Commit | Line | Data |
---|---|---|
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 | ||
11 | #include <linux/module.h> | |
1da177e4 LT |
12 | #include <linux/slab.h> |
13 | #include <linux/init.h> | |
14 | #include <linux/device.h> | |
15 | ||
16 | #include <asm/cio.h> | |
e5854a58 | 17 | #include <asm/chpid.h> |
9d92a7e1 | 18 | #include <asm/chsc.h> |
1da177e4 | 19 | |
c1156189 | 20 | #include "../s390mach.h" |
1da177e4 LT |
21 | #include "css.h" |
22 | #include "cio.h" | |
23 | #include "cio_debug.h" | |
24 | #include "ioasm.h" | |
e6b6e10a | 25 | #include "chp.h" |
1da177e4 LT |
26 | #include "chsc.h" |
27 | ||
1da177e4 LT |
28 | static void *sei_page; |
29 | ||
dae39843 CH |
30 | /** |
31 | * chsc_error_from_response() - convert a chsc response to an error | |
32 | * @response: chsc response code | |
33 | * | |
34 | * Returns an appropriate Linux error code for @response. | |
35 | */ | |
36 | int chsc_error_from_response(int response) | |
b9c9a21a CH |
37 | { |
38 | switch (response) { | |
39 | case 0x0001: | |
40 | return 0; | |
41 | case 0x0002: | |
42 | case 0x0003: | |
43 | case 0x0006: | |
44 | case 0x0007: | |
45 | case 0x0008: | |
46 | case 0x000a: | |
47 | return -EINVAL; | |
48 | case 0x0004: | |
49 | return -EOPNOTSUPP; | |
50 | default: | |
51 | return -EIO; | |
52 | } | |
53 | } | |
dae39843 | 54 | EXPORT_SYMBOL_GPL(chsc_error_from_response); |
b9c9a21a | 55 | |
7ad6a249 PO |
56 | struct chsc_ssd_area { |
57 | struct chsc_header request; | |
58 | u16 :10; | |
59 | u16 ssid:2; | |
60 | u16 :4; | |
61 | u16 f_sch; /* first subchannel */ | |
62 | u16 :16; | |
63 | u16 l_sch; /* last subchannel */ | |
64 | u32 :32; | |
65 | struct chsc_header response; | |
66 | u32 :32; | |
67 | u8 sch_valid : 1; | |
68 | u8 dev_valid : 1; | |
69 | u8 st : 3; /* subchannel type */ | |
70 | u8 zeroes : 3; | |
71 | u8 unit_addr; /* unit address */ | |
72 | u16 devno; /* device number */ | |
73 | u8 path_mask; | |
74 | u8 fla_valid_mask; | |
75 | u16 sch; /* subchannel */ | |
76 | u8 chpid[8]; /* chpids 0-7 */ | |
77 | u16 fla[8]; /* full link addresses 0-7 */ | |
78 | } __attribute__ ((packed)); | |
79 | ||
80 | int chsc_get_ssd_info(struct subchannel_id schid, struct chsc_ssd_info *ssd) | |
1da177e4 | 81 | { |
7ad6a249 PO |
82 | unsigned long page; |
83 | struct chsc_ssd_area *ssd_area; | |
84 | int ccode; | |
85 | int ret; | |
86 | int i; | |
87 | int mask; | |
1da177e4 | 88 | |
7ad6a249 PO |
89 | page = get_zeroed_page(GFP_KERNEL | GFP_DMA); |
90 | if (!page) | |
91 | return -ENOMEM; | |
92 | ssd_area = (struct chsc_ssd_area *) page; | |
495a5b45 CH |
93 | ssd_area->request.length = 0x0010; |
94 | ssd_area->request.code = 0x0004; | |
7ad6a249 PO |
95 | ssd_area->ssid = schid.ssid; |
96 | ssd_area->f_sch = schid.sch_no; | |
97 | ssd_area->l_sch = schid.sch_no; | |
1da177e4 LT |
98 | |
99 | ccode = chsc(ssd_area); | |
7ad6a249 | 100 | /* Check response. */ |
1da177e4 | 101 | if (ccode > 0) { |
7ad6a249 PO |
102 | ret = (ccode == 3) ? -ENODEV : -EBUSY; |
103 | goto out_free; | |
1da177e4 | 104 | } |
b9c9a21a CH |
105 | ret = chsc_error_from_response(ssd_area->response.code); |
106 | if (ret != 0) { | |
7ad6a249 PO |
107 | CIO_MSG_EVENT(2, "chsc: ssd failed for 0.%x.%04x (rc=%04x)\n", |
108 | schid.ssid, schid.sch_no, | |
1da177e4 | 109 | ssd_area->response.code); |
7ad6a249 | 110 | goto out_free; |
1da177e4 | 111 | } |
7ad6a249 PO |
112 | if (!ssd_area->sch_valid) { |
113 | ret = -ENODEV; | |
114 | goto out_free; | |
1da177e4 | 115 | } |
7ad6a249 PO |
116 | /* Copy data */ |
117 | ret = 0; | |
118 | memset(ssd, 0, sizeof(struct chsc_ssd_info)); | |
b279a4f5 CH |
119 | if ((ssd_area->st != SUBCHANNEL_TYPE_IO) && |
120 | (ssd_area->st != SUBCHANNEL_TYPE_MSG)) | |
7ad6a249 PO |
121 | goto out_free; |
122 | ssd->path_mask = ssd_area->path_mask; | |
123 | ssd->fla_valid_mask = ssd_area->fla_valid_mask; | |
124 | for (i = 0; i < 8; i++) { | |
125 | mask = 0x80 >> i; | |
126 | if (ssd_area->path_mask & mask) { | |
127 | chp_id_init(&ssd->chpid[i]); | |
128 | ssd->chpid[i].id = ssd_area->chpid[i]; | |
1da177e4 | 129 | } |
7ad6a249 PO |
130 | if (ssd_area->fla_valid_mask & mask) |
131 | ssd->fla[i] = ssd_area->fla[i]; | |
1da177e4 | 132 | } |
7ad6a249 PO |
133 | out_free: |
134 | free_page(page); | |
1da177e4 LT |
135 | return ret; |
136 | } | |
137 | ||
e82a1567 | 138 | static int s390_subchannel_remove_chpid(struct subchannel *sch, void *data) |
1da177e4 | 139 | { |
2ec22984 | 140 | spin_lock_irq(sch->lock); |
c820de39 CH |
141 | if (sch->driver && sch->driver->chp_event) |
142 | if (sch->driver->chp_event(sch, data, CHP_OFFLINE) != 0) | |
1da177e4 | 143 | goto out_unreg; |
2ec22984 | 144 | spin_unlock_irq(sch->lock); |
1da177e4 | 145 | return 0; |
387b734f | 146 | |
1da177e4 | 147 | out_unreg: |
1da177e4 | 148 | sch->lpm = 0; |
387b734f | 149 | spin_unlock_irq(sch->lock); |
83b3370c | 150 | css_schedule_eval(sch->schid); |
1da177e4 LT |
151 | return 0; |
152 | } | |
153 | ||
e6b6e10a | 154 | void chsc_chp_offline(struct chp_id chpid) |
1da177e4 LT |
155 | { |
156 | char dbf_txt[15]; | |
99611f87 | 157 | struct chp_link link; |
1da177e4 | 158 | |
f86635fa | 159 | sprintf(dbf_txt, "chpr%x.%02x", chpid.cssid, chpid.id); |
1da177e4 LT |
160 | CIO_TRACE_EVENT(2, dbf_txt); |
161 | ||
e6b6e10a | 162 | if (chp_get_status(chpid) <= 0) |
1da177e4 | 163 | return; |
99611f87 CH |
164 | memset(&link, 0, sizeof(struct chp_link)); |
165 | link.chpid = chpid; | |
22806dc1 CH |
166 | /* Wait until previous actions have settled. */ |
167 | css_wait_for_slow_path(); | |
99611f87 | 168 | for_each_subchannel_staged(s390_subchannel_remove_chpid, NULL, &link); |
1da177e4 LT |
169 | } |
170 | ||
e82a1567 | 171 | static int s390_process_res_acc_new_sch(struct subchannel_id schid, void *data) |
f97a56fb CH |
172 | { |
173 | struct schib schib; | |
f97a56fb CH |
174 | /* |
175 | * We don't know the device yet, but since a path | |
176 | * may be available now to the device we'll have | |
177 | * to do recognition again. | |
178 | * Since we don't have any idea about which chpid | |
179 | * that beast may be on we'll have to do a stsch | |
180 | * on all devices, grr... | |
181 | */ | |
fb6958a5 | 182 | if (stsch_err(schid, &schib)) |
f97a56fb | 183 | /* We're through */ |
83b3370c | 184 | return -ENXIO; |
f97a56fb CH |
185 | |
186 | /* Put it on the slow path. */ | |
83b3370c | 187 | css_schedule_eval(schid); |
f97a56fb CH |
188 | return 0; |
189 | } | |
190 | ||
e82a1567 | 191 | static int __s390_process_res_acc(struct subchannel *sch, void *data) |
1da177e4 | 192 | { |
2ec22984 | 193 | spin_lock_irq(sch->lock); |
c820de39 CH |
194 | if (sch->driver && sch->driver->chp_event) |
195 | sch->driver->chp_event(sch, data, CHP_ONLINE); | |
2ec22984 | 196 | spin_unlock_irq(sch->lock); |
e82a1567 | 197 | |
dd9963f9 | 198 | return 0; |
f97a56fb CH |
199 | } |
200 | ||
99611f87 | 201 | static void s390_process_res_acc(struct chp_link *link) |
f97a56fb | 202 | { |
1da177e4 LT |
203 | char dbf_txt[15]; |
204 | ||
99611f87 CH |
205 | sprintf(dbf_txt, "accpr%x.%02x", link->chpid.cssid, |
206 | link->chpid.id); | |
1da177e4 | 207 | CIO_TRACE_EVENT( 2, dbf_txt); |
99611f87 CH |
208 | if (link->fla != 0) { |
209 | sprintf(dbf_txt, "fla%x", link->fla); | |
1da177e4 LT |
210 | CIO_TRACE_EVENT( 2, dbf_txt); |
211 | } | |
22806dc1 CH |
212 | /* Wait until previous actions have settled. */ |
213 | css_wait_for_slow_path(); | |
1da177e4 LT |
214 | /* |
215 | * I/O resources may have become accessible. | |
216 | * Scan through all subchannels that may be concerned and | |
217 | * do a validation on those. | |
218 | * The more information we have (info), the less scanning | |
219 | * will we have to do. | |
220 | */ | |
e82a1567 | 221 | for_each_subchannel_staged(__s390_process_res_acc, |
99611f87 | 222 | s390_process_res_acc_new_sch, link); |
1da177e4 LT |
223 | } |
224 | ||
225 | static int | |
226 | __get_chpid_from_lir(void *data) | |
227 | { | |
228 | struct lir { | |
229 | u8 iq; | |
230 | u8 ic; | |
231 | u16 sci; | |
232 | /* incident-node descriptor */ | |
233 | u32 indesc[28]; | |
234 | /* attached-node descriptor */ | |
235 | u32 andesc[28]; | |
236 | /* incident-specific information */ | |
237 | u32 isinfo[28]; | |
0f008aa3 | 238 | } __attribute__ ((packed)) *lir; |
1da177e4 | 239 | |
12975aef | 240 | lir = data; |
1da177e4 LT |
241 | if (!(lir->iq&0x80)) |
242 | /* NULL link incident record */ | |
243 | return -EINVAL; | |
244 | if (!(lir->indesc[0]&0xc0000000)) | |
245 | /* node descriptor not valid */ | |
246 | return -EINVAL; | |
247 | if (!(lir->indesc[0]&0x10000000)) | |
248 | /* don't handle device-type nodes - FIXME */ | |
249 | return -EINVAL; | |
250 | /* Byte 3 contains the chpid. Could also be CTCA, but we don't care */ | |
251 | ||
252 | return (u16) (lir->indesc[0]&0x000000ff); | |
253 | } | |
254 | ||
184357a5 PO |
255 | struct chsc_sei_area { |
256 | struct chsc_header request; | |
257 | u32 reserved1; | |
258 | u32 reserved2; | |
259 | u32 reserved3; | |
260 | struct chsc_header response; | |
261 | u32 reserved4; | |
262 | u8 flags; | |
263 | u8 vf; /* validity flags */ | |
264 | u8 rs; /* reporting source */ | |
265 | u8 cc; /* content code */ | |
266 | u16 fla; /* full link address */ | |
267 | u16 rsid; /* reporting source id */ | |
268 | u32 reserved5; | |
269 | u32 reserved6; | |
270 | u8 ccdf[4096 - 16 - 24]; /* content-code dependent field */ | |
271 | /* ccdf has to be big enough for a link-incident record */ | |
272 | } __attribute__ ((packed)); | |
273 | ||
83b3370c | 274 | static void chsc_process_sei_link_incident(struct chsc_sei_area *sei_area) |
184357a5 | 275 | { |
f86635fa PO |
276 | struct chp_id chpid; |
277 | int id; | |
184357a5 PO |
278 | |
279 | CIO_CRW_EVENT(4, "chsc: link incident (rs=%02x, rs_id=%04x)\n", | |
280 | sei_area->rs, sei_area->rsid); | |
281 | if (sei_area->rs != 4) | |
83b3370c | 282 | return; |
f86635fa PO |
283 | id = __get_chpid_from_lir(sei_area->ccdf); |
284 | if (id < 0) | |
184357a5 | 285 | CIO_CRW_EVENT(4, "chsc: link incident - invalid LIR\n"); |
f86635fa PO |
286 | else { |
287 | chp_id_init(&chpid); | |
288 | chpid.id = id; | |
e6b6e10a | 289 | chsc_chp_offline(chpid); |
f86635fa | 290 | } |
184357a5 PO |
291 | } |
292 | ||
83b3370c | 293 | static void chsc_process_sei_res_acc(struct chsc_sei_area *sei_area) |
1da177e4 | 294 | { |
99611f87 | 295 | struct chp_link link; |
f86635fa | 296 | struct chp_id chpid; |
184357a5 | 297 | int status; |
184357a5 PO |
298 | |
299 | CIO_CRW_EVENT(4, "chsc: resource accessibility event (rs=%02x, " | |
300 | "rs_id=%04x)\n", sei_area->rs, sei_area->rsid); | |
301 | if (sei_area->rs != 4) | |
83b3370c | 302 | return; |
f86635fa PO |
303 | chp_id_init(&chpid); |
304 | chpid.id = sei_area->rsid; | |
184357a5 | 305 | /* allocate a new channel path structure, if needed */ |
e6b6e10a | 306 | status = chp_get_status(chpid); |
184357a5 | 307 | if (status < 0) |
e6b6e10a | 308 | chp_new(chpid); |
184357a5 | 309 | else if (!status) |
83b3370c | 310 | return; |
99611f87 CH |
311 | memset(&link, 0, sizeof(struct chp_link)); |
312 | link.chpid = chpid; | |
184357a5 | 313 | if ((sei_area->vf & 0xc0) != 0) { |
99611f87 | 314 | link.fla = sei_area->fla; |
184357a5 PO |
315 | if ((sei_area->vf & 0xc0) == 0xc0) |
316 | /* full link address */ | |
99611f87 | 317 | link.fla_mask = 0xffff; |
184357a5 PO |
318 | else |
319 | /* link address */ | |
99611f87 | 320 | link.fla_mask = 0xff00; |
184357a5 | 321 | } |
99611f87 | 322 | s390_process_res_acc(&link); |
184357a5 PO |
323 | } |
324 | ||
e5854a58 PO |
325 | struct chp_config_data { |
326 | u8 map[32]; | |
327 | u8 op; | |
328 | u8 pc; | |
329 | }; | |
330 | ||
83b3370c | 331 | static void chsc_process_sei_chp_config(struct chsc_sei_area *sei_area) |
e5854a58 PO |
332 | { |
333 | struct chp_config_data *data; | |
334 | struct chp_id chpid; | |
335 | int num; | |
336 | ||
337 | CIO_CRW_EVENT(4, "chsc: channel-path-configuration notification\n"); | |
338 | if (sei_area->rs != 0) | |
83b3370c | 339 | return; |
e5854a58 PO |
340 | data = (struct chp_config_data *) &(sei_area->ccdf); |
341 | chp_id_init(&chpid); | |
342 | for (num = 0; num <= __MAX_CHPID; num++) { | |
343 | if (!chp_test_bit(data->map, num)) | |
344 | continue; | |
345 | chpid.id = num; | |
346 | printk(KERN_WARNING "cio: processing configure event %d for " | |
347 | "chpid %x.%02x\n", data->op, chpid.cssid, chpid.id); | |
348 | switch (data->op) { | |
349 | case 0: | |
350 | chp_cfg_schedule(chpid, 1); | |
351 | break; | |
352 | case 1: | |
353 | chp_cfg_schedule(chpid, 0); | |
354 | break; | |
355 | case 2: | |
356 | chp_cfg_cancel_deconfigure(chpid); | |
357 | break; | |
358 | } | |
359 | } | |
e5854a58 PO |
360 | } |
361 | ||
83b3370c | 362 | static void chsc_process_sei(struct chsc_sei_area *sei_area) |
184357a5 | 363 | { |
184357a5 | 364 | /* Check if we might have lost some information. */ |
83b3370c | 365 | if (sei_area->flags & 0x40) { |
184357a5 | 366 | CIO_CRW_EVENT(2, "chsc: event overflow\n"); |
83b3370c PO |
367 | css_schedule_eval_all(); |
368 | } | |
184357a5 | 369 | /* which kind of information was stored? */ |
184357a5 PO |
370 | switch (sei_area->cc) { |
371 | case 1: /* link incident*/ | |
83b3370c | 372 | chsc_process_sei_link_incident(sei_area); |
184357a5 PO |
373 | break; |
374 | case 2: /* i/o resource accessibiliy */ | |
83b3370c | 375 | chsc_process_sei_res_acc(sei_area); |
184357a5 | 376 | break; |
e5854a58 | 377 | case 8: /* channel-path-configuration notification */ |
83b3370c | 378 | chsc_process_sei_chp_config(sei_area); |
e5854a58 | 379 | break; |
184357a5 PO |
380 | default: /* other stuff */ |
381 | CIO_CRW_EVENT(4, "chsc: unhandled sei content code %d\n", | |
382 | sei_area->cc); | |
383 | break; | |
384 | } | |
184357a5 PO |
385 | } |
386 | ||
c1156189 | 387 | static void chsc_process_crw(struct crw *crw0, struct crw *crw1, int overflow) |
184357a5 PO |
388 | { |
389 | struct chsc_sei_area *sei_area; | |
1da177e4 | 390 | |
c1156189 CH |
391 | if (overflow) { |
392 | css_schedule_eval_all(); | |
393 | return; | |
394 | } | |
395 | CIO_CRW_EVENT(2, "CRW reports slct=%d, oflw=%d, " | |
396 | "chn=%d, rsc=%X, anc=%d, erc=%X, rsid=%X\n", | |
397 | crw0->slct, crw0->oflw, crw0->chn, crw0->rsc, crw0->anc, | |
398 | crw0->erc, crw0->rsid); | |
1da177e4 | 399 | if (!sei_page) |
83b3370c | 400 | return; |
184357a5 PO |
401 | /* Access to sei_page is serialized through machine check handler |
402 | * thread, so no need for locking. */ | |
1da177e4 LT |
403 | sei_area = sei_page; |
404 | ||
c1156189 | 405 | CIO_TRACE_EVENT(2, "prcss"); |
1da177e4 | 406 | do { |
1da177e4 | 407 | memset(sei_area, 0, sizeof(*sei_area)); |
495a5b45 CH |
408 | sei_area->request.length = 0x0010; |
409 | sei_area->request.code = 0x000e; | |
184357a5 PO |
410 | if (chsc(sei_area)) |
411 | break; | |
1da177e4 | 412 | |
184357a5 PO |
413 | if (sei_area->response.code == 0x0001) { |
414 | CIO_CRW_EVENT(4, "chsc: sei successful\n"); | |
83b3370c | 415 | chsc_process_sei(sei_area); |
184357a5 PO |
416 | } else { |
417 | CIO_CRW_EVENT(2, "chsc: sei failed (rc=%04x)\n", | |
1da177e4 | 418 | sei_area->response.code); |
1da177e4 LT |
419 | break; |
420 | } | |
421 | } while (sei_area->flags & 0x80); | |
1da177e4 LT |
422 | } |
423 | ||
83b3370c | 424 | void chsc_chp_online(struct chp_id chpid) |
f97a56fb | 425 | { |
1da177e4 | 426 | char dbf_txt[15]; |
99611f87 | 427 | struct chp_link link; |
1da177e4 | 428 | |
f86635fa | 429 | sprintf(dbf_txt, "cadd%x.%02x", chpid.cssid, chpid.id); |
1da177e4 LT |
430 | CIO_TRACE_EVENT(2, dbf_txt); |
431 | ||
22806dc1 | 432 | if (chp_get_status(chpid) != 0) { |
99611f87 CH |
433 | memset(&link, 0, sizeof(struct chp_link)); |
434 | link.chpid = chpid; | |
22806dc1 CH |
435 | /* Wait until previous actions have settled. */ |
436 | css_wait_for_slow_path(); | |
c820de39 | 437 | for_each_subchannel_staged(__s390_process_res_acc, NULL, |
99611f87 | 438 | &link); |
22806dc1 | 439 | } |
1da177e4 LT |
440 | } |
441 | ||
f86635fa PO |
442 | static void __s390_subchannel_vary_chpid(struct subchannel *sch, |
443 | struct chp_id chpid, int on) | |
1da177e4 | 444 | { |
1da177e4 | 445 | unsigned long flags; |
99611f87 | 446 | struct chp_link link; |
1da177e4 | 447 | |
99611f87 CH |
448 | memset(&link, 0, sizeof(struct chp_link)); |
449 | link.chpid = chpid; | |
2ec22984 | 450 | spin_lock_irqsave(sch->lock, flags); |
c820de39 | 451 | if (sch->driver && sch->driver->chp_event) |
99611f87 | 452 | sch->driver->chp_event(sch, &link, |
c820de39 | 453 | on ? CHP_VARY_ON : CHP_VARY_OFF); |
2ec22984 | 454 | spin_unlock_irqrestore(sch->lock, flags); |
1da177e4 LT |
455 | } |
456 | ||
e82a1567 | 457 | static int s390_subchannel_vary_chpid_off(struct subchannel *sch, void *data) |
1da177e4 | 458 | { |
e82a1567 | 459 | struct chp_id *chpid = data; |
1da177e4 LT |
460 | |
461 | __s390_subchannel_vary_chpid(sch, *chpid, 0); | |
462 | return 0; | |
463 | } | |
464 | ||
e82a1567 | 465 | static int s390_subchannel_vary_chpid_on(struct subchannel *sch, void *data) |
1da177e4 | 466 | { |
e82a1567 | 467 | struct chp_id *chpid = data; |
1da177e4 LT |
468 | |
469 | __s390_subchannel_vary_chpid(sch, *chpid, 1); | |
470 | return 0; | |
471 | } | |
472 | ||
f97a56fb CH |
473 | static int |
474 | __s390_vary_chpid_on(struct subchannel_id schid, void *data) | |
475 | { | |
476 | struct schib schib; | |
f97a56fb | 477 | |
fb6958a5 | 478 | if (stsch_err(schid, &schib)) |
f97a56fb CH |
479 | /* We're through */ |
480 | return -ENXIO; | |
481 | /* Put it on the slow path. */ | |
83b3370c | 482 | css_schedule_eval(schid); |
f97a56fb CH |
483 | return 0; |
484 | } | |
485 | ||
e6b6e10a PO |
486 | /** |
487 | * chsc_chp_vary - propagate channel-path vary operation to subchannels | |
488 | * @chpid: channl-path ID | |
489 | * @on: non-zero for vary online, zero for vary offline | |
1da177e4 | 490 | */ |
e6b6e10a | 491 | int chsc_chp_vary(struct chp_id chpid, int on) |
1da177e4 | 492 | { |
99611f87 CH |
493 | struct chp_link link; |
494 | ||
495 | memset(&link, 0, sizeof(struct chp_link)); | |
496 | link.chpid = chpid; | |
22806dc1 CH |
497 | /* Wait until previous actions have settled. */ |
498 | css_wait_for_slow_path(); | |
1da177e4 LT |
499 | /* |
500 | * Redo PathVerification on the devices the chpid connects to | |
501 | */ | |
502 | ||
f97a56fb | 503 | if (on) |
e82a1567 | 504 | for_each_subchannel_staged(s390_subchannel_vary_chpid_on, |
99611f87 | 505 | __s390_vary_chpid_on, &link); |
e82a1567 PO |
506 | else |
507 | for_each_subchannel_staged(s390_subchannel_vary_chpid_off, | |
99611f87 | 508 | NULL, &link); |
e82a1567 | 509 | |
1da177e4 LT |
510 | return 0; |
511 | } | |
512 | ||
495a5b45 CH |
513 | static void |
514 | chsc_remove_cmg_attr(struct channel_subsystem *css) | |
515 | { | |
516 | int i; | |
517 | ||
518 | for (i = 0; i <= __MAX_CHPID; i++) { | |
519 | if (!css->chps[i]) | |
520 | continue; | |
e6b6e10a | 521 | chp_remove_cmg_attr(css->chps[i]); |
495a5b45 CH |
522 | } |
523 | } | |
524 | ||
525 | static int | |
526 | chsc_add_cmg_attr(struct channel_subsystem *css) | |
527 | { | |
528 | int i, ret; | |
529 | ||
530 | ret = 0; | |
531 | for (i = 0; i <= __MAX_CHPID; i++) { | |
532 | if (!css->chps[i]) | |
533 | continue; | |
e6b6e10a | 534 | ret = chp_add_cmg_attr(css->chps[i]); |
495a5b45 CH |
535 | if (ret) |
536 | goto cleanup; | |
537 | } | |
538 | return ret; | |
539 | cleanup: | |
540 | for (--i; i >= 0; i--) { | |
541 | if (!css->chps[i]) | |
542 | continue; | |
e6b6e10a | 543 | chp_remove_cmg_attr(css->chps[i]); |
495a5b45 CH |
544 | } |
545 | return ret; | |
546 | } | |
547 | ||
495a5b45 CH |
548 | static int |
549 | __chsc_do_secm(struct channel_subsystem *css, int enable, void *page) | |
550 | { | |
551 | struct { | |
552 | struct chsc_header request; | |
553 | u32 operation_code : 2; | |
554 | u32 : 30; | |
555 | u32 key : 4; | |
556 | u32 : 28; | |
557 | u32 zeroes1; | |
558 | u32 cub_addr1; | |
559 | u32 zeroes2; | |
560 | u32 cub_addr2; | |
561 | u32 reserved[13]; | |
562 | struct chsc_header response; | |
563 | u32 status : 8; | |
564 | u32 : 4; | |
565 | u32 fmt : 4; | |
566 | u32 : 16; | |
0f008aa3 | 567 | } __attribute__ ((packed)) *secm_area; |
495a5b45 CH |
568 | int ret, ccode; |
569 | ||
570 | secm_area = page; | |
571 | secm_area->request.length = 0x0050; | |
572 | secm_area->request.code = 0x0016; | |
573 | ||
574 | secm_area->key = PAGE_DEFAULT_KEY; | |
575 | secm_area->cub_addr1 = (u64)(unsigned long)css->cub_addr1; | |
576 | secm_area->cub_addr2 = (u64)(unsigned long)css->cub_addr2; | |
577 | ||
578 | secm_area->operation_code = enable ? 0 : 1; | |
579 | ||
580 | ccode = chsc(secm_area); | |
581 | if (ccode > 0) | |
582 | return (ccode == 3) ? -ENODEV : -EBUSY; | |
583 | ||
584 | switch (secm_area->response.code) { | |
b9c9a21a CH |
585 | case 0x0102: |
586 | case 0x0103: | |
495a5b45 | 587 | ret = -EINVAL; |
495a5b45 | 588 | default: |
b9c9a21a | 589 | ret = chsc_error_from_response(secm_area->response.code); |
495a5b45 | 590 | } |
b9c9a21a CH |
591 | if (ret != 0) |
592 | CIO_CRW_EVENT(2, "chsc: secm failed (rc=%04x)\n", | |
593 | secm_area->response.code); | |
495a5b45 CH |
594 | return ret; |
595 | } | |
596 | ||
597 | int | |
598 | chsc_secm(struct channel_subsystem *css, int enable) | |
599 | { | |
600 | void *secm_area; | |
601 | int ret; | |
602 | ||
603 | secm_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
604 | if (!secm_area) | |
605 | return -ENOMEM; | |
606 | ||
495a5b45 CH |
607 | if (enable && !css->cm_enabled) { |
608 | css->cub_addr1 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
609 | css->cub_addr2 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
610 | if (!css->cub_addr1 || !css->cub_addr2) { | |
611 | free_page((unsigned long)css->cub_addr1); | |
612 | free_page((unsigned long)css->cub_addr2); | |
613 | free_page((unsigned long)secm_area); | |
495a5b45 CH |
614 | return -ENOMEM; |
615 | } | |
616 | } | |
617 | ret = __chsc_do_secm(css, enable, secm_area); | |
618 | if (!ret) { | |
619 | css->cm_enabled = enable; | |
620 | if (css->cm_enabled) { | |
621 | ret = chsc_add_cmg_attr(css); | |
622 | if (ret) { | |
623 | memset(secm_area, 0, PAGE_SIZE); | |
624 | __chsc_do_secm(css, 0, secm_area); | |
625 | css->cm_enabled = 0; | |
626 | } | |
627 | } else | |
628 | chsc_remove_cmg_attr(css); | |
629 | } | |
8c4941c5 | 630 | if (!css->cm_enabled) { |
495a5b45 CH |
631 | free_page((unsigned long)css->cub_addr1); |
632 | free_page((unsigned long)css->cub_addr2); | |
633 | } | |
495a5b45 CH |
634 | free_page((unsigned long)secm_area); |
635 | return ret; | |
636 | } | |
637 | ||
9d92a7e1 CH |
638 | int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt, |
639 | int c, int m, | |
640 | struct chsc_response_struct *resp) | |
1da177e4 LT |
641 | { |
642 | int ccode, ret; | |
643 | ||
644 | struct { | |
645 | struct chsc_header request; | |
9d92a7e1 CH |
646 | u32 : 2; |
647 | u32 m : 1; | |
648 | u32 c : 1; | |
649 | u32 fmt : 4; | |
650 | u32 cssid : 8; | |
651 | u32 : 4; | |
652 | u32 rfmt : 4; | |
1da177e4 LT |
653 | u32 first_chpid : 8; |
654 | u32 : 24; | |
655 | u32 last_chpid : 8; | |
656 | u32 zeroes1; | |
657 | struct chsc_header response; | |
9d92a7e1 | 658 | u8 data[PAGE_SIZE - 20]; |
0f008aa3 | 659 | } __attribute__ ((packed)) *scpd_area; |
1da177e4 | 660 | |
9d92a7e1 CH |
661 | if ((rfmt == 1) && !css_general_characteristics.fcs) |
662 | return -EINVAL; | |
663 | if ((rfmt == 2) && !css_general_characteristics.cib) | |
664 | return -EINVAL; | |
1da177e4 LT |
665 | scpd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
666 | if (!scpd_area) | |
667 | return -ENOMEM; | |
668 | ||
495a5b45 CH |
669 | scpd_area->request.length = 0x0010; |
670 | scpd_area->request.code = 0x0002; | |
1da177e4 | 671 | |
9d92a7e1 | 672 | scpd_area->cssid = chpid.cssid; |
f86635fa PO |
673 | scpd_area->first_chpid = chpid.id; |
674 | scpd_area->last_chpid = chpid.id; | |
9d92a7e1 CH |
675 | scpd_area->m = m; |
676 | scpd_area->c = c; | |
677 | scpd_area->fmt = fmt; | |
678 | scpd_area->rfmt = rfmt; | |
1da177e4 LT |
679 | |
680 | ccode = chsc(scpd_area); | |
681 | if (ccode > 0) { | |
682 | ret = (ccode == 3) ? -ENODEV : -EBUSY; | |
683 | goto out; | |
684 | } | |
685 | ||
b9c9a21a CH |
686 | ret = chsc_error_from_response(scpd_area->response.code); |
687 | if (ret == 0) | |
688 | /* Success. */ | |
9d92a7e1 | 689 | memcpy(resp, &scpd_area->response, scpd_area->response.length); |
b9c9a21a CH |
690 | else |
691 | CIO_CRW_EVENT(2, "chsc: scpd failed (rc=%04x)\n", | |
1da177e4 | 692 | scpd_area->response.code); |
1da177e4 LT |
693 | out: |
694 | free_page((unsigned long)scpd_area); | |
695 | return ret; | |
696 | } | |
9d92a7e1 CH |
697 | EXPORT_SYMBOL_GPL(chsc_determine_channel_path_desc); |
698 | ||
699 | int chsc_determine_base_channel_path_desc(struct chp_id chpid, | |
700 | struct channel_path_desc *desc) | |
701 | { | |
702 | struct chsc_response_struct *chsc_resp; | |
703 | int ret; | |
704 | ||
705 | chsc_resp = kzalloc(sizeof(*chsc_resp), GFP_KERNEL); | |
706 | if (!chsc_resp) | |
707 | return -ENOMEM; | |
708 | ret = chsc_determine_channel_path_desc(chpid, 0, 0, 0, 0, chsc_resp); | |
709 | if (ret) | |
710 | goto out_free; | |
711 | memcpy(desc, &chsc_resp->data, chsc_resp->length); | |
712 | out_free: | |
713 | kfree(chsc_resp); | |
714 | return ret; | |
715 | } | |
1da177e4 | 716 | |
495a5b45 CH |
717 | static void |
718 | chsc_initialize_cmg_chars(struct channel_path *chp, u8 cmcv, | |
719 | struct cmg_chars *chars) | |
720 | { | |
721 | switch (chp->cmg) { | |
722 | case 2: | |
723 | case 3: | |
724 | chp->cmg_chars = kmalloc(sizeof(struct cmg_chars), | |
725 | GFP_KERNEL); | |
726 | if (chp->cmg_chars) { | |
727 | int i, mask; | |
728 | struct cmg_chars *cmg_chars; | |
729 | ||
730 | cmg_chars = chp->cmg_chars; | |
731 | for (i = 0; i < NR_MEASUREMENT_CHARS; i++) { | |
732 | mask = 0x80 >> (i + 3); | |
733 | if (cmcv & mask) | |
734 | cmg_chars->values[i] = chars->values[i]; | |
735 | else | |
736 | cmg_chars->values[i] = 0; | |
737 | } | |
738 | } | |
739 | break; | |
740 | default: | |
741 | /* No cmg-dependent data. */ | |
742 | break; | |
743 | } | |
744 | } | |
745 | ||
e6b6e10a | 746 | int chsc_get_channel_measurement_chars(struct channel_path *chp) |
495a5b45 CH |
747 | { |
748 | int ccode, ret; | |
749 | ||
750 | struct { | |
751 | struct chsc_header request; | |
752 | u32 : 24; | |
753 | u32 first_chpid : 8; | |
754 | u32 : 24; | |
755 | u32 last_chpid : 8; | |
756 | u32 zeroes1; | |
757 | struct chsc_header response; | |
758 | u32 zeroes2; | |
759 | u32 not_valid : 1; | |
760 | u32 shared : 1; | |
761 | u32 : 22; | |
762 | u32 chpid : 8; | |
763 | u32 cmcv : 5; | |
764 | u32 : 11; | |
765 | u32 cmgq : 8; | |
766 | u32 cmg : 8; | |
767 | u32 zeroes3; | |
768 | u32 data[NR_MEASUREMENT_CHARS]; | |
0f008aa3 | 769 | } __attribute__ ((packed)) *scmc_area; |
495a5b45 CH |
770 | |
771 | scmc_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
772 | if (!scmc_area) | |
773 | return -ENOMEM; | |
774 | ||
775 | scmc_area->request.length = 0x0010; | |
776 | scmc_area->request.code = 0x0022; | |
777 | ||
f86635fa PO |
778 | scmc_area->first_chpid = chp->chpid.id; |
779 | scmc_area->last_chpid = chp->chpid.id; | |
495a5b45 CH |
780 | |
781 | ccode = chsc(scmc_area); | |
782 | if (ccode > 0) { | |
783 | ret = (ccode == 3) ? -ENODEV : -EBUSY; | |
784 | goto out; | |
785 | } | |
786 | ||
b9c9a21a CH |
787 | ret = chsc_error_from_response(scmc_area->response.code); |
788 | if (ret == 0) { | |
789 | /* Success. */ | |
495a5b45 CH |
790 | if (!scmc_area->not_valid) { |
791 | chp->cmg = scmc_area->cmg; | |
792 | chp->shared = scmc_area->shared; | |
793 | chsc_initialize_cmg_chars(chp, scmc_area->cmcv, | |
794 | (struct cmg_chars *) | |
795 | &scmc_area->data); | |
796 | } else { | |
797 | chp->cmg = -1; | |
798 | chp->shared = -1; | |
799 | } | |
b9c9a21a CH |
800 | } else { |
801 | CIO_CRW_EVENT(2, "chsc: scmc failed (rc=%04x)\n", | |
495a5b45 | 802 | scmc_area->response.code); |
495a5b45 CH |
803 | } |
804 | out: | |
805 | free_page((unsigned long)scmc_area); | |
806 | return ret; | |
807 | } | |
808 | ||
4434a38c | 809 | int __init chsc_alloc_sei_area(void) |
1da177e4 | 810 | { |
c1156189 CH |
811 | int ret; |
812 | ||
1da177e4 | 813 | sei_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
c1156189 | 814 | if (!sei_page) { |
e556bbbd CH |
815 | CIO_MSG_EVENT(0, "Can't allocate page for processing of " |
816 | "chsc machine checks!\n"); | |
c1156189 CH |
817 | return -ENOMEM; |
818 | } | |
819 | ret = s390_register_crw_handler(CRW_RSC_CSS, chsc_process_crw); | |
820 | if (ret) | |
821 | kfree(sei_page); | |
822 | return ret; | |
1da177e4 LT |
823 | } |
824 | ||
4434a38c CH |
825 | void __init chsc_free_sei_area(void) |
826 | { | |
c1156189 | 827 | s390_unregister_crw_handler(CRW_RSC_CSS); |
4434a38c CH |
828 | kfree(sei_page); |
829 | } | |
830 | ||
fb6958a5 CH |
831 | int __init |
832 | chsc_enable_facility(int operation_code) | |
833 | { | |
834 | int ret; | |
835 | struct { | |
836 | struct chsc_header request; | |
837 | u8 reserved1:4; | |
838 | u8 format:4; | |
839 | u8 reserved2; | |
840 | u16 operation_code; | |
841 | u32 reserved3; | |
842 | u32 reserved4; | |
843 | u32 operation_data_area[252]; | |
844 | struct chsc_header response; | |
845 | u32 reserved5:4; | |
846 | u32 format2:4; | |
847 | u32 reserved6:24; | |
0f008aa3 | 848 | } __attribute__ ((packed)) *sda_area; |
fb6958a5 CH |
849 | |
850 | sda_area = (void *)get_zeroed_page(GFP_KERNEL|GFP_DMA); | |
851 | if (!sda_area) | |
852 | return -ENOMEM; | |
495a5b45 CH |
853 | sda_area->request.length = 0x0400; |
854 | sda_area->request.code = 0x0031; | |
fb6958a5 CH |
855 | sda_area->operation_code = operation_code; |
856 | ||
857 | ret = chsc(sda_area); | |
858 | if (ret > 0) { | |
859 | ret = (ret == 3) ? -ENODEV : -EBUSY; | |
860 | goto out; | |
861 | } | |
b9c9a21a | 862 | |
fb6958a5 | 863 | switch (sda_area->response.code) { |
b9c9a21a | 864 | case 0x0101: |
fb6958a5 CH |
865 | ret = -EOPNOTSUPP; |
866 | break; | |
b9c9a21a CH |
867 | default: |
868 | ret = chsc_error_from_response(sda_area->response.code); | |
fb6958a5 | 869 | } |
b9c9a21a CH |
870 | if (ret != 0) |
871 | CIO_CRW_EVENT(2, "chsc: sda (oc=%x) failed (rc=%04x)\n", | |
872 | operation_code, sda_area->response.code); | |
fb6958a5 CH |
873 | out: |
874 | free_page((unsigned long)sda_area); | |
875 | return ret; | |
876 | } | |
877 | ||
1da177e4 LT |
878 | struct css_general_char css_general_characteristics; |
879 | struct css_chsc_char css_chsc_characteristics; | |
880 | ||
881 | int __init | |
882 | chsc_determine_css_characteristics(void) | |
883 | { | |
884 | int result; | |
885 | struct { | |
886 | struct chsc_header request; | |
887 | u32 reserved1; | |
888 | u32 reserved2; | |
889 | u32 reserved3; | |
890 | struct chsc_header response; | |
891 | u32 reserved4; | |
892 | u32 general_char[510]; | |
893 | u32 chsc_char[518]; | |
0f008aa3 | 894 | } __attribute__ ((packed)) *scsc_area; |
1da177e4 LT |
895 | |
896 | scsc_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
b9c9a21a | 897 | if (!scsc_area) |
1da177e4 | 898 | return -ENOMEM; |
1da177e4 | 899 | |
495a5b45 CH |
900 | scsc_area->request.length = 0x0010; |
901 | scsc_area->request.code = 0x0010; | |
1da177e4 LT |
902 | |
903 | result = chsc(scsc_area); | |
904 | if (result) { | |
b9c9a21a | 905 | result = (result == 3) ? -ENODEV : -EBUSY; |
1da177e4 LT |
906 | goto exit; |
907 | } | |
908 | ||
b9c9a21a CH |
909 | result = chsc_error_from_response(scsc_area->response.code); |
910 | if (result == 0) { | |
911 | memcpy(&css_general_characteristics, scsc_area->general_char, | |
912 | sizeof(css_general_characteristics)); | |
913 | memcpy(&css_chsc_characteristics, scsc_area->chsc_char, | |
914 | sizeof(css_chsc_characteristics)); | |
915 | } else | |
916 | CIO_CRW_EVENT(2, "chsc: scsc failed (rc=%04x)\n", | |
917 | scsc_area->response.code); | |
1da177e4 LT |
918 | exit: |
919 | free_page ((unsigned long) scsc_area); | |
920 | return result; | |
921 | } | |
922 | ||
923 | EXPORT_SYMBOL_GPL(css_general_characteristics); | |
924 | EXPORT_SYMBOL_GPL(css_chsc_characteristics); | |
d2fec595 MS |
925 | |
926 | int chsc_sstpc(void *page, unsigned int op, u16 ctrl) | |
927 | { | |
928 | struct { | |
929 | struct chsc_header request; | |
930 | unsigned int rsvd0; | |
931 | unsigned int op : 8; | |
932 | unsigned int rsvd1 : 8; | |
933 | unsigned int ctrl : 16; | |
934 | unsigned int rsvd2[5]; | |
935 | struct chsc_header response; | |
936 | unsigned int rsvd3[7]; | |
937 | } __attribute__ ((packed)) *rr; | |
938 | int rc; | |
939 | ||
940 | memset(page, 0, PAGE_SIZE); | |
941 | rr = page; | |
942 | rr->request.length = 0x0020; | |
943 | rr->request.code = 0x0033; | |
944 | rr->op = op; | |
945 | rr->ctrl = ctrl; | |
946 | rc = chsc(rr); | |
947 | if (rc) | |
948 | return -EIO; | |
949 | rc = (rr->response.code == 0x0001) ? 0 : -EIO; | |
950 | return rc; | |
951 | } | |
952 | ||
953 | int chsc_sstpi(void *page, void *result, size_t size) | |
954 | { | |
955 | struct { | |
956 | struct chsc_header request; | |
957 | unsigned int rsvd0[3]; | |
958 | struct chsc_header response; | |
959 | char data[size]; | |
960 | } __attribute__ ((packed)) *rr; | |
961 | int rc; | |
962 | ||
963 | memset(page, 0, PAGE_SIZE); | |
964 | rr = page; | |
965 | rr->request.length = 0x0010; | |
966 | rr->request.code = 0x0038; | |
967 | rc = chsc(rr); | |
968 | if (rc) | |
969 | return -EIO; | |
970 | memcpy(result, &rr->data, size); | |
971 | return (rr->response.code == 0x0001) ? 0 : -EIO; | |
972 | } | |
973 |