1 /* 2 * Copyright IBM Corp. 2007, 2009 3 * 4 * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>, 5 * Peter Oberparleiter <peter.oberparleiter@de.ibm.com> 6 */ 7 8 #define KMSG_COMPONENT "sclp_cmd" 9 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt 10 11 #include <linux/completion.h> 12 #include <linux/init.h> 13 #include <linux/errno.h> 14 #include <linux/err.h> 15 #include <linux/slab.h> 16 #include <linux/string.h> 17 #include <linux/mm.h> 18 #include <linux/mmzone.h> 19 #include <linux/memory.h> 20 #include <linux/platform_device.h> 21 #include <asm/chpid.h> 22 #include <asm/sclp.h> 23 #include <asm/setup.h> 24 25 #include "sclp.h" 26 27 #define SCLP_CMDW_READ_SCP_INFO 0x00020001 28 #define SCLP_CMDW_READ_SCP_INFO_FORCED 0x00120001 29 30 struct read_info_sccb { 31 struct sccb_header header; /* 0-7 */ 32 u16 rnmax; /* 8-9 */ 33 u8 rnsize; /* 10 */ 34 u8 _reserved0[24 - 11]; /* 11-15 */ 35 u8 loadparm[8]; /* 24-31 */ 36 u8 _reserved1[48 - 32]; /* 32-47 */ 37 u64 facilities; /* 48-55 */ 38 u8 _reserved2[84 - 56]; /* 56-83 */ 39 u8 fac84; /* 84 */ 40 u8 _reserved3[91 - 85]; /* 85-90 */ 41 u8 flags; /* 91 */ 42 u8 _reserved4[100 - 92]; /* 92-99 */ 43 u32 rnsize2; /* 100-103 */ 44 u64 rnmax2; /* 104-111 */ 45 u8 _reserved5[4096 - 112]; /* 112-4095 */ 46 } __attribute__((packed, aligned(PAGE_SIZE))); 47 48 static struct read_info_sccb __initdata early_read_info_sccb; 49 static int __initdata early_read_info_sccb_valid; 50 51 u64 sclp_facilities; 52 static u8 sclp_fac84; 53 static unsigned long long rzm; 54 static unsigned long long rnmax; 55 56 static int __init sclp_cmd_sync_early(sclp_cmdw_t cmd, void *sccb) 57 { 58 int rc; 59 60 __ctl_set_bit(0, 9); 61 rc = sclp_service_call(cmd, sccb); 62 if (rc) 63 goto out; 64 __load_psw_mask(PSW_BASE_BITS | PSW_MASK_EXT | 65 PSW_MASK_WAIT | PSW_DEFAULT_KEY); 66 local_irq_disable(); 67 out: 68 /* Contents of the sccb might have changed. */ 69 barrier(); 70 __ctl_clear_bit(0, 9); 71 return rc; 72 } 73 74 static void __init sclp_read_info_early(void) 75 { 76 int rc; 77 int i; 78 struct read_info_sccb *sccb; 79 sclp_cmdw_t commands[] = {SCLP_CMDW_READ_SCP_INFO_FORCED, 80 SCLP_CMDW_READ_SCP_INFO}; 81 82 sccb = &early_read_info_sccb; 83 for (i = 0; i < ARRAY_SIZE(commands); i++) { 84 do { 85 memset(sccb, 0, sizeof(*sccb)); 86 sccb->header.length = sizeof(*sccb); 87 sccb->header.control_mask[2] = 0x80; 88 rc = sclp_cmd_sync_early(commands[i], sccb); 89 } while (rc == -EBUSY); 90 91 if (rc) 92 break; 93 if (sccb->header.response_code == 0x10) { 94 early_read_info_sccb_valid = 1; 95 break; 96 } 97 if (sccb->header.response_code != 0x1f0) 98 break; 99 } 100 } 101 102 void __init sclp_facilities_detect(void) 103 { 104 struct read_info_sccb *sccb; 105 106 sclp_read_info_early(); 107 if (!early_read_info_sccb_valid) 108 return; 109 110 sccb = &early_read_info_sccb; 111 sclp_facilities = sccb->facilities; 112 sclp_fac84 = sccb->fac84; 113 rnmax = sccb->rnmax ? sccb->rnmax : sccb->rnmax2; 114 rzm = sccb->rnsize ? sccb->rnsize : sccb->rnsize2; 115 rzm <<= 20; 116 } 117 118 unsigned long long sclp_get_rnmax(void) 119 { 120 return rnmax; 121 } 122 123 unsigned long long sclp_get_rzm(void) 124 { 125 return rzm; 126 } 127 128 /* 129 * This function will be called after sclp_facilities_detect(), which gets 130 * called from early.c code. Therefore the sccb should have valid contents. 131 */ 132 void __init sclp_get_ipl_info(struct sclp_ipl_info *info) 133 { 134 struct read_info_sccb *sccb; 135 136 if (!early_read_info_sccb_valid) 137 return; 138 sccb = &early_read_info_sccb; 139 info->is_valid = 1; 140 if (sccb->flags & 0x2) 141 info->has_dump = 1; 142 memcpy(&info->loadparm, &sccb->loadparm, LOADPARM_LEN); 143 } 144 145 static void sclp_sync_callback(struct sclp_req *req, void *data) 146 { 147 struct completion *completion = data; 148 149 complete(completion); 150 } 151 152 static int do_sync_request(sclp_cmdw_t cmd, void *sccb) 153 { 154 struct completion completion; 155 struct sclp_req *request; 156 int rc; 157 158 request = kzalloc(sizeof(*request), GFP_KERNEL); 159 if (!request) 160 return -ENOMEM; 161 request->command = cmd; 162 request->sccb = sccb; 163 request->status = SCLP_REQ_FILLED; 164 request->callback = sclp_sync_callback; 165 request->callback_data = &completion; 166 init_completion(&completion); 167 168 /* Perform sclp request. */ 169 rc = sclp_add_request(request); 170 if (rc) 171 goto out; 172 wait_for_completion(&completion); 173 174 /* Check response. */ 175 if (request->status != SCLP_REQ_DONE) { 176 pr_warning("sync request failed (cmd=0x%08x, " 177 "status=0x%02x)\n", cmd, request->status); 178 rc = -EIO; 179 } 180 out: 181 kfree(request); 182 return rc; 183 } 184 185 /* 186 * CPU configuration related functions. 187 */ 188 189 #define SCLP_CMDW_READ_CPU_INFO 0x00010001 190 #define SCLP_CMDW_CONFIGURE_CPU 0x00110001 191 #define SCLP_CMDW_DECONFIGURE_CPU 0x00100001 192 193 struct read_cpu_info_sccb { 194 struct sccb_header header; 195 u16 nr_configured; 196 u16 offset_configured; 197 u16 nr_standby; 198 u16 offset_standby; 199 u8 reserved[4096 - 16]; 200 } __attribute__((packed, aligned(PAGE_SIZE))); 201 202 static void sclp_fill_cpu_info(struct sclp_cpu_info *info, 203 struct read_cpu_info_sccb *sccb) 204 { 205 char *page = (char *) sccb; 206 207 memset(info, 0, sizeof(*info)); 208 info->configured = sccb->nr_configured; 209 info->standby = sccb->nr_standby; 210 info->combined = sccb->nr_configured + sccb->nr_standby; 211 info->has_cpu_type = sclp_fac84 & 0x1; 212 memcpy(&info->cpu, page + sccb->offset_configured, 213 info->combined * sizeof(struct sclp_cpu_entry)); 214 } 215 216 int sclp_get_cpu_info(struct sclp_cpu_info *info) 217 { 218 int rc; 219 struct read_cpu_info_sccb *sccb; 220 221 if (!SCLP_HAS_CPU_INFO) 222 return -EOPNOTSUPP; 223 sccb = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA); 224 if (!sccb) 225 return -ENOMEM; 226 sccb->header.length = sizeof(*sccb); 227 rc = do_sync_request(SCLP_CMDW_READ_CPU_INFO, sccb); 228 if (rc) 229 goto out; 230 if (sccb->header.response_code != 0x0010) { 231 pr_warning("readcpuinfo failed (response=0x%04x)\n", 232 sccb->header.response_code); 233 rc = -EIO; 234 goto out; 235 } 236 sclp_fill_cpu_info(info, sccb); 237 out: 238 free_page((unsigned long) sccb); 239 return rc; 240 } 241 242 struct cpu_configure_sccb { 243 struct sccb_header header; 244 } __attribute__((packed, aligned(8))); 245 246 static int do_cpu_configure(sclp_cmdw_t cmd) 247 { 248 struct cpu_configure_sccb *sccb; 249 int rc; 250 251 if (!SCLP_HAS_CPU_RECONFIG) 252 return -EOPNOTSUPP; 253 /* 254 * This is not going to cross a page boundary since we force 255 * kmalloc to have a minimum alignment of 8 bytes on s390. 256 */ 257 sccb = kzalloc(sizeof(*sccb), GFP_KERNEL | GFP_DMA); 258 if (!sccb) 259 return -ENOMEM; 260 sccb->header.length = sizeof(*sccb); 261 rc = do_sync_request(cmd, sccb); 262 if (rc) 263 goto out; 264 switch (sccb->header.response_code) { 265 case 0x0020: 266 case 0x0120: 267 break; 268 default: 269 pr_warning("configure cpu failed (cmd=0x%08x, " 270 "response=0x%04x)\n", cmd, 271 sccb->header.response_code); 272 rc = -EIO; 273 break; 274 } 275 out: 276 kfree(sccb); 277 return rc; 278 } 279 280 int sclp_cpu_configure(u8 cpu) 281 { 282 return do_cpu_configure(SCLP_CMDW_CONFIGURE_CPU | cpu << 8); 283 } 284 285 int sclp_cpu_deconfigure(u8 cpu) 286 { 287 return do_cpu_configure(SCLP_CMDW_DECONFIGURE_CPU | cpu << 8); 288 } 289 290 #ifdef CONFIG_MEMORY_HOTPLUG 291 292 static DEFINE_MUTEX(sclp_mem_mutex); 293 static LIST_HEAD(sclp_mem_list); 294 static u8 sclp_max_storage_id; 295 static unsigned long sclp_storage_ids[256 / BITS_PER_LONG]; 296 static int sclp_mem_state_changed; 297 298 struct memory_increment { 299 struct list_head list; 300 u16 rn; 301 int standby; 302 int usecount; 303 }; 304 305 struct assign_storage_sccb { 306 struct sccb_header header; 307 u16 rn; 308 } __packed; 309 310 static unsigned long long rn2addr(u16 rn) 311 { 312 return (unsigned long long) (rn - 1) * rzm; 313 } 314 315 static int do_assign_storage(sclp_cmdw_t cmd, u16 rn) 316 { 317 struct assign_storage_sccb *sccb; 318 int rc; 319 320 sccb = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA); 321 if (!sccb) 322 return -ENOMEM; 323 sccb->header.length = PAGE_SIZE; 324 sccb->rn = rn; 325 rc = do_sync_request(cmd, sccb); 326 if (rc) 327 goto out; 328 switch (sccb->header.response_code) { 329 case 0x0020: 330 case 0x0120: 331 break; 332 default: 333 pr_warning("assign storage failed (cmd=0x%08x, " 334 "response=0x%04x, rn=0x%04x)\n", cmd, 335 sccb->header.response_code, rn); 336 rc = -EIO; 337 break; 338 } 339 out: 340 free_page((unsigned long) sccb); 341 return rc; 342 } 343 344 static int sclp_assign_storage(u16 rn) 345 { 346 return do_assign_storage(0x000d0001, rn); 347 } 348 349 static int sclp_unassign_storage(u16 rn) 350 { 351 return do_assign_storage(0x000c0001, rn); 352 } 353 354 struct attach_storage_sccb { 355 struct sccb_header header; 356 u16 :16; 357 u16 assigned; 358 u32 :32; 359 u32 entries[0]; 360 } __packed; 361 362 static int sclp_attach_storage(u8 id) 363 { 364 struct attach_storage_sccb *sccb; 365 int rc; 366 int i; 367 368 sccb = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA); 369 if (!sccb) 370 return -ENOMEM; 371 sccb->header.length = PAGE_SIZE; 372 rc = do_sync_request(0x00080001 | id << 8, sccb); 373 if (rc) 374 goto out; 375 switch (sccb->header.response_code) { 376 case 0x0020: 377 set_bit(id, sclp_storage_ids); 378 for (i = 0; i < sccb->assigned; i++) 379 sclp_unassign_storage(sccb->entries[i] >> 16); 380 break; 381 default: 382 rc = -EIO; 383 break; 384 } 385 out: 386 free_page((unsigned long) sccb); 387 return rc; 388 } 389 390 static int sclp_mem_change_state(unsigned long start, unsigned long size, 391 int online) 392 { 393 struct memory_increment *incr; 394 unsigned long long istart; 395 int rc = 0; 396 397 list_for_each_entry(incr, &sclp_mem_list, list) { 398 istart = rn2addr(incr->rn); 399 if (start + size - 1 < istart) 400 break; 401 if (start > istart + rzm - 1) 402 continue; 403 if (online) { 404 if (incr->usecount++) 405 continue; 406 /* 407 * Don't break the loop if one assign fails. Loop may 408 * be walked again on CANCEL and we can't save 409 * information if state changed before or not. 410 * So continue and increase usecount for all increments. 411 */ 412 rc |= sclp_assign_storage(incr->rn); 413 } else { 414 if (--incr->usecount) 415 continue; 416 sclp_unassign_storage(incr->rn); 417 } 418 } 419 return rc ? -EIO : 0; 420 } 421 422 static int sclp_mem_notifier(struct notifier_block *nb, 423 unsigned long action, void *data) 424 { 425 unsigned long start, size; 426 struct memory_notify *arg; 427 unsigned char id; 428 int rc = 0; 429 430 arg = data; 431 start = arg->start_pfn << PAGE_SHIFT; 432 size = arg->nr_pages << PAGE_SHIFT; 433 mutex_lock(&sclp_mem_mutex); 434 for (id = 0; id <= sclp_max_storage_id; id++) 435 if (!test_bit(id, sclp_storage_ids)) 436 sclp_attach_storage(id); 437 switch (action) { 438 case MEM_ONLINE: 439 case MEM_GOING_OFFLINE: 440 case MEM_CANCEL_OFFLINE: 441 break; 442 case MEM_GOING_ONLINE: 443 rc = sclp_mem_change_state(start, size, 1); 444 break; 445 case MEM_CANCEL_ONLINE: 446 sclp_mem_change_state(start, size, 0); 447 break; 448 case MEM_OFFLINE: 449 sclp_mem_change_state(start, size, 0); 450 break; 451 default: 452 rc = -EINVAL; 453 break; 454 } 455 if (!rc) 456 sclp_mem_state_changed = 1; 457 mutex_unlock(&sclp_mem_mutex); 458 return rc ? NOTIFY_BAD : NOTIFY_OK; 459 } 460 461 static struct notifier_block sclp_mem_nb = { 462 .notifier_call = sclp_mem_notifier, 463 }; 464 465 static void __init add_memory_merged(u16 rn) 466 { 467 static u16 first_rn, num; 468 unsigned long long start, size; 469 470 if (rn && first_rn && (first_rn + num == rn)) { 471 num++; 472 return; 473 } 474 if (!first_rn) 475 goto skip_add; 476 start = rn2addr(first_rn); 477 size = (unsigned long long ) num * rzm; 478 if (start >= VMEM_MAX_PHYS) 479 goto skip_add; 480 if (start + size > VMEM_MAX_PHYS) 481 size = VMEM_MAX_PHYS - start; 482 if (memory_end_set && (start >= memory_end)) 483 goto skip_add; 484 if (memory_end_set && (start + size > memory_end)) 485 size = memory_end - start; 486 add_memory(0, start, size); 487 skip_add: 488 first_rn = rn; 489 num = 1; 490 } 491 492 static void __init sclp_add_standby_memory(void) 493 { 494 struct memory_increment *incr; 495 496 list_for_each_entry(incr, &sclp_mem_list, list) 497 if (incr->standby) 498 add_memory_merged(incr->rn); 499 add_memory_merged(0); 500 } 501 502 static void __init insert_increment(u16 rn, int standby, int assigned) 503 { 504 struct memory_increment *incr, *new_incr; 505 struct list_head *prev; 506 u16 last_rn; 507 508 new_incr = kzalloc(sizeof(*new_incr), GFP_KERNEL); 509 if (!new_incr) 510 return; 511 new_incr->rn = rn; 512 new_incr->standby = standby; 513 last_rn = 0; 514 prev = &sclp_mem_list; 515 list_for_each_entry(incr, &sclp_mem_list, list) { 516 if (assigned && incr->rn > rn) 517 break; 518 if (!assigned && incr->rn - last_rn > 1) 519 break; 520 last_rn = incr->rn; 521 prev = &incr->list; 522 } 523 if (!assigned) 524 new_incr->rn = last_rn + 1; 525 if (new_incr->rn > rnmax) { 526 kfree(new_incr); 527 return; 528 } 529 list_add(&new_incr->list, prev); 530 } 531 532 static int sclp_mem_freeze(struct device *dev) 533 { 534 if (!sclp_mem_state_changed) 535 return 0; 536 pr_err("Memory hotplug state changed, suspend refused.\n"); 537 return -EPERM; 538 } 539 540 struct read_storage_sccb { 541 struct sccb_header header; 542 u16 max_id; 543 u16 assigned; 544 u16 standby; 545 u16 :16; 546 u32 entries[0]; 547 } __packed; 548 549 static struct dev_pm_ops sclp_mem_pm_ops = { 550 .freeze = sclp_mem_freeze, 551 }; 552 553 static struct platform_driver sclp_mem_pdrv = { 554 .driver = { 555 .name = "sclp_mem", 556 .pm = &sclp_mem_pm_ops, 557 }, 558 }; 559 560 static int __init sclp_detect_standby_memory(void) 561 { 562 struct platform_device *sclp_pdev; 563 struct read_storage_sccb *sccb; 564 int i, id, assigned, rc; 565 566 if (!early_read_info_sccb_valid) 567 return 0; 568 if ((sclp_facilities & 0xe00000000000ULL) != 0xe00000000000ULL) 569 return 0; 570 rc = -ENOMEM; 571 sccb = (void *) __get_free_page(GFP_KERNEL | GFP_DMA); 572 if (!sccb) 573 goto out; 574 assigned = 0; 575 for (id = 0; id <= sclp_max_storage_id; id++) { 576 memset(sccb, 0, PAGE_SIZE); 577 sccb->header.length = PAGE_SIZE; 578 rc = do_sync_request(0x00040001 | id << 8, sccb); 579 if (rc) 580 goto out; 581 switch (sccb->header.response_code) { 582 case 0x0010: 583 set_bit(id, sclp_storage_ids); 584 for (i = 0; i < sccb->assigned; i++) { 585 if (!sccb->entries[i]) 586 continue; 587 assigned++; 588 insert_increment(sccb->entries[i] >> 16, 0, 1); 589 } 590 break; 591 case 0x0310: 592 break; 593 case 0x0410: 594 for (i = 0; i < sccb->assigned; i++) { 595 if (!sccb->entries[i]) 596 continue; 597 assigned++; 598 insert_increment(sccb->entries[i] >> 16, 1, 1); 599 } 600 break; 601 default: 602 rc = -EIO; 603 break; 604 } 605 if (!rc) 606 sclp_max_storage_id = sccb->max_id; 607 } 608 if (rc || list_empty(&sclp_mem_list)) 609 goto out; 610 for (i = 1; i <= rnmax - assigned; i++) 611 insert_increment(0, 1, 0); 612 rc = register_memory_notifier(&sclp_mem_nb); 613 if (rc) 614 goto out; 615 rc = platform_driver_register(&sclp_mem_pdrv); 616 if (rc) 617 goto out; 618 sclp_pdev = platform_device_register_simple("sclp_mem", -1, NULL, 0); 619 rc = IS_ERR(sclp_pdev) ? PTR_ERR(sclp_pdev) : 0; 620 if (rc) 621 goto out_driver; 622 sclp_add_standby_memory(); 623 goto out; 624 out_driver: 625 platform_driver_unregister(&sclp_mem_pdrv); 626 out: 627 free_page((unsigned long) sccb); 628 return rc; 629 } 630 __initcall(sclp_detect_standby_memory); 631 632 #endif /* CONFIG_MEMORY_HOTPLUG */ 633 634 /* 635 * Channel path configuration related functions. 636 */ 637 638 #define SCLP_CMDW_CONFIGURE_CHPATH 0x000f0001 639 #define SCLP_CMDW_DECONFIGURE_CHPATH 0x000e0001 640 #define SCLP_CMDW_READ_CHPATH_INFORMATION 0x00030001 641 642 struct chp_cfg_sccb { 643 struct sccb_header header; 644 u8 ccm; 645 u8 reserved[6]; 646 u8 cssid; 647 } __attribute__((packed)); 648 649 static int do_chp_configure(sclp_cmdw_t cmd) 650 { 651 struct chp_cfg_sccb *sccb; 652 int rc; 653 654 if (!SCLP_HAS_CHP_RECONFIG) 655 return -EOPNOTSUPP; 656 /* Prepare sccb. */ 657 sccb = (struct chp_cfg_sccb *) get_zeroed_page(GFP_KERNEL | GFP_DMA); 658 if (!sccb) 659 return -ENOMEM; 660 sccb->header.length = sizeof(*sccb); 661 rc = do_sync_request(cmd, sccb); 662 if (rc) 663 goto out; 664 switch (sccb->header.response_code) { 665 case 0x0020: 666 case 0x0120: 667 case 0x0440: 668 case 0x0450: 669 break; 670 default: 671 pr_warning("configure channel-path failed " 672 "(cmd=0x%08x, response=0x%04x)\n", cmd, 673 sccb->header.response_code); 674 rc = -EIO; 675 break; 676 } 677 out: 678 free_page((unsigned long) sccb); 679 return rc; 680 } 681 682 /** 683 * sclp_chp_configure - perform configure channel-path sclp command 684 * @chpid: channel-path ID 685 * 686 * Perform configure channel-path command sclp command for specified chpid. 687 * Return 0 after command successfully finished, non-zero otherwise. 688 */ 689 int sclp_chp_configure(struct chp_id chpid) 690 { 691 return do_chp_configure(SCLP_CMDW_CONFIGURE_CHPATH | chpid.id << 8); 692 } 693 694 /** 695 * sclp_chp_deconfigure - perform deconfigure channel-path sclp command 696 * @chpid: channel-path ID 697 * 698 * Perform deconfigure channel-path command sclp command for specified chpid 699 * and wait for completion. On success return 0. Return non-zero otherwise. 700 */ 701 int sclp_chp_deconfigure(struct chp_id chpid) 702 { 703 return do_chp_configure(SCLP_CMDW_DECONFIGURE_CHPATH | chpid.id << 8); 704 } 705 706 struct chp_info_sccb { 707 struct sccb_header header; 708 u8 recognized[SCLP_CHP_INFO_MASK_SIZE]; 709 u8 standby[SCLP_CHP_INFO_MASK_SIZE]; 710 u8 configured[SCLP_CHP_INFO_MASK_SIZE]; 711 u8 ccm; 712 u8 reserved[6]; 713 u8 cssid; 714 } __attribute__((packed)); 715 716 /** 717 * sclp_chp_read_info - perform read channel-path information sclp command 718 * @info: resulting channel-path information data 719 * 720 * Perform read channel-path information sclp command and wait for completion. 721 * On success, store channel-path information in @info and return 0. Return 722 * non-zero otherwise. 723 */ 724 int sclp_chp_read_info(struct sclp_chp_info *info) 725 { 726 struct chp_info_sccb *sccb; 727 int rc; 728 729 if (!SCLP_HAS_CHP_INFO) 730 return -EOPNOTSUPP; 731 /* Prepare sccb. */ 732 sccb = (struct chp_info_sccb *) get_zeroed_page(GFP_KERNEL | GFP_DMA); 733 if (!sccb) 734 return -ENOMEM; 735 sccb->header.length = sizeof(*sccb); 736 rc = do_sync_request(SCLP_CMDW_READ_CHPATH_INFORMATION, sccb); 737 if (rc) 738 goto out; 739 if (sccb->header.response_code != 0x0010) { 740 pr_warning("read channel-path info failed " 741 "(response=0x%04x)\n", sccb->header.response_code); 742 rc = -EIO; 743 goto out; 744 } 745 memcpy(info->recognized, sccb->recognized, SCLP_CHP_INFO_MASK_SIZE); 746 memcpy(info->standby, sccb->standby, SCLP_CHP_INFO_MASK_SIZE); 747 memcpy(info->configured, sccb->configured, SCLP_CHP_INFO_MASK_SIZE); 748 out: 749 free_page((unsigned long) sccb); 750 return rc; 751 } 752