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 pr_fmt(fmt) "qeth: " fmt 11 12 #include <linux/export.h> 13 #include <linux/module.h> 14 #include <linux/moduleparam.h> 15 #include <linux/string.h> 16 #include <linux/errno.h> 17 #include <linux/kernel.h> 18 #include <linux/log2.h> 19 #include <linux/io.h> 20 #include <linux/ip.h> 21 #include <linux/tcp.h> 22 #include <linux/mii.h> 23 #include <linux/mm.h> 24 #include <linux/kthread.h> 25 #include <linux/slab.h> 26 #include <linux/if_vlan.h> 27 #include <linux/netdevice.h> 28 #include <linux/netdev_features.h> 29 #include <linux/rcutree.h> 30 #include <linux/skbuff.h> 31 #include <linux/vmalloc.h> 32 33 #include <net/iucv/af_iucv.h> 34 #include <net/dsfield.h> 35 #include <net/sock.h> 36 37 #include <asm/ebcdic.h> 38 #include <asm/chpid.h> 39 #include <asm/sysinfo.h> 40 #include <asm/diag.h> 41 #include <asm/cio.h> 42 #include <asm/ccwdev.h> 43 #include <asm/cpcmd.h> 44 45 #include "qeth_core.h" 46 47 struct qeth_dbf_info qeth_dbf[QETH_DBF_INFOS] = { 48 /* define dbf - Name, Pages, Areas, Maxlen, Level, View, Handle */ 49 /* N P A M L V H */ 50 [QETH_DBF_SETUP] = {"qeth_setup", 51 8, 1, 8, 5, &debug_hex_ascii_view, NULL}, 52 [QETH_DBF_MSG] = {"qeth_msg", 8, 1, 11 * sizeof(long), 3, 53 &debug_sprintf_view, NULL}, 54 [QETH_DBF_CTRL] = {"qeth_control", 55 8, 1, QETH_DBF_CTRL_LEN, 5, &debug_hex_ascii_view, NULL}, 56 }; 57 EXPORT_SYMBOL_GPL(qeth_dbf); 58 59 static struct kmem_cache *qeth_core_header_cache; 60 static struct kmem_cache *qeth_qdio_outbuf_cache; 61 static struct kmem_cache *qeth_qaob_cache; 62 63 static struct device *qeth_core_root_dev; 64 static struct dentry *qeth_debugfs_root; 65 static struct lock_class_key qdio_out_skb_queue_key; 66 67 static void qeth_issue_next_read_cb(struct qeth_card *card, 68 struct qeth_cmd_buffer *iob, 69 unsigned int data_length); 70 static int qeth_qdio_establish(struct qeth_card *); 71 static void qeth_free_qdio_queues(struct qeth_card *card); 72 73 static const char *qeth_get_cardname(struct qeth_card *card) 74 { 75 if (IS_VM_NIC(card)) { 76 switch (card->info.type) { 77 case QETH_CARD_TYPE_OSD: 78 return " Virtual NIC QDIO"; 79 case QETH_CARD_TYPE_IQD: 80 return " Virtual NIC Hiper"; 81 case QETH_CARD_TYPE_OSM: 82 return " Virtual NIC QDIO - OSM"; 83 case QETH_CARD_TYPE_OSX: 84 return " Virtual NIC QDIO - OSX"; 85 default: 86 return " unknown"; 87 } 88 } else { 89 switch (card->info.type) { 90 case QETH_CARD_TYPE_OSD: 91 return " OSD Express"; 92 case QETH_CARD_TYPE_IQD: 93 return " HiperSockets"; 94 case QETH_CARD_TYPE_OSM: 95 return " OSM QDIO"; 96 case QETH_CARD_TYPE_OSX: 97 return " OSX QDIO"; 98 default: 99 return " unknown"; 100 } 101 } 102 return " n/a"; 103 } 104 105 /* max length to be returned: 14 */ 106 const char *qeth_get_cardname_short(struct qeth_card *card) 107 { 108 if (IS_VM_NIC(card)) { 109 switch (card->info.type) { 110 case QETH_CARD_TYPE_OSD: 111 return "Virt.NIC QDIO"; 112 case QETH_CARD_TYPE_IQD: 113 return "Virt.NIC Hiper"; 114 case QETH_CARD_TYPE_OSM: 115 return "Virt.NIC OSM"; 116 case QETH_CARD_TYPE_OSX: 117 return "Virt.NIC OSX"; 118 default: 119 return "unknown"; 120 } 121 } else { 122 switch (card->info.type) { 123 case QETH_CARD_TYPE_OSD: 124 switch (card->info.link_type) { 125 case QETH_LINK_TYPE_FAST_ETH: 126 return "OSD_100"; 127 case QETH_LINK_TYPE_HSTR: 128 return "HSTR"; 129 case QETH_LINK_TYPE_GBIT_ETH: 130 return "OSD_1000"; 131 case QETH_LINK_TYPE_10GBIT_ETH: 132 return "OSD_10GIG"; 133 case QETH_LINK_TYPE_25GBIT_ETH: 134 return "OSD_25GIG"; 135 case QETH_LINK_TYPE_LANE_ETH100: 136 return "OSD_FE_LANE"; 137 case QETH_LINK_TYPE_LANE_TR: 138 return "OSD_TR_LANE"; 139 case QETH_LINK_TYPE_LANE_ETH1000: 140 return "OSD_GbE_LANE"; 141 case QETH_LINK_TYPE_LANE: 142 return "OSD_ATM_LANE"; 143 default: 144 return "OSD_Express"; 145 } 146 case QETH_CARD_TYPE_IQD: 147 return "HiperSockets"; 148 case QETH_CARD_TYPE_OSM: 149 return "OSM_1000"; 150 case QETH_CARD_TYPE_OSX: 151 return "OSX_10GIG"; 152 default: 153 return "unknown"; 154 } 155 } 156 return "n/a"; 157 } 158 159 void qeth_set_allowed_threads(struct qeth_card *card, unsigned long threads, 160 int clear_start_mask) 161 { 162 unsigned long flags; 163 164 spin_lock_irqsave(&card->thread_mask_lock, flags); 165 card->thread_allowed_mask = threads; 166 if (clear_start_mask) 167 card->thread_start_mask &= threads; 168 spin_unlock_irqrestore(&card->thread_mask_lock, flags); 169 wake_up(&card->wait_q); 170 } 171 EXPORT_SYMBOL_GPL(qeth_set_allowed_threads); 172 173 int qeth_threads_running(struct qeth_card *card, unsigned long threads) 174 { 175 unsigned long flags; 176 int rc = 0; 177 178 spin_lock_irqsave(&card->thread_mask_lock, flags); 179 rc = (card->thread_running_mask & threads); 180 spin_unlock_irqrestore(&card->thread_mask_lock, flags); 181 return rc; 182 } 183 EXPORT_SYMBOL_GPL(qeth_threads_running); 184 185 static void qeth_clear_working_pool_list(struct qeth_card *card) 186 { 187 struct qeth_buffer_pool_entry *pool_entry, *tmp; 188 struct qeth_qdio_q *queue = card->qdio.in_q; 189 unsigned int i; 190 191 QETH_CARD_TEXT(card, 5, "clwrklst"); 192 list_for_each_entry_safe(pool_entry, tmp, 193 &card->qdio.in_buf_pool.entry_list, list) 194 list_del(&pool_entry->list); 195 196 for (i = 0; i < ARRAY_SIZE(queue->bufs); i++) 197 queue->bufs[i].pool_entry = NULL; 198 } 199 200 static void qeth_free_pool_entry(struct qeth_buffer_pool_entry *entry) 201 { 202 unsigned int i; 203 204 for (i = 0; i < ARRAY_SIZE(entry->elements); i++) { 205 if (entry->elements[i]) 206 __free_page(entry->elements[i]); 207 } 208 209 kfree(entry); 210 } 211 212 static void qeth_free_buffer_pool(struct qeth_card *card) 213 { 214 struct qeth_buffer_pool_entry *entry, *tmp; 215 216 list_for_each_entry_safe(entry, tmp, &card->qdio.init_pool.entry_list, 217 init_list) { 218 list_del(&entry->init_list); 219 qeth_free_pool_entry(entry); 220 } 221 } 222 223 static struct qeth_buffer_pool_entry *qeth_alloc_pool_entry(unsigned int pages) 224 { 225 struct qeth_buffer_pool_entry *entry; 226 unsigned int i; 227 228 entry = kzalloc(sizeof(*entry), GFP_KERNEL); 229 if (!entry) 230 return NULL; 231 232 for (i = 0; i < pages; i++) { 233 entry->elements[i] = __dev_alloc_page(GFP_KERNEL); 234 235 if (!entry->elements[i]) { 236 qeth_free_pool_entry(entry); 237 return NULL; 238 } 239 } 240 241 return entry; 242 } 243 244 static int qeth_alloc_buffer_pool(struct qeth_card *card) 245 { 246 unsigned int buf_elements = QETH_MAX_BUFFER_ELEMENTS(card); 247 unsigned int i; 248 249 QETH_CARD_TEXT(card, 5, "alocpool"); 250 for (i = 0; i < card->qdio.init_pool.buf_count; ++i) { 251 struct qeth_buffer_pool_entry *entry; 252 253 entry = qeth_alloc_pool_entry(buf_elements); 254 if (!entry) { 255 qeth_free_buffer_pool(card); 256 return -ENOMEM; 257 } 258 259 list_add(&entry->init_list, &card->qdio.init_pool.entry_list); 260 } 261 return 0; 262 } 263 264 int qeth_resize_buffer_pool(struct qeth_card *card, unsigned int count) 265 { 266 unsigned int buf_elements = QETH_MAX_BUFFER_ELEMENTS(card); 267 struct qeth_qdio_buffer_pool *pool = &card->qdio.init_pool; 268 struct qeth_buffer_pool_entry *entry, *tmp; 269 int delta = count - pool->buf_count; 270 LIST_HEAD(entries); 271 272 QETH_CARD_TEXT(card, 2, "realcbp"); 273 274 /* Defer until pool is allocated: */ 275 if (list_empty(&pool->entry_list)) 276 goto out; 277 278 /* Remove entries from the pool: */ 279 while (delta < 0) { 280 entry = list_first_entry(&pool->entry_list, 281 struct qeth_buffer_pool_entry, 282 init_list); 283 list_del(&entry->init_list); 284 qeth_free_pool_entry(entry); 285 286 delta++; 287 } 288 289 /* Allocate additional entries: */ 290 while (delta > 0) { 291 entry = qeth_alloc_pool_entry(buf_elements); 292 if (!entry) { 293 list_for_each_entry_safe(entry, tmp, &entries, 294 init_list) { 295 list_del(&entry->init_list); 296 qeth_free_pool_entry(entry); 297 } 298 299 return -ENOMEM; 300 } 301 302 list_add(&entry->init_list, &entries); 303 304 delta--; 305 } 306 307 list_splice(&entries, &pool->entry_list); 308 309 out: 310 card->qdio.in_buf_pool.buf_count = count; 311 pool->buf_count = count; 312 return 0; 313 } 314 EXPORT_SYMBOL_GPL(qeth_resize_buffer_pool); 315 316 static void qeth_free_qdio_queue(struct qeth_qdio_q *q) 317 { 318 if (!q) 319 return; 320 321 qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q); 322 kfree(q); 323 } 324 325 static struct qeth_qdio_q *qeth_alloc_qdio_queue(void) 326 { 327 struct qeth_qdio_q *q = kzalloc(sizeof(*q), GFP_KERNEL); 328 int i; 329 330 if (!q) 331 return NULL; 332 333 if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) { 334 kfree(q); 335 return NULL; 336 } 337 338 for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i) 339 q->bufs[i].buffer = q->qdio_bufs[i]; 340 341 QETH_DBF_HEX(SETUP, 2, &q, sizeof(void *)); 342 return q; 343 } 344 345 static int qeth_cq_init(struct qeth_card *card) 346 { 347 int rc; 348 349 if (card->options.cq == QETH_CQ_ENABLED) { 350 QETH_CARD_TEXT(card, 2, "cqinit"); 351 qdio_reset_buffers(card->qdio.c_q->qdio_bufs, 352 QDIO_MAX_BUFFERS_PER_Q); 353 card->qdio.c_q->next_buf_to_init = 127; 354 355 rc = qdio_add_bufs_to_input_queue(CARD_DDEV(card), 1, 0, 127); 356 if (rc) { 357 QETH_CARD_TEXT_(card, 2, "1err%d", rc); 358 goto out; 359 } 360 } 361 rc = 0; 362 out: 363 return rc; 364 } 365 366 static void qeth_free_cq(struct qeth_card *card) 367 { 368 if (card->qdio.c_q) { 369 qeth_free_qdio_queue(card->qdio.c_q); 370 card->qdio.c_q = NULL; 371 } 372 } 373 374 static int qeth_alloc_cq(struct qeth_card *card) 375 { 376 if (card->options.cq == QETH_CQ_ENABLED) { 377 QETH_CARD_TEXT(card, 2, "cqon"); 378 if (!card->qdio.c_q) { 379 card->qdio.c_q = qeth_alloc_qdio_queue(); 380 if (!card->qdio.c_q) { 381 dev_err(&card->gdev->dev, 382 "Failed to create completion queue\n"); 383 return -ENOMEM; 384 } 385 } 386 } else { 387 QETH_CARD_TEXT(card, 2, "nocq"); 388 qeth_free_cq(card); 389 } 390 return 0; 391 } 392 393 static enum iucv_tx_notify qeth_compute_cq_notification(int sbalf15, 394 int delayed) 395 { 396 enum iucv_tx_notify n; 397 398 switch (sbalf15) { 399 case 0: 400 n = delayed ? TX_NOTIFY_DELAYED_OK : TX_NOTIFY_OK; 401 break; 402 case 4: 403 case 16: 404 case 17: 405 case 18: 406 n = delayed ? TX_NOTIFY_DELAYED_UNREACHABLE : 407 TX_NOTIFY_UNREACHABLE; 408 break; 409 default: 410 n = delayed ? TX_NOTIFY_DELAYED_GENERALERROR : 411 TX_NOTIFY_GENERALERROR; 412 break; 413 } 414 415 return n; 416 } 417 418 static void qeth_put_cmd(struct qeth_cmd_buffer *iob) 419 { 420 if (refcount_dec_and_test(&iob->ref_count)) { 421 kfree(iob->data); 422 kfree(iob); 423 } 424 } 425 static void qeth_setup_ccw(struct ccw1 *ccw, u8 cmd_code, u8 flags, u32 len, 426 void *data) 427 { 428 ccw->cmd_code = cmd_code; 429 ccw->flags = flags | CCW_FLAG_SLI; 430 ccw->count = len; 431 ccw->cda = virt_to_dma32(data); 432 } 433 434 static int __qeth_issue_next_read(struct qeth_card *card) 435 { 436 struct qeth_cmd_buffer *iob = card->read_cmd; 437 struct qeth_channel *channel = iob->channel; 438 struct ccw1 *ccw = __ccw_from_cmd(iob); 439 int rc; 440 441 QETH_CARD_TEXT(card, 5, "issnxrd"); 442 if (channel->state != CH_STATE_UP) 443 return -EIO; 444 445 memset(iob->data, 0, iob->length); 446 qeth_setup_ccw(ccw, CCW_CMD_READ, 0, iob->length, iob->data); 447 iob->callback = qeth_issue_next_read_cb; 448 /* keep the cmd alive after completion: */ 449 qeth_get_cmd(iob); 450 451 QETH_CARD_TEXT(card, 6, "noirqpnd"); 452 rc = ccw_device_start(channel->ccwdev, ccw, (addr_t) iob, 0, 0); 453 if (!rc) { 454 channel->active_cmd = iob; 455 } else { 456 QETH_DBF_MESSAGE(2, "error %i on device %x when starting next read ccw!\n", 457 rc, CARD_DEVID(card)); 458 qeth_unlock_channel(card, channel); 459 qeth_put_cmd(iob); 460 card->read_or_write_problem = 1; 461 qeth_schedule_recovery(card); 462 } 463 return rc; 464 } 465 466 static int qeth_issue_next_read(struct qeth_card *card) 467 { 468 int ret; 469 470 spin_lock_irq(get_ccwdev_lock(CARD_RDEV(card))); 471 ret = __qeth_issue_next_read(card); 472 spin_unlock_irq(get_ccwdev_lock(CARD_RDEV(card))); 473 474 return ret; 475 } 476 477 static void qeth_enqueue_cmd(struct qeth_card *card, 478 struct qeth_cmd_buffer *iob) 479 { 480 spin_lock_irq(&card->lock); 481 list_add_tail(&iob->list_entry, &card->cmd_waiter_list); 482 spin_unlock_irq(&card->lock); 483 } 484 485 static void qeth_dequeue_cmd(struct qeth_card *card, 486 struct qeth_cmd_buffer *iob) 487 { 488 spin_lock_irq(&card->lock); 489 list_del(&iob->list_entry); 490 spin_unlock_irq(&card->lock); 491 } 492 493 static void qeth_notify_cmd(struct qeth_cmd_buffer *iob, int reason) 494 { 495 iob->rc = reason; 496 complete(&iob->done); 497 } 498 499 static void qeth_flush_local_addrs4(struct qeth_card *card) 500 { 501 struct qeth_local_addr *addr; 502 struct hlist_node *tmp; 503 unsigned int i; 504 505 spin_lock_irq(&card->local_addrs4_lock); 506 hash_for_each_safe(card->local_addrs4, i, tmp, addr, hnode) { 507 hash_del_rcu(&addr->hnode); 508 kfree_rcu(addr, rcu); 509 } 510 spin_unlock_irq(&card->local_addrs4_lock); 511 } 512 513 static void qeth_flush_local_addrs6(struct qeth_card *card) 514 { 515 struct qeth_local_addr *addr; 516 struct hlist_node *tmp; 517 unsigned int i; 518 519 spin_lock_irq(&card->local_addrs6_lock); 520 hash_for_each_safe(card->local_addrs6, i, tmp, addr, hnode) { 521 hash_del_rcu(&addr->hnode); 522 kfree_rcu(addr, rcu); 523 } 524 spin_unlock_irq(&card->local_addrs6_lock); 525 } 526 527 static void qeth_flush_local_addrs(struct qeth_card *card) 528 { 529 qeth_flush_local_addrs4(card); 530 qeth_flush_local_addrs6(card); 531 } 532 533 static void qeth_add_local_addrs4(struct qeth_card *card, 534 struct qeth_ipacmd_local_addrs4 *cmd) 535 { 536 unsigned int i; 537 538 if (cmd->addr_length != 539 sizeof_field(struct qeth_ipacmd_local_addr4, addr)) { 540 dev_err_ratelimited(&card->gdev->dev, 541 "Dropped IPv4 ADD LOCAL ADDR event with bad length %u\n", 542 cmd->addr_length); 543 return; 544 } 545 546 spin_lock(&card->local_addrs4_lock); 547 for (i = 0; i < cmd->count; i++) { 548 unsigned int key = ipv4_addr_hash(cmd->addrs[i].addr); 549 struct qeth_local_addr *addr; 550 bool duplicate = false; 551 552 hash_for_each_possible(card->local_addrs4, addr, hnode, key) { 553 if (addr->addr.s6_addr32[3] == cmd->addrs[i].addr) { 554 duplicate = true; 555 break; 556 } 557 } 558 559 if (duplicate) 560 continue; 561 562 addr = kmalloc(sizeof(*addr), GFP_ATOMIC); 563 if (!addr) { 564 dev_err(&card->gdev->dev, 565 "Failed to allocate local addr object. Traffic to %pI4 might suffer.\n", 566 &cmd->addrs[i].addr); 567 continue; 568 } 569 570 ipv6_addr_set(&addr->addr, 0, 0, 0, cmd->addrs[i].addr); 571 hash_add_rcu(card->local_addrs4, &addr->hnode, key); 572 } 573 spin_unlock(&card->local_addrs4_lock); 574 } 575 576 static void qeth_add_local_addrs6(struct qeth_card *card, 577 struct qeth_ipacmd_local_addrs6 *cmd) 578 { 579 unsigned int i; 580 581 if (cmd->addr_length != 582 sizeof_field(struct qeth_ipacmd_local_addr6, addr)) { 583 dev_err_ratelimited(&card->gdev->dev, 584 "Dropped IPv6 ADD LOCAL ADDR event with bad length %u\n", 585 cmd->addr_length); 586 return; 587 } 588 589 spin_lock(&card->local_addrs6_lock); 590 for (i = 0; i < cmd->count; i++) { 591 u32 key = ipv6_addr_hash(&cmd->addrs[i].addr); 592 struct qeth_local_addr *addr; 593 bool duplicate = false; 594 595 hash_for_each_possible(card->local_addrs6, addr, hnode, key) { 596 if (ipv6_addr_equal(&addr->addr, &cmd->addrs[i].addr)) { 597 duplicate = true; 598 break; 599 } 600 } 601 602 if (duplicate) 603 continue; 604 605 addr = kmalloc(sizeof(*addr), GFP_ATOMIC); 606 if (!addr) { 607 dev_err(&card->gdev->dev, 608 "Failed to allocate local addr object. Traffic to %pI6c might suffer.\n", 609 &cmd->addrs[i].addr); 610 continue; 611 } 612 613 addr->addr = cmd->addrs[i].addr; 614 hash_add_rcu(card->local_addrs6, &addr->hnode, key); 615 } 616 spin_unlock(&card->local_addrs6_lock); 617 } 618 619 static void qeth_del_local_addrs4(struct qeth_card *card, 620 struct qeth_ipacmd_local_addrs4 *cmd) 621 { 622 unsigned int i; 623 624 if (cmd->addr_length != 625 sizeof_field(struct qeth_ipacmd_local_addr4, addr)) { 626 dev_err_ratelimited(&card->gdev->dev, 627 "Dropped IPv4 DEL LOCAL ADDR event with bad length %u\n", 628 cmd->addr_length); 629 return; 630 } 631 632 spin_lock(&card->local_addrs4_lock); 633 for (i = 0; i < cmd->count; i++) { 634 struct qeth_ipacmd_local_addr4 *addr = &cmd->addrs[i]; 635 unsigned int key = ipv4_addr_hash(addr->addr); 636 struct qeth_local_addr *tmp; 637 638 hash_for_each_possible(card->local_addrs4, tmp, hnode, key) { 639 if (tmp->addr.s6_addr32[3] == addr->addr) { 640 hash_del_rcu(&tmp->hnode); 641 kfree_rcu(tmp, rcu); 642 break; 643 } 644 } 645 } 646 spin_unlock(&card->local_addrs4_lock); 647 } 648 649 static void qeth_del_local_addrs6(struct qeth_card *card, 650 struct qeth_ipacmd_local_addrs6 *cmd) 651 { 652 unsigned int i; 653 654 if (cmd->addr_length != 655 sizeof_field(struct qeth_ipacmd_local_addr6, addr)) { 656 dev_err_ratelimited(&card->gdev->dev, 657 "Dropped IPv6 DEL LOCAL ADDR event with bad length %u\n", 658 cmd->addr_length); 659 return; 660 } 661 662 spin_lock(&card->local_addrs6_lock); 663 for (i = 0; i < cmd->count; i++) { 664 struct qeth_ipacmd_local_addr6 *addr = &cmd->addrs[i]; 665 u32 key = ipv6_addr_hash(&addr->addr); 666 struct qeth_local_addr *tmp; 667 668 hash_for_each_possible(card->local_addrs6, tmp, hnode, key) { 669 if (ipv6_addr_equal(&tmp->addr, &addr->addr)) { 670 hash_del_rcu(&tmp->hnode); 671 kfree_rcu(tmp, rcu); 672 break; 673 } 674 } 675 } 676 spin_unlock(&card->local_addrs6_lock); 677 } 678 679 static bool qeth_next_hop_is_local_v4(struct qeth_card *card, 680 struct sk_buff *skb) 681 { 682 struct qeth_local_addr *tmp; 683 bool is_local = false; 684 unsigned int key; 685 __be32 next_hop; 686 687 if (hash_empty(card->local_addrs4)) 688 return false; 689 690 rcu_read_lock(); 691 next_hop = qeth_next_hop_v4_rcu(skb, 692 qeth_dst_check_rcu(skb, htons(ETH_P_IP))); 693 key = ipv4_addr_hash(next_hop); 694 695 hash_for_each_possible_rcu(card->local_addrs4, tmp, hnode, key) { 696 if (tmp->addr.s6_addr32[3] == next_hop) { 697 is_local = true; 698 break; 699 } 700 } 701 rcu_read_unlock(); 702 703 return is_local; 704 } 705 706 static bool qeth_next_hop_is_local_v6(struct qeth_card *card, 707 struct sk_buff *skb) 708 { 709 struct qeth_local_addr *tmp; 710 struct in6_addr *next_hop; 711 bool is_local = false; 712 u32 key; 713 714 if (hash_empty(card->local_addrs6)) 715 return false; 716 717 rcu_read_lock(); 718 next_hop = qeth_next_hop_v6_rcu(skb, 719 qeth_dst_check_rcu(skb, htons(ETH_P_IPV6))); 720 key = ipv6_addr_hash(next_hop); 721 722 hash_for_each_possible_rcu(card->local_addrs6, tmp, hnode, key) { 723 if (ipv6_addr_equal(&tmp->addr, next_hop)) { 724 is_local = true; 725 break; 726 } 727 } 728 rcu_read_unlock(); 729 730 return is_local; 731 } 732 733 static int qeth_debugfs_local_addr_show(struct seq_file *m, void *v) 734 { 735 struct qeth_card *card = m->private; 736 struct qeth_local_addr *tmp; 737 unsigned int i; 738 739 rcu_read_lock(); 740 hash_for_each_rcu(card->local_addrs4, i, tmp, hnode) 741 seq_printf(m, "%pI4\n", &tmp->addr.s6_addr32[3]); 742 hash_for_each_rcu(card->local_addrs6, i, tmp, hnode) 743 seq_printf(m, "%pI6c\n", &tmp->addr); 744 rcu_read_unlock(); 745 746 return 0; 747 } 748 749 DEFINE_SHOW_ATTRIBUTE(qeth_debugfs_local_addr); 750 751 static void qeth_issue_ipa_msg(struct qeth_ipa_cmd *cmd, int rc, 752 struct qeth_card *card) 753 { 754 const char *ipa_name; 755 int com = cmd->hdr.command; 756 757 ipa_name = qeth_get_ipa_cmd_name(com); 758 759 if (rc) 760 QETH_DBF_MESSAGE(2, "IPA: %s(%#x) for device %x returned %#x \"%s\"\n", 761 ipa_name, com, CARD_DEVID(card), rc, 762 qeth_get_ipa_msg(rc)); 763 else 764 QETH_DBF_MESSAGE(5, "IPA: %s(%#x) for device %x succeeded\n", 765 ipa_name, com, CARD_DEVID(card)); 766 } 767 768 static void qeth_default_link_info(struct qeth_card *card) 769 { 770 struct qeth_link_info *link_info = &card->info.link_info; 771 772 QETH_CARD_TEXT(card, 2, "dftlinfo"); 773 link_info->duplex = DUPLEX_FULL; 774 775 if (IS_IQD(card) || IS_VM_NIC(card)) { 776 link_info->speed = SPEED_10000; 777 link_info->port = PORT_FIBRE; 778 link_info->link_mode = QETH_LINK_MODE_FIBRE_SHORT; 779 } else { 780 switch (card->info.link_type) { 781 case QETH_LINK_TYPE_FAST_ETH: 782 case QETH_LINK_TYPE_LANE_ETH100: 783 link_info->speed = SPEED_100; 784 link_info->port = PORT_TP; 785 break; 786 case QETH_LINK_TYPE_GBIT_ETH: 787 case QETH_LINK_TYPE_LANE_ETH1000: 788 link_info->speed = SPEED_1000; 789 link_info->port = PORT_FIBRE; 790 break; 791 case QETH_LINK_TYPE_10GBIT_ETH: 792 link_info->speed = SPEED_10000; 793 link_info->port = PORT_FIBRE; 794 break; 795 case QETH_LINK_TYPE_25GBIT_ETH: 796 link_info->speed = SPEED_25000; 797 link_info->port = PORT_FIBRE; 798 break; 799 default: 800 dev_info(&card->gdev->dev, 801 "Unknown link type %x\n", 802 card->info.link_type); 803 link_info->speed = SPEED_UNKNOWN; 804 link_info->port = PORT_OTHER; 805 } 806 807 link_info->link_mode = QETH_LINK_MODE_UNKNOWN; 808 } 809 } 810 811 static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card, 812 struct qeth_ipa_cmd *cmd) 813 { 814 QETH_CARD_TEXT(card, 5, "chkipad"); 815 816 if (IS_IPA_REPLY(cmd)) { 817 if (cmd->hdr.command != IPA_CMD_SET_DIAG_ASS) 818 qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card); 819 return cmd; 820 } 821 822 /* handle unsolicited event: */ 823 switch (cmd->hdr.command) { 824 case IPA_CMD_STOPLAN: 825 if (cmd->hdr.return_code == IPA_RC_VEPA_TO_VEB_TRANSITION) { 826 dev_err(&card->gdev->dev, 827 "Adjacent port of interface %s is no longer in reflective relay mode, trigger recovery\n", 828 netdev_name(card->dev)); 829 /* Set offline, then probably fail to set online: */ 830 qeth_schedule_recovery(card); 831 } else { 832 /* stay online for subsequent STARTLAN */ 833 dev_warn(&card->gdev->dev, 834 "The link for interface %s on CHPID 0x%X failed\n", 835 netdev_name(card->dev), card->info.chpid); 836 qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card); 837 netif_carrier_off(card->dev); 838 qeth_default_link_info(card); 839 } 840 return NULL; 841 case IPA_CMD_STARTLAN: 842 dev_info(&card->gdev->dev, 843 "The link for %s on CHPID 0x%X has been restored\n", 844 netdev_name(card->dev), card->info.chpid); 845 if (card->info.hwtrap) 846 card->info.hwtrap = 2; 847 qeth_schedule_recovery(card); 848 return NULL; 849 case IPA_CMD_SETBRIDGEPORT_IQD: 850 case IPA_CMD_SETBRIDGEPORT_OSA: 851 case IPA_CMD_ADDRESS_CHANGE_NOTIF: 852 if (card->discipline->control_event_handler(card, cmd)) 853 return cmd; 854 return NULL; 855 case IPA_CMD_REGISTER_LOCAL_ADDR: 856 if (cmd->hdr.prot_version == QETH_PROT_IPV4) 857 qeth_add_local_addrs4(card, &cmd->data.local_addrs4); 858 else if (cmd->hdr.prot_version == QETH_PROT_IPV6) 859 qeth_add_local_addrs6(card, &cmd->data.local_addrs6); 860 861 QETH_CARD_TEXT(card, 3, "irla"); 862 return NULL; 863 case IPA_CMD_UNREGISTER_LOCAL_ADDR: 864 if (cmd->hdr.prot_version == QETH_PROT_IPV4) 865 qeth_del_local_addrs4(card, &cmd->data.local_addrs4); 866 else if (cmd->hdr.prot_version == QETH_PROT_IPV6) 867 qeth_del_local_addrs6(card, &cmd->data.local_addrs6); 868 869 QETH_CARD_TEXT(card, 3, "urla"); 870 return NULL; 871 default: 872 QETH_DBF_MESSAGE(2, "Received data is IPA but not a reply!\n"); 873 return cmd; 874 } 875 } 876 877 static void qeth_clear_ipacmd_list(struct qeth_card *card) 878 { 879 struct qeth_cmd_buffer *iob; 880 unsigned long flags; 881 882 QETH_CARD_TEXT(card, 4, "clipalst"); 883 884 spin_lock_irqsave(&card->lock, flags); 885 list_for_each_entry(iob, &card->cmd_waiter_list, list_entry) 886 qeth_notify_cmd(iob, -ECANCELED); 887 spin_unlock_irqrestore(&card->lock, flags); 888 } 889 890 static int qeth_check_idx_response(struct qeth_card *card, 891 unsigned char *buffer) 892 { 893 QETH_DBF_HEX(CTRL, 2, buffer, QETH_DBF_CTRL_LEN); 894 if ((buffer[2] & QETH_IDX_TERMINATE_MASK) == QETH_IDX_TERMINATE) { 895 QETH_DBF_MESSAGE(2, "received an IDX TERMINATE with cause code %#04x\n", 896 buffer[4]); 897 QETH_CARD_TEXT(card, 2, "ckidxres"); 898 QETH_CARD_TEXT(card, 2, " idxterm"); 899 QETH_CARD_TEXT_(card, 2, "rc%x", buffer[4]); 900 if (buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT || 901 buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT_VM) { 902 dev_err(&card->gdev->dev, 903 "The device does not support the configured transport mode\n"); 904 return -EPROTONOSUPPORT; 905 } 906 return -EIO; 907 } 908 return 0; 909 } 910 911 static void qeth_release_buffer_cb(struct qeth_card *card, 912 struct qeth_cmd_buffer *iob, 913 unsigned int data_length) 914 { 915 qeth_put_cmd(iob); 916 } 917 918 static void qeth_cancel_cmd(struct qeth_cmd_buffer *iob, int rc) 919 { 920 qeth_notify_cmd(iob, rc); 921 qeth_put_cmd(iob); 922 } 923 924 static struct qeth_cmd_buffer *qeth_alloc_cmd(struct qeth_channel *channel, 925 unsigned int length, 926 unsigned int ccws, long timeout) 927 { 928 struct qeth_cmd_buffer *iob; 929 930 if (length > QETH_BUFSIZE) 931 return NULL; 932 933 iob = kzalloc(sizeof(*iob), GFP_KERNEL); 934 if (!iob) 935 return NULL; 936 937 iob->data = kzalloc(ALIGN(length, 8) + ccws * sizeof(struct ccw1), 938 GFP_KERNEL | GFP_DMA); 939 if (!iob->data) { 940 kfree(iob); 941 return NULL; 942 } 943 944 init_completion(&iob->done); 945 spin_lock_init(&iob->lock); 946 refcount_set(&iob->ref_count, 1); 947 iob->channel = channel; 948 iob->timeout = timeout; 949 iob->length = length; 950 return iob; 951 } 952 953 static void qeth_issue_next_read_cb(struct qeth_card *card, 954 struct qeth_cmd_buffer *iob, 955 unsigned int data_length) 956 { 957 struct qeth_cmd_buffer *request = NULL; 958 struct qeth_ipa_cmd *cmd = NULL; 959 struct qeth_reply *reply = NULL; 960 struct qeth_cmd_buffer *tmp; 961 unsigned long flags; 962 int rc = 0; 963 964 QETH_CARD_TEXT(card, 4, "sndctlcb"); 965 rc = qeth_check_idx_response(card, iob->data); 966 switch (rc) { 967 case 0: 968 break; 969 case -EIO: 970 qeth_schedule_recovery(card); 971 fallthrough; 972 default: 973 qeth_clear_ipacmd_list(card); 974 goto err_idx; 975 } 976 977 cmd = __ipa_reply(iob); 978 if (cmd) { 979 cmd = qeth_check_ipa_data(card, cmd); 980 if (!cmd) 981 goto out; 982 } 983 984 /* match against pending cmd requests */ 985 spin_lock_irqsave(&card->lock, flags); 986 list_for_each_entry(tmp, &card->cmd_waiter_list, list_entry) { 987 if (tmp->match && tmp->match(tmp, iob)) { 988 request = tmp; 989 /* take the object outside the lock */ 990 qeth_get_cmd(request); 991 break; 992 } 993 } 994 spin_unlock_irqrestore(&card->lock, flags); 995 996 if (!request) 997 goto out; 998 999 reply = &request->reply; 1000 if (!reply->callback) { 1001 rc = 0; 1002 goto no_callback; 1003 } 1004 1005 spin_lock_irqsave(&request->lock, flags); 1006 if (request->rc) 1007 /* Bail out when the requestor has already left: */ 1008 rc = request->rc; 1009 else 1010 rc = reply->callback(card, reply, cmd ? (unsigned long)cmd : 1011 (unsigned long)iob); 1012 spin_unlock_irqrestore(&request->lock, flags); 1013 1014 no_callback: 1015 if (rc <= 0) 1016 qeth_notify_cmd(request, rc); 1017 qeth_put_cmd(request); 1018 out: 1019 memcpy(&card->seqno.pdu_hdr_ack, 1020 QETH_PDU_HEADER_SEQ_NO(iob->data), 1021 QETH_SEQ_NO_LENGTH); 1022 __qeth_issue_next_read(card); 1023 err_idx: 1024 qeth_put_cmd(iob); 1025 } 1026 1027 static int qeth_set_thread_start_bit(struct qeth_card *card, 1028 unsigned long thread) 1029 { 1030 unsigned long flags; 1031 int rc = 0; 1032 1033 spin_lock_irqsave(&card->thread_mask_lock, flags); 1034 if (!(card->thread_allowed_mask & thread)) 1035 rc = -EPERM; 1036 else if (card->thread_start_mask & thread) 1037 rc = -EBUSY; 1038 else 1039 card->thread_start_mask |= thread; 1040 spin_unlock_irqrestore(&card->thread_mask_lock, flags); 1041 1042 return rc; 1043 } 1044 1045 static void qeth_clear_thread_start_bit(struct qeth_card *card, 1046 unsigned long thread) 1047 { 1048 unsigned long flags; 1049 1050 spin_lock_irqsave(&card->thread_mask_lock, flags); 1051 card->thread_start_mask &= ~thread; 1052 spin_unlock_irqrestore(&card->thread_mask_lock, flags); 1053 wake_up(&card->wait_q); 1054 } 1055 1056 static void qeth_clear_thread_running_bit(struct qeth_card *card, 1057 unsigned long thread) 1058 { 1059 unsigned long flags; 1060 1061 spin_lock_irqsave(&card->thread_mask_lock, flags); 1062 card->thread_running_mask &= ~thread; 1063 spin_unlock_irqrestore(&card->thread_mask_lock, flags); 1064 wake_up_all(&card->wait_q); 1065 } 1066 1067 static int __qeth_do_run_thread(struct qeth_card *card, unsigned long thread) 1068 { 1069 unsigned long flags; 1070 int rc = 0; 1071 1072 spin_lock_irqsave(&card->thread_mask_lock, flags); 1073 if (card->thread_start_mask & thread) { 1074 if ((card->thread_allowed_mask & thread) && 1075 !(card->thread_running_mask & thread)) { 1076 rc = 1; 1077 card->thread_start_mask &= ~thread; 1078 card->thread_running_mask |= thread; 1079 } else 1080 rc = -EPERM; 1081 } 1082 spin_unlock_irqrestore(&card->thread_mask_lock, flags); 1083 return rc; 1084 } 1085 1086 static int qeth_do_run_thread(struct qeth_card *card, unsigned long thread) 1087 { 1088 int rc = 0; 1089 1090 wait_event(card->wait_q, 1091 (rc = __qeth_do_run_thread(card, thread)) >= 0); 1092 return rc; 1093 } 1094 1095 int qeth_schedule_recovery(struct qeth_card *card) 1096 { 1097 int rc; 1098 1099 QETH_CARD_TEXT(card, 2, "startrec"); 1100 1101 rc = qeth_set_thread_start_bit(card, QETH_RECOVER_THREAD); 1102 if (!rc) 1103 schedule_work(&card->kernel_thread_starter); 1104 1105 return rc; 1106 } 1107 1108 static int qeth_get_problem(struct qeth_card *card, struct ccw_device *cdev, 1109 struct irb *irb) 1110 { 1111 int dstat, cstat; 1112 char *sense; 1113 1114 sense = (char *) irb->ecw; 1115 cstat = irb->scsw.cmd.cstat; 1116 dstat = irb->scsw.cmd.dstat; 1117 1118 if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK | 1119 SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK | 1120 SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) { 1121 QETH_CARD_TEXT(card, 2, "CGENCHK"); 1122 dev_warn(&cdev->dev, "The qeth device driver " 1123 "failed to recover an error on the device\n"); 1124 QETH_DBF_MESSAGE(2, "check on channel %x with dstat=%#x, cstat=%#x\n", 1125 CCW_DEVID(cdev), dstat, cstat); 1126 print_hex_dump(KERN_WARNING, "qeth: irb ", DUMP_PREFIX_OFFSET, 1127 16, 1, irb, 64, 1); 1128 return -EIO; 1129 } 1130 1131 if (dstat & DEV_STAT_UNIT_CHECK) { 1132 if (sense[SENSE_RESETTING_EVENT_BYTE] & 1133 SENSE_RESETTING_EVENT_FLAG) { 1134 QETH_CARD_TEXT(card, 2, "REVIND"); 1135 return -EIO; 1136 } 1137 if (sense[SENSE_COMMAND_REJECT_BYTE] & 1138 SENSE_COMMAND_REJECT_FLAG) { 1139 QETH_CARD_TEXT(card, 2, "CMDREJi"); 1140 return -EIO; 1141 } 1142 if ((sense[2] == 0xaf) && (sense[3] == 0xfe)) { 1143 QETH_CARD_TEXT(card, 2, "AFFE"); 1144 return -EIO; 1145 } 1146 if ((!sense[0]) && (!sense[1]) && (!sense[2]) && (!sense[3])) { 1147 QETH_CARD_TEXT(card, 2, "ZEROSEN"); 1148 return 0; 1149 } 1150 QETH_CARD_TEXT(card, 2, "DGENCHK"); 1151 return -EIO; 1152 } 1153 return 0; 1154 } 1155 1156 static int qeth_check_irb_error(struct qeth_card *card, struct ccw_device *cdev, 1157 struct irb *irb) 1158 { 1159 if (!IS_ERR(irb)) 1160 return 0; 1161 1162 switch (PTR_ERR(irb)) { 1163 case -EIO: 1164 QETH_DBF_MESSAGE(2, "i/o-error on channel %x\n", 1165 CCW_DEVID(cdev)); 1166 QETH_CARD_TEXT(card, 2, "ckirberr"); 1167 QETH_CARD_TEXT_(card, 2, " rc%d", -EIO); 1168 return -EIO; 1169 case -ETIMEDOUT: 1170 dev_warn(&cdev->dev, "A hardware operation timed out" 1171 " on the device\n"); 1172 QETH_CARD_TEXT(card, 2, "ckirberr"); 1173 QETH_CARD_TEXT_(card, 2, " rc%d", -ETIMEDOUT); 1174 return -ETIMEDOUT; 1175 default: 1176 QETH_DBF_MESSAGE(2, "unknown error %ld on channel %x\n", 1177 PTR_ERR(irb), CCW_DEVID(cdev)); 1178 QETH_CARD_TEXT(card, 2, "ckirberr"); 1179 QETH_CARD_TEXT(card, 2, " rc???"); 1180 return PTR_ERR(irb); 1181 } 1182 } 1183 1184 /** 1185 * qeth_irq() - qeth interrupt handler 1186 * @cdev: ccw device 1187 * @intparm: expect pointer to iob 1188 * @irb: Interruption Response Block 1189 * 1190 * In the good path: 1191 * corresponding qeth channel is locked with last used iob as active_cmd. 1192 * But this function is also called for error interrupts. 1193 * 1194 * Caller ensures that: 1195 * Interrupts are disabled; ccw device lock is held; 1196 * 1197 */ 1198 static void qeth_irq(struct ccw_device *cdev, unsigned long intparm, 1199 struct irb *irb) 1200 { 1201 int rc; 1202 int cstat, dstat; 1203 struct qeth_cmd_buffer *iob = NULL; 1204 struct ccwgroup_device *gdev; 1205 struct qeth_channel *channel; 1206 struct qeth_card *card; 1207 1208 /* while we hold the ccwdev lock, this stays valid: */ 1209 gdev = dev_get_drvdata(&cdev->dev); 1210 card = dev_get_drvdata(&gdev->dev); 1211 1212 QETH_CARD_TEXT(card, 5, "irq"); 1213 1214 if (card->read.ccwdev == cdev) { 1215 channel = &card->read; 1216 QETH_CARD_TEXT(card, 5, "read"); 1217 } else if (card->write.ccwdev == cdev) { 1218 channel = &card->write; 1219 QETH_CARD_TEXT(card, 5, "write"); 1220 } else { 1221 channel = &card->data; 1222 QETH_CARD_TEXT(card, 5, "data"); 1223 } 1224 1225 if (intparm == 0) { 1226 QETH_CARD_TEXT(card, 5, "irqunsol"); 1227 } else if ((addr_t)intparm != (addr_t)channel->active_cmd) { 1228 QETH_CARD_TEXT(card, 5, "irqunexp"); 1229 1230 dev_err(&cdev->dev, 1231 "Received IRQ with intparm %lx, expected %px\n", 1232 intparm, channel->active_cmd); 1233 if (channel->active_cmd) 1234 qeth_cancel_cmd(channel->active_cmd, -EIO); 1235 } else { 1236 iob = (struct qeth_cmd_buffer *) (addr_t)intparm; 1237 } 1238 1239 rc = qeth_check_irb_error(card, cdev, irb); 1240 if (rc) { 1241 /* IO was terminated, free its resources. */ 1242 qeth_unlock_channel(card, channel); 1243 if (iob) 1244 qeth_cancel_cmd(iob, rc); 1245 return; 1246 } 1247 1248 if (irb->scsw.cmd.fctl & SCSW_FCTL_CLEAR_FUNC) { 1249 channel->state = CH_STATE_STOPPED; 1250 wake_up(&card->wait_q); 1251 } 1252 1253 if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) { 1254 channel->state = CH_STATE_HALTED; 1255 wake_up(&card->wait_q); 1256 } 1257 1258 if (iob && (irb->scsw.cmd.fctl & (SCSW_FCTL_CLEAR_FUNC | 1259 SCSW_FCTL_HALT_FUNC))) { 1260 qeth_cancel_cmd(iob, -ECANCELED); 1261 iob = NULL; 1262 } 1263 1264 cstat = irb->scsw.cmd.cstat; 1265 dstat = irb->scsw.cmd.dstat; 1266 1267 if ((dstat & DEV_STAT_UNIT_EXCEP) || 1268 (dstat & DEV_STAT_UNIT_CHECK) || 1269 (cstat)) { 1270 if (irb->esw.esw0.erw.cons) { 1271 dev_warn(&channel->ccwdev->dev, 1272 "The qeth device driver failed to recover " 1273 "an error on the device\n"); 1274 QETH_DBF_MESSAGE(2, "sense data available on channel %x: cstat %#X dstat %#X\n", 1275 CCW_DEVID(channel->ccwdev), cstat, 1276 dstat); 1277 print_hex_dump(KERN_WARNING, "qeth: irb ", 1278 DUMP_PREFIX_OFFSET, 16, 1, irb, 32, 1); 1279 print_hex_dump(KERN_WARNING, "qeth: sense data ", 1280 DUMP_PREFIX_OFFSET, 16, 1, irb->ecw, 32, 1); 1281 } 1282 1283 rc = qeth_get_problem(card, cdev, irb); 1284 if (rc) { 1285 card->read_or_write_problem = 1; 1286 qeth_unlock_channel(card, channel); 1287 if (iob) 1288 qeth_cancel_cmd(iob, rc); 1289 qeth_clear_ipacmd_list(card); 1290 qeth_schedule_recovery(card); 1291 return; 1292 } 1293 } 1294 1295 if (scsw_cmd_is_valid_cc(&irb->scsw) && irb->scsw.cmd.cc == 1 && iob) { 1296 /* channel command hasn't started: retry. 1297 * active_cmd is still set to last iob 1298 */ 1299 QETH_CARD_TEXT(card, 2, "irqcc1"); 1300 rc = ccw_device_start_timeout(cdev, __ccw_from_cmd(iob), 1301 (addr_t)iob, 0, 0, iob->timeout); 1302 if (rc) { 1303 QETH_DBF_MESSAGE(2, 1304 "ccw retry on %x failed, rc = %i\n", 1305 CARD_DEVID(card), rc); 1306 QETH_CARD_TEXT_(card, 2, " err%d", rc); 1307 qeth_unlock_channel(card, channel); 1308 qeth_cancel_cmd(iob, rc); 1309 } 1310 return; 1311 } 1312 1313 qeth_unlock_channel(card, channel); 1314 1315 if (iob) { 1316 /* sanity check: */ 1317 if (irb->scsw.cmd.count > iob->length) { 1318 qeth_cancel_cmd(iob, -EIO); 1319 return; 1320 } 1321 if (iob->callback) 1322 iob->callback(card, iob, 1323 iob->length - irb->scsw.cmd.count); 1324 } 1325 } 1326 1327 static void qeth_notify_skbs(struct qeth_qdio_out_q *q, 1328 struct qeth_qdio_out_buffer *buf, 1329 enum iucv_tx_notify notification) 1330 { 1331 struct sk_buff *skb; 1332 1333 skb_queue_walk(&buf->skb_list, skb) { 1334 struct sock *sk = skb->sk; 1335 1336 QETH_CARD_TEXT_(q->card, 5, "skbn%d", notification); 1337 QETH_CARD_TEXT_(q->card, 5, "%lx", (long) skb); 1338 if (sk && sk->sk_family == PF_IUCV) 1339 iucv_sk(sk)->sk_txnotify(sk, notification); 1340 } 1341 } 1342 1343 static void qeth_tx_complete_buf(struct qeth_qdio_out_q *queue, 1344 struct qeth_qdio_out_buffer *buf, bool error, 1345 int budget) 1346 { 1347 struct sk_buff *skb; 1348 1349 /* Empty buffer? */ 1350 if (buf->next_element_to_fill == 0) 1351 return; 1352 1353 QETH_TXQ_STAT_INC(queue, bufs); 1354 QETH_TXQ_STAT_ADD(queue, buf_elements, buf->next_element_to_fill); 1355 if (error) { 1356 QETH_TXQ_STAT_ADD(queue, tx_errors, buf->frames); 1357 } else { 1358 QETH_TXQ_STAT_ADD(queue, tx_packets, buf->frames); 1359 QETH_TXQ_STAT_ADD(queue, tx_bytes, buf->bytes); 1360 } 1361 1362 while ((skb = __skb_dequeue(&buf->skb_list)) != NULL) { 1363 unsigned int bytes = qdisc_pkt_len(skb); 1364 bool is_tso = skb_is_gso(skb); 1365 unsigned int packets; 1366 1367 packets = is_tso ? skb_shinfo(skb)->gso_segs : 1; 1368 if (!error) { 1369 if (skb->ip_summed == CHECKSUM_PARTIAL) 1370 QETH_TXQ_STAT_ADD(queue, skbs_csum, packets); 1371 if (skb_is_nonlinear(skb)) 1372 QETH_TXQ_STAT_INC(queue, skbs_sg); 1373 if (is_tso) { 1374 QETH_TXQ_STAT_INC(queue, skbs_tso); 1375 QETH_TXQ_STAT_ADD(queue, tso_bytes, bytes); 1376 } 1377 } 1378 1379 napi_consume_skb(skb, budget); 1380 } 1381 } 1382 1383 static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue, 1384 struct qeth_qdio_out_buffer *buf, 1385 bool error, int budget) 1386 { 1387 int i; 1388 1389 /* is PCI flag set on buffer? */ 1390 if (buf->buffer->element[0].sflags & SBAL_SFLAGS0_PCI_REQ) { 1391 atomic_dec(&queue->set_pci_flags_count); 1392 QETH_TXQ_STAT_INC(queue, completion_irq); 1393 } 1394 1395 qeth_tx_complete_buf(queue, buf, error, budget); 1396 1397 for (i = 0; i < queue->max_elements; ++i) { 1398 void *data = dma64_to_virt(buf->buffer->element[i].addr); 1399 1400 if (__test_and_clear_bit(i, buf->from_kmem_cache) && data) 1401 kmem_cache_free(qeth_core_header_cache, data); 1402 } 1403 1404 qeth_scrub_qdio_buffer(buf->buffer, queue->max_elements); 1405 buf->next_element_to_fill = 0; 1406 buf->frames = 0; 1407 buf->bytes = 0; 1408 atomic_set(&buf->state, QETH_QDIO_BUF_EMPTY); 1409 } 1410 1411 static void qeth_free_out_buf(struct qeth_qdio_out_buffer *buf) 1412 { 1413 if (buf->aob) 1414 kmem_cache_free(qeth_qaob_cache, buf->aob); 1415 kmem_cache_free(qeth_qdio_outbuf_cache, buf); 1416 } 1417 1418 static void qeth_tx_complete_pending_bufs(struct qeth_card *card, 1419 struct qeth_qdio_out_q *queue, 1420 bool drain, int budget) 1421 { 1422 struct qeth_qdio_out_buffer *buf, *tmp; 1423 1424 list_for_each_entry_safe(buf, tmp, &queue->pending_bufs, list_entry) { 1425 struct qeth_qaob_priv1 *priv; 1426 struct qaob *aob = buf->aob; 1427 enum iucv_tx_notify notify; 1428 unsigned int i; 1429 1430 priv = (struct qeth_qaob_priv1 *)&aob->user1; 1431 if (drain || READ_ONCE(priv->state) == QETH_QAOB_DONE) { 1432 QETH_CARD_TEXT(card, 5, "fp"); 1433 QETH_CARD_TEXT_(card, 5, "%lx", (long) buf); 1434 1435 notify = drain ? TX_NOTIFY_GENERALERROR : 1436 qeth_compute_cq_notification(aob->aorc, 1); 1437 qeth_notify_skbs(queue, buf, notify); 1438 qeth_tx_complete_buf(queue, buf, drain, budget); 1439 1440 for (i = 0; 1441 i < aob->sb_count && i < queue->max_elements; 1442 i++) { 1443 void *data = dma64_to_virt(aob->sba[i]); 1444 1445 if (test_bit(i, buf->from_kmem_cache) && data) 1446 kmem_cache_free(qeth_core_header_cache, 1447 data); 1448 } 1449 1450 list_del(&buf->list_entry); 1451 qeth_free_out_buf(buf); 1452 } 1453 } 1454 } 1455 1456 static void qeth_drain_output_queue(struct qeth_qdio_out_q *q, bool free) 1457 { 1458 int j; 1459 1460 qeth_tx_complete_pending_bufs(q->card, q, true, 0); 1461 1462 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) { 1463 if (!q->bufs[j]) 1464 continue; 1465 1466 qeth_clear_output_buffer(q, q->bufs[j], true, 0); 1467 if (free) { 1468 qeth_free_out_buf(q->bufs[j]); 1469 q->bufs[j] = NULL; 1470 } 1471 } 1472 } 1473 1474 static void qeth_drain_output_queues(struct qeth_card *card) 1475 { 1476 int i; 1477 1478 QETH_CARD_TEXT(card, 2, "clearqdbf"); 1479 /* clear outbound buffers to free skbs */ 1480 for (i = 0; i < card->qdio.no_out_queues; ++i) { 1481 if (card->qdio.out_qs[i]) 1482 qeth_drain_output_queue(card->qdio.out_qs[i], false); 1483 } 1484 } 1485 1486 static void qeth_osa_set_output_queues(struct qeth_card *card, bool single) 1487 { 1488 unsigned int max = single ? 1 : card->dev->num_tx_queues; 1489 1490 if (card->qdio.no_out_queues == max) 1491 return; 1492 1493 if (atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED) 1494 qeth_free_qdio_queues(card); 1495 1496 if (max == 1 && card->qdio.do_prio_queueing != QETH_PRIOQ_DEFAULT) 1497 dev_info(&card->gdev->dev, "Priority Queueing not supported\n"); 1498 1499 card->qdio.no_out_queues = max; 1500 } 1501 1502 static int qeth_update_from_chp_desc(struct qeth_card *card) 1503 { 1504 struct ccw_device *ccwdev; 1505 struct channel_path_desc_fmt0 *chp_dsc; 1506 1507 QETH_CARD_TEXT(card, 2, "chp_desc"); 1508 1509 ccwdev = card->data.ccwdev; 1510 chp_dsc = ccw_device_get_chp_desc(ccwdev, 0); 1511 if (!chp_dsc) 1512 return -ENOMEM; 1513 1514 card->info.func_level = 0x4100 + chp_dsc->desc; 1515 1516 if (IS_OSD(card) || IS_OSX(card)) 1517 /* CHPP field bit 6 == 1 -> single queue */ 1518 qeth_osa_set_output_queues(card, chp_dsc->chpp & 0x02); 1519 1520 kfree(chp_dsc); 1521 QETH_CARD_TEXT_(card, 2, "nr:%x", card->qdio.no_out_queues); 1522 QETH_CARD_TEXT_(card, 2, "lvl:%02x", card->info.func_level); 1523 return 0; 1524 } 1525 1526 static void qeth_init_qdio_info(struct qeth_card *card) 1527 { 1528 QETH_CARD_TEXT(card, 4, "intqdinf"); 1529 atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED); 1530 card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT; 1531 card->qdio.default_out_queue = QETH_DEFAULT_QUEUE; 1532 1533 /* inbound */ 1534 card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT; 1535 if (IS_IQD(card)) 1536 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_HSDEFAULT; 1537 else 1538 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_DEFAULT; 1539 card->qdio.in_buf_pool.buf_count = card->qdio.init_pool.buf_count; 1540 INIT_LIST_HEAD(&card->qdio.in_buf_pool.entry_list); 1541 INIT_LIST_HEAD(&card->qdio.init_pool.entry_list); 1542 } 1543 1544 static void qeth_set_initial_options(struct qeth_card *card) 1545 { 1546 card->options.route4.type = NO_ROUTER; 1547 card->options.route6.type = NO_ROUTER; 1548 card->options.isolation = ISOLATION_MODE_NONE; 1549 card->options.cq = QETH_CQ_DISABLED; 1550 card->options.layer = QETH_DISCIPLINE_UNDETERMINED; 1551 } 1552 1553 static int qeth_do_start_thread(struct qeth_card *card, unsigned long thread) 1554 { 1555 unsigned long flags; 1556 int rc = 0; 1557 1558 spin_lock_irqsave(&card->thread_mask_lock, flags); 1559 QETH_CARD_TEXT_(card, 4, " %02x%02x%02x", 1560 (u8) card->thread_start_mask, 1561 (u8) card->thread_allowed_mask, 1562 (u8) card->thread_running_mask); 1563 rc = (card->thread_start_mask & thread); 1564 spin_unlock_irqrestore(&card->thread_mask_lock, flags); 1565 return rc; 1566 } 1567 1568 static int qeth_do_reset(void *data); 1569 static void qeth_start_kernel_thread(struct work_struct *work) 1570 { 1571 struct task_struct *ts; 1572 struct qeth_card *card = container_of(work, struct qeth_card, 1573 kernel_thread_starter); 1574 QETH_CARD_TEXT(card, 2, "strthrd"); 1575 1576 if (card->read.state != CH_STATE_UP && 1577 card->write.state != CH_STATE_UP) 1578 return; 1579 if (qeth_do_start_thread(card, QETH_RECOVER_THREAD)) { 1580 ts = kthread_run(qeth_do_reset, card, "qeth_recover"); 1581 if (IS_ERR(ts)) { 1582 qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD); 1583 qeth_clear_thread_running_bit(card, 1584 QETH_RECOVER_THREAD); 1585 } 1586 } 1587 } 1588 1589 static void qeth_buffer_reclaim_work(struct work_struct *); 1590 static void qeth_setup_card(struct qeth_card *card) 1591 { 1592 QETH_CARD_TEXT(card, 2, "setupcrd"); 1593 1594 card->info.type = CARD_RDEV(card)->id.driver_info; 1595 card->state = CARD_STATE_DOWN; 1596 spin_lock_init(&card->lock); 1597 spin_lock_init(&card->thread_mask_lock); 1598 mutex_init(&card->conf_mutex); 1599 mutex_init(&card->discipline_mutex); 1600 INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread); 1601 INIT_LIST_HEAD(&card->cmd_waiter_list); 1602 init_waitqueue_head(&card->wait_q); 1603 qeth_set_initial_options(card); 1604 /* IP address takeover */ 1605 INIT_LIST_HEAD(&card->ipato.entries); 1606 qeth_init_qdio_info(card); 1607 INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work); 1608 hash_init(card->rx_mode_addrs); 1609 hash_init(card->local_addrs4); 1610 hash_init(card->local_addrs6); 1611 spin_lock_init(&card->local_addrs4_lock); 1612 spin_lock_init(&card->local_addrs6_lock); 1613 } 1614 1615 static void qeth_core_sl_print(struct seq_file *m, struct service_level *slr) 1616 { 1617 struct qeth_card *card = container_of(slr, struct qeth_card, 1618 qeth_service_level); 1619 if (card->info.mcl_level[0]) 1620 seq_printf(m, "qeth: %s firmware level %s\n", 1621 CARD_BUS_ID(card), card->info.mcl_level); 1622 } 1623 1624 static struct qeth_card *qeth_alloc_card(struct ccwgroup_device *gdev) 1625 { 1626 struct qeth_card *card; 1627 1628 QETH_DBF_TEXT(SETUP, 2, "alloccrd"); 1629 card = kzalloc(sizeof(*card), GFP_KERNEL); 1630 if (!card) 1631 goto out; 1632 QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *)); 1633 1634 card->gdev = gdev; 1635 dev_set_drvdata(&gdev->dev, card); 1636 CARD_RDEV(card) = gdev->cdev[0]; 1637 CARD_WDEV(card) = gdev->cdev[1]; 1638 CARD_DDEV(card) = gdev->cdev[2]; 1639 1640 card->event_wq = alloc_ordered_workqueue("%s_event", 0, 1641 dev_name(&gdev->dev)); 1642 if (!card->event_wq) 1643 goto out_wq; 1644 1645 card->read_cmd = qeth_alloc_cmd(&card->read, QETH_BUFSIZE, 1, 0); 1646 if (!card->read_cmd) 1647 goto out_read_cmd; 1648 1649 card->debugfs = debugfs_create_dir(dev_name(&gdev->dev), 1650 qeth_debugfs_root); 1651 debugfs_create_file("local_addrs", 0400, card->debugfs, card, 1652 &qeth_debugfs_local_addr_fops); 1653 1654 card->qeth_service_level.seq_print = qeth_core_sl_print; 1655 register_service_level(&card->qeth_service_level); 1656 return card; 1657 1658 out_read_cmd: 1659 destroy_workqueue(card->event_wq); 1660 out_wq: 1661 dev_set_drvdata(&gdev->dev, NULL); 1662 kfree(card); 1663 out: 1664 return NULL; 1665 } 1666 1667 static int qeth_clear_channel(struct qeth_card *card, 1668 struct qeth_channel *channel) 1669 { 1670 int rc; 1671 1672 QETH_CARD_TEXT(card, 3, "clearch"); 1673 spin_lock_irq(get_ccwdev_lock(channel->ccwdev)); 1674 rc = ccw_device_clear(channel->ccwdev, (addr_t)channel->active_cmd); 1675 spin_unlock_irq(get_ccwdev_lock(channel->ccwdev)); 1676 1677 if (rc) 1678 return rc; 1679 rc = wait_event_interruptible_timeout(card->wait_q, 1680 channel->state == CH_STATE_STOPPED, QETH_TIMEOUT); 1681 if (rc == -ERESTARTSYS) 1682 return rc; 1683 if (channel->state != CH_STATE_STOPPED) 1684 return -ETIME; 1685 channel->state = CH_STATE_DOWN; 1686 return 0; 1687 } 1688 1689 static int qeth_halt_channel(struct qeth_card *card, 1690 struct qeth_channel *channel) 1691 { 1692 int rc; 1693 1694 QETH_CARD_TEXT(card, 3, "haltch"); 1695 spin_lock_irq(get_ccwdev_lock(channel->ccwdev)); 1696 rc = ccw_device_halt(channel->ccwdev, (addr_t)channel->active_cmd); 1697 spin_unlock_irq(get_ccwdev_lock(channel->ccwdev)); 1698 1699 if (rc) 1700 return rc; 1701 rc = wait_event_interruptible_timeout(card->wait_q, 1702 channel->state == CH_STATE_HALTED, QETH_TIMEOUT); 1703 if (rc == -ERESTARTSYS) 1704 return rc; 1705 if (channel->state != CH_STATE_HALTED) 1706 return -ETIME; 1707 return 0; 1708 } 1709 1710 static int qeth_stop_channel(struct qeth_channel *channel) 1711 { 1712 struct ccw_device *cdev = channel->ccwdev; 1713 int rc; 1714 1715 rc = ccw_device_set_offline(cdev); 1716 1717 spin_lock_irq(get_ccwdev_lock(cdev)); 1718 if (channel->active_cmd) 1719 dev_err(&cdev->dev, "Stopped channel while cmd %px was still active\n", 1720 channel->active_cmd); 1721 1722 cdev->handler = NULL; 1723 spin_unlock_irq(get_ccwdev_lock(cdev)); 1724 1725 return rc; 1726 } 1727 1728 static int qeth_start_channel(struct qeth_channel *channel) 1729 { 1730 struct ccw_device *cdev = channel->ccwdev; 1731 int rc; 1732 1733 channel->state = CH_STATE_DOWN; 1734 xchg(&channel->active_cmd, NULL); 1735 1736 spin_lock_irq(get_ccwdev_lock(cdev)); 1737 cdev->handler = qeth_irq; 1738 spin_unlock_irq(get_ccwdev_lock(cdev)); 1739 1740 rc = ccw_device_set_online(cdev); 1741 if (rc) 1742 goto err; 1743 1744 return 0; 1745 1746 err: 1747 spin_lock_irq(get_ccwdev_lock(cdev)); 1748 cdev->handler = NULL; 1749 spin_unlock_irq(get_ccwdev_lock(cdev)); 1750 return rc; 1751 } 1752 1753 static int qeth_halt_channels(struct qeth_card *card) 1754 { 1755 int rc1 = 0, rc2 = 0, rc3 = 0; 1756 1757 QETH_CARD_TEXT(card, 3, "haltchs"); 1758 rc1 = qeth_halt_channel(card, &card->read); 1759 rc2 = qeth_halt_channel(card, &card->write); 1760 rc3 = qeth_halt_channel(card, &card->data); 1761 if (rc1) 1762 return rc1; 1763 if (rc2) 1764 return rc2; 1765 return rc3; 1766 } 1767 1768 static int qeth_clear_channels(struct qeth_card *card) 1769 { 1770 int rc1 = 0, rc2 = 0, rc3 = 0; 1771 1772 QETH_CARD_TEXT(card, 3, "clearchs"); 1773 rc1 = qeth_clear_channel(card, &card->read); 1774 rc2 = qeth_clear_channel(card, &card->write); 1775 rc3 = qeth_clear_channel(card, &card->data); 1776 if (rc1) 1777 return rc1; 1778 if (rc2) 1779 return rc2; 1780 return rc3; 1781 } 1782 1783 static int qeth_clear_halt_card(struct qeth_card *card, int halt) 1784 { 1785 int rc = 0; 1786 1787 QETH_CARD_TEXT(card, 3, "clhacrd"); 1788 1789 if (halt) 1790 rc = qeth_halt_channels(card); 1791 if (rc) 1792 return rc; 1793 return qeth_clear_channels(card); 1794 } 1795 1796 static int qeth_qdio_clear_card(struct qeth_card *card, int use_halt) 1797 { 1798 int rc = 0; 1799 1800 QETH_CARD_TEXT(card, 3, "qdioclr"); 1801 switch (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ESTABLISHED, 1802 QETH_QDIO_CLEANING)) { 1803 case QETH_QDIO_ESTABLISHED: 1804 if (IS_IQD(card)) 1805 rc = qdio_shutdown(CARD_DDEV(card), 1806 QDIO_FLAG_CLEANUP_USING_HALT); 1807 else 1808 rc = qdio_shutdown(CARD_DDEV(card), 1809 QDIO_FLAG_CLEANUP_USING_CLEAR); 1810 if (rc) 1811 QETH_CARD_TEXT_(card, 3, "1err%d", rc); 1812 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED); 1813 break; 1814 case QETH_QDIO_CLEANING: 1815 return rc; 1816 default: 1817 break; 1818 } 1819 rc = qeth_clear_halt_card(card, use_halt); 1820 if (rc) 1821 QETH_CARD_TEXT_(card, 3, "2err%d", rc); 1822 return rc; 1823 } 1824 1825 static enum qeth_discipline_id qeth_vm_detect_layer(struct qeth_card *card) 1826 { 1827 enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED; 1828 struct diag26c_vnic_resp *response = NULL; 1829 struct diag26c_vnic_req *request = NULL; 1830 struct ccw_dev_id id; 1831 char userid[80]; 1832 int rc = 0; 1833 1834 QETH_CARD_TEXT(card, 2, "vmlayer"); 1835 1836 cpcmd("QUERY USERID", userid, sizeof(userid), &rc); 1837 if (rc) 1838 goto out; 1839 1840 request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA); 1841 response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA); 1842 if (!request || !response) { 1843 rc = -ENOMEM; 1844 goto out; 1845 } 1846 1847 ccw_device_get_id(CARD_RDEV(card), &id); 1848 request->resp_buf_len = sizeof(*response); 1849 request->resp_version = DIAG26C_VERSION6_VM65918; 1850 request->req_format = DIAG26C_VNIC_INFO; 1851 ASCEBC(userid, 8); 1852 memcpy(&request->sys_name, userid, 8); 1853 request->devno = id.devno; 1854 1855 QETH_DBF_HEX(CTRL, 2, request, sizeof(*request)); 1856 rc = diag26c(request, response, DIAG26C_PORT_VNIC); 1857 QETH_DBF_HEX(CTRL, 2, request, sizeof(*request)); 1858 if (rc) 1859 goto out; 1860 QETH_DBF_HEX(CTRL, 2, response, sizeof(*response)); 1861 1862 if (request->resp_buf_len < sizeof(*response) || 1863 response->version != request->resp_version) { 1864 rc = -EIO; 1865 goto out; 1866 } 1867 1868 if (response->protocol == VNIC_INFO_PROT_L2) 1869 disc = QETH_DISCIPLINE_LAYER2; 1870 else if (response->protocol == VNIC_INFO_PROT_L3) 1871 disc = QETH_DISCIPLINE_LAYER3; 1872 1873 out: 1874 kfree(response); 1875 kfree(request); 1876 if (rc) 1877 QETH_CARD_TEXT_(card, 2, "err%x", rc); 1878 return disc; 1879 } 1880 1881 /* Determine whether the device requires a specific layer discipline */ 1882 static enum qeth_discipline_id qeth_enforce_discipline(struct qeth_card *card) 1883 { 1884 enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED; 1885 1886 if (IS_OSM(card)) 1887 disc = QETH_DISCIPLINE_LAYER2; 1888 else if (IS_VM_NIC(card)) 1889 disc = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 : 1890 qeth_vm_detect_layer(card); 1891 1892 switch (disc) { 1893 case QETH_DISCIPLINE_LAYER2: 1894 QETH_CARD_TEXT(card, 3, "force l2"); 1895 break; 1896 case QETH_DISCIPLINE_LAYER3: 1897 QETH_CARD_TEXT(card, 3, "force l3"); 1898 break; 1899 default: 1900 QETH_CARD_TEXT(card, 3, "force no"); 1901 } 1902 1903 return disc; 1904 } 1905 1906 static void qeth_set_blkt_defaults(struct qeth_card *card) 1907 { 1908 QETH_CARD_TEXT(card, 2, "cfgblkt"); 1909 1910 if (card->info.use_v1_blkt) { 1911 card->info.blkt.time_total = 0; 1912 card->info.blkt.inter_packet = 0; 1913 card->info.blkt.inter_packet_jumbo = 0; 1914 } else { 1915 card->info.blkt.time_total = 250; 1916 card->info.blkt.inter_packet = 5; 1917 card->info.blkt.inter_packet_jumbo = 15; 1918 } 1919 } 1920 1921 static void qeth_idx_init(struct qeth_card *card) 1922 { 1923 memset(&card->seqno, 0, sizeof(card->seqno)); 1924 1925 card->token.issuer_rm_w = 0x00010103UL; 1926 card->token.cm_filter_w = 0x00010108UL; 1927 card->token.cm_connection_w = 0x0001010aUL; 1928 card->token.ulp_filter_w = 0x0001010bUL; 1929 card->token.ulp_connection_w = 0x0001010dUL; 1930 1931 switch (card->info.type) { 1932 case QETH_CARD_TYPE_IQD: 1933 card->info.func_level = QETH_IDX_FUNC_LEVEL_IQD; 1934 break; 1935 case QETH_CARD_TYPE_OSD: 1936 card->info.func_level = QETH_IDX_FUNC_LEVEL_OSD; 1937 break; 1938 default: 1939 break; 1940 } 1941 } 1942 1943 static void qeth_idx_finalize_cmd(struct qeth_card *card, 1944 struct qeth_cmd_buffer *iob) 1945 { 1946 memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data), &card->seqno.trans_hdr, 1947 QETH_SEQ_NO_LENGTH); 1948 if (iob->channel == &card->write) 1949 card->seqno.trans_hdr++; 1950 } 1951 1952 static int qeth_peer_func_level(int level) 1953 { 1954 if ((level & 0xff) == 8) 1955 return (level & 0xff) + 0x400; 1956 if (((level >> 8) & 3) == 1) 1957 return (level & 0xff) + 0x200; 1958 return level; 1959 } 1960 1961 static void qeth_mpc_finalize_cmd(struct qeth_card *card, 1962 struct qeth_cmd_buffer *iob) 1963 { 1964 qeth_idx_finalize_cmd(card, iob); 1965 1966 memcpy(QETH_PDU_HEADER_SEQ_NO(iob->data), 1967 &card->seqno.pdu_hdr, QETH_SEQ_NO_LENGTH); 1968 card->seqno.pdu_hdr++; 1969 memcpy(QETH_PDU_HEADER_ACK_SEQ_NO(iob->data), 1970 &card->seqno.pdu_hdr_ack, QETH_SEQ_NO_LENGTH); 1971 1972 iob->callback = qeth_release_buffer_cb; 1973 } 1974 1975 static bool qeth_mpc_match_reply(struct qeth_cmd_buffer *iob, 1976 struct qeth_cmd_buffer *reply) 1977 { 1978 /* MPC cmds are issued strictly in sequence. */ 1979 return !IS_IPA(reply->data); 1980 } 1981 1982 static struct qeth_cmd_buffer *qeth_mpc_alloc_cmd(struct qeth_card *card, 1983 const void *data, 1984 unsigned int data_length) 1985 { 1986 struct qeth_cmd_buffer *iob; 1987 1988 iob = qeth_alloc_cmd(&card->write, data_length, 1, QETH_TIMEOUT); 1989 if (!iob) 1990 return NULL; 1991 1992 memcpy(iob->data, data, data_length); 1993 qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, data_length, 1994 iob->data); 1995 iob->finalize = qeth_mpc_finalize_cmd; 1996 iob->match = qeth_mpc_match_reply; 1997 return iob; 1998 } 1999 2000 /** 2001 * qeth_send_control_data() - send control command to the card 2002 * @card: qeth_card structure pointer 2003 * @iob: qeth_cmd_buffer pointer 2004 * @reply_cb: callback function pointer 2005 * cb_card: pointer to the qeth_card structure 2006 * cb_reply: pointer to the qeth_reply structure 2007 * cb_cmd: pointer to the original iob for non-IPA 2008 * commands, or to the qeth_ipa_cmd structure 2009 * for the IPA commands. 2010 * @reply_param: private pointer passed to the callback 2011 * 2012 * Callback function gets called one or more times, with cb_cmd 2013 * pointing to the response returned by the hardware. Callback 2014 * function must return 2015 * > 0 if more reply blocks are expected, 2016 * 0 if the last or only reply block is received, and 2017 * < 0 on error. 2018 * Callback function can get the value of the reply_param pointer from the 2019 * field 'param' of the structure qeth_reply. 2020 */ 2021 2022 static int qeth_send_control_data(struct qeth_card *card, 2023 struct qeth_cmd_buffer *iob, 2024 int (*reply_cb)(struct qeth_card *cb_card, 2025 struct qeth_reply *cb_reply, 2026 unsigned long cb_cmd), 2027 void *reply_param) 2028 { 2029 struct qeth_channel *channel = iob->channel; 2030 struct qeth_reply *reply = &iob->reply; 2031 long timeout = iob->timeout; 2032 int rc; 2033 2034 QETH_CARD_TEXT(card, 2, "sendctl"); 2035 2036 reply->callback = reply_cb; 2037 reply->param = reply_param; 2038 2039 timeout = wait_event_interruptible_timeout(card->wait_q, 2040 qeth_trylock_channel(channel, iob), 2041 timeout); 2042 if (timeout <= 0) { 2043 qeth_put_cmd(iob); 2044 return (timeout == -ERESTARTSYS) ? -EINTR : -ETIME; 2045 } 2046 2047 if (iob->finalize) 2048 iob->finalize(card, iob); 2049 QETH_DBF_HEX(CTRL, 2, iob->data, min(iob->length, QETH_DBF_CTRL_LEN)); 2050 2051 qeth_enqueue_cmd(card, iob); 2052 2053 /* This pairs with iob->callback, and keeps the iob alive after IO: */ 2054 qeth_get_cmd(iob); 2055 2056 QETH_CARD_TEXT(card, 6, "noirqpnd"); 2057 spin_lock_irq(get_ccwdev_lock(channel->ccwdev)); 2058 rc = ccw_device_start_timeout(channel->ccwdev, __ccw_from_cmd(iob), 2059 (addr_t) iob, 0, 0, timeout); 2060 spin_unlock_irq(get_ccwdev_lock(channel->ccwdev)); 2061 if (rc) { 2062 QETH_DBF_MESSAGE(2, "qeth_send_control_data on device %x: ccw_device_start rc = %i\n", 2063 CARD_DEVID(card), rc); 2064 QETH_CARD_TEXT_(card, 2, " err%d", rc); 2065 qeth_dequeue_cmd(card, iob); 2066 qeth_put_cmd(iob); 2067 qeth_unlock_channel(card, channel); 2068 goto out; 2069 } 2070 2071 timeout = wait_for_completion_interruptible_timeout(&iob->done, 2072 timeout); 2073 if (timeout <= 0) 2074 rc = (timeout == -ERESTARTSYS) ? -EINTR : -ETIME; 2075 2076 qeth_dequeue_cmd(card, iob); 2077 2078 if (reply_cb) { 2079 /* Wait until the callback for a late reply has completed: */ 2080 spin_lock_irq(&iob->lock); 2081 if (rc) 2082 /* Zap any callback that's still pending: */ 2083 iob->rc = rc; 2084 spin_unlock_irq(&iob->lock); 2085 } 2086 2087 if (!rc) 2088 rc = iob->rc; 2089 2090 out: 2091 qeth_put_cmd(iob); 2092 return rc; 2093 } 2094 2095 struct qeth_node_desc { 2096 struct node_descriptor nd1; 2097 struct node_descriptor nd2; 2098 struct node_descriptor nd3; 2099 }; 2100 2101 static void qeth_read_conf_data_cb(struct qeth_card *card, 2102 struct qeth_cmd_buffer *iob, 2103 unsigned int data_length) 2104 { 2105 struct qeth_node_desc *nd = (struct qeth_node_desc *) iob->data; 2106 int rc = 0; 2107 u8 *tag; 2108 2109 QETH_CARD_TEXT(card, 2, "cfgunit"); 2110 2111 if (data_length < sizeof(*nd)) { 2112 rc = -EINVAL; 2113 goto out; 2114 } 2115 2116 card->info.is_vm_nic = nd->nd1.plant[0] == _ascebc['V'] && 2117 nd->nd1.plant[1] == _ascebc['M']; 2118 tag = (u8 *)&nd->nd1.tag; 2119 card->info.chpid = tag[0]; 2120 card->info.unit_addr2 = tag[1]; 2121 2122 tag = (u8 *)&nd->nd2.tag; 2123 card->info.cula = tag[1]; 2124 2125 card->info.use_v1_blkt = nd->nd3.model[0] == 0xF0 && 2126 nd->nd3.model[1] == 0xF0 && 2127 nd->nd3.model[2] >= 0xF1 && 2128 nd->nd3.model[2] <= 0xF4; 2129 2130 out: 2131 qeth_notify_cmd(iob, rc); 2132 qeth_put_cmd(iob); 2133 } 2134 2135 static int qeth_read_conf_data(struct qeth_card *card) 2136 { 2137 struct qeth_channel *channel = &card->data; 2138 struct qeth_cmd_buffer *iob; 2139 struct ciw *ciw; 2140 2141 /* scan for RCD command in extended SenseID data */ 2142 ciw = ccw_device_get_ciw(channel->ccwdev, CIW_TYPE_RCD); 2143 if (!ciw || ciw->cmd == 0) 2144 return -EOPNOTSUPP; 2145 if (ciw->count < sizeof(struct qeth_node_desc)) 2146 return -EINVAL; 2147 2148 iob = qeth_alloc_cmd(channel, ciw->count, 1, QETH_RCD_TIMEOUT); 2149 if (!iob) 2150 return -ENOMEM; 2151 2152 iob->callback = qeth_read_conf_data_cb; 2153 qeth_setup_ccw(__ccw_from_cmd(iob), ciw->cmd, 0, iob->length, 2154 iob->data); 2155 2156 return qeth_send_control_data(card, iob, NULL, NULL); 2157 } 2158 2159 static int qeth_idx_check_activate_response(struct qeth_card *card, 2160 struct qeth_channel *channel, 2161 struct qeth_cmd_buffer *iob) 2162 { 2163 int rc; 2164 2165 rc = qeth_check_idx_response(card, iob->data); 2166 if (rc) 2167 return rc; 2168 2169 if (QETH_IS_IDX_ACT_POS_REPLY(iob->data)) 2170 return 0; 2171 2172 /* negative reply: */ 2173 QETH_CARD_TEXT_(card, 2, "idxneg%c", 2174 QETH_IDX_ACT_CAUSE_CODE(iob->data)); 2175 2176 switch (QETH_IDX_ACT_CAUSE_CODE(iob->data)) { 2177 case QETH_IDX_ACT_ERR_EXCL: 2178 dev_err(&channel->ccwdev->dev, 2179 "The adapter is used exclusively by another host\n"); 2180 return -EBUSY; 2181 case QETH_IDX_ACT_ERR_AUTH: 2182 case QETH_IDX_ACT_ERR_AUTH_USER: 2183 dev_err(&channel->ccwdev->dev, 2184 "Setting the device online failed because of insufficient authorization\n"); 2185 return -EPERM; 2186 default: 2187 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: negative reply\n", 2188 CCW_DEVID(channel->ccwdev)); 2189 return -EIO; 2190 } 2191 } 2192 2193 static void qeth_idx_activate_read_channel_cb(struct qeth_card *card, 2194 struct qeth_cmd_buffer *iob, 2195 unsigned int data_length) 2196 { 2197 struct qeth_channel *channel = iob->channel; 2198 u16 peer_level; 2199 int rc; 2200 2201 QETH_CARD_TEXT(card, 2, "idxrdcb"); 2202 2203 rc = qeth_idx_check_activate_response(card, channel, iob); 2204 if (rc) 2205 goto out; 2206 2207 memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2); 2208 if (peer_level != qeth_peer_func_level(card->info.func_level)) { 2209 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n", 2210 CCW_DEVID(channel->ccwdev), 2211 card->info.func_level, peer_level); 2212 rc = -EINVAL; 2213 goto out; 2214 } 2215 2216 memcpy(&card->token.issuer_rm_r, 2217 QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data), 2218 QETH_MPC_TOKEN_LENGTH); 2219 memcpy(&card->info.mcl_level[0], 2220 QETH_IDX_REPLY_LEVEL(iob->data), QETH_MCL_LENGTH); 2221 2222 out: 2223 qeth_notify_cmd(iob, rc); 2224 qeth_put_cmd(iob); 2225 } 2226 2227 static void qeth_idx_activate_write_channel_cb(struct qeth_card *card, 2228 struct qeth_cmd_buffer *iob, 2229 unsigned int data_length) 2230 { 2231 struct qeth_channel *channel = iob->channel; 2232 u16 peer_level; 2233 int rc; 2234 2235 QETH_CARD_TEXT(card, 2, "idxwrcb"); 2236 2237 rc = qeth_idx_check_activate_response(card, channel, iob); 2238 if (rc) 2239 goto out; 2240 2241 memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2); 2242 if ((peer_level & ~0x0100) != 2243 qeth_peer_func_level(card->info.func_level)) { 2244 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n", 2245 CCW_DEVID(channel->ccwdev), 2246 card->info.func_level, peer_level); 2247 rc = -EINVAL; 2248 } 2249 2250 out: 2251 qeth_notify_cmd(iob, rc); 2252 qeth_put_cmd(iob); 2253 } 2254 2255 static void qeth_idx_setup_activate_cmd(struct qeth_card *card, 2256 struct qeth_cmd_buffer *iob) 2257 { 2258 u16 addr = (card->info.cula << 8) + card->info.unit_addr2; 2259 u8 port = ((u8)card->dev->dev_port) | 0x80; 2260 struct ccw1 *ccw = __ccw_from_cmd(iob); 2261 2262 qeth_setup_ccw(&ccw[0], CCW_CMD_WRITE, CCW_FLAG_CC, IDX_ACTIVATE_SIZE, 2263 iob->data); 2264 qeth_setup_ccw(&ccw[1], CCW_CMD_READ, 0, iob->length, iob->data); 2265 iob->finalize = qeth_idx_finalize_cmd; 2266 2267 port |= QETH_IDX_ACT_INVAL_FRAME; 2268 memcpy(QETH_IDX_ACT_PNO(iob->data), &port, 1); 2269 memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data), 2270 &card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH); 2271 memcpy(QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2272 &card->info.func_level, 2); 2273 memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &card->info.ddev_devno, 2); 2274 memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &addr, 2); 2275 } 2276 2277 static int qeth_idx_activate_read_channel(struct qeth_card *card) 2278 { 2279 struct qeth_channel *channel = &card->read; 2280 struct qeth_cmd_buffer *iob; 2281 int rc; 2282 2283 QETH_CARD_TEXT(card, 2, "idxread"); 2284 2285 iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT); 2286 if (!iob) 2287 return -ENOMEM; 2288 2289 memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE); 2290 qeth_idx_setup_activate_cmd(card, iob); 2291 iob->callback = qeth_idx_activate_read_channel_cb; 2292 2293 rc = qeth_send_control_data(card, iob, NULL, NULL); 2294 if (rc) 2295 return rc; 2296 2297 channel->state = CH_STATE_UP; 2298 return 0; 2299 } 2300 2301 static int qeth_idx_activate_write_channel(struct qeth_card *card) 2302 { 2303 struct qeth_channel *channel = &card->write; 2304 struct qeth_cmd_buffer *iob; 2305 int rc; 2306 2307 QETH_CARD_TEXT(card, 2, "idxwrite"); 2308 2309 iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT); 2310 if (!iob) 2311 return -ENOMEM; 2312 2313 memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE); 2314 qeth_idx_setup_activate_cmd(card, iob); 2315 iob->callback = qeth_idx_activate_write_channel_cb; 2316 2317 rc = qeth_send_control_data(card, iob, NULL, NULL); 2318 if (rc) 2319 return rc; 2320 2321 channel->state = CH_STATE_UP; 2322 return 0; 2323 } 2324 2325 static int qeth_cm_enable_cb(struct qeth_card *card, struct qeth_reply *reply, 2326 unsigned long data) 2327 { 2328 struct qeth_cmd_buffer *iob; 2329 2330 QETH_CARD_TEXT(card, 2, "cmenblcb"); 2331 2332 iob = (struct qeth_cmd_buffer *) data; 2333 memcpy(&card->token.cm_filter_r, 2334 QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data), 2335 QETH_MPC_TOKEN_LENGTH); 2336 return 0; 2337 } 2338 2339 static int qeth_cm_enable(struct qeth_card *card) 2340 { 2341 struct qeth_cmd_buffer *iob; 2342 2343 QETH_CARD_TEXT(card, 2, "cmenable"); 2344 2345 iob = qeth_mpc_alloc_cmd(card, CM_ENABLE, CM_ENABLE_SIZE); 2346 if (!iob) 2347 return -ENOMEM; 2348 2349 memcpy(QETH_CM_ENABLE_ISSUER_RM_TOKEN(iob->data), 2350 &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH); 2351 memcpy(QETH_CM_ENABLE_FILTER_TOKEN(iob->data), 2352 &card->token.cm_filter_w, QETH_MPC_TOKEN_LENGTH); 2353 2354 return qeth_send_control_data(card, iob, qeth_cm_enable_cb, NULL); 2355 } 2356 2357 static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply, 2358 unsigned long data) 2359 { 2360 struct qeth_cmd_buffer *iob; 2361 2362 QETH_CARD_TEXT(card, 2, "cmsetpcb"); 2363 2364 iob = (struct qeth_cmd_buffer *) data; 2365 memcpy(&card->token.cm_connection_r, 2366 QETH_CM_SETUP_RESP_DEST_ADDR(iob->data), 2367 QETH_MPC_TOKEN_LENGTH); 2368 return 0; 2369 } 2370 2371 static int qeth_cm_setup(struct qeth_card *card) 2372 { 2373 struct qeth_cmd_buffer *iob; 2374 2375 QETH_CARD_TEXT(card, 2, "cmsetup"); 2376 2377 iob = qeth_mpc_alloc_cmd(card, CM_SETUP, CM_SETUP_SIZE); 2378 if (!iob) 2379 return -ENOMEM; 2380 2381 memcpy(QETH_CM_SETUP_DEST_ADDR(iob->data), 2382 &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH); 2383 memcpy(QETH_CM_SETUP_CONNECTION_TOKEN(iob->data), 2384 &card->token.cm_connection_w, QETH_MPC_TOKEN_LENGTH); 2385 memcpy(QETH_CM_SETUP_FILTER_TOKEN(iob->data), 2386 &card->token.cm_filter_r, QETH_MPC_TOKEN_LENGTH); 2387 return qeth_send_control_data(card, iob, qeth_cm_setup_cb, NULL); 2388 } 2389 2390 static bool qeth_is_supported_link_type(struct qeth_card *card, u8 link_type) 2391 { 2392 if (link_type == QETH_LINK_TYPE_LANE_TR || 2393 link_type == QETH_LINK_TYPE_HSTR) { 2394 dev_err(&card->gdev->dev, "Unsupported Token Ring device\n"); 2395 return false; 2396 } 2397 2398 return true; 2399 } 2400 2401 static int qeth_update_max_mtu(struct qeth_card *card, unsigned int max_mtu) 2402 { 2403 struct net_device *dev = card->dev; 2404 unsigned int new_mtu; 2405 2406 if (!max_mtu) { 2407 /* IQD needs accurate max MTU to set up its RX buffers: */ 2408 if (IS_IQD(card)) 2409 return -EINVAL; 2410 /* tolerate quirky HW: */ 2411 max_mtu = ETH_MAX_MTU; 2412 } 2413 2414 rtnl_lock(); 2415 if (IS_IQD(card)) { 2416 /* move any device with default MTU to new max MTU: */ 2417 new_mtu = (dev->mtu == dev->max_mtu) ? max_mtu : dev->mtu; 2418 2419 /* adjust RX buffer size to new max MTU: */ 2420 card->qdio.in_buf_size = max_mtu + 2 * PAGE_SIZE; 2421 if (dev->max_mtu && dev->max_mtu != max_mtu) 2422 qeth_free_qdio_queues(card); 2423 } else { 2424 if (dev->mtu) 2425 new_mtu = dev->mtu; 2426 /* default MTUs for first setup: */ 2427 else if (IS_LAYER2(card)) 2428 new_mtu = ETH_DATA_LEN; 2429 else 2430 new_mtu = ETH_DATA_LEN - 8; /* allow for LLC + SNAP */ 2431 } 2432 2433 dev->max_mtu = max_mtu; 2434 dev->mtu = min(new_mtu, max_mtu); 2435 rtnl_unlock(); 2436 return 0; 2437 } 2438 2439 static int qeth_get_mtu_outof_framesize(int framesize) 2440 { 2441 switch (framesize) { 2442 case 0x4000: 2443 return 8192; 2444 case 0x6000: 2445 return 16384; 2446 case 0xa000: 2447 return 32768; 2448 case 0xffff: 2449 return 57344; 2450 default: 2451 return 0; 2452 } 2453 } 2454 2455 static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply, 2456 unsigned long data) 2457 { 2458 __u16 mtu, framesize; 2459 __u16 len; 2460 struct qeth_cmd_buffer *iob; 2461 u8 link_type = 0; 2462 2463 QETH_CARD_TEXT(card, 2, "ulpenacb"); 2464 2465 iob = (struct qeth_cmd_buffer *) data; 2466 memcpy(&card->token.ulp_filter_r, 2467 QETH_ULP_ENABLE_RESP_FILTER_TOKEN(iob->data), 2468 QETH_MPC_TOKEN_LENGTH); 2469 if (IS_IQD(card)) { 2470 memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2); 2471 mtu = qeth_get_mtu_outof_framesize(framesize); 2472 } else { 2473 mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data); 2474 } 2475 *(u16 *)reply->param = mtu; 2476 2477 memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2); 2478 if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) { 2479 memcpy(&link_type, 2480 QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1); 2481 if (!qeth_is_supported_link_type(card, link_type)) 2482 return -EPROTONOSUPPORT; 2483 } 2484 2485 card->info.link_type = link_type; 2486 QETH_CARD_TEXT_(card, 2, "link%d", card->info.link_type); 2487 return 0; 2488 } 2489 2490 static u8 qeth_mpc_select_prot_type(struct qeth_card *card) 2491 { 2492 return IS_LAYER2(card) ? QETH_MPC_PROT_L2 : QETH_MPC_PROT_L3; 2493 } 2494 2495 static int qeth_ulp_enable(struct qeth_card *card) 2496 { 2497 u8 prot_type = qeth_mpc_select_prot_type(card); 2498 struct qeth_cmd_buffer *iob; 2499 u16 max_mtu; 2500 int rc; 2501 2502 QETH_CARD_TEXT(card, 2, "ulpenabl"); 2503 2504 iob = qeth_mpc_alloc_cmd(card, ULP_ENABLE, ULP_ENABLE_SIZE); 2505 if (!iob) 2506 return -ENOMEM; 2507 2508 *(QETH_ULP_ENABLE_LINKNUM(iob->data)) = (u8) card->dev->dev_port; 2509 memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1); 2510 memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data), 2511 &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH); 2512 memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data), 2513 &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH); 2514 rc = qeth_send_control_data(card, iob, qeth_ulp_enable_cb, &max_mtu); 2515 if (rc) 2516 return rc; 2517 return qeth_update_max_mtu(card, max_mtu); 2518 } 2519 2520 static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply, 2521 unsigned long data) 2522 { 2523 struct qeth_cmd_buffer *iob; 2524 2525 QETH_CARD_TEXT(card, 2, "ulpstpcb"); 2526 2527 iob = (struct qeth_cmd_buffer *) data; 2528 memcpy(&card->token.ulp_connection_r, 2529 QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data), 2530 QETH_MPC_TOKEN_LENGTH); 2531 if (!strncmp("00S", QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data), 2532 3)) { 2533 QETH_CARD_TEXT(card, 2, "olmlimit"); 2534 dev_err(&card->gdev->dev, "A connection could not be " 2535 "established because of an OLM limit\n"); 2536 return -EMLINK; 2537 } 2538 return 0; 2539 } 2540 2541 static int qeth_ulp_setup(struct qeth_card *card) 2542 { 2543 __u16 temp; 2544 struct qeth_cmd_buffer *iob; 2545 2546 QETH_CARD_TEXT(card, 2, "ulpsetup"); 2547 2548 iob = qeth_mpc_alloc_cmd(card, ULP_SETUP, ULP_SETUP_SIZE); 2549 if (!iob) 2550 return -ENOMEM; 2551 2552 memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data), 2553 &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH); 2554 memcpy(QETH_ULP_SETUP_CONNECTION_TOKEN(iob->data), 2555 &card->token.ulp_connection_w, QETH_MPC_TOKEN_LENGTH); 2556 memcpy(QETH_ULP_SETUP_FILTER_TOKEN(iob->data), 2557 &card->token.ulp_filter_r, QETH_MPC_TOKEN_LENGTH); 2558 2559 memcpy(QETH_ULP_SETUP_CUA(iob->data), &card->info.ddev_devno, 2); 2560 temp = (card->info.cula << 8) + card->info.unit_addr2; 2561 memcpy(QETH_ULP_SETUP_REAL_DEVADDR(iob->data), &temp, 2); 2562 return qeth_send_control_data(card, iob, qeth_ulp_setup_cb, NULL); 2563 } 2564 2565 static int qeth_alloc_out_buf(struct qeth_qdio_out_q *q, unsigned int bidx, 2566 gfp_t gfp) 2567 { 2568 struct qeth_qdio_out_buffer *newbuf; 2569 2570 newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, gfp); 2571 if (!newbuf) 2572 return -ENOMEM; 2573 2574 newbuf->buffer = q->qdio_bufs[bidx]; 2575 skb_queue_head_init(&newbuf->skb_list); 2576 lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key); 2577 atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY); 2578 q->bufs[bidx] = newbuf; 2579 return 0; 2580 } 2581 2582 static void qeth_free_output_queue(struct qeth_qdio_out_q *q) 2583 { 2584 if (!q) 2585 return; 2586 2587 qeth_drain_output_queue(q, true); 2588 qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q); 2589 kfree(q); 2590 } 2591 2592 static struct qeth_qdio_out_q *qeth_alloc_output_queue(void) 2593 { 2594 struct qeth_qdio_out_q *q = kzalloc(sizeof(*q), GFP_KERNEL); 2595 unsigned int i; 2596 2597 if (!q) 2598 return NULL; 2599 2600 if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) 2601 goto err_qdio_bufs; 2602 2603 for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) { 2604 if (qeth_alloc_out_buf(q, i, GFP_KERNEL)) 2605 goto err_out_bufs; 2606 } 2607 2608 return q; 2609 2610 err_out_bufs: 2611 while (i > 0) 2612 qeth_free_out_buf(q->bufs[--i]); 2613 qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q); 2614 err_qdio_bufs: 2615 kfree(q); 2616 return NULL; 2617 } 2618 2619 static void qeth_tx_completion_timer(struct timer_list *timer) 2620 { 2621 struct qeth_qdio_out_q *queue = timer_container_of(queue, timer, 2622 timer); 2623 2624 napi_schedule(&queue->napi); 2625 QETH_TXQ_STAT_INC(queue, completion_timer); 2626 } 2627 2628 static int qeth_alloc_qdio_queues(struct qeth_card *card) 2629 { 2630 unsigned int i; 2631 2632 QETH_CARD_TEXT(card, 2, "allcqdbf"); 2633 2634 /* completion */ 2635 if (qeth_alloc_cq(card)) 2636 goto out_err; 2637 2638 if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED, 2639 QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED) 2640 return 0; 2641 2642 /* inbound buffer pool */ 2643 if (qeth_alloc_buffer_pool(card)) 2644 goto out_buffer_pool; 2645 2646 /* outbound */ 2647 for (i = 0; i < card->qdio.no_out_queues; ++i) { 2648 struct qeth_qdio_out_q *queue; 2649 2650 queue = qeth_alloc_output_queue(); 2651 if (!queue) 2652 goto out_freeoutq; 2653 QETH_CARD_TEXT_(card, 2, "outq %i", i); 2654 QETH_CARD_HEX(card, 2, &queue, sizeof(void *)); 2655 card->qdio.out_qs[i] = queue; 2656 queue->card = card; 2657 queue->queue_no = i; 2658 INIT_LIST_HEAD(&queue->pending_bufs); 2659 spin_lock_init(&queue->lock); 2660 timer_setup(&queue->timer, qeth_tx_completion_timer, 0); 2661 if (IS_IQD(card)) { 2662 queue->coalesce_usecs = QETH_TX_COALESCE_USECS; 2663 queue->max_coalesced_frames = QETH_TX_MAX_COALESCED_FRAMES; 2664 queue->rescan_usecs = QETH_TX_TIMER_USECS; 2665 } else { 2666 queue->coalesce_usecs = USEC_PER_SEC; 2667 queue->max_coalesced_frames = 0; 2668 queue->rescan_usecs = 10 * USEC_PER_SEC; 2669 } 2670 queue->priority = QETH_QIB_PQUE_PRIO_DEFAULT; 2671 } 2672 2673 return 0; 2674 2675 out_freeoutq: 2676 while (i > 0) { 2677 qeth_free_output_queue(card->qdio.out_qs[--i]); 2678 card->qdio.out_qs[i] = NULL; 2679 } 2680 qeth_free_buffer_pool(card); 2681 out_buffer_pool: 2682 atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED); 2683 qeth_free_cq(card); 2684 out_err: 2685 return -ENOMEM; 2686 } 2687 2688 static void qeth_free_qdio_queues(struct qeth_card *card) 2689 { 2690 int i, j; 2691 2692 qeth_free_cq(card); 2693 2694 if (atomic_xchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED) == 2695 QETH_QDIO_UNINITIALIZED) 2696 return; 2697 2698 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) { 2699 if (card->qdio.in_q->bufs[j].rx_skb) { 2700 consume_skb(card->qdio.in_q->bufs[j].rx_skb); 2701 card->qdio.in_q->bufs[j].rx_skb = NULL; 2702 } 2703 } 2704 2705 /* inbound buffer pool */ 2706 qeth_free_buffer_pool(card); 2707 /* free outbound qdio_qs */ 2708 for (i = 0; i < card->qdio.no_out_queues; i++) { 2709 qeth_free_output_queue(card->qdio.out_qs[i]); 2710 card->qdio.out_qs[i] = NULL; 2711 } 2712 } 2713 2714 static void qeth_fill_qib_parms(struct qeth_card *card, 2715 struct qeth_qib_parms *parms) 2716 { 2717 struct qeth_qdio_out_q *queue; 2718 unsigned int i; 2719 2720 parms->pcit_magic[0] = 'P'; 2721 parms->pcit_magic[1] = 'C'; 2722 parms->pcit_magic[2] = 'I'; 2723 parms->pcit_magic[3] = 'T'; 2724 ASCEBC(parms->pcit_magic, sizeof(parms->pcit_magic)); 2725 parms->pcit_a = QETH_PCI_THRESHOLD_A(card); 2726 parms->pcit_b = QETH_PCI_THRESHOLD_B(card); 2727 parms->pcit_c = QETH_PCI_TIMER_VALUE(card); 2728 2729 parms->blkt_magic[0] = 'B'; 2730 parms->blkt_magic[1] = 'L'; 2731 parms->blkt_magic[2] = 'K'; 2732 parms->blkt_magic[3] = 'T'; 2733 ASCEBC(parms->blkt_magic, sizeof(parms->blkt_magic)); 2734 parms->blkt_total = card->info.blkt.time_total; 2735 parms->blkt_inter_packet = card->info.blkt.inter_packet; 2736 parms->blkt_inter_packet_jumbo = card->info.blkt.inter_packet_jumbo; 2737 2738 /* Prio-queueing implicitly uses the default priorities: */ 2739 if (qeth_uses_tx_prio_queueing(card) || card->qdio.no_out_queues == 1) 2740 return; 2741 2742 parms->pque_magic[0] = 'P'; 2743 parms->pque_magic[1] = 'Q'; 2744 parms->pque_magic[2] = 'U'; 2745 parms->pque_magic[3] = 'E'; 2746 ASCEBC(parms->pque_magic, sizeof(parms->pque_magic)); 2747 parms->pque_order = QETH_QIB_PQUE_ORDER_RR; 2748 parms->pque_units = QETH_QIB_PQUE_UNITS_SBAL; 2749 2750 qeth_for_each_output_queue(card, queue, i) 2751 parms->pque_priority[i] = queue->priority; 2752 } 2753 2754 static int qeth_qdio_activate(struct qeth_card *card) 2755 { 2756 QETH_CARD_TEXT(card, 3, "qdioact"); 2757 return qdio_activate(CARD_DDEV(card)); 2758 } 2759 2760 static int qeth_dm_act(struct qeth_card *card) 2761 { 2762 struct qeth_cmd_buffer *iob; 2763 2764 QETH_CARD_TEXT(card, 2, "dmact"); 2765 2766 iob = qeth_mpc_alloc_cmd(card, DM_ACT, DM_ACT_SIZE); 2767 if (!iob) 2768 return -ENOMEM; 2769 2770 memcpy(QETH_DM_ACT_DEST_ADDR(iob->data), 2771 &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH); 2772 memcpy(QETH_DM_ACT_CONNECTION_TOKEN(iob->data), 2773 &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH); 2774 return qeth_send_control_data(card, iob, NULL, NULL); 2775 } 2776 2777 static int qeth_mpc_initialize(struct qeth_card *card) 2778 { 2779 int rc; 2780 2781 QETH_CARD_TEXT(card, 2, "mpcinit"); 2782 2783 rc = qeth_issue_next_read(card); 2784 if (rc) { 2785 QETH_CARD_TEXT_(card, 2, "1err%d", rc); 2786 return rc; 2787 } 2788 rc = qeth_cm_enable(card); 2789 if (rc) { 2790 QETH_CARD_TEXT_(card, 2, "2err%d", rc); 2791 return rc; 2792 } 2793 rc = qeth_cm_setup(card); 2794 if (rc) { 2795 QETH_CARD_TEXT_(card, 2, "3err%d", rc); 2796 return rc; 2797 } 2798 rc = qeth_ulp_enable(card); 2799 if (rc) { 2800 QETH_CARD_TEXT_(card, 2, "4err%d", rc); 2801 return rc; 2802 } 2803 rc = qeth_ulp_setup(card); 2804 if (rc) { 2805 QETH_CARD_TEXT_(card, 2, "5err%d", rc); 2806 return rc; 2807 } 2808 rc = qeth_alloc_qdio_queues(card); 2809 if (rc) { 2810 QETH_CARD_TEXT_(card, 2, "5err%d", rc); 2811 return rc; 2812 } 2813 rc = qeth_qdio_establish(card); 2814 if (rc) { 2815 QETH_CARD_TEXT_(card, 2, "6err%d", rc); 2816 qeth_free_qdio_queues(card); 2817 return rc; 2818 } 2819 rc = qeth_qdio_activate(card); 2820 if (rc) { 2821 QETH_CARD_TEXT_(card, 2, "7err%d", rc); 2822 return rc; 2823 } 2824 rc = qeth_dm_act(card); 2825 if (rc) { 2826 QETH_CARD_TEXT_(card, 2, "8err%d", rc); 2827 return rc; 2828 } 2829 2830 return 0; 2831 } 2832 2833 static void qeth_print_status_message(struct qeth_card *card) 2834 { 2835 switch (card->info.type) { 2836 case QETH_CARD_TYPE_OSD: 2837 case QETH_CARD_TYPE_OSM: 2838 case QETH_CARD_TYPE_OSX: 2839 /* VM will use a non-zero first character 2840 * to indicate a HiperSockets like reporting 2841 * of the level OSA sets the first character to zero 2842 * */ 2843 if (!card->info.mcl_level[0]) { 2844 scnprintf(card->info.mcl_level, 2845 sizeof(card->info.mcl_level), 2846 "%02x%02x", 2847 card->info.mcl_level[2], 2848 card->info.mcl_level[3]); 2849 break; 2850 } 2851 fallthrough; 2852 case QETH_CARD_TYPE_IQD: 2853 if (IS_VM_NIC(card) || (card->info.mcl_level[0] & 0x80)) { 2854 card->info.mcl_level[0] = (char) _ebcasc[(__u8) 2855 card->info.mcl_level[0]]; 2856 card->info.mcl_level[1] = (char) _ebcasc[(__u8) 2857 card->info.mcl_level[1]]; 2858 card->info.mcl_level[2] = (char) _ebcasc[(__u8) 2859 card->info.mcl_level[2]]; 2860 card->info.mcl_level[3] = (char) _ebcasc[(__u8) 2861 card->info.mcl_level[3]]; 2862 card->info.mcl_level[QETH_MCL_LENGTH] = 0; 2863 } 2864 break; 2865 default: 2866 memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1); 2867 } 2868 dev_info(&card->gdev->dev, 2869 "Device is a%s card%s%s%s\nwith link type %s.\n", 2870 qeth_get_cardname(card), 2871 (card->info.mcl_level[0]) ? " (level: " : "", 2872 (card->info.mcl_level[0]) ? card->info.mcl_level : "", 2873 (card->info.mcl_level[0]) ? ")" : "", 2874 qeth_get_cardname_short(card)); 2875 } 2876 2877 static void qeth_initialize_working_pool_list(struct qeth_card *card) 2878 { 2879 struct qeth_buffer_pool_entry *entry; 2880 2881 QETH_CARD_TEXT(card, 5, "inwrklst"); 2882 2883 list_for_each_entry(entry, 2884 &card->qdio.init_pool.entry_list, init_list) { 2885 qeth_put_buffer_pool_entry(card, entry); 2886 } 2887 } 2888 2889 static struct qeth_buffer_pool_entry *qeth_find_free_buffer_pool_entry( 2890 struct qeth_card *card) 2891 { 2892 struct qeth_buffer_pool_entry *entry; 2893 int i, free; 2894 2895 if (list_empty(&card->qdio.in_buf_pool.entry_list)) 2896 return NULL; 2897 2898 list_for_each_entry(entry, &card->qdio.in_buf_pool.entry_list, list) { 2899 free = 1; 2900 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) { 2901 if (page_count(entry->elements[i]) > 1) { 2902 free = 0; 2903 break; 2904 } 2905 } 2906 if (free) { 2907 list_del_init(&entry->list); 2908 return entry; 2909 } 2910 } 2911 2912 /* no free buffer in pool so take first one and swap pages */ 2913 entry = list_first_entry(&card->qdio.in_buf_pool.entry_list, 2914 struct qeth_buffer_pool_entry, list); 2915 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) { 2916 if (page_count(entry->elements[i]) > 1) { 2917 struct page *page = dev_alloc_page(); 2918 2919 if (!page) 2920 return NULL; 2921 2922 __free_page(entry->elements[i]); 2923 entry->elements[i] = page; 2924 QETH_CARD_STAT_INC(card, rx_sg_alloc_page); 2925 } 2926 } 2927 list_del_init(&entry->list); 2928 return entry; 2929 } 2930 2931 static int qeth_init_input_buffer(struct qeth_card *card, 2932 struct qeth_qdio_buffer *buf) 2933 { 2934 struct qeth_buffer_pool_entry *pool_entry = buf->pool_entry; 2935 int i; 2936 2937 if ((card->options.cq == QETH_CQ_ENABLED) && (!buf->rx_skb)) { 2938 buf->rx_skb = netdev_alloc_skb(card->dev, 2939 ETH_HLEN + 2940 sizeof(struct ipv6hdr)); 2941 if (!buf->rx_skb) 2942 return -ENOMEM; 2943 } 2944 2945 if (!pool_entry) { 2946 pool_entry = qeth_find_free_buffer_pool_entry(card); 2947 if (!pool_entry) 2948 return -ENOBUFS; 2949 2950 buf->pool_entry = pool_entry; 2951 } 2952 2953 /* 2954 * since the buffer is accessed only from the input_tasklet 2955 * there shouldn't be a need to synchronize; also, since we use 2956 * the QETH_IN_BUF_REQUEUE_THRESHOLD we should never run out off 2957 * buffers 2958 */ 2959 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) { 2960 buf->buffer->element[i].length = PAGE_SIZE; 2961 buf->buffer->element[i].addr = u64_to_dma64( 2962 page_to_phys(pool_entry->elements[i])); 2963 if (i == QETH_MAX_BUFFER_ELEMENTS(card) - 1) 2964 buf->buffer->element[i].eflags = SBAL_EFLAGS_LAST_ENTRY; 2965 else 2966 buf->buffer->element[i].eflags = 0; 2967 buf->buffer->element[i].sflags = 0; 2968 } 2969 return 0; 2970 } 2971 2972 static unsigned int qeth_tx_select_bulk_max(struct qeth_card *card, 2973 struct qeth_qdio_out_q *queue) 2974 { 2975 if (!IS_IQD(card) || 2976 qeth_iqd_is_mcast_queue(card, queue) || 2977 card->options.cq == QETH_CQ_ENABLED || 2978 qdio_get_ssqd_desc(CARD_DDEV(card), &card->ssqd)) 2979 return 1; 2980 2981 return card->ssqd.mmwc ? card->ssqd.mmwc : 1; 2982 } 2983 2984 static int qeth_init_qdio_queues(struct qeth_card *card) 2985 { 2986 unsigned int rx_bufs = card->qdio.in_buf_pool.buf_count; 2987 unsigned int i; 2988 int rc; 2989 2990 QETH_CARD_TEXT(card, 2, "initqdqs"); 2991 2992 /* inbound queue */ 2993 qdio_reset_buffers(card->qdio.in_q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q); 2994 memset(&card->rx, 0, sizeof(struct qeth_rx)); 2995 2996 qeth_initialize_working_pool_list(card); 2997 /*give only as many buffers to hardware as we have buffer pool entries*/ 2998 for (i = 0; i < rx_bufs; i++) { 2999 rc = qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]); 3000 if (rc) 3001 return rc; 3002 } 3003 3004 card->qdio.in_q->next_buf_to_init = QDIO_BUFNR(rx_bufs); 3005 rc = qdio_add_bufs_to_input_queue(CARD_DDEV(card), 0, 0, rx_bufs); 3006 if (rc) { 3007 QETH_CARD_TEXT_(card, 2, "1err%d", rc); 3008 return rc; 3009 } 3010 3011 /* completion */ 3012 rc = qeth_cq_init(card); 3013 if (rc) { 3014 return rc; 3015 } 3016 3017 /* outbound queue */ 3018 for (i = 0; i < card->qdio.no_out_queues; ++i) { 3019 struct qeth_qdio_out_q *queue = card->qdio.out_qs[i]; 3020 3021 qdio_reset_buffers(queue->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q); 3022 queue->max_elements = QETH_MAX_BUFFER_ELEMENTS(card); 3023 queue->next_buf_to_fill = 0; 3024 queue->do_pack = 0; 3025 queue->prev_hdr = NULL; 3026 queue->coalesced_frames = 0; 3027 queue->bulk_start = 0; 3028 queue->bulk_count = 0; 3029 queue->bulk_max = qeth_tx_select_bulk_max(card, queue); 3030 atomic_set(&queue->used_buffers, 0); 3031 atomic_set(&queue->set_pci_flags_count, 0); 3032 netdev_tx_reset_queue(netdev_get_tx_queue(card->dev, i)); 3033 } 3034 return 0; 3035 } 3036 3037 static void qeth_ipa_finalize_cmd(struct qeth_card *card, 3038 struct qeth_cmd_buffer *iob) 3039 { 3040 qeth_mpc_finalize_cmd(card, iob); 3041 3042 /* override with IPA-specific values: */ 3043 __ipa_cmd(iob)->hdr.seqno = card->seqno.ipa++; 3044 } 3045 3046 static void qeth_prepare_ipa_cmd(struct qeth_card *card, 3047 struct qeth_cmd_buffer *iob, u16 cmd_length) 3048 { 3049 u8 prot_type = qeth_mpc_select_prot_type(card); 3050 u16 total_length = iob->length; 3051 3052 qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, total_length, 3053 iob->data); 3054 iob->finalize = qeth_ipa_finalize_cmd; 3055 3056 memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE); 3057 memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &total_length, 2); 3058 memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1); 3059 memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &cmd_length, 2); 3060 memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &cmd_length, 2); 3061 memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data), 3062 &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH); 3063 memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &cmd_length, 2); 3064 } 3065 3066 static bool qeth_ipa_match_reply(struct qeth_cmd_buffer *iob, 3067 struct qeth_cmd_buffer *reply) 3068 { 3069 struct qeth_ipa_cmd *ipa_reply = __ipa_reply(reply); 3070 3071 return ipa_reply && (__ipa_cmd(iob)->hdr.seqno == ipa_reply->hdr.seqno); 3072 } 3073 3074 struct qeth_cmd_buffer *qeth_ipa_alloc_cmd(struct qeth_card *card, 3075 enum qeth_ipa_cmds cmd_code, 3076 enum qeth_prot_versions prot, 3077 unsigned int data_length) 3078 { 3079 struct qeth_cmd_buffer *iob; 3080 struct qeth_ipacmd_hdr *hdr; 3081 3082 data_length += offsetof(struct qeth_ipa_cmd, data); 3083 iob = qeth_alloc_cmd(&card->write, IPA_PDU_HEADER_SIZE + data_length, 1, 3084 QETH_IPA_TIMEOUT); 3085 if (!iob) 3086 return NULL; 3087 3088 qeth_prepare_ipa_cmd(card, iob, data_length); 3089 iob->match = qeth_ipa_match_reply; 3090 3091 hdr = &__ipa_cmd(iob)->hdr; 3092 hdr->command = cmd_code; 3093 hdr->initiator = IPA_CMD_INITIATOR_HOST; 3094 /* hdr->seqno is set by qeth_send_control_data() */ 3095 hdr->adapter_type = QETH_LINK_TYPE_FAST_ETH; 3096 hdr->rel_adapter_no = (u8) card->dev->dev_port; 3097 hdr->prim_version_no = IS_LAYER2(card) ? 2 : 1; 3098 hdr->param_count = 1; 3099 hdr->prot_version = prot; 3100 return iob; 3101 } 3102 EXPORT_SYMBOL_GPL(qeth_ipa_alloc_cmd); 3103 3104 static int qeth_send_ipa_cmd_cb(struct qeth_card *card, 3105 struct qeth_reply *reply, unsigned long data) 3106 { 3107 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; 3108 3109 return (cmd->hdr.return_code) ? -EIO : 0; 3110 } 3111 3112 /* 3113 * qeth_send_ipa_cmd() - send an IPA command 3114 * 3115 * See qeth_send_control_data() for explanation of the arguments. 3116 */ 3117 3118 int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob, 3119 int (*reply_cb)(struct qeth_card *, struct qeth_reply*, 3120 unsigned long), 3121 void *reply_param) 3122 { 3123 int rc; 3124 3125 QETH_CARD_TEXT(card, 4, "sendipa"); 3126 3127 if (card->read_or_write_problem) { 3128 qeth_put_cmd(iob); 3129 return -EIO; 3130 } 3131 3132 if (reply_cb == NULL) 3133 reply_cb = qeth_send_ipa_cmd_cb; 3134 rc = qeth_send_control_data(card, iob, reply_cb, reply_param); 3135 if (rc == -ETIME) { 3136 qeth_clear_ipacmd_list(card); 3137 qeth_schedule_recovery(card); 3138 } 3139 return rc; 3140 } 3141 EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd); 3142 3143 static int qeth_send_startlan_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 if (cmd->hdr.return_code == IPA_RC_LAN_OFFLINE) 3149 return -ENETDOWN; 3150 3151 return (cmd->hdr.return_code) ? -EIO : 0; 3152 } 3153 3154 static int qeth_send_startlan(struct qeth_card *card) 3155 { 3156 struct qeth_cmd_buffer *iob; 3157 3158 QETH_CARD_TEXT(card, 2, "strtlan"); 3159 3160 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_STARTLAN, QETH_PROT_NONE, 0); 3161 if (!iob) 3162 return -ENOMEM; 3163 return qeth_send_ipa_cmd(card, iob, qeth_send_startlan_cb, NULL); 3164 } 3165 3166 static int qeth_setadpparms_inspect_rc(struct qeth_ipa_cmd *cmd) 3167 { 3168 if (!cmd->hdr.return_code) 3169 cmd->hdr.return_code = 3170 cmd->data.setadapterparms.hdr.return_code; 3171 return cmd->hdr.return_code; 3172 } 3173 3174 static int qeth_query_setadapterparms_cb(struct qeth_card *card, 3175 struct qeth_reply *reply, unsigned long data) 3176 { 3177 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; 3178 struct qeth_query_cmds_supp *query_cmd; 3179 3180 QETH_CARD_TEXT(card, 3, "quyadpcb"); 3181 if (qeth_setadpparms_inspect_rc(cmd)) 3182 return -EIO; 3183 3184 query_cmd = &cmd->data.setadapterparms.data.query_cmds_supp; 3185 if (query_cmd->lan_type & 0x7f) { 3186 if (!qeth_is_supported_link_type(card, query_cmd->lan_type)) 3187 return -EPROTONOSUPPORT; 3188 3189 card->info.link_type = query_cmd->lan_type; 3190 QETH_CARD_TEXT_(card, 2, "lnk %d", card->info.link_type); 3191 } 3192 3193 card->options.adp.supported = query_cmd->supported_cmds; 3194 return 0; 3195 } 3196 3197 static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card, 3198 enum qeth_ipa_setadp_cmd adp_cmd, 3199 unsigned int data_length) 3200 { 3201 struct qeth_ipacmd_setadpparms_hdr *hdr; 3202 struct qeth_cmd_buffer *iob; 3203 3204 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETADAPTERPARMS, QETH_PROT_IPV4, 3205 data_length + 3206 offsetof(struct qeth_ipacmd_setadpparms, 3207 data)); 3208 if (!iob) 3209 return NULL; 3210 3211 hdr = &__ipa_cmd(iob)->data.setadapterparms.hdr; 3212 hdr->cmdlength = sizeof(*hdr) + data_length; 3213 hdr->command_code = adp_cmd; 3214 hdr->used_total = 1; 3215 hdr->seq_no = 1; 3216 return iob; 3217 } 3218 3219 static int qeth_query_setadapterparms(struct qeth_card *card) 3220 { 3221 int rc; 3222 struct qeth_cmd_buffer *iob; 3223 3224 QETH_CARD_TEXT(card, 3, "queryadp"); 3225 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_COMMANDS_SUPPORTED, 3226 SETADP_DATA_SIZEOF(query_cmds_supp)); 3227 if (!iob) 3228 return -ENOMEM; 3229 rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL); 3230 return rc; 3231 } 3232 3233 static int qeth_query_ipassists_cb(struct qeth_card *card, 3234 struct qeth_reply *reply, unsigned long data) 3235 { 3236 struct qeth_ipa_cmd *cmd; 3237 3238 QETH_CARD_TEXT(card, 2, "qipasscb"); 3239 3240 cmd = (struct qeth_ipa_cmd *) data; 3241 3242 switch (cmd->hdr.return_code) { 3243 case IPA_RC_SUCCESS: 3244 break; 3245 case IPA_RC_NOTSUPP: 3246 case IPA_RC_L2_UNSUPPORTED_CMD: 3247 QETH_CARD_TEXT(card, 2, "ipaunsup"); 3248 card->options.ipa4.supported |= IPA_SETADAPTERPARMS; 3249 card->options.ipa6.supported |= IPA_SETADAPTERPARMS; 3250 return -EOPNOTSUPP; 3251 default: 3252 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Unhandled rc=%#x\n", 3253 CARD_DEVID(card), cmd->hdr.return_code); 3254 return -EIO; 3255 } 3256 3257 if (cmd->hdr.prot_version == QETH_PROT_IPV4) 3258 card->options.ipa4 = cmd->hdr.assists; 3259 else if (cmd->hdr.prot_version == QETH_PROT_IPV6) 3260 card->options.ipa6 = cmd->hdr.assists; 3261 else 3262 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Flawed LIC detected\n", 3263 CARD_DEVID(card)); 3264 return 0; 3265 } 3266 3267 static int qeth_query_ipassists(struct qeth_card *card, 3268 enum qeth_prot_versions prot) 3269 { 3270 int rc; 3271 struct qeth_cmd_buffer *iob; 3272 3273 QETH_CARD_TEXT_(card, 2, "qipassi%i", prot); 3274 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_QIPASSIST, prot, 0); 3275 if (!iob) 3276 return -ENOMEM; 3277 rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL); 3278 return rc; 3279 } 3280 3281 static int qeth_query_switch_attributes_cb(struct qeth_card *card, 3282 struct qeth_reply *reply, unsigned long data) 3283 { 3284 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; 3285 struct qeth_query_switch_attributes *attrs; 3286 struct qeth_switch_info *sw_info; 3287 3288 QETH_CARD_TEXT(card, 2, "qswiatcb"); 3289 if (qeth_setadpparms_inspect_rc(cmd)) 3290 return -EIO; 3291 3292 sw_info = (struct qeth_switch_info *)reply->param; 3293 attrs = &cmd->data.setadapterparms.data.query_switch_attributes; 3294 sw_info->capabilities = attrs->capabilities; 3295 sw_info->settings = attrs->settings; 3296 QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities, 3297 sw_info->settings); 3298 return 0; 3299 } 3300 3301 int qeth_query_switch_attributes(struct qeth_card *card, 3302 struct qeth_switch_info *sw_info) 3303 { 3304 struct qeth_cmd_buffer *iob; 3305 3306 QETH_CARD_TEXT(card, 2, "qswiattr"); 3307 if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES)) 3308 return -EOPNOTSUPP; 3309 if (!netif_carrier_ok(card->dev)) 3310 return -ENOMEDIUM; 3311 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES, 0); 3312 if (!iob) 3313 return -ENOMEM; 3314 return qeth_send_ipa_cmd(card, iob, 3315 qeth_query_switch_attributes_cb, sw_info); 3316 } 3317 3318 struct qeth_cmd_buffer *qeth_get_diag_cmd(struct qeth_card *card, 3319 enum qeth_diags_cmds sub_cmd, 3320 unsigned int data_length) 3321 { 3322 struct qeth_ipacmd_diagass *cmd; 3323 struct qeth_cmd_buffer *iob; 3324 3325 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SET_DIAG_ASS, QETH_PROT_NONE, 3326 DIAG_HDR_LEN + data_length); 3327 if (!iob) 3328 return NULL; 3329 3330 cmd = &__ipa_cmd(iob)->data.diagass; 3331 cmd->subcmd_len = DIAG_SUB_HDR_LEN + data_length; 3332 cmd->subcmd = sub_cmd; 3333 return iob; 3334 } 3335 EXPORT_SYMBOL_GPL(qeth_get_diag_cmd); 3336 3337 static int qeth_query_setdiagass_cb(struct qeth_card *card, 3338 struct qeth_reply *reply, unsigned long data) 3339 { 3340 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; 3341 u16 rc = cmd->hdr.return_code; 3342 3343 if (rc) { 3344 QETH_CARD_TEXT_(card, 2, "diagq:%x", rc); 3345 return -EIO; 3346 } 3347 3348 card->info.diagass_support = cmd->data.diagass.ext; 3349 return 0; 3350 } 3351 3352 static int qeth_query_setdiagass(struct qeth_card *card) 3353 { 3354 struct qeth_cmd_buffer *iob; 3355 3356 QETH_CARD_TEXT(card, 2, "qdiagass"); 3357 iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_QUERY, 0); 3358 if (!iob) 3359 return -ENOMEM; 3360 return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL); 3361 } 3362 3363 static void qeth_get_trap_id(struct qeth_card *card, struct qeth_trap_id *tid) 3364 { 3365 unsigned long info = get_zeroed_page(GFP_KERNEL); 3366 struct sysinfo_2_2_2 *info222 = (struct sysinfo_2_2_2 *)info; 3367 struct sysinfo_3_2_2 *info322 = (struct sysinfo_3_2_2 *)info; 3368 struct ccw_dev_id ccwid; 3369 int level; 3370 3371 tid->chpid = card->info.chpid; 3372 ccw_device_get_id(CARD_RDEV(card), &ccwid); 3373 tid->ssid = ccwid.ssid; 3374 tid->devno = ccwid.devno; 3375 if (!info) 3376 return; 3377 level = stsi(NULL, 0, 0, 0); 3378 if ((level >= 2) && (stsi(info222, 2, 2, 2) == 0)) 3379 tid->lparnr = info222->lpar_number; 3380 if ((level >= 3) && (stsi(info322, 3, 2, 2) == 0)) { 3381 EBCASC(info322->vm[0].name, sizeof(info322->vm[0].name)); 3382 memcpy(tid->vmname, info322->vm[0].name, sizeof(tid->vmname)); 3383 } 3384 free_page(info); 3385 } 3386 3387 static int qeth_hw_trap_cb(struct qeth_card *card, 3388 struct qeth_reply *reply, unsigned long data) 3389 { 3390 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; 3391 u16 rc = cmd->hdr.return_code; 3392 3393 if (rc) { 3394 QETH_CARD_TEXT_(card, 2, "trapc:%x", rc); 3395 return -EIO; 3396 } 3397 return 0; 3398 } 3399 3400 int qeth_hw_trap(struct qeth_card *card, enum qeth_diags_trap_action action) 3401 { 3402 struct qeth_cmd_buffer *iob; 3403 struct qeth_ipa_cmd *cmd; 3404 3405 QETH_CARD_TEXT(card, 2, "diagtrap"); 3406 iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_TRAP, 64); 3407 if (!iob) 3408 return -ENOMEM; 3409 cmd = __ipa_cmd(iob); 3410 cmd->data.diagass.type = 1; 3411 cmd->data.diagass.action = action; 3412 switch (action) { 3413 case QETH_DIAGS_TRAP_ARM: 3414 cmd->data.diagass.options = 0x0003; 3415 cmd->data.diagass.ext = 0x00010000 + 3416 sizeof(struct qeth_trap_id); 3417 qeth_get_trap_id(card, 3418 (struct qeth_trap_id *)cmd->data.diagass.cdata); 3419 break; 3420 case QETH_DIAGS_TRAP_DISARM: 3421 cmd->data.diagass.options = 0x0001; 3422 break; 3423 case QETH_DIAGS_TRAP_CAPTURE: 3424 break; 3425 } 3426 return qeth_send_ipa_cmd(card, iob, qeth_hw_trap_cb, NULL); 3427 } 3428 3429 static int qeth_check_qdio_errors(struct qeth_card *card, 3430 struct qdio_buffer *buf, 3431 unsigned int qdio_error, 3432 const char *dbftext) 3433 { 3434 if (qdio_error) { 3435 QETH_CARD_TEXT(card, 2, dbftext); 3436 QETH_CARD_TEXT_(card, 2, " F15=%02X", 3437 buf->element[15].sflags); 3438 QETH_CARD_TEXT_(card, 2, " F14=%02X", 3439 buf->element[14].sflags); 3440 QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error); 3441 if ((buf->element[15].sflags) == 0x12) { 3442 QETH_CARD_STAT_INC(card, rx_fifo_errors); 3443 return 0; 3444 } else 3445 return 1; 3446 } 3447 return 0; 3448 } 3449 3450 static unsigned int qeth_rx_refill_queue(struct qeth_card *card, 3451 unsigned int count) 3452 { 3453 struct qeth_qdio_q *queue = card->qdio.in_q; 3454 struct list_head *lh; 3455 int i; 3456 int rc; 3457 int newcount = 0; 3458 3459 /* only requeue at a certain threshold to avoid SIGAs */ 3460 if (count >= QETH_IN_BUF_REQUEUE_THRESHOLD(card)) { 3461 for (i = queue->next_buf_to_init; 3462 i < queue->next_buf_to_init + count; ++i) { 3463 if (qeth_init_input_buffer(card, 3464 &queue->bufs[QDIO_BUFNR(i)])) { 3465 break; 3466 } else { 3467 newcount++; 3468 } 3469 } 3470 3471 if (newcount < count) { 3472 /* we are in memory shortage so we switch back to 3473 traditional skb allocation and drop packages */ 3474 atomic_set(&card->force_alloc_skb, 3); 3475 count = newcount; 3476 } else { 3477 atomic_add_unless(&card->force_alloc_skb, -1, 0); 3478 } 3479 3480 if (!count) { 3481 i = 0; 3482 list_for_each(lh, &card->qdio.in_buf_pool.entry_list) 3483 i++; 3484 if (i == card->qdio.in_buf_pool.buf_count) { 3485 QETH_CARD_TEXT(card, 2, "qsarbw"); 3486 schedule_delayed_work( 3487 &card->buffer_reclaim_work, 3488 QETH_RECLAIM_WORK_TIME); 3489 } 3490 return 0; 3491 } 3492 3493 rc = qdio_add_bufs_to_input_queue(CARD_DDEV(card), 0, 3494 queue->next_buf_to_init, 3495 count); 3496 if (rc) { 3497 QETH_CARD_TEXT(card, 2, "qinberr"); 3498 } 3499 queue->next_buf_to_init = QDIO_BUFNR(queue->next_buf_to_init + 3500 count); 3501 return count; 3502 } 3503 3504 return 0; 3505 } 3506 3507 static void qeth_buffer_reclaim_work(struct work_struct *work) 3508 { 3509 struct qeth_card *card = container_of(to_delayed_work(work), 3510 struct qeth_card, 3511 buffer_reclaim_work); 3512 3513 local_bh_disable(); 3514 napi_schedule(&card->napi); 3515 /* kick-start the NAPI softirq: */ 3516 local_bh_enable(); 3517 } 3518 3519 static void qeth_handle_send_error(struct qeth_card *card, 3520 struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err) 3521 { 3522 int sbalf15 = buffer->buffer->element[15].sflags; 3523 3524 QETH_CARD_TEXT(card, 6, "hdsnderr"); 3525 qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr"); 3526 3527 if (!qdio_err) 3528 return; 3529 3530 if ((sbalf15 >= 15) && (sbalf15 <= 31)) 3531 return; 3532 3533 QETH_CARD_TEXT(card, 1, "lnkfail"); 3534 QETH_CARD_TEXT_(card, 1, "%04x %02x", 3535 (u16)qdio_err, (u8)sbalf15); 3536 } 3537 3538 /** 3539 * qeth_prep_flush_pack_buffer - Prepares flushing of a packing buffer. 3540 * @queue: queue to check for packing buffer 3541 * 3542 * Returns number of buffers that were prepared for flush. 3543 */ 3544 static int qeth_prep_flush_pack_buffer(struct qeth_qdio_out_q *queue) 3545 { 3546 struct qeth_qdio_out_buffer *buffer; 3547 3548 buffer = queue->bufs[queue->next_buf_to_fill]; 3549 if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) && 3550 (buffer->next_element_to_fill > 0)) { 3551 /* it's a packing buffer */ 3552 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED); 3553 queue->next_buf_to_fill = 3554 QDIO_BUFNR(queue->next_buf_to_fill + 1); 3555 return 1; 3556 } 3557 return 0; 3558 } 3559 3560 /* 3561 * Switched to packing state if the number of used buffers on a queue 3562 * reaches a certain limit. 3563 */ 3564 static void qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q *queue) 3565 { 3566 if (!queue->do_pack) { 3567 if (atomic_read(&queue->used_buffers) 3568 >= QETH_HIGH_WATERMARK_PACK){ 3569 /* switch non-PACKING -> PACKING */ 3570 QETH_CARD_TEXT(queue->card, 6, "np->pack"); 3571 QETH_TXQ_STAT_INC(queue, packing_mode_switch); 3572 queue->do_pack = 1; 3573 } 3574 } 3575 } 3576 3577 /* 3578 * Switches from packing to non-packing mode. If there is a packing 3579 * buffer on the queue this buffer will be prepared to be flushed. 3580 * In that case 1 is returned to inform the caller. If no buffer 3581 * has to be flushed, zero is returned. 3582 */ 3583 static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue) 3584 { 3585 if (queue->do_pack) { 3586 if (atomic_read(&queue->used_buffers) 3587 <= QETH_LOW_WATERMARK_PACK) { 3588 /* switch PACKING -> non-PACKING */ 3589 QETH_CARD_TEXT(queue->card, 6, "pack->np"); 3590 QETH_TXQ_STAT_INC(queue, packing_mode_switch); 3591 queue->do_pack = 0; 3592 return qeth_prep_flush_pack_buffer(queue); 3593 } 3594 } 3595 return 0; 3596 } 3597 3598 static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index, 3599 int count) 3600 { 3601 struct qeth_qdio_out_buffer *buf = queue->bufs[index]; 3602 struct qeth_card *card = queue->card; 3603 unsigned int frames, usecs; 3604 struct qaob *aob = NULL; 3605 int rc; 3606 int i; 3607 3608 for (i = index; i < index + count; ++i) { 3609 unsigned int bidx = QDIO_BUFNR(i); 3610 struct sk_buff *skb; 3611 3612 buf = queue->bufs[bidx]; 3613 buf->buffer->element[buf->next_element_to_fill - 1].eflags |= 3614 SBAL_EFLAGS_LAST_ENTRY; 3615 queue->coalesced_frames += buf->frames; 3616 3617 if (IS_IQD(card)) { 3618 skb_queue_walk(&buf->skb_list, skb) 3619 skb_tx_timestamp(skb); 3620 } 3621 } 3622 3623 if (IS_IQD(card)) { 3624 if (card->options.cq == QETH_CQ_ENABLED && 3625 !qeth_iqd_is_mcast_queue(card, queue) && 3626 count == 1) { 3627 if (!buf->aob) 3628 buf->aob = kmem_cache_zalloc(qeth_qaob_cache, 3629 GFP_ATOMIC); 3630 if (buf->aob) { 3631 struct qeth_qaob_priv1 *priv; 3632 3633 aob = buf->aob; 3634 priv = (struct qeth_qaob_priv1 *)&aob->user1; 3635 priv->state = QETH_QAOB_ISSUED; 3636 priv->queue_no = queue->queue_no; 3637 } 3638 } 3639 } else { 3640 if (!queue->do_pack) { 3641 if ((atomic_read(&queue->used_buffers) >= 3642 (QETH_HIGH_WATERMARK_PACK - 3643 QETH_WATERMARK_PACK_FUZZ)) && 3644 !atomic_read(&queue->set_pci_flags_count)) { 3645 /* it's likely that we'll go to packing 3646 * mode soon */ 3647 atomic_inc(&queue->set_pci_flags_count); 3648 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ; 3649 } 3650 } else { 3651 if (!atomic_read(&queue->set_pci_flags_count)) { 3652 /* 3653 * there's no outstanding PCI any more, so we 3654 * have to request a PCI to be sure the PCI 3655 * will wake at some time in the future then we 3656 * can flush packed buffers that might still be 3657 * hanging around, which can happen if no 3658 * further send was requested by the stack 3659 */ 3660 atomic_inc(&queue->set_pci_flags_count); 3661 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ; 3662 } 3663 } 3664 } 3665 3666 QETH_TXQ_STAT_INC(queue, doorbell); 3667 rc = qdio_add_bufs_to_output_queue(CARD_DDEV(card), queue->queue_no, 3668 index, count, aob); 3669 3670 switch (rc) { 3671 case 0: 3672 case -ENOBUFS: 3673 /* ignore temporary SIGA errors without busy condition */ 3674 3675 /* Fake the TX completion interrupt: */ 3676 frames = READ_ONCE(queue->max_coalesced_frames); 3677 usecs = READ_ONCE(queue->coalesce_usecs); 3678 3679 if (frames && queue->coalesced_frames >= frames) { 3680 napi_schedule(&queue->napi); 3681 queue->coalesced_frames = 0; 3682 QETH_TXQ_STAT_INC(queue, coal_frames); 3683 } else if (qeth_use_tx_irqs(card) && 3684 atomic_read(&queue->used_buffers) >= 32) { 3685 /* Old behaviour carried over from the qdio layer: */ 3686 napi_schedule(&queue->napi); 3687 QETH_TXQ_STAT_INC(queue, coal_frames); 3688 } else if (usecs) { 3689 qeth_tx_arm_timer(queue, usecs); 3690 } 3691 3692 break; 3693 default: 3694 QETH_CARD_TEXT(queue->card, 2, "flushbuf"); 3695 QETH_CARD_TEXT_(queue->card, 2, " q%d", queue->queue_no); 3696 QETH_CARD_TEXT_(queue->card, 2, " idx%d", index); 3697 QETH_CARD_TEXT_(queue->card, 2, " c%d", count); 3698 QETH_CARD_TEXT_(queue->card, 2, " err%d", rc); 3699 3700 /* this must not happen under normal circumstances. if it 3701 * happens something is really wrong -> recover */ 3702 qeth_schedule_recovery(queue->card); 3703 } 3704 } 3705 3706 static void qeth_flush_queue(struct qeth_qdio_out_q *queue) 3707 { 3708 qeth_flush_buffers(queue, queue->bulk_start, queue->bulk_count); 3709 3710 queue->bulk_start = QDIO_BUFNR(queue->bulk_start + queue->bulk_count); 3711 queue->prev_hdr = NULL; 3712 queue->bulk_count = 0; 3713 } 3714 3715 static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue) 3716 { 3717 /* 3718 * check if we have to switch to non-packing mode or if 3719 * we have to get a pci flag out on the queue 3720 */ 3721 if ((atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) || 3722 !atomic_read(&queue->set_pci_flags_count)) { 3723 unsigned int index, flush_cnt; 3724 3725 spin_lock(&queue->lock); 3726 3727 index = queue->next_buf_to_fill; 3728 3729 flush_cnt = qeth_switch_to_nonpacking_if_needed(queue); 3730 if (!flush_cnt && !atomic_read(&queue->set_pci_flags_count)) 3731 flush_cnt = qeth_prep_flush_pack_buffer(queue); 3732 3733 if (flush_cnt) { 3734 qeth_flush_buffers(queue, index, flush_cnt); 3735 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_cnt); 3736 } 3737 3738 spin_unlock(&queue->lock); 3739 } 3740 } 3741 3742 static void qeth_qdio_poll(struct ccw_device *cdev, unsigned long card_ptr) 3743 { 3744 struct qeth_card *card = (struct qeth_card *)card_ptr; 3745 3746 napi_schedule_irqoff(&card->napi); 3747 } 3748 3749 int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq) 3750 { 3751 if (card->options.cq == QETH_CQ_NOTAVAILABLE) 3752 return -1; 3753 3754 card->options.cq = cq; 3755 return 0; 3756 } 3757 EXPORT_SYMBOL_GPL(qeth_configure_cq); 3758 3759 static void qeth_qdio_handle_aob(struct qeth_card *card, struct qaob *aob) 3760 { 3761 struct qeth_qaob_priv1 *priv = (struct qeth_qaob_priv1 *)&aob->user1; 3762 unsigned int queue_no = priv->queue_no; 3763 3764 BUILD_BUG_ON(sizeof(*priv) > ARRAY_SIZE(aob->user1)); 3765 3766 if (xchg(&priv->state, QETH_QAOB_DONE) == QETH_QAOB_PENDING && 3767 queue_no < card->qdio.no_out_queues) 3768 napi_schedule(&card->qdio.out_qs[queue_no]->napi); 3769 } 3770 3771 static void qeth_qdio_cq_handler(struct qeth_card *card, unsigned int qdio_err, 3772 unsigned int queue, int first_element, 3773 int count) 3774 { 3775 struct qeth_qdio_q *cq = card->qdio.c_q; 3776 int i; 3777 int rc; 3778 3779 QETH_CARD_TEXT_(card, 5, "qcqhe%d", first_element); 3780 QETH_CARD_TEXT_(card, 5, "qcqhc%d", count); 3781 QETH_CARD_TEXT_(card, 5, "qcqherr%d", qdio_err); 3782 3783 if (qdio_err) { 3784 netif_tx_stop_all_queues(card->dev); 3785 qeth_schedule_recovery(card); 3786 return; 3787 } 3788 3789 for (i = first_element; i < first_element + count; ++i) { 3790 struct qdio_buffer *buffer = cq->qdio_bufs[QDIO_BUFNR(i)]; 3791 int e = 0; 3792 3793 while ((e < QDIO_MAX_ELEMENTS_PER_BUFFER) && 3794 buffer->element[e].addr) { 3795 dma64_t phys_aob_addr = buffer->element[e].addr; 3796 3797 qeth_qdio_handle_aob(card, dma64_to_virt(phys_aob_addr)); 3798 ++e; 3799 } 3800 qeth_scrub_qdio_buffer(buffer, QDIO_MAX_ELEMENTS_PER_BUFFER); 3801 } 3802 rc = qdio_add_bufs_to_input_queue(CARD_DDEV(card), queue, 3803 cq->next_buf_to_init, count); 3804 if (rc) { 3805 dev_warn(&card->gdev->dev, 3806 "QDIO reported an error, rc=%i\n", rc); 3807 QETH_CARD_TEXT(card, 2, "qcqherr"); 3808 } 3809 3810 cq->next_buf_to_init = QDIO_BUFNR(cq->next_buf_to_init + count); 3811 } 3812 3813 static void qeth_qdio_input_handler(struct ccw_device *ccwdev, 3814 unsigned int qdio_err, int queue, 3815 int first_elem, int count, 3816 unsigned long card_ptr) 3817 { 3818 struct qeth_card *card = (struct qeth_card *)card_ptr; 3819 3820 QETH_CARD_TEXT_(card, 2, "qihq%d", queue); 3821 QETH_CARD_TEXT_(card, 2, "qiec%d", qdio_err); 3822 3823 if (qdio_err) 3824 qeth_schedule_recovery(card); 3825 } 3826 3827 static void qeth_qdio_output_handler(struct ccw_device *ccwdev, 3828 unsigned int qdio_error, int __queue, 3829 int first_element, int count, 3830 unsigned long card_ptr) 3831 { 3832 struct qeth_card *card = (struct qeth_card *) card_ptr; 3833 3834 QETH_CARD_TEXT(card, 2, "achkcond"); 3835 netif_tx_stop_all_queues(card->dev); 3836 qeth_schedule_recovery(card); 3837 } 3838 3839 /* 3840 * Note: Function assumes that we have 4 outbound queues. 3841 */ 3842 static int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb) 3843 { 3844 struct vlan_ethhdr *veth = vlan_eth_hdr(skb); 3845 u8 tos; 3846 3847 switch (card->qdio.do_prio_queueing) { 3848 case QETH_PRIO_Q_ING_TOS: 3849 case QETH_PRIO_Q_ING_PREC: 3850 switch (vlan_get_protocol(skb)) { 3851 case htons(ETH_P_IP): 3852 tos = ipv4_get_dsfield(ip_hdr(skb)); 3853 break; 3854 case htons(ETH_P_IPV6): 3855 tos = ipv6_get_dsfield(ipv6_hdr(skb)); 3856 break; 3857 default: 3858 return card->qdio.default_out_queue; 3859 } 3860 if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC) 3861 return ~tos >> 6 & 3; 3862 if (tos & IPTOS_MINCOST) 3863 return 3; 3864 if (tos & IPTOS_RELIABILITY) 3865 return 2; 3866 if (tos & IPTOS_THROUGHPUT) 3867 return 1; 3868 if (tos & IPTOS_LOWDELAY) 3869 return 0; 3870 break; 3871 case QETH_PRIO_Q_ING_SKB: 3872 if (skb->priority > 5) 3873 return 0; 3874 return ~skb->priority >> 1 & 3; 3875 case QETH_PRIO_Q_ING_VLAN: 3876 if (veth->h_vlan_proto == htons(ETH_P_8021Q)) 3877 return ~ntohs(veth->h_vlan_TCI) >> 3878 (VLAN_PRIO_SHIFT + 1) & 3; 3879 break; 3880 case QETH_PRIO_Q_ING_FIXED: 3881 return card->qdio.default_out_queue; 3882 default: 3883 break; 3884 } 3885 return card->qdio.default_out_queue; 3886 } 3887 3888 /** 3889 * qeth_get_elements_for_frags() - find number of SBALEs for skb frags. 3890 * @skb: SKB address 3891 * 3892 * Returns the number of pages, and thus QDIO buffer elements, needed to cover 3893 * fragmented part of the SKB. Returns zero for linear SKB. 3894 */ 3895 static int qeth_get_elements_for_frags(struct sk_buff *skb) 3896 { 3897 int cnt, elements = 0; 3898 3899 for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) { 3900 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt]; 3901 3902 elements += qeth_get_elements_for_range( 3903 (addr_t)skb_frag_address(frag), 3904 (addr_t)skb_frag_address(frag) + skb_frag_size(frag)); 3905 } 3906 return elements; 3907 } 3908 3909 /** 3910 * qeth_count_elements() - Counts the number of QDIO buffer elements needed 3911 * to transmit an skb. 3912 * @skb: the skb to operate on. 3913 * @data_offset: skip this part of the skb's linear data 3914 * 3915 * Returns the number of pages, and thus QDIO buffer elements, needed to map the 3916 * skb's data (both its linear part and paged fragments). 3917 */ 3918 static unsigned int qeth_count_elements(struct sk_buff *skb, 3919 unsigned int data_offset) 3920 { 3921 unsigned int elements = qeth_get_elements_for_frags(skb); 3922 addr_t end = (addr_t)skb->data + skb_headlen(skb); 3923 addr_t start = (addr_t)skb->data + data_offset; 3924 3925 if (start != end) 3926 elements += qeth_get_elements_for_range(start, end); 3927 return elements; 3928 } 3929 3930 #define QETH_HDR_CACHE_OBJ_SIZE (sizeof(struct qeth_hdr_tso) + \ 3931 MAX_TCP_HEADER) 3932 3933 /** 3934 * qeth_add_hw_header() - add a HW header to an skb. 3935 * @queue: TX queue that the skb will be placed on. 3936 * @skb: skb that the HW header should be added to. 3937 * @hdr: double pointer to a qeth_hdr. When returning with >= 0, 3938 * it contains a valid pointer to a qeth_hdr. 3939 * @hdr_len: length of the HW header. 3940 * @proto_len: length of protocol headers that need to be in same page as the 3941 * HW header. 3942 * @elements: returns the required number of buffer elements for this skb. 3943 * 3944 * Returns the pushed length. If the header can't be pushed on 3945 * (eg. because it would cross a page boundary), it is allocated from 3946 * the cache instead and 0 is returned. 3947 * The number of needed buffer elements is returned in @elements. 3948 * Error to create the hdr is indicated by returning with < 0. 3949 */ 3950 static int qeth_add_hw_header(struct qeth_qdio_out_q *queue, 3951 struct sk_buff *skb, struct qeth_hdr **hdr, 3952 unsigned int hdr_len, unsigned int proto_len, 3953 unsigned int *elements) 3954 { 3955 gfp_t gfp = GFP_ATOMIC | (skb_pfmemalloc(skb) ? __GFP_MEMALLOC : 0); 3956 const unsigned int contiguous = proto_len ? proto_len : 1; 3957 const unsigned int max_elements = queue->max_elements; 3958 unsigned int __elements; 3959 addr_t start, end; 3960 bool push_ok; 3961 int rc; 3962 3963 check_layout: 3964 start = (addr_t)skb->data - hdr_len; 3965 end = (addr_t)skb->data; 3966 3967 if (qeth_get_elements_for_range(start, end + contiguous) == 1) { 3968 /* Push HW header into same page as first protocol header. */ 3969 push_ok = true; 3970 /* ... but TSO always needs a separate element for headers: */ 3971 if (skb_is_gso(skb)) 3972 __elements = 1 + qeth_count_elements(skb, proto_len); 3973 else 3974 __elements = qeth_count_elements(skb, 0); 3975 } else if (!proto_len && PAGE_ALIGNED(skb->data)) { 3976 /* Push HW header into preceding page, flush with skb->data. */ 3977 push_ok = true; 3978 __elements = 1 + qeth_count_elements(skb, 0); 3979 } else { 3980 /* Use header cache, copy protocol headers up. */ 3981 push_ok = false; 3982 __elements = 1 + qeth_count_elements(skb, proto_len); 3983 } 3984 3985 /* Compress skb to fit into one IO buffer: */ 3986 if (__elements > max_elements) { 3987 if (!skb_is_nonlinear(skb)) { 3988 /* Drop it, no easy way of shrinking it further. */ 3989 QETH_DBF_MESSAGE(2, "Dropped an oversized skb (Max Elements=%u / Actual=%u / Length=%u).\n", 3990 max_elements, __elements, skb->len); 3991 return -E2BIG; 3992 } 3993 3994 rc = skb_linearize(skb); 3995 if (rc) { 3996 QETH_TXQ_STAT_INC(queue, skbs_linearized_fail); 3997 return rc; 3998 } 3999 4000 QETH_TXQ_STAT_INC(queue, skbs_linearized); 4001 /* Linearization changed the layout, re-evaluate: */ 4002 goto check_layout; 4003 } 4004 4005 *elements = __elements; 4006 /* Add the header: */ 4007 if (push_ok) { 4008 *hdr = skb_push(skb, hdr_len); 4009 return hdr_len; 4010 } 4011 4012 /* Fall back to cache element with known-good alignment: */ 4013 if (hdr_len + proto_len > QETH_HDR_CACHE_OBJ_SIZE) 4014 return -E2BIG; 4015 *hdr = kmem_cache_alloc(qeth_core_header_cache, gfp); 4016 if (!*hdr) 4017 return -ENOMEM; 4018 /* Copy protocol headers behind HW header: */ 4019 skb_copy_from_linear_data(skb, ((char *)*hdr) + hdr_len, proto_len); 4020 return 0; 4021 } 4022 4023 static bool qeth_iqd_may_bulk(struct qeth_qdio_out_q *queue, 4024 struct sk_buff *curr_skb, 4025 struct qeth_hdr *curr_hdr) 4026 { 4027 struct qeth_qdio_out_buffer *buffer = queue->bufs[queue->bulk_start]; 4028 struct qeth_hdr *prev_hdr = queue->prev_hdr; 4029 4030 if (!prev_hdr) 4031 return true; 4032 4033 /* All packets must have the same target: */ 4034 if (curr_hdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER2) { 4035 struct sk_buff *prev_skb = skb_peek(&buffer->skb_list); 4036 4037 return ether_addr_equal(eth_hdr(prev_skb)->h_dest, 4038 eth_hdr(curr_skb)->h_dest) && 4039 qeth_l2_same_vlan(&prev_hdr->hdr.l2, &curr_hdr->hdr.l2); 4040 } 4041 4042 return qeth_l3_same_next_hop(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3) && 4043 qeth_l3_iqd_same_vlan(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3); 4044 } 4045 4046 /** 4047 * qeth_fill_buffer() - map skb into an output buffer 4048 * @buf: buffer to transport the skb 4049 * @skb: skb to map into the buffer 4050 * @hdr: qeth_hdr for this skb. Either at skb->data, or allocated 4051 * from qeth_core_header_cache. 4052 * @offset: when mapping the skb, start at skb->data + offset 4053 * @hd_len: if > 0, build a dedicated header element of this size 4054 */ 4055 static unsigned int qeth_fill_buffer(struct qeth_qdio_out_buffer *buf, 4056 struct sk_buff *skb, struct qeth_hdr *hdr, 4057 unsigned int offset, unsigned int hd_len) 4058 { 4059 struct qdio_buffer *buffer = buf->buffer; 4060 int element = buf->next_element_to_fill; 4061 int length = skb_headlen(skb) - offset; 4062 char *data = skb->data + offset; 4063 unsigned int elem_length, cnt; 4064 bool is_first_elem = true; 4065 4066 __skb_queue_tail(&buf->skb_list, skb); 4067 4068 /* build dedicated element for HW Header */ 4069 if (hd_len) { 4070 is_first_elem = false; 4071 4072 buffer->element[element].addr = virt_to_dma64(hdr); 4073 buffer->element[element].length = hd_len; 4074 buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG; 4075 4076 /* HW header is allocated from cache: */ 4077 if ((void *)hdr != skb->data) 4078 __set_bit(element, buf->from_kmem_cache); 4079 /* HW header was pushed and is contiguous with linear part: */ 4080 else if (length > 0 && !PAGE_ALIGNED(data) && 4081 (data == (char *)hdr + hd_len)) 4082 buffer->element[element].eflags |= 4083 SBAL_EFLAGS_CONTIGUOUS; 4084 4085 element++; 4086 } 4087 4088 /* map linear part into buffer element(s) */ 4089 while (length > 0) { 4090 elem_length = min_t(unsigned int, length, 4091 PAGE_SIZE - offset_in_page(data)); 4092 4093 buffer->element[element].addr = virt_to_dma64(data); 4094 buffer->element[element].length = elem_length; 4095 length -= elem_length; 4096 if (is_first_elem) { 4097 is_first_elem = false; 4098 if (length || skb_is_nonlinear(skb)) 4099 /* skb needs additional elements */ 4100 buffer->element[element].eflags = 4101 SBAL_EFLAGS_FIRST_FRAG; 4102 else 4103 buffer->element[element].eflags = 0; 4104 } else { 4105 buffer->element[element].eflags = 4106 SBAL_EFLAGS_MIDDLE_FRAG; 4107 } 4108 4109 data += elem_length; 4110 element++; 4111 } 4112 4113 /* map page frags into buffer element(s) */ 4114 for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) { 4115 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt]; 4116 4117 data = skb_frag_address(frag); 4118 length = skb_frag_size(frag); 4119 while (length > 0) { 4120 elem_length = min_t(unsigned int, length, 4121 PAGE_SIZE - offset_in_page(data)); 4122 4123 buffer->element[element].addr = virt_to_dma64(data); 4124 buffer->element[element].length = elem_length; 4125 buffer->element[element].eflags = 4126 SBAL_EFLAGS_MIDDLE_FRAG; 4127 4128 length -= elem_length; 4129 data += elem_length; 4130 element++; 4131 } 4132 } 4133 4134 if (buffer->element[element - 1].eflags) 4135 buffer->element[element - 1].eflags = SBAL_EFLAGS_LAST_FRAG; 4136 buf->next_element_to_fill = element; 4137 return element; 4138 } 4139 4140 static int __qeth_xmit(struct qeth_card *card, struct qeth_qdio_out_q *queue, 4141 struct sk_buff *skb, unsigned int elements, 4142 struct qeth_hdr *hdr, unsigned int offset, 4143 unsigned int hd_len) 4144 { 4145 unsigned int bytes = qdisc_pkt_len(skb); 4146 struct qeth_qdio_out_buffer *buffer; 4147 unsigned int next_element; 4148 struct netdev_queue *txq; 4149 bool stopped = false; 4150 bool flush; 4151 4152 buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start + queue->bulk_count)]; 4153 txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb)); 4154 4155 /* Just a sanity check, the wake/stop logic should ensure that we always 4156 * get a free buffer. 4157 */ 4158 if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY) 4159 return -EBUSY; 4160 4161 flush = !qeth_iqd_may_bulk(queue, skb, hdr); 4162 4163 if (flush || 4164 (buffer->next_element_to_fill + elements > queue->max_elements)) { 4165 if (buffer->next_element_to_fill > 0) { 4166 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED); 4167 queue->bulk_count++; 4168 } 4169 4170 if (queue->bulk_count >= queue->bulk_max) 4171 flush = true; 4172 4173 if (flush) 4174 qeth_flush_queue(queue); 4175 4176 buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start + 4177 queue->bulk_count)]; 4178 4179 /* Sanity-check again: */ 4180 if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY) 4181 return -EBUSY; 4182 } 4183 4184 if (buffer->next_element_to_fill == 0 && 4185 atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) { 4186 /* If a TX completion happens right _here_ and misses to wake 4187 * the txq, then our re-check below will catch the race. 4188 */ 4189 QETH_TXQ_STAT_INC(queue, stopped); 4190 netif_tx_stop_queue(txq); 4191 stopped = true; 4192 } 4193 4194 next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len); 4195 buffer->bytes += bytes; 4196 buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1; 4197 queue->prev_hdr = hdr; 4198 4199 flush = __netdev_tx_sent_queue(txq, bytes, 4200 !stopped && netdev_xmit_more()); 4201 4202 if (flush || next_element >= queue->max_elements) { 4203 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED); 4204 queue->bulk_count++; 4205 4206 if (queue->bulk_count >= queue->bulk_max) 4207 flush = true; 4208 4209 if (flush) 4210 qeth_flush_queue(queue); 4211 } 4212 4213 if (stopped && !qeth_out_queue_is_full(queue)) 4214 netif_tx_start_queue(txq); 4215 return 0; 4216 } 4217 4218 static int qeth_do_send_packet(struct qeth_card *card, 4219 struct qeth_qdio_out_q *queue, 4220 struct sk_buff *skb, struct qeth_hdr *hdr, 4221 unsigned int offset, unsigned int hd_len, 4222 unsigned int elements_needed) 4223 { 4224 unsigned int start_index = queue->next_buf_to_fill; 4225 struct qeth_qdio_out_buffer *buffer; 4226 unsigned int next_element; 4227 struct netdev_queue *txq; 4228 bool stopped = false; 4229 int flush_count = 0; 4230 int do_pack = 0; 4231 int rc = 0; 4232 4233 buffer = queue->bufs[queue->next_buf_to_fill]; 4234 4235 /* Just a sanity check, the wake/stop logic should ensure that we always 4236 * get a free buffer. 4237 */ 4238 if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY) 4239 return -EBUSY; 4240 4241 txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb)); 4242 4243 /* check if we need to switch packing state of this queue */ 4244 qeth_switch_to_packing_if_needed(queue); 4245 if (queue->do_pack) { 4246 do_pack = 1; 4247 /* does packet fit in current buffer? */ 4248 if (buffer->next_element_to_fill + elements_needed > 4249 queue->max_elements) { 4250 /* ... no -> set state PRIMED */ 4251 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED); 4252 flush_count++; 4253 queue->next_buf_to_fill = 4254 QDIO_BUFNR(queue->next_buf_to_fill + 1); 4255 buffer = queue->bufs[queue->next_buf_to_fill]; 4256 4257 /* We stepped forward, so sanity-check again: */ 4258 if (atomic_read(&buffer->state) != 4259 QETH_QDIO_BUF_EMPTY) { 4260 qeth_flush_buffers(queue, start_index, 4261 flush_count); 4262 rc = -EBUSY; 4263 goto out; 4264 } 4265 } 4266 } 4267 4268 if (buffer->next_element_to_fill == 0 && 4269 atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) { 4270 /* If a TX completion happens right _here_ and misses to wake 4271 * the txq, then our re-check below will catch the race. 4272 */ 4273 QETH_TXQ_STAT_INC(queue, stopped); 4274 netif_tx_stop_queue(txq); 4275 stopped = true; 4276 } 4277 4278 next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len); 4279 buffer->bytes += qdisc_pkt_len(skb); 4280 buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1; 4281 4282 if (queue->do_pack) 4283 QETH_TXQ_STAT_INC(queue, skbs_pack); 4284 if (!queue->do_pack || stopped || next_element >= queue->max_elements) { 4285 flush_count++; 4286 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED); 4287 queue->next_buf_to_fill = 4288 QDIO_BUFNR(queue->next_buf_to_fill + 1); 4289 } 4290 4291 if (flush_count) 4292 qeth_flush_buffers(queue, start_index, flush_count); 4293 4294 out: 4295 if (do_pack) 4296 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_count); 4297 4298 if (stopped && !qeth_out_queue_is_full(queue)) 4299 netif_tx_start_queue(txq); 4300 return rc; 4301 } 4302 4303 static void qeth_fill_tso_ext(struct qeth_hdr_tso *hdr, 4304 unsigned int payload_len, struct sk_buff *skb, 4305 unsigned int proto_len) 4306 { 4307 struct qeth_hdr_ext_tso *ext = &hdr->ext; 4308 4309 ext->hdr_tot_len = sizeof(*ext); 4310 ext->imb_hdr_no = 1; 4311 ext->hdr_type = 1; 4312 ext->hdr_version = 1; 4313 ext->hdr_len = 28; 4314 ext->payload_len = payload_len; 4315 ext->mss = skb_shinfo(skb)->gso_size; 4316 ext->dg_hdr_len = proto_len; 4317 } 4318 4319 int qeth_xmit(struct qeth_card *card, struct sk_buff *skb, 4320 struct qeth_qdio_out_q *queue, __be16 proto, 4321 void (*fill_header)(struct qeth_qdio_out_q *queue, 4322 struct qeth_hdr *hdr, struct sk_buff *skb, 4323 __be16 proto, unsigned int data_len)) 4324 { 4325 unsigned int proto_len, hw_hdr_len; 4326 unsigned int frame_len = skb->len; 4327 bool is_tso = skb_is_gso(skb); 4328 unsigned int data_offset = 0; 4329 struct qeth_hdr *hdr = NULL; 4330 unsigned int hd_len = 0; 4331 unsigned int elements; 4332 int push_len, rc; 4333 4334 if (is_tso) { 4335 hw_hdr_len = sizeof(struct qeth_hdr_tso); 4336 proto_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 4337 } else { 4338 hw_hdr_len = sizeof(struct qeth_hdr); 4339 proto_len = (IS_IQD(card) && IS_LAYER2(card)) ? ETH_HLEN : 0; 4340 } 4341 4342 rc = skb_cow_head(skb, hw_hdr_len); 4343 if (rc) 4344 return rc; 4345 4346 push_len = qeth_add_hw_header(queue, skb, &hdr, hw_hdr_len, proto_len, 4347 &elements); 4348 if (push_len < 0) 4349 return push_len; 4350 if (is_tso || !push_len) { 4351 /* HW header needs its own buffer element. */ 4352 hd_len = hw_hdr_len + proto_len; 4353 data_offset = push_len + proto_len; 4354 } 4355 memset(hdr, 0, hw_hdr_len); 4356 fill_header(queue, hdr, skb, proto, frame_len); 4357 if (is_tso) 4358 qeth_fill_tso_ext((struct qeth_hdr_tso *) hdr, 4359 frame_len - proto_len, skb, proto_len); 4360 4361 if (IS_IQD(card)) { 4362 rc = __qeth_xmit(card, queue, skb, elements, hdr, data_offset, 4363 hd_len); 4364 } else { 4365 /* TODO: drop skb_orphan() once TX completion is fast enough */ 4366 skb_orphan(skb); 4367 spin_lock(&queue->lock); 4368 rc = qeth_do_send_packet(card, queue, skb, hdr, data_offset, 4369 hd_len, elements); 4370 spin_unlock(&queue->lock); 4371 } 4372 4373 if (rc && !push_len) 4374 kmem_cache_free(qeth_core_header_cache, hdr); 4375 4376 return rc; 4377 } 4378 EXPORT_SYMBOL_GPL(qeth_xmit); 4379 4380 static int qeth_setadp_promisc_mode_cb(struct qeth_card *card, 4381 struct qeth_reply *reply, unsigned long data) 4382 { 4383 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; 4384 struct qeth_ipacmd_setadpparms *setparms; 4385 4386 QETH_CARD_TEXT(card, 4, "prmadpcb"); 4387 4388 setparms = &(cmd->data.setadapterparms); 4389 if (qeth_setadpparms_inspect_rc(cmd)) { 4390 QETH_CARD_TEXT_(card, 4, "prmrc%x", cmd->hdr.return_code); 4391 setparms->data.mode = SET_PROMISC_MODE_OFF; 4392 } 4393 card->info.promisc_mode = setparms->data.mode; 4394 return (cmd->hdr.return_code) ? -EIO : 0; 4395 } 4396 4397 void qeth_setadp_promisc_mode(struct qeth_card *card, bool enable) 4398 { 4399 enum qeth_ipa_promisc_modes mode = enable ? SET_PROMISC_MODE_ON : 4400 SET_PROMISC_MODE_OFF; 4401 struct qeth_cmd_buffer *iob; 4402 struct qeth_ipa_cmd *cmd; 4403 4404 QETH_CARD_TEXT(card, 4, "setprom"); 4405 QETH_CARD_TEXT_(card, 4, "mode:%x", mode); 4406 4407 iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE, 4408 SETADP_DATA_SIZEOF(mode)); 4409 if (!iob) 4410 return; 4411 cmd = __ipa_cmd(iob); 4412 cmd->data.setadapterparms.data.mode = mode; 4413 qeth_send_ipa_cmd(card, iob, qeth_setadp_promisc_mode_cb, NULL); 4414 } 4415 EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode); 4416 4417 static int qeth_setadpparms_change_macaddr_cb(struct qeth_card *card, 4418 struct qeth_reply *reply, unsigned long data) 4419 { 4420 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; 4421 struct qeth_ipacmd_setadpparms *adp_cmd; 4422 4423 QETH_CARD_TEXT(card, 4, "chgmaccb"); 4424 if (qeth_setadpparms_inspect_rc(cmd)) 4425 return -EIO; 4426 4427 adp_cmd = &cmd->data.setadapterparms; 4428 if (!is_valid_ether_addr(adp_cmd->data.change_addr.addr)) 4429 return -EADDRNOTAVAIL; 4430 4431 if (IS_LAYER2(card) && IS_OSD(card) && !IS_VM_NIC(card) && 4432 !(adp_cmd->hdr.flags & QETH_SETADP_FLAGS_VIRTUAL_MAC)) 4433 return -EADDRNOTAVAIL; 4434 4435 eth_hw_addr_set(card->dev, adp_cmd->data.change_addr.addr); 4436 return 0; 4437 } 4438 4439 int qeth_setadpparms_change_macaddr(struct qeth_card *card) 4440 { 4441 int rc; 4442 struct qeth_cmd_buffer *iob; 4443 struct qeth_ipa_cmd *cmd; 4444 4445 QETH_CARD_TEXT(card, 4, "chgmac"); 4446 4447 iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS, 4448 SETADP_DATA_SIZEOF(change_addr)); 4449 if (!iob) 4450 return -ENOMEM; 4451 cmd = __ipa_cmd(iob); 4452 cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC; 4453 cmd->data.setadapterparms.data.change_addr.addr_size = ETH_ALEN; 4454 ether_addr_copy(cmd->data.setadapterparms.data.change_addr.addr, 4455 card->dev->dev_addr); 4456 rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_change_macaddr_cb, 4457 NULL); 4458 return rc; 4459 } 4460 EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr); 4461 4462 static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card, 4463 struct qeth_reply *reply, unsigned long data) 4464 { 4465 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; 4466 struct qeth_set_access_ctrl *access_ctrl_req; 4467 4468 QETH_CARD_TEXT(card, 4, "setaccb"); 4469 4470 access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl; 4471 QETH_CARD_TEXT_(card, 2, "rc=%d", 4472 cmd->data.setadapterparms.hdr.return_code); 4473 if (cmd->data.setadapterparms.hdr.return_code != 4474 SET_ACCESS_CTRL_RC_SUCCESS) 4475 QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%#x) on device %x: %#x\n", 4476 access_ctrl_req->subcmd_code, CARD_DEVID(card), 4477 cmd->data.setadapterparms.hdr.return_code); 4478 switch (qeth_setadpparms_inspect_rc(cmd)) { 4479 case SET_ACCESS_CTRL_RC_SUCCESS: 4480 if (access_ctrl_req->subcmd_code == ISOLATION_MODE_NONE) 4481 dev_info(&card->gdev->dev, 4482 "QDIO data connection isolation is deactivated\n"); 4483 else 4484 dev_info(&card->gdev->dev, 4485 "QDIO data connection isolation is activated\n"); 4486 return 0; 4487 case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED: 4488 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already deactivated\n", 4489 CARD_DEVID(card)); 4490 return 0; 4491 case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED: 4492 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already activated\n", 4493 CARD_DEVID(card)); 4494 return 0; 4495 case SET_ACCESS_CTRL_RC_NOT_SUPPORTED: 4496 dev_err(&card->gdev->dev, "Adapter does not " 4497 "support QDIO data connection isolation\n"); 4498 return -EOPNOTSUPP; 4499 case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER: 4500 dev_err(&card->gdev->dev, 4501 "Adapter is dedicated. " 4502 "QDIO data connection isolation not supported\n"); 4503 return -EOPNOTSUPP; 4504 case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF: 4505 dev_err(&card->gdev->dev, 4506 "TSO does not permit QDIO data connection isolation\n"); 4507 return -EPERM; 4508 case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED: 4509 dev_err(&card->gdev->dev, "The adjacent switch port does not " 4510 "support reflective relay mode\n"); 4511 return -EOPNOTSUPP; 4512 case SET_ACCESS_CTRL_RC_REFLREL_FAILED: 4513 dev_err(&card->gdev->dev, "The reflective relay mode cannot be " 4514 "enabled at the adjacent switch port"); 4515 return -EREMOTEIO; 4516 case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED: 4517 dev_warn(&card->gdev->dev, "Turning off reflective relay mode " 4518 "at the adjacent switch failed\n"); 4519 /* benign error while disabling ISOLATION_MODE_FWD */ 4520 return 0; 4521 default: 4522 return -EIO; 4523 } 4524 } 4525 4526 int qeth_setadpparms_set_access_ctrl(struct qeth_card *card, 4527 enum qeth_ipa_isolation_modes mode) 4528 { 4529 int rc; 4530 struct qeth_cmd_buffer *iob; 4531 struct qeth_ipa_cmd *cmd; 4532 struct qeth_set_access_ctrl *access_ctrl_req; 4533 4534 QETH_CARD_TEXT(card, 4, "setacctl"); 4535 4536 if (!qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) { 4537 dev_err(&card->gdev->dev, 4538 "Adapter does not support QDIO data connection isolation\n"); 4539 return -EOPNOTSUPP; 4540 } 4541 4542 iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL, 4543 SETADP_DATA_SIZEOF(set_access_ctrl)); 4544 if (!iob) 4545 return -ENOMEM; 4546 cmd = __ipa_cmd(iob); 4547 access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl; 4548 access_ctrl_req->subcmd_code = mode; 4549 4550 rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb, 4551 NULL); 4552 if (rc) { 4553 QETH_CARD_TEXT_(card, 2, "rc=%d", rc); 4554 QETH_DBF_MESSAGE(3, "IPA(SET_ACCESS_CTRL(%d) on device %x: sent failed\n", 4555 rc, CARD_DEVID(card)); 4556 } 4557 4558 return rc; 4559 } 4560 4561 void qeth_tx_timeout(struct net_device *dev, unsigned int txqueue) 4562 { 4563 struct qeth_card *card; 4564 4565 card = dev->ml_priv; 4566 QETH_CARD_TEXT(card, 4, "txtimeo"); 4567 qeth_schedule_recovery(card); 4568 } 4569 EXPORT_SYMBOL_GPL(qeth_tx_timeout); 4570 4571 static int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum) 4572 { 4573 struct qeth_card *card = dev->ml_priv; 4574 int rc = 0; 4575 4576 switch (regnum) { 4577 case MII_BMCR: /* Basic mode control register */ 4578 rc = BMCR_FULLDPLX; 4579 if ((card->info.link_type != QETH_LINK_TYPE_GBIT_ETH) && 4580 (card->info.link_type != QETH_LINK_TYPE_10GBIT_ETH) && 4581 (card->info.link_type != QETH_LINK_TYPE_25GBIT_ETH)) 4582 rc |= BMCR_SPEED100; 4583 break; 4584 case MII_BMSR: /* Basic mode status register */ 4585 rc = BMSR_ERCAP | BMSR_ANEGCOMPLETE | BMSR_LSTATUS | 4586 BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL | 4587 BMSR_100BASE4; 4588 break; 4589 case MII_PHYSID1: /* PHYS ID 1 */ 4590 rc = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 8) | 4591 dev->dev_addr[2]; 4592 rc = (rc >> 5) & 0xFFFF; 4593 break; 4594 case MII_PHYSID2: /* PHYS ID 2 */ 4595 rc = (dev->dev_addr[2] << 10) & 0xFFFF; 4596 break; 4597 case MII_ADVERTISE: /* Advertisement control reg */ 4598 rc = ADVERTISE_ALL; 4599 break; 4600 case MII_LPA: /* Link partner ability reg */ 4601 rc = LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL | 4602 LPA_100BASE4 | LPA_LPACK; 4603 break; 4604 case MII_EXPANSION: /* Expansion register */ 4605 break; 4606 case MII_DCOUNTER: /* disconnect counter */ 4607 break; 4608 case MII_FCSCOUNTER: /* false carrier counter */ 4609 break; 4610 case MII_NWAYTEST: /* N-way auto-neg test register */ 4611 break; 4612 case MII_RERRCOUNTER: /* rx error counter */ 4613 rc = card->stats.rx_length_errors + 4614 card->stats.rx_frame_errors + 4615 card->stats.rx_fifo_errors; 4616 break; 4617 case MII_SREVISION: /* silicon revision */ 4618 break; 4619 case MII_RESV1: /* reserved 1 */ 4620 break; 4621 case MII_LBRERROR: /* loopback, rx, bypass error */ 4622 break; 4623 case MII_PHYADDR: /* physical address */ 4624 break; 4625 case MII_RESV2: /* reserved 2 */ 4626 break; 4627 case MII_TPISTATUS: /* TPI status for 10mbps */ 4628 break; 4629 case MII_NCONFIG: /* network interface config */ 4630 break; 4631 default: 4632 break; 4633 } 4634 return rc; 4635 } 4636 4637 static int qeth_snmp_command_cb(struct qeth_card *card, 4638 struct qeth_reply *reply, unsigned long data) 4639 { 4640 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; 4641 struct qeth_arp_query_info *qinfo = reply->param; 4642 struct qeth_ipacmd_setadpparms *adp_cmd; 4643 unsigned int data_len; 4644 void *snmp_data; 4645 4646 QETH_CARD_TEXT(card, 3, "snpcmdcb"); 4647 4648 if (cmd->hdr.return_code) { 4649 QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code); 4650 return -EIO; 4651 } 4652 if (cmd->data.setadapterparms.hdr.return_code) { 4653 cmd->hdr.return_code = 4654 cmd->data.setadapterparms.hdr.return_code; 4655 QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code); 4656 return -EIO; 4657 } 4658 4659 adp_cmd = &cmd->data.setadapterparms; 4660 data_len = adp_cmd->hdr.cmdlength - sizeof(adp_cmd->hdr); 4661 if (adp_cmd->hdr.seq_no == 1) { 4662 snmp_data = &adp_cmd->data.snmp; 4663 } else { 4664 snmp_data = &adp_cmd->data.snmp.request; 4665 data_len -= offsetof(struct qeth_snmp_cmd, request); 4666 } 4667 4668 /* check if there is enough room in userspace */ 4669 if ((qinfo->udata_len - qinfo->udata_offset) < data_len) { 4670 QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOSPC); 4671 return -ENOSPC; 4672 } 4673 QETH_CARD_TEXT_(card, 4, "snore%i", 4674 cmd->data.setadapterparms.hdr.used_total); 4675 QETH_CARD_TEXT_(card, 4, "sseqn%i", 4676 cmd->data.setadapterparms.hdr.seq_no); 4677 /*copy entries to user buffer*/ 4678 memcpy(qinfo->udata + qinfo->udata_offset, snmp_data, data_len); 4679 qinfo->udata_offset += data_len; 4680 4681 if (cmd->data.setadapterparms.hdr.seq_no < 4682 cmd->data.setadapterparms.hdr.used_total) 4683 return 1; 4684 return 0; 4685 } 4686 4687 static int qeth_snmp_command(struct qeth_card *card, char __user *udata) 4688 { 4689 struct qeth_snmp_ureq __user *ureq; 4690 struct qeth_cmd_buffer *iob; 4691 unsigned int req_len; 4692 struct qeth_arp_query_info qinfo = {0, }; 4693 int rc = 0; 4694 4695 QETH_CARD_TEXT(card, 3, "snmpcmd"); 4696 4697 if (IS_VM_NIC(card)) 4698 return -EOPNOTSUPP; 4699 4700 if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) && 4701 IS_LAYER3(card)) 4702 return -EOPNOTSUPP; 4703 4704 ureq = (struct qeth_snmp_ureq __user *) udata; 4705 if (get_user(qinfo.udata_len, &ureq->hdr.data_len) || 4706 get_user(req_len, &ureq->hdr.req_len)) 4707 return -EFAULT; 4708 4709 /* Sanitize user input, to avoid overflows in iob size calculation: */ 4710 if (req_len > QETH_BUFSIZE) 4711 return -EINVAL; 4712 4713 iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL, req_len); 4714 if (!iob) 4715 return -ENOMEM; 4716 4717 if (copy_from_user(&__ipa_cmd(iob)->data.setadapterparms.data.snmp, 4718 &ureq->cmd, req_len)) { 4719 qeth_put_cmd(iob); 4720 return -EFAULT; 4721 } 4722 4723 qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL); 4724 if (!qinfo.udata) { 4725 qeth_put_cmd(iob); 4726 return -ENOMEM; 4727 } 4728 qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr); 4729 4730 rc = qeth_send_ipa_cmd(card, iob, qeth_snmp_command_cb, &qinfo); 4731 if (rc) 4732 QETH_DBF_MESSAGE(2, "SNMP command failed on device %x: (%#x)\n", 4733 CARD_DEVID(card), rc); 4734 else { 4735 if (copy_to_user(udata, qinfo.udata, qinfo.udata_len)) 4736 rc = -EFAULT; 4737 } 4738 4739 kfree(qinfo.udata); 4740 return rc; 4741 } 4742 4743 static int qeth_setadpparms_query_oat_cb(struct qeth_card *card, 4744 struct qeth_reply *reply, 4745 unsigned long data) 4746 { 4747 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data; 4748 struct qeth_qoat_priv *priv = reply->param; 4749 int resdatalen; 4750 4751 QETH_CARD_TEXT(card, 3, "qoatcb"); 4752 if (qeth_setadpparms_inspect_rc(cmd)) 4753 return -EIO; 4754 4755 resdatalen = cmd->data.setadapterparms.hdr.cmdlength; 4756 4757 if (resdatalen > (priv->buffer_len - priv->response_len)) 4758 return -ENOSPC; 4759 4760 memcpy(priv->buffer + priv->response_len, 4761 &cmd->data.setadapterparms.hdr, resdatalen); 4762 priv->response_len += resdatalen; 4763 4764 if (cmd->data.setadapterparms.hdr.seq_no < 4765 cmd->data.setadapterparms.hdr.used_total) 4766 return 1; 4767 return 0; 4768 } 4769 4770 static int qeth_query_oat_command(struct qeth_card *card, char __user *udata) 4771 { 4772 int rc = 0; 4773 struct qeth_cmd_buffer *iob; 4774 struct qeth_ipa_cmd *cmd; 4775 struct qeth_query_oat *oat_req; 4776 struct qeth_query_oat_data oat_data; 4777 struct qeth_qoat_priv priv; 4778 void __user *tmp; 4779 4780 QETH_CARD_TEXT(card, 3, "qoatcmd"); 4781 4782 if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT)) 4783 return -EOPNOTSUPP; 4784 4785 if (copy_from_user(&oat_data, udata, sizeof(oat_data))) 4786 return -EFAULT; 4787 4788 priv.buffer_len = oat_data.buffer_len; 4789 priv.response_len = 0; 4790 priv.buffer = vzalloc(oat_data.buffer_len); 4791 if (!priv.buffer) 4792 return -ENOMEM; 4793 4794 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT, 4795 SETADP_DATA_SIZEOF(query_oat)); 4796 if (!iob) { 4797 rc = -ENOMEM; 4798 goto out_free; 4799 } 4800 cmd = __ipa_cmd(iob); 4801 oat_req = &cmd->data.setadapterparms.data.query_oat; 4802 oat_req->subcmd_code = oat_data.command; 4803 4804 rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb, &priv); 4805 if (!rc) { 4806 tmp = u64_to_user_ptr(oat_data.ptr); 4807 oat_data.response_len = priv.response_len; 4808 4809 if (copy_to_user(tmp, priv.buffer, priv.response_len) || 4810 copy_to_user(udata, &oat_data, sizeof(oat_data))) 4811 rc = -EFAULT; 4812 } 4813 4814 out_free: 4815 vfree(priv.buffer); 4816 return rc; 4817 } 4818 4819 static int qeth_init_link_info_oat_cb(struct qeth_card *card, 4820 struct qeth_reply *reply_priv, 4821 unsigned long data) 4822 { 4823 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data; 4824 struct qeth_link_info *link_info = reply_priv->param; 4825 struct qeth_query_oat_physical_if *phys_if; 4826 struct qeth_query_oat_reply *reply; 4827 4828 QETH_CARD_TEXT(card, 2, "qoatincb"); 4829 if (qeth_setadpparms_inspect_rc(cmd)) 4830 return -EIO; 4831 4832 /* Multi-part reply is unexpected, don't bother: */ 4833 if (cmd->data.setadapterparms.hdr.used_total > 1) 4834 return -EINVAL; 4835 4836 /* Expect the reply to start with phys_if data: */ 4837 reply = &cmd->data.setadapterparms.data.query_oat.reply[0]; 4838 if (reply->type != QETH_QOAT_REPLY_TYPE_PHYS_IF || 4839 reply->length < sizeof(*reply)) 4840 return -EINVAL; 4841 4842 phys_if = &reply->phys_if; 4843 4844 switch (phys_if->speed_duplex) { 4845 case QETH_QOAT_PHYS_SPEED_10M_HALF: 4846 link_info->speed = SPEED_10; 4847 link_info->duplex = DUPLEX_HALF; 4848 break; 4849 case QETH_QOAT_PHYS_SPEED_10M_FULL: 4850 link_info->speed = SPEED_10; 4851 link_info->duplex = DUPLEX_FULL; 4852 break; 4853 case QETH_QOAT_PHYS_SPEED_100M_HALF: 4854 link_info->speed = SPEED_100; 4855 link_info->duplex = DUPLEX_HALF; 4856 break; 4857 case QETH_QOAT_PHYS_SPEED_100M_FULL: 4858 link_info->speed = SPEED_100; 4859 link_info->duplex = DUPLEX_FULL; 4860 break; 4861 case QETH_QOAT_PHYS_SPEED_1000M_HALF: 4862 link_info->speed = SPEED_1000; 4863 link_info->duplex = DUPLEX_HALF; 4864 break; 4865 case QETH_QOAT_PHYS_SPEED_1000M_FULL: 4866 link_info->speed = SPEED_1000; 4867 link_info->duplex = DUPLEX_FULL; 4868 break; 4869 case QETH_QOAT_PHYS_SPEED_10G_FULL: 4870 link_info->speed = SPEED_10000; 4871 link_info->duplex = DUPLEX_FULL; 4872 break; 4873 case QETH_QOAT_PHYS_SPEED_25G_FULL: 4874 link_info->speed = SPEED_25000; 4875 link_info->duplex = DUPLEX_FULL; 4876 break; 4877 case QETH_QOAT_PHYS_SPEED_UNKNOWN: 4878 default: 4879 link_info->speed = SPEED_UNKNOWN; 4880 link_info->duplex = DUPLEX_UNKNOWN; 4881 break; 4882 } 4883 4884 switch (phys_if->media_type) { 4885 case QETH_QOAT_PHYS_MEDIA_COPPER: 4886 link_info->port = PORT_TP; 4887 link_info->link_mode = QETH_LINK_MODE_UNKNOWN; 4888 break; 4889 case QETH_QOAT_PHYS_MEDIA_FIBRE_SHORT: 4890 link_info->port = PORT_FIBRE; 4891 link_info->link_mode = QETH_LINK_MODE_FIBRE_SHORT; 4892 break; 4893 case QETH_QOAT_PHYS_MEDIA_FIBRE_LONG: 4894 link_info->port = PORT_FIBRE; 4895 link_info->link_mode = QETH_LINK_MODE_FIBRE_LONG; 4896 break; 4897 default: 4898 link_info->port = PORT_OTHER; 4899 link_info->link_mode = QETH_LINK_MODE_UNKNOWN; 4900 break; 4901 } 4902 4903 return 0; 4904 } 4905 4906 static void qeth_init_link_info(struct qeth_card *card) 4907 { 4908 qeth_default_link_info(card); 4909 4910 /* Get more accurate data via QUERY OAT: */ 4911 if (qeth_adp_supported(card, IPA_SETADP_QUERY_OAT)) { 4912 struct qeth_link_info link_info; 4913 struct qeth_cmd_buffer *iob; 4914 4915 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT, 4916 SETADP_DATA_SIZEOF(query_oat)); 4917 if (iob) { 4918 struct qeth_ipa_cmd *cmd = __ipa_cmd(iob); 4919 struct qeth_query_oat *oat_req; 4920 4921 oat_req = &cmd->data.setadapterparms.data.query_oat; 4922 oat_req->subcmd_code = QETH_QOAT_SCOPE_INTERFACE; 4923 4924 if (!qeth_send_ipa_cmd(card, iob, 4925 qeth_init_link_info_oat_cb, 4926 &link_info)) { 4927 if (link_info.speed != SPEED_UNKNOWN) 4928 card->info.link_info.speed = link_info.speed; 4929 if (link_info.duplex != DUPLEX_UNKNOWN) 4930 card->info.link_info.duplex = link_info.duplex; 4931 if (link_info.port != PORT_OTHER) 4932 card->info.link_info.port = link_info.port; 4933 if (link_info.link_mode != QETH_LINK_MODE_UNKNOWN) 4934 card->info.link_info.link_mode = link_info.link_mode; 4935 } 4936 } 4937 } 4938 } 4939 4940 /** 4941 * qeth_vm_request_mac() - Request a hypervisor-managed MAC address 4942 * @card: pointer to a qeth_card 4943 * 4944 * Returns 4945 * 0, if a MAC address has been set for the card's netdevice 4946 * a return code, for various error conditions 4947 */ 4948 int qeth_vm_request_mac(struct qeth_card *card) 4949 { 4950 struct diag26c_mac_resp *response; 4951 struct diag26c_mac_req *request; 4952 int rc; 4953 4954 QETH_CARD_TEXT(card, 2, "vmreqmac"); 4955 4956 request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA); 4957 response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA); 4958 if (!request || !response) { 4959 rc = -ENOMEM; 4960 goto out; 4961 } 4962 4963 request->resp_buf_len = sizeof(*response); 4964 request->resp_version = DIAG26C_VERSION2; 4965 request->op_code = DIAG26C_GET_MAC; 4966 request->devno = card->info.ddev_devno; 4967 4968 QETH_DBF_HEX(CTRL, 2, request, sizeof(*request)); 4969 rc = diag26c(request, response, DIAG26C_MAC_SERVICES); 4970 QETH_DBF_HEX(CTRL, 2, request, sizeof(*request)); 4971 if (rc) 4972 goto out; 4973 QETH_DBF_HEX(CTRL, 2, response, sizeof(*response)); 4974 4975 if (request->resp_buf_len < sizeof(*response) || 4976 response->version != request->resp_version) { 4977 rc = -EIO; 4978 QETH_CARD_TEXT(card, 2, "badresp"); 4979 QETH_CARD_HEX(card, 2, &request->resp_buf_len, 4980 sizeof(request->resp_buf_len)); 4981 } else if (!is_valid_ether_addr(response->mac)) { 4982 rc = -EINVAL; 4983 QETH_CARD_TEXT(card, 2, "badmac"); 4984 QETH_CARD_HEX(card, 2, response->mac, ETH_ALEN); 4985 } else { 4986 eth_hw_addr_set(card->dev, response->mac); 4987 } 4988 4989 out: 4990 kfree(response); 4991 kfree(request); 4992 return rc; 4993 } 4994 EXPORT_SYMBOL_GPL(qeth_vm_request_mac); 4995 4996 static void qeth_determine_capabilities(struct qeth_card *card) 4997 { 4998 struct qeth_channel *channel = &card->data; 4999 struct ccw_device *ddev = channel->ccwdev; 5000 int rc; 5001 int ddev_offline = 0; 5002 5003 QETH_CARD_TEXT(card, 2, "detcapab"); 5004 if (!ddev->online) { 5005 ddev_offline = 1; 5006 rc = qeth_start_channel(channel); 5007 if (rc) { 5008 QETH_CARD_TEXT_(card, 2, "3err%d", rc); 5009 goto out; 5010 } 5011 } 5012 5013 rc = qeth_read_conf_data(card); 5014 if (rc) { 5015 QETH_DBF_MESSAGE(2, "qeth_read_conf_data on device %x returned %i\n", 5016 CARD_DEVID(card), rc); 5017 QETH_CARD_TEXT_(card, 2, "5err%d", rc); 5018 goto out_offline; 5019 } 5020 5021 rc = qdio_get_ssqd_desc(ddev, &card->ssqd); 5022 if (rc) 5023 QETH_CARD_TEXT_(card, 2, "6err%d", rc); 5024 5025 QETH_CARD_TEXT_(card, 2, "qfmt%d", card->ssqd.qfmt); 5026 QETH_CARD_TEXT_(card, 2, "ac1:%02x", card->ssqd.qdioac1); 5027 QETH_CARD_TEXT_(card, 2, "ac2:%04x", card->ssqd.qdioac2); 5028 QETH_CARD_TEXT_(card, 2, "ac3:%04x", card->ssqd.qdioac3); 5029 QETH_CARD_TEXT_(card, 2, "icnt%d", card->ssqd.icnt); 5030 if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) || 5031 ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) || 5032 ((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) { 5033 dev_info(&card->gdev->dev, 5034 "Completion Queueing supported\n"); 5035 } else { 5036 card->options.cq = QETH_CQ_NOTAVAILABLE; 5037 } 5038 5039 out_offline: 5040 if (ddev_offline == 1) 5041 qeth_stop_channel(channel); 5042 out: 5043 return; 5044 } 5045 5046 static void qeth_read_ccw_conf_data(struct qeth_card *card) 5047 { 5048 struct qeth_card_info *info = &card->info; 5049 struct ccw_device *cdev = CARD_DDEV(card); 5050 struct ccw_dev_id dev_id; 5051 5052 QETH_CARD_TEXT(card, 2, "ccwconfd"); 5053 ccw_device_get_id(cdev, &dev_id); 5054 5055 info->ddev_devno = dev_id.devno; 5056 info->ids_valid = !ccw_device_get_cssid(cdev, &info->cssid) && 5057 !ccw_device_get_iid(cdev, &info->iid) && 5058 !ccw_device_get_chid(cdev, 0, &info->chid); 5059 info->ssid = dev_id.ssid; 5060 5061 dev_info(&card->gdev->dev, "CHID: %x CHPID: %x\n", 5062 info->chid, info->chpid); 5063 5064 QETH_CARD_TEXT_(card, 3, "devn%x", info->ddev_devno); 5065 QETH_CARD_TEXT_(card, 3, "cssid:%x", info->cssid); 5066 QETH_CARD_TEXT_(card, 3, "iid:%x", info->iid); 5067 QETH_CARD_TEXT_(card, 3, "ssid:%x", info->ssid); 5068 QETH_CARD_TEXT_(card, 3, "chpid:%x", info->chpid); 5069 QETH_CARD_TEXT_(card, 3, "chid:%x", info->chid); 5070 QETH_CARD_TEXT_(card, 3, "idval%x", info->ids_valid); 5071 } 5072 5073 static int qeth_qdio_establish(struct qeth_card *card) 5074 { 5075 struct qdio_buffer **out_sbal_ptrs[QETH_MAX_OUT_QUEUES]; 5076 struct qdio_buffer **in_sbal_ptrs[QETH_MAX_IN_QUEUES]; 5077 struct qeth_qib_parms *qib_parms = NULL; 5078 struct qdio_initialize init_data; 5079 unsigned int no_input_qs = 1; 5080 unsigned int i; 5081 int rc = 0; 5082 5083 QETH_CARD_TEXT(card, 2, "qdioest"); 5084 5085 if (!IS_IQD(card) && !IS_VM_NIC(card)) { 5086 qib_parms = kzalloc(sizeof_field(struct qib, parm), GFP_KERNEL); 5087 if (!qib_parms) 5088 return -ENOMEM; 5089 5090 qeth_fill_qib_parms(card, qib_parms); 5091 } 5092 5093 in_sbal_ptrs[0] = card->qdio.in_q->qdio_bufs; 5094 if (card->options.cq == QETH_CQ_ENABLED) { 5095 in_sbal_ptrs[1] = card->qdio.c_q->qdio_bufs; 5096 no_input_qs++; 5097 } 5098 5099 for (i = 0; i < card->qdio.no_out_queues; i++) 5100 out_sbal_ptrs[i] = card->qdio.out_qs[i]->qdio_bufs; 5101 5102 memset(&init_data, 0, sizeof(struct qdio_initialize)); 5103 init_data.q_format = IS_IQD(card) ? QDIO_IQDIO_QFMT : 5104 QDIO_QETH_QFMT; 5105 init_data.qib_param_field_format = 0; 5106 init_data.qib_param_field = (void *)qib_parms; 5107 init_data.no_input_qs = no_input_qs; 5108 init_data.no_output_qs = card->qdio.no_out_queues; 5109 init_data.input_handler = qeth_qdio_input_handler; 5110 init_data.output_handler = qeth_qdio_output_handler; 5111 init_data.irq_poll = qeth_qdio_poll; 5112 init_data.int_parm = (unsigned long) card; 5113 init_data.input_sbal_addr_array = in_sbal_ptrs; 5114 init_data.output_sbal_addr_array = out_sbal_ptrs; 5115 5116 if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED, 5117 QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) { 5118 rc = qdio_allocate(CARD_DDEV(card), init_data.no_input_qs, 5119 init_data.no_output_qs); 5120 if (rc) { 5121 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED); 5122 goto out; 5123 } 5124 rc = qdio_establish(CARD_DDEV(card), &init_data); 5125 if (rc) { 5126 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED); 5127 qdio_free(CARD_DDEV(card)); 5128 } 5129 } 5130 5131 switch (card->options.cq) { 5132 case QETH_CQ_ENABLED: 5133 dev_info(&card->gdev->dev, "Completion Queue support enabled"); 5134 break; 5135 case QETH_CQ_DISABLED: 5136 dev_info(&card->gdev->dev, "Completion Queue support disabled"); 5137 break; 5138 default: 5139 break; 5140 } 5141 5142 out: 5143 kfree(qib_parms); 5144 return rc; 5145 } 5146 5147 static void qeth_core_free_card(struct qeth_card *card) 5148 { 5149 QETH_CARD_TEXT(card, 2, "freecrd"); 5150 5151 unregister_service_level(&card->qeth_service_level); 5152 debugfs_remove_recursive(card->debugfs); 5153 qeth_put_cmd(card->read_cmd); 5154 destroy_workqueue(card->event_wq); 5155 dev_set_drvdata(&card->gdev->dev, NULL); 5156 kfree(card); 5157 } 5158 5159 static void qeth_trace_features(struct qeth_card *card) 5160 { 5161 QETH_CARD_TEXT(card, 2, "features"); 5162 QETH_CARD_HEX(card, 2, &card->options.ipa4, sizeof(card->options.ipa4)); 5163 QETH_CARD_HEX(card, 2, &card->options.ipa6, sizeof(card->options.ipa6)); 5164 QETH_CARD_HEX(card, 2, &card->options.adp, sizeof(card->options.adp)); 5165 QETH_CARD_HEX(card, 2, &card->info.diagass_support, 5166 sizeof(card->info.diagass_support)); 5167 } 5168 5169 static struct ccw_device_id qeth_ids[] = { 5170 {CCW_DEVICE_DEVTYPE(0x1731, 0x01, 0x1732, 0x01), 5171 .driver_info = QETH_CARD_TYPE_OSD}, 5172 {CCW_DEVICE_DEVTYPE(0x1731, 0x05, 0x1732, 0x05), 5173 .driver_info = QETH_CARD_TYPE_IQD}, 5174 {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x03), 5175 .driver_info = QETH_CARD_TYPE_OSM}, 5176 #ifdef CONFIG_QETH_OSX 5177 {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02), 5178 .driver_info = QETH_CARD_TYPE_OSX}, 5179 #endif 5180 {}, 5181 }; 5182 MODULE_DEVICE_TABLE(ccw, qeth_ids); 5183 5184 static struct ccw_driver qeth_ccw_driver = { 5185 .driver = { 5186 .owner = THIS_MODULE, 5187 .name = "qeth", 5188 }, 5189 .ids = qeth_ids, 5190 .probe = ccwgroup_probe_ccwdev, 5191 .remove = ccwgroup_remove_ccwdev, 5192 }; 5193 5194 static int qeth_hardsetup_card(struct qeth_card *card, bool *carrier_ok) 5195 { 5196 int retries = 3; 5197 int rc; 5198 5199 QETH_CARD_TEXT(card, 2, "hrdsetup"); 5200 atomic_set(&card->force_alloc_skb, 0); 5201 rc = qeth_update_from_chp_desc(card); 5202 if (rc) 5203 return rc; 5204 retry: 5205 if (retries < 3) 5206 QETH_DBF_MESSAGE(2, "Retrying to do IDX activates on device %x.\n", 5207 CARD_DEVID(card)); 5208 rc = qeth_qdio_clear_card(card, !IS_IQD(card)); 5209 qeth_stop_channel(&card->data); 5210 qeth_stop_channel(&card->write); 5211 qeth_stop_channel(&card->read); 5212 qdio_free(CARD_DDEV(card)); 5213 5214 rc = qeth_start_channel(&card->read); 5215 if (rc) 5216 goto retriable; 5217 rc = qeth_start_channel(&card->write); 5218 if (rc) 5219 goto retriable; 5220 rc = qeth_start_channel(&card->data); 5221 if (rc) 5222 goto retriable; 5223 retriable: 5224 if (rc == -ERESTARTSYS) { 5225 QETH_CARD_TEXT(card, 2, "break1"); 5226 return rc; 5227 } else if (rc) { 5228 QETH_CARD_TEXT_(card, 2, "1err%d", rc); 5229 if (--retries < 0) 5230 goto out; 5231 else 5232 goto retry; 5233 } 5234 5235 qeth_determine_capabilities(card); 5236 qeth_read_ccw_conf_data(card); 5237 qeth_idx_init(card); 5238 5239 rc = qeth_idx_activate_read_channel(card); 5240 if (rc == -EINTR) { 5241 QETH_CARD_TEXT(card, 2, "break2"); 5242 return rc; 5243 } else if (rc) { 5244 QETH_CARD_TEXT_(card, 2, "3err%d", rc); 5245 if (--retries < 0) 5246 goto out; 5247 else 5248 goto retry; 5249 } 5250 5251 rc = qeth_idx_activate_write_channel(card); 5252 if (rc == -EINTR) { 5253 QETH_CARD_TEXT(card, 2, "break3"); 5254 return rc; 5255 } else if (rc) { 5256 QETH_CARD_TEXT_(card, 2, "4err%d", rc); 5257 if (--retries < 0) 5258 goto out; 5259 else 5260 goto retry; 5261 } 5262 card->read_or_write_problem = 0; 5263 rc = qeth_mpc_initialize(card); 5264 if (rc) { 5265 QETH_CARD_TEXT_(card, 2, "5err%d", rc); 5266 goto out; 5267 } 5268 5269 rc = qeth_send_startlan(card); 5270 if (rc) { 5271 QETH_CARD_TEXT_(card, 2, "6err%d", rc); 5272 if (rc == -ENETDOWN) { 5273 dev_warn(&card->gdev->dev, "The LAN is offline\n"); 5274 *carrier_ok = false; 5275 } else { 5276 goto out; 5277 } 5278 } else { 5279 *carrier_ok = true; 5280 } 5281 5282 card->options.ipa4.supported = 0; 5283 card->options.ipa6.supported = 0; 5284 card->options.adp.supported = 0; 5285 card->options.sbp.supported_funcs = 0; 5286 card->info.diagass_support = 0; 5287 rc = qeth_query_ipassists(card, QETH_PROT_IPV4); 5288 if (rc == -ENOMEM) 5289 goto out; 5290 if (qeth_is_supported(card, IPA_IPV6)) { 5291 rc = qeth_query_ipassists(card, QETH_PROT_IPV6); 5292 if (rc == -ENOMEM) 5293 goto out; 5294 } 5295 if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) { 5296 rc = qeth_query_setadapterparms(card); 5297 if (rc < 0) { 5298 QETH_CARD_TEXT_(card, 2, "7err%d", rc); 5299 goto out; 5300 } 5301 } 5302 if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) { 5303 rc = qeth_query_setdiagass(card); 5304 if (rc) 5305 QETH_CARD_TEXT_(card, 2, "8err%d", rc); 5306 } 5307 5308 qeth_trace_features(card); 5309 5310 if (!qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP) || 5311 (card->info.hwtrap && qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM))) 5312 card->info.hwtrap = 0; 5313 5314 if (card->options.isolation != ISOLATION_MODE_NONE) { 5315 rc = qeth_setadpparms_set_access_ctrl(card, 5316 card->options.isolation); 5317 if (rc) 5318 goto out; 5319 } 5320 5321 qeth_init_link_info(card); 5322 5323 rc = qeth_init_qdio_queues(card); 5324 if (rc) { 5325 QETH_CARD_TEXT_(card, 2, "9err%d", rc); 5326 goto out; 5327 } 5328 5329 return 0; 5330 out: 5331 dev_warn(&card->gdev->dev, "The qeth device driver failed to recover " 5332 "an error on the device\n"); 5333 QETH_DBF_MESSAGE(2, "Initialization for device %x failed in hardsetup! rc=%d\n", 5334 CARD_DEVID(card), rc); 5335 return rc; 5336 } 5337 5338 static int qeth_set_online(struct qeth_card *card, 5339 const struct qeth_discipline *disc) 5340 { 5341 bool carrier_ok; 5342 int rc; 5343 5344 mutex_lock(&card->conf_mutex); 5345 QETH_CARD_TEXT(card, 2, "setonlin"); 5346 5347 rc = qeth_hardsetup_card(card, &carrier_ok); 5348 if (rc) { 5349 QETH_CARD_TEXT_(card, 2, "2err%04x", rc); 5350 rc = -ENODEV; 5351 goto err_hardsetup; 5352 } 5353 5354 qeth_print_status_message(card); 5355 5356 if (card->dev->reg_state != NETREG_REGISTERED) 5357 /* no need for locking / error handling at this early stage: */ 5358 qeth_set_real_num_tx_queues(card, qeth_tx_actual_queues(card)); 5359 5360 rc = disc->set_online(card, carrier_ok); 5361 if (rc) 5362 goto err_online; 5363 5364 /* let user_space know that device is online */ 5365 kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE); 5366 5367 mutex_unlock(&card->conf_mutex); 5368 return 0; 5369 5370 err_online: 5371 err_hardsetup: 5372 qeth_qdio_clear_card(card, 0); 5373 qeth_clear_working_pool_list(card); 5374 qeth_flush_local_addrs(card); 5375 5376 qeth_stop_channel(&card->data); 5377 qeth_stop_channel(&card->write); 5378 qeth_stop_channel(&card->read); 5379 qdio_free(CARD_DDEV(card)); 5380 5381 mutex_unlock(&card->conf_mutex); 5382 return rc; 5383 } 5384 5385 int qeth_set_offline(struct qeth_card *card, const struct qeth_discipline *disc, 5386 bool resetting) 5387 { 5388 int rc, rc2, rc3; 5389 5390 mutex_lock(&card->conf_mutex); 5391 QETH_CARD_TEXT(card, 3, "setoffl"); 5392 5393 if ((!resetting && card->info.hwtrap) || card->info.hwtrap == 2) { 5394 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM); 5395 card->info.hwtrap = 1; 5396 } 5397 5398 /* cancel any stalled cmd that might block the rtnl: */ 5399 qeth_clear_ipacmd_list(card); 5400 5401 rtnl_lock(); 5402 netif_device_detach(card->dev); 5403 netif_carrier_off(card->dev); 5404 rtnl_unlock(); 5405 5406 cancel_work_sync(&card->rx_mode_work); 5407 5408 disc->set_offline(card); 5409 5410 qeth_qdio_clear_card(card, 0); 5411 qeth_drain_output_queues(card); 5412 qeth_clear_working_pool_list(card); 5413 qeth_flush_local_addrs(card); 5414 card->info.promisc_mode = 0; 5415 qeth_default_link_info(card); 5416 5417 rc = qeth_stop_channel(&card->data); 5418 rc2 = qeth_stop_channel(&card->write); 5419 rc3 = qeth_stop_channel(&card->read); 5420 if (!rc) 5421 rc = (rc2) ? rc2 : rc3; 5422 if (rc) 5423 QETH_CARD_TEXT_(card, 2, "1err%d", rc); 5424 qdio_free(CARD_DDEV(card)); 5425 5426 /* let user_space know that device is offline */ 5427 kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE); 5428 5429 mutex_unlock(&card->conf_mutex); 5430 return 0; 5431 } 5432 EXPORT_SYMBOL_GPL(qeth_set_offline); 5433 5434 static int qeth_do_reset(void *data) 5435 { 5436 const struct qeth_discipline *disc; 5437 struct qeth_card *card = data; 5438 int rc; 5439 5440 /* Lock-free, other users will block until we are done. */ 5441 disc = card->discipline; 5442 5443 QETH_CARD_TEXT(card, 2, "recover1"); 5444 if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD)) 5445 return 0; 5446 QETH_CARD_TEXT(card, 2, "recover2"); 5447 dev_warn(&card->gdev->dev, 5448 "A recovery process has been started for the device\n"); 5449 5450 qeth_set_offline(card, disc, true); 5451 rc = qeth_set_online(card, disc); 5452 if (!rc) { 5453 dev_info(&card->gdev->dev, 5454 "Device successfully recovered!\n"); 5455 } else { 5456 qeth_set_offline(card, disc, true); 5457 ccwgroup_set_offline(card->gdev, false); 5458 dev_warn(&card->gdev->dev, 5459 "The qeth device driver failed to recover an error on the device\n"); 5460 } 5461 qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD); 5462 qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD); 5463 return 0; 5464 } 5465 5466 #if IS_ENABLED(CONFIG_QETH_L3) 5467 static void qeth_l3_rebuild_skb(struct qeth_card *card, struct sk_buff *skb, 5468 struct qeth_hdr *hdr) 5469 { 5470 struct af_iucv_trans_hdr *iucv = (struct af_iucv_trans_hdr *) skb->data; 5471 struct qeth_hdr_layer3 *l3_hdr = &hdr->hdr.l3; 5472 struct net_device *dev = skb->dev; 5473 5474 if (IS_IQD(card) && iucv->magic == ETH_P_AF_IUCV) { 5475 dev_hard_header(skb, dev, ETH_P_AF_IUCV, dev->dev_addr, 5476 "FAKELL", skb->len); 5477 return; 5478 } 5479 5480 if (!(l3_hdr->flags & QETH_HDR_PASSTHRU)) { 5481 u16 prot = (l3_hdr->flags & QETH_HDR_IPV6) ? ETH_P_IPV6 : 5482 ETH_P_IP; 5483 unsigned char tg_addr[ETH_ALEN]; 5484 5485 skb_reset_network_header(skb); 5486 switch (l3_hdr->flags & QETH_HDR_CAST_MASK) { 5487 case QETH_CAST_MULTICAST: 5488 if (prot == ETH_P_IP) 5489 ip_eth_mc_map(ip_hdr(skb)->daddr, tg_addr); 5490 else 5491 ipv6_eth_mc_map(&ipv6_hdr(skb)->daddr, tg_addr); 5492 QETH_CARD_STAT_INC(card, rx_multicast); 5493 break; 5494 case QETH_CAST_BROADCAST: 5495 ether_addr_copy(tg_addr, dev->broadcast); 5496 QETH_CARD_STAT_INC(card, rx_multicast); 5497 break; 5498 default: 5499 if (card->options.sniffer) 5500 skb->pkt_type = PACKET_OTHERHOST; 5501 ether_addr_copy(tg_addr, dev->dev_addr); 5502 } 5503 5504 if (l3_hdr->ext_flags & QETH_HDR_EXT_SRC_MAC_ADDR) 5505 dev_hard_header(skb, dev, prot, tg_addr, 5506 &l3_hdr->next_hop.rx.src_mac, skb->len); 5507 else 5508 dev_hard_header(skb, dev, prot, tg_addr, "FAKELL", 5509 skb->len); 5510 } 5511 5512 /* copy VLAN tag from hdr into skb */ 5513 if (!card->options.sniffer && 5514 (l3_hdr->ext_flags & (QETH_HDR_EXT_VLAN_FRAME | 5515 QETH_HDR_EXT_INCLUDE_VLAN_TAG))) { 5516 u16 tag = (l3_hdr->ext_flags & QETH_HDR_EXT_VLAN_FRAME) ? 5517 l3_hdr->vlan_id : 5518 l3_hdr->next_hop.rx.vlan_id; 5519 5520 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag); 5521 } 5522 } 5523 #endif 5524 5525 static void qeth_receive_skb(struct qeth_card *card, struct sk_buff *skb, 5526 bool uses_frags, bool is_cso) 5527 { 5528 struct napi_struct *napi = &card->napi; 5529 5530 if (is_cso && (card->dev->features & NETIF_F_RXCSUM)) { 5531 skb->ip_summed = CHECKSUM_UNNECESSARY; 5532 QETH_CARD_STAT_INC(card, rx_skb_csum); 5533 } else { 5534 skb->ip_summed = CHECKSUM_NONE; 5535 } 5536 5537 QETH_CARD_STAT_ADD(card, rx_bytes, skb->len); 5538 QETH_CARD_STAT_INC(card, rx_packets); 5539 if (skb_is_nonlinear(skb)) { 5540 QETH_CARD_STAT_INC(card, rx_sg_skbs); 5541 QETH_CARD_STAT_ADD(card, rx_sg_frags, 5542 skb_shinfo(skb)->nr_frags); 5543 } 5544 5545 if (uses_frags) { 5546 napi_gro_frags(napi); 5547 } else { 5548 skb->protocol = eth_type_trans(skb, skb->dev); 5549 napi_gro_receive(napi, skb); 5550 } 5551 } 5552 5553 static void qeth_create_skb_frag(struct sk_buff *skb, char *data, int data_len) 5554 { 5555 struct page *page = virt_to_page(data); 5556 unsigned int next_frag; 5557 5558 next_frag = skb_shinfo(skb)->nr_frags; 5559 get_page(page); 5560 skb_add_rx_frag(skb, next_frag, page, offset_in_page(data), data_len, 5561 data_len); 5562 } 5563 5564 static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale) 5565 { 5566 return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY); 5567 } 5568 5569 static int qeth_extract_skb(struct qeth_card *card, 5570 struct qeth_qdio_buffer *qethbuffer, u8 *element_no, 5571 int *__offset) 5572 { 5573 struct qeth_priv *priv = netdev_priv(card->dev); 5574 struct qdio_buffer *buffer = qethbuffer->buffer; 5575 struct napi_struct *napi = &card->napi; 5576 struct qdio_buffer_element *element; 5577 unsigned int linear_len = 0; 5578 bool uses_frags = false; 5579 int offset = *__offset; 5580 bool use_rx_sg = false; 5581 unsigned int headroom; 5582 struct qeth_hdr *hdr; 5583 struct sk_buff *skb; 5584 int skb_len = 0; 5585 bool is_cso; 5586 5587 element = &buffer->element[*element_no]; 5588 5589 next_packet: 5590 /* qeth_hdr must not cross element boundaries */ 5591 while (element->length < offset + sizeof(struct qeth_hdr)) { 5592 if (qeth_is_last_sbale(element)) 5593 return -ENODATA; 5594 element++; 5595 offset = 0; 5596 } 5597 5598 hdr = dma64_to_virt(element->addr) + offset; 5599 offset += sizeof(*hdr); 5600 skb = NULL; 5601 5602 switch (hdr->hdr.l2.id) { 5603 case QETH_HEADER_TYPE_LAYER2: 5604 skb_len = hdr->hdr.l2.pkt_length; 5605 is_cso = hdr->hdr.l2.flags[1] & QETH_HDR_EXT_CSUM_TRANSP_REQ; 5606 5607 linear_len = ETH_HLEN; 5608 headroom = 0; 5609 break; 5610 case QETH_HEADER_TYPE_LAYER3: 5611 skb_len = hdr->hdr.l3.length; 5612 is_cso = hdr->hdr.l3.ext_flags & QETH_HDR_EXT_CSUM_TRANSP_REQ; 5613 5614 if (!IS_LAYER3(card)) { 5615 QETH_CARD_STAT_INC(card, rx_dropped_notsupp); 5616 goto walk_packet; 5617 } 5618 5619 if (hdr->hdr.l3.flags & QETH_HDR_PASSTHRU) { 5620 linear_len = ETH_HLEN; 5621 headroom = 0; 5622 break; 5623 } 5624 5625 if (hdr->hdr.l3.flags & QETH_HDR_IPV6) 5626 linear_len = sizeof(struct ipv6hdr); 5627 else 5628 linear_len = sizeof(struct iphdr); 5629 headroom = ETH_HLEN; 5630 break; 5631 default: 5632 if (hdr->hdr.l2.id & QETH_HEADER_MASK_INVAL) 5633 QETH_CARD_STAT_INC(card, rx_frame_errors); 5634 else 5635 QETH_CARD_STAT_INC(card, rx_dropped_notsupp); 5636 5637 /* Can't determine packet length, drop the whole buffer. */ 5638 return -EPROTONOSUPPORT; 5639 } 5640 5641 if (skb_len < linear_len) { 5642 QETH_CARD_STAT_INC(card, rx_dropped_runt); 5643 goto walk_packet; 5644 } 5645 5646 use_rx_sg = (card->options.cq == QETH_CQ_ENABLED) || 5647 (skb_len > READ_ONCE(priv->rx_copybreak) && 5648 !atomic_read(&card->force_alloc_skb)); 5649 5650 if (use_rx_sg) { 5651 /* QETH_CQ_ENABLED only: */ 5652 if (qethbuffer->rx_skb && 5653 skb_tailroom(qethbuffer->rx_skb) >= linear_len + headroom) { 5654 skb = qethbuffer->rx_skb; 5655 qethbuffer->rx_skb = NULL; 5656 goto use_skb; 5657 } 5658 5659 skb = napi_get_frags(napi); 5660 if (!skb) { 5661 /* -ENOMEM, no point in falling back further. */ 5662 QETH_CARD_STAT_INC(card, rx_dropped_nomem); 5663 goto walk_packet; 5664 } 5665 5666 if (skb_tailroom(skb) >= linear_len + headroom) { 5667 uses_frags = true; 5668 goto use_skb; 5669 } 5670 5671 netdev_info_once(card->dev, 5672 "Insufficient linear space in NAPI frags skb, need %u but have %u\n", 5673 linear_len + headroom, skb_tailroom(skb)); 5674 /* Shouldn't happen. Don't optimize, fall back to linear skb. */ 5675 } 5676 5677 linear_len = skb_len; 5678 skb = napi_alloc_skb(napi, linear_len + headroom); 5679 if (!skb) { 5680 QETH_CARD_STAT_INC(card, rx_dropped_nomem); 5681 goto walk_packet; 5682 } 5683 5684 use_skb: 5685 if (headroom) 5686 skb_reserve(skb, headroom); 5687 walk_packet: 5688 while (skb_len) { 5689 int data_len = min(skb_len, (int)(element->length - offset)); 5690 char *data = dma64_to_virt(element->addr) + offset; 5691 5692 skb_len -= data_len; 5693 offset += data_len; 5694 5695 /* Extract data from current element: */ 5696 if (skb && data_len) { 5697 if (linear_len) { 5698 unsigned int copy_len; 5699 5700 copy_len = min_t(unsigned int, linear_len, 5701 data_len); 5702 5703 skb_put_data(skb, data, copy_len); 5704 linear_len -= copy_len; 5705 data_len -= copy_len; 5706 data += copy_len; 5707 } 5708 5709 if (data_len) 5710 qeth_create_skb_frag(skb, data, data_len); 5711 } 5712 5713 /* Step forward to next element: */ 5714 if (skb_len) { 5715 if (qeth_is_last_sbale(element)) { 5716 QETH_CARD_TEXT(card, 4, "unexeob"); 5717 QETH_CARD_HEX(card, 2, buffer, sizeof(void *)); 5718 if (skb) { 5719 if (uses_frags) 5720 napi_free_frags(napi); 5721 else 5722 kfree_skb(skb); 5723 QETH_CARD_STAT_INC(card, 5724 rx_length_errors); 5725 } 5726 return -EMSGSIZE; 5727 } 5728 element++; 5729 offset = 0; 5730 } 5731 } 5732 5733 /* This packet was skipped, go get another one: */ 5734 if (!skb) 5735 goto next_packet; 5736 5737 *element_no = element - &buffer->element[0]; 5738 *__offset = offset; 5739 5740 #if IS_ENABLED(CONFIG_QETH_L3) 5741 if (hdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER3) 5742 qeth_l3_rebuild_skb(card, skb, hdr); 5743 #endif 5744 5745 qeth_receive_skb(card, skb, uses_frags, is_cso); 5746 return 0; 5747 } 5748 5749 static unsigned int qeth_extract_skbs(struct qeth_card *card, int budget, 5750 struct qeth_qdio_buffer *buf, bool *done) 5751 { 5752 unsigned int work_done = 0; 5753 5754 while (budget) { 5755 if (qeth_extract_skb(card, buf, &card->rx.buf_element, 5756 &card->rx.e_offset)) { 5757 *done = true; 5758 break; 5759 } 5760 5761 work_done++; 5762 budget--; 5763 } 5764 5765 return work_done; 5766 } 5767 5768 static unsigned int qeth_rx_poll(struct qeth_card *card, int budget) 5769 { 5770 struct qeth_rx *ctx = &card->rx; 5771 unsigned int work_done = 0; 5772 5773 while (budget > 0) { 5774 struct qeth_qdio_buffer *buffer; 5775 unsigned int skbs_done = 0; 5776 bool done = false; 5777 5778 /* Fetch completed RX buffers: */ 5779 if (!card->rx.b_count) { 5780 card->rx.qdio_err = 0; 5781 card->rx.b_count = 5782 qdio_inspect_input_queue(CARD_DDEV(card), 0, 5783 &card->rx.b_index, 5784 &card->rx.qdio_err); 5785 if (card->rx.b_count <= 0) { 5786 card->rx.b_count = 0; 5787 break; 5788 } 5789 } 5790 5791 /* Process one completed RX buffer: */ 5792 buffer = &card->qdio.in_q->bufs[card->rx.b_index]; 5793 if (!(card->rx.qdio_err && 5794 qeth_check_qdio_errors(card, buffer->buffer, 5795 card->rx.qdio_err, "qinerr"))) 5796 skbs_done = qeth_extract_skbs(card, budget, buffer, 5797 &done); 5798 else 5799 done = true; 5800 5801 work_done += skbs_done; 5802 budget -= skbs_done; 5803 5804 if (done) { 5805 QETH_CARD_STAT_INC(card, rx_bufs); 5806 qeth_put_buffer_pool_entry(card, buffer->pool_entry); 5807 buffer->pool_entry = NULL; 5808 card->rx.b_count--; 5809 ctx->bufs_refill++; 5810 ctx->bufs_refill -= qeth_rx_refill_queue(card, 5811 ctx->bufs_refill); 5812 5813 /* Step forward to next buffer: */ 5814 card->rx.b_index = QDIO_BUFNR(card->rx.b_index + 1); 5815 card->rx.buf_element = 0; 5816 card->rx.e_offset = 0; 5817 } 5818 } 5819 5820 return work_done; 5821 } 5822 5823 static void qeth_cq_poll(struct qeth_card *card) 5824 { 5825 unsigned int work_done = 0; 5826 5827 while (work_done < QDIO_MAX_BUFFERS_PER_Q) { 5828 unsigned int start, error; 5829 int completed; 5830 5831 completed = qdio_inspect_input_queue(CARD_DDEV(card), 1, &start, 5832 &error); 5833 if (completed <= 0) 5834 return; 5835 5836 qeth_qdio_cq_handler(card, error, 1, start, completed); 5837 work_done += completed; 5838 } 5839 } 5840 5841 int qeth_poll(struct napi_struct *napi, int budget) 5842 { 5843 struct qeth_card *card = container_of(napi, struct qeth_card, napi); 5844 unsigned int work_done; 5845 5846 work_done = qeth_rx_poll(card, budget); 5847 5848 if (qeth_use_tx_irqs(card)) { 5849 struct qeth_qdio_out_q *queue; 5850 unsigned int i; 5851 5852 qeth_for_each_output_queue(card, queue, i) { 5853 if (!qeth_out_queue_is_empty(queue)) 5854 napi_schedule(&queue->napi); 5855 } 5856 } 5857 5858 if (card->options.cq == QETH_CQ_ENABLED) 5859 qeth_cq_poll(card); 5860 5861 if (budget) { 5862 struct qeth_rx *ctx = &card->rx; 5863 5864 /* Process any substantial refill backlog: */ 5865 ctx->bufs_refill -= qeth_rx_refill_queue(card, ctx->bufs_refill); 5866 5867 /* Exhausted the RX budget. Keep IRQ disabled, we get called again. */ 5868 if (work_done >= budget) 5869 return work_done; 5870 } 5871 5872 if (napi_complete_done(napi, work_done) && 5873 qdio_start_irq(CARD_DDEV(card))) 5874 napi_schedule(napi); 5875 5876 return work_done; 5877 } 5878 EXPORT_SYMBOL_GPL(qeth_poll); 5879 5880 static void qeth_iqd_tx_complete(struct qeth_qdio_out_q *queue, 5881 unsigned int bidx, unsigned int qdio_error, 5882 int budget) 5883 { 5884 struct qeth_qdio_out_buffer *buffer = queue->bufs[bidx]; 5885 u8 sflags = buffer->buffer->element[15].sflags; 5886 struct qeth_card *card = queue->card; 5887 bool error = !!qdio_error; 5888 5889 if (qdio_error == QDIO_ERROR_SLSB_PENDING) { 5890 struct qaob *aob = buffer->aob; 5891 struct qeth_qaob_priv1 *priv; 5892 enum iucv_tx_notify notify; 5893 5894 if (!aob) { 5895 netdev_WARN_ONCE(card->dev, 5896 "Pending TX buffer %#x without QAOB on TX queue %u\n", 5897 bidx, queue->queue_no); 5898 qeth_schedule_recovery(card); 5899 return; 5900 } 5901 5902 QETH_CARD_TEXT_(card, 5, "pel%u", bidx); 5903 5904 priv = (struct qeth_qaob_priv1 *)&aob->user1; 5905 /* QAOB hasn't completed yet: */ 5906 if (xchg(&priv->state, QETH_QAOB_PENDING) != QETH_QAOB_DONE) { 5907 qeth_notify_skbs(queue, buffer, TX_NOTIFY_PENDING); 5908 5909 /* Prepare the queue slot for immediate re-use: */ 5910 qeth_scrub_qdio_buffer(buffer->buffer, queue->max_elements); 5911 if (qeth_alloc_out_buf(queue, bidx, GFP_ATOMIC)) { 5912 QETH_CARD_TEXT(card, 2, "outofbuf"); 5913 qeth_schedule_recovery(card); 5914 } 5915 5916 list_add(&buffer->list_entry, &queue->pending_bufs); 5917 /* Skip clearing the buffer: */ 5918 return; 5919 } 5920 5921 /* QAOB already completed: */ 5922 notify = qeth_compute_cq_notification(aob->aorc, 0); 5923 qeth_notify_skbs(queue, buffer, notify); 5924 error = !!aob->aorc; 5925 memset(aob, 0, sizeof(*aob)); 5926 } else if (card->options.cq == QETH_CQ_ENABLED) { 5927 qeth_notify_skbs(queue, buffer, 5928 qeth_compute_cq_notification(sflags, 0)); 5929 } 5930 5931 qeth_clear_output_buffer(queue, buffer, error, budget); 5932 } 5933 5934 static int qeth_tx_poll(struct napi_struct *napi, int budget) 5935 { 5936 struct qeth_qdio_out_q *queue = qeth_napi_to_out_queue(napi); 5937 unsigned int queue_no = queue->queue_no; 5938 struct qeth_card *card = queue->card; 5939 struct net_device *dev = card->dev; 5940 unsigned int work_done = 0; 5941 struct netdev_queue *txq; 5942 5943 if (IS_IQD(card)) 5944 txq = netdev_get_tx_queue(dev, qeth_iqd_translate_txq(dev, queue_no)); 5945 else 5946 txq = netdev_get_tx_queue(dev, queue_no); 5947 5948 while (1) { 5949 unsigned int start, error, i; 5950 unsigned int packets = 0; 5951 unsigned int bytes = 0; 5952 int completed; 5953 5954 qeth_tx_complete_pending_bufs(card, queue, false, budget); 5955 5956 if (qeth_out_queue_is_empty(queue)) { 5957 napi_complete(napi); 5958 return 0; 5959 } 5960 5961 /* Give the CPU a breather: */ 5962 if (work_done >= QDIO_MAX_BUFFERS_PER_Q) { 5963 QETH_TXQ_STAT_INC(queue, completion_yield); 5964 if (napi_complete_done(napi, 0)) 5965 napi_schedule(napi); 5966 return 0; 5967 } 5968 5969 completed = qdio_inspect_output_queue(CARD_DDEV(card), queue_no, 5970 &start, &error); 5971 if (completed <= 0) { 5972 /* Ensure we see TX completion for pending work: */ 5973 if (napi_complete_done(napi, 0) && 5974 !atomic_read(&queue->set_pci_flags_count)) 5975 qeth_tx_arm_timer(queue, queue->rescan_usecs); 5976 return 0; 5977 } 5978 5979 for (i = start; i < start + completed; i++) { 5980 struct qeth_qdio_out_buffer *buffer; 5981 unsigned int bidx = QDIO_BUFNR(i); 5982 5983 buffer = queue->bufs[bidx]; 5984 packets += buffer->frames; 5985 bytes += buffer->bytes; 5986 5987 qeth_handle_send_error(card, buffer, error); 5988 if (IS_IQD(card)) 5989 qeth_iqd_tx_complete(queue, bidx, error, budget); 5990 else 5991 qeth_clear_output_buffer(queue, buffer, error, 5992 budget); 5993 } 5994 5995 atomic_sub(completed, &queue->used_buffers); 5996 work_done += completed; 5997 if (IS_IQD(card)) 5998 netdev_tx_completed_queue(txq, packets, bytes); 5999 else 6000 qeth_check_outbound_queue(queue); 6001 6002 /* xmit may have observed the full-condition, but not yet 6003 * stopped the txq. In which case the code below won't trigger. 6004 * So before returning, xmit will re-check the txq's fill level 6005 * and wake it up if needed. 6006 */ 6007 if (netif_tx_queue_stopped(txq) && 6008 !qeth_out_queue_is_full(queue)) 6009 netif_tx_wake_queue(txq); 6010 } 6011 } 6012 6013 static int qeth_setassparms_inspect_rc(struct qeth_ipa_cmd *cmd) 6014 { 6015 if (!cmd->hdr.return_code) 6016 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code; 6017 return cmd->hdr.return_code; 6018 } 6019 6020 static int qeth_setassparms_get_caps_cb(struct qeth_card *card, 6021 struct qeth_reply *reply, 6022 unsigned long data) 6023 { 6024 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; 6025 struct qeth_ipa_caps *caps = reply->param; 6026 6027 if (qeth_setassparms_inspect_rc(cmd)) 6028 return -EIO; 6029 6030 caps->supported = cmd->data.setassparms.data.caps.supported; 6031 caps->enabled = cmd->data.setassparms.data.caps.enabled; 6032 return 0; 6033 } 6034 6035 int qeth_setassparms_cb(struct qeth_card *card, 6036 struct qeth_reply *reply, unsigned long data) 6037 { 6038 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; 6039 6040 QETH_CARD_TEXT(card, 4, "defadpcb"); 6041 6042 if (cmd->hdr.return_code) 6043 return -EIO; 6044 6045 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code; 6046 if (cmd->hdr.prot_version == QETH_PROT_IPV4) 6047 card->options.ipa4.enabled = cmd->hdr.assists.enabled; 6048 if (cmd->hdr.prot_version == QETH_PROT_IPV6) 6049 card->options.ipa6.enabled = cmd->hdr.assists.enabled; 6050 return 0; 6051 } 6052 EXPORT_SYMBOL_GPL(qeth_setassparms_cb); 6053 6054 struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card, 6055 enum qeth_ipa_funcs ipa_func, 6056 u16 cmd_code, 6057 unsigned int data_length, 6058 enum qeth_prot_versions prot) 6059 { 6060 struct qeth_ipacmd_setassparms *setassparms; 6061 struct qeth_ipacmd_setassparms_hdr *hdr; 6062 struct qeth_cmd_buffer *iob; 6063 6064 QETH_CARD_TEXT(card, 4, "getasscm"); 6065 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETASSPARMS, prot, 6066 data_length + 6067 offsetof(struct qeth_ipacmd_setassparms, 6068 data)); 6069 if (!iob) 6070 return NULL; 6071 6072 setassparms = &__ipa_cmd(iob)->data.setassparms; 6073 setassparms->assist_no = ipa_func; 6074 6075 hdr = &setassparms->hdr; 6076 hdr->length = sizeof(*hdr) + data_length; 6077 hdr->command_code = cmd_code; 6078 return iob; 6079 } 6080 EXPORT_SYMBOL_GPL(qeth_get_setassparms_cmd); 6081 6082 int qeth_send_simple_setassparms_prot(struct qeth_card *card, 6083 enum qeth_ipa_funcs ipa_func, 6084 u16 cmd_code, u32 *data, 6085 enum qeth_prot_versions prot) 6086 { 6087 unsigned int length = data ? SETASS_DATA_SIZEOF(flags_32bit) : 0; 6088 struct qeth_cmd_buffer *iob; 6089 6090 QETH_CARD_TEXT_(card, 4, "simassp%i", prot); 6091 iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code, length, prot); 6092 if (!iob) 6093 return -ENOMEM; 6094 6095 if (data) 6096 __ipa_cmd(iob)->data.setassparms.data.flags_32bit = *data; 6097 return qeth_send_ipa_cmd(card, iob, qeth_setassparms_cb, NULL); 6098 } 6099 EXPORT_SYMBOL_GPL(qeth_send_simple_setassparms_prot); 6100 6101 static void qeth_unregister_dbf_views(void) 6102 { 6103 int x; 6104 6105 for (x = 0; x < QETH_DBF_INFOS; x++) { 6106 debug_unregister(qeth_dbf[x].id); 6107 qeth_dbf[x].id = NULL; 6108 } 6109 } 6110 6111 void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...) 6112 { 6113 char dbf_txt_buf[32]; 6114 va_list args; 6115 6116 if (!debug_level_enabled(id, level)) 6117 return; 6118 va_start(args, fmt); 6119 vscnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args); 6120 va_end(args); 6121 debug_text_event(id, level, dbf_txt_buf); 6122 } 6123 EXPORT_SYMBOL_GPL(qeth_dbf_longtext); 6124 6125 static int qeth_register_dbf_views(void) 6126 { 6127 int ret; 6128 int x; 6129 6130 for (x = 0; x < QETH_DBF_INFOS; x++) { 6131 /* register the areas */ 6132 qeth_dbf[x].id = debug_register(qeth_dbf[x].name, 6133 qeth_dbf[x].pages, 6134 qeth_dbf[x].areas, 6135 qeth_dbf[x].len); 6136 if (qeth_dbf[x].id == NULL) { 6137 qeth_unregister_dbf_views(); 6138 return -ENOMEM; 6139 } 6140 6141 /* register a view */ 6142 ret = debug_register_view(qeth_dbf[x].id, qeth_dbf[x].view); 6143 if (ret) { 6144 qeth_unregister_dbf_views(); 6145 return ret; 6146 } 6147 6148 /* set a passing level */ 6149 debug_set_level(qeth_dbf[x].id, qeth_dbf[x].level); 6150 } 6151 6152 return 0; 6153 } 6154 6155 static DEFINE_MUTEX(qeth_mod_mutex); /* for synchronized module loading */ 6156 6157 int qeth_setup_discipline(struct qeth_card *card, 6158 enum qeth_discipline_id discipline) 6159 { 6160 int rc; 6161 6162 mutex_lock(&qeth_mod_mutex); 6163 switch (discipline) { 6164 case QETH_DISCIPLINE_LAYER3: 6165 card->discipline = try_then_request_module( 6166 symbol_get(qeth_l3_discipline), "qeth_l3"); 6167 break; 6168 case QETH_DISCIPLINE_LAYER2: 6169 card->discipline = try_then_request_module( 6170 symbol_get(qeth_l2_discipline), "qeth_l2"); 6171 break; 6172 default: 6173 break; 6174 } 6175 mutex_unlock(&qeth_mod_mutex); 6176 6177 if (!card->discipline) { 6178 dev_err(&card->gdev->dev, "There is no kernel module to " 6179 "support discipline %d\n", discipline); 6180 return -EINVAL; 6181 } 6182 6183 rc = card->discipline->setup(card->gdev); 6184 if (rc) { 6185 if (discipline == QETH_DISCIPLINE_LAYER2) 6186 symbol_put(qeth_l2_discipline); 6187 else 6188 symbol_put(qeth_l3_discipline); 6189 card->discipline = NULL; 6190 6191 return rc; 6192 } 6193 6194 card->options.layer = discipline; 6195 return 0; 6196 } 6197 6198 void qeth_remove_discipline(struct qeth_card *card) 6199 { 6200 card->discipline->remove(card->gdev); 6201 6202 if (IS_LAYER2(card)) 6203 symbol_put(qeth_l2_discipline); 6204 else 6205 symbol_put(qeth_l3_discipline); 6206 card->options.layer = QETH_DISCIPLINE_UNDETERMINED; 6207 card->discipline = NULL; 6208 } 6209 6210 static const struct device_type qeth_generic_devtype = { 6211 .name = "qeth_generic", 6212 }; 6213 6214 #define DBF_NAME_LEN 20 6215 6216 struct qeth_dbf_entry { 6217 char dbf_name[DBF_NAME_LEN]; 6218 debug_info_t *dbf_info; 6219 struct list_head dbf_list; 6220 }; 6221 6222 static LIST_HEAD(qeth_dbf_list); 6223 static DEFINE_MUTEX(qeth_dbf_list_mutex); 6224 6225 static debug_info_t *qeth_get_dbf_entry(char *name) 6226 { 6227 struct qeth_dbf_entry *entry; 6228 debug_info_t *rc = NULL; 6229 6230 mutex_lock(&qeth_dbf_list_mutex); 6231 list_for_each_entry(entry, &qeth_dbf_list, dbf_list) { 6232 if (strcmp(entry->dbf_name, name) == 0) { 6233 rc = entry->dbf_info; 6234 break; 6235 } 6236 } 6237 mutex_unlock(&qeth_dbf_list_mutex); 6238 return rc; 6239 } 6240 6241 static int qeth_add_dbf_entry(struct qeth_card *card, char *name) 6242 { 6243 struct qeth_dbf_entry *new_entry; 6244 6245 card->debug = debug_register(name, 2, 1, 8); 6246 if (!card->debug) { 6247 QETH_DBF_TEXT_(SETUP, 2, "%s", "qcdbf"); 6248 goto err; 6249 } 6250 if (debug_register_view(card->debug, &debug_hex_ascii_view)) 6251 goto err_dbg; 6252 new_entry = kzalloc(sizeof(struct qeth_dbf_entry), GFP_KERNEL); 6253 if (!new_entry) 6254 goto err_dbg; 6255 strscpy(new_entry->dbf_name, name, sizeof(new_entry->dbf_name)); 6256 new_entry->dbf_info = card->debug; 6257 mutex_lock(&qeth_dbf_list_mutex); 6258 list_add(&new_entry->dbf_list, &qeth_dbf_list); 6259 mutex_unlock(&qeth_dbf_list_mutex); 6260 6261 return 0; 6262 6263 err_dbg: 6264 debug_unregister(card->debug); 6265 err: 6266 return -ENOMEM; 6267 } 6268 6269 static void qeth_clear_dbf_list(void) 6270 { 6271 struct qeth_dbf_entry *entry, *tmp; 6272 6273 mutex_lock(&qeth_dbf_list_mutex); 6274 list_for_each_entry_safe(entry, tmp, &qeth_dbf_list, dbf_list) { 6275 list_del(&entry->dbf_list); 6276 debug_unregister(entry->dbf_info); 6277 kfree(entry); 6278 } 6279 mutex_unlock(&qeth_dbf_list_mutex); 6280 } 6281 6282 static struct net_device *qeth_alloc_netdev(struct qeth_card *card) 6283 { 6284 struct net_device *dev; 6285 struct qeth_priv *priv; 6286 6287 switch (card->info.type) { 6288 case QETH_CARD_TYPE_IQD: 6289 dev = alloc_netdev_mqs(sizeof(*priv), "hsi%d", NET_NAME_UNKNOWN, 6290 ether_setup, QETH_MAX_OUT_QUEUES, 1); 6291 break; 6292 case QETH_CARD_TYPE_OSM: 6293 dev = alloc_etherdev(sizeof(*priv)); 6294 break; 6295 default: 6296 dev = alloc_etherdev_mqs(sizeof(*priv), QETH_MAX_OUT_QUEUES, 1); 6297 } 6298 6299 if (!dev) 6300 return NULL; 6301 6302 priv = netdev_priv(dev); 6303 priv->rx_copybreak = QETH_RX_COPYBREAK; 6304 priv->tx_wanted_queues = IS_IQD(card) ? QETH_IQD_MIN_TXQ : 1; 6305 6306 dev->ml_priv = card; 6307 dev->watchdog_timeo = QETH_TX_TIMEOUT; 6308 dev->min_mtu = 576; 6309 /* initialized when device first goes online: */ 6310 dev->max_mtu = 0; 6311 dev->mtu = 0; 6312 SET_NETDEV_DEV(dev, &card->gdev->dev); 6313 netif_carrier_off(dev); 6314 6315 dev->ethtool_ops = &qeth_ethtool_ops; 6316 dev->priv_flags &= ~IFF_TX_SKB_SHARING; 6317 dev->hw_features |= NETIF_F_SG; 6318 dev->vlan_features |= NETIF_F_SG; 6319 if (IS_IQD(card)) 6320 dev->features |= NETIF_F_SG; 6321 6322 return dev; 6323 } 6324 6325 struct net_device *qeth_clone_netdev(struct net_device *orig) 6326 { 6327 struct net_device *clone = qeth_alloc_netdev(orig->ml_priv); 6328 6329 if (!clone) 6330 return NULL; 6331 6332 clone->dev_port = orig->dev_port; 6333 return clone; 6334 } 6335 6336 static int qeth_core_probe_device(struct ccwgroup_device *gdev) 6337 { 6338 struct qeth_card *card; 6339 struct device *dev; 6340 int rc; 6341 enum qeth_discipline_id enforced_disc; 6342 char dbf_name[DBF_NAME_LEN]; 6343 6344 QETH_DBF_TEXT(SETUP, 2, "probedev"); 6345 6346 dev = &gdev->dev; 6347 if (!get_device(dev)) 6348 return -ENODEV; 6349 6350 QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev)); 6351 6352 card = qeth_alloc_card(gdev); 6353 if (!card) { 6354 QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM); 6355 rc = -ENOMEM; 6356 goto err_dev; 6357 } 6358 6359 scnprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s", 6360 dev_name(&gdev->dev)); 6361 card->debug = qeth_get_dbf_entry(dbf_name); 6362 if (!card->debug) { 6363 rc = qeth_add_dbf_entry(card, dbf_name); 6364 if (rc) 6365 goto err_card; 6366 } 6367 6368 qeth_setup_card(card); 6369 card->dev = qeth_alloc_netdev(card); 6370 if (!card->dev) { 6371 rc = -ENOMEM; 6372 goto err_card; 6373 } 6374 6375 qeth_determine_capabilities(card); 6376 qeth_set_blkt_defaults(card); 6377 6378 card->qdio.in_q = qeth_alloc_qdio_queue(); 6379 if (!card->qdio.in_q) { 6380 rc = -ENOMEM; 6381 goto err_rx_queue; 6382 } 6383 6384 card->qdio.no_out_queues = card->dev->num_tx_queues; 6385 rc = qeth_update_from_chp_desc(card); 6386 if (rc) 6387 goto err_chp_desc; 6388 6389 gdev->dev.groups = qeth_dev_groups; 6390 6391 enforced_disc = qeth_enforce_discipline(card); 6392 switch (enforced_disc) { 6393 case QETH_DISCIPLINE_UNDETERMINED: 6394 gdev->dev.type = &qeth_generic_devtype; 6395 break; 6396 default: 6397 card->info.layer_enforced = true; 6398 /* It's so early that we don't need the discipline_mutex yet. */ 6399 rc = qeth_setup_discipline(card, enforced_disc); 6400 if (rc) 6401 goto err_setup_disc; 6402 6403 break; 6404 } 6405 6406 return 0; 6407 6408 err_setup_disc: 6409 err_chp_desc: 6410 qeth_free_qdio_queue(card->qdio.in_q); 6411 err_rx_queue: 6412 free_netdev(card->dev); 6413 err_card: 6414 qeth_core_free_card(card); 6415 err_dev: 6416 put_device(dev); 6417 return rc; 6418 } 6419 6420 static void qeth_core_remove_device(struct ccwgroup_device *gdev) 6421 { 6422 struct qeth_card *card = dev_get_drvdata(&gdev->dev); 6423 6424 QETH_CARD_TEXT(card, 2, "removedv"); 6425 6426 mutex_lock(&card->discipline_mutex); 6427 if (card->discipline) 6428 qeth_remove_discipline(card); 6429 mutex_unlock(&card->discipline_mutex); 6430 6431 qeth_free_qdio_queues(card); 6432 6433 qeth_free_qdio_queue(card->qdio.in_q); 6434 free_netdev(card->dev); 6435 qeth_core_free_card(card); 6436 put_device(&gdev->dev); 6437 } 6438 6439 static int qeth_core_set_online(struct ccwgroup_device *gdev) 6440 { 6441 struct qeth_card *card = dev_get_drvdata(&gdev->dev); 6442 int rc = 0; 6443 enum qeth_discipline_id def_discipline; 6444 6445 mutex_lock(&card->discipline_mutex); 6446 if (!card->discipline) { 6447 def_discipline = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 : 6448 QETH_DISCIPLINE_LAYER2; 6449 rc = qeth_setup_discipline(card, def_discipline); 6450 if (rc) 6451 goto err; 6452 } 6453 6454 rc = qeth_set_online(card, card->discipline); 6455 6456 err: 6457 mutex_unlock(&card->discipline_mutex); 6458 return rc; 6459 } 6460 6461 static int qeth_core_set_offline(struct ccwgroup_device *gdev) 6462 { 6463 struct qeth_card *card = dev_get_drvdata(&gdev->dev); 6464 int rc; 6465 6466 mutex_lock(&card->discipline_mutex); 6467 rc = qeth_set_offline(card, card->discipline, false); 6468 mutex_unlock(&card->discipline_mutex); 6469 6470 return rc; 6471 } 6472 6473 static void qeth_core_shutdown(struct ccwgroup_device *gdev) 6474 { 6475 struct qeth_card *card = dev_get_drvdata(&gdev->dev); 6476 6477 qeth_set_allowed_threads(card, 0, 1); 6478 if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap) 6479 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM); 6480 qeth_qdio_clear_card(card, 0); 6481 qeth_drain_output_queues(card); 6482 qdio_free(CARD_DDEV(card)); 6483 } 6484 6485 static ssize_t group_store(struct device_driver *ddrv, const char *buf, 6486 size_t count) 6487 { 6488 int err; 6489 6490 err = ccwgroup_create_dev(qeth_core_root_dev, to_ccwgroupdrv(ddrv), 3, 6491 buf); 6492 6493 return err ? err : count; 6494 } 6495 static DRIVER_ATTR_WO(group); 6496 6497 static struct attribute *qeth_drv_attrs[] = { 6498 &driver_attr_group.attr, 6499 NULL, 6500 }; 6501 static struct attribute_group qeth_drv_attr_group = { 6502 .attrs = qeth_drv_attrs, 6503 }; 6504 static const struct attribute_group *qeth_drv_attr_groups[] = { 6505 &qeth_drv_attr_group, 6506 NULL, 6507 }; 6508 6509 static struct ccwgroup_driver qeth_core_ccwgroup_driver = { 6510 .driver = { 6511 .groups = qeth_drv_attr_groups, 6512 .owner = THIS_MODULE, 6513 .name = "qeth", 6514 }, 6515 .ccw_driver = &qeth_ccw_driver, 6516 .setup = qeth_core_probe_device, 6517 .remove = qeth_core_remove_device, 6518 .set_online = qeth_core_set_online, 6519 .set_offline = qeth_core_set_offline, 6520 .shutdown = qeth_core_shutdown, 6521 }; 6522 6523 int qeth_siocdevprivate(struct net_device *dev, struct ifreq *rq, void __user *data, int cmd) 6524 { 6525 struct qeth_card *card = dev->ml_priv; 6526 int rc = 0; 6527 6528 switch (cmd) { 6529 case SIOC_QETH_ADP_SET_SNMP_CONTROL: 6530 rc = qeth_snmp_command(card, data); 6531 break; 6532 case SIOC_QETH_GET_CARD_TYPE: 6533 if ((IS_OSD(card) || IS_OSM(card) || IS_OSX(card)) && 6534 !IS_VM_NIC(card)) 6535 return 1; 6536 return 0; 6537 case SIOC_QETH_QUERY_OAT: 6538 rc = qeth_query_oat_command(card, data); 6539 break; 6540 default: 6541 rc = -EOPNOTSUPP; 6542 } 6543 if (rc) 6544 QETH_CARD_TEXT_(card, 2, "ioce%x", rc); 6545 return rc; 6546 } 6547 EXPORT_SYMBOL_GPL(qeth_siocdevprivate); 6548 6549 int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) 6550 { 6551 struct qeth_card *card = dev->ml_priv; 6552 struct mii_ioctl_data *mii_data; 6553 int rc = 0; 6554 6555 switch (cmd) { 6556 case SIOCGMIIPHY: 6557 mii_data = if_mii(rq); 6558 mii_data->phy_id = 0; 6559 break; 6560 case SIOCGMIIREG: 6561 mii_data = if_mii(rq); 6562 if (mii_data->phy_id != 0) 6563 rc = -EINVAL; 6564 else 6565 mii_data->val_out = qeth_mdio_read(dev, 6566 mii_data->phy_id, mii_data->reg_num); 6567 break; 6568 default: 6569 return -EOPNOTSUPP; 6570 } 6571 if (rc) 6572 QETH_CARD_TEXT_(card, 2, "ioce%x", rc); 6573 return rc; 6574 } 6575 EXPORT_SYMBOL_GPL(qeth_do_ioctl); 6576 6577 static int qeth_start_csum_cb(struct qeth_card *card, struct qeth_reply *reply, 6578 unsigned long data) 6579 { 6580 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; 6581 u32 *features = reply->param; 6582 6583 if (qeth_setassparms_inspect_rc(cmd)) 6584 return -EIO; 6585 6586 *features = cmd->data.setassparms.data.flags_32bit; 6587 return 0; 6588 } 6589 6590 static int qeth_set_csum_off(struct qeth_card *card, enum qeth_ipa_funcs cstype, 6591 enum qeth_prot_versions prot) 6592 { 6593 return qeth_send_simple_setassparms_prot(card, cstype, IPA_CMD_ASS_STOP, 6594 NULL, prot); 6595 } 6596 6597 static int qeth_set_csum_on(struct qeth_card *card, enum qeth_ipa_funcs cstype, 6598 enum qeth_prot_versions prot, u8 *lp2lp) 6599 { 6600 u32 required_features = QETH_IPA_CHECKSUM_UDP | QETH_IPA_CHECKSUM_TCP; 6601 struct qeth_cmd_buffer *iob; 6602 struct qeth_ipa_caps caps; 6603 u32 features; 6604 int rc; 6605 6606 /* some L3 HW requires combined L3+L4 csum offload: */ 6607 if (IS_LAYER3(card) && prot == QETH_PROT_IPV4 && 6608 cstype == IPA_OUTBOUND_CHECKSUM) 6609 required_features |= QETH_IPA_CHECKSUM_IP_HDR; 6610 6611 iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_START, 0, 6612 prot); 6613 if (!iob) 6614 return -ENOMEM; 6615 6616 rc = qeth_send_ipa_cmd(card, iob, qeth_start_csum_cb, &features); 6617 if (rc) 6618 return rc; 6619 6620 if ((required_features & features) != required_features) { 6621 qeth_set_csum_off(card, cstype, prot); 6622 return -EOPNOTSUPP; 6623 } 6624 6625 iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_ENABLE, 6626 SETASS_DATA_SIZEOF(flags_32bit), 6627 prot); 6628 if (!iob) { 6629 qeth_set_csum_off(card, cstype, prot); 6630 return -ENOMEM; 6631 } 6632 6633 if (features & QETH_IPA_CHECKSUM_LP2LP) 6634 required_features |= QETH_IPA_CHECKSUM_LP2LP; 6635 __ipa_cmd(iob)->data.setassparms.data.flags_32bit = required_features; 6636 rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps); 6637 if (rc) { 6638 qeth_set_csum_off(card, cstype, prot); 6639 return rc; 6640 } 6641 6642 if (!qeth_ipa_caps_supported(&caps, required_features) || 6643 !qeth_ipa_caps_enabled(&caps, required_features)) { 6644 qeth_set_csum_off(card, cstype, prot); 6645 return -EOPNOTSUPP; 6646 } 6647 6648 dev_info(&card->gdev->dev, "HW Checksumming (%sbound IPv%d) enabled\n", 6649 cstype == IPA_INBOUND_CHECKSUM ? "in" : "out", prot); 6650 6651 if (lp2lp) 6652 *lp2lp = qeth_ipa_caps_enabled(&caps, QETH_IPA_CHECKSUM_LP2LP); 6653 6654 return 0; 6655 } 6656 6657 static int qeth_set_ipa_csum(struct qeth_card *card, bool on, int cstype, 6658 enum qeth_prot_versions prot, u8 *lp2lp) 6659 { 6660 return on ? qeth_set_csum_on(card, cstype, prot, lp2lp) : 6661 qeth_set_csum_off(card, cstype, prot); 6662 } 6663 6664 static int qeth_start_tso_cb(struct qeth_card *card, struct qeth_reply *reply, 6665 unsigned long data) 6666 { 6667 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; 6668 struct qeth_tso_start_data *tso_data = reply->param; 6669 6670 if (qeth_setassparms_inspect_rc(cmd)) 6671 return -EIO; 6672 6673 tso_data->mss = cmd->data.setassparms.data.tso.mss; 6674 tso_data->supported = cmd->data.setassparms.data.tso.supported; 6675 return 0; 6676 } 6677 6678 static int qeth_set_tso_off(struct qeth_card *card, 6679 enum qeth_prot_versions prot) 6680 { 6681 return qeth_send_simple_setassparms_prot(card, IPA_OUTBOUND_TSO, 6682 IPA_CMD_ASS_STOP, NULL, prot); 6683 } 6684 6685 static int qeth_set_tso_on(struct qeth_card *card, 6686 enum qeth_prot_versions prot) 6687 { 6688 struct qeth_tso_start_data tso_data; 6689 struct qeth_cmd_buffer *iob; 6690 struct qeth_ipa_caps caps; 6691 int rc; 6692 6693 iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO, 6694 IPA_CMD_ASS_START, 0, prot); 6695 if (!iob) 6696 return -ENOMEM; 6697 6698 rc = qeth_send_ipa_cmd(card, iob, qeth_start_tso_cb, &tso_data); 6699 if (rc) 6700 return rc; 6701 6702 if (!tso_data.mss || !(tso_data.supported & QETH_IPA_LARGE_SEND_TCP)) { 6703 qeth_set_tso_off(card, prot); 6704 return -EOPNOTSUPP; 6705 } 6706 6707 iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO, 6708 IPA_CMD_ASS_ENABLE, 6709 SETASS_DATA_SIZEOF(caps), prot); 6710 if (!iob) { 6711 qeth_set_tso_off(card, prot); 6712 return -ENOMEM; 6713 } 6714 6715 /* enable TSO capability */ 6716 __ipa_cmd(iob)->data.setassparms.data.caps.enabled = 6717 QETH_IPA_LARGE_SEND_TCP; 6718 rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps); 6719 if (rc) { 6720 qeth_set_tso_off(card, prot); 6721 return rc; 6722 } 6723 6724 if (!qeth_ipa_caps_supported(&caps, QETH_IPA_LARGE_SEND_TCP) || 6725 !qeth_ipa_caps_enabled(&caps, QETH_IPA_LARGE_SEND_TCP)) { 6726 qeth_set_tso_off(card, prot); 6727 return -EOPNOTSUPP; 6728 } 6729 6730 dev_info(&card->gdev->dev, "TSOv%u enabled (MSS: %u)\n", prot, 6731 tso_data.mss); 6732 return 0; 6733 } 6734 6735 static int qeth_set_ipa_tso(struct qeth_card *card, bool on, 6736 enum qeth_prot_versions prot) 6737 { 6738 return on ? qeth_set_tso_on(card, prot) : qeth_set_tso_off(card, prot); 6739 } 6740 6741 static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on) 6742 { 6743 int rc_ipv4 = (on) ? -EOPNOTSUPP : 0; 6744 int rc_ipv6; 6745 6746 if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM)) 6747 rc_ipv4 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM, 6748 QETH_PROT_IPV4, NULL); 6749 if (!qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6)) 6750 /* no/one Offload Assist available, so the rc is trivial */ 6751 return rc_ipv4; 6752 6753 rc_ipv6 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM, 6754 QETH_PROT_IPV6, NULL); 6755 6756 if (on) 6757 /* enable: success if any Assist is active */ 6758 return (rc_ipv6) ? rc_ipv4 : 0; 6759 6760 /* disable: failure if any Assist is still active */ 6761 return (rc_ipv6) ? rc_ipv6 : rc_ipv4; 6762 } 6763 6764 /** 6765 * qeth_enable_hw_features() - (Re-)Enable HW functions for device features 6766 * @dev: a net_device 6767 */ 6768 void qeth_enable_hw_features(struct net_device *dev) 6769 { 6770 struct qeth_card *card = dev->ml_priv; 6771 netdev_features_t features; 6772 6773 features = dev->features; 6774 /* force-off any feature that might need an IPA sequence. 6775 * netdev_update_features() will restart them. 6776 */ 6777 dev->features &= ~dev->hw_features; 6778 /* toggle VLAN filter, so that VIDs are re-programmed: */ 6779 if (IS_LAYER2(card) && IS_VM_NIC(card)) { 6780 dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER; 6781 dev->wanted_features |= NETIF_F_HW_VLAN_CTAG_FILTER; 6782 } 6783 netdev_update_features(dev); 6784 if (features != dev->features) 6785 dev_warn(&card->gdev->dev, 6786 "Device recovery failed to restore all offload features\n"); 6787 } 6788 EXPORT_SYMBOL_GPL(qeth_enable_hw_features); 6789 6790 static void qeth_check_restricted_features(struct qeth_card *card, 6791 netdev_features_t changed, 6792 netdev_features_t actual) 6793 { 6794 netdev_features_t ipv6_features = NETIF_F_TSO6; 6795 netdev_features_t ipv4_features = NETIF_F_TSO; 6796 6797 if (!card->info.has_lp2lp_cso_v6) 6798 ipv6_features |= NETIF_F_IPV6_CSUM; 6799 if (!card->info.has_lp2lp_cso_v4) 6800 ipv4_features |= NETIF_F_IP_CSUM; 6801 6802 if ((changed & ipv6_features) && !(actual & ipv6_features)) 6803 qeth_flush_local_addrs6(card); 6804 if ((changed & ipv4_features) && !(actual & ipv4_features)) 6805 qeth_flush_local_addrs4(card); 6806 } 6807 6808 int qeth_set_features(struct net_device *dev, netdev_features_t features) 6809 { 6810 struct qeth_card *card = dev->ml_priv; 6811 netdev_features_t changed = dev->features ^ features; 6812 int rc = 0; 6813 6814 QETH_CARD_TEXT(card, 2, "setfeat"); 6815 QETH_CARD_HEX(card, 2, &features, sizeof(features)); 6816 6817 if ((changed & NETIF_F_IP_CSUM)) { 6818 rc = qeth_set_ipa_csum(card, features & NETIF_F_IP_CSUM, 6819 IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV4, 6820 &card->info.has_lp2lp_cso_v4); 6821 if (rc) 6822 changed ^= NETIF_F_IP_CSUM; 6823 } 6824 if (changed & NETIF_F_IPV6_CSUM) { 6825 rc = qeth_set_ipa_csum(card, features & NETIF_F_IPV6_CSUM, 6826 IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV6, 6827 &card->info.has_lp2lp_cso_v6); 6828 if (rc) 6829 changed ^= NETIF_F_IPV6_CSUM; 6830 } 6831 if (changed & NETIF_F_RXCSUM) { 6832 rc = qeth_set_ipa_rx_csum(card, features & NETIF_F_RXCSUM); 6833 if (rc) 6834 changed ^= NETIF_F_RXCSUM; 6835 } 6836 if (changed & NETIF_F_TSO) { 6837 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO, 6838 QETH_PROT_IPV4); 6839 if (rc) 6840 changed ^= NETIF_F_TSO; 6841 } 6842 if (changed & NETIF_F_TSO6) { 6843 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO6, 6844 QETH_PROT_IPV6); 6845 if (rc) 6846 changed ^= NETIF_F_TSO6; 6847 } 6848 6849 qeth_check_restricted_features(card, dev->features ^ features, 6850 dev->features ^ changed); 6851 6852 /* everything changed successfully? */ 6853 if ((dev->features ^ features) == changed) 6854 return 0; 6855 /* something went wrong. save changed features and return error */ 6856 dev->features ^= changed; 6857 return -EIO; 6858 } 6859 EXPORT_SYMBOL_GPL(qeth_set_features); 6860 6861 netdev_features_t qeth_fix_features(struct net_device *dev, 6862 netdev_features_t features) 6863 { 6864 struct qeth_card *card = dev->ml_priv; 6865 6866 QETH_CARD_TEXT(card, 2, "fixfeat"); 6867 if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM)) 6868 features &= ~NETIF_F_IP_CSUM; 6869 if (!qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6)) 6870 features &= ~NETIF_F_IPV6_CSUM; 6871 if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM) && 6872 !qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6)) 6873 features &= ~NETIF_F_RXCSUM; 6874 if (!qeth_is_supported(card, IPA_OUTBOUND_TSO)) 6875 features &= ~NETIF_F_TSO; 6876 if (!qeth_is_supported6(card, IPA_OUTBOUND_TSO)) 6877 features &= ~NETIF_F_TSO6; 6878 6879 QETH_CARD_HEX(card, 2, &features, sizeof(features)); 6880 return features; 6881 } 6882 EXPORT_SYMBOL_GPL(qeth_fix_features); 6883 6884 netdev_features_t qeth_features_check(struct sk_buff *skb, 6885 struct net_device *dev, 6886 netdev_features_t features) 6887 { 6888 struct qeth_card *card = dev->ml_priv; 6889 6890 /* Traffic with local next-hop is not eligible for some offloads: */ 6891 if (skb->ip_summed == CHECKSUM_PARTIAL && 6892 READ_ONCE(card->options.isolation) != ISOLATION_MODE_FWD) { 6893 netdev_features_t restricted = 0; 6894 6895 if (skb_is_gso(skb) && !netif_needs_gso(skb, features)) 6896 restricted |= NETIF_F_ALL_TSO; 6897 6898 switch (vlan_get_protocol(skb)) { 6899 case htons(ETH_P_IP): 6900 if (!card->info.has_lp2lp_cso_v4) 6901 restricted |= NETIF_F_IP_CSUM; 6902 6903 if (restricted && qeth_next_hop_is_local_v4(card, skb)) 6904 features &= ~restricted; 6905 break; 6906 case htons(ETH_P_IPV6): 6907 if (!card->info.has_lp2lp_cso_v6) 6908 restricted |= NETIF_F_IPV6_CSUM; 6909 6910 if (restricted && qeth_next_hop_is_local_v6(card, skb)) 6911 features &= ~restricted; 6912 break; 6913 default: 6914 break; 6915 } 6916 } 6917 6918 /* GSO segmentation builds skbs with 6919 * a (small) linear part for the headers, and 6920 * page frags for the data. 6921 * Compared to a linear skb, the header-only part consumes an 6922 * additional buffer element. This reduces buffer utilization, and 6923 * hurts throughput. So compress small segments into one element. 6924 */ 6925 if (netif_needs_gso(skb, features)) { 6926 /* match skb_segment(): */ 6927 unsigned int doffset = skb->data - skb_mac_header(skb); 6928 unsigned int hsize = skb_shinfo(skb)->gso_size; 6929 unsigned int hroom = skb_headroom(skb); 6930 6931 /* linearize only if resulting skb allocations are order-0: */ 6932 if (SKB_DATA_ALIGN(hroom + doffset + hsize) <= SKB_MAX_HEAD(0)) 6933 features &= ~NETIF_F_SG; 6934 } 6935 6936 return vlan_features_check(skb, features); 6937 } 6938 EXPORT_SYMBOL_GPL(qeth_features_check); 6939 6940 void qeth_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) 6941 { 6942 struct qeth_card *card = dev->ml_priv; 6943 struct qeth_qdio_out_q *queue; 6944 unsigned int i; 6945 6946 QETH_CARD_TEXT(card, 5, "getstat"); 6947 6948 stats->rx_packets = card->stats.rx_packets; 6949 stats->rx_bytes = card->stats.rx_bytes; 6950 stats->rx_errors = card->stats.rx_length_errors + 6951 card->stats.rx_frame_errors + 6952 card->stats.rx_fifo_errors; 6953 stats->rx_dropped = card->stats.rx_dropped_nomem + 6954 card->stats.rx_dropped_notsupp + 6955 card->stats.rx_dropped_runt; 6956 stats->multicast = card->stats.rx_multicast; 6957 stats->rx_length_errors = card->stats.rx_length_errors; 6958 stats->rx_frame_errors = card->stats.rx_frame_errors; 6959 stats->rx_fifo_errors = card->stats.rx_fifo_errors; 6960 6961 for (i = 0; i < card->qdio.no_out_queues; i++) { 6962 queue = card->qdio.out_qs[i]; 6963 6964 stats->tx_packets += queue->stats.tx_packets; 6965 stats->tx_bytes += queue->stats.tx_bytes; 6966 stats->tx_errors += queue->stats.tx_errors; 6967 stats->tx_dropped += queue->stats.tx_dropped; 6968 } 6969 } 6970 EXPORT_SYMBOL_GPL(qeth_get_stats64); 6971 6972 #define TC_IQD_UCAST 0 6973 static void qeth_iqd_set_prio_tc_map(struct net_device *dev, 6974 unsigned int ucast_txqs) 6975 { 6976 unsigned int prio; 6977 6978 /* IQD requires mcast traffic to be placed on a dedicated queue, and 6979 * qeth_iqd_select_queue() deals with this. 6980 * For unicast traffic, we defer the queue selection to the stack. 6981 * By installing a trivial prio map that spans over only the unicast 6982 * queues, we can encourage the stack to spread the ucast traffic evenly 6983 * without selecting the mcast queue. 6984 */ 6985 6986 /* One traffic class, spanning over all active ucast queues: */ 6987 netdev_set_num_tc(dev, 1); 6988 netdev_set_tc_queue(dev, TC_IQD_UCAST, ucast_txqs, 6989 QETH_IQD_MIN_UCAST_TXQ); 6990 6991 /* Map all priorities to this traffic class: */ 6992 for (prio = 0; prio <= TC_BITMASK; prio++) 6993 netdev_set_prio_tc_map(dev, prio, TC_IQD_UCAST); 6994 } 6995 6996 int qeth_set_real_num_tx_queues(struct qeth_card *card, unsigned int count) 6997 { 6998 struct net_device *dev = card->dev; 6999 int rc; 7000 7001 /* Per netif_setup_tc(), adjust the mapping first: */ 7002 if (IS_IQD(card)) 7003 qeth_iqd_set_prio_tc_map(dev, count - 1); 7004 7005 rc = netif_set_real_num_tx_queues(dev, count); 7006 7007 if (rc && IS_IQD(card)) 7008 qeth_iqd_set_prio_tc_map(dev, dev->real_num_tx_queues - 1); 7009 7010 return rc; 7011 } 7012 EXPORT_SYMBOL_GPL(qeth_set_real_num_tx_queues); 7013 7014 u16 qeth_iqd_select_queue(struct net_device *dev, struct sk_buff *skb, 7015 u8 cast_type, struct net_device *sb_dev) 7016 { 7017 u16 txq; 7018 7019 if (cast_type != RTN_UNICAST) 7020 return QETH_IQD_MCAST_TXQ; 7021 if (dev->real_num_tx_queues == QETH_IQD_MIN_TXQ) 7022 return QETH_IQD_MIN_UCAST_TXQ; 7023 7024 txq = netdev_pick_tx(dev, skb, sb_dev); 7025 return (txq == QETH_IQD_MCAST_TXQ) ? QETH_IQD_MIN_UCAST_TXQ : txq; 7026 } 7027 EXPORT_SYMBOL_GPL(qeth_iqd_select_queue); 7028 7029 u16 qeth_osa_select_queue(struct net_device *dev, struct sk_buff *skb, 7030 struct net_device *sb_dev) 7031 { 7032 struct qeth_card *card = dev->ml_priv; 7033 7034 if (qeth_uses_tx_prio_queueing(card)) 7035 return qeth_get_priority_queue(card, skb); 7036 7037 return netdev_pick_tx(dev, skb, sb_dev); 7038 } 7039 EXPORT_SYMBOL_GPL(qeth_osa_select_queue); 7040 7041 int qeth_open(struct net_device *dev) 7042 { 7043 struct qeth_card *card = dev->ml_priv; 7044 struct qeth_qdio_out_q *queue; 7045 unsigned int i; 7046 7047 QETH_CARD_TEXT(card, 4, "qethopen"); 7048 7049 card->data.state = CH_STATE_UP; 7050 netif_tx_start_all_queues(dev); 7051 7052 qeth_for_each_output_queue(card, queue, i) { 7053 netif_napi_add_tx(dev, &queue->napi, qeth_tx_poll); 7054 napi_enable(&queue->napi); 7055 } 7056 napi_enable(&card->napi); 7057 7058 local_bh_disable(); 7059 qeth_for_each_output_queue(card, queue, i) { 7060 napi_schedule(&queue->napi); 7061 } 7062 napi_schedule(&card->napi); 7063 /* kick-start the NAPI softirq: */ 7064 local_bh_enable(); 7065 7066 return 0; 7067 } 7068 EXPORT_SYMBOL_GPL(qeth_open); 7069 7070 int qeth_stop(struct net_device *dev) 7071 { 7072 struct qeth_card *card = dev->ml_priv; 7073 struct qeth_qdio_out_q *queue; 7074 unsigned int i; 7075 7076 QETH_CARD_TEXT(card, 4, "qethstop"); 7077 7078 napi_disable(&card->napi); 7079 cancel_delayed_work_sync(&card->buffer_reclaim_work); 7080 qdio_stop_irq(CARD_DDEV(card)); 7081 7082 /* Quiesce the NAPI instances: */ 7083 qeth_for_each_output_queue(card, queue, i) 7084 napi_disable(&queue->napi); 7085 7086 /* Stop .ndo_start_xmit, might still access queue->napi. */ 7087 netif_tx_disable(dev); 7088 7089 qeth_for_each_output_queue(card, queue, i) { 7090 timer_delete_sync(&queue->timer); 7091 /* Queues may get re-allocated, so remove the NAPIs. */ 7092 netif_napi_del(&queue->napi); 7093 } 7094 7095 return 0; 7096 } 7097 EXPORT_SYMBOL_GPL(qeth_stop); 7098 7099 static int __init qeth_core_init(void) 7100 { 7101 int rc; 7102 7103 pr_info("loading core functions\n"); 7104 7105 qeth_debugfs_root = debugfs_create_dir("qeth", NULL); 7106 7107 rc = qeth_register_dbf_views(); 7108 if (rc) 7109 goto dbf_err; 7110 qeth_core_root_dev = root_device_register("qeth"); 7111 rc = PTR_ERR_OR_ZERO(qeth_core_root_dev); 7112 if (rc) 7113 goto register_err; 7114 qeth_core_header_cache = 7115 kmem_cache_create("qeth_hdr", QETH_HDR_CACHE_OBJ_SIZE, 7116 roundup_pow_of_two(QETH_HDR_CACHE_OBJ_SIZE), 7117 0, NULL); 7118 if (!qeth_core_header_cache) { 7119 rc = -ENOMEM; 7120 goto slab_err; 7121 } 7122 qeth_qdio_outbuf_cache = kmem_cache_create("qeth_buf", 7123 sizeof(struct qeth_qdio_out_buffer), 0, 0, NULL); 7124 if (!qeth_qdio_outbuf_cache) { 7125 rc = -ENOMEM; 7126 goto cqslab_err; 7127 } 7128 7129 qeth_qaob_cache = kmem_cache_create("qeth_qaob", 7130 sizeof(struct qaob), 7131 sizeof(struct qaob), 7132 0, NULL); 7133 if (!qeth_qaob_cache) { 7134 rc = -ENOMEM; 7135 goto qaob_err; 7136 } 7137 7138 rc = ccw_driver_register(&qeth_ccw_driver); 7139 if (rc) 7140 goto ccw_err; 7141 rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver); 7142 if (rc) 7143 goto ccwgroup_err; 7144 7145 return 0; 7146 7147 ccwgroup_err: 7148 ccw_driver_unregister(&qeth_ccw_driver); 7149 ccw_err: 7150 kmem_cache_destroy(qeth_qaob_cache); 7151 qaob_err: 7152 kmem_cache_destroy(qeth_qdio_outbuf_cache); 7153 cqslab_err: 7154 kmem_cache_destroy(qeth_core_header_cache); 7155 slab_err: 7156 root_device_unregister(qeth_core_root_dev); 7157 register_err: 7158 qeth_unregister_dbf_views(); 7159 dbf_err: 7160 debugfs_remove_recursive(qeth_debugfs_root); 7161 pr_err("Initializing the qeth device driver failed\n"); 7162 return rc; 7163 } 7164 7165 static void __exit qeth_core_exit(void) 7166 { 7167 qeth_clear_dbf_list(); 7168 ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver); 7169 ccw_driver_unregister(&qeth_ccw_driver); 7170 kmem_cache_destroy(qeth_qaob_cache); 7171 kmem_cache_destroy(qeth_qdio_outbuf_cache); 7172 kmem_cache_destroy(qeth_core_header_cache); 7173 root_device_unregister(qeth_core_root_dev); 7174 qeth_unregister_dbf_views(); 7175 debugfs_remove_recursive(qeth_debugfs_root); 7176 pr_info("core functions removed\n"); 7177 } 7178 7179 module_init(qeth_core_init); 7180 module_exit(qeth_core_exit); 7181 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>"); 7182 MODULE_DESCRIPTION("qeth core functions"); 7183 MODULE_LICENSE("GPL"); 7184