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Merge tag 'trace-printf-v6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/trace...
[drm/drm-misc.git] / drivers / s390 / net / qeth_core_main.c
bloba3adaec5504e45384eeedf8f82ee160317fcbbf5
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
356 rc = qdio_add_bufs_to_input_queue(CARD_DDEV(card), 1, 0, 127);
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 void qeth_free_cq(struct qeth_card *card)
368 {
369 if (card->qdio.c_q) {
370 qeth_free_qdio_queue(card->qdio.c_q);
371 card->qdio.c_q = NULL;
372 }
373 }
374
375 static int qeth_alloc_cq(struct qeth_card *card)
376 {
377 if (card->options.cq == QETH_CQ_ENABLED) {
378 QETH_CARD_TEXT(card, 2, "cqon");
379 if (!card->qdio.c_q) {
380 card->qdio.c_q = qeth_alloc_qdio_queue();
381 if (!card->qdio.c_q) {
382 dev_err(&card->gdev->dev,
383 "Failed to create completion queue\n");
384 return -ENOMEM;
385 }
386 }
387 } else {
388 QETH_CARD_TEXT(card, 2, "nocq");
389 qeth_free_cq(card);
390 }
391 return 0;
392 }
393
394 static enum iucv_tx_notify qeth_compute_cq_notification(int sbalf15,
395 int delayed)
396 {
397 enum iucv_tx_notify n;
398
399 switch (sbalf15) {
400 case 0:
401 n = delayed ? TX_NOTIFY_DELAYED_OK : TX_NOTIFY_OK;
402 break;
403 case 4:
404 case 16:
405 case 17:
406 case 18:
407 n = delayed ? TX_NOTIFY_DELAYED_UNREACHABLE :
408 TX_NOTIFY_UNREACHABLE;
409 break;
410 default:
411 n = delayed ? TX_NOTIFY_DELAYED_GENERALERROR :
412 TX_NOTIFY_GENERALERROR;
413 break;
414 }
415
416 return n;
417 }
418
419 static void qeth_put_cmd(struct qeth_cmd_buffer *iob)
420 {
421 if (refcount_dec_and_test(&iob->ref_count)) {
422 kfree(iob->data);
423 kfree(iob);
424 }
425 }
426 static void qeth_setup_ccw(struct ccw1 *ccw, u8 cmd_code, u8 flags, u32 len,
427 void *data)
428 {
429 ccw->cmd_code = cmd_code;
430 ccw->flags = flags | CCW_FLAG_SLI;
431 ccw->count = len;
432 ccw->cda = virt_to_dma32(data);
433 }
434
435 static int __qeth_issue_next_read(struct qeth_card *card)
436 {
437 struct qeth_cmd_buffer *iob = card->read_cmd;
438 struct qeth_channel *channel = iob->channel;
439 struct ccw1 *ccw = __ccw_from_cmd(iob);
440 int rc;
441
442 QETH_CARD_TEXT(card, 5, "issnxrd");
443 if (channel->state != CH_STATE_UP)
444 return -EIO;
445
446 memset(iob->data, 0, iob->length);
447 qeth_setup_ccw(ccw, CCW_CMD_READ, 0, iob->length, iob->data);
448 iob->callback = qeth_issue_next_read_cb;
449 /* keep the cmd alive after completion: */
450 qeth_get_cmd(iob);
451
452 QETH_CARD_TEXT(card, 6, "noirqpnd");
453 rc = ccw_device_start(channel->ccwdev, ccw, (addr_t) iob, 0, 0);
454 if (!rc) {
455 channel->active_cmd = iob;
456 } else {
457 QETH_DBF_MESSAGE(2, "error %i on device %x when starting next read ccw!\n",
458 rc, CARD_DEVID(card));
459 qeth_unlock_channel(card, channel);
460 qeth_put_cmd(iob);
461 card->read_or_write_problem = 1;
462 qeth_schedule_recovery(card);
463 }
464 return rc;
465 }
466
467 static int qeth_issue_next_read(struct qeth_card *card)
468 {
469 int ret;
470
471 spin_lock_irq(get_ccwdev_lock(CARD_RDEV(card)));
472 ret = __qeth_issue_next_read(card);
473 spin_unlock_irq(get_ccwdev_lock(CARD_RDEV(card)));
474
475 return ret;
476 }
477
478 static void qeth_enqueue_cmd(struct qeth_card *card,
479 struct qeth_cmd_buffer *iob)
480 {
481 spin_lock_irq(&card->lock);
482 list_add_tail(&iob->list_entry, &card->cmd_waiter_list);
483 spin_unlock_irq(&card->lock);
484 }
485
486 static void qeth_dequeue_cmd(struct qeth_card *card,
487 struct qeth_cmd_buffer *iob)
488 {
489 spin_lock_irq(&card->lock);
490 list_del(&iob->list_entry);
491 spin_unlock_irq(&card->lock);
492 }
493
494 static void qeth_notify_cmd(struct qeth_cmd_buffer *iob, int reason)
495 {
496 iob->rc = reason;
497 complete(&iob->done);
498 }
499
500 static void qeth_flush_local_addrs4(struct qeth_card *card)
501 {
502 struct qeth_local_addr *addr;
503 struct hlist_node *tmp;
504 unsigned int i;
505
506 spin_lock_irq(&card->local_addrs4_lock);
507 hash_for_each_safe(card->local_addrs4, i, tmp, addr, hnode) {
508 hash_del_rcu(&addr->hnode);
509 kfree_rcu(addr, rcu);
510 }
511 spin_unlock_irq(&card->local_addrs4_lock);
512 }
513
514 static void qeth_flush_local_addrs6(struct qeth_card *card)
515 {
516 struct qeth_local_addr *addr;
517 struct hlist_node *tmp;
518 unsigned int i;
519
520 spin_lock_irq(&card->local_addrs6_lock);
521 hash_for_each_safe(card->local_addrs6, i, tmp, addr, hnode) {
522 hash_del_rcu(&addr->hnode);
523 kfree_rcu(addr, rcu);
524 }
525 spin_unlock_irq(&card->local_addrs6_lock);
526 }
527
528 static void qeth_flush_local_addrs(struct qeth_card *card)
529 {
530 qeth_flush_local_addrs4(card);
531 qeth_flush_local_addrs6(card);
532 }
533
534 static void qeth_add_local_addrs4(struct qeth_card *card,
535 struct qeth_ipacmd_local_addrs4 *cmd)
536 {
537 unsigned int i;
538
539 if (cmd->addr_length !=
540 sizeof_field(struct qeth_ipacmd_local_addr4, addr)) {
541 dev_err_ratelimited(&card->gdev->dev,
542 "Dropped IPv4 ADD LOCAL ADDR event with bad length %u\n",
543 cmd->addr_length);
544 return;
545 }
546
547 spin_lock(&card->local_addrs4_lock);
548 for (i = 0; i < cmd->count; i++) {
549 unsigned int key = ipv4_addr_hash(cmd->addrs[i].addr);
550 struct qeth_local_addr *addr;
551 bool duplicate = false;
552
553 hash_for_each_possible(card->local_addrs4, addr, hnode, key) {
554 if (addr->addr.s6_addr32[3] == cmd->addrs[i].addr) {
555 duplicate = true;
556 break;
557 }
558 }
559
560 if (duplicate)
561 continue;
562
563 addr = kmalloc(sizeof(*addr), GFP_ATOMIC);
564 if (!addr) {
565 dev_err(&card->gdev->dev,
566 "Failed to allocate local addr object. Traffic to %pI4 might suffer.\n",
567 &cmd->addrs[i].addr);
568 continue;
569 }
570
571 ipv6_addr_set(&addr->addr, 0, 0, 0, cmd->addrs[i].addr);
572 hash_add_rcu(card->local_addrs4, &addr->hnode, key);
573 }
574 spin_unlock(&card->local_addrs4_lock);
575 }
576
577 static void qeth_add_local_addrs6(struct qeth_card *card,
578 struct qeth_ipacmd_local_addrs6 *cmd)
579 {
580 unsigned int i;
581
582 if (cmd->addr_length !=
583 sizeof_field(struct qeth_ipacmd_local_addr6, addr)) {
584 dev_err_ratelimited(&card->gdev->dev,
585 "Dropped IPv6 ADD LOCAL ADDR event with bad length %u\n",
586 cmd->addr_length);
587 return;
588 }
589
590 spin_lock(&card->local_addrs6_lock);
591 for (i = 0; i < cmd->count; i++) {
592 u32 key = ipv6_addr_hash(&cmd->addrs[i].addr);
593 struct qeth_local_addr *addr;
594 bool duplicate = false;
595
596 hash_for_each_possible(card->local_addrs6, addr, hnode, key) {
597 if (ipv6_addr_equal(&addr->addr, &cmd->addrs[i].addr)) {
598 duplicate = true;
599 break;
600 }
601 }
602
603 if (duplicate)
604 continue;
605
606 addr = kmalloc(sizeof(*addr), GFP_ATOMIC);
607 if (!addr) {
608 dev_err(&card->gdev->dev,
609 "Failed to allocate local addr object. Traffic to %pI6c might suffer.\n",
610 &cmd->addrs[i].addr);
611 continue;
612 }
613
614 addr->addr = cmd->addrs[i].addr;
615 hash_add_rcu(card->local_addrs6, &addr->hnode, key);
616 }
617 spin_unlock(&card->local_addrs6_lock);
618 }
619
620 static void qeth_del_local_addrs4(struct qeth_card *card,
621 struct qeth_ipacmd_local_addrs4 *cmd)
622 {
623 unsigned int i;
624
625 if (cmd->addr_length !=
626 sizeof_field(struct qeth_ipacmd_local_addr4, addr)) {
627 dev_err_ratelimited(&card->gdev->dev,
628 "Dropped IPv4 DEL LOCAL ADDR event with bad length %u\n",
629 cmd->addr_length);
630 return;
631 }
632
633 spin_lock(&card->local_addrs4_lock);
634 for (i = 0; i < cmd->count; i++) {
635 struct qeth_ipacmd_local_addr4 *addr = &cmd->addrs[i];
636 unsigned int key = ipv4_addr_hash(addr->addr);
637 struct qeth_local_addr *tmp;
638
639 hash_for_each_possible(card->local_addrs4, tmp, hnode, key) {
640 if (tmp->addr.s6_addr32[3] == addr->addr) {
641 hash_del_rcu(&tmp->hnode);
642 kfree_rcu(tmp, rcu);
643 break;
644 }
645 }
646 }
647 spin_unlock(&card->local_addrs4_lock);
648 }
649
650 static void qeth_del_local_addrs6(struct qeth_card *card,
651 struct qeth_ipacmd_local_addrs6 *cmd)
652 {
653 unsigned int i;
654
655 if (cmd->addr_length !=
656 sizeof_field(struct qeth_ipacmd_local_addr6, addr)) {
657 dev_err_ratelimited(&card->gdev->dev,
658 "Dropped IPv6 DEL LOCAL ADDR event with bad length %u\n",
659 cmd->addr_length);
660 return;
661 }
662
663 spin_lock(&card->local_addrs6_lock);
664 for (i = 0; i < cmd->count; i++) {
665 struct qeth_ipacmd_local_addr6 *addr = &cmd->addrs[i];
666 u32 key = ipv6_addr_hash(&addr->addr);
667 struct qeth_local_addr *tmp;
668
669 hash_for_each_possible(card->local_addrs6, tmp, hnode, key) {
670 if (ipv6_addr_equal(&tmp->addr, &addr->addr)) {
671 hash_del_rcu(&tmp->hnode);
672 kfree_rcu(tmp, rcu);
673 break;
674 }
675 }
676 }
677 spin_unlock(&card->local_addrs6_lock);
678 }
679
680 static bool qeth_next_hop_is_local_v4(struct qeth_card *card,
681 struct sk_buff *skb)
682 {
683 struct qeth_local_addr *tmp;
684 bool is_local = false;
685 unsigned int key;
686 __be32 next_hop;
687
688 if (hash_empty(card->local_addrs4))
689 return false;
690
691 rcu_read_lock();
692 next_hop = qeth_next_hop_v4_rcu(skb,
693 qeth_dst_check_rcu(skb, htons(ETH_P_IP)));
694 key = ipv4_addr_hash(next_hop);
695
696 hash_for_each_possible_rcu(card->local_addrs4, tmp, hnode, key) {
697 if (tmp->addr.s6_addr32[3] == next_hop) {
698 is_local = true;
699 break;
700 }
701 }
702 rcu_read_unlock();
703
704 return is_local;
705 }
706
707 static bool qeth_next_hop_is_local_v6(struct qeth_card *card,
708 struct sk_buff *skb)
709 {
710 struct qeth_local_addr *tmp;
711 struct in6_addr *next_hop;
712 bool is_local = false;
713 u32 key;
714
715 if (hash_empty(card->local_addrs6))
716 return false;
717
718 rcu_read_lock();
719 next_hop = qeth_next_hop_v6_rcu(skb,
720 qeth_dst_check_rcu(skb, htons(ETH_P_IPV6)));
721 key = ipv6_addr_hash(next_hop);
722
723 hash_for_each_possible_rcu(card->local_addrs6, tmp, hnode, key) {
724 if (ipv6_addr_equal(&tmp->addr, next_hop)) {
725 is_local = true;
726 break;
727 }
728 }
729 rcu_read_unlock();
730
731 return is_local;
732 }
733
734 static int qeth_debugfs_local_addr_show(struct seq_file *m, void *v)
735 {
736 struct qeth_card *card = m->private;
737 struct qeth_local_addr *tmp;
738 unsigned int i;
739
740 rcu_read_lock();
741 hash_for_each_rcu(card->local_addrs4, i, tmp, hnode)
742 seq_printf(m, "%pI4\n", &tmp->addr.s6_addr32[3]);
743 hash_for_each_rcu(card->local_addrs6, i, tmp, hnode)
744 seq_printf(m, "%pI6c\n", &tmp->addr);
745 rcu_read_unlock();
746
747 return 0;
748 }
749
750 DEFINE_SHOW_ATTRIBUTE(qeth_debugfs_local_addr);
751
752 static void qeth_issue_ipa_msg(struct qeth_ipa_cmd *cmd, int rc,
753 struct qeth_card *card)
754 {
755 const char *ipa_name;
756 int com = cmd->hdr.command;
757
758 ipa_name = qeth_get_ipa_cmd_name(com);
759
760 if (rc)
761 QETH_DBF_MESSAGE(2, "IPA: %s(%#x) for device %x returned %#x \"%s\"\n",
762 ipa_name, com, CARD_DEVID(card), rc,
763 qeth_get_ipa_msg(rc));
764 else
765 QETH_DBF_MESSAGE(5, "IPA: %s(%#x) for device %x succeeded\n",
766 ipa_name, com, CARD_DEVID(card));
767 }
768
769 static void qeth_default_link_info(struct qeth_card *card)
770 {
771 struct qeth_link_info *link_info = &card->info.link_info;
772
773 QETH_CARD_TEXT(card, 2, "dftlinfo");
774 link_info->duplex = DUPLEX_FULL;
775
776 if (IS_IQD(card) || IS_VM_NIC(card)) {
777 link_info->speed = SPEED_10000;
778 link_info->port = PORT_FIBRE;
779 link_info->link_mode = QETH_LINK_MODE_FIBRE_SHORT;
780 } else {
781 switch (card->info.link_type) {
782 case QETH_LINK_TYPE_FAST_ETH:
783 case QETH_LINK_TYPE_LANE_ETH100:
784 link_info->speed = SPEED_100;
785 link_info->port = PORT_TP;
786 break;
787 case QETH_LINK_TYPE_GBIT_ETH:
788 case QETH_LINK_TYPE_LANE_ETH1000:
789 link_info->speed = SPEED_1000;
790 link_info->port = PORT_FIBRE;
791 break;
792 case QETH_LINK_TYPE_10GBIT_ETH:
793 link_info->speed = SPEED_10000;
794 link_info->port = PORT_FIBRE;
795 break;
796 case QETH_LINK_TYPE_25GBIT_ETH:
797 link_info->speed = SPEED_25000;
798 link_info->port = PORT_FIBRE;
799 break;
800 default:
801 dev_info(&card->gdev->dev,
802 "Unknown link type %x\n",
803 card->info.link_type);
804 link_info->speed = SPEED_UNKNOWN;
805 link_info->port = PORT_OTHER;
806 }
807
808 link_info->link_mode = QETH_LINK_MODE_UNKNOWN;
809 }
810 }
811
812 static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card,
813 struct qeth_ipa_cmd *cmd)
814 {
815 QETH_CARD_TEXT(card, 5, "chkipad");
816
817 if (IS_IPA_REPLY(cmd)) {
818 if (cmd->hdr.command != IPA_CMD_SET_DIAG_ASS)
819 qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
820 return cmd;
821 }
822
823 /* handle unsolicited event: */
824 switch (cmd->hdr.command) {
825 case IPA_CMD_STOPLAN:
826 if (cmd->hdr.return_code == IPA_RC_VEPA_TO_VEB_TRANSITION) {
827 dev_err(&card->gdev->dev,
828 "Adjacent port of interface %s is no longer in reflective relay mode, trigger recovery\n",
829 netdev_name(card->dev));
830 /* Set offline, then probably fail to set online: */
831 qeth_schedule_recovery(card);
832 } else {
833 /* stay online for subsequent STARTLAN */
834 dev_warn(&card->gdev->dev,
835 "The link for interface %s on CHPID 0x%X failed\n",
836 netdev_name(card->dev), card->info.chpid);
837 qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
838 netif_carrier_off(card->dev);
839 qeth_default_link_info(card);
840 }
841 return NULL;
842 case IPA_CMD_STARTLAN:
843 dev_info(&card->gdev->dev,
844 "The link for %s on CHPID 0x%X has been restored\n",
845 netdev_name(card->dev), card->info.chpid);
846 if (card->info.hwtrap)
847 card->info.hwtrap = 2;
848 qeth_schedule_recovery(card);
849 return NULL;
850 case IPA_CMD_SETBRIDGEPORT_IQD:
851 case IPA_CMD_SETBRIDGEPORT_OSA:
852 case IPA_CMD_ADDRESS_CHANGE_NOTIF:
853 if (card->discipline->control_event_handler(card, cmd))
854 return cmd;
855 return NULL;
856 case IPA_CMD_REGISTER_LOCAL_ADDR:
857 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
858 qeth_add_local_addrs4(card, &cmd->data.local_addrs4);
859 else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
860 qeth_add_local_addrs6(card, &cmd->data.local_addrs6);
861
862 QETH_CARD_TEXT(card, 3, "irla");
863 return NULL;
864 case IPA_CMD_UNREGISTER_LOCAL_ADDR:
865 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
866 qeth_del_local_addrs4(card, &cmd->data.local_addrs4);
867 else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
868 qeth_del_local_addrs6(card, &cmd->data.local_addrs6);
869
870 QETH_CARD_TEXT(card, 3, "urla");
871 return NULL;
872 default:
873 QETH_DBF_MESSAGE(2, "Received data is IPA but not a reply!\n");
874 return cmd;
875 }
876 }
877
878 static void qeth_clear_ipacmd_list(struct qeth_card *card)
879 {
880 struct qeth_cmd_buffer *iob;
881 unsigned long flags;
882
883 QETH_CARD_TEXT(card, 4, "clipalst");
884
885 spin_lock_irqsave(&card->lock, flags);
886 list_for_each_entry(iob, &card->cmd_waiter_list, list_entry)
887 qeth_notify_cmd(iob, -ECANCELED);
888 spin_unlock_irqrestore(&card->lock, flags);
889 }
890
891 static int qeth_check_idx_response(struct qeth_card *card,
892 unsigned char *buffer)
893 {
894 QETH_DBF_HEX(CTRL, 2, buffer, QETH_DBF_CTRL_LEN);
895 if ((buffer[2] & QETH_IDX_TERMINATE_MASK) == QETH_IDX_TERMINATE) {
896 QETH_DBF_MESSAGE(2, "received an IDX TERMINATE with cause code %#04x\n",
897 buffer[4]);
898 QETH_CARD_TEXT(card, 2, "ckidxres");
899 QETH_CARD_TEXT(card, 2, " idxterm");
900 QETH_CARD_TEXT_(card, 2, "rc%x", buffer[4]);
901 if (buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT ||
902 buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT_VM) {
903 dev_err(&card->gdev->dev,
904 "The device does not support the configured transport mode\n");
905 return -EPROTONOSUPPORT;
906 }
907 return -EIO;
908 }
909 return 0;
910 }
911
912 static void qeth_release_buffer_cb(struct qeth_card *card,
913 struct qeth_cmd_buffer *iob,
914 unsigned int data_length)
915 {
916 qeth_put_cmd(iob);
917 }
918
919 static void qeth_cancel_cmd(struct qeth_cmd_buffer *iob, int rc)
920 {
921 qeth_notify_cmd(iob, rc);
922 qeth_put_cmd(iob);
923 }
924
925 static struct qeth_cmd_buffer *qeth_alloc_cmd(struct qeth_channel *channel,
926 unsigned int length,
927 unsigned int ccws, long timeout)
928 {
929 struct qeth_cmd_buffer *iob;
930
931 if (length > QETH_BUFSIZE)
932 return NULL;
933
934 iob = kzalloc(sizeof(*iob), GFP_KERNEL);
935 if (!iob)
936 return NULL;
937
938 iob->data = kzalloc(ALIGN(length, 8) + ccws * sizeof(struct ccw1),
939 GFP_KERNEL | GFP_DMA);
940 if (!iob->data) {
941 kfree(iob);
942 return NULL;
943 }
944
945 init_completion(&iob->done);
946 spin_lock_init(&iob->lock);
947 refcount_set(&iob->ref_count, 1);
948 iob->channel = channel;
949 iob->timeout = timeout;
950 iob->length = length;
951 return iob;
952 }
953
954 static void qeth_issue_next_read_cb(struct qeth_card *card,
955 struct qeth_cmd_buffer *iob,
956 unsigned int data_length)
957 {
958 struct qeth_cmd_buffer *request = NULL;
959 struct qeth_ipa_cmd *cmd = NULL;
960 struct qeth_reply *reply = NULL;
961 struct qeth_cmd_buffer *tmp;
962 unsigned long flags;
963 int rc = 0;
964
965 QETH_CARD_TEXT(card, 4, "sndctlcb");
966 rc = qeth_check_idx_response(card, iob->data);
967 switch (rc) {
968 case 0:
969 break;
970 case -EIO:
971 qeth_schedule_recovery(card);
972 fallthrough;
973 default:
974 qeth_clear_ipacmd_list(card);
975 goto err_idx;
976 }
977
978 cmd = __ipa_reply(iob);
979 if (cmd) {
980 cmd = qeth_check_ipa_data(card, cmd);
981 if (!cmd)
982 goto out;
983 }
984
985 /* match against pending cmd requests */
986 spin_lock_irqsave(&card->lock, flags);
987 list_for_each_entry(tmp, &card->cmd_waiter_list, list_entry) {
988 if (tmp->match && tmp->match(tmp, iob)) {
989 request = tmp;
990 /* take the object outside the lock */
991 qeth_get_cmd(request);
992 break;
993 }
994 }
995 spin_unlock_irqrestore(&card->lock, flags);
996
997 if (!request)
998 goto out;
999
1000 reply = &request->reply;
1001 if (!reply->callback) {
1002 rc = 0;
1003 goto no_callback;
1004 }
1005
1006 spin_lock_irqsave(&request->lock, flags);
1007 if (request->rc)
1008 /* Bail out when the requestor has already left: */
1009 rc = request->rc;
1010 else
1011 rc = reply->callback(card, reply, cmd ? (unsigned long)cmd :
1012 (unsigned long)iob);
1013 spin_unlock_irqrestore(&request->lock, flags);
1014
1015 no_callback:
1016 if (rc <= 0)
1017 qeth_notify_cmd(request, rc);
1018 qeth_put_cmd(request);
1019 out:
1020 memcpy(&card->seqno.pdu_hdr_ack,
1021 QETH_PDU_HEADER_SEQ_NO(iob->data),
1022 QETH_SEQ_NO_LENGTH);
1023 __qeth_issue_next_read(card);
1024 err_idx:
1025 qeth_put_cmd(iob);
1026 }
1027
1028 static int qeth_set_thread_start_bit(struct qeth_card *card,
1029 unsigned long thread)
1030 {
1031 unsigned long flags;
1032 int rc = 0;
1033
1034 spin_lock_irqsave(&card->thread_mask_lock, flags);
1035 if (!(card->thread_allowed_mask & thread))
1036 rc = -EPERM;
1037 else if (card->thread_start_mask & thread)
1038 rc = -EBUSY;
1039 else
1040 card->thread_start_mask |= thread;
1041 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1042
1043 return rc;
1044 }
1045
1046 static void qeth_clear_thread_start_bit(struct qeth_card *card,
1047 unsigned long thread)
1048 {
1049 unsigned long flags;
1050
1051 spin_lock_irqsave(&card->thread_mask_lock, flags);
1052 card->thread_start_mask &= ~thread;
1053 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1054 wake_up(&card->wait_q);
1055 }
1056
1057 static void qeth_clear_thread_running_bit(struct qeth_card *card,
1058 unsigned long thread)
1059 {
1060 unsigned long flags;
1061
1062 spin_lock_irqsave(&card->thread_mask_lock, flags);
1063 card->thread_running_mask &= ~thread;
1064 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1065 wake_up_all(&card->wait_q);
1066 }
1067
1068 static int __qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
1069 {
1070 unsigned long flags;
1071 int rc = 0;
1072
1073 spin_lock_irqsave(&card->thread_mask_lock, flags);
1074 if (card->thread_start_mask & thread) {
1075 if ((card->thread_allowed_mask & thread) &&
1076 !(card->thread_running_mask & thread)) {
1077 rc = 1;
1078 card->thread_start_mask &= ~thread;
1079 card->thread_running_mask |= thread;
1080 } else
1081 rc = -EPERM;
1082 }
1083 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1084 return rc;
1085 }
1086
1087 static int qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
1088 {
1089 int rc = 0;
1090
1091 wait_event(card->wait_q,
1092 (rc = __qeth_do_run_thread(card, thread)) >= 0);
1093 return rc;
1094 }
1095
1096 int qeth_schedule_recovery(struct qeth_card *card)
1097 {
1098 int rc;
1099
1100 QETH_CARD_TEXT(card, 2, "startrec");
1101
1102 rc = qeth_set_thread_start_bit(card, QETH_RECOVER_THREAD);
1103 if (!rc)
1104 schedule_work(&card->kernel_thread_starter);
1105
1106 return rc;
1107 }
1108
1109 static int qeth_get_problem(struct qeth_card *card, struct ccw_device *cdev,
1110 struct irb *irb)
1111 {
1112 int dstat, cstat;
1113 char *sense;
1114
1115 sense = (char *) irb->ecw;
1116 cstat = irb->scsw.cmd.cstat;
1117 dstat = irb->scsw.cmd.dstat;
1118
1119 if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK |
1120 SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK |
1121 SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) {
1122 QETH_CARD_TEXT(card, 2, "CGENCHK");
1123 dev_warn(&cdev->dev, "The qeth device driver "
1124 "failed to recover an error on the device\n");
1125 QETH_DBF_MESSAGE(2, "check on channel %x with dstat=%#x, cstat=%#x\n",
1126 CCW_DEVID(cdev), dstat, cstat);
1127 print_hex_dump(KERN_WARNING, "qeth: irb ", DUMP_PREFIX_OFFSET,
1128 16, 1, irb, 64, 1);
1129 return -EIO;
1130 }
1131
1132 if (dstat & DEV_STAT_UNIT_CHECK) {
1133 if (sense[SENSE_RESETTING_EVENT_BYTE] &
1134 SENSE_RESETTING_EVENT_FLAG) {
1135 QETH_CARD_TEXT(card, 2, "REVIND");
1136 return -EIO;
1137 }
1138 if (sense[SENSE_COMMAND_REJECT_BYTE] &
1139 SENSE_COMMAND_REJECT_FLAG) {
1140 QETH_CARD_TEXT(card, 2, "CMDREJi");
1141 return -EIO;
1142 }
1143 if ((sense[2] == 0xaf) && (sense[3] == 0xfe)) {
1144 QETH_CARD_TEXT(card, 2, "AFFE");
1145 return -EIO;
1146 }
1147 if ((!sense[0]) && (!sense[1]) && (!sense[2]) && (!sense[3])) {
1148 QETH_CARD_TEXT(card, 2, "ZEROSEN");
1149 return 0;
1150 }
1151 QETH_CARD_TEXT(card, 2, "DGENCHK");
1152 return -EIO;
1153 }
1154 return 0;
1155 }
1156
1157 static int qeth_check_irb_error(struct qeth_card *card, struct ccw_device *cdev,
1158 struct irb *irb)
1159 {
1160 if (!IS_ERR(irb))
1161 return 0;
1162
1163 switch (PTR_ERR(irb)) {
1164 case -EIO:
1165 QETH_DBF_MESSAGE(2, "i/o-error on channel %x\n",
1166 CCW_DEVID(cdev));
1167 QETH_CARD_TEXT(card, 2, "ckirberr");
1168 QETH_CARD_TEXT_(card, 2, " rc%d", -EIO);
1169 return -EIO;
1170 case -ETIMEDOUT:
1171 dev_warn(&cdev->dev, "A hardware operation timed out"
1172 " on the device\n");
1173 QETH_CARD_TEXT(card, 2, "ckirberr");
1174 QETH_CARD_TEXT_(card, 2, " rc%d", -ETIMEDOUT);
1175 return -ETIMEDOUT;
1176 default:
1177 QETH_DBF_MESSAGE(2, "unknown error %ld on channel %x\n",
1178 PTR_ERR(irb), CCW_DEVID(cdev));
1179 QETH_CARD_TEXT(card, 2, "ckirberr");
1180 QETH_CARD_TEXT(card, 2, " rc???");
1181 return PTR_ERR(irb);
1182 }
1183 }
1184
1185 /**
1186 * qeth_irq() - qeth interrupt handler
1187 * @cdev: ccw device
1188 * @intparm: expect pointer to iob
1189 * @irb: Interruption Response Block
1190 *
1191 * In the good path:
1192 * corresponding qeth channel is locked with last used iob as active_cmd.
1193 * But this function is also called for error interrupts.
1194 *
1195 * Caller ensures that:
1196 * Interrupts are disabled; ccw device lock is held;
1197 *
1198 */
1199 static void qeth_irq(struct ccw_device *cdev, unsigned long intparm,
1200 struct irb *irb)
1201 {
1202 int rc;
1203 int cstat, dstat;
1204 struct qeth_cmd_buffer *iob = NULL;
1205 struct ccwgroup_device *gdev;
1206 struct qeth_channel *channel;
1207 struct qeth_card *card;
1208
1209 /* while we hold the ccwdev lock, this stays valid: */
1210 gdev = dev_get_drvdata(&cdev->dev);
1211 card = dev_get_drvdata(&gdev->dev);
1212
1213 QETH_CARD_TEXT(card, 5, "irq");
1214
1215 if (card->read.ccwdev == cdev) {
1216 channel = &card->read;
1217 QETH_CARD_TEXT(card, 5, "read");
1218 } else if (card->write.ccwdev == cdev) {
1219 channel = &card->write;
1220 QETH_CARD_TEXT(card, 5, "write");
1221 } else {
1222 channel = &card->data;
1223 QETH_CARD_TEXT(card, 5, "data");
1224 }
1225
1226 if (intparm == 0) {
1227 QETH_CARD_TEXT(card, 5, "irqunsol");
1228 } else if ((addr_t)intparm != (addr_t)channel->active_cmd) {
1229 QETH_CARD_TEXT(card, 5, "irqunexp");
1230
1231 dev_err(&cdev->dev,
1232 "Received IRQ with intparm %lx, expected %px\n",
1233 intparm, channel->active_cmd);
1234 if (channel->active_cmd)
1235 qeth_cancel_cmd(channel->active_cmd, -EIO);
1236 } else {
1237 iob = (struct qeth_cmd_buffer *) (addr_t)intparm;
1238 }
1239
1240 rc = qeth_check_irb_error(card, cdev, irb);
1241 if (rc) {
1242 /* IO was terminated, free its resources. */
1243 qeth_unlock_channel(card, channel);
1244 if (iob)
1245 qeth_cancel_cmd(iob, rc);
1246 return;
1247 }
1248
1249 if (irb->scsw.cmd.fctl & SCSW_FCTL_CLEAR_FUNC) {
1250 channel->state = CH_STATE_STOPPED;
1251 wake_up(&card->wait_q);
1252 }
1253
1254 if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) {
1255 channel->state = CH_STATE_HALTED;
1256 wake_up(&card->wait_q);
1257 }
1258
1259 if (iob && (irb->scsw.cmd.fctl & (SCSW_FCTL_CLEAR_FUNC |
1260 SCSW_FCTL_HALT_FUNC))) {
1261 qeth_cancel_cmd(iob, -ECANCELED);
1262 iob = NULL;
1263 }
1264
1265 cstat = irb->scsw.cmd.cstat;
1266 dstat = irb->scsw.cmd.dstat;
1267
1268 if ((dstat & DEV_STAT_UNIT_EXCEP) ||
1269 (dstat & DEV_STAT_UNIT_CHECK) ||
1270 (cstat)) {
1271 if (irb->esw.esw0.erw.cons) {
1272 dev_warn(&channel->ccwdev->dev,
1273 "The qeth device driver failed to recover "
1274 "an error on the device\n");
1275 QETH_DBF_MESSAGE(2, "sense data available on channel %x: cstat %#X dstat %#X\n",
1276 CCW_DEVID(channel->ccwdev), cstat,
1277 dstat);
1278 print_hex_dump(KERN_WARNING, "qeth: irb ",
1279 DUMP_PREFIX_OFFSET, 16, 1, irb, 32, 1);
1280 print_hex_dump(KERN_WARNING, "qeth: sense data ",
1281 DUMP_PREFIX_OFFSET, 16, 1, irb->ecw, 32, 1);
1282 }
1283
1284 rc = qeth_get_problem(card, cdev, irb);
1285 if (rc) {
1286 card->read_or_write_problem = 1;
1287 qeth_unlock_channel(card, channel);
1288 if (iob)
1289 qeth_cancel_cmd(iob, rc);
1290 qeth_clear_ipacmd_list(card);
1291 qeth_schedule_recovery(card);
1292 return;
1293 }
1294 }
1295
1296 if (scsw_cmd_is_valid_cc(&irb->scsw) && irb->scsw.cmd.cc == 1 && iob) {
1297 /* channel command hasn't started: retry.
1298 * active_cmd is still set to last iob
1299 */
1300 QETH_CARD_TEXT(card, 2, "irqcc1");
1301 rc = ccw_device_start_timeout(cdev, __ccw_from_cmd(iob),
1302 (addr_t)iob, 0, 0, iob->timeout);
1303 if (rc) {
1304 QETH_DBF_MESSAGE(2,
1305 "ccw retry on %x failed, rc = %i\n",
1306 CARD_DEVID(card), rc);
1307 QETH_CARD_TEXT_(card, 2, " err%d", rc);
1308 qeth_unlock_channel(card, channel);
1309 qeth_cancel_cmd(iob, rc);
1310 }
1311 return;
1312 }
1313
1314 qeth_unlock_channel(card, channel);
1315
1316 if (iob) {
1317 /* sanity check: */
1318 if (irb->scsw.cmd.count > iob->length) {
1319 qeth_cancel_cmd(iob, -EIO);
1320 return;
1321 }
1322 if (iob->callback)
1323 iob->callback(card, iob,
1324 iob->length - irb->scsw.cmd.count);
1325 }
1326 }
1327
1328 static void qeth_notify_skbs(struct qeth_qdio_out_q *q,
1329 struct qeth_qdio_out_buffer *buf,
1330 enum iucv_tx_notify notification)
1331 {
1332 struct sk_buff *skb;
1333
1334 skb_queue_walk(&buf->skb_list, skb) {
1335 struct sock *sk = skb->sk;
1336
1337 QETH_CARD_TEXT_(q->card, 5, "skbn%d", notification);
1338 QETH_CARD_TEXT_(q->card, 5, "%lx", (long) skb);
1339 if (sk && sk->sk_family == PF_IUCV)
1340 iucv_sk(sk)->sk_txnotify(sk, notification);
1341 }
1342 }
1343
1344 static void qeth_tx_complete_buf(struct qeth_qdio_out_q *queue,
1345 struct qeth_qdio_out_buffer *buf, bool error,
1346 int budget)
1347 {
1348 struct sk_buff *skb;
1349
1350 /* Empty buffer? */
1351 if (buf->next_element_to_fill == 0)
1352 return;
1353
1354 QETH_TXQ_STAT_INC(queue, bufs);
1355 QETH_TXQ_STAT_ADD(queue, buf_elements, buf->next_element_to_fill);
1356 if (error) {
1357 QETH_TXQ_STAT_ADD(queue, tx_errors, buf->frames);
1358 } else {
1359 QETH_TXQ_STAT_ADD(queue, tx_packets, buf->frames);
1360 QETH_TXQ_STAT_ADD(queue, tx_bytes, buf->bytes);
1361 }
1362
1363 while ((skb = __skb_dequeue(&buf->skb_list)) != NULL) {
1364 unsigned int bytes = qdisc_pkt_len(skb);
1365 bool is_tso = skb_is_gso(skb);
1366 unsigned int packets;
1367
1368 packets = is_tso ? skb_shinfo(skb)->gso_segs : 1;
1369 if (!error) {
1370 if (skb->ip_summed == CHECKSUM_PARTIAL)
1371 QETH_TXQ_STAT_ADD(queue, skbs_csum, packets);
1372 if (skb_is_nonlinear(skb))
1373 QETH_TXQ_STAT_INC(queue, skbs_sg);
1374 if (is_tso) {
1375 QETH_TXQ_STAT_INC(queue, skbs_tso);
1376 QETH_TXQ_STAT_ADD(queue, tso_bytes, bytes);
1377 }
1378 }
1379
1380 napi_consume_skb(skb, budget);
1381 }
1382 }
1383
1384 static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
1385 struct qeth_qdio_out_buffer *buf,
1386 bool error, int budget)
1387 {
1388 int i;
1389
1390 /* is PCI flag set on buffer? */
1391 if (buf->buffer->element[0].sflags & SBAL_SFLAGS0_PCI_REQ) {
1392 atomic_dec(&queue->set_pci_flags_count);
1393 QETH_TXQ_STAT_INC(queue, completion_irq);
1394 }
1395
1396 qeth_tx_complete_buf(queue, buf, error, budget);
1397
1398 for (i = 0; i < queue->max_elements; ++i) {
1399 void *data = dma64_to_virt(buf->buffer->element[i].addr);
1400
1401 if (__test_and_clear_bit(i, buf->from_kmem_cache) && data)
1402 kmem_cache_free(qeth_core_header_cache, data);
1403 }
1404
1405 qeth_scrub_qdio_buffer(buf->buffer, queue->max_elements);
1406 buf->next_element_to_fill = 0;
1407 buf->frames = 0;
1408 buf->bytes = 0;
1409 atomic_set(&buf->state, QETH_QDIO_BUF_EMPTY);
1410 }
1411
1412 static void qeth_free_out_buf(struct qeth_qdio_out_buffer *buf)
1413 {
1414 if (buf->aob)
1415 kmem_cache_free(qeth_qaob_cache, buf->aob);
1416 kmem_cache_free(qeth_qdio_outbuf_cache, buf);
1417 }
1418
1419 static void qeth_tx_complete_pending_bufs(struct qeth_card *card,
1420 struct qeth_qdio_out_q *queue,
1421 bool drain, int budget)
1422 {
1423 struct qeth_qdio_out_buffer *buf, *tmp;
1424
1425 list_for_each_entry_safe(buf, tmp, &queue->pending_bufs, list_entry) {
1426 struct qeth_qaob_priv1 *priv;
1427 struct qaob *aob = buf->aob;
1428 enum iucv_tx_notify notify;
1429 unsigned int i;
1430
1431 priv = (struct qeth_qaob_priv1 *)&aob->user1;
1432 if (drain || READ_ONCE(priv->state) == QETH_QAOB_DONE) {
1433 QETH_CARD_TEXT(card, 5, "fp");
1434 QETH_CARD_TEXT_(card, 5, "%lx", (long) buf);
1435
1436 notify = drain ? TX_NOTIFY_GENERALERROR :
1437 qeth_compute_cq_notification(aob->aorc, 1);
1438 qeth_notify_skbs(queue, buf, notify);
1439 qeth_tx_complete_buf(queue, buf, drain, budget);
1440
1441 for (i = 0;
1442 i < aob->sb_count && i < queue->max_elements;
1443 i++) {
1444 void *data = dma64_to_virt(aob->sba[i]);
1445
1446 if (test_bit(i, buf->from_kmem_cache) && data)
1447 kmem_cache_free(qeth_core_header_cache,
1448 data);
1449 }
1450
1451 list_del(&buf->list_entry);
1452 qeth_free_out_buf(buf);
1453 }
1454 }
1455 }
1456
1457 static void qeth_drain_output_queue(struct qeth_qdio_out_q *q, bool free)
1458 {
1459 int j;
1460
1461 qeth_tx_complete_pending_bufs(q->card, q, true, 0);
1462
1463 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
1464 if (!q->bufs[j])
1465 continue;
1466
1467 qeth_clear_output_buffer(q, q->bufs[j], true, 0);
1468 if (free) {
1469 qeth_free_out_buf(q->bufs[j]);
1470 q->bufs[j] = NULL;
1471 }
1472 }
1473 }
1474
1475 static void qeth_drain_output_queues(struct qeth_card *card)
1476 {
1477 int i;
1478
1479 QETH_CARD_TEXT(card, 2, "clearqdbf");
1480 /* clear outbound buffers to free skbs */
1481 for (i = 0; i < card->qdio.no_out_queues; ++i) {
1482 if (card->qdio.out_qs[i])
1483 qeth_drain_output_queue(card->qdio.out_qs[i], false);
1484 }
1485 }
1486
1487 static void qeth_osa_set_output_queues(struct qeth_card *card, bool single)
1488 {
1489 unsigned int max = single ? 1 : card->dev->num_tx_queues;
1490
1491 if (card->qdio.no_out_queues == max)
1492 return;
1493
1494 if (atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED)
1495 qeth_free_qdio_queues(card);
1496
1497 if (max == 1 && card->qdio.do_prio_queueing != QETH_PRIOQ_DEFAULT)
1498 dev_info(&card->gdev->dev, "Priority Queueing not supported\n");
1499
1500 card->qdio.no_out_queues = max;
1501 }
1502
1503 static int qeth_update_from_chp_desc(struct qeth_card *card)
1504 {
1505 struct ccw_device *ccwdev;
1506 struct channel_path_desc_fmt0 *chp_dsc;
1507
1508 QETH_CARD_TEXT(card, 2, "chp_desc");
1509
1510 ccwdev = card->data.ccwdev;
1511 chp_dsc = ccw_device_get_chp_desc(ccwdev, 0);
1512 if (!chp_dsc)
1513 return -ENOMEM;
1514
1515 card->info.func_level = 0x4100 + chp_dsc->desc;
1516
1517 if (IS_OSD(card) || IS_OSX(card))
1518 /* CHPP field bit 6 == 1 -> single queue */
1519 qeth_osa_set_output_queues(card, chp_dsc->chpp & 0x02);
1520
1521 kfree(chp_dsc);
1522 QETH_CARD_TEXT_(card, 2, "nr:%x", card->qdio.no_out_queues);
1523 QETH_CARD_TEXT_(card, 2, "lvl:%02x", card->info.func_level);
1524 return 0;
1525 }
1526
1527 static void qeth_init_qdio_info(struct qeth_card *card)
1528 {
1529 QETH_CARD_TEXT(card, 4, "intqdinf");
1530 atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
1531 card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT;
1532 card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
1533
1534 /* inbound */
1535 card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
1536 if (IS_IQD(card))
1537 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_HSDEFAULT;
1538 else
1539 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_DEFAULT;
1540 card->qdio.in_buf_pool.buf_count = card->qdio.init_pool.buf_count;
1541 INIT_LIST_HEAD(&card->qdio.in_buf_pool.entry_list);
1542 INIT_LIST_HEAD(&card->qdio.init_pool.entry_list);
1543 }
1544
1545 static void qeth_set_initial_options(struct qeth_card *card)
1546 {
1547 card->options.route4.type = NO_ROUTER;
1548 card->options.route6.type = NO_ROUTER;
1549 card->options.isolation = ISOLATION_MODE_NONE;
1550 card->options.cq = QETH_CQ_DISABLED;
1551 card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
1552 }
1553
1554 static int qeth_do_start_thread(struct qeth_card *card, unsigned long thread)
1555 {
1556 unsigned long flags;
1557 int rc = 0;
1558
1559 spin_lock_irqsave(&card->thread_mask_lock, flags);
1560 QETH_CARD_TEXT_(card, 4, " %02x%02x%02x",
1561 (u8) card->thread_start_mask,
1562 (u8) card->thread_allowed_mask,
1563 (u8) card->thread_running_mask);
1564 rc = (card->thread_start_mask & thread);
1565 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1566 return rc;
1567 }
1568
1569 static int qeth_do_reset(void *data);
1570 static void qeth_start_kernel_thread(struct work_struct *work)
1571 {
1572 struct task_struct *ts;
1573 struct qeth_card *card = container_of(work, struct qeth_card,
1574 kernel_thread_starter);
1575 QETH_CARD_TEXT(card, 2, "strthrd");
1576
1577 if (card->read.state != CH_STATE_UP &&
1578 card->write.state != CH_STATE_UP)
1579 return;
1580 if (qeth_do_start_thread(card, QETH_RECOVER_THREAD)) {
1581 ts = kthread_run(qeth_do_reset, card, "qeth_recover");
1582 if (IS_ERR(ts)) {
1583 qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1584 qeth_clear_thread_running_bit(card,
1585 QETH_RECOVER_THREAD);
1586 }
1587 }
1588 }
1589
1590 static void qeth_buffer_reclaim_work(struct work_struct *);
1591 static void qeth_setup_card(struct qeth_card *card)
1592 {
1593 QETH_CARD_TEXT(card, 2, "setupcrd");
1594
1595 card->info.type = CARD_RDEV(card)->id.driver_info;
1596 card->state = CARD_STATE_DOWN;
1597 spin_lock_init(&card->lock);
1598 spin_lock_init(&card->thread_mask_lock);
1599 mutex_init(&card->conf_mutex);
1600 mutex_init(&card->discipline_mutex);
1601 INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread);
1602 INIT_LIST_HEAD(&card->cmd_waiter_list);
1603 init_waitqueue_head(&card->wait_q);
1604 qeth_set_initial_options(card);
1605 /* IP address takeover */
1606 INIT_LIST_HEAD(&card->ipato.entries);
1607 qeth_init_qdio_info(card);
1608 INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work);
1609 hash_init(card->rx_mode_addrs);
1610 hash_init(card->local_addrs4);
1611 hash_init(card->local_addrs6);
1612 spin_lock_init(&card->local_addrs4_lock);
1613 spin_lock_init(&card->local_addrs6_lock);
1614 }
1615
1616 static void qeth_core_sl_print(struct seq_file *m, struct service_level *slr)
1617 {
1618 struct qeth_card *card = container_of(slr, struct qeth_card,
1619 qeth_service_level);
1620 if (card->info.mcl_level[0])
1621 seq_printf(m, "qeth: %s firmware level %s\n",
1622 CARD_BUS_ID(card), card->info.mcl_level);
1623 }
1624
1625 static struct qeth_card *qeth_alloc_card(struct ccwgroup_device *gdev)
1626 {
1627 struct qeth_card *card;
1628
1629 QETH_DBF_TEXT(SETUP, 2, "alloccrd");
1630 card = kzalloc(sizeof(*card), GFP_KERNEL);
1631 if (!card)
1632 goto out;
1633 QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1634
1635 card->gdev = gdev;
1636 dev_set_drvdata(&gdev->dev, card);
1637 CARD_RDEV(card) = gdev->cdev[0];
1638 CARD_WDEV(card) = gdev->cdev[1];
1639 CARD_DDEV(card) = gdev->cdev[2];
1640
1641 card->event_wq = alloc_ordered_workqueue("%s_event", 0,
1642 dev_name(&gdev->dev));
1643 if (!card->event_wq)
1644 goto out_wq;
1645
1646 card->read_cmd = qeth_alloc_cmd(&card->read, QETH_BUFSIZE, 1, 0);
1647 if (!card->read_cmd)
1648 goto out_read_cmd;
1649
1650 card->debugfs = debugfs_create_dir(dev_name(&gdev->dev),
1651 qeth_debugfs_root);
1652 debugfs_create_file("local_addrs", 0400, card->debugfs, card,
1653 &qeth_debugfs_local_addr_fops);
1654
1655 card->qeth_service_level.seq_print = qeth_core_sl_print;
1656 register_service_level(&card->qeth_service_level);
1657 return card;
1658
1659 out_read_cmd:
1660 destroy_workqueue(card->event_wq);
1661 out_wq:
1662 dev_set_drvdata(&gdev->dev, NULL);
1663 kfree(card);
1664 out:
1665 return NULL;
1666 }
1667
1668 static int qeth_clear_channel(struct qeth_card *card,
1669 struct qeth_channel *channel)
1670 {
1671 int rc;
1672
1673 QETH_CARD_TEXT(card, 3, "clearch");
1674 spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1675 rc = ccw_device_clear(channel->ccwdev, (addr_t)channel->active_cmd);
1676 spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1677
1678 if (rc)
1679 return rc;
1680 rc = wait_event_interruptible_timeout(card->wait_q,
1681 channel->state == CH_STATE_STOPPED, QETH_TIMEOUT);
1682 if (rc == -ERESTARTSYS)
1683 return rc;
1684 if (channel->state != CH_STATE_STOPPED)
1685 return -ETIME;
1686 channel->state = CH_STATE_DOWN;
1687 return 0;
1688 }
1689
1690 static int qeth_halt_channel(struct qeth_card *card,
1691 struct qeth_channel *channel)
1692 {
1693 int rc;
1694
1695 QETH_CARD_TEXT(card, 3, "haltch");
1696 spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1697 rc = ccw_device_halt(channel->ccwdev, (addr_t)channel->active_cmd);
1698 spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1699
1700 if (rc)
1701 return rc;
1702 rc = wait_event_interruptible_timeout(card->wait_q,
1703 channel->state == CH_STATE_HALTED, QETH_TIMEOUT);
1704 if (rc == -ERESTARTSYS)
1705 return rc;
1706 if (channel->state != CH_STATE_HALTED)
1707 return -ETIME;
1708 return 0;
1709 }
1710
1711 static int qeth_stop_channel(struct qeth_channel *channel)
1712 {
1713 struct ccw_device *cdev = channel->ccwdev;
1714 int rc;
1715
1716 rc = ccw_device_set_offline(cdev);
1717
1718 spin_lock_irq(get_ccwdev_lock(cdev));
1719 if (channel->active_cmd)
1720 dev_err(&cdev->dev, "Stopped channel while cmd %px was still active\n",
1721 channel->active_cmd);
1722
1723 cdev->handler = NULL;
1724 spin_unlock_irq(get_ccwdev_lock(cdev));
1725
1726 return rc;
1727 }
1728
1729 static int qeth_start_channel(struct qeth_channel *channel)
1730 {
1731 struct ccw_device *cdev = channel->ccwdev;
1732 int rc;
1733
1734 channel->state = CH_STATE_DOWN;
1735 xchg(&channel->active_cmd, NULL);
1736
1737 spin_lock_irq(get_ccwdev_lock(cdev));
1738 cdev->handler = qeth_irq;
1739 spin_unlock_irq(get_ccwdev_lock(cdev));
1740
1741 rc = ccw_device_set_online(cdev);
1742 if (rc)
1743 goto err;
1744
1745 return 0;
1746
1747 err:
1748 spin_lock_irq(get_ccwdev_lock(cdev));
1749 cdev->handler = NULL;
1750 spin_unlock_irq(get_ccwdev_lock(cdev));
1751 return rc;
1752 }
1753
1754 static int qeth_halt_channels(struct qeth_card *card)
1755 {
1756 int rc1 = 0, rc2 = 0, rc3 = 0;
1757
1758 QETH_CARD_TEXT(card, 3, "haltchs");
1759 rc1 = qeth_halt_channel(card, &card->read);
1760 rc2 = qeth_halt_channel(card, &card->write);
1761 rc3 = qeth_halt_channel(card, &card->data);
1762 if (rc1)
1763 return rc1;
1764 if (rc2)
1765 return rc2;
1766 return rc3;
1767 }
1768
1769 static int qeth_clear_channels(struct qeth_card *card)
1770 {
1771 int rc1 = 0, rc2 = 0, rc3 = 0;
1772
1773 QETH_CARD_TEXT(card, 3, "clearchs");
1774 rc1 = qeth_clear_channel(card, &card->read);
1775 rc2 = qeth_clear_channel(card, &card->write);
1776 rc3 = qeth_clear_channel(card, &card->data);
1777 if (rc1)
1778 return rc1;
1779 if (rc2)
1780 return rc2;
1781 return rc3;
1782 }
1783
1784 static int qeth_clear_halt_card(struct qeth_card *card, int halt)
1785 {
1786 int rc = 0;
1787
1788 QETH_CARD_TEXT(card, 3, "clhacrd");
1789
1790 if (halt)
1791 rc = qeth_halt_channels(card);
1792 if (rc)
1793 return rc;
1794 return qeth_clear_channels(card);
1795 }
1796
1797 static int qeth_qdio_clear_card(struct qeth_card *card, int use_halt)
1798 {
1799 int rc = 0;
1800
1801 QETH_CARD_TEXT(card, 3, "qdioclr");
1802 switch (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ESTABLISHED,
1803 QETH_QDIO_CLEANING)) {
1804 case QETH_QDIO_ESTABLISHED:
1805 if (IS_IQD(card))
1806 rc = qdio_shutdown(CARD_DDEV(card),
1807 QDIO_FLAG_CLEANUP_USING_HALT);
1808 else
1809 rc = qdio_shutdown(CARD_DDEV(card),
1810 QDIO_FLAG_CLEANUP_USING_CLEAR);
1811 if (rc)
1812 QETH_CARD_TEXT_(card, 3, "1err%d", rc);
1813 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
1814 break;
1815 case QETH_QDIO_CLEANING:
1816 return rc;
1817 default:
1818 break;
1819 }
1820 rc = qeth_clear_halt_card(card, use_halt);
1821 if (rc)
1822 QETH_CARD_TEXT_(card, 3, "2err%d", rc);
1823 return rc;
1824 }
1825
1826 static enum qeth_discipline_id qeth_vm_detect_layer(struct qeth_card *card)
1827 {
1828 enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1829 struct diag26c_vnic_resp *response = NULL;
1830 struct diag26c_vnic_req *request = NULL;
1831 struct ccw_dev_id id;
1832 char userid[80];
1833 int rc = 0;
1834
1835 QETH_CARD_TEXT(card, 2, "vmlayer");
1836
1837 cpcmd("QUERY USERID", userid, sizeof(userid), &rc);
1838 if (rc)
1839 goto out;
1840
1841 request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
1842 response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
1843 if (!request || !response) {
1844 rc = -ENOMEM;
1845 goto out;
1846 }
1847
1848 ccw_device_get_id(CARD_RDEV(card), &id);
1849 request->resp_buf_len = sizeof(*response);
1850 request->resp_version = DIAG26C_VERSION6_VM65918;
1851 request->req_format = DIAG26C_VNIC_INFO;
1852 ASCEBC(userid, 8);
1853 memcpy(&request->sys_name, userid, 8);
1854 request->devno = id.devno;
1855
1856 QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1857 rc = diag26c(request, response, DIAG26C_PORT_VNIC);
1858 QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1859 if (rc)
1860 goto out;
1861 QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
1862
1863 if (request->resp_buf_len < sizeof(*response) ||
1864 response->version != request->resp_version) {
1865 rc = -EIO;
1866 goto out;
1867 }
1868
1869 if (response->protocol == VNIC_INFO_PROT_L2)
1870 disc = QETH_DISCIPLINE_LAYER2;
1871 else if (response->protocol == VNIC_INFO_PROT_L3)
1872 disc = QETH_DISCIPLINE_LAYER3;
1873
1874 out:
1875 kfree(response);
1876 kfree(request);
1877 if (rc)
1878 QETH_CARD_TEXT_(card, 2, "err%x", rc);
1879 return disc;
1880 }
1881
1882 /* Determine whether the device requires a specific layer discipline */
1883 static enum qeth_discipline_id qeth_enforce_discipline(struct qeth_card *card)
1884 {
1885 enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1886
1887 if (IS_OSM(card))
1888 disc = QETH_DISCIPLINE_LAYER2;
1889 else if (IS_VM_NIC(card))
1890 disc = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
1891 qeth_vm_detect_layer(card);
1892
1893 switch (disc) {
1894 case QETH_DISCIPLINE_LAYER2:
1895 QETH_CARD_TEXT(card, 3, "force l2");
1896 break;
1897 case QETH_DISCIPLINE_LAYER3:
1898 QETH_CARD_TEXT(card, 3, "force l3");
1899 break;
1900 default:
1901 QETH_CARD_TEXT(card, 3, "force no");
1902 }
1903
1904 return disc;
1905 }
1906
1907 static void qeth_set_blkt_defaults(struct qeth_card *card)
1908 {
1909 QETH_CARD_TEXT(card, 2, "cfgblkt");
1910
1911 if (card->info.use_v1_blkt) {
1912 card->info.blkt.time_total = 0;
1913 card->info.blkt.inter_packet = 0;
1914 card->info.blkt.inter_packet_jumbo = 0;
1915 } else {
1916 card->info.blkt.time_total = 250;
1917 card->info.blkt.inter_packet = 5;
1918 card->info.blkt.inter_packet_jumbo = 15;
1919 }
1920 }
1921
1922 static void qeth_idx_init(struct qeth_card *card)
1923 {
1924 memset(&card->seqno, 0, sizeof(card->seqno));
1925
1926 card->token.issuer_rm_w = 0x00010103UL;
1927 card->token.cm_filter_w = 0x00010108UL;
1928 card->token.cm_connection_w = 0x0001010aUL;
1929 card->token.ulp_filter_w = 0x0001010bUL;
1930 card->token.ulp_connection_w = 0x0001010dUL;
1931
1932 switch (card->info.type) {
1933 case QETH_CARD_TYPE_IQD:
1934 card->info.func_level = QETH_IDX_FUNC_LEVEL_IQD;
1935 break;
1936 case QETH_CARD_TYPE_OSD:
1937 card->info.func_level = QETH_IDX_FUNC_LEVEL_OSD;
1938 break;
1939 default:
1940 break;
1941 }
1942 }
1943
1944 static void qeth_idx_finalize_cmd(struct qeth_card *card,
1945 struct qeth_cmd_buffer *iob)
1946 {
1947 memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data), &card->seqno.trans_hdr,
1948 QETH_SEQ_NO_LENGTH);
1949 if (iob->channel == &card->write)
1950 card->seqno.trans_hdr++;
1951 }
1952
1953 static int qeth_peer_func_level(int level)
1954 {
1955 if ((level & 0xff) == 8)
1956 return (level & 0xff) + 0x400;
1957 if (((level >> 8) & 3) == 1)
1958 return (level & 0xff) + 0x200;
1959 return level;
1960 }
1961
1962 static void qeth_mpc_finalize_cmd(struct qeth_card *card,
1963 struct qeth_cmd_buffer *iob)
1964 {
1965 qeth_idx_finalize_cmd(card, iob);
1966
1967 memcpy(QETH_PDU_HEADER_SEQ_NO(iob->data),
1968 &card->seqno.pdu_hdr, QETH_SEQ_NO_LENGTH);
1969 card->seqno.pdu_hdr++;
1970 memcpy(QETH_PDU_HEADER_ACK_SEQ_NO(iob->data),
1971 &card->seqno.pdu_hdr_ack, QETH_SEQ_NO_LENGTH);
1972
1973 iob->callback = qeth_release_buffer_cb;
1974 }
1975
1976 static bool qeth_mpc_match_reply(struct qeth_cmd_buffer *iob,
1977 struct qeth_cmd_buffer *reply)
1978 {
1979 /* MPC cmds are issued strictly in sequence. */
1980 return !IS_IPA(reply->data);
1981 }
1982
1983 static struct qeth_cmd_buffer *qeth_mpc_alloc_cmd(struct qeth_card *card,
1984 const void *data,
1985 unsigned int data_length)
1986 {
1987 struct qeth_cmd_buffer *iob;
1988
1989 iob = qeth_alloc_cmd(&card->write, data_length, 1, QETH_TIMEOUT);
1990 if (!iob)
1991 return NULL;
1992
1993 memcpy(iob->data, data, data_length);
1994 qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, data_length,
1995 iob->data);
1996 iob->finalize = qeth_mpc_finalize_cmd;
1997 iob->match = qeth_mpc_match_reply;
1998 return iob;
1999 }
2000
2001 /**
2002 * qeth_send_control_data() - send control command to the card
2003 * @card: qeth_card structure pointer
2004 * @iob: qeth_cmd_buffer pointer
2005 * @reply_cb: callback function pointer
2006 * cb_card: pointer to the qeth_card structure
2007 * cb_reply: pointer to the qeth_reply structure
2008 * cb_cmd: pointer to the original iob for non-IPA
2009 * commands, or to the qeth_ipa_cmd structure
2010 * for the IPA commands.
2011 * @reply_param: private pointer passed to the callback
2012 *
2013 * Callback function gets called one or more times, with cb_cmd
2014 * pointing to the response returned by the hardware. Callback
2015 * function must return
2016 * > 0 if more reply blocks are expected,
2017 * 0 if the last or only reply block is received, and
2018 * < 0 on error.
2019 * Callback function can get the value of the reply_param pointer from the
2020 * field 'param' of the structure qeth_reply.
2021 */
2022
2023 static int qeth_send_control_data(struct qeth_card *card,
2024 struct qeth_cmd_buffer *iob,
2025 int (*reply_cb)(struct qeth_card *cb_card,
2026 struct qeth_reply *cb_reply,
2027 unsigned long cb_cmd),
2028 void *reply_param)
2029 {
2030 struct qeth_channel *channel = iob->channel;
2031 struct qeth_reply *reply = &iob->reply;
2032 long timeout = iob->timeout;
2033 int rc;
2034
2035 QETH_CARD_TEXT(card, 2, "sendctl");
2036
2037 reply->callback = reply_cb;
2038 reply->param = reply_param;
2039
2040 timeout = wait_event_interruptible_timeout(card->wait_q,
2041 qeth_trylock_channel(channel, iob),
2042 timeout);
2043 if (timeout <= 0) {
2044 qeth_put_cmd(iob);
2045 return (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
2046 }
2047
2048 if (iob->finalize)
2049 iob->finalize(card, iob);
2050 QETH_DBF_HEX(CTRL, 2, iob->data, min(iob->length, QETH_DBF_CTRL_LEN));
2051
2052 qeth_enqueue_cmd(card, iob);
2053
2054 /* This pairs with iob->callback, and keeps the iob alive after IO: */
2055 qeth_get_cmd(iob);
2056
2057 QETH_CARD_TEXT(card, 6, "noirqpnd");
2058 spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
2059 rc = ccw_device_start_timeout(channel->ccwdev, __ccw_from_cmd(iob),
2060 (addr_t) iob, 0, 0, timeout);
2061 spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
2062 if (rc) {
2063 QETH_DBF_MESSAGE(2, "qeth_send_control_data on device %x: ccw_device_start rc = %i\n",
2064 CARD_DEVID(card), rc);
2065 QETH_CARD_TEXT_(card, 2, " err%d", rc);
2066 qeth_dequeue_cmd(card, iob);
2067 qeth_put_cmd(iob);
2068 qeth_unlock_channel(card, channel);
2069 goto out;
2070 }
2071
2072 timeout = wait_for_completion_interruptible_timeout(&iob->done,
2073 timeout);
2074 if (timeout <= 0)
2075 rc = (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
2076
2077 qeth_dequeue_cmd(card, iob);
2078
2079 if (reply_cb) {
2080 /* Wait until the callback for a late reply has completed: */
2081 spin_lock_irq(&iob->lock);
2082 if (rc)
2083 /* Zap any callback that's still pending: */
2084 iob->rc = rc;
2085 spin_unlock_irq(&iob->lock);
2086 }
2087
2088 if (!rc)
2089 rc = iob->rc;
2090
2091 out:
2092 qeth_put_cmd(iob);
2093 return rc;
2094 }
2095
2096 struct qeth_node_desc {
2097 struct node_descriptor nd1;
2098 struct node_descriptor nd2;
2099 struct node_descriptor nd3;
2100 };
2101
2102 static void qeth_read_conf_data_cb(struct qeth_card *card,
2103 struct qeth_cmd_buffer *iob,
2104 unsigned int data_length)
2105 {
2106 struct qeth_node_desc *nd = (struct qeth_node_desc *) iob->data;
2107 int rc = 0;
2108 u8 *tag;
2109
2110 QETH_CARD_TEXT(card, 2, "cfgunit");
2111
2112 if (data_length < sizeof(*nd)) {
2113 rc = -EINVAL;
2114 goto out;
2115 }
2116
2117 card->info.is_vm_nic = nd->nd1.plant[0] == _ascebc['V'] &&
2118 nd->nd1.plant[1] == _ascebc['M'];
2119 tag = (u8 *)&nd->nd1.tag;
2120 card->info.chpid = tag[0];
2121 card->info.unit_addr2 = tag[1];
2122
2123 tag = (u8 *)&nd->nd2.tag;
2124 card->info.cula = tag[1];
2125
2126 card->info.use_v1_blkt = nd->nd3.model[0] == 0xF0 &&
2127 nd->nd3.model[1] == 0xF0 &&
2128 nd->nd3.model[2] >= 0xF1 &&
2129 nd->nd3.model[2] <= 0xF4;
2130
2131 out:
2132 qeth_notify_cmd(iob, rc);
2133 qeth_put_cmd(iob);
2134 }
2135
2136 static int qeth_read_conf_data(struct qeth_card *card)
2137 {
2138 struct qeth_channel *channel = &card->data;
2139 struct qeth_cmd_buffer *iob;
2140 struct ciw *ciw;
2141
2142 /* scan for RCD command in extended SenseID data */
2143 ciw = ccw_device_get_ciw(channel->ccwdev, CIW_TYPE_RCD);
2144 if (!ciw || ciw->cmd == 0)
2145 return -EOPNOTSUPP;
2146 if (ciw->count < sizeof(struct qeth_node_desc))
2147 return -EINVAL;
2148
2149 iob = qeth_alloc_cmd(channel, ciw->count, 1, QETH_RCD_TIMEOUT);
2150 if (!iob)
2151 return -ENOMEM;
2152
2153 iob->callback = qeth_read_conf_data_cb;
2154 qeth_setup_ccw(__ccw_from_cmd(iob), ciw->cmd, 0, iob->length,
2155 iob->data);
2156
2157 return qeth_send_control_data(card, iob, NULL, NULL);
2158 }
2159
2160 static int qeth_idx_check_activate_response(struct qeth_card *card,
2161 struct qeth_channel *channel,
2162 struct qeth_cmd_buffer *iob)
2163 {
2164 int rc;
2165
2166 rc = qeth_check_idx_response(card, iob->data);
2167 if (rc)
2168 return rc;
2169
2170 if (QETH_IS_IDX_ACT_POS_REPLY(iob->data))
2171 return 0;
2172
2173 /* negative reply: */
2174 QETH_CARD_TEXT_(card, 2, "idxneg%c",
2175 QETH_IDX_ACT_CAUSE_CODE(iob->data));
2176
2177 switch (QETH_IDX_ACT_CAUSE_CODE(iob->data)) {
2178 case QETH_IDX_ACT_ERR_EXCL:
2179 dev_err(&channel->ccwdev->dev,
2180 "The adapter is used exclusively by another host\n");
2181 return -EBUSY;
2182 case QETH_IDX_ACT_ERR_AUTH:
2183 case QETH_IDX_ACT_ERR_AUTH_USER:
2184 dev_err(&channel->ccwdev->dev,
2185 "Setting the device online failed because of insufficient authorization\n");
2186 return -EPERM;
2187 default:
2188 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: negative reply\n",
2189 CCW_DEVID(channel->ccwdev));
2190 return -EIO;
2191 }
2192 }
2193
2194 static void qeth_idx_activate_read_channel_cb(struct qeth_card *card,
2195 struct qeth_cmd_buffer *iob,
2196 unsigned int data_length)
2197 {
2198 struct qeth_channel *channel = iob->channel;
2199 u16 peer_level;
2200 int rc;
2201
2202 QETH_CARD_TEXT(card, 2, "idxrdcb");
2203
2204 rc = qeth_idx_check_activate_response(card, channel, iob);
2205 if (rc)
2206 goto out;
2207
2208 memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2209 if (peer_level != qeth_peer_func_level(card->info.func_level)) {
2210 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
2211 CCW_DEVID(channel->ccwdev),
2212 card->info.func_level, peer_level);
2213 rc = -EINVAL;
2214 goto out;
2215 }
2216
2217 memcpy(&card->token.issuer_rm_r,
2218 QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2219 QETH_MPC_TOKEN_LENGTH);
2220 memcpy(&card->info.mcl_level[0],
2221 QETH_IDX_REPLY_LEVEL(iob->data), QETH_MCL_LENGTH);
2222
2223 out:
2224 qeth_notify_cmd(iob, rc);
2225 qeth_put_cmd(iob);
2226 }
2227
2228 static void qeth_idx_activate_write_channel_cb(struct qeth_card *card,
2229 struct qeth_cmd_buffer *iob,
2230 unsigned int data_length)
2231 {
2232 struct qeth_channel *channel = iob->channel;
2233 u16 peer_level;
2234 int rc;
2235
2236 QETH_CARD_TEXT(card, 2, "idxwrcb");
2237
2238 rc = qeth_idx_check_activate_response(card, channel, iob);
2239 if (rc)
2240 goto out;
2241
2242 memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2243 if ((peer_level & ~0x0100) !=
2244 qeth_peer_func_level(card->info.func_level)) {
2245 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
2246 CCW_DEVID(channel->ccwdev),
2247 card->info.func_level, peer_level);
2248 rc = -EINVAL;
2249 }
2250
2251 out:
2252 qeth_notify_cmd(iob, rc);
2253 qeth_put_cmd(iob);
2254 }
2255
2256 static void qeth_idx_setup_activate_cmd(struct qeth_card *card,
2257 struct qeth_cmd_buffer *iob)
2258 {
2259 u16 addr = (card->info.cula << 8) + card->info.unit_addr2;
2260 u8 port = ((u8)card->dev->dev_port) | 0x80;
2261 struct ccw1 *ccw = __ccw_from_cmd(iob);
2262
2263 qeth_setup_ccw(&ccw[0], CCW_CMD_WRITE, CCW_FLAG_CC, IDX_ACTIVATE_SIZE,
2264 iob->data);
2265 qeth_setup_ccw(&ccw[1], CCW_CMD_READ, 0, iob->length, iob->data);
2266 iob->finalize = qeth_idx_finalize_cmd;
2267
2268 port |= QETH_IDX_ACT_INVAL_FRAME;
2269 memcpy(QETH_IDX_ACT_PNO(iob->data), &port, 1);
2270 memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2271 &card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH);
2272 memcpy(QETH_IDX_ACT_FUNC_LEVEL(iob->data),
2273 &card->info.func_level, 2);
2274 memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &card->info.ddev_devno, 2);
2275 memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &addr, 2);
2276 }
2277
2278 static int qeth_idx_activate_read_channel(struct qeth_card *card)
2279 {
2280 struct qeth_channel *channel = &card->read;
2281 struct qeth_cmd_buffer *iob;
2282 int rc;
2283
2284 QETH_CARD_TEXT(card, 2, "idxread");
2285
2286 iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
2287 if (!iob)
2288 return -ENOMEM;
2289
2290 memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE);
2291 qeth_idx_setup_activate_cmd(card, iob);
2292 iob->callback = qeth_idx_activate_read_channel_cb;
2293
2294 rc = qeth_send_control_data(card, iob, NULL, NULL);
2295 if (rc)
2296 return rc;
2297
2298 channel->state = CH_STATE_UP;
2299 return 0;
2300 }
2301
2302 static int qeth_idx_activate_write_channel(struct qeth_card *card)
2303 {
2304 struct qeth_channel *channel = &card->write;
2305 struct qeth_cmd_buffer *iob;
2306 int rc;
2307
2308 QETH_CARD_TEXT(card, 2, "idxwrite");
2309
2310 iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
2311 if (!iob)
2312 return -ENOMEM;
2313
2314 memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE);
2315 qeth_idx_setup_activate_cmd(card, iob);
2316 iob->callback = qeth_idx_activate_write_channel_cb;
2317
2318 rc = qeth_send_control_data(card, iob, NULL, NULL);
2319 if (rc)
2320 return rc;
2321
2322 channel->state = CH_STATE_UP;
2323 return 0;
2324 }
2325
2326 static int qeth_cm_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2327 unsigned long data)
2328 {
2329 struct qeth_cmd_buffer *iob;
2330
2331 QETH_CARD_TEXT(card, 2, "cmenblcb");
2332
2333 iob = (struct qeth_cmd_buffer *) data;
2334 memcpy(&card->token.cm_filter_r,
2335 QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data),
2336 QETH_MPC_TOKEN_LENGTH);
2337 return 0;
2338 }
2339
2340 static int qeth_cm_enable(struct qeth_card *card)
2341 {
2342 struct qeth_cmd_buffer *iob;
2343
2344 QETH_CARD_TEXT(card, 2, "cmenable");
2345
2346 iob = qeth_mpc_alloc_cmd(card, CM_ENABLE, CM_ENABLE_SIZE);
2347 if (!iob)
2348 return -ENOMEM;
2349
2350 memcpy(QETH_CM_ENABLE_ISSUER_RM_TOKEN(iob->data),
2351 &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2352 memcpy(QETH_CM_ENABLE_FILTER_TOKEN(iob->data),
2353 &card->token.cm_filter_w, QETH_MPC_TOKEN_LENGTH);
2354
2355 return qeth_send_control_data(card, iob, qeth_cm_enable_cb, NULL);
2356 }
2357
2358 static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2359 unsigned long data)
2360 {
2361 struct qeth_cmd_buffer *iob;
2362
2363 QETH_CARD_TEXT(card, 2, "cmsetpcb");
2364
2365 iob = (struct qeth_cmd_buffer *) data;
2366 memcpy(&card->token.cm_connection_r,
2367 QETH_CM_SETUP_RESP_DEST_ADDR(iob->data),
2368 QETH_MPC_TOKEN_LENGTH);
2369 return 0;
2370 }
2371
2372 static int qeth_cm_setup(struct qeth_card *card)
2373 {
2374 struct qeth_cmd_buffer *iob;
2375
2376 QETH_CARD_TEXT(card, 2, "cmsetup");
2377
2378 iob = qeth_mpc_alloc_cmd(card, CM_SETUP, CM_SETUP_SIZE);
2379 if (!iob)
2380 return -ENOMEM;
2381
2382 memcpy(QETH_CM_SETUP_DEST_ADDR(iob->data),
2383 &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2384 memcpy(QETH_CM_SETUP_CONNECTION_TOKEN(iob->data),
2385 &card->token.cm_connection_w, QETH_MPC_TOKEN_LENGTH);
2386 memcpy(QETH_CM_SETUP_FILTER_TOKEN(iob->data),
2387 &card->token.cm_filter_r, QETH_MPC_TOKEN_LENGTH);
2388 return qeth_send_control_data(card, iob, qeth_cm_setup_cb, NULL);
2389 }
2390
2391 static bool qeth_is_supported_link_type(struct qeth_card *card, u8 link_type)
2392 {
2393 if (link_type == QETH_LINK_TYPE_LANE_TR ||
2394 link_type == QETH_LINK_TYPE_HSTR) {
2395 dev_err(&card->gdev->dev, "Unsupported Token Ring device\n");
2396 return false;
2397 }
2398
2399 return true;
2400 }
2401
2402 static int qeth_update_max_mtu(struct qeth_card *card, unsigned int max_mtu)
2403 {
2404 struct net_device *dev = card->dev;
2405 unsigned int new_mtu;
2406
2407 if (!max_mtu) {
2408 /* IQD needs accurate max MTU to set up its RX buffers: */
2409 if (IS_IQD(card))
2410 return -EINVAL;
2411 /* tolerate quirky HW: */
2412 max_mtu = ETH_MAX_MTU;
2413 }
2414
2415 rtnl_lock();
2416 if (IS_IQD(card)) {
2417 /* move any device with default MTU to new max MTU: */
2418 new_mtu = (dev->mtu == dev->max_mtu) ? max_mtu : dev->mtu;
2419
2420 /* adjust RX buffer size to new max MTU: */
2421 card->qdio.in_buf_size = max_mtu + 2 * PAGE_SIZE;
2422 if (dev->max_mtu && dev->max_mtu != max_mtu)
2423 qeth_free_qdio_queues(card);
2424 } else {
2425 if (dev->mtu)
2426 new_mtu = dev->mtu;
2427 /* default MTUs for first setup: */
2428 else if (IS_LAYER2(card))
2429 new_mtu = ETH_DATA_LEN;
2430 else
2431 new_mtu = ETH_DATA_LEN - 8; /* allow for LLC + SNAP */
2432 }
2433
2434 dev->max_mtu = max_mtu;
2435 dev->mtu = min(new_mtu, max_mtu);
2436 rtnl_unlock();
2437 return 0;
2438 }
2439
2440 static int qeth_get_mtu_outof_framesize(int framesize)
2441 {
2442 switch (framesize) {
2443 case 0x4000:
2444 return 8192;
2445 case 0x6000:
2446 return 16384;
2447 case 0xa000:
2448 return 32768;
2449 case 0xffff:
2450 return 57344;
2451 default:
2452 return 0;
2453 }
2454 }
2455
2456 static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2457 unsigned long data)
2458 {
2459 __u16 mtu, framesize;
2460 __u16 len;
2461 struct qeth_cmd_buffer *iob;
2462 u8 link_type = 0;
2463
2464 QETH_CARD_TEXT(card, 2, "ulpenacb");
2465
2466 iob = (struct qeth_cmd_buffer *) data;
2467 memcpy(&card->token.ulp_filter_r,
2468 QETH_ULP_ENABLE_RESP_FILTER_TOKEN(iob->data),
2469 QETH_MPC_TOKEN_LENGTH);
2470 if (IS_IQD(card)) {
2471 memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2);
2472 mtu = qeth_get_mtu_outof_framesize(framesize);
2473 } else {
2474 mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data);
2475 }
2476 *(u16 *)reply->param = mtu;
2477
2478 memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2);
2479 if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) {
2480 memcpy(&link_type,
2481 QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1);
2482 if (!qeth_is_supported_link_type(card, link_type))
2483 return -EPROTONOSUPPORT;
2484 }
2485
2486 card->info.link_type = link_type;
2487 QETH_CARD_TEXT_(card, 2, "link%d", card->info.link_type);
2488 return 0;
2489 }
2490
2491 static u8 qeth_mpc_select_prot_type(struct qeth_card *card)
2492 {
2493 return IS_LAYER2(card) ? QETH_MPC_PROT_L2 : QETH_MPC_PROT_L3;
2494 }
2495
2496 static int qeth_ulp_enable(struct qeth_card *card)
2497 {
2498 u8 prot_type = qeth_mpc_select_prot_type(card);
2499 struct qeth_cmd_buffer *iob;
2500 u16 max_mtu;
2501 int rc;
2502
2503 QETH_CARD_TEXT(card, 2, "ulpenabl");
2504
2505 iob = qeth_mpc_alloc_cmd(card, ULP_ENABLE, ULP_ENABLE_SIZE);
2506 if (!iob)
2507 return -ENOMEM;
2508
2509 *(QETH_ULP_ENABLE_LINKNUM(iob->data)) = (u8) card->dev->dev_port;
2510 memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1);
2511 memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data),
2512 &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2513 memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data),
2514 &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH);
2515 rc = qeth_send_control_data(card, iob, qeth_ulp_enable_cb, &max_mtu);
2516 if (rc)
2517 return rc;
2518 return qeth_update_max_mtu(card, max_mtu);
2519 }
2520
2521 static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2522 unsigned long data)
2523 {
2524 struct qeth_cmd_buffer *iob;
2525
2526 QETH_CARD_TEXT(card, 2, "ulpstpcb");
2527
2528 iob = (struct qeth_cmd_buffer *) data;
2529 memcpy(&card->token.ulp_connection_r,
2530 QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2531 QETH_MPC_TOKEN_LENGTH);
2532 if (!strncmp("00S", QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2533 3)) {
2534 QETH_CARD_TEXT(card, 2, "olmlimit");
2535 dev_err(&card->gdev->dev, "A connection could not be "
2536 "established because of an OLM limit\n");
2537 return -EMLINK;
2538 }
2539 return 0;
2540 }
2541
2542 static int qeth_ulp_setup(struct qeth_card *card)
2543 {
2544 __u16 temp;
2545 struct qeth_cmd_buffer *iob;
2546
2547 QETH_CARD_TEXT(card, 2, "ulpsetup");
2548
2549 iob = qeth_mpc_alloc_cmd(card, ULP_SETUP, ULP_SETUP_SIZE);
2550 if (!iob)
2551 return -ENOMEM;
2552
2553 memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data),
2554 &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2555 memcpy(QETH_ULP_SETUP_CONNECTION_TOKEN(iob->data),
2556 &card->token.ulp_connection_w, QETH_MPC_TOKEN_LENGTH);
2557 memcpy(QETH_ULP_SETUP_FILTER_TOKEN(iob->data),
2558 &card->token.ulp_filter_r, QETH_MPC_TOKEN_LENGTH);
2559
2560 memcpy(QETH_ULP_SETUP_CUA(iob->data), &card->info.ddev_devno, 2);
2561 temp = (card->info.cula << 8) + card->info.unit_addr2;
2562 memcpy(QETH_ULP_SETUP_REAL_DEVADDR(iob->data), &temp, 2);
2563 return qeth_send_control_data(card, iob, qeth_ulp_setup_cb, NULL);
2564 }
2565
2566 static int qeth_alloc_out_buf(struct qeth_qdio_out_q *q, unsigned int bidx,
2567 gfp_t gfp)
2568 {
2569 struct qeth_qdio_out_buffer *newbuf;
2570
2571 newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, gfp);
2572 if (!newbuf)
2573 return -ENOMEM;
2574
2575 newbuf->buffer = q->qdio_bufs[bidx];
2576 skb_queue_head_init(&newbuf->skb_list);
2577 lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key);
2578 atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY);
2579 q->bufs[bidx] = newbuf;
2580 return 0;
2581 }
2582
2583 static void qeth_free_output_queue(struct qeth_qdio_out_q *q)
2584 {
2585 if (!q)
2586 return;
2587
2588 qeth_drain_output_queue(q, true);
2589 qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2590 kfree(q);
2591 }
2592
2593 static struct qeth_qdio_out_q *qeth_alloc_output_queue(void)
2594 {
2595 struct qeth_qdio_out_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
2596 unsigned int i;
2597
2598 if (!q)
2599 return NULL;
2600
2601 if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q))
2602 goto err_qdio_bufs;
2603
2604 for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) {
2605 if (qeth_alloc_out_buf(q, i, GFP_KERNEL))
2606 goto err_out_bufs;
2607 }
2608
2609 return q;
2610
2611 err_out_bufs:
2612 while (i > 0)
2613 qeth_free_out_buf(q->bufs[--i]);
2614 qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2615 err_qdio_bufs:
2616 kfree(q);
2617 return NULL;
2618 }
2619
2620 static void qeth_tx_completion_timer(struct timer_list *timer)
2621 {
2622 struct qeth_qdio_out_q *queue = from_timer(queue, timer, timer);
2623
2624 napi_schedule(&queue->napi);
2625 QETH_TXQ_STAT_INC(queue, completion_timer);
2626 }
2627
2628 static int qeth_alloc_qdio_queues(struct qeth_card *card)
2629 {
2630 unsigned int i;
2631
2632 QETH_CARD_TEXT(card, 2, "allcqdbf");
2633
2634 /* completion */
2635 if (qeth_alloc_cq(card))
2636 goto out_err;
2637
2638 if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED,
2639 QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED)
2640 return 0;
2641
2642 /* inbound buffer pool */
2643 if (qeth_alloc_buffer_pool(card))
2644 goto out_buffer_pool;
2645
2646 /* outbound */
2647 for (i = 0; i < card->qdio.no_out_queues; ++i) {
2648 struct qeth_qdio_out_q *queue;
2649
2650 queue = qeth_alloc_output_queue();
2651 if (!queue)
2652 goto out_freeoutq;
2653 QETH_CARD_TEXT_(card, 2, "outq %i", i);
2654 QETH_CARD_HEX(card, 2, &queue, sizeof(void *));
2655 card->qdio.out_qs[i] = queue;
2656 queue->card = card;
2657 queue->queue_no = i;
2658 INIT_LIST_HEAD(&queue->pending_bufs);
2659 spin_lock_init(&queue->lock);
2660 timer_setup(&queue->timer, qeth_tx_completion_timer, 0);
2661 if (IS_IQD(card)) {
2662 queue->coalesce_usecs = QETH_TX_COALESCE_USECS;
2663 queue->max_coalesced_frames = QETH_TX_MAX_COALESCED_FRAMES;
2664 queue->rescan_usecs = QETH_TX_TIMER_USECS;
2665 } else {
2666 queue->coalesce_usecs = USEC_PER_SEC;
2667 queue->max_coalesced_frames = 0;
2668 queue->rescan_usecs = 10 * USEC_PER_SEC;
2669 }
2670 queue->priority = QETH_QIB_PQUE_PRIO_DEFAULT;
2671 }
2672
2673 return 0;
2674
2675 out_freeoutq:
2676 while (i > 0) {
2677 qeth_free_output_queue(card->qdio.out_qs[--i]);
2678 card->qdio.out_qs[i] = NULL;
2679 }
2680 qeth_free_buffer_pool(card);
2681 out_buffer_pool:
2682 atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
2683 qeth_free_cq(card);
2684 out_err:
2685 return -ENOMEM;
2686 }
2687
2688 static void qeth_free_qdio_queues(struct qeth_card *card)
2689 {
2690 int i, j;
2691
2692 qeth_free_cq(card);
2693
2694 if (atomic_xchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED) ==
2695 QETH_QDIO_UNINITIALIZED)
2696 return;
2697
2698 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2699 if (card->qdio.in_q->bufs[j].rx_skb) {
2700 consume_skb(card->qdio.in_q->bufs[j].rx_skb);
2701 card->qdio.in_q->bufs[j].rx_skb = NULL;
2702 }
2703 }
2704
2705 /* inbound buffer pool */
2706 qeth_free_buffer_pool(card);
2707 /* free outbound qdio_qs */
2708 for (i = 0; i < card->qdio.no_out_queues; i++) {
2709 qeth_free_output_queue(card->qdio.out_qs[i]);
2710 card->qdio.out_qs[i] = NULL;
2711 }
2712 }
2713
2714 static void qeth_fill_qib_parms(struct qeth_card *card,
2715 struct qeth_qib_parms *parms)
2716 {
2717 struct qeth_qdio_out_q *queue;
2718 unsigned int i;
2719
2720 parms->pcit_magic[0] = 'P';
2721 parms->pcit_magic[1] = 'C';
2722 parms->pcit_magic[2] = 'I';
2723 parms->pcit_magic[3] = 'T';
2724 ASCEBC(parms->pcit_magic, sizeof(parms->pcit_magic));
2725 parms->pcit_a = QETH_PCI_THRESHOLD_A(card);
2726 parms->pcit_b = QETH_PCI_THRESHOLD_B(card);
2727 parms->pcit_c = QETH_PCI_TIMER_VALUE(card);
2728
2729 parms->blkt_magic[0] = 'B';
2730 parms->blkt_magic[1] = 'L';
2731 parms->blkt_magic[2] = 'K';
2732 parms->blkt_magic[3] = 'T';
2733 ASCEBC(parms->blkt_magic, sizeof(parms->blkt_magic));
2734 parms->blkt_total = card->info.blkt.time_total;
2735 parms->blkt_inter_packet = card->info.blkt.inter_packet;
2736 parms->blkt_inter_packet_jumbo = card->info.blkt.inter_packet_jumbo;
2737
2738 /* Prio-queueing implicitly uses the default priorities: */
2739 if (qeth_uses_tx_prio_queueing(card) || card->qdio.no_out_queues == 1)
2740 return;
2741
2742 parms->pque_magic[0] = 'P';
2743 parms->pque_magic[1] = 'Q';
2744 parms->pque_magic[2] = 'U';
2745 parms->pque_magic[3] = 'E';
2746 ASCEBC(parms->pque_magic, sizeof(parms->pque_magic));
2747 parms->pque_order = QETH_QIB_PQUE_ORDER_RR;
2748 parms->pque_units = QETH_QIB_PQUE_UNITS_SBAL;
2749
2750 qeth_for_each_output_queue(card, queue, i)
2751 parms->pque_priority[i] = queue->priority;
2752 }
2753
2754 static int qeth_qdio_activate(struct qeth_card *card)
2755 {
2756 QETH_CARD_TEXT(card, 3, "qdioact");
2757 return qdio_activate(CARD_DDEV(card));
2758 }
2759
2760 static int qeth_dm_act(struct qeth_card *card)
2761 {
2762 struct qeth_cmd_buffer *iob;
2763
2764 QETH_CARD_TEXT(card, 2, "dmact");
2765
2766 iob = qeth_mpc_alloc_cmd(card, DM_ACT, DM_ACT_SIZE);
2767 if (!iob)
2768 return -ENOMEM;
2769
2770 memcpy(QETH_DM_ACT_DEST_ADDR(iob->data),
2771 &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2772 memcpy(QETH_DM_ACT_CONNECTION_TOKEN(iob->data),
2773 &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2774 return qeth_send_control_data(card, iob, NULL, NULL);
2775 }
2776
2777 static int qeth_mpc_initialize(struct qeth_card *card)
2778 {
2779 int rc;
2780
2781 QETH_CARD_TEXT(card, 2, "mpcinit");
2782
2783 rc = qeth_issue_next_read(card);
2784 if (rc) {
2785 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
2786 return rc;
2787 }
2788 rc = qeth_cm_enable(card);
2789 if (rc) {
2790 QETH_CARD_TEXT_(card, 2, "2err%d", rc);
2791 return rc;
2792 }
2793 rc = qeth_cm_setup(card);
2794 if (rc) {
2795 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
2796 return rc;
2797 }
2798 rc = qeth_ulp_enable(card);
2799 if (rc) {
2800 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
2801 return rc;
2802 }
2803 rc = qeth_ulp_setup(card);
2804 if (rc) {
2805 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2806 return rc;
2807 }
2808 rc = qeth_alloc_qdio_queues(card);
2809 if (rc) {
2810 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2811 return rc;
2812 }
2813 rc = qeth_qdio_establish(card);
2814 if (rc) {
2815 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
2816 qeth_free_qdio_queues(card);
2817 return rc;
2818 }
2819 rc = qeth_qdio_activate(card);
2820 if (rc) {
2821 QETH_CARD_TEXT_(card, 2, "7err%d", rc);
2822 return rc;
2823 }
2824 rc = qeth_dm_act(card);
2825 if (rc) {
2826 QETH_CARD_TEXT_(card, 2, "8err%d", rc);
2827 return rc;
2828 }
2829
2830 return 0;
2831 }
2832
2833 static void qeth_print_status_message(struct qeth_card *card)
2834 {
2835 switch (card->info.type) {
2836 case QETH_CARD_TYPE_OSD:
2837 case QETH_CARD_TYPE_OSM:
2838 case QETH_CARD_TYPE_OSX:
2839 /* VM will use a non-zero first character
2840 * to indicate a HiperSockets like reporting
2841 * of the level OSA sets the first character to zero
2842 * */
2843 if (!card->info.mcl_level[0]) {
2844 scnprintf(card->info.mcl_level,
2845 sizeof(card->info.mcl_level),
2846 "%02x%02x",
2847 card->info.mcl_level[2],
2848 card->info.mcl_level[3]);
2849 break;
2850 }
2851 fallthrough;
2852 case QETH_CARD_TYPE_IQD:
2853 if (IS_VM_NIC(card) || (card->info.mcl_level[0] & 0x80)) {
2854 card->info.mcl_level[0] = (char) _ebcasc[(__u8)
2855 card->info.mcl_level[0]];
2856 card->info.mcl_level[1] = (char) _ebcasc[(__u8)
2857 card->info.mcl_level[1]];
2858 card->info.mcl_level[2] = (char) _ebcasc[(__u8)
2859 card->info.mcl_level[2]];
2860 card->info.mcl_level[3] = (char) _ebcasc[(__u8)
2861 card->info.mcl_level[3]];
2862 card->info.mcl_level[QETH_MCL_LENGTH] = 0;
2863 }
2864 break;
2865 default:
2866 memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1);
2867 }
2868 dev_info(&card->gdev->dev,
2869 "Device is a%s card%s%s%s\nwith link type %s.\n",
2870 qeth_get_cardname(card),
2871 (card->info.mcl_level[0]) ? " (level: " : "",
2872 (card->info.mcl_level[0]) ? card->info.mcl_level : "",
2873 (card->info.mcl_level[0]) ? ")" : "",
2874 qeth_get_cardname_short(card));
2875 }
2876
2877 static void qeth_initialize_working_pool_list(struct qeth_card *card)
2878 {
2879 struct qeth_buffer_pool_entry *entry;
2880
2881 QETH_CARD_TEXT(card, 5, "inwrklst");
2882
2883 list_for_each_entry(entry,
2884 &card->qdio.init_pool.entry_list, init_list) {
2885 qeth_put_buffer_pool_entry(card, entry);
2886 }
2887 }
2888
2889 static struct qeth_buffer_pool_entry *qeth_find_free_buffer_pool_entry(
2890 struct qeth_card *card)
2891 {
2892 struct qeth_buffer_pool_entry *entry;
2893 int i, free;
2894
2895 if (list_empty(&card->qdio.in_buf_pool.entry_list))
2896 return NULL;
2897
2898 list_for_each_entry(entry, &card->qdio.in_buf_pool.entry_list, list) {
2899 free = 1;
2900 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2901 if (page_count(entry->elements[i]) > 1) {
2902 free = 0;
2903 break;
2904 }
2905 }
2906 if (free) {
2907 list_del_init(&entry->list);
2908 return entry;
2909 }
2910 }
2911
2912 /* no free buffer in pool so take first one and swap pages */
2913 entry = list_first_entry(&card->qdio.in_buf_pool.entry_list,
2914 struct qeth_buffer_pool_entry, list);
2915 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2916 if (page_count(entry->elements[i]) > 1) {
2917 struct page *page = dev_alloc_page();
2918
2919 if (!page)
2920 return NULL;
2921
2922 __free_page(entry->elements[i]);
2923 entry->elements[i] = page;
2924 QETH_CARD_STAT_INC(card, rx_sg_alloc_page);
2925 }
2926 }
2927 list_del_init(&entry->list);
2928 return entry;
2929 }
2930
2931 static int qeth_init_input_buffer(struct qeth_card *card,
2932 struct qeth_qdio_buffer *buf)
2933 {
2934 struct qeth_buffer_pool_entry *pool_entry = buf->pool_entry;
2935 int i;
2936
2937 if ((card->options.cq == QETH_CQ_ENABLED) && (!buf->rx_skb)) {
2938 buf->rx_skb = netdev_alloc_skb(card->dev,
2939 ETH_HLEN +
2940 sizeof(struct ipv6hdr));
2941 if (!buf->rx_skb)
2942 return -ENOMEM;
2943 }
2944
2945 if (!pool_entry) {
2946 pool_entry = qeth_find_free_buffer_pool_entry(card);
2947 if (!pool_entry)
2948 return -ENOBUFS;
2949
2950 buf->pool_entry = pool_entry;
2951 }
2952
2953 /*
2954 * since the buffer is accessed only from the input_tasklet
2955 * there shouldn't be a need to synchronize; also, since we use
2956 * the QETH_IN_BUF_REQUEUE_THRESHOLD we should never run out off
2957 * buffers
2958 */
2959 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2960 buf->buffer->element[i].length = PAGE_SIZE;
2961 buf->buffer->element[i].addr = u64_to_dma64(
2962 page_to_phys(pool_entry->elements[i]));
2963 if (i == QETH_MAX_BUFFER_ELEMENTS(card) - 1)
2964 buf->buffer->element[i].eflags = SBAL_EFLAGS_LAST_ENTRY;
2965 else
2966 buf->buffer->element[i].eflags = 0;
2967 buf->buffer->element[i].sflags = 0;
2968 }
2969 return 0;
2970 }
2971
2972 static unsigned int qeth_tx_select_bulk_max(struct qeth_card *card,
2973 struct qeth_qdio_out_q *queue)
2974 {
2975 if (!IS_IQD(card) ||
2976 qeth_iqd_is_mcast_queue(card, queue) ||
2977 card->options.cq == QETH_CQ_ENABLED ||
2978 qdio_get_ssqd_desc(CARD_DDEV(card), &card->ssqd))
2979 return 1;
2980
2981 return card->ssqd.mmwc ? card->ssqd.mmwc : 1;
2982 }
2983
2984 static int qeth_init_qdio_queues(struct qeth_card *card)
2985 {
2986 unsigned int rx_bufs = card->qdio.in_buf_pool.buf_count;
2987 unsigned int i;
2988 int rc;
2989
2990 QETH_CARD_TEXT(card, 2, "initqdqs");
2991
2992 /* inbound queue */
2993 qdio_reset_buffers(card->qdio.in_q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2994 memset(&card->rx, 0, sizeof(struct qeth_rx));
2995
2996 qeth_initialize_working_pool_list(card);
2997 /*give only as many buffers to hardware as we have buffer pool entries*/
2998 for (i = 0; i < rx_bufs; i++) {
2999 rc = qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]);
3000 if (rc)
3001 return rc;
3002 }
3003
3004 card->qdio.in_q->next_buf_to_init = QDIO_BUFNR(rx_bufs);
3005 rc = qdio_add_bufs_to_input_queue(CARD_DDEV(card), 0, 0, rx_bufs);
3006 if (rc) {
3007 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
3008 return rc;
3009 }
3010
3011 /* completion */
3012 rc = qeth_cq_init(card);
3013 if (rc) {
3014 return rc;
3015 }
3016
3017 /* outbound queue */
3018 for (i = 0; i < card->qdio.no_out_queues; ++i) {
3019 struct qeth_qdio_out_q *queue = card->qdio.out_qs[i];
3020
3021 qdio_reset_buffers(queue->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
3022 queue->max_elements = QETH_MAX_BUFFER_ELEMENTS(card);
3023 queue->next_buf_to_fill = 0;
3024 queue->do_pack = 0;
3025 queue->prev_hdr = NULL;
3026 queue->coalesced_frames = 0;
3027 queue->bulk_start = 0;
3028 queue->bulk_count = 0;
3029 queue->bulk_max = qeth_tx_select_bulk_max(card, queue);
3030 atomic_set(&queue->used_buffers, 0);
3031 atomic_set(&queue->set_pci_flags_count, 0);
3032 netdev_tx_reset_queue(netdev_get_tx_queue(card->dev, i));
3033 }
3034 return 0;
3035 }
3036
3037 static void qeth_ipa_finalize_cmd(struct qeth_card *card,
3038 struct qeth_cmd_buffer *iob)
3039 {
3040 qeth_mpc_finalize_cmd(card, iob);
3041
3042 /* override with IPA-specific values: */
3043 __ipa_cmd(iob)->hdr.seqno = card->seqno.ipa++;
3044 }
3045
3046 static void qeth_prepare_ipa_cmd(struct qeth_card *card,
3047 struct qeth_cmd_buffer *iob, u16 cmd_length)
3048 {
3049 u8 prot_type = qeth_mpc_select_prot_type(card);
3050 u16 total_length = iob->length;
3051
3052 qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, total_length,
3053 iob->data);
3054 iob->finalize = qeth_ipa_finalize_cmd;
3055
3056 memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
3057 memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &total_length, 2);
3058 memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1);
3059 memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &cmd_length, 2);
3060 memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &cmd_length, 2);
3061 memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
3062 &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
3063 memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &cmd_length, 2);
3064 }
3065
3066 static bool qeth_ipa_match_reply(struct qeth_cmd_buffer *iob,
3067 struct qeth_cmd_buffer *reply)
3068 {
3069 struct qeth_ipa_cmd *ipa_reply = __ipa_reply(reply);
3070
3071 return ipa_reply && (__ipa_cmd(iob)->hdr.seqno == ipa_reply->hdr.seqno);
3072 }
3073
3074 struct qeth_cmd_buffer *qeth_ipa_alloc_cmd(struct qeth_card *card,
3075 enum qeth_ipa_cmds cmd_code,
3076 enum qeth_prot_versions prot,
3077 unsigned int data_length)
3078 {
3079 struct qeth_cmd_buffer *iob;
3080 struct qeth_ipacmd_hdr *hdr;
3081
3082 data_length += offsetof(struct qeth_ipa_cmd, data);
3083 iob = qeth_alloc_cmd(&card->write, IPA_PDU_HEADER_SIZE + data_length, 1,
3084 QETH_IPA_TIMEOUT);
3085 if (!iob)
3086 return NULL;
3087
3088 qeth_prepare_ipa_cmd(card, iob, data_length);
3089 iob->match = qeth_ipa_match_reply;
3090
3091 hdr = &__ipa_cmd(iob)->hdr;
3092 hdr->command = cmd_code;
3093 hdr->initiator = IPA_CMD_INITIATOR_HOST;
3094 /* hdr->seqno is set by qeth_send_control_data() */
3095 hdr->adapter_type = QETH_LINK_TYPE_FAST_ETH;
3096 hdr->rel_adapter_no = (u8) card->dev->dev_port;
3097 hdr->prim_version_no = IS_LAYER2(card) ? 2 : 1;
3098 hdr->param_count = 1;
3099 hdr->prot_version = prot;
3100 return iob;
3101 }
3102 EXPORT_SYMBOL_GPL(qeth_ipa_alloc_cmd);
3103
3104 static int qeth_send_ipa_cmd_cb(struct qeth_card *card,
3105 struct qeth_reply *reply, unsigned long data)
3106 {
3107 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3108
3109 return (cmd->hdr.return_code) ? -EIO : 0;
3110 }
3111
3112 /*
3113 * qeth_send_ipa_cmd() - send an IPA command
3114 *
3115 * See qeth_send_control_data() for explanation of the arguments.
3116 */
3117
3118 int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
3119 int (*reply_cb)(struct qeth_card *, struct qeth_reply*,
3120 unsigned long),
3121 void *reply_param)
3122 {
3123 int rc;
3124
3125 QETH_CARD_TEXT(card, 4, "sendipa");
3126
3127 if (card->read_or_write_problem) {
3128 qeth_put_cmd(iob);
3129 return -EIO;
3130 }
3131
3132 if (reply_cb == NULL)
3133 reply_cb = qeth_send_ipa_cmd_cb;
3134 rc = qeth_send_control_data(card, iob, reply_cb, reply_param);
3135 if (rc == -ETIME) {
3136 qeth_clear_ipacmd_list(card);
3137 qeth_schedule_recovery(card);
3138 }
3139 return rc;
3140 }
3141 EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd);
3142
3143 static int qeth_send_startlan_cb(struct qeth_card *card,
3144 struct qeth_reply *reply, unsigned long data)
3145 {
3146 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3147
3148 if (cmd->hdr.return_code == IPA_RC_LAN_OFFLINE)
3149 return -ENETDOWN;
3150
3151 return (cmd->hdr.return_code) ? -EIO : 0;
3152 }
3153
3154 static int qeth_send_startlan(struct qeth_card *card)
3155 {
3156 struct qeth_cmd_buffer *iob;
3157
3158 QETH_CARD_TEXT(card, 2, "strtlan");
3159
3160 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_STARTLAN, QETH_PROT_NONE, 0);
3161 if (!iob)
3162 return -ENOMEM;
3163 return qeth_send_ipa_cmd(card, iob, qeth_send_startlan_cb, NULL);
3164 }
3165
3166 static int qeth_setadpparms_inspect_rc(struct qeth_ipa_cmd *cmd)
3167 {
3168 if (!cmd->hdr.return_code)
3169 cmd->hdr.return_code =
3170 cmd->data.setadapterparms.hdr.return_code;
3171 return cmd->hdr.return_code;
3172 }
3173
3174 static int qeth_query_setadapterparms_cb(struct qeth_card *card,
3175 struct qeth_reply *reply, unsigned long data)
3176 {
3177 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3178 struct qeth_query_cmds_supp *query_cmd;
3179
3180 QETH_CARD_TEXT(card, 3, "quyadpcb");
3181 if (qeth_setadpparms_inspect_rc(cmd))
3182 return -EIO;
3183
3184 query_cmd = &cmd->data.setadapterparms.data.query_cmds_supp;
3185 if (query_cmd->lan_type & 0x7f) {
3186 if (!qeth_is_supported_link_type(card, query_cmd->lan_type))
3187 return -EPROTONOSUPPORT;
3188
3189 card->info.link_type = query_cmd->lan_type;
3190 QETH_CARD_TEXT_(card, 2, "lnk %d", card->info.link_type);
3191 }
3192
3193 card->options.adp.supported = query_cmd->supported_cmds;
3194 return 0;
3195 }
3196
3197 static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card,
3198 enum qeth_ipa_setadp_cmd adp_cmd,
3199 unsigned int data_length)
3200 {
3201 struct qeth_ipacmd_setadpparms_hdr *hdr;
3202 struct qeth_cmd_buffer *iob;
3203
3204 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETADAPTERPARMS, QETH_PROT_IPV4,
3205 data_length +
3206 offsetof(struct qeth_ipacmd_setadpparms,
3207 data));
3208 if (!iob)
3209 return NULL;
3210
3211 hdr = &__ipa_cmd(iob)->data.setadapterparms.hdr;
3212 hdr->cmdlength = sizeof(*hdr) + data_length;
3213 hdr->command_code = adp_cmd;
3214 hdr->used_total = 1;
3215 hdr->seq_no = 1;
3216 return iob;
3217 }
3218
3219 static int qeth_query_setadapterparms(struct qeth_card *card)
3220 {
3221 int rc;
3222 struct qeth_cmd_buffer *iob;
3223
3224 QETH_CARD_TEXT(card, 3, "queryadp");
3225 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_COMMANDS_SUPPORTED,
3226 SETADP_DATA_SIZEOF(query_cmds_supp));
3227 if (!iob)
3228 return -ENOMEM;
3229 rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL);
3230 return rc;
3231 }
3232
3233 static int qeth_query_ipassists_cb(struct qeth_card *card,
3234 struct qeth_reply *reply, unsigned long data)
3235 {
3236 struct qeth_ipa_cmd *cmd;
3237
3238 QETH_CARD_TEXT(card, 2, "qipasscb");
3239
3240 cmd = (struct qeth_ipa_cmd *) data;
3241
3242 switch (cmd->hdr.return_code) {
3243 case IPA_RC_SUCCESS:
3244 break;
3245 case IPA_RC_NOTSUPP:
3246 case IPA_RC_L2_UNSUPPORTED_CMD:
3247 QETH_CARD_TEXT(card, 2, "ipaunsup");
3248 card->options.ipa4.supported |= IPA_SETADAPTERPARMS;
3249 card->options.ipa6.supported |= IPA_SETADAPTERPARMS;
3250 return -EOPNOTSUPP;
3251 default:
3252 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Unhandled rc=%#x\n",
3253 CARD_DEVID(card), cmd->hdr.return_code);
3254 return -EIO;
3255 }
3256
3257 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
3258 card->options.ipa4 = cmd->hdr.assists;
3259 else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
3260 card->options.ipa6 = cmd->hdr.assists;
3261 else
3262 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Flawed LIC detected\n",
3263 CARD_DEVID(card));
3264 return 0;
3265 }
3266
3267 static int qeth_query_ipassists(struct qeth_card *card,
3268 enum qeth_prot_versions prot)
3269 {
3270 int rc;
3271 struct qeth_cmd_buffer *iob;
3272
3273 QETH_CARD_TEXT_(card, 2, "qipassi%i", prot);
3274 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_QIPASSIST, prot, 0);
3275 if (!iob)
3276 return -ENOMEM;
3277 rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL);
3278 return rc;
3279 }
3280
3281 static int qeth_query_switch_attributes_cb(struct qeth_card *card,
3282 struct qeth_reply *reply, unsigned long data)
3283 {
3284 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3285 struct qeth_query_switch_attributes *attrs;
3286 struct qeth_switch_info *sw_info;
3287
3288 QETH_CARD_TEXT(card, 2, "qswiatcb");
3289 if (qeth_setadpparms_inspect_rc(cmd))
3290 return -EIO;
3291
3292 sw_info = (struct qeth_switch_info *)reply->param;
3293 attrs = &cmd->data.setadapterparms.data.query_switch_attributes;
3294 sw_info->capabilities = attrs->capabilities;
3295 sw_info->settings = attrs->settings;
3296 QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities,
3297 sw_info->settings);
3298 return 0;
3299 }
3300
3301 int qeth_query_switch_attributes(struct qeth_card *card,
3302 struct qeth_switch_info *sw_info)
3303 {
3304 struct qeth_cmd_buffer *iob;
3305
3306 QETH_CARD_TEXT(card, 2, "qswiattr");
3307 if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES))
3308 return -EOPNOTSUPP;
3309 if (!netif_carrier_ok(card->dev))
3310 return -ENOMEDIUM;
3311 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES, 0);
3312 if (!iob)
3313 return -ENOMEM;
3314 return qeth_send_ipa_cmd(card, iob,
3315 qeth_query_switch_attributes_cb, sw_info);
3316 }
3317
3318 struct qeth_cmd_buffer *qeth_get_diag_cmd(struct qeth_card *card,
3319 enum qeth_diags_cmds sub_cmd,
3320 unsigned int data_length)
3321 {
3322 struct qeth_ipacmd_diagass *cmd;
3323 struct qeth_cmd_buffer *iob;
3324
3325 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SET_DIAG_ASS, QETH_PROT_NONE,
3326 DIAG_HDR_LEN + data_length);
3327 if (!iob)
3328 return NULL;
3329
3330 cmd = &__ipa_cmd(iob)->data.diagass;
3331 cmd->subcmd_len = DIAG_SUB_HDR_LEN + data_length;
3332 cmd->subcmd = sub_cmd;
3333 return iob;
3334 }
3335 EXPORT_SYMBOL_GPL(qeth_get_diag_cmd);
3336
3337 static int qeth_query_setdiagass_cb(struct qeth_card *card,
3338 struct qeth_reply *reply, unsigned long data)
3339 {
3340 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3341 u16 rc = cmd->hdr.return_code;
3342
3343 if (rc) {
3344 QETH_CARD_TEXT_(card, 2, "diagq:%x", rc);
3345 return -EIO;
3346 }
3347
3348 card->info.diagass_support = cmd->data.diagass.ext;
3349 return 0;
3350 }
3351
3352 static int qeth_query_setdiagass(struct qeth_card *card)
3353 {
3354 struct qeth_cmd_buffer *iob;
3355
3356 QETH_CARD_TEXT(card, 2, "qdiagass");
3357 iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_QUERY, 0);
3358 if (!iob)
3359 return -ENOMEM;
3360 return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL);
3361 }
3362
3363 static void qeth_get_trap_id(struct qeth_card *card, struct qeth_trap_id *tid)
3364 {
3365 unsigned long info = get_zeroed_page(GFP_KERNEL);
3366 struct sysinfo_2_2_2 *info222 = (struct sysinfo_2_2_2 *)info;
3367 struct sysinfo_3_2_2 *info322 = (struct sysinfo_3_2_2 *)info;
3368 struct ccw_dev_id ccwid;
3369 int level;
3370
3371 tid->chpid = card->info.chpid;
3372 ccw_device_get_id(CARD_RDEV(card), &ccwid);
3373 tid->ssid = ccwid.ssid;
3374 tid->devno = ccwid.devno;
3375 if (!info)
3376 return;
3377 level = stsi(NULL, 0, 0, 0);
3378 if ((level >= 2) && (stsi(info222, 2, 2, 2) == 0))
3379 tid->lparnr = info222->lpar_number;
3380 if ((level >= 3) && (stsi(info322, 3, 2, 2) == 0)) {
3381 EBCASC(info322->vm[0].name, sizeof(info322->vm[0].name));
3382 memcpy(tid->vmname, info322->vm[0].name, sizeof(tid->vmname));
3383 }
3384 free_page(info);
3385 }
3386
3387 static int qeth_hw_trap_cb(struct qeth_card *card,
3388 struct qeth_reply *reply, unsigned long data)
3389 {
3390 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3391 u16 rc = cmd->hdr.return_code;
3392
3393 if (rc) {
3394 QETH_CARD_TEXT_(card, 2, "trapc:%x", rc);
3395 return -EIO;
3396 }
3397 return 0;
3398 }
3399
3400 int qeth_hw_trap(struct qeth_card *card, enum qeth_diags_trap_action action)
3401 {
3402 struct qeth_cmd_buffer *iob;
3403 struct qeth_ipa_cmd *cmd;
3404
3405 QETH_CARD_TEXT(card, 2, "diagtrap");
3406 iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_TRAP, 64);
3407 if (!iob)
3408 return -ENOMEM;
3409 cmd = __ipa_cmd(iob);
3410 cmd->data.diagass.type = 1;
3411 cmd->data.diagass.action = action;
3412 switch (action) {
3413 case QETH_DIAGS_TRAP_ARM:
3414 cmd->data.diagass.options = 0x0003;
3415 cmd->data.diagass.ext = 0x00010000 +
3416 sizeof(struct qeth_trap_id);
3417 qeth_get_trap_id(card,
3418 (struct qeth_trap_id *)cmd->data.diagass.cdata);
3419 break;
3420 case QETH_DIAGS_TRAP_DISARM:
3421 cmd->data.diagass.options = 0x0001;
3422 break;
3423 case QETH_DIAGS_TRAP_CAPTURE:
3424 break;
3425 }
3426 return qeth_send_ipa_cmd(card, iob, qeth_hw_trap_cb, NULL);
3427 }
3428
3429 static int qeth_check_qdio_errors(struct qeth_card *card,
3430 struct qdio_buffer *buf,
3431 unsigned int qdio_error,
3432 const char *dbftext)
3433 {
3434 if (qdio_error) {
3435 QETH_CARD_TEXT(card, 2, dbftext);
3436 QETH_CARD_TEXT_(card, 2, " F15=%02X",
3437 buf->element[15].sflags);
3438 QETH_CARD_TEXT_(card, 2, " F14=%02X",
3439 buf->element[14].sflags);
3440 QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error);
3441 if ((buf->element[15].sflags) == 0x12) {
3442 QETH_CARD_STAT_INC(card, rx_fifo_errors);
3443 return 0;
3444 } else
3445 return 1;
3446 }
3447 return 0;
3448 }
3449
3450 static unsigned int qeth_rx_refill_queue(struct qeth_card *card,
3451 unsigned int count)
3452 {
3453 struct qeth_qdio_q *queue = card->qdio.in_q;
3454 struct list_head *lh;
3455 int i;
3456 int rc;
3457 int newcount = 0;
3458
3459 /* only requeue at a certain threshold to avoid SIGAs */
3460 if (count >= QETH_IN_BUF_REQUEUE_THRESHOLD(card)) {
3461 for (i = queue->next_buf_to_init;
3462 i < queue->next_buf_to_init + count; ++i) {
3463 if (qeth_init_input_buffer(card,
3464 &queue->bufs[QDIO_BUFNR(i)])) {
3465 break;
3466 } else {
3467 newcount++;
3468 }
3469 }
3470
3471 if (newcount < count) {
3472 /* we are in memory shortage so we switch back to
3473 traditional skb allocation and drop packages */
3474 atomic_set(&card->force_alloc_skb, 3);
3475 count = newcount;
3476 } else {
3477 atomic_add_unless(&card->force_alloc_skb, -1, 0);
3478 }
3479
3480 if (!count) {
3481 i = 0;
3482 list_for_each(lh, &card->qdio.in_buf_pool.entry_list)
3483 i++;
3484 if (i == card->qdio.in_buf_pool.buf_count) {
3485 QETH_CARD_TEXT(card, 2, "qsarbw");
3486 schedule_delayed_work(
3487 &card->buffer_reclaim_work,
3488 QETH_RECLAIM_WORK_TIME);
3489 }
3490 return 0;
3491 }
3492
3493 rc = qdio_add_bufs_to_input_queue(CARD_DDEV(card), 0,
3494 queue->next_buf_to_init,
3495 count);
3496 if (rc) {
3497 QETH_CARD_TEXT(card, 2, "qinberr");
3498 }
3499 queue->next_buf_to_init = QDIO_BUFNR(queue->next_buf_to_init +
3500 count);
3501 return count;
3502 }
3503
3504 return 0;
3505 }
3506
3507 static void qeth_buffer_reclaim_work(struct work_struct *work)
3508 {
3509 struct qeth_card *card = container_of(to_delayed_work(work),
3510 struct qeth_card,
3511 buffer_reclaim_work);
3512
3513 local_bh_disable();
3514 napi_schedule(&card->napi);
3515 /* kick-start the NAPI softirq: */
3516 local_bh_enable();
3517 }
3518
3519 static void qeth_handle_send_error(struct qeth_card *card,
3520 struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err)
3521 {
3522 int sbalf15 = buffer->buffer->element[15].sflags;
3523
3524 QETH_CARD_TEXT(card, 6, "hdsnderr");
3525 qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr");
3526
3527 if (!qdio_err)
3528 return;
3529
3530 if ((sbalf15 >= 15) && (sbalf15 <= 31))
3531 return;
3532
3533 QETH_CARD_TEXT(card, 1, "lnkfail");
3534 QETH_CARD_TEXT_(card, 1, "%04x %02x",
3535 (u16)qdio_err, (u8)sbalf15);
3536 }
3537
3538 /**
3539 * qeth_prep_flush_pack_buffer - Prepares flushing of a packing buffer.
3540 * @queue: queue to check for packing buffer
3541 *
3542 * Returns number of buffers that were prepared for flush.
3543 */
3544 static int qeth_prep_flush_pack_buffer(struct qeth_qdio_out_q *queue)
3545 {
3546 struct qeth_qdio_out_buffer *buffer;
3547
3548 buffer = queue->bufs[queue->next_buf_to_fill];
3549 if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) &&
3550 (buffer->next_element_to_fill > 0)) {
3551 /* it's a packing buffer */
3552 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3553 queue->next_buf_to_fill =
3554 QDIO_BUFNR(queue->next_buf_to_fill + 1);
3555 return 1;
3556 }
3557 return 0;
3558 }
3559
3560 /*
3561 * Switched to packing state if the number of used buffers on a queue
3562 * reaches a certain limit.
3563 */
3564 static void qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q *queue)
3565 {
3566 if (!queue->do_pack) {
3567 if (atomic_read(&queue->used_buffers)
3568 >= QETH_HIGH_WATERMARK_PACK){
3569 /* switch non-PACKING -> PACKING */
3570 QETH_CARD_TEXT(queue->card, 6, "np->pack");
3571 QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3572 queue->do_pack = 1;
3573 }
3574 }
3575 }
3576
3577 /*
3578 * Switches from packing to non-packing mode. If there is a packing
3579 * buffer on the queue this buffer will be prepared to be flushed.
3580 * In that case 1 is returned to inform the caller. If no buffer
3581 * has to be flushed, zero is returned.
3582 */
3583 static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue)
3584 {
3585 if (queue->do_pack) {
3586 if (atomic_read(&queue->used_buffers)
3587 <= QETH_LOW_WATERMARK_PACK) {
3588 /* switch PACKING -> non-PACKING */
3589 QETH_CARD_TEXT(queue->card, 6, "pack->np");
3590 QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3591 queue->do_pack = 0;
3592 return qeth_prep_flush_pack_buffer(queue);
3593 }
3594 }
3595 return 0;
3596 }
3597
3598 static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
3599 int count)
3600 {
3601 struct qeth_qdio_out_buffer *buf = queue->bufs[index];
3602 struct qeth_card *card = queue->card;
3603 unsigned int frames, usecs;
3604 struct qaob *aob = NULL;
3605 int rc;
3606 int i;
3607
3608 for (i = index; i < index + count; ++i) {
3609 unsigned int bidx = QDIO_BUFNR(i);
3610 struct sk_buff *skb;
3611
3612 buf = queue->bufs[bidx];
3613 buf->buffer->element[buf->next_element_to_fill - 1].eflags |=
3614 SBAL_EFLAGS_LAST_ENTRY;
3615 queue->coalesced_frames += buf->frames;
3616
3617 if (IS_IQD(card)) {
3618 skb_queue_walk(&buf->skb_list, skb)
3619 skb_tx_timestamp(skb);
3620 }
3621 }
3622
3623 if (IS_IQD(card)) {
3624 if (card->options.cq == QETH_CQ_ENABLED &&
3625 !qeth_iqd_is_mcast_queue(card, queue) &&
3626 count == 1) {
3627 if (!buf->aob)
3628 buf->aob = kmem_cache_zalloc(qeth_qaob_cache,
3629 GFP_ATOMIC);
3630 if (buf->aob) {
3631 struct qeth_qaob_priv1 *priv;
3632
3633 aob = buf->aob;
3634 priv = (struct qeth_qaob_priv1 *)&aob->user1;
3635 priv->state = QETH_QAOB_ISSUED;
3636 priv->queue_no = queue->queue_no;
3637 }
3638 }
3639 } else {
3640 if (!queue->do_pack) {
3641 if ((atomic_read(&queue->used_buffers) >=
3642 (QETH_HIGH_WATERMARK_PACK -
3643 QETH_WATERMARK_PACK_FUZZ)) &&
3644 !atomic_read(&queue->set_pci_flags_count)) {
3645 /* it's likely that we'll go to packing
3646 * mode soon */
3647 atomic_inc(&queue->set_pci_flags_count);
3648 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3649 }
3650 } else {
3651 if (!atomic_read(&queue->set_pci_flags_count)) {
3652 /*
3653 * there's no outstanding PCI any more, so we
3654 * have to request a PCI to be sure the PCI
3655 * will wake at some time in the future then we
3656 * can flush packed buffers that might still be
3657 * hanging around, which can happen if no
3658 * further send was requested by the stack
3659 */
3660 atomic_inc(&queue->set_pci_flags_count);
3661 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3662 }
3663 }
3664 }
3665
3666 QETH_TXQ_STAT_INC(queue, doorbell);
3667 rc = qdio_add_bufs_to_output_queue(CARD_DDEV(card), queue->queue_no,
3668 index, count, aob);
3669
3670 switch (rc) {
3671 case 0:
3672 case -ENOBUFS:
3673 /* ignore temporary SIGA errors without busy condition */
3674
3675 /* Fake the TX completion interrupt: */
3676 frames = READ_ONCE(queue->max_coalesced_frames);
3677 usecs = READ_ONCE(queue->coalesce_usecs);
3678
3679 if (frames && queue->coalesced_frames >= frames) {
3680 napi_schedule(&queue->napi);
3681 queue->coalesced_frames = 0;
3682 QETH_TXQ_STAT_INC(queue, coal_frames);
3683 } else if (qeth_use_tx_irqs(card) &&
3684 atomic_read(&queue->used_buffers) >= 32) {
3685 /* Old behaviour carried over from the qdio layer: */
3686 napi_schedule(&queue->napi);
3687 QETH_TXQ_STAT_INC(queue, coal_frames);
3688 } else if (usecs) {
3689 qeth_tx_arm_timer(queue, usecs);
3690 }
3691
3692 break;
3693 default:
3694 QETH_CARD_TEXT(queue->card, 2, "flushbuf");
3695 QETH_CARD_TEXT_(queue->card, 2, " q%d", queue->queue_no);
3696 QETH_CARD_TEXT_(queue->card, 2, " idx%d", index);
3697 QETH_CARD_TEXT_(queue->card, 2, " c%d", count);
3698 QETH_CARD_TEXT_(queue->card, 2, " err%d", rc);
3699
3700 /* this must not happen under normal circumstances. if it
3701 * happens something is really wrong -> recover */
3702 qeth_schedule_recovery(queue->card);
3703 }
3704 }
3705
3706 static void qeth_flush_queue(struct qeth_qdio_out_q *queue)
3707 {
3708 qeth_flush_buffers(queue, queue->bulk_start, queue->bulk_count);
3709
3710 queue->bulk_start = QDIO_BUFNR(queue->bulk_start + queue->bulk_count);
3711 queue->prev_hdr = NULL;
3712 queue->bulk_count = 0;
3713 }
3714
3715 static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue)
3716 {
3717 /*
3718 * check if we have to switch to non-packing mode or if
3719 * we have to get a pci flag out on the queue
3720 */
3721 if ((atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) ||
3722 !atomic_read(&queue->set_pci_flags_count)) {
3723 unsigned int index, flush_cnt;
3724
3725 spin_lock(&queue->lock);
3726
3727 index = queue->next_buf_to_fill;
3728
3729 flush_cnt = qeth_switch_to_nonpacking_if_needed(queue);
3730 if (!flush_cnt && !atomic_read(&queue->set_pci_flags_count))
3731 flush_cnt = qeth_prep_flush_pack_buffer(queue);
3732
3733 if (flush_cnt) {
3734 qeth_flush_buffers(queue, index, flush_cnt);
3735 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_cnt);
3736 }
3737
3738 spin_unlock(&queue->lock);
3739 }
3740 }
3741
3742 static void qeth_qdio_poll(struct ccw_device *cdev, unsigned long card_ptr)
3743 {
3744 struct qeth_card *card = (struct qeth_card *)card_ptr;
3745
3746 napi_schedule_irqoff(&card->napi);
3747 }
3748
3749 int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq)
3750 {
3751 if (card->options.cq == QETH_CQ_NOTAVAILABLE)
3752 return -1;
3753
3754 card->options.cq = cq;
3755 return 0;
3756 }
3757 EXPORT_SYMBOL_GPL(qeth_configure_cq);
3758
3759 static void qeth_qdio_handle_aob(struct qeth_card *card, struct qaob *aob)
3760 {
3761 struct qeth_qaob_priv1 *priv = (struct qeth_qaob_priv1 *)&aob->user1;
3762 unsigned int queue_no = priv->queue_no;
3763
3764 BUILD_BUG_ON(sizeof(*priv) > ARRAY_SIZE(aob->user1));
3765
3766 if (xchg(&priv->state, QETH_QAOB_DONE) == QETH_QAOB_PENDING &&
3767 queue_no < card->qdio.no_out_queues)
3768 napi_schedule(&card->qdio.out_qs[queue_no]->napi);
3769 }
3770
3771 static void qeth_qdio_cq_handler(struct qeth_card *card, unsigned int qdio_err,
3772 unsigned int queue, int first_element,
3773 int count)
3774 {
3775 struct qeth_qdio_q *cq = card->qdio.c_q;
3776 int i;
3777 int rc;
3778
3779 QETH_CARD_TEXT_(card, 5, "qcqhe%d", first_element);
3780 QETH_CARD_TEXT_(card, 5, "qcqhc%d", count);
3781 QETH_CARD_TEXT_(card, 5, "qcqherr%d", qdio_err);
3782
3783 if (qdio_err) {
3784 netif_tx_stop_all_queues(card->dev);
3785 qeth_schedule_recovery(card);
3786 return;
3787 }
3788
3789 for (i = first_element; i < first_element + count; ++i) {
3790 struct qdio_buffer *buffer = cq->qdio_bufs[QDIO_BUFNR(i)];
3791 int e = 0;
3792
3793 while ((e < QDIO_MAX_ELEMENTS_PER_BUFFER) &&
3794 buffer->element[e].addr) {
3795 dma64_t phys_aob_addr = buffer->element[e].addr;
3796
3797 qeth_qdio_handle_aob(card, dma64_to_virt(phys_aob_addr));
3798 ++e;
3799 }
3800 qeth_scrub_qdio_buffer(buffer, QDIO_MAX_ELEMENTS_PER_BUFFER);
3801 }
3802 rc = qdio_add_bufs_to_input_queue(CARD_DDEV(card), queue,
3803 cq->next_buf_to_init, count);
3804 if (rc) {
3805 dev_warn(&card->gdev->dev,
3806 "QDIO reported an error, rc=%i\n", rc);
3807 QETH_CARD_TEXT(card, 2, "qcqherr");
3808 }
3809
3810 cq->next_buf_to_init = QDIO_BUFNR(cq->next_buf_to_init + count);
3811 }
3812
3813 static void qeth_qdio_input_handler(struct ccw_device *ccwdev,
3814 unsigned int qdio_err, int queue,
3815 int first_elem, int count,
3816 unsigned long card_ptr)
3817 {
3818 struct qeth_card *card = (struct qeth_card *)card_ptr;
3819
3820 QETH_CARD_TEXT_(card, 2, "qihq%d", queue);
3821 QETH_CARD_TEXT_(card, 2, "qiec%d", qdio_err);
3822
3823 if (qdio_err)
3824 qeth_schedule_recovery(card);
3825 }
3826
3827 static void qeth_qdio_output_handler(struct ccw_device *ccwdev,
3828 unsigned int qdio_error, int __queue,
3829 int first_element, int count,
3830 unsigned long card_ptr)
3831 {
3832 struct qeth_card *card = (struct qeth_card *) card_ptr;
3833
3834 QETH_CARD_TEXT(card, 2, "achkcond");
3835 netif_tx_stop_all_queues(card->dev);
3836 qeth_schedule_recovery(card);
3837 }
3838
3839 /*
3840 * Note: Function assumes that we have 4 outbound queues.
3841 */
3842 static int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb)
3843 {
3844 struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
3845 u8 tos;
3846
3847 switch (card->qdio.do_prio_queueing) {
3848 case QETH_PRIO_Q_ING_TOS:
3849 case QETH_PRIO_Q_ING_PREC:
3850 switch (vlan_get_protocol(skb)) {
3851 case htons(ETH_P_IP):
3852 tos = ipv4_get_dsfield(ip_hdr(skb));
3853 break;
3854 case htons(ETH_P_IPV6):
3855 tos = ipv6_get_dsfield(ipv6_hdr(skb));
3856 break;
3857 default:
3858 return card->qdio.default_out_queue;
3859 }
3860 if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC)
3861 return ~tos >> 6 & 3;
3862 if (tos & IPTOS_MINCOST)
3863 return 3;
3864 if (tos & IPTOS_RELIABILITY)
3865 return 2;
3866 if (tos & IPTOS_THROUGHPUT)
3867 return 1;
3868 if (tos & IPTOS_LOWDELAY)
3869 return 0;
3870 break;
3871 case QETH_PRIO_Q_ING_SKB:
3872 if (skb->priority > 5)
3873 return 0;
3874 return ~skb->priority >> 1 & 3;
3875 case QETH_PRIO_Q_ING_VLAN:
3876 if (veth->h_vlan_proto == htons(ETH_P_8021Q))
3877 return ~ntohs(veth->h_vlan_TCI) >>
3878 (VLAN_PRIO_SHIFT + 1) & 3;
3879 break;
3880 case QETH_PRIO_Q_ING_FIXED:
3881 return card->qdio.default_out_queue;
3882 default:
3883 break;
3884 }
3885 return card->qdio.default_out_queue;
3886 }
3887
3888 /**
3889 * qeth_get_elements_for_frags() - find number of SBALEs for skb frags.
3890 * @skb: SKB address
3891 *
3892 * Returns the number of pages, and thus QDIO buffer elements, needed to cover
3893 * fragmented part of the SKB. Returns zero for linear SKB.
3894 */
3895 static int qeth_get_elements_for_frags(struct sk_buff *skb)
3896 {
3897 int cnt, elements = 0;
3898
3899 for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3900 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
3901
3902 elements += qeth_get_elements_for_range(
3903 (addr_t)skb_frag_address(frag),
3904 (addr_t)skb_frag_address(frag) + skb_frag_size(frag));
3905 }
3906 return elements;
3907 }
3908
3909 /**
3910 * qeth_count_elements() - Counts the number of QDIO buffer elements needed
3911 * to transmit an skb.
3912 * @skb: the skb to operate on.
3913 * @data_offset: skip this part of the skb's linear data
3914 *
3915 * Returns the number of pages, and thus QDIO buffer elements, needed to map the
3916 * skb's data (both its linear part and paged fragments).
3917 */
3918 static unsigned int qeth_count_elements(struct sk_buff *skb,
3919 unsigned int data_offset)
3920 {
3921 unsigned int elements = qeth_get_elements_for_frags(skb);
3922 addr_t end = (addr_t)skb->data + skb_headlen(skb);
3923 addr_t start = (addr_t)skb->data + data_offset;
3924
3925 if (start != end)
3926 elements += qeth_get_elements_for_range(start, end);
3927 return elements;
3928 }
3929
3930 #define QETH_HDR_CACHE_OBJ_SIZE (sizeof(struct qeth_hdr_tso) + \
3931 MAX_TCP_HEADER)
3932
3933 /**
3934 * qeth_add_hw_header() - add a HW header to an skb.
3935 * @queue: TX queue that the skb will be placed on.
3936 * @skb: skb that the HW header should be added to.
3937 * @hdr: double pointer to a qeth_hdr. When returning with >= 0,
3938 * it contains a valid pointer to a qeth_hdr.
3939 * @hdr_len: length of the HW header.
3940 * @proto_len: length of protocol headers that need to be in same page as the
3941 * HW header.
3942 * @elements: returns the required number of buffer elements for this skb.
3943 *
3944 * Returns the pushed length. If the header can't be pushed on
3945 * (eg. because it would cross a page boundary), it is allocated from
3946 * the cache instead and 0 is returned.
3947 * The number of needed buffer elements is returned in @elements.
3948 * Error to create the hdr is indicated by returning with < 0.
3949 */
3950 static int qeth_add_hw_header(struct qeth_qdio_out_q *queue,
3951 struct sk_buff *skb, struct qeth_hdr **hdr,
3952 unsigned int hdr_len, unsigned int proto_len,
3953 unsigned int *elements)
3954 {
3955 gfp_t gfp = GFP_ATOMIC | (skb_pfmemalloc(skb) ? __GFP_MEMALLOC : 0);
3956 const unsigned int contiguous = proto_len ? proto_len : 1;
3957 const unsigned int max_elements = queue->max_elements;
3958 unsigned int __elements;
3959 addr_t start, end;
3960 bool push_ok;
3961 int rc;
3962
3963 check_layout:
3964 start = (addr_t)skb->data - hdr_len;
3965 end = (addr_t)skb->data;
3966
3967 if (qeth_get_elements_for_range(start, end + contiguous) == 1) {
3968 /* Push HW header into same page as first protocol header. */
3969 push_ok = true;
3970 /* ... but TSO always needs a separate element for headers: */
3971 if (skb_is_gso(skb))
3972 __elements = 1 + qeth_count_elements(skb, proto_len);
3973 else
3974 __elements = qeth_count_elements(skb, 0);
3975 } else if (!proto_len && PAGE_ALIGNED(skb->data)) {
3976 /* Push HW header into preceding page, flush with skb->data. */
3977 push_ok = true;
3978 __elements = 1 + qeth_count_elements(skb, 0);
3979 } else {
3980 /* Use header cache, copy protocol headers up. */
3981 push_ok = false;
3982 __elements = 1 + qeth_count_elements(skb, proto_len);
3983 }
3984
3985 /* Compress skb to fit into one IO buffer: */
3986 if (__elements > max_elements) {
3987 if (!skb_is_nonlinear(skb)) {
3988 /* Drop it, no easy way of shrinking it further. */
3989 QETH_DBF_MESSAGE(2, "Dropped an oversized skb (Max Elements=%u / Actual=%u / Length=%u).\n",
3990 max_elements, __elements, skb->len);
3991 return -E2BIG;
3992 }
3993
3994 rc = skb_linearize(skb);
3995 if (rc) {
3996 QETH_TXQ_STAT_INC(queue, skbs_linearized_fail);
3997 return rc;
3998 }
3999
4000 QETH_TXQ_STAT_INC(queue, skbs_linearized);
4001 /* Linearization changed the layout, re-evaluate: */
4002 goto check_layout;
4003 }
4004
4005 *elements = __elements;
4006 /* Add the header: */
4007 if (push_ok) {
4008 *hdr = skb_push(skb, hdr_len);
4009 return hdr_len;
4010 }
4011
4012 /* Fall back to cache element with known-good alignment: */
4013 if (hdr_len + proto_len > QETH_HDR_CACHE_OBJ_SIZE)
4014 return -E2BIG;
4015 *hdr = kmem_cache_alloc(qeth_core_header_cache, gfp);
4016 if (!*hdr)
4017 return -ENOMEM;
4018 /* Copy protocol headers behind HW header: */
4019 skb_copy_from_linear_data(skb, ((char *)*hdr) + hdr_len, proto_len);
4020 return 0;
4021 }
4022
4023 static bool qeth_iqd_may_bulk(struct qeth_qdio_out_q *queue,
4024 struct sk_buff *curr_skb,
4025 struct qeth_hdr *curr_hdr)
4026 {
4027 struct qeth_qdio_out_buffer *buffer = queue->bufs[queue->bulk_start];
4028 struct qeth_hdr *prev_hdr = queue->prev_hdr;
4029
4030 if (!prev_hdr)
4031 return true;
4032
4033 /* All packets must have the same target: */
4034 if (curr_hdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER2) {
4035 struct sk_buff *prev_skb = skb_peek(&buffer->skb_list);
4036
4037 return ether_addr_equal(eth_hdr(prev_skb)->h_dest,
4038 eth_hdr(curr_skb)->h_dest) &&
4039 qeth_l2_same_vlan(&prev_hdr->hdr.l2, &curr_hdr->hdr.l2);
4040 }
4041
4042 return qeth_l3_same_next_hop(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3) &&
4043 qeth_l3_iqd_same_vlan(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3);
4044 }
4045
4046 /**
4047 * qeth_fill_buffer() - map skb into an output buffer
4048 * @buf: buffer to transport the skb
4049 * @skb: skb to map into the buffer
4050 * @hdr: qeth_hdr for this skb. Either at skb->data, or allocated
4051 * from qeth_core_header_cache.
4052 * @offset: when mapping the skb, start at skb->data + offset
4053 * @hd_len: if > 0, build a dedicated header element of this size
4054 */
4055 static unsigned int qeth_fill_buffer(struct qeth_qdio_out_buffer *buf,
4056 struct sk_buff *skb, struct qeth_hdr *hdr,
4057 unsigned int offset, unsigned int hd_len)
4058 {
4059 struct qdio_buffer *buffer = buf->buffer;
4060 int element = buf->next_element_to_fill;
4061 int length = skb_headlen(skb) - offset;
4062 char *data = skb->data + offset;
4063 unsigned int elem_length, cnt;
4064 bool is_first_elem = true;
4065
4066 __skb_queue_tail(&buf->skb_list, skb);
4067
4068 /* build dedicated element for HW Header */
4069 if (hd_len) {
4070 is_first_elem = false;
4071
4072 buffer->element[element].addr = virt_to_dma64(hdr);
4073 buffer->element[element].length = hd_len;
4074 buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
4075
4076 /* HW header is allocated from cache: */
4077 if ((void *)hdr != skb->data)
4078 __set_bit(element, buf->from_kmem_cache);
4079 /* HW header was pushed and is contiguous with linear part: */
4080 else if (length > 0 && !PAGE_ALIGNED(data) &&
4081 (data == (char *)hdr + hd_len))
4082 buffer->element[element].eflags |=
4083 SBAL_EFLAGS_CONTIGUOUS;
4084
4085 element++;
4086 }
4087
4088 /* map linear part into buffer element(s) */
4089 while (length > 0) {
4090 elem_length = min_t(unsigned int, length,
4091 PAGE_SIZE - offset_in_page(data));
4092
4093 buffer->element[element].addr = virt_to_dma64(data);
4094 buffer->element[element].length = elem_length;
4095 length -= elem_length;
4096 if (is_first_elem) {
4097 is_first_elem = false;
4098 if (length || skb_is_nonlinear(skb))
4099 /* skb needs additional elements */
4100 buffer->element[element].eflags =
4101 SBAL_EFLAGS_FIRST_FRAG;
4102 else
4103 buffer->element[element].eflags = 0;
4104 } else {
4105 buffer->element[element].eflags =
4106 SBAL_EFLAGS_MIDDLE_FRAG;
4107 }
4108
4109 data += elem_length;
4110 element++;
4111 }
4112
4113 /* map page frags into buffer element(s) */
4114 for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
4115 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
4116
4117 data = skb_frag_address(frag);
4118 length = skb_frag_size(frag);
4119 while (length > 0) {
4120 elem_length = min_t(unsigned int, length,
4121 PAGE_SIZE - offset_in_page(data));
4122
4123 buffer->element[element].addr = virt_to_dma64(data);
4124 buffer->element[element].length = elem_length;
4125 buffer->element[element].eflags =
4126 SBAL_EFLAGS_MIDDLE_FRAG;
4127
4128 length -= elem_length;
4129 data += elem_length;
4130 element++;
4131 }
4132 }
4133
4134 if (buffer->element[element - 1].eflags)
4135 buffer->element[element - 1].eflags = SBAL_EFLAGS_LAST_FRAG;
4136 buf->next_element_to_fill = element;
4137 return element;
4138 }
4139
4140 static int __qeth_xmit(struct qeth_card *card, struct qeth_qdio_out_q *queue,
4141 struct sk_buff *skb, unsigned int elements,
4142 struct qeth_hdr *hdr, unsigned int offset,
4143 unsigned int hd_len)
4144 {
4145 unsigned int bytes = qdisc_pkt_len(skb);
4146 struct qeth_qdio_out_buffer *buffer;
4147 unsigned int next_element;
4148 struct netdev_queue *txq;
4149 bool stopped = false;
4150 bool flush;
4151
4152 buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start + queue->bulk_count)];
4153 txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
4154
4155 /* Just a sanity check, the wake/stop logic should ensure that we always
4156 * get a free buffer.
4157 */
4158 if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4159 return -EBUSY;
4160
4161 flush = !qeth_iqd_may_bulk(queue, skb, hdr);
4162
4163 if (flush ||
4164 (buffer->next_element_to_fill + elements > queue->max_elements)) {
4165 if (buffer->next_element_to_fill > 0) {
4166 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4167 queue->bulk_count++;
4168 }
4169
4170 if (queue->bulk_count >= queue->bulk_max)
4171 flush = true;
4172
4173 if (flush)
4174 qeth_flush_queue(queue);
4175
4176 buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start +
4177 queue->bulk_count)];
4178
4179 /* Sanity-check again: */
4180 if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4181 return -EBUSY;
4182 }
4183
4184 if (buffer->next_element_to_fill == 0 &&
4185 atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
4186 /* If a TX completion happens right _here_ and misses to wake
4187 * the txq, then our re-check below will catch the race.
4188 */
4189 QETH_TXQ_STAT_INC(queue, stopped);
4190 netif_tx_stop_queue(txq);
4191 stopped = true;
4192 }
4193
4194 next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
4195 buffer->bytes += bytes;
4196 buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
4197 queue->prev_hdr = hdr;
4198
4199 flush = __netdev_tx_sent_queue(txq, bytes,
4200 !stopped && netdev_xmit_more());
4201
4202 if (flush || next_element >= queue->max_elements) {
4203 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4204 queue->bulk_count++;
4205
4206 if (queue->bulk_count >= queue->bulk_max)
4207 flush = true;
4208
4209 if (flush)
4210 qeth_flush_queue(queue);
4211 }
4212
4213 if (stopped && !qeth_out_queue_is_full(queue))
4214 netif_tx_start_queue(txq);
4215 return 0;
4216 }
4217
4218 static int qeth_do_send_packet(struct qeth_card *card,
4219 struct qeth_qdio_out_q *queue,
4220 struct sk_buff *skb, struct qeth_hdr *hdr,
4221 unsigned int offset, unsigned int hd_len,
4222 unsigned int elements_needed)
4223 {
4224 unsigned int start_index = queue->next_buf_to_fill;
4225 struct qeth_qdio_out_buffer *buffer;
4226 unsigned int next_element;
4227 struct netdev_queue *txq;
4228 bool stopped = false;
4229 int flush_count = 0;
4230 int do_pack = 0;
4231 int rc = 0;
4232
4233 buffer = queue->bufs[queue->next_buf_to_fill];
4234
4235 /* Just a sanity check, the wake/stop logic should ensure that we always
4236 * get a free buffer.
4237 */
4238 if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4239 return -EBUSY;
4240
4241 txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
4242
4243 /* check if we need to switch packing state of this queue */
4244 qeth_switch_to_packing_if_needed(queue);
4245 if (queue->do_pack) {
4246 do_pack = 1;
4247 /* does packet fit in current buffer? */
4248 if (buffer->next_element_to_fill + elements_needed >
4249 queue->max_elements) {
4250 /* ... no -> set state PRIMED */
4251 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4252 flush_count++;
4253 queue->next_buf_to_fill =
4254 QDIO_BUFNR(queue->next_buf_to_fill + 1);
4255 buffer = queue->bufs[queue->next_buf_to_fill];
4256
4257 /* We stepped forward, so sanity-check again: */
4258 if (atomic_read(&buffer->state) !=
4259 QETH_QDIO_BUF_EMPTY) {
4260 qeth_flush_buffers(queue, start_index,
4261 flush_count);
4262 rc = -EBUSY;
4263 goto out;
4264 }
4265 }
4266 }
4267
4268 if (buffer->next_element_to_fill == 0 &&
4269 atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
4270 /* If a TX completion happens right _here_ and misses to wake
4271 * the txq, then our re-check below will catch the race.
4272 */
4273 QETH_TXQ_STAT_INC(queue, stopped);
4274 netif_tx_stop_queue(txq);
4275 stopped = true;
4276 }
4277
4278 next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
4279 buffer->bytes += qdisc_pkt_len(skb);
4280 buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
4281
4282 if (queue->do_pack)
4283 QETH_TXQ_STAT_INC(queue, skbs_pack);
4284 if (!queue->do_pack || stopped || next_element >= queue->max_elements) {
4285 flush_count++;
4286 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4287 queue->next_buf_to_fill =
4288 QDIO_BUFNR(queue->next_buf_to_fill + 1);
4289 }
4290
4291 if (flush_count)
4292 qeth_flush_buffers(queue, start_index, flush_count);
4293
4294 out:
4295 if (do_pack)
4296 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_count);
4297
4298 if (stopped && !qeth_out_queue_is_full(queue))
4299 netif_tx_start_queue(txq);
4300 return rc;
4301 }
4302
4303 static void qeth_fill_tso_ext(struct qeth_hdr_tso *hdr,
4304 unsigned int payload_len, struct sk_buff *skb,
4305 unsigned int proto_len)
4306 {
4307 struct qeth_hdr_ext_tso *ext = &hdr->ext;
4308
4309 ext->hdr_tot_len = sizeof(*ext);
4310 ext->imb_hdr_no = 1;
4311 ext->hdr_type = 1;
4312 ext->hdr_version = 1;
4313 ext->hdr_len = 28;
4314 ext->payload_len = payload_len;
4315 ext->mss = skb_shinfo(skb)->gso_size;
4316 ext->dg_hdr_len = proto_len;
4317 }
4318
4319 int qeth_xmit(struct qeth_card *card, struct sk_buff *skb,
4320 struct qeth_qdio_out_q *queue, __be16 proto,
4321 void (*fill_header)(struct qeth_qdio_out_q *queue,
4322 struct qeth_hdr *hdr, struct sk_buff *skb,
4323 __be16 proto, unsigned int data_len))
4324 {
4325 unsigned int proto_len, hw_hdr_len;
4326 unsigned int frame_len = skb->len;
4327 bool is_tso = skb_is_gso(skb);
4328 unsigned int data_offset = 0;
4329 struct qeth_hdr *hdr = NULL;
4330 unsigned int hd_len = 0;
4331 unsigned int elements;
4332 int push_len, rc;
4333
4334 if (is_tso) {
4335 hw_hdr_len = sizeof(struct qeth_hdr_tso);
4336 proto_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
4337 } else {
4338 hw_hdr_len = sizeof(struct qeth_hdr);
4339 proto_len = (IS_IQD(card) && IS_LAYER2(card)) ? ETH_HLEN : 0;
4340 }
4341
4342 rc = skb_cow_head(skb, hw_hdr_len);
4343 if (rc)
4344 return rc;
4345
4346 push_len = qeth_add_hw_header(queue, skb, &hdr, hw_hdr_len, proto_len,
4347 &elements);
4348 if (push_len < 0)
4349 return push_len;
4350 if (is_tso || !push_len) {
4351 /* HW header needs its own buffer element. */
4352 hd_len = hw_hdr_len + proto_len;
4353 data_offset = push_len + proto_len;
4354 }
4355 memset(hdr, 0, hw_hdr_len);
4356 fill_header(queue, hdr, skb, proto, frame_len);
4357 if (is_tso)
4358 qeth_fill_tso_ext((struct qeth_hdr_tso *) hdr,
4359 frame_len - proto_len, skb, proto_len);
4360
4361 if (IS_IQD(card)) {
4362 rc = __qeth_xmit(card, queue, skb, elements, hdr, data_offset,
4363 hd_len);
4364 } else {
4365 /* TODO: drop skb_orphan() once TX completion is fast enough */
4366 skb_orphan(skb);
4367 spin_lock(&queue->lock);
4368 rc = qeth_do_send_packet(card, queue, skb, hdr, data_offset,
4369 hd_len, elements);
4370 spin_unlock(&queue->lock);
4371 }
4372
4373 if (rc && !push_len)
4374 kmem_cache_free(qeth_core_header_cache, hdr);
4375
4376 return rc;
4377 }
4378 EXPORT_SYMBOL_GPL(qeth_xmit);
4379
4380 static int qeth_setadp_promisc_mode_cb(struct qeth_card *card,
4381 struct qeth_reply *reply, unsigned long data)
4382 {
4383 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4384 struct qeth_ipacmd_setadpparms *setparms;
4385
4386 QETH_CARD_TEXT(card, 4, "prmadpcb");
4387
4388 setparms = &(cmd->data.setadapterparms);
4389 if (qeth_setadpparms_inspect_rc(cmd)) {
4390 QETH_CARD_TEXT_(card, 4, "prmrc%x", cmd->hdr.return_code);
4391 setparms->data.mode = SET_PROMISC_MODE_OFF;
4392 }
4393 card->info.promisc_mode = setparms->data.mode;
4394 return (cmd->hdr.return_code) ? -EIO : 0;
4395 }
4396
4397 void qeth_setadp_promisc_mode(struct qeth_card *card, bool enable)
4398 {
4399 enum qeth_ipa_promisc_modes mode = enable ? SET_PROMISC_MODE_ON :
4400 SET_PROMISC_MODE_OFF;
4401 struct qeth_cmd_buffer *iob;
4402 struct qeth_ipa_cmd *cmd;
4403
4404 QETH_CARD_TEXT(card, 4, "setprom");
4405 QETH_CARD_TEXT_(card, 4, "mode:%x", mode);
4406
4407 iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE,
4408 SETADP_DATA_SIZEOF(mode));
4409 if (!iob)
4410 return;
4411 cmd = __ipa_cmd(iob);
4412 cmd->data.setadapterparms.data.mode = mode;
4413 qeth_send_ipa_cmd(card, iob, qeth_setadp_promisc_mode_cb, NULL);
4414 }
4415 EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode);
4416
4417 static int qeth_setadpparms_change_macaddr_cb(struct qeth_card *card,
4418 struct qeth_reply *reply, unsigned long data)
4419 {
4420 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4421 struct qeth_ipacmd_setadpparms *adp_cmd;
4422
4423 QETH_CARD_TEXT(card, 4, "chgmaccb");
4424 if (qeth_setadpparms_inspect_rc(cmd))
4425 return -EIO;
4426
4427 adp_cmd = &cmd->data.setadapterparms;
4428 if (!is_valid_ether_addr(adp_cmd->data.change_addr.addr))
4429 return -EADDRNOTAVAIL;
4430
4431 if (IS_LAYER2(card) && IS_OSD(card) && !IS_VM_NIC(card) &&
4432 !(adp_cmd->hdr.flags & QETH_SETADP_FLAGS_VIRTUAL_MAC))
4433 return -EADDRNOTAVAIL;
4434
4435 eth_hw_addr_set(card->dev, adp_cmd->data.change_addr.addr);
4436 return 0;
4437 }
4438
4439 int qeth_setadpparms_change_macaddr(struct qeth_card *card)
4440 {
4441 int rc;
4442 struct qeth_cmd_buffer *iob;
4443 struct qeth_ipa_cmd *cmd;
4444
4445 QETH_CARD_TEXT(card, 4, "chgmac");
4446
4447 iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS,
4448 SETADP_DATA_SIZEOF(change_addr));
4449 if (!iob)
4450 return -ENOMEM;
4451 cmd = __ipa_cmd(iob);
4452 cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC;
4453 cmd->data.setadapterparms.data.change_addr.addr_size = ETH_ALEN;
4454 ether_addr_copy(cmd->data.setadapterparms.data.change_addr.addr,
4455 card->dev->dev_addr);
4456 rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_change_macaddr_cb,
4457 NULL);
4458 return rc;
4459 }
4460 EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr);
4461
4462 static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card,
4463 struct qeth_reply *reply, unsigned long data)
4464 {
4465 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4466 struct qeth_set_access_ctrl *access_ctrl_req;
4467
4468 QETH_CARD_TEXT(card, 4, "setaccb");
4469
4470 access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4471 QETH_CARD_TEXT_(card, 2, "rc=%d",
4472 cmd->data.setadapterparms.hdr.return_code);
4473 if (cmd->data.setadapterparms.hdr.return_code !=
4474 SET_ACCESS_CTRL_RC_SUCCESS)
4475 QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%#x) on device %x: %#x\n",
4476 access_ctrl_req->subcmd_code, CARD_DEVID(card),
4477 cmd->data.setadapterparms.hdr.return_code);
4478 switch (qeth_setadpparms_inspect_rc(cmd)) {
4479 case SET_ACCESS_CTRL_RC_SUCCESS:
4480 if (access_ctrl_req->subcmd_code == ISOLATION_MODE_NONE)
4481 dev_info(&card->gdev->dev,
4482 "QDIO data connection isolation is deactivated\n");
4483 else
4484 dev_info(&card->gdev->dev,
4485 "QDIO data connection isolation is activated\n");
4486 return 0;
4487 case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
4488 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already deactivated\n",
4489 CARD_DEVID(card));
4490 return 0;
4491 case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
4492 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already activated\n",
4493 CARD_DEVID(card));
4494 return 0;
4495 case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
4496 dev_err(&card->gdev->dev, "Adapter does not "
4497 "support QDIO data connection isolation\n");
4498 return -EOPNOTSUPP;
4499 case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
4500 dev_err(&card->gdev->dev,
4501 "Adapter is dedicated. "
4502 "QDIO data connection isolation not supported\n");
4503 return -EOPNOTSUPP;
4504 case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
4505 dev_err(&card->gdev->dev,
4506 "TSO does not permit QDIO data connection isolation\n");
4507 return -EPERM;
4508 case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED:
4509 dev_err(&card->gdev->dev, "The adjacent switch port does not "
4510 "support reflective relay mode\n");
4511 return -EOPNOTSUPP;
4512 case SET_ACCESS_CTRL_RC_REFLREL_FAILED:
4513 dev_err(&card->gdev->dev, "The reflective relay mode cannot be "
4514 "enabled at the adjacent switch port");
4515 return -EREMOTEIO;
4516 case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED:
4517 dev_warn(&card->gdev->dev, "Turning off reflective relay mode "
4518 "at the adjacent switch failed\n");
4519 /* benign error while disabling ISOLATION_MODE_FWD */
4520 return 0;
4521 default:
4522 return -EIO;
4523 }
4524 }
4525
4526 int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
4527 enum qeth_ipa_isolation_modes mode)
4528 {
4529 int rc;
4530 struct qeth_cmd_buffer *iob;
4531 struct qeth_ipa_cmd *cmd;
4532 struct qeth_set_access_ctrl *access_ctrl_req;
4533
4534 QETH_CARD_TEXT(card, 4, "setacctl");
4535
4536 if (!qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
4537 dev_err(&card->gdev->dev,
4538 "Adapter does not support QDIO data connection isolation\n");
4539 return -EOPNOTSUPP;
4540 }
4541
4542 iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
4543 SETADP_DATA_SIZEOF(set_access_ctrl));
4544 if (!iob)
4545 return -ENOMEM;
4546 cmd = __ipa_cmd(iob);
4547 access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4548 access_ctrl_req->subcmd_code = mode;
4549
4550 rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb,
4551 NULL);
4552 if (rc) {
4553 QETH_CARD_TEXT_(card, 2, "rc=%d", rc);
4554 QETH_DBF_MESSAGE(3, "IPA(SET_ACCESS_CTRL(%d) on device %x: sent failed\n",
4555 rc, CARD_DEVID(card));
4556 }
4557
4558 return rc;
4559 }
4560
4561 void qeth_tx_timeout(struct net_device *dev, unsigned int txqueue)
4562 {
4563 struct qeth_card *card;
4564
4565 card = dev->ml_priv;
4566 QETH_CARD_TEXT(card, 4, "txtimeo");
4567 qeth_schedule_recovery(card);
4568 }
4569 EXPORT_SYMBOL_GPL(qeth_tx_timeout);
4570
4571 static int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum)
4572 {
4573 struct qeth_card *card = dev->ml_priv;
4574 int rc = 0;
4575
4576 switch (regnum) {
4577 case MII_BMCR: /* Basic mode control register */
4578 rc = BMCR_FULLDPLX;
4579 if ((card->info.link_type != QETH_LINK_TYPE_GBIT_ETH) &&
4580 (card->info.link_type != QETH_LINK_TYPE_10GBIT_ETH) &&
4581 (card->info.link_type != QETH_LINK_TYPE_25GBIT_ETH))
4582 rc |= BMCR_SPEED100;
4583 break;
4584 case MII_BMSR: /* Basic mode status register */
4585 rc = BMSR_ERCAP | BMSR_ANEGCOMPLETE | BMSR_LSTATUS |
4586 BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL |
4587 BMSR_100BASE4;
4588 break;
4589 case MII_PHYSID1: /* PHYS ID 1 */
4590 rc = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 8) |
4591 dev->dev_addr[2];
4592 rc = (rc >> 5) & 0xFFFF;
4593 break;
4594 case MII_PHYSID2: /* PHYS ID 2 */
4595 rc = (dev->dev_addr[2] << 10) & 0xFFFF;
4596 break;
4597 case MII_ADVERTISE: /* Advertisement control reg */
4598 rc = ADVERTISE_ALL;
4599 break;
4600 case MII_LPA: /* Link partner ability reg */
4601 rc = LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL |
4602 LPA_100BASE4 | LPA_LPACK;
4603 break;
4604 case MII_EXPANSION: /* Expansion register */
4605 break;
4606 case MII_DCOUNTER: /* disconnect counter */
4607 break;
4608 case MII_FCSCOUNTER: /* false carrier counter */
4609 break;
4610 case MII_NWAYTEST: /* N-way auto-neg test register */
4611 break;
4612 case MII_RERRCOUNTER: /* rx error counter */
4613 rc = card->stats.rx_length_errors +
4614 card->stats.rx_frame_errors +
4615 card->stats.rx_fifo_errors;
4616 break;
4617 case MII_SREVISION: /* silicon revision */
4618 break;
4619 case MII_RESV1: /* reserved 1 */
4620 break;
4621 case MII_LBRERROR: /* loopback, rx, bypass error */
4622 break;
4623 case MII_PHYADDR: /* physical address */
4624 break;
4625 case MII_RESV2: /* reserved 2 */
4626 break;
4627 case MII_TPISTATUS: /* TPI status for 10mbps */
4628 break;
4629 case MII_NCONFIG: /* network interface config */
4630 break;
4631 default:
4632 break;
4633 }
4634 return rc;
4635 }
4636
4637 static int qeth_snmp_command_cb(struct qeth_card *card,
4638 struct qeth_reply *reply, unsigned long data)
4639 {
4640 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4641 struct qeth_arp_query_info *qinfo = reply->param;
4642 struct qeth_ipacmd_setadpparms *adp_cmd;
4643 unsigned int data_len;
4644 void *snmp_data;
4645
4646 QETH_CARD_TEXT(card, 3, "snpcmdcb");
4647
4648 if (cmd->hdr.return_code) {
4649 QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code);
4650 return -EIO;
4651 }
4652 if (cmd->data.setadapterparms.hdr.return_code) {
4653 cmd->hdr.return_code =
4654 cmd->data.setadapterparms.hdr.return_code;
4655 QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code);
4656 return -EIO;
4657 }
4658
4659 adp_cmd = &cmd->data.setadapterparms;
4660 data_len = adp_cmd->hdr.cmdlength - sizeof(adp_cmd->hdr);
4661 if (adp_cmd->hdr.seq_no == 1) {
4662 snmp_data = &adp_cmd->data.snmp;
4663 } else {
4664 snmp_data = &adp_cmd->data.snmp.request;
4665 data_len -= offsetof(struct qeth_snmp_cmd, request);
4666 }
4667
4668 /* check if there is enough room in userspace */
4669 if ((qinfo->udata_len - qinfo->udata_offset) < data_len) {
4670 QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOSPC);
4671 return -ENOSPC;
4672 }
4673 QETH_CARD_TEXT_(card, 4, "snore%i",
4674 cmd->data.setadapterparms.hdr.used_total);
4675 QETH_CARD_TEXT_(card, 4, "sseqn%i",
4676 cmd->data.setadapterparms.hdr.seq_no);
4677 /*copy entries to user buffer*/
4678 memcpy(qinfo->udata + qinfo->udata_offset, snmp_data, data_len);
4679 qinfo->udata_offset += data_len;
4680
4681 if (cmd->data.setadapterparms.hdr.seq_no <
4682 cmd->data.setadapterparms.hdr.used_total)
4683 return 1;
4684 return 0;
4685 }
4686
4687 static int qeth_snmp_command(struct qeth_card *card, char __user *udata)
4688 {
4689 struct qeth_snmp_ureq __user *ureq;
4690 struct qeth_cmd_buffer *iob;
4691 unsigned int req_len;
4692 struct qeth_arp_query_info qinfo = {0, };
4693 int rc = 0;
4694
4695 QETH_CARD_TEXT(card, 3, "snmpcmd");
4696
4697 if (IS_VM_NIC(card))
4698 return -EOPNOTSUPP;
4699
4700 if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) &&
4701 IS_LAYER3(card))
4702 return -EOPNOTSUPP;
4703
4704 ureq = (struct qeth_snmp_ureq __user *) udata;
4705 if (get_user(qinfo.udata_len, &ureq->hdr.data_len) ||
4706 get_user(req_len, &ureq->hdr.req_len))
4707 return -EFAULT;
4708
4709 /* Sanitize user input, to avoid overflows in iob size calculation: */
4710 if (req_len > QETH_BUFSIZE)
4711 return -EINVAL;
4712
4713 iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL, req_len);
4714 if (!iob)
4715 return -ENOMEM;
4716
4717 if (copy_from_user(&__ipa_cmd(iob)->data.setadapterparms.data.snmp,
4718 &ureq->cmd, req_len)) {
4719 qeth_put_cmd(iob);
4720 return -EFAULT;
4721 }
4722
4723 qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
4724 if (!qinfo.udata) {
4725 qeth_put_cmd(iob);
4726 return -ENOMEM;
4727 }
4728 qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr);
4729
4730 rc = qeth_send_ipa_cmd(card, iob, qeth_snmp_command_cb, &qinfo);
4731 if (rc)
4732 QETH_DBF_MESSAGE(2, "SNMP command failed on device %x: (%#x)\n",
4733 CARD_DEVID(card), rc);
4734 else {
4735 if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
4736 rc = -EFAULT;
4737 }
4738
4739 kfree(qinfo.udata);
4740 return rc;
4741 }
4742
4743 static int qeth_setadpparms_query_oat_cb(struct qeth_card *card,
4744 struct qeth_reply *reply,
4745 unsigned long data)
4746 {
4747 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4748 struct qeth_qoat_priv *priv = reply->param;
4749 int resdatalen;
4750
4751 QETH_CARD_TEXT(card, 3, "qoatcb");
4752 if (qeth_setadpparms_inspect_rc(cmd))
4753 return -EIO;
4754
4755 resdatalen = cmd->data.setadapterparms.hdr.cmdlength;
4756
4757 if (resdatalen > (priv->buffer_len - priv->response_len))
4758 return -ENOSPC;
4759
4760 memcpy(priv->buffer + priv->response_len,
4761 &cmd->data.setadapterparms.hdr, resdatalen);
4762 priv->response_len += resdatalen;
4763
4764 if (cmd->data.setadapterparms.hdr.seq_no <
4765 cmd->data.setadapterparms.hdr.used_total)
4766 return 1;
4767 return 0;
4768 }
4769
4770 static int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
4771 {
4772 int rc = 0;
4773 struct qeth_cmd_buffer *iob;
4774 struct qeth_ipa_cmd *cmd;
4775 struct qeth_query_oat *oat_req;
4776 struct qeth_query_oat_data oat_data;
4777 struct qeth_qoat_priv priv;
4778 void __user *tmp;
4779
4780 QETH_CARD_TEXT(card, 3, "qoatcmd");
4781
4782 if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT))
4783 return -EOPNOTSUPP;
4784
4785 if (copy_from_user(&oat_data, udata, sizeof(oat_data)))
4786 return -EFAULT;
4787
4788 priv.buffer_len = oat_data.buffer_len;
4789 priv.response_len = 0;
4790 priv.buffer = vzalloc(oat_data.buffer_len);
4791 if (!priv.buffer)
4792 return -ENOMEM;
4793
4794 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4795 SETADP_DATA_SIZEOF(query_oat));
4796 if (!iob) {
4797 rc = -ENOMEM;
4798 goto out_free;
4799 }
4800 cmd = __ipa_cmd(iob);
4801 oat_req = &cmd->data.setadapterparms.data.query_oat;
4802 oat_req->subcmd_code = oat_data.command;
4803
4804 rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb, &priv);
4805 if (!rc) {
4806 tmp = is_compat_task() ? compat_ptr(oat_data.ptr) :
4807 u64_to_user_ptr(oat_data.ptr);
4808 oat_data.response_len = priv.response_len;
4809
4810 if (copy_to_user(tmp, priv.buffer, priv.response_len) ||
4811 copy_to_user(udata, &oat_data, sizeof(oat_data)))
4812 rc = -EFAULT;
4813 }
4814
4815 out_free:
4816 vfree(priv.buffer);
4817 return rc;
4818 }
4819
4820 static int qeth_init_link_info_oat_cb(struct qeth_card *card,
4821 struct qeth_reply *reply_priv,
4822 unsigned long data)
4823 {
4824 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4825 struct qeth_link_info *link_info = reply_priv->param;
4826 struct qeth_query_oat_physical_if *phys_if;
4827 struct qeth_query_oat_reply *reply;
4828
4829 QETH_CARD_TEXT(card, 2, "qoatincb");
4830 if (qeth_setadpparms_inspect_rc(cmd))
4831 return -EIO;
4832
4833 /* Multi-part reply is unexpected, don't bother: */
4834 if (cmd->data.setadapterparms.hdr.used_total > 1)
4835 return -EINVAL;
4836
4837 /* Expect the reply to start with phys_if data: */
4838 reply = &cmd->data.setadapterparms.data.query_oat.reply[0];
4839 if (reply->type != QETH_QOAT_REPLY_TYPE_PHYS_IF ||
4840 reply->length < sizeof(*reply))
4841 return -EINVAL;
4842
4843 phys_if = &reply->phys_if;
4844
4845 switch (phys_if->speed_duplex) {
4846 case QETH_QOAT_PHYS_SPEED_10M_HALF:
4847 link_info->speed = SPEED_10;
4848 link_info->duplex = DUPLEX_HALF;
4849 break;
4850 case QETH_QOAT_PHYS_SPEED_10M_FULL:
4851 link_info->speed = SPEED_10;
4852 link_info->duplex = DUPLEX_FULL;
4853 break;
4854 case QETH_QOAT_PHYS_SPEED_100M_HALF:
4855 link_info->speed = SPEED_100;
4856 link_info->duplex = DUPLEX_HALF;
4857 break;
4858 case QETH_QOAT_PHYS_SPEED_100M_FULL:
4859 link_info->speed = SPEED_100;
4860 link_info->duplex = DUPLEX_FULL;
4861 break;
4862 case QETH_QOAT_PHYS_SPEED_1000M_HALF:
4863 link_info->speed = SPEED_1000;
4864 link_info->duplex = DUPLEX_HALF;
4865 break;
4866 case QETH_QOAT_PHYS_SPEED_1000M_FULL:
4867 link_info->speed = SPEED_1000;
4868 link_info->duplex = DUPLEX_FULL;
4869 break;
4870 case QETH_QOAT_PHYS_SPEED_10G_FULL:
4871 link_info->speed = SPEED_10000;
4872 link_info->duplex = DUPLEX_FULL;
4873 break;
4874 case QETH_QOAT_PHYS_SPEED_25G_FULL:
4875 link_info->speed = SPEED_25000;
4876 link_info->duplex = DUPLEX_FULL;
4877 break;
4878 case QETH_QOAT_PHYS_SPEED_UNKNOWN:
4879 default:
4880 link_info->speed = SPEED_UNKNOWN;
4881 link_info->duplex = DUPLEX_UNKNOWN;
4882 break;
4883 }
4884
4885 switch (phys_if->media_type) {
4886 case QETH_QOAT_PHYS_MEDIA_COPPER:
4887 link_info->port = PORT_TP;
4888 link_info->link_mode = QETH_LINK_MODE_UNKNOWN;
4889 break;
4890 case QETH_QOAT_PHYS_MEDIA_FIBRE_SHORT:
4891 link_info->port = PORT_FIBRE;
4892 link_info->link_mode = QETH_LINK_MODE_FIBRE_SHORT;
4893 break;
4894 case QETH_QOAT_PHYS_MEDIA_FIBRE_LONG:
4895 link_info->port = PORT_FIBRE;
4896 link_info->link_mode = QETH_LINK_MODE_FIBRE_LONG;
4897 break;
4898 default:
4899 link_info->port = PORT_OTHER;
4900 link_info->link_mode = QETH_LINK_MODE_UNKNOWN;
4901 break;
4902 }
4903
4904 return 0;
4905 }
4906
4907 static void qeth_init_link_info(struct qeth_card *card)
4908 {
4909 qeth_default_link_info(card);
4910
4911 /* Get more accurate data via QUERY OAT: */
4912 if (qeth_adp_supported(card, IPA_SETADP_QUERY_OAT)) {
4913 struct qeth_link_info link_info;
4914 struct qeth_cmd_buffer *iob;
4915
4916 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4917 SETADP_DATA_SIZEOF(query_oat));
4918 if (iob) {
4919 struct qeth_ipa_cmd *cmd = __ipa_cmd(iob);
4920 struct qeth_query_oat *oat_req;
4921
4922 oat_req = &cmd->data.setadapterparms.data.query_oat;
4923 oat_req->subcmd_code = QETH_QOAT_SCOPE_INTERFACE;
4924
4925 if (!qeth_send_ipa_cmd(card, iob,
4926 qeth_init_link_info_oat_cb,
4927 &link_info)) {
4928 if (link_info.speed != SPEED_UNKNOWN)
4929 card->info.link_info.speed = link_info.speed;
4930 if (link_info.duplex != DUPLEX_UNKNOWN)
4931 card->info.link_info.duplex = link_info.duplex;
4932 if (link_info.port != PORT_OTHER)
4933 card->info.link_info.port = link_info.port;
4934 if (link_info.link_mode != QETH_LINK_MODE_UNKNOWN)
4935 card->info.link_info.link_mode = link_info.link_mode;
4936 }
4937 }
4938 }
4939 }
4940
4941 /**
4942 * qeth_vm_request_mac() - Request a hypervisor-managed MAC address
4943 * @card: pointer to a qeth_card
4944 *
4945 * Returns
4946 * 0, if a MAC address has been set for the card's netdevice
4947 * a return code, for various error conditions
4948 */
4949 int qeth_vm_request_mac(struct qeth_card *card)
4950 {
4951 struct diag26c_mac_resp *response;
4952 struct diag26c_mac_req *request;
4953 int rc;
4954
4955 QETH_CARD_TEXT(card, 2, "vmreqmac");
4956
4957 request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
4958 response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
4959 if (!request || !response) {
4960 rc = -ENOMEM;
4961 goto out;
4962 }
4963
4964 request->resp_buf_len = sizeof(*response);
4965 request->resp_version = DIAG26C_VERSION2;
4966 request->op_code = DIAG26C_GET_MAC;
4967 request->devno = card->info.ddev_devno;
4968
4969 QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4970 rc = diag26c(request, response, DIAG26C_MAC_SERVICES);
4971 QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4972 if (rc)
4973 goto out;
4974 QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
4975
4976 if (request->resp_buf_len < sizeof(*response) ||
4977 response->version != request->resp_version) {
4978 rc = -EIO;
4979 QETH_CARD_TEXT(card, 2, "badresp");
4980 QETH_CARD_HEX(card, 2, &request->resp_buf_len,
4981 sizeof(request->resp_buf_len));
4982 } else if (!is_valid_ether_addr(response->mac)) {
4983 rc = -EINVAL;
4984 QETH_CARD_TEXT(card, 2, "badmac");
4985 QETH_CARD_HEX(card, 2, response->mac, ETH_ALEN);
4986 } else {
4987 eth_hw_addr_set(card->dev, response->mac);
4988 }
4989
4990 out:
4991 kfree(response);
4992 kfree(request);
4993 return rc;
4994 }
4995 EXPORT_SYMBOL_GPL(qeth_vm_request_mac);
4996
4997 static void qeth_determine_capabilities(struct qeth_card *card)
4998 {
4999 struct qeth_channel *channel = &card->data;
5000 struct ccw_device *ddev = channel->ccwdev;
5001 int rc;
5002 int ddev_offline = 0;
5003
5004 QETH_CARD_TEXT(card, 2, "detcapab");
5005 if (!ddev->online) {
5006 ddev_offline = 1;
5007 rc = qeth_start_channel(channel);
5008 if (rc) {
5009 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
5010 goto out;
5011 }
5012 }
5013
5014 rc = qeth_read_conf_data(card);
5015 if (rc) {
5016 QETH_DBF_MESSAGE(2, "qeth_read_conf_data on device %x returned %i\n",
5017 CARD_DEVID(card), rc);
5018 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
5019 goto out_offline;
5020 }
5021
5022 rc = qdio_get_ssqd_desc(ddev, &card->ssqd);
5023 if (rc)
5024 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
5025
5026 QETH_CARD_TEXT_(card, 2, "qfmt%d", card->ssqd.qfmt);
5027 QETH_CARD_TEXT_(card, 2, "ac1:%02x", card->ssqd.qdioac1);
5028 QETH_CARD_TEXT_(card, 2, "ac2:%04x", card->ssqd.qdioac2);
5029 QETH_CARD_TEXT_(card, 2, "ac3:%04x", card->ssqd.qdioac3);
5030 QETH_CARD_TEXT_(card, 2, "icnt%d", card->ssqd.icnt);
5031 if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) ||
5032 ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) ||
5033 ((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) {
5034 dev_info(&card->gdev->dev,
5035 "Completion Queueing supported\n");
5036 } else {
5037 card->options.cq = QETH_CQ_NOTAVAILABLE;
5038 }
5039
5040 out_offline:
5041 if (ddev_offline == 1)
5042 qeth_stop_channel(channel);
5043 out:
5044 return;
5045 }
5046
5047 static void qeth_read_ccw_conf_data(struct qeth_card *card)
5048 {
5049 struct qeth_card_info *info = &card->info;
5050 struct ccw_device *cdev = CARD_DDEV(card);
5051 struct ccw_dev_id dev_id;
5052
5053 QETH_CARD_TEXT(card, 2, "ccwconfd");
5054 ccw_device_get_id(cdev, &dev_id);
5055
5056 info->ddev_devno = dev_id.devno;
5057 info->ids_valid = !ccw_device_get_cssid(cdev, &info->cssid) &&
5058 !ccw_device_get_iid(cdev, &info->iid) &&
5059 !ccw_device_get_chid(cdev, 0, &info->chid);
5060 info->ssid = dev_id.ssid;
5061
5062 dev_info(&card->gdev->dev, "CHID: %x CHPID: %x\n",
5063 info->chid, info->chpid);
5064
5065 QETH_CARD_TEXT_(card, 3, "devn%x", info->ddev_devno);
5066 QETH_CARD_TEXT_(card, 3, "cssid:%x", info->cssid);
5067 QETH_CARD_TEXT_(card, 3, "iid:%x", info->iid);
5068 QETH_CARD_TEXT_(card, 3, "ssid:%x", info->ssid);
5069 QETH_CARD_TEXT_(card, 3, "chpid:%x", info->chpid);
5070 QETH_CARD_TEXT_(card, 3, "chid:%x", info->chid);
5071 QETH_CARD_TEXT_(card, 3, "idval%x", info->ids_valid);
5072 }
5073
5074 static int qeth_qdio_establish(struct qeth_card *card)
5075 {
5076 struct qdio_buffer **out_sbal_ptrs[QETH_MAX_OUT_QUEUES];
5077 struct qdio_buffer **in_sbal_ptrs[QETH_MAX_IN_QUEUES];
5078 struct qeth_qib_parms *qib_parms = NULL;
5079 struct qdio_initialize init_data;
5080 unsigned int no_input_qs = 1;
5081 unsigned int i;
5082 int rc = 0;
5083
5084 QETH_CARD_TEXT(card, 2, "qdioest");
5085
5086 if (!IS_IQD(card) && !IS_VM_NIC(card)) {
5087 qib_parms = kzalloc(sizeof_field(struct qib, parm), GFP_KERNEL);
5088 if (!qib_parms)
5089 return -ENOMEM;
5090
5091 qeth_fill_qib_parms(card, qib_parms);
5092 }
5093
5094 in_sbal_ptrs[0] = card->qdio.in_q->qdio_bufs;
5095 if (card->options.cq == QETH_CQ_ENABLED) {
5096 in_sbal_ptrs[1] = card->qdio.c_q->qdio_bufs;
5097 no_input_qs++;
5098 }
5099
5100 for (i = 0; i < card->qdio.no_out_queues; i++)
5101 out_sbal_ptrs[i] = card->qdio.out_qs[i]->qdio_bufs;
5102
5103 memset(&init_data, 0, sizeof(struct qdio_initialize));
5104 init_data.q_format = IS_IQD(card) ? QDIO_IQDIO_QFMT :
5105 QDIO_QETH_QFMT;
5106 init_data.qib_param_field_format = 0;
5107 init_data.qib_param_field = (void *)qib_parms;
5108 init_data.no_input_qs = no_input_qs;
5109 init_data.no_output_qs = card->qdio.no_out_queues;
5110 init_data.input_handler = qeth_qdio_input_handler;
5111 init_data.output_handler = qeth_qdio_output_handler;
5112 init_data.irq_poll = qeth_qdio_poll;
5113 init_data.int_parm = (unsigned long) card;
5114 init_data.input_sbal_addr_array = in_sbal_ptrs;
5115 init_data.output_sbal_addr_array = out_sbal_ptrs;
5116
5117 if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED,
5118 QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) {
5119 rc = qdio_allocate(CARD_DDEV(card), init_data.no_input_qs,
5120 init_data.no_output_qs);
5121 if (rc) {
5122 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5123 goto out;
5124 }
5125 rc = qdio_establish(CARD_DDEV(card), &init_data);
5126 if (rc) {
5127 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5128 qdio_free(CARD_DDEV(card));
5129 }
5130 }
5131
5132 switch (card->options.cq) {
5133 case QETH_CQ_ENABLED:
5134 dev_info(&card->gdev->dev, "Completion Queue support enabled");
5135 break;
5136 case QETH_CQ_DISABLED:
5137 dev_info(&card->gdev->dev, "Completion Queue support disabled");
5138 break;
5139 default:
5140 break;
5141 }
5142
5143 out:
5144 kfree(qib_parms);
5145 return rc;
5146 }
5147
5148 static void qeth_core_free_card(struct qeth_card *card)
5149 {
5150 QETH_CARD_TEXT(card, 2, "freecrd");
5151
5152 unregister_service_level(&card->qeth_service_level);
5153 debugfs_remove_recursive(card->debugfs);
5154 qeth_put_cmd(card->read_cmd);
5155 destroy_workqueue(card->event_wq);
5156 dev_set_drvdata(&card->gdev->dev, NULL);
5157 kfree(card);
5158 }
5159
5160 static void qeth_trace_features(struct qeth_card *card)
5161 {
5162 QETH_CARD_TEXT(card, 2, "features");
5163 QETH_CARD_HEX(card, 2, &card->options.ipa4, sizeof(card->options.ipa4));
5164 QETH_CARD_HEX(card, 2, &card->options.ipa6, sizeof(card->options.ipa6));
5165 QETH_CARD_HEX(card, 2, &card->options.adp, sizeof(card->options.adp));
5166 QETH_CARD_HEX(card, 2, &card->info.diagass_support,
5167 sizeof(card->info.diagass_support));
5168 }
5169
5170 static struct ccw_device_id qeth_ids[] = {
5171 {CCW_DEVICE_DEVTYPE(0x1731, 0x01, 0x1732, 0x01),
5172 .driver_info = QETH_CARD_TYPE_OSD},
5173 {CCW_DEVICE_DEVTYPE(0x1731, 0x05, 0x1732, 0x05),
5174 .driver_info = QETH_CARD_TYPE_IQD},
5175 {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x03),
5176 .driver_info = QETH_CARD_TYPE_OSM},
5177 #ifdef CONFIG_QETH_OSX
5178 {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02),
5179 .driver_info = QETH_CARD_TYPE_OSX},
5180 #endif
5181 {},
5182 };
5183 MODULE_DEVICE_TABLE(ccw, qeth_ids);
5184
5185 static struct ccw_driver qeth_ccw_driver = {
5186 .driver = {
5187 .owner = THIS_MODULE,
5188 .name = "qeth",
5189 },
5190 .ids = qeth_ids,
5191 .probe = ccwgroup_probe_ccwdev,
5192 .remove = ccwgroup_remove_ccwdev,
5193 };
5194
5195 static int qeth_hardsetup_card(struct qeth_card *card, bool *carrier_ok)
5196 {
5197 int retries = 3;
5198 int rc;
5199
5200 QETH_CARD_TEXT(card, 2, "hrdsetup");
5201 atomic_set(&card->force_alloc_skb, 0);
5202 rc = qeth_update_from_chp_desc(card);
5203 if (rc)
5204 return rc;
5205 retry:
5206 if (retries < 3)
5207 QETH_DBF_MESSAGE(2, "Retrying to do IDX activates on device %x.\n",
5208 CARD_DEVID(card));
5209 rc = qeth_qdio_clear_card(card, !IS_IQD(card));
5210 qeth_stop_channel(&card->data);
5211 qeth_stop_channel(&card->write);
5212 qeth_stop_channel(&card->read);
5213 qdio_free(CARD_DDEV(card));
5214
5215 rc = qeth_start_channel(&card->read);
5216 if (rc)
5217 goto retriable;
5218 rc = qeth_start_channel(&card->write);
5219 if (rc)
5220 goto retriable;
5221 rc = qeth_start_channel(&card->data);
5222 if (rc)
5223 goto retriable;
5224 retriable:
5225 if (rc == -ERESTARTSYS) {
5226 QETH_CARD_TEXT(card, 2, "break1");
5227 return rc;
5228 } else if (rc) {
5229 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
5230 if (--retries < 0)
5231 goto out;
5232 else
5233 goto retry;
5234 }
5235
5236 qeth_determine_capabilities(card);
5237 qeth_read_ccw_conf_data(card);
5238 qeth_idx_init(card);
5239
5240 rc = qeth_idx_activate_read_channel(card);
5241 if (rc == -EINTR) {
5242 QETH_CARD_TEXT(card, 2, "break2");
5243 return rc;
5244 } else if (rc) {
5245 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
5246 if (--retries < 0)
5247 goto out;
5248 else
5249 goto retry;
5250 }
5251
5252 rc = qeth_idx_activate_write_channel(card);
5253 if (rc == -EINTR) {
5254 QETH_CARD_TEXT(card, 2, "break3");
5255 return rc;
5256 } else if (rc) {
5257 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
5258 if (--retries < 0)
5259 goto out;
5260 else
5261 goto retry;
5262 }
5263 card->read_or_write_problem = 0;
5264 rc = qeth_mpc_initialize(card);
5265 if (rc) {
5266 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
5267 goto out;
5268 }
5269
5270 rc = qeth_send_startlan(card);
5271 if (rc) {
5272 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
5273 if (rc == -ENETDOWN) {
5274 dev_warn(&card->gdev->dev, "The LAN is offline\n");
5275 *carrier_ok = false;
5276 } else {
5277 goto out;
5278 }
5279 } else {
5280 *carrier_ok = true;
5281 }
5282
5283 card->options.ipa4.supported = 0;
5284 card->options.ipa6.supported = 0;
5285 card->options.adp.supported = 0;
5286 card->options.sbp.supported_funcs = 0;
5287 card->info.diagass_support = 0;
5288 rc = qeth_query_ipassists(card, QETH_PROT_IPV4);
5289 if (rc == -ENOMEM)
5290 goto out;
5291 if (qeth_is_supported(card, IPA_IPV6)) {
5292 rc = qeth_query_ipassists(card, QETH_PROT_IPV6);
5293 if (rc == -ENOMEM)
5294 goto out;
5295 }
5296 if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
5297 rc = qeth_query_setadapterparms(card);
5298 if (rc < 0) {
5299 QETH_CARD_TEXT_(card, 2, "7err%d", rc);
5300 goto out;
5301 }
5302 }
5303 if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
5304 rc = qeth_query_setdiagass(card);
5305 if (rc)
5306 QETH_CARD_TEXT_(card, 2, "8err%d", rc);
5307 }
5308
5309 qeth_trace_features(card);
5310
5311 if (!qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP) ||
5312 (card->info.hwtrap && qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM)))
5313 card->info.hwtrap = 0;
5314
5315 if (card->options.isolation != ISOLATION_MODE_NONE) {
5316 rc = qeth_setadpparms_set_access_ctrl(card,
5317 card->options.isolation);
5318 if (rc)
5319 goto out;
5320 }
5321
5322 qeth_init_link_info(card);
5323
5324 rc = qeth_init_qdio_queues(card);
5325 if (rc) {
5326 QETH_CARD_TEXT_(card, 2, "9err%d", rc);
5327 goto out;
5328 }
5329
5330 return 0;
5331 out:
5332 dev_warn(&card->gdev->dev, "The qeth device driver failed to recover "
5333 "an error on the device\n");
5334 QETH_DBF_MESSAGE(2, "Initialization for device %x failed in hardsetup! rc=%d\n",
5335 CARD_DEVID(card), rc);
5336 return rc;
5337 }
5338
5339 static int qeth_set_online(struct qeth_card *card,
5340 const struct qeth_discipline *disc)
5341 {
5342 bool carrier_ok;
5343 int rc;
5344
5345 mutex_lock(&card->conf_mutex);
5346 QETH_CARD_TEXT(card, 2, "setonlin");
5347
5348 rc = qeth_hardsetup_card(card, &carrier_ok);
5349 if (rc) {
5350 QETH_CARD_TEXT_(card, 2, "2err%04x", rc);
5351 rc = -ENODEV;
5352 goto err_hardsetup;
5353 }
5354
5355 qeth_print_status_message(card);
5356
5357 if (card->dev->reg_state != NETREG_REGISTERED)
5358 /* no need for locking / error handling at this early stage: */
5359 qeth_set_real_num_tx_queues(card, qeth_tx_actual_queues(card));
5360
5361 rc = disc->set_online(card, carrier_ok);
5362 if (rc)
5363 goto err_online;
5364
5365 /* let user_space know that device is online */
5366 kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE);
5367
5368 mutex_unlock(&card->conf_mutex);
5369 return 0;
5370
5371 err_online:
5372 err_hardsetup:
5373 qeth_qdio_clear_card(card, 0);
5374 qeth_clear_working_pool_list(card);
5375 qeth_flush_local_addrs(card);
5376
5377 qeth_stop_channel(&card->data);
5378 qeth_stop_channel(&card->write);
5379 qeth_stop_channel(&card->read);
5380 qdio_free(CARD_DDEV(card));
5381
5382 mutex_unlock(&card->conf_mutex);
5383 return rc;
5384 }
5385
5386 int qeth_set_offline(struct qeth_card *card, const struct qeth_discipline *disc,
5387 bool resetting)
5388 {
5389 int rc, rc2, rc3;
5390
5391 mutex_lock(&card->conf_mutex);
5392 QETH_CARD_TEXT(card, 3, "setoffl");
5393
5394 if ((!resetting && card->info.hwtrap) || card->info.hwtrap == 2) {
5395 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
5396 card->info.hwtrap = 1;
5397 }
5398
5399 /* cancel any stalled cmd that might block the rtnl: */
5400 qeth_clear_ipacmd_list(card);
5401
5402 rtnl_lock();
5403 netif_device_detach(card->dev);
5404 netif_carrier_off(card->dev);
5405 rtnl_unlock();
5406
5407 cancel_work_sync(&card->rx_mode_work);
5408
5409 disc->set_offline(card);
5410
5411 qeth_qdio_clear_card(card, 0);
5412 qeth_drain_output_queues(card);
5413 qeth_clear_working_pool_list(card);
5414 qeth_flush_local_addrs(card);
5415 card->info.promisc_mode = 0;
5416 qeth_default_link_info(card);
5417
5418 rc = qeth_stop_channel(&card->data);
5419 rc2 = qeth_stop_channel(&card->write);
5420 rc3 = qeth_stop_channel(&card->read);
5421 if (!rc)
5422 rc = (rc2) ? rc2 : rc3;
5423 if (rc)
5424 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
5425 qdio_free(CARD_DDEV(card));
5426
5427 /* let user_space know that device is offline */
5428 kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE);
5429
5430 mutex_unlock(&card->conf_mutex);
5431 return 0;
5432 }
5433 EXPORT_SYMBOL_GPL(qeth_set_offline);
5434
5435 static int qeth_do_reset(void *data)
5436 {
5437 const struct qeth_discipline *disc;
5438 struct qeth_card *card = data;
5439 int rc;
5440
5441 /* Lock-free, other users will block until we are done. */
5442 disc = card->discipline;
5443
5444 QETH_CARD_TEXT(card, 2, "recover1");
5445 if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
5446 return 0;
5447 QETH_CARD_TEXT(card, 2, "recover2");
5448 dev_warn(&card->gdev->dev,
5449 "A recovery process has been started for the device\n");
5450
5451 qeth_set_offline(card, disc, true);
5452 rc = qeth_set_online(card, disc);
5453 if (!rc) {
5454 dev_info(&card->gdev->dev,
5455 "Device successfully recovered!\n");
5456 } else {
5457 qeth_set_offline(card, disc, true);
5458 ccwgroup_set_offline(card->gdev, false);
5459 dev_warn(&card->gdev->dev,
5460 "The qeth device driver failed to recover an error on the device\n");
5461 }
5462 qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
5463 qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
5464 return 0;
5465 }
5466
5467 #if IS_ENABLED(CONFIG_QETH_L3)
5468 static void qeth_l3_rebuild_skb(struct qeth_card *card, struct sk_buff *skb,
5469 struct qeth_hdr *hdr)
5470 {
5471 struct af_iucv_trans_hdr *iucv = (struct af_iucv_trans_hdr *) skb->data;
5472 struct qeth_hdr_layer3 *l3_hdr = &hdr->hdr.l3;
5473 struct net_device *dev = skb->dev;
5474
5475 if (IS_IQD(card) && iucv->magic == ETH_P_AF_IUCV) {
5476 dev_hard_header(skb, dev, ETH_P_AF_IUCV, dev->dev_addr,
5477 "FAKELL", skb->len);
5478 return;
5479 }
5480
5481 if (!(l3_hdr->flags & QETH_HDR_PASSTHRU)) {
5482 u16 prot = (l3_hdr->flags & QETH_HDR_IPV6) ? ETH_P_IPV6 :
5483 ETH_P_IP;
5484 unsigned char tg_addr[ETH_ALEN];
5485
5486 skb_reset_network_header(skb);
5487 switch (l3_hdr->flags & QETH_HDR_CAST_MASK) {
5488 case QETH_CAST_MULTICAST:
5489 if (prot == ETH_P_IP)
5490 ip_eth_mc_map(ip_hdr(skb)->daddr, tg_addr);
5491 else
5492 ipv6_eth_mc_map(&ipv6_hdr(skb)->daddr, tg_addr);
5493 QETH_CARD_STAT_INC(card, rx_multicast);
5494 break;
5495 case QETH_CAST_BROADCAST:
5496 ether_addr_copy(tg_addr, dev->broadcast);
5497 QETH_CARD_STAT_INC(card, rx_multicast);
5498 break;
5499 default:
5500 if (card->options.sniffer)
5501 skb->pkt_type = PACKET_OTHERHOST;
5502 ether_addr_copy(tg_addr, dev->dev_addr);
5503 }
5504
5505 if (l3_hdr->ext_flags & QETH_HDR_EXT_SRC_MAC_ADDR)
5506 dev_hard_header(skb, dev, prot, tg_addr,
5507 &l3_hdr->next_hop.rx.src_mac, skb->len);
5508 else
5509 dev_hard_header(skb, dev, prot, tg_addr, "FAKELL",
5510 skb->len);
5511 }
5512
5513 /* copy VLAN tag from hdr into skb */
5514 if (!card->options.sniffer &&
5515 (l3_hdr->ext_flags & (QETH_HDR_EXT_VLAN_FRAME |
5516 QETH_HDR_EXT_INCLUDE_VLAN_TAG))) {
5517 u16 tag = (l3_hdr->ext_flags & QETH_HDR_EXT_VLAN_FRAME) ?
5518 l3_hdr->vlan_id :
5519 l3_hdr->next_hop.rx.vlan_id;
5520
5521 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag);
5522 }
5523 }
5524 #endif
5525
5526 static void qeth_receive_skb(struct qeth_card *card, struct sk_buff *skb,
5527 bool uses_frags, bool is_cso)
5528 {
5529 struct napi_struct *napi = &card->napi;
5530
5531 if (is_cso && (card->dev->features & NETIF_F_RXCSUM)) {
5532 skb->ip_summed = CHECKSUM_UNNECESSARY;
5533 QETH_CARD_STAT_INC(card, rx_skb_csum);
5534 } else {
5535 skb->ip_summed = CHECKSUM_NONE;
5536 }
5537
5538 QETH_CARD_STAT_ADD(card, rx_bytes, skb->len);
5539 QETH_CARD_STAT_INC(card, rx_packets);
5540 if (skb_is_nonlinear(skb)) {
5541 QETH_CARD_STAT_INC(card, rx_sg_skbs);
5542 QETH_CARD_STAT_ADD(card, rx_sg_frags,
5543 skb_shinfo(skb)->nr_frags);
5544 }
5545
5546 if (uses_frags) {
5547 napi_gro_frags(napi);
5548 } else {
5549 skb->protocol = eth_type_trans(skb, skb->dev);
5550 napi_gro_receive(napi, skb);
5551 }
5552 }
5553
5554 static void qeth_create_skb_frag(struct sk_buff *skb, char *data, int data_len)
5555 {
5556 struct page *page = virt_to_page(data);
5557 unsigned int next_frag;
5558
5559 next_frag = skb_shinfo(skb)->nr_frags;
5560 get_page(page);
5561 skb_add_rx_frag(skb, next_frag, page, offset_in_page(data), data_len,
5562 data_len);
5563 }
5564
5565 static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale)
5566 {
5567 return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY);
5568 }
5569
5570 static int qeth_extract_skb(struct qeth_card *card,
5571 struct qeth_qdio_buffer *qethbuffer, u8 *element_no,
5572 int *__offset)
5573 {
5574 struct qeth_priv *priv = netdev_priv(card->dev);
5575 struct qdio_buffer *buffer = qethbuffer->buffer;
5576 struct napi_struct *napi = &card->napi;
5577 struct qdio_buffer_element *element;
5578 unsigned int linear_len = 0;
5579 bool uses_frags = false;
5580 int offset = *__offset;
5581 bool use_rx_sg = false;
5582 unsigned int headroom;
5583 struct qeth_hdr *hdr;
5584 struct sk_buff *skb;
5585 int skb_len = 0;
5586 bool is_cso;
5587
5588 element = &buffer->element[*element_no];
5589
5590 next_packet:
5591 /* qeth_hdr must not cross element boundaries */
5592 while (element->length < offset + sizeof(struct qeth_hdr)) {
5593 if (qeth_is_last_sbale(element))
5594 return -ENODATA;
5595 element++;
5596 offset = 0;
5597 }
5598
5599 hdr = dma64_to_virt(element->addr) + offset;
5600 offset += sizeof(*hdr);
5601 skb = NULL;
5602
5603 switch (hdr->hdr.l2.id) {
5604 case QETH_HEADER_TYPE_LAYER2:
5605 skb_len = hdr->hdr.l2.pkt_length;
5606 is_cso = hdr->hdr.l2.flags[1] & QETH_HDR_EXT_CSUM_TRANSP_REQ;
5607
5608 linear_len = ETH_HLEN;
5609 headroom = 0;
5610 break;
5611 case QETH_HEADER_TYPE_LAYER3:
5612 skb_len = hdr->hdr.l3.length;
5613 is_cso = hdr->hdr.l3.ext_flags & QETH_HDR_EXT_CSUM_TRANSP_REQ;
5614
5615 if (!IS_LAYER3(card)) {
5616 QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5617 goto walk_packet;
5618 }
5619
5620 if (hdr->hdr.l3.flags & QETH_HDR_PASSTHRU) {
5621 linear_len = ETH_HLEN;
5622 headroom = 0;
5623 break;
5624 }
5625
5626 if (hdr->hdr.l3.flags & QETH_HDR_IPV6)
5627 linear_len = sizeof(struct ipv6hdr);
5628 else
5629 linear_len = sizeof(struct iphdr);
5630 headroom = ETH_HLEN;
5631 break;
5632 default:
5633 if (hdr->hdr.l2.id & QETH_HEADER_MASK_INVAL)
5634 QETH_CARD_STAT_INC(card, rx_frame_errors);
5635 else
5636 QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5637
5638 /* Can't determine packet length, drop the whole buffer. */
5639 return -EPROTONOSUPPORT;
5640 }
5641
5642 if (skb_len < linear_len) {
5643 QETH_CARD_STAT_INC(card, rx_dropped_runt);
5644 goto walk_packet;
5645 }
5646
5647 use_rx_sg = (card->options.cq == QETH_CQ_ENABLED) ||
5648 (skb_len > READ_ONCE(priv->rx_copybreak) &&
5649 !atomic_read(&card->force_alloc_skb));
5650
5651 if (use_rx_sg) {
5652 /* QETH_CQ_ENABLED only: */
5653 if (qethbuffer->rx_skb &&
5654 skb_tailroom(qethbuffer->rx_skb) >= linear_len + headroom) {
5655 skb = qethbuffer->rx_skb;
5656 qethbuffer->rx_skb = NULL;
5657 goto use_skb;
5658 }
5659
5660 skb = napi_get_frags(napi);
5661 if (!skb) {
5662 /* -ENOMEM, no point in falling back further. */
5663 QETH_CARD_STAT_INC(card, rx_dropped_nomem);
5664 goto walk_packet;
5665 }
5666
5667 if (skb_tailroom(skb) >= linear_len + headroom) {
5668 uses_frags = true;
5669 goto use_skb;
5670 }
5671
5672 netdev_info_once(card->dev,
5673 "Insufficient linear space in NAPI frags skb, need %u but have %u\n",
5674 linear_len + headroom, skb_tailroom(skb));
5675 /* Shouldn't happen. Don't optimize, fall back to linear skb. */
5676 }
5677
5678 linear_len = skb_len;
5679 skb = napi_alloc_skb(napi, linear_len + headroom);
5680 if (!skb) {
5681 QETH_CARD_STAT_INC(card, rx_dropped_nomem);
5682 goto walk_packet;
5683 }
5684
5685 use_skb:
5686 if (headroom)
5687 skb_reserve(skb, headroom);
5688 walk_packet:
5689 while (skb_len) {
5690 int data_len = min(skb_len, (int)(element->length - offset));
5691 char *data = dma64_to_virt(element->addr) + offset;
5692
5693 skb_len -= data_len;
5694 offset += data_len;
5695
5696 /* Extract data from current element: */
5697 if (skb && data_len) {
5698 if (linear_len) {
5699 unsigned int copy_len;
5700
5701 copy_len = min_t(unsigned int, linear_len,
5702 data_len);
5703
5704 skb_put_data(skb, data, copy_len);
5705 linear_len -= copy_len;
5706 data_len -= copy_len;
5707 data += copy_len;
5708 }
5709
5710 if (data_len)
5711 qeth_create_skb_frag(skb, data, data_len);
5712 }
5713
5714 /* Step forward to next element: */
5715 if (skb_len) {
5716 if (qeth_is_last_sbale(element)) {
5717 QETH_CARD_TEXT(card, 4, "unexeob");
5718 QETH_CARD_HEX(card, 2, buffer, sizeof(void *));
5719 if (skb) {
5720 if (uses_frags)
5721 napi_free_frags(napi);
5722 else
5723 kfree_skb(skb);
5724 QETH_CARD_STAT_INC(card,
5725 rx_length_errors);
5726 }
5727 return -EMSGSIZE;
5728 }
5729 element++;
5730 offset = 0;
5731 }
5732 }
5733
5734 /* This packet was skipped, go get another one: */
5735 if (!skb)
5736 goto next_packet;
5737
5738 *element_no = element - &buffer->element[0];
5739 *__offset = offset;
5740
5741 #if IS_ENABLED(CONFIG_QETH_L3)
5742 if (hdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER3)
5743 qeth_l3_rebuild_skb(card, skb, hdr);
5744 #endif
5745
5746 qeth_receive_skb(card, skb, uses_frags, is_cso);
5747 return 0;
5748 }
5749
5750 static unsigned int qeth_extract_skbs(struct qeth_card *card, int budget,
5751 struct qeth_qdio_buffer *buf, bool *done)
5752 {
5753 unsigned int work_done = 0;
5754
5755 while (budget) {
5756 if (qeth_extract_skb(card, buf, &card->rx.buf_element,
5757 &card->rx.e_offset)) {
5758 *done = true;
5759 break;
5760 }
5761
5762 work_done++;
5763 budget--;
5764 }
5765
5766 return work_done;
5767 }
5768
5769 static unsigned int qeth_rx_poll(struct qeth_card *card, int budget)
5770 {
5771 struct qeth_rx *ctx = &card->rx;
5772 unsigned int work_done = 0;
5773
5774 while (budget > 0) {
5775 struct qeth_qdio_buffer *buffer;
5776 unsigned int skbs_done = 0;
5777 bool done = false;
5778
5779 /* Fetch completed RX buffers: */
5780 if (!card->rx.b_count) {
5781 card->rx.qdio_err = 0;
5782 card->rx.b_count =
5783 qdio_inspect_input_queue(CARD_DDEV(card), 0,
5784 &card->rx.b_index,
5785 &card->rx.qdio_err);
5786 if (card->rx.b_count <= 0) {
5787 card->rx.b_count = 0;
5788 break;
5789 }
5790 }
5791
5792 /* Process one completed RX buffer: */
5793 buffer = &card->qdio.in_q->bufs[card->rx.b_index];
5794 if (!(card->rx.qdio_err &&
5795 qeth_check_qdio_errors(card, buffer->buffer,
5796 card->rx.qdio_err, "qinerr")))
5797 skbs_done = qeth_extract_skbs(card, budget, buffer,
5798 &done);
5799 else
5800 done = true;
5801
5802 work_done += skbs_done;
5803 budget -= skbs_done;
5804
5805 if (done) {
5806 QETH_CARD_STAT_INC(card, rx_bufs);
5807 qeth_put_buffer_pool_entry(card, buffer->pool_entry);
5808 buffer->pool_entry = NULL;
5809 card->rx.b_count--;
5810 ctx->bufs_refill++;
5811 ctx->bufs_refill -= qeth_rx_refill_queue(card,
5812 ctx->bufs_refill);
5813
5814 /* Step forward to next buffer: */
5815 card->rx.b_index = QDIO_BUFNR(card->rx.b_index + 1);
5816 card->rx.buf_element = 0;
5817 card->rx.e_offset = 0;
5818 }
5819 }
5820
5821 return work_done;
5822 }
5823
5824 static void qeth_cq_poll(struct qeth_card *card)
5825 {
5826 unsigned int work_done = 0;
5827
5828 while (work_done < QDIO_MAX_BUFFERS_PER_Q) {
5829 unsigned int start, error;
5830 int completed;
5831
5832 completed = qdio_inspect_input_queue(CARD_DDEV(card), 1, &start,
5833 &error);
5834 if (completed <= 0)
5835 return;
5836
5837 qeth_qdio_cq_handler(card, error, 1, start, completed);
5838 work_done += completed;
5839 }
5840 }
5841
5842 int qeth_poll(struct napi_struct *napi, int budget)
5843 {
5844 struct qeth_card *card = container_of(napi, struct qeth_card, napi);
5845 unsigned int work_done;
5846
5847 work_done = qeth_rx_poll(card, budget);
5848
5849 if (qeth_use_tx_irqs(card)) {
5850 struct qeth_qdio_out_q *queue;
5851 unsigned int i;
5852
5853 qeth_for_each_output_queue(card, queue, i) {
5854 if (!qeth_out_queue_is_empty(queue))
5855 napi_schedule(&queue->napi);
5856 }
5857 }
5858
5859 if (card->options.cq == QETH_CQ_ENABLED)
5860 qeth_cq_poll(card);
5861
5862 if (budget) {
5863 struct qeth_rx *ctx = &card->rx;
5864
5865 /* Process any substantial refill backlog: */
5866 ctx->bufs_refill -= qeth_rx_refill_queue(card, ctx->bufs_refill);
5867
5868 /* Exhausted the RX budget. Keep IRQ disabled, we get called again. */
5869 if (work_done >= budget)
5870 return work_done;
5871 }
5872
5873 if (napi_complete_done(napi, work_done) &&
5874 qdio_start_irq(CARD_DDEV(card)))
5875 napi_schedule(napi);
5876
5877 return work_done;
5878 }
5879 EXPORT_SYMBOL_GPL(qeth_poll);
5880
5881 static void qeth_iqd_tx_complete(struct qeth_qdio_out_q *queue,
5882 unsigned int bidx, unsigned int qdio_error,
5883 int budget)
5884 {
5885 struct qeth_qdio_out_buffer *buffer = queue->bufs[bidx];
5886 u8 sflags = buffer->buffer->element[15].sflags;
5887 struct qeth_card *card = queue->card;
5888 bool error = !!qdio_error;
5889
5890 if (qdio_error == QDIO_ERROR_SLSB_PENDING) {
5891 struct qaob *aob = buffer->aob;
5892 struct qeth_qaob_priv1 *priv;
5893 enum iucv_tx_notify notify;
5894
5895 if (!aob) {
5896 netdev_WARN_ONCE(card->dev,
5897 "Pending TX buffer %#x without QAOB on TX queue %u\n",
5898 bidx, queue->queue_no);
5899 qeth_schedule_recovery(card);
5900 return;
5901 }
5902
5903 QETH_CARD_TEXT_(card, 5, "pel%u", bidx);
5904
5905 priv = (struct qeth_qaob_priv1 *)&aob->user1;
5906 /* QAOB hasn't completed yet: */
5907 if (xchg(&priv->state, QETH_QAOB_PENDING) != QETH_QAOB_DONE) {
5908 qeth_notify_skbs(queue, buffer, TX_NOTIFY_PENDING);
5909
5910 /* Prepare the queue slot for immediate re-use: */
5911 qeth_scrub_qdio_buffer(buffer->buffer, queue->max_elements);
5912 if (qeth_alloc_out_buf(queue, bidx, GFP_ATOMIC)) {
5913 QETH_CARD_TEXT(card, 2, "outofbuf");
5914 qeth_schedule_recovery(card);
5915 }
5916
5917 list_add(&buffer->list_entry, &queue->pending_bufs);
5918 /* Skip clearing the buffer: */
5919 return;
5920 }
5921
5922 /* QAOB already completed: */
5923 notify = qeth_compute_cq_notification(aob->aorc, 0);
5924 qeth_notify_skbs(queue, buffer, notify);
5925 error = !!aob->aorc;
5926 memset(aob, 0, sizeof(*aob));
5927 } else if (card->options.cq == QETH_CQ_ENABLED) {
5928 qeth_notify_skbs(queue, buffer,
5929 qeth_compute_cq_notification(sflags, 0));
5930 }
5931
5932 qeth_clear_output_buffer(queue, buffer, error, budget);
5933 }
5934
5935 static int qeth_tx_poll(struct napi_struct *napi, int budget)
5936 {
5937 struct qeth_qdio_out_q *queue = qeth_napi_to_out_queue(napi);
5938 unsigned int queue_no = queue->queue_no;
5939 struct qeth_card *card = queue->card;
5940 struct net_device *dev = card->dev;
5941 unsigned int work_done = 0;
5942 struct netdev_queue *txq;
5943
5944 if (IS_IQD(card))
5945 txq = netdev_get_tx_queue(dev, qeth_iqd_translate_txq(dev, queue_no));
5946 else
5947 txq = netdev_get_tx_queue(dev, queue_no);
5948
5949 while (1) {
5950 unsigned int start, error, i;
5951 unsigned int packets = 0;
5952 unsigned int bytes = 0;
5953 int completed;
5954
5955 qeth_tx_complete_pending_bufs(card, queue, false, budget);
5956
5957 if (qeth_out_queue_is_empty(queue)) {
5958 napi_complete(napi);
5959 return 0;
5960 }
5961
5962 /* Give the CPU a breather: */
5963 if (work_done >= QDIO_MAX_BUFFERS_PER_Q) {
5964 QETH_TXQ_STAT_INC(queue, completion_yield);
5965 if (napi_complete_done(napi, 0))
5966 napi_schedule(napi);
5967 return 0;
5968 }
5969
5970 completed = qdio_inspect_output_queue(CARD_DDEV(card), queue_no,
5971 &start, &error);
5972 if (completed <= 0) {
5973 /* Ensure we see TX completion for pending work: */
5974 if (napi_complete_done(napi, 0) &&
5975 !atomic_read(&queue->set_pci_flags_count))
5976 qeth_tx_arm_timer(queue, queue->rescan_usecs);
5977 return 0;
5978 }
5979
5980 for (i = start; i < start + completed; i++) {
5981 struct qeth_qdio_out_buffer *buffer;
5982 unsigned int bidx = QDIO_BUFNR(i);
5983
5984 buffer = queue->bufs[bidx];
5985 packets += buffer->frames;
5986 bytes += buffer->bytes;
5987
5988 qeth_handle_send_error(card, buffer, error);
5989 if (IS_IQD(card))
5990 qeth_iqd_tx_complete(queue, bidx, error, budget);
5991 else
5992 qeth_clear_output_buffer(queue, buffer, error,
5993 budget);
5994 }
5995
5996 atomic_sub(completed, &queue->used_buffers);
5997 work_done += completed;
5998 if (IS_IQD(card))
5999 netdev_tx_completed_queue(txq, packets, bytes);
6000 else
6001 qeth_check_outbound_queue(queue);
6002
6003 /* xmit may have observed the full-condition, but not yet
6004 * stopped the txq. In which case the code below won't trigger.
6005 * So before returning, xmit will re-check the txq's fill level
6006 * and wake it up if needed.
6007 */
6008 if (netif_tx_queue_stopped(txq) &&
6009 !qeth_out_queue_is_full(queue))
6010 netif_tx_wake_queue(txq);
6011 }
6012 }
6013
6014 static int qeth_setassparms_inspect_rc(struct qeth_ipa_cmd *cmd)
6015 {
6016 if (!cmd->hdr.return_code)
6017 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
6018 return cmd->hdr.return_code;
6019 }
6020
6021 static int qeth_setassparms_get_caps_cb(struct qeth_card *card,
6022 struct qeth_reply *reply,
6023 unsigned long data)
6024 {
6025 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6026 struct qeth_ipa_caps *caps = reply->param;
6027
6028 if (qeth_setassparms_inspect_rc(cmd))
6029 return -EIO;
6030
6031 caps->supported = cmd->data.setassparms.data.caps.supported;
6032 caps->enabled = cmd->data.setassparms.data.caps.enabled;
6033 return 0;
6034 }
6035
6036 int qeth_setassparms_cb(struct qeth_card *card,
6037 struct qeth_reply *reply, unsigned long data)
6038 {
6039 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6040
6041 QETH_CARD_TEXT(card, 4, "defadpcb");
6042
6043 if (cmd->hdr.return_code)
6044 return -EIO;
6045
6046 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
6047 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
6048 card->options.ipa4.enabled = cmd->hdr.assists.enabled;
6049 if (cmd->hdr.prot_version == QETH_PROT_IPV6)
6050 card->options.ipa6.enabled = cmd->hdr.assists.enabled;
6051 return 0;
6052 }
6053 EXPORT_SYMBOL_GPL(qeth_setassparms_cb);
6054
6055 struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card,
6056 enum qeth_ipa_funcs ipa_func,
6057 u16 cmd_code,
6058 unsigned int data_length,
6059 enum qeth_prot_versions prot)
6060 {
6061 struct qeth_ipacmd_setassparms *setassparms;
6062 struct qeth_ipacmd_setassparms_hdr *hdr;
6063 struct qeth_cmd_buffer *iob;
6064
6065 QETH_CARD_TEXT(card, 4, "getasscm");
6066 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETASSPARMS, prot,
6067 data_length +
6068 offsetof(struct qeth_ipacmd_setassparms,
6069 data));
6070 if (!iob)
6071 return NULL;
6072
6073 setassparms = &__ipa_cmd(iob)->data.setassparms;
6074 setassparms->assist_no = ipa_func;
6075
6076 hdr = &setassparms->hdr;
6077 hdr->length = sizeof(*hdr) + data_length;
6078 hdr->command_code = cmd_code;
6079 return iob;
6080 }
6081 EXPORT_SYMBOL_GPL(qeth_get_setassparms_cmd);
6082
6083 int qeth_send_simple_setassparms_prot(struct qeth_card *card,
6084 enum qeth_ipa_funcs ipa_func,
6085 u16 cmd_code, u32 *data,
6086 enum qeth_prot_versions prot)
6087 {
6088 unsigned int length = data ? SETASS_DATA_SIZEOF(flags_32bit) : 0;
6089 struct qeth_cmd_buffer *iob;
6090
6091 QETH_CARD_TEXT_(card, 4, "simassp%i", prot);
6092 iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code, length, prot);
6093 if (!iob)
6094 return -ENOMEM;
6095
6096 if (data)
6097 __ipa_cmd(iob)->data.setassparms.data.flags_32bit = *data;
6098 return qeth_send_ipa_cmd(card, iob, qeth_setassparms_cb, NULL);
6099 }
6100 EXPORT_SYMBOL_GPL(qeth_send_simple_setassparms_prot);
6101
6102 static void qeth_unregister_dbf_views(void)
6103 {
6104 int x;
6105
6106 for (x = 0; x < QETH_DBF_INFOS; x++) {
6107 debug_unregister(qeth_dbf[x].id);
6108 qeth_dbf[x].id = NULL;
6109 }
6110 }
6111
6112 void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...)
6113 {
6114 char dbf_txt_buf[32];
6115 va_list args;
6116
6117 if (!debug_level_enabled(id, level))
6118 return;
6119 va_start(args, fmt);
6120 vscnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
6121 va_end(args);
6122 debug_text_event(id, level, dbf_txt_buf);
6123 }
6124 EXPORT_SYMBOL_GPL(qeth_dbf_longtext);
6125
6126 static int qeth_register_dbf_views(void)
6127 {
6128 int ret;
6129 int x;
6130
6131 for (x = 0; x < QETH_DBF_INFOS; x++) {
6132 /* register the areas */
6133 qeth_dbf[x].id = debug_register(qeth_dbf[x].name,
6134 qeth_dbf[x].pages,
6135 qeth_dbf[x].areas,
6136 qeth_dbf[x].len);
6137 if (qeth_dbf[x].id == NULL) {
6138 qeth_unregister_dbf_views();
6139 return -ENOMEM;
6140 }
6141
6142 /* register a view */
6143 ret = debug_register_view(qeth_dbf[x].id, qeth_dbf[x].view);
6144 if (ret) {
6145 qeth_unregister_dbf_views();
6146 return ret;
6147 }
6148
6149 /* set a passing level */
6150 debug_set_level(qeth_dbf[x].id, qeth_dbf[x].level);
6151 }
6152
6153 return 0;
6154 }
6155
6156 static DEFINE_MUTEX(qeth_mod_mutex); /* for synchronized module loading */
6157
6158 int qeth_setup_discipline(struct qeth_card *card,
6159 enum qeth_discipline_id discipline)
6160 {
6161 int rc;
6162
6163 mutex_lock(&qeth_mod_mutex);
6164 switch (discipline) {
6165 case QETH_DISCIPLINE_LAYER3:
6166 card->discipline = try_then_request_module(
6167 symbol_get(qeth_l3_discipline), "qeth_l3");
6168 break;
6169 case QETH_DISCIPLINE_LAYER2:
6170 card->discipline = try_then_request_module(
6171 symbol_get(qeth_l2_discipline), "qeth_l2");
6172 break;
6173 default:
6174 break;
6175 }
6176 mutex_unlock(&qeth_mod_mutex);
6177
6178 if (!card->discipline) {
6179 dev_err(&card->gdev->dev, "There is no kernel module to "
6180 "support discipline %d\n", discipline);
6181 return -EINVAL;
6182 }
6183
6184 rc = card->discipline->setup(card->gdev);
6185 if (rc) {
6186 if (discipline == QETH_DISCIPLINE_LAYER2)
6187 symbol_put(qeth_l2_discipline);
6188 else
6189 symbol_put(qeth_l3_discipline);
6190 card->discipline = NULL;
6191
6192 return rc;
6193 }
6194
6195 card->options.layer = discipline;
6196 return 0;
6197 }
6198
6199 void qeth_remove_discipline(struct qeth_card *card)
6200 {
6201 card->discipline->remove(card->gdev);
6202
6203 if (IS_LAYER2(card))
6204 symbol_put(qeth_l2_discipline);
6205 else
6206 symbol_put(qeth_l3_discipline);
6207 card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
6208 card->discipline = NULL;
6209 }
6210
6211 static const struct device_type qeth_generic_devtype = {
6212 .name = "qeth_generic",
6213 };
6214
6215 #define DBF_NAME_LEN 20
6216
6217 struct qeth_dbf_entry {
6218 char dbf_name[DBF_NAME_LEN];
6219 debug_info_t *dbf_info;
6220 struct list_head dbf_list;
6221 };
6222
6223 static LIST_HEAD(qeth_dbf_list);
6224 static DEFINE_MUTEX(qeth_dbf_list_mutex);
6225
6226 static debug_info_t *qeth_get_dbf_entry(char *name)
6227 {
6228 struct qeth_dbf_entry *entry;
6229 debug_info_t *rc = NULL;
6230
6231 mutex_lock(&qeth_dbf_list_mutex);
6232 list_for_each_entry(entry, &qeth_dbf_list, dbf_list) {
6233 if (strcmp(entry->dbf_name, name) == 0) {
6234 rc = entry->dbf_info;
6235 break;
6236 }
6237 }
6238 mutex_unlock(&qeth_dbf_list_mutex);
6239 return rc;
6240 }
6241
6242 static int qeth_add_dbf_entry(struct qeth_card *card, char *name)
6243 {
6244 struct qeth_dbf_entry *new_entry;
6245
6246 card->debug = debug_register(name, 2, 1, 8);
6247 if (!card->debug) {
6248 QETH_DBF_TEXT_(SETUP, 2, "%s", "qcdbf");
6249 goto err;
6250 }
6251 if (debug_register_view(card->debug, &debug_hex_ascii_view))
6252 goto err_dbg;
6253 new_entry = kzalloc(sizeof(struct qeth_dbf_entry), GFP_KERNEL);
6254 if (!new_entry)
6255 goto err_dbg;
6256 strscpy(new_entry->dbf_name, name, sizeof(new_entry->dbf_name));
6257 new_entry->dbf_info = card->debug;
6258 mutex_lock(&qeth_dbf_list_mutex);
6259 list_add(&new_entry->dbf_list, &qeth_dbf_list);
6260 mutex_unlock(&qeth_dbf_list_mutex);
6261
6262 return 0;
6263
6264 err_dbg:
6265 debug_unregister(card->debug);
6266 err:
6267 return -ENOMEM;
6268 }
6269
6270 static void qeth_clear_dbf_list(void)
6271 {
6272 struct qeth_dbf_entry *entry, *tmp;
6273
6274 mutex_lock(&qeth_dbf_list_mutex);
6275 list_for_each_entry_safe(entry, tmp, &qeth_dbf_list, dbf_list) {
6276 list_del(&entry->dbf_list);
6277 debug_unregister(entry->dbf_info);
6278 kfree(entry);
6279 }
6280 mutex_unlock(&qeth_dbf_list_mutex);
6281 }
6282
6283 static struct net_device *qeth_alloc_netdev(struct qeth_card *card)
6284 {
6285 struct net_device *dev;
6286 struct qeth_priv *priv;
6287
6288 switch (card->info.type) {
6289 case QETH_CARD_TYPE_IQD:
6290 dev = alloc_netdev_mqs(sizeof(*priv), "hsi%d", NET_NAME_UNKNOWN,
6291 ether_setup, QETH_MAX_OUT_QUEUES, 1);
6292 break;
6293 case QETH_CARD_TYPE_OSM:
6294 dev = alloc_etherdev(sizeof(*priv));
6295 break;
6296 default:
6297 dev = alloc_etherdev_mqs(sizeof(*priv), QETH_MAX_OUT_QUEUES, 1);
6298 }
6299
6300 if (!dev)
6301 return NULL;
6302
6303 priv = netdev_priv(dev);
6304 priv->rx_copybreak = QETH_RX_COPYBREAK;
6305 priv->tx_wanted_queues = IS_IQD(card) ? QETH_IQD_MIN_TXQ : 1;
6306
6307 dev->ml_priv = card;
6308 dev->watchdog_timeo = QETH_TX_TIMEOUT;
6309 dev->min_mtu = 576;
6310 /* initialized when device first goes online: */
6311 dev->max_mtu = 0;
6312 dev->mtu = 0;
6313 SET_NETDEV_DEV(dev, &card->gdev->dev);
6314 netif_carrier_off(dev);
6315
6316 dev->ethtool_ops = &qeth_ethtool_ops;
6317 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
6318 dev->hw_features |= NETIF_F_SG;
6319 dev->vlan_features |= NETIF_F_SG;
6320 if (IS_IQD(card))
6321 dev->features |= NETIF_F_SG;
6322
6323 return dev;
6324 }
6325
6326 struct net_device *qeth_clone_netdev(struct net_device *orig)
6327 {
6328 struct net_device *clone = qeth_alloc_netdev(orig->ml_priv);
6329
6330 if (!clone)
6331 return NULL;
6332
6333 clone->dev_port = orig->dev_port;
6334 return clone;
6335 }
6336
6337 static int qeth_core_probe_device(struct ccwgroup_device *gdev)
6338 {
6339 struct qeth_card *card;
6340 struct device *dev;
6341 int rc;
6342 enum qeth_discipline_id enforced_disc;
6343 char dbf_name[DBF_NAME_LEN];
6344
6345 QETH_DBF_TEXT(SETUP, 2, "probedev");
6346
6347 dev = &gdev->dev;
6348 if (!get_device(dev))
6349 return -ENODEV;
6350
6351 QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev));
6352
6353 card = qeth_alloc_card(gdev);
6354 if (!card) {
6355 QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM);
6356 rc = -ENOMEM;
6357 goto err_dev;
6358 }
6359
6360 scnprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
6361 dev_name(&gdev->dev));
6362 card->debug = qeth_get_dbf_entry(dbf_name);
6363 if (!card->debug) {
6364 rc = qeth_add_dbf_entry(card, dbf_name);
6365 if (rc)
6366 goto err_card;
6367 }
6368
6369 qeth_setup_card(card);
6370 card->dev = qeth_alloc_netdev(card);
6371 if (!card->dev) {
6372 rc = -ENOMEM;
6373 goto err_card;
6374 }
6375
6376 qeth_determine_capabilities(card);
6377 qeth_set_blkt_defaults(card);
6378
6379 card->qdio.in_q = qeth_alloc_qdio_queue();
6380 if (!card->qdio.in_q) {
6381 rc = -ENOMEM;
6382 goto err_rx_queue;
6383 }
6384
6385 card->qdio.no_out_queues = card->dev->num_tx_queues;
6386 rc = qeth_update_from_chp_desc(card);
6387 if (rc)
6388 goto err_chp_desc;
6389
6390 gdev->dev.groups = qeth_dev_groups;
6391
6392 enforced_disc = qeth_enforce_discipline(card);
6393 switch (enforced_disc) {
6394 case QETH_DISCIPLINE_UNDETERMINED:
6395 gdev->dev.type = &qeth_generic_devtype;
6396 break;
6397 default:
6398 card->info.layer_enforced = true;
6399 /* It's so early that we don't need the discipline_mutex yet. */
6400 rc = qeth_setup_discipline(card, enforced_disc);
6401 if (rc)
6402 goto err_setup_disc;
6403
6404 break;
6405 }
6406
6407 return 0;
6408
6409 err_setup_disc:
6410 err_chp_desc:
6411 qeth_free_qdio_queue(card->qdio.in_q);
6412 err_rx_queue:
6413 free_netdev(card->dev);
6414 err_card:
6415 qeth_core_free_card(card);
6416 err_dev:
6417 put_device(dev);
6418 return rc;
6419 }
6420
6421 static void qeth_core_remove_device(struct ccwgroup_device *gdev)
6422 {
6423 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6424
6425 QETH_CARD_TEXT(card, 2, "removedv");
6426
6427 mutex_lock(&card->discipline_mutex);
6428 if (card->discipline)
6429 qeth_remove_discipline(card);
6430 mutex_unlock(&card->discipline_mutex);
6431
6432 qeth_free_qdio_queues(card);
6433
6434 qeth_free_qdio_queue(card->qdio.in_q);
6435 free_netdev(card->dev);
6436 qeth_core_free_card(card);
6437 put_device(&gdev->dev);
6438 }
6439
6440 static int qeth_core_set_online(struct ccwgroup_device *gdev)
6441 {
6442 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6443 int rc = 0;
6444 enum qeth_discipline_id def_discipline;
6445
6446 mutex_lock(&card->discipline_mutex);
6447 if (!card->discipline) {
6448 def_discipline = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
6449 QETH_DISCIPLINE_LAYER2;
6450 rc = qeth_setup_discipline(card, def_discipline);
6451 if (rc)
6452 goto err;
6453 }
6454
6455 rc = qeth_set_online(card, card->discipline);
6456
6457 err:
6458 mutex_unlock(&card->discipline_mutex);
6459 return rc;
6460 }
6461
6462 static int qeth_core_set_offline(struct ccwgroup_device *gdev)
6463 {
6464 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6465 int rc;
6466
6467 mutex_lock(&card->discipline_mutex);
6468 rc = qeth_set_offline(card, card->discipline, false);
6469 mutex_unlock(&card->discipline_mutex);
6470
6471 return rc;
6472 }
6473
6474 static void qeth_core_shutdown(struct ccwgroup_device *gdev)
6475 {
6476 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6477
6478 qeth_set_allowed_threads(card, 0, 1);
6479 if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
6480 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
6481 qeth_qdio_clear_card(card, 0);
6482 qeth_drain_output_queues(card);
6483 qdio_free(CARD_DDEV(card));
6484 }
6485
6486 static ssize_t group_store(struct device_driver *ddrv, const char *buf,
6487 size_t count)
6488 {
6489 int err;
6490
6491 err = ccwgroup_create_dev(qeth_core_root_dev, to_ccwgroupdrv(ddrv), 3,
6492 buf);
6493
6494 return err ? err : count;
6495 }
6496 static DRIVER_ATTR_WO(group);
6497
6498 static struct attribute *qeth_drv_attrs[] = {
6499 &driver_attr_group.attr,
6500 NULL,
6501 };
6502 static struct attribute_group qeth_drv_attr_group = {
6503 .attrs = qeth_drv_attrs,
6504 };
6505 static const struct attribute_group *qeth_drv_attr_groups[] = {
6506 &qeth_drv_attr_group,
6507 NULL,
6508 };
6509
6510 static struct ccwgroup_driver qeth_core_ccwgroup_driver = {
6511 .driver = {
6512 .groups = qeth_drv_attr_groups,
6513 .owner = THIS_MODULE,
6514 .name = "qeth",
6515 },
6516 .ccw_driver = &qeth_ccw_driver,
6517 .setup = qeth_core_probe_device,
6518 .remove = qeth_core_remove_device,
6519 .set_online = qeth_core_set_online,
6520 .set_offline = qeth_core_set_offline,
6521 .shutdown = qeth_core_shutdown,
6522 };
6523
6524 int qeth_siocdevprivate(struct net_device *dev, struct ifreq *rq, void __user *data, int cmd)
6525 {
6526 struct qeth_card *card = dev->ml_priv;
6527 int rc = 0;
6528
6529 switch (cmd) {
6530 case SIOC_QETH_ADP_SET_SNMP_CONTROL:
6531 rc = qeth_snmp_command(card, data);
6532 break;
6533 case SIOC_QETH_GET_CARD_TYPE:
6534 if ((IS_OSD(card) || IS_OSM(card) || IS_OSX(card)) &&
6535 !IS_VM_NIC(card))
6536 return 1;
6537 return 0;
6538 case SIOC_QETH_QUERY_OAT:
6539 rc = qeth_query_oat_command(card, data);
6540 break;
6541 default:
6542 rc = -EOPNOTSUPP;
6543 }
6544 if (rc)
6545 QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
6546 return rc;
6547 }
6548 EXPORT_SYMBOL_GPL(qeth_siocdevprivate);
6549
6550 int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
6551 {
6552 struct qeth_card *card = dev->ml_priv;
6553 struct mii_ioctl_data *mii_data;
6554 int rc = 0;
6555
6556 switch (cmd) {
6557 case SIOCGMIIPHY:
6558 mii_data = if_mii(rq);
6559 mii_data->phy_id = 0;
6560 break;
6561 case SIOCGMIIREG:
6562 mii_data = if_mii(rq);
6563 if (mii_data->phy_id != 0)
6564 rc = -EINVAL;
6565 else
6566 mii_data->val_out = qeth_mdio_read(dev,
6567 mii_data->phy_id, mii_data->reg_num);
6568 break;
6569 default:
6570 return -EOPNOTSUPP;
6571 }
6572 if (rc)
6573 QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
6574 return rc;
6575 }
6576 EXPORT_SYMBOL_GPL(qeth_do_ioctl);
6577
6578 static int qeth_start_csum_cb(struct qeth_card *card, struct qeth_reply *reply,
6579 unsigned long data)
6580 {
6581 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6582 u32 *features = reply->param;
6583
6584 if (qeth_setassparms_inspect_rc(cmd))
6585 return -EIO;
6586
6587 *features = cmd->data.setassparms.data.flags_32bit;
6588 return 0;
6589 }
6590
6591 static int qeth_set_csum_off(struct qeth_card *card, enum qeth_ipa_funcs cstype,
6592 enum qeth_prot_versions prot)
6593 {
6594 return qeth_send_simple_setassparms_prot(card, cstype, IPA_CMD_ASS_STOP,
6595 NULL, prot);
6596 }
6597
6598 static int qeth_set_csum_on(struct qeth_card *card, enum qeth_ipa_funcs cstype,
6599 enum qeth_prot_versions prot, u8 *lp2lp)
6600 {
6601 u32 required_features = QETH_IPA_CHECKSUM_UDP | QETH_IPA_CHECKSUM_TCP;
6602 struct qeth_cmd_buffer *iob;
6603 struct qeth_ipa_caps caps;
6604 u32 features;
6605 int rc;
6606
6607 /* some L3 HW requires combined L3+L4 csum offload: */
6608 if (IS_LAYER3(card) && prot == QETH_PROT_IPV4 &&
6609 cstype == IPA_OUTBOUND_CHECKSUM)
6610 required_features |= QETH_IPA_CHECKSUM_IP_HDR;
6611
6612 iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_START, 0,
6613 prot);
6614 if (!iob)
6615 return -ENOMEM;
6616
6617 rc = qeth_send_ipa_cmd(card, iob, qeth_start_csum_cb, &features);
6618 if (rc)
6619 return rc;
6620
6621 if ((required_features & features) != required_features) {
6622 qeth_set_csum_off(card, cstype, prot);
6623 return -EOPNOTSUPP;
6624 }
6625
6626 iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_ENABLE,
6627 SETASS_DATA_SIZEOF(flags_32bit),
6628 prot);
6629 if (!iob) {
6630 qeth_set_csum_off(card, cstype, prot);
6631 return -ENOMEM;
6632 }
6633
6634 if (features & QETH_IPA_CHECKSUM_LP2LP)
6635 required_features |= QETH_IPA_CHECKSUM_LP2LP;
6636 __ipa_cmd(iob)->data.setassparms.data.flags_32bit = required_features;
6637 rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6638 if (rc) {
6639 qeth_set_csum_off(card, cstype, prot);
6640 return rc;
6641 }
6642
6643 if (!qeth_ipa_caps_supported(&caps, required_features) ||
6644 !qeth_ipa_caps_enabled(&caps, required_features)) {
6645 qeth_set_csum_off(card, cstype, prot);
6646 return -EOPNOTSUPP;
6647 }
6648
6649 dev_info(&card->gdev->dev, "HW Checksumming (%sbound IPv%d) enabled\n",
6650 cstype == IPA_INBOUND_CHECKSUM ? "in" : "out", prot);
6651
6652 if (lp2lp)
6653 *lp2lp = qeth_ipa_caps_enabled(&caps, QETH_IPA_CHECKSUM_LP2LP);
6654
6655 return 0;
6656 }
6657
6658 static int qeth_set_ipa_csum(struct qeth_card *card, bool on, int cstype,
6659 enum qeth_prot_versions prot, u8 *lp2lp)
6660 {
6661 return on ? qeth_set_csum_on(card, cstype, prot, lp2lp) :
6662 qeth_set_csum_off(card, cstype, prot);
6663 }
6664
6665 static int qeth_start_tso_cb(struct qeth_card *card, struct qeth_reply *reply,
6666 unsigned long data)
6667 {
6668 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6669 struct qeth_tso_start_data *tso_data = reply->param;
6670
6671 if (qeth_setassparms_inspect_rc(cmd))
6672 return -EIO;
6673
6674 tso_data->mss = cmd->data.setassparms.data.tso.mss;
6675 tso_data->supported = cmd->data.setassparms.data.tso.supported;
6676 return 0;
6677 }
6678
6679 static int qeth_set_tso_off(struct qeth_card *card,
6680 enum qeth_prot_versions prot)
6681 {
6682 return qeth_send_simple_setassparms_prot(card, IPA_OUTBOUND_TSO,
6683 IPA_CMD_ASS_STOP, NULL, prot);
6684 }
6685
6686 static int qeth_set_tso_on(struct qeth_card *card,
6687 enum qeth_prot_versions prot)
6688 {
6689 struct qeth_tso_start_data tso_data;
6690 struct qeth_cmd_buffer *iob;
6691 struct qeth_ipa_caps caps;
6692 int rc;
6693
6694 iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6695 IPA_CMD_ASS_START, 0, prot);
6696 if (!iob)
6697 return -ENOMEM;
6698
6699 rc = qeth_send_ipa_cmd(card, iob, qeth_start_tso_cb, &tso_data);
6700 if (rc)
6701 return rc;
6702
6703 if (!tso_data.mss || !(tso_data.supported & QETH_IPA_LARGE_SEND_TCP)) {
6704 qeth_set_tso_off(card, prot);
6705 return -EOPNOTSUPP;
6706 }
6707
6708 iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6709 IPA_CMD_ASS_ENABLE,
6710 SETASS_DATA_SIZEOF(caps), prot);
6711 if (!iob) {
6712 qeth_set_tso_off(card, prot);
6713 return -ENOMEM;
6714 }
6715
6716 /* enable TSO capability */
6717 __ipa_cmd(iob)->data.setassparms.data.caps.enabled =
6718 QETH_IPA_LARGE_SEND_TCP;
6719 rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6720 if (rc) {
6721 qeth_set_tso_off(card, prot);
6722 return rc;
6723 }
6724
6725 if (!qeth_ipa_caps_supported(&caps, QETH_IPA_LARGE_SEND_TCP) ||
6726 !qeth_ipa_caps_enabled(&caps, QETH_IPA_LARGE_SEND_TCP)) {
6727 qeth_set_tso_off(card, prot);
6728 return -EOPNOTSUPP;
6729 }
6730
6731 dev_info(&card->gdev->dev, "TSOv%u enabled (MSS: %u)\n", prot,
6732 tso_data.mss);
6733 return 0;
6734 }
6735
6736 static int qeth_set_ipa_tso(struct qeth_card *card, bool on,
6737 enum qeth_prot_versions prot)
6738 {
6739 return on ? qeth_set_tso_on(card, prot) : qeth_set_tso_off(card, prot);
6740 }
6741
6742 static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on)
6743 {
6744 int rc_ipv4 = (on) ? -EOPNOTSUPP : 0;
6745 int rc_ipv6;
6746
6747 if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
6748 rc_ipv4 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6749 QETH_PROT_IPV4, NULL);
6750 if (!qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6751 /* no/one Offload Assist available, so the rc is trivial */
6752 return rc_ipv4;
6753
6754 rc_ipv6 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6755 QETH_PROT_IPV6, NULL);
6756
6757 if (on)
6758 /* enable: success if any Assist is active */
6759 return (rc_ipv6) ? rc_ipv4 : 0;
6760
6761 /* disable: failure if any Assist is still active */
6762 return (rc_ipv6) ? rc_ipv6 : rc_ipv4;
6763 }
6764
6765 /**
6766 * qeth_enable_hw_features() - (Re-)Enable HW functions for device features
6767 * @dev: a net_device
6768 */
6769 void qeth_enable_hw_features(struct net_device *dev)
6770 {
6771 struct qeth_card *card = dev->ml_priv;
6772 netdev_features_t features;
6773
6774 features = dev->features;
6775 /* force-off any feature that might need an IPA sequence.
6776 * netdev_update_features() will restart them.
6777 */
6778 dev->features &= ~dev->hw_features;
6779 /* toggle VLAN filter, so that VIDs are re-programmed: */
6780 if (IS_LAYER2(card) && IS_VM_NIC(card)) {
6781 dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
6782 dev->wanted_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
6783 }
6784 netdev_update_features(dev);
6785 if (features != dev->features)
6786 dev_warn(&card->gdev->dev,
6787 "Device recovery failed to restore all offload features\n");
6788 }
6789 EXPORT_SYMBOL_GPL(qeth_enable_hw_features);
6790
6791 static void qeth_check_restricted_features(struct qeth_card *card,
6792 netdev_features_t changed,
6793 netdev_features_t actual)
6794 {
6795 netdev_features_t ipv6_features = NETIF_F_TSO6;
6796 netdev_features_t ipv4_features = NETIF_F_TSO;
6797
6798 if (!card->info.has_lp2lp_cso_v6)
6799 ipv6_features |= NETIF_F_IPV6_CSUM;
6800 if (!card->info.has_lp2lp_cso_v4)
6801 ipv4_features |= NETIF_F_IP_CSUM;
6802
6803 if ((changed & ipv6_features) && !(actual & ipv6_features))
6804 qeth_flush_local_addrs6(card);
6805 if ((changed & ipv4_features) && !(actual & ipv4_features))
6806 qeth_flush_local_addrs4(card);
6807 }
6808
6809 int qeth_set_features(struct net_device *dev, netdev_features_t features)
6810 {
6811 struct qeth_card *card = dev->ml_priv;
6812 netdev_features_t changed = dev->features ^ features;
6813 int rc = 0;
6814
6815 QETH_CARD_TEXT(card, 2, "setfeat");
6816 QETH_CARD_HEX(card, 2, &features, sizeof(features));
6817
6818 if ((changed & NETIF_F_IP_CSUM)) {
6819 rc = qeth_set_ipa_csum(card, features & NETIF_F_IP_CSUM,
6820 IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV4,
6821 &card->info.has_lp2lp_cso_v4);
6822 if (rc)
6823 changed ^= NETIF_F_IP_CSUM;
6824 }
6825 if (changed & NETIF_F_IPV6_CSUM) {
6826 rc = qeth_set_ipa_csum(card, features & NETIF_F_IPV6_CSUM,
6827 IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV6,
6828 &card->info.has_lp2lp_cso_v6);
6829 if (rc)
6830 changed ^= NETIF_F_IPV6_CSUM;
6831 }
6832 if (changed & NETIF_F_RXCSUM) {
6833 rc = qeth_set_ipa_rx_csum(card, features & NETIF_F_RXCSUM);
6834 if (rc)
6835 changed ^= NETIF_F_RXCSUM;
6836 }
6837 if (changed & NETIF_F_TSO) {
6838 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO,
6839 QETH_PROT_IPV4);
6840 if (rc)
6841 changed ^= NETIF_F_TSO;
6842 }
6843 if (changed & NETIF_F_TSO6) {
6844 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO6,
6845 QETH_PROT_IPV6);
6846 if (rc)
6847 changed ^= NETIF_F_TSO6;
6848 }
6849
6850 qeth_check_restricted_features(card, dev->features ^ features,
6851 dev->features ^ changed);
6852
6853 /* everything changed successfully? */
6854 if ((dev->features ^ features) == changed)
6855 return 0;
6856 /* something went wrong. save changed features and return error */
6857 dev->features ^= changed;
6858 return -EIO;
6859 }
6860 EXPORT_SYMBOL_GPL(qeth_set_features);
6861
6862 netdev_features_t qeth_fix_features(struct net_device *dev,
6863 netdev_features_t features)
6864 {
6865 struct qeth_card *card = dev->ml_priv;
6866
6867 QETH_CARD_TEXT(card, 2, "fixfeat");
6868 if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
6869 features &= ~NETIF_F_IP_CSUM;
6870 if (!qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6))
6871 features &= ~NETIF_F_IPV6_CSUM;
6872 if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM) &&
6873 !qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6874 features &= ~NETIF_F_RXCSUM;
6875 if (!qeth_is_supported(card, IPA_OUTBOUND_TSO))
6876 features &= ~NETIF_F_TSO;
6877 if (!qeth_is_supported6(card, IPA_OUTBOUND_TSO))
6878 features &= ~NETIF_F_TSO6;
6879
6880 QETH_CARD_HEX(card, 2, &features, sizeof(features));
6881 return features;
6882 }
6883 EXPORT_SYMBOL_GPL(qeth_fix_features);
6884
6885 netdev_features_t qeth_features_check(struct sk_buff *skb,
6886 struct net_device *dev,
6887 netdev_features_t features)
6888 {
6889 struct qeth_card *card = dev->ml_priv;
6890
6891 /* Traffic with local next-hop is not eligible for some offloads: */
6892 if (skb->ip_summed == CHECKSUM_PARTIAL &&
6893 READ_ONCE(card->options.isolation) != ISOLATION_MODE_FWD) {
6894 netdev_features_t restricted = 0;
6895
6896 if (skb_is_gso(skb) && !netif_needs_gso(skb, features))
6897 restricted |= NETIF_F_ALL_TSO;
6898
6899 switch (vlan_get_protocol(skb)) {
6900 case htons(ETH_P_IP):
6901 if (!card->info.has_lp2lp_cso_v4)
6902 restricted |= NETIF_F_IP_CSUM;
6903
6904 if (restricted && qeth_next_hop_is_local_v4(card, skb))
6905 features &= ~restricted;
6906 break;
6907 case htons(ETH_P_IPV6):
6908 if (!card->info.has_lp2lp_cso_v6)
6909 restricted |= NETIF_F_IPV6_CSUM;
6910
6911 if (restricted && qeth_next_hop_is_local_v6(card, skb))
6912 features &= ~restricted;
6913 break;
6914 default:
6915 break;
6916 }
6917 }
6918
6919 /* GSO segmentation builds skbs with
6920 * a (small) linear part for the headers, and
6921 * page frags for the data.
6922 * Compared to a linear skb, the header-only part consumes an
6923 * additional buffer element. This reduces buffer utilization, and
6924 * hurts throughput. So compress small segments into one element.
6925 */
6926 if (netif_needs_gso(skb, features)) {
6927 /* match skb_segment(): */
6928 unsigned int doffset = skb->data - skb_mac_header(skb);
6929 unsigned int hsize = skb_shinfo(skb)->gso_size;
6930 unsigned int hroom = skb_headroom(skb);
6931
6932 /* linearize only if resulting skb allocations are order-0: */
6933 if (SKB_DATA_ALIGN(hroom + doffset + hsize) <= SKB_MAX_HEAD(0))
6934 features &= ~NETIF_F_SG;
6935 }
6936
6937 return vlan_features_check(skb, features);
6938 }
6939 EXPORT_SYMBOL_GPL(qeth_features_check);
6940
6941 void qeth_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
6942 {
6943 struct qeth_card *card = dev->ml_priv;
6944 struct qeth_qdio_out_q *queue;
6945 unsigned int i;
6946
6947 QETH_CARD_TEXT(card, 5, "getstat");
6948
6949 stats->rx_packets = card->stats.rx_packets;
6950 stats->rx_bytes = card->stats.rx_bytes;
6951 stats->rx_errors = card->stats.rx_length_errors +
6952 card->stats.rx_frame_errors +
6953 card->stats.rx_fifo_errors;
6954 stats->rx_dropped = card->stats.rx_dropped_nomem +
6955 card->stats.rx_dropped_notsupp +
6956 card->stats.rx_dropped_runt;
6957 stats->multicast = card->stats.rx_multicast;
6958 stats->rx_length_errors = card->stats.rx_length_errors;
6959 stats->rx_frame_errors = card->stats.rx_frame_errors;
6960 stats->rx_fifo_errors = card->stats.rx_fifo_errors;
6961
6962 for (i = 0; i < card->qdio.no_out_queues; i++) {
6963 queue = card->qdio.out_qs[i];
6964
6965 stats->tx_packets += queue->stats.tx_packets;
6966 stats->tx_bytes += queue->stats.tx_bytes;
6967 stats->tx_errors += queue->stats.tx_errors;
6968 stats->tx_dropped += queue->stats.tx_dropped;
6969 }
6970 }
6971 EXPORT_SYMBOL_GPL(qeth_get_stats64);
6972
6973 #define TC_IQD_UCAST 0
6974 static void qeth_iqd_set_prio_tc_map(struct net_device *dev,
6975 unsigned int ucast_txqs)
6976 {
6977 unsigned int prio;
6978
6979 /* IQD requires mcast traffic to be placed on a dedicated queue, and
6980 * qeth_iqd_select_queue() deals with this.
6981 * For unicast traffic, we defer the queue selection to the stack.
6982 * By installing a trivial prio map that spans over only the unicast
6983 * queues, we can encourage the stack to spread the ucast traffic evenly
6984 * without selecting the mcast queue.
6985 */
6986
6987 /* One traffic class, spanning over all active ucast queues: */
6988 netdev_set_num_tc(dev, 1);
6989 netdev_set_tc_queue(dev, TC_IQD_UCAST, ucast_txqs,
6990 QETH_IQD_MIN_UCAST_TXQ);
6991
6992 /* Map all priorities to this traffic class: */
6993 for (prio = 0; prio <= TC_BITMASK; prio++)
6994 netdev_set_prio_tc_map(dev, prio, TC_IQD_UCAST);
6995 }
6996
6997 int qeth_set_real_num_tx_queues(struct qeth_card *card, unsigned int count)
6998 {
6999 struct net_device *dev = card->dev;
7000 int rc;
7001
7002 /* Per netif_setup_tc(), adjust the mapping first: */
7003 if (IS_IQD(card))
7004 qeth_iqd_set_prio_tc_map(dev, count - 1);
7005
7006 rc = netif_set_real_num_tx_queues(dev, count);
7007
7008 if (rc && IS_IQD(card))
7009 qeth_iqd_set_prio_tc_map(dev, dev->real_num_tx_queues - 1);
7010
7011 return rc;
7012 }
7013 EXPORT_SYMBOL_GPL(qeth_set_real_num_tx_queues);
7014
7015 u16 qeth_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
7016 u8 cast_type, struct net_device *sb_dev)
7017 {
7018 u16 txq;
7019
7020 if (cast_type != RTN_UNICAST)
7021 return QETH_IQD_MCAST_TXQ;
7022 if (dev->real_num_tx_queues == QETH_IQD_MIN_TXQ)
7023 return QETH_IQD_MIN_UCAST_TXQ;
7024
7025 txq = netdev_pick_tx(dev, skb, sb_dev);
7026 return (txq == QETH_IQD_MCAST_TXQ) ? QETH_IQD_MIN_UCAST_TXQ : txq;
7027 }
7028 EXPORT_SYMBOL_GPL(qeth_iqd_select_queue);
7029
7030 u16 qeth_osa_select_queue(struct net_device *dev, struct sk_buff *skb,
7031 struct net_device *sb_dev)
7032 {
7033 struct qeth_card *card = dev->ml_priv;
7034
7035 if (qeth_uses_tx_prio_queueing(card))
7036 return qeth_get_priority_queue(card, skb);
7037
7038 return netdev_pick_tx(dev, skb, sb_dev);
7039 }
7040 EXPORT_SYMBOL_GPL(qeth_osa_select_queue);
7041
7042 int qeth_open(struct net_device *dev)
7043 {
7044 struct qeth_card *card = dev->ml_priv;
7045 struct qeth_qdio_out_q *queue;
7046 unsigned int i;
7047
7048 QETH_CARD_TEXT(card, 4, "qethopen");
7049
7050 card->data.state = CH_STATE_UP;
7051 netif_tx_start_all_queues(dev);
7052
7053 local_bh_disable();
7054 qeth_for_each_output_queue(card, queue, i) {
7055 netif_napi_add_tx(dev, &queue->napi, qeth_tx_poll);
7056 napi_enable(&queue->napi);
7057 napi_schedule(&queue->napi);
7058 }
7059
7060 napi_enable(&card->napi);
7061 napi_schedule(&card->napi);
7062 /* kick-start the NAPI softirq: */
7063 local_bh_enable();
7064
7065 return 0;
7066 }
7067 EXPORT_SYMBOL_GPL(qeth_open);
7068
7069 int qeth_stop(struct net_device *dev)
7070 {
7071 struct qeth_card *card = dev->ml_priv;
7072 struct qeth_qdio_out_q *queue;
7073 unsigned int i;
7074
7075 QETH_CARD_TEXT(card, 4, "qethstop");
7076
7077 napi_disable(&card->napi);
7078 cancel_delayed_work_sync(&card->buffer_reclaim_work);
7079 qdio_stop_irq(CARD_DDEV(card));
7080
7081 /* Quiesce the NAPI instances: */
7082 qeth_for_each_output_queue(card, queue, i)
7083 napi_disable(&queue->napi);
7084
7085 /* Stop .ndo_start_xmit, might still access queue->napi. */
7086 netif_tx_disable(dev);
7087
7088 qeth_for_each_output_queue(card, queue, i) {
7089 del_timer_sync(&queue->timer);
7090 /* Queues may get re-allocated, so remove the NAPIs. */
7091 netif_napi_del(&queue->napi);
7092 }
7093
7094 return 0;
7095 }
7096 EXPORT_SYMBOL_GPL(qeth_stop);
7097
7098 static int __init qeth_core_init(void)
7099 {
7100 int rc;
7101
7102 pr_info("loading core functions\n");
7103
7104 qeth_debugfs_root = debugfs_create_dir("qeth", NULL);
7105
7106 rc = qeth_register_dbf_views();
7107 if (rc)
7108 goto dbf_err;
7109 qeth_core_root_dev = root_device_register("qeth");
7110 rc = PTR_ERR_OR_ZERO(qeth_core_root_dev);
7111 if (rc)
7112 goto register_err;
7113 qeth_core_header_cache =
7114 kmem_cache_create("qeth_hdr", QETH_HDR_CACHE_OBJ_SIZE,
7115 roundup_pow_of_two(QETH_HDR_CACHE_OBJ_SIZE),
7116 0, NULL);
7117 if (!qeth_core_header_cache) {
7118 rc = -ENOMEM;
7119 goto slab_err;
7120 }
7121 qeth_qdio_outbuf_cache = kmem_cache_create("qeth_buf",
7122 sizeof(struct qeth_qdio_out_buffer), 0, 0, NULL);
7123 if (!qeth_qdio_outbuf_cache) {
7124 rc = -ENOMEM;
7125 goto cqslab_err;
7126 }
7127
7128 qeth_qaob_cache = kmem_cache_create("qeth_qaob",
7129 sizeof(struct qaob),
7130 sizeof(struct qaob),
7131 0, NULL);
7132 if (!qeth_qaob_cache) {
7133 rc = -ENOMEM;
7134 goto qaob_err;
7135 }
7136
7137 rc = ccw_driver_register(&qeth_ccw_driver);
7138 if (rc)
7139 goto ccw_err;
7140 rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver);
7141 if (rc)
7142 goto ccwgroup_err;
7143
7144 return 0;
7145
7146 ccwgroup_err:
7147 ccw_driver_unregister(&qeth_ccw_driver);
7148 ccw_err:
7149 kmem_cache_destroy(qeth_qaob_cache);
7150 qaob_err:
7151 kmem_cache_destroy(qeth_qdio_outbuf_cache);
7152 cqslab_err:
7153 kmem_cache_destroy(qeth_core_header_cache);
7154 slab_err:
7155 root_device_unregister(qeth_core_root_dev);
7156 register_err:
7157 qeth_unregister_dbf_views();
7158 dbf_err:
7159 debugfs_remove_recursive(qeth_debugfs_root);
7160 pr_err("Initializing the qeth device driver failed\n");
7161 return rc;
7162 }
7163
7164 static void __exit qeth_core_exit(void)
7165 {
7166 qeth_clear_dbf_list();
7167 ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver);
7168 ccw_driver_unregister(&qeth_ccw_driver);
7169 kmem_cache_destroy(qeth_qaob_cache);
7170 kmem_cache_destroy(qeth_qdio_outbuf_cache);
7171 kmem_cache_destroy(qeth_core_header_cache);
7172 root_device_unregister(qeth_core_root_dev);
7173 qeth_unregister_dbf_views();
7174 debugfs_remove_recursive(qeth_debugfs_root);
7175 pr_info("core functions removed\n");
7176 }
7177
7178 module_init(qeth_core_init);
7179 module_exit(qeth_core_exit);
7180 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
7181 MODULE_DESCRIPTION("qeth core functions");
7182 MODULE_LICENSE("GPL");
Kernel DRM miscellaneous fixes and cross-tree changes