Commit | Line | Data |
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724117b7 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 | 2 | /* |
1da177e4 | 3 | * S/390 common I/O routines -- channel subsystem call |
1da177e4 | 4 | * |
cbc0dd1f | 5 | * Copyright IBM Corp. 1999,2012 |
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 | ||
e6d5a428 ME |
11 | #define KMSG_COMPONENT "cio" |
12 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
13 | ||
1da177e4 | 14 | #include <linux/module.h> |
1da177e4 LT |
15 | #include <linux/slab.h> |
16 | #include <linux/init.h> | |
17 | #include <linux/device.h> | |
9f3d6d7a | 18 | #include <linux/mutex.h> |
cbc0dd1f | 19 | #include <linux/pci.h> |
1da177e4 LT |
20 | |
21 | #include <asm/cio.h> | |
e5854a58 | 22 | #include <asm/chpid.h> |
9d92a7e1 | 23 | #include <asm/chsc.h> |
f5daba1d | 24 | #include <asm/crw.h> |
ca4ba153 | 25 | #include <asm/isc.h> |
1d2334cb | 26 | #include <asm/ebcdic.h> |
0d9c038f | 27 | #include <asm/ap.h> |
1da177e4 LT |
28 | |
29 | #include "css.h" | |
30 | #include "cio.h" | |
31 | #include "cio_debug.h" | |
32 | #include "ioasm.h" | |
e6b6e10a | 33 | #include "chp.h" |
1da177e4 LT |
34 | #include "chsc.h" |
35 | ||
1da177e4 | 36 | static void *sei_page; |
34196f82 SO |
37 | static void *chsc_page; |
38 | static DEFINE_SPINLOCK(chsc_page_lock); | |
1da177e4 | 39 | |
32ef9388 VV |
40 | #define SEI_VF_FLA 0xc0 /* VF flag for Full Link Address */ |
41 | #define SEI_RS_CHPID 0x4 /* 4 in RS field indicates CHPID */ | |
42 | ||
dae39843 CH |
43 | /** |
44 | * chsc_error_from_response() - convert a chsc response to an error | |
45 | * @response: chsc response code | |
46 | * | |
47 | * Returns an appropriate Linux error code for @response. | |
48 | */ | |
49 | int chsc_error_from_response(int response) | |
b9c9a21a CH |
50 | { |
51 | switch (response) { | |
52 | case 0x0001: | |
53 | return 0; | |
54 | case 0x0002: | |
55 | case 0x0003: | |
56 | case 0x0006: | |
57 | case 0x0007: | |
58 | case 0x0008: | |
59 | case 0x000a: | |
fd0457a6 | 60 | case 0x0104: |
b9c9a21a CH |
61 | return -EINVAL; |
62 | case 0x0004: | |
a0138f59 | 63 | case 0x0106: /* "Wrong Channel Parm" for the op 0x003d */ |
b9c9a21a | 64 | return -EOPNOTSUPP; |
184b08af | 65 | case 0x000b: |
1c59a861 | 66 | case 0x0107: /* "Channel busy" for the op 0x003d */ |
184b08af SO |
67 | return -EBUSY; |
68 | case 0x0100: | |
69 | case 0x0102: | |
70 | return -ENOMEM; | |
4fea49a7 AW |
71 | case 0x0108: /* "HW limit exceeded" for the op 0x003d */ |
72 | return -EUSERS; | |
b9c9a21a CH |
73 | default: |
74 | return -EIO; | |
75 | } | |
76 | } | |
dae39843 | 77 | EXPORT_SYMBOL_GPL(chsc_error_from_response); |
b9c9a21a | 78 | |
7ad6a249 PO |
79 | struct chsc_ssd_area { |
80 | struct chsc_header request; | |
81 | u16 :10; | |
82 | u16 ssid:2; | |
83 | u16 :4; | |
84 | u16 f_sch; /* first subchannel */ | |
85 | u16 :16; | |
86 | u16 l_sch; /* last subchannel */ | |
87 | u32 :32; | |
88 | struct chsc_header response; | |
89 | u32 :32; | |
90 | u8 sch_valid : 1; | |
91 | u8 dev_valid : 1; | |
92 | u8 st : 3; /* subchannel type */ | |
93 | u8 zeroes : 3; | |
94 | u8 unit_addr; /* unit address */ | |
95 | u16 devno; /* device number */ | |
96 | u8 path_mask; | |
97 | u8 fla_valid_mask; | |
98 | u16 sch; /* subchannel */ | |
99 | u8 chpid[8]; /* chpids 0-7 */ | |
100 | u16 fla[8]; /* full link addresses 0-7 */ | |
ccaabeea | 101 | } __packed __aligned(PAGE_SIZE); |
7ad6a249 PO |
102 | |
103 | int chsc_get_ssd_info(struct subchannel_id schid, struct chsc_ssd_info *ssd) | |
1da177e4 | 104 | { |
7ad6a249 | 105 | struct chsc_ssd_area *ssd_area; |
d53c51f2 | 106 | unsigned long flags; |
7ad6a249 PO |
107 | int ccode; |
108 | int ret; | |
109 | int i; | |
110 | int mask; | |
1da177e4 | 111 | |
d53c51f2 | 112 | spin_lock_irqsave(&chsc_page_lock, flags); |
34196f82 SO |
113 | memset(chsc_page, 0, PAGE_SIZE); |
114 | ssd_area = chsc_page; | |
495a5b45 CH |
115 | ssd_area->request.length = 0x0010; |
116 | ssd_area->request.code = 0x0004; | |
7ad6a249 PO |
117 | ssd_area->ssid = schid.ssid; |
118 | ssd_area->f_sch = schid.sch_no; | |
119 | ssd_area->l_sch = schid.sch_no; | |
1da177e4 LT |
120 | |
121 | ccode = chsc(ssd_area); | |
7ad6a249 | 122 | /* Check response. */ |
1da177e4 | 123 | if (ccode > 0) { |
7ad6a249 | 124 | ret = (ccode == 3) ? -ENODEV : -EBUSY; |
34196f82 | 125 | goto out; |
1da177e4 | 126 | } |
b9c9a21a CH |
127 | ret = chsc_error_from_response(ssd_area->response.code); |
128 | if (ret != 0) { | |
7ad6a249 PO |
129 | CIO_MSG_EVENT(2, "chsc: ssd failed for 0.%x.%04x (rc=%04x)\n", |
130 | schid.ssid, schid.sch_no, | |
1da177e4 | 131 | ssd_area->response.code); |
34196f82 | 132 | goto out; |
1da177e4 | 133 | } |
7ad6a249 PO |
134 | if (!ssd_area->sch_valid) { |
135 | ret = -ENODEV; | |
34196f82 | 136 | goto out; |
1da177e4 | 137 | } |
7ad6a249 PO |
138 | /* Copy data */ |
139 | ret = 0; | |
140 | memset(ssd, 0, sizeof(struct chsc_ssd_info)); | |
b279a4f5 CH |
141 | if ((ssd_area->st != SUBCHANNEL_TYPE_IO) && |
142 | (ssd_area->st != SUBCHANNEL_TYPE_MSG)) | |
34196f82 | 143 | goto out; |
7ad6a249 PO |
144 | ssd->path_mask = ssd_area->path_mask; |
145 | ssd->fla_valid_mask = ssd_area->fla_valid_mask; | |
146 | for (i = 0; i < 8; i++) { | |
147 | mask = 0x80 >> i; | |
148 | if (ssd_area->path_mask & mask) { | |
149 | chp_id_init(&ssd->chpid[i]); | |
150 | ssd->chpid[i].id = ssd_area->chpid[i]; | |
1da177e4 | 151 | } |
7ad6a249 PO |
152 | if (ssd_area->fla_valid_mask & mask) |
153 | ssd->fla[i] = ssd_area->fla[i]; | |
1da177e4 | 154 | } |
34196f82 | 155 | out: |
d53c51f2 | 156 | spin_unlock_irqrestore(&chsc_page_lock, flags); |
1da177e4 LT |
157 | return ret; |
158 | } | |
159 | ||
da5b6cb1 SO |
160 | /** |
161 | * chsc_ssqd() - store subchannel QDIO data (SSQD) | |
162 | * @schid: id of the subchannel on which SSQD is performed | |
163 | * @ssqd: request and response block for SSQD | |
164 | * | |
165 | * Returns 0 on success. | |
166 | */ | |
167 | int chsc_ssqd(struct subchannel_id schid, struct chsc_ssqd_area *ssqd) | |
168 | { | |
169 | memset(ssqd, 0, sizeof(*ssqd)); | |
170 | ssqd->request.length = 0x0010; | |
171 | ssqd->request.code = 0x0024; | |
172 | ssqd->first_sch = schid.sch_no; | |
173 | ssqd->last_sch = schid.sch_no; | |
174 | ssqd->ssid = schid.ssid; | |
175 | ||
176 | if (chsc(ssqd)) | |
177 | return -EIO; | |
178 | ||
179 | return chsc_error_from_response(ssqd->response.code); | |
180 | } | |
181 | EXPORT_SYMBOL_GPL(chsc_ssqd); | |
182 | ||
ca4ba153 SO |
183 | /** |
184 | * chsc_sadc() - set adapter device controls (SADC) | |
185 | * @schid: id of the subchannel on which SADC is performed | |
186 | * @scssc: request and response block for SADC | |
187 | * @summary_indicator_addr: summary indicator address | |
188 | * @subchannel_indicator_addr: subchannel indicator address | |
92892240 | 189 | * @isc: Interruption Subclass for this subchannel |
ca4ba153 SO |
190 | * |
191 | * Returns 0 on success. | |
192 | */ | |
193 | int chsc_sadc(struct subchannel_id schid, struct chsc_scssc_area *scssc, | |
92892240 | 194 | u64 summary_indicator_addr, u64 subchannel_indicator_addr, u8 isc) |
ca4ba153 SO |
195 | { |
196 | memset(scssc, 0, sizeof(*scssc)); | |
197 | scssc->request.length = 0x0fe0; | |
198 | scssc->request.code = 0x0021; | |
199 | scssc->operation_code = 0; | |
200 | ||
201 | scssc->summary_indicator_addr = summary_indicator_addr; | |
202 | scssc->subchannel_indicator_addr = subchannel_indicator_addr; | |
203 | ||
204 | scssc->ks = PAGE_DEFAULT_KEY >> 4; | |
205 | scssc->kc = PAGE_DEFAULT_KEY >> 4; | |
92892240 | 206 | scssc->isc = isc; |
ca4ba153 SO |
207 | scssc->schid = schid; |
208 | ||
209 | /* enable the time delay disablement facility */ | |
210 | if (css_general_characteristics.aif_tdd) | |
211 | scssc->word_with_d_bit = 0x10000000; | |
212 | ||
213 | if (chsc(scssc)) | |
214 | return -EIO; | |
215 | ||
216 | return chsc_error_from_response(scssc->response.code); | |
217 | } | |
218 | EXPORT_SYMBOL_GPL(chsc_sadc); | |
219 | ||
e82a1567 | 220 | static int s390_subchannel_remove_chpid(struct subchannel *sch, void *data) |
1da177e4 | 221 | { |
2ec22984 | 222 | spin_lock_irq(sch->lock); |
c820de39 CH |
223 | if (sch->driver && sch->driver->chp_event) |
224 | if (sch->driver->chp_event(sch, data, CHP_OFFLINE) != 0) | |
1da177e4 | 225 | goto out_unreg; |
2ec22984 | 226 | spin_unlock_irq(sch->lock); |
1da177e4 | 227 | return 0; |
387b734f | 228 | |
1da177e4 | 229 | out_unreg: |
1da177e4 | 230 | sch->lpm = 0; |
387b734f | 231 | spin_unlock_irq(sch->lock); |
83b3370c | 232 | css_schedule_eval(sch->schid); |
1da177e4 LT |
233 | return 0; |
234 | } | |
235 | ||
e6b6e10a | 236 | void chsc_chp_offline(struct chp_id chpid) |
1da177e4 | 237 | { |
9f3d6d7a | 238 | struct channel_path *chp = chpid_to_chp(chpid); |
99611f87 | 239 | struct chp_link link; |
9f3d6d7a | 240 | char dbf_txt[15]; |
1da177e4 | 241 | |
f86635fa | 242 | sprintf(dbf_txt, "chpr%x.%02x", chpid.cssid, chpid.id); |
1da177e4 LT |
243 | CIO_TRACE_EVENT(2, dbf_txt); |
244 | ||
e6b6e10a | 245 | if (chp_get_status(chpid) <= 0) |
1da177e4 | 246 | return; |
99611f87 CH |
247 | memset(&link, 0, sizeof(struct chp_link)); |
248 | link.chpid = chpid; | |
22806dc1 CH |
249 | /* Wait until previous actions have settled. */ |
250 | css_wait_for_slow_path(); | |
9f3d6d7a SO |
251 | |
252 | mutex_lock(&chp->lock); | |
253 | chp_update_desc(chp); | |
254 | mutex_unlock(&chp->lock); | |
255 | ||
99611f87 | 256 | for_each_subchannel_staged(s390_subchannel_remove_chpid, NULL, &link); |
1da177e4 LT |
257 | } |
258 | ||
e82a1567 | 259 | static int __s390_process_res_acc(struct subchannel *sch, void *data) |
1da177e4 | 260 | { |
2ec22984 | 261 | spin_lock_irq(sch->lock); |
c820de39 CH |
262 | if (sch->driver && sch->driver->chp_event) |
263 | sch->driver->chp_event(sch, data, CHP_ONLINE); | |
2ec22984 | 264 | spin_unlock_irq(sch->lock); |
e82a1567 | 265 | |
dd9963f9 | 266 | return 0; |
f97a56fb CH |
267 | } |
268 | ||
99611f87 | 269 | static void s390_process_res_acc(struct chp_link *link) |
f97a56fb | 270 | { |
1da177e4 LT |
271 | char dbf_txt[15]; |
272 | ||
99611f87 CH |
273 | sprintf(dbf_txt, "accpr%x.%02x", link->chpid.cssid, |
274 | link->chpid.id); | |
1da177e4 | 275 | CIO_TRACE_EVENT( 2, dbf_txt); |
99611f87 CH |
276 | if (link->fla != 0) { |
277 | sprintf(dbf_txt, "fla%x", link->fla); | |
1da177e4 LT |
278 | CIO_TRACE_EVENT( 2, dbf_txt); |
279 | } | |
22806dc1 CH |
280 | /* Wait until previous actions have settled. */ |
281 | css_wait_for_slow_path(); | |
1da177e4 LT |
282 | /* |
283 | * I/O resources may have become accessible. | |
284 | * Scan through all subchannels that may be concerned and | |
285 | * do a validation on those. | |
286 | * The more information we have (info), the less scanning | |
287 | * will we have to do. | |
288 | */ | |
449666dd PO |
289 | for_each_subchannel_staged(__s390_process_res_acc, NULL, link); |
290 | css_schedule_reprobe(); | |
1da177e4 LT |
291 | } |
292 | ||
32ef9388 VV |
293 | static int process_fces_event(struct subchannel *sch, void *data) |
294 | { | |
295 | spin_lock_irq(sch->lock); | |
296 | if (sch->driver && sch->driver->chp_event) | |
297 | sch->driver->chp_event(sch, data, CHP_FCES_EVENT); | |
298 | spin_unlock_irq(sch->lock); | |
299 | return 0; | |
300 | } | |
301 | ||
cbc0dd1f JG |
302 | struct chsc_sei_nt0_area { |
303 | u8 flags; | |
304 | u8 vf; /* validity flags */ | |
305 | u8 rs; /* reporting source */ | |
306 | u8 cc; /* content code */ | |
307 | u16 fla; /* full link address */ | |
308 | u16 rsid; /* reporting source id */ | |
184357a5 PO |
309 | u32 reserved1; |
310 | u32 reserved2; | |
184357a5 | 311 | /* ccdf has to be big enough for a link-incident record */ |
cbc0dd1f JG |
312 | u8 ccdf[PAGE_SIZE - 24 - 16]; /* content-code dependent field */ |
313 | } __packed; | |
314 | ||
315 | struct chsc_sei_nt2_area { | |
316 | u8 flags; /* p and v bit */ | |
317 | u8 reserved1; | |
318 | u8 reserved2; | |
319 | u8 cc; /* content code */ | |
320 | u32 reserved3[13]; | |
321 | u8 ccdf[PAGE_SIZE - 24 - 56]; /* content-code dependent field */ | |
322 | } __packed; | |
323 | ||
509d97b6 | 324 | #define CHSC_SEI_NT0 (1ULL << 63) |
cbc0dd1f JG |
325 | #define CHSC_SEI_NT2 (1ULL << 61) |
326 | ||
327 | struct chsc_sei { | |
328 | struct chsc_header request; | |
329 | u32 reserved1; | |
330 | u64 ntsm; /* notification type mask */ | |
331 | struct chsc_header response; | |
509d97b6 SO |
332 | u32 :24; |
333 | u8 nt; | |
cbc0dd1f JG |
334 | union { |
335 | struct chsc_sei_nt0_area nt0_area; | |
336 | struct chsc_sei_nt2_area nt2_area; | |
337 | u8 nt_area[PAGE_SIZE - 24]; | |
338 | } u; | |
ccaabeea | 339 | } __packed __aligned(PAGE_SIZE); |
cbc0dd1f | 340 | |
1d2334cb PO |
341 | /* |
342 | * Link Incident Record as defined in SA22-7202, "ESCON I/O Interface" | |
343 | */ | |
344 | ||
345 | #define LIR_IQ_CLASS_INFO 0 | |
346 | #define LIR_IQ_CLASS_DEGRADED 1 | |
347 | #define LIR_IQ_CLASS_NOT_OPERATIONAL 2 | |
348 | ||
349 | struct lir { | |
350 | struct { | |
351 | u32 null:1; | |
352 | u32 reserved:3; | |
353 | u32 class:2; | |
354 | u32 reserved2:2; | |
355 | } __packed iq; | |
356 | u32 ic:8; | |
357 | u32 reserved:16; | |
358 | struct node_descriptor incident_node; | |
359 | struct node_descriptor attached_node; | |
360 | u8 reserved2[32]; | |
361 | } __packed; | |
362 | ||
363 | #define PARAMS_LEN 10 /* PARAMS=xx,xxxxxx */ | |
364 | #define NODEID_LEN 35 /* NODEID=tttttt/mdl,mmm.ppssssssssssss,xxxx */ | |
365 | ||
366 | /* Copy EBCIDC text, convert to ASCII and optionally add delimiter. */ | |
367 | static char *store_ebcdic(char *dest, const char *src, unsigned long len, | |
368 | char delim) | |
369 | { | |
370 | memcpy(dest, src, len); | |
371 | EBCASC(dest, len); | |
372 | ||
373 | if (delim) | |
374 | dest[len++] = delim; | |
375 | ||
376 | return dest + len; | |
377 | } | |
378 | ||
32ef9388 VV |
379 | static void chsc_link_from_sei(struct chp_link *link, |
380 | struct chsc_sei_nt0_area *sei_area) | |
381 | { | |
382 | if ((sei_area->vf & SEI_VF_FLA) != 0) { | |
383 | link->fla = sei_area->fla; | |
384 | link->fla_mask = ((sei_area->vf & SEI_VF_FLA) == SEI_VF_FLA) ? | |
385 | 0xffff : 0xff00; | |
386 | } | |
387 | } | |
388 | ||
1d2334cb PO |
389 | /* Format node ID and parameters for output in LIR log message. */ |
390 | static void format_node_data(char *params, char *id, struct node_descriptor *nd) | |
391 | { | |
392 | memset(params, 0, PARAMS_LEN); | |
393 | memset(id, 0, NODEID_LEN); | |
394 | ||
395 | if (nd->validity != ND_VALIDITY_VALID) { | |
396 | strncpy(params, "n/a", PARAMS_LEN - 1); | |
397 | strncpy(id, "n/a", NODEID_LEN - 1); | |
398 | return; | |
399 | } | |
400 | ||
401 | /* PARAMS=xx,xxxxxx */ | |
402 | snprintf(params, PARAMS_LEN, "%02x,%06x", nd->byte0, nd->params); | |
403 | /* NODEID=tttttt/mdl,mmm.ppssssssssssss,xxxx */ | |
404 | id = store_ebcdic(id, nd->type, sizeof(nd->type), '/'); | |
405 | id = store_ebcdic(id, nd->model, sizeof(nd->model), ','); | |
406 | id = store_ebcdic(id, nd->manufacturer, sizeof(nd->manufacturer), '.'); | |
407 | id = store_ebcdic(id, nd->plant, sizeof(nd->plant), 0); | |
408 | id = store_ebcdic(id, nd->seq, sizeof(nd->seq), ','); | |
409 | sprintf(id, "%04X", nd->tag); | |
410 | } | |
411 | ||
cbc0dd1f | 412 | static void chsc_process_sei_link_incident(struct chsc_sei_nt0_area *sei_area) |
184357a5 | 413 | { |
1d2334cb PO |
414 | struct lir *lir = (struct lir *) &sei_area->ccdf; |
415 | char iuparams[PARAMS_LEN], iunodeid[NODEID_LEN], auparams[PARAMS_LEN], | |
416 | aunodeid[NODEID_LEN]; | |
184357a5 | 417 | |
1d2334cb PO |
418 | CIO_CRW_EVENT(4, "chsc: link incident (rs=%02x, rs_id=%04x, iq=%02x)\n", |
419 | sei_area->rs, sei_area->rsid, sei_area->ccdf[0]); | |
420 | ||
421 | /* Ignore NULL Link Incident Records. */ | |
422 | if (lir->iq.null) | |
83b3370c | 423 | return; |
1d2334cb PO |
424 | |
425 | /* Inform user that a link requires maintenance actions because it has | |
426 | * become degraded or not operational. Note that this log message is | |
427 | * the primary intention behind a Link Incident Record. */ | |
428 | ||
429 | format_node_data(iuparams, iunodeid, &lir->incident_node); | |
430 | format_node_data(auparams, aunodeid, &lir->attached_node); | |
431 | ||
432 | switch (lir->iq.class) { | |
433 | case LIR_IQ_CLASS_DEGRADED: | |
434 | pr_warn("Link degraded: RS=%02x RSID=%04x IC=%02x " | |
435 | "IUPARAMS=%s IUNODEID=%s AUPARAMS=%s AUNODEID=%s\n", | |
436 | sei_area->rs, sei_area->rsid, lir->ic, iuparams, | |
437 | iunodeid, auparams, aunodeid); | |
438 | break; | |
439 | case LIR_IQ_CLASS_NOT_OPERATIONAL: | |
440 | pr_err("Link stopped: RS=%02x RSID=%04x IC=%02x " | |
441 | "IUPARAMS=%s IUNODEID=%s AUPARAMS=%s AUNODEID=%s\n", | |
442 | sei_area->rs, sei_area->rsid, lir->ic, iuparams, | |
443 | iunodeid, auparams, aunodeid); | |
444 | break; | |
445 | default: | |
446 | break; | |
f86635fa | 447 | } |
184357a5 PO |
448 | } |
449 | ||
cbc0dd1f | 450 | static void chsc_process_sei_res_acc(struct chsc_sei_nt0_area *sei_area) |
1da177e4 | 451 | { |
af2e460a | 452 | struct channel_path *chp; |
99611f87 | 453 | struct chp_link link; |
f86635fa | 454 | struct chp_id chpid; |
184357a5 | 455 | int status; |
184357a5 PO |
456 | |
457 | CIO_CRW_EVENT(4, "chsc: resource accessibility event (rs=%02x, " | |
458 | "rs_id=%04x)\n", sei_area->rs, sei_area->rsid); | |
459 | if (sei_area->rs != 4) | |
83b3370c | 460 | return; |
f86635fa PO |
461 | chp_id_init(&chpid); |
462 | chpid.id = sei_area->rsid; | |
184357a5 | 463 | /* allocate a new channel path structure, if needed */ |
e6b6e10a | 464 | status = chp_get_status(chpid); |
af2e460a | 465 | if (!status) |
83b3370c | 466 | return; |
af2e460a SO |
467 | |
468 | if (status < 0) { | |
469 | chp_new(chpid); | |
470 | } else { | |
471 | chp = chpid_to_chp(chpid); | |
472 | mutex_lock(&chp->lock); | |
473 | chp_update_desc(chp); | |
474 | mutex_unlock(&chp->lock); | |
475 | } | |
99611f87 CH |
476 | memset(&link, 0, sizeof(struct chp_link)); |
477 | link.chpid = chpid; | |
32ef9388 | 478 | chsc_link_from_sei(&link, sei_area); |
99611f87 | 479 | s390_process_res_acc(&link); |
184357a5 PO |
480 | } |
481 | ||
cbc0dd1f | 482 | static void chsc_process_sei_chp_avail(struct chsc_sei_nt0_area *sei_area) |
fca894ed SO |
483 | { |
484 | struct channel_path *chp; | |
485 | struct chp_id chpid; | |
486 | u8 *data; | |
487 | int num; | |
488 | ||
489 | CIO_CRW_EVENT(4, "chsc: channel path availability information\n"); | |
490 | if (sei_area->rs != 0) | |
491 | return; | |
492 | data = sei_area->ccdf; | |
493 | chp_id_init(&chpid); | |
494 | for (num = 0; num <= __MAX_CHPID; num++) { | |
495 | if (!chp_test_bit(data, num)) | |
496 | continue; | |
497 | chpid.id = num; | |
498 | ||
499 | CIO_CRW_EVENT(4, "Update information for channel path " | |
500 | "%x.%02x\n", chpid.cssid, chpid.id); | |
501 | chp = chpid_to_chp(chpid); | |
502 | if (!chp) { | |
503 | chp_new(chpid); | |
504 | continue; | |
505 | } | |
506 | mutex_lock(&chp->lock); | |
cce0eacc | 507 | chp_update_desc(chp); |
fca894ed SO |
508 | mutex_unlock(&chp->lock); |
509 | } | |
510 | } | |
511 | ||
e5854a58 PO |
512 | struct chp_config_data { |
513 | u8 map[32]; | |
514 | u8 op; | |
515 | u8 pc; | |
516 | }; | |
517 | ||
cbc0dd1f | 518 | static void chsc_process_sei_chp_config(struct chsc_sei_nt0_area *sei_area) |
e5854a58 PO |
519 | { |
520 | struct chp_config_data *data; | |
521 | struct chp_id chpid; | |
522 | int num; | |
e6d5a428 | 523 | char *events[3] = {"configure", "deconfigure", "cancel deconfigure"}; |
e5854a58 PO |
524 | |
525 | CIO_CRW_EVENT(4, "chsc: channel-path-configuration notification\n"); | |
526 | if (sei_area->rs != 0) | |
83b3370c | 527 | return; |
e5854a58 PO |
528 | data = (struct chp_config_data *) &(sei_area->ccdf); |
529 | chp_id_init(&chpid); | |
530 | for (num = 0; num <= __MAX_CHPID; num++) { | |
531 | if (!chp_test_bit(data->map, num)) | |
532 | continue; | |
533 | chpid.id = num; | |
e6d5a428 ME |
534 | pr_notice("Processing %s for channel path %x.%02x\n", |
535 | events[data->op], chpid.cssid, chpid.id); | |
e5854a58 PO |
536 | switch (data->op) { |
537 | case 0: | |
538 | chp_cfg_schedule(chpid, 1); | |
539 | break; | |
540 | case 1: | |
541 | chp_cfg_schedule(chpid, 0); | |
542 | break; | |
543 | case 2: | |
544 | chp_cfg_cancel_deconfigure(chpid); | |
545 | break; | |
546 | } | |
547 | } | |
e5854a58 PO |
548 | } |
549 | ||
cbc0dd1f | 550 | static void chsc_process_sei_scm_change(struct chsc_sei_nt0_area *sei_area) |
40ff4cc0 SO |
551 | { |
552 | int ret; | |
553 | ||
554 | CIO_CRW_EVENT(4, "chsc: scm change notification\n"); | |
555 | if (sei_area->rs != 7) | |
556 | return; | |
557 | ||
558 | ret = scm_update_information(); | |
559 | if (ret) | |
560 | CIO_CRW_EVENT(0, "chsc: updating change notification" | |
561 | " failed (rc=%d).\n", ret); | |
562 | } | |
563 | ||
aebfa669 SO |
564 | static void chsc_process_sei_scm_avail(struct chsc_sei_nt0_area *sei_area) |
565 | { | |
566 | int ret; | |
567 | ||
568 | CIO_CRW_EVENT(4, "chsc: scm available information\n"); | |
569 | if (sei_area->rs != 7) | |
570 | return; | |
571 | ||
572 | ret = scm_process_availability_information(); | |
573 | if (ret) | |
574 | CIO_CRW_EVENT(0, "chsc: process availability information" | |
575 | " failed (rc=%d).\n", ret); | |
576 | } | |
577 | ||
0d9c038f TK |
578 | static void chsc_process_sei_ap_cfg_chg(struct chsc_sei_nt0_area *sei_area) |
579 | { | |
580 | CIO_CRW_EVENT(3, "chsc: ap config changed\n"); | |
581 | if (sei_area->rs != 5) | |
582 | return; | |
583 | ||
584 | ap_bus_cfg_chg(); | |
585 | } | |
586 | ||
32ef9388 VV |
587 | static void chsc_process_sei_fces_event(struct chsc_sei_nt0_area *sei_area) |
588 | { | |
589 | struct chp_link link; | |
590 | struct chp_id chpid; | |
591 | struct channel_path *chp; | |
592 | ||
593 | CIO_CRW_EVENT(4, | |
594 | "chsc: FCES status notification (rs=%02x, rs_id=%04x, FCES-status=%x)\n", | |
595 | sei_area->rs, sei_area->rsid, sei_area->ccdf[0]); | |
596 | ||
597 | if (sei_area->rs != SEI_RS_CHPID) | |
598 | return; | |
599 | chp_id_init(&chpid); | |
600 | chpid.id = sei_area->rsid; | |
601 | ||
602 | /* Ignore the event on unknown/invalid chp */ | |
603 | chp = chpid_to_chp(chpid); | |
604 | if (!chp) | |
605 | return; | |
606 | ||
607 | memset(&link, 0, sizeof(struct chp_link)); | |
608 | link.chpid = chpid; | |
609 | chsc_link_from_sei(&link, sei_area); | |
610 | ||
611 | for_each_subchannel_staged(process_fces_event, NULL, &link); | |
612 | } | |
613 | ||
cbc0dd1f | 614 | static void chsc_process_sei_nt2(struct chsc_sei_nt2_area *sei_area) |
184357a5 | 615 | { |
cbc0dd1f JG |
616 | switch (sei_area->cc) { |
617 | case 1: | |
618 | zpci_event_error(sei_area->ccdf); | |
619 | break; | |
620 | case 2: | |
621 | zpci_event_availability(sei_area->ccdf); | |
622 | break; | |
623 | default: | |
9a17e972 | 624 | CIO_CRW_EVENT(2, "chsc: sei nt2 unhandled cc=%d\n", |
cbc0dd1f JG |
625 | sei_area->cc); |
626 | break; | |
83b3370c | 627 | } |
cbc0dd1f JG |
628 | } |
629 | ||
630 | static void chsc_process_sei_nt0(struct chsc_sei_nt0_area *sei_area) | |
631 | { | |
184357a5 | 632 | /* which kind of information was stored? */ |
184357a5 PO |
633 | switch (sei_area->cc) { |
634 | case 1: /* link incident*/ | |
83b3370c | 635 | chsc_process_sei_link_incident(sei_area); |
184357a5 | 636 | break; |
fca894ed | 637 | case 2: /* i/o resource accessibility */ |
83b3370c | 638 | chsc_process_sei_res_acc(sei_area); |
184357a5 | 639 | break; |
0d9c038f TK |
640 | case 3: /* ap config changed */ |
641 | chsc_process_sei_ap_cfg_chg(sei_area); | |
642 | break; | |
fca894ed SO |
643 | case 7: /* channel-path-availability information */ |
644 | chsc_process_sei_chp_avail(sei_area); | |
645 | break; | |
e5854a58 | 646 | case 8: /* channel-path-configuration notification */ |
83b3370c | 647 | chsc_process_sei_chp_config(sei_area); |
e5854a58 | 648 | break; |
40ff4cc0 SO |
649 | case 12: /* scm change notification */ |
650 | chsc_process_sei_scm_change(sei_area); | |
651 | break; | |
aebfa669 SO |
652 | case 14: /* scm available notification */ |
653 | chsc_process_sei_scm_avail(sei_area); | |
654 | break; | |
32ef9388 VV |
655 | case 15: /* FCES event notification */ |
656 | chsc_process_sei_fces_event(sei_area); | |
657 | break; | |
184357a5 | 658 | default: /* other stuff */ |
9a17e972 | 659 | CIO_CRW_EVENT(2, "chsc: sei nt0 unhandled cc=%d\n", |
184357a5 PO |
660 | sei_area->cc); |
661 | break; | |
662 | } | |
9a17e972 SO |
663 | |
664 | /* Check if we might have lost some information. */ | |
665 | if (sei_area->flags & 0x40) { | |
666 | CIO_CRW_EVENT(2, "chsc: event overflow\n"); | |
667 | css_schedule_eval_all(); | |
668 | } | |
184357a5 PO |
669 | } |
670 | ||
9a17e972 | 671 | static void chsc_process_event_information(struct chsc_sei *sei, u64 ntsm) |
cbc0dd1f | 672 | { |
06cd7a87 SO |
673 | static int ntsm_unsupported; |
674 | ||
675 | while (true) { | |
cbc0dd1f JG |
676 | memset(sei, 0, sizeof(*sei)); |
677 | sei->request.length = 0x0010; | |
678 | sei->request.code = 0x000e; | |
06cd7a87 SO |
679 | if (!ntsm_unsupported) |
680 | sei->ntsm = ntsm; | |
cbc0dd1f JG |
681 | |
682 | if (chsc(sei)) | |
683 | break; | |
684 | ||
9a17e972 | 685 | if (sei->response.code != 0x0001) { |
06cd7a87 SO |
686 | CIO_CRW_EVENT(2, "chsc: sei failed (rc=%04x, ntsm=%llx)\n", |
687 | sei->response.code, sei->ntsm); | |
688 | ||
689 | if (sei->response.code == 3 && sei->ntsm) { | |
690 | /* Fallback for old firmware. */ | |
691 | ntsm_unsupported = 1; | |
692 | continue; | |
693 | } | |
cbc0dd1f JG |
694 | break; |
695 | } | |
cbc0dd1f | 696 | |
9a17e972 SO |
697 | CIO_CRW_EVENT(2, "chsc: sei successful (nt=%d)\n", sei->nt); |
698 | switch (sei->nt) { | |
699 | case 0: | |
700 | chsc_process_sei_nt0(&sei->u.nt0_area); | |
701 | break; | |
702 | case 2: | |
703 | chsc_process_sei_nt2(&sei->u.nt2_area); | |
704 | break; | |
705 | default: | |
706 | CIO_CRW_EVENT(2, "chsc: unhandled nt: %d\n", sei->nt); | |
707 | break; | |
708 | } | |
06cd7a87 SO |
709 | |
710 | if (!(sei->u.nt0_area.flags & 0x80)) | |
711 | break; | |
712 | } | |
cbc0dd1f JG |
713 | } |
714 | ||
9a17e972 SO |
715 | /* |
716 | * Handle channel subsystem related CRWs. | |
717 | * Use store event information to find out what's going on. | |
718 | * | |
719 | * Note: Access to sei_page is serialized through machine check handler | |
720 | * thread, so no need for locking. | |
721 | */ | |
c1156189 | 722 | static void chsc_process_crw(struct crw *crw0, struct crw *crw1, int overflow) |
184357a5 | 723 | { |
9a17e972 | 724 | struct chsc_sei *sei = sei_page; |
1da177e4 | 725 | |
c1156189 CH |
726 | if (overflow) { |
727 | css_schedule_eval_all(); | |
728 | return; | |
729 | } | |
730 | CIO_CRW_EVENT(2, "CRW reports slct=%d, oflw=%d, " | |
731 | "chn=%d, rsc=%X, anc=%d, erc=%X, rsid=%X\n", | |
732 | crw0->slct, crw0->oflw, crw0->chn, crw0->rsc, crw0->anc, | |
733 | crw0->erc, crw0->rsid); | |
1da177e4 | 734 | |
c1156189 | 735 | CIO_TRACE_EVENT(2, "prcss"); |
9a17e972 | 736 | chsc_process_event_information(sei, CHSC_SEI_NT0 | CHSC_SEI_NT2); |
1da177e4 LT |
737 | } |
738 | ||
83b3370c | 739 | void chsc_chp_online(struct chp_id chpid) |
f97a56fb | 740 | { |
9f3d6d7a | 741 | struct channel_path *chp = chpid_to_chp(chpid); |
99611f87 | 742 | struct chp_link link; |
9f3d6d7a | 743 | char dbf_txt[15]; |
1da177e4 | 744 | |
f86635fa | 745 | sprintf(dbf_txt, "cadd%x.%02x", chpid.cssid, chpid.id); |
1da177e4 LT |
746 | CIO_TRACE_EVENT(2, dbf_txt); |
747 | ||
22806dc1 | 748 | if (chp_get_status(chpid) != 0) { |
99611f87 CH |
749 | memset(&link, 0, sizeof(struct chp_link)); |
750 | link.chpid = chpid; | |
22806dc1 CH |
751 | /* Wait until previous actions have settled. */ |
752 | css_wait_for_slow_path(); | |
9f3d6d7a SO |
753 | |
754 | mutex_lock(&chp->lock); | |
755 | chp_update_desc(chp); | |
756 | mutex_unlock(&chp->lock); | |
757 | ||
c820de39 | 758 | for_each_subchannel_staged(__s390_process_res_acc, NULL, |
99611f87 | 759 | &link); |
9955e8d1 | 760 | css_schedule_reprobe(); |
22806dc1 | 761 | } |
1da177e4 LT |
762 | } |
763 | ||
f86635fa PO |
764 | static void __s390_subchannel_vary_chpid(struct subchannel *sch, |
765 | struct chp_id chpid, int on) | |
1da177e4 | 766 | { |
1da177e4 | 767 | unsigned long flags; |
99611f87 | 768 | struct chp_link link; |
1da177e4 | 769 | |
99611f87 CH |
770 | memset(&link, 0, sizeof(struct chp_link)); |
771 | link.chpid = chpid; | |
2ec22984 | 772 | spin_lock_irqsave(sch->lock, flags); |
c820de39 | 773 | if (sch->driver && sch->driver->chp_event) |
99611f87 | 774 | sch->driver->chp_event(sch, &link, |
c820de39 | 775 | on ? CHP_VARY_ON : CHP_VARY_OFF); |
2ec22984 | 776 | spin_unlock_irqrestore(sch->lock, flags); |
1da177e4 LT |
777 | } |
778 | ||
e82a1567 | 779 | static int s390_subchannel_vary_chpid_off(struct subchannel *sch, void *data) |
1da177e4 | 780 | { |
e82a1567 | 781 | struct chp_id *chpid = data; |
1da177e4 LT |
782 | |
783 | __s390_subchannel_vary_chpid(sch, *chpid, 0); | |
784 | return 0; | |
785 | } | |
786 | ||
e82a1567 | 787 | static int s390_subchannel_vary_chpid_on(struct subchannel *sch, void *data) |
1da177e4 | 788 | { |
e82a1567 | 789 | struct chp_id *chpid = data; |
1da177e4 LT |
790 | |
791 | __s390_subchannel_vary_chpid(sch, *chpid, 1); | |
792 | return 0; | |
793 | } | |
794 | ||
e6b6e10a PO |
795 | /** |
796 | * chsc_chp_vary - propagate channel-path vary operation to subchannels | |
797 | * @chpid: channl-path ID | |
798 | * @on: non-zero for vary online, zero for vary offline | |
1da177e4 | 799 | */ |
e6b6e10a | 800 | int chsc_chp_vary(struct chp_id chpid, int on) |
1da177e4 | 801 | { |
c38a90a3 | 802 | struct channel_path *chp = chpid_to_chp(chpid); |
99611f87 | 803 | |
1da177e4 LT |
804 | /* |
805 | * Redo PathVerification on the devices the chpid connects to | |
806 | */ | |
c38a90a3 | 807 | if (on) { |
cce0eacc PO |
808 | /* Try to update the channel path description. */ |
809 | chp_update_desc(chp); | |
e82a1567 | 810 | for_each_subchannel_staged(s390_subchannel_vary_chpid_on, |
449666dd PO |
811 | NULL, &chpid); |
812 | css_schedule_reprobe(); | |
c38a90a3 | 813 | } else |
e82a1567 | 814 | for_each_subchannel_staged(s390_subchannel_vary_chpid_off, |
3b484ec6 | 815 | NULL, &chpid); |
e82a1567 | 816 | |
1da177e4 LT |
817 | return 0; |
818 | } | |
819 | ||
495a5b45 CH |
820 | static void |
821 | chsc_remove_cmg_attr(struct channel_subsystem *css) | |
822 | { | |
823 | int i; | |
824 | ||
825 | for (i = 0; i <= __MAX_CHPID; i++) { | |
826 | if (!css->chps[i]) | |
827 | continue; | |
e6b6e10a | 828 | chp_remove_cmg_attr(css->chps[i]); |
495a5b45 CH |
829 | } |
830 | } | |
831 | ||
832 | static int | |
833 | chsc_add_cmg_attr(struct channel_subsystem *css) | |
834 | { | |
835 | int i, ret; | |
836 | ||
837 | ret = 0; | |
838 | for (i = 0; i <= __MAX_CHPID; i++) { | |
839 | if (!css->chps[i]) | |
840 | continue; | |
e6b6e10a | 841 | ret = chp_add_cmg_attr(css->chps[i]); |
495a5b45 CH |
842 | if (ret) |
843 | goto cleanup; | |
844 | } | |
845 | return ret; | |
846 | cleanup: | |
847 | for (--i; i >= 0; i--) { | |
848 | if (!css->chps[i]) | |
849 | continue; | |
e6b6e10a | 850 | chp_remove_cmg_attr(css->chps[i]); |
495a5b45 CH |
851 | } |
852 | return ret; | |
853 | } | |
854 | ||
34196f82 | 855 | int __chsc_do_secm(struct channel_subsystem *css, int enable) |
495a5b45 CH |
856 | { |
857 | struct { | |
858 | struct chsc_header request; | |
859 | u32 operation_code : 2; | |
860 | u32 : 30; | |
861 | u32 key : 4; | |
862 | u32 : 28; | |
863 | u32 zeroes1; | |
864 | u32 cub_addr1; | |
865 | u32 zeroes2; | |
866 | u32 cub_addr2; | |
867 | u32 reserved[13]; | |
868 | struct chsc_header response; | |
869 | u32 status : 8; | |
870 | u32 : 4; | |
871 | u32 fmt : 4; | |
872 | u32 : 16; | |
ccaabeea | 873 | } *secm_area; |
d53c51f2 | 874 | unsigned long flags; |
495a5b45 CH |
875 | int ret, ccode; |
876 | ||
d53c51f2 | 877 | spin_lock_irqsave(&chsc_page_lock, flags); |
34196f82 SO |
878 | memset(chsc_page, 0, PAGE_SIZE); |
879 | secm_area = chsc_page; | |
495a5b45 CH |
880 | secm_area->request.length = 0x0050; |
881 | secm_area->request.code = 0x0016; | |
882 | ||
d1bf8590 | 883 | secm_area->key = PAGE_DEFAULT_KEY >> 4; |
495a5b45 CH |
884 | secm_area->cub_addr1 = (u64)(unsigned long)css->cub_addr1; |
885 | secm_area->cub_addr2 = (u64)(unsigned long)css->cub_addr2; | |
886 | ||
887 | secm_area->operation_code = enable ? 0 : 1; | |
888 | ||
889 | ccode = chsc(secm_area); | |
34196f82 SO |
890 | if (ccode > 0) { |
891 | ret = (ccode == 3) ? -ENODEV : -EBUSY; | |
892 | goto out; | |
893 | } | |
495a5b45 CH |
894 | |
895 | switch (secm_area->response.code) { | |
b9c9a21a CH |
896 | case 0x0102: |
897 | case 0x0103: | |
495a5b45 | 898 | ret = -EINVAL; |
17e7d87d | 899 | break; |
495a5b45 | 900 | default: |
b9c9a21a | 901 | ret = chsc_error_from_response(secm_area->response.code); |
495a5b45 | 902 | } |
b9c9a21a CH |
903 | if (ret != 0) |
904 | CIO_CRW_EVENT(2, "chsc: secm failed (rc=%04x)\n", | |
905 | secm_area->response.code); | |
34196f82 | 906 | out: |
d53c51f2 | 907 | spin_unlock_irqrestore(&chsc_page_lock, flags); |
495a5b45 CH |
908 | return ret; |
909 | } | |
910 | ||
911 | int | |
912 | chsc_secm(struct channel_subsystem *css, int enable) | |
913 | { | |
495a5b45 CH |
914 | int ret; |
915 | ||
495a5b45 CH |
916 | if (enable && !css->cm_enabled) { |
917 | css->cub_addr1 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
918 | css->cub_addr2 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
919 | if (!css->cub_addr1 || !css->cub_addr2) { | |
920 | free_page((unsigned long)css->cub_addr1); | |
921 | free_page((unsigned long)css->cub_addr2); | |
495a5b45 CH |
922 | return -ENOMEM; |
923 | } | |
924 | } | |
34196f82 | 925 | ret = __chsc_do_secm(css, enable); |
495a5b45 CH |
926 | if (!ret) { |
927 | css->cm_enabled = enable; | |
928 | if (css->cm_enabled) { | |
929 | ret = chsc_add_cmg_attr(css); | |
930 | if (ret) { | |
34196f82 | 931 | __chsc_do_secm(css, 0); |
495a5b45 CH |
932 | css->cm_enabled = 0; |
933 | } | |
934 | } else | |
935 | chsc_remove_cmg_attr(css); | |
936 | } | |
8c4941c5 | 937 | if (!css->cm_enabled) { |
495a5b45 CH |
938 | free_page((unsigned long)css->cub_addr1); |
939 | free_page((unsigned long)css->cub_addr2); | |
940 | } | |
495a5b45 CH |
941 | return ret; |
942 | } | |
943 | ||
9d92a7e1 | 944 | int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt, |
906c9768 | 945 | int c, int m, void *page) |
1da177e4 | 946 | { |
906c9768 | 947 | struct chsc_scpd *scpd_area; |
1da177e4 LT |
948 | int ccode, ret; |
949 | ||
f9773768 SO |
950 | if ((rfmt == 1 || rfmt == 0) && c == 1 && |
951 | !css_general_characteristics.fcs) | |
9d92a7e1 CH |
952 | return -EINVAL; |
953 | if ((rfmt == 2) && !css_general_characteristics.cib) | |
954 | return -EINVAL; | |
fcc6dd4b SO |
955 | if ((rfmt == 3) && !css_general_characteristics.util_str) |
956 | return -EINVAL; | |
1da177e4 | 957 | |
906c9768 SO |
958 | memset(page, 0, PAGE_SIZE); |
959 | scpd_area = page; | |
495a5b45 CH |
960 | scpd_area->request.length = 0x0010; |
961 | scpd_area->request.code = 0x0002; | |
9d92a7e1 | 962 | scpd_area->cssid = chpid.cssid; |
f86635fa PO |
963 | scpd_area->first_chpid = chpid.id; |
964 | scpd_area->last_chpid = chpid.id; | |
9d92a7e1 CH |
965 | scpd_area->m = m; |
966 | scpd_area->c = c; | |
967 | scpd_area->fmt = fmt; | |
968 | scpd_area->rfmt = rfmt; | |
1da177e4 LT |
969 | |
970 | ccode = chsc(scpd_area); | |
906c9768 SO |
971 | if (ccode > 0) |
972 | return (ccode == 3) ? -ENODEV : -EBUSY; | |
1da177e4 | 973 | |
b9c9a21a | 974 | ret = chsc_error_from_response(scpd_area->response.code); |
906c9768 | 975 | if (ret) |
b9c9a21a | 976 | CIO_CRW_EVENT(2, "chsc: scpd failed (rc=%04x)\n", |
1da177e4 | 977 | scpd_area->response.code); |
1da177e4 LT |
978 | return ret; |
979 | } | |
9d92a7e1 CH |
980 | EXPORT_SYMBOL_GPL(chsc_determine_channel_path_desc); |
981 | ||
ded27d8d SO |
982 | #define chsc_det_chp_desc(FMT, c) \ |
983 | int chsc_determine_fmt##FMT##_channel_path_desc( \ | |
984 | struct chp_id chpid, struct channel_path_desc_fmt##FMT *desc) \ | |
985 | { \ | |
986 | struct chsc_scpd *scpd_area; \ | |
987 | unsigned long flags; \ | |
988 | int ret; \ | |
989 | \ | |
990 | spin_lock_irqsave(&chsc_page_lock, flags); \ | |
991 | scpd_area = chsc_page; \ | |
992 | ret = chsc_determine_channel_path_desc(chpid, 0, FMT, c, 0, \ | |
993 | scpd_area); \ | |
994 | if (ret) \ | |
995 | goto out; \ | |
996 | \ | |
997 | memcpy(desc, scpd_area->data, sizeof(*desc)); \ | |
998 | out: \ | |
999 | spin_unlock_irqrestore(&chsc_page_lock, flags); \ | |
1000 | return ret; \ | |
1001 | } | |
1002 | ||
1003 | chsc_det_chp_desc(0, 0) | |
1004 | chsc_det_chp_desc(1, 1) | |
fcc6dd4b | 1005 | chsc_det_chp_desc(3, 0) |
ce322ccd | 1006 | |
495a5b45 CH |
1007 | static void |
1008 | chsc_initialize_cmg_chars(struct channel_path *chp, u8 cmcv, | |
1009 | struct cmg_chars *chars) | |
1010 | { | |
34196f82 SO |
1011 | int i, mask; |
1012 | ||
34196f82 SO |
1013 | for (i = 0; i < NR_MEASUREMENT_CHARS; i++) { |
1014 | mask = 0x80 >> (i + 3); | |
1015 | if (cmcv & mask) | |
0d9bfe91 | 1016 | chp->cmg_chars.values[i] = chars->values[i]; |
34196f82 | 1017 | else |
0d9bfe91 | 1018 | chp->cmg_chars.values[i] = 0; |
495a5b45 CH |
1019 | } |
1020 | } | |
1021 | ||
e6b6e10a | 1022 | int chsc_get_channel_measurement_chars(struct channel_path *chp) |
495a5b45 | 1023 | { |
d53c51f2 | 1024 | unsigned long flags; |
495a5b45 CH |
1025 | int ccode, ret; |
1026 | ||
1027 | struct { | |
1028 | struct chsc_header request; | |
1029 | u32 : 24; | |
1030 | u32 first_chpid : 8; | |
1031 | u32 : 24; | |
1032 | u32 last_chpid : 8; | |
1033 | u32 zeroes1; | |
1034 | struct chsc_header response; | |
1035 | u32 zeroes2; | |
1036 | u32 not_valid : 1; | |
1037 | u32 shared : 1; | |
1038 | u32 : 22; | |
1039 | u32 chpid : 8; | |
1040 | u32 cmcv : 5; | |
1041 | u32 : 11; | |
1042 | u32 cmgq : 8; | |
1043 | u32 cmg : 8; | |
1044 | u32 zeroes3; | |
1045 | u32 data[NR_MEASUREMENT_CHARS]; | |
ccaabeea | 1046 | } *scmc_area; |
495a5b45 | 1047 | |
61f0bfcf SO |
1048 | chp->shared = -1; |
1049 | chp->cmg = -1; | |
1050 | ||
1051 | if (!css_chsc_characteristics.scmc || !css_chsc_characteristics.secm) | |
0b601373 | 1052 | return -EINVAL; |
61f0bfcf | 1053 | |
d53c51f2 | 1054 | spin_lock_irqsave(&chsc_page_lock, flags); |
34196f82 SO |
1055 | memset(chsc_page, 0, PAGE_SIZE); |
1056 | scmc_area = chsc_page; | |
495a5b45 CH |
1057 | scmc_area->request.length = 0x0010; |
1058 | scmc_area->request.code = 0x0022; | |
f86635fa PO |
1059 | scmc_area->first_chpid = chp->chpid.id; |
1060 | scmc_area->last_chpid = chp->chpid.id; | |
495a5b45 CH |
1061 | |
1062 | ccode = chsc(scmc_area); | |
1063 | if (ccode > 0) { | |
1064 | ret = (ccode == 3) ? -ENODEV : -EBUSY; | |
1065 | goto out; | |
1066 | } | |
1067 | ||
b9c9a21a | 1068 | ret = chsc_error_from_response(scmc_area->response.code); |
34196f82 | 1069 | if (ret) { |
b9c9a21a | 1070 | CIO_CRW_EVENT(2, "chsc: scmc failed (rc=%04x)\n", |
495a5b45 | 1071 | scmc_area->response.code); |
34196f82 SO |
1072 | goto out; |
1073 | } | |
61f0bfcf | 1074 | if (scmc_area->not_valid) |
34196f82 | 1075 | goto out; |
61f0bfcf | 1076 | |
34196f82 SO |
1077 | chp->cmg = scmc_area->cmg; |
1078 | chp->shared = scmc_area->shared; | |
1079 | if (chp->cmg != 2 && chp->cmg != 3) { | |
1080 | /* No cmg-dependent data. */ | |
1081 | goto out; | |
495a5b45 | 1082 | } |
34196f82 SO |
1083 | chsc_initialize_cmg_chars(chp, scmc_area->cmcv, |
1084 | (struct cmg_chars *) &scmc_area->data); | |
495a5b45 | 1085 | out: |
d53c51f2 | 1086 | spin_unlock_irqrestore(&chsc_page_lock, flags); |
495a5b45 CH |
1087 | return ret; |
1088 | } | |
1089 | ||
34aec07c | 1090 | int __init chsc_init(void) |
1da177e4 | 1091 | { |
c1156189 CH |
1092 | int ret; |
1093 | ||
1da177e4 | 1094 | sei_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
34196f82 SO |
1095 | chsc_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
1096 | if (!sei_page || !chsc_page) { | |
1097 | ret = -ENOMEM; | |
1098 | goto out_err; | |
c1156189 | 1099 | } |
f5daba1d | 1100 | ret = crw_register_handler(CRW_RSC_CSS, chsc_process_crw); |
c1156189 | 1101 | if (ret) |
34196f82 SO |
1102 | goto out_err; |
1103 | return ret; | |
1104 | out_err: | |
1105 | free_page((unsigned long)chsc_page); | |
1106 | free_page((unsigned long)sei_page); | |
c1156189 | 1107 | return ret; |
1da177e4 LT |
1108 | } |
1109 | ||
34aec07c | 1110 | void __init chsc_init_cleanup(void) |
4434a38c | 1111 | { |
f5daba1d | 1112 | crw_unregister_handler(CRW_RSC_CSS); |
34196f82 | 1113 | free_page((unsigned long)chsc_page); |
34aec07c | 1114 | free_page((unsigned long)sei_page); |
4434a38c CH |
1115 | } |
1116 | ||
18e22a17 | 1117 | int __chsc_enable_facility(struct chsc_sda_area *sda_area, int operation_code) |
fb6958a5 CH |
1118 | { |
1119 | int ret; | |
fb6958a5 | 1120 | |
34196f82 SO |
1121 | sda_area->request.length = 0x0400; |
1122 | sda_area->request.code = 0x0031; | |
1123 | sda_area->operation_code = operation_code; | |
fb6958a5 | 1124 | |
34196f82 | 1125 | ret = chsc(sda_area); |
fb6958a5 CH |
1126 | if (ret > 0) { |
1127 | ret = (ret == 3) ? -ENODEV : -EBUSY; | |
1128 | goto out; | |
1129 | } | |
b9c9a21a | 1130 | |
34196f82 | 1131 | switch (sda_area->response.code) { |
b9c9a21a | 1132 | case 0x0101: |
fb6958a5 CH |
1133 | ret = -EOPNOTSUPP; |
1134 | break; | |
b9c9a21a | 1135 | default: |
34196f82 | 1136 | ret = chsc_error_from_response(sda_area->response.code); |
fb6958a5 | 1137 | } |
18e22a17 SO |
1138 | out: |
1139 | return ret; | |
1140 | } | |
1141 | ||
1142 | int chsc_enable_facility(int operation_code) | |
1143 | { | |
1144 | struct chsc_sda_area *sda_area; | |
1145 | unsigned long flags; | |
1146 | int ret; | |
1147 | ||
1148 | spin_lock_irqsave(&chsc_page_lock, flags); | |
1149 | memset(chsc_page, 0, PAGE_SIZE); | |
1150 | sda_area = chsc_page; | |
1151 | ||
1152 | ret = __chsc_enable_facility(sda_area, operation_code); | |
b9c9a21a CH |
1153 | if (ret != 0) |
1154 | CIO_CRW_EVENT(2, "chsc: sda (oc=%x) failed (rc=%04x)\n", | |
34196f82 | 1155 | operation_code, sda_area->response.code); |
18e22a17 | 1156 | |
34196f82 | 1157 | spin_unlock_irqrestore(&chsc_page_lock, flags); |
fb6958a5 CH |
1158 | return ret; |
1159 | } | |
1160 | ||
b983aa1f | 1161 | int __init chsc_get_cssid_iid(int idx, u8 *cssid, u8 *iid) |
e2e0de9b SO |
1162 | { |
1163 | struct { | |
1164 | struct chsc_header request; | |
1165 | u8 atype; | |
1166 | u32 : 24; | |
1167 | u32 reserved1[6]; | |
1168 | struct chsc_header response; | |
1169 | u32 reserved2[3]; | |
1170 | struct { | |
1171 | u8 cssid; | |
b983aa1f AW |
1172 | u8 iid; |
1173 | u32 : 16; | |
e2e0de9b | 1174 | } list[0]; |
ccaabeea | 1175 | } *sdcal_area; |
e2e0de9b SO |
1176 | int ret; |
1177 | ||
1178 | spin_lock_irq(&chsc_page_lock); | |
1179 | memset(chsc_page, 0, PAGE_SIZE); | |
1180 | sdcal_area = chsc_page; | |
1181 | sdcal_area->request.length = 0x0020; | |
1182 | sdcal_area->request.code = 0x0034; | |
1183 | sdcal_area->atype = 4; | |
1184 | ||
1185 | ret = chsc(sdcal_area); | |
1186 | if (ret) { | |
1187 | ret = (ret == 3) ? -ENODEV : -EBUSY; | |
1188 | goto exit; | |
1189 | } | |
1190 | ||
1191 | ret = chsc_error_from_response(sdcal_area->response.code); | |
1192 | if (ret) { | |
1193 | CIO_CRW_EVENT(2, "chsc: sdcal failed (rc=%04x)\n", | |
1194 | sdcal_area->response.code); | |
1195 | goto exit; | |
1196 | } | |
1197 | ||
1198 | if ((addr_t) &sdcal_area->list[idx] < | |
b983aa1f AW |
1199 | (addr_t) &sdcal_area->response + sdcal_area->response.length) { |
1200 | *cssid = sdcal_area->list[idx].cssid; | |
1201 | *iid = sdcal_area->list[idx].iid; | |
1202 | } | |
e2e0de9b SO |
1203 | else |
1204 | ret = -ENODEV; | |
1205 | exit: | |
1206 | spin_unlock_irq(&chsc_page_lock); | |
1207 | return ret; | |
1208 | } | |
1209 | ||
1da177e4 LT |
1210 | struct css_general_char css_general_characteristics; |
1211 | struct css_chsc_char css_chsc_characteristics; | |
1212 | ||
1213 | int __init | |
1214 | chsc_determine_css_characteristics(void) | |
1215 | { | |
d53c51f2 | 1216 | unsigned long flags; |
1da177e4 LT |
1217 | int result; |
1218 | struct { | |
1219 | struct chsc_header request; | |
1220 | u32 reserved1; | |
1221 | u32 reserved2; | |
1222 | u32 reserved3; | |
1223 | struct chsc_header response; | |
1224 | u32 reserved4; | |
1225 | u32 general_char[510]; | |
34aec07c | 1226 | u32 chsc_char[508]; |
ccaabeea | 1227 | } *scsc_area; |
1da177e4 | 1228 | |
d53c51f2 | 1229 | spin_lock_irqsave(&chsc_page_lock, flags); |
34196f82 SO |
1230 | memset(chsc_page, 0, PAGE_SIZE); |
1231 | scsc_area = chsc_page; | |
495a5b45 CH |
1232 | scsc_area->request.length = 0x0010; |
1233 | scsc_area->request.code = 0x0010; | |
1da177e4 LT |
1234 | |
1235 | result = chsc(scsc_area); | |
1236 | if (result) { | |
b9c9a21a | 1237 | result = (result == 3) ? -ENODEV : -EBUSY; |
1da177e4 LT |
1238 | goto exit; |
1239 | } | |
1240 | ||
b9c9a21a CH |
1241 | result = chsc_error_from_response(scsc_area->response.code); |
1242 | if (result == 0) { | |
1243 | memcpy(&css_general_characteristics, scsc_area->general_char, | |
1244 | sizeof(css_general_characteristics)); | |
1245 | memcpy(&css_chsc_characteristics, scsc_area->chsc_char, | |
1246 | sizeof(css_chsc_characteristics)); | |
1247 | } else | |
1248 | CIO_CRW_EVENT(2, "chsc: scsc failed (rc=%04x)\n", | |
1249 | scsc_area->response.code); | |
1da177e4 | 1250 | exit: |
d53c51f2 | 1251 | spin_unlock_irqrestore(&chsc_page_lock, flags); |
1da177e4 LT |
1252 | return result; |
1253 | } | |
1254 | ||
1255 | EXPORT_SYMBOL_GPL(css_general_characteristics); | |
1256 | EXPORT_SYMBOL_GPL(css_chsc_characteristics); | |
d2fec595 | 1257 | |
5ace65eb | 1258 | int chsc_sstpc(void *page, unsigned int op, u16 ctrl, long *clock_delta) |
d2fec595 MS |
1259 | { |
1260 | struct { | |
1261 | struct chsc_header request; | |
1262 | unsigned int rsvd0; | |
1263 | unsigned int op : 8; | |
1264 | unsigned int rsvd1 : 8; | |
1265 | unsigned int ctrl : 16; | |
1266 | unsigned int rsvd2[5]; | |
1267 | struct chsc_header response; | |
2f82f577 | 1268 | unsigned int rsvd3[3]; |
5ace65eb | 1269 | s64 clock_delta; |
2f82f577 | 1270 | unsigned int rsvd4[2]; |
ccaabeea | 1271 | } *rr; |
d2fec595 MS |
1272 | int rc; |
1273 | ||
1274 | memset(page, 0, PAGE_SIZE); | |
1275 | rr = page; | |
1276 | rr->request.length = 0x0020; | |
1277 | rr->request.code = 0x0033; | |
1278 | rr->op = op; | |
1279 | rr->ctrl = ctrl; | |
1280 | rc = chsc(rr); | |
1281 | if (rc) | |
1282 | return -EIO; | |
1283 | rc = (rr->response.code == 0x0001) ? 0 : -EIO; | |
2f82f577 MS |
1284 | if (clock_delta) |
1285 | *clock_delta = rr->clock_delta; | |
d2fec595 MS |
1286 | return rc; |
1287 | } | |
1288 | ||
1289 | int chsc_sstpi(void *page, void *result, size_t size) | |
1290 | { | |
1291 | struct { | |
1292 | struct chsc_header request; | |
1293 | unsigned int rsvd0[3]; | |
1294 | struct chsc_header response; | |
9fbd5a09 | 1295 | char data[]; |
ccaabeea | 1296 | } *rr; |
d2fec595 MS |
1297 | int rc; |
1298 | ||
1299 | memset(page, 0, PAGE_SIZE); | |
1300 | rr = page; | |
1301 | rr->request.length = 0x0010; | |
1302 | rr->request.code = 0x0038; | |
1303 | rc = chsc(rr); | |
1304 | if (rc) | |
1305 | return -EIO; | |
1306 | memcpy(result, &rr->data, size); | |
1307 | return (rr->response.code == 0x0001) ? 0 : -EIO; | |
1308 | } | |
1309 | ||
b2539aa0 SS |
1310 | int chsc_stzi(void *page, void *result, size_t size) |
1311 | { | |
1312 | struct { | |
1313 | struct chsc_header request; | |
1314 | unsigned int rsvd0[3]; | |
1315 | struct chsc_header response; | |
1316 | char data[]; | |
1317 | } *rr; | |
1318 | int rc; | |
1319 | ||
1320 | memset(page, 0, PAGE_SIZE); | |
1321 | rr = page; | |
1322 | rr->request.length = 0x0010; | |
1323 | rr->request.code = 0x003e; | |
1324 | rc = chsc(rr); | |
1325 | if (rc) | |
1326 | return -EIO; | |
1327 | memcpy(result, &rr->data, size); | |
1328 | return (rr->response.code == 0x0001) ? 0 : -EIO; | |
1329 | } | |
1330 | ||
fd0457a6 ME |
1331 | int chsc_siosl(struct subchannel_id schid) |
1332 | { | |
34196f82 SO |
1333 | struct { |
1334 | struct chsc_header request; | |
1335 | u32 word1; | |
1336 | struct subchannel_id sid; | |
1337 | u32 word3; | |
1338 | struct chsc_header response; | |
1339 | u32 word[11]; | |
ccaabeea | 1340 | } *siosl_area; |
fd0457a6 ME |
1341 | unsigned long flags; |
1342 | int ccode; | |
1343 | int rc; | |
1344 | ||
34196f82 SO |
1345 | spin_lock_irqsave(&chsc_page_lock, flags); |
1346 | memset(chsc_page, 0, PAGE_SIZE); | |
1347 | siosl_area = chsc_page; | |
1348 | siosl_area->request.length = 0x0010; | |
1349 | siosl_area->request.code = 0x0046; | |
1350 | siosl_area->word1 = 0x80000000; | |
1351 | siosl_area->sid = schid; | |
fd0457a6 | 1352 | |
34196f82 | 1353 | ccode = chsc(siosl_area); |
fd0457a6 ME |
1354 | if (ccode > 0) { |
1355 | if (ccode == 3) | |
1356 | rc = -ENODEV; | |
1357 | else | |
1358 | rc = -EBUSY; | |
1359 | CIO_MSG_EVENT(2, "chsc: chsc failed for 0.%x.%04x (ccode=%d)\n", | |
1360 | schid.ssid, schid.sch_no, ccode); | |
1361 | goto out; | |
1362 | } | |
34196f82 | 1363 | rc = chsc_error_from_response(siosl_area->response.code); |
fd0457a6 ME |
1364 | if (rc) |
1365 | CIO_MSG_EVENT(2, "chsc: siosl failed for 0.%x.%04x (rc=%04x)\n", | |
1366 | schid.ssid, schid.sch_no, | |
34196f82 | 1367 | siosl_area->response.code); |
fd0457a6 ME |
1368 | else |
1369 | CIO_MSG_EVENT(4, "chsc: siosl succeeded for 0.%x.%04x\n", | |
1370 | schid.ssid, schid.sch_no); | |
1371 | out: | |
34196f82 | 1372 | spin_unlock_irqrestore(&chsc_page_lock, flags); |
fd0457a6 ME |
1373 | return rc; |
1374 | } | |
1375 | EXPORT_SYMBOL_GPL(chsc_siosl); | |
184b08af SO |
1376 | |
1377 | /** | |
1378 | * chsc_scm_info() - store SCM information (SSI) | |
1379 | * @scm_area: request and response block for SSI | |
1380 | * @token: continuation token | |
1381 | * | |
1382 | * Returns 0 on success. | |
1383 | */ | |
1384 | int chsc_scm_info(struct chsc_scm_info *scm_area, u64 token) | |
1385 | { | |
1386 | int ccode, ret; | |
1387 | ||
1388 | memset(scm_area, 0, sizeof(*scm_area)); | |
1389 | scm_area->request.length = 0x0020; | |
1390 | scm_area->request.code = 0x004C; | |
1391 | scm_area->reqtok = token; | |
1392 | ||
1393 | ccode = chsc(scm_area); | |
1394 | if (ccode > 0) { | |
1395 | ret = (ccode == 3) ? -ENODEV : -EBUSY; | |
1396 | goto out; | |
1397 | } | |
1398 | ret = chsc_error_from_response(scm_area->response.code); | |
1399 | if (ret != 0) | |
1400 | CIO_MSG_EVENT(2, "chsc: scm info failed (rc=%04x)\n", | |
1401 | scm_area->response.code); | |
1402 | out: | |
1403 | return ret; | |
1404 | } | |
1405 | EXPORT_SYMBOL_GPL(chsc_scm_info); | |
1c59a861 EC |
1406 | |
1407 | /** | |
a0138f59 | 1408 | * chsc_pnso() - Perform Network-Subchannel Operation |
1c59a861 | 1409 | * @schid: id of the subchannel on which PNSO is performed |
a0138f59 | 1410 | * @pnso_area: request and response block for the operation |
4fea49a7 | 1411 | * @oc: Operation Code |
1c59a861 EC |
1412 | * @resume_token: resume token for multiblock response |
1413 | * @cnc: Boolean change-notification control | |
1414 | * | |
a0138f59 | 1415 | * pnso_area must be allocated by the caller with get_zeroed_page(GFP_KERNEL) |
1c59a861 EC |
1416 | * |
1417 | * Returns 0 on success. | |
1418 | */ | |
4fea49a7 AW |
1419 | int chsc_pnso(struct subchannel_id schid, struct chsc_pnso_area *pnso_area, |
1420 | u8 oc, struct chsc_pnso_resume_token resume_token, int cnc) | |
1c59a861 | 1421 | { |
a0138f59 AW |
1422 | memset(pnso_area, 0, sizeof(*pnso_area)); |
1423 | pnso_area->request.length = 0x0030; | |
1424 | pnso_area->request.code = 0x003d; /* network-subchannel operation */ | |
1425 | pnso_area->m = schid.m; | |
1426 | pnso_area->ssid = schid.ssid; | |
1427 | pnso_area->sch = schid.sch_no; | |
1428 | pnso_area->cssid = schid.cssid; | |
4fea49a7 | 1429 | pnso_area->oc = oc; |
a0138f59 AW |
1430 | pnso_area->resume_token = resume_token; |
1431 | pnso_area->n = (cnc != 0); | |
1432 | if (chsc(pnso_area)) | |
1c59a861 | 1433 | return -EIO; |
a0138f59 | 1434 | return chsc_error_from_response(pnso_area->response.code); |
1c59a861 | 1435 | } |
3dec1922 MM |
1436 | |
1437 | int chsc_sgib(u32 origin) | |
1438 | { | |
1439 | struct { | |
1440 | struct chsc_header request; | |
1441 | u16 op; | |
1442 | u8 reserved01[2]; | |
1443 | u8 reserved02:4; | |
1444 | u8 fmt:4; | |
1445 | u8 reserved03[7]; | |
1446 | /* operation data area begin */ | |
1447 | u8 reserved04[4]; | |
1448 | u32 gib_origin; | |
1449 | u8 reserved05[10]; | |
1450 | u8 aix; | |
1451 | u8 reserved06[4029]; | |
1452 | struct chsc_header response; | |
1453 | u8 reserved07[4]; | |
1454 | } *sgib_area; | |
1455 | int ret; | |
1456 | ||
1457 | spin_lock_irq(&chsc_page_lock); | |
1458 | memset(chsc_page, 0, PAGE_SIZE); | |
1459 | sgib_area = chsc_page; | |
1460 | sgib_area->request.length = 0x0fe0; | |
1461 | sgib_area->request.code = 0x0021; | |
1462 | sgib_area->op = 0x1; | |
1463 | sgib_area->gib_origin = origin; | |
1464 | ||
1465 | ret = chsc(sgib_area); | |
1466 | if (ret == 0) | |
1467 | ret = chsc_error_from_response(sgib_area->response.code); | |
1468 | spin_unlock_irq(&chsc_page_lock); | |
1469 | ||
1470 | return ret; | |
1471 | } | |
1472 | EXPORT_SYMBOL_GPL(chsc_sgib); | |
4cd6094d VV |
1473 | |
1474 | #define SCUD_REQ_LEN 0x10 /* SCUD request block length */ | |
1475 | #define SCUD_REQ_CMD 0x4b /* SCUD Command Code */ | |
1476 | ||
1477 | struct chse_cudb { | |
1478 | u16 flags:8; | |
1479 | u16 chp_valid:8; | |
1480 | u16 cu; | |
1481 | u32 esm_valid:8; | |
1482 | u32:24; | |
1483 | u8 chpid[8]; | |
1484 | u32:32; | |
1485 | u32:32; | |
1486 | u8 esm[8]; | |
1487 | u32 efla[8]; | |
1488 | } __packed; | |
1489 | ||
1490 | struct chsc_scud { | |
1491 | struct chsc_header request; | |
1492 | u16:4; | |
1493 | u16 fmt:4; | |
1494 | u16 cssid:8; | |
1495 | u16 first_cu; | |
1496 | u16:16; | |
1497 | u16 last_cu; | |
1498 | u32:32; | |
1499 | struct chsc_header response; | |
1500 | u16:4; | |
1501 | u16 fmt_resp:4; | |
1502 | u32:24; | |
1503 | struct chse_cudb cudb[]; | |
1504 | } __packed; | |
1505 | ||
1506 | /** | |
1507 | * chsc_scud() - Store control-unit description. | |
1508 | * @cu: number of the control-unit | |
1509 | * @esm: 8 1-byte endpoint security mode values | |
1510 | * @esm_valid: validity mask for @esm | |
1511 | * | |
1512 | * Interface to retrieve information about the endpoint security | |
1513 | * modes for up to 8 paths of a control unit. | |
1514 | * | |
1515 | * Returns 0 on success. | |
1516 | */ | |
1517 | int chsc_scud(u16 cu, u64 *esm, u8 *esm_valid) | |
1518 | { | |
1519 | struct chsc_scud *scud = chsc_page; | |
1520 | int ret; | |
1521 | ||
1522 | spin_lock_irq(&chsc_page_lock); | |
1523 | memset(chsc_page, 0, PAGE_SIZE); | |
1524 | scud->request.length = SCUD_REQ_LEN; | |
1525 | scud->request.code = SCUD_REQ_CMD; | |
1526 | scud->fmt = 0; | |
1527 | scud->cssid = 0; | |
1528 | scud->first_cu = cu; | |
1529 | scud->last_cu = cu; | |
1530 | ||
1531 | ret = chsc(scud); | |
1532 | if (!ret) | |
1533 | ret = chsc_error_from_response(scud->response.code); | |
1534 | ||
1535 | if (!ret && (scud->response.length <= 8 || scud->fmt_resp != 0 | |
1536 | || !(scud->cudb[0].flags & 0x80) | |
1537 | || scud->cudb[0].cu != cu)) { | |
1538 | ||
1539 | CIO_MSG_EVENT(2, "chsc: scud failed rc=%04x, L2=%04x " | |
1540 | "FMT=%04x, cudb.flags=%02x, cudb.cu=%04x", | |
1541 | scud->response.code, scud->response.length, | |
1542 | scud->fmt_resp, scud->cudb[0].flags, scud->cudb[0].cu); | |
1543 | ret = -EINVAL; | |
1544 | } | |
1545 | ||
1546 | if (ret) | |
1547 | goto out; | |
1548 | ||
1549 | memcpy(esm, scud->cudb[0].esm, sizeof(*esm)); | |
1550 | *esm_valid = scud->cudb[0].esm_valid; | |
1551 | out: | |
1552 | spin_unlock_irq(&chsc_page_lock); | |
1553 | return ret; | |
1554 | } | |
1555 | EXPORT_SYMBOL_GPL(chsc_scud); |