1 /* 2 * Copyright IBM Corp. 2007,2012 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/export.h> 16 #include <linux/slab.h> 17 #include <linux/string.h> 18 #include <linux/mm.h> 19 #include <linux/mmzone.h> 20 #include <linux/memory.h> 21 #include <linux/module.h> 22 #include <linux/platform_device.h> 23 #include <asm/ctl_reg.h> 24 #include <asm/chpid.h> 25 #include <asm/setup.h> 26 #include <asm/page.h> 27 #include <asm/sclp.h> 28 #include <asm/numa.h> 29 30 #include "sclp.h" 31 32 static void sclp_sync_callback(struct sclp_req *req, void *data) 33 { 34 struct completion *completion = data; 35 36 complete(completion); 37 } 38 39 int sclp_sync_request(sclp_cmdw_t cmd, void *sccb) 40 { 41 return sclp_sync_request_timeout(cmd, sccb, 0); 42 } 43 44 int sclp_sync_request_timeout(sclp_cmdw_t cmd, void *sccb, int timeout) 45 { 46 struct completion completion; 47 struct sclp_req *request; 48 int rc; 49 50 request = kzalloc(sizeof(*request), GFP_KERNEL); 51 if (!request) 52 return -ENOMEM; 53 if (timeout) 54 request->queue_timeout = timeout; 55 request->command = cmd; 56 request->sccb = sccb; 57 request->status = SCLP_REQ_FILLED; 58 request->callback = sclp_sync_callback; 59 request->callback_data = &completion; 60 init_completion(&completion); 61 62 /* Perform sclp request. */ 63 rc = sclp_add_request(request); 64 if (rc) 65 goto out; 66 wait_for_completion(&completion); 67 68 /* Check response. */ 69 if (request->status != SCLP_REQ_DONE) { 70 pr_warn("sync request failed (cmd=0x%08x, status=0x%02x)\n", 71 cmd, request->status); 72 rc = -EIO; 73 } 74 out: 75 kfree(request); 76 return rc; 77 } 78 79 /* 80 * CPU configuration related functions. 81 */ 82 83 #define SCLP_CMDW_READ_CPU_INFO 0x00010001 84 #define SCLP_CMDW_CONFIGURE_CPU 0x00110001 85 #define SCLP_CMDW_DECONFIGURE_CPU 0x00100001 86 87 struct read_cpu_info_sccb { 88 struct sccb_header header; 89 u16 nr_configured; 90 u16 offset_configured; 91 u16 nr_standby; 92 u16 offset_standby; 93 u8 reserved[4096 - 16]; 94 } __attribute__((packed, aligned(PAGE_SIZE))); 95 96 static void sclp_fill_core_info(struct sclp_core_info *info, 97 struct read_cpu_info_sccb *sccb) 98 { 99 char *page = (char *) sccb; 100 101 memset(info, 0, sizeof(*info)); 102 info->configured = sccb->nr_configured; 103 info->standby = sccb->nr_standby; 104 info->combined = sccb->nr_configured + sccb->nr_standby; 105 memcpy(&info->core, page + sccb->offset_configured, 106 info->combined * sizeof(struct sclp_core_entry)); 107 } 108 109 int sclp_get_core_info(struct sclp_core_info *info) 110 { 111 int rc; 112 struct read_cpu_info_sccb *sccb; 113 114 if (!SCLP_HAS_CPU_INFO) 115 return -EOPNOTSUPP; 116 sccb = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA); 117 if (!sccb) 118 return -ENOMEM; 119 sccb->header.length = sizeof(*sccb); 120 rc = sclp_sync_request_timeout(SCLP_CMDW_READ_CPU_INFO, sccb, 121 SCLP_QUEUE_INTERVAL); 122 if (rc) 123 goto out; 124 if (sccb->header.response_code != 0x0010) { 125 pr_warn("readcpuinfo failed (response=0x%04x)\n", 126 sccb->header.response_code); 127 rc = -EIO; 128 goto out; 129 } 130 sclp_fill_core_info(info, sccb); 131 out: 132 free_page((unsigned long) sccb); 133 return rc; 134 } 135 136 struct cpu_configure_sccb { 137 struct sccb_header header; 138 } __attribute__((packed, aligned(8))); 139 140 static int do_core_configure(sclp_cmdw_t cmd) 141 { 142 struct cpu_configure_sccb *sccb; 143 int rc; 144 145 if (!SCLP_HAS_CPU_RECONFIG) 146 return -EOPNOTSUPP; 147 /* 148 * This is not going to cross a page boundary since we force 149 * kmalloc to have a minimum alignment of 8 bytes on s390. 150 */ 151 sccb = kzalloc(sizeof(*sccb), GFP_KERNEL | GFP_DMA); 152 if (!sccb) 153 return -ENOMEM; 154 sccb->header.length = sizeof(*sccb); 155 rc = sclp_sync_request_timeout(cmd, sccb, SCLP_QUEUE_INTERVAL); 156 if (rc) 157 goto out; 158 switch (sccb->header.response_code) { 159 case 0x0020: 160 case 0x0120: 161 break; 162 default: 163 pr_warn("configure cpu failed (cmd=0x%08x, response=0x%04x)\n", 164 cmd, sccb->header.response_code); 165 rc = -EIO; 166 break; 167 } 168 out: 169 kfree(sccb); 170 return rc; 171 } 172 173 int sclp_core_configure(u8 core) 174 { 175 return do_core_configure(SCLP_CMDW_CONFIGURE_CPU | core << 8); 176 } 177 178 int sclp_core_deconfigure(u8 core) 179 { 180 return do_core_configure(SCLP_CMDW_DECONFIGURE_CPU | core << 8); 181 } 182 183 #ifdef CONFIG_MEMORY_HOTPLUG 184 185 static DEFINE_MUTEX(sclp_mem_mutex); 186 static LIST_HEAD(sclp_mem_list); 187 static u8 sclp_max_storage_id; 188 static DECLARE_BITMAP(sclp_storage_ids, 256); 189 static int sclp_mem_state_changed; 190 191 struct memory_increment { 192 struct list_head list; 193 u16 rn; 194 int standby; 195 }; 196 197 struct assign_storage_sccb { 198 struct sccb_header header; 199 u16 rn; 200 } __packed; 201 202 int arch_get_memory_phys_device(unsigned long start_pfn) 203 { 204 if (!sclp.rzm) 205 return 0; 206 return PFN_PHYS(start_pfn) >> ilog2(sclp.rzm); 207 } 208 209 static unsigned long long rn2addr(u16 rn) 210 { 211 return (unsigned long long) (rn - 1) * sclp.rzm; 212 } 213 214 static int do_assign_storage(sclp_cmdw_t cmd, u16 rn) 215 { 216 struct assign_storage_sccb *sccb; 217 int rc; 218 219 sccb = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA); 220 if (!sccb) 221 return -ENOMEM; 222 sccb->header.length = PAGE_SIZE; 223 sccb->rn = rn; 224 rc = sclp_sync_request_timeout(cmd, sccb, SCLP_QUEUE_INTERVAL); 225 if (rc) 226 goto out; 227 switch (sccb->header.response_code) { 228 case 0x0020: 229 case 0x0120: 230 break; 231 default: 232 pr_warn("assign storage failed (cmd=0x%08x, response=0x%04x, rn=0x%04x)\n", 233 cmd, sccb->header.response_code, rn); 234 rc = -EIO; 235 break; 236 } 237 out: 238 free_page((unsigned long) sccb); 239 return rc; 240 } 241 242 static int sclp_assign_storage(u16 rn) 243 { 244 unsigned long long start; 245 int rc; 246 247 rc = do_assign_storage(0x000d0001, rn); 248 if (rc) 249 return rc; 250 start = rn2addr(rn); 251 storage_key_init_range(start, start + sclp.rzm); 252 return 0; 253 } 254 255 static int sclp_unassign_storage(u16 rn) 256 { 257 return do_assign_storage(0x000c0001, rn); 258 } 259 260 struct attach_storage_sccb { 261 struct sccb_header header; 262 u16 :16; 263 u16 assigned; 264 u32 :32; 265 u32 entries[0]; 266 } __packed; 267 268 static int sclp_attach_storage(u8 id) 269 { 270 struct attach_storage_sccb *sccb; 271 int rc; 272 int i; 273 274 sccb = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA); 275 if (!sccb) 276 return -ENOMEM; 277 sccb->header.length = PAGE_SIZE; 278 rc = sclp_sync_request_timeout(0x00080001 | id << 8, sccb, 279 SCLP_QUEUE_INTERVAL); 280 if (rc) 281 goto out; 282 switch (sccb->header.response_code) { 283 case 0x0020: 284 set_bit(id, sclp_storage_ids); 285 for (i = 0; i < sccb->assigned; i++) { 286 if (sccb->entries[i]) 287 sclp_unassign_storage(sccb->entries[i] >> 16); 288 } 289 break; 290 default: 291 rc = -EIO; 292 break; 293 } 294 out: 295 free_page((unsigned long) sccb); 296 return rc; 297 } 298 299 static int sclp_mem_change_state(unsigned long start, unsigned long size, 300 int online) 301 { 302 struct memory_increment *incr; 303 unsigned long long istart; 304 int rc = 0; 305 306 list_for_each_entry(incr, &sclp_mem_list, list) { 307 istart = rn2addr(incr->rn); 308 if (start + size - 1 < istart) 309 break; 310 if (start > istart + sclp.rzm - 1) 311 continue; 312 if (online) 313 rc |= sclp_assign_storage(incr->rn); 314 else 315 sclp_unassign_storage(incr->rn); 316 if (rc == 0) 317 incr->standby = online ? 0 : 1; 318 } 319 return rc ? -EIO : 0; 320 } 321 322 static bool contains_standby_increment(unsigned long start, unsigned long end) 323 { 324 struct memory_increment *incr; 325 unsigned long istart; 326 327 list_for_each_entry(incr, &sclp_mem_list, list) { 328 istart = rn2addr(incr->rn); 329 if (end - 1 < istart) 330 continue; 331 if (start > istart + sclp.rzm - 1) 332 continue; 333 if (incr->standby) 334 return true; 335 } 336 return false; 337 } 338 339 static int sclp_mem_notifier(struct notifier_block *nb, 340 unsigned long action, void *data) 341 { 342 unsigned long start, size; 343 struct memory_notify *arg; 344 unsigned char id; 345 int rc = 0; 346 347 arg = data; 348 start = arg->start_pfn << PAGE_SHIFT; 349 size = arg->nr_pages << PAGE_SHIFT; 350 mutex_lock(&sclp_mem_mutex); 351 for_each_clear_bit(id, sclp_storage_ids, sclp_max_storage_id + 1) 352 sclp_attach_storage(id); 353 switch (action) { 354 case MEM_GOING_OFFLINE: 355 /* 356 * We do not allow to set memory blocks offline that contain 357 * standby memory. This is done to simplify the "memory online" 358 * case. 359 */ 360 if (contains_standby_increment(start, start + size)) 361 rc = -EPERM; 362 break; 363 case MEM_ONLINE: 364 case MEM_CANCEL_OFFLINE: 365 break; 366 case MEM_GOING_ONLINE: 367 rc = sclp_mem_change_state(start, size, 1); 368 break; 369 case MEM_CANCEL_ONLINE: 370 sclp_mem_change_state(start, size, 0); 371 break; 372 case MEM_OFFLINE: 373 sclp_mem_change_state(start, size, 0); 374 break; 375 default: 376 rc = -EINVAL; 377 break; 378 } 379 if (!rc) 380 sclp_mem_state_changed = 1; 381 mutex_unlock(&sclp_mem_mutex); 382 return rc ? NOTIFY_BAD : NOTIFY_OK; 383 } 384 385 static struct notifier_block sclp_mem_nb = { 386 .notifier_call = sclp_mem_notifier, 387 }; 388 389 static void __init align_to_block_size(unsigned long long *start, 390 unsigned long long *size, 391 unsigned long long alignment) 392 { 393 unsigned long long start_align, size_align; 394 395 start_align = roundup(*start, alignment); 396 size_align = rounddown(*start + *size, alignment) - start_align; 397 398 pr_info("Standby memory at 0x%llx (%lluM of %lluM usable)\n", 399 *start, size_align >> 20, *size >> 20); 400 *start = start_align; 401 *size = size_align; 402 } 403 404 static void __init add_memory_merged(u16 rn) 405 { 406 unsigned long long start, size, addr, block_size; 407 static u16 first_rn, num; 408 409 if (rn && first_rn && (first_rn + num == rn)) { 410 num++; 411 return; 412 } 413 if (!first_rn) 414 goto skip_add; 415 start = rn2addr(first_rn); 416 size = (unsigned long long) num * sclp.rzm; 417 if (start >= VMEM_MAX_PHYS) 418 goto skip_add; 419 if (start + size > VMEM_MAX_PHYS) 420 size = VMEM_MAX_PHYS - start; 421 if (memory_end_set && (start >= memory_end)) 422 goto skip_add; 423 if (memory_end_set && (start + size > memory_end)) 424 size = memory_end - start; 425 block_size = memory_block_size_bytes(); 426 align_to_block_size(&start, &size, block_size); 427 if (!size) 428 goto skip_add; 429 for (addr = start; addr < start + size; addr += block_size) 430 add_memory(numa_pfn_to_nid(PFN_DOWN(addr)), addr, block_size); 431 skip_add: 432 first_rn = rn; 433 num = 1; 434 } 435 436 static void __init sclp_add_standby_memory(void) 437 { 438 struct memory_increment *incr; 439 440 list_for_each_entry(incr, &sclp_mem_list, list) 441 if (incr->standby) 442 add_memory_merged(incr->rn); 443 add_memory_merged(0); 444 } 445 446 static void __init insert_increment(u16 rn, int standby, int assigned) 447 { 448 struct memory_increment *incr, *new_incr; 449 struct list_head *prev; 450 u16 last_rn; 451 452 new_incr = kzalloc(sizeof(*new_incr), GFP_KERNEL); 453 if (!new_incr) 454 return; 455 new_incr->rn = rn; 456 new_incr->standby = standby; 457 last_rn = 0; 458 prev = &sclp_mem_list; 459 list_for_each_entry(incr, &sclp_mem_list, list) { 460 if (assigned && incr->rn > rn) 461 break; 462 if (!assigned && incr->rn - last_rn > 1) 463 break; 464 last_rn = incr->rn; 465 prev = &incr->list; 466 } 467 if (!assigned) 468 new_incr->rn = last_rn + 1; 469 if (new_incr->rn > sclp.rnmax) { 470 kfree(new_incr); 471 return; 472 } 473 list_add(&new_incr->list, prev); 474 } 475 476 static int sclp_mem_freeze(struct device *dev) 477 { 478 if (!sclp_mem_state_changed) 479 return 0; 480 pr_err("Memory hotplug state changed, suspend refused.\n"); 481 return -EPERM; 482 } 483 484 struct read_storage_sccb { 485 struct sccb_header header; 486 u16 max_id; 487 u16 assigned; 488 u16 standby; 489 u16 :16; 490 u32 entries[0]; 491 } __packed; 492 493 static const struct dev_pm_ops sclp_mem_pm_ops = { 494 .freeze = sclp_mem_freeze, 495 }; 496 497 static struct platform_driver sclp_mem_pdrv = { 498 .driver = { 499 .name = "sclp_mem", 500 .pm = &sclp_mem_pm_ops, 501 }, 502 }; 503 504 static int __init sclp_detect_standby_memory(void) 505 { 506 struct platform_device *sclp_pdev; 507 struct read_storage_sccb *sccb; 508 int i, id, assigned, rc; 509 510 if (OLDMEM_BASE) /* No standby memory in kdump mode */ 511 return 0; 512 if ((sclp.facilities & 0xe00000000000ULL) != 0xe00000000000ULL) 513 return 0; 514 rc = -ENOMEM; 515 sccb = (void *) __get_free_page(GFP_KERNEL | GFP_DMA); 516 if (!sccb) 517 goto out; 518 assigned = 0; 519 for (id = 0; id <= sclp_max_storage_id; id++) { 520 memset(sccb, 0, PAGE_SIZE); 521 sccb->header.length = PAGE_SIZE; 522 rc = sclp_sync_request(0x00040001 | id << 8, sccb); 523 if (rc) 524 goto out; 525 switch (sccb->header.response_code) { 526 case 0x0010: 527 set_bit(id, sclp_storage_ids); 528 for (i = 0; i < sccb->assigned; i++) { 529 if (!sccb->entries[i]) 530 continue; 531 assigned++; 532 insert_increment(sccb->entries[i] >> 16, 0, 1); 533 } 534 break; 535 case 0x0310: 536 break; 537 case 0x0410: 538 for (i = 0; i < sccb->assigned; i++) { 539 if (!sccb->entries[i]) 540 continue; 541 assigned++; 542 insert_increment(sccb->entries[i] >> 16, 1, 1); 543 } 544 break; 545 default: 546 rc = -EIO; 547 break; 548 } 549 if (!rc) 550 sclp_max_storage_id = sccb->max_id; 551 } 552 if (rc || list_empty(&sclp_mem_list)) 553 goto out; 554 for (i = 1; i <= sclp.rnmax - assigned; i++) 555 insert_increment(0, 1, 0); 556 rc = register_memory_notifier(&sclp_mem_nb); 557 if (rc) 558 goto out; 559 rc = platform_driver_register(&sclp_mem_pdrv); 560 if (rc) 561 goto out; 562 sclp_pdev = platform_device_register_simple("sclp_mem", -1, NULL, 0); 563 rc = PTR_ERR_OR_ZERO(sclp_pdev); 564 if (rc) 565 goto out_driver; 566 sclp_add_standby_memory(); 567 goto out; 568 out_driver: 569 platform_driver_unregister(&sclp_mem_pdrv); 570 out: 571 free_page((unsigned long) sccb); 572 return rc; 573 } 574 __initcall(sclp_detect_standby_memory); 575 576 #endif /* CONFIG_MEMORY_HOTPLUG */ 577 578 /* 579 * PCI I/O adapter configuration related functions. 580 */ 581 #define SCLP_CMDW_CONFIGURE_PCI 0x001a0001 582 #define SCLP_CMDW_DECONFIGURE_PCI 0x001b0001 583 584 #define SCLP_RECONFIG_PCI_ATPYE 2 585 586 struct pci_cfg_sccb { 587 struct sccb_header header; 588 u8 atype; /* adapter type */ 589 u8 reserved1; 590 u16 reserved2; 591 u32 aid; /* adapter identifier */ 592 } __packed; 593 594 static int do_pci_configure(sclp_cmdw_t cmd, u32 fid) 595 { 596 struct pci_cfg_sccb *sccb; 597 int rc; 598 599 if (!SCLP_HAS_PCI_RECONFIG) 600 return -EOPNOTSUPP; 601 602 sccb = (struct pci_cfg_sccb *) get_zeroed_page(GFP_KERNEL | GFP_DMA); 603 if (!sccb) 604 return -ENOMEM; 605 606 sccb->header.length = PAGE_SIZE; 607 sccb->atype = SCLP_RECONFIG_PCI_ATPYE; 608 sccb->aid = fid; 609 rc = sclp_sync_request(cmd, sccb); 610 if (rc) 611 goto out; 612 switch (sccb->header.response_code) { 613 case 0x0020: 614 case 0x0120: 615 break; 616 default: 617 pr_warn("configure PCI I/O adapter failed: cmd=0x%08x response=0x%04x\n", 618 cmd, sccb->header.response_code); 619 rc = -EIO; 620 break; 621 } 622 out: 623 free_page((unsigned long) sccb); 624 return rc; 625 } 626 627 int sclp_pci_configure(u32 fid) 628 { 629 return do_pci_configure(SCLP_CMDW_CONFIGURE_PCI, fid); 630 } 631 EXPORT_SYMBOL(sclp_pci_configure); 632 633 int sclp_pci_deconfigure(u32 fid) 634 { 635 return do_pci_configure(SCLP_CMDW_DECONFIGURE_PCI, fid); 636 } 637 EXPORT_SYMBOL(sclp_pci_deconfigure); 638 639 /* 640 * Channel path configuration related functions. 641 */ 642 643 #define SCLP_CMDW_CONFIGURE_CHPATH 0x000f0001 644 #define SCLP_CMDW_DECONFIGURE_CHPATH 0x000e0001 645 #define SCLP_CMDW_READ_CHPATH_INFORMATION 0x00030001 646 647 struct chp_cfg_sccb { 648 struct sccb_header header; 649 u8 ccm; 650 u8 reserved[6]; 651 u8 cssid; 652 } __attribute__((packed)); 653 654 static int do_chp_configure(sclp_cmdw_t cmd) 655 { 656 struct chp_cfg_sccb *sccb; 657 int rc; 658 659 if (!SCLP_HAS_CHP_RECONFIG) 660 return -EOPNOTSUPP; 661 /* Prepare sccb. */ 662 sccb = (struct chp_cfg_sccb *) get_zeroed_page(GFP_KERNEL | GFP_DMA); 663 if (!sccb) 664 return -ENOMEM; 665 sccb->header.length = sizeof(*sccb); 666 rc = sclp_sync_request(cmd, sccb); 667 if (rc) 668 goto out; 669 switch (sccb->header.response_code) { 670 case 0x0020: 671 case 0x0120: 672 case 0x0440: 673 case 0x0450: 674 break; 675 default: 676 pr_warn("configure channel-path failed (cmd=0x%08x, response=0x%04x)\n", 677 cmd, sccb->header.response_code); 678 rc = -EIO; 679 break; 680 } 681 out: 682 free_page((unsigned long) sccb); 683 return rc; 684 } 685 686 /** 687 * sclp_chp_configure - perform configure channel-path sclp command 688 * @chpid: channel-path ID 689 * 690 * Perform configure channel-path command sclp command for specified chpid. 691 * Return 0 after command successfully finished, non-zero otherwise. 692 */ 693 int sclp_chp_configure(struct chp_id chpid) 694 { 695 return do_chp_configure(SCLP_CMDW_CONFIGURE_CHPATH | chpid.id << 8); 696 } 697 698 /** 699 * sclp_chp_deconfigure - perform deconfigure channel-path sclp command 700 * @chpid: channel-path ID 701 * 702 * Perform deconfigure channel-path command sclp command for specified chpid 703 * and wait for completion. On success return 0. Return non-zero otherwise. 704 */ 705 int sclp_chp_deconfigure(struct chp_id chpid) 706 { 707 return do_chp_configure(SCLP_CMDW_DECONFIGURE_CHPATH | chpid.id << 8); 708 } 709 710 struct chp_info_sccb { 711 struct sccb_header header; 712 u8 recognized[SCLP_CHP_INFO_MASK_SIZE]; 713 u8 standby[SCLP_CHP_INFO_MASK_SIZE]; 714 u8 configured[SCLP_CHP_INFO_MASK_SIZE]; 715 u8 ccm; 716 u8 reserved[6]; 717 u8 cssid; 718 } __attribute__((packed)); 719 720 /** 721 * sclp_chp_read_info - perform read channel-path information sclp command 722 * @info: resulting channel-path information data 723 * 724 * Perform read channel-path information sclp command and wait for completion. 725 * On success, store channel-path information in @info and return 0. Return 726 * non-zero otherwise. 727 */ 728 int sclp_chp_read_info(struct sclp_chp_info *info) 729 { 730 struct chp_info_sccb *sccb; 731 int rc; 732 733 if (!SCLP_HAS_CHP_INFO) 734 return -EOPNOTSUPP; 735 /* Prepare sccb. */ 736 sccb = (struct chp_info_sccb *) get_zeroed_page(GFP_KERNEL | GFP_DMA); 737 if (!sccb) 738 return -ENOMEM; 739 sccb->header.length = sizeof(*sccb); 740 rc = sclp_sync_request(SCLP_CMDW_READ_CHPATH_INFORMATION, sccb); 741 if (rc) 742 goto out; 743 if (sccb->header.response_code != 0x0010) { 744 pr_warn("read channel-path info failed (response=0x%04x)\n", 745 sccb->header.response_code); 746 rc = -EIO; 747 goto out; 748 } 749 memcpy(info->recognized, sccb->recognized, SCLP_CHP_INFO_MASK_SIZE); 750 memcpy(info->standby, sccb->standby, SCLP_CHP_INFO_MASK_SIZE); 751 memcpy(info->configured, sccb->configured, SCLP_CHP_INFO_MASK_SIZE); 752 out: 753 free_page((unsigned long) sccb); 754 return rc; 755 } 756