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