1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright IBM Corp. 2007, 2009
4 * Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
5 * Frank Pavlic <fpavlic@de.ibm.com>,
6 * Thomas Spatzier <tspat@de.ibm.com>,
7 * Frank Blaschka <frank.blaschka@de.ibm.com>
8 */
9
10 #define KMSG_COMPONENT "qeth"
11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
12
13 #include <linux/compat.h>
14 #include <linux/module.h>
15 #include <linux/moduleparam.h>
16 #include <linux/string.h>
17 #include <linux/errno.h>
18 #include <linux/kernel.h>
19 #include <linux/log2.h>
20 #include <linux/io.h>
21 #include <linux/ip.h>
22 #include <linux/tcp.h>
23 #include <linux/mii.h>
24 #include <linux/mm.h>
25 #include <linux/kthread.h>
26 #include <linux/slab.h>
27 #include <linux/if_vlan.h>
28 #include <linux/netdevice.h>
29 #include <linux/netdev_features.h>
30 #include <linux/rcutree.h>
31 #include <linux/skbuff.h>
32 #include <linux/vmalloc.h>
33
34 #include <net/iucv/af_iucv.h>
35 #include <net/dsfield.h>
36 #include <net/sock.h>
37
38 #include <asm/ebcdic.h>
39 #include <asm/chpid.h>
40 #include <asm/sysinfo.h>
41 #include <asm/diag.h>
42 #include <asm/cio.h>
43 #include <asm/ccwdev.h>
44 #include <asm/cpcmd.h>
45
46 #include "qeth_core.h"
47
48 struct qeth_dbf_info qeth_dbf[QETH_DBF_INFOS] = {
49 /* define dbf - Name, Pages, Areas, Maxlen, Level, View, Handle */
50 /* N P A M L V H */
51 [QETH_DBF_SETUP] = {"qeth_setup",
52 8, 1, 8, 5, &debug_hex_ascii_view, NULL},
53 [QETH_DBF_MSG] = {"qeth_msg", 8, 1, 11 * sizeof(long), 3,
54 &debug_sprintf_view, NULL},
55 [QETH_DBF_CTRL] = {"qeth_control",
56 8, 1, QETH_DBF_CTRL_LEN, 5, &debug_hex_ascii_view, NULL},
57 };
58 EXPORT_SYMBOL_GPL(qeth_dbf);
59
60 static struct kmem_cache *qeth_core_header_cache;
61 static struct kmem_cache *qeth_qdio_outbuf_cache;
62 static struct kmem_cache *qeth_qaob_cache;
63
64 static struct device *qeth_core_root_dev;
65 static struct dentry *qeth_debugfs_root;
66 static struct lock_class_key qdio_out_skb_queue_key;
67
68 static void qeth_issue_next_read_cb(struct qeth_card *card,
69 struct qeth_cmd_buffer *iob,
70 unsigned int data_length);
71 static int qeth_qdio_establish(struct qeth_card *);
72 static void qeth_free_qdio_queues(struct qeth_card *card);
73
qeth_get_cardname(struct qeth_card * card)74 static const char *qeth_get_cardname(struct qeth_card *card)
75 {
76 if (IS_VM_NIC(card)) {
77 switch (card->info.type) {
78 case QETH_CARD_TYPE_OSD:
79 return " Virtual NIC QDIO";
80 case QETH_CARD_TYPE_IQD:
81 return " Virtual NIC Hiper";
82 case QETH_CARD_TYPE_OSM:
83 return " Virtual NIC QDIO - OSM";
84 case QETH_CARD_TYPE_OSX:
85 return " Virtual NIC QDIO - OSX";
86 default:
87 return " unknown";
88 }
89 } else {
90 switch (card->info.type) {
91 case QETH_CARD_TYPE_OSD:
92 return " OSD Express";
93 case QETH_CARD_TYPE_IQD:
94 return " HiperSockets";
95 case QETH_CARD_TYPE_OSM:
96 return " OSM QDIO";
97 case QETH_CARD_TYPE_OSX:
98 return " OSX QDIO";
99 default:
100 return " unknown";
101 }
102 }
103 return " n/a";
104 }
105
106 /* max length to be returned: 14 */
qeth_get_cardname_short(struct qeth_card * card)107 const char *qeth_get_cardname_short(struct qeth_card *card)
108 {
109 if (IS_VM_NIC(card)) {
110 switch (card->info.type) {
111 case QETH_CARD_TYPE_OSD:
112 return "Virt.NIC QDIO";
113 case QETH_CARD_TYPE_IQD:
114 return "Virt.NIC Hiper";
115 case QETH_CARD_TYPE_OSM:
116 return "Virt.NIC OSM";
117 case QETH_CARD_TYPE_OSX:
118 return "Virt.NIC OSX";
119 default:
120 return "unknown";
121 }
122 } else {
123 switch (card->info.type) {
124 case QETH_CARD_TYPE_OSD:
125 switch (card->info.link_type) {
126 case QETH_LINK_TYPE_FAST_ETH:
127 return "OSD_100";
128 case QETH_LINK_TYPE_HSTR:
129 return "HSTR";
130 case QETH_LINK_TYPE_GBIT_ETH:
131 return "OSD_1000";
132 case QETH_LINK_TYPE_10GBIT_ETH:
133 return "OSD_10GIG";
134 case QETH_LINK_TYPE_25GBIT_ETH:
135 return "OSD_25GIG";
136 case QETH_LINK_TYPE_LANE_ETH100:
137 return "OSD_FE_LANE";
138 case QETH_LINK_TYPE_LANE_TR:
139 return "OSD_TR_LANE";
140 case QETH_LINK_TYPE_LANE_ETH1000:
141 return "OSD_GbE_LANE";
142 case QETH_LINK_TYPE_LANE:
143 return "OSD_ATM_LANE";
144 default:
145 return "OSD_Express";
146 }
147 case QETH_CARD_TYPE_IQD:
148 return "HiperSockets";
149 case QETH_CARD_TYPE_OSM:
150 return "OSM_1000";
151 case QETH_CARD_TYPE_OSX:
152 return "OSX_10GIG";
153 default:
154 return "unknown";
155 }
156 }
157 return "n/a";
158 }
159
qeth_set_allowed_threads(struct qeth_card * card,unsigned long threads,int clear_start_mask)160 void qeth_set_allowed_threads(struct qeth_card *card, unsigned long threads,
161 int clear_start_mask)
162 {
163 unsigned long flags;
164
165 spin_lock_irqsave(&card->thread_mask_lock, flags);
166 card->thread_allowed_mask = threads;
167 if (clear_start_mask)
168 card->thread_start_mask &= threads;
169 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
170 wake_up(&card->wait_q);
171 }
172 EXPORT_SYMBOL_GPL(qeth_set_allowed_threads);
173
qeth_threads_running(struct qeth_card * card,unsigned long threads)174 int qeth_threads_running(struct qeth_card *card, unsigned long threads)
175 {
176 unsigned long flags;
177 int rc = 0;
178
179 spin_lock_irqsave(&card->thread_mask_lock, flags);
180 rc = (card->thread_running_mask & threads);
181 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
182 return rc;
183 }
184 EXPORT_SYMBOL_GPL(qeth_threads_running);
185
qeth_clear_working_pool_list(struct qeth_card * card)186 static void qeth_clear_working_pool_list(struct qeth_card *card)
187 {
188 struct qeth_buffer_pool_entry *pool_entry, *tmp;
189 struct qeth_qdio_q *queue = card->qdio.in_q;
190 unsigned int i;
191
192 QETH_CARD_TEXT(card, 5, "clwrklst");
193 list_for_each_entry_safe(pool_entry, tmp,
194 &card->qdio.in_buf_pool.entry_list, list)
195 list_del(&pool_entry->list);
196
197 for (i = 0; i < ARRAY_SIZE(queue->bufs); i++)
198 queue->bufs[i].pool_entry = NULL;
199 }
200
qeth_free_pool_entry(struct qeth_buffer_pool_entry * entry)201 static void qeth_free_pool_entry(struct qeth_buffer_pool_entry *entry)
202 {
203 unsigned int i;
204
205 for (i = 0; i < ARRAY_SIZE(entry->elements); i++) {
206 if (entry->elements[i])
207 __free_page(entry->elements[i]);
208 }
209
210 kfree(entry);
211 }
212
qeth_free_buffer_pool(struct qeth_card * card)213 static void qeth_free_buffer_pool(struct qeth_card *card)
214 {
215 struct qeth_buffer_pool_entry *entry, *tmp;
216
217 list_for_each_entry_safe(entry, tmp, &card->qdio.init_pool.entry_list,
218 init_list) {
219 list_del(&entry->init_list);
220 qeth_free_pool_entry(entry);
221 }
222 }
223
qeth_alloc_pool_entry(unsigned int pages)224 static struct qeth_buffer_pool_entry *qeth_alloc_pool_entry(unsigned int pages)
225 {
226 struct qeth_buffer_pool_entry *entry;
227 unsigned int i;
228
229 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
230 if (!entry)
231 return NULL;
232
233 for (i = 0; i < pages; i++) {
234 entry->elements[i] = __dev_alloc_page(GFP_KERNEL);
235
236 if (!entry->elements[i]) {
237 qeth_free_pool_entry(entry);
238 return NULL;
239 }
240 }
241
242 return entry;
243 }
244
qeth_alloc_buffer_pool(struct qeth_card * card)245 static int qeth_alloc_buffer_pool(struct qeth_card *card)
246 {
247 unsigned int buf_elements = QETH_MAX_BUFFER_ELEMENTS(card);
248 unsigned int i;
249
250 QETH_CARD_TEXT(card, 5, "alocpool");
251 for (i = 0; i < card->qdio.init_pool.buf_count; ++i) {
252 struct qeth_buffer_pool_entry *entry;
253
254 entry = qeth_alloc_pool_entry(buf_elements);
255 if (!entry) {
256 qeth_free_buffer_pool(card);
257 return -ENOMEM;
258 }
259
260 list_add(&entry->init_list, &card->qdio.init_pool.entry_list);
261 }
262 return 0;
263 }
264
qeth_resize_buffer_pool(struct qeth_card * card,unsigned int count)265 int qeth_resize_buffer_pool(struct qeth_card *card, unsigned int count)
266 {
267 unsigned int buf_elements = QETH_MAX_BUFFER_ELEMENTS(card);
268 struct qeth_qdio_buffer_pool *pool = &card->qdio.init_pool;
269 struct qeth_buffer_pool_entry *entry, *tmp;
270 int delta = count - pool->buf_count;
271 LIST_HEAD(entries);
272
273 QETH_CARD_TEXT(card, 2, "realcbp");
274
275 /* Defer until pool is allocated: */
276 if (list_empty(&pool->entry_list))
277 goto out;
278
279 /* Remove entries from the pool: */
280 while (delta < 0) {
281 entry = list_first_entry(&pool->entry_list,
282 struct qeth_buffer_pool_entry,
283 init_list);
284 list_del(&entry->init_list);
285 qeth_free_pool_entry(entry);
286
287 delta++;
288 }
289
290 /* Allocate additional entries: */
291 while (delta > 0) {
292 entry = qeth_alloc_pool_entry(buf_elements);
293 if (!entry) {
294 list_for_each_entry_safe(entry, tmp, &entries,
295 init_list) {
296 list_del(&entry->init_list);
297 qeth_free_pool_entry(entry);
298 }
299
300 return -ENOMEM;
301 }
302
303 list_add(&entry->init_list, &entries);
304
305 delta--;
306 }
307
308 list_splice(&entries, &pool->entry_list);
309
310 out:
311 card->qdio.in_buf_pool.buf_count = count;
312 pool->buf_count = count;
313 return 0;
314 }
315 EXPORT_SYMBOL_GPL(qeth_resize_buffer_pool);
316
qeth_free_qdio_queue(struct qeth_qdio_q * q)317 static void qeth_free_qdio_queue(struct qeth_qdio_q *q)
318 {
319 if (!q)
320 return;
321
322 qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
323 kfree(q);
324 }
325
qeth_alloc_qdio_queue(void)326 static struct qeth_qdio_q *qeth_alloc_qdio_queue(void)
327 {
328 struct qeth_qdio_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
329 int i;
330
331 if (!q)
332 return NULL;
333
334 if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
335 kfree(q);
336 return NULL;
337 }
338
339 for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i)
340 q->bufs[i].buffer = q->qdio_bufs[i];
341
342 QETH_DBF_HEX(SETUP, 2, &q, sizeof(void *));
343 return q;
344 }
345
qeth_cq_init(struct qeth_card * card)346 static int qeth_cq_init(struct qeth_card *card)
347 {
348 int rc;
349
350 if (card->options.cq == QETH_CQ_ENABLED) {
351 QETH_CARD_TEXT(card, 2, "cqinit");
352 qdio_reset_buffers(card->qdio.c_q->qdio_bufs,
353 QDIO_MAX_BUFFERS_PER_Q);
354 card->qdio.c_q->next_buf_to_init = 127;
355
356 rc = qdio_add_bufs_to_input_queue(CARD_DDEV(card), 1, 0, 127);
357 if (rc) {
358 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
359 goto out;
360 }
361 }
362 rc = 0;
363 out:
364 return rc;
365 }
366
qeth_alloc_cq(struct qeth_card * card)367 static int qeth_alloc_cq(struct qeth_card *card)
368 {
369 if (card->options.cq == QETH_CQ_ENABLED) {
370 QETH_CARD_TEXT(card, 2, "cqon");
371 card->qdio.c_q = qeth_alloc_qdio_queue();
372 if (!card->qdio.c_q) {
373 dev_err(&card->gdev->dev, "Failed to create completion queue\n");
374 return -ENOMEM;
375 }
376 } else {
377 QETH_CARD_TEXT(card, 2, "nocq");
378 card->qdio.c_q = NULL;
379 }
380 return 0;
381 }
382
qeth_free_cq(struct qeth_card * card)383 static void qeth_free_cq(struct qeth_card *card)
384 {
385 if (card->qdio.c_q) {
386 qeth_free_qdio_queue(card->qdio.c_q);
387 card->qdio.c_q = NULL;
388 }
389 }
390
qeth_compute_cq_notification(int sbalf15,int delayed)391 static enum iucv_tx_notify qeth_compute_cq_notification(int sbalf15,
392 int delayed)
393 {
394 enum iucv_tx_notify n;
395
396 switch (sbalf15) {
397 case 0:
398 n = delayed ? TX_NOTIFY_DELAYED_OK : TX_NOTIFY_OK;
399 break;
400 case 4:
401 case 16:
402 case 17:
403 case 18:
404 n = delayed ? TX_NOTIFY_DELAYED_UNREACHABLE :
405 TX_NOTIFY_UNREACHABLE;
406 break;
407 default:
408 n = delayed ? TX_NOTIFY_DELAYED_GENERALERROR :
409 TX_NOTIFY_GENERALERROR;
410 break;
411 }
412
413 return n;
414 }
415
qeth_put_cmd(struct qeth_cmd_buffer * iob)416 static void qeth_put_cmd(struct qeth_cmd_buffer *iob)
417 {
418 if (refcount_dec_and_test(&iob->ref_count)) {
419 kfree(iob->data);
420 kfree(iob);
421 }
422 }
qeth_setup_ccw(struct ccw1 * ccw,u8 cmd_code,u8 flags,u32 len,void * data)423 static void qeth_setup_ccw(struct ccw1 *ccw, u8 cmd_code, u8 flags, u32 len,
424 void *data)
425 {
426 ccw->cmd_code = cmd_code;
427 ccw->flags = flags | CCW_FLAG_SLI;
428 ccw->count = len;
429 ccw->cda = (__u32)virt_to_phys(data);
430 }
431
__qeth_issue_next_read(struct qeth_card * card)432 static int __qeth_issue_next_read(struct qeth_card *card)
433 {
434 struct qeth_cmd_buffer *iob = card->read_cmd;
435 struct qeth_channel *channel = iob->channel;
436 struct ccw1 *ccw = __ccw_from_cmd(iob);
437 int rc;
438
439 QETH_CARD_TEXT(card, 5, "issnxrd");
440 if (channel->state != CH_STATE_UP)
441 return -EIO;
442
443 memset(iob->data, 0, iob->length);
444 qeth_setup_ccw(ccw, CCW_CMD_READ, 0, iob->length, iob->data);
445 iob->callback = qeth_issue_next_read_cb;
446 /* keep the cmd alive after completion: */
447 qeth_get_cmd(iob);
448
449 QETH_CARD_TEXT(card, 6, "noirqpnd");
450 rc = ccw_device_start(channel->ccwdev, ccw, (addr_t) iob, 0, 0);
451 if (!rc) {
452 channel->active_cmd = iob;
453 } else {
454 QETH_DBF_MESSAGE(2, "error %i on device %x when starting next read ccw!\n",
455 rc, CARD_DEVID(card));
456 qeth_unlock_channel(card, channel);
457 qeth_put_cmd(iob);
458 card->read_or_write_problem = 1;
459 qeth_schedule_recovery(card);
460 }
461 return rc;
462 }
463
qeth_issue_next_read(struct qeth_card * card)464 static int qeth_issue_next_read(struct qeth_card *card)
465 {
466 int ret;
467
468 spin_lock_irq(get_ccwdev_lock(CARD_RDEV(card)));
469 ret = __qeth_issue_next_read(card);
470 spin_unlock_irq(get_ccwdev_lock(CARD_RDEV(card)));
471
472 return ret;
473 }
474
qeth_enqueue_cmd(struct qeth_card * card,struct qeth_cmd_buffer * iob)475 static void qeth_enqueue_cmd(struct qeth_card *card,
476 struct qeth_cmd_buffer *iob)
477 {
478 spin_lock_irq(&card->lock);
479 list_add_tail(&iob->list_entry, &card->cmd_waiter_list);
480 spin_unlock_irq(&card->lock);
481 }
482
qeth_dequeue_cmd(struct qeth_card * card,struct qeth_cmd_buffer * iob)483 static void qeth_dequeue_cmd(struct qeth_card *card,
484 struct qeth_cmd_buffer *iob)
485 {
486 spin_lock_irq(&card->lock);
487 list_del(&iob->list_entry);
488 spin_unlock_irq(&card->lock);
489 }
490
qeth_notify_cmd(struct qeth_cmd_buffer * iob,int reason)491 static void qeth_notify_cmd(struct qeth_cmd_buffer *iob, int reason)
492 {
493 iob->rc = reason;
494 complete(&iob->done);
495 }
496
qeth_flush_local_addrs4(struct qeth_card * card)497 static void qeth_flush_local_addrs4(struct qeth_card *card)
498 {
499 struct qeth_local_addr *addr;
500 struct hlist_node *tmp;
501 unsigned int i;
502
503 spin_lock_irq(&card->local_addrs4_lock);
504 hash_for_each_safe(card->local_addrs4, i, tmp, addr, hnode) {
505 hash_del_rcu(&addr->hnode);
506 kfree_rcu(addr, rcu);
507 }
508 spin_unlock_irq(&card->local_addrs4_lock);
509 }
510
qeth_flush_local_addrs6(struct qeth_card * card)511 static void qeth_flush_local_addrs6(struct qeth_card *card)
512 {
513 struct qeth_local_addr *addr;
514 struct hlist_node *tmp;
515 unsigned int i;
516
517 spin_lock_irq(&card->local_addrs6_lock);
518 hash_for_each_safe(card->local_addrs6, i, tmp, addr, hnode) {
519 hash_del_rcu(&addr->hnode);
520 kfree_rcu(addr, rcu);
521 }
522 spin_unlock_irq(&card->local_addrs6_lock);
523 }
524
qeth_flush_local_addrs(struct qeth_card * card)525 static void qeth_flush_local_addrs(struct qeth_card *card)
526 {
527 qeth_flush_local_addrs4(card);
528 qeth_flush_local_addrs6(card);
529 }
530
qeth_add_local_addrs4(struct qeth_card * card,struct qeth_ipacmd_local_addrs4 * cmd)531 static void qeth_add_local_addrs4(struct qeth_card *card,
532 struct qeth_ipacmd_local_addrs4 *cmd)
533 {
534 unsigned int i;
535
536 if (cmd->addr_length !=
537 sizeof_field(struct qeth_ipacmd_local_addr4, addr)) {
538 dev_err_ratelimited(&card->gdev->dev,
539 "Dropped IPv4 ADD LOCAL ADDR event with bad length %u\n",
540 cmd->addr_length);
541 return;
542 }
543
544 spin_lock(&card->local_addrs4_lock);
545 for (i = 0; i < cmd->count; i++) {
546 unsigned int key = ipv4_addr_hash(cmd->addrs[i].addr);
547 struct qeth_local_addr *addr;
548 bool duplicate = false;
549
550 hash_for_each_possible(card->local_addrs4, addr, hnode, key) {
551 if (addr->addr.s6_addr32[3] == cmd->addrs[i].addr) {
552 duplicate = true;
553 break;
554 }
555 }
556
557 if (duplicate)
558 continue;
559
560 addr = kmalloc(sizeof(*addr), GFP_ATOMIC);
561 if (!addr) {
562 dev_err(&card->gdev->dev,
563 "Failed to allocate local addr object. Traffic to %pI4 might suffer.\n",
564 &cmd->addrs[i].addr);
565 continue;
566 }
567
568 ipv6_addr_set(&addr->addr, 0, 0, 0, cmd->addrs[i].addr);
569 hash_add_rcu(card->local_addrs4, &addr->hnode, key);
570 }
571 spin_unlock(&card->local_addrs4_lock);
572 }
573
qeth_add_local_addrs6(struct qeth_card * card,struct qeth_ipacmd_local_addrs6 * cmd)574 static void qeth_add_local_addrs6(struct qeth_card *card,
575 struct qeth_ipacmd_local_addrs6 *cmd)
576 {
577 unsigned int i;
578
579 if (cmd->addr_length !=
580 sizeof_field(struct qeth_ipacmd_local_addr6, addr)) {
581 dev_err_ratelimited(&card->gdev->dev,
582 "Dropped IPv6 ADD LOCAL ADDR event with bad length %u\n",
583 cmd->addr_length);
584 return;
585 }
586
587 spin_lock(&card->local_addrs6_lock);
588 for (i = 0; i < cmd->count; i++) {
589 u32 key = ipv6_addr_hash(&cmd->addrs[i].addr);
590 struct qeth_local_addr *addr;
591 bool duplicate = false;
592
593 hash_for_each_possible(card->local_addrs6, addr, hnode, key) {
594 if (ipv6_addr_equal(&addr->addr, &cmd->addrs[i].addr)) {
595 duplicate = true;
596 break;
597 }
598 }
599
600 if (duplicate)
601 continue;
602
603 addr = kmalloc(sizeof(*addr), GFP_ATOMIC);
604 if (!addr) {
605 dev_err(&card->gdev->dev,
606 "Failed to allocate local addr object. Traffic to %pI6c might suffer.\n",
607 &cmd->addrs[i].addr);
608 continue;
609 }
610
611 addr->addr = cmd->addrs[i].addr;
612 hash_add_rcu(card->local_addrs6, &addr->hnode, key);
613 }
614 spin_unlock(&card->local_addrs6_lock);
615 }
616
qeth_del_local_addrs4(struct qeth_card * card,struct qeth_ipacmd_local_addrs4 * cmd)617 static void qeth_del_local_addrs4(struct qeth_card *card,
618 struct qeth_ipacmd_local_addrs4 *cmd)
619 {
620 unsigned int i;
621
622 if (cmd->addr_length !=
623 sizeof_field(struct qeth_ipacmd_local_addr4, addr)) {
624 dev_err_ratelimited(&card->gdev->dev,
625 "Dropped IPv4 DEL LOCAL ADDR event with bad length %u\n",
626 cmd->addr_length);
627 return;
628 }
629
630 spin_lock(&card->local_addrs4_lock);
631 for (i = 0; i < cmd->count; i++) {
632 struct qeth_ipacmd_local_addr4 *addr = &cmd->addrs[i];
633 unsigned int key = ipv4_addr_hash(addr->addr);
634 struct qeth_local_addr *tmp;
635
636 hash_for_each_possible(card->local_addrs4, tmp, hnode, key) {
637 if (tmp->addr.s6_addr32[3] == addr->addr) {
638 hash_del_rcu(&tmp->hnode);
639 kfree_rcu(tmp, rcu);
640 break;
641 }
642 }
643 }
644 spin_unlock(&card->local_addrs4_lock);
645 }
646
qeth_del_local_addrs6(struct qeth_card * card,struct qeth_ipacmd_local_addrs6 * cmd)647 static void qeth_del_local_addrs6(struct qeth_card *card,
648 struct qeth_ipacmd_local_addrs6 *cmd)
649 {
650 unsigned int i;
651
652 if (cmd->addr_length !=
653 sizeof_field(struct qeth_ipacmd_local_addr6, addr)) {
654 dev_err_ratelimited(&card->gdev->dev,
655 "Dropped IPv6 DEL LOCAL ADDR event with bad length %u\n",
656 cmd->addr_length);
657 return;
658 }
659
660 spin_lock(&card->local_addrs6_lock);
661 for (i = 0; i < cmd->count; i++) {
662 struct qeth_ipacmd_local_addr6 *addr = &cmd->addrs[i];
663 u32 key = ipv6_addr_hash(&addr->addr);
664 struct qeth_local_addr *tmp;
665
666 hash_for_each_possible(card->local_addrs6, tmp, hnode, key) {
667 if (ipv6_addr_equal(&tmp->addr, &addr->addr)) {
668 hash_del_rcu(&tmp->hnode);
669 kfree_rcu(tmp, rcu);
670 break;
671 }
672 }
673 }
674 spin_unlock(&card->local_addrs6_lock);
675 }
676
qeth_next_hop_is_local_v4(struct qeth_card * card,struct sk_buff * skb)677 static bool qeth_next_hop_is_local_v4(struct qeth_card *card,
678 struct sk_buff *skb)
679 {
680 struct qeth_local_addr *tmp;
681 bool is_local = false;
682 unsigned int key;
683 __be32 next_hop;
684
685 if (hash_empty(card->local_addrs4))
686 return false;
687
688 rcu_read_lock();
689 next_hop = qeth_next_hop_v4_rcu(skb,
690 qeth_dst_check_rcu(skb, htons(ETH_P_IP)));
691 key = ipv4_addr_hash(next_hop);
692
693 hash_for_each_possible_rcu(card->local_addrs4, tmp, hnode, key) {
694 if (tmp->addr.s6_addr32[3] == next_hop) {
695 is_local = true;
696 break;
697 }
698 }
699 rcu_read_unlock();
700
701 return is_local;
702 }
703
qeth_next_hop_is_local_v6(struct qeth_card * card,struct sk_buff * skb)704 static bool qeth_next_hop_is_local_v6(struct qeth_card *card,
705 struct sk_buff *skb)
706 {
707 struct qeth_local_addr *tmp;
708 struct in6_addr *next_hop;
709 bool is_local = false;
710 u32 key;
711
712 if (hash_empty(card->local_addrs6))
713 return false;
714
715 rcu_read_lock();
716 next_hop = qeth_next_hop_v6_rcu(skb,
717 qeth_dst_check_rcu(skb, htons(ETH_P_IPV6)));
718 key = ipv6_addr_hash(next_hop);
719
720 hash_for_each_possible_rcu(card->local_addrs6, tmp, hnode, key) {
721 if (ipv6_addr_equal(&tmp->addr, next_hop)) {
722 is_local = true;
723 break;
724 }
725 }
726 rcu_read_unlock();
727
728 return is_local;
729 }
730
qeth_debugfs_local_addr_show(struct seq_file * m,void * v)731 static int qeth_debugfs_local_addr_show(struct seq_file *m, void *v)
732 {
733 struct qeth_card *card = m->private;
734 struct qeth_local_addr *tmp;
735 unsigned int i;
736
737 rcu_read_lock();
738 hash_for_each_rcu(card->local_addrs4, i, tmp, hnode)
739 seq_printf(m, "%pI4\n", &tmp->addr.s6_addr32[3]);
740 hash_for_each_rcu(card->local_addrs6, i, tmp, hnode)
741 seq_printf(m, "%pI6c\n", &tmp->addr);
742 rcu_read_unlock();
743
744 return 0;
745 }
746
747 DEFINE_SHOW_ATTRIBUTE(qeth_debugfs_local_addr);
748
qeth_issue_ipa_msg(struct qeth_ipa_cmd * cmd,int rc,struct qeth_card * card)749 static void qeth_issue_ipa_msg(struct qeth_ipa_cmd *cmd, int rc,
750 struct qeth_card *card)
751 {
752 const char *ipa_name;
753 int com = cmd->hdr.command;
754
755 ipa_name = qeth_get_ipa_cmd_name(com);
756
757 if (rc)
758 QETH_DBF_MESSAGE(2, "IPA: %s(%#x) for device %x returned %#x \"%s\"\n",
759 ipa_name, com, CARD_DEVID(card), rc,
760 qeth_get_ipa_msg(rc));
761 else
762 QETH_DBF_MESSAGE(5, "IPA: %s(%#x) for device %x succeeded\n",
763 ipa_name, com, CARD_DEVID(card));
764 }
765
qeth_default_link_info(struct qeth_card * card)766 static void qeth_default_link_info(struct qeth_card *card)
767 {
768 struct qeth_link_info *link_info = &card->info.link_info;
769
770 QETH_CARD_TEXT(card, 2, "dftlinfo");
771 link_info->duplex = DUPLEX_FULL;
772
773 if (IS_IQD(card) || IS_VM_NIC(card)) {
774 link_info->speed = SPEED_10000;
775 link_info->port = PORT_FIBRE;
776 link_info->link_mode = QETH_LINK_MODE_FIBRE_SHORT;
777 } else {
778 switch (card->info.link_type) {
779 case QETH_LINK_TYPE_FAST_ETH:
780 case QETH_LINK_TYPE_LANE_ETH100:
781 link_info->speed = SPEED_100;
782 link_info->port = PORT_TP;
783 break;
784 case QETH_LINK_TYPE_GBIT_ETH:
785 case QETH_LINK_TYPE_LANE_ETH1000:
786 link_info->speed = SPEED_1000;
787 link_info->port = PORT_FIBRE;
788 break;
789 case QETH_LINK_TYPE_10GBIT_ETH:
790 link_info->speed = SPEED_10000;
791 link_info->port = PORT_FIBRE;
792 break;
793 case QETH_LINK_TYPE_25GBIT_ETH:
794 link_info->speed = SPEED_25000;
795 link_info->port = PORT_FIBRE;
796 break;
797 default:
798 dev_info(&card->gdev->dev,
799 "Unknown link type %x\n",
800 card->info.link_type);
801 link_info->speed = SPEED_UNKNOWN;
802 link_info->port = PORT_OTHER;
803 }
804
805 link_info->link_mode = QETH_LINK_MODE_UNKNOWN;
806 }
807 }
808
qeth_check_ipa_data(struct qeth_card * card,struct qeth_ipa_cmd * cmd)809 static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card,
810 struct qeth_ipa_cmd *cmd)
811 {
812 QETH_CARD_TEXT(card, 5, "chkipad");
813
814 if (IS_IPA_REPLY(cmd)) {
815 if (cmd->hdr.command != IPA_CMD_SET_DIAG_ASS)
816 qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
817 return cmd;
818 }
819
820 /* handle unsolicited event: */
821 switch (cmd->hdr.command) {
822 case IPA_CMD_STOPLAN:
823 if (cmd->hdr.return_code == IPA_RC_VEPA_TO_VEB_TRANSITION) {
824 dev_err(&card->gdev->dev,
825 "Adjacent port of interface %s is no longer in reflective relay mode, trigger recovery\n",
826 netdev_name(card->dev));
827 /* Set offline, then probably fail to set online: */
828 qeth_schedule_recovery(card);
829 } else {
830 /* stay online for subsequent STARTLAN */
831 dev_warn(&card->gdev->dev,
832 "The link for interface %s on CHPID 0x%X failed\n",
833 netdev_name(card->dev), card->info.chpid);
834 qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
835 netif_carrier_off(card->dev);
836 qeth_default_link_info(card);
837 }
838 return NULL;
839 case IPA_CMD_STARTLAN:
840 dev_info(&card->gdev->dev,
841 "The link for %s on CHPID 0x%X has been restored\n",
842 netdev_name(card->dev), card->info.chpid);
843 if (card->info.hwtrap)
844 card->info.hwtrap = 2;
845 qeth_schedule_recovery(card);
846 return NULL;
847 case IPA_CMD_SETBRIDGEPORT_IQD:
848 case IPA_CMD_SETBRIDGEPORT_OSA:
849 case IPA_CMD_ADDRESS_CHANGE_NOTIF:
850 if (card->discipline->control_event_handler(card, cmd))
851 return cmd;
852 return NULL;
853 case IPA_CMD_REGISTER_LOCAL_ADDR:
854 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
855 qeth_add_local_addrs4(card, &cmd->data.local_addrs4);
856 else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
857 qeth_add_local_addrs6(card, &cmd->data.local_addrs6);
858
859 QETH_CARD_TEXT(card, 3, "irla");
860 return NULL;
861 case IPA_CMD_UNREGISTER_LOCAL_ADDR:
862 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
863 qeth_del_local_addrs4(card, &cmd->data.local_addrs4);
864 else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
865 qeth_del_local_addrs6(card, &cmd->data.local_addrs6);
866
867 QETH_CARD_TEXT(card, 3, "urla");
868 return NULL;
869 default:
870 QETH_DBF_MESSAGE(2, "Received data is IPA but not a reply!\n");
871 return cmd;
872 }
873 }
874
qeth_clear_ipacmd_list(struct qeth_card * card)875 static void qeth_clear_ipacmd_list(struct qeth_card *card)
876 {
877 struct qeth_cmd_buffer *iob;
878 unsigned long flags;
879
880 QETH_CARD_TEXT(card, 4, "clipalst");
881
882 spin_lock_irqsave(&card->lock, flags);
883 list_for_each_entry(iob, &card->cmd_waiter_list, list_entry)
884 qeth_notify_cmd(iob, -ECANCELED);
885 spin_unlock_irqrestore(&card->lock, flags);
886 }
887
qeth_check_idx_response(struct qeth_card * card,unsigned char * buffer)888 static int qeth_check_idx_response(struct qeth_card *card,
889 unsigned char *buffer)
890 {
891 QETH_DBF_HEX(CTRL, 2, buffer, QETH_DBF_CTRL_LEN);
892 if ((buffer[2] & QETH_IDX_TERMINATE_MASK) == QETH_IDX_TERMINATE) {
893 QETH_DBF_MESSAGE(2, "received an IDX TERMINATE with cause code %#04x\n",
894 buffer[4]);
895 QETH_CARD_TEXT(card, 2, "ckidxres");
896 QETH_CARD_TEXT(card, 2, " idxterm");
897 QETH_CARD_TEXT_(card, 2, "rc%x", buffer[4]);
898 if (buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT ||
899 buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT_VM) {
900 dev_err(&card->gdev->dev,
901 "The device does not support the configured transport mode\n");
902 return -EPROTONOSUPPORT;
903 }
904 return -EIO;
905 }
906 return 0;
907 }
908
qeth_release_buffer_cb(struct qeth_card * card,struct qeth_cmd_buffer * iob,unsigned int data_length)909 static void qeth_release_buffer_cb(struct qeth_card *card,
910 struct qeth_cmd_buffer *iob,
911 unsigned int data_length)
912 {
913 qeth_put_cmd(iob);
914 }
915
qeth_cancel_cmd(struct qeth_cmd_buffer * iob,int rc)916 static void qeth_cancel_cmd(struct qeth_cmd_buffer *iob, int rc)
917 {
918 qeth_notify_cmd(iob, rc);
919 qeth_put_cmd(iob);
920 }
921
qeth_alloc_cmd(struct qeth_channel * channel,unsigned int length,unsigned int ccws,long timeout)922 static struct qeth_cmd_buffer *qeth_alloc_cmd(struct qeth_channel *channel,
923 unsigned int length,
924 unsigned int ccws, long timeout)
925 {
926 struct qeth_cmd_buffer *iob;
927
928 if (length > QETH_BUFSIZE)
929 return NULL;
930
931 iob = kzalloc(sizeof(*iob), GFP_KERNEL);
932 if (!iob)
933 return NULL;
934
935 iob->data = kzalloc(ALIGN(length, 8) + ccws * sizeof(struct ccw1),
936 GFP_KERNEL | GFP_DMA);
937 if (!iob->data) {
938 kfree(iob);
939 return NULL;
940 }
941
942 init_completion(&iob->done);
943 spin_lock_init(&iob->lock);
944 refcount_set(&iob->ref_count, 1);
945 iob->channel = channel;
946 iob->timeout = timeout;
947 iob->length = length;
948 return iob;
949 }
950
qeth_issue_next_read_cb(struct qeth_card * card,struct qeth_cmd_buffer * iob,unsigned int data_length)951 static void qeth_issue_next_read_cb(struct qeth_card *card,
952 struct qeth_cmd_buffer *iob,
953 unsigned int data_length)
954 {
955 struct qeth_cmd_buffer *request = NULL;
956 struct qeth_ipa_cmd *cmd = NULL;
957 struct qeth_reply *reply = NULL;
958 struct qeth_cmd_buffer *tmp;
959 unsigned long flags;
960 int rc = 0;
961
962 QETH_CARD_TEXT(card, 4, "sndctlcb");
963 rc = qeth_check_idx_response(card, iob->data);
964 switch (rc) {
965 case 0:
966 break;
967 case -EIO:
968 qeth_schedule_recovery(card);
969 fallthrough;
970 default:
971 qeth_clear_ipacmd_list(card);
972 goto err_idx;
973 }
974
975 cmd = __ipa_reply(iob);
976 if (cmd) {
977 cmd = qeth_check_ipa_data(card, cmd);
978 if (!cmd)
979 goto out;
980 }
981
982 /* match against pending cmd requests */
983 spin_lock_irqsave(&card->lock, flags);
984 list_for_each_entry(tmp, &card->cmd_waiter_list, list_entry) {
985 if (tmp->match && tmp->match(tmp, iob)) {
986 request = tmp;
987 /* take the object outside the lock */
988 qeth_get_cmd(request);
989 break;
990 }
991 }
992 spin_unlock_irqrestore(&card->lock, flags);
993
994 if (!request)
995 goto out;
996
997 reply = &request->reply;
998 if (!reply->callback) {
999 rc = 0;
1000 goto no_callback;
1001 }
1002
1003 spin_lock_irqsave(&request->lock, flags);
1004 if (request->rc)
1005 /* Bail out when the requestor has already left: */
1006 rc = request->rc;
1007 else
1008 rc = reply->callback(card, reply, cmd ? (unsigned long)cmd :
1009 (unsigned long)iob);
1010 spin_unlock_irqrestore(&request->lock, flags);
1011
1012 no_callback:
1013 if (rc <= 0)
1014 qeth_notify_cmd(request, rc);
1015 qeth_put_cmd(request);
1016 out:
1017 memcpy(&card->seqno.pdu_hdr_ack,
1018 QETH_PDU_HEADER_SEQ_NO(iob->data),
1019 QETH_SEQ_NO_LENGTH);
1020 __qeth_issue_next_read(card);
1021 err_idx:
1022 qeth_put_cmd(iob);
1023 }
1024
qeth_set_thread_start_bit(struct qeth_card * card,unsigned long thread)1025 static int qeth_set_thread_start_bit(struct qeth_card *card,
1026 unsigned long thread)
1027 {
1028 unsigned long flags;
1029 int rc = 0;
1030
1031 spin_lock_irqsave(&card->thread_mask_lock, flags);
1032 if (!(card->thread_allowed_mask & thread))
1033 rc = -EPERM;
1034 else if (card->thread_start_mask & thread)
1035 rc = -EBUSY;
1036 else
1037 card->thread_start_mask |= thread;
1038 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1039
1040 return rc;
1041 }
1042
qeth_clear_thread_start_bit(struct qeth_card * card,unsigned long thread)1043 static void qeth_clear_thread_start_bit(struct qeth_card *card,
1044 unsigned long thread)
1045 {
1046 unsigned long flags;
1047
1048 spin_lock_irqsave(&card->thread_mask_lock, flags);
1049 card->thread_start_mask &= ~thread;
1050 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1051 wake_up(&card->wait_q);
1052 }
1053
qeth_clear_thread_running_bit(struct qeth_card * card,unsigned long thread)1054 static void qeth_clear_thread_running_bit(struct qeth_card *card,
1055 unsigned long thread)
1056 {
1057 unsigned long flags;
1058
1059 spin_lock_irqsave(&card->thread_mask_lock, flags);
1060 card->thread_running_mask &= ~thread;
1061 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1062 wake_up_all(&card->wait_q);
1063 }
1064
__qeth_do_run_thread(struct qeth_card * card,unsigned long thread)1065 static int __qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
1066 {
1067 unsigned long flags;
1068 int rc = 0;
1069
1070 spin_lock_irqsave(&card->thread_mask_lock, flags);
1071 if (card->thread_start_mask & thread) {
1072 if ((card->thread_allowed_mask & thread) &&
1073 !(card->thread_running_mask & thread)) {
1074 rc = 1;
1075 card->thread_start_mask &= ~thread;
1076 card->thread_running_mask |= thread;
1077 } else
1078 rc = -EPERM;
1079 }
1080 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1081 return rc;
1082 }
1083
qeth_do_run_thread(struct qeth_card * card,unsigned long thread)1084 static int qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
1085 {
1086 int rc = 0;
1087
1088 wait_event(card->wait_q,
1089 (rc = __qeth_do_run_thread(card, thread)) >= 0);
1090 return rc;
1091 }
1092
qeth_schedule_recovery(struct qeth_card * card)1093 int qeth_schedule_recovery(struct qeth_card *card)
1094 {
1095 int rc;
1096
1097 QETH_CARD_TEXT(card, 2, "startrec");
1098
1099 rc = qeth_set_thread_start_bit(card, QETH_RECOVER_THREAD);
1100 if (!rc)
1101 schedule_work(&card->kernel_thread_starter);
1102
1103 return rc;
1104 }
1105
qeth_get_problem(struct qeth_card * card,struct ccw_device * cdev,struct irb * irb)1106 static int qeth_get_problem(struct qeth_card *card, struct ccw_device *cdev,
1107 struct irb *irb)
1108 {
1109 int dstat, cstat;
1110 char *sense;
1111
1112 sense = (char *) irb->ecw;
1113 cstat = irb->scsw.cmd.cstat;
1114 dstat = irb->scsw.cmd.dstat;
1115
1116 if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK |
1117 SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK |
1118 SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) {
1119 QETH_CARD_TEXT(card, 2, "CGENCHK");
1120 dev_warn(&cdev->dev, "The qeth device driver "
1121 "failed to recover an error on the device\n");
1122 QETH_DBF_MESSAGE(2, "check on channel %x with dstat=%#x, cstat=%#x\n",
1123 CCW_DEVID(cdev), dstat, cstat);
1124 print_hex_dump(KERN_WARNING, "qeth: irb ", DUMP_PREFIX_OFFSET,
1125 16, 1, irb, 64, 1);
1126 return -EIO;
1127 }
1128
1129 if (dstat & DEV_STAT_UNIT_CHECK) {
1130 if (sense[SENSE_RESETTING_EVENT_BYTE] &
1131 SENSE_RESETTING_EVENT_FLAG) {
1132 QETH_CARD_TEXT(card, 2, "REVIND");
1133 return -EIO;
1134 }
1135 if (sense[SENSE_COMMAND_REJECT_BYTE] &
1136 SENSE_COMMAND_REJECT_FLAG) {
1137 QETH_CARD_TEXT(card, 2, "CMDREJi");
1138 return -EIO;
1139 }
1140 if ((sense[2] == 0xaf) && (sense[3] == 0xfe)) {
1141 QETH_CARD_TEXT(card, 2, "AFFE");
1142 return -EIO;
1143 }
1144 if ((!sense[0]) && (!sense[1]) && (!sense[2]) && (!sense[3])) {
1145 QETH_CARD_TEXT(card, 2, "ZEROSEN");
1146 return 0;
1147 }
1148 QETH_CARD_TEXT(card, 2, "DGENCHK");
1149 return -EIO;
1150 }
1151 return 0;
1152 }
1153
qeth_check_irb_error(struct qeth_card * card,struct ccw_device * cdev,struct irb * irb)1154 static int qeth_check_irb_error(struct qeth_card *card, struct ccw_device *cdev,
1155 struct irb *irb)
1156 {
1157 if (!IS_ERR(irb))
1158 return 0;
1159
1160 switch (PTR_ERR(irb)) {
1161 case -EIO:
1162 QETH_DBF_MESSAGE(2, "i/o-error on channel %x\n",
1163 CCW_DEVID(cdev));
1164 QETH_CARD_TEXT(card, 2, "ckirberr");
1165 QETH_CARD_TEXT_(card, 2, " rc%d", -EIO);
1166 return -EIO;
1167 case -ETIMEDOUT:
1168 dev_warn(&cdev->dev, "A hardware operation timed out"
1169 " on the device\n");
1170 QETH_CARD_TEXT(card, 2, "ckirberr");
1171 QETH_CARD_TEXT_(card, 2, " rc%d", -ETIMEDOUT);
1172 return -ETIMEDOUT;
1173 default:
1174 QETH_DBF_MESSAGE(2, "unknown error %ld on channel %x\n",
1175 PTR_ERR(irb), CCW_DEVID(cdev));
1176 QETH_CARD_TEXT(card, 2, "ckirberr");
1177 QETH_CARD_TEXT(card, 2, " rc???");
1178 return PTR_ERR(irb);
1179 }
1180 }
1181
qeth_irq(struct ccw_device * cdev,unsigned long intparm,struct irb * irb)1182 static void qeth_irq(struct ccw_device *cdev, unsigned long intparm,
1183 struct irb *irb)
1184 {
1185 int rc;
1186 int cstat, dstat;
1187 struct qeth_cmd_buffer *iob = NULL;
1188 struct ccwgroup_device *gdev;
1189 struct qeth_channel *channel;
1190 struct qeth_card *card;
1191
1192 /* while we hold the ccwdev lock, this stays valid: */
1193 gdev = dev_get_drvdata(&cdev->dev);
1194 card = dev_get_drvdata(&gdev->dev);
1195
1196 QETH_CARD_TEXT(card, 5, "irq");
1197
1198 if (card->read.ccwdev == cdev) {
1199 channel = &card->read;
1200 QETH_CARD_TEXT(card, 5, "read");
1201 } else if (card->write.ccwdev == cdev) {
1202 channel = &card->write;
1203 QETH_CARD_TEXT(card, 5, "write");
1204 } else {
1205 channel = &card->data;
1206 QETH_CARD_TEXT(card, 5, "data");
1207 }
1208
1209 if (intparm == 0) {
1210 QETH_CARD_TEXT(card, 5, "irqunsol");
1211 } else if ((addr_t)intparm != (addr_t)channel->active_cmd) {
1212 QETH_CARD_TEXT(card, 5, "irqunexp");
1213
1214 dev_err(&cdev->dev,
1215 "Received IRQ with intparm %lx, expected %px\n",
1216 intparm, channel->active_cmd);
1217 if (channel->active_cmd)
1218 qeth_cancel_cmd(channel->active_cmd, -EIO);
1219 } else {
1220 iob = (struct qeth_cmd_buffer *) (addr_t)intparm;
1221 }
1222
1223 qeth_unlock_channel(card, channel);
1224
1225 rc = qeth_check_irb_error(card, cdev, irb);
1226 if (rc) {
1227 /* IO was terminated, free its resources. */
1228 if (iob)
1229 qeth_cancel_cmd(iob, rc);
1230 return;
1231 }
1232
1233 if (irb->scsw.cmd.fctl & SCSW_FCTL_CLEAR_FUNC) {
1234 channel->state = CH_STATE_STOPPED;
1235 wake_up(&card->wait_q);
1236 }
1237
1238 if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) {
1239 channel->state = CH_STATE_HALTED;
1240 wake_up(&card->wait_q);
1241 }
1242
1243 if (iob && (irb->scsw.cmd.fctl & (SCSW_FCTL_CLEAR_FUNC |
1244 SCSW_FCTL_HALT_FUNC))) {
1245 qeth_cancel_cmd(iob, -ECANCELED);
1246 iob = NULL;
1247 }
1248
1249 cstat = irb->scsw.cmd.cstat;
1250 dstat = irb->scsw.cmd.dstat;
1251
1252 if ((dstat & DEV_STAT_UNIT_EXCEP) ||
1253 (dstat & DEV_STAT_UNIT_CHECK) ||
1254 (cstat)) {
1255 if (irb->esw.esw0.erw.cons) {
1256 dev_warn(&channel->ccwdev->dev,
1257 "The qeth device driver failed to recover "
1258 "an error on the device\n");
1259 QETH_DBF_MESSAGE(2, "sense data available on channel %x: cstat %#X dstat %#X\n",
1260 CCW_DEVID(channel->ccwdev), cstat,
1261 dstat);
1262 print_hex_dump(KERN_WARNING, "qeth: irb ",
1263 DUMP_PREFIX_OFFSET, 16, 1, irb, 32, 1);
1264 print_hex_dump(KERN_WARNING, "qeth: sense data ",
1265 DUMP_PREFIX_OFFSET, 16, 1, irb->ecw, 32, 1);
1266 }
1267
1268 rc = qeth_get_problem(card, cdev, irb);
1269 if (rc) {
1270 card->read_or_write_problem = 1;
1271 if (iob)
1272 qeth_cancel_cmd(iob, rc);
1273 qeth_clear_ipacmd_list(card);
1274 qeth_schedule_recovery(card);
1275 return;
1276 }
1277 }
1278
1279 if (iob) {
1280 /* sanity check: */
1281 if (irb->scsw.cmd.count > iob->length) {
1282 qeth_cancel_cmd(iob, -EIO);
1283 return;
1284 }
1285 if (iob->callback)
1286 iob->callback(card, iob,
1287 iob->length - irb->scsw.cmd.count);
1288 }
1289 }
1290
qeth_notify_skbs(struct qeth_qdio_out_q * q,struct qeth_qdio_out_buffer * buf,enum iucv_tx_notify notification)1291 static void qeth_notify_skbs(struct qeth_qdio_out_q *q,
1292 struct qeth_qdio_out_buffer *buf,
1293 enum iucv_tx_notify notification)
1294 {
1295 struct sk_buff *skb;
1296
1297 skb_queue_walk(&buf->skb_list, skb) {
1298 struct sock *sk = skb->sk;
1299
1300 QETH_CARD_TEXT_(q->card, 5, "skbn%d", notification);
1301 QETH_CARD_TEXT_(q->card, 5, "%lx", (long) skb);
1302 if (sk && sk->sk_family == PF_IUCV)
1303 iucv_sk(sk)->sk_txnotify(sk, notification);
1304 }
1305 }
1306
qeth_tx_complete_buf(struct qeth_qdio_out_q * queue,struct qeth_qdio_out_buffer * buf,bool error,int budget)1307 static void qeth_tx_complete_buf(struct qeth_qdio_out_q *queue,
1308 struct qeth_qdio_out_buffer *buf, bool error,
1309 int budget)
1310 {
1311 struct sk_buff *skb;
1312
1313 /* Empty buffer? */
1314 if (buf->next_element_to_fill == 0)
1315 return;
1316
1317 QETH_TXQ_STAT_INC(queue, bufs);
1318 QETH_TXQ_STAT_ADD(queue, buf_elements, buf->next_element_to_fill);
1319 if (error) {
1320 QETH_TXQ_STAT_ADD(queue, tx_errors, buf->frames);
1321 } else {
1322 QETH_TXQ_STAT_ADD(queue, tx_packets, buf->frames);
1323 QETH_TXQ_STAT_ADD(queue, tx_bytes, buf->bytes);
1324 }
1325
1326 while ((skb = __skb_dequeue(&buf->skb_list)) != NULL) {
1327 unsigned int bytes = qdisc_pkt_len(skb);
1328 bool is_tso = skb_is_gso(skb);
1329 unsigned int packets;
1330
1331 packets = is_tso ? skb_shinfo(skb)->gso_segs : 1;
1332 if (!error) {
1333 if (skb->ip_summed == CHECKSUM_PARTIAL)
1334 QETH_TXQ_STAT_ADD(queue, skbs_csum, packets);
1335 if (skb_is_nonlinear(skb))
1336 QETH_TXQ_STAT_INC(queue, skbs_sg);
1337 if (is_tso) {
1338 QETH_TXQ_STAT_INC(queue, skbs_tso);
1339 QETH_TXQ_STAT_ADD(queue, tso_bytes, bytes);
1340 }
1341 }
1342
1343 napi_consume_skb(skb, budget);
1344 }
1345 }
1346
qeth_clear_output_buffer(struct qeth_qdio_out_q * queue,struct qeth_qdio_out_buffer * buf,bool error,int budget)1347 static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
1348 struct qeth_qdio_out_buffer *buf,
1349 bool error, int budget)
1350 {
1351 int i;
1352
1353 /* is PCI flag set on buffer? */
1354 if (buf->buffer->element[0].sflags & SBAL_SFLAGS0_PCI_REQ) {
1355 atomic_dec(&queue->set_pci_flags_count);
1356 QETH_TXQ_STAT_INC(queue, completion_irq);
1357 }
1358
1359 qeth_tx_complete_buf(queue, buf, error, budget);
1360
1361 for (i = 0; i < queue->max_elements; ++i) {
1362 void *data = phys_to_virt(buf->buffer->element[i].addr);
1363
1364 if (__test_and_clear_bit(i, buf->from_kmem_cache) && data)
1365 kmem_cache_free(qeth_core_header_cache, data);
1366 }
1367
1368 qeth_scrub_qdio_buffer(buf->buffer, queue->max_elements);
1369 buf->next_element_to_fill = 0;
1370 buf->frames = 0;
1371 buf->bytes = 0;
1372 atomic_set(&buf->state, QETH_QDIO_BUF_EMPTY);
1373 }
1374
qeth_free_out_buf(struct qeth_qdio_out_buffer * buf)1375 static void qeth_free_out_buf(struct qeth_qdio_out_buffer *buf)
1376 {
1377 if (buf->aob)
1378 kmem_cache_free(qeth_qaob_cache, buf->aob);
1379 kmem_cache_free(qeth_qdio_outbuf_cache, buf);
1380 }
1381
qeth_tx_complete_pending_bufs(struct qeth_card * card,struct qeth_qdio_out_q * queue,bool drain,int budget)1382 static void qeth_tx_complete_pending_bufs(struct qeth_card *card,
1383 struct qeth_qdio_out_q *queue,
1384 bool drain, int budget)
1385 {
1386 struct qeth_qdio_out_buffer *buf, *tmp;
1387
1388 list_for_each_entry_safe(buf, tmp, &queue->pending_bufs, list_entry) {
1389 struct qeth_qaob_priv1 *priv;
1390 struct qaob *aob = buf->aob;
1391 enum iucv_tx_notify notify;
1392 unsigned int i;
1393
1394 priv = (struct qeth_qaob_priv1 *)&aob->user1;
1395 if (drain || READ_ONCE(priv->state) == QETH_QAOB_DONE) {
1396 QETH_CARD_TEXT(card, 5, "fp");
1397 QETH_CARD_TEXT_(card, 5, "%lx", (long) buf);
1398
1399 notify = drain ? TX_NOTIFY_GENERALERROR :
1400 qeth_compute_cq_notification(aob->aorc, 1);
1401 qeth_notify_skbs(queue, buf, notify);
1402 qeth_tx_complete_buf(queue, buf, drain, budget);
1403
1404 for (i = 0;
1405 i < aob->sb_count && i < queue->max_elements;
1406 i++) {
1407 void *data = phys_to_virt(aob->sba[i]);
1408
1409 if (test_bit(i, buf->from_kmem_cache) && data)
1410 kmem_cache_free(qeth_core_header_cache,
1411 data);
1412 }
1413
1414 list_del(&buf->list_entry);
1415 qeth_free_out_buf(buf);
1416 }
1417 }
1418 }
1419
qeth_drain_output_queue(struct qeth_qdio_out_q * q,bool free)1420 static void qeth_drain_output_queue(struct qeth_qdio_out_q *q, bool free)
1421 {
1422 int j;
1423
1424 qeth_tx_complete_pending_bufs(q->card, q, true, 0);
1425
1426 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
1427 if (!q->bufs[j])
1428 continue;
1429
1430 qeth_clear_output_buffer(q, q->bufs[j], true, 0);
1431 if (free) {
1432 qeth_free_out_buf(q->bufs[j]);
1433 q->bufs[j] = NULL;
1434 }
1435 }
1436 }
1437
qeth_drain_output_queues(struct qeth_card * card)1438 static void qeth_drain_output_queues(struct qeth_card *card)
1439 {
1440 int i;
1441
1442 QETH_CARD_TEXT(card, 2, "clearqdbf");
1443 /* clear outbound buffers to free skbs */
1444 for (i = 0; i < card->qdio.no_out_queues; ++i) {
1445 if (card->qdio.out_qs[i])
1446 qeth_drain_output_queue(card->qdio.out_qs[i], false);
1447 }
1448 }
1449
qeth_osa_set_output_queues(struct qeth_card * card,bool single)1450 static void qeth_osa_set_output_queues(struct qeth_card *card, bool single)
1451 {
1452 unsigned int max = single ? 1 : card->dev->num_tx_queues;
1453
1454 if (card->qdio.no_out_queues == max)
1455 return;
1456
1457 if (atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED)
1458 qeth_free_qdio_queues(card);
1459
1460 if (max == 1 && card->qdio.do_prio_queueing != QETH_PRIOQ_DEFAULT)
1461 dev_info(&card->gdev->dev, "Priority Queueing not supported\n");
1462
1463 card->qdio.no_out_queues = max;
1464 }
1465
qeth_update_from_chp_desc(struct qeth_card * card)1466 static int qeth_update_from_chp_desc(struct qeth_card *card)
1467 {
1468 struct ccw_device *ccwdev;
1469 struct channel_path_desc_fmt0 *chp_dsc;
1470
1471 QETH_CARD_TEXT(card, 2, "chp_desc");
1472
1473 ccwdev = card->data.ccwdev;
1474 chp_dsc = ccw_device_get_chp_desc(ccwdev, 0);
1475 if (!chp_dsc)
1476 return -ENOMEM;
1477
1478 card->info.func_level = 0x4100 + chp_dsc->desc;
1479
1480 if (IS_OSD(card) || IS_OSX(card))
1481 /* CHPP field bit 6 == 1 -> single queue */
1482 qeth_osa_set_output_queues(card, chp_dsc->chpp & 0x02);
1483
1484 kfree(chp_dsc);
1485 QETH_CARD_TEXT_(card, 2, "nr:%x", card->qdio.no_out_queues);
1486 QETH_CARD_TEXT_(card, 2, "lvl:%02x", card->info.func_level);
1487 return 0;
1488 }
1489
qeth_init_qdio_info(struct qeth_card * card)1490 static void qeth_init_qdio_info(struct qeth_card *card)
1491 {
1492 QETH_CARD_TEXT(card, 4, "intqdinf");
1493 atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
1494 card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT;
1495 card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
1496
1497 /* inbound */
1498 card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
1499 if (IS_IQD(card))
1500 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_HSDEFAULT;
1501 else
1502 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_DEFAULT;
1503 card->qdio.in_buf_pool.buf_count = card->qdio.init_pool.buf_count;
1504 INIT_LIST_HEAD(&card->qdio.in_buf_pool.entry_list);
1505 INIT_LIST_HEAD(&card->qdio.init_pool.entry_list);
1506 }
1507
qeth_set_initial_options(struct qeth_card * card)1508 static void qeth_set_initial_options(struct qeth_card *card)
1509 {
1510 card->options.route4.type = NO_ROUTER;
1511 card->options.route6.type = NO_ROUTER;
1512 card->options.isolation = ISOLATION_MODE_NONE;
1513 card->options.cq = QETH_CQ_DISABLED;
1514 card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
1515 }
1516
qeth_do_start_thread(struct qeth_card * card,unsigned long thread)1517 static int qeth_do_start_thread(struct qeth_card *card, unsigned long thread)
1518 {
1519 unsigned long flags;
1520 int rc = 0;
1521
1522 spin_lock_irqsave(&card->thread_mask_lock, flags);
1523 QETH_CARD_TEXT_(card, 4, " %02x%02x%02x",
1524 (u8) card->thread_start_mask,
1525 (u8) card->thread_allowed_mask,
1526 (u8) card->thread_running_mask);
1527 rc = (card->thread_start_mask & thread);
1528 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1529 return rc;
1530 }
1531
1532 static int qeth_do_reset(void *data);
qeth_start_kernel_thread(struct work_struct * work)1533 static void qeth_start_kernel_thread(struct work_struct *work)
1534 {
1535 struct task_struct *ts;
1536 struct qeth_card *card = container_of(work, struct qeth_card,
1537 kernel_thread_starter);
1538 QETH_CARD_TEXT(card, 2, "strthrd");
1539
1540 if (card->read.state != CH_STATE_UP &&
1541 card->write.state != CH_STATE_UP)
1542 return;
1543 if (qeth_do_start_thread(card, QETH_RECOVER_THREAD)) {
1544 ts = kthread_run(qeth_do_reset, card, "qeth_recover");
1545 if (IS_ERR(ts)) {
1546 qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1547 qeth_clear_thread_running_bit(card,
1548 QETH_RECOVER_THREAD);
1549 }
1550 }
1551 }
1552
1553 static void qeth_buffer_reclaim_work(struct work_struct *);
qeth_setup_card(struct qeth_card * card)1554 static void qeth_setup_card(struct qeth_card *card)
1555 {
1556 QETH_CARD_TEXT(card, 2, "setupcrd");
1557
1558 card->info.type = CARD_RDEV(card)->id.driver_info;
1559 card->state = CARD_STATE_DOWN;
1560 spin_lock_init(&card->lock);
1561 spin_lock_init(&card->thread_mask_lock);
1562 mutex_init(&card->conf_mutex);
1563 mutex_init(&card->discipline_mutex);
1564 INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread);
1565 INIT_LIST_HEAD(&card->cmd_waiter_list);
1566 init_waitqueue_head(&card->wait_q);
1567 qeth_set_initial_options(card);
1568 /* IP address takeover */
1569 INIT_LIST_HEAD(&card->ipato.entries);
1570 qeth_init_qdio_info(card);
1571 INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work);
1572 hash_init(card->rx_mode_addrs);
1573 hash_init(card->local_addrs4);
1574 hash_init(card->local_addrs6);
1575 spin_lock_init(&card->local_addrs4_lock);
1576 spin_lock_init(&card->local_addrs6_lock);
1577 }
1578
qeth_core_sl_print(struct seq_file * m,struct service_level * slr)1579 static void qeth_core_sl_print(struct seq_file *m, struct service_level *slr)
1580 {
1581 struct qeth_card *card = container_of(slr, struct qeth_card,
1582 qeth_service_level);
1583 if (card->info.mcl_level[0])
1584 seq_printf(m, "qeth: %s firmware level %s\n",
1585 CARD_BUS_ID(card), card->info.mcl_level);
1586 }
1587
qeth_alloc_card(struct ccwgroup_device * gdev)1588 static struct qeth_card *qeth_alloc_card(struct ccwgroup_device *gdev)
1589 {
1590 struct qeth_card *card;
1591
1592 QETH_DBF_TEXT(SETUP, 2, "alloccrd");
1593 card = kzalloc(sizeof(*card), GFP_KERNEL);
1594 if (!card)
1595 goto out;
1596 QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1597
1598 card->gdev = gdev;
1599 dev_set_drvdata(&gdev->dev, card);
1600 CARD_RDEV(card) = gdev->cdev[0];
1601 CARD_WDEV(card) = gdev->cdev[1];
1602 CARD_DDEV(card) = gdev->cdev[2];
1603
1604 card->event_wq = alloc_ordered_workqueue("%s_event", 0,
1605 dev_name(&gdev->dev));
1606 if (!card->event_wq)
1607 goto out_wq;
1608
1609 card->read_cmd = qeth_alloc_cmd(&card->read, QETH_BUFSIZE, 1, 0);
1610 if (!card->read_cmd)
1611 goto out_read_cmd;
1612
1613 card->debugfs = debugfs_create_dir(dev_name(&gdev->dev),
1614 qeth_debugfs_root);
1615 debugfs_create_file("local_addrs", 0400, card->debugfs, card,
1616 &qeth_debugfs_local_addr_fops);
1617
1618 card->qeth_service_level.seq_print = qeth_core_sl_print;
1619 register_service_level(&card->qeth_service_level);
1620 return card;
1621
1622 out_read_cmd:
1623 destroy_workqueue(card->event_wq);
1624 out_wq:
1625 dev_set_drvdata(&gdev->dev, NULL);
1626 kfree(card);
1627 out:
1628 return NULL;
1629 }
1630
qeth_clear_channel(struct qeth_card * card,struct qeth_channel * channel)1631 static int qeth_clear_channel(struct qeth_card *card,
1632 struct qeth_channel *channel)
1633 {
1634 int rc;
1635
1636 QETH_CARD_TEXT(card, 3, "clearch");
1637 spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1638 rc = ccw_device_clear(channel->ccwdev, (addr_t)channel->active_cmd);
1639 spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1640
1641 if (rc)
1642 return rc;
1643 rc = wait_event_interruptible_timeout(card->wait_q,
1644 channel->state == CH_STATE_STOPPED, QETH_TIMEOUT);
1645 if (rc == -ERESTARTSYS)
1646 return rc;
1647 if (channel->state != CH_STATE_STOPPED)
1648 return -ETIME;
1649 channel->state = CH_STATE_DOWN;
1650 return 0;
1651 }
1652
qeth_halt_channel(struct qeth_card * card,struct qeth_channel * channel)1653 static int qeth_halt_channel(struct qeth_card *card,
1654 struct qeth_channel *channel)
1655 {
1656 int rc;
1657
1658 QETH_CARD_TEXT(card, 3, "haltch");
1659 spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1660 rc = ccw_device_halt(channel->ccwdev, (addr_t)channel->active_cmd);
1661 spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1662
1663 if (rc)
1664 return rc;
1665 rc = wait_event_interruptible_timeout(card->wait_q,
1666 channel->state == CH_STATE_HALTED, QETH_TIMEOUT);
1667 if (rc == -ERESTARTSYS)
1668 return rc;
1669 if (channel->state != CH_STATE_HALTED)
1670 return -ETIME;
1671 return 0;
1672 }
1673
qeth_stop_channel(struct qeth_channel * channel)1674 static int qeth_stop_channel(struct qeth_channel *channel)
1675 {
1676 struct ccw_device *cdev = channel->ccwdev;
1677 int rc;
1678
1679 rc = ccw_device_set_offline(cdev);
1680
1681 spin_lock_irq(get_ccwdev_lock(cdev));
1682 if (channel->active_cmd)
1683 dev_err(&cdev->dev, "Stopped channel while cmd %px was still active\n",
1684 channel->active_cmd);
1685
1686 cdev->handler = NULL;
1687 spin_unlock_irq(get_ccwdev_lock(cdev));
1688
1689 return rc;
1690 }
1691
qeth_start_channel(struct qeth_channel * channel)1692 static int qeth_start_channel(struct qeth_channel *channel)
1693 {
1694 struct ccw_device *cdev = channel->ccwdev;
1695 int rc;
1696
1697 channel->state = CH_STATE_DOWN;
1698 xchg(&channel->active_cmd, NULL);
1699
1700 spin_lock_irq(get_ccwdev_lock(cdev));
1701 cdev->handler = qeth_irq;
1702 spin_unlock_irq(get_ccwdev_lock(cdev));
1703
1704 rc = ccw_device_set_online(cdev);
1705 if (rc)
1706 goto err;
1707
1708 return 0;
1709
1710 err:
1711 spin_lock_irq(get_ccwdev_lock(cdev));
1712 cdev->handler = NULL;
1713 spin_unlock_irq(get_ccwdev_lock(cdev));
1714 return rc;
1715 }
1716
qeth_halt_channels(struct qeth_card * card)1717 static int qeth_halt_channels(struct qeth_card *card)
1718 {
1719 int rc1 = 0, rc2 = 0, rc3 = 0;
1720
1721 QETH_CARD_TEXT(card, 3, "haltchs");
1722 rc1 = qeth_halt_channel(card, &card->read);
1723 rc2 = qeth_halt_channel(card, &card->write);
1724 rc3 = qeth_halt_channel(card, &card->data);
1725 if (rc1)
1726 return rc1;
1727 if (rc2)
1728 return rc2;
1729 return rc3;
1730 }
1731
qeth_clear_channels(struct qeth_card * card)1732 static int qeth_clear_channels(struct qeth_card *card)
1733 {
1734 int rc1 = 0, rc2 = 0, rc3 = 0;
1735
1736 QETH_CARD_TEXT(card, 3, "clearchs");
1737 rc1 = qeth_clear_channel(card, &card->read);
1738 rc2 = qeth_clear_channel(card, &card->write);
1739 rc3 = qeth_clear_channel(card, &card->data);
1740 if (rc1)
1741 return rc1;
1742 if (rc2)
1743 return rc2;
1744 return rc3;
1745 }
1746
qeth_clear_halt_card(struct qeth_card * card,int halt)1747 static int qeth_clear_halt_card(struct qeth_card *card, int halt)
1748 {
1749 int rc = 0;
1750
1751 QETH_CARD_TEXT(card, 3, "clhacrd");
1752
1753 if (halt)
1754 rc = qeth_halt_channels(card);
1755 if (rc)
1756 return rc;
1757 return qeth_clear_channels(card);
1758 }
1759
qeth_qdio_clear_card(struct qeth_card * card,int use_halt)1760 static int qeth_qdio_clear_card(struct qeth_card *card, int use_halt)
1761 {
1762 int rc = 0;
1763
1764 QETH_CARD_TEXT(card, 3, "qdioclr");
1765 switch (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ESTABLISHED,
1766 QETH_QDIO_CLEANING)) {
1767 case QETH_QDIO_ESTABLISHED:
1768 if (IS_IQD(card))
1769 rc = qdio_shutdown(CARD_DDEV(card),
1770 QDIO_FLAG_CLEANUP_USING_HALT);
1771 else
1772 rc = qdio_shutdown(CARD_DDEV(card),
1773 QDIO_FLAG_CLEANUP_USING_CLEAR);
1774 if (rc)
1775 QETH_CARD_TEXT_(card, 3, "1err%d", rc);
1776 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
1777 break;
1778 case QETH_QDIO_CLEANING:
1779 return rc;
1780 default:
1781 break;
1782 }
1783 rc = qeth_clear_halt_card(card, use_halt);
1784 if (rc)
1785 QETH_CARD_TEXT_(card, 3, "2err%d", rc);
1786 return rc;
1787 }
1788
qeth_vm_detect_layer(struct qeth_card * card)1789 static enum qeth_discipline_id qeth_vm_detect_layer(struct qeth_card *card)
1790 {
1791 enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1792 struct diag26c_vnic_resp *response = NULL;
1793 struct diag26c_vnic_req *request = NULL;
1794 struct ccw_dev_id id;
1795 char userid[80];
1796 int rc = 0;
1797
1798 QETH_CARD_TEXT(card, 2, "vmlayer");
1799
1800 cpcmd("QUERY USERID", userid, sizeof(userid), &rc);
1801 if (rc)
1802 goto out;
1803
1804 request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
1805 response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
1806 if (!request || !response) {
1807 rc = -ENOMEM;
1808 goto out;
1809 }
1810
1811 ccw_device_get_id(CARD_RDEV(card), &id);
1812 request->resp_buf_len = sizeof(*response);
1813 request->resp_version = DIAG26C_VERSION6_VM65918;
1814 request->req_format = DIAG26C_VNIC_INFO;
1815 ASCEBC(userid, 8);
1816 memcpy(&request->sys_name, userid, 8);
1817 request->devno = id.devno;
1818
1819 QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1820 rc = diag26c(request, response, DIAG26C_PORT_VNIC);
1821 QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1822 if (rc)
1823 goto out;
1824 QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
1825
1826 if (request->resp_buf_len < sizeof(*response) ||
1827 response->version != request->resp_version) {
1828 rc = -EIO;
1829 goto out;
1830 }
1831
1832 if (response->protocol == VNIC_INFO_PROT_L2)
1833 disc = QETH_DISCIPLINE_LAYER2;
1834 else if (response->protocol == VNIC_INFO_PROT_L3)
1835 disc = QETH_DISCIPLINE_LAYER3;
1836
1837 out:
1838 kfree(response);
1839 kfree(request);
1840 if (rc)
1841 QETH_CARD_TEXT_(card, 2, "err%x", rc);
1842 return disc;
1843 }
1844
1845 /* Determine whether the device requires a specific layer discipline */
qeth_enforce_discipline(struct qeth_card * card)1846 static enum qeth_discipline_id qeth_enforce_discipline(struct qeth_card *card)
1847 {
1848 enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1849
1850 if (IS_OSM(card))
1851 disc = QETH_DISCIPLINE_LAYER2;
1852 else if (IS_VM_NIC(card))
1853 disc = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
1854 qeth_vm_detect_layer(card);
1855
1856 switch (disc) {
1857 case QETH_DISCIPLINE_LAYER2:
1858 QETH_CARD_TEXT(card, 3, "force l2");
1859 break;
1860 case QETH_DISCIPLINE_LAYER3:
1861 QETH_CARD_TEXT(card, 3, "force l3");
1862 break;
1863 default:
1864 QETH_CARD_TEXT(card, 3, "force no");
1865 }
1866
1867 return disc;
1868 }
1869
qeth_set_blkt_defaults(struct qeth_card * card)1870 static void qeth_set_blkt_defaults(struct qeth_card *card)
1871 {
1872 QETH_CARD_TEXT(card, 2, "cfgblkt");
1873
1874 if (card->info.use_v1_blkt) {
1875 card->info.blkt.time_total = 0;
1876 card->info.blkt.inter_packet = 0;
1877 card->info.blkt.inter_packet_jumbo = 0;
1878 } else {
1879 card->info.blkt.time_total = 250;
1880 card->info.blkt.inter_packet = 5;
1881 card->info.blkt.inter_packet_jumbo = 15;
1882 }
1883 }
1884
qeth_idx_init(struct qeth_card * card)1885 static void qeth_idx_init(struct qeth_card *card)
1886 {
1887 memset(&card->seqno, 0, sizeof(card->seqno));
1888
1889 card->token.issuer_rm_w = 0x00010103UL;
1890 card->token.cm_filter_w = 0x00010108UL;
1891 card->token.cm_connection_w = 0x0001010aUL;
1892 card->token.ulp_filter_w = 0x0001010bUL;
1893 card->token.ulp_connection_w = 0x0001010dUL;
1894
1895 switch (card->info.type) {
1896 case QETH_CARD_TYPE_IQD:
1897 card->info.func_level = QETH_IDX_FUNC_LEVEL_IQD;
1898 break;
1899 case QETH_CARD_TYPE_OSD:
1900 card->info.func_level = QETH_IDX_FUNC_LEVEL_OSD;
1901 break;
1902 default:
1903 break;
1904 }
1905 }
1906
qeth_idx_finalize_cmd(struct qeth_card * card,struct qeth_cmd_buffer * iob)1907 static void qeth_idx_finalize_cmd(struct qeth_card *card,
1908 struct qeth_cmd_buffer *iob)
1909 {
1910 memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data), &card->seqno.trans_hdr,
1911 QETH_SEQ_NO_LENGTH);
1912 if (iob->channel == &card->write)
1913 card->seqno.trans_hdr++;
1914 }
1915
qeth_peer_func_level(int level)1916 static int qeth_peer_func_level(int level)
1917 {
1918 if ((level & 0xff) == 8)
1919 return (level & 0xff) + 0x400;
1920 if (((level >> 8) & 3) == 1)
1921 return (level & 0xff) + 0x200;
1922 return level;
1923 }
1924
qeth_mpc_finalize_cmd(struct qeth_card * card,struct qeth_cmd_buffer * iob)1925 static void qeth_mpc_finalize_cmd(struct qeth_card *card,
1926 struct qeth_cmd_buffer *iob)
1927 {
1928 qeth_idx_finalize_cmd(card, iob);
1929
1930 memcpy(QETH_PDU_HEADER_SEQ_NO(iob->data),
1931 &card->seqno.pdu_hdr, QETH_SEQ_NO_LENGTH);
1932 card->seqno.pdu_hdr++;
1933 memcpy(QETH_PDU_HEADER_ACK_SEQ_NO(iob->data),
1934 &card->seqno.pdu_hdr_ack, QETH_SEQ_NO_LENGTH);
1935
1936 iob->callback = qeth_release_buffer_cb;
1937 }
1938
qeth_mpc_match_reply(struct qeth_cmd_buffer * iob,struct qeth_cmd_buffer * reply)1939 static bool qeth_mpc_match_reply(struct qeth_cmd_buffer *iob,
1940 struct qeth_cmd_buffer *reply)
1941 {
1942 /* MPC cmds are issued strictly in sequence. */
1943 return !IS_IPA(reply->data);
1944 }
1945
qeth_mpc_alloc_cmd(struct qeth_card * card,const void * data,unsigned int data_length)1946 static struct qeth_cmd_buffer *qeth_mpc_alloc_cmd(struct qeth_card *card,
1947 const void *data,
1948 unsigned int data_length)
1949 {
1950 struct qeth_cmd_buffer *iob;
1951
1952 iob = qeth_alloc_cmd(&card->write, data_length, 1, QETH_TIMEOUT);
1953 if (!iob)
1954 return NULL;
1955
1956 memcpy(iob->data, data, data_length);
1957 qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, data_length,
1958 iob->data);
1959 iob->finalize = qeth_mpc_finalize_cmd;
1960 iob->match = qeth_mpc_match_reply;
1961 return iob;
1962 }
1963
1964 /**
1965 * qeth_send_control_data() - send control command to the card
1966 * @card: qeth_card structure pointer
1967 * @iob: qeth_cmd_buffer pointer
1968 * @reply_cb: callback function pointer
1969 * cb_card: pointer to the qeth_card structure
1970 * cb_reply: pointer to the qeth_reply structure
1971 * cb_cmd: pointer to the original iob for non-IPA
1972 * commands, or to the qeth_ipa_cmd structure
1973 * for the IPA commands.
1974 * @reply_param: private pointer passed to the callback
1975 *
1976 * Callback function gets called one or more times, with cb_cmd
1977 * pointing to the response returned by the hardware. Callback
1978 * function must return
1979 * > 0 if more reply blocks are expected,
1980 * 0 if the last or only reply block is received, and
1981 * < 0 on error.
1982 * Callback function can get the value of the reply_param pointer from the
1983 * field 'param' of the structure qeth_reply.
1984 */
1985
qeth_send_control_data(struct qeth_card * card,struct qeth_cmd_buffer * iob,int (* reply_cb)(struct qeth_card * cb_card,struct qeth_reply * cb_reply,unsigned long cb_cmd),void * reply_param)1986 static int qeth_send_control_data(struct qeth_card *card,
1987 struct qeth_cmd_buffer *iob,
1988 int (*reply_cb)(struct qeth_card *cb_card,
1989 struct qeth_reply *cb_reply,
1990 unsigned long cb_cmd),
1991 void *reply_param)
1992 {
1993 struct qeth_channel *channel = iob->channel;
1994 struct qeth_reply *reply = &iob->reply;
1995 long timeout = iob->timeout;
1996 int rc;
1997
1998 QETH_CARD_TEXT(card, 2, "sendctl");
1999
2000 reply->callback = reply_cb;
2001 reply->param = reply_param;
2002
2003 timeout = wait_event_interruptible_timeout(card->wait_q,
2004 qeth_trylock_channel(channel, iob),
2005 timeout);
2006 if (timeout <= 0) {
2007 qeth_put_cmd(iob);
2008 return (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
2009 }
2010
2011 if (iob->finalize)
2012 iob->finalize(card, iob);
2013 QETH_DBF_HEX(CTRL, 2, iob->data, min(iob->length, QETH_DBF_CTRL_LEN));
2014
2015 qeth_enqueue_cmd(card, iob);
2016
2017 /* This pairs with iob->callback, and keeps the iob alive after IO: */
2018 qeth_get_cmd(iob);
2019
2020 QETH_CARD_TEXT(card, 6, "noirqpnd");
2021 spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
2022 rc = ccw_device_start_timeout(channel->ccwdev, __ccw_from_cmd(iob),
2023 (addr_t) iob, 0, 0, timeout);
2024 spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
2025 if (rc) {
2026 QETH_DBF_MESSAGE(2, "qeth_send_control_data on device %x: ccw_device_start rc = %i\n",
2027 CARD_DEVID(card), rc);
2028 QETH_CARD_TEXT_(card, 2, " err%d", rc);
2029 qeth_dequeue_cmd(card, iob);
2030 qeth_put_cmd(iob);
2031 qeth_unlock_channel(card, channel);
2032 goto out;
2033 }
2034
2035 timeout = wait_for_completion_interruptible_timeout(&iob->done,
2036 timeout);
2037 if (timeout <= 0)
2038 rc = (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
2039
2040 qeth_dequeue_cmd(card, iob);
2041
2042 if (reply_cb) {
2043 /* Wait until the callback for a late reply has completed: */
2044 spin_lock_irq(&iob->lock);
2045 if (rc)
2046 /* Zap any callback that's still pending: */
2047 iob->rc = rc;
2048 spin_unlock_irq(&iob->lock);
2049 }
2050
2051 if (!rc)
2052 rc = iob->rc;
2053
2054 out:
2055 qeth_put_cmd(iob);
2056 return rc;
2057 }
2058
2059 struct qeth_node_desc {
2060 struct node_descriptor nd1;
2061 struct node_descriptor nd2;
2062 struct node_descriptor nd3;
2063 };
2064
qeth_read_conf_data_cb(struct qeth_card * card,struct qeth_cmd_buffer * iob,unsigned int data_length)2065 static void qeth_read_conf_data_cb(struct qeth_card *card,
2066 struct qeth_cmd_buffer *iob,
2067 unsigned int data_length)
2068 {
2069 struct qeth_node_desc *nd = (struct qeth_node_desc *) iob->data;
2070 int rc = 0;
2071 u8 *tag;
2072
2073 QETH_CARD_TEXT(card, 2, "cfgunit");
2074
2075 if (data_length < sizeof(*nd)) {
2076 rc = -EINVAL;
2077 goto out;
2078 }
2079
2080 card->info.is_vm_nic = nd->nd1.plant[0] == _ascebc['V'] &&
2081 nd->nd1.plant[1] == _ascebc['M'];
2082 tag = (u8 *)&nd->nd1.tag;
2083 card->info.chpid = tag[0];
2084 card->info.unit_addr2 = tag[1];
2085
2086 tag = (u8 *)&nd->nd2.tag;
2087 card->info.cula = tag[1];
2088
2089 card->info.use_v1_blkt = nd->nd3.model[0] == 0xF0 &&
2090 nd->nd3.model[1] == 0xF0 &&
2091 nd->nd3.model[2] >= 0xF1 &&
2092 nd->nd3.model[2] <= 0xF4;
2093
2094 out:
2095 qeth_notify_cmd(iob, rc);
2096 qeth_put_cmd(iob);
2097 }
2098
qeth_read_conf_data(struct qeth_card * card)2099 static int qeth_read_conf_data(struct qeth_card *card)
2100 {
2101 struct qeth_channel *channel = &card->data;
2102 struct qeth_cmd_buffer *iob;
2103 struct ciw *ciw;
2104
2105 /* scan for RCD command in extended SenseID data */
2106 ciw = ccw_device_get_ciw(channel->ccwdev, CIW_TYPE_RCD);
2107 if (!ciw || ciw->cmd == 0)
2108 return -EOPNOTSUPP;
2109 if (ciw->count < sizeof(struct qeth_node_desc))
2110 return -EINVAL;
2111
2112 iob = qeth_alloc_cmd(channel, ciw->count, 1, QETH_RCD_TIMEOUT);
2113 if (!iob)
2114 return -ENOMEM;
2115
2116 iob->callback = qeth_read_conf_data_cb;
2117 qeth_setup_ccw(__ccw_from_cmd(iob), ciw->cmd, 0, iob->length,
2118 iob->data);
2119
2120 return qeth_send_control_data(card, iob, NULL, NULL);
2121 }
2122
qeth_idx_check_activate_response(struct qeth_card * card,struct qeth_channel * channel,struct qeth_cmd_buffer * iob)2123 static int qeth_idx_check_activate_response(struct qeth_card *card,
2124 struct qeth_channel *channel,
2125 struct qeth_cmd_buffer *iob)
2126 {
2127 int rc;
2128
2129 rc = qeth_check_idx_response(card, iob->data);
2130 if (rc)
2131 return rc;
2132
2133 if (QETH_IS_IDX_ACT_POS_REPLY(iob->data))
2134 return 0;
2135
2136 /* negative reply: */
2137 QETH_CARD_TEXT_(card, 2, "idxneg%c",
2138 QETH_IDX_ACT_CAUSE_CODE(iob->data));
2139
2140 switch (QETH_IDX_ACT_CAUSE_CODE(iob->data)) {
2141 case QETH_IDX_ACT_ERR_EXCL:
2142 dev_err(&channel->ccwdev->dev,
2143 "The adapter is used exclusively by another host\n");
2144 return -EBUSY;
2145 case QETH_IDX_ACT_ERR_AUTH:
2146 case QETH_IDX_ACT_ERR_AUTH_USER:
2147 dev_err(&channel->ccwdev->dev,
2148 "Setting the device online failed because of insufficient authorization\n");
2149 return -EPERM;
2150 default:
2151 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: negative reply\n",
2152 CCW_DEVID(channel->ccwdev));
2153 return -EIO;
2154 }
2155 }
2156
qeth_idx_activate_read_channel_cb(struct qeth_card * card,struct qeth_cmd_buffer * iob,unsigned int data_length)2157 static void qeth_idx_activate_read_channel_cb(struct qeth_card *card,
2158 struct qeth_cmd_buffer *iob,
2159 unsigned int data_length)
2160 {
2161 struct qeth_channel *channel = iob->channel;
2162 u16 peer_level;
2163 int rc;
2164
2165 QETH_CARD_TEXT(card, 2, "idxrdcb");
2166
2167 rc = qeth_idx_check_activate_response(card, channel, iob);
2168 if (rc)
2169 goto out;
2170
2171 memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2172 if (peer_level != qeth_peer_func_level(card->info.func_level)) {
2173 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
2174 CCW_DEVID(channel->ccwdev),
2175 card->info.func_level, peer_level);
2176 rc = -EINVAL;
2177 goto out;
2178 }
2179
2180 memcpy(&card->token.issuer_rm_r,
2181 QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2182 QETH_MPC_TOKEN_LENGTH);
2183 memcpy(&card->info.mcl_level[0],
2184 QETH_IDX_REPLY_LEVEL(iob->data), QETH_MCL_LENGTH);
2185
2186 out:
2187 qeth_notify_cmd(iob, rc);
2188 qeth_put_cmd(iob);
2189 }
2190
qeth_idx_activate_write_channel_cb(struct qeth_card * card,struct qeth_cmd_buffer * iob,unsigned int data_length)2191 static void qeth_idx_activate_write_channel_cb(struct qeth_card *card,
2192 struct qeth_cmd_buffer *iob,
2193 unsigned int data_length)
2194 {
2195 struct qeth_channel *channel = iob->channel;
2196 u16 peer_level;
2197 int rc;
2198
2199 QETH_CARD_TEXT(card, 2, "idxwrcb");
2200
2201 rc = qeth_idx_check_activate_response(card, channel, iob);
2202 if (rc)
2203 goto out;
2204
2205 memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2206 if ((peer_level & ~0x0100) !=
2207 qeth_peer_func_level(card->info.func_level)) {
2208 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
2209 CCW_DEVID(channel->ccwdev),
2210 card->info.func_level, peer_level);
2211 rc = -EINVAL;
2212 }
2213
2214 out:
2215 qeth_notify_cmd(iob, rc);
2216 qeth_put_cmd(iob);
2217 }
2218
qeth_idx_setup_activate_cmd(struct qeth_card * card,struct qeth_cmd_buffer * iob)2219 static void qeth_idx_setup_activate_cmd(struct qeth_card *card,
2220 struct qeth_cmd_buffer *iob)
2221 {
2222 u16 addr = (card->info.cula << 8) + card->info.unit_addr2;
2223 u8 port = ((u8)card->dev->dev_port) | 0x80;
2224 struct ccw1 *ccw = __ccw_from_cmd(iob);
2225
2226 qeth_setup_ccw(&ccw[0], CCW_CMD_WRITE, CCW_FLAG_CC, IDX_ACTIVATE_SIZE,
2227 iob->data);
2228 qeth_setup_ccw(&ccw[1], CCW_CMD_READ, 0, iob->length, iob->data);
2229 iob->finalize = qeth_idx_finalize_cmd;
2230
2231 port |= QETH_IDX_ACT_INVAL_FRAME;
2232 memcpy(QETH_IDX_ACT_PNO(iob->data), &port, 1);
2233 memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2234 &card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH);
2235 memcpy(QETH_IDX_ACT_FUNC_LEVEL(iob->data),
2236 &card->info.func_level, 2);
2237 memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &card->info.ddev_devno, 2);
2238 memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &addr, 2);
2239 }
2240
qeth_idx_activate_read_channel(struct qeth_card * card)2241 static int qeth_idx_activate_read_channel(struct qeth_card *card)
2242 {
2243 struct qeth_channel *channel = &card->read;
2244 struct qeth_cmd_buffer *iob;
2245 int rc;
2246
2247 QETH_CARD_TEXT(card, 2, "idxread");
2248
2249 iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
2250 if (!iob)
2251 return -ENOMEM;
2252
2253 memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE);
2254 qeth_idx_setup_activate_cmd(card, iob);
2255 iob->callback = qeth_idx_activate_read_channel_cb;
2256
2257 rc = qeth_send_control_data(card, iob, NULL, NULL);
2258 if (rc)
2259 return rc;
2260
2261 channel->state = CH_STATE_UP;
2262 return 0;
2263 }
2264
qeth_idx_activate_write_channel(struct qeth_card * card)2265 static int qeth_idx_activate_write_channel(struct qeth_card *card)
2266 {
2267 struct qeth_channel *channel = &card->write;
2268 struct qeth_cmd_buffer *iob;
2269 int rc;
2270
2271 QETH_CARD_TEXT(card, 2, "idxwrite");
2272
2273 iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
2274 if (!iob)
2275 return -ENOMEM;
2276
2277 memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE);
2278 qeth_idx_setup_activate_cmd(card, iob);
2279 iob->callback = qeth_idx_activate_write_channel_cb;
2280
2281 rc = qeth_send_control_data(card, iob, NULL, NULL);
2282 if (rc)
2283 return rc;
2284
2285 channel->state = CH_STATE_UP;
2286 return 0;
2287 }
2288
qeth_cm_enable_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)2289 static int qeth_cm_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2290 unsigned long data)
2291 {
2292 struct qeth_cmd_buffer *iob;
2293
2294 QETH_CARD_TEXT(card, 2, "cmenblcb");
2295
2296 iob = (struct qeth_cmd_buffer *) data;
2297 memcpy(&card->token.cm_filter_r,
2298 QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data),
2299 QETH_MPC_TOKEN_LENGTH);
2300 return 0;
2301 }
2302
qeth_cm_enable(struct qeth_card * card)2303 static int qeth_cm_enable(struct qeth_card *card)
2304 {
2305 struct qeth_cmd_buffer *iob;
2306
2307 QETH_CARD_TEXT(card, 2, "cmenable");
2308
2309 iob = qeth_mpc_alloc_cmd(card, CM_ENABLE, CM_ENABLE_SIZE);
2310 if (!iob)
2311 return -ENOMEM;
2312
2313 memcpy(QETH_CM_ENABLE_ISSUER_RM_TOKEN(iob->data),
2314 &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2315 memcpy(QETH_CM_ENABLE_FILTER_TOKEN(iob->data),
2316 &card->token.cm_filter_w, QETH_MPC_TOKEN_LENGTH);
2317
2318 return qeth_send_control_data(card, iob, qeth_cm_enable_cb, NULL);
2319 }
2320
qeth_cm_setup_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)2321 static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2322 unsigned long data)
2323 {
2324 struct qeth_cmd_buffer *iob;
2325
2326 QETH_CARD_TEXT(card, 2, "cmsetpcb");
2327
2328 iob = (struct qeth_cmd_buffer *) data;
2329 memcpy(&card->token.cm_connection_r,
2330 QETH_CM_SETUP_RESP_DEST_ADDR(iob->data),
2331 QETH_MPC_TOKEN_LENGTH);
2332 return 0;
2333 }
2334
qeth_cm_setup(struct qeth_card * card)2335 static int qeth_cm_setup(struct qeth_card *card)
2336 {
2337 struct qeth_cmd_buffer *iob;
2338
2339 QETH_CARD_TEXT(card, 2, "cmsetup");
2340
2341 iob = qeth_mpc_alloc_cmd(card, CM_SETUP, CM_SETUP_SIZE);
2342 if (!iob)
2343 return -ENOMEM;
2344
2345 memcpy(QETH_CM_SETUP_DEST_ADDR(iob->data),
2346 &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2347 memcpy(QETH_CM_SETUP_CONNECTION_TOKEN(iob->data),
2348 &card->token.cm_connection_w, QETH_MPC_TOKEN_LENGTH);
2349 memcpy(QETH_CM_SETUP_FILTER_TOKEN(iob->data),
2350 &card->token.cm_filter_r, QETH_MPC_TOKEN_LENGTH);
2351 return qeth_send_control_data(card, iob, qeth_cm_setup_cb, NULL);
2352 }
2353
qeth_is_supported_link_type(struct qeth_card * card,u8 link_type)2354 static bool qeth_is_supported_link_type(struct qeth_card *card, u8 link_type)
2355 {
2356 if (link_type == QETH_LINK_TYPE_LANE_TR ||
2357 link_type == QETH_LINK_TYPE_HSTR) {
2358 dev_err(&card->gdev->dev, "Unsupported Token Ring device\n");
2359 return false;
2360 }
2361
2362 return true;
2363 }
2364
qeth_update_max_mtu(struct qeth_card * card,unsigned int max_mtu)2365 static int qeth_update_max_mtu(struct qeth_card *card, unsigned int max_mtu)
2366 {
2367 struct net_device *dev = card->dev;
2368 unsigned int new_mtu;
2369
2370 if (!max_mtu) {
2371 /* IQD needs accurate max MTU to set up its RX buffers: */
2372 if (IS_IQD(card))
2373 return -EINVAL;
2374 /* tolerate quirky HW: */
2375 max_mtu = ETH_MAX_MTU;
2376 }
2377
2378 rtnl_lock();
2379 if (IS_IQD(card)) {
2380 /* move any device with default MTU to new max MTU: */
2381 new_mtu = (dev->mtu == dev->max_mtu) ? max_mtu : dev->mtu;
2382
2383 /* adjust RX buffer size to new max MTU: */
2384 card->qdio.in_buf_size = max_mtu + 2 * PAGE_SIZE;
2385 if (dev->max_mtu && dev->max_mtu != max_mtu)
2386 qeth_free_qdio_queues(card);
2387 } else {
2388 if (dev->mtu)
2389 new_mtu = dev->mtu;
2390 /* default MTUs for first setup: */
2391 else if (IS_LAYER2(card))
2392 new_mtu = ETH_DATA_LEN;
2393 else
2394 new_mtu = ETH_DATA_LEN - 8; /* allow for LLC + SNAP */
2395 }
2396
2397 dev->max_mtu = max_mtu;
2398 dev->mtu = min(new_mtu, max_mtu);
2399 rtnl_unlock();
2400 return 0;
2401 }
2402
qeth_get_mtu_outof_framesize(int framesize)2403 static int qeth_get_mtu_outof_framesize(int framesize)
2404 {
2405 switch (framesize) {
2406 case 0x4000:
2407 return 8192;
2408 case 0x6000:
2409 return 16384;
2410 case 0xa000:
2411 return 32768;
2412 case 0xffff:
2413 return 57344;
2414 default:
2415 return 0;
2416 }
2417 }
2418
qeth_ulp_enable_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)2419 static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2420 unsigned long data)
2421 {
2422 __u16 mtu, framesize;
2423 __u16 len;
2424 struct qeth_cmd_buffer *iob;
2425 u8 link_type = 0;
2426
2427 QETH_CARD_TEXT(card, 2, "ulpenacb");
2428
2429 iob = (struct qeth_cmd_buffer *) data;
2430 memcpy(&card->token.ulp_filter_r,
2431 QETH_ULP_ENABLE_RESP_FILTER_TOKEN(iob->data),
2432 QETH_MPC_TOKEN_LENGTH);
2433 if (IS_IQD(card)) {
2434 memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2);
2435 mtu = qeth_get_mtu_outof_framesize(framesize);
2436 } else {
2437 mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data);
2438 }
2439 *(u16 *)reply->param = mtu;
2440
2441 memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2);
2442 if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) {
2443 memcpy(&link_type,
2444 QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1);
2445 if (!qeth_is_supported_link_type(card, link_type))
2446 return -EPROTONOSUPPORT;
2447 }
2448
2449 card->info.link_type = link_type;
2450 QETH_CARD_TEXT_(card, 2, "link%d", card->info.link_type);
2451 return 0;
2452 }
2453
qeth_mpc_select_prot_type(struct qeth_card * card)2454 static u8 qeth_mpc_select_prot_type(struct qeth_card *card)
2455 {
2456 return IS_LAYER2(card) ? QETH_MPC_PROT_L2 : QETH_MPC_PROT_L3;
2457 }
2458
qeth_ulp_enable(struct qeth_card * card)2459 static int qeth_ulp_enable(struct qeth_card *card)
2460 {
2461 u8 prot_type = qeth_mpc_select_prot_type(card);
2462 struct qeth_cmd_buffer *iob;
2463 u16 max_mtu;
2464 int rc;
2465
2466 QETH_CARD_TEXT(card, 2, "ulpenabl");
2467
2468 iob = qeth_mpc_alloc_cmd(card, ULP_ENABLE, ULP_ENABLE_SIZE);
2469 if (!iob)
2470 return -ENOMEM;
2471
2472 *(QETH_ULP_ENABLE_LINKNUM(iob->data)) = (u8) card->dev->dev_port;
2473 memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1);
2474 memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data),
2475 &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2476 memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data),
2477 &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH);
2478 rc = qeth_send_control_data(card, iob, qeth_ulp_enable_cb, &max_mtu);
2479 if (rc)
2480 return rc;
2481 return qeth_update_max_mtu(card, max_mtu);
2482 }
2483
qeth_ulp_setup_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)2484 static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2485 unsigned long data)
2486 {
2487 struct qeth_cmd_buffer *iob;
2488
2489 QETH_CARD_TEXT(card, 2, "ulpstpcb");
2490
2491 iob = (struct qeth_cmd_buffer *) data;
2492 memcpy(&card->token.ulp_connection_r,
2493 QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2494 QETH_MPC_TOKEN_LENGTH);
2495 if (!strncmp("00S", QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2496 3)) {
2497 QETH_CARD_TEXT(card, 2, "olmlimit");
2498 dev_err(&card->gdev->dev, "A connection could not be "
2499 "established because of an OLM limit\n");
2500 return -EMLINK;
2501 }
2502 return 0;
2503 }
2504
qeth_ulp_setup(struct qeth_card * card)2505 static int qeth_ulp_setup(struct qeth_card *card)
2506 {
2507 __u16 temp;
2508 struct qeth_cmd_buffer *iob;
2509
2510 QETH_CARD_TEXT(card, 2, "ulpsetup");
2511
2512 iob = qeth_mpc_alloc_cmd(card, ULP_SETUP, ULP_SETUP_SIZE);
2513 if (!iob)
2514 return -ENOMEM;
2515
2516 memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data),
2517 &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2518 memcpy(QETH_ULP_SETUP_CONNECTION_TOKEN(iob->data),
2519 &card->token.ulp_connection_w, QETH_MPC_TOKEN_LENGTH);
2520 memcpy(QETH_ULP_SETUP_FILTER_TOKEN(iob->data),
2521 &card->token.ulp_filter_r, QETH_MPC_TOKEN_LENGTH);
2522
2523 memcpy(QETH_ULP_SETUP_CUA(iob->data), &card->info.ddev_devno, 2);
2524 temp = (card->info.cula << 8) + card->info.unit_addr2;
2525 memcpy(QETH_ULP_SETUP_REAL_DEVADDR(iob->data), &temp, 2);
2526 return qeth_send_control_data(card, iob, qeth_ulp_setup_cb, NULL);
2527 }
2528
qeth_alloc_out_buf(struct qeth_qdio_out_q * q,unsigned int bidx,gfp_t gfp)2529 static int qeth_alloc_out_buf(struct qeth_qdio_out_q *q, unsigned int bidx,
2530 gfp_t gfp)
2531 {
2532 struct qeth_qdio_out_buffer *newbuf;
2533
2534 newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, gfp);
2535 if (!newbuf)
2536 return -ENOMEM;
2537
2538 newbuf->buffer = q->qdio_bufs[bidx];
2539 skb_queue_head_init(&newbuf->skb_list);
2540 lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key);
2541 atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY);
2542 q->bufs[bidx] = newbuf;
2543 return 0;
2544 }
2545
qeth_free_output_queue(struct qeth_qdio_out_q * q)2546 static void qeth_free_output_queue(struct qeth_qdio_out_q *q)
2547 {
2548 if (!q)
2549 return;
2550
2551 qeth_drain_output_queue(q, true);
2552 qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2553 kfree(q);
2554 }
2555
qeth_alloc_output_queue(void)2556 static struct qeth_qdio_out_q *qeth_alloc_output_queue(void)
2557 {
2558 struct qeth_qdio_out_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
2559 unsigned int i;
2560
2561 if (!q)
2562 return NULL;
2563
2564 if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q))
2565 goto err_qdio_bufs;
2566
2567 for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) {
2568 if (qeth_alloc_out_buf(q, i, GFP_KERNEL))
2569 goto err_out_bufs;
2570 }
2571
2572 return q;
2573
2574 err_out_bufs:
2575 while (i > 0)
2576 qeth_free_out_buf(q->bufs[--i]);
2577 qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2578 err_qdio_bufs:
2579 kfree(q);
2580 return NULL;
2581 }
2582
qeth_tx_completion_timer(struct timer_list * timer)2583 static void qeth_tx_completion_timer(struct timer_list *timer)
2584 {
2585 struct qeth_qdio_out_q *queue = from_timer(queue, timer, timer);
2586
2587 napi_schedule(&queue->napi);
2588 QETH_TXQ_STAT_INC(queue, completion_timer);
2589 }
2590
qeth_alloc_qdio_queues(struct qeth_card * card)2591 static int qeth_alloc_qdio_queues(struct qeth_card *card)
2592 {
2593 unsigned int i;
2594
2595 QETH_CARD_TEXT(card, 2, "allcqdbf");
2596
2597 if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED,
2598 QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED)
2599 return 0;
2600
2601 /* inbound buffer pool */
2602 if (qeth_alloc_buffer_pool(card))
2603 goto out_buffer_pool;
2604
2605 /* outbound */
2606 for (i = 0; i < card->qdio.no_out_queues; ++i) {
2607 struct qeth_qdio_out_q *queue;
2608
2609 queue = qeth_alloc_output_queue();
2610 if (!queue)
2611 goto out_freeoutq;
2612 QETH_CARD_TEXT_(card, 2, "outq %i", i);
2613 QETH_CARD_HEX(card, 2, &queue, sizeof(void *));
2614 card->qdio.out_qs[i] = queue;
2615 queue->card = card;
2616 queue->queue_no = i;
2617 INIT_LIST_HEAD(&queue->pending_bufs);
2618 spin_lock_init(&queue->lock);
2619 timer_setup(&queue->timer, qeth_tx_completion_timer, 0);
2620 if (IS_IQD(card)) {
2621 queue->coalesce_usecs = QETH_TX_COALESCE_USECS;
2622 queue->max_coalesced_frames = QETH_TX_MAX_COALESCED_FRAMES;
2623 queue->rescan_usecs = QETH_TX_TIMER_USECS;
2624 } else {
2625 queue->coalesce_usecs = USEC_PER_SEC;
2626 queue->max_coalesced_frames = 0;
2627 queue->rescan_usecs = 10 * USEC_PER_SEC;
2628 }
2629 queue->priority = QETH_QIB_PQUE_PRIO_DEFAULT;
2630 }
2631
2632 /* completion */
2633 if (qeth_alloc_cq(card))
2634 goto out_freeoutq;
2635
2636 return 0;
2637
2638 out_freeoutq:
2639 while (i > 0) {
2640 qeth_free_output_queue(card->qdio.out_qs[--i]);
2641 card->qdio.out_qs[i] = NULL;
2642 }
2643 qeth_free_buffer_pool(card);
2644 out_buffer_pool:
2645 atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
2646 return -ENOMEM;
2647 }
2648
qeth_free_qdio_queues(struct qeth_card * card)2649 static void qeth_free_qdio_queues(struct qeth_card *card)
2650 {
2651 int i, j;
2652
2653 if (atomic_xchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED) ==
2654 QETH_QDIO_UNINITIALIZED)
2655 return;
2656
2657 qeth_free_cq(card);
2658 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2659 if (card->qdio.in_q->bufs[j].rx_skb) {
2660 consume_skb(card->qdio.in_q->bufs[j].rx_skb);
2661 card->qdio.in_q->bufs[j].rx_skb = NULL;
2662 }
2663 }
2664
2665 /* inbound buffer pool */
2666 qeth_free_buffer_pool(card);
2667 /* free outbound qdio_qs */
2668 for (i = 0; i < card->qdio.no_out_queues; i++) {
2669 qeth_free_output_queue(card->qdio.out_qs[i]);
2670 card->qdio.out_qs[i] = NULL;
2671 }
2672 }
2673
qeth_fill_qib_parms(struct qeth_card * card,struct qeth_qib_parms * parms)2674 static void qeth_fill_qib_parms(struct qeth_card *card,
2675 struct qeth_qib_parms *parms)
2676 {
2677 struct qeth_qdio_out_q *queue;
2678 unsigned int i;
2679
2680 parms->pcit_magic[0] = 'P';
2681 parms->pcit_magic[1] = 'C';
2682 parms->pcit_magic[2] = 'I';
2683 parms->pcit_magic[3] = 'T';
2684 ASCEBC(parms->pcit_magic, sizeof(parms->pcit_magic));
2685 parms->pcit_a = QETH_PCI_THRESHOLD_A(card);
2686 parms->pcit_b = QETH_PCI_THRESHOLD_B(card);
2687 parms->pcit_c = QETH_PCI_TIMER_VALUE(card);
2688
2689 parms->blkt_magic[0] = 'B';
2690 parms->blkt_magic[1] = 'L';
2691 parms->blkt_magic[2] = 'K';
2692 parms->blkt_magic[3] = 'T';
2693 ASCEBC(parms->blkt_magic, sizeof(parms->blkt_magic));
2694 parms->blkt_total = card->info.blkt.time_total;
2695 parms->blkt_inter_packet = card->info.blkt.inter_packet;
2696 parms->blkt_inter_packet_jumbo = card->info.blkt.inter_packet_jumbo;
2697
2698 /* Prio-queueing implicitly uses the default priorities: */
2699 if (qeth_uses_tx_prio_queueing(card) || card->qdio.no_out_queues == 1)
2700 return;
2701
2702 parms->pque_magic[0] = 'P';
2703 parms->pque_magic[1] = 'Q';
2704 parms->pque_magic[2] = 'U';
2705 parms->pque_magic[3] = 'E';
2706 ASCEBC(parms->pque_magic, sizeof(parms->pque_magic));
2707 parms->pque_order = QETH_QIB_PQUE_ORDER_RR;
2708 parms->pque_units = QETH_QIB_PQUE_UNITS_SBAL;
2709
2710 qeth_for_each_output_queue(card, queue, i)
2711 parms->pque_priority[i] = queue->priority;
2712 }
2713
qeth_qdio_activate(struct qeth_card * card)2714 static int qeth_qdio_activate(struct qeth_card *card)
2715 {
2716 QETH_CARD_TEXT(card, 3, "qdioact");
2717 return qdio_activate(CARD_DDEV(card));
2718 }
2719
qeth_dm_act(struct qeth_card * card)2720 static int qeth_dm_act(struct qeth_card *card)
2721 {
2722 struct qeth_cmd_buffer *iob;
2723
2724 QETH_CARD_TEXT(card, 2, "dmact");
2725
2726 iob = qeth_mpc_alloc_cmd(card, DM_ACT, DM_ACT_SIZE);
2727 if (!iob)
2728 return -ENOMEM;
2729
2730 memcpy(QETH_DM_ACT_DEST_ADDR(iob->data),
2731 &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2732 memcpy(QETH_DM_ACT_CONNECTION_TOKEN(iob->data),
2733 &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2734 return qeth_send_control_data(card, iob, NULL, NULL);
2735 }
2736
qeth_mpc_initialize(struct qeth_card * card)2737 static int qeth_mpc_initialize(struct qeth_card *card)
2738 {
2739 int rc;
2740
2741 QETH_CARD_TEXT(card, 2, "mpcinit");
2742
2743 rc = qeth_issue_next_read(card);
2744 if (rc) {
2745 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
2746 return rc;
2747 }
2748 rc = qeth_cm_enable(card);
2749 if (rc) {
2750 QETH_CARD_TEXT_(card, 2, "2err%d", rc);
2751 return rc;
2752 }
2753 rc = qeth_cm_setup(card);
2754 if (rc) {
2755 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
2756 return rc;
2757 }
2758 rc = qeth_ulp_enable(card);
2759 if (rc) {
2760 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
2761 return rc;
2762 }
2763 rc = qeth_ulp_setup(card);
2764 if (rc) {
2765 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2766 return rc;
2767 }
2768 rc = qeth_alloc_qdio_queues(card);
2769 if (rc) {
2770 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2771 return rc;
2772 }
2773 rc = qeth_qdio_establish(card);
2774 if (rc) {
2775 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
2776 qeth_free_qdio_queues(card);
2777 return rc;
2778 }
2779 rc = qeth_qdio_activate(card);
2780 if (rc) {
2781 QETH_CARD_TEXT_(card, 2, "7err%d", rc);
2782 return rc;
2783 }
2784 rc = qeth_dm_act(card);
2785 if (rc) {
2786 QETH_CARD_TEXT_(card, 2, "8err%d", rc);
2787 return rc;
2788 }
2789
2790 return 0;
2791 }
2792
qeth_print_status_message(struct qeth_card * card)2793 static void qeth_print_status_message(struct qeth_card *card)
2794 {
2795 switch (card->info.type) {
2796 case QETH_CARD_TYPE_OSD:
2797 case QETH_CARD_TYPE_OSM:
2798 case QETH_CARD_TYPE_OSX:
2799 /* VM will use a non-zero first character
2800 * to indicate a HiperSockets like reporting
2801 * of the level OSA sets the first character to zero
2802 * */
2803 if (!card->info.mcl_level[0]) {
2804 sprintf(card->info.mcl_level, "%02x%02x",
2805 card->info.mcl_level[2],
2806 card->info.mcl_level[3]);
2807 break;
2808 }
2809 fallthrough;
2810 case QETH_CARD_TYPE_IQD:
2811 if (IS_VM_NIC(card) || (card->info.mcl_level[0] & 0x80)) {
2812 card->info.mcl_level[0] = (char) _ebcasc[(__u8)
2813 card->info.mcl_level[0]];
2814 card->info.mcl_level[1] = (char) _ebcasc[(__u8)
2815 card->info.mcl_level[1]];
2816 card->info.mcl_level[2] = (char) _ebcasc[(__u8)
2817 card->info.mcl_level[2]];
2818 card->info.mcl_level[3] = (char) _ebcasc[(__u8)
2819 card->info.mcl_level[3]];
2820 card->info.mcl_level[QETH_MCL_LENGTH] = 0;
2821 }
2822 break;
2823 default:
2824 memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1);
2825 }
2826 dev_info(&card->gdev->dev,
2827 "Device is a%s card%s%s%s\nwith link type %s.\n",
2828 qeth_get_cardname(card),
2829 (card->info.mcl_level[0]) ? " (level: " : "",
2830 (card->info.mcl_level[0]) ? card->info.mcl_level : "",
2831 (card->info.mcl_level[0]) ? ")" : "",
2832 qeth_get_cardname_short(card));
2833 }
2834
qeth_initialize_working_pool_list(struct qeth_card * card)2835 static void qeth_initialize_working_pool_list(struct qeth_card *card)
2836 {
2837 struct qeth_buffer_pool_entry *entry;
2838
2839 QETH_CARD_TEXT(card, 5, "inwrklst");
2840
2841 list_for_each_entry(entry,
2842 &card->qdio.init_pool.entry_list, init_list) {
2843 qeth_put_buffer_pool_entry(card, entry);
2844 }
2845 }
2846
qeth_find_free_buffer_pool_entry(struct qeth_card * card)2847 static struct qeth_buffer_pool_entry *qeth_find_free_buffer_pool_entry(
2848 struct qeth_card *card)
2849 {
2850 struct qeth_buffer_pool_entry *entry;
2851 int i, free;
2852
2853 if (list_empty(&card->qdio.in_buf_pool.entry_list))
2854 return NULL;
2855
2856 list_for_each_entry(entry, &card->qdio.in_buf_pool.entry_list, list) {
2857 free = 1;
2858 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2859 if (page_count(entry->elements[i]) > 1) {
2860 free = 0;
2861 break;
2862 }
2863 }
2864 if (free) {
2865 list_del_init(&entry->list);
2866 return entry;
2867 }
2868 }
2869
2870 /* no free buffer in pool so take first one and swap pages */
2871 entry = list_first_entry(&card->qdio.in_buf_pool.entry_list,
2872 struct qeth_buffer_pool_entry, list);
2873 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2874 if (page_count(entry->elements[i]) > 1) {
2875 struct page *page = dev_alloc_page();
2876
2877 if (!page)
2878 return NULL;
2879
2880 __free_page(entry->elements[i]);
2881 entry->elements[i] = page;
2882 QETH_CARD_STAT_INC(card, rx_sg_alloc_page);
2883 }
2884 }
2885 list_del_init(&entry->list);
2886 return entry;
2887 }
2888
qeth_init_input_buffer(struct qeth_card * card,struct qeth_qdio_buffer * buf)2889 static int qeth_init_input_buffer(struct qeth_card *card,
2890 struct qeth_qdio_buffer *buf)
2891 {
2892 struct qeth_buffer_pool_entry *pool_entry = buf->pool_entry;
2893 int i;
2894
2895 if ((card->options.cq == QETH_CQ_ENABLED) && (!buf->rx_skb)) {
2896 buf->rx_skb = netdev_alloc_skb(card->dev,
2897 ETH_HLEN +
2898 sizeof(struct ipv6hdr));
2899 if (!buf->rx_skb)
2900 return -ENOMEM;
2901 }
2902
2903 if (!pool_entry) {
2904 pool_entry = qeth_find_free_buffer_pool_entry(card);
2905 if (!pool_entry)
2906 return -ENOBUFS;
2907
2908 buf->pool_entry = pool_entry;
2909 }
2910
2911 /*
2912 * since the buffer is accessed only from the input_tasklet
2913 * there shouldn't be a need to synchronize; also, since we use
2914 * the QETH_IN_BUF_REQUEUE_THRESHOLD we should never run out off
2915 * buffers
2916 */
2917 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2918 buf->buffer->element[i].length = PAGE_SIZE;
2919 buf->buffer->element[i].addr =
2920 page_to_phys(pool_entry->elements[i]);
2921 if (i == QETH_MAX_BUFFER_ELEMENTS(card) - 1)
2922 buf->buffer->element[i].eflags = SBAL_EFLAGS_LAST_ENTRY;
2923 else
2924 buf->buffer->element[i].eflags = 0;
2925 buf->buffer->element[i].sflags = 0;
2926 }
2927 return 0;
2928 }
2929
qeth_tx_select_bulk_max(struct qeth_card * card,struct qeth_qdio_out_q * queue)2930 static unsigned int qeth_tx_select_bulk_max(struct qeth_card *card,
2931 struct qeth_qdio_out_q *queue)
2932 {
2933 if (!IS_IQD(card) ||
2934 qeth_iqd_is_mcast_queue(card, queue) ||
2935 card->options.cq == QETH_CQ_ENABLED ||
2936 qdio_get_ssqd_desc(CARD_DDEV(card), &card->ssqd))
2937 return 1;
2938
2939 return card->ssqd.mmwc ? card->ssqd.mmwc : 1;
2940 }
2941
qeth_init_qdio_queues(struct qeth_card * card)2942 static int qeth_init_qdio_queues(struct qeth_card *card)
2943 {
2944 unsigned int rx_bufs = card->qdio.in_buf_pool.buf_count;
2945 unsigned int i;
2946 int rc;
2947
2948 QETH_CARD_TEXT(card, 2, "initqdqs");
2949
2950 /* inbound queue */
2951 qdio_reset_buffers(card->qdio.in_q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2952 memset(&card->rx, 0, sizeof(struct qeth_rx));
2953
2954 qeth_initialize_working_pool_list(card);
2955 /*give only as many buffers to hardware as we have buffer pool entries*/
2956 for (i = 0; i < rx_bufs; i++) {
2957 rc = qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]);
2958 if (rc)
2959 return rc;
2960 }
2961
2962 card->qdio.in_q->next_buf_to_init = QDIO_BUFNR(rx_bufs);
2963 rc = qdio_add_bufs_to_input_queue(CARD_DDEV(card), 0, 0, rx_bufs);
2964 if (rc) {
2965 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
2966 return rc;
2967 }
2968
2969 /* completion */
2970 rc = qeth_cq_init(card);
2971 if (rc) {
2972 return rc;
2973 }
2974
2975 /* outbound queue */
2976 for (i = 0; i < card->qdio.no_out_queues; ++i) {
2977 struct qeth_qdio_out_q *queue = card->qdio.out_qs[i];
2978
2979 qdio_reset_buffers(queue->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2980 queue->max_elements = QETH_MAX_BUFFER_ELEMENTS(card);
2981 queue->next_buf_to_fill = 0;
2982 queue->do_pack = 0;
2983 queue->prev_hdr = NULL;
2984 queue->coalesced_frames = 0;
2985 queue->bulk_start = 0;
2986 queue->bulk_count = 0;
2987 queue->bulk_max = qeth_tx_select_bulk_max(card, queue);
2988 atomic_set(&queue->used_buffers, 0);
2989 atomic_set(&queue->set_pci_flags_count, 0);
2990 netdev_tx_reset_queue(netdev_get_tx_queue(card->dev, i));
2991 }
2992 return 0;
2993 }
2994
qeth_ipa_finalize_cmd(struct qeth_card * card,struct qeth_cmd_buffer * iob)2995 static void qeth_ipa_finalize_cmd(struct qeth_card *card,
2996 struct qeth_cmd_buffer *iob)
2997 {
2998 qeth_mpc_finalize_cmd(card, iob);
2999
3000 /* override with IPA-specific values: */
3001 __ipa_cmd(iob)->hdr.seqno = card->seqno.ipa++;
3002 }
3003
qeth_prepare_ipa_cmd(struct qeth_card * card,struct qeth_cmd_buffer * iob,u16 cmd_length)3004 static void qeth_prepare_ipa_cmd(struct qeth_card *card,
3005 struct qeth_cmd_buffer *iob, u16 cmd_length)
3006 {
3007 u8 prot_type = qeth_mpc_select_prot_type(card);
3008 u16 total_length = iob->length;
3009
3010 qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, total_length,
3011 iob->data);
3012 iob->finalize = qeth_ipa_finalize_cmd;
3013
3014 memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
3015 memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &total_length, 2);
3016 memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1);
3017 memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &cmd_length, 2);
3018 memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &cmd_length, 2);
3019 memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
3020 &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
3021 memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &cmd_length, 2);
3022 }
3023
qeth_ipa_match_reply(struct qeth_cmd_buffer * iob,struct qeth_cmd_buffer * reply)3024 static bool qeth_ipa_match_reply(struct qeth_cmd_buffer *iob,
3025 struct qeth_cmd_buffer *reply)
3026 {
3027 struct qeth_ipa_cmd *ipa_reply = __ipa_reply(reply);
3028
3029 return ipa_reply && (__ipa_cmd(iob)->hdr.seqno == ipa_reply->hdr.seqno);
3030 }
3031
qeth_ipa_alloc_cmd(struct qeth_card * card,enum qeth_ipa_cmds cmd_code,enum qeth_prot_versions prot,unsigned int data_length)3032 struct qeth_cmd_buffer *qeth_ipa_alloc_cmd(struct qeth_card *card,
3033 enum qeth_ipa_cmds cmd_code,
3034 enum qeth_prot_versions prot,
3035 unsigned int data_length)
3036 {
3037 struct qeth_cmd_buffer *iob;
3038 struct qeth_ipacmd_hdr *hdr;
3039
3040 data_length += offsetof(struct qeth_ipa_cmd, data);
3041 iob = qeth_alloc_cmd(&card->write, IPA_PDU_HEADER_SIZE + data_length, 1,
3042 QETH_IPA_TIMEOUT);
3043 if (!iob)
3044 return NULL;
3045
3046 qeth_prepare_ipa_cmd(card, iob, data_length);
3047 iob->match = qeth_ipa_match_reply;
3048
3049 hdr = &__ipa_cmd(iob)->hdr;
3050 hdr->command = cmd_code;
3051 hdr->initiator = IPA_CMD_INITIATOR_HOST;
3052 /* hdr->seqno is set by qeth_send_control_data() */
3053 hdr->adapter_type = QETH_LINK_TYPE_FAST_ETH;
3054 hdr->rel_adapter_no = (u8) card->dev->dev_port;
3055 hdr->prim_version_no = IS_LAYER2(card) ? 2 : 1;
3056 hdr->param_count = 1;
3057 hdr->prot_version = prot;
3058 return iob;
3059 }
3060 EXPORT_SYMBOL_GPL(qeth_ipa_alloc_cmd);
3061
qeth_send_ipa_cmd_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)3062 static int qeth_send_ipa_cmd_cb(struct qeth_card *card,
3063 struct qeth_reply *reply, unsigned long data)
3064 {
3065 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3066
3067 return (cmd->hdr.return_code) ? -EIO : 0;
3068 }
3069
3070 /*
3071 * qeth_send_ipa_cmd() - send an IPA command
3072 *
3073 * See qeth_send_control_data() for explanation of the arguments.
3074 */
3075
qeth_send_ipa_cmd(struct qeth_card * card,struct qeth_cmd_buffer * iob,int (* reply_cb)(struct qeth_card *,struct qeth_reply *,unsigned long),void * reply_param)3076 int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
3077 int (*reply_cb)(struct qeth_card *, struct qeth_reply*,
3078 unsigned long),
3079 void *reply_param)
3080 {
3081 int rc;
3082
3083 QETH_CARD_TEXT(card, 4, "sendipa");
3084
3085 if (card->read_or_write_problem) {
3086 qeth_put_cmd(iob);
3087 return -EIO;
3088 }
3089
3090 if (reply_cb == NULL)
3091 reply_cb = qeth_send_ipa_cmd_cb;
3092 rc = qeth_send_control_data(card, iob, reply_cb, reply_param);
3093 if (rc == -ETIME) {
3094 qeth_clear_ipacmd_list(card);
3095 qeth_schedule_recovery(card);
3096 }
3097 return rc;
3098 }
3099 EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd);
3100
qeth_send_startlan_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)3101 static int qeth_send_startlan_cb(struct qeth_card *card,
3102 struct qeth_reply *reply, unsigned long data)
3103 {
3104 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3105
3106 if (cmd->hdr.return_code == IPA_RC_LAN_OFFLINE)
3107 return -ENETDOWN;
3108
3109 return (cmd->hdr.return_code) ? -EIO : 0;
3110 }
3111
qeth_send_startlan(struct qeth_card * card)3112 static int qeth_send_startlan(struct qeth_card *card)
3113 {
3114 struct qeth_cmd_buffer *iob;
3115
3116 QETH_CARD_TEXT(card, 2, "strtlan");
3117
3118 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_STARTLAN, QETH_PROT_NONE, 0);
3119 if (!iob)
3120 return -ENOMEM;
3121 return qeth_send_ipa_cmd(card, iob, qeth_send_startlan_cb, NULL);
3122 }
3123
qeth_setadpparms_inspect_rc(struct qeth_ipa_cmd * cmd)3124 static int qeth_setadpparms_inspect_rc(struct qeth_ipa_cmd *cmd)
3125 {
3126 if (!cmd->hdr.return_code)
3127 cmd->hdr.return_code =
3128 cmd->data.setadapterparms.hdr.return_code;
3129 return cmd->hdr.return_code;
3130 }
3131
qeth_query_setadapterparms_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)3132 static int qeth_query_setadapterparms_cb(struct qeth_card *card,
3133 struct qeth_reply *reply, unsigned long data)
3134 {
3135 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3136 struct qeth_query_cmds_supp *query_cmd;
3137
3138 QETH_CARD_TEXT(card, 3, "quyadpcb");
3139 if (qeth_setadpparms_inspect_rc(cmd))
3140 return -EIO;
3141
3142 query_cmd = &cmd->data.setadapterparms.data.query_cmds_supp;
3143 if (query_cmd->lan_type & 0x7f) {
3144 if (!qeth_is_supported_link_type(card, query_cmd->lan_type))
3145 return -EPROTONOSUPPORT;
3146
3147 card->info.link_type = query_cmd->lan_type;
3148 QETH_CARD_TEXT_(card, 2, "lnk %d", card->info.link_type);
3149 }
3150
3151 card->options.adp.supported = query_cmd->supported_cmds;
3152 return 0;
3153 }
3154
qeth_get_adapter_cmd(struct qeth_card * card,enum qeth_ipa_setadp_cmd adp_cmd,unsigned int data_length)3155 static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card,
3156 enum qeth_ipa_setadp_cmd adp_cmd,
3157 unsigned int data_length)
3158 {
3159 struct qeth_ipacmd_setadpparms_hdr *hdr;
3160 struct qeth_cmd_buffer *iob;
3161
3162 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETADAPTERPARMS, QETH_PROT_IPV4,
3163 data_length +
3164 offsetof(struct qeth_ipacmd_setadpparms,
3165 data));
3166 if (!iob)
3167 return NULL;
3168
3169 hdr = &__ipa_cmd(iob)->data.setadapterparms.hdr;
3170 hdr->cmdlength = sizeof(*hdr) + data_length;
3171 hdr->command_code = adp_cmd;
3172 hdr->used_total = 1;
3173 hdr->seq_no = 1;
3174 return iob;
3175 }
3176
qeth_query_setadapterparms(struct qeth_card * card)3177 static int qeth_query_setadapterparms(struct qeth_card *card)
3178 {
3179 int rc;
3180 struct qeth_cmd_buffer *iob;
3181
3182 QETH_CARD_TEXT(card, 3, "queryadp");
3183 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_COMMANDS_SUPPORTED,
3184 SETADP_DATA_SIZEOF(query_cmds_supp));
3185 if (!iob)
3186 return -ENOMEM;
3187 rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL);
3188 return rc;
3189 }
3190
qeth_query_ipassists_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)3191 static int qeth_query_ipassists_cb(struct qeth_card *card,
3192 struct qeth_reply *reply, unsigned long data)
3193 {
3194 struct qeth_ipa_cmd *cmd;
3195
3196 QETH_CARD_TEXT(card, 2, "qipasscb");
3197
3198 cmd = (struct qeth_ipa_cmd *) data;
3199
3200 switch (cmd->hdr.return_code) {
3201 case IPA_RC_SUCCESS:
3202 break;
3203 case IPA_RC_NOTSUPP:
3204 case IPA_RC_L2_UNSUPPORTED_CMD:
3205 QETH_CARD_TEXT(card, 2, "ipaunsup");
3206 card->options.ipa4.supported |= IPA_SETADAPTERPARMS;
3207 card->options.ipa6.supported |= IPA_SETADAPTERPARMS;
3208 return -EOPNOTSUPP;
3209 default:
3210 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Unhandled rc=%#x\n",
3211 CARD_DEVID(card), cmd->hdr.return_code);
3212 return -EIO;
3213 }
3214
3215 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
3216 card->options.ipa4 = cmd->hdr.assists;
3217 else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
3218 card->options.ipa6 = cmd->hdr.assists;
3219 else
3220 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Flawed LIC detected\n",
3221 CARD_DEVID(card));
3222 return 0;
3223 }
3224
qeth_query_ipassists(struct qeth_card * card,enum qeth_prot_versions prot)3225 static int qeth_query_ipassists(struct qeth_card *card,
3226 enum qeth_prot_versions prot)
3227 {
3228 int rc;
3229 struct qeth_cmd_buffer *iob;
3230
3231 QETH_CARD_TEXT_(card, 2, "qipassi%i", prot);
3232 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_QIPASSIST, prot, 0);
3233 if (!iob)
3234 return -ENOMEM;
3235 rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL);
3236 return rc;
3237 }
3238
qeth_query_switch_attributes_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)3239 static int qeth_query_switch_attributes_cb(struct qeth_card *card,
3240 struct qeth_reply *reply, unsigned long data)
3241 {
3242 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3243 struct qeth_query_switch_attributes *attrs;
3244 struct qeth_switch_info *sw_info;
3245
3246 QETH_CARD_TEXT(card, 2, "qswiatcb");
3247 if (qeth_setadpparms_inspect_rc(cmd))
3248 return -EIO;
3249
3250 sw_info = (struct qeth_switch_info *)reply->param;
3251 attrs = &cmd->data.setadapterparms.data.query_switch_attributes;
3252 sw_info->capabilities = attrs->capabilities;
3253 sw_info->settings = attrs->settings;
3254 QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities,
3255 sw_info->settings);
3256 return 0;
3257 }
3258
qeth_query_switch_attributes(struct qeth_card * card,struct qeth_switch_info * sw_info)3259 int qeth_query_switch_attributes(struct qeth_card *card,
3260 struct qeth_switch_info *sw_info)
3261 {
3262 struct qeth_cmd_buffer *iob;
3263
3264 QETH_CARD_TEXT(card, 2, "qswiattr");
3265 if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES))
3266 return -EOPNOTSUPP;
3267 if (!netif_carrier_ok(card->dev))
3268 return -ENOMEDIUM;
3269 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES, 0);
3270 if (!iob)
3271 return -ENOMEM;
3272 return qeth_send_ipa_cmd(card, iob,
3273 qeth_query_switch_attributes_cb, sw_info);
3274 }
3275
qeth_get_diag_cmd(struct qeth_card * card,enum qeth_diags_cmds sub_cmd,unsigned int data_length)3276 struct qeth_cmd_buffer *qeth_get_diag_cmd(struct qeth_card *card,
3277 enum qeth_diags_cmds sub_cmd,
3278 unsigned int data_length)
3279 {
3280 struct qeth_ipacmd_diagass *cmd;
3281 struct qeth_cmd_buffer *iob;
3282
3283 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SET_DIAG_ASS, QETH_PROT_NONE,
3284 DIAG_HDR_LEN + data_length);
3285 if (!iob)
3286 return NULL;
3287
3288 cmd = &__ipa_cmd(iob)->data.diagass;
3289 cmd->subcmd_len = DIAG_SUB_HDR_LEN + data_length;
3290 cmd->subcmd = sub_cmd;
3291 return iob;
3292 }
3293 EXPORT_SYMBOL_GPL(qeth_get_diag_cmd);
3294
qeth_query_setdiagass_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)3295 static int qeth_query_setdiagass_cb(struct qeth_card *card,
3296 struct qeth_reply *reply, unsigned long data)
3297 {
3298 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3299 u16 rc = cmd->hdr.return_code;
3300
3301 if (rc) {
3302 QETH_CARD_TEXT_(card, 2, "diagq:%x", rc);
3303 return -EIO;
3304 }
3305
3306 card->info.diagass_support = cmd->data.diagass.ext;
3307 return 0;
3308 }
3309
qeth_query_setdiagass(struct qeth_card * card)3310 static int qeth_query_setdiagass(struct qeth_card *card)
3311 {
3312 struct qeth_cmd_buffer *iob;
3313
3314 QETH_CARD_TEXT(card, 2, "qdiagass");
3315 iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_QUERY, 0);
3316 if (!iob)
3317 return -ENOMEM;
3318 return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL);
3319 }
3320
qeth_get_trap_id(struct qeth_card * card,struct qeth_trap_id * tid)3321 static void qeth_get_trap_id(struct qeth_card *card, struct qeth_trap_id *tid)
3322 {
3323 unsigned long info = get_zeroed_page(GFP_KERNEL);
3324 struct sysinfo_2_2_2 *info222 = (struct sysinfo_2_2_2 *)info;
3325 struct sysinfo_3_2_2 *info322 = (struct sysinfo_3_2_2 *)info;
3326 struct ccw_dev_id ccwid;
3327 int level;
3328
3329 tid->chpid = card->info.chpid;
3330 ccw_device_get_id(CARD_RDEV(card), &ccwid);
3331 tid->ssid = ccwid.ssid;
3332 tid->devno = ccwid.devno;
3333 if (!info)
3334 return;
3335 level = stsi(NULL, 0, 0, 0);
3336 if ((level >= 2) && (stsi(info222, 2, 2, 2) == 0))
3337 tid->lparnr = info222->lpar_number;
3338 if ((level >= 3) && (stsi(info322, 3, 2, 2) == 0)) {
3339 EBCASC(info322->vm[0].name, sizeof(info322->vm[0].name));
3340 memcpy(tid->vmname, info322->vm[0].name, sizeof(tid->vmname));
3341 }
3342 free_page(info);
3343 }
3344
qeth_hw_trap_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)3345 static int qeth_hw_trap_cb(struct qeth_card *card,
3346 struct qeth_reply *reply, unsigned long data)
3347 {
3348 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3349 u16 rc = cmd->hdr.return_code;
3350
3351 if (rc) {
3352 QETH_CARD_TEXT_(card, 2, "trapc:%x", rc);
3353 return -EIO;
3354 }
3355 return 0;
3356 }
3357
qeth_hw_trap(struct qeth_card * card,enum qeth_diags_trap_action action)3358 int qeth_hw_trap(struct qeth_card *card, enum qeth_diags_trap_action action)
3359 {
3360 struct qeth_cmd_buffer *iob;
3361 struct qeth_ipa_cmd *cmd;
3362
3363 QETH_CARD_TEXT(card, 2, "diagtrap");
3364 iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_TRAP, 64);
3365 if (!iob)
3366 return -ENOMEM;
3367 cmd = __ipa_cmd(iob);
3368 cmd->data.diagass.type = 1;
3369 cmd->data.diagass.action = action;
3370 switch (action) {
3371 case QETH_DIAGS_TRAP_ARM:
3372 cmd->data.diagass.options = 0x0003;
3373 cmd->data.diagass.ext = 0x00010000 +
3374 sizeof(struct qeth_trap_id);
3375 qeth_get_trap_id(card,
3376 (struct qeth_trap_id *)cmd->data.diagass.cdata);
3377 break;
3378 case QETH_DIAGS_TRAP_DISARM:
3379 cmd->data.diagass.options = 0x0001;
3380 break;
3381 case QETH_DIAGS_TRAP_CAPTURE:
3382 break;
3383 }
3384 return qeth_send_ipa_cmd(card, iob, qeth_hw_trap_cb, NULL);
3385 }
3386
qeth_check_qdio_errors(struct qeth_card * card,struct qdio_buffer * buf,unsigned int qdio_error,const char * dbftext)3387 static int qeth_check_qdio_errors(struct qeth_card *card,
3388 struct qdio_buffer *buf,
3389 unsigned int qdio_error,
3390 const char *dbftext)
3391 {
3392 if (qdio_error) {
3393 QETH_CARD_TEXT(card, 2, dbftext);
3394 QETH_CARD_TEXT_(card, 2, " F15=%02X",
3395 buf->element[15].sflags);
3396 QETH_CARD_TEXT_(card, 2, " F14=%02X",
3397 buf->element[14].sflags);
3398 QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error);
3399 if ((buf->element[15].sflags) == 0x12) {
3400 QETH_CARD_STAT_INC(card, rx_fifo_errors);
3401 return 0;
3402 } else
3403 return 1;
3404 }
3405 return 0;
3406 }
3407
qeth_rx_refill_queue(struct qeth_card * card,unsigned int count)3408 static unsigned int qeth_rx_refill_queue(struct qeth_card *card,
3409 unsigned int count)
3410 {
3411 struct qeth_qdio_q *queue = card->qdio.in_q;
3412 struct list_head *lh;
3413 int i;
3414 int rc;
3415 int newcount = 0;
3416
3417 /* only requeue at a certain threshold to avoid SIGAs */
3418 if (count >= QETH_IN_BUF_REQUEUE_THRESHOLD(card)) {
3419 for (i = queue->next_buf_to_init;
3420 i < queue->next_buf_to_init + count; ++i) {
3421 if (qeth_init_input_buffer(card,
3422 &queue->bufs[QDIO_BUFNR(i)])) {
3423 break;
3424 } else {
3425 newcount++;
3426 }
3427 }
3428
3429 if (newcount < count) {
3430 /* we are in memory shortage so we switch back to
3431 traditional skb allocation and drop packages */
3432 atomic_set(&card->force_alloc_skb, 3);
3433 count = newcount;
3434 } else {
3435 atomic_add_unless(&card->force_alloc_skb, -1, 0);
3436 }
3437
3438 if (!count) {
3439 i = 0;
3440 list_for_each(lh, &card->qdio.in_buf_pool.entry_list)
3441 i++;
3442 if (i == card->qdio.in_buf_pool.buf_count) {
3443 QETH_CARD_TEXT(card, 2, "qsarbw");
3444 schedule_delayed_work(
3445 &card->buffer_reclaim_work,
3446 QETH_RECLAIM_WORK_TIME);
3447 }
3448 return 0;
3449 }
3450
3451 rc = qdio_add_bufs_to_input_queue(CARD_DDEV(card), 0,
3452 queue->next_buf_to_init,
3453 count);
3454 if (rc) {
3455 QETH_CARD_TEXT(card, 2, "qinberr");
3456 }
3457 queue->next_buf_to_init = QDIO_BUFNR(queue->next_buf_to_init +
3458 count);
3459 return count;
3460 }
3461
3462 return 0;
3463 }
3464
qeth_buffer_reclaim_work(struct work_struct * work)3465 static void qeth_buffer_reclaim_work(struct work_struct *work)
3466 {
3467 struct qeth_card *card = container_of(to_delayed_work(work),
3468 struct qeth_card,
3469 buffer_reclaim_work);
3470
3471 local_bh_disable();
3472 napi_schedule(&card->napi);
3473 /* kick-start the NAPI softirq: */
3474 local_bh_enable();
3475 }
3476
qeth_handle_send_error(struct qeth_card * card,struct qeth_qdio_out_buffer * buffer,unsigned int qdio_err)3477 static void qeth_handle_send_error(struct qeth_card *card,
3478 struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err)
3479 {
3480 int sbalf15 = buffer->buffer->element[15].sflags;
3481
3482 QETH_CARD_TEXT(card, 6, "hdsnderr");
3483 qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr");
3484
3485 if (!qdio_err)
3486 return;
3487
3488 if ((sbalf15 >= 15) && (sbalf15 <= 31))
3489 return;
3490
3491 QETH_CARD_TEXT(card, 1, "lnkfail");
3492 QETH_CARD_TEXT_(card, 1, "%04x %02x",
3493 (u16)qdio_err, (u8)sbalf15);
3494 }
3495
3496 /**
3497 * qeth_prep_flush_pack_buffer - Prepares flushing of a packing buffer.
3498 * @queue: queue to check for packing buffer
3499 *
3500 * Returns number of buffers that were prepared for flush.
3501 */
qeth_prep_flush_pack_buffer(struct qeth_qdio_out_q * queue)3502 static int qeth_prep_flush_pack_buffer(struct qeth_qdio_out_q *queue)
3503 {
3504 struct qeth_qdio_out_buffer *buffer;
3505
3506 buffer = queue->bufs[queue->next_buf_to_fill];
3507 if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) &&
3508 (buffer->next_element_to_fill > 0)) {
3509 /* it's a packing buffer */
3510 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3511 queue->next_buf_to_fill =
3512 QDIO_BUFNR(queue->next_buf_to_fill + 1);
3513 return 1;
3514 }
3515 return 0;
3516 }
3517
3518 /*
3519 * Switched to packing state if the number of used buffers on a queue
3520 * reaches a certain limit.
3521 */
qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q * queue)3522 static void qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q *queue)
3523 {
3524 if (!queue->do_pack) {
3525 if (atomic_read(&queue->used_buffers)
3526 >= QETH_HIGH_WATERMARK_PACK){
3527 /* switch non-PACKING -> PACKING */
3528 QETH_CARD_TEXT(queue->card, 6, "np->pack");
3529 QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3530 queue->do_pack = 1;
3531 }
3532 }
3533 }
3534
3535 /*
3536 * Switches from packing to non-packing mode. If there is a packing
3537 * buffer on the queue this buffer will be prepared to be flushed.
3538 * In that case 1 is returned to inform the caller. If no buffer
3539 * has to be flushed, zero is returned.
3540 */
qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q * queue)3541 static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue)
3542 {
3543 if (queue->do_pack) {
3544 if (atomic_read(&queue->used_buffers)
3545 <= QETH_LOW_WATERMARK_PACK) {
3546 /* switch PACKING -> non-PACKING */
3547 QETH_CARD_TEXT(queue->card, 6, "pack->np");
3548 QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3549 queue->do_pack = 0;
3550 return qeth_prep_flush_pack_buffer(queue);
3551 }
3552 }
3553 return 0;
3554 }
3555
qeth_flush_buffers(struct qeth_qdio_out_q * queue,int index,int count)3556 static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
3557 int count)
3558 {
3559 struct qeth_qdio_out_buffer *buf = queue->bufs[index];
3560 struct qeth_card *card = queue->card;
3561 unsigned int frames, usecs;
3562 struct qaob *aob = NULL;
3563 int rc;
3564 int i;
3565
3566 for (i = index; i < index + count; ++i) {
3567 unsigned int bidx = QDIO_BUFNR(i);
3568 struct sk_buff *skb;
3569
3570 buf = queue->bufs[bidx];
3571 buf->buffer->element[buf->next_element_to_fill - 1].eflags |=
3572 SBAL_EFLAGS_LAST_ENTRY;
3573 queue->coalesced_frames += buf->frames;
3574
3575 if (IS_IQD(card)) {
3576 skb_queue_walk(&buf->skb_list, skb)
3577 skb_tx_timestamp(skb);
3578 }
3579 }
3580
3581 if (IS_IQD(card)) {
3582 if (card->options.cq == QETH_CQ_ENABLED &&
3583 !qeth_iqd_is_mcast_queue(card, queue) &&
3584 count == 1) {
3585 if (!buf->aob)
3586 buf->aob = kmem_cache_zalloc(qeth_qaob_cache,
3587 GFP_ATOMIC);
3588 if (buf->aob) {
3589 struct qeth_qaob_priv1 *priv;
3590
3591 aob = buf->aob;
3592 priv = (struct qeth_qaob_priv1 *)&aob->user1;
3593 priv->state = QETH_QAOB_ISSUED;
3594 priv->queue_no = queue->queue_no;
3595 }
3596 }
3597 } else {
3598 if (!queue->do_pack) {
3599 if ((atomic_read(&queue->used_buffers) >=
3600 (QETH_HIGH_WATERMARK_PACK -
3601 QETH_WATERMARK_PACK_FUZZ)) &&
3602 !atomic_read(&queue->set_pci_flags_count)) {
3603 /* it's likely that we'll go to packing
3604 * mode soon */
3605 atomic_inc(&queue->set_pci_flags_count);
3606 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3607 }
3608 } else {
3609 if (!atomic_read(&queue->set_pci_flags_count)) {
3610 /*
3611 * there's no outstanding PCI any more, so we
3612 * have to request a PCI to be sure the PCI
3613 * will wake at some time in the future then we
3614 * can flush packed buffers that might still be
3615 * hanging around, which can happen if no
3616 * further send was requested by the stack
3617 */
3618 atomic_inc(&queue->set_pci_flags_count);
3619 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3620 }
3621 }
3622 }
3623
3624 QETH_TXQ_STAT_INC(queue, doorbell);
3625 rc = qdio_add_bufs_to_output_queue(CARD_DDEV(card), queue->queue_no,
3626 index, count, aob);
3627
3628 switch (rc) {
3629 case 0:
3630 case -ENOBUFS:
3631 /* ignore temporary SIGA errors without busy condition */
3632
3633 /* Fake the TX completion interrupt: */
3634 frames = READ_ONCE(queue->max_coalesced_frames);
3635 usecs = READ_ONCE(queue->coalesce_usecs);
3636
3637 if (frames && queue->coalesced_frames >= frames) {
3638 napi_schedule(&queue->napi);
3639 queue->coalesced_frames = 0;
3640 QETH_TXQ_STAT_INC(queue, coal_frames);
3641 } else if (qeth_use_tx_irqs(card) &&
3642 atomic_read(&queue->used_buffers) >= 32) {
3643 /* Old behaviour carried over from the qdio layer: */
3644 napi_schedule(&queue->napi);
3645 QETH_TXQ_STAT_INC(queue, coal_frames);
3646 } else if (usecs) {
3647 qeth_tx_arm_timer(queue, usecs);
3648 }
3649
3650 break;
3651 default:
3652 QETH_CARD_TEXT(queue->card, 2, "flushbuf");
3653 QETH_CARD_TEXT_(queue->card, 2, " q%d", queue->queue_no);
3654 QETH_CARD_TEXT_(queue->card, 2, " idx%d", index);
3655 QETH_CARD_TEXT_(queue->card, 2, " c%d", count);
3656 QETH_CARD_TEXT_(queue->card, 2, " err%d", rc);
3657
3658 /* this must not happen under normal circumstances. if it
3659 * happens something is really wrong -> recover */
3660 qeth_schedule_recovery(queue->card);
3661 }
3662 }
3663
qeth_flush_queue(struct qeth_qdio_out_q * queue)3664 static void qeth_flush_queue(struct qeth_qdio_out_q *queue)
3665 {
3666 qeth_flush_buffers(queue, queue->bulk_start, queue->bulk_count);
3667
3668 queue->bulk_start = QDIO_BUFNR(queue->bulk_start + queue->bulk_count);
3669 queue->prev_hdr = NULL;
3670 queue->bulk_count = 0;
3671 }
3672
qeth_check_outbound_queue(struct qeth_qdio_out_q * queue)3673 static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue)
3674 {
3675 /*
3676 * check if weed have to switch to non-packing mode or if
3677 * we have to get a pci flag out on the queue
3678 */
3679 if ((atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) ||
3680 !atomic_read(&queue->set_pci_flags_count)) {
3681 unsigned int index, flush_cnt;
3682
3683 spin_lock(&queue->lock);
3684
3685 index = queue->next_buf_to_fill;
3686
3687 flush_cnt = qeth_switch_to_nonpacking_if_needed(queue);
3688 if (!flush_cnt && !atomic_read(&queue->set_pci_flags_count))
3689 flush_cnt = qeth_prep_flush_pack_buffer(queue);
3690
3691 if (flush_cnt) {
3692 qeth_flush_buffers(queue, index, flush_cnt);
3693 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_cnt);
3694 }
3695
3696 spin_unlock(&queue->lock);
3697 }
3698 }
3699
qeth_qdio_poll(struct ccw_device * cdev,unsigned long card_ptr)3700 static void qeth_qdio_poll(struct ccw_device *cdev, unsigned long card_ptr)
3701 {
3702 struct qeth_card *card = (struct qeth_card *)card_ptr;
3703
3704 napi_schedule_irqoff(&card->napi);
3705 }
3706
qeth_configure_cq(struct qeth_card * card,enum qeth_cq cq)3707 int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq)
3708 {
3709 int rc;
3710
3711 if (card->options.cq == QETH_CQ_NOTAVAILABLE) {
3712 rc = -1;
3713 goto out;
3714 } else {
3715 if (card->options.cq == cq) {
3716 rc = 0;
3717 goto out;
3718 }
3719
3720 qeth_free_qdio_queues(card);
3721 card->options.cq = cq;
3722 rc = 0;
3723 }
3724 out:
3725 return rc;
3726
3727 }
3728 EXPORT_SYMBOL_GPL(qeth_configure_cq);
3729
qeth_qdio_handle_aob(struct qeth_card * card,struct qaob * aob)3730 static void qeth_qdio_handle_aob(struct qeth_card *card, struct qaob *aob)
3731 {
3732 struct qeth_qaob_priv1 *priv = (struct qeth_qaob_priv1 *)&aob->user1;
3733 unsigned int queue_no = priv->queue_no;
3734
3735 BUILD_BUG_ON(sizeof(*priv) > ARRAY_SIZE(aob->user1));
3736
3737 if (xchg(&priv->state, QETH_QAOB_DONE) == QETH_QAOB_PENDING &&
3738 queue_no < card->qdio.no_out_queues)
3739 napi_schedule(&card->qdio.out_qs[queue_no]->napi);
3740 }
3741
qeth_qdio_cq_handler(struct qeth_card * card,unsigned int qdio_err,unsigned int queue,int first_element,int count)3742 static void qeth_qdio_cq_handler(struct qeth_card *card, unsigned int qdio_err,
3743 unsigned int queue, int first_element,
3744 int count)
3745 {
3746 struct qeth_qdio_q *cq = card->qdio.c_q;
3747 int i;
3748 int rc;
3749
3750 QETH_CARD_TEXT_(card, 5, "qcqhe%d", first_element);
3751 QETH_CARD_TEXT_(card, 5, "qcqhc%d", count);
3752 QETH_CARD_TEXT_(card, 5, "qcqherr%d", qdio_err);
3753
3754 if (qdio_err) {
3755 netif_tx_stop_all_queues(card->dev);
3756 qeth_schedule_recovery(card);
3757 return;
3758 }
3759
3760 for (i = first_element; i < first_element + count; ++i) {
3761 struct qdio_buffer *buffer = cq->qdio_bufs[QDIO_BUFNR(i)];
3762 int e = 0;
3763
3764 while ((e < QDIO_MAX_ELEMENTS_PER_BUFFER) &&
3765 buffer->element[e].addr) {
3766 unsigned long phys_aob_addr = buffer->element[e].addr;
3767
3768 qeth_qdio_handle_aob(card, phys_to_virt(phys_aob_addr));
3769 ++e;
3770 }
3771 qeth_scrub_qdio_buffer(buffer, QDIO_MAX_ELEMENTS_PER_BUFFER);
3772 }
3773 rc = qdio_add_bufs_to_input_queue(CARD_DDEV(card), queue,
3774 cq->next_buf_to_init, count);
3775 if (rc) {
3776 dev_warn(&card->gdev->dev,
3777 "QDIO reported an error, rc=%i\n", rc);
3778 QETH_CARD_TEXT(card, 2, "qcqherr");
3779 }
3780
3781 cq->next_buf_to_init = QDIO_BUFNR(cq->next_buf_to_init + count);
3782 }
3783
qeth_qdio_input_handler(struct ccw_device * ccwdev,unsigned int qdio_err,int queue,int first_elem,int count,unsigned long card_ptr)3784 static void qeth_qdio_input_handler(struct ccw_device *ccwdev,
3785 unsigned int qdio_err, int queue,
3786 int first_elem, int count,
3787 unsigned long card_ptr)
3788 {
3789 struct qeth_card *card = (struct qeth_card *)card_ptr;
3790
3791 QETH_CARD_TEXT_(card, 2, "qihq%d", queue);
3792 QETH_CARD_TEXT_(card, 2, "qiec%d", qdio_err);
3793
3794 if (qdio_err)
3795 qeth_schedule_recovery(card);
3796 }
3797
qeth_qdio_output_handler(struct ccw_device * ccwdev,unsigned int qdio_error,int __queue,int first_element,int count,unsigned long card_ptr)3798 static void qeth_qdio_output_handler(struct ccw_device *ccwdev,
3799 unsigned int qdio_error, int __queue,
3800 int first_element, int count,
3801 unsigned long card_ptr)
3802 {
3803 struct qeth_card *card = (struct qeth_card *) card_ptr;
3804
3805 QETH_CARD_TEXT(card, 2, "achkcond");
3806 netif_tx_stop_all_queues(card->dev);
3807 qeth_schedule_recovery(card);
3808 }
3809
3810 /*
3811 * Note: Function assumes that we have 4 outbound queues.
3812 */
qeth_get_priority_queue(struct qeth_card * card,struct sk_buff * skb)3813 static int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb)
3814 {
3815 struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
3816 u8 tos;
3817
3818 switch (card->qdio.do_prio_queueing) {
3819 case QETH_PRIO_Q_ING_TOS:
3820 case QETH_PRIO_Q_ING_PREC:
3821 switch (vlan_get_protocol(skb)) {
3822 case htons(ETH_P_IP):
3823 tos = ipv4_get_dsfield(ip_hdr(skb));
3824 break;
3825 case htons(ETH_P_IPV6):
3826 tos = ipv6_get_dsfield(ipv6_hdr(skb));
3827 break;
3828 default:
3829 return card->qdio.default_out_queue;
3830 }
3831 if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC)
3832 return ~tos >> 6 & 3;
3833 if (tos & IPTOS_MINCOST)
3834 return 3;
3835 if (tos & IPTOS_RELIABILITY)
3836 return 2;
3837 if (tos & IPTOS_THROUGHPUT)
3838 return 1;
3839 if (tos & IPTOS_LOWDELAY)
3840 return 0;
3841 break;
3842 case QETH_PRIO_Q_ING_SKB:
3843 if (skb->priority > 5)
3844 return 0;
3845 return ~skb->priority >> 1 & 3;
3846 case QETH_PRIO_Q_ING_VLAN:
3847 if (veth->h_vlan_proto == htons(ETH_P_8021Q))
3848 return ~ntohs(veth->h_vlan_TCI) >>
3849 (VLAN_PRIO_SHIFT + 1) & 3;
3850 break;
3851 case QETH_PRIO_Q_ING_FIXED:
3852 return card->qdio.default_out_queue;
3853 default:
3854 break;
3855 }
3856 return card->qdio.default_out_queue;
3857 }
3858
3859 /**
3860 * qeth_get_elements_for_frags() - find number of SBALEs for skb frags.
3861 * @skb: SKB address
3862 *
3863 * Returns the number of pages, and thus QDIO buffer elements, needed to cover
3864 * fragmented part of the SKB. Returns zero for linear SKB.
3865 */
qeth_get_elements_for_frags(struct sk_buff * skb)3866 static int qeth_get_elements_for_frags(struct sk_buff *skb)
3867 {
3868 int cnt, elements = 0;
3869
3870 for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3871 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
3872
3873 elements += qeth_get_elements_for_range(
3874 (addr_t)skb_frag_address(frag),
3875 (addr_t)skb_frag_address(frag) + skb_frag_size(frag));
3876 }
3877 return elements;
3878 }
3879
3880 /**
3881 * qeth_count_elements() - Counts the number of QDIO buffer elements needed
3882 * to transmit an skb.
3883 * @skb: the skb to operate on.
3884 * @data_offset: skip this part of the skb's linear data
3885 *
3886 * Returns the number of pages, and thus QDIO buffer elements, needed to map the
3887 * skb's data (both its linear part and paged fragments).
3888 */
qeth_count_elements(struct sk_buff * skb,unsigned int data_offset)3889 static unsigned int qeth_count_elements(struct sk_buff *skb,
3890 unsigned int data_offset)
3891 {
3892 unsigned int elements = qeth_get_elements_for_frags(skb);
3893 addr_t end = (addr_t)skb->data + skb_headlen(skb);
3894 addr_t start = (addr_t)skb->data + data_offset;
3895
3896 if (start != end)
3897 elements += qeth_get_elements_for_range(start, end);
3898 return elements;
3899 }
3900
3901 #define QETH_HDR_CACHE_OBJ_SIZE (sizeof(struct qeth_hdr_tso) + \
3902 MAX_TCP_HEADER)
3903
3904 /**
3905 * qeth_add_hw_header() - add a HW header to an skb.
3906 * @queue: TX queue that the skb will be placed on.
3907 * @skb: skb that the HW header should be added to.
3908 * @hdr: double pointer to a qeth_hdr. When returning with >= 0,
3909 * it contains a valid pointer to a qeth_hdr.
3910 * @hdr_len: length of the HW header.
3911 * @proto_len: length of protocol headers that need to be in same page as the
3912 * HW header.
3913 * @elements: returns the required number of buffer elements for this skb.
3914 *
3915 * Returns the pushed length. If the header can't be pushed on
3916 * (eg. because it would cross a page boundary), it is allocated from
3917 * the cache instead and 0 is returned.
3918 * The number of needed buffer elements is returned in @elements.
3919 * Error to create the hdr is indicated by returning with < 0.
3920 */
qeth_add_hw_header(struct qeth_qdio_out_q * queue,struct sk_buff * skb,struct qeth_hdr ** hdr,unsigned int hdr_len,unsigned int proto_len,unsigned int * elements)3921 static int qeth_add_hw_header(struct qeth_qdio_out_q *queue,
3922 struct sk_buff *skb, struct qeth_hdr **hdr,
3923 unsigned int hdr_len, unsigned int proto_len,
3924 unsigned int *elements)
3925 {
3926 gfp_t gfp = GFP_ATOMIC | (skb_pfmemalloc(skb) ? __GFP_MEMALLOC : 0);
3927 const unsigned int contiguous = proto_len ? proto_len : 1;
3928 const unsigned int max_elements = queue->max_elements;
3929 unsigned int __elements;
3930 addr_t start, end;
3931 bool push_ok;
3932 int rc;
3933
3934 check_layout:
3935 start = (addr_t)skb->data - hdr_len;
3936 end = (addr_t)skb->data;
3937
3938 if (qeth_get_elements_for_range(start, end + contiguous) == 1) {
3939 /* Push HW header into same page as first protocol header. */
3940 push_ok = true;
3941 /* ... but TSO always needs a separate element for headers: */
3942 if (skb_is_gso(skb))
3943 __elements = 1 + qeth_count_elements(skb, proto_len);
3944 else
3945 __elements = qeth_count_elements(skb, 0);
3946 } else if (!proto_len && PAGE_ALIGNED(skb->data)) {
3947 /* Push HW header into preceding page, flush with skb->data. */
3948 push_ok = true;
3949 __elements = 1 + qeth_count_elements(skb, 0);
3950 } else {
3951 /* Use header cache, copy protocol headers up. */
3952 push_ok = false;
3953 __elements = 1 + qeth_count_elements(skb, proto_len);
3954 }
3955
3956 /* Compress skb to fit into one IO buffer: */
3957 if (__elements > max_elements) {
3958 if (!skb_is_nonlinear(skb)) {
3959 /* Drop it, no easy way of shrinking it further. */
3960 QETH_DBF_MESSAGE(2, "Dropped an oversized skb (Max Elements=%u / Actual=%u / Length=%u).\n",
3961 max_elements, __elements, skb->len);
3962 return -E2BIG;
3963 }
3964
3965 rc = skb_linearize(skb);
3966 if (rc) {
3967 QETH_TXQ_STAT_INC(queue, skbs_linearized_fail);
3968 return rc;
3969 }
3970
3971 QETH_TXQ_STAT_INC(queue, skbs_linearized);
3972 /* Linearization changed the layout, re-evaluate: */
3973 goto check_layout;
3974 }
3975
3976 *elements = __elements;
3977 /* Add the header: */
3978 if (push_ok) {
3979 *hdr = skb_push(skb, hdr_len);
3980 return hdr_len;
3981 }
3982
3983 /* Fall back to cache element with known-good alignment: */
3984 if (hdr_len + proto_len > QETH_HDR_CACHE_OBJ_SIZE)
3985 return -E2BIG;
3986 *hdr = kmem_cache_alloc(qeth_core_header_cache, gfp);
3987 if (!*hdr)
3988 return -ENOMEM;
3989 /* Copy protocol headers behind HW header: */
3990 skb_copy_from_linear_data(skb, ((char *)*hdr) + hdr_len, proto_len);
3991 return 0;
3992 }
3993
qeth_iqd_may_bulk(struct qeth_qdio_out_q * queue,struct sk_buff * curr_skb,struct qeth_hdr * curr_hdr)3994 static bool qeth_iqd_may_bulk(struct qeth_qdio_out_q *queue,
3995 struct sk_buff *curr_skb,
3996 struct qeth_hdr *curr_hdr)
3997 {
3998 struct qeth_qdio_out_buffer *buffer = queue->bufs[queue->bulk_start];
3999 struct qeth_hdr *prev_hdr = queue->prev_hdr;
4000
4001 if (!prev_hdr)
4002 return true;
4003
4004 /* All packets must have the same target: */
4005 if (curr_hdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER2) {
4006 struct sk_buff *prev_skb = skb_peek(&buffer->skb_list);
4007
4008 return ether_addr_equal(eth_hdr(prev_skb)->h_dest,
4009 eth_hdr(curr_skb)->h_dest) &&
4010 qeth_l2_same_vlan(&prev_hdr->hdr.l2, &curr_hdr->hdr.l2);
4011 }
4012
4013 return qeth_l3_same_next_hop(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3) &&
4014 qeth_l3_iqd_same_vlan(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3);
4015 }
4016
4017 /**
4018 * qeth_fill_buffer() - map skb into an output buffer
4019 * @buf: buffer to transport the skb
4020 * @skb: skb to map into the buffer
4021 * @hdr: qeth_hdr for this skb. Either at skb->data, or allocated
4022 * from qeth_core_header_cache.
4023 * @offset: when mapping the skb, start at skb->data + offset
4024 * @hd_len: if > 0, build a dedicated header element of this size
4025 */
qeth_fill_buffer(struct qeth_qdio_out_buffer * buf,struct sk_buff * skb,struct qeth_hdr * hdr,unsigned int offset,unsigned int hd_len)4026 static unsigned int qeth_fill_buffer(struct qeth_qdio_out_buffer *buf,
4027 struct sk_buff *skb, struct qeth_hdr *hdr,
4028 unsigned int offset, unsigned int hd_len)
4029 {
4030 struct qdio_buffer *buffer = buf->buffer;
4031 int element = buf->next_element_to_fill;
4032 int length = skb_headlen(skb) - offset;
4033 char *data = skb->data + offset;
4034 unsigned int elem_length, cnt;
4035 bool is_first_elem = true;
4036
4037 __skb_queue_tail(&buf->skb_list, skb);
4038
4039 /* build dedicated element for HW Header */
4040 if (hd_len) {
4041 is_first_elem = false;
4042
4043 buffer->element[element].addr = virt_to_phys(hdr);
4044 buffer->element[element].length = hd_len;
4045 buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
4046
4047 /* HW header is allocated from cache: */
4048 if ((void *)hdr != skb->data)
4049 __set_bit(element, buf->from_kmem_cache);
4050 /* HW header was pushed and is contiguous with linear part: */
4051 else if (length > 0 && !PAGE_ALIGNED(data) &&
4052 (data == (char *)hdr + hd_len))
4053 buffer->element[element].eflags |=
4054 SBAL_EFLAGS_CONTIGUOUS;
4055
4056 element++;
4057 }
4058
4059 /* map linear part into buffer element(s) */
4060 while (length > 0) {
4061 elem_length = min_t(unsigned int, length,
4062 PAGE_SIZE - offset_in_page(data));
4063
4064 buffer->element[element].addr = virt_to_phys(data);
4065 buffer->element[element].length = elem_length;
4066 length -= elem_length;
4067 if (is_first_elem) {
4068 is_first_elem = false;
4069 if (length || skb_is_nonlinear(skb))
4070 /* skb needs additional elements */
4071 buffer->element[element].eflags =
4072 SBAL_EFLAGS_FIRST_FRAG;
4073 else
4074 buffer->element[element].eflags = 0;
4075 } else {
4076 buffer->element[element].eflags =
4077 SBAL_EFLAGS_MIDDLE_FRAG;
4078 }
4079
4080 data += elem_length;
4081 element++;
4082 }
4083
4084 /* map page frags into buffer element(s) */
4085 for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
4086 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
4087
4088 data = skb_frag_address(frag);
4089 length = skb_frag_size(frag);
4090 while (length > 0) {
4091 elem_length = min_t(unsigned int, length,
4092 PAGE_SIZE - offset_in_page(data));
4093
4094 buffer->element[element].addr = virt_to_phys(data);
4095 buffer->element[element].length = elem_length;
4096 buffer->element[element].eflags =
4097 SBAL_EFLAGS_MIDDLE_FRAG;
4098
4099 length -= elem_length;
4100 data += elem_length;
4101 element++;
4102 }
4103 }
4104
4105 if (buffer->element[element - 1].eflags)
4106 buffer->element[element - 1].eflags = SBAL_EFLAGS_LAST_FRAG;
4107 buf->next_element_to_fill = element;
4108 return element;
4109 }
4110
__qeth_xmit(struct qeth_card * card,struct qeth_qdio_out_q * queue,struct sk_buff * skb,unsigned int elements,struct qeth_hdr * hdr,unsigned int offset,unsigned int hd_len)4111 static int __qeth_xmit(struct qeth_card *card, struct qeth_qdio_out_q *queue,
4112 struct sk_buff *skb, unsigned int elements,
4113 struct qeth_hdr *hdr, unsigned int offset,
4114 unsigned int hd_len)
4115 {
4116 unsigned int bytes = qdisc_pkt_len(skb);
4117 struct qeth_qdio_out_buffer *buffer;
4118 unsigned int next_element;
4119 struct netdev_queue *txq;
4120 bool stopped = false;
4121 bool flush;
4122
4123 buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start + queue->bulk_count)];
4124 txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
4125
4126 /* Just a sanity check, the wake/stop logic should ensure that we always
4127 * get a free buffer.
4128 */
4129 if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4130 return -EBUSY;
4131
4132 flush = !qeth_iqd_may_bulk(queue, skb, hdr);
4133
4134 if (flush ||
4135 (buffer->next_element_to_fill + elements > queue->max_elements)) {
4136 if (buffer->next_element_to_fill > 0) {
4137 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4138 queue->bulk_count++;
4139 }
4140
4141 if (queue->bulk_count >= queue->bulk_max)
4142 flush = true;
4143
4144 if (flush)
4145 qeth_flush_queue(queue);
4146
4147 buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start +
4148 queue->bulk_count)];
4149
4150 /* Sanity-check again: */
4151 if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4152 return -EBUSY;
4153 }
4154
4155 if (buffer->next_element_to_fill == 0 &&
4156 atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
4157 /* If a TX completion happens right _here_ and misses to wake
4158 * the txq, then our re-check below will catch the race.
4159 */
4160 QETH_TXQ_STAT_INC(queue, stopped);
4161 netif_tx_stop_queue(txq);
4162 stopped = true;
4163 }
4164
4165 next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
4166 buffer->bytes += bytes;
4167 buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
4168 queue->prev_hdr = hdr;
4169
4170 flush = __netdev_tx_sent_queue(txq, bytes,
4171 !stopped && netdev_xmit_more());
4172
4173 if (flush || next_element >= queue->max_elements) {
4174 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4175 queue->bulk_count++;
4176
4177 if (queue->bulk_count >= queue->bulk_max)
4178 flush = true;
4179
4180 if (flush)
4181 qeth_flush_queue(queue);
4182 }
4183
4184 if (stopped && !qeth_out_queue_is_full(queue))
4185 netif_tx_start_queue(txq);
4186 return 0;
4187 }
4188
qeth_do_send_packet(struct qeth_card * card,struct qeth_qdio_out_q * queue,struct sk_buff * skb,struct qeth_hdr * hdr,unsigned int offset,unsigned int hd_len,unsigned int elements_needed)4189 static int qeth_do_send_packet(struct qeth_card *card,
4190 struct qeth_qdio_out_q *queue,
4191 struct sk_buff *skb, struct qeth_hdr *hdr,
4192 unsigned int offset, unsigned int hd_len,
4193 unsigned int elements_needed)
4194 {
4195 unsigned int start_index = queue->next_buf_to_fill;
4196 struct qeth_qdio_out_buffer *buffer;
4197 unsigned int next_element;
4198 struct netdev_queue *txq;
4199 bool stopped = false;
4200 int flush_count = 0;
4201 int do_pack = 0;
4202 int rc = 0;
4203
4204 buffer = queue->bufs[queue->next_buf_to_fill];
4205
4206 /* Just a sanity check, the wake/stop logic should ensure that we always
4207 * get a free buffer.
4208 */
4209 if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4210 return -EBUSY;
4211
4212 txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
4213
4214 /* check if we need to switch packing state of this queue */
4215 qeth_switch_to_packing_if_needed(queue);
4216 if (queue->do_pack) {
4217 do_pack = 1;
4218 /* does packet fit in current buffer? */
4219 if (buffer->next_element_to_fill + elements_needed >
4220 queue->max_elements) {
4221 /* ... no -> set state PRIMED */
4222 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4223 flush_count++;
4224 queue->next_buf_to_fill =
4225 QDIO_BUFNR(queue->next_buf_to_fill + 1);
4226 buffer = queue->bufs[queue->next_buf_to_fill];
4227
4228 /* We stepped forward, so sanity-check again: */
4229 if (atomic_read(&buffer->state) !=
4230 QETH_QDIO_BUF_EMPTY) {
4231 qeth_flush_buffers(queue, start_index,
4232 flush_count);
4233 rc = -EBUSY;
4234 goto out;
4235 }
4236 }
4237 }
4238
4239 if (buffer->next_element_to_fill == 0 &&
4240 atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
4241 /* If a TX completion happens right _here_ and misses to wake
4242 * the txq, then our re-check below will catch the race.
4243 */
4244 QETH_TXQ_STAT_INC(queue, stopped);
4245 netif_tx_stop_queue(txq);
4246 stopped = true;
4247 }
4248
4249 next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
4250 buffer->bytes += qdisc_pkt_len(skb);
4251 buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
4252
4253 if (queue->do_pack)
4254 QETH_TXQ_STAT_INC(queue, skbs_pack);
4255 if (!queue->do_pack || stopped || next_element >= queue->max_elements) {
4256 flush_count++;
4257 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4258 queue->next_buf_to_fill =
4259 QDIO_BUFNR(queue->next_buf_to_fill + 1);
4260 }
4261
4262 if (flush_count)
4263 qeth_flush_buffers(queue, start_index, flush_count);
4264
4265 out:
4266 if (do_pack)
4267 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_count);
4268
4269 if (stopped && !qeth_out_queue_is_full(queue))
4270 netif_tx_start_queue(txq);
4271 return rc;
4272 }
4273
qeth_fill_tso_ext(struct qeth_hdr_tso * hdr,unsigned int payload_len,struct sk_buff * skb,unsigned int proto_len)4274 static void qeth_fill_tso_ext(struct qeth_hdr_tso *hdr,
4275 unsigned int payload_len, struct sk_buff *skb,
4276 unsigned int proto_len)
4277 {
4278 struct qeth_hdr_ext_tso *ext = &hdr->ext;
4279
4280 ext->hdr_tot_len = sizeof(*ext);
4281 ext->imb_hdr_no = 1;
4282 ext->hdr_type = 1;
4283 ext->hdr_version = 1;
4284 ext->hdr_len = 28;
4285 ext->payload_len = payload_len;
4286 ext->mss = skb_shinfo(skb)->gso_size;
4287 ext->dg_hdr_len = proto_len;
4288 }
4289
qeth_xmit(struct qeth_card * card,struct sk_buff * skb,struct qeth_qdio_out_q * queue,__be16 proto,void (* fill_header)(struct qeth_qdio_out_q * queue,struct qeth_hdr * hdr,struct sk_buff * skb,__be16 proto,unsigned int data_len))4290 int qeth_xmit(struct qeth_card *card, struct sk_buff *skb,
4291 struct qeth_qdio_out_q *queue, __be16 proto,
4292 void (*fill_header)(struct qeth_qdio_out_q *queue,
4293 struct qeth_hdr *hdr, struct sk_buff *skb,
4294 __be16 proto, unsigned int data_len))
4295 {
4296 unsigned int proto_len, hw_hdr_len;
4297 unsigned int frame_len = skb->len;
4298 bool is_tso = skb_is_gso(skb);
4299 unsigned int data_offset = 0;
4300 struct qeth_hdr *hdr = NULL;
4301 unsigned int hd_len = 0;
4302 unsigned int elements;
4303 int push_len, rc;
4304
4305 if (is_tso) {
4306 hw_hdr_len = sizeof(struct qeth_hdr_tso);
4307 proto_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
4308 } else {
4309 hw_hdr_len = sizeof(struct qeth_hdr);
4310 proto_len = (IS_IQD(card) && IS_LAYER2(card)) ? ETH_HLEN : 0;
4311 }
4312
4313 rc = skb_cow_head(skb, hw_hdr_len);
4314 if (rc)
4315 return rc;
4316
4317 push_len = qeth_add_hw_header(queue, skb, &hdr, hw_hdr_len, proto_len,
4318 &elements);
4319 if (push_len < 0)
4320 return push_len;
4321 if (is_tso || !push_len) {
4322 /* HW header needs its own buffer element. */
4323 hd_len = hw_hdr_len + proto_len;
4324 data_offset = push_len + proto_len;
4325 }
4326 memset(hdr, 0, hw_hdr_len);
4327 fill_header(queue, hdr, skb, proto, frame_len);
4328 if (is_tso)
4329 qeth_fill_tso_ext((struct qeth_hdr_tso *) hdr,
4330 frame_len - proto_len, skb, proto_len);
4331
4332 if (IS_IQD(card)) {
4333 rc = __qeth_xmit(card, queue, skb, elements, hdr, data_offset,
4334 hd_len);
4335 } else {
4336 /* TODO: drop skb_orphan() once TX completion is fast enough */
4337 skb_orphan(skb);
4338 spin_lock(&queue->lock);
4339 rc = qeth_do_send_packet(card, queue, skb, hdr, data_offset,
4340 hd_len, elements);
4341 spin_unlock(&queue->lock);
4342 }
4343
4344 if (rc && !push_len)
4345 kmem_cache_free(qeth_core_header_cache, hdr);
4346
4347 return rc;
4348 }
4349 EXPORT_SYMBOL_GPL(qeth_xmit);
4350
qeth_setadp_promisc_mode_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)4351 static int qeth_setadp_promisc_mode_cb(struct qeth_card *card,
4352 struct qeth_reply *reply, unsigned long data)
4353 {
4354 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4355 struct qeth_ipacmd_setadpparms *setparms;
4356
4357 QETH_CARD_TEXT(card, 4, "prmadpcb");
4358
4359 setparms = &(cmd->data.setadapterparms);
4360 if (qeth_setadpparms_inspect_rc(cmd)) {
4361 QETH_CARD_TEXT_(card, 4, "prmrc%x", cmd->hdr.return_code);
4362 setparms->data.mode = SET_PROMISC_MODE_OFF;
4363 }
4364 card->info.promisc_mode = setparms->data.mode;
4365 return (cmd->hdr.return_code) ? -EIO : 0;
4366 }
4367
qeth_setadp_promisc_mode(struct qeth_card * card,bool enable)4368 void qeth_setadp_promisc_mode(struct qeth_card *card, bool enable)
4369 {
4370 enum qeth_ipa_promisc_modes mode = enable ? SET_PROMISC_MODE_ON :
4371 SET_PROMISC_MODE_OFF;
4372 struct qeth_cmd_buffer *iob;
4373 struct qeth_ipa_cmd *cmd;
4374
4375 QETH_CARD_TEXT(card, 4, "setprom");
4376 QETH_CARD_TEXT_(card, 4, "mode:%x", mode);
4377
4378 iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE,
4379 SETADP_DATA_SIZEOF(mode));
4380 if (!iob)
4381 return;
4382 cmd = __ipa_cmd(iob);
4383 cmd->data.setadapterparms.data.mode = mode;
4384 qeth_send_ipa_cmd(card, iob, qeth_setadp_promisc_mode_cb, NULL);
4385 }
4386 EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode);
4387
qeth_setadpparms_change_macaddr_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)4388 static int qeth_setadpparms_change_macaddr_cb(struct qeth_card *card,
4389 struct qeth_reply *reply, unsigned long data)
4390 {
4391 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4392 struct qeth_ipacmd_setadpparms *adp_cmd;
4393
4394 QETH_CARD_TEXT(card, 4, "chgmaccb");
4395 if (qeth_setadpparms_inspect_rc(cmd))
4396 return -EIO;
4397
4398 adp_cmd = &cmd->data.setadapterparms;
4399 if (!is_valid_ether_addr(adp_cmd->data.change_addr.addr))
4400 return -EADDRNOTAVAIL;
4401
4402 if (IS_LAYER2(card) && IS_OSD(card) && !IS_VM_NIC(card) &&
4403 !(adp_cmd->hdr.flags & QETH_SETADP_FLAGS_VIRTUAL_MAC))
4404 return -EADDRNOTAVAIL;
4405
4406 eth_hw_addr_set(card->dev, adp_cmd->data.change_addr.addr);
4407 return 0;
4408 }
4409
qeth_setadpparms_change_macaddr(struct qeth_card * card)4410 int qeth_setadpparms_change_macaddr(struct qeth_card *card)
4411 {
4412 int rc;
4413 struct qeth_cmd_buffer *iob;
4414 struct qeth_ipa_cmd *cmd;
4415
4416 QETH_CARD_TEXT(card, 4, "chgmac");
4417
4418 iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS,
4419 SETADP_DATA_SIZEOF(change_addr));
4420 if (!iob)
4421 return -ENOMEM;
4422 cmd = __ipa_cmd(iob);
4423 cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC;
4424 cmd->data.setadapterparms.data.change_addr.addr_size = ETH_ALEN;
4425 ether_addr_copy(cmd->data.setadapterparms.data.change_addr.addr,
4426 card->dev->dev_addr);
4427 rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_change_macaddr_cb,
4428 NULL);
4429 return rc;
4430 }
4431 EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr);
4432
qeth_setadpparms_set_access_ctrl_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)4433 static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card,
4434 struct qeth_reply *reply, unsigned long data)
4435 {
4436 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4437 struct qeth_set_access_ctrl *access_ctrl_req;
4438
4439 QETH_CARD_TEXT(card, 4, "setaccb");
4440
4441 access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4442 QETH_CARD_TEXT_(card, 2, "rc=%d",
4443 cmd->data.setadapterparms.hdr.return_code);
4444 if (cmd->data.setadapterparms.hdr.return_code !=
4445 SET_ACCESS_CTRL_RC_SUCCESS)
4446 QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%#x) on device %x: %#x\n",
4447 access_ctrl_req->subcmd_code, CARD_DEVID(card),
4448 cmd->data.setadapterparms.hdr.return_code);
4449 switch (qeth_setadpparms_inspect_rc(cmd)) {
4450 case SET_ACCESS_CTRL_RC_SUCCESS:
4451 if (access_ctrl_req->subcmd_code == ISOLATION_MODE_NONE)
4452 dev_info(&card->gdev->dev,
4453 "QDIO data connection isolation is deactivated\n");
4454 else
4455 dev_info(&card->gdev->dev,
4456 "QDIO data connection isolation is activated\n");
4457 return 0;
4458 case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
4459 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already deactivated\n",
4460 CARD_DEVID(card));
4461 return 0;
4462 case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
4463 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already activated\n",
4464 CARD_DEVID(card));
4465 return 0;
4466 case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
4467 dev_err(&card->gdev->dev, "Adapter does not "
4468 "support QDIO data connection isolation\n");
4469 return -EOPNOTSUPP;
4470 case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
4471 dev_err(&card->gdev->dev,
4472 "Adapter is dedicated. "
4473 "QDIO data connection isolation not supported\n");
4474 return -EOPNOTSUPP;
4475 case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
4476 dev_err(&card->gdev->dev,
4477 "TSO does not permit QDIO data connection isolation\n");
4478 return -EPERM;
4479 case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED:
4480 dev_err(&card->gdev->dev, "The adjacent switch port does not "
4481 "support reflective relay mode\n");
4482 return -EOPNOTSUPP;
4483 case SET_ACCESS_CTRL_RC_REFLREL_FAILED:
4484 dev_err(&card->gdev->dev, "The reflective relay mode cannot be "
4485 "enabled at the adjacent switch port");
4486 return -EREMOTEIO;
4487 case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED:
4488 dev_warn(&card->gdev->dev, "Turning off reflective relay mode "
4489 "at the adjacent switch failed\n");
4490 /* benign error while disabling ISOLATION_MODE_FWD */
4491 return 0;
4492 default:
4493 return -EIO;
4494 }
4495 }
4496
qeth_setadpparms_set_access_ctrl(struct qeth_card * card,enum qeth_ipa_isolation_modes mode)4497 int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
4498 enum qeth_ipa_isolation_modes mode)
4499 {
4500 int rc;
4501 struct qeth_cmd_buffer *iob;
4502 struct qeth_ipa_cmd *cmd;
4503 struct qeth_set_access_ctrl *access_ctrl_req;
4504
4505 QETH_CARD_TEXT(card, 4, "setacctl");
4506
4507 if (!qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
4508 dev_err(&card->gdev->dev,
4509 "Adapter does not support QDIO data connection isolation\n");
4510 return -EOPNOTSUPP;
4511 }
4512
4513 iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
4514 SETADP_DATA_SIZEOF(set_access_ctrl));
4515 if (!iob)
4516 return -ENOMEM;
4517 cmd = __ipa_cmd(iob);
4518 access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4519 access_ctrl_req->subcmd_code = mode;
4520
4521 rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb,
4522 NULL);
4523 if (rc) {
4524 QETH_CARD_TEXT_(card, 2, "rc=%d", rc);
4525 QETH_DBF_MESSAGE(3, "IPA(SET_ACCESS_CTRL(%d) on device %x: sent failed\n",
4526 rc, CARD_DEVID(card));
4527 }
4528
4529 return rc;
4530 }
4531
qeth_tx_timeout(struct net_device * dev,unsigned int txqueue)4532 void qeth_tx_timeout(struct net_device *dev, unsigned int txqueue)
4533 {
4534 struct qeth_card *card;
4535
4536 card = dev->ml_priv;
4537 QETH_CARD_TEXT(card, 4, "txtimeo");
4538 qeth_schedule_recovery(card);
4539 }
4540 EXPORT_SYMBOL_GPL(qeth_tx_timeout);
4541
qeth_mdio_read(struct net_device * dev,int phy_id,int regnum)4542 static int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum)
4543 {
4544 struct qeth_card *card = dev->ml_priv;
4545 int rc = 0;
4546
4547 switch (regnum) {
4548 case MII_BMCR: /* Basic mode control register */
4549 rc = BMCR_FULLDPLX;
4550 if ((card->info.link_type != QETH_LINK_TYPE_GBIT_ETH) &&
4551 (card->info.link_type != QETH_LINK_TYPE_10GBIT_ETH) &&
4552 (card->info.link_type != QETH_LINK_TYPE_25GBIT_ETH))
4553 rc |= BMCR_SPEED100;
4554 break;
4555 case MII_BMSR: /* Basic mode status register */
4556 rc = BMSR_ERCAP | BMSR_ANEGCOMPLETE | BMSR_LSTATUS |
4557 BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL |
4558 BMSR_100BASE4;
4559 break;
4560 case MII_PHYSID1: /* PHYS ID 1 */
4561 rc = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 8) |
4562 dev->dev_addr[2];
4563 rc = (rc >> 5) & 0xFFFF;
4564 break;
4565 case MII_PHYSID2: /* PHYS ID 2 */
4566 rc = (dev->dev_addr[2] << 10) & 0xFFFF;
4567 break;
4568 case MII_ADVERTISE: /* Advertisement control reg */
4569 rc = ADVERTISE_ALL;
4570 break;
4571 case MII_LPA: /* Link partner ability reg */
4572 rc = LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL |
4573 LPA_100BASE4 | LPA_LPACK;
4574 break;
4575 case MII_EXPANSION: /* Expansion register */
4576 break;
4577 case MII_DCOUNTER: /* disconnect counter */
4578 break;
4579 case MII_FCSCOUNTER: /* false carrier counter */
4580 break;
4581 case MII_NWAYTEST: /* N-way auto-neg test register */
4582 break;
4583 case MII_RERRCOUNTER: /* rx error counter */
4584 rc = card->stats.rx_length_errors +
4585 card->stats.rx_frame_errors +
4586 card->stats.rx_fifo_errors;
4587 break;
4588 case MII_SREVISION: /* silicon revision */
4589 break;
4590 case MII_RESV1: /* reserved 1 */
4591 break;
4592 case MII_LBRERROR: /* loopback, rx, bypass error */
4593 break;
4594 case MII_PHYADDR: /* physical address */
4595 break;
4596 case MII_RESV2: /* reserved 2 */
4597 break;
4598 case MII_TPISTATUS: /* TPI status for 10mbps */
4599 break;
4600 case MII_NCONFIG: /* network interface config */
4601 break;
4602 default:
4603 break;
4604 }
4605 return rc;
4606 }
4607
qeth_snmp_command_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)4608 static int qeth_snmp_command_cb(struct qeth_card *card,
4609 struct qeth_reply *reply, unsigned long data)
4610 {
4611 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4612 struct qeth_arp_query_info *qinfo = reply->param;
4613 struct qeth_ipacmd_setadpparms *adp_cmd;
4614 unsigned int data_len;
4615 void *snmp_data;
4616
4617 QETH_CARD_TEXT(card, 3, "snpcmdcb");
4618
4619 if (cmd->hdr.return_code) {
4620 QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code);
4621 return -EIO;
4622 }
4623 if (cmd->data.setadapterparms.hdr.return_code) {
4624 cmd->hdr.return_code =
4625 cmd->data.setadapterparms.hdr.return_code;
4626 QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code);
4627 return -EIO;
4628 }
4629
4630 adp_cmd = &cmd->data.setadapterparms;
4631 data_len = adp_cmd->hdr.cmdlength - sizeof(adp_cmd->hdr);
4632 if (adp_cmd->hdr.seq_no == 1) {
4633 snmp_data = &adp_cmd->data.snmp;
4634 } else {
4635 snmp_data = &adp_cmd->data.snmp.request;
4636 data_len -= offsetof(struct qeth_snmp_cmd, request);
4637 }
4638
4639 /* check if there is enough room in userspace */
4640 if ((qinfo->udata_len - qinfo->udata_offset) < data_len) {
4641 QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOSPC);
4642 return -ENOSPC;
4643 }
4644 QETH_CARD_TEXT_(card, 4, "snore%i",
4645 cmd->data.setadapterparms.hdr.used_total);
4646 QETH_CARD_TEXT_(card, 4, "sseqn%i",
4647 cmd->data.setadapterparms.hdr.seq_no);
4648 /*copy entries to user buffer*/
4649 memcpy(qinfo->udata + qinfo->udata_offset, snmp_data, data_len);
4650 qinfo->udata_offset += data_len;
4651
4652 if (cmd->data.setadapterparms.hdr.seq_no <
4653 cmd->data.setadapterparms.hdr.used_total)
4654 return 1;
4655 return 0;
4656 }
4657
qeth_snmp_command(struct qeth_card * card,char __user * udata)4658 static int qeth_snmp_command(struct qeth_card *card, char __user *udata)
4659 {
4660 struct qeth_snmp_ureq __user *ureq;
4661 struct qeth_cmd_buffer *iob;
4662 unsigned int req_len;
4663 struct qeth_arp_query_info qinfo = {0, };
4664 int rc = 0;
4665
4666 QETH_CARD_TEXT(card, 3, "snmpcmd");
4667
4668 if (IS_VM_NIC(card))
4669 return -EOPNOTSUPP;
4670
4671 if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) &&
4672 IS_LAYER3(card))
4673 return -EOPNOTSUPP;
4674
4675 ureq = (struct qeth_snmp_ureq __user *) udata;
4676 if (get_user(qinfo.udata_len, &ureq->hdr.data_len) ||
4677 get_user(req_len, &ureq->hdr.req_len))
4678 return -EFAULT;
4679
4680 /* Sanitize user input, to avoid overflows in iob size calculation: */
4681 if (req_len > QETH_BUFSIZE)
4682 return -EINVAL;
4683
4684 iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL, req_len);
4685 if (!iob)
4686 return -ENOMEM;
4687
4688 if (copy_from_user(&__ipa_cmd(iob)->data.setadapterparms.data.snmp,
4689 &ureq->cmd, req_len)) {
4690 qeth_put_cmd(iob);
4691 return -EFAULT;
4692 }
4693
4694 qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
4695 if (!qinfo.udata) {
4696 qeth_put_cmd(iob);
4697 return -ENOMEM;
4698 }
4699 qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr);
4700
4701 rc = qeth_send_ipa_cmd(card, iob, qeth_snmp_command_cb, &qinfo);
4702 if (rc)
4703 QETH_DBF_MESSAGE(2, "SNMP command failed on device %x: (%#x)\n",
4704 CARD_DEVID(card), rc);
4705 else {
4706 if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
4707 rc = -EFAULT;
4708 }
4709
4710 kfree(qinfo.udata);
4711 return rc;
4712 }
4713
qeth_setadpparms_query_oat_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)4714 static int qeth_setadpparms_query_oat_cb(struct qeth_card *card,
4715 struct qeth_reply *reply,
4716 unsigned long data)
4717 {
4718 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4719 struct qeth_qoat_priv *priv = reply->param;
4720 int resdatalen;
4721
4722 QETH_CARD_TEXT(card, 3, "qoatcb");
4723 if (qeth_setadpparms_inspect_rc(cmd))
4724 return -EIO;
4725
4726 resdatalen = cmd->data.setadapterparms.hdr.cmdlength;
4727
4728 if (resdatalen > (priv->buffer_len - priv->response_len))
4729 return -ENOSPC;
4730
4731 memcpy(priv->buffer + priv->response_len,
4732 &cmd->data.setadapterparms.hdr, resdatalen);
4733 priv->response_len += resdatalen;
4734
4735 if (cmd->data.setadapterparms.hdr.seq_no <
4736 cmd->data.setadapterparms.hdr.used_total)
4737 return 1;
4738 return 0;
4739 }
4740
qeth_query_oat_command(struct qeth_card * card,char __user * udata)4741 static int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
4742 {
4743 int rc = 0;
4744 struct qeth_cmd_buffer *iob;
4745 struct qeth_ipa_cmd *cmd;
4746 struct qeth_query_oat *oat_req;
4747 struct qeth_query_oat_data oat_data;
4748 struct qeth_qoat_priv priv;
4749 void __user *tmp;
4750
4751 QETH_CARD_TEXT(card, 3, "qoatcmd");
4752
4753 if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT))
4754 return -EOPNOTSUPP;
4755
4756 if (copy_from_user(&oat_data, udata, sizeof(oat_data)))
4757 return -EFAULT;
4758
4759 priv.buffer_len = oat_data.buffer_len;
4760 priv.response_len = 0;
4761 priv.buffer = vzalloc(oat_data.buffer_len);
4762 if (!priv.buffer)
4763 return -ENOMEM;
4764
4765 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4766 SETADP_DATA_SIZEOF(query_oat));
4767 if (!iob) {
4768 rc = -ENOMEM;
4769 goto out_free;
4770 }
4771 cmd = __ipa_cmd(iob);
4772 oat_req = &cmd->data.setadapterparms.data.query_oat;
4773 oat_req->subcmd_code = oat_data.command;
4774
4775 rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb, &priv);
4776 if (!rc) {
4777 tmp = is_compat_task() ? compat_ptr(oat_data.ptr) :
4778 u64_to_user_ptr(oat_data.ptr);
4779 oat_data.response_len = priv.response_len;
4780
4781 if (copy_to_user(tmp, priv.buffer, priv.response_len) ||
4782 copy_to_user(udata, &oat_data, sizeof(oat_data)))
4783 rc = -EFAULT;
4784 }
4785
4786 out_free:
4787 vfree(priv.buffer);
4788 return rc;
4789 }
4790
qeth_init_link_info_oat_cb(struct qeth_card * card,struct qeth_reply * reply_priv,unsigned long data)4791 static int qeth_init_link_info_oat_cb(struct qeth_card *card,
4792 struct qeth_reply *reply_priv,
4793 unsigned long data)
4794 {
4795 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4796 struct qeth_link_info *link_info = reply_priv->param;
4797 struct qeth_query_oat_physical_if *phys_if;
4798 struct qeth_query_oat_reply *reply;
4799
4800 QETH_CARD_TEXT(card, 2, "qoatincb");
4801 if (qeth_setadpparms_inspect_rc(cmd))
4802 return -EIO;
4803
4804 /* Multi-part reply is unexpected, don't bother: */
4805 if (cmd->data.setadapterparms.hdr.used_total > 1)
4806 return -EINVAL;
4807
4808 /* Expect the reply to start with phys_if data: */
4809 reply = &cmd->data.setadapterparms.data.query_oat.reply[0];
4810 if (reply->type != QETH_QOAT_REPLY_TYPE_PHYS_IF ||
4811 reply->length < sizeof(*reply))
4812 return -EINVAL;
4813
4814 phys_if = &reply->phys_if;
4815
4816 switch (phys_if->speed_duplex) {
4817 case QETH_QOAT_PHYS_SPEED_10M_HALF:
4818 link_info->speed = SPEED_10;
4819 link_info->duplex = DUPLEX_HALF;
4820 break;
4821 case QETH_QOAT_PHYS_SPEED_10M_FULL:
4822 link_info->speed = SPEED_10;
4823 link_info->duplex = DUPLEX_FULL;
4824 break;
4825 case QETH_QOAT_PHYS_SPEED_100M_HALF:
4826 link_info->speed = SPEED_100;
4827 link_info->duplex = DUPLEX_HALF;
4828 break;
4829 case QETH_QOAT_PHYS_SPEED_100M_FULL:
4830 link_info->speed = SPEED_100;
4831 link_info->duplex = DUPLEX_FULL;
4832 break;
4833 case QETH_QOAT_PHYS_SPEED_1000M_HALF:
4834 link_info->speed = SPEED_1000;
4835 link_info->duplex = DUPLEX_HALF;
4836 break;
4837 case QETH_QOAT_PHYS_SPEED_1000M_FULL:
4838 link_info->speed = SPEED_1000;
4839 link_info->duplex = DUPLEX_FULL;
4840 break;
4841 case QETH_QOAT_PHYS_SPEED_10G_FULL:
4842 link_info->speed = SPEED_10000;
4843 link_info->duplex = DUPLEX_FULL;
4844 break;
4845 case QETH_QOAT_PHYS_SPEED_25G_FULL:
4846 link_info->speed = SPEED_25000;
4847 link_info->duplex = DUPLEX_FULL;
4848 break;
4849 case QETH_QOAT_PHYS_SPEED_UNKNOWN:
4850 default:
4851 link_info->speed = SPEED_UNKNOWN;
4852 link_info->duplex = DUPLEX_UNKNOWN;
4853 break;
4854 }
4855
4856 switch (phys_if->media_type) {
4857 case QETH_QOAT_PHYS_MEDIA_COPPER:
4858 link_info->port = PORT_TP;
4859 link_info->link_mode = QETH_LINK_MODE_UNKNOWN;
4860 break;
4861 case QETH_QOAT_PHYS_MEDIA_FIBRE_SHORT:
4862 link_info->port = PORT_FIBRE;
4863 link_info->link_mode = QETH_LINK_MODE_FIBRE_SHORT;
4864 break;
4865 case QETH_QOAT_PHYS_MEDIA_FIBRE_LONG:
4866 link_info->port = PORT_FIBRE;
4867 link_info->link_mode = QETH_LINK_MODE_FIBRE_LONG;
4868 break;
4869 default:
4870 link_info->port = PORT_OTHER;
4871 link_info->link_mode = QETH_LINK_MODE_UNKNOWN;
4872 break;
4873 }
4874
4875 return 0;
4876 }
4877
qeth_init_link_info(struct qeth_card * card)4878 static void qeth_init_link_info(struct qeth_card *card)
4879 {
4880 qeth_default_link_info(card);
4881
4882 /* Get more accurate data via QUERY OAT: */
4883 if (qeth_adp_supported(card, IPA_SETADP_QUERY_OAT)) {
4884 struct qeth_link_info link_info;
4885 struct qeth_cmd_buffer *iob;
4886
4887 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4888 SETADP_DATA_SIZEOF(query_oat));
4889 if (iob) {
4890 struct qeth_ipa_cmd *cmd = __ipa_cmd(iob);
4891 struct qeth_query_oat *oat_req;
4892
4893 oat_req = &cmd->data.setadapterparms.data.query_oat;
4894 oat_req->subcmd_code = QETH_QOAT_SCOPE_INTERFACE;
4895
4896 if (!qeth_send_ipa_cmd(card, iob,
4897 qeth_init_link_info_oat_cb,
4898 &link_info)) {
4899 if (link_info.speed != SPEED_UNKNOWN)
4900 card->info.link_info.speed = link_info.speed;
4901 if (link_info.duplex != DUPLEX_UNKNOWN)
4902 card->info.link_info.duplex = link_info.duplex;
4903 if (link_info.port != PORT_OTHER)
4904 card->info.link_info.port = link_info.port;
4905 if (link_info.link_mode != QETH_LINK_MODE_UNKNOWN)
4906 card->info.link_info.link_mode = link_info.link_mode;
4907 }
4908 }
4909 }
4910 }
4911
4912 /**
4913 * qeth_vm_request_mac() - Request a hypervisor-managed MAC address
4914 * @card: pointer to a qeth_card
4915 *
4916 * Returns
4917 * 0, if a MAC address has been set for the card's netdevice
4918 * a return code, for various error conditions
4919 */
qeth_vm_request_mac(struct qeth_card * card)4920 int qeth_vm_request_mac(struct qeth_card *card)
4921 {
4922 struct diag26c_mac_resp *response;
4923 struct diag26c_mac_req *request;
4924 int rc;
4925
4926 QETH_CARD_TEXT(card, 2, "vmreqmac");
4927
4928 request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
4929 response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
4930 if (!request || !response) {
4931 rc = -ENOMEM;
4932 goto out;
4933 }
4934
4935 request->resp_buf_len = sizeof(*response);
4936 request->resp_version = DIAG26C_VERSION2;
4937 request->op_code = DIAG26C_GET_MAC;
4938 request->devno = card->info.ddev_devno;
4939
4940 QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4941 rc = diag26c(request, response, DIAG26C_MAC_SERVICES);
4942 QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4943 if (rc)
4944 goto out;
4945 QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
4946
4947 if (request->resp_buf_len < sizeof(*response) ||
4948 response->version != request->resp_version) {
4949 rc = -EIO;
4950 QETH_CARD_TEXT(card, 2, "badresp");
4951 QETH_CARD_HEX(card, 2, &request->resp_buf_len,
4952 sizeof(request->resp_buf_len));
4953 } else if (!is_valid_ether_addr(response->mac)) {
4954 rc = -EINVAL;
4955 QETH_CARD_TEXT(card, 2, "badmac");
4956 QETH_CARD_HEX(card, 2, response->mac, ETH_ALEN);
4957 } else {
4958 eth_hw_addr_set(card->dev, response->mac);
4959 }
4960
4961 out:
4962 kfree(response);
4963 kfree(request);
4964 return rc;
4965 }
4966 EXPORT_SYMBOL_GPL(qeth_vm_request_mac);
4967
qeth_determine_capabilities(struct qeth_card * card)4968 static void qeth_determine_capabilities(struct qeth_card *card)
4969 {
4970 struct qeth_channel *channel = &card->data;
4971 struct ccw_device *ddev = channel->ccwdev;
4972 int rc;
4973 int ddev_offline = 0;
4974
4975 QETH_CARD_TEXT(card, 2, "detcapab");
4976 if (!ddev->online) {
4977 ddev_offline = 1;
4978 rc = qeth_start_channel(channel);
4979 if (rc) {
4980 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
4981 goto out;
4982 }
4983 }
4984
4985 rc = qeth_read_conf_data(card);
4986 if (rc) {
4987 QETH_DBF_MESSAGE(2, "qeth_read_conf_data on device %x returned %i\n",
4988 CARD_DEVID(card), rc);
4989 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
4990 goto out_offline;
4991 }
4992
4993 rc = qdio_get_ssqd_desc(ddev, &card->ssqd);
4994 if (rc)
4995 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
4996
4997 QETH_CARD_TEXT_(card, 2, "qfmt%d", card->ssqd.qfmt);
4998 QETH_CARD_TEXT_(card, 2, "ac1:%02x", card->ssqd.qdioac1);
4999 QETH_CARD_TEXT_(card, 2, "ac2:%04x", card->ssqd.qdioac2);
5000 QETH_CARD_TEXT_(card, 2, "ac3:%04x", card->ssqd.qdioac3);
5001 QETH_CARD_TEXT_(card, 2, "icnt%d", card->ssqd.icnt);
5002 if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) ||
5003 ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) ||
5004 ((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) {
5005 dev_info(&card->gdev->dev,
5006 "Completion Queueing supported\n");
5007 } else {
5008 card->options.cq = QETH_CQ_NOTAVAILABLE;
5009 }
5010
5011 out_offline:
5012 if (ddev_offline == 1)
5013 qeth_stop_channel(channel);
5014 out:
5015 return;
5016 }
5017
qeth_read_ccw_conf_data(struct qeth_card * card)5018 static void qeth_read_ccw_conf_data(struct qeth_card *card)
5019 {
5020 struct qeth_card_info *info = &card->info;
5021 struct ccw_device *cdev = CARD_DDEV(card);
5022 struct ccw_dev_id dev_id;
5023
5024 QETH_CARD_TEXT(card, 2, "ccwconfd");
5025 ccw_device_get_id(cdev, &dev_id);
5026
5027 info->ddev_devno = dev_id.devno;
5028 info->ids_valid = !ccw_device_get_cssid(cdev, &info->cssid) &&
5029 !ccw_device_get_iid(cdev, &info->iid) &&
5030 !ccw_device_get_chid(cdev, 0, &info->chid);
5031 info->ssid = dev_id.ssid;
5032
5033 dev_info(&card->gdev->dev, "CHID: %x CHPID: %x\n",
5034 info->chid, info->chpid);
5035
5036 QETH_CARD_TEXT_(card, 3, "devn%x", info->ddev_devno);
5037 QETH_CARD_TEXT_(card, 3, "cssid:%x", info->cssid);
5038 QETH_CARD_TEXT_(card, 3, "iid:%x", info->iid);
5039 QETH_CARD_TEXT_(card, 3, "ssid:%x", info->ssid);
5040 QETH_CARD_TEXT_(card, 3, "chpid:%x", info->chpid);
5041 QETH_CARD_TEXT_(card, 3, "chid:%x", info->chid);
5042 QETH_CARD_TEXT_(card, 3, "idval%x", info->ids_valid);
5043 }
5044
qeth_qdio_establish(struct qeth_card * card)5045 static int qeth_qdio_establish(struct qeth_card *card)
5046 {
5047 struct qdio_buffer **out_sbal_ptrs[QETH_MAX_OUT_QUEUES];
5048 struct qdio_buffer **in_sbal_ptrs[QETH_MAX_IN_QUEUES];
5049 struct qeth_qib_parms *qib_parms = NULL;
5050 struct qdio_initialize init_data;
5051 unsigned int no_input_qs = 1;
5052 unsigned int i;
5053 int rc = 0;
5054
5055 QETH_CARD_TEXT(card, 2, "qdioest");
5056
5057 if (!IS_IQD(card) && !IS_VM_NIC(card)) {
5058 qib_parms = kzalloc(sizeof_field(struct qib, parm), GFP_KERNEL);
5059 if (!qib_parms)
5060 return -ENOMEM;
5061
5062 qeth_fill_qib_parms(card, qib_parms);
5063 }
5064
5065 in_sbal_ptrs[0] = card->qdio.in_q->qdio_bufs;
5066 if (card->options.cq == QETH_CQ_ENABLED) {
5067 in_sbal_ptrs[1] = card->qdio.c_q->qdio_bufs;
5068 no_input_qs++;
5069 }
5070
5071 for (i = 0; i < card->qdio.no_out_queues; i++)
5072 out_sbal_ptrs[i] = card->qdio.out_qs[i]->qdio_bufs;
5073
5074 memset(&init_data, 0, sizeof(struct qdio_initialize));
5075 init_data.q_format = IS_IQD(card) ? QDIO_IQDIO_QFMT :
5076 QDIO_QETH_QFMT;
5077 init_data.qib_param_field_format = 0;
5078 init_data.qib_param_field = (void *)qib_parms;
5079 init_data.no_input_qs = no_input_qs;
5080 init_data.no_output_qs = card->qdio.no_out_queues;
5081 init_data.input_handler = qeth_qdio_input_handler;
5082 init_data.output_handler = qeth_qdio_output_handler;
5083 init_data.irq_poll = qeth_qdio_poll;
5084 init_data.int_parm = (unsigned long) card;
5085 init_data.input_sbal_addr_array = in_sbal_ptrs;
5086 init_data.output_sbal_addr_array = out_sbal_ptrs;
5087
5088 if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED,
5089 QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) {
5090 rc = qdio_allocate(CARD_DDEV(card), init_data.no_input_qs,
5091 init_data.no_output_qs);
5092 if (rc) {
5093 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5094 goto out;
5095 }
5096 rc = qdio_establish(CARD_DDEV(card), &init_data);
5097 if (rc) {
5098 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5099 qdio_free(CARD_DDEV(card));
5100 }
5101 }
5102
5103 switch (card->options.cq) {
5104 case QETH_CQ_ENABLED:
5105 dev_info(&card->gdev->dev, "Completion Queue support enabled");
5106 break;
5107 case QETH_CQ_DISABLED:
5108 dev_info(&card->gdev->dev, "Completion Queue support disabled");
5109 break;
5110 default:
5111 break;
5112 }
5113
5114 out:
5115 kfree(qib_parms);
5116 return rc;
5117 }
5118
qeth_core_free_card(struct qeth_card * card)5119 static void qeth_core_free_card(struct qeth_card *card)
5120 {
5121 QETH_CARD_TEXT(card, 2, "freecrd");
5122
5123 unregister_service_level(&card->qeth_service_level);
5124 debugfs_remove_recursive(card->debugfs);
5125 qeth_put_cmd(card->read_cmd);
5126 destroy_workqueue(card->event_wq);
5127 dev_set_drvdata(&card->gdev->dev, NULL);
5128 kfree(card);
5129 }
5130
qeth_trace_features(struct qeth_card * card)5131 static void qeth_trace_features(struct qeth_card *card)
5132 {
5133 QETH_CARD_TEXT(card, 2, "features");
5134 QETH_CARD_HEX(card, 2, &card->options.ipa4, sizeof(card->options.ipa4));
5135 QETH_CARD_HEX(card, 2, &card->options.ipa6, sizeof(card->options.ipa6));
5136 QETH_CARD_HEX(card, 2, &card->options.adp, sizeof(card->options.adp));
5137 QETH_CARD_HEX(card, 2, &card->info.diagass_support,
5138 sizeof(card->info.diagass_support));
5139 }
5140
5141 static struct ccw_device_id qeth_ids[] = {
5142 {CCW_DEVICE_DEVTYPE(0x1731, 0x01, 0x1732, 0x01),
5143 .driver_info = QETH_CARD_TYPE_OSD},
5144 {CCW_DEVICE_DEVTYPE(0x1731, 0x05, 0x1732, 0x05),
5145 .driver_info = QETH_CARD_TYPE_IQD},
5146 {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x03),
5147 .driver_info = QETH_CARD_TYPE_OSM},
5148 #ifdef CONFIG_QETH_OSX
5149 {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02),
5150 .driver_info = QETH_CARD_TYPE_OSX},
5151 #endif
5152 {},
5153 };
5154 MODULE_DEVICE_TABLE(ccw, qeth_ids);
5155
5156 static struct ccw_driver qeth_ccw_driver = {
5157 .driver = {
5158 .owner = THIS_MODULE,
5159 .name = "qeth",
5160 },
5161 .ids = qeth_ids,
5162 .probe = ccwgroup_probe_ccwdev,
5163 .remove = ccwgroup_remove_ccwdev,
5164 };
5165
qeth_hardsetup_card(struct qeth_card * card,bool * carrier_ok)5166 static int qeth_hardsetup_card(struct qeth_card *card, bool *carrier_ok)
5167 {
5168 int retries = 3;
5169 int rc;
5170
5171 QETH_CARD_TEXT(card, 2, "hrdsetup");
5172 atomic_set(&card->force_alloc_skb, 0);
5173 rc = qeth_update_from_chp_desc(card);
5174 if (rc)
5175 return rc;
5176 retry:
5177 if (retries < 3)
5178 QETH_DBF_MESSAGE(2, "Retrying to do IDX activates on device %x.\n",
5179 CARD_DEVID(card));
5180 rc = qeth_qdio_clear_card(card, !IS_IQD(card));
5181 qeth_stop_channel(&card->data);
5182 qeth_stop_channel(&card->write);
5183 qeth_stop_channel(&card->read);
5184 qdio_free(CARD_DDEV(card));
5185
5186 rc = qeth_start_channel(&card->read);
5187 if (rc)
5188 goto retriable;
5189 rc = qeth_start_channel(&card->write);
5190 if (rc)
5191 goto retriable;
5192 rc = qeth_start_channel(&card->data);
5193 if (rc)
5194 goto retriable;
5195 retriable:
5196 if (rc == -ERESTARTSYS) {
5197 QETH_CARD_TEXT(card, 2, "break1");
5198 return rc;
5199 } else if (rc) {
5200 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
5201 if (--retries < 0)
5202 goto out;
5203 else
5204 goto retry;
5205 }
5206
5207 qeth_determine_capabilities(card);
5208 qeth_read_ccw_conf_data(card);
5209 qeth_idx_init(card);
5210
5211 rc = qeth_idx_activate_read_channel(card);
5212 if (rc == -EINTR) {
5213 QETH_CARD_TEXT(card, 2, "break2");
5214 return rc;
5215 } else if (rc) {
5216 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
5217 if (--retries < 0)
5218 goto out;
5219 else
5220 goto retry;
5221 }
5222
5223 rc = qeth_idx_activate_write_channel(card);
5224 if (rc == -EINTR) {
5225 QETH_CARD_TEXT(card, 2, "break3");
5226 return rc;
5227 } else if (rc) {
5228 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
5229 if (--retries < 0)
5230 goto out;
5231 else
5232 goto retry;
5233 }
5234 card->read_or_write_problem = 0;
5235 rc = qeth_mpc_initialize(card);
5236 if (rc) {
5237 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
5238 goto out;
5239 }
5240
5241 rc = qeth_send_startlan(card);
5242 if (rc) {
5243 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
5244 if (rc == -ENETDOWN) {
5245 dev_warn(&card->gdev->dev, "The LAN is offline\n");
5246 *carrier_ok = false;
5247 } else {
5248 goto out;
5249 }
5250 } else {
5251 *carrier_ok = true;
5252 }
5253
5254 card->options.ipa4.supported = 0;
5255 card->options.ipa6.supported = 0;
5256 card->options.adp.supported = 0;
5257 card->options.sbp.supported_funcs = 0;
5258 card->info.diagass_support = 0;
5259 rc = qeth_query_ipassists(card, QETH_PROT_IPV4);
5260 if (rc == -ENOMEM)
5261 goto out;
5262 if (qeth_is_supported(card, IPA_IPV6)) {
5263 rc = qeth_query_ipassists(card, QETH_PROT_IPV6);
5264 if (rc == -ENOMEM)
5265 goto out;
5266 }
5267 if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
5268 rc = qeth_query_setadapterparms(card);
5269 if (rc < 0) {
5270 QETH_CARD_TEXT_(card, 2, "7err%d", rc);
5271 goto out;
5272 }
5273 }
5274 if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
5275 rc = qeth_query_setdiagass(card);
5276 if (rc)
5277 QETH_CARD_TEXT_(card, 2, "8err%d", rc);
5278 }
5279
5280 qeth_trace_features(card);
5281
5282 if (!qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP) ||
5283 (card->info.hwtrap && qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM)))
5284 card->info.hwtrap = 0;
5285
5286 if (card->options.isolation != ISOLATION_MODE_NONE) {
5287 rc = qeth_setadpparms_set_access_ctrl(card,
5288 card->options.isolation);
5289 if (rc)
5290 goto out;
5291 }
5292
5293 qeth_init_link_info(card);
5294
5295 rc = qeth_init_qdio_queues(card);
5296 if (rc) {
5297 QETH_CARD_TEXT_(card, 2, "9err%d", rc);
5298 goto out;
5299 }
5300
5301 return 0;
5302 out:
5303 dev_warn(&card->gdev->dev, "The qeth device driver failed to recover "
5304 "an error on the device\n");
5305 QETH_DBF_MESSAGE(2, "Initialization for device %x failed in hardsetup! rc=%d\n",
5306 CARD_DEVID(card), rc);
5307 return rc;
5308 }
5309
qeth_set_online(struct qeth_card * card,const struct qeth_discipline * disc)5310 static int qeth_set_online(struct qeth_card *card,
5311 const struct qeth_discipline *disc)
5312 {
5313 bool carrier_ok;
5314 int rc;
5315
5316 mutex_lock(&card->conf_mutex);
5317 QETH_CARD_TEXT(card, 2, "setonlin");
5318
5319 rc = qeth_hardsetup_card(card, &carrier_ok);
5320 if (rc) {
5321 QETH_CARD_TEXT_(card, 2, "2err%04x", rc);
5322 rc = -ENODEV;
5323 goto err_hardsetup;
5324 }
5325
5326 qeth_print_status_message(card);
5327
5328 if (card->dev->reg_state != NETREG_REGISTERED)
5329 /* no need for locking / error handling at this early stage: */
5330 qeth_set_real_num_tx_queues(card, qeth_tx_actual_queues(card));
5331
5332 rc = disc->set_online(card, carrier_ok);
5333 if (rc)
5334 goto err_online;
5335
5336 /* let user_space know that device is online */
5337 kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE);
5338
5339 mutex_unlock(&card->conf_mutex);
5340 return 0;
5341
5342 err_online:
5343 err_hardsetup:
5344 qeth_qdio_clear_card(card, 0);
5345 qeth_clear_working_pool_list(card);
5346 qeth_flush_local_addrs(card);
5347
5348 qeth_stop_channel(&card->data);
5349 qeth_stop_channel(&card->write);
5350 qeth_stop_channel(&card->read);
5351 qdio_free(CARD_DDEV(card));
5352
5353 mutex_unlock(&card->conf_mutex);
5354 return rc;
5355 }
5356
qeth_set_offline(struct qeth_card * card,const struct qeth_discipline * disc,bool resetting)5357 int qeth_set_offline(struct qeth_card *card, const struct qeth_discipline *disc,
5358 bool resetting)
5359 {
5360 int rc, rc2, rc3;
5361
5362 mutex_lock(&card->conf_mutex);
5363 QETH_CARD_TEXT(card, 3, "setoffl");
5364
5365 if ((!resetting && card->info.hwtrap) || card->info.hwtrap == 2) {
5366 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
5367 card->info.hwtrap = 1;
5368 }
5369
5370 /* cancel any stalled cmd that might block the rtnl: */
5371 qeth_clear_ipacmd_list(card);
5372
5373 rtnl_lock();
5374 card->info.open_when_online = card->dev->flags & IFF_UP;
5375 dev_close(card->dev);
5376 netif_device_detach(card->dev);
5377 netif_carrier_off(card->dev);
5378 rtnl_unlock();
5379
5380 cancel_work_sync(&card->rx_mode_work);
5381
5382 disc->set_offline(card);
5383
5384 qeth_qdio_clear_card(card, 0);
5385 qeth_drain_output_queues(card);
5386 qeth_clear_working_pool_list(card);
5387 qeth_flush_local_addrs(card);
5388 card->info.promisc_mode = 0;
5389 qeth_default_link_info(card);
5390
5391 rc = qeth_stop_channel(&card->data);
5392 rc2 = qeth_stop_channel(&card->write);
5393 rc3 = qeth_stop_channel(&card->read);
5394 if (!rc)
5395 rc = (rc2) ? rc2 : rc3;
5396 if (rc)
5397 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
5398 qdio_free(CARD_DDEV(card));
5399
5400 /* let user_space know that device is offline */
5401 kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE);
5402
5403 mutex_unlock(&card->conf_mutex);
5404 return 0;
5405 }
5406 EXPORT_SYMBOL_GPL(qeth_set_offline);
5407
qeth_do_reset(void * data)5408 static int qeth_do_reset(void *data)
5409 {
5410 const struct qeth_discipline *disc;
5411 struct qeth_card *card = data;
5412 int rc;
5413
5414 /* Lock-free, other users will block until we are done. */
5415 disc = card->discipline;
5416
5417 QETH_CARD_TEXT(card, 2, "recover1");
5418 if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
5419 return 0;
5420 QETH_CARD_TEXT(card, 2, "recover2");
5421 dev_warn(&card->gdev->dev,
5422 "A recovery process has been started for the device\n");
5423
5424 qeth_set_offline(card, disc, true);
5425 rc = qeth_set_online(card, disc);
5426 if (!rc) {
5427 dev_info(&card->gdev->dev,
5428 "Device successfully recovered!\n");
5429 } else {
5430 qeth_set_offline(card, disc, true);
5431 ccwgroup_set_offline(card->gdev, false);
5432 dev_warn(&card->gdev->dev,
5433 "The qeth device driver failed to recover an error on the device\n");
5434 }
5435 qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
5436 qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
5437 return 0;
5438 }
5439
5440 #if IS_ENABLED(CONFIG_QETH_L3)
qeth_l3_rebuild_skb(struct qeth_card * card,struct sk_buff * skb,struct qeth_hdr * hdr)5441 static void qeth_l3_rebuild_skb(struct qeth_card *card, struct sk_buff *skb,
5442 struct qeth_hdr *hdr)
5443 {
5444 struct af_iucv_trans_hdr *iucv = (struct af_iucv_trans_hdr *) skb->data;
5445 struct qeth_hdr_layer3 *l3_hdr = &hdr->hdr.l3;
5446 struct net_device *dev = skb->dev;
5447
5448 if (IS_IQD(card) && iucv->magic == ETH_P_AF_IUCV) {
5449 dev_hard_header(skb, dev, ETH_P_AF_IUCV, dev->dev_addr,
5450 "FAKELL", skb->len);
5451 return;
5452 }
5453
5454 if (!(l3_hdr->flags & QETH_HDR_PASSTHRU)) {
5455 u16 prot = (l3_hdr->flags & QETH_HDR_IPV6) ? ETH_P_IPV6 :
5456 ETH_P_IP;
5457 unsigned char tg_addr[ETH_ALEN];
5458
5459 skb_reset_network_header(skb);
5460 switch (l3_hdr->flags & QETH_HDR_CAST_MASK) {
5461 case QETH_CAST_MULTICAST:
5462 if (prot == ETH_P_IP)
5463 ip_eth_mc_map(ip_hdr(skb)->daddr, tg_addr);
5464 else
5465 ipv6_eth_mc_map(&ipv6_hdr(skb)->daddr, tg_addr);
5466 QETH_CARD_STAT_INC(card, rx_multicast);
5467 break;
5468 case QETH_CAST_BROADCAST:
5469 ether_addr_copy(tg_addr, dev->broadcast);
5470 QETH_CARD_STAT_INC(card, rx_multicast);
5471 break;
5472 default:
5473 if (card->options.sniffer)
5474 skb->pkt_type = PACKET_OTHERHOST;
5475 ether_addr_copy(tg_addr, dev->dev_addr);
5476 }
5477
5478 if (l3_hdr->ext_flags & QETH_HDR_EXT_SRC_MAC_ADDR)
5479 dev_hard_header(skb, dev, prot, tg_addr,
5480 &l3_hdr->next_hop.rx.src_mac, skb->len);
5481 else
5482 dev_hard_header(skb, dev, prot, tg_addr, "FAKELL",
5483 skb->len);
5484 }
5485
5486 /* copy VLAN tag from hdr into skb */
5487 if (!card->options.sniffer &&
5488 (l3_hdr->ext_flags & (QETH_HDR_EXT_VLAN_FRAME |
5489 QETH_HDR_EXT_INCLUDE_VLAN_TAG))) {
5490 u16 tag = (l3_hdr->ext_flags & QETH_HDR_EXT_VLAN_FRAME) ?
5491 l3_hdr->vlan_id :
5492 l3_hdr->next_hop.rx.vlan_id;
5493
5494 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag);
5495 }
5496 }
5497 #endif
5498
qeth_receive_skb(struct qeth_card * card,struct sk_buff * skb,bool uses_frags,bool is_cso)5499 static void qeth_receive_skb(struct qeth_card *card, struct sk_buff *skb,
5500 bool uses_frags, bool is_cso)
5501 {
5502 struct napi_struct *napi = &card->napi;
5503
5504 if (is_cso && (card->dev->features & NETIF_F_RXCSUM)) {
5505 skb->ip_summed = CHECKSUM_UNNECESSARY;
5506 QETH_CARD_STAT_INC(card, rx_skb_csum);
5507 } else {
5508 skb->ip_summed = CHECKSUM_NONE;
5509 }
5510
5511 QETH_CARD_STAT_ADD(card, rx_bytes, skb->len);
5512 QETH_CARD_STAT_INC(card, rx_packets);
5513 if (skb_is_nonlinear(skb)) {
5514 QETH_CARD_STAT_INC(card, rx_sg_skbs);
5515 QETH_CARD_STAT_ADD(card, rx_sg_frags,
5516 skb_shinfo(skb)->nr_frags);
5517 }
5518
5519 if (uses_frags) {
5520 napi_gro_frags(napi);
5521 } else {
5522 skb->protocol = eth_type_trans(skb, skb->dev);
5523 napi_gro_receive(napi, skb);
5524 }
5525 }
5526
qeth_create_skb_frag(struct sk_buff * skb,char * data,int data_len)5527 static void qeth_create_skb_frag(struct sk_buff *skb, char *data, int data_len)
5528 {
5529 struct page *page = virt_to_page(data);
5530 unsigned int next_frag;
5531
5532 next_frag = skb_shinfo(skb)->nr_frags;
5533 get_page(page);
5534 skb_add_rx_frag(skb, next_frag, page, offset_in_page(data), data_len,
5535 data_len);
5536 }
5537
qeth_is_last_sbale(struct qdio_buffer_element * sbale)5538 static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale)
5539 {
5540 return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY);
5541 }
5542
qeth_extract_skb(struct qeth_card * card,struct qeth_qdio_buffer * qethbuffer,u8 * element_no,int * __offset)5543 static int qeth_extract_skb(struct qeth_card *card,
5544 struct qeth_qdio_buffer *qethbuffer, u8 *element_no,
5545 int *__offset)
5546 {
5547 struct qeth_priv *priv = netdev_priv(card->dev);
5548 struct qdio_buffer *buffer = qethbuffer->buffer;
5549 struct napi_struct *napi = &card->napi;
5550 struct qdio_buffer_element *element;
5551 unsigned int linear_len = 0;
5552 bool uses_frags = false;
5553 int offset = *__offset;
5554 bool use_rx_sg = false;
5555 unsigned int headroom;
5556 struct qeth_hdr *hdr;
5557 struct sk_buff *skb;
5558 int skb_len = 0;
5559 bool is_cso;
5560
5561 element = &buffer->element[*element_no];
5562
5563 next_packet:
5564 /* qeth_hdr must not cross element boundaries */
5565 while (element->length < offset + sizeof(struct qeth_hdr)) {
5566 if (qeth_is_last_sbale(element))
5567 return -ENODATA;
5568 element++;
5569 offset = 0;
5570 }
5571
5572 hdr = phys_to_virt(element->addr) + offset;
5573 offset += sizeof(*hdr);
5574 skb = NULL;
5575
5576 switch (hdr->hdr.l2.id) {
5577 case QETH_HEADER_TYPE_LAYER2:
5578 skb_len = hdr->hdr.l2.pkt_length;
5579 is_cso = hdr->hdr.l2.flags[1] & QETH_HDR_EXT_CSUM_TRANSP_REQ;
5580
5581 linear_len = ETH_HLEN;
5582 headroom = 0;
5583 break;
5584 case QETH_HEADER_TYPE_LAYER3:
5585 skb_len = hdr->hdr.l3.length;
5586 is_cso = hdr->hdr.l3.ext_flags & QETH_HDR_EXT_CSUM_TRANSP_REQ;
5587
5588 if (!IS_LAYER3(card)) {
5589 QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5590 goto walk_packet;
5591 }
5592
5593 if (hdr->hdr.l3.flags & QETH_HDR_PASSTHRU) {
5594 linear_len = ETH_HLEN;
5595 headroom = 0;
5596 break;
5597 }
5598
5599 if (hdr->hdr.l3.flags & QETH_HDR_IPV6)
5600 linear_len = sizeof(struct ipv6hdr);
5601 else
5602 linear_len = sizeof(struct iphdr);
5603 headroom = ETH_HLEN;
5604 break;
5605 default:
5606 if (hdr->hdr.l2.id & QETH_HEADER_MASK_INVAL)
5607 QETH_CARD_STAT_INC(card, rx_frame_errors);
5608 else
5609 QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5610
5611 /* Can't determine packet length, drop the whole buffer. */
5612 return -EPROTONOSUPPORT;
5613 }
5614
5615 if (skb_len < linear_len) {
5616 QETH_CARD_STAT_INC(card, rx_dropped_runt);
5617 goto walk_packet;
5618 }
5619
5620 use_rx_sg = (card->options.cq == QETH_CQ_ENABLED) ||
5621 (skb_len > READ_ONCE(priv->rx_copybreak) &&
5622 !atomic_read(&card->force_alloc_skb));
5623
5624 if (use_rx_sg) {
5625 /* QETH_CQ_ENABLED only: */
5626 if (qethbuffer->rx_skb &&
5627 skb_tailroom(qethbuffer->rx_skb) >= linear_len + headroom) {
5628 skb = qethbuffer->rx_skb;
5629 qethbuffer->rx_skb = NULL;
5630 goto use_skb;
5631 }
5632
5633 skb = napi_get_frags(napi);
5634 if (!skb) {
5635 /* -ENOMEM, no point in falling back further. */
5636 QETH_CARD_STAT_INC(card, rx_dropped_nomem);
5637 goto walk_packet;
5638 }
5639
5640 if (skb_tailroom(skb) >= linear_len + headroom) {
5641 uses_frags = true;
5642 goto use_skb;
5643 }
5644
5645 netdev_info_once(card->dev,
5646 "Insufficient linear space in NAPI frags skb, need %u but have %u\n",
5647 linear_len + headroom, skb_tailroom(skb));
5648 /* Shouldn't happen. Don't optimize, fall back to linear skb. */
5649 }
5650
5651 linear_len = skb_len;
5652 skb = napi_alloc_skb(napi, linear_len + headroom);
5653 if (!skb) {
5654 QETH_CARD_STAT_INC(card, rx_dropped_nomem);
5655 goto walk_packet;
5656 }
5657
5658 use_skb:
5659 if (headroom)
5660 skb_reserve(skb, headroom);
5661 walk_packet:
5662 while (skb_len) {
5663 int data_len = min(skb_len, (int)(element->length - offset));
5664 char *data = phys_to_virt(element->addr) + offset;
5665
5666 skb_len -= data_len;
5667 offset += data_len;
5668
5669 /* Extract data from current element: */
5670 if (skb && data_len) {
5671 if (linear_len) {
5672 unsigned int copy_len;
5673
5674 copy_len = min_t(unsigned int, linear_len,
5675 data_len);
5676
5677 skb_put_data(skb, data, copy_len);
5678 linear_len -= copy_len;
5679 data_len -= copy_len;
5680 data += copy_len;
5681 }
5682
5683 if (data_len)
5684 qeth_create_skb_frag(skb, data, data_len);
5685 }
5686
5687 /* Step forward to next element: */
5688 if (skb_len) {
5689 if (qeth_is_last_sbale(element)) {
5690 QETH_CARD_TEXT(card, 4, "unexeob");
5691 QETH_CARD_HEX(card, 2, buffer, sizeof(void *));
5692 if (skb) {
5693 if (uses_frags)
5694 napi_free_frags(napi);
5695 else
5696 kfree_skb(skb);
5697 QETH_CARD_STAT_INC(card,
5698 rx_length_errors);
5699 }
5700 return -EMSGSIZE;
5701 }
5702 element++;
5703 offset = 0;
5704 }
5705 }
5706
5707 /* This packet was skipped, go get another one: */
5708 if (!skb)
5709 goto next_packet;
5710
5711 *element_no = element - &buffer->element[0];
5712 *__offset = offset;
5713
5714 #if IS_ENABLED(CONFIG_QETH_L3)
5715 if (hdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER3)
5716 qeth_l3_rebuild_skb(card, skb, hdr);
5717 #endif
5718
5719 qeth_receive_skb(card, skb, uses_frags, is_cso);
5720 return 0;
5721 }
5722
qeth_extract_skbs(struct qeth_card * card,int budget,struct qeth_qdio_buffer * buf,bool * done)5723 static unsigned int qeth_extract_skbs(struct qeth_card *card, int budget,
5724 struct qeth_qdio_buffer *buf, bool *done)
5725 {
5726 unsigned int work_done = 0;
5727
5728 while (budget) {
5729 if (qeth_extract_skb(card, buf, &card->rx.buf_element,
5730 &card->rx.e_offset)) {
5731 *done = true;
5732 break;
5733 }
5734
5735 work_done++;
5736 budget--;
5737 }
5738
5739 return work_done;
5740 }
5741
qeth_rx_poll(struct qeth_card * card,int budget)5742 static unsigned int qeth_rx_poll(struct qeth_card *card, int budget)
5743 {
5744 struct qeth_rx *ctx = &card->rx;
5745 unsigned int work_done = 0;
5746
5747 while (budget > 0) {
5748 struct qeth_qdio_buffer *buffer;
5749 unsigned int skbs_done = 0;
5750 bool done = false;
5751
5752 /* Fetch completed RX buffers: */
5753 if (!card->rx.b_count) {
5754 card->rx.qdio_err = 0;
5755 card->rx.b_count =
5756 qdio_inspect_input_queue(CARD_DDEV(card), 0,
5757 &card->rx.b_index,
5758 &card->rx.qdio_err);
5759 if (card->rx.b_count <= 0) {
5760 card->rx.b_count = 0;
5761 break;
5762 }
5763 }
5764
5765 /* Process one completed RX buffer: */
5766 buffer = &card->qdio.in_q->bufs[card->rx.b_index];
5767 if (!(card->rx.qdio_err &&
5768 qeth_check_qdio_errors(card, buffer->buffer,
5769 card->rx.qdio_err, "qinerr")))
5770 skbs_done = qeth_extract_skbs(card, budget, buffer,
5771 &done);
5772 else
5773 done = true;
5774
5775 work_done += skbs_done;
5776 budget -= skbs_done;
5777
5778 if (done) {
5779 QETH_CARD_STAT_INC(card, rx_bufs);
5780 qeth_put_buffer_pool_entry(card, buffer->pool_entry);
5781 buffer->pool_entry = NULL;
5782 card->rx.b_count--;
5783 ctx->bufs_refill++;
5784 ctx->bufs_refill -= qeth_rx_refill_queue(card,
5785 ctx->bufs_refill);
5786
5787 /* Step forward to next buffer: */
5788 card->rx.b_index = QDIO_BUFNR(card->rx.b_index + 1);
5789 card->rx.buf_element = 0;
5790 card->rx.e_offset = 0;
5791 }
5792 }
5793
5794 return work_done;
5795 }
5796
qeth_cq_poll(struct qeth_card * card)5797 static void qeth_cq_poll(struct qeth_card *card)
5798 {
5799 unsigned int work_done = 0;
5800
5801 while (work_done < QDIO_MAX_BUFFERS_PER_Q) {
5802 unsigned int start, error;
5803 int completed;
5804
5805 completed = qdio_inspect_input_queue(CARD_DDEV(card), 1, &start,
5806 &error);
5807 if (completed <= 0)
5808 return;
5809
5810 qeth_qdio_cq_handler(card, error, 1, start, completed);
5811 work_done += completed;
5812 }
5813 }
5814
qeth_poll(struct napi_struct * napi,int budget)5815 int qeth_poll(struct napi_struct *napi, int budget)
5816 {
5817 struct qeth_card *card = container_of(napi, struct qeth_card, napi);
5818 unsigned int work_done;
5819
5820 work_done = qeth_rx_poll(card, budget);
5821
5822 if (qeth_use_tx_irqs(card)) {
5823 struct qeth_qdio_out_q *queue;
5824 unsigned int i;
5825
5826 qeth_for_each_output_queue(card, queue, i) {
5827 if (!qeth_out_queue_is_empty(queue))
5828 napi_schedule(&queue->napi);
5829 }
5830 }
5831
5832 if (card->options.cq == QETH_CQ_ENABLED)
5833 qeth_cq_poll(card);
5834
5835 if (budget) {
5836 struct qeth_rx *ctx = &card->rx;
5837
5838 /* Process any substantial refill backlog: */
5839 ctx->bufs_refill -= qeth_rx_refill_queue(card, ctx->bufs_refill);
5840
5841 /* Exhausted the RX budget. Keep IRQ disabled, we get called again. */
5842 if (work_done >= budget)
5843 return work_done;
5844 }
5845
5846 if (napi_complete_done(napi, work_done) &&
5847 qdio_start_irq(CARD_DDEV(card)))
5848 napi_schedule(napi);
5849
5850 return work_done;
5851 }
5852 EXPORT_SYMBOL_GPL(qeth_poll);
5853
qeth_iqd_tx_complete(struct qeth_qdio_out_q * queue,unsigned int bidx,unsigned int qdio_error,int budget)5854 static void qeth_iqd_tx_complete(struct qeth_qdio_out_q *queue,
5855 unsigned int bidx, unsigned int qdio_error,
5856 int budget)
5857 {
5858 struct qeth_qdio_out_buffer *buffer = queue->bufs[bidx];
5859 u8 sflags = buffer->buffer->element[15].sflags;
5860 struct qeth_card *card = queue->card;
5861 bool error = !!qdio_error;
5862
5863 if (qdio_error == QDIO_ERROR_SLSB_PENDING) {
5864 struct qaob *aob = buffer->aob;
5865 struct qeth_qaob_priv1 *priv;
5866 enum iucv_tx_notify notify;
5867
5868 if (!aob) {
5869 netdev_WARN_ONCE(card->dev,
5870 "Pending TX buffer %#x without QAOB on TX queue %u\n",
5871 bidx, queue->queue_no);
5872 qeth_schedule_recovery(card);
5873 return;
5874 }
5875
5876 QETH_CARD_TEXT_(card, 5, "pel%u", bidx);
5877
5878 priv = (struct qeth_qaob_priv1 *)&aob->user1;
5879 /* QAOB hasn't completed yet: */
5880 if (xchg(&priv->state, QETH_QAOB_PENDING) != QETH_QAOB_DONE) {
5881 qeth_notify_skbs(queue, buffer, TX_NOTIFY_PENDING);
5882
5883 /* Prepare the queue slot for immediate re-use: */
5884 qeth_scrub_qdio_buffer(buffer->buffer, queue->max_elements);
5885 if (qeth_alloc_out_buf(queue, bidx, GFP_ATOMIC)) {
5886 QETH_CARD_TEXT(card, 2, "outofbuf");
5887 qeth_schedule_recovery(card);
5888 }
5889
5890 list_add(&buffer->list_entry, &queue->pending_bufs);
5891 /* Skip clearing the buffer: */
5892 return;
5893 }
5894
5895 /* QAOB already completed: */
5896 notify = qeth_compute_cq_notification(aob->aorc, 0);
5897 qeth_notify_skbs(queue, buffer, notify);
5898 error = !!aob->aorc;
5899 memset(aob, 0, sizeof(*aob));
5900 } else if (card->options.cq == QETH_CQ_ENABLED) {
5901 qeth_notify_skbs(queue, buffer,
5902 qeth_compute_cq_notification(sflags, 0));
5903 }
5904
5905 qeth_clear_output_buffer(queue, buffer, error, budget);
5906 }
5907
qeth_tx_poll(struct napi_struct * napi,int budget)5908 static int qeth_tx_poll(struct napi_struct *napi, int budget)
5909 {
5910 struct qeth_qdio_out_q *queue = qeth_napi_to_out_queue(napi);
5911 unsigned int queue_no = queue->queue_no;
5912 struct qeth_card *card = queue->card;
5913 struct net_device *dev = card->dev;
5914 unsigned int work_done = 0;
5915 struct netdev_queue *txq;
5916
5917 if (IS_IQD(card))
5918 txq = netdev_get_tx_queue(dev, qeth_iqd_translate_txq(dev, queue_no));
5919 else
5920 txq = netdev_get_tx_queue(dev, queue_no);
5921
5922 while (1) {
5923 unsigned int start, error, i;
5924 unsigned int packets = 0;
5925 unsigned int bytes = 0;
5926 int completed;
5927
5928 qeth_tx_complete_pending_bufs(card, queue, false, budget);
5929
5930 if (qeth_out_queue_is_empty(queue)) {
5931 napi_complete(napi);
5932 return 0;
5933 }
5934
5935 /* Give the CPU a breather: */
5936 if (work_done >= QDIO_MAX_BUFFERS_PER_Q) {
5937 QETH_TXQ_STAT_INC(queue, completion_yield);
5938 if (napi_complete_done(napi, 0))
5939 napi_schedule(napi);
5940 return 0;
5941 }
5942
5943 completed = qdio_inspect_output_queue(CARD_DDEV(card), queue_no,
5944 &start, &error);
5945 if (completed <= 0) {
5946 /* Ensure we see TX completion for pending work: */
5947 if (napi_complete_done(napi, 0) &&
5948 !atomic_read(&queue->set_pci_flags_count))
5949 qeth_tx_arm_timer(queue, queue->rescan_usecs);
5950 return 0;
5951 }
5952
5953 for (i = start; i < start + completed; i++) {
5954 struct qeth_qdio_out_buffer *buffer;
5955 unsigned int bidx = QDIO_BUFNR(i);
5956
5957 buffer = queue->bufs[bidx];
5958 packets += buffer->frames;
5959 bytes += buffer->bytes;
5960
5961 qeth_handle_send_error(card, buffer, error);
5962 if (IS_IQD(card))
5963 qeth_iqd_tx_complete(queue, bidx, error, budget);
5964 else
5965 qeth_clear_output_buffer(queue, buffer, error,
5966 budget);
5967 }
5968
5969 atomic_sub(completed, &queue->used_buffers);
5970 work_done += completed;
5971 if (IS_IQD(card))
5972 netdev_tx_completed_queue(txq, packets, bytes);
5973 else
5974 qeth_check_outbound_queue(queue);
5975
5976 /* xmit may have observed the full-condition, but not yet
5977 * stopped the txq. In which case the code below won't trigger.
5978 * So before returning, xmit will re-check the txq's fill level
5979 * and wake it up if needed.
5980 */
5981 if (netif_tx_queue_stopped(txq) &&
5982 !qeth_out_queue_is_full(queue))
5983 netif_tx_wake_queue(txq);
5984 }
5985 }
5986
qeth_setassparms_inspect_rc(struct qeth_ipa_cmd * cmd)5987 static int qeth_setassparms_inspect_rc(struct qeth_ipa_cmd *cmd)
5988 {
5989 if (!cmd->hdr.return_code)
5990 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
5991 return cmd->hdr.return_code;
5992 }
5993
qeth_setassparms_get_caps_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)5994 static int qeth_setassparms_get_caps_cb(struct qeth_card *card,
5995 struct qeth_reply *reply,
5996 unsigned long data)
5997 {
5998 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5999 struct qeth_ipa_caps *caps = reply->param;
6000
6001 if (qeth_setassparms_inspect_rc(cmd))
6002 return -EIO;
6003
6004 caps->supported = cmd->data.setassparms.data.caps.supported;
6005 caps->enabled = cmd->data.setassparms.data.caps.enabled;
6006 return 0;
6007 }
6008
qeth_setassparms_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)6009 int qeth_setassparms_cb(struct qeth_card *card,
6010 struct qeth_reply *reply, unsigned long data)
6011 {
6012 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6013
6014 QETH_CARD_TEXT(card, 4, "defadpcb");
6015
6016 if (cmd->hdr.return_code)
6017 return -EIO;
6018
6019 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
6020 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
6021 card->options.ipa4.enabled = cmd->hdr.assists.enabled;
6022 if (cmd->hdr.prot_version == QETH_PROT_IPV6)
6023 card->options.ipa6.enabled = cmd->hdr.assists.enabled;
6024 return 0;
6025 }
6026 EXPORT_SYMBOL_GPL(qeth_setassparms_cb);
6027
qeth_get_setassparms_cmd(struct qeth_card * card,enum qeth_ipa_funcs ipa_func,u16 cmd_code,unsigned int data_length,enum qeth_prot_versions prot)6028 struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card,
6029 enum qeth_ipa_funcs ipa_func,
6030 u16 cmd_code,
6031 unsigned int data_length,
6032 enum qeth_prot_versions prot)
6033 {
6034 struct qeth_ipacmd_setassparms *setassparms;
6035 struct qeth_ipacmd_setassparms_hdr *hdr;
6036 struct qeth_cmd_buffer *iob;
6037
6038 QETH_CARD_TEXT(card, 4, "getasscm");
6039 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETASSPARMS, prot,
6040 data_length +
6041 offsetof(struct qeth_ipacmd_setassparms,
6042 data));
6043 if (!iob)
6044 return NULL;
6045
6046 setassparms = &__ipa_cmd(iob)->data.setassparms;
6047 setassparms->assist_no = ipa_func;
6048
6049 hdr = &setassparms->hdr;
6050 hdr->length = sizeof(*hdr) + data_length;
6051 hdr->command_code = cmd_code;
6052 return iob;
6053 }
6054 EXPORT_SYMBOL_GPL(qeth_get_setassparms_cmd);
6055
qeth_send_simple_setassparms_prot(struct qeth_card * card,enum qeth_ipa_funcs ipa_func,u16 cmd_code,u32 * data,enum qeth_prot_versions prot)6056 int qeth_send_simple_setassparms_prot(struct qeth_card *card,
6057 enum qeth_ipa_funcs ipa_func,
6058 u16 cmd_code, u32 *data,
6059 enum qeth_prot_versions prot)
6060 {
6061 unsigned int length = data ? SETASS_DATA_SIZEOF(flags_32bit) : 0;
6062 struct qeth_cmd_buffer *iob;
6063
6064 QETH_CARD_TEXT_(card, 4, "simassp%i", prot);
6065 iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code, length, prot);
6066 if (!iob)
6067 return -ENOMEM;
6068
6069 if (data)
6070 __ipa_cmd(iob)->data.setassparms.data.flags_32bit = *data;
6071 return qeth_send_ipa_cmd(card, iob, qeth_setassparms_cb, NULL);
6072 }
6073 EXPORT_SYMBOL_GPL(qeth_send_simple_setassparms_prot);
6074
qeth_unregister_dbf_views(void)6075 static void qeth_unregister_dbf_views(void)
6076 {
6077 int x;
6078
6079 for (x = 0; x < QETH_DBF_INFOS; x++) {
6080 debug_unregister(qeth_dbf[x].id);
6081 qeth_dbf[x].id = NULL;
6082 }
6083 }
6084
qeth_dbf_longtext(debug_info_t * id,int level,char * fmt,...)6085 void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...)
6086 {
6087 char dbf_txt_buf[32];
6088 va_list args;
6089
6090 if (!debug_level_enabled(id, level))
6091 return;
6092 va_start(args, fmt);
6093 vsnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
6094 va_end(args);
6095 debug_text_event(id, level, dbf_txt_buf);
6096 }
6097 EXPORT_SYMBOL_GPL(qeth_dbf_longtext);
6098
qeth_register_dbf_views(void)6099 static int qeth_register_dbf_views(void)
6100 {
6101 int ret;
6102 int x;
6103
6104 for (x = 0; x < QETH_DBF_INFOS; x++) {
6105 /* register the areas */
6106 qeth_dbf[x].id = debug_register(qeth_dbf[x].name,
6107 qeth_dbf[x].pages,
6108 qeth_dbf[x].areas,
6109 qeth_dbf[x].len);
6110 if (qeth_dbf[x].id == NULL) {
6111 qeth_unregister_dbf_views();
6112 return -ENOMEM;
6113 }
6114
6115 /* register a view */
6116 ret = debug_register_view(qeth_dbf[x].id, qeth_dbf[x].view);
6117 if (ret) {
6118 qeth_unregister_dbf_views();
6119 return ret;
6120 }
6121
6122 /* set a passing level */
6123 debug_set_level(qeth_dbf[x].id, qeth_dbf[x].level);
6124 }
6125
6126 return 0;
6127 }
6128
6129 static DEFINE_MUTEX(qeth_mod_mutex); /* for synchronized module loading */
6130
qeth_setup_discipline(struct qeth_card * card,enum qeth_discipline_id discipline)6131 int qeth_setup_discipline(struct qeth_card *card,
6132 enum qeth_discipline_id discipline)
6133 {
6134 int rc;
6135
6136 mutex_lock(&qeth_mod_mutex);
6137 switch (discipline) {
6138 case QETH_DISCIPLINE_LAYER3:
6139 card->discipline = try_then_request_module(
6140 symbol_get(qeth_l3_discipline), "qeth_l3");
6141 break;
6142 case QETH_DISCIPLINE_LAYER2:
6143 card->discipline = try_then_request_module(
6144 symbol_get(qeth_l2_discipline), "qeth_l2");
6145 break;
6146 default:
6147 break;
6148 }
6149 mutex_unlock(&qeth_mod_mutex);
6150
6151 if (!card->discipline) {
6152 dev_err(&card->gdev->dev, "There is no kernel module to "
6153 "support discipline %d\n", discipline);
6154 return -EINVAL;
6155 }
6156
6157 rc = card->discipline->setup(card->gdev);
6158 if (rc) {
6159 if (discipline == QETH_DISCIPLINE_LAYER2)
6160 symbol_put(qeth_l2_discipline);
6161 else
6162 symbol_put(qeth_l3_discipline);
6163 card->discipline = NULL;
6164
6165 return rc;
6166 }
6167
6168 card->options.layer = discipline;
6169 return 0;
6170 }
6171
qeth_remove_discipline(struct qeth_card * card)6172 void qeth_remove_discipline(struct qeth_card *card)
6173 {
6174 card->discipline->remove(card->gdev);
6175
6176 if (IS_LAYER2(card))
6177 symbol_put(qeth_l2_discipline);
6178 else
6179 symbol_put(qeth_l3_discipline);
6180 card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
6181 card->discipline = NULL;
6182 }
6183
6184 static const struct device_type qeth_generic_devtype = {
6185 .name = "qeth_generic",
6186 };
6187
6188 #define DBF_NAME_LEN 20
6189
6190 struct qeth_dbf_entry {
6191 char dbf_name[DBF_NAME_LEN];
6192 debug_info_t *dbf_info;
6193 struct list_head dbf_list;
6194 };
6195
6196 static LIST_HEAD(qeth_dbf_list);
6197 static DEFINE_MUTEX(qeth_dbf_list_mutex);
6198
qeth_get_dbf_entry(char * name)6199 static debug_info_t *qeth_get_dbf_entry(char *name)
6200 {
6201 struct qeth_dbf_entry *entry;
6202 debug_info_t *rc = NULL;
6203
6204 mutex_lock(&qeth_dbf_list_mutex);
6205 list_for_each_entry(entry, &qeth_dbf_list, dbf_list) {
6206 if (strcmp(entry->dbf_name, name) == 0) {
6207 rc = entry->dbf_info;
6208 break;
6209 }
6210 }
6211 mutex_unlock(&qeth_dbf_list_mutex);
6212 return rc;
6213 }
6214
qeth_add_dbf_entry(struct qeth_card * card,char * name)6215 static int qeth_add_dbf_entry(struct qeth_card *card, char *name)
6216 {
6217 struct qeth_dbf_entry *new_entry;
6218
6219 card->debug = debug_register(name, 2, 1, 8);
6220 if (!card->debug) {
6221 QETH_DBF_TEXT_(SETUP, 2, "%s", "qcdbf");
6222 goto err;
6223 }
6224 if (debug_register_view(card->debug, &debug_hex_ascii_view))
6225 goto err_dbg;
6226 new_entry = kzalloc(sizeof(struct qeth_dbf_entry), GFP_KERNEL);
6227 if (!new_entry)
6228 goto err_dbg;
6229 strncpy(new_entry->dbf_name, name, DBF_NAME_LEN);
6230 new_entry->dbf_info = card->debug;
6231 mutex_lock(&qeth_dbf_list_mutex);
6232 list_add(&new_entry->dbf_list, &qeth_dbf_list);
6233 mutex_unlock(&qeth_dbf_list_mutex);
6234
6235 return 0;
6236
6237 err_dbg:
6238 debug_unregister(card->debug);
6239 err:
6240 return -ENOMEM;
6241 }
6242
qeth_clear_dbf_list(void)6243 static void qeth_clear_dbf_list(void)
6244 {
6245 struct qeth_dbf_entry *entry, *tmp;
6246
6247 mutex_lock(&qeth_dbf_list_mutex);
6248 list_for_each_entry_safe(entry, tmp, &qeth_dbf_list, dbf_list) {
6249 list_del(&entry->dbf_list);
6250 debug_unregister(entry->dbf_info);
6251 kfree(entry);
6252 }
6253 mutex_unlock(&qeth_dbf_list_mutex);
6254 }
6255
qeth_alloc_netdev(struct qeth_card * card)6256 static struct net_device *qeth_alloc_netdev(struct qeth_card *card)
6257 {
6258 struct net_device *dev;
6259 struct qeth_priv *priv;
6260
6261 switch (card->info.type) {
6262 case QETH_CARD_TYPE_IQD:
6263 dev = alloc_netdev_mqs(sizeof(*priv), "hsi%d", NET_NAME_UNKNOWN,
6264 ether_setup, QETH_MAX_OUT_QUEUES, 1);
6265 break;
6266 case QETH_CARD_TYPE_OSM:
6267 dev = alloc_etherdev(sizeof(*priv));
6268 break;
6269 default:
6270 dev = alloc_etherdev_mqs(sizeof(*priv), QETH_MAX_OUT_QUEUES, 1);
6271 }
6272
6273 if (!dev)
6274 return NULL;
6275
6276 priv = netdev_priv(dev);
6277 priv->rx_copybreak = QETH_RX_COPYBREAK;
6278 priv->tx_wanted_queues = IS_IQD(card) ? QETH_IQD_MIN_TXQ : 1;
6279
6280 dev->ml_priv = card;
6281 dev->watchdog_timeo = QETH_TX_TIMEOUT;
6282 dev->min_mtu = 576;
6283 /* initialized when device first goes online: */
6284 dev->max_mtu = 0;
6285 dev->mtu = 0;
6286 SET_NETDEV_DEV(dev, &card->gdev->dev);
6287 netif_carrier_off(dev);
6288
6289 dev->ethtool_ops = &qeth_ethtool_ops;
6290 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
6291 dev->hw_features |= NETIF_F_SG;
6292 dev->vlan_features |= NETIF_F_SG;
6293 if (IS_IQD(card))
6294 dev->features |= NETIF_F_SG;
6295
6296 return dev;
6297 }
6298
qeth_clone_netdev(struct net_device * orig)6299 struct net_device *qeth_clone_netdev(struct net_device *orig)
6300 {
6301 struct net_device *clone = qeth_alloc_netdev(orig->ml_priv);
6302
6303 if (!clone)
6304 return NULL;
6305
6306 clone->dev_port = orig->dev_port;
6307 return clone;
6308 }
6309
qeth_core_probe_device(struct ccwgroup_device * gdev)6310 static int qeth_core_probe_device(struct ccwgroup_device *gdev)
6311 {
6312 struct qeth_card *card;
6313 struct device *dev;
6314 int rc;
6315 enum qeth_discipline_id enforced_disc;
6316 char dbf_name[DBF_NAME_LEN];
6317
6318 QETH_DBF_TEXT(SETUP, 2, "probedev");
6319
6320 dev = &gdev->dev;
6321 if (!get_device(dev))
6322 return -ENODEV;
6323
6324 QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev));
6325
6326 card = qeth_alloc_card(gdev);
6327 if (!card) {
6328 QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM);
6329 rc = -ENOMEM;
6330 goto err_dev;
6331 }
6332
6333 snprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
6334 dev_name(&gdev->dev));
6335 card->debug = qeth_get_dbf_entry(dbf_name);
6336 if (!card->debug) {
6337 rc = qeth_add_dbf_entry(card, dbf_name);
6338 if (rc)
6339 goto err_card;
6340 }
6341
6342 qeth_setup_card(card);
6343 card->dev = qeth_alloc_netdev(card);
6344 if (!card->dev) {
6345 rc = -ENOMEM;
6346 goto err_card;
6347 }
6348
6349 qeth_determine_capabilities(card);
6350 qeth_set_blkt_defaults(card);
6351
6352 card->qdio.in_q = qeth_alloc_qdio_queue();
6353 if (!card->qdio.in_q) {
6354 rc = -ENOMEM;
6355 goto err_rx_queue;
6356 }
6357
6358 card->qdio.no_out_queues = card->dev->num_tx_queues;
6359 rc = qeth_update_from_chp_desc(card);
6360 if (rc)
6361 goto err_chp_desc;
6362
6363 gdev->dev.groups = qeth_dev_groups;
6364
6365 enforced_disc = qeth_enforce_discipline(card);
6366 switch (enforced_disc) {
6367 case QETH_DISCIPLINE_UNDETERMINED:
6368 gdev->dev.type = &qeth_generic_devtype;
6369 break;
6370 default:
6371 card->info.layer_enforced = true;
6372 /* It's so early that we don't need the discipline_mutex yet. */
6373 rc = qeth_setup_discipline(card, enforced_disc);
6374 if (rc)
6375 goto err_setup_disc;
6376
6377 break;
6378 }
6379
6380 return 0;
6381
6382 err_setup_disc:
6383 err_chp_desc:
6384 qeth_free_qdio_queue(card->qdio.in_q);
6385 err_rx_queue:
6386 free_netdev(card->dev);
6387 err_card:
6388 qeth_core_free_card(card);
6389 err_dev:
6390 put_device(dev);
6391 return rc;
6392 }
6393
qeth_core_remove_device(struct ccwgroup_device * gdev)6394 static void qeth_core_remove_device(struct ccwgroup_device *gdev)
6395 {
6396 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6397
6398 QETH_CARD_TEXT(card, 2, "removedv");
6399
6400 mutex_lock(&card->discipline_mutex);
6401 if (card->discipline)
6402 qeth_remove_discipline(card);
6403 mutex_unlock(&card->discipline_mutex);
6404
6405 qeth_free_qdio_queues(card);
6406
6407 qeth_free_qdio_queue(card->qdio.in_q);
6408 free_netdev(card->dev);
6409 qeth_core_free_card(card);
6410 put_device(&gdev->dev);
6411 }
6412
qeth_core_set_online(struct ccwgroup_device * gdev)6413 static int qeth_core_set_online(struct ccwgroup_device *gdev)
6414 {
6415 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6416 int rc = 0;
6417 enum qeth_discipline_id def_discipline;
6418
6419 mutex_lock(&card->discipline_mutex);
6420 if (!card->discipline) {
6421 def_discipline = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
6422 QETH_DISCIPLINE_LAYER2;
6423 rc = qeth_setup_discipline(card, def_discipline);
6424 if (rc)
6425 goto err;
6426 }
6427
6428 rc = qeth_set_online(card, card->discipline);
6429
6430 err:
6431 mutex_unlock(&card->discipline_mutex);
6432 return rc;
6433 }
6434
qeth_core_set_offline(struct ccwgroup_device * gdev)6435 static int qeth_core_set_offline(struct ccwgroup_device *gdev)
6436 {
6437 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6438 int rc;
6439
6440 mutex_lock(&card->discipline_mutex);
6441 rc = qeth_set_offline(card, card->discipline, false);
6442 mutex_unlock(&card->discipline_mutex);
6443
6444 return rc;
6445 }
6446
qeth_core_shutdown(struct ccwgroup_device * gdev)6447 static void qeth_core_shutdown(struct ccwgroup_device *gdev)
6448 {
6449 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6450
6451 qeth_set_allowed_threads(card, 0, 1);
6452 if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
6453 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
6454 qeth_qdio_clear_card(card, 0);
6455 qeth_drain_output_queues(card);
6456 qdio_free(CARD_DDEV(card));
6457 }
6458
group_store(struct device_driver * ddrv,const char * buf,size_t count)6459 static ssize_t group_store(struct device_driver *ddrv, const char *buf,
6460 size_t count)
6461 {
6462 int err;
6463
6464 err = ccwgroup_create_dev(qeth_core_root_dev, to_ccwgroupdrv(ddrv), 3,
6465 buf);
6466
6467 return err ? err : count;
6468 }
6469 static DRIVER_ATTR_WO(group);
6470
6471 static struct attribute *qeth_drv_attrs[] = {
6472 &driver_attr_group.attr,
6473 NULL,
6474 };
6475 static struct attribute_group qeth_drv_attr_group = {
6476 .attrs = qeth_drv_attrs,
6477 };
6478 static const struct attribute_group *qeth_drv_attr_groups[] = {
6479 &qeth_drv_attr_group,
6480 NULL,
6481 };
6482
6483 static struct ccwgroup_driver qeth_core_ccwgroup_driver = {
6484 .driver = {
6485 .groups = qeth_drv_attr_groups,
6486 .owner = THIS_MODULE,
6487 .name = "qeth",
6488 },
6489 .ccw_driver = &qeth_ccw_driver,
6490 .setup = qeth_core_probe_device,
6491 .remove = qeth_core_remove_device,
6492 .set_online = qeth_core_set_online,
6493 .set_offline = qeth_core_set_offline,
6494 .shutdown = qeth_core_shutdown,
6495 };
6496
qeth_siocdevprivate(struct net_device * dev,struct ifreq * rq,void __user * data,int cmd)6497 int qeth_siocdevprivate(struct net_device *dev, struct ifreq *rq, void __user *data, int cmd)
6498 {
6499 struct qeth_card *card = dev->ml_priv;
6500 int rc = 0;
6501
6502 switch (cmd) {
6503 case SIOC_QETH_ADP_SET_SNMP_CONTROL:
6504 rc = qeth_snmp_command(card, data);
6505 break;
6506 case SIOC_QETH_GET_CARD_TYPE:
6507 if ((IS_OSD(card) || IS_OSM(card) || IS_OSX(card)) &&
6508 !IS_VM_NIC(card))
6509 return 1;
6510 return 0;
6511 case SIOC_QETH_QUERY_OAT:
6512 rc = qeth_query_oat_command(card, data);
6513 break;
6514 default:
6515 rc = -EOPNOTSUPP;
6516 }
6517 if (rc)
6518 QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
6519 return rc;
6520 }
6521 EXPORT_SYMBOL_GPL(qeth_siocdevprivate);
6522
qeth_do_ioctl(struct net_device * dev,struct ifreq * rq,int cmd)6523 int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
6524 {
6525 struct qeth_card *card = dev->ml_priv;
6526 struct mii_ioctl_data *mii_data;
6527 int rc = 0;
6528
6529 switch (cmd) {
6530 case SIOCGMIIPHY:
6531 mii_data = if_mii(rq);
6532 mii_data->phy_id = 0;
6533 break;
6534 case SIOCGMIIREG:
6535 mii_data = if_mii(rq);
6536 if (mii_data->phy_id != 0)
6537 rc = -EINVAL;
6538 else
6539 mii_data->val_out = qeth_mdio_read(dev,
6540 mii_data->phy_id, mii_data->reg_num);
6541 break;
6542 default:
6543 return -EOPNOTSUPP;
6544 }
6545 if (rc)
6546 QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
6547 return rc;
6548 }
6549 EXPORT_SYMBOL_GPL(qeth_do_ioctl);
6550
qeth_start_csum_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)6551 static int qeth_start_csum_cb(struct qeth_card *card, struct qeth_reply *reply,
6552 unsigned long data)
6553 {
6554 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6555 u32 *features = reply->param;
6556
6557 if (qeth_setassparms_inspect_rc(cmd))
6558 return -EIO;
6559
6560 *features = cmd->data.setassparms.data.flags_32bit;
6561 return 0;
6562 }
6563
qeth_set_csum_off(struct qeth_card * card,enum qeth_ipa_funcs cstype,enum qeth_prot_versions prot)6564 static int qeth_set_csum_off(struct qeth_card *card, enum qeth_ipa_funcs cstype,
6565 enum qeth_prot_versions prot)
6566 {
6567 return qeth_send_simple_setassparms_prot(card, cstype, IPA_CMD_ASS_STOP,
6568 NULL, prot);
6569 }
6570
qeth_set_csum_on(struct qeth_card * card,enum qeth_ipa_funcs cstype,enum qeth_prot_versions prot,u8 * lp2lp)6571 static int qeth_set_csum_on(struct qeth_card *card, enum qeth_ipa_funcs cstype,
6572 enum qeth_prot_versions prot, u8 *lp2lp)
6573 {
6574 u32 required_features = QETH_IPA_CHECKSUM_UDP | QETH_IPA_CHECKSUM_TCP;
6575 struct qeth_cmd_buffer *iob;
6576 struct qeth_ipa_caps caps;
6577 u32 features;
6578 int rc;
6579
6580 /* some L3 HW requires combined L3+L4 csum offload: */
6581 if (IS_LAYER3(card) && prot == QETH_PROT_IPV4 &&
6582 cstype == IPA_OUTBOUND_CHECKSUM)
6583 required_features |= QETH_IPA_CHECKSUM_IP_HDR;
6584
6585 iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_START, 0,
6586 prot);
6587 if (!iob)
6588 return -ENOMEM;
6589
6590 rc = qeth_send_ipa_cmd(card, iob, qeth_start_csum_cb, &features);
6591 if (rc)
6592 return rc;
6593
6594 if ((required_features & features) != required_features) {
6595 qeth_set_csum_off(card, cstype, prot);
6596 return -EOPNOTSUPP;
6597 }
6598
6599 iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_ENABLE,
6600 SETASS_DATA_SIZEOF(flags_32bit),
6601 prot);
6602 if (!iob) {
6603 qeth_set_csum_off(card, cstype, prot);
6604 return -ENOMEM;
6605 }
6606
6607 if (features & QETH_IPA_CHECKSUM_LP2LP)
6608 required_features |= QETH_IPA_CHECKSUM_LP2LP;
6609 __ipa_cmd(iob)->data.setassparms.data.flags_32bit = required_features;
6610 rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6611 if (rc) {
6612 qeth_set_csum_off(card, cstype, prot);
6613 return rc;
6614 }
6615
6616 if (!qeth_ipa_caps_supported(&caps, required_features) ||
6617 !qeth_ipa_caps_enabled(&caps, required_features)) {
6618 qeth_set_csum_off(card, cstype, prot);
6619 return -EOPNOTSUPP;
6620 }
6621
6622 dev_info(&card->gdev->dev, "HW Checksumming (%sbound IPv%d) enabled\n",
6623 cstype == IPA_INBOUND_CHECKSUM ? "in" : "out", prot);
6624
6625 if (lp2lp)
6626 *lp2lp = qeth_ipa_caps_enabled(&caps, QETH_IPA_CHECKSUM_LP2LP);
6627
6628 return 0;
6629 }
6630
qeth_set_ipa_csum(struct qeth_card * card,bool on,int cstype,enum qeth_prot_versions prot,u8 * lp2lp)6631 static int qeth_set_ipa_csum(struct qeth_card *card, bool on, int cstype,
6632 enum qeth_prot_versions prot, u8 *lp2lp)
6633 {
6634 return on ? qeth_set_csum_on(card, cstype, prot, lp2lp) :
6635 qeth_set_csum_off(card, cstype, prot);
6636 }
6637
qeth_start_tso_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)6638 static int qeth_start_tso_cb(struct qeth_card *card, struct qeth_reply *reply,
6639 unsigned long data)
6640 {
6641 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6642 struct qeth_tso_start_data *tso_data = reply->param;
6643
6644 if (qeth_setassparms_inspect_rc(cmd))
6645 return -EIO;
6646
6647 tso_data->mss = cmd->data.setassparms.data.tso.mss;
6648 tso_data->supported = cmd->data.setassparms.data.tso.supported;
6649 return 0;
6650 }
6651
qeth_set_tso_off(struct qeth_card * card,enum qeth_prot_versions prot)6652 static int qeth_set_tso_off(struct qeth_card *card,
6653 enum qeth_prot_versions prot)
6654 {
6655 return qeth_send_simple_setassparms_prot(card, IPA_OUTBOUND_TSO,
6656 IPA_CMD_ASS_STOP, NULL, prot);
6657 }
6658
qeth_set_tso_on(struct qeth_card * card,enum qeth_prot_versions prot)6659 static int qeth_set_tso_on(struct qeth_card *card,
6660 enum qeth_prot_versions prot)
6661 {
6662 struct qeth_tso_start_data tso_data;
6663 struct qeth_cmd_buffer *iob;
6664 struct qeth_ipa_caps caps;
6665 int rc;
6666
6667 iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6668 IPA_CMD_ASS_START, 0, prot);
6669 if (!iob)
6670 return -ENOMEM;
6671
6672 rc = qeth_send_ipa_cmd(card, iob, qeth_start_tso_cb, &tso_data);
6673 if (rc)
6674 return rc;
6675
6676 if (!tso_data.mss || !(tso_data.supported & QETH_IPA_LARGE_SEND_TCP)) {
6677 qeth_set_tso_off(card, prot);
6678 return -EOPNOTSUPP;
6679 }
6680
6681 iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6682 IPA_CMD_ASS_ENABLE,
6683 SETASS_DATA_SIZEOF(caps), prot);
6684 if (!iob) {
6685 qeth_set_tso_off(card, prot);
6686 return -ENOMEM;
6687 }
6688
6689 /* enable TSO capability */
6690 __ipa_cmd(iob)->data.setassparms.data.caps.enabled =
6691 QETH_IPA_LARGE_SEND_TCP;
6692 rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6693 if (rc) {
6694 qeth_set_tso_off(card, prot);
6695 return rc;
6696 }
6697
6698 if (!qeth_ipa_caps_supported(&caps, QETH_IPA_LARGE_SEND_TCP) ||
6699 !qeth_ipa_caps_enabled(&caps, QETH_IPA_LARGE_SEND_TCP)) {
6700 qeth_set_tso_off(card, prot);
6701 return -EOPNOTSUPP;
6702 }
6703
6704 dev_info(&card->gdev->dev, "TSOv%u enabled (MSS: %u)\n", prot,
6705 tso_data.mss);
6706 return 0;
6707 }
6708
qeth_set_ipa_tso(struct qeth_card * card,bool on,enum qeth_prot_versions prot)6709 static int qeth_set_ipa_tso(struct qeth_card *card, bool on,
6710 enum qeth_prot_versions prot)
6711 {
6712 return on ? qeth_set_tso_on(card, prot) : qeth_set_tso_off(card, prot);
6713 }
6714
qeth_set_ipa_rx_csum(struct qeth_card * card,bool on)6715 static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on)
6716 {
6717 int rc_ipv4 = (on) ? -EOPNOTSUPP : 0;
6718 int rc_ipv6;
6719
6720 if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
6721 rc_ipv4 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6722 QETH_PROT_IPV4, NULL);
6723 if (!qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6724 /* no/one Offload Assist available, so the rc is trivial */
6725 return rc_ipv4;
6726
6727 rc_ipv6 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6728 QETH_PROT_IPV6, NULL);
6729
6730 if (on)
6731 /* enable: success if any Assist is active */
6732 return (rc_ipv6) ? rc_ipv4 : 0;
6733
6734 /* disable: failure if any Assist is still active */
6735 return (rc_ipv6) ? rc_ipv6 : rc_ipv4;
6736 }
6737
6738 /**
6739 * qeth_enable_hw_features() - (Re-)Enable HW functions for device features
6740 * @dev: a net_device
6741 */
qeth_enable_hw_features(struct net_device * dev)6742 void qeth_enable_hw_features(struct net_device *dev)
6743 {
6744 struct qeth_card *card = dev->ml_priv;
6745 netdev_features_t features;
6746
6747 features = dev->features;
6748 /* force-off any feature that might need an IPA sequence.
6749 * netdev_update_features() will restart them.
6750 */
6751 dev->features &= ~dev->hw_features;
6752 /* toggle VLAN filter, so that VIDs are re-programmed: */
6753 if (IS_LAYER2(card) && IS_VM_NIC(card)) {
6754 dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
6755 dev->wanted_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
6756 }
6757 netdev_update_features(dev);
6758 if (features != dev->features)
6759 dev_warn(&card->gdev->dev,
6760 "Device recovery failed to restore all offload features\n");
6761 }
6762 EXPORT_SYMBOL_GPL(qeth_enable_hw_features);
6763
qeth_check_restricted_features(struct qeth_card * card,netdev_features_t changed,netdev_features_t actual)6764 static void qeth_check_restricted_features(struct qeth_card *card,
6765 netdev_features_t changed,
6766 netdev_features_t actual)
6767 {
6768 netdev_features_t ipv6_features = NETIF_F_TSO6;
6769 netdev_features_t ipv4_features = NETIF_F_TSO;
6770
6771 if (!card->info.has_lp2lp_cso_v6)
6772 ipv6_features |= NETIF_F_IPV6_CSUM;
6773 if (!card->info.has_lp2lp_cso_v4)
6774 ipv4_features |= NETIF_F_IP_CSUM;
6775
6776 if ((changed & ipv6_features) && !(actual & ipv6_features))
6777 qeth_flush_local_addrs6(card);
6778 if ((changed & ipv4_features) && !(actual & ipv4_features))
6779 qeth_flush_local_addrs4(card);
6780 }
6781
qeth_set_features(struct net_device * dev,netdev_features_t features)6782 int qeth_set_features(struct net_device *dev, netdev_features_t features)
6783 {
6784 struct qeth_card *card = dev->ml_priv;
6785 netdev_features_t changed = dev->features ^ features;
6786 int rc = 0;
6787
6788 QETH_CARD_TEXT(card, 2, "setfeat");
6789 QETH_CARD_HEX(card, 2, &features, sizeof(features));
6790
6791 if ((changed & NETIF_F_IP_CSUM)) {
6792 rc = qeth_set_ipa_csum(card, features & NETIF_F_IP_CSUM,
6793 IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV4,
6794 &card->info.has_lp2lp_cso_v4);
6795 if (rc)
6796 changed ^= NETIF_F_IP_CSUM;
6797 }
6798 if (changed & NETIF_F_IPV6_CSUM) {
6799 rc = qeth_set_ipa_csum(card, features & NETIF_F_IPV6_CSUM,
6800 IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV6,
6801 &card->info.has_lp2lp_cso_v6);
6802 if (rc)
6803 changed ^= NETIF_F_IPV6_CSUM;
6804 }
6805 if (changed & NETIF_F_RXCSUM) {
6806 rc = qeth_set_ipa_rx_csum(card, features & NETIF_F_RXCSUM);
6807 if (rc)
6808 changed ^= NETIF_F_RXCSUM;
6809 }
6810 if (changed & NETIF_F_TSO) {
6811 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO,
6812 QETH_PROT_IPV4);
6813 if (rc)
6814 changed ^= NETIF_F_TSO;
6815 }
6816 if (changed & NETIF_F_TSO6) {
6817 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO6,
6818 QETH_PROT_IPV6);
6819 if (rc)
6820 changed ^= NETIF_F_TSO6;
6821 }
6822
6823 qeth_check_restricted_features(card, dev->features ^ features,
6824 dev->features ^ changed);
6825
6826 /* everything changed successfully? */
6827 if ((dev->features ^ features) == changed)
6828 return 0;
6829 /* something went wrong. save changed features and return error */
6830 dev->features ^= changed;
6831 return -EIO;
6832 }
6833 EXPORT_SYMBOL_GPL(qeth_set_features);
6834
qeth_fix_features(struct net_device * dev,netdev_features_t features)6835 netdev_features_t qeth_fix_features(struct net_device *dev,
6836 netdev_features_t features)
6837 {
6838 struct qeth_card *card = dev->ml_priv;
6839
6840 QETH_CARD_TEXT(card, 2, "fixfeat");
6841 if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
6842 features &= ~NETIF_F_IP_CSUM;
6843 if (!qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6))
6844 features &= ~NETIF_F_IPV6_CSUM;
6845 if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM) &&
6846 !qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6847 features &= ~NETIF_F_RXCSUM;
6848 if (!qeth_is_supported(card, IPA_OUTBOUND_TSO))
6849 features &= ~NETIF_F_TSO;
6850 if (!qeth_is_supported6(card, IPA_OUTBOUND_TSO))
6851 features &= ~NETIF_F_TSO6;
6852
6853 QETH_CARD_HEX(card, 2, &features, sizeof(features));
6854 return features;
6855 }
6856 EXPORT_SYMBOL_GPL(qeth_fix_features);
6857
qeth_features_check(struct sk_buff * skb,struct net_device * dev,netdev_features_t features)6858 netdev_features_t qeth_features_check(struct sk_buff *skb,
6859 struct net_device *dev,
6860 netdev_features_t features)
6861 {
6862 struct qeth_card *card = dev->ml_priv;
6863
6864 /* Traffic with local next-hop is not eligible for some offloads: */
6865 if (skb->ip_summed == CHECKSUM_PARTIAL &&
6866 READ_ONCE(card->options.isolation) != ISOLATION_MODE_FWD) {
6867 netdev_features_t restricted = 0;
6868
6869 if (skb_is_gso(skb) && !netif_needs_gso(skb, features))
6870 restricted |= NETIF_F_ALL_TSO;
6871
6872 switch (vlan_get_protocol(skb)) {
6873 case htons(ETH_P_IP):
6874 if (!card->info.has_lp2lp_cso_v4)
6875 restricted |= NETIF_F_IP_CSUM;
6876
6877 if (restricted && qeth_next_hop_is_local_v4(card, skb))
6878 features &= ~restricted;
6879 break;
6880 case htons(ETH_P_IPV6):
6881 if (!card->info.has_lp2lp_cso_v6)
6882 restricted |= NETIF_F_IPV6_CSUM;
6883
6884 if (restricted && qeth_next_hop_is_local_v6(card, skb))
6885 features &= ~restricted;
6886 break;
6887 default:
6888 break;
6889 }
6890 }
6891
6892 /* GSO segmentation builds skbs with
6893 * a (small) linear part for the headers, and
6894 * page frags for the data.
6895 * Compared to a linear skb, the header-only part consumes an
6896 * additional buffer element. This reduces buffer utilization, and
6897 * hurts throughput. So compress small segments into one element.
6898 */
6899 if (netif_needs_gso(skb, features)) {
6900 /* match skb_segment(): */
6901 unsigned int doffset = skb->data - skb_mac_header(skb);
6902 unsigned int hsize = skb_shinfo(skb)->gso_size;
6903 unsigned int hroom = skb_headroom(skb);
6904
6905 /* linearize only if resulting skb allocations are order-0: */
6906 if (SKB_DATA_ALIGN(hroom + doffset + hsize) <= SKB_MAX_HEAD(0))
6907 features &= ~NETIF_F_SG;
6908 }
6909
6910 return vlan_features_check(skb, features);
6911 }
6912 EXPORT_SYMBOL_GPL(qeth_features_check);
6913
qeth_get_stats64(struct net_device * dev,struct rtnl_link_stats64 * stats)6914 void qeth_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
6915 {
6916 struct qeth_card *card = dev->ml_priv;
6917 struct qeth_qdio_out_q *queue;
6918 unsigned int i;
6919
6920 QETH_CARD_TEXT(card, 5, "getstat");
6921
6922 stats->rx_packets = card->stats.rx_packets;
6923 stats->rx_bytes = card->stats.rx_bytes;
6924 stats->rx_errors = card->stats.rx_length_errors +
6925 card->stats.rx_frame_errors +
6926 card->stats.rx_fifo_errors;
6927 stats->rx_dropped = card->stats.rx_dropped_nomem +
6928 card->stats.rx_dropped_notsupp +
6929 card->stats.rx_dropped_runt;
6930 stats->multicast = card->stats.rx_multicast;
6931 stats->rx_length_errors = card->stats.rx_length_errors;
6932 stats->rx_frame_errors = card->stats.rx_frame_errors;
6933 stats->rx_fifo_errors = card->stats.rx_fifo_errors;
6934
6935 for (i = 0; i < card->qdio.no_out_queues; i++) {
6936 queue = card->qdio.out_qs[i];
6937
6938 stats->tx_packets += queue->stats.tx_packets;
6939 stats->tx_bytes += queue->stats.tx_bytes;
6940 stats->tx_errors += queue->stats.tx_errors;
6941 stats->tx_dropped += queue->stats.tx_dropped;
6942 }
6943 }
6944 EXPORT_SYMBOL_GPL(qeth_get_stats64);
6945
6946 #define TC_IQD_UCAST 0
qeth_iqd_set_prio_tc_map(struct net_device * dev,unsigned int ucast_txqs)6947 static void qeth_iqd_set_prio_tc_map(struct net_device *dev,
6948 unsigned int ucast_txqs)
6949 {
6950 unsigned int prio;
6951
6952 /* IQD requires mcast traffic to be placed on a dedicated queue, and
6953 * qeth_iqd_select_queue() deals with this.
6954 * For unicast traffic, we defer the queue selection to the stack.
6955 * By installing a trivial prio map that spans over only the unicast
6956 * queues, we can encourage the stack to spread the ucast traffic evenly
6957 * without selecting the mcast queue.
6958 */
6959
6960 /* One traffic class, spanning over all active ucast queues: */
6961 netdev_set_num_tc(dev, 1);
6962 netdev_set_tc_queue(dev, TC_IQD_UCAST, ucast_txqs,
6963 QETH_IQD_MIN_UCAST_TXQ);
6964
6965 /* Map all priorities to this traffic class: */
6966 for (prio = 0; prio <= TC_BITMASK; prio++)
6967 netdev_set_prio_tc_map(dev, prio, TC_IQD_UCAST);
6968 }
6969
qeth_set_real_num_tx_queues(struct qeth_card * card,unsigned int count)6970 int qeth_set_real_num_tx_queues(struct qeth_card *card, unsigned int count)
6971 {
6972 struct net_device *dev = card->dev;
6973 int rc;
6974
6975 /* Per netif_setup_tc(), adjust the mapping first: */
6976 if (IS_IQD(card))
6977 qeth_iqd_set_prio_tc_map(dev, count - 1);
6978
6979 rc = netif_set_real_num_tx_queues(dev, count);
6980
6981 if (rc && IS_IQD(card))
6982 qeth_iqd_set_prio_tc_map(dev, dev->real_num_tx_queues - 1);
6983
6984 return rc;
6985 }
6986 EXPORT_SYMBOL_GPL(qeth_set_real_num_tx_queues);
6987
qeth_iqd_select_queue(struct net_device * dev,struct sk_buff * skb,u8 cast_type,struct net_device * sb_dev)6988 u16 qeth_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
6989 u8 cast_type, struct net_device *sb_dev)
6990 {
6991 u16 txq;
6992
6993 if (cast_type != RTN_UNICAST)
6994 return QETH_IQD_MCAST_TXQ;
6995 if (dev->real_num_tx_queues == QETH_IQD_MIN_TXQ)
6996 return QETH_IQD_MIN_UCAST_TXQ;
6997
6998 txq = netdev_pick_tx(dev, skb, sb_dev);
6999 return (txq == QETH_IQD_MCAST_TXQ) ? QETH_IQD_MIN_UCAST_TXQ : txq;
7000 }
7001 EXPORT_SYMBOL_GPL(qeth_iqd_select_queue);
7002
qeth_osa_select_queue(struct net_device * dev,struct sk_buff * skb,struct net_device * sb_dev)7003 u16 qeth_osa_select_queue(struct net_device *dev, struct sk_buff *skb,
7004 struct net_device *sb_dev)
7005 {
7006 struct qeth_card *card = dev->ml_priv;
7007
7008 if (qeth_uses_tx_prio_queueing(card))
7009 return qeth_get_priority_queue(card, skb);
7010
7011 return netdev_pick_tx(dev, skb, sb_dev);
7012 }
7013 EXPORT_SYMBOL_GPL(qeth_osa_select_queue);
7014
qeth_open(struct net_device * dev)7015 int qeth_open(struct net_device *dev)
7016 {
7017 struct qeth_card *card = dev->ml_priv;
7018 struct qeth_qdio_out_q *queue;
7019 unsigned int i;
7020
7021 QETH_CARD_TEXT(card, 4, "qethopen");
7022
7023 card->data.state = CH_STATE_UP;
7024 netif_tx_start_all_queues(dev);
7025
7026 local_bh_disable();
7027 qeth_for_each_output_queue(card, queue, i) {
7028 netif_napi_add_tx(dev, &queue->napi, qeth_tx_poll);
7029 napi_enable(&queue->napi);
7030 napi_schedule(&queue->napi);
7031 }
7032
7033 napi_enable(&card->napi);
7034 napi_schedule(&card->napi);
7035 /* kick-start the NAPI softirq: */
7036 local_bh_enable();
7037
7038 return 0;
7039 }
7040 EXPORT_SYMBOL_GPL(qeth_open);
7041
qeth_stop(struct net_device * dev)7042 int qeth_stop(struct net_device *dev)
7043 {
7044 struct qeth_card *card = dev->ml_priv;
7045 struct qeth_qdio_out_q *queue;
7046 unsigned int i;
7047
7048 QETH_CARD_TEXT(card, 4, "qethstop");
7049
7050 napi_disable(&card->napi);
7051 cancel_delayed_work_sync(&card->buffer_reclaim_work);
7052 qdio_stop_irq(CARD_DDEV(card));
7053
7054 /* Quiesce the NAPI instances: */
7055 qeth_for_each_output_queue(card, queue, i)
7056 napi_disable(&queue->napi);
7057
7058 /* Stop .ndo_start_xmit, might still access queue->napi. */
7059 netif_tx_disable(dev);
7060
7061 qeth_for_each_output_queue(card, queue, i) {
7062 del_timer_sync(&queue->timer);
7063 /* Queues may get re-allocated, so remove the NAPIs. */
7064 netif_napi_del(&queue->napi);
7065 }
7066
7067 return 0;
7068 }
7069 EXPORT_SYMBOL_GPL(qeth_stop);
7070
qeth_core_init(void)7071 static int __init qeth_core_init(void)
7072 {
7073 int rc;
7074
7075 pr_info("loading core functions\n");
7076
7077 qeth_debugfs_root = debugfs_create_dir("qeth", NULL);
7078
7079 rc = qeth_register_dbf_views();
7080 if (rc)
7081 goto dbf_err;
7082 qeth_core_root_dev = root_device_register("qeth");
7083 rc = PTR_ERR_OR_ZERO(qeth_core_root_dev);
7084 if (rc)
7085 goto register_err;
7086 qeth_core_header_cache =
7087 kmem_cache_create("qeth_hdr", QETH_HDR_CACHE_OBJ_SIZE,
7088 roundup_pow_of_two(QETH_HDR_CACHE_OBJ_SIZE),
7089 0, NULL);
7090 if (!qeth_core_header_cache) {
7091 rc = -ENOMEM;
7092 goto slab_err;
7093 }
7094 qeth_qdio_outbuf_cache = kmem_cache_create("qeth_buf",
7095 sizeof(struct qeth_qdio_out_buffer), 0, 0, NULL);
7096 if (!qeth_qdio_outbuf_cache) {
7097 rc = -ENOMEM;
7098 goto cqslab_err;
7099 }
7100
7101 qeth_qaob_cache = kmem_cache_create("qeth_qaob",
7102 sizeof(struct qaob),
7103 sizeof(struct qaob),
7104 0, NULL);
7105 if (!qeth_qaob_cache) {
7106 rc = -ENOMEM;
7107 goto qaob_err;
7108 }
7109
7110 rc = ccw_driver_register(&qeth_ccw_driver);
7111 if (rc)
7112 goto ccw_err;
7113 rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver);
7114 if (rc)
7115 goto ccwgroup_err;
7116
7117 return 0;
7118
7119 ccwgroup_err:
7120 ccw_driver_unregister(&qeth_ccw_driver);
7121 ccw_err:
7122 kmem_cache_destroy(qeth_qaob_cache);
7123 qaob_err:
7124 kmem_cache_destroy(qeth_qdio_outbuf_cache);
7125 cqslab_err:
7126 kmem_cache_destroy(qeth_core_header_cache);
7127 slab_err:
7128 root_device_unregister(qeth_core_root_dev);
7129 register_err:
7130 qeth_unregister_dbf_views();
7131 dbf_err:
7132 debugfs_remove_recursive(qeth_debugfs_root);
7133 pr_err("Initializing the qeth device driver failed\n");
7134 return rc;
7135 }
7136
qeth_core_exit(void)7137 static void __exit qeth_core_exit(void)
7138 {
7139 qeth_clear_dbf_list();
7140 ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver);
7141 ccw_driver_unregister(&qeth_ccw_driver);
7142 kmem_cache_destroy(qeth_qaob_cache);
7143 kmem_cache_destroy(qeth_qdio_outbuf_cache);
7144 kmem_cache_destroy(qeth_core_header_cache);
7145 root_device_unregister(qeth_core_root_dev);
7146 qeth_unregister_dbf_views();
7147 debugfs_remove_recursive(qeth_debugfs_root);
7148 pr_info("core functions removed\n");
7149 }
7150
7151 module_init(qeth_core_init);
7152 module_exit(qeth_core_exit);
7153 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
7154 MODULE_DESCRIPTION("qeth core functions");
7155 MODULE_LICENSE("GPL");
7156