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