1/* 2 * S/390 common I/O routines -- channel subsystem call 3 * 4 * Copyright IBM Corp. 1999,2012 5 * Author(s): Ingo Adlung (adlung@de.ibm.com) 6 * Cornelia Huck (cornelia.huck@de.ibm.com) 7 * Arnd Bergmann (arndb@de.ibm.com) 8 */ 9 10#define KMSG_COMPONENT "cio" 11#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt 12 13#include <linux/module.h> 14#include <linux/slab.h> 15#include <linux/init.h> 16#include <linux/device.h> 17#include <linux/pci.h> 18 19#include <asm/cio.h> 20#include <asm/chpid.h> 21#include <asm/chsc.h> 22#include <asm/crw.h> 23#include <asm/isc.h> 24 25#include "css.h" 26#include "cio.h" 27#include "cio_debug.h" 28#include "ioasm.h" 29#include "chp.h" 30#include "chsc.h" 31 32static void *sei_page; 33static void *chsc_page; 34static DEFINE_SPINLOCK(chsc_page_lock); 35 36/** 37 * chsc_error_from_response() - convert a chsc response to an error 38 * @response: chsc response code 39 * 40 * Returns an appropriate Linux error code for @response. 41 */ 42int chsc_error_from_response(int response) 43{ 44 switch (response) { 45 case 0x0001: 46 return 0; 47 case 0x0002: 48 case 0x0003: 49 case 0x0006: 50 case 0x0007: 51 case 0x0008: 52 case 0x000a: 53 case 0x0104: 54 return -EINVAL; 55 case 0x0004: 56 return -EOPNOTSUPP; 57 case 0x000b: 58 case 0x0107: /* "Channel busy" for the op 0x003d */ 59 return -EBUSY; 60 case 0x0100: 61 case 0x0102: 62 return -ENOMEM; 63 default: 64 return -EIO; 65 } 66} 67EXPORT_SYMBOL_GPL(chsc_error_from_response); 68 69struct chsc_ssd_area { 70 struct chsc_header request; 71 u16 :10; 72 u16 ssid:2; 73 u16 :4; 74 u16 f_sch; /* first subchannel */ 75 u16 :16; 76 u16 l_sch; /* last subchannel */ 77 u32 :32; 78 struct chsc_header response; 79 u32 :32; 80 u8 sch_valid : 1; 81 u8 dev_valid : 1; 82 u8 st : 3; /* subchannel type */ 83 u8 zeroes : 3; 84 u8 unit_addr; /* unit address */ 85 u16 devno; /* device number */ 86 u8 path_mask; 87 u8 fla_valid_mask; 88 u16 sch; /* subchannel */ 89 u8 chpid[8]; /* chpids 0-7 */ 90 u16 fla[8]; /* full link addresses 0-7 */ 91} __attribute__ ((packed)); 92 93int chsc_get_ssd_info(struct subchannel_id schid, struct chsc_ssd_info *ssd) 94{ 95 struct chsc_ssd_area *ssd_area; 96 int ccode; 97 int ret; 98 int i; 99 int mask; 100 101 spin_lock_irq(&chsc_page_lock); 102 memset(chsc_page, 0, PAGE_SIZE); 103 ssd_area = chsc_page; 104 ssd_area->request.length = 0x0010; 105 ssd_area->request.code = 0x0004; 106 ssd_area->ssid = schid.ssid; 107 ssd_area->f_sch = schid.sch_no; 108 ssd_area->l_sch = schid.sch_no; 109 110 ccode = chsc(ssd_area); 111 /* Check response. */ 112 if (ccode > 0) { 113 ret = (ccode == 3) ? -ENODEV : -EBUSY; 114 goto out; 115 } 116 ret = chsc_error_from_response(ssd_area->response.code); 117 if (ret != 0) { 118 CIO_MSG_EVENT(2, "chsc: ssd failed for 0.%x.%04x (rc=%04x)\n", 119 schid.ssid, schid.sch_no, 120 ssd_area->response.code); 121 goto out; 122 } 123 if (!ssd_area->sch_valid) { 124 ret = -ENODEV; 125 goto out; 126 } 127 /* Copy data */ 128 ret = 0; 129 memset(ssd, 0, sizeof(struct chsc_ssd_info)); 130 if ((ssd_area->st != SUBCHANNEL_TYPE_IO) && 131 (ssd_area->st != SUBCHANNEL_TYPE_MSG)) 132 goto out; 133 ssd->path_mask = ssd_area->path_mask; 134 ssd->fla_valid_mask = ssd_area->fla_valid_mask; 135 for (i = 0; i < 8; i++) { 136 mask = 0x80 >> i; 137 if (ssd_area->path_mask & mask) { 138 chp_id_init(&ssd->chpid[i]); 139 ssd->chpid[i].id = ssd_area->chpid[i]; 140 } 141 if (ssd_area->fla_valid_mask & mask) 142 ssd->fla[i] = ssd_area->fla[i]; 143 } 144out: 145 spin_unlock_irq(&chsc_page_lock); 146 return ret; 147} 148 149/** 150 * chsc_ssqd() - store subchannel QDIO data (SSQD) 151 * @schid: id of the subchannel on which SSQD is performed 152 * @ssqd: request and response block for SSQD 153 * 154 * Returns 0 on success. 155 */ 156int chsc_ssqd(struct subchannel_id schid, struct chsc_ssqd_area *ssqd) 157{ 158 memset(ssqd, 0, sizeof(*ssqd)); 159 ssqd->request.length = 0x0010; 160 ssqd->request.code = 0x0024; 161 ssqd->first_sch = schid.sch_no; 162 ssqd->last_sch = schid.sch_no; 163 ssqd->ssid = schid.ssid; 164 165 if (chsc(ssqd)) 166 return -EIO; 167 168 return chsc_error_from_response(ssqd->response.code); 169} 170EXPORT_SYMBOL_GPL(chsc_ssqd); 171 172/** 173 * chsc_sadc() - set adapter device controls (SADC) 174 * @schid: id of the subchannel on which SADC is performed 175 * @scssc: request and response block for SADC 176 * @summary_indicator_addr: summary indicator address 177 * @subchannel_indicator_addr: subchannel indicator address 178 * 179 * Returns 0 on success. 180 */ 181int chsc_sadc(struct subchannel_id schid, struct chsc_scssc_area *scssc, 182 u64 summary_indicator_addr, u64 subchannel_indicator_addr) 183{ 184 memset(scssc, 0, sizeof(*scssc)); 185 scssc->request.length = 0x0fe0; 186 scssc->request.code = 0x0021; 187 scssc->operation_code = 0; 188 189 scssc->summary_indicator_addr = summary_indicator_addr; 190 scssc->subchannel_indicator_addr = subchannel_indicator_addr; 191 192 scssc->ks = PAGE_DEFAULT_KEY >> 4; 193 scssc->kc = PAGE_DEFAULT_KEY >> 4; 194 scssc->isc = QDIO_AIRQ_ISC; 195 scssc->schid = schid; 196 197 /* enable the time delay disablement facility */ 198 if (css_general_characteristics.aif_tdd) 199 scssc->word_with_d_bit = 0x10000000; 200 201 if (chsc(scssc)) 202 return -EIO; 203 204 return chsc_error_from_response(scssc->response.code); 205} 206EXPORT_SYMBOL_GPL(chsc_sadc); 207 208static int s390_subchannel_remove_chpid(struct subchannel *sch, void *data) 209{ 210 spin_lock_irq(sch->lock); 211 if (sch->driver && sch->driver->chp_event) 212 if (sch->driver->chp_event(sch, data, CHP_OFFLINE) != 0) 213 goto out_unreg; 214 spin_unlock_irq(sch->lock); 215 return 0; 216 217out_unreg: 218 sch->lpm = 0; 219 spin_unlock_irq(sch->lock); 220 css_schedule_eval(sch->schid); 221 return 0; 222} 223 224void chsc_chp_offline(struct chp_id chpid) 225{ 226 char dbf_txt[15]; 227 struct chp_link link; 228 229 sprintf(dbf_txt, "chpr%x.%02x", chpid.cssid, chpid.id); 230 CIO_TRACE_EVENT(2, dbf_txt); 231 232 if (chp_get_status(chpid) <= 0) 233 return; 234 memset(&link, 0, sizeof(struct chp_link)); 235 link.chpid = chpid; 236 /* Wait until previous actions have settled. */ 237 css_wait_for_slow_path(); 238 for_each_subchannel_staged(s390_subchannel_remove_chpid, NULL, &link); 239} 240 241static int __s390_process_res_acc(struct subchannel *sch, void *data) 242{ 243 spin_lock_irq(sch->lock); 244 if (sch->driver && sch->driver->chp_event) 245 sch->driver->chp_event(sch, data, CHP_ONLINE); 246 spin_unlock_irq(sch->lock); 247 248 return 0; 249} 250 251static void s390_process_res_acc(struct chp_link *link) 252{ 253 char dbf_txt[15]; 254 255 sprintf(dbf_txt, "accpr%x.%02x", link->chpid.cssid, 256 link->chpid.id); 257 CIO_TRACE_EVENT( 2, dbf_txt); 258 if (link->fla != 0) { 259 sprintf(dbf_txt, "fla%x", link->fla); 260 CIO_TRACE_EVENT( 2, dbf_txt); 261 } 262 /* Wait until previous actions have settled. */ 263 css_wait_for_slow_path(); 264 /* 265 * I/O resources may have become accessible. 266 * Scan through all subchannels that may be concerned and 267 * do a validation on those. 268 * The more information we have (info), the less scanning 269 * will we have to do. 270 */ 271 for_each_subchannel_staged(__s390_process_res_acc, NULL, link); 272 css_schedule_reprobe(); 273} 274 275static int 276__get_chpid_from_lir(void *data) 277{ 278 struct lir { 279 u8 iq; 280 u8 ic; 281 u16 sci; 282 /* incident-node descriptor */ 283 u32 indesc[28]; 284 /* attached-node descriptor */ 285 u32 andesc[28]; 286 /* incident-specific information */ 287 u32 isinfo[28]; 288 } __attribute__ ((packed)) *lir; 289 290 lir = data; 291 if (!(lir->iq&0x80)) 292 /* NULL link incident record */ 293 return -EINVAL; 294 if (!(lir->indesc[0]&0xc0000000)) 295 /* node descriptor not valid */ 296 return -EINVAL; 297 if (!(lir->indesc[0]&0x10000000)) 298 /* don't handle device-type nodes - FIXME */ 299 return -EINVAL; 300 /* Byte 3 contains the chpid. Could also be CTCA, but we don't care */ 301 302 return (u16) (lir->indesc[0]&0x000000ff); 303} 304 305struct chsc_sei_nt0_area { 306 u8 flags; 307 u8 vf; /* validity flags */ 308 u8 rs; /* reporting source */ 309 u8 cc; /* content code */ 310 u16 fla; /* full link address */ 311 u16 rsid; /* reporting source id */ 312 u32 reserved1; 313 u32 reserved2; 314 /* ccdf has to be big enough for a link-incident record */ 315 u8 ccdf[PAGE_SIZE - 24 - 16]; /* content-code dependent field */ 316} __packed; 317 318struct chsc_sei_nt2_area { 319 u8 flags; /* p and v bit */ 320 u8 reserved1; 321 u8 reserved2; 322 u8 cc; /* content code */ 323 u32 reserved3[13]; 324 u8 ccdf[PAGE_SIZE - 24 - 56]; /* content-code dependent field */ 325} __packed; 326 327#define CHSC_SEI_NT0 (1ULL << 63) 328#define CHSC_SEI_NT2 (1ULL << 61) 329 330struct chsc_sei { 331 struct chsc_header request; 332 u32 reserved1; 333 u64 ntsm; /* notification type mask */ 334 struct chsc_header response; 335 u32 :24; 336 u8 nt; 337 union { 338 struct chsc_sei_nt0_area nt0_area; 339 struct chsc_sei_nt2_area nt2_area; 340 u8 nt_area[PAGE_SIZE - 24]; 341 } u; 342} __packed; 343 344static void chsc_process_sei_link_incident(struct chsc_sei_nt0_area *sei_area) 345{ 346 struct chp_id chpid; 347 int id; 348 349 CIO_CRW_EVENT(4, "chsc: link incident (rs=%02x, rs_id=%04x)\n", 350 sei_area->rs, sei_area->rsid); 351 if (sei_area->rs != 4) 352 return; 353 id = __get_chpid_from_lir(sei_area->ccdf); 354 if (id < 0) 355 CIO_CRW_EVENT(4, "chsc: link incident - invalid LIR\n"); 356 else { 357 chp_id_init(&chpid); 358 chpid.id = id; 359 chsc_chp_offline(chpid); 360 } 361} 362 363static void chsc_process_sei_res_acc(struct chsc_sei_nt0_area *sei_area) 364{ 365 struct chp_link link; 366 struct chp_id chpid; 367 int status; 368 369 CIO_CRW_EVENT(4, "chsc: resource accessibility event (rs=%02x, " 370 "rs_id=%04x)\n", sei_area->rs, sei_area->rsid); 371 if (sei_area->rs != 4) 372 return; 373 chp_id_init(&chpid); 374 chpid.id = sei_area->rsid; 375 /* allocate a new channel path structure, if needed */ 376 status = chp_get_status(chpid); 377 if (status < 0) 378 chp_new(chpid); 379 else if (!status) 380 return; 381 memset(&link, 0, sizeof(struct chp_link)); 382 link.chpid = chpid; 383 if ((sei_area->vf & 0xc0) != 0) { 384 link.fla = sei_area->fla; 385 if ((sei_area->vf & 0xc0) == 0xc0) 386 /* full link address */ 387 link.fla_mask = 0xffff; 388 else 389 /* link address */ 390 link.fla_mask = 0xff00; 391 } 392 s390_process_res_acc(&link); 393} 394 395static void chsc_process_sei_chp_avail(struct chsc_sei_nt0_area *sei_area) 396{ 397 struct channel_path *chp; 398 struct chp_id chpid; 399 u8 *data; 400 int num; 401 402 CIO_CRW_EVENT(4, "chsc: channel path availability information\n"); 403 if (sei_area->rs != 0) 404 return; 405 data = sei_area->ccdf; 406 chp_id_init(&chpid); 407 for (num = 0; num <= __MAX_CHPID; num++) { 408 if (!chp_test_bit(data, num)) 409 continue; 410 chpid.id = num; 411 412 CIO_CRW_EVENT(4, "Update information for channel path " 413 "%x.%02x\n", chpid.cssid, chpid.id); 414 chp = chpid_to_chp(chpid); 415 if (!chp) { 416 chp_new(chpid); 417 continue; 418 } 419 mutex_lock(&chp->lock); 420 chp_update_desc(chp); 421 mutex_unlock(&chp->lock); 422 } 423} 424 425struct chp_config_data { 426 u8 map[32]; 427 u8 op; 428 u8 pc; 429}; 430 431static void chsc_process_sei_chp_config(struct chsc_sei_nt0_area *sei_area) 432{ 433 struct chp_config_data *data; 434 struct chp_id chpid; 435 int num; 436 char *events[3] = {"configure", "deconfigure", "cancel deconfigure"}; 437 438 CIO_CRW_EVENT(4, "chsc: channel-path-configuration notification\n"); 439 if (sei_area->rs != 0) 440 return; 441 data = (struct chp_config_data *) &(sei_area->ccdf); 442 chp_id_init(&chpid); 443 for (num = 0; num <= __MAX_CHPID; num++) { 444 if (!chp_test_bit(data->map, num)) 445 continue; 446 chpid.id = num; 447 pr_notice("Processing %s for channel path %x.%02x\n", 448 events[data->op], chpid.cssid, chpid.id); 449 switch (data->op) { 450 case 0: 451 chp_cfg_schedule(chpid, 1); 452 break; 453 case 1: 454 chp_cfg_schedule(chpid, 0); 455 break; 456 case 2: 457 chp_cfg_cancel_deconfigure(chpid); 458 break; 459 } 460 } 461} 462 463static void chsc_process_sei_scm_change(struct chsc_sei_nt0_area *sei_area) 464{ 465 int ret; 466 467 CIO_CRW_EVENT(4, "chsc: scm change notification\n"); 468 if (sei_area->rs != 7) 469 return; 470 471 ret = scm_update_information(); 472 if (ret) 473 CIO_CRW_EVENT(0, "chsc: updating change notification" 474 " failed (rc=%d).\n", ret); 475} 476 477static void chsc_process_sei_scm_avail(struct chsc_sei_nt0_area *sei_area) 478{ 479 int ret; 480 481 CIO_CRW_EVENT(4, "chsc: scm available information\n"); 482 if (sei_area->rs != 7) 483 return; 484 485 ret = scm_process_availability_information(); 486 if (ret) 487 CIO_CRW_EVENT(0, "chsc: process availability information" 488 " failed (rc=%d).\n", ret); 489} 490 491static void chsc_process_sei_nt2(struct chsc_sei_nt2_area *sei_area) 492{ 493 switch (sei_area->cc) { 494 case 1: 495 zpci_event_error(sei_area->ccdf); 496 break; 497 case 2: 498 zpci_event_availability(sei_area->ccdf); 499 break; 500 default: 501 CIO_CRW_EVENT(2, "chsc: sei nt2 unhandled cc=%d\n", 502 sei_area->cc); 503 break; 504 } 505} 506 507static void chsc_process_sei_nt0(struct chsc_sei_nt0_area *sei_area) 508{ 509 /* which kind of information was stored? */ 510 switch (sei_area->cc) { 511 case 1: /* link incident*/ 512 chsc_process_sei_link_incident(sei_area); 513 break; 514 case 2: /* i/o resource accessibility */ 515 chsc_process_sei_res_acc(sei_area); 516 break; 517 case 7: /* channel-path-availability information */ 518 chsc_process_sei_chp_avail(sei_area); 519 break; 520 case 8: /* channel-path-configuration notification */ 521 chsc_process_sei_chp_config(sei_area); 522 break; 523 case 12: /* scm change notification */ 524 chsc_process_sei_scm_change(sei_area); 525 break; 526 case 14: /* scm available notification */ 527 chsc_process_sei_scm_avail(sei_area); 528 break; 529 default: /* other stuff */ 530 CIO_CRW_EVENT(2, "chsc: sei nt0 unhandled cc=%d\n", 531 sei_area->cc); 532 break; 533 } 534 535 /* Check if we might have lost some information. */ 536 if (sei_area->flags & 0x40) { 537 CIO_CRW_EVENT(2, "chsc: event overflow\n"); 538 css_schedule_eval_all(); 539 } 540} 541 542static void chsc_process_event_information(struct chsc_sei *sei, u64 ntsm) 543{ 544 static int ntsm_unsupported; 545 546 while (true) { 547 memset(sei, 0, sizeof(*sei)); 548 sei->request.length = 0x0010; 549 sei->request.code = 0x000e; 550 if (!ntsm_unsupported) 551 sei->ntsm = ntsm; 552 553 if (chsc(sei)) 554 break; 555 556 if (sei->response.code != 0x0001) { 557 CIO_CRW_EVENT(2, "chsc: sei failed (rc=%04x, ntsm=%llx)\n", 558 sei->response.code, sei->ntsm); 559 560 if (sei->response.code == 3 && sei->ntsm) { 561 /* Fallback for old firmware. */ 562 ntsm_unsupported = 1; 563 continue; 564 } 565 break; 566 } 567 568 CIO_CRW_EVENT(2, "chsc: sei successful (nt=%d)\n", sei->nt); 569 switch (sei->nt) { 570 case 0: 571 chsc_process_sei_nt0(&sei->u.nt0_area); 572 break; 573 case 2: 574 chsc_process_sei_nt2(&sei->u.nt2_area); 575 break; 576 default: 577 CIO_CRW_EVENT(2, "chsc: unhandled nt: %d\n", sei->nt); 578 break; 579 } 580 581 if (!(sei->u.nt0_area.flags & 0x80)) 582 break; 583 } 584} 585 586/* 587 * Handle channel subsystem related CRWs. 588 * Use store event information to find out what's going on. 589 * 590 * Note: Access to sei_page is serialized through machine check handler 591 * thread, so no need for locking. 592 */ 593static void chsc_process_crw(struct crw *crw0, struct crw *crw1, int overflow) 594{ 595 struct chsc_sei *sei = sei_page; 596 597 if (overflow) { 598 css_schedule_eval_all(); 599 return; 600 } 601 CIO_CRW_EVENT(2, "CRW reports slct=%d, oflw=%d, " 602 "chn=%d, rsc=%X, anc=%d, erc=%X, rsid=%X\n", 603 crw0->slct, crw0->oflw, crw0->chn, crw0->rsc, crw0->anc, 604 crw0->erc, crw0->rsid); 605 606 CIO_TRACE_EVENT(2, "prcss"); 607 chsc_process_event_information(sei, CHSC_SEI_NT0 | CHSC_SEI_NT2); 608} 609 610void chsc_chp_online(struct chp_id chpid) 611{ 612 char dbf_txt[15]; 613 struct chp_link link; 614 615 sprintf(dbf_txt, "cadd%x.%02x", chpid.cssid, chpid.id); 616 CIO_TRACE_EVENT(2, dbf_txt); 617 618 if (chp_get_status(chpid) != 0) { 619 memset(&link, 0, sizeof(struct chp_link)); 620 link.chpid = chpid; 621 /* Wait until previous actions have settled. */ 622 css_wait_for_slow_path(); 623 for_each_subchannel_staged(__s390_process_res_acc, NULL, 624 &link); 625 css_schedule_reprobe(); 626 } 627} 628 629static void __s390_subchannel_vary_chpid(struct subchannel *sch, 630 struct chp_id chpid, int on) 631{ 632 unsigned long flags; 633 struct chp_link link; 634 635 memset(&link, 0, sizeof(struct chp_link)); 636 link.chpid = chpid; 637 spin_lock_irqsave(sch->lock, flags); 638 if (sch->driver && sch->driver->chp_event) 639 sch->driver->chp_event(sch, &link, 640 on ? CHP_VARY_ON : CHP_VARY_OFF); 641 spin_unlock_irqrestore(sch->lock, flags); 642} 643 644static int s390_subchannel_vary_chpid_off(struct subchannel *sch, void *data) 645{ 646 struct chp_id *chpid = data; 647 648 __s390_subchannel_vary_chpid(sch, *chpid, 0); 649 return 0; 650} 651 652static int s390_subchannel_vary_chpid_on(struct subchannel *sch, void *data) 653{ 654 struct chp_id *chpid = data; 655 656 __s390_subchannel_vary_chpid(sch, *chpid, 1); 657 return 0; 658} 659 660/** 661 * chsc_chp_vary - propagate channel-path vary operation to subchannels 662 * @chpid: channl-path ID 663 * @on: non-zero for vary online, zero for vary offline 664 */ 665int chsc_chp_vary(struct chp_id chpid, int on) 666{ 667 struct channel_path *chp = chpid_to_chp(chpid); 668 669 /* Wait until previous actions have settled. */ 670 css_wait_for_slow_path(); 671 /* 672 * Redo PathVerification on the devices the chpid connects to 673 */ 674 if (on) { 675 /* Try to update the channel path description. */ 676 chp_update_desc(chp); 677 for_each_subchannel_staged(s390_subchannel_vary_chpid_on, 678 NULL, &chpid); 679 css_schedule_reprobe(); 680 } else 681 for_each_subchannel_staged(s390_subchannel_vary_chpid_off, 682 NULL, &chpid); 683 684 return 0; 685} 686 687static void 688chsc_remove_cmg_attr(struct channel_subsystem *css) 689{ 690 int i; 691 692 for (i = 0; i <= __MAX_CHPID; i++) { 693 if (!css->chps[i]) 694 continue; 695 chp_remove_cmg_attr(css->chps[i]); 696 } 697} 698 699static int 700chsc_add_cmg_attr(struct channel_subsystem *css) 701{ 702 int i, ret; 703 704 ret = 0; 705 for (i = 0; i <= __MAX_CHPID; i++) { 706 if (!css->chps[i]) 707 continue; 708 ret = chp_add_cmg_attr(css->chps[i]); 709 if (ret) 710 goto cleanup; 711 } 712 return ret; 713cleanup: 714 for (--i; i >= 0; i--) { 715 if (!css->chps[i]) 716 continue; 717 chp_remove_cmg_attr(css->chps[i]); 718 } 719 return ret; 720} 721 722int __chsc_do_secm(struct channel_subsystem *css, int enable) 723{ 724 struct { 725 struct chsc_header request; 726 u32 operation_code : 2; 727 u32 : 30; 728 u32 key : 4; 729 u32 : 28; 730 u32 zeroes1; 731 u32 cub_addr1; 732 u32 zeroes2; 733 u32 cub_addr2; 734 u32 reserved[13]; 735 struct chsc_header response; 736 u32 status : 8; 737 u32 : 4; 738 u32 fmt : 4; 739 u32 : 16; 740 } __attribute__ ((packed)) *secm_area; 741 int ret, ccode; 742 743 spin_lock_irq(&chsc_page_lock); 744 memset(chsc_page, 0, PAGE_SIZE); 745 secm_area = chsc_page; 746 secm_area->request.length = 0x0050; 747 secm_area->request.code = 0x0016; 748 749 secm_area->key = PAGE_DEFAULT_KEY >> 4; 750 secm_area->cub_addr1 = (u64)(unsigned long)css->cub_addr1; 751 secm_area->cub_addr2 = (u64)(unsigned long)css->cub_addr2; 752 753 secm_area->operation_code = enable ? 0 : 1; 754 755 ccode = chsc(secm_area); 756 if (ccode > 0) { 757 ret = (ccode == 3) ? -ENODEV : -EBUSY; 758 goto out; 759 } 760 761 switch (secm_area->response.code) { 762 case 0x0102: 763 case 0x0103: 764 ret = -EINVAL; 765 break; 766 default: 767 ret = chsc_error_from_response(secm_area->response.code); 768 } 769 if (ret != 0) 770 CIO_CRW_EVENT(2, "chsc: secm failed (rc=%04x)\n", 771 secm_area->response.code); 772out: 773 spin_unlock_irq(&chsc_page_lock); 774 return ret; 775} 776 777int 778chsc_secm(struct channel_subsystem *css, int enable) 779{ 780 int ret; 781 782 if (enable && !css->cm_enabled) { 783 css->cub_addr1 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); 784 css->cub_addr2 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); 785 if (!css->cub_addr1 || !css->cub_addr2) { 786 free_page((unsigned long)css->cub_addr1); 787 free_page((unsigned long)css->cub_addr2); 788 return -ENOMEM; 789 } 790 } 791 ret = __chsc_do_secm(css, enable); 792 if (!ret) { 793 css->cm_enabled = enable; 794 if (css->cm_enabled) { 795 ret = chsc_add_cmg_attr(css); 796 if (ret) { 797 __chsc_do_secm(css, 0); 798 css->cm_enabled = 0; 799 } 800 } else 801 chsc_remove_cmg_attr(css); 802 } 803 if (!css->cm_enabled) { 804 free_page((unsigned long)css->cub_addr1); 805 free_page((unsigned long)css->cub_addr2); 806 } 807 return ret; 808} 809 810int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt, 811 int c, int m, void *page) 812{ 813 struct chsc_scpd *scpd_area; 814 int ccode, ret; 815 816 if ((rfmt == 1) && !css_general_characteristics.fcs) 817 return -EINVAL; 818 if ((rfmt == 2) && !css_general_characteristics.cib) 819 return -EINVAL; 820 821 memset(page, 0, PAGE_SIZE); 822 scpd_area = page; 823 scpd_area->request.length = 0x0010; 824 scpd_area->request.code = 0x0002; 825 scpd_area->cssid = chpid.cssid; 826 scpd_area->first_chpid = chpid.id; 827 scpd_area->last_chpid = chpid.id; 828 scpd_area->m = m; 829 scpd_area->c = c; 830 scpd_area->fmt = fmt; 831 scpd_area->rfmt = rfmt; 832 833 ccode = chsc(scpd_area); 834 if (ccode > 0) 835 return (ccode == 3) ? -ENODEV : -EBUSY; 836 837 ret = chsc_error_from_response(scpd_area->response.code); 838 if (ret) 839 CIO_CRW_EVENT(2, "chsc: scpd failed (rc=%04x)\n", 840 scpd_area->response.code); 841 return ret; 842} 843EXPORT_SYMBOL_GPL(chsc_determine_channel_path_desc); 844 845int chsc_determine_base_channel_path_desc(struct chp_id chpid, 846 struct channel_path_desc *desc) 847{ 848 struct chsc_response_struct *chsc_resp; 849 struct chsc_scpd *scpd_area; 850 unsigned long flags; 851 int ret; 852 853 spin_lock_irqsave(&chsc_page_lock, flags); 854 scpd_area = chsc_page; 855 ret = chsc_determine_channel_path_desc(chpid, 0, 0, 0, 0, scpd_area); 856 if (ret) 857 goto out; 858 chsc_resp = (void *)&scpd_area->response; 859 memcpy(desc, &chsc_resp->data, sizeof(*desc)); 860out: 861 spin_unlock_irqrestore(&chsc_page_lock, flags); 862 return ret; 863} 864 865int chsc_determine_fmt1_channel_path_desc(struct chp_id chpid, 866 struct channel_path_desc_fmt1 *desc) 867{ 868 struct chsc_response_struct *chsc_resp; 869 struct chsc_scpd *scpd_area; 870 unsigned long flags; 871 int ret; 872 873 spin_lock_irqsave(&chsc_page_lock, flags); 874 scpd_area = chsc_page; 875 ret = chsc_determine_channel_path_desc(chpid, 0, 0, 1, 0, scpd_area); 876 if (ret) 877 goto out; 878 chsc_resp = (void *)&scpd_area->response; 879 memcpy(desc, &chsc_resp->data, sizeof(*desc)); 880out: 881 spin_unlock_irqrestore(&chsc_page_lock, flags); 882 return ret; 883} 884 885static void 886chsc_initialize_cmg_chars(struct channel_path *chp, u8 cmcv, 887 struct cmg_chars *chars) 888{ 889 struct cmg_chars *cmg_chars; 890 int i, mask; 891 892 cmg_chars = chp->cmg_chars; 893 for (i = 0; i < NR_MEASUREMENT_CHARS; i++) { 894 mask = 0x80 >> (i + 3); 895 if (cmcv & mask) 896 cmg_chars->values[i] = chars->values[i]; 897 else 898 cmg_chars->values[i] = 0; 899 } 900} 901 902int chsc_get_channel_measurement_chars(struct channel_path *chp) 903{ 904 struct cmg_chars *cmg_chars; 905 int ccode, ret; 906 907 struct { 908 struct chsc_header request; 909 u32 : 24; 910 u32 first_chpid : 8; 911 u32 : 24; 912 u32 last_chpid : 8; 913 u32 zeroes1; 914 struct chsc_header response; 915 u32 zeroes2; 916 u32 not_valid : 1; 917 u32 shared : 1; 918 u32 : 22; 919 u32 chpid : 8; 920 u32 cmcv : 5; 921 u32 : 11; 922 u32 cmgq : 8; 923 u32 cmg : 8; 924 u32 zeroes3; 925 u32 data[NR_MEASUREMENT_CHARS]; 926 } __attribute__ ((packed)) *scmc_area; 927 928 chp->cmg_chars = NULL; 929 cmg_chars = kmalloc(sizeof(*cmg_chars), GFP_KERNEL); 930 if (!cmg_chars) 931 return -ENOMEM; 932 933 spin_lock_irq(&chsc_page_lock); 934 memset(chsc_page, 0, PAGE_SIZE); 935 scmc_area = chsc_page; 936 scmc_area->request.length = 0x0010; 937 scmc_area->request.code = 0x0022; 938 scmc_area->first_chpid = chp->chpid.id; 939 scmc_area->last_chpid = chp->chpid.id; 940 941 ccode = chsc(scmc_area); 942 if (ccode > 0) { 943 ret = (ccode == 3) ? -ENODEV : -EBUSY; 944 goto out; 945 } 946 947 ret = chsc_error_from_response(scmc_area->response.code); 948 if (ret) { 949 CIO_CRW_EVENT(2, "chsc: scmc failed (rc=%04x)\n", 950 scmc_area->response.code); 951 goto out; 952 } 953 if (scmc_area->not_valid) { 954 chp->cmg = -1; 955 chp->shared = -1; 956 goto out; 957 } 958 chp->cmg = scmc_area->cmg; 959 chp->shared = scmc_area->shared; 960 if (chp->cmg != 2 && chp->cmg != 3) { 961 /* No cmg-dependent data. */ 962 goto out; 963 } 964 chp->cmg_chars = cmg_chars; 965 chsc_initialize_cmg_chars(chp, scmc_area->cmcv, 966 (struct cmg_chars *) &scmc_area->data); 967out: 968 spin_unlock_irq(&chsc_page_lock); 969 if (!chp->cmg_chars) 970 kfree(cmg_chars); 971 972 return ret; 973} 974 975int __init chsc_init(void) 976{ 977 int ret; 978 979 sei_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); 980 chsc_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); 981 if (!sei_page || !chsc_page) { 982 ret = -ENOMEM; 983 goto out_err; 984 } 985 ret = crw_register_handler(CRW_RSC_CSS, chsc_process_crw); 986 if (ret) 987 goto out_err; 988 return ret; 989out_err: 990 free_page((unsigned long)chsc_page); 991 free_page((unsigned long)sei_page); 992 return ret; 993} 994 995void __init chsc_init_cleanup(void) 996{ 997 crw_unregister_handler(CRW_RSC_CSS); 998 free_page((unsigned long)chsc_page); 999 free_page((unsigned long)sei_page); 1000} 1001 1002int chsc_enable_facility(int operation_code) 1003{ 1004 unsigned long flags; 1005 int ret; 1006 struct { 1007 struct chsc_header request; 1008 u8 reserved1:4; 1009 u8 format:4; 1010 u8 reserved2; 1011 u16 operation_code; 1012 u32 reserved3; 1013 u32 reserved4; 1014 u32 operation_data_area[252]; 1015 struct chsc_header response; 1016 u32 reserved5:4; 1017 u32 format2:4; 1018 u32 reserved6:24; 1019 } __attribute__ ((packed)) *sda_area; 1020 1021 spin_lock_irqsave(&chsc_page_lock, flags); 1022 memset(chsc_page, 0, PAGE_SIZE); 1023 sda_area = chsc_page; 1024 sda_area->request.length = 0x0400; 1025 sda_area->request.code = 0x0031; 1026 sda_area->operation_code = operation_code; 1027 1028 ret = chsc(sda_area); 1029 if (ret > 0) { 1030 ret = (ret == 3) ? -ENODEV : -EBUSY; 1031 goto out; 1032 } 1033 1034 switch (sda_area->response.code) { 1035 case 0x0101: 1036 ret = -EOPNOTSUPP; 1037 break; 1038 default: 1039 ret = chsc_error_from_response(sda_area->response.code); 1040 } 1041 if (ret != 0) 1042 CIO_CRW_EVENT(2, "chsc: sda (oc=%x) failed (rc=%04x)\n", 1043 operation_code, sda_area->response.code); 1044out: 1045 spin_unlock_irqrestore(&chsc_page_lock, flags); 1046 return ret; 1047} 1048 1049struct css_general_char css_general_characteristics; 1050struct css_chsc_char css_chsc_characteristics; 1051 1052int __init 1053chsc_determine_css_characteristics(void) 1054{ 1055 int result; 1056 struct { 1057 struct chsc_header request; 1058 u32 reserved1; 1059 u32 reserved2; 1060 u32 reserved3; 1061 struct chsc_header response; 1062 u32 reserved4; 1063 u32 general_char[510]; 1064 u32 chsc_char[508]; 1065 } __attribute__ ((packed)) *scsc_area; 1066 1067 spin_lock_irq(&chsc_page_lock); 1068 memset(chsc_page, 0, PAGE_SIZE); 1069 scsc_area = chsc_page; 1070 scsc_area->request.length = 0x0010; 1071 scsc_area->request.code = 0x0010; 1072 1073 result = chsc(scsc_area); 1074 if (result) { 1075 result = (result == 3) ? -ENODEV : -EBUSY; 1076 goto exit; 1077 } 1078 1079 result = chsc_error_from_response(scsc_area->response.code); 1080 if (result == 0) { 1081 memcpy(&css_general_characteristics, scsc_area->general_char, 1082 sizeof(css_general_characteristics)); 1083 memcpy(&css_chsc_characteristics, scsc_area->chsc_char, 1084 sizeof(css_chsc_characteristics)); 1085 } else 1086 CIO_CRW_EVENT(2, "chsc: scsc failed (rc=%04x)\n", 1087 scsc_area->response.code); 1088exit: 1089 spin_unlock_irq(&chsc_page_lock); 1090 return result; 1091} 1092 1093EXPORT_SYMBOL_GPL(css_general_characteristics); 1094EXPORT_SYMBOL_GPL(css_chsc_characteristics); 1095 1096int chsc_sstpc(void *page, unsigned int op, u16 ctrl) 1097{ 1098 struct { 1099 struct chsc_header request; 1100 unsigned int rsvd0; 1101 unsigned int op : 8; 1102 unsigned int rsvd1 : 8; 1103 unsigned int ctrl : 16; 1104 unsigned int rsvd2[5]; 1105 struct chsc_header response; 1106 unsigned int rsvd3[7]; 1107 } __attribute__ ((packed)) *rr; 1108 int rc; 1109 1110 memset(page, 0, PAGE_SIZE); 1111 rr = page; 1112 rr->request.length = 0x0020; 1113 rr->request.code = 0x0033; 1114 rr->op = op; 1115 rr->ctrl = ctrl; 1116 rc = chsc(rr); 1117 if (rc) 1118 return -EIO; 1119 rc = (rr->response.code == 0x0001) ? 0 : -EIO; 1120 return rc; 1121} 1122 1123int chsc_sstpi(void *page, void *result, size_t size) 1124{ 1125 struct { 1126 struct chsc_header request; 1127 unsigned int rsvd0[3]; 1128 struct chsc_header response; 1129 char data[size]; 1130 } __attribute__ ((packed)) *rr; 1131 int rc; 1132 1133 memset(page, 0, PAGE_SIZE); 1134 rr = page; 1135 rr->request.length = 0x0010; 1136 rr->request.code = 0x0038; 1137 rc = chsc(rr); 1138 if (rc) 1139 return -EIO; 1140 memcpy(result, &rr->data, size); 1141 return (rr->response.code == 0x0001) ? 0 : -EIO; 1142} 1143 1144int chsc_siosl(struct subchannel_id schid) 1145{ 1146 struct { 1147 struct chsc_header request; 1148 u32 word1; 1149 struct subchannel_id sid; 1150 u32 word3; 1151 struct chsc_header response; 1152 u32 word[11]; 1153 } __attribute__ ((packed)) *siosl_area; 1154 unsigned long flags; 1155 int ccode; 1156 int rc; 1157 1158 spin_lock_irqsave(&chsc_page_lock, flags); 1159 memset(chsc_page, 0, PAGE_SIZE); 1160 siosl_area = chsc_page; 1161 siosl_area->request.length = 0x0010; 1162 siosl_area->request.code = 0x0046; 1163 siosl_area->word1 = 0x80000000; 1164 siosl_area->sid = schid; 1165 1166 ccode = chsc(siosl_area); 1167 if (ccode > 0) { 1168 if (ccode == 3) 1169 rc = -ENODEV; 1170 else 1171 rc = -EBUSY; 1172 CIO_MSG_EVENT(2, "chsc: chsc failed for 0.%x.%04x (ccode=%d)\n", 1173 schid.ssid, schid.sch_no, ccode); 1174 goto out; 1175 } 1176 rc = chsc_error_from_response(siosl_area->response.code); 1177 if (rc) 1178 CIO_MSG_EVENT(2, "chsc: siosl failed for 0.%x.%04x (rc=%04x)\n", 1179 schid.ssid, schid.sch_no, 1180 siosl_area->response.code); 1181 else 1182 CIO_MSG_EVENT(4, "chsc: siosl succeeded for 0.%x.%04x\n", 1183 schid.ssid, schid.sch_no); 1184out: 1185 spin_unlock_irqrestore(&chsc_page_lock, flags); 1186 return rc; 1187} 1188EXPORT_SYMBOL_GPL(chsc_siosl); 1189 1190/** 1191 * chsc_scm_info() - store SCM information (SSI) 1192 * @scm_area: request and response block for SSI 1193 * @token: continuation token 1194 * 1195 * Returns 0 on success. 1196 */ 1197int chsc_scm_info(struct chsc_scm_info *scm_area, u64 token) 1198{ 1199 int ccode, ret; 1200 1201 memset(scm_area, 0, sizeof(*scm_area)); 1202 scm_area->request.length = 0x0020; 1203 scm_area->request.code = 0x004C; 1204 scm_area->reqtok = token; 1205 1206 ccode = chsc(scm_area); 1207 if (ccode > 0) { 1208 ret = (ccode == 3) ? -ENODEV : -EBUSY; 1209 goto out; 1210 } 1211 ret = chsc_error_from_response(scm_area->response.code); 1212 if (ret != 0) 1213 CIO_MSG_EVENT(2, "chsc: scm info failed (rc=%04x)\n", 1214 scm_area->response.code); 1215out: 1216 return ret; 1217} 1218EXPORT_SYMBOL_GPL(chsc_scm_info); 1219 1220/** 1221 * chsc_pnso_brinfo() - Perform Network-Subchannel Operation, Bridge Info. 1222 * @schid: id of the subchannel on which PNSO is performed 1223 * @brinfo_area: request and response block for the operation 1224 * @resume_token: resume token for multiblock response 1225 * @cnc: Boolean change-notification control 1226 * 1227 * brinfo_area must be allocated by the caller with get_zeroed_page(GFP_KERNEL) 1228 * 1229 * Returns 0 on success. 1230 */ 1231int chsc_pnso_brinfo(struct subchannel_id schid, 1232 struct chsc_pnso_area *brinfo_area, 1233 struct chsc_brinfo_resume_token resume_token, 1234 int cnc) 1235{ 1236 memset(brinfo_area, 0, sizeof(*brinfo_area)); 1237 brinfo_area->request.length = 0x0030; 1238 brinfo_area->request.code = 0x003d; /* network-subchannel operation */ 1239 brinfo_area->m = schid.m; 1240 brinfo_area->ssid = schid.ssid; 1241 brinfo_area->sch = schid.sch_no; 1242 brinfo_area->cssid = schid.cssid; 1243 brinfo_area->oc = 0; /* Store-network-bridging-information list */ 1244 brinfo_area->resume_token = resume_token; 1245 brinfo_area->n = (cnc != 0); 1246 if (chsc(brinfo_area)) 1247 return -EIO; 1248 return chsc_error_from_response(brinfo_area->response.code); 1249} 1250EXPORT_SYMBOL_GPL(chsc_pnso_brinfo); 1251