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