1 /* 2 * IBM/3270 Driver - core functions. 3 * 4 * Author(s): 5 * Original 3270 Code for 2.4 written by Richard Hitt (UTS Global) 6 * Rewritten for 2.5 by Martin Schwidefsky <schwidefsky@de.ibm.com> 7 * Copyright IBM Corp. 2003, 2009 8 */ 9 10 #include <linux/module.h> 11 #include <linux/err.h> 12 #include <linux/init.h> 13 #include <linux/interrupt.h> 14 #include <linux/list.h> 15 #include <linux/slab.h> 16 #include <linux/types.h> 17 #include <linux/wait.h> 18 19 #include <asm/ccwdev.h> 20 #include <asm/cio.h> 21 #include <asm/ebcdic.h> 22 #include <asm/diag.h> 23 24 #include "raw3270.h" 25 26 #include <linux/major.h> 27 #include <linux/kdev_t.h> 28 #include <linux/device.h> 29 #include <linux/mutex.h> 30 31 struct class *class3270; 32 33 /* The main 3270 data structure. */ 34 struct raw3270 { 35 struct list_head list; 36 struct ccw_device *cdev; 37 int minor; 38 39 short model, rows, cols; 40 unsigned int state; 41 unsigned long flags; 42 43 struct list_head req_queue; /* Request queue. */ 44 struct list_head view_list; /* List of available views. */ 45 struct raw3270_view *view; /* Active view. */ 46 47 struct timer_list timer; /* Device timer. */ 48 49 unsigned char *ascebc; /* ascii -> ebcdic table */ 50 51 struct raw3270_view init_view; 52 struct raw3270_request init_reset; 53 struct raw3270_request init_readpart; 54 struct raw3270_request init_readmod; 55 unsigned char init_data[256]; 56 }; 57 58 /* raw3270->state */ 59 #define RAW3270_STATE_INIT 0 /* Initial state */ 60 #define RAW3270_STATE_RESET 1 /* Reset command is pending */ 61 #define RAW3270_STATE_W4ATTN 2 /* Wait for attention interrupt */ 62 #define RAW3270_STATE_READMOD 3 /* Read partition is pending */ 63 #define RAW3270_STATE_READY 4 /* Device is usable by views */ 64 65 /* raw3270->flags */ 66 #define RAW3270_FLAGS_14BITADDR 0 /* 14-bit buffer addresses */ 67 #define RAW3270_FLAGS_BUSY 1 /* Device busy, leave it alone */ 68 #define RAW3270_FLAGS_CONSOLE 2 /* Device is the console. */ 69 #define RAW3270_FLAGS_FROZEN 3 /* set if 3270 is frozen for suspend */ 70 71 /* Semaphore to protect global data of raw3270 (devices, views, etc). */ 72 static DEFINE_MUTEX(raw3270_mutex); 73 74 /* List of 3270 devices. */ 75 static LIST_HEAD(raw3270_devices); 76 77 /* 78 * Flag to indicate if the driver has been registered. Some operations 79 * like waiting for the end of i/o need to be done differently as long 80 * as the kernel is still starting up (console support). 81 */ 82 static int raw3270_registered; 83 84 /* Module parameters */ 85 static bool tubxcorrect = 0; 86 module_param(tubxcorrect, bool, 0); 87 88 /* 89 * Wait queue for device init/delete, view delete. 90 */ 91 DECLARE_WAIT_QUEUE_HEAD(raw3270_wait_queue); 92 93 /* 94 * Encode array for 12 bit 3270 addresses. 95 */ 96 static unsigned char raw3270_ebcgraf[64] = { 97 0x40, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 98 0xc8, 0xc9, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, 99 0x50, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 100 0xd8, 0xd9, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, 101 0x60, 0x61, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 102 0xe8, 0xe9, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 103 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 104 0xf8, 0xf9, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f 105 }; 106 107 static inline int raw3270_state_ready(struct raw3270 *rp) 108 { 109 return rp->state == RAW3270_STATE_READY; 110 } 111 112 static inline int raw3270_state_final(struct raw3270 *rp) 113 { 114 return rp->state == RAW3270_STATE_INIT || 115 rp->state == RAW3270_STATE_READY; 116 } 117 118 void 119 raw3270_buffer_address(struct raw3270 *rp, char *cp, unsigned short addr) 120 { 121 if (test_bit(RAW3270_FLAGS_14BITADDR, &rp->flags)) { 122 cp[0] = (addr >> 8) & 0x3f; 123 cp[1] = addr & 0xff; 124 } else { 125 cp[0] = raw3270_ebcgraf[(addr >> 6) & 0x3f]; 126 cp[1] = raw3270_ebcgraf[addr & 0x3f]; 127 } 128 } 129 130 /* 131 * Allocate a new 3270 ccw request 132 */ 133 struct raw3270_request * 134 raw3270_request_alloc(size_t size) 135 { 136 struct raw3270_request *rq; 137 138 /* Allocate request structure */ 139 rq = kzalloc(sizeof(struct raw3270_request), GFP_KERNEL | GFP_DMA); 140 if (!rq) 141 return ERR_PTR(-ENOMEM); 142 143 /* alloc output buffer. */ 144 if (size > 0) { 145 rq->buffer = kmalloc(size, GFP_KERNEL | GFP_DMA); 146 if (!rq->buffer) { 147 kfree(rq); 148 return ERR_PTR(-ENOMEM); 149 } 150 } 151 rq->size = size; 152 INIT_LIST_HEAD(&rq->list); 153 154 /* 155 * Setup ccw. 156 */ 157 rq->ccw.cda = __pa(rq->buffer); 158 rq->ccw.flags = CCW_FLAG_SLI; 159 160 return rq; 161 } 162 163 /* 164 * Free 3270 ccw request 165 */ 166 void 167 raw3270_request_free (struct raw3270_request *rq) 168 { 169 kfree(rq->buffer); 170 kfree(rq); 171 } 172 173 /* 174 * Reset request to initial state. 175 */ 176 void 177 raw3270_request_reset(struct raw3270_request *rq) 178 { 179 BUG_ON(!list_empty(&rq->list)); 180 rq->ccw.cmd_code = 0; 181 rq->ccw.count = 0; 182 rq->ccw.cda = __pa(rq->buffer); 183 rq->ccw.flags = CCW_FLAG_SLI; 184 rq->rescnt = 0; 185 rq->rc = 0; 186 } 187 188 /* 189 * Set command code to ccw of a request. 190 */ 191 void 192 raw3270_request_set_cmd(struct raw3270_request *rq, u8 cmd) 193 { 194 rq->ccw.cmd_code = cmd; 195 } 196 197 /* 198 * Add data fragment to output buffer. 199 */ 200 int 201 raw3270_request_add_data(struct raw3270_request *rq, void *data, size_t size) 202 { 203 if (size + rq->ccw.count > rq->size) 204 return -E2BIG; 205 memcpy(rq->buffer + rq->ccw.count, data, size); 206 rq->ccw.count += size; 207 return 0; 208 } 209 210 /* 211 * Set address/length pair to ccw of a request. 212 */ 213 void 214 raw3270_request_set_data(struct raw3270_request *rq, void *data, size_t size) 215 { 216 rq->ccw.cda = __pa(data); 217 rq->ccw.count = size; 218 } 219 220 /* 221 * Set idal buffer to ccw of a request. 222 */ 223 void 224 raw3270_request_set_idal(struct raw3270_request *rq, struct idal_buffer *ib) 225 { 226 rq->ccw.cda = __pa(ib->data); 227 rq->ccw.count = ib->size; 228 rq->ccw.flags |= CCW_FLAG_IDA; 229 } 230 231 /* 232 * Stop running ccw. 233 */ 234 static int 235 __raw3270_halt_io(struct raw3270 *rp, struct raw3270_request *rq) 236 { 237 int retries; 238 int rc; 239 240 if (raw3270_request_final(rq)) 241 return 0; 242 /* Check if interrupt has already been processed */ 243 for (retries = 0; retries < 5; retries++) { 244 if (retries < 2) 245 rc = ccw_device_halt(rp->cdev, (long) rq); 246 else 247 rc = ccw_device_clear(rp->cdev, (long) rq); 248 if (rc == 0) 249 break; /* termination successful */ 250 } 251 return rc; 252 } 253 254 /* 255 * Add the request to the request queue, try to start it if the 256 * 3270 device is idle. Return without waiting for end of i/o. 257 */ 258 static int 259 __raw3270_start(struct raw3270 *rp, struct raw3270_view *view, 260 struct raw3270_request *rq) 261 { 262 rq->view = view; 263 raw3270_get_view(view); 264 if (list_empty(&rp->req_queue) && 265 !test_bit(RAW3270_FLAGS_BUSY, &rp->flags)) { 266 /* No other requests are on the queue. Start this one. */ 267 rq->rc = ccw_device_start(rp->cdev, &rq->ccw, 268 (unsigned long) rq, 0, 0); 269 if (rq->rc) { 270 raw3270_put_view(view); 271 return rq->rc; 272 } 273 } 274 list_add_tail(&rq->list, &rp->req_queue); 275 return 0; 276 } 277 278 int 279 raw3270_view_active(struct raw3270_view *view) 280 { 281 struct raw3270 *rp = view->dev; 282 283 return rp && rp->view == view && 284 !test_bit(RAW3270_FLAGS_FROZEN, &rp->flags); 285 } 286 287 int 288 raw3270_start(struct raw3270_view *view, struct raw3270_request *rq) 289 { 290 unsigned long flags; 291 struct raw3270 *rp; 292 int rc; 293 294 spin_lock_irqsave(get_ccwdev_lock(view->dev->cdev), flags); 295 rp = view->dev; 296 if (!rp || rp->view != view || 297 test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) 298 rc = -EACCES; 299 else if (!raw3270_state_ready(rp)) 300 rc = -EBUSY; 301 else 302 rc = __raw3270_start(rp, view, rq); 303 spin_unlock_irqrestore(get_ccwdev_lock(view->dev->cdev), flags); 304 return rc; 305 } 306 307 int 308 raw3270_start_locked(struct raw3270_view *view, struct raw3270_request *rq) 309 { 310 struct raw3270 *rp; 311 int rc; 312 313 rp = view->dev; 314 if (!rp || rp->view != view || 315 test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) 316 rc = -EACCES; 317 else if (!raw3270_state_ready(rp)) 318 rc = -EBUSY; 319 else 320 rc = __raw3270_start(rp, view, rq); 321 return rc; 322 } 323 324 int 325 raw3270_start_irq(struct raw3270_view *view, struct raw3270_request *rq) 326 { 327 struct raw3270 *rp; 328 329 rp = view->dev; 330 rq->view = view; 331 raw3270_get_view(view); 332 list_add_tail(&rq->list, &rp->req_queue); 333 return 0; 334 } 335 336 /* 337 * 3270 interrupt routine, called from the ccw_device layer 338 */ 339 static void 340 raw3270_irq (struct ccw_device *cdev, unsigned long intparm, struct irb *irb) 341 { 342 struct raw3270 *rp; 343 struct raw3270_view *view; 344 struct raw3270_request *rq; 345 int rc; 346 347 rp = dev_get_drvdata(&cdev->dev); 348 if (!rp) 349 return; 350 rq = (struct raw3270_request *) intparm; 351 view = rq ? rq->view : rp->view; 352 353 if (IS_ERR(irb)) 354 rc = RAW3270_IO_RETRY; 355 else if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) { 356 rq->rc = -EIO; 357 rc = RAW3270_IO_DONE; 358 } else if (irb->scsw.cmd.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END | 359 DEV_STAT_UNIT_EXCEP)) { 360 /* Handle CE-DE-UE and subsequent UDE */ 361 set_bit(RAW3270_FLAGS_BUSY, &rp->flags); 362 rc = RAW3270_IO_BUSY; 363 } else if (test_bit(RAW3270_FLAGS_BUSY, &rp->flags)) { 364 /* Wait for UDE if busy flag is set. */ 365 if (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) { 366 clear_bit(RAW3270_FLAGS_BUSY, &rp->flags); 367 /* Got it, now retry. */ 368 rc = RAW3270_IO_RETRY; 369 } else 370 rc = RAW3270_IO_BUSY; 371 } else if (view) 372 rc = view->fn->intv(view, rq, irb); 373 else 374 rc = RAW3270_IO_DONE; 375 376 switch (rc) { 377 case RAW3270_IO_DONE: 378 break; 379 case RAW3270_IO_BUSY: 380 /* 381 * Intervention required by the operator. We have to wait 382 * for unsolicited device end. 383 */ 384 return; 385 case RAW3270_IO_RETRY: 386 if (!rq) 387 break; 388 rq->rc = ccw_device_start(rp->cdev, &rq->ccw, 389 (unsigned long) rq, 0, 0); 390 if (rq->rc == 0) 391 return; /* Successfully restarted. */ 392 break; 393 case RAW3270_IO_STOP: 394 if (!rq) 395 break; 396 __raw3270_halt_io(rp, rq); 397 rq->rc = -EIO; 398 break; 399 default: 400 BUG(); 401 } 402 if (rq) { 403 BUG_ON(list_empty(&rq->list)); 404 /* The request completed, remove from queue and do callback. */ 405 list_del_init(&rq->list); 406 if (rq->callback) 407 rq->callback(rq, rq->callback_data); 408 /* Do put_device for get_device in raw3270_start. */ 409 raw3270_put_view(view); 410 } 411 /* 412 * Try to start each request on request queue until one is 413 * started successful. 414 */ 415 while (!list_empty(&rp->req_queue)) { 416 rq = list_entry(rp->req_queue.next,struct raw3270_request,list); 417 rq->rc = ccw_device_start(rp->cdev, &rq->ccw, 418 (unsigned long) rq, 0, 0); 419 if (rq->rc == 0) 420 break; 421 /* Start failed. Remove request and do callback. */ 422 list_del_init(&rq->list); 423 if (rq->callback) 424 rq->callback(rq, rq->callback_data); 425 /* Do put_device for get_device in raw3270_start. */ 426 raw3270_put_view(view); 427 } 428 } 429 430 /* 431 * To determine the size of the 3270 device we need to do: 432 * 1) send a 'read partition' data stream to the device 433 * 2) wait for the attn interrupt that precedes the query reply 434 * 3) do a read modified to get the query reply 435 * To make things worse we have to cope with intervention 436 * required (3270 device switched to 'stand-by') and command 437 * rejects (old devices that can't do 'read partition'). 438 */ 439 struct raw3270_ua { /* Query Reply structure for Usable Area */ 440 struct { /* Usable Area Query Reply Base */ 441 short l; /* Length of this structured field */ 442 char sfid; /* 0x81 if Query Reply */ 443 char qcode; /* 0x81 if Usable Area */ 444 char flags0; 445 char flags1; 446 short w; /* Width of usable area */ 447 short h; /* Heigth of usavle area */ 448 char units; /* 0x00:in; 0x01:mm */ 449 int xr; 450 int yr; 451 char aw; 452 char ah; 453 short buffsz; /* Character buffer size, bytes */ 454 char xmin; 455 char ymin; 456 char xmax; 457 char ymax; 458 } __attribute__ ((packed)) uab; 459 struct { /* Alternate Usable Area Self-Defining Parameter */ 460 char l; /* Length of this Self-Defining Parm */ 461 char sdpid; /* 0x02 if Alternate Usable Area */ 462 char res; 463 char auaid; /* 0x01 is Id for the A U A */ 464 short wauai; /* Width of AUAi */ 465 short hauai; /* Height of AUAi */ 466 char auaunits; /* 0x00:in, 0x01:mm */ 467 int auaxr; 468 int auayr; 469 char awauai; 470 char ahauai; 471 } __attribute__ ((packed)) aua; 472 } __attribute__ ((packed)); 473 474 static void 475 raw3270_size_device_vm(struct raw3270 *rp) 476 { 477 int rc, model; 478 struct ccw_dev_id dev_id; 479 struct diag210 diag_data; 480 481 ccw_device_get_id(rp->cdev, &dev_id); 482 diag_data.vrdcdvno = dev_id.devno; 483 diag_data.vrdclen = sizeof(struct diag210); 484 rc = diag210(&diag_data); 485 model = diag_data.vrdccrmd; 486 /* Use default model 2 if the size could not be detected */ 487 if (rc || model < 2 || model > 5) 488 model = 2; 489 switch (model) { 490 case 2: 491 rp->model = model; 492 rp->rows = 24; 493 rp->cols = 80; 494 break; 495 case 3: 496 rp->model = model; 497 rp->rows = 32; 498 rp->cols = 80; 499 break; 500 case 4: 501 rp->model = model; 502 rp->rows = 43; 503 rp->cols = 80; 504 break; 505 case 5: 506 rp->model = model; 507 rp->rows = 27; 508 rp->cols = 132; 509 break; 510 } 511 } 512 513 static void 514 raw3270_size_device(struct raw3270 *rp) 515 { 516 struct raw3270_ua *uap; 517 518 /* Got a Query Reply */ 519 uap = (struct raw3270_ua *) (rp->init_data + 1); 520 /* Paranoia check. */ 521 if (rp->init_readmod.rc || rp->init_data[0] != 0x88 || 522 uap->uab.qcode != 0x81) { 523 /* Couldn't detect size. Use default model 2. */ 524 rp->model = 2; 525 rp->rows = 24; 526 rp->cols = 80; 527 return; 528 } 529 /* Copy rows/columns of default Usable Area */ 530 rp->rows = uap->uab.h; 531 rp->cols = uap->uab.w; 532 /* Check for 14 bit addressing */ 533 if ((uap->uab.flags0 & 0x0d) == 0x01) 534 set_bit(RAW3270_FLAGS_14BITADDR, &rp->flags); 535 /* Check for Alternate Usable Area */ 536 if (uap->uab.l == sizeof(struct raw3270_ua) && 537 uap->aua.sdpid == 0x02) { 538 rp->rows = uap->aua.hauai; 539 rp->cols = uap->aua.wauai; 540 } 541 /* Try to find a model. */ 542 rp->model = 0; 543 if (rp->rows == 24 && rp->cols == 80) 544 rp->model = 2; 545 if (rp->rows == 32 && rp->cols == 80) 546 rp->model = 3; 547 if (rp->rows == 43 && rp->cols == 80) 548 rp->model = 4; 549 if (rp->rows == 27 && rp->cols == 132) 550 rp->model = 5; 551 } 552 553 static void 554 raw3270_size_device_done(struct raw3270 *rp) 555 { 556 struct raw3270_view *view; 557 558 rp->view = NULL; 559 rp->state = RAW3270_STATE_READY; 560 /* Notify views about new size */ 561 list_for_each_entry(view, &rp->view_list, list) 562 if (view->fn->resize) 563 view->fn->resize(view, rp->model, rp->rows, rp->cols); 564 /* Setup processing done, now activate a view */ 565 list_for_each_entry(view, &rp->view_list, list) { 566 rp->view = view; 567 if (view->fn->activate(view) == 0) 568 break; 569 rp->view = NULL; 570 } 571 } 572 573 static void 574 raw3270_read_modified_cb(struct raw3270_request *rq, void *data) 575 { 576 struct raw3270 *rp = rq->view->dev; 577 578 raw3270_size_device(rp); 579 raw3270_size_device_done(rp); 580 } 581 582 static void 583 raw3270_read_modified(struct raw3270 *rp) 584 { 585 if (rp->state != RAW3270_STATE_W4ATTN) 586 return; 587 /* Use 'read modified' to get the result of a read partition. */ 588 memset(&rp->init_readmod, 0, sizeof(rp->init_readmod)); 589 memset(&rp->init_data, 0, sizeof(rp->init_data)); 590 rp->init_readmod.ccw.cmd_code = TC_READMOD; 591 rp->init_readmod.ccw.flags = CCW_FLAG_SLI; 592 rp->init_readmod.ccw.count = sizeof(rp->init_data); 593 rp->init_readmod.ccw.cda = (__u32) __pa(rp->init_data); 594 rp->init_readmod.callback = raw3270_read_modified_cb; 595 rp->state = RAW3270_STATE_READMOD; 596 raw3270_start_irq(&rp->init_view, &rp->init_readmod); 597 } 598 599 static void 600 raw3270_writesf_readpart(struct raw3270 *rp) 601 { 602 static const unsigned char wbuf[] = 603 { 0x00, 0x07, 0x01, 0xff, 0x03, 0x00, 0x81 }; 604 605 /* Store 'read partition' data stream to init_data */ 606 memset(&rp->init_readpart, 0, sizeof(rp->init_readpart)); 607 memset(&rp->init_data, 0, sizeof(rp->init_data)); 608 memcpy(&rp->init_data, wbuf, sizeof(wbuf)); 609 rp->init_readpart.ccw.cmd_code = TC_WRITESF; 610 rp->init_readpart.ccw.flags = CCW_FLAG_SLI; 611 rp->init_readpart.ccw.count = sizeof(wbuf); 612 rp->init_readpart.ccw.cda = (__u32) __pa(&rp->init_data); 613 rp->state = RAW3270_STATE_W4ATTN; 614 raw3270_start_irq(&rp->init_view, &rp->init_readpart); 615 } 616 617 /* 618 * Device reset 619 */ 620 static void 621 raw3270_reset_device_cb(struct raw3270_request *rq, void *data) 622 { 623 struct raw3270 *rp = rq->view->dev; 624 625 if (rp->state != RAW3270_STATE_RESET) 626 return; 627 if (rq->rc) { 628 /* Reset command failed. */ 629 rp->state = RAW3270_STATE_INIT; 630 } else if (MACHINE_IS_VM) { 631 raw3270_size_device_vm(rp); 632 raw3270_size_device_done(rp); 633 } else 634 raw3270_writesf_readpart(rp); 635 memset(&rp->init_reset, 0, sizeof(rp->init_reset)); 636 memset(&rp->init_data, 0, sizeof(rp->init_data)); 637 } 638 639 static int 640 __raw3270_reset_device(struct raw3270 *rp) 641 { 642 int rc; 643 644 /* Check if reset is already pending */ 645 if (rp->init_reset.view) 646 return -EBUSY; 647 /* Store reset data stream to init_data/init_reset */ 648 rp->init_data[0] = TW_KR; 649 rp->init_reset.ccw.cmd_code = TC_EWRITEA; 650 rp->init_reset.ccw.flags = CCW_FLAG_SLI; 651 rp->init_reset.ccw.count = 1; 652 rp->init_reset.ccw.cda = (__u32) __pa(rp->init_data); 653 rp->init_reset.callback = raw3270_reset_device_cb; 654 rc = __raw3270_start(rp, &rp->init_view, &rp->init_reset); 655 if (rc == 0 && rp->state == RAW3270_STATE_INIT) 656 rp->state = RAW3270_STATE_RESET; 657 return rc; 658 } 659 660 static int 661 raw3270_reset_device(struct raw3270 *rp) 662 { 663 unsigned long flags; 664 int rc; 665 666 spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); 667 rc = __raw3270_reset_device(rp); 668 spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); 669 return rc; 670 } 671 672 int 673 raw3270_reset(struct raw3270_view *view) 674 { 675 struct raw3270 *rp; 676 int rc; 677 678 rp = view->dev; 679 if (!rp || rp->view != view || 680 test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) 681 rc = -EACCES; 682 else if (!raw3270_state_ready(rp)) 683 rc = -EBUSY; 684 else 685 rc = raw3270_reset_device(view->dev); 686 return rc; 687 } 688 689 static int 690 raw3270_init_irq(struct raw3270_view *view, struct raw3270_request *rq, 691 struct irb *irb) 692 { 693 struct raw3270 *rp; 694 695 /* 696 * Unit-Check Processing: 697 * Expect Command Reject or Intervention Required. 698 */ 699 if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) { 700 /* Request finished abnormally. */ 701 if (irb->ecw[0] & SNS0_INTERVENTION_REQ) { 702 set_bit(RAW3270_FLAGS_BUSY, &view->dev->flags); 703 return RAW3270_IO_BUSY; 704 } 705 } 706 if (rq) { 707 if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) { 708 if (irb->ecw[0] & SNS0_CMD_REJECT) 709 rq->rc = -EOPNOTSUPP; 710 else 711 rq->rc = -EIO; 712 } 713 } 714 if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) { 715 /* Queue read modified after attention interrupt */ 716 rp = view->dev; 717 raw3270_read_modified(rp); 718 } 719 return RAW3270_IO_DONE; 720 } 721 722 static struct raw3270_fn raw3270_init_fn = { 723 .intv = raw3270_init_irq 724 }; 725 726 /* 727 * Setup new 3270 device. 728 */ 729 static int 730 raw3270_setup_device(struct ccw_device *cdev, struct raw3270 *rp, char *ascebc) 731 { 732 struct list_head *l; 733 struct raw3270 *tmp; 734 int minor; 735 736 memset(rp, 0, sizeof(struct raw3270)); 737 /* Copy ebcdic -> ascii translation table. */ 738 memcpy(ascebc, _ascebc, 256); 739 if (tubxcorrect) { 740 /* correct brackets and circumflex */ 741 ascebc['['] = 0xad; 742 ascebc[']'] = 0xbd; 743 ascebc['^'] = 0xb0; 744 } 745 rp->ascebc = ascebc; 746 747 /* Set defaults. */ 748 rp->rows = 24; 749 rp->cols = 80; 750 751 INIT_LIST_HEAD(&rp->req_queue); 752 INIT_LIST_HEAD(&rp->view_list); 753 754 rp->init_view.dev = rp; 755 rp->init_view.fn = &raw3270_init_fn; 756 rp->view = &rp->init_view; 757 758 /* 759 * Add device to list and find the smallest unused minor 760 * number for it. Note: there is no device with minor 0, 761 * see special case for fs3270.c:fs3270_open(). 762 */ 763 mutex_lock(&raw3270_mutex); 764 /* Keep the list sorted. */ 765 minor = RAW3270_FIRSTMINOR; 766 rp->minor = -1; 767 list_for_each(l, &raw3270_devices) { 768 tmp = list_entry(l, struct raw3270, list); 769 if (tmp->minor > minor) { 770 rp->minor = minor; 771 __list_add(&rp->list, l->prev, l); 772 break; 773 } 774 minor++; 775 } 776 if (rp->minor == -1 && minor < RAW3270_MAXDEVS + RAW3270_FIRSTMINOR) { 777 rp->minor = minor; 778 list_add_tail(&rp->list, &raw3270_devices); 779 } 780 mutex_unlock(&raw3270_mutex); 781 /* No free minor number? Then give up. */ 782 if (rp->minor == -1) 783 return -EUSERS; 784 rp->cdev = cdev; 785 dev_set_drvdata(&cdev->dev, rp); 786 cdev->handler = raw3270_irq; 787 return 0; 788 } 789 790 #ifdef CONFIG_TN3270_CONSOLE 791 /* Tentative definition - see below for actual definition. */ 792 static struct ccw_driver raw3270_ccw_driver; 793 794 /* 795 * Setup 3270 device configured as console. 796 */ 797 struct raw3270 __init *raw3270_setup_console(void) 798 { 799 struct ccw_device *cdev; 800 unsigned long flags; 801 struct raw3270 *rp; 802 char *ascebc; 803 int rc; 804 805 cdev = ccw_device_create_console(&raw3270_ccw_driver); 806 if (IS_ERR(cdev)) 807 return ERR_CAST(cdev); 808 809 rp = kzalloc(sizeof(struct raw3270), GFP_KERNEL | GFP_DMA); 810 ascebc = kzalloc(256, GFP_KERNEL); 811 rc = raw3270_setup_device(cdev, rp, ascebc); 812 if (rc) 813 return ERR_PTR(rc); 814 set_bit(RAW3270_FLAGS_CONSOLE, &rp->flags); 815 816 rc = ccw_device_enable_console(cdev); 817 if (rc) { 818 ccw_device_destroy_console(cdev); 819 return ERR_PTR(rc); 820 } 821 822 spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); 823 do { 824 __raw3270_reset_device(rp); 825 while (!raw3270_state_final(rp)) { 826 ccw_device_wait_idle(rp->cdev); 827 barrier(); 828 } 829 } while (rp->state != RAW3270_STATE_READY); 830 spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); 831 return rp; 832 } 833 834 void 835 raw3270_wait_cons_dev(struct raw3270 *rp) 836 { 837 unsigned long flags; 838 839 spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); 840 ccw_device_wait_idle(rp->cdev); 841 spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); 842 } 843 844 #endif 845 846 /* 847 * Create a 3270 device structure. 848 */ 849 static struct raw3270 * 850 raw3270_create_device(struct ccw_device *cdev) 851 { 852 struct raw3270 *rp; 853 char *ascebc; 854 int rc; 855 856 rp = kzalloc(sizeof(struct raw3270), GFP_KERNEL | GFP_DMA); 857 if (!rp) 858 return ERR_PTR(-ENOMEM); 859 ascebc = kmalloc(256, GFP_KERNEL); 860 if (!ascebc) { 861 kfree(rp); 862 return ERR_PTR(-ENOMEM); 863 } 864 rc = raw3270_setup_device(cdev, rp, ascebc); 865 if (rc) { 866 kfree(rp->ascebc); 867 kfree(rp); 868 rp = ERR_PTR(rc); 869 } 870 /* Get reference to ccw_device structure. */ 871 get_device(&cdev->dev); 872 return rp; 873 } 874 875 /* 876 * Activate a view. 877 */ 878 int 879 raw3270_activate_view(struct raw3270_view *view) 880 { 881 struct raw3270 *rp; 882 struct raw3270_view *oldview, *nv; 883 unsigned long flags; 884 int rc; 885 886 rp = view->dev; 887 if (!rp) 888 return -ENODEV; 889 spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); 890 if (rp->view == view) 891 rc = 0; 892 else if (!raw3270_state_ready(rp)) 893 rc = -EBUSY; 894 else if (test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) 895 rc = -EACCES; 896 else { 897 oldview = NULL; 898 if (rp->view && rp->view->fn->deactivate) { 899 oldview = rp->view; 900 oldview->fn->deactivate(oldview); 901 } 902 rp->view = view; 903 rc = view->fn->activate(view); 904 if (rc) { 905 /* Didn't work. Try to reactivate the old view. */ 906 rp->view = oldview; 907 if (!oldview || oldview->fn->activate(oldview) != 0) { 908 /* Didn't work as well. Try any other view. */ 909 list_for_each_entry(nv, &rp->view_list, list) 910 if (nv != view && nv != oldview) { 911 rp->view = nv; 912 if (nv->fn->activate(nv) == 0) 913 break; 914 rp->view = NULL; 915 } 916 } 917 } 918 } 919 spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); 920 return rc; 921 } 922 923 /* 924 * Deactivate current view. 925 */ 926 void 927 raw3270_deactivate_view(struct raw3270_view *view) 928 { 929 unsigned long flags; 930 struct raw3270 *rp; 931 932 rp = view->dev; 933 if (!rp) 934 return; 935 spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); 936 if (rp->view == view) { 937 view->fn->deactivate(view); 938 rp->view = NULL; 939 /* Move deactivated view to end of list. */ 940 list_del_init(&view->list); 941 list_add_tail(&view->list, &rp->view_list); 942 /* Try to activate another view. */ 943 if (raw3270_state_ready(rp) && 944 !test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) { 945 list_for_each_entry(view, &rp->view_list, list) { 946 rp->view = view; 947 if (view->fn->activate(view) == 0) 948 break; 949 rp->view = NULL; 950 } 951 } 952 } 953 spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); 954 } 955 956 /* 957 * Add view to device with minor "minor". 958 */ 959 int 960 raw3270_add_view(struct raw3270_view *view, struct raw3270_fn *fn, int minor) 961 { 962 unsigned long flags; 963 struct raw3270 *rp; 964 int rc; 965 966 if (minor <= 0) 967 return -ENODEV; 968 mutex_lock(&raw3270_mutex); 969 rc = -ENODEV; 970 list_for_each_entry(rp, &raw3270_devices, list) { 971 if (rp->minor != minor) 972 continue; 973 spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); 974 atomic_set(&view->ref_count, 2); 975 view->dev = rp; 976 view->fn = fn; 977 view->model = rp->model; 978 view->rows = rp->rows; 979 view->cols = rp->cols; 980 view->ascebc = rp->ascebc; 981 spin_lock_init(&view->lock); 982 list_add(&view->list, &rp->view_list); 983 rc = 0; 984 spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); 985 break; 986 } 987 mutex_unlock(&raw3270_mutex); 988 return rc; 989 } 990 991 /* 992 * Find specific view of device with minor "minor". 993 */ 994 struct raw3270_view * 995 raw3270_find_view(struct raw3270_fn *fn, int minor) 996 { 997 struct raw3270 *rp; 998 struct raw3270_view *view, *tmp; 999 unsigned long flags; 1000 1001 mutex_lock(&raw3270_mutex); 1002 view = ERR_PTR(-ENODEV); 1003 list_for_each_entry(rp, &raw3270_devices, list) { 1004 if (rp->minor != minor) 1005 continue; 1006 spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); 1007 list_for_each_entry(tmp, &rp->view_list, list) { 1008 if (tmp->fn == fn) { 1009 raw3270_get_view(tmp); 1010 view = tmp; 1011 break; 1012 } 1013 } 1014 spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); 1015 break; 1016 } 1017 mutex_unlock(&raw3270_mutex); 1018 return view; 1019 } 1020 1021 /* 1022 * Remove view from device and free view structure via call to view->fn->free. 1023 */ 1024 void 1025 raw3270_del_view(struct raw3270_view *view) 1026 { 1027 unsigned long flags; 1028 struct raw3270 *rp; 1029 struct raw3270_view *nv; 1030 1031 rp = view->dev; 1032 spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); 1033 if (rp->view == view) { 1034 view->fn->deactivate(view); 1035 rp->view = NULL; 1036 } 1037 list_del_init(&view->list); 1038 if (!rp->view && raw3270_state_ready(rp) && 1039 !test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) { 1040 /* Try to activate another view. */ 1041 list_for_each_entry(nv, &rp->view_list, list) { 1042 if (nv->fn->activate(nv) == 0) { 1043 rp->view = nv; 1044 break; 1045 } 1046 } 1047 } 1048 spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); 1049 /* Wait for reference counter to drop to zero. */ 1050 atomic_dec(&view->ref_count); 1051 wait_event(raw3270_wait_queue, atomic_read(&view->ref_count) == 0); 1052 if (view->fn->free) 1053 view->fn->free(view); 1054 } 1055 1056 /* 1057 * Remove a 3270 device structure. 1058 */ 1059 static void 1060 raw3270_delete_device(struct raw3270 *rp) 1061 { 1062 struct ccw_device *cdev; 1063 1064 /* Remove from device chain. */ 1065 mutex_lock(&raw3270_mutex); 1066 list_del_init(&rp->list); 1067 mutex_unlock(&raw3270_mutex); 1068 1069 /* Disconnect from ccw_device. */ 1070 cdev = rp->cdev; 1071 rp->cdev = NULL; 1072 dev_set_drvdata(&cdev->dev, NULL); 1073 cdev->handler = NULL; 1074 1075 /* Put ccw_device structure. */ 1076 put_device(&cdev->dev); 1077 1078 /* Now free raw3270 structure. */ 1079 kfree(rp->ascebc); 1080 kfree(rp); 1081 } 1082 1083 static int 1084 raw3270_probe (struct ccw_device *cdev) 1085 { 1086 return 0; 1087 } 1088 1089 /* 1090 * Additional attributes for a 3270 device 1091 */ 1092 static ssize_t 1093 raw3270_model_show(struct device *dev, struct device_attribute *attr, char *buf) 1094 { 1095 return snprintf(buf, PAGE_SIZE, "%i\n", 1096 ((struct raw3270 *) dev_get_drvdata(dev))->model); 1097 } 1098 static DEVICE_ATTR(model, 0444, raw3270_model_show, NULL); 1099 1100 static ssize_t 1101 raw3270_rows_show(struct device *dev, struct device_attribute *attr, char *buf) 1102 { 1103 return snprintf(buf, PAGE_SIZE, "%i\n", 1104 ((struct raw3270 *) dev_get_drvdata(dev))->rows); 1105 } 1106 static DEVICE_ATTR(rows, 0444, raw3270_rows_show, NULL); 1107 1108 static ssize_t 1109 raw3270_columns_show(struct device *dev, struct device_attribute *attr, char *buf) 1110 { 1111 return snprintf(buf, PAGE_SIZE, "%i\n", 1112 ((struct raw3270 *) dev_get_drvdata(dev))->cols); 1113 } 1114 static DEVICE_ATTR(columns, 0444, raw3270_columns_show, NULL); 1115 1116 static struct attribute * raw3270_attrs[] = { 1117 &dev_attr_model.attr, 1118 &dev_attr_rows.attr, 1119 &dev_attr_columns.attr, 1120 NULL, 1121 }; 1122 1123 static struct attribute_group raw3270_attr_group = { 1124 .attrs = raw3270_attrs, 1125 }; 1126 1127 static int raw3270_create_attributes(struct raw3270 *rp) 1128 { 1129 return sysfs_create_group(&rp->cdev->dev.kobj, &raw3270_attr_group); 1130 } 1131 1132 /* 1133 * Notifier for device addition/removal 1134 */ 1135 static LIST_HEAD(raw3270_notifier); 1136 1137 int raw3270_register_notifier(struct raw3270_notifier *notifier) 1138 { 1139 struct raw3270 *rp; 1140 1141 mutex_lock(&raw3270_mutex); 1142 list_add_tail(¬ifier->list, &raw3270_notifier); 1143 list_for_each_entry(rp, &raw3270_devices, list) 1144 notifier->create(rp->minor); 1145 mutex_unlock(&raw3270_mutex); 1146 return 0; 1147 } 1148 1149 void raw3270_unregister_notifier(struct raw3270_notifier *notifier) 1150 { 1151 struct raw3270 *rp; 1152 1153 mutex_lock(&raw3270_mutex); 1154 list_for_each_entry(rp, &raw3270_devices, list) 1155 notifier->destroy(rp->minor); 1156 list_del(¬ifier->list); 1157 mutex_unlock(&raw3270_mutex); 1158 } 1159 1160 /* 1161 * Set 3270 device online. 1162 */ 1163 static int 1164 raw3270_set_online (struct ccw_device *cdev) 1165 { 1166 struct raw3270_notifier *np; 1167 struct raw3270 *rp; 1168 int rc; 1169 1170 rp = raw3270_create_device(cdev); 1171 if (IS_ERR(rp)) 1172 return PTR_ERR(rp); 1173 rc = raw3270_create_attributes(rp); 1174 if (rc) 1175 goto failure; 1176 raw3270_reset_device(rp); 1177 mutex_lock(&raw3270_mutex); 1178 list_for_each_entry(np, &raw3270_notifier, list) 1179 np->create(rp->minor); 1180 mutex_unlock(&raw3270_mutex); 1181 return 0; 1182 1183 failure: 1184 raw3270_delete_device(rp); 1185 return rc; 1186 } 1187 1188 /* 1189 * Remove 3270 device structure. 1190 */ 1191 static void 1192 raw3270_remove (struct ccw_device *cdev) 1193 { 1194 unsigned long flags; 1195 struct raw3270 *rp; 1196 struct raw3270_view *v; 1197 struct raw3270_notifier *np; 1198 1199 rp = dev_get_drvdata(&cdev->dev); 1200 /* 1201 * _remove is the opposite of _probe; it's probe that 1202 * should set up rp. raw3270_remove gets entered for 1203 * devices even if they haven't been varied online. 1204 * Thus, rp may validly be NULL here. 1205 */ 1206 if (rp == NULL) 1207 return; 1208 1209 sysfs_remove_group(&cdev->dev.kobj, &raw3270_attr_group); 1210 1211 /* Deactivate current view and remove all views. */ 1212 spin_lock_irqsave(get_ccwdev_lock(cdev), flags); 1213 if (rp->view) { 1214 if (rp->view->fn->deactivate) 1215 rp->view->fn->deactivate(rp->view); 1216 rp->view = NULL; 1217 } 1218 while (!list_empty(&rp->view_list)) { 1219 v = list_entry(rp->view_list.next, struct raw3270_view, list); 1220 if (v->fn->release) 1221 v->fn->release(v); 1222 spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); 1223 raw3270_del_view(v); 1224 spin_lock_irqsave(get_ccwdev_lock(cdev), flags); 1225 } 1226 spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); 1227 1228 mutex_lock(&raw3270_mutex); 1229 list_for_each_entry(np, &raw3270_notifier, list) 1230 np->destroy(rp->minor); 1231 mutex_unlock(&raw3270_mutex); 1232 1233 /* Reset 3270 device. */ 1234 raw3270_reset_device(rp); 1235 /* And finally remove it. */ 1236 raw3270_delete_device(rp); 1237 } 1238 1239 /* 1240 * Set 3270 device offline. 1241 */ 1242 static int 1243 raw3270_set_offline (struct ccw_device *cdev) 1244 { 1245 struct raw3270 *rp; 1246 1247 rp = dev_get_drvdata(&cdev->dev); 1248 if (test_bit(RAW3270_FLAGS_CONSOLE, &rp->flags)) 1249 return -EBUSY; 1250 raw3270_remove(cdev); 1251 return 0; 1252 } 1253 1254 static int raw3270_pm_stop(struct ccw_device *cdev) 1255 { 1256 struct raw3270 *rp; 1257 struct raw3270_view *view; 1258 unsigned long flags; 1259 1260 rp = dev_get_drvdata(&cdev->dev); 1261 if (!rp) 1262 return 0; 1263 spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); 1264 if (rp->view && rp->view->fn->deactivate) 1265 rp->view->fn->deactivate(rp->view); 1266 if (!test_bit(RAW3270_FLAGS_CONSOLE, &rp->flags)) { 1267 /* 1268 * Release tty and fullscreen for all non-console 1269 * devices. 1270 */ 1271 list_for_each_entry(view, &rp->view_list, list) { 1272 if (view->fn->release) 1273 view->fn->release(view); 1274 } 1275 } 1276 set_bit(RAW3270_FLAGS_FROZEN, &rp->flags); 1277 spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); 1278 return 0; 1279 } 1280 1281 static int raw3270_pm_start(struct ccw_device *cdev) 1282 { 1283 struct raw3270 *rp; 1284 unsigned long flags; 1285 1286 rp = dev_get_drvdata(&cdev->dev); 1287 if (!rp) 1288 return 0; 1289 spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); 1290 clear_bit(RAW3270_FLAGS_FROZEN, &rp->flags); 1291 if (rp->view && rp->view->fn->activate) 1292 rp->view->fn->activate(rp->view); 1293 spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); 1294 return 0; 1295 } 1296 1297 void raw3270_pm_unfreeze(struct raw3270_view *view) 1298 { 1299 #ifdef CONFIG_TN3270_CONSOLE 1300 struct raw3270 *rp; 1301 1302 rp = view->dev; 1303 if (rp && test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) 1304 ccw_device_force_console(rp->cdev); 1305 #endif 1306 } 1307 1308 static struct ccw_device_id raw3270_id[] = { 1309 { CCW_DEVICE(0x3270, 0) }, 1310 { CCW_DEVICE(0x3271, 0) }, 1311 { CCW_DEVICE(0x3272, 0) }, 1312 { CCW_DEVICE(0x3273, 0) }, 1313 { CCW_DEVICE(0x3274, 0) }, 1314 { CCW_DEVICE(0x3275, 0) }, 1315 { CCW_DEVICE(0x3276, 0) }, 1316 { CCW_DEVICE(0x3277, 0) }, 1317 { CCW_DEVICE(0x3278, 0) }, 1318 { CCW_DEVICE(0x3279, 0) }, 1319 { CCW_DEVICE(0x3174, 0) }, 1320 { /* end of list */ }, 1321 }; 1322 1323 static struct ccw_driver raw3270_ccw_driver = { 1324 .driver = { 1325 .name = "3270", 1326 .owner = THIS_MODULE, 1327 }, 1328 .ids = raw3270_id, 1329 .probe = &raw3270_probe, 1330 .remove = &raw3270_remove, 1331 .set_online = &raw3270_set_online, 1332 .set_offline = &raw3270_set_offline, 1333 .freeze = &raw3270_pm_stop, 1334 .thaw = &raw3270_pm_start, 1335 .restore = &raw3270_pm_start, 1336 .int_class = IRQIO_C70, 1337 }; 1338 1339 static int 1340 raw3270_init(void) 1341 { 1342 struct raw3270 *rp; 1343 int rc; 1344 1345 if (raw3270_registered) 1346 return 0; 1347 raw3270_registered = 1; 1348 rc = ccw_driver_register(&raw3270_ccw_driver); 1349 if (rc == 0) { 1350 /* Create attributes for early (= console) device. */ 1351 mutex_lock(&raw3270_mutex); 1352 class3270 = class_create(THIS_MODULE, "3270"); 1353 list_for_each_entry(rp, &raw3270_devices, list) { 1354 get_device(&rp->cdev->dev); 1355 raw3270_create_attributes(rp); 1356 } 1357 mutex_unlock(&raw3270_mutex); 1358 } 1359 return rc; 1360 } 1361 1362 static void 1363 raw3270_exit(void) 1364 { 1365 ccw_driver_unregister(&raw3270_ccw_driver); 1366 class_destroy(class3270); 1367 } 1368 1369 MODULE_LICENSE("GPL"); 1370 1371 module_init(raw3270_init); 1372 module_exit(raw3270_exit); 1373 1374 EXPORT_SYMBOL(class3270); 1375 EXPORT_SYMBOL(raw3270_request_alloc); 1376 EXPORT_SYMBOL(raw3270_request_free); 1377 EXPORT_SYMBOL(raw3270_request_reset); 1378 EXPORT_SYMBOL(raw3270_request_set_cmd); 1379 EXPORT_SYMBOL(raw3270_request_add_data); 1380 EXPORT_SYMBOL(raw3270_request_set_data); 1381 EXPORT_SYMBOL(raw3270_request_set_idal); 1382 EXPORT_SYMBOL(raw3270_buffer_address); 1383 EXPORT_SYMBOL(raw3270_add_view); 1384 EXPORT_SYMBOL(raw3270_del_view); 1385 EXPORT_SYMBOL(raw3270_find_view); 1386 EXPORT_SYMBOL(raw3270_activate_view); 1387 EXPORT_SYMBOL(raw3270_deactivate_view); 1388 EXPORT_SYMBOL(raw3270_start); 1389 EXPORT_SYMBOL(raw3270_start_locked); 1390 EXPORT_SYMBOL(raw3270_start_irq); 1391 EXPORT_SYMBOL(raw3270_reset); 1392 EXPORT_SYMBOL(raw3270_register_notifier); 1393 EXPORT_SYMBOL(raw3270_unregister_notifier); 1394 EXPORT_SYMBOL(raw3270_wait_queue); 1395