1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright IBM Corp. 2007, 2009 4 * Author(s): Utz Bacher <utz.bacher@de.ibm.com>, 5 * Frank Pavlic <fpavlic@de.ibm.com>, 6 * Thomas Spatzier <tspat@de.ibm.com>, 7 * Frank Blaschka <frank.blaschka@de.ibm.com> 8 */ 9 10 #define KMSG_COMPONENT "qeth" 11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt 12 13 #include <linux/compat.h> 14 #include <linux/module.h> 15 #include <linux/moduleparam.h> 16 #include <linux/string.h> 17 #include <linux/errno.h> 18 #include <linux/kernel.h> 19 #include <linux/log2.h> 20 #include <linux/io.h> 21 #include <linux/ip.h> 22 #include <linux/tcp.h> 23 #include <linux/mii.h> 24 #include <linux/mm.h> 25 #include <linux/kthread.h> 26 #include <linux/slab.h> 27 #include <linux/if_vlan.h> 28 #include <linux/netdevice.h> 29 #include <linux/netdev_features.h> 30 #include <linux/rcutree.h> 31 #include <linux/skbuff.h> 32 #include <linux/vmalloc.h> 33 34 #include <net/iucv/af_iucv.h> 35 #include <net/dsfield.h> 36 #include <net/sock.h> 37 38 #include <asm/ebcdic.h> 39 #include <asm/chpid.h> 40 #include <asm/sysinfo.h> 41 #include <asm/diag.h> 42 #include <asm/cio.h> 43 #include <asm/ccwdev.h> 44 #include <asm/cpcmd.h> 45 46 #include "qeth_core.h" 47 48 struct qeth_dbf_info qeth_dbf[QETH_DBF_INFOS] = { 49 /* define dbf - Name, Pages, Areas, Maxlen, Level, View, Handle */ 50 /* N P A M L V H */ 51 [QETH_DBF_SETUP] = {"qeth_setup", 52 8, 1, 8, 5, &debug_hex_ascii_view, NULL}, 53 [QETH_DBF_MSG] = {"qeth_msg", 8, 1, 11 * sizeof(long), 3, 54 &debug_sprintf_view, NULL}, 55 [QETH_DBF_CTRL] = {"qeth_control", 56 8, 1, QETH_DBF_CTRL_LEN, 5, &debug_hex_ascii_view, NULL}, 57 }; 58 EXPORT_SYMBOL_GPL(qeth_dbf); 59 60 struct kmem_cache *qeth_core_header_cache; 61 EXPORT_SYMBOL_GPL(qeth_core_header_cache); 62 static struct kmem_cache *qeth_qdio_outbuf_cache; 63 64 static struct device *qeth_core_root_dev; 65 static struct dentry *qeth_debugfs_root; 66 static struct lock_class_key qdio_out_skb_queue_key; 67 68 static void qeth_issue_next_read_cb(struct qeth_card *card, 69 struct qeth_cmd_buffer *iob, 70 unsigned int data_length); 71 static int qeth_qdio_establish(struct qeth_card *); 72 static void qeth_free_qdio_queues(struct qeth_card *card); 73 static void qeth_notify_skbs(struct qeth_qdio_out_q *queue, 74 struct qeth_qdio_out_buffer *buf, 75 enum iucv_tx_notify notification); 76 static void qeth_tx_complete_buf(struct qeth_qdio_out_buffer *buf, bool error, 77 int budget); 78 79 static void qeth_close_dev_handler(struct work_struct *work) 80 { 81 struct qeth_card *card; 82 83 card = container_of(work, struct qeth_card, close_dev_work); 84 QETH_CARD_TEXT(card, 2, "cldevhdl"); 85 ccwgroup_set_offline(card->gdev); 86 } 87 88 static const char *qeth_get_cardname(struct qeth_card *card) 89 { 90 if (IS_VM_NIC(card)) { 91 switch (card->info.type) { 92 case QETH_CARD_TYPE_OSD: 93 return " Virtual NIC QDIO"; 94 case QETH_CARD_TYPE_IQD: 95 return " Virtual NIC Hiper"; 96 case QETH_CARD_TYPE_OSM: 97 return " Virtual NIC QDIO - OSM"; 98 case QETH_CARD_TYPE_OSX: 99 return " Virtual NIC QDIO - OSX"; 100 default: 101 return " unknown"; 102 } 103 } else { 104 switch (card->info.type) { 105 case QETH_CARD_TYPE_OSD: 106 return " OSD Express"; 107 case QETH_CARD_TYPE_IQD: 108 return " HiperSockets"; 109 case QETH_CARD_TYPE_OSN: 110 return " OSN QDIO"; 111 case QETH_CARD_TYPE_OSM: 112 return " OSM QDIO"; 113 case QETH_CARD_TYPE_OSX: 114 return " OSX QDIO"; 115 default: 116 return " unknown"; 117 } 118 } 119 return " n/a"; 120 } 121 122 /* max length to be returned: 14 */ 123 const char *qeth_get_cardname_short(struct qeth_card *card) 124 { 125 if (IS_VM_NIC(card)) { 126 switch (card->info.type) { 127 case QETH_CARD_TYPE_OSD: 128 return "Virt.NIC QDIO"; 129 case QETH_CARD_TYPE_IQD: 130 return "Virt.NIC Hiper"; 131 case QETH_CARD_TYPE_OSM: 132 return "Virt.NIC OSM"; 133 case QETH_CARD_TYPE_OSX: 134 return "Virt.NIC OSX"; 135 default: 136 return "unknown"; 137 } 138 } else { 139 switch (card->info.type) { 140 case QETH_CARD_TYPE_OSD: 141 switch (card->info.link_type) { 142 case QETH_LINK_TYPE_FAST_ETH: 143 return "OSD_100"; 144 case QETH_LINK_TYPE_HSTR: 145 return "HSTR"; 146 case QETH_LINK_TYPE_GBIT_ETH: 147 return "OSD_1000"; 148 case QETH_LINK_TYPE_10GBIT_ETH: 149 return "OSD_10GIG"; 150 case QETH_LINK_TYPE_25GBIT_ETH: 151 return "OSD_25GIG"; 152 case QETH_LINK_TYPE_LANE_ETH100: 153 return "OSD_FE_LANE"; 154 case QETH_LINK_TYPE_LANE_TR: 155 return "OSD_TR_LANE"; 156 case QETH_LINK_TYPE_LANE_ETH1000: 157 return "OSD_GbE_LANE"; 158 case QETH_LINK_TYPE_LANE: 159 return "OSD_ATM_LANE"; 160 default: 161 return "OSD_Express"; 162 } 163 case QETH_CARD_TYPE_IQD: 164 return "HiperSockets"; 165 case QETH_CARD_TYPE_OSN: 166 return "OSN"; 167 case QETH_CARD_TYPE_OSM: 168 return "OSM_1000"; 169 case QETH_CARD_TYPE_OSX: 170 return "OSX_10GIG"; 171 default: 172 return "unknown"; 173 } 174 } 175 return "n/a"; 176 } 177 178 void qeth_set_allowed_threads(struct qeth_card *card, unsigned long threads, 179 int clear_start_mask) 180 { 181 unsigned long flags; 182 183 spin_lock_irqsave(&card->thread_mask_lock, flags); 184 card->thread_allowed_mask = threads; 185 if (clear_start_mask) 186 card->thread_start_mask &= threads; 187 spin_unlock_irqrestore(&card->thread_mask_lock, flags); 188 wake_up(&card->wait_q); 189 } 190 EXPORT_SYMBOL_GPL(qeth_set_allowed_threads); 191 192 int qeth_threads_running(struct qeth_card *card, unsigned long threads) 193 { 194 unsigned long flags; 195 int rc = 0; 196 197 spin_lock_irqsave(&card->thread_mask_lock, flags); 198 rc = (card->thread_running_mask & threads); 199 spin_unlock_irqrestore(&card->thread_mask_lock, flags); 200 return rc; 201 } 202 EXPORT_SYMBOL_GPL(qeth_threads_running); 203 204 static void qeth_clear_working_pool_list(struct qeth_card *card) 205 { 206 struct qeth_buffer_pool_entry *pool_entry, *tmp; 207 struct qeth_qdio_q *queue = card->qdio.in_q; 208 unsigned int i; 209 210 QETH_CARD_TEXT(card, 5, "clwrklst"); 211 list_for_each_entry_safe(pool_entry, tmp, 212 &card->qdio.in_buf_pool.entry_list, list) 213 list_del(&pool_entry->list); 214 215 for (i = 0; i < ARRAY_SIZE(queue->bufs); i++) 216 queue->bufs[i].pool_entry = NULL; 217 } 218 219 static void qeth_free_pool_entry(struct qeth_buffer_pool_entry *entry) 220 { 221 unsigned int i; 222 223 for (i = 0; i < ARRAY_SIZE(entry->elements); i++) { 224 if (entry->elements[i]) 225 __free_page(entry->elements[i]); 226 } 227 228 kfree(entry); 229 } 230 231 static void qeth_free_buffer_pool(struct qeth_card *card) 232 { 233 struct qeth_buffer_pool_entry *entry, *tmp; 234 235 list_for_each_entry_safe(entry, tmp, &card->qdio.init_pool.entry_list, 236 init_list) { 237 list_del(&entry->init_list); 238 qeth_free_pool_entry(entry); 239 } 240 } 241 242 static struct qeth_buffer_pool_entry *qeth_alloc_pool_entry(unsigned int pages) 243 { 244 struct qeth_buffer_pool_entry *entry; 245 unsigned int i; 246 247 entry = kzalloc(sizeof(*entry), GFP_KERNEL); 248 if (!entry) 249 return NULL; 250 251 for (i = 0; i < pages; i++) { 252 entry->elements[i] = __dev_alloc_page(GFP_KERNEL); 253 254 if (!entry->elements[i]) { 255 qeth_free_pool_entry(entry); 256 return NULL; 257 } 258 } 259 260 return entry; 261 } 262 263 static int qeth_alloc_buffer_pool(struct qeth_card *card) 264 { 265 unsigned int buf_elements = QETH_MAX_BUFFER_ELEMENTS(card); 266 unsigned int i; 267 268 QETH_CARD_TEXT(card, 5, "alocpool"); 269 for (i = 0; i < card->qdio.init_pool.buf_count; ++i) { 270 struct qeth_buffer_pool_entry *entry; 271 272 entry = qeth_alloc_pool_entry(buf_elements); 273 if (!entry) { 274 qeth_free_buffer_pool(card); 275 return -ENOMEM; 276 } 277 278 list_add(&entry->init_list, &card->qdio.init_pool.entry_list); 279 } 280 return 0; 281 } 282 283 int qeth_resize_buffer_pool(struct qeth_card *card, unsigned int count) 284 { 285 unsigned int buf_elements = QETH_MAX_BUFFER_ELEMENTS(card); 286 struct qeth_qdio_buffer_pool *pool = &card->qdio.init_pool; 287 struct qeth_buffer_pool_entry *entry, *tmp; 288 int delta = count - pool->buf_count; 289 LIST_HEAD(entries); 290 291 QETH_CARD_TEXT(card, 2, "realcbp"); 292 293 /* Defer until queue is allocated: */ 294 if (!card->qdio.in_q) 295 goto out; 296 297 /* Remove entries from the pool: */ 298 while (delta < 0) { 299 entry = list_first_entry(&pool->entry_list, 300 struct qeth_buffer_pool_entry, 301 init_list); 302 list_del(&entry->init_list); 303 qeth_free_pool_entry(entry); 304 305 delta++; 306 } 307 308 /* Allocate additional entries: */ 309 while (delta > 0) { 310 entry = qeth_alloc_pool_entry(buf_elements); 311 if (!entry) { 312 list_for_each_entry_safe(entry, tmp, &entries, 313 init_list) { 314 list_del(&entry->init_list); 315 qeth_free_pool_entry(entry); 316 } 317 318 return -ENOMEM; 319 } 320 321 list_add(&entry->init_list, &entries); 322 323 delta--; 324 } 325 326 list_splice(&entries, &pool->entry_list); 327 328 out: 329 card->qdio.in_buf_pool.buf_count = count; 330 pool->buf_count = count; 331 return 0; 332 } 333 EXPORT_SYMBOL_GPL(qeth_resize_buffer_pool); 334 335 static void qeth_free_qdio_queue(struct qeth_qdio_q *q) 336 { 337 if (!q) 338 return; 339 340 qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q); 341 kfree(q); 342 } 343 344 static struct qeth_qdio_q *qeth_alloc_qdio_queue(void) 345 { 346 struct qeth_qdio_q *q = kzalloc(sizeof(*q), GFP_KERNEL); 347 int i; 348 349 if (!q) 350 return NULL; 351 352 if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) { 353 kfree(q); 354 return NULL; 355 } 356 357 for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i) 358 q->bufs[i].buffer = q->qdio_bufs[i]; 359 360 QETH_DBF_HEX(SETUP, 2, &q, sizeof(void *)); 361 return q; 362 } 363 364 static int qeth_cq_init(struct qeth_card *card) 365 { 366 int rc; 367 368 if (card->options.cq == QETH_CQ_ENABLED) { 369 QETH_CARD_TEXT(card, 2, "cqinit"); 370 qdio_reset_buffers(card->qdio.c_q->qdio_bufs, 371 QDIO_MAX_BUFFERS_PER_Q); 372 card->qdio.c_q->next_buf_to_init = 127; 373 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 374 card->qdio.no_in_queues - 1, 0, 375 127); 376 if (rc) { 377 QETH_CARD_TEXT_(card, 2, "1err%d", rc); 378 goto out; 379 } 380 } 381 rc = 0; 382 out: 383 return rc; 384 } 385 386 static int qeth_alloc_cq(struct qeth_card *card) 387 { 388 int rc; 389 390 if (card->options.cq == QETH_CQ_ENABLED) { 391 int i; 392 struct qdio_outbuf_state *outbuf_states; 393 394 QETH_CARD_TEXT(card, 2, "cqon"); 395 card->qdio.c_q = qeth_alloc_qdio_queue(); 396 if (!card->qdio.c_q) { 397 rc = -1; 398 goto kmsg_out; 399 } 400 card->qdio.no_in_queues = 2; 401 card->qdio.out_bufstates = 402 kcalloc(card->qdio.no_out_queues * 403 QDIO_MAX_BUFFERS_PER_Q, 404 sizeof(struct qdio_outbuf_state), 405 GFP_KERNEL); 406 outbuf_states = card->qdio.out_bufstates; 407 if (outbuf_states == NULL) { 408 rc = -1; 409 goto free_cq_out; 410 } 411 for (i = 0; i < card->qdio.no_out_queues; ++i) { 412 card->qdio.out_qs[i]->bufstates = outbuf_states; 413 outbuf_states += QDIO_MAX_BUFFERS_PER_Q; 414 } 415 } else { 416 QETH_CARD_TEXT(card, 2, "nocq"); 417 card->qdio.c_q = NULL; 418 card->qdio.no_in_queues = 1; 419 } 420 QETH_CARD_TEXT_(card, 2, "iqc%d", card->qdio.no_in_queues); 421 rc = 0; 422 out: 423 return rc; 424 free_cq_out: 425 qeth_free_qdio_queue(card->qdio.c_q); 426 card->qdio.c_q = NULL; 427 kmsg_out: 428 dev_err(&card->gdev->dev, "Failed to create completion queue\n"); 429 goto out; 430 } 431 432 static void qeth_free_cq(struct qeth_card *card) 433 { 434 if (card->qdio.c_q) { 435 --card->qdio.no_in_queues; 436 qeth_free_qdio_queue(card->qdio.c_q); 437 card->qdio.c_q = NULL; 438 } 439 kfree(card->qdio.out_bufstates); 440 card->qdio.out_bufstates = NULL; 441 } 442 443 static enum iucv_tx_notify qeth_compute_cq_notification(int sbalf15, 444 int delayed) 445 { 446 enum iucv_tx_notify n; 447 448 switch (sbalf15) { 449 case 0: 450 n = delayed ? TX_NOTIFY_DELAYED_OK : TX_NOTIFY_OK; 451 break; 452 case 4: 453 case 16: 454 case 17: 455 case 18: 456 n = delayed ? TX_NOTIFY_DELAYED_UNREACHABLE : 457 TX_NOTIFY_UNREACHABLE; 458 break; 459 default: 460 n = delayed ? TX_NOTIFY_DELAYED_GENERALERROR : 461 TX_NOTIFY_GENERALERROR; 462 break; 463 } 464 465 return n; 466 } 467 468 static void qeth_cleanup_handled_pending(struct qeth_qdio_out_q *q, int bidx, 469 int forced_cleanup) 470 { 471 if (q->card->options.cq != QETH_CQ_ENABLED) 472 return; 473 474 if (q->bufs[bidx]->next_pending != NULL) { 475 struct qeth_qdio_out_buffer *head = q->bufs[bidx]; 476 struct qeth_qdio_out_buffer *c = q->bufs[bidx]->next_pending; 477 478 while (c) { 479 if (forced_cleanup || 480 atomic_read(&c->state) == QETH_QDIO_BUF_EMPTY) { 481 struct qeth_qdio_out_buffer *f = c; 482 483 QETH_CARD_TEXT(f->q->card, 5, "fp"); 484 QETH_CARD_TEXT_(f->q->card, 5, "%lx", (long) f); 485 /* release here to avoid interleaving between 486 outbound tasklet and inbound tasklet 487 regarding notifications and lifecycle */ 488 qeth_tx_complete_buf(c, forced_cleanup, 0); 489 490 c = f->next_pending; 491 WARN_ON_ONCE(head->next_pending != f); 492 head->next_pending = c; 493 kmem_cache_free(qeth_qdio_outbuf_cache, f); 494 } else { 495 head = c; 496 c = c->next_pending; 497 } 498 499 } 500 } 501 } 502 503 static void qeth_qdio_handle_aob(struct qeth_card *card, 504 unsigned long phys_aob_addr) 505 { 506 enum qeth_qdio_out_buffer_state new_state = QETH_QDIO_BUF_QAOB_OK; 507 struct qaob *aob; 508 struct qeth_qdio_out_buffer *buffer; 509 enum iucv_tx_notify notification; 510 unsigned int i; 511 512 aob = (struct qaob *) phys_to_virt(phys_aob_addr); 513 QETH_CARD_TEXT(card, 5, "haob"); 514 QETH_CARD_TEXT_(card, 5, "%lx", phys_aob_addr); 515 buffer = (struct qeth_qdio_out_buffer *) aob->user1; 516 QETH_CARD_TEXT_(card, 5, "%lx", aob->user1); 517 518 if (aob->aorc) { 519 QETH_CARD_TEXT_(card, 2, "aorc%02X", aob->aorc); 520 new_state = QETH_QDIO_BUF_QAOB_ERROR; 521 } 522 523 switch (atomic_xchg(&buffer->state, new_state)) { 524 case QETH_QDIO_BUF_PRIMED: 525 /* Faster than TX completion code, let it handle the async 526 * completion for us. 527 */ 528 break; 529 case QETH_QDIO_BUF_PENDING: 530 /* TX completion code is active and will handle the async 531 * completion for us. 532 */ 533 break; 534 case QETH_QDIO_BUF_NEED_QAOB: 535 /* TX completion code is already finished. */ 536 notification = qeth_compute_cq_notification(aob->aorc, 1); 537 qeth_notify_skbs(buffer->q, buffer, notification); 538 539 /* Free dangling allocations. The attached skbs are handled by 540 * qeth_cleanup_handled_pending(). 541 */ 542 for (i = 0; 543 i < aob->sb_count && i < QETH_MAX_BUFFER_ELEMENTS(card); 544 i++) { 545 void *data = phys_to_virt(aob->sba[i]); 546 547 if (data && buffer->is_header[i]) 548 kmem_cache_free(qeth_core_header_cache, data); 549 buffer->is_header[i] = 0; 550 } 551 552 atomic_set(&buffer->state, QETH_QDIO_BUF_EMPTY); 553 break; 554 default: 555 WARN_ON_ONCE(1); 556 } 557 558 qdio_release_aob(aob); 559 } 560 561 static void qeth_setup_ccw(struct ccw1 *ccw, u8 cmd_code, u8 flags, u32 len, 562 void *data) 563 { 564 ccw->cmd_code = cmd_code; 565 ccw->flags = flags | CCW_FLAG_SLI; 566 ccw->count = len; 567 ccw->cda = (__u32) __pa(data); 568 } 569 570 static int __qeth_issue_next_read(struct qeth_card *card) 571 { 572 struct qeth_cmd_buffer *iob = card->read_cmd; 573 struct qeth_channel *channel = iob->channel; 574 struct ccw1 *ccw = __ccw_from_cmd(iob); 575 int rc; 576 577 QETH_CARD_TEXT(card, 5, "issnxrd"); 578 if (channel->state != CH_STATE_UP) 579 return -EIO; 580 581 memset(iob->data, 0, iob->length); 582 qeth_setup_ccw(ccw, CCW_CMD_READ, 0, iob->length, iob->data); 583 iob->callback = qeth_issue_next_read_cb; 584 /* keep the cmd alive after completion: */ 585 qeth_get_cmd(iob); 586 587 QETH_CARD_TEXT(card, 6, "noirqpnd"); 588 rc = ccw_device_start(channel->ccwdev, ccw, (addr_t) iob, 0, 0); 589 if (!rc) { 590 channel->active_cmd = iob; 591 } else { 592 QETH_DBF_MESSAGE(2, "error %i on device %x when starting next read ccw!\n", 593 rc, CARD_DEVID(card)); 594 qeth_unlock_channel(card, channel); 595 qeth_put_cmd(iob); 596 card->read_or_write_problem = 1; 597 qeth_schedule_recovery(card); 598 } 599 return rc; 600 } 601 602 static int qeth_issue_next_read(struct qeth_card *card) 603 { 604 int ret; 605 606 spin_lock_irq(get_ccwdev_lock(CARD_RDEV(card))); 607 ret = __qeth_issue_next_read(card); 608 spin_unlock_irq(get_ccwdev_lock(CARD_RDEV(card))); 609 610 return ret; 611 } 612 613 static void qeth_enqueue_cmd(struct qeth_card *card, 614 struct qeth_cmd_buffer *iob) 615 { 616 spin_lock_irq(&card->lock); 617 list_add_tail(&iob->list_entry, &card->cmd_waiter_list); 618 spin_unlock_irq(&card->lock); 619 } 620 621 static void qeth_dequeue_cmd(struct qeth_card *card, 622 struct qeth_cmd_buffer *iob) 623 { 624 spin_lock_irq(&card->lock); 625 list_del(&iob->list_entry); 626 spin_unlock_irq(&card->lock); 627 } 628 629 void qeth_notify_cmd(struct qeth_cmd_buffer *iob, int reason) 630 { 631 iob->rc = reason; 632 complete(&iob->done); 633 } 634 EXPORT_SYMBOL_GPL(qeth_notify_cmd); 635 636 static void qeth_flush_local_addrs4(struct qeth_card *card) 637 { 638 struct qeth_local_addr *addr; 639 struct hlist_node *tmp; 640 unsigned int i; 641 642 spin_lock_irq(&card->local_addrs4_lock); 643 hash_for_each_safe(card->local_addrs4, i, tmp, addr, hnode) { 644 hash_del_rcu(&addr->hnode); 645 kfree_rcu(addr, rcu); 646 } 647 spin_unlock_irq(&card->local_addrs4_lock); 648 } 649 650 static void qeth_flush_local_addrs6(struct qeth_card *card) 651 { 652 struct qeth_local_addr *addr; 653 struct hlist_node *tmp; 654 unsigned int i; 655 656 spin_lock_irq(&card->local_addrs6_lock); 657 hash_for_each_safe(card->local_addrs6, i, tmp, addr, hnode) { 658 hash_del_rcu(&addr->hnode); 659 kfree_rcu(addr, rcu); 660 } 661 spin_unlock_irq(&card->local_addrs6_lock); 662 } 663 664 static void qeth_flush_local_addrs(struct qeth_card *card) 665 { 666 qeth_flush_local_addrs4(card); 667 qeth_flush_local_addrs6(card); 668 } 669 670 static void qeth_add_local_addrs4(struct qeth_card *card, 671 struct qeth_ipacmd_local_addrs4 *cmd) 672 { 673 unsigned int i; 674 675 if (cmd->addr_length != 676 sizeof_field(struct qeth_ipacmd_local_addr4, addr)) { 677 dev_err_ratelimited(&card->gdev->dev, 678 "Dropped IPv4 ADD LOCAL ADDR event with bad length %u\n", 679 cmd->addr_length); 680 return; 681 } 682 683 spin_lock(&card->local_addrs4_lock); 684 for (i = 0; i < cmd->count; i++) { 685 unsigned int key = ipv4_addr_hash(cmd->addrs[i].addr); 686 struct qeth_local_addr *addr; 687 bool duplicate = false; 688 689 hash_for_each_possible(card->local_addrs4, addr, hnode, key) { 690 if (addr->addr.s6_addr32[3] == cmd->addrs[i].addr) { 691 duplicate = true; 692 break; 693 } 694 } 695 696 if (duplicate) 697 continue; 698 699 addr = kmalloc(sizeof(*addr), GFP_ATOMIC); 700 if (!addr) { 701 dev_err(&card->gdev->dev, 702 "Failed to allocate local addr object. Traffic to %pI4 might suffer.\n", 703 &cmd->addrs[i].addr); 704 continue; 705 } 706 707 ipv6_addr_set(&addr->addr, 0, 0, 0, cmd->addrs[i].addr); 708 hash_add_rcu(card->local_addrs4, &addr->hnode, key); 709 } 710 spin_unlock(&card->local_addrs4_lock); 711 } 712 713 static void qeth_add_local_addrs6(struct qeth_card *card, 714 struct qeth_ipacmd_local_addrs6 *cmd) 715 { 716 unsigned int i; 717 718 if (cmd->addr_length != 719 sizeof_field(struct qeth_ipacmd_local_addr6, addr)) { 720 dev_err_ratelimited(&card->gdev->dev, 721 "Dropped IPv6 ADD LOCAL ADDR event with bad length %u\n", 722 cmd->addr_length); 723 return; 724 } 725 726 spin_lock(&card->local_addrs6_lock); 727 for (i = 0; i < cmd->count; i++) { 728 u32 key = ipv6_addr_hash(&cmd->addrs[i].addr); 729 struct qeth_local_addr *addr; 730 bool duplicate = false; 731 732 hash_for_each_possible(card->local_addrs6, addr, hnode, key) { 733 if (ipv6_addr_equal(&addr->addr, &cmd->addrs[i].addr)) { 734 duplicate = true; 735 break; 736 } 737 } 738 739 if (duplicate) 740 continue; 741 742 addr = kmalloc(sizeof(*addr), GFP_ATOMIC); 743 if (!addr) { 744 dev_err(&card->gdev->dev, 745 "Failed to allocate local addr object. Traffic to %pI6c might suffer.\n", 746 &cmd->addrs[i].addr); 747 continue; 748 } 749 750 addr->addr = cmd->addrs[i].addr; 751 hash_add_rcu(card->local_addrs6, &addr->hnode, key); 752 } 753 spin_unlock(&card->local_addrs6_lock); 754 } 755 756 static void qeth_del_local_addrs4(struct qeth_card *card, 757 struct qeth_ipacmd_local_addrs4 *cmd) 758 { 759 unsigned int i; 760 761 if (cmd->addr_length != 762 sizeof_field(struct qeth_ipacmd_local_addr4, addr)) { 763 dev_err_ratelimited(&card->gdev->dev, 764 "Dropped IPv4 DEL LOCAL ADDR event with bad length %u\n", 765 cmd->addr_length); 766 return; 767 } 768 769 spin_lock(&card->local_addrs4_lock); 770 for (i = 0; i < cmd->count; i++) { 771 struct qeth_ipacmd_local_addr4 *addr = &cmd->addrs[i]; 772 unsigned int key = ipv4_addr_hash(addr->addr); 773 struct qeth_local_addr *tmp; 774 775 hash_for_each_possible(card->local_addrs4, tmp, hnode, key) { 776 if (tmp->addr.s6_addr32[3] == addr->addr) { 777 hash_del_rcu(&tmp->hnode); 778 kfree_rcu(tmp, rcu); 779 break; 780 } 781 } 782 } 783 spin_unlock(&card->local_addrs4_lock); 784 } 785 786 static void qeth_del_local_addrs6(struct qeth_card *card, 787 struct qeth_ipacmd_local_addrs6 *cmd) 788 { 789 unsigned int i; 790 791 if (cmd->addr_length != 792 sizeof_field(struct qeth_ipacmd_local_addr6, addr)) { 793 dev_err_ratelimited(&card->gdev->dev, 794 "Dropped IPv6 DEL LOCAL ADDR event with bad length %u\n", 795 cmd->addr_length); 796 return; 797 } 798 799 spin_lock(&card->local_addrs6_lock); 800 for (i = 0; i < cmd->count; i++) { 801 struct qeth_ipacmd_local_addr6 *addr = &cmd->addrs[i]; 802 u32 key = ipv6_addr_hash(&addr->addr); 803 struct qeth_local_addr *tmp; 804 805 hash_for_each_possible(card->local_addrs6, tmp, hnode, key) { 806 if (ipv6_addr_equal(&tmp->addr, &addr->addr)) { 807 hash_del_rcu(&tmp->hnode); 808 kfree_rcu(tmp, rcu); 809 break; 810 } 811 } 812 } 813 spin_unlock(&card->local_addrs6_lock); 814 } 815 816 static bool qeth_next_hop_is_local_v4(struct qeth_card *card, 817 struct sk_buff *skb) 818 { 819 struct qeth_local_addr *tmp; 820 bool is_local = false; 821 unsigned int key; 822 __be32 next_hop; 823 824 if (hash_empty(card->local_addrs4)) 825 return false; 826 827 rcu_read_lock(); 828 next_hop = qeth_next_hop_v4_rcu(skb, 829 qeth_dst_check_rcu(skb, htons(ETH_P_IP))); 830 key = ipv4_addr_hash(next_hop); 831 832 hash_for_each_possible_rcu(card->local_addrs4, tmp, hnode, key) { 833 if (tmp->addr.s6_addr32[3] == next_hop) { 834 is_local = true; 835 break; 836 } 837 } 838 rcu_read_unlock(); 839 840 return is_local; 841 } 842 843 static bool qeth_next_hop_is_local_v6(struct qeth_card *card, 844 struct sk_buff *skb) 845 { 846 struct qeth_local_addr *tmp; 847 struct in6_addr *next_hop; 848 bool is_local = false; 849 u32 key; 850 851 if (hash_empty(card->local_addrs6)) 852 return false; 853 854 rcu_read_lock(); 855 next_hop = qeth_next_hop_v6_rcu(skb, 856 qeth_dst_check_rcu(skb, htons(ETH_P_IPV6))); 857 key = ipv6_addr_hash(next_hop); 858 859 hash_for_each_possible_rcu(card->local_addrs6, tmp, hnode, key) { 860 if (ipv6_addr_equal(&tmp->addr, next_hop)) { 861 is_local = true; 862 break; 863 } 864 } 865 rcu_read_unlock(); 866 867 return is_local; 868 } 869 870 static int qeth_debugfs_local_addr_show(struct seq_file *m, void *v) 871 { 872 struct qeth_card *card = m->private; 873 struct qeth_local_addr *tmp; 874 unsigned int i; 875 876 rcu_read_lock(); 877 hash_for_each_rcu(card->local_addrs4, i, tmp, hnode) 878 seq_printf(m, "%pI4\n", &tmp->addr.s6_addr32[3]); 879 hash_for_each_rcu(card->local_addrs6, i, tmp, hnode) 880 seq_printf(m, "%pI6c\n", &tmp->addr); 881 rcu_read_unlock(); 882 883 return 0; 884 } 885 886 DEFINE_SHOW_ATTRIBUTE(qeth_debugfs_local_addr); 887 888 static void qeth_issue_ipa_msg(struct qeth_ipa_cmd *cmd, int rc, 889 struct qeth_card *card) 890 { 891 const char *ipa_name; 892 int com = cmd->hdr.command; 893 894 ipa_name = qeth_get_ipa_cmd_name(com); 895 896 if (rc) 897 QETH_DBF_MESSAGE(2, "IPA: %s(%#x) for device %x returned %#x \"%s\"\n", 898 ipa_name, com, CARD_DEVID(card), rc, 899 qeth_get_ipa_msg(rc)); 900 else 901 QETH_DBF_MESSAGE(5, "IPA: %s(%#x) for device %x succeeded\n", 902 ipa_name, com, CARD_DEVID(card)); 903 } 904 905 static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card, 906 struct qeth_ipa_cmd *cmd) 907 { 908 QETH_CARD_TEXT(card, 5, "chkipad"); 909 910 if (IS_IPA_REPLY(cmd)) { 911 if (cmd->hdr.command != IPA_CMD_SETCCID && 912 cmd->hdr.command != IPA_CMD_DELCCID && 913 cmd->hdr.command != IPA_CMD_MODCCID && 914 cmd->hdr.command != IPA_CMD_SET_DIAG_ASS) 915 qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card); 916 return cmd; 917 } 918 919 /* handle unsolicited event: */ 920 switch (cmd->hdr.command) { 921 case IPA_CMD_STOPLAN: 922 if (cmd->hdr.return_code == IPA_RC_VEPA_TO_VEB_TRANSITION) { 923 dev_err(&card->gdev->dev, 924 "Interface %s is down because the adjacent port is no longer in reflective relay mode\n", 925 netdev_name(card->dev)); 926 schedule_work(&card->close_dev_work); 927 } else { 928 dev_warn(&card->gdev->dev, 929 "The link for interface %s on CHPID 0x%X failed\n", 930 netdev_name(card->dev), card->info.chpid); 931 qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card); 932 netif_carrier_off(card->dev); 933 } 934 return NULL; 935 case IPA_CMD_STARTLAN: 936 dev_info(&card->gdev->dev, 937 "The link for %s on CHPID 0x%X has been restored\n", 938 netdev_name(card->dev), card->info.chpid); 939 if (card->info.hwtrap) 940 card->info.hwtrap = 2; 941 qeth_schedule_recovery(card); 942 return NULL; 943 case IPA_CMD_SETBRIDGEPORT_IQD: 944 case IPA_CMD_SETBRIDGEPORT_OSA: 945 case IPA_CMD_ADDRESS_CHANGE_NOTIF: 946 if (card->discipline->control_event_handler(card, cmd)) 947 return cmd; 948 return NULL; 949 case IPA_CMD_MODCCID: 950 return cmd; 951 case IPA_CMD_REGISTER_LOCAL_ADDR: 952 if (cmd->hdr.prot_version == QETH_PROT_IPV4) 953 qeth_add_local_addrs4(card, &cmd->data.local_addrs4); 954 else if (cmd->hdr.prot_version == QETH_PROT_IPV6) 955 qeth_add_local_addrs6(card, &cmd->data.local_addrs6); 956 957 QETH_CARD_TEXT(card, 3, "irla"); 958 return NULL; 959 case IPA_CMD_UNREGISTER_LOCAL_ADDR: 960 if (cmd->hdr.prot_version == QETH_PROT_IPV4) 961 qeth_del_local_addrs4(card, &cmd->data.local_addrs4); 962 else if (cmd->hdr.prot_version == QETH_PROT_IPV6) 963 qeth_del_local_addrs6(card, &cmd->data.local_addrs6); 964 965 QETH_CARD_TEXT(card, 3, "urla"); 966 return NULL; 967 default: 968 QETH_DBF_MESSAGE(2, "Received data is IPA but not a reply!\n"); 969 return cmd; 970 } 971 } 972 973 static void qeth_clear_ipacmd_list(struct qeth_card *card) 974 { 975 struct qeth_cmd_buffer *iob; 976 unsigned long flags; 977 978 QETH_CARD_TEXT(card, 4, "clipalst"); 979 980 spin_lock_irqsave(&card->lock, flags); 981 list_for_each_entry(iob, &card->cmd_waiter_list, list_entry) 982 qeth_notify_cmd(iob, -ECANCELED); 983 spin_unlock_irqrestore(&card->lock, flags); 984 } 985 986 static int qeth_check_idx_response(struct qeth_card *card, 987 unsigned char *buffer) 988 { 989 QETH_DBF_HEX(CTRL, 2, buffer, QETH_DBF_CTRL_LEN); 990 if ((buffer[2] & QETH_IDX_TERMINATE_MASK) == QETH_IDX_TERMINATE) { 991 QETH_DBF_MESSAGE(2, "received an IDX TERMINATE with cause code %#04x\n", 992 buffer[4]); 993 QETH_CARD_TEXT(card, 2, "ckidxres"); 994 QETH_CARD_TEXT(card, 2, " idxterm"); 995 QETH_CARD_TEXT_(card, 2, "rc%x", buffer[4]); 996 if (buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT || 997 buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT_VM) { 998 dev_err(&card->gdev->dev, 999 "The device does not support the configured transport mode\n"); 1000 return -EPROTONOSUPPORT; 1001 } 1002 return -EIO; 1003 } 1004 return 0; 1005 } 1006 1007 void qeth_put_cmd(struct qeth_cmd_buffer *iob) 1008 { 1009 if (refcount_dec_and_test(&iob->ref_count)) { 1010 kfree(iob->data); 1011 kfree(iob); 1012 } 1013 } 1014 EXPORT_SYMBOL_GPL(qeth_put_cmd); 1015 1016 static void qeth_release_buffer_cb(struct qeth_card *card, 1017 struct qeth_cmd_buffer *iob, 1018 unsigned int data_length) 1019 { 1020 qeth_put_cmd(iob); 1021 } 1022 1023 static void qeth_cancel_cmd(struct qeth_cmd_buffer *iob, int rc) 1024 { 1025 qeth_notify_cmd(iob, rc); 1026 qeth_put_cmd(iob); 1027 } 1028 1029 struct qeth_cmd_buffer *qeth_alloc_cmd(struct qeth_channel *channel, 1030 unsigned int length, unsigned int ccws, 1031 long timeout) 1032 { 1033 struct qeth_cmd_buffer *iob; 1034 1035 if (length > QETH_BUFSIZE) 1036 return NULL; 1037 1038 iob = kzalloc(sizeof(*iob), GFP_KERNEL); 1039 if (!iob) 1040 return NULL; 1041 1042 iob->data = kzalloc(ALIGN(length, 8) + ccws * sizeof(struct ccw1), 1043 GFP_KERNEL | GFP_DMA); 1044 if (!iob->data) { 1045 kfree(iob); 1046 return NULL; 1047 } 1048 1049 init_completion(&iob->done); 1050 spin_lock_init(&iob->lock); 1051 refcount_set(&iob->ref_count, 1); 1052 iob->channel = channel; 1053 iob->timeout = timeout; 1054 iob->length = length; 1055 return iob; 1056 } 1057 EXPORT_SYMBOL_GPL(qeth_alloc_cmd); 1058 1059 static void qeth_issue_next_read_cb(struct qeth_card *card, 1060 struct qeth_cmd_buffer *iob, 1061 unsigned int data_length) 1062 { 1063 struct qeth_cmd_buffer *request = NULL; 1064 struct qeth_ipa_cmd *cmd = NULL; 1065 struct qeth_reply *reply = NULL; 1066 struct qeth_cmd_buffer *tmp; 1067 unsigned long flags; 1068 int rc = 0; 1069 1070 QETH_CARD_TEXT(card, 4, "sndctlcb"); 1071 rc = qeth_check_idx_response(card, iob->data); 1072 switch (rc) { 1073 case 0: 1074 break; 1075 case -EIO: 1076 qeth_schedule_recovery(card); 1077 fallthrough; 1078 default: 1079 qeth_clear_ipacmd_list(card); 1080 goto err_idx; 1081 } 1082 1083 cmd = __ipa_reply(iob); 1084 if (cmd) { 1085 cmd = qeth_check_ipa_data(card, cmd); 1086 if (!cmd) 1087 goto out; 1088 if (IS_OSN(card) && card->osn_info.assist_cb && 1089 cmd->hdr.command != IPA_CMD_STARTLAN) { 1090 card->osn_info.assist_cb(card->dev, cmd); 1091 goto out; 1092 } 1093 } 1094 1095 /* match against pending cmd requests */ 1096 spin_lock_irqsave(&card->lock, flags); 1097 list_for_each_entry(tmp, &card->cmd_waiter_list, list_entry) { 1098 if (tmp->match && tmp->match(tmp, iob)) { 1099 request = tmp; 1100 /* take the object outside the lock */ 1101 qeth_get_cmd(request); 1102 break; 1103 } 1104 } 1105 spin_unlock_irqrestore(&card->lock, flags); 1106 1107 if (!request) 1108 goto out; 1109 1110 reply = &request->reply; 1111 if (!reply->callback) { 1112 rc = 0; 1113 goto no_callback; 1114 } 1115 1116 spin_lock_irqsave(&request->lock, flags); 1117 if (request->rc) 1118 /* Bail out when the requestor has already left: */ 1119 rc = request->rc; 1120 else 1121 rc = reply->callback(card, reply, cmd ? (unsigned long)cmd : 1122 (unsigned long)iob); 1123 spin_unlock_irqrestore(&request->lock, flags); 1124 1125 no_callback: 1126 if (rc <= 0) 1127 qeth_notify_cmd(request, rc); 1128 qeth_put_cmd(request); 1129 out: 1130 memcpy(&card->seqno.pdu_hdr_ack, 1131 QETH_PDU_HEADER_SEQ_NO(iob->data), 1132 QETH_SEQ_NO_LENGTH); 1133 __qeth_issue_next_read(card); 1134 err_idx: 1135 qeth_put_cmd(iob); 1136 } 1137 1138 static int qeth_set_thread_start_bit(struct qeth_card *card, 1139 unsigned long thread) 1140 { 1141 unsigned long flags; 1142 int rc = 0; 1143 1144 spin_lock_irqsave(&card->thread_mask_lock, flags); 1145 if (!(card->thread_allowed_mask & thread)) 1146 rc = -EPERM; 1147 else if (card->thread_start_mask & thread) 1148 rc = -EBUSY; 1149 else 1150 card->thread_start_mask |= thread; 1151 spin_unlock_irqrestore(&card->thread_mask_lock, flags); 1152 1153 return rc; 1154 } 1155 1156 static void qeth_clear_thread_start_bit(struct qeth_card *card, 1157 unsigned long thread) 1158 { 1159 unsigned long flags; 1160 1161 spin_lock_irqsave(&card->thread_mask_lock, flags); 1162 card->thread_start_mask &= ~thread; 1163 spin_unlock_irqrestore(&card->thread_mask_lock, flags); 1164 wake_up(&card->wait_q); 1165 } 1166 1167 static void qeth_clear_thread_running_bit(struct qeth_card *card, 1168 unsigned long thread) 1169 { 1170 unsigned long flags; 1171 1172 spin_lock_irqsave(&card->thread_mask_lock, flags); 1173 card->thread_running_mask &= ~thread; 1174 spin_unlock_irqrestore(&card->thread_mask_lock, flags); 1175 wake_up_all(&card->wait_q); 1176 } 1177 1178 static int __qeth_do_run_thread(struct qeth_card *card, unsigned long thread) 1179 { 1180 unsigned long flags; 1181 int rc = 0; 1182 1183 spin_lock_irqsave(&card->thread_mask_lock, flags); 1184 if (card->thread_start_mask & thread) { 1185 if ((card->thread_allowed_mask & thread) && 1186 !(card->thread_running_mask & thread)) { 1187 rc = 1; 1188 card->thread_start_mask &= ~thread; 1189 card->thread_running_mask |= thread; 1190 } else 1191 rc = -EPERM; 1192 } 1193 spin_unlock_irqrestore(&card->thread_mask_lock, flags); 1194 return rc; 1195 } 1196 1197 static int qeth_do_run_thread(struct qeth_card *card, unsigned long thread) 1198 { 1199 int rc = 0; 1200 1201 wait_event(card->wait_q, 1202 (rc = __qeth_do_run_thread(card, thread)) >= 0); 1203 return rc; 1204 } 1205 1206 int qeth_schedule_recovery(struct qeth_card *card) 1207 { 1208 int rc; 1209 1210 QETH_CARD_TEXT(card, 2, "startrec"); 1211 1212 rc = qeth_set_thread_start_bit(card, QETH_RECOVER_THREAD); 1213 if (!rc) 1214 schedule_work(&card->kernel_thread_starter); 1215 1216 return rc; 1217 } 1218 1219 static int qeth_get_problem(struct qeth_card *card, struct ccw_device *cdev, 1220 struct irb *irb) 1221 { 1222 int dstat, cstat; 1223 char *sense; 1224 1225 sense = (char *) irb->ecw; 1226 cstat = irb->scsw.cmd.cstat; 1227 dstat = irb->scsw.cmd.dstat; 1228 1229 if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK | 1230 SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK | 1231 SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) { 1232 QETH_CARD_TEXT(card, 2, "CGENCHK"); 1233 dev_warn(&cdev->dev, "The qeth device driver " 1234 "failed to recover an error on the device\n"); 1235 QETH_DBF_MESSAGE(2, "check on channel %x with dstat=%#x, cstat=%#x\n", 1236 CCW_DEVID(cdev), dstat, cstat); 1237 print_hex_dump(KERN_WARNING, "qeth: irb ", DUMP_PREFIX_OFFSET, 1238 16, 1, irb, 64, 1); 1239 return -EIO; 1240 } 1241 1242 if (dstat & DEV_STAT_UNIT_CHECK) { 1243 if (sense[SENSE_RESETTING_EVENT_BYTE] & 1244 SENSE_RESETTING_EVENT_FLAG) { 1245 QETH_CARD_TEXT(card, 2, "REVIND"); 1246 return -EIO; 1247 } 1248 if (sense[SENSE_COMMAND_REJECT_BYTE] & 1249 SENSE_COMMAND_REJECT_FLAG) { 1250 QETH_CARD_TEXT(card, 2, "CMDREJi"); 1251 return -EIO; 1252 } 1253 if ((sense[2] == 0xaf) && (sense[3] == 0xfe)) { 1254 QETH_CARD_TEXT(card, 2, "AFFE"); 1255 return -EIO; 1256 } 1257 if ((!sense[0]) && (!sense[1]) && (!sense[2]) && (!sense[3])) { 1258 QETH_CARD_TEXT(card, 2, "ZEROSEN"); 1259 return 0; 1260 } 1261 QETH_CARD_TEXT(card, 2, "DGENCHK"); 1262 return -EIO; 1263 } 1264 return 0; 1265 } 1266 1267 static int qeth_check_irb_error(struct qeth_card *card, struct ccw_device *cdev, 1268 struct irb *irb) 1269 { 1270 if (!IS_ERR(irb)) 1271 return 0; 1272 1273 switch (PTR_ERR(irb)) { 1274 case -EIO: 1275 QETH_DBF_MESSAGE(2, "i/o-error on channel %x\n", 1276 CCW_DEVID(cdev)); 1277 QETH_CARD_TEXT(card, 2, "ckirberr"); 1278 QETH_CARD_TEXT_(card, 2, " rc%d", -EIO); 1279 return -EIO; 1280 case -ETIMEDOUT: 1281 dev_warn(&cdev->dev, "A hardware operation timed out" 1282 " on the device\n"); 1283 QETH_CARD_TEXT(card, 2, "ckirberr"); 1284 QETH_CARD_TEXT_(card, 2, " rc%d", -ETIMEDOUT); 1285 return -ETIMEDOUT; 1286 default: 1287 QETH_DBF_MESSAGE(2, "unknown error %ld on channel %x\n", 1288 PTR_ERR(irb), CCW_DEVID(cdev)); 1289 QETH_CARD_TEXT(card, 2, "ckirberr"); 1290 QETH_CARD_TEXT(card, 2, " rc???"); 1291 return PTR_ERR(irb); 1292 } 1293 } 1294 1295 static void qeth_irq(struct ccw_device *cdev, unsigned long intparm, 1296 struct irb *irb) 1297 { 1298 int rc; 1299 int cstat, dstat; 1300 struct qeth_cmd_buffer *iob = NULL; 1301 struct ccwgroup_device *gdev; 1302 struct qeth_channel *channel; 1303 struct qeth_card *card; 1304 1305 /* while we hold the ccwdev lock, this stays valid: */ 1306 gdev = dev_get_drvdata(&cdev->dev); 1307 card = dev_get_drvdata(&gdev->dev); 1308 1309 QETH_CARD_TEXT(card, 5, "irq"); 1310 1311 if (card->read.ccwdev == cdev) { 1312 channel = &card->read; 1313 QETH_CARD_TEXT(card, 5, "read"); 1314 } else if (card->write.ccwdev == cdev) { 1315 channel = &card->write; 1316 QETH_CARD_TEXT(card, 5, "write"); 1317 } else { 1318 channel = &card->data; 1319 QETH_CARD_TEXT(card, 5, "data"); 1320 } 1321 1322 if (intparm == 0) { 1323 QETH_CARD_TEXT(card, 5, "irqunsol"); 1324 } else if ((addr_t)intparm != (addr_t)channel->active_cmd) { 1325 QETH_CARD_TEXT(card, 5, "irqunexp"); 1326 1327 dev_err(&cdev->dev, 1328 "Received IRQ with intparm %lx, expected %px\n", 1329 intparm, channel->active_cmd); 1330 if (channel->active_cmd) 1331 qeth_cancel_cmd(channel->active_cmd, -EIO); 1332 } else { 1333 iob = (struct qeth_cmd_buffer *) (addr_t)intparm; 1334 } 1335 1336 channel->active_cmd = NULL; 1337 qeth_unlock_channel(card, channel); 1338 1339 rc = qeth_check_irb_error(card, cdev, irb); 1340 if (rc) { 1341 /* IO was terminated, free its resources. */ 1342 if (iob) 1343 qeth_cancel_cmd(iob, rc); 1344 return; 1345 } 1346 1347 if (irb->scsw.cmd.fctl & SCSW_FCTL_CLEAR_FUNC) { 1348 channel->state = CH_STATE_STOPPED; 1349 wake_up(&card->wait_q); 1350 } 1351 1352 if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) { 1353 channel->state = CH_STATE_HALTED; 1354 wake_up(&card->wait_q); 1355 } 1356 1357 if (iob && (irb->scsw.cmd.fctl & (SCSW_FCTL_CLEAR_FUNC | 1358 SCSW_FCTL_HALT_FUNC))) { 1359 qeth_cancel_cmd(iob, -ECANCELED); 1360 iob = NULL; 1361 } 1362 1363 cstat = irb->scsw.cmd.cstat; 1364 dstat = irb->scsw.cmd.dstat; 1365 1366 if ((dstat & DEV_STAT_UNIT_EXCEP) || 1367 (dstat & DEV_STAT_UNIT_CHECK) || 1368 (cstat)) { 1369 if (irb->esw.esw0.erw.cons) { 1370 dev_warn(&channel->ccwdev->dev, 1371 "The qeth device driver failed to recover " 1372 "an error on the device\n"); 1373 QETH_DBF_MESSAGE(2, "sense data available on channel %x: cstat %#X dstat %#X\n", 1374 CCW_DEVID(channel->ccwdev), cstat, 1375 dstat); 1376 print_hex_dump(KERN_WARNING, "qeth: irb ", 1377 DUMP_PREFIX_OFFSET, 16, 1, irb, 32, 1); 1378 print_hex_dump(KERN_WARNING, "qeth: sense data ", 1379 DUMP_PREFIX_OFFSET, 16, 1, irb->ecw, 32, 1); 1380 } 1381 1382 rc = qeth_get_problem(card, cdev, irb); 1383 if (rc) { 1384 card->read_or_write_problem = 1; 1385 if (iob) 1386 qeth_cancel_cmd(iob, rc); 1387 qeth_clear_ipacmd_list(card); 1388 qeth_schedule_recovery(card); 1389 return; 1390 } 1391 } 1392 1393 if (iob) { 1394 /* sanity check: */ 1395 if (irb->scsw.cmd.count > iob->length) { 1396 qeth_cancel_cmd(iob, -EIO); 1397 return; 1398 } 1399 if (iob->callback) 1400 iob->callback(card, iob, 1401 iob->length - irb->scsw.cmd.count); 1402 } 1403 } 1404 1405 static void qeth_notify_skbs(struct qeth_qdio_out_q *q, 1406 struct qeth_qdio_out_buffer *buf, 1407 enum iucv_tx_notify notification) 1408 { 1409 struct sk_buff *skb; 1410 1411 skb_queue_walk(&buf->skb_list, skb) { 1412 struct sock *sk = skb->sk; 1413 1414 QETH_CARD_TEXT_(q->card, 5, "skbn%d", notification); 1415 QETH_CARD_TEXT_(q->card, 5, "%lx", (long) skb); 1416 if (sk && sk->sk_family == PF_IUCV) 1417 iucv_sk(sk)->sk_txnotify(sk, notification); 1418 } 1419 } 1420 1421 static void qeth_tx_complete_buf(struct qeth_qdio_out_buffer *buf, bool error, 1422 int budget) 1423 { 1424 struct qeth_qdio_out_q *queue = buf->q; 1425 struct sk_buff *skb; 1426 1427 if (atomic_read(&buf->state) == QETH_QDIO_BUF_PENDING) 1428 qeth_notify_skbs(queue, buf, TX_NOTIFY_GENERALERROR); 1429 1430 /* Empty buffer? */ 1431 if (buf->next_element_to_fill == 0) 1432 return; 1433 1434 QETH_TXQ_STAT_INC(queue, bufs); 1435 QETH_TXQ_STAT_ADD(queue, buf_elements, buf->next_element_to_fill); 1436 if (error) { 1437 QETH_TXQ_STAT_ADD(queue, tx_errors, buf->frames); 1438 } else { 1439 QETH_TXQ_STAT_ADD(queue, tx_packets, buf->frames); 1440 QETH_TXQ_STAT_ADD(queue, tx_bytes, buf->bytes); 1441 } 1442 1443 while ((skb = __skb_dequeue(&buf->skb_list)) != NULL) { 1444 unsigned int bytes = qdisc_pkt_len(skb); 1445 bool is_tso = skb_is_gso(skb); 1446 unsigned int packets; 1447 1448 packets = is_tso ? skb_shinfo(skb)->gso_segs : 1; 1449 if (!error) { 1450 if (skb->ip_summed == CHECKSUM_PARTIAL) 1451 QETH_TXQ_STAT_ADD(queue, skbs_csum, packets); 1452 if (skb_is_nonlinear(skb)) 1453 QETH_TXQ_STAT_INC(queue, skbs_sg); 1454 if (is_tso) { 1455 QETH_TXQ_STAT_INC(queue, skbs_tso); 1456 QETH_TXQ_STAT_ADD(queue, tso_bytes, bytes); 1457 } 1458 } 1459 1460 napi_consume_skb(skb, budget); 1461 } 1462 } 1463 1464 static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue, 1465 struct qeth_qdio_out_buffer *buf, 1466 bool error, int budget) 1467 { 1468 int i; 1469 1470 /* is PCI flag set on buffer? */ 1471 if (buf->buffer->element[0].sflags & SBAL_SFLAGS0_PCI_REQ) 1472 atomic_dec(&queue->set_pci_flags_count); 1473 1474 qeth_tx_complete_buf(buf, error, budget); 1475 1476 for (i = 0; i < queue->max_elements; ++i) { 1477 void *data = phys_to_virt(buf->buffer->element[i].addr); 1478 1479 if (data && buf->is_header[i]) 1480 kmem_cache_free(qeth_core_header_cache, data); 1481 buf->is_header[i] = 0; 1482 } 1483 1484 qeth_scrub_qdio_buffer(buf->buffer, queue->max_elements); 1485 buf->next_element_to_fill = 0; 1486 buf->frames = 0; 1487 buf->bytes = 0; 1488 atomic_set(&buf->state, QETH_QDIO_BUF_EMPTY); 1489 } 1490 1491 static void qeth_drain_output_queue(struct qeth_qdio_out_q *q, bool free) 1492 { 1493 int j; 1494 1495 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) { 1496 if (!q->bufs[j]) 1497 continue; 1498 qeth_cleanup_handled_pending(q, j, 1); 1499 qeth_clear_output_buffer(q, q->bufs[j], true, 0); 1500 if (free) { 1501 kmem_cache_free(qeth_qdio_outbuf_cache, q->bufs[j]); 1502 q->bufs[j] = NULL; 1503 } 1504 } 1505 } 1506 1507 static void qeth_drain_output_queues(struct qeth_card *card) 1508 { 1509 int i; 1510 1511 QETH_CARD_TEXT(card, 2, "clearqdbf"); 1512 /* clear outbound buffers to free skbs */ 1513 for (i = 0; i < card->qdio.no_out_queues; ++i) { 1514 if (card->qdio.out_qs[i]) 1515 qeth_drain_output_queue(card->qdio.out_qs[i], false); 1516 } 1517 } 1518 1519 static void qeth_osa_set_output_queues(struct qeth_card *card, bool single) 1520 { 1521 unsigned int max = single ? 1 : card->dev->num_tx_queues; 1522 1523 if (card->qdio.no_out_queues == max) 1524 return; 1525 1526 if (atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED) 1527 qeth_free_qdio_queues(card); 1528 1529 if (max == 1 && card->qdio.do_prio_queueing != QETH_PRIOQ_DEFAULT) 1530 dev_info(&card->gdev->dev, "Priority Queueing not supported\n"); 1531 1532 card->qdio.no_out_queues = max; 1533 } 1534 1535 static int qeth_update_from_chp_desc(struct qeth_card *card) 1536 { 1537 struct ccw_device *ccwdev; 1538 struct channel_path_desc_fmt0 *chp_dsc; 1539 1540 QETH_CARD_TEXT(card, 2, "chp_desc"); 1541 1542 ccwdev = card->data.ccwdev; 1543 chp_dsc = ccw_device_get_chp_desc(ccwdev, 0); 1544 if (!chp_dsc) 1545 return -ENOMEM; 1546 1547 card->info.func_level = 0x4100 + chp_dsc->desc; 1548 1549 if (IS_OSD(card) || IS_OSX(card)) 1550 /* CHPP field bit 6 == 1 -> single queue */ 1551 qeth_osa_set_output_queues(card, chp_dsc->chpp & 0x02); 1552 1553 kfree(chp_dsc); 1554 QETH_CARD_TEXT_(card, 2, "nr:%x", card->qdio.no_out_queues); 1555 QETH_CARD_TEXT_(card, 2, "lvl:%02x", card->info.func_level); 1556 return 0; 1557 } 1558 1559 static void qeth_init_qdio_info(struct qeth_card *card) 1560 { 1561 QETH_CARD_TEXT(card, 4, "intqdinf"); 1562 atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED); 1563 card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT; 1564 card->qdio.default_out_queue = QETH_DEFAULT_QUEUE; 1565 1566 /* inbound */ 1567 card->qdio.no_in_queues = 1; 1568 card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT; 1569 if (IS_IQD(card)) 1570 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_HSDEFAULT; 1571 else 1572 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_DEFAULT; 1573 card->qdio.in_buf_pool.buf_count = card->qdio.init_pool.buf_count; 1574 INIT_LIST_HEAD(&card->qdio.in_buf_pool.entry_list); 1575 INIT_LIST_HEAD(&card->qdio.init_pool.entry_list); 1576 } 1577 1578 static void qeth_set_initial_options(struct qeth_card *card) 1579 { 1580 card->options.route4.type = NO_ROUTER; 1581 card->options.route6.type = NO_ROUTER; 1582 card->options.isolation = ISOLATION_MODE_NONE; 1583 card->options.cq = QETH_CQ_DISABLED; 1584 card->options.layer = QETH_DISCIPLINE_UNDETERMINED; 1585 } 1586 1587 static int qeth_do_start_thread(struct qeth_card *card, unsigned long thread) 1588 { 1589 unsigned long flags; 1590 int rc = 0; 1591 1592 spin_lock_irqsave(&card->thread_mask_lock, flags); 1593 QETH_CARD_TEXT_(card, 4, " %02x%02x%02x", 1594 (u8) card->thread_start_mask, 1595 (u8) card->thread_allowed_mask, 1596 (u8) card->thread_running_mask); 1597 rc = (card->thread_start_mask & thread); 1598 spin_unlock_irqrestore(&card->thread_mask_lock, flags); 1599 return rc; 1600 } 1601 1602 static int qeth_do_reset(void *data); 1603 static void qeth_start_kernel_thread(struct work_struct *work) 1604 { 1605 struct task_struct *ts; 1606 struct qeth_card *card = container_of(work, struct qeth_card, 1607 kernel_thread_starter); 1608 QETH_CARD_TEXT(card, 2, "strthrd"); 1609 1610 if (card->read.state != CH_STATE_UP && 1611 card->write.state != CH_STATE_UP) 1612 return; 1613 if (qeth_do_start_thread(card, QETH_RECOVER_THREAD)) { 1614 ts = kthread_run(qeth_do_reset, card, "qeth_recover"); 1615 if (IS_ERR(ts)) { 1616 qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD); 1617 qeth_clear_thread_running_bit(card, 1618 QETH_RECOVER_THREAD); 1619 } 1620 } 1621 } 1622 1623 static void qeth_buffer_reclaim_work(struct work_struct *); 1624 static void qeth_setup_card(struct qeth_card *card) 1625 { 1626 QETH_CARD_TEXT(card, 2, "setupcrd"); 1627 1628 card->info.type = CARD_RDEV(card)->id.driver_info; 1629 card->state = CARD_STATE_DOWN; 1630 spin_lock_init(&card->lock); 1631 spin_lock_init(&card->thread_mask_lock); 1632 mutex_init(&card->conf_mutex); 1633 mutex_init(&card->discipline_mutex); 1634 INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread); 1635 INIT_LIST_HEAD(&card->cmd_waiter_list); 1636 init_waitqueue_head(&card->wait_q); 1637 qeth_set_initial_options(card); 1638 /* IP address takeover */ 1639 INIT_LIST_HEAD(&card->ipato.entries); 1640 qeth_init_qdio_info(card); 1641 INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work); 1642 INIT_WORK(&card->close_dev_work, qeth_close_dev_handler); 1643 hash_init(card->rx_mode_addrs); 1644 hash_init(card->local_addrs4); 1645 hash_init(card->local_addrs6); 1646 spin_lock_init(&card->local_addrs4_lock); 1647 spin_lock_init(&card->local_addrs6_lock); 1648 } 1649 1650 static void qeth_core_sl_print(struct seq_file *m, struct service_level *slr) 1651 { 1652 struct qeth_card *card = container_of(slr, struct qeth_card, 1653 qeth_service_level); 1654 if (card->info.mcl_level[0]) 1655 seq_printf(m, "qeth: %s firmware level %s\n", 1656 CARD_BUS_ID(card), card->info.mcl_level); 1657 } 1658 1659 static struct qeth_card *qeth_alloc_card(struct ccwgroup_device *gdev) 1660 { 1661 struct qeth_card *card; 1662 1663 QETH_DBF_TEXT(SETUP, 2, "alloccrd"); 1664 card = kzalloc(sizeof(*card), GFP_KERNEL); 1665 if (!card) 1666 goto out; 1667 QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *)); 1668 1669 card->gdev = gdev; 1670 dev_set_drvdata(&gdev->dev, card); 1671 CARD_RDEV(card) = gdev->cdev[0]; 1672 CARD_WDEV(card) = gdev->cdev[1]; 1673 CARD_DDEV(card) = gdev->cdev[2]; 1674 1675 card->event_wq = alloc_ordered_workqueue("%s_event", 0, 1676 dev_name(&gdev->dev)); 1677 if (!card->event_wq) 1678 goto out_wq; 1679 1680 card->read_cmd = qeth_alloc_cmd(&card->read, QETH_BUFSIZE, 1, 0); 1681 if (!card->read_cmd) 1682 goto out_read_cmd; 1683 1684 card->debugfs = debugfs_create_dir(dev_name(&gdev->dev), 1685 qeth_debugfs_root); 1686 debugfs_create_file("local_addrs", 0400, card->debugfs, card, 1687 &qeth_debugfs_local_addr_fops); 1688 1689 card->qeth_service_level.seq_print = qeth_core_sl_print; 1690 register_service_level(&card->qeth_service_level); 1691 return card; 1692 1693 out_read_cmd: 1694 destroy_workqueue(card->event_wq); 1695 out_wq: 1696 dev_set_drvdata(&gdev->dev, NULL); 1697 kfree(card); 1698 out: 1699 return NULL; 1700 } 1701 1702 static int qeth_clear_channel(struct qeth_card *card, 1703 struct qeth_channel *channel) 1704 { 1705 int rc; 1706 1707 QETH_CARD_TEXT(card, 3, "clearch"); 1708 spin_lock_irq(get_ccwdev_lock(channel->ccwdev)); 1709 rc = ccw_device_clear(channel->ccwdev, (addr_t)channel->active_cmd); 1710 spin_unlock_irq(get_ccwdev_lock(channel->ccwdev)); 1711 1712 if (rc) 1713 return rc; 1714 rc = wait_event_interruptible_timeout(card->wait_q, 1715 channel->state == CH_STATE_STOPPED, QETH_TIMEOUT); 1716 if (rc == -ERESTARTSYS) 1717 return rc; 1718 if (channel->state != CH_STATE_STOPPED) 1719 return -ETIME; 1720 channel->state = CH_STATE_DOWN; 1721 return 0; 1722 } 1723 1724 static int qeth_halt_channel(struct qeth_card *card, 1725 struct qeth_channel *channel) 1726 { 1727 int rc; 1728 1729 QETH_CARD_TEXT(card, 3, "haltch"); 1730 spin_lock_irq(get_ccwdev_lock(channel->ccwdev)); 1731 rc = ccw_device_halt(channel->ccwdev, (addr_t)channel->active_cmd); 1732 spin_unlock_irq(get_ccwdev_lock(channel->ccwdev)); 1733 1734 if (rc) 1735 return rc; 1736 rc = wait_event_interruptible_timeout(card->wait_q, 1737 channel->state == CH_STATE_HALTED, QETH_TIMEOUT); 1738 if (rc == -ERESTARTSYS) 1739 return rc; 1740 if (channel->state != CH_STATE_HALTED) 1741 return -ETIME; 1742 return 0; 1743 } 1744 1745 static int qeth_stop_channel(struct qeth_channel *channel) 1746 { 1747 struct ccw_device *cdev = channel->ccwdev; 1748 int rc; 1749 1750 rc = ccw_device_set_offline(cdev); 1751 1752 spin_lock_irq(get_ccwdev_lock(cdev)); 1753 if (channel->active_cmd) { 1754 dev_err(&cdev->dev, "Stopped channel while cmd %px was still active\n", 1755 channel->active_cmd); 1756 channel->active_cmd = NULL; 1757 } 1758 cdev->handler = NULL; 1759 spin_unlock_irq(get_ccwdev_lock(cdev)); 1760 1761 return rc; 1762 } 1763 1764 static int qeth_start_channel(struct qeth_channel *channel) 1765 { 1766 struct ccw_device *cdev = channel->ccwdev; 1767 int rc; 1768 1769 channel->state = CH_STATE_DOWN; 1770 atomic_set(&channel->irq_pending, 0); 1771 1772 spin_lock_irq(get_ccwdev_lock(cdev)); 1773 cdev->handler = qeth_irq; 1774 spin_unlock_irq(get_ccwdev_lock(cdev)); 1775 1776 rc = ccw_device_set_online(cdev); 1777 if (rc) 1778 goto err; 1779 1780 return 0; 1781 1782 err: 1783 spin_lock_irq(get_ccwdev_lock(cdev)); 1784 cdev->handler = NULL; 1785 spin_unlock_irq(get_ccwdev_lock(cdev)); 1786 return rc; 1787 } 1788 1789 static int qeth_halt_channels(struct qeth_card *card) 1790 { 1791 int rc1 = 0, rc2 = 0, rc3 = 0; 1792 1793 QETH_CARD_TEXT(card, 3, "haltchs"); 1794 rc1 = qeth_halt_channel(card, &card->read); 1795 rc2 = qeth_halt_channel(card, &card->write); 1796 rc3 = qeth_halt_channel(card, &card->data); 1797 if (rc1) 1798 return rc1; 1799 if (rc2) 1800 return rc2; 1801 return rc3; 1802 } 1803 1804 static int qeth_clear_channels(struct qeth_card *card) 1805 { 1806 int rc1 = 0, rc2 = 0, rc3 = 0; 1807 1808 QETH_CARD_TEXT(card, 3, "clearchs"); 1809 rc1 = qeth_clear_channel(card, &card->read); 1810 rc2 = qeth_clear_channel(card, &card->write); 1811 rc3 = qeth_clear_channel(card, &card->data); 1812 if (rc1) 1813 return rc1; 1814 if (rc2) 1815 return rc2; 1816 return rc3; 1817 } 1818 1819 static int qeth_clear_halt_card(struct qeth_card *card, int halt) 1820 { 1821 int rc = 0; 1822 1823 QETH_CARD_TEXT(card, 3, "clhacrd"); 1824 1825 if (halt) 1826 rc = qeth_halt_channels(card); 1827 if (rc) 1828 return rc; 1829 return qeth_clear_channels(card); 1830 } 1831 1832 static int qeth_qdio_clear_card(struct qeth_card *card, int use_halt) 1833 { 1834 int rc = 0; 1835 1836 QETH_CARD_TEXT(card, 3, "qdioclr"); 1837 switch (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ESTABLISHED, 1838 QETH_QDIO_CLEANING)) { 1839 case QETH_QDIO_ESTABLISHED: 1840 if (IS_IQD(card)) 1841 rc = qdio_shutdown(CARD_DDEV(card), 1842 QDIO_FLAG_CLEANUP_USING_HALT); 1843 else 1844 rc = qdio_shutdown(CARD_DDEV(card), 1845 QDIO_FLAG_CLEANUP_USING_CLEAR); 1846 if (rc) 1847 QETH_CARD_TEXT_(card, 3, "1err%d", rc); 1848 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED); 1849 break; 1850 case QETH_QDIO_CLEANING: 1851 return rc; 1852 default: 1853 break; 1854 } 1855 rc = qeth_clear_halt_card(card, use_halt); 1856 if (rc) 1857 QETH_CARD_TEXT_(card, 3, "2err%d", rc); 1858 return rc; 1859 } 1860 1861 static enum qeth_discipline_id qeth_vm_detect_layer(struct qeth_card *card) 1862 { 1863 enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED; 1864 struct diag26c_vnic_resp *response = NULL; 1865 struct diag26c_vnic_req *request = NULL; 1866 struct ccw_dev_id id; 1867 char userid[80]; 1868 int rc = 0; 1869 1870 QETH_CARD_TEXT(card, 2, "vmlayer"); 1871 1872 cpcmd("QUERY USERID", userid, sizeof(userid), &rc); 1873 if (rc) 1874 goto out; 1875 1876 request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA); 1877 response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA); 1878 if (!request || !response) { 1879 rc = -ENOMEM; 1880 goto out; 1881 } 1882 1883 ccw_device_get_id(CARD_RDEV(card), &id); 1884 request->resp_buf_len = sizeof(*response); 1885 request->resp_version = DIAG26C_VERSION6_VM65918; 1886 request->req_format = DIAG26C_VNIC_INFO; 1887 ASCEBC(userid, 8); 1888 memcpy(&request->sys_name, userid, 8); 1889 request->devno = id.devno; 1890 1891 QETH_DBF_HEX(CTRL, 2, request, sizeof(*request)); 1892 rc = diag26c(request, response, DIAG26C_PORT_VNIC); 1893 QETH_DBF_HEX(CTRL, 2, request, sizeof(*request)); 1894 if (rc) 1895 goto out; 1896 QETH_DBF_HEX(CTRL, 2, response, sizeof(*response)); 1897 1898 if (request->resp_buf_len < sizeof(*response) || 1899 response->version != request->resp_version) { 1900 rc = -EIO; 1901 goto out; 1902 } 1903 1904 if (response->protocol == VNIC_INFO_PROT_L2) 1905 disc = QETH_DISCIPLINE_LAYER2; 1906 else if (response->protocol == VNIC_INFO_PROT_L3) 1907 disc = QETH_DISCIPLINE_LAYER3; 1908 1909 out: 1910 kfree(response); 1911 kfree(request); 1912 if (rc) 1913 QETH_CARD_TEXT_(card, 2, "err%x", rc); 1914 return disc; 1915 } 1916 1917 /* Determine whether the device requires a specific layer discipline */ 1918 static enum qeth_discipline_id qeth_enforce_discipline(struct qeth_card *card) 1919 { 1920 enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED; 1921 1922 if (IS_OSM(card) || IS_OSN(card)) 1923 disc = QETH_DISCIPLINE_LAYER2; 1924 else if (IS_VM_NIC(card)) 1925 disc = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 : 1926 qeth_vm_detect_layer(card); 1927 1928 switch (disc) { 1929 case QETH_DISCIPLINE_LAYER2: 1930 QETH_CARD_TEXT(card, 3, "force l2"); 1931 break; 1932 case QETH_DISCIPLINE_LAYER3: 1933 QETH_CARD_TEXT(card, 3, "force l3"); 1934 break; 1935 default: 1936 QETH_CARD_TEXT(card, 3, "force no"); 1937 } 1938 1939 return disc; 1940 } 1941 1942 static void qeth_set_blkt_defaults(struct qeth_card *card) 1943 { 1944 QETH_CARD_TEXT(card, 2, "cfgblkt"); 1945 1946 if (card->info.use_v1_blkt) { 1947 card->info.blkt.time_total = 0; 1948 card->info.blkt.inter_packet = 0; 1949 card->info.blkt.inter_packet_jumbo = 0; 1950 } else { 1951 card->info.blkt.time_total = 250; 1952 card->info.blkt.inter_packet = 5; 1953 card->info.blkt.inter_packet_jumbo = 15; 1954 } 1955 } 1956 1957 static void qeth_idx_init(struct qeth_card *card) 1958 { 1959 memset(&card->seqno, 0, sizeof(card->seqno)); 1960 1961 card->token.issuer_rm_w = 0x00010103UL; 1962 card->token.cm_filter_w = 0x00010108UL; 1963 card->token.cm_connection_w = 0x0001010aUL; 1964 card->token.ulp_filter_w = 0x0001010bUL; 1965 card->token.ulp_connection_w = 0x0001010dUL; 1966 1967 switch (card->info.type) { 1968 case QETH_CARD_TYPE_IQD: 1969 card->info.func_level = QETH_IDX_FUNC_LEVEL_IQD; 1970 break; 1971 case QETH_CARD_TYPE_OSD: 1972 case QETH_CARD_TYPE_OSN: 1973 card->info.func_level = QETH_IDX_FUNC_LEVEL_OSD; 1974 break; 1975 default: 1976 break; 1977 } 1978 } 1979 1980 static void qeth_idx_finalize_cmd(struct qeth_card *card, 1981 struct qeth_cmd_buffer *iob) 1982 { 1983 memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data), &card->seqno.trans_hdr, 1984 QETH_SEQ_NO_LENGTH); 1985 if (iob->channel == &card->write) 1986 card->seqno.trans_hdr++; 1987 } 1988 1989 static int qeth_peer_func_level(int level) 1990 { 1991 if ((level & 0xff) == 8) 1992 return (level & 0xff) + 0x400; 1993 if (((level >> 8) & 3) == 1) 1994 return (level & 0xff) + 0x200; 1995 return level; 1996 } 1997 1998 static void qeth_mpc_finalize_cmd(struct qeth_card *card, 1999 struct qeth_cmd_buffer *iob) 2000 { 2001 qeth_idx_finalize_cmd(card, iob); 2002 2003 memcpy(QETH_PDU_HEADER_SEQ_NO(iob->data), 2004 &card->seqno.pdu_hdr, QETH_SEQ_NO_LENGTH); 2005 card->seqno.pdu_hdr++; 2006 memcpy(QETH_PDU_HEADER_ACK_SEQ_NO(iob->data), 2007 &card->seqno.pdu_hdr_ack, QETH_SEQ_NO_LENGTH); 2008 2009 iob->callback = qeth_release_buffer_cb; 2010 } 2011 2012 static bool qeth_mpc_match_reply(struct qeth_cmd_buffer *iob, 2013 struct qeth_cmd_buffer *reply) 2014 { 2015 /* MPC cmds are issued strictly in sequence. */ 2016 return !IS_IPA(reply->data); 2017 } 2018 2019 static struct qeth_cmd_buffer *qeth_mpc_alloc_cmd(struct qeth_card *card, 2020 const void *data, 2021 unsigned int data_length) 2022 { 2023 struct qeth_cmd_buffer *iob; 2024 2025 iob = qeth_alloc_cmd(&card->write, data_length, 1, QETH_TIMEOUT); 2026 if (!iob) 2027 return NULL; 2028 2029 memcpy(iob->data, data, data_length); 2030 qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, data_length, 2031 iob->data); 2032 iob->finalize = qeth_mpc_finalize_cmd; 2033 iob->match = qeth_mpc_match_reply; 2034 return iob; 2035 } 2036 2037 /** 2038 * qeth_send_control_data() - send control command to the card 2039 * @card: qeth_card structure pointer 2040 * @iob: qeth_cmd_buffer pointer 2041 * @reply_cb: callback function pointer 2042 * @cb_card: pointer to the qeth_card structure 2043 * @cb_reply: pointer to the qeth_reply structure 2044 * @cb_cmd: pointer to the original iob for non-IPA 2045 * commands, or to the qeth_ipa_cmd structure 2046 * for the IPA commands. 2047 * @reply_param: private pointer passed to the callback 2048 * 2049 * Callback function gets called one or more times, with cb_cmd 2050 * pointing to the response returned by the hardware. Callback 2051 * function must return 2052 * > 0 if more reply blocks are expected, 2053 * 0 if the last or only reply block is received, and 2054 * < 0 on error. 2055 * Callback function can get the value of the reply_param pointer from the 2056 * field 'param' of the structure qeth_reply. 2057 */ 2058 2059 static int qeth_send_control_data(struct qeth_card *card, 2060 struct qeth_cmd_buffer *iob, 2061 int (*reply_cb)(struct qeth_card *cb_card, 2062 struct qeth_reply *cb_reply, 2063 unsigned long cb_cmd), 2064 void *reply_param) 2065 { 2066 struct qeth_channel *channel = iob->channel; 2067 struct qeth_reply *reply = &iob->reply; 2068 long timeout = iob->timeout; 2069 int rc; 2070 2071 QETH_CARD_TEXT(card, 2, "sendctl"); 2072 2073 reply->callback = reply_cb; 2074 reply->param = reply_param; 2075 2076 timeout = wait_event_interruptible_timeout(card->wait_q, 2077 qeth_trylock_channel(channel), 2078 timeout); 2079 if (timeout <= 0) { 2080 qeth_put_cmd(iob); 2081 return (timeout == -ERESTARTSYS) ? -EINTR : -ETIME; 2082 } 2083 2084 if (iob->finalize) 2085 iob->finalize(card, iob); 2086 QETH_DBF_HEX(CTRL, 2, iob->data, min(iob->length, QETH_DBF_CTRL_LEN)); 2087 2088 qeth_enqueue_cmd(card, iob); 2089 2090 /* This pairs with iob->callback, and keeps the iob alive after IO: */ 2091 qeth_get_cmd(iob); 2092 2093 QETH_CARD_TEXT(card, 6, "noirqpnd"); 2094 spin_lock_irq(get_ccwdev_lock(channel->ccwdev)); 2095 rc = ccw_device_start_timeout(channel->ccwdev, __ccw_from_cmd(iob), 2096 (addr_t) iob, 0, 0, timeout); 2097 if (!rc) 2098 channel->active_cmd = iob; 2099 spin_unlock_irq(get_ccwdev_lock(channel->ccwdev)); 2100 if (rc) { 2101 QETH_DBF_MESSAGE(2, "qeth_send_control_data on device %x: ccw_device_start rc = %i\n", 2102 CARD_DEVID(card), rc); 2103 QETH_CARD_TEXT_(card, 2, " err%d", rc); 2104 qeth_dequeue_cmd(card, iob); 2105 qeth_put_cmd(iob); 2106 qeth_unlock_channel(card, channel); 2107 goto out; 2108 } 2109 2110 timeout = wait_for_completion_interruptible_timeout(&iob->done, 2111 timeout); 2112 if (timeout <= 0) 2113 rc = (timeout == -ERESTARTSYS) ? -EINTR : -ETIME; 2114 2115 qeth_dequeue_cmd(card, iob); 2116 2117 if (reply_cb) { 2118 /* Wait until the callback for a late reply has completed: */ 2119 spin_lock_irq(&iob->lock); 2120 if (rc) 2121 /* Zap any callback that's still pending: */ 2122 iob->rc = rc; 2123 spin_unlock_irq(&iob->lock); 2124 } 2125 2126 if (!rc) 2127 rc = iob->rc; 2128 2129 out: 2130 qeth_put_cmd(iob); 2131 return rc; 2132 } 2133 2134 struct qeth_node_desc { 2135 struct node_descriptor nd1; 2136 struct node_descriptor nd2; 2137 struct node_descriptor nd3; 2138 }; 2139 2140 static void qeth_read_conf_data_cb(struct qeth_card *card, 2141 struct qeth_cmd_buffer *iob, 2142 unsigned int data_length) 2143 { 2144 struct qeth_node_desc *nd = (struct qeth_node_desc *) iob->data; 2145 int rc = 0; 2146 u8 *tag; 2147 2148 QETH_CARD_TEXT(card, 2, "cfgunit"); 2149 2150 if (data_length < sizeof(*nd)) { 2151 rc = -EINVAL; 2152 goto out; 2153 } 2154 2155 card->info.is_vm_nic = nd->nd1.plant[0] == _ascebc['V'] && 2156 nd->nd1.plant[1] == _ascebc['M']; 2157 tag = (u8 *)&nd->nd1.tag; 2158 card->info.chpid = tag[0]; 2159 card->info.unit_addr2 = tag[1]; 2160 2161 tag = (u8 *)&nd->nd2.tag; 2162 card->info.cula = tag[1]; 2163 2164 card->info.use_v1_blkt = nd->nd3.model[0] == 0xF0 && 2165 nd->nd3.model[1] == 0xF0 && 2166 nd->nd3.model[2] >= 0xF1 && 2167 nd->nd3.model[2] <= 0xF4; 2168 2169 out: 2170 qeth_notify_cmd(iob, rc); 2171 qeth_put_cmd(iob); 2172 } 2173 2174 static int qeth_read_conf_data(struct qeth_card *card) 2175 { 2176 struct qeth_channel *channel = &card->data; 2177 struct qeth_cmd_buffer *iob; 2178 struct ciw *ciw; 2179 2180 /* scan for RCD command in extended SenseID data */ 2181 ciw = ccw_device_get_ciw(channel->ccwdev, CIW_TYPE_RCD); 2182 if (!ciw || ciw->cmd == 0) 2183 return -EOPNOTSUPP; 2184 if (ciw->count < sizeof(struct qeth_node_desc)) 2185 return -EINVAL; 2186 2187 iob = qeth_alloc_cmd(channel, ciw->count, 1, QETH_RCD_TIMEOUT); 2188 if (!iob) 2189 return -ENOMEM; 2190 2191 iob->callback = qeth_read_conf_data_cb; 2192 qeth_setup_ccw(__ccw_from_cmd(iob), ciw->cmd, 0, iob->length, 2193 iob->data); 2194 2195 return qeth_send_control_data(card, iob, NULL, NULL); 2196 } 2197 2198 static int qeth_idx_check_activate_response(struct qeth_card *card, 2199 struct qeth_channel *channel, 2200 struct qeth_cmd_buffer *iob) 2201 { 2202 int rc; 2203 2204 rc = qeth_check_idx_response(card, iob->data); 2205 if (rc) 2206 return rc; 2207 2208 if (QETH_IS_IDX_ACT_POS_REPLY(iob->data)) 2209 return 0; 2210 2211 /* negative reply: */ 2212 QETH_CARD_TEXT_(card, 2, "idxneg%c", 2213 QETH_IDX_ACT_CAUSE_CODE(iob->data)); 2214 2215 switch (QETH_IDX_ACT_CAUSE_CODE(iob->data)) { 2216 case QETH_IDX_ACT_ERR_EXCL: 2217 dev_err(&channel->ccwdev->dev, 2218 "The adapter is used exclusively by another host\n"); 2219 return -EBUSY; 2220 case QETH_IDX_ACT_ERR_AUTH: 2221 case QETH_IDX_ACT_ERR_AUTH_USER: 2222 dev_err(&channel->ccwdev->dev, 2223 "Setting the device online failed because of insufficient authorization\n"); 2224 return -EPERM; 2225 default: 2226 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: negative reply\n", 2227 CCW_DEVID(channel->ccwdev)); 2228 return -EIO; 2229 } 2230 } 2231 2232 static void qeth_idx_activate_read_channel_cb(struct qeth_card *card, 2233 struct qeth_cmd_buffer *iob, 2234 unsigned int data_length) 2235 { 2236 struct qeth_channel *channel = iob->channel; 2237 u16 peer_level; 2238 int rc; 2239 2240 QETH_CARD_TEXT(card, 2, "idxrdcb"); 2241 2242 rc = qeth_idx_check_activate_response(card, channel, iob); 2243 if (rc) 2244 goto out; 2245 2246 memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2); 2247 if (peer_level != qeth_peer_func_level(card->info.func_level)) { 2248 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n", 2249 CCW_DEVID(channel->ccwdev), 2250 card->info.func_level, peer_level); 2251 rc = -EINVAL; 2252 goto out; 2253 } 2254 2255 memcpy(&card->token.issuer_rm_r, 2256 QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data), 2257 QETH_MPC_TOKEN_LENGTH); 2258 memcpy(&card->info.mcl_level[0], 2259 QETH_IDX_REPLY_LEVEL(iob->data), QETH_MCL_LENGTH); 2260 2261 out: 2262 qeth_notify_cmd(iob, rc); 2263 qeth_put_cmd(iob); 2264 } 2265 2266 static void qeth_idx_activate_write_channel_cb(struct qeth_card *card, 2267 struct qeth_cmd_buffer *iob, 2268 unsigned int data_length) 2269 { 2270 struct qeth_channel *channel = iob->channel; 2271 u16 peer_level; 2272 int rc; 2273 2274 QETH_CARD_TEXT(card, 2, "idxwrcb"); 2275 2276 rc = qeth_idx_check_activate_response(card, channel, iob); 2277 if (rc) 2278 goto out; 2279 2280 memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2); 2281 if ((peer_level & ~0x0100) != 2282 qeth_peer_func_level(card->info.func_level)) { 2283 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n", 2284 CCW_DEVID(channel->ccwdev), 2285 card->info.func_level, peer_level); 2286 rc = -EINVAL; 2287 } 2288 2289 out: 2290 qeth_notify_cmd(iob, rc); 2291 qeth_put_cmd(iob); 2292 } 2293 2294 static void qeth_idx_setup_activate_cmd(struct qeth_card *card, 2295 struct qeth_cmd_buffer *iob) 2296 { 2297 u16 addr = (card->info.cula << 8) + card->info.unit_addr2; 2298 u8 port = ((u8)card->dev->dev_port) | 0x80; 2299 struct ccw1 *ccw = __ccw_from_cmd(iob); 2300 2301 qeth_setup_ccw(&ccw[0], CCW_CMD_WRITE, CCW_FLAG_CC, IDX_ACTIVATE_SIZE, 2302 iob->data); 2303 qeth_setup_ccw(&ccw[1], CCW_CMD_READ, 0, iob->length, iob->data); 2304 iob->finalize = qeth_idx_finalize_cmd; 2305 2306 port |= QETH_IDX_ACT_INVAL_FRAME; 2307 memcpy(QETH_IDX_ACT_PNO(iob->data), &port, 1); 2308 memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data), 2309 &card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH); 2310 memcpy(QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2311 &card->info.func_level, 2); 2312 memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &card->info.ddev_devno, 2); 2313 memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &addr, 2); 2314 } 2315 2316 static int qeth_idx_activate_read_channel(struct qeth_card *card) 2317 { 2318 struct qeth_channel *channel = &card->read; 2319 struct qeth_cmd_buffer *iob; 2320 int rc; 2321 2322 QETH_CARD_TEXT(card, 2, "idxread"); 2323 2324 iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT); 2325 if (!iob) 2326 return -ENOMEM; 2327 2328 memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE); 2329 qeth_idx_setup_activate_cmd(card, iob); 2330 iob->callback = qeth_idx_activate_read_channel_cb; 2331 2332 rc = qeth_send_control_data(card, iob, NULL, NULL); 2333 if (rc) 2334 return rc; 2335 2336 channel->state = CH_STATE_UP; 2337 return 0; 2338 } 2339 2340 static int qeth_idx_activate_write_channel(struct qeth_card *card) 2341 { 2342 struct qeth_channel *channel = &card->write; 2343 struct qeth_cmd_buffer *iob; 2344 int rc; 2345 2346 QETH_CARD_TEXT(card, 2, "idxwrite"); 2347 2348 iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT); 2349 if (!iob) 2350 return -ENOMEM; 2351 2352 memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE); 2353 qeth_idx_setup_activate_cmd(card, iob); 2354 iob->callback = qeth_idx_activate_write_channel_cb; 2355 2356 rc = qeth_send_control_data(card, iob, NULL, NULL); 2357 if (rc) 2358 return rc; 2359 2360 channel->state = CH_STATE_UP; 2361 return 0; 2362 } 2363 2364 static int qeth_cm_enable_cb(struct qeth_card *card, struct qeth_reply *reply, 2365 unsigned long data) 2366 { 2367 struct qeth_cmd_buffer *iob; 2368 2369 QETH_CARD_TEXT(card, 2, "cmenblcb"); 2370 2371 iob = (struct qeth_cmd_buffer *) data; 2372 memcpy(&card->token.cm_filter_r, 2373 QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data), 2374 QETH_MPC_TOKEN_LENGTH); 2375 return 0; 2376 } 2377 2378 static int qeth_cm_enable(struct qeth_card *card) 2379 { 2380 struct qeth_cmd_buffer *iob; 2381 2382 QETH_CARD_TEXT(card, 2, "cmenable"); 2383 2384 iob = qeth_mpc_alloc_cmd(card, CM_ENABLE, CM_ENABLE_SIZE); 2385 if (!iob) 2386 return -ENOMEM; 2387 2388 memcpy(QETH_CM_ENABLE_ISSUER_RM_TOKEN(iob->data), 2389 &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH); 2390 memcpy(QETH_CM_ENABLE_FILTER_TOKEN(iob->data), 2391 &card->token.cm_filter_w, QETH_MPC_TOKEN_LENGTH); 2392 2393 return qeth_send_control_data(card, iob, qeth_cm_enable_cb, NULL); 2394 } 2395 2396 static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply, 2397 unsigned long data) 2398 { 2399 struct qeth_cmd_buffer *iob; 2400 2401 QETH_CARD_TEXT(card, 2, "cmsetpcb"); 2402 2403 iob = (struct qeth_cmd_buffer *) data; 2404 memcpy(&card->token.cm_connection_r, 2405 QETH_CM_SETUP_RESP_DEST_ADDR(iob->data), 2406 QETH_MPC_TOKEN_LENGTH); 2407 return 0; 2408 } 2409 2410 static int qeth_cm_setup(struct qeth_card *card) 2411 { 2412 struct qeth_cmd_buffer *iob; 2413 2414 QETH_CARD_TEXT(card, 2, "cmsetup"); 2415 2416 iob = qeth_mpc_alloc_cmd(card, CM_SETUP, CM_SETUP_SIZE); 2417 if (!iob) 2418 return -ENOMEM; 2419 2420 memcpy(QETH_CM_SETUP_DEST_ADDR(iob->data), 2421 &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH); 2422 memcpy(QETH_CM_SETUP_CONNECTION_TOKEN(iob->data), 2423 &card->token.cm_connection_w, QETH_MPC_TOKEN_LENGTH); 2424 memcpy(QETH_CM_SETUP_FILTER_TOKEN(iob->data), 2425 &card->token.cm_filter_r, QETH_MPC_TOKEN_LENGTH); 2426 return qeth_send_control_data(card, iob, qeth_cm_setup_cb, NULL); 2427 } 2428 2429 static bool qeth_is_supported_link_type(struct qeth_card *card, u8 link_type) 2430 { 2431 if (link_type == QETH_LINK_TYPE_LANE_TR || 2432 link_type == QETH_LINK_TYPE_HSTR) { 2433 dev_err(&card->gdev->dev, "Unsupported Token Ring device\n"); 2434 return false; 2435 } 2436 2437 return true; 2438 } 2439 2440 static int qeth_update_max_mtu(struct qeth_card *card, unsigned int max_mtu) 2441 { 2442 struct net_device *dev = card->dev; 2443 unsigned int new_mtu; 2444 2445 if (!max_mtu) { 2446 /* IQD needs accurate max MTU to set up its RX buffers: */ 2447 if (IS_IQD(card)) 2448 return -EINVAL; 2449 /* tolerate quirky HW: */ 2450 max_mtu = ETH_MAX_MTU; 2451 } 2452 2453 rtnl_lock(); 2454 if (IS_IQD(card)) { 2455 /* move any device with default MTU to new max MTU: */ 2456 new_mtu = (dev->mtu == dev->max_mtu) ? max_mtu : dev->mtu; 2457 2458 /* adjust RX buffer size to new max MTU: */ 2459 card->qdio.in_buf_size = max_mtu + 2 * PAGE_SIZE; 2460 if (dev->max_mtu && dev->max_mtu != max_mtu) 2461 qeth_free_qdio_queues(card); 2462 } else { 2463 if (dev->mtu) 2464 new_mtu = dev->mtu; 2465 /* default MTUs for first setup: */ 2466 else if (IS_LAYER2(card)) 2467 new_mtu = ETH_DATA_LEN; 2468 else 2469 new_mtu = ETH_DATA_LEN - 8; /* allow for LLC + SNAP */ 2470 } 2471 2472 dev->max_mtu = max_mtu; 2473 dev->mtu = min(new_mtu, max_mtu); 2474 rtnl_unlock(); 2475 return 0; 2476 } 2477 2478 static int qeth_get_mtu_outof_framesize(int framesize) 2479 { 2480 switch (framesize) { 2481 case 0x4000: 2482 return 8192; 2483 case 0x6000: 2484 return 16384; 2485 case 0xa000: 2486 return 32768; 2487 case 0xffff: 2488 return 57344; 2489 default: 2490 return 0; 2491 } 2492 } 2493 2494 static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply, 2495 unsigned long data) 2496 { 2497 __u16 mtu, framesize; 2498 __u16 len; 2499 struct qeth_cmd_buffer *iob; 2500 u8 link_type = 0; 2501 2502 QETH_CARD_TEXT(card, 2, "ulpenacb"); 2503 2504 iob = (struct qeth_cmd_buffer *) data; 2505 memcpy(&card->token.ulp_filter_r, 2506 QETH_ULP_ENABLE_RESP_FILTER_TOKEN(iob->data), 2507 QETH_MPC_TOKEN_LENGTH); 2508 if (IS_IQD(card)) { 2509 memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2); 2510 mtu = qeth_get_mtu_outof_framesize(framesize); 2511 } else { 2512 mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data); 2513 } 2514 *(u16 *)reply->param = mtu; 2515 2516 memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2); 2517 if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) { 2518 memcpy(&link_type, 2519 QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1); 2520 if (!qeth_is_supported_link_type(card, link_type)) 2521 return -EPROTONOSUPPORT; 2522 } 2523 2524 card->info.link_type = link_type; 2525 QETH_CARD_TEXT_(card, 2, "link%d", card->info.link_type); 2526 return 0; 2527 } 2528 2529 static u8 qeth_mpc_select_prot_type(struct qeth_card *card) 2530 { 2531 if (IS_OSN(card)) 2532 return QETH_PROT_OSN2; 2533 return IS_LAYER2(card) ? QETH_PROT_LAYER2 : QETH_PROT_TCPIP; 2534 } 2535 2536 static int qeth_ulp_enable(struct qeth_card *card) 2537 { 2538 u8 prot_type = qeth_mpc_select_prot_type(card); 2539 struct qeth_cmd_buffer *iob; 2540 u16 max_mtu; 2541 int rc; 2542 2543 QETH_CARD_TEXT(card, 2, "ulpenabl"); 2544 2545 iob = qeth_mpc_alloc_cmd(card, ULP_ENABLE, ULP_ENABLE_SIZE); 2546 if (!iob) 2547 return -ENOMEM; 2548 2549 *(QETH_ULP_ENABLE_LINKNUM(iob->data)) = (u8) card->dev->dev_port; 2550 memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1); 2551 memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data), 2552 &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH); 2553 memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data), 2554 &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH); 2555 rc = qeth_send_control_data(card, iob, qeth_ulp_enable_cb, &max_mtu); 2556 if (rc) 2557 return rc; 2558 return qeth_update_max_mtu(card, max_mtu); 2559 } 2560 2561 static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply, 2562 unsigned long data) 2563 { 2564 struct qeth_cmd_buffer *iob; 2565 2566 QETH_CARD_TEXT(card, 2, "ulpstpcb"); 2567 2568 iob = (struct qeth_cmd_buffer *) data; 2569 memcpy(&card->token.ulp_connection_r, 2570 QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data), 2571 QETH_MPC_TOKEN_LENGTH); 2572 if (!strncmp("00S", QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data), 2573 3)) { 2574 QETH_CARD_TEXT(card, 2, "olmlimit"); 2575 dev_err(&card->gdev->dev, "A connection could not be " 2576 "established because of an OLM limit\n"); 2577 return -EMLINK; 2578 } 2579 return 0; 2580 } 2581 2582 static int qeth_ulp_setup(struct qeth_card *card) 2583 { 2584 __u16 temp; 2585 struct qeth_cmd_buffer *iob; 2586 2587 QETH_CARD_TEXT(card, 2, "ulpsetup"); 2588 2589 iob = qeth_mpc_alloc_cmd(card, ULP_SETUP, ULP_SETUP_SIZE); 2590 if (!iob) 2591 return -ENOMEM; 2592 2593 memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data), 2594 &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH); 2595 memcpy(QETH_ULP_SETUP_CONNECTION_TOKEN(iob->data), 2596 &card->token.ulp_connection_w, QETH_MPC_TOKEN_LENGTH); 2597 memcpy(QETH_ULP_SETUP_FILTER_TOKEN(iob->data), 2598 &card->token.ulp_filter_r, QETH_MPC_TOKEN_LENGTH); 2599 2600 memcpy(QETH_ULP_SETUP_CUA(iob->data), &card->info.ddev_devno, 2); 2601 temp = (card->info.cula << 8) + card->info.unit_addr2; 2602 memcpy(QETH_ULP_SETUP_REAL_DEVADDR(iob->data), &temp, 2); 2603 return qeth_send_control_data(card, iob, qeth_ulp_setup_cb, NULL); 2604 } 2605 2606 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *q, int bidx) 2607 { 2608 struct qeth_qdio_out_buffer *newbuf; 2609 2610 newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, GFP_ATOMIC); 2611 if (!newbuf) 2612 return -ENOMEM; 2613 2614 newbuf->buffer = q->qdio_bufs[bidx]; 2615 skb_queue_head_init(&newbuf->skb_list); 2616 lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key); 2617 newbuf->q = q; 2618 newbuf->next_pending = q->bufs[bidx]; 2619 atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY); 2620 q->bufs[bidx] = newbuf; 2621 return 0; 2622 } 2623 2624 static void qeth_free_output_queue(struct qeth_qdio_out_q *q) 2625 { 2626 if (!q) 2627 return; 2628 2629 qeth_drain_output_queue(q, true); 2630 qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q); 2631 kfree(q); 2632 } 2633 2634 static struct qeth_qdio_out_q *qeth_alloc_output_queue(void) 2635 { 2636 struct qeth_qdio_out_q *q = kzalloc(sizeof(*q), GFP_KERNEL); 2637 2638 if (!q) 2639 return NULL; 2640 2641 if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) { 2642 kfree(q); 2643 return NULL; 2644 } 2645 return q; 2646 } 2647 2648 static void qeth_tx_completion_timer(struct timer_list *timer) 2649 { 2650 struct qeth_qdio_out_q *queue = from_timer(queue, timer, timer); 2651 2652 napi_schedule(&queue->napi); 2653 QETH_TXQ_STAT_INC(queue, completion_timer); 2654 } 2655 2656 static int qeth_alloc_qdio_queues(struct qeth_card *card) 2657 { 2658 int i, j; 2659 2660 QETH_CARD_TEXT(card, 2, "allcqdbf"); 2661 2662 if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED, 2663 QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED) 2664 return 0; 2665 2666 QETH_CARD_TEXT(card, 2, "inq"); 2667 card->qdio.in_q = qeth_alloc_qdio_queue(); 2668 if (!card->qdio.in_q) 2669 goto out_nomem; 2670 2671 /* inbound buffer pool */ 2672 if (qeth_alloc_buffer_pool(card)) 2673 goto out_freeinq; 2674 2675 /* outbound */ 2676 for (i = 0; i < card->qdio.no_out_queues; ++i) { 2677 struct qeth_qdio_out_q *queue; 2678 2679 queue = qeth_alloc_output_queue(); 2680 if (!queue) 2681 goto out_freeoutq; 2682 QETH_CARD_TEXT_(card, 2, "outq %i", i); 2683 QETH_CARD_HEX(card, 2, &queue, sizeof(void *)); 2684 card->qdio.out_qs[i] = queue; 2685 queue->card = card; 2686 queue->queue_no = i; 2687 spin_lock_init(&queue->lock); 2688 timer_setup(&queue->timer, qeth_tx_completion_timer, 0); 2689 queue->coalesce_usecs = QETH_TX_COALESCE_USECS; 2690 queue->max_coalesced_frames = QETH_TX_MAX_COALESCED_FRAMES; 2691 queue->priority = QETH_QIB_PQUE_PRIO_DEFAULT; 2692 2693 /* give outbound qeth_qdio_buffers their qdio_buffers */ 2694 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) { 2695 WARN_ON(queue->bufs[j]); 2696 if (qeth_init_qdio_out_buf(queue, j)) 2697 goto out_freeoutqbufs; 2698 } 2699 } 2700 2701 /* completion */ 2702 if (qeth_alloc_cq(card)) 2703 goto out_freeoutq; 2704 2705 return 0; 2706 2707 out_freeoutqbufs: 2708 while (j > 0) { 2709 --j; 2710 kmem_cache_free(qeth_qdio_outbuf_cache, 2711 card->qdio.out_qs[i]->bufs[j]); 2712 card->qdio.out_qs[i]->bufs[j] = NULL; 2713 } 2714 out_freeoutq: 2715 while (i > 0) { 2716 qeth_free_output_queue(card->qdio.out_qs[--i]); 2717 card->qdio.out_qs[i] = NULL; 2718 } 2719 qeth_free_buffer_pool(card); 2720 out_freeinq: 2721 qeth_free_qdio_queue(card->qdio.in_q); 2722 card->qdio.in_q = NULL; 2723 out_nomem: 2724 atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED); 2725 return -ENOMEM; 2726 } 2727 2728 static void qeth_free_qdio_queues(struct qeth_card *card) 2729 { 2730 int i, j; 2731 2732 if (atomic_xchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED) == 2733 QETH_QDIO_UNINITIALIZED) 2734 return; 2735 2736 qeth_free_cq(card); 2737 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) { 2738 if (card->qdio.in_q->bufs[j].rx_skb) 2739 dev_kfree_skb_any(card->qdio.in_q->bufs[j].rx_skb); 2740 } 2741 qeth_free_qdio_queue(card->qdio.in_q); 2742 card->qdio.in_q = NULL; 2743 /* inbound buffer pool */ 2744 qeth_free_buffer_pool(card); 2745 /* free outbound qdio_qs */ 2746 for (i = 0; i < card->qdio.no_out_queues; i++) { 2747 qeth_free_output_queue(card->qdio.out_qs[i]); 2748 card->qdio.out_qs[i] = NULL; 2749 } 2750 } 2751 2752 static void qeth_fill_qib_parms(struct qeth_card *card, 2753 struct qeth_qib_parms *parms) 2754 { 2755 struct qeth_qdio_out_q *queue; 2756 unsigned int i; 2757 2758 parms->pcit_magic[0] = 'P'; 2759 parms->pcit_magic[1] = 'C'; 2760 parms->pcit_magic[2] = 'I'; 2761 parms->pcit_magic[3] = 'T'; 2762 ASCEBC(parms->pcit_magic, sizeof(parms->pcit_magic)); 2763 parms->pcit_a = QETH_PCI_THRESHOLD_A(card); 2764 parms->pcit_b = QETH_PCI_THRESHOLD_B(card); 2765 parms->pcit_c = QETH_PCI_TIMER_VALUE(card); 2766 2767 parms->blkt_magic[0] = 'B'; 2768 parms->blkt_magic[1] = 'L'; 2769 parms->blkt_magic[2] = 'K'; 2770 parms->blkt_magic[3] = 'T'; 2771 ASCEBC(parms->blkt_magic, sizeof(parms->blkt_magic)); 2772 parms->blkt_total = card->info.blkt.time_total; 2773 parms->blkt_inter_packet = card->info.blkt.inter_packet; 2774 parms->blkt_inter_packet_jumbo = card->info.blkt.inter_packet_jumbo; 2775 2776 /* Prio-queueing implicitly uses the default priorities: */ 2777 if (qeth_uses_tx_prio_queueing(card) || card->qdio.no_out_queues == 1) 2778 return; 2779 2780 parms->pque_magic[0] = 'P'; 2781 parms->pque_magic[1] = 'Q'; 2782 parms->pque_magic[2] = 'U'; 2783 parms->pque_magic[3] = 'E'; 2784 ASCEBC(parms->pque_magic, sizeof(parms->pque_magic)); 2785 parms->pque_order = QETH_QIB_PQUE_ORDER_RR; 2786 parms->pque_units = QETH_QIB_PQUE_UNITS_SBAL; 2787 2788 qeth_for_each_output_queue(card, queue, i) 2789 parms->pque_priority[i] = queue->priority; 2790 } 2791 2792 static int qeth_qdio_activate(struct qeth_card *card) 2793 { 2794 QETH_CARD_TEXT(card, 3, "qdioact"); 2795 return qdio_activate(CARD_DDEV(card)); 2796 } 2797 2798 static int qeth_dm_act(struct qeth_card *card) 2799 { 2800 struct qeth_cmd_buffer *iob; 2801 2802 QETH_CARD_TEXT(card, 2, "dmact"); 2803 2804 iob = qeth_mpc_alloc_cmd(card, DM_ACT, DM_ACT_SIZE); 2805 if (!iob) 2806 return -ENOMEM; 2807 2808 memcpy(QETH_DM_ACT_DEST_ADDR(iob->data), 2809 &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH); 2810 memcpy(QETH_DM_ACT_CONNECTION_TOKEN(iob->data), 2811 &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH); 2812 return qeth_send_control_data(card, iob, NULL, NULL); 2813 } 2814 2815 static int qeth_mpc_initialize(struct qeth_card *card) 2816 { 2817 int rc; 2818 2819 QETH_CARD_TEXT(card, 2, "mpcinit"); 2820 2821 rc = qeth_issue_next_read(card); 2822 if (rc) { 2823 QETH_CARD_TEXT_(card, 2, "1err%d", rc); 2824 return rc; 2825 } 2826 rc = qeth_cm_enable(card); 2827 if (rc) { 2828 QETH_CARD_TEXT_(card, 2, "2err%d", rc); 2829 return rc; 2830 } 2831 rc = qeth_cm_setup(card); 2832 if (rc) { 2833 QETH_CARD_TEXT_(card, 2, "3err%d", rc); 2834 return rc; 2835 } 2836 rc = qeth_ulp_enable(card); 2837 if (rc) { 2838 QETH_CARD_TEXT_(card, 2, "4err%d", rc); 2839 return rc; 2840 } 2841 rc = qeth_ulp_setup(card); 2842 if (rc) { 2843 QETH_CARD_TEXT_(card, 2, "5err%d", rc); 2844 return rc; 2845 } 2846 rc = qeth_alloc_qdio_queues(card); 2847 if (rc) { 2848 QETH_CARD_TEXT_(card, 2, "5err%d", rc); 2849 return rc; 2850 } 2851 rc = qeth_qdio_establish(card); 2852 if (rc) { 2853 QETH_CARD_TEXT_(card, 2, "6err%d", rc); 2854 qeth_free_qdio_queues(card); 2855 return rc; 2856 } 2857 rc = qeth_qdio_activate(card); 2858 if (rc) { 2859 QETH_CARD_TEXT_(card, 2, "7err%d", rc); 2860 return rc; 2861 } 2862 rc = qeth_dm_act(card); 2863 if (rc) { 2864 QETH_CARD_TEXT_(card, 2, "8err%d", rc); 2865 return rc; 2866 } 2867 2868 return 0; 2869 } 2870 2871 static void qeth_print_status_message(struct qeth_card *card) 2872 { 2873 switch (card->info.type) { 2874 case QETH_CARD_TYPE_OSD: 2875 case QETH_CARD_TYPE_OSM: 2876 case QETH_CARD_TYPE_OSX: 2877 /* VM will use a non-zero first character 2878 * to indicate a HiperSockets like reporting 2879 * of the level OSA sets the first character to zero 2880 * */ 2881 if (!card->info.mcl_level[0]) { 2882 sprintf(card->info.mcl_level, "%02x%02x", 2883 card->info.mcl_level[2], 2884 card->info.mcl_level[3]); 2885 break; 2886 } 2887 fallthrough; 2888 case QETH_CARD_TYPE_IQD: 2889 if (IS_VM_NIC(card) || (card->info.mcl_level[0] & 0x80)) { 2890 card->info.mcl_level[0] = (char) _ebcasc[(__u8) 2891 card->info.mcl_level[0]]; 2892 card->info.mcl_level[1] = (char) _ebcasc[(__u8) 2893 card->info.mcl_level[1]]; 2894 card->info.mcl_level[2] = (char) _ebcasc[(__u8) 2895 card->info.mcl_level[2]]; 2896 card->info.mcl_level[3] = (char) _ebcasc[(__u8) 2897 card->info.mcl_level[3]]; 2898 card->info.mcl_level[QETH_MCL_LENGTH] = 0; 2899 } 2900 break; 2901 default: 2902 memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1); 2903 } 2904 dev_info(&card->gdev->dev, 2905 "Device is a%s card%s%s%s\nwith link type %s.\n", 2906 qeth_get_cardname(card), 2907 (card->info.mcl_level[0]) ? " (level: " : "", 2908 (card->info.mcl_level[0]) ? card->info.mcl_level : "", 2909 (card->info.mcl_level[0]) ? ")" : "", 2910 qeth_get_cardname_short(card)); 2911 } 2912 2913 static void qeth_initialize_working_pool_list(struct qeth_card *card) 2914 { 2915 struct qeth_buffer_pool_entry *entry; 2916 2917 QETH_CARD_TEXT(card, 5, "inwrklst"); 2918 2919 list_for_each_entry(entry, 2920 &card->qdio.init_pool.entry_list, init_list) { 2921 qeth_put_buffer_pool_entry(card, entry); 2922 } 2923 } 2924 2925 static struct qeth_buffer_pool_entry *qeth_find_free_buffer_pool_entry( 2926 struct qeth_card *card) 2927 { 2928 struct qeth_buffer_pool_entry *entry; 2929 int i, free; 2930 2931 if (list_empty(&card->qdio.in_buf_pool.entry_list)) 2932 return NULL; 2933 2934 list_for_each_entry(entry, &card->qdio.in_buf_pool.entry_list, list) { 2935 free = 1; 2936 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) { 2937 if (page_count(entry->elements[i]) > 1) { 2938 free = 0; 2939 break; 2940 } 2941 } 2942 if (free) { 2943 list_del_init(&entry->list); 2944 return entry; 2945 } 2946 } 2947 2948 /* no free buffer in pool so take first one and swap pages */ 2949 entry = list_first_entry(&card->qdio.in_buf_pool.entry_list, 2950 struct qeth_buffer_pool_entry, list); 2951 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) { 2952 if (page_count(entry->elements[i]) > 1) { 2953 struct page *page = dev_alloc_page(); 2954 2955 if (!page) 2956 return NULL; 2957 2958 __free_page(entry->elements[i]); 2959 entry->elements[i] = page; 2960 QETH_CARD_STAT_INC(card, rx_sg_alloc_page); 2961 } 2962 } 2963 list_del_init(&entry->list); 2964 return entry; 2965 } 2966 2967 static int qeth_init_input_buffer(struct qeth_card *card, 2968 struct qeth_qdio_buffer *buf) 2969 { 2970 struct qeth_buffer_pool_entry *pool_entry = buf->pool_entry; 2971 int i; 2972 2973 if ((card->options.cq == QETH_CQ_ENABLED) && (!buf->rx_skb)) { 2974 buf->rx_skb = netdev_alloc_skb(card->dev, 2975 ETH_HLEN + 2976 sizeof(struct ipv6hdr)); 2977 if (!buf->rx_skb) 2978 return -ENOMEM; 2979 } 2980 2981 if (!pool_entry) { 2982 pool_entry = qeth_find_free_buffer_pool_entry(card); 2983 if (!pool_entry) 2984 return -ENOBUFS; 2985 2986 buf->pool_entry = pool_entry; 2987 } 2988 2989 /* 2990 * since the buffer is accessed only from the input_tasklet 2991 * there shouldn't be a need to synchronize; also, since we use 2992 * the QETH_IN_BUF_REQUEUE_THRESHOLD we should never run out off 2993 * buffers 2994 */ 2995 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) { 2996 buf->buffer->element[i].length = PAGE_SIZE; 2997 buf->buffer->element[i].addr = 2998 page_to_phys(pool_entry->elements[i]); 2999 if (i == QETH_MAX_BUFFER_ELEMENTS(card) - 1) 3000 buf->buffer->element[i].eflags = SBAL_EFLAGS_LAST_ENTRY; 3001 else 3002 buf->buffer->element[i].eflags = 0; 3003 buf->buffer->element[i].sflags = 0; 3004 } 3005 return 0; 3006 } 3007 3008 static unsigned int qeth_tx_select_bulk_max(struct qeth_card *card, 3009 struct qeth_qdio_out_q *queue) 3010 { 3011 if (!IS_IQD(card) || 3012 qeth_iqd_is_mcast_queue(card, queue) || 3013 card->options.cq == QETH_CQ_ENABLED || 3014 qdio_get_ssqd_desc(CARD_DDEV(card), &card->ssqd)) 3015 return 1; 3016 3017 return card->ssqd.mmwc ? card->ssqd.mmwc : 1; 3018 } 3019 3020 static int qeth_init_qdio_queues(struct qeth_card *card) 3021 { 3022 unsigned int rx_bufs = card->qdio.in_buf_pool.buf_count; 3023 unsigned int i; 3024 int rc; 3025 3026 QETH_CARD_TEXT(card, 2, "initqdqs"); 3027 3028 /* inbound queue */ 3029 qdio_reset_buffers(card->qdio.in_q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q); 3030 memset(&card->rx, 0, sizeof(struct qeth_rx)); 3031 3032 qeth_initialize_working_pool_list(card); 3033 /*give only as many buffers to hardware as we have buffer pool entries*/ 3034 for (i = 0; i < rx_bufs; i++) { 3035 rc = qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]); 3036 if (rc) 3037 return rc; 3038 } 3039 3040 card->qdio.in_q->next_buf_to_init = QDIO_BUFNR(rx_bufs); 3041 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0, 0, rx_bufs); 3042 if (rc) { 3043 QETH_CARD_TEXT_(card, 2, "1err%d", rc); 3044 return rc; 3045 } 3046 3047 /* completion */ 3048 rc = qeth_cq_init(card); 3049 if (rc) { 3050 return rc; 3051 } 3052 3053 /* outbound queue */ 3054 for (i = 0; i < card->qdio.no_out_queues; ++i) { 3055 struct qeth_qdio_out_q *queue = card->qdio.out_qs[i]; 3056 3057 qdio_reset_buffers(queue->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q); 3058 queue->max_elements = QETH_MAX_BUFFER_ELEMENTS(card); 3059 queue->next_buf_to_fill = 0; 3060 queue->do_pack = 0; 3061 queue->prev_hdr = NULL; 3062 queue->coalesced_frames = 0; 3063 queue->bulk_start = 0; 3064 queue->bulk_count = 0; 3065 queue->bulk_max = qeth_tx_select_bulk_max(card, queue); 3066 atomic_set(&queue->used_buffers, 0); 3067 atomic_set(&queue->set_pci_flags_count, 0); 3068 netdev_tx_reset_queue(netdev_get_tx_queue(card->dev, i)); 3069 } 3070 return 0; 3071 } 3072 3073 static void qeth_ipa_finalize_cmd(struct qeth_card *card, 3074 struct qeth_cmd_buffer *iob) 3075 { 3076 qeth_mpc_finalize_cmd(card, iob); 3077 3078 /* override with IPA-specific values: */ 3079 __ipa_cmd(iob)->hdr.seqno = card->seqno.ipa++; 3080 } 3081 3082 void qeth_prepare_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob, 3083 u16 cmd_length, 3084 bool (*match)(struct qeth_cmd_buffer *iob, 3085 struct qeth_cmd_buffer *reply)) 3086 { 3087 u8 prot_type = qeth_mpc_select_prot_type(card); 3088 u16 total_length = iob->length; 3089 3090 qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, total_length, 3091 iob->data); 3092 iob->finalize = qeth_ipa_finalize_cmd; 3093 iob->match = match; 3094 3095 memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE); 3096 memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &total_length, 2); 3097 memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1); 3098 memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &cmd_length, 2); 3099 memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &cmd_length, 2); 3100 memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data), 3101 &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH); 3102 memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &cmd_length, 2); 3103 } 3104 EXPORT_SYMBOL_GPL(qeth_prepare_ipa_cmd); 3105 3106 static bool qeth_ipa_match_reply(struct qeth_cmd_buffer *iob, 3107 struct qeth_cmd_buffer *reply) 3108 { 3109 struct qeth_ipa_cmd *ipa_reply = __ipa_reply(reply); 3110 3111 return ipa_reply && (__ipa_cmd(iob)->hdr.seqno == ipa_reply->hdr.seqno); 3112 } 3113 3114 struct qeth_cmd_buffer *qeth_ipa_alloc_cmd(struct qeth_card *card, 3115 enum qeth_ipa_cmds cmd_code, 3116 enum qeth_prot_versions prot, 3117 unsigned int data_length) 3118 { 3119 struct qeth_cmd_buffer *iob; 3120 struct qeth_ipacmd_hdr *hdr; 3121 3122 data_length += offsetof(struct qeth_ipa_cmd, data); 3123 iob = qeth_alloc_cmd(&card->write, IPA_PDU_HEADER_SIZE + data_length, 1, 3124 QETH_IPA_TIMEOUT); 3125 if (!iob) 3126 return NULL; 3127 3128 qeth_prepare_ipa_cmd(card, iob, data_length, qeth_ipa_match_reply); 3129 3130 hdr = &__ipa_cmd(iob)->hdr; 3131 hdr->command = cmd_code; 3132 hdr->initiator = IPA_CMD_INITIATOR_HOST; 3133 /* hdr->seqno is set by qeth_send_control_data() */ 3134 hdr->adapter_type = QETH_LINK_TYPE_FAST_ETH; 3135 hdr->rel_adapter_no = (u8) card->dev->dev_port; 3136 hdr->prim_version_no = IS_LAYER2(card) ? 2 : 1; 3137 hdr->param_count = 1; 3138 hdr->prot_version = prot; 3139 return iob; 3140 } 3141 EXPORT_SYMBOL_GPL(qeth_ipa_alloc_cmd); 3142 3143 static int qeth_send_ipa_cmd_cb(struct qeth_card *card, 3144 struct qeth_reply *reply, unsigned long data) 3145 { 3146 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; 3147 3148 return (cmd->hdr.return_code) ? -EIO : 0; 3149 } 3150 3151 /** 3152 * qeth_send_ipa_cmd() - send an IPA command 3153 * 3154 * See qeth_send_control_data() for explanation of the arguments. 3155 */ 3156 3157 int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob, 3158 int (*reply_cb)(struct qeth_card *, struct qeth_reply*, 3159 unsigned long), 3160 void *reply_param) 3161 { 3162 int rc; 3163 3164 QETH_CARD_TEXT(card, 4, "sendipa"); 3165 3166 if (card->read_or_write_problem) { 3167 qeth_put_cmd(iob); 3168 return -EIO; 3169 } 3170 3171 if (reply_cb == NULL) 3172 reply_cb = qeth_send_ipa_cmd_cb; 3173 rc = qeth_send_control_data(card, iob, reply_cb, reply_param); 3174 if (rc == -ETIME) { 3175 qeth_clear_ipacmd_list(card); 3176 qeth_schedule_recovery(card); 3177 } 3178 return rc; 3179 } 3180 EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd); 3181 3182 static int qeth_send_startlan_cb(struct qeth_card *card, 3183 struct qeth_reply *reply, unsigned long data) 3184 { 3185 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; 3186 3187 if (cmd->hdr.return_code == IPA_RC_LAN_OFFLINE) 3188 return -ENETDOWN; 3189 3190 return (cmd->hdr.return_code) ? -EIO : 0; 3191 } 3192 3193 static int qeth_send_startlan(struct qeth_card *card) 3194 { 3195 struct qeth_cmd_buffer *iob; 3196 3197 QETH_CARD_TEXT(card, 2, "strtlan"); 3198 3199 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_STARTLAN, QETH_PROT_NONE, 0); 3200 if (!iob) 3201 return -ENOMEM; 3202 return qeth_send_ipa_cmd(card, iob, qeth_send_startlan_cb, NULL); 3203 } 3204 3205 static int qeth_setadpparms_inspect_rc(struct qeth_ipa_cmd *cmd) 3206 { 3207 if (!cmd->hdr.return_code) 3208 cmd->hdr.return_code = 3209 cmd->data.setadapterparms.hdr.return_code; 3210 return cmd->hdr.return_code; 3211 } 3212 3213 static int qeth_query_setadapterparms_cb(struct qeth_card *card, 3214 struct qeth_reply *reply, unsigned long data) 3215 { 3216 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; 3217 struct qeth_query_cmds_supp *query_cmd; 3218 3219 QETH_CARD_TEXT(card, 3, "quyadpcb"); 3220 if (qeth_setadpparms_inspect_rc(cmd)) 3221 return -EIO; 3222 3223 query_cmd = &cmd->data.setadapterparms.data.query_cmds_supp; 3224 if (query_cmd->lan_type & 0x7f) { 3225 if (!qeth_is_supported_link_type(card, query_cmd->lan_type)) 3226 return -EPROTONOSUPPORT; 3227 3228 card->info.link_type = query_cmd->lan_type; 3229 QETH_CARD_TEXT_(card, 2, "lnk %d", card->info.link_type); 3230 } 3231 3232 card->options.adp.supported = query_cmd->supported_cmds; 3233 return 0; 3234 } 3235 3236 static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card, 3237 enum qeth_ipa_setadp_cmd adp_cmd, 3238 unsigned int data_length) 3239 { 3240 struct qeth_ipacmd_setadpparms_hdr *hdr; 3241 struct qeth_cmd_buffer *iob; 3242 3243 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETADAPTERPARMS, QETH_PROT_IPV4, 3244 data_length + 3245 offsetof(struct qeth_ipacmd_setadpparms, 3246 data)); 3247 if (!iob) 3248 return NULL; 3249 3250 hdr = &__ipa_cmd(iob)->data.setadapterparms.hdr; 3251 hdr->cmdlength = sizeof(*hdr) + data_length; 3252 hdr->command_code = adp_cmd; 3253 hdr->used_total = 1; 3254 hdr->seq_no = 1; 3255 return iob; 3256 } 3257 3258 static int qeth_query_setadapterparms(struct qeth_card *card) 3259 { 3260 int rc; 3261 struct qeth_cmd_buffer *iob; 3262 3263 QETH_CARD_TEXT(card, 3, "queryadp"); 3264 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_COMMANDS_SUPPORTED, 3265 SETADP_DATA_SIZEOF(query_cmds_supp)); 3266 if (!iob) 3267 return -ENOMEM; 3268 rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL); 3269 return rc; 3270 } 3271 3272 static int qeth_query_ipassists_cb(struct qeth_card *card, 3273 struct qeth_reply *reply, unsigned long data) 3274 { 3275 struct qeth_ipa_cmd *cmd; 3276 3277 QETH_CARD_TEXT(card, 2, "qipasscb"); 3278 3279 cmd = (struct qeth_ipa_cmd *) data; 3280 3281 switch (cmd->hdr.return_code) { 3282 case IPA_RC_SUCCESS: 3283 break; 3284 case IPA_RC_NOTSUPP: 3285 case IPA_RC_L2_UNSUPPORTED_CMD: 3286 QETH_CARD_TEXT(card, 2, "ipaunsup"); 3287 card->options.ipa4.supported |= IPA_SETADAPTERPARMS; 3288 card->options.ipa6.supported |= IPA_SETADAPTERPARMS; 3289 return -EOPNOTSUPP; 3290 default: 3291 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Unhandled rc=%#x\n", 3292 CARD_DEVID(card), cmd->hdr.return_code); 3293 return -EIO; 3294 } 3295 3296 if (cmd->hdr.prot_version == QETH_PROT_IPV4) 3297 card->options.ipa4 = cmd->hdr.assists; 3298 else if (cmd->hdr.prot_version == QETH_PROT_IPV6) 3299 card->options.ipa6 = cmd->hdr.assists; 3300 else 3301 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Flawed LIC detected\n", 3302 CARD_DEVID(card)); 3303 return 0; 3304 } 3305 3306 static int qeth_query_ipassists(struct qeth_card *card, 3307 enum qeth_prot_versions prot) 3308 { 3309 int rc; 3310 struct qeth_cmd_buffer *iob; 3311 3312 QETH_CARD_TEXT_(card, 2, "qipassi%i", prot); 3313 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_QIPASSIST, prot, 0); 3314 if (!iob) 3315 return -ENOMEM; 3316 rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL); 3317 return rc; 3318 } 3319 3320 static int qeth_query_switch_attributes_cb(struct qeth_card *card, 3321 struct qeth_reply *reply, unsigned long data) 3322 { 3323 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; 3324 struct qeth_query_switch_attributes *attrs; 3325 struct qeth_switch_info *sw_info; 3326 3327 QETH_CARD_TEXT(card, 2, "qswiatcb"); 3328 if (qeth_setadpparms_inspect_rc(cmd)) 3329 return -EIO; 3330 3331 sw_info = (struct qeth_switch_info *)reply->param; 3332 attrs = &cmd->data.setadapterparms.data.query_switch_attributes; 3333 sw_info->capabilities = attrs->capabilities; 3334 sw_info->settings = attrs->settings; 3335 QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities, 3336 sw_info->settings); 3337 return 0; 3338 } 3339 3340 int qeth_query_switch_attributes(struct qeth_card *card, 3341 struct qeth_switch_info *sw_info) 3342 { 3343 struct qeth_cmd_buffer *iob; 3344 3345 QETH_CARD_TEXT(card, 2, "qswiattr"); 3346 if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES)) 3347 return -EOPNOTSUPP; 3348 if (!netif_carrier_ok(card->dev)) 3349 return -ENOMEDIUM; 3350 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES, 0); 3351 if (!iob) 3352 return -ENOMEM; 3353 return qeth_send_ipa_cmd(card, iob, 3354 qeth_query_switch_attributes_cb, sw_info); 3355 } 3356 3357 struct qeth_cmd_buffer *qeth_get_diag_cmd(struct qeth_card *card, 3358 enum qeth_diags_cmds sub_cmd, 3359 unsigned int data_length) 3360 { 3361 struct qeth_ipacmd_diagass *cmd; 3362 struct qeth_cmd_buffer *iob; 3363 3364 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SET_DIAG_ASS, QETH_PROT_NONE, 3365 DIAG_HDR_LEN + data_length); 3366 if (!iob) 3367 return NULL; 3368 3369 cmd = &__ipa_cmd(iob)->data.diagass; 3370 cmd->subcmd_len = DIAG_SUB_HDR_LEN + data_length; 3371 cmd->subcmd = sub_cmd; 3372 return iob; 3373 } 3374 EXPORT_SYMBOL_GPL(qeth_get_diag_cmd); 3375 3376 static int qeth_query_setdiagass_cb(struct qeth_card *card, 3377 struct qeth_reply *reply, unsigned long data) 3378 { 3379 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; 3380 u16 rc = cmd->hdr.return_code; 3381 3382 if (rc) { 3383 QETH_CARD_TEXT_(card, 2, "diagq:%x", rc); 3384 return -EIO; 3385 } 3386 3387 card->info.diagass_support = cmd->data.diagass.ext; 3388 return 0; 3389 } 3390 3391 static int qeth_query_setdiagass(struct qeth_card *card) 3392 { 3393 struct qeth_cmd_buffer *iob; 3394 3395 QETH_CARD_TEXT(card, 2, "qdiagass"); 3396 iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_QUERY, 0); 3397 if (!iob) 3398 return -ENOMEM; 3399 return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL); 3400 } 3401 3402 static void qeth_get_trap_id(struct qeth_card *card, struct qeth_trap_id *tid) 3403 { 3404 unsigned long info = get_zeroed_page(GFP_KERNEL); 3405 struct sysinfo_2_2_2 *info222 = (struct sysinfo_2_2_2 *)info; 3406 struct sysinfo_3_2_2 *info322 = (struct sysinfo_3_2_2 *)info; 3407 struct ccw_dev_id ccwid; 3408 int level; 3409 3410 tid->chpid = card->info.chpid; 3411 ccw_device_get_id(CARD_RDEV(card), &ccwid); 3412 tid->ssid = ccwid.ssid; 3413 tid->devno = ccwid.devno; 3414 if (!info) 3415 return; 3416 level = stsi(NULL, 0, 0, 0); 3417 if ((level >= 2) && (stsi(info222, 2, 2, 2) == 0)) 3418 tid->lparnr = info222->lpar_number; 3419 if ((level >= 3) && (stsi(info322, 3, 2, 2) == 0)) { 3420 EBCASC(info322->vm[0].name, sizeof(info322->vm[0].name)); 3421 memcpy(tid->vmname, info322->vm[0].name, sizeof(tid->vmname)); 3422 } 3423 free_page(info); 3424 } 3425 3426 static int qeth_hw_trap_cb(struct qeth_card *card, 3427 struct qeth_reply *reply, unsigned long data) 3428 { 3429 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; 3430 u16 rc = cmd->hdr.return_code; 3431 3432 if (rc) { 3433 QETH_CARD_TEXT_(card, 2, "trapc:%x", rc); 3434 return -EIO; 3435 } 3436 return 0; 3437 } 3438 3439 int qeth_hw_trap(struct qeth_card *card, enum qeth_diags_trap_action action) 3440 { 3441 struct qeth_cmd_buffer *iob; 3442 struct qeth_ipa_cmd *cmd; 3443 3444 QETH_CARD_TEXT(card, 2, "diagtrap"); 3445 iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_TRAP, 64); 3446 if (!iob) 3447 return -ENOMEM; 3448 cmd = __ipa_cmd(iob); 3449 cmd->data.diagass.type = 1; 3450 cmd->data.diagass.action = action; 3451 switch (action) { 3452 case QETH_DIAGS_TRAP_ARM: 3453 cmd->data.diagass.options = 0x0003; 3454 cmd->data.diagass.ext = 0x00010000 + 3455 sizeof(struct qeth_trap_id); 3456 qeth_get_trap_id(card, 3457 (struct qeth_trap_id *)cmd->data.diagass.cdata); 3458 break; 3459 case QETH_DIAGS_TRAP_DISARM: 3460 cmd->data.diagass.options = 0x0001; 3461 break; 3462 case QETH_DIAGS_TRAP_CAPTURE: 3463 break; 3464 } 3465 return qeth_send_ipa_cmd(card, iob, qeth_hw_trap_cb, NULL); 3466 } 3467 3468 static int qeth_check_qdio_errors(struct qeth_card *card, 3469 struct qdio_buffer *buf, 3470 unsigned int qdio_error, 3471 const char *dbftext) 3472 { 3473 if (qdio_error) { 3474 QETH_CARD_TEXT(card, 2, dbftext); 3475 QETH_CARD_TEXT_(card, 2, " F15=%02X", 3476 buf->element[15].sflags); 3477 QETH_CARD_TEXT_(card, 2, " F14=%02X", 3478 buf->element[14].sflags); 3479 QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error); 3480 if ((buf->element[15].sflags) == 0x12) { 3481 QETH_CARD_STAT_INC(card, rx_fifo_errors); 3482 return 0; 3483 } else 3484 return 1; 3485 } 3486 return 0; 3487 } 3488 3489 static unsigned int qeth_rx_refill_queue(struct qeth_card *card, 3490 unsigned int count) 3491 { 3492 struct qeth_qdio_q *queue = card->qdio.in_q; 3493 struct list_head *lh; 3494 int i; 3495 int rc; 3496 int newcount = 0; 3497 3498 /* only requeue at a certain threshold to avoid SIGAs */ 3499 if (count >= QETH_IN_BUF_REQUEUE_THRESHOLD(card)) { 3500 for (i = queue->next_buf_to_init; 3501 i < queue->next_buf_to_init + count; ++i) { 3502 if (qeth_init_input_buffer(card, 3503 &queue->bufs[QDIO_BUFNR(i)])) { 3504 break; 3505 } else { 3506 newcount++; 3507 } 3508 } 3509 3510 if (newcount < count) { 3511 /* we are in memory shortage so we switch back to 3512 traditional skb allocation and drop packages */ 3513 atomic_set(&card->force_alloc_skb, 3); 3514 count = newcount; 3515 } else { 3516 atomic_add_unless(&card->force_alloc_skb, -1, 0); 3517 } 3518 3519 if (!count) { 3520 i = 0; 3521 list_for_each(lh, &card->qdio.in_buf_pool.entry_list) 3522 i++; 3523 if (i == card->qdio.in_buf_pool.buf_count) { 3524 QETH_CARD_TEXT(card, 2, "qsarbw"); 3525 schedule_delayed_work( 3526 &card->buffer_reclaim_work, 3527 QETH_RECLAIM_WORK_TIME); 3528 } 3529 return 0; 3530 } 3531 3532 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0, 3533 queue->next_buf_to_init, count); 3534 if (rc) { 3535 QETH_CARD_TEXT(card, 2, "qinberr"); 3536 } 3537 queue->next_buf_to_init = QDIO_BUFNR(queue->next_buf_to_init + 3538 count); 3539 return count; 3540 } 3541 3542 return 0; 3543 } 3544 3545 static void qeth_buffer_reclaim_work(struct work_struct *work) 3546 { 3547 struct qeth_card *card = container_of(to_delayed_work(work), 3548 struct qeth_card, 3549 buffer_reclaim_work); 3550 3551 local_bh_disable(); 3552 napi_schedule(&card->napi); 3553 /* kick-start the NAPI softirq: */ 3554 local_bh_enable(); 3555 } 3556 3557 static void qeth_handle_send_error(struct qeth_card *card, 3558 struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err) 3559 { 3560 int sbalf15 = buffer->buffer->element[15].sflags; 3561 3562 QETH_CARD_TEXT(card, 6, "hdsnderr"); 3563 qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr"); 3564 3565 if (!qdio_err) 3566 return; 3567 3568 if ((sbalf15 >= 15) && (sbalf15 <= 31)) 3569 return; 3570 3571 QETH_CARD_TEXT(card, 1, "lnkfail"); 3572 QETH_CARD_TEXT_(card, 1, "%04x %02x", 3573 (u16)qdio_err, (u8)sbalf15); 3574 } 3575 3576 /** 3577 * qeth_prep_flush_pack_buffer - Prepares flushing of a packing buffer. 3578 * @queue: queue to check for packing buffer 3579 * 3580 * Returns number of buffers that were prepared for flush. 3581 */ 3582 static int qeth_prep_flush_pack_buffer(struct qeth_qdio_out_q *queue) 3583 { 3584 struct qeth_qdio_out_buffer *buffer; 3585 3586 buffer = queue->bufs[queue->next_buf_to_fill]; 3587 if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) && 3588 (buffer->next_element_to_fill > 0)) { 3589 /* it's a packing buffer */ 3590 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED); 3591 queue->next_buf_to_fill = 3592 QDIO_BUFNR(queue->next_buf_to_fill + 1); 3593 return 1; 3594 } 3595 return 0; 3596 } 3597 3598 /* 3599 * Switched to packing state if the number of used buffers on a queue 3600 * reaches a certain limit. 3601 */ 3602 static void qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q *queue) 3603 { 3604 if (!queue->do_pack) { 3605 if (atomic_read(&queue->used_buffers) 3606 >= QETH_HIGH_WATERMARK_PACK){ 3607 /* switch non-PACKING -> PACKING */ 3608 QETH_CARD_TEXT(queue->card, 6, "np->pack"); 3609 QETH_TXQ_STAT_INC(queue, packing_mode_switch); 3610 queue->do_pack = 1; 3611 } 3612 } 3613 } 3614 3615 /* 3616 * Switches from packing to non-packing mode. If there is a packing 3617 * buffer on the queue this buffer will be prepared to be flushed. 3618 * In that case 1 is returned to inform the caller. If no buffer 3619 * has to be flushed, zero is returned. 3620 */ 3621 static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue) 3622 { 3623 if (queue->do_pack) { 3624 if (atomic_read(&queue->used_buffers) 3625 <= QETH_LOW_WATERMARK_PACK) { 3626 /* switch PACKING -> non-PACKING */ 3627 QETH_CARD_TEXT(queue->card, 6, "pack->np"); 3628 QETH_TXQ_STAT_INC(queue, packing_mode_switch); 3629 queue->do_pack = 0; 3630 return qeth_prep_flush_pack_buffer(queue); 3631 } 3632 } 3633 return 0; 3634 } 3635 3636 static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index, 3637 int count) 3638 { 3639 struct qeth_qdio_out_buffer *buf = queue->bufs[index]; 3640 unsigned int qdio_flags = QDIO_FLAG_SYNC_OUTPUT; 3641 struct qeth_card *card = queue->card; 3642 int rc; 3643 int i; 3644 3645 for (i = index; i < index + count; ++i) { 3646 unsigned int bidx = QDIO_BUFNR(i); 3647 struct sk_buff *skb; 3648 3649 buf = queue->bufs[bidx]; 3650 buf->buffer->element[buf->next_element_to_fill - 1].eflags |= 3651 SBAL_EFLAGS_LAST_ENTRY; 3652 queue->coalesced_frames += buf->frames; 3653 3654 if (queue->bufstates) 3655 queue->bufstates[bidx].user = buf; 3656 3657 if (IS_IQD(card)) { 3658 skb_queue_walk(&buf->skb_list, skb) 3659 skb_tx_timestamp(skb); 3660 } 3661 } 3662 3663 if (!IS_IQD(card)) { 3664 if (!queue->do_pack) { 3665 if ((atomic_read(&queue->used_buffers) >= 3666 (QETH_HIGH_WATERMARK_PACK - 3667 QETH_WATERMARK_PACK_FUZZ)) && 3668 !atomic_read(&queue->set_pci_flags_count)) { 3669 /* it's likely that we'll go to packing 3670 * mode soon */ 3671 atomic_inc(&queue->set_pci_flags_count); 3672 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ; 3673 } 3674 } else { 3675 if (!atomic_read(&queue->set_pci_flags_count)) { 3676 /* 3677 * there's no outstanding PCI any more, so we 3678 * have to request a PCI to be sure the the PCI 3679 * will wake at some time in the future then we 3680 * can flush packed buffers that might still be 3681 * hanging around, which can happen if no 3682 * further send was requested by the stack 3683 */ 3684 atomic_inc(&queue->set_pci_flags_count); 3685 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ; 3686 } 3687 } 3688 3689 if (atomic_read(&queue->set_pci_flags_count)) 3690 qdio_flags |= QDIO_FLAG_PCI_OUT; 3691 } 3692 3693 QETH_TXQ_STAT_INC(queue, doorbell); 3694 rc = do_QDIO(CARD_DDEV(queue->card), qdio_flags, 3695 queue->queue_no, index, count); 3696 3697 switch (rc) { 3698 case 0: 3699 case -ENOBUFS: 3700 /* ignore temporary SIGA errors without busy condition */ 3701 3702 /* Fake the TX completion interrupt: */ 3703 if (IS_IQD(card)) { 3704 unsigned int frames = READ_ONCE(queue->max_coalesced_frames); 3705 unsigned int usecs = READ_ONCE(queue->coalesce_usecs); 3706 3707 if (frames && queue->coalesced_frames >= frames) { 3708 napi_schedule(&queue->napi); 3709 queue->coalesced_frames = 0; 3710 QETH_TXQ_STAT_INC(queue, coal_frames); 3711 } else if (usecs) { 3712 qeth_tx_arm_timer(queue, usecs); 3713 } 3714 } 3715 3716 break; 3717 default: 3718 QETH_CARD_TEXT(queue->card, 2, "flushbuf"); 3719 QETH_CARD_TEXT_(queue->card, 2, " q%d", queue->queue_no); 3720 QETH_CARD_TEXT_(queue->card, 2, " idx%d", index); 3721 QETH_CARD_TEXT_(queue->card, 2, " c%d", count); 3722 QETH_CARD_TEXT_(queue->card, 2, " err%d", rc); 3723 3724 /* this must not happen under normal circumstances. if it 3725 * happens something is really wrong -> recover */ 3726 qeth_schedule_recovery(queue->card); 3727 } 3728 } 3729 3730 static void qeth_flush_queue(struct qeth_qdio_out_q *queue) 3731 { 3732 qeth_flush_buffers(queue, queue->bulk_start, queue->bulk_count); 3733 3734 queue->bulk_start = QDIO_BUFNR(queue->bulk_start + queue->bulk_count); 3735 queue->prev_hdr = NULL; 3736 queue->bulk_count = 0; 3737 } 3738 3739 static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue) 3740 { 3741 /* 3742 * check if weed have to switch to non-packing mode or if 3743 * we have to get a pci flag out on the queue 3744 */ 3745 if ((atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) || 3746 !atomic_read(&queue->set_pci_flags_count)) { 3747 unsigned int index, flush_cnt; 3748 bool q_was_packing; 3749 3750 spin_lock(&queue->lock); 3751 3752 index = queue->next_buf_to_fill; 3753 q_was_packing = queue->do_pack; 3754 3755 flush_cnt = qeth_switch_to_nonpacking_if_needed(queue); 3756 if (!flush_cnt && !atomic_read(&queue->set_pci_flags_count)) 3757 flush_cnt = qeth_prep_flush_pack_buffer(queue); 3758 3759 if (flush_cnt) { 3760 qeth_flush_buffers(queue, index, flush_cnt); 3761 if (q_was_packing) 3762 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_cnt); 3763 } 3764 3765 spin_unlock(&queue->lock); 3766 } 3767 } 3768 3769 static void qeth_qdio_poll(struct ccw_device *cdev, unsigned long card_ptr) 3770 { 3771 struct qeth_card *card = (struct qeth_card *)card_ptr; 3772 3773 napi_schedule_irqoff(&card->napi); 3774 } 3775 3776 int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq) 3777 { 3778 int rc; 3779 3780 if (card->options.cq == QETH_CQ_NOTAVAILABLE) { 3781 rc = -1; 3782 goto out; 3783 } else { 3784 if (card->options.cq == cq) { 3785 rc = 0; 3786 goto out; 3787 } 3788 3789 qeth_free_qdio_queues(card); 3790 card->options.cq = cq; 3791 rc = 0; 3792 } 3793 out: 3794 return rc; 3795 3796 } 3797 EXPORT_SYMBOL_GPL(qeth_configure_cq); 3798 3799 static void qeth_qdio_cq_handler(struct qeth_card *card, unsigned int qdio_err, 3800 unsigned int queue, int first_element, 3801 int count) 3802 { 3803 struct qeth_qdio_q *cq = card->qdio.c_q; 3804 int i; 3805 int rc; 3806 3807 QETH_CARD_TEXT_(card, 5, "qcqhe%d", first_element); 3808 QETH_CARD_TEXT_(card, 5, "qcqhc%d", count); 3809 QETH_CARD_TEXT_(card, 5, "qcqherr%d", qdio_err); 3810 3811 if (qdio_err) { 3812 netif_tx_stop_all_queues(card->dev); 3813 qeth_schedule_recovery(card); 3814 return; 3815 } 3816 3817 for (i = first_element; i < first_element + count; ++i) { 3818 struct qdio_buffer *buffer = cq->qdio_bufs[QDIO_BUFNR(i)]; 3819 int e = 0; 3820 3821 while ((e < QDIO_MAX_ELEMENTS_PER_BUFFER) && 3822 buffer->element[e].addr) { 3823 unsigned long phys_aob_addr = buffer->element[e].addr; 3824 3825 qeth_qdio_handle_aob(card, phys_aob_addr); 3826 ++e; 3827 } 3828 qeth_scrub_qdio_buffer(buffer, QDIO_MAX_ELEMENTS_PER_BUFFER); 3829 } 3830 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, queue, 3831 card->qdio.c_q->next_buf_to_init, 3832 count); 3833 if (rc) { 3834 dev_warn(&card->gdev->dev, 3835 "QDIO reported an error, rc=%i\n", rc); 3836 QETH_CARD_TEXT(card, 2, "qcqherr"); 3837 } 3838 3839 cq->next_buf_to_init = QDIO_BUFNR(cq->next_buf_to_init + count); 3840 } 3841 3842 static void qeth_qdio_input_handler(struct ccw_device *ccwdev, 3843 unsigned int qdio_err, int queue, 3844 int first_elem, int count, 3845 unsigned long card_ptr) 3846 { 3847 struct qeth_card *card = (struct qeth_card *)card_ptr; 3848 3849 QETH_CARD_TEXT_(card, 2, "qihq%d", queue); 3850 QETH_CARD_TEXT_(card, 2, "qiec%d", qdio_err); 3851 3852 if (qdio_err) 3853 qeth_schedule_recovery(card); 3854 } 3855 3856 static void qeth_qdio_output_handler(struct ccw_device *ccwdev, 3857 unsigned int qdio_error, int __queue, 3858 int first_element, int count, 3859 unsigned long card_ptr) 3860 { 3861 struct qeth_card *card = (struct qeth_card *) card_ptr; 3862 struct qeth_qdio_out_q *queue = card->qdio.out_qs[__queue]; 3863 struct net_device *dev = card->dev; 3864 struct netdev_queue *txq; 3865 int i; 3866 3867 QETH_CARD_TEXT(card, 6, "qdouhdl"); 3868 if (qdio_error & QDIO_ERROR_FATAL) { 3869 QETH_CARD_TEXT(card, 2, "achkcond"); 3870 netif_tx_stop_all_queues(dev); 3871 qeth_schedule_recovery(card); 3872 return; 3873 } 3874 3875 for (i = first_element; i < (first_element + count); ++i) { 3876 struct qeth_qdio_out_buffer *buf = queue->bufs[QDIO_BUFNR(i)]; 3877 3878 qeth_handle_send_error(card, buf, qdio_error); 3879 qeth_clear_output_buffer(queue, buf, qdio_error, 0); 3880 } 3881 3882 atomic_sub(count, &queue->used_buffers); 3883 qeth_check_outbound_queue(queue); 3884 3885 txq = netdev_get_tx_queue(dev, __queue); 3886 /* xmit may have observed the full-condition, but not yet stopped the 3887 * txq. In which case the code below won't trigger. So before returning, 3888 * xmit will re-check the txq's fill level and wake it up if needed. 3889 */ 3890 if (netif_tx_queue_stopped(txq) && !qeth_out_queue_is_full(queue)) 3891 netif_tx_wake_queue(txq); 3892 } 3893 3894 /** 3895 * Note: Function assumes that we have 4 outbound queues. 3896 */ 3897 int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb) 3898 { 3899 struct vlan_ethhdr *veth = vlan_eth_hdr(skb); 3900 u8 tos; 3901 3902 switch (card->qdio.do_prio_queueing) { 3903 case QETH_PRIO_Q_ING_TOS: 3904 case QETH_PRIO_Q_ING_PREC: 3905 switch (vlan_get_protocol(skb)) { 3906 case htons(ETH_P_IP): 3907 tos = ipv4_get_dsfield(ip_hdr(skb)); 3908 break; 3909 case htons(ETH_P_IPV6): 3910 tos = ipv6_get_dsfield(ipv6_hdr(skb)); 3911 break; 3912 default: 3913 return card->qdio.default_out_queue; 3914 } 3915 if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC) 3916 return ~tos >> 6 & 3; 3917 if (tos & IPTOS_MINCOST) 3918 return 3; 3919 if (tos & IPTOS_RELIABILITY) 3920 return 2; 3921 if (tos & IPTOS_THROUGHPUT) 3922 return 1; 3923 if (tos & IPTOS_LOWDELAY) 3924 return 0; 3925 break; 3926 case QETH_PRIO_Q_ING_SKB: 3927 if (skb->priority > 5) 3928 return 0; 3929 return ~skb->priority >> 1 & 3; 3930 case QETH_PRIO_Q_ING_VLAN: 3931 if (veth->h_vlan_proto == htons(ETH_P_8021Q)) 3932 return ~ntohs(veth->h_vlan_TCI) >> 3933 (VLAN_PRIO_SHIFT + 1) & 3; 3934 break; 3935 case QETH_PRIO_Q_ING_FIXED: 3936 return card->qdio.default_out_queue; 3937 default: 3938 break; 3939 } 3940 return card->qdio.default_out_queue; 3941 } 3942 EXPORT_SYMBOL_GPL(qeth_get_priority_queue); 3943 3944 /** 3945 * qeth_get_elements_for_frags() - find number of SBALEs for skb frags. 3946 * @skb: SKB address 3947 * 3948 * Returns the number of pages, and thus QDIO buffer elements, needed to cover 3949 * fragmented part of the SKB. Returns zero for linear SKB. 3950 */ 3951 static int qeth_get_elements_for_frags(struct sk_buff *skb) 3952 { 3953 int cnt, elements = 0; 3954 3955 for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) { 3956 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt]; 3957 3958 elements += qeth_get_elements_for_range( 3959 (addr_t)skb_frag_address(frag), 3960 (addr_t)skb_frag_address(frag) + skb_frag_size(frag)); 3961 } 3962 return elements; 3963 } 3964 3965 /** 3966 * qeth_count_elements() - Counts the number of QDIO buffer elements needed 3967 * to transmit an skb. 3968 * @skb: the skb to operate on. 3969 * @data_offset: skip this part of the skb's linear data 3970 * 3971 * Returns the number of pages, and thus QDIO buffer elements, needed to map the 3972 * skb's data (both its linear part and paged fragments). 3973 */ 3974 unsigned int qeth_count_elements(struct sk_buff *skb, unsigned int data_offset) 3975 { 3976 unsigned int elements = qeth_get_elements_for_frags(skb); 3977 addr_t end = (addr_t)skb->data + skb_headlen(skb); 3978 addr_t start = (addr_t)skb->data + data_offset; 3979 3980 if (start != end) 3981 elements += qeth_get_elements_for_range(start, end); 3982 return elements; 3983 } 3984 EXPORT_SYMBOL_GPL(qeth_count_elements); 3985 3986 #define QETH_HDR_CACHE_OBJ_SIZE (sizeof(struct qeth_hdr_tso) + \ 3987 MAX_TCP_HEADER) 3988 3989 /** 3990 * qeth_add_hw_header() - add a HW header to an skb. 3991 * @skb: skb that the HW header should be added to. 3992 * @hdr: double pointer to a qeth_hdr. When returning with >= 0, 3993 * it contains a valid pointer to a qeth_hdr. 3994 * @hdr_len: length of the HW header. 3995 * @proto_len: length of protocol headers that need to be in same page as the 3996 * HW header. 3997 * 3998 * Returns the pushed length. If the header can't be pushed on 3999 * (eg. because it would cross a page boundary), it is allocated from 4000 * the cache instead and 0 is returned. 4001 * The number of needed buffer elements is returned in @elements. 4002 * Error to create the hdr is indicated by returning with < 0. 4003 */ 4004 static int qeth_add_hw_header(struct qeth_qdio_out_q *queue, 4005 struct sk_buff *skb, struct qeth_hdr **hdr, 4006 unsigned int hdr_len, unsigned int proto_len, 4007 unsigned int *elements) 4008 { 4009 gfp_t gfp = GFP_ATOMIC | (skb_pfmemalloc(skb) ? __GFP_MEMALLOC : 0); 4010 const unsigned int contiguous = proto_len ? proto_len : 1; 4011 const unsigned int max_elements = queue->max_elements; 4012 unsigned int __elements; 4013 addr_t start, end; 4014 bool push_ok; 4015 int rc; 4016 4017 check_layout: 4018 start = (addr_t)skb->data - hdr_len; 4019 end = (addr_t)skb->data; 4020 4021 if (qeth_get_elements_for_range(start, end + contiguous) == 1) { 4022 /* Push HW header into same page as first protocol header. */ 4023 push_ok = true; 4024 /* ... but TSO always needs a separate element for headers: */ 4025 if (skb_is_gso(skb)) 4026 __elements = 1 + qeth_count_elements(skb, proto_len); 4027 else 4028 __elements = qeth_count_elements(skb, 0); 4029 } else if (!proto_len && PAGE_ALIGNED(skb->data)) { 4030 /* Push HW header into preceding page, flush with skb->data. */ 4031 push_ok = true; 4032 __elements = 1 + qeth_count_elements(skb, 0); 4033 } else { 4034 /* Use header cache, copy protocol headers up. */ 4035 push_ok = false; 4036 __elements = 1 + qeth_count_elements(skb, proto_len); 4037 } 4038 4039 /* Compress skb to fit into one IO buffer: */ 4040 if (__elements > max_elements) { 4041 if (!skb_is_nonlinear(skb)) { 4042 /* Drop it, no easy way of shrinking it further. */ 4043 QETH_DBF_MESSAGE(2, "Dropped an oversized skb (Max Elements=%u / Actual=%u / Length=%u).\n", 4044 max_elements, __elements, skb->len); 4045 return -E2BIG; 4046 } 4047 4048 rc = skb_linearize(skb); 4049 if (rc) { 4050 QETH_TXQ_STAT_INC(queue, skbs_linearized_fail); 4051 return rc; 4052 } 4053 4054 QETH_TXQ_STAT_INC(queue, skbs_linearized); 4055 /* Linearization changed the layout, re-evaluate: */ 4056 goto check_layout; 4057 } 4058 4059 *elements = __elements; 4060 /* Add the header: */ 4061 if (push_ok) { 4062 *hdr = skb_push(skb, hdr_len); 4063 return hdr_len; 4064 } 4065 4066 /* Fall back to cache element with known-good alignment: */ 4067 if (hdr_len + proto_len > QETH_HDR_CACHE_OBJ_SIZE) 4068 return -E2BIG; 4069 *hdr = kmem_cache_alloc(qeth_core_header_cache, gfp); 4070 if (!*hdr) 4071 return -ENOMEM; 4072 /* Copy protocol headers behind HW header: */ 4073 skb_copy_from_linear_data(skb, ((char *)*hdr) + hdr_len, proto_len); 4074 return 0; 4075 } 4076 4077 static bool qeth_iqd_may_bulk(struct qeth_qdio_out_q *queue, 4078 struct sk_buff *curr_skb, 4079 struct qeth_hdr *curr_hdr) 4080 { 4081 struct qeth_qdio_out_buffer *buffer = queue->bufs[queue->bulk_start]; 4082 struct qeth_hdr *prev_hdr = queue->prev_hdr; 4083 4084 if (!prev_hdr) 4085 return true; 4086 4087 /* All packets must have the same target: */ 4088 if (curr_hdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER2) { 4089 struct sk_buff *prev_skb = skb_peek(&buffer->skb_list); 4090 4091 return ether_addr_equal(eth_hdr(prev_skb)->h_dest, 4092 eth_hdr(curr_skb)->h_dest) && 4093 qeth_l2_same_vlan(&prev_hdr->hdr.l2, &curr_hdr->hdr.l2); 4094 } 4095 4096 return qeth_l3_same_next_hop(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3) && 4097 qeth_l3_iqd_same_vlan(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3); 4098 } 4099 4100 /** 4101 * qeth_fill_buffer() - map skb into an output buffer 4102 * @buf: buffer to transport the skb 4103 * @skb: skb to map into the buffer 4104 * @hdr: qeth_hdr for this skb. Either at skb->data, or allocated 4105 * from qeth_core_header_cache. 4106 * @offset: when mapping the skb, start at skb->data + offset 4107 * @hd_len: if > 0, build a dedicated header element of this size 4108 */ 4109 static unsigned int qeth_fill_buffer(struct qeth_qdio_out_buffer *buf, 4110 struct sk_buff *skb, struct qeth_hdr *hdr, 4111 unsigned int offset, unsigned int hd_len) 4112 { 4113 struct qdio_buffer *buffer = buf->buffer; 4114 int element = buf->next_element_to_fill; 4115 int length = skb_headlen(skb) - offset; 4116 char *data = skb->data + offset; 4117 unsigned int elem_length, cnt; 4118 bool is_first_elem = true; 4119 4120 __skb_queue_tail(&buf->skb_list, skb); 4121 4122 /* build dedicated element for HW Header */ 4123 if (hd_len) { 4124 is_first_elem = false; 4125 4126 buffer->element[element].addr = virt_to_phys(hdr); 4127 buffer->element[element].length = hd_len; 4128 buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG; 4129 4130 /* HW header is allocated from cache: */ 4131 if ((void *)hdr != skb->data) 4132 buf->is_header[element] = 1; 4133 /* HW header was pushed and is contiguous with linear part: */ 4134 else if (length > 0 && !PAGE_ALIGNED(data) && 4135 (data == (char *)hdr + hd_len)) 4136 buffer->element[element].eflags |= 4137 SBAL_EFLAGS_CONTIGUOUS; 4138 4139 element++; 4140 } 4141 4142 /* map linear part into buffer element(s) */ 4143 while (length > 0) { 4144 elem_length = min_t(unsigned int, length, 4145 PAGE_SIZE - offset_in_page(data)); 4146 4147 buffer->element[element].addr = virt_to_phys(data); 4148 buffer->element[element].length = elem_length; 4149 length -= elem_length; 4150 if (is_first_elem) { 4151 is_first_elem = false; 4152 if (length || skb_is_nonlinear(skb)) 4153 /* skb needs additional elements */ 4154 buffer->element[element].eflags = 4155 SBAL_EFLAGS_FIRST_FRAG; 4156 else 4157 buffer->element[element].eflags = 0; 4158 } else { 4159 buffer->element[element].eflags = 4160 SBAL_EFLAGS_MIDDLE_FRAG; 4161 } 4162 4163 data += elem_length; 4164 element++; 4165 } 4166 4167 /* map page frags into buffer element(s) */ 4168 for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) { 4169 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt]; 4170 4171 data = skb_frag_address(frag); 4172 length = skb_frag_size(frag); 4173 while (length > 0) { 4174 elem_length = min_t(unsigned int, length, 4175 PAGE_SIZE - offset_in_page(data)); 4176 4177 buffer->element[element].addr = virt_to_phys(data); 4178 buffer->element[element].length = elem_length; 4179 buffer->element[element].eflags = 4180 SBAL_EFLAGS_MIDDLE_FRAG; 4181 4182 length -= elem_length; 4183 data += elem_length; 4184 element++; 4185 } 4186 } 4187 4188 if (buffer->element[element - 1].eflags) 4189 buffer->element[element - 1].eflags = SBAL_EFLAGS_LAST_FRAG; 4190 buf->next_element_to_fill = element; 4191 return element; 4192 } 4193 4194 static int __qeth_xmit(struct qeth_card *card, struct qeth_qdio_out_q *queue, 4195 struct sk_buff *skb, unsigned int elements, 4196 struct qeth_hdr *hdr, unsigned int offset, 4197 unsigned int hd_len) 4198 { 4199 unsigned int bytes = qdisc_pkt_len(skb); 4200 struct qeth_qdio_out_buffer *buffer; 4201 unsigned int next_element; 4202 struct netdev_queue *txq; 4203 bool stopped = false; 4204 bool flush; 4205 4206 buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start + queue->bulk_count)]; 4207 txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb)); 4208 4209 /* Just a sanity check, the wake/stop logic should ensure that we always 4210 * get a free buffer. 4211 */ 4212 if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY) 4213 return -EBUSY; 4214 4215 flush = !qeth_iqd_may_bulk(queue, skb, hdr); 4216 4217 if (flush || 4218 (buffer->next_element_to_fill + elements > queue->max_elements)) { 4219 if (buffer->next_element_to_fill > 0) { 4220 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED); 4221 queue->bulk_count++; 4222 } 4223 4224 if (queue->bulk_count >= queue->bulk_max) 4225 flush = true; 4226 4227 if (flush) 4228 qeth_flush_queue(queue); 4229 4230 buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start + 4231 queue->bulk_count)]; 4232 4233 /* Sanity-check again: */ 4234 if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY) 4235 return -EBUSY; 4236 } 4237 4238 if (buffer->next_element_to_fill == 0 && 4239 atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) { 4240 /* If a TX completion happens right _here_ and misses to wake 4241 * the txq, then our re-check below will catch the race. 4242 */ 4243 QETH_TXQ_STAT_INC(queue, stopped); 4244 netif_tx_stop_queue(txq); 4245 stopped = true; 4246 } 4247 4248 next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len); 4249 buffer->bytes += bytes; 4250 buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1; 4251 queue->prev_hdr = hdr; 4252 4253 flush = __netdev_tx_sent_queue(txq, bytes, 4254 !stopped && netdev_xmit_more()); 4255 4256 if (flush || next_element >= queue->max_elements) { 4257 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED); 4258 queue->bulk_count++; 4259 4260 if (queue->bulk_count >= queue->bulk_max) 4261 flush = true; 4262 4263 if (flush) 4264 qeth_flush_queue(queue); 4265 } 4266 4267 if (stopped && !qeth_out_queue_is_full(queue)) 4268 netif_tx_start_queue(txq); 4269 return 0; 4270 } 4271 4272 int qeth_do_send_packet(struct qeth_card *card, struct qeth_qdio_out_q *queue, 4273 struct sk_buff *skb, struct qeth_hdr *hdr, 4274 unsigned int offset, unsigned int hd_len, 4275 int elements_needed) 4276 { 4277 unsigned int start_index = queue->next_buf_to_fill; 4278 struct qeth_qdio_out_buffer *buffer; 4279 unsigned int next_element; 4280 struct netdev_queue *txq; 4281 bool stopped = false; 4282 int flush_count = 0; 4283 int do_pack = 0; 4284 int rc = 0; 4285 4286 buffer = queue->bufs[queue->next_buf_to_fill]; 4287 4288 /* Just a sanity check, the wake/stop logic should ensure that we always 4289 * get a free buffer. 4290 */ 4291 if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY) 4292 return -EBUSY; 4293 4294 txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb)); 4295 4296 /* check if we need to switch packing state of this queue */ 4297 qeth_switch_to_packing_if_needed(queue); 4298 if (queue->do_pack) { 4299 do_pack = 1; 4300 /* does packet fit in current buffer? */ 4301 if (buffer->next_element_to_fill + elements_needed > 4302 queue->max_elements) { 4303 /* ... no -> set state PRIMED */ 4304 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED); 4305 flush_count++; 4306 queue->next_buf_to_fill = 4307 QDIO_BUFNR(queue->next_buf_to_fill + 1); 4308 buffer = queue->bufs[queue->next_buf_to_fill]; 4309 4310 /* We stepped forward, so sanity-check again: */ 4311 if (atomic_read(&buffer->state) != 4312 QETH_QDIO_BUF_EMPTY) { 4313 qeth_flush_buffers(queue, start_index, 4314 flush_count); 4315 rc = -EBUSY; 4316 goto out; 4317 } 4318 } 4319 } 4320 4321 if (buffer->next_element_to_fill == 0 && 4322 atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) { 4323 /* If a TX completion happens right _here_ and misses to wake 4324 * the txq, then our re-check below will catch the race. 4325 */ 4326 QETH_TXQ_STAT_INC(queue, stopped); 4327 netif_tx_stop_queue(txq); 4328 stopped = true; 4329 } 4330 4331 next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len); 4332 buffer->bytes += qdisc_pkt_len(skb); 4333 buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1; 4334 4335 if (queue->do_pack) 4336 QETH_TXQ_STAT_INC(queue, skbs_pack); 4337 if (!queue->do_pack || stopped || next_element >= queue->max_elements) { 4338 flush_count++; 4339 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED); 4340 queue->next_buf_to_fill = 4341 QDIO_BUFNR(queue->next_buf_to_fill + 1); 4342 } 4343 4344 if (flush_count) 4345 qeth_flush_buffers(queue, start_index, flush_count); 4346 4347 out: 4348 if (do_pack) 4349 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_count); 4350 4351 if (stopped && !qeth_out_queue_is_full(queue)) 4352 netif_tx_start_queue(txq); 4353 return rc; 4354 } 4355 EXPORT_SYMBOL_GPL(qeth_do_send_packet); 4356 4357 static void qeth_fill_tso_ext(struct qeth_hdr_tso *hdr, 4358 unsigned int payload_len, struct sk_buff *skb, 4359 unsigned int proto_len) 4360 { 4361 struct qeth_hdr_ext_tso *ext = &hdr->ext; 4362 4363 ext->hdr_tot_len = sizeof(*ext); 4364 ext->imb_hdr_no = 1; 4365 ext->hdr_type = 1; 4366 ext->hdr_version = 1; 4367 ext->hdr_len = 28; 4368 ext->payload_len = payload_len; 4369 ext->mss = skb_shinfo(skb)->gso_size; 4370 ext->dg_hdr_len = proto_len; 4371 } 4372 4373 int qeth_xmit(struct qeth_card *card, struct sk_buff *skb, 4374 struct qeth_qdio_out_q *queue, __be16 proto, 4375 void (*fill_header)(struct qeth_qdio_out_q *queue, 4376 struct qeth_hdr *hdr, struct sk_buff *skb, 4377 __be16 proto, unsigned int data_len)) 4378 { 4379 unsigned int proto_len, hw_hdr_len; 4380 unsigned int frame_len = skb->len; 4381 bool is_tso = skb_is_gso(skb); 4382 unsigned int data_offset = 0; 4383 struct qeth_hdr *hdr = NULL; 4384 unsigned int hd_len = 0; 4385 unsigned int elements; 4386 int push_len, rc; 4387 4388 if (is_tso) { 4389 hw_hdr_len = sizeof(struct qeth_hdr_tso); 4390 proto_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 4391 } else { 4392 hw_hdr_len = sizeof(struct qeth_hdr); 4393 proto_len = (IS_IQD(card) && IS_LAYER2(card)) ? ETH_HLEN : 0; 4394 } 4395 4396 rc = skb_cow_head(skb, hw_hdr_len); 4397 if (rc) 4398 return rc; 4399 4400 push_len = qeth_add_hw_header(queue, skb, &hdr, hw_hdr_len, proto_len, 4401 &elements); 4402 if (push_len < 0) 4403 return push_len; 4404 if (is_tso || !push_len) { 4405 /* HW header needs its own buffer element. */ 4406 hd_len = hw_hdr_len + proto_len; 4407 data_offset = push_len + proto_len; 4408 } 4409 memset(hdr, 0, hw_hdr_len); 4410 fill_header(queue, hdr, skb, proto, frame_len); 4411 if (is_tso) 4412 qeth_fill_tso_ext((struct qeth_hdr_tso *) hdr, 4413 frame_len - proto_len, skb, proto_len); 4414 4415 if (IS_IQD(card)) { 4416 rc = __qeth_xmit(card, queue, skb, elements, hdr, data_offset, 4417 hd_len); 4418 } else { 4419 /* TODO: drop skb_orphan() once TX completion is fast enough */ 4420 skb_orphan(skb); 4421 spin_lock(&queue->lock); 4422 rc = qeth_do_send_packet(card, queue, skb, hdr, data_offset, 4423 hd_len, elements); 4424 spin_unlock(&queue->lock); 4425 } 4426 4427 if (rc && !push_len) 4428 kmem_cache_free(qeth_core_header_cache, hdr); 4429 4430 return rc; 4431 } 4432 EXPORT_SYMBOL_GPL(qeth_xmit); 4433 4434 static int qeth_setadp_promisc_mode_cb(struct qeth_card *card, 4435 struct qeth_reply *reply, unsigned long data) 4436 { 4437 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; 4438 struct qeth_ipacmd_setadpparms *setparms; 4439 4440 QETH_CARD_TEXT(card, 4, "prmadpcb"); 4441 4442 setparms = &(cmd->data.setadapterparms); 4443 if (qeth_setadpparms_inspect_rc(cmd)) { 4444 QETH_CARD_TEXT_(card, 4, "prmrc%x", cmd->hdr.return_code); 4445 setparms->data.mode = SET_PROMISC_MODE_OFF; 4446 } 4447 card->info.promisc_mode = setparms->data.mode; 4448 return (cmd->hdr.return_code) ? -EIO : 0; 4449 } 4450 4451 void qeth_setadp_promisc_mode(struct qeth_card *card, bool enable) 4452 { 4453 enum qeth_ipa_promisc_modes mode = enable ? SET_PROMISC_MODE_ON : 4454 SET_PROMISC_MODE_OFF; 4455 struct qeth_cmd_buffer *iob; 4456 struct qeth_ipa_cmd *cmd; 4457 4458 QETH_CARD_TEXT(card, 4, "setprom"); 4459 QETH_CARD_TEXT_(card, 4, "mode:%x", mode); 4460 4461 iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE, 4462 SETADP_DATA_SIZEOF(mode)); 4463 if (!iob) 4464 return; 4465 cmd = __ipa_cmd(iob); 4466 cmd->data.setadapterparms.data.mode = mode; 4467 qeth_send_ipa_cmd(card, iob, qeth_setadp_promisc_mode_cb, NULL); 4468 } 4469 EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode); 4470 4471 static int qeth_setadpparms_change_macaddr_cb(struct qeth_card *card, 4472 struct qeth_reply *reply, unsigned long data) 4473 { 4474 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; 4475 struct qeth_ipacmd_setadpparms *adp_cmd; 4476 4477 QETH_CARD_TEXT(card, 4, "chgmaccb"); 4478 if (qeth_setadpparms_inspect_rc(cmd)) 4479 return -EIO; 4480 4481 adp_cmd = &cmd->data.setadapterparms; 4482 if (!is_valid_ether_addr(adp_cmd->data.change_addr.addr)) 4483 return -EADDRNOTAVAIL; 4484 4485 if (IS_LAYER2(card) && IS_OSD(card) && !IS_VM_NIC(card) && 4486 !(adp_cmd->hdr.flags & QETH_SETADP_FLAGS_VIRTUAL_MAC)) 4487 return -EADDRNOTAVAIL; 4488 4489 ether_addr_copy(card->dev->dev_addr, adp_cmd->data.change_addr.addr); 4490 return 0; 4491 } 4492 4493 int qeth_setadpparms_change_macaddr(struct qeth_card *card) 4494 { 4495 int rc; 4496 struct qeth_cmd_buffer *iob; 4497 struct qeth_ipa_cmd *cmd; 4498 4499 QETH_CARD_TEXT(card, 4, "chgmac"); 4500 4501 iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS, 4502 SETADP_DATA_SIZEOF(change_addr)); 4503 if (!iob) 4504 return -ENOMEM; 4505 cmd = __ipa_cmd(iob); 4506 cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC; 4507 cmd->data.setadapterparms.data.change_addr.addr_size = ETH_ALEN; 4508 ether_addr_copy(cmd->data.setadapterparms.data.change_addr.addr, 4509 card->dev->dev_addr); 4510 rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_change_macaddr_cb, 4511 NULL); 4512 return rc; 4513 } 4514 EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr); 4515 4516 static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card, 4517 struct qeth_reply *reply, unsigned long data) 4518 { 4519 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; 4520 struct qeth_set_access_ctrl *access_ctrl_req; 4521 4522 QETH_CARD_TEXT(card, 4, "setaccb"); 4523 4524 access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl; 4525 QETH_CARD_TEXT_(card, 2, "rc=%d", 4526 cmd->data.setadapterparms.hdr.return_code); 4527 if (cmd->data.setadapterparms.hdr.return_code != 4528 SET_ACCESS_CTRL_RC_SUCCESS) 4529 QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%#x) on device %x: %#x\n", 4530 access_ctrl_req->subcmd_code, CARD_DEVID(card), 4531 cmd->data.setadapterparms.hdr.return_code); 4532 switch (qeth_setadpparms_inspect_rc(cmd)) { 4533 case SET_ACCESS_CTRL_RC_SUCCESS: 4534 if (access_ctrl_req->subcmd_code == ISOLATION_MODE_NONE) 4535 dev_info(&card->gdev->dev, 4536 "QDIO data connection isolation is deactivated\n"); 4537 else 4538 dev_info(&card->gdev->dev, 4539 "QDIO data connection isolation is activated\n"); 4540 return 0; 4541 case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED: 4542 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already deactivated\n", 4543 CARD_DEVID(card)); 4544 return 0; 4545 case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED: 4546 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already activated\n", 4547 CARD_DEVID(card)); 4548 return 0; 4549 case SET_ACCESS_CTRL_RC_NOT_SUPPORTED: 4550 dev_err(&card->gdev->dev, "Adapter does not " 4551 "support QDIO data connection isolation\n"); 4552 return -EOPNOTSUPP; 4553 case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER: 4554 dev_err(&card->gdev->dev, 4555 "Adapter is dedicated. " 4556 "QDIO data connection isolation not supported\n"); 4557 return -EOPNOTSUPP; 4558 case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF: 4559 dev_err(&card->gdev->dev, 4560 "TSO does not permit QDIO data connection isolation\n"); 4561 return -EPERM; 4562 case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED: 4563 dev_err(&card->gdev->dev, "The adjacent switch port does not " 4564 "support reflective relay mode\n"); 4565 return -EOPNOTSUPP; 4566 case SET_ACCESS_CTRL_RC_REFLREL_FAILED: 4567 dev_err(&card->gdev->dev, "The reflective relay mode cannot be " 4568 "enabled at the adjacent switch port"); 4569 return -EREMOTEIO; 4570 case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED: 4571 dev_warn(&card->gdev->dev, "Turning off reflective relay mode " 4572 "at the adjacent switch failed\n"); 4573 /* benign error while disabling ISOLATION_MODE_FWD */ 4574 return 0; 4575 default: 4576 return -EIO; 4577 } 4578 } 4579 4580 int qeth_setadpparms_set_access_ctrl(struct qeth_card *card, 4581 enum qeth_ipa_isolation_modes mode) 4582 { 4583 int rc; 4584 struct qeth_cmd_buffer *iob; 4585 struct qeth_ipa_cmd *cmd; 4586 struct qeth_set_access_ctrl *access_ctrl_req; 4587 4588 QETH_CARD_TEXT(card, 4, "setacctl"); 4589 4590 if (!qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) { 4591 dev_err(&card->gdev->dev, 4592 "Adapter does not support QDIO data connection isolation\n"); 4593 return -EOPNOTSUPP; 4594 } 4595 4596 iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL, 4597 SETADP_DATA_SIZEOF(set_access_ctrl)); 4598 if (!iob) 4599 return -ENOMEM; 4600 cmd = __ipa_cmd(iob); 4601 access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl; 4602 access_ctrl_req->subcmd_code = mode; 4603 4604 rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb, 4605 NULL); 4606 if (rc) { 4607 QETH_CARD_TEXT_(card, 2, "rc=%d", rc); 4608 QETH_DBF_MESSAGE(3, "IPA(SET_ACCESS_CTRL(%d) on device %x: sent failed\n", 4609 rc, CARD_DEVID(card)); 4610 } 4611 4612 return rc; 4613 } 4614 4615 void qeth_tx_timeout(struct net_device *dev, unsigned int txqueue) 4616 { 4617 struct qeth_card *card; 4618 4619 card = dev->ml_priv; 4620 QETH_CARD_TEXT(card, 4, "txtimeo"); 4621 qeth_schedule_recovery(card); 4622 } 4623 EXPORT_SYMBOL_GPL(qeth_tx_timeout); 4624 4625 static int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum) 4626 { 4627 struct qeth_card *card = dev->ml_priv; 4628 int rc = 0; 4629 4630 switch (regnum) { 4631 case MII_BMCR: /* Basic mode control register */ 4632 rc = BMCR_FULLDPLX; 4633 if ((card->info.link_type != QETH_LINK_TYPE_GBIT_ETH) && 4634 (card->info.link_type != QETH_LINK_TYPE_OSN) && 4635 (card->info.link_type != QETH_LINK_TYPE_10GBIT_ETH) && 4636 (card->info.link_type != QETH_LINK_TYPE_25GBIT_ETH)) 4637 rc |= BMCR_SPEED100; 4638 break; 4639 case MII_BMSR: /* Basic mode status register */ 4640 rc = BMSR_ERCAP | BMSR_ANEGCOMPLETE | BMSR_LSTATUS | 4641 BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL | 4642 BMSR_100BASE4; 4643 break; 4644 case MII_PHYSID1: /* PHYS ID 1 */ 4645 rc = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 8) | 4646 dev->dev_addr[2]; 4647 rc = (rc >> 5) & 0xFFFF; 4648 break; 4649 case MII_PHYSID2: /* PHYS ID 2 */ 4650 rc = (dev->dev_addr[2] << 10) & 0xFFFF; 4651 break; 4652 case MII_ADVERTISE: /* Advertisement control reg */ 4653 rc = ADVERTISE_ALL; 4654 break; 4655 case MII_LPA: /* Link partner ability reg */ 4656 rc = LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL | 4657 LPA_100BASE4 | LPA_LPACK; 4658 break; 4659 case MII_EXPANSION: /* Expansion register */ 4660 break; 4661 case MII_DCOUNTER: /* disconnect counter */ 4662 break; 4663 case MII_FCSCOUNTER: /* false carrier counter */ 4664 break; 4665 case MII_NWAYTEST: /* N-way auto-neg test register */ 4666 break; 4667 case MII_RERRCOUNTER: /* rx error counter */ 4668 rc = card->stats.rx_length_errors + 4669 card->stats.rx_frame_errors + 4670 card->stats.rx_fifo_errors; 4671 break; 4672 case MII_SREVISION: /* silicon revision */ 4673 break; 4674 case MII_RESV1: /* reserved 1 */ 4675 break; 4676 case MII_LBRERROR: /* loopback, rx, bypass error */ 4677 break; 4678 case MII_PHYADDR: /* physical address */ 4679 break; 4680 case MII_RESV2: /* reserved 2 */ 4681 break; 4682 case MII_TPISTATUS: /* TPI status for 10mbps */ 4683 break; 4684 case MII_NCONFIG: /* network interface config */ 4685 break; 4686 default: 4687 break; 4688 } 4689 return rc; 4690 } 4691 4692 static int qeth_snmp_command_cb(struct qeth_card *card, 4693 struct qeth_reply *reply, unsigned long data) 4694 { 4695 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; 4696 struct qeth_arp_query_info *qinfo = reply->param; 4697 struct qeth_ipacmd_setadpparms *adp_cmd; 4698 unsigned int data_len; 4699 void *snmp_data; 4700 4701 QETH_CARD_TEXT(card, 3, "snpcmdcb"); 4702 4703 if (cmd->hdr.return_code) { 4704 QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code); 4705 return -EIO; 4706 } 4707 if (cmd->data.setadapterparms.hdr.return_code) { 4708 cmd->hdr.return_code = 4709 cmd->data.setadapterparms.hdr.return_code; 4710 QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code); 4711 return -EIO; 4712 } 4713 4714 adp_cmd = &cmd->data.setadapterparms; 4715 data_len = adp_cmd->hdr.cmdlength - sizeof(adp_cmd->hdr); 4716 if (adp_cmd->hdr.seq_no == 1) { 4717 snmp_data = &adp_cmd->data.snmp; 4718 } else { 4719 snmp_data = &adp_cmd->data.snmp.request; 4720 data_len -= offsetof(struct qeth_snmp_cmd, request); 4721 } 4722 4723 /* check if there is enough room in userspace */ 4724 if ((qinfo->udata_len - qinfo->udata_offset) < data_len) { 4725 QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOSPC); 4726 return -ENOSPC; 4727 } 4728 QETH_CARD_TEXT_(card, 4, "snore%i", 4729 cmd->data.setadapterparms.hdr.used_total); 4730 QETH_CARD_TEXT_(card, 4, "sseqn%i", 4731 cmd->data.setadapterparms.hdr.seq_no); 4732 /*copy entries to user buffer*/ 4733 memcpy(qinfo->udata + qinfo->udata_offset, snmp_data, data_len); 4734 qinfo->udata_offset += data_len; 4735 4736 if (cmd->data.setadapterparms.hdr.seq_no < 4737 cmd->data.setadapterparms.hdr.used_total) 4738 return 1; 4739 return 0; 4740 } 4741 4742 static int qeth_snmp_command(struct qeth_card *card, char __user *udata) 4743 { 4744 struct qeth_snmp_ureq __user *ureq; 4745 struct qeth_cmd_buffer *iob; 4746 unsigned int req_len; 4747 struct qeth_arp_query_info qinfo = {0, }; 4748 int rc = 0; 4749 4750 QETH_CARD_TEXT(card, 3, "snmpcmd"); 4751 4752 if (IS_VM_NIC(card)) 4753 return -EOPNOTSUPP; 4754 4755 if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) && 4756 IS_LAYER3(card)) 4757 return -EOPNOTSUPP; 4758 4759 ureq = (struct qeth_snmp_ureq __user *) udata; 4760 if (get_user(qinfo.udata_len, &ureq->hdr.data_len) || 4761 get_user(req_len, &ureq->hdr.req_len)) 4762 return -EFAULT; 4763 4764 /* Sanitize user input, to avoid overflows in iob size calculation: */ 4765 if (req_len > QETH_BUFSIZE) 4766 return -EINVAL; 4767 4768 iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL, req_len); 4769 if (!iob) 4770 return -ENOMEM; 4771 4772 if (copy_from_user(&__ipa_cmd(iob)->data.setadapterparms.data.snmp, 4773 &ureq->cmd, req_len)) { 4774 qeth_put_cmd(iob); 4775 return -EFAULT; 4776 } 4777 4778 qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL); 4779 if (!qinfo.udata) { 4780 qeth_put_cmd(iob); 4781 return -ENOMEM; 4782 } 4783 qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr); 4784 4785 rc = qeth_send_ipa_cmd(card, iob, qeth_snmp_command_cb, &qinfo); 4786 if (rc) 4787 QETH_DBF_MESSAGE(2, "SNMP command failed on device %x: (%#x)\n", 4788 CARD_DEVID(card), rc); 4789 else { 4790 if (copy_to_user(udata, qinfo.udata, qinfo.udata_len)) 4791 rc = -EFAULT; 4792 } 4793 4794 kfree(qinfo.udata); 4795 return rc; 4796 } 4797 4798 static int qeth_setadpparms_query_oat_cb(struct qeth_card *card, 4799 struct qeth_reply *reply, 4800 unsigned long data) 4801 { 4802 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data; 4803 struct qeth_qoat_priv *priv = reply->param; 4804 int resdatalen; 4805 4806 QETH_CARD_TEXT(card, 3, "qoatcb"); 4807 if (qeth_setadpparms_inspect_rc(cmd)) 4808 return -EIO; 4809 4810 resdatalen = cmd->data.setadapterparms.hdr.cmdlength; 4811 4812 if (resdatalen > (priv->buffer_len - priv->response_len)) 4813 return -ENOSPC; 4814 4815 memcpy(priv->buffer + priv->response_len, 4816 &cmd->data.setadapterparms.hdr, resdatalen); 4817 priv->response_len += resdatalen; 4818 4819 if (cmd->data.setadapterparms.hdr.seq_no < 4820 cmd->data.setadapterparms.hdr.used_total) 4821 return 1; 4822 return 0; 4823 } 4824 4825 static int qeth_query_oat_command(struct qeth_card *card, char __user *udata) 4826 { 4827 int rc = 0; 4828 struct qeth_cmd_buffer *iob; 4829 struct qeth_ipa_cmd *cmd; 4830 struct qeth_query_oat *oat_req; 4831 struct qeth_query_oat_data oat_data; 4832 struct qeth_qoat_priv priv; 4833 void __user *tmp; 4834 4835 QETH_CARD_TEXT(card, 3, "qoatcmd"); 4836 4837 if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT)) 4838 return -EOPNOTSUPP; 4839 4840 if (copy_from_user(&oat_data, udata, sizeof(oat_data))) 4841 return -EFAULT; 4842 4843 priv.buffer_len = oat_data.buffer_len; 4844 priv.response_len = 0; 4845 priv.buffer = vzalloc(oat_data.buffer_len); 4846 if (!priv.buffer) 4847 return -ENOMEM; 4848 4849 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT, 4850 SETADP_DATA_SIZEOF(query_oat)); 4851 if (!iob) { 4852 rc = -ENOMEM; 4853 goto out_free; 4854 } 4855 cmd = __ipa_cmd(iob); 4856 oat_req = &cmd->data.setadapterparms.data.query_oat; 4857 oat_req->subcmd_code = oat_data.command; 4858 4859 rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb, &priv); 4860 if (!rc) { 4861 tmp = is_compat_task() ? compat_ptr(oat_data.ptr) : 4862 u64_to_user_ptr(oat_data.ptr); 4863 oat_data.response_len = priv.response_len; 4864 4865 if (copy_to_user(tmp, priv.buffer, priv.response_len) || 4866 copy_to_user(udata, &oat_data, sizeof(oat_data))) 4867 rc = -EFAULT; 4868 } 4869 4870 out_free: 4871 vfree(priv.buffer); 4872 return rc; 4873 } 4874 4875 static int qeth_query_card_info_cb(struct qeth_card *card, 4876 struct qeth_reply *reply, unsigned long data) 4877 { 4878 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data; 4879 struct qeth_link_info *link_info = reply->param; 4880 struct qeth_query_card_info *card_info; 4881 4882 QETH_CARD_TEXT(card, 2, "qcrdincb"); 4883 if (qeth_setadpparms_inspect_rc(cmd)) 4884 return -EIO; 4885 4886 card_info = &cmd->data.setadapterparms.data.card_info; 4887 netdev_dbg(card->dev, 4888 "card info: card_type=0x%02x, port_mode=0x%04x, port_speed=0x%08x\n", 4889 card_info->card_type, card_info->port_mode, 4890 card_info->port_speed); 4891 4892 switch (card_info->port_mode) { 4893 case CARD_INFO_PORTM_FULLDUPLEX: 4894 link_info->duplex = DUPLEX_FULL; 4895 break; 4896 case CARD_INFO_PORTM_HALFDUPLEX: 4897 link_info->duplex = DUPLEX_HALF; 4898 break; 4899 default: 4900 link_info->duplex = DUPLEX_UNKNOWN; 4901 } 4902 4903 switch (card_info->card_type) { 4904 case CARD_INFO_TYPE_1G_COPPER_A: 4905 case CARD_INFO_TYPE_1G_COPPER_B: 4906 link_info->speed = SPEED_1000; 4907 link_info->port = PORT_TP; 4908 break; 4909 case CARD_INFO_TYPE_1G_FIBRE_A: 4910 case CARD_INFO_TYPE_1G_FIBRE_B: 4911 link_info->speed = SPEED_1000; 4912 link_info->port = PORT_FIBRE; 4913 break; 4914 case CARD_INFO_TYPE_10G_FIBRE_A: 4915 case CARD_INFO_TYPE_10G_FIBRE_B: 4916 link_info->speed = SPEED_10000; 4917 link_info->port = PORT_FIBRE; 4918 break; 4919 default: 4920 switch (card_info->port_speed) { 4921 case CARD_INFO_PORTS_10M: 4922 link_info->speed = SPEED_10; 4923 break; 4924 case CARD_INFO_PORTS_100M: 4925 link_info->speed = SPEED_100; 4926 break; 4927 case CARD_INFO_PORTS_1G: 4928 link_info->speed = SPEED_1000; 4929 break; 4930 case CARD_INFO_PORTS_10G: 4931 link_info->speed = SPEED_10000; 4932 break; 4933 case CARD_INFO_PORTS_25G: 4934 link_info->speed = SPEED_25000; 4935 break; 4936 default: 4937 link_info->speed = SPEED_UNKNOWN; 4938 } 4939 4940 link_info->port = PORT_OTHER; 4941 } 4942 4943 return 0; 4944 } 4945 4946 int qeth_query_card_info(struct qeth_card *card, 4947 struct qeth_link_info *link_info) 4948 { 4949 struct qeth_cmd_buffer *iob; 4950 4951 QETH_CARD_TEXT(card, 2, "qcrdinfo"); 4952 if (!qeth_adp_supported(card, IPA_SETADP_QUERY_CARD_INFO)) 4953 return -EOPNOTSUPP; 4954 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_CARD_INFO, 0); 4955 if (!iob) 4956 return -ENOMEM; 4957 4958 return qeth_send_ipa_cmd(card, iob, qeth_query_card_info_cb, link_info); 4959 } 4960 4961 static int qeth_init_link_info_oat_cb(struct qeth_card *card, 4962 struct qeth_reply *reply_priv, 4963 unsigned long data) 4964 { 4965 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data; 4966 struct qeth_link_info *link_info = reply_priv->param; 4967 struct qeth_query_oat_physical_if *phys_if; 4968 struct qeth_query_oat_reply *reply; 4969 4970 if (qeth_setadpparms_inspect_rc(cmd)) 4971 return -EIO; 4972 4973 /* Multi-part reply is unexpected, don't bother: */ 4974 if (cmd->data.setadapterparms.hdr.used_total > 1) 4975 return -EINVAL; 4976 4977 /* Expect the reply to start with phys_if data: */ 4978 reply = &cmd->data.setadapterparms.data.query_oat.reply[0]; 4979 if (reply->type != QETH_QOAT_REPLY_TYPE_PHYS_IF || 4980 reply->length < sizeof(*reply)) 4981 return -EINVAL; 4982 4983 phys_if = &reply->phys_if; 4984 4985 switch (phys_if->speed_duplex) { 4986 case QETH_QOAT_PHYS_SPEED_10M_HALF: 4987 link_info->speed = SPEED_10; 4988 link_info->duplex = DUPLEX_HALF; 4989 break; 4990 case QETH_QOAT_PHYS_SPEED_10M_FULL: 4991 link_info->speed = SPEED_10; 4992 link_info->duplex = DUPLEX_FULL; 4993 break; 4994 case QETH_QOAT_PHYS_SPEED_100M_HALF: 4995 link_info->speed = SPEED_100; 4996 link_info->duplex = DUPLEX_HALF; 4997 break; 4998 case QETH_QOAT_PHYS_SPEED_100M_FULL: 4999 link_info->speed = SPEED_100; 5000 link_info->duplex = DUPLEX_FULL; 5001 break; 5002 case QETH_QOAT_PHYS_SPEED_1000M_HALF: 5003 link_info->speed = SPEED_1000; 5004 link_info->duplex = DUPLEX_HALF; 5005 break; 5006 case QETH_QOAT_PHYS_SPEED_1000M_FULL: 5007 link_info->speed = SPEED_1000; 5008 link_info->duplex = DUPLEX_FULL; 5009 break; 5010 case QETH_QOAT_PHYS_SPEED_10G_FULL: 5011 link_info->speed = SPEED_10000; 5012 link_info->duplex = DUPLEX_FULL; 5013 break; 5014 case QETH_QOAT_PHYS_SPEED_25G_FULL: 5015 link_info->speed = SPEED_25000; 5016 link_info->duplex = DUPLEX_FULL; 5017 break; 5018 case QETH_QOAT_PHYS_SPEED_UNKNOWN: 5019 default: 5020 link_info->speed = SPEED_UNKNOWN; 5021 link_info->duplex = DUPLEX_UNKNOWN; 5022 break; 5023 } 5024 5025 switch (phys_if->media_type) { 5026 case QETH_QOAT_PHYS_MEDIA_COPPER: 5027 link_info->port = PORT_TP; 5028 link_info->link_mode = QETH_LINK_MODE_UNKNOWN; 5029 break; 5030 case QETH_QOAT_PHYS_MEDIA_FIBRE_SHORT: 5031 link_info->port = PORT_FIBRE; 5032 link_info->link_mode = QETH_LINK_MODE_FIBRE_SHORT; 5033 break; 5034 case QETH_QOAT_PHYS_MEDIA_FIBRE_LONG: 5035 link_info->port = PORT_FIBRE; 5036 link_info->link_mode = QETH_LINK_MODE_FIBRE_LONG; 5037 break; 5038 default: 5039 link_info->port = PORT_OTHER; 5040 link_info->link_mode = QETH_LINK_MODE_UNKNOWN; 5041 break; 5042 } 5043 5044 return 0; 5045 } 5046 5047 static void qeth_init_link_info(struct qeth_card *card) 5048 { 5049 card->info.link_info.duplex = DUPLEX_FULL; 5050 5051 if (IS_IQD(card) || IS_VM_NIC(card)) { 5052 card->info.link_info.speed = SPEED_10000; 5053 card->info.link_info.port = PORT_FIBRE; 5054 card->info.link_info.link_mode = QETH_LINK_MODE_FIBRE_SHORT; 5055 } else { 5056 switch (card->info.link_type) { 5057 case QETH_LINK_TYPE_FAST_ETH: 5058 case QETH_LINK_TYPE_LANE_ETH100: 5059 card->info.link_info.speed = SPEED_100; 5060 card->info.link_info.port = PORT_TP; 5061 break; 5062 case QETH_LINK_TYPE_GBIT_ETH: 5063 case QETH_LINK_TYPE_LANE_ETH1000: 5064 card->info.link_info.speed = SPEED_1000; 5065 card->info.link_info.port = PORT_FIBRE; 5066 break; 5067 case QETH_LINK_TYPE_10GBIT_ETH: 5068 card->info.link_info.speed = SPEED_10000; 5069 card->info.link_info.port = PORT_FIBRE; 5070 break; 5071 case QETH_LINK_TYPE_25GBIT_ETH: 5072 card->info.link_info.speed = SPEED_25000; 5073 card->info.link_info.port = PORT_FIBRE; 5074 break; 5075 default: 5076 dev_info(&card->gdev->dev, "Unknown link type %x\n", 5077 card->info.link_type); 5078 card->info.link_info.speed = SPEED_UNKNOWN; 5079 card->info.link_info.port = PORT_OTHER; 5080 } 5081 5082 card->info.link_info.link_mode = QETH_LINK_MODE_UNKNOWN; 5083 } 5084 5085 /* Get more accurate data via QUERY OAT: */ 5086 if (qeth_adp_supported(card, IPA_SETADP_QUERY_OAT)) { 5087 struct qeth_link_info link_info; 5088 struct qeth_cmd_buffer *iob; 5089 5090 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT, 5091 SETADP_DATA_SIZEOF(query_oat)); 5092 if (iob) { 5093 struct qeth_ipa_cmd *cmd = __ipa_cmd(iob); 5094 struct qeth_query_oat *oat_req; 5095 5096 oat_req = &cmd->data.setadapterparms.data.query_oat; 5097 oat_req->subcmd_code = QETH_QOAT_SCOPE_INTERFACE; 5098 5099 if (!qeth_send_ipa_cmd(card, iob, 5100 qeth_init_link_info_oat_cb, 5101 &link_info)) { 5102 if (link_info.speed != SPEED_UNKNOWN) 5103 card->info.link_info.speed = link_info.speed; 5104 if (link_info.duplex != DUPLEX_UNKNOWN) 5105 card->info.link_info.duplex = link_info.duplex; 5106 if (link_info.port != PORT_OTHER) 5107 card->info.link_info.port = link_info.port; 5108 if (link_info.link_mode != QETH_LINK_MODE_UNKNOWN) 5109 card->info.link_info.link_mode = link_info.link_mode; 5110 } 5111 } 5112 } 5113 } 5114 5115 /** 5116 * qeth_vm_request_mac() - Request a hypervisor-managed MAC address 5117 * @card: pointer to a qeth_card 5118 * 5119 * Returns 5120 * 0, if a MAC address has been set for the card's netdevice 5121 * a return code, for various error conditions 5122 */ 5123 int qeth_vm_request_mac(struct qeth_card *card) 5124 { 5125 struct diag26c_mac_resp *response; 5126 struct diag26c_mac_req *request; 5127 int rc; 5128 5129 QETH_CARD_TEXT(card, 2, "vmreqmac"); 5130 5131 request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA); 5132 response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA); 5133 if (!request || !response) { 5134 rc = -ENOMEM; 5135 goto out; 5136 } 5137 5138 request->resp_buf_len = sizeof(*response); 5139 request->resp_version = DIAG26C_VERSION2; 5140 request->op_code = DIAG26C_GET_MAC; 5141 request->devno = card->info.ddev_devno; 5142 5143 QETH_DBF_HEX(CTRL, 2, request, sizeof(*request)); 5144 rc = diag26c(request, response, DIAG26C_MAC_SERVICES); 5145 QETH_DBF_HEX(CTRL, 2, request, sizeof(*request)); 5146 if (rc) 5147 goto out; 5148 QETH_DBF_HEX(CTRL, 2, response, sizeof(*response)); 5149 5150 if (request->resp_buf_len < sizeof(*response) || 5151 response->version != request->resp_version) { 5152 rc = -EIO; 5153 QETH_CARD_TEXT(card, 2, "badresp"); 5154 QETH_CARD_HEX(card, 2, &request->resp_buf_len, 5155 sizeof(request->resp_buf_len)); 5156 } else if (!is_valid_ether_addr(response->mac)) { 5157 rc = -EINVAL; 5158 QETH_CARD_TEXT(card, 2, "badmac"); 5159 QETH_CARD_HEX(card, 2, response->mac, ETH_ALEN); 5160 } else { 5161 ether_addr_copy(card->dev->dev_addr, response->mac); 5162 } 5163 5164 out: 5165 kfree(response); 5166 kfree(request); 5167 return rc; 5168 } 5169 EXPORT_SYMBOL_GPL(qeth_vm_request_mac); 5170 5171 static void qeth_determine_capabilities(struct qeth_card *card) 5172 { 5173 struct qeth_channel *channel = &card->data; 5174 struct ccw_device *ddev = channel->ccwdev; 5175 int rc; 5176 int ddev_offline = 0; 5177 5178 QETH_CARD_TEXT(card, 2, "detcapab"); 5179 if (!ddev->online) { 5180 ddev_offline = 1; 5181 rc = qeth_start_channel(channel); 5182 if (rc) { 5183 QETH_CARD_TEXT_(card, 2, "3err%d", rc); 5184 goto out; 5185 } 5186 } 5187 5188 rc = qeth_read_conf_data(card); 5189 if (rc) { 5190 QETH_DBF_MESSAGE(2, "qeth_read_conf_data on device %x returned %i\n", 5191 CARD_DEVID(card), rc); 5192 QETH_CARD_TEXT_(card, 2, "5err%d", rc); 5193 goto out_offline; 5194 } 5195 5196 rc = qdio_get_ssqd_desc(ddev, &card->ssqd); 5197 if (rc) 5198 QETH_CARD_TEXT_(card, 2, "6err%d", rc); 5199 5200 QETH_CARD_TEXT_(card, 2, "qfmt%d", card->ssqd.qfmt); 5201 QETH_CARD_TEXT_(card, 2, "ac1:%02x", card->ssqd.qdioac1); 5202 QETH_CARD_TEXT_(card, 2, "ac2:%04x", card->ssqd.qdioac2); 5203 QETH_CARD_TEXT_(card, 2, "ac3:%04x", card->ssqd.qdioac3); 5204 QETH_CARD_TEXT_(card, 2, "icnt%d", card->ssqd.icnt); 5205 if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) || 5206 ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) || 5207 ((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) { 5208 dev_info(&card->gdev->dev, 5209 "Completion Queueing supported\n"); 5210 } else { 5211 card->options.cq = QETH_CQ_NOTAVAILABLE; 5212 } 5213 5214 out_offline: 5215 if (ddev_offline == 1) 5216 qeth_stop_channel(channel); 5217 out: 5218 return; 5219 } 5220 5221 static void qeth_read_ccw_conf_data(struct qeth_card *card) 5222 { 5223 struct qeth_card_info *info = &card->info; 5224 struct ccw_device *cdev = CARD_DDEV(card); 5225 struct ccw_dev_id dev_id; 5226 5227 QETH_CARD_TEXT(card, 2, "ccwconfd"); 5228 ccw_device_get_id(cdev, &dev_id); 5229 5230 info->ddev_devno = dev_id.devno; 5231 info->ids_valid = !ccw_device_get_cssid(cdev, &info->cssid) && 5232 !ccw_device_get_iid(cdev, &info->iid) && 5233 !ccw_device_get_chid(cdev, 0, &info->chid); 5234 info->ssid = dev_id.ssid; 5235 5236 dev_info(&card->gdev->dev, "CHID: %x CHPID: %x\n", 5237 info->chid, info->chpid); 5238 5239 QETH_CARD_TEXT_(card, 3, "devn%x", info->ddev_devno); 5240 QETH_CARD_TEXT_(card, 3, "cssid:%x", info->cssid); 5241 QETH_CARD_TEXT_(card, 3, "iid:%x", info->iid); 5242 QETH_CARD_TEXT_(card, 3, "ssid:%x", info->ssid); 5243 QETH_CARD_TEXT_(card, 3, "chpid:%x", info->chpid); 5244 QETH_CARD_TEXT_(card, 3, "chid:%x", info->chid); 5245 QETH_CARD_TEXT_(card, 3, "idval%x", info->ids_valid); 5246 } 5247 5248 static int qeth_qdio_establish(struct qeth_card *card) 5249 { 5250 struct qdio_buffer **out_sbal_ptrs[QETH_MAX_OUT_QUEUES]; 5251 struct qdio_buffer **in_sbal_ptrs[QETH_MAX_IN_QUEUES]; 5252 struct qeth_qib_parms *qib_parms = NULL; 5253 struct qdio_initialize init_data; 5254 unsigned int i; 5255 int rc = 0; 5256 5257 QETH_CARD_TEXT(card, 2, "qdioest"); 5258 5259 if (!IS_IQD(card) && !IS_VM_NIC(card)) { 5260 qib_parms = kzalloc(sizeof_field(struct qib, parm), GFP_KERNEL); 5261 if (!qib_parms) 5262 return -ENOMEM; 5263 5264 qeth_fill_qib_parms(card, qib_parms); 5265 } 5266 5267 in_sbal_ptrs[0] = card->qdio.in_q->qdio_bufs; 5268 if (card->options.cq == QETH_CQ_ENABLED) 5269 in_sbal_ptrs[1] = card->qdio.c_q->qdio_bufs; 5270 5271 for (i = 0; i < card->qdio.no_out_queues; i++) 5272 out_sbal_ptrs[i] = card->qdio.out_qs[i]->qdio_bufs; 5273 5274 memset(&init_data, 0, sizeof(struct qdio_initialize)); 5275 init_data.q_format = IS_IQD(card) ? QDIO_IQDIO_QFMT : 5276 QDIO_QETH_QFMT; 5277 init_data.qib_param_field_format = 0; 5278 init_data.qib_param_field = (void *)qib_parms; 5279 init_data.no_input_qs = card->qdio.no_in_queues; 5280 init_data.no_output_qs = card->qdio.no_out_queues; 5281 init_data.input_handler = qeth_qdio_input_handler; 5282 init_data.output_handler = qeth_qdio_output_handler; 5283 init_data.irq_poll = qeth_qdio_poll; 5284 init_data.int_parm = (unsigned long) card; 5285 init_data.input_sbal_addr_array = in_sbal_ptrs; 5286 init_data.output_sbal_addr_array = out_sbal_ptrs; 5287 init_data.output_sbal_state_array = card->qdio.out_bufstates; 5288 init_data.scan_threshold = IS_IQD(card) ? 0 : 32; 5289 5290 if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED, 5291 QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) { 5292 rc = qdio_allocate(CARD_DDEV(card), init_data.no_input_qs, 5293 init_data.no_output_qs); 5294 if (rc) { 5295 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED); 5296 goto out; 5297 } 5298 rc = qdio_establish(CARD_DDEV(card), &init_data); 5299 if (rc) { 5300 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED); 5301 qdio_free(CARD_DDEV(card)); 5302 } 5303 } 5304 5305 switch (card->options.cq) { 5306 case QETH_CQ_ENABLED: 5307 dev_info(&card->gdev->dev, "Completion Queue support enabled"); 5308 break; 5309 case QETH_CQ_DISABLED: 5310 dev_info(&card->gdev->dev, "Completion Queue support disabled"); 5311 break; 5312 default: 5313 break; 5314 } 5315 5316 out: 5317 kfree(qib_parms); 5318 return rc; 5319 } 5320 5321 static void qeth_core_free_card(struct qeth_card *card) 5322 { 5323 QETH_CARD_TEXT(card, 2, "freecrd"); 5324 5325 unregister_service_level(&card->qeth_service_level); 5326 debugfs_remove_recursive(card->debugfs); 5327 qeth_put_cmd(card->read_cmd); 5328 destroy_workqueue(card->event_wq); 5329 dev_set_drvdata(&card->gdev->dev, NULL); 5330 kfree(card); 5331 } 5332 5333 static void qeth_trace_features(struct qeth_card *card) 5334 { 5335 QETH_CARD_TEXT(card, 2, "features"); 5336 QETH_CARD_HEX(card, 2, &card->options.ipa4, sizeof(card->options.ipa4)); 5337 QETH_CARD_HEX(card, 2, &card->options.ipa6, sizeof(card->options.ipa6)); 5338 QETH_CARD_HEX(card, 2, &card->options.adp, sizeof(card->options.adp)); 5339 QETH_CARD_HEX(card, 2, &card->info.diagass_support, 5340 sizeof(card->info.diagass_support)); 5341 } 5342 5343 static struct ccw_device_id qeth_ids[] = { 5344 {CCW_DEVICE_DEVTYPE(0x1731, 0x01, 0x1732, 0x01), 5345 .driver_info = QETH_CARD_TYPE_OSD}, 5346 {CCW_DEVICE_DEVTYPE(0x1731, 0x05, 0x1732, 0x05), 5347 .driver_info = QETH_CARD_TYPE_IQD}, 5348 #ifdef CONFIG_QETH_OSN 5349 {CCW_DEVICE_DEVTYPE(0x1731, 0x06, 0x1732, 0x06), 5350 .driver_info = QETH_CARD_TYPE_OSN}, 5351 #endif 5352 {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x03), 5353 .driver_info = QETH_CARD_TYPE_OSM}, 5354 #ifdef CONFIG_QETH_OSX 5355 {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02), 5356 .driver_info = QETH_CARD_TYPE_OSX}, 5357 #endif 5358 {}, 5359 }; 5360 MODULE_DEVICE_TABLE(ccw, qeth_ids); 5361 5362 static struct ccw_driver qeth_ccw_driver = { 5363 .driver = { 5364 .owner = THIS_MODULE, 5365 .name = "qeth", 5366 }, 5367 .ids = qeth_ids, 5368 .probe = ccwgroup_probe_ccwdev, 5369 .remove = ccwgroup_remove_ccwdev, 5370 }; 5371 5372 static int qeth_hardsetup_card(struct qeth_card *card, bool *carrier_ok) 5373 { 5374 int retries = 3; 5375 int rc; 5376 5377 QETH_CARD_TEXT(card, 2, "hrdsetup"); 5378 atomic_set(&card->force_alloc_skb, 0); 5379 rc = qeth_update_from_chp_desc(card); 5380 if (rc) 5381 return rc; 5382 retry: 5383 if (retries < 3) 5384 QETH_DBF_MESSAGE(2, "Retrying to do IDX activates on device %x.\n", 5385 CARD_DEVID(card)); 5386 rc = qeth_qdio_clear_card(card, !IS_IQD(card)); 5387 qeth_stop_channel(&card->data); 5388 qeth_stop_channel(&card->write); 5389 qeth_stop_channel(&card->read); 5390 qdio_free(CARD_DDEV(card)); 5391 5392 rc = qeth_start_channel(&card->read); 5393 if (rc) 5394 goto retriable; 5395 rc = qeth_start_channel(&card->write); 5396 if (rc) 5397 goto retriable; 5398 rc = qeth_start_channel(&card->data); 5399 if (rc) 5400 goto retriable; 5401 retriable: 5402 if (rc == -ERESTARTSYS) { 5403 QETH_CARD_TEXT(card, 2, "break1"); 5404 return rc; 5405 } else if (rc) { 5406 QETH_CARD_TEXT_(card, 2, "1err%d", rc); 5407 if (--retries < 0) 5408 goto out; 5409 else 5410 goto retry; 5411 } 5412 5413 qeth_determine_capabilities(card); 5414 qeth_read_ccw_conf_data(card); 5415 qeth_idx_init(card); 5416 5417 rc = qeth_idx_activate_read_channel(card); 5418 if (rc == -EINTR) { 5419 QETH_CARD_TEXT(card, 2, "break2"); 5420 return rc; 5421 } else if (rc) { 5422 QETH_CARD_TEXT_(card, 2, "3err%d", rc); 5423 if (--retries < 0) 5424 goto out; 5425 else 5426 goto retry; 5427 } 5428 5429 rc = qeth_idx_activate_write_channel(card); 5430 if (rc == -EINTR) { 5431 QETH_CARD_TEXT(card, 2, "break3"); 5432 return rc; 5433 } else if (rc) { 5434 QETH_CARD_TEXT_(card, 2, "4err%d", rc); 5435 if (--retries < 0) 5436 goto out; 5437 else 5438 goto retry; 5439 } 5440 card->read_or_write_problem = 0; 5441 rc = qeth_mpc_initialize(card); 5442 if (rc) { 5443 QETH_CARD_TEXT_(card, 2, "5err%d", rc); 5444 goto out; 5445 } 5446 5447 rc = qeth_send_startlan(card); 5448 if (rc) { 5449 QETH_CARD_TEXT_(card, 2, "6err%d", rc); 5450 if (rc == -ENETDOWN) { 5451 dev_warn(&card->gdev->dev, "The LAN is offline\n"); 5452 *carrier_ok = false; 5453 } else { 5454 goto out; 5455 } 5456 } else { 5457 *carrier_ok = true; 5458 } 5459 5460 card->options.ipa4.supported = 0; 5461 card->options.ipa6.supported = 0; 5462 card->options.adp.supported = 0; 5463 card->options.sbp.supported_funcs = 0; 5464 card->info.diagass_support = 0; 5465 rc = qeth_query_ipassists(card, QETH_PROT_IPV4); 5466 if (rc == -ENOMEM) 5467 goto out; 5468 if (qeth_is_supported(card, IPA_IPV6)) { 5469 rc = qeth_query_ipassists(card, QETH_PROT_IPV6); 5470 if (rc == -ENOMEM) 5471 goto out; 5472 } 5473 if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) { 5474 rc = qeth_query_setadapterparms(card); 5475 if (rc < 0) { 5476 QETH_CARD_TEXT_(card, 2, "7err%d", rc); 5477 goto out; 5478 } 5479 } 5480 if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) { 5481 rc = qeth_query_setdiagass(card); 5482 if (rc) 5483 QETH_CARD_TEXT_(card, 2, "8err%d", rc); 5484 } 5485 5486 qeth_trace_features(card); 5487 5488 if (!qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP) || 5489 (card->info.hwtrap && qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM))) 5490 card->info.hwtrap = 0; 5491 5492 if (card->options.isolation != ISOLATION_MODE_NONE) { 5493 rc = qeth_setadpparms_set_access_ctrl(card, 5494 card->options.isolation); 5495 if (rc) 5496 goto out; 5497 } 5498 5499 qeth_init_link_info(card); 5500 5501 rc = qeth_init_qdio_queues(card); 5502 if (rc) { 5503 QETH_CARD_TEXT_(card, 2, "9err%d", rc); 5504 goto out; 5505 } 5506 5507 return 0; 5508 out: 5509 dev_warn(&card->gdev->dev, "The qeth device driver failed to recover " 5510 "an error on the device\n"); 5511 QETH_DBF_MESSAGE(2, "Initialization for device %x failed in hardsetup! rc=%d\n", 5512 CARD_DEVID(card), rc); 5513 return rc; 5514 } 5515 5516 static int qeth_set_online(struct qeth_card *card, 5517 const struct qeth_discipline *disc) 5518 { 5519 bool carrier_ok; 5520 int rc; 5521 5522 mutex_lock(&card->conf_mutex); 5523 QETH_CARD_TEXT(card, 2, "setonlin"); 5524 5525 rc = qeth_hardsetup_card(card, &carrier_ok); 5526 if (rc) { 5527 QETH_CARD_TEXT_(card, 2, "2err%04x", rc); 5528 rc = -ENODEV; 5529 goto err_hardsetup; 5530 } 5531 5532 qeth_print_status_message(card); 5533 5534 if (card->dev->reg_state != NETREG_REGISTERED) 5535 /* no need for locking / error handling at this early stage: */ 5536 qeth_set_real_num_tx_queues(card, qeth_tx_actual_queues(card)); 5537 5538 rc = disc->set_online(card, carrier_ok); 5539 if (rc) 5540 goto err_online; 5541 5542 /* let user_space know that device is online */ 5543 kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE); 5544 5545 mutex_unlock(&card->conf_mutex); 5546 return 0; 5547 5548 err_online: 5549 err_hardsetup: 5550 qeth_qdio_clear_card(card, 0); 5551 qeth_clear_working_pool_list(card); 5552 qeth_flush_local_addrs(card); 5553 5554 qeth_stop_channel(&card->data); 5555 qeth_stop_channel(&card->write); 5556 qeth_stop_channel(&card->read); 5557 qdio_free(CARD_DDEV(card)); 5558 5559 mutex_unlock(&card->conf_mutex); 5560 return rc; 5561 } 5562 5563 int qeth_set_offline(struct qeth_card *card, const struct qeth_discipline *disc, 5564 bool resetting) 5565 { 5566 int rc, rc2, rc3; 5567 5568 mutex_lock(&card->conf_mutex); 5569 QETH_CARD_TEXT(card, 3, "setoffl"); 5570 5571 if ((!resetting && card->info.hwtrap) || card->info.hwtrap == 2) { 5572 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM); 5573 card->info.hwtrap = 1; 5574 } 5575 5576 /* cancel any stalled cmd that might block the rtnl: */ 5577 qeth_clear_ipacmd_list(card); 5578 5579 rtnl_lock(); 5580 card->info.open_when_online = card->dev->flags & IFF_UP; 5581 dev_close(card->dev); 5582 netif_device_detach(card->dev); 5583 netif_carrier_off(card->dev); 5584 rtnl_unlock(); 5585 5586 cancel_work_sync(&card->rx_mode_work); 5587 5588 disc->set_offline(card); 5589 5590 qeth_qdio_clear_card(card, 0); 5591 qeth_drain_output_queues(card); 5592 qeth_clear_working_pool_list(card); 5593 qeth_flush_local_addrs(card); 5594 card->info.promisc_mode = 0; 5595 5596 rc = qeth_stop_channel(&card->data); 5597 rc2 = qeth_stop_channel(&card->write); 5598 rc3 = qeth_stop_channel(&card->read); 5599 if (!rc) 5600 rc = (rc2) ? rc2 : rc3; 5601 if (rc) 5602 QETH_CARD_TEXT_(card, 2, "1err%d", rc); 5603 qdio_free(CARD_DDEV(card)); 5604 5605 /* let user_space know that device is offline */ 5606 kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE); 5607 5608 mutex_unlock(&card->conf_mutex); 5609 return 0; 5610 } 5611 EXPORT_SYMBOL_GPL(qeth_set_offline); 5612 5613 static int qeth_do_reset(void *data) 5614 { 5615 const struct qeth_discipline *disc; 5616 struct qeth_card *card = data; 5617 int rc; 5618 5619 /* Lock-free, other users will block until we are done. */ 5620 disc = card->discipline; 5621 5622 QETH_CARD_TEXT(card, 2, "recover1"); 5623 if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD)) 5624 return 0; 5625 QETH_CARD_TEXT(card, 2, "recover2"); 5626 dev_warn(&card->gdev->dev, 5627 "A recovery process has been started for the device\n"); 5628 5629 qeth_set_offline(card, disc, true); 5630 rc = qeth_set_online(card, disc); 5631 if (!rc) { 5632 dev_info(&card->gdev->dev, 5633 "Device successfully recovered!\n"); 5634 } else { 5635 ccwgroup_set_offline(card->gdev); 5636 dev_warn(&card->gdev->dev, 5637 "The qeth device driver failed to recover an error on the device\n"); 5638 } 5639 qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD); 5640 qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD); 5641 return 0; 5642 } 5643 5644 #if IS_ENABLED(CONFIG_QETH_L3) 5645 static void qeth_l3_rebuild_skb(struct qeth_card *card, struct sk_buff *skb, 5646 struct qeth_hdr *hdr) 5647 { 5648 struct af_iucv_trans_hdr *iucv = (struct af_iucv_trans_hdr *) skb->data; 5649 struct qeth_hdr_layer3 *l3_hdr = &hdr->hdr.l3; 5650 struct net_device *dev = skb->dev; 5651 5652 if (IS_IQD(card) && iucv->magic == ETH_P_AF_IUCV) { 5653 dev_hard_header(skb, dev, ETH_P_AF_IUCV, dev->dev_addr, 5654 "FAKELL", skb->len); 5655 return; 5656 } 5657 5658 if (!(l3_hdr->flags & QETH_HDR_PASSTHRU)) { 5659 u16 prot = (l3_hdr->flags & QETH_HDR_IPV6) ? ETH_P_IPV6 : 5660 ETH_P_IP; 5661 unsigned char tg_addr[ETH_ALEN]; 5662 5663 skb_reset_network_header(skb); 5664 switch (l3_hdr->flags & QETH_HDR_CAST_MASK) { 5665 case QETH_CAST_MULTICAST: 5666 if (prot == ETH_P_IP) 5667 ip_eth_mc_map(ip_hdr(skb)->daddr, tg_addr); 5668 else 5669 ipv6_eth_mc_map(&ipv6_hdr(skb)->daddr, tg_addr); 5670 QETH_CARD_STAT_INC(card, rx_multicast); 5671 break; 5672 case QETH_CAST_BROADCAST: 5673 ether_addr_copy(tg_addr, dev->broadcast); 5674 QETH_CARD_STAT_INC(card, rx_multicast); 5675 break; 5676 default: 5677 if (card->options.sniffer) 5678 skb->pkt_type = PACKET_OTHERHOST; 5679 ether_addr_copy(tg_addr, dev->dev_addr); 5680 } 5681 5682 if (l3_hdr->ext_flags & QETH_HDR_EXT_SRC_MAC_ADDR) 5683 dev_hard_header(skb, dev, prot, tg_addr, 5684 &l3_hdr->next_hop.rx.src_mac, skb->len); 5685 else 5686 dev_hard_header(skb, dev, prot, tg_addr, "FAKELL", 5687 skb->len); 5688 } 5689 5690 /* copy VLAN tag from hdr into skb */ 5691 if (!card->options.sniffer && 5692 (l3_hdr->ext_flags & (QETH_HDR_EXT_VLAN_FRAME | 5693 QETH_HDR_EXT_INCLUDE_VLAN_TAG))) { 5694 u16 tag = (l3_hdr->ext_flags & QETH_HDR_EXT_VLAN_FRAME) ? 5695 l3_hdr->vlan_id : 5696 l3_hdr->next_hop.rx.vlan_id; 5697 5698 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag); 5699 } 5700 } 5701 #endif 5702 5703 static void qeth_receive_skb(struct qeth_card *card, struct sk_buff *skb, 5704 struct qeth_hdr *hdr, bool uses_frags) 5705 { 5706 struct napi_struct *napi = &card->napi; 5707 bool is_cso; 5708 5709 switch (hdr->hdr.l2.id) { 5710 case QETH_HEADER_TYPE_OSN: 5711 skb_push(skb, sizeof(*hdr)); 5712 skb_copy_to_linear_data(skb, hdr, sizeof(*hdr)); 5713 QETH_CARD_STAT_ADD(card, rx_bytes, skb->len); 5714 QETH_CARD_STAT_INC(card, rx_packets); 5715 5716 card->osn_info.data_cb(skb); 5717 return; 5718 #if IS_ENABLED(CONFIG_QETH_L3) 5719 case QETH_HEADER_TYPE_LAYER3: 5720 qeth_l3_rebuild_skb(card, skb, hdr); 5721 is_cso = hdr->hdr.l3.ext_flags & QETH_HDR_EXT_CSUM_TRANSP_REQ; 5722 break; 5723 #endif 5724 case QETH_HEADER_TYPE_LAYER2: 5725 is_cso = hdr->hdr.l2.flags[1] & QETH_HDR_EXT_CSUM_TRANSP_REQ; 5726 break; 5727 default: 5728 /* never happens */ 5729 if (uses_frags) 5730 napi_free_frags(napi); 5731 else 5732 dev_kfree_skb_any(skb); 5733 return; 5734 } 5735 5736 if (is_cso && (card->dev->features & NETIF_F_RXCSUM)) { 5737 skb->ip_summed = CHECKSUM_UNNECESSARY; 5738 QETH_CARD_STAT_INC(card, rx_skb_csum); 5739 } else { 5740 skb->ip_summed = CHECKSUM_NONE; 5741 } 5742 5743 QETH_CARD_STAT_ADD(card, rx_bytes, skb->len); 5744 QETH_CARD_STAT_INC(card, rx_packets); 5745 if (skb_is_nonlinear(skb)) { 5746 QETH_CARD_STAT_INC(card, rx_sg_skbs); 5747 QETH_CARD_STAT_ADD(card, rx_sg_frags, 5748 skb_shinfo(skb)->nr_frags); 5749 } 5750 5751 if (uses_frags) { 5752 napi_gro_frags(napi); 5753 } else { 5754 skb->protocol = eth_type_trans(skb, skb->dev); 5755 napi_gro_receive(napi, skb); 5756 } 5757 } 5758 5759 static void qeth_create_skb_frag(struct sk_buff *skb, char *data, int data_len) 5760 { 5761 struct page *page = virt_to_page(data); 5762 unsigned int next_frag; 5763 5764 next_frag = skb_shinfo(skb)->nr_frags; 5765 get_page(page); 5766 skb_add_rx_frag(skb, next_frag, page, offset_in_page(data), data_len, 5767 data_len); 5768 } 5769 5770 static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale) 5771 { 5772 return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY); 5773 } 5774 5775 static int qeth_extract_skb(struct qeth_card *card, 5776 struct qeth_qdio_buffer *qethbuffer, u8 *element_no, 5777 int *__offset) 5778 { 5779 struct qeth_priv *priv = netdev_priv(card->dev); 5780 struct qdio_buffer *buffer = qethbuffer->buffer; 5781 struct napi_struct *napi = &card->napi; 5782 struct qdio_buffer_element *element; 5783 unsigned int linear_len = 0; 5784 bool uses_frags = false; 5785 int offset = *__offset; 5786 bool use_rx_sg = false; 5787 unsigned int headroom; 5788 struct qeth_hdr *hdr; 5789 struct sk_buff *skb; 5790 int skb_len = 0; 5791 5792 element = &buffer->element[*element_no]; 5793 5794 next_packet: 5795 /* qeth_hdr must not cross element boundaries */ 5796 while (element->length < offset + sizeof(struct qeth_hdr)) { 5797 if (qeth_is_last_sbale(element)) 5798 return -ENODATA; 5799 element++; 5800 offset = 0; 5801 } 5802 5803 hdr = phys_to_virt(element->addr) + offset; 5804 offset += sizeof(*hdr); 5805 skb = NULL; 5806 5807 switch (hdr->hdr.l2.id) { 5808 case QETH_HEADER_TYPE_LAYER2: 5809 skb_len = hdr->hdr.l2.pkt_length; 5810 linear_len = ETH_HLEN; 5811 headroom = 0; 5812 break; 5813 case QETH_HEADER_TYPE_LAYER3: 5814 skb_len = hdr->hdr.l3.length; 5815 if (!IS_LAYER3(card)) { 5816 QETH_CARD_STAT_INC(card, rx_dropped_notsupp); 5817 goto walk_packet; 5818 } 5819 5820 if (hdr->hdr.l3.flags & QETH_HDR_PASSTHRU) { 5821 linear_len = ETH_HLEN; 5822 headroom = 0; 5823 break; 5824 } 5825 5826 if (hdr->hdr.l3.flags & QETH_HDR_IPV6) 5827 linear_len = sizeof(struct ipv6hdr); 5828 else 5829 linear_len = sizeof(struct iphdr); 5830 headroom = ETH_HLEN; 5831 break; 5832 case QETH_HEADER_TYPE_OSN: 5833 skb_len = hdr->hdr.osn.pdu_length; 5834 if (!IS_OSN(card)) { 5835 QETH_CARD_STAT_INC(card, rx_dropped_notsupp); 5836 goto walk_packet; 5837 } 5838 5839 linear_len = skb_len; 5840 headroom = sizeof(struct qeth_hdr); 5841 break; 5842 default: 5843 if (hdr->hdr.l2.id & QETH_HEADER_MASK_INVAL) 5844 QETH_CARD_STAT_INC(card, rx_frame_errors); 5845 else 5846 QETH_CARD_STAT_INC(card, rx_dropped_notsupp); 5847 5848 /* Can't determine packet length, drop the whole buffer. */ 5849 return -EPROTONOSUPPORT; 5850 } 5851 5852 if (skb_len < linear_len) { 5853 QETH_CARD_STAT_INC(card, rx_dropped_runt); 5854 goto walk_packet; 5855 } 5856 5857 use_rx_sg = (card->options.cq == QETH_CQ_ENABLED) || 5858 (skb_len > READ_ONCE(priv->rx_copybreak) && 5859 !atomic_read(&card->force_alloc_skb) && 5860 !IS_OSN(card)); 5861 5862 if (use_rx_sg) { 5863 /* QETH_CQ_ENABLED only: */ 5864 if (qethbuffer->rx_skb && 5865 skb_tailroom(qethbuffer->rx_skb) >= linear_len + headroom) { 5866 skb = qethbuffer->rx_skb; 5867 qethbuffer->rx_skb = NULL; 5868 goto use_skb; 5869 } 5870 5871 skb = napi_get_frags(napi); 5872 if (!skb) { 5873 /* -ENOMEM, no point in falling back further. */ 5874 QETH_CARD_STAT_INC(card, rx_dropped_nomem); 5875 goto walk_packet; 5876 } 5877 5878 if (skb_tailroom(skb) >= linear_len + headroom) { 5879 uses_frags = true; 5880 goto use_skb; 5881 } 5882 5883 netdev_info_once(card->dev, 5884 "Insufficient linear space in NAPI frags skb, need %u but have %u\n", 5885 linear_len + headroom, skb_tailroom(skb)); 5886 /* Shouldn't happen. Don't optimize, fall back to linear skb. */ 5887 } 5888 5889 linear_len = skb_len; 5890 skb = napi_alloc_skb(napi, linear_len + headroom); 5891 if (!skb) { 5892 QETH_CARD_STAT_INC(card, rx_dropped_nomem); 5893 goto walk_packet; 5894 } 5895 5896 use_skb: 5897 if (headroom) 5898 skb_reserve(skb, headroom); 5899 walk_packet: 5900 while (skb_len) { 5901 int data_len = min(skb_len, (int)(element->length - offset)); 5902 char *data = phys_to_virt(element->addr) + offset; 5903 5904 skb_len -= data_len; 5905 offset += data_len; 5906 5907 /* Extract data from current element: */ 5908 if (skb && data_len) { 5909 if (linear_len) { 5910 unsigned int copy_len; 5911 5912 copy_len = min_t(unsigned int, linear_len, 5913 data_len); 5914 5915 skb_put_data(skb, data, copy_len); 5916 linear_len -= copy_len; 5917 data_len -= copy_len; 5918 data += copy_len; 5919 } 5920 5921 if (data_len) 5922 qeth_create_skb_frag(skb, data, data_len); 5923 } 5924 5925 /* Step forward to next element: */ 5926 if (skb_len) { 5927 if (qeth_is_last_sbale(element)) { 5928 QETH_CARD_TEXT(card, 4, "unexeob"); 5929 QETH_CARD_HEX(card, 2, buffer, sizeof(void *)); 5930 if (skb) { 5931 if (uses_frags) 5932 napi_free_frags(napi); 5933 else 5934 dev_kfree_skb_any(skb); 5935 QETH_CARD_STAT_INC(card, 5936 rx_length_errors); 5937 } 5938 return -EMSGSIZE; 5939 } 5940 element++; 5941 offset = 0; 5942 } 5943 } 5944 5945 /* This packet was skipped, go get another one: */ 5946 if (!skb) 5947 goto next_packet; 5948 5949 *element_no = element - &buffer->element[0]; 5950 *__offset = offset; 5951 5952 qeth_receive_skb(card, skb, hdr, uses_frags); 5953 return 0; 5954 } 5955 5956 static unsigned int qeth_extract_skbs(struct qeth_card *card, int budget, 5957 struct qeth_qdio_buffer *buf, bool *done) 5958 { 5959 unsigned int work_done = 0; 5960 5961 while (budget) { 5962 if (qeth_extract_skb(card, buf, &card->rx.buf_element, 5963 &card->rx.e_offset)) { 5964 *done = true; 5965 break; 5966 } 5967 5968 work_done++; 5969 budget--; 5970 } 5971 5972 return work_done; 5973 } 5974 5975 static unsigned int qeth_rx_poll(struct qeth_card *card, int budget) 5976 { 5977 struct qeth_rx *ctx = &card->rx; 5978 unsigned int work_done = 0; 5979 5980 while (budget > 0) { 5981 struct qeth_qdio_buffer *buffer; 5982 unsigned int skbs_done = 0; 5983 bool done = false; 5984 5985 /* Fetch completed RX buffers: */ 5986 if (!card->rx.b_count) { 5987 card->rx.qdio_err = 0; 5988 card->rx.b_count = qdio_get_next_buffers( 5989 card->data.ccwdev, 0, &card->rx.b_index, 5990 &card->rx.qdio_err); 5991 if (card->rx.b_count <= 0) { 5992 card->rx.b_count = 0; 5993 break; 5994 } 5995 } 5996 5997 /* Process one completed RX buffer: */ 5998 buffer = &card->qdio.in_q->bufs[card->rx.b_index]; 5999 if (!(card->rx.qdio_err && 6000 qeth_check_qdio_errors(card, buffer->buffer, 6001 card->rx.qdio_err, "qinerr"))) 6002 skbs_done = qeth_extract_skbs(card, budget, buffer, 6003 &done); 6004 else 6005 done = true; 6006 6007 work_done += skbs_done; 6008 budget -= skbs_done; 6009 6010 if (done) { 6011 QETH_CARD_STAT_INC(card, rx_bufs); 6012 qeth_put_buffer_pool_entry(card, buffer->pool_entry); 6013 buffer->pool_entry = NULL; 6014 card->rx.b_count--; 6015 ctx->bufs_refill++; 6016 ctx->bufs_refill -= qeth_rx_refill_queue(card, 6017 ctx->bufs_refill); 6018 6019 /* Step forward to next buffer: */ 6020 card->rx.b_index = QDIO_BUFNR(card->rx.b_index + 1); 6021 card->rx.buf_element = 0; 6022 card->rx.e_offset = 0; 6023 } 6024 } 6025 6026 return work_done; 6027 } 6028 6029 static void qeth_cq_poll(struct qeth_card *card) 6030 { 6031 unsigned int work_done = 0; 6032 6033 while (work_done < QDIO_MAX_BUFFERS_PER_Q) { 6034 unsigned int start, error; 6035 int completed; 6036 6037 completed = qdio_inspect_queue(CARD_DDEV(card), 1, true, &start, 6038 &error); 6039 if (completed <= 0) 6040 return; 6041 6042 qeth_qdio_cq_handler(card, error, 1, start, completed); 6043 work_done += completed; 6044 } 6045 } 6046 6047 int qeth_poll(struct napi_struct *napi, int budget) 6048 { 6049 struct qeth_card *card = container_of(napi, struct qeth_card, napi); 6050 unsigned int work_done; 6051 6052 work_done = qeth_rx_poll(card, budget); 6053 6054 if (card->options.cq == QETH_CQ_ENABLED) 6055 qeth_cq_poll(card); 6056 6057 if (budget) { 6058 struct qeth_rx *ctx = &card->rx; 6059 6060 /* Process any substantial refill backlog: */ 6061 ctx->bufs_refill -= qeth_rx_refill_queue(card, ctx->bufs_refill); 6062 6063 /* Exhausted the RX budget. Keep IRQ disabled, we get called again. */ 6064 if (work_done >= budget) 6065 return work_done; 6066 } 6067 6068 if (napi_complete_done(napi, work_done) && 6069 qdio_start_irq(CARD_DDEV(card))) 6070 napi_schedule(napi); 6071 6072 return work_done; 6073 } 6074 EXPORT_SYMBOL_GPL(qeth_poll); 6075 6076 static void qeth_iqd_tx_complete(struct qeth_qdio_out_q *queue, 6077 unsigned int bidx, bool error, int budget) 6078 { 6079 struct qeth_qdio_out_buffer *buffer = queue->bufs[bidx]; 6080 u8 sflags = buffer->buffer->element[15].sflags; 6081 struct qeth_card *card = queue->card; 6082 6083 if (queue->bufstates && (queue->bufstates[bidx].flags & 6084 QDIO_OUTBUF_STATE_FLAG_PENDING)) { 6085 WARN_ON_ONCE(card->options.cq != QETH_CQ_ENABLED); 6086 6087 QETH_CARD_TEXT_(card, 5, "pel%u", bidx); 6088 6089 switch (atomic_cmpxchg(&buffer->state, 6090 QETH_QDIO_BUF_PRIMED, 6091 QETH_QDIO_BUF_PENDING)) { 6092 case QETH_QDIO_BUF_PRIMED: 6093 /* We have initial ownership, no QAOB (yet): */ 6094 qeth_notify_skbs(queue, buffer, TX_NOTIFY_PENDING); 6095 6096 /* Handle race with qeth_qdio_handle_aob(): */ 6097 switch (atomic_xchg(&buffer->state, 6098 QETH_QDIO_BUF_NEED_QAOB)) { 6099 case QETH_QDIO_BUF_PENDING: 6100 /* No concurrent QAOB notification. */ 6101 6102 /* Prepare the queue slot for immediate re-use: */ 6103 qeth_scrub_qdio_buffer(buffer->buffer, queue->max_elements); 6104 if (qeth_init_qdio_out_buf(queue, bidx)) { 6105 QETH_CARD_TEXT(card, 2, "outofbuf"); 6106 qeth_schedule_recovery(card); 6107 } 6108 6109 /* Skip clearing the buffer: */ 6110 return; 6111 case QETH_QDIO_BUF_QAOB_OK: 6112 qeth_notify_skbs(queue, buffer, 6113 TX_NOTIFY_DELAYED_OK); 6114 error = false; 6115 break; 6116 case QETH_QDIO_BUF_QAOB_ERROR: 6117 qeth_notify_skbs(queue, buffer, 6118 TX_NOTIFY_DELAYED_GENERALERROR); 6119 error = true; 6120 break; 6121 default: 6122 WARN_ON_ONCE(1); 6123 } 6124 6125 break; 6126 case QETH_QDIO_BUF_QAOB_OK: 6127 /* qeth_qdio_handle_aob() already received a QAOB: */ 6128 qeth_notify_skbs(queue, buffer, TX_NOTIFY_OK); 6129 error = false; 6130 break; 6131 case QETH_QDIO_BUF_QAOB_ERROR: 6132 /* qeth_qdio_handle_aob() already received a QAOB: */ 6133 qeth_notify_skbs(queue, buffer, TX_NOTIFY_GENERALERROR); 6134 error = true; 6135 break; 6136 default: 6137 WARN_ON_ONCE(1); 6138 } 6139 } else if (card->options.cq == QETH_CQ_ENABLED) { 6140 qeth_notify_skbs(queue, buffer, 6141 qeth_compute_cq_notification(sflags, 0)); 6142 } 6143 6144 qeth_clear_output_buffer(queue, buffer, error, budget); 6145 } 6146 6147 static int qeth_tx_poll(struct napi_struct *napi, int budget) 6148 { 6149 struct qeth_qdio_out_q *queue = qeth_napi_to_out_queue(napi); 6150 unsigned int queue_no = queue->queue_no; 6151 struct qeth_card *card = queue->card; 6152 struct net_device *dev = card->dev; 6153 unsigned int work_done = 0; 6154 struct netdev_queue *txq; 6155 6156 txq = netdev_get_tx_queue(dev, qeth_iqd_translate_txq(dev, queue_no)); 6157 6158 while (1) { 6159 unsigned int start, error, i; 6160 unsigned int packets = 0; 6161 unsigned int bytes = 0; 6162 int completed; 6163 6164 if (qeth_out_queue_is_empty(queue)) { 6165 napi_complete(napi); 6166 return 0; 6167 } 6168 6169 /* Give the CPU a breather: */ 6170 if (work_done >= QDIO_MAX_BUFFERS_PER_Q) { 6171 QETH_TXQ_STAT_INC(queue, completion_yield); 6172 if (napi_complete_done(napi, 0)) 6173 napi_schedule(napi); 6174 return 0; 6175 } 6176 6177 completed = qdio_inspect_queue(CARD_DDEV(card), queue_no, false, 6178 &start, &error); 6179 if (completed <= 0) { 6180 /* Ensure we see TX completion for pending work: */ 6181 if (napi_complete_done(napi, 0)) 6182 qeth_tx_arm_timer(queue, QETH_TX_TIMER_USECS); 6183 return 0; 6184 } 6185 6186 for (i = start; i < start + completed; i++) { 6187 struct qeth_qdio_out_buffer *buffer; 6188 unsigned int bidx = QDIO_BUFNR(i); 6189 6190 buffer = queue->bufs[bidx]; 6191 packets += buffer->frames; 6192 bytes += buffer->bytes; 6193 6194 qeth_handle_send_error(card, buffer, error); 6195 qeth_iqd_tx_complete(queue, bidx, error, budget); 6196 qeth_cleanup_handled_pending(queue, bidx, false); 6197 } 6198 6199 netdev_tx_completed_queue(txq, packets, bytes); 6200 atomic_sub(completed, &queue->used_buffers); 6201 work_done += completed; 6202 6203 /* xmit may have observed the full-condition, but not yet 6204 * stopped the txq. In which case the code below won't trigger. 6205 * So before returning, xmit will re-check the txq's fill level 6206 * and wake it up if needed. 6207 */ 6208 if (netif_tx_queue_stopped(txq) && 6209 !qeth_out_queue_is_full(queue)) 6210 netif_tx_wake_queue(txq); 6211 } 6212 } 6213 6214 static int qeth_setassparms_inspect_rc(struct qeth_ipa_cmd *cmd) 6215 { 6216 if (!cmd->hdr.return_code) 6217 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code; 6218 return cmd->hdr.return_code; 6219 } 6220 6221 static int qeth_setassparms_get_caps_cb(struct qeth_card *card, 6222 struct qeth_reply *reply, 6223 unsigned long data) 6224 { 6225 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; 6226 struct qeth_ipa_caps *caps = reply->param; 6227 6228 if (qeth_setassparms_inspect_rc(cmd)) 6229 return -EIO; 6230 6231 caps->supported = cmd->data.setassparms.data.caps.supported; 6232 caps->enabled = cmd->data.setassparms.data.caps.enabled; 6233 return 0; 6234 } 6235 6236 int qeth_setassparms_cb(struct qeth_card *card, 6237 struct qeth_reply *reply, unsigned long data) 6238 { 6239 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; 6240 6241 QETH_CARD_TEXT(card, 4, "defadpcb"); 6242 6243 if (cmd->hdr.return_code) 6244 return -EIO; 6245 6246 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code; 6247 if (cmd->hdr.prot_version == QETH_PROT_IPV4) 6248 card->options.ipa4.enabled = cmd->hdr.assists.enabled; 6249 if (cmd->hdr.prot_version == QETH_PROT_IPV6) 6250 card->options.ipa6.enabled = cmd->hdr.assists.enabled; 6251 return 0; 6252 } 6253 EXPORT_SYMBOL_GPL(qeth_setassparms_cb); 6254 6255 struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card, 6256 enum qeth_ipa_funcs ipa_func, 6257 u16 cmd_code, 6258 unsigned int data_length, 6259 enum qeth_prot_versions prot) 6260 { 6261 struct qeth_ipacmd_setassparms *setassparms; 6262 struct qeth_ipacmd_setassparms_hdr *hdr; 6263 struct qeth_cmd_buffer *iob; 6264 6265 QETH_CARD_TEXT(card, 4, "getasscm"); 6266 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETASSPARMS, prot, 6267 data_length + 6268 offsetof(struct qeth_ipacmd_setassparms, 6269 data)); 6270 if (!iob) 6271 return NULL; 6272 6273 setassparms = &__ipa_cmd(iob)->data.setassparms; 6274 setassparms->assist_no = ipa_func; 6275 6276 hdr = &setassparms->hdr; 6277 hdr->length = sizeof(*hdr) + data_length; 6278 hdr->command_code = cmd_code; 6279 return iob; 6280 } 6281 EXPORT_SYMBOL_GPL(qeth_get_setassparms_cmd); 6282 6283 int qeth_send_simple_setassparms_prot(struct qeth_card *card, 6284 enum qeth_ipa_funcs ipa_func, 6285 u16 cmd_code, u32 *data, 6286 enum qeth_prot_versions prot) 6287 { 6288 unsigned int length = data ? SETASS_DATA_SIZEOF(flags_32bit) : 0; 6289 struct qeth_cmd_buffer *iob; 6290 6291 QETH_CARD_TEXT_(card, 4, "simassp%i", prot); 6292 iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code, length, prot); 6293 if (!iob) 6294 return -ENOMEM; 6295 6296 if (data) 6297 __ipa_cmd(iob)->data.setassparms.data.flags_32bit = *data; 6298 return qeth_send_ipa_cmd(card, iob, qeth_setassparms_cb, NULL); 6299 } 6300 EXPORT_SYMBOL_GPL(qeth_send_simple_setassparms_prot); 6301 6302 static void qeth_unregister_dbf_views(void) 6303 { 6304 int x; 6305 6306 for (x = 0; x < QETH_DBF_INFOS; x++) { 6307 debug_unregister(qeth_dbf[x].id); 6308 qeth_dbf[x].id = NULL; 6309 } 6310 } 6311 6312 void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...) 6313 { 6314 char dbf_txt_buf[32]; 6315 va_list args; 6316 6317 if (!debug_level_enabled(id, level)) 6318 return; 6319 va_start(args, fmt); 6320 vsnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args); 6321 va_end(args); 6322 debug_text_event(id, level, dbf_txt_buf); 6323 } 6324 EXPORT_SYMBOL_GPL(qeth_dbf_longtext); 6325 6326 static int qeth_register_dbf_views(void) 6327 { 6328 int ret; 6329 int x; 6330 6331 for (x = 0; x < QETH_DBF_INFOS; x++) { 6332 /* register the areas */ 6333 qeth_dbf[x].id = debug_register(qeth_dbf[x].name, 6334 qeth_dbf[x].pages, 6335 qeth_dbf[x].areas, 6336 qeth_dbf[x].len); 6337 if (qeth_dbf[x].id == NULL) { 6338 qeth_unregister_dbf_views(); 6339 return -ENOMEM; 6340 } 6341 6342 /* register a view */ 6343 ret = debug_register_view(qeth_dbf[x].id, qeth_dbf[x].view); 6344 if (ret) { 6345 qeth_unregister_dbf_views(); 6346 return ret; 6347 } 6348 6349 /* set a passing level */ 6350 debug_set_level(qeth_dbf[x].id, qeth_dbf[x].level); 6351 } 6352 6353 return 0; 6354 } 6355 6356 static DEFINE_MUTEX(qeth_mod_mutex); /* for synchronized module loading */ 6357 6358 int qeth_setup_discipline(struct qeth_card *card, 6359 enum qeth_discipline_id discipline) 6360 { 6361 int rc; 6362 6363 mutex_lock(&qeth_mod_mutex); 6364 switch (discipline) { 6365 case QETH_DISCIPLINE_LAYER3: 6366 card->discipline = try_then_request_module( 6367 symbol_get(qeth_l3_discipline), "qeth_l3"); 6368 break; 6369 case QETH_DISCIPLINE_LAYER2: 6370 card->discipline = try_then_request_module( 6371 symbol_get(qeth_l2_discipline), "qeth_l2"); 6372 break; 6373 default: 6374 break; 6375 } 6376 mutex_unlock(&qeth_mod_mutex); 6377 6378 if (!card->discipline) { 6379 dev_err(&card->gdev->dev, "There is no kernel module to " 6380 "support discipline %d\n", discipline); 6381 return -EINVAL; 6382 } 6383 6384 rc = card->discipline->setup(card->gdev); 6385 if (rc) { 6386 if (discipline == QETH_DISCIPLINE_LAYER2) 6387 symbol_put(qeth_l2_discipline); 6388 else 6389 symbol_put(qeth_l3_discipline); 6390 card->discipline = NULL; 6391 6392 return rc; 6393 } 6394 6395 card->options.layer = discipline; 6396 return 0; 6397 } 6398 6399 void qeth_remove_discipline(struct qeth_card *card) 6400 { 6401 card->discipline->remove(card->gdev); 6402 6403 if (IS_LAYER2(card)) 6404 symbol_put(qeth_l2_discipline); 6405 else 6406 symbol_put(qeth_l3_discipline); 6407 card->options.layer = QETH_DISCIPLINE_UNDETERMINED; 6408 card->discipline = NULL; 6409 } 6410 6411 const struct device_type qeth_generic_devtype = { 6412 .name = "qeth_generic", 6413 }; 6414 EXPORT_SYMBOL_GPL(qeth_generic_devtype); 6415 6416 static const struct device_type qeth_osn_devtype = { 6417 .name = "qeth_osn", 6418 }; 6419 6420 #define DBF_NAME_LEN 20 6421 6422 struct qeth_dbf_entry { 6423 char dbf_name[DBF_NAME_LEN]; 6424 debug_info_t *dbf_info; 6425 struct list_head dbf_list; 6426 }; 6427 6428 static LIST_HEAD(qeth_dbf_list); 6429 static DEFINE_MUTEX(qeth_dbf_list_mutex); 6430 6431 static debug_info_t *qeth_get_dbf_entry(char *name) 6432 { 6433 struct qeth_dbf_entry *entry; 6434 debug_info_t *rc = NULL; 6435 6436 mutex_lock(&qeth_dbf_list_mutex); 6437 list_for_each_entry(entry, &qeth_dbf_list, dbf_list) { 6438 if (strcmp(entry->dbf_name, name) == 0) { 6439 rc = entry->dbf_info; 6440 break; 6441 } 6442 } 6443 mutex_unlock(&qeth_dbf_list_mutex); 6444 return rc; 6445 } 6446 6447 static int qeth_add_dbf_entry(struct qeth_card *card, char *name) 6448 { 6449 struct qeth_dbf_entry *new_entry; 6450 6451 card->debug = debug_register(name, 2, 1, 8); 6452 if (!card->debug) { 6453 QETH_DBF_TEXT_(SETUP, 2, "%s", "qcdbf"); 6454 goto err; 6455 } 6456 if (debug_register_view(card->debug, &debug_hex_ascii_view)) 6457 goto err_dbg; 6458 new_entry = kzalloc(sizeof(struct qeth_dbf_entry), GFP_KERNEL); 6459 if (!new_entry) 6460 goto err_dbg; 6461 strncpy(new_entry->dbf_name, name, DBF_NAME_LEN); 6462 new_entry->dbf_info = card->debug; 6463 mutex_lock(&qeth_dbf_list_mutex); 6464 list_add(&new_entry->dbf_list, &qeth_dbf_list); 6465 mutex_unlock(&qeth_dbf_list_mutex); 6466 6467 return 0; 6468 6469 err_dbg: 6470 debug_unregister(card->debug); 6471 err: 6472 return -ENOMEM; 6473 } 6474 6475 static void qeth_clear_dbf_list(void) 6476 { 6477 struct qeth_dbf_entry *entry, *tmp; 6478 6479 mutex_lock(&qeth_dbf_list_mutex); 6480 list_for_each_entry_safe(entry, tmp, &qeth_dbf_list, dbf_list) { 6481 list_del(&entry->dbf_list); 6482 debug_unregister(entry->dbf_info); 6483 kfree(entry); 6484 } 6485 mutex_unlock(&qeth_dbf_list_mutex); 6486 } 6487 6488 static struct net_device *qeth_alloc_netdev(struct qeth_card *card) 6489 { 6490 struct net_device *dev; 6491 struct qeth_priv *priv; 6492 6493 switch (card->info.type) { 6494 case QETH_CARD_TYPE_IQD: 6495 dev = alloc_netdev_mqs(sizeof(*priv), "hsi%d", NET_NAME_UNKNOWN, 6496 ether_setup, QETH_MAX_OUT_QUEUES, 1); 6497 break; 6498 case QETH_CARD_TYPE_OSM: 6499 dev = alloc_etherdev(sizeof(*priv)); 6500 break; 6501 case QETH_CARD_TYPE_OSN: 6502 dev = alloc_netdev(sizeof(*priv), "osn%d", NET_NAME_UNKNOWN, 6503 ether_setup); 6504 break; 6505 default: 6506 dev = alloc_etherdev_mqs(sizeof(*priv), QETH_MAX_OUT_QUEUES, 1); 6507 } 6508 6509 if (!dev) 6510 return NULL; 6511 6512 priv = netdev_priv(dev); 6513 priv->rx_copybreak = QETH_RX_COPYBREAK; 6514 priv->tx_wanted_queues = IS_IQD(card) ? QETH_IQD_MIN_TXQ : 1; 6515 6516 dev->ml_priv = card; 6517 dev->watchdog_timeo = QETH_TX_TIMEOUT; 6518 dev->min_mtu = IS_OSN(card) ? 64 : 576; 6519 /* initialized when device first goes online: */ 6520 dev->max_mtu = 0; 6521 dev->mtu = 0; 6522 SET_NETDEV_DEV(dev, &card->gdev->dev); 6523 netif_carrier_off(dev); 6524 6525 if (IS_OSN(card)) { 6526 dev->ethtool_ops = &qeth_osn_ethtool_ops; 6527 } else { 6528 dev->ethtool_ops = &qeth_ethtool_ops; 6529 dev->priv_flags &= ~IFF_TX_SKB_SHARING; 6530 dev->hw_features |= NETIF_F_SG; 6531 dev->vlan_features |= NETIF_F_SG; 6532 if (IS_IQD(card)) 6533 dev->features |= NETIF_F_SG; 6534 } 6535 6536 return dev; 6537 } 6538 6539 struct net_device *qeth_clone_netdev(struct net_device *orig) 6540 { 6541 struct net_device *clone = qeth_alloc_netdev(orig->ml_priv); 6542 6543 if (!clone) 6544 return NULL; 6545 6546 clone->dev_port = orig->dev_port; 6547 return clone; 6548 } 6549 6550 static int qeth_core_probe_device(struct ccwgroup_device *gdev) 6551 { 6552 struct qeth_card *card; 6553 struct device *dev; 6554 int rc; 6555 enum qeth_discipline_id enforced_disc; 6556 char dbf_name[DBF_NAME_LEN]; 6557 6558 QETH_DBF_TEXT(SETUP, 2, "probedev"); 6559 6560 dev = &gdev->dev; 6561 if (!get_device(dev)) 6562 return -ENODEV; 6563 6564 QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev)); 6565 6566 card = qeth_alloc_card(gdev); 6567 if (!card) { 6568 QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM); 6569 rc = -ENOMEM; 6570 goto err_dev; 6571 } 6572 6573 snprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s", 6574 dev_name(&gdev->dev)); 6575 card->debug = qeth_get_dbf_entry(dbf_name); 6576 if (!card->debug) { 6577 rc = qeth_add_dbf_entry(card, dbf_name); 6578 if (rc) 6579 goto err_card; 6580 } 6581 6582 qeth_setup_card(card); 6583 card->dev = qeth_alloc_netdev(card); 6584 if (!card->dev) { 6585 rc = -ENOMEM; 6586 goto err_card; 6587 } 6588 6589 qeth_determine_capabilities(card); 6590 qeth_set_blkt_defaults(card); 6591 6592 card->qdio.no_out_queues = card->dev->num_tx_queues; 6593 rc = qeth_update_from_chp_desc(card); 6594 if (rc) 6595 goto err_chp_desc; 6596 6597 if (IS_OSN(card)) 6598 gdev->dev.groups = qeth_osn_dev_groups; 6599 else 6600 gdev->dev.groups = qeth_dev_groups; 6601 6602 enforced_disc = qeth_enforce_discipline(card); 6603 switch (enforced_disc) { 6604 case QETH_DISCIPLINE_UNDETERMINED: 6605 gdev->dev.type = &qeth_generic_devtype; 6606 break; 6607 default: 6608 card->info.layer_enforced = true; 6609 /* It's so early that we don't need the discipline_mutex yet. */ 6610 rc = qeth_setup_discipline(card, enforced_disc); 6611 if (rc) 6612 goto err_setup_disc; 6613 6614 gdev->dev.type = IS_OSN(card) ? &qeth_osn_devtype : 6615 card->discipline->devtype; 6616 break; 6617 } 6618 6619 return 0; 6620 6621 err_setup_disc: 6622 err_chp_desc: 6623 free_netdev(card->dev); 6624 err_card: 6625 qeth_core_free_card(card); 6626 err_dev: 6627 put_device(dev); 6628 return rc; 6629 } 6630 6631 static void qeth_core_remove_device(struct ccwgroup_device *gdev) 6632 { 6633 struct qeth_card *card = dev_get_drvdata(&gdev->dev); 6634 6635 QETH_CARD_TEXT(card, 2, "removedv"); 6636 6637 mutex_lock(&card->discipline_mutex); 6638 if (card->discipline) 6639 qeth_remove_discipline(card); 6640 mutex_unlock(&card->discipline_mutex); 6641 6642 qeth_free_qdio_queues(card); 6643 6644 free_netdev(card->dev); 6645 qeth_core_free_card(card); 6646 put_device(&gdev->dev); 6647 } 6648 6649 static int qeth_core_set_online(struct ccwgroup_device *gdev) 6650 { 6651 struct qeth_card *card = dev_get_drvdata(&gdev->dev); 6652 int rc = 0; 6653 enum qeth_discipline_id def_discipline; 6654 6655 mutex_lock(&card->discipline_mutex); 6656 if (!card->discipline) { 6657 def_discipline = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 : 6658 QETH_DISCIPLINE_LAYER2; 6659 rc = qeth_setup_discipline(card, def_discipline); 6660 if (rc) 6661 goto err; 6662 } 6663 6664 rc = qeth_set_online(card, card->discipline); 6665 6666 err: 6667 mutex_unlock(&card->discipline_mutex); 6668 return rc; 6669 } 6670 6671 static int qeth_core_set_offline(struct ccwgroup_device *gdev) 6672 { 6673 struct qeth_card *card = dev_get_drvdata(&gdev->dev); 6674 int rc; 6675 6676 mutex_lock(&card->discipline_mutex); 6677 rc = qeth_set_offline(card, card->discipline, false); 6678 mutex_unlock(&card->discipline_mutex); 6679 6680 return rc; 6681 } 6682 6683 static void qeth_core_shutdown(struct ccwgroup_device *gdev) 6684 { 6685 struct qeth_card *card = dev_get_drvdata(&gdev->dev); 6686 6687 qeth_set_allowed_threads(card, 0, 1); 6688 if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap) 6689 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM); 6690 qeth_qdio_clear_card(card, 0); 6691 qeth_drain_output_queues(card); 6692 qdio_free(CARD_DDEV(card)); 6693 } 6694 6695 static ssize_t group_store(struct device_driver *ddrv, const char *buf, 6696 size_t count) 6697 { 6698 int err; 6699 6700 err = ccwgroup_create_dev(qeth_core_root_dev, to_ccwgroupdrv(ddrv), 3, 6701 buf); 6702 6703 return err ? err : count; 6704 } 6705 static DRIVER_ATTR_WO(group); 6706 6707 static struct attribute *qeth_drv_attrs[] = { 6708 &driver_attr_group.attr, 6709 NULL, 6710 }; 6711 static struct attribute_group qeth_drv_attr_group = { 6712 .attrs = qeth_drv_attrs, 6713 }; 6714 static const struct attribute_group *qeth_drv_attr_groups[] = { 6715 &qeth_drv_attr_group, 6716 NULL, 6717 }; 6718 6719 static struct ccwgroup_driver qeth_core_ccwgroup_driver = { 6720 .driver = { 6721 .groups = qeth_drv_attr_groups, 6722 .owner = THIS_MODULE, 6723 .name = "qeth", 6724 }, 6725 .ccw_driver = &qeth_ccw_driver, 6726 .setup = qeth_core_probe_device, 6727 .remove = qeth_core_remove_device, 6728 .set_online = qeth_core_set_online, 6729 .set_offline = qeth_core_set_offline, 6730 .shutdown = qeth_core_shutdown, 6731 }; 6732 6733 struct qeth_card *qeth_get_card_by_busid(char *bus_id) 6734 { 6735 struct ccwgroup_device *gdev; 6736 struct qeth_card *card; 6737 6738 gdev = get_ccwgroupdev_by_busid(&qeth_core_ccwgroup_driver, bus_id); 6739 if (!gdev) 6740 return NULL; 6741 6742 card = dev_get_drvdata(&gdev->dev); 6743 put_device(&gdev->dev); 6744 return card; 6745 } 6746 EXPORT_SYMBOL_GPL(qeth_get_card_by_busid); 6747 6748 int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) 6749 { 6750 struct qeth_card *card = dev->ml_priv; 6751 struct mii_ioctl_data *mii_data; 6752 int rc = 0; 6753 6754 switch (cmd) { 6755 case SIOC_QETH_ADP_SET_SNMP_CONTROL: 6756 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data); 6757 break; 6758 case SIOC_QETH_GET_CARD_TYPE: 6759 if ((IS_OSD(card) || IS_OSM(card) || IS_OSX(card)) && 6760 !IS_VM_NIC(card)) 6761 return 1; 6762 return 0; 6763 case SIOCGMIIPHY: 6764 mii_data = if_mii(rq); 6765 mii_data->phy_id = 0; 6766 break; 6767 case SIOCGMIIREG: 6768 mii_data = if_mii(rq); 6769 if (mii_data->phy_id != 0) 6770 rc = -EINVAL; 6771 else 6772 mii_data->val_out = qeth_mdio_read(dev, 6773 mii_data->phy_id, mii_data->reg_num); 6774 break; 6775 case SIOC_QETH_QUERY_OAT: 6776 rc = qeth_query_oat_command(card, rq->ifr_ifru.ifru_data); 6777 break; 6778 default: 6779 if (card->discipline->do_ioctl) 6780 rc = card->discipline->do_ioctl(dev, rq, cmd); 6781 else 6782 rc = -EOPNOTSUPP; 6783 } 6784 if (rc) 6785 QETH_CARD_TEXT_(card, 2, "ioce%x", rc); 6786 return rc; 6787 } 6788 EXPORT_SYMBOL_GPL(qeth_do_ioctl); 6789 6790 static int qeth_start_csum_cb(struct qeth_card *card, struct qeth_reply *reply, 6791 unsigned long data) 6792 { 6793 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; 6794 u32 *features = reply->param; 6795 6796 if (qeth_setassparms_inspect_rc(cmd)) 6797 return -EIO; 6798 6799 *features = cmd->data.setassparms.data.flags_32bit; 6800 return 0; 6801 } 6802 6803 static int qeth_set_csum_off(struct qeth_card *card, enum qeth_ipa_funcs cstype, 6804 enum qeth_prot_versions prot) 6805 { 6806 return qeth_send_simple_setassparms_prot(card, cstype, IPA_CMD_ASS_STOP, 6807 NULL, prot); 6808 } 6809 6810 static int qeth_set_csum_on(struct qeth_card *card, enum qeth_ipa_funcs cstype, 6811 enum qeth_prot_versions prot, u8 *lp2lp) 6812 { 6813 u32 required_features = QETH_IPA_CHECKSUM_UDP | QETH_IPA_CHECKSUM_TCP; 6814 struct qeth_cmd_buffer *iob; 6815 struct qeth_ipa_caps caps; 6816 u32 features; 6817 int rc; 6818 6819 /* some L3 HW requires combined L3+L4 csum offload: */ 6820 if (IS_LAYER3(card) && prot == QETH_PROT_IPV4 && 6821 cstype == IPA_OUTBOUND_CHECKSUM) 6822 required_features |= QETH_IPA_CHECKSUM_IP_HDR; 6823 6824 iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_START, 0, 6825 prot); 6826 if (!iob) 6827 return -ENOMEM; 6828 6829 rc = qeth_send_ipa_cmd(card, iob, qeth_start_csum_cb, &features); 6830 if (rc) 6831 return rc; 6832 6833 if ((required_features & features) != required_features) { 6834 qeth_set_csum_off(card, cstype, prot); 6835 return -EOPNOTSUPP; 6836 } 6837 6838 iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_ENABLE, 6839 SETASS_DATA_SIZEOF(flags_32bit), 6840 prot); 6841 if (!iob) { 6842 qeth_set_csum_off(card, cstype, prot); 6843 return -ENOMEM; 6844 } 6845 6846 if (features & QETH_IPA_CHECKSUM_LP2LP) 6847 required_features |= QETH_IPA_CHECKSUM_LP2LP; 6848 __ipa_cmd(iob)->data.setassparms.data.flags_32bit = required_features; 6849 rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps); 6850 if (rc) { 6851 qeth_set_csum_off(card, cstype, prot); 6852 return rc; 6853 } 6854 6855 if (!qeth_ipa_caps_supported(&caps, required_features) || 6856 !qeth_ipa_caps_enabled(&caps, required_features)) { 6857 qeth_set_csum_off(card, cstype, prot); 6858 return -EOPNOTSUPP; 6859 } 6860 6861 dev_info(&card->gdev->dev, "HW Checksumming (%sbound IPv%d) enabled\n", 6862 cstype == IPA_INBOUND_CHECKSUM ? "in" : "out", prot); 6863 6864 if (lp2lp) 6865 *lp2lp = qeth_ipa_caps_enabled(&caps, QETH_IPA_CHECKSUM_LP2LP); 6866 6867 return 0; 6868 } 6869 6870 static int qeth_set_ipa_csum(struct qeth_card *card, bool on, int cstype, 6871 enum qeth_prot_versions prot, u8 *lp2lp) 6872 { 6873 return on ? qeth_set_csum_on(card, cstype, prot, lp2lp) : 6874 qeth_set_csum_off(card, cstype, prot); 6875 } 6876 6877 static int qeth_start_tso_cb(struct qeth_card *card, struct qeth_reply *reply, 6878 unsigned long data) 6879 { 6880 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; 6881 struct qeth_tso_start_data *tso_data = reply->param; 6882 6883 if (qeth_setassparms_inspect_rc(cmd)) 6884 return -EIO; 6885 6886 tso_data->mss = cmd->data.setassparms.data.tso.mss; 6887 tso_data->supported = cmd->data.setassparms.data.tso.supported; 6888 return 0; 6889 } 6890 6891 static int qeth_set_tso_off(struct qeth_card *card, 6892 enum qeth_prot_versions prot) 6893 { 6894 return qeth_send_simple_setassparms_prot(card, IPA_OUTBOUND_TSO, 6895 IPA_CMD_ASS_STOP, NULL, prot); 6896 } 6897 6898 static int qeth_set_tso_on(struct qeth_card *card, 6899 enum qeth_prot_versions prot) 6900 { 6901 struct qeth_tso_start_data tso_data; 6902 struct qeth_cmd_buffer *iob; 6903 struct qeth_ipa_caps caps; 6904 int rc; 6905 6906 iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO, 6907 IPA_CMD_ASS_START, 0, prot); 6908 if (!iob) 6909 return -ENOMEM; 6910 6911 rc = qeth_send_ipa_cmd(card, iob, qeth_start_tso_cb, &tso_data); 6912 if (rc) 6913 return rc; 6914 6915 if (!tso_data.mss || !(tso_data.supported & QETH_IPA_LARGE_SEND_TCP)) { 6916 qeth_set_tso_off(card, prot); 6917 return -EOPNOTSUPP; 6918 } 6919 6920 iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO, 6921 IPA_CMD_ASS_ENABLE, 6922 SETASS_DATA_SIZEOF(caps), prot); 6923 if (!iob) { 6924 qeth_set_tso_off(card, prot); 6925 return -ENOMEM; 6926 } 6927 6928 /* enable TSO capability */ 6929 __ipa_cmd(iob)->data.setassparms.data.caps.enabled = 6930 QETH_IPA_LARGE_SEND_TCP; 6931 rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps); 6932 if (rc) { 6933 qeth_set_tso_off(card, prot); 6934 return rc; 6935 } 6936 6937 if (!qeth_ipa_caps_supported(&caps, QETH_IPA_LARGE_SEND_TCP) || 6938 !qeth_ipa_caps_enabled(&caps, QETH_IPA_LARGE_SEND_TCP)) { 6939 qeth_set_tso_off(card, prot); 6940 return -EOPNOTSUPP; 6941 } 6942 6943 dev_info(&card->gdev->dev, "TSOv%u enabled (MSS: %u)\n", prot, 6944 tso_data.mss); 6945 return 0; 6946 } 6947 6948 static int qeth_set_ipa_tso(struct qeth_card *card, bool on, 6949 enum qeth_prot_versions prot) 6950 { 6951 return on ? qeth_set_tso_on(card, prot) : qeth_set_tso_off(card, prot); 6952 } 6953 6954 static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on) 6955 { 6956 int rc_ipv4 = (on) ? -EOPNOTSUPP : 0; 6957 int rc_ipv6; 6958 6959 if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM)) 6960 rc_ipv4 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM, 6961 QETH_PROT_IPV4, NULL); 6962 if (!qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6)) 6963 /* no/one Offload Assist available, so the rc is trivial */ 6964 return rc_ipv4; 6965 6966 rc_ipv6 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM, 6967 QETH_PROT_IPV6, NULL); 6968 6969 if (on) 6970 /* enable: success if any Assist is active */ 6971 return (rc_ipv6) ? rc_ipv4 : 0; 6972 6973 /* disable: failure if any Assist is still active */ 6974 return (rc_ipv6) ? rc_ipv6 : rc_ipv4; 6975 } 6976 6977 /** 6978 * qeth_enable_hw_features() - (Re-)Enable HW functions for device features 6979 * @dev: a net_device 6980 */ 6981 void qeth_enable_hw_features(struct net_device *dev) 6982 { 6983 struct qeth_card *card = dev->ml_priv; 6984 netdev_features_t features; 6985 6986 features = dev->features; 6987 /* force-off any feature that might need an IPA sequence. 6988 * netdev_update_features() will restart them. 6989 */ 6990 dev->features &= ~dev->hw_features; 6991 /* toggle VLAN filter, so that VIDs are re-programmed: */ 6992 if (IS_LAYER2(card) && IS_VM_NIC(card)) { 6993 dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER; 6994 dev->wanted_features |= NETIF_F_HW_VLAN_CTAG_FILTER; 6995 } 6996 netdev_update_features(dev); 6997 if (features != dev->features) 6998 dev_warn(&card->gdev->dev, 6999 "Device recovery failed to restore all offload features\n"); 7000 } 7001 EXPORT_SYMBOL_GPL(qeth_enable_hw_features); 7002 7003 static void qeth_check_restricted_features(struct qeth_card *card, 7004 netdev_features_t changed, 7005 netdev_features_t actual) 7006 { 7007 netdev_features_t ipv6_features = NETIF_F_TSO6; 7008 netdev_features_t ipv4_features = NETIF_F_TSO; 7009 7010 if (!card->info.has_lp2lp_cso_v6) 7011 ipv6_features |= NETIF_F_IPV6_CSUM; 7012 if (!card->info.has_lp2lp_cso_v4) 7013 ipv4_features |= NETIF_F_IP_CSUM; 7014 7015 if ((changed & ipv6_features) && !(actual & ipv6_features)) 7016 qeth_flush_local_addrs6(card); 7017 if ((changed & ipv4_features) && !(actual & ipv4_features)) 7018 qeth_flush_local_addrs4(card); 7019 } 7020 7021 int qeth_set_features(struct net_device *dev, netdev_features_t features) 7022 { 7023 struct qeth_card *card = dev->ml_priv; 7024 netdev_features_t changed = dev->features ^ features; 7025 int rc = 0; 7026 7027 QETH_CARD_TEXT(card, 2, "setfeat"); 7028 QETH_CARD_HEX(card, 2, &features, sizeof(features)); 7029 7030 if ((changed & NETIF_F_IP_CSUM)) { 7031 rc = qeth_set_ipa_csum(card, features & NETIF_F_IP_CSUM, 7032 IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV4, 7033 &card->info.has_lp2lp_cso_v4); 7034 if (rc) 7035 changed ^= NETIF_F_IP_CSUM; 7036 } 7037 if (changed & NETIF_F_IPV6_CSUM) { 7038 rc = qeth_set_ipa_csum(card, features & NETIF_F_IPV6_CSUM, 7039 IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV6, 7040 &card->info.has_lp2lp_cso_v6); 7041 if (rc) 7042 changed ^= NETIF_F_IPV6_CSUM; 7043 } 7044 if (changed & NETIF_F_RXCSUM) { 7045 rc = qeth_set_ipa_rx_csum(card, features & NETIF_F_RXCSUM); 7046 if (rc) 7047 changed ^= NETIF_F_RXCSUM; 7048 } 7049 if (changed & NETIF_F_TSO) { 7050 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO, 7051 QETH_PROT_IPV4); 7052 if (rc) 7053 changed ^= NETIF_F_TSO; 7054 } 7055 if (changed & NETIF_F_TSO6) { 7056 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO6, 7057 QETH_PROT_IPV6); 7058 if (rc) 7059 changed ^= NETIF_F_TSO6; 7060 } 7061 7062 qeth_check_restricted_features(card, dev->features ^ features, 7063 dev->features ^ changed); 7064 7065 /* everything changed successfully? */ 7066 if ((dev->features ^ features) == changed) 7067 return 0; 7068 /* something went wrong. save changed features and return error */ 7069 dev->features ^= changed; 7070 return -EIO; 7071 } 7072 EXPORT_SYMBOL_GPL(qeth_set_features); 7073 7074 netdev_features_t qeth_fix_features(struct net_device *dev, 7075 netdev_features_t features) 7076 { 7077 struct qeth_card *card = dev->ml_priv; 7078 7079 QETH_CARD_TEXT(card, 2, "fixfeat"); 7080 if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM)) 7081 features &= ~NETIF_F_IP_CSUM; 7082 if (!qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6)) 7083 features &= ~NETIF_F_IPV6_CSUM; 7084 if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM) && 7085 !qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6)) 7086 features &= ~NETIF_F_RXCSUM; 7087 if (!qeth_is_supported(card, IPA_OUTBOUND_TSO)) 7088 features &= ~NETIF_F_TSO; 7089 if (!qeth_is_supported6(card, IPA_OUTBOUND_TSO)) 7090 features &= ~NETIF_F_TSO6; 7091 7092 QETH_CARD_HEX(card, 2, &features, sizeof(features)); 7093 return features; 7094 } 7095 EXPORT_SYMBOL_GPL(qeth_fix_features); 7096 7097 netdev_features_t qeth_features_check(struct sk_buff *skb, 7098 struct net_device *dev, 7099 netdev_features_t features) 7100 { 7101 struct qeth_card *card = dev->ml_priv; 7102 7103 /* Traffic with local next-hop is not eligible for some offloads: */ 7104 if (skb->ip_summed == CHECKSUM_PARTIAL && 7105 READ_ONCE(card->options.isolation) != ISOLATION_MODE_FWD) { 7106 netdev_features_t restricted = 0; 7107 7108 if (skb_is_gso(skb) && !netif_needs_gso(skb, features)) 7109 restricted |= NETIF_F_ALL_TSO; 7110 7111 switch (vlan_get_protocol(skb)) { 7112 case htons(ETH_P_IP): 7113 if (!card->info.has_lp2lp_cso_v4) 7114 restricted |= NETIF_F_IP_CSUM; 7115 7116 if (restricted && qeth_next_hop_is_local_v4(card, skb)) 7117 features &= ~restricted; 7118 break; 7119 case htons(ETH_P_IPV6): 7120 if (!card->info.has_lp2lp_cso_v6) 7121 restricted |= NETIF_F_IPV6_CSUM; 7122 7123 if (restricted && qeth_next_hop_is_local_v6(card, skb)) 7124 features &= ~restricted; 7125 break; 7126 default: 7127 break; 7128 } 7129 } 7130 7131 /* GSO segmentation builds skbs with 7132 * a (small) linear part for the headers, and 7133 * page frags for the data. 7134 * Compared to a linear skb, the header-only part consumes an 7135 * additional buffer element. This reduces buffer utilization, and 7136 * hurts throughput. So compress small segments into one element. 7137 */ 7138 if (netif_needs_gso(skb, features)) { 7139 /* match skb_segment(): */ 7140 unsigned int doffset = skb->data - skb_mac_header(skb); 7141 unsigned int hsize = skb_shinfo(skb)->gso_size; 7142 unsigned int hroom = skb_headroom(skb); 7143 7144 /* linearize only if resulting skb allocations are order-0: */ 7145 if (SKB_DATA_ALIGN(hroom + doffset + hsize) <= SKB_MAX_HEAD(0)) 7146 features &= ~NETIF_F_SG; 7147 } 7148 7149 return vlan_features_check(skb, features); 7150 } 7151 EXPORT_SYMBOL_GPL(qeth_features_check); 7152 7153 void qeth_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) 7154 { 7155 struct qeth_card *card = dev->ml_priv; 7156 struct qeth_qdio_out_q *queue; 7157 unsigned int i; 7158 7159 QETH_CARD_TEXT(card, 5, "getstat"); 7160 7161 stats->rx_packets = card->stats.rx_packets; 7162 stats->rx_bytes = card->stats.rx_bytes; 7163 stats->rx_errors = card->stats.rx_length_errors + 7164 card->stats.rx_frame_errors + 7165 card->stats.rx_fifo_errors; 7166 stats->rx_dropped = card->stats.rx_dropped_nomem + 7167 card->stats.rx_dropped_notsupp + 7168 card->stats.rx_dropped_runt; 7169 stats->multicast = card->stats.rx_multicast; 7170 stats->rx_length_errors = card->stats.rx_length_errors; 7171 stats->rx_frame_errors = card->stats.rx_frame_errors; 7172 stats->rx_fifo_errors = card->stats.rx_fifo_errors; 7173 7174 for (i = 0; i < card->qdio.no_out_queues; i++) { 7175 queue = card->qdio.out_qs[i]; 7176 7177 stats->tx_packets += queue->stats.tx_packets; 7178 stats->tx_bytes += queue->stats.tx_bytes; 7179 stats->tx_errors += queue->stats.tx_errors; 7180 stats->tx_dropped += queue->stats.tx_dropped; 7181 } 7182 } 7183 EXPORT_SYMBOL_GPL(qeth_get_stats64); 7184 7185 #define TC_IQD_UCAST 0 7186 static void qeth_iqd_set_prio_tc_map(struct net_device *dev, 7187 unsigned int ucast_txqs) 7188 { 7189 unsigned int prio; 7190 7191 /* IQD requires mcast traffic to be placed on a dedicated queue, and 7192 * qeth_iqd_select_queue() deals with this. 7193 * For unicast traffic, we defer the queue selection to the stack. 7194 * By installing a trivial prio map that spans over only the unicast 7195 * queues, we can encourage the stack to spread the ucast traffic evenly 7196 * without selecting the mcast queue. 7197 */ 7198 7199 /* One traffic class, spanning over all active ucast queues: */ 7200 netdev_set_num_tc(dev, 1); 7201 netdev_set_tc_queue(dev, TC_IQD_UCAST, ucast_txqs, 7202 QETH_IQD_MIN_UCAST_TXQ); 7203 7204 /* Map all priorities to this traffic class: */ 7205 for (prio = 0; prio <= TC_BITMASK; prio++) 7206 netdev_set_prio_tc_map(dev, prio, TC_IQD_UCAST); 7207 } 7208 7209 int qeth_set_real_num_tx_queues(struct qeth_card *card, unsigned int count) 7210 { 7211 struct net_device *dev = card->dev; 7212 int rc; 7213 7214 /* Per netif_setup_tc(), adjust the mapping first: */ 7215 if (IS_IQD(card)) 7216 qeth_iqd_set_prio_tc_map(dev, count - 1); 7217 7218 rc = netif_set_real_num_tx_queues(dev, count); 7219 7220 if (rc && IS_IQD(card)) 7221 qeth_iqd_set_prio_tc_map(dev, dev->real_num_tx_queues - 1); 7222 7223 return rc; 7224 } 7225 EXPORT_SYMBOL_GPL(qeth_set_real_num_tx_queues); 7226 7227 u16 qeth_iqd_select_queue(struct net_device *dev, struct sk_buff *skb, 7228 u8 cast_type, struct net_device *sb_dev) 7229 { 7230 u16 txq; 7231 7232 if (cast_type != RTN_UNICAST) 7233 return QETH_IQD_MCAST_TXQ; 7234 if (dev->real_num_tx_queues == QETH_IQD_MIN_TXQ) 7235 return QETH_IQD_MIN_UCAST_TXQ; 7236 7237 txq = netdev_pick_tx(dev, skb, sb_dev); 7238 return (txq == QETH_IQD_MCAST_TXQ) ? QETH_IQD_MIN_UCAST_TXQ : txq; 7239 } 7240 EXPORT_SYMBOL_GPL(qeth_iqd_select_queue); 7241 7242 int qeth_open(struct net_device *dev) 7243 { 7244 struct qeth_card *card = dev->ml_priv; 7245 7246 QETH_CARD_TEXT(card, 4, "qethopen"); 7247 7248 card->data.state = CH_STATE_UP; 7249 netif_tx_start_all_queues(dev); 7250 7251 napi_enable(&card->napi); 7252 local_bh_disable(); 7253 napi_schedule(&card->napi); 7254 if (IS_IQD(card)) { 7255 struct qeth_qdio_out_q *queue; 7256 unsigned int i; 7257 7258 qeth_for_each_output_queue(card, queue, i) { 7259 netif_tx_napi_add(dev, &queue->napi, qeth_tx_poll, 7260 QETH_NAPI_WEIGHT); 7261 napi_enable(&queue->napi); 7262 napi_schedule(&queue->napi); 7263 } 7264 } 7265 /* kick-start the NAPI softirq: */ 7266 local_bh_enable(); 7267 return 0; 7268 } 7269 EXPORT_SYMBOL_GPL(qeth_open); 7270 7271 int qeth_stop(struct net_device *dev) 7272 { 7273 struct qeth_card *card = dev->ml_priv; 7274 7275 QETH_CARD_TEXT(card, 4, "qethstop"); 7276 if (IS_IQD(card)) { 7277 struct qeth_qdio_out_q *queue; 7278 unsigned int i; 7279 7280 /* Quiesce the NAPI instances: */ 7281 qeth_for_each_output_queue(card, queue, i) 7282 napi_disable(&queue->napi); 7283 7284 /* Stop .ndo_start_xmit, might still access queue->napi. */ 7285 netif_tx_disable(dev); 7286 7287 qeth_for_each_output_queue(card, queue, i) { 7288 del_timer_sync(&queue->timer); 7289 /* Queues may get re-allocated, so remove the NAPIs. */ 7290 netif_napi_del(&queue->napi); 7291 } 7292 } else { 7293 netif_tx_disable(dev); 7294 } 7295 7296 napi_disable(&card->napi); 7297 cancel_delayed_work_sync(&card->buffer_reclaim_work); 7298 qdio_stop_irq(CARD_DDEV(card)); 7299 7300 return 0; 7301 } 7302 EXPORT_SYMBOL_GPL(qeth_stop); 7303 7304 static int __init qeth_core_init(void) 7305 { 7306 int rc; 7307 7308 pr_info("loading core functions\n"); 7309 7310 qeth_debugfs_root = debugfs_create_dir("qeth", NULL); 7311 7312 rc = qeth_register_dbf_views(); 7313 if (rc) 7314 goto dbf_err; 7315 qeth_core_root_dev = root_device_register("qeth"); 7316 rc = PTR_ERR_OR_ZERO(qeth_core_root_dev); 7317 if (rc) 7318 goto register_err; 7319 qeth_core_header_cache = 7320 kmem_cache_create("qeth_hdr", QETH_HDR_CACHE_OBJ_SIZE, 7321 roundup_pow_of_two(QETH_HDR_CACHE_OBJ_SIZE), 7322 0, NULL); 7323 if (!qeth_core_header_cache) { 7324 rc = -ENOMEM; 7325 goto slab_err; 7326 } 7327 qeth_qdio_outbuf_cache = kmem_cache_create("qeth_buf", 7328 sizeof(struct qeth_qdio_out_buffer), 0, 0, NULL); 7329 if (!qeth_qdio_outbuf_cache) { 7330 rc = -ENOMEM; 7331 goto cqslab_err; 7332 } 7333 rc = ccw_driver_register(&qeth_ccw_driver); 7334 if (rc) 7335 goto ccw_err; 7336 rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver); 7337 if (rc) 7338 goto ccwgroup_err; 7339 7340 return 0; 7341 7342 ccwgroup_err: 7343 ccw_driver_unregister(&qeth_ccw_driver); 7344 ccw_err: 7345 kmem_cache_destroy(qeth_qdio_outbuf_cache); 7346 cqslab_err: 7347 kmem_cache_destroy(qeth_core_header_cache); 7348 slab_err: 7349 root_device_unregister(qeth_core_root_dev); 7350 register_err: 7351 qeth_unregister_dbf_views(); 7352 dbf_err: 7353 debugfs_remove_recursive(qeth_debugfs_root); 7354 pr_err("Initializing the qeth device driver failed\n"); 7355 return rc; 7356 } 7357 7358 static void __exit qeth_core_exit(void) 7359 { 7360 qeth_clear_dbf_list(); 7361 ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver); 7362 ccw_driver_unregister(&qeth_ccw_driver); 7363 kmem_cache_destroy(qeth_qdio_outbuf_cache); 7364 kmem_cache_destroy(qeth_core_header_cache); 7365 root_device_unregister(qeth_core_root_dev); 7366 qeth_unregister_dbf_views(); 7367 debugfs_remove_recursive(qeth_debugfs_root); 7368 pr_info("core functions removed\n"); 7369 } 7370 7371 module_init(qeth_core_init); 7372 module_exit(qeth_core_exit); 7373 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>"); 7374 MODULE_DESCRIPTION("qeth core functions"); 7375 MODULE_LICENSE("GPL"); 7376