1 /* 2 * linux/drivers/s390/net/lcs.c 3 * 4 * Linux for S/390 Lan Channel Station Network Driver 5 * 6 * Copyright (C) 1999-2001 IBM Deutschland Entwicklung GmbH, 7 * IBM Corporation 8 * Author(s): Original Code written by 9 * DJ Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com) 10 * Rewritten by 11 * Frank Pavlic (fpavlic@de.ibm.com) and 12 * Martin Schwidefsky <schwidefsky@de.ibm.com> 13 * 14 * This program is free software; you can redistribute it and/or modify 15 * it under the terms of the GNU General Public License as published by 16 * the Free Software Foundation; either version 2, or (at your option) 17 * any later version. 18 * 19 * This program is distributed in the hope that it will be useful, 20 * but WITHOUT ANY WARRANTY; without even the implied warranty of 21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 22 * GNU General Public License for more details. 23 * 24 * You should have received a copy of the GNU General Public License 25 * along with this program; if not, write to the Free Software 26 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 27 */ 28 29 #include <linux/module.h> 30 #include <linux/if.h> 31 #include <linux/netdevice.h> 32 #include <linux/etherdevice.h> 33 #include <linux/trdevice.h> 34 #include <linux/fddidevice.h> 35 #include <linux/inetdevice.h> 36 #include <linux/in.h> 37 #include <linux/igmp.h> 38 #include <linux/delay.h> 39 #include <net/arp.h> 40 #include <net/ip.h> 41 42 #include <asm/debug.h> 43 #include <asm/idals.h> 44 #include <asm/timex.h> 45 #include <linux/device.h> 46 #include <asm/ccwgroup.h> 47 48 #include "lcs.h" 49 #include "cu3088.h" 50 51 52 #if !defined(CONFIG_NET_ETHERNET) && \ 53 !defined(CONFIG_TR) && !defined(CONFIG_FDDI) 54 #error Cannot compile lcs.c without some net devices switched on. 55 #endif 56 57 #define PRINTK_HEADER " lcs: " 58 59 /** 60 * initialization string for output 61 */ 62 63 static char version[] __initdata = "LCS driver"; 64 static char debug_buffer[255]; 65 66 /** 67 * Some prototypes. 68 */ 69 static void lcs_tasklet(unsigned long); 70 static void lcs_start_kernel_thread(struct work_struct *); 71 static void lcs_get_frames_cb(struct lcs_channel *, struct lcs_buffer *); 72 static int lcs_send_delipm(struct lcs_card *, struct lcs_ipm_list *); 73 static int lcs_recovery(void *ptr); 74 75 /** 76 * Debug Facility Stuff 77 */ 78 static debug_info_t *lcs_dbf_setup; 79 static debug_info_t *lcs_dbf_trace; 80 81 /** 82 * LCS Debug Facility functions 83 */ 84 static void 85 lcs_unregister_debug_facility(void) 86 { 87 if (lcs_dbf_setup) 88 debug_unregister(lcs_dbf_setup); 89 if (lcs_dbf_trace) 90 debug_unregister(lcs_dbf_trace); 91 } 92 93 static int 94 lcs_register_debug_facility(void) 95 { 96 lcs_dbf_setup = debug_register("lcs_setup", 2, 1, 8); 97 lcs_dbf_trace = debug_register("lcs_trace", 4, 1, 8); 98 if (lcs_dbf_setup == NULL || lcs_dbf_trace == NULL) { 99 PRINT_ERR("Not enough memory for debug facility.\n"); 100 lcs_unregister_debug_facility(); 101 return -ENOMEM; 102 } 103 debug_register_view(lcs_dbf_setup, &debug_hex_ascii_view); 104 debug_set_level(lcs_dbf_setup, 2); 105 debug_register_view(lcs_dbf_trace, &debug_hex_ascii_view); 106 debug_set_level(lcs_dbf_trace, 2); 107 return 0; 108 } 109 110 /** 111 * Allocate io buffers. 112 */ 113 static int 114 lcs_alloc_channel(struct lcs_channel *channel) 115 { 116 int cnt; 117 118 LCS_DBF_TEXT(2, setup, "ichalloc"); 119 for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) { 120 /* alloc memory fo iobuffer */ 121 channel->iob[cnt].data = 122 kzalloc(LCS_IOBUFFERSIZE, GFP_DMA | GFP_KERNEL); 123 if (channel->iob[cnt].data == NULL) 124 break; 125 channel->iob[cnt].state = LCS_BUF_STATE_EMPTY; 126 } 127 if (cnt < LCS_NUM_BUFFS) { 128 /* Not all io buffers could be allocated. */ 129 LCS_DBF_TEXT(2, setup, "echalloc"); 130 while (cnt-- > 0) 131 kfree(channel->iob[cnt].data); 132 return -ENOMEM; 133 } 134 return 0; 135 } 136 137 /** 138 * Free io buffers. 139 */ 140 static void 141 lcs_free_channel(struct lcs_channel *channel) 142 { 143 int cnt; 144 145 LCS_DBF_TEXT(2, setup, "ichfree"); 146 for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) { 147 kfree(channel->iob[cnt].data); 148 channel->iob[cnt].data = NULL; 149 } 150 } 151 152 /* 153 * Cleanup channel. 154 */ 155 static void 156 lcs_cleanup_channel(struct lcs_channel *channel) 157 { 158 LCS_DBF_TEXT(3, setup, "cleanch"); 159 /* Kill write channel tasklets. */ 160 tasklet_kill(&channel->irq_tasklet); 161 /* Free channel buffers. */ 162 lcs_free_channel(channel); 163 } 164 165 /** 166 * LCS free memory for card and channels. 167 */ 168 static void 169 lcs_free_card(struct lcs_card *card) 170 { 171 LCS_DBF_TEXT(2, setup, "remcard"); 172 LCS_DBF_HEX(2, setup, &card, sizeof(void*)); 173 kfree(card); 174 } 175 176 /** 177 * LCS alloc memory for card and channels 178 */ 179 static struct lcs_card * 180 lcs_alloc_card(void) 181 { 182 struct lcs_card *card; 183 int rc; 184 185 LCS_DBF_TEXT(2, setup, "alloclcs"); 186 187 card = kzalloc(sizeof(struct lcs_card), GFP_KERNEL | GFP_DMA); 188 if (card == NULL) 189 return NULL; 190 card->lan_type = LCS_FRAME_TYPE_AUTO; 191 card->pkt_seq = 0; 192 card->lancmd_timeout = LCS_LANCMD_TIMEOUT_DEFAULT; 193 /* Allocate io buffers for the read channel. */ 194 rc = lcs_alloc_channel(&card->read); 195 if (rc){ 196 LCS_DBF_TEXT(2, setup, "iccwerr"); 197 lcs_free_card(card); 198 return NULL; 199 } 200 /* Allocate io buffers for the write channel. */ 201 rc = lcs_alloc_channel(&card->write); 202 if (rc) { 203 LCS_DBF_TEXT(2, setup, "iccwerr"); 204 lcs_cleanup_channel(&card->read); 205 lcs_free_card(card); 206 return NULL; 207 } 208 209 #ifdef CONFIG_IP_MULTICAST 210 INIT_LIST_HEAD(&card->ipm_list); 211 #endif 212 LCS_DBF_HEX(2, setup, &card, sizeof(void*)); 213 return card; 214 } 215 216 /* 217 * Setup read channel. 218 */ 219 static void 220 lcs_setup_read_ccws(struct lcs_card *card) 221 { 222 int cnt; 223 224 LCS_DBF_TEXT(2, setup, "ireadccw"); 225 /* Setup read ccws. */ 226 memset(card->read.ccws, 0, sizeof (struct ccw1) * (LCS_NUM_BUFFS + 1)); 227 for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) { 228 card->read.ccws[cnt].cmd_code = LCS_CCW_READ; 229 card->read.ccws[cnt].count = LCS_IOBUFFERSIZE; 230 card->read.ccws[cnt].flags = 231 CCW_FLAG_CC | CCW_FLAG_SLI | CCW_FLAG_PCI; 232 /* 233 * Note: we have allocated the buffer with GFP_DMA, so 234 * we do not need to do set_normalized_cda. 235 */ 236 card->read.ccws[cnt].cda = 237 (__u32) __pa(card->read.iob[cnt].data); 238 ((struct lcs_header *) 239 card->read.iob[cnt].data)->offset = LCS_ILLEGAL_OFFSET; 240 card->read.iob[cnt].callback = lcs_get_frames_cb; 241 card->read.iob[cnt].state = LCS_BUF_STATE_READY; 242 card->read.iob[cnt].count = LCS_IOBUFFERSIZE; 243 } 244 card->read.ccws[0].flags &= ~CCW_FLAG_PCI; 245 card->read.ccws[LCS_NUM_BUFFS - 1].flags &= ~CCW_FLAG_PCI; 246 card->read.ccws[LCS_NUM_BUFFS - 1].flags |= CCW_FLAG_SUSPEND; 247 /* Last ccw is a tic (transfer in channel). */ 248 card->read.ccws[LCS_NUM_BUFFS].cmd_code = LCS_CCW_TRANSFER; 249 card->read.ccws[LCS_NUM_BUFFS].cda = 250 (__u32) __pa(card->read.ccws); 251 /* Setg initial state of the read channel. */ 252 card->read.state = LCS_CH_STATE_INIT; 253 254 card->read.io_idx = 0; 255 card->read.buf_idx = 0; 256 } 257 258 static void 259 lcs_setup_read(struct lcs_card *card) 260 { 261 LCS_DBF_TEXT(3, setup, "initread"); 262 263 lcs_setup_read_ccws(card); 264 /* Initialize read channel tasklet. */ 265 card->read.irq_tasklet.data = (unsigned long) &card->read; 266 card->read.irq_tasklet.func = lcs_tasklet; 267 /* Initialize waitqueue. */ 268 init_waitqueue_head(&card->read.wait_q); 269 } 270 271 /* 272 * Setup write channel. 273 */ 274 static void 275 lcs_setup_write_ccws(struct lcs_card *card) 276 { 277 int cnt; 278 279 LCS_DBF_TEXT(3, setup, "iwritccw"); 280 /* Setup write ccws. */ 281 memset(card->write.ccws, 0, sizeof(struct ccw1) * LCS_NUM_BUFFS + 1); 282 for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) { 283 card->write.ccws[cnt].cmd_code = LCS_CCW_WRITE; 284 card->write.ccws[cnt].count = 0; 285 card->write.ccws[cnt].flags = 286 CCW_FLAG_SUSPEND | CCW_FLAG_CC | CCW_FLAG_SLI; 287 /* 288 * Note: we have allocated the buffer with GFP_DMA, so 289 * we do not need to do set_normalized_cda. 290 */ 291 card->write.ccws[cnt].cda = 292 (__u32) __pa(card->write.iob[cnt].data); 293 } 294 /* Last ccw is a tic (transfer in channel). */ 295 card->write.ccws[LCS_NUM_BUFFS].cmd_code = LCS_CCW_TRANSFER; 296 card->write.ccws[LCS_NUM_BUFFS].cda = 297 (__u32) __pa(card->write.ccws); 298 /* Set initial state of the write channel. */ 299 card->read.state = LCS_CH_STATE_INIT; 300 301 card->write.io_idx = 0; 302 card->write.buf_idx = 0; 303 } 304 305 static void 306 lcs_setup_write(struct lcs_card *card) 307 { 308 LCS_DBF_TEXT(3, setup, "initwrit"); 309 310 lcs_setup_write_ccws(card); 311 /* Initialize write channel tasklet. */ 312 card->write.irq_tasklet.data = (unsigned long) &card->write; 313 card->write.irq_tasklet.func = lcs_tasklet; 314 /* Initialize waitqueue. */ 315 init_waitqueue_head(&card->write.wait_q); 316 } 317 318 static void 319 lcs_set_allowed_threads(struct lcs_card *card, unsigned long threads) 320 { 321 unsigned long flags; 322 323 spin_lock_irqsave(&card->mask_lock, flags); 324 card->thread_allowed_mask = threads; 325 spin_unlock_irqrestore(&card->mask_lock, flags); 326 wake_up(&card->wait_q); 327 } 328 static inline int 329 lcs_threads_running(struct lcs_card *card, unsigned long threads) 330 { 331 unsigned long flags; 332 int rc = 0; 333 334 spin_lock_irqsave(&card->mask_lock, flags); 335 rc = (card->thread_running_mask & threads); 336 spin_unlock_irqrestore(&card->mask_lock, flags); 337 return rc; 338 } 339 340 static int 341 lcs_wait_for_threads(struct lcs_card *card, unsigned long threads) 342 { 343 return wait_event_interruptible(card->wait_q, 344 lcs_threads_running(card, threads) == 0); 345 } 346 347 static inline int 348 lcs_set_thread_start_bit(struct lcs_card *card, unsigned long thread) 349 { 350 unsigned long flags; 351 352 spin_lock_irqsave(&card->mask_lock, flags); 353 if ( !(card->thread_allowed_mask & thread) || 354 (card->thread_start_mask & thread) ) { 355 spin_unlock_irqrestore(&card->mask_lock, flags); 356 return -EPERM; 357 } 358 card->thread_start_mask |= thread; 359 spin_unlock_irqrestore(&card->mask_lock, flags); 360 return 0; 361 } 362 363 static void 364 lcs_clear_thread_running_bit(struct lcs_card *card, unsigned long thread) 365 { 366 unsigned long flags; 367 368 spin_lock_irqsave(&card->mask_lock, flags); 369 card->thread_running_mask &= ~thread; 370 spin_unlock_irqrestore(&card->mask_lock, flags); 371 wake_up(&card->wait_q); 372 } 373 374 static inline int 375 __lcs_do_run_thread(struct lcs_card *card, unsigned long thread) 376 { 377 unsigned long flags; 378 int rc = 0; 379 380 spin_lock_irqsave(&card->mask_lock, flags); 381 if (card->thread_start_mask & thread){ 382 if ((card->thread_allowed_mask & thread) && 383 !(card->thread_running_mask & thread)){ 384 rc = 1; 385 card->thread_start_mask &= ~thread; 386 card->thread_running_mask |= thread; 387 } else 388 rc = -EPERM; 389 } 390 spin_unlock_irqrestore(&card->mask_lock, flags); 391 return rc; 392 } 393 394 static int 395 lcs_do_run_thread(struct lcs_card *card, unsigned long thread) 396 { 397 int rc = 0; 398 wait_event(card->wait_q, 399 (rc = __lcs_do_run_thread(card, thread)) >= 0); 400 return rc; 401 } 402 403 static int 404 lcs_do_start_thread(struct lcs_card *card, unsigned long thread) 405 { 406 unsigned long flags; 407 int rc = 0; 408 409 spin_lock_irqsave(&card->mask_lock, flags); 410 LCS_DBF_TEXT_(4, trace, " %02x%02x%02x", 411 (u8) card->thread_start_mask, 412 (u8) card->thread_allowed_mask, 413 (u8) card->thread_running_mask); 414 rc = (card->thread_start_mask & thread); 415 spin_unlock_irqrestore(&card->mask_lock, flags); 416 return rc; 417 } 418 419 /** 420 * Initialize channels,card and state machines. 421 */ 422 static void 423 lcs_setup_card(struct lcs_card *card) 424 { 425 LCS_DBF_TEXT(2, setup, "initcard"); 426 LCS_DBF_HEX(2, setup, &card, sizeof(void*)); 427 428 lcs_setup_read(card); 429 lcs_setup_write(card); 430 /* Set cards initial state. */ 431 card->state = DEV_STATE_DOWN; 432 card->tx_buffer = NULL; 433 card->tx_emitted = 0; 434 435 init_waitqueue_head(&card->wait_q); 436 spin_lock_init(&card->lock); 437 spin_lock_init(&card->ipm_lock); 438 spin_lock_init(&card->mask_lock); 439 #ifdef CONFIG_IP_MULTICAST 440 INIT_LIST_HEAD(&card->ipm_list); 441 #endif 442 INIT_LIST_HEAD(&card->lancmd_waiters); 443 } 444 445 static inline void 446 lcs_clear_multicast_list(struct lcs_card *card) 447 { 448 #ifdef CONFIG_IP_MULTICAST 449 struct lcs_ipm_list *ipm; 450 unsigned long flags; 451 452 /* Free multicast list. */ 453 LCS_DBF_TEXT(3, setup, "clmclist"); 454 spin_lock_irqsave(&card->ipm_lock, flags); 455 while (!list_empty(&card->ipm_list)){ 456 ipm = list_entry(card->ipm_list.next, 457 struct lcs_ipm_list, list); 458 list_del(&ipm->list); 459 if (ipm->ipm_state != LCS_IPM_STATE_SET_REQUIRED){ 460 spin_unlock_irqrestore(&card->ipm_lock, flags); 461 lcs_send_delipm(card, ipm); 462 spin_lock_irqsave(&card->ipm_lock, flags); 463 } 464 kfree(ipm); 465 } 466 spin_unlock_irqrestore(&card->ipm_lock, flags); 467 #endif 468 } 469 /** 470 * Cleanup channels,card and state machines. 471 */ 472 static void 473 lcs_cleanup_card(struct lcs_card *card) 474 { 475 476 LCS_DBF_TEXT(3, setup, "cleancrd"); 477 LCS_DBF_HEX(2,setup,&card,sizeof(void*)); 478 479 if (card->dev != NULL) 480 free_netdev(card->dev); 481 /* Cleanup channels. */ 482 lcs_cleanup_channel(&card->write); 483 lcs_cleanup_channel(&card->read); 484 } 485 486 /** 487 * Start channel. 488 */ 489 static int 490 lcs_start_channel(struct lcs_channel *channel) 491 { 492 unsigned long flags; 493 int rc; 494 495 LCS_DBF_TEXT_(4, trace,"ssch%s", dev_name(&channel->ccwdev->dev)); 496 spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); 497 rc = ccw_device_start(channel->ccwdev, 498 channel->ccws + channel->io_idx, 0, 0, 499 DOIO_DENY_PREFETCH | DOIO_ALLOW_SUSPEND); 500 if (rc == 0) 501 channel->state = LCS_CH_STATE_RUNNING; 502 spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); 503 if (rc) { 504 LCS_DBF_TEXT_(4,trace,"essh%s", 505 dev_name(&channel->ccwdev->dev)); 506 PRINT_ERR("Error in starting channel, rc=%d!\n", rc); 507 } 508 return rc; 509 } 510 511 static int 512 lcs_clear_channel(struct lcs_channel *channel) 513 { 514 unsigned long flags; 515 int rc; 516 517 LCS_DBF_TEXT(4,trace,"clearch"); 518 LCS_DBF_TEXT_(4, trace, "%s", dev_name(&channel->ccwdev->dev)); 519 spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); 520 rc = ccw_device_clear(channel->ccwdev, (addr_t) channel); 521 spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); 522 if (rc) { 523 LCS_DBF_TEXT_(4, trace, "ecsc%s", 524 dev_name(&channel->ccwdev->dev)); 525 return rc; 526 } 527 wait_event(channel->wait_q, (channel->state == LCS_CH_STATE_CLEARED)); 528 channel->state = LCS_CH_STATE_STOPPED; 529 return rc; 530 } 531 532 533 /** 534 * Stop channel. 535 */ 536 static int 537 lcs_stop_channel(struct lcs_channel *channel) 538 { 539 unsigned long flags; 540 int rc; 541 542 if (channel->state == LCS_CH_STATE_STOPPED) 543 return 0; 544 LCS_DBF_TEXT(4,trace,"haltsch"); 545 LCS_DBF_TEXT_(4, trace, "%s", dev_name(&channel->ccwdev->dev)); 546 channel->state = LCS_CH_STATE_INIT; 547 spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); 548 rc = ccw_device_halt(channel->ccwdev, (addr_t) channel); 549 spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); 550 if (rc) { 551 LCS_DBF_TEXT_(4, trace, "ehsc%s", 552 dev_name(&channel->ccwdev->dev)); 553 return rc; 554 } 555 /* Asynchronous halt initialted. Wait for its completion. */ 556 wait_event(channel->wait_q, (channel->state == LCS_CH_STATE_HALTED)); 557 lcs_clear_channel(channel); 558 return 0; 559 } 560 561 /** 562 * start read and write channel 563 */ 564 static int 565 lcs_start_channels(struct lcs_card *card) 566 { 567 int rc; 568 569 LCS_DBF_TEXT(2, trace, "chstart"); 570 /* start read channel */ 571 rc = lcs_start_channel(&card->read); 572 if (rc) 573 return rc; 574 /* start write channel */ 575 rc = lcs_start_channel(&card->write); 576 if (rc) 577 lcs_stop_channel(&card->read); 578 return rc; 579 } 580 581 /** 582 * stop read and write channel 583 */ 584 static int 585 lcs_stop_channels(struct lcs_card *card) 586 { 587 LCS_DBF_TEXT(2, trace, "chhalt"); 588 lcs_stop_channel(&card->read); 589 lcs_stop_channel(&card->write); 590 return 0; 591 } 592 593 /** 594 * Get empty buffer. 595 */ 596 static struct lcs_buffer * 597 __lcs_get_buffer(struct lcs_channel *channel) 598 { 599 int index; 600 601 LCS_DBF_TEXT(5, trace, "_getbuff"); 602 index = channel->io_idx; 603 do { 604 if (channel->iob[index].state == LCS_BUF_STATE_EMPTY) { 605 channel->iob[index].state = LCS_BUF_STATE_LOCKED; 606 return channel->iob + index; 607 } 608 index = (index + 1) & (LCS_NUM_BUFFS - 1); 609 } while (index != channel->io_idx); 610 return NULL; 611 } 612 613 static struct lcs_buffer * 614 lcs_get_buffer(struct lcs_channel *channel) 615 { 616 struct lcs_buffer *buffer; 617 unsigned long flags; 618 619 LCS_DBF_TEXT(5, trace, "getbuff"); 620 spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); 621 buffer = __lcs_get_buffer(channel); 622 spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); 623 return buffer; 624 } 625 626 /** 627 * Resume channel program if the channel is suspended. 628 */ 629 static int 630 __lcs_resume_channel(struct lcs_channel *channel) 631 { 632 int rc; 633 634 if (channel->state != LCS_CH_STATE_SUSPENDED) 635 return 0; 636 if (channel->ccws[channel->io_idx].flags & CCW_FLAG_SUSPEND) 637 return 0; 638 LCS_DBF_TEXT_(5, trace, "rsch%s", dev_name(&channel->ccwdev->dev)); 639 rc = ccw_device_resume(channel->ccwdev); 640 if (rc) { 641 LCS_DBF_TEXT_(4, trace, "ersc%s", 642 dev_name(&channel->ccwdev->dev)); 643 PRINT_ERR("Error in lcs_resume_channel: rc=%d\n",rc); 644 } else 645 channel->state = LCS_CH_STATE_RUNNING; 646 return rc; 647 648 } 649 650 /** 651 * Make a buffer ready for processing. 652 */ 653 static inline void 654 __lcs_ready_buffer_bits(struct lcs_channel *channel, int index) 655 { 656 int prev, next; 657 658 LCS_DBF_TEXT(5, trace, "rdybits"); 659 prev = (index - 1) & (LCS_NUM_BUFFS - 1); 660 next = (index + 1) & (LCS_NUM_BUFFS - 1); 661 /* Check if we may clear the suspend bit of this buffer. */ 662 if (channel->ccws[next].flags & CCW_FLAG_SUSPEND) { 663 /* Check if we have to set the PCI bit. */ 664 if (!(channel->ccws[prev].flags & CCW_FLAG_SUSPEND)) 665 /* Suspend bit of the previous buffer is not set. */ 666 channel->ccws[index].flags |= CCW_FLAG_PCI; 667 /* Suspend bit of the next buffer is set. */ 668 channel->ccws[index].flags &= ~CCW_FLAG_SUSPEND; 669 } 670 } 671 672 static int 673 lcs_ready_buffer(struct lcs_channel *channel, struct lcs_buffer *buffer) 674 { 675 unsigned long flags; 676 int index, rc; 677 678 LCS_DBF_TEXT(5, trace, "rdybuff"); 679 BUG_ON(buffer->state != LCS_BUF_STATE_LOCKED && 680 buffer->state != LCS_BUF_STATE_PROCESSED); 681 spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); 682 buffer->state = LCS_BUF_STATE_READY; 683 index = buffer - channel->iob; 684 /* Set length. */ 685 channel->ccws[index].count = buffer->count; 686 /* Check relevant PCI/suspend bits. */ 687 __lcs_ready_buffer_bits(channel, index); 688 rc = __lcs_resume_channel(channel); 689 spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); 690 return rc; 691 } 692 693 /** 694 * Mark the buffer as processed. Take care of the suspend bit 695 * of the previous buffer. This function is called from 696 * interrupt context, so the lock must not be taken. 697 */ 698 static int 699 __lcs_processed_buffer(struct lcs_channel *channel, struct lcs_buffer *buffer) 700 { 701 int index, prev, next; 702 703 LCS_DBF_TEXT(5, trace, "prcsbuff"); 704 BUG_ON(buffer->state != LCS_BUF_STATE_READY); 705 buffer->state = LCS_BUF_STATE_PROCESSED; 706 index = buffer - channel->iob; 707 prev = (index - 1) & (LCS_NUM_BUFFS - 1); 708 next = (index + 1) & (LCS_NUM_BUFFS - 1); 709 /* Set the suspend bit and clear the PCI bit of this buffer. */ 710 channel->ccws[index].flags |= CCW_FLAG_SUSPEND; 711 channel->ccws[index].flags &= ~CCW_FLAG_PCI; 712 /* Check the suspend bit of the previous buffer. */ 713 if (channel->iob[prev].state == LCS_BUF_STATE_READY) { 714 /* 715 * Previous buffer is in state ready. It might have 716 * happened in lcs_ready_buffer that the suspend bit 717 * has not been cleared to avoid an endless loop. 718 * Do it now. 719 */ 720 __lcs_ready_buffer_bits(channel, prev); 721 } 722 /* Clear PCI bit of next buffer. */ 723 channel->ccws[next].flags &= ~CCW_FLAG_PCI; 724 return __lcs_resume_channel(channel); 725 } 726 727 /** 728 * Put a processed buffer back to state empty. 729 */ 730 static void 731 lcs_release_buffer(struct lcs_channel *channel, struct lcs_buffer *buffer) 732 { 733 unsigned long flags; 734 735 LCS_DBF_TEXT(5, trace, "relbuff"); 736 BUG_ON(buffer->state != LCS_BUF_STATE_LOCKED && 737 buffer->state != LCS_BUF_STATE_PROCESSED); 738 spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); 739 buffer->state = LCS_BUF_STATE_EMPTY; 740 spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); 741 } 742 743 /** 744 * Get buffer for a lan command. 745 */ 746 static struct lcs_buffer * 747 lcs_get_lancmd(struct lcs_card *card, int count) 748 { 749 struct lcs_buffer *buffer; 750 struct lcs_cmd *cmd; 751 752 LCS_DBF_TEXT(4, trace, "getlncmd"); 753 /* Get buffer and wait if none is available. */ 754 wait_event(card->write.wait_q, 755 ((buffer = lcs_get_buffer(&card->write)) != NULL)); 756 count += sizeof(struct lcs_header); 757 *(__u16 *)(buffer->data + count) = 0; 758 buffer->count = count + sizeof(__u16); 759 buffer->callback = lcs_release_buffer; 760 cmd = (struct lcs_cmd *) buffer->data; 761 cmd->offset = count; 762 cmd->type = LCS_FRAME_TYPE_CONTROL; 763 cmd->slot = 0; 764 return buffer; 765 } 766 767 768 static void 769 lcs_get_reply(struct lcs_reply *reply) 770 { 771 WARN_ON(atomic_read(&reply->refcnt) <= 0); 772 atomic_inc(&reply->refcnt); 773 } 774 775 static void 776 lcs_put_reply(struct lcs_reply *reply) 777 { 778 WARN_ON(atomic_read(&reply->refcnt) <= 0); 779 if (atomic_dec_and_test(&reply->refcnt)) { 780 kfree(reply); 781 } 782 783 } 784 785 static struct lcs_reply * 786 lcs_alloc_reply(struct lcs_cmd *cmd) 787 { 788 struct lcs_reply *reply; 789 790 LCS_DBF_TEXT(4, trace, "getreply"); 791 792 reply = kzalloc(sizeof(struct lcs_reply), GFP_ATOMIC); 793 if (!reply) 794 return NULL; 795 atomic_set(&reply->refcnt,1); 796 reply->sequence_no = cmd->sequence_no; 797 reply->received = 0; 798 reply->rc = 0; 799 init_waitqueue_head(&reply->wait_q); 800 801 return reply; 802 } 803 804 /** 805 * Notifier function for lancmd replies. Called from read irq. 806 */ 807 static void 808 lcs_notify_lancmd_waiters(struct lcs_card *card, struct lcs_cmd *cmd) 809 { 810 struct list_head *l, *n; 811 struct lcs_reply *reply; 812 813 LCS_DBF_TEXT(4, trace, "notiwait"); 814 spin_lock(&card->lock); 815 list_for_each_safe(l, n, &card->lancmd_waiters) { 816 reply = list_entry(l, struct lcs_reply, list); 817 if (reply->sequence_no == cmd->sequence_no) { 818 lcs_get_reply(reply); 819 list_del_init(&reply->list); 820 if (reply->callback != NULL) 821 reply->callback(card, cmd); 822 reply->received = 1; 823 reply->rc = cmd->return_code; 824 wake_up(&reply->wait_q); 825 lcs_put_reply(reply); 826 break; 827 } 828 } 829 spin_unlock(&card->lock); 830 } 831 832 /** 833 * Emit buffer of a lan comand. 834 */ 835 static void 836 lcs_lancmd_timeout(unsigned long data) 837 { 838 struct lcs_reply *reply, *list_reply, *r; 839 unsigned long flags; 840 841 LCS_DBF_TEXT(4, trace, "timeout"); 842 reply = (struct lcs_reply *) data; 843 spin_lock_irqsave(&reply->card->lock, flags); 844 list_for_each_entry_safe(list_reply, r, 845 &reply->card->lancmd_waiters,list) { 846 if (reply == list_reply) { 847 lcs_get_reply(reply); 848 list_del_init(&reply->list); 849 spin_unlock_irqrestore(&reply->card->lock, flags); 850 reply->received = 1; 851 reply->rc = -ETIME; 852 wake_up(&reply->wait_q); 853 lcs_put_reply(reply); 854 return; 855 } 856 } 857 spin_unlock_irqrestore(&reply->card->lock, flags); 858 } 859 860 static int 861 lcs_send_lancmd(struct lcs_card *card, struct lcs_buffer *buffer, 862 void (*reply_callback)(struct lcs_card *, struct lcs_cmd *)) 863 { 864 struct lcs_reply *reply; 865 struct lcs_cmd *cmd; 866 struct timer_list timer; 867 unsigned long flags; 868 int rc; 869 870 LCS_DBF_TEXT(4, trace, "sendcmd"); 871 cmd = (struct lcs_cmd *) buffer->data; 872 cmd->return_code = 0; 873 cmd->sequence_no = card->sequence_no++; 874 reply = lcs_alloc_reply(cmd); 875 if (!reply) 876 return -ENOMEM; 877 reply->callback = reply_callback; 878 reply->card = card; 879 spin_lock_irqsave(&card->lock, flags); 880 list_add_tail(&reply->list, &card->lancmd_waiters); 881 spin_unlock_irqrestore(&card->lock, flags); 882 883 buffer->callback = lcs_release_buffer; 884 rc = lcs_ready_buffer(&card->write, buffer); 885 if (rc) 886 return rc; 887 init_timer(&timer); 888 timer.function = lcs_lancmd_timeout; 889 timer.data = (unsigned long) reply; 890 timer.expires = jiffies + HZ*card->lancmd_timeout; 891 add_timer(&timer); 892 wait_event(reply->wait_q, reply->received); 893 del_timer_sync(&timer); 894 LCS_DBF_TEXT_(4, trace, "rc:%d",reply->rc); 895 rc = reply->rc; 896 lcs_put_reply(reply); 897 return rc ? -EIO : 0; 898 } 899 900 /** 901 * LCS startup command 902 */ 903 static int 904 lcs_send_startup(struct lcs_card *card, __u8 initiator) 905 { 906 struct lcs_buffer *buffer; 907 struct lcs_cmd *cmd; 908 909 LCS_DBF_TEXT(2, trace, "startup"); 910 buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); 911 cmd = (struct lcs_cmd *) buffer->data; 912 cmd->cmd_code = LCS_CMD_STARTUP; 913 cmd->initiator = initiator; 914 cmd->cmd.lcs_startup.buff_size = LCS_IOBUFFERSIZE; 915 return lcs_send_lancmd(card, buffer, NULL); 916 } 917 918 /** 919 * LCS shutdown command 920 */ 921 static int 922 lcs_send_shutdown(struct lcs_card *card) 923 { 924 struct lcs_buffer *buffer; 925 struct lcs_cmd *cmd; 926 927 LCS_DBF_TEXT(2, trace, "shutdown"); 928 buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); 929 cmd = (struct lcs_cmd *) buffer->data; 930 cmd->cmd_code = LCS_CMD_SHUTDOWN; 931 cmd->initiator = LCS_INITIATOR_TCPIP; 932 return lcs_send_lancmd(card, buffer, NULL); 933 } 934 935 /** 936 * LCS lanstat command 937 */ 938 static void 939 __lcs_lanstat_cb(struct lcs_card *card, struct lcs_cmd *cmd) 940 { 941 LCS_DBF_TEXT(2, trace, "statcb"); 942 memcpy(card->mac, cmd->cmd.lcs_lanstat_cmd.mac_addr, LCS_MAC_LENGTH); 943 } 944 945 static int 946 lcs_send_lanstat(struct lcs_card *card) 947 { 948 struct lcs_buffer *buffer; 949 struct lcs_cmd *cmd; 950 951 LCS_DBF_TEXT(2,trace, "cmdstat"); 952 buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); 953 cmd = (struct lcs_cmd *) buffer->data; 954 /* Setup lanstat command. */ 955 cmd->cmd_code = LCS_CMD_LANSTAT; 956 cmd->initiator = LCS_INITIATOR_TCPIP; 957 cmd->cmd.lcs_std_cmd.lan_type = card->lan_type; 958 cmd->cmd.lcs_std_cmd.portno = card->portno; 959 return lcs_send_lancmd(card, buffer, __lcs_lanstat_cb); 960 } 961 962 /** 963 * send stoplan command 964 */ 965 static int 966 lcs_send_stoplan(struct lcs_card *card, __u8 initiator) 967 { 968 struct lcs_buffer *buffer; 969 struct lcs_cmd *cmd; 970 971 LCS_DBF_TEXT(2, trace, "cmdstpln"); 972 buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); 973 cmd = (struct lcs_cmd *) buffer->data; 974 cmd->cmd_code = LCS_CMD_STOPLAN; 975 cmd->initiator = initiator; 976 cmd->cmd.lcs_std_cmd.lan_type = card->lan_type; 977 cmd->cmd.lcs_std_cmd.portno = card->portno; 978 return lcs_send_lancmd(card, buffer, NULL); 979 } 980 981 /** 982 * send startlan command 983 */ 984 static void 985 __lcs_send_startlan_cb(struct lcs_card *card, struct lcs_cmd *cmd) 986 { 987 LCS_DBF_TEXT(2, trace, "srtlancb"); 988 card->lan_type = cmd->cmd.lcs_std_cmd.lan_type; 989 card->portno = cmd->cmd.lcs_std_cmd.portno; 990 } 991 992 static int 993 lcs_send_startlan(struct lcs_card *card, __u8 initiator) 994 { 995 struct lcs_buffer *buffer; 996 struct lcs_cmd *cmd; 997 998 LCS_DBF_TEXT(2, trace, "cmdstaln"); 999 buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); 1000 cmd = (struct lcs_cmd *) buffer->data; 1001 cmd->cmd_code = LCS_CMD_STARTLAN; 1002 cmd->initiator = initiator; 1003 cmd->cmd.lcs_std_cmd.lan_type = card->lan_type; 1004 cmd->cmd.lcs_std_cmd.portno = card->portno; 1005 return lcs_send_lancmd(card, buffer, __lcs_send_startlan_cb); 1006 } 1007 1008 #ifdef CONFIG_IP_MULTICAST 1009 /** 1010 * send setipm command (Multicast) 1011 */ 1012 static int 1013 lcs_send_setipm(struct lcs_card *card,struct lcs_ipm_list *ipm_list) 1014 { 1015 struct lcs_buffer *buffer; 1016 struct lcs_cmd *cmd; 1017 1018 LCS_DBF_TEXT(2, trace, "cmdsetim"); 1019 buffer = lcs_get_lancmd(card, LCS_MULTICAST_CMD_SIZE); 1020 cmd = (struct lcs_cmd *) buffer->data; 1021 cmd->cmd_code = LCS_CMD_SETIPM; 1022 cmd->initiator = LCS_INITIATOR_TCPIP; 1023 cmd->cmd.lcs_qipassist.lan_type = card->lan_type; 1024 cmd->cmd.lcs_qipassist.portno = card->portno; 1025 cmd->cmd.lcs_qipassist.version = 4; 1026 cmd->cmd.lcs_qipassist.num_ip_pairs = 1; 1027 memcpy(cmd->cmd.lcs_qipassist.lcs_ipass_ctlmsg.ip_mac_pair, 1028 &ipm_list->ipm, sizeof (struct lcs_ip_mac_pair)); 1029 LCS_DBF_TEXT_(2, trace, "%x",ipm_list->ipm.ip_addr); 1030 return lcs_send_lancmd(card, buffer, NULL); 1031 } 1032 1033 /** 1034 * send delipm command (Multicast) 1035 */ 1036 static int 1037 lcs_send_delipm(struct lcs_card *card,struct lcs_ipm_list *ipm_list) 1038 { 1039 struct lcs_buffer *buffer; 1040 struct lcs_cmd *cmd; 1041 1042 LCS_DBF_TEXT(2, trace, "cmddelim"); 1043 buffer = lcs_get_lancmd(card, LCS_MULTICAST_CMD_SIZE); 1044 cmd = (struct lcs_cmd *) buffer->data; 1045 cmd->cmd_code = LCS_CMD_DELIPM; 1046 cmd->initiator = LCS_INITIATOR_TCPIP; 1047 cmd->cmd.lcs_qipassist.lan_type = card->lan_type; 1048 cmd->cmd.lcs_qipassist.portno = card->portno; 1049 cmd->cmd.lcs_qipassist.version = 4; 1050 cmd->cmd.lcs_qipassist.num_ip_pairs = 1; 1051 memcpy(cmd->cmd.lcs_qipassist.lcs_ipass_ctlmsg.ip_mac_pair, 1052 &ipm_list->ipm, sizeof (struct lcs_ip_mac_pair)); 1053 LCS_DBF_TEXT_(2, trace, "%x",ipm_list->ipm.ip_addr); 1054 return lcs_send_lancmd(card, buffer, NULL); 1055 } 1056 1057 /** 1058 * check if multicast is supported by LCS 1059 */ 1060 static void 1061 __lcs_check_multicast_cb(struct lcs_card *card, struct lcs_cmd *cmd) 1062 { 1063 LCS_DBF_TEXT(2, trace, "chkmccb"); 1064 card->ip_assists_supported = 1065 cmd->cmd.lcs_qipassist.ip_assists_supported; 1066 card->ip_assists_enabled = 1067 cmd->cmd.lcs_qipassist.ip_assists_enabled; 1068 } 1069 1070 static int 1071 lcs_check_multicast_support(struct lcs_card *card) 1072 { 1073 struct lcs_buffer *buffer; 1074 struct lcs_cmd *cmd; 1075 int rc; 1076 1077 LCS_DBF_TEXT(2, trace, "cmdqipa"); 1078 /* Send query ipassist. */ 1079 buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); 1080 cmd = (struct lcs_cmd *) buffer->data; 1081 cmd->cmd_code = LCS_CMD_QIPASSIST; 1082 cmd->initiator = LCS_INITIATOR_TCPIP; 1083 cmd->cmd.lcs_qipassist.lan_type = card->lan_type; 1084 cmd->cmd.lcs_qipassist.portno = card->portno; 1085 cmd->cmd.lcs_qipassist.version = 4; 1086 cmd->cmd.lcs_qipassist.num_ip_pairs = 1; 1087 rc = lcs_send_lancmd(card, buffer, __lcs_check_multicast_cb); 1088 if (rc != 0) { 1089 PRINT_ERR("Query IPAssist failed. Assuming unsupported!\n"); 1090 return -EOPNOTSUPP; 1091 } 1092 if (card->ip_assists_supported & LCS_IPASS_MULTICAST_SUPPORT) 1093 return 0; 1094 return -EOPNOTSUPP; 1095 } 1096 1097 /** 1098 * set or del multicast address on LCS card 1099 */ 1100 static void 1101 lcs_fix_multicast_list(struct lcs_card *card) 1102 { 1103 struct list_head failed_list; 1104 struct lcs_ipm_list *ipm, *tmp; 1105 unsigned long flags; 1106 int rc; 1107 1108 LCS_DBF_TEXT(4,trace, "fixipm"); 1109 INIT_LIST_HEAD(&failed_list); 1110 spin_lock_irqsave(&card->ipm_lock, flags); 1111 list_modified: 1112 list_for_each_entry_safe(ipm, tmp, &card->ipm_list, list){ 1113 switch (ipm->ipm_state) { 1114 case LCS_IPM_STATE_SET_REQUIRED: 1115 /* del from ipm_list so noone else can tamper with 1116 * this entry */ 1117 list_del_init(&ipm->list); 1118 spin_unlock_irqrestore(&card->ipm_lock, flags); 1119 rc = lcs_send_setipm(card, ipm); 1120 spin_lock_irqsave(&card->ipm_lock, flags); 1121 if (rc) { 1122 PRINT_INFO("Adding multicast address failed. " 1123 "Table possibly full!\n"); 1124 /* store ipm in failed list -> will be added 1125 * to ipm_list again, so a retry will be done 1126 * during the next call of this function */ 1127 list_add_tail(&ipm->list, &failed_list); 1128 } else { 1129 ipm->ipm_state = LCS_IPM_STATE_ON_CARD; 1130 /* re-insert into ipm_list */ 1131 list_add_tail(&ipm->list, &card->ipm_list); 1132 } 1133 goto list_modified; 1134 case LCS_IPM_STATE_DEL_REQUIRED: 1135 list_del(&ipm->list); 1136 spin_unlock_irqrestore(&card->ipm_lock, flags); 1137 lcs_send_delipm(card, ipm); 1138 spin_lock_irqsave(&card->ipm_lock, flags); 1139 kfree(ipm); 1140 goto list_modified; 1141 case LCS_IPM_STATE_ON_CARD: 1142 break; 1143 } 1144 } 1145 /* re-insert all entries from the failed_list into ipm_list */ 1146 list_for_each_entry_safe(ipm, tmp, &failed_list, list) 1147 list_move_tail(&ipm->list, &card->ipm_list); 1148 1149 spin_unlock_irqrestore(&card->ipm_lock, flags); 1150 } 1151 1152 /** 1153 * get mac address for the relevant Multicast address 1154 */ 1155 static void 1156 lcs_get_mac_for_ipm(__be32 ipm, char *mac, struct net_device *dev) 1157 { 1158 LCS_DBF_TEXT(4,trace, "getmac"); 1159 if (dev->type == ARPHRD_IEEE802_TR) 1160 ip_tr_mc_map(ipm, mac); 1161 else 1162 ip_eth_mc_map(ipm, mac); 1163 } 1164 1165 /** 1166 * function called by net device to handle multicast address relevant things 1167 */ 1168 static inline void 1169 lcs_remove_mc_addresses(struct lcs_card *card, struct in_device *in4_dev) 1170 { 1171 struct ip_mc_list *im4; 1172 struct list_head *l; 1173 struct lcs_ipm_list *ipm; 1174 unsigned long flags; 1175 char buf[MAX_ADDR_LEN]; 1176 1177 LCS_DBF_TEXT(4, trace, "remmclst"); 1178 spin_lock_irqsave(&card->ipm_lock, flags); 1179 list_for_each(l, &card->ipm_list) { 1180 ipm = list_entry(l, struct lcs_ipm_list, list); 1181 for (im4 = in4_dev->mc_list; im4 != NULL; im4 = im4->next) { 1182 lcs_get_mac_for_ipm(im4->multiaddr, buf, card->dev); 1183 if ( (ipm->ipm.ip_addr == im4->multiaddr) && 1184 (memcmp(buf, &ipm->ipm.mac_addr, 1185 LCS_MAC_LENGTH) == 0) ) 1186 break; 1187 } 1188 if (im4 == NULL) 1189 ipm->ipm_state = LCS_IPM_STATE_DEL_REQUIRED; 1190 } 1191 spin_unlock_irqrestore(&card->ipm_lock, flags); 1192 } 1193 1194 static inline struct lcs_ipm_list * 1195 lcs_check_addr_entry(struct lcs_card *card, struct ip_mc_list *im4, char *buf) 1196 { 1197 struct lcs_ipm_list *tmp, *ipm = NULL; 1198 struct list_head *l; 1199 unsigned long flags; 1200 1201 LCS_DBF_TEXT(4, trace, "chkmcent"); 1202 spin_lock_irqsave(&card->ipm_lock, flags); 1203 list_for_each(l, &card->ipm_list) { 1204 tmp = list_entry(l, struct lcs_ipm_list, list); 1205 if ( (tmp->ipm.ip_addr == im4->multiaddr) && 1206 (memcmp(buf, &tmp->ipm.mac_addr, 1207 LCS_MAC_LENGTH) == 0) ) { 1208 ipm = tmp; 1209 break; 1210 } 1211 } 1212 spin_unlock_irqrestore(&card->ipm_lock, flags); 1213 return ipm; 1214 } 1215 1216 static inline void 1217 lcs_set_mc_addresses(struct lcs_card *card, struct in_device *in4_dev) 1218 { 1219 1220 struct ip_mc_list *im4; 1221 struct lcs_ipm_list *ipm; 1222 char buf[MAX_ADDR_LEN]; 1223 unsigned long flags; 1224 1225 LCS_DBF_TEXT(4, trace, "setmclst"); 1226 for (im4 = in4_dev->mc_list; im4; im4 = im4->next) { 1227 lcs_get_mac_for_ipm(im4->multiaddr, buf, card->dev); 1228 ipm = lcs_check_addr_entry(card, im4, buf); 1229 if (ipm != NULL) 1230 continue; /* Address already in list. */ 1231 ipm = (struct lcs_ipm_list *) 1232 kzalloc(sizeof(struct lcs_ipm_list), GFP_ATOMIC); 1233 if (ipm == NULL) { 1234 PRINT_INFO("Not enough memory to add " 1235 "new multicast entry!\n"); 1236 break; 1237 } 1238 memcpy(&ipm->ipm.mac_addr, buf, LCS_MAC_LENGTH); 1239 ipm->ipm.ip_addr = im4->multiaddr; 1240 ipm->ipm_state = LCS_IPM_STATE_SET_REQUIRED; 1241 spin_lock_irqsave(&card->ipm_lock, flags); 1242 LCS_DBF_HEX(2,trace,&ipm->ipm.ip_addr,4); 1243 list_add(&ipm->list, &card->ipm_list); 1244 spin_unlock_irqrestore(&card->ipm_lock, flags); 1245 } 1246 } 1247 1248 static int 1249 lcs_register_mc_addresses(void *data) 1250 { 1251 struct lcs_card *card; 1252 struct in_device *in4_dev; 1253 1254 card = (struct lcs_card *) data; 1255 daemonize("regipm"); 1256 1257 if (!lcs_do_run_thread(card, LCS_SET_MC_THREAD)) 1258 return 0; 1259 LCS_DBF_TEXT(4, trace, "regmulti"); 1260 1261 in4_dev = in_dev_get(card->dev); 1262 if (in4_dev == NULL) 1263 goto out; 1264 read_lock(&in4_dev->mc_list_lock); 1265 lcs_remove_mc_addresses(card,in4_dev); 1266 lcs_set_mc_addresses(card, in4_dev); 1267 read_unlock(&in4_dev->mc_list_lock); 1268 in_dev_put(in4_dev); 1269 1270 netif_carrier_off(card->dev); 1271 netif_tx_disable(card->dev); 1272 wait_event(card->write.wait_q, 1273 (card->write.state != LCS_CH_STATE_RUNNING)); 1274 lcs_fix_multicast_list(card); 1275 if (card->state == DEV_STATE_UP) { 1276 netif_carrier_on(card->dev); 1277 netif_wake_queue(card->dev); 1278 } 1279 out: 1280 lcs_clear_thread_running_bit(card, LCS_SET_MC_THREAD); 1281 return 0; 1282 } 1283 /** 1284 * function called by net device to 1285 * handle multicast address relevant things 1286 */ 1287 static void 1288 lcs_set_multicast_list(struct net_device *dev) 1289 { 1290 struct lcs_card *card; 1291 1292 LCS_DBF_TEXT(4, trace, "setmulti"); 1293 card = (struct lcs_card *) dev->priv; 1294 1295 if (!lcs_set_thread_start_bit(card, LCS_SET_MC_THREAD)) 1296 schedule_work(&card->kernel_thread_starter); 1297 } 1298 1299 #endif /* CONFIG_IP_MULTICAST */ 1300 1301 static long 1302 lcs_check_irb_error(struct ccw_device *cdev, struct irb *irb) 1303 { 1304 if (!IS_ERR(irb)) 1305 return 0; 1306 1307 switch (PTR_ERR(irb)) { 1308 case -EIO: 1309 PRINT_WARN("i/o-error on device %s\n", dev_name(&cdev->dev)); 1310 LCS_DBF_TEXT(2, trace, "ckirberr"); 1311 LCS_DBF_TEXT_(2, trace, " rc%d", -EIO); 1312 break; 1313 case -ETIMEDOUT: 1314 PRINT_WARN("timeout on device %s\n", dev_name(&cdev->dev)); 1315 LCS_DBF_TEXT(2, trace, "ckirberr"); 1316 LCS_DBF_TEXT_(2, trace, " rc%d", -ETIMEDOUT); 1317 break; 1318 default: 1319 PRINT_WARN("unknown error %ld on device %s\n", PTR_ERR(irb), 1320 dev_name(&cdev->dev)); 1321 LCS_DBF_TEXT(2, trace, "ckirberr"); 1322 LCS_DBF_TEXT(2, trace, " rc???"); 1323 } 1324 return PTR_ERR(irb); 1325 } 1326 1327 static int 1328 lcs_get_problem(struct ccw_device *cdev, struct irb *irb) 1329 { 1330 int dstat, cstat; 1331 char *sense; 1332 1333 sense = (char *) irb->ecw; 1334 cstat = irb->scsw.cmd.cstat; 1335 dstat = irb->scsw.cmd.dstat; 1336 1337 if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK | 1338 SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK | 1339 SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) { 1340 LCS_DBF_TEXT(2, trace, "CGENCHK"); 1341 return 1; 1342 } 1343 if (dstat & DEV_STAT_UNIT_CHECK) { 1344 if (sense[LCS_SENSE_BYTE_1] & 1345 LCS_SENSE_RESETTING_EVENT) { 1346 LCS_DBF_TEXT(2, trace, "REVIND"); 1347 return 1; 1348 } 1349 if (sense[LCS_SENSE_BYTE_0] & 1350 LCS_SENSE_CMD_REJECT) { 1351 LCS_DBF_TEXT(2, trace, "CMDREJ"); 1352 return 0; 1353 } 1354 if ((!sense[LCS_SENSE_BYTE_0]) && 1355 (!sense[LCS_SENSE_BYTE_1]) && 1356 (!sense[LCS_SENSE_BYTE_2]) && 1357 (!sense[LCS_SENSE_BYTE_3])) { 1358 LCS_DBF_TEXT(2, trace, "ZEROSEN"); 1359 return 0; 1360 } 1361 LCS_DBF_TEXT(2, trace, "DGENCHK"); 1362 return 1; 1363 } 1364 return 0; 1365 } 1366 1367 static void 1368 lcs_schedule_recovery(struct lcs_card *card) 1369 { 1370 LCS_DBF_TEXT(2, trace, "startrec"); 1371 if (!lcs_set_thread_start_bit(card, LCS_RECOVERY_THREAD)) 1372 schedule_work(&card->kernel_thread_starter); 1373 } 1374 1375 /** 1376 * IRQ Handler for LCS channels 1377 */ 1378 static void 1379 lcs_irq(struct ccw_device *cdev, unsigned long intparm, struct irb *irb) 1380 { 1381 struct lcs_card *card; 1382 struct lcs_channel *channel; 1383 int rc, index; 1384 int cstat, dstat; 1385 1386 if (lcs_check_irb_error(cdev, irb)) 1387 return; 1388 1389 card = CARD_FROM_DEV(cdev); 1390 if (card->read.ccwdev == cdev) 1391 channel = &card->read; 1392 else 1393 channel = &card->write; 1394 1395 cstat = irb->scsw.cmd.cstat; 1396 dstat = irb->scsw.cmd.dstat; 1397 LCS_DBF_TEXT_(5, trace, "Rint%s", dev_name(&cdev->dev)); 1398 LCS_DBF_TEXT_(5, trace, "%4x%4x", irb->scsw.cmd.cstat, 1399 irb->scsw.cmd.dstat); 1400 LCS_DBF_TEXT_(5, trace, "%4x%4x", irb->scsw.cmd.fctl, 1401 irb->scsw.cmd.actl); 1402 1403 /* Check for channel and device errors presented */ 1404 rc = lcs_get_problem(cdev, irb); 1405 if (rc || (dstat & DEV_STAT_UNIT_EXCEP)) { 1406 PRINT_WARN("check on device %s, dstat=0x%X, cstat=0x%X \n", 1407 dev_name(&cdev->dev), dstat, cstat); 1408 if (rc) { 1409 channel->state = LCS_CH_STATE_ERROR; 1410 } 1411 } 1412 if (channel->state == LCS_CH_STATE_ERROR) { 1413 lcs_schedule_recovery(card); 1414 wake_up(&card->wait_q); 1415 return; 1416 } 1417 /* How far in the ccw chain have we processed? */ 1418 if ((channel->state != LCS_CH_STATE_INIT) && 1419 (irb->scsw.cmd.fctl & SCSW_FCTL_START_FUNC) && 1420 (irb->scsw.cmd.cpa != 0)) { 1421 index = (struct ccw1 *) __va((addr_t) irb->scsw.cmd.cpa) 1422 - channel->ccws; 1423 if ((irb->scsw.cmd.actl & SCSW_ACTL_SUSPENDED) || 1424 (irb->scsw.cmd.cstat & SCHN_STAT_PCI)) 1425 /* Bloody io subsystem tells us lies about cpa... */ 1426 index = (index - 1) & (LCS_NUM_BUFFS - 1); 1427 while (channel->io_idx != index) { 1428 __lcs_processed_buffer(channel, 1429 channel->iob + channel->io_idx); 1430 channel->io_idx = 1431 (channel->io_idx + 1) & (LCS_NUM_BUFFS - 1); 1432 } 1433 } 1434 1435 if ((irb->scsw.cmd.dstat & DEV_STAT_DEV_END) || 1436 (irb->scsw.cmd.dstat & DEV_STAT_CHN_END) || 1437 (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK)) 1438 /* Mark channel as stopped. */ 1439 channel->state = LCS_CH_STATE_STOPPED; 1440 else if (irb->scsw.cmd.actl & SCSW_ACTL_SUSPENDED) 1441 /* CCW execution stopped on a suspend bit. */ 1442 channel->state = LCS_CH_STATE_SUSPENDED; 1443 if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) { 1444 if (irb->scsw.cmd.cc != 0) { 1445 ccw_device_halt(channel->ccwdev, (addr_t) channel); 1446 return; 1447 } 1448 /* The channel has been stopped by halt_IO. */ 1449 channel->state = LCS_CH_STATE_HALTED; 1450 } 1451 if (irb->scsw.cmd.fctl & SCSW_FCTL_CLEAR_FUNC) 1452 channel->state = LCS_CH_STATE_CLEARED; 1453 /* Do the rest in the tasklet. */ 1454 tasklet_schedule(&channel->irq_tasklet); 1455 } 1456 1457 /** 1458 * Tasklet for IRQ handler 1459 */ 1460 static void 1461 lcs_tasklet(unsigned long data) 1462 { 1463 unsigned long flags; 1464 struct lcs_channel *channel; 1465 struct lcs_buffer *iob; 1466 int buf_idx; 1467 int rc; 1468 1469 channel = (struct lcs_channel *) data; 1470 LCS_DBF_TEXT_(5, trace, "tlet%s", dev_name(&channel->ccwdev->dev)); 1471 1472 /* Check for processed buffers. */ 1473 iob = channel->iob; 1474 buf_idx = channel->buf_idx; 1475 while (iob[buf_idx].state == LCS_BUF_STATE_PROCESSED) { 1476 /* Do the callback thing. */ 1477 if (iob[buf_idx].callback != NULL) 1478 iob[buf_idx].callback(channel, iob + buf_idx); 1479 buf_idx = (buf_idx + 1) & (LCS_NUM_BUFFS - 1); 1480 } 1481 channel->buf_idx = buf_idx; 1482 1483 if (channel->state == LCS_CH_STATE_STOPPED) 1484 // FIXME: what if rc != 0 ?? 1485 rc = lcs_start_channel(channel); 1486 spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); 1487 if (channel->state == LCS_CH_STATE_SUSPENDED && 1488 channel->iob[channel->io_idx].state == LCS_BUF_STATE_READY) { 1489 // FIXME: what if rc != 0 ?? 1490 rc = __lcs_resume_channel(channel); 1491 } 1492 spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); 1493 1494 /* Something happened on the channel. Wake up waiters. */ 1495 wake_up(&channel->wait_q); 1496 } 1497 1498 /** 1499 * Finish current tx buffer and make it ready for transmit. 1500 */ 1501 static void 1502 __lcs_emit_txbuffer(struct lcs_card *card) 1503 { 1504 LCS_DBF_TEXT(5, trace, "emittx"); 1505 *(__u16 *)(card->tx_buffer->data + card->tx_buffer->count) = 0; 1506 card->tx_buffer->count += 2; 1507 lcs_ready_buffer(&card->write, card->tx_buffer); 1508 card->tx_buffer = NULL; 1509 card->tx_emitted++; 1510 } 1511 1512 /** 1513 * Callback for finished tx buffers. 1514 */ 1515 static void 1516 lcs_txbuffer_cb(struct lcs_channel *channel, struct lcs_buffer *buffer) 1517 { 1518 struct lcs_card *card; 1519 1520 LCS_DBF_TEXT(5, trace, "txbuffcb"); 1521 /* Put buffer back to pool. */ 1522 lcs_release_buffer(channel, buffer); 1523 card = container_of(channel, struct lcs_card, write); 1524 if (netif_queue_stopped(card->dev) && netif_carrier_ok(card->dev)) 1525 netif_wake_queue(card->dev); 1526 spin_lock(&card->lock); 1527 card->tx_emitted--; 1528 if (card->tx_emitted <= 0 && card->tx_buffer != NULL) 1529 /* 1530 * Last running tx buffer has finished. Submit partially 1531 * filled current buffer. 1532 */ 1533 __lcs_emit_txbuffer(card); 1534 spin_unlock(&card->lock); 1535 } 1536 1537 /** 1538 * Packet transmit function called by network stack 1539 */ 1540 static int 1541 __lcs_start_xmit(struct lcs_card *card, struct sk_buff *skb, 1542 struct net_device *dev) 1543 { 1544 struct lcs_header *header; 1545 int rc = 0; 1546 1547 LCS_DBF_TEXT(5, trace, "hardxmit"); 1548 if (skb == NULL) { 1549 card->stats.tx_dropped++; 1550 card->stats.tx_errors++; 1551 return -EIO; 1552 } 1553 if (card->state != DEV_STATE_UP) { 1554 dev_kfree_skb(skb); 1555 card->stats.tx_dropped++; 1556 card->stats.tx_errors++; 1557 card->stats.tx_carrier_errors++; 1558 return 0; 1559 } 1560 if (skb->protocol == htons(ETH_P_IPV6)) { 1561 dev_kfree_skb(skb); 1562 return 0; 1563 } 1564 netif_stop_queue(card->dev); 1565 spin_lock(&card->lock); 1566 if (card->tx_buffer != NULL && 1567 card->tx_buffer->count + sizeof(struct lcs_header) + 1568 skb->len + sizeof(u16) > LCS_IOBUFFERSIZE) 1569 /* skb too big for current tx buffer. */ 1570 __lcs_emit_txbuffer(card); 1571 if (card->tx_buffer == NULL) { 1572 /* Get new tx buffer */ 1573 card->tx_buffer = lcs_get_buffer(&card->write); 1574 if (card->tx_buffer == NULL) { 1575 card->stats.tx_dropped++; 1576 rc = -EBUSY; 1577 goto out; 1578 } 1579 card->tx_buffer->callback = lcs_txbuffer_cb; 1580 card->tx_buffer->count = 0; 1581 } 1582 header = (struct lcs_header *) 1583 (card->tx_buffer->data + card->tx_buffer->count); 1584 card->tx_buffer->count += skb->len + sizeof(struct lcs_header); 1585 header->offset = card->tx_buffer->count; 1586 header->type = card->lan_type; 1587 header->slot = card->portno; 1588 skb_copy_from_linear_data(skb, header + 1, skb->len); 1589 spin_unlock(&card->lock); 1590 card->stats.tx_bytes += skb->len; 1591 card->stats.tx_packets++; 1592 dev_kfree_skb(skb); 1593 netif_wake_queue(card->dev); 1594 spin_lock(&card->lock); 1595 if (card->tx_emitted <= 0 && card->tx_buffer != NULL) 1596 /* If this is the first tx buffer emit it immediately. */ 1597 __lcs_emit_txbuffer(card); 1598 out: 1599 spin_unlock(&card->lock); 1600 return rc; 1601 } 1602 1603 static int 1604 lcs_start_xmit(struct sk_buff *skb, struct net_device *dev) 1605 { 1606 struct lcs_card *card; 1607 int rc; 1608 1609 LCS_DBF_TEXT(5, trace, "pktxmit"); 1610 card = (struct lcs_card *) dev->priv; 1611 rc = __lcs_start_xmit(card, skb, dev); 1612 return rc; 1613 } 1614 1615 /** 1616 * send startlan and lanstat command to make LCS device ready 1617 */ 1618 static int 1619 lcs_startlan_auto(struct lcs_card *card) 1620 { 1621 int rc; 1622 1623 LCS_DBF_TEXT(2, trace, "strtauto"); 1624 #ifdef CONFIG_NET_ETHERNET 1625 card->lan_type = LCS_FRAME_TYPE_ENET; 1626 rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP); 1627 if (rc == 0) 1628 return 0; 1629 1630 #endif 1631 #ifdef CONFIG_TR 1632 card->lan_type = LCS_FRAME_TYPE_TR; 1633 rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP); 1634 if (rc == 0) 1635 return 0; 1636 #endif 1637 #ifdef CONFIG_FDDI 1638 card->lan_type = LCS_FRAME_TYPE_FDDI; 1639 rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP); 1640 if (rc == 0) 1641 return 0; 1642 #endif 1643 return -EIO; 1644 } 1645 1646 static int 1647 lcs_startlan(struct lcs_card *card) 1648 { 1649 int rc, i; 1650 1651 LCS_DBF_TEXT(2, trace, "startlan"); 1652 rc = 0; 1653 if (card->portno != LCS_INVALID_PORT_NO) { 1654 if (card->lan_type == LCS_FRAME_TYPE_AUTO) 1655 rc = lcs_startlan_auto(card); 1656 else 1657 rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP); 1658 } else { 1659 for (i = 0; i <= 16; i++) { 1660 card->portno = i; 1661 if (card->lan_type != LCS_FRAME_TYPE_AUTO) 1662 rc = lcs_send_startlan(card, 1663 LCS_INITIATOR_TCPIP); 1664 else 1665 /* autodetecting lan type */ 1666 rc = lcs_startlan_auto(card); 1667 if (rc == 0) 1668 break; 1669 } 1670 } 1671 if (rc == 0) 1672 return lcs_send_lanstat(card); 1673 return rc; 1674 } 1675 1676 /** 1677 * LCS detect function 1678 * setup channels and make them I/O ready 1679 */ 1680 static int 1681 lcs_detect(struct lcs_card *card) 1682 { 1683 int rc = 0; 1684 1685 LCS_DBF_TEXT(2, setup, "lcsdetct"); 1686 /* start/reset card */ 1687 if (card->dev) 1688 netif_stop_queue(card->dev); 1689 rc = lcs_stop_channels(card); 1690 if (rc == 0) { 1691 rc = lcs_start_channels(card); 1692 if (rc == 0) { 1693 rc = lcs_send_startup(card, LCS_INITIATOR_TCPIP); 1694 if (rc == 0) 1695 rc = lcs_startlan(card); 1696 } 1697 } 1698 if (rc == 0) { 1699 card->state = DEV_STATE_UP; 1700 } else { 1701 card->state = DEV_STATE_DOWN; 1702 card->write.state = LCS_CH_STATE_INIT; 1703 card->read.state = LCS_CH_STATE_INIT; 1704 } 1705 return rc; 1706 } 1707 1708 /** 1709 * LCS Stop card 1710 */ 1711 static int 1712 lcs_stopcard(struct lcs_card *card) 1713 { 1714 int rc; 1715 1716 LCS_DBF_TEXT(3, setup, "stopcard"); 1717 1718 if (card->read.state != LCS_CH_STATE_STOPPED && 1719 card->write.state != LCS_CH_STATE_STOPPED && 1720 card->read.state != LCS_CH_STATE_ERROR && 1721 card->write.state != LCS_CH_STATE_ERROR && 1722 card->state == DEV_STATE_UP) { 1723 lcs_clear_multicast_list(card); 1724 rc = lcs_send_stoplan(card,LCS_INITIATOR_TCPIP); 1725 rc = lcs_send_shutdown(card); 1726 } 1727 rc = lcs_stop_channels(card); 1728 card->state = DEV_STATE_DOWN; 1729 1730 return rc; 1731 } 1732 1733 /** 1734 * Kernel Thread helper functions for LGW initiated commands 1735 */ 1736 static void 1737 lcs_start_kernel_thread(struct work_struct *work) 1738 { 1739 struct lcs_card *card = container_of(work, struct lcs_card, kernel_thread_starter); 1740 LCS_DBF_TEXT(5, trace, "krnthrd"); 1741 if (lcs_do_start_thread(card, LCS_RECOVERY_THREAD)) 1742 kernel_thread(lcs_recovery, (void *) card, SIGCHLD); 1743 #ifdef CONFIG_IP_MULTICAST 1744 if (lcs_do_start_thread(card, LCS_SET_MC_THREAD)) 1745 kernel_thread(lcs_register_mc_addresses, 1746 (void *) card, SIGCHLD); 1747 #endif 1748 } 1749 1750 /** 1751 * Process control frames. 1752 */ 1753 static void 1754 lcs_get_control(struct lcs_card *card, struct lcs_cmd *cmd) 1755 { 1756 LCS_DBF_TEXT(5, trace, "getctrl"); 1757 if (cmd->initiator == LCS_INITIATOR_LGW) { 1758 switch(cmd->cmd_code) { 1759 case LCS_CMD_STARTUP: 1760 case LCS_CMD_STARTLAN: 1761 lcs_schedule_recovery(card); 1762 break; 1763 case LCS_CMD_STOPLAN: 1764 PRINT_WARN("Stoplan for %s initiated by LGW.\n", 1765 card->dev->name); 1766 if (card->dev) 1767 netif_carrier_off(card->dev); 1768 break; 1769 default: 1770 LCS_DBF_TEXT(5, trace, "noLGWcmd"); 1771 break; 1772 } 1773 } else 1774 lcs_notify_lancmd_waiters(card, cmd); 1775 } 1776 1777 /** 1778 * Unpack network packet. 1779 */ 1780 static void 1781 lcs_get_skb(struct lcs_card *card, char *skb_data, unsigned int skb_len) 1782 { 1783 struct sk_buff *skb; 1784 1785 LCS_DBF_TEXT(5, trace, "getskb"); 1786 if (card->dev == NULL || 1787 card->state != DEV_STATE_UP) 1788 /* The card isn't up. Ignore the packet. */ 1789 return; 1790 1791 skb = dev_alloc_skb(skb_len); 1792 if (skb == NULL) { 1793 PRINT_ERR("LCS: alloc_skb failed for device=%s\n", 1794 card->dev->name); 1795 card->stats.rx_dropped++; 1796 return; 1797 } 1798 memcpy(skb_put(skb, skb_len), skb_data, skb_len); 1799 skb->protocol = card->lan_type_trans(skb, card->dev); 1800 card->stats.rx_bytes += skb_len; 1801 card->stats.rx_packets++; 1802 if (skb->protocol == htons(ETH_P_802_2)) 1803 *((__u32 *)skb->cb) = ++card->pkt_seq; 1804 netif_rx(skb); 1805 } 1806 1807 /** 1808 * LCS main routine to get packets and lancmd replies from the buffers 1809 */ 1810 static void 1811 lcs_get_frames_cb(struct lcs_channel *channel, struct lcs_buffer *buffer) 1812 { 1813 struct lcs_card *card; 1814 struct lcs_header *lcs_hdr; 1815 __u16 offset; 1816 1817 LCS_DBF_TEXT(5, trace, "lcsgtpkt"); 1818 lcs_hdr = (struct lcs_header *) buffer->data; 1819 if (lcs_hdr->offset == LCS_ILLEGAL_OFFSET) { 1820 LCS_DBF_TEXT(4, trace, "-eiogpkt"); 1821 return; 1822 } 1823 card = container_of(channel, struct lcs_card, read); 1824 offset = 0; 1825 while (lcs_hdr->offset != 0) { 1826 if (lcs_hdr->offset <= 0 || 1827 lcs_hdr->offset > LCS_IOBUFFERSIZE || 1828 lcs_hdr->offset < offset) { 1829 /* Offset invalid. */ 1830 card->stats.rx_length_errors++; 1831 card->stats.rx_errors++; 1832 return; 1833 } 1834 /* What kind of frame is it? */ 1835 if (lcs_hdr->type == LCS_FRAME_TYPE_CONTROL) 1836 /* Control frame. */ 1837 lcs_get_control(card, (struct lcs_cmd *) lcs_hdr); 1838 else if (lcs_hdr->type == LCS_FRAME_TYPE_ENET || 1839 lcs_hdr->type == LCS_FRAME_TYPE_TR || 1840 lcs_hdr->type == LCS_FRAME_TYPE_FDDI) 1841 /* Normal network packet. */ 1842 lcs_get_skb(card, (char *)(lcs_hdr + 1), 1843 lcs_hdr->offset - offset - 1844 sizeof(struct lcs_header)); 1845 else 1846 /* Unknown frame type. */ 1847 ; // FIXME: error message ? 1848 /* Proceed to next frame. */ 1849 offset = lcs_hdr->offset; 1850 lcs_hdr->offset = LCS_ILLEGAL_OFFSET; 1851 lcs_hdr = (struct lcs_header *) (buffer->data + offset); 1852 } 1853 /* The buffer is now empty. Make it ready again. */ 1854 lcs_ready_buffer(&card->read, buffer); 1855 } 1856 1857 /** 1858 * get network statistics for ifconfig and other user programs 1859 */ 1860 static struct net_device_stats * 1861 lcs_getstats(struct net_device *dev) 1862 { 1863 struct lcs_card *card; 1864 1865 LCS_DBF_TEXT(4, trace, "netstats"); 1866 card = (struct lcs_card *) dev->priv; 1867 return &card->stats; 1868 } 1869 1870 /** 1871 * stop lcs device 1872 * This function will be called by user doing ifconfig xxx down 1873 */ 1874 static int 1875 lcs_stop_device(struct net_device *dev) 1876 { 1877 struct lcs_card *card; 1878 int rc; 1879 1880 LCS_DBF_TEXT(2, trace, "stopdev"); 1881 card = (struct lcs_card *) dev->priv; 1882 netif_carrier_off(dev); 1883 netif_tx_disable(dev); 1884 dev->flags &= ~IFF_UP; 1885 wait_event(card->write.wait_q, 1886 (card->write.state != LCS_CH_STATE_RUNNING)); 1887 rc = lcs_stopcard(card); 1888 if (rc) 1889 PRINT_ERR("Try it again!\n "); 1890 return rc; 1891 } 1892 1893 /** 1894 * start lcs device and make it runnable 1895 * This function will be called by user doing ifconfig xxx up 1896 */ 1897 static int 1898 lcs_open_device(struct net_device *dev) 1899 { 1900 struct lcs_card *card; 1901 int rc; 1902 1903 LCS_DBF_TEXT(2, trace, "opendev"); 1904 card = (struct lcs_card *) dev->priv; 1905 /* initialize statistics */ 1906 rc = lcs_detect(card); 1907 if (rc) { 1908 PRINT_ERR("LCS:Error in opening device!\n"); 1909 1910 } else { 1911 dev->flags |= IFF_UP; 1912 netif_carrier_on(dev); 1913 netif_wake_queue(dev); 1914 card->state = DEV_STATE_UP; 1915 } 1916 return rc; 1917 } 1918 1919 /** 1920 * show function for portno called by cat or similar things 1921 */ 1922 static ssize_t 1923 lcs_portno_show (struct device *dev, struct device_attribute *attr, char *buf) 1924 { 1925 struct lcs_card *card; 1926 1927 card = (struct lcs_card *)dev->driver_data; 1928 1929 if (!card) 1930 return 0; 1931 1932 return sprintf(buf, "%d\n", card->portno); 1933 } 1934 1935 /** 1936 * store the value which is piped to file portno 1937 */ 1938 static ssize_t 1939 lcs_portno_store (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 1940 { 1941 struct lcs_card *card; 1942 int value; 1943 1944 card = (struct lcs_card *)dev->driver_data; 1945 1946 if (!card) 1947 return 0; 1948 1949 sscanf(buf, "%u", &value); 1950 /* TODO: sanity checks */ 1951 card->portno = value; 1952 1953 return count; 1954 1955 } 1956 1957 static DEVICE_ATTR(portno, 0644, lcs_portno_show, lcs_portno_store); 1958 1959 static ssize_t 1960 lcs_type_show(struct device *dev, struct device_attribute *attr, char *buf) 1961 { 1962 struct ccwgroup_device *cgdev; 1963 1964 cgdev = to_ccwgroupdev(dev); 1965 if (!cgdev) 1966 return -ENODEV; 1967 1968 return sprintf(buf, "%s\n", cu3088_type[cgdev->cdev[0]->id.driver_info]); 1969 } 1970 1971 static DEVICE_ATTR(type, 0444, lcs_type_show, NULL); 1972 1973 static ssize_t 1974 lcs_timeout_show(struct device *dev, struct device_attribute *attr, char *buf) 1975 { 1976 struct lcs_card *card; 1977 1978 card = (struct lcs_card *)dev->driver_data; 1979 1980 return card ? sprintf(buf, "%u\n", card->lancmd_timeout) : 0; 1981 } 1982 1983 static ssize_t 1984 lcs_timeout_store (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 1985 { 1986 struct lcs_card *card; 1987 int value; 1988 1989 card = (struct lcs_card *)dev->driver_data; 1990 1991 if (!card) 1992 return 0; 1993 1994 sscanf(buf, "%u", &value); 1995 /* TODO: sanity checks */ 1996 card->lancmd_timeout = value; 1997 1998 return count; 1999 2000 } 2001 2002 static DEVICE_ATTR(lancmd_timeout, 0644, lcs_timeout_show, lcs_timeout_store); 2003 2004 static ssize_t 2005 lcs_dev_recover_store(struct device *dev, struct device_attribute *attr, 2006 const char *buf, size_t count) 2007 { 2008 struct lcs_card *card = dev->driver_data; 2009 char *tmp; 2010 int i; 2011 2012 if (!card) 2013 return -EINVAL; 2014 if (card->state != DEV_STATE_UP) 2015 return -EPERM; 2016 i = simple_strtoul(buf, &tmp, 16); 2017 if (i == 1) 2018 lcs_schedule_recovery(card); 2019 return count; 2020 } 2021 2022 static DEVICE_ATTR(recover, 0200, NULL, lcs_dev_recover_store); 2023 2024 static struct attribute * lcs_attrs[] = { 2025 &dev_attr_portno.attr, 2026 &dev_attr_type.attr, 2027 &dev_attr_lancmd_timeout.attr, 2028 &dev_attr_recover.attr, 2029 NULL, 2030 }; 2031 2032 static struct attribute_group lcs_attr_group = { 2033 .attrs = lcs_attrs, 2034 }; 2035 2036 /** 2037 * lcs_probe_device is called on establishing a new ccwgroup_device. 2038 */ 2039 static int 2040 lcs_probe_device(struct ccwgroup_device *ccwgdev) 2041 { 2042 struct lcs_card *card; 2043 int ret; 2044 2045 if (!get_device(&ccwgdev->dev)) 2046 return -ENODEV; 2047 2048 LCS_DBF_TEXT(2, setup, "add_dev"); 2049 card = lcs_alloc_card(); 2050 if (!card) { 2051 LCS_DBF_TEXT_(2, setup, " rc%d", -ENOMEM); 2052 put_device(&ccwgdev->dev); 2053 return -ENOMEM; 2054 } 2055 ret = sysfs_create_group(&ccwgdev->dev.kobj, &lcs_attr_group); 2056 if (ret) { 2057 lcs_free_card(card); 2058 put_device(&ccwgdev->dev); 2059 return ret; 2060 } 2061 ccwgdev->dev.driver_data = card; 2062 ccwgdev->cdev[0]->handler = lcs_irq; 2063 ccwgdev->cdev[1]->handler = lcs_irq; 2064 card->gdev = ccwgdev; 2065 INIT_WORK(&card->kernel_thread_starter, lcs_start_kernel_thread); 2066 card->thread_start_mask = 0; 2067 card->thread_allowed_mask = 0; 2068 card->thread_running_mask = 0; 2069 return 0; 2070 } 2071 2072 static int 2073 lcs_register_netdev(struct ccwgroup_device *ccwgdev) 2074 { 2075 struct lcs_card *card; 2076 2077 LCS_DBF_TEXT(2, setup, "regnetdv"); 2078 card = (struct lcs_card *)ccwgdev->dev.driver_data; 2079 if (card->dev->reg_state != NETREG_UNINITIALIZED) 2080 return 0; 2081 SET_NETDEV_DEV(card->dev, &ccwgdev->dev); 2082 return register_netdev(card->dev); 2083 } 2084 2085 /** 2086 * lcs_new_device will be called by setting the group device online. 2087 */ 2088 2089 static int 2090 lcs_new_device(struct ccwgroup_device *ccwgdev) 2091 { 2092 struct lcs_card *card; 2093 struct net_device *dev=NULL; 2094 enum lcs_dev_states recover_state; 2095 int rc; 2096 2097 card = (struct lcs_card *)ccwgdev->dev.driver_data; 2098 if (!card) 2099 return -ENODEV; 2100 2101 LCS_DBF_TEXT(2, setup, "newdev"); 2102 LCS_DBF_HEX(3, setup, &card, sizeof(void*)); 2103 card->read.ccwdev = ccwgdev->cdev[0]; 2104 card->write.ccwdev = ccwgdev->cdev[1]; 2105 2106 recover_state = card->state; 2107 ccw_device_set_online(card->read.ccwdev); 2108 ccw_device_set_online(card->write.ccwdev); 2109 2110 LCS_DBF_TEXT(3, setup, "lcsnewdv"); 2111 2112 lcs_setup_card(card); 2113 rc = lcs_detect(card); 2114 if (rc) { 2115 LCS_DBF_TEXT(2, setup, "dtctfail"); 2116 PRINT_WARN("Detection of LCS card failed with return code " 2117 "%d (0x%x)\n", rc, rc); 2118 lcs_stopcard(card); 2119 goto out; 2120 } 2121 if (card->dev) { 2122 LCS_DBF_TEXT(2, setup, "samedev"); 2123 LCS_DBF_HEX(3, setup, &card, sizeof(void*)); 2124 goto netdev_out; 2125 } 2126 switch (card->lan_type) { 2127 #ifdef CONFIG_NET_ETHERNET 2128 case LCS_FRAME_TYPE_ENET: 2129 card->lan_type_trans = eth_type_trans; 2130 dev = alloc_etherdev(0); 2131 break; 2132 #endif 2133 #ifdef CONFIG_TR 2134 case LCS_FRAME_TYPE_TR: 2135 card->lan_type_trans = tr_type_trans; 2136 dev = alloc_trdev(0); 2137 break; 2138 #endif 2139 #ifdef CONFIG_FDDI 2140 case LCS_FRAME_TYPE_FDDI: 2141 card->lan_type_trans = fddi_type_trans; 2142 dev = alloc_fddidev(0); 2143 break; 2144 #endif 2145 default: 2146 LCS_DBF_TEXT(3, setup, "errinit"); 2147 PRINT_ERR("LCS: Initialization failed\n"); 2148 goto out; 2149 } 2150 if (!dev) 2151 goto out; 2152 card->dev = dev; 2153 card->dev->priv = card; 2154 card->dev->open = lcs_open_device; 2155 card->dev->stop = lcs_stop_device; 2156 card->dev->hard_start_xmit = lcs_start_xmit; 2157 card->dev->get_stats = lcs_getstats; 2158 memcpy(card->dev->dev_addr, card->mac, LCS_MAC_LENGTH); 2159 #ifdef CONFIG_IP_MULTICAST 2160 if (!lcs_check_multicast_support(card)) 2161 card->dev->set_multicast_list = lcs_set_multicast_list; 2162 #endif 2163 netdev_out: 2164 lcs_set_allowed_threads(card,0xffffffff); 2165 if (recover_state == DEV_STATE_RECOVER) { 2166 lcs_set_multicast_list(card->dev); 2167 card->dev->flags |= IFF_UP; 2168 netif_carrier_on(card->dev); 2169 netif_wake_queue(card->dev); 2170 card->state = DEV_STATE_UP; 2171 } else { 2172 lcs_stopcard(card); 2173 } 2174 2175 if (lcs_register_netdev(ccwgdev) != 0) 2176 goto out; 2177 2178 /* Print out supported assists: IPv6 */ 2179 PRINT_INFO("LCS device %s %s IPv6 support\n", card->dev->name, 2180 (card->ip_assists_supported & LCS_IPASS_IPV6_SUPPORT) ? 2181 "with" : "without"); 2182 /* Print out supported assist: Multicast */ 2183 PRINT_INFO("LCS device %s %s Multicast support\n", card->dev->name, 2184 (card->ip_assists_supported & LCS_IPASS_MULTICAST_SUPPORT) ? 2185 "with" : "without"); 2186 return 0; 2187 out: 2188 2189 ccw_device_set_offline(card->read.ccwdev); 2190 ccw_device_set_offline(card->write.ccwdev); 2191 return -ENODEV; 2192 } 2193 2194 /** 2195 * lcs_shutdown_device, called when setting the group device offline. 2196 */ 2197 static int 2198 __lcs_shutdown_device(struct ccwgroup_device *ccwgdev, int recovery_mode) 2199 { 2200 struct lcs_card *card; 2201 enum lcs_dev_states recover_state; 2202 int ret; 2203 2204 LCS_DBF_TEXT(3, setup, "shtdndev"); 2205 card = (struct lcs_card *)ccwgdev->dev.driver_data; 2206 if (!card) 2207 return -ENODEV; 2208 if (recovery_mode == 0) { 2209 lcs_set_allowed_threads(card, 0); 2210 if (lcs_wait_for_threads(card, LCS_SET_MC_THREAD)) 2211 return -ERESTARTSYS; 2212 } 2213 LCS_DBF_HEX(3, setup, &card, sizeof(void*)); 2214 recover_state = card->state; 2215 2216 ret = lcs_stop_device(card->dev); 2217 ret = ccw_device_set_offline(card->read.ccwdev); 2218 ret = ccw_device_set_offline(card->write.ccwdev); 2219 if (recover_state == DEV_STATE_UP) { 2220 card->state = DEV_STATE_RECOVER; 2221 } 2222 if (ret) 2223 return ret; 2224 return 0; 2225 } 2226 2227 static int 2228 lcs_shutdown_device(struct ccwgroup_device *ccwgdev) 2229 { 2230 return __lcs_shutdown_device(ccwgdev, 0); 2231 } 2232 2233 /** 2234 * drive lcs recovery after startup and startlan initiated by Lan Gateway 2235 */ 2236 static int 2237 lcs_recovery(void *ptr) 2238 { 2239 struct lcs_card *card; 2240 struct ccwgroup_device *gdev; 2241 int rc; 2242 2243 card = (struct lcs_card *) ptr; 2244 daemonize("lcs_recover"); 2245 2246 LCS_DBF_TEXT(4, trace, "recover1"); 2247 if (!lcs_do_run_thread(card, LCS_RECOVERY_THREAD)) 2248 return 0; 2249 LCS_DBF_TEXT(4, trace, "recover2"); 2250 gdev = card->gdev; 2251 PRINT_WARN("Recovery of device %s started...\n", dev_name(&gdev->dev)); 2252 rc = __lcs_shutdown_device(gdev, 1); 2253 rc = lcs_new_device(gdev); 2254 if (!rc) 2255 PRINT_INFO("Device %s successfully recovered!\n", 2256 card->dev->name); 2257 else 2258 PRINT_INFO("Device %s could not be recovered!\n", 2259 card->dev->name); 2260 lcs_clear_thread_running_bit(card, LCS_RECOVERY_THREAD); 2261 return 0; 2262 } 2263 2264 /** 2265 * lcs_remove_device, free buffers and card 2266 */ 2267 static void 2268 lcs_remove_device(struct ccwgroup_device *ccwgdev) 2269 { 2270 struct lcs_card *card; 2271 2272 card = (struct lcs_card *)ccwgdev->dev.driver_data; 2273 if (!card) 2274 return; 2275 2276 LCS_DBF_TEXT(3, setup, "remdev"); 2277 LCS_DBF_HEX(3, setup, &card, sizeof(void*)); 2278 if (ccwgdev->state == CCWGROUP_ONLINE) { 2279 lcs_shutdown_device(ccwgdev); 2280 } 2281 if (card->dev) 2282 unregister_netdev(card->dev); 2283 sysfs_remove_group(&ccwgdev->dev.kobj, &lcs_attr_group); 2284 lcs_cleanup_card(card); 2285 lcs_free_card(card); 2286 put_device(&ccwgdev->dev); 2287 } 2288 2289 /** 2290 * LCS ccwgroup driver registration 2291 */ 2292 static struct ccwgroup_driver lcs_group_driver = { 2293 .owner = THIS_MODULE, 2294 .name = "lcs", 2295 .max_slaves = 2, 2296 .driver_id = 0xD3C3E2, 2297 .probe = lcs_probe_device, 2298 .remove = lcs_remove_device, 2299 .set_online = lcs_new_device, 2300 .set_offline = lcs_shutdown_device, 2301 }; 2302 2303 /** 2304 * LCS Module/Kernel initialization function 2305 */ 2306 static int 2307 __init lcs_init_module(void) 2308 { 2309 int rc; 2310 2311 PRINT_INFO("Loading %s\n",version); 2312 rc = lcs_register_debug_facility(); 2313 LCS_DBF_TEXT(0, setup, "lcsinit"); 2314 if (rc) { 2315 PRINT_ERR("Initialization failed\n"); 2316 return rc; 2317 } 2318 2319 rc = register_cu3088_discipline(&lcs_group_driver); 2320 if (rc) { 2321 PRINT_ERR("Initialization failed\n"); 2322 return rc; 2323 } 2324 return 0; 2325 } 2326 2327 2328 /** 2329 * LCS module cleanup function 2330 */ 2331 static void 2332 __exit lcs_cleanup_module(void) 2333 { 2334 PRINT_INFO("Terminating lcs module.\n"); 2335 LCS_DBF_TEXT(0, trace, "cleanup"); 2336 unregister_cu3088_discipline(&lcs_group_driver); 2337 lcs_unregister_debug_facility(); 2338 } 2339 2340 module_init(lcs_init_module); 2341 module_exit(lcs_cleanup_module); 2342 2343 MODULE_AUTHOR("Frank Pavlic <fpavlic@de.ibm.com>"); 2344 MODULE_LICENSE("GPL"); 2345 2346