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