Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 | 2 | * S/390 common I/O routines -- channel subsystem call |
1da177e4 | 3 | * |
cbc0dd1f | 4 | * Copyright IBM Corp. 1999,2012 |
1da177e4 | 5 | * Author(s): Ingo Adlung (adlung@de.ibm.com) |
4ce3b30c | 6 | * Cornelia Huck (cornelia.huck@de.ibm.com) |
1da177e4 LT |
7 | * Arnd Bergmann (arndb@de.ibm.com) |
8 | */ | |
9 | ||
e6d5a428 ME |
10 | #define KMSG_COMPONENT "cio" |
11 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
12 | ||
1da177e4 | 13 | #include <linux/module.h> |
1da177e4 LT |
14 | #include <linux/slab.h> |
15 | #include <linux/init.h> | |
16 | #include <linux/device.h> | |
cbc0dd1f | 17 | #include <linux/pci.h> |
1da177e4 LT |
18 | |
19 | #include <asm/cio.h> | |
e5854a58 | 20 | #include <asm/chpid.h> |
9d92a7e1 | 21 | #include <asm/chsc.h> |
f5daba1d | 22 | #include <asm/crw.h> |
ca4ba153 | 23 | #include <asm/isc.h> |
1da177e4 LT |
24 | |
25 | #include "css.h" | |
26 | #include "cio.h" | |
27 | #include "cio_debug.h" | |
28 | #include "ioasm.h" | |
e6b6e10a | 29 | #include "chp.h" |
1da177e4 LT |
30 | #include "chsc.h" |
31 | ||
1da177e4 | 32 | static void *sei_page; |
34196f82 SO |
33 | static void *chsc_page; |
34 | static DEFINE_SPINLOCK(chsc_page_lock); | |
1da177e4 | 35 | |
dae39843 CH |
36 | /** |
37 | * chsc_error_from_response() - convert a chsc response to an error | |
38 | * @response: chsc response code | |
39 | * | |
40 | * Returns an appropriate Linux error code for @response. | |
41 | */ | |
42 | int chsc_error_from_response(int response) | |
b9c9a21a CH |
43 | { |
44 | switch (response) { | |
45 | case 0x0001: | |
46 | return 0; | |
47 | case 0x0002: | |
48 | case 0x0003: | |
49 | case 0x0006: | |
50 | case 0x0007: | |
51 | case 0x0008: | |
52 | case 0x000a: | |
fd0457a6 | 53 | case 0x0104: |
b9c9a21a CH |
54 | return -EINVAL; |
55 | case 0x0004: | |
56 | return -EOPNOTSUPP; | |
184b08af | 57 | case 0x000b: |
1c59a861 | 58 | case 0x0107: /* "Channel busy" for the op 0x003d */ |
184b08af SO |
59 | return -EBUSY; |
60 | case 0x0100: | |
61 | case 0x0102: | |
62 | return -ENOMEM; | |
b9c9a21a CH |
63 | default: |
64 | return -EIO; | |
65 | } | |
66 | } | |
dae39843 | 67 | EXPORT_SYMBOL_GPL(chsc_error_from_response); |
b9c9a21a | 68 | |
7ad6a249 PO |
69 | struct chsc_ssd_area { |
70 | struct chsc_header request; | |
71 | u16 :10; | |
72 | u16 ssid:2; | |
73 | u16 :4; | |
74 | u16 f_sch; /* first subchannel */ | |
75 | u16 :16; | |
76 | u16 l_sch; /* last subchannel */ | |
77 | u32 :32; | |
78 | struct chsc_header response; | |
79 | u32 :32; | |
80 | u8 sch_valid : 1; | |
81 | u8 dev_valid : 1; | |
82 | u8 st : 3; /* subchannel type */ | |
83 | u8 zeroes : 3; | |
84 | u8 unit_addr; /* unit address */ | |
85 | u16 devno; /* device number */ | |
86 | u8 path_mask; | |
87 | u8 fla_valid_mask; | |
88 | u16 sch; /* subchannel */ | |
89 | u8 chpid[8]; /* chpids 0-7 */ | |
90 | u16 fla[8]; /* full link addresses 0-7 */ | |
91 | } __attribute__ ((packed)); | |
92 | ||
93 | int chsc_get_ssd_info(struct subchannel_id schid, struct chsc_ssd_info *ssd) | |
1da177e4 | 94 | { |
7ad6a249 PO |
95 | struct chsc_ssd_area *ssd_area; |
96 | int ccode; | |
97 | int ret; | |
98 | int i; | |
99 | int mask; | |
1da177e4 | 100 | |
34196f82 SO |
101 | spin_lock_irq(&chsc_page_lock); |
102 | memset(chsc_page, 0, PAGE_SIZE); | |
103 | ssd_area = chsc_page; | |
495a5b45 CH |
104 | ssd_area->request.length = 0x0010; |
105 | ssd_area->request.code = 0x0004; | |
7ad6a249 PO |
106 | ssd_area->ssid = schid.ssid; |
107 | ssd_area->f_sch = schid.sch_no; | |
108 | ssd_area->l_sch = schid.sch_no; | |
1da177e4 LT |
109 | |
110 | ccode = chsc(ssd_area); | |
7ad6a249 | 111 | /* Check response. */ |
1da177e4 | 112 | if (ccode > 0) { |
7ad6a249 | 113 | ret = (ccode == 3) ? -ENODEV : -EBUSY; |
34196f82 | 114 | goto out; |
1da177e4 | 115 | } |
b9c9a21a CH |
116 | ret = chsc_error_from_response(ssd_area->response.code); |
117 | if (ret != 0) { | |
7ad6a249 PO |
118 | CIO_MSG_EVENT(2, "chsc: ssd failed for 0.%x.%04x (rc=%04x)\n", |
119 | schid.ssid, schid.sch_no, | |
1da177e4 | 120 | ssd_area->response.code); |
34196f82 | 121 | goto out; |
1da177e4 | 122 | } |
7ad6a249 PO |
123 | if (!ssd_area->sch_valid) { |
124 | ret = -ENODEV; | |
34196f82 | 125 | goto out; |
1da177e4 | 126 | } |
7ad6a249 PO |
127 | /* Copy data */ |
128 | ret = 0; | |
129 | memset(ssd, 0, sizeof(struct chsc_ssd_info)); | |
b279a4f5 CH |
130 | if ((ssd_area->st != SUBCHANNEL_TYPE_IO) && |
131 | (ssd_area->st != SUBCHANNEL_TYPE_MSG)) | |
34196f82 | 132 | goto out; |
7ad6a249 PO |
133 | ssd->path_mask = ssd_area->path_mask; |
134 | ssd->fla_valid_mask = ssd_area->fla_valid_mask; | |
135 | for (i = 0; i < 8; i++) { | |
136 | mask = 0x80 >> i; | |
137 | if (ssd_area->path_mask & mask) { | |
138 | chp_id_init(&ssd->chpid[i]); | |
139 | ssd->chpid[i].id = ssd_area->chpid[i]; | |
1da177e4 | 140 | } |
7ad6a249 PO |
141 | if (ssd_area->fla_valid_mask & mask) |
142 | ssd->fla[i] = ssd_area->fla[i]; | |
1da177e4 | 143 | } |
34196f82 SO |
144 | out: |
145 | spin_unlock_irq(&chsc_page_lock); | |
1da177e4 LT |
146 | return ret; |
147 | } | |
148 | ||
da5b6cb1 SO |
149 | /** |
150 | * chsc_ssqd() - store subchannel QDIO data (SSQD) | |
151 | * @schid: id of the subchannel on which SSQD is performed | |
152 | * @ssqd: request and response block for SSQD | |
153 | * | |
154 | * Returns 0 on success. | |
155 | */ | |
156 | int chsc_ssqd(struct subchannel_id schid, struct chsc_ssqd_area *ssqd) | |
157 | { | |
158 | memset(ssqd, 0, sizeof(*ssqd)); | |
159 | ssqd->request.length = 0x0010; | |
160 | ssqd->request.code = 0x0024; | |
161 | ssqd->first_sch = schid.sch_no; | |
162 | ssqd->last_sch = schid.sch_no; | |
163 | ssqd->ssid = schid.ssid; | |
164 | ||
165 | if (chsc(ssqd)) | |
166 | return -EIO; | |
167 | ||
168 | return chsc_error_from_response(ssqd->response.code); | |
169 | } | |
170 | EXPORT_SYMBOL_GPL(chsc_ssqd); | |
171 | ||
ca4ba153 SO |
172 | /** |
173 | * chsc_sadc() - set adapter device controls (SADC) | |
174 | * @schid: id of the subchannel on which SADC is performed | |
175 | * @scssc: request and response block for SADC | |
176 | * @summary_indicator_addr: summary indicator address | |
177 | * @subchannel_indicator_addr: subchannel indicator address | |
178 | * | |
179 | * Returns 0 on success. | |
180 | */ | |
181 | int chsc_sadc(struct subchannel_id schid, struct chsc_scssc_area *scssc, | |
182 | u64 summary_indicator_addr, u64 subchannel_indicator_addr) | |
183 | { | |
184 | memset(scssc, 0, sizeof(*scssc)); | |
185 | scssc->request.length = 0x0fe0; | |
186 | scssc->request.code = 0x0021; | |
187 | scssc->operation_code = 0; | |
188 | ||
189 | scssc->summary_indicator_addr = summary_indicator_addr; | |
190 | scssc->subchannel_indicator_addr = subchannel_indicator_addr; | |
191 | ||
192 | scssc->ks = PAGE_DEFAULT_KEY >> 4; | |
193 | scssc->kc = PAGE_DEFAULT_KEY >> 4; | |
194 | scssc->isc = QDIO_AIRQ_ISC; | |
195 | scssc->schid = schid; | |
196 | ||
197 | /* enable the time delay disablement facility */ | |
198 | if (css_general_characteristics.aif_tdd) | |
199 | scssc->word_with_d_bit = 0x10000000; | |
200 | ||
201 | if (chsc(scssc)) | |
202 | return -EIO; | |
203 | ||
204 | return chsc_error_from_response(scssc->response.code); | |
205 | } | |
206 | EXPORT_SYMBOL_GPL(chsc_sadc); | |
207 | ||
e82a1567 | 208 | static int s390_subchannel_remove_chpid(struct subchannel *sch, void *data) |
1da177e4 | 209 | { |
2ec22984 | 210 | spin_lock_irq(sch->lock); |
c820de39 CH |
211 | if (sch->driver && sch->driver->chp_event) |
212 | if (sch->driver->chp_event(sch, data, CHP_OFFLINE) != 0) | |
1da177e4 | 213 | goto out_unreg; |
2ec22984 | 214 | spin_unlock_irq(sch->lock); |
1da177e4 | 215 | return 0; |
387b734f | 216 | |
1da177e4 | 217 | out_unreg: |
1da177e4 | 218 | sch->lpm = 0; |
387b734f | 219 | spin_unlock_irq(sch->lock); |
83b3370c | 220 | css_schedule_eval(sch->schid); |
1da177e4 LT |
221 | return 0; |
222 | } | |
223 | ||
e6b6e10a | 224 | void chsc_chp_offline(struct chp_id chpid) |
1da177e4 LT |
225 | { |
226 | char dbf_txt[15]; | |
99611f87 | 227 | struct chp_link link; |
1da177e4 | 228 | |
f86635fa | 229 | sprintf(dbf_txt, "chpr%x.%02x", chpid.cssid, chpid.id); |
1da177e4 LT |
230 | CIO_TRACE_EVENT(2, dbf_txt); |
231 | ||
e6b6e10a | 232 | if (chp_get_status(chpid) <= 0) |
1da177e4 | 233 | return; |
99611f87 CH |
234 | memset(&link, 0, sizeof(struct chp_link)); |
235 | link.chpid = chpid; | |
22806dc1 CH |
236 | /* Wait until previous actions have settled. */ |
237 | css_wait_for_slow_path(); | |
99611f87 | 238 | for_each_subchannel_staged(s390_subchannel_remove_chpid, NULL, &link); |
1da177e4 LT |
239 | } |
240 | ||
e82a1567 | 241 | static int __s390_process_res_acc(struct subchannel *sch, void *data) |
1da177e4 | 242 | { |
2ec22984 | 243 | spin_lock_irq(sch->lock); |
c820de39 CH |
244 | if (sch->driver && sch->driver->chp_event) |
245 | sch->driver->chp_event(sch, data, CHP_ONLINE); | |
2ec22984 | 246 | spin_unlock_irq(sch->lock); |
e82a1567 | 247 | |
dd9963f9 | 248 | return 0; |
f97a56fb CH |
249 | } |
250 | ||
99611f87 | 251 | static void s390_process_res_acc(struct chp_link *link) |
f97a56fb | 252 | { |
1da177e4 LT |
253 | char dbf_txt[15]; |
254 | ||
99611f87 CH |
255 | sprintf(dbf_txt, "accpr%x.%02x", link->chpid.cssid, |
256 | link->chpid.id); | |
1da177e4 | 257 | CIO_TRACE_EVENT( 2, dbf_txt); |
99611f87 CH |
258 | if (link->fla != 0) { |
259 | sprintf(dbf_txt, "fla%x", link->fla); | |
1da177e4 LT |
260 | CIO_TRACE_EVENT( 2, dbf_txt); |
261 | } | |
22806dc1 CH |
262 | /* Wait until previous actions have settled. */ |
263 | css_wait_for_slow_path(); | |
1da177e4 LT |
264 | /* |
265 | * I/O resources may have become accessible. | |
266 | * Scan through all subchannels that may be concerned and | |
267 | * do a validation on those. | |
268 | * The more information we have (info), the less scanning | |
269 | * will we have to do. | |
270 | */ | |
449666dd PO |
271 | for_each_subchannel_staged(__s390_process_res_acc, NULL, link); |
272 | css_schedule_reprobe(); | |
1da177e4 LT |
273 | } |
274 | ||
275 | static int | |
276 | __get_chpid_from_lir(void *data) | |
277 | { | |
278 | struct lir { | |
279 | u8 iq; | |
280 | u8 ic; | |
281 | u16 sci; | |
282 | /* incident-node descriptor */ | |
283 | u32 indesc[28]; | |
284 | /* attached-node descriptor */ | |
285 | u32 andesc[28]; | |
286 | /* incident-specific information */ | |
287 | u32 isinfo[28]; | |
0f008aa3 | 288 | } __attribute__ ((packed)) *lir; |
1da177e4 | 289 | |
12975aef | 290 | lir = data; |
1da177e4 LT |
291 | if (!(lir->iq&0x80)) |
292 | /* NULL link incident record */ | |
293 | return -EINVAL; | |
294 | if (!(lir->indesc[0]&0xc0000000)) | |
295 | /* node descriptor not valid */ | |
296 | return -EINVAL; | |
297 | if (!(lir->indesc[0]&0x10000000)) | |
298 | /* don't handle device-type nodes - FIXME */ | |
299 | return -EINVAL; | |
300 | /* Byte 3 contains the chpid. Could also be CTCA, but we don't care */ | |
301 | ||
302 | return (u16) (lir->indesc[0]&0x000000ff); | |
303 | } | |
304 | ||
cbc0dd1f JG |
305 | struct chsc_sei_nt0_area { |
306 | u8 flags; | |
307 | u8 vf; /* validity flags */ | |
308 | u8 rs; /* reporting source */ | |
309 | u8 cc; /* content code */ | |
310 | u16 fla; /* full link address */ | |
311 | u16 rsid; /* reporting source id */ | |
184357a5 PO |
312 | u32 reserved1; |
313 | u32 reserved2; | |
184357a5 | 314 | /* ccdf has to be big enough for a link-incident record */ |
cbc0dd1f JG |
315 | u8 ccdf[PAGE_SIZE - 24 - 16]; /* content-code dependent field */ |
316 | } __packed; | |
317 | ||
318 | struct chsc_sei_nt2_area { | |
319 | u8 flags; /* p and v bit */ | |
320 | u8 reserved1; | |
321 | u8 reserved2; | |
322 | u8 cc; /* content code */ | |
323 | u32 reserved3[13]; | |
324 | u8 ccdf[PAGE_SIZE - 24 - 56]; /* content-code dependent field */ | |
325 | } __packed; | |
326 | ||
509d97b6 | 327 | #define CHSC_SEI_NT0 (1ULL << 63) |
cbc0dd1f JG |
328 | #define CHSC_SEI_NT2 (1ULL << 61) |
329 | ||
330 | struct chsc_sei { | |
331 | struct chsc_header request; | |
332 | u32 reserved1; | |
333 | u64 ntsm; /* notification type mask */ | |
334 | struct chsc_header response; | |
509d97b6 SO |
335 | u32 :24; |
336 | u8 nt; | |
cbc0dd1f JG |
337 | union { |
338 | struct chsc_sei_nt0_area nt0_area; | |
339 | struct chsc_sei_nt2_area nt2_area; | |
340 | u8 nt_area[PAGE_SIZE - 24]; | |
341 | } u; | |
342 | } __packed; | |
343 | ||
344 | static void chsc_process_sei_link_incident(struct chsc_sei_nt0_area *sei_area) | |
184357a5 | 345 | { |
f86635fa PO |
346 | struct chp_id chpid; |
347 | int id; | |
184357a5 PO |
348 | |
349 | CIO_CRW_EVENT(4, "chsc: link incident (rs=%02x, rs_id=%04x)\n", | |
350 | sei_area->rs, sei_area->rsid); | |
351 | if (sei_area->rs != 4) | |
83b3370c | 352 | return; |
f86635fa PO |
353 | id = __get_chpid_from_lir(sei_area->ccdf); |
354 | if (id < 0) | |
184357a5 | 355 | CIO_CRW_EVENT(4, "chsc: link incident - invalid LIR\n"); |
f86635fa PO |
356 | else { |
357 | chp_id_init(&chpid); | |
358 | chpid.id = id; | |
e6b6e10a | 359 | chsc_chp_offline(chpid); |
f86635fa | 360 | } |
184357a5 PO |
361 | } |
362 | ||
cbc0dd1f | 363 | static void chsc_process_sei_res_acc(struct chsc_sei_nt0_area *sei_area) |
1da177e4 | 364 | { |
99611f87 | 365 | struct chp_link link; |
f86635fa | 366 | struct chp_id chpid; |
184357a5 | 367 | int status; |
184357a5 PO |
368 | |
369 | CIO_CRW_EVENT(4, "chsc: resource accessibility event (rs=%02x, " | |
370 | "rs_id=%04x)\n", sei_area->rs, sei_area->rsid); | |
371 | if (sei_area->rs != 4) | |
83b3370c | 372 | return; |
f86635fa PO |
373 | chp_id_init(&chpid); |
374 | chpid.id = sei_area->rsid; | |
184357a5 | 375 | /* allocate a new channel path structure, if needed */ |
e6b6e10a | 376 | status = chp_get_status(chpid); |
184357a5 | 377 | if (status < 0) |
e6b6e10a | 378 | chp_new(chpid); |
184357a5 | 379 | else if (!status) |
83b3370c | 380 | return; |
99611f87 CH |
381 | memset(&link, 0, sizeof(struct chp_link)); |
382 | link.chpid = chpid; | |
184357a5 | 383 | if ((sei_area->vf & 0xc0) != 0) { |
99611f87 | 384 | link.fla = sei_area->fla; |
184357a5 PO |
385 | if ((sei_area->vf & 0xc0) == 0xc0) |
386 | /* full link address */ | |
99611f87 | 387 | link.fla_mask = 0xffff; |
184357a5 PO |
388 | else |
389 | /* link address */ | |
99611f87 | 390 | link.fla_mask = 0xff00; |
184357a5 | 391 | } |
99611f87 | 392 | s390_process_res_acc(&link); |
184357a5 PO |
393 | } |
394 | ||
cbc0dd1f | 395 | static void chsc_process_sei_chp_avail(struct chsc_sei_nt0_area *sei_area) |
fca894ed SO |
396 | { |
397 | struct channel_path *chp; | |
398 | struct chp_id chpid; | |
399 | u8 *data; | |
400 | int num; | |
401 | ||
402 | CIO_CRW_EVENT(4, "chsc: channel path availability information\n"); | |
403 | if (sei_area->rs != 0) | |
404 | return; | |
405 | data = sei_area->ccdf; | |
406 | chp_id_init(&chpid); | |
407 | for (num = 0; num <= __MAX_CHPID; num++) { | |
408 | if (!chp_test_bit(data, num)) | |
409 | continue; | |
410 | chpid.id = num; | |
411 | ||
412 | CIO_CRW_EVENT(4, "Update information for channel path " | |
413 | "%x.%02x\n", chpid.cssid, chpid.id); | |
414 | chp = chpid_to_chp(chpid); | |
415 | if (!chp) { | |
416 | chp_new(chpid); | |
417 | continue; | |
418 | } | |
419 | mutex_lock(&chp->lock); | |
cce0eacc | 420 | chp_update_desc(chp); |
fca894ed SO |
421 | mutex_unlock(&chp->lock); |
422 | } | |
423 | } | |
424 | ||
e5854a58 PO |
425 | struct chp_config_data { |
426 | u8 map[32]; | |
427 | u8 op; | |
428 | u8 pc; | |
429 | }; | |
430 | ||
cbc0dd1f | 431 | static void chsc_process_sei_chp_config(struct chsc_sei_nt0_area *sei_area) |
e5854a58 PO |
432 | { |
433 | struct chp_config_data *data; | |
434 | struct chp_id chpid; | |
435 | int num; | |
e6d5a428 | 436 | char *events[3] = {"configure", "deconfigure", "cancel deconfigure"}; |
e5854a58 PO |
437 | |
438 | CIO_CRW_EVENT(4, "chsc: channel-path-configuration notification\n"); | |
439 | if (sei_area->rs != 0) | |
83b3370c | 440 | return; |
e5854a58 PO |
441 | data = (struct chp_config_data *) &(sei_area->ccdf); |
442 | chp_id_init(&chpid); | |
443 | for (num = 0; num <= __MAX_CHPID; num++) { | |
444 | if (!chp_test_bit(data->map, num)) | |
445 | continue; | |
446 | chpid.id = num; | |
e6d5a428 ME |
447 | pr_notice("Processing %s for channel path %x.%02x\n", |
448 | events[data->op], chpid.cssid, chpid.id); | |
e5854a58 PO |
449 | switch (data->op) { |
450 | case 0: | |
451 | chp_cfg_schedule(chpid, 1); | |
452 | break; | |
453 | case 1: | |
454 | chp_cfg_schedule(chpid, 0); | |
455 | break; | |
456 | case 2: | |
457 | chp_cfg_cancel_deconfigure(chpid); | |
458 | break; | |
459 | } | |
460 | } | |
e5854a58 PO |
461 | } |
462 | ||
cbc0dd1f | 463 | static void chsc_process_sei_scm_change(struct chsc_sei_nt0_area *sei_area) |
40ff4cc0 SO |
464 | { |
465 | int ret; | |
466 | ||
467 | CIO_CRW_EVENT(4, "chsc: scm change notification\n"); | |
468 | if (sei_area->rs != 7) | |
469 | return; | |
470 | ||
471 | ret = scm_update_information(); | |
472 | if (ret) | |
473 | CIO_CRW_EVENT(0, "chsc: updating change notification" | |
474 | " failed (rc=%d).\n", ret); | |
475 | } | |
476 | ||
aebfa669 SO |
477 | static void chsc_process_sei_scm_avail(struct chsc_sei_nt0_area *sei_area) |
478 | { | |
479 | int ret; | |
480 | ||
481 | CIO_CRW_EVENT(4, "chsc: scm available information\n"); | |
482 | if (sei_area->rs != 7) | |
483 | return; | |
484 | ||
485 | ret = scm_process_availability_information(); | |
486 | if (ret) | |
487 | CIO_CRW_EVENT(0, "chsc: process availability information" | |
488 | " failed (rc=%d).\n", ret); | |
489 | } | |
490 | ||
cbc0dd1f | 491 | static void chsc_process_sei_nt2(struct chsc_sei_nt2_area *sei_area) |
184357a5 | 492 | { |
cbc0dd1f JG |
493 | switch (sei_area->cc) { |
494 | case 1: | |
495 | zpci_event_error(sei_area->ccdf); | |
496 | break; | |
497 | case 2: | |
498 | zpci_event_availability(sei_area->ccdf); | |
499 | break; | |
500 | default: | |
9a17e972 | 501 | CIO_CRW_EVENT(2, "chsc: sei nt2 unhandled cc=%d\n", |
cbc0dd1f JG |
502 | sei_area->cc); |
503 | break; | |
83b3370c | 504 | } |
cbc0dd1f JG |
505 | } |
506 | ||
507 | static void chsc_process_sei_nt0(struct chsc_sei_nt0_area *sei_area) | |
508 | { | |
184357a5 | 509 | /* which kind of information was stored? */ |
184357a5 PO |
510 | switch (sei_area->cc) { |
511 | case 1: /* link incident*/ | |
83b3370c | 512 | chsc_process_sei_link_incident(sei_area); |
184357a5 | 513 | break; |
fca894ed | 514 | case 2: /* i/o resource accessibility */ |
83b3370c | 515 | chsc_process_sei_res_acc(sei_area); |
184357a5 | 516 | break; |
fca894ed SO |
517 | case 7: /* channel-path-availability information */ |
518 | chsc_process_sei_chp_avail(sei_area); | |
519 | break; | |
e5854a58 | 520 | case 8: /* channel-path-configuration notification */ |
83b3370c | 521 | chsc_process_sei_chp_config(sei_area); |
e5854a58 | 522 | break; |
40ff4cc0 SO |
523 | case 12: /* scm change notification */ |
524 | chsc_process_sei_scm_change(sei_area); | |
525 | break; | |
aebfa669 SO |
526 | case 14: /* scm available notification */ |
527 | chsc_process_sei_scm_avail(sei_area); | |
528 | break; | |
184357a5 | 529 | default: /* other stuff */ |
9a17e972 | 530 | CIO_CRW_EVENT(2, "chsc: sei nt0 unhandled cc=%d\n", |
184357a5 PO |
531 | sei_area->cc); |
532 | break; | |
533 | } | |
9a17e972 SO |
534 | |
535 | /* Check if we might have lost some information. */ | |
536 | if (sei_area->flags & 0x40) { | |
537 | CIO_CRW_EVENT(2, "chsc: event overflow\n"); | |
538 | css_schedule_eval_all(); | |
539 | } | |
184357a5 PO |
540 | } |
541 | ||
9a17e972 | 542 | static void chsc_process_event_information(struct chsc_sei *sei, u64 ntsm) |
cbc0dd1f | 543 | { |
06cd7a87 SO |
544 | static int ntsm_unsupported; |
545 | ||
546 | while (true) { | |
cbc0dd1f JG |
547 | memset(sei, 0, sizeof(*sei)); |
548 | sei->request.length = 0x0010; | |
549 | sei->request.code = 0x000e; | |
06cd7a87 SO |
550 | if (!ntsm_unsupported) |
551 | sei->ntsm = ntsm; | |
cbc0dd1f JG |
552 | |
553 | if (chsc(sei)) | |
554 | break; | |
555 | ||
9a17e972 | 556 | if (sei->response.code != 0x0001) { |
06cd7a87 SO |
557 | CIO_CRW_EVENT(2, "chsc: sei failed (rc=%04x, ntsm=%llx)\n", |
558 | sei->response.code, sei->ntsm); | |
559 | ||
560 | if (sei->response.code == 3 && sei->ntsm) { | |
561 | /* Fallback for old firmware. */ | |
562 | ntsm_unsupported = 1; | |
563 | continue; | |
564 | } | |
cbc0dd1f JG |
565 | break; |
566 | } | |
cbc0dd1f | 567 | |
9a17e972 SO |
568 | CIO_CRW_EVENT(2, "chsc: sei successful (nt=%d)\n", sei->nt); |
569 | switch (sei->nt) { | |
570 | case 0: | |
571 | chsc_process_sei_nt0(&sei->u.nt0_area); | |
572 | break; | |
573 | case 2: | |
574 | chsc_process_sei_nt2(&sei->u.nt2_area); | |
575 | break; | |
576 | default: | |
577 | CIO_CRW_EVENT(2, "chsc: unhandled nt: %d\n", sei->nt); | |
578 | break; | |
579 | } | |
06cd7a87 SO |
580 | |
581 | if (!(sei->u.nt0_area.flags & 0x80)) | |
582 | break; | |
583 | } | |
cbc0dd1f JG |
584 | } |
585 | ||
9a17e972 SO |
586 | /* |
587 | * Handle channel subsystem related CRWs. | |
588 | * Use store event information to find out what's going on. | |
589 | * | |
590 | * Note: Access to sei_page is serialized through machine check handler | |
591 | * thread, so no need for locking. | |
592 | */ | |
c1156189 | 593 | static void chsc_process_crw(struct crw *crw0, struct crw *crw1, int overflow) |
184357a5 | 594 | { |
9a17e972 | 595 | struct chsc_sei *sei = sei_page; |
1da177e4 | 596 | |
c1156189 CH |
597 | if (overflow) { |
598 | css_schedule_eval_all(); | |
599 | return; | |
600 | } | |
601 | CIO_CRW_EVENT(2, "CRW reports slct=%d, oflw=%d, " | |
602 | "chn=%d, rsc=%X, anc=%d, erc=%X, rsid=%X\n", | |
603 | crw0->slct, crw0->oflw, crw0->chn, crw0->rsc, crw0->anc, | |
604 | crw0->erc, crw0->rsid); | |
1da177e4 | 605 | |
c1156189 | 606 | CIO_TRACE_EVENT(2, "prcss"); |
9a17e972 | 607 | chsc_process_event_information(sei, CHSC_SEI_NT0 | CHSC_SEI_NT2); |
1da177e4 LT |
608 | } |
609 | ||
83b3370c | 610 | void chsc_chp_online(struct chp_id chpid) |
f97a56fb | 611 | { |
1da177e4 | 612 | char dbf_txt[15]; |
99611f87 | 613 | struct chp_link link; |
1da177e4 | 614 | |
f86635fa | 615 | sprintf(dbf_txt, "cadd%x.%02x", chpid.cssid, chpid.id); |
1da177e4 LT |
616 | CIO_TRACE_EVENT(2, dbf_txt); |
617 | ||
22806dc1 | 618 | if (chp_get_status(chpid) != 0) { |
99611f87 CH |
619 | memset(&link, 0, sizeof(struct chp_link)); |
620 | link.chpid = chpid; | |
22806dc1 CH |
621 | /* Wait until previous actions have settled. */ |
622 | css_wait_for_slow_path(); | |
c820de39 | 623 | for_each_subchannel_staged(__s390_process_res_acc, NULL, |
99611f87 | 624 | &link); |
9955e8d1 | 625 | css_schedule_reprobe(); |
22806dc1 | 626 | } |
1da177e4 LT |
627 | } |
628 | ||
f86635fa PO |
629 | static void __s390_subchannel_vary_chpid(struct subchannel *sch, |
630 | struct chp_id chpid, int on) | |
1da177e4 | 631 | { |
1da177e4 | 632 | unsigned long flags; |
99611f87 | 633 | struct chp_link link; |
1da177e4 | 634 | |
99611f87 CH |
635 | memset(&link, 0, sizeof(struct chp_link)); |
636 | link.chpid = chpid; | |
2ec22984 | 637 | spin_lock_irqsave(sch->lock, flags); |
c820de39 | 638 | if (sch->driver && sch->driver->chp_event) |
99611f87 | 639 | sch->driver->chp_event(sch, &link, |
c820de39 | 640 | on ? CHP_VARY_ON : CHP_VARY_OFF); |
2ec22984 | 641 | spin_unlock_irqrestore(sch->lock, flags); |
1da177e4 LT |
642 | } |
643 | ||
e82a1567 | 644 | static int s390_subchannel_vary_chpid_off(struct subchannel *sch, void *data) |
1da177e4 | 645 | { |
e82a1567 | 646 | struct chp_id *chpid = data; |
1da177e4 LT |
647 | |
648 | __s390_subchannel_vary_chpid(sch, *chpid, 0); | |
649 | return 0; | |
650 | } | |
651 | ||
e82a1567 | 652 | static int s390_subchannel_vary_chpid_on(struct subchannel *sch, void *data) |
1da177e4 | 653 | { |
e82a1567 | 654 | struct chp_id *chpid = data; |
1da177e4 LT |
655 | |
656 | __s390_subchannel_vary_chpid(sch, *chpid, 1); | |
657 | return 0; | |
658 | } | |
659 | ||
e6b6e10a PO |
660 | /** |
661 | * chsc_chp_vary - propagate channel-path vary operation to subchannels | |
662 | * @chpid: channl-path ID | |
663 | * @on: non-zero for vary online, zero for vary offline | |
1da177e4 | 664 | */ |
e6b6e10a | 665 | int chsc_chp_vary(struct chp_id chpid, int on) |
1da177e4 | 666 | { |
c38a90a3 | 667 | struct channel_path *chp = chpid_to_chp(chpid); |
99611f87 | 668 | |
22806dc1 CH |
669 | /* Wait until previous actions have settled. */ |
670 | css_wait_for_slow_path(); | |
1da177e4 LT |
671 | /* |
672 | * Redo PathVerification on the devices the chpid connects to | |
673 | */ | |
c38a90a3 | 674 | if (on) { |
cce0eacc PO |
675 | /* Try to update the channel path description. */ |
676 | chp_update_desc(chp); | |
e82a1567 | 677 | for_each_subchannel_staged(s390_subchannel_vary_chpid_on, |
449666dd PO |
678 | NULL, &chpid); |
679 | css_schedule_reprobe(); | |
c38a90a3 | 680 | } else |
e82a1567 | 681 | for_each_subchannel_staged(s390_subchannel_vary_chpid_off, |
3b484ec6 | 682 | NULL, &chpid); |
e82a1567 | 683 | |
1da177e4 LT |
684 | return 0; |
685 | } | |
686 | ||
495a5b45 CH |
687 | static void |
688 | chsc_remove_cmg_attr(struct channel_subsystem *css) | |
689 | { | |
690 | int i; | |
691 | ||
692 | for (i = 0; i <= __MAX_CHPID; i++) { | |
693 | if (!css->chps[i]) | |
694 | continue; | |
e6b6e10a | 695 | chp_remove_cmg_attr(css->chps[i]); |
495a5b45 CH |
696 | } |
697 | } | |
698 | ||
699 | static int | |
700 | chsc_add_cmg_attr(struct channel_subsystem *css) | |
701 | { | |
702 | int i, ret; | |
703 | ||
704 | ret = 0; | |
705 | for (i = 0; i <= __MAX_CHPID; i++) { | |
706 | if (!css->chps[i]) | |
707 | continue; | |
e6b6e10a | 708 | ret = chp_add_cmg_attr(css->chps[i]); |
495a5b45 CH |
709 | if (ret) |
710 | goto cleanup; | |
711 | } | |
712 | return ret; | |
713 | cleanup: | |
714 | for (--i; i >= 0; i--) { | |
715 | if (!css->chps[i]) | |
716 | continue; | |
e6b6e10a | 717 | chp_remove_cmg_attr(css->chps[i]); |
495a5b45 CH |
718 | } |
719 | return ret; | |
720 | } | |
721 | ||
34196f82 | 722 | int __chsc_do_secm(struct channel_subsystem *css, int enable) |
495a5b45 CH |
723 | { |
724 | struct { | |
725 | struct chsc_header request; | |
726 | u32 operation_code : 2; | |
727 | u32 : 30; | |
728 | u32 key : 4; | |
729 | u32 : 28; | |
730 | u32 zeroes1; | |
731 | u32 cub_addr1; | |
732 | u32 zeroes2; | |
733 | u32 cub_addr2; | |
734 | u32 reserved[13]; | |
735 | struct chsc_header response; | |
736 | u32 status : 8; | |
737 | u32 : 4; | |
738 | u32 fmt : 4; | |
739 | u32 : 16; | |
0f008aa3 | 740 | } __attribute__ ((packed)) *secm_area; |
495a5b45 CH |
741 | int ret, ccode; |
742 | ||
34196f82 SO |
743 | spin_lock_irq(&chsc_page_lock); |
744 | memset(chsc_page, 0, PAGE_SIZE); | |
745 | secm_area = chsc_page; | |
495a5b45 CH |
746 | secm_area->request.length = 0x0050; |
747 | secm_area->request.code = 0x0016; | |
748 | ||
d1bf8590 | 749 | secm_area->key = PAGE_DEFAULT_KEY >> 4; |
495a5b45 CH |
750 | secm_area->cub_addr1 = (u64)(unsigned long)css->cub_addr1; |
751 | secm_area->cub_addr2 = (u64)(unsigned long)css->cub_addr2; | |
752 | ||
753 | secm_area->operation_code = enable ? 0 : 1; | |
754 | ||
755 | ccode = chsc(secm_area); | |
34196f82 SO |
756 | if (ccode > 0) { |
757 | ret = (ccode == 3) ? -ENODEV : -EBUSY; | |
758 | goto out; | |
759 | } | |
495a5b45 CH |
760 | |
761 | switch (secm_area->response.code) { | |
b9c9a21a CH |
762 | case 0x0102: |
763 | case 0x0103: | |
495a5b45 | 764 | ret = -EINVAL; |
17e7d87d | 765 | break; |
495a5b45 | 766 | default: |
b9c9a21a | 767 | ret = chsc_error_from_response(secm_area->response.code); |
495a5b45 | 768 | } |
b9c9a21a CH |
769 | if (ret != 0) |
770 | CIO_CRW_EVENT(2, "chsc: secm failed (rc=%04x)\n", | |
771 | secm_area->response.code); | |
34196f82 SO |
772 | out: |
773 | spin_unlock_irq(&chsc_page_lock); | |
495a5b45 CH |
774 | return ret; |
775 | } | |
776 | ||
777 | int | |
778 | chsc_secm(struct channel_subsystem *css, int enable) | |
779 | { | |
495a5b45 CH |
780 | int ret; |
781 | ||
495a5b45 CH |
782 | if (enable && !css->cm_enabled) { |
783 | css->cub_addr1 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
784 | css->cub_addr2 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
785 | if (!css->cub_addr1 || !css->cub_addr2) { | |
786 | free_page((unsigned long)css->cub_addr1); | |
787 | free_page((unsigned long)css->cub_addr2); | |
495a5b45 CH |
788 | return -ENOMEM; |
789 | } | |
790 | } | |
34196f82 | 791 | ret = __chsc_do_secm(css, enable); |
495a5b45 CH |
792 | if (!ret) { |
793 | css->cm_enabled = enable; | |
794 | if (css->cm_enabled) { | |
795 | ret = chsc_add_cmg_attr(css); | |
796 | if (ret) { | |
34196f82 | 797 | __chsc_do_secm(css, 0); |
495a5b45 CH |
798 | css->cm_enabled = 0; |
799 | } | |
800 | } else | |
801 | chsc_remove_cmg_attr(css); | |
802 | } | |
8c4941c5 | 803 | if (!css->cm_enabled) { |
495a5b45 CH |
804 | free_page((unsigned long)css->cub_addr1); |
805 | free_page((unsigned long)css->cub_addr2); | |
806 | } | |
495a5b45 CH |
807 | return ret; |
808 | } | |
809 | ||
9d92a7e1 | 810 | int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt, |
906c9768 | 811 | int c, int m, void *page) |
1da177e4 | 812 | { |
906c9768 | 813 | struct chsc_scpd *scpd_area; |
1da177e4 LT |
814 | int ccode, ret; |
815 | ||
9d92a7e1 CH |
816 | if ((rfmt == 1) && !css_general_characteristics.fcs) |
817 | return -EINVAL; | |
818 | if ((rfmt == 2) && !css_general_characteristics.cib) | |
819 | return -EINVAL; | |
1da177e4 | 820 | |
906c9768 SO |
821 | memset(page, 0, PAGE_SIZE); |
822 | scpd_area = page; | |
495a5b45 CH |
823 | scpd_area->request.length = 0x0010; |
824 | scpd_area->request.code = 0x0002; | |
9d92a7e1 | 825 | scpd_area->cssid = chpid.cssid; |
f86635fa PO |
826 | scpd_area->first_chpid = chpid.id; |
827 | scpd_area->last_chpid = chpid.id; | |
9d92a7e1 CH |
828 | scpd_area->m = m; |
829 | scpd_area->c = c; | |
830 | scpd_area->fmt = fmt; | |
831 | scpd_area->rfmt = rfmt; | |
1da177e4 LT |
832 | |
833 | ccode = chsc(scpd_area); | |
906c9768 SO |
834 | if (ccode > 0) |
835 | return (ccode == 3) ? -ENODEV : -EBUSY; | |
1da177e4 | 836 | |
b9c9a21a | 837 | ret = chsc_error_from_response(scpd_area->response.code); |
906c9768 | 838 | if (ret) |
b9c9a21a | 839 | CIO_CRW_EVENT(2, "chsc: scpd failed (rc=%04x)\n", |
1da177e4 | 840 | scpd_area->response.code); |
1da177e4 LT |
841 | return ret; |
842 | } | |
9d92a7e1 CH |
843 | EXPORT_SYMBOL_GPL(chsc_determine_channel_path_desc); |
844 | ||
845 | int chsc_determine_base_channel_path_desc(struct chp_id chpid, | |
846 | struct channel_path_desc *desc) | |
847 | { | |
848 | struct chsc_response_struct *chsc_resp; | |
906c9768 | 849 | struct chsc_scpd *scpd_area; |
62da177a | 850 | unsigned long flags; |
9d92a7e1 CH |
851 | int ret; |
852 | ||
62da177a | 853 | spin_lock_irqsave(&chsc_page_lock, flags); |
906c9768 SO |
854 | scpd_area = chsc_page; |
855 | ret = chsc_determine_channel_path_desc(chpid, 0, 0, 0, 0, scpd_area); | |
9d92a7e1 | 856 | if (ret) |
906c9768 SO |
857 | goto out; |
858 | chsc_resp = (void *)&scpd_area->response; | |
878c4956 | 859 | memcpy(desc, &chsc_resp->data, sizeof(*desc)); |
906c9768 | 860 | out: |
62da177a | 861 | spin_unlock_irqrestore(&chsc_page_lock, flags); |
9d92a7e1 CH |
862 | return ret; |
863 | } | |
1da177e4 | 864 | |
ce322ccd SO |
865 | int chsc_determine_fmt1_channel_path_desc(struct chp_id chpid, |
866 | struct channel_path_desc_fmt1 *desc) | |
867 | { | |
868 | struct chsc_response_struct *chsc_resp; | |
869 | struct chsc_scpd *scpd_area; | |
cce0eacc | 870 | unsigned long flags; |
ce322ccd SO |
871 | int ret; |
872 | ||
cce0eacc | 873 | spin_lock_irqsave(&chsc_page_lock, flags); |
ce322ccd SO |
874 | scpd_area = chsc_page; |
875 | ret = chsc_determine_channel_path_desc(chpid, 0, 0, 1, 0, scpd_area); | |
876 | if (ret) | |
877 | goto out; | |
878 | chsc_resp = (void *)&scpd_area->response; | |
879 | memcpy(desc, &chsc_resp->data, sizeof(*desc)); | |
880 | out: | |
cce0eacc | 881 | spin_unlock_irqrestore(&chsc_page_lock, flags); |
ce322ccd SO |
882 | return ret; |
883 | } | |
884 | ||
495a5b45 CH |
885 | static void |
886 | chsc_initialize_cmg_chars(struct channel_path *chp, u8 cmcv, | |
887 | struct cmg_chars *chars) | |
888 | { | |
34196f82 SO |
889 | struct cmg_chars *cmg_chars; |
890 | int i, mask; | |
891 | ||
892 | cmg_chars = chp->cmg_chars; | |
893 | for (i = 0; i < NR_MEASUREMENT_CHARS; i++) { | |
894 | mask = 0x80 >> (i + 3); | |
895 | if (cmcv & mask) | |
896 | cmg_chars->values[i] = chars->values[i]; | |
897 | else | |
898 | cmg_chars->values[i] = 0; | |
495a5b45 CH |
899 | } |
900 | } | |
901 | ||
e6b6e10a | 902 | int chsc_get_channel_measurement_chars(struct channel_path *chp) |
495a5b45 | 903 | { |
34196f82 | 904 | struct cmg_chars *cmg_chars; |
495a5b45 CH |
905 | int ccode, ret; |
906 | ||
907 | struct { | |
908 | struct chsc_header request; | |
909 | u32 : 24; | |
910 | u32 first_chpid : 8; | |
911 | u32 : 24; | |
912 | u32 last_chpid : 8; | |
913 | u32 zeroes1; | |
914 | struct chsc_header response; | |
915 | u32 zeroes2; | |
916 | u32 not_valid : 1; | |
917 | u32 shared : 1; | |
918 | u32 : 22; | |
919 | u32 chpid : 8; | |
920 | u32 cmcv : 5; | |
921 | u32 : 11; | |
922 | u32 cmgq : 8; | |
923 | u32 cmg : 8; | |
924 | u32 zeroes3; | |
925 | u32 data[NR_MEASUREMENT_CHARS]; | |
0f008aa3 | 926 | } __attribute__ ((packed)) *scmc_area; |
495a5b45 | 927 | |
34196f82 SO |
928 | chp->cmg_chars = NULL; |
929 | cmg_chars = kmalloc(sizeof(*cmg_chars), GFP_KERNEL); | |
930 | if (!cmg_chars) | |
495a5b45 CH |
931 | return -ENOMEM; |
932 | ||
34196f82 SO |
933 | spin_lock_irq(&chsc_page_lock); |
934 | memset(chsc_page, 0, PAGE_SIZE); | |
935 | scmc_area = chsc_page; | |
495a5b45 CH |
936 | scmc_area->request.length = 0x0010; |
937 | scmc_area->request.code = 0x0022; | |
f86635fa PO |
938 | scmc_area->first_chpid = chp->chpid.id; |
939 | scmc_area->last_chpid = chp->chpid.id; | |
495a5b45 CH |
940 | |
941 | ccode = chsc(scmc_area); | |
942 | if (ccode > 0) { | |
943 | ret = (ccode == 3) ? -ENODEV : -EBUSY; | |
944 | goto out; | |
945 | } | |
946 | ||
b9c9a21a | 947 | ret = chsc_error_from_response(scmc_area->response.code); |
34196f82 | 948 | if (ret) { |
b9c9a21a | 949 | CIO_CRW_EVENT(2, "chsc: scmc failed (rc=%04x)\n", |
495a5b45 | 950 | scmc_area->response.code); |
34196f82 SO |
951 | goto out; |
952 | } | |
953 | if (scmc_area->not_valid) { | |
954 | chp->cmg = -1; | |
955 | chp->shared = -1; | |
956 | goto out; | |
957 | } | |
958 | chp->cmg = scmc_area->cmg; | |
959 | chp->shared = scmc_area->shared; | |
960 | if (chp->cmg != 2 && chp->cmg != 3) { | |
961 | /* No cmg-dependent data. */ | |
962 | goto out; | |
495a5b45 | 963 | } |
34196f82 SO |
964 | chp->cmg_chars = cmg_chars; |
965 | chsc_initialize_cmg_chars(chp, scmc_area->cmcv, | |
966 | (struct cmg_chars *) &scmc_area->data); | |
495a5b45 | 967 | out: |
34196f82 SO |
968 | spin_unlock_irq(&chsc_page_lock); |
969 | if (!chp->cmg_chars) | |
970 | kfree(cmg_chars); | |
971 | ||
495a5b45 CH |
972 | return ret; |
973 | } | |
974 | ||
34aec07c | 975 | int __init chsc_init(void) |
1da177e4 | 976 | { |
c1156189 CH |
977 | int ret; |
978 | ||
1da177e4 | 979 | sei_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
34196f82 SO |
980 | chsc_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
981 | if (!sei_page || !chsc_page) { | |
982 | ret = -ENOMEM; | |
983 | goto out_err; | |
c1156189 | 984 | } |
f5daba1d | 985 | ret = crw_register_handler(CRW_RSC_CSS, chsc_process_crw); |
c1156189 | 986 | if (ret) |
34196f82 SO |
987 | goto out_err; |
988 | return ret; | |
989 | out_err: | |
990 | free_page((unsigned long)chsc_page); | |
991 | free_page((unsigned long)sei_page); | |
c1156189 | 992 | return ret; |
1da177e4 LT |
993 | } |
994 | ||
34aec07c | 995 | void __init chsc_init_cleanup(void) |
4434a38c | 996 | { |
f5daba1d | 997 | crw_unregister_handler(CRW_RSC_CSS); |
34196f82 | 998 | free_page((unsigned long)chsc_page); |
34aec07c | 999 | free_page((unsigned long)sei_page); |
4434a38c CH |
1000 | } |
1001 | ||
818c272b | 1002 | int chsc_enable_facility(int operation_code) |
fb6958a5 | 1003 | { |
34196f82 | 1004 | unsigned long flags; |
fb6958a5 | 1005 | int ret; |
34196f82 | 1006 | struct { |
fb6958a5 CH |
1007 | struct chsc_header request; |
1008 | u8 reserved1:4; | |
1009 | u8 format:4; | |
1010 | u8 reserved2; | |
1011 | u16 operation_code; | |
1012 | u32 reserved3; | |
1013 | u32 reserved4; | |
1014 | u32 operation_data_area[252]; | |
1015 | struct chsc_header response; | |
1016 | u32 reserved5:4; | |
1017 | u32 format2:4; | |
1018 | u32 reserved6:24; | |
34196f82 | 1019 | } __attribute__ ((packed)) *sda_area; |
fb6958a5 | 1020 | |
34196f82 SO |
1021 | spin_lock_irqsave(&chsc_page_lock, flags); |
1022 | memset(chsc_page, 0, PAGE_SIZE); | |
1023 | sda_area = chsc_page; | |
1024 | sda_area->request.length = 0x0400; | |
1025 | sda_area->request.code = 0x0031; | |
1026 | sda_area->operation_code = operation_code; | |
fb6958a5 | 1027 | |
34196f82 | 1028 | ret = chsc(sda_area); |
fb6958a5 CH |
1029 | if (ret > 0) { |
1030 | ret = (ret == 3) ? -ENODEV : -EBUSY; | |
1031 | goto out; | |
1032 | } | |
b9c9a21a | 1033 | |
34196f82 | 1034 | switch (sda_area->response.code) { |
b9c9a21a | 1035 | case 0x0101: |
fb6958a5 CH |
1036 | ret = -EOPNOTSUPP; |
1037 | break; | |
b9c9a21a | 1038 | default: |
34196f82 | 1039 | ret = chsc_error_from_response(sda_area->response.code); |
fb6958a5 | 1040 | } |
b9c9a21a CH |
1041 | if (ret != 0) |
1042 | CIO_CRW_EVENT(2, "chsc: sda (oc=%x) failed (rc=%04x)\n", | |
34196f82 SO |
1043 | operation_code, sda_area->response.code); |
1044 | out: | |
1045 | spin_unlock_irqrestore(&chsc_page_lock, flags); | |
fb6958a5 CH |
1046 | return ret; |
1047 | } | |
1048 | ||
1da177e4 LT |
1049 | struct css_general_char css_general_characteristics; |
1050 | struct css_chsc_char css_chsc_characteristics; | |
1051 | ||
1052 | int __init | |
1053 | chsc_determine_css_characteristics(void) | |
1054 | { | |
1055 | int result; | |
1056 | struct { | |
1057 | struct chsc_header request; | |
1058 | u32 reserved1; | |
1059 | u32 reserved2; | |
1060 | u32 reserved3; | |
1061 | struct chsc_header response; | |
1062 | u32 reserved4; | |
1063 | u32 general_char[510]; | |
34aec07c | 1064 | u32 chsc_char[508]; |
0f008aa3 | 1065 | } __attribute__ ((packed)) *scsc_area; |
1da177e4 | 1066 | |
34196f82 SO |
1067 | spin_lock_irq(&chsc_page_lock); |
1068 | memset(chsc_page, 0, PAGE_SIZE); | |
1069 | scsc_area = chsc_page; | |
495a5b45 CH |
1070 | scsc_area->request.length = 0x0010; |
1071 | scsc_area->request.code = 0x0010; | |
1da177e4 LT |
1072 | |
1073 | result = chsc(scsc_area); | |
1074 | if (result) { | |
b9c9a21a | 1075 | result = (result == 3) ? -ENODEV : -EBUSY; |
1da177e4 LT |
1076 | goto exit; |
1077 | } | |
1078 | ||
b9c9a21a CH |
1079 | result = chsc_error_from_response(scsc_area->response.code); |
1080 | if (result == 0) { | |
1081 | memcpy(&css_general_characteristics, scsc_area->general_char, | |
1082 | sizeof(css_general_characteristics)); | |
1083 | memcpy(&css_chsc_characteristics, scsc_area->chsc_char, | |
1084 | sizeof(css_chsc_characteristics)); | |
1085 | } else | |
1086 | CIO_CRW_EVENT(2, "chsc: scsc failed (rc=%04x)\n", | |
1087 | scsc_area->response.code); | |
1da177e4 | 1088 | exit: |
34196f82 | 1089 | spin_unlock_irq(&chsc_page_lock); |
1da177e4 LT |
1090 | return result; |
1091 | } | |
1092 | ||
1093 | EXPORT_SYMBOL_GPL(css_general_characteristics); | |
1094 | EXPORT_SYMBOL_GPL(css_chsc_characteristics); | |
d2fec595 MS |
1095 | |
1096 | int chsc_sstpc(void *page, unsigned int op, u16 ctrl) | |
1097 | { | |
1098 | struct { | |
1099 | struct chsc_header request; | |
1100 | unsigned int rsvd0; | |
1101 | unsigned int op : 8; | |
1102 | unsigned int rsvd1 : 8; | |
1103 | unsigned int ctrl : 16; | |
1104 | unsigned int rsvd2[5]; | |
1105 | struct chsc_header response; | |
1106 | unsigned int rsvd3[7]; | |
1107 | } __attribute__ ((packed)) *rr; | |
1108 | int rc; | |
1109 | ||
1110 | memset(page, 0, PAGE_SIZE); | |
1111 | rr = page; | |
1112 | rr->request.length = 0x0020; | |
1113 | rr->request.code = 0x0033; | |
1114 | rr->op = op; | |
1115 | rr->ctrl = ctrl; | |
1116 | rc = chsc(rr); | |
1117 | if (rc) | |
1118 | return -EIO; | |
1119 | rc = (rr->response.code == 0x0001) ? 0 : -EIO; | |
1120 | return rc; | |
1121 | } | |
1122 | ||
1123 | int chsc_sstpi(void *page, void *result, size_t size) | |
1124 | { | |
1125 | struct { | |
1126 | struct chsc_header request; | |
1127 | unsigned int rsvd0[3]; | |
1128 | struct chsc_header response; | |
1129 | char data[size]; | |
1130 | } __attribute__ ((packed)) *rr; | |
1131 | int rc; | |
1132 | ||
1133 | memset(page, 0, PAGE_SIZE); | |
1134 | rr = page; | |
1135 | rr->request.length = 0x0010; | |
1136 | rr->request.code = 0x0038; | |
1137 | rc = chsc(rr); | |
1138 | if (rc) | |
1139 | return -EIO; | |
1140 | memcpy(result, &rr->data, size); | |
1141 | return (rr->response.code == 0x0001) ? 0 : -EIO; | |
1142 | } | |
1143 | ||
fd0457a6 ME |
1144 | int chsc_siosl(struct subchannel_id schid) |
1145 | { | |
34196f82 SO |
1146 | struct { |
1147 | struct chsc_header request; | |
1148 | u32 word1; | |
1149 | struct subchannel_id sid; | |
1150 | u32 word3; | |
1151 | struct chsc_header response; | |
1152 | u32 word[11]; | |
1153 | } __attribute__ ((packed)) *siosl_area; | |
fd0457a6 ME |
1154 | unsigned long flags; |
1155 | int ccode; | |
1156 | int rc; | |
1157 | ||
34196f82 SO |
1158 | spin_lock_irqsave(&chsc_page_lock, flags); |
1159 | memset(chsc_page, 0, PAGE_SIZE); | |
1160 | siosl_area = chsc_page; | |
1161 | siosl_area->request.length = 0x0010; | |
1162 | siosl_area->request.code = 0x0046; | |
1163 | siosl_area->word1 = 0x80000000; | |
1164 | siosl_area->sid = schid; | |
fd0457a6 | 1165 | |
34196f82 | 1166 | ccode = chsc(siosl_area); |
fd0457a6 ME |
1167 | if (ccode > 0) { |
1168 | if (ccode == 3) | |
1169 | rc = -ENODEV; | |
1170 | else | |
1171 | rc = -EBUSY; | |
1172 | CIO_MSG_EVENT(2, "chsc: chsc failed for 0.%x.%04x (ccode=%d)\n", | |
1173 | schid.ssid, schid.sch_no, ccode); | |
1174 | goto out; | |
1175 | } | |
34196f82 | 1176 | rc = chsc_error_from_response(siosl_area->response.code); |
fd0457a6 ME |
1177 | if (rc) |
1178 | CIO_MSG_EVENT(2, "chsc: siosl failed for 0.%x.%04x (rc=%04x)\n", | |
1179 | schid.ssid, schid.sch_no, | |
34196f82 | 1180 | siosl_area->response.code); |
fd0457a6 ME |
1181 | else |
1182 | CIO_MSG_EVENT(4, "chsc: siosl succeeded for 0.%x.%04x\n", | |
1183 | schid.ssid, schid.sch_no); | |
1184 | out: | |
34196f82 | 1185 | spin_unlock_irqrestore(&chsc_page_lock, flags); |
fd0457a6 ME |
1186 | return rc; |
1187 | } | |
1188 | EXPORT_SYMBOL_GPL(chsc_siosl); | |
184b08af SO |
1189 | |
1190 | /** | |
1191 | * chsc_scm_info() - store SCM information (SSI) | |
1192 | * @scm_area: request and response block for SSI | |
1193 | * @token: continuation token | |
1194 | * | |
1195 | * Returns 0 on success. | |
1196 | */ | |
1197 | int chsc_scm_info(struct chsc_scm_info *scm_area, u64 token) | |
1198 | { | |
1199 | int ccode, ret; | |
1200 | ||
1201 | memset(scm_area, 0, sizeof(*scm_area)); | |
1202 | scm_area->request.length = 0x0020; | |
1203 | scm_area->request.code = 0x004C; | |
1204 | scm_area->reqtok = token; | |
1205 | ||
1206 | ccode = chsc(scm_area); | |
1207 | if (ccode > 0) { | |
1208 | ret = (ccode == 3) ? -ENODEV : -EBUSY; | |
1209 | goto out; | |
1210 | } | |
1211 | ret = chsc_error_from_response(scm_area->response.code); | |
1212 | if (ret != 0) | |
1213 | CIO_MSG_EVENT(2, "chsc: scm info failed (rc=%04x)\n", | |
1214 | scm_area->response.code); | |
1215 | out: | |
1216 | return ret; | |
1217 | } | |
1218 | EXPORT_SYMBOL_GPL(chsc_scm_info); | |
1c59a861 EC |
1219 | |
1220 | /** | |
1221 | * chsc_pnso_brinfo() - Perform Network-Subchannel Operation, Bridge Info. | |
1222 | * @schid: id of the subchannel on which PNSO is performed | |
1223 | * @brinfo_area: request and response block for the operation | |
1224 | * @resume_token: resume token for multiblock response | |
1225 | * @cnc: Boolean change-notification control | |
1226 | * | |
1227 | * brinfo_area must be allocated by the caller with get_zeroed_page(GFP_KERNEL) | |
1228 | * | |
1229 | * Returns 0 on success. | |
1230 | */ | |
1231 | int chsc_pnso_brinfo(struct subchannel_id schid, | |
1232 | struct chsc_pnso_area *brinfo_area, | |
1233 | struct chsc_brinfo_resume_token resume_token, | |
1234 | int cnc) | |
1235 | { | |
1236 | memset(brinfo_area, 0, sizeof(*brinfo_area)); | |
1237 | brinfo_area->request.length = 0x0030; | |
1238 | brinfo_area->request.code = 0x003d; /* network-subchannel operation */ | |
1239 | brinfo_area->m = schid.m; | |
1240 | brinfo_area->ssid = schid.ssid; | |
1241 | brinfo_area->sch = schid.sch_no; | |
1242 | brinfo_area->cssid = schid.cssid; | |
1243 | brinfo_area->oc = 0; /* Store-network-bridging-information list */ | |
1244 | brinfo_area->resume_token = resume_token; | |
1245 | brinfo_area->n = (cnc != 0); | |
1246 | if (chsc(brinfo_area)) | |
1247 | return -EIO; | |
1248 | return chsc_error_from_response(brinfo_area->response.code); | |
1249 | } | |
1250 | EXPORT_SYMBOL_GPL(chsc_pnso_brinfo); |