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