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