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[thirdparty/kernel/stable.git] / drivers / s390 / net / qeth_core_main.c
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright IBM Corp. 2007, 2009
4 * Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
5 * Frank Pavlic <fpavlic@de.ibm.com>,
6 * Thomas Spatzier <tspat@de.ibm.com>,
7 * Frank Blaschka <frank.blaschka@de.ibm.com>
8 */
9
10 #define KMSG_COMPONENT "qeth"
11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
12
13 #include <linux/compat.h>
14 #include <linux/module.h>
15 #include <linux/moduleparam.h>
16 #include <linux/string.h>
17 #include <linux/errno.h>
18 #include <linux/kernel.h>
19 #include <linux/log2.h>
20 #include <linux/io.h>
21 #include <linux/ip.h>
22 #include <linux/tcp.h>
23 #include <linux/mii.h>
24 #include <linux/mm.h>
25 #include <linux/kthread.h>
26 #include <linux/slab.h>
27 #include <linux/if_vlan.h>
28 #include <linux/netdevice.h>
29 #include <linux/netdev_features.h>
30 #include <linux/rcutree.h>
31 #include <linux/skbuff.h>
32 #include <linux/vmalloc.h>
33
34 #include <net/iucv/af_iucv.h>
35 #include <net/dsfield.h>
36 #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 static struct kmem_cache *qeth_core_header_cache;
61 static struct kmem_cache *qeth_qdio_outbuf_cache;
62 static struct kmem_cache *qeth_qaob_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
74 static const char *qeth_get_cardname(struct qeth_card *card)
75 {
76 if (IS_VM_NIC(card)) {
77 switch (card->info.type) {
78 case QETH_CARD_TYPE_OSD:
79 return " Virtual NIC QDIO";
80 case QETH_CARD_TYPE_IQD:
81 return " Virtual NIC Hiper";
82 case QETH_CARD_TYPE_OSM:
83 return " Virtual NIC QDIO - OSM";
84 case QETH_CARD_TYPE_OSX:
85 return " Virtual NIC QDIO - OSX";
86 default:
87 return " unknown";
88 }
89 } else {
90 switch (card->info.type) {
91 case QETH_CARD_TYPE_OSD:
92 return " OSD Express";
93 case QETH_CARD_TYPE_IQD:
94 return " HiperSockets";
95 case QETH_CARD_TYPE_OSM:
96 return " OSM QDIO";
97 case QETH_CARD_TYPE_OSX:
98 return " OSX QDIO";
99 default:
100 return " unknown";
101 }
102 }
103 return " n/a";
104 }
105
106 /* max length to be returned: 14 */
107 const char *qeth_get_cardname_short(struct qeth_card *card)
108 {
109 if (IS_VM_NIC(card)) {
110 switch (card->info.type) {
111 case QETH_CARD_TYPE_OSD:
112 return "Virt.NIC QDIO";
113 case QETH_CARD_TYPE_IQD:
114 return "Virt.NIC Hiper";
115 case QETH_CARD_TYPE_OSM:
116 return "Virt.NIC OSM";
117 case QETH_CARD_TYPE_OSX:
118 return "Virt.NIC OSX";
119 default:
120 return "unknown";
121 }
122 } else {
123 switch (card->info.type) {
124 case QETH_CARD_TYPE_OSD:
125 switch (card->info.link_type) {
126 case QETH_LINK_TYPE_FAST_ETH:
127 return "OSD_100";
128 case QETH_LINK_TYPE_HSTR:
129 return "HSTR";
130 case QETH_LINK_TYPE_GBIT_ETH:
131 return "OSD_1000";
132 case QETH_LINK_TYPE_10GBIT_ETH:
133 return "OSD_10GIG";
134 case QETH_LINK_TYPE_25GBIT_ETH:
135 return "OSD_25GIG";
136 case QETH_LINK_TYPE_LANE_ETH100:
137 return "OSD_FE_LANE";
138 case QETH_LINK_TYPE_LANE_TR:
139 return "OSD_TR_LANE";
140 case QETH_LINK_TYPE_LANE_ETH1000:
141 return "OSD_GbE_LANE";
142 case QETH_LINK_TYPE_LANE:
143 return "OSD_ATM_LANE";
144 default:
145 return "OSD_Express";
146 }
147 case QETH_CARD_TYPE_IQD:
148 return "HiperSockets";
149 case QETH_CARD_TYPE_OSM:
150 return "OSM_1000";
151 case QETH_CARD_TYPE_OSX:
152 return "OSX_10GIG";
153 default:
154 return "unknown";
155 }
156 }
157 return "n/a";
158 }
159
160 void qeth_set_allowed_threads(struct qeth_card *card, unsigned long threads,
161 int clear_start_mask)
162 {
163 unsigned long flags;
164
165 spin_lock_irqsave(&card->thread_mask_lock, flags);
166 card->thread_allowed_mask = threads;
167 if (clear_start_mask)
168 card->thread_start_mask &= threads;
169 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
170 wake_up(&card->wait_q);
171 }
172 EXPORT_SYMBOL_GPL(qeth_set_allowed_threads);
173
174 int qeth_threads_running(struct qeth_card *card, unsigned long threads)
175 {
176 unsigned long flags;
177 int rc = 0;
178
179 spin_lock_irqsave(&card->thread_mask_lock, flags);
180 rc = (card->thread_running_mask & threads);
181 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
182 return rc;
183 }
184 EXPORT_SYMBOL_GPL(qeth_threads_running);
185
186 static void qeth_clear_working_pool_list(struct qeth_card *card)
187 {
188 struct qeth_buffer_pool_entry *pool_entry, *tmp;
189 struct qeth_qdio_q *queue = card->qdio.in_q;
190 unsigned int i;
191
192 QETH_CARD_TEXT(card, 5, "clwrklst");
193 list_for_each_entry_safe(pool_entry, tmp,
194 &card->qdio.in_buf_pool.entry_list, list)
195 list_del(&pool_entry->list);
196
197 for (i = 0; i < ARRAY_SIZE(queue->bufs); i++)
198 queue->bufs[i].pool_entry = NULL;
199 }
200
201 static void qeth_free_pool_entry(struct qeth_buffer_pool_entry *entry)
202 {
203 unsigned int i;
204
205 for (i = 0; i < ARRAY_SIZE(entry->elements); i++) {
206 if (entry->elements[i])
207 __free_page(entry->elements[i]);
208 }
209
210 kfree(entry);
211 }
212
213 static void qeth_free_buffer_pool(struct qeth_card *card)
214 {
215 struct qeth_buffer_pool_entry *entry, *tmp;
216
217 list_for_each_entry_safe(entry, tmp, &card->qdio.init_pool.entry_list,
218 init_list) {
219 list_del(&entry->init_list);
220 qeth_free_pool_entry(entry);
221 }
222 }
223
224 static struct qeth_buffer_pool_entry *qeth_alloc_pool_entry(unsigned int pages)
225 {
226 struct qeth_buffer_pool_entry *entry;
227 unsigned int i;
228
229 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
230 if (!entry)
231 return NULL;
232
233 for (i = 0; i < pages; i++) {
234 entry->elements[i] = __dev_alloc_page(GFP_KERNEL);
235
236 if (!entry->elements[i]) {
237 qeth_free_pool_entry(entry);
238 return NULL;
239 }
240 }
241
242 return entry;
243 }
244
245 static int qeth_alloc_buffer_pool(struct qeth_card *card)
246 {
247 unsigned int buf_elements = QETH_MAX_BUFFER_ELEMENTS(card);
248 unsigned int i;
249
250 QETH_CARD_TEXT(card, 5, "alocpool");
251 for (i = 0; i < card->qdio.init_pool.buf_count; ++i) {
252 struct qeth_buffer_pool_entry *entry;
253
254 entry = qeth_alloc_pool_entry(buf_elements);
255 if (!entry) {
256 qeth_free_buffer_pool(card);
257 return -ENOMEM;
258 }
259
260 list_add(&entry->init_list, &card->qdio.init_pool.entry_list);
261 }
262 return 0;
263 }
264
265 int qeth_resize_buffer_pool(struct qeth_card *card, unsigned int count)
266 {
267 unsigned int buf_elements = QETH_MAX_BUFFER_ELEMENTS(card);
268 struct qeth_qdio_buffer_pool *pool = &card->qdio.init_pool;
269 struct qeth_buffer_pool_entry *entry, *tmp;
270 int delta = count - pool->buf_count;
271 LIST_HEAD(entries);
272
273 QETH_CARD_TEXT(card, 2, "realcbp");
274
275 /* Defer until pool is allocated: */
276 if (list_empty(&pool->entry_list))
277 goto out;
278
279 /* Remove entries from the pool: */
280 while (delta < 0) {
281 entry = list_first_entry(&pool->entry_list,
282 struct qeth_buffer_pool_entry,
283 init_list);
284 list_del(&entry->init_list);
285 qeth_free_pool_entry(entry);
286
287 delta++;
288 }
289
290 /* Allocate additional entries: */
291 while (delta > 0) {
292 entry = qeth_alloc_pool_entry(buf_elements);
293 if (!entry) {
294 list_for_each_entry_safe(entry, tmp, &entries,
295 init_list) {
296 list_del(&entry->init_list);
297 qeth_free_pool_entry(entry);
298 }
299
300 return -ENOMEM;
301 }
302
303 list_add(&entry->init_list, &entries);
304
305 delta--;
306 }
307
308 list_splice(&entries, &pool->entry_list);
309
310 out:
311 card->qdio.in_buf_pool.buf_count = count;
312 pool->buf_count = count;
313 return 0;
314 }
315 EXPORT_SYMBOL_GPL(qeth_resize_buffer_pool);
316
317 static void qeth_free_qdio_queue(struct qeth_qdio_q *q)
318 {
319 if (!q)
320 return;
321
322 qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
323 kfree(q);
324 }
325
326 static struct qeth_qdio_q *qeth_alloc_qdio_queue(void)
327 {
328 struct qeth_qdio_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
329 int i;
330
331 if (!q)
332 return NULL;
333
334 if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
335 kfree(q);
336 return NULL;
337 }
338
339 for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i)
340 q->bufs[i].buffer = q->qdio_bufs[i];
341
342 QETH_DBF_HEX(SETUP, 2, &q, sizeof(void *));
343 return q;
344 }
345
346 static int qeth_cq_init(struct qeth_card *card)
347 {
348 int rc;
349
350 if (card->options.cq == QETH_CQ_ENABLED) {
351 QETH_CARD_TEXT(card, 2, "cqinit");
352 qdio_reset_buffers(card->qdio.c_q->qdio_bufs,
353 QDIO_MAX_BUFFERS_PER_Q);
354 card->qdio.c_q->next_buf_to_init = 127;
355 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 1, 0, 127,
356 NULL);
357 if (rc) {
358 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
359 goto out;
360 }
361 }
362 rc = 0;
363 out:
364 return rc;
365 }
366
367 static int qeth_alloc_cq(struct qeth_card *card)
368 {
369 if (card->options.cq == QETH_CQ_ENABLED) {
370 QETH_CARD_TEXT(card, 2, "cqon");
371 card->qdio.c_q = qeth_alloc_qdio_queue();
372 if (!card->qdio.c_q) {
373 dev_err(&card->gdev->dev, "Failed to create completion queue\n");
374 return -ENOMEM;
375 }
376 } else {
377 QETH_CARD_TEXT(card, 2, "nocq");
378 card->qdio.c_q = NULL;
379 }
380 return 0;
381 }
382
383 static void qeth_free_cq(struct qeth_card *card)
384 {
385 if (card->qdio.c_q) {
386 qeth_free_qdio_queue(card->qdio.c_q);
387 card->qdio.c_q = NULL;
388 }
389 }
390
391 static enum iucv_tx_notify qeth_compute_cq_notification(int sbalf15,
392 int delayed)
393 {
394 enum iucv_tx_notify n;
395
396 switch (sbalf15) {
397 case 0:
398 n = delayed ? TX_NOTIFY_DELAYED_OK : TX_NOTIFY_OK;
399 break;
400 case 4:
401 case 16:
402 case 17:
403 case 18:
404 n = delayed ? TX_NOTIFY_DELAYED_UNREACHABLE :
405 TX_NOTIFY_UNREACHABLE;
406 break;
407 default:
408 n = delayed ? TX_NOTIFY_DELAYED_GENERALERROR :
409 TX_NOTIFY_GENERALERROR;
410 break;
411 }
412
413 return n;
414 }
415
416 static void qeth_put_cmd(struct qeth_cmd_buffer *iob)
417 {
418 if (refcount_dec_and_test(&iob->ref_count)) {
419 kfree(iob->data);
420 kfree(iob);
421 }
422 }
423 static void qeth_setup_ccw(struct ccw1 *ccw, u8 cmd_code, u8 flags, u32 len,
424 void *data)
425 {
426 ccw->cmd_code = cmd_code;
427 ccw->flags = flags | CCW_FLAG_SLI;
428 ccw->count = len;
429 ccw->cda = (__u32) __pa(data);
430 }
431
432 static int __qeth_issue_next_read(struct qeth_card *card)
433 {
434 struct qeth_cmd_buffer *iob = card->read_cmd;
435 struct qeth_channel *channel = iob->channel;
436 struct ccw1 *ccw = __ccw_from_cmd(iob);
437 int rc;
438
439 QETH_CARD_TEXT(card, 5, "issnxrd");
440 if (channel->state != CH_STATE_UP)
441 return -EIO;
442
443 memset(iob->data, 0, iob->length);
444 qeth_setup_ccw(ccw, CCW_CMD_READ, 0, iob->length, iob->data);
445 iob->callback = qeth_issue_next_read_cb;
446 /* keep the cmd alive after completion: */
447 qeth_get_cmd(iob);
448
449 QETH_CARD_TEXT(card, 6, "noirqpnd");
450 rc = ccw_device_start(channel->ccwdev, ccw, (addr_t) iob, 0, 0);
451 if (!rc) {
452 channel->active_cmd = iob;
453 } else {
454 QETH_DBF_MESSAGE(2, "error %i on device %x when starting next read ccw!\n",
455 rc, CARD_DEVID(card));
456 qeth_unlock_channel(card, channel);
457 qeth_put_cmd(iob);
458 card->read_or_write_problem = 1;
459 qeth_schedule_recovery(card);
460 }
461 return rc;
462 }
463
464 static int qeth_issue_next_read(struct qeth_card *card)
465 {
466 int ret;
467
468 spin_lock_irq(get_ccwdev_lock(CARD_RDEV(card)));
469 ret = __qeth_issue_next_read(card);
470 spin_unlock_irq(get_ccwdev_lock(CARD_RDEV(card)));
471
472 return ret;
473 }
474
475 static void qeth_enqueue_cmd(struct qeth_card *card,
476 struct qeth_cmd_buffer *iob)
477 {
478 spin_lock_irq(&card->lock);
479 list_add_tail(&iob->list_entry, &card->cmd_waiter_list);
480 spin_unlock_irq(&card->lock);
481 }
482
483 static void qeth_dequeue_cmd(struct qeth_card *card,
484 struct qeth_cmd_buffer *iob)
485 {
486 spin_lock_irq(&card->lock);
487 list_del(&iob->list_entry);
488 spin_unlock_irq(&card->lock);
489 }
490
491 static void qeth_notify_cmd(struct qeth_cmd_buffer *iob, int reason)
492 {
493 iob->rc = reason;
494 complete(&iob->done);
495 }
496
497 static void qeth_flush_local_addrs4(struct qeth_card *card)
498 {
499 struct qeth_local_addr *addr;
500 struct hlist_node *tmp;
501 unsigned int i;
502
503 spin_lock_irq(&card->local_addrs4_lock);
504 hash_for_each_safe(card->local_addrs4, i, tmp, addr, hnode) {
505 hash_del_rcu(&addr->hnode);
506 kfree_rcu(addr, rcu);
507 }
508 spin_unlock_irq(&card->local_addrs4_lock);
509 }
510
511 static void qeth_flush_local_addrs6(struct qeth_card *card)
512 {
513 struct qeth_local_addr *addr;
514 struct hlist_node *tmp;
515 unsigned int i;
516
517 spin_lock_irq(&card->local_addrs6_lock);
518 hash_for_each_safe(card->local_addrs6, i, tmp, addr, hnode) {
519 hash_del_rcu(&addr->hnode);
520 kfree_rcu(addr, rcu);
521 }
522 spin_unlock_irq(&card->local_addrs6_lock);
523 }
524
525 static void qeth_flush_local_addrs(struct qeth_card *card)
526 {
527 qeth_flush_local_addrs4(card);
528 qeth_flush_local_addrs6(card);
529 }
530
531 static void qeth_add_local_addrs4(struct qeth_card *card,
532 struct qeth_ipacmd_local_addrs4 *cmd)
533 {
534 unsigned int i;
535
536 if (cmd->addr_length !=
537 sizeof_field(struct qeth_ipacmd_local_addr4, addr)) {
538 dev_err_ratelimited(&card->gdev->dev,
539 "Dropped IPv4 ADD LOCAL ADDR event with bad length %u\n",
540 cmd->addr_length);
541 return;
542 }
543
544 spin_lock(&card->local_addrs4_lock);
545 for (i = 0; i < cmd->count; i++) {
546 unsigned int key = ipv4_addr_hash(cmd->addrs[i].addr);
547 struct qeth_local_addr *addr;
548 bool duplicate = false;
549
550 hash_for_each_possible(card->local_addrs4, addr, hnode, key) {
551 if (addr->addr.s6_addr32[3] == cmd->addrs[i].addr) {
552 duplicate = true;
553 break;
554 }
555 }
556
557 if (duplicate)
558 continue;
559
560 addr = kmalloc(sizeof(*addr), GFP_ATOMIC);
561 if (!addr) {
562 dev_err(&card->gdev->dev,
563 "Failed to allocate local addr object. Traffic to %pI4 might suffer.\n",
564 &cmd->addrs[i].addr);
565 continue;
566 }
567
568 ipv6_addr_set(&addr->addr, 0, 0, 0, cmd->addrs[i].addr);
569 hash_add_rcu(card->local_addrs4, &addr->hnode, key);
570 }
571 spin_unlock(&card->local_addrs4_lock);
572 }
573
574 static void qeth_add_local_addrs6(struct qeth_card *card,
575 struct qeth_ipacmd_local_addrs6 *cmd)
576 {
577 unsigned int i;
578
579 if (cmd->addr_length !=
580 sizeof_field(struct qeth_ipacmd_local_addr6, addr)) {
581 dev_err_ratelimited(&card->gdev->dev,
582 "Dropped IPv6 ADD LOCAL ADDR event with bad length %u\n",
583 cmd->addr_length);
584 return;
585 }
586
587 spin_lock(&card->local_addrs6_lock);
588 for (i = 0; i < cmd->count; i++) {
589 u32 key = ipv6_addr_hash(&cmd->addrs[i].addr);
590 struct qeth_local_addr *addr;
591 bool duplicate = false;
592
593 hash_for_each_possible(card->local_addrs6, addr, hnode, key) {
594 if (ipv6_addr_equal(&addr->addr, &cmd->addrs[i].addr)) {
595 duplicate = true;
596 break;
597 }
598 }
599
600 if (duplicate)
601 continue;
602
603 addr = kmalloc(sizeof(*addr), GFP_ATOMIC);
604 if (!addr) {
605 dev_err(&card->gdev->dev,
606 "Failed to allocate local addr object. Traffic to %pI6c might suffer.\n",
607 &cmd->addrs[i].addr);
608 continue;
609 }
610
611 addr->addr = cmd->addrs[i].addr;
612 hash_add_rcu(card->local_addrs6, &addr->hnode, key);
613 }
614 spin_unlock(&card->local_addrs6_lock);
615 }
616
617 static void qeth_del_local_addrs4(struct qeth_card *card,
618 struct qeth_ipacmd_local_addrs4 *cmd)
619 {
620 unsigned int i;
621
622 if (cmd->addr_length !=
623 sizeof_field(struct qeth_ipacmd_local_addr4, addr)) {
624 dev_err_ratelimited(&card->gdev->dev,
625 "Dropped IPv4 DEL LOCAL ADDR event with bad length %u\n",
626 cmd->addr_length);
627 return;
628 }
629
630 spin_lock(&card->local_addrs4_lock);
631 for (i = 0; i < cmd->count; i++) {
632 struct qeth_ipacmd_local_addr4 *addr = &cmd->addrs[i];
633 unsigned int key = ipv4_addr_hash(addr->addr);
634 struct qeth_local_addr *tmp;
635
636 hash_for_each_possible(card->local_addrs4, tmp, hnode, key) {
637 if (tmp->addr.s6_addr32[3] == addr->addr) {
638 hash_del_rcu(&tmp->hnode);
639 kfree_rcu(tmp, rcu);
640 break;
641 }
642 }
643 }
644 spin_unlock(&card->local_addrs4_lock);
645 }
646
647 static void qeth_del_local_addrs6(struct qeth_card *card,
648 struct qeth_ipacmd_local_addrs6 *cmd)
649 {
650 unsigned int i;
651
652 if (cmd->addr_length !=
653 sizeof_field(struct qeth_ipacmd_local_addr6, addr)) {
654 dev_err_ratelimited(&card->gdev->dev,
655 "Dropped IPv6 DEL LOCAL ADDR event with bad length %u\n",
656 cmd->addr_length);
657 return;
658 }
659
660 spin_lock(&card->local_addrs6_lock);
661 for (i = 0; i < cmd->count; i++) {
662 struct qeth_ipacmd_local_addr6 *addr = &cmd->addrs[i];
663 u32 key = ipv6_addr_hash(&addr->addr);
664 struct qeth_local_addr *tmp;
665
666 hash_for_each_possible(card->local_addrs6, tmp, hnode, key) {
667 if (ipv6_addr_equal(&tmp->addr, &addr->addr)) {
668 hash_del_rcu(&tmp->hnode);
669 kfree_rcu(tmp, rcu);
670 break;
671 }
672 }
673 }
674 spin_unlock(&card->local_addrs6_lock);
675 }
676
677 static bool qeth_next_hop_is_local_v4(struct qeth_card *card,
678 struct sk_buff *skb)
679 {
680 struct qeth_local_addr *tmp;
681 bool is_local = false;
682 unsigned int key;
683 __be32 next_hop;
684
685 if (hash_empty(card->local_addrs4))
686 return false;
687
688 rcu_read_lock();
689 next_hop = qeth_next_hop_v4_rcu(skb,
690 qeth_dst_check_rcu(skb, htons(ETH_P_IP)));
691 key = ipv4_addr_hash(next_hop);
692
693 hash_for_each_possible_rcu(card->local_addrs4, tmp, hnode, key) {
694 if (tmp->addr.s6_addr32[3] == next_hop) {
695 is_local = true;
696 break;
697 }
698 }
699 rcu_read_unlock();
700
701 return is_local;
702 }
703
704 static bool qeth_next_hop_is_local_v6(struct qeth_card *card,
705 struct sk_buff *skb)
706 {
707 struct qeth_local_addr *tmp;
708 struct in6_addr *next_hop;
709 bool is_local = false;
710 u32 key;
711
712 if (hash_empty(card->local_addrs6))
713 return false;
714
715 rcu_read_lock();
716 next_hop = qeth_next_hop_v6_rcu(skb,
717 qeth_dst_check_rcu(skb, htons(ETH_P_IPV6)));
718 key = ipv6_addr_hash(next_hop);
719
720 hash_for_each_possible_rcu(card->local_addrs6, tmp, hnode, key) {
721 if (ipv6_addr_equal(&tmp->addr, next_hop)) {
722 is_local = true;
723 break;
724 }
725 }
726 rcu_read_unlock();
727
728 return is_local;
729 }
730
731 static int qeth_debugfs_local_addr_show(struct seq_file *m, void *v)
732 {
733 struct qeth_card *card = m->private;
734 struct qeth_local_addr *tmp;
735 unsigned int i;
736
737 rcu_read_lock();
738 hash_for_each_rcu(card->local_addrs4, i, tmp, hnode)
739 seq_printf(m, "%pI4\n", &tmp->addr.s6_addr32[3]);
740 hash_for_each_rcu(card->local_addrs6, i, tmp, hnode)
741 seq_printf(m, "%pI6c\n", &tmp->addr);
742 rcu_read_unlock();
743
744 return 0;
745 }
746
747 DEFINE_SHOW_ATTRIBUTE(qeth_debugfs_local_addr);
748
749 static void qeth_issue_ipa_msg(struct qeth_ipa_cmd *cmd, int rc,
750 struct qeth_card *card)
751 {
752 const char *ipa_name;
753 int com = cmd->hdr.command;
754
755 ipa_name = qeth_get_ipa_cmd_name(com);
756
757 if (rc)
758 QETH_DBF_MESSAGE(2, "IPA: %s(%#x) for device %x returned %#x \"%s\"\n",
759 ipa_name, com, CARD_DEVID(card), rc,
760 qeth_get_ipa_msg(rc));
761 else
762 QETH_DBF_MESSAGE(5, "IPA: %s(%#x) for device %x succeeded\n",
763 ipa_name, com, CARD_DEVID(card));
764 }
765
766 static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card,
767 struct qeth_ipa_cmd *cmd)
768 {
769 QETH_CARD_TEXT(card, 5, "chkipad");
770
771 if (IS_IPA_REPLY(cmd)) {
772 if (cmd->hdr.command != IPA_CMD_SET_DIAG_ASS)
773 qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
774 return cmd;
775 }
776
777 /* handle unsolicited event: */
778 switch (cmd->hdr.command) {
779 case IPA_CMD_STOPLAN:
780 if (cmd->hdr.return_code == IPA_RC_VEPA_TO_VEB_TRANSITION) {
781 dev_err(&card->gdev->dev,
782 "Adjacent port of interface %s is no longer in reflective relay mode, trigger recovery\n",
783 netdev_name(card->dev));
784 /* Set offline, then probably fail to set online: */
785 qeth_schedule_recovery(card);
786 } else {
787 /* stay online for subsequent STARTLAN */
788 dev_warn(&card->gdev->dev,
789 "The link for interface %s on CHPID 0x%X failed\n",
790 netdev_name(card->dev), card->info.chpid);
791 qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
792 netif_carrier_off(card->dev);
793 }
794 return NULL;
795 case IPA_CMD_STARTLAN:
796 dev_info(&card->gdev->dev,
797 "The link for %s on CHPID 0x%X has been restored\n",
798 netdev_name(card->dev), card->info.chpid);
799 if (card->info.hwtrap)
800 card->info.hwtrap = 2;
801 qeth_schedule_recovery(card);
802 return NULL;
803 case IPA_CMD_SETBRIDGEPORT_IQD:
804 case IPA_CMD_SETBRIDGEPORT_OSA:
805 case IPA_CMD_ADDRESS_CHANGE_NOTIF:
806 if (card->discipline->control_event_handler(card, cmd))
807 return cmd;
808 return NULL;
809 case IPA_CMD_REGISTER_LOCAL_ADDR:
810 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
811 qeth_add_local_addrs4(card, &cmd->data.local_addrs4);
812 else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
813 qeth_add_local_addrs6(card, &cmd->data.local_addrs6);
814
815 QETH_CARD_TEXT(card, 3, "irla");
816 return NULL;
817 case IPA_CMD_UNREGISTER_LOCAL_ADDR:
818 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
819 qeth_del_local_addrs4(card, &cmd->data.local_addrs4);
820 else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
821 qeth_del_local_addrs6(card, &cmd->data.local_addrs6);
822
823 QETH_CARD_TEXT(card, 3, "urla");
824 return NULL;
825 default:
826 QETH_DBF_MESSAGE(2, "Received data is IPA but not a reply!\n");
827 return cmd;
828 }
829 }
830
831 static void qeth_clear_ipacmd_list(struct qeth_card *card)
832 {
833 struct qeth_cmd_buffer *iob;
834 unsigned long flags;
835
836 QETH_CARD_TEXT(card, 4, "clipalst");
837
838 spin_lock_irqsave(&card->lock, flags);
839 list_for_each_entry(iob, &card->cmd_waiter_list, list_entry)
840 qeth_notify_cmd(iob, -ECANCELED);
841 spin_unlock_irqrestore(&card->lock, flags);
842 }
843
844 static int qeth_check_idx_response(struct qeth_card *card,
845 unsigned char *buffer)
846 {
847 QETH_DBF_HEX(CTRL, 2, buffer, QETH_DBF_CTRL_LEN);
848 if ((buffer[2] & QETH_IDX_TERMINATE_MASK) == QETH_IDX_TERMINATE) {
849 QETH_DBF_MESSAGE(2, "received an IDX TERMINATE with cause code %#04x\n",
850 buffer[4]);
851 QETH_CARD_TEXT(card, 2, "ckidxres");
852 QETH_CARD_TEXT(card, 2, " idxterm");
853 QETH_CARD_TEXT_(card, 2, "rc%x", buffer[4]);
854 if (buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT ||
855 buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT_VM) {
856 dev_err(&card->gdev->dev,
857 "The device does not support the configured transport mode\n");
858 return -EPROTONOSUPPORT;
859 }
860 return -EIO;
861 }
862 return 0;
863 }
864
865 static void qeth_release_buffer_cb(struct qeth_card *card,
866 struct qeth_cmd_buffer *iob,
867 unsigned int data_length)
868 {
869 qeth_put_cmd(iob);
870 }
871
872 static void qeth_cancel_cmd(struct qeth_cmd_buffer *iob, int rc)
873 {
874 qeth_notify_cmd(iob, rc);
875 qeth_put_cmd(iob);
876 }
877
878 static struct qeth_cmd_buffer *qeth_alloc_cmd(struct qeth_channel *channel,
879 unsigned int length,
880 unsigned int ccws, long timeout)
881 {
882 struct qeth_cmd_buffer *iob;
883
884 if (length > QETH_BUFSIZE)
885 return NULL;
886
887 iob = kzalloc(sizeof(*iob), GFP_KERNEL);
888 if (!iob)
889 return NULL;
890
891 iob->data = kzalloc(ALIGN(length, 8) + ccws * sizeof(struct ccw1),
892 GFP_KERNEL | GFP_DMA);
893 if (!iob->data) {
894 kfree(iob);
895 return NULL;
896 }
897
898 init_completion(&iob->done);
899 spin_lock_init(&iob->lock);
900 refcount_set(&iob->ref_count, 1);
901 iob->channel = channel;
902 iob->timeout = timeout;
903 iob->length = length;
904 return iob;
905 }
906
907 static void qeth_issue_next_read_cb(struct qeth_card *card,
908 struct qeth_cmd_buffer *iob,
909 unsigned int data_length)
910 {
911 struct qeth_cmd_buffer *request = NULL;
912 struct qeth_ipa_cmd *cmd = NULL;
913 struct qeth_reply *reply = NULL;
914 struct qeth_cmd_buffer *tmp;
915 unsigned long flags;
916 int rc = 0;
917
918 QETH_CARD_TEXT(card, 4, "sndctlcb");
919 rc = qeth_check_idx_response(card, iob->data);
920 switch (rc) {
921 case 0:
922 break;
923 case -EIO:
924 qeth_schedule_recovery(card);
925 fallthrough;
926 default:
927 qeth_clear_ipacmd_list(card);
928 goto err_idx;
929 }
930
931 cmd = __ipa_reply(iob);
932 if (cmd) {
933 cmd = qeth_check_ipa_data(card, cmd);
934 if (!cmd)
935 goto out;
936 }
937
938 /* match against pending cmd requests */
939 spin_lock_irqsave(&card->lock, flags);
940 list_for_each_entry(tmp, &card->cmd_waiter_list, list_entry) {
941 if (tmp->match && tmp->match(tmp, iob)) {
942 request = tmp;
943 /* take the object outside the lock */
944 qeth_get_cmd(request);
945 break;
946 }
947 }
948 spin_unlock_irqrestore(&card->lock, flags);
949
950 if (!request)
951 goto out;
952
953 reply = &request->reply;
954 if (!reply->callback) {
955 rc = 0;
956 goto no_callback;
957 }
958
959 spin_lock_irqsave(&request->lock, flags);
960 if (request->rc)
961 /* Bail out when the requestor has already left: */
962 rc = request->rc;
963 else
964 rc = reply->callback(card, reply, cmd ? (unsigned long)cmd :
965 (unsigned long)iob);
966 spin_unlock_irqrestore(&request->lock, flags);
967
968 no_callback:
969 if (rc <= 0)
970 qeth_notify_cmd(request, rc);
971 qeth_put_cmd(request);
972 out:
973 memcpy(&card->seqno.pdu_hdr_ack,
974 QETH_PDU_HEADER_SEQ_NO(iob->data),
975 QETH_SEQ_NO_LENGTH);
976 __qeth_issue_next_read(card);
977 err_idx:
978 qeth_put_cmd(iob);
979 }
980
981 static int qeth_set_thread_start_bit(struct qeth_card *card,
982 unsigned long thread)
983 {
984 unsigned long flags;
985 int rc = 0;
986
987 spin_lock_irqsave(&card->thread_mask_lock, flags);
988 if (!(card->thread_allowed_mask & thread))
989 rc = -EPERM;
990 else if (card->thread_start_mask & thread)
991 rc = -EBUSY;
992 else
993 card->thread_start_mask |= thread;
994 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
995
996 return rc;
997 }
998
999 static void qeth_clear_thread_start_bit(struct qeth_card *card,
1000 unsigned long thread)
1001 {
1002 unsigned long flags;
1003
1004 spin_lock_irqsave(&card->thread_mask_lock, flags);
1005 card->thread_start_mask &= ~thread;
1006 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1007 wake_up(&card->wait_q);
1008 }
1009
1010 static void qeth_clear_thread_running_bit(struct qeth_card *card,
1011 unsigned long thread)
1012 {
1013 unsigned long flags;
1014
1015 spin_lock_irqsave(&card->thread_mask_lock, flags);
1016 card->thread_running_mask &= ~thread;
1017 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1018 wake_up_all(&card->wait_q);
1019 }
1020
1021 static int __qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
1022 {
1023 unsigned long flags;
1024 int rc = 0;
1025
1026 spin_lock_irqsave(&card->thread_mask_lock, flags);
1027 if (card->thread_start_mask & thread) {
1028 if ((card->thread_allowed_mask & thread) &&
1029 !(card->thread_running_mask & thread)) {
1030 rc = 1;
1031 card->thread_start_mask &= ~thread;
1032 card->thread_running_mask |= thread;
1033 } else
1034 rc = -EPERM;
1035 }
1036 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1037 return rc;
1038 }
1039
1040 static int qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
1041 {
1042 int rc = 0;
1043
1044 wait_event(card->wait_q,
1045 (rc = __qeth_do_run_thread(card, thread)) >= 0);
1046 return rc;
1047 }
1048
1049 int qeth_schedule_recovery(struct qeth_card *card)
1050 {
1051 int rc;
1052
1053 QETH_CARD_TEXT(card, 2, "startrec");
1054
1055 rc = qeth_set_thread_start_bit(card, QETH_RECOVER_THREAD);
1056 if (!rc)
1057 schedule_work(&card->kernel_thread_starter);
1058
1059 return rc;
1060 }
1061
1062 static int qeth_get_problem(struct qeth_card *card, struct ccw_device *cdev,
1063 struct irb *irb)
1064 {
1065 int dstat, cstat;
1066 char *sense;
1067
1068 sense = (char *) irb->ecw;
1069 cstat = irb->scsw.cmd.cstat;
1070 dstat = irb->scsw.cmd.dstat;
1071
1072 if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK |
1073 SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK |
1074 SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) {
1075 QETH_CARD_TEXT(card, 2, "CGENCHK");
1076 dev_warn(&cdev->dev, "The qeth device driver "
1077 "failed to recover an error on the device\n");
1078 QETH_DBF_MESSAGE(2, "check on channel %x with dstat=%#x, cstat=%#x\n",
1079 CCW_DEVID(cdev), dstat, cstat);
1080 print_hex_dump(KERN_WARNING, "qeth: irb ", DUMP_PREFIX_OFFSET,
1081 16, 1, irb, 64, 1);
1082 return -EIO;
1083 }
1084
1085 if (dstat & DEV_STAT_UNIT_CHECK) {
1086 if (sense[SENSE_RESETTING_EVENT_BYTE] &
1087 SENSE_RESETTING_EVENT_FLAG) {
1088 QETH_CARD_TEXT(card, 2, "REVIND");
1089 return -EIO;
1090 }
1091 if (sense[SENSE_COMMAND_REJECT_BYTE] &
1092 SENSE_COMMAND_REJECT_FLAG) {
1093 QETH_CARD_TEXT(card, 2, "CMDREJi");
1094 return -EIO;
1095 }
1096 if ((sense[2] == 0xaf) && (sense[3] == 0xfe)) {
1097 QETH_CARD_TEXT(card, 2, "AFFE");
1098 return -EIO;
1099 }
1100 if ((!sense[0]) && (!sense[1]) && (!sense[2]) && (!sense[3])) {
1101 QETH_CARD_TEXT(card, 2, "ZEROSEN");
1102 return 0;
1103 }
1104 QETH_CARD_TEXT(card, 2, "DGENCHK");
1105 return -EIO;
1106 }
1107 return 0;
1108 }
1109
1110 static int qeth_check_irb_error(struct qeth_card *card, struct ccw_device *cdev,
1111 struct irb *irb)
1112 {
1113 if (!IS_ERR(irb))
1114 return 0;
1115
1116 switch (PTR_ERR(irb)) {
1117 case -EIO:
1118 QETH_DBF_MESSAGE(2, "i/o-error on channel %x\n",
1119 CCW_DEVID(cdev));
1120 QETH_CARD_TEXT(card, 2, "ckirberr");
1121 QETH_CARD_TEXT_(card, 2, " rc%d", -EIO);
1122 return -EIO;
1123 case -ETIMEDOUT:
1124 dev_warn(&cdev->dev, "A hardware operation timed out"
1125 " on the device\n");
1126 QETH_CARD_TEXT(card, 2, "ckirberr");
1127 QETH_CARD_TEXT_(card, 2, " rc%d", -ETIMEDOUT);
1128 return -ETIMEDOUT;
1129 default:
1130 QETH_DBF_MESSAGE(2, "unknown error %ld on channel %x\n",
1131 PTR_ERR(irb), CCW_DEVID(cdev));
1132 QETH_CARD_TEXT(card, 2, "ckirberr");
1133 QETH_CARD_TEXT(card, 2, " rc???");
1134 return PTR_ERR(irb);
1135 }
1136 }
1137
1138 static void qeth_irq(struct ccw_device *cdev, unsigned long intparm,
1139 struct irb *irb)
1140 {
1141 int rc;
1142 int cstat, dstat;
1143 struct qeth_cmd_buffer *iob = NULL;
1144 struct ccwgroup_device *gdev;
1145 struct qeth_channel *channel;
1146 struct qeth_card *card;
1147
1148 /* while we hold the ccwdev lock, this stays valid: */
1149 gdev = dev_get_drvdata(&cdev->dev);
1150 card = dev_get_drvdata(&gdev->dev);
1151
1152 QETH_CARD_TEXT(card, 5, "irq");
1153
1154 if (card->read.ccwdev == cdev) {
1155 channel = &card->read;
1156 QETH_CARD_TEXT(card, 5, "read");
1157 } else if (card->write.ccwdev == cdev) {
1158 channel = &card->write;
1159 QETH_CARD_TEXT(card, 5, "write");
1160 } else {
1161 channel = &card->data;
1162 QETH_CARD_TEXT(card, 5, "data");
1163 }
1164
1165 if (intparm == 0) {
1166 QETH_CARD_TEXT(card, 5, "irqunsol");
1167 } else if ((addr_t)intparm != (addr_t)channel->active_cmd) {
1168 QETH_CARD_TEXT(card, 5, "irqunexp");
1169
1170 dev_err(&cdev->dev,
1171 "Received IRQ with intparm %lx, expected %px\n",
1172 intparm, channel->active_cmd);
1173 if (channel->active_cmd)
1174 qeth_cancel_cmd(channel->active_cmd, -EIO);
1175 } else {
1176 iob = (struct qeth_cmd_buffer *) (addr_t)intparm;
1177 }
1178
1179 qeth_unlock_channel(card, channel);
1180
1181 rc = qeth_check_irb_error(card, cdev, irb);
1182 if (rc) {
1183 /* IO was terminated, free its resources. */
1184 if (iob)
1185 qeth_cancel_cmd(iob, rc);
1186 return;
1187 }
1188
1189 if (irb->scsw.cmd.fctl & SCSW_FCTL_CLEAR_FUNC) {
1190 channel->state = CH_STATE_STOPPED;
1191 wake_up(&card->wait_q);
1192 }
1193
1194 if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) {
1195 channel->state = CH_STATE_HALTED;
1196 wake_up(&card->wait_q);
1197 }
1198
1199 if (iob && (irb->scsw.cmd.fctl & (SCSW_FCTL_CLEAR_FUNC |
1200 SCSW_FCTL_HALT_FUNC))) {
1201 qeth_cancel_cmd(iob, -ECANCELED);
1202 iob = NULL;
1203 }
1204
1205 cstat = irb->scsw.cmd.cstat;
1206 dstat = irb->scsw.cmd.dstat;
1207
1208 if ((dstat & DEV_STAT_UNIT_EXCEP) ||
1209 (dstat & DEV_STAT_UNIT_CHECK) ||
1210 (cstat)) {
1211 if (irb->esw.esw0.erw.cons) {
1212 dev_warn(&channel->ccwdev->dev,
1213 "The qeth device driver failed to recover "
1214 "an error on the device\n");
1215 QETH_DBF_MESSAGE(2, "sense data available on channel %x: cstat %#X dstat %#X\n",
1216 CCW_DEVID(channel->ccwdev), cstat,
1217 dstat);
1218 print_hex_dump(KERN_WARNING, "qeth: irb ",
1219 DUMP_PREFIX_OFFSET, 16, 1, irb, 32, 1);
1220 print_hex_dump(KERN_WARNING, "qeth: sense data ",
1221 DUMP_PREFIX_OFFSET, 16, 1, irb->ecw, 32, 1);
1222 }
1223
1224 rc = qeth_get_problem(card, cdev, irb);
1225 if (rc) {
1226 card->read_or_write_problem = 1;
1227 if (iob)
1228 qeth_cancel_cmd(iob, rc);
1229 qeth_clear_ipacmd_list(card);
1230 qeth_schedule_recovery(card);
1231 return;
1232 }
1233 }
1234
1235 if (iob) {
1236 /* sanity check: */
1237 if (irb->scsw.cmd.count > iob->length) {
1238 qeth_cancel_cmd(iob, -EIO);
1239 return;
1240 }
1241 if (iob->callback)
1242 iob->callback(card, iob,
1243 iob->length - irb->scsw.cmd.count);
1244 }
1245 }
1246
1247 static void qeth_notify_skbs(struct qeth_qdio_out_q *q,
1248 struct qeth_qdio_out_buffer *buf,
1249 enum iucv_tx_notify notification)
1250 {
1251 struct sk_buff *skb;
1252
1253 skb_queue_walk(&buf->skb_list, skb) {
1254 struct sock *sk = skb->sk;
1255
1256 QETH_CARD_TEXT_(q->card, 5, "skbn%d", notification);
1257 QETH_CARD_TEXT_(q->card, 5, "%lx", (long) skb);
1258 if (sk && sk->sk_family == PF_IUCV)
1259 iucv_sk(sk)->sk_txnotify(sk, notification);
1260 }
1261 }
1262
1263 static void qeth_tx_complete_buf(struct qeth_qdio_out_q *queue,
1264 struct qeth_qdio_out_buffer *buf, bool error,
1265 int budget)
1266 {
1267 struct sk_buff *skb;
1268
1269 /* Empty buffer? */
1270 if (buf->next_element_to_fill == 0)
1271 return;
1272
1273 QETH_TXQ_STAT_INC(queue, bufs);
1274 QETH_TXQ_STAT_ADD(queue, buf_elements, buf->next_element_to_fill);
1275 if (error) {
1276 QETH_TXQ_STAT_ADD(queue, tx_errors, buf->frames);
1277 } else {
1278 QETH_TXQ_STAT_ADD(queue, tx_packets, buf->frames);
1279 QETH_TXQ_STAT_ADD(queue, tx_bytes, buf->bytes);
1280 }
1281
1282 while ((skb = __skb_dequeue(&buf->skb_list)) != NULL) {
1283 unsigned int bytes = qdisc_pkt_len(skb);
1284 bool is_tso = skb_is_gso(skb);
1285 unsigned int packets;
1286
1287 packets = is_tso ? skb_shinfo(skb)->gso_segs : 1;
1288 if (!error) {
1289 if (skb->ip_summed == CHECKSUM_PARTIAL)
1290 QETH_TXQ_STAT_ADD(queue, skbs_csum, packets);
1291 if (skb_is_nonlinear(skb))
1292 QETH_TXQ_STAT_INC(queue, skbs_sg);
1293 if (is_tso) {
1294 QETH_TXQ_STAT_INC(queue, skbs_tso);
1295 QETH_TXQ_STAT_ADD(queue, tso_bytes, bytes);
1296 }
1297 }
1298
1299 napi_consume_skb(skb, budget);
1300 }
1301 }
1302
1303 static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
1304 struct qeth_qdio_out_buffer *buf,
1305 bool error, int budget)
1306 {
1307 int i;
1308
1309 /* is PCI flag set on buffer? */
1310 if (buf->buffer->element[0].sflags & SBAL_SFLAGS0_PCI_REQ) {
1311 atomic_dec(&queue->set_pci_flags_count);
1312 QETH_TXQ_STAT_INC(queue, completion_irq);
1313 }
1314
1315 qeth_tx_complete_buf(queue, buf, error, budget);
1316
1317 for (i = 0; i < queue->max_elements; ++i) {
1318 void *data = phys_to_virt(buf->buffer->element[i].addr);
1319
1320 if (__test_and_clear_bit(i, buf->from_kmem_cache) && data)
1321 kmem_cache_free(qeth_core_header_cache, data);
1322 }
1323
1324 qeth_scrub_qdio_buffer(buf->buffer, queue->max_elements);
1325 buf->next_element_to_fill = 0;
1326 buf->frames = 0;
1327 buf->bytes = 0;
1328 atomic_set(&buf->state, QETH_QDIO_BUF_EMPTY);
1329 }
1330
1331 static void qeth_free_out_buf(struct qeth_qdio_out_buffer *buf)
1332 {
1333 if (buf->aob)
1334 kmem_cache_free(qeth_qaob_cache, buf->aob);
1335 kmem_cache_free(qeth_qdio_outbuf_cache, buf);
1336 }
1337
1338 static void qeth_tx_complete_pending_bufs(struct qeth_card *card,
1339 struct qeth_qdio_out_q *queue,
1340 bool drain, int budget)
1341 {
1342 struct qeth_qdio_out_buffer *buf, *tmp;
1343
1344 list_for_each_entry_safe(buf, tmp, &queue->pending_bufs, list_entry) {
1345 struct qeth_qaob_priv1 *priv;
1346 struct qaob *aob = buf->aob;
1347 enum iucv_tx_notify notify;
1348 unsigned int i;
1349
1350 priv = (struct qeth_qaob_priv1 *)&aob->user1;
1351 if (drain || READ_ONCE(priv->state) == QETH_QAOB_DONE) {
1352 QETH_CARD_TEXT(card, 5, "fp");
1353 QETH_CARD_TEXT_(card, 5, "%lx", (long) buf);
1354
1355 notify = drain ? TX_NOTIFY_GENERALERROR :
1356 qeth_compute_cq_notification(aob->aorc, 1);
1357 qeth_notify_skbs(queue, buf, notify);
1358 qeth_tx_complete_buf(queue, buf, drain, budget);
1359
1360 for (i = 0;
1361 i < aob->sb_count && i < queue->max_elements;
1362 i++) {
1363 void *data = phys_to_virt(aob->sba[i]);
1364
1365 if (test_bit(i, buf->from_kmem_cache) && data)
1366 kmem_cache_free(qeth_core_header_cache,
1367 data);
1368 }
1369
1370 list_del(&buf->list_entry);
1371 qeth_free_out_buf(buf);
1372 }
1373 }
1374 }
1375
1376 static void qeth_drain_output_queue(struct qeth_qdio_out_q *q, bool free)
1377 {
1378 int j;
1379
1380 qeth_tx_complete_pending_bufs(q->card, q, true, 0);
1381
1382 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
1383 if (!q->bufs[j])
1384 continue;
1385
1386 qeth_clear_output_buffer(q, q->bufs[j], true, 0);
1387 if (free) {
1388 qeth_free_out_buf(q->bufs[j]);
1389 q->bufs[j] = NULL;
1390 }
1391 }
1392 }
1393
1394 static void qeth_drain_output_queues(struct qeth_card *card)
1395 {
1396 int i;
1397
1398 QETH_CARD_TEXT(card, 2, "clearqdbf");
1399 /* clear outbound buffers to free skbs */
1400 for (i = 0; i < card->qdio.no_out_queues; ++i) {
1401 if (card->qdio.out_qs[i])
1402 qeth_drain_output_queue(card->qdio.out_qs[i], false);
1403 }
1404 }
1405
1406 static void qeth_osa_set_output_queues(struct qeth_card *card, bool single)
1407 {
1408 unsigned int max = single ? 1 : card->dev->num_tx_queues;
1409
1410 if (card->qdio.no_out_queues == max)
1411 return;
1412
1413 if (atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED)
1414 qeth_free_qdio_queues(card);
1415
1416 if (max == 1 && card->qdio.do_prio_queueing != QETH_PRIOQ_DEFAULT)
1417 dev_info(&card->gdev->dev, "Priority Queueing not supported\n");
1418
1419 card->qdio.no_out_queues = max;
1420 }
1421
1422 static int qeth_update_from_chp_desc(struct qeth_card *card)
1423 {
1424 struct ccw_device *ccwdev;
1425 struct channel_path_desc_fmt0 *chp_dsc;
1426
1427 QETH_CARD_TEXT(card, 2, "chp_desc");
1428
1429 ccwdev = card->data.ccwdev;
1430 chp_dsc = ccw_device_get_chp_desc(ccwdev, 0);
1431 if (!chp_dsc)
1432 return -ENOMEM;
1433
1434 card->info.func_level = 0x4100 + chp_dsc->desc;
1435
1436 if (IS_OSD(card) || IS_OSX(card))
1437 /* CHPP field bit 6 == 1 -> single queue */
1438 qeth_osa_set_output_queues(card, chp_dsc->chpp & 0x02);
1439
1440 kfree(chp_dsc);
1441 QETH_CARD_TEXT_(card, 2, "nr:%x", card->qdio.no_out_queues);
1442 QETH_CARD_TEXT_(card, 2, "lvl:%02x", card->info.func_level);
1443 return 0;
1444 }
1445
1446 static void qeth_init_qdio_info(struct qeth_card *card)
1447 {
1448 QETH_CARD_TEXT(card, 4, "intqdinf");
1449 atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
1450 card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT;
1451 card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
1452
1453 /* inbound */
1454 card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
1455 if (IS_IQD(card))
1456 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_HSDEFAULT;
1457 else
1458 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_DEFAULT;
1459 card->qdio.in_buf_pool.buf_count = card->qdio.init_pool.buf_count;
1460 INIT_LIST_HEAD(&card->qdio.in_buf_pool.entry_list);
1461 INIT_LIST_HEAD(&card->qdio.init_pool.entry_list);
1462 }
1463
1464 static void qeth_set_initial_options(struct qeth_card *card)
1465 {
1466 card->options.route4.type = NO_ROUTER;
1467 card->options.route6.type = NO_ROUTER;
1468 card->options.isolation = ISOLATION_MODE_NONE;
1469 card->options.cq = QETH_CQ_DISABLED;
1470 card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
1471 }
1472
1473 static int qeth_do_start_thread(struct qeth_card *card, unsigned long thread)
1474 {
1475 unsigned long flags;
1476 int rc = 0;
1477
1478 spin_lock_irqsave(&card->thread_mask_lock, flags);
1479 QETH_CARD_TEXT_(card, 4, " %02x%02x%02x",
1480 (u8) card->thread_start_mask,
1481 (u8) card->thread_allowed_mask,
1482 (u8) card->thread_running_mask);
1483 rc = (card->thread_start_mask & thread);
1484 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1485 return rc;
1486 }
1487
1488 static int qeth_do_reset(void *data);
1489 static void qeth_start_kernel_thread(struct work_struct *work)
1490 {
1491 struct task_struct *ts;
1492 struct qeth_card *card = container_of(work, struct qeth_card,
1493 kernel_thread_starter);
1494 QETH_CARD_TEXT(card, 2, "strthrd");
1495
1496 if (card->read.state != CH_STATE_UP &&
1497 card->write.state != CH_STATE_UP)
1498 return;
1499 if (qeth_do_start_thread(card, QETH_RECOVER_THREAD)) {
1500 ts = kthread_run(qeth_do_reset, card, "qeth_recover");
1501 if (IS_ERR(ts)) {
1502 qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1503 qeth_clear_thread_running_bit(card,
1504 QETH_RECOVER_THREAD);
1505 }
1506 }
1507 }
1508
1509 static void qeth_buffer_reclaim_work(struct work_struct *);
1510 static void qeth_setup_card(struct qeth_card *card)
1511 {
1512 QETH_CARD_TEXT(card, 2, "setupcrd");
1513
1514 card->info.type = CARD_RDEV(card)->id.driver_info;
1515 card->state = CARD_STATE_DOWN;
1516 spin_lock_init(&card->lock);
1517 spin_lock_init(&card->thread_mask_lock);
1518 mutex_init(&card->conf_mutex);
1519 mutex_init(&card->discipline_mutex);
1520 INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread);
1521 INIT_LIST_HEAD(&card->cmd_waiter_list);
1522 init_waitqueue_head(&card->wait_q);
1523 qeth_set_initial_options(card);
1524 /* IP address takeover */
1525 INIT_LIST_HEAD(&card->ipato.entries);
1526 qeth_init_qdio_info(card);
1527 INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work);
1528 hash_init(card->rx_mode_addrs);
1529 hash_init(card->local_addrs4);
1530 hash_init(card->local_addrs6);
1531 spin_lock_init(&card->local_addrs4_lock);
1532 spin_lock_init(&card->local_addrs6_lock);
1533 }
1534
1535 static void qeth_core_sl_print(struct seq_file *m, struct service_level *slr)
1536 {
1537 struct qeth_card *card = container_of(slr, struct qeth_card,
1538 qeth_service_level);
1539 if (card->info.mcl_level[0])
1540 seq_printf(m, "qeth: %s firmware level %s\n",
1541 CARD_BUS_ID(card), card->info.mcl_level);
1542 }
1543
1544 static struct qeth_card *qeth_alloc_card(struct ccwgroup_device *gdev)
1545 {
1546 struct qeth_card *card;
1547
1548 QETH_DBF_TEXT(SETUP, 2, "alloccrd");
1549 card = kzalloc(sizeof(*card), GFP_KERNEL);
1550 if (!card)
1551 goto out;
1552 QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1553
1554 card->gdev = gdev;
1555 dev_set_drvdata(&gdev->dev, card);
1556 CARD_RDEV(card) = gdev->cdev[0];
1557 CARD_WDEV(card) = gdev->cdev[1];
1558 CARD_DDEV(card) = gdev->cdev[2];
1559
1560 card->event_wq = alloc_ordered_workqueue("%s_event", 0,
1561 dev_name(&gdev->dev));
1562 if (!card->event_wq)
1563 goto out_wq;
1564
1565 card->read_cmd = qeth_alloc_cmd(&card->read, QETH_BUFSIZE, 1, 0);
1566 if (!card->read_cmd)
1567 goto out_read_cmd;
1568
1569 card->debugfs = debugfs_create_dir(dev_name(&gdev->dev),
1570 qeth_debugfs_root);
1571 debugfs_create_file("local_addrs", 0400, card->debugfs, card,
1572 &qeth_debugfs_local_addr_fops);
1573
1574 card->qeth_service_level.seq_print = qeth_core_sl_print;
1575 register_service_level(&card->qeth_service_level);
1576 return card;
1577
1578 out_read_cmd:
1579 destroy_workqueue(card->event_wq);
1580 out_wq:
1581 dev_set_drvdata(&gdev->dev, NULL);
1582 kfree(card);
1583 out:
1584 return NULL;
1585 }
1586
1587 static int qeth_clear_channel(struct qeth_card *card,
1588 struct qeth_channel *channel)
1589 {
1590 int rc;
1591
1592 QETH_CARD_TEXT(card, 3, "clearch");
1593 spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1594 rc = ccw_device_clear(channel->ccwdev, (addr_t)channel->active_cmd);
1595 spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1596
1597 if (rc)
1598 return rc;
1599 rc = wait_event_interruptible_timeout(card->wait_q,
1600 channel->state == CH_STATE_STOPPED, QETH_TIMEOUT);
1601 if (rc == -ERESTARTSYS)
1602 return rc;
1603 if (channel->state != CH_STATE_STOPPED)
1604 return -ETIME;
1605 channel->state = CH_STATE_DOWN;
1606 return 0;
1607 }
1608
1609 static int qeth_halt_channel(struct qeth_card *card,
1610 struct qeth_channel *channel)
1611 {
1612 int rc;
1613
1614 QETH_CARD_TEXT(card, 3, "haltch");
1615 spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1616 rc = ccw_device_halt(channel->ccwdev, (addr_t)channel->active_cmd);
1617 spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1618
1619 if (rc)
1620 return rc;
1621 rc = wait_event_interruptible_timeout(card->wait_q,
1622 channel->state == CH_STATE_HALTED, QETH_TIMEOUT);
1623 if (rc == -ERESTARTSYS)
1624 return rc;
1625 if (channel->state != CH_STATE_HALTED)
1626 return -ETIME;
1627 return 0;
1628 }
1629
1630 static int qeth_stop_channel(struct qeth_channel *channel)
1631 {
1632 struct ccw_device *cdev = channel->ccwdev;
1633 int rc;
1634
1635 rc = ccw_device_set_offline(cdev);
1636
1637 spin_lock_irq(get_ccwdev_lock(cdev));
1638 if (channel->active_cmd)
1639 dev_err(&cdev->dev, "Stopped channel while cmd %px was still active\n",
1640 channel->active_cmd);
1641
1642 cdev->handler = NULL;
1643 spin_unlock_irq(get_ccwdev_lock(cdev));
1644
1645 return rc;
1646 }
1647
1648 static int qeth_start_channel(struct qeth_channel *channel)
1649 {
1650 struct ccw_device *cdev = channel->ccwdev;
1651 int rc;
1652
1653 channel->state = CH_STATE_DOWN;
1654 xchg(&channel->active_cmd, NULL);
1655
1656 spin_lock_irq(get_ccwdev_lock(cdev));
1657 cdev->handler = qeth_irq;
1658 spin_unlock_irq(get_ccwdev_lock(cdev));
1659
1660 rc = ccw_device_set_online(cdev);
1661 if (rc)
1662 goto err;
1663
1664 return 0;
1665
1666 err:
1667 spin_lock_irq(get_ccwdev_lock(cdev));
1668 cdev->handler = NULL;
1669 spin_unlock_irq(get_ccwdev_lock(cdev));
1670 return rc;
1671 }
1672
1673 static int qeth_halt_channels(struct qeth_card *card)
1674 {
1675 int rc1 = 0, rc2 = 0, rc3 = 0;
1676
1677 QETH_CARD_TEXT(card, 3, "haltchs");
1678 rc1 = qeth_halt_channel(card, &card->read);
1679 rc2 = qeth_halt_channel(card, &card->write);
1680 rc3 = qeth_halt_channel(card, &card->data);
1681 if (rc1)
1682 return rc1;
1683 if (rc2)
1684 return rc2;
1685 return rc3;
1686 }
1687
1688 static int qeth_clear_channels(struct qeth_card *card)
1689 {
1690 int rc1 = 0, rc2 = 0, rc3 = 0;
1691
1692 QETH_CARD_TEXT(card, 3, "clearchs");
1693 rc1 = qeth_clear_channel(card, &card->read);
1694 rc2 = qeth_clear_channel(card, &card->write);
1695 rc3 = qeth_clear_channel(card, &card->data);
1696 if (rc1)
1697 return rc1;
1698 if (rc2)
1699 return rc2;
1700 return rc3;
1701 }
1702
1703 static int qeth_clear_halt_card(struct qeth_card *card, int halt)
1704 {
1705 int rc = 0;
1706
1707 QETH_CARD_TEXT(card, 3, "clhacrd");
1708
1709 if (halt)
1710 rc = qeth_halt_channels(card);
1711 if (rc)
1712 return rc;
1713 return qeth_clear_channels(card);
1714 }
1715
1716 static int qeth_qdio_clear_card(struct qeth_card *card, int use_halt)
1717 {
1718 int rc = 0;
1719
1720 QETH_CARD_TEXT(card, 3, "qdioclr");
1721 switch (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ESTABLISHED,
1722 QETH_QDIO_CLEANING)) {
1723 case QETH_QDIO_ESTABLISHED:
1724 if (IS_IQD(card))
1725 rc = qdio_shutdown(CARD_DDEV(card),
1726 QDIO_FLAG_CLEANUP_USING_HALT);
1727 else
1728 rc = qdio_shutdown(CARD_DDEV(card),
1729 QDIO_FLAG_CLEANUP_USING_CLEAR);
1730 if (rc)
1731 QETH_CARD_TEXT_(card, 3, "1err%d", rc);
1732 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
1733 break;
1734 case QETH_QDIO_CLEANING:
1735 return rc;
1736 default:
1737 break;
1738 }
1739 rc = qeth_clear_halt_card(card, use_halt);
1740 if (rc)
1741 QETH_CARD_TEXT_(card, 3, "2err%d", rc);
1742 return rc;
1743 }
1744
1745 static enum qeth_discipline_id qeth_vm_detect_layer(struct qeth_card *card)
1746 {
1747 enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1748 struct diag26c_vnic_resp *response = NULL;
1749 struct diag26c_vnic_req *request = NULL;
1750 struct ccw_dev_id id;
1751 char userid[80];
1752 int rc = 0;
1753
1754 QETH_CARD_TEXT(card, 2, "vmlayer");
1755
1756 cpcmd("QUERY USERID", userid, sizeof(userid), &rc);
1757 if (rc)
1758 goto out;
1759
1760 request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
1761 response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
1762 if (!request || !response) {
1763 rc = -ENOMEM;
1764 goto out;
1765 }
1766
1767 ccw_device_get_id(CARD_RDEV(card), &id);
1768 request->resp_buf_len = sizeof(*response);
1769 request->resp_version = DIAG26C_VERSION6_VM65918;
1770 request->req_format = DIAG26C_VNIC_INFO;
1771 ASCEBC(userid, 8);
1772 memcpy(&request->sys_name, userid, 8);
1773 request->devno = id.devno;
1774
1775 QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1776 rc = diag26c(request, response, DIAG26C_PORT_VNIC);
1777 QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1778 if (rc)
1779 goto out;
1780 QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
1781
1782 if (request->resp_buf_len < sizeof(*response) ||
1783 response->version != request->resp_version) {
1784 rc = -EIO;
1785 goto out;
1786 }
1787
1788 if (response->protocol == VNIC_INFO_PROT_L2)
1789 disc = QETH_DISCIPLINE_LAYER2;
1790 else if (response->protocol == VNIC_INFO_PROT_L3)
1791 disc = QETH_DISCIPLINE_LAYER3;
1792
1793 out:
1794 kfree(response);
1795 kfree(request);
1796 if (rc)
1797 QETH_CARD_TEXT_(card, 2, "err%x", rc);
1798 return disc;
1799 }
1800
1801 /* Determine whether the device requires a specific layer discipline */
1802 static enum qeth_discipline_id qeth_enforce_discipline(struct qeth_card *card)
1803 {
1804 enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1805
1806 if (IS_OSM(card))
1807 disc = QETH_DISCIPLINE_LAYER2;
1808 else if (IS_VM_NIC(card))
1809 disc = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
1810 qeth_vm_detect_layer(card);
1811
1812 switch (disc) {
1813 case QETH_DISCIPLINE_LAYER2:
1814 QETH_CARD_TEXT(card, 3, "force l2");
1815 break;
1816 case QETH_DISCIPLINE_LAYER3:
1817 QETH_CARD_TEXT(card, 3, "force l3");
1818 break;
1819 default:
1820 QETH_CARD_TEXT(card, 3, "force no");
1821 }
1822
1823 return disc;
1824 }
1825
1826 static void qeth_set_blkt_defaults(struct qeth_card *card)
1827 {
1828 QETH_CARD_TEXT(card, 2, "cfgblkt");
1829
1830 if (card->info.use_v1_blkt) {
1831 card->info.blkt.time_total = 0;
1832 card->info.blkt.inter_packet = 0;
1833 card->info.blkt.inter_packet_jumbo = 0;
1834 } else {
1835 card->info.blkt.time_total = 250;
1836 card->info.blkt.inter_packet = 5;
1837 card->info.blkt.inter_packet_jumbo = 15;
1838 }
1839 }
1840
1841 static void qeth_idx_init(struct qeth_card *card)
1842 {
1843 memset(&card->seqno, 0, sizeof(card->seqno));
1844
1845 card->token.issuer_rm_w = 0x00010103UL;
1846 card->token.cm_filter_w = 0x00010108UL;
1847 card->token.cm_connection_w = 0x0001010aUL;
1848 card->token.ulp_filter_w = 0x0001010bUL;
1849 card->token.ulp_connection_w = 0x0001010dUL;
1850
1851 switch (card->info.type) {
1852 case QETH_CARD_TYPE_IQD:
1853 card->info.func_level = QETH_IDX_FUNC_LEVEL_IQD;
1854 break;
1855 case QETH_CARD_TYPE_OSD:
1856 card->info.func_level = QETH_IDX_FUNC_LEVEL_OSD;
1857 break;
1858 default:
1859 break;
1860 }
1861 }
1862
1863 static void qeth_idx_finalize_cmd(struct qeth_card *card,
1864 struct qeth_cmd_buffer *iob)
1865 {
1866 memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data), &card->seqno.trans_hdr,
1867 QETH_SEQ_NO_LENGTH);
1868 if (iob->channel == &card->write)
1869 card->seqno.trans_hdr++;
1870 }
1871
1872 static int qeth_peer_func_level(int level)
1873 {
1874 if ((level & 0xff) == 8)
1875 return (level & 0xff) + 0x400;
1876 if (((level >> 8) & 3) == 1)
1877 return (level & 0xff) + 0x200;
1878 return level;
1879 }
1880
1881 static void qeth_mpc_finalize_cmd(struct qeth_card *card,
1882 struct qeth_cmd_buffer *iob)
1883 {
1884 qeth_idx_finalize_cmd(card, iob);
1885
1886 memcpy(QETH_PDU_HEADER_SEQ_NO(iob->data),
1887 &card->seqno.pdu_hdr, QETH_SEQ_NO_LENGTH);
1888 card->seqno.pdu_hdr++;
1889 memcpy(QETH_PDU_HEADER_ACK_SEQ_NO(iob->data),
1890 &card->seqno.pdu_hdr_ack, QETH_SEQ_NO_LENGTH);
1891
1892 iob->callback = qeth_release_buffer_cb;
1893 }
1894
1895 static bool qeth_mpc_match_reply(struct qeth_cmd_buffer *iob,
1896 struct qeth_cmd_buffer *reply)
1897 {
1898 /* MPC cmds are issued strictly in sequence. */
1899 return !IS_IPA(reply->data);
1900 }
1901
1902 static struct qeth_cmd_buffer *qeth_mpc_alloc_cmd(struct qeth_card *card,
1903 const void *data,
1904 unsigned int data_length)
1905 {
1906 struct qeth_cmd_buffer *iob;
1907
1908 iob = qeth_alloc_cmd(&card->write, data_length, 1, QETH_TIMEOUT);
1909 if (!iob)
1910 return NULL;
1911
1912 memcpy(iob->data, data, data_length);
1913 qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, data_length,
1914 iob->data);
1915 iob->finalize = qeth_mpc_finalize_cmd;
1916 iob->match = qeth_mpc_match_reply;
1917 return iob;
1918 }
1919
1920 /**
1921 * qeth_send_control_data() - send control command to the card
1922 * @card: qeth_card structure pointer
1923 * @iob: qeth_cmd_buffer pointer
1924 * @reply_cb: callback function pointer
1925 * cb_card: pointer to the qeth_card structure
1926 * cb_reply: pointer to the qeth_reply structure
1927 * cb_cmd: pointer to the original iob for non-IPA
1928 * commands, or to the qeth_ipa_cmd structure
1929 * for the IPA commands.
1930 * @reply_param: private pointer passed to the callback
1931 *
1932 * Callback function gets called one or more times, with cb_cmd
1933 * pointing to the response returned by the hardware. Callback
1934 * function must return
1935 * > 0 if more reply blocks are expected,
1936 * 0 if the last or only reply block is received, and
1937 * < 0 on error.
1938 * Callback function can get the value of the reply_param pointer from the
1939 * field 'param' of the structure qeth_reply.
1940 */
1941
1942 static int qeth_send_control_data(struct qeth_card *card,
1943 struct qeth_cmd_buffer *iob,
1944 int (*reply_cb)(struct qeth_card *cb_card,
1945 struct qeth_reply *cb_reply,
1946 unsigned long cb_cmd),
1947 void *reply_param)
1948 {
1949 struct qeth_channel *channel = iob->channel;
1950 struct qeth_reply *reply = &iob->reply;
1951 long timeout = iob->timeout;
1952 int rc;
1953
1954 QETH_CARD_TEXT(card, 2, "sendctl");
1955
1956 reply->callback = reply_cb;
1957 reply->param = reply_param;
1958
1959 timeout = wait_event_interruptible_timeout(card->wait_q,
1960 qeth_trylock_channel(channel, iob),
1961 timeout);
1962 if (timeout <= 0) {
1963 qeth_put_cmd(iob);
1964 return (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
1965 }
1966
1967 if (iob->finalize)
1968 iob->finalize(card, iob);
1969 QETH_DBF_HEX(CTRL, 2, iob->data, min(iob->length, QETH_DBF_CTRL_LEN));
1970
1971 qeth_enqueue_cmd(card, iob);
1972
1973 /* This pairs with iob->callback, and keeps the iob alive after IO: */
1974 qeth_get_cmd(iob);
1975
1976 QETH_CARD_TEXT(card, 6, "noirqpnd");
1977 spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1978 rc = ccw_device_start_timeout(channel->ccwdev, __ccw_from_cmd(iob),
1979 (addr_t) iob, 0, 0, timeout);
1980 spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1981 if (rc) {
1982 QETH_DBF_MESSAGE(2, "qeth_send_control_data on device %x: ccw_device_start rc = %i\n",
1983 CARD_DEVID(card), rc);
1984 QETH_CARD_TEXT_(card, 2, " err%d", rc);
1985 qeth_dequeue_cmd(card, iob);
1986 qeth_put_cmd(iob);
1987 qeth_unlock_channel(card, channel);
1988 goto out;
1989 }
1990
1991 timeout = wait_for_completion_interruptible_timeout(&iob->done,
1992 timeout);
1993 if (timeout <= 0)
1994 rc = (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
1995
1996 qeth_dequeue_cmd(card, iob);
1997
1998 if (reply_cb) {
1999 /* Wait until the callback for a late reply has completed: */
2000 spin_lock_irq(&iob->lock);
2001 if (rc)
2002 /* Zap any callback that's still pending: */
2003 iob->rc = rc;
2004 spin_unlock_irq(&iob->lock);
2005 }
2006
2007 if (!rc)
2008 rc = iob->rc;
2009
2010 out:
2011 qeth_put_cmd(iob);
2012 return rc;
2013 }
2014
2015 struct qeth_node_desc {
2016 struct node_descriptor nd1;
2017 struct node_descriptor nd2;
2018 struct node_descriptor nd3;
2019 };
2020
2021 static void qeth_read_conf_data_cb(struct qeth_card *card,
2022 struct qeth_cmd_buffer *iob,
2023 unsigned int data_length)
2024 {
2025 struct qeth_node_desc *nd = (struct qeth_node_desc *) iob->data;
2026 int rc = 0;
2027 u8 *tag;
2028
2029 QETH_CARD_TEXT(card, 2, "cfgunit");
2030
2031 if (data_length < sizeof(*nd)) {
2032 rc = -EINVAL;
2033 goto out;
2034 }
2035
2036 card->info.is_vm_nic = nd->nd1.plant[0] == _ascebc['V'] &&
2037 nd->nd1.plant[1] == _ascebc['M'];
2038 tag = (u8 *)&nd->nd1.tag;
2039 card->info.chpid = tag[0];
2040 card->info.unit_addr2 = tag[1];
2041
2042 tag = (u8 *)&nd->nd2.tag;
2043 card->info.cula = tag[1];
2044
2045 card->info.use_v1_blkt = nd->nd3.model[0] == 0xF0 &&
2046 nd->nd3.model[1] == 0xF0 &&
2047 nd->nd3.model[2] >= 0xF1 &&
2048 nd->nd3.model[2] <= 0xF4;
2049
2050 out:
2051 qeth_notify_cmd(iob, rc);
2052 qeth_put_cmd(iob);
2053 }
2054
2055 static int qeth_read_conf_data(struct qeth_card *card)
2056 {
2057 struct qeth_channel *channel = &card->data;
2058 struct qeth_cmd_buffer *iob;
2059 struct ciw *ciw;
2060
2061 /* scan for RCD command in extended SenseID data */
2062 ciw = ccw_device_get_ciw(channel->ccwdev, CIW_TYPE_RCD);
2063 if (!ciw || ciw->cmd == 0)
2064 return -EOPNOTSUPP;
2065 if (ciw->count < sizeof(struct qeth_node_desc))
2066 return -EINVAL;
2067
2068 iob = qeth_alloc_cmd(channel, ciw->count, 1, QETH_RCD_TIMEOUT);
2069 if (!iob)
2070 return -ENOMEM;
2071
2072 iob->callback = qeth_read_conf_data_cb;
2073 qeth_setup_ccw(__ccw_from_cmd(iob), ciw->cmd, 0, iob->length,
2074 iob->data);
2075
2076 return qeth_send_control_data(card, iob, NULL, NULL);
2077 }
2078
2079 static int qeth_idx_check_activate_response(struct qeth_card *card,
2080 struct qeth_channel *channel,
2081 struct qeth_cmd_buffer *iob)
2082 {
2083 int rc;
2084
2085 rc = qeth_check_idx_response(card, iob->data);
2086 if (rc)
2087 return rc;
2088
2089 if (QETH_IS_IDX_ACT_POS_REPLY(iob->data))
2090 return 0;
2091
2092 /* negative reply: */
2093 QETH_CARD_TEXT_(card, 2, "idxneg%c",
2094 QETH_IDX_ACT_CAUSE_CODE(iob->data));
2095
2096 switch (QETH_IDX_ACT_CAUSE_CODE(iob->data)) {
2097 case QETH_IDX_ACT_ERR_EXCL:
2098 dev_err(&channel->ccwdev->dev,
2099 "The adapter is used exclusively by another host\n");
2100 return -EBUSY;
2101 case QETH_IDX_ACT_ERR_AUTH:
2102 case QETH_IDX_ACT_ERR_AUTH_USER:
2103 dev_err(&channel->ccwdev->dev,
2104 "Setting the device online failed because of insufficient authorization\n");
2105 return -EPERM;
2106 default:
2107 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: negative reply\n",
2108 CCW_DEVID(channel->ccwdev));
2109 return -EIO;
2110 }
2111 }
2112
2113 static void qeth_idx_activate_read_channel_cb(struct qeth_card *card,
2114 struct qeth_cmd_buffer *iob,
2115 unsigned int data_length)
2116 {
2117 struct qeth_channel *channel = iob->channel;
2118 u16 peer_level;
2119 int rc;
2120
2121 QETH_CARD_TEXT(card, 2, "idxrdcb");
2122
2123 rc = qeth_idx_check_activate_response(card, channel, iob);
2124 if (rc)
2125 goto out;
2126
2127 memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2128 if (peer_level != qeth_peer_func_level(card->info.func_level)) {
2129 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
2130 CCW_DEVID(channel->ccwdev),
2131 card->info.func_level, peer_level);
2132 rc = -EINVAL;
2133 goto out;
2134 }
2135
2136 memcpy(&card->token.issuer_rm_r,
2137 QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2138 QETH_MPC_TOKEN_LENGTH);
2139 memcpy(&card->info.mcl_level[0],
2140 QETH_IDX_REPLY_LEVEL(iob->data), QETH_MCL_LENGTH);
2141
2142 out:
2143 qeth_notify_cmd(iob, rc);
2144 qeth_put_cmd(iob);
2145 }
2146
2147 static void qeth_idx_activate_write_channel_cb(struct qeth_card *card,
2148 struct qeth_cmd_buffer *iob,
2149 unsigned int data_length)
2150 {
2151 struct qeth_channel *channel = iob->channel;
2152 u16 peer_level;
2153 int rc;
2154
2155 QETH_CARD_TEXT(card, 2, "idxwrcb");
2156
2157 rc = qeth_idx_check_activate_response(card, channel, iob);
2158 if (rc)
2159 goto out;
2160
2161 memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2162 if ((peer_level & ~0x0100) !=
2163 qeth_peer_func_level(card->info.func_level)) {
2164 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
2165 CCW_DEVID(channel->ccwdev),
2166 card->info.func_level, peer_level);
2167 rc = -EINVAL;
2168 }
2169
2170 out:
2171 qeth_notify_cmd(iob, rc);
2172 qeth_put_cmd(iob);
2173 }
2174
2175 static void qeth_idx_setup_activate_cmd(struct qeth_card *card,
2176 struct qeth_cmd_buffer *iob)
2177 {
2178 u16 addr = (card->info.cula << 8) + card->info.unit_addr2;
2179 u8 port = ((u8)card->dev->dev_port) | 0x80;
2180 struct ccw1 *ccw = __ccw_from_cmd(iob);
2181
2182 qeth_setup_ccw(&ccw[0], CCW_CMD_WRITE, CCW_FLAG_CC, IDX_ACTIVATE_SIZE,
2183 iob->data);
2184 qeth_setup_ccw(&ccw[1], CCW_CMD_READ, 0, iob->length, iob->data);
2185 iob->finalize = qeth_idx_finalize_cmd;
2186
2187 port |= QETH_IDX_ACT_INVAL_FRAME;
2188 memcpy(QETH_IDX_ACT_PNO(iob->data), &port, 1);
2189 memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2190 &card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH);
2191 memcpy(QETH_IDX_ACT_FUNC_LEVEL(iob->data),
2192 &card->info.func_level, 2);
2193 memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &card->info.ddev_devno, 2);
2194 memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &addr, 2);
2195 }
2196
2197 static int qeth_idx_activate_read_channel(struct qeth_card *card)
2198 {
2199 struct qeth_channel *channel = &card->read;
2200 struct qeth_cmd_buffer *iob;
2201 int rc;
2202
2203 QETH_CARD_TEXT(card, 2, "idxread");
2204
2205 iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
2206 if (!iob)
2207 return -ENOMEM;
2208
2209 memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE);
2210 qeth_idx_setup_activate_cmd(card, iob);
2211 iob->callback = qeth_idx_activate_read_channel_cb;
2212
2213 rc = qeth_send_control_data(card, iob, NULL, NULL);
2214 if (rc)
2215 return rc;
2216
2217 channel->state = CH_STATE_UP;
2218 return 0;
2219 }
2220
2221 static int qeth_idx_activate_write_channel(struct qeth_card *card)
2222 {
2223 struct qeth_channel *channel = &card->write;
2224 struct qeth_cmd_buffer *iob;
2225 int rc;
2226
2227 QETH_CARD_TEXT(card, 2, "idxwrite");
2228
2229 iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
2230 if (!iob)
2231 return -ENOMEM;
2232
2233 memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE);
2234 qeth_idx_setup_activate_cmd(card, iob);
2235 iob->callback = qeth_idx_activate_write_channel_cb;
2236
2237 rc = qeth_send_control_data(card, iob, NULL, NULL);
2238 if (rc)
2239 return rc;
2240
2241 channel->state = CH_STATE_UP;
2242 return 0;
2243 }
2244
2245 static int qeth_cm_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2246 unsigned long data)
2247 {
2248 struct qeth_cmd_buffer *iob;
2249
2250 QETH_CARD_TEXT(card, 2, "cmenblcb");
2251
2252 iob = (struct qeth_cmd_buffer *) data;
2253 memcpy(&card->token.cm_filter_r,
2254 QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data),
2255 QETH_MPC_TOKEN_LENGTH);
2256 return 0;
2257 }
2258
2259 static int qeth_cm_enable(struct qeth_card *card)
2260 {
2261 struct qeth_cmd_buffer *iob;
2262
2263 QETH_CARD_TEXT(card, 2, "cmenable");
2264
2265 iob = qeth_mpc_alloc_cmd(card, CM_ENABLE, CM_ENABLE_SIZE);
2266 if (!iob)
2267 return -ENOMEM;
2268
2269 memcpy(QETH_CM_ENABLE_ISSUER_RM_TOKEN(iob->data),
2270 &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2271 memcpy(QETH_CM_ENABLE_FILTER_TOKEN(iob->data),
2272 &card->token.cm_filter_w, QETH_MPC_TOKEN_LENGTH);
2273
2274 return qeth_send_control_data(card, iob, qeth_cm_enable_cb, NULL);
2275 }
2276
2277 static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2278 unsigned long data)
2279 {
2280 struct qeth_cmd_buffer *iob;
2281
2282 QETH_CARD_TEXT(card, 2, "cmsetpcb");
2283
2284 iob = (struct qeth_cmd_buffer *) data;
2285 memcpy(&card->token.cm_connection_r,
2286 QETH_CM_SETUP_RESP_DEST_ADDR(iob->data),
2287 QETH_MPC_TOKEN_LENGTH);
2288 return 0;
2289 }
2290
2291 static int qeth_cm_setup(struct qeth_card *card)
2292 {
2293 struct qeth_cmd_buffer *iob;
2294
2295 QETH_CARD_TEXT(card, 2, "cmsetup");
2296
2297 iob = qeth_mpc_alloc_cmd(card, CM_SETUP, CM_SETUP_SIZE);
2298 if (!iob)
2299 return -ENOMEM;
2300
2301 memcpy(QETH_CM_SETUP_DEST_ADDR(iob->data),
2302 &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2303 memcpy(QETH_CM_SETUP_CONNECTION_TOKEN(iob->data),
2304 &card->token.cm_connection_w, QETH_MPC_TOKEN_LENGTH);
2305 memcpy(QETH_CM_SETUP_FILTER_TOKEN(iob->data),
2306 &card->token.cm_filter_r, QETH_MPC_TOKEN_LENGTH);
2307 return qeth_send_control_data(card, iob, qeth_cm_setup_cb, NULL);
2308 }
2309
2310 static bool qeth_is_supported_link_type(struct qeth_card *card, u8 link_type)
2311 {
2312 if (link_type == QETH_LINK_TYPE_LANE_TR ||
2313 link_type == QETH_LINK_TYPE_HSTR) {
2314 dev_err(&card->gdev->dev, "Unsupported Token Ring device\n");
2315 return false;
2316 }
2317
2318 return true;
2319 }
2320
2321 static int qeth_update_max_mtu(struct qeth_card *card, unsigned int max_mtu)
2322 {
2323 struct net_device *dev = card->dev;
2324 unsigned int new_mtu;
2325
2326 if (!max_mtu) {
2327 /* IQD needs accurate max MTU to set up its RX buffers: */
2328 if (IS_IQD(card))
2329 return -EINVAL;
2330 /* tolerate quirky HW: */
2331 max_mtu = ETH_MAX_MTU;
2332 }
2333
2334 rtnl_lock();
2335 if (IS_IQD(card)) {
2336 /* move any device with default MTU to new max MTU: */
2337 new_mtu = (dev->mtu == dev->max_mtu) ? max_mtu : dev->mtu;
2338
2339 /* adjust RX buffer size to new max MTU: */
2340 card->qdio.in_buf_size = max_mtu + 2 * PAGE_SIZE;
2341 if (dev->max_mtu && dev->max_mtu != max_mtu)
2342 qeth_free_qdio_queues(card);
2343 } else {
2344 if (dev->mtu)
2345 new_mtu = dev->mtu;
2346 /* default MTUs for first setup: */
2347 else if (IS_LAYER2(card))
2348 new_mtu = ETH_DATA_LEN;
2349 else
2350 new_mtu = ETH_DATA_LEN - 8; /* allow for LLC + SNAP */
2351 }
2352
2353 dev->max_mtu = max_mtu;
2354 dev->mtu = min(new_mtu, max_mtu);
2355 rtnl_unlock();
2356 return 0;
2357 }
2358
2359 static int qeth_get_mtu_outof_framesize(int framesize)
2360 {
2361 switch (framesize) {
2362 case 0x4000:
2363 return 8192;
2364 case 0x6000:
2365 return 16384;
2366 case 0xa000:
2367 return 32768;
2368 case 0xffff:
2369 return 57344;
2370 default:
2371 return 0;
2372 }
2373 }
2374
2375 static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2376 unsigned long data)
2377 {
2378 __u16 mtu, framesize;
2379 __u16 len;
2380 struct qeth_cmd_buffer *iob;
2381 u8 link_type = 0;
2382
2383 QETH_CARD_TEXT(card, 2, "ulpenacb");
2384
2385 iob = (struct qeth_cmd_buffer *) data;
2386 memcpy(&card->token.ulp_filter_r,
2387 QETH_ULP_ENABLE_RESP_FILTER_TOKEN(iob->data),
2388 QETH_MPC_TOKEN_LENGTH);
2389 if (IS_IQD(card)) {
2390 memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2);
2391 mtu = qeth_get_mtu_outof_framesize(framesize);
2392 } else {
2393 mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data);
2394 }
2395 *(u16 *)reply->param = mtu;
2396
2397 memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2);
2398 if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) {
2399 memcpy(&link_type,
2400 QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1);
2401 if (!qeth_is_supported_link_type(card, link_type))
2402 return -EPROTONOSUPPORT;
2403 }
2404
2405 card->info.link_type = link_type;
2406 QETH_CARD_TEXT_(card, 2, "link%d", card->info.link_type);
2407 return 0;
2408 }
2409
2410 static u8 qeth_mpc_select_prot_type(struct qeth_card *card)
2411 {
2412 return IS_LAYER2(card) ? QETH_MPC_PROT_L2 : QETH_MPC_PROT_L3;
2413 }
2414
2415 static int qeth_ulp_enable(struct qeth_card *card)
2416 {
2417 u8 prot_type = qeth_mpc_select_prot_type(card);
2418 struct qeth_cmd_buffer *iob;
2419 u16 max_mtu;
2420 int rc;
2421
2422 QETH_CARD_TEXT(card, 2, "ulpenabl");
2423
2424 iob = qeth_mpc_alloc_cmd(card, ULP_ENABLE, ULP_ENABLE_SIZE);
2425 if (!iob)
2426 return -ENOMEM;
2427
2428 *(QETH_ULP_ENABLE_LINKNUM(iob->data)) = (u8) card->dev->dev_port;
2429 memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1);
2430 memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data),
2431 &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2432 memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data),
2433 &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH);
2434 rc = qeth_send_control_data(card, iob, qeth_ulp_enable_cb, &max_mtu);
2435 if (rc)
2436 return rc;
2437 return qeth_update_max_mtu(card, max_mtu);
2438 }
2439
2440 static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2441 unsigned long data)
2442 {
2443 struct qeth_cmd_buffer *iob;
2444
2445 QETH_CARD_TEXT(card, 2, "ulpstpcb");
2446
2447 iob = (struct qeth_cmd_buffer *) data;
2448 memcpy(&card->token.ulp_connection_r,
2449 QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2450 QETH_MPC_TOKEN_LENGTH);
2451 if (!strncmp("00S", QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2452 3)) {
2453 QETH_CARD_TEXT(card, 2, "olmlimit");
2454 dev_err(&card->gdev->dev, "A connection could not be "
2455 "established because of an OLM limit\n");
2456 return -EMLINK;
2457 }
2458 return 0;
2459 }
2460
2461 static int qeth_ulp_setup(struct qeth_card *card)
2462 {
2463 __u16 temp;
2464 struct qeth_cmd_buffer *iob;
2465
2466 QETH_CARD_TEXT(card, 2, "ulpsetup");
2467
2468 iob = qeth_mpc_alloc_cmd(card, ULP_SETUP, ULP_SETUP_SIZE);
2469 if (!iob)
2470 return -ENOMEM;
2471
2472 memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data),
2473 &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2474 memcpy(QETH_ULP_SETUP_CONNECTION_TOKEN(iob->data),
2475 &card->token.ulp_connection_w, QETH_MPC_TOKEN_LENGTH);
2476 memcpy(QETH_ULP_SETUP_FILTER_TOKEN(iob->data),
2477 &card->token.ulp_filter_r, QETH_MPC_TOKEN_LENGTH);
2478
2479 memcpy(QETH_ULP_SETUP_CUA(iob->data), &card->info.ddev_devno, 2);
2480 temp = (card->info.cula << 8) + card->info.unit_addr2;
2481 memcpy(QETH_ULP_SETUP_REAL_DEVADDR(iob->data), &temp, 2);
2482 return qeth_send_control_data(card, iob, qeth_ulp_setup_cb, NULL);
2483 }
2484
2485 static int qeth_alloc_out_buf(struct qeth_qdio_out_q *q, unsigned int bidx,
2486 gfp_t gfp)
2487 {
2488 struct qeth_qdio_out_buffer *newbuf;
2489
2490 newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, gfp);
2491 if (!newbuf)
2492 return -ENOMEM;
2493
2494 newbuf->buffer = q->qdio_bufs[bidx];
2495 skb_queue_head_init(&newbuf->skb_list);
2496 lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key);
2497 atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY);
2498 q->bufs[bidx] = newbuf;
2499 return 0;
2500 }
2501
2502 static void qeth_free_output_queue(struct qeth_qdio_out_q *q)
2503 {
2504 if (!q)
2505 return;
2506
2507 qeth_drain_output_queue(q, true);
2508 qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2509 kfree(q);
2510 }
2511
2512 static struct qeth_qdio_out_q *qeth_alloc_output_queue(void)
2513 {
2514 struct qeth_qdio_out_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
2515 unsigned int i;
2516
2517 if (!q)
2518 return NULL;
2519
2520 if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q))
2521 goto err_qdio_bufs;
2522
2523 for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) {
2524 if (qeth_alloc_out_buf(q, i, GFP_KERNEL))
2525 goto err_out_bufs;
2526 }
2527
2528 return q;
2529
2530 err_out_bufs:
2531 while (i > 0)
2532 qeth_free_out_buf(q->bufs[--i]);
2533 qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2534 err_qdio_bufs:
2535 kfree(q);
2536 return NULL;
2537 }
2538
2539 static void qeth_tx_completion_timer(struct timer_list *timer)
2540 {
2541 struct qeth_qdio_out_q *queue = from_timer(queue, timer, timer);
2542
2543 napi_schedule(&queue->napi);
2544 QETH_TXQ_STAT_INC(queue, completion_timer);
2545 }
2546
2547 static int qeth_alloc_qdio_queues(struct qeth_card *card)
2548 {
2549 unsigned int i;
2550
2551 QETH_CARD_TEXT(card, 2, "allcqdbf");
2552
2553 if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED,
2554 QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED)
2555 return 0;
2556
2557 /* inbound buffer pool */
2558 if (qeth_alloc_buffer_pool(card))
2559 goto out_buffer_pool;
2560
2561 /* outbound */
2562 for (i = 0; i < card->qdio.no_out_queues; ++i) {
2563 struct qeth_qdio_out_q *queue;
2564
2565 queue = qeth_alloc_output_queue();
2566 if (!queue)
2567 goto out_freeoutq;
2568 QETH_CARD_TEXT_(card, 2, "outq %i", i);
2569 QETH_CARD_HEX(card, 2, &queue, sizeof(void *));
2570 card->qdio.out_qs[i] = queue;
2571 queue->card = card;
2572 queue->queue_no = i;
2573 INIT_LIST_HEAD(&queue->pending_bufs);
2574 spin_lock_init(&queue->lock);
2575 timer_setup(&queue->timer, qeth_tx_completion_timer, 0);
2576 if (IS_IQD(card)) {
2577 queue->coalesce_usecs = QETH_TX_COALESCE_USECS;
2578 queue->max_coalesced_frames = QETH_TX_MAX_COALESCED_FRAMES;
2579 queue->rescan_usecs = QETH_TX_TIMER_USECS;
2580 } else {
2581 queue->coalesce_usecs = USEC_PER_SEC;
2582 queue->max_coalesced_frames = 0;
2583 queue->rescan_usecs = 10 * USEC_PER_SEC;
2584 }
2585 queue->priority = QETH_QIB_PQUE_PRIO_DEFAULT;
2586 }
2587
2588 /* completion */
2589 if (qeth_alloc_cq(card))
2590 goto out_freeoutq;
2591
2592 return 0;
2593
2594 out_freeoutq:
2595 while (i > 0) {
2596 qeth_free_output_queue(card->qdio.out_qs[--i]);
2597 card->qdio.out_qs[i] = NULL;
2598 }
2599 qeth_free_buffer_pool(card);
2600 out_buffer_pool:
2601 atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
2602 return -ENOMEM;
2603 }
2604
2605 static void qeth_free_qdio_queues(struct qeth_card *card)
2606 {
2607 int i, j;
2608
2609 if (atomic_xchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED) ==
2610 QETH_QDIO_UNINITIALIZED)
2611 return;
2612
2613 qeth_free_cq(card);
2614 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2615 if (card->qdio.in_q->bufs[j].rx_skb) {
2616 consume_skb(card->qdio.in_q->bufs[j].rx_skb);
2617 card->qdio.in_q->bufs[j].rx_skb = NULL;
2618 }
2619 }
2620
2621 /* inbound buffer pool */
2622 qeth_free_buffer_pool(card);
2623 /* free outbound qdio_qs */
2624 for (i = 0; i < card->qdio.no_out_queues; i++) {
2625 qeth_free_output_queue(card->qdio.out_qs[i]);
2626 card->qdio.out_qs[i] = NULL;
2627 }
2628 }
2629
2630 static void qeth_fill_qib_parms(struct qeth_card *card,
2631 struct qeth_qib_parms *parms)
2632 {
2633 struct qeth_qdio_out_q *queue;
2634 unsigned int i;
2635
2636 parms->pcit_magic[0] = 'P';
2637 parms->pcit_magic[1] = 'C';
2638 parms->pcit_magic[2] = 'I';
2639 parms->pcit_magic[3] = 'T';
2640 ASCEBC(parms->pcit_magic, sizeof(parms->pcit_magic));
2641 parms->pcit_a = QETH_PCI_THRESHOLD_A(card);
2642 parms->pcit_b = QETH_PCI_THRESHOLD_B(card);
2643 parms->pcit_c = QETH_PCI_TIMER_VALUE(card);
2644
2645 parms->blkt_magic[0] = 'B';
2646 parms->blkt_magic[1] = 'L';
2647 parms->blkt_magic[2] = 'K';
2648 parms->blkt_magic[3] = 'T';
2649 ASCEBC(parms->blkt_magic, sizeof(parms->blkt_magic));
2650 parms->blkt_total = card->info.blkt.time_total;
2651 parms->blkt_inter_packet = card->info.blkt.inter_packet;
2652 parms->blkt_inter_packet_jumbo = card->info.blkt.inter_packet_jumbo;
2653
2654 /* Prio-queueing implicitly uses the default priorities: */
2655 if (qeth_uses_tx_prio_queueing(card) || card->qdio.no_out_queues == 1)
2656 return;
2657
2658 parms->pque_magic[0] = 'P';
2659 parms->pque_magic[1] = 'Q';
2660 parms->pque_magic[2] = 'U';
2661 parms->pque_magic[3] = 'E';
2662 ASCEBC(parms->pque_magic, sizeof(parms->pque_magic));
2663 parms->pque_order = QETH_QIB_PQUE_ORDER_RR;
2664 parms->pque_units = QETH_QIB_PQUE_UNITS_SBAL;
2665
2666 qeth_for_each_output_queue(card, queue, i)
2667 parms->pque_priority[i] = queue->priority;
2668 }
2669
2670 static int qeth_qdio_activate(struct qeth_card *card)
2671 {
2672 QETH_CARD_TEXT(card, 3, "qdioact");
2673 return qdio_activate(CARD_DDEV(card));
2674 }
2675
2676 static int qeth_dm_act(struct qeth_card *card)
2677 {
2678 struct qeth_cmd_buffer *iob;
2679
2680 QETH_CARD_TEXT(card, 2, "dmact");
2681
2682 iob = qeth_mpc_alloc_cmd(card, DM_ACT, DM_ACT_SIZE);
2683 if (!iob)
2684 return -ENOMEM;
2685
2686 memcpy(QETH_DM_ACT_DEST_ADDR(iob->data),
2687 &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2688 memcpy(QETH_DM_ACT_CONNECTION_TOKEN(iob->data),
2689 &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2690 return qeth_send_control_data(card, iob, NULL, NULL);
2691 }
2692
2693 static int qeth_mpc_initialize(struct qeth_card *card)
2694 {
2695 int rc;
2696
2697 QETH_CARD_TEXT(card, 2, "mpcinit");
2698
2699 rc = qeth_issue_next_read(card);
2700 if (rc) {
2701 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
2702 return rc;
2703 }
2704 rc = qeth_cm_enable(card);
2705 if (rc) {
2706 QETH_CARD_TEXT_(card, 2, "2err%d", rc);
2707 return rc;
2708 }
2709 rc = qeth_cm_setup(card);
2710 if (rc) {
2711 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
2712 return rc;
2713 }
2714 rc = qeth_ulp_enable(card);
2715 if (rc) {
2716 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
2717 return rc;
2718 }
2719 rc = qeth_ulp_setup(card);
2720 if (rc) {
2721 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2722 return rc;
2723 }
2724 rc = qeth_alloc_qdio_queues(card);
2725 if (rc) {
2726 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2727 return rc;
2728 }
2729 rc = qeth_qdio_establish(card);
2730 if (rc) {
2731 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
2732 qeth_free_qdio_queues(card);
2733 return rc;
2734 }
2735 rc = qeth_qdio_activate(card);
2736 if (rc) {
2737 QETH_CARD_TEXT_(card, 2, "7err%d", rc);
2738 return rc;
2739 }
2740 rc = qeth_dm_act(card);
2741 if (rc) {
2742 QETH_CARD_TEXT_(card, 2, "8err%d", rc);
2743 return rc;
2744 }
2745
2746 return 0;
2747 }
2748
2749 static void qeth_print_status_message(struct qeth_card *card)
2750 {
2751 switch (card->info.type) {
2752 case QETH_CARD_TYPE_OSD:
2753 case QETH_CARD_TYPE_OSM:
2754 case QETH_CARD_TYPE_OSX:
2755 /* VM will use a non-zero first character
2756 * to indicate a HiperSockets like reporting
2757 * of the level OSA sets the first character to zero
2758 * */
2759 if (!card->info.mcl_level[0]) {
2760 sprintf(card->info.mcl_level, "%02x%02x",
2761 card->info.mcl_level[2],
2762 card->info.mcl_level[3]);
2763 break;
2764 }
2765 fallthrough;
2766 case QETH_CARD_TYPE_IQD:
2767 if (IS_VM_NIC(card) || (card->info.mcl_level[0] & 0x80)) {
2768 card->info.mcl_level[0] = (char) _ebcasc[(__u8)
2769 card->info.mcl_level[0]];
2770 card->info.mcl_level[1] = (char) _ebcasc[(__u8)
2771 card->info.mcl_level[1]];
2772 card->info.mcl_level[2] = (char) _ebcasc[(__u8)
2773 card->info.mcl_level[2]];
2774 card->info.mcl_level[3] = (char) _ebcasc[(__u8)
2775 card->info.mcl_level[3]];
2776 card->info.mcl_level[QETH_MCL_LENGTH] = 0;
2777 }
2778 break;
2779 default:
2780 memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1);
2781 }
2782 dev_info(&card->gdev->dev,
2783 "Device is a%s card%s%s%s\nwith link type %s.\n",
2784 qeth_get_cardname(card),
2785 (card->info.mcl_level[0]) ? " (level: " : "",
2786 (card->info.mcl_level[0]) ? card->info.mcl_level : "",
2787 (card->info.mcl_level[0]) ? ")" : "",
2788 qeth_get_cardname_short(card));
2789 }
2790
2791 static void qeth_initialize_working_pool_list(struct qeth_card *card)
2792 {
2793 struct qeth_buffer_pool_entry *entry;
2794
2795 QETH_CARD_TEXT(card, 5, "inwrklst");
2796
2797 list_for_each_entry(entry,
2798 &card->qdio.init_pool.entry_list, init_list) {
2799 qeth_put_buffer_pool_entry(card, entry);
2800 }
2801 }
2802
2803 static struct qeth_buffer_pool_entry *qeth_find_free_buffer_pool_entry(
2804 struct qeth_card *card)
2805 {
2806 struct qeth_buffer_pool_entry *entry;
2807 int i, free;
2808
2809 if (list_empty(&card->qdio.in_buf_pool.entry_list))
2810 return NULL;
2811
2812 list_for_each_entry(entry, &card->qdio.in_buf_pool.entry_list, list) {
2813 free = 1;
2814 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2815 if (page_count(entry->elements[i]) > 1) {
2816 free = 0;
2817 break;
2818 }
2819 }
2820 if (free) {
2821 list_del_init(&entry->list);
2822 return entry;
2823 }
2824 }
2825
2826 /* no free buffer in pool so take first one and swap pages */
2827 entry = list_first_entry(&card->qdio.in_buf_pool.entry_list,
2828 struct qeth_buffer_pool_entry, list);
2829 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2830 if (page_count(entry->elements[i]) > 1) {
2831 struct page *page = dev_alloc_page();
2832
2833 if (!page)
2834 return NULL;
2835
2836 __free_page(entry->elements[i]);
2837 entry->elements[i] = page;
2838 QETH_CARD_STAT_INC(card, rx_sg_alloc_page);
2839 }
2840 }
2841 list_del_init(&entry->list);
2842 return entry;
2843 }
2844
2845 static int qeth_init_input_buffer(struct qeth_card *card,
2846 struct qeth_qdio_buffer *buf)
2847 {
2848 struct qeth_buffer_pool_entry *pool_entry = buf->pool_entry;
2849 int i;
2850
2851 if ((card->options.cq == QETH_CQ_ENABLED) && (!buf->rx_skb)) {
2852 buf->rx_skb = netdev_alloc_skb(card->dev,
2853 ETH_HLEN +
2854 sizeof(struct ipv6hdr));
2855 if (!buf->rx_skb)
2856 return -ENOMEM;
2857 }
2858
2859 if (!pool_entry) {
2860 pool_entry = qeth_find_free_buffer_pool_entry(card);
2861 if (!pool_entry)
2862 return -ENOBUFS;
2863
2864 buf->pool_entry = pool_entry;
2865 }
2866
2867 /*
2868 * since the buffer is accessed only from the input_tasklet
2869 * there shouldn't be a need to synchronize; also, since we use
2870 * the QETH_IN_BUF_REQUEUE_THRESHOLD we should never run out off
2871 * buffers
2872 */
2873 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2874 buf->buffer->element[i].length = PAGE_SIZE;
2875 buf->buffer->element[i].addr =
2876 page_to_phys(pool_entry->elements[i]);
2877 if (i == QETH_MAX_BUFFER_ELEMENTS(card) - 1)
2878 buf->buffer->element[i].eflags = SBAL_EFLAGS_LAST_ENTRY;
2879 else
2880 buf->buffer->element[i].eflags = 0;
2881 buf->buffer->element[i].sflags = 0;
2882 }
2883 return 0;
2884 }
2885
2886 static unsigned int qeth_tx_select_bulk_max(struct qeth_card *card,
2887 struct qeth_qdio_out_q *queue)
2888 {
2889 if (!IS_IQD(card) ||
2890 qeth_iqd_is_mcast_queue(card, queue) ||
2891 card->options.cq == QETH_CQ_ENABLED ||
2892 qdio_get_ssqd_desc(CARD_DDEV(card), &card->ssqd))
2893 return 1;
2894
2895 return card->ssqd.mmwc ? card->ssqd.mmwc : 1;
2896 }
2897
2898 static int qeth_init_qdio_queues(struct qeth_card *card)
2899 {
2900 unsigned int rx_bufs = card->qdio.in_buf_pool.buf_count;
2901 unsigned int i;
2902 int rc;
2903
2904 QETH_CARD_TEXT(card, 2, "initqdqs");
2905
2906 /* inbound queue */
2907 qdio_reset_buffers(card->qdio.in_q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2908 memset(&card->rx, 0, sizeof(struct qeth_rx));
2909
2910 qeth_initialize_working_pool_list(card);
2911 /*give only as many buffers to hardware as we have buffer pool entries*/
2912 for (i = 0; i < rx_bufs; i++) {
2913 rc = qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]);
2914 if (rc)
2915 return rc;
2916 }
2917
2918 card->qdio.in_q->next_buf_to_init = QDIO_BUFNR(rx_bufs);
2919 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0, 0, rx_bufs,
2920 NULL);
2921 if (rc) {
2922 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
2923 return rc;
2924 }
2925
2926 /* completion */
2927 rc = qeth_cq_init(card);
2928 if (rc) {
2929 return rc;
2930 }
2931
2932 /* outbound queue */
2933 for (i = 0; i < card->qdio.no_out_queues; ++i) {
2934 struct qeth_qdio_out_q *queue = card->qdio.out_qs[i];
2935
2936 qdio_reset_buffers(queue->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2937 queue->max_elements = QETH_MAX_BUFFER_ELEMENTS(card);
2938 queue->next_buf_to_fill = 0;
2939 queue->do_pack = 0;
2940 queue->prev_hdr = NULL;
2941 queue->coalesced_frames = 0;
2942 queue->bulk_start = 0;
2943 queue->bulk_count = 0;
2944 queue->bulk_max = qeth_tx_select_bulk_max(card, queue);
2945 atomic_set(&queue->used_buffers, 0);
2946 atomic_set(&queue->set_pci_flags_count, 0);
2947 netdev_tx_reset_queue(netdev_get_tx_queue(card->dev, i));
2948 }
2949 return 0;
2950 }
2951
2952 static void qeth_ipa_finalize_cmd(struct qeth_card *card,
2953 struct qeth_cmd_buffer *iob)
2954 {
2955 qeth_mpc_finalize_cmd(card, iob);
2956
2957 /* override with IPA-specific values: */
2958 __ipa_cmd(iob)->hdr.seqno = card->seqno.ipa++;
2959 }
2960
2961 static void qeth_prepare_ipa_cmd(struct qeth_card *card,
2962 struct qeth_cmd_buffer *iob, u16 cmd_length)
2963 {
2964 u8 prot_type = qeth_mpc_select_prot_type(card);
2965 u16 total_length = iob->length;
2966
2967 qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, total_length,
2968 iob->data);
2969 iob->finalize = qeth_ipa_finalize_cmd;
2970
2971 memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
2972 memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &total_length, 2);
2973 memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1);
2974 memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &cmd_length, 2);
2975 memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &cmd_length, 2);
2976 memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
2977 &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2978 memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &cmd_length, 2);
2979 }
2980
2981 static bool qeth_ipa_match_reply(struct qeth_cmd_buffer *iob,
2982 struct qeth_cmd_buffer *reply)
2983 {
2984 struct qeth_ipa_cmd *ipa_reply = __ipa_reply(reply);
2985
2986 return ipa_reply && (__ipa_cmd(iob)->hdr.seqno == ipa_reply->hdr.seqno);
2987 }
2988
2989 struct qeth_cmd_buffer *qeth_ipa_alloc_cmd(struct qeth_card *card,
2990 enum qeth_ipa_cmds cmd_code,
2991 enum qeth_prot_versions prot,
2992 unsigned int data_length)
2993 {
2994 struct qeth_cmd_buffer *iob;
2995 struct qeth_ipacmd_hdr *hdr;
2996
2997 data_length += offsetof(struct qeth_ipa_cmd, data);
2998 iob = qeth_alloc_cmd(&card->write, IPA_PDU_HEADER_SIZE + data_length, 1,
2999 QETH_IPA_TIMEOUT);
3000 if (!iob)
3001 return NULL;
3002
3003 qeth_prepare_ipa_cmd(card, iob, data_length);
3004 iob->match = qeth_ipa_match_reply;
3005
3006 hdr = &__ipa_cmd(iob)->hdr;
3007 hdr->command = cmd_code;
3008 hdr->initiator = IPA_CMD_INITIATOR_HOST;
3009 /* hdr->seqno is set by qeth_send_control_data() */
3010 hdr->adapter_type = QETH_LINK_TYPE_FAST_ETH;
3011 hdr->rel_adapter_no = (u8) card->dev->dev_port;
3012 hdr->prim_version_no = IS_LAYER2(card) ? 2 : 1;
3013 hdr->param_count = 1;
3014 hdr->prot_version = prot;
3015 return iob;
3016 }
3017 EXPORT_SYMBOL_GPL(qeth_ipa_alloc_cmd);
3018
3019 static int qeth_send_ipa_cmd_cb(struct qeth_card *card,
3020 struct qeth_reply *reply, unsigned long data)
3021 {
3022 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3023
3024 return (cmd->hdr.return_code) ? -EIO : 0;
3025 }
3026
3027 /*
3028 * qeth_send_ipa_cmd() - send an IPA command
3029 *
3030 * See qeth_send_control_data() for explanation of the arguments.
3031 */
3032
3033 int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
3034 int (*reply_cb)(struct qeth_card *, struct qeth_reply*,
3035 unsigned long),
3036 void *reply_param)
3037 {
3038 int rc;
3039
3040 QETH_CARD_TEXT(card, 4, "sendipa");
3041
3042 if (card->read_or_write_problem) {
3043 qeth_put_cmd(iob);
3044 return -EIO;
3045 }
3046
3047 if (reply_cb == NULL)
3048 reply_cb = qeth_send_ipa_cmd_cb;
3049 rc = qeth_send_control_data(card, iob, reply_cb, reply_param);
3050 if (rc == -ETIME) {
3051 qeth_clear_ipacmd_list(card);
3052 qeth_schedule_recovery(card);
3053 }
3054 return rc;
3055 }
3056 EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd);
3057
3058 static int qeth_send_startlan_cb(struct qeth_card *card,
3059 struct qeth_reply *reply, unsigned long data)
3060 {
3061 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3062
3063 if (cmd->hdr.return_code == IPA_RC_LAN_OFFLINE)
3064 return -ENETDOWN;
3065
3066 return (cmd->hdr.return_code) ? -EIO : 0;
3067 }
3068
3069 static int qeth_send_startlan(struct qeth_card *card)
3070 {
3071 struct qeth_cmd_buffer *iob;
3072
3073 QETH_CARD_TEXT(card, 2, "strtlan");
3074
3075 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_STARTLAN, QETH_PROT_NONE, 0);
3076 if (!iob)
3077 return -ENOMEM;
3078 return qeth_send_ipa_cmd(card, iob, qeth_send_startlan_cb, NULL);
3079 }
3080
3081 static int qeth_setadpparms_inspect_rc(struct qeth_ipa_cmd *cmd)
3082 {
3083 if (!cmd->hdr.return_code)
3084 cmd->hdr.return_code =
3085 cmd->data.setadapterparms.hdr.return_code;
3086 return cmd->hdr.return_code;
3087 }
3088
3089 static int qeth_query_setadapterparms_cb(struct qeth_card *card,
3090 struct qeth_reply *reply, unsigned long data)
3091 {
3092 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3093 struct qeth_query_cmds_supp *query_cmd;
3094
3095 QETH_CARD_TEXT(card, 3, "quyadpcb");
3096 if (qeth_setadpparms_inspect_rc(cmd))
3097 return -EIO;
3098
3099 query_cmd = &cmd->data.setadapterparms.data.query_cmds_supp;
3100 if (query_cmd->lan_type & 0x7f) {
3101 if (!qeth_is_supported_link_type(card, query_cmd->lan_type))
3102 return -EPROTONOSUPPORT;
3103
3104 card->info.link_type = query_cmd->lan_type;
3105 QETH_CARD_TEXT_(card, 2, "lnk %d", card->info.link_type);
3106 }
3107
3108 card->options.adp.supported = query_cmd->supported_cmds;
3109 return 0;
3110 }
3111
3112 static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card,
3113 enum qeth_ipa_setadp_cmd adp_cmd,
3114 unsigned int data_length)
3115 {
3116 struct qeth_ipacmd_setadpparms_hdr *hdr;
3117 struct qeth_cmd_buffer *iob;
3118
3119 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETADAPTERPARMS, QETH_PROT_IPV4,
3120 data_length +
3121 offsetof(struct qeth_ipacmd_setadpparms,
3122 data));
3123 if (!iob)
3124 return NULL;
3125
3126 hdr = &__ipa_cmd(iob)->data.setadapterparms.hdr;
3127 hdr->cmdlength = sizeof(*hdr) + data_length;
3128 hdr->command_code = adp_cmd;
3129 hdr->used_total = 1;
3130 hdr->seq_no = 1;
3131 return iob;
3132 }
3133
3134 static int qeth_query_setadapterparms(struct qeth_card *card)
3135 {
3136 int rc;
3137 struct qeth_cmd_buffer *iob;
3138
3139 QETH_CARD_TEXT(card, 3, "queryadp");
3140 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_COMMANDS_SUPPORTED,
3141 SETADP_DATA_SIZEOF(query_cmds_supp));
3142 if (!iob)
3143 return -ENOMEM;
3144 rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL);
3145 return rc;
3146 }
3147
3148 static int qeth_query_ipassists_cb(struct qeth_card *card,
3149 struct qeth_reply *reply, unsigned long data)
3150 {
3151 struct qeth_ipa_cmd *cmd;
3152
3153 QETH_CARD_TEXT(card, 2, "qipasscb");
3154
3155 cmd = (struct qeth_ipa_cmd *) data;
3156
3157 switch (cmd->hdr.return_code) {
3158 case IPA_RC_SUCCESS:
3159 break;
3160 case IPA_RC_NOTSUPP:
3161 case IPA_RC_L2_UNSUPPORTED_CMD:
3162 QETH_CARD_TEXT(card, 2, "ipaunsup");
3163 card->options.ipa4.supported |= IPA_SETADAPTERPARMS;
3164 card->options.ipa6.supported |= IPA_SETADAPTERPARMS;
3165 return -EOPNOTSUPP;
3166 default:
3167 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Unhandled rc=%#x\n",
3168 CARD_DEVID(card), cmd->hdr.return_code);
3169 return -EIO;
3170 }
3171
3172 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
3173 card->options.ipa4 = cmd->hdr.assists;
3174 else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
3175 card->options.ipa6 = cmd->hdr.assists;
3176 else
3177 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Flawed LIC detected\n",
3178 CARD_DEVID(card));
3179 return 0;
3180 }
3181
3182 static int qeth_query_ipassists(struct qeth_card *card,
3183 enum qeth_prot_versions prot)
3184 {
3185 int rc;
3186 struct qeth_cmd_buffer *iob;
3187
3188 QETH_CARD_TEXT_(card, 2, "qipassi%i", prot);
3189 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_QIPASSIST, prot, 0);
3190 if (!iob)
3191 return -ENOMEM;
3192 rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL);
3193 return rc;
3194 }
3195
3196 static int qeth_query_switch_attributes_cb(struct qeth_card *card,
3197 struct qeth_reply *reply, unsigned long data)
3198 {
3199 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3200 struct qeth_query_switch_attributes *attrs;
3201 struct qeth_switch_info *sw_info;
3202
3203 QETH_CARD_TEXT(card, 2, "qswiatcb");
3204 if (qeth_setadpparms_inspect_rc(cmd))
3205 return -EIO;
3206
3207 sw_info = (struct qeth_switch_info *)reply->param;
3208 attrs = &cmd->data.setadapterparms.data.query_switch_attributes;
3209 sw_info->capabilities = attrs->capabilities;
3210 sw_info->settings = attrs->settings;
3211 QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities,
3212 sw_info->settings);
3213 return 0;
3214 }
3215
3216 int qeth_query_switch_attributes(struct qeth_card *card,
3217 struct qeth_switch_info *sw_info)
3218 {
3219 struct qeth_cmd_buffer *iob;
3220
3221 QETH_CARD_TEXT(card, 2, "qswiattr");
3222 if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES))
3223 return -EOPNOTSUPP;
3224 if (!netif_carrier_ok(card->dev))
3225 return -ENOMEDIUM;
3226 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES, 0);
3227 if (!iob)
3228 return -ENOMEM;
3229 return qeth_send_ipa_cmd(card, iob,
3230 qeth_query_switch_attributes_cb, sw_info);
3231 }
3232
3233 struct qeth_cmd_buffer *qeth_get_diag_cmd(struct qeth_card *card,
3234 enum qeth_diags_cmds sub_cmd,
3235 unsigned int data_length)
3236 {
3237 struct qeth_ipacmd_diagass *cmd;
3238 struct qeth_cmd_buffer *iob;
3239
3240 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SET_DIAG_ASS, QETH_PROT_NONE,
3241 DIAG_HDR_LEN + data_length);
3242 if (!iob)
3243 return NULL;
3244
3245 cmd = &__ipa_cmd(iob)->data.diagass;
3246 cmd->subcmd_len = DIAG_SUB_HDR_LEN + data_length;
3247 cmd->subcmd = sub_cmd;
3248 return iob;
3249 }
3250 EXPORT_SYMBOL_GPL(qeth_get_diag_cmd);
3251
3252 static int qeth_query_setdiagass_cb(struct qeth_card *card,
3253 struct qeth_reply *reply, unsigned long data)
3254 {
3255 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3256 u16 rc = cmd->hdr.return_code;
3257
3258 if (rc) {
3259 QETH_CARD_TEXT_(card, 2, "diagq:%x", rc);
3260 return -EIO;
3261 }
3262
3263 card->info.diagass_support = cmd->data.diagass.ext;
3264 return 0;
3265 }
3266
3267 static int qeth_query_setdiagass(struct qeth_card *card)
3268 {
3269 struct qeth_cmd_buffer *iob;
3270
3271 QETH_CARD_TEXT(card, 2, "qdiagass");
3272 iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_QUERY, 0);
3273 if (!iob)
3274 return -ENOMEM;
3275 return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL);
3276 }
3277
3278 static void qeth_get_trap_id(struct qeth_card *card, struct qeth_trap_id *tid)
3279 {
3280 unsigned long info = get_zeroed_page(GFP_KERNEL);
3281 struct sysinfo_2_2_2 *info222 = (struct sysinfo_2_2_2 *)info;
3282 struct sysinfo_3_2_2 *info322 = (struct sysinfo_3_2_2 *)info;
3283 struct ccw_dev_id ccwid;
3284 int level;
3285
3286 tid->chpid = card->info.chpid;
3287 ccw_device_get_id(CARD_RDEV(card), &ccwid);
3288 tid->ssid = ccwid.ssid;
3289 tid->devno = ccwid.devno;
3290 if (!info)
3291 return;
3292 level = stsi(NULL, 0, 0, 0);
3293 if ((level >= 2) && (stsi(info222, 2, 2, 2) == 0))
3294 tid->lparnr = info222->lpar_number;
3295 if ((level >= 3) && (stsi(info322, 3, 2, 2) == 0)) {
3296 EBCASC(info322->vm[0].name, sizeof(info322->vm[0].name));
3297 memcpy(tid->vmname, info322->vm[0].name, sizeof(tid->vmname));
3298 }
3299 free_page(info);
3300 }
3301
3302 static int qeth_hw_trap_cb(struct qeth_card *card,
3303 struct qeth_reply *reply, unsigned long data)
3304 {
3305 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3306 u16 rc = cmd->hdr.return_code;
3307
3308 if (rc) {
3309 QETH_CARD_TEXT_(card, 2, "trapc:%x", rc);
3310 return -EIO;
3311 }
3312 return 0;
3313 }
3314
3315 int qeth_hw_trap(struct qeth_card *card, enum qeth_diags_trap_action action)
3316 {
3317 struct qeth_cmd_buffer *iob;
3318 struct qeth_ipa_cmd *cmd;
3319
3320 QETH_CARD_TEXT(card, 2, "diagtrap");
3321 iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_TRAP, 64);
3322 if (!iob)
3323 return -ENOMEM;
3324 cmd = __ipa_cmd(iob);
3325 cmd->data.diagass.type = 1;
3326 cmd->data.diagass.action = action;
3327 switch (action) {
3328 case QETH_DIAGS_TRAP_ARM:
3329 cmd->data.diagass.options = 0x0003;
3330 cmd->data.diagass.ext = 0x00010000 +
3331 sizeof(struct qeth_trap_id);
3332 qeth_get_trap_id(card,
3333 (struct qeth_trap_id *)cmd->data.diagass.cdata);
3334 break;
3335 case QETH_DIAGS_TRAP_DISARM:
3336 cmd->data.diagass.options = 0x0001;
3337 break;
3338 case QETH_DIAGS_TRAP_CAPTURE:
3339 break;
3340 }
3341 return qeth_send_ipa_cmd(card, iob, qeth_hw_trap_cb, NULL);
3342 }
3343
3344 static int qeth_check_qdio_errors(struct qeth_card *card,
3345 struct qdio_buffer *buf,
3346 unsigned int qdio_error,
3347 const char *dbftext)
3348 {
3349 if (qdio_error) {
3350 QETH_CARD_TEXT(card, 2, dbftext);
3351 QETH_CARD_TEXT_(card, 2, " F15=%02X",
3352 buf->element[15].sflags);
3353 QETH_CARD_TEXT_(card, 2, " F14=%02X",
3354 buf->element[14].sflags);
3355 QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error);
3356 if ((buf->element[15].sflags) == 0x12) {
3357 QETH_CARD_STAT_INC(card, rx_fifo_errors);
3358 return 0;
3359 } else
3360 return 1;
3361 }
3362 return 0;
3363 }
3364
3365 static unsigned int qeth_rx_refill_queue(struct qeth_card *card,
3366 unsigned int count)
3367 {
3368 struct qeth_qdio_q *queue = card->qdio.in_q;
3369 struct list_head *lh;
3370 int i;
3371 int rc;
3372 int newcount = 0;
3373
3374 /* only requeue at a certain threshold to avoid SIGAs */
3375 if (count >= QETH_IN_BUF_REQUEUE_THRESHOLD(card)) {
3376 for (i = queue->next_buf_to_init;
3377 i < queue->next_buf_to_init + count; ++i) {
3378 if (qeth_init_input_buffer(card,
3379 &queue->bufs[QDIO_BUFNR(i)])) {
3380 break;
3381 } else {
3382 newcount++;
3383 }
3384 }
3385
3386 if (newcount < count) {
3387 /* we are in memory shortage so we switch back to
3388 traditional skb allocation and drop packages */
3389 atomic_set(&card->force_alloc_skb, 3);
3390 count = newcount;
3391 } else {
3392 atomic_add_unless(&card->force_alloc_skb, -1, 0);
3393 }
3394
3395 if (!count) {
3396 i = 0;
3397 list_for_each(lh, &card->qdio.in_buf_pool.entry_list)
3398 i++;
3399 if (i == card->qdio.in_buf_pool.buf_count) {
3400 QETH_CARD_TEXT(card, 2, "qsarbw");
3401 schedule_delayed_work(
3402 &card->buffer_reclaim_work,
3403 QETH_RECLAIM_WORK_TIME);
3404 }
3405 return 0;
3406 }
3407
3408 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0,
3409 queue->next_buf_to_init, count, NULL);
3410 if (rc) {
3411 QETH_CARD_TEXT(card, 2, "qinberr");
3412 }
3413 queue->next_buf_to_init = QDIO_BUFNR(queue->next_buf_to_init +
3414 count);
3415 return count;
3416 }
3417
3418 return 0;
3419 }
3420
3421 static void qeth_buffer_reclaim_work(struct work_struct *work)
3422 {
3423 struct qeth_card *card = container_of(to_delayed_work(work),
3424 struct qeth_card,
3425 buffer_reclaim_work);
3426
3427 local_bh_disable();
3428 napi_schedule(&card->napi);
3429 /* kick-start the NAPI softirq: */
3430 local_bh_enable();
3431 }
3432
3433 static void qeth_handle_send_error(struct qeth_card *card,
3434 struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err)
3435 {
3436 int sbalf15 = buffer->buffer->element[15].sflags;
3437
3438 QETH_CARD_TEXT(card, 6, "hdsnderr");
3439 qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr");
3440
3441 if (!qdio_err)
3442 return;
3443
3444 if ((sbalf15 >= 15) && (sbalf15 <= 31))
3445 return;
3446
3447 QETH_CARD_TEXT(card, 1, "lnkfail");
3448 QETH_CARD_TEXT_(card, 1, "%04x %02x",
3449 (u16)qdio_err, (u8)sbalf15);
3450 }
3451
3452 /**
3453 * qeth_prep_flush_pack_buffer - Prepares flushing of a packing buffer.
3454 * @queue: queue to check for packing buffer
3455 *
3456 * Returns number of buffers that were prepared for flush.
3457 */
3458 static int qeth_prep_flush_pack_buffer(struct qeth_qdio_out_q *queue)
3459 {
3460 struct qeth_qdio_out_buffer *buffer;
3461
3462 buffer = queue->bufs[queue->next_buf_to_fill];
3463 if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) &&
3464 (buffer->next_element_to_fill > 0)) {
3465 /* it's a packing buffer */
3466 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3467 queue->next_buf_to_fill =
3468 QDIO_BUFNR(queue->next_buf_to_fill + 1);
3469 return 1;
3470 }
3471 return 0;
3472 }
3473
3474 /*
3475 * Switched to packing state if the number of used buffers on a queue
3476 * reaches a certain limit.
3477 */
3478 static void qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q *queue)
3479 {
3480 if (!queue->do_pack) {
3481 if (atomic_read(&queue->used_buffers)
3482 >= QETH_HIGH_WATERMARK_PACK){
3483 /* switch non-PACKING -> PACKING */
3484 QETH_CARD_TEXT(queue->card, 6, "np->pack");
3485 QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3486 queue->do_pack = 1;
3487 }
3488 }
3489 }
3490
3491 /*
3492 * Switches from packing to non-packing mode. If there is a packing
3493 * buffer on the queue this buffer will be prepared to be flushed.
3494 * In that case 1 is returned to inform the caller. If no buffer
3495 * has to be flushed, zero is returned.
3496 */
3497 static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue)
3498 {
3499 if (queue->do_pack) {
3500 if (atomic_read(&queue->used_buffers)
3501 <= QETH_LOW_WATERMARK_PACK) {
3502 /* switch PACKING -> non-PACKING */
3503 QETH_CARD_TEXT(queue->card, 6, "pack->np");
3504 QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3505 queue->do_pack = 0;
3506 return qeth_prep_flush_pack_buffer(queue);
3507 }
3508 }
3509 return 0;
3510 }
3511
3512 static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
3513 int count)
3514 {
3515 struct qeth_qdio_out_buffer *buf = queue->bufs[index];
3516 struct qeth_card *card = queue->card;
3517 unsigned int frames, usecs;
3518 struct qaob *aob = NULL;
3519 int rc;
3520 int i;
3521
3522 for (i = index; i < index + count; ++i) {
3523 unsigned int bidx = QDIO_BUFNR(i);
3524 struct sk_buff *skb;
3525
3526 buf = queue->bufs[bidx];
3527 buf->buffer->element[buf->next_element_to_fill - 1].eflags |=
3528 SBAL_EFLAGS_LAST_ENTRY;
3529 queue->coalesced_frames += buf->frames;
3530
3531 if (IS_IQD(card)) {
3532 skb_queue_walk(&buf->skb_list, skb)
3533 skb_tx_timestamp(skb);
3534 }
3535 }
3536
3537 if (IS_IQD(card)) {
3538 if (card->options.cq == QETH_CQ_ENABLED &&
3539 !qeth_iqd_is_mcast_queue(card, queue) &&
3540 count == 1) {
3541 if (!buf->aob)
3542 buf->aob = kmem_cache_zalloc(qeth_qaob_cache,
3543 GFP_ATOMIC);
3544 if (buf->aob) {
3545 struct qeth_qaob_priv1 *priv;
3546
3547 aob = buf->aob;
3548 priv = (struct qeth_qaob_priv1 *)&aob->user1;
3549 priv->state = QETH_QAOB_ISSUED;
3550 priv->queue_no = queue->queue_no;
3551 }
3552 }
3553 } else {
3554 if (!queue->do_pack) {
3555 if ((atomic_read(&queue->used_buffers) >=
3556 (QETH_HIGH_WATERMARK_PACK -
3557 QETH_WATERMARK_PACK_FUZZ)) &&
3558 !atomic_read(&queue->set_pci_flags_count)) {
3559 /* it's likely that we'll go to packing
3560 * mode soon */
3561 atomic_inc(&queue->set_pci_flags_count);
3562 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3563 }
3564 } else {
3565 if (!atomic_read(&queue->set_pci_flags_count)) {
3566 /*
3567 * there's no outstanding PCI any more, so we
3568 * have to request a PCI to be sure the the PCI
3569 * will wake at some time in the future then we
3570 * can flush packed buffers that might still be
3571 * hanging around, which can happen if no
3572 * further send was requested by the stack
3573 */
3574 atomic_inc(&queue->set_pci_flags_count);
3575 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3576 }
3577 }
3578 }
3579
3580 QETH_TXQ_STAT_INC(queue, doorbell);
3581 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_OUTPUT, queue->queue_no,
3582 index, count, aob);
3583
3584 switch (rc) {
3585 case 0:
3586 case -ENOBUFS:
3587 /* ignore temporary SIGA errors without busy condition */
3588
3589 /* Fake the TX completion interrupt: */
3590 frames = READ_ONCE(queue->max_coalesced_frames);
3591 usecs = READ_ONCE(queue->coalesce_usecs);
3592
3593 if (frames && queue->coalesced_frames >= frames) {
3594 napi_schedule(&queue->napi);
3595 queue->coalesced_frames = 0;
3596 QETH_TXQ_STAT_INC(queue, coal_frames);
3597 } else if (qeth_use_tx_irqs(card) &&
3598 atomic_read(&queue->used_buffers) >= 32) {
3599 /* Old behaviour carried over from the qdio layer: */
3600 napi_schedule(&queue->napi);
3601 QETH_TXQ_STAT_INC(queue, coal_frames);
3602 } else if (usecs) {
3603 qeth_tx_arm_timer(queue, usecs);
3604 }
3605
3606 break;
3607 default:
3608 QETH_CARD_TEXT(queue->card, 2, "flushbuf");
3609 QETH_CARD_TEXT_(queue->card, 2, " q%d", queue->queue_no);
3610 QETH_CARD_TEXT_(queue->card, 2, " idx%d", index);
3611 QETH_CARD_TEXT_(queue->card, 2, " c%d", count);
3612 QETH_CARD_TEXT_(queue->card, 2, " err%d", rc);
3613
3614 /* this must not happen under normal circumstances. if it
3615 * happens something is really wrong -> recover */
3616 qeth_schedule_recovery(queue->card);
3617 }
3618 }
3619
3620 static void qeth_flush_queue(struct qeth_qdio_out_q *queue)
3621 {
3622 qeth_flush_buffers(queue, queue->bulk_start, queue->bulk_count);
3623
3624 queue->bulk_start = QDIO_BUFNR(queue->bulk_start + queue->bulk_count);
3625 queue->prev_hdr = NULL;
3626 queue->bulk_count = 0;
3627 }
3628
3629 static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue)
3630 {
3631 /*
3632 * check if weed have to switch to non-packing mode or if
3633 * we have to get a pci flag out on the queue
3634 */
3635 if ((atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) ||
3636 !atomic_read(&queue->set_pci_flags_count)) {
3637 unsigned int index, flush_cnt;
3638 bool q_was_packing;
3639
3640 spin_lock(&queue->lock);
3641
3642 index = queue->next_buf_to_fill;
3643 q_was_packing = queue->do_pack;
3644
3645 flush_cnt = qeth_switch_to_nonpacking_if_needed(queue);
3646 if (!flush_cnt && !atomic_read(&queue->set_pci_flags_count))
3647 flush_cnt = qeth_prep_flush_pack_buffer(queue);
3648
3649 if (flush_cnt) {
3650 qeth_flush_buffers(queue, index, flush_cnt);
3651 if (q_was_packing)
3652 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_cnt);
3653 }
3654
3655 spin_unlock(&queue->lock);
3656 }
3657 }
3658
3659 static void qeth_qdio_poll(struct ccw_device *cdev, unsigned long card_ptr)
3660 {
3661 struct qeth_card *card = (struct qeth_card *)card_ptr;
3662
3663 napi_schedule_irqoff(&card->napi);
3664 }
3665
3666 int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq)
3667 {
3668 int rc;
3669
3670 if (card->options.cq == QETH_CQ_NOTAVAILABLE) {
3671 rc = -1;
3672 goto out;
3673 } else {
3674 if (card->options.cq == cq) {
3675 rc = 0;
3676 goto out;
3677 }
3678
3679 qeth_free_qdio_queues(card);
3680 card->options.cq = cq;
3681 rc = 0;
3682 }
3683 out:
3684 return rc;
3685
3686 }
3687 EXPORT_SYMBOL_GPL(qeth_configure_cq);
3688
3689 static void qeth_qdio_handle_aob(struct qeth_card *card, struct qaob *aob)
3690 {
3691 struct qeth_qaob_priv1 *priv = (struct qeth_qaob_priv1 *)&aob->user1;
3692 unsigned int queue_no = priv->queue_no;
3693
3694 BUILD_BUG_ON(sizeof(*priv) > ARRAY_SIZE(aob->user1));
3695
3696 if (xchg(&priv->state, QETH_QAOB_DONE) == QETH_QAOB_PENDING &&
3697 queue_no < card->qdio.no_out_queues)
3698 napi_schedule(&card->qdio.out_qs[queue_no]->napi);
3699 }
3700
3701 static void qeth_qdio_cq_handler(struct qeth_card *card, unsigned int qdio_err,
3702 unsigned int queue, int first_element,
3703 int count)
3704 {
3705 struct qeth_qdio_q *cq = card->qdio.c_q;
3706 int i;
3707 int rc;
3708
3709 QETH_CARD_TEXT_(card, 5, "qcqhe%d", first_element);
3710 QETH_CARD_TEXT_(card, 5, "qcqhc%d", count);
3711 QETH_CARD_TEXT_(card, 5, "qcqherr%d", qdio_err);
3712
3713 if (qdio_err) {
3714 netif_tx_stop_all_queues(card->dev);
3715 qeth_schedule_recovery(card);
3716 return;
3717 }
3718
3719 for (i = first_element; i < first_element + count; ++i) {
3720 struct qdio_buffer *buffer = cq->qdio_bufs[QDIO_BUFNR(i)];
3721 int e = 0;
3722
3723 while ((e < QDIO_MAX_ELEMENTS_PER_BUFFER) &&
3724 buffer->element[e].addr) {
3725 unsigned long phys_aob_addr = buffer->element[e].addr;
3726
3727 qeth_qdio_handle_aob(card, phys_to_virt(phys_aob_addr));
3728 ++e;
3729 }
3730 qeth_scrub_qdio_buffer(buffer, QDIO_MAX_ELEMENTS_PER_BUFFER);
3731 }
3732 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, queue,
3733 cq->next_buf_to_init, count, NULL);
3734 if (rc) {
3735 dev_warn(&card->gdev->dev,
3736 "QDIO reported an error, rc=%i\n", rc);
3737 QETH_CARD_TEXT(card, 2, "qcqherr");
3738 }
3739
3740 cq->next_buf_to_init = QDIO_BUFNR(cq->next_buf_to_init + count);
3741 }
3742
3743 static void qeth_qdio_input_handler(struct ccw_device *ccwdev,
3744 unsigned int qdio_err, int queue,
3745 int first_elem, int count,
3746 unsigned long card_ptr)
3747 {
3748 struct qeth_card *card = (struct qeth_card *)card_ptr;
3749
3750 QETH_CARD_TEXT_(card, 2, "qihq%d", queue);
3751 QETH_CARD_TEXT_(card, 2, "qiec%d", qdio_err);
3752
3753 if (qdio_err)
3754 qeth_schedule_recovery(card);
3755 }
3756
3757 static void qeth_qdio_output_handler(struct ccw_device *ccwdev,
3758 unsigned int qdio_error, int __queue,
3759 int first_element, int count,
3760 unsigned long card_ptr)
3761 {
3762 struct qeth_card *card = (struct qeth_card *) card_ptr;
3763
3764 QETH_CARD_TEXT(card, 2, "achkcond");
3765 netif_tx_stop_all_queues(card->dev);
3766 qeth_schedule_recovery(card);
3767 }
3768
3769 /*
3770 * Note: Function assumes that we have 4 outbound queues.
3771 */
3772 int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb)
3773 {
3774 struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
3775 u8 tos;
3776
3777 switch (card->qdio.do_prio_queueing) {
3778 case QETH_PRIO_Q_ING_TOS:
3779 case QETH_PRIO_Q_ING_PREC:
3780 switch (vlan_get_protocol(skb)) {
3781 case htons(ETH_P_IP):
3782 tos = ipv4_get_dsfield(ip_hdr(skb));
3783 break;
3784 case htons(ETH_P_IPV6):
3785 tos = ipv6_get_dsfield(ipv6_hdr(skb));
3786 break;
3787 default:
3788 return card->qdio.default_out_queue;
3789 }
3790 if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC)
3791 return ~tos >> 6 & 3;
3792 if (tos & IPTOS_MINCOST)
3793 return 3;
3794 if (tos & IPTOS_RELIABILITY)
3795 return 2;
3796 if (tos & IPTOS_THROUGHPUT)
3797 return 1;
3798 if (tos & IPTOS_LOWDELAY)
3799 return 0;
3800 break;
3801 case QETH_PRIO_Q_ING_SKB:
3802 if (skb->priority > 5)
3803 return 0;
3804 return ~skb->priority >> 1 & 3;
3805 case QETH_PRIO_Q_ING_VLAN:
3806 if (veth->h_vlan_proto == htons(ETH_P_8021Q))
3807 return ~ntohs(veth->h_vlan_TCI) >>
3808 (VLAN_PRIO_SHIFT + 1) & 3;
3809 break;
3810 case QETH_PRIO_Q_ING_FIXED:
3811 return card->qdio.default_out_queue;
3812 default:
3813 break;
3814 }
3815 return card->qdio.default_out_queue;
3816 }
3817 EXPORT_SYMBOL_GPL(qeth_get_priority_queue);
3818
3819 /**
3820 * qeth_get_elements_for_frags() - find number of SBALEs for skb frags.
3821 * @skb: SKB address
3822 *
3823 * Returns the number of pages, and thus QDIO buffer elements, needed to cover
3824 * fragmented part of the SKB. Returns zero for linear SKB.
3825 */
3826 static int qeth_get_elements_for_frags(struct sk_buff *skb)
3827 {
3828 int cnt, elements = 0;
3829
3830 for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3831 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
3832
3833 elements += qeth_get_elements_for_range(
3834 (addr_t)skb_frag_address(frag),
3835 (addr_t)skb_frag_address(frag) + skb_frag_size(frag));
3836 }
3837 return elements;
3838 }
3839
3840 /**
3841 * qeth_count_elements() - Counts the number of QDIO buffer elements needed
3842 * to transmit an skb.
3843 * @skb: the skb to operate on.
3844 * @data_offset: skip this part of the skb's linear data
3845 *
3846 * Returns the number of pages, and thus QDIO buffer elements, needed to map the
3847 * skb's data (both its linear part and paged fragments).
3848 */
3849 static unsigned int qeth_count_elements(struct sk_buff *skb,
3850 unsigned int data_offset)
3851 {
3852 unsigned int elements = qeth_get_elements_for_frags(skb);
3853 addr_t end = (addr_t)skb->data + skb_headlen(skb);
3854 addr_t start = (addr_t)skb->data + data_offset;
3855
3856 if (start != end)
3857 elements += qeth_get_elements_for_range(start, end);
3858 return elements;
3859 }
3860
3861 #define QETH_HDR_CACHE_OBJ_SIZE (sizeof(struct qeth_hdr_tso) + \
3862 MAX_TCP_HEADER)
3863
3864 /**
3865 * qeth_add_hw_header() - add a HW header to an skb.
3866 * @queue: TX queue that the skb will be placed on.
3867 * @skb: skb that the HW header should be added to.
3868 * @hdr: double pointer to a qeth_hdr. When returning with >= 0,
3869 * it contains a valid pointer to a qeth_hdr.
3870 * @hdr_len: length of the HW header.
3871 * @proto_len: length of protocol headers that need to be in same page as the
3872 * HW header.
3873 * @elements: returns the required number of buffer elements for this skb.
3874 *
3875 * Returns the pushed length. If the header can't be pushed on
3876 * (eg. because it would cross a page boundary), it is allocated from
3877 * the cache instead and 0 is returned.
3878 * The number of needed buffer elements is returned in @elements.
3879 * Error to create the hdr is indicated by returning with < 0.
3880 */
3881 static int qeth_add_hw_header(struct qeth_qdio_out_q *queue,
3882 struct sk_buff *skb, struct qeth_hdr **hdr,
3883 unsigned int hdr_len, unsigned int proto_len,
3884 unsigned int *elements)
3885 {
3886 gfp_t gfp = GFP_ATOMIC | (skb_pfmemalloc(skb) ? __GFP_MEMALLOC : 0);
3887 const unsigned int contiguous = proto_len ? proto_len : 1;
3888 const unsigned int max_elements = queue->max_elements;
3889 unsigned int __elements;
3890 addr_t start, end;
3891 bool push_ok;
3892 int rc;
3893
3894 check_layout:
3895 start = (addr_t)skb->data - hdr_len;
3896 end = (addr_t)skb->data;
3897
3898 if (qeth_get_elements_for_range(start, end + contiguous) == 1) {
3899 /* Push HW header into same page as first protocol header. */
3900 push_ok = true;
3901 /* ... but TSO always needs a separate element for headers: */
3902 if (skb_is_gso(skb))
3903 __elements = 1 + qeth_count_elements(skb, proto_len);
3904 else
3905 __elements = qeth_count_elements(skb, 0);
3906 } else if (!proto_len && PAGE_ALIGNED(skb->data)) {
3907 /* Push HW header into preceding page, flush with skb->data. */
3908 push_ok = true;
3909 __elements = 1 + qeth_count_elements(skb, 0);
3910 } else {
3911 /* Use header cache, copy protocol headers up. */
3912 push_ok = false;
3913 __elements = 1 + qeth_count_elements(skb, proto_len);
3914 }
3915
3916 /* Compress skb to fit into one IO buffer: */
3917 if (__elements > max_elements) {
3918 if (!skb_is_nonlinear(skb)) {
3919 /* Drop it, no easy way of shrinking it further. */
3920 QETH_DBF_MESSAGE(2, "Dropped an oversized skb (Max Elements=%u / Actual=%u / Length=%u).\n",
3921 max_elements, __elements, skb->len);
3922 return -E2BIG;
3923 }
3924
3925 rc = skb_linearize(skb);
3926 if (rc) {
3927 QETH_TXQ_STAT_INC(queue, skbs_linearized_fail);
3928 return rc;
3929 }
3930
3931 QETH_TXQ_STAT_INC(queue, skbs_linearized);
3932 /* Linearization changed the layout, re-evaluate: */
3933 goto check_layout;
3934 }
3935
3936 *elements = __elements;
3937 /* Add the header: */
3938 if (push_ok) {
3939 *hdr = skb_push(skb, hdr_len);
3940 return hdr_len;
3941 }
3942
3943 /* Fall back to cache element with known-good alignment: */
3944 if (hdr_len + proto_len > QETH_HDR_CACHE_OBJ_SIZE)
3945 return -E2BIG;
3946 *hdr = kmem_cache_alloc(qeth_core_header_cache, gfp);
3947 if (!*hdr)
3948 return -ENOMEM;
3949 /* Copy protocol headers behind HW header: */
3950 skb_copy_from_linear_data(skb, ((char *)*hdr) + hdr_len, proto_len);
3951 return 0;
3952 }
3953
3954 static bool qeth_iqd_may_bulk(struct qeth_qdio_out_q *queue,
3955 struct sk_buff *curr_skb,
3956 struct qeth_hdr *curr_hdr)
3957 {
3958 struct qeth_qdio_out_buffer *buffer = queue->bufs[queue->bulk_start];
3959 struct qeth_hdr *prev_hdr = queue->prev_hdr;
3960
3961 if (!prev_hdr)
3962 return true;
3963
3964 /* All packets must have the same target: */
3965 if (curr_hdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER2) {
3966 struct sk_buff *prev_skb = skb_peek(&buffer->skb_list);
3967
3968 return ether_addr_equal(eth_hdr(prev_skb)->h_dest,
3969 eth_hdr(curr_skb)->h_dest) &&
3970 qeth_l2_same_vlan(&prev_hdr->hdr.l2, &curr_hdr->hdr.l2);
3971 }
3972
3973 return qeth_l3_same_next_hop(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3) &&
3974 qeth_l3_iqd_same_vlan(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3);
3975 }
3976
3977 /**
3978 * qeth_fill_buffer() - map skb into an output buffer
3979 * @buf: buffer to transport the skb
3980 * @skb: skb to map into the buffer
3981 * @hdr: qeth_hdr for this skb. Either at skb->data, or allocated
3982 * from qeth_core_header_cache.
3983 * @offset: when mapping the skb, start at skb->data + offset
3984 * @hd_len: if > 0, build a dedicated header element of this size
3985 */
3986 static unsigned int qeth_fill_buffer(struct qeth_qdio_out_buffer *buf,
3987 struct sk_buff *skb, struct qeth_hdr *hdr,
3988 unsigned int offset, unsigned int hd_len)
3989 {
3990 struct qdio_buffer *buffer = buf->buffer;
3991 int element = buf->next_element_to_fill;
3992 int length = skb_headlen(skb) - offset;
3993 char *data = skb->data + offset;
3994 unsigned int elem_length, cnt;
3995 bool is_first_elem = true;
3996
3997 __skb_queue_tail(&buf->skb_list, skb);
3998
3999 /* build dedicated element for HW Header */
4000 if (hd_len) {
4001 is_first_elem = false;
4002
4003 buffer->element[element].addr = virt_to_phys(hdr);
4004 buffer->element[element].length = hd_len;
4005 buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
4006
4007 /* HW header is allocated from cache: */
4008 if ((void *)hdr != skb->data)
4009 __set_bit(element, buf->from_kmem_cache);
4010 /* HW header was pushed and is contiguous with linear part: */
4011 else if (length > 0 && !PAGE_ALIGNED(data) &&
4012 (data == (char *)hdr + hd_len))
4013 buffer->element[element].eflags |=
4014 SBAL_EFLAGS_CONTIGUOUS;
4015
4016 element++;
4017 }
4018
4019 /* map linear part into buffer element(s) */
4020 while (length > 0) {
4021 elem_length = min_t(unsigned int, length,
4022 PAGE_SIZE - offset_in_page(data));
4023
4024 buffer->element[element].addr = virt_to_phys(data);
4025 buffer->element[element].length = elem_length;
4026 length -= elem_length;
4027 if (is_first_elem) {
4028 is_first_elem = false;
4029 if (length || skb_is_nonlinear(skb))
4030 /* skb needs additional elements */
4031 buffer->element[element].eflags =
4032 SBAL_EFLAGS_FIRST_FRAG;
4033 else
4034 buffer->element[element].eflags = 0;
4035 } else {
4036 buffer->element[element].eflags =
4037 SBAL_EFLAGS_MIDDLE_FRAG;
4038 }
4039
4040 data += elem_length;
4041 element++;
4042 }
4043
4044 /* map page frags into buffer element(s) */
4045 for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
4046 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
4047
4048 data = skb_frag_address(frag);
4049 length = skb_frag_size(frag);
4050 while (length > 0) {
4051 elem_length = min_t(unsigned int, length,
4052 PAGE_SIZE - offset_in_page(data));
4053
4054 buffer->element[element].addr = virt_to_phys(data);
4055 buffer->element[element].length = elem_length;
4056 buffer->element[element].eflags =
4057 SBAL_EFLAGS_MIDDLE_FRAG;
4058
4059 length -= elem_length;
4060 data += elem_length;
4061 element++;
4062 }
4063 }
4064
4065 if (buffer->element[element - 1].eflags)
4066 buffer->element[element - 1].eflags = SBAL_EFLAGS_LAST_FRAG;
4067 buf->next_element_to_fill = element;
4068 return element;
4069 }
4070
4071 static int __qeth_xmit(struct qeth_card *card, struct qeth_qdio_out_q *queue,
4072 struct sk_buff *skb, unsigned int elements,
4073 struct qeth_hdr *hdr, unsigned int offset,
4074 unsigned int hd_len)
4075 {
4076 unsigned int bytes = qdisc_pkt_len(skb);
4077 struct qeth_qdio_out_buffer *buffer;
4078 unsigned int next_element;
4079 struct netdev_queue *txq;
4080 bool stopped = false;
4081 bool flush;
4082
4083 buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start + queue->bulk_count)];
4084 txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
4085
4086 /* Just a sanity check, the wake/stop logic should ensure that we always
4087 * get a free buffer.
4088 */
4089 if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4090 return -EBUSY;
4091
4092 flush = !qeth_iqd_may_bulk(queue, skb, hdr);
4093
4094 if (flush ||
4095 (buffer->next_element_to_fill + elements > queue->max_elements)) {
4096 if (buffer->next_element_to_fill > 0) {
4097 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4098 queue->bulk_count++;
4099 }
4100
4101 if (queue->bulk_count >= queue->bulk_max)
4102 flush = true;
4103
4104 if (flush)
4105 qeth_flush_queue(queue);
4106
4107 buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start +
4108 queue->bulk_count)];
4109
4110 /* Sanity-check again: */
4111 if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4112 return -EBUSY;
4113 }
4114
4115 if (buffer->next_element_to_fill == 0 &&
4116 atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
4117 /* If a TX completion happens right _here_ and misses to wake
4118 * the txq, then our re-check below will catch the race.
4119 */
4120 QETH_TXQ_STAT_INC(queue, stopped);
4121 netif_tx_stop_queue(txq);
4122 stopped = true;
4123 }
4124
4125 next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
4126 buffer->bytes += bytes;
4127 buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
4128 queue->prev_hdr = hdr;
4129
4130 flush = __netdev_tx_sent_queue(txq, bytes,
4131 !stopped && netdev_xmit_more());
4132
4133 if (flush || next_element >= queue->max_elements) {
4134 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4135 queue->bulk_count++;
4136
4137 if (queue->bulk_count >= queue->bulk_max)
4138 flush = true;
4139
4140 if (flush)
4141 qeth_flush_queue(queue);
4142 }
4143
4144 if (stopped && !qeth_out_queue_is_full(queue))
4145 netif_tx_start_queue(txq);
4146 return 0;
4147 }
4148
4149 static int qeth_do_send_packet(struct qeth_card *card,
4150 struct qeth_qdio_out_q *queue,
4151 struct sk_buff *skb, struct qeth_hdr *hdr,
4152 unsigned int offset, unsigned int hd_len,
4153 unsigned int elements_needed)
4154 {
4155 unsigned int start_index = queue->next_buf_to_fill;
4156 struct qeth_qdio_out_buffer *buffer;
4157 unsigned int next_element;
4158 struct netdev_queue *txq;
4159 bool stopped = false;
4160 int flush_count = 0;
4161 int do_pack = 0;
4162 int rc = 0;
4163
4164 buffer = queue->bufs[queue->next_buf_to_fill];
4165
4166 /* Just a sanity check, the wake/stop logic should ensure that we always
4167 * get a free buffer.
4168 */
4169 if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4170 return -EBUSY;
4171
4172 txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
4173
4174 /* check if we need to switch packing state of this queue */
4175 qeth_switch_to_packing_if_needed(queue);
4176 if (queue->do_pack) {
4177 do_pack = 1;
4178 /* does packet fit in current buffer? */
4179 if (buffer->next_element_to_fill + elements_needed >
4180 queue->max_elements) {
4181 /* ... no -> set state PRIMED */
4182 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4183 flush_count++;
4184 queue->next_buf_to_fill =
4185 QDIO_BUFNR(queue->next_buf_to_fill + 1);
4186 buffer = queue->bufs[queue->next_buf_to_fill];
4187
4188 /* We stepped forward, so sanity-check again: */
4189 if (atomic_read(&buffer->state) !=
4190 QETH_QDIO_BUF_EMPTY) {
4191 qeth_flush_buffers(queue, start_index,
4192 flush_count);
4193 rc = -EBUSY;
4194 goto out;
4195 }
4196 }
4197 }
4198
4199 if (buffer->next_element_to_fill == 0 &&
4200 atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
4201 /* If a TX completion happens right _here_ and misses to wake
4202 * the txq, then our re-check below will catch the race.
4203 */
4204 QETH_TXQ_STAT_INC(queue, stopped);
4205 netif_tx_stop_queue(txq);
4206 stopped = true;
4207 }
4208
4209 next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
4210 buffer->bytes += qdisc_pkt_len(skb);
4211 buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
4212
4213 if (queue->do_pack)
4214 QETH_TXQ_STAT_INC(queue, skbs_pack);
4215 if (!queue->do_pack || stopped || next_element >= queue->max_elements) {
4216 flush_count++;
4217 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4218 queue->next_buf_to_fill =
4219 QDIO_BUFNR(queue->next_buf_to_fill + 1);
4220 }
4221
4222 if (flush_count)
4223 qeth_flush_buffers(queue, start_index, flush_count);
4224
4225 out:
4226 if (do_pack)
4227 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_count);
4228
4229 if (stopped && !qeth_out_queue_is_full(queue))
4230 netif_tx_start_queue(txq);
4231 return rc;
4232 }
4233
4234 static void qeth_fill_tso_ext(struct qeth_hdr_tso *hdr,
4235 unsigned int payload_len, struct sk_buff *skb,
4236 unsigned int proto_len)
4237 {
4238 struct qeth_hdr_ext_tso *ext = &hdr->ext;
4239
4240 ext->hdr_tot_len = sizeof(*ext);
4241 ext->imb_hdr_no = 1;
4242 ext->hdr_type = 1;
4243 ext->hdr_version = 1;
4244 ext->hdr_len = 28;
4245 ext->payload_len = payload_len;
4246 ext->mss = skb_shinfo(skb)->gso_size;
4247 ext->dg_hdr_len = proto_len;
4248 }
4249
4250 int qeth_xmit(struct qeth_card *card, struct sk_buff *skb,
4251 struct qeth_qdio_out_q *queue, __be16 proto,
4252 void (*fill_header)(struct qeth_qdio_out_q *queue,
4253 struct qeth_hdr *hdr, struct sk_buff *skb,
4254 __be16 proto, unsigned int data_len))
4255 {
4256 unsigned int proto_len, hw_hdr_len;
4257 unsigned int frame_len = skb->len;
4258 bool is_tso = skb_is_gso(skb);
4259 unsigned int data_offset = 0;
4260 struct qeth_hdr *hdr = NULL;
4261 unsigned int hd_len = 0;
4262 unsigned int elements;
4263 int push_len, rc;
4264
4265 if (is_tso) {
4266 hw_hdr_len = sizeof(struct qeth_hdr_tso);
4267 proto_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
4268 } else {
4269 hw_hdr_len = sizeof(struct qeth_hdr);
4270 proto_len = (IS_IQD(card) && IS_LAYER2(card)) ? ETH_HLEN : 0;
4271 }
4272
4273 rc = skb_cow_head(skb, hw_hdr_len);
4274 if (rc)
4275 return rc;
4276
4277 push_len = qeth_add_hw_header(queue, skb, &hdr, hw_hdr_len, proto_len,
4278 &elements);
4279 if (push_len < 0)
4280 return push_len;
4281 if (is_tso || !push_len) {
4282 /* HW header needs its own buffer element. */
4283 hd_len = hw_hdr_len + proto_len;
4284 data_offset = push_len + proto_len;
4285 }
4286 memset(hdr, 0, hw_hdr_len);
4287 fill_header(queue, hdr, skb, proto, frame_len);
4288 if (is_tso)
4289 qeth_fill_tso_ext((struct qeth_hdr_tso *) hdr,
4290 frame_len - proto_len, skb, proto_len);
4291
4292 if (IS_IQD(card)) {
4293 rc = __qeth_xmit(card, queue, skb, elements, hdr, data_offset,
4294 hd_len);
4295 } else {
4296 /* TODO: drop skb_orphan() once TX completion is fast enough */
4297 skb_orphan(skb);
4298 spin_lock(&queue->lock);
4299 rc = qeth_do_send_packet(card, queue, skb, hdr, data_offset,
4300 hd_len, elements);
4301 spin_unlock(&queue->lock);
4302 }
4303
4304 if (rc && !push_len)
4305 kmem_cache_free(qeth_core_header_cache, hdr);
4306
4307 return rc;
4308 }
4309 EXPORT_SYMBOL_GPL(qeth_xmit);
4310
4311 static int qeth_setadp_promisc_mode_cb(struct qeth_card *card,
4312 struct qeth_reply *reply, unsigned long data)
4313 {
4314 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4315 struct qeth_ipacmd_setadpparms *setparms;
4316
4317 QETH_CARD_TEXT(card, 4, "prmadpcb");
4318
4319 setparms = &(cmd->data.setadapterparms);
4320 if (qeth_setadpparms_inspect_rc(cmd)) {
4321 QETH_CARD_TEXT_(card, 4, "prmrc%x", cmd->hdr.return_code);
4322 setparms->data.mode = SET_PROMISC_MODE_OFF;
4323 }
4324 card->info.promisc_mode = setparms->data.mode;
4325 return (cmd->hdr.return_code) ? -EIO : 0;
4326 }
4327
4328 void qeth_setadp_promisc_mode(struct qeth_card *card, bool enable)
4329 {
4330 enum qeth_ipa_promisc_modes mode = enable ? SET_PROMISC_MODE_ON :
4331 SET_PROMISC_MODE_OFF;
4332 struct qeth_cmd_buffer *iob;
4333 struct qeth_ipa_cmd *cmd;
4334
4335 QETH_CARD_TEXT(card, 4, "setprom");
4336 QETH_CARD_TEXT_(card, 4, "mode:%x", mode);
4337
4338 iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE,
4339 SETADP_DATA_SIZEOF(mode));
4340 if (!iob)
4341 return;
4342 cmd = __ipa_cmd(iob);
4343 cmd->data.setadapterparms.data.mode = mode;
4344 qeth_send_ipa_cmd(card, iob, qeth_setadp_promisc_mode_cb, NULL);
4345 }
4346 EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode);
4347
4348 static int qeth_setadpparms_change_macaddr_cb(struct qeth_card *card,
4349 struct qeth_reply *reply, unsigned long data)
4350 {
4351 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4352 struct qeth_ipacmd_setadpparms *adp_cmd;
4353
4354 QETH_CARD_TEXT(card, 4, "chgmaccb");
4355 if (qeth_setadpparms_inspect_rc(cmd))
4356 return -EIO;
4357
4358 adp_cmd = &cmd->data.setadapterparms;
4359 if (!is_valid_ether_addr(adp_cmd->data.change_addr.addr))
4360 return -EADDRNOTAVAIL;
4361
4362 if (IS_LAYER2(card) && IS_OSD(card) && !IS_VM_NIC(card) &&
4363 !(adp_cmd->hdr.flags & QETH_SETADP_FLAGS_VIRTUAL_MAC))
4364 return -EADDRNOTAVAIL;
4365
4366 eth_hw_addr_set(card->dev, adp_cmd->data.change_addr.addr);
4367 return 0;
4368 }
4369
4370 int qeth_setadpparms_change_macaddr(struct qeth_card *card)
4371 {
4372 int rc;
4373 struct qeth_cmd_buffer *iob;
4374 struct qeth_ipa_cmd *cmd;
4375
4376 QETH_CARD_TEXT(card, 4, "chgmac");
4377
4378 iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS,
4379 SETADP_DATA_SIZEOF(change_addr));
4380 if (!iob)
4381 return -ENOMEM;
4382 cmd = __ipa_cmd(iob);
4383 cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC;
4384 cmd->data.setadapterparms.data.change_addr.addr_size = ETH_ALEN;
4385 ether_addr_copy(cmd->data.setadapterparms.data.change_addr.addr,
4386 card->dev->dev_addr);
4387 rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_change_macaddr_cb,
4388 NULL);
4389 return rc;
4390 }
4391 EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr);
4392
4393 static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card,
4394 struct qeth_reply *reply, unsigned long data)
4395 {
4396 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4397 struct qeth_set_access_ctrl *access_ctrl_req;
4398
4399 QETH_CARD_TEXT(card, 4, "setaccb");
4400
4401 access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4402 QETH_CARD_TEXT_(card, 2, "rc=%d",
4403 cmd->data.setadapterparms.hdr.return_code);
4404 if (cmd->data.setadapterparms.hdr.return_code !=
4405 SET_ACCESS_CTRL_RC_SUCCESS)
4406 QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%#x) on device %x: %#x\n",
4407 access_ctrl_req->subcmd_code, CARD_DEVID(card),
4408 cmd->data.setadapterparms.hdr.return_code);
4409 switch (qeth_setadpparms_inspect_rc(cmd)) {
4410 case SET_ACCESS_CTRL_RC_SUCCESS:
4411 if (access_ctrl_req->subcmd_code == ISOLATION_MODE_NONE)
4412 dev_info(&card->gdev->dev,
4413 "QDIO data connection isolation is deactivated\n");
4414 else
4415 dev_info(&card->gdev->dev,
4416 "QDIO data connection isolation is activated\n");
4417 return 0;
4418 case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
4419 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already deactivated\n",
4420 CARD_DEVID(card));
4421 return 0;
4422 case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
4423 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already activated\n",
4424 CARD_DEVID(card));
4425 return 0;
4426 case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
4427 dev_err(&card->gdev->dev, "Adapter does not "
4428 "support QDIO data connection isolation\n");
4429 return -EOPNOTSUPP;
4430 case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
4431 dev_err(&card->gdev->dev,
4432 "Adapter is dedicated. "
4433 "QDIO data connection isolation not supported\n");
4434 return -EOPNOTSUPP;
4435 case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
4436 dev_err(&card->gdev->dev,
4437 "TSO does not permit QDIO data connection isolation\n");
4438 return -EPERM;
4439 case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED:
4440 dev_err(&card->gdev->dev, "The adjacent switch port does not "
4441 "support reflective relay mode\n");
4442 return -EOPNOTSUPP;
4443 case SET_ACCESS_CTRL_RC_REFLREL_FAILED:
4444 dev_err(&card->gdev->dev, "The reflective relay mode cannot be "
4445 "enabled at the adjacent switch port");
4446 return -EREMOTEIO;
4447 case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED:
4448 dev_warn(&card->gdev->dev, "Turning off reflective relay mode "
4449 "at the adjacent switch failed\n");
4450 /* benign error while disabling ISOLATION_MODE_FWD */
4451 return 0;
4452 default:
4453 return -EIO;
4454 }
4455 }
4456
4457 int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
4458 enum qeth_ipa_isolation_modes mode)
4459 {
4460 int rc;
4461 struct qeth_cmd_buffer *iob;
4462 struct qeth_ipa_cmd *cmd;
4463 struct qeth_set_access_ctrl *access_ctrl_req;
4464
4465 QETH_CARD_TEXT(card, 4, "setacctl");
4466
4467 if (!qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
4468 dev_err(&card->gdev->dev,
4469 "Adapter does not support QDIO data connection isolation\n");
4470 return -EOPNOTSUPP;
4471 }
4472
4473 iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
4474 SETADP_DATA_SIZEOF(set_access_ctrl));
4475 if (!iob)
4476 return -ENOMEM;
4477 cmd = __ipa_cmd(iob);
4478 access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4479 access_ctrl_req->subcmd_code = mode;
4480
4481 rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb,
4482 NULL);
4483 if (rc) {
4484 QETH_CARD_TEXT_(card, 2, "rc=%d", rc);
4485 QETH_DBF_MESSAGE(3, "IPA(SET_ACCESS_CTRL(%d) on device %x: sent failed\n",
4486 rc, CARD_DEVID(card));
4487 }
4488
4489 return rc;
4490 }
4491
4492 void qeth_tx_timeout(struct net_device *dev, unsigned int txqueue)
4493 {
4494 struct qeth_card *card;
4495
4496 card = dev->ml_priv;
4497 QETH_CARD_TEXT(card, 4, "txtimeo");
4498 qeth_schedule_recovery(card);
4499 }
4500 EXPORT_SYMBOL_GPL(qeth_tx_timeout);
4501
4502 static int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum)
4503 {
4504 struct qeth_card *card = dev->ml_priv;
4505 int rc = 0;
4506
4507 switch (regnum) {
4508 case MII_BMCR: /* Basic mode control register */
4509 rc = BMCR_FULLDPLX;
4510 if ((card->info.link_type != QETH_LINK_TYPE_GBIT_ETH) &&
4511 (card->info.link_type != QETH_LINK_TYPE_10GBIT_ETH) &&
4512 (card->info.link_type != QETH_LINK_TYPE_25GBIT_ETH))
4513 rc |= BMCR_SPEED100;
4514 break;
4515 case MII_BMSR: /* Basic mode status register */
4516 rc = BMSR_ERCAP | BMSR_ANEGCOMPLETE | BMSR_LSTATUS |
4517 BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL |
4518 BMSR_100BASE4;
4519 break;
4520 case MII_PHYSID1: /* PHYS ID 1 */
4521 rc = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 8) |
4522 dev->dev_addr[2];
4523 rc = (rc >> 5) & 0xFFFF;
4524 break;
4525 case MII_PHYSID2: /* PHYS ID 2 */
4526 rc = (dev->dev_addr[2] << 10) & 0xFFFF;
4527 break;
4528 case MII_ADVERTISE: /* Advertisement control reg */
4529 rc = ADVERTISE_ALL;
4530 break;
4531 case MII_LPA: /* Link partner ability reg */
4532 rc = LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL |
4533 LPA_100BASE4 | LPA_LPACK;
4534 break;
4535 case MII_EXPANSION: /* Expansion register */
4536 break;
4537 case MII_DCOUNTER: /* disconnect counter */
4538 break;
4539 case MII_FCSCOUNTER: /* false carrier counter */
4540 break;
4541 case MII_NWAYTEST: /* N-way auto-neg test register */
4542 break;
4543 case MII_RERRCOUNTER: /* rx error counter */
4544 rc = card->stats.rx_length_errors +
4545 card->stats.rx_frame_errors +
4546 card->stats.rx_fifo_errors;
4547 break;
4548 case MII_SREVISION: /* silicon revision */
4549 break;
4550 case MII_RESV1: /* reserved 1 */
4551 break;
4552 case MII_LBRERROR: /* loopback, rx, bypass error */
4553 break;
4554 case MII_PHYADDR: /* physical address */
4555 break;
4556 case MII_RESV2: /* reserved 2 */
4557 break;
4558 case MII_TPISTATUS: /* TPI status for 10mbps */
4559 break;
4560 case MII_NCONFIG: /* network interface config */
4561 break;
4562 default:
4563 break;
4564 }
4565 return rc;
4566 }
4567
4568 static int qeth_snmp_command_cb(struct qeth_card *card,
4569 struct qeth_reply *reply, unsigned long data)
4570 {
4571 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4572 struct qeth_arp_query_info *qinfo = reply->param;
4573 struct qeth_ipacmd_setadpparms *adp_cmd;
4574 unsigned int data_len;
4575 void *snmp_data;
4576
4577 QETH_CARD_TEXT(card, 3, "snpcmdcb");
4578
4579 if (cmd->hdr.return_code) {
4580 QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code);
4581 return -EIO;
4582 }
4583 if (cmd->data.setadapterparms.hdr.return_code) {
4584 cmd->hdr.return_code =
4585 cmd->data.setadapterparms.hdr.return_code;
4586 QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code);
4587 return -EIO;
4588 }
4589
4590 adp_cmd = &cmd->data.setadapterparms;
4591 data_len = adp_cmd->hdr.cmdlength - sizeof(adp_cmd->hdr);
4592 if (adp_cmd->hdr.seq_no == 1) {
4593 snmp_data = &adp_cmd->data.snmp;
4594 } else {
4595 snmp_data = &adp_cmd->data.snmp.request;
4596 data_len -= offsetof(struct qeth_snmp_cmd, request);
4597 }
4598
4599 /* check if there is enough room in userspace */
4600 if ((qinfo->udata_len - qinfo->udata_offset) < data_len) {
4601 QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOSPC);
4602 return -ENOSPC;
4603 }
4604 QETH_CARD_TEXT_(card, 4, "snore%i",
4605 cmd->data.setadapterparms.hdr.used_total);
4606 QETH_CARD_TEXT_(card, 4, "sseqn%i",
4607 cmd->data.setadapterparms.hdr.seq_no);
4608 /*copy entries to user buffer*/
4609 memcpy(qinfo->udata + qinfo->udata_offset, snmp_data, data_len);
4610 qinfo->udata_offset += data_len;
4611
4612 if (cmd->data.setadapterparms.hdr.seq_no <
4613 cmd->data.setadapterparms.hdr.used_total)
4614 return 1;
4615 return 0;
4616 }
4617
4618 static int qeth_snmp_command(struct qeth_card *card, char __user *udata)
4619 {
4620 struct qeth_snmp_ureq __user *ureq;
4621 struct qeth_cmd_buffer *iob;
4622 unsigned int req_len;
4623 struct qeth_arp_query_info qinfo = {0, };
4624 int rc = 0;
4625
4626 QETH_CARD_TEXT(card, 3, "snmpcmd");
4627
4628 if (IS_VM_NIC(card))
4629 return -EOPNOTSUPP;
4630
4631 if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) &&
4632 IS_LAYER3(card))
4633 return -EOPNOTSUPP;
4634
4635 ureq = (struct qeth_snmp_ureq __user *) udata;
4636 if (get_user(qinfo.udata_len, &ureq->hdr.data_len) ||
4637 get_user(req_len, &ureq->hdr.req_len))
4638 return -EFAULT;
4639
4640 /* Sanitize user input, to avoid overflows in iob size calculation: */
4641 if (req_len > QETH_BUFSIZE)
4642 return -EINVAL;
4643
4644 iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL, req_len);
4645 if (!iob)
4646 return -ENOMEM;
4647
4648 if (copy_from_user(&__ipa_cmd(iob)->data.setadapterparms.data.snmp,
4649 &ureq->cmd, req_len)) {
4650 qeth_put_cmd(iob);
4651 return -EFAULT;
4652 }
4653
4654 qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
4655 if (!qinfo.udata) {
4656 qeth_put_cmd(iob);
4657 return -ENOMEM;
4658 }
4659 qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr);
4660
4661 rc = qeth_send_ipa_cmd(card, iob, qeth_snmp_command_cb, &qinfo);
4662 if (rc)
4663 QETH_DBF_MESSAGE(2, "SNMP command failed on device %x: (%#x)\n",
4664 CARD_DEVID(card), rc);
4665 else {
4666 if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
4667 rc = -EFAULT;
4668 }
4669
4670 kfree(qinfo.udata);
4671 return rc;
4672 }
4673
4674 static int qeth_setadpparms_query_oat_cb(struct qeth_card *card,
4675 struct qeth_reply *reply,
4676 unsigned long data)
4677 {
4678 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4679 struct qeth_qoat_priv *priv = reply->param;
4680 int resdatalen;
4681
4682 QETH_CARD_TEXT(card, 3, "qoatcb");
4683 if (qeth_setadpparms_inspect_rc(cmd))
4684 return -EIO;
4685
4686 resdatalen = cmd->data.setadapterparms.hdr.cmdlength;
4687
4688 if (resdatalen > (priv->buffer_len - priv->response_len))
4689 return -ENOSPC;
4690
4691 memcpy(priv->buffer + priv->response_len,
4692 &cmd->data.setadapterparms.hdr, resdatalen);
4693 priv->response_len += resdatalen;
4694
4695 if (cmd->data.setadapterparms.hdr.seq_no <
4696 cmd->data.setadapterparms.hdr.used_total)
4697 return 1;
4698 return 0;
4699 }
4700
4701 static int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
4702 {
4703 int rc = 0;
4704 struct qeth_cmd_buffer *iob;
4705 struct qeth_ipa_cmd *cmd;
4706 struct qeth_query_oat *oat_req;
4707 struct qeth_query_oat_data oat_data;
4708 struct qeth_qoat_priv priv;
4709 void __user *tmp;
4710
4711 QETH_CARD_TEXT(card, 3, "qoatcmd");
4712
4713 if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT))
4714 return -EOPNOTSUPP;
4715
4716 if (copy_from_user(&oat_data, udata, sizeof(oat_data)))
4717 return -EFAULT;
4718
4719 priv.buffer_len = oat_data.buffer_len;
4720 priv.response_len = 0;
4721 priv.buffer = vzalloc(oat_data.buffer_len);
4722 if (!priv.buffer)
4723 return -ENOMEM;
4724
4725 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4726 SETADP_DATA_SIZEOF(query_oat));
4727 if (!iob) {
4728 rc = -ENOMEM;
4729 goto out_free;
4730 }
4731 cmd = __ipa_cmd(iob);
4732 oat_req = &cmd->data.setadapterparms.data.query_oat;
4733 oat_req->subcmd_code = oat_data.command;
4734
4735 rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb, &priv);
4736 if (!rc) {
4737 tmp = is_compat_task() ? compat_ptr(oat_data.ptr) :
4738 u64_to_user_ptr(oat_data.ptr);
4739 oat_data.response_len = priv.response_len;
4740
4741 if (copy_to_user(tmp, priv.buffer, priv.response_len) ||
4742 copy_to_user(udata, &oat_data, sizeof(oat_data)))
4743 rc = -EFAULT;
4744 }
4745
4746 out_free:
4747 vfree(priv.buffer);
4748 return rc;
4749 }
4750
4751 static int qeth_query_card_info_cb(struct qeth_card *card,
4752 struct qeth_reply *reply, unsigned long data)
4753 {
4754 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4755 struct qeth_link_info *link_info = reply->param;
4756 struct qeth_query_card_info *card_info;
4757
4758 QETH_CARD_TEXT(card, 2, "qcrdincb");
4759 if (qeth_setadpparms_inspect_rc(cmd))
4760 return -EIO;
4761
4762 card_info = &cmd->data.setadapterparms.data.card_info;
4763 netdev_dbg(card->dev,
4764 "card info: card_type=0x%02x, port_mode=0x%04x, port_speed=0x%08x\n",
4765 card_info->card_type, card_info->port_mode,
4766 card_info->port_speed);
4767
4768 switch (card_info->port_mode) {
4769 case CARD_INFO_PORTM_FULLDUPLEX:
4770 link_info->duplex = DUPLEX_FULL;
4771 break;
4772 case CARD_INFO_PORTM_HALFDUPLEX:
4773 link_info->duplex = DUPLEX_HALF;
4774 break;
4775 default:
4776 link_info->duplex = DUPLEX_UNKNOWN;
4777 }
4778
4779 switch (card_info->card_type) {
4780 case CARD_INFO_TYPE_1G_COPPER_A:
4781 case CARD_INFO_TYPE_1G_COPPER_B:
4782 link_info->speed = SPEED_1000;
4783 link_info->port = PORT_TP;
4784 break;
4785 case CARD_INFO_TYPE_1G_FIBRE_A:
4786 case CARD_INFO_TYPE_1G_FIBRE_B:
4787 link_info->speed = SPEED_1000;
4788 link_info->port = PORT_FIBRE;
4789 break;
4790 case CARD_INFO_TYPE_10G_FIBRE_A:
4791 case CARD_INFO_TYPE_10G_FIBRE_B:
4792 link_info->speed = SPEED_10000;
4793 link_info->port = PORT_FIBRE;
4794 break;
4795 default:
4796 switch (card_info->port_speed) {
4797 case CARD_INFO_PORTS_10M:
4798 link_info->speed = SPEED_10;
4799 break;
4800 case CARD_INFO_PORTS_100M:
4801 link_info->speed = SPEED_100;
4802 break;
4803 case CARD_INFO_PORTS_1G:
4804 link_info->speed = SPEED_1000;
4805 break;
4806 case CARD_INFO_PORTS_10G:
4807 link_info->speed = SPEED_10000;
4808 break;
4809 case CARD_INFO_PORTS_25G:
4810 link_info->speed = SPEED_25000;
4811 break;
4812 default:
4813 link_info->speed = SPEED_UNKNOWN;
4814 }
4815
4816 link_info->port = PORT_OTHER;
4817 }
4818
4819 return 0;
4820 }
4821
4822 int qeth_query_card_info(struct qeth_card *card,
4823 struct qeth_link_info *link_info)
4824 {
4825 struct qeth_cmd_buffer *iob;
4826
4827 QETH_CARD_TEXT(card, 2, "qcrdinfo");
4828 if (!qeth_adp_supported(card, IPA_SETADP_QUERY_CARD_INFO))
4829 return -EOPNOTSUPP;
4830 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_CARD_INFO, 0);
4831 if (!iob)
4832 return -ENOMEM;
4833
4834 return qeth_send_ipa_cmd(card, iob, qeth_query_card_info_cb, link_info);
4835 }
4836
4837 static int qeth_init_link_info_oat_cb(struct qeth_card *card,
4838 struct qeth_reply *reply_priv,
4839 unsigned long data)
4840 {
4841 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4842 struct qeth_link_info *link_info = reply_priv->param;
4843 struct qeth_query_oat_physical_if *phys_if;
4844 struct qeth_query_oat_reply *reply;
4845
4846 if (qeth_setadpparms_inspect_rc(cmd))
4847 return -EIO;
4848
4849 /* Multi-part reply is unexpected, don't bother: */
4850 if (cmd->data.setadapterparms.hdr.used_total > 1)
4851 return -EINVAL;
4852
4853 /* Expect the reply to start with phys_if data: */
4854 reply = &cmd->data.setadapterparms.data.query_oat.reply[0];
4855 if (reply->type != QETH_QOAT_REPLY_TYPE_PHYS_IF ||
4856 reply->length < sizeof(*reply))
4857 return -EINVAL;
4858
4859 phys_if = &reply->phys_if;
4860
4861 switch (phys_if->speed_duplex) {
4862 case QETH_QOAT_PHYS_SPEED_10M_HALF:
4863 link_info->speed = SPEED_10;
4864 link_info->duplex = DUPLEX_HALF;
4865 break;
4866 case QETH_QOAT_PHYS_SPEED_10M_FULL:
4867 link_info->speed = SPEED_10;
4868 link_info->duplex = DUPLEX_FULL;
4869 break;
4870 case QETH_QOAT_PHYS_SPEED_100M_HALF:
4871 link_info->speed = SPEED_100;
4872 link_info->duplex = DUPLEX_HALF;
4873 break;
4874 case QETH_QOAT_PHYS_SPEED_100M_FULL:
4875 link_info->speed = SPEED_100;
4876 link_info->duplex = DUPLEX_FULL;
4877 break;
4878 case QETH_QOAT_PHYS_SPEED_1000M_HALF:
4879 link_info->speed = SPEED_1000;
4880 link_info->duplex = DUPLEX_HALF;
4881 break;
4882 case QETH_QOAT_PHYS_SPEED_1000M_FULL:
4883 link_info->speed = SPEED_1000;
4884 link_info->duplex = DUPLEX_FULL;
4885 break;
4886 case QETH_QOAT_PHYS_SPEED_10G_FULL:
4887 link_info->speed = SPEED_10000;
4888 link_info->duplex = DUPLEX_FULL;
4889 break;
4890 case QETH_QOAT_PHYS_SPEED_25G_FULL:
4891 link_info->speed = SPEED_25000;
4892 link_info->duplex = DUPLEX_FULL;
4893 break;
4894 case QETH_QOAT_PHYS_SPEED_UNKNOWN:
4895 default:
4896 link_info->speed = SPEED_UNKNOWN;
4897 link_info->duplex = DUPLEX_UNKNOWN;
4898 break;
4899 }
4900
4901 switch (phys_if->media_type) {
4902 case QETH_QOAT_PHYS_MEDIA_COPPER:
4903 link_info->port = PORT_TP;
4904 link_info->link_mode = QETH_LINK_MODE_UNKNOWN;
4905 break;
4906 case QETH_QOAT_PHYS_MEDIA_FIBRE_SHORT:
4907 link_info->port = PORT_FIBRE;
4908 link_info->link_mode = QETH_LINK_MODE_FIBRE_SHORT;
4909 break;
4910 case QETH_QOAT_PHYS_MEDIA_FIBRE_LONG:
4911 link_info->port = PORT_FIBRE;
4912 link_info->link_mode = QETH_LINK_MODE_FIBRE_LONG;
4913 break;
4914 default:
4915 link_info->port = PORT_OTHER;
4916 link_info->link_mode = QETH_LINK_MODE_UNKNOWN;
4917 break;
4918 }
4919
4920 return 0;
4921 }
4922
4923 static void qeth_init_link_info(struct qeth_card *card)
4924 {
4925 card->info.link_info.duplex = DUPLEX_FULL;
4926
4927 if (IS_IQD(card) || IS_VM_NIC(card)) {
4928 card->info.link_info.speed = SPEED_10000;
4929 card->info.link_info.port = PORT_FIBRE;
4930 card->info.link_info.link_mode = QETH_LINK_MODE_FIBRE_SHORT;
4931 } else {
4932 switch (card->info.link_type) {
4933 case QETH_LINK_TYPE_FAST_ETH:
4934 case QETH_LINK_TYPE_LANE_ETH100:
4935 card->info.link_info.speed = SPEED_100;
4936 card->info.link_info.port = PORT_TP;
4937 break;
4938 case QETH_LINK_TYPE_GBIT_ETH:
4939 case QETH_LINK_TYPE_LANE_ETH1000:
4940 card->info.link_info.speed = SPEED_1000;
4941 card->info.link_info.port = PORT_FIBRE;
4942 break;
4943 case QETH_LINK_TYPE_10GBIT_ETH:
4944 card->info.link_info.speed = SPEED_10000;
4945 card->info.link_info.port = PORT_FIBRE;
4946 break;
4947 case QETH_LINK_TYPE_25GBIT_ETH:
4948 card->info.link_info.speed = SPEED_25000;
4949 card->info.link_info.port = PORT_FIBRE;
4950 break;
4951 default:
4952 dev_info(&card->gdev->dev, "Unknown link type %x\n",
4953 card->info.link_type);
4954 card->info.link_info.speed = SPEED_UNKNOWN;
4955 card->info.link_info.port = PORT_OTHER;
4956 }
4957
4958 card->info.link_info.link_mode = QETH_LINK_MODE_UNKNOWN;
4959 }
4960
4961 /* Get more accurate data via QUERY OAT: */
4962 if (qeth_adp_supported(card, IPA_SETADP_QUERY_OAT)) {
4963 struct qeth_link_info link_info;
4964 struct qeth_cmd_buffer *iob;
4965
4966 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4967 SETADP_DATA_SIZEOF(query_oat));
4968 if (iob) {
4969 struct qeth_ipa_cmd *cmd = __ipa_cmd(iob);
4970 struct qeth_query_oat *oat_req;
4971
4972 oat_req = &cmd->data.setadapterparms.data.query_oat;
4973 oat_req->subcmd_code = QETH_QOAT_SCOPE_INTERFACE;
4974
4975 if (!qeth_send_ipa_cmd(card, iob,
4976 qeth_init_link_info_oat_cb,
4977 &link_info)) {
4978 if (link_info.speed != SPEED_UNKNOWN)
4979 card->info.link_info.speed = link_info.speed;
4980 if (link_info.duplex != DUPLEX_UNKNOWN)
4981 card->info.link_info.duplex = link_info.duplex;
4982 if (link_info.port != PORT_OTHER)
4983 card->info.link_info.port = link_info.port;
4984 if (link_info.link_mode != QETH_LINK_MODE_UNKNOWN)
4985 card->info.link_info.link_mode = link_info.link_mode;
4986 }
4987 }
4988 }
4989 }
4990
4991 /**
4992 * qeth_vm_request_mac() - Request a hypervisor-managed MAC address
4993 * @card: pointer to a qeth_card
4994 *
4995 * Returns
4996 * 0, if a MAC address has been set for the card's netdevice
4997 * a return code, for various error conditions
4998 */
4999 int qeth_vm_request_mac(struct qeth_card *card)
5000 {
5001 struct diag26c_mac_resp *response;
5002 struct diag26c_mac_req *request;
5003 int rc;
5004
5005 QETH_CARD_TEXT(card, 2, "vmreqmac");
5006
5007 request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
5008 response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
5009 if (!request || !response) {
5010 rc = -ENOMEM;
5011 goto out;
5012 }
5013
5014 request->resp_buf_len = sizeof(*response);
5015 request->resp_version = DIAG26C_VERSION2;
5016 request->op_code = DIAG26C_GET_MAC;
5017 request->devno = card->info.ddev_devno;
5018
5019 QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
5020 rc = diag26c(request, response, DIAG26C_MAC_SERVICES);
5021 QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
5022 if (rc)
5023 goto out;
5024 QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
5025
5026 if (request->resp_buf_len < sizeof(*response) ||
5027 response->version != request->resp_version) {
5028 rc = -EIO;
5029 QETH_CARD_TEXT(card, 2, "badresp");
5030 QETH_CARD_HEX(card, 2, &request->resp_buf_len,
5031 sizeof(request->resp_buf_len));
5032 } else if (!is_valid_ether_addr(response->mac)) {
5033 rc = -EINVAL;
5034 QETH_CARD_TEXT(card, 2, "badmac");
5035 QETH_CARD_HEX(card, 2, response->mac, ETH_ALEN);
5036 } else {
5037 eth_hw_addr_set(card->dev, response->mac);
5038 }
5039
5040 out:
5041 kfree(response);
5042 kfree(request);
5043 return rc;
5044 }
5045 EXPORT_SYMBOL_GPL(qeth_vm_request_mac);
5046
5047 static void qeth_determine_capabilities(struct qeth_card *card)
5048 {
5049 struct qeth_channel *channel = &card->data;
5050 struct ccw_device *ddev = channel->ccwdev;
5051 int rc;
5052 int ddev_offline = 0;
5053
5054 QETH_CARD_TEXT(card, 2, "detcapab");
5055 if (!ddev->online) {
5056 ddev_offline = 1;
5057 rc = qeth_start_channel(channel);
5058 if (rc) {
5059 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
5060 goto out;
5061 }
5062 }
5063
5064 rc = qeth_read_conf_data(card);
5065 if (rc) {
5066 QETH_DBF_MESSAGE(2, "qeth_read_conf_data on device %x returned %i\n",
5067 CARD_DEVID(card), rc);
5068 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
5069 goto out_offline;
5070 }
5071
5072 rc = qdio_get_ssqd_desc(ddev, &card->ssqd);
5073 if (rc)
5074 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
5075
5076 QETH_CARD_TEXT_(card, 2, "qfmt%d", card->ssqd.qfmt);
5077 QETH_CARD_TEXT_(card, 2, "ac1:%02x", card->ssqd.qdioac1);
5078 QETH_CARD_TEXT_(card, 2, "ac2:%04x", card->ssqd.qdioac2);
5079 QETH_CARD_TEXT_(card, 2, "ac3:%04x", card->ssqd.qdioac3);
5080 QETH_CARD_TEXT_(card, 2, "icnt%d", card->ssqd.icnt);
5081 if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) ||
5082 ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) ||
5083 ((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) {
5084 dev_info(&card->gdev->dev,
5085 "Completion Queueing supported\n");
5086 } else {
5087 card->options.cq = QETH_CQ_NOTAVAILABLE;
5088 }
5089
5090 out_offline:
5091 if (ddev_offline == 1)
5092 qeth_stop_channel(channel);
5093 out:
5094 return;
5095 }
5096
5097 static void qeth_read_ccw_conf_data(struct qeth_card *card)
5098 {
5099 struct qeth_card_info *info = &card->info;
5100 struct ccw_device *cdev = CARD_DDEV(card);
5101 struct ccw_dev_id dev_id;
5102
5103 QETH_CARD_TEXT(card, 2, "ccwconfd");
5104 ccw_device_get_id(cdev, &dev_id);
5105
5106 info->ddev_devno = dev_id.devno;
5107 info->ids_valid = !ccw_device_get_cssid(cdev, &info->cssid) &&
5108 !ccw_device_get_iid(cdev, &info->iid) &&
5109 !ccw_device_get_chid(cdev, 0, &info->chid);
5110 info->ssid = dev_id.ssid;
5111
5112 dev_info(&card->gdev->dev, "CHID: %x CHPID: %x\n",
5113 info->chid, info->chpid);
5114
5115 QETH_CARD_TEXT_(card, 3, "devn%x", info->ddev_devno);
5116 QETH_CARD_TEXT_(card, 3, "cssid:%x", info->cssid);
5117 QETH_CARD_TEXT_(card, 3, "iid:%x", info->iid);
5118 QETH_CARD_TEXT_(card, 3, "ssid:%x", info->ssid);
5119 QETH_CARD_TEXT_(card, 3, "chpid:%x", info->chpid);
5120 QETH_CARD_TEXT_(card, 3, "chid:%x", info->chid);
5121 QETH_CARD_TEXT_(card, 3, "idval%x", info->ids_valid);
5122 }
5123
5124 static int qeth_qdio_establish(struct qeth_card *card)
5125 {
5126 struct qdio_buffer **out_sbal_ptrs[QETH_MAX_OUT_QUEUES];
5127 struct qdio_buffer **in_sbal_ptrs[QETH_MAX_IN_QUEUES];
5128 struct qeth_qib_parms *qib_parms = NULL;
5129 struct qdio_initialize init_data;
5130 unsigned int no_input_qs = 1;
5131 unsigned int i;
5132 int rc = 0;
5133
5134 QETH_CARD_TEXT(card, 2, "qdioest");
5135
5136 if (!IS_IQD(card) && !IS_VM_NIC(card)) {
5137 qib_parms = kzalloc(sizeof_field(struct qib, parm), GFP_KERNEL);
5138 if (!qib_parms)
5139 return -ENOMEM;
5140
5141 qeth_fill_qib_parms(card, qib_parms);
5142 }
5143
5144 in_sbal_ptrs[0] = card->qdio.in_q->qdio_bufs;
5145 if (card->options.cq == QETH_CQ_ENABLED) {
5146 in_sbal_ptrs[1] = card->qdio.c_q->qdio_bufs;
5147 no_input_qs++;
5148 }
5149
5150 for (i = 0; i < card->qdio.no_out_queues; i++)
5151 out_sbal_ptrs[i] = card->qdio.out_qs[i]->qdio_bufs;
5152
5153 memset(&init_data, 0, sizeof(struct qdio_initialize));
5154 init_data.q_format = IS_IQD(card) ? QDIO_IQDIO_QFMT :
5155 QDIO_QETH_QFMT;
5156 init_data.qib_param_field_format = 0;
5157 init_data.qib_param_field = (void *)qib_parms;
5158 init_data.no_input_qs = no_input_qs;
5159 init_data.no_output_qs = card->qdio.no_out_queues;
5160 init_data.input_handler = qeth_qdio_input_handler;
5161 init_data.output_handler = qeth_qdio_output_handler;
5162 init_data.irq_poll = qeth_qdio_poll;
5163 init_data.int_parm = (unsigned long) card;
5164 init_data.input_sbal_addr_array = in_sbal_ptrs;
5165 init_data.output_sbal_addr_array = out_sbal_ptrs;
5166
5167 if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED,
5168 QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) {
5169 rc = qdio_allocate(CARD_DDEV(card), init_data.no_input_qs,
5170 init_data.no_output_qs);
5171 if (rc) {
5172 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5173 goto out;
5174 }
5175 rc = qdio_establish(CARD_DDEV(card), &init_data);
5176 if (rc) {
5177 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5178 qdio_free(CARD_DDEV(card));
5179 }
5180 }
5181
5182 switch (card->options.cq) {
5183 case QETH_CQ_ENABLED:
5184 dev_info(&card->gdev->dev, "Completion Queue support enabled");
5185 break;
5186 case QETH_CQ_DISABLED:
5187 dev_info(&card->gdev->dev, "Completion Queue support disabled");
5188 break;
5189 default:
5190 break;
5191 }
5192
5193 out:
5194 kfree(qib_parms);
5195 return rc;
5196 }
5197
5198 static void qeth_core_free_card(struct qeth_card *card)
5199 {
5200 QETH_CARD_TEXT(card, 2, "freecrd");
5201
5202 unregister_service_level(&card->qeth_service_level);
5203 debugfs_remove_recursive(card->debugfs);
5204 qeth_put_cmd(card->read_cmd);
5205 destroy_workqueue(card->event_wq);
5206 dev_set_drvdata(&card->gdev->dev, NULL);
5207 kfree(card);
5208 }
5209
5210 static void qeth_trace_features(struct qeth_card *card)
5211 {
5212 QETH_CARD_TEXT(card, 2, "features");
5213 QETH_CARD_HEX(card, 2, &card->options.ipa4, sizeof(card->options.ipa4));
5214 QETH_CARD_HEX(card, 2, &card->options.ipa6, sizeof(card->options.ipa6));
5215 QETH_CARD_HEX(card, 2, &card->options.adp, sizeof(card->options.adp));
5216 QETH_CARD_HEX(card, 2, &card->info.diagass_support,
5217 sizeof(card->info.diagass_support));
5218 }
5219
5220 static struct ccw_device_id qeth_ids[] = {
5221 {CCW_DEVICE_DEVTYPE(0x1731, 0x01, 0x1732, 0x01),
5222 .driver_info = QETH_CARD_TYPE_OSD},
5223 {CCW_DEVICE_DEVTYPE(0x1731, 0x05, 0x1732, 0x05),
5224 .driver_info = QETH_CARD_TYPE_IQD},
5225 {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x03),
5226 .driver_info = QETH_CARD_TYPE_OSM},
5227 #ifdef CONFIG_QETH_OSX
5228 {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02),
5229 .driver_info = QETH_CARD_TYPE_OSX},
5230 #endif
5231 {},
5232 };
5233 MODULE_DEVICE_TABLE(ccw, qeth_ids);
5234
5235 static struct ccw_driver qeth_ccw_driver = {
5236 .driver = {
5237 .owner = THIS_MODULE,
5238 .name = "qeth",
5239 },
5240 .ids = qeth_ids,
5241 .probe = ccwgroup_probe_ccwdev,
5242 .remove = ccwgroup_remove_ccwdev,
5243 };
5244
5245 static int qeth_hardsetup_card(struct qeth_card *card, bool *carrier_ok)
5246 {
5247 int retries = 3;
5248 int rc;
5249
5250 QETH_CARD_TEXT(card, 2, "hrdsetup");
5251 atomic_set(&card->force_alloc_skb, 0);
5252 rc = qeth_update_from_chp_desc(card);
5253 if (rc)
5254 return rc;
5255 retry:
5256 if (retries < 3)
5257 QETH_DBF_MESSAGE(2, "Retrying to do IDX activates on device %x.\n",
5258 CARD_DEVID(card));
5259 rc = qeth_qdio_clear_card(card, !IS_IQD(card));
5260 qeth_stop_channel(&card->data);
5261 qeth_stop_channel(&card->write);
5262 qeth_stop_channel(&card->read);
5263 qdio_free(CARD_DDEV(card));
5264
5265 rc = qeth_start_channel(&card->read);
5266 if (rc)
5267 goto retriable;
5268 rc = qeth_start_channel(&card->write);
5269 if (rc)
5270 goto retriable;
5271 rc = qeth_start_channel(&card->data);
5272 if (rc)
5273 goto retriable;
5274 retriable:
5275 if (rc == -ERESTARTSYS) {
5276 QETH_CARD_TEXT(card, 2, "break1");
5277 return rc;
5278 } else if (rc) {
5279 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
5280 if (--retries < 0)
5281 goto out;
5282 else
5283 goto retry;
5284 }
5285
5286 qeth_determine_capabilities(card);
5287 qeth_read_ccw_conf_data(card);
5288 qeth_idx_init(card);
5289
5290 rc = qeth_idx_activate_read_channel(card);
5291 if (rc == -EINTR) {
5292 QETH_CARD_TEXT(card, 2, "break2");
5293 return rc;
5294 } else if (rc) {
5295 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
5296 if (--retries < 0)
5297 goto out;
5298 else
5299 goto retry;
5300 }
5301
5302 rc = qeth_idx_activate_write_channel(card);
5303 if (rc == -EINTR) {
5304 QETH_CARD_TEXT(card, 2, "break3");
5305 return rc;
5306 } else if (rc) {
5307 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
5308 if (--retries < 0)
5309 goto out;
5310 else
5311 goto retry;
5312 }
5313 card->read_or_write_problem = 0;
5314 rc = qeth_mpc_initialize(card);
5315 if (rc) {
5316 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
5317 goto out;
5318 }
5319
5320 rc = qeth_send_startlan(card);
5321 if (rc) {
5322 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
5323 if (rc == -ENETDOWN) {
5324 dev_warn(&card->gdev->dev, "The LAN is offline\n");
5325 *carrier_ok = false;
5326 } else {
5327 goto out;
5328 }
5329 } else {
5330 *carrier_ok = true;
5331 }
5332
5333 card->options.ipa4.supported = 0;
5334 card->options.ipa6.supported = 0;
5335 card->options.adp.supported = 0;
5336 card->options.sbp.supported_funcs = 0;
5337 card->info.diagass_support = 0;
5338 rc = qeth_query_ipassists(card, QETH_PROT_IPV4);
5339 if (rc == -ENOMEM)
5340 goto out;
5341 if (qeth_is_supported(card, IPA_IPV6)) {
5342 rc = qeth_query_ipassists(card, QETH_PROT_IPV6);
5343 if (rc == -ENOMEM)
5344 goto out;
5345 }
5346 if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
5347 rc = qeth_query_setadapterparms(card);
5348 if (rc < 0) {
5349 QETH_CARD_TEXT_(card, 2, "7err%d", rc);
5350 goto out;
5351 }
5352 }
5353 if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
5354 rc = qeth_query_setdiagass(card);
5355 if (rc)
5356 QETH_CARD_TEXT_(card, 2, "8err%d", rc);
5357 }
5358
5359 qeth_trace_features(card);
5360
5361 if (!qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP) ||
5362 (card->info.hwtrap && qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM)))
5363 card->info.hwtrap = 0;
5364
5365 if (card->options.isolation != ISOLATION_MODE_NONE) {
5366 rc = qeth_setadpparms_set_access_ctrl(card,
5367 card->options.isolation);
5368 if (rc)
5369 goto out;
5370 }
5371
5372 qeth_init_link_info(card);
5373
5374 rc = qeth_init_qdio_queues(card);
5375 if (rc) {
5376 QETH_CARD_TEXT_(card, 2, "9err%d", rc);
5377 goto out;
5378 }
5379
5380 return 0;
5381 out:
5382 dev_warn(&card->gdev->dev, "The qeth device driver failed to recover "
5383 "an error on the device\n");
5384 QETH_DBF_MESSAGE(2, "Initialization for device %x failed in hardsetup! rc=%d\n",
5385 CARD_DEVID(card), rc);
5386 return rc;
5387 }
5388
5389 static int qeth_set_online(struct qeth_card *card,
5390 const struct qeth_discipline *disc)
5391 {
5392 bool carrier_ok;
5393 int rc;
5394
5395 mutex_lock(&card->conf_mutex);
5396 QETH_CARD_TEXT(card, 2, "setonlin");
5397
5398 rc = qeth_hardsetup_card(card, &carrier_ok);
5399 if (rc) {
5400 QETH_CARD_TEXT_(card, 2, "2err%04x", rc);
5401 rc = -ENODEV;
5402 goto err_hardsetup;
5403 }
5404
5405 qeth_print_status_message(card);
5406
5407 if (card->dev->reg_state != NETREG_REGISTERED)
5408 /* no need for locking / error handling at this early stage: */
5409 qeth_set_real_num_tx_queues(card, qeth_tx_actual_queues(card));
5410
5411 rc = disc->set_online(card, carrier_ok);
5412 if (rc)
5413 goto err_online;
5414
5415 /* let user_space know that device is online */
5416 kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE);
5417
5418 mutex_unlock(&card->conf_mutex);
5419 return 0;
5420
5421 err_online:
5422 err_hardsetup:
5423 qeth_qdio_clear_card(card, 0);
5424 qeth_clear_working_pool_list(card);
5425 qeth_flush_local_addrs(card);
5426
5427 qeth_stop_channel(&card->data);
5428 qeth_stop_channel(&card->write);
5429 qeth_stop_channel(&card->read);
5430 qdio_free(CARD_DDEV(card));
5431
5432 mutex_unlock(&card->conf_mutex);
5433 return rc;
5434 }
5435
5436 int qeth_set_offline(struct qeth_card *card, const struct qeth_discipline *disc,
5437 bool resetting)
5438 {
5439 int rc, rc2, rc3;
5440
5441 mutex_lock(&card->conf_mutex);
5442 QETH_CARD_TEXT(card, 3, "setoffl");
5443
5444 if ((!resetting && card->info.hwtrap) || card->info.hwtrap == 2) {
5445 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
5446 card->info.hwtrap = 1;
5447 }
5448
5449 /* cancel any stalled cmd that might block the rtnl: */
5450 qeth_clear_ipacmd_list(card);
5451
5452 rtnl_lock();
5453 card->info.open_when_online = card->dev->flags & IFF_UP;
5454 dev_close(card->dev);
5455 netif_device_detach(card->dev);
5456 netif_carrier_off(card->dev);
5457 rtnl_unlock();
5458
5459 cancel_work_sync(&card->rx_mode_work);
5460
5461 disc->set_offline(card);
5462
5463 qeth_qdio_clear_card(card, 0);
5464 qeth_drain_output_queues(card);
5465 qeth_clear_working_pool_list(card);
5466 qeth_flush_local_addrs(card);
5467 card->info.promisc_mode = 0;
5468
5469 rc = qeth_stop_channel(&card->data);
5470 rc2 = qeth_stop_channel(&card->write);
5471 rc3 = qeth_stop_channel(&card->read);
5472 if (!rc)
5473 rc = (rc2) ? rc2 : rc3;
5474 if (rc)
5475 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
5476 qdio_free(CARD_DDEV(card));
5477
5478 /* let user_space know that device is offline */
5479 kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE);
5480
5481 mutex_unlock(&card->conf_mutex);
5482 return 0;
5483 }
5484 EXPORT_SYMBOL_GPL(qeth_set_offline);
5485
5486 static int qeth_do_reset(void *data)
5487 {
5488 const struct qeth_discipline *disc;
5489 struct qeth_card *card = data;
5490 int rc;
5491
5492 /* Lock-free, other users will block until we are done. */
5493 disc = card->discipline;
5494
5495 QETH_CARD_TEXT(card, 2, "recover1");
5496 if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
5497 return 0;
5498 QETH_CARD_TEXT(card, 2, "recover2");
5499 dev_warn(&card->gdev->dev,
5500 "A recovery process has been started for the device\n");
5501
5502 qeth_set_offline(card, disc, true);
5503 rc = qeth_set_online(card, disc);
5504 if (!rc) {
5505 dev_info(&card->gdev->dev,
5506 "Device successfully recovered!\n");
5507 } else {
5508 qeth_set_offline(card, disc, true);
5509 ccwgroup_set_offline(card->gdev, false);
5510 dev_warn(&card->gdev->dev,
5511 "The qeth device driver failed to recover an error on the device\n");
5512 }
5513 qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
5514 qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
5515 return 0;
5516 }
5517
5518 #if IS_ENABLED(CONFIG_QETH_L3)
5519 static void qeth_l3_rebuild_skb(struct qeth_card *card, struct sk_buff *skb,
5520 struct qeth_hdr *hdr)
5521 {
5522 struct af_iucv_trans_hdr *iucv = (struct af_iucv_trans_hdr *) skb->data;
5523 struct qeth_hdr_layer3 *l3_hdr = &hdr->hdr.l3;
5524 struct net_device *dev = skb->dev;
5525
5526 if (IS_IQD(card) && iucv->magic == ETH_P_AF_IUCV) {
5527 dev_hard_header(skb, dev, ETH_P_AF_IUCV, dev->dev_addr,
5528 "FAKELL", skb->len);
5529 return;
5530 }
5531
5532 if (!(l3_hdr->flags & QETH_HDR_PASSTHRU)) {
5533 u16 prot = (l3_hdr->flags & QETH_HDR_IPV6) ? ETH_P_IPV6 :
5534 ETH_P_IP;
5535 unsigned char tg_addr[ETH_ALEN];
5536
5537 skb_reset_network_header(skb);
5538 switch (l3_hdr->flags & QETH_HDR_CAST_MASK) {
5539 case QETH_CAST_MULTICAST:
5540 if (prot == ETH_P_IP)
5541 ip_eth_mc_map(ip_hdr(skb)->daddr, tg_addr);
5542 else
5543 ipv6_eth_mc_map(&ipv6_hdr(skb)->daddr, tg_addr);
5544 QETH_CARD_STAT_INC(card, rx_multicast);
5545 break;
5546 case QETH_CAST_BROADCAST:
5547 ether_addr_copy(tg_addr, dev->broadcast);
5548 QETH_CARD_STAT_INC(card, rx_multicast);
5549 break;
5550 default:
5551 if (card->options.sniffer)
5552 skb->pkt_type = PACKET_OTHERHOST;
5553 ether_addr_copy(tg_addr, dev->dev_addr);
5554 }
5555
5556 if (l3_hdr->ext_flags & QETH_HDR_EXT_SRC_MAC_ADDR)
5557 dev_hard_header(skb, dev, prot, tg_addr,
5558 &l3_hdr->next_hop.rx.src_mac, skb->len);
5559 else
5560 dev_hard_header(skb, dev, prot, tg_addr, "FAKELL",
5561 skb->len);
5562 }
5563
5564 /* copy VLAN tag from hdr into skb */
5565 if (!card->options.sniffer &&
5566 (l3_hdr->ext_flags & (QETH_HDR_EXT_VLAN_FRAME |
5567 QETH_HDR_EXT_INCLUDE_VLAN_TAG))) {
5568 u16 tag = (l3_hdr->ext_flags & QETH_HDR_EXT_VLAN_FRAME) ?
5569 l3_hdr->vlan_id :
5570 l3_hdr->next_hop.rx.vlan_id;
5571
5572 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag);
5573 }
5574 }
5575 #endif
5576
5577 static void qeth_receive_skb(struct qeth_card *card, struct sk_buff *skb,
5578 bool uses_frags, bool is_cso)
5579 {
5580 struct napi_struct *napi = &card->napi;
5581
5582 if (is_cso && (card->dev->features & NETIF_F_RXCSUM)) {
5583 skb->ip_summed = CHECKSUM_UNNECESSARY;
5584 QETH_CARD_STAT_INC(card, rx_skb_csum);
5585 } else {
5586 skb->ip_summed = CHECKSUM_NONE;
5587 }
5588
5589 QETH_CARD_STAT_ADD(card, rx_bytes, skb->len);
5590 QETH_CARD_STAT_INC(card, rx_packets);
5591 if (skb_is_nonlinear(skb)) {
5592 QETH_CARD_STAT_INC(card, rx_sg_skbs);
5593 QETH_CARD_STAT_ADD(card, rx_sg_frags,
5594 skb_shinfo(skb)->nr_frags);
5595 }
5596
5597 if (uses_frags) {
5598 napi_gro_frags(napi);
5599 } else {
5600 skb->protocol = eth_type_trans(skb, skb->dev);
5601 napi_gro_receive(napi, skb);
5602 }
5603 }
5604
5605 static void qeth_create_skb_frag(struct sk_buff *skb, char *data, int data_len)
5606 {
5607 struct page *page = virt_to_page(data);
5608 unsigned int next_frag;
5609
5610 next_frag = skb_shinfo(skb)->nr_frags;
5611 get_page(page);
5612 skb_add_rx_frag(skb, next_frag, page, offset_in_page(data), data_len,
5613 data_len);
5614 }
5615
5616 static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale)
5617 {
5618 return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY);
5619 }
5620
5621 static int qeth_extract_skb(struct qeth_card *card,
5622 struct qeth_qdio_buffer *qethbuffer, u8 *element_no,
5623 int *__offset)
5624 {
5625 struct qeth_priv *priv = netdev_priv(card->dev);
5626 struct qdio_buffer *buffer = qethbuffer->buffer;
5627 struct napi_struct *napi = &card->napi;
5628 struct qdio_buffer_element *element;
5629 unsigned int linear_len = 0;
5630 bool uses_frags = false;
5631 int offset = *__offset;
5632 bool use_rx_sg = false;
5633 unsigned int headroom;
5634 struct qeth_hdr *hdr;
5635 struct sk_buff *skb;
5636 int skb_len = 0;
5637 bool is_cso;
5638
5639 element = &buffer->element[*element_no];
5640
5641 next_packet:
5642 /* qeth_hdr must not cross element boundaries */
5643 while (element->length < offset + sizeof(struct qeth_hdr)) {
5644 if (qeth_is_last_sbale(element))
5645 return -ENODATA;
5646 element++;
5647 offset = 0;
5648 }
5649
5650 hdr = phys_to_virt(element->addr) + offset;
5651 offset += sizeof(*hdr);
5652 skb = NULL;
5653
5654 switch (hdr->hdr.l2.id) {
5655 case QETH_HEADER_TYPE_LAYER2:
5656 skb_len = hdr->hdr.l2.pkt_length;
5657 is_cso = hdr->hdr.l2.flags[1] & QETH_HDR_EXT_CSUM_TRANSP_REQ;
5658
5659 linear_len = ETH_HLEN;
5660 headroom = 0;
5661 break;
5662 case QETH_HEADER_TYPE_LAYER3:
5663 skb_len = hdr->hdr.l3.length;
5664 is_cso = hdr->hdr.l3.ext_flags & QETH_HDR_EXT_CSUM_TRANSP_REQ;
5665
5666 if (!IS_LAYER3(card)) {
5667 QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5668 goto walk_packet;
5669 }
5670
5671 if (hdr->hdr.l3.flags & QETH_HDR_PASSTHRU) {
5672 linear_len = ETH_HLEN;
5673 headroom = 0;
5674 break;
5675 }
5676
5677 if (hdr->hdr.l3.flags & QETH_HDR_IPV6)
5678 linear_len = sizeof(struct ipv6hdr);
5679 else
5680 linear_len = sizeof(struct iphdr);
5681 headroom = ETH_HLEN;
5682 break;
5683 default:
5684 if (hdr->hdr.l2.id & QETH_HEADER_MASK_INVAL)
5685 QETH_CARD_STAT_INC(card, rx_frame_errors);
5686 else
5687 QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5688
5689 /* Can't determine packet length, drop the whole buffer. */
5690 return -EPROTONOSUPPORT;
5691 }
5692
5693 if (skb_len < linear_len) {
5694 QETH_CARD_STAT_INC(card, rx_dropped_runt);
5695 goto walk_packet;
5696 }
5697
5698 use_rx_sg = (card->options.cq == QETH_CQ_ENABLED) ||
5699 (skb_len > READ_ONCE(priv->rx_copybreak) &&
5700 !atomic_read(&card->force_alloc_skb));
5701
5702 if (use_rx_sg) {
5703 /* QETH_CQ_ENABLED only: */
5704 if (qethbuffer->rx_skb &&
5705 skb_tailroom(qethbuffer->rx_skb) >= linear_len + headroom) {
5706 skb = qethbuffer->rx_skb;
5707 qethbuffer->rx_skb = NULL;
5708 goto use_skb;
5709 }
5710
5711 skb = napi_get_frags(napi);
5712 if (!skb) {
5713 /* -ENOMEM, no point in falling back further. */
5714 QETH_CARD_STAT_INC(card, rx_dropped_nomem);
5715 goto walk_packet;
5716 }
5717
5718 if (skb_tailroom(skb) >= linear_len + headroom) {
5719 uses_frags = true;
5720 goto use_skb;
5721 }
5722
5723 netdev_info_once(card->dev,
5724 "Insufficient linear space in NAPI frags skb, need %u but have %u\n",
5725 linear_len + headroom, skb_tailroom(skb));
5726 /* Shouldn't happen. Don't optimize, fall back to linear skb. */
5727 }
5728
5729 linear_len = skb_len;
5730 skb = napi_alloc_skb(napi, linear_len + headroom);
5731 if (!skb) {
5732 QETH_CARD_STAT_INC(card, rx_dropped_nomem);
5733 goto walk_packet;
5734 }
5735
5736 use_skb:
5737 if (headroom)
5738 skb_reserve(skb, headroom);
5739 walk_packet:
5740 while (skb_len) {
5741 int data_len = min(skb_len, (int)(element->length - offset));
5742 char *data = phys_to_virt(element->addr) + offset;
5743
5744 skb_len -= data_len;
5745 offset += data_len;
5746
5747 /* Extract data from current element: */
5748 if (skb && data_len) {
5749 if (linear_len) {
5750 unsigned int copy_len;
5751
5752 copy_len = min_t(unsigned int, linear_len,
5753 data_len);
5754
5755 skb_put_data(skb, data, copy_len);
5756 linear_len -= copy_len;
5757 data_len -= copy_len;
5758 data += copy_len;
5759 }
5760
5761 if (data_len)
5762 qeth_create_skb_frag(skb, data, data_len);
5763 }
5764
5765 /* Step forward to next element: */
5766 if (skb_len) {
5767 if (qeth_is_last_sbale(element)) {
5768 QETH_CARD_TEXT(card, 4, "unexeob");
5769 QETH_CARD_HEX(card, 2, buffer, sizeof(void *));
5770 if (skb) {
5771 if (uses_frags)
5772 napi_free_frags(napi);
5773 else
5774 kfree_skb(skb);
5775 QETH_CARD_STAT_INC(card,
5776 rx_length_errors);
5777 }
5778 return -EMSGSIZE;
5779 }
5780 element++;
5781 offset = 0;
5782 }
5783 }
5784
5785 /* This packet was skipped, go get another one: */
5786 if (!skb)
5787 goto next_packet;
5788
5789 *element_no = element - &buffer->element[0];
5790 *__offset = offset;
5791
5792 #if IS_ENABLED(CONFIG_QETH_L3)
5793 if (hdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER3)
5794 qeth_l3_rebuild_skb(card, skb, hdr);
5795 #endif
5796
5797 qeth_receive_skb(card, skb, uses_frags, is_cso);
5798 return 0;
5799 }
5800
5801 static unsigned int qeth_extract_skbs(struct qeth_card *card, int budget,
5802 struct qeth_qdio_buffer *buf, bool *done)
5803 {
5804 unsigned int work_done = 0;
5805
5806 while (budget) {
5807 if (qeth_extract_skb(card, buf, &card->rx.buf_element,
5808 &card->rx.e_offset)) {
5809 *done = true;
5810 break;
5811 }
5812
5813 work_done++;
5814 budget--;
5815 }
5816
5817 return work_done;
5818 }
5819
5820 static unsigned int qeth_rx_poll(struct qeth_card *card, int budget)
5821 {
5822 struct qeth_rx *ctx = &card->rx;
5823 unsigned int work_done = 0;
5824
5825 while (budget > 0) {
5826 struct qeth_qdio_buffer *buffer;
5827 unsigned int skbs_done = 0;
5828 bool done = false;
5829
5830 /* Fetch completed RX buffers: */
5831 if (!card->rx.b_count) {
5832 card->rx.qdio_err = 0;
5833 card->rx.b_count = qdio_inspect_queue(CARD_DDEV(card),
5834 0, true,
5835 &card->rx.b_index,
5836 &card->rx.qdio_err);
5837 if (card->rx.b_count <= 0) {
5838 card->rx.b_count = 0;
5839 break;
5840 }
5841 }
5842
5843 /* Process one completed RX buffer: */
5844 buffer = &card->qdio.in_q->bufs[card->rx.b_index];
5845 if (!(card->rx.qdio_err &&
5846 qeth_check_qdio_errors(card, buffer->buffer,
5847 card->rx.qdio_err, "qinerr")))
5848 skbs_done = qeth_extract_skbs(card, budget, buffer,
5849 &done);
5850 else
5851 done = true;
5852
5853 work_done += skbs_done;
5854 budget -= skbs_done;
5855
5856 if (done) {
5857 QETH_CARD_STAT_INC(card, rx_bufs);
5858 qeth_put_buffer_pool_entry(card, buffer->pool_entry);
5859 buffer->pool_entry = NULL;
5860 card->rx.b_count--;
5861 ctx->bufs_refill++;
5862 ctx->bufs_refill -= qeth_rx_refill_queue(card,
5863 ctx->bufs_refill);
5864
5865 /* Step forward to next buffer: */
5866 card->rx.b_index = QDIO_BUFNR(card->rx.b_index + 1);
5867 card->rx.buf_element = 0;
5868 card->rx.e_offset = 0;
5869 }
5870 }
5871
5872 return work_done;
5873 }
5874
5875 static void qeth_cq_poll(struct qeth_card *card)
5876 {
5877 unsigned int work_done = 0;
5878
5879 while (work_done < QDIO_MAX_BUFFERS_PER_Q) {
5880 unsigned int start, error;
5881 int completed;
5882
5883 completed = qdio_inspect_queue(CARD_DDEV(card), 1, true, &start,
5884 &error);
5885 if (completed <= 0)
5886 return;
5887
5888 qeth_qdio_cq_handler(card, error, 1, start, completed);
5889 work_done += completed;
5890 }
5891 }
5892
5893 int qeth_poll(struct napi_struct *napi, int budget)
5894 {
5895 struct qeth_card *card = container_of(napi, struct qeth_card, napi);
5896 unsigned int work_done;
5897
5898 work_done = qeth_rx_poll(card, budget);
5899
5900 if (qeth_use_tx_irqs(card)) {
5901 struct qeth_qdio_out_q *queue;
5902 unsigned int i;
5903
5904 qeth_for_each_output_queue(card, queue, i) {
5905 if (!qeth_out_queue_is_empty(queue))
5906 napi_schedule(&queue->napi);
5907 }
5908 }
5909
5910 if (card->options.cq == QETH_CQ_ENABLED)
5911 qeth_cq_poll(card);
5912
5913 if (budget) {
5914 struct qeth_rx *ctx = &card->rx;
5915
5916 /* Process any substantial refill backlog: */
5917 ctx->bufs_refill -= qeth_rx_refill_queue(card, ctx->bufs_refill);
5918
5919 /* Exhausted the RX budget. Keep IRQ disabled, we get called again. */
5920 if (work_done >= budget)
5921 return work_done;
5922 }
5923
5924 if (napi_complete_done(napi, work_done) &&
5925 qdio_start_irq(CARD_DDEV(card)))
5926 napi_schedule(napi);
5927
5928 return work_done;
5929 }
5930 EXPORT_SYMBOL_GPL(qeth_poll);
5931
5932 static void qeth_iqd_tx_complete(struct qeth_qdio_out_q *queue,
5933 unsigned int bidx, unsigned int qdio_error,
5934 int budget)
5935 {
5936 struct qeth_qdio_out_buffer *buffer = queue->bufs[bidx];
5937 u8 sflags = buffer->buffer->element[15].sflags;
5938 struct qeth_card *card = queue->card;
5939 bool error = !!qdio_error;
5940
5941 if (qdio_error == QDIO_ERROR_SLSB_PENDING) {
5942 struct qaob *aob = buffer->aob;
5943 struct qeth_qaob_priv1 *priv;
5944 enum iucv_tx_notify notify;
5945
5946 if (!aob) {
5947 netdev_WARN_ONCE(card->dev,
5948 "Pending TX buffer %#x without QAOB on TX queue %u\n",
5949 bidx, queue->queue_no);
5950 qeth_schedule_recovery(card);
5951 return;
5952 }
5953
5954 QETH_CARD_TEXT_(card, 5, "pel%u", bidx);
5955
5956 priv = (struct qeth_qaob_priv1 *)&aob->user1;
5957 /* QAOB hasn't completed yet: */
5958 if (xchg(&priv->state, QETH_QAOB_PENDING) != QETH_QAOB_DONE) {
5959 qeth_notify_skbs(queue, buffer, TX_NOTIFY_PENDING);
5960
5961 /* Prepare the queue slot for immediate re-use: */
5962 qeth_scrub_qdio_buffer(buffer->buffer, queue->max_elements);
5963 if (qeth_alloc_out_buf(queue, bidx, GFP_ATOMIC)) {
5964 QETH_CARD_TEXT(card, 2, "outofbuf");
5965 qeth_schedule_recovery(card);
5966 }
5967
5968 list_add(&buffer->list_entry, &queue->pending_bufs);
5969 /* Skip clearing the buffer: */
5970 return;
5971 }
5972
5973 /* QAOB already completed: */
5974 notify = qeth_compute_cq_notification(aob->aorc, 0);
5975 qeth_notify_skbs(queue, buffer, notify);
5976 error = !!aob->aorc;
5977 memset(aob, 0, sizeof(*aob));
5978 } else if (card->options.cq == QETH_CQ_ENABLED) {
5979 qeth_notify_skbs(queue, buffer,
5980 qeth_compute_cq_notification(sflags, 0));
5981 }
5982
5983 qeth_clear_output_buffer(queue, buffer, error, budget);
5984 }
5985
5986 static int qeth_tx_poll(struct napi_struct *napi, int budget)
5987 {
5988 struct qeth_qdio_out_q *queue = qeth_napi_to_out_queue(napi);
5989 unsigned int queue_no = queue->queue_no;
5990 struct qeth_card *card = queue->card;
5991 struct net_device *dev = card->dev;
5992 unsigned int work_done = 0;
5993 struct netdev_queue *txq;
5994
5995 if (IS_IQD(card))
5996 txq = netdev_get_tx_queue(dev, qeth_iqd_translate_txq(dev, queue_no));
5997 else
5998 txq = netdev_get_tx_queue(dev, queue_no);
5999
6000 while (1) {
6001 unsigned int start, error, i;
6002 unsigned int packets = 0;
6003 unsigned int bytes = 0;
6004 int completed;
6005
6006 qeth_tx_complete_pending_bufs(card, queue, false, budget);
6007
6008 if (qeth_out_queue_is_empty(queue)) {
6009 napi_complete(napi);
6010 return 0;
6011 }
6012
6013 /* Give the CPU a breather: */
6014 if (work_done >= QDIO_MAX_BUFFERS_PER_Q) {
6015 QETH_TXQ_STAT_INC(queue, completion_yield);
6016 if (napi_complete_done(napi, 0))
6017 napi_schedule(napi);
6018 return 0;
6019 }
6020
6021 completed = qdio_inspect_queue(CARD_DDEV(card), queue_no, false,
6022 &start, &error);
6023 if (completed <= 0) {
6024 /* Ensure we see TX completion for pending work: */
6025 if (napi_complete_done(napi, 0) &&
6026 !atomic_read(&queue->set_pci_flags_count))
6027 qeth_tx_arm_timer(queue, queue->rescan_usecs);
6028 return 0;
6029 }
6030
6031 for (i = start; i < start + completed; i++) {
6032 struct qeth_qdio_out_buffer *buffer;
6033 unsigned int bidx = QDIO_BUFNR(i);
6034
6035 buffer = queue->bufs[bidx];
6036 packets += buffer->frames;
6037 bytes += buffer->bytes;
6038
6039 qeth_handle_send_error(card, buffer, error);
6040 if (IS_IQD(card))
6041 qeth_iqd_tx_complete(queue, bidx, error, budget);
6042 else
6043 qeth_clear_output_buffer(queue, buffer, error,
6044 budget);
6045 }
6046
6047 atomic_sub(completed, &queue->used_buffers);
6048 work_done += completed;
6049 if (IS_IQD(card))
6050 netdev_tx_completed_queue(txq, packets, bytes);
6051 else
6052 qeth_check_outbound_queue(queue);
6053
6054 /* xmit may have observed the full-condition, but not yet
6055 * stopped the txq. In which case the code below won't trigger.
6056 * So before returning, xmit will re-check the txq's fill level
6057 * and wake it up if needed.
6058 */
6059 if (netif_tx_queue_stopped(txq) &&
6060 !qeth_out_queue_is_full(queue))
6061 netif_tx_wake_queue(txq);
6062 }
6063 }
6064
6065 static int qeth_setassparms_inspect_rc(struct qeth_ipa_cmd *cmd)
6066 {
6067 if (!cmd->hdr.return_code)
6068 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
6069 return cmd->hdr.return_code;
6070 }
6071
6072 static int qeth_setassparms_get_caps_cb(struct qeth_card *card,
6073 struct qeth_reply *reply,
6074 unsigned long data)
6075 {
6076 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6077 struct qeth_ipa_caps *caps = reply->param;
6078
6079 if (qeth_setassparms_inspect_rc(cmd))
6080 return -EIO;
6081
6082 caps->supported = cmd->data.setassparms.data.caps.supported;
6083 caps->enabled = cmd->data.setassparms.data.caps.enabled;
6084 return 0;
6085 }
6086
6087 int qeth_setassparms_cb(struct qeth_card *card,
6088 struct qeth_reply *reply, unsigned long data)
6089 {
6090 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6091
6092 QETH_CARD_TEXT(card, 4, "defadpcb");
6093
6094 if (cmd->hdr.return_code)
6095 return -EIO;
6096
6097 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
6098 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
6099 card->options.ipa4.enabled = cmd->hdr.assists.enabled;
6100 if (cmd->hdr.prot_version == QETH_PROT_IPV6)
6101 card->options.ipa6.enabled = cmd->hdr.assists.enabled;
6102 return 0;
6103 }
6104 EXPORT_SYMBOL_GPL(qeth_setassparms_cb);
6105
6106 struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card,
6107 enum qeth_ipa_funcs ipa_func,
6108 u16 cmd_code,
6109 unsigned int data_length,
6110 enum qeth_prot_versions prot)
6111 {
6112 struct qeth_ipacmd_setassparms *setassparms;
6113 struct qeth_ipacmd_setassparms_hdr *hdr;
6114 struct qeth_cmd_buffer *iob;
6115
6116 QETH_CARD_TEXT(card, 4, "getasscm");
6117 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETASSPARMS, prot,
6118 data_length +
6119 offsetof(struct qeth_ipacmd_setassparms,
6120 data));
6121 if (!iob)
6122 return NULL;
6123
6124 setassparms = &__ipa_cmd(iob)->data.setassparms;
6125 setassparms->assist_no = ipa_func;
6126
6127 hdr = &setassparms->hdr;
6128 hdr->length = sizeof(*hdr) + data_length;
6129 hdr->command_code = cmd_code;
6130 return iob;
6131 }
6132 EXPORT_SYMBOL_GPL(qeth_get_setassparms_cmd);
6133
6134 int qeth_send_simple_setassparms_prot(struct qeth_card *card,
6135 enum qeth_ipa_funcs ipa_func,
6136 u16 cmd_code, u32 *data,
6137 enum qeth_prot_versions prot)
6138 {
6139 unsigned int length = data ? SETASS_DATA_SIZEOF(flags_32bit) : 0;
6140 struct qeth_cmd_buffer *iob;
6141
6142 QETH_CARD_TEXT_(card, 4, "simassp%i", prot);
6143 iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code, length, prot);
6144 if (!iob)
6145 return -ENOMEM;
6146
6147 if (data)
6148 __ipa_cmd(iob)->data.setassparms.data.flags_32bit = *data;
6149 return qeth_send_ipa_cmd(card, iob, qeth_setassparms_cb, NULL);
6150 }
6151 EXPORT_SYMBOL_GPL(qeth_send_simple_setassparms_prot);
6152
6153 static void qeth_unregister_dbf_views(void)
6154 {
6155 int x;
6156
6157 for (x = 0; x < QETH_DBF_INFOS; x++) {
6158 debug_unregister(qeth_dbf[x].id);
6159 qeth_dbf[x].id = NULL;
6160 }
6161 }
6162
6163 void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...)
6164 {
6165 char dbf_txt_buf[32];
6166 va_list args;
6167
6168 if (!debug_level_enabled(id, level))
6169 return;
6170 va_start(args, fmt);
6171 vsnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
6172 va_end(args);
6173 debug_text_event(id, level, dbf_txt_buf);
6174 }
6175 EXPORT_SYMBOL_GPL(qeth_dbf_longtext);
6176
6177 static int qeth_register_dbf_views(void)
6178 {
6179 int ret;
6180 int x;
6181
6182 for (x = 0; x < QETH_DBF_INFOS; x++) {
6183 /* register the areas */
6184 qeth_dbf[x].id = debug_register(qeth_dbf[x].name,
6185 qeth_dbf[x].pages,
6186 qeth_dbf[x].areas,
6187 qeth_dbf[x].len);
6188 if (qeth_dbf[x].id == NULL) {
6189 qeth_unregister_dbf_views();
6190 return -ENOMEM;
6191 }
6192
6193 /* register a view */
6194 ret = debug_register_view(qeth_dbf[x].id, qeth_dbf[x].view);
6195 if (ret) {
6196 qeth_unregister_dbf_views();
6197 return ret;
6198 }
6199
6200 /* set a passing level */
6201 debug_set_level(qeth_dbf[x].id, qeth_dbf[x].level);
6202 }
6203
6204 return 0;
6205 }
6206
6207 static DEFINE_MUTEX(qeth_mod_mutex); /* for synchronized module loading */
6208
6209 int qeth_setup_discipline(struct qeth_card *card,
6210 enum qeth_discipline_id discipline)
6211 {
6212 int rc;
6213
6214 mutex_lock(&qeth_mod_mutex);
6215 switch (discipline) {
6216 case QETH_DISCIPLINE_LAYER3:
6217 card->discipline = try_then_request_module(
6218 symbol_get(qeth_l3_discipline), "qeth_l3");
6219 break;
6220 case QETH_DISCIPLINE_LAYER2:
6221 card->discipline = try_then_request_module(
6222 symbol_get(qeth_l2_discipline), "qeth_l2");
6223 break;
6224 default:
6225 break;
6226 }
6227 mutex_unlock(&qeth_mod_mutex);
6228
6229 if (!card->discipline) {
6230 dev_err(&card->gdev->dev, "There is no kernel module to "
6231 "support discipline %d\n", discipline);
6232 return -EINVAL;
6233 }
6234
6235 rc = card->discipline->setup(card->gdev);
6236 if (rc) {
6237 if (discipline == QETH_DISCIPLINE_LAYER2)
6238 symbol_put(qeth_l2_discipline);
6239 else
6240 symbol_put(qeth_l3_discipline);
6241 card->discipline = NULL;
6242
6243 return rc;
6244 }
6245
6246 card->options.layer = discipline;
6247 return 0;
6248 }
6249
6250 void qeth_remove_discipline(struct qeth_card *card)
6251 {
6252 card->discipline->remove(card->gdev);
6253
6254 if (IS_LAYER2(card))
6255 symbol_put(qeth_l2_discipline);
6256 else
6257 symbol_put(qeth_l3_discipline);
6258 card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
6259 card->discipline = NULL;
6260 }
6261
6262 static const struct device_type qeth_generic_devtype = {
6263 .name = "qeth_generic",
6264 };
6265
6266 #define DBF_NAME_LEN 20
6267
6268 struct qeth_dbf_entry {
6269 char dbf_name[DBF_NAME_LEN];
6270 debug_info_t *dbf_info;
6271 struct list_head dbf_list;
6272 };
6273
6274 static LIST_HEAD(qeth_dbf_list);
6275 static DEFINE_MUTEX(qeth_dbf_list_mutex);
6276
6277 static debug_info_t *qeth_get_dbf_entry(char *name)
6278 {
6279 struct qeth_dbf_entry *entry;
6280 debug_info_t *rc = NULL;
6281
6282 mutex_lock(&qeth_dbf_list_mutex);
6283 list_for_each_entry(entry, &qeth_dbf_list, dbf_list) {
6284 if (strcmp(entry->dbf_name, name) == 0) {
6285 rc = entry->dbf_info;
6286 break;
6287 }
6288 }
6289 mutex_unlock(&qeth_dbf_list_mutex);
6290 return rc;
6291 }
6292
6293 static int qeth_add_dbf_entry(struct qeth_card *card, char *name)
6294 {
6295 struct qeth_dbf_entry *new_entry;
6296
6297 card->debug = debug_register(name, 2, 1, 8);
6298 if (!card->debug) {
6299 QETH_DBF_TEXT_(SETUP, 2, "%s", "qcdbf");
6300 goto err;
6301 }
6302 if (debug_register_view(card->debug, &debug_hex_ascii_view))
6303 goto err_dbg;
6304 new_entry = kzalloc(sizeof(struct qeth_dbf_entry), GFP_KERNEL);
6305 if (!new_entry)
6306 goto err_dbg;
6307 strncpy(new_entry->dbf_name, name, DBF_NAME_LEN);
6308 new_entry->dbf_info = card->debug;
6309 mutex_lock(&qeth_dbf_list_mutex);
6310 list_add(&new_entry->dbf_list, &qeth_dbf_list);
6311 mutex_unlock(&qeth_dbf_list_mutex);
6312
6313 return 0;
6314
6315 err_dbg:
6316 debug_unregister(card->debug);
6317 err:
6318 return -ENOMEM;
6319 }
6320
6321 static void qeth_clear_dbf_list(void)
6322 {
6323 struct qeth_dbf_entry *entry, *tmp;
6324
6325 mutex_lock(&qeth_dbf_list_mutex);
6326 list_for_each_entry_safe(entry, tmp, &qeth_dbf_list, dbf_list) {
6327 list_del(&entry->dbf_list);
6328 debug_unregister(entry->dbf_info);
6329 kfree(entry);
6330 }
6331 mutex_unlock(&qeth_dbf_list_mutex);
6332 }
6333
6334 static struct net_device *qeth_alloc_netdev(struct qeth_card *card)
6335 {
6336 struct net_device *dev;
6337 struct qeth_priv *priv;
6338
6339 switch (card->info.type) {
6340 case QETH_CARD_TYPE_IQD:
6341 dev = alloc_netdev_mqs(sizeof(*priv), "hsi%d", NET_NAME_UNKNOWN,
6342 ether_setup, QETH_MAX_OUT_QUEUES, 1);
6343 break;
6344 case QETH_CARD_TYPE_OSM:
6345 dev = alloc_etherdev(sizeof(*priv));
6346 break;
6347 default:
6348 dev = alloc_etherdev_mqs(sizeof(*priv), QETH_MAX_OUT_QUEUES, 1);
6349 }
6350
6351 if (!dev)
6352 return NULL;
6353
6354 priv = netdev_priv(dev);
6355 priv->rx_copybreak = QETH_RX_COPYBREAK;
6356 priv->tx_wanted_queues = IS_IQD(card) ? QETH_IQD_MIN_TXQ : 1;
6357
6358 dev->ml_priv = card;
6359 dev->watchdog_timeo = QETH_TX_TIMEOUT;
6360 dev->min_mtu = 576;
6361 /* initialized when device first goes online: */
6362 dev->max_mtu = 0;
6363 dev->mtu = 0;
6364 SET_NETDEV_DEV(dev, &card->gdev->dev);
6365 netif_carrier_off(dev);
6366
6367 dev->ethtool_ops = &qeth_ethtool_ops;
6368 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
6369 dev->hw_features |= NETIF_F_SG;
6370 dev->vlan_features |= NETIF_F_SG;
6371 if (IS_IQD(card))
6372 dev->features |= NETIF_F_SG;
6373
6374 return dev;
6375 }
6376
6377 struct net_device *qeth_clone_netdev(struct net_device *orig)
6378 {
6379 struct net_device *clone = qeth_alloc_netdev(orig->ml_priv);
6380
6381 if (!clone)
6382 return NULL;
6383
6384 clone->dev_port = orig->dev_port;
6385 return clone;
6386 }
6387
6388 static int qeth_core_probe_device(struct ccwgroup_device *gdev)
6389 {
6390 struct qeth_card *card;
6391 struct device *dev;
6392 int rc;
6393 enum qeth_discipline_id enforced_disc;
6394 char dbf_name[DBF_NAME_LEN];
6395
6396 QETH_DBF_TEXT(SETUP, 2, "probedev");
6397
6398 dev = &gdev->dev;
6399 if (!get_device(dev))
6400 return -ENODEV;
6401
6402 QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev));
6403
6404 card = qeth_alloc_card(gdev);
6405 if (!card) {
6406 QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM);
6407 rc = -ENOMEM;
6408 goto err_dev;
6409 }
6410
6411 snprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
6412 dev_name(&gdev->dev));
6413 card->debug = qeth_get_dbf_entry(dbf_name);
6414 if (!card->debug) {
6415 rc = qeth_add_dbf_entry(card, dbf_name);
6416 if (rc)
6417 goto err_card;
6418 }
6419
6420 qeth_setup_card(card);
6421 card->dev = qeth_alloc_netdev(card);
6422 if (!card->dev) {
6423 rc = -ENOMEM;
6424 goto err_card;
6425 }
6426
6427 qeth_determine_capabilities(card);
6428 qeth_set_blkt_defaults(card);
6429
6430 card->qdio.in_q = qeth_alloc_qdio_queue();
6431 if (!card->qdio.in_q) {
6432 rc = -ENOMEM;
6433 goto err_rx_queue;
6434 }
6435
6436 card->qdio.no_out_queues = card->dev->num_tx_queues;
6437 rc = qeth_update_from_chp_desc(card);
6438 if (rc)
6439 goto err_chp_desc;
6440
6441 gdev->dev.groups = qeth_dev_groups;
6442
6443 enforced_disc = qeth_enforce_discipline(card);
6444 switch (enforced_disc) {
6445 case QETH_DISCIPLINE_UNDETERMINED:
6446 gdev->dev.type = &qeth_generic_devtype;
6447 break;
6448 default:
6449 card->info.layer_enforced = true;
6450 /* It's so early that we don't need the discipline_mutex yet. */
6451 rc = qeth_setup_discipline(card, enforced_disc);
6452 if (rc)
6453 goto err_setup_disc;
6454
6455 break;
6456 }
6457
6458 return 0;
6459
6460 err_setup_disc:
6461 err_chp_desc:
6462 qeth_free_qdio_queue(card->qdio.in_q);
6463 err_rx_queue:
6464 free_netdev(card->dev);
6465 err_card:
6466 qeth_core_free_card(card);
6467 err_dev:
6468 put_device(dev);
6469 return rc;
6470 }
6471
6472 static void qeth_core_remove_device(struct ccwgroup_device *gdev)
6473 {
6474 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6475
6476 QETH_CARD_TEXT(card, 2, "removedv");
6477
6478 mutex_lock(&card->discipline_mutex);
6479 if (card->discipline)
6480 qeth_remove_discipline(card);
6481 mutex_unlock(&card->discipline_mutex);
6482
6483 qeth_free_qdio_queues(card);
6484
6485 qeth_free_qdio_queue(card->qdio.in_q);
6486 free_netdev(card->dev);
6487 qeth_core_free_card(card);
6488 put_device(&gdev->dev);
6489 }
6490
6491 static int qeth_core_set_online(struct ccwgroup_device *gdev)
6492 {
6493 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6494 int rc = 0;
6495 enum qeth_discipline_id def_discipline;
6496
6497 mutex_lock(&card->discipline_mutex);
6498 if (!card->discipline) {
6499 def_discipline = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
6500 QETH_DISCIPLINE_LAYER2;
6501 rc = qeth_setup_discipline(card, def_discipline);
6502 if (rc)
6503 goto err;
6504 }
6505
6506 rc = qeth_set_online(card, card->discipline);
6507
6508 err:
6509 mutex_unlock(&card->discipline_mutex);
6510 return rc;
6511 }
6512
6513 static int qeth_core_set_offline(struct ccwgroup_device *gdev)
6514 {
6515 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6516 int rc;
6517
6518 mutex_lock(&card->discipline_mutex);
6519 rc = qeth_set_offline(card, card->discipline, false);
6520 mutex_unlock(&card->discipline_mutex);
6521
6522 return rc;
6523 }
6524
6525 static void qeth_core_shutdown(struct ccwgroup_device *gdev)
6526 {
6527 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6528
6529 qeth_set_allowed_threads(card, 0, 1);
6530 if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
6531 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
6532 qeth_qdio_clear_card(card, 0);
6533 qeth_drain_output_queues(card);
6534 qdio_free(CARD_DDEV(card));
6535 }
6536
6537 static ssize_t group_store(struct device_driver *ddrv, const char *buf,
6538 size_t count)
6539 {
6540 int err;
6541
6542 err = ccwgroup_create_dev(qeth_core_root_dev, to_ccwgroupdrv(ddrv), 3,
6543 buf);
6544
6545 return err ? err : count;
6546 }
6547 static DRIVER_ATTR_WO(group);
6548
6549 static struct attribute *qeth_drv_attrs[] = {
6550 &driver_attr_group.attr,
6551 NULL,
6552 };
6553 static struct attribute_group qeth_drv_attr_group = {
6554 .attrs = qeth_drv_attrs,
6555 };
6556 static const struct attribute_group *qeth_drv_attr_groups[] = {
6557 &qeth_drv_attr_group,
6558 NULL,
6559 };
6560
6561 static struct ccwgroup_driver qeth_core_ccwgroup_driver = {
6562 .driver = {
6563 .groups = qeth_drv_attr_groups,
6564 .owner = THIS_MODULE,
6565 .name = "qeth",
6566 },
6567 .ccw_driver = &qeth_ccw_driver,
6568 .setup = qeth_core_probe_device,
6569 .remove = qeth_core_remove_device,
6570 .set_online = qeth_core_set_online,
6571 .set_offline = qeth_core_set_offline,
6572 .shutdown = qeth_core_shutdown,
6573 };
6574
6575 int qeth_siocdevprivate(struct net_device *dev, struct ifreq *rq, void __user *data, int cmd)
6576 {
6577 struct qeth_card *card = dev->ml_priv;
6578 int rc = 0;
6579
6580 switch (cmd) {
6581 case SIOC_QETH_ADP_SET_SNMP_CONTROL:
6582 rc = qeth_snmp_command(card, data);
6583 break;
6584 case SIOC_QETH_GET_CARD_TYPE:
6585 if ((IS_OSD(card) || IS_OSM(card) || IS_OSX(card)) &&
6586 !IS_VM_NIC(card))
6587 return 1;
6588 return 0;
6589 case SIOC_QETH_QUERY_OAT:
6590 rc = qeth_query_oat_command(card, data);
6591 break;
6592 default:
6593 rc = -EOPNOTSUPP;
6594 }
6595 if (rc)
6596 QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
6597 return rc;
6598 }
6599 EXPORT_SYMBOL_GPL(qeth_siocdevprivate);
6600
6601 int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
6602 {
6603 struct qeth_card *card = dev->ml_priv;
6604 struct mii_ioctl_data *mii_data;
6605 int rc = 0;
6606
6607 switch (cmd) {
6608 case SIOCGMIIPHY:
6609 mii_data = if_mii(rq);
6610 mii_data->phy_id = 0;
6611 break;
6612 case SIOCGMIIREG:
6613 mii_data = if_mii(rq);
6614 if (mii_data->phy_id != 0)
6615 rc = -EINVAL;
6616 else
6617 mii_data->val_out = qeth_mdio_read(dev,
6618 mii_data->phy_id, mii_data->reg_num);
6619 break;
6620 default:
6621 return -EOPNOTSUPP;
6622 }
6623 if (rc)
6624 QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
6625 return rc;
6626 }
6627 EXPORT_SYMBOL_GPL(qeth_do_ioctl);
6628
6629 static int qeth_start_csum_cb(struct qeth_card *card, struct qeth_reply *reply,
6630 unsigned long data)
6631 {
6632 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6633 u32 *features = reply->param;
6634
6635 if (qeth_setassparms_inspect_rc(cmd))
6636 return -EIO;
6637
6638 *features = cmd->data.setassparms.data.flags_32bit;
6639 return 0;
6640 }
6641
6642 static int qeth_set_csum_off(struct qeth_card *card, enum qeth_ipa_funcs cstype,
6643 enum qeth_prot_versions prot)
6644 {
6645 return qeth_send_simple_setassparms_prot(card, cstype, IPA_CMD_ASS_STOP,
6646 NULL, prot);
6647 }
6648
6649 static int qeth_set_csum_on(struct qeth_card *card, enum qeth_ipa_funcs cstype,
6650 enum qeth_prot_versions prot, u8 *lp2lp)
6651 {
6652 u32 required_features = QETH_IPA_CHECKSUM_UDP | QETH_IPA_CHECKSUM_TCP;
6653 struct qeth_cmd_buffer *iob;
6654 struct qeth_ipa_caps caps;
6655 u32 features;
6656 int rc;
6657
6658 /* some L3 HW requires combined L3+L4 csum offload: */
6659 if (IS_LAYER3(card) && prot == QETH_PROT_IPV4 &&
6660 cstype == IPA_OUTBOUND_CHECKSUM)
6661 required_features |= QETH_IPA_CHECKSUM_IP_HDR;
6662
6663 iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_START, 0,
6664 prot);
6665 if (!iob)
6666 return -ENOMEM;
6667
6668 rc = qeth_send_ipa_cmd(card, iob, qeth_start_csum_cb, &features);
6669 if (rc)
6670 return rc;
6671
6672 if ((required_features & features) != required_features) {
6673 qeth_set_csum_off(card, cstype, prot);
6674 return -EOPNOTSUPP;
6675 }
6676
6677 iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_ENABLE,
6678 SETASS_DATA_SIZEOF(flags_32bit),
6679 prot);
6680 if (!iob) {
6681 qeth_set_csum_off(card, cstype, prot);
6682 return -ENOMEM;
6683 }
6684
6685 if (features & QETH_IPA_CHECKSUM_LP2LP)
6686 required_features |= QETH_IPA_CHECKSUM_LP2LP;
6687 __ipa_cmd(iob)->data.setassparms.data.flags_32bit = required_features;
6688 rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6689 if (rc) {
6690 qeth_set_csum_off(card, cstype, prot);
6691 return rc;
6692 }
6693
6694 if (!qeth_ipa_caps_supported(&caps, required_features) ||
6695 !qeth_ipa_caps_enabled(&caps, required_features)) {
6696 qeth_set_csum_off(card, cstype, prot);
6697 return -EOPNOTSUPP;
6698 }
6699
6700 dev_info(&card->gdev->dev, "HW Checksumming (%sbound IPv%d) enabled\n",
6701 cstype == IPA_INBOUND_CHECKSUM ? "in" : "out", prot);
6702
6703 if (lp2lp)
6704 *lp2lp = qeth_ipa_caps_enabled(&caps, QETH_IPA_CHECKSUM_LP2LP);
6705
6706 return 0;
6707 }
6708
6709 static int qeth_set_ipa_csum(struct qeth_card *card, bool on, int cstype,
6710 enum qeth_prot_versions prot, u8 *lp2lp)
6711 {
6712 return on ? qeth_set_csum_on(card, cstype, prot, lp2lp) :
6713 qeth_set_csum_off(card, cstype, prot);
6714 }
6715
6716 static int qeth_start_tso_cb(struct qeth_card *card, struct qeth_reply *reply,
6717 unsigned long data)
6718 {
6719 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6720 struct qeth_tso_start_data *tso_data = reply->param;
6721
6722 if (qeth_setassparms_inspect_rc(cmd))
6723 return -EIO;
6724
6725 tso_data->mss = cmd->data.setassparms.data.tso.mss;
6726 tso_data->supported = cmd->data.setassparms.data.tso.supported;
6727 return 0;
6728 }
6729
6730 static int qeth_set_tso_off(struct qeth_card *card,
6731 enum qeth_prot_versions prot)
6732 {
6733 return qeth_send_simple_setassparms_prot(card, IPA_OUTBOUND_TSO,
6734 IPA_CMD_ASS_STOP, NULL, prot);
6735 }
6736
6737 static int qeth_set_tso_on(struct qeth_card *card,
6738 enum qeth_prot_versions prot)
6739 {
6740 struct qeth_tso_start_data tso_data;
6741 struct qeth_cmd_buffer *iob;
6742 struct qeth_ipa_caps caps;
6743 int rc;
6744
6745 iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6746 IPA_CMD_ASS_START, 0, prot);
6747 if (!iob)
6748 return -ENOMEM;
6749
6750 rc = qeth_send_ipa_cmd(card, iob, qeth_start_tso_cb, &tso_data);
6751 if (rc)
6752 return rc;
6753
6754 if (!tso_data.mss || !(tso_data.supported & QETH_IPA_LARGE_SEND_TCP)) {
6755 qeth_set_tso_off(card, prot);
6756 return -EOPNOTSUPP;
6757 }
6758
6759 iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6760 IPA_CMD_ASS_ENABLE,
6761 SETASS_DATA_SIZEOF(caps), prot);
6762 if (!iob) {
6763 qeth_set_tso_off(card, prot);
6764 return -ENOMEM;
6765 }
6766
6767 /* enable TSO capability */
6768 __ipa_cmd(iob)->data.setassparms.data.caps.enabled =
6769 QETH_IPA_LARGE_SEND_TCP;
6770 rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6771 if (rc) {
6772 qeth_set_tso_off(card, prot);
6773 return rc;
6774 }
6775
6776 if (!qeth_ipa_caps_supported(&caps, QETH_IPA_LARGE_SEND_TCP) ||
6777 !qeth_ipa_caps_enabled(&caps, QETH_IPA_LARGE_SEND_TCP)) {
6778 qeth_set_tso_off(card, prot);
6779 return -EOPNOTSUPP;
6780 }
6781
6782 dev_info(&card->gdev->dev, "TSOv%u enabled (MSS: %u)\n", prot,
6783 tso_data.mss);
6784 return 0;
6785 }
6786
6787 static int qeth_set_ipa_tso(struct qeth_card *card, bool on,
6788 enum qeth_prot_versions prot)
6789 {
6790 return on ? qeth_set_tso_on(card, prot) : qeth_set_tso_off(card, prot);
6791 }
6792
6793 static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on)
6794 {
6795 int rc_ipv4 = (on) ? -EOPNOTSUPP : 0;
6796 int rc_ipv6;
6797
6798 if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
6799 rc_ipv4 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6800 QETH_PROT_IPV4, NULL);
6801 if (!qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6802 /* no/one Offload Assist available, so the rc is trivial */
6803 return rc_ipv4;
6804
6805 rc_ipv6 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6806 QETH_PROT_IPV6, NULL);
6807
6808 if (on)
6809 /* enable: success if any Assist is active */
6810 return (rc_ipv6) ? rc_ipv4 : 0;
6811
6812 /* disable: failure if any Assist is still active */
6813 return (rc_ipv6) ? rc_ipv6 : rc_ipv4;
6814 }
6815
6816 /**
6817 * qeth_enable_hw_features() - (Re-)Enable HW functions for device features
6818 * @dev: a net_device
6819 */
6820 void qeth_enable_hw_features(struct net_device *dev)
6821 {
6822 struct qeth_card *card = dev->ml_priv;
6823 netdev_features_t features;
6824
6825 features = dev->features;
6826 /* force-off any feature that might need an IPA sequence.
6827 * netdev_update_features() will restart them.
6828 */
6829 dev->features &= ~dev->hw_features;
6830 /* toggle VLAN filter, so that VIDs are re-programmed: */
6831 if (IS_LAYER2(card) && IS_VM_NIC(card)) {
6832 dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
6833 dev->wanted_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
6834 }
6835 netdev_update_features(dev);
6836 if (features != dev->features)
6837 dev_warn(&card->gdev->dev,
6838 "Device recovery failed to restore all offload features\n");
6839 }
6840 EXPORT_SYMBOL_GPL(qeth_enable_hw_features);
6841
6842 static void qeth_check_restricted_features(struct qeth_card *card,
6843 netdev_features_t changed,
6844 netdev_features_t actual)
6845 {
6846 netdev_features_t ipv6_features = NETIF_F_TSO6;
6847 netdev_features_t ipv4_features = NETIF_F_TSO;
6848
6849 if (!card->info.has_lp2lp_cso_v6)
6850 ipv6_features |= NETIF_F_IPV6_CSUM;
6851 if (!card->info.has_lp2lp_cso_v4)
6852 ipv4_features |= NETIF_F_IP_CSUM;
6853
6854 if ((changed & ipv6_features) && !(actual & ipv6_features))
6855 qeth_flush_local_addrs6(card);
6856 if ((changed & ipv4_features) && !(actual & ipv4_features))
6857 qeth_flush_local_addrs4(card);
6858 }
6859
6860 int qeth_set_features(struct net_device *dev, netdev_features_t features)
6861 {
6862 struct qeth_card *card = dev->ml_priv;
6863 netdev_features_t changed = dev->features ^ features;
6864 int rc = 0;
6865
6866 QETH_CARD_TEXT(card, 2, "setfeat");
6867 QETH_CARD_HEX(card, 2, &features, sizeof(features));
6868
6869 if ((changed & NETIF_F_IP_CSUM)) {
6870 rc = qeth_set_ipa_csum(card, features & NETIF_F_IP_CSUM,
6871 IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV4,
6872 &card->info.has_lp2lp_cso_v4);
6873 if (rc)
6874 changed ^= NETIF_F_IP_CSUM;
6875 }
6876 if (changed & NETIF_F_IPV6_CSUM) {
6877 rc = qeth_set_ipa_csum(card, features & NETIF_F_IPV6_CSUM,
6878 IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV6,
6879 &card->info.has_lp2lp_cso_v6);
6880 if (rc)
6881 changed ^= NETIF_F_IPV6_CSUM;
6882 }
6883 if (changed & NETIF_F_RXCSUM) {
6884 rc = qeth_set_ipa_rx_csum(card, features & NETIF_F_RXCSUM);
6885 if (rc)
6886 changed ^= NETIF_F_RXCSUM;
6887 }
6888 if (changed & NETIF_F_TSO) {
6889 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO,
6890 QETH_PROT_IPV4);
6891 if (rc)
6892 changed ^= NETIF_F_TSO;
6893 }
6894 if (changed & NETIF_F_TSO6) {
6895 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO6,
6896 QETH_PROT_IPV6);
6897 if (rc)
6898 changed ^= NETIF_F_TSO6;
6899 }
6900
6901 qeth_check_restricted_features(card, dev->features ^ features,
6902 dev->features ^ changed);
6903
6904 /* everything changed successfully? */
6905 if ((dev->features ^ features) == changed)
6906 return 0;
6907 /* something went wrong. save changed features and return error */
6908 dev->features ^= changed;
6909 return -EIO;
6910 }
6911 EXPORT_SYMBOL_GPL(qeth_set_features);
6912
6913 netdev_features_t qeth_fix_features(struct net_device *dev,
6914 netdev_features_t features)
6915 {
6916 struct qeth_card *card = dev->ml_priv;
6917
6918 QETH_CARD_TEXT(card, 2, "fixfeat");
6919 if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
6920 features &= ~NETIF_F_IP_CSUM;
6921 if (!qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6))
6922 features &= ~NETIF_F_IPV6_CSUM;
6923 if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM) &&
6924 !qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6925 features &= ~NETIF_F_RXCSUM;
6926 if (!qeth_is_supported(card, IPA_OUTBOUND_TSO))
6927 features &= ~NETIF_F_TSO;
6928 if (!qeth_is_supported6(card, IPA_OUTBOUND_TSO))
6929 features &= ~NETIF_F_TSO6;
6930
6931 QETH_CARD_HEX(card, 2, &features, sizeof(features));
6932 return features;
6933 }
6934 EXPORT_SYMBOL_GPL(qeth_fix_features);
6935
6936 netdev_features_t qeth_features_check(struct sk_buff *skb,
6937 struct net_device *dev,
6938 netdev_features_t features)
6939 {
6940 struct qeth_card *card = dev->ml_priv;
6941
6942 /* Traffic with local next-hop is not eligible for some offloads: */
6943 if (skb->ip_summed == CHECKSUM_PARTIAL &&
6944 READ_ONCE(card->options.isolation) != ISOLATION_MODE_FWD) {
6945 netdev_features_t restricted = 0;
6946
6947 if (skb_is_gso(skb) && !netif_needs_gso(skb, features))
6948 restricted |= NETIF_F_ALL_TSO;
6949
6950 switch (vlan_get_protocol(skb)) {
6951 case htons(ETH_P_IP):
6952 if (!card->info.has_lp2lp_cso_v4)
6953 restricted |= NETIF_F_IP_CSUM;
6954
6955 if (restricted && qeth_next_hop_is_local_v4(card, skb))
6956 features &= ~restricted;
6957 break;
6958 case htons(ETH_P_IPV6):
6959 if (!card->info.has_lp2lp_cso_v6)
6960 restricted |= NETIF_F_IPV6_CSUM;
6961
6962 if (restricted && qeth_next_hop_is_local_v6(card, skb))
6963 features &= ~restricted;
6964 break;
6965 default:
6966 break;
6967 }
6968 }
6969
6970 /* GSO segmentation builds skbs with
6971 * a (small) linear part for the headers, and
6972 * page frags for the data.
6973 * Compared to a linear skb, the header-only part consumes an
6974 * additional buffer element. This reduces buffer utilization, and
6975 * hurts throughput. So compress small segments into one element.
6976 */
6977 if (netif_needs_gso(skb, features)) {
6978 /* match skb_segment(): */
6979 unsigned int doffset = skb->data - skb_mac_header(skb);
6980 unsigned int hsize = skb_shinfo(skb)->gso_size;
6981 unsigned int hroom = skb_headroom(skb);
6982
6983 /* linearize only if resulting skb allocations are order-0: */
6984 if (SKB_DATA_ALIGN(hroom + doffset + hsize) <= SKB_MAX_HEAD(0))
6985 features &= ~NETIF_F_SG;
6986 }
6987
6988 return vlan_features_check(skb, features);
6989 }
6990 EXPORT_SYMBOL_GPL(qeth_features_check);
6991
6992 void qeth_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
6993 {
6994 struct qeth_card *card = dev->ml_priv;
6995 struct qeth_qdio_out_q *queue;
6996 unsigned int i;
6997
6998 QETH_CARD_TEXT(card, 5, "getstat");
6999
7000 stats->rx_packets = card->stats.rx_packets;
7001 stats->rx_bytes = card->stats.rx_bytes;
7002 stats->rx_errors = card->stats.rx_length_errors +
7003 card->stats.rx_frame_errors +
7004 card->stats.rx_fifo_errors;
7005 stats->rx_dropped = card->stats.rx_dropped_nomem +
7006 card->stats.rx_dropped_notsupp +
7007 card->stats.rx_dropped_runt;
7008 stats->multicast = card->stats.rx_multicast;
7009 stats->rx_length_errors = card->stats.rx_length_errors;
7010 stats->rx_frame_errors = card->stats.rx_frame_errors;
7011 stats->rx_fifo_errors = card->stats.rx_fifo_errors;
7012
7013 for (i = 0; i < card->qdio.no_out_queues; i++) {
7014 queue = card->qdio.out_qs[i];
7015
7016 stats->tx_packets += queue->stats.tx_packets;
7017 stats->tx_bytes += queue->stats.tx_bytes;
7018 stats->tx_errors += queue->stats.tx_errors;
7019 stats->tx_dropped += queue->stats.tx_dropped;
7020 }
7021 }
7022 EXPORT_SYMBOL_GPL(qeth_get_stats64);
7023
7024 #define TC_IQD_UCAST 0
7025 static void qeth_iqd_set_prio_tc_map(struct net_device *dev,
7026 unsigned int ucast_txqs)
7027 {
7028 unsigned int prio;
7029
7030 /* IQD requires mcast traffic to be placed on a dedicated queue, and
7031 * qeth_iqd_select_queue() deals with this.
7032 * For unicast traffic, we defer the queue selection to the stack.
7033 * By installing a trivial prio map that spans over only the unicast
7034 * queues, we can encourage the stack to spread the ucast traffic evenly
7035 * without selecting the mcast queue.
7036 */
7037
7038 /* One traffic class, spanning over all active ucast queues: */
7039 netdev_set_num_tc(dev, 1);
7040 netdev_set_tc_queue(dev, TC_IQD_UCAST, ucast_txqs,
7041 QETH_IQD_MIN_UCAST_TXQ);
7042
7043 /* Map all priorities to this traffic class: */
7044 for (prio = 0; prio <= TC_BITMASK; prio++)
7045 netdev_set_prio_tc_map(dev, prio, TC_IQD_UCAST);
7046 }
7047
7048 int qeth_set_real_num_tx_queues(struct qeth_card *card, unsigned int count)
7049 {
7050 struct net_device *dev = card->dev;
7051 int rc;
7052
7053 /* Per netif_setup_tc(), adjust the mapping first: */
7054 if (IS_IQD(card))
7055 qeth_iqd_set_prio_tc_map(dev, count - 1);
7056
7057 rc = netif_set_real_num_tx_queues(dev, count);
7058
7059 if (rc && IS_IQD(card))
7060 qeth_iqd_set_prio_tc_map(dev, dev->real_num_tx_queues - 1);
7061
7062 return rc;
7063 }
7064 EXPORT_SYMBOL_GPL(qeth_set_real_num_tx_queues);
7065
7066 u16 qeth_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
7067 u8 cast_type, struct net_device *sb_dev)
7068 {
7069 u16 txq;
7070
7071 if (cast_type != RTN_UNICAST)
7072 return QETH_IQD_MCAST_TXQ;
7073 if (dev->real_num_tx_queues == QETH_IQD_MIN_TXQ)
7074 return QETH_IQD_MIN_UCAST_TXQ;
7075
7076 txq = netdev_pick_tx(dev, skb, sb_dev);
7077 return (txq == QETH_IQD_MCAST_TXQ) ? QETH_IQD_MIN_UCAST_TXQ : txq;
7078 }
7079 EXPORT_SYMBOL_GPL(qeth_iqd_select_queue);
7080
7081 int qeth_open(struct net_device *dev)
7082 {
7083 struct qeth_card *card = dev->ml_priv;
7084 struct qeth_qdio_out_q *queue;
7085 unsigned int i;
7086
7087 QETH_CARD_TEXT(card, 4, "qethopen");
7088
7089 card->data.state = CH_STATE_UP;
7090 netif_tx_start_all_queues(dev);
7091
7092 local_bh_disable();
7093 qeth_for_each_output_queue(card, queue, i) {
7094 netif_tx_napi_add(dev, &queue->napi, qeth_tx_poll,
7095 QETH_NAPI_WEIGHT);
7096 napi_enable(&queue->napi);
7097 napi_schedule(&queue->napi);
7098 }
7099
7100 napi_enable(&card->napi);
7101 napi_schedule(&card->napi);
7102 /* kick-start the NAPI softirq: */
7103 local_bh_enable();
7104
7105 return 0;
7106 }
7107 EXPORT_SYMBOL_GPL(qeth_open);
7108
7109 int qeth_stop(struct net_device *dev)
7110 {
7111 struct qeth_card *card = dev->ml_priv;
7112 struct qeth_qdio_out_q *queue;
7113 unsigned int i;
7114
7115 QETH_CARD_TEXT(card, 4, "qethstop");
7116
7117 napi_disable(&card->napi);
7118 cancel_delayed_work_sync(&card->buffer_reclaim_work);
7119 qdio_stop_irq(CARD_DDEV(card));
7120
7121 /* Quiesce the NAPI instances: */
7122 qeth_for_each_output_queue(card, queue, i)
7123 napi_disable(&queue->napi);
7124
7125 /* Stop .ndo_start_xmit, might still access queue->napi. */
7126 netif_tx_disable(dev);
7127
7128 qeth_for_each_output_queue(card, queue, i) {
7129 del_timer_sync(&queue->timer);
7130 /* Queues may get re-allocated, so remove the NAPIs. */
7131 netif_napi_del(&queue->napi);
7132 }
7133
7134 return 0;
7135 }
7136 EXPORT_SYMBOL_GPL(qeth_stop);
7137
7138 static int __init qeth_core_init(void)
7139 {
7140 int rc;
7141
7142 pr_info("loading core functions\n");
7143
7144 qeth_debugfs_root = debugfs_create_dir("qeth", NULL);
7145
7146 rc = qeth_register_dbf_views();
7147 if (rc)
7148 goto dbf_err;
7149 qeth_core_root_dev = root_device_register("qeth");
7150 rc = PTR_ERR_OR_ZERO(qeth_core_root_dev);
7151 if (rc)
7152 goto register_err;
7153 qeth_core_header_cache =
7154 kmem_cache_create("qeth_hdr", QETH_HDR_CACHE_OBJ_SIZE,
7155 roundup_pow_of_two(QETH_HDR_CACHE_OBJ_SIZE),
7156 0, NULL);
7157 if (!qeth_core_header_cache) {
7158 rc = -ENOMEM;
7159 goto slab_err;
7160 }
7161 qeth_qdio_outbuf_cache = kmem_cache_create("qeth_buf",
7162 sizeof(struct qeth_qdio_out_buffer), 0, 0, NULL);
7163 if (!qeth_qdio_outbuf_cache) {
7164 rc = -ENOMEM;
7165 goto cqslab_err;
7166 }
7167
7168 qeth_qaob_cache = kmem_cache_create("qeth_qaob",
7169 sizeof(struct qaob),
7170 sizeof(struct qaob),
7171 0, NULL);
7172 if (!qeth_qaob_cache) {
7173 rc = -ENOMEM;
7174 goto qaob_err;
7175 }
7176
7177 rc = ccw_driver_register(&qeth_ccw_driver);
7178 if (rc)
7179 goto ccw_err;
7180 rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver);
7181 if (rc)
7182 goto ccwgroup_err;
7183
7184 return 0;
7185
7186 ccwgroup_err:
7187 ccw_driver_unregister(&qeth_ccw_driver);
7188 ccw_err:
7189 kmem_cache_destroy(qeth_qaob_cache);
7190 qaob_err:
7191 kmem_cache_destroy(qeth_qdio_outbuf_cache);
7192 cqslab_err:
7193 kmem_cache_destroy(qeth_core_header_cache);
7194 slab_err:
7195 root_device_unregister(qeth_core_root_dev);
7196 register_err:
7197 qeth_unregister_dbf_views();
7198 dbf_err:
7199 debugfs_remove_recursive(qeth_debugfs_root);
7200 pr_err("Initializing the qeth device driver failed\n");
7201 return rc;
7202 }
7203
7204 static void __exit qeth_core_exit(void)
7205 {
7206 qeth_clear_dbf_list();
7207 ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver);
7208 ccw_driver_unregister(&qeth_ccw_driver);
7209 kmem_cache_destroy(qeth_qaob_cache);
7210 kmem_cache_destroy(qeth_qdio_outbuf_cache);
7211 kmem_cache_destroy(qeth_core_header_cache);
7212 root_device_unregister(qeth_core_root_dev);
7213 qeth_unregister_dbf_views();
7214 debugfs_remove_recursive(qeth_debugfs_root);
7215 pr_info("core functions removed\n");
7216 }
7217
7218 module_init(qeth_core_init);
7219 module_exit(qeth_core_exit);
7220 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
7221 MODULE_DESCRIPTION("qeth core functions");
7222 MODULE_LICENSE("GPL");
Mirror https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git