1 /* 2 * drivers/s390/char/raw3270.c 3 * IBM/3270 Driver - core functions. 4 * 5 * Author(s): 6 * Original 3270 Code for 2.4 written by Richard Hitt (UTS Global) 7 * Rewritten for 2.5 by Martin Schwidefsky <schwidefsky@de.ibm.com> 8 * -- Copyright (C) 2003 IBM Deutschland Entwicklung GmbH, IBM Corporation 9 */ 10 11 #include <linux/bootmem.h> 12 #include <linux/module.h> 13 #include <linux/err.h> 14 #include <linux/init.h> 15 #include <linux/interrupt.h> 16 #include <linux/list.h> 17 #include <linux/slab.h> 18 #include <linux/types.h> 19 #include <linux/wait.h> 20 21 #include <asm/ccwdev.h> 22 #include <asm/cio.h> 23 #include <asm/ebcdic.h> 24 #include <asm/diag.h> 25 26 #include "raw3270.h" 27 28 #include <linux/major.h> 29 #include <linux/kdev_t.h> 30 #include <linux/device.h> 31 #include <linux/mutex.h> 32 33 static struct class *class3270; 34 35 /* The main 3270 data structure. */ 36 struct raw3270 { 37 struct list_head list; 38 struct ccw_device *cdev; 39 int minor; 40 41 short model, rows, cols; 42 unsigned long flags; 43 44 struct list_head req_queue; /* Request queue. */ 45 struct list_head view_list; /* List of available views. */ 46 struct raw3270_view *view; /* Active view. */ 47 48 struct timer_list timer; /* Device timer. */ 49 50 unsigned char *ascebc; /* ascii -> ebcdic table */ 51 struct device *clttydev; /* 3270-class tty device ptr */ 52 struct device *cltubdev; /* 3270-class tub device ptr */ 53 54 struct raw3270_request init_request; 55 unsigned char init_data[256]; 56 }; 57 58 /* raw3270->flags */ 59 #define RAW3270_FLAGS_14BITADDR 0 /* 14-bit buffer addresses */ 60 #define RAW3270_FLAGS_BUSY 1 /* Device busy, leave it alone */ 61 #define RAW3270_FLAGS_ATTN 2 /* Device sent an ATTN interrupt */ 62 #define RAW3270_FLAGS_READY 4 /* Device is useable by views */ 63 #define RAW3270_FLAGS_CONSOLE 8 /* Device is the console. */ 64 65 /* Semaphore to protect global data of raw3270 (devices, views, etc). */ 66 static DEFINE_MUTEX(raw3270_mutex); 67 68 /* List of 3270 devices. */ 69 static LIST_HEAD(raw3270_devices); 70 71 /* 72 * Flag to indicate if the driver has been registered. Some operations 73 * like waiting for the end of i/o need to be done differently as long 74 * as the kernel is still starting up (console support). 75 */ 76 static int raw3270_registered; 77 78 /* Module parameters */ 79 static int tubxcorrect = 0; 80 module_param(tubxcorrect, bool, 0); 81 82 /* 83 * Wait queue for device init/delete, view delete. 84 */ 85 DECLARE_WAIT_QUEUE_HEAD(raw3270_wait_queue); 86 87 /* 88 * Encode array for 12 bit 3270 addresses. 89 */ 90 static unsigned char raw3270_ebcgraf[64] = { 91 0x40, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 92 0xc8, 0xc9, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, 93 0x50, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 94 0xd8, 0xd9, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, 95 0x60, 0x61, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 96 0xe8, 0xe9, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 97 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 98 0xf8, 0xf9, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f 99 }; 100 101 void 102 raw3270_buffer_address(struct raw3270 *rp, char *cp, unsigned short addr) 103 { 104 if (test_bit(RAW3270_FLAGS_14BITADDR, &rp->flags)) { 105 cp[0] = (addr >> 8) & 0x3f; 106 cp[1] = addr & 0xff; 107 } else { 108 cp[0] = raw3270_ebcgraf[(addr >> 6) & 0x3f]; 109 cp[1] = raw3270_ebcgraf[addr & 0x3f]; 110 } 111 } 112 113 /* 114 * Allocate a new 3270 ccw request 115 */ 116 struct raw3270_request * 117 raw3270_request_alloc(size_t size) 118 { 119 struct raw3270_request *rq; 120 121 /* Allocate request structure */ 122 rq = kzalloc(sizeof(struct raw3270_request), GFP_KERNEL | GFP_DMA); 123 if (!rq) 124 return ERR_PTR(-ENOMEM); 125 126 /* alloc output buffer. */ 127 if (size > 0) { 128 rq->buffer = kmalloc(size, GFP_KERNEL | GFP_DMA); 129 if (!rq->buffer) { 130 kfree(rq); 131 return ERR_PTR(-ENOMEM); 132 } 133 } 134 rq->size = size; 135 INIT_LIST_HEAD(&rq->list); 136 137 /* 138 * Setup ccw. 139 */ 140 rq->ccw.cda = __pa(rq->buffer); 141 rq->ccw.flags = CCW_FLAG_SLI; 142 143 return rq; 144 } 145 146 #ifdef CONFIG_TN3270_CONSOLE 147 /* 148 * Allocate a new 3270 ccw request from bootmem. Only works very 149 * early in the boot process. Only con3270.c should be using this. 150 */ 151 struct raw3270_request __init *raw3270_request_alloc_bootmem(size_t size) 152 { 153 struct raw3270_request *rq; 154 155 rq = alloc_bootmem_low(sizeof(struct raw3270)); 156 if (!rq) 157 return ERR_PTR(-ENOMEM); 158 memset(rq, 0, sizeof(struct raw3270_request)); 159 160 /* alloc output buffer. */ 161 if (size > 0) { 162 rq->buffer = alloc_bootmem_low(size); 163 if (!rq->buffer) { 164 free_bootmem((unsigned long) rq, 165 sizeof(struct raw3270)); 166 return ERR_PTR(-ENOMEM); 167 } 168 } 169 rq->size = size; 170 INIT_LIST_HEAD(&rq->list); 171 172 /* 173 * Setup ccw. 174 */ 175 rq->ccw.cda = __pa(rq->buffer); 176 rq->ccw.flags = CCW_FLAG_SLI; 177 178 return rq; 179 } 180 #endif 181 182 /* 183 * Free 3270 ccw request 184 */ 185 void 186 raw3270_request_free (struct raw3270_request *rq) 187 { 188 kfree(rq->buffer); 189 kfree(rq); 190 } 191 192 /* 193 * Reset request to initial state. 194 */ 195 void 196 raw3270_request_reset(struct raw3270_request *rq) 197 { 198 BUG_ON(!list_empty(&rq->list)); 199 rq->ccw.cmd_code = 0; 200 rq->ccw.count = 0; 201 rq->ccw.cda = __pa(rq->buffer); 202 rq->ccw.flags = CCW_FLAG_SLI; 203 rq->rescnt = 0; 204 rq->rc = 0; 205 } 206 207 /* 208 * Set command code to ccw of a request. 209 */ 210 void 211 raw3270_request_set_cmd(struct raw3270_request *rq, u8 cmd) 212 { 213 rq->ccw.cmd_code = cmd; 214 } 215 216 /* 217 * Add data fragment to output buffer. 218 */ 219 int 220 raw3270_request_add_data(struct raw3270_request *rq, void *data, size_t size) 221 { 222 if (size + rq->ccw.count > rq->size) 223 return -E2BIG; 224 memcpy(rq->buffer + rq->ccw.count, data, size); 225 rq->ccw.count += size; 226 return 0; 227 } 228 229 /* 230 * Set address/length pair to ccw of a request. 231 */ 232 void 233 raw3270_request_set_data(struct raw3270_request *rq, void *data, size_t size) 234 { 235 rq->ccw.cda = __pa(data); 236 rq->ccw.count = size; 237 } 238 239 /* 240 * Set idal buffer to ccw of a request. 241 */ 242 void 243 raw3270_request_set_idal(struct raw3270_request *rq, struct idal_buffer *ib) 244 { 245 rq->ccw.cda = __pa(ib->data); 246 rq->ccw.count = ib->size; 247 rq->ccw.flags |= CCW_FLAG_IDA; 248 } 249 250 /* 251 * Stop running ccw. 252 */ 253 static int 254 raw3270_halt_io_nolock(struct raw3270 *rp, struct raw3270_request *rq) 255 { 256 int retries; 257 int rc; 258 259 if (raw3270_request_final(rq)) 260 return 0; 261 /* Check if interrupt has already been processed */ 262 for (retries = 0; retries < 5; retries++) { 263 if (retries < 2) 264 rc = ccw_device_halt(rp->cdev, (long) rq); 265 else 266 rc = ccw_device_clear(rp->cdev, (long) rq); 267 if (rc == 0) 268 break; /* termination successful */ 269 } 270 return rc; 271 } 272 273 static int 274 raw3270_halt_io(struct raw3270 *rp, struct raw3270_request *rq) 275 { 276 unsigned long flags; 277 int rc; 278 279 spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); 280 rc = raw3270_halt_io_nolock(rp, rq); 281 spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); 282 return rc; 283 } 284 285 /* 286 * Add the request to the request queue, try to start it if the 287 * 3270 device is idle. Return without waiting for end of i/o. 288 */ 289 static int 290 __raw3270_start(struct raw3270 *rp, struct raw3270_view *view, 291 struct raw3270_request *rq) 292 { 293 rq->view = view; 294 raw3270_get_view(view); 295 if (list_empty(&rp->req_queue) && 296 !test_bit(RAW3270_FLAGS_BUSY, &rp->flags)) { 297 /* No other requests are on the queue. Start this one. */ 298 rq->rc = ccw_device_start(rp->cdev, &rq->ccw, 299 (unsigned long) rq, 0, 0); 300 if (rq->rc) { 301 raw3270_put_view(view); 302 return rq->rc; 303 } 304 } 305 list_add_tail(&rq->list, &rp->req_queue); 306 return 0; 307 } 308 309 int 310 raw3270_start(struct raw3270_view *view, struct raw3270_request *rq) 311 { 312 unsigned long flags; 313 struct raw3270 *rp; 314 int rc; 315 316 spin_lock_irqsave(get_ccwdev_lock(view->dev->cdev), flags); 317 rp = view->dev; 318 if (!rp || rp->view != view) 319 rc = -EACCES; 320 else if (!test_bit(RAW3270_FLAGS_READY, &rp->flags)) 321 rc = -ENODEV; 322 else 323 rc = __raw3270_start(rp, view, rq); 324 spin_unlock_irqrestore(get_ccwdev_lock(view->dev->cdev), flags); 325 return rc; 326 } 327 328 int 329 raw3270_start_locked(struct raw3270_view *view, struct raw3270_request *rq) 330 { 331 struct raw3270 *rp; 332 int rc; 333 334 rp = view->dev; 335 if (!rp || rp->view != view) 336 rc = -EACCES; 337 else if (!test_bit(RAW3270_FLAGS_READY, &rp->flags)) 338 rc = -ENODEV; 339 else 340 rc = __raw3270_start(rp, view, rq); 341 return rc; 342 } 343 344 int 345 raw3270_start_irq(struct raw3270_view *view, struct raw3270_request *rq) 346 { 347 struct raw3270 *rp; 348 349 rp = view->dev; 350 rq->view = view; 351 raw3270_get_view(view); 352 list_add_tail(&rq->list, &rp->req_queue); 353 return 0; 354 } 355 356 /* 357 * 3270 interrupt routine, called from the ccw_device layer 358 */ 359 static void 360 raw3270_irq (struct ccw_device *cdev, unsigned long intparm, struct irb *irb) 361 { 362 struct raw3270 *rp; 363 struct raw3270_view *view; 364 struct raw3270_request *rq; 365 int rc; 366 367 rp = (struct raw3270 *) cdev->dev.driver_data; 368 if (!rp) 369 return; 370 rq = (struct raw3270_request *) intparm; 371 view = rq ? rq->view : rp->view; 372 373 if (IS_ERR(irb)) 374 rc = RAW3270_IO_RETRY; 375 else if (irb->scsw.fctl & SCSW_FCTL_HALT_FUNC) { 376 rq->rc = -EIO; 377 rc = RAW3270_IO_DONE; 378 } else if (irb->scsw.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END | 379 DEV_STAT_UNIT_EXCEP)) { 380 /* Handle CE-DE-UE and subsequent UDE */ 381 set_bit(RAW3270_FLAGS_BUSY, &rp->flags); 382 rc = RAW3270_IO_BUSY; 383 } else if (test_bit(RAW3270_FLAGS_BUSY, &rp->flags)) { 384 /* Wait for UDE if busy flag is set. */ 385 if (irb->scsw.dstat & DEV_STAT_DEV_END) { 386 clear_bit(RAW3270_FLAGS_BUSY, &rp->flags); 387 /* Got it, now retry. */ 388 rc = RAW3270_IO_RETRY; 389 } else 390 rc = RAW3270_IO_BUSY; 391 } else if (view) 392 rc = view->fn->intv(view, rq, irb); 393 else 394 rc = RAW3270_IO_DONE; 395 396 switch (rc) { 397 case RAW3270_IO_DONE: 398 break; 399 case RAW3270_IO_BUSY: 400 /* 401 * Intervention required by the operator. We have to wait 402 * for unsolicited device end. 403 */ 404 return; 405 case RAW3270_IO_RETRY: 406 if (!rq) 407 break; 408 rq->rc = ccw_device_start(rp->cdev, &rq->ccw, 409 (unsigned long) rq, 0, 0); 410 if (rq->rc == 0) 411 return; /* Sucessfully restarted. */ 412 break; 413 case RAW3270_IO_STOP: 414 if (!rq) 415 break; 416 raw3270_halt_io_nolock(rp, rq); 417 rq->rc = -EIO; 418 break; 419 default: 420 BUG(); 421 } 422 if (rq) { 423 BUG_ON(list_empty(&rq->list)); 424 /* The request completed, remove from queue and do callback. */ 425 list_del_init(&rq->list); 426 if (rq->callback) 427 rq->callback(rq, rq->callback_data); 428 /* Do put_device for get_device in raw3270_start. */ 429 raw3270_put_view(view); 430 } 431 /* 432 * Try to start each request on request queue until one is 433 * started successful. 434 */ 435 while (!list_empty(&rp->req_queue)) { 436 rq = list_entry(rp->req_queue.next,struct raw3270_request,list); 437 rq->rc = ccw_device_start(rp->cdev, &rq->ccw, 438 (unsigned long) rq, 0, 0); 439 if (rq->rc == 0) 440 break; 441 /* Start failed. Remove request and do callback. */ 442 list_del_init(&rq->list); 443 if (rq->callback) 444 rq->callback(rq, rq->callback_data); 445 /* Do put_device for get_device in raw3270_start. */ 446 raw3270_put_view(view); 447 } 448 } 449 450 /* 451 * Size sensing. 452 */ 453 454 struct raw3270_ua { /* Query Reply structure for Usable Area */ 455 struct { /* Usable Area Query Reply Base */ 456 short l; /* Length of this structured field */ 457 char sfid; /* 0x81 if Query Reply */ 458 char qcode; /* 0x81 if Usable Area */ 459 char flags0; 460 char flags1; 461 short w; /* Width of usable area */ 462 short h; /* Heigth of usavle area */ 463 char units; /* 0x00:in; 0x01:mm */ 464 int xr; 465 int yr; 466 char aw; 467 char ah; 468 short buffsz; /* Character buffer size, bytes */ 469 char xmin; 470 char ymin; 471 char xmax; 472 char ymax; 473 } __attribute__ ((packed)) uab; 474 struct { /* Alternate Usable Area Self-Defining Parameter */ 475 char l; /* Length of this Self-Defining Parm */ 476 char sdpid; /* 0x02 if Alternate Usable Area */ 477 char res; 478 char auaid; /* 0x01 is Id for the A U A */ 479 short wauai; /* Width of AUAi */ 480 short hauai; /* Height of AUAi */ 481 char auaunits; /* 0x00:in, 0x01:mm */ 482 int auaxr; 483 int auayr; 484 char awauai; 485 char ahauai; 486 } __attribute__ ((packed)) aua; 487 } __attribute__ ((packed)); 488 489 static struct diag210 raw3270_init_diag210; 490 static DEFINE_MUTEX(raw3270_init_mutex); 491 492 static int 493 raw3270_init_irq(struct raw3270_view *view, struct raw3270_request *rq, 494 struct irb *irb) 495 { 496 /* 497 * Unit-Check Processing: 498 * Expect Command Reject or Intervention Required. 499 */ 500 if (irb->scsw.dstat & DEV_STAT_UNIT_CHECK) { 501 /* Request finished abnormally. */ 502 if (irb->ecw[0] & SNS0_INTERVENTION_REQ) { 503 set_bit(RAW3270_FLAGS_BUSY, &view->dev->flags); 504 return RAW3270_IO_BUSY; 505 } 506 } 507 if (rq) { 508 if (irb->scsw.dstat & DEV_STAT_UNIT_CHECK) { 509 if (irb->ecw[0] & SNS0_CMD_REJECT) 510 rq->rc = -EOPNOTSUPP; 511 else 512 rq->rc = -EIO; 513 } else 514 /* Request finished normally. Copy residual count. */ 515 rq->rescnt = irb->scsw.count; 516 } 517 if (irb->scsw.dstat & DEV_STAT_ATTENTION) { 518 set_bit(RAW3270_FLAGS_ATTN, &view->dev->flags); 519 wake_up(&raw3270_wait_queue); 520 } 521 return RAW3270_IO_DONE; 522 } 523 524 static struct raw3270_fn raw3270_init_fn = { 525 .intv = raw3270_init_irq 526 }; 527 528 static struct raw3270_view raw3270_init_view = { 529 .fn = &raw3270_init_fn 530 }; 531 532 /* 533 * raw3270_wait/raw3270_wait_interruptible/__raw3270_wakeup 534 * Wait for end of request. The request must have been started 535 * with raw3270_start, rc = 0. The device lock may NOT have been 536 * released between calling raw3270_start and raw3270_wait. 537 */ 538 static void 539 raw3270_wake_init(struct raw3270_request *rq, void *data) 540 { 541 wake_up((wait_queue_head_t *) data); 542 } 543 544 /* 545 * Special wait function that can cope with console initialization. 546 */ 547 static int 548 raw3270_start_init(struct raw3270 *rp, struct raw3270_view *view, 549 struct raw3270_request *rq) 550 { 551 unsigned long flags; 552 wait_queue_head_t wq; 553 int rc; 554 555 #ifdef CONFIG_TN3270_CONSOLE 556 if (raw3270_registered == 0) { 557 spin_lock_irqsave(get_ccwdev_lock(view->dev->cdev), flags); 558 rq->callback = NULL; 559 rc = __raw3270_start(rp, view, rq); 560 if (rc == 0) 561 while (!raw3270_request_final(rq)) { 562 wait_cons_dev(); 563 barrier(); 564 } 565 spin_unlock_irqrestore(get_ccwdev_lock(view->dev->cdev), flags); 566 return rq->rc; 567 } 568 #endif 569 init_waitqueue_head(&wq); 570 rq->callback = raw3270_wake_init; 571 rq->callback_data = &wq; 572 spin_lock_irqsave(get_ccwdev_lock(view->dev->cdev), flags); 573 rc = __raw3270_start(rp, view, rq); 574 spin_unlock_irqrestore(get_ccwdev_lock(view->dev->cdev), flags); 575 if (rc) 576 return rc; 577 /* Now wait for the completion. */ 578 rc = wait_event_interruptible(wq, raw3270_request_final(rq)); 579 if (rc == -ERESTARTSYS) { /* Interrupted by a signal. */ 580 raw3270_halt_io(view->dev, rq); 581 /* No wait for the halt to complete. */ 582 wait_event(wq, raw3270_request_final(rq)); 583 return -ERESTARTSYS; 584 } 585 return rq->rc; 586 } 587 588 static int 589 __raw3270_size_device_vm(struct raw3270 *rp) 590 { 591 int rc, model; 592 struct ccw_dev_id dev_id; 593 594 ccw_device_get_id(rp->cdev, &dev_id); 595 raw3270_init_diag210.vrdcdvno = dev_id.devno; 596 raw3270_init_diag210.vrdclen = sizeof(struct diag210); 597 rc = diag210(&raw3270_init_diag210); 598 if (rc) 599 return rc; 600 model = raw3270_init_diag210.vrdccrmd; 601 switch (model) { 602 case 2: 603 rp->model = model; 604 rp->rows = 24; 605 rp->cols = 80; 606 break; 607 case 3: 608 rp->model = model; 609 rp->rows = 32; 610 rp->cols = 80; 611 break; 612 case 4: 613 rp->model = model; 614 rp->rows = 43; 615 rp->cols = 80; 616 break; 617 case 5: 618 rp->model = model; 619 rp->rows = 27; 620 rp->cols = 132; 621 break; 622 default: 623 printk(KERN_WARNING "vrdccrmd is 0x%.8x\n", model); 624 rc = -EOPNOTSUPP; 625 break; 626 } 627 return rc; 628 } 629 630 static int 631 __raw3270_size_device(struct raw3270 *rp) 632 { 633 static const unsigned char wbuf[] = 634 { 0x00, 0x07, 0x01, 0xff, 0x03, 0x00, 0x81 }; 635 struct raw3270_ua *uap; 636 unsigned short count; 637 int rc; 638 639 /* 640 * To determine the size of the 3270 device we need to do: 641 * 1) send a 'read partition' data stream to the device 642 * 2) wait for the attn interrupt that preceeds the query reply 643 * 3) do a read modified to get the query reply 644 * To make things worse we have to cope with intervention 645 * required (3270 device switched to 'stand-by') and command 646 * rejects (old devices that can't do 'read partition'). 647 */ 648 memset(&rp->init_request, 0, sizeof(rp->init_request)); 649 memset(&rp->init_data, 0, 256); 650 /* Store 'read partition' data stream to init_data */ 651 memcpy(&rp->init_data, wbuf, sizeof(wbuf)); 652 INIT_LIST_HEAD(&rp->init_request.list); 653 rp->init_request.ccw.cmd_code = TC_WRITESF; 654 rp->init_request.ccw.flags = CCW_FLAG_SLI; 655 rp->init_request.ccw.count = sizeof(wbuf); 656 rp->init_request.ccw.cda = (__u32) __pa(&rp->init_data); 657 658 rc = raw3270_start_init(rp, &raw3270_init_view, &rp->init_request); 659 if (rc) 660 /* Check error cases: -ERESTARTSYS, -EIO and -EOPNOTSUPP */ 661 return rc; 662 663 /* Wait for attention interrupt. */ 664 #ifdef CONFIG_TN3270_CONSOLE 665 if (raw3270_registered == 0) { 666 unsigned long flags; 667 668 spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); 669 while (!test_and_clear_bit(RAW3270_FLAGS_ATTN, &rp->flags)) 670 wait_cons_dev(); 671 spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); 672 } else 673 #endif 674 rc = wait_event_interruptible(raw3270_wait_queue, 675 test_and_clear_bit(RAW3270_FLAGS_ATTN, &rp->flags)); 676 if (rc) 677 return rc; 678 679 /* 680 * The device accepted the 'read partition' command. Now 681 * set up a read ccw and issue it. 682 */ 683 rp->init_request.ccw.cmd_code = TC_READMOD; 684 rp->init_request.ccw.flags = CCW_FLAG_SLI; 685 rp->init_request.ccw.count = sizeof(rp->init_data); 686 rp->init_request.ccw.cda = (__u32) __pa(rp->init_data); 687 rc = raw3270_start_init(rp, &raw3270_init_view, &rp->init_request); 688 if (rc) 689 return rc; 690 /* Got a Query Reply */ 691 count = sizeof(rp->init_data) - rp->init_request.rescnt; 692 uap = (struct raw3270_ua *) (rp->init_data + 1); 693 /* Paranoia check. */ 694 if (rp->init_data[0] != 0x88 || uap->uab.qcode != 0x81) 695 return -EOPNOTSUPP; 696 /* Copy rows/columns of default Usable Area */ 697 rp->rows = uap->uab.h; 698 rp->cols = uap->uab.w; 699 /* Check for 14 bit addressing */ 700 if ((uap->uab.flags0 & 0x0d) == 0x01) 701 set_bit(RAW3270_FLAGS_14BITADDR, &rp->flags); 702 /* Check for Alternate Usable Area */ 703 if (uap->uab.l == sizeof(struct raw3270_ua) && 704 uap->aua.sdpid == 0x02) { 705 rp->rows = uap->aua.hauai; 706 rp->cols = uap->aua.wauai; 707 } 708 return 0; 709 } 710 711 static int 712 raw3270_size_device(struct raw3270 *rp) 713 { 714 int rc; 715 716 mutex_lock(&raw3270_init_mutex); 717 rp->view = &raw3270_init_view; 718 raw3270_init_view.dev = rp; 719 if (MACHINE_IS_VM) 720 rc = __raw3270_size_device_vm(rp); 721 else 722 rc = __raw3270_size_device(rp); 723 raw3270_init_view.dev = NULL; 724 rp->view = NULL; 725 mutex_unlock(&raw3270_init_mutex); 726 if (rc == 0) { /* Found something. */ 727 /* Try to find a model. */ 728 rp->model = 0; 729 if (rp->rows == 24 && rp->cols == 80) 730 rp->model = 2; 731 if (rp->rows == 32 && rp->cols == 80) 732 rp->model = 3; 733 if (rp->rows == 43 && rp->cols == 80) 734 rp->model = 4; 735 if (rp->rows == 27 && rp->cols == 132) 736 rp->model = 5; 737 } else { 738 /* Couldn't detect size. Use default model 2. */ 739 rp->model = 2; 740 rp->rows = 24; 741 rp->cols = 80; 742 return 0; 743 } 744 return rc; 745 } 746 747 static int 748 raw3270_reset_device(struct raw3270 *rp) 749 { 750 int rc; 751 752 mutex_lock(&raw3270_init_mutex); 753 memset(&rp->init_request, 0, sizeof(rp->init_request)); 754 memset(&rp->init_data, 0, sizeof(rp->init_data)); 755 /* Store reset data stream to init_data/init_request */ 756 rp->init_data[0] = TW_KR; 757 INIT_LIST_HEAD(&rp->init_request.list); 758 rp->init_request.ccw.cmd_code = TC_EWRITEA; 759 rp->init_request.ccw.flags = CCW_FLAG_SLI; 760 rp->init_request.ccw.count = 1; 761 rp->init_request.ccw.cda = (__u32) __pa(rp->init_data); 762 rp->view = &raw3270_init_view; 763 raw3270_init_view.dev = rp; 764 rc = raw3270_start_init(rp, &raw3270_init_view, &rp->init_request); 765 raw3270_init_view.dev = NULL; 766 rp->view = NULL; 767 mutex_unlock(&raw3270_init_mutex); 768 return rc; 769 } 770 771 int 772 raw3270_reset(struct raw3270_view *view) 773 { 774 struct raw3270 *rp; 775 int rc; 776 777 rp = view->dev; 778 if (!rp || rp->view != view) 779 rc = -EACCES; 780 else if (!test_bit(RAW3270_FLAGS_READY, &rp->flags)) 781 rc = -ENODEV; 782 else 783 rc = raw3270_reset_device(view->dev); 784 return rc; 785 } 786 787 /* 788 * Setup new 3270 device. 789 */ 790 static int 791 raw3270_setup_device(struct ccw_device *cdev, struct raw3270 *rp, char *ascebc) 792 { 793 struct list_head *l; 794 struct raw3270 *tmp; 795 int minor; 796 797 memset(rp, 0, sizeof(struct raw3270)); 798 /* Copy ebcdic -> ascii translation table. */ 799 memcpy(ascebc, _ascebc, 256); 800 if (tubxcorrect) { 801 /* correct brackets and circumflex */ 802 ascebc['['] = 0xad; 803 ascebc[']'] = 0xbd; 804 ascebc['^'] = 0xb0; 805 } 806 rp->ascebc = ascebc; 807 808 /* Set defaults. */ 809 rp->rows = 24; 810 rp->cols = 80; 811 812 INIT_LIST_HEAD(&rp->req_queue); 813 INIT_LIST_HEAD(&rp->view_list); 814 815 /* 816 * Add device to list and find the smallest unused minor 817 * number for it. Note: there is no device with minor 0, 818 * see special case for fs3270.c:fs3270_open(). 819 */ 820 mutex_lock(&raw3270_mutex); 821 /* Keep the list sorted. */ 822 minor = RAW3270_FIRSTMINOR; 823 rp->minor = -1; 824 list_for_each(l, &raw3270_devices) { 825 tmp = list_entry(l, struct raw3270, list); 826 if (tmp->minor > minor) { 827 rp->minor = minor; 828 __list_add(&rp->list, l->prev, l); 829 break; 830 } 831 minor++; 832 } 833 if (rp->minor == -1 && minor < RAW3270_MAXDEVS + RAW3270_FIRSTMINOR) { 834 rp->minor = minor; 835 list_add_tail(&rp->list, &raw3270_devices); 836 } 837 mutex_unlock(&raw3270_mutex); 838 /* No free minor number? Then give up. */ 839 if (rp->minor == -1) 840 return -EUSERS; 841 rp->cdev = cdev; 842 cdev->dev.driver_data = rp; 843 cdev->handler = raw3270_irq; 844 return 0; 845 } 846 847 #ifdef CONFIG_TN3270_CONSOLE 848 /* 849 * Setup 3270 device configured as console. 850 */ 851 struct raw3270 __init *raw3270_setup_console(struct ccw_device *cdev) 852 { 853 struct raw3270 *rp; 854 char *ascebc; 855 int rc; 856 857 rp = (struct raw3270 *) alloc_bootmem_low(sizeof(struct raw3270)); 858 ascebc = (char *) alloc_bootmem(256); 859 rc = raw3270_setup_device(cdev, rp, ascebc); 860 if (rc) 861 return ERR_PTR(rc); 862 set_bit(RAW3270_FLAGS_CONSOLE, &rp->flags); 863 rc = raw3270_reset_device(rp); 864 if (rc) 865 return ERR_PTR(rc); 866 rc = raw3270_size_device(rp); 867 if (rc) 868 return ERR_PTR(rc); 869 rc = raw3270_reset_device(rp); 870 if (rc) 871 return ERR_PTR(rc); 872 set_bit(RAW3270_FLAGS_READY, &rp->flags); 873 return rp; 874 } 875 876 void 877 raw3270_wait_cons_dev(struct raw3270 *rp) 878 { 879 unsigned long flags; 880 881 spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); 882 wait_cons_dev(); 883 spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); 884 } 885 886 #endif 887 888 /* 889 * Create a 3270 device structure. 890 */ 891 static struct raw3270 * 892 raw3270_create_device(struct ccw_device *cdev) 893 { 894 struct raw3270 *rp; 895 char *ascebc; 896 int rc; 897 898 rp = kmalloc(sizeof(struct raw3270), GFP_KERNEL | GFP_DMA); 899 if (!rp) 900 return ERR_PTR(-ENOMEM); 901 ascebc = kmalloc(256, GFP_KERNEL); 902 if (!ascebc) { 903 kfree(rp); 904 return ERR_PTR(-ENOMEM); 905 } 906 rc = raw3270_setup_device(cdev, rp, ascebc); 907 if (rc) { 908 kfree(rp->ascebc); 909 kfree(rp); 910 rp = ERR_PTR(rc); 911 } 912 /* Get reference to ccw_device structure. */ 913 get_device(&cdev->dev); 914 return rp; 915 } 916 917 /* 918 * Activate a view. 919 */ 920 int 921 raw3270_activate_view(struct raw3270_view *view) 922 { 923 struct raw3270 *rp; 924 struct raw3270_view *oldview, *nv; 925 unsigned long flags; 926 int rc; 927 928 rp = view->dev; 929 if (!rp) 930 return -ENODEV; 931 spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); 932 if (rp->view == view) 933 rc = 0; 934 else if (!test_bit(RAW3270_FLAGS_READY, &rp->flags)) 935 rc = -ENODEV; 936 else { 937 oldview = NULL; 938 if (rp->view) { 939 oldview = rp->view; 940 oldview->fn->deactivate(oldview); 941 } 942 rp->view = view; 943 rc = view->fn->activate(view); 944 if (rc) { 945 /* Didn't work. Try to reactivate the old view. */ 946 rp->view = oldview; 947 if (!oldview || oldview->fn->activate(oldview) != 0) { 948 /* Didn't work as well. Try any other view. */ 949 list_for_each_entry(nv, &rp->view_list, list) 950 if (nv != view && nv != oldview) { 951 rp->view = nv; 952 if (nv->fn->activate(nv) == 0) 953 break; 954 rp->view = NULL; 955 } 956 } 957 } 958 } 959 spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); 960 return rc; 961 } 962 963 /* 964 * Deactivate current view. 965 */ 966 void 967 raw3270_deactivate_view(struct raw3270_view *view) 968 { 969 unsigned long flags; 970 struct raw3270 *rp; 971 972 rp = view->dev; 973 if (!rp) 974 return; 975 spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); 976 if (rp->view == view) { 977 view->fn->deactivate(view); 978 rp->view = NULL; 979 /* Move deactivated view to end of list. */ 980 list_del_init(&view->list); 981 list_add_tail(&view->list, &rp->view_list); 982 /* Try to activate another view. */ 983 if (test_bit(RAW3270_FLAGS_READY, &rp->flags)) { 984 list_for_each_entry(view, &rp->view_list, list) { 985 rp->view = view; 986 if (view->fn->activate(view) == 0) 987 break; 988 rp->view = NULL; 989 } 990 } 991 } 992 spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); 993 } 994 995 /* 996 * Add view to device with minor "minor". 997 */ 998 int 999 raw3270_add_view(struct raw3270_view *view, struct raw3270_fn *fn, int minor) 1000 { 1001 unsigned long flags; 1002 struct raw3270 *rp; 1003 int rc; 1004 1005 if (minor <= 0) 1006 return -ENODEV; 1007 mutex_lock(&raw3270_mutex); 1008 rc = -ENODEV; 1009 list_for_each_entry(rp, &raw3270_devices, list) { 1010 if (rp->minor != minor) 1011 continue; 1012 spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); 1013 if (test_bit(RAW3270_FLAGS_READY, &rp->flags)) { 1014 atomic_set(&view->ref_count, 2); 1015 view->dev = rp; 1016 view->fn = fn; 1017 view->model = rp->model; 1018 view->rows = rp->rows; 1019 view->cols = rp->cols; 1020 view->ascebc = rp->ascebc; 1021 spin_lock_init(&view->lock); 1022 list_add(&view->list, &rp->view_list); 1023 rc = 0; 1024 } 1025 spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); 1026 break; 1027 } 1028 mutex_unlock(&raw3270_mutex); 1029 return rc; 1030 } 1031 1032 /* 1033 * Find specific view of device with minor "minor". 1034 */ 1035 struct raw3270_view * 1036 raw3270_find_view(struct raw3270_fn *fn, int minor) 1037 { 1038 struct raw3270 *rp; 1039 struct raw3270_view *view, *tmp; 1040 unsigned long flags; 1041 1042 mutex_lock(&raw3270_mutex); 1043 view = ERR_PTR(-ENODEV); 1044 list_for_each_entry(rp, &raw3270_devices, list) { 1045 if (rp->minor != minor) 1046 continue; 1047 spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); 1048 if (test_bit(RAW3270_FLAGS_READY, &rp->flags)) { 1049 view = ERR_PTR(-ENOENT); 1050 list_for_each_entry(tmp, &rp->view_list, list) { 1051 if (tmp->fn == fn) { 1052 raw3270_get_view(tmp); 1053 view = tmp; 1054 break; 1055 } 1056 } 1057 } 1058 spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); 1059 break; 1060 } 1061 mutex_unlock(&raw3270_mutex); 1062 return view; 1063 } 1064 1065 /* 1066 * Remove view from device and free view structure via call to view->fn->free. 1067 */ 1068 void 1069 raw3270_del_view(struct raw3270_view *view) 1070 { 1071 unsigned long flags; 1072 struct raw3270 *rp; 1073 struct raw3270_view *nv; 1074 1075 rp = view->dev; 1076 spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); 1077 if (rp->view == view) { 1078 view->fn->deactivate(view); 1079 rp->view = NULL; 1080 } 1081 list_del_init(&view->list); 1082 if (!rp->view && test_bit(RAW3270_FLAGS_READY, &rp->flags)) { 1083 /* Try to activate another view. */ 1084 list_for_each_entry(nv, &rp->view_list, list) { 1085 if (nv->fn->activate(nv) == 0) { 1086 rp->view = nv; 1087 break; 1088 } 1089 } 1090 } 1091 spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); 1092 /* Wait for reference counter to drop to zero. */ 1093 atomic_dec(&view->ref_count); 1094 wait_event(raw3270_wait_queue, atomic_read(&view->ref_count) == 0); 1095 if (view->fn->free) 1096 view->fn->free(view); 1097 } 1098 1099 /* 1100 * Remove a 3270 device structure. 1101 */ 1102 static void 1103 raw3270_delete_device(struct raw3270 *rp) 1104 { 1105 struct ccw_device *cdev; 1106 1107 /* Remove from device chain. */ 1108 mutex_lock(&raw3270_mutex); 1109 if (rp->clttydev && !IS_ERR(rp->clttydev)) 1110 device_destroy(class3270, MKDEV(IBM_TTY3270_MAJOR, rp->minor)); 1111 if (rp->cltubdev && !IS_ERR(rp->cltubdev)) 1112 device_destroy(class3270, MKDEV(IBM_FS3270_MAJOR, rp->minor)); 1113 list_del_init(&rp->list); 1114 mutex_unlock(&raw3270_mutex); 1115 1116 /* Disconnect from ccw_device. */ 1117 cdev = rp->cdev; 1118 rp->cdev = NULL; 1119 cdev->dev.driver_data = NULL; 1120 cdev->handler = NULL; 1121 1122 /* Put ccw_device structure. */ 1123 put_device(&cdev->dev); 1124 1125 /* Now free raw3270 structure. */ 1126 kfree(rp->ascebc); 1127 kfree(rp); 1128 } 1129 1130 static int 1131 raw3270_probe (struct ccw_device *cdev) 1132 { 1133 return 0; 1134 } 1135 1136 /* 1137 * Additional attributes for a 3270 device 1138 */ 1139 static ssize_t 1140 raw3270_model_show(struct device *dev, struct device_attribute *attr, char *buf) 1141 { 1142 return snprintf(buf, PAGE_SIZE, "%i\n", 1143 ((struct raw3270 *) dev->driver_data)->model); 1144 } 1145 static DEVICE_ATTR(model, 0444, raw3270_model_show, NULL); 1146 1147 static ssize_t 1148 raw3270_rows_show(struct device *dev, struct device_attribute *attr, char *buf) 1149 { 1150 return snprintf(buf, PAGE_SIZE, "%i\n", 1151 ((struct raw3270 *) dev->driver_data)->rows); 1152 } 1153 static DEVICE_ATTR(rows, 0444, raw3270_rows_show, NULL); 1154 1155 static ssize_t 1156 raw3270_columns_show(struct device *dev, struct device_attribute *attr, char *buf) 1157 { 1158 return snprintf(buf, PAGE_SIZE, "%i\n", 1159 ((struct raw3270 *) dev->driver_data)->cols); 1160 } 1161 static DEVICE_ATTR(columns, 0444, raw3270_columns_show, NULL); 1162 1163 static struct attribute * raw3270_attrs[] = { 1164 &dev_attr_model.attr, 1165 &dev_attr_rows.attr, 1166 &dev_attr_columns.attr, 1167 NULL, 1168 }; 1169 1170 static struct attribute_group raw3270_attr_group = { 1171 .attrs = raw3270_attrs, 1172 }; 1173 1174 static int raw3270_create_attributes(struct raw3270 *rp) 1175 { 1176 int rc; 1177 1178 rc = sysfs_create_group(&rp->cdev->dev.kobj, &raw3270_attr_group); 1179 if (rc) 1180 goto out; 1181 1182 rp->clttydev = device_create(class3270, &rp->cdev->dev, 1183 MKDEV(IBM_TTY3270_MAJOR, rp->minor), 1184 "tty%s", rp->cdev->dev.bus_id); 1185 if (IS_ERR(rp->clttydev)) { 1186 rc = PTR_ERR(rp->clttydev); 1187 goto out_ttydev; 1188 } 1189 1190 rp->cltubdev = device_create(class3270, &rp->cdev->dev, 1191 MKDEV(IBM_FS3270_MAJOR, rp->minor), 1192 "tub%s", rp->cdev->dev.bus_id); 1193 if (!IS_ERR(rp->cltubdev)) 1194 goto out; 1195 1196 rc = PTR_ERR(rp->cltubdev); 1197 device_destroy(class3270, MKDEV(IBM_TTY3270_MAJOR, rp->minor)); 1198 1199 out_ttydev: 1200 sysfs_remove_group(&rp->cdev->dev.kobj, &raw3270_attr_group); 1201 out: 1202 return rc; 1203 } 1204 1205 /* 1206 * Notifier for device addition/removal 1207 */ 1208 struct raw3270_notifier { 1209 struct list_head list; 1210 void (*notifier)(int, int); 1211 }; 1212 1213 static LIST_HEAD(raw3270_notifier); 1214 1215 int raw3270_register_notifier(void (*notifier)(int, int)) 1216 { 1217 struct raw3270_notifier *np; 1218 struct raw3270 *rp; 1219 1220 np = kmalloc(sizeof(struct raw3270_notifier), GFP_KERNEL); 1221 if (!np) 1222 return -ENOMEM; 1223 np->notifier = notifier; 1224 mutex_lock(&raw3270_mutex); 1225 list_add_tail(&np->list, &raw3270_notifier); 1226 list_for_each_entry(rp, &raw3270_devices, list) { 1227 get_device(&rp->cdev->dev); 1228 notifier(rp->minor, 1); 1229 } 1230 mutex_unlock(&raw3270_mutex); 1231 return 0; 1232 } 1233 1234 void raw3270_unregister_notifier(void (*notifier)(int, int)) 1235 { 1236 struct raw3270_notifier *np; 1237 1238 mutex_lock(&raw3270_mutex); 1239 list_for_each_entry(np, &raw3270_notifier, list) 1240 if (np->notifier == notifier) { 1241 list_del(&np->list); 1242 kfree(np); 1243 break; 1244 } 1245 mutex_unlock(&raw3270_mutex); 1246 } 1247 1248 /* 1249 * Set 3270 device online. 1250 */ 1251 static int 1252 raw3270_set_online (struct ccw_device *cdev) 1253 { 1254 struct raw3270 *rp; 1255 struct raw3270_notifier *np; 1256 int rc; 1257 1258 rp = raw3270_create_device(cdev); 1259 if (IS_ERR(rp)) 1260 return PTR_ERR(rp); 1261 rc = raw3270_reset_device(rp); 1262 if (rc) 1263 goto failure; 1264 rc = raw3270_size_device(rp); 1265 if (rc) 1266 goto failure; 1267 rc = raw3270_reset_device(rp); 1268 if (rc) 1269 goto failure; 1270 rc = raw3270_create_attributes(rp); 1271 if (rc) 1272 goto failure; 1273 set_bit(RAW3270_FLAGS_READY, &rp->flags); 1274 mutex_lock(&raw3270_mutex); 1275 list_for_each_entry(np, &raw3270_notifier, list) 1276 np->notifier(rp->minor, 1); 1277 mutex_unlock(&raw3270_mutex); 1278 return 0; 1279 1280 failure: 1281 raw3270_delete_device(rp); 1282 return rc; 1283 } 1284 1285 /* 1286 * Remove 3270 device structure. 1287 */ 1288 static void 1289 raw3270_remove (struct ccw_device *cdev) 1290 { 1291 unsigned long flags; 1292 struct raw3270 *rp; 1293 struct raw3270_view *v; 1294 struct raw3270_notifier *np; 1295 1296 rp = cdev->dev.driver_data; 1297 /* 1298 * _remove is the opposite of _probe; it's probe that 1299 * should set up rp. raw3270_remove gets entered for 1300 * devices even if they haven't been varied online. 1301 * Thus, rp may validly be NULL here. 1302 */ 1303 if (rp == NULL) 1304 return; 1305 clear_bit(RAW3270_FLAGS_READY, &rp->flags); 1306 1307 sysfs_remove_group(&cdev->dev.kobj, &raw3270_attr_group); 1308 1309 /* Deactivate current view and remove all views. */ 1310 spin_lock_irqsave(get_ccwdev_lock(cdev), flags); 1311 if (rp->view) { 1312 rp->view->fn->deactivate(rp->view); 1313 rp->view = NULL; 1314 } 1315 while (!list_empty(&rp->view_list)) { 1316 v = list_entry(rp->view_list.next, struct raw3270_view, list); 1317 if (v->fn->release) 1318 v->fn->release(v); 1319 spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); 1320 raw3270_del_view(v); 1321 spin_lock_irqsave(get_ccwdev_lock(cdev), flags); 1322 } 1323 spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); 1324 1325 mutex_lock(&raw3270_mutex); 1326 list_for_each_entry(np, &raw3270_notifier, list) 1327 np->notifier(rp->minor, 0); 1328 mutex_unlock(&raw3270_mutex); 1329 1330 /* Reset 3270 device. */ 1331 raw3270_reset_device(rp); 1332 /* And finally remove it. */ 1333 raw3270_delete_device(rp); 1334 } 1335 1336 /* 1337 * Set 3270 device offline. 1338 */ 1339 static int 1340 raw3270_set_offline (struct ccw_device *cdev) 1341 { 1342 struct raw3270 *rp; 1343 1344 rp = cdev->dev.driver_data; 1345 if (test_bit(RAW3270_FLAGS_CONSOLE, &rp->flags)) 1346 return -EBUSY; 1347 raw3270_remove(cdev); 1348 return 0; 1349 } 1350 1351 static struct ccw_device_id raw3270_id[] = { 1352 { CCW_DEVICE(0x3270, 0) }, 1353 { CCW_DEVICE(0x3271, 0) }, 1354 { CCW_DEVICE(0x3272, 0) }, 1355 { CCW_DEVICE(0x3273, 0) }, 1356 { CCW_DEVICE(0x3274, 0) }, 1357 { CCW_DEVICE(0x3275, 0) }, 1358 { CCW_DEVICE(0x3276, 0) }, 1359 { CCW_DEVICE(0x3277, 0) }, 1360 { CCW_DEVICE(0x3278, 0) }, 1361 { CCW_DEVICE(0x3279, 0) }, 1362 { CCW_DEVICE(0x3174, 0) }, 1363 { /* end of list */ }, 1364 }; 1365 1366 static struct ccw_driver raw3270_ccw_driver = { 1367 .name = "3270", 1368 .owner = THIS_MODULE, 1369 .ids = raw3270_id, 1370 .probe = &raw3270_probe, 1371 .remove = &raw3270_remove, 1372 .set_online = &raw3270_set_online, 1373 .set_offline = &raw3270_set_offline, 1374 }; 1375 1376 static int 1377 raw3270_init(void) 1378 { 1379 struct raw3270 *rp; 1380 int rc; 1381 1382 if (raw3270_registered) 1383 return 0; 1384 raw3270_registered = 1; 1385 rc = ccw_driver_register(&raw3270_ccw_driver); 1386 if (rc == 0) { 1387 /* Create attributes for early (= console) device. */ 1388 mutex_lock(&raw3270_mutex); 1389 class3270 = class_create(THIS_MODULE, "3270"); 1390 list_for_each_entry(rp, &raw3270_devices, list) { 1391 get_device(&rp->cdev->dev); 1392 raw3270_create_attributes(rp); 1393 } 1394 mutex_unlock(&raw3270_mutex); 1395 } 1396 return rc; 1397 } 1398 1399 static void 1400 raw3270_exit(void) 1401 { 1402 ccw_driver_unregister(&raw3270_ccw_driver); 1403 class_destroy(class3270); 1404 } 1405 1406 MODULE_LICENSE("GPL"); 1407 1408 module_init(raw3270_init); 1409 module_exit(raw3270_exit); 1410 1411 EXPORT_SYMBOL(raw3270_request_alloc); 1412 EXPORT_SYMBOL(raw3270_request_free); 1413 EXPORT_SYMBOL(raw3270_request_reset); 1414 EXPORT_SYMBOL(raw3270_request_set_cmd); 1415 EXPORT_SYMBOL(raw3270_request_add_data); 1416 EXPORT_SYMBOL(raw3270_request_set_data); 1417 EXPORT_SYMBOL(raw3270_request_set_idal); 1418 EXPORT_SYMBOL(raw3270_buffer_address); 1419 EXPORT_SYMBOL(raw3270_add_view); 1420 EXPORT_SYMBOL(raw3270_del_view); 1421 EXPORT_SYMBOL(raw3270_find_view); 1422 EXPORT_SYMBOL(raw3270_activate_view); 1423 EXPORT_SYMBOL(raw3270_deactivate_view); 1424 EXPORT_SYMBOL(raw3270_start); 1425 EXPORT_SYMBOL(raw3270_start_locked); 1426 EXPORT_SYMBOL(raw3270_start_irq); 1427 EXPORT_SYMBOL(raw3270_reset); 1428 EXPORT_SYMBOL(raw3270_register_notifier); 1429 EXPORT_SYMBOL(raw3270_unregister_notifier); 1430 EXPORT_SYMBOL(raw3270_wait_queue); 1431