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Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
[mirror_ubuntu-hirsute-kernel.git] / drivers / s390 / net / qeth_core_main.c
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright IBM Corp. 2007, 2009
4 * Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
5 * Frank Pavlic <fpavlic@de.ibm.com>,
6 * Thomas Spatzier <tspat@de.ibm.com>,
7 * Frank Blaschka <frank.blaschka@de.ibm.com>
8 */
9
10 #define KMSG_COMPONENT "qeth"
11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
12
13 #include <linux/compat.h>
14 #include <linux/module.h>
15 #include <linux/moduleparam.h>
16 #include <linux/string.h>
17 #include <linux/errno.h>
18 #include <linux/kernel.h>
19 #include <linux/log2.h>
20 #include <linux/io.h>
21 #include <linux/ip.h>
22 #include <linux/tcp.h>
23 #include <linux/mii.h>
24 #include <linux/mm.h>
25 #include <linux/kthread.h>
26 #include <linux/slab.h>
27 #include <linux/if_vlan.h>
28 #include <linux/netdevice.h>
29 #include <linux/netdev_features.h>
30 #include <linux/rcutree.h>
31 #include <linux/skbuff.h>
32 #include <linux/vmalloc.h>
33
34 #include <net/iucv/af_iucv.h>
35 #include <net/dsfield.h>
36
37 #include <asm/ebcdic.h>
38 #include <asm/chpid.h>
39 #include <asm/sysinfo.h>
40 #include <asm/diag.h>
41 #include <asm/cio.h>
42 #include <asm/ccwdev.h>
43 #include <asm/cpcmd.h>
44
45 #include "qeth_core.h"
46
47 struct qeth_dbf_info qeth_dbf[QETH_DBF_INFOS] = {
48 /* define dbf - Name, Pages, Areas, Maxlen, Level, View, Handle */
49 /* N P A M L V H */
50 [QETH_DBF_SETUP] = {"qeth_setup",
51 8, 1, 8, 5, &debug_hex_ascii_view, NULL},
52 [QETH_DBF_MSG] = {"qeth_msg", 8, 1, 11 * sizeof(long), 3,
53 &debug_sprintf_view, NULL},
54 [QETH_DBF_CTRL] = {"qeth_control",
55 8, 1, QETH_DBF_CTRL_LEN, 5, &debug_hex_ascii_view, NULL},
56 };
57 EXPORT_SYMBOL_GPL(qeth_dbf);
58
59 struct kmem_cache *qeth_core_header_cache;
60 EXPORT_SYMBOL_GPL(qeth_core_header_cache);
61 static struct kmem_cache *qeth_qdio_outbuf_cache;
62
63 static struct device *qeth_core_root_dev;
64 static struct dentry *qeth_debugfs_root;
65 static struct lock_class_key qdio_out_skb_queue_key;
66
67 static void qeth_issue_next_read_cb(struct qeth_card *card,
68 struct qeth_cmd_buffer *iob,
69 unsigned int data_length);
70 static int qeth_qdio_establish(struct qeth_card *);
71 static void qeth_free_qdio_queues(struct qeth_card *card);
72 static void qeth_notify_skbs(struct qeth_qdio_out_q *queue,
73 struct qeth_qdio_out_buffer *buf,
74 enum iucv_tx_notify notification);
75 static void qeth_tx_complete_buf(struct qeth_qdio_out_buffer *buf, bool error,
76 int budget);
77 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *, int);
78
79 static void qeth_close_dev_handler(struct work_struct *work)
80 {
81 struct qeth_card *card;
82
83 card = container_of(work, struct qeth_card, close_dev_work);
84 QETH_CARD_TEXT(card, 2, "cldevhdl");
85 ccwgroup_set_offline(card->gdev);
86 }
87
88 static const char *qeth_get_cardname(struct qeth_card *card)
89 {
90 if (IS_VM_NIC(card)) {
91 switch (card->info.type) {
92 case QETH_CARD_TYPE_OSD:
93 return " Virtual NIC QDIO";
94 case QETH_CARD_TYPE_IQD:
95 return " Virtual NIC Hiper";
96 case QETH_CARD_TYPE_OSM:
97 return " Virtual NIC QDIO - OSM";
98 case QETH_CARD_TYPE_OSX:
99 return " Virtual NIC QDIO - OSX";
100 default:
101 return " unknown";
102 }
103 } else {
104 switch (card->info.type) {
105 case QETH_CARD_TYPE_OSD:
106 return " OSD Express";
107 case QETH_CARD_TYPE_IQD:
108 return " HiperSockets";
109 case QETH_CARD_TYPE_OSN:
110 return " OSN QDIO";
111 case QETH_CARD_TYPE_OSM:
112 return " OSM QDIO";
113 case QETH_CARD_TYPE_OSX:
114 return " OSX QDIO";
115 default:
116 return " unknown";
117 }
118 }
119 return " n/a";
120 }
121
122 /* max length to be returned: 14 */
123 const char *qeth_get_cardname_short(struct qeth_card *card)
124 {
125 if (IS_VM_NIC(card)) {
126 switch (card->info.type) {
127 case QETH_CARD_TYPE_OSD:
128 return "Virt.NIC QDIO";
129 case QETH_CARD_TYPE_IQD:
130 return "Virt.NIC Hiper";
131 case QETH_CARD_TYPE_OSM:
132 return "Virt.NIC OSM";
133 case QETH_CARD_TYPE_OSX:
134 return "Virt.NIC OSX";
135 default:
136 return "unknown";
137 }
138 } else {
139 switch (card->info.type) {
140 case QETH_CARD_TYPE_OSD:
141 switch (card->info.link_type) {
142 case QETH_LINK_TYPE_FAST_ETH:
143 return "OSD_100";
144 case QETH_LINK_TYPE_HSTR:
145 return "HSTR";
146 case QETH_LINK_TYPE_GBIT_ETH:
147 return "OSD_1000";
148 case QETH_LINK_TYPE_10GBIT_ETH:
149 return "OSD_10GIG";
150 case QETH_LINK_TYPE_25GBIT_ETH:
151 return "OSD_25GIG";
152 case QETH_LINK_TYPE_LANE_ETH100:
153 return "OSD_FE_LANE";
154 case QETH_LINK_TYPE_LANE_TR:
155 return "OSD_TR_LANE";
156 case QETH_LINK_TYPE_LANE_ETH1000:
157 return "OSD_GbE_LANE";
158 case QETH_LINK_TYPE_LANE:
159 return "OSD_ATM_LANE";
160 default:
161 return "OSD_Express";
162 }
163 case QETH_CARD_TYPE_IQD:
164 return "HiperSockets";
165 case QETH_CARD_TYPE_OSN:
166 return "OSN";
167 case QETH_CARD_TYPE_OSM:
168 return "OSM_1000";
169 case QETH_CARD_TYPE_OSX:
170 return "OSX_10GIG";
171 default:
172 return "unknown";
173 }
174 }
175 return "n/a";
176 }
177
178 void qeth_set_allowed_threads(struct qeth_card *card, unsigned long threads,
179 int clear_start_mask)
180 {
181 unsigned long flags;
182
183 spin_lock_irqsave(&card->thread_mask_lock, flags);
184 card->thread_allowed_mask = threads;
185 if (clear_start_mask)
186 card->thread_start_mask &= threads;
187 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
188 wake_up(&card->wait_q);
189 }
190 EXPORT_SYMBOL_GPL(qeth_set_allowed_threads);
191
192 int qeth_threads_running(struct qeth_card *card, unsigned long threads)
193 {
194 unsigned long flags;
195 int rc = 0;
196
197 spin_lock_irqsave(&card->thread_mask_lock, flags);
198 rc = (card->thread_running_mask & threads);
199 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
200 return rc;
201 }
202 EXPORT_SYMBOL_GPL(qeth_threads_running);
203
204 static void qeth_clear_working_pool_list(struct qeth_card *card)
205 {
206 struct qeth_buffer_pool_entry *pool_entry, *tmp;
207 struct qeth_qdio_q *queue = card->qdio.in_q;
208 unsigned int i;
209
210 QETH_CARD_TEXT(card, 5, "clwrklst");
211 list_for_each_entry_safe(pool_entry, tmp,
212 &card->qdio.in_buf_pool.entry_list, list)
213 list_del(&pool_entry->list);
214
215 for (i = 0; i < ARRAY_SIZE(queue->bufs); i++)
216 queue->bufs[i].pool_entry = NULL;
217 }
218
219 static void qeth_free_pool_entry(struct qeth_buffer_pool_entry *entry)
220 {
221 unsigned int i;
222
223 for (i = 0; i < ARRAY_SIZE(entry->elements); i++) {
224 if (entry->elements[i])
225 __free_page(entry->elements[i]);
226 }
227
228 kfree(entry);
229 }
230
231 static void qeth_free_buffer_pool(struct qeth_card *card)
232 {
233 struct qeth_buffer_pool_entry *entry, *tmp;
234
235 list_for_each_entry_safe(entry, tmp, &card->qdio.init_pool.entry_list,
236 init_list) {
237 list_del(&entry->init_list);
238 qeth_free_pool_entry(entry);
239 }
240 }
241
242 static struct qeth_buffer_pool_entry *qeth_alloc_pool_entry(unsigned int pages)
243 {
244 struct qeth_buffer_pool_entry *entry;
245 unsigned int i;
246
247 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
248 if (!entry)
249 return NULL;
250
251 for (i = 0; i < pages; i++) {
252 entry->elements[i] = __dev_alloc_page(GFP_KERNEL);
253
254 if (!entry->elements[i]) {
255 qeth_free_pool_entry(entry);
256 return NULL;
257 }
258 }
259
260 return entry;
261 }
262
263 static int qeth_alloc_buffer_pool(struct qeth_card *card)
264 {
265 unsigned int buf_elements = QETH_MAX_BUFFER_ELEMENTS(card);
266 unsigned int i;
267
268 QETH_CARD_TEXT(card, 5, "alocpool");
269 for (i = 0; i < card->qdio.init_pool.buf_count; ++i) {
270 struct qeth_buffer_pool_entry *entry;
271
272 entry = qeth_alloc_pool_entry(buf_elements);
273 if (!entry) {
274 qeth_free_buffer_pool(card);
275 return -ENOMEM;
276 }
277
278 list_add(&entry->init_list, &card->qdio.init_pool.entry_list);
279 }
280 return 0;
281 }
282
283 int qeth_resize_buffer_pool(struct qeth_card *card, unsigned int count)
284 {
285 unsigned int buf_elements = QETH_MAX_BUFFER_ELEMENTS(card);
286 struct qeth_qdio_buffer_pool *pool = &card->qdio.init_pool;
287 struct qeth_buffer_pool_entry *entry, *tmp;
288 int delta = count - pool->buf_count;
289 LIST_HEAD(entries);
290
291 QETH_CARD_TEXT(card, 2, "realcbp");
292
293 /* Defer until queue is allocated: */
294 if (!card->qdio.in_q)
295 goto out;
296
297 /* Remove entries from the pool: */
298 while (delta < 0) {
299 entry = list_first_entry(&pool->entry_list,
300 struct qeth_buffer_pool_entry,
301 init_list);
302 list_del(&entry->init_list);
303 qeth_free_pool_entry(entry);
304
305 delta++;
306 }
307
308 /* Allocate additional entries: */
309 while (delta > 0) {
310 entry = qeth_alloc_pool_entry(buf_elements);
311 if (!entry) {
312 list_for_each_entry_safe(entry, tmp, &entries,
313 init_list) {
314 list_del(&entry->init_list);
315 qeth_free_pool_entry(entry);
316 }
317
318 return -ENOMEM;
319 }
320
321 list_add(&entry->init_list, &entries);
322
323 delta--;
324 }
325
326 list_splice(&entries, &pool->entry_list);
327
328 out:
329 card->qdio.in_buf_pool.buf_count = count;
330 pool->buf_count = count;
331 return 0;
332 }
333 EXPORT_SYMBOL_GPL(qeth_resize_buffer_pool);
334
335 static void qeth_free_qdio_queue(struct qeth_qdio_q *q)
336 {
337 if (!q)
338 return;
339
340 qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
341 kfree(q);
342 }
343
344 static struct qeth_qdio_q *qeth_alloc_qdio_queue(void)
345 {
346 struct qeth_qdio_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
347 int i;
348
349 if (!q)
350 return NULL;
351
352 if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
353 kfree(q);
354 return NULL;
355 }
356
357 for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i)
358 q->bufs[i].buffer = q->qdio_bufs[i];
359
360 QETH_DBF_HEX(SETUP, 2, &q, sizeof(void *));
361 return q;
362 }
363
364 static int qeth_cq_init(struct qeth_card *card)
365 {
366 int rc;
367
368 if (card->options.cq == QETH_CQ_ENABLED) {
369 QETH_CARD_TEXT(card, 2, "cqinit");
370 qdio_reset_buffers(card->qdio.c_q->qdio_bufs,
371 QDIO_MAX_BUFFERS_PER_Q);
372 card->qdio.c_q->next_buf_to_init = 127;
373 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT,
374 card->qdio.no_in_queues - 1, 0,
375 127);
376 if (rc) {
377 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
378 goto out;
379 }
380 }
381 rc = 0;
382 out:
383 return rc;
384 }
385
386 static int qeth_alloc_cq(struct qeth_card *card)
387 {
388 int rc;
389
390 if (card->options.cq == QETH_CQ_ENABLED) {
391 int i;
392 struct qdio_outbuf_state *outbuf_states;
393
394 QETH_CARD_TEXT(card, 2, "cqon");
395 card->qdio.c_q = qeth_alloc_qdio_queue();
396 if (!card->qdio.c_q) {
397 rc = -1;
398 goto kmsg_out;
399 }
400 card->qdio.no_in_queues = 2;
401 card->qdio.out_bufstates =
402 kcalloc(card->qdio.no_out_queues *
403 QDIO_MAX_BUFFERS_PER_Q,
404 sizeof(struct qdio_outbuf_state),
405 GFP_KERNEL);
406 outbuf_states = card->qdio.out_bufstates;
407 if (outbuf_states == NULL) {
408 rc = -1;
409 goto free_cq_out;
410 }
411 for (i = 0; i < card->qdio.no_out_queues; ++i) {
412 card->qdio.out_qs[i]->bufstates = outbuf_states;
413 outbuf_states += QDIO_MAX_BUFFERS_PER_Q;
414 }
415 } else {
416 QETH_CARD_TEXT(card, 2, "nocq");
417 card->qdio.c_q = NULL;
418 card->qdio.no_in_queues = 1;
419 }
420 QETH_CARD_TEXT_(card, 2, "iqc%d", card->qdio.no_in_queues);
421 rc = 0;
422 out:
423 return rc;
424 free_cq_out:
425 qeth_free_qdio_queue(card->qdio.c_q);
426 card->qdio.c_q = NULL;
427 kmsg_out:
428 dev_err(&card->gdev->dev, "Failed to create completion queue\n");
429 goto out;
430 }
431
432 static void qeth_free_cq(struct qeth_card *card)
433 {
434 if (card->qdio.c_q) {
435 --card->qdio.no_in_queues;
436 qeth_free_qdio_queue(card->qdio.c_q);
437 card->qdio.c_q = NULL;
438 }
439 kfree(card->qdio.out_bufstates);
440 card->qdio.out_bufstates = NULL;
441 }
442
443 static enum iucv_tx_notify qeth_compute_cq_notification(int sbalf15,
444 int delayed)
445 {
446 enum iucv_tx_notify n;
447
448 switch (sbalf15) {
449 case 0:
450 n = delayed ? TX_NOTIFY_DELAYED_OK : TX_NOTIFY_OK;
451 break;
452 case 4:
453 case 16:
454 case 17:
455 case 18:
456 n = delayed ? TX_NOTIFY_DELAYED_UNREACHABLE :
457 TX_NOTIFY_UNREACHABLE;
458 break;
459 default:
460 n = delayed ? TX_NOTIFY_DELAYED_GENERALERROR :
461 TX_NOTIFY_GENERALERROR;
462 break;
463 }
464
465 return n;
466 }
467
468 static void qeth_cleanup_handled_pending(struct qeth_qdio_out_q *q, int bidx,
469 int forced_cleanup)
470 {
471 if (q->card->options.cq != QETH_CQ_ENABLED)
472 return;
473
474 if (q->bufs[bidx]->next_pending != NULL) {
475 struct qeth_qdio_out_buffer *head = q->bufs[bidx];
476 struct qeth_qdio_out_buffer *c = q->bufs[bidx]->next_pending;
477
478 while (c) {
479 if (forced_cleanup ||
480 atomic_read(&c->state) ==
481 QETH_QDIO_BUF_HANDLED_DELAYED) {
482 struct qeth_qdio_out_buffer *f = c;
483
484 QETH_CARD_TEXT(f->q->card, 5, "fp");
485 QETH_CARD_TEXT_(f->q->card, 5, "%lx", (long) f);
486 /* release here to avoid interleaving between
487 outbound tasklet and inbound tasklet
488 regarding notifications and lifecycle */
489 qeth_tx_complete_buf(c, forced_cleanup, 0);
490
491 c = f->next_pending;
492 WARN_ON_ONCE(head->next_pending != f);
493 head->next_pending = c;
494 kmem_cache_free(qeth_qdio_outbuf_cache, f);
495 } else {
496 head = c;
497 c = c->next_pending;
498 }
499
500 }
501 }
502 if (forced_cleanup && (atomic_read(&(q->bufs[bidx]->state)) ==
503 QETH_QDIO_BUF_HANDLED_DELAYED)) {
504 /* for recovery situations */
505 qeth_init_qdio_out_buf(q, bidx);
506 QETH_CARD_TEXT(q->card, 2, "clprecov");
507 }
508 }
509
510 static void qeth_qdio_handle_aob(struct qeth_card *card,
511 unsigned long phys_aob_addr)
512 {
513 struct qaob *aob;
514 struct qeth_qdio_out_buffer *buffer;
515 enum iucv_tx_notify notification;
516 unsigned int i;
517
518 aob = (struct qaob *) phys_to_virt(phys_aob_addr);
519 QETH_CARD_TEXT(card, 5, "haob");
520 QETH_CARD_TEXT_(card, 5, "%lx", phys_aob_addr);
521 buffer = (struct qeth_qdio_out_buffer *) aob->user1;
522 QETH_CARD_TEXT_(card, 5, "%lx", aob->user1);
523
524 if (atomic_cmpxchg(&buffer->state, QETH_QDIO_BUF_PRIMED,
525 QETH_QDIO_BUF_IN_CQ) == QETH_QDIO_BUF_PRIMED) {
526 notification = TX_NOTIFY_OK;
527 } else {
528 WARN_ON_ONCE(atomic_read(&buffer->state) !=
529 QETH_QDIO_BUF_PENDING);
530 atomic_set(&buffer->state, QETH_QDIO_BUF_IN_CQ);
531 notification = TX_NOTIFY_DELAYED_OK;
532 }
533
534 if (aob->aorc != 0) {
535 QETH_CARD_TEXT_(card, 2, "aorc%02X", aob->aorc);
536 notification = qeth_compute_cq_notification(aob->aorc, 1);
537 }
538 qeth_notify_skbs(buffer->q, buffer, notification);
539
540 /* Free dangling allocations. The attached skbs are handled by
541 * qeth_cleanup_handled_pending().
542 */
543 for (i = 0;
544 i < aob->sb_count && i < QETH_MAX_BUFFER_ELEMENTS(card);
545 i++) {
546 void *data = phys_to_virt(aob->sba[i]);
547
548 if (data && buffer->is_header[i])
549 kmem_cache_free(qeth_core_header_cache, data);
550 }
551 atomic_set(&buffer->state, QETH_QDIO_BUF_HANDLED_DELAYED);
552
553 qdio_release_aob(aob);
554 }
555
556 static void qeth_setup_ccw(struct ccw1 *ccw, u8 cmd_code, u8 flags, u32 len,
557 void *data)
558 {
559 ccw->cmd_code = cmd_code;
560 ccw->flags = flags | CCW_FLAG_SLI;
561 ccw->count = len;
562 ccw->cda = (__u32) __pa(data);
563 }
564
565 static int __qeth_issue_next_read(struct qeth_card *card)
566 {
567 struct qeth_cmd_buffer *iob = card->read_cmd;
568 struct qeth_channel *channel = iob->channel;
569 struct ccw1 *ccw = __ccw_from_cmd(iob);
570 int rc;
571
572 QETH_CARD_TEXT(card, 5, "issnxrd");
573 if (channel->state != CH_STATE_UP)
574 return -EIO;
575
576 memset(iob->data, 0, iob->length);
577 qeth_setup_ccw(ccw, CCW_CMD_READ, 0, iob->length, iob->data);
578 iob->callback = qeth_issue_next_read_cb;
579 /* keep the cmd alive after completion: */
580 qeth_get_cmd(iob);
581
582 QETH_CARD_TEXT(card, 6, "noirqpnd");
583 rc = ccw_device_start(channel->ccwdev, ccw, (addr_t) iob, 0, 0);
584 if (!rc) {
585 channel->active_cmd = iob;
586 } else {
587 QETH_DBF_MESSAGE(2, "error %i on device %x when starting next read ccw!\n",
588 rc, CARD_DEVID(card));
589 qeth_unlock_channel(card, channel);
590 qeth_put_cmd(iob);
591 card->read_or_write_problem = 1;
592 qeth_schedule_recovery(card);
593 }
594 return rc;
595 }
596
597 static int qeth_issue_next_read(struct qeth_card *card)
598 {
599 int ret;
600
601 spin_lock_irq(get_ccwdev_lock(CARD_RDEV(card)));
602 ret = __qeth_issue_next_read(card);
603 spin_unlock_irq(get_ccwdev_lock(CARD_RDEV(card)));
604
605 return ret;
606 }
607
608 static void qeth_enqueue_cmd(struct qeth_card *card,
609 struct qeth_cmd_buffer *iob)
610 {
611 spin_lock_irq(&card->lock);
612 list_add_tail(&iob->list, &card->cmd_waiter_list);
613 spin_unlock_irq(&card->lock);
614 }
615
616 static void qeth_dequeue_cmd(struct qeth_card *card,
617 struct qeth_cmd_buffer *iob)
618 {
619 spin_lock_irq(&card->lock);
620 list_del(&iob->list);
621 spin_unlock_irq(&card->lock);
622 }
623
624 void qeth_notify_cmd(struct qeth_cmd_buffer *iob, int reason)
625 {
626 iob->rc = reason;
627 complete(&iob->done);
628 }
629 EXPORT_SYMBOL_GPL(qeth_notify_cmd);
630
631 static void qeth_flush_local_addrs4(struct qeth_card *card)
632 {
633 struct qeth_local_addr *addr;
634 struct hlist_node *tmp;
635 unsigned int i;
636
637 spin_lock_irq(&card->local_addrs4_lock);
638 hash_for_each_safe(card->local_addrs4, i, tmp, addr, hnode) {
639 hash_del_rcu(&addr->hnode);
640 kfree_rcu(addr, rcu);
641 }
642 spin_unlock_irq(&card->local_addrs4_lock);
643 }
644
645 static void qeth_flush_local_addrs6(struct qeth_card *card)
646 {
647 struct qeth_local_addr *addr;
648 struct hlist_node *tmp;
649 unsigned int i;
650
651 spin_lock_irq(&card->local_addrs6_lock);
652 hash_for_each_safe(card->local_addrs6, i, tmp, addr, hnode) {
653 hash_del_rcu(&addr->hnode);
654 kfree_rcu(addr, rcu);
655 }
656 spin_unlock_irq(&card->local_addrs6_lock);
657 }
658
659 static void qeth_flush_local_addrs(struct qeth_card *card)
660 {
661 qeth_flush_local_addrs4(card);
662 qeth_flush_local_addrs6(card);
663 }
664
665 static void qeth_add_local_addrs4(struct qeth_card *card,
666 struct qeth_ipacmd_local_addrs4 *cmd)
667 {
668 unsigned int i;
669
670 if (cmd->addr_length !=
671 sizeof_field(struct qeth_ipacmd_local_addr4, addr)) {
672 dev_err_ratelimited(&card->gdev->dev,
673 "Dropped IPv4 ADD LOCAL ADDR event with bad length %u\n",
674 cmd->addr_length);
675 return;
676 }
677
678 spin_lock(&card->local_addrs4_lock);
679 for (i = 0; i < cmd->count; i++) {
680 unsigned int key = ipv4_addr_hash(cmd->addrs[i].addr);
681 struct qeth_local_addr *addr;
682 bool duplicate = false;
683
684 hash_for_each_possible(card->local_addrs4, addr, hnode, key) {
685 if (addr->addr.s6_addr32[3] == cmd->addrs[i].addr) {
686 duplicate = true;
687 break;
688 }
689 }
690
691 if (duplicate)
692 continue;
693
694 addr = kmalloc(sizeof(*addr), GFP_ATOMIC);
695 if (!addr) {
696 dev_err(&card->gdev->dev,
697 "Failed to allocate local addr object. Traffic to %pI4 might suffer.\n",
698 &cmd->addrs[i].addr);
699 continue;
700 }
701
702 ipv6_addr_set(&addr->addr, 0, 0, 0, cmd->addrs[i].addr);
703 hash_add_rcu(card->local_addrs4, &addr->hnode, key);
704 }
705 spin_unlock(&card->local_addrs4_lock);
706 }
707
708 static void qeth_add_local_addrs6(struct qeth_card *card,
709 struct qeth_ipacmd_local_addrs6 *cmd)
710 {
711 unsigned int i;
712
713 if (cmd->addr_length !=
714 sizeof_field(struct qeth_ipacmd_local_addr6, addr)) {
715 dev_err_ratelimited(&card->gdev->dev,
716 "Dropped IPv6 ADD LOCAL ADDR event with bad length %u\n",
717 cmd->addr_length);
718 return;
719 }
720
721 spin_lock(&card->local_addrs6_lock);
722 for (i = 0; i < cmd->count; i++) {
723 u32 key = ipv6_addr_hash(&cmd->addrs[i].addr);
724 struct qeth_local_addr *addr;
725 bool duplicate = false;
726
727 hash_for_each_possible(card->local_addrs6, addr, hnode, key) {
728 if (ipv6_addr_equal(&addr->addr, &cmd->addrs[i].addr)) {
729 duplicate = true;
730 break;
731 }
732 }
733
734 if (duplicate)
735 continue;
736
737 addr = kmalloc(sizeof(*addr), GFP_ATOMIC);
738 if (!addr) {
739 dev_err(&card->gdev->dev,
740 "Failed to allocate local addr object. Traffic to %pI6c might suffer.\n",
741 &cmd->addrs[i].addr);
742 continue;
743 }
744
745 addr->addr = cmd->addrs[i].addr;
746 hash_add_rcu(card->local_addrs6, &addr->hnode, key);
747 }
748 spin_unlock(&card->local_addrs6_lock);
749 }
750
751 static void qeth_del_local_addrs4(struct qeth_card *card,
752 struct qeth_ipacmd_local_addrs4 *cmd)
753 {
754 unsigned int i;
755
756 if (cmd->addr_length !=
757 sizeof_field(struct qeth_ipacmd_local_addr4, addr)) {
758 dev_err_ratelimited(&card->gdev->dev,
759 "Dropped IPv4 DEL LOCAL ADDR event with bad length %u\n",
760 cmd->addr_length);
761 return;
762 }
763
764 spin_lock(&card->local_addrs4_lock);
765 for (i = 0; i < cmd->count; i++) {
766 struct qeth_ipacmd_local_addr4 *addr = &cmd->addrs[i];
767 unsigned int key = ipv4_addr_hash(addr->addr);
768 struct qeth_local_addr *tmp;
769
770 hash_for_each_possible(card->local_addrs4, tmp, hnode, key) {
771 if (tmp->addr.s6_addr32[3] == addr->addr) {
772 hash_del_rcu(&tmp->hnode);
773 kfree_rcu(tmp, rcu);
774 break;
775 }
776 }
777 }
778 spin_unlock(&card->local_addrs4_lock);
779 }
780
781 static void qeth_del_local_addrs6(struct qeth_card *card,
782 struct qeth_ipacmd_local_addrs6 *cmd)
783 {
784 unsigned int i;
785
786 if (cmd->addr_length !=
787 sizeof_field(struct qeth_ipacmd_local_addr6, addr)) {
788 dev_err_ratelimited(&card->gdev->dev,
789 "Dropped IPv6 DEL LOCAL ADDR event with bad length %u\n",
790 cmd->addr_length);
791 return;
792 }
793
794 spin_lock(&card->local_addrs6_lock);
795 for (i = 0; i < cmd->count; i++) {
796 struct qeth_ipacmd_local_addr6 *addr = &cmd->addrs[i];
797 u32 key = ipv6_addr_hash(&addr->addr);
798 struct qeth_local_addr *tmp;
799
800 hash_for_each_possible(card->local_addrs6, tmp, hnode, key) {
801 if (ipv6_addr_equal(&tmp->addr, &addr->addr)) {
802 hash_del_rcu(&tmp->hnode);
803 kfree_rcu(tmp, rcu);
804 break;
805 }
806 }
807 }
808 spin_unlock(&card->local_addrs6_lock);
809 }
810
811 static bool qeth_next_hop_is_local_v4(struct qeth_card *card,
812 struct sk_buff *skb)
813 {
814 struct qeth_local_addr *tmp;
815 bool is_local = false;
816 unsigned int key;
817 __be32 next_hop;
818
819 if (hash_empty(card->local_addrs4))
820 return false;
821
822 rcu_read_lock();
823 next_hop = qeth_next_hop_v4_rcu(skb, qeth_dst_check_rcu(skb, 4));
824 key = ipv4_addr_hash(next_hop);
825
826 hash_for_each_possible_rcu(card->local_addrs4, tmp, hnode, key) {
827 if (tmp->addr.s6_addr32[3] == next_hop) {
828 is_local = true;
829 break;
830 }
831 }
832 rcu_read_unlock();
833
834 return is_local;
835 }
836
837 static bool qeth_next_hop_is_local_v6(struct qeth_card *card,
838 struct sk_buff *skb)
839 {
840 struct qeth_local_addr *tmp;
841 struct in6_addr *next_hop;
842 bool is_local = false;
843 u32 key;
844
845 if (hash_empty(card->local_addrs6))
846 return false;
847
848 rcu_read_lock();
849 next_hop = qeth_next_hop_v6_rcu(skb, qeth_dst_check_rcu(skb, 6));
850 key = ipv6_addr_hash(next_hop);
851
852 hash_for_each_possible_rcu(card->local_addrs6, tmp, hnode, key) {
853 if (ipv6_addr_equal(&tmp->addr, next_hop)) {
854 is_local = true;
855 break;
856 }
857 }
858 rcu_read_unlock();
859
860 return is_local;
861 }
862
863 static int qeth_debugfs_local_addr_show(struct seq_file *m, void *v)
864 {
865 struct qeth_card *card = m->private;
866 struct qeth_local_addr *tmp;
867 unsigned int i;
868
869 rcu_read_lock();
870 hash_for_each_rcu(card->local_addrs4, i, tmp, hnode)
871 seq_printf(m, "%pI4\n", &tmp->addr.s6_addr32[3]);
872 hash_for_each_rcu(card->local_addrs6, i, tmp, hnode)
873 seq_printf(m, "%pI6c\n", &tmp->addr);
874 rcu_read_unlock();
875
876 return 0;
877 }
878
879 DEFINE_SHOW_ATTRIBUTE(qeth_debugfs_local_addr);
880
881 static void qeth_issue_ipa_msg(struct qeth_ipa_cmd *cmd, int rc,
882 struct qeth_card *card)
883 {
884 const char *ipa_name;
885 int com = cmd->hdr.command;
886
887 ipa_name = qeth_get_ipa_cmd_name(com);
888
889 if (rc)
890 QETH_DBF_MESSAGE(2, "IPA: %s(%#x) for device %x returned %#x \"%s\"\n",
891 ipa_name, com, CARD_DEVID(card), rc,
892 qeth_get_ipa_msg(rc));
893 else
894 QETH_DBF_MESSAGE(5, "IPA: %s(%#x) for device %x succeeded\n",
895 ipa_name, com, CARD_DEVID(card));
896 }
897
898 static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card,
899 struct qeth_ipa_cmd *cmd)
900 {
901 QETH_CARD_TEXT(card, 5, "chkipad");
902
903 if (IS_IPA_REPLY(cmd)) {
904 if (cmd->hdr.command != IPA_CMD_SETCCID &&
905 cmd->hdr.command != IPA_CMD_DELCCID &&
906 cmd->hdr.command != IPA_CMD_MODCCID &&
907 cmd->hdr.command != IPA_CMD_SET_DIAG_ASS)
908 qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
909 return cmd;
910 }
911
912 /* handle unsolicited event: */
913 switch (cmd->hdr.command) {
914 case IPA_CMD_STOPLAN:
915 if (cmd->hdr.return_code == IPA_RC_VEPA_TO_VEB_TRANSITION) {
916 dev_err(&card->gdev->dev,
917 "Interface %s is down because the adjacent port is no longer in reflective relay mode\n",
918 netdev_name(card->dev));
919 schedule_work(&card->close_dev_work);
920 } else {
921 dev_warn(&card->gdev->dev,
922 "The link for interface %s on CHPID 0x%X failed\n",
923 netdev_name(card->dev), card->info.chpid);
924 qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
925 netif_carrier_off(card->dev);
926 }
927 return NULL;
928 case IPA_CMD_STARTLAN:
929 dev_info(&card->gdev->dev,
930 "The link for %s on CHPID 0x%X has been restored\n",
931 netdev_name(card->dev), card->info.chpid);
932 if (card->info.hwtrap)
933 card->info.hwtrap = 2;
934 qeth_schedule_recovery(card);
935 return NULL;
936 case IPA_CMD_SETBRIDGEPORT_IQD:
937 case IPA_CMD_SETBRIDGEPORT_OSA:
938 case IPA_CMD_ADDRESS_CHANGE_NOTIF:
939 if (card->discipline->control_event_handler(card, cmd))
940 return cmd;
941 return NULL;
942 case IPA_CMD_MODCCID:
943 return cmd;
944 case IPA_CMD_REGISTER_LOCAL_ADDR:
945 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
946 qeth_add_local_addrs4(card, &cmd->data.local_addrs4);
947 else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
948 qeth_add_local_addrs6(card, &cmd->data.local_addrs6);
949
950 QETH_CARD_TEXT(card, 3, "irla");
951 return NULL;
952 case IPA_CMD_UNREGISTER_LOCAL_ADDR:
953 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
954 qeth_del_local_addrs4(card, &cmd->data.local_addrs4);
955 else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
956 qeth_del_local_addrs6(card, &cmd->data.local_addrs6);
957
958 QETH_CARD_TEXT(card, 3, "urla");
959 return NULL;
960 default:
961 QETH_DBF_MESSAGE(2, "Received data is IPA but not a reply!\n");
962 return cmd;
963 }
964 }
965
966 static void qeth_clear_ipacmd_list(struct qeth_card *card)
967 {
968 struct qeth_cmd_buffer *iob;
969 unsigned long flags;
970
971 QETH_CARD_TEXT(card, 4, "clipalst");
972
973 spin_lock_irqsave(&card->lock, flags);
974 list_for_each_entry(iob, &card->cmd_waiter_list, list)
975 qeth_notify_cmd(iob, -ECANCELED);
976 spin_unlock_irqrestore(&card->lock, flags);
977 }
978
979 static int qeth_check_idx_response(struct qeth_card *card,
980 unsigned char *buffer)
981 {
982 QETH_DBF_HEX(CTRL, 2, buffer, QETH_DBF_CTRL_LEN);
983 if ((buffer[2] & QETH_IDX_TERMINATE_MASK) == QETH_IDX_TERMINATE) {
984 QETH_DBF_MESSAGE(2, "received an IDX TERMINATE with cause code %#04x\n",
985 buffer[4]);
986 QETH_CARD_TEXT(card, 2, "ckidxres");
987 QETH_CARD_TEXT(card, 2, " idxterm");
988 QETH_CARD_TEXT_(card, 2, "rc%x", buffer[4]);
989 if (buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT ||
990 buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT_VM) {
991 dev_err(&card->gdev->dev,
992 "The device does not support the configured transport mode\n");
993 return -EPROTONOSUPPORT;
994 }
995 return -EIO;
996 }
997 return 0;
998 }
999
1000 void qeth_put_cmd(struct qeth_cmd_buffer *iob)
1001 {
1002 if (refcount_dec_and_test(&iob->ref_count)) {
1003 kfree(iob->data);
1004 kfree(iob);
1005 }
1006 }
1007 EXPORT_SYMBOL_GPL(qeth_put_cmd);
1008
1009 static void qeth_release_buffer_cb(struct qeth_card *card,
1010 struct qeth_cmd_buffer *iob,
1011 unsigned int data_length)
1012 {
1013 qeth_put_cmd(iob);
1014 }
1015
1016 static void qeth_cancel_cmd(struct qeth_cmd_buffer *iob, int rc)
1017 {
1018 qeth_notify_cmd(iob, rc);
1019 qeth_put_cmd(iob);
1020 }
1021
1022 struct qeth_cmd_buffer *qeth_alloc_cmd(struct qeth_channel *channel,
1023 unsigned int length, unsigned int ccws,
1024 long timeout)
1025 {
1026 struct qeth_cmd_buffer *iob;
1027
1028 if (length > QETH_BUFSIZE)
1029 return NULL;
1030
1031 iob = kzalloc(sizeof(*iob), GFP_KERNEL);
1032 if (!iob)
1033 return NULL;
1034
1035 iob->data = kzalloc(ALIGN(length, 8) + ccws * sizeof(struct ccw1),
1036 GFP_KERNEL | GFP_DMA);
1037 if (!iob->data) {
1038 kfree(iob);
1039 return NULL;
1040 }
1041
1042 init_completion(&iob->done);
1043 spin_lock_init(&iob->lock);
1044 INIT_LIST_HEAD(&iob->list);
1045 refcount_set(&iob->ref_count, 1);
1046 iob->channel = channel;
1047 iob->timeout = timeout;
1048 iob->length = length;
1049 return iob;
1050 }
1051 EXPORT_SYMBOL_GPL(qeth_alloc_cmd);
1052
1053 static void qeth_issue_next_read_cb(struct qeth_card *card,
1054 struct qeth_cmd_buffer *iob,
1055 unsigned int data_length)
1056 {
1057 struct qeth_cmd_buffer *request = NULL;
1058 struct qeth_ipa_cmd *cmd = NULL;
1059 struct qeth_reply *reply = NULL;
1060 struct qeth_cmd_buffer *tmp;
1061 unsigned long flags;
1062 int rc = 0;
1063
1064 QETH_CARD_TEXT(card, 4, "sndctlcb");
1065 rc = qeth_check_idx_response(card, iob->data);
1066 switch (rc) {
1067 case 0:
1068 break;
1069 case -EIO:
1070 qeth_schedule_recovery(card);
1071 fallthrough;
1072 default:
1073 qeth_clear_ipacmd_list(card);
1074 goto err_idx;
1075 }
1076
1077 cmd = __ipa_reply(iob);
1078 if (cmd) {
1079 cmd = qeth_check_ipa_data(card, cmd);
1080 if (!cmd)
1081 goto out;
1082 if (IS_OSN(card) && card->osn_info.assist_cb &&
1083 cmd->hdr.command != IPA_CMD_STARTLAN) {
1084 card->osn_info.assist_cb(card->dev, cmd);
1085 goto out;
1086 }
1087 }
1088
1089 /* match against pending cmd requests */
1090 spin_lock_irqsave(&card->lock, flags);
1091 list_for_each_entry(tmp, &card->cmd_waiter_list, list) {
1092 if (tmp->match && tmp->match(tmp, iob)) {
1093 request = tmp;
1094 /* take the object outside the lock */
1095 qeth_get_cmd(request);
1096 break;
1097 }
1098 }
1099 spin_unlock_irqrestore(&card->lock, flags);
1100
1101 if (!request)
1102 goto out;
1103
1104 reply = &request->reply;
1105 if (!reply->callback) {
1106 rc = 0;
1107 goto no_callback;
1108 }
1109
1110 spin_lock_irqsave(&request->lock, flags);
1111 if (request->rc)
1112 /* Bail out when the requestor has already left: */
1113 rc = request->rc;
1114 else
1115 rc = reply->callback(card, reply, cmd ? (unsigned long)cmd :
1116 (unsigned long)iob);
1117 spin_unlock_irqrestore(&request->lock, flags);
1118
1119 no_callback:
1120 if (rc <= 0)
1121 qeth_notify_cmd(request, rc);
1122 qeth_put_cmd(request);
1123 out:
1124 memcpy(&card->seqno.pdu_hdr_ack,
1125 QETH_PDU_HEADER_SEQ_NO(iob->data),
1126 QETH_SEQ_NO_LENGTH);
1127 __qeth_issue_next_read(card);
1128 err_idx:
1129 qeth_put_cmd(iob);
1130 }
1131
1132 static int qeth_set_thread_start_bit(struct qeth_card *card,
1133 unsigned long thread)
1134 {
1135 unsigned long flags;
1136 int rc = 0;
1137
1138 spin_lock_irqsave(&card->thread_mask_lock, flags);
1139 if (!(card->thread_allowed_mask & thread))
1140 rc = -EPERM;
1141 else if (card->thread_start_mask & thread)
1142 rc = -EBUSY;
1143 else
1144 card->thread_start_mask |= thread;
1145 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1146
1147 return rc;
1148 }
1149
1150 static void qeth_clear_thread_start_bit(struct qeth_card *card,
1151 unsigned long thread)
1152 {
1153 unsigned long flags;
1154
1155 spin_lock_irqsave(&card->thread_mask_lock, flags);
1156 card->thread_start_mask &= ~thread;
1157 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1158 wake_up(&card->wait_q);
1159 }
1160
1161 static void qeth_clear_thread_running_bit(struct qeth_card *card,
1162 unsigned long thread)
1163 {
1164 unsigned long flags;
1165
1166 spin_lock_irqsave(&card->thread_mask_lock, flags);
1167 card->thread_running_mask &= ~thread;
1168 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1169 wake_up_all(&card->wait_q);
1170 }
1171
1172 static int __qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
1173 {
1174 unsigned long flags;
1175 int rc = 0;
1176
1177 spin_lock_irqsave(&card->thread_mask_lock, flags);
1178 if (card->thread_start_mask & thread) {
1179 if ((card->thread_allowed_mask & thread) &&
1180 !(card->thread_running_mask & thread)) {
1181 rc = 1;
1182 card->thread_start_mask &= ~thread;
1183 card->thread_running_mask |= thread;
1184 } else
1185 rc = -EPERM;
1186 }
1187 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1188 return rc;
1189 }
1190
1191 static int qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
1192 {
1193 int rc = 0;
1194
1195 wait_event(card->wait_q,
1196 (rc = __qeth_do_run_thread(card, thread)) >= 0);
1197 return rc;
1198 }
1199
1200 int qeth_schedule_recovery(struct qeth_card *card)
1201 {
1202 int rc;
1203
1204 QETH_CARD_TEXT(card, 2, "startrec");
1205
1206 rc = qeth_set_thread_start_bit(card, QETH_RECOVER_THREAD);
1207 if (!rc)
1208 schedule_work(&card->kernel_thread_starter);
1209
1210 return rc;
1211 }
1212
1213 static int qeth_get_problem(struct qeth_card *card, struct ccw_device *cdev,
1214 struct irb *irb)
1215 {
1216 int dstat, cstat;
1217 char *sense;
1218
1219 sense = (char *) irb->ecw;
1220 cstat = irb->scsw.cmd.cstat;
1221 dstat = irb->scsw.cmd.dstat;
1222
1223 if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK |
1224 SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK |
1225 SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) {
1226 QETH_CARD_TEXT(card, 2, "CGENCHK");
1227 dev_warn(&cdev->dev, "The qeth device driver "
1228 "failed to recover an error on the device\n");
1229 QETH_DBF_MESSAGE(2, "check on channel %x with dstat=%#x, cstat=%#x\n",
1230 CCW_DEVID(cdev), dstat, cstat);
1231 print_hex_dump(KERN_WARNING, "qeth: irb ", DUMP_PREFIX_OFFSET,
1232 16, 1, irb, 64, 1);
1233 return -EIO;
1234 }
1235
1236 if (dstat & DEV_STAT_UNIT_CHECK) {
1237 if (sense[SENSE_RESETTING_EVENT_BYTE] &
1238 SENSE_RESETTING_EVENT_FLAG) {
1239 QETH_CARD_TEXT(card, 2, "REVIND");
1240 return -EIO;
1241 }
1242 if (sense[SENSE_COMMAND_REJECT_BYTE] &
1243 SENSE_COMMAND_REJECT_FLAG) {
1244 QETH_CARD_TEXT(card, 2, "CMDREJi");
1245 return -EIO;
1246 }
1247 if ((sense[2] == 0xaf) && (sense[3] == 0xfe)) {
1248 QETH_CARD_TEXT(card, 2, "AFFE");
1249 return -EIO;
1250 }
1251 if ((!sense[0]) && (!sense[1]) && (!sense[2]) && (!sense[3])) {
1252 QETH_CARD_TEXT(card, 2, "ZEROSEN");
1253 return 0;
1254 }
1255 QETH_CARD_TEXT(card, 2, "DGENCHK");
1256 return -EIO;
1257 }
1258 return 0;
1259 }
1260
1261 static int qeth_check_irb_error(struct qeth_card *card, struct ccw_device *cdev,
1262 struct irb *irb)
1263 {
1264 if (!IS_ERR(irb))
1265 return 0;
1266
1267 switch (PTR_ERR(irb)) {
1268 case -EIO:
1269 QETH_DBF_MESSAGE(2, "i/o-error on channel %x\n",
1270 CCW_DEVID(cdev));
1271 QETH_CARD_TEXT(card, 2, "ckirberr");
1272 QETH_CARD_TEXT_(card, 2, " rc%d", -EIO);
1273 return -EIO;
1274 case -ETIMEDOUT:
1275 dev_warn(&cdev->dev, "A hardware operation timed out"
1276 " on the device\n");
1277 QETH_CARD_TEXT(card, 2, "ckirberr");
1278 QETH_CARD_TEXT_(card, 2, " rc%d", -ETIMEDOUT);
1279 return -ETIMEDOUT;
1280 default:
1281 QETH_DBF_MESSAGE(2, "unknown error %ld on channel %x\n",
1282 PTR_ERR(irb), CCW_DEVID(cdev));
1283 QETH_CARD_TEXT(card, 2, "ckirberr");
1284 QETH_CARD_TEXT(card, 2, " rc???");
1285 return PTR_ERR(irb);
1286 }
1287 }
1288
1289 static void qeth_irq(struct ccw_device *cdev, unsigned long intparm,
1290 struct irb *irb)
1291 {
1292 int rc;
1293 int cstat, dstat;
1294 struct qeth_cmd_buffer *iob = NULL;
1295 struct ccwgroup_device *gdev;
1296 struct qeth_channel *channel;
1297 struct qeth_card *card;
1298
1299 /* while we hold the ccwdev lock, this stays valid: */
1300 gdev = dev_get_drvdata(&cdev->dev);
1301 card = dev_get_drvdata(&gdev->dev);
1302
1303 QETH_CARD_TEXT(card, 5, "irq");
1304
1305 if (card->read.ccwdev == cdev) {
1306 channel = &card->read;
1307 QETH_CARD_TEXT(card, 5, "read");
1308 } else if (card->write.ccwdev == cdev) {
1309 channel = &card->write;
1310 QETH_CARD_TEXT(card, 5, "write");
1311 } else {
1312 channel = &card->data;
1313 QETH_CARD_TEXT(card, 5, "data");
1314 }
1315
1316 if (intparm == 0) {
1317 QETH_CARD_TEXT(card, 5, "irqunsol");
1318 } else if ((addr_t)intparm != (addr_t)channel->active_cmd) {
1319 QETH_CARD_TEXT(card, 5, "irqunexp");
1320
1321 dev_err(&cdev->dev,
1322 "Received IRQ with intparm %lx, expected %px\n",
1323 intparm, channel->active_cmd);
1324 if (channel->active_cmd)
1325 qeth_cancel_cmd(channel->active_cmd, -EIO);
1326 } else {
1327 iob = (struct qeth_cmd_buffer *) (addr_t)intparm;
1328 }
1329
1330 channel->active_cmd = NULL;
1331 qeth_unlock_channel(card, channel);
1332
1333 rc = qeth_check_irb_error(card, cdev, irb);
1334 if (rc) {
1335 /* IO was terminated, free its resources. */
1336 if (iob)
1337 qeth_cancel_cmd(iob, rc);
1338 return;
1339 }
1340
1341 if (irb->scsw.cmd.fctl & SCSW_FCTL_CLEAR_FUNC) {
1342 channel->state = CH_STATE_STOPPED;
1343 wake_up(&card->wait_q);
1344 }
1345
1346 if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) {
1347 channel->state = CH_STATE_HALTED;
1348 wake_up(&card->wait_q);
1349 }
1350
1351 if (iob && (irb->scsw.cmd.fctl & (SCSW_FCTL_CLEAR_FUNC |
1352 SCSW_FCTL_HALT_FUNC))) {
1353 qeth_cancel_cmd(iob, -ECANCELED);
1354 iob = NULL;
1355 }
1356
1357 cstat = irb->scsw.cmd.cstat;
1358 dstat = irb->scsw.cmd.dstat;
1359
1360 if ((dstat & DEV_STAT_UNIT_EXCEP) ||
1361 (dstat & DEV_STAT_UNIT_CHECK) ||
1362 (cstat)) {
1363 if (irb->esw.esw0.erw.cons) {
1364 dev_warn(&channel->ccwdev->dev,
1365 "The qeth device driver failed to recover "
1366 "an error on the device\n");
1367 QETH_DBF_MESSAGE(2, "sense data available on channel %x: cstat %#X dstat %#X\n",
1368 CCW_DEVID(channel->ccwdev), cstat,
1369 dstat);
1370 print_hex_dump(KERN_WARNING, "qeth: irb ",
1371 DUMP_PREFIX_OFFSET, 16, 1, irb, 32, 1);
1372 print_hex_dump(KERN_WARNING, "qeth: sense data ",
1373 DUMP_PREFIX_OFFSET, 16, 1, irb->ecw, 32, 1);
1374 }
1375
1376 rc = qeth_get_problem(card, cdev, irb);
1377 if (rc) {
1378 card->read_or_write_problem = 1;
1379 if (iob)
1380 qeth_cancel_cmd(iob, rc);
1381 qeth_clear_ipacmd_list(card);
1382 qeth_schedule_recovery(card);
1383 return;
1384 }
1385 }
1386
1387 if (iob) {
1388 /* sanity check: */
1389 if (irb->scsw.cmd.count > iob->length) {
1390 qeth_cancel_cmd(iob, -EIO);
1391 return;
1392 }
1393 if (iob->callback)
1394 iob->callback(card, iob,
1395 iob->length - irb->scsw.cmd.count);
1396 }
1397 }
1398
1399 static void qeth_notify_skbs(struct qeth_qdio_out_q *q,
1400 struct qeth_qdio_out_buffer *buf,
1401 enum iucv_tx_notify notification)
1402 {
1403 struct sk_buff *skb;
1404
1405 skb_queue_walk(&buf->skb_list, skb) {
1406 QETH_CARD_TEXT_(q->card, 5, "skbn%d", notification);
1407 QETH_CARD_TEXT_(q->card, 5, "%lx", (long) skb);
1408 if (skb->protocol == htons(ETH_P_AF_IUCV) && skb->sk)
1409 iucv_sk(skb->sk)->sk_txnotify(skb, notification);
1410 }
1411 }
1412
1413 static void qeth_tx_complete_buf(struct qeth_qdio_out_buffer *buf, bool error,
1414 int budget)
1415 {
1416 struct qeth_qdio_out_q *queue = buf->q;
1417 struct sk_buff *skb;
1418
1419 /* release may never happen from within CQ tasklet scope */
1420 WARN_ON_ONCE(atomic_read(&buf->state) == QETH_QDIO_BUF_IN_CQ);
1421
1422 if (atomic_read(&buf->state) == QETH_QDIO_BUF_PENDING)
1423 qeth_notify_skbs(queue, buf, TX_NOTIFY_GENERALERROR);
1424
1425 /* Empty buffer? */
1426 if (buf->next_element_to_fill == 0)
1427 return;
1428
1429 QETH_TXQ_STAT_INC(queue, bufs);
1430 QETH_TXQ_STAT_ADD(queue, buf_elements, buf->next_element_to_fill);
1431 if (error) {
1432 QETH_TXQ_STAT_ADD(queue, tx_errors, buf->frames);
1433 } else {
1434 QETH_TXQ_STAT_ADD(queue, tx_packets, buf->frames);
1435 QETH_TXQ_STAT_ADD(queue, tx_bytes, buf->bytes);
1436 }
1437
1438 while ((skb = __skb_dequeue(&buf->skb_list)) != NULL) {
1439 unsigned int bytes = qdisc_pkt_len(skb);
1440 bool is_tso = skb_is_gso(skb);
1441 unsigned int packets;
1442
1443 packets = is_tso ? skb_shinfo(skb)->gso_segs : 1;
1444 if (!error) {
1445 if (skb->ip_summed == CHECKSUM_PARTIAL)
1446 QETH_TXQ_STAT_ADD(queue, skbs_csum, packets);
1447 if (skb_is_nonlinear(skb))
1448 QETH_TXQ_STAT_INC(queue, skbs_sg);
1449 if (is_tso) {
1450 QETH_TXQ_STAT_INC(queue, skbs_tso);
1451 QETH_TXQ_STAT_ADD(queue, tso_bytes, bytes);
1452 }
1453 }
1454
1455 napi_consume_skb(skb, budget);
1456 }
1457 }
1458
1459 static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
1460 struct qeth_qdio_out_buffer *buf,
1461 bool error, int budget)
1462 {
1463 int i;
1464
1465 /* is PCI flag set on buffer? */
1466 if (buf->buffer->element[0].sflags & SBAL_SFLAGS0_PCI_REQ)
1467 atomic_dec(&queue->set_pci_flags_count);
1468
1469 qeth_tx_complete_buf(buf, error, budget);
1470
1471 for (i = 0; i < queue->max_elements; ++i) {
1472 void *data = phys_to_virt(buf->buffer->element[i].addr);
1473
1474 if (data && buf->is_header[i])
1475 kmem_cache_free(qeth_core_header_cache, data);
1476 buf->is_header[i] = 0;
1477 }
1478
1479 qeth_scrub_qdio_buffer(buf->buffer, queue->max_elements);
1480 buf->next_element_to_fill = 0;
1481 buf->frames = 0;
1482 buf->bytes = 0;
1483 atomic_set(&buf->state, QETH_QDIO_BUF_EMPTY);
1484 }
1485
1486 static void qeth_drain_output_queue(struct qeth_qdio_out_q *q, bool free)
1487 {
1488 int j;
1489
1490 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
1491 if (!q->bufs[j])
1492 continue;
1493 qeth_cleanup_handled_pending(q, j, 1);
1494 qeth_clear_output_buffer(q, q->bufs[j], true, 0);
1495 if (free) {
1496 kmem_cache_free(qeth_qdio_outbuf_cache, q->bufs[j]);
1497 q->bufs[j] = NULL;
1498 }
1499 }
1500 }
1501
1502 static void qeth_drain_output_queues(struct qeth_card *card)
1503 {
1504 int i;
1505
1506 QETH_CARD_TEXT(card, 2, "clearqdbf");
1507 /* clear outbound buffers to free skbs */
1508 for (i = 0; i < card->qdio.no_out_queues; ++i) {
1509 if (card->qdio.out_qs[i])
1510 qeth_drain_output_queue(card->qdio.out_qs[i], false);
1511 }
1512 }
1513
1514 static void qeth_osa_set_output_queues(struct qeth_card *card, bool single)
1515 {
1516 unsigned int max = single ? 1 : card->dev->num_tx_queues;
1517
1518 if (card->qdio.no_out_queues == max)
1519 return;
1520
1521 if (atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED)
1522 qeth_free_qdio_queues(card);
1523
1524 if (max == 1 && card->qdio.do_prio_queueing != QETH_PRIOQ_DEFAULT)
1525 dev_info(&card->gdev->dev, "Priority Queueing not supported\n");
1526
1527 card->qdio.no_out_queues = max;
1528 }
1529
1530 static int qeth_update_from_chp_desc(struct qeth_card *card)
1531 {
1532 struct ccw_device *ccwdev;
1533 struct channel_path_desc_fmt0 *chp_dsc;
1534
1535 QETH_CARD_TEXT(card, 2, "chp_desc");
1536
1537 ccwdev = card->data.ccwdev;
1538 chp_dsc = ccw_device_get_chp_desc(ccwdev, 0);
1539 if (!chp_dsc)
1540 return -ENOMEM;
1541
1542 card->info.func_level = 0x4100 + chp_dsc->desc;
1543
1544 if (IS_OSD(card) || IS_OSX(card))
1545 /* CHPP field bit 6 == 1 -> single queue */
1546 qeth_osa_set_output_queues(card, chp_dsc->chpp & 0x02);
1547
1548 kfree(chp_dsc);
1549 QETH_CARD_TEXT_(card, 2, "nr:%x", card->qdio.no_out_queues);
1550 QETH_CARD_TEXT_(card, 2, "lvl:%02x", card->info.func_level);
1551 return 0;
1552 }
1553
1554 static void qeth_init_qdio_info(struct qeth_card *card)
1555 {
1556 QETH_CARD_TEXT(card, 4, "intqdinf");
1557 atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
1558 card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT;
1559 card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
1560
1561 /* inbound */
1562 card->qdio.no_in_queues = 1;
1563 card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
1564 if (IS_IQD(card))
1565 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_HSDEFAULT;
1566 else
1567 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_DEFAULT;
1568 card->qdio.in_buf_pool.buf_count = card->qdio.init_pool.buf_count;
1569 INIT_LIST_HEAD(&card->qdio.in_buf_pool.entry_list);
1570 INIT_LIST_HEAD(&card->qdio.init_pool.entry_list);
1571 }
1572
1573 static void qeth_set_initial_options(struct qeth_card *card)
1574 {
1575 card->options.route4.type = NO_ROUTER;
1576 card->options.route6.type = NO_ROUTER;
1577 card->options.isolation = ISOLATION_MODE_NONE;
1578 card->options.cq = QETH_CQ_DISABLED;
1579 card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
1580 }
1581
1582 static int qeth_do_start_thread(struct qeth_card *card, unsigned long thread)
1583 {
1584 unsigned long flags;
1585 int rc = 0;
1586
1587 spin_lock_irqsave(&card->thread_mask_lock, flags);
1588 QETH_CARD_TEXT_(card, 4, " %02x%02x%02x",
1589 (u8) card->thread_start_mask,
1590 (u8) card->thread_allowed_mask,
1591 (u8) card->thread_running_mask);
1592 rc = (card->thread_start_mask & thread);
1593 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1594 return rc;
1595 }
1596
1597 static int qeth_do_reset(void *data);
1598 static void qeth_start_kernel_thread(struct work_struct *work)
1599 {
1600 struct task_struct *ts;
1601 struct qeth_card *card = container_of(work, struct qeth_card,
1602 kernel_thread_starter);
1603 QETH_CARD_TEXT(card, 2, "strthrd");
1604
1605 if (card->read.state != CH_STATE_UP &&
1606 card->write.state != CH_STATE_UP)
1607 return;
1608 if (qeth_do_start_thread(card, QETH_RECOVER_THREAD)) {
1609 ts = kthread_run(qeth_do_reset, card, "qeth_recover");
1610 if (IS_ERR(ts)) {
1611 qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1612 qeth_clear_thread_running_bit(card,
1613 QETH_RECOVER_THREAD);
1614 }
1615 }
1616 }
1617
1618 static void qeth_buffer_reclaim_work(struct work_struct *);
1619 static void qeth_setup_card(struct qeth_card *card)
1620 {
1621 QETH_CARD_TEXT(card, 2, "setupcrd");
1622
1623 card->info.type = CARD_RDEV(card)->id.driver_info;
1624 card->state = CARD_STATE_DOWN;
1625 spin_lock_init(&card->lock);
1626 spin_lock_init(&card->thread_mask_lock);
1627 mutex_init(&card->conf_mutex);
1628 mutex_init(&card->discipline_mutex);
1629 INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread);
1630 INIT_LIST_HEAD(&card->cmd_waiter_list);
1631 init_waitqueue_head(&card->wait_q);
1632 qeth_set_initial_options(card);
1633 /* IP address takeover */
1634 INIT_LIST_HEAD(&card->ipato.entries);
1635 qeth_init_qdio_info(card);
1636 INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work);
1637 INIT_WORK(&card->close_dev_work, qeth_close_dev_handler);
1638 hash_init(card->rx_mode_addrs);
1639 hash_init(card->local_addrs4);
1640 hash_init(card->local_addrs6);
1641 spin_lock_init(&card->local_addrs4_lock);
1642 spin_lock_init(&card->local_addrs6_lock);
1643 }
1644
1645 static void qeth_core_sl_print(struct seq_file *m, struct service_level *slr)
1646 {
1647 struct qeth_card *card = container_of(slr, struct qeth_card,
1648 qeth_service_level);
1649 if (card->info.mcl_level[0])
1650 seq_printf(m, "qeth: %s firmware level %s\n",
1651 CARD_BUS_ID(card), card->info.mcl_level);
1652 }
1653
1654 static struct qeth_card *qeth_alloc_card(struct ccwgroup_device *gdev)
1655 {
1656 struct qeth_card *card;
1657
1658 QETH_DBF_TEXT(SETUP, 2, "alloccrd");
1659 card = kzalloc(sizeof(*card), GFP_KERNEL);
1660 if (!card)
1661 goto out;
1662 QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1663
1664 card->gdev = gdev;
1665 dev_set_drvdata(&gdev->dev, card);
1666 CARD_RDEV(card) = gdev->cdev[0];
1667 CARD_WDEV(card) = gdev->cdev[1];
1668 CARD_DDEV(card) = gdev->cdev[2];
1669
1670 card->event_wq = alloc_ordered_workqueue("%s_event", 0,
1671 dev_name(&gdev->dev));
1672 if (!card->event_wq)
1673 goto out_wq;
1674
1675 card->read_cmd = qeth_alloc_cmd(&card->read, QETH_BUFSIZE, 1, 0);
1676 if (!card->read_cmd)
1677 goto out_read_cmd;
1678
1679 card->debugfs = debugfs_create_dir(dev_name(&gdev->dev),
1680 qeth_debugfs_root);
1681 debugfs_create_file("local_addrs", 0400, card->debugfs, card,
1682 &qeth_debugfs_local_addr_fops);
1683
1684 card->qeth_service_level.seq_print = qeth_core_sl_print;
1685 register_service_level(&card->qeth_service_level);
1686 return card;
1687
1688 out_read_cmd:
1689 destroy_workqueue(card->event_wq);
1690 out_wq:
1691 dev_set_drvdata(&gdev->dev, NULL);
1692 kfree(card);
1693 out:
1694 return NULL;
1695 }
1696
1697 static int qeth_clear_channel(struct qeth_card *card,
1698 struct qeth_channel *channel)
1699 {
1700 int rc;
1701
1702 QETH_CARD_TEXT(card, 3, "clearch");
1703 spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1704 rc = ccw_device_clear(channel->ccwdev, (addr_t)channel->active_cmd);
1705 spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1706
1707 if (rc)
1708 return rc;
1709 rc = wait_event_interruptible_timeout(card->wait_q,
1710 channel->state == CH_STATE_STOPPED, QETH_TIMEOUT);
1711 if (rc == -ERESTARTSYS)
1712 return rc;
1713 if (channel->state != CH_STATE_STOPPED)
1714 return -ETIME;
1715 channel->state = CH_STATE_DOWN;
1716 return 0;
1717 }
1718
1719 static int qeth_halt_channel(struct qeth_card *card,
1720 struct qeth_channel *channel)
1721 {
1722 int rc;
1723
1724 QETH_CARD_TEXT(card, 3, "haltch");
1725 spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1726 rc = ccw_device_halt(channel->ccwdev, (addr_t)channel->active_cmd);
1727 spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1728
1729 if (rc)
1730 return rc;
1731 rc = wait_event_interruptible_timeout(card->wait_q,
1732 channel->state == CH_STATE_HALTED, QETH_TIMEOUT);
1733 if (rc == -ERESTARTSYS)
1734 return rc;
1735 if (channel->state != CH_STATE_HALTED)
1736 return -ETIME;
1737 return 0;
1738 }
1739
1740 static int qeth_stop_channel(struct qeth_channel *channel)
1741 {
1742 struct ccw_device *cdev = channel->ccwdev;
1743 int rc;
1744
1745 rc = ccw_device_set_offline(cdev);
1746
1747 spin_lock_irq(get_ccwdev_lock(cdev));
1748 if (channel->active_cmd) {
1749 dev_err(&cdev->dev, "Stopped channel while cmd %px was still active\n",
1750 channel->active_cmd);
1751 channel->active_cmd = NULL;
1752 }
1753 cdev->handler = NULL;
1754 spin_unlock_irq(get_ccwdev_lock(cdev));
1755
1756 return rc;
1757 }
1758
1759 static int qeth_start_channel(struct qeth_channel *channel)
1760 {
1761 struct ccw_device *cdev = channel->ccwdev;
1762 int rc;
1763
1764 channel->state = CH_STATE_DOWN;
1765 atomic_set(&channel->irq_pending, 0);
1766
1767 spin_lock_irq(get_ccwdev_lock(cdev));
1768 cdev->handler = qeth_irq;
1769 spin_unlock_irq(get_ccwdev_lock(cdev));
1770
1771 rc = ccw_device_set_online(cdev);
1772 if (rc)
1773 goto err;
1774
1775 return 0;
1776
1777 err:
1778 spin_lock_irq(get_ccwdev_lock(cdev));
1779 cdev->handler = NULL;
1780 spin_unlock_irq(get_ccwdev_lock(cdev));
1781 return rc;
1782 }
1783
1784 static int qeth_halt_channels(struct qeth_card *card)
1785 {
1786 int rc1 = 0, rc2 = 0, rc3 = 0;
1787
1788 QETH_CARD_TEXT(card, 3, "haltchs");
1789 rc1 = qeth_halt_channel(card, &card->read);
1790 rc2 = qeth_halt_channel(card, &card->write);
1791 rc3 = qeth_halt_channel(card, &card->data);
1792 if (rc1)
1793 return rc1;
1794 if (rc2)
1795 return rc2;
1796 return rc3;
1797 }
1798
1799 static int qeth_clear_channels(struct qeth_card *card)
1800 {
1801 int rc1 = 0, rc2 = 0, rc3 = 0;
1802
1803 QETH_CARD_TEXT(card, 3, "clearchs");
1804 rc1 = qeth_clear_channel(card, &card->read);
1805 rc2 = qeth_clear_channel(card, &card->write);
1806 rc3 = qeth_clear_channel(card, &card->data);
1807 if (rc1)
1808 return rc1;
1809 if (rc2)
1810 return rc2;
1811 return rc3;
1812 }
1813
1814 static int qeth_clear_halt_card(struct qeth_card *card, int halt)
1815 {
1816 int rc = 0;
1817
1818 QETH_CARD_TEXT(card, 3, "clhacrd");
1819
1820 if (halt)
1821 rc = qeth_halt_channels(card);
1822 if (rc)
1823 return rc;
1824 return qeth_clear_channels(card);
1825 }
1826
1827 static int qeth_qdio_clear_card(struct qeth_card *card, int use_halt)
1828 {
1829 int rc = 0;
1830
1831 QETH_CARD_TEXT(card, 3, "qdioclr");
1832 switch (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ESTABLISHED,
1833 QETH_QDIO_CLEANING)) {
1834 case QETH_QDIO_ESTABLISHED:
1835 if (IS_IQD(card))
1836 rc = qdio_shutdown(CARD_DDEV(card),
1837 QDIO_FLAG_CLEANUP_USING_HALT);
1838 else
1839 rc = qdio_shutdown(CARD_DDEV(card),
1840 QDIO_FLAG_CLEANUP_USING_CLEAR);
1841 if (rc)
1842 QETH_CARD_TEXT_(card, 3, "1err%d", rc);
1843 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
1844 break;
1845 case QETH_QDIO_CLEANING:
1846 return rc;
1847 default:
1848 break;
1849 }
1850 rc = qeth_clear_halt_card(card, use_halt);
1851 if (rc)
1852 QETH_CARD_TEXT_(card, 3, "2err%d", rc);
1853 return rc;
1854 }
1855
1856 static enum qeth_discipline_id qeth_vm_detect_layer(struct qeth_card *card)
1857 {
1858 enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1859 struct diag26c_vnic_resp *response = NULL;
1860 struct diag26c_vnic_req *request = NULL;
1861 struct ccw_dev_id id;
1862 char userid[80];
1863 int rc = 0;
1864
1865 QETH_CARD_TEXT(card, 2, "vmlayer");
1866
1867 cpcmd("QUERY USERID", userid, sizeof(userid), &rc);
1868 if (rc)
1869 goto out;
1870
1871 request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
1872 response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
1873 if (!request || !response) {
1874 rc = -ENOMEM;
1875 goto out;
1876 }
1877
1878 ccw_device_get_id(CARD_RDEV(card), &id);
1879 request->resp_buf_len = sizeof(*response);
1880 request->resp_version = DIAG26C_VERSION6_VM65918;
1881 request->req_format = DIAG26C_VNIC_INFO;
1882 ASCEBC(userid, 8);
1883 memcpy(&request->sys_name, userid, 8);
1884 request->devno = id.devno;
1885
1886 QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1887 rc = diag26c(request, response, DIAG26C_PORT_VNIC);
1888 QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1889 if (rc)
1890 goto out;
1891 QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
1892
1893 if (request->resp_buf_len < sizeof(*response) ||
1894 response->version != request->resp_version) {
1895 rc = -EIO;
1896 goto out;
1897 }
1898
1899 if (response->protocol == VNIC_INFO_PROT_L2)
1900 disc = QETH_DISCIPLINE_LAYER2;
1901 else if (response->protocol == VNIC_INFO_PROT_L3)
1902 disc = QETH_DISCIPLINE_LAYER3;
1903
1904 out:
1905 kfree(response);
1906 kfree(request);
1907 if (rc)
1908 QETH_CARD_TEXT_(card, 2, "err%x", rc);
1909 return disc;
1910 }
1911
1912 /* Determine whether the device requires a specific layer discipline */
1913 static enum qeth_discipline_id qeth_enforce_discipline(struct qeth_card *card)
1914 {
1915 enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1916
1917 if (IS_OSM(card) || IS_OSN(card))
1918 disc = QETH_DISCIPLINE_LAYER2;
1919 else if (IS_VM_NIC(card))
1920 disc = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
1921 qeth_vm_detect_layer(card);
1922
1923 switch (disc) {
1924 case QETH_DISCIPLINE_LAYER2:
1925 QETH_CARD_TEXT(card, 3, "force l2");
1926 break;
1927 case QETH_DISCIPLINE_LAYER3:
1928 QETH_CARD_TEXT(card, 3, "force l3");
1929 break;
1930 default:
1931 QETH_CARD_TEXT(card, 3, "force no");
1932 }
1933
1934 return disc;
1935 }
1936
1937 static void qeth_set_blkt_defaults(struct qeth_card *card)
1938 {
1939 QETH_CARD_TEXT(card, 2, "cfgblkt");
1940
1941 if (card->info.use_v1_blkt) {
1942 card->info.blkt.time_total = 0;
1943 card->info.blkt.inter_packet = 0;
1944 card->info.blkt.inter_packet_jumbo = 0;
1945 } else {
1946 card->info.blkt.time_total = 250;
1947 card->info.blkt.inter_packet = 5;
1948 card->info.blkt.inter_packet_jumbo = 15;
1949 }
1950 }
1951
1952 static void qeth_idx_init(struct qeth_card *card)
1953 {
1954 memset(&card->seqno, 0, sizeof(card->seqno));
1955
1956 card->token.issuer_rm_w = 0x00010103UL;
1957 card->token.cm_filter_w = 0x00010108UL;
1958 card->token.cm_connection_w = 0x0001010aUL;
1959 card->token.ulp_filter_w = 0x0001010bUL;
1960 card->token.ulp_connection_w = 0x0001010dUL;
1961
1962 switch (card->info.type) {
1963 case QETH_CARD_TYPE_IQD:
1964 card->info.func_level = QETH_IDX_FUNC_LEVEL_IQD;
1965 break;
1966 case QETH_CARD_TYPE_OSD:
1967 case QETH_CARD_TYPE_OSN:
1968 card->info.func_level = QETH_IDX_FUNC_LEVEL_OSD;
1969 break;
1970 default:
1971 break;
1972 }
1973 }
1974
1975 static void qeth_idx_finalize_cmd(struct qeth_card *card,
1976 struct qeth_cmd_buffer *iob)
1977 {
1978 memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data), &card->seqno.trans_hdr,
1979 QETH_SEQ_NO_LENGTH);
1980 if (iob->channel == &card->write)
1981 card->seqno.trans_hdr++;
1982 }
1983
1984 static int qeth_peer_func_level(int level)
1985 {
1986 if ((level & 0xff) == 8)
1987 return (level & 0xff) + 0x400;
1988 if (((level >> 8) & 3) == 1)
1989 return (level & 0xff) + 0x200;
1990 return level;
1991 }
1992
1993 static void qeth_mpc_finalize_cmd(struct qeth_card *card,
1994 struct qeth_cmd_buffer *iob)
1995 {
1996 qeth_idx_finalize_cmd(card, iob);
1997
1998 memcpy(QETH_PDU_HEADER_SEQ_NO(iob->data),
1999 &card->seqno.pdu_hdr, QETH_SEQ_NO_LENGTH);
2000 card->seqno.pdu_hdr++;
2001 memcpy(QETH_PDU_HEADER_ACK_SEQ_NO(iob->data),
2002 &card->seqno.pdu_hdr_ack, QETH_SEQ_NO_LENGTH);
2003
2004 iob->callback = qeth_release_buffer_cb;
2005 }
2006
2007 static bool qeth_mpc_match_reply(struct qeth_cmd_buffer *iob,
2008 struct qeth_cmd_buffer *reply)
2009 {
2010 /* MPC cmds are issued strictly in sequence. */
2011 return !IS_IPA(reply->data);
2012 }
2013
2014 static struct qeth_cmd_buffer *qeth_mpc_alloc_cmd(struct qeth_card *card,
2015 const void *data,
2016 unsigned int data_length)
2017 {
2018 struct qeth_cmd_buffer *iob;
2019
2020 iob = qeth_alloc_cmd(&card->write, data_length, 1, QETH_TIMEOUT);
2021 if (!iob)
2022 return NULL;
2023
2024 memcpy(iob->data, data, data_length);
2025 qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, data_length,
2026 iob->data);
2027 iob->finalize = qeth_mpc_finalize_cmd;
2028 iob->match = qeth_mpc_match_reply;
2029 return iob;
2030 }
2031
2032 /**
2033 * qeth_send_control_data() - send control command to the card
2034 * @card: qeth_card structure pointer
2035 * @iob: qeth_cmd_buffer pointer
2036 * @reply_cb: callback function pointer
2037 * @cb_card: pointer to the qeth_card structure
2038 * @cb_reply: pointer to the qeth_reply structure
2039 * @cb_cmd: pointer to the original iob for non-IPA
2040 * commands, or to the qeth_ipa_cmd structure
2041 * for the IPA commands.
2042 * @reply_param: private pointer passed to the callback
2043 *
2044 * Callback function gets called one or more times, with cb_cmd
2045 * pointing to the response returned by the hardware. Callback
2046 * function must return
2047 * > 0 if more reply blocks are expected,
2048 * 0 if the last or only reply block is received, and
2049 * < 0 on error.
2050 * Callback function can get the value of the reply_param pointer from the
2051 * field 'param' of the structure qeth_reply.
2052 */
2053
2054 static int qeth_send_control_data(struct qeth_card *card,
2055 struct qeth_cmd_buffer *iob,
2056 int (*reply_cb)(struct qeth_card *cb_card,
2057 struct qeth_reply *cb_reply,
2058 unsigned long cb_cmd),
2059 void *reply_param)
2060 {
2061 struct qeth_channel *channel = iob->channel;
2062 struct qeth_reply *reply = &iob->reply;
2063 long timeout = iob->timeout;
2064 int rc;
2065
2066 QETH_CARD_TEXT(card, 2, "sendctl");
2067
2068 reply->callback = reply_cb;
2069 reply->param = reply_param;
2070
2071 timeout = wait_event_interruptible_timeout(card->wait_q,
2072 qeth_trylock_channel(channel),
2073 timeout);
2074 if (timeout <= 0) {
2075 qeth_put_cmd(iob);
2076 return (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
2077 }
2078
2079 if (iob->finalize)
2080 iob->finalize(card, iob);
2081 QETH_DBF_HEX(CTRL, 2, iob->data, min(iob->length, QETH_DBF_CTRL_LEN));
2082
2083 qeth_enqueue_cmd(card, iob);
2084
2085 /* This pairs with iob->callback, and keeps the iob alive after IO: */
2086 qeth_get_cmd(iob);
2087
2088 QETH_CARD_TEXT(card, 6, "noirqpnd");
2089 spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
2090 rc = ccw_device_start_timeout(channel->ccwdev, __ccw_from_cmd(iob),
2091 (addr_t) iob, 0, 0, timeout);
2092 if (!rc)
2093 channel->active_cmd = iob;
2094 spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
2095 if (rc) {
2096 QETH_DBF_MESSAGE(2, "qeth_send_control_data on device %x: ccw_device_start rc = %i\n",
2097 CARD_DEVID(card), rc);
2098 QETH_CARD_TEXT_(card, 2, " err%d", rc);
2099 qeth_dequeue_cmd(card, iob);
2100 qeth_put_cmd(iob);
2101 qeth_unlock_channel(card, channel);
2102 goto out;
2103 }
2104
2105 timeout = wait_for_completion_interruptible_timeout(&iob->done,
2106 timeout);
2107 if (timeout <= 0)
2108 rc = (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
2109
2110 qeth_dequeue_cmd(card, iob);
2111
2112 if (reply_cb) {
2113 /* Wait until the callback for a late reply has completed: */
2114 spin_lock_irq(&iob->lock);
2115 if (rc)
2116 /* Zap any callback that's still pending: */
2117 iob->rc = rc;
2118 spin_unlock_irq(&iob->lock);
2119 }
2120
2121 if (!rc)
2122 rc = iob->rc;
2123
2124 out:
2125 qeth_put_cmd(iob);
2126 return rc;
2127 }
2128
2129 struct qeth_node_desc {
2130 struct node_descriptor nd1;
2131 struct node_descriptor nd2;
2132 struct node_descriptor nd3;
2133 };
2134
2135 static void qeth_read_conf_data_cb(struct qeth_card *card,
2136 struct qeth_cmd_buffer *iob,
2137 unsigned int data_length)
2138 {
2139 struct qeth_node_desc *nd = (struct qeth_node_desc *) iob->data;
2140 int rc = 0;
2141 u8 *tag;
2142
2143 QETH_CARD_TEXT(card, 2, "cfgunit");
2144
2145 if (data_length < sizeof(*nd)) {
2146 rc = -EINVAL;
2147 goto out;
2148 }
2149
2150 card->info.is_vm_nic = nd->nd1.plant[0] == _ascebc['V'] &&
2151 nd->nd1.plant[1] == _ascebc['M'];
2152 tag = (u8 *)&nd->nd1.tag;
2153 card->info.chpid = tag[0];
2154 card->info.unit_addr2 = tag[1];
2155
2156 tag = (u8 *)&nd->nd2.tag;
2157 card->info.cula = tag[1];
2158
2159 card->info.use_v1_blkt = nd->nd3.model[0] == 0xF0 &&
2160 nd->nd3.model[1] == 0xF0 &&
2161 nd->nd3.model[2] >= 0xF1 &&
2162 nd->nd3.model[2] <= 0xF4;
2163
2164 out:
2165 qeth_notify_cmd(iob, rc);
2166 qeth_put_cmd(iob);
2167 }
2168
2169 static int qeth_read_conf_data(struct qeth_card *card)
2170 {
2171 struct qeth_channel *channel = &card->data;
2172 struct qeth_cmd_buffer *iob;
2173 struct ciw *ciw;
2174
2175 /* scan for RCD command in extended SenseID data */
2176 ciw = ccw_device_get_ciw(channel->ccwdev, CIW_TYPE_RCD);
2177 if (!ciw || ciw->cmd == 0)
2178 return -EOPNOTSUPP;
2179 if (ciw->count < sizeof(struct qeth_node_desc))
2180 return -EINVAL;
2181
2182 iob = qeth_alloc_cmd(channel, ciw->count, 1, QETH_RCD_TIMEOUT);
2183 if (!iob)
2184 return -ENOMEM;
2185
2186 iob->callback = qeth_read_conf_data_cb;
2187 qeth_setup_ccw(__ccw_from_cmd(iob), ciw->cmd, 0, iob->length,
2188 iob->data);
2189
2190 return qeth_send_control_data(card, iob, NULL, NULL);
2191 }
2192
2193 static int qeth_idx_check_activate_response(struct qeth_card *card,
2194 struct qeth_channel *channel,
2195 struct qeth_cmd_buffer *iob)
2196 {
2197 int rc;
2198
2199 rc = qeth_check_idx_response(card, iob->data);
2200 if (rc)
2201 return rc;
2202
2203 if (QETH_IS_IDX_ACT_POS_REPLY(iob->data))
2204 return 0;
2205
2206 /* negative reply: */
2207 QETH_CARD_TEXT_(card, 2, "idxneg%c",
2208 QETH_IDX_ACT_CAUSE_CODE(iob->data));
2209
2210 switch (QETH_IDX_ACT_CAUSE_CODE(iob->data)) {
2211 case QETH_IDX_ACT_ERR_EXCL:
2212 dev_err(&channel->ccwdev->dev,
2213 "The adapter is used exclusively by another host\n");
2214 return -EBUSY;
2215 case QETH_IDX_ACT_ERR_AUTH:
2216 case QETH_IDX_ACT_ERR_AUTH_USER:
2217 dev_err(&channel->ccwdev->dev,
2218 "Setting the device online failed because of insufficient authorization\n");
2219 return -EPERM;
2220 default:
2221 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: negative reply\n",
2222 CCW_DEVID(channel->ccwdev));
2223 return -EIO;
2224 }
2225 }
2226
2227 static void qeth_idx_activate_read_channel_cb(struct qeth_card *card,
2228 struct qeth_cmd_buffer *iob,
2229 unsigned int data_length)
2230 {
2231 struct qeth_channel *channel = iob->channel;
2232 u16 peer_level;
2233 int rc;
2234
2235 QETH_CARD_TEXT(card, 2, "idxrdcb");
2236
2237 rc = qeth_idx_check_activate_response(card, channel, iob);
2238 if (rc)
2239 goto out;
2240
2241 memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2242 if (peer_level != qeth_peer_func_level(card->info.func_level)) {
2243 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
2244 CCW_DEVID(channel->ccwdev),
2245 card->info.func_level, peer_level);
2246 rc = -EINVAL;
2247 goto out;
2248 }
2249
2250 memcpy(&card->token.issuer_rm_r,
2251 QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2252 QETH_MPC_TOKEN_LENGTH);
2253 memcpy(&card->info.mcl_level[0],
2254 QETH_IDX_REPLY_LEVEL(iob->data), QETH_MCL_LENGTH);
2255
2256 out:
2257 qeth_notify_cmd(iob, rc);
2258 qeth_put_cmd(iob);
2259 }
2260
2261 static void qeth_idx_activate_write_channel_cb(struct qeth_card *card,
2262 struct qeth_cmd_buffer *iob,
2263 unsigned int data_length)
2264 {
2265 struct qeth_channel *channel = iob->channel;
2266 u16 peer_level;
2267 int rc;
2268
2269 QETH_CARD_TEXT(card, 2, "idxwrcb");
2270
2271 rc = qeth_idx_check_activate_response(card, channel, iob);
2272 if (rc)
2273 goto out;
2274
2275 memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2276 if ((peer_level & ~0x0100) !=
2277 qeth_peer_func_level(card->info.func_level)) {
2278 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
2279 CCW_DEVID(channel->ccwdev),
2280 card->info.func_level, peer_level);
2281 rc = -EINVAL;
2282 }
2283
2284 out:
2285 qeth_notify_cmd(iob, rc);
2286 qeth_put_cmd(iob);
2287 }
2288
2289 static void qeth_idx_setup_activate_cmd(struct qeth_card *card,
2290 struct qeth_cmd_buffer *iob)
2291 {
2292 u16 addr = (card->info.cula << 8) + card->info.unit_addr2;
2293 u8 port = ((u8)card->dev->dev_port) | 0x80;
2294 struct ccw1 *ccw = __ccw_from_cmd(iob);
2295
2296 qeth_setup_ccw(&ccw[0], CCW_CMD_WRITE, CCW_FLAG_CC, IDX_ACTIVATE_SIZE,
2297 iob->data);
2298 qeth_setup_ccw(&ccw[1], CCW_CMD_READ, 0, iob->length, iob->data);
2299 iob->finalize = qeth_idx_finalize_cmd;
2300
2301 port |= QETH_IDX_ACT_INVAL_FRAME;
2302 memcpy(QETH_IDX_ACT_PNO(iob->data), &port, 1);
2303 memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2304 &card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH);
2305 memcpy(QETH_IDX_ACT_FUNC_LEVEL(iob->data),
2306 &card->info.func_level, 2);
2307 memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &card->info.ddev_devno, 2);
2308 memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &addr, 2);
2309 }
2310
2311 static int qeth_idx_activate_read_channel(struct qeth_card *card)
2312 {
2313 struct qeth_channel *channel = &card->read;
2314 struct qeth_cmd_buffer *iob;
2315 int rc;
2316
2317 QETH_CARD_TEXT(card, 2, "idxread");
2318
2319 iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
2320 if (!iob)
2321 return -ENOMEM;
2322
2323 memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE);
2324 qeth_idx_setup_activate_cmd(card, iob);
2325 iob->callback = qeth_idx_activate_read_channel_cb;
2326
2327 rc = qeth_send_control_data(card, iob, NULL, NULL);
2328 if (rc)
2329 return rc;
2330
2331 channel->state = CH_STATE_UP;
2332 return 0;
2333 }
2334
2335 static int qeth_idx_activate_write_channel(struct qeth_card *card)
2336 {
2337 struct qeth_channel *channel = &card->write;
2338 struct qeth_cmd_buffer *iob;
2339 int rc;
2340
2341 QETH_CARD_TEXT(card, 2, "idxwrite");
2342
2343 iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
2344 if (!iob)
2345 return -ENOMEM;
2346
2347 memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE);
2348 qeth_idx_setup_activate_cmd(card, iob);
2349 iob->callback = qeth_idx_activate_write_channel_cb;
2350
2351 rc = qeth_send_control_data(card, iob, NULL, NULL);
2352 if (rc)
2353 return rc;
2354
2355 channel->state = CH_STATE_UP;
2356 return 0;
2357 }
2358
2359 static int qeth_cm_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2360 unsigned long data)
2361 {
2362 struct qeth_cmd_buffer *iob;
2363
2364 QETH_CARD_TEXT(card, 2, "cmenblcb");
2365
2366 iob = (struct qeth_cmd_buffer *) data;
2367 memcpy(&card->token.cm_filter_r,
2368 QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data),
2369 QETH_MPC_TOKEN_LENGTH);
2370 return 0;
2371 }
2372
2373 static int qeth_cm_enable(struct qeth_card *card)
2374 {
2375 struct qeth_cmd_buffer *iob;
2376
2377 QETH_CARD_TEXT(card, 2, "cmenable");
2378
2379 iob = qeth_mpc_alloc_cmd(card, CM_ENABLE, CM_ENABLE_SIZE);
2380 if (!iob)
2381 return -ENOMEM;
2382
2383 memcpy(QETH_CM_ENABLE_ISSUER_RM_TOKEN(iob->data),
2384 &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2385 memcpy(QETH_CM_ENABLE_FILTER_TOKEN(iob->data),
2386 &card->token.cm_filter_w, QETH_MPC_TOKEN_LENGTH);
2387
2388 return qeth_send_control_data(card, iob, qeth_cm_enable_cb, NULL);
2389 }
2390
2391 static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2392 unsigned long data)
2393 {
2394 struct qeth_cmd_buffer *iob;
2395
2396 QETH_CARD_TEXT(card, 2, "cmsetpcb");
2397
2398 iob = (struct qeth_cmd_buffer *) data;
2399 memcpy(&card->token.cm_connection_r,
2400 QETH_CM_SETUP_RESP_DEST_ADDR(iob->data),
2401 QETH_MPC_TOKEN_LENGTH);
2402 return 0;
2403 }
2404
2405 static int qeth_cm_setup(struct qeth_card *card)
2406 {
2407 struct qeth_cmd_buffer *iob;
2408
2409 QETH_CARD_TEXT(card, 2, "cmsetup");
2410
2411 iob = qeth_mpc_alloc_cmd(card, CM_SETUP, CM_SETUP_SIZE);
2412 if (!iob)
2413 return -ENOMEM;
2414
2415 memcpy(QETH_CM_SETUP_DEST_ADDR(iob->data),
2416 &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2417 memcpy(QETH_CM_SETUP_CONNECTION_TOKEN(iob->data),
2418 &card->token.cm_connection_w, QETH_MPC_TOKEN_LENGTH);
2419 memcpy(QETH_CM_SETUP_FILTER_TOKEN(iob->data),
2420 &card->token.cm_filter_r, QETH_MPC_TOKEN_LENGTH);
2421 return qeth_send_control_data(card, iob, qeth_cm_setup_cb, NULL);
2422 }
2423
2424 static bool qeth_is_supported_link_type(struct qeth_card *card, u8 link_type)
2425 {
2426 if (link_type == QETH_LINK_TYPE_LANE_TR ||
2427 link_type == QETH_LINK_TYPE_HSTR) {
2428 dev_err(&card->gdev->dev, "Unsupported Token Ring device\n");
2429 return false;
2430 }
2431
2432 return true;
2433 }
2434
2435 static int qeth_update_max_mtu(struct qeth_card *card, unsigned int max_mtu)
2436 {
2437 struct net_device *dev = card->dev;
2438 unsigned int new_mtu;
2439
2440 if (!max_mtu) {
2441 /* IQD needs accurate max MTU to set up its RX buffers: */
2442 if (IS_IQD(card))
2443 return -EINVAL;
2444 /* tolerate quirky HW: */
2445 max_mtu = ETH_MAX_MTU;
2446 }
2447
2448 rtnl_lock();
2449 if (IS_IQD(card)) {
2450 /* move any device with default MTU to new max MTU: */
2451 new_mtu = (dev->mtu == dev->max_mtu) ? max_mtu : dev->mtu;
2452
2453 /* adjust RX buffer size to new max MTU: */
2454 card->qdio.in_buf_size = max_mtu + 2 * PAGE_SIZE;
2455 if (dev->max_mtu && dev->max_mtu != max_mtu)
2456 qeth_free_qdio_queues(card);
2457 } else {
2458 if (dev->mtu)
2459 new_mtu = dev->mtu;
2460 /* default MTUs for first setup: */
2461 else if (IS_LAYER2(card))
2462 new_mtu = ETH_DATA_LEN;
2463 else
2464 new_mtu = ETH_DATA_LEN - 8; /* allow for LLC + SNAP */
2465 }
2466
2467 dev->max_mtu = max_mtu;
2468 dev->mtu = min(new_mtu, max_mtu);
2469 rtnl_unlock();
2470 return 0;
2471 }
2472
2473 static int qeth_get_mtu_outof_framesize(int framesize)
2474 {
2475 switch (framesize) {
2476 case 0x4000:
2477 return 8192;
2478 case 0x6000:
2479 return 16384;
2480 case 0xa000:
2481 return 32768;
2482 case 0xffff:
2483 return 57344;
2484 default:
2485 return 0;
2486 }
2487 }
2488
2489 static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2490 unsigned long data)
2491 {
2492 __u16 mtu, framesize;
2493 __u16 len;
2494 struct qeth_cmd_buffer *iob;
2495 u8 link_type = 0;
2496
2497 QETH_CARD_TEXT(card, 2, "ulpenacb");
2498
2499 iob = (struct qeth_cmd_buffer *) data;
2500 memcpy(&card->token.ulp_filter_r,
2501 QETH_ULP_ENABLE_RESP_FILTER_TOKEN(iob->data),
2502 QETH_MPC_TOKEN_LENGTH);
2503 if (IS_IQD(card)) {
2504 memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2);
2505 mtu = qeth_get_mtu_outof_framesize(framesize);
2506 } else {
2507 mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data);
2508 }
2509 *(u16 *)reply->param = mtu;
2510
2511 memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2);
2512 if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) {
2513 memcpy(&link_type,
2514 QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1);
2515 if (!qeth_is_supported_link_type(card, link_type))
2516 return -EPROTONOSUPPORT;
2517 }
2518
2519 card->info.link_type = link_type;
2520 QETH_CARD_TEXT_(card, 2, "link%d", card->info.link_type);
2521 return 0;
2522 }
2523
2524 static u8 qeth_mpc_select_prot_type(struct qeth_card *card)
2525 {
2526 if (IS_OSN(card))
2527 return QETH_PROT_OSN2;
2528 return IS_LAYER2(card) ? QETH_PROT_LAYER2 : QETH_PROT_TCPIP;
2529 }
2530
2531 static int qeth_ulp_enable(struct qeth_card *card)
2532 {
2533 u8 prot_type = qeth_mpc_select_prot_type(card);
2534 struct qeth_cmd_buffer *iob;
2535 u16 max_mtu;
2536 int rc;
2537
2538 QETH_CARD_TEXT(card, 2, "ulpenabl");
2539
2540 iob = qeth_mpc_alloc_cmd(card, ULP_ENABLE, ULP_ENABLE_SIZE);
2541 if (!iob)
2542 return -ENOMEM;
2543
2544 *(QETH_ULP_ENABLE_LINKNUM(iob->data)) = (u8) card->dev->dev_port;
2545 memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1);
2546 memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data),
2547 &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2548 memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data),
2549 &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH);
2550 rc = qeth_send_control_data(card, iob, qeth_ulp_enable_cb, &max_mtu);
2551 if (rc)
2552 return rc;
2553 return qeth_update_max_mtu(card, max_mtu);
2554 }
2555
2556 static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2557 unsigned long data)
2558 {
2559 struct qeth_cmd_buffer *iob;
2560
2561 QETH_CARD_TEXT(card, 2, "ulpstpcb");
2562
2563 iob = (struct qeth_cmd_buffer *) data;
2564 memcpy(&card->token.ulp_connection_r,
2565 QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2566 QETH_MPC_TOKEN_LENGTH);
2567 if (!strncmp("00S", QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2568 3)) {
2569 QETH_CARD_TEXT(card, 2, "olmlimit");
2570 dev_err(&card->gdev->dev, "A connection could not be "
2571 "established because of an OLM limit\n");
2572 return -EMLINK;
2573 }
2574 return 0;
2575 }
2576
2577 static int qeth_ulp_setup(struct qeth_card *card)
2578 {
2579 __u16 temp;
2580 struct qeth_cmd_buffer *iob;
2581
2582 QETH_CARD_TEXT(card, 2, "ulpsetup");
2583
2584 iob = qeth_mpc_alloc_cmd(card, ULP_SETUP, ULP_SETUP_SIZE);
2585 if (!iob)
2586 return -ENOMEM;
2587
2588 memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data),
2589 &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2590 memcpy(QETH_ULP_SETUP_CONNECTION_TOKEN(iob->data),
2591 &card->token.ulp_connection_w, QETH_MPC_TOKEN_LENGTH);
2592 memcpy(QETH_ULP_SETUP_FILTER_TOKEN(iob->data),
2593 &card->token.ulp_filter_r, QETH_MPC_TOKEN_LENGTH);
2594
2595 memcpy(QETH_ULP_SETUP_CUA(iob->data), &card->info.ddev_devno, 2);
2596 temp = (card->info.cula << 8) + card->info.unit_addr2;
2597 memcpy(QETH_ULP_SETUP_REAL_DEVADDR(iob->data), &temp, 2);
2598 return qeth_send_control_data(card, iob, qeth_ulp_setup_cb, NULL);
2599 }
2600
2601 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *q, int bidx)
2602 {
2603 struct qeth_qdio_out_buffer *newbuf;
2604
2605 newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, GFP_ATOMIC);
2606 if (!newbuf)
2607 return -ENOMEM;
2608
2609 newbuf->buffer = q->qdio_bufs[bidx];
2610 skb_queue_head_init(&newbuf->skb_list);
2611 lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key);
2612 newbuf->q = q;
2613 newbuf->next_pending = q->bufs[bidx];
2614 atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY);
2615 q->bufs[bidx] = newbuf;
2616 return 0;
2617 }
2618
2619 static void qeth_free_output_queue(struct qeth_qdio_out_q *q)
2620 {
2621 if (!q)
2622 return;
2623
2624 qeth_drain_output_queue(q, true);
2625 qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2626 kfree(q);
2627 }
2628
2629 static struct qeth_qdio_out_q *qeth_alloc_output_queue(void)
2630 {
2631 struct qeth_qdio_out_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
2632
2633 if (!q)
2634 return NULL;
2635
2636 if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
2637 kfree(q);
2638 return NULL;
2639 }
2640 return q;
2641 }
2642
2643 static void qeth_tx_completion_timer(struct timer_list *timer)
2644 {
2645 struct qeth_qdio_out_q *queue = from_timer(queue, timer, timer);
2646
2647 napi_schedule(&queue->napi);
2648 QETH_TXQ_STAT_INC(queue, completion_timer);
2649 }
2650
2651 static int qeth_alloc_qdio_queues(struct qeth_card *card)
2652 {
2653 int i, j;
2654
2655 QETH_CARD_TEXT(card, 2, "allcqdbf");
2656
2657 if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED,
2658 QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED)
2659 return 0;
2660
2661 QETH_CARD_TEXT(card, 2, "inq");
2662 card->qdio.in_q = qeth_alloc_qdio_queue();
2663 if (!card->qdio.in_q)
2664 goto out_nomem;
2665
2666 /* inbound buffer pool */
2667 if (qeth_alloc_buffer_pool(card))
2668 goto out_freeinq;
2669
2670 /* outbound */
2671 for (i = 0; i < card->qdio.no_out_queues; ++i) {
2672 struct qeth_qdio_out_q *queue;
2673
2674 queue = qeth_alloc_output_queue();
2675 if (!queue)
2676 goto out_freeoutq;
2677 QETH_CARD_TEXT_(card, 2, "outq %i", i);
2678 QETH_CARD_HEX(card, 2, &queue, sizeof(void *));
2679 card->qdio.out_qs[i] = queue;
2680 queue->card = card;
2681 queue->queue_no = i;
2682 spin_lock_init(&queue->lock);
2683 timer_setup(&queue->timer, qeth_tx_completion_timer, 0);
2684 queue->coalesce_usecs = QETH_TX_COALESCE_USECS;
2685 queue->max_coalesced_frames = QETH_TX_MAX_COALESCED_FRAMES;
2686 queue->priority = QETH_QIB_PQUE_PRIO_DEFAULT;
2687
2688 /* give outbound qeth_qdio_buffers their qdio_buffers */
2689 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2690 WARN_ON(queue->bufs[j]);
2691 if (qeth_init_qdio_out_buf(queue, j))
2692 goto out_freeoutqbufs;
2693 }
2694 }
2695
2696 /* completion */
2697 if (qeth_alloc_cq(card))
2698 goto out_freeoutq;
2699
2700 return 0;
2701
2702 out_freeoutqbufs:
2703 while (j > 0) {
2704 --j;
2705 kmem_cache_free(qeth_qdio_outbuf_cache,
2706 card->qdio.out_qs[i]->bufs[j]);
2707 card->qdio.out_qs[i]->bufs[j] = NULL;
2708 }
2709 out_freeoutq:
2710 while (i > 0) {
2711 qeth_free_output_queue(card->qdio.out_qs[--i]);
2712 card->qdio.out_qs[i] = NULL;
2713 }
2714 qeth_free_buffer_pool(card);
2715 out_freeinq:
2716 qeth_free_qdio_queue(card->qdio.in_q);
2717 card->qdio.in_q = NULL;
2718 out_nomem:
2719 atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
2720 return -ENOMEM;
2721 }
2722
2723 static void qeth_free_qdio_queues(struct qeth_card *card)
2724 {
2725 int i, j;
2726
2727 if (atomic_xchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED) ==
2728 QETH_QDIO_UNINITIALIZED)
2729 return;
2730
2731 qeth_free_cq(card);
2732 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2733 if (card->qdio.in_q->bufs[j].rx_skb)
2734 dev_kfree_skb_any(card->qdio.in_q->bufs[j].rx_skb);
2735 }
2736 qeth_free_qdio_queue(card->qdio.in_q);
2737 card->qdio.in_q = NULL;
2738 /* inbound buffer pool */
2739 qeth_free_buffer_pool(card);
2740 /* free outbound qdio_qs */
2741 for (i = 0; i < card->qdio.no_out_queues; i++) {
2742 qeth_free_output_queue(card->qdio.out_qs[i]);
2743 card->qdio.out_qs[i] = NULL;
2744 }
2745 }
2746
2747 static void qeth_fill_qib_parms(struct qeth_card *card,
2748 struct qeth_qib_parms *parms)
2749 {
2750 struct qeth_qdio_out_q *queue;
2751 unsigned int i;
2752
2753 parms->pcit_magic[0] = 'P';
2754 parms->pcit_magic[1] = 'C';
2755 parms->pcit_magic[2] = 'I';
2756 parms->pcit_magic[3] = 'T';
2757 ASCEBC(parms->pcit_magic, sizeof(parms->pcit_magic));
2758 parms->pcit_a = QETH_PCI_THRESHOLD_A(card);
2759 parms->pcit_b = QETH_PCI_THRESHOLD_B(card);
2760 parms->pcit_c = QETH_PCI_TIMER_VALUE(card);
2761
2762 parms->blkt_magic[0] = 'B';
2763 parms->blkt_magic[1] = 'L';
2764 parms->blkt_magic[2] = 'K';
2765 parms->blkt_magic[3] = 'T';
2766 ASCEBC(parms->blkt_magic, sizeof(parms->blkt_magic));
2767 parms->blkt_total = card->info.blkt.time_total;
2768 parms->blkt_inter_packet = card->info.blkt.inter_packet;
2769 parms->blkt_inter_packet_jumbo = card->info.blkt.inter_packet_jumbo;
2770
2771 /* Prio-queueing implicitly uses the default priorities: */
2772 if (qeth_uses_tx_prio_queueing(card) || card->qdio.no_out_queues == 1)
2773 return;
2774
2775 parms->pque_magic[0] = 'P';
2776 parms->pque_magic[1] = 'Q';
2777 parms->pque_magic[2] = 'U';
2778 parms->pque_magic[3] = 'E';
2779 ASCEBC(parms->pque_magic, sizeof(parms->pque_magic));
2780 parms->pque_order = QETH_QIB_PQUE_ORDER_RR;
2781 parms->pque_units = QETH_QIB_PQUE_UNITS_SBAL;
2782
2783 qeth_for_each_output_queue(card, queue, i)
2784 parms->pque_priority[i] = queue->priority;
2785 }
2786
2787 static int qeth_qdio_activate(struct qeth_card *card)
2788 {
2789 QETH_CARD_TEXT(card, 3, "qdioact");
2790 return qdio_activate(CARD_DDEV(card));
2791 }
2792
2793 static int qeth_dm_act(struct qeth_card *card)
2794 {
2795 struct qeth_cmd_buffer *iob;
2796
2797 QETH_CARD_TEXT(card, 2, "dmact");
2798
2799 iob = qeth_mpc_alloc_cmd(card, DM_ACT, DM_ACT_SIZE);
2800 if (!iob)
2801 return -ENOMEM;
2802
2803 memcpy(QETH_DM_ACT_DEST_ADDR(iob->data),
2804 &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2805 memcpy(QETH_DM_ACT_CONNECTION_TOKEN(iob->data),
2806 &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2807 return qeth_send_control_data(card, iob, NULL, NULL);
2808 }
2809
2810 static int qeth_mpc_initialize(struct qeth_card *card)
2811 {
2812 int rc;
2813
2814 QETH_CARD_TEXT(card, 2, "mpcinit");
2815
2816 rc = qeth_issue_next_read(card);
2817 if (rc) {
2818 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
2819 return rc;
2820 }
2821 rc = qeth_cm_enable(card);
2822 if (rc) {
2823 QETH_CARD_TEXT_(card, 2, "2err%d", rc);
2824 return rc;
2825 }
2826 rc = qeth_cm_setup(card);
2827 if (rc) {
2828 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
2829 return rc;
2830 }
2831 rc = qeth_ulp_enable(card);
2832 if (rc) {
2833 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
2834 return rc;
2835 }
2836 rc = qeth_ulp_setup(card);
2837 if (rc) {
2838 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2839 return rc;
2840 }
2841 rc = qeth_alloc_qdio_queues(card);
2842 if (rc) {
2843 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2844 return rc;
2845 }
2846 rc = qeth_qdio_establish(card);
2847 if (rc) {
2848 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
2849 qeth_free_qdio_queues(card);
2850 return rc;
2851 }
2852 rc = qeth_qdio_activate(card);
2853 if (rc) {
2854 QETH_CARD_TEXT_(card, 2, "7err%d", rc);
2855 return rc;
2856 }
2857 rc = qeth_dm_act(card);
2858 if (rc) {
2859 QETH_CARD_TEXT_(card, 2, "8err%d", rc);
2860 return rc;
2861 }
2862
2863 return 0;
2864 }
2865
2866 static void qeth_print_status_message(struct qeth_card *card)
2867 {
2868 switch (card->info.type) {
2869 case QETH_CARD_TYPE_OSD:
2870 case QETH_CARD_TYPE_OSM:
2871 case QETH_CARD_TYPE_OSX:
2872 /* VM will use a non-zero first character
2873 * to indicate a HiperSockets like reporting
2874 * of the level OSA sets the first character to zero
2875 * */
2876 if (!card->info.mcl_level[0]) {
2877 sprintf(card->info.mcl_level, "%02x%02x",
2878 card->info.mcl_level[2],
2879 card->info.mcl_level[3]);
2880 break;
2881 }
2882 fallthrough;
2883 case QETH_CARD_TYPE_IQD:
2884 if (IS_VM_NIC(card) || (card->info.mcl_level[0] & 0x80)) {
2885 card->info.mcl_level[0] = (char) _ebcasc[(__u8)
2886 card->info.mcl_level[0]];
2887 card->info.mcl_level[1] = (char) _ebcasc[(__u8)
2888 card->info.mcl_level[1]];
2889 card->info.mcl_level[2] = (char) _ebcasc[(__u8)
2890 card->info.mcl_level[2]];
2891 card->info.mcl_level[3] = (char) _ebcasc[(__u8)
2892 card->info.mcl_level[3]];
2893 card->info.mcl_level[QETH_MCL_LENGTH] = 0;
2894 }
2895 break;
2896 default:
2897 memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1);
2898 }
2899 dev_info(&card->gdev->dev,
2900 "Device is a%s card%s%s%s\nwith link type %s.\n",
2901 qeth_get_cardname(card),
2902 (card->info.mcl_level[0]) ? " (level: " : "",
2903 (card->info.mcl_level[0]) ? card->info.mcl_level : "",
2904 (card->info.mcl_level[0]) ? ")" : "",
2905 qeth_get_cardname_short(card));
2906 }
2907
2908 static void qeth_initialize_working_pool_list(struct qeth_card *card)
2909 {
2910 struct qeth_buffer_pool_entry *entry;
2911
2912 QETH_CARD_TEXT(card, 5, "inwrklst");
2913
2914 list_for_each_entry(entry,
2915 &card->qdio.init_pool.entry_list, init_list) {
2916 qeth_put_buffer_pool_entry(card, entry);
2917 }
2918 }
2919
2920 static struct qeth_buffer_pool_entry *qeth_find_free_buffer_pool_entry(
2921 struct qeth_card *card)
2922 {
2923 struct qeth_buffer_pool_entry *entry;
2924 int i, free;
2925
2926 if (list_empty(&card->qdio.in_buf_pool.entry_list))
2927 return NULL;
2928
2929 list_for_each_entry(entry, &card->qdio.in_buf_pool.entry_list, list) {
2930 free = 1;
2931 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2932 if (page_count(entry->elements[i]) > 1) {
2933 free = 0;
2934 break;
2935 }
2936 }
2937 if (free) {
2938 list_del_init(&entry->list);
2939 return entry;
2940 }
2941 }
2942
2943 /* no free buffer in pool so take first one and swap pages */
2944 entry = list_first_entry(&card->qdio.in_buf_pool.entry_list,
2945 struct qeth_buffer_pool_entry, list);
2946 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2947 if (page_count(entry->elements[i]) > 1) {
2948 struct page *page = dev_alloc_page();
2949
2950 if (!page)
2951 return NULL;
2952
2953 __free_page(entry->elements[i]);
2954 entry->elements[i] = page;
2955 QETH_CARD_STAT_INC(card, rx_sg_alloc_page);
2956 }
2957 }
2958 list_del_init(&entry->list);
2959 return entry;
2960 }
2961
2962 static int qeth_init_input_buffer(struct qeth_card *card,
2963 struct qeth_qdio_buffer *buf)
2964 {
2965 struct qeth_buffer_pool_entry *pool_entry = buf->pool_entry;
2966 int i;
2967
2968 if ((card->options.cq == QETH_CQ_ENABLED) && (!buf->rx_skb)) {
2969 buf->rx_skb = netdev_alloc_skb(card->dev,
2970 ETH_HLEN +
2971 sizeof(struct ipv6hdr));
2972 if (!buf->rx_skb)
2973 return -ENOMEM;
2974 }
2975
2976 if (!pool_entry) {
2977 pool_entry = qeth_find_free_buffer_pool_entry(card);
2978 if (!pool_entry)
2979 return -ENOBUFS;
2980
2981 buf->pool_entry = pool_entry;
2982 }
2983
2984 /*
2985 * since the buffer is accessed only from the input_tasklet
2986 * there shouldn't be a need to synchronize; also, since we use
2987 * the QETH_IN_BUF_REQUEUE_THRESHOLD we should never run out off
2988 * buffers
2989 */
2990 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2991 buf->buffer->element[i].length = PAGE_SIZE;
2992 buf->buffer->element[i].addr =
2993 page_to_phys(pool_entry->elements[i]);
2994 if (i == QETH_MAX_BUFFER_ELEMENTS(card) - 1)
2995 buf->buffer->element[i].eflags = SBAL_EFLAGS_LAST_ENTRY;
2996 else
2997 buf->buffer->element[i].eflags = 0;
2998 buf->buffer->element[i].sflags = 0;
2999 }
3000 return 0;
3001 }
3002
3003 static unsigned int qeth_tx_select_bulk_max(struct qeth_card *card,
3004 struct qeth_qdio_out_q *queue)
3005 {
3006 if (!IS_IQD(card) ||
3007 qeth_iqd_is_mcast_queue(card, queue) ||
3008 card->options.cq == QETH_CQ_ENABLED ||
3009 qdio_get_ssqd_desc(CARD_DDEV(card), &card->ssqd))
3010 return 1;
3011
3012 return card->ssqd.mmwc ? card->ssqd.mmwc : 1;
3013 }
3014
3015 static int qeth_init_qdio_queues(struct qeth_card *card)
3016 {
3017 unsigned int rx_bufs = card->qdio.in_buf_pool.buf_count;
3018 unsigned int i;
3019 int rc;
3020
3021 QETH_CARD_TEXT(card, 2, "initqdqs");
3022
3023 /* inbound queue */
3024 qdio_reset_buffers(card->qdio.in_q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
3025 memset(&card->rx, 0, sizeof(struct qeth_rx));
3026
3027 qeth_initialize_working_pool_list(card);
3028 /*give only as many buffers to hardware as we have buffer pool entries*/
3029 for (i = 0; i < rx_bufs; i++) {
3030 rc = qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]);
3031 if (rc)
3032 return rc;
3033 }
3034
3035 card->qdio.in_q->next_buf_to_init = QDIO_BUFNR(rx_bufs);
3036 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0, 0, rx_bufs);
3037 if (rc) {
3038 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
3039 return rc;
3040 }
3041
3042 /* completion */
3043 rc = qeth_cq_init(card);
3044 if (rc) {
3045 return rc;
3046 }
3047
3048 /* outbound queue */
3049 for (i = 0; i < card->qdio.no_out_queues; ++i) {
3050 struct qeth_qdio_out_q *queue = card->qdio.out_qs[i];
3051
3052 qdio_reset_buffers(queue->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
3053 queue->max_elements = QETH_MAX_BUFFER_ELEMENTS(card);
3054 queue->next_buf_to_fill = 0;
3055 queue->do_pack = 0;
3056 queue->prev_hdr = NULL;
3057 queue->coalesced_frames = 0;
3058 queue->bulk_start = 0;
3059 queue->bulk_count = 0;
3060 queue->bulk_max = qeth_tx_select_bulk_max(card, queue);
3061 atomic_set(&queue->used_buffers, 0);
3062 atomic_set(&queue->set_pci_flags_count, 0);
3063 netdev_tx_reset_queue(netdev_get_tx_queue(card->dev, i));
3064 }
3065 return 0;
3066 }
3067
3068 static void qeth_ipa_finalize_cmd(struct qeth_card *card,
3069 struct qeth_cmd_buffer *iob)
3070 {
3071 qeth_mpc_finalize_cmd(card, iob);
3072
3073 /* override with IPA-specific values: */
3074 __ipa_cmd(iob)->hdr.seqno = card->seqno.ipa++;
3075 }
3076
3077 void qeth_prepare_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
3078 u16 cmd_length,
3079 bool (*match)(struct qeth_cmd_buffer *iob,
3080 struct qeth_cmd_buffer *reply))
3081 {
3082 u8 prot_type = qeth_mpc_select_prot_type(card);
3083 u16 total_length = iob->length;
3084
3085 qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, total_length,
3086 iob->data);
3087 iob->finalize = qeth_ipa_finalize_cmd;
3088 iob->match = match;
3089
3090 memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
3091 memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &total_length, 2);
3092 memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1);
3093 memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &cmd_length, 2);
3094 memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &cmd_length, 2);
3095 memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
3096 &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
3097 memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &cmd_length, 2);
3098 }
3099 EXPORT_SYMBOL_GPL(qeth_prepare_ipa_cmd);
3100
3101 static bool qeth_ipa_match_reply(struct qeth_cmd_buffer *iob,
3102 struct qeth_cmd_buffer *reply)
3103 {
3104 struct qeth_ipa_cmd *ipa_reply = __ipa_reply(reply);
3105
3106 return ipa_reply && (__ipa_cmd(iob)->hdr.seqno == ipa_reply->hdr.seqno);
3107 }
3108
3109 struct qeth_cmd_buffer *qeth_ipa_alloc_cmd(struct qeth_card *card,
3110 enum qeth_ipa_cmds cmd_code,
3111 enum qeth_prot_versions prot,
3112 unsigned int data_length)
3113 {
3114 struct qeth_cmd_buffer *iob;
3115 struct qeth_ipacmd_hdr *hdr;
3116
3117 data_length += offsetof(struct qeth_ipa_cmd, data);
3118 iob = qeth_alloc_cmd(&card->write, IPA_PDU_HEADER_SIZE + data_length, 1,
3119 QETH_IPA_TIMEOUT);
3120 if (!iob)
3121 return NULL;
3122
3123 qeth_prepare_ipa_cmd(card, iob, data_length, qeth_ipa_match_reply);
3124
3125 hdr = &__ipa_cmd(iob)->hdr;
3126 hdr->command = cmd_code;
3127 hdr->initiator = IPA_CMD_INITIATOR_HOST;
3128 /* hdr->seqno is set by qeth_send_control_data() */
3129 hdr->adapter_type = QETH_LINK_TYPE_FAST_ETH;
3130 hdr->rel_adapter_no = (u8) card->dev->dev_port;
3131 hdr->prim_version_no = IS_LAYER2(card) ? 2 : 1;
3132 hdr->param_count = 1;
3133 hdr->prot_version = prot;
3134 return iob;
3135 }
3136 EXPORT_SYMBOL_GPL(qeth_ipa_alloc_cmd);
3137
3138 static int qeth_send_ipa_cmd_cb(struct qeth_card *card,
3139 struct qeth_reply *reply, unsigned long data)
3140 {
3141 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3142
3143 return (cmd->hdr.return_code) ? -EIO : 0;
3144 }
3145
3146 /**
3147 * qeth_send_ipa_cmd() - send an IPA command
3148 *
3149 * See qeth_send_control_data() for explanation of the arguments.
3150 */
3151
3152 int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
3153 int (*reply_cb)(struct qeth_card *, struct qeth_reply*,
3154 unsigned long),
3155 void *reply_param)
3156 {
3157 int rc;
3158
3159 QETH_CARD_TEXT(card, 4, "sendipa");
3160
3161 if (card->read_or_write_problem) {
3162 qeth_put_cmd(iob);
3163 return -EIO;
3164 }
3165
3166 if (reply_cb == NULL)
3167 reply_cb = qeth_send_ipa_cmd_cb;
3168 rc = qeth_send_control_data(card, iob, reply_cb, reply_param);
3169 if (rc == -ETIME) {
3170 qeth_clear_ipacmd_list(card);
3171 qeth_schedule_recovery(card);
3172 }
3173 return rc;
3174 }
3175 EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd);
3176
3177 static int qeth_send_startlan_cb(struct qeth_card *card,
3178 struct qeth_reply *reply, unsigned long data)
3179 {
3180 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3181
3182 if (cmd->hdr.return_code == IPA_RC_LAN_OFFLINE)
3183 return -ENETDOWN;
3184
3185 return (cmd->hdr.return_code) ? -EIO : 0;
3186 }
3187
3188 static int qeth_send_startlan(struct qeth_card *card)
3189 {
3190 struct qeth_cmd_buffer *iob;
3191
3192 QETH_CARD_TEXT(card, 2, "strtlan");
3193
3194 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_STARTLAN, QETH_PROT_NONE, 0);
3195 if (!iob)
3196 return -ENOMEM;
3197 return qeth_send_ipa_cmd(card, iob, qeth_send_startlan_cb, NULL);
3198 }
3199
3200 static int qeth_setadpparms_inspect_rc(struct qeth_ipa_cmd *cmd)
3201 {
3202 if (!cmd->hdr.return_code)
3203 cmd->hdr.return_code =
3204 cmd->data.setadapterparms.hdr.return_code;
3205 return cmd->hdr.return_code;
3206 }
3207
3208 static int qeth_query_setadapterparms_cb(struct qeth_card *card,
3209 struct qeth_reply *reply, unsigned long data)
3210 {
3211 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3212 struct qeth_query_cmds_supp *query_cmd;
3213
3214 QETH_CARD_TEXT(card, 3, "quyadpcb");
3215 if (qeth_setadpparms_inspect_rc(cmd))
3216 return -EIO;
3217
3218 query_cmd = &cmd->data.setadapterparms.data.query_cmds_supp;
3219 if (query_cmd->lan_type & 0x7f) {
3220 if (!qeth_is_supported_link_type(card, query_cmd->lan_type))
3221 return -EPROTONOSUPPORT;
3222
3223 card->info.link_type = query_cmd->lan_type;
3224 QETH_CARD_TEXT_(card, 2, "lnk %d", card->info.link_type);
3225 }
3226
3227 card->options.adp.supported = query_cmd->supported_cmds;
3228 return 0;
3229 }
3230
3231 static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card,
3232 enum qeth_ipa_setadp_cmd adp_cmd,
3233 unsigned int data_length)
3234 {
3235 struct qeth_ipacmd_setadpparms_hdr *hdr;
3236 struct qeth_cmd_buffer *iob;
3237
3238 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETADAPTERPARMS, QETH_PROT_IPV4,
3239 data_length +
3240 offsetof(struct qeth_ipacmd_setadpparms,
3241 data));
3242 if (!iob)
3243 return NULL;
3244
3245 hdr = &__ipa_cmd(iob)->data.setadapterparms.hdr;
3246 hdr->cmdlength = sizeof(*hdr) + data_length;
3247 hdr->command_code = adp_cmd;
3248 hdr->used_total = 1;
3249 hdr->seq_no = 1;
3250 return iob;
3251 }
3252
3253 static int qeth_query_setadapterparms(struct qeth_card *card)
3254 {
3255 int rc;
3256 struct qeth_cmd_buffer *iob;
3257
3258 QETH_CARD_TEXT(card, 3, "queryadp");
3259 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_COMMANDS_SUPPORTED,
3260 SETADP_DATA_SIZEOF(query_cmds_supp));
3261 if (!iob)
3262 return -ENOMEM;
3263 rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL);
3264 return rc;
3265 }
3266
3267 static int qeth_query_ipassists_cb(struct qeth_card *card,
3268 struct qeth_reply *reply, unsigned long data)
3269 {
3270 struct qeth_ipa_cmd *cmd;
3271
3272 QETH_CARD_TEXT(card, 2, "qipasscb");
3273
3274 cmd = (struct qeth_ipa_cmd *) data;
3275
3276 switch (cmd->hdr.return_code) {
3277 case IPA_RC_SUCCESS:
3278 break;
3279 case IPA_RC_NOTSUPP:
3280 case IPA_RC_L2_UNSUPPORTED_CMD:
3281 QETH_CARD_TEXT(card, 2, "ipaunsup");
3282 card->options.ipa4.supported |= IPA_SETADAPTERPARMS;
3283 card->options.ipa6.supported |= IPA_SETADAPTERPARMS;
3284 return -EOPNOTSUPP;
3285 default:
3286 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Unhandled rc=%#x\n",
3287 CARD_DEVID(card), cmd->hdr.return_code);
3288 return -EIO;
3289 }
3290
3291 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
3292 card->options.ipa4 = cmd->hdr.assists;
3293 else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
3294 card->options.ipa6 = cmd->hdr.assists;
3295 else
3296 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Flawed LIC detected\n",
3297 CARD_DEVID(card));
3298 return 0;
3299 }
3300
3301 static int qeth_query_ipassists(struct qeth_card *card,
3302 enum qeth_prot_versions prot)
3303 {
3304 int rc;
3305 struct qeth_cmd_buffer *iob;
3306
3307 QETH_CARD_TEXT_(card, 2, "qipassi%i", prot);
3308 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_QIPASSIST, prot, 0);
3309 if (!iob)
3310 return -ENOMEM;
3311 rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL);
3312 return rc;
3313 }
3314
3315 static int qeth_query_switch_attributes_cb(struct qeth_card *card,
3316 struct qeth_reply *reply, unsigned long data)
3317 {
3318 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3319 struct qeth_query_switch_attributes *attrs;
3320 struct qeth_switch_info *sw_info;
3321
3322 QETH_CARD_TEXT(card, 2, "qswiatcb");
3323 if (qeth_setadpparms_inspect_rc(cmd))
3324 return -EIO;
3325
3326 sw_info = (struct qeth_switch_info *)reply->param;
3327 attrs = &cmd->data.setadapterparms.data.query_switch_attributes;
3328 sw_info->capabilities = attrs->capabilities;
3329 sw_info->settings = attrs->settings;
3330 QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities,
3331 sw_info->settings);
3332 return 0;
3333 }
3334
3335 int qeth_query_switch_attributes(struct qeth_card *card,
3336 struct qeth_switch_info *sw_info)
3337 {
3338 struct qeth_cmd_buffer *iob;
3339
3340 QETH_CARD_TEXT(card, 2, "qswiattr");
3341 if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES))
3342 return -EOPNOTSUPP;
3343 if (!netif_carrier_ok(card->dev))
3344 return -ENOMEDIUM;
3345 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES, 0);
3346 if (!iob)
3347 return -ENOMEM;
3348 return qeth_send_ipa_cmd(card, iob,
3349 qeth_query_switch_attributes_cb, sw_info);
3350 }
3351
3352 struct qeth_cmd_buffer *qeth_get_diag_cmd(struct qeth_card *card,
3353 enum qeth_diags_cmds sub_cmd,
3354 unsigned int data_length)
3355 {
3356 struct qeth_ipacmd_diagass *cmd;
3357 struct qeth_cmd_buffer *iob;
3358
3359 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SET_DIAG_ASS, QETH_PROT_NONE,
3360 DIAG_HDR_LEN + data_length);
3361 if (!iob)
3362 return NULL;
3363
3364 cmd = &__ipa_cmd(iob)->data.diagass;
3365 cmd->subcmd_len = DIAG_SUB_HDR_LEN + data_length;
3366 cmd->subcmd = sub_cmd;
3367 return iob;
3368 }
3369 EXPORT_SYMBOL_GPL(qeth_get_diag_cmd);
3370
3371 static int qeth_query_setdiagass_cb(struct qeth_card *card,
3372 struct qeth_reply *reply, unsigned long data)
3373 {
3374 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3375 u16 rc = cmd->hdr.return_code;
3376
3377 if (rc) {
3378 QETH_CARD_TEXT_(card, 2, "diagq:%x", rc);
3379 return -EIO;
3380 }
3381
3382 card->info.diagass_support = cmd->data.diagass.ext;
3383 return 0;
3384 }
3385
3386 static int qeth_query_setdiagass(struct qeth_card *card)
3387 {
3388 struct qeth_cmd_buffer *iob;
3389
3390 QETH_CARD_TEXT(card, 2, "qdiagass");
3391 iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_QUERY, 0);
3392 if (!iob)
3393 return -ENOMEM;
3394 return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL);
3395 }
3396
3397 static void qeth_get_trap_id(struct qeth_card *card, struct qeth_trap_id *tid)
3398 {
3399 unsigned long info = get_zeroed_page(GFP_KERNEL);
3400 struct sysinfo_2_2_2 *info222 = (struct sysinfo_2_2_2 *)info;
3401 struct sysinfo_3_2_2 *info322 = (struct sysinfo_3_2_2 *)info;
3402 struct ccw_dev_id ccwid;
3403 int level;
3404
3405 tid->chpid = card->info.chpid;
3406 ccw_device_get_id(CARD_RDEV(card), &ccwid);
3407 tid->ssid = ccwid.ssid;
3408 tid->devno = ccwid.devno;
3409 if (!info)
3410 return;
3411 level = stsi(NULL, 0, 0, 0);
3412 if ((level >= 2) && (stsi(info222, 2, 2, 2) == 0))
3413 tid->lparnr = info222->lpar_number;
3414 if ((level >= 3) && (stsi(info322, 3, 2, 2) == 0)) {
3415 EBCASC(info322->vm[0].name, sizeof(info322->vm[0].name));
3416 memcpy(tid->vmname, info322->vm[0].name, sizeof(tid->vmname));
3417 }
3418 free_page(info);
3419 }
3420
3421 static int qeth_hw_trap_cb(struct qeth_card *card,
3422 struct qeth_reply *reply, unsigned long data)
3423 {
3424 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3425 u16 rc = cmd->hdr.return_code;
3426
3427 if (rc) {
3428 QETH_CARD_TEXT_(card, 2, "trapc:%x", rc);
3429 return -EIO;
3430 }
3431 return 0;
3432 }
3433
3434 int qeth_hw_trap(struct qeth_card *card, enum qeth_diags_trap_action action)
3435 {
3436 struct qeth_cmd_buffer *iob;
3437 struct qeth_ipa_cmd *cmd;
3438
3439 QETH_CARD_TEXT(card, 2, "diagtrap");
3440 iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_TRAP, 64);
3441 if (!iob)
3442 return -ENOMEM;
3443 cmd = __ipa_cmd(iob);
3444 cmd->data.diagass.type = 1;
3445 cmd->data.diagass.action = action;
3446 switch (action) {
3447 case QETH_DIAGS_TRAP_ARM:
3448 cmd->data.diagass.options = 0x0003;
3449 cmd->data.diagass.ext = 0x00010000 +
3450 sizeof(struct qeth_trap_id);
3451 qeth_get_trap_id(card,
3452 (struct qeth_trap_id *)cmd->data.diagass.cdata);
3453 break;
3454 case QETH_DIAGS_TRAP_DISARM:
3455 cmd->data.diagass.options = 0x0001;
3456 break;
3457 case QETH_DIAGS_TRAP_CAPTURE:
3458 break;
3459 }
3460 return qeth_send_ipa_cmd(card, iob, qeth_hw_trap_cb, NULL);
3461 }
3462
3463 static int qeth_check_qdio_errors(struct qeth_card *card,
3464 struct qdio_buffer *buf,
3465 unsigned int qdio_error,
3466 const char *dbftext)
3467 {
3468 if (qdio_error) {
3469 QETH_CARD_TEXT(card, 2, dbftext);
3470 QETH_CARD_TEXT_(card, 2, " F15=%02X",
3471 buf->element[15].sflags);
3472 QETH_CARD_TEXT_(card, 2, " F14=%02X",
3473 buf->element[14].sflags);
3474 QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error);
3475 if ((buf->element[15].sflags) == 0x12) {
3476 QETH_CARD_STAT_INC(card, rx_fifo_errors);
3477 return 0;
3478 } else
3479 return 1;
3480 }
3481 return 0;
3482 }
3483
3484 static unsigned int qeth_rx_refill_queue(struct qeth_card *card,
3485 unsigned int count)
3486 {
3487 struct qeth_qdio_q *queue = card->qdio.in_q;
3488 struct list_head *lh;
3489 int i;
3490 int rc;
3491 int newcount = 0;
3492
3493 /* only requeue at a certain threshold to avoid SIGAs */
3494 if (count >= QETH_IN_BUF_REQUEUE_THRESHOLD(card)) {
3495 for (i = queue->next_buf_to_init;
3496 i < queue->next_buf_to_init + count; ++i) {
3497 if (qeth_init_input_buffer(card,
3498 &queue->bufs[QDIO_BUFNR(i)])) {
3499 break;
3500 } else {
3501 newcount++;
3502 }
3503 }
3504
3505 if (newcount < count) {
3506 /* we are in memory shortage so we switch back to
3507 traditional skb allocation and drop packages */
3508 atomic_set(&card->force_alloc_skb, 3);
3509 count = newcount;
3510 } else {
3511 atomic_add_unless(&card->force_alloc_skb, -1, 0);
3512 }
3513
3514 if (!count) {
3515 i = 0;
3516 list_for_each(lh, &card->qdio.in_buf_pool.entry_list)
3517 i++;
3518 if (i == card->qdio.in_buf_pool.buf_count) {
3519 QETH_CARD_TEXT(card, 2, "qsarbw");
3520 schedule_delayed_work(
3521 &card->buffer_reclaim_work,
3522 QETH_RECLAIM_WORK_TIME);
3523 }
3524 return 0;
3525 }
3526
3527 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0,
3528 queue->next_buf_to_init, count);
3529 if (rc) {
3530 QETH_CARD_TEXT(card, 2, "qinberr");
3531 }
3532 queue->next_buf_to_init = QDIO_BUFNR(queue->next_buf_to_init +
3533 count);
3534 return count;
3535 }
3536
3537 return 0;
3538 }
3539
3540 static void qeth_buffer_reclaim_work(struct work_struct *work)
3541 {
3542 struct qeth_card *card = container_of(to_delayed_work(work),
3543 struct qeth_card,
3544 buffer_reclaim_work);
3545
3546 local_bh_disable();
3547 napi_schedule(&card->napi);
3548 /* kick-start the NAPI softirq: */
3549 local_bh_enable();
3550 }
3551
3552 static void qeth_handle_send_error(struct qeth_card *card,
3553 struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err)
3554 {
3555 int sbalf15 = buffer->buffer->element[15].sflags;
3556
3557 QETH_CARD_TEXT(card, 6, "hdsnderr");
3558 qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr");
3559
3560 if (!qdio_err)
3561 return;
3562
3563 if ((sbalf15 >= 15) && (sbalf15 <= 31))
3564 return;
3565
3566 QETH_CARD_TEXT(card, 1, "lnkfail");
3567 QETH_CARD_TEXT_(card, 1, "%04x %02x",
3568 (u16)qdio_err, (u8)sbalf15);
3569 }
3570
3571 /**
3572 * qeth_prep_flush_pack_buffer - Prepares flushing of a packing buffer.
3573 * @queue: queue to check for packing buffer
3574 *
3575 * Returns number of buffers that were prepared for flush.
3576 */
3577 static int qeth_prep_flush_pack_buffer(struct qeth_qdio_out_q *queue)
3578 {
3579 struct qeth_qdio_out_buffer *buffer;
3580
3581 buffer = queue->bufs[queue->next_buf_to_fill];
3582 if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) &&
3583 (buffer->next_element_to_fill > 0)) {
3584 /* it's a packing buffer */
3585 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3586 queue->next_buf_to_fill =
3587 QDIO_BUFNR(queue->next_buf_to_fill + 1);
3588 return 1;
3589 }
3590 return 0;
3591 }
3592
3593 /*
3594 * Switched to packing state if the number of used buffers on a queue
3595 * reaches a certain limit.
3596 */
3597 static void qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q *queue)
3598 {
3599 if (!queue->do_pack) {
3600 if (atomic_read(&queue->used_buffers)
3601 >= QETH_HIGH_WATERMARK_PACK){
3602 /* switch non-PACKING -> PACKING */
3603 QETH_CARD_TEXT(queue->card, 6, "np->pack");
3604 QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3605 queue->do_pack = 1;
3606 }
3607 }
3608 }
3609
3610 /*
3611 * Switches from packing to non-packing mode. If there is a packing
3612 * buffer on the queue this buffer will be prepared to be flushed.
3613 * In that case 1 is returned to inform the caller. If no buffer
3614 * has to be flushed, zero is returned.
3615 */
3616 static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue)
3617 {
3618 if (queue->do_pack) {
3619 if (atomic_read(&queue->used_buffers)
3620 <= QETH_LOW_WATERMARK_PACK) {
3621 /* switch PACKING -> non-PACKING */
3622 QETH_CARD_TEXT(queue->card, 6, "pack->np");
3623 QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3624 queue->do_pack = 0;
3625 return qeth_prep_flush_pack_buffer(queue);
3626 }
3627 }
3628 return 0;
3629 }
3630
3631 static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
3632 int count)
3633 {
3634 struct qeth_qdio_out_buffer *buf = queue->bufs[index];
3635 unsigned int qdio_flags = QDIO_FLAG_SYNC_OUTPUT;
3636 struct qeth_card *card = queue->card;
3637 int rc;
3638 int i;
3639
3640 for (i = index; i < index + count; ++i) {
3641 unsigned int bidx = QDIO_BUFNR(i);
3642 struct sk_buff *skb;
3643
3644 buf = queue->bufs[bidx];
3645 buf->buffer->element[buf->next_element_to_fill - 1].eflags |=
3646 SBAL_EFLAGS_LAST_ENTRY;
3647 queue->coalesced_frames += buf->frames;
3648
3649 if (queue->bufstates)
3650 queue->bufstates[bidx].user = buf;
3651
3652 if (IS_IQD(card)) {
3653 skb_queue_walk(&buf->skb_list, skb)
3654 skb_tx_timestamp(skb);
3655 }
3656 }
3657
3658 if (!IS_IQD(card)) {
3659 if (!queue->do_pack) {
3660 if ((atomic_read(&queue->used_buffers) >=
3661 (QETH_HIGH_WATERMARK_PACK -
3662 QETH_WATERMARK_PACK_FUZZ)) &&
3663 !atomic_read(&queue->set_pci_flags_count)) {
3664 /* it's likely that we'll go to packing
3665 * mode soon */
3666 atomic_inc(&queue->set_pci_flags_count);
3667 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3668 }
3669 } else {
3670 if (!atomic_read(&queue->set_pci_flags_count)) {
3671 /*
3672 * there's no outstanding PCI any more, so we
3673 * have to request a PCI to be sure the the PCI
3674 * will wake at some time in the future then we
3675 * can flush packed buffers that might still be
3676 * hanging around, which can happen if no
3677 * further send was requested by the stack
3678 */
3679 atomic_inc(&queue->set_pci_flags_count);
3680 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3681 }
3682 }
3683
3684 if (atomic_read(&queue->set_pci_flags_count))
3685 qdio_flags |= QDIO_FLAG_PCI_OUT;
3686 }
3687
3688 QETH_TXQ_STAT_INC(queue, doorbell);
3689 rc = do_QDIO(CARD_DDEV(queue->card), qdio_flags,
3690 queue->queue_no, index, count);
3691
3692 /* Fake the TX completion interrupt: */
3693 if (IS_IQD(card)) {
3694 unsigned int frames = READ_ONCE(queue->max_coalesced_frames);
3695 unsigned int usecs = READ_ONCE(queue->coalesce_usecs);
3696
3697 if (frames && queue->coalesced_frames >= frames) {
3698 napi_schedule(&queue->napi);
3699 queue->coalesced_frames = 0;
3700 QETH_TXQ_STAT_INC(queue, coal_frames);
3701 } else if (usecs) {
3702 qeth_tx_arm_timer(queue, usecs);
3703 }
3704 }
3705
3706 if (rc) {
3707 /* ignore temporary SIGA errors without busy condition */
3708 if (rc == -ENOBUFS)
3709 return;
3710 QETH_CARD_TEXT(queue->card, 2, "flushbuf");
3711 QETH_CARD_TEXT_(queue->card, 2, " q%d", queue->queue_no);
3712 QETH_CARD_TEXT_(queue->card, 2, " idx%d", index);
3713 QETH_CARD_TEXT_(queue->card, 2, " c%d", count);
3714 QETH_CARD_TEXT_(queue->card, 2, " err%d", rc);
3715
3716 /* this must not happen under normal circumstances. if it
3717 * happens something is really wrong -> recover */
3718 qeth_schedule_recovery(queue->card);
3719 return;
3720 }
3721 }
3722
3723 static void qeth_flush_queue(struct qeth_qdio_out_q *queue)
3724 {
3725 qeth_flush_buffers(queue, queue->bulk_start, queue->bulk_count);
3726
3727 queue->bulk_start = QDIO_BUFNR(queue->bulk_start + queue->bulk_count);
3728 queue->prev_hdr = NULL;
3729 queue->bulk_count = 0;
3730 }
3731
3732 static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue)
3733 {
3734 /*
3735 * check if weed have to switch to non-packing mode or if
3736 * we have to get a pci flag out on the queue
3737 */
3738 if ((atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) ||
3739 !atomic_read(&queue->set_pci_flags_count)) {
3740 unsigned int index, flush_cnt;
3741 bool q_was_packing;
3742
3743 spin_lock(&queue->lock);
3744
3745 index = queue->next_buf_to_fill;
3746 q_was_packing = queue->do_pack;
3747
3748 flush_cnt = qeth_switch_to_nonpacking_if_needed(queue);
3749 if (!flush_cnt && !atomic_read(&queue->set_pci_flags_count))
3750 flush_cnt = qeth_prep_flush_pack_buffer(queue);
3751
3752 if (flush_cnt) {
3753 qeth_flush_buffers(queue, index, flush_cnt);
3754 if (q_was_packing)
3755 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_cnt);
3756 }
3757
3758 spin_unlock(&queue->lock);
3759 }
3760 }
3761
3762 static void qeth_qdio_poll(struct ccw_device *cdev, unsigned long card_ptr)
3763 {
3764 struct qeth_card *card = (struct qeth_card *)card_ptr;
3765
3766 napi_schedule_irqoff(&card->napi);
3767 }
3768
3769 int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq)
3770 {
3771 int rc;
3772
3773 if (card->options.cq == QETH_CQ_NOTAVAILABLE) {
3774 rc = -1;
3775 goto out;
3776 } else {
3777 if (card->options.cq == cq) {
3778 rc = 0;
3779 goto out;
3780 }
3781
3782 qeth_free_qdio_queues(card);
3783 card->options.cq = cq;
3784 rc = 0;
3785 }
3786 out:
3787 return rc;
3788
3789 }
3790 EXPORT_SYMBOL_GPL(qeth_configure_cq);
3791
3792 static void qeth_qdio_cq_handler(struct qeth_card *card, unsigned int qdio_err,
3793 unsigned int queue, int first_element,
3794 int count)
3795 {
3796 struct qeth_qdio_q *cq = card->qdio.c_q;
3797 int i;
3798 int rc;
3799
3800 QETH_CARD_TEXT_(card, 5, "qcqhe%d", first_element);
3801 QETH_CARD_TEXT_(card, 5, "qcqhc%d", count);
3802 QETH_CARD_TEXT_(card, 5, "qcqherr%d", qdio_err);
3803
3804 if (qdio_err) {
3805 netif_tx_stop_all_queues(card->dev);
3806 qeth_schedule_recovery(card);
3807 return;
3808 }
3809
3810 for (i = first_element; i < first_element + count; ++i) {
3811 struct qdio_buffer *buffer = cq->qdio_bufs[QDIO_BUFNR(i)];
3812 int e = 0;
3813
3814 while ((e < QDIO_MAX_ELEMENTS_PER_BUFFER) &&
3815 buffer->element[e].addr) {
3816 unsigned long phys_aob_addr = buffer->element[e].addr;
3817
3818 qeth_qdio_handle_aob(card, phys_aob_addr);
3819 ++e;
3820 }
3821 qeth_scrub_qdio_buffer(buffer, QDIO_MAX_ELEMENTS_PER_BUFFER);
3822 }
3823 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, queue,
3824 card->qdio.c_q->next_buf_to_init,
3825 count);
3826 if (rc) {
3827 dev_warn(&card->gdev->dev,
3828 "QDIO reported an error, rc=%i\n", rc);
3829 QETH_CARD_TEXT(card, 2, "qcqherr");
3830 }
3831
3832 cq->next_buf_to_init = QDIO_BUFNR(cq->next_buf_to_init + count);
3833 }
3834
3835 static void qeth_qdio_input_handler(struct ccw_device *ccwdev,
3836 unsigned int qdio_err, int queue,
3837 int first_elem, int count,
3838 unsigned long card_ptr)
3839 {
3840 struct qeth_card *card = (struct qeth_card *)card_ptr;
3841
3842 QETH_CARD_TEXT_(card, 2, "qihq%d", queue);
3843 QETH_CARD_TEXT_(card, 2, "qiec%d", qdio_err);
3844
3845 if (qdio_err)
3846 qeth_schedule_recovery(card);
3847 }
3848
3849 static void qeth_qdio_output_handler(struct ccw_device *ccwdev,
3850 unsigned int qdio_error, int __queue,
3851 int first_element, int count,
3852 unsigned long card_ptr)
3853 {
3854 struct qeth_card *card = (struct qeth_card *) card_ptr;
3855 struct qeth_qdio_out_q *queue = card->qdio.out_qs[__queue];
3856 struct net_device *dev = card->dev;
3857 struct netdev_queue *txq;
3858 int i;
3859
3860 QETH_CARD_TEXT(card, 6, "qdouhdl");
3861 if (qdio_error & QDIO_ERROR_FATAL) {
3862 QETH_CARD_TEXT(card, 2, "achkcond");
3863 netif_tx_stop_all_queues(dev);
3864 qeth_schedule_recovery(card);
3865 return;
3866 }
3867
3868 for (i = first_element; i < (first_element + count); ++i) {
3869 struct qeth_qdio_out_buffer *buf = queue->bufs[QDIO_BUFNR(i)];
3870
3871 qeth_handle_send_error(card, buf, qdio_error);
3872 qeth_clear_output_buffer(queue, buf, qdio_error, 0);
3873 }
3874
3875 atomic_sub(count, &queue->used_buffers);
3876 qeth_check_outbound_queue(queue);
3877
3878 txq = netdev_get_tx_queue(dev, __queue);
3879 /* xmit may have observed the full-condition, but not yet stopped the
3880 * txq. In which case the code below won't trigger. So before returning,
3881 * xmit will re-check the txq's fill level and wake it up if needed.
3882 */
3883 if (netif_tx_queue_stopped(txq) && !qeth_out_queue_is_full(queue))
3884 netif_tx_wake_queue(txq);
3885 }
3886
3887 /**
3888 * Note: Function assumes that we have 4 outbound queues.
3889 */
3890 int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb)
3891 {
3892 struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
3893 u8 tos;
3894
3895 switch (card->qdio.do_prio_queueing) {
3896 case QETH_PRIO_Q_ING_TOS:
3897 case QETH_PRIO_Q_ING_PREC:
3898 switch (qeth_get_ip_version(skb)) {
3899 case 4:
3900 tos = ipv4_get_dsfield(ip_hdr(skb));
3901 break;
3902 case 6:
3903 tos = ipv6_get_dsfield(ipv6_hdr(skb));
3904 break;
3905 default:
3906 return card->qdio.default_out_queue;
3907 }
3908 if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC)
3909 return ~tos >> 6 & 3;
3910 if (tos & IPTOS_MINCOST)
3911 return 3;
3912 if (tos & IPTOS_RELIABILITY)
3913 return 2;
3914 if (tos & IPTOS_THROUGHPUT)
3915 return 1;
3916 if (tos & IPTOS_LOWDELAY)
3917 return 0;
3918 break;
3919 case QETH_PRIO_Q_ING_SKB:
3920 if (skb->priority > 5)
3921 return 0;
3922 return ~skb->priority >> 1 & 3;
3923 case QETH_PRIO_Q_ING_VLAN:
3924 if (veth->h_vlan_proto == htons(ETH_P_8021Q))
3925 return ~ntohs(veth->h_vlan_TCI) >>
3926 (VLAN_PRIO_SHIFT + 1) & 3;
3927 break;
3928 case QETH_PRIO_Q_ING_FIXED:
3929 return card->qdio.default_out_queue;
3930 default:
3931 break;
3932 }
3933 return card->qdio.default_out_queue;
3934 }
3935 EXPORT_SYMBOL_GPL(qeth_get_priority_queue);
3936
3937 /**
3938 * qeth_get_elements_for_frags() - find number of SBALEs for skb frags.
3939 * @skb: SKB address
3940 *
3941 * Returns the number of pages, and thus QDIO buffer elements, needed to cover
3942 * fragmented part of the SKB. Returns zero for linear SKB.
3943 */
3944 static int qeth_get_elements_for_frags(struct sk_buff *skb)
3945 {
3946 int cnt, elements = 0;
3947
3948 for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3949 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
3950
3951 elements += qeth_get_elements_for_range(
3952 (addr_t)skb_frag_address(frag),
3953 (addr_t)skb_frag_address(frag) + skb_frag_size(frag));
3954 }
3955 return elements;
3956 }
3957
3958 /**
3959 * qeth_count_elements() - Counts the number of QDIO buffer elements needed
3960 * to transmit an skb.
3961 * @skb: the skb to operate on.
3962 * @data_offset: skip this part of the skb's linear data
3963 *
3964 * Returns the number of pages, and thus QDIO buffer elements, needed to map the
3965 * skb's data (both its linear part and paged fragments).
3966 */
3967 unsigned int qeth_count_elements(struct sk_buff *skb, unsigned int data_offset)
3968 {
3969 unsigned int elements = qeth_get_elements_for_frags(skb);
3970 addr_t end = (addr_t)skb->data + skb_headlen(skb);
3971 addr_t start = (addr_t)skb->data + data_offset;
3972
3973 if (start != end)
3974 elements += qeth_get_elements_for_range(start, end);
3975 return elements;
3976 }
3977 EXPORT_SYMBOL_GPL(qeth_count_elements);
3978
3979 #define QETH_HDR_CACHE_OBJ_SIZE (sizeof(struct qeth_hdr_tso) + \
3980 MAX_TCP_HEADER)
3981
3982 /**
3983 * qeth_add_hw_header() - add a HW header to an skb.
3984 * @skb: skb that the HW header should be added to.
3985 * @hdr: double pointer to a qeth_hdr. When returning with >= 0,
3986 * it contains a valid pointer to a qeth_hdr.
3987 * @hdr_len: length of the HW header.
3988 * @proto_len: length of protocol headers that need to be in same page as the
3989 * HW header.
3990 *
3991 * Returns the pushed length. If the header can't be pushed on
3992 * (eg. because it would cross a page boundary), it is allocated from
3993 * the cache instead and 0 is returned.
3994 * The number of needed buffer elements is returned in @elements.
3995 * Error to create the hdr is indicated by returning with < 0.
3996 */
3997 static int qeth_add_hw_header(struct qeth_qdio_out_q *queue,
3998 struct sk_buff *skb, struct qeth_hdr **hdr,
3999 unsigned int hdr_len, unsigned int proto_len,
4000 unsigned int *elements)
4001 {
4002 gfp_t gfp = GFP_ATOMIC | (skb_pfmemalloc(skb) ? __GFP_MEMALLOC : 0);
4003 const unsigned int contiguous = proto_len ? proto_len : 1;
4004 const unsigned int max_elements = queue->max_elements;
4005 unsigned int __elements;
4006 addr_t start, end;
4007 bool push_ok;
4008 int rc;
4009
4010 check_layout:
4011 start = (addr_t)skb->data - hdr_len;
4012 end = (addr_t)skb->data;
4013
4014 if (qeth_get_elements_for_range(start, end + contiguous) == 1) {
4015 /* Push HW header into same page as first protocol header. */
4016 push_ok = true;
4017 /* ... but TSO always needs a separate element for headers: */
4018 if (skb_is_gso(skb))
4019 __elements = 1 + qeth_count_elements(skb, proto_len);
4020 else
4021 __elements = qeth_count_elements(skb, 0);
4022 } else if (!proto_len && PAGE_ALIGNED(skb->data)) {
4023 /* Push HW header into preceding page, flush with skb->data. */
4024 push_ok = true;
4025 __elements = 1 + qeth_count_elements(skb, 0);
4026 } else {
4027 /* Use header cache, copy protocol headers up. */
4028 push_ok = false;
4029 __elements = 1 + qeth_count_elements(skb, proto_len);
4030 }
4031
4032 /* Compress skb to fit into one IO buffer: */
4033 if (__elements > max_elements) {
4034 if (!skb_is_nonlinear(skb)) {
4035 /* Drop it, no easy way of shrinking it further. */
4036 QETH_DBF_MESSAGE(2, "Dropped an oversized skb (Max Elements=%u / Actual=%u / Length=%u).\n",
4037 max_elements, __elements, skb->len);
4038 return -E2BIG;
4039 }
4040
4041 rc = skb_linearize(skb);
4042 if (rc) {
4043 QETH_TXQ_STAT_INC(queue, skbs_linearized_fail);
4044 return rc;
4045 }
4046
4047 QETH_TXQ_STAT_INC(queue, skbs_linearized);
4048 /* Linearization changed the layout, re-evaluate: */
4049 goto check_layout;
4050 }
4051
4052 *elements = __elements;
4053 /* Add the header: */
4054 if (push_ok) {
4055 *hdr = skb_push(skb, hdr_len);
4056 return hdr_len;
4057 }
4058
4059 /* Fall back to cache element with known-good alignment: */
4060 if (hdr_len + proto_len > QETH_HDR_CACHE_OBJ_SIZE)
4061 return -E2BIG;
4062 *hdr = kmem_cache_alloc(qeth_core_header_cache, gfp);
4063 if (!*hdr)
4064 return -ENOMEM;
4065 /* Copy protocol headers behind HW header: */
4066 skb_copy_from_linear_data(skb, ((char *)*hdr) + hdr_len, proto_len);
4067 return 0;
4068 }
4069
4070 static bool qeth_iqd_may_bulk(struct qeth_qdio_out_q *queue,
4071 struct sk_buff *curr_skb,
4072 struct qeth_hdr *curr_hdr)
4073 {
4074 struct qeth_qdio_out_buffer *buffer = queue->bufs[queue->bulk_start];
4075 struct qeth_hdr *prev_hdr = queue->prev_hdr;
4076
4077 if (!prev_hdr)
4078 return true;
4079
4080 /* All packets must have the same target: */
4081 if (curr_hdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER2) {
4082 struct sk_buff *prev_skb = skb_peek(&buffer->skb_list);
4083
4084 return ether_addr_equal(eth_hdr(prev_skb)->h_dest,
4085 eth_hdr(curr_skb)->h_dest) &&
4086 qeth_l2_same_vlan(&prev_hdr->hdr.l2, &curr_hdr->hdr.l2);
4087 }
4088
4089 return qeth_l3_same_next_hop(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3) &&
4090 qeth_l3_iqd_same_vlan(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3);
4091 }
4092
4093 /**
4094 * qeth_fill_buffer() - map skb into an output buffer
4095 * @buf: buffer to transport the skb
4096 * @skb: skb to map into the buffer
4097 * @hdr: qeth_hdr for this skb. Either at skb->data, or allocated
4098 * from qeth_core_header_cache.
4099 * @offset: when mapping the skb, start at skb->data + offset
4100 * @hd_len: if > 0, build a dedicated header element of this size
4101 */
4102 static unsigned int qeth_fill_buffer(struct qeth_qdio_out_buffer *buf,
4103 struct sk_buff *skb, struct qeth_hdr *hdr,
4104 unsigned int offset, unsigned int hd_len)
4105 {
4106 struct qdio_buffer *buffer = buf->buffer;
4107 int element = buf->next_element_to_fill;
4108 int length = skb_headlen(skb) - offset;
4109 char *data = skb->data + offset;
4110 unsigned int elem_length, cnt;
4111 bool is_first_elem = true;
4112
4113 __skb_queue_tail(&buf->skb_list, skb);
4114
4115 /* build dedicated element for HW Header */
4116 if (hd_len) {
4117 is_first_elem = false;
4118
4119 buffer->element[element].addr = virt_to_phys(hdr);
4120 buffer->element[element].length = hd_len;
4121 buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
4122
4123 /* HW header is allocated from cache: */
4124 if ((void *)hdr != skb->data)
4125 buf->is_header[element] = 1;
4126 /* HW header was pushed and is contiguous with linear part: */
4127 else if (length > 0 && !PAGE_ALIGNED(data) &&
4128 (data == (char *)hdr + hd_len))
4129 buffer->element[element].eflags |=
4130 SBAL_EFLAGS_CONTIGUOUS;
4131
4132 element++;
4133 }
4134
4135 /* map linear part into buffer element(s) */
4136 while (length > 0) {
4137 elem_length = min_t(unsigned int, length,
4138 PAGE_SIZE - offset_in_page(data));
4139
4140 buffer->element[element].addr = virt_to_phys(data);
4141 buffer->element[element].length = elem_length;
4142 length -= elem_length;
4143 if (is_first_elem) {
4144 is_first_elem = false;
4145 if (length || skb_is_nonlinear(skb))
4146 /* skb needs additional elements */
4147 buffer->element[element].eflags =
4148 SBAL_EFLAGS_FIRST_FRAG;
4149 else
4150 buffer->element[element].eflags = 0;
4151 } else {
4152 buffer->element[element].eflags =
4153 SBAL_EFLAGS_MIDDLE_FRAG;
4154 }
4155
4156 data += elem_length;
4157 element++;
4158 }
4159
4160 /* map page frags into buffer element(s) */
4161 for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
4162 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
4163
4164 data = skb_frag_address(frag);
4165 length = skb_frag_size(frag);
4166 while (length > 0) {
4167 elem_length = min_t(unsigned int, length,
4168 PAGE_SIZE - offset_in_page(data));
4169
4170 buffer->element[element].addr = virt_to_phys(data);
4171 buffer->element[element].length = elem_length;
4172 buffer->element[element].eflags =
4173 SBAL_EFLAGS_MIDDLE_FRAG;
4174
4175 length -= elem_length;
4176 data += elem_length;
4177 element++;
4178 }
4179 }
4180
4181 if (buffer->element[element - 1].eflags)
4182 buffer->element[element - 1].eflags = SBAL_EFLAGS_LAST_FRAG;
4183 buf->next_element_to_fill = element;
4184 return element;
4185 }
4186
4187 static int __qeth_xmit(struct qeth_card *card, struct qeth_qdio_out_q *queue,
4188 struct sk_buff *skb, unsigned int elements,
4189 struct qeth_hdr *hdr, unsigned int offset,
4190 unsigned int hd_len)
4191 {
4192 unsigned int bytes = qdisc_pkt_len(skb);
4193 struct qeth_qdio_out_buffer *buffer;
4194 unsigned int next_element;
4195 struct netdev_queue *txq;
4196 bool stopped = false;
4197 bool flush;
4198
4199 buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start + queue->bulk_count)];
4200 txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
4201
4202 /* Just a sanity check, the wake/stop logic should ensure that we always
4203 * get a free buffer.
4204 */
4205 if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4206 return -EBUSY;
4207
4208 flush = !qeth_iqd_may_bulk(queue, skb, hdr);
4209
4210 if (flush ||
4211 (buffer->next_element_to_fill + elements > queue->max_elements)) {
4212 if (buffer->next_element_to_fill > 0) {
4213 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4214 queue->bulk_count++;
4215 }
4216
4217 if (queue->bulk_count >= queue->bulk_max)
4218 flush = true;
4219
4220 if (flush)
4221 qeth_flush_queue(queue);
4222
4223 buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start +
4224 queue->bulk_count)];
4225
4226 /* Sanity-check again: */
4227 if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4228 return -EBUSY;
4229 }
4230
4231 if (buffer->next_element_to_fill == 0 &&
4232 atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
4233 /* If a TX completion happens right _here_ and misses to wake
4234 * the txq, then our re-check below will catch the race.
4235 */
4236 QETH_TXQ_STAT_INC(queue, stopped);
4237 netif_tx_stop_queue(txq);
4238 stopped = true;
4239 }
4240
4241 next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
4242 buffer->bytes += bytes;
4243 buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
4244 queue->prev_hdr = hdr;
4245
4246 flush = __netdev_tx_sent_queue(txq, bytes,
4247 !stopped && netdev_xmit_more());
4248
4249 if (flush || next_element >= queue->max_elements) {
4250 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4251 queue->bulk_count++;
4252
4253 if (queue->bulk_count >= queue->bulk_max)
4254 flush = true;
4255
4256 if (flush)
4257 qeth_flush_queue(queue);
4258 }
4259
4260 if (stopped && !qeth_out_queue_is_full(queue))
4261 netif_tx_start_queue(txq);
4262 return 0;
4263 }
4264
4265 int qeth_do_send_packet(struct qeth_card *card, struct qeth_qdio_out_q *queue,
4266 struct sk_buff *skb, struct qeth_hdr *hdr,
4267 unsigned int offset, unsigned int hd_len,
4268 int elements_needed)
4269 {
4270 unsigned int start_index = queue->next_buf_to_fill;
4271 struct qeth_qdio_out_buffer *buffer;
4272 unsigned int next_element;
4273 struct netdev_queue *txq;
4274 bool stopped = false;
4275 int flush_count = 0;
4276 int do_pack = 0;
4277 int rc = 0;
4278
4279 buffer = queue->bufs[queue->next_buf_to_fill];
4280
4281 /* Just a sanity check, the wake/stop logic should ensure that we always
4282 * get a free buffer.
4283 */
4284 if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4285 return -EBUSY;
4286
4287 txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
4288
4289 /* check if we need to switch packing state of this queue */
4290 qeth_switch_to_packing_if_needed(queue);
4291 if (queue->do_pack) {
4292 do_pack = 1;
4293 /* does packet fit in current buffer? */
4294 if (buffer->next_element_to_fill + elements_needed >
4295 queue->max_elements) {
4296 /* ... no -> set state PRIMED */
4297 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4298 flush_count++;
4299 queue->next_buf_to_fill =
4300 QDIO_BUFNR(queue->next_buf_to_fill + 1);
4301 buffer = queue->bufs[queue->next_buf_to_fill];
4302
4303 /* We stepped forward, so sanity-check again: */
4304 if (atomic_read(&buffer->state) !=
4305 QETH_QDIO_BUF_EMPTY) {
4306 qeth_flush_buffers(queue, start_index,
4307 flush_count);
4308 rc = -EBUSY;
4309 goto out;
4310 }
4311 }
4312 }
4313
4314 if (buffer->next_element_to_fill == 0 &&
4315 atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
4316 /* If a TX completion happens right _here_ and misses to wake
4317 * the txq, then our re-check below will catch the race.
4318 */
4319 QETH_TXQ_STAT_INC(queue, stopped);
4320 netif_tx_stop_queue(txq);
4321 stopped = true;
4322 }
4323
4324 next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
4325 buffer->bytes += qdisc_pkt_len(skb);
4326 buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
4327
4328 if (queue->do_pack)
4329 QETH_TXQ_STAT_INC(queue, skbs_pack);
4330 if (!queue->do_pack || stopped || next_element >= queue->max_elements) {
4331 flush_count++;
4332 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4333 queue->next_buf_to_fill =
4334 QDIO_BUFNR(queue->next_buf_to_fill + 1);
4335 }
4336
4337 if (flush_count)
4338 qeth_flush_buffers(queue, start_index, flush_count);
4339
4340 out:
4341 if (do_pack)
4342 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_count);
4343
4344 if (stopped && !qeth_out_queue_is_full(queue))
4345 netif_tx_start_queue(txq);
4346 return rc;
4347 }
4348 EXPORT_SYMBOL_GPL(qeth_do_send_packet);
4349
4350 static void qeth_fill_tso_ext(struct qeth_hdr_tso *hdr,
4351 unsigned int payload_len, struct sk_buff *skb,
4352 unsigned int proto_len)
4353 {
4354 struct qeth_hdr_ext_tso *ext = &hdr->ext;
4355
4356 ext->hdr_tot_len = sizeof(*ext);
4357 ext->imb_hdr_no = 1;
4358 ext->hdr_type = 1;
4359 ext->hdr_version = 1;
4360 ext->hdr_len = 28;
4361 ext->payload_len = payload_len;
4362 ext->mss = skb_shinfo(skb)->gso_size;
4363 ext->dg_hdr_len = proto_len;
4364 }
4365
4366 int qeth_xmit(struct qeth_card *card, struct sk_buff *skb,
4367 struct qeth_qdio_out_q *queue, int ipv,
4368 void (*fill_header)(struct qeth_qdio_out_q *queue,
4369 struct qeth_hdr *hdr, struct sk_buff *skb,
4370 int ipv, unsigned int data_len))
4371 {
4372 unsigned int proto_len, hw_hdr_len;
4373 unsigned int frame_len = skb->len;
4374 bool is_tso = skb_is_gso(skb);
4375 unsigned int data_offset = 0;
4376 struct qeth_hdr *hdr = NULL;
4377 unsigned int hd_len = 0;
4378 unsigned int elements;
4379 int push_len, rc;
4380
4381 if (is_tso) {
4382 hw_hdr_len = sizeof(struct qeth_hdr_tso);
4383 proto_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
4384 } else {
4385 hw_hdr_len = sizeof(struct qeth_hdr);
4386 proto_len = (IS_IQD(card) && IS_LAYER2(card)) ? ETH_HLEN : 0;
4387 }
4388
4389 rc = skb_cow_head(skb, hw_hdr_len);
4390 if (rc)
4391 return rc;
4392
4393 push_len = qeth_add_hw_header(queue, skb, &hdr, hw_hdr_len, proto_len,
4394 &elements);
4395 if (push_len < 0)
4396 return push_len;
4397 if (is_tso || !push_len) {
4398 /* HW header needs its own buffer element. */
4399 hd_len = hw_hdr_len + proto_len;
4400 data_offset = push_len + proto_len;
4401 }
4402 memset(hdr, 0, hw_hdr_len);
4403 fill_header(queue, hdr, skb, ipv, frame_len);
4404 if (is_tso)
4405 qeth_fill_tso_ext((struct qeth_hdr_tso *) hdr,
4406 frame_len - proto_len, skb, proto_len);
4407
4408 if (IS_IQD(card)) {
4409 rc = __qeth_xmit(card, queue, skb, elements, hdr, data_offset,
4410 hd_len);
4411 } else {
4412 /* TODO: drop skb_orphan() once TX completion is fast enough */
4413 skb_orphan(skb);
4414 spin_lock(&queue->lock);
4415 rc = qeth_do_send_packet(card, queue, skb, hdr, data_offset,
4416 hd_len, elements);
4417 spin_unlock(&queue->lock);
4418 }
4419
4420 if (rc && !push_len)
4421 kmem_cache_free(qeth_core_header_cache, hdr);
4422
4423 return rc;
4424 }
4425 EXPORT_SYMBOL_GPL(qeth_xmit);
4426
4427 static int qeth_setadp_promisc_mode_cb(struct qeth_card *card,
4428 struct qeth_reply *reply, unsigned long data)
4429 {
4430 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4431 struct qeth_ipacmd_setadpparms *setparms;
4432
4433 QETH_CARD_TEXT(card, 4, "prmadpcb");
4434
4435 setparms = &(cmd->data.setadapterparms);
4436 if (qeth_setadpparms_inspect_rc(cmd)) {
4437 QETH_CARD_TEXT_(card, 4, "prmrc%x", cmd->hdr.return_code);
4438 setparms->data.mode = SET_PROMISC_MODE_OFF;
4439 }
4440 card->info.promisc_mode = setparms->data.mode;
4441 return (cmd->hdr.return_code) ? -EIO : 0;
4442 }
4443
4444 void qeth_setadp_promisc_mode(struct qeth_card *card, bool enable)
4445 {
4446 enum qeth_ipa_promisc_modes mode = enable ? SET_PROMISC_MODE_ON :
4447 SET_PROMISC_MODE_OFF;
4448 struct qeth_cmd_buffer *iob;
4449 struct qeth_ipa_cmd *cmd;
4450
4451 QETH_CARD_TEXT(card, 4, "setprom");
4452 QETH_CARD_TEXT_(card, 4, "mode:%x", mode);
4453
4454 iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE,
4455 SETADP_DATA_SIZEOF(mode));
4456 if (!iob)
4457 return;
4458 cmd = __ipa_cmd(iob);
4459 cmd->data.setadapterparms.data.mode = mode;
4460 qeth_send_ipa_cmd(card, iob, qeth_setadp_promisc_mode_cb, NULL);
4461 }
4462 EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode);
4463
4464 static int qeth_setadpparms_change_macaddr_cb(struct qeth_card *card,
4465 struct qeth_reply *reply, unsigned long data)
4466 {
4467 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4468 struct qeth_ipacmd_setadpparms *adp_cmd;
4469
4470 QETH_CARD_TEXT(card, 4, "chgmaccb");
4471 if (qeth_setadpparms_inspect_rc(cmd))
4472 return -EIO;
4473
4474 adp_cmd = &cmd->data.setadapterparms;
4475 if (!is_valid_ether_addr(adp_cmd->data.change_addr.addr))
4476 return -EADDRNOTAVAIL;
4477
4478 if (IS_LAYER2(card) && IS_OSD(card) && !IS_VM_NIC(card) &&
4479 !(adp_cmd->hdr.flags & QETH_SETADP_FLAGS_VIRTUAL_MAC))
4480 return -EADDRNOTAVAIL;
4481
4482 ether_addr_copy(card->dev->dev_addr, adp_cmd->data.change_addr.addr);
4483 return 0;
4484 }
4485
4486 int qeth_setadpparms_change_macaddr(struct qeth_card *card)
4487 {
4488 int rc;
4489 struct qeth_cmd_buffer *iob;
4490 struct qeth_ipa_cmd *cmd;
4491
4492 QETH_CARD_TEXT(card, 4, "chgmac");
4493
4494 iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS,
4495 SETADP_DATA_SIZEOF(change_addr));
4496 if (!iob)
4497 return -ENOMEM;
4498 cmd = __ipa_cmd(iob);
4499 cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC;
4500 cmd->data.setadapterparms.data.change_addr.addr_size = ETH_ALEN;
4501 ether_addr_copy(cmd->data.setadapterparms.data.change_addr.addr,
4502 card->dev->dev_addr);
4503 rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_change_macaddr_cb,
4504 NULL);
4505 return rc;
4506 }
4507 EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr);
4508
4509 static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card,
4510 struct qeth_reply *reply, unsigned long data)
4511 {
4512 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4513 struct qeth_set_access_ctrl *access_ctrl_req;
4514
4515 QETH_CARD_TEXT(card, 4, "setaccb");
4516
4517 access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4518 QETH_CARD_TEXT_(card, 2, "rc=%d",
4519 cmd->data.setadapterparms.hdr.return_code);
4520 if (cmd->data.setadapterparms.hdr.return_code !=
4521 SET_ACCESS_CTRL_RC_SUCCESS)
4522 QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%#x) on device %x: %#x\n",
4523 access_ctrl_req->subcmd_code, CARD_DEVID(card),
4524 cmd->data.setadapterparms.hdr.return_code);
4525 switch (qeth_setadpparms_inspect_rc(cmd)) {
4526 case SET_ACCESS_CTRL_RC_SUCCESS:
4527 if (access_ctrl_req->subcmd_code == ISOLATION_MODE_NONE)
4528 dev_info(&card->gdev->dev,
4529 "QDIO data connection isolation is deactivated\n");
4530 else
4531 dev_info(&card->gdev->dev,
4532 "QDIO data connection isolation is activated\n");
4533 return 0;
4534 case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
4535 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already deactivated\n",
4536 CARD_DEVID(card));
4537 return 0;
4538 case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
4539 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already activated\n",
4540 CARD_DEVID(card));
4541 return 0;
4542 case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
4543 dev_err(&card->gdev->dev, "Adapter does not "
4544 "support QDIO data connection isolation\n");
4545 return -EOPNOTSUPP;
4546 case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
4547 dev_err(&card->gdev->dev,
4548 "Adapter is dedicated. "
4549 "QDIO data connection isolation not supported\n");
4550 return -EOPNOTSUPP;
4551 case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
4552 dev_err(&card->gdev->dev,
4553 "TSO does not permit QDIO data connection isolation\n");
4554 return -EPERM;
4555 case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED:
4556 dev_err(&card->gdev->dev, "The adjacent switch port does not "
4557 "support reflective relay mode\n");
4558 return -EOPNOTSUPP;
4559 case SET_ACCESS_CTRL_RC_REFLREL_FAILED:
4560 dev_err(&card->gdev->dev, "The reflective relay mode cannot be "
4561 "enabled at the adjacent switch port");
4562 return -EREMOTEIO;
4563 case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED:
4564 dev_warn(&card->gdev->dev, "Turning off reflective relay mode "
4565 "at the adjacent switch failed\n");
4566 /* benign error while disabling ISOLATION_MODE_FWD */
4567 return 0;
4568 default:
4569 return -EIO;
4570 }
4571 }
4572
4573 int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
4574 enum qeth_ipa_isolation_modes mode)
4575 {
4576 int rc;
4577 struct qeth_cmd_buffer *iob;
4578 struct qeth_ipa_cmd *cmd;
4579 struct qeth_set_access_ctrl *access_ctrl_req;
4580
4581 QETH_CARD_TEXT(card, 4, "setacctl");
4582
4583 if (!qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
4584 dev_err(&card->gdev->dev,
4585 "Adapter does not support QDIO data connection isolation\n");
4586 return -EOPNOTSUPP;
4587 }
4588
4589 iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
4590 SETADP_DATA_SIZEOF(set_access_ctrl));
4591 if (!iob)
4592 return -ENOMEM;
4593 cmd = __ipa_cmd(iob);
4594 access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4595 access_ctrl_req->subcmd_code = mode;
4596
4597 rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb,
4598 NULL);
4599 if (rc) {
4600 QETH_CARD_TEXT_(card, 2, "rc=%d", rc);
4601 QETH_DBF_MESSAGE(3, "IPA(SET_ACCESS_CTRL(%d) on device %x: sent failed\n",
4602 rc, CARD_DEVID(card));
4603 }
4604
4605 return rc;
4606 }
4607
4608 void qeth_tx_timeout(struct net_device *dev, unsigned int txqueue)
4609 {
4610 struct qeth_card *card;
4611
4612 card = dev->ml_priv;
4613 QETH_CARD_TEXT(card, 4, "txtimeo");
4614 qeth_schedule_recovery(card);
4615 }
4616 EXPORT_SYMBOL_GPL(qeth_tx_timeout);
4617
4618 static int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum)
4619 {
4620 struct qeth_card *card = dev->ml_priv;
4621 int rc = 0;
4622
4623 switch (regnum) {
4624 case MII_BMCR: /* Basic mode control register */
4625 rc = BMCR_FULLDPLX;
4626 if ((card->info.link_type != QETH_LINK_TYPE_GBIT_ETH) &&
4627 (card->info.link_type != QETH_LINK_TYPE_OSN) &&
4628 (card->info.link_type != QETH_LINK_TYPE_10GBIT_ETH) &&
4629 (card->info.link_type != QETH_LINK_TYPE_25GBIT_ETH))
4630 rc |= BMCR_SPEED100;
4631 break;
4632 case MII_BMSR: /* Basic mode status register */
4633 rc = BMSR_ERCAP | BMSR_ANEGCOMPLETE | BMSR_LSTATUS |
4634 BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL |
4635 BMSR_100BASE4;
4636 break;
4637 case MII_PHYSID1: /* PHYS ID 1 */
4638 rc = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 8) |
4639 dev->dev_addr[2];
4640 rc = (rc >> 5) & 0xFFFF;
4641 break;
4642 case MII_PHYSID2: /* PHYS ID 2 */
4643 rc = (dev->dev_addr[2] << 10) & 0xFFFF;
4644 break;
4645 case MII_ADVERTISE: /* Advertisement control reg */
4646 rc = ADVERTISE_ALL;
4647 break;
4648 case MII_LPA: /* Link partner ability reg */
4649 rc = LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL |
4650 LPA_100BASE4 | LPA_LPACK;
4651 break;
4652 case MII_EXPANSION: /* Expansion register */
4653 break;
4654 case MII_DCOUNTER: /* disconnect counter */
4655 break;
4656 case MII_FCSCOUNTER: /* false carrier counter */
4657 break;
4658 case MII_NWAYTEST: /* N-way auto-neg test register */
4659 break;
4660 case MII_RERRCOUNTER: /* rx error counter */
4661 rc = card->stats.rx_length_errors +
4662 card->stats.rx_frame_errors +
4663 card->stats.rx_fifo_errors;
4664 break;
4665 case MII_SREVISION: /* silicon revision */
4666 break;
4667 case MII_RESV1: /* reserved 1 */
4668 break;
4669 case MII_LBRERROR: /* loopback, rx, bypass error */
4670 break;
4671 case MII_PHYADDR: /* physical address */
4672 break;
4673 case MII_RESV2: /* reserved 2 */
4674 break;
4675 case MII_TPISTATUS: /* TPI status for 10mbps */
4676 break;
4677 case MII_NCONFIG: /* network interface config */
4678 break;
4679 default:
4680 break;
4681 }
4682 return rc;
4683 }
4684
4685 static int qeth_snmp_command_cb(struct qeth_card *card,
4686 struct qeth_reply *reply, unsigned long data)
4687 {
4688 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4689 struct qeth_arp_query_info *qinfo = reply->param;
4690 struct qeth_ipacmd_setadpparms *adp_cmd;
4691 unsigned int data_len;
4692 void *snmp_data;
4693
4694 QETH_CARD_TEXT(card, 3, "snpcmdcb");
4695
4696 if (cmd->hdr.return_code) {
4697 QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code);
4698 return -EIO;
4699 }
4700 if (cmd->data.setadapterparms.hdr.return_code) {
4701 cmd->hdr.return_code =
4702 cmd->data.setadapterparms.hdr.return_code;
4703 QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code);
4704 return -EIO;
4705 }
4706
4707 adp_cmd = &cmd->data.setadapterparms;
4708 data_len = adp_cmd->hdr.cmdlength - sizeof(adp_cmd->hdr);
4709 if (adp_cmd->hdr.seq_no == 1) {
4710 snmp_data = &adp_cmd->data.snmp;
4711 } else {
4712 snmp_data = &adp_cmd->data.snmp.request;
4713 data_len -= offsetof(struct qeth_snmp_cmd, request);
4714 }
4715
4716 /* check if there is enough room in userspace */
4717 if ((qinfo->udata_len - qinfo->udata_offset) < data_len) {
4718 QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOSPC);
4719 return -ENOSPC;
4720 }
4721 QETH_CARD_TEXT_(card, 4, "snore%i",
4722 cmd->data.setadapterparms.hdr.used_total);
4723 QETH_CARD_TEXT_(card, 4, "sseqn%i",
4724 cmd->data.setadapterparms.hdr.seq_no);
4725 /*copy entries to user buffer*/
4726 memcpy(qinfo->udata + qinfo->udata_offset, snmp_data, data_len);
4727 qinfo->udata_offset += data_len;
4728
4729 if (cmd->data.setadapterparms.hdr.seq_no <
4730 cmd->data.setadapterparms.hdr.used_total)
4731 return 1;
4732 return 0;
4733 }
4734
4735 static int qeth_snmp_command(struct qeth_card *card, char __user *udata)
4736 {
4737 struct qeth_snmp_ureq __user *ureq;
4738 struct qeth_cmd_buffer *iob;
4739 unsigned int req_len;
4740 struct qeth_arp_query_info qinfo = {0, };
4741 int rc = 0;
4742
4743 QETH_CARD_TEXT(card, 3, "snmpcmd");
4744
4745 if (IS_VM_NIC(card))
4746 return -EOPNOTSUPP;
4747
4748 if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) &&
4749 IS_LAYER3(card))
4750 return -EOPNOTSUPP;
4751
4752 ureq = (struct qeth_snmp_ureq __user *) udata;
4753 if (get_user(qinfo.udata_len, &ureq->hdr.data_len) ||
4754 get_user(req_len, &ureq->hdr.req_len))
4755 return -EFAULT;
4756
4757 /* Sanitize user input, to avoid overflows in iob size calculation: */
4758 if (req_len > QETH_BUFSIZE)
4759 return -EINVAL;
4760
4761 iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL, req_len);
4762 if (!iob)
4763 return -ENOMEM;
4764
4765 if (copy_from_user(&__ipa_cmd(iob)->data.setadapterparms.data.snmp,
4766 &ureq->cmd, req_len)) {
4767 qeth_put_cmd(iob);
4768 return -EFAULT;
4769 }
4770
4771 qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
4772 if (!qinfo.udata) {
4773 qeth_put_cmd(iob);
4774 return -ENOMEM;
4775 }
4776 qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr);
4777
4778 rc = qeth_send_ipa_cmd(card, iob, qeth_snmp_command_cb, &qinfo);
4779 if (rc)
4780 QETH_DBF_MESSAGE(2, "SNMP command failed on device %x: (%#x)\n",
4781 CARD_DEVID(card), rc);
4782 else {
4783 if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
4784 rc = -EFAULT;
4785 }
4786
4787 kfree(qinfo.udata);
4788 return rc;
4789 }
4790
4791 static int qeth_setadpparms_query_oat_cb(struct qeth_card *card,
4792 struct qeth_reply *reply,
4793 unsigned long data)
4794 {
4795 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4796 struct qeth_qoat_priv *priv = reply->param;
4797 int resdatalen;
4798
4799 QETH_CARD_TEXT(card, 3, "qoatcb");
4800 if (qeth_setadpparms_inspect_rc(cmd))
4801 return -EIO;
4802
4803 resdatalen = cmd->data.setadapterparms.hdr.cmdlength;
4804
4805 if (resdatalen > (priv->buffer_len - priv->response_len))
4806 return -ENOSPC;
4807
4808 memcpy(priv->buffer + priv->response_len,
4809 &cmd->data.setadapterparms.hdr, resdatalen);
4810 priv->response_len += resdatalen;
4811
4812 if (cmd->data.setadapterparms.hdr.seq_no <
4813 cmd->data.setadapterparms.hdr.used_total)
4814 return 1;
4815 return 0;
4816 }
4817
4818 static int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
4819 {
4820 int rc = 0;
4821 struct qeth_cmd_buffer *iob;
4822 struct qeth_ipa_cmd *cmd;
4823 struct qeth_query_oat *oat_req;
4824 struct qeth_query_oat_data oat_data;
4825 struct qeth_qoat_priv priv;
4826 void __user *tmp;
4827
4828 QETH_CARD_TEXT(card, 3, "qoatcmd");
4829
4830 if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT))
4831 return -EOPNOTSUPP;
4832
4833 if (copy_from_user(&oat_data, udata, sizeof(oat_data)))
4834 return -EFAULT;
4835
4836 priv.buffer_len = oat_data.buffer_len;
4837 priv.response_len = 0;
4838 priv.buffer = vzalloc(oat_data.buffer_len);
4839 if (!priv.buffer)
4840 return -ENOMEM;
4841
4842 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4843 SETADP_DATA_SIZEOF(query_oat));
4844 if (!iob) {
4845 rc = -ENOMEM;
4846 goto out_free;
4847 }
4848 cmd = __ipa_cmd(iob);
4849 oat_req = &cmd->data.setadapterparms.data.query_oat;
4850 oat_req->subcmd_code = oat_data.command;
4851
4852 rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb, &priv);
4853 if (!rc) {
4854 tmp = is_compat_task() ? compat_ptr(oat_data.ptr) :
4855 u64_to_user_ptr(oat_data.ptr);
4856 oat_data.response_len = priv.response_len;
4857
4858 if (copy_to_user(tmp, priv.buffer, priv.response_len) ||
4859 copy_to_user(udata, &oat_data, sizeof(oat_data)))
4860 rc = -EFAULT;
4861 }
4862
4863 out_free:
4864 vfree(priv.buffer);
4865 return rc;
4866 }
4867
4868 static int qeth_query_card_info_cb(struct qeth_card *card,
4869 struct qeth_reply *reply, unsigned long data)
4870 {
4871 struct carrier_info *carrier_info = (struct carrier_info *)reply->param;
4872 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4873 struct qeth_query_card_info *card_info;
4874
4875 QETH_CARD_TEXT(card, 2, "qcrdincb");
4876 if (qeth_setadpparms_inspect_rc(cmd))
4877 return -EIO;
4878
4879 card_info = &cmd->data.setadapterparms.data.card_info;
4880 carrier_info->card_type = card_info->card_type;
4881 carrier_info->port_mode = card_info->port_mode;
4882 carrier_info->port_speed = card_info->port_speed;
4883 return 0;
4884 }
4885
4886 int qeth_query_card_info(struct qeth_card *card,
4887 struct carrier_info *carrier_info)
4888 {
4889 struct qeth_cmd_buffer *iob;
4890
4891 QETH_CARD_TEXT(card, 2, "qcrdinfo");
4892 if (!qeth_adp_supported(card, IPA_SETADP_QUERY_CARD_INFO))
4893 return -EOPNOTSUPP;
4894 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_CARD_INFO, 0);
4895 if (!iob)
4896 return -ENOMEM;
4897 return qeth_send_ipa_cmd(card, iob, qeth_query_card_info_cb,
4898 (void *)carrier_info);
4899 }
4900
4901 /**
4902 * qeth_vm_request_mac() - Request a hypervisor-managed MAC address
4903 * @card: pointer to a qeth_card
4904 *
4905 * Returns
4906 * 0, if a MAC address has been set for the card's netdevice
4907 * a return code, for various error conditions
4908 */
4909 int qeth_vm_request_mac(struct qeth_card *card)
4910 {
4911 struct diag26c_mac_resp *response;
4912 struct diag26c_mac_req *request;
4913 int rc;
4914
4915 QETH_CARD_TEXT(card, 2, "vmreqmac");
4916
4917 request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
4918 response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
4919 if (!request || !response) {
4920 rc = -ENOMEM;
4921 goto out;
4922 }
4923
4924 request->resp_buf_len = sizeof(*response);
4925 request->resp_version = DIAG26C_VERSION2;
4926 request->op_code = DIAG26C_GET_MAC;
4927 request->devno = card->info.ddev_devno;
4928
4929 QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4930 rc = diag26c(request, response, DIAG26C_MAC_SERVICES);
4931 QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4932 if (rc)
4933 goto out;
4934 QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
4935
4936 if (request->resp_buf_len < sizeof(*response) ||
4937 response->version != request->resp_version) {
4938 rc = -EIO;
4939 QETH_CARD_TEXT(card, 2, "badresp");
4940 QETH_CARD_HEX(card, 2, &request->resp_buf_len,
4941 sizeof(request->resp_buf_len));
4942 } else if (!is_valid_ether_addr(response->mac)) {
4943 rc = -EINVAL;
4944 QETH_CARD_TEXT(card, 2, "badmac");
4945 QETH_CARD_HEX(card, 2, response->mac, ETH_ALEN);
4946 } else {
4947 ether_addr_copy(card->dev->dev_addr, response->mac);
4948 }
4949
4950 out:
4951 kfree(response);
4952 kfree(request);
4953 return rc;
4954 }
4955 EXPORT_SYMBOL_GPL(qeth_vm_request_mac);
4956
4957 static void qeth_determine_capabilities(struct qeth_card *card)
4958 {
4959 struct qeth_channel *channel = &card->data;
4960 struct ccw_device *ddev = channel->ccwdev;
4961 int rc;
4962 int ddev_offline = 0;
4963
4964 QETH_CARD_TEXT(card, 2, "detcapab");
4965 if (!ddev->online) {
4966 ddev_offline = 1;
4967 rc = qeth_start_channel(channel);
4968 if (rc) {
4969 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
4970 goto out;
4971 }
4972 }
4973
4974 rc = qeth_read_conf_data(card);
4975 if (rc) {
4976 QETH_DBF_MESSAGE(2, "qeth_read_conf_data on device %x returned %i\n",
4977 CARD_DEVID(card), rc);
4978 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
4979 goto out_offline;
4980 }
4981
4982 rc = qdio_get_ssqd_desc(ddev, &card->ssqd);
4983 if (rc)
4984 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
4985
4986 QETH_CARD_TEXT_(card, 2, "qfmt%d", card->ssqd.qfmt);
4987 QETH_CARD_TEXT_(card, 2, "ac1:%02x", card->ssqd.qdioac1);
4988 QETH_CARD_TEXT_(card, 2, "ac2:%04x", card->ssqd.qdioac2);
4989 QETH_CARD_TEXT_(card, 2, "ac3:%04x", card->ssqd.qdioac3);
4990 QETH_CARD_TEXT_(card, 2, "icnt%d", card->ssqd.icnt);
4991 if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) ||
4992 ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) ||
4993 ((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) {
4994 dev_info(&card->gdev->dev,
4995 "Completion Queueing supported\n");
4996 } else {
4997 card->options.cq = QETH_CQ_NOTAVAILABLE;
4998 }
4999
5000 out_offline:
5001 if (ddev_offline == 1)
5002 qeth_stop_channel(channel);
5003 out:
5004 return;
5005 }
5006
5007 static void qeth_read_ccw_conf_data(struct qeth_card *card)
5008 {
5009 struct qeth_card_info *info = &card->info;
5010 struct ccw_device *cdev = CARD_DDEV(card);
5011 struct ccw_dev_id dev_id;
5012
5013 QETH_CARD_TEXT(card, 2, "ccwconfd");
5014 ccw_device_get_id(cdev, &dev_id);
5015
5016 info->ddev_devno = dev_id.devno;
5017 info->ids_valid = !ccw_device_get_cssid(cdev, &info->cssid) &&
5018 !ccw_device_get_iid(cdev, &info->iid) &&
5019 !ccw_device_get_chid(cdev, 0, &info->chid);
5020 info->ssid = dev_id.ssid;
5021
5022 dev_info(&card->gdev->dev, "CHID: %x CHPID: %x\n",
5023 info->chid, info->chpid);
5024
5025 QETH_CARD_TEXT_(card, 3, "devn%x", info->ddev_devno);
5026 QETH_CARD_TEXT_(card, 3, "cssid:%x", info->cssid);
5027 QETH_CARD_TEXT_(card, 3, "iid:%x", info->iid);
5028 QETH_CARD_TEXT_(card, 3, "ssid:%x", info->ssid);
5029 QETH_CARD_TEXT_(card, 3, "chpid:%x", info->chpid);
5030 QETH_CARD_TEXT_(card, 3, "chid:%x", info->chid);
5031 QETH_CARD_TEXT_(card, 3, "idval%x", info->ids_valid);
5032 }
5033
5034 static int qeth_qdio_establish(struct qeth_card *card)
5035 {
5036 struct qdio_buffer **out_sbal_ptrs[QETH_MAX_OUT_QUEUES];
5037 struct qdio_buffer **in_sbal_ptrs[QETH_MAX_IN_QUEUES];
5038 struct qeth_qib_parms *qib_parms = NULL;
5039 struct qdio_initialize init_data;
5040 unsigned int i;
5041 int rc = 0;
5042
5043 QETH_CARD_TEXT(card, 2, "qdioest");
5044
5045 if (!IS_IQD(card) && !IS_VM_NIC(card)) {
5046 qib_parms = kzalloc(sizeof_field(struct qib, parm), GFP_KERNEL);
5047 if (!qib_parms)
5048 return -ENOMEM;
5049
5050 qeth_fill_qib_parms(card, qib_parms);
5051 }
5052
5053 in_sbal_ptrs[0] = card->qdio.in_q->qdio_bufs;
5054 if (card->options.cq == QETH_CQ_ENABLED)
5055 in_sbal_ptrs[1] = card->qdio.c_q->qdio_bufs;
5056
5057 for (i = 0; i < card->qdio.no_out_queues; i++)
5058 out_sbal_ptrs[i] = card->qdio.out_qs[i]->qdio_bufs;
5059
5060 memset(&init_data, 0, sizeof(struct qdio_initialize));
5061 init_data.q_format = IS_IQD(card) ? QDIO_IQDIO_QFMT :
5062 QDIO_QETH_QFMT;
5063 init_data.qib_param_field_format = 0;
5064 init_data.qib_param_field = (void *)qib_parms;
5065 init_data.no_input_qs = card->qdio.no_in_queues;
5066 init_data.no_output_qs = card->qdio.no_out_queues;
5067 init_data.input_handler = qeth_qdio_input_handler;
5068 init_data.output_handler = qeth_qdio_output_handler;
5069 init_data.irq_poll = qeth_qdio_poll;
5070 init_data.int_parm = (unsigned long) card;
5071 init_data.input_sbal_addr_array = in_sbal_ptrs;
5072 init_data.output_sbal_addr_array = out_sbal_ptrs;
5073 init_data.output_sbal_state_array = card->qdio.out_bufstates;
5074 init_data.scan_threshold = IS_IQD(card) ? 0 : 32;
5075
5076 if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED,
5077 QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) {
5078 rc = qdio_allocate(CARD_DDEV(card), init_data.no_input_qs,
5079 init_data.no_output_qs);
5080 if (rc) {
5081 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5082 goto out;
5083 }
5084 rc = qdio_establish(CARD_DDEV(card), &init_data);
5085 if (rc) {
5086 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5087 qdio_free(CARD_DDEV(card));
5088 }
5089 }
5090
5091 switch (card->options.cq) {
5092 case QETH_CQ_ENABLED:
5093 dev_info(&card->gdev->dev, "Completion Queue support enabled");
5094 break;
5095 case QETH_CQ_DISABLED:
5096 dev_info(&card->gdev->dev, "Completion Queue support disabled");
5097 break;
5098 default:
5099 break;
5100 }
5101
5102 out:
5103 kfree(qib_parms);
5104 return rc;
5105 }
5106
5107 static void qeth_core_free_card(struct qeth_card *card)
5108 {
5109 QETH_CARD_TEXT(card, 2, "freecrd");
5110
5111 unregister_service_level(&card->qeth_service_level);
5112 debugfs_remove_recursive(card->debugfs);
5113 qeth_put_cmd(card->read_cmd);
5114 destroy_workqueue(card->event_wq);
5115 dev_set_drvdata(&card->gdev->dev, NULL);
5116 kfree(card);
5117 }
5118
5119 static void qeth_trace_features(struct qeth_card *card)
5120 {
5121 QETH_CARD_TEXT(card, 2, "features");
5122 QETH_CARD_HEX(card, 2, &card->options.ipa4, sizeof(card->options.ipa4));
5123 QETH_CARD_HEX(card, 2, &card->options.ipa6, sizeof(card->options.ipa6));
5124 QETH_CARD_HEX(card, 2, &card->options.adp, sizeof(card->options.adp));
5125 QETH_CARD_HEX(card, 2, &card->info.diagass_support,
5126 sizeof(card->info.diagass_support));
5127 }
5128
5129 static struct ccw_device_id qeth_ids[] = {
5130 {CCW_DEVICE_DEVTYPE(0x1731, 0x01, 0x1732, 0x01),
5131 .driver_info = QETH_CARD_TYPE_OSD},
5132 {CCW_DEVICE_DEVTYPE(0x1731, 0x05, 0x1732, 0x05),
5133 .driver_info = QETH_CARD_TYPE_IQD},
5134 #ifdef CONFIG_QETH_OSN
5135 {CCW_DEVICE_DEVTYPE(0x1731, 0x06, 0x1732, 0x06),
5136 .driver_info = QETH_CARD_TYPE_OSN},
5137 #endif
5138 {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x03),
5139 .driver_info = QETH_CARD_TYPE_OSM},
5140 #ifdef CONFIG_QETH_OSX
5141 {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02),
5142 .driver_info = QETH_CARD_TYPE_OSX},
5143 #endif
5144 {},
5145 };
5146 MODULE_DEVICE_TABLE(ccw, qeth_ids);
5147
5148 static struct ccw_driver qeth_ccw_driver = {
5149 .driver = {
5150 .owner = THIS_MODULE,
5151 .name = "qeth",
5152 },
5153 .ids = qeth_ids,
5154 .probe = ccwgroup_probe_ccwdev,
5155 .remove = ccwgroup_remove_ccwdev,
5156 };
5157
5158 static int qeth_hardsetup_card(struct qeth_card *card, bool *carrier_ok)
5159 {
5160 int retries = 3;
5161 int rc;
5162
5163 QETH_CARD_TEXT(card, 2, "hrdsetup");
5164 atomic_set(&card->force_alloc_skb, 0);
5165 rc = qeth_update_from_chp_desc(card);
5166 if (rc)
5167 return rc;
5168 retry:
5169 if (retries < 3)
5170 QETH_DBF_MESSAGE(2, "Retrying to do IDX activates on device %x.\n",
5171 CARD_DEVID(card));
5172 rc = qeth_qdio_clear_card(card, !IS_IQD(card));
5173 qeth_stop_channel(&card->data);
5174 qeth_stop_channel(&card->write);
5175 qeth_stop_channel(&card->read);
5176 qdio_free(CARD_DDEV(card));
5177
5178 rc = qeth_start_channel(&card->read);
5179 if (rc)
5180 goto retriable;
5181 rc = qeth_start_channel(&card->write);
5182 if (rc)
5183 goto retriable;
5184 rc = qeth_start_channel(&card->data);
5185 if (rc)
5186 goto retriable;
5187 retriable:
5188 if (rc == -ERESTARTSYS) {
5189 QETH_CARD_TEXT(card, 2, "break1");
5190 return rc;
5191 } else if (rc) {
5192 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
5193 if (--retries < 0)
5194 goto out;
5195 else
5196 goto retry;
5197 }
5198
5199 qeth_determine_capabilities(card);
5200 qeth_read_ccw_conf_data(card);
5201 qeth_idx_init(card);
5202
5203 rc = qeth_idx_activate_read_channel(card);
5204 if (rc == -EINTR) {
5205 QETH_CARD_TEXT(card, 2, "break2");
5206 return rc;
5207 } else if (rc) {
5208 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
5209 if (--retries < 0)
5210 goto out;
5211 else
5212 goto retry;
5213 }
5214
5215 rc = qeth_idx_activate_write_channel(card);
5216 if (rc == -EINTR) {
5217 QETH_CARD_TEXT(card, 2, "break3");
5218 return rc;
5219 } else if (rc) {
5220 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
5221 if (--retries < 0)
5222 goto out;
5223 else
5224 goto retry;
5225 }
5226 card->read_or_write_problem = 0;
5227 rc = qeth_mpc_initialize(card);
5228 if (rc) {
5229 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
5230 goto out;
5231 }
5232
5233 rc = qeth_send_startlan(card);
5234 if (rc) {
5235 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
5236 if (rc == -ENETDOWN) {
5237 dev_warn(&card->gdev->dev, "The LAN is offline\n");
5238 *carrier_ok = false;
5239 } else {
5240 goto out;
5241 }
5242 } else {
5243 *carrier_ok = true;
5244 }
5245
5246 card->options.ipa4.supported = 0;
5247 card->options.ipa6.supported = 0;
5248 card->options.adp.supported = 0;
5249 card->options.sbp.supported_funcs = 0;
5250 card->info.diagass_support = 0;
5251 rc = qeth_query_ipassists(card, QETH_PROT_IPV4);
5252 if (rc == -ENOMEM)
5253 goto out;
5254 if (qeth_is_supported(card, IPA_IPV6)) {
5255 rc = qeth_query_ipassists(card, QETH_PROT_IPV6);
5256 if (rc == -ENOMEM)
5257 goto out;
5258 }
5259 if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
5260 rc = qeth_query_setadapterparms(card);
5261 if (rc < 0) {
5262 QETH_CARD_TEXT_(card, 2, "7err%d", rc);
5263 goto out;
5264 }
5265 }
5266 if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
5267 rc = qeth_query_setdiagass(card);
5268 if (rc)
5269 QETH_CARD_TEXT_(card, 2, "8err%d", rc);
5270 }
5271
5272 qeth_trace_features(card);
5273
5274 if (!qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP) ||
5275 (card->info.hwtrap && qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM)))
5276 card->info.hwtrap = 0;
5277
5278 if (card->options.isolation != ISOLATION_MODE_NONE) {
5279 rc = qeth_setadpparms_set_access_ctrl(card,
5280 card->options.isolation);
5281 if (rc)
5282 goto out;
5283 }
5284
5285 rc = qeth_init_qdio_queues(card);
5286 if (rc) {
5287 QETH_CARD_TEXT_(card, 2, "9err%d", rc);
5288 goto out;
5289 }
5290
5291 return 0;
5292 out:
5293 dev_warn(&card->gdev->dev, "The qeth device driver failed to recover "
5294 "an error on the device\n");
5295 QETH_DBF_MESSAGE(2, "Initialization for device %x failed in hardsetup! rc=%d\n",
5296 CARD_DEVID(card), rc);
5297 return rc;
5298 }
5299
5300 static int qeth_set_online(struct qeth_card *card)
5301 {
5302 bool carrier_ok;
5303 int rc;
5304
5305 mutex_lock(&card->discipline_mutex);
5306 mutex_lock(&card->conf_mutex);
5307 QETH_CARD_TEXT(card, 2, "setonlin");
5308
5309 rc = qeth_hardsetup_card(card, &carrier_ok);
5310 if (rc) {
5311 QETH_CARD_TEXT_(card, 2, "2err%04x", rc);
5312 rc = -ENODEV;
5313 goto err_hardsetup;
5314 }
5315
5316 qeth_print_status_message(card);
5317
5318 if (card->dev->reg_state != NETREG_REGISTERED)
5319 /* no need for locking / error handling at this early stage: */
5320 qeth_set_real_num_tx_queues(card, qeth_tx_actual_queues(card));
5321
5322 rc = card->discipline->set_online(card, carrier_ok);
5323 if (rc)
5324 goto err_online;
5325
5326 /* let user_space know that device is online */
5327 kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE);
5328
5329 mutex_unlock(&card->conf_mutex);
5330 mutex_unlock(&card->discipline_mutex);
5331 return 0;
5332
5333 err_online:
5334 err_hardsetup:
5335 qeth_qdio_clear_card(card, 0);
5336 qeth_clear_working_pool_list(card);
5337 qeth_flush_local_addrs(card);
5338
5339 qeth_stop_channel(&card->data);
5340 qeth_stop_channel(&card->write);
5341 qeth_stop_channel(&card->read);
5342 qdio_free(CARD_DDEV(card));
5343
5344 mutex_unlock(&card->conf_mutex);
5345 mutex_unlock(&card->discipline_mutex);
5346 return rc;
5347 }
5348
5349 int qeth_set_offline(struct qeth_card *card, bool resetting)
5350 {
5351 int rc, rc2, rc3;
5352
5353 mutex_lock(&card->discipline_mutex);
5354 mutex_lock(&card->conf_mutex);
5355 QETH_CARD_TEXT(card, 3, "setoffl");
5356
5357 if ((!resetting && card->info.hwtrap) || card->info.hwtrap == 2) {
5358 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
5359 card->info.hwtrap = 1;
5360 }
5361
5362 /* cancel any stalled cmd that might block the rtnl: */
5363 qeth_clear_ipacmd_list(card);
5364
5365 rtnl_lock();
5366 card->info.open_when_online = card->dev->flags & IFF_UP;
5367 dev_close(card->dev);
5368 netif_device_detach(card->dev);
5369 netif_carrier_off(card->dev);
5370 rtnl_unlock();
5371
5372 cancel_work_sync(&card->rx_mode_work);
5373
5374 card->discipline->set_offline(card);
5375
5376 qeth_qdio_clear_card(card, 0);
5377 qeth_drain_output_queues(card);
5378 qeth_clear_working_pool_list(card);
5379 qeth_flush_local_addrs(card);
5380 card->info.promisc_mode = 0;
5381
5382 rc = qeth_stop_channel(&card->data);
5383 rc2 = qeth_stop_channel(&card->write);
5384 rc3 = qeth_stop_channel(&card->read);
5385 if (!rc)
5386 rc = (rc2) ? rc2 : rc3;
5387 if (rc)
5388 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
5389 qdio_free(CARD_DDEV(card));
5390
5391 /* let user_space know that device is offline */
5392 kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE);
5393
5394 mutex_unlock(&card->conf_mutex);
5395 mutex_unlock(&card->discipline_mutex);
5396 return 0;
5397 }
5398 EXPORT_SYMBOL_GPL(qeth_set_offline);
5399
5400 static int qeth_do_reset(void *data)
5401 {
5402 struct qeth_card *card = data;
5403 int rc;
5404
5405 QETH_CARD_TEXT(card, 2, "recover1");
5406 if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
5407 return 0;
5408 QETH_CARD_TEXT(card, 2, "recover2");
5409 dev_warn(&card->gdev->dev,
5410 "A recovery process has been started for the device\n");
5411
5412 qeth_set_offline(card, true);
5413 rc = qeth_set_online(card);
5414 if (!rc) {
5415 dev_info(&card->gdev->dev,
5416 "Device successfully recovered!\n");
5417 } else {
5418 ccwgroup_set_offline(card->gdev);
5419 dev_warn(&card->gdev->dev,
5420 "The qeth device driver failed to recover an error on the device\n");
5421 }
5422 qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
5423 qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
5424 return 0;
5425 }
5426
5427 #if IS_ENABLED(CONFIG_QETH_L3)
5428 static void qeth_l3_rebuild_skb(struct qeth_card *card, struct sk_buff *skb,
5429 struct qeth_hdr *hdr)
5430 {
5431 struct af_iucv_trans_hdr *iucv = (struct af_iucv_trans_hdr *) skb->data;
5432 struct qeth_hdr_layer3 *l3_hdr = &hdr->hdr.l3;
5433 struct net_device *dev = skb->dev;
5434
5435 if (IS_IQD(card) && iucv->magic == ETH_P_AF_IUCV) {
5436 dev_hard_header(skb, dev, ETH_P_AF_IUCV, dev->dev_addr,
5437 "FAKELL", skb->len);
5438 return;
5439 }
5440
5441 if (!(l3_hdr->flags & QETH_HDR_PASSTHRU)) {
5442 u16 prot = (l3_hdr->flags & QETH_HDR_IPV6) ? ETH_P_IPV6 :
5443 ETH_P_IP;
5444 unsigned char tg_addr[ETH_ALEN];
5445
5446 skb_reset_network_header(skb);
5447 switch (l3_hdr->flags & QETH_HDR_CAST_MASK) {
5448 case QETH_CAST_MULTICAST:
5449 if (prot == ETH_P_IP)
5450 ip_eth_mc_map(ip_hdr(skb)->daddr, tg_addr);
5451 else
5452 ipv6_eth_mc_map(&ipv6_hdr(skb)->daddr, tg_addr);
5453 QETH_CARD_STAT_INC(card, rx_multicast);
5454 break;
5455 case QETH_CAST_BROADCAST:
5456 ether_addr_copy(tg_addr, dev->broadcast);
5457 QETH_CARD_STAT_INC(card, rx_multicast);
5458 break;
5459 default:
5460 if (card->options.sniffer)
5461 skb->pkt_type = PACKET_OTHERHOST;
5462 ether_addr_copy(tg_addr, dev->dev_addr);
5463 }
5464
5465 if (l3_hdr->ext_flags & QETH_HDR_EXT_SRC_MAC_ADDR)
5466 dev_hard_header(skb, dev, prot, tg_addr,
5467 &l3_hdr->next_hop.rx.src_mac, skb->len);
5468 else
5469 dev_hard_header(skb, dev, prot, tg_addr, "FAKELL",
5470 skb->len);
5471 }
5472
5473 /* copy VLAN tag from hdr into skb */
5474 if (!card->options.sniffer &&
5475 (l3_hdr->ext_flags & (QETH_HDR_EXT_VLAN_FRAME |
5476 QETH_HDR_EXT_INCLUDE_VLAN_TAG))) {
5477 u16 tag = (l3_hdr->ext_flags & QETH_HDR_EXT_VLAN_FRAME) ?
5478 l3_hdr->vlan_id :
5479 l3_hdr->next_hop.rx.vlan_id;
5480
5481 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag);
5482 }
5483 }
5484 #endif
5485
5486 static void qeth_receive_skb(struct qeth_card *card, struct sk_buff *skb,
5487 struct qeth_hdr *hdr, bool uses_frags)
5488 {
5489 struct napi_struct *napi = &card->napi;
5490 bool is_cso;
5491
5492 switch (hdr->hdr.l2.id) {
5493 case QETH_HEADER_TYPE_OSN:
5494 skb_push(skb, sizeof(*hdr));
5495 skb_copy_to_linear_data(skb, hdr, sizeof(*hdr));
5496 QETH_CARD_STAT_ADD(card, rx_bytes, skb->len);
5497 QETH_CARD_STAT_INC(card, rx_packets);
5498
5499 card->osn_info.data_cb(skb);
5500 return;
5501 #if IS_ENABLED(CONFIG_QETH_L3)
5502 case QETH_HEADER_TYPE_LAYER3:
5503 qeth_l3_rebuild_skb(card, skb, hdr);
5504 is_cso = hdr->hdr.l3.ext_flags & QETH_HDR_EXT_CSUM_TRANSP_REQ;
5505 break;
5506 #endif
5507 case QETH_HEADER_TYPE_LAYER2:
5508 is_cso = hdr->hdr.l2.flags[1] & QETH_HDR_EXT_CSUM_TRANSP_REQ;
5509 break;
5510 default:
5511 /* never happens */
5512 if (uses_frags)
5513 napi_free_frags(napi);
5514 else
5515 dev_kfree_skb_any(skb);
5516 return;
5517 }
5518
5519 if (is_cso && (card->dev->features & NETIF_F_RXCSUM)) {
5520 skb->ip_summed = CHECKSUM_UNNECESSARY;
5521 QETH_CARD_STAT_INC(card, rx_skb_csum);
5522 } else {
5523 skb->ip_summed = CHECKSUM_NONE;
5524 }
5525
5526 QETH_CARD_STAT_ADD(card, rx_bytes, skb->len);
5527 QETH_CARD_STAT_INC(card, rx_packets);
5528 if (skb_is_nonlinear(skb)) {
5529 QETH_CARD_STAT_INC(card, rx_sg_skbs);
5530 QETH_CARD_STAT_ADD(card, rx_sg_frags,
5531 skb_shinfo(skb)->nr_frags);
5532 }
5533
5534 if (uses_frags) {
5535 napi_gro_frags(napi);
5536 } else {
5537 skb->protocol = eth_type_trans(skb, skb->dev);
5538 napi_gro_receive(napi, skb);
5539 }
5540 }
5541
5542 static void qeth_create_skb_frag(struct sk_buff *skb, char *data, int data_len)
5543 {
5544 struct page *page = virt_to_page(data);
5545 unsigned int next_frag;
5546
5547 next_frag = skb_shinfo(skb)->nr_frags;
5548 get_page(page);
5549 skb_add_rx_frag(skb, next_frag, page, offset_in_page(data), data_len,
5550 data_len);
5551 }
5552
5553 static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale)
5554 {
5555 return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY);
5556 }
5557
5558 static int qeth_extract_skb(struct qeth_card *card,
5559 struct qeth_qdio_buffer *qethbuffer, u8 *element_no,
5560 int *__offset)
5561 {
5562 struct qeth_priv *priv = netdev_priv(card->dev);
5563 struct qdio_buffer *buffer = qethbuffer->buffer;
5564 struct napi_struct *napi = &card->napi;
5565 struct qdio_buffer_element *element;
5566 unsigned int linear_len = 0;
5567 bool uses_frags = false;
5568 int offset = *__offset;
5569 bool use_rx_sg = false;
5570 unsigned int headroom;
5571 struct qeth_hdr *hdr;
5572 struct sk_buff *skb;
5573 int skb_len = 0;
5574
5575 element = &buffer->element[*element_no];
5576
5577 next_packet:
5578 /* qeth_hdr must not cross element boundaries */
5579 while (element->length < offset + sizeof(struct qeth_hdr)) {
5580 if (qeth_is_last_sbale(element))
5581 return -ENODATA;
5582 element++;
5583 offset = 0;
5584 }
5585
5586 hdr = phys_to_virt(element->addr) + offset;
5587 offset += sizeof(*hdr);
5588 skb = NULL;
5589
5590 switch (hdr->hdr.l2.id) {
5591 case QETH_HEADER_TYPE_LAYER2:
5592 skb_len = hdr->hdr.l2.pkt_length;
5593 linear_len = ETH_HLEN;
5594 headroom = 0;
5595 break;
5596 case QETH_HEADER_TYPE_LAYER3:
5597 skb_len = hdr->hdr.l3.length;
5598 if (!IS_LAYER3(card)) {
5599 QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5600 goto walk_packet;
5601 }
5602
5603 if (hdr->hdr.l3.flags & QETH_HDR_PASSTHRU) {
5604 linear_len = ETH_HLEN;
5605 headroom = 0;
5606 break;
5607 }
5608
5609 if (hdr->hdr.l3.flags & QETH_HDR_IPV6)
5610 linear_len = sizeof(struct ipv6hdr);
5611 else
5612 linear_len = sizeof(struct iphdr);
5613 headroom = ETH_HLEN;
5614 break;
5615 case QETH_HEADER_TYPE_OSN:
5616 skb_len = hdr->hdr.osn.pdu_length;
5617 if (!IS_OSN(card)) {
5618 QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5619 goto walk_packet;
5620 }
5621
5622 linear_len = skb_len;
5623 headroom = sizeof(struct qeth_hdr);
5624 break;
5625 default:
5626 if (hdr->hdr.l2.id & QETH_HEADER_MASK_INVAL)
5627 QETH_CARD_STAT_INC(card, rx_frame_errors);
5628 else
5629 QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5630
5631 /* Can't determine packet length, drop the whole buffer. */
5632 return -EPROTONOSUPPORT;
5633 }
5634
5635 if (skb_len < linear_len) {
5636 QETH_CARD_STAT_INC(card, rx_dropped_runt);
5637 goto walk_packet;
5638 }
5639
5640 use_rx_sg = (card->options.cq == QETH_CQ_ENABLED) ||
5641 (skb_len > READ_ONCE(priv->rx_copybreak) &&
5642 !atomic_read(&card->force_alloc_skb) &&
5643 !IS_OSN(card));
5644
5645 if (use_rx_sg) {
5646 /* QETH_CQ_ENABLED only: */
5647 if (qethbuffer->rx_skb &&
5648 skb_tailroom(qethbuffer->rx_skb) >= linear_len + headroom) {
5649 skb = qethbuffer->rx_skb;
5650 qethbuffer->rx_skb = NULL;
5651 goto use_skb;
5652 }
5653
5654 skb = napi_get_frags(napi);
5655 if (!skb) {
5656 /* -ENOMEM, no point in falling back further. */
5657 QETH_CARD_STAT_INC(card, rx_dropped_nomem);
5658 goto walk_packet;
5659 }
5660
5661 if (skb_tailroom(skb) >= linear_len + headroom) {
5662 uses_frags = true;
5663 goto use_skb;
5664 }
5665
5666 netdev_info_once(card->dev,
5667 "Insufficient linear space in NAPI frags skb, need %u but have %u\n",
5668 linear_len + headroom, skb_tailroom(skb));
5669 /* Shouldn't happen. Don't optimize, fall back to linear skb. */
5670 }
5671
5672 linear_len = skb_len;
5673 skb = napi_alloc_skb(napi, linear_len + headroom);
5674 if (!skb) {
5675 QETH_CARD_STAT_INC(card, rx_dropped_nomem);
5676 goto walk_packet;
5677 }
5678
5679 use_skb:
5680 if (headroom)
5681 skb_reserve(skb, headroom);
5682 walk_packet:
5683 while (skb_len) {
5684 int data_len = min(skb_len, (int)(element->length - offset));
5685 char *data = phys_to_virt(element->addr) + offset;
5686
5687 skb_len -= data_len;
5688 offset += data_len;
5689
5690 /* Extract data from current element: */
5691 if (skb && data_len) {
5692 if (linear_len) {
5693 unsigned int copy_len;
5694
5695 copy_len = min_t(unsigned int, linear_len,
5696 data_len);
5697
5698 skb_put_data(skb, data, copy_len);
5699 linear_len -= copy_len;
5700 data_len -= copy_len;
5701 data += copy_len;
5702 }
5703
5704 if (data_len)
5705 qeth_create_skb_frag(skb, data, data_len);
5706 }
5707
5708 /* Step forward to next element: */
5709 if (skb_len) {
5710 if (qeth_is_last_sbale(element)) {
5711 QETH_CARD_TEXT(card, 4, "unexeob");
5712 QETH_CARD_HEX(card, 2, buffer, sizeof(void *));
5713 if (skb) {
5714 if (uses_frags)
5715 napi_free_frags(napi);
5716 else
5717 dev_kfree_skb_any(skb);
5718 QETH_CARD_STAT_INC(card,
5719 rx_length_errors);
5720 }
5721 return -EMSGSIZE;
5722 }
5723 element++;
5724 offset = 0;
5725 }
5726 }
5727
5728 /* This packet was skipped, go get another one: */
5729 if (!skb)
5730 goto next_packet;
5731
5732 *element_no = element - &buffer->element[0];
5733 *__offset = offset;
5734
5735 qeth_receive_skb(card, skb, hdr, uses_frags);
5736 return 0;
5737 }
5738
5739 static unsigned int qeth_extract_skbs(struct qeth_card *card, int budget,
5740 struct qeth_qdio_buffer *buf, bool *done)
5741 {
5742 unsigned int work_done = 0;
5743
5744 while (budget) {
5745 if (qeth_extract_skb(card, buf, &card->rx.buf_element,
5746 &card->rx.e_offset)) {
5747 *done = true;
5748 break;
5749 }
5750
5751 work_done++;
5752 budget--;
5753 }
5754
5755 return work_done;
5756 }
5757
5758 static unsigned int qeth_rx_poll(struct qeth_card *card, int budget)
5759 {
5760 struct qeth_rx *ctx = &card->rx;
5761 unsigned int work_done = 0;
5762
5763 while (budget > 0) {
5764 struct qeth_qdio_buffer *buffer;
5765 unsigned int skbs_done = 0;
5766 bool done = false;
5767
5768 /* Fetch completed RX buffers: */
5769 if (!card->rx.b_count) {
5770 card->rx.qdio_err = 0;
5771 card->rx.b_count = qdio_get_next_buffers(
5772 card->data.ccwdev, 0, &card->rx.b_index,
5773 &card->rx.qdio_err);
5774 if (card->rx.b_count <= 0) {
5775 card->rx.b_count = 0;
5776 break;
5777 }
5778 }
5779
5780 /* Process one completed RX buffer: */
5781 buffer = &card->qdio.in_q->bufs[card->rx.b_index];
5782 if (!(card->rx.qdio_err &&
5783 qeth_check_qdio_errors(card, buffer->buffer,
5784 card->rx.qdio_err, "qinerr")))
5785 skbs_done = qeth_extract_skbs(card, budget, buffer,
5786 &done);
5787 else
5788 done = true;
5789
5790 work_done += skbs_done;
5791 budget -= skbs_done;
5792
5793 if (done) {
5794 QETH_CARD_STAT_INC(card, rx_bufs);
5795 qeth_put_buffer_pool_entry(card, buffer->pool_entry);
5796 buffer->pool_entry = NULL;
5797 card->rx.b_count--;
5798 ctx->bufs_refill++;
5799 ctx->bufs_refill -= qeth_rx_refill_queue(card,
5800 ctx->bufs_refill);
5801
5802 /* Step forward to next buffer: */
5803 card->rx.b_index = QDIO_BUFNR(card->rx.b_index + 1);
5804 card->rx.buf_element = 0;
5805 card->rx.e_offset = 0;
5806 }
5807 }
5808
5809 return work_done;
5810 }
5811
5812 static void qeth_cq_poll(struct qeth_card *card)
5813 {
5814 unsigned int work_done = 0;
5815
5816 while (work_done < QDIO_MAX_BUFFERS_PER_Q) {
5817 unsigned int start, error;
5818 int completed;
5819
5820 completed = qdio_inspect_queue(CARD_DDEV(card), 1, true, &start,
5821 &error);
5822 if (completed <= 0)
5823 return;
5824
5825 qeth_qdio_cq_handler(card, error, 1, start, completed);
5826 work_done += completed;
5827 }
5828 }
5829
5830 int qeth_poll(struct napi_struct *napi, int budget)
5831 {
5832 struct qeth_card *card = container_of(napi, struct qeth_card, napi);
5833 unsigned int work_done;
5834
5835 work_done = qeth_rx_poll(card, budget);
5836
5837 if (card->options.cq == QETH_CQ_ENABLED)
5838 qeth_cq_poll(card);
5839
5840 if (budget) {
5841 struct qeth_rx *ctx = &card->rx;
5842
5843 /* Process any substantial refill backlog: */
5844 ctx->bufs_refill -= qeth_rx_refill_queue(card, ctx->bufs_refill);
5845
5846 /* Exhausted the RX budget. Keep IRQ disabled, we get called again. */
5847 if (work_done >= budget)
5848 return work_done;
5849 }
5850
5851 if (napi_complete_done(napi, work_done) &&
5852 qdio_start_irq(CARD_DDEV(card)))
5853 napi_schedule(napi);
5854
5855 return work_done;
5856 }
5857 EXPORT_SYMBOL_GPL(qeth_poll);
5858
5859 static void qeth_iqd_tx_complete(struct qeth_qdio_out_q *queue,
5860 unsigned int bidx, bool error, int budget)
5861 {
5862 struct qeth_qdio_out_buffer *buffer = queue->bufs[bidx];
5863 u8 sflags = buffer->buffer->element[15].sflags;
5864 struct qeth_card *card = queue->card;
5865
5866 if (queue->bufstates && (queue->bufstates[bidx].flags &
5867 QDIO_OUTBUF_STATE_FLAG_PENDING)) {
5868 WARN_ON_ONCE(card->options.cq != QETH_CQ_ENABLED);
5869
5870 if (atomic_cmpxchg(&buffer->state, QETH_QDIO_BUF_PRIMED,
5871 QETH_QDIO_BUF_PENDING) ==
5872 QETH_QDIO_BUF_PRIMED)
5873 qeth_notify_skbs(queue, buffer, TX_NOTIFY_PENDING);
5874
5875 QETH_CARD_TEXT_(card, 5, "pel%u", bidx);
5876
5877 /* prepare the queue slot for re-use: */
5878 qeth_scrub_qdio_buffer(buffer->buffer, queue->max_elements);
5879 if (qeth_init_qdio_out_buf(queue, bidx)) {
5880 QETH_CARD_TEXT(card, 2, "outofbuf");
5881 qeth_schedule_recovery(card);
5882 }
5883
5884 return;
5885 }
5886
5887 if (card->options.cq == QETH_CQ_ENABLED)
5888 qeth_notify_skbs(queue, buffer,
5889 qeth_compute_cq_notification(sflags, 0));
5890 qeth_clear_output_buffer(queue, buffer, error, budget);
5891 }
5892
5893 static int qeth_tx_poll(struct napi_struct *napi, int budget)
5894 {
5895 struct qeth_qdio_out_q *queue = qeth_napi_to_out_queue(napi);
5896 unsigned int queue_no = queue->queue_no;
5897 struct qeth_card *card = queue->card;
5898 struct net_device *dev = card->dev;
5899 unsigned int work_done = 0;
5900 struct netdev_queue *txq;
5901
5902 txq = netdev_get_tx_queue(dev, qeth_iqd_translate_txq(dev, queue_no));
5903
5904 while (1) {
5905 unsigned int start, error, i;
5906 unsigned int packets = 0;
5907 unsigned int bytes = 0;
5908 int completed;
5909
5910 if (qeth_out_queue_is_empty(queue)) {
5911 napi_complete(napi);
5912 return 0;
5913 }
5914
5915 /* Give the CPU a breather: */
5916 if (work_done >= QDIO_MAX_BUFFERS_PER_Q) {
5917 QETH_TXQ_STAT_INC(queue, completion_yield);
5918 if (napi_complete_done(napi, 0))
5919 napi_schedule(napi);
5920 return 0;
5921 }
5922
5923 completed = qdio_inspect_queue(CARD_DDEV(card), queue_no, false,
5924 &start, &error);
5925 if (completed <= 0) {
5926 /* Ensure we see TX completion for pending work: */
5927 if (napi_complete_done(napi, 0))
5928 qeth_tx_arm_timer(queue, QETH_TX_TIMER_USECS);
5929 return 0;
5930 }
5931
5932 for (i = start; i < start + completed; i++) {
5933 struct qeth_qdio_out_buffer *buffer;
5934 unsigned int bidx = QDIO_BUFNR(i);
5935
5936 buffer = queue->bufs[bidx];
5937 packets += buffer->frames;
5938 bytes += buffer->bytes;
5939
5940 qeth_handle_send_error(card, buffer, error);
5941 qeth_iqd_tx_complete(queue, bidx, error, budget);
5942 qeth_cleanup_handled_pending(queue, bidx, false);
5943 }
5944
5945 netdev_tx_completed_queue(txq, packets, bytes);
5946 atomic_sub(completed, &queue->used_buffers);
5947 work_done += completed;
5948
5949 /* xmit may have observed the full-condition, but not yet
5950 * stopped the txq. In which case the code below won't trigger.
5951 * So before returning, xmit will re-check the txq's fill level
5952 * and wake it up if needed.
5953 */
5954 if (netif_tx_queue_stopped(txq) &&
5955 !qeth_out_queue_is_full(queue))
5956 netif_tx_wake_queue(txq);
5957 }
5958 }
5959
5960 static int qeth_setassparms_inspect_rc(struct qeth_ipa_cmd *cmd)
5961 {
5962 if (!cmd->hdr.return_code)
5963 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
5964 return cmd->hdr.return_code;
5965 }
5966
5967 static int qeth_setassparms_get_caps_cb(struct qeth_card *card,
5968 struct qeth_reply *reply,
5969 unsigned long data)
5970 {
5971 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5972 struct qeth_ipa_caps *caps = reply->param;
5973
5974 if (qeth_setassparms_inspect_rc(cmd))
5975 return -EIO;
5976
5977 caps->supported = cmd->data.setassparms.data.caps.supported;
5978 caps->enabled = cmd->data.setassparms.data.caps.enabled;
5979 return 0;
5980 }
5981
5982 int qeth_setassparms_cb(struct qeth_card *card,
5983 struct qeth_reply *reply, unsigned long data)
5984 {
5985 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5986
5987 QETH_CARD_TEXT(card, 4, "defadpcb");
5988
5989 if (cmd->hdr.return_code)
5990 return -EIO;
5991
5992 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
5993 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
5994 card->options.ipa4.enabled = cmd->hdr.assists.enabled;
5995 if (cmd->hdr.prot_version == QETH_PROT_IPV6)
5996 card->options.ipa6.enabled = cmd->hdr.assists.enabled;
5997 return 0;
5998 }
5999 EXPORT_SYMBOL_GPL(qeth_setassparms_cb);
6000
6001 struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card,
6002 enum qeth_ipa_funcs ipa_func,
6003 u16 cmd_code,
6004 unsigned int data_length,
6005 enum qeth_prot_versions prot)
6006 {
6007 struct qeth_ipacmd_setassparms *setassparms;
6008 struct qeth_ipacmd_setassparms_hdr *hdr;
6009 struct qeth_cmd_buffer *iob;
6010
6011 QETH_CARD_TEXT(card, 4, "getasscm");
6012 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETASSPARMS, prot,
6013 data_length +
6014 offsetof(struct qeth_ipacmd_setassparms,
6015 data));
6016 if (!iob)
6017 return NULL;
6018
6019 setassparms = &__ipa_cmd(iob)->data.setassparms;
6020 setassparms->assist_no = ipa_func;
6021
6022 hdr = &setassparms->hdr;
6023 hdr->length = sizeof(*hdr) + data_length;
6024 hdr->command_code = cmd_code;
6025 return iob;
6026 }
6027 EXPORT_SYMBOL_GPL(qeth_get_setassparms_cmd);
6028
6029 int qeth_send_simple_setassparms_prot(struct qeth_card *card,
6030 enum qeth_ipa_funcs ipa_func,
6031 u16 cmd_code, u32 *data,
6032 enum qeth_prot_versions prot)
6033 {
6034 unsigned int length = data ? SETASS_DATA_SIZEOF(flags_32bit) : 0;
6035 struct qeth_cmd_buffer *iob;
6036
6037 QETH_CARD_TEXT_(card, 4, "simassp%i", prot);
6038 iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code, length, prot);
6039 if (!iob)
6040 return -ENOMEM;
6041
6042 if (data)
6043 __ipa_cmd(iob)->data.setassparms.data.flags_32bit = *data;
6044 return qeth_send_ipa_cmd(card, iob, qeth_setassparms_cb, NULL);
6045 }
6046 EXPORT_SYMBOL_GPL(qeth_send_simple_setassparms_prot);
6047
6048 static void qeth_unregister_dbf_views(void)
6049 {
6050 int x;
6051
6052 for (x = 0; x < QETH_DBF_INFOS; x++) {
6053 debug_unregister(qeth_dbf[x].id);
6054 qeth_dbf[x].id = NULL;
6055 }
6056 }
6057
6058 void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...)
6059 {
6060 char dbf_txt_buf[32];
6061 va_list args;
6062
6063 if (!debug_level_enabled(id, level))
6064 return;
6065 va_start(args, fmt);
6066 vsnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
6067 va_end(args);
6068 debug_text_event(id, level, dbf_txt_buf);
6069 }
6070 EXPORT_SYMBOL_GPL(qeth_dbf_longtext);
6071
6072 static int qeth_register_dbf_views(void)
6073 {
6074 int ret;
6075 int x;
6076
6077 for (x = 0; x < QETH_DBF_INFOS; x++) {
6078 /* register the areas */
6079 qeth_dbf[x].id = debug_register(qeth_dbf[x].name,
6080 qeth_dbf[x].pages,
6081 qeth_dbf[x].areas,
6082 qeth_dbf[x].len);
6083 if (qeth_dbf[x].id == NULL) {
6084 qeth_unregister_dbf_views();
6085 return -ENOMEM;
6086 }
6087
6088 /* register a view */
6089 ret = debug_register_view(qeth_dbf[x].id, qeth_dbf[x].view);
6090 if (ret) {
6091 qeth_unregister_dbf_views();
6092 return ret;
6093 }
6094
6095 /* set a passing level */
6096 debug_set_level(qeth_dbf[x].id, qeth_dbf[x].level);
6097 }
6098
6099 return 0;
6100 }
6101
6102 static DEFINE_MUTEX(qeth_mod_mutex); /* for synchronized module loading */
6103
6104 int qeth_core_load_discipline(struct qeth_card *card,
6105 enum qeth_discipline_id discipline)
6106 {
6107 mutex_lock(&qeth_mod_mutex);
6108 switch (discipline) {
6109 case QETH_DISCIPLINE_LAYER3:
6110 card->discipline = try_then_request_module(
6111 symbol_get(qeth_l3_discipline), "qeth_l3");
6112 break;
6113 case QETH_DISCIPLINE_LAYER2:
6114 card->discipline = try_then_request_module(
6115 symbol_get(qeth_l2_discipline), "qeth_l2");
6116 break;
6117 default:
6118 break;
6119 }
6120 mutex_unlock(&qeth_mod_mutex);
6121
6122 if (!card->discipline) {
6123 dev_err(&card->gdev->dev, "There is no kernel module to "
6124 "support discipline %d\n", discipline);
6125 return -EINVAL;
6126 }
6127
6128 card->options.layer = discipline;
6129 return 0;
6130 }
6131
6132 void qeth_core_free_discipline(struct qeth_card *card)
6133 {
6134 if (IS_LAYER2(card))
6135 symbol_put(qeth_l2_discipline);
6136 else
6137 symbol_put(qeth_l3_discipline);
6138 card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
6139 card->discipline = NULL;
6140 }
6141
6142 const struct device_type qeth_generic_devtype = {
6143 .name = "qeth_generic",
6144 .groups = qeth_generic_attr_groups,
6145 };
6146 EXPORT_SYMBOL_GPL(qeth_generic_devtype);
6147
6148 static const struct device_type qeth_osn_devtype = {
6149 .name = "qeth_osn",
6150 .groups = qeth_osn_attr_groups,
6151 };
6152
6153 #define DBF_NAME_LEN 20
6154
6155 struct qeth_dbf_entry {
6156 char dbf_name[DBF_NAME_LEN];
6157 debug_info_t *dbf_info;
6158 struct list_head dbf_list;
6159 };
6160
6161 static LIST_HEAD(qeth_dbf_list);
6162 static DEFINE_MUTEX(qeth_dbf_list_mutex);
6163
6164 static debug_info_t *qeth_get_dbf_entry(char *name)
6165 {
6166 struct qeth_dbf_entry *entry;
6167 debug_info_t *rc = NULL;
6168
6169 mutex_lock(&qeth_dbf_list_mutex);
6170 list_for_each_entry(entry, &qeth_dbf_list, dbf_list) {
6171 if (strcmp(entry->dbf_name, name) == 0) {
6172 rc = entry->dbf_info;
6173 break;
6174 }
6175 }
6176 mutex_unlock(&qeth_dbf_list_mutex);
6177 return rc;
6178 }
6179
6180 static int qeth_add_dbf_entry(struct qeth_card *card, char *name)
6181 {
6182 struct qeth_dbf_entry *new_entry;
6183
6184 card->debug = debug_register(name, 2, 1, 8);
6185 if (!card->debug) {
6186 QETH_DBF_TEXT_(SETUP, 2, "%s", "qcdbf");
6187 goto err;
6188 }
6189 if (debug_register_view(card->debug, &debug_hex_ascii_view))
6190 goto err_dbg;
6191 new_entry = kzalloc(sizeof(struct qeth_dbf_entry), GFP_KERNEL);
6192 if (!new_entry)
6193 goto err_dbg;
6194 strncpy(new_entry->dbf_name, name, DBF_NAME_LEN);
6195 new_entry->dbf_info = card->debug;
6196 mutex_lock(&qeth_dbf_list_mutex);
6197 list_add(&new_entry->dbf_list, &qeth_dbf_list);
6198 mutex_unlock(&qeth_dbf_list_mutex);
6199
6200 return 0;
6201
6202 err_dbg:
6203 debug_unregister(card->debug);
6204 err:
6205 return -ENOMEM;
6206 }
6207
6208 static void qeth_clear_dbf_list(void)
6209 {
6210 struct qeth_dbf_entry *entry, *tmp;
6211
6212 mutex_lock(&qeth_dbf_list_mutex);
6213 list_for_each_entry_safe(entry, tmp, &qeth_dbf_list, dbf_list) {
6214 list_del(&entry->dbf_list);
6215 debug_unregister(entry->dbf_info);
6216 kfree(entry);
6217 }
6218 mutex_unlock(&qeth_dbf_list_mutex);
6219 }
6220
6221 static struct net_device *qeth_alloc_netdev(struct qeth_card *card)
6222 {
6223 struct net_device *dev;
6224 struct qeth_priv *priv;
6225
6226 switch (card->info.type) {
6227 case QETH_CARD_TYPE_IQD:
6228 dev = alloc_netdev_mqs(sizeof(*priv), "hsi%d", NET_NAME_UNKNOWN,
6229 ether_setup, QETH_MAX_OUT_QUEUES, 1);
6230 break;
6231 case QETH_CARD_TYPE_OSM:
6232 dev = alloc_etherdev(sizeof(*priv));
6233 break;
6234 case QETH_CARD_TYPE_OSN:
6235 dev = alloc_netdev(sizeof(*priv), "osn%d", NET_NAME_UNKNOWN,
6236 ether_setup);
6237 break;
6238 default:
6239 dev = alloc_etherdev_mqs(sizeof(*priv), QETH_MAX_OUT_QUEUES, 1);
6240 }
6241
6242 if (!dev)
6243 return NULL;
6244
6245 priv = netdev_priv(dev);
6246 priv->rx_copybreak = QETH_RX_COPYBREAK;
6247 priv->tx_wanted_queues = IS_IQD(card) ? QETH_IQD_MIN_TXQ : 1;
6248
6249 dev->ml_priv = card;
6250 dev->watchdog_timeo = QETH_TX_TIMEOUT;
6251 dev->min_mtu = IS_OSN(card) ? 64 : 576;
6252 /* initialized when device first goes online: */
6253 dev->max_mtu = 0;
6254 dev->mtu = 0;
6255 SET_NETDEV_DEV(dev, &card->gdev->dev);
6256 netif_carrier_off(dev);
6257
6258 if (IS_OSN(card)) {
6259 dev->ethtool_ops = &qeth_osn_ethtool_ops;
6260 } else {
6261 dev->ethtool_ops = &qeth_ethtool_ops;
6262 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
6263 dev->hw_features |= NETIF_F_SG;
6264 dev->vlan_features |= NETIF_F_SG;
6265 if (IS_IQD(card))
6266 dev->features |= NETIF_F_SG;
6267 }
6268
6269 return dev;
6270 }
6271
6272 struct net_device *qeth_clone_netdev(struct net_device *orig)
6273 {
6274 struct net_device *clone = qeth_alloc_netdev(orig->ml_priv);
6275
6276 if (!clone)
6277 return NULL;
6278
6279 clone->dev_port = orig->dev_port;
6280 return clone;
6281 }
6282
6283 static int qeth_core_probe_device(struct ccwgroup_device *gdev)
6284 {
6285 struct qeth_card *card;
6286 struct device *dev;
6287 int rc;
6288 enum qeth_discipline_id enforced_disc;
6289 char dbf_name[DBF_NAME_LEN];
6290
6291 QETH_DBF_TEXT(SETUP, 2, "probedev");
6292
6293 dev = &gdev->dev;
6294 if (!get_device(dev))
6295 return -ENODEV;
6296
6297 QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev));
6298
6299 card = qeth_alloc_card(gdev);
6300 if (!card) {
6301 QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM);
6302 rc = -ENOMEM;
6303 goto err_dev;
6304 }
6305
6306 snprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
6307 dev_name(&gdev->dev));
6308 card->debug = qeth_get_dbf_entry(dbf_name);
6309 if (!card->debug) {
6310 rc = qeth_add_dbf_entry(card, dbf_name);
6311 if (rc)
6312 goto err_card;
6313 }
6314
6315 qeth_setup_card(card);
6316 card->dev = qeth_alloc_netdev(card);
6317 if (!card->dev) {
6318 rc = -ENOMEM;
6319 goto err_card;
6320 }
6321
6322 qeth_determine_capabilities(card);
6323 qeth_set_blkt_defaults(card);
6324
6325 card->qdio.no_out_queues = card->dev->num_tx_queues;
6326 rc = qeth_update_from_chp_desc(card);
6327 if (rc)
6328 goto err_chp_desc;
6329
6330 enforced_disc = qeth_enforce_discipline(card);
6331 switch (enforced_disc) {
6332 case QETH_DISCIPLINE_UNDETERMINED:
6333 gdev->dev.type = &qeth_generic_devtype;
6334 break;
6335 default:
6336 card->info.layer_enforced = true;
6337 rc = qeth_core_load_discipline(card, enforced_disc);
6338 if (rc)
6339 goto err_load;
6340
6341 gdev->dev.type = IS_OSN(card) ? &qeth_osn_devtype :
6342 card->discipline->devtype;
6343 rc = card->discipline->setup(card->gdev);
6344 if (rc)
6345 goto err_disc;
6346 break;
6347 }
6348
6349 return 0;
6350
6351 err_disc:
6352 qeth_core_free_discipline(card);
6353 err_load:
6354 err_chp_desc:
6355 free_netdev(card->dev);
6356 err_card:
6357 qeth_core_free_card(card);
6358 err_dev:
6359 put_device(dev);
6360 return rc;
6361 }
6362
6363 static void qeth_core_remove_device(struct ccwgroup_device *gdev)
6364 {
6365 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6366
6367 QETH_CARD_TEXT(card, 2, "removedv");
6368
6369 if (card->discipline) {
6370 card->discipline->remove(gdev);
6371 qeth_core_free_discipline(card);
6372 }
6373
6374 qeth_free_qdio_queues(card);
6375
6376 free_netdev(card->dev);
6377 qeth_core_free_card(card);
6378 put_device(&gdev->dev);
6379 }
6380
6381 static int qeth_core_set_online(struct ccwgroup_device *gdev)
6382 {
6383 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6384 int rc = 0;
6385 enum qeth_discipline_id def_discipline;
6386
6387 if (!card->discipline) {
6388 def_discipline = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
6389 QETH_DISCIPLINE_LAYER2;
6390 rc = qeth_core_load_discipline(card, def_discipline);
6391 if (rc)
6392 goto err;
6393 rc = card->discipline->setup(card->gdev);
6394 if (rc) {
6395 qeth_core_free_discipline(card);
6396 goto err;
6397 }
6398 }
6399
6400 rc = qeth_set_online(card);
6401 err:
6402 return rc;
6403 }
6404
6405 static int qeth_core_set_offline(struct ccwgroup_device *gdev)
6406 {
6407 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6408
6409 return qeth_set_offline(card, false);
6410 }
6411
6412 static void qeth_core_shutdown(struct ccwgroup_device *gdev)
6413 {
6414 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6415
6416 qeth_set_allowed_threads(card, 0, 1);
6417 if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
6418 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
6419 qeth_qdio_clear_card(card, 0);
6420 qeth_drain_output_queues(card);
6421 qdio_free(CARD_DDEV(card));
6422 }
6423
6424 static ssize_t group_store(struct device_driver *ddrv, const char *buf,
6425 size_t count)
6426 {
6427 int err;
6428
6429 err = ccwgroup_create_dev(qeth_core_root_dev, to_ccwgroupdrv(ddrv), 3,
6430 buf);
6431
6432 return err ? err : count;
6433 }
6434 static DRIVER_ATTR_WO(group);
6435
6436 static struct attribute *qeth_drv_attrs[] = {
6437 &driver_attr_group.attr,
6438 NULL,
6439 };
6440 static struct attribute_group qeth_drv_attr_group = {
6441 .attrs = qeth_drv_attrs,
6442 };
6443 static const struct attribute_group *qeth_drv_attr_groups[] = {
6444 &qeth_drv_attr_group,
6445 NULL,
6446 };
6447
6448 static struct ccwgroup_driver qeth_core_ccwgroup_driver = {
6449 .driver = {
6450 .groups = qeth_drv_attr_groups,
6451 .owner = THIS_MODULE,
6452 .name = "qeth",
6453 },
6454 .ccw_driver = &qeth_ccw_driver,
6455 .setup = qeth_core_probe_device,
6456 .remove = qeth_core_remove_device,
6457 .set_online = qeth_core_set_online,
6458 .set_offline = qeth_core_set_offline,
6459 .shutdown = qeth_core_shutdown,
6460 };
6461
6462 struct qeth_card *qeth_get_card_by_busid(char *bus_id)
6463 {
6464 struct ccwgroup_device *gdev;
6465 struct qeth_card *card;
6466
6467 gdev = get_ccwgroupdev_by_busid(&qeth_core_ccwgroup_driver, bus_id);
6468 if (!gdev)
6469 return NULL;
6470
6471 card = dev_get_drvdata(&gdev->dev);
6472 put_device(&gdev->dev);
6473 return card;
6474 }
6475 EXPORT_SYMBOL_GPL(qeth_get_card_by_busid);
6476
6477 int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
6478 {
6479 struct qeth_card *card = dev->ml_priv;
6480 struct mii_ioctl_data *mii_data;
6481 int rc = 0;
6482
6483 switch (cmd) {
6484 case SIOC_QETH_ADP_SET_SNMP_CONTROL:
6485 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
6486 break;
6487 case SIOC_QETH_GET_CARD_TYPE:
6488 if ((IS_OSD(card) || IS_OSM(card) || IS_OSX(card)) &&
6489 !IS_VM_NIC(card))
6490 return 1;
6491 return 0;
6492 case SIOCGMIIPHY:
6493 mii_data = if_mii(rq);
6494 mii_data->phy_id = 0;
6495 break;
6496 case SIOCGMIIREG:
6497 mii_data = if_mii(rq);
6498 if (mii_data->phy_id != 0)
6499 rc = -EINVAL;
6500 else
6501 mii_data->val_out = qeth_mdio_read(dev,
6502 mii_data->phy_id, mii_data->reg_num);
6503 break;
6504 case SIOC_QETH_QUERY_OAT:
6505 rc = qeth_query_oat_command(card, rq->ifr_ifru.ifru_data);
6506 break;
6507 default:
6508 if (card->discipline->do_ioctl)
6509 rc = card->discipline->do_ioctl(dev, rq, cmd);
6510 else
6511 rc = -EOPNOTSUPP;
6512 }
6513 if (rc)
6514 QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
6515 return rc;
6516 }
6517 EXPORT_SYMBOL_GPL(qeth_do_ioctl);
6518
6519 static int qeth_start_csum_cb(struct qeth_card *card, struct qeth_reply *reply,
6520 unsigned long data)
6521 {
6522 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6523 u32 *features = reply->param;
6524
6525 if (qeth_setassparms_inspect_rc(cmd))
6526 return -EIO;
6527
6528 *features = cmd->data.setassparms.data.flags_32bit;
6529 return 0;
6530 }
6531
6532 static int qeth_set_csum_off(struct qeth_card *card, enum qeth_ipa_funcs cstype,
6533 enum qeth_prot_versions prot)
6534 {
6535 return qeth_send_simple_setassparms_prot(card, cstype, IPA_CMD_ASS_STOP,
6536 NULL, prot);
6537 }
6538
6539 static int qeth_set_csum_on(struct qeth_card *card, enum qeth_ipa_funcs cstype,
6540 enum qeth_prot_versions prot, u8 *lp2lp)
6541 {
6542 u32 required_features = QETH_IPA_CHECKSUM_UDP | QETH_IPA_CHECKSUM_TCP;
6543 struct qeth_cmd_buffer *iob;
6544 struct qeth_ipa_caps caps;
6545 u32 features;
6546 int rc;
6547
6548 /* some L3 HW requires combined L3+L4 csum offload: */
6549 if (IS_LAYER3(card) && prot == QETH_PROT_IPV4 &&
6550 cstype == IPA_OUTBOUND_CHECKSUM)
6551 required_features |= QETH_IPA_CHECKSUM_IP_HDR;
6552
6553 iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_START, 0,
6554 prot);
6555 if (!iob)
6556 return -ENOMEM;
6557
6558 rc = qeth_send_ipa_cmd(card, iob, qeth_start_csum_cb, &features);
6559 if (rc)
6560 return rc;
6561
6562 if ((required_features & features) != required_features) {
6563 qeth_set_csum_off(card, cstype, prot);
6564 return -EOPNOTSUPP;
6565 }
6566
6567 iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_ENABLE,
6568 SETASS_DATA_SIZEOF(flags_32bit),
6569 prot);
6570 if (!iob) {
6571 qeth_set_csum_off(card, cstype, prot);
6572 return -ENOMEM;
6573 }
6574
6575 if (features & QETH_IPA_CHECKSUM_LP2LP)
6576 required_features |= QETH_IPA_CHECKSUM_LP2LP;
6577 __ipa_cmd(iob)->data.setassparms.data.flags_32bit = required_features;
6578 rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6579 if (rc) {
6580 qeth_set_csum_off(card, cstype, prot);
6581 return rc;
6582 }
6583
6584 if (!qeth_ipa_caps_supported(&caps, required_features) ||
6585 !qeth_ipa_caps_enabled(&caps, required_features)) {
6586 qeth_set_csum_off(card, cstype, prot);
6587 return -EOPNOTSUPP;
6588 }
6589
6590 dev_info(&card->gdev->dev, "HW Checksumming (%sbound IPv%d) enabled\n",
6591 cstype == IPA_INBOUND_CHECKSUM ? "in" : "out", prot);
6592
6593 if (lp2lp)
6594 *lp2lp = qeth_ipa_caps_enabled(&caps, QETH_IPA_CHECKSUM_LP2LP);
6595
6596 return 0;
6597 }
6598
6599 static int qeth_set_ipa_csum(struct qeth_card *card, bool on, int cstype,
6600 enum qeth_prot_versions prot, u8 *lp2lp)
6601 {
6602 return on ? qeth_set_csum_on(card, cstype, prot, lp2lp) :
6603 qeth_set_csum_off(card, cstype, prot);
6604 }
6605
6606 static int qeth_start_tso_cb(struct qeth_card *card, struct qeth_reply *reply,
6607 unsigned long data)
6608 {
6609 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6610 struct qeth_tso_start_data *tso_data = reply->param;
6611
6612 if (qeth_setassparms_inspect_rc(cmd))
6613 return -EIO;
6614
6615 tso_data->mss = cmd->data.setassparms.data.tso.mss;
6616 tso_data->supported = cmd->data.setassparms.data.tso.supported;
6617 return 0;
6618 }
6619
6620 static int qeth_set_tso_off(struct qeth_card *card,
6621 enum qeth_prot_versions prot)
6622 {
6623 return qeth_send_simple_setassparms_prot(card, IPA_OUTBOUND_TSO,
6624 IPA_CMD_ASS_STOP, NULL, prot);
6625 }
6626
6627 static int qeth_set_tso_on(struct qeth_card *card,
6628 enum qeth_prot_versions prot)
6629 {
6630 struct qeth_tso_start_data tso_data;
6631 struct qeth_cmd_buffer *iob;
6632 struct qeth_ipa_caps caps;
6633 int rc;
6634
6635 iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6636 IPA_CMD_ASS_START, 0, prot);
6637 if (!iob)
6638 return -ENOMEM;
6639
6640 rc = qeth_send_ipa_cmd(card, iob, qeth_start_tso_cb, &tso_data);
6641 if (rc)
6642 return rc;
6643
6644 if (!tso_data.mss || !(tso_data.supported & QETH_IPA_LARGE_SEND_TCP)) {
6645 qeth_set_tso_off(card, prot);
6646 return -EOPNOTSUPP;
6647 }
6648
6649 iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6650 IPA_CMD_ASS_ENABLE,
6651 SETASS_DATA_SIZEOF(caps), prot);
6652 if (!iob) {
6653 qeth_set_tso_off(card, prot);
6654 return -ENOMEM;
6655 }
6656
6657 /* enable TSO capability */
6658 __ipa_cmd(iob)->data.setassparms.data.caps.enabled =
6659 QETH_IPA_LARGE_SEND_TCP;
6660 rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6661 if (rc) {
6662 qeth_set_tso_off(card, prot);
6663 return rc;
6664 }
6665
6666 if (!qeth_ipa_caps_supported(&caps, QETH_IPA_LARGE_SEND_TCP) ||
6667 !qeth_ipa_caps_enabled(&caps, QETH_IPA_LARGE_SEND_TCP)) {
6668 qeth_set_tso_off(card, prot);
6669 return -EOPNOTSUPP;
6670 }
6671
6672 dev_info(&card->gdev->dev, "TSOv%u enabled (MSS: %u)\n", prot,
6673 tso_data.mss);
6674 return 0;
6675 }
6676
6677 static int qeth_set_ipa_tso(struct qeth_card *card, bool on,
6678 enum qeth_prot_versions prot)
6679 {
6680 return on ? qeth_set_tso_on(card, prot) : qeth_set_tso_off(card, prot);
6681 }
6682
6683 static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on)
6684 {
6685 int rc_ipv4 = (on) ? -EOPNOTSUPP : 0;
6686 int rc_ipv6;
6687
6688 if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
6689 rc_ipv4 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6690 QETH_PROT_IPV4, NULL);
6691 if (!qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6692 /* no/one Offload Assist available, so the rc is trivial */
6693 return rc_ipv4;
6694
6695 rc_ipv6 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6696 QETH_PROT_IPV6, NULL);
6697
6698 if (on)
6699 /* enable: success if any Assist is active */
6700 return (rc_ipv6) ? rc_ipv4 : 0;
6701
6702 /* disable: failure if any Assist is still active */
6703 return (rc_ipv6) ? rc_ipv6 : rc_ipv4;
6704 }
6705
6706 /**
6707 * qeth_enable_hw_features() - (Re-)Enable HW functions for device features
6708 * @dev: a net_device
6709 */
6710 void qeth_enable_hw_features(struct net_device *dev)
6711 {
6712 struct qeth_card *card = dev->ml_priv;
6713 netdev_features_t features;
6714
6715 features = dev->features;
6716 /* force-off any feature that might need an IPA sequence.
6717 * netdev_update_features() will restart them.
6718 */
6719 dev->features &= ~dev->hw_features;
6720 /* toggle VLAN filter, so that VIDs are re-programmed: */
6721 if (IS_LAYER2(card) && IS_VM_NIC(card)) {
6722 dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
6723 dev->wanted_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
6724 }
6725 netdev_update_features(dev);
6726 if (features != dev->features)
6727 dev_warn(&card->gdev->dev,
6728 "Device recovery failed to restore all offload features\n");
6729 }
6730 EXPORT_SYMBOL_GPL(qeth_enable_hw_features);
6731
6732 static void qeth_check_restricted_features(struct qeth_card *card,
6733 netdev_features_t changed,
6734 netdev_features_t actual)
6735 {
6736 netdev_features_t ipv6_features = NETIF_F_TSO6;
6737 netdev_features_t ipv4_features = NETIF_F_TSO;
6738
6739 if (!card->info.has_lp2lp_cso_v6)
6740 ipv6_features |= NETIF_F_IPV6_CSUM;
6741 if (!card->info.has_lp2lp_cso_v4)
6742 ipv4_features |= NETIF_F_IP_CSUM;
6743
6744 if ((changed & ipv6_features) && !(actual & ipv6_features))
6745 qeth_flush_local_addrs6(card);
6746 if ((changed & ipv4_features) && !(actual & ipv4_features))
6747 qeth_flush_local_addrs4(card);
6748 }
6749
6750 int qeth_set_features(struct net_device *dev, netdev_features_t features)
6751 {
6752 struct qeth_card *card = dev->ml_priv;
6753 netdev_features_t changed = dev->features ^ features;
6754 int rc = 0;
6755
6756 QETH_CARD_TEXT(card, 2, "setfeat");
6757 QETH_CARD_HEX(card, 2, &features, sizeof(features));
6758
6759 if ((changed & NETIF_F_IP_CSUM)) {
6760 rc = qeth_set_ipa_csum(card, features & NETIF_F_IP_CSUM,
6761 IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV4,
6762 &card->info.has_lp2lp_cso_v4);
6763 if (rc)
6764 changed ^= NETIF_F_IP_CSUM;
6765 }
6766 if (changed & NETIF_F_IPV6_CSUM) {
6767 rc = qeth_set_ipa_csum(card, features & NETIF_F_IPV6_CSUM,
6768 IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV6,
6769 &card->info.has_lp2lp_cso_v6);
6770 if (rc)
6771 changed ^= NETIF_F_IPV6_CSUM;
6772 }
6773 if (changed & NETIF_F_RXCSUM) {
6774 rc = qeth_set_ipa_rx_csum(card, features & NETIF_F_RXCSUM);
6775 if (rc)
6776 changed ^= NETIF_F_RXCSUM;
6777 }
6778 if (changed & NETIF_F_TSO) {
6779 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO,
6780 QETH_PROT_IPV4);
6781 if (rc)
6782 changed ^= NETIF_F_TSO;
6783 }
6784 if (changed & NETIF_F_TSO6) {
6785 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO6,
6786 QETH_PROT_IPV6);
6787 if (rc)
6788 changed ^= NETIF_F_TSO6;
6789 }
6790
6791 qeth_check_restricted_features(card, dev->features ^ features,
6792 dev->features ^ changed);
6793
6794 /* everything changed successfully? */
6795 if ((dev->features ^ features) == changed)
6796 return 0;
6797 /* something went wrong. save changed features and return error */
6798 dev->features ^= changed;
6799 return -EIO;
6800 }
6801 EXPORT_SYMBOL_GPL(qeth_set_features);
6802
6803 netdev_features_t qeth_fix_features(struct net_device *dev,
6804 netdev_features_t features)
6805 {
6806 struct qeth_card *card = dev->ml_priv;
6807
6808 QETH_CARD_TEXT(card, 2, "fixfeat");
6809 if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
6810 features &= ~NETIF_F_IP_CSUM;
6811 if (!qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6))
6812 features &= ~NETIF_F_IPV6_CSUM;
6813 if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM) &&
6814 !qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6815 features &= ~NETIF_F_RXCSUM;
6816 if (!qeth_is_supported(card, IPA_OUTBOUND_TSO))
6817 features &= ~NETIF_F_TSO;
6818 if (!qeth_is_supported6(card, IPA_OUTBOUND_TSO))
6819 features &= ~NETIF_F_TSO6;
6820
6821 QETH_CARD_HEX(card, 2, &features, sizeof(features));
6822 return features;
6823 }
6824 EXPORT_SYMBOL_GPL(qeth_fix_features);
6825
6826 netdev_features_t qeth_features_check(struct sk_buff *skb,
6827 struct net_device *dev,
6828 netdev_features_t features)
6829 {
6830 struct qeth_card *card = dev->ml_priv;
6831
6832 /* Traffic with local next-hop is not eligible for some offloads: */
6833 if (skb->ip_summed == CHECKSUM_PARTIAL &&
6834 READ_ONCE(card->options.isolation) != ISOLATION_MODE_FWD) {
6835 netdev_features_t restricted = 0;
6836
6837 if (skb_is_gso(skb) && !netif_needs_gso(skb, features))
6838 restricted |= NETIF_F_ALL_TSO;
6839
6840 switch (vlan_get_protocol(skb)) {
6841 case htons(ETH_P_IP):
6842 if (!card->info.has_lp2lp_cso_v4)
6843 restricted |= NETIF_F_IP_CSUM;
6844
6845 if (restricted && qeth_next_hop_is_local_v4(card, skb))
6846 features &= ~restricted;
6847 break;
6848 case htons(ETH_P_IPV6):
6849 if (!card->info.has_lp2lp_cso_v6)
6850 restricted |= NETIF_F_IPV6_CSUM;
6851
6852 if (restricted && qeth_next_hop_is_local_v6(card, skb))
6853 features &= ~restricted;
6854 break;
6855 default:
6856 break;
6857 }
6858 }
6859
6860 /* GSO segmentation builds skbs with
6861 * a (small) linear part for the headers, and
6862 * page frags for the data.
6863 * Compared to a linear skb, the header-only part consumes an
6864 * additional buffer element. This reduces buffer utilization, and
6865 * hurts throughput. So compress small segments into one element.
6866 */
6867 if (netif_needs_gso(skb, features)) {
6868 /* match skb_segment(): */
6869 unsigned int doffset = skb->data - skb_mac_header(skb);
6870 unsigned int hsize = skb_shinfo(skb)->gso_size;
6871 unsigned int hroom = skb_headroom(skb);
6872
6873 /* linearize only if resulting skb allocations are order-0: */
6874 if (SKB_DATA_ALIGN(hroom + doffset + hsize) <= SKB_MAX_HEAD(0))
6875 features &= ~NETIF_F_SG;
6876 }
6877
6878 return vlan_features_check(skb, features);
6879 }
6880 EXPORT_SYMBOL_GPL(qeth_features_check);
6881
6882 void qeth_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
6883 {
6884 struct qeth_card *card = dev->ml_priv;
6885 struct qeth_qdio_out_q *queue;
6886 unsigned int i;
6887
6888 QETH_CARD_TEXT(card, 5, "getstat");
6889
6890 stats->rx_packets = card->stats.rx_packets;
6891 stats->rx_bytes = card->stats.rx_bytes;
6892 stats->rx_errors = card->stats.rx_length_errors +
6893 card->stats.rx_frame_errors +
6894 card->stats.rx_fifo_errors;
6895 stats->rx_dropped = card->stats.rx_dropped_nomem +
6896 card->stats.rx_dropped_notsupp +
6897 card->stats.rx_dropped_runt;
6898 stats->multicast = card->stats.rx_multicast;
6899 stats->rx_length_errors = card->stats.rx_length_errors;
6900 stats->rx_frame_errors = card->stats.rx_frame_errors;
6901 stats->rx_fifo_errors = card->stats.rx_fifo_errors;
6902
6903 for (i = 0; i < card->qdio.no_out_queues; i++) {
6904 queue = card->qdio.out_qs[i];
6905
6906 stats->tx_packets += queue->stats.tx_packets;
6907 stats->tx_bytes += queue->stats.tx_bytes;
6908 stats->tx_errors += queue->stats.tx_errors;
6909 stats->tx_dropped += queue->stats.tx_dropped;
6910 }
6911 }
6912 EXPORT_SYMBOL_GPL(qeth_get_stats64);
6913
6914 #define TC_IQD_UCAST 0
6915 static void qeth_iqd_set_prio_tc_map(struct net_device *dev,
6916 unsigned int ucast_txqs)
6917 {
6918 unsigned int prio;
6919
6920 /* IQD requires mcast traffic to be placed on a dedicated queue, and
6921 * qeth_iqd_select_queue() deals with this.
6922 * For unicast traffic, we defer the queue selection to the stack.
6923 * By installing a trivial prio map that spans over only the unicast
6924 * queues, we can encourage the stack to spread the ucast traffic evenly
6925 * without selecting the mcast queue.
6926 */
6927
6928 /* One traffic class, spanning over all active ucast queues: */
6929 netdev_set_num_tc(dev, 1);
6930 netdev_set_tc_queue(dev, TC_IQD_UCAST, ucast_txqs,
6931 QETH_IQD_MIN_UCAST_TXQ);
6932
6933 /* Map all priorities to this traffic class: */
6934 for (prio = 0; prio <= TC_BITMASK; prio++)
6935 netdev_set_prio_tc_map(dev, prio, TC_IQD_UCAST);
6936 }
6937
6938 int qeth_set_real_num_tx_queues(struct qeth_card *card, unsigned int count)
6939 {
6940 struct net_device *dev = card->dev;
6941 int rc;
6942
6943 /* Per netif_setup_tc(), adjust the mapping first: */
6944 if (IS_IQD(card))
6945 qeth_iqd_set_prio_tc_map(dev, count - 1);
6946
6947 rc = netif_set_real_num_tx_queues(dev, count);
6948
6949 if (rc && IS_IQD(card))
6950 qeth_iqd_set_prio_tc_map(dev, dev->real_num_tx_queues - 1);
6951
6952 return rc;
6953 }
6954 EXPORT_SYMBOL_GPL(qeth_set_real_num_tx_queues);
6955
6956 u16 qeth_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
6957 u8 cast_type, struct net_device *sb_dev)
6958 {
6959 u16 txq;
6960
6961 if (cast_type != RTN_UNICAST)
6962 return QETH_IQD_MCAST_TXQ;
6963 if (dev->real_num_tx_queues == QETH_IQD_MIN_TXQ)
6964 return QETH_IQD_MIN_UCAST_TXQ;
6965
6966 txq = netdev_pick_tx(dev, skb, sb_dev);
6967 return (txq == QETH_IQD_MCAST_TXQ) ? QETH_IQD_MIN_UCAST_TXQ : txq;
6968 }
6969 EXPORT_SYMBOL_GPL(qeth_iqd_select_queue);
6970
6971 int qeth_open(struct net_device *dev)
6972 {
6973 struct qeth_card *card = dev->ml_priv;
6974
6975 QETH_CARD_TEXT(card, 4, "qethopen");
6976
6977 card->data.state = CH_STATE_UP;
6978 netif_tx_start_all_queues(dev);
6979
6980 napi_enable(&card->napi);
6981 local_bh_disable();
6982 napi_schedule(&card->napi);
6983 if (IS_IQD(card)) {
6984 struct qeth_qdio_out_q *queue;
6985 unsigned int i;
6986
6987 qeth_for_each_output_queue(card, queue, i) {
6988 netif_tx_napi_add(dev, &queue->napi, qeth_tx_poll,
6989 QETH_NAPI_WEIGHT);
6990 napi_enable(&queue->napi);
6991 napi_schedule(&queue->napi);
6992 }
6993 }
6994 /* kick-start the NAPI softirq: */
6995 local_bh_enable();
6996 return 0;
6997 }
6998 EXPORT_SYMBOL_GPL(qeth_open);
6999
7000 int qeth_stop(struct net_device *dev)
7001 {
7002 struct qeth_card *card = dev->ml_priv;
7003
7004 QETH_CARD_TEXT(card, 4, "qethstop");
7005 if (IS_IQD(card)) {
7006 struct qeth_qdio_out_q *queue;
7007 unsigned int i;
7008
7009 /* Quiesce the NAPI instances: */
7010 qeth_for_each_output_queue(card, queue, i)
7011 napi_disable(&queue->napi);
7012
7013 /* Stop .ndo_start_xmit, might still access queue->napi. */
7014 netif_tx_disable(dev);
7015
7016 qeth_for_each_output_queue(card, queue, i) {
7017 del_timer_sync(&queue->timer);
7018 /* Queues may get re-allocated, so remove the NAPIs. */
7019 netif_napi_del(&queue->napi);
7020 }
7021 } else {
7022 netif_tx_disable(dev);
7023 }
7024
7025 napi_disable(&card->napi);
7026 cancel_delayed_work_sync(&card->buffer_reclaim_work);
7027 qdio_stop_irq(CARD_DDEV(card));
7028
7029 return 0;
7030 }
7031 EXPORT_SYMBOL_GPL(qeth_stop);
7032
7033 static int __init qeth_core_init(void)
7034 {
7035 int rc;
7036
7037 pr_info("loading core functions\n");
7038
7039 qeth_debugfs_root = debugfs_create_dir("qeth", NULL);
7040
7041 rc = qeth_register_dbf_views();
7042 if (rc)
7043 goto dbf_err;
7044 qeth_core_root_dev = root_device_register("qeth");
7045 rc = PTR_ERR_OR_ZERO(qeth_core_root_dev);
7046 if (rc)
7047 goto register_err;
7048 qeth_core_header_cache =
7049 kmem_cache_create("qeth_hdr", QETH_HDR_CACHE_OBJ_SIZE,
7050 roundup_pow_of_two(QETH_HDR_CACHE_OBJ_SIZE),
7051 0, NULL);
7052 if (!qeth_core_header_cache) {
7053 rc = -ENOMEM;
7054 goto slab_err;
7055 }
7056 qeth_qdio_outbuf_cache = kmem_cache_create("qeth_buf",
7057 sizeof(struct qeth_qdio_out_buffer), 0, 0, NULL);
7058 if (!qeth_qdio_outbuf_cache) {
7059 rc = -ENOMEM;
7060 goto cqslab_err;
7061 }
7062 rc = ccw_driver_register(&qeth_ccw_driver);
7063 if (rc)
7064 goto ccw_err;
7065 rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver);
7066 if (rc)
7067 goto ccwgroup_err;
7068
7069 return 0;
7070
7071 ccwgroup_err:
7072 ccw_driver_unregister(&qeth_ccw_driver);
7073 ccw_err:
7074 kmem_cache_destroy(qeth_qdio_outbuf_cache);
7075 cqslab_err:
7076 kmem_cache_destroy(qeth_core_header_cache);
7077 slab_err:
7078 root_device_unregister(qeth_core_root_dev);
7079 register_err:
7080 qeth_unregister_dbf_views();
7081 dbf_err:
7082 debugfs_remove_recursive(qeth_debugfs_root);
7083 pr_err("Initializing the qeth device driver failed\n");
7084 return rc;
7085 }
7086
7087 static void __exit qeth_core_exit(void)
7088 {
7089 qeth_clear_dbf_list();
7090 ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver);
7091 ccw_driver_unregister(&qeth_ccw_driver);
7092 kmem_cache_destroy(qeth_qdio_outbuf_cache);
7093 kmem_cache_destroy(qeth_core_header_cache);
7094 root_device_unregister(qeth_core_root_dev);
7095 qeth_unregister_dbf_views();
7096 debugfs_remove_recursive(qeth_debugfs_root);
7097 pr_info("core functions removed\n");
7098 }
7099
7100 module_init(qeth_core_init);
7101 module_exit(qeth_core_exit);
7102 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
7103 MODULE_DESCRIPTION("qeth core functions");
7104 MODULE_LICENSE("GPL");
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