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WIP FPC-III support
[linux/fpc-iii.git] / drivers / s390 / net / qeth_core_main.c
blobcf18d87da41e21cbd9e8fbd4703d3c8ed658ad21
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright IBM Corp. 2007, 2009
4 * Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
5 * Frank Pavlic <fpavlic@de.ibm.com>,
6 * Thomas Spatzier <tspat@de.ibm.com>,
7 * Frank Blaschka <frank.blaschka@de.ibm.com>
8 */
9
10 #define KMSG_COMPONENT "qeth"
11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
12
13 #include <linux/compat.h>
14 #include <linux/module.h>
15 #include <linux/moduleparam.h>
16 #include <linux/string.h>
17 #include <linux/errno.h>
18 #include <linux/kernel.h>
19 #include <linux/log2.h>
20 #include <linux/io.h>
21 #include <linux/ip.h>
22 #include <linux/tcp.h>
23 #include <linux/mii.h>
24 #include <linux/mm.h>
25 #include <linux/kthread.h>
26 #include <linux/slab.h>
27 #include <linux/if_vlan.h>
28 #include <linux/netdevice.h>
29 #include <linux/netdev_features.h>
30 #include <linux/rcutree.h>
31 #include <linux/skbuff.h>
32 #include <linux/vmalloc.h>
33
34 #include <net/iucv/af_iucv.h>
35 #include <net/dsfield.h>
36 #include <net/sock.h>
37
38 #include <asm/ebcdic.h>
39 #include <asm/chpid.h>
40 #include <asm/sysinfo.h>
41 #include <asm/diag.h>
42 #include <asm/cio.h>
43 #include <asm/ccwdev.h>
44 #include <asm/cpcmd.h>
45
46 #include "qeth_core.h"
47
48 struct qeth_dbf_info qeth_dbf[QETH_DBF_INFOS] = {
49 /* define dbf - Name, Pages, Areas, Maxlen, Level, View, Handle */
50 /* N P A M L V H */
51 [QETH_DBF_SETUP] = {"qeth_setup",
52 8, 1, 8, 5, &debug_hex_ascii_view, NULL},
53 [QETH_DBF_MSG] = {"qeth_msg", 8, 1, 11 * sizeof(long), 3,
54 &debug_sprintf_view, NULL},
55 [QETH_DBF_CTRL] = {"qeth_control",
56 8, 1, QETH_DBF_CTRL_LEN, 5, &debug_hex_ascii_view, NULL},
57 };
58 EXPORT_SYMBOL_GPL(qeth_dbf);
59
60 struct kmem_cache *qeth_core_header_cache;
61 EXPORT_SYMBOL_GPL(qeth_core_header_cache);
62 static struct kmem_cache *qeth_qdio_outbuf_cache;
63
64 static struct device *qeth_core_root_dev;
65 static struct dentry *qeth_debugfs_root;
66 static struct lock_class_key qdio_out_skb_queue_key;
67
68 static void qeth_issue_next_read_cb(struct qeth_card *card,
69 struct qeth_cmd_buffer *iob,
70 unsigned int data_length);
71 static int qeth_qdio_establish(struct qeth_card *);
72 static void qeth_free_qdio_queues(struct qeth_card *card);
73 static void qeth_notify_skbs(struct qeth_qdio_out_q *queue,
74 struct qeth_qdio_out_buffer *buf,
75 enum iucv_tx_notify notification);
76 static void qeth_tx_complete_buf(struct qeth_qdio_out_buffer *buf, bool error,
77 int budget);
78
79 static void qeth_close_dev_handler(struct work_struct *work)
80 {
81 struct qeth_card *card;
82
83 card = container_of(work, struct qeth_card, close_dev_work);
84 QETH_CARD_TEXT(card, 2, "cldevhdl");
85 ccwgroup_set_offline(card->gdev);
86 }
87
88 static const char *qeth_get_cardname(struct qeth_card *card)
89 {
90 if (IS_VM_NIC(card)) {
91 switch (card->info.type) {
92 case QETH_CARD_TYPE_OSD:
93 return " Virtual NIC QDIO";
94 case QETH_CARD_TYPE_IQD:
95 return " Virtual NIC Hiper";
96 case QETH_CARD_TYPE_OSM:
97 return " Virtual NIC QDIO - OSM";
98 case QETH_CARD_TYPE_OSX:
99 return " Virtual NIC QDIO - OSX";
100 default:
101 return " unknown";
102 }
103 } else {
104 switch (card->info.type) {
105 case QETH_CARD_TYPE_OSD:
106 return " OSD Express";
107 case QETH_CARD_TYPE_IQD:
108 return " HiperSockets";
109 case QETH_CARD_TYPE_OSN:
110 return " OSN QDIO";
111 case QETH_CARD_TYPE_OSM:
112 return " OSM QDIO";
113 case QETH_CARD_TYPE_OSX:
114 return " OSX QDIO";
115 default:
116 return " unknown";
117 }
118 }
119 return " n/a";
120 }
121
122 /* max length to be returned: 14 */
123 const char *qeth_get_cardname_short(struct qeth_card *card)
124 {
125 if (IS_VM_NIC(card)) {
126 switch (card->info.type) {
127 case QETH_CARD_TYPE_OSD:
128 return "Virt.NIC QDIO";
129 case QETH_CARD_TYPE_IQD:
130 return "Virt.NIC Hiper";
131 case QETH_CARD_TYPE_OSM:
132 return "Virt.NIC OSM";
133 case QETH_CARD_TYPE_OSX:
134 return "Virt.NIC OSX";
135 default:
136 return "unknown";
137 }
138 } else {
139 switch (card->info.type) {
140 case QETH_CARD_TYPE_OSD:
141 switch (card->info.link_type) {
142 case QETH_LINK_TYPE_FAST_ETH:
143 return "OSD_100";
144 case QETH_LINK_TYPE_HSTR:
145 return "HSTR";
146 case QETH_LINK_TYPE_GBIT_ETH:
147 return "OSD_1000";
148 case QETH_LINK_TYPE_10GBIT_ETH:
149 return "OSD_10GIG";
150 case QETH_LINK_TYPE_25GBIT_ETH:
151 return "OSD_25GIG";
152 case QETH_LINK_TYPE_LANE_ETH100:
153 return "OSD_FE_LANE";
154 case QETH_LINK_TYPE_LANE_TR:
155 return "OSD_TR_LANE";
156 case QETH_LINK_TYPE_LANE_ETH1000:
157 return "OSD_GbE_LANE";
158 case QETH_LINK_TYPE_LANE:
159 return "OSD_ATM_LANE";
160 default:
161 return "OSD_Express";
162 }
163 case QETH_CARD_TYPE_IQD:
164 return "HiperSockets";
165 case QETH_CARD_TYPE_OSN:
166 return "OSN";
167 case QETH_CARD_TYPE_OSM:
168 return "OSM_1000";
169 case QETH_CARD_TYPE_OSX:
170 return "OSX_10GIG";
171 default:
172 return "unknown";
173 }
174 }
175 return "n/a";
176 }
177
178 void qeth_set_allowed_threads(struct qeth_card *card, unsigned long threads,
179 int clear_start_mask)
180 {
181 unsigned long flags;
182
183 spin_lock_irqsave(&card->thread_mask_lock, flags);
184 card->thread_allowed_mask = threads;
185 if (clear_start_mask)
186 card->thread_start_mask &= threads;
187 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
188 wake_up(&card->wait_q);
189 }
190 EXPORT_SYMBOL_GPL(qeth_set_allowed_threads);
191
192 int qeth_threads_running(struct qeth_card *card, unsigned long threads)
193 {
194 unsigned long flags;
195 int rc = 0;
196
197 spin_lock_irqsave(&card->thread_mask_lock, flags);
198 rc = (card->thread_running_mask & threads);
199 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
200 return rc;
201 }
202 EXPORT_SYMBOL_GPL(qeth_threads_running);
203
204 static void qeth_clear_working_pool_list(struct qeth_card *card)
205 {
206 struct qeth_buffer_pool_entry *pool_entry, *tmp;
207 struct qeth_qdio_q *queue = card->qdio.in_q;
208 unsigned int i;
209
210 QETH_CARD_TEXT(card, 5, "clwrklst");
211 list_for_each_entry_safe(pool_entry, tmp,
212 &card->qdio.in_buf_pool.entry_list, list)
213 list_del(&pool_entry->list);
214
215 for (i = 0; i < ARRAY_SIZE(queue->bufs); i++)
216 queue->bufs[i].pool_entry = NULL;
217 }
218
219 static void qeth_free_pool_entry(struct qeth_buffer_pool_entry *entry)
220 {
221 unsigned int i;
222
223 for (i = 0; i < ARRAY_SIZE(entry->elements); i++) {
224 if (entry->elements[i])
225 __free_page(entry->elements[i]);
226 }
227
228 kfree(entry);
229 }
230
231 static void qeth_free_buffer_pool(struct qeth_card *card)
232 {
233 struct qeth_buffer_pool_entry *entry, *tmp;
234
235 list_for_each_entry_safe(entry, tmp, &card->qdio.init_pool.entry_list,
236 init_list) {
237 list_del(&entry->init_list);
238 qeth_free_pool_entry(entry);
239 }
240 }
241
242 static struct qeth_buffer_pool_entry *qeth_alloc_pool_entry(unsigned int pages)
243 {
244 struct qeth_buffer_pool_entry *entry;
245 unsigned int i;
246
247 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
248 if (!entry)
249 return NULL;
250
251 for (i = 0; i < pages; i++) {
252 entry->elements[i] = __dev_alloc_page(GFP_KERNEL);
253
254 if (!entry->elements[i]) {
255 qeth_free_pool_entry(entry);
256 return NULL;
257 }
258 }
259
260 return entry;
261 }
262
263 static int qeth_alloc_buffer_pool(struct qeth_card *card)
264 {
265 unsigned int buf_elements = QETH_MAX_BUFFER_ELEMENTS(card);
266 unsigned int i;
267
268 QETH_CARD_TEXT(card, 5, "alocpool");
269 for (i = 0; i < card->qdio.init_pool.buf_count; ++i) {
270 struct qeth_buffer_pool_entry *entry;
271
272 entry = qeth_alloc_pool_entry(buf_elements);
273 if (!entry) {
274 qeth_free_buffer_pool(card);
275 return -ENOMEM;
276 }
277
278 list_add(&entry->init_list, &card->qdio.init_pool.entry_list);
279 }
280 return 0;
281 }
282
283 int qeth_resize_buffer_pool(struct qeth_card *card, unsigned int count)
284 {
285 unsigned int buf_elements = QETH_MAX_BUFFER_ELEMENTS(card);
286 struct qeth_qdio_buffer_pool *pool = &card->qdio.init_pool;
287 struct qeth_buffer_pool_entry *entry, *tmp;
288 int delta = count - pool->buf_count;
289 LIST_HEAD(entries);
290
291 QETH_CARD_TEXT(card, 2, "realcbp");
292
293 /* Defer until queue is allocated: */
294 if (!card->qdio.in_q)
295 goto out;
296
297 /* Remove entries from the pool: */
298 while (delta < 0) {
299 entry = list_first_entry(&pool->entry_list,
300 struct qeth_buffer_pool_entry,
301 init_list);
302 list_del(&entry->init_list);
303 qeth_free_pool_entry(entry);
304
305 delta++;
306 }
307
308 /* Allocate additional entries: */
309 while (delta > 0) {
310 entry = qeth_alloc_pool_entry(buf_elements);
311 if (!entry) {
312 list_for_each_entry_safe(entry, tmp, &entries,
313 init_list) {
314 list_del(&entry->init_list);
315 qeth_free_pool_entry(entry);
316 }
317
318 return -ENOMEM;
319 }
320
321 list_add(&entry->init_list, &entries);
322
323 delta--;
324 }
325
326 list_splice(&entries, &pool->entry_list);
327
328 out:
329 card->qdio.in_buf_pool.buf_count = count;
330 pool->buf_count = count;
331 return 0;
332 }
333 EXPORT_SYMBOL_GPL(qeth_resize_buffer_pool);
334
335 static void qeth_free_qdio_queue(struct qeth_qdio_q *q)
336 {
337 if (!q)
338 return;
339
340 qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
341 kfree(q);
342 }
343
344 static struct qeth_qdio_q *qeth_alloc_qdio_queue(void)
345 {
346 struct qeth_qdio_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
347 int i;
348
349 if (!q)
350 return NULL;
351
352 if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
353 kfree(q);
354 return NULL;
355 }
356
357 for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i)
358 q->bufs[i].buffer = q->qdio_bufs[i];
359
360 QETH_DBF_HEX(SETUP, 2, &q, sizeof(void *));
361 return q;
362 }
363
364 static int qeth_cq_init(struct qeth_card *card)
365 {
366 int rc;
367
368 if (card->options.cq == QETH_CQ_ENABLED) {
369 QETH_CARD_TEXT(card, 2, "cqinit");
370 qdio_reset_buffers(card->qdio.c_q->qdio_bufs,
371 QDIO_MAX_BUFFERS_PER_Q);
372 card->qdio.c_q->next_buf_to_init = 127;
373 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT,
374 card->qdio.no_in_queues - 1, 0,
375 127);
376 if (rc) {
377 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
378 goto out;
379 }
380 }
381 rc = 0;
382 out:
383 return rc;
384 }
385
386 static int qeth_alloc_cq(struct qeth_card *card)
387 {
388 int rc;
389
390 if (card->options.cq == QETH_CQ_ENABLED) {
391 int i;
392 struct qdio_outbuf_state *outbuf_states;
393
394 QETH_CARD_TEXT(card, 2, "cqon");
395 card->qdio.c_q = qeth_alloc_qdio_queue();
396 if (!card->qdio.c_q) {
397 rc = -1;
398 goto kmsg_out;
399 }
400 card->qdio.no_in_queues = 2;
401 card->qdio.out_bufstates =
402 kcalloc(card->qdio.no_out_queues *
403 QDIO_MAX_BUFFERS_PER_Q,
404 sizeof(struct qdio_outbuf_state),
405 GFP_KERNEL);
406 outbuf_states = card->qdio.out_bufstates;
407 if (outbuf_states == NULL) {
408 rc = -1;
409 goto free_cq_out;
410 }
411 for (i = 0; i < card->qdio.no_out_queues; ++i) {
412 card->qdio.out_qs[i]->bufstates = outbuf_states;
413 outbuf_states += QDIO_MAX_BUFFERS_PER_Q;
414 }
415 } else {
416 QETH_CARD_TEXT(card, 2, "nocq");
417 card->qdio.c_q = NULL;
418 card->qdio.no_in_queues = 1;
419 }
420 QETH_CARD_TEXT_(card, 2, "iqc%d", card->qdio.no_in_queues);
421 rc = 0;
422 out:
423 return rc;
424 free_cq_out:
425 qeth_free_qdio_queue(card->qdio.c_q);
426 card->qdio.c_q = NULL;
427 kmsg_out:
428 dev_err(&card->gdev->dev, "Failed to create completion queue\n");
429 goto out;
430 }
431
432 static void qeth_free_cq(struct qeth_card *card)
433 {
434 if (card->qdio.c_q) {
435 --card->qdio.no_in_queues;
436 qeth_free_qdio_queue(card->qdio.c_q);
437 card->qdio.c_q = NULL;
438 }
439 kfree(card->qdio.out_bufstates);
440 card->qdio.out_bufstates = NULL;
441 }
442
443 static enum iucv_tx_notify qeth_compute_cq_notification(int sbalf15,
444 int delayed)
445 {
446 enum iucv_tx_notify n;
447
448 switch (sbalf15) {
449 case 0:
450 n = delayed ? TX_NOTIFY_DELAYED_OK : TX_NOTIFY_OK;
451 break;
452 case 4:
453 case 16:
454 case 17:
455 case 18:
456 n = delayed ? TX_NOTIFY_DELAYED_UNREACHABLE :
457 TX_NOTIFY_UNREACHABLE;
458 break;
459 default:
460 n = delayed ? TX_NOTIFY_DELAYED_GENERALERROR :
461 TX_NOTIFY_GENERALERROR;
462 break;
463 }
464
465 return n;
466 }
467
468 static void qeth_cleanup_handled_pending(struct qeth_qdio_out_q *q, int bidx,
469 int forced_cleanup)
470 {
471 if (q->card->options.cq != QETH_CQ_ENABLED)
472 return;
473
474 if (q->bufs[bidx]->next_pending != NULL) {
475 struct qeth_qdio_out_buffer *head = q->bufs[bidx];
476 struct qeth_qdio_out_buffer *c = q->bufs[bidx]->next_pending;
477
478 while (c) {
479 if (forced_cleanup ||
480 atomic_read(&c->state) == QETH_QDIO_BUF_EMPTY) {
481 struct qeth_qdio_out_buffer *f = c;
482
483 QETH_CARD_TEXT(f->q->card, 5, "fp");
484 QETH_CARD_TEXT_(f->q->card, 5, "%lx", (long) f);
485 /* release here to avoid interleaving between
486 outbound tasklet and inbound tasklet
487 regarding notifications and lifecycle */
488 qeth_tx_complete_buf(c, forced_cleanup, 0);
489
490 c = f->next_pending;
491 WARN_ON_ONCE(head->next_pending != f);
492 head->next_pending = c;
493 kmem_cache_free(qeth_qdio_outbuf_cache, f);
494 } else {
495 head = c;
496 c = c->next_pending;
497 }
498
499 }
500 }
501 }
502
503 static void qeth_qdio_handle_aob(struct qeth_card *card,
504 unsigned long phys_aob_addr)
505 {
506 enum qeth_qdio_out_buffer_state new_state = QETH_QDIO_BUF_QAOB_OK;
507 struct qaob *aob;
508 struct qeth_qdio_out_buffer *buffer;
509 enum iucv_tx_notify notification;
510 unsigned int i;
511
512 aob = (struct qaob *) phys_to_virt(phys_aob_addr);
513 QETH_CARD_TEXT(card, 5, "haob");
514 QETH_CARD_TEXT_(card, 5, "%lx", phys_aob_addr);
515 buffer = (struct qeth_qdio_out_buffer *) aob->user1;
516 QETH_CARD_TEXT_(card, 5, "%lx", aob->user1);
517
518 if (aob->aorc) {
519 QETH_CARD_TEXT_(card, 2, "aorc%02X", aob->aorc);
520 new_state = QETH_QDIO_BUF_QAOB_ERROR;
521 }
522
523 switch (atomic_xchg(&buffer->state, new_state)) {
524 case QETH_QDIO_BUF_PRIMED:
525 /* Faster than TX completion code, let it handle the async
526 * completion for us.
527 */
528 break;
529 case QETH_QDIO_BUF_PENDING:
530 /* TX completion code is active and will handle the async
531 * completion for us.
532 */
533 break;
534 case QETH_QDIO_BUF_NEED_QAOB:
535 /* TX completion code is already finished. */
536 notification = qeth_compute_cq_notification(aob->aorc, 1);
537 qeth_notify_skbs(buffer->q, buffer, notification);
538
539 /* Free dangling allocations. The attached skbs are handled by
540 * qeth_cleanup_handled_pending().
541 */
542 for (i = 0;
543 i < aob->sb_count && i < QETH_MAX_BUFFER_ELEMENTS(card);
544 i++) {
545 void *data = phys_to_virt(aob->sba[i]);
546
547 if (data && buffer->is_header[i])
548 kmem_cache_free(qeth_core_header_cache, data);
549 buffer->is_header[i] = 0;
550 }
551
552 atomic_set(&buffer->state, QETH_QDIO_BUF_EMPTY);
553 break;
554 default:
555 WARN_ON_ONCE(1);
556 }
557
558 qdio_release_aob(aob);
559 }
560
561 static void qeth_setup_ccw(struct ccw1 *ccw, u8 cmd_code, u8 flags, u32 len,
562 void *data)
563 {
564 ccw->cmd_code = cmd_code;
565 ccw->flags = flags | CCW_FLAG_SLI;
566 ccw->count = len;
567 ccw->cda = (__u32) __pa(data);
568 }
569
570 static int __qeth_issue_next_read(struct qeth_card *card)
571 {
572 struct qeth_cmd_buffer *iob = card->read_cmd;
573 struct qeth_channel *channel = iob->channel;
574 struct ccw1 *ccw = __ccw_from_cmd(iob);
575 int rc;
576
577 QETH_CARD_TEXT(card, 5, "issnxrd");
578 if (channel->state != CH_STATE_UP)
579 return -EIO;
580
581 memset(iob->data, 0, iob->length);
582 qeth_setup_ccw(ccw, CCW_CMD_READ, 0, iob->length, iob->data);
583 iob->callback = qeth_issue_next_read_cb;
584 /* keep the cmd alive after completion: */
585 qeth_get_cmd(iob);
586
587 QETH_CARD_TEXT(card, 6, "noirqpnd");
588 rc = ccw_device_start(channel->ccwdev, ccw, (addr_t) iob, 0, 0);
589 if (!rc) {
590 channel->active_cmd = iob;
591 } else {
592 QETH_DBF_MESSAGE(2, "error %i on device %x when starting next read ccw!\n",
593 rc, CARD_DEVID(card));
594 qeth_unlock_channel(card, channel);
595 qeth_put_cmd(iob);
596 card->read_or_write_problem = 1;
597 qeth_schedule_recovery(card);
598 }
599 return rc;
600 }
601
602 static int qeth_issue_next_read(struct qeth_card *card)
603 {
604 int ret;
605
606 spin_lock_irq(get_ccwdev_lock(CARD_RDEV(card)));
607 ret = __qeth_issue_next_read(card);
608 spin_unlock_irq(get_ccwdev_lock(CARD_RDEV(card)));
609
610 return ret;
611 }
612
613 static void qeth_enqueue_cmd(struct qeth_card *card,
614 struct qeth_cmd_buffer *iob)
615 {
616 spin_lock_irq(&card->lock);
617 list_add_tail(&iob->list_entry, &card->cmd_waiter_list);
618 spin_unlock_irq(&card->lock);
619 }
620
621 static void qeth_dequeue_cmd(struct qeth_card *card,
622 struct qeth_cmd_buffer *iob)
623 {
624 spin_lock_irq(&card->lock);
625 list_del(&iob->list_entry);
626 spin_unlock_irq(&card->lock);
627 }
628
629 void qeth_notify_cmd(struct qeth_cmd_buffer *iob, int reason)
630 {
631 iob->rc = reason;
632 complete(&iob->done);
633 }
634 EXPORT_SYMBOL_GPL(qeth_notify_cmd);
635
636 static void qeth_flush_local_addrs4(struct qeth_card *card)
637 {
638 struct qeth_local_addr *addr;
639 struct hlist_node *tmp;
640 unsigned int i;
641
642 spin_lock_irq(&card->local_addrs4_lock);
643 hash_for_each_safe(card->local_addrs4, i, tmp, addr, hnode) {
644 hash_del_rcu(&addr->hnode);
645 kfree_rcu(addr, rcu);
646 }
647 spin_unlock_irq(&card->local_addrs4_lock);
648 }
649
650 static void qeth_flush_local_addrs6(struct qeth_card *card)
651 {
652 struct qeth_local_addr *addr;
653 struct hlist_node *tmp;
654 unsigned int i;
655
656 spin_lock_irq(&card->local_addrs6_lock);
657 hash_for_each_safe(card->local_addrs6, i, tmp, addr, hnode) {
658 hash_del_rcu(&addr->hnode);
659 kfree_rcu(addr, rcu);
660 }
661 spin_unlock_irq(&card->local_addrs6_lock);
662 }
663
664 static void qeth_flush_local_addrs(struct qeth_card *card)
665 {
666 qeth_flush_local_addrs4(card);
667 qeth_flush_local_addrs6(card);
668 }
669
670 static void qeth_add_local_addrs4(struct qeth_card *card,
671 struct qeth_ipacmd_local_addrs4 *cmd)
672 {
673 unsigned int i;
674
675 if (cmd->addr_length !=
676 sizeof_field(struct qeth_ipacmd_local_addr4, addr)) {
677 dev_err_ratelimited(&card->gdev->dev,
678 "Dropped IPv4 ADD LOCAL ADDR event with bad length %u\n",
679 cmd->addr_length);
680 return;
681 }
682
683 spin_lock(&card->local_addrs4_lock);
684 for (i = 0; i < cmd->count; i++) {
685 unsigned int key = ipv4_addr_hash(cmd->addrs[i].addr);
686 struct qeth_local_addr *addr;
687 bool duplicate = false;
688
689 hash_for_each_possible(card->local_addrs4, addr, hnode, key) {
690 if (addr->addr.s6_addr32[3] == cmd->addrs[i].addr) {
691 duplicate = true;
692 break;
693 }
694 }
695
696 if (duplicate)
697 continue;
698
699 addr = kmalloc(sizeof(*addr), GFP_ATOMIC);
700 if (!addr) {
701 dev_err(&card->gdev->dev,
702 "Failed to allocate local addr object. Traffic to %pI4 might suffer.\n",
703 &cmd->addrs[i].addr);
704 continue;
705 }
706
707 ipv6_addr_set(&addr->addr, 0, 0, 0, cmd->addrs[i].addr);
708 hash_add_rcu(card->local_addrs4, &addr->hnode, key);
709 }
710 spin_unlock(&card->local_addrs4_lock);
711 }
712
713 static void qeth_add_local_addrs6(struct qeth_card *card,
714 struct qeth_ipacmd_local_addrs6 *cmd)
715 {
716 unsigned int i;
717
718 if (cmd->addr_length !=
719 sizeof_field(struct qeth_ipacmd_local_addr6, addr)) {
720 dev_err_ratelimited(&card->gdev->dev,
721 "Dropped IPv6 ADD LOCAL ADDR event with bad length %u\n",
722 cmd->addr_length);
723 return;
724 }
725
726 spin_lock(&card->local_addrs6_lock);
727 for (i = 0; i < cmd->count; i++) {
728 u32 key = ipv6_addr_hash(&cmd->addrs[i].addr);
729 struct qeth_local_addr *addr;
730 bool duplicate = false;
731
732 hash_for_each_possible(card->local_addrs6, addr, hnode, key) {
733 if (ipv6_addr_equal(&addr->addr, &cmd->addrs[i].addr)) {
734 duplicate = true;
735 break;
736 }
737 }
738
739 if (duplicate)
740 continue;
741
742 addr = kmalloc(sizeof(*addr), GFP_ATOMIC);
743 if (!addr) {
744 dev_err(&card->gdev->dev,
745 "Failed to allocate local addr object. Traffic to %pI6c might suffer.\n",
746 &cmd->addrs[i].addr);
747 continue;
748 }
749
750 addr->addr = cmd->addrs[i].addr;
751 hash_add_rcu(card->local_addrs6, &addr->hnode, key);
752 }
753 spin_unlock(&card->local_addrs6_lock);
754 }
755
756 static void qeth_del_local_addrs4(struct qeth_card *card,
757 struct qeth_ipacmd_local_addrs4 *cmd)
758 {
759 unsigned int i;
760
761 if (cmd->addr_length !=
762 sizeof_field(struct qeth_ipacmd_local_addr4, addr)) {
763 dev_err_ratelimited(&card->gdev->dev,
764 "Dropped IPv4 DEL LOCAL ADDR event with bad length %u\n",
765 cmd->addr_length);
766 return;
767 }
768
769 spin_lock(&card->local_addrs4_lock);
770 for (i = 0; i < cmd->count; i++) {
771 struct qeth_ipacmd_local_addr4 *addr = &cmd->addrs[i];
772 unsigned int key = ipv4_addr_hash(addr->addr);
773 struct qeth_local_addr *tmp;
774
775 hash_for_each_possible(card->local_addrs4, tmp, hnode, key) {
776 if (tmp->addr.s6_addr32[3] == addr->addr) {
777 hash_del_rcu(&tmp->hnode);
778 kfree_rcu(tmp, rcu);
779 break;
780 }
781 }
782 }
783 spin_unlock(&card->local_addrs4_lock);
784 }
785
786 static void qeth_del_local_addrs6(struct qeth_card *card,
787 struct qeth_ipacmd_local_addrs6 *cmd)
788 {
789 unsigned int i;
790
791 if (cmd->addr_length !=
792 sizeof_field(struct qeth_ipacmd_local_addr6, addr)) {
793 dev_err_ratelimited(&card->gdev->dev,
794 "Dropped IPv6 DEL LOCAL ADDR event with bad length %u\n",
795 cmd->addr_length);
796 return;
797 }
798
799 spin_lock(&card->local_addrs6_lock);
800 for (i = 0; i < cmd->count; i++) {
801 struct qeth_ipacmd_local_addr6 *addr = &cmd->addrs[i];
802 u32 key = ipv6_addr_hash(&addr->addr);
803 struct qeth_local_addr *tmp;
804
805 hash_for_each_possible(card->local_addrs6, tmp, hnode, key) {
806 if (ipv6_addr_equal(&tmp->addr, &addr->addr)) {
807 hash_del_rcu(&tmp->hnode);
808 kfree_rcu(tmp, rcu);
809 break;
810 }
811 }
812 }
813 spin_unlock(&card->local_addrs6_lock);
814 }
815
816 static bool qeth_next_hop_is_local_v4(struct qeth_card *card,
817 struct sk_buff *skb)
818 {
819 struct qeth_local_addr *tmp;
820 bool is_local = false;
821 unsigned int key;
822 __be32 next_hop;
823
824 if (hash_empty(card->local_addrs4))
825 return false;
826
827 rcu_read_lock();
828 next_hop = qeth_next_hop_v4_rcu(skb, qeth_dst_check_rcu(skb, 4));
829 key = ipv4_addr_hash(next_hop);
830
831 hash_for_each_possible_rcu(card->local_addrs4, tmp, hnode, key) {
832 if (tmp->addr.s6_addr32[3] == next_hop) {
833 is_local = true;
834 break;
835 }
836 }
837 rcu_read_unlock();
838
839 return is_local;
840 }
841
842 static bool qeth_next_hop_is_local_v6(struct qeth_card *card,
843 struct sk_buff *skb)
844 {
845 struct qeth_local_addr *tmp;
846 struct in6_addr *next_hop;
847 bool is_local = false;
848 u32 key;
849
850 if (hash_empty(card->local_addrs6))
851 return false;
852
853 rcu_read_lock();
854 next_hop = qeth_next_hop_v6_rcu(skb, qeth_dst_check_rcu(skb, 6));
855 key = ipv6_addr_hash(next_hop);
856
857 hash_for_each_possible_rcu(card->local_addrs6, tmp, hnode, key) {
858 if (ipv6_addr_equal(&tmp->addr, next_hop)) {
859 is_local = true;
860 break;
861 }
862 }
863 rcu_read_unlock();
864
865 return is_local;
866 }
867
868 static int qeth_debugfs_local_addr_show(struct seq_file *m, void *v)
869 {
870 struct qeth_card *card = m->private;
871 struct qeth_local_addr *tmp;
872 unsigned int i;
873
874 rcu_read_lock();
875 hash_for_each_rcu(card->local_addrs4, i, tmp, hnode)
876 seq_printf(m, "%pI4\n", &tmp->addr.s6_addr32[3]);
877 hash_for_each_rcu(card->local_addrs6, i, tmp, hnode)
878 seq_printf(m, "%pI6c\n", &tmp->addr);
879 rcu_read_unlock();
880
881 return 0;
882 }
883
884 DEFINE_SHOW_ATTRIBUTE(qeth_debugfs_local_addr);
885
886 static void qeth_issue_ipa_msg(struct qeth_ipa_cmd *cmd, int rc,
887 struct qeth_card *card)
888 {
889 const char *ipa_name;
890 int com = cmd->hdr.command;
891
892 ipa_name = qeth_get_ipa_cmd_name(com);
893
894 if (rc)
895 QETH_DBF_MESSAGE(2, "IPA: %s(%#x) for device %x returned %#x \"%s\"\n",
896 ipa_name, com, CARD_DEVID(card), rc,
897 qeth_get_ipa_msg(rc));
898 else
899 QETH_DBF_MESSAGE(5, "IPA: %s(%#x) for device %x succeeded\n",
900 ipa_name, com, CARD_DEVID(card));
901 }
902
903 static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card,
904 struct qeth_ipa_cmd *cmd)
905 {
906 QETH_CARD_TEXT(card, 5, "chkipad");
907
908 if (IS_IPA_REPLY(cmd)) {
909 if (cmd->hdr.command != IPA_CMD_SETCCID &&
910 cmd->hdr.command != IPA_CMD_DELCCID &&
911 cmd->hdr.command != IPA_CMD_MODCCID &&
912 cmd->hdr.command != IPA_CMD_SET_DIAG_ASS)
913 qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
914 return cmd;
915 }
916
917 /* handle unsolicited event: */
918 switch (cmd->hdr.command) {
919 case IPA_CMD_STOPLAN:
920 if (cmd->hdr.return_code == IPA_RC_VEPA_TO_VEB_TRANSITION) {
921 dev_err(&card->gdev->dev,
922 "Interface %s is down because the adjacent port is no longer in reflective relay mode\n",
923 netdev_name(card->dev));
924 schedule_work(&card->close_dev_work);
925 } else {
926 dev_warn(&card->gdev->dev,
927 "The link for interface %s on CHPID 0x%X failed\n",
928 netdev_name(card->dev), card->info.chpid);
929 qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
930 netif_carrier_off(card->dev);
931 }
932 return NULL;
933 case IPA_CMD_STARTLAN:
934 dev_info(&card->gdev->dev,
935 "The link for %s on CHPID 0x%X has been restored\n",
936 netdev_name(card->dev), card->info.chpid);
937 if (card->info.hwtrap)
938 card->info.hwtrap = 2;
939 qeth_schedule_recovery(card);
940 return NULL;
941 case IPA_CMD_SETBRIDGEPORT_IQD:
942 case IPA_CMD_SETBRIDGEPORT_OSA:
943 case IPA_CMD_ADDRESS_CHANGE_NOTIF:
944 if (card->discipline->control_event_handler(card, cmd))
945 return cmd;
946 return NULL;
947 case IPA_CMD_MODCCID:
948 return cmd;
949 case IPA_CMD_REGISTER_LOCAL_ADDR:
950 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
951 qeth_add_local_addrs4(card, &cmd->data.local_addrs4);
952 else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
953 qeth_add_local_addrs6(card, &cmd->data.local_addrs6);
954
955 QETH_CARD_TEXT(card, 3, "irla");
956 return NULL;
957 case IPA_CMD_UNREGISTER_LOCAL_ADDR:
958 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
959 qeth_del_local_addrs4(card, &cmd->data.local_addrs4);
960 else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
961 qeth_del_local_addrs6(card, &cmd->data.local_addrs6);
962
963 QETH_CARD_TEXT(card, 3, "urla");
964 return NULL;
965 default:
966 QETH_DBF_MESSAGE(2, "Received data is IPA but not a reply!\n");
967 return cmd;
968 }
969 }
970
971 static void qeth_clear_ipacmd_list(struct qeth_card *card)
972 {
973 struct qeth_cmd_buffer *iob;
974 unsigned long flags;
975
976 QETH_CARD_TEXT(card, 4, "clipalst");
977
978 spin_lock_irqsave(&card->lock, flags);
979 list_for_each_entry(iob, &card->cmd_waiter_list, list_entry)
980 qeth_notify_cmd(iob, -ECANCELED);
981 spin_unlock_irqrestore(&card->lock, flags);
982 }
983
984 static int qeth_check_idx_response(struct qeth_card *card,
985 unsigned char *buffer)
986 {
987 QETH_DBF_HEX(CTRL, 2, buffer, QETH_DBF_CTRL_LEN);
988 if ((buffer[2] & QETH_IDX_TERMINATE_MASK) == QETH_IDX_TERMINATE) {
989 QETH_DBF_MESSAGE(2, "received an IDX TERMINATE with cause code %#04x\n",
990 buffer[4]);
991 QETH_CARD_TEXT(card, 2, "ckidxres");
992 QETH_CARD_TEXT(card, 2, " idxterm");
993 QETH_CARD_TEXT_(card, 2, "rc%x", buffer[4]);
994 if (buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT ||
995 buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT_VM) {
996 dev_err(&card->gdev->dev,
997 "The device does not support the configured transport mode\n");
998 return -EPROTONOSUPPORT;
999 }
1000 return -EIO;
1001 }
1002 return 0;
1003 }
1004
1005 void qeth_put_cmd(struct qeth_cmd_buffer *iob)
1006 {
1007 if (refcount_dec_and_test(&iob->ref_count)) {
1008 kfree(iob->data);
1009 kfree(iob);
1010 }
1011 }
1012 EXPORT_SYMBOL_GPL(qeth_put_cmd);
1013
1014 static void qeth_release_buffer_cb(struct qeth_card *card,
1015 struct qeth_cmd_buffer *iob,
1016 unsigned int data_length)
1017 {
1018 qeth_put_cmd(iob);
1019 }
1020
1021 static void qeth_cancel_cmd(struct qeth_cmd_buffer *iob, int rc)
1022 {
1023 qeth_notify_cmd(iob, rc);
1024 qeth_put_cmd(iob);
1025 }
1026
1027 struct qeth_cmd_buffer *qeth_alloc_cmd(struct qeth_channel *channel,
1028 unsigned int length, unsigned int ccws,
1029 long timeout)
1030 {
1031 struct qeth_cmd_buffer *iob;
1032
1033 if (length > QETH_BUFSIZE)
1034 return NULL;
1035
1036 iob = kzalloc(sizeof(*iob), GFP_KERNEL);
1037 if (!iob)
1038 return NULL;
1039
1040 iob->data = kzalloc(ALIGN(length, 8) + ccws * sizeof(struct ccw1),
1041 GFP_KERNEL | GFP_DMA);
1042 if (!iob->data) {
1043 kfree(iob);
1044 return NULL;
1045 }
1046
1047 init_completion(&iob->done);
1048 spin_lock_init(&iob->lock);
1049 refcount_set(&iob->ref_count, 1);
1050 iob->channel = channel;
1051 iob->timeout = timeout;
1052 iob->length = length;
1053 return iob;
1054 }
1055 EXPORT_SYMBOL_GPL(qeth_alloc_cmd);
1056
1057 static void qeth_issue_next_read_cb(struct qeth_card *card,
1058 struct qeth_cmd_buffer *iob,
1059 unsigned int data_length)
1060 {
1061 struct qeth_cmd_buffer *request = NULL;
1062 struct qeth_ipa_cmd *cmd = NULL;
1063 struct qeth_reply *reply = NULL;
1064 struct qeth_cmd_buffer *tmp;
1065 unsigned long flags;
1066 int rc = 0;
1067
1068 QETH_CARD_TEXT(card, 4, "sndctlcb");
1069 rc = qeth_check_idx_response(card, iob->data);
1070 switch (rc) {
1071 case 0:
1072 break;
1073 case -EIO:
1074 qeth_schedule_recovery(card);
1075 fallthrough;
1076 default:
1077 qeth_clear_ipacmd_list(card);
1078 goto err_idx;
1079 }
1080
1081 cmd = __ipa_reply(iob);
1082 if (cmd) {
1083 cmd = qeth_check_ipa_data(card, cmd);
1084 if (!cmd)
1085 goto out;
1086 if (IS_OSN(card) && card->osn_info.assist_cb &&
1087 cmd->hdr.command != IPA_CMD_STARTLAN) {
1088 card->osn_info.assist_cb(card->dev, cmd);
1089 goto out;
1090 }
1091 }
1092
1093 /* match against pending cmd requests */
1094 spin_lock_irqsave(&card->lock, flags);
1095 list_for_each_entry(tmp, &card->cmd_waiter_list, list_entry) {
1096 if (tmp->match && tmp->match(tmp, iob)) {
1097 request = tmp;
1098 /* take the object outside the lock */
1099 qeth_get_cmd(request);
1100 break;
1101 }
1102 }
1103 spin_unlock_irqrestore(&card->lock, flags);
1104
1105 if (!request)
1106 goto out;
1107
1108 reply = &request->reply;
1109 if (!reply->callback) {
1110 rc = 0;
1111 goto no_callback;
1112 }
1113
1114 spin_lock_irqsave(&request->lock, flags);
1115 if (request->rc)
1116 /* Bail out when the requestor has already left: */
1117 rc = request->rc;
1118 else
1119 rc = reply->callback(card, reply, cmd ? (unsigned long)cmd :
1120 (unsigned long)iob);
1121 spin_unlock_irqrestore(&request->lock, flags);
1122
1123 no_callback:
1124 if (rc <= 0)
1125 qeth_notify_cmd(request, rc);
1126 qeth_put_cmd(request);
1127 out:
1128 memcpy(&card->seqno.pdu_hdr_ack,
1129 QETH_PDU_HEADER_SEQ_NO(iob->data),
1130 QETH_SEQ_NO_LENGTH);
1131 __qeth_issue_next_read(card);
1132 err_idx:
1133 qeth_put_cmd(iob);
1134 }
1135
1136 static int qeth_set_thread_start_bit(struct qeth_card *card,
1137 unsigned long thread)
1138 {
1139 unsigned long flags;
1140 int rc = 0;
1141
1142 spin_lock_irqsave(&card->thread_mask_lock, flags);
1143 if (!(card->thread_allowed_mask & thread))
1144 rc = -EPERM;
1145 else if (card->thread_start_mask & thread)
1146 rc = -EBUSY;
1147 else
1148 card->thread_start_mask |= thread;
1149 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1150
1151 return rc;
1152 }
1153
1154 static void qeth_clear_thread_start_bit(struct qeth_card *card,
1155 unsigned long thread)
1156 {
1157 unsigned long flags;
1158
1159 spin_lock_irqsave(&card->thread_mask_lock, flags);
1160 card->thread_start_mask &= ~thread;
1161 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1162 wake_up(&card->wait_q);
1163 }
1164
1165 static void qeth_clear_thread_running_bit(struct qeth_card *card,
1166 unsigned long thread)
1167 {
1168 unsigned long flags;
1169
1170 spin_lock_irqsave(&card->thread_mask_lock, flags);
1171 card->thread_running_mask &= ~thread;
1172 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1173 wake_up_all(&card->wait_q);
1174 }
1175
1176 static int __qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
1177 {
1178 unsigned long flags;
1179 int rc = 0;
1180
1181 spin_lock_irqsave(&card->thread_mask_lock, flags);
1182 if (card->thread_start_mask & thread) {
1183 if ((card->thread_allowed_mask & thread) &&
1184 !(card->thread_running_mask & thread)) {
1185 rc = 1;
1186 card->thread_start_mask &= ~thread;
1187 card->thread_running_mask |= thread;
1188 } else
1189 rc = -EPERM;
1190 }
1191 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1192 return rc;
1193 }
1194
1195 static int qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
1196 {
1197 int rc = 0;
1198
1199 wait_event(card->wait_q,
1200 (rc = __qeth_do_run_thread(card, thread)) >= 0);
1201 return rc;
1202 }
1203
1204 int qeth_schedule_recovery(struct qeth_card *card)
1205 {
1206 int rc;
1207
1208 QETH_CARD_TEXT(card, 2, "startrec");
1209
1210 rc = qeth_set_thread_start_bit(card, QETH_RECOVER_THREAD);
1211 if (!rc)
1212 schedule_work(&card->kernel_thread_starter);
1213
1214 return rc;
1215 }
1216
1217 static int qeth_get_problem(struct qeth_card *card, struct ccw_device *cdev,
1218 struct irb *irb)
1219 {
1220 int dstat, cstat;
1221 char *sense;
1222
1223 sense = (char *) irb->ecw;
1224 cstat = irb->scsw.cmd.cstat;
1225 dstat = irb->scsw.cmd.dstat;
1226
1227 if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK |
1228 SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK |
1229 SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) {
1230 QETH_CARD_TEXT(card, 2, "CGENCHK");
1231 dev_warn(&cdev->dev, "The qeth device driver "
1232 "failed to recover an error on the device\n");
1233 QETH_DBF_MESSAGE(2, "check on channel %x with dstat=%#x, cstat=%#x\n",
1234 CCW_DEVID(cdev), dstat, cstat);
1235 print_hex_dump(KERN_WARNING, "qeth: irb ", DUMP_PREFIX_OFFSET,
1236 16, 1, irb, 64, 1);
1237 return -EIO;
1238 }
1239
1240 if (dstat & DEV_STAT_UNIT_CHECK) {
1241 if (sense[SENSE_RESETTING_EVENT_BYTE] &
1242 SENSE_RESETTING_EVENT_FLAG) {
1243 QETH_CARD_TEXT(card, 2, "REVIND");
1244 return -EIO;
1245 }
1246 if (sense[SENSE_COMMAND_REJECT_BYTE] &
1247 SENSE_COMMAND_REJECT_FLAG) {
1248 QETH_CARD_TEXT(card, 2, "CMDREJi");
1249 return -EIO;
1250 }
1251 if ((sense[2] == 0xaf) && (sense[3] == 0xfe)) {
1252 QETH_CARD_TEXT(card, 2, "AFFE");
1253 return -EIO;
1254 }
1255 if ((!sense[0]) && (!sense[1]) && (!sense[2]) && (!sense[3])) {
1256 QETH_CARD_TEXT(card, 2, "ZEROSEN");
1257 return 0;
1258 }
1259 QETH_CARD_TEXT(card, 2, "DGENCHK");
1260 return -EIO;
1261 }
1262 return 0;
1263 }
1264
1265 static int qeth_check_irb_error(struct qeth_card *card, struct ccw_device *cdev,
1266 struct irb *irb)
1267 {
1268 if (!IS_ERR(irb))
1269 return 0;
1270
1271 switch (PTR_ERR(irb)) {
1272 case -EIO:
1273 QETH_DBF_MESSAGE(2, "i/o-error on channel %x\n",
1274 CCW_DEVID(cdev));
1275 QETH_CARD_TEXT(card, 2, "ckirberr");
1276 QETH_CARD_TEXT_(card, 2, " rc%d", -EIO);
1277 return -EIO;
1278 case -ETIMEDOUT:
1279 dev_warn(&cdev->dev, "A hardware operation timed out"
1280 " on the device\n");
1281 QETH_CARD_TEXT(card, 2, "ckirberr");
1282 QETH_CARD_TEXT_(card, 2, " rc%d", -ETIMEDOUT);
1283 return -ETIMEDOUT;
1284 default:
1285 QETH_DBF_MESSAGE(2, "unknown error %ld on channel %x\n",
1286 PTR_ERR(irb), CCW_DEVID(cdev));
1287 QETH_CARD_TEXT(card, 2, "ckirberr");
1288 QETH_CARD_TEXT(card, 2, " rc???");
1289 return PTR_ERR(irb);
1290 }
1291 }
1292
1293 static void qeth_irq(struct ccw_device *cdev, unsigned long intparm,
1294 struct irb *irb)
1295 {
1296 int rc;
1297 int cstat, dstat;
1298 struct qeth_cmd_buffer *iob = NULL;
1299 struct ccwgroup_device *gdev;
1300 struct qeth_channel *channel;
1301 struct qeth_card *card;
1302
1303 /* while we hold the ccwdev lock, this stays valid: */
1304 gdev = dev_get_drvdata(&cdev->dev);
1305 card = dev_get_drvdata(&gdev->dev);
1306
1307 QETH_CARD_TEXT(card, 5, "irq");
1308
1309 if (card->read.ccwdev == cdev) {
1310 channel = &card->read;
1311 QETH_CARD_TEXT(card, 5, "read");
1312 } else if (card->write.ccwdev == cdev) {
1313 channel = &card->write;
1314 QETH_CARD_TEXT(card, 5, "write");
1315 } else {
1316 channel = &card->data;
1317 QETH_CARD_TEXT(card, 5, "data");
1318 }
1319
1320 if (intparm == 0) {
1321 QETH_CARD_TEXT(card, 5, "irqunsol");
1322 } else if ((addr_t)intparm != (addr_t)channel->active_cmd) {
1323 QETH_CARD_TEXT(card, 5, "irqunexp");
1324
1325 dev_err(&cdev->dev,
1326 "Received IRQ with intparm %lx, expected %px\n",
1327 intparm, channel->active_cmd);
1328 if (channel->active_cmd)
1329 qeth_cancel_cmd(channel->active_cmd, -EIO);
1330 } else {
1331 iob = (struct qeth_cmd_buffer *) (addr_t)intparm;
1332 }
1333
1334 channel->active_cmd = NULL;
1335 qeth_unlock_channel(card, channel);
1336
1337 rc = qeth_check_irb_error(card, cdev, irb);
1338 if (rc) {
1339 /* IO was terminated, free its resources. */
1340 if (iob)
1341 qeth_cancel_cmd(iob, rc);
1342 return;
1343 }
1344
1345 if (irb->scsw.cmd.fctl & SCSW_FCTL_CLEAR_FUNC) {
1346 channel->state = CH_STATE_STOPPED;
1347 wake_up(&card->wait_q);
1348 }
1349
1350 if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) {
1351 channel->state = CH_STATE_HALTED;
1352 wake_up(&card->wait_q);
1353 }
1354
1355 if (iob && (irb->scsw.cmd.fctl & (SCSW_FCTL_CLEAR_FUNC |
1356 SCSW_FCTL_HALT_FUNC))) {
1357 qeth_cancel_cmd(iob, -ECANCELED);
1358 iob = NULL;
1359 }
1360
1361 cstat = irb->scsw.cmd.cstat;
1362 dstat = irb->scsw.cmd.dstat;
1363
1364 if ((dstat & DEV_STAT_UNIT_EXCEP) ||
1365 (dstat & DEV_STAT_UNIT_CHECK) ||
1366 (cstat)) {
1367 if (irb->esw.esw0.erw.cons) {
1368 dev_warn(&channel->ccwdev->dev,
1369 "The qeth device driver failed to recover "
1370 "an error on the device\n");
1371 QETH_DBF_MESSAGE(2, "sense data available on channel %x: cstat %#X dstat %#X\n",
1372 CCW_DEVID(channel->ccwdev), cstat,
1373 dstat);
1374 print_hex_dump(KERN_WARNING, "qeth: irb ",
1375 DUMP_PREFIX_OFFSET, 16, 1, irb, 32, 1);
1376 print_hex_dump(KERN_WARNING, "qeth: sense data ",
1377 DUMP_PREFIX_OFFSET, 16, 1, irb->ecw, 32, 1);
1378 }
1379
1380 rc = qeth_get_problem(card, cdev, irb);
1381 if (rc) {
1382 card->read_or_write_problem = 1;
1383 if (iob)
1384 qeth_cancel_cmd(iob, rc);
1385 qeth_clear_ipacmd_list(card);
1386 qeth_schedule_recovery(card);
1387 return;
1388 }
1389 }
1390
1391 if (iob) {
1392 /* sanity check: */
1393 if (irb->scsw.cmd.count > iob->length) {
1394 qeth_cancel_cmd(iob, -EIO);
1395 return;
1396 }
1397 if (iob->callback)
1398 iob->callback(card, iob,
1399 iob->length - irb->scsw.cmd.count);
1400 }
1401 }
1402
1403 static void qeth_notify_skbs(struct qeth_qdio_out_q *q,
1404 struct qeth_qdio_out_buffer *buf,
1405 enum iucv_tx_notify notification)
1406 {
1407 struct sk_buff *skb;
1408
1409 skb_queue_walk(&buf->skb_list, skb) {
1410 QETH_CARD_TEXT_(q->card, 5, "skbn%d", notification);
1411 QETH_CARD_TEXT_(q->card, 5, "%lx", (long) skb);
1412 if (skb->sk && skb->sk->sk_family == PF_IUCV)
1413 iucv_sk(skb->sk)->sk_txnotify(skb, notification);
1414 }
1415 }
1416
1417 static void qeth_tx_complete_buf(struct qeth_qdio_out_buffer *buf, bool error,
1418 int budget)
1419 {
1420 struct qeth_qdio_out_q *queue = buf->q;
1421 struct sk_buff *skb;
1422
1423 if (atomic_read(&buf->state) == QETH_QDIO_BUF_PENDING)
1424 qeth_notify_skbs(queue, buf, TX_NOTIFY_GENERALERROR);
1425
1426 /* Empty buffer? */
1427 if (buf->next_element_to_fill == 0)
1428 return;
1429
1430 QETH_TXQ_STAT_INC(queue, bufs);
1431 QETH_TXQ_STAT_ADD(queue, buf_elements, buf->next_element_to_fill);
1432 if (error) {
1433 QETH_TXQ_STAT_ADD(queue, tx_errors, buf->frames);
1434 } else {
1435 QETH_TXQ_STAT_ADD(queue, tx_packets, buf->frames);
1436 QETH_TXQ_STAT_ADD(queue, tx_bytes, buf->bytes);
1437 }
1438
1439 while ((skb = __skb_dequeue(&buf->skb_list)) != NULL) {
1440 unsigned int bytes = qdisc_pkt_len(skb);
1441 bool is_tso = skb_is_gso(skb);
1442 unsigned int packets;
1443
1444 packets = is_tso ? skb_shinfo(skb)->gso_segs : 1;
1445 if (!error) {
1446 if (skb->ip_summed == CHECKSUM_PARTIAL)
1447 QETH_TXQ_STAT_ADD(queue, skbs_csum, packets);
1448 if (skb_is_nonlinear(skb))
1449 QETH_TXQ_STAT_INC(queue, skbs_sg);
1450 if (is_tso) {
1451 QETH_TXQ_STAT_INC(queue, skbs_tso);
1452 QETH_TXQ_STAT_ADD(queue, tso_bytes, bytes);
1453 }
1454 }
1455
1456 napi_consume_skb(skb, budget);
1457 }
1458 }
1459
1460 static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
1461 struct qeth_qdio_out_buffer *buf,
1462 bool error, int budget)
1463 {
1464 int i;
1465
1466 /* is PCI flag set on buffer? */
1467 if (buf->buffer->element[0].sflags & SBAL_SFLAGS0_PCI_REQ)
1468 atomic_dec(&queue->set_pci_flags_count);
1469
1470 qeth_tx_complete_buf(buf, error, budget);
1471
1472 for (i = 0; i < queue->max_elements; ++i) {
1473 void *data = phys_to_virt(buf->buffer->element[i].addr);
1474
1475 if (data && buf->is_header[i])
1476 kmem_cache_free(qeth_core_header_cache, data);
1477 buf->is_header[i] = 0;
1478 }
1479
1480 qeth_scrub_qdio_buffer(buf->buffer, queue->max_elements);
1481 buf->next_element_to_fill = 0;
1482 buf->frames = 0;
1483 buf->bytes = 0;
1484 atomic_set(&buf->state, QETH_QDIO_BUF_EMPTY);
1485 }
1486
1487 static void qeth_drain_output_queue(struct qeth_qdio_out_q *q, bool free)
1488 {
1489 int j;
1490
1491 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
1492 if (!q->bufs[j])
1493 continue;
1494 qeth_cleanup_handled_pending(q, j, 1);
1495 qeth_clear_output_buffer(q, q->bufs[j], true, 0);
1496 if (free) {
1497 kmem_cache_free(qeth_qdio_outbuf_cache, q->bufs[j]);
1498 q->bufs[j] = NULL;
1499 }
1500 }
1501 }
1502
1503 static void qeth_drain_output_queues(struct qeth_card *card)
1504 {
1505 int i;
1506
1507 QETH_CARD_TEXT(card, 2, "clearqdbf");
1508 /* clear outbound buffers to free skbs */
1509 for (i = 0; i < card->qdio.no_out_queues; ++i) {
1510 if (card->qdio.out_qs[i])
1511 qeth_drain_output_queue(card->qdio.out_qs[i], false);
1512 }
1513 }
1514
1515 static void qeth_osa_set_output_queues(struct qeth_card *card, bool single)
1516 {
1517 unsigned int max = single ? 1 : card->dev->num_tx_queues;
1518
1519 if (card->qdio.no_out_queues == max)
1520 return;
1521
1522 if (atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED)
1523 qeth_free_qdio_queues(card);
1524
1525 if (max == 1 && card->qdio.do_prio_queueing != QETH_PRIOQ_DEFAULT)
1526 dev_info(&card->gdev->dev, "Priority Queueing not supported\n");
1527
1528 card->qdio.no_out_queues = max;
1529 }
1530
1531 static int qeth_update_from_chp_desc(struct qeth_card *card)
1532 {
1533 struct ccw_device *ccwdev;
1534 struct channel_path_desc_fmt0 *chp_dsc;
1535
1536 QETH_CARD_TEXT(card, 2, "chp_desc");
1537
1538 ccwdev = card->data.ccwdev;
1539 chp_dsc = ccw_device_get_chp_desc(ccwdev, 0);
1540 if (!chp_dsc)
1541 return -ENOMEM;
1542
1543 card->info.func_level = 0x4100 + chp_dsc->desc;
1544
1545 if (IS_OSD(card) || IS_OSX(card))
1546 /* CHPP field bit 6 == 1 -> single queue */
1547 qeth_osa_set_output_queues(card, chp_dsc->chpp & 0x02);
1548
1549 kfree(chp_dsc);
1550 QETH_CARD_TEXT_(card, 2, "nr:%x", card->qdio.no_out_queues);
1551 QETH_CARD_TEXT_(card, 2, "lvl:%02x", card->info.func_level);
1552 return 0;
1553 }
1554
1555 static void qeth_init_qdio_info(struct qeth_card *card)
1556 {
1557 QETH_CARD_TEXT(card, 4, "intqdinf");
1558 atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
1559 card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT;
1560 card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
1561
1562 /* inbound */
1563 card->qdio.no_in_queues = 1;
1564 card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
1565 if (IS_IQD(card))
1566 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_HSDEFAULT;
1567 else
1568 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_DEFAULT;
1569 card->qdio.in_buf_pool.buf_count = card->qdio.init_pool.buf_count;
1570 INIT_LIST_HEAD(&card->qdio.in_buf_pool.entry_list);
1571 INIT_LIST_HEAD(&card->qdio.init_pool.entry_list);
1572 }
1573
1574 static void qeth_set_initial_options(struct qeth_card *card)
1575 {
1576 card->options.route4.type = NO_ROUTER;
1577 card->options.route6.type = NO_ROUTER;
1578 card->options.isolation = ISOLATION_MODE_NONE;
1579 card->options.cq = QETH_CQ_DISABLED;
1580 card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
1581 }
1582
1583 static int qeth_do_start_thread(struct qeth_card *card, unsigned long thread)
1584 {
1585 unsigned long flags;
1586 int rc = 0;
1587
1588 spin_lock_irqsave(&card->thread_mask_lock, flags);
1589 QETH_CARD_TEXT_(card, 4, " %02x%02x%02x",
1590 (u8) card->thread_start_mask,
1591 (u8) card->thread_allowed_mask,
1592 (u8) card->thread_running_mask);
1593 rc = (card->thread_start_mask & thread);
1594 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1595 return rc;
1596 }
1597
1598 static int qeth_do_reset(void *data);
1599 static void qeth_start_kernel_thread(struct work_struct *work)
1600 {
1601 struct task_struct *ts;
1602 struct qeth_card *card = container_of(work, struct qeth_card,
1603 kernel_thread_starter);
1604 QETH_CARD_TEXT(card, 2, "strthrd");
1605
1606 if (card->read.state != CH_STATE_UP &&
1607 card->write.state != CH_STATE_UP)
1608 return;
1609 if (qeth_do_start_thread(card, QETH_RECOVER_THREAD)) {
1610 ts = kthread_run(qeth_do_reset, card, "qeth_recover");
1611 if (IS_ERR(ts)) {
1612 qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1613 qeth_clear_thread_running_bit(card,
1614 QETH_RECOVER_THREAD);
1615 }
1616 }
1617 }
1618
1619 static void qeth_buffer_reclaim_work(struct work_struct *);
1620 static void qeth_setup_card(struct qeth_card *card)
1621 {
1622 QETH_CARD_TEXT(card, 2, "setupcrd");
1623
1624 card->info.type = CARD_RDEV(card)->id.driver_info;
1625 card->state = CARD_STATE_DOWN;
1626 spin_lock_init(&card->lock);
1627 spin_lock_init(&card->thread_mask_lock);
1628 mutex_init(&card->conf_mutex);
1629 mutex_init(&card->discipline_mutex);
1630 INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread);
1631 INIT_LIST_HEAD(&card->cmd_waiter_list);
1632 init_waitqueue_head(&card->wait_q);
1633 qeth_set_initial_options(card);
1634 /* IP address takeover */
1635 INIT_LIST_HEAD(&card->ipato.entries);
1636 qeth_init_qdio_info(card);
1637 INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work);
1638 INIT_WORK(&card->close_dev_work, qeth_close_dev_handler);
1639 hash_init(card->rx_mode_addrs);
1640 hash_init(card->local_addrs4);
1641 hash_init(card->local_addrs6);
1642 spin_lock_init(&card->local_addrs4_lock);
1643 spin_lock_init(&card->local_addrs6_lock);
1644 }
1645
1646 static void qeth_core_sl_print(struct seq_file *m, struct service_level *slr)
1647 {
1648 struct qeth_card *card = container_of(slr, struct qeth_card,
1649 qeth_service_level);
1650 if (card->info.mcl_level[0])
1651 seq_printf(m, "qeth: %s firmware level %s\n",
1652 CARD_BUS_ID(card), card->info.mcl_level);
1653 }
1654
1655 static struct qeth_card *qeth_alloc_card(struct ccwgroup_device *gdev)
1656 {
1657 struct qeth_card *card;
1658
1659 QETH_DBF_TEXT(SETUP, 2, "alloccrd");
1660 card = kzalloc(sizeof(*card), GFP_KERNEL);
1661 if (!card)
1662 goto out;
1663 QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1664
1665 card->gdev = gdev;
1666 dev_set_drvdata(&gdev->dev, card);
1667 CARD_RDEV(card) = gdev->cdev[0];
1668 CARD_WDEV(card) = gdev->cdev[1];
1669 CARD_DDEV(card) = gdev->cdev[2];
1670
1671 card->event_wq = alloc_ordered_workqueue("%s_event", 0,
1672 dev_name(&gdev->dev));
1673 if (!card->event_wq)
1674 goto out_wq;
1675
1676 card->read_cmd = qeth_alloc_cmd(&card->read, QETH_BUFSIZE, 1, 0);
1677 if (!card->read_cmd)
1678 goto out_read_cmd;
1679
1680 card->debugfs = debugfs_create_dir(dev_name(&gdev->dev),
1681 qeth_debugfs_root);
1682 debugfs_create_file("local_addrs", 0400, card->debugfs, card,
1683 &qeth_debugfs_local_addr_fops);
1684
1685 card->qeth_service_level.seq_print = qeth_core_sl_print;
1686 register_service_level(&card->qeth_service_level);
1687 return card;
1688
1689 out_read_cmd:
1690 destroy_workqueue(card->event_wq);
1691 out_wq:
1692 dev_set_drvdata(&gdev->dev, NULL);
1693 kfree(card);
1694 out:
1695 return NULL;
1696 }
1697
1698 static int qeth_clear_channel(struct qeth_card *card,
1699 struct qeth_channel *channel)
1700 {
1701 int rc;
1702
1703 QETH_CARD_TEXT(card, 3, "clearch");
1704 spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1705 rc = ccw_device_clear(channel->ccwdev, (addr_t)channel->active_cmd);
1706 spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1707
1708 if (rc)
1709 return rc;
1710 rc = wait_event_interruptible_timeout(card->wait_q,
1711 channel->state == CH_STATE_STOPPED, QETH_TIMEOUT);
1712 if (rc == -ERESTARTSYS)
1713 return rc;
1714 if (channel->state != CH_STATE_STOPPED)
1715 return -ETIME;
1716 channel->state = CH_STATE_DOWN;
1717 return 0;
1718 }
1719
1720 static int qeth_halt_channel(struct qeth_card *card,
1721 struct qeth_channel *channel)
1722 {
1723 int rc;
1724
1725 QETH_CARD_TEXT(card, 3, "haltch");
1726 spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1727 rc = ccw_device_halt(channel->ccwdev, (addr_t)channel->active_cmd);
1728 spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1729
1730 if (rc)
1731 return rc;
1732 rc = wait_event_interruptible_timeout(card->wait_q,
1733 channel->state == CH_STATE_HALTED, QETH_TIMEOUT);
1734 if (rc == -ERESTARTSYS)
1735 return rc;
1736 if (channel->state != CH_STATE_HALTED)
1737 return -ETIME;
1738 return 0;
1739 }
1740
1741 static int qeth_stop_channel(struct qeth_channel *channel)
1742 {
1743 struct ccw_device *cdev = channel->ccwdev;
1744 int rc;
1745
1746 rc = ccw_device_set_offline(cdev);
1747
1748 spin_lock_irq(get_ccwdev_lock(cdev));
1749 if (channel->active_cmd) {
1750 dev_err(&cdev->dev, "Stopped channel while cmd %px was still active\n",
1751 channel->active_cmd);
1752 channel->active_cmd = NULL;
1753 }
1754 cdev->handler = NULL;
1755 spin_unlock_irq(get_ccwdev_lock(cdev));
1756
1757 return rc;
1758 }
1759
1760 static int qeth_start_channel(struct qeth_channel *channel)
1761 {
1762 struct ccw_device *cdev = channel->ccwdev;
1763 int rc;
1764
1765 channel->state = CH_STATE_DOWN;
1766 atomic_set(&channel->irq_pending, 0);
1767
1768 spin_lock_irq(get_ccwdev_lock(cdev));
1769 cdev->handler = qeth_irq;
1770 spin_unlock_irq(get_ccwdev_lock(cdev));
1771
1772 rc = ccw_device_set_online(cdev);
1773 if (rc)
1774 goto err;
1775
1776 return 0;
1777
1778 err:
1779 spin_lock_irq(get_ccwdev_lock(cdev));
1780 cdev->handler = NULL;
1781 spin_unlock_irq(get_ccwdev_lock(cdev));
1782 return rc;
1783 }
1784
1785 static int qeth_halt_channels(struct qeth_card *card)
1786 {
1787 int rc1 = 0, rc2 = 0, rc3 = 0;
1788
1789 QETH_CARD_TEXT(card, 3, "haltchs");
1790 rc1 = qeth_halt_channel(card, &card->read);
1791 rc2 = qeth_halt_channel(card, &card->write);
1792 rc3 = qeth_halt_channel(card, &card->data);
1793 if (rc1)
1794 return rc1;
1795 if (rc2)
1796 return rc2;
1797 return rc3;
1798 }
1799
1800 static int qeth_clear_channels(struct qeth_card *card)
1801 {
1802 int rc1 = 0, rc2 = 0, rc3 = 0;
1803
1804 QETH_CARD_TEXT(card, 3, "clearchs");
1805 rc1 = qeth_clear_channel(card, &card->read);
1806 rc2 = qeth_clear_channel(card, &card->write);
1807 rc3 = qeth_clear_channel(card, &card->data);
1808 if (rc1)
1809 return rc1;
1810 if (rc2)
1811 return rc2;
1812 return rc3;
1813 }
1814
1815 static int qeth_clear_halt_card(struct qeth_card *card, int halt)
1816 {
1817 int rc = 0;
1818
1819 QETH_CARD_TEXT(card, 3, "clhacrd");
1820
1821 if (halt)
1822 rc = qeth_halt_channels(card);
1823 if (rc)
1824 return rc;
1825 return qeth_clear_channels(card);
1826 }
1827
1828 static int qeth_qdio_clear_card(struct qeth_card *card, int use_halt)
1829 {
1830 int rc = 0;
1831
1832 QETH_CARD_TEXT(card, 3, "qdioclr");
1833 switch (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ESTABLISHED,
1834 QETH_QDIO_CLEANING)) {
1835 case QETH_QDIO_ESTABLISHED:
1836 if (IS_IQD(card))
1837 rc = qdio_shutdown(CARD_DDEV(card),
1838 QDIO_FLAG_CLEANUP_USING_HALT);
1839 else
1840 rc = qdio_shutdown(CARD_DDEV(card),
1841 QDIO_FLAG_CLEANUP_USING_CLEAR);
1842 if (rc)
1843 QETH_CARD_TEXT_(card, 3, "1err%d", rc);
1844 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
1845 break;
1846 case QETH_QDIO_CLEANING:
1847 return rc;
1848 default:
1849 break;
1850 }
1851 rc = qeth_clear_halt_card(card, use_halt);
1852 if (rc)
1853 QETH_CARD_TEXT_(card, 3, "2err%d", rc);
1854 return rc;
1855 }
1856
1857 static enum qeth_discipline_id qeth_vm_detect_layer(struct qeth_card *card)
1858 {
1859 enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1860 struct diag26c_vnic_resp *response = NULL;
1861 struct diag26c_vnic_req *request = NULL;
1862 struct ccw_dev_id id;
1863 char userid[80];
1864 int rc = 0;
1865
1866 QETH_CARD_TEXT(card, 2, "vmlayer");
1867
1868 cpcmd("QUERY USERID", userid, sizeof(userid), &rc);
1869 if (rc)
1870 goto out;
1871
1872 request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
1873 response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
1874 if (!request || !response) {
1875 rc = -ENOMEM;
1876 goto out;
1877 }
1878
1879 ccw_device_get_id(CARD_RDEV(card), &id);
1880 request->resp_buf_len = sizeof(*response);
1881 request->resp_version = DIAG26C_VERSION6_VM65918;
1882 request->req_format = DIAG26C_VNIC_INFO;
1883 ASCEBC(userid, 8);
1884 memcpy(&request->sys_name, userid, 8);
1885 request->devno = id.devno;
1886
1887 QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1888 rc = diag26c(request, response, DIAG26C_PORT_VNIC);
1889 QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1890 if (rc)
1891 goto out;
1892 QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
1893
1894 if (request->resp_buf_len < sizeof(*response) ||
1895 response->version != request->resp_version) {
1896 rc = -EIO;
1897 goto out;
1898 }
1899
1900 if (response->protocol == VNIC_INFO_PROT_L2)
1901 disc = QETH_DISCIPLINE_LAYER2;
1902 else if (response->protocol == VNIC_INFO_PROT_L3)
1903 disc = QETH_DISCIPLINE_LAYER3;
1904
1905 out:
1906 kfree(response);
1907 kfree(request);
1908 if (rc)
1909 QETH_CARD_TEXT_(card, 2, "err%x", rc);
1910 return disc;
1911 }
1912
1913 /* Determine whether the device requires a specific layer discipline */
1914 static enum qeth_discipline_id qeth_enforce_discipline(struct qeth_card *card)
1915 {
1916 enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1917
1918 if (IS_OSM(card) || IS_OSN(card))
1919 disc = QETH_DISCIPLINE_LAYER2;
1920 else if (IS_VM_NIC(card))
1921 disc = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
1922 qeth_vm_detect_layer(card);
1923
1924 switch (disc) {
1925 case QETH_DISCIPLINE_LAYER2:
1926 QETH_CARD_TEXT(card, 3, "force l2");
1927 break;
1928 case QETH_DISCIPLINE_LAYER3:
1929 QETH_CARD_TEXT(card, 3, "force l3");
1930 break;
1931 default:
1932 QETH_CARD_TEXT(card, 3, "force no");
1933 }
1934
1935 return disc;
1936 }
1937
1938 static void qeth_set_blkt_defaults(struct qeth_card *card)
1939 {
1940 QETH_CARD_TEXT(card, 2, "cfgblkt");
1941
1942 if (card->info.use_v1_blkt) {
1943 card->info.blkt.time_total = 0;
1944 card->info.blkt.inter_packet = 0;
1945 card->info.blkt.inter_packet_jumbo = 0;
1946 } else {
1947 card->info.blkt.time_total = 250;
1948 card->info.blkt.inter_packet = 5;
1949 card->info.blkt.inter_packet_jumbo = 15;
1950 }
1951 }
1952
1953 static void qeth_idx_init(struct qeth_card *card)
1954 {
1955 memset(&card->seqno, 0, sizeof(card->seqno));
1956
1957 card->token.issuer_rm_w = 0x00010103UL;
1958 card->token.cm_filter_w = 0x00010108UL;
1959 card->token.cm_connection_w = 0x0001010aUL;
1960 card->token.ulp_filter_w = 0x0001010bUL;
1961 card->token.ulp_connection_w = 0x0001010dUL;
1962
1963 switch (card->info.type) {
1964 case QETH_CARD_TYPE_IQD:
1965 card->info.func_level = QETH_IDX_FUNC_LEVEL_IQD;
1966 break;
1967 case QETH_CARD_TYPE_OSD:
1968 case QETH_CARD_TYPE_OSN:
1969 card->info.func_level = QETH_IDX_FUNC_LEVEL_OSD;
1970 break;
1971 default:
1972 break;
1973 }
1974 }
1975
1976 static void qeth_idx_finalize_cmd(struct qeth_card *card,
1977 struct qeth_cmd_buffer *iob)
1978 {
1979 memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data), &card->seqno.trans_hdr,
1980 QETH_SEQ_NO_LENGTH);
1981 if (iob->channel == &card->write)
1982 card->seqno.trans_hdr++;
1983 }
1984
1985 static int qeth_peer_func_level(int level)
1986 {
1987 if ((level & 0xff) == 8)
1988 return (level & 0xff) + 0x400;
1989 if (((level >> 8) & 3) == 1)
1990 return (level & 0xff) + 0x200;
1991 return level;
1992 }
1993
1994 static void qeth_mpc_finalize_cmd(struct qeth_card *card,
1995 struct qeth_cmd_buffer *iob)
1996 {
1997 qeth_idx_finalize_cmd(card, iob);
1998
1999 memcpy(QETH_PDU_HEADER_SEQ_NO(iob->data),
2000 &card->seqno.pdu_hdr, QETH_SEQ_NO_LENGTH);
2001 card->seqno.pdu_hdr++;
2002 memcpy(QETH_PDU_HEADER_ACK_SEQ_NO(iob->data),
2003 &card->seqno.pdu_hdr_ack, QETH_SEQ_NO_LENGTH);
2004
2005 iob->callback = qeth_release_buffer_cb;
2006 }
2007
2008 static bool qeth_mpc_match_reply(struct qeth_cmd_buffer *iob,
2009 struct qeth_cmd_buffer *reply)
2010 {
2011 /* MPC cmds are issued strictly in sequence. */
2012 return !IS_IPA(reply->data);
2013 }
2014
2015 static struct qeth_cmd_buffer *qeth_mpc_alloc_cmd(struct qeth_card *card,
2016 const void *data,
2017 unsigned int data_length)
2018 {
2019 struct qeth_cmd_buffer *iob;
2020
2021 iob = qeth_alloc_cmd(&card->write, data_length, 1, QETH_TIMEOUT);
2022 if (!iob)
2023 return NULL;
2024
2025 memcpy(iob->data, data, data_length);
2026 qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, data_length,
2027 iob->data);
2028 iob->finalize = qeth_mpc_finalize_cmd;
2029 iob->match = qeth_mpc_match_reply;
2030 return iob;
2031 }
2032
2033 /**
2034 * qeth_send_control_data() - send control command to the card
2035 * @card: qeth_card structure pointer
2036 * @iob: qeth_cmd_buffer pointer
2037 * @reply_cb: callback function pointer
2038 * @cb_card: pointer to the qeth_card structure
2039 * @cb_reply: pointer to the qeth_reply structure
2040 * @cb_cmd: pointer to the original iob for non-IPA
2041 * commands, or to the qeth_ipa_cmd structure
2042 * for the IPA commands.
2043 * @reply_param: private pointer passed to the callback
2044 *
2045 * Callback function gets called one or more times, with cb_cmd
2046 * pointing to the response returned by the hardware. Callback
2047 * function must return
2048 * > 0 if more reply blocks are expected,
2049 * 0 if the last or only reply block is received, and
2050 * < 0 on error.
2051 * Callback function can get the value of the reply_param pointer from the
2052 * field 'param' of the structure qeth_reply.
2053 */
2054
2055 static int qeth_send_control_data(struct qeth_card *card,
2056 struct qeth_cmd_buffer *iob,
2057 int (*reply_cb)(struct qeth_card *cb_card,
2058 struct qeth_reply *cb_reply,
2059 unsigned long cb_cmd),
2060 void *reply_param)
2061 {
2062 struct qeth_channel *channel = iob->channel;
2063 struct qeth_reply *reply = &iob->reply;
2064 long timeout = iob->timeout;
2065 int rc;
2066
2067 QETH_CARD_TEXT(card, 2, "sendctl");
2068
2069 reply->callback = reply_cb;
2070 reply->param = reply_param;
2071
2072 timeout = wait_event_interruptible_timeout(card->wait_q,
2073 qeth_trylock_channel(channel),
2074 timeout);
2075 if (timeout <= 0) {
2076 qeth_put_cmd(iob);
2077 return (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
2078 }
2079
2080 if (iob->finalize)
2081 iob->finalize(card, iob);
2082 QETH_DBF_HEX(CTRL, 2, iob->data, min(iob->length, QETH_DBF_CTRL_LEN));
2083
2084 qeth_enqueue_cmd(card, iob);
2085
2086 /* This pairs with iob->callback, and keeps the iob alive after IO: */
2087 qeth_get_cmd(iob);
2088
2089 QETH_CARD_TEXT(card, 6, "noirqpnd");
2090 spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
2091 rc = ccw_device_start_timeout(channel->ccwdev, __ccw_from_cmd(iob),
2092 (addr_t) iob, 0, 0, timeout);
2093 if (!rc)
2094 channel->active_cmd = iob;
2095 spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
2096 if (rc) {
2097 QETH_DBF_MESSAGE(2, "qeth_send_control_data on device %x: ccw_device_start rc = %i\n",
2098 CARD_DEVID(card), rc);
2099 QETH_CARD_TEXT_(card, 2, " err%d", rc);
2100 qeth_dequeue_cmd(card, iob);
2101 qeth_put_cmd(iob);
2102 qeth_unlock_channel(card, channel);
2103 goto out;
2104 }
2105
2106 timeout = wait_for_completion_interruptible_timeout(&iob->done,
2107 timeout);
2108 if (timeout <= 0)
2109 rc = (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
2110
2111 qeth_dequeue_cmd(card, iob);
2112
2113 if (reply_cb) {
2114 /* Wait until the callback for a late reply has completed: */
2115 spin_lock_irq(&iob->lock);
2116 if (rc)
2117 /* Zap any callback that's still pending: */
2118 iob->rc = rc;
2119 spin_unlock_irq(&iob->lock);
2120 }
2121
2122 if (!rc)
2123 rc = iob->rc;
2124
2125 out:
2126 qeth_put_cmd(iob);
2127 return rc;
2128 }
2129
2130 struct qeth_node_desc {
2131 struct node_descriptor nd1;
2132 struct node_descriptor nd2;
2133 struct node_descriptor nd3;
2134 };
2135
2136 static void qeth_read_conf_data_cb(struct qeth_card *card,
2137 struct qeth_cmd_buffer *iob,
2138 unsigned int data_length)
2139 {
2140 struct qeth_node_desc *nd = (struct qeth_node_desc *) iob->data;
2141 int rc = 0;
2142 u8 *tag;
2143
2144 QETH_CARD_TEXT(card, 2, "cfgunit");
2145
2146 if (data_length < sizeof(*nd)) {
2147 rc = -EINVAL;
2148 goto out;
2149 }
2150
2151 card->info.is_vm_nic = nd->nd1.plant[0] == _ascebc['V'] &&
2152 nd->nd1.plant[1] == _ascebc['M'];
2153 tag = (u8 *)&nd->nd1.tag;
2154 card->info.chpid = tag[0];
2155 card->info.unit_addr2 = tag[1];
2156
2157 tag = (u8 *)&nd->nd2.tag;
2158 card->info.cula = tag[1];
2159
2160 card->info.use_v1_blkt = nd->nd3.model[0] == 0xF0 &&
2161 nd->nd3.model[1] == 0xF0 &&
2162 nd->nd3.model[2] >= 0xF1 &&
2163 nd->nd3.model[2] <= 0xF4;
2164
2165 out:
2166 qeth_notify_cmd(iob, rc);
2167 qeth_put_cmd(iob);
2168 }
2169
2170 static int qeth_read_conf_data(struct qeth_card *card)
2171 {
2172 struct qeth_channel *channel = &card->data;
2173 struct qeth_cmd_buffer *iob;
2174 struct ciw *ciw;
2175
2176 /* scan for RCD command in extended SenseID data */
2177 ciw = ccw_device_get_ciw(channel->ccwdev, CIW_TYPE_RCD);
2178 if (!ciw || ciw->cmd == 0)
2179 return -EOPNOTSUPP;
2180 if (ciw->count < sizeof(struct qeth_node_desc))
2181 return -EINVAL;
2182
2183 iob = qeth_alloc_cmd(channel, ciw->count, 1, QETH_RCD_TIMEOUT);
2184 if (!iob)
2185 return -ENOMEM;
2186
2187 iob->callback = qeth_read_conf_data_cb;
2188 qeth_setup_ccw(__ccw_from_cmd(iob), ciw->cmd, 0, iob->length,
2189 iob->data);
2190
2191 return qeth_send_control_data(card, iob, NULL, NULL);
2192 }
2193
2194 static int qeth_idx_check_activate_response(struct qeth_card *card,
2195 struct qeth_channel *channel,
2196 struct qeth_cmd_buffer *iob)
2197 {
2198 int rc;
2199
2200 rc = qeth_check_idx_response(card, iob->data);
2201 if (rc)
2202 return rc;
2203
2204 if (QETH_IS_IDX_ACT_POS_REPLY(iob->data))
2205 return 0;
2206
2207 /* negative reply: */
2208 QETH_CARD_TEXT_(card, 2, "idxneg%c",
2209 QETH_IDX_ACT_CAUSE_CODE(iob->data));
2210
2211 switch (QETH_IDX_ACT_CAUSE_CODE(iob->data)) {
2212 case QETH_IDX_ACT_ERR_EXCL:
2213 dev_err(&channel->ccwdev->dev,
2214 "The adapter is used exclusively by another host\n");
2215 return -EBUSY;
2216 case QETH_IDX_ACT_ERR_AUTH:
2217 case QETH_IDX_ACT_ERR_AUTH_USER:
2218 dev_err(&channel->ccwdev->dev,
2219 "Setting the device online failed because of insufficient authorization\n");
2220 return -EPERM;
2221 default:
2222 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: negative reply\n",
2223 CCW_DEVID(channel->ccwdev));
2224 return -EIO;
2225 }
2226 }
2227
2228 static void qeth_idx_activate_read_channel_cb(struct qeth_card *card,
2229 struct qeth_cmd_buffer *iob,
2230 unsigned int data_length)
2231 {
2232 struct qeth_channel *channel = iob->channel;
2233 u16 peer_level;
2234 int rc;
2235
2236 QETH_CARD_TEXT(card, 2, "idxrdcb");
2237
2238 rc = qeth_idx_check_activate_response(card, channel, iob);
2239 if (rc)
2240 goto out;
2241
2242 memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2243 if (peer_level != qeth_peer_func_level(card->info.func_level)) {
2244 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
2245 CCW_DEVID(channel->ccwdev),
2246 card->info.func_level, peer_level);
2247 rc = -EINVAL;
2248 goto out;
2249 }
2250
2251 memcpy(&card->token.issuer_rm_r,
2252 QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2253 QETH_MPC_TOKEN_LENGTH);
2254 memcpy(&card->info.mcl_level[0],
2255 QETH_IDX_REPLY_LEVEL(iob->data), QETH_MCL_LENGTH);
2256
2257 out:
2258 qeth_notify_cmd(iob, rc);
2259 qeth_put_cmd(iob);
2260 }
2261
2262 static void qeth_idx_activate_write_channel_cb(struct qeth_card *card,
2263 struct qeth_cmd_buffer *iob,
2264 unsigned int data_length)
2265 {
2266 struct qeth_channel *channel = iob->channel;
2267 u16 peer_level;
2268 int rc;
2269
2270 QETH_CARD_TEXT(card, 2, "idxwrcb");
2271
2272 rc = qeth_idx_check_activate_response(card, channel, iob);
2273 if (rc)
2274 goto out;
2275
2276 memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2277 if ((peer_level & ~0x0100) !=
2278 qeth_peer_func_level(card->info.func_level)) {
2279 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
2280 CCW_DEVID(channel->ccwdev),
2281 card->info.func_level, peer_level);
2282 rc = -EINVAL;
2283 }
2284
2285 out:
2286 qeth_notify_cmd(iob, rc);
2287 qeth_put_cmd(iob);
2288 }
2289
2290 static void qeth_idx_setup_activate_cmd(struct qeth_card *card,
2291 struct qeth_cmd_buffer *iob)
2292 {
2293 u16 addr = (card->info.cula << 8) + card->info.unit_addr2;
2294 u8 port = ((u8)card->dev->dev_port) | 0x80;
2295 struct ccw1 *ccw = __ccw_from_cmd(iob);
2296
2297 qeth_setup_ccw(&ccw[0], CCW_CMD_WRITE, CCW_FLAG_CC, IDX_ACTIVATE_SIZE,
2298 iob->data);
2299 qeth_setup_ccw(&ccw[1], CCW_CMD_READ, 0, iob->length, iob->data);
2300 iob->finalize = qeth_idx_finalize_cmd;
2301
2302 port |= QETH_IDX_ACT_INVAL_FRAME;
2303 memcpy(QETH_IDX_ACT_PNO(iob->data), &port, 1);
2304 memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2305 &card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH);
2306 memcpy(QETH_IDX_ACT_FUNC_LEVEL(iob->data),
2307 &card->info.func_level, 2);
2308 memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &card->info.ddev_devno, 2);
2309 memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &addr, 2);
2310 }
2311
2312 static int qeth_idx_activate_read_channel(struct qeth_card *card)
2313 {
2314 struct qeth_channel *channel = &card->read;
2315 struct qeth_cmd_buffer *iob;
2316 int rc;
2317
2318 QETH_CARD_TEXT(card, 2, "idxread");
2319
2320 iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
2321 if (!iob)
2322 return -ENOMEM;
2323
2324 memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE);
2325 qeth_idx_setup_activate_cmd(card, iob);
2326 iob->callback = qeth_idx_activate_read_channel_cb;
2327
2328 rc = qeth_send_control_data(card, iob, NULL, NULL);
2329 if (rc)
2330 return rc;
2331
2332 channel->state = CH_STATE_UP;
2333 return 0;
2334 }
2335
2336 static int qeth_idx_activate_write_channel(struct qeth_card *card)
2337 {
2338 struct qeth_channel *channel = &card->write;
2339 struct qeth_cmd_buffer *iob;
2340 int rc;
2341
2342 QETH_CARD_TEXT(card, 2, "idxwrite");
2343
2344 iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
2345 if (!iob)
2346 return -ENOMEM;
2347
2348 memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE);
2349 qeth_idx_setup_activate_cmd(card, iob);
2350 iob->callback = qeth_idx_activate_write_channel_cb;
2351
2352 rc = qeth_send_control_data(card, iob, NULL, NULL);
2353 if (rc)
2354 return rc;
2355
2356 channel->state = CH_STATE_UP;
2357 return 0;
2358 }
2359
2360 static int qeth_cm_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2361 unsigned long data)
2362 {
2363 struct qeth_cmd_buffer *iob;
2364
2365 QETH_CARD_TEXT(card, 2, "cmenblcb");
2366
2367 iob = (struct qeth_cmd_buffer *) data;
2368 memcpy(&card->token.cm_filter_r,
2369 QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data),
2370 QETH_MPC_TOKEN_LENGTH);
2371 return 0;
2372 }
2373
2374 static int qeth_cm_enable(struct qeth_card *card)
2375 {
2376 struct qeth_cmd_buffer *iob;
2377
2378 QETH_CARD_TEXT(card, 2, "cmenable");
2379
2380 iob = qeth_mpc_alloc_cmd(card, CM_ENABLE, CM_ENABLE_SIZE);
2381 if (!iob)
2382 return -ENOMEM;
2383
2384 memcpy(QETH_CM_ENABLE_ISSUER_RM_TOKEN(iob->data),
2385 &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2386 memcpy(QETH_CM_ENABLE_FILTER_TOKEN(iob->data),
2387 &card->token.cm_filter_w, QETH_MPC_TOKEN_LENGTH);
2388
2389 return qeth_send_control_data(card, iob, qeth_cm_enable_cb, NULL);
2390 }
2391
2392 static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2393 unsigned long data)
2394 {
2395 struct qeth_cmd_buffer *iob;
2396
2397 QETH_CARD_TEXT(card, 2, "cmsetpcb");
2398
2399 iob = (struct qeth_cmd_buffer *) data;
2400 memcpy(&card->token.cm_connection_r,
2401 QETH_CM_SETUP_RESP_DEST_ADDR(iob->data),
2402 QETH_MPC_TOKEN_LENGTH);
2403 return 0;
2404 }
2405
2406 static int qeth_cm_setup(struct qeth_card *card)
2407 {
2408 struct qeth_cmd_buffer *iob;
2409
2410 QETH_CARD_TEXT(card, 2, "cmsetup");
2411
2412 iob = qeth_mpc_alloc_cmd(card, CM_SETUP, CM_SETUP_SIZE);
2413 if (!iob)
2414 return -ENOMEM;
2415
2416 memcpy(QETH_CM_SETUP_DEST_ADDR(iob->data),
2417 &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2418 memcpy(QETH_CM_SETUP_CONNECTION_TOKEN(iob->data),
2419 &card->token.cm_connection_w, QETH_MPC_TOKEN_LENGTH);
2420 memcpy(QETH_CM_SETUP_FILTER_TOKEN(iob->data),
2421 &card->token.cm_filter_r, QETH_MPC_TOKEN_LENGTH);
2422 return qeth_send_control_data(card, iob, qeth_cm_setup_cb, NULL);
2423 }
2424
2425 static bool qeth_is_supported_link_type(struct qeth_card *card, u8 link_type)
2426 {
2427 if (link_type == QETH_LINK_TYPE_LANE_TR ||
2428 link_type == QETH_LINK_TYPE_HSTR) {
2429 dev_err(&card->gdev->dev, "Unsupported Token Ring device\n");
2430 return false;
2431 }
2432
2433 return true;
2434 }
2435
2436 static int qeth_update_max_mtu(struct qeth_card *card, unsigned int max_mtu)
2437 {
2438 struct net_device *dev = card->dev;
2439 unsigned int new_mtu;
2440
2441 if (!max_mtu) {
2442 /* IQD needs accurate max MTU to set up its RX buffers: */
2443 if (IS_IQD(card))
2444 return -EINVAL;
2445 /* tolerate quirky HW: */
2446 max_mtu = ETH_MAX_MTU;
2447 }
2448
2449 rtnl_lock();
2450 if (IS_IQD(card)) {
2451 /* move any device with default MTU to new max MTU: */
2452 new_mtu = (dev->mtu == dev->max_mtu) ? max_mtu : dev->mtu;
2453
2454 /* adjust RX buffer size to new max MTU: */
2455 card->qdio.in_buf_size = max_mtu + 2 * PAGE_SIZE;
2456 if (dev->max_mtu && dev->max_mtu != max_mtu)
2457 qeth_free_qdio_queues(card);
2458 } else {
2459 if (dev->mtu)
2460 new_mtu = dev->mtu;
2461 /* default MTUs for first setup: */
2462 else if (IS_LAYER2(card))
2463 new_mtu = ETH_DATA_LEN;
2464 else
2465 new_mtu = ETH_DATA_LEN - 8; /* allow for LLC + SNAP */
2466 }
2467
2468 dev->max_mtu = max_mtu;
2469 dev->mtu = min(new_mtu, max_mtu);
2470 rtnl_unlock();
2471 return 0;
2472 }
2473
2474 static int qeth_get_mtu_outof_framesize(int framesize)
2475 {
2476 switch (framesize) {
2477 case 0x4000:
2478 return 8192;
2479 case 0x6000:
2480 return 16384;
2481 case 0xa000:
2482 return 32768;
2483 case 0xffff:
2484 return 57344;
2485 default:
2486 return 0;
2487 }
2488 }
2489
2490 static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2491 unsigned long data)
2492 {
2493 __u16 mtu, framesize;
2494 __u16 len;
2495 struct qeth_cmd_buffer *iob;
2496 u8 link_type = 0;
2497
2498 QETH_CARD_TEXT(card, 2, "ulpenacb");
2499
2500 iob = (struct qeth_cmd_buffer *) data;
2501 memcpy(&card->token.ulp_filter_r,
2502 QETH_ULP_ENABLE_RESP_FILTER_TOKEN(iob->data),
2503 QETH_MPC_TOKEN_LENGTH);
2504 if (IS_IQD(card)) {
2505 memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2);
2506 mtu = qeth_get_mtu_outof_framesize(framesize);
2507 } else {
2508 mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data);
2509 }
2510 *(u16 *)reply->param = mtu;
2511
2512 memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2);
2513 if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) {
2514 memcpy(&link_type,
2515 QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1);
2516 if (!qeth_is_supported_link_type(card, link_type))
2517 return -EPROTONOSUPPORT;
2518 }
2519
2520 card->info.link_type = link_type;
2521 QETH_CARD_TEXT_(card, 2, "link%d", card->info.link_type);
2522 return 0;
2523 }
2524
2525 static u8 qeth_mpc_select_prot_type(struct qeth_card *card)
2526 {
2527 if (IS_OSN(card))
2528 return QETH_PROT_OSN2;
2529 return IS_LAYER2(card) ? QETH_PROT_LAYER2 : QETH_PROT_TCPIP;
2530 }
2531
2532 static int qeth_ulp_enable(struct qeth_card *card)
2533 {
2534 u8 prot_type = qeth_mpc_select_prot_type(card);
2535 struct qeth_cmd_buffer *iob;
2536 u16 max_mtu;
2537 int rc;
2538
2539 QETH_CARD_TEXT(card, 2, "ulpenabl");
2540
2541 iob = qeth_mpc_alloc_cmd(card, ULP_ENABLE, ULP_ENABLE_SIZE);
2542 if (!iob)
2543 return -ENOMEM;
2544
2545 *(QETH_ULP_ENABLE_LINKNUM(iob->data)) = (u8) card->dev->dev_port;
2546 memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1);
2547 memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data),
2548 &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2549 memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data),
2550 &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH);
2551 rc = qeth_send_control_data(card, iob, qeth_ulp_enable_cb, &max_mtu);
2552 if (rc)
2553 return rc;
2554 return qeth_update_max_mtu(card, max_mtu);
2555 }
2556
2557 static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2558 unsigned long data)
2559 {
2560 struct qeth_cmd_buffer *iob;
2561
2562 QETH_CARD_TEXT(card, 2, "ulpstpcb");
2563
2564 iob = (struct qeth_cmd_buffer *) data;
2565 memcpy(&card->token.ulp_connection_r,
2566 QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2567 QETH_MPC_TOKEN_LENGTH);
2568 if (!strncmp("00S", QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2569 3)) {
2570 QETH_CARD_TEXT(card, 2, "olmlimit");
2571 dev_err(&card->gdev->dev, "A connection could not be "
2572 "established because of an OLM limit\n");
2573 return -EMLINK;
2574 }
2575 return 0;
2576 }
2577
2578 static int qeth_ulp_setup(struct qeth_card *card)
2579 {
2580 __u16 temp;
2581 struct qeth_cmd_buffer *iob;
2582
2583 QETH_CARD_TEXT(card, 2, "ulpsetup");
2584
2585 iob = qeth_mpc_alloc_cmd(card, ULP_SETUP, ULP_SETUP_SIZE);
2586 if (!iob)
2587 return -ENOMEM;
2588
2589 memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data),
2590 &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2591 memcpy(QETH_ULP_SETUP_CONNECTION_TOKEN(iob->data),
2592 &card->token.ulp_connection_w, QETH_MPC_TOKEN_LENGTH);
2593 memcpy(QETH_ULP_SETUP_FILTER_TOKEN(iob->data),
2594 &card->token.ulp_filter_r, QETH_MPC_TOKEN_LENGTH);
2595
2596 memcpy(QETH_ULP_SETUP_CUA(iob->data), &card->info.ddev_devno, 2);
2597 temp = (card->info.cula << 8) + card->info.unit_addr2;
2598 memcpy(QETH_ULP_SETUP_REAL_DEVADDR(iob->data), &temp, 2);
2599 return qeth_send_control_data(card, iob, qeth_ulp_setup_cb, NULL);
2600 }
2601
2602 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *q, int bidx)
2603 {
2604 struct qeth_qdio_out_buffer *newbuf;
2605
2606 newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, GFP_ATOMIC);
2607 if (!newbuf)
2608 return -ENOMEM;
2609
2610 newbuf->buffer = q->qdio_bufs[bidx];
2611 skb_queue_head_init(&newbuf->skb_list);
2612 lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key);
2613 newbuf->q = q;
2614 newbuf->next_pending = q->bufs[bidx];
2615 atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY);
2616 q->bufs[bidx] = newbuf;
2617 return 0;
2618 }
2619
2620 static void qeth_free_output_queue(struct qeth_qdio_out_q *q)
2621 {
2622 if (!q)
2623 return;
2624
2625 qeth_drain_output_queue(q, true);
2626 qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2627 kfree(q);
2628 }
2629
2630 static struct qeth_qdio_out_q *qeth_alloc_output_queue(void)
2631 {
2632 struct qeth_qdio_out_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
2633
2634 if (!q)
2635 return NULL;
2636
2637 if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
2638 kfree(q);
2639 return NULL;
2640 }
2641 return q;
2642 }
2643
2644 static void qeth_tx_completion_timer(struct timer_list *timer)
2645 {
2646 struct qeth_qdio_out_q *queue = from_timer(queue, timer, timer);
2647
2648 napi_schedule(&queue->napi);
2649 QETH_TXQ_STAT_INC(queue, completion_timer);
2650 }
2651
2652 static int qeth_alloc_qdio_queues(struct qeth_card *card)
2653 {
2654 int i, j;
2655
2656 QETH_CARD_TEXT(card, 2, "allcqdbf");
2657
2658 if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED,
2659 QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED)
2660 return 0;
2661
2662 QETH_CARD_TEXT(card, 2, "inq");
2663 card->qdio.in_q = qeth_alloc_qdio_queue();
2664 if (!card->qdio.in_q)
2665 goto out_nomem;
2666
2667 /* inbound buffer pool */
2668 if (qeth_alloc_buffer_pool(card))
2669 goto out_freeinq;
2670
2671 /* outbound */
2672 for (i = 0; i < card->qdio.no_out_queues; ++i) {
2673 struct qeth_qdio_out_q *queue;
2674
2675 queue = qeth_alloc_output_queue();
2676 if (!queue)
2677 goto out_freeoutq;
2678 QETH_CARD_TEXT_(card, 2, "outq %i", i);
2679 QETH_CARD_HEX(card, 2, &queue, sizeof(void *));
2680 card->qdio.out_qs[i] = queue;
2681 queue->card = card;
2682 queue->queue_no = i;
2683 spin_lock_init(&queue->lock);
2684 timer_setup(&queue->timer, qeth_tx_completion_timer, 0);
2685 queue->coalesce_usecs = QETH_TX_COALESCE_USECS;
2686 queue->max_coalesced_frames = QETH_TX_MAX_COALESCED_FRAMES;
2687 queue->priority = QETH_QIB_PQUE_PRIO_DEFAULT;
2688
2689 /* give outbound qeth_qdio_buffers their qdio_buffers */
2690 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2691 WARN_ON(queue->bufs[j]);
2692 if (qeth_init_qdio_out_buf(queue, j))
2693 goto out_freeoutqbufs;
2694 }
2695 }
2696
2697 /* completion */
2698 if (qeth_alloc_cq(card))
2699 goto out_freeoutq;
2700
2701 return 0;
2702
2703 out_freeoutqbufs:
2704 while (j > 0) {
2705 --j;
2706 kmem_cache_free(qeth_qdio_outbuf_cache,
2707 card->qdio.out_qs[i]->bufs[j]);
2708 card->qdio.out_qs[i]->bufs[j] = NULL;
2709 }
2710 out_freeoutq:
2711 while (i > 0) {
2712 qeth_free_output_queue(card->qdio.out_qs[--i]);
2713 card->qdio.out_qs[i] = NULL;
2714 }
2715 qeth_free_buffer_pool(card);
2716 out_freeinq:
2717 qeth_free_qdio_queue(card->qdio.in_q);
2718 card->qdio.in_q = NULL;
2719 out_nomem:
2720 atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
2721 return -ENOMEM;
2722 }
2723
2724 static void qeth_free_qdio_queues(struct qeth_card *card)
2725 {
2726 int i, j;
2727
2728 if (atomic_xchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED) ==
2729 QETH_QDIO_UNINITIALIZED)
2730 return;
2731
2732 qeth_free_cq(card);
2733 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2734 if (card->qdio.in_q->bufs[j].rx_skb)
2735 dev_kfree_skb_any(card->qdio.in_q->bufs[j].rx_skb);
2736 }
2737 qeth_free_qdio_queue(card->qdio.in_q);
2738 card->qdio.in_q = NULL;
2739 /* inbound buffer pool */
2740 qeth_free_buffer_pool(card);
2741 /* free outbound qdio_qs */
2742 for (i = 0; i < card->qdio.no_out_queues; i++) {
2743 qeth_free_output_queue(card->qdio.out_qs[i]);
2744 card->qdio.out_qs[i] = NULL;
2745 }
2746 }
2747
2748 static void qeth_fill_qib_parms(struct qeth_card *card,
2749 struct qeth_qib_parms *parms)
2750 {
2751 struct qeth_qdio_out_q *queue;
2752 unsigned int i;
2753
2754 parms->pcit_magic[0] = 'P';
2755 parms->pcit_magic[1] = 'C';
2756 parms->pcit_magic[2] = 'I';
2757 parms->pcit_magic[3] = 'T';
2758 ASCEBC(parms->pcit_magic, sizeof(parms->pcit_magic));
2759 parms->pcit_a = QETH_PCI_THRESHOLD_A(card);
2760 parms->pcit_b = QETH_PCI_THRESHOLD_B(card);
2761 parms->pcit_c = QETH_PCI_TIMER_VALUE(card);
2762
2763 parms->blkt_magic[0] = 'B';
2764 parms->blkt_magic[1] = 'L';
2765 parms->blkt_magic[2] = 'K';
2766 parms->blkt_magic[3] = 'T';
2767 ASCEBC(parms->blkt_magic, sizeof(parms->blkt_magic));
2768 parms->blkt_total = card->info.blkt.time_total;
2769 parms->blkt_inter_packet = card->info.blkt.inter_packet;
2770 parms->blkt_inter_packet_jumbo = card->info.blkt.inter_packet_jumbo;
2771
2772 /* Prio-queueing implicitly uses the default priorities: */
2773 if (qeth_uses_tx_prio_queueing(card) || card->qdio.no_out_queues == 1)
2774 return;
2775
2776 parms->pque_magic[0] = 'P';
2777 parms->pque_magic[1] = 'Q';
2778 parms->pque_magic[2] = 'U';
2779 parms->pque_magic[3] = 'E';
2780 ASCEBC(parms->pque_magic, sizeof(parms->pque_magic));
2781 parms->pque_order = QETH_QIB_PQUE_ORDER_RR;
2782 parms->pque_units = QETH_QIB_PQUE_UNITS_SBAL;
2783
2784 qeth_for_each_output_queue(card, queue, i)
2785 parms->pque_priority[i] = queue->priority;
2786 }
2787
2788 static int qeth_qdio_activate(struct qeth_card *card)
2789 {
2790 QETH_CARD_TEXT(card, 3, "qdioact");
2791 return qdio_activate(CARD_DDEV(card));
2792 }
2793
2794 static int qeth_dm_act(struct qeth_card *card)
2795 {
2796 struct qeth_cmd_buffer *iob;
2797
2798 QETH_CARD_TEXT(card, 2, "dmact");
2799
2800 iob = qeth_mpc_alloc_cmd(card, DM_ACT, DM_ACT_SIZE);
2801 if (!iob)
2802 return -ENOMEM;
2803
2804 memcpy(QETH_DM_ACT_DEST_ADDR(iob->data),
2805 &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2806 memcpy(QETH_DM_ACT_CONNECTION_TOKEN(iob->data),
2807 &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2808 return qeth_send_control_data(card, iob, NULL, NULL);
2809 }
2810
2811 static int qeth_mpc_initialize(struct qeth_card *card)
2812 {
2813 int rc;
2814
2815 QETH_CARD_TEXT(card, 2, "mpcinit");
2816
2817 rc = qeth_issue_next_read(card);
2818 if (rc) {
2819 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
2820 return rc;
2821 }
2822 rc = qeth_cm_enable(card);
2823 if (rc) {
2824 QETH_CARD_TEXT_(card, 2, "2err%d", rc);
2825 return rc;
2826 }
2827 rc = qeth_cm_setup(card);
2828 if (rc) {
2829 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
2830 return rc;
2831 }
2832 rc = qeth_ulp_enable(card);
2833 if (rc) {
2834 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
2835 return rc;
2836 }
2837 rc = qeth_ulp_setup(card);
2838 if (rc) {
2839 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2840 return rc;
2841 }
2842 rc = qeth_alloc_qdio_queues(card);
2843 if (rc) {
2844 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2845 return rc;
2846 }
2847 rc = qeth_qdio_establish(card);
2848 if (rc) {
2849 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
2850 qeth_free_qdio_queues(card);
2851 return rc;
2852 }
2853 rc = qeth_qdio_activate(card);
2854 if (rc) {
2855 QETH_CARD_TEXT_(card, 2, "7err%d", rc);
2856 return rc;
2857 }
2858 rc = qeth_dm_act(card);
2859 if (rc) {
2860 QETH_CARD_TEXT_(card, 2, "8err%d", rc);
2861 return rc;
2862 }
2863
2864 return 0;
2865 }
2866
2867 static void qeth_print_status_message(struct qeth_card *card)
2868 {
2869 switch (card->info.type) {
2870 case QETH_CARD_TYPE_OSD:
2871 case QETH_CARD_TYPE_OSM:
2872 case QETH_CARD_TYPE_OSX:
2873 /* VM will use a non-zero first character
2874 * to indicate a HiperSockets like reporting
2875 * of the level OSA sets the first character to zero
2876 * */
2877 if (!card->info.mcl_level[0]) {
2878 sprintf(card->info.mcl_level, "%02x%02x",
2879 card->info.mcl_level[2],
2880 card->info.mcl_level[3]);
2881 break;
2882 }
2883 fallthrough;
2884 case QETH_CARD_TYPE_IQD:
2885 if (IS_VM_NIC(card) || (card->info.mcl_level[0] & 0x80)) {
2886 card->info.mcl_level[0] = (char) _ebcasc[(__u8)
2887 card->info.mcl_level[0]];
2888 card->info.mcl_level[1] = (char) _ebcasc[(__u8)
2889 card->info.mcl_level[1]];
2890 card->info.mcl_level[2] = (char) _ebcasc[(__u8)
2891 card->info.mcl_level[2]];
2892 card->info.mcl_level[3] = (char) _ebcasc[(__u8)
2893 card->info.mcl_level[3]];
2894 card->info.mcl_level[QETH_MCL_LENGTH] = 0;
2895 }
2896 break;
2897 default:
2898 memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1);
2899 }
2900 dev_info(&card->gdev->dev,
2901 "Device is a%s card%s%s%s\nwith link type %s.\n",
2902 qeth_get_cardname(card),
2903 (card->info.mcl_level[0]) ? " (level: " : "",
2904 (card->info.mcl_level[0]) ? card->info.mcl_level : "",
2905 (card->info.mcl_level[0]) ? ")" : "",
2906 qeth_get_cardname_short(card));
2907 }
2908
2909 static void qeth_initialize_working_pool_list(struct qeth_card *card)
2910 {
2911 struct qeth_buffer_pool_entry *entry;
2912
2913 QETH_CARD_TEXT(card, 5, "inwrklst");
2914
2915 list_for_each_entry(entry,
2916 &card->qdio.init_pool.entry_list, init_list) {
2917 qeth_put_buffer_pool_entry(card, entry);
2918 }
2919 }
2920
2921 static struct qeth_buffer_pool_entry *qeth_find_free_buffer_pool_entry(
2922 struct qeth_card *card)
2923 {
2924 struct qeth_buffer_pool_entry *entry;
2925 int i, free;
2926
2927 if (list_empty(&card->qdio.in_buf_pool.entry_list))
2928 return NULL;
2929
2930 list_for_each_entry(entry, &card->qdio.in_buf_pool.entry_list, list) {
2931 free = 1;
2932 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2933 if (page_count(entry->elements[i]) > 1) {
2934 free = 0;
2935 break;
2936 }
2937 }
2938 if (free) {
2939 list_del_init(&entry->list);
2940 return entry;
2941 }
2942 }
2943
2944 /* no free buffer in pool so take first one and swap pages */
2945 entry = list_first_entry(&card->qdio.in_buf_pool.entry_list,
2946 struct qeth_buffer_pool_entry, list);
2947 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2948 if (page_count(entry->elements[i]) > 1) {
2949 struct page *page = dev_alloc_page();
2950
2951 if (!page)
2952 return NULL;
2953
2954 __free_page(entry->elements[i]);
2955 entry->elements[i] = page;
2956 QETH_CARD_STAT_INC(card, rx_sg_alloc_page);
2957 }
2958 }
2959 list_del_init(&entry->list);
2960 return entry;
2961 }
2962
2963 static int qeth_init_input_buffer(struct qeth_card *card,
2964 struct qeth_qdio_buffer *buf)
2965 {
2966 struct qeth_buffer_pool_entry *pool_entry = buf->pool_entry;
2967 int i;
2968
2969 if ((card->options.cq == QETH_CQ_ENABLED) && (!buf->rx_skb)) {
2970 buf->rx_skb = netdev_alloc_skb(card->dev,
2971 ETH_HLEN +
2972 sizeof(struct ipv6hdr));
2973 if (!buf->rx_skb)
2974 return -ENOMEM;
2975 }
2976
2977 if (!pool_entry) {
2978 pool_entry = qeth_find_free_buffer_pool_entry(card);
2979 if (!pool_entry)
2980 return -ENOBUFS;
2981
2982 buf->pool_entry = pool_entry;
2983 }
2984
2985 /*
2986 * since the buffer is accessed only from the input_tasklet
2987 * there shouldn't be a need to synchronize; also, since we use
2988 * the QETH_IN_BUF_REQUEUE_THRESHOLD we should never run out off
2989 * buffers
2990 */
2991 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2992 buf->buffer->element[i].length = PAGE_SIZE;
2993 buf->buffer->element[i].addr =
2994 page_to_phys(pool_entry->elements[i]);
2995 if (i == QETH_MAX_BUFFER_ELEMENTS(card) - 1)
2996 buf->buffer->element[i].eflags = SBAL_EFLAGS_LAST_ENTRY;
2997 else
2998 buf->buffer->element[i].eflags = 0;
2999 buf->buffer->element[i].sflags = 0;
3000 }
3001 return 0;
3002 }
3003
3004 static unsigned int qeth_tx_select_bulk_max(struct qeth_card *card,
3005 struct qeth_qdio_out_q *queue)
3006 {
3007 if (!IS_IQD(card) ||
3008 qeth_iqd_is_mcast_queue(card, queue) ||
3009 card->options.cq == QETH_CQ_ENABLED ||
3010 qdio_get_ssqd_desc(CARD_DDEV(card), &card->ssqd))
3011 return 1;
3012
3013 return card->ssqd.mmwc ? card->ssqd.mmwc : 1;
3014 }
3015
3016 static int qeth_init_qdio_queues(struct qeth_card *card)
3017 {
3018 unsigned int rx_bufs = card->qdio.in_buf_pool.buf_count;
3019 unsigned int i;
3020 int rc;
3021
3022 QETH_CARD_TEXT(card, 2, "initqdqs");
3023
3024 /* inbound queue */
3025 qdio_reset_buffers(card->qdio.in_q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
3026 memset(&card->rx, 0, sizeof(struct qeth_rx));
3027
3028 qeth_initialize_working_pool_list(card);
3029 /*give only as many buffers to hardware as we have buffer pool entries*/
3030 for (i = 0; i < rx_bufs; i++) {
3031 rc = qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]);
3032 if (rc)
3033 return rc;
3034 }
3035
3036 card->qdio.in_q->next_buf_to_init = QDIO_BUFNR(rx_bufs);
3037 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0, 0, rx_bufs);
3038 if (rc) {
3039 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
3040 return rc;
3041 }
3042
3043 /* completion */
3044 rc = qeth_cq_init(card);
3045 if (rc) {
3046 return rc;
3047 }
3048
3049 /* outbound queue */
3050 for (i = 0; i < card->qdio.no_out_queues; ++i) {
3051 struct qeth_qdio_out_q *queue = card->qdio.out_qs[i];
3052
3053 qdio_reset_buffers(queue->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
3054 queue->max_elements = QETH_MAX_BUFFER_ELEMENTS(card);
3055 queue->next_buf_to_fill = 0;
3056 queue->do_pack = 0;
3057 queue->prev_hdr = NULL;
3058 queue->coalesced_frames = 0;
3059 queue->bulk_start = 0;
3060 queue->bulk_count = 0;
3061 queue->bulk_max = qeth_tx_select_bulk_max(card, queue);
3062 atomic_set(&queue->used_buffers, 0);
3063 atomic_set(&queue->set_pci_flags_count, 0);
3064 netdev_tx_reset_queue(netdev_get_tx_queue(card->dev, i));
3065 }
3066 return 0;
3067 }
3068
3069 static void qeth_ipa_finalize_cmd(struct qeth_card *card,
3070 struct qeth_cmd_buffer *iob)
3071 {
3072 qeth_mpc_finalize_cmd(card, iob);
3073
3074 /* override with IPA-specific values: */
3075 __ipa_cmd(iob)->hdr.seqno = card->seqno.ipa++;
3076 }
3077
3078 void qeth_prepare_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
3079 u16 cmd_length,
3080 bool (*match)(struct qeth_cmd_buffer *iob,
3081 struct qeth_cmd_buffer *reply))
3082 {
3083 u8 prot_type = qeth_mpc_select_prot_type(card);
3084 u16 total_length = iob->length;
3085
3086 qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, total_length,
3087 iob->data);
3088 iob->finalize = qeth_ipa_finalize_cmd;
3089 iob->match = match;
3090
3091 memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
3092 memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &total_length, 2);
3093 memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1);
3094 memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &cmd_length, 2);
3095 memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &cmd_length, 2);
3096 memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
3097 &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
3098 memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &cmd_length, 2);
3099 }
3100 EXPORT_SYMBOL_GPL(qeth_prepare_ipa_cmd);
3101
3102 static bool qeth_ipa_match_reply(struct qeth_cmd_buffer *iob,
3103 struct qeth_cmd_buffer *reply)
3104 {
3105 struct qeth_ipa_cmd *ipa_reply = __ipa_reply(reply);
3106
3107 return ipa_reply && (__ipa_cmd(iob)->hdr.seqno == ipa_reply->hdr.seqno);
3108 }
3109
3110 struct qeth_cmd_buffer *qeth_ipa_alloc_cmd(struct qeth_card *card,
3111 enum qeth_ipa_cmds cmd_code,
3112 enum qeth_prot_versions prot,
3113 unsigned int data_length)
3114 {
3115 struct qeth_cmd_buffer *iob;
3116 struct qeth_ipacmd_hdr *hdr;
3117
3118 data_length += offsetof(struct qeth_ipa_cmd, data);
3119 iob = qeth_alloc_cmd(&card->write, IPA_PDU_HEADER_SIZE + data_length, 1,
3120 QETH_IPA_TIMEOUT);
3121 if (!iob)
3122 return NULL;
3123
3124 qeth_prepare_ipa_cmd(card, iob, data_length, qeth_ipa_match_reply);
3125
3126 hdr = &__ipa_cmd(iob)->hdr;
3127 hdr->command = cmd_code;
3128 hdr->initiator = IPA_CMD_INITIATOR_HOST;
3129 /* hdr->seqno is set by qeth_send_control_data() */
3130 hdr->adapter_type = QETH_LINK_TYPE_FAST_ETH;
3131 hdr->rel_adapter_no = (u8) card->dev->dev_port;
3132 hdr->prim_version_no = IS_LAYER2(card) ? 2 : 1;
3133 hdr->param_count = 1;
3134 hdr->prot_version = prot;
3135 return iob;
3136 }
3137 EXPORT_SYMBOL_GPL(qeth_ipa_alloc_cmd);
3138
3139 static int qeth_send_ipa_cmd_cb(struct qeth_card *card,
3140 struct qeth_reply *reply, unsigned long data)
3141 {
3142 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3143
3144 return (cmd->hdr.return_code) ? -EIO : 0;
3145 }
3146
3147 /**
3148 * qeth_send_ipa_cmd() - send an IPA command
3149 *
3150 * See qeth_send_control_data() for explanation of the arguments.
3151 */
3152
3153 int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
3154 int (*reply_cb)(struct qeth_card *, struct qeth_reply*,
3155 unsigned long),
3156 void *reply_param)
3157 {
3158 int rc;
3159
3160 QETH_CARD_TEXT(card, 4, "sendipa");
3161
3162 if (card->read_or_write_problem) {
3163 qeth_put_cmd(iob);
3164 return -EIO;
3165 }
3166
3167 if (reply_cb == NULL)
3168 reply_cb = qeth_send_ipa_cmd_cb;
3169 rc = qeth_send_control_data(card, iob, reply_cb, reply_param);
3170 if (rc == -ETIME) {
3171 qeth_clear_ipacmd_list(card);
3172 qeth_schedule_recovery(card);
3173 }
3174 return rc;
3175 }
3176 EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd);
3177
3178 static int qeth_send_startlan_cb(struct qeth_card *card,
3179 struct qeth_reply *reply, unsigned long data)
3180 {
3181 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3182
3183 if (cmd->hdr.return_code == IPA_RC_LAN_OFFLINE)
3184 return -ENETDOWN;
3185
3186 return (cmd->hdr.return_code) ? -EIO : 0;
3187 }
3188
3189 static int qeth_send_startlan(struct qeth_card *card)
3190 {
3191 struct qeth_cmd_buffer *iob;
3192
3193 QETH_CARD_TEXT(card, 2, "strtlan");
3194
3195 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_STARTLAN, QETH_PROT_NONE, 0);
3196 if (!iob)
3197 return -ENOMEM;
3198 return qeth_send_ipa_cmd(card, iob, qeth_send_startlan_cb, NULL);
3199 }
3200
3201 static int qeth_setadpparms_inspect_rc(struct qeth_ipa_cmd *cmd)
3202 {
3203 if (!cmd->hdr.return_code)
3204 cmd->hdr.return_code =
3205 cmd->data.setadapterparms.hdr.return_code;
3206 return cmd->hdr.return_code;
3207 }
3208
3209 static int qeth_query_setadapterparms_cb(struct qeth_card *card,
3210 struct qeth_reply *reply, unsigned long data)
3211 {
3212 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3213 struct qeth_query_cmds_supp *query_cmd;
3214
3215 QETH_CARD_TEXT(card, 3, "quyadpcb");
3216 if (qeth_setadpparms_inspect_rc(cmd))
3217 return -EIO;
3218
3219 query_cmd = &cmd->data.setadapterparms.data.query_cmds_supp;
3220 if (query_cmd->lan_type & 0x7f) {
3221 if (!qeth_is_supported_link_type(card, query_cmd->lan_type))
3222 return -EPROTONOSUPPORT;
3223
3224 card->info.link_type = query_cmd->lan_type;
3225 QETH_CARD_TEXT_(card, 2, "lnk %d", card->info.link_type);
3226 }
3227
3228 card->options.adp.supported = query_cmd->supported_cmds;
3229 return 0;
3230 }
3231
3232 static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card,
3233 enum qeth_ipa_setadp_cmd adp_cmd,
3234 unsigned int data_length)
3235 {
3236 struct qeth_ipacmd_setadpparms_hdr *hdr;
3237 struct qeth_cmd_buffer *iob;
3238
3239 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETADAPTERPARMS, QETH_PROT_IPV4,
3240 data_length +
3241 offsetof(struct qeth_ipacmd_setadpparms,
3242 data));
3243 if (!iob)
3244 return NULL;
3245
3246 hdr = &__ipa_cmd(iob)->data.setadapterparms.hdr;
3247 hdr->cmdlength = sizeof(*hdr) + data_length;
3248 hdr->command_code = adp_cmd;
3249 hdr->used_total = 1;
3250 hdr->seq_no = 1;
3251 return iob;
3252 }
3253
3254 static int qeth_query_setadapterparms(struct qeth_card *card)
3255 {
3256 int rc;
3257 struct qeth_cmd_buffer *iob;
3258
3259 QETH_CARD_TEXT(card, 3, "queryadp");
3260 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_COMMANDS_SUPPORTED,
3261 SETADP_DATA_SIZEOF(query_cmds_supp));
3262 if (!iob)
3263 return -ENOMEM;
3264 rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL);
3265 return rc;
3266 }
3267
3268 static int qeth_query_ipassists_cb(struct qeth_card *card,
3269 struct qeth_reply *reply, unsigned long data)
3270 {
3271 struct qeth_ipa_cmd *cmd;
3272
3273 QETH_CARD_TEXT(card, 2, "qipasscb");
3274
3275 cmd = (struct qeth_ipa_cmd *) data;
3276
3277 switch (cmd->hdr.return_code) {
3278 case IPA_RC_SUCCESS:
3279 break;
3280 case IPA_RC_NOTSUPP:
3281 case IPA_RC_L2_UNSUPPORTED_CMD:
3282 QETH_CARD_TEXT(card, 2, "ipaunsup");
3283 card->options.ipa4.supported |= IPA_SETADAPTERPARMS;
3284 card->options.ipa6.supported |= IPA_SETADAPTERPARMS;
3285 return -EOPNOTSUPP;
3286 default:
3287 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Unhandled rc=%#x\n",
3288 CARD_DEVID(card), cmd->hdr.return_code);
3289 return -EIO;
3290 }
3291
3292 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
3293 card->options.ipa4 = cmd->hdr.assists;
3294 else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
3295 card->options.ipa6 = cmd->hdr.assists;
3296 else
3297 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Flawed LIC detected\n",
3298 CARD_DEVID(card));
3299 return 0;
3300 }
3301
3302 static int qeth_query_ipassists(struct qeth_card *card,
3303 enum qeth_prot_versions prot)
3304 {
3305 int rc;
3306 struct qeth_cmd_buffer *iob;
3307
3308 QETH_CARD_TEXT_(card, 2, "qipassi%i", prot);
3309 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_QIPASSIST, prot, 0);
3310 if (!iob)
3311 return -ENOMEM;
3312 rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL);
3313 return rc;
3314 }
3315
3316 static int qeth_query_switch_attributes_cb(struct qeth_card *card,
3317 struct qeth_reply *reply, unsigned long data)
3318 {
3319 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3320 struct qeth_query_switch_attributes *attrs;
3321 struct qeth_switch_info *sw_info;
3322
3323 QETH_CARD_TEXT(card, 2, "qswiatcb");
3324 if (qeth_setadpparms_inspect_rc(cmd))
3325 return -EIO;
3326
3327 sw_info = (struct qeth_switch_info *)reply->param;
3328 attrs = &cmd->data.setadapterparms.data.query_switch_attributes;
3329 sw_info->capabilities = attrs->capabilities;
3330 sw_info->settings = attrs->settings;
3331 QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities,
3332 sw_info->settings);
3333 return 0;
3334 }
3335
3336 int qeth_query_switch_attributes(struct qeth_card *card,
3337 struct qeth_switch_info *sw_info)
3338 {
3339 struct qeth_cmd_buffer *iob;
3340
3341 QETH_CARD_TEXT(card, 2, "qswiattr");
3342 if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES))
3343 return -EOPNOTSUPP;
3344 if (!netif_carrier_ok(card->dev))
3345 return -ENOMEDIUM;
3346 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES, 0);
3347 if (!iob)
3348 return -ENOMEM;
3349 return qeth_send_ipa_cmd(card, iob,
3350 qeth_query_switch_attributes_cb, sw_info);
3351 }
3352
3353 struct qeth_cmd_buffer *qeth_get_diag_cmd(struct qeth_card *card,
3354 enum qeth_diags_cmds sub_cmd,
3355 unsigned int data_length)
3356 {
3357 struct qeth_ipacmd_diagass *cmd;
3358 struct qeth_cmd_buffer *iob;
3359
3360 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SET_DIAG_ASS, QETH_PROT_NONE,
3361 DIAG_HDR_LEN + data_length);
3362 if (!iob)
3363 return NULL;
3364
3365 cmd = &__ipa_cmd(iob)->data.diagass;
3366 cmd->subcmd_len = DIAG_SUB_HDR_LEN + data_length;
3367 cmd->subcmd = sub_cmd;
3368 return iob;
3369 }
3370 EXPORT_SYMBOL_GPL(qeth_get_diag_cmd);
3371
3372 static int qeth_query_setdiagass_cb(struct qeth_card *card,
3373 struct qeth_reply *reply, unsigned long data)
3374 {
3375 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3376 u16 rc = cmd->hdr.return_code;
3377
3378 if (rc) {
3379 QETH_CARD_TEXT_(card, 2, "diagq:%x", rc);
3380 return -EIO;
3381 }
3382
3383 card->info.diagass_support = cmd->data.diagass.ext;
3384 return 0;
3385 }
3386
3387 static int qeth_query_setdiagass(struct qeth_card *card)
3388 {
3389 struct qeth_cmd_buffer *iob;
3390
3391 QETH_CARD_TEXT(card, 2, "qdiagass");
3392 iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_QUERY, 0);
3393 if (!iob)
3394 return -ENOMEM;
3395 return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL);
3396 }
3397
3398 static void qeth_get_trap_id(struct qeth_card *card, struct qeth_trap_id *tid)
3399 {
3400 unsigned long info = get_zeroed_page(GFP_KERNEL);
3401 struct sysinfo_2_2_2 *info222 = (struct sysinfo_2_2_2 *)info;
3402 struct sysinfo_3_2_2 *info322 = (struct sysinfo_3_2_2 *)info;
3403 struct ccw_dev_id ccwid;
3404 int level;
3405
3406 tid->chpid = card->info.chpid;
3407 ccw_device_get_id(CARD_RDEV(card), &ccwid);
3408 tid->ssid = ccwid.ssid;
3409 tid->devno = ccwid.devno;
3410 if (!info)
3411 return;
3412 level = stsi(NULL, 0, 0, 0);
3413 if ((level >= 2) && (stsi(info222, 2, 2, 2) == 0))
3414 tid->lparnr = info222->lpar_number;
3415 if ((level >= 3) && (stsi(info322, 3, 2, 2) == 0)) {
3416 EBCASC(info322->vm[0].name, sizeof(info322->vm[0].name));
3417 memcpy(tid->vmname, info322->vm[0].name, sizeof(tid->vmname));
3418 }
3419 free_page(info);
3420 }
3421
3422 static int qeth_hw_trap_cb(struct qeth_card *card,
3423 struct qeth_reply *reply, unsigned long data)
3424 {
3425 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3426 u16 rc = cmd->hdr.return_code;
3427
3428 if (rc) {
3429 QETH_CARD_TEXT_(card, 2, "trapc:%x", rc);
3430 return -EIO;
3431 }
3432 return 0;
3433 }
3434
3435 int qeth_hw_trap(struct qeth_card *card, enum qeth_diags_trap_action action)
3436 {
3437 struct qeth_cmd_buffer *iob;
3438 struct qeth_ipa_cmd *cmd;
3439
3440 QETH_CARD_TEXT(card, 2, "diagtrap");
3441 iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_TRAP, 64);
3442 if (!iob)
3443 return -ENOMEM;
3444 cmd = __ipa_cmd(iob);
3445 cmd->data.diagass.type = 1;
3446 cmd->data.diagass.action = action;
3447 switch (action) {
3448 case QETH_DIAGS_TRAP_ARM:
3449 cmd->data.diagass.options = 0x0003;
3450 cmd->data.diagass.ext = 0x00010000 +
3451 sizeof(struct qeth_trap_id);
3452 qeth_get_trap_id(card,
3453 (struct qeth_trap_id *)cmd->data.diagass.cdata);
3454 break;
3455 case QETH_DIAGS_TRAP_DISARM:
3456 cmd->data.diagass.options = 0x0001;
3457 break;
3458 case QETH_DIAGS_TRAP_CAPTURE:
3459 break;
3460 }
3461 return qeth_send_ipa_cmd(card, iob, qeth_hw_trap_cb, NULL);
3462 }
3463
3464 static int qeth_check_qdio_errors(struct qeth_card *card,
3465 struct qdio_buffer *buf,
3466 unsigned int qdio_error,
3467 const char *dbftext)
3468 {
3469 if (qdio_error) {
3470 QETH_CARD_TEXT(card, 2, dbftext);
3471 QETH_CARD_TEXT_(card, 2, " F15=%02X",
3472 buf->element[15].sflags);
3473 QETH_CARD_TEXT_(card, 2, " F14=%02X",
3474 buf->element[14].sflags);
3475 QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error);
3476 if ((buf->element[15].sflags) == 0x12) {
3477 QETH_CARD_STAT_INC(card, rx_fifo_errors);
3478 return 0;
3479 } else
3480 return 1;
3481 }
3482 return 0;
3483 }
3484
3485 static unsigned int qeth_rx_refill_queue(struct qeth_card *card,
3486 unsigned int count)
3487 {
3488 struct qeth_qdio_q *queue = card->qdio.in_q;
3489 struct list_head *lh;
3490 int i;
3491 int rc;
3492 int newcount = 0;
3493
3494 /* only requeue at a certain threshold to avoid SIGAs */
3495 if (count >= QETH_IN_BUF_REQUEUE_THRESHOLD(card)) {
3496 for (i = queue->next_buf_to_init;
3497 i < queue->next_buf_to_init + count; ++i) {
3498 if (qeth_init_input_buffer(card,
3499 &queue->bufs[QDIO_BUFNR(i)])) {
3500 break;
3501 } else {
3502 newcount++;
3503 }
3504 }
3505
3506 if (newcount < count) {
3507 /* we are in memory shortage so we switch back to
3508 traditional skb allocation and drop packages */
3509 atomic_set(&card->force_alloc_skb, 3);
3510 count = newcount;
3511 } else {
3512 atomic_add_unless(&card->force_alloc_skb, -1, 0);
3513 }
3514
3515 if (!count) {
3516 i = 0;
3517 list_for_each(lh, &card->qdio.in_buf_pool.entry_list)
3518 i++;
3519 if (i == card->qdio.in_buf_pool.buf_count) {
3520 QETH_CARD_TEXT(card, 2, "qsarbw");
3521 schedule_delayed_work(
3522 &card->buffer_reclaim_work,
3523 QETH_RECLAIM_WORK_TIME);
3524 }
3525 return 0;
3526 }
3527
3528 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0,
3529 queue->next_buf_to_init, count);
3530 if (rc) {
3531 QETH_CARD_TEXT(card, 2, "qinberr");
3532 }
3533 queue->next_buf_to_init = QDIO_BUFNR(queue->next_buf_to_init +
3534 count);
3535 return count;
3536 }
3537
3538 return 0;
3539 }
3540
3541 static void qeth_buffer_reclaim_work(struct work_struct *work)
3542 {
3543 struct qeth_card *card = container_of(to_delayed_work(work),
3544 struct qeth_card,
3545 buffer_reclaim_work);
3546
3547 local_bh_disable();
3548 napi_schedule(&card->napi);
3549 /* kick-start the NAPI softirq: */
3550 local_bh_enable();
3551 }
3552
3553 static void qeth_handle_send_error(struct qeth_card *card,
3554 struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err)
3555 {
3556 int sbalf15 = buffer->buffer->element[15].sflags;
3557
3558 QETH_CARD_TEXT(card, 6, "hdsnderr");
3559 qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr");
3560
3561 if (!qdio_err)
3562 return;
3563
3564 if ((sbalf15 >= 15) && (sbalf15 <= 31))
3565 return;
3566
3567 QETH_CARD_TEXT(card, 1, "lnkfail");
3568 QETH_CARD_TEXT_(card, 1, "%04x %02x",
3569 (u16)qdio_err, (u8)sbalf15);
3570 }
3571
3572 /**
3573 * qeth_prep_flush_pack_buffer - Prepares flushing of a packing buffer.
3574 * @queue: queue to check for packing buffer
3575 *
3576 * Returns number of buffers that were prepared for flush.
3577 */
3578 static int qeth_prep_flush_pack_buffer(struct qeth_qdio_out_q *queue)
3579 {
3580 struct qeth_qdio_out_buffer *buffer;
3581
3582 buffer = queue->bufs[queue->next_buf_to_fill];
3583 if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) &&
3584 (buffer->next_element_to_fill > 0)) {
3585 /* it's a packing buffer */
3586 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3587 queue->next_buf_to_fill =
3588 QDIO_BUFNR(queue->next_buf_to_fill + 1);
3589 return 1;
3590 }
3591 return 0;
3592 }
3593
3594 /*
3595 * Switched to packing state if the number of used buffers on a queue
3596 * reaches a certain limit.
3597 */
3598 static void qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q *queue)
3599 {
3600 if (!queue->do_pack) {
3601 if (atomic_read(&queue->used_buffers)
3602 >= QETH_HIGH_WATERMARK_PACK){
3603 /* switch non-PACKING -> PACKING */
3604 QETH_CARD_TEXT(queue->card, 6, "np->pack");
3605 QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3606 queue->do_pack = 1;
3607 }
3608 }
3609 }
3610
3611 /*
3612 * Switches from packing to non-packing mode. If there is a packing
3613 * buffer on the queue this buffer will be prepared to be flushed.
3614 * In that case 1 is returned to inform the caller. If no buffer
3615 * has to be flushed, zero is returned.
3616 */
3617 static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue)
3618 {
3619 if (queue->do_pack) {
3620 if (atomic_read(&queue->used_buffers)
3621 <= QETH_LOW_WATERMARK_PACK) {
3622 /* switch PACKING -> non-PACKING */
3623 QETH_CARD_TEXT(queue->card, 6, "pack->np");
3624 QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3625 queue->do_pack = 0;
3626 return qeth_prep_flush_pack_buffer(queue);
3627 }
3628 }
3629 return 0;
3630 }
3631
3632 static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
3633 int count)
3634 {
3635 struct qeth_qdio_out_buffer *buf = queue->bufs[index];
3636 unsigned int qdio_flags = QDIO_FLAG_SYNC_OUTPUT;
3637 struct qeth_card *card = queue->card;
3638 int rc;
3639 int i;
3640
3641 for (i = index; i < index + count; ++i) {
3642 unsigned int bidx = QDIO_BUFNR(i);
3643 struct sk_buff *skb;
3644
3645 buf = queue->bufs[bidx];
3646 buf->buffer->element[buf->next_element_to_fill - 1].eflags |=
3647 SBAL_EFLAGS_LAST_ENTRY;
3648 queue->coalesced_frames += buf->frames;
3649
3650 if (queue->bufstates)
3651 queue->bufstates[bidx].user = buf;
3652
3653 if (IS_IQD(card)) {
3654 skb_queue_walk(&buf->skb_list, skb)
3655 skb_tx_timestamp(skb);
3656 }
3657 }
3658
3659 if (!IS_IQD(card)) {
3660 if (!queue->do_pack) {
3661 if ((atomic_read(&queue->used_buffers) >=
3662 (QETH_HIGH_WATERMARK_PACK -
3663 QETH_WATERMARK_PACK_FUZZ)) &&
3664 !atomic_read(&queue->set_pci_flags_count)) {
3665 /* it's likely that we'll go to packing
3666 * mode soon */
3667 atomic_inc(&queue->set_pci_flags_count);
3668 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3669 }
3670 } else {
3671 if (!atomic_read(&queue->set_pci_flags_count)) {
3672 /*
3673 * there's no outstanding PCI any more, so we
3674 * have to request a PCI to be sure the the PCI
3675 * will wake at some time in the future then we
3676 * can flush packed buffers that might still be
3677 * hanging around, which can happen if no
3678 * further send was requested by the stack
3679 */
3680 atomic_inc(&queue->set_pci_flags_count);
3681 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3682 }
3683 }
3684
3685 if (atomic_read(&queue->set_pci_flags_count))
3686 qdio_flags |= QDIO_FLAG_PCI_OUT;
3687 }
3688
3689 QETH_TXQ_STAT_INC(queue, doorbell);
3690 rc = do_QDIO(CARD_DDEV(queue->card), qdio_flags,
3691 queue->queue_no, index, count);
3692
3693 /* Fake the TX completion interrupt: */
3694 if (IS_IQD(card)) {
3695 unsigned int frames = READ_ONCE(queue->max_coalesced_frames);
3696 unsigned int usecs = READ_ONCE(queue->coalesce_usecs);
3697
3698 if (frames && queue->coalesced_frames >= frames) {
3699 napi_schedule(&queue->napi);
3700 queue->coalesced_frames = 0;
3701 QETH_TXQ_STAT_INC(queue, coal_frames);
3702 } else if (usecs) {
3703 qeth_tx_arm_timer(queue, usecs);
3704 }
3705 }
3706
3707 if (rc) {
3708 /* ignore temporary SIGA errors without busy condition */
3709 if (rc == -ENOBUFS)
3710 return;
3711 QETH_CARD_TEXT(queue->card, 2, "flushbuf");
3712 QETH_CARD_TEXT_(queue->card, 2, " q%d", queue->queue_no);
3713 QETH_CARD_TEXT_(queue->card, 2, " idx%d", index);
3714 QETH_CARD_TEXT_(queue->card, 2, " c%d", count);
3715 QETH_CARD_TEXT_(queue->card, 2, " err%d", rc);
3716
3717 /* this must not happen under normal circumstances. if it
3718 * happens something is really wrong -> recover */
3719 qeth_schedule_recovery(queue->card);
3720 return;
3721 }
3722 }
3723
3724 static void qeth_flush_queue(struct qeth_qdio_out_q *queue)
3725 {
3726 qeth_flush_buffers(queue, queue->bulk_start, queue->bulk_count);
3727
3728 queue->bulk_start = QDIO_BUFNR(queue->bulk_start + queue->bulk_count);
3729 queue->prev_hdr = NULL;
3730 queue->bulk_count = 0;
3731 }
3732
3733 static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue)
3734 {
3735 /*
3736 * check if weed have to switch to non-packing mode or if
3737 * we have to get a pci flag out on the queue
3738 */
3739 if ((atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) ||
3740 !atomic_read(&queue->set_pci_flags_count)) {
3741 unsigned int index, flush_cnt;
3742 bool q_was_packing;
3743
3744 spin_lock(&queue->lock);
3745
3746 index = queue->next_buf_to_fill;
3747 q_was_packing = queue->do_pack;
3748
3749 flush_cnt = qeth_switch_to_nonpacking_if_needed(queue);
3750 if (!flush_cnt && !atomic_read(&queue->set_pci_flags_count))
3751 flush_cnt = qeth_prep_flush_pack_buffer(queue);
3752
3753 if (flush_cnt) {
3754 qeth_flush_buffers(queue, index, flush_cnt);
3755 if (q_was_packing)
3756 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_cnt);
3757 }
3758
3759 spin_unlock(&queue->lock);
3760 }
3761 }
3762
3763 static void qeth_qdio_poll(struct ccw_device *cdev, unsigned long card_ptr)
3764 {
3765 struct qeth_card *card = (struct qeth_card *)card_ptr;
3766
3767 napi_schedule_irqoff(&card->napi);
3768 }
3769
3770 int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq)
3771 {
3772 int rc;
3773
3774 if (card->options.cq == QETH_CQ_NOTAVAILABLE) {
3775 rc = -1;
3776 goto out;
3777 } else {
3778 if (card->options.cq == cq) {
3779 rc = 0;
3780 goto out;
3781 }
3782
3783 qeth_free_qdio_queues(card);
3784 card->options.cq = cq;
3785 rc = 0;
3786 }
3787 out:
3788 return rc;
3789
3790 }
3791 EXPORT_SYMBOL_GPL(qeth_configure_cq);
3792
3793 static void qeth_qdio_cq_handler(struct qeth_card *card, unsigned int qdio_err,
3794 unsigned int queue, int first_element,
3795 int count)
3796 {
3797 struct qeth_qdio_q *cq = card->qdio.c_q;
3798 int i;
3799 int rc;
3800
3801 QETH_CARD_TEXT_(card, 5, "qcqhe%d", first_element);
3802 QETH_CARD_TEXT_(card, 5, "qcqhc%d", count);
3803 QETH_CARD_TEXT_(card, 5, "qcqherr%d", qdio_err);
3804
3805 if (qdio_err) {
3806 netif_tx_stop_all_queues(card->dev);
3807 qeth_schedule_recovery(card);
3808 return;
3809 }
3810
3811 for (i = first_element; i < first_element + count; ++i) {
3812 struct qdio_buffer *buffer = cq->qdio_bufs[QDIO_BUFNR(i)];
3813 int e = 0;
3814
3815 while ((e < QDIO_MAX_ELEMENTS_PER_BUFFER) &&
3816 buffer->element[e].addr) {
3817 unsigned long phys_aob_addr = buffer->element[e].addr;
3818
3819 qeth_qdio_handle_aob(card, phys_aob_addr);
3820 ++e;
3821 }
3822 qeth_scrub_qdio_buffer(buffer, QDIO_MAX_ELEMENTS_PER_BUFFER);
3823 }
3824 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, queue,
3825 card->qdio.c_q->next_buf_to_init,
3826 count);
3827 if (rc) {
3828 dev_warn(&card->gdev->dev,
3829 "QDIO reported an error, rc=%i\n", rc);
3830 QETH_CARD_TEXT(card, 2, "qcqherr");
3831 }
3832
3833 cq->next_buf_to_init = QDIO_BUFNR(cq->next_buf_to_init + count);
3834 }
3835
3836 static void qeth_qdio_input_handler(struct ccw_device *ccwdev,
3837 unsigned int qdio_err, int queue,
3838 int first_elem, int count,
3839 unsigned long card_ptr)
3840 {
3841 struct qeth_card *card = (struct qeth_card *)card_ptr;
3842
3843 QETH_CARD_TEXT_(card, 2, "qihq%d", queue);
3844 QETH_CARD_TEXT_(card, 2, "qiec%d", qdio_err);
3845
3846 if (qdio_err)
3847 qeth_schedule_recovery(card);
3848 }
3849
3850 static void qeth_qdio_output_handler(struct ccw_device *ccwdev,
3851 unsigned int qdio_error, int __queue,
3852 int first_element, int count,
3853 unsigned long card_ptr)
3854 {
3855 struct qeth_card *card = (struct qeth_card *) card_ptr;
3856 struct qeth_qdio_out_q *queue = card->qdio.out_qs[__queue];
3857 struct net_device *dev = card->dev;
3858 struct netdev_queue *txq;
3859 int i;
3860
3861 QETH_CARD_TEXT(card, 6, "qdouhdl");
3862 if (qdio_error & QDIO_ERROR_FATAL) {
3863 QETH_CARD_TEXT(card, 2, "achkcond");
3864 netif_tx_stop_all_queues(dev);
3865 qeth_schedule_recovery(card);
3866 return;
3867 }
3868
3869 for (i = first_element; i < (first_element + count); ++i) {
3870 struct qeth_qdio_out_buffer *buf = queue->bufs[QDIO_BUFNR(i)];
3871
3872 qeth_handle_send_error(card, buf, qdio_error);
3873 qeth_clear_output_buffer(queue, buf, qdio_error, 0);
3874 }
3875
3876 atomic_sub(count, &queue->used_buffers);
3877 qeth_check_outbound_queue(queue);
3878
3879 txq = netdev_get_tx_queue(dev, __queue);
3880 /* xmit may have observed the full-condition, but not yet stopped the
3881 * txq. In which case the code below won't trigger. So before returning,
3882 * xmit will re-check the txq's fill level and wake it up if needed.
3883 */
3884 if (netif_tx_queue_stopped(txq) && !qeth_out_queue_is_full(queue))
3885 netif_tx_wake_queue(txq);
3886 }
3887
3888 /**
3889 * Note: Function assumes that we have 4 outbound queues.
3890 */
3891 int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb)
3892 {
3893 struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
3894 u8 tos;
3895
3896 switch (card->qdio.do_prio_queueing) {
3897 case QETH_PRIO_Q_ING_TOS:
3898 case QETH_PRIO_Q_ING_PREC:
3899 switch (qeth_get_ip_version(skb)) {
3900 case 4:
3901 tos = ipv4_get_dsfield(ip_hdr(skb));
3902 break;
3903 case 6:
3904 tos = ipv6_get_dsfield(ipv6_hdr(skb));
3905 break;
3906 default:
3907 return card->qdio.default_out_queue;
3908 }
3909 if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC)
3910 return ~tos >> 6 & 3;
3911 if (tos & IPTOS_MINCOST)
3912 return 3;
3913 if (tos & IPTOS_RELIABILITY)
3914 return 2;
3915 if (tos & IPTOS_THROUGHPUT)
3916 return 1;
3917 if (tos & IPTOS_LOWDELAY)
3918 return 0;
3919 break;
3920 case QETH_PRIO_Q_ING_SKB:
3921 if (skb->priority > 5)
3922 return 0;
3923 return ~skb->priority >> 1 & 3;
3924 case QETH_PRIO_Q_ING_VLAN:
3925 if (veth->h_vlan_proto == htons(ETH_P_8021Q))
3926 return ~ntohs(veth->h_vlan_TCI) >>
3927 (VLAN_PRIO_SHIFT + 1) & 3;
3928 break;
3929 case QETH_PRIO_Q_ING_FIXED:
3930 return card->qdio.default_out_queue;
3931 default:
3932 break;
3933 }
3934 return card->qdio.default_out_queue;
3935 }
3936 EXPORT_SYMBOL_GPL(qeth_get_priority_queue);
3937
3938 /**
3939 * qeth_get_elements_for_frags() - find number of SBALEs for skb frags.
3940 * @skb: SKB address
3941 *
3942 * Returns the number of pages, and thus QDIO buffer elements, needed to cover
3943 * fragmented part of the SKB. Returns zero for linear SKB.
3944 */
3945 static int qeth_get_elements_for_frags(struct sk_buff *skb)
3946 {
3947 int cnt, elements = 0;
3948
3949 for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3950 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
3951
3952 elements += qeth_get_elements_for_range(
3953 (addr_t)skb_frag_address(frag),
3954 (addr_t)skb_frag_address(frag) + skb_frag_size(frag));
3955 }
3956 return elements;
3957 }
3958
3959 /**
3960 * qeth_count_elements() - Counts the number of QDIO buffer elements needed
3961 * to transmit an skb.
3962 * @skb: the skb to operate on.
3963 * @data_offset: skip this part of the skb's linear data
3964 *
3965 * Returns the number of pages, and thus QDIO buffer elements, needed to map the
3966 * skb's data (both its linear part and paged fragments).
3967 */
3968 unsigned int qeth_count_elements(struct sk_buff *skb, unsigned int data_offset)
3969 {
3970 unsigned int elements = qeth_get_elements_for_frags(skb);
3971 addr_t end = (addr_t)skb->data + skb_headlen(skb);
3972 addr_t start = (addr_t)skb->data + data_offset;
3973
3974 if (start != end)
3975 elements += qeth_get_elements_for_range(start, end);
3976 return elements;
3977 }
3978 EXPORT_SYMBOL_GPL(qeth_count_elements);
3979
3980 #define QETH_HDR_CACHE_OBJ_SIZE (sizeof(struct qeth_hdr_tso) + \
3981 MAX_TCP_HEADER)
3982
3983 /**
3984 * qeth_add_hw_header() - add a HW header to an skb.
3985 * @skb: skb that the HW header should be added to.
3986 * @hdr: double pointer to a qeth_hdr. When returning with >= 0,
3987 * it contains a valid pointer to a qeth_hdr.
3988 * @hdr_len: length of the HW header.
3989 * @proto_len: length of protocol headers that need to be in same page as the
3990 * HW header.
3991 *
3992 * Returns the pushed length. If the header can't be pushed on
3993 * (eg. because it would cross a page boundary), it is allocated from
3994 * the cache instead and 0 is returned.
3995 * The number of needed buffer elements is returned in @elements.
3996 * Error to create the hdr is indicated by returning with < 0.
3997 */
3998 static int qeth_add_hw_header(struct qeth_qdio_out_q *queue,
3999 struct sk_buff *skb, struct qeth_hdr **hdr,
4000 unsigned int hdr_len, unsigned int proto_len,
4001 unsigned int *elements)
4002 {
4003 gfp_t gfp = GFP_ATOMIC | (skb_pfmemalloc(skb) ? __GFP_MEMALLOC : 0);
4004 const unsigned int contiguous = proto_len ? proto_len : 1;
4005 const unsigned int max_elements = queue->max_elements;
4006 unsigned int __elements;
4007 addr_t start, end;
4008 bool push_ok;
4009 int rc;
4010
4011 check_layout:
4012 start = (addr_t)skb->data - hdr_len;
4013 end = (addr_t)skb->data;
4014
4015 if (qeth_get_elements_for_range(start, end + contiguous) == 1) {
4016 /* Push HW header into same page as first protocol header. */
4017 push_ok = true;
4018 /* ... but TSO always needs a separate element for headers: */
4019 if (skb_is_gso(skb))
4020 __elements = 1 + qeth_count_elements(skb, proto_len);
4021 else
4022 __elements = qeth_count_elements(skb, 0);
4023 } else if (!proto_len && PAGE_ALIGNED(skb->data)) {
4024 /* Push HW header into preceding page, flush with skb->data. */
4025 push_ok = true;
4026 __elements = 1 + qeth_count_elements(skb, 0);
4027 } else {
4028 /* Use header cache, copy protocol headers up. */
4029 push_ok = false;
4030 __elements = 1 + qeth_count_elements(skb, proto_len);
4031 }
4032
4033 /* Compress skb to fit into one IO buffer: */
4034 if (__elements > max_elements) {
4035 if (!skb_is_nonlinear(skb)) {
4036 /* Drop it, no easy way of shrinking it further. */
4037 QETH_DBF_MESSAGE(2, "Dropped an oversized skb (Max Elements=%u / Actual=%u / Length=%u).\n",
4038 max_elements, __elements, skb->len);
4039 return -E2BIG;
4040 }
4041
4042 rc = skb_linearize(skb);
4043 if (rc) {
4044 QETH_TXQ_STAT_INC(queue, skbs_linearized_fail);
4045 return rc;
4046 }
4047
4048 QETH_TXQ_STAT_INC(queue, skbs_linearized);
4049 /* Linearization changed the layout, re-evaluate: */
4050 goto check_layout;
4051 }
4052
4053 *elements = __elements;
4054 /* Add the header: */
4055 if (push_ok) {
4056 *hdr = skb_push(skb, hdr_len);
4057 return hdr_len;
4058 }
4059
4060 /* Fall back to cache element with known-good alignment: */
4061 if (hdr_len + proto_len > QETH_HDR_CACHE_OBJ_SIZE)
4062 return -E2BIG;
4063 *hdr = kmem_cache_alloc(qeth_core_header_cache, gfp);
4064 if (!*hdr)
4065 return -ENOMEM;
4066 /* Copy protocol headers behind HW header: */
4067 skb_copy_from_linear_data(skb, ((char *)*hdr) + hdr_len, proto_len);
4068 return 0;
4069 }
4070
4071 static bool qeth_iqd_may_bulk(struct qeth_qdio_out_q *queue,
4072 struct sk_buff *curr_skb,
4073 struct qeth_hdr *curr_hdr)
4074 {
4075 struct qeth_qdio_out_buffer *buffer = queue->bufs[queue->bulk_start];
4076 struct qeth_hdr *prev_hdr = queue->prev_hdr;
4077
4078 if (!prev_hdr)
4079 return true;
4080
4081 /* All packets must have the same target: */
4082 if (curr_hdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER2) {
4083 struct sk_buff *prev_skb = skb_peek(&buffer->skb_list);
4084
4085 return ether_addr_equal(eth_hdr(prev_skb)->h_dest,
4086 eth_hdr(curr_skb)->h_dest) &&
4087 qeth_l2_same_vlan(&prev_hdr->hdr.l2, &curr_hdr->hdr.l2);
4088 }
4089
4090 return qeth_l3_same_next_hop(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3) &&
4091 qeth_l3_iqd_same_vlan(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3);
4092 }
4093
4094 /**
4095 * qeth_fill_buffer() - map skb into an output buffer
4096 * @buf: buffer to transport the skb
4097 * @skb: skb to map into the buffer
4098 * @hdr: qeth_hdr for this skb. Either at skb->data, or allocated
4099 * from qeth_core_header_cache.
4100 * @offset: when mapping the skb, start at skb->data + offset
4101 * @hd_len: if > 0, build a dedicated header element of this size
4102 */
4103 static unsigned int qeth_fill_buffer(struct qeth_qdio_out_buffer *buf,
4104 struct sk_buff *skb, struct qeth_hdr *hdr,
4105 unsigned int offset, unsigned int hd_len)
4106 {
4107 struct qdio_buffer *buffer = buf->buffer;
4108 int element = buf->next_element_to_fill;
4109 int length = skb_headlen(skb) - offset;
4110 char *data = skb->data + offset;
4111 unsigned int elem_length, cnt;
4112 bool is_first_elem = true;
4113
4114 __skb_queue_tail(&buf->skb_list, skb);
4115
4116 /* build dedicated element for HW Header */
4117 if (hd_len) {
4118 is_first_elem = false;
4119
4120 buffer->element[element].addr = virt_to_phys(hdr);
4121 buffer->element[element].length = hd_len;
4122 buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
4123
4124 /* HW header is allocated from cache: */
4125 if ((void *)hdr != skb->data)
4126 buf->is_header[element] = 1;
4127 /* HW header was pushed and is contiguous with linear part: */
4128 else if (length > 0 && !PAGE_ALIGNED(data) &&
4129 (data == (char *)hdr + hd_len))
4130 buffer->element[element].eflags |=
4131 SBAL_EFLAGS_CONTIGUOUS;
4132
4133 element++;
4134 }
4135
4136 /* map linear part into buffer element(s) */
4137 while (length > 0) {
4138 elem_length = min_t(unsigned int, length,
4139 PAGE_SIZE - offset_in_page(data));
4140
4141 buffer->element[element].addr = virt_to_phys(data);
4142 buffer->element[element].length = elem_length;
4143 length -= elem_length;
4144 if (is_first_elem) {
4145 is_first_elem = false;
4146 if (length || skb_is_nonlinear(skb))
4147 /* skb needs additional elements */
4148 buffer->element[element].eflags =
4149 SBAL_EFLAGS_FIRST_FRAG;
4150 else
4151 buffer->element[element].eflags = 0;
4152 } else {
4153 buffer->element[element].eflags =
4154 SBAL_EFLAGS_MIDDLE_FRAG;
4155 }
4156
4157 data += elem_length;
4158 element++;
4159 }
4160
4161 /* map page frags into buffer element(s) */
4162 for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
4163 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
4164
4165 data = skb_frag_address(frag);
4166 length = skb_frag_size(frag);
4167 while (length > 0) {
4168 elem_length = min_t(unsigned int, length,
4169 PAGE_SIZE - offset_in_page(data));
4170
4171 buffer->element[element].addr = virt_to_phys(data);
4172 buffer->element[element].length = elem_length;
4173 buffer->element[element].eflags =
4174 SBAL_EFLAGS_MIDDLE_FRAG;
4175
4176 length -= elem_length;
4177 data += elem_length;
4178 element++;
4179 }
4180 }
4181
4182 if (buffer->element[element - 1].eflags)
4183 buffer->element[element - 1].eflags = SBAL_EFLAGS_LAST_FRAG;
4184 buf->next_element_to_fill = element;
4185 return element;
4186 }
4187
4188 static int __qeth_xmit(struct qeth_card *card, struct qeth_qdio_out_q *queue,
4189 struct sk_buff *skb, unsigned int elements,
4190 struct qeth_hdr *hdr, unsigned int offset,
4191 unsigned int hd_len)
4192 {
4193 unsigned int bytes = qdisc_pkt_len(skb);
4194 struct qeth_qdio_out_buffer *buffer;
4195 unsigned int next_element;
4196 struct netdev_queue *txq;
4197 bool stopped = false;
4198 bool flush;
4199
4200 buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start + queue->bulk_count)];
4201 txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
4202
4203 /* Just a sanity check, the wake/stop logic should ensure that we always
4204 * get a free buffer.
4205 */
4206 if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4207 return -EBUSY;
4208
4209 flush = !qeth_iqd_may_bulk(queue, skb, hdr);
4210
4211 if (flush ||
4212 (buffer->next_element_to_fill + elements > queue->max_elements)) {
4213 if (buffer->next_element_to_fill > 0) {
4214 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4215 queue->bulk_count++;
4216 }
4217
4218 if (queue->bulk_count >= queue->bulk_max)
4219 flush = true;
4220
4221 if (flush)
4222 qeth_flush_queue(queue);
4223
4224 buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start +
4225 queue->bulk_count)];
4226
4227 /* Sanity-check again: */
4228 if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4229 return -EBUSY;
4230 }
4231
4232 if (buffer->next_element_to_fill == 0 &&
4233 atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
4234 /* If a TX completion happens right _here_ and misses to wake
4235 * the txq, then our re-check below will catch the race.
4236 */
4237 QETH_TXQ_STAT_INC(queue, stopped);
4238 netif_tx_stop_queue(txq);
4239 stopped = true;
4240 }
4241
4242 next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
4243 buffer->bytes += bytes;
4244 buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
4245 queue->prev_hdr = hdr;
4246
4247 flush = __netdev_tx_sent_queue(txq, bytes,
4248 !stopped && netdev_xmit_more());
4249
4250 if (flush || next_element >= queue->max_elements) {
4251 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4252 queue->bulk_count++;
4253
4254 if (queue->bulk_count >= queue->bulk_max)
4255 flush = true;
4256
4257 if (flush)
4258 qeth_flush_queue(queue);
4259 }
4260
4261 if (stopped && !qeth_out_queue_is_full(queue))
4262 netif_tx_start_queue(txq);
4263 return 0;
4264 }
4265
4266 int qeth_do_send_packet(struct qeth_card *card, struct qeth_qdio_out_q *queue,
4267 struct sk_buff *skb, struct qeth_hdr *hdr,
4268 unsigned int offset, unsigned int hd_len,
4269 int elements_needed)
4270 {
4271 unsigned int start_index = queue->next_buf_to_fill;
4272 struct qeth_qdio_out_buffer *buffer;
4273 unsigned int next_element;
4274 struct netdev_queue *txq;
4275 bool stopped = false;
4276 int flush_count = 0;
4277 int do_pack = 0;
4278 int rc = 0;
4279
4280 buffer = queue->bufs[queue->next_buf_to_fill];
4281
4282 /* Just a sanity check, the wake/stop logic should ensure that we always
4283 * get a free buffer.
4284 */
4285 if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4286 return -EBUSY;
4287
4288 txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
4289
4290 /* check if we need to switch packing state of this queue */
4291 qeth_switch_to_packing_if_needed(queue);
4292 if (queue->do_pack) {
4293 do_pack = 1;
4294 /* does packet fit in current buffer? */
4295 if (buffer->next_element_to_fill + elements_needed >
4296 queue->max_elements) {
4297 /* ... no -> set state PRIMED */
4298 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4299 flush_count++;
4300 queue->next_buf_to_fill =
4301 QDIO_BUFNR(queue->next_buf_to_fill + 1);
4302 buffer = queue->bufs[queue->next_buf_to_fill];
4303
4304 /* We stepped forward, so sanity-check again: */
4305 if (atomic_read(&buffer->state) !=
4306 QETH_QDIO_BUF_EMPTY) {
4307 qeth_flush_buffers(queue, start_index,
4308 flush_count);
4309 rc = -EBUSY;
4310 goto out;
4311 }
4312 }
4313 }
4314
4315 if (buffer->next_element_to_fill == 0 &&
4316 atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
4317 /* If a TX completion happens right _here_ and misses to wake
4318 * the txq, then our re-check below will catch the race.
4319 */
4320 QETH_TXQ_STAT_INC(queue, stopped);
4321 netif_tx_stop_queue(txq);
4322 stopped = true;
4323 }
4324
4325 next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
4326 buffer->bytes += qdisc_pkt_len(skb);
4327 buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
4328
4329 if (queue->do_pack)
4330 QETH_TXQ_STAT_INC(queue, skbs_pack);
4331 if (!queue->do_pack || stopped || next_element >= queue->max_elements) {
4332 flush_count++;
4333 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4334 queue->next_buf_to_fill =
4335 QDIO_BUFNR(queue->next_buf_to_fill + 1);
4336 }
4337
4338 if (flush_count)
4339 qeth_flush_buffers(queue, start_index, flush_count);
4340
4341 out:
4342 if (do_pack)
4343 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_count);
4344
4345 if (stopped && !qeth_out_queue_is_full(queue))
4346 netif_tx_start_queue(txq);
4347 return rc;
4348 }
4349 EXPORT_SYMBOL_GPL(qeth_do_send_packet);
4350
4351 static void qeth_fill_tso_ext(struct qeth_hdr_tso *hdr,
4352 unsigned int payload_len, struct sk_buff *skb,
4353 unsigned int proto_len)
4354 {
4355 struct qeth_hdr_ext_tso *ext = &hdr->ext;
4356
4357 ext->hdr_tot_len = sizeof(*ext);
4358 ext->imb_hdr_no = 1;
4359 ext->hdr_type = 1;
4360 ext->hdr_version = 1;
4361 ext->hdr_len = 28;
4362 ext->payload_len = payload_len;
4363 ext->mss = skb_shinfo(skb)->gso_size;
4364 ext->dg_hdr_len = proto_len;
4365 }
4366
4367 int qeth_xmit(struct qeth_card *card, struct sk_buff *skb,
4368 struct qeth_qdio_out_q *queue, int ipv,
4369 void (*fill_header)(struct qeth_qdio_out_q *queue,
4370 struct qeth_hdr *hdr, struct sk_buff *skb,
4371 int ipv, unsigned int data_len))
4372 {
4373 unsigned int proto_len, hw_hdr_len;
4374 unsigned int frame_len = skb->len;
4375 bool is_tso = skb_is_gso(skb);
4376 unsigned int data_offset = 0;
4377 struct qeth_hdr *hdr = NULL;
4378 unsigned int hd_len = 0;
4379 unsigned int elements;
4380 int push_len, rc;
4381
4382 if (is_tso) {
4383 hw_hdr_len = sizeof(struct qeth_hdr_tso);
4384 proto_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
4385 } else {
4386 hw_hdr_len = sizeof(struct qeth_hdr);
4387 proto_len = (IS_IQD(card) && IS_LAYER2(card)) ? ETH_HLEN : 0;
4388 }
4389
4390 rc = skb_cow_head(skb, hw_hdr_len);
4391 if (rc)
4392 return rc;
4393
4394 push_len = qeth_add_hw_header(queue, skb, &hdr, hw_hdr_len, proto_len,
4395 &elements);
4396 if (push_len < 0)
4397 return push_len;
4398 if (is_tso || !push_len) {
4399 /* HW header needs its own buffer element. */
4400 hd_len = hw_hdr_len + proto_len;
4401 data_offset = push_len + proto_len;
4402 }
4403 memset(hdr, 0, hw_hdr_len);
4404 fill_header(queue, hdr, skb, ipv, frame_len);
4405 if (is_tso)
4406 qeth_fill_tso_ext((struct qeth_hdr_tso *) hdr,
4407 frame_len - proto_len, skb, proto_len);
4408
4409 if (IS_IQD(card)) {
4410 rc = __qeth_xmit(card, queue, skb, elements, hdr, data_offset,
4411 hd_len);
4412 } else {
4413 /* TODO: drop skb_orphan() once TX completion is fast enough */
4414 skb_orphan(skb);
4415 spin_lock(&queue->lock);
4416 rc = qeth_do_send_packet(card, queue, skb, hdr, data_offset,
4417 hd_len, elements);
4418 spin_unlock(&queue->lock);
4419 }
4420
4421 if (rc && !push_len)
4422 kmem_cache_free(qeth_core_header_cache, hdr);
4423
4424 return rc;
4425 }
4426 EXPORT_SYMBOL_GPL(qeth_xmit);
4427
4428 static int qeth_setadp_promisc_mode_cb(struct qeth_card *card,
4429 struct qeth_reply *reply, unsigned long data)
4430 {
4431 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4432 struct qeth_ipacmd_setadpparms *setparms;
4433
4434 QETH_CARD_TEXT(card, 4, "prmadpcb");
4435
4436 setparms = &(cmd->data.setadapterparms);
4437 if (qeth_setadpparms_inspect_rc(cmd)) {
4438 QETH_CARD_TEXT_(card, 4, "prmrc%x", cmd->hdr.return_code);
4439 setparms->data.mode = SET_PROMISC_MODE_OFF;
4440 }
4441 card->info.promisc_mode = setparms->data.mode;
4442 return (cmd->hdr.return_code) ? -EIO : 0;
4443 }
4444
4445 void qeth_setadp_promisc_mode(struct qeth_card *card, bool enable)
4446 {
4447 enum qeth_ipa_promisc_modes mode = enable ? SET_PROMISC_MODE_ON :
4448 SET_PROMISC_MODE_OFF;
4449 struct qeth_cmd_buffer *iob;
4450 struct qeth_ipa_cmd *cmd;
4451
4452 QETH_CARD_TEXT(card, 4, "setprom");
4453 QETH_CARD_TEXT_(card, 4, "mode:%x", mode);
4454
4455 iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE,
4456 SETADP_DATA_SIZEOF(mode));
4457 if (!iob)
4458 return;
4459 cmd = __ipa_cmd(iob);
4460 cmd->data.setadapterparms.data.mode = mode;
4461 qeth_send_ipa_cmd(card, iob, qeth_setadp_promisc_mode_cb, NULL);
4462 }
4463 EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode);
4464
4465 static int qeth_setadpparms_change_macaddr_cb(struct qeth_card *card,
4466 struct qeth_reply *reply, unsigned long data)
4467 {
4468 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4469 struct qeth_ipacmd_setadpparms *adp_cmd;
4470
4471 QETH_CARD_TEXT(card, 4, "chgmaccb");
4472 if (qeth_setadpparms_inspect_rc(cmd))
4473 return -EIO;
4474
4475 adp_cmd = &cmd->data.setadapterparms;
4476 if (!is_valid_ether_addr(adp_cmd->data.change_addr.addr))
4477 return -EADDRNOTAVAIL;
4478
4479 if (IS_LAYER2(card) && IS_OSD(card) && !IS_VM_NIC(card) &&
4480 !(adp_cmd->hdr.flags & QETH_SETADP_FLAGS_VIRTUAL_MAC))
4481 return -EADDRNOTAVAIL;
4482
4483 ether_addr_copy(card->dev->dev_addr, adp_cmd->data.change_addr.addr);
4484 return 0;
4485 }
4486
4487 int qeth_setadpparms_change_macaddr(struct qeth_card *card)
4488 {
4489 int rc;
4490 struct qeth_cmd_buffer *iob;
4491 struct qeth_ipa_cmd *cmd;
4492
4493 QETH_CARD_TEXT(card, 4, "chgmac");
4494
4495 iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS,
4496 SETADP_DATA_SIZEOF(change_addr));
4497 if (!iob)
4498 return -ENOMEM;
4499 cmd = __ipa_cmd(iob);
4500 cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC;
4501 cmd->data.setadapterparms.data.change_addr.addr_size = ETH_ALEN;
4502 ether_addr_copy(cmd->data.setadapterparms.data.change_addr.addr,
4503 card->dev->dev_addr);
4504 rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_change_macaddr_cb,
4505 NULL);
4506 return rc;
4507 }
4508 EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr);
4509
4510 static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card,
4511 struct qeth_reply *reply, unsigned long data)
4512 {
4513 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4514 struct qeth_set_access_ctrl *access_ctrl_req;
4515
4516 QETH_CARD_TEXT(card, 4, "setaccb");
4517
4518 access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4519 QETH_CARD_TEXT_(card, 2, "rc=%d",
4520 cmd->data.setadapterparms.hdr.return_code);
4521 if (cmd->data.setadapterparms.hdr.return_code !=
4522 SET_ACCESS_CTRL_RC_SUCCESS)
4523 QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%#x) on device %x: %#x\n",
4524 access_ctrl_req->subcmd_code, CARD_DEVID(card),
4525 cmd->data.setadapterparms.hdr.return_code);
4526 switch (qeth_setadpparms_inspect_rc(cmd)) {
4527 case SET_ACCESS_CTRL_RC_SUCCESS:
4528 if (access_ctrl_req->subcmd_code == ISOLATION_MODE_NONE)
4529 dev_info(&card->gdev->dev,
4530 "QDIO data connection isolation is deactivated\n");
4531 else
4532 dev_info(&card->gdev->dev,
4533 "QDIO data connection isolation is activated\n");
4534 return 0;
4535 case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
4536 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already deactivated\n",
4537 CARD_DEVID(card));
4538 return 0;
4539 case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
4540 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already activated\n",
4541 CARD_DEVID(card));
4542 return 0;
4543 case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
4544 dev_err(&card->gdev->dev, "Adapter does not "
4545 "support QDIO data connection isolation\n");
4546 return -EOPNOTSUPP;
4547 case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
4548 dev_err(&card->gdev->dev,
4549 "Adapter is dedicated. "
4550 "QDIO data connection isolation not supported\n");
4551 return -EOPNOTSUPP;
4552 case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
4553 dev_err(&card->gdev->dev,
4554 "TSO does not permit QDIO data connection isolation\n");
4555 return -EPERM;
4556 case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED:
4557 dev_err(&card->gdev->dev, "The adjacent switch port does not "
4558 "support reflective relay mode\n");
4559 return -EOPNOTSUPP;
4560 case SET_ACCESS_CTRL_RC_REFLREL_FAILED:
4561 dev_err(&card->gdev->dev, "The reflective relay mode cannot be "
4562 "enabled at the adjacent switch port");
4563 return -EREMOTEIO;
4564 case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED:
4565 dev_warn(&card->gdev->dev, "Turning off reflective relay mode "
4566 "at the adjacent switch failed\n");
4567 /* benign error while disabling ISOLATION_MODE_FWD */
4568 return 0;
4569 default:
4570 return -EIO;
4571 }
4572 }
4573
4574 int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
4575 enum qeth_ipa_isolation_modes mode)
4576 {
4577 int rc;
4578 struct qeth_cmd_buffer *iob;
4579 struct qeth_ipa_cmd *cmd;
4580 struct qeth_set_access_ctrl *access_ctrl_req;
4581
4582 QETH_CARD_TEXT(card, 4, "setacctl");
4583
4584 if (!qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
4585 dev_err(&card->gdev->dev,
4586 "Adapter does not support QDIO data connection isolation\n");
4587 return -EOPNOTSUPP;
4588 }
4589
4590 iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
4591 SETADP_DATA_SIZEOF(set_access_ctrl));
4592 if (!iob)
4593 return -ENOMEM;
4594 cmd = __ipa_cmd(iob);
4595 access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4596 access_ctrl_req->subcmd_code = mode;
4597
4598 rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb,
4599 NULL);
4600 if (rc) {
4601 QETH_CARD_TEXT_(card, 2, "rc=%d", rc);
4602 QETH_DBF_MESSAGE(3, "IPA(SET_ACCESS_CTRL(%d) on device %x: sent failed\n",
4603 rc, CARD_DEVID(card));
4604 }
4605
4606 return rc;
4607 }
4608
4609 void qeth_tx_timeout(struct net_device *dev, unsigned int txqueue)
4610 {
4611 struct qeth_card *card;
4612
4613 card = dev->ml_priv;
4614 QETH_CARD_TEXT(card, 4, "txtimeo");
4615 qeth_schedule_recovery(card);
4616 }
4617 EXPORT_SYMBOL_GPL(qeth_tx_timeout);
4618
4619 static int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum)
4620 {
4621 struct qeth_card *card = dev->ml_priv;
4622 int rc = 0;
4623
4624 switch (regnum) {
4625 case MII_BMCR: /* Basic mode control register */
4626 rc = BMCR_FULLDPLX;
4627 if ((card->info.link_type != QETH_LINK_TYPE_GBIT_ETH) &&
4628 (card->info.link_type != QETH_LINK_TYPE_OSN) &&
4629 (card->info.link_type != QETH_LINK_TYPE_10GBIT_ETH) &&
4630 (card->info.link_type != QETH_LINK_TYPE_25GBIT_ETH))
4631 rc |= BMCR_SPEED100;
4632 break;
4633 case MII_BMSR: /* Basic mode status register */
4634 rc = BMSR_ERCAP | BMSR_ANEGCOMPLETE | BMSR_LSTATUS |
4635 BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL |
4636 BMSR_100BASE4;
4637 break;
4638 case MII_PHYSID1: /* PHYS ID 1 */
4639 rc = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 8) |
4640 dev->dev_addr[2];
4641 rc = (rc >> 5) & 0xFFFF;
4642 break;
4643 case MII_PHYSID2: /* PHYS ID 2 */
4644 rc = (dev->dev_addr[2] << 10) & 0xFFFF;
4645 break;
4646 case MII_ADVERTISE: /* Advertisement control reg */
4647 rc = ADVERTISE_ALL;
4648 break;
4649 case MII_LPA: /* Link partner ability reg */
4650 rc = LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL |
4651 LPA_100BASE4 | LPA_LPACK;
4652 break;
4653 case MII_EXPANSION: /* Expansion register */
4654 break;
4655 case MII_DCOUNTER: /* disconnect counter */
4656 break;
4657 case MII_FCSCOUNTER: /* false carrier counter */
4658 break;
4659 case MII_NWAYTEST: /* N-way auto-neg test register */
4660 break;
4661 case MII_RERRCOUNTER: /* rx error counter */
4662 rc = card->stats.rx_length_errors +
4663 card->stats.rx_frame_errors +
4664 card->stats.rx_fifo_errors;
4665 break;
4666 case MII_SREVISION: /* silicon revision */
4667 break;
4668 case MII_RESV1: /* reserved 1 */
4669 break;
4670 case MII_LBRERROR: /* loopback, rx, bypass error */
4671 break;
4672 case MII_PHYADDR: /* physical address */
4673 break;
4674 case MII_RESV2: /* reserved 2 */
4675 break;
4676 case MII_TPISTATUS: /* TPI status for 10mbps */
4677 break;
4678 case MII_NCONFIG: /* network interface config */
4679 break;
4680 default:
4681 break;
4682 }
4683 return rc;
4684 }
4685
4686 static int qeth_snmp_command_cb(struct qeth_card *card,
4687 struct qeth_reply *reply, unsigned long data)
4688 {
4689 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4690 struct qeth_arp_query_info *qinfo = reply->param;
4691 struct qeth_ipacmd_setadpparms *adp_cmd;
4692 unsigned int data_len;
4693 void *snmp_data;
4694
4695 QETH_CARD_TEXT(card, 3, "snpcmdcb");
4696
4697 if (cmd->hdr.return_code) {
4698 QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code);
4699 return -EIO;
4700 }
4701 if (cmd->data.setadapterparms.hdr.return_code) {
4702 cmd->hdr.return_code =
4703 cmd->data.setadapterparms.hdr.return_code;
4704 QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code);
4705 return -EIO;
4706 }
4707
4708 adp_cmd = &cmd->data.setadapterparms;
4709 data_len = adp_cmd->hdr.cmdlength - sizeof(adp_cmd->hdr);
4710 if (adp_cmd->hdr.seq_no == 1) {
4711 snmp_data = &adp_cmd->data.snmp;
4712 } else {
4713 snmp_data = &adp_cmd->data.snmp.request;
4714 data_len -= offsetof(struct qeth_snmp_cmd, request);
4715 }
4716
4717 /* check if there is enough room in userspace */
4718 if ((qinfo->udata_len - qinfo->udata_offset) < data_len) {
4719 QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOSPC);
4720 return -ENOSPC;
4721 }
4722 QETH_CARD_TEXT_(card, 4, "snore%i",
4723 cmd->data.setadapterparms.hdr.used_total);
4724 QETH_CARD_TEXT_(card, 4, "sseqn%i",
4725 cmd->data.setadapterparms.hdr.seq_no);
4726 /*copy entries to user buffer*/
4727 memcpy(qinfo->udata + qinfo->udata_offset, snmp_data, data_len);
4728 qinfo->udata_offset += data_len;
4729
4730 if (cmd->data.setadapterparms.hdr.seq_no <
4731 cmd->data.setadapterparms.hdr.used_total)
4732 return 1;
4733 return 0;
4734 }
4735
4736 static int qeth_snmp_command(struct qeth_card *card, char __user *udata)
4737 {
4738 struct qeth_snmp_ureq __user *ureq;
4739 struct qeth_cmd_buffer *iob;
4740 unsigned int req_len;
4741 struct qeth_arp_query_info qinfo = {0, };
4742 int rc = 0;
4743
4744 QETH_CARD_TEXT(card, 3, "snmpcmd");
4745
4746 if (IS_VM_NIC(card))
4747 return -EOPNOTSUPP;
4748
4749 if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) &&
4750 IS_LAYER3(card))
4751 return -EOPNOTSUPP;
4752
4753 ureq = (struct qeth_snmp_ureq __user *) udata;
4754 if (get_user(qinfo.udata_len, &ureq->hdr.data_len) ||
4755 get_user(req_len, &ureq->hdr.req_len))
4756 return -EFAULT;
4757
4758 /* Sanitize user input, to avoid overflows in iob size calculation: */
4759 if (req_len > QETH_BUFSIZE)
4760 return -EINVAL;
4761
4762 iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL, req_len);
4763 if (!iob)
4764 return -ENOMEM;
4765
4766 if (copy_from_user(&__ipa_cmd(iob)->data.setadapterparms.data.snmp,
4767 &ureq->cmd, req_len)) {
4768 qeth_put_cmd(iob);
4769 return -EFAULT;
4770 }
4771
4772 qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
4773 if (!qinfo.udata) {
4774 qeth_put_cmd(iob);
4775 return -ENOMEM;
4776 }
4777 qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr);
4778
4779 rc = qeth_send_ipa_cmd(card, iob, qeth_snmp_command_cb, &qinfo);
4780 if (rc)
4781 QETH_DBF_MESSAGE(2, "SNMP command failed on device %x: (%#x)\n",
4782 CARD_DEVID(card), rc);
4783 else {
4784 if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
4785 rc = -EFAULT;
4786 }
4787
4788 kfree(qinfo.udata);
4789 return rc;
4790 }
4791
4792 static int qeth_setadpparms_query_oat_cb(struct qeth_card *card,
4793 struct qeth_reply *reply,
4794 unsigned long data)
4795 {
4796 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4797 struct qeth_qoat_priv *priv = reply->param;
4798 int resdatalen;
4799
4800 QETH_CARD_TEXT(card, 3, "qoatcb");
4801 if (qeth_setadpparms_inspect_rc(cmd))
4802 return -EIO;
4803
4804 resdatalen = cmd->data.setadapterparms.hdr.cmdlength;
4805
4806 if (resdatalen > (priv->buffer_len - priv->response_len))
4807 return -ENOSPC;
4808
4809 memcpy(priv->buffer + priv->response_len,
4810 &cmd->data.setadapterparms.hdr, resdatalen);
4811 priv->response_len += resdatalen;
4812
4813 if (cmd->data.setadapterparms.hdr.seq_no <
4814 cmd->data.setadapterparms.hdr.used_total)
4815 return 1;
4816 return 0;
4817 }
4818
4819 static int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
4820 {
4821 int rc = 0;
4822 struct qeth_cmd_buffer *iob;
4823 struct qeth_ipa_cmd *cmd;
4824 struct qeth_query_oat *oat_req;
4825 struct qeth_query_oat_data oat_data;
4826 struct qeth_qoat_priv priv;
4827 void __user *tmp;
4828
4829 QETH_CARD_TEXT(card, 3, "qoatcmd");
4830
4831 if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT))
4832 return -EOPNOTSUPP;
4833
4834 if (copy_from_user(&oat_data, udata, sizeof(oat_data)))
4835 return -EFAULT;
4836
4837 priv.buffer_len = oat_data.buffer_len;
4838 priv.response_len = 0;
4839 priv.buffer = vzalloc(oat_data.buffer_len);
4840 if (!priv.buffer)
4841 return -ENOMEM;
4842
4843 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4844 SETADP_DATA_SIZEOF(query_oat));
4845 if (!iob) {
4846 rc = -ENOMEM;
4847 goto out_free;
4848 }
4849 cmd = __ipa_cmd(iob);
4850 oat_req = &cmd->data.setadapterparms.data.query_oat;
4851 oat_req->subcmd_code = oat_data.command;
4852
4853 rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb, &priv);
4854 if (!rc) {
4855 tmp = is_compat_task() ? compat_ptr(oat_data.ptr) :
4856 u64_to_user_ptr(oat_data.ptr);
4857 oat_data.response_len = priv.response_len;
4858
4859 if (copy_to_user(tmp, priv.buffer, priv.response_len) ||
4860 copy_to_user(udata, &oat_data, sizeof(oat_data)))
4861 rc = -EFAULT;
4862 }
4863
4864 out_free:
4865 vfree(priv.buffer);
4866 return rc;
4867 }
4868
4869 static int qeth_query_card_info_cb(struct qeth_card *card,
4870 struct qeth_reply *reply, unsigned long data)
4871 {
4872 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4873 struct qeth_link_info *link_info = reply->param;
4874 struct qeth_query_card_info *card_info;
4875
4876 QETH_CARD_TEXT(card, 2, "qcrdincb");
4877 if (qeth_setadpparms_inspect_rc(cmd))
4878 return -EIO;
4879
4880 card_info = &cmd->data.setadapterparms.data.card_info;
4881 netdev_dbg(card->dev,
4882 "card info: card_type=0x%02x, port_mode=0x%04x, port_speed=0x%08x\n",
4883 card_info->card_type, card_info->port_mode,
4884 card_info->port_speed);
4885
4886 switch (card_info->port_mode) {
4887 case CARD_INFO_PORTM_FULLDUPLEX:
4888 link_info->duplex = DUPLEX_FULL;
4889 break;
4890 case CARD_INFO_PORTM_HALFDUPLEX:
4891 link_info->duplex = DUPLEX_HALF;
4892 break;
4893 default:
4894 link_info->duplex = DUPLEX_UNKNOWN;
4895 }
4896
4897 switch (card_info->card_type) {
4898 case CARD_INFO_TYPE_1G_COPPER_A:
4899 case CARD_INFO_TYPE_1G_COPPER_B:
4900 link_info->speed = SPEED_1000;
4901 link_info->port = PORT_TP;
4902 break;
4903 case CARD_INFO_TYPE_1G_FIBRE_A:
4904 case CARD_INFO_TYPE_1G_FIBRE_B:
4905 link_info->speed = SPEED_1000;
4906 link_info->port = PORT_FIBRE;
4907 break;
4908 case CARD_INFO_TYPE_10G_FIBRE_A:
4909 case CARD_INFO_TYPE_10G_FIBRE_B:
4910 link_info->speed = SPEED_10000;
4911 link_info->port = PORT_FIBRE;
4912 break;
4913 default:
4914 switch (card_info->port_speed) {
4915 case CARD_INFO_PORTS_10M:
4916 link_info->speed = SPEED_10;
4917 break;
4918 case CARD_INFO_PORTS_100M:
4919 link_info->speed = SPEED_100;
4920 break;
4921 case CARD_INFO_PORTS_1G:
4922 link_info->speed = SPEED_1000;
4923 break;
4924 case CARD_INFO_PORTS_10G:
4925 link_info->speed = SPEED_10000;
4926 break;
4927 case CARD_INFO_PORTS_25G:
4928 link_info->speed = SPEED_25000;
4929 break;
4930 default:
4931 link_info->speed = SPEED_UNKNOWN;
4932 }
4933
4934 link_info->port = PORT_OTHER;
4935 }
4936
4937 return 0;
4938 }
4939
4940 int qeth_query_card_info(struct qeth_card *card,
4941 struct qeth_link_info *link_info)
4942 {
4943 struct qeth_cmd_buffer *iob;
4944
4945 QETH_CARD_TEXT(card, 2, "qcrdinfo");
4946 if (!qeth_adp_supported(card, IPA_SETADP_QUERY_CARD_INFO))
4947 return -EOPNOTSUPP;
4948 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_CARD_INFO, 0);
4949 if (!iob)
4950 return -ENOMEM;
4951
4952 return qeth_send_ipa_cmd(card, iob, qeth_query_card_info_cb, link_info);
4953 }
4954
4955 static int qeth_init_link_info_oat_cb(struct qeth_card *card,
4956 struct qeth_reply *reply_priv,
4957 unsigned long data)
4958 {
4959 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4960 struct qeth_link_info *link_info = reply_priv->param;
4961 struct qeth_query_oat_physical_if *phys_if;
4962 struct qeth_query_oat_reply *reply;
4963
4964 if (qeth_setadpparms_inspect_rc(cmd))
4965 return -EIO;
4966
4967 /* Multi-part reply is unexpected, don't bother: */
4968 if (cmd->data.setadapterparms.hdr.used_total > 1)
4969 return -EINVAL;
4970
4971 /* Expect the reply to start with phys_if data: */
4972 reply = &cmd->data.setadapterparms.data.query_oat.reply[0];
4973 if (reply->type != QETH_QOAT_REPLY_TYPE_PHYS_IF ||
4974 reply->length < sizeof(*reply))
4975 return -EINVAL;
4976
4977 phys_if = &reply->phys_if;
4978
4979 switch (phys_if->speed_duplex) {
4980 case QETH_QOAT_PHYS_SPEED_10M_HALF:
4981 link_info->speed = SPEED_10;
4982 link_info->duplex = DUPLEX_HALF;
4983 break;
4984 case QETH_QOAT_PHYS_SPEED_10M_FULL:
4985 link_info->speed = SPEED_10;
4986 link_info->duplex = DUPLEX_FULL;
4987 break;
4988 case QETH_QOAT_PHYS_SPEED_100M_HALF:
4989 link_info->speed = SPEED_100;
4990 link_info->duplex = DUPLEX_HALF;
4991 break;
4992 case QETH_QOAT_PHYS_SPEED_100M_FULL:
4993 link_info->speed = SPEED_100;
4994 link_info->duplex = DUPLEX_FULL;
4995 break;
4996 case QETH_QOAT_PHYS_SPEED_1000M_HALF:
4997 link_info->speed = SPEED_1000;
4998 link_info->duplex = DUPLEX_HALF;
4999 break;
5000 case QETH_QOAT_PHYS_SPEED_1000M_FULL:
5001 link_info->speed = SPEED_1000;
5002 link_info->duplex = DUPLEX_FULL;
5003 break;
5004 case QETH_QOAT_PHYS_SPEED_10G_FULL:
5005 link_info->speed = SPEED_10000;
5006 link_info->duplex = DUPLEX_FULL;
5007 break;
5008 case QETH_QOAT_PHYS_SPEED_25G_FULL:
5009 link_info->speed = SPEED_25000;
5010 link_info->duplex = DUPLEX_FULL;
5011 break;
5012 case QETH_QOAT_PHYS_SPEED_UNKNOWN:
5013 default:
5014 link_info->speed = SPEED_UNKNOWN;
5015 link_info->duplex = DUPLEX_UNKNOWN;
5016 break;
5017 }
5018
5019 switch (phys_if->media_type) {
5020 case QETH_QOAT_PHYS_MEDIA_COPPER:
5021 link_info->port = PORT_TP;
5022 link_info->link_mode = QETH_LINK_MODE_UNKNOWN;
5023 break;
5024 case QETH_QOAT_PHYS_MEDIA_FIBRE_SHORT:
5025 link_info->port = PORT_FIBRE;
5026 link_info->link_mode = QETH_LINK_MODE_FIBRE_SHORT;
5027 break;
5028 case QETH_QOAT_PHYS_MEDIA_FIBRE_LONG:
5029 link_info->port = PORT_FIBRE;
5030 link_info->link_mode = QETH_LINK_MODE_FIBRE_LONG;
5031 break;
5032 default:
5033 link_info->port = PORT_OTHER;
5034 link_info->link_mode = QETH_LINK_MODE_UNKNOWN;
5035 break;
5036 }
5037
5038 return 0;
5039 }
5040
5041 static void qeth_init_link_info(struct qeth_card *card)
5042 {
5043 card->info.link_info.duplex = DUPLEX_FULL;
5044
5045 if (IS_IQD(card) || IS_VM_NIC(card)) {
5046 card->info.link_info.speed = SPEED_10000;
5047 card->info.link_info.port = PORT_FIBRE;
5048 card->info.link_info.link_mode = QETH_LINK_MODE_FIBRE_SHORT;
5049 } else {
5050 switch (card->info.link_type) {
5051 case QETH_LINK_TYPE_FAST_ETH:
5052 case QETH_LINK_TYPE_LANE_ETH100:
5053 card->info.link_info.speed = SPEED_100;
5054 card->info.link_info.port = PORT_TP;
5055 break;
5056 case QETH_LINK_TYPE_GBIT_ETH:
5057 case QETH_LINK_TYPE_LANE_ETH1000:
5058 card->info.link_info.speed = SPEED_1000;
5059 card->info.link_info.port = PORT_FIBRE;
5060 break;
5061 case QETH_LINK_TYPE_10GBIT_ETH:
5062 card->info.link_info.speed = SPEED_10000;
5063 card->info.link_info.port = PORT_FIBRE;
5064 break;
5065 case QETH_LINK_TYPE_25GBIT_ETH:
5066 card->info.link_info.speed = SPEED_25000;
5067 card->info.link_info.port = PORT_FIBRE;
5068 break;
5069 default:
5070 dev_info(&card->gdev->dev, "Unknown link type %x\n",
5071 card->info.link_type);
5072 card->info.link_info.speed = SPEED_UNKNOWN;
5073 card->info.link_info.port = PORT_OTHER;
5074 }
5075
5076 card->info.link_info.link_mode = QETH_LINK_MODE_UNKNOWN;
5077 }
5078
5079 /* Get more accurate data via QUERY OAT: */
5080 if (qeth_adp_supported(card, IPA_SETADP_QUERY_OAT)) {
5081 struct qeth_link_info link_info;
5082 struct qeth_cmd_buffer *iob;
5083
5084 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
5085 SETADP_DATA_SIZEOF(query_oat));
5086 if (iob) {
5087 struct qeth_ipa_cmd *cmd = __ipa_cmd(iob);
5088 struct qeth_query_oat *oat_req;
5089
5090 oat_req = &cmd->data.setadapterparms.data.query_oat;
5091 oat_req->subcmd_code = QETH_QOAT_SCOPE_INTERFACE;
5092
5093 if (!qeth_send_ipa_cmd(card, iob,
5094 qeth_init_link_info_oat_cb,
5095 &link_info)) {
5096 if (link_info.speed != SPEED_UNKNOWN)
5097 card->info.link_info.speed = link_info.speed;
5098 if (link_info.duplex != DUPLEX_UNKNOWN)
5099 card->info.link_info.duplex = link_info.duplex;
5100 if (link_info.port != PORT_OTHER)
5101 card->info.link_info.port = link_info.port;
5102 if (link_info.link_mode != QETH_LINK_MODE_UNKNOWN)
5103 card->info.link_info.link_mode = link_info.link_mode;
5104 }
5105 }
5106 }
5107 }
5108
5109 /**
5110 * qeth_vm_request_mac() - Request a hypervisor-managed MAC address
5111 * @card: pointer to a qeth_card
5112 *
5113 * Returns
5114 * 0, if a MAC address has been set for the card's netdevice
5115 * a return code, for various error conditions
5116 */
5117 int qeth_vm_request_mac(struct qeth_card *card)
5118 {
5119 struct diag26c_mac_resp *response;
5120 struct diag26c_mac_req *request;
5121 int rc;
5122
5123 QETH_CARD_TEXT(card, 2, "vmreqmac");
5124
5125 request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
5126 response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
5127 if (!request || !response) {
5128 rc = -ENOMEM;
5129 goto out;
5130 }
5131
5132 request->resp_buf_len = sizeof(*response);
5133 request->resp_version = DIAG26C_VERSION2;
5134 request->op_code = DIAG26C_GET_MAC;
5135 request->devno = card->info.ddev_devno;
5136
5137 QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
5138 rc = diag26c(request, response, DIAG26C_MAC_SERVICES);
5139 QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
5140 if (rc)
5141 goto out;
5142 QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
5143
5144 if (request->resp_buf_len < sizeof(*response) ||
5145 response->version != request->resp_version) {
5146 rc = -EIO;
5147 QETH_CARD_TEXT(card, 2, "badresp");
5148 QETH_CARD_HEX(card, 2, &request->resp_buf_len,
5149 sizeof(request->resp_buf_len));
5150 } else if (!is_valid_ether_addr(response->mac)) {
5151 rc = -EINVAL;
5152 QETH_CARD_TEXT(card, 2, "badmac");
5153 QETH_CARD_HEX(card, 2, response->mac, ETH_ALEN);
5154 } else {
5155 ether_addr_copy(card->dev->dev_addr, response->mac);
5156 }
5157
5158 out:
5159 kfree(response);
5160 kfree(request);
5161 return rc;
5162 }
5163 EXPORT_SYMBOL_GPL(qeth_vm_request_mac);
5164
5165 static void qeth_determine_capabilities(struct qeth_card *card)
5166 {
5167 struct qeth_channel *channel = &card->data;
5168 struct ccw_device *ddev = channel->ccwdev;
5169 int rc;
5170 int ddev_offline = 0;
5171
5172 QETH_CARD_TEXT(card, 2, "detcapab");
5173 if (!ddev->online) {
5174 ddev_offline = 1;
5175 rc = qeth_start_channel(channel);
5176 if (rc) {
5177 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
5178 goto out;
5179 }
5180 }
5181
5182 rc = qeth_read_conf_data(card);
5183 if (rc) {
5184 QETH_DBF_MESSAGE(2, "qeth_read_conf_data on device %x returned %i\n",
5185 CARD_DEVID(card), rc);
5186 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
5187 goto out_offline;
5188 }
5189
5190 rc = qdio_get_ssqd_desc(ddev, &card->ssqd);
5191 if (rc)
5192 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
5193
5194 QETH_CARD_TEXT_(card, 2, "qfmt%d", card->ssqd.qfmt);
5195 QETH_CARD_TEXT_(card, 2, "ac1:%02x", card->ssqd.qdioac1);
5196 QETH_CARD_TEXT_(card, 2, "ac2:%04x", card->ssqd.qdioac2);
5197 QETH_CARD_TEXT_(card, 2, "ac3:%04x", card->ssqd.qdioac3);
5198 QETH_CARD_TEXT_(card, 2, "icnt%d", card->ssqd.icnt);
5199 if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) ||
5200 ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) ||
5201 ((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) {
5202 dev_info(&card->gdev->dev,
5203 "Completion Queueing supported\n");
5204 } else {
5205 card->options.cq = QETH_CQ_NOTAVAILABLE;
5206 }
5207
5208 out_offline:
5209 if (ddev_offline == 1)
5210 qeth_stop_channel(channel);
5211 out:
5212 return;
5213 }
5214
5215 static void qeth_read_ccw_conf_data(struct qeth_card *card)
5216 {
5217 struct qeth_card_info *info = &card->info;
5218 struct ccw_device *cdev = CARD_DDEV(card);
5219 struct ccw_dev_id dev_id;
5220
5221 QETH_CARD_TEXT(card, 2, "ccwconfd");
5222 ccw_device_get_id(cdev, &dev_id);
5223
5224 info->ddev_devno = dev_id.devno;
5225 info->ids_valid = !ccw_device_get_cssid(cdev, &info->cssid) &&
5226 !ccw_device_get_iid(cdev, &info->iid) &&
5227 !ccw_device_get_chid(cdev, 0, &info->chid);
5228 info->ssid = dev_id.ssid;
5229
5230 dev_info(&card->gdev->dev, "CHID: %x CHPID: %x\n",
5231 info->chid, info->chpid);
5232
5233 QETH_CARD_TEXT_(card, 3, "devn%x", info->ddev_devno);
5234 QETH_CARD_TEXT_(card, 3, "cssid:%x", info->cssid);
5235 QETH_CARD_TEXT_(card, 3, "iid:%x", info->iid);
5236 QETH_CARD_TEXT_(card, 3, "ssid:%x", info->ssid);
5237 QETH_CARD_TEXT_(card, 3, "chpid:%x", info->chpid);
5238 QETH_CARD_TEXT_(card, 3, "chid:%x", info->chid);
5239 QETH_CARD_TEXT_(card, 3, "idval%x", info->ids_valid);
5240 }
5241
5242 static int qeth_qdio_establish(struct qeth_card *card)
5243 {
5244 struct qdio_buffer **out_sbal_ptrs[QETH_MAX_OUT_QUEUES];
5245 struct qdio_buffer **in_sbal_ptrs[QETH_MAX_IN_QUEUES];
5246 struct qeth_qib_parms *qib_parms = NULL;
5247 struct qdio_initialize init_data;
5248 unsigned int i;
5249 int rc = 0;
5250
5251 QETH_CARD_TEXT(card, 2, "qdioest");
5252
5253 if (!IS_IQD(card) && !IS_VM_NIC(card)) {
5254 qib_parms = kzalloc(sizeof_field(struct qib, parm), GFP_KERNEL);
5255 if (!qib_parms)
5256 return -ENOMEM;
5257
5258 qeth_fill_qib_parms(card, qib_parms);
5259 }
5260
5261 in_sbal_ptrs[0] = card->qdio.in_q->qdio_bufs;
5262 if (card->options.cq == QETH_CQ_ENABLED)
5263 in_sbal_ptrs[1] = card->qdio.c_q->qdio_bufs;
5264
5265 for (i = 0; i < card->qdio.no_out_queues; i++)
5266 out_sbal_ptrs[i] = card->qdio.out_qs[i]->qdio_bufs;
5267
5268 memset(&init_data, 0, sizeof(struct qdio_initialize));
5269 init_data.q_format = IS_IQD(card) ? QDIO_IQDIO_QFMT :
5270 QDIO_QETH_QFMT;
5271 init_data.qib_param_field_format = 0;
5272 init_data.qib_param_field = (void *)qib_parms;
5273 init_data.no_input_qs = card->qdio.no_in_queues;
5274 init_data.no_output_qs = card->qdio.no_out_queues;
5275 init_data.input_handler = qeth_qdio_input_handler;
5276 init_data.output_handler = qeth_qdio_output_handler;
5277 init_data.irq_poll = qeth_qdio_poll;
5278 init_data.int_parm = (unsigned long) card;
5279 init_data.input_sbal_addr_array = in_sbal_ptrs;
5280 init_data.output_sbal_addr_array = out_sbal_ptrs;
5281 init_data.output_sbal_state_array = card->qdio.out_bufstates;
5282 init_data.scan_threshold = IS_IQD(card) ? 0 : 32;
5283
5284 if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED,
5285 QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) {
5286 rc = qdio_allocate(CARD_DDEV(card), init_data.no_input_qs,
5287 init_data.no_output_qs);
5288 if (rc) {
5289 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5290 goto out;
5291 }
5292 rc = qdio_establish(CARD_DDEV(card), &init_data);
5293 if (rc) {
5294 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5295 qdio_free(CARD_DDEV(card));
5296 }
5297 }
5298
5299 switch (card->options.cq) {
5300 case QETH_CQ_ENABLED:
5301 dev_info(&card->gdev->dev, "Completion Queue support enabled");
5302 break;
5303 case QETH_CQ_DISABLED:
5304 dev_info(&card->gdev->dev, "Completion Queue support disabled");
5305 break;
5306 default:
5307 break;
5308 }
5309
5310 out:
5311 kfree(qib_parms);
5312 return rc;
5313 }
5314
5315 static void qeth_core_free_card(struct qeth_card *card)
5316 {
5317 QETH_CARD_TEXT(card, 2, "freecrd");
5318
5319 unregister_service_level(&card->qeth_service_level);
5320 debugfs_remove_recursive(card->debugfs);
5321 qeth_put_cmd(card->read_cmd);
5322 destroy_workqueue(card->event_wq);
5323 dev_set_drvdata(&card->gdev->dev, NULL);
5324 kfree(card);
5325 }
5326
5327 static void qeth_trace_features(struct qeth_card *card)
5328 {
5329 QETH_CARD_TEXT(card, 2, "features");
5330 QETH_CARD_HEX(card, 2, &card->options.ipa4, sizeof(card->options.ipa4));
5331 QETH_CARD_HEX(card, 2, &card->options.ipa6, sizeof(card->options.ipa6));
5332 QETH_CARD_HEX(card, 2, &card->options.adp, sizeof(card->options.adp));
5333 QETH_CARD_HEX(card, 2, &card->info.diagass_support,
5334 sizeof(card->info.diagass_support));
5335 }
5336
5337 static struct ccw_device_id qeth_ids[] = {
5338 {CCW_DEVICE_DEVTYPE(0x1731, 0x01, 0x1732, 0x01),
5339 .driver_info = QETH_CARD_TYPE_OSD},
5340 {CCW_DEVICE_DEVTYPE(0x1731, 0x05, 0x1732, 0x05),
5341 .driver_info = QETH_CARD_TYPE_IQD},
5342 #ifdef CONFIG_QETH_OSN
5343 {CCW_DEVICE_DEVTYPE(0x1731, 0x06, 0x1732, 0x06),
5344 .driver_info = QETH_CARD_TYPE_OSN},
5345 #endif
5346 {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x03),
5347 .driver_info = QETH_CARD_TYPE_OSM},
5348 #ifdef CONFIG_QETH_OSX
5349 {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02),
5350 .driver_info = QETH_CARD_TYPE_OSX},
5351 #endif
5352 {},
5353 };
5354 MODULE_DEVICE_TABLE(ccw, qeth_ids);
5355
5356 static struct ccw_driver qeth_ccw_driver = {
5357 .driver = {
5358 .owner = THIS_MODULE,
5359 .name = "qeth",
5360 },
5361 .ids = qeth_ids,
5362 .probe = ccwgroup_probe_ccwdev,
5363 .remove = ccwgroup_remove_ccwdev,
5364 };
5365
5366 static int qeth_hardsetup_card(struct qeth_card *card, bool *carrier_ok)
5367 {
5368 int retries = 3;
5369 int rc;
5370
5371 QETH_CARD_TEXT(card, 2, "hrdsetup");
5372 atomic_set(&card->force_alloc_skb, 0);
5373 rc = qeth_update_from_chp_desc(card);
5374 if (rc)
5375 return rc;
5376 retry:
5377 if (retries < 3)
5378 QETH_DBF_MESSAGE(2, "Retrying to do IDX activates on device %x.\n",
5379 CARD_DEVID(card));
5380 rc = qeth_qdio_clear_card(card, !IS_IQD(card));
5381 qeth_stop_channel(&card->data);
5382 qeth_stop_channel(&card->write);
5383 qeth_stop_channel(&card->read);
5384 qdio_free(CARD_DDEV(card));
5385
5386 rc = qeth_start_channel(&card->read);
5387 if (rc)
5388 goto retriable;
5389 rc = qeth_start_channel(&card->write);
5390 if (rc)
5391 goto retriable;
5392 rc = qeth_start_channel(&card->data);
5393 if (rc)
5394 goto retriable;
5395 retriable:
5396 if (rc == -ERESTARTSYS) {
5397 QETH_CARD_TEXT(card, 2, "break1");
5398 return rc;
5399 } else if (rc) {
5400 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
5401 if (--retries < 0)
5402 goto out;
5403 else
5404 goto retry;
5405 }
5406
5407 qeth_determine_capabilities(card);
5408 qeth_read_ccw_conf_data(card);
5409 qeth_idx_init(card);
5410
5411 rc = qeth_idx_activate_read_channel(card);
5412 if (rc == -EINTR) {
5413 QETH_CARD_TEXT(card, 2, "break2");
5414 return rc;
5415 } else if (rc) {
5416 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
5417 if (--retries < 0)
5418 goto out;
5419 else
5420 goto retry;
5421 }
5422
5423 rc = qeth_idx_activate_write_channel(card);
5424 if (rc == -EINTR) {
5425 QETH_CARD_TEXT(card, 2, "break3");
5426 return rc;
5427 } else if (rc) {
5428 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
5429 if (--retries < 0)
5430 goto out;
5431 else
5432 goto retry;
5433 }
5434 card->read_or_write_problem = 0;
5435 rc = qeth_mpc_initialize(card);
5436 if (rc) {
5437 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
5438 goto out;
5439 }
5440
5441 rc = qeth_send_startlan(card);
5442 if (rc) {
5443 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
5444 if (rc == -ENETDOWN) {
5445 dev_warn(&card->gdev->dev, "The LAN is offline\n");
5446 *carrier_ok = false;
5447 } else {
5448 goto out;
5449 }
5450 } else {
5451 *carrier_ok = true;
5452 }
5453
5454 card->options.ipa4.supported = 0;
5455 card->options.ipa6.supported = 0;
5456 card->options.adp.supported = 0;
5457 card->options.sbp.supported_funcs = 0;
5458 card->info.diagass_support = 0;
5459 rc = qeth_query_ipassists(card, QETH_PROT_IPV4);
5460 if (rc == -ENOMEM)
5461 goto out;
5462 if (qeth_is_supported(card, IPA_IPV6)) {
5463 rc = qeth_query_ipassists(card, QETH_PROT_IPV6);
5464 if (rc == -ENOMEM)
5465 goto out;
5466 }
5467 if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
5468 rc = qeth_query_setadapterparms(card);
5469 if (rc < 0) {
5470 QETH_CARD_TEXT_(card, 2, "7err%d", rc);
5471 goto out;
5472 }
5473 }
5474 if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
5475 rc = qeth_query_setdiagass(card);
5476 if (rc)
5477 QETH_CARD_TEXT_(card, 2, "8err%d", rc);
5478 }
5479
5480 qeth_trace_features(card);
5481
5482 if (!qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP) ||
5483 (card->info.hwtrap && qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM)))
5484 card->info.hwtrap = 0;
5485
5486 if (card->options.isolation != ISOLATION_MODE_NONE) {
5487 rc = qeth_setadpparms_set_access_ctrl(card,
5488 card->options.isolation);
5489 if (rc)
5490 goto out;
5491 }
5492
5493 qeth_init_link_info(card);
5494
5495 rc = qeth_init_qdio_queues(card);
5496 if (rc) {
5497 QETH_CARD_TEXT_(card, 2, "9err%d", rc);
5498 goto out;
5499 }
5500
5501 return 0;
5502 out:
5503 dev_warn(&card->gdev->dev, "The qeth device driver failed to recover "
5504 "an error on the device\n");
5505 QETH_DBF_MESSAGE(2, "Initialization for device %x failed in hardsetup! rc=%d\n",
5506 CARD_DEVID(card), rc);
5507 return rc;
5508 }
5509
5510 static int qeth_set_online(struct qeth_card *card,
5511 const struct qeth_discipline *disc)
5512 {
5513 bool carrier_ok;
5514 int rc;
5515
5516 mutex_lock(&card->conf_mutex);
5517 QETH_CARD_TEXT(card, 2, "setonlin");
5518
5519 rc = qeth_hardsetup_card(card, &carrier_ok);
5520 if (rc) {
5521 QETH_CARD_TEXT_(card, 2, "2err%04x", rc);
5522 rc = -ENODEV;
5523 goto err_hardsetup;
5524 }
5525
5526 qeth_print_status_message(card);
5527
5528 if (card->dev->reg_state != NETREG_REGISTERED)
5529 /* no need for locking / error handling at this early stage: */
5530 qeth_set_real_num_tx_queues(card, qeth_tx_actual_queues(card));
5531
5532 rc = disc->set_online(card, carrier_ok);
5533 if (rc)
5534 goto err_online;
5535
5536 /* let user_space know that device is online */
5537 kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE);
5538
5539 mutex_unlock(&card->conf_mutex);
5540 return 0;
5541
5542 err_online:
5543 err_hardsetup:
5544 qeth_qdio_clear_card(card, 0);
5545 qeth_clear_working_pool_list(card);
5546 qeth_flush_local_addrs(card);
5547
5548 qeth_stop_channel(&card->data);
5549 qeth_stop_channel(&card->write);
5550 qeth_stop_channel(&card->read);
5551 qdio_free(CARD_DDEV(card));
5552
5553 mutex_unlock(&card->conf_mutex);
5554 return rc;
5555 }
5556
5557 int qeth_set_offline(struct qeth_card *card, const struct qeth_discipline *disc,
5558 bool resetting)
5559 {
5560 int rc, rc2, rc3;
5561
5562 mutex_lock(&card->conf_mutex);
5563 QETH_CARD_TEXT(card, 3, "setoffl");
5564
5565 if ((!resetting && card->info.hwtrap) || card->info.hwtrap == 2) {
5566 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
5567 card->info.hwtrap = 1;
5568 }
5569
5570 /* cancel any stalled cmd that might block the rtnl: */
5571 qeth_clear_ipacmd_list(card);
5572
5573 rtnl_lock();
5574 card->info.open_when_online = card->dev->flags & IFF_UP;
5575 dev_close(card->dev);
5576 netif_device_detach(card->dev);
5577 netif_carrier_off(card->dev);
5578 rtnl_unlock();
5579
5580 cancel_work_sync(&card->rx_mode_work);
5581
5582 disc->set_offline(card);
5583
5584 qeth_qdio_clear_card(card, 0);
5585 qeth_drain_output_queues(card);
5586 qeth_clear_working_pool_list(card);
5587 qeth_flush_local_addrs(card);
5588 card->info.promisc_mode = 0;
5589
5590 rc = qeth_stop_channel(&card->data);
5591 rc2 = qeth_stop_channel(&card->write);
5592 rc3 = qeth_stop_channel(&card->read);
5593 if (!rc)
5594 rc = (rc2) ? rc2 : rc3;
5595 if (rc)
5596 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
5597 qdio_free(CARD_DDEV(card));
5598
5599 /* let user_space know that device is offline */
5600 kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE);
5601
5602 mutex_unlock(&card->conf_mutex);
5603 return 0;
5604 }
5605 EXPORT_SYMBOL_GPL(qeth_set_offline);
5606
5607 static int qeth_do_reset(void *data)
5608 {
5609 const struct qeth_discipline *disc;
5610 struct qeth_card *card = data;
5611 int rc;
5612
5613 /* Lock-free, other users will block until we are done. */
5614 disc = card->discipline;
5615
5616 QETH_CARD_TEXT(card, 2, "recover1");
5617 if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
5618 return 0;
5619 QETH_CARD_TEXT(card, 2, "recover2");
5620 dev_warn(&card->gdev->dev,
5621 "A recovery process has been started for the device\n");
5622
5623 qeth_set_offline(card, disc, true);
5624 rc = qeth_set_online(card, disc);
5625 if (!rc) {
5626 dev_info(&card->gdev->dev,
5627 "Device successfully recovered!\n");
5628 } else {
5629 ccwgroup_set_offline(card->gdev);
5630 dev_warn(&card->gdev->dev,
5631 "The qeth device driver failed to recover an error on the device\n");
5632 }
5633 qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
5634 qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
5635 return 0;
5636 }
5637
5638 #if IS_ENABLED(CONFIG_QETH_L3)
5639 static void qeth_l3_rebuild_skb(struct qeth_card *card, struct sk_buff *skb,
5640 struct qeth_hdr *hdr)
5641 {
5642 struct af_iucv_trans_hdr *iucv = (struct af_iucv_trans_hdr *) skb->data;
5643 struct qeth_hdr_layer3 *l3_hdr = &hdr->hdr.l3;
5644 struct net_device *dev = skb->dev;
5645
5646 if (IS_IQD(card) && iucv->magic == ETH_P_AF_IUCV) {
5647 dev_hard_header(skb, dev, ETH_P_AF_IUCV, dev->dev_addr,
5648 "FAKELL", skb->len);
5649 return;
5650 }
5651
5652 if (!(l3_hdr->flags & QETH_HDR_PASSTHRU)) {
5653 u16 prot = (l3_hdr->flags & QETH_HDR_IPV6) ? ETH_P_IPV6 :
5654 ETH_P_IP;
5655 unsigned char tg_addr[ETH_ALEN];
5656
5657 skb_reset_network_header(skb);
5658 switch (l3_hdr->flags & QETH_HDR_CAST_MASK) {
5659 case QETH_CAST_MULTICAST:
5660 if (prot == ETH_P_IP)
5661 ip_eth_mc_map(ip_hdr(skb)->daddr, tg_addr);
5662 else
5663 ipv6_eth_mc_map(&ipv6_hdr(skb)->daddr, tg_addr);
5664 QETH_CARD_STAT_INC(card, rx_multicast);
5665 break;
5666 case QETH_CAST_BROADCAST:
5667 ether_addr_copy(tg_addr, dev->broadcast);
5668 QETH_CARD_STAT_INC(card, rx_multicast);
5669 break;
5670 default:
5671 if (card->options.sniffer)
5672 skb->pkt_type = PACKET_OTHERHOST;
5673 ether_addr_copy(tg_addr, dev->dev_addr);
5674 }
5675
5676 if (l3_hdr->ext_flags & QETH_HDR_EXT_SRC_MAC_ADDR)
5677 dev_hard_header(skb, dev, prot, tg_addr,
5678 &l3_hdr->next_hop.rx.src_mac, skb->len);
5679 else
5680 dev_hard_header(skb, dev, prot, tg_addr, "FAKELL",
5681 skb->len);
5682 }
5683
5684 /* copy VLAN tag from hdr into skb */
5685 if (!card->options.sniffer &&
5686 (l3_hdr->ext_flags & (QETH_HDR_EXT_VLAN_FRAME |
5687 QETH_HDR_EXT_INCLUDE_VLAN_TAG))) {
5688 u16 tag = (l3_hdr->ext_flags & QETH_HDR_EXT_VLAN_FRAME) ?
5689 l3_hdr->vlan_id :
5690 l3_hdr->next_hop.rx.vlan_id;
5691
5692 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag);
5693 }
5694 }
5695 #endif
5696
5697 static void qeth_receive_skb(struct qeth_card *card, struct sk_buff *skb,
5698 struct qeth_hdr *hdr, bool uses_frags)
5699 {
5700 struct napi_struct *napi = &card->napi;
5701 bool is_cso;
5702
5703 switch (hdr->hdr.l2.id) {
5704 case QETH_HEADER_TYPE_OSN:
5705 skb_push(skb, sizeof(*hdr));
5706 skb_copy_to_linear_data(skb, hdr, sizeof(*hdr));
5707 QETH_CARD_STAT_ADD(card, rx_bytes, skb->len);
5708 QETH_CARD_STAT_INC(card, rx_packets);
5709
5710 card->osn_info.data_cb(skb);
5711 return;
5712 #if IS_ENABLED(CONFIG_QETH_L3)
5713 case QETH_HEADER_TYPE_LAYER3:
5714 qeth_l3_rebuild_skb(card, skb, hdr);
5715 is_cso = hdr->hdr.l3.ext_flags & QETH_HDR_EXT_CSUM_TRANSP_REQ;
5716 break;
5717 #endif
5718 case QETH_HEADER_TYPE_LAYER2:
5719 is_cso = hdr->hdr.l2.flags[1] & QETH_HDR_EXT_CSUM_TRANSP_REQ;
5720 break;
5721 default:
5722 /* never happens */
5723 if (uses_frags)
5724 napi_free_frags(napi);
5725 else
5726 dev_kfree_skb_any(skb);
5727 return;
5728 }
5729
5730 if (is_cso && (card->dev->features & NETIF_F_RXCSUM)) {
5731 skb->ip_summed = CHECKSUM_UNNECESSARY;
5732 QETH_CARD_STAT_INC(card, rx_skb_csum);
5733 } else {
5734 skb->ip_summed = CHECKSUM_NONE;
5735 }
5736
5737 QETH_CARD_STAT_ADD(card, rx_bytes, skb->len);
5738 QETH_CARD_STAT_INC(card, rx_packets);
5739 if (skb_is_nonlinear(skb)) {
5740 QETH_CARD_STAT_INC(card, rx_sg_skbs);
5741 QETH_CARD_STAT_ADD(card, rx_sg_frags,
5742 skb_shinfo(skb)->nr_frags);
5743 }
5744
5745 if (uses_frags) {
5746 napi_gro_frags(napi);
5747 } else {
5748 skb->protocol = eth_type_trans(skb, skb->dev);
5749 napi_gro_receive(napi, skb);
5750 }
5751 }
5752
5753 static void qeth_create_skb_frag(struct sk_buff *skb, char *data, int data_len)
5754 {
5755 struct page *page = virt_to_page(data);
5756 unsigned int next_frag;
5757
5758 next_frag = skb_shinfo(skb)->nr_frags;
5759 get_page(page);
5760 skb_add_rx_frag(skb, next_frag, page, offset_in_page(data), data_len,
5761 data_len);
5762 }
5763
5764 static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale)
5765 {
5766 return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY);
5767 }
5768
5769 static int qeth_extract_skb(struct qeth_card *card,
5770 struct qeth_qdio_buffer *qethbuffer, u8 *element_no,
5771 int *__offset)
5772 {
5773 struct qeth_priv *priv = netdev_priv(card->dev);
5774 struct qdio_buffer *buffer = qethbuffer->buffer;
5775 struct napi_struct *napi = &card->napi;
5776 struct qdio_buffer_element *element;
5777 unsigned int linear_len = 0;
5778 bool uses_frags = false;
5779 int offset = *__offset;
5780 bool use_rx_sg = false;
5781 unsigned int headroom;
5782 struct qeth_hdr *hdr;
5783 struct sk_buff *skb;
5784 int skb_len = 0;
5785
5786 element = &buffer->element[*element_no];
5787
5788 next_packet:
5789 /* qeth_hdr must not cross element boundaries */
5790 while (element->length < offset + sizeof(struct qeth_hdr)) {
5791 if (qeth_is_last_sbale(element))
5792 return -ENODATA;
5793 element++;
5794 offset = 0;
5795 }
5796
5797 hdr = phys_to_virt(element->addr) + offset;
5798 offset += sizeof(*hdr);
5799 skb = NULL;
5800
5801 switch (hdr->hdr.l2.id) {
5802 case QETH_HEADER_TYPE_LAYER2:
5803 skb_len = hdr->hdr.l2.pkt_length;
5804 linear_len = ETH_HLEN;
5805 headroom = 0;
5806 break;
5807 case QETH_HEADER_TYPE_LAYER3:
5808 skb_len = hdr->hdr.l3.length;
5809 if (!IS_LAYER3(card)) {
5810 QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5811 goto walk_packet;
5812 }
5813
5814 if (hdr->hdr.l3.flags & QETH_HDR_PASSTHRU) {
5815 linear_len = ETH_HLEN;
5816 headroom = 0;
5817 break;
5818 }
5819
5820 if (hdr->hdr.l3.flags & QETH_HDR_IPV6)
5821 linear_len = sizeof(struct ipv6hdr);
5822 else
5823 linear_len = sizeof(struct iphdr);
5824 headroom = ETH_HLEN;
5825 break;
5826 case QETH_HEADER_TYPE_OSN:
5827 skb_len = hdr->hdr.osn.pdu_length;
5828 if (!IS_OSN(card)) {
5829 QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5830 goto walk_packet;
5831 }
5832
5833 linear_len = skb_len;
5834 headroom = sizeof(struct qeth_hdr);
5835 break;
5836 default:
5837 if (hdr->hdr.l2.id & QETH_HEADER_MASK_INVAL)
5838 QETH_CARD_STAT_INC(card, rx_frame_errors);
5839 else
5840 QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5841
5842 /* Can't determine packet length, drop the whole buffer. */
5843 return -EPROTONOSUPPORT;
5844 }
5845
5846 if (skb_len < linear_len) {
5847 QETH_CARD_STAT_INC(card, rx_dropped_runt);
5848 goto walk_packet;
5849 }
5850
5851 use_rx_sg = (card->options.cq == QETH_CQ_ENABLED) ||
5852 (skb_len > READ_ONCE(priv->rx_copybreak) &&
5853 !atomic_read(&card->force_alloc_skb) &&
5854 !IS_OSN(card));
5855
5856 if (use_rx_sg) {
5857 /* QETH_CQ_ENABLED only: */
5858 if (qethbuffer->rx_skb &&
5859 skb_tailroom(qethbuffer->rx_skb) >= linear_len + headroom) {
5860 skb = qethbuffer->rx_skb;
5861 qethbuffer->rx_skb = NULL;
5862 goto use_skb;
5863 }
5864
5865 skb = napi_get_frags(napi);
5866 if (!skb) {
5867 /* -ENOMEM, no point in falling back further. */
5868 QETH_CARD_STAT_INC(card, rx_dropped_nomem);
5869 goto walk_packet;
5870 }
5871
5872 if (skb_tailroom(skb) >= linear_len + headroom) {
5873 uses_frags = true;
5874 goto use_skb;
5875 }
5876
5877 netdev_info_once(card->dev,
5878 "Insufficient linear space in NAPI frags skb, need %u but have %u\n",
5879 linear_len + headroom, skb_tailroom(skb));
5880 /* Shouldn't happen. Don't optimize, fall back to linear skb. */
5881 }
5882
5883 linear_len = skb_len;
5884 skb = napi_alloc_skb(napi, linear_len + headroom);
5885 if (!skb) {
5886 QETH_CARD_STAT_INC(card, rx_dropped_nomem);
5887 goto walk_packet;
5888 }
5889
5890 use_skb:
5891 if (headroom)
5892 skb_reserve(skb, headroom);
5893 walk_packet:
5894 while (skb_len) {
5895 int data_len = min(skb_len, (int)(element->length - offset));
5896 char *data = phys_to_virt(element->addr) + offset;
5897
5898 skb_len -= data_len;
5899 offset += data_len;
5900
5901 /* Extract data from current element: */
5902 if (skb && data_len) {
5903 if (linear_len) {
5904 unsigned int copy_len;
5905
5906 copy_len = min_t(unsigned int, linear_len,
5907 data_len);
5908
5909 skb_put_data(skb, data, copy_len);
5910 linear_len -= copy_len;
5911 data_len -= copy_len;
5912 data += copy_len;
5913 }
5914
5915 if (data_len)
5916 qeth_create_skb_frag(skb, data, data_len);
5917 }
5918
5919 /* Step forward to next element: */
5920 if (skb_len) {
5921 if (qeth_is_last_sbale(element)) {
5922 QETH_CARD_TEXT(card, 4, "unexeob");
5923 QETH_CARD_HEX(card, 2, buffer, sizeof(void *));
5924 if (skb) {
5925 if (uses_frags)
5926 napi_free_frags(napi);
5927 else
5928 dev_kfree_skb_any(skb);
5929 QETH_CARD_STAT_INC(card,
5930 rx_length_errors);
5931 }
5932 return -EMSGSIZE;
5933 }
5934 element++;
5935 offset = 0;
5936 }
5937 }
5938
5939 /* This packet was skipped, go get another one: */
5940 if (!skb)
5941 goto next_packet;
5942
5943 *element_no = element - &buffer->element[0];
5944 *__offset = offset;
5945
5946 qeth_receive_skb(card, skb, hdr, uses_frags);
5947 return 0;
5948 }
5949
5950 static unsigned int qeth_extract_skbs(struct qeth_card *card, int budget,
5951 struct qeth_qdio_buffer *buf, bool *done)
5952 {
5953 unsigned int work_done = 0;
5954
5955 while (budget) {
5956 if (qeth_extract_skb(card, buf, &card->rx.buf_element,
5957 &card->rx.e_offset)) {
5958 *done = true;
5959 break;
5960 }
5961
5962 work_done++;
5963 budget--;
5964 }
5965
5966 return work_done;
5967 }
5968
5969 static unsigned int qeth_rx_poll(struct qeth_card *card, int budget)
5970 {
5971 struct qeth_rx *ctx = &card->rx;
5972 unsigned int work_done = 0;
5973
5974 while (budget > 0) {
5975 struct qeth_qdio_buffer *buffer;
5976 unsigned int skbs_done = 0;
5977 bool done = false;
5978
5979 /* Fetch completed RX buffers: */
5980 if (!card->rx.b_count) {
5981 card->rx.qdio_err = 0;
5982 card->rx.b_count = qdio_get_next_buffers(
5983 card->data.ccwdev, 0, &card->rx.b_index,
5984 &card->rx.qdio_err);
5985 if (card->rx.b_count <= 0) {
5986 card->rx.b_count = 0;
5987 break;
5988 }
5989 }
5990
5991 /* Process one completed RX buffer: */
5992 buffer = &card->qdio.in_q->bufs[card->rx.b_index];
5993 if (!(card->rx.qdio_err &&
5994 qeth_check_qdio_errors(card, buffer->buffer,
5995 card->rx.qdio_err, "qinerr")))
5996 skbs_done = qeth_extract_skbs(card, budget, buffer,
5997 &done);
5998 else
5999 done = true;
6000
6001 work_done += skbs_done;
6002 budget -= skbs_done;
6003
6004 if (done) {
6005 QETH_CARD_STAT_INC(card, rx_bufs);
6006 qeth_put_buffer_pool_entry(card, buffer->pool_entry);
6007 buffer->pool_entry = NULL;
6008 card->rx.b_count--;
6009 ctx->bufs_refill++;
6010 ctx->bufs_refill -= qeth_rx_refill_queue(card,
6011 ctx->bufs_refill);
6012
6013 /* Step forward to next buffer: */
6014 card->rx.b_index = QDIO_BUFNR(card->rx.b_index + 1);
6015 card->rx.buf_element = 0;
6016 card->rx.e_offset = 0;
6017 }
6018 }
6019
6020 return work_done;
6021 }
6022
6023 static void qeth_cq_poll(struct qeth_card *card)
6024 {
6025 unsigned int work_done = 0;
6026
6027 while (work_done < QDIO_MAX_BUFFERS_PER_Q) {
6028 unsigned int start, error;
6029 int completed;
6030
6031 completed = qdio_inspect_queue(CARD_DDEV(card), 1, true, &start,
6032 &error);
6033 if (completed <= 0)
6034 return;
6035
6036 qeth_qdio_cq_handler(card, error, 1, start, completed);
6037 work_done += completed;
6038 }
6039 }
6040
6041 int qeth_poll(struct napi_struct *napi, int budget)
6042 {
6043 struct qeth_card *card = container_of(napi, struct qeth_card, napi);
6044 unsigned int work_done;
6045
6046 work_done = qeth_rx_poll(card, budget);
6047
6048 if (card->options.cq == QETH_CQ_ENABLED)
6049 qeth_cq_poll(card);
6050
6051 if (budget) {
6052 struct qeth_rx *ctx = &card->rx;
6053
6054 /* Process any substantial refill backlog: */
6055 ctx->bufs_refill -= qeth_rx_refill_queue(card, ctx->bufs_refill);
6056
6057 /* Exhausted the RX budget. Keep IRQ disabled, we get called again. */
6058 if (work_done >= budget)
6059 return work_done;
6060 }
6061
6062 if (napi_complete_done(napi, work_done) &&
6063 qdio_start_irq(CARD_DDEV(card)))
6064 napi_schedule(napi);
6065
6066 return work_done;
6067 }
6068 EXPORT_SYMBOL_GPL(qeth_poll);
6069
6070 static void qeth_iqd_tx_complete(struct qeth_qdio_out_q *queue,
6071 unsigned int bidx, bool error, int budget)
6072 {
6073 struct qeth_qdio_out_buffer *buffer = queue->bufs[bidx];
6074 u8 sflags = buffer->buffer->element[15].sflags;
6075 struct qeth_card *card = queue->card;
6076
6077 if (queue->bufstates && (queue->bufstates[bidx].flags &
6078 QDIO_OUTBUF_STATE_FLAG_PENDING)) {
6079 WARN_ON_ONCE(card->options.cq != QETH_CQ_ENABLED);
6080
6081 QETH_CARD_TEXT_(card, 5, "pel%u", bidx);
6082
6083 switch (atomic_cmpxchg(&buffer->state,
6084 QETH_QDIO_BUF_PRIMED,
6085 QETH_QDIO_BUF_PENDING)) {
6086 case QETH_QDIO_BUF_PRIMED:
6087 /* We have initial ownership, no QAOB (yet): */
6088 qeth_notify_skbs(queue, buffer, TX_NOTIFY_PENDING);
6089
6090 /* Handle race with qeth_qdio_handle_aob(): */
6091 switch (atomic_xchg(&buffer->state,
6092 QETH_QDIO_BUF_NEED_QAOB)) {
6093 case QETH_QDIO_BUF_PENDING:
6094 /* No concurrent QAOB notification. */
6095
6096 /* Prepare the queue slot for immediate re-use: */
6097 qeth_scrub_qdio_buffer(buffer->buffer, queue->max_elements);
6098 if (qeth_init_qdio_out_buf(queue, bidx)) {
6099 QETH_CARD_TEXT(card, 2, "outofbuf");
6100 qeth_schedule_recovery(card);
6101 }
6102
6103 /* Skip clearing the buffer: */
6104 return;
6105 case QETH_QDIO_BUF_QAOB_OK:
6106 qeth_notify_skbs(queue, buffer,
6107 TX_NOTIFY_DELAYED_OK);
6108 error = false;
6109 break;
6110 case QETH_QDIO_BUF_QAOB_ERROR:
6111 qeth_notify_skbs(queue, buffer,
6112 TX_NOTIFY_DELAYED_GENERALERROR);
6113 error = true;
6114 break;
6115 default:
6116 WARN_ON_ONCE(1);
6117 }
6118
6119 break;
6120 case QETH_QDIO_BUF_QAOB_OK:
6121 /* qeth_qdio_handle_aob() already received a QAOB: */
6122 qeth_notify_skbs(queue, buffer, TX_NOTIFY_OK);
6123 error = false;
6124 break;
6125 case QETH_QDIO_BUF_QAOB_ERROR:
6126 /* qeth_qdio_handle_aob() already received a QAOB: */
6127 qeth_notify_skbs(queue, buffer, TX_NOTIFY_GENERALERROR);
6128 error = true;
6129 break;
6130 default:
6131 WARN_ON_ONCE(1);
6132 }
6133 } else if (card->options.cq == QETH_CQ_ENABLED) {
6134 qeth_notify_skbs(queue, buffer,
6135 qeth_compute_cq_notification(sflags, 0));
6136 }
6137
6138 qeth_clear_output_buffer(queue, buffer, error, budget);
6139 }
6140
6141 static int qeth_tx_poll(struct napi_struct *napi, int budget)
6142 {
6143 struct qeth_qdio_out_q *queue = qeth_napi_to_out_queue(napi);
6144 unsigned int queue_no = queue->queue_no;
6145 struct qeth_card *card = queue->card;
6146 struct net_device *dev = card->dev;
6147 unsigned int work_done = 0;
6148 struct netdev_queue *txq;
6149
6150 txq = netdev_get_tx_queue(dev, qeth_iqd_translate_txq(dev, queue_no));
6151
6152 while (1) {
6153 unsigned int start, error, i;
6154 unsigned int packets = 0;
6155 unsigned int bytes = 0;
6156 int completed;
6157
6158 if (qeth_out_queue_is_empty(queue)) {
6159 napi_complete(napi);
6160 return 0;
6161 }
6162
6163 /* Give the CPU a breather: */
6164 if (work_done >= QDIO_MAX_BUFFERS_PER_Q) {
6165 QETH_TXQ_STAT_INC(queue, completion_yield);
6166 if (napi_complete_done(napi, 0))
6167 napi_schedule(napi);
6168 return 0;
6169 }
6170
6171 completed = qdio_inspect_queue(CARD_DDEV(card), queue_no, false,
6172 &start, &error);
6173 if (completed <= 0) {
6174 /* Ensure we see TX completion for pending work: */
6175 if (napi_complete_done(napi, 0))
6176 qeth_tx_arm_timer(queue, QETH_TX_TIMER_USECS);
6177 return 0;
6178 }
6179
6180 for (i = start; i < start + completed; i++) {
6181 struct qeth_qdio_out_buffer *buffer;
6182 unsigned int bidx = QDIO_BUFNR(i);
6183
6184 buffer = queue->bufs[bidx];
6185 packets += buffer->frames;
6186 bytes += buffer->bytes;
6187
6188 qeth_handle_send_error(card, buffer, error);
6189 qeth_iqd_tx_complete(queue, bidx, error, budget);
6190 qeth_cleanup_handled_pending(queue, bidx, false);
6191 }
6192
6193 netdev_tx_completed_queue(txq, packets, bytes);
6194 atomic_sub(completed, &queue->used_buffers);
6195 work_done += completed;
6196
6197 /* xmit may have observed the full-condition, but not yet
6198 * stopped the txq. In which case the code below won't trigger.
6199 * So before returning, xmit will re-check the txq's fill level
6200 * and wake it up if needed.
6201 */
6202 if (netif_tx_queue_stopped(txq) &&
6203 !qeth_out_queue_is_full(queue))
6204 netif_tx_wake_queue(txq);
6205 }
6206 }
6207
6208 static int qeth_setassparms_inspect_rc(struct qeth_ipa_cmd *cmd)
6209 {
6210 if (!cmd->hdr.return_code)
6211 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
6212 return cmd->hdr.return_code;
6213 }
6214
6215 static int qeth_setassparms_get_caps_cb(struct qeth_card *card,
6216 struct qeth_reply *reply,
6217 unsigned long data)
6218 {
6219 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6220 struct qeth_ipa_caps *caps = reply->param;
6221
6222 if (qeth_setassparms_inspect_rc(cmd))
6223 return -EIO;
6224
6225 caps->supported = cmd->data.setassparms.data.caps.supported;
6226 caps->enabled = cmd->data.setassparms.data.caps.enabled;
6227 return 0;
6228 }
6229
6230 int qeth_setassparms_cb(struct qeth_card *card,
6231 struct qeth_reply *reply, unsigned long data)
6232 {
6233 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6234
6235 QETH_CARD_TEXT(card, 4, "defadpcb");
6236
6237 if (cmd->hdr.return_code)
6238 return -EIO;
6239
6240 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
6241 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
6242 card->options.ipa4.enabled = cmd->hdr.assists.enabled;
6243 if (cmd->hdr.prot_version == QETH_PROT_IPV6)
6244 card->options.ipa6.enabled = cmd->hdr.assists.enabled;
6245 return 0;
6246 }
6247 EXPORT_SYMBOL_GPL(qeth_setassparms_cb);
6248
6249 struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card,
6250 enum qeth_ipa_funcs ipa_func,
6251 u16 cmd_code,
6252 unsigned int data_length,
6253 enum qeth_prot_versions prot)
6254 {
6255 struct qeth_ipacmd_setassparms *setassparms;
6256 struct qeth_ipacmd_setassparms_hdr *hdr;
6257 struct qeth_cmd_buffer *iob;
6258
6259 QETH_CARD_TEXT(card, 4, "getasscm");
6260 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETASSPARMS, prot,
6261 data_length +
6262 offsetof(struct qeth_ipacmd_setassparms,
6263 data));
6264 if (!iob)
6265 return NULL;
6266
6267 setassparms = &__ipa_cmd(iob)->data.setassparms;
6268 setassparms->assist_no = ipa_func;
6269
6270 hdr = &setassparms->hdr;
6271 hdr->length = sizeof(*hdr) + data_length;
6272 hdr->command_code = cmd_code;
6273 return iob;
6274 }
6275 EXPORT_SYMBOL_GPL(qeth_get_setassparms_cmd);
6276
6277 int qeth_send_simple_setassparms_prot(struct qeth_card *card,
6278 enum qeth_ipa_funcs ipa_func,
6279 u16 cmd_code, u32 *data,
6280 enum qeth_prot_versions prot)
6281 {
6282 unsigned int length = data ? SETASS_DATA_SIZEOF(flags_32bit) : 0;
6283 struct qeth_cmd_buffer *iob;
6284
6285 QETH_CARD_TEXT_(card, 4, "simassp%i", prot);
6286 iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code, length, prot);
6287 if (!iob)
6288 return -ENOMEM;
6289
6290 if (data)
6291 __ipa_cmd(iob)->data.setassparms.data.flags_32bit = *data;
6292 return qeth_send_ipa_cmd(card, iob, qeth_setassparms_cb, NULL);
6293 }
6294 EXPORT_SYMBOL_GPL(qeth_send_simple_setassparms_prot);
6295
6296 static void qeth_unregister_dbf_views(void)
6297 {
6298 int x;
6299
6300 for (x = 0; x < QETH_DBF_INFOS; x++) {
6301 debug_unregister(qeth_dbf[x].id);
6302 qeth_dbf[x].id = NULL;
6303 }
6304 }
6305
6306 void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...)
6307 {
6308 char dbf_txt_buf[32];
6309 va_list args;
6310
6311 if (!debug_level_enabled(id, level))
6312 return;
6313 va_start(args, fmt);
6314 vsnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
6315 va_end(args);
6316 debug_text_event(id, level, dbf_txt_buf);
6317 }
6318 EXPORT_SYMBOL_GPL(qeth_dbf_longtext);
6319
6320 static int qeth_register_dbf_views(void)
6321 {
6322 int ret;
6323 int x;
6324
6325 for (x = 0; x < QETH_DBF_INFOS; x++) {
6326 /* register the areas */
6327 qeth_dbf[x].id = debug_register(qeth_dbf[x].name,
6328 qeth_dbf[x].pages,
6329 qeth_dbf[x].areas,
6330 qeth_dbf[x].len);
6331 if (qeth_dbf[x].id == NULL) {
6332 qeth_unregister_dbf_views();
6333 return -ENOMEM;
6334 }
6335
6336 /* register a view */
6337 ret = debug_register_view(qeth_dbf[x].id, qeth_dbf[x].view);
6338 if (ret) {
6339 qeth_unregister_dbf_views();
6340 return ret;
6341 }
6342
6343 /* set a passing level */
6344 debug_set_level(qeth_dbf[x].id, qeth_dbf[x].level);
6345 }
6346
6347 return 0;
6348 }
6349
6350 static DEFINE_MUTEX(qeth_mod_mutex); /* for synchronized module loading */
6351
6352 int qeth_core_load_discipline(struct qeth_card *card,
6353 enum qeth_discipline_id discipline)
6354 {
6355 mutex_lock(&qeth_mod_mutex);
6356 switch (discipline) {
6357 case QETH_DISCIPLINE_LAYER3:
6358 card->discipline = try_then_request_module(
6359 symbol_get(qeth_l3_discipline), "qeth_l3");
6360 break;
6361 case QETH_DISCIPLINE_LAYER2:
6362 card->discipline = try_then_request_module(
6363 symbol_get(qeth_l2_discipline), "qeth_l2");
6364 break;
6365 default:
6366 break;
6367 }
6368 mutex_unlock(&qeth_mod_mutex);
6369
6370 if (!card->discipline) {
6371 dev_err(&card->gdev->dev, "There is no kernel module to "
6372 "support discipline %d\n", discipline);
6373 return -EINVAL;
6374 }
6375
6376 card->options.layer = discipline;
6377 return 0;
6378 }
6379
6380 void qeth_core_free_discipline(struct qeth_card *card)
6381 {
6382 if (IS_LAYER2(card))
6383 symbol_put(qeth_l2_discipline);
6384 else
6385 symbol_put(qeth_l3_discipline);
6386 card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
6387 card->discipline = NULL;
6388 }
6389
6390 const struct device_type qeth_generic_devtype = {
6391 .name = "qeth_generic",
6392 };
6393 EXPORT_SYMBOL_GPL(qeth_generic_devtype);
6394
6395 static const struct device_type qeth_osn_devtype = {
6396 .name = "qeth_osn",
6397 };
6398
6399 #define DBF_NAME_LEN 20
6400
6401 struct qeth_dbf_entry {
6402 char dbf_name[DBF_NAME_LEN];
6403 debug_info_t *dbf_info;
6404 struct list_head dbf_list;
6405 };
6406
6407 static LIST_HEAD(qeth_dbf_list);
6408 static DEFINE_MUTEX(qeth_dbf_list_mutex);
6409
6410 static debug_info_t *qeth_get_dbf_entry(char *name)
6411 {
6412 struct qeth_dbf_entry *entry;
6413 debug_info_t *rc = NULL;
6414
6415 mutex_lock(&qeth_dbf_list_mutex);
6416 list_for_each_entry(entry, &qeth_dbf_list, dbf_list) {
6417 if (strcmp(entry->dbf_name, name) == 0) {
6418 rc = entry->dbf_info;
6419 break;
6420 }
6421 }
6422 mutex_unlock(&qeth_dbf_list_mutex);
6423 return rc;
6424 }
6425
6426 static int qeth_add_dbf_entry(struct qeth_card *card, char *name)
6427 {
6428 struct qeth_dbf_entry *new_entry;
6429
6430 card->debug = debug_register(name, 2, 1, 8);
6431 if (!card->debug) {
6432 QETH_DBF_TEXT_(SETUP, 2, "%s", "qcdbf");
6433 goto err;
6434 }
6435 if (debug_register_view(card->debug, &debug_hex_ascii_view))
6436 goto err_dbg;
6437 new_entry = kzalloc(sizeof(struct qeth_dbf_entry), GFP_KERNEL);
6438 if (!new_entry)
6439 goto err_dbg;
6440 strncpy(new_entry->dbf_name, name, DBF_NAME_LEN);
6441 new_entry->dbf_info = card->debug;
6442 mutex_lock(&qeth_dbf_list_mutex);
6443 list_add(&new_entry->dbf_list, &qeth_dbf_list);
6444 mutex_unlock(&qeth_dbf_list_mutex);
6445
6446 return 0;
6447
6448 err_dbg:
6449 debug_unregister(card->debug);
6450 err:
6451 return -ENOMEM;
6452 }
6453
6454 static void qeth_clear_dbf_list(void)
6455 {
6456 struct qeth_dbf_entry *entry, *tmp;
6457
6458 mutex_lock(&qeth_dbf_list_mutex);
6459 list_for_each_entry_safe(entry, tmp, &qeth_dbf_list, dbf_list) {
6460 list_del(&entry->dbf_list);
6461 debug_unregister(entry->dbf_info);
6462 kfree(entry);
6463 }
6464 mutex_unlock(&qeth_dbf_list_mutex);
6465 }
6466
6467 static struct net_device *qeth_alloc_netdev(struct qeth_card *card)
6468 {
6469 struct net_device *dev;
6470 struct qeth_priv *priv;
6471
6472 switch (card->info.type) {
6473 case QETH_CARD_TYPE_IQD:
6474 dev = alloc_netdev_mqs(sizeof(*priv), "hsi%d", NET_NAME_UNKNOWN,
6475 ether_setup, QETH_MAX_OUT_QUEUES, 1);
6476 break;
6477 case QETH_CARD_TYPE_OSM:
6478 dev = alloc_etherdev(sizeof(*priv));
6479 break;
6480 case QETH_CARD_TYPE_OSN:
6481 dev = alloc_netdev(sizeof(*priv), "osn%d", NET_NAME_UNKNOWN,
6482 ether_setup);
6483 break;
6484 default:
6485 dev = alloc_etherdev_mqs(sizeof(*priv), QETH_MAX_OUT_QUEUES, 1);
6486 }
6487
6488 if (!dev)
6489 return NULL;
6490
6491 priv = netdev_priv(dev);
6492 priv->rx_copybreak = QETH_RX_COPYBREAK;
6493 priv->tx_wanted_queues = IS_IQD(card) ? QETH_IQD_MIN_TXQ : 1;
6494
6495 dev->ml_priv = card;
6496 dev->watchdog_timeo = QETH_TX_TIMEOUT;
6497 dev->min_mtu = IS_OSN(card) ? 64 : 576;
6498 /* initialized when device first goes online: */
6499 dev->max_mtu = 0;
6500 dev->mtu = 0;
6501 SET_NETDEV_DEV(dev, &card->gdev->dev);
6502 netif_carrier_off(dev);
6503
6504 if (IS_OSN(card)) {
6505 dev->ethtool_ops = &qeth_osn_ethtool_ops;
6506 } else {
6507 dev->ethtool_ops = &qeth_ethtool_ops;
6508 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
6509 dev->hw_features |= NETIF_F_SG;
6510 dev->vlan_features |= NETIF_F_SG;
6511 if (IS_IQD(card))
6512 dev->features |= NETIF_F_SG;
6513 }
6514
6515 return dev;
6516 }
6517
6518 struct net_device *qeth_clone_netdev(struct net_device *orig)
6519 {
6520 struct net_device *clone = qeth_alloc_netdev(orig->ml_priv);
6521
6522 if (!clone)
6523 return NULL;
6524
6525 clone->dev_port = orig->dev_port;
6526 return clone;
6527 }
6528
6529 static int qeth_core_probe_device(struct ccwgroup_device *gdev)
6530 {
6531 struct qeth_card *card;
6532 struct device *dev;
6533 int rc;
6534 enum qeth_discipline_id enforced_disc;
6535 char dbf_name[DBF_NAME_LEN];
6536
6537 QETH_DBF_TEXT(SETUP, 2, "probedev");
6538
6539 dev = &gdev->dev;
6540 if (!get_device(dev))
6541 return -ENODEV;
6542
6543 QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev));
6544
6545 card = qeth_alloc_card(gdev);
6546 if (!card) {
6547 QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM);
6548 rc = -ENOMEM;
6549 goto err_dev;
6550 }
6551
6552 snprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
6553 dev_name(&gdev->dev));
6554 card->debug = qeth_get_dbf_entry(dbf_name);
6555 if (!card->debug) {
6556 rc = qeth_add_dbf_entry(card, dbf_name);
6557 if (rc)
6558 goto err_card;
6559 }
6560
6561 qeth_setup_card(card);
6562 card->dev = qeth_alloc_netdev(card);
6563 if (!card->dev) {
6564 rc = -ENOMEM;
6565 goto err_card;
6566 }
6567
6568 qeth_determine_capabilities(card);
6569 qeth_set_blkt_defaults(card);
6570
6571 card->qdio.no_out_queues = card->dev->num_tx_queues;
6572 rc = qeth_update_from_chp_desc(card);
6573 if (rc)
6574 goto err_chp_desc;
6575
6576 if (IS_OSN(card))
6577 gdev->dev.groups = qeth_osn_dev_groups;
6578 else
6579 gdev->dev.groups = qeth_dev_groups;
6580
6581 enforced_disc = qeth_enforce_discipline(card);
6582 switch (enforced_disc) {
6583 case QETH_DISCIPLINE_UNDETERMINED:
6584 gdev->dev.type = &qeth_generic_devtype;
6585 break;
6586 default:
6587 card->info.layer_enforced = true;
6588 /* It's so early that we don't need the discipline_mutex yet. */
6589 rc = qeth_core_load_discipline(card, enforced_disc);
6590 if (rc)
6591 goto err_load;
6592
6593 gdev->dev.type = IS_OSN(card) ? &qeth_osn_devtype :
6594 card->discipline->devtype;
6595 rc = card->discipline->setup(card->gdev);
6596 if (rc)
6597 goto err_disc;
6598 break;
6599 }
6600
6601 return 0;
6602
6603 err_disc:
6604 qeth_core_free_discipline(card);
6605 err_load:
6606 err_chp_desc:
6607 free_netdev(card->dev);
6608 err_card:
6609 qeth_core_free_card(card);
6610 err_dev:
6611 put_device(dev);
6612 return rc;
6613 }
6614
6615 static void qeth_core_remove_device(struct ccwgroup_device *gdev)
6616 {
6617 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6618
6619 QETH_CARD_TEXT(card, 2, "removedv");
6620
6621 mutex_lock(&card->discipline_mutex);
6622 if (card->discipline) {
6623 card->discipline->remove(gdev);
6624 qeth_core_free_discipline(card);
6625 }
6626 mutex_unlock(&card->discipline_mutex);
6627
6628 qeth_free_qdio_queues(card);
6629
6630 free_netdev(card->dev);
6631 qeth_core_free_card(card);
6632 put_device(&gdev->dev);
6633 }
6634
6635 static int qeth_core_set_online(struct ccwgroup_device *gdev)
6636 {
6637 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6638 int rc = 0;
6639 enum qeth_discipline_id def_discipline;
6640
6641 mutex_lock(&card->discipline_mutex);
6642 if (!card->discipline) {
6643 def_discipline = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
6644 QETH_DISCIPLINE_LAYER2;
6645 rc = qeth_core_load_discipline(card, def_discipline);
6646 if (rc)
6647 goto err;
6648 rc = card->discipline->setup(card->gdev);
6649 if (rc) {
6650 qeth_core_free_discipline(card);
6651 goto err;
6652 }
6653 }
6654
6655 rc = qeth_set_online(card, card->discipline);
6656
6657 err:
6658 mutex_unlock(&card->discipline_mutex);
6659 return rc;
6660 }
6661
6662 static int qeth_core_set_offline(struct ccwgroup_device *gdev)
6663 {
6664 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6665 int rc;
6666
6667 mutex_lock(&card->discipline_mutex);
6668 rc = qeth_set_offline(card, card->discipline, false);
6669 mutex_unlock(&card->discipline_mutex);
6670
6671 return rc;
6672 }
6673
6674 static void qeth_core_shutdown(struct ccwgroup_device *gdev)
6675 {
6676 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6677
6678 qeth_set_allowed_threads(card, 0, 1);
6679 if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
6680 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
6681 qeth_qdio_clear_card(card, 0);
6682 qeth_drain_output_queues(card);
6683 qdio_free(CARD_DDEV(card));
6684 }
6685
6686 static ssize_t group_store(struct device_driver *ddrv, const char *buf,
6687 size_t count)
6688 {
6689 int err;
6690
6691 err = ccwgroup_create_dev(qeth_core_root_dev, to_ccwgroupdrv(ddrv), 3,
6692 buf);
6693
6694 return err ? err : count;
6695 }
6696 static DRIVER_ATTR_WO(group);
6697
6698 static struct attribute *qeth_drv_attrs[] = {
6699 &driver_attr_group.attr,
6700 NULL,
6701 };
6702 static struct attribute_group qeth_drv_attr_group = {
6703 .attrs = qeth_drv_attrs,
6704 };
6705 static const struct attribute_group *qeth_drv_attr_groups[] = {
6706 &qeth_drv_attr_group,
6707 NULL,
6708 };
6709
6710 static struct ccwgroup_driver qeth_core_ccwgroup_driver = {
6711 .driver = {
6712 .groups = qeth_drv_attr_groups,
6713 .owner = THIS_MODULE,
6714 .name = "qeth",
6715 },
6716 .ccw_driver = &qeth_ccw_driver,
6717 .setup = qeth_core_probe_device,
6718 .remove = qeth_core_remove_device,
6719 .set_online = qeth_core_set_online,
6720 .set_offline = qeth_core_set_offline,
6721 .shutdown = qeth_core_shutdown,
6722 };
6723
6724 struct qeth_card *qeth_get_card_by_busid(char *bus_id)
6725 {
6726 struct ccwgroup_device *gdev;
6727 struct qeth_card *card;
6728
6729 gdev = get_ccwgroupdev_by_busid(&qeth_core_ccwgroup_driver, bus_id);
6730 if (!gdev)
6731 return NULL;
6732
6733 card = dev_get_drvdata(&gdev->dev);
6734 put_device(&gdev->dev);
6735 return card;
6736 }
6737 EXPORT_SYMBOL_GPL(qeth_get_card_by_busid);
6738
6739 int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
6740 {
6741 struct qeth_card *card = dev->ml_priv;
6742 struct mii_ioctl_data *mii_data;
6743 int rc = 0;
6744
6745 switch (cmd) {
6746 case SIOC_QETH_ADP_SET_SNMP_CONTROL:
6747 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
6748 break;
6749 case SIOC_QETH_GET_CARD_TYPE:
6750 if ((IS_OSD(card) || IS_OSM(card) || IS_OSX(card)) &&
6751 !IS_VM_NIC(card))
6752 return 1;
6753 return 0;
6754 case SIOCGMIIPHY:
6755 mii_data = if_mii(rq);
6756 mii_data->phy_id = 0;
6757 break;
6758 case SIOCGMIIREG:
6759 mii_data = if_mii(rq);
6760 if (mii_data->phy_id != 0)
6761 rc = -EINVAL;
6762 else
6763 mii_data->val_out = qeth_mdio_read(dev,
6764 mii_data->phy_id, mii_data->reg_num);
6765 break;
6766 case SIOC_QETH_QUERY_OAT:
6767 rc = qeth_query_oat_command(card, rq->ifr_ifru.ifru_data);
6768 break;
6769 default:
6770 if (card->discipline->do_ioctl)
6771 rc = card->discipline->do_ioctl(dev, rq, cmd);
6772 else
6773 rc = -EOPNOTSUPP;
6774 }
6775 if (rc)
6776 QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
6777 return rc;
6778 }
6779 EXPORT_SYMBOL_GPL(qeth_do_ioctl);
6780
6781 static int qeth_start_csum_cb(struct qeth_card *card, struct qeth_reply *reply,
6782 unsigned long data)
6783 {
6784 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6785 u32 *features = reply->param;
6786
6787 if (qeth_setassparms_inspect_rc(cmd))
6788 return -EIO;
6789
6790 *features = cmd->data.setassparms.data.flags_32bit;
6791 return 0;
6792 }
6793
6794 static int qeth_set_csum_off(struct qeth_card *card, enum qeth_ipa_funcs cstype,
6795 enum qeth_prot_versions prot)
6796 {
6797 return qeth_send_simple_setassparms_prot(card, cstype, IPA_CMD_ASS_STOP,
6798 NULL, prot);
6799 }
6800
6801 static int qeth_set_csum_on(struct qeth_card *card, enum qeth_ipa_funcs cstype,
6802 enum qeth_prot_versions prot, u8 *lp2lp)
6803 {
6804 u32 required_features = QETH_IPA_CHECKSUM_UDP | QETH_IPA_CHECKSUM_TCP;
6805 struct qeth_cmd_buffer *iob;
6806 struct qeth_ipa_caps caps;
6807 u32 features;
6808 int rc;
6809
6810 /* some L3 HW requires combined L3+L4 csum offload: */
6811 if (IS_LAYER3(card) && prot == QETH_PROT_IPV4 &&
6812 cstype == IPA_OUTBOUND_CHECKSUM)
6813 required_features |= QETH_IPA_CHECKSUM_IP_HDR;
6814
6815 iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_START, 0,
6816 prot);
6817 if (!iob)
6818 return -ENOMEM;
6819
6820 rc = qeth_send_ipa_cmd(card, iob, qeth_start_csum_cb, &features);
6821 if (rc)
6822 return rc;
6823
6824 if ((required_features & features) != required_features) {
6825 qeth_set_csum_off(card, cstype, prot);
6826 return -EOPNOTSUPP;
6827 }
6828
6829 iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_ENABLE,
6830 SETASS_DATA_SIZEOF(flags_32bit),
6831 prot);
6832 if (!iob) {
6833 qeth_set_csum_off(card, cstype, prot);
6834 return -ENOMEM;
6835 }
6836
6837 if (features & QETH_IPA_CHECKSUM_LP2LP)
6838 required_features |= QETH_IPA_CHECKSUM_LP2LP;
6839 __ipa_cmd(iob)->data.setassparms.data.flags_32bit = required_features;
6840 rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6841 if (rc) {
6842 qeth_set_csum_off(card, cstype, prot);
6843 return rc;
6844 }
6845
6846 if (!qeth_ipa_caps_supported(&caps, required_features) ||
6847 !qeth_ipa_caps_enabled(&caps, required_features)) {
6848 qeth_set_csum_off(card, cstype, prot);
6849 return -EOPNOTSUPP;
6850 }
6851
6852 dev_info(&card->gdev->dev, "HW Checksumming (%sbound IPv%d) enabled\n",
6853 cstype == IPA_INBOUND_CHECKSUM ? "in" : "out", prot);
6854
6855 if (lp2lp)
6856 *lp2lp = qeth_ipa_caps_enabled(&caps, QETH_IPA_CHECKSUM_LP2LP);
6857
6858 return 0;
6859 }
6860
6861 static int qeth_set_ipa_csum(struct qeth_card *card, bool on, int cstype,
6862 enum qeth_prot_versions prot, u8 *lp2lp)
6863 {
6864 return on ? qeth_set_csum_on(card, cstype, prot, lp2lp) :
6865 qeth_set_csum_off(card, cstype, prot);
6866 }
6867
6868 static int qeth_start_tso_cb(struct qeth_card *card, struct qeth_reply *reply,
6869 unsigned long data)
6870 {
6871 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6872 struct qeth_tso_start_data *tso_data = reply->param;
6873
6874 if (qeth_setassparms_inspect_rc(cmd))
6875 return -EIO;
6876
6877 tso_data->mss = cmd->data.setassparms.data.tso.mss;
6878 tso_data->supported = cmd->data.setassparms.data.tso.supported;
6879 return 0;
6880 }
6881
6882 static int qeth_set_tso_off(struct qeth_card *card,
6883 enum qeth_prot_versions prot)
6884 {
6885 return qeth_send_simple_setassparms_prot(card, IPA_OUTBOUND_TSO,
6886 IPA_CMD_ASS_STOP, NULL, prot);
6887 }
6888
6889 static int qeth_set_tso_on(struct qeth_card *card,
6890 enum qeth_prot_versions prot)
6891 {
6892 struct qeth_tso_start_data tso_data;
6893 struct qeth_cmd_buffer *iob;
6894 struct qeth_ipa_caps caps;
6895 int rc;
6896
6897 iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6898 IPA_CMD_ASS_START, 0, prot);
6899 if (!iob)
6900 return -ENOMEM;
6901
6902 rc = qeth_send_ipa_cmd(card, iob, qeth_start_tso_cb, &tso_data);
6903 if (rc)
6904 return rc;
6905
6906 if (!tso_data.mss || !(tso_data.supported & QETH_IPA_LARGE_SEND_TCP)) {
6907 qeth_set_tso_off(card, prot);
6908 return -EOPNOTSUPP;
6909 }
6910
6911 iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6912 IPA_CMD_ASS_ENABLE,
6913 SETASS_DATA_SIZEOF(caps), prot);
6914 if (!iob) {
6915 qeth_set_tso_off(card, prot);
6916 return -ENOMEM;
6917 }
6918
6919 /* enable TSO capability */
6920 __ipa_cmd(iob)->data.setassparms.data.caps.enabled =
6921 QETH_IPA_LARGE_SEND_TCP;
6922 rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6923 if (rc) {
6924 qeth_set_tso_off(card, prot);
6925 return rc;
6926 }
6927
6928 if (!qeth_ipa_caps_supported(&caps, QETH_IPA_LARGE_SEND_TCP) ||
6929 !qeth_ipa_caps_enabled(&caps, QETH_IPA_LARGE_SEND_TCP)) {
6930 qeth_set_tso_off(card, prot);
6931 return -EOPNOTSUPP;
6932 }
6933
6934 dev_info(&card->gdev->dev, "TSOv%u enabled (MSS: %u)\n", prot,
6935 tso_data.mss);
6936 return 0;
6937 }
6938
6939 static int qeth_set_ipa_tso(struct qeth_card *card, bool on,
6940 enum qeth_prot_versions prot)
6941 {
6942 return on ? qeth_set_tso_on(card, prot) : qeth_set_tso_off(card, prot);
6943 }
6944
6945 static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on)
6946 {
6947 int rc_ipv4 = (on) ? -EOPNOTSUPP : 0;
6948 int rc_ipv6;
6949
6950 if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
6951 rc_ipv4 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6952 QETH_PROT_IPV4, NULL);
6953 if (!qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6954 /* no/one Offload Assist available, so the rc is trivial */
6955 return rc_ipv4;
6956
6957 rc_ipv6 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6958 QETH_PROT_IPV6, NULL);
6959
6960 if (on)
6961 /* enable: success if any Assist is active */
6962 return (rc_ipv6) ? rc_ipv4 : 0;
6963
6964 /* disable: failure if any Assist is still active */
6965 return (rc_ipv6) ? rc_ipv6 : rc_ipv4;
6966 }
6967
6968 /**
6969 * qeth_enable_hw_features() - (Re-)Enable HW functions for device features
6970 * @dev: a net_device
6971 */
6972 void qeth_enable_hw_features(struct net_device *dev)
6973 {
6974 struct qeth_card *card = dev->ml_priv;
6975 netdev_features_t features;
6976
6977 features = dev->features;
6978 /* force-off any feature that might need an IPA sequence.
6979 * netdev_update_features() will restart them.
6980 */
6981 dev->features &= ~dev->hw_features;
6982 /* toggle VLAN filter, so that VIDs are re-programmed: */
6983 if (IS_LAYER2(card) && IS_VM_NIC(card)) {
6984 dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
6985 dev->wanted_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
6986 }
6987 netdev_update_features(dev);
6988 if (features != dev->features)
6989 dev_warn(&card->gdev->dev,
6990 "Device recovery failed to restore all offload features\n");
6991 }
6992 EXPORT_SYMBOL_GPL(qeth_enable_hw_features);
6993
6994 static void qeth_check_restricted_features(struct qeth_card *card,
6995 netdev_features_t changed,
6996 netdev_features_t actual)
6997 {
6998 netdev_features_t ipv6_features = NETIF_F_TSO6;
6999 netdev_features_t ipv4_features = NETIF_F_TSO;
7000
7001 if (!card->info.has_lp2lp_cso_v6)
7002 ipv6_features |= NETIF_F_IPV6_CSUM;
7003 if (!card->info.has_lp2lp_cso_v4)
7004 ipv4_features |= NETIF_F_IP_CSUM;
7005
7006 if ((changed & ipv6_features) && !(actual & ipv6_features))
7007 qeth_flush_local_addrs6(card);
7008 if ((changed & ipv4_features) && !(actual & ipv4_features))
7009 qeth_flush_local_addrs4(card);
7010 }
7011
7012 int qeth_set_features(struct net_device *dev, netdev_features_t features)
7013 {
7014 struct qeth_card *card = dev->ml_priv;
7015 netdev_features_t changed = dev->features ^ features;
7016 int rc = 0;
7017
7018 QETH_CARD_TEXT(card, 2, "setfeat");
7019 QETH_CARD_HEX(card, 2, &features, sizeof(features));
7020
7021 if ((changed & NETIF_F_IP_CSUM)) {
7022 rc = qeth_set_ipa_csum(card, features & NETIF_F_IP_CSUM,
7023 IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV4,
7024 &card->info.has_lp2lp_cso_v4);
7025 if (rc)
7026 changed ^= NETIF_F_IP_CSUM;
7027 }
7028 if (changed & NETIF_F_IPV6_CSUM) {
7029 rc = qeth_set_ipa_csum(card, features & NETIF_F_IPV6_CSUM,
7030 IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV6,
7031 &card->info.has_lp2lp_cso_v6);
7032 if (rc)
7033 changed ^= NETIF_F_IPV6_CSUM;
7034 }
7035 if (changed & NETIF_F_RXCSUM) {
7036 rc = qeth_set_ipa_rx_csum(card, features & NETIF_F_RXCSUM);
7037 if (rc)
7038 changed ^= NETIF_F_RXCSUM;
7039 }
7040 if (changed & NETIF_F_TSO) {
7041 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO,
7042 QETH_PROT_IPV4);
7043 if (rc)
7044 changed ^= NETIF_F_TSO;
7045 }
7046 if (changed & NETIF_F_TSO6) {
7047 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO6,
7048 QETH_PROT_IPV6);
7049 if (rc)
7050 changed ^= NETIF_F_TSO6;
7051 }
7052
7053 qeth_check_restricted_features(card, dev->features ^ features,
7054 dev->features ^ changed);
7055
7056 /* everything changed successfully? */
7057 if ((dev->features ^ features) == changed)
7058 return 0;
7059 /* something went wrong. save changed features and return error */
7060 dev->features ^= changed;
7061 return -EIO;
7062 }
7063 EXPORT_SYMBOL_GPL(qeth_set_features);
7064
7065 netdev_features_t qeth_fix_features(struct net_device *dev,
7066 netdev_features_t features)
7067 {
7068 struct qeth_card *card = dev->ml_priv;
7069
7070 QETH_CARD_TEXT(card, 2, "fixfeat");
7071 if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
7072 features &= ~NETIF_F_IP_CSUM;
7073 if (!qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6))
7074 features &= ~NETIF_F_IPV6_CSUM;
7075 if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM) &&
7076 !qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
7077 features &= ~NETIF_F_RXCSUM;
7078 if (!qeth_is_supported(card, IPA_OUTBOUND_TSO))
7079 features &= ~NETIF_F_TSO;
7080 if (!qeth_is_supported6(card, IPA_OUTBOUND_TSO))
7081 features &= ~NETIF_F_TSO6;
7082
7083 QETH_CARD_HEX(card, 2, &features, sizeof(features));
7084 return features;
7085 }
7086 EXPORT_SYMBOL_GPL(qeth_fix_features);
7087
7088 netdev_features_t qeth_features_check(struct sk_buff *skb,
7089 struct net_device *dev,
7090 netdev_features_t features)
7091 {
7092 struct qeth_card *card = dev->ml_priv;
7093
7094 /* Traffic with local next-hop is not eligible for some offloads: */
7095 if (skb->ip_summed == CHECKSUM_PARTIAL &&
7096 READ_ONCE(card->options.isolation) != ISOLATION_MODE_FWD) {
7097 netdev_features_t restricted = 0;
7098
7099 if (skb_is_gso(skb) && !netif_needs_gso(skb, features))
7100 restricted |= NETIF_F_ALL_TSO;
7101
7102 switch (vlan_get_protocol(skb)) {
7103 case htons(ETH_P_IP):
7104 if (!card->info.has_lp2lp_cso_v4)
7105 restricted |= NETIF_F_IP_CSUM;
7106
7107 if (restricted && qeth_next_hop_is_local_v4(card, skb))
7108 features &= ~restricted;
7109 break;
7110 case htons(ETH_P_IPV6):
7111 if (!card->info.has_lp2lp_cso_v6)
7112 restricted |= NETIF_F_IPV6_CSUM;
7113
7114 if (restricted && qeth_next_hop_is_local_v6(card, skb))
7115 features &= ~restricted;
7116 break;
7117 default:
7118 break;
7119 }
7120 }
7121
7122 /* GSO segmentation builds skbs with
7123 * a (small) linear part for the headers, and
7124 * page frags for the data.
7125 * Compared to a linear skb, the header-only part consumes an
7126 * additional buffer element. This reduces buffer utilization, and
7127 * hurts throughput. So compress small segments into one element.
7128 */
7129 if (netif_needs_gso(skb, features)) {
7130 /* match skb_segment(): */
7131 unsigned int doffset = skb->data - skb_mac_header(skb);
7132 unsigned int hsize = skb_shinfo(skb)->gso_size;
7133 unsigned int hroom = skb_headroom(skb);
7134
7135 /* linearize only if resulting skb allocations are order-0: */
7136 if (SKB_DATA_ALIGN(hroom + doffset + hsize) <= SKB_MAX_HEAD(0))
7137 features &= ~NETIF_F_SG;
7138 }
7139
7140 return vlan_features_check(skb, features);
7141 }
7142 EXPORT_SYMBOL_GPL(qeth_features_check);
7143
7144 void qeth_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
7145 {
7146 struct qeth_card *card = dev->ml_priv;
7147 struct qeth_qdio_out_q *queue;
7148 unsigned int i;
7149
7150 QETH_CARD_TEXT(card, 5, "getstat");
7151
7152 stats->rx_packets = card->stats.rx_packets;
7153 stats->rx_bytes = card->stats.rx_bytes;
7154 stats->rx_errors = card->stats.rx_length_errors +
7155 card->stats.rx_frame_errors +
7156 card->stats.rx_fifo_errors;
7157 stats->rx_dropped = card->stats.rx_dropped_nomem +
7158 card->stats.rx_dropped_notsupp +
7159 card->stats.rx_dropped_runt;
7160 stats->multicast = card->stats.rx_multicast;
7161 stats->rx_length_errors = card->stats.rx_length_errors;
7162 stats->rx_frame_errors = card->stats.rx_frame_errors;
7163 stats->rx_fifo_errors = card->stats.rx_fifo_errors;
7164
7165 for (i = 0; i < card->qdio.no_out_queues; i++) {
7166 queue = card->qdio.out_qs[i];
7167
7168 stats->tx_packets += queue->stats.tx_packets;
7169 stats->tx_bytes += queue->stats.tx_bytes;
7170 stats->tx_errors += queue->stats.tx_errors;
7171 stats->tx_dropped += queue->stats.tx_dropped;
7172 }
7173 }
7174 EXPORT_SYMBOL_GPL(qeth_get_stats64);
7175
7176 #define TC_IQD_UCAST 0
7177 static void qeth_iqd_set_prio_tc_map(struct net_device *dev,
7178 unsigned int ucast_txqs)
7179 {
7180 unsigned int prio;
7181
7182 /* IQD requires mcast traffic to be placed on a dedicated queue, and
7183 * qeth_iqd_select_queue() deals with this.
7184 * For unicast traffic, we defer the queue selection to the stack.
7185 * By installing a trivial prio map that spans over only the unicast
7186 * queues, we can encourage the stack to spread the ucast traffic evenly
7187 * without selecting the mcast queue.
7188 */
7189
7190 /* One traffic class, spanning over all active ucast queues: */
7191 netdev_set_num_tc(dev, 1);
7192 netdev_set_tc_queue(dev, TC_IQD_UCAST, ucast_txqs,
7193 QETH_IQD_MIN_UCAST_TXQ);
7194
7195 /* Map all priorities to this traffic class: */
7196 for (prio = 0; prio <= TC_BITMASK; prio++)
7197 netdev_set_prio_tc_map(dev, prio, TC_IQD_UCAST);
7198 }
7199
7200 int qeth_set_real_num_tx_queues(struct qeth_card *card, unsigned int count)
7201 {
7202 struct net_device *dev = card->dev;
7203 int rc;
7204
7205 /* Per netif_setup_tc(), adjust the mapping first: */
7206 if (IS_IQD(card))
7207 qeth_iqd_set_prio_tc_map(dev, count - 1);
7208
7209 rc = netif_set_real_num_tx_queues(dev, count);
7210
7211 if (rc && IS_IQD(card))
7212 qeth_iqd_set_prio_tc_map(dev, dev->real_num_tx_queues - 1);
7213
7214 return rc;
7215 }
7216 EXPORT_SYMBOL_GPL(qeth_set_real_num_tx_queues);
7217
7218 u16 qeth_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
7219 u8 cast_type, struct net_device *sb_dev)
7220 {
7221 u16 txq;
7222
7223 if (cast_type != RTN_UNICAST)
7224 return QETH_IQD_MCAST_TXQ;
7225 if (dev->real_num_tx_queues == QETH_IQD_MIN_TXQ)
7226 return QETH_IQD_MIN_UCAST_TXQ;
7227
7228 txq = netdev_pick_tx(dev, skb, sb_dev);
7229 return (txq == QETH_IQD_MCAST_TXQ) ? QETH_IQD_MIN_UCAST_TXQ : txq;
7230 }
7231 EXPORT_SYMBOL_GPL(qeth_iqd_select_queue);
7232
7233 int qeth_open(struct net_device *dev)
7234 {
7235 struct qeth_card *card = dev->ml_priv;
7236
7237 QETH_CARD_TEXT(card, 4, "qethopen");
7238
7239 card->data.state = CH_STATE_UP;
7240 netif_tx_start_all_queues(dev);
7241
7242 napi_enable(&card->napi);
7243 local_bh_disable();
7244 napi_schedule(&card->napi);
7245 if (IS_IQD(card)) {
7246 struct qeth_qdio_out_q *queue;
7247 unsigned int i;
7248
7249 qeth_for_each_output_queue(card, queue, i) {
7250 netif_tx_napi_add(dev, &queue->napi, qeth_tx_poll,
7251 QETH_NAPI_WEIGHT);
7252 napi_enable(&queue->napi);
7253 napi_schedule(&queue->napi);
7254 }
7255 }
7256 /* kick-start the NAPI softirq: */
7257 local_bh_enable();
7258 return 0;
7259 }
7260 EXPORT_SYMBOL_GPL(qeth_open);
7261
7262 int qeth_stop(struct net_device *dev)
7263 {
7264 struct qeth_card *card = dev->ml_priv;
7265
7266 QETH_CARD_TEXT(card, 4, "qethstop");
7267 if (IS_IQD(card)) {
7268 struct qeth_qdio_out_q *queue;
7269 unsigned int i;
7270
7271 /* Quiesce the NAPI instances: */
7272 qeth_for_each_output_queue(card, queue, i)
7273 napi_disable(&queue->napi);
7274
7275 /* Stop .ndo_start_xmit, might still access queue->napi. */
7276 netif_tx_disable(dev);
7277
7278 qeth_for_each_output_queue(card, queue, i) {
7279 del_timer_sync(&queue->timer);
7280 /* Queues may get re-allocated, so remove the NAPIs. */
7281 netif_napi_del(&queue->napi);
7282 }
7283 } else {
7284 netif_tx_disable(dev);
7285 }
7286
7287 napi_disable(&card->napi);
7288 cancel_delayed_work_sync(&card->buffer_reclaim_work);
7289 qdio_stop_irq(CARD_DDEV(card));
7290
7291 return 0;
7292 }
7293 EXPORT_SYMBOL_GPL(qeth_stop);
7294
7295 static int __init qeth_core_init(void)
7296 {
7297 int rc;
7298
7299 pr_info("loading core functions\n");
7300
7301 qeth_debugfs_root = debugfs_create_dir("qeth", NULL);
7302
7303 rc = qeth_register_dbf_views();
7304 if (rc)
7305 goto dbf_err;
7306 qeth_core_root_dev = root_device_register("qeth");
7307 rc = PTR_ERR_OR_ZERO(qeth_core_root_dev);
7308 if (rc)
7309 goto register_err;
7310 qeth_core_header_cache =
7311 kmem_cache_create("qeth_hdr", QETH_HDR_CACHE_OBJ_SIZE,
7312 roundup_pow_of_two(QETH_HDR_CACHE_OBJ_SIZE),
7313 0, NULL);
7314 if (!qeth_core_header_cache) {
7315 rc = -ENOMEM;
7316 goto slab_err;
7317 }
7318 qeth_qdio_outbuf_cache = kmem_cache_create("qeth_buf",
7319 sizeof(struct qeth_qdio_out_buffer), 0, 0, NULL);
7320 if (!qeth_qdio_outbuf_cache) {
7321 rc = -ENOMEM;
7322 goto cqslab_err;
7323 }
7324 rc = ccw_driver_register(&qeth_ccw_driver);
7325 if (rc)
7326 goto ccw_err;
7327 rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver);
7328 if (rc)
7329 goto ccwgroup_err;
7330
7331 return 0;
7332
7333 ccwgroup_err:
7334 ccw_driver_unregister(&qeth_ccw_driver);
7335 ccw_err:
7336 kmem_cache_destroy(qeth_qdio_outbuf_cache);
7337 cqslab_err:
7338 kmem_cache_destroy(qeth_core_header_cache);
7339 slab_err:
7340 root_device_unregister(qeth_core_root_dev);
7341 register_err:
7342 qeth_unregister_dbf_views();
7343 dbf_err:
7344 debugfs_remove_recursive(qeth_debugfs_root);
7345 pr_err("Initializing the qeth device driver failed\n");
7346 return rc;
7347 }
7348
7349 static void __exit qeth_core_exit(void)
7350 {
7351 qeth_clear_dbf_list();
7352 ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver);
7353 ccw_driver_unregister(&qeth_ccw_driver);
7354 kmem_cache_destroy(qeth_qdio_outbuf_cache);
7355 kmem_cache_destroy(qeth_core_header_cache);
7356 root_device_unregister(qeth_core_root_dev);
7357 qeth_unregister_dbf_views();
7358 debugfs_remove_recursive(qeth_debugfs_root);
7359 pr_info("core functions removed\n");
7360 }
7361
7362 module_init(qeth_core_init);
7363 module_exit(qeth_core_exit);
7364 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
7365 MODULE_DESCRIPTION("qeth core functions");
7366 MODULE_LICENSE("GPL");
Linux with added FPC-III support