blob: eb5f1b8bc57fd0546c94067a5b57364f3db1addf [file] [log] [blame]
Heiko Carstens08d07962008-01-26 14:10:56 +01001/*
2 * drivers/s390/char/sclp_cmd.c
3 *
4 * Copyright IBM Corp. 2007
Heiko Carstens4b28a8f2008-01-26 14:10:57 +01005 * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>,
6 * Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Heiko Carstens08d07962008-01-26 14:10:56 +01007 */
8
9#include <linux/completion.h>
10#include <linux/init.h>
11#include <linux/errno.h>
12#include <linux/slab.h>
13#include <linux/string.h>
Heiko Carstense0bc2492008-07-14 09:59:19 +020014#include <linux/mm.h>
15#include <linux/mmzone.h>
16#include <linux/memory.h>
Heiko Carstens4b28a8f2008-01-26 14:10:57 +010017#include <asm/chpid.h>
Heiko Carstens08d07962008-01-26 14:10:56 +010018#include <asm/sclp.h>
19#include "sclp.h"
20
21#define TAG "sclp_cmd: "
22
23#define SCLP_CMDW_READ_SCP_INFO 0x00020001
24#define SCLP_CMDW_READ_SCP_INFO_FORCED 0x00120001
25
26struct read_info_sccb {
27 struct sccb_header header; /* 0-7 */
28 u16 rnmax; /* 8-9 */
29 u8 rnsize; /* 10 */
30 u8 _reserved0[24 - 11]; /* 11-15 */
31 u8 loadparm[8]; /* 24-31 */
32 u8 _reserved1[48 - 32]; /* 32-47 */
33 u64 facilities; /* 48-55 */
34 u8 _reserved2[84 - 56]; /* 56-83 */
35 u8 fac84; /* 84 */
36 u8 _reserved3[91 - 85]; /* 85-90 */
37 u8 flags; /* 91 */
38 u8 _reserved4[100 - 92]; /* 92-99 */
39 u32 rnsize2; /* 100-103 */
40 u64 rnmax2; /* 104-111 */
41 u8 _reserved5[4096 - 112]; /* 112-4095 */
42} __attribute__((packed, aligned(PAGE_SIZE)));
43
44static struct read_info_sccb __initdata early_read_info_sccb;
45static int __initdata early_read_info_sccb_valid;
46
47u64 sclp_facilities;
48static u8 sclp_fac84;
Heiko Carstense0bc2492008-07-14 09:59:19 +020049static unsigned long long rzm;
50static unsigned long long rnmax;
Heiko Carstens08d07962008-01-26 14:10:56 +010051
52static int __init sclp_cmd_sync_early(sclp_cmdw_t cmd, void *sccb)
53{
54 int rc;
55
56 __ctl_set_bit(0, 9);
57 rc = sclp_service_call(cmd, sccb);
58 if (rc)
59 goto out;
60 __load_psw_mask(PSW_BASE_BITS | PSW_MASK_EXT |
61 PSW_MASK_WAIT | PSW_DEFAULT_KEY);
62 local_irq_disable();
63out:
64 /* Contents of the sccb might have changed. */
65 barrier();
66 __ctl_clear_bit(0, 9);
67 return rc;
68}
69
Heiko Carstens23d17422008-07-14 09:59:21 +020070static void __init sclp_read_info_early(void)
Heiko Carstens08d07962008-01-26 14:10:56 +010071{
72 int rc;
73 int i;
74 struct read_info_sccb *sccb;
75 sclp_cmdw_t commands[] = {SCLP_CMDW_READ_SCP_INFO_FORCED,
76 SCLP_CMDW_READ_SCP_INFO};
77
78 sccb = &early_read_info_sccb;
79 for (i = 0; i < ARRAY_SIZE(commands); i++) {
80 do {
81 memset(sccb, 0, sizeof(*sccb));
82 sccb->header.length = sizeof(*sccb);
83 sccb->header.control_mask[2] = 0x80;
84 rc = sclp_cmd_sync_early(commands[i], sccb);
85 } while (rc == -EBUSY);
86
87 if (rc)
88 break;
89 if (sccb->header.response_code == 0x10) {
90 early_read_info_sccb_valid = 1;
91 break;
92 }
93 if (sccb->header.response_code != 0x1f0)
94 break;
95 }
96}
97
98void __init sclp_facilities_detect(void)
99{
Heiko Carstens08d07962008-01-26 14:10:56 +0100100 struct read_info_sccb *sccb;
101
Heiko Carstens23d17422008-07-14 09:59:21 +0200102 sclp_read_info_early();
Heiko Carstens08d07962008-01-26 14:10:56 +0100103 if (!early_read_info_sccb_valid)
Heiko Carstens23d17422008-07-14 09:59:21 +0200104 return;
105
Heiko Carstens08d07962008-01-26 14:10:56 +0100106 sccb = &early_read_info_sccb;
Heiko Carstens23d17422008-07-14 09:59:21 +0200107 sclp_facilities = sccb->facilities;
108 sclp_fac84 = sccb->fac84;
Heiko Carstense0bc2492008-07-14 09:59:19 +0200109 rnmax = sccb->rnmax ? sccb->rnmax : sccb->rnmax2;
110 rzm = sccb->rnsize ? sccb->rnsize : sccb->rnsize2;
111 rzm <<= 20;
Heiko Carstens23d17422008-07-14 09:59:21 +0200112}
113
114unsigned long long sclp_get_rnmax(void)
115{
116 return rnmax;
117}
118
119unsigned long long sclp_get_rzm(void)
120{
121 return rzm;
Heiko Carstens08d07962008-01-26 14:10:56 +0100122}
123
124/*
Heiko Carstens23d17422008-07-14 09:59:21 +0200125 * This function will be called after sclp_facilities_detect(), which gets
126 * called from early.c code. Therefore the sccb should have valid contents.
Heiko Carstens08d07962008-01-26 14:10:56 +0100127 */
128void __init sclp_get_ipl_info(struct sclp_ipl_info *info)
129{
130 struct read_info_sccb *sccb;
131
132 if (!early_read_info_sccb_valid)
133 return;
134 sccb = &early_read_info_sccb;
135 info->is_valid = 1;
136 if (sccb->flags & 0x2)
137 info->has_dump = 1;
138 memcpy(&info->loadparm, &sccb->loadparm, LOADPARM_LEN);
139}
140
141static void sclp_sync_callback(struct sclp_req *req, void *data)
142{
143 struct completion *completion = data;
144
145 complete(completion);
146}
147
148static int do_sync_request(sclp_cmdw_t cmd, void *sccb)
149{
150 struct completion completion;
151 struct sclp_req *request;
152 int rc;
153
154 request = kzalloc(sizeof(*request), GFP_KERNEL);
155 if (!request)
156 return -ENOMEM;
157 request->command = cmd;
158 request->sccb = sccb;
159 request->status = SCLP_REQ_FILLED;
160 request->callback = sclp_sync_callback;
161 request->callback_data = &completion;
162 init_completion(&completion);
163
164 /* Perform sclp request. */
165 rc = sclp_add_request(request);
166 if (rc)
167 goto out;
168 wait_for_completion(&completion);
169
170 /* Check response. */
171 if (request->status != SCLP_REQ_DONE) {
172 printk(KERN_WARNING TAG "sync request failed "
173 "(cmd=0x%08x, status=0x%02x)\n", cmd, request->status);
174 rc = -EIO;
175 }
176out:
177 kfree(request);
178 return rc;
179}
180
181/*
182 * CPU configuration related functions.
183 */
184
185#define SCLP_CMDW_READ_CPU_INFO 0x00010001
186#define SCLP_CMDW_CONFIGURE_CPU 0x00110001
187#define SCLP_CMDW_DECONFIGURE_CPU 0x00100001
188
189struct read_cpu_info_sccb {
190 struct sccb_header header;
191 u16 nr_configured;
192 u16 offset_configured;
193 u16 nr_standby;
194 u16 offset_standby;
195 u8 reserved[4096 - 16];
196} __attribute__((packed, aligned(PAGE_SIZE)));
197
Heiko Carstens08d07962008-01-26 14:10:56 +0100198static void sclp_fill_cpu_info(struct sclp_cpu_info *info,
199 struct read_cpu_info_sccb *sccb)
200{
201 char *page = (char *) sccb;
202
203 memset(info, 0, sizeof(*info));
204 info->configured = sccb->nr_configured;
205 info->standby = sccb->nr_standby;
206 info->combined = sccb->nr_configured + sccb->nr_standby;
207 info->has_cpu_type = sclp_fac84 & 0x1;
208 memcpy(&info->cpu, page + sccb->offset_configured,
209 info->combined * sizeof(struct sclp_cpu_entry));
210}
211
Heiko Carstens48483b32008-01-26 14:11:05 +0100212int sclp_get_cpu_info(struct sclp_cpu_info *info)
Heiko Carstens08d07962008-01-26 14:10:56 +0100213{
214 int rc;
215 struct read_cpu_info_sccb *sccb;
216
217 if (!SCLP_HAS_CPU_INFO)
218 return -EOPNOTSUPP;
Heiko Carstens48483b32008-01-26 14:11:05 +0100219 sccb = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
Heiko Carstens08d07962008-01-26 14:10:56 +0100220 if (!sccb)
221 return -ENOMEM;
Heiko Carstens08d07962008-01-26 14:10:56 +0100222 sccb->header.length = sizeof(*sccb);
223 rc = do_sync_request(SCLP_CMDW_READ_CPU_INFO, sccb);
224 if (rc)
225 goto out;
226 if (sccb->header.response_code != 0x0010) {
227 printk(KERN_WARNING TAG "readcpuinfo failed "
228 "(response=0x%04x)\n", sccb->header.response_code);
229 rc = -EIO;
230 goto out;
231 }
232 sclp_fill_cpu_info(info, sccb);
233out:
234 free_page((unsigned long) sccb);
235 return rc;
236}
237
Heiko Carstens08d07962008-01-26 14:10:56 +0100238struct cpu_configure_sccb {
239 struct sccb_header header;
240} __attribute__((packed, aligned(8)));
241
242static int do_cpu_configure(sclp_cmdw_t cmd)
243{
244 struct cpu_configure_sccb *sccb;
245 int rc;
246
247 if (!SCLP_HAS_CPU_RECONFIG)
248 return -EOPNOTSUPP;
249 /*
250 * This is not going to cross a page boundary since we force
251 * kmalloc to have a minimum alignment of 8 bytes on s390.
252 */
253 sccb = kzalloc(sizeof(*sccb), GFP_KERNEL | GFP_DMA);
254 if (!sccb)
255 return -ENOMEM;
256 sccb->header.length = sizeof(*sccb);
257 rc = do_sync_request(cmd, sccb);
258 if (rc)
259 goto out;
260 switch (sccb->header.response_code) {
261 case 0x0020:
262 case 0x0120:
263 break;
264 default:
265 printk(KERN_WARNING TAG "configure cpu failed (cmd=0x%08x, "
266 "response=0x%04x)\n", cmd, sccb->header.response_code);
267 rc = -EIO;
268 break;
269 }
270out:
271 kfree(sccb);
272 return rc;
273}
274
275int sclp_cpu_configure(u8 cpu)
276{
277 return do_cpu_configure(SCLP_CMDW_CONFIGURE_CPU | cpu << 8);
278}
279
280int sclp_cpu_deconfigure(u8 cpu)
281{
282 return do_cpu_configure(SCLP_CMDW_DECONFIGURE_CPU | cpu << 8);
283}
Heiko Carstens4b28a8f2008-01-26 14:10:57 +0100284
Heiko Carstense0bc2492008-07-14 09:59:19 +0200285#ifdef CONFIG_MEMORY_HOTPLUG
286
287static DEFINE_MUTEX(sclp_mem_mutex);
288static LIST_HEAD(sclp_mem_list);
289static u8 sclp_max_storage_id;
290static unsigned long sclp_storage_ids[256 / BITS_PER_LONG];
291
292struct memory_increment {
293 struct list_head list;
294 u16 rn;
295 int standby;
296 int usecount;
297};
298
299struct assign_storage_sccb {
300 struct sccb_header header;
301 u16 rn;
302} __packed;
303
304static unsigned long long rn2addr(u16 rn)
305{
306 return (unsigned long long) (rn - 1) * rzm;
307}
308
309static int do_assign_storage(sclp_cmdw_t cmd, u16 rn)
310{
311 struct assign_storage_sccb *sccb;
312 int rc;
313
314 sccb = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
315 if (!sccb)
316 return -ENOMEM;
317 sccb->header.length = PAGE_SIZE;
318 sccb->rn = rn;
319 rc = do_sync_request(cmd, sccb);
320 if (rc)
321 goto out;
322 switch (sccb->header.response_code) {
323 case 0x0020:
324 case 0x0120:
325 break;
326 default:
327 rc = -EIO;
328 break;
329 }
330out:
331 free_page((unsigned long) sccb);
332 return rc;
333}
334
335static int sclp_assign_storage(u16 rn)
336{
337 return do_assign_storage(0x000d0001, rn);
338}
339
340static int sclp_unassign_storage(u16 rn)
341{
342 return do_assign_storage(0x000c0001, rn);
343}
344
345struct attach_storage_sccb {
346 struct sccb_header header;
347 u16 :16;
348 u16 assigned;
349 u32 :32;
350 u32 entries[0];
351} __packed;
352
353static int sclp_attach_storage(u8 id)
354{
355 struct attach_storage_sccb *sccb;
356 int rc;
357 int i;
358
359 sccb = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
360 if (!sccb)
361 return -ENOMEM;
362 sccb->header.length = PAGE_SIZE;
363 rc = do_sync_request(0x00080001 | id << 8, sccb);
364 if (rc)
365 goto out;
366 switch (sccb->header.response_code) {
367 case 0x0020:
368 set_bit(id, sclp_storage_ids);
369 for (i = 0; i < sccb->assigned; i++)
370 sclp_unassign_storage(sccb->entries[i] >> 16);
371 break;
372 default:
373 rc = -EIO;
374 break;
375 }
376out:
377 free_page((unsigned long) sccb);
378 return rc;
379}
380
381static int sclp_mem_change_state(unsigned long start, unsigned long size,
382 int online)
383{
384 struct memory_increment *incr;
385 unsigned long long istart;
386 int rc = 0;
387
388 list_for_each_entry(incr, &sclp_mem_list, list) {
389 istart = rn2addr(incr->rn);
390 if (start + size - 1 < istart)
391 break;
392 if (start > istart + rzm - 1)
393 continue;
394 if (online) {
395 if (incr->usecount++)
396 continue;
397 /*
398 * Don't break the loop if one assign fails. Loop may
399 * be walked again on CANCEL and we can't save
400 * information if state changed before or not.
401 * So continue and increase usecount for all increments.
402 */
403 rc |= sclp_assign_storage(incr->rn);
404 } else {
405 if (--incr->usecount)
406 continue;
407 sclp_unassign_storage(incr->rn);
408 }
409 }
410 return rc ? -EIO : 0;
411}
412
413static int sclp_mem_notifier(struct notifier_block *nb,
414 unsigned long action, void *data)
415{
416 unsigned long start, size;
417 struct memory_notify *arg;
418 unsigned char id;
419 int rc = 0;
420
421 arg = data;
422 start = arg->start_pfn << PAGE_SHIFT;
423 size = arg->nr_pages << PAGE_SHIFT;
424 mutex_lock(&sclp_mem_mutex);
425 for (id = 0; id <= sclp_max_storage_id; id++)
426 if (!test_bit(id, sclp_storage_ids))
427 sclp_attach_storage(id);
428 switch (action) {
429 case MEM_ONLINE:
Gerald Schaefer7e9238f2008-08-01 16:39:16 +0200430 case MEM_GOING_OFFLINE:
431 case MEM_CANCEL_OFFLINE:
Heiko Carstense0bc2492008-07-14 09:59:19 +0200432 break;
433 case MEM_GOING_ONLINE:
434 rc = sclp_mem_change_state(start, size, 1);
435 break;
436 case MEM_CANCEL_ONLINE:
437 sclp_mem_change_state(start, size, 0);
438 break;
Gerald Schaefer7e9238f2008-08-01 16:39:16 +0200439 case MEM_OFFLINE:
440 sclp_mem_change_state(start, size, 0);
441 break;
Heiko Carstense0bc2492008-07-14 09:59:19 +0200442 default:
443 rc = -EINVAL;
444 break;
445 }
446 mutex_unlock(&sclp_mem_mutex);
447 return rc ? NOTIFY_BAD : NOTIFY_OK;
448}
449
450static struct notifier_block sclp_mem_nb = {
451 .notifier_call = sclp_mem_notifier,
452};
453
454static void __init add_memory_merged(u16 rn)
455{
456 static u16 first_rn, num;
457 unsigned long long start, size;
458
459 if (rn && first_rn && (first_rn + num == rn)) {
460 num++;
461 return;
462 }
463 if (!first_rn)
464 goto skip_add;
465 start = rn2addr(first_rn);
466 size = (unsigned long long ) num * rzm;
467 if (start >= VMEM_MAX_PHYS)
468 goto skip_add;
469 if (start + size > VMEM_MAX_PHYS)
470 size = VMEM_MAX_PHYS - start;
471 add_memory(0, start, size);
472skip_add:
473 first_rn = rn;
474 num = 1;
475}
476
477static void __init sclp_add_standby_memory(void)
478{
479 struct memory_increment *incr;
480
481 list_for_each_entry(incr, &sclp_mem_list, list)
482 if (incr->standby)
483 add_memory_merged(incr->rn);
484 add_memory_merged(0);
485}
486
487static void __init insert_increment(u16 rn, int standby, int assigned)
488{
489 struct memory_increment *incr, *new_incr;
490 struct list_head *prev;
491 u16 last_rn;
492
493 new_incr = kzalloc(sizeof(*new_incr), GFP_KERNEL);
494 if (!new_incr)
495 return;
496 new_incr->rn = rn;
497 new_incr->standby = standby;
498 last_rn = 0;
499 prev = &sclp_mem_list;
500 list_for_each_entry(incr, &sclp_mem_list, list) {
501 if (assigned && incr->rn > rn)
502 break;
503 if (!assigned && incr->rn - last_rn > 1)
504 break;
505 last_rn = incr->rn;
506 prev = &incr->list;
507 }
508 if (!assigned)
509 new_incr->rn = last_rn + 1;
510 if (new_incr->rn > rnmax) {
511 kfree(new_incr);
512 return;
513 }
514 list_add(&new_incr->list, prev);
515}
516
517struct read_storage_sccb {
518 struct sccb_header header;
519 u16 max_id;
520 u16 assigned;
521 u16 standby;
522 u16 :16;
523 u32 entries[0];
524} __packed;
525
526static int __init sclp_detect_standby_memory(void)
527{
528 struct read_storage_sccb *sccb;
529 int i, id, assigned, rc;
530
531 if (!early_read_info_sccb_valid)
532 return 0;
533 if ((sclp_facilities & 0xe00000000000ULL) != 0xe00000000000ULL)
534 return 0;
535 rc = -ENOMEM;
536 sccb = (void *) __get_free_page(GFP_KERNEL | GFP_DMA);
537 if (!sccb)
538 goto out;
539 assigned = 0;
540 for (id = 0; id <= sclp_max_storage_id; id++) {
541 memset(sccb, 0, PAGE_SIZE);
542 sccb->header.length = PAGE_SIZE;
543 rc = do_sync_request(0x00040001 | id << 8, sccb);
544 if (rc)
545 goto out;
546 switch (sccb->header.response_code) {
547 case 0x0010:
548 set_bit(id, sclp_storage_ids);
549 for (i = 0; i < sccb->assigned; i++) {
550 if (!sccb->entries[i])
551 continue;
552 assigned++;
553 insert_increment(sccb->entries[i] >> 16, 0, 1);
554 }
555 break;
556 case 0x0310:
557 break;
558 case 0x0410:
559 for (i = 0; i < sccb->assigned; i++) {
560 if (!sccb->entries[i])
561 continue;
562 assigned++;
563 insert_increment(sccb->entries[i] >> 16, 1, 1);
564 }
565 break;
566 default:
567 rc = -EIO;
568 break;
569 }
570 if (!rc)
571 sclp_max_storage_id = sccb->max_id;
572 }
573 if (rc || list_empty(&sclp_mem_list))
574 goto out;
575 for (i = 1; i <= rnmax - assigned; i++)
576 insert_increment(0, 1, 0);
577 rc = register_memory_notifier(&sclp_mem_nb);
578 if (rc)
579 goto out;
580 sclp_add_standby_memory();
581out:
582 free_page((unsigned long) sccb);
583 return rc;
584}
585__initcall(sclp_detect_standby_memory);
586
587#endif /* CONFIG_MEMORY_HOTPLUG */
588
Heiko Carstens4b28a8f2008-01-26 14:10:57 +0100589/*
590 * Channel path configuration related functions.
591 */
592
593#define SCLP_CMDW_CONFIGURE_CHPATH 0x000f0001
594#define SCLP_CMDW_DECONFIGURE_CHPATH 0x000e0001
595#define SCLP_CMDW_READ_CHPATH_INFORMATION 0x00030001
596
597struct chp_cfg_sccb {
598 struct sccb_header header;
599 u8 ccm;
600 u8 reserved[6];
601 u8 cssid;
602} __attribute__((packed));
603
604static int do_chp_configure(sclp_cmdw_t cmd)
605{
606 struct chp_cfg_sccb *sccb;
607 int rc;
608
609 if (!SCLP_HAS_CHP_RECONFIG)
610 return -EOPNOTSUPP;
611 /* Prepare sccb. */
612 sccb = (struct chp_cfg_sccb *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
613 if (!sccb)
614 return -ENOMEM;
615 sccb->header.length = sizeof(*sccb);
616 rc = do_sync_request(cmd, sccb);
617 if (rc)
618 goto out;
619 switch (sccb->header.response_code) {
620 case 0x0020:
621 case 0x0120:
622 case 0x0440:
623 case 0x0450:
624 break;
625 default:
626 printk(KERN_WARNING TAG "configure channel-path failed "
627 "(cmd=0x%08x, response=0x%04x)\n", cmd,
628 sccb->header.response_code);
629 rc = -EIO;
630 break;
631 }
632out:
633 free_page((unsigned long) sccb);
634 return rc;
635}
636
637/**
638 * sclp_chp_configure - perform configure channel-path sclp command
639 * @chpid: channel-path ID
640 *
641 * Perform configure channel-path command sclp command for specified chpid.
642 * Return 0 after command successfully finished, non-zero otherwise.
643 */
644int sclp_chp_configure(struct chp_id chpid)
645{
646 return do_chp_configure(SCLP_CMDW_CONFIGURE_CHPATH | chpid.id << 8);
647}
648
649/**
650 * sclp_chp_deconfigure - perform deconfigure channel-path sclp command
651 * @chpid: channel-path ID
652 *
653 * Perform deconfigure channel-path command sclp command for specified chpid
654 * and wait for completion. On success return 0. Return non-zero otherwise.
655 */
656int sclp_chp_deconfigure(struct chp_id chpid)
657{
658 return do_chp_configure(SCLP_CMDW_DECONFIGURE_CHPATH | chpid.id << 8);
659}
660
661struct chp_info_sccb {
662 struct sccb_header header;
663 u8 recognized[SCLP_CHP_INFO_MASK_SIZE];
664 u8 standby[SCLP_CHP_INFO_MASK_SIZE];
665 u8 configured[SCLP_CHP_INFO_MASK_SIZE];
666 u8 ccm;
667 u8 reserved[6];
668 u8 cssid;
669} __attribute__((packed));
670
671/**
672 * sclp_chp_read_info - perform read channel-path information sclp command
673 * @info: resulting channel-path information data
674 *
675 * Perform read channel-path information sclp command and wait for completion.
676 * On success, store channel-path information in @info and return 0. Return
677 * non-zero otherwise.
678 */
679int sclp_chp_read_info(struct sclp_chp_info *info)
680{
681 struct chp_info_sccb *sccb;
682 int rc;
683
684 if (!SCLP_HAS_CHP_INFO)
685 return -EOPNOTSUPP;
686 /* Prepare sccb. */
687 sccb = (struct chp_info_sccb *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
688 if (!sccb)
689 return -ENOMEM;
690 sccb->header.length = sizeof(*sccb);
691 rc = do_sync_request(SCLP_CMDW_READ_CHPATH_INFORMATION, sccb);
692 if (rc)
693 goto out;
694 if (sccb->header.response_code != 0x0010) {
695 printk(KERN_WARNING TAG "read channel-path info failed "
696 "(response=0x%04x)\n", sccb->header.response_code);
697 rc = -EIO;
698 goto out;
699 }
700 memcpy(info->recognized, sccb->recognized, SCLP_CHP_INFO_MASK_SIZE);
701 memcpy(info->standby, sccb->standby, SCLP_CHP_INFO_MASK_SIZE);
702 memcpy(info->configured, sccb->configured, SCLP_CHP_INFO_MASK_SIZE);
703out:
704 free_page((unsigned long) sccb);
705 return rc;
706}