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