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