | |
806 | } | |
b9c9a21a CH |
807 | } else { |
808 | CIO_CRW_EVENT(2, "chsc: scmc failed (rc=%04x)\n", | |
495a5b45 | 809 | scmc_area->response.code); |
495a5b45 CH |
810 | } |
811 | out: | |
812 | free_page((unsigned long)scmc_area); | |
813 | return ret; | |
814 | } | |
815 | ||
4434a38c | 816 | int __init chsc_alloc_sei_area(void) |
1da177e4 | 817 | { |
c1156189 CH |
818 | int ret; |
819 | ||
1da177e4 | 820 | sei_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
c1156189 | 821 | if (!sei_page) { |
e556bbbd CH |
822 | CIO_MSG_EVENT(0, "Can't allocate page for processing of " |
823 | "chsc machine checks!\n"); | |
c1156189 CH |
824 | return -ENOMEM; |
825 | } | |
f5daba1d | 826 | ret = crw_register_handler(CRW_RSC_CSS, chsc_process_crw); |
c1156189 CH |
827 | if (ret) |
828 | kfree(sei_page); | |
829 | return ret; | |
1da177e4 LT |
830 | } |
831 | ||
4434a38c CH |
832 | void __init chsc_free_sei_area(void) |
833 | { | |
f5daba1d | 834 | crw_unregister_handler(CRW_RSC_CSS); |
4434a38c CH |
835 | kfree(sei_page); |
836 | } | |
837 | ||
818c272b | 838 | int chsc_enable_facility(int operation_code) |
fb6958a5 CH |
839 | { |
840 | int ret; | |
818c272b | 841 | static struct { |
fb6958a5 CH |
842 | struct chsc_header request; |
843 | u8 reserved1:4; | |
844 | u8 format:4; | |
845 | u8 reserved2; | |
846 | u16 operation_code; | |
847 | u32 reserved3; | |
848 | u32 reserved4; | |
849 | u32 operation_data_area[252]; | |
850 | struct chsc_header response; | |
851 | u32 reserved5:4; | |
852 | u32 format2:4; | |
853 | u32 reserved6:24; | |
818c272b | 854 | } __attribute__ ((packed, aligned(4096))) sda_area; |
fb6958a5 | 855 | |
818c272b SO |
856 | spin_lock(&sda_lock); |
857 | memset(&sda_area, 0, sizeof(sda_area)); | |
858 | sda_area.request.length = 0x0400; | |
859 | sda_area.request.code = 0x0031; | |
860 | sda_area.operation_code = operation_code; | |
fb6958a5 | 861 | |
818c272b | 862 | ret = chsc(&sda_area); |
fb6958a5 CH |
863 | if (ret > 0) { |
864 | ret = (ret == 3) ? -ENODEV : -EBUSY; | |
865 | goto out; | |
866 | } | |
b9c9a21a | 867 | |
818c272b | 868 | switch (sda_area.response.code) { |
b9c9a21a | 869 | case 0x0101: |
fb6958a5 CH |
870 | ret = -EOPNOTSUPP; |
871 | break; | |
b9c9a21a | 872 | default: |
818c272b | 873 | ret = chsc_error_from_response(sda_area.response.code); |
fb6958a5 | 874 | } |
b9c9a21a CH |
875 | if (ret != 0) |
876 | CIO_CRW_EVENT(2, "chsc: sda (oc=%x) failed (rc=%04x)\n", | |
818c272b | 877 | operation_code, sda_area.response.code); |
fb6958a5 | 878 | out: |
818c272b | 879 | spin_unlock(&sda_lock); |
fb6958a5 CH |
880 | return ret; |
881 | } | |
882 | ||
1da177e4 LT |
883 | struct css_general_char css_general_characteristics; |
884 | struct css_chsc_char css_chsc_characteristics; | |
885 | ||
886 | int __init | |
887 | chsc_determine_css_characteristics(void) | |
888 | { | |
889 | int result; | |
890 | struct { | |
891 | struct chsc_header request; | |
892 | u32 reserved1; | |
893 | u32 reserved2; | |
894 | u32 reserved3; | |
895 | struct chsc_header response; | |
896 | u32 reserved4; | |
897 | u32 general_char[510]; | |
898 | u32 chsc_char[518]; | |
0f008aa3 | 899 | } __attribute__ ((packed)) *scsc_area; |
1da177e4 LT |
900 | |
901 | scsc_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
b9c9a21a | 902 | if (!scsc_area) |
1da177e4 | 903 | return -ENOMEM; |
1da177e4 | 904 | |
495a5b45 CH |
905 | scsc_area->request.length = 0x0010; |
906 | scsc_area->request.code = 0x0010; | |
1da177e4 LT |
907 | |
908 | result = chsc(scsc_area); | |
909 | if (result) { | |
b9c9a21a | 910 | result = (result == 3) ? -ENODEV : -EBUSY; |
1da177e4 LT |
911 | goto exit; |
912 | } | |
913 | ||
b9c9a21a CH |
914 | result = chsc_error_from_response(scsc_area->response.code); |
915 | if (result == 0) { | |
916 | memcpy(&css_general_characteristics, scsc_area->general_char, | |
917 | sizeof(css_general_characteristics)); | |
918 | memcpy(&css_chsc_characteristics, scsc_area->chsc_char, | |
919 | sizeof(css_chsc_characteristics)); | |
920 | } else | |
921 | CIO_CRW_EVENT(2, "chsc: scsc failed (rc=%04x)\n", | |
922 | scsc_area->response.code); | |
1da177e4 LT |
923 | exit: |
924 | free_page ((unsigned long) scsc_area); | |
925 | return result; | |
926 | } | |
927 | ||
928 | EXPORT_SYMBOL_GPL(css_general_characteristics); | |
929 | EXPORT_SYMBOL_GPL(css_chsc_characteristics); | |
d2fec595 MS |
930 | |
931 | int chsc_sstpc(void *page, unsigned int op, u16 ctrl) | |
932 | { | |
933 | struct { | |
934 | struct chsc_header request; | |
935 | unsigned int rsvd0; | |
936 | unsigned int op : 8; | |
937 | unsigned int rsvd1 : 8; | |
938 | unsigned int ctrl : 16; | |
939 | unsigned int rsvd2[5]; | |
940 | struct chsc_header response; | |
941 | unsigned int rsvd3[7]; | |
942 | } __attribute__ ((packed)) *rr; | |
943 | int rc; | |
944 | ||
945 | memset(page, 0, PAGE_SIZE); | |
946 | rr = page; | |
947 | rr->request.length = 0x0020; | |
948 | rr->request.code = 0x0033; | |
949 | rr->op = op; | |
950 | rr->ctrl = ctrl; | |
951 | rc = chsc(rr); | |
952 | if (rc) | |
953 | return -EIO; | |
954 | rc = (rr->response.code == 0x0001) ? 0 : -EIO; | |
955 | return rc; | |
956 | } | |
957 | ||
958 | int chsc_sstpi(void *page, void *result, size_t size) | |
959 | { | |
960 | struct { | |
961 | struct chsc_header request; | |
962 | unsigned int rsvd0[3]; | |
963 | struct chsc_header response; | |
964 | char data[size]; | |
965 | } __attribute__ ((packed)) *rr; | |
966 | int rc; | |
967 | ||
968 | memset(page, 0, PAGE_SIZE); | |
969 | rr = page; | |
970 | rr->request.length = 0x0010; | |
971 | rr->request.code = 0x0038; | |
972 | rc = chsc(rr); | |
973 | if (rc) | |
974 | return -EIO; | |
975 | memcpy(result, &rr->data, size); | |
976 | return (rr->response.code == 0x0001) ? 0 : -EIO; | |
977 | } | |
978 | ||
fd0457a6 ME |
979 | static struct { |
980 | struct chsc_header request; | |
981 | u32 word1; | |
982 | struct subchannel_id sid; | |
983 | u32 word3; | |
984 | struct chsc_header response; | |
985 | u32 word[11]; | |
986 | } __attribute__ ((packed)) siosl_area __attribute__ ((__aligned__(PAGE_SIZE))); | |
987 | ||
988 | int chsc_siosl(struct subchannel_id schid) | |
989 | { | |
990 | unsigned long flags; | |
991 | int ccode; | |
992 | int rc; | |
993 | ||
994 | spin_lock_irqsave(&siosl_lock, flags); | |
995 | memset(&siosl_area, 0, sizeof(siosl_area)); | |
996 | siosl_area.request.length = 0x0010; | |
997 | siosl_area.request.code = 0x0046; | |
998 | siosl_area.word1 = 0x80000000; | |
999 | siosl_area.sid = schid; | |
1000 | ||
1001 | ccode = chsc(&siosl_area); | |
1002 | if (ccode > 0) { | |
1003 | if (ccode == 3) | |
1004 | rc = -ENODEV; | |
1005 | else | |
1006 | rc = -EBUSY; | |
1007 | CIO_MSG_EVENT(2, "chsc: chsc failed for 0.%x.%04x (ccode=%d)\n", | |
1008 | schid.ssid, schid.sch_no, ccode); | |
1009 | goto out; | |
1010 | } | |
1011 | rc = chsc_error_from_response(siosl_area.response.code); | |
1012 | if (rc) | |
1013 | CIO_MSG_EVENT(2, "chsc: siosl failed for 0.%x.%04x (rc=%04x)\n", | |
1014 | schid.ssid, schid.sch_no, | |
1015 | siosl_area.response.code); | |
1016 | else | |
1017 | CIO_MSG_EVENT(4, "chsc: siosl succeeded for 0.%x.%04x\n", | |
1018 | schid.ssid, schid.sch_no); | |
1019 | out: | |
1020 | spin_unlock_irqrestore(&siosl_lock, flags); | |
1021 | ||
1022 | return rc; | |
1023 | } | |
1024 | EXPORT_SYMBOL_GPL(chsc_siosl); |