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