1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright IBM Corp. 2007, 2009
4 * Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
5 * Frank Pavlic <fpavlic@de.ibm.com>,
6 * Thomas Spatzier <tspat@de.ibm.com>,
7 * Frank Blaschka <frank.blaschka@de.ibm.com>
8 */
9
10 #define KMSG_COMPONENT "qeth"
11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
12
13 #include <linux/compat.h>
14 #include <linux/module.h>
15 #include <linux/moduleparam.h>
16 #include <linux/string.h>
17 #include <linux/errno.h>
18 #include <linux/kernel.h>
19 #include <linux/log2.h>
20 #include <linux/ip.h>
21 #include <linux/tcp.h>
22 #include <linux/mii.h>
23 #include <linux/mm.h>
24 #include <linux/kthread.h>
25 #include <linux/slab.h>
26 #include <linux/if_vlan.h>
27 #include <linux/netdevice.h>
28 #include <linux/netdev_features.h>
29 #include <linux/skbuff.h>
30 #include <linux/vmalloc.h>
31
32 #include <net/iucv/af_iucv.h>
33 #include <net/dsfield.h>
34
35 #include <asm/ebcdic.h>
36 #include <asm/chpid.h>
37 #include <asm/io.h>
38 #include <asm/sysinfo.h>
39 #include <asm/diag.h>
40 #include <asm/cio.h>
41 #include <asm/ccwdev.h>
42 #include <asm/cpcmd.h>
43
44 #include "qeth_core.h"
45
46 struct qeth_dbf_info qeth_dbf[QETH_DBF_INFOS] = {
47 /* define dbf - Name, Pages, Areas, Maxlen, Level, View, Handle */
48 /* N P A M L V H */
49 [QETH_DBF_SETUP] = {"qeth_setup",
50 8, 1, 8, 5, &debug_hex_ascii_view, NULL},
51 [QETH_DBF_MSG] = {"qeth_msg", 8, 1, 11 * sizeof(long), 3,
52 &debug_sprintf_view, NULL},
53 [QETH_DBF_CTRL] = {"qeth_control",
54 8, 1, QETH_DBF_CTRL_LEN, 5, &debug_hex_ascii_view, NULL},
55 };
56 EXPORT_SYMBOL_GPL(qeth_dbf);
57
58 struct kmem_cache *qeth_core_header_cache;
59 EXPORT_SYMBOL_GPL(qeth_core_header_cache);
60 static struct kmem_cache *qeth_qdio_outbuf_cache;
61
62 static struct device *qeth_core_root_dev;
63 static struct lock_class_key qdio_out_skb_queue_key;
64
65 static void qeth_issue_next_read_cb(struct qeth_card *card,
66 struct qeth_cmd_buffer *iob,
67 unsigned int data_length);
68 static void qeth_free_buffer_pool(struct qeth_card *);
69 static int qeth_qdio_establish(struct qeth_card *);
70 static void qeth_free_qdio_queues(struct qeth_card *card);
71 static void qeth_notify_skbs(struct qeth_qdio_out_q *queue,
72 struct qeth_qdio_out_buffer *buf,
73 enum iucv_tx_notify notification);
74 static void qeth_tx_complete_buf(struct qeth_qdio_out_buffer *buf, bool error,
75 int budget);
76 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *, int);
77
qeth_close_dev_handler(struct work_struct * work)78 static void qeth_close_dev_handler(struct work_struct *work)
79 {
80 struct qeth_card *card;
81
82 card = container_of(work, struct qeth_card, close_dev_work);
83 QETH_CARD_TEXT(card, 2, "cldevhdl");
84 ccwgroup_set_offline(card->gdev);
85 }
86
qeth_get_cardname(struct qeth_card * card)87 static const char *qeth_get_cardname(struct qeth_card *card)
88 {
89 if (IS_VM_NIC(card)) {
90 switch (card->info.type) {
91 case QETH_CARD_TYPE_OSD:
92 return " Virtual NIC QDIO";
93 case QETH_CARD_TYPE_IQD:
94 return " Virtual NIC Hiper";
95 case QETH_CARD_TYPE_OSM:
96 return " Virtual NIC QDIO - OSM";
97 case QETH_CARD_TYPE_OSX:
98 return " Virtual NIC QDIO - OSX";
99 default:
100 return " unknown";
101 }
102 } else {
103 switch (card->info.type) {
104 case QETH_CARD_TYPE_OSD:
105 return " OSD Express";
106 case QETH_CARD_TYPE_IQD:
107 return " HiperSockets";
108 case QETH_CARD_TYPE_OSN:
109 return " OSN QDIO";
110 case QETH_CARD_TYPE_OSM:
111 return " OSM QDIO";
112 case QETH_CARD_TYPE_OSX:
113 return " OSX QDIO";
114 default:
115 return " unknown";
116 }
117 }
118 return " n/a";
119 }
120
121 /* max length to be returned: 14 */
qeth_get_cardname_short(struct qeth_card * card)122 const char *qeth_get_cardname_short(struct qeth_card *card)
123 {
124 if (IS_VM_NIC(card)) {
125 switch (card->info.type) {
126 case QETH_CARD_TYPE_OSD:
127 return "Virt.NIC QDIO";
128 case QETH_CARD_TYPE_IQD:
129 return "Virt.NIC Hiper";
130 case QETH_CARD_TYPE_OSM:
131 return "Virt.NIC OSM";
132 case QETH_CARD_TYPE_OSX:
133 return "Virt.NIC OSX";
134 default:
135 return "unknown";
136 }
137 } else {
138 switch (card->info.type) {
139 case QETH_CARD_TYPE_OSD:
140 switch (card->info.link_type) {
141 case QETH_LINK_TYPE_FAST_ETH:
142 return "OSD_100";
143 case QETH_LINK_TYPE_HSTR:
144 return "HSTR";
145 case QETH_LINK_TYPE_GBIT_ETH:
146 return "OSD_1000";
147 case QETH_LINK_TYPE_10GBIT_ETH:
148 return "OSD_10GIG";
149 case QETH_LINK_TYPE_25GBIT_ETH:
150 return "OSD_25GIG";
151 case QETH_LINK_TYPE_LANE_ETH100:
152 return "OSD_FE_LANE";
153 case QETH_LINK_TYPE_LANE_TR:
154 return "OSD_TR_LANE";
155 case QETH_LINK_TYPE_LANE_ETH1000:
156 return "OSD_GbE_LANE";
157 case QETH_LINK_TYPE_LANE:
158 return "OSD_ATM_LANE";
159 default:
160 return "OSD_Express";
161 }
162 case QETH_CARD_TYPE_IQD:
163 return "HiperSockets";
164 case QETH_CARD_TYPE_OSN:
165 return "OSN";
166 case QETH_CARD_TYPE_OSM:
167 return "OSM_1000";
168 case QETH_CARD_TYPE_OSX:
169 return "OSX_10GIG";
170 default:
171 return "unknown";
172 }
173 }
174 return "n/a";
175 }
176
qeth_set_allowed_threads(struct qeth_card * card,unsigned long threads,int clear_start_mask)177 void qeth_set_allowed_threads(struct qeth_card *card, unsigned long threads,
178 int clear_start_mask)
179 {
180 unsigned long flags;
181
182 spin_lock_irqsave(&card->thread_mask_lock, flags);
183 card->thread_allowed_mask = threads;
184 if (clear_start_mask)
185 card->thread_start_mask &= threads;
186 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
187 wake_up(&card->wait_q);
188 }
189 EXPORT_SYMBOL_GPL(qeth_set_allowed_threads);
190
qeth_threads_running(struct qeth_card * card,unsigned long threads)191 int qeth_threads_running(struct qeth_card *card, unsigned long threads)
192 {
193 unsigned long flags;
194 int rc = 0;
195
196 spin_lock_irqsave(&card->thread_mask_lock, flags);
197 rc = (card->thread_running_mask & threads);
198 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
199 return rc;
200 }
201 EXPORT_SYMBOL_GPL(qeth_threads_running);
202
qeth_clear_working_pool_list(struct qeth_card * card)203 void qeth_clear_working_pool_list(struct qeth_card *card)
204 {
205 struct qeth_buffer_pool_entry *pool_entry, *tmp;
206
207 QETH_CARD_TEXT(card, 5, "clwrklst");
208 list_for_each_entry_safe(pool_entry, tmp,
209 &card->qdio.in_buf_pool.entry_list, list){
210 list_del(&pool_entry->list);
211 }
212 }
213 EXPORT_SYMBOL_GPL(qeth_clear_working_pool_list);
214
qeth_alloc_buffer_pool(struct qeth_card * card)215 static int qeth_alloc_buffer_pool(struct qeth_card *card)
216 {
217 struct qeth_buffer_pool_entry *pool_entry;
218 void *ptr;
219 int i, j;
220
221 QETH_CARD_TEXT(card, 5, "alocpool");
222 for (i = 0; i < card->qdio.init_pool.buf_count; ++i) {
223 pool_entry = kzalloc(sizeof(*pool_entry), GFP_KERNEL);
224 if (!pool_entry) {
225 qeth_free_buffer_pool(card);
226 return -ENOMEM;
227 }
228 for (j = 0; j < QETH_MAX_BUFFER_ELEMENTS(card); ++j) {
229 ptr = (void *) __get_free_page(GFP_KERNEL);
230 if (!ptr) {
231 while (j > 0)
232 free_page((unsigned long)
233 pool_entry->elements[--j]);
234 kfree(pool_entry);
235 qeth_free_buffer_pool(card);
236 return -ENOMEM;
237 }
238 pool_entry->elements[j] = ptr;
239 }
240 list_add(&pool_entry->init_list,
241 &card->qdio.init_pool.entry_list);
242 }
243 return 0;
244 }
245
qeth_realloc_buffer_pool(struct qeth_card * card,int bufcnt)246 int qeth_realloc_buffer_pool(struct qeth_card *card, int bufcnt)
247 {
248 QETH_CARD_TEXT(card, 2, "realcbp");
249
250 if (card->state != CARD_STATE_DOWN)
251 return -EPERM;
252
253 /* TODO: steel/add buffers from/to a running card's buffer pool (?) */
254 qeth_clear_working_pool_list(card);
255 qeth_free_buffer_pool(card);
256 card->qdio.in_buf_pool.buf_count = bufcnt;
257 card->qdio.init_pool.buf_count = bufcnt;
258 return qeth_alloc_buffer_pool(card);
259 }
260 EXPORT_SYMBOL_GPL(qeth_realloc_buffer_pool);
261
qeth_free_qdio_queue(struct qeth_qdio_q * q)262 static void qeth_free_qdio_queue(struct qeth_qdio_q *q)
263 {
264 if (!q)
265 return;
266
267 qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
268 kfree(q);
269 }
270
qeth_alloc_qdio_queue(void)271 static struct qeth_qdio_q *qeth_alloc_qdio_queue(void)
272 {
273 struct qeth_qdio_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
274 int i;
275
276 if (!q)
277 return NULL;
278
279 if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
280 kfree(q);
281 return NULL;
282 }
283
284 for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i)
285 q->bufs[i].buffer = q->qdio_bufs[i];
286
287 QETH_DBF_HEX(SETUP, 2, &q, sizeof(void *));
288 return q;
289 }
290
qeth_cq_init(struct qeth_card * card)291 static int qeth_cq_init(struct qeth_card *card)
292 {
293 int rc;
294
295 if (card->options.cq == QETH_CQ_ENABLED) {
296 QETH_CARD_TEXT(card, 2, "cqinit");
297 qdio_reset_buffers(card->qdio.c_q->qdio_bufs,
298 QDIO_MAX_BUFFERS_PER_Q);
299 card->qdio.c_q->next_buf_to_init = 127;
300 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT,
301 card->qdio.no_in_queues - 1, 0,
302 127);
303 if (rc) {
304 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
305 goto out;
306 }
307 }
308 rc = 0;
309 out:
310 return rc;
311 }
312
qeth_alloc_cq(struct qeth_card * card)313 static int qeth_alloc_cq(struct qeth_card *card)
314 {
315 int rc;
316
317 if (card->options.cq == QETH_CQ_ENABLED) {
318 int i;
319 struct qdio_outbuf_state *outbuf_states;
320
321 QETH_CARD_TEXT(card, 2, "cqon");
322 card->qdio.c_q = qeth_alloc_qdio_queue();
323 if (!card->qdio.c_q) {
324 rc = -1;
325 goto kmsg_out;
326 }
327 card->qdio.no_in_queues = 2;
328 card->qdio.out_bufstates =
329 kcalloc(card->qdio.no_out_queues *
330 QDIO_MAX_BUFFERS_PER_Q,
331 sizeof(struct qdio_outbuf_state),
332 GFP_KERNEL);
333 outbuf_states = card->qdio.out_bufstates;
334 if (outbuf_states == NULL) {
335 rc = -1;
336 goto free_cq_out;
337 }
338 for (i = 0; i < card->qdio.no_out_queues; ++i) {
339 card->qdio.out_qs[i]->bufstates = outbuf_states;
340 outbuf_states += QDIO_MAX_BUFFERS_PER_Q;
341 }
342 } else {
343 QETH_CARD_TEXT(card, 2, "nocq");
344 card->qdio.c_q = NULL;
345 card->qdio.no_in_queues = 1;
346 }
347 QETH_CARD_TEXT_(card, 2, "iqc%d", card->qdio.no_in_queues);
348 rc = 0;
349 out:
350 return rc;
351 free_cq_out:
352 qeth_free_qdio_queue(card->qdio.c_q);
353 card->qdio.c_q = NULL;
354 kmsg_out:
355 dev_err(&card->gdev->dev, "Failed to create completion queue\n");
356 goto out;
357 }
358
qeth_free_cq(struct qeth_card * card)359 static void qeth_free_cq(struct qeth_card *card)
360 {
361 if (card->qdio.c_q) {
362 --card->qdio.no_in_queues;
363 qeth_free_qdio_queue(card->qdio.c_q);
364 card->qdio.c_q = NULL;
365 }
366 kfree(card->qdio.out_bufstates);
367 card->qdio.out_bufstates = NULL;
368 }
369
qeth_compute_cq_notification(int sbalf15,int delayed)370 static enum iucv_tx_notify qeth_compute_cq_notification(int sbalf15,
371 int delayed)
372 {
373 enum iucv_tx_notify n;
374
375 switch (sbalf15) {
376 case 0:
377 n = delayed ? TX_NOTIFY_DELAYED_OK : TX_NOTIFY_OK;
378 break;
379 case 4:
380 case 16:
381 case 17:
382 case 18:
383 n = delayed ? TX_NOTIFY_DELAYED_UNREACHABLE :
384 TX_NOTIFY_UNREACHABLE;
385 break;
386 default:
387 n = delayed ? TX_NOTIFY_DELAYED_GENERALERROR :
388 TX_NOTIFY_GENERALERROR;
389 break;
390 }
391
392 return n;
393 }
394
qeth_cleanup_handled_pending(struct qeth_qdio_out_q * q,int bidx,int forced_cleanup)395 static void qeth_cleanup_handled_pending(struct qeth_qdio_out_q *q, int bidx,
396 int forced_cleanup)
397 {
398 if (q->card->options.cq != QETH_CQ_ENABLED)
399 return;
400
401 if (q->bufs[bidx]->next_pending != NULL) {
402 struct qeth_qdio_out_buffer *head = q->bufs[bidx];
403 struct qeth_qdio_out_buffer *c = q->bufs[bidx]->next_pending;
404
405 while (c) {
406 if (forced_cleanup ||
407 atomic_read(&c->state) ==
408 QETH_QDIO_BUF_HANDLED_DELAYED) {
409 struct qeth_qdio_out_buffer *f = c;
410 QETH_CARD_TEXT(f->q->card, 5, "fp");
411 QETH_CARD_TEXT_(f->q->card, 5, "%lx", (long) f);
412 /* release here to avoid interleaving between
413 outbound tasklet and inbound tasklet
414 regarding notifications and lifecycle */
415 qeth_tx_complete_buf(c, forced_cleanup, 0);
416
417 c = f->next_pending;
418 WARN_ON_ONCE(head->next_pending != f);
419 head->next_pending = c;
420 kmem_cache_free(qeth_qdio_outbuf_cache, f);
421 } else {
422 head = c;
423 c = c->next_pending;
424 }
425
426 }
427 }
428 if (forced_cleanup && (atomic_read(&(q->bufs[bidx]->state)) ==
429 QETH_QDIO_BUF_HANDLED_DELAYED)) {
430 /* for recovery situations */
431 qeth_init_qdio_out_buf(q, bidx);
432 QETH_CARD_TEXT(q->card, 2, "clprecov");
433 }
434 }
435
436
qeth_qdio_handle_aob(struct qeth_card * card,unsigned long phys_aob_addr)437 static void qeth_qdio_handle_aob(struct qeth_card *card,
438 unsigned long phys_aob_addr)
439 {
440 struct qaob *aob;
441 struct qeth_qdio_out_buffer *buffer;
442 enum iucv_tx_notify notification;
443 unsigned int i;
444
445 aob = (struct qaob *) phys_to_virt(phys_aob_addr);
446 QETH_CARD_TEXT(card, 5, "haob");
447 QETH_CARD_TEXT_(card, 5, "%lx", phys_aob_addr);
448 buffer = (struct qeth_qdio_out_buffer *) aob->user1;
449 QETH_CARD_TEXT_(card, 5, "%lx", aob->user1);
450
451 if (atomic_cmpxchg(&buffer->state, QETH_QDIO_BUF_PRIMED,
452 QETH_QDIO_BUF_IN_CQ) == QETH_QDIO_BUF_PRIMED) {
453 notification = TX_NOTIFY_OK;
454 } else {
455 WARN_ON_ONCE(atomic_read(&buffer->state) !=
456 QETH_QDIO_BUF_PENDING);
457 atomic_set(&buffer->state, QETH_QDIO_BUF_IN_CQ);
458 notification = TX_NOTIFY_DELAYED_OK;
459 }
460
461 if (aob->aorc != 0) {
462 QETH_CARD_TEXT_(card, 2, "aorc%02X", aob->aorc);
463 notification = qeth_compute_cq_notification(aob->aorc, 1);
464 }
465 qeth_notify_skbs(buffer->q, buffer, notification);
466
467 /* Free dangling allocations. The attached skbs are handled by
468 * qeth_cleanup_handled_pending().
469 */
470 for (i = 0;
471 i < aob->sb_count && i < QETH_MAX_BUFFER_ELEMENTS(card);
472 i++) {
473 if (aob->sba[i] && buffer->is_header[i])
474 kmem_cache_free(qeth_core_header_cache,
475 (void *) aob->sba[i]);
476 }
477 atomic_set(&buffer->state, QETH_QDIO_BUF_HANDLED_DELAYED);
478
479 qdio_release_aob(aob);
480 }
481
qeth_is_cq(struct qeth_card * card,unsigned int queue)482 static inline int qeth_is_cq(struct qeth_card *card, unsigned int queue)
483 {
484 return card->options.cq == QETH_CQ_ENABLED &&
485 card->qdio.c_q != NULL &&
486 queue != 0 &&
487 queue == card->qdio.no_in_queues - 1;
488 }
489
qeth_setup_ccw(struct ccw1 * ccw,u8 cmd_code,u8 flags,u32 len,void * data)490 static void qeth_setup_ccw(struct ccw1 *ccw, u8 cmd_code, u8 flags, u32 len,
491 void *data)
492 {
493 ccw->cmd_code = cmd_code;
494 ccw->flags = flags | CCW_FLAG_SLI;
495 ccw->count = len;
496 ccw->cda = (__u32) __pa(data);
497 }
498
__qeth_issue_next_read(struct qeth_card * card)499 static int __qeth_issue_next_read(struct qeth_card *card)
500 {
501 struct qeth_cmd_buffer *iob = card->read_cmd;
502 struct qeth_channel *channel = iob->channel;
503 struct ccw1 *ccw = __ccw_from_cmd(iob);
504 int rc;
505
506 QETH_CARD_TEXT(card, 5, "issnxrd");
507 if (channel->state != CH_STATE_UP)
508 return -EIO;
509
510 memset(iob->data, 0, iob->length);
511 qeth_setup_ccw(ccw, CCW_CMD_READ, 0, iob->length, iob->data);
512 iob->callback = qeth_issue_next_read_cb;
513 /* keep the cmd alive after completion: */
514 qeth_get_cmd(iob);
515
516 QETH_CARD_TEXT(card, 6, "noirqpnd");
517 rc = ccw_device_start(channel->ccwdev, ccw, (addr_t) iob, 0, 0);
518 if (rc) {
519 QETH_DBF_MESSAGE(2, "error %i on device %x when starting next read ccw!\n",
520 rc, CARD_DEVID(card));
521 atomic_set(&channel->irq_pending, 0);
522 qeth_put_cmd(iob);
523 card->read_or_write_problem = 1;
524 qeth_schedule_recovery(card);
525 wake_up(&card->wait_q);
526 }
527 return rc;
528 }
529
qeth_issue_next_read(struct qeth_card * card)530 static int qeth_issue_next_read(struct qeth_card *card)
531 {
532 int ret;
533
534 spin_lock_irq(get_ccwdev_lock(CARD_RDEV(card)));
535 ret = __qeth_issue_next_read(card);
536 spin_unlock_irq(get_ccwdev_lock(CARD_RDEV(card)));
537
538 return ret;
539 }
540
qeth_enqueue_cmd(struct qeth_card * card,struct qeth_cmd_buffer * iob)541 static void qeth_enqueue_cmd(struct qeth_card *card,
542 struct qeth_cmd_buffer *iob)
543 {
544 spin_lock_irq(&card->lock);
545 list_add_tail(&iob->list, &card->cmd_waiter_list);
546 spin_unlock_irq(&card->lock);
547 }
548
qeth_dequeue_cmd(struct qeth_card * card,struct qeth_cmd_buffer * iob)549 static void qeth_dequeue_cmd(struct qeth_card *card,
550 struct qeth_cmd_buffer *iob)
551 {
552 spin_lock_irq(&card->lock);
553 list_del(&iob->list);
554 spin_unlock_irq(&card->lock);
555 }
556
qeth_notify_cmd(struct qeth_cmd_buffer * iob,int reason)557 void qeth_notify_cmd(struct qeth_cmd_buffer *iob, int reason)
558 {
559 iob->rc = reason;
560 complete(&iob->done);
561 }
562 EXPORT_SYMBOL_GPL(qeth_notify_cmd);
563
qeth_issue_ipa_msg(struct qeth_ipa_cmd * cmd,int rc,struct qeth_card * card)564 static void qeth_issue_ipa_msg(struct qeth_ipa_cmd *cmd, int rc,
565 struct qeth_card *card)
566 {
567 const char *ipa_name;
568 int com = cmd->hdr.command;
569 ipa_name = qeth_get_ipa_cmd_name(com);
570
571 if (rc)
572 QETH_DBF_MESSAGE(2, "IPA: %s(%#x) for device %x returned %#x \"%s\"\n",
573 ipa_name, com, CARD_DEVID(card), rc,
574 qeth_get_ipa_msg(rc));
575 else
576 QETH_DBF_MESSAGE(5, "IPA: %s(%#x) for device %x succeeded\n",
577 ipa_name, com, CARD_DEVID(card));
578 }
579
qeth_check_ipa_data(struct qeth_card * card,struct qeth_ipa_cmd * cmd)580 static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card,
581 struct qeth_ipa_cmd *cmd)
582 {
583 QETH_CARD_TEXT(card, 5, "chkipad");
584
585 if (IS_IPA_REPLY(cmd)) {
586 if (cmd->hdr.command != IPA_CMD_SETCCID &&
587 cmd->hdr.command != IPA_CMD_DELCCID &&
588 cmd->hdr.command != IPA_CMD_MODCCID &&
589 cmd->hdr.command != IPA_CMD_SET_DIAG_ASS)
590 qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
591 return cmd;
592 }
593
594 /* handle unsolicited event: */
595 switch (cmd->hdr.command) {
596 case IPA_CMD_STOPLAN:
597 if (cmd->hdr.return_code == IPA_RC_VEPA_TO_VEB_TRANSITION) {
598 dev_err(&card->gdev->dev,
599 "Interface %s is down because the adjacent port is no longer in reflective relay mode\n",
600 QETH_CARD_IFNAME(card));
601 schedule_work(&card->close_dev_work);
602 } else {
603 dev_warn(&card->gdev->dev,
604 "The link for interface %s on CHPID 0x%X failed\n",
605 QETH_CARD_IFNAME(card), card->info.chpid);
606 qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
607 netif_carrier_off(card->dev);
608 }
609 return NULL;
610 case IPA_CMD_STARTLAN:
611 dev_info(&card->gdev->dev,
612 "The link for %s on CHPID 0x%X has been restored\n",
613 QETH_CARD_IFNAME(card), card->info.chpid);
614 if (card->info.hwtrap)
615 card->info.hwtrap = 2;
616 qeth_schedule_recovery(card);
617 return NULL;
618 case IPA_CMD_SETBRIDGEPORT_IQD:
619 case IPA_CMD_SETBRIDGEPORT_OSA:
620 case IPA_CMD_ADDRESS_CHANGE_NOTIF:
621 if (card->discipline->control_event_handler(card, cmd))
622 return cmd;
623 return NULL;
624 case IPA_CMD_MODCCID:
625 return cmd;
626 case IPA_CMD_REGISTER_LOCAL_ADDR:
627 QETH_CARD_TEXT(card, 3, "irla");
628 return NULL;
629 case IPA_CMD_UNREGISTER_LOCAL_ADDR:
630 QETH_CARD_TEXT(card, 3, "urla");
631 return NULL;
632 default:
633 QETH_DBF_MESSAGE(2, "Received data is IPA but not a reply!\n");
634 return cmd;
635 }
636 }
637
qeth_clear_ipacmd_list(struct qeth_card * card)638 void qeth_clear_ipacmd_list(struct qeth_card *card)
639 {
640 struct qeth_cmd_buffer *iob;
641 unsigned long flags;
642
643 QETH_CARD_TEXT(card, 4, "clipalst");
644
645 spin_lock_irqsave(&card->lock, flags);
646 list_for_each_entry(iob, &card->cmd_waiter_list, list)
647 qeth_notify_cmd(iob, -EIO);
648 spin_unlock_irqrestore(&card->lock, flags);
649 }
650 EXPORT_SYMBOL_GPL(qeth_clear_ipacmd_list);
651
qeth_check_idx_response(struct qeth_card * card,unsigned char * buffer)652 static int qeth_check_idx_response(struct qeth_card *card,
653 unsigned char *buffer)
654 {
655 QETH_DBF_HEX(CTRL, 2, buffer, QETH_DBF_CTRL_LEN);
656 if ((buffer[2] & 0xc0) == 0xc0) {
657 QETH_DBF_MESSAGE(2, "received an IDX TERMINATE with cause code %#04x\n",
658 buffer[4]);
659 QETH_CARD_TEXT(card, 2, "ckidxres");
660 QETH_CARD_TEXT(card, 2, " idxterm");
661 QETH_CARD_TEXT_(card, 2, " rc%d", -EIO);
662 if (buffer[4] == 0xf6) {
663 dev_err(&card->gdev->dev,
664 "The qeth device is not configured "
665 "for the OSI layer required by z/VM\n");
666 return -EPERM;
667 }
668 return -EIO;
669 }
670 return 0;
671 }
672
qeth_put_cmd(struct qeth_cmd_buffer * iob)673 void qeth_put_cmd(struct qeth_cmd_buffer *iob)
674 {
675 if (refcount_dec_and_test(&iob->ref_count)) {
676 kfree(iob->data);
677 kfree(iob);
678 }
679 }
680 EXPORT_SYMBOL_GPL(qeth_put_cmd);
681
qeth_release_buffer_cb(struct qeth_card * card,struct qeth_cmd_buffer * iob,unsigned int data_length)682 static void qeth_release_buffer_cb(struct qeth_card *card,
683 struct qeth_cmd_buffer *iob,
684 unsigned int data_length)
685 {
686 qeth_put_cmd(iob);
687 }
688
qeth_cancel_cmd(struct qeth_cmd_buffer * iob,int rc)689 static void qeth_cancel_cmd(struct qeth_cmd_buffer *iob, int rc)
690 {
691 qeth_notify_cmd(iob, rc);
692 qeth_put_cmd(iob);
693 }
694
qeth_alloc_cmd(struct qeth_channel * channel,unsigned int length,unsigned int ccws,long timeout)695 struct qeth_cmd_buffer *qeth_alloc_cmd(struct qeth_channel *channel,
696 unsigned int length, unsigned int ccws,
697 long timeout)
698 {
699 struct qeth_cmd_buffer *iob;
700
701 if (length > QETH_BUFSIZE)
702 return NULL;
703
704 iob = kzalloc(sizeof(*iob), GFP_KERNEL);
705 if (!iob)
706 return NULL;
707
708 iob->data = kzalloc(ALIGN(length, 8) + ccws * sizeof(struct ccw1),
709 GFP_KERNEL | GFP_DMA);
710 if (!iob->data) {
711 kfree(iob);
712 return NULL;
713 }
714
715 init_completion(&iob->done);
716 spin_lock_init(&iob->lock);
717 INIT_LIST_HEAD(&iob->list);
718 refcount_set(&iob->ref_count, 1);
719 iob->channel = channel;
720 iob->timeout = timeout;
721 iob->length = length;
722 return iob;
723 }
724 EXPORT_SYMBOL_GPL(qeth_alloc_cmd);
725
qeth_issue_next_read_cb(struct qeth_card * card,struct qeth_cmd_buffer * iob,unsigned int data_length)726 static void qeth_issue_next_read_cb(struct qeth_card *card,
727 struct qeth_cmd_buffer *iob,
728 unsigned int data_length)
729 {
730 struct qeth_cmd_buffer *request = NULL;
731 struct qeth_ipa_cmd *cmd = NULL;
732 struct qeth_reply *reply = NULL;
733 struct qeth_cmd_buffer *tmp;
734 unsigned long flags;
735 int rc = 0;
736
737 QETH_CARD_TEXT(card, 4, "sndctlcb");
738 rc = qeth_check_idx_response(card, iob->data);
739 switch (rc) {
740 case 0:
741 break;
742 case -EIO:
743 qeth_clear_ipacmd_list(card);
744 qeth_schedule_recovery(card);
745 /* fall through */
746 default:
747 goto out;
748 }
749
750 if (IS_IPA(iob->data)) {
751 cmd = (struct qeth_ipa_cmd *) PDU_ENCAPSULATION(iob->data);
752 cmd = qeth_check_ipa_data(card, cmd);
753 if (!cmd)
754 goto out;
755 if (IS_OSN(card) && card->osn_info.assist_cb &&
756 cmd->hdr.command != IPA_CMD_STARTLAN) {
757 card->osn_info.assist_cb(card->dev, cmd);
758 goto out;
759 }
760 } else {
761 /* non-IPA commands should only flow during initialization */
762 if (card->state != CARD_STATE_DOWN)
763 goto out;
764 }
765
766 /* match against pending cmd requests */
767 spin_lock_irqsave(&card->lock, flags);
768 list_for_each_entry(tmp, &card->cmd_waiter_list, list) {
769 if (!IS_IPA(tmp->data) ||
770 __ipa_cmd(tmp)->hdr.seqno == cmd->hdr.seqno) {
771 request = tmp;
772 /* take the object outside the lock */
773 qeth_get_cmd(request);
774 break;
775 }
776 }
777 spin_unlock_irqrestore(&card->lock, flags);
778
779 if (!request)
780 goto out;
781
782 reply = &request->reply;
783 if (!reply->callback) {
784 rc = 0;
785 goto no_callback;
786 }
787
788 spin_lock_irqsave(&request->lock, flags);
789 if (request->rc)
790 /* Bail out when the requestor has already left: */
791 rc = request->rc;
792 else
793 rc = reply->callback(card, reply, cmd ? (unsigned long)cmd :
794 (unsigned long)iob);
795 spin_unlock_irqrestore(&request->lock, flags);
796
797 no_callback:
798 if (rc <= 0)
799 qeth_notify_cmd(request, rc);
800 qeth_put_cmd(request);
801 out:
802 memcpy(&card->seqno.pdu_hdr_ack,
803 QETH_PDU_HEADER_SEQ_NO(iob->data),
804 QETH_SEQ_NO_LENGTH);
805 qeth_put_cmd(iob);
806 __qeth_issue_next_read(card);
807 }
808
qeth_set_thread_start_bit(struct qeth_card * card,unsigned long thread)809 static int qeth_set_thread_start_bit(struct qeth_card *card,
810 unsigned long thread)
811 {
812 unsigned long flags;
813
814 spin_lock_irqsave(&card->thread_mask_lock, flags);
815 if (!(card->thread_allowed_mask & thread) ||
816 (card->thread_start_mask & thread)) {
817 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
818 return -EPERM;
819 }
820 card->thread_start_mask |= thread;
821 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
822 return 0;
823 }
824
qeth_clear_thread_start_bit(struct qeth_card * card,unsigned long thread)825 void qeth_clear_thread_start_bit(struct qeth_card *card, unsigned long thread)
826 {
827 unsigned long flags;
828
829 spin_lock_irqsave(&card->thread_mask_lock, flags);
830 card->thread_start_mask &= ~thread;
831 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
832 wake_up(&card->wait_q);
833 }
834 EXPORT_SYMBOL_GPL(qeth_clear_thread_start_bit);
835
qeth_clear_thread_running_bit(struct qeth_card * card,unsigned long thread)836 void qeth_clear_thread_running_bit(struct qeth_card *card, unsigned long thread)
837 {
838 unsigned long flags;
839
840 spin_lock_irqsave(&card->thread_mask_lock, flags);
841 card->thread_running_mask &= ~thread;
842 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
843 wake_up_all(&card->wait_q);
844 }
845 EXPORT_SYMBOL_GPL(qeth_clear_thread_running_bit);
846
__qeth_do_run_thread(struct qeth_card * card,unsigned long thread)847 static int __qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
848 {
849 unsigned long flags;
850 int rc = 0;
851
852 spin_lock_irqsave(&card->thread_mask_lock, flags);
853 if (card->thread_start_mask & thread) {
854 if ((card->thread_allowed_mask & thread) &&
855 !(card->thread_running_mask & thread)) {
856 rc = 1;
857 card->thread_start_mask &= ~thread;
858 card->thread_running_mask |= thread;
859 } else
860 rc = -EPERM;
861 }
862 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
863 return rc;
864 }
865
qeth_do_run_thread(struct qeth_card * card,unsigned long thread)866 int qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
867 {
868 int rc = 0;
869
870 wait_event(card->wait_q,
871 (rc = __qeth_do_run_thread(card, thread)) >= 0);
872 return rc;
873 }
874 EXPORT_SYMBOL_GPL(qeth_do_run_thread);
875
qeth_schedule_recovery(struct qeth_card * card)876 void qeth_schedule_recovery(struct qeth_card *card)
877 {
878 QETH_CARD_TEXT(card, 2, "startrec");
879 if (qeth_set_thread_start_bit(card, QETH_RECOVER_THREAD) == 0)
880 schedule_work(&card->kernel_thread_starter);
881 }
882 EXPORT_SYMBOL_GPL(qeth_schedule_recovery);
883
qeth_get_problem(struct qeth_card * card,struct ccw_device * cdev,struct irb * irb)884 static int qeth_get_problem(struct qeth_card *card, struct ccw_device *cdev,
885 struct irb *irb)
886 {
887 int dstat, cstat;
888 char *sense;
889
890 sense = (char *) irb->ecw;
891 cstat = irb->scsw.cmd.cstat;
892 dstat = irb->scsw.cmd.dstat;
893
894 if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK |
895 SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK |
896 SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) {
897 QETH_CARD_TEXT(card, 2, "CGENCHK");
898 dev_warn(&cdev->dev, "The qeth device driver "
899 "failed to recover an error on the device\n");
900 QETH_DBF_MESSAGE(2, "check on channel %x with dstat=%#x, cstat=%#x\n",
901 CCW_DEVID(cdev), dstat, cstat);
902 print_hex_dump(KERN_WARNING, "qeth: irb ", DUMP_PREFIX_OFFSET,
903 16, 1, irb, 64, 1);
904 return -EIO;
905 }
906
907 if (dstat & DEV_STAT_UNIT_CHECK) {
908 if (sense[SENSE_RESETTING_EVENT_BYTE] &
909 SENSE_RESETTING_EVENT_FLAG) {
910 QETH_CARD_TEXT(card, 2, "REVIND");
911 return -EIO;
912 }
913 if (sense[SENSE_COMMAND_REJECT_BYTE] &
914 SENSE_COMMAND_REJECT_FLAG) {
915 QETH_CARD_TEXT(card, 2, "CMDREJi");
916 return -EIO;
917 }
918 if ((sense[2] == 0xaf) && (sense[3] == 0xfe)) {
919 QETH_CARD_TEXT(card, 2, "AFFE");
920 return -EIO;
921 }
922 if ((!sense[0]) && (!sense[1]) && (!sense[2]) && (!sense[3])) {
923 QETH_CARD_TEXT(card, 2, "ZEROSEN");
924 return 0;
925 }
926 QETH_CARD_TEXT(card, 2, "DGENCHK");
927 return -EIO;
928 }
929 return 0;
930 }
931
qeth_check_irb_error(struct qeth_card * card,struct ccw_device * cdev,struct irb * irb)932 static int qeth_check_irb_error(struct qeth_card *card, struct ccw_device *cdev,
933 struct irb *irb)
934 {
935 if (!IS_ERR(irb))
936 return 0;
937
938 switch (PTR_ERR(irb)) {
939 case -EIO:
940 QETH_DBF_MESSAGE(2, "i/o-error on channel %x\n",
941 CCW_DEVID(cdev));
942 QETH_CARD_TEXT(card, 2, "ckirberr");
943 QETH_CARD_TEXT_(card, 2, " rc%d", -EIO);
944 return -EIO;
945 case -ETIMEDOUT:
946 dev_warn(&cdev->dev, "A hardware operation timed out"
947 " on the device\n");
948 QETH_CARD_TEXT(card, 2, "ckirberr");
949 QETH_CARD_TEXT_(card, 2, " rc%d", -ETIMEDOUT);
950 return -ETIMEDOUT;
951 default:
952 QETH_DBF_MESSAGE(2, "unknown error %ld on channel %x\n",
953 PTR_ERR(irb), CCW_DEVID(cdev));
954 QETH_CARD_TEXT(card, 2, "ckirberr");
955 QETH_CARD_TEXT(card, 2, " rc???");
956 return PTR_ERR(irb);
957 }
958 }
959
qeth_irq(struct ccw_device * cdev,unsigned long intparm,struct irb * irb)960 static void qeth_irq(struct ccw_device *cdev, unsigned long intparm,
961 struct irb *irb)
962 {
963 int rc;
964 int cstat, dstat;
965 struct qeth_cmd_buffer *iob = NULL;
966 struct ccwgroup_device *gdev;
967 struct qeth_channel *channel;
968 struct qeth_card *card;
969
970 /* while we hold the ccwdev lock, this stays valid: */
971 gdev = dev_get_drvdata(&cdev->dev);
972 card = dev_get_drvdata(&gdev->dev);
973 if (!card)
974 return;
975
976 QETH_CARD_TEXT(card, 5, "irq");
977
978 if (card->read.ccwdev == cdev) {
979 channel = &card->read;
980 QETH_CARD_TEXT(card, 5, "read");
981 } else if (card->write.ccwdev == cdev) {
982 channel = &card->write;
983 QETH_CARD_TEXT(card, 5, "write");
984 } else {
985 channel = &card->data;
986 QETH_CARD_TEXT(card, 5, "data");
987 }
988
989 if (qeth_intparm_is_iob(intparm))
990 iob = (struct qeth_cmd_buffer *) __va((addr_t)intparm);
991
992 rc = qeth_check_irb_error(card, cdev, irb);
993 if (rc) {
994 /* IO was terminated, free its resources. */
995 if (iob)
996 qeth_cancel_cmd(iob, rc);
997 atomic_set(&channel->irq_pending, 0);
998 wake_up(&card->wait_q);
999 return;
1000 }
1001
1002 atomic_set(&channel->irq_pending, 0);
1003
1004 if (irb->scsw.cmd.fctl & (SCSW_FCTL_CLEAR_FUNC))
1005 channel->state = CH_STATE_STOPPED;
1006
1007 if (irb->scsw.cmd.fctl & (SCSW_FCTL_HALT_FUNC))
1008 channel->state = CH_STATE_HALTED;
1009
1010 if (intparm == QETH_CLEAR_CHANNEL_PARM) {
1011 QETH_CARD_TEXT(card, 6, "clrchpar");
1012 /* we don't have to handle this further */
1013 intparm = 0;
1014 }
1015 if (intparm == QETH_HALT_CHANNEL_PARM) {
1016 QETH_CARD_TEXT(card, 6, "hltchpar");
1017 /* we don't have to handle this further */
1018 intparm = 0;
1019 }
1020
1021 cstat = irb->scsw.cmd.cstat;
1022 dstat = irb->scsw.cmd.dstat;
1023
1024 if ((dstat & DEV_STAT_UNIT_EXCEP) ||
1025 (dstat & DEV_STAT_UNIT_CHECK) ||
1026 (cstat)) {
1027 if (irb->esw.esw0.erw.cons) {
1028 dev_warn(&channel->ccwdev->dev,
1029 "The qeth device driver failed to recover "
1030 "an error on the device\n");
1031 QETH_DBF_MESSAGE(2, "sense data available on channel %x: cstat %#X dstat %#X\n",
1032 CCW_DEVID(channel->ccwdev), cstat,
1033 dstat);
1034 print_hex_dump(KERN_WARNING, "qeth: irb ",
1035 DUMP_PREFIX_OFFSET, 16, 1, irb, 32, 1);
1036 print_hex_dump(KERN_WARNING, "qeth: sense data ",
1037 DUMP_PREFIX_OFFSET, 16, 1, irb->ecw, 32, 1);
1038 }
1039
1040 rc = qeth_get_problem(card, cdev, irb);
1041 if (rc) {
1042 card->read_or_write_problem = 1;
1043 if (iob)
1044 qeth_cancel_cmd(iob, rc);
1045 qeth_clear_ipacmd_list(card);
1046 qeth_schedule_recovery(card);
1047 goto out;
1048 }
1049 }
1050
1051 if (iob) {
1052 /* sanity check: */
1053 if (irb->scsw.cmd.count > iob->length) {
1054 qeth_cancel_cmd(iob, -EIO);
1055 goto out;
1056 }
1057 if (iob->callback)
1058 iob->callback(card, iob,
1059 iob->length - irb->scsw.cmd.count);
1060 }
1061
1062 out:
1063 wake_up(&card->wait_q);
1064 return;
1065 }
1066
qeth_notify_skbs(struct qeth_qdio_out_q * q,struct qeth_qdio_out_buffer * buf,enum iucv_tx_notify notification)1067 static void qeth_notify_skbs(struct qeth_qdio_out_q *q,
1068 struct qeth_qdio_out_buffer *buf,
1069 enum iucv_tx_notify notification)
1070 {
1071 struct sk_buff *skb;
1072
1073 skb_queue_walk(&buf->skb_list, skb) {
1074 QETH_CARD_TEXT_(q->card, 5, "skbn%d", notification);
1075 QETH_CARD_TEXT_(q->card, 5, "%lx", (long) skb);
1076 if (skb->protocol == htons(ETH_P_AF_IUCV) && skb->sk)
1077 iucv_sk(skb->sk)->sk_txnotify(skb, notification);
1078 }
1079 }
1080
qeth_tx_complete_buf(struct qeth_qdio_out_buffer * buf,bool error,int budget)1081 static void qeth_tx_complete_buf(struct qeth_qdio_out_buffer *buf, bool error,
1082 int budget)
1083 {
1084 struct qeth_qdio_out_q *queue = buf->q;
1085 struct sk_buff *skb;
1086
1087 /* release may never happen from within CQ tasklet scope */
1088 WARN_ON_ONCE(atomic_read(&buf->state) == QETH_QDIO_BUF_IN_CQ);
1089
1090 if (atomic_read(&buf->state) == QETH_QDIO_BUF_PENDING)
1091 qeth_notify_skbs(queue, buf, TX_NOTIFY_GENERALERROR);
1092
1093 /* Empty buffer? */
1094 if (buf->next_element_to_fill == 0)
1095 return;
1096
1097 QETH_TXQ_STAT_INC(queue, bufs);
1098 QETH_TXQ_STAT_ADD(queue, buf_elements, buf->next_element_to_fill);
1099 while ((skb = __skb_dequeue(&buf->skb_list)) != NULL) {
1100 unsigned int bytes = qdisc_pkt_len(skb);
1101 bool is_tso = skb_is_gso(skb);
1102 unsigned int packets;
1103
1104 packets = is_tso ? skb_shinfo(skb)->gso_segs : 1;
1105 if (error) {
1106 QETH_TXQ_STAT_ADD(queue, tx_errors, packets);
1107 } else {
1108 QETH_TXQ_STAT_ADD(queue, tx_packets, packets);
1109 QETH_TXQ_STAT_ADD(queue, tx_bytes, bytes);
1110 if (skb->ip_summed == CHECKSUM_PARTIAL)
1111 QETH_TXQ_STAT_ADD(queue, skbs_csum, packets);
1112 if (skb_is_nonlinear(skb))
1113 QETH_TXQ_STAT_INC(queue, skbs_sg);
1114 if (is_tso) {
1115 QETH_TXQ_STAT_INC(queue, skbs_tso);
1116 QETH_TXQ_STAT_ADD(queue, tso_bytes, bytes);
1117 }
1118 }
1119
1120 napi_consume_skb(skb, budget);
1121 }
1122 }
1123
qeth_clear_output_buffer(struct qeth_qdio_out_q * queue,struct qeth_qdio_out_buffer * buf,bool error,int budget)1124 static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
1125 struct qeth_qdio_out_buffer *buf,
1126 bool error, int budget)
1127 {
1128 int i;
1129
1130 /* is PCI flag set on buffer? */
1131 if (buf->buffer->element[0].sflags & SBAL_SFLAGS0_PCI_REQ)
1132 atomic_dec(&queue->set_pci_flags_count);
1133
1134 qeth_tx_complete_buf(buf, error, budget);
1135
1136 for (i = 0; i < queue->max_elements; ++i) {
1137 if (buf->buffer->element[i].addr && buf->is_header[i])
1138 kmem_cache_free(qeth_core_header_cache,
1139 buf->buffer->element[i].addr);
1140 buf->is_header[i] = 0;
1141 }
1142
1143 qeth_scrub_qdio_buffer(buf->buffer, queue->max_elements);
1144 buf->next_element_to_fill = 0;
1145 buf->bytes = 0;
1146 atomic_set(&buf->state, QETH_QDIO_BUF_EMPTY);
1147 }
1148
qeth_drain_output_queue(struct qeth_qdio_out_q * q,bool free)1149 static void qeth_drain_output_queue(struct qeth_qdio_out_q *q, bool free)
1150 {
1151 int j;
1152
1153 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
1154 if (!q->bufs[j])
1155 continue;
1156 qeth_cleanup_handled_pending(q, j, 1);
1157 qeth_clear_output_buffer(q, q->bufs[j], true, 0);
1158 if (free) {
1159 kmem_cache_free(qeth_qdio_outbuf_cache, q->bufs[j]);
1160 q->bufs[j] = NULL;
1161 }
1162 }
1163 }
1164
qeth_drain_output_queues(struct qeth_card * card)1165 void qeth_drain_output_queues(struct qeth_card *card)
1166 {
1167 int i;
1168
1169 QETH_CARD_TEXT(card, 2, "clearqdbf");
1170 /* clear outbound buffers to free skbs */
1171 for (i = 0; i < card->qdio.no_out_queues; ++i) {
1172 if (card->qdio.out_qs[i])
1173 qeth_drain_output_queue(card->qdio.out_qs[i], false);
1174 }
1175 }
1176 EXPORT_SYMBOL_GPL(qeth_drain_output_queues);
1177
qeth_free_buffer_pool(struct qeth_card * card)1178 static void qeth_free_buffer_pool(struct qeth_card *card)
1179 {
1180 struct qeth_buffer_pool_entry *pool_entry, *tmp;
1181 int i = 0;
1182 list_for_each_entry_safe(pool_entry, tmp,
1183 &card->qdio.init_pool.entry_list, init_list){
1184 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i)
1185 free_page((unsigned long)pool_entry->elements[i]);
1186 list_del(&pool_entry->init_list);
1187 kfree(pool_entry);
1188 }
1189 }
1190
qeth_clean_channel(struct qeth_channel * channel)1191 static void qeth_clean_channel(struct qeth_channel *channel)
1192 {
1193 struct ccw_device *cdev = channel->ccwdev;
1194
1195 QETH_DBF_TEXT(SETUP, 2, "freech");
1196
1197 spin_lock_irq(get_ccwdev_lock(cdev));
1198 cdev->handler = NULL;
1199 spin_unlock_irq(get_ccwdev_lock(cdev));
1200 }
1201
qeth_setup_channel(struct qeth_channel * channel)1202 static void qeth_setup_channel(struct qeth_channel *channel)
1203 {
1204 struct ccw_device *cdev = channel->ccwdev;
1205
1206 QETH_DBF_TEXT(SETUP, 2, "setupch");
1207
1208 channel->state = CH_STATE_DOWN;
1209 atomic_set(&channel->irq_pending, 0);
1210
1211 spin_lock_irq(get_ccwdev_lock(cdev));
1212 cdev->handler = qeth_irq;
1213 spin_unlock_irq(get_ccwdev_lock(cdev));
1214 }
1215
qeth_osa_set_output_queues(struct qeth_card * card,bool single)1216 static int qeth_osa_set_output_queues(struct qeth_card *card, bool single)
1217 {
1218 unsigned int count = single ? 1 : card->dev->num_tx_queues;
1219 int rc;
1220
1221 rtnl_lock();
1222 rc = netif_set_real_num_tx_queues(card->dev, count);
1223 rtnl_unlock();
1224
1225 if (rc)
1226 return rc;
1227
1228 if (card->qdio.no_out_queues == count)
1229 return 0;
1230
1231 if (atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED)
1232 qeth_free_qdio_queues(card);
1233
1234 if (count == 1)
1235 dev_info(&card->gdev->dev, "Priority Queueing not supported\n");
1236
1237 card->qdio.default_out_queue = single ? 0 : QETH_DEFAULT_QUEUE;
1238 card->qdio.no_out_queues = count;
1239 return 0;
1240 }
1241
qeth_update_from_chp_desc(struct qeth_card * card)1242 static int qeth_update_from_chp_desc(struct qeth_card *card)
1243 {
1244 struct ccw_device *ccwdev;
1245 struct channel_path_desc_fmt0 *chp_dsc;
1246 int rc = 0;
1247
1248 QETH_CARD_TEXT(card, 2, "chp_desc");
1249
1250 ccwdev = card->data.ccwdev;
1251 chp_dsc = ccw_device_get_chp_desc(ccwdev, 0);
1252 if (!chp_dsc)
1253 return -ENOMEM;
1254
1255 card->info.func_level = 0x4100 + chp_dsc->desc;
1256
1257 if (IS_OSD(card) || IS_OSX(card))
1258 /* CHPP field bit 6 == 1 -> single queue */
1259 rc = qeth_osa_set_output_queues(card, chp_dsc->chpp & 0x02);
1260
1261 kfree(chp_dsc);
1262 QETH_CARD_TEXT_(card, 2, "nr:%x", card->qdio.no_out_queues);
1263 QETH_CARD_TEXT_(card, 2, "lvl:%02x", card->info.func_level);
1264 return rc;
1265 }
1266
qeth_init_qdio_info(struct qeth_card * card)1267 static void qeth_init_qdio_info(struct qeth_card *card)
1268 {
1269 QETH_CARD_TEXT(card, 4, "intqdinf");
1270 atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
1271 card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT;
1272 card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
1273
1274 /* inbound */
1275 card->qdio.no_in_queues = 1;
1276 card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
1277 if (IS_IQD(card))
1278 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_HSDEFAULT;
1279 else
1280 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_DEFAULT;
1281 card->qdio.in_buf_pool.buf_count = card->qdio.init_pool.buf_count;
1282 INIT_LIST_HEAD(&card->qdio.in_buf_pool.entry_list);
1283 INIT_LIST_HEAD(&card->qdio.init_pool.entry_list);
1284 }
1285
qeth_set_initial_options(struct qeth_card * card)1286 static void qeth_set_initial_options(struct qeth_card *card)
1287 {
1288 card->options.route4.type = NO_ROUTER;
1289 card->options.route6.type = NO_ROUTER;
1290 card->options.rx_sg_cb = QETH_RX_SG_CB;
1291 card->options.isolation = ISOLATION_MODE_NONE;
1292 card->options.cq = QETH_CQ_DISABLED;
1293 card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
1294 }
1295
qeth_do_start_thread(struct qeth_card * card,unsigned long thread)1296 static int qeth_do_start_thread(struct qeth_card *card, unsigned long thread)
1297 {
1298 unsigned long flags;
1299 int rc = 0;
1300
1301 spin_lock_irqsave(&card->thread_mask_lock, flags);
1302 QETH_CARD_TEXT_(card, 4, " %02x%02x%02x",
1303 (u8) card->thread_start_mask,
1304 (u8) card->thread_allowed_mask,
1305 (u8) card->thread_running_mask);
1306 rc = (card->thread_start_mask & thread);
1307 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1308 return rc;
1309 }
1310
qeth_start_kernel_thread(struct work_struct * work)1311 static void qeth_start_kernel_thread(struct work_struct *work)
1312 {
1313 struct task_struct *ts;
1314 struct qeth_card *card = container_of(work, struct qeth_card,
1315 kernel_thread_starter);
1316 QETH_CARD_TEXT(card , 2, "strthrd");
1317
1318 if (card->read.state != CH_STATE_UP &&
1319 card->write.state != CH_STATE_UP)
1320 return;
1321 if (qeth_do_start_thread(card, QETH_RECOVER_THREAD)) {
1322 ts = kthread_run(card->discipline->recover, (void *)card,
1323 "qeth_recover");
1324 if (IS_ERR(ts)) {
1325 qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1326 qeth_clear_thread_running_bit(card,
1327 QETH_RECOVER_THREAD);
1328 }
1329 }
1330 }
1331
1332 static void qeth_buffer_reclaim_work(struct work_struct *);
qeth_setup_card(struct qeth_card * card)1333 static void qeth_setup_card(struct qeth_card *card)
1334 {
1335 QETH_CARD_TEXT(card, 2, "setupcrd");
1336
1337 card->info.type = CARD_RDEV(card)->id.driver_info;
1338 card->state = CARD_STATE_DOWN;
1339 spin_lock_init(&card->lock);
1340 spin_lock_init(&card->thread_mask_lock);
1341 mutex_init(&card->conf_mutex);
1342 mutex_init(&card->discipline_mutex);
1343 INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread);
1344 INIT_LIST_HEAD(&card->cmd_waiter_list);
1345 init_waitqueue_head(&card->wait_q);
1346 qeth_set_initial_options(card);
1347 /* IP address takeover */
1348 INIT_LIST_HEAD(&card->ipato.entries);
1349 qeth_init_qdio_info(card);
1350 INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work);
1351 INIT_WORK(&card->close_dev_work, qeth_close_dev_handler);
1352 }
1353
qeth_core_sl_print(struct seq_file * m,struct service_level * slr)1354 static void qeth_core_sl_print(struct seq_file *m, struct service_level *slr)
1355 {
1356 struct qeth_card *card = container_of(slr, struct qeth_card,
1357 qeth_service_level);
1358 if (card->info.mcl_level[0])
1359 seq_printf(m, "qeth: %s firmware level %s\n",
1360 CARD_BUS_ID(card), card->info.mcl_level);
1361 }
1362
qeth_alloc_card(struct ccwgroup_device * gdev)1363 static struct qeth_card *qeth_alloc_card(struct ccwgroup_device *gdev)
1364 {
1365 struct qeth_card *card;
1366
1367 QETH_DBF_TEXT(SETUP, 2, "alloccrd");
1368 card = kzalloc(sizeof(*card), GFP_KERNEL);
1369 if (!card)
1370 goto out;
1371 QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1372
1373 card->gdev = gdev;
1374 dev_set_drvdata(&gdev->dev, card);
1375 CARD_RDEV(card) = gdev->cdev[0];
1376 CARD_WDEV(card) = gdev->cdev[1];
1377 CARD_DDEV(card) = gdev->cdev[2];
1378
1379 card->event_wq = alloc_ordered_workqueue("%s_event", 0,
1380 dev_name(&gdev->dev));
1381 if (!card->event_wq)
1382 goto out_wq;
1383
1384 card->read_cmd = qeth_alloc_cmd(&card->read, QETH_BUFSIZE, 1, 0);
1385 if (!card->read_cmd)
1386 goto out_read_cmd;
1387
1388 qeth_setup_channel(&card->read);
1389 qeth_setup_channel(&card->write);
1390 qeth_setup_channel(&card->data);
1391 card->qeth_service_level.seq_print = qeth_core_sl_print;
1392 register_service_level(&card->qeth_service_level);
1393 return card;
1394
1395 out_read_cmd:
1396 destroy_workqueue(card->event_wq);
1397 out_wq:
1398 dev_set_drvdata(&gdev->dev, NULL);
1399 kfree(card);
1400 out:
1401 return NULL;
1402 }
1403
qeth_clear_channel(struct qeth_card * card,struct qeth_channel * channel)1404 static int qeth_clear_channel(struct qeth_card *card,
1405 struct qeth_channel *channel)
1406 {
1407 int rc;
1408
1409 QETH_CARD_TEXT(card, 3, "clearch");
1410 spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1411 rc = ccw_device_clear(channel->ccwdev, QETH_CLEAR_CHANNEL_PARM);
1412 spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1413
1414 if (rc)
1415 return rc;
1416 rc = wait_event_interruptible_timeout(card->wait_q,
1417 channel->state == CH_STATE_STOPPED, QETH_TIMEOUT);
1418 if (rc == -ERESTARTSYS)
1419 return rc;
1420 if (channel->state != CH_STATE_STOPPED)
1421 return -ETIME;
1422 channel->state = CH_STATE_DOWN;
1423 return 0;
1424 }
1425
qeth_halt_channel(struct qeth_card * card,struct qeth_channel * channel)1426 static int qeth_halt_channel(struct qeth_card *card,
1427 struct qeth_channel *channel)
1428 {
1429 int rc;
1430
1431 QETH_CARD_TEXT(card, 3, "haltch");
1432 spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1433 rc = ccw_device_halt(channel->ccwdev, QETH_HALT_CHANNEL_PARM);
1434 spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1435
1436 if (rc)
1437 return rc;
1438 rc = wait_event_interruptible_timeout(card->wait_q,
1439 channel->state == CH_STATE_HALTED, QETH_TIMEOUT);
1440 if (rc == -ERESTARTSYS)
1441 return rc;
1442 if (channel->state != CH_STATE_HALTED)
1443 return -ETIME;
1444 return 0;
1445 }
1446
qeth_halt_channels(struct qeth_card * card)1447 static int qeth_halt_channels(struct qeth_card *card)
1448 {
1449 int rc1 = 0, rc2 = 0, rc3 = 0;
1450
1451 QETH_CARD_TEXT(card, 3, "haltchs");
1452 rc1 = qeth_halt_channel(card, &card->read);
1453 rc2 = qeth_halt_channel(card, &card->write);
1454 rc3 = qeth_halt_channel(card, &card->data);
1455 if (rc1)
1456 return rc1;
1457 if (rc2)
1458 return rc2;
1459 return rc3;
1460 }
1461
qeth_clear_channels(struct qeth_card * card)1462 static int qeth_clear_channels(struct qeth_card *card)
1463 {
1464 int rc1 = 0, rc2 = 0, rc3 = 0;
1465
1466 QETH_CARD_TEXT(card, 3, "clearchs");
1467 rc1 = qeth_clear_channel(card, &card->read);
1468 rc2 = qeth_clear_channel(card, &card->write);
1469 rc3 = qeth_clear_channel(card, &card->data);
1470 if (rc1)
1471 return rc1;
1472 if (rc2)
1473 return rc2;
1474 return rc3;
1475 }
1476
qeth_clear_halt_card(struct qeth_card * card,int halt)1477 static int qeth_clear_halt_card(struct qeth_card *card, int halt)
1478 {
1479 int rc = 0;
1480
1481 QETH_CARD_TEXT(card, 3, "clhacrd");
1482
1483 if (halt)
1484 rc = qeth_halt_channels(card);
1485 if (rc)
1486 return rc;
1487 return qeth_clear_channels(card);
1488 }
1489
qeth_qdio_clear_card(struct qeth_card * card,int use_halt)1490 int qeth_qdio_clear_card(struct qeth_card *card, int use_halt)
1491 {
1492 int rc = 0;
1493
1494 QETH_CARD_TEXT(card, 3, "qdioclr");
1495 switch (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ESTABLISHED,
1496 QETH_QDIO_CLEANING)) {
1497 case QETH_QDIO_ESTABLISHED:
1498 if (IS_IQD(card))
1499 rc = qdio_shutdown(CARD_DDEV(card),
1500 QDIO_FLAG_CLEANUP_USING_HALT);
1501 else
1502 rc = qdio_shutdown(CARD_DDEV(card),
1503 QDIO_FLAG_CLEANUP_USING_CLEAR);
1504 if (rc)
1505 QETH_CARD_TEXT_(card, 3, "1err%d", rc);
1506 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
1507 break;
1508 case QETH_QDIO_CLEANING:
1509 return rc;
1510 default:
1511 break;
1512 }
1513 rc = qeth_clear_halt_card(card, use_halt);
1514 if (rc)
1515 QETH_CARD_TEXT_(card, 3, "2err%d", rc);
1516 card->state = CARD_STATE_DOWN;
1517 return rc;
1518 }
1519 EXPORT_SYMBOL_GPL(qeth_qdio_clear_card);
1520
qeth_vm_detect_layer(struct qeth_card * card)1521 static enum qeth_discipline_id qeth_vm_detect_layer(struct qeth_card *card)
1522 {
1523 enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1524 struct diag26c_vnic_resp *response = NULL;
1525 struct diag26c_vnic_req *request = NULL;
1526 struct ccw_dev_id id;
1527 char userid[80];
1528 int rc = 0;
1529
1530 QETH_CARD_TEXT(card, 2, "vmlayer");
1531
1532 cpcmd("QUERY USERID", userid, sizeof(userid), &rc);
1533 if (rc)
1534 goto out;
1535
1536 request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
1537 response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
1538 if (!request || !response) {
1539 rc = -ENOMEM;
1540 goto out;
1541 }
1542
1543 ccw_device_get_id(CARD_RDEV(card), &id);
1544 request->resp_buf_len = sizeof(*response);
1545 request->resp_version = DIAG26C_VERSION6_VM65918;
1546 request->req_format = DIAG26C_VNIC_INFO;
1547 ASCEBC(userid, 8);
1548 memcpy(&request->sys_name, userid, 8);
1549 request->devno = id.devno;
1550
1551 QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1552 rc = diag26c(request, response, DIAG26C_PORT_VNIC);
1553 QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1554 if (rc)
1555 goto out;
1556 QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
1557
1558 if (request->resp_buf_len < sizeof(*response) ||
1559 response->version != request->resp_version) {
1560 rc = -EIO;
1561 goto out;
1562 }
1563
1564 if (response->protocol == VNIC_INFO_PROT_L2)
1565 disc = QETH_DISCIPLINE_LAYER2;
1566 else if (response->protocol == VNIC_INFO_PROT_L3)
1567 disc = QETH_DISCIPLINE_LAYER3;
1568
1569 out:
1570 kfree(response);
1571 kfree(request);
1572 if (rc)
1573 QETH_CARD_TEXT_(card, 2, "err%x", rc);
1574 return disc;
1575 }
1576
1577 /* Determine whether the device requires a specific layer discipline */
qeth_enforce_discipline(struct qeth_card * card)1578 static enum qeth_discipline_id qeth_enforce_discipline(struct qeth_card *card)
1579 {
1580 enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1581
1582 if (IS_OSM(card) || IS_OSN(card))
1583 disc = QETH_DISCIPLINE_LAYER2;
1584 else if (IS_VM_NIC(card))
1585 disc = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
1586 qeth_vm_detect_layer(card);
1587
1588 switch (disc) {
1589 case QETH_DISCIPLINE_LAYER2:
1590 QETH_CARD_TEXT(card, 3, "force l2");
1591 break;
1592 case QETH_DISCIPLINE_LAYER3:
1593 QETH_CARD_TEXT(card, 3, "force l3");
1594 break;
1595 default:
1596 QETH_CARD_TEXT(card, 3, "force no");
1597 }
1598
1599 return disc;
1600 }
1601
qeth_set_blkt_defaults(struct qeth_card * card)1602 static void qeth_set_blkt_defaults(struct qeth_card *card)
1603 {
1604 QETH_CARD_TEXT(card, 2, "cfgblkt");
1605
1606 if (card->info.use_v1_blkt) {
1607 card->info.blkt.time_total = 0;
1608 card->info.blkt.inter_packet = 0;
1609 card->info.blkt.inter_packet_jumbo = 0;
1610 } else {
1611 card->info.blkt.time_total = 250;
1612 card->info.blkt.inter_packet = 5;
1613 card->info.blkt.inter_packet_jumbo = 15;
1614 }
1615 }
1616
qeth_init_tokens(struct qeth_card * card)1617 static void qeth_init_tokens(struct qeth_card *card)
1618 {
1619 card->token.issuer_rm_w = 0x00010103UL;
1620 card->token.cm_filter_w = 0x00010108UL;
1621 card->token.cm_connection_w = 0x0001010aUL;
1622 card->token.ulp_filter_w = 0x0001010bUL;
1623 card->token.ulp_connection_w = 0x0001010dUL;
1624 }
1625
qeth_init_func_level(struct qeth_card * card)1626 static void qeth_init_func_level(struct qeth_card *card)
1627 {
1628 switch (card->info.type) {
1629 case QETH_CARD_TYPE_IQD:
1630 card->info.func_level = QETH_IDX_FUNC_LEVEL_IQD;
1631 break;
1632 case QETH_CARD_TYPE_OSD:
1633 case QETH_CARD_TYPE_OSN:
1634 card->info.func_level = QETH_IDX_FUNC_LEVEL_OSD;
1635 break;
1636 default:
1637 break;
1638 }
1639 }
1640
qeth_idx_finalize_cmd(struct qeth_card * card,struct qeth_cmd_buffer * iob)1641 static void qeth_idx_finalize_cmd(struct qeth_card *card,
1642 struct qeth_cmd_buffer *iob)
1643 {
1644 memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data), &card->seqno.trans_hdr,
1645 QETH_SEQ_NO_LENGTH);
1646 if (iob->channel == &card->write)
1647 card->seqno.trans_hdr++;
1648 }
1649
qeth_peer_func_level(int level)1650 static int qeth_peer_func_level(int level)
1651 {
1652 if ((level & 0xff) == 8)
1653 return (level & 0xff) + 0x400;
1654 if (((level >> 8) & 3) == 1)
1655 return (level & 0xff) + 0x200;
1656 return level;
1657 }
1658
qeth_mpc_finalize_cmd(struct qeth_card * card,struct qeth_cmd_buffer * iob)1659 static void qeth_mpc_finalize_cmd(struct qeth_card *card,
1660 struct qeth_cmd_buffer *iob)
1661 {
1662 qeth_idx_finalize_cmd(card, iob);
1663
1664 memcpy(QETH_PDU_HEADER_SEQ_NO(iob->data),
1665 &card->seqno.pdu_hdr, QETH_SEQ_NO_LENGTH);
1666 card->seqno.pdu_hdr++;
1667 memcpy(QETH_PDU_HEADER_ACK_SEQ_NO(iob->data),
1668 &card->seqno.pdu_hdr_ack, QETH_SEQ_NO_LENGTH);
1669
1670 iob->callback = qeth_release_buffer_cb;
1671 }
1672
qeth_mpc_alloc_cmd(struct qeth_card * card,void * data,unsigned int data_length)1673 static struct qeth_cmd_buffer *qeth_mpc_alloc_cmd(struct qeth_card *card,
1674 void *data,
1675 unsigned int data_length)
1676 {
1677 struct qeth_cmd_buffer *iob;
1678
1679 iob = qeth_alloc_cmd(&card->write, data_length, 1, QETH_TIMEOUT);
1680 if (!iob)
1681 return NULL;
1682
1683 memcpy(iob->data, data, data_length);
1684 qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, data_length,
1685 iob->data);
1686 iob->finalize = qeth_mpc_finalize_cmd;
1687 return iob;
1688 }
1689
1690 /**
1691 * qeth_send_control_data() - send control command to the card
1692 * @card: qeth_card structure pointer
1693 * @iob: qeth_cmd_buffer pointer
1694 * @reply_cb: callback function pointer
1695 * @cb_card: pointer to the qeth_card structure
1696 * @cb_reply: pointer to the qeth_reply structure
1697 * @cb_cmd: pointer to the original iob for non-IPA
1698 * commands, or to the qeth_ipa_cmd structure
1699 * for the IPA commands.
1700 * @reply_param: private pointer passed to the callback
1701 *
1702 * Callback function gets called one or more times, with cb_cmd
1703 * pointing to the response returned by the hardware. Callback
1704 * function must return
1705 * > 0 if more reply blocks are expected,
1706 * 0 if the last or only reply block is received, and
1707 * < 0 on error.
1708 * Callback function can get the value of the reply_param pointer from the
1709 * field 'param' of the structure qeth_reply.
1710 */
1711
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)1712 static int qeth_send_control_data(struct qeth_card *card,
1713 struct qeth_cmd_buffer *iob,
1714 int (*reply_cb)(struct qeth_card *cb_card,
1715 struct qeth_reply *cb_reply,
1716 unsigned long cb_cmd),
1717 void *reply_param)
1718 {
1719 struct qeth_channel *channel = iob->channel;
1720 struct qeth_reply *reply = &iob->reply;
1721 long timeout = iob->timeout;
1722 int rc;
1723
1724 QETH_CARD_TEXT(card, 2, "sendctl");
1725
1726 reply->callback = reply_cb;
1727 reply->param = reply_param;
1728
1729 timeout = wait_event_interruptible_timeout(card->wait_q,
1730 qeth_trylock_channel(channel),
1731 timeout);
1732 if (timeout <= 0) {
1733 qeth_put_cmd(iob);
1734 return (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
1735 }
1736
1737 if (iob->finalize)
1738 iob->finalize(card, iob);
1739 QETH_DBF_HEX(CTRL, 2, iob->data, min(iob->length, QETH_DBF_CTRL_LEN));
1740
1741 qeth_enqueue_cmd(card, iob);
1742
1743 /* This pairs with iob->callback, and keeps the iob alive after IO: */
1744 qeth_get_cmd(iob);
1745
1746 QETH_CARD_TEXT(card, 6, "noirqpnd");
1747 spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1748 rc = ccw_device_start_timeout(channel->ccwdev, __ccw_from_cmd(iob),
1749 (addr_t) iob, 0, 0, timeout);
1750 spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1751 if (rc) {
1752 QETH_DBF_MESSAGE(2, "qeth_send_control_data on device %x: ccw_device_start rc = %i\n",
1753 CARD_DEVID(card), rc);
1754 QETH_CARD_TEXT_(card, 2, " err%d", rc);
1755 qeth_dequeue_cmd(card, iob);
1756 qeth_put_cmd(iob);
1757 atomic_set(&channel->irq_pending, 0);
1758 wake_up(&card->wait_q);
1759 goto out;
1760 }
1761
1762 timeout = wait_for_completion_interruptible_timeout(&iob->done,
1763 timeout);
1764 if (timeout <= 0)
1765 rc = (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
1766
1767 qeth_dequeue_cmd(card, iob);
1768
1769 if (reply_cb) {
1770 /* Wait until the callback for a late reply has completed: */
1771 spin_lock_irq(&iob->lock);
1772 if (rc)
1773 /* Zap any callback that's still pending: */
1774 iob->rc = rc;
1775 spin_unlock_irq(&iob->lock);
1776 }
1777
1778 if (!rc)
1779 rc = iob->rc;
1780
1781 out:
1782 qeth_put_cmd(iob);
1783 return rc;
1784 }
1785
1786 struct qeth_node_desc {
1787 struct node_descriptor nd1;
1788 struct node_descriptor nd2;
1789 struct node_descriptor nd3;
1790 };
1791
qeth_read_conf_data_cb(struct qeth_card * card,struct qeth_cmd_buffer * iob,unsigned int data_length)1792 static void qeth_read_conf_data_cb(struct qeth_card *card,
1793 struct qeth_cmd_buffer *iob,
1794 unsigned int data_length)
1795 {
1796 struct qeth_node_desc *nd = (struct qeth_node_desc *) iob->data;
1797 int rc = 0;
1798 u8 *tag;
1799
1800 QETH_CARD_TEXT(card, 2, "cfgunit");
1801
1802 if (data_length < sizeof(*nd)) {
1803 rc = -EINVAL;
1804 goto out;
1805 }
1806
1807 card->info.is_vm_nic = nd->nd1.plant[0] == _ascebc['V'] &&
1808 nd->nd1.plant[1] == _ascebc['M'];
1809 tag = (u8 *)&nd->nd1.tag;
1810 card->info.chpid = tag[0];
1811 card->info.unit_addr2 = tag[1];
1812
1813 tag = (u8 *)&nd->nd2.tag;
1814 card->info.cula = tag[1];
1815
1816 card->info.use_v1_blkt = nd->nd3.model[0] == 0xF0 &&
1817 nd->nd3.model[1] == 0xF0 &&
1818 nd->nd3.model[2] >= 0xF1 &&
1819 nd->nd3.model[2] <= 0xF4;
1820
1821 out:
1822 qeth_notify_cmd(iob, rc);
1823 qeth_put_cmd(iob);
1824 }
1825
qeth_read_conf_data(struct qeth_card * card)1826 static int qeth_read_conf_data(struct qeth_card *card)
1827 {
1828 struct qeth_channel *channel = &card->data;
1829 struct qeth_cmd_buffer *iob;
1830 struct ciw *ciw;
1831
1832 /* scan for RCD command in extended SenseID data */
1833 ciw = ccw_device_get_ciw(channel->ccwdev, CIW_TYPE_RCD);
1834 if (!ciw || ciw->cmd == 0)
1835 return -EOPNOTSUPP;
1836 if (ciw->count < sizeof(struct qeth_node_desc))
1837 return -EINVAL;
1838
1839 iob = qeth_alloc_cmd(channel, ciw->count, 1, QETH_RCD_TIMEOUT);
1840 if (!iob)
1841 return -ENOMEM;
1842
1843 iob->callback = qeth_read_conf_data_cb;
1844 qeth_setup_ccw(__ccw_from_cmd(iob), ciw->cmd, 0, iob->length,
1845 iob->data);
1846
1847 return qeth_send_control_data(card, iob, NULL, NULL);
1848 }
1849
qeth_idx_check_activate_response(struct qeth_card * card,struct qeth_channel * channel,struct qeth_cmd_buffer * iob)1850 static int qeth_idx_check_activate_response(struct qeth_card *card,
1851 struct qeth_channel *channel,
1852 struct qeth_cmd_buffer *iob)
1853 {
1854 int rc;
1855
1856 rc = qeth_check_idx_response(card, iob->data);
1857 if (rc)
1858 return rc;
1859
1860 if (QETH_IS_IDX_ACT_POS_REPLY(iob->data))
1861 return 0;
1862
1863 /* negative reply: */
1864 QETH_CARD_TEXT_(card, 2, "idxneg%c",
1865 QETH_IDX_ACT_CAUSE_CODE(iob->data));
1866
1867 switch (QETH_IDX_ACT_CAUSE_CODE(iob->data)) {
1868 case QETH_IDX_ACT_ERR_EXCL:
1869 dev_err(&channel->ccwdev->dev,
1870 "The adapter is used exclusively by another host\n");
1871 return -EBUSY;
1872 case QETH_IDX_ACT_ERR_AUTH:
1873 case QETH_IDX_ACT_ERR_AUTH_USER:
1874 dev_err(&channel->ccwdev->dev,
1875 "Setting the device online failed because of insufficient authorization\n");
1876 return -EPERM;
1877 default:
1878 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: negative reply\n",
1879 CCW_DEVID(channel->ccwdev));
1880 return -EIO;
1881 }
1882 }
1883
qeth_idx_activate_read_channel_cb(struct qeth_card * card,struct qeth_cmd_buffer * iob,unsigned int data_length)1884 static void qeth_idx_activate_read_channel_cb(struct qeth_card *card,
1885 struct qeth_cmd_buffer *iob,
1886 unsigned int data_length)
1887 {
1888 struct qeth_channel *channel = iob->channel;
1889 u16 peer_level;
1890 int rc;
1891
1892 QETH_CARD_TEXT(card, 2, "idxrdcb");
1893
1894 rc = qeth_idx_check_activate_response(card, channel, iob);
1895 if (rc)
1896 goto out;
1897
1898 memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
1899 if (peer_level != qeth_peer_func_level(card->info.func_level)) {
1900 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
1901 CCW_DEVID(channel->ccwdev),
1902 card->info.func_level, peer_level);
1903 rc = -EINVAL;
1904 goto out;
1905 }
1906
1907 memcpy(&card->token.issuer_rm_r,
1908 QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
1909 QETH_MPC_TOKEN_LENGTH);
1910 memcpy(&card->info.mcl_level[0],
1911 QETH_IDX_REPLY_LEVEL(iob->data), QETH_MCL_LENGTH);
1912
1913 out:
1914 qeth_notify_cmd(iob, rc);
1915 qeth_put_cmd(iob);
1916 }
1917
qeth_idx_activate_write_channel_cb(struct qeth_card * card,struct qeth_cmd_buffer * iob,unsigned int data_length)1918 static void qeth_idx_activate_write_channel_cb(struct qeth_card *card,
1919 struct qeth_cmd_buffer *iob,
1920 unsigned int data_length)
1921 {
1922 struct qeth_channel *channel = iob->channel;
1923 u16 peer_level;
1924 int rc;
1925
1926 QETH_CARD_TEXT(card, 2, "idxwrcb");
1927
1928 rc = qeth_idx_check_activate_response(card, channel, iob);
1929 if (rc)
1930 goto out;
1931
1932 memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
1933 if ((peer_level & ~0x0100) !=
1934 qeth_peer_func_level(card->info.func_level)) {
1935 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
1936 CCW_DEVID(channel->ccwdev),
1937 card->info.func_level, peer_level);
1938 rc = -EINVAL;
1939 }
1940
1941 out:
1942 qeth_notify_cmd(iob, rc);
1943 qeth_put_cmd(iob);
1944 }
1945
qeth_idx_setup_activate_cmd(struct qeth_card * card,struct qeth_cmd_buffer * iob)1946 static void qeth_idx_setup_activate_cmd(struct qeth_card *card,
1947 struct qeth_cmd_buffer *iob)
1948 {
1949 u16 addr = (card->info.cula << 8) + card->info.unit_addr2;
1950 u8 port = ((u8)card->dev->dev_port) | 0x80;
1951 struct ccw1 *ccw = __ccw_from_cmd(iob);
1952 struct ccw_dev_id dev_id;
1953
1954 qeth_setup_ccw(&ccw[0], CCW_CMD_WRITE, CCW_FLAG_CC, IDX_ACTIVATE_SIZE,
1955 iob->data);
1956 qeth_setup_ccw(&ccw[1], CCW_CMD_READ, 0, iob->length, iob->data);
1957 ccw_device_get_id(CARD_DDEV(card), &dev_id);
1958 iob->finalize = qeth_idx_finalize_cmd;
1959
1960 memcpy(QETH_IDX_ACT_PNO(iob->data), &port, 1);
1961 memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
1962 &card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH);
1963 memcpy(QETH_IDX_ACT_FUNC_LEVEL(iob->data),
1964 &card->info.func_level, 2);
1965 memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &dev_id.devno, 2);
1966 memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &addr, 2);
1967 }
1968
qeth_idx_activate_read_channel(struct qeth_card * card)1969 static int qeth_idx_activate_read_channel(struct qeth_card *card)
1970 {
1971 struct qeth_channel *channel = &card->read;
1972 struct qeth_cmd_buffer *iob;
1973 int rc;
1974
1975 QETH_CARD_TEXT(card, 2, "idxread");
1976
1977 iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
1978 if (!iob)
1979 return -ENOMEM;
1980
1981 memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE);
1982 qeth_idx_setup_activate_cmd(card, iob);
1983 iob->callback = qeth_idx_activate_read_channel_cb;
1984
1985 rc = qeth_send_control_data(card, iob, NULL, NULL);
1986 if (rc)
1987 return rc;
1988
1989 channel->state = CH_STATE_UP;
1990 return 0;
1991 }
1992
qeth_idx_activate_write_channel(struct qeth_card * card)1993 static int qeth_idx_activate_write_channel(struct qeth_card *card)
1994 {
1995 struct qeth_channel *channel = &card->write;
1996 struct qeth_cmd_buffer *iob;
1997 int rc;
1998
1999 QETH_CARD_TEXT(card, 2, "idxwrite");
2000
2001 iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
2002 if (!iob)
2003 return -ENOMEM;
2004
2005 memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE);
2006 qeth_idx_setup_activate_cmd(card, iob);
2007 iob->callback = qeth_idx_activate_write_channel_cb;
2008
2009 rc = qeth_send_control_data(card, iob, NULL, NULL);
2010 if (rc)
2011 return rc;
2012
2013 channel->state = CH_STATE_UP;
2014 return 0;
2015 }
2016
qeth_cm_enable_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)2017 static int qeth_cm_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2018 unsigned long data)
2019 {
2020 struct qeth_cmd_buffer *iob;
2021
2022 QETH_CARD_TEXT(card, 2, "cmenblcb");
2023
2024 iob = (struct qeth_cmd_buffer *) data;
2025 memcpy(&card->token.cm_filter_r,
2026 QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data),
2027 QETH_MPC_TOKEN_LENGTH);
2028 return 0;
2029 }
2030
qeth_cm_enable(struct qeth_card * card)2031 static int qeth_cm_enable(struct qeth_card *card)
2032 {
2033 struct qeth_cmd_buffer *iob;
2034
2035 QETH_CARD_TEXT(card, 2, "cmenable");
2036
2037 iob = qeth_mpc_alloc_cmd(card, CM_ENABLE, CM_ENABLE_SIZE);
2038 if (!iob)
2039 return -ENOMEM;
2040
2041 memcpy(QETH_CM_ENABLE_ISSUER_RM_TOKEN(iob->data),
2042 &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2043 memcpy(QETH_CM_ENABLE_FILTER_TOKEN(iob->data),
2044 &card->token.cm_filter_w, QETH_MPC_TOKEN_LENGTH);
2045
2046 return qeth_send_control_data(card, iob, qeth_cm_enable_cb, NULL);
2047 }
2048
qeth_cm_setup_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)2049 static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2050 unsigned long data)
2051 {
2052 struct qeth_cmd_buffer *iob;
2053
2054 QETH_CARD_TEXT(card, 2, "cmsetpcb");
2055
2056 iob = (struct qeth_cmd_buffer *) data;
2057 memcpy(&card->token.cm_connection_r,
2058 QETH_CM_SETUP_RESP_DEST_ADDR(iob->data),
2059 QETH_MPC_TOKEN_LENGTH);
2060 return 0;
2061 }
2062
qeth_cm_setup(struct qeth_card * card)2063 static int qeth_cm_setup(struct qeth_card *card)
2064 {
2065 struct qeth_cmd_buffer *iob;
2066
2067 QETH_CARD_TEXT(card, 2, "cmsetup");
2068
2069 iob = qeth_mpc_alloc_cmd(card, CM_SETUP, CM_SETUP_SIZE);
2070 if (!iob)
2071 return -ENOMEM;
2072
2073 memcpy(QETH_CM_SETUP_DEST_ADDR(iob->data),
2074 &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2075 memcpy(QETH_CM_SETUP_CONNECTION_TOKEN(iob->data),
2076 &card->token.cm_connection_w, QETH_MPC_TOKEN_LENGTH);
2077 memcpy(QETH_CM_SETUP_FILTER_TOKEN(iob->data),
2078 &card->token.cm_filter_r, QETH_MPC_TOKEN_LENGTH);
2079 return qeth_send_control_data(card, iob, qeth_cm_setup_cb, NULL);
2080 }
2081
qeth_update_max_mtu(struct qeth_card * card,unsigned int max_mtu)2082 static int qeth_update_max_mtu(struct qeth_card *card, unsigned int max_mtu)
2083 {
2084 struct net_device *dev = card->dev;
2085 unsigned int new_mtu;
2086
2087 if (!max_mtu) {
2088 /* IQD needs accurate max MTU to set up its RX buffers: */
2089 if (IS_IQD(card))
2090 return -EINVAL;
2091 /* tolerate quirky HW: */
2092 max_mtu = ETH_MAX_MTU;
2093 }
2094
2095 rtnl_lock();
2096 if (IS_IQD(card)) {
2097 /* move any device with default MTU to new max MTU: */
2098 new_mtu = (dev->mtu == dev->max_mtu) ? max_mtu : dev->mtu;
2099
2100 /* adjust RX buffer size to new max MTU: */
2101 card->qdio.in_buf_size = max_mtu + 2 * PAGE_SIZE;
2102 if (dev->max_mtu && dev->max_mtu != max_mtu)
2103 qeth_free_qdio_queues(card);
2104 } else {
2105 if (dev->mtu)
2106 new_mtu = dev->mtu;
2107 /* default MTUs for first setup: */
2108 else if (IS_LAYER2(card))
2109 new_mtu = ETH_DATA_LEN;
2110 else
2111 new_mtu = ETH_DATA_LEN - 8; /* allow for LLC + SNAP */
2112 }
2113
2114 dev->max_mtu = max_mtu;
2115 dev->mtu = min(new_mtu, max_mtu);
2116 rtnl_unlock();
2117 return 0;
2118 }
2119
qeth_get_mtu_outof_framesize(int framesize)2120 static int qeth_get_mtu_outof_framesize(int framesize)
2121 {
2122 switch (framesize) {
2123 case 0x4000:
2124 return 8192;
2125 case 0x6000:
2126 return 16384;
2127 case 0xa000:
2128 return 32768;
2129 case 0xffff:
2130 return 57344;
2131 default:
2132 return 0;
2133 }
2134 }
2135
qeth_ulp_enable_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)2136 static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2137 unsigned long data)
2138 {
2139 __u16 mtu, framesize;
2140 __u16 len;
2141 __u8 link_type;
2142 struct qeth_cmd_buffer *iob;
2143
2144 QETH_CARD_TEXT(card, 2, "ulpenacb");
2145
2146 iob = (struct qeth_cmd_buffer *) data;
2147 memcpy(&card->token.ulp_filter_r,
2148 QETH_ULP_ENABLE_RESP_FILTER_TOKEN(iob->data),
2149 QETH_MPC_TOKEN_LENGTH);
2150 if (IS_IQD(card)) {
2151 memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2);
2152 mtu = qeth_get_mtu_outof_framesize(framesize);
2153 } else {
2154 mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data);
2155 }
2156 *(u16 *)reply->param = mtu;
2157
2158 memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2);
2159 if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) {
2160 memcpy(&link_type,
2161 QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1);
2162 card->info.link_type = link_type;
2163 } else
2164 card->info.link_type = 0;
2165 QETH_CARD_TEXT_(card, 2, "link%d", card->info.link_type);
2166 return 0;
2167 }
2168
qeth_mpc_select_prot_type(struct qeth_card * card)2169 static u8 qeth_mpc_select_prot_type(struct qeth_card *card)
2170 {
2171 if (IS_OSN(card))
2172 return QETH_PROT_OSN2;
2173 return IS_LAYER2(card) ? QETH_PROT_LAYER2 : QETH_PROT_TCPIP;
2174 }
2175
qeth_ulp_enable(struct qeth_card * card)2176 static int qeth_ulp_enable(struct qeth_card *card)
2177 {
2178 u8 prot_type = qeth_mpc_select_prot_type(card);
2179 struct qeth_cmd_buffer *iob;
2180 u16 max_mtu;
2181 int rc;
2182
2183 QETH_CARD_TEXT(card, 2, "ulpenabl");
2184
2185 iob = qeth_mpc_alloc_cmd(card, ULP_ENABLE, ULP_ENABLE_SIZE);
2186 if (!iob)
2187 return -ENOMEM;
2188
2189 *(QETH_ULP_ENABLE_LINKNUM(iob->data)) = (u8) card->dev->dev_port;
2190 memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1);
2191 memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data),
2192 &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2193 memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data),
2194 &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH);
2195 rc = qeth_send_control_data(card, iob, qeth_ulp_enable_cb, &max_mtu);
2196 if (rc)
2197 return rc;
2198 return qeth_update_max_mtu(card, max_mtu);
2199 }
2200
qeth_ulp_setup_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)2201 static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2202 unsigned long data)
2203 {
2204 struct qeth_cmd_buffer *iob;
2205
2206 QETH_CARD_TEXT(card, 2, "ulpstpcb");
2207
2208 iob = (struct qeth_cmd_buffer *) data;
2209 memcpy(&card->token.ulp_connection_r,
2210 QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2211 QETH_MPC_TOKEN_LENGTH);
2212 if (!strncmp("00S", QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2213 3)) {
2214 QETH_CARD_TEXT(card, 2, "olmlimit");
2215 dev_err(&card->gdev->dev, "A connection could not be "
2216 "established because of an OLM limit\n");
2217 return -EMLINK;
2218 }
2219 return 0;
2220 }
2221
qeth_ulp_setup(struct qeth_card * card)2222 static int qeth_ulp_setup(struct qeth_card *card)
2223 {
2224 __u16 temp;
2225 struct qeth_cmd_buffer *iob;
2226 struct ccw_dev_id dev_id;
2227
2228 QETH_CARD_TEXT(card, 2, "ulpsetup");
2229
2230 iob = qeth_mpc_alloc_cmd(card, ULP_SETUP, ULP_SETUP_SIZE);
2231 if (!iob)
2232 return -ENOMEM;
2233
2234 memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data),
2235 &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2236 memcpy(QETH_ULP_SETUP_CONNECTION_TOKEN(iob->data),
2237 &card->token.ulp_connection_w, QETH_MPC_TOKEN_LENGTH);
2238 memcpy(QETH_ULP_SETUP_FILTER_TOKEN(iob->data),
2239 &card->token.ulp_filter_r, QETH_MPC_TOKEN_LENGTH);
2240
2241 ccw_device_get_id(CARD_DDEV(card), &dev_id);
2242 memcpy(QETH_ULP_SETUP_CUA(iob->data), &dev_id.devno, 2);
2243 temp = (card->info.cula << 8) + card->info.unit_addr2;
2244 memcpy(QETH_ULP_SETUP_REAL_DEVADDR(iob->data), &temp, 2);
2245 return qeth_send_control_data(card, iob, qeth_ulp_setup_cb, NULL);
2246 }
2247
qeth_init_qdio_out_buf(struct qeth_qdio_out_q * q,int bidx)2248 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *q, int bidx)
2249 {
2250 struct qeth_qdio_out_buffer *newbuf;
2251
2252 newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, GFP_ATOMIC);
2253 if (!newbuf)
2254 return -ENOMEM;
2255
2256 newbuf->buffer = q->qdio_bufs[bidx];
2257 skb_queue_head_init(&newbuf->skb_list);
2258 lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key);
2259 newbuf->q = q;
2260 newbuf->next_pending = q->bufs[bidx];
2261 atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY);
2262 q->bufs[bidx] = newbuf;
2263 return 0;
2264 }
2265
qeth_free_output_queue(struct qeth_qdio_out_q * q)2266 static void qeth_free_output_queue(struct qeth_qdio_out_q *q)
2267 {
2268 if (!q)
2269 return;
2270
2271 qeth_drain_output_queue(q, true);
2272 qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2273 kfree(q);
2274 }
2275
qeth_alloc_output_queue(void)2276 static struct qeth_qdio_out_q *qeth_alloc_output_queue(void)
2277 {
2278 struct qeth_qdio_out_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
2279
2280 if (!q)
2281 return NULL;
2282
2283 if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
2284 kfree(q);
2285 return NULL;
2286 }
2287 return q;
2288 }
2289
qeth_tx_completion_timer(struct timer_list * timer)2290 static void qeth_tx_completion_timer(struct timer_list *timer)
2291 {
2292 struct qeth_qdio_out_q *queue = from_timer(queue, timer, timer);
2293
2294 napi_schedule(&queue->napi);
2295 QETH_TXQ_STAT_INC(queue, completion_timer);
2296 }
2297
qeth_alloc_qdio_queues(struct qeth_card * card)2298 static int qeth_alloc_qdio_queues(struct qeth_card *card)
2299 {
2300 int i, j;
2301
2302 QETH_CARD_TEXT(card, 2, "allcqdbf");
2303
2304 if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED,
2305 QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED)
2306 return 0;
2307
2308 QETH_CARD_TEXT(card, 2, "inq");
2309 card->qdio.in_q = qeth_alloc_qdio_queue();
2310 if (!card->qdio.in_q)
2311 goto out_nomem;
2312
2313 /* inbound buffer pool */
2314 if (qeth_alloc_buffer_pool(card))
2315 goto out_freeinq;
2316
2317 /* outbound */
2318 for (i = 0; i < card->qdio.no_out_queues; ++i) {
2319 struct qeth_qdio_out_q *queue;
2320
2321 queue = qeth_alloc_output_queue();
2322 if (!queue)
2323 goto out_freeoutq;
2324 QETH_CARD_TEXT_(card, 2, "outq %i", i);
2325 QETH_CARD_HEX(card, 2, &queue, sizeof(void *));
2326 card->qdio.out_qs[i] = queue;
2327 queue->card = card;
2328 queue->queue_no = i;
2329 timer_setup(&queue->timer, qeth_tx_completion_timer, 0);
2330
2331 /* give outbound qeth_qdio_buffers their qdio_buffers */
2332 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2333 WARN_ON(queue->bufs[j]);
2334 if (qeth_init_qdio_out_buf(queue, j))
2335 goto out_freeoutqbufs;
2336 }
2337 }
2338
2339 /* completion */
2340 if (qeth_alloc_cq(card))
2341 goto out_freeoutq;
2342
2343 return 0;
2344
2345 out_freeoutqbufs:
2346 while (j > 0) {
2347 --j;
2348 kmem_cache_free(qeth_qdio_outbuf_cache,
2349 card->qdio.out_qs[i]->bufs[j]);
2350 card->qdio.out_qs[i]->bufs[j] = NULL;
2351 }
2352 out_freeoutq:
2353 while (i > 0) {
2354 qeth_free_output_queue(card->qdio.out_qs[--i]);
2355 card->qdio.out_qs[i] = NULL;
2356 }
2357 qeth_free_buffer_pool(card);
2358 out_freeinq:
2359 qeth_free_qdio_queue(card->qdio.in_q);
2360 card->qdio.in_q = NULL;
2361 out_nomem:
2362 atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
2363 return -ENOMEM;
2364 }
2365
qeth_free_qdio_queues(struct qeth_card * card)2366 static void qeth_free_qdio_queues(struct qeth_card *card)
2367 {
2368 int i, j;
2369
2370 if (atomic_xchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED) ==
2371 QETH_QDIO_UNINITIALIZED)
2372 return;
2373
2374 qeth_free_cq(card);
2375 cancel_delayed_work_sync(&card->buffer_reclaim_work);
2376 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2377 if (card->qdio.in_q->bufs[j].rx_skb)
2378 dev_kfree_skb_any(card->qdio.in_q->bufs[j].rx_skb);
2379 }
2380 qeth_free_qdio_queue(card->qdio.in_q);
2381 card->qdio.in_q = NULL;
2382 /* inbound buffer pool */
2383 qeth_free_buffer_pool(card);
2384 /* free outbound qdio_qs */
2385 for (i = 0; i < card->qdio.no_out_queues; i++) {
2386 qeth_free_output_queue(card->qdio.out_qs[i]);
2387 card->qdio.out_qs[i] = NULL;
2388 }
2389 }
2390
qeth_create_qib_param_field(struct qeth_card * card,char * param_field)2391 static void qeth_create_qib_param_field(struct qeth_card *card,
2392 char *param_field)
2393 {
2394
2395 param_field[0] = _ascebc['P'];
2396 param_field[1] = _ascebc['C'];
2397 param_field[2] = _ascebc['I'];
2398 param_field[3] = _ascebc['T'];
2399 *((unsigned int *) (¶m_field[4])) = QETH_PCI_THRESHOLD_A(card);
2400 *((unsigned int *) (¶m_field[8])) = QETH_PCI_THRESHOLD_B(card);
2401 *((unsigned int *) (¶m_field[12])) = QETH_PCI_TIMER_VALUE(card);
2402 }
2403
qeth_create_qib_param_field_blkt(struct qeth_card * card,char * param_field)2404 static void qeth_create_qib_param_field_blkt(struct qeth_card *card,
2405 char *param_field)
2406 {
2407 param_field[16] = _ascebc['B'];
2408 param_field[17] = _ascebc['L'];
2409 param_field[18] = _ascebc['K'];
2410 param_field[19] = _ascebc['T'];
2411 *((unsigned int *) (¶m_field[20])) = card->info.blkt.time_total;
2412 *((unsigned int *) (¶m_field[24])) = card->info.blkt.inter_packet;
2413 *((unsigned int *) (¶m_field[28])) =
2414 card->info.blkt.inter_packet_jumbo;
2415 }
2416
qeth_qdio_activate(struct qeth_card * card)2417 static int qeth_qdio_activate(struct qeth_card *card)
2418 {
2419 QETH_CARD_TEXT(card, 3, "qdioact");
2420 return qdio_activate(CARD_DDEV(card));
2421 }
2422
qeth_dm_act(struct qeth_card * card)2423 static int qeth_dm_act(struct qeth_card *card)
2424 {
2425 struct qeth_cmd_buffer *iob;
2426
2427 QETH_CARD_TEXT(card, 2, "dmact");
2428
2429 iob = qeth_mpc_alloc_cmd(card, DM_ACT, DM_ACT_SIZE);
2430 if (!iob)
2431 return -ENOMEM;
2432
2433 memcpy(QETH_DM_ACT_DEST_ADDR(iob->data),
2434 &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2435 memcpy(QETH_DM_ACT_CONNECTION_TOKEN(iob->data),
2436 &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2437 return qeth_send_control_data(card, iob, NULL, NULL);
2438 }
2439
qeth_mpc_initialize(struct qeth_card * card)2440 static int qeth_mpc_initialize(struct qeth_card *card)
2441 {
2442 int rc;
2443
2444 QETH_CARD_TEXT(card, 2, "mpcinit");
2445
2446 rc = qeth_issue_next_read(card);
2447 if (rc) {
2448 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
2449 return rc;
2450 }
2451 rc = qeth_cm_enable(card);
2452 if (rc) {
2453 QETH_CARD_TEXT_(card, 2, "2err%d", rc);
2454 goto out_qdio;
2455 }
2456 rc = qeth_cm_setup(card);
2457 if (rc) {
2458 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
2459 goto out_qdio;
2460 }
2461 rc = qeth_ulp_enable(card);
2462 if (rc) {
2463 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
2464 goto out_qdio;
2465 }
2466 rc = qeth_ulp_setup(card);
2467 if (rc) {
2468 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2469 goto out_qdio;
2470 }
2471 rc = qeth_alloc_qdio_queues(card);
2472 if (rc) {
2473 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2474 goto out_qdio;
2475 }
2476 rc = qeth_qdio_establish(card);
2477 if (rc) {
2478 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
2479 qeth_free_qdio_queues(card);
2480 goto out_qdio;
2481 }
2482 rc = qeth_qdio_activate(card);
2483 if (rc) {
2484 QETH_CARD_TEXT_(card, 2, "7err%d", rc);
2485 goto out_qdio;
2486 }
2487 rc = qeth_dm_act(card);
2488 if (rc) {
2489 QETH_CARD_TEXT_(card, 2, "8err%d", rc);
2490 goto out_qdio;
2491 }
2492
2493 return 0;
2494 out_qdio:
2495 qeth_qdio_clear_card(card, !IS_IQD(card));
2496 qdio_free(CARD_DDEV(card));
2497 return rc;
2498 }
2499
qeth_print_status_message(struct qeth_card * card)2500 void qeth_print_status_message(struct qeth_card *card)
2501 {
2502 switch (card->info.type) {
2503 case QETH_CARD_TYPE_OSD:
2504 case QETH_CARD_TYPE_OSM:
2505 case QETH_CARD_TYPE_OSX:
2506 /* VM will use a non-zero first character
2507 * to indicate a HiperSockets like reporting
2508 * of the level OSA sets the first character to zero
2509 * */
2510 if (!card->info.mcl_level[0]) {
2511 sprintf(card->info.mcl_level, "%02x%02x",
2512 card->info.mcl_level[2],
2513 card->info.mcl_level[3]);
2514 break;
2515 }
2516 /* fallthrough */
2517 case QETH_CARD_TYPE_IQD:
2518 if (IS_VM_NIC(card) || (card->info.mcl_level[0] & 0x80)) {
2519 card->info.mcl_level[0] = (char) _ebcasc[(__u8)
2520 card->info.mcl_level[0]];
2521 card->info.mcl_level[1] = (char) _ebcasc[(__u8)
2522 card->info.mcl_level[1]];
2523 card->info.mcl_level[2] = (char) _ebcasc[(__u8)
2524 card->info.mcl_level[2]];
2525 card->info.mcl_level[3] = (char) _ebcasc[(__u8)
2526 card->info.mcl_level[3]];
2527 card->info.mcl_level[QETH_MCL_LENGTH] = 0;
2528 }
2529 break;
2530 default:
2531 memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1);
2532 }
2533 dev_info(&card->gdev->dev,
2534 "Device is a%s card%s%s%s\nwith link type %s.\n",
2535 qeth_get_cardname(card),
2536 (card->info.mcl_level[0]) ? " (level: " : "",
2537 (card->info.mcl_level[0]) ? card->info.mcl_level : "",
2538 (card->info.mcl_level[0]) ? ")" : "",
2539 qeth_get_cardname_short(card));
2540 }
2541 EXPORT_SYMBOL_GPL(qeth_print_status_message);
2542
qeth_initialize_working_pool_list(struct qeth_card * card)2543 static void qeth_initialize_working_pool_list(struct qeth_card *card)
2544 {
2545 struct qeth_buffer_pool_entry *entry;
2546
2547 QETH_CARD_TEXT(card, 5, "inwrklst");
2548
2549 list_for_each_entry(entry,
2550 &card->qdio.init_pool.entry_list, init_list) {
2551 qeth_put_buffer_pool_entry(card, entry);
2552 }
2553 }
2554
qeth_find_free_buffer_pool_entry(struct qeth_card * card)2555 static struct qeth_buffer_pool_entry *qeth_find_free_buffer_pool_entry(
2556 struct qeth_card *card)
2557 {
2558 struct list_head *plh;
2559 struct qeth_buffer_pool_entry *entry;
2560 int i, free;
2561 struct page *page;
2562
2563 if (list_empty(&card->qdio.in_buf_pool.entry_list))
2564 return NULL;
2565
2566 list_for_each(plh, &card->qdio.in_buf_pool.entry_list) {
2567 entry = list_entry(plh, struct qeth_buffer_pool_entry, list);
2568 free = 1;
2569 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2570 if (page_count(virt_to_page(entry->elements[i])) > 1) {
2571 free = 0;
2572 break;
2573 }
2574 }
2575 if (free) {
2576 list_del_init(&entry->list);
2577 return entry;
2578 }
2579 }
2580
2581 /* no free buffer in pool so take first one and swap pages */
2582 entry = list_entry(card->qdio.in_buf_pool.entry_list.next,
2583 struct qeth_buffer_pool_entry, list);
2584 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2585 if (page_count(virt_to_page(entry->elements[i])) > 1) {
2586 page = alloc_page(GFP_ATOMIC);
2587 if (!page) {
2588 return NULL;
2589 } else {
2590 free_page((unsigned long)entry->elements[i]);
2591 entry->elements[i] = page_address(page);
2592 QETH_CARD_STAT_INC(card, rx_sg_alloc_page);
2593 }
2594 }
2595 }
2596 list_del_init(&entry->list);
2597 return entry;
2598 }
2599
qeth_init_input_buffer(struct qeth_card * card,struct qeth_qdio_buffer * buf)2600 static int qeth_init_input_buffer(struct qeth_card *card,
2601 struct qeth_qdio_buffer *buf)
2602 {
2603 struct qeth_buffer_pool_entry *pool_entry;
2604 int i;
2605
2606 if ((card->options.cq == QETH_CQ_ENABLED) && (!buf->rx_skb)) {
2607 buf->rx_skb = netdev_alloc_skb(card->dev,
2608 QETH_RX_PULL_LEN + ETH_HLEN);
2609 if (!buf->rx_skb)
2610 return 1;
2611 }
2612
2613 pool_entry = qeth_find_free_buffer_pool_entry(card);
2614 if (!pool_entry)
2615 return 1;
2616
2617 /*
2618 * since the buffer is accessed only from the input_tasklet
2619 * there shouldn't be a need to synchronize; also, since we use
2620 * the QETH_IN_BUF_REQUEUE_THRESHOLD we should never run out off
2621 * buffers
2622 */
2623
2624 buf->pool_entry = pool_entry;
2625 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2626 buf->buffer->element[i].length = PAGE_SIZE;
2627 buf->buffer->element[i].addr = pool_entry->elements[i];
2628 if (i == QETH_MAX_BUFFER_ELEMENTS(card) - 1)
2629 buf->buffer->element[i].eflags = SBAL_EFLAGS_LAST_ENTRY;
2630 else
2631 buf->buffer->element[i].eflags = 0;
2632 buf->buffer->element[i].sflags = 0;
2633 }
2634 return 0;
2635 }
2636
qeth_init_qdio_queues(struct qeth_card * card)2637 int qeth_init_qdio_queues(struct qeth_card *card)
2638 {
2639 unsigned int i;
2640 int rc;
2641
2642 QETH_CARD_TEXT(card, 2, "initqdqs");
2643
2644 /* inbound queue */
2645 qdio_reset_buffers(card->qdio.in_q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2646 memset(&card->rx, 0, sizeof(struct qeth_rx));
2647 qeth_initialize_working_pool_list(card);
2648 /*give only as many buffers to hardware as we have buffer pool entries*/
2649 for (i = 0; i < card->qdio.in_buf_pool.buf_count - 1; ++i)
2650 qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]);
2651 card->qdio.in_q->next_buf_to_init =
2652 card->qdio.in_buf_pool.buf_count - 1;
2653 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0, 0,
2654 card->qdio.in_buf_pool.buf_count - 1);
2655 if (rc) {
2656 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
2657 return rc;
2658 }
2659
2660 /* completion */
2661 rc = qeth_cq_init(card);
2662 if (rc) {
2663 return rc;
2664 }
2665
2666 /* outbound queue */
2667 for (i = 0; i < card->qdio.no_out_queues; ++i) {
2668 struct qeth_qdio_out_q *queue = card->qdio.out_qs[i];
2669
2670 qdio_reset_buffers(queue->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2671 queue->max_elements = QETH_MAX_BUFFER_ELEMENTS(card);
2672 queue->next_buf_to_fill = 0;
2673 queue->do_pack = 0;
2674 queue->prev_hdr = NULL;
2675 queue->bulk_start = 0;
2676 atomic_set(&queue->used_buffers, 0);
2677 atomic_set(&queue->set_pci_flags_count, 0);
2678 atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
2679 netdev_tx_reset_queue(netdev_get_tx_queue(card->dev, i));
2680 }
2681 return 0;
2682 }
2683 EXPORT_SYMBOL_GPL(qeth_init_qdio_queues);
2684
qeth_ipa_finalize_cmd(struct qeth_card * card,struct qeth_cmd_buffer * iob)2685 static void qeth_ipa_finalize_cmd(struct qeth_card *card,
2686 struct qeth_cmd_buffer *iob)
2687 {
2688 qeth_mpc_finalize_cmd(card, iob);
2689
2690 /* override with IPA-specific values: */
2691 __ipa_cmd(iob)->hdr.seqno = card->seqno.ipa++;
2692 }
2693
qeth_prepare_ipa_cmd(struct qeth_card * card,struct qeth_cmd_buffer * iob,u16 cmd_length)2694 void qeth_prepare_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
2695 u16 cmd_length)
2696 {
2697 u8 prot_type = qeth_mpc_select_prot_type(card);
2698 u16 total_length = iob->length;
2699
2700 qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, total_length,
2701 iob->data);
2702 iob->finalize = qeth_ipa_finalize_cmd;
2703
2704 memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
2705 memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &total_length, 2);
2706 memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1);
2707 memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &cmd_length, 2);
2708 memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &cmd_length, 2);
2709 memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
2710 &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2711 memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &cmd_length, 2);
2712 }
2713 EXPORT_SYMBOL_GPL(qeth_prepare_ipa_cmd);
2714
qeth_ipa_alloc_cmd(struct qeth_card * card,enum qeth_ipa_cmds cmd_code,enum qeth_prot_versions prot,unsigned int data_length)2715 struct qeth_cmd_buffer *qeth_ipa_alloc_cmd(struct qeth_card *card,
2716 enum qeth_ipa_cmds cmd_code,
2717 enum qeth_prot_versions prot,
2718 unsigned int data_length)
2719 {
2720 enum qeth_link_types link_type = card->info.link_type;
2721 struct qeth_cmd_buffer *iob;
2722 struct qeth_ipacmd_hdr *hdr;
2723
2724 data_length += offsetof(struct qeth_ipa_cmd, data);
2725 iob = qeth_alloc_cmd(&card->write, IPA_PDU_HEADER_SIZE + data_length, 1,
2726 QETH_IPA_TIMEOUT);
2727 if (!iob)
2728 return NULL;
2729
2730 qeth_prepare_ipa_cmd(card, iob, data_length);
2731
2732 hdr = &__ipa_cmd(iob)->hdr;
2733 hdr->command = cmd_code;
2734 hdr->initiator = IPA_CMD_INITIATOR_HOST;
2735 /* hdr->seqno is set by qeth_send_control_data() */
2736 hdr->adapter_type = (link_type == QETH_LINK_TYPE_HSTR) ? 2 : 1;
2737 hdr->rel_adapter_no = (u8) card->dev->dev_port;
2738 hdr->prim_version_no = IS_LAYER2(card) ? 2 : 1;
2739 hdr->param_count = 1;
2740 hdr->prot_version = prot;
2741 return iob;
2742 }
2743 EXPORT_SYMBOL_GPL(qeth_ipa_alloc_cmd);
2744
qeth_send_ipa_cmd_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)2745 static int qeth_send_ipa_cmd_cb(struct qeth_card *card,
2746 struct qeth_reply *reply, unsigned long data)
2747 {
2748 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2749
2750 return (cmd->hdr.return_code) ? -EIO : 0;
2751 }
2752
2753 /**
2754 * qeth_send_ipa_cmd() - send an IPA command
2755 *
2756 * See qeth_send_control_data() for explanation of the arguments.
2757 */
2758
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)2759 int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
2760 int (*reply_cb)(struct qeth_card *, struct qeth_reply*,
2761 unsigned long),
2762 void *reply_param)
2763 {
2764 int rc;
2765
2766 QETH_CARD_TEXT(card, 4, "sendipa");
2767
2768 if (card->read_or_write_problem) {
2769 qeth_put_cmd(iob);
2770 return -EIO;
2771 }
2772
2773 if (reply_cb == NULL)
2774 reply_cb = qeth_send_ipa_cmd_cb;
2775 rc = qeth_send_control_data(card, iob, reply_cb, reply_param);
2776 if (rc == -ETIME) {
2777 qeth_clear_ipacmd_list(card);
2778 qeth_schedule_recovery(card);
2779 }
2780 return rc;
2781 }
2782 EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd);
2783
qeth_send_startlan_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)2784 static int qeth_send_startlan_cb(struct qeth_card *card,
2785 struct qeth_reply *reply, unsigned long data)
2786 {
2787 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2788
2789 if (cmd->hdr.return_code == IPA_RC_LAN_OFFLINE)
2790 return -ENETDOWN;
2791
2792 return (cmd->hdr.return_code) ? -EIO : 0;
2793 }
2794
qeth_send_startlan(struct qeth_card * card)2795 static int qeth_send_startlan(struct qeth_card *card)
2796 {
2797 struct qeth_cmd_buffer *iob;
2798
2799 QETH_CARD_TEXT(card, 2, "strtlan");
2800
2801 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_STARTLAN, QETH_PROT_NONE, 0);
2802 if (!iob)
2803 return -ENOMEM;
2804 return qeth_send_ipa_cmd(card, iob, qeth_send_startlan_cb, NULL);
2805 }
2806
qeth_setadpparms_inspect_rc(struct qeth_ipa_cmd * cmd)2807 static int qeth_setadpparms_inspect_rc(struct qeth_ipa_cmd *cmd)
2808 {
2809 if (!cmd->hdr.return_code)
2810 cmd->hdr.return_code =
2811 cmd->data.setadapterparms.hdr.return_code;
2812 return cmd->hdr.return_code;
2813 }
2814
qeth_query_setadapterparms_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)2815 static int qeth_query_setadapterparms_cb(struct qeth_card *card,
2816 struct qeth_reply *reply, unsigned long data)
2817 {
2818 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2819
2820 QETH_CARD_TEXT(card, 3, "quyadpcb");
2821 if (qeth_setadpparms_inspect_rc(cmd))
2822 return -EIO;
2823
2824 if (cmd->data.setadapterparms.data.query_cmds_supp.lan_type & 0x7f) {
2825 card->info.link_type =
2826 cmd->data.setadapterparms.data.query_cmds_supp.lan_type;
2827 QETH_CARD_TEXT_(card, 2, "lnk %d", card->info.link_type);
2828 }
2829 card->options.adp.supported_funcs =
2830 cmd->data.setadapterparms.data.query_cmds_supp.supported_cmds;
2831 return 0;
2832 }
2833
qeth_get_adapter_cmd(struct qeth_card * card,enum qeth_ipa_setadp_cmd adp_cmd,unsigned int data_length)2834 static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card,
2835 enum qeth_ipa_setadp_cmd adp_cmd,
2836 unsigned int data_length)
2837 {
2838 struct qeth_ipacmd_setadpparms_hdr *hdr;
2839 struct qeth_cmd_buffer *iob;
2840
2841 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETADAPTERPARMS, QETH_PROT_IPV4,
2842 data_length +
2843 offsetof(struct qeth_ipacmd_setadpparms,
2844 data));
2845 if (!iob)
2846 return NULL;
2847
2848 hdr = &__ipa_cmd(iob)->data.setadapterparms.hdr;
2849 hdr->cmdlength = sizeof(*hdr) + data_length;
2850 hdr->command_code = adp_cmd;
2851 hdr->used_total = 1;
2852 hdr->seq_no = 1;
2853 return iob;
2854 }
2855
qeth_query_setadapterparms(struct qeth_card * card)2856 static int qeth_query_setadapterparms(struct qeth_card *card)
2857 {
2858 int rc;
2859 struct qeth_cmd_buffer *iob;
2860
2861 QETH_CARD_TEXT(card, 3, "queryadp");
2862 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_COMMANDS_SUPPORTED,
2863 SETADP_DATA_SIZEOF(query_cmds_supp));
2864 if (!iob)
2865 return -ENOMEM;
2866 rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL);
2867 return rc;
2868 }
2869
qeth_query_ipassists_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)2870 static int qeth_query_ipassists_cb(struct qeth_card *card,
2871 struct qeth_reply *reply, unsigned long data)
2872 {
2873 struct qeth_ipa_cmd *cmd;
2874
2875 QETH_CARD_TEXT(card, 2, "qipasscb");
2876
2877 cmd = (struct qeth_ipa_cmd *) data;
2878
2879 switch (cmd->hdr.return_code) {
2880 case IPA_RC_SUCCESS:
2881 break;
2882 case IPA_RC_NOTSUPP:
2883 case IPA_RC_L2_UNSUPPORTED_CMD:
2884 QETH_CARD_TEXT(card, 2, "ipaunsup");
2885 card->options.ipa4.supported_funcs |= IPA_SETADAPTERPARMS;
2886 card->options.ipa6.supported_funcs |= IPA_SETADAPTERPARMS;
2887 return -EOPNOTSUPP;
2888 default:
2889 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Unhandled rc=%#x\n",
2890 CARD_DEVID(card), cmd->hdr.return_code);
2891 return -EIO;
2892 }
2893
2894 if (cmd->hdr.prot_version == QETH_PROT_IPV4) {
2895 card->options.ipa4.supported_funcs = cmd->hdr.ipa_supported;
2896 card->options.ipa4.enabled_funcs = cmd->hdr.ipa_enabled;
2897 } else if (cmd->hdr.prot_version == QETH_PROT_IPV6) {
2898 card->options.ipa6.supported_funcs = cmd->hdr.ipa_supported;
2899 card->options.ipa6.enabled_funcs = cmd->hdr.ipa_enabled;
2900 } else
2901 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Flawed LIC detected\n",
2902 CARD_DEVID(card));
2903 return 0;
2904 }
2905
qeth_query_ipassists(struct qeth_card * card,enum qeth_prot_versions prot)2906 static int qeth_query_ipassists(struct qeth_card *card,
2907 enum qeth_prot_versions prot)
2908 {
2909 int rc;
2910 struct qeth_cmd_buffer *iob;
2911
2912 QETH_CARD_TEXT_(card, 2, "qipassi%i", prot);
2913 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_QIPASSIST, prot, 0);
2914 if (!iob)
2915 return -ENOMEM;
2916 rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL);
2917 return rc;
2918 }
2919
qeth_query_switch_attributes_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)2920 static int qeth_query_switch_attributes_cb(struct qeth_card *card,
2921 struct qeth_reply *reply, unsigned long data)
2922 {
2923 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2924 struct qeth_query_switch_attributes *attrs;
2925 struct qeth_switch_info *sw_info;
2926
2927 QETH_CARD_TEXT(card, 2, "qswiatcb");
2928 if (qeth_setadpparms_inspect_rc(cmd))
2929 return -EIO;
2930
2931 sw_info = (struct qeth_switch_info *)reply->param;
2932 attrs = &cmd->data.setadapterparms.data.query_switch_attributes;
2933 sw_info->capabilities = attrs->capabilities;
2934 sw_info->settings = attrs->settings;
2935 QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities,
2936 sw_info->settings);
2937 return 0;
2938 }
2939
qeth_query_switch_attributes(struct qeth_card * card,struct qeth_switch_info * sw_info)2940 int qeth_query_switch_attributes(struct qeth_card *card,
2941 struct qeth_switch_info *sw_info)
2942 {
2943 struct qeth_cmd_buffer *iob;
2944
2945 QETH_CARD_TEXT(card, 2, "qswiattr");
2946 if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES))
2947 return -EOPNOTSUPP;
2948 if (!netif_carrier_ok(card->dev))
2949 return -ENOMEDIUM;
2950 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES, 0);
2951 if (!iob)
2952 return -ENOMEM;
2953 return qeth_send_ipa_cmd(card, iob,
2954 qeth_query_switch_attributes_cb, sw_info);
2955 }
2956
qeth_get_diag_cmd(struct qeth_card * card,enum qeth_diags_cmds sub_cmd,unsigned int data_length)2957 struct qeth_cmd_buffer *qeth_get_diag_cmd(struct qeth_card *card,
2958 enum qeth_diags_cmds sub_cmd,
2959 unsigned int data_length)
2960 {
2961 struct qeth_ipacmd_diagass *cmd;
2962 struct qeth_cmd_buffer *iob;
2963
2964 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SET_DIAG_ASS, QETH_PROT_NONE,
2965 DIAG_HDR_LEN + data_length);
2966 if (!iob)
2967 return NULL;
2968
2969 cmd = &__ipa_cmd(iob)->data.diagass;
2970 cmd->subcmd_len = DIAG_SUB_HDR_LEN + data_length;
2971 cmd->subcmd = sub_cmd;
2972 return iob;
2973 }
2974 EXPORT_SYMBOL_GPL(qeth_get_diag_cmd);
2975
qeth_query_setdiagass_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)2976 static int qeth_query_setdiagass_cb(struct qeth_card *card,
2977 struct qeth_reply *reply, unsigned long data)
2978 {
2979 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2980 u16 rc = cmd->hdr.return_code;
2981
2982 if (rc) {
2983 QETH_CARD_TEXT_(card, 2, "diagq:%x", rc);
2984 return -EIO;
2985 }
2986
2987 card->info.diagass_support = cmd->data.diagass.ext;
2988 return 0;
2989 }
2990
qeth_query_setdiagass(struct qeth_card * card)2991 static int qeth_query_setdiagass(struct qeth_card *card)
2992 {
2993 struct qeth_cmd_buffer *iob;
2994
2995 QETH_CARD_TEXT(card, 2, "qdiagass");
2996 iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_QUERY, 0);
2997 if (!iob)
2998 return -ENOMEM;
2999 return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL);
3000 }
3001
qeth_get_trap_id(struct qeth_card * card,struct qeth_trap_id * tid)3002 static void qeth_get_trap_id(struct qeth_card *card, struct qeth_trap_id *tid)
3003 {
3004 unsigned long info = get_zeroed_page(GFP_KERNEL);
3005 struct sysinfo_2_2_2 *info222 = (struct sysinfo_2_2_2 *)info;
3006 struct sysinfo_3_2_2 *info322 = (struct sysinfo_3_2_2 *)info;
3007 struct ccw_dev_id ccwid;
3008 int level;
3009
3010 tid->chpid = card->info.chpid;
3011 ccw_device_get_id(CARD_RDEV(card), &ccwid);
3012 tid->ssid = ccwid.ssid;
3013 tid->devno = ccwid.devno;
3014 if (!info)
3015 return;
3016 level = stsi(NULL, 0, 0, 0);
3017 if ((level >= 2) && (stsi(info222, 2, 2, 2) == 0))
3018 tid->lparnr = info222->lpar_number;
3019 if ((level >= 3) && (stsi(info322, 3, 2, 2) == 0)) {
3020 EBCASC(info322->vm[0].name, sizeof(info322->vm[0].name));
3021 memcpy(tid->vmname, info322->vm[0].name, sizeof(tid->vmname));
3022 }
3023 free_page(info);
3024 return;
3025 }
3026
qeth_hw_trap_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)3027 static int qeth_hw_trap_cb(struct qeth_card *card,
3028 struct qeth_reply *reply, unsigned long data)
3029 {
3030 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3031 u16 rc = cmd->hdr.return_code;
3032
3033 if (rc) {
3034 QETH_CARD_TEXT_(card, 2, "trapc:%x", rc);
3035 return -EIO;
3036 }
3037 return 0;
3038 }
3039
qeth_hw_trap(struct qeth_card * card,enum qeth_diags_trap_action action)3040 int qeth_hw_trap(struct qeth_card *card, enum qeth_diags_trap_action action)
3041 {
3042 struct qeth_cmd_buffer *iob;
3043 struct qeth_ipa_cmd *cmd;
3044
3045 QETH_CARD_TEXT(card, 2, "diagtrap");
3046 iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_TRAP, 64);
3047 if (!iob)
3048 return -ENOMEM;
3049 cmd = __ipa_cmd(iob);
3050 cmd->data.diagass.type = 1;
3051 cmd->data.diagass.action = action;
3052 switch (action) {
3053 case QETH_DIAGS_TRAP_ARM:
3054 cmd->data.diagass.options = 0x0003;
3055 cmd->data.diagass.ext = 0x00010000 +
3056 sizeof(struct qeth_trap_id);
3057 qeth_get_trap_id(card,
3058 (struct qeth_trap_id *)cmd->data.diagass.cdata);
3059 break;
3060 case QETH_DIAGS_TRAP_DISARM:
3061 cmd->data.diagass.options = 0x0001;
3062 break;
3063 case QETH_DIAGS_TRAP_CAPTURE:
3064 break;
3065 }
3066 return qeth_send_ipa_cmd(card, iob, qeth_hw_trap_cb, NULL);
3067 }
3068 EXPORT_SYMBOL_GPL(qeth_hw_trap);
3069
qeth_check_qdio_errors(struct qeth_card * card,struct qdio_buffer * buf,unsigned int qdio_error,const char * dbftext)3070 static int qeth_check_qdio_errors(struct qeth_card *card,
3071 struct qdio_buffer *buf,
3072 unsigned int qdio_error,
3073 const char *dbftext)
3074 {
3075 if (qdio_error) {
3076 QETH_CARD_TEXT(card, 2, dbftext);
3077 QETH_CARD_TEXT_(card, 2, " F15=%02X",
3078 buf->element[15].sflags);
3079 QETH_CARD_TEXT_(card, 2, " F14=%02X",
3080 buf->element[14].sflags);
3081 QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error);
3082 if ((buf->element[15].sflags) == 0x12) {
3083 QETH_CARD_STAT_INC(card, rx_dropped);
3084 return 0;
3085 } else
3086 return 1;
3087 }
3088 return 0;
3089 }
3090
qeth_queue_input_buffer(struct qeth_card * card,int index)3091 static void qeth_queue_input_buffer(struct qeth_card *card, int index)
3092 {
3093 struct qeth_qdio_q *queue = card->qdio.in_q;
3094 struct list_head *lh;
3095 int count;
3096 int i;
3097 int rc;
3098 int newcount = 0;
3099
3100 count = (index < queue->next_buf_to_init)?
3101 card->qdio.in_buf_pool.buf_count -
3102 (queue->next_buf_to_init - index) :
3103 card->qdio.in_buf_pool.buf_count -
3104 (queue->next_buf_to_init + QDIO_MAX_BUFFERS_PER_Q - index);
3105 /* only requeue at a certain threshold to avoid SIGAs */
3106 if (count >= QETH_IN_BUF_REQUEUE_THRESHOLD(card)) {
3107 for (i = queue->next_buf_to_init;
3108 i < queue->next_buf_to_init + count; ++i) {
3109 if (qeth_init_input_buffer(card,
3110 &queue->bufs[i % QDIO_MAX_BUFFERS_PER_Q])) {
3111 break;
3112 } else {
3113 newcount++;
3114 }
3115 }
3116
3117 if (newcount < count) {
3118 /* we are in memory shortage so we switch back to
3119 traditional skb allocation and drop packages */
3120 atomic_set(&card->force_alloc_skb, 3);
3121 count = newcount;
3122 } else {
3123 atomic_add_unless(&card->force_alloc_skb, -1, 0);
3124 }
3125
3126 if (!count) {
3127 i = 0;
3128 list_for_each(lh, &card->qdio.in_buf_pool.entry_list)
3129 i++;
3130 if (i == card->qdio.in_buf_pool.buf_count) {
3131 QETH_CARD_TEXT(card, 2, "qsarbw");
3132 card->reclaim_index = index;
3133 schedule_delayed_work(
3134 &card->buffer_reclaim_work,
3135 QETH_RECLAIM_WORK_TIME);
3136 }
3137 return;
3138 }
3139
3140 /*
3141 * according to old code it should be avoided to requeue all
3142 * 128 buffers in order to benefit from PCI avoidance.
3143 * this function keeps at least one buffer (the buffer at
3144 * 'index') un-requeued -> this buffer is the first buffer that
3145 * will be requeued the next time
3146 */
3147 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0,
3148 queue->next_buf_to_init, count);
3149 if (rc) {
3150 QETH_CARD_TEXT(card, 2, "qinberr");
3151 }
3152 queue->next_buf_to_init = (queue->next_buf_to_init + count) %
3153 QDIO_MAX_BUFFERS_PER_Q;
3154 }
3155 }
3156
qeth_buffer_reclaim_work(struct work_struct * work)3157 static void qeth_buffer_reclaim_work(struct work_struct *work)
3158 {
3159 struct qeth_card *card = container_of(work, struct qeth_card,
3160 buffer_reclaim_work.work);
3161
3162 QETH_CARD_TEXT_(card, 2, "brw:%x", card->reclaim_index);
3163 qeth_queue_input_buffer(card, card->reclaim_index);
3164 }
3165
qeth_handle_send_error(struct qeth_card * card,struct qeth_qdio_out_buffer * buffer,unsigned int qdio_err)3166 static void qeth_handle_send_error(struct qeth_card *card,
3167 struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err)
3168 {
3169 int sbalf15 = buffer->buffer->element[15].sflags;
3170
3171 QETH_CARD_TEXT(card, 6, "hdsnderr");
3172 qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr");
3173
3174 if (!qdio_err)
3175 return;
3176
3177 if ((sbalf15 >= 15) && (sbalf15 <= 31))
3178 return;
3179
3180 QETH_CARD_TEXT(card, 1, "lnkfail");
3181 QETH_CARD_TEXT_(card, 1, "%04x %02x",
3182 (u16)qdio_err, (u8)sbalf15);
3183 }
3184
3185 /**
3186 * qeth_prep_flush_pack_buffer - Prepares flushing of a packing buffer.
3187 * @queue: queue to check for packing buffer
3188 *
3189 * Returns number of buffers that were prepared for flush.
3190 */
qeth_prep_flush_pack_buffer(struct qeth_qdio_out_q * queue)3191 static int qeth_prep_flush_pack_buffer(struct qeth_qdio_out_q *queue)
3192 {
3193 struct qeth_qdio_out_buffer *buffer;
3194
3195 buffer = queue->bufs[queue->next_buf_to_fill];
3196 if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) &&
3197 (buffer->next_element_to_fill > 0)) {
3198 /* it's a packing buffer */
3199 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3200 queue->next_buf_to_fill =
3201 (queue->next_buf_to_fill + 1) % QDIO_MAX_BUFFERS_PER_Q;
3202 return 1;
3203 }
3204 return 0;
3205 }
3206
3207 /*
3208 * Switched to packing state if the number of used buffers on a queue
3209 * reaches a certain limit.
3210 */
qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q * queue)3211 static void qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q *queue)
3212 {
3213 if (!queue->do_pack) {
3214 if (atomic_read(&queue->used_buffers)
3215 >= QETH_HIGH_WATERMARK_PACK){
3216 /* switch non-PACKING -> PACKING */
3217 QETH_CARD_TEXT(queue->card, 6, "np->pack");
3218 QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3219 queue->do_pack = 1;
3220 }
3221 }
3222 }
3223
3224 /*
3225 * Switches from packing to non-packing mode. If there is a packing
3226 * buffer on the queue this buffer will be prepared to be flushed.
3227 * In that case 1 is returned to inform the caller. If no buffer
3228 * has to be flushed, zero is returned.
3229 */
qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q * queue)3230 static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue)
3231 {
3232 if (queue->do_pack) {
3233 if (atomic_read(&queue->used_buffers)
3234 <= QETH_LOW_WATERMARK_PACK) {
3235 /* switch PACKING -> non-PACKING */
3236 QETH_CARD_TEXT(queue->card, 6, "pack->np");
3237 QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3238 queue->do_pack = 0;
3239 return qeth_prep_flush_pack_buffer(queue);
3240 }
3241 }
3242 return 0;
3243 }
3244
qeth_flush_buffers(struct qeth_qdio_out_q * queue,int index,int count)3245 static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
3246 int count)
3247 {
3248 struct qeth_card *card = queue->card;
3249 struct qeth_qdio_out_buffer *buf;
3250 int rc;
3251 int i;
3252 unsigned int qdio_flags;
3253
3254 for (i = index; i < index + count; ++i) {
3255 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3256 buf = queue->bufs[bidx];
3257 buf->buffer->element[buf->next_element_to_fill - 1].eflags |=
3258 SBAL_EFLAGS_LAST_ENTRY;
3259
3260 if (queue->bufstates)
3261 queue->bufstates[bidx].user = buf;
3262
3263 if (IS_IQD(queue->card))
3264 continue;
3265
3266 if (!queue->do_pack) {
3267 if ((atomic_read(&queue->used_buffers) >=
3268 (QETH_HIGH_WATERMARK_PACK -
3269 QETH_WATERMARK_PACK_FUZZ)) &&
3270 !atomic_read(&queue->set_pci_flags_count)) {
3271 /* it's likely that we'll go to packing
3272 * mode soon */
3273 atomic_inc(&queue->set_pci_flags_count);
3274 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3275 }
3276 } else {
3277 if (!atomic_read(&queue->set_pci_flags_count)) {
3278 /*
3279 * there's no outstanding PCI any more, so we
3280 * have to request a PCI to be sure the the PCI
3281 * will wake at some time in the future then we
3282 * can flush packed buffers that might still be
3283 * hanging around, which can happen if no
3284 * further send was requested by the stack
3285 */
3286 atomic_inc(&queue->set_pci_flags_count);
3287 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3288 }
3289 }
3290 }
3291
3292 qdio_flags = QDIO_FLAG_SYNC_OUTPUT;
3293 if (atomic_read(&queue->set_pci_flags_count))
3294 qdio_flags |= QDIO_FLAG_PCI_OUT;
3295 rc = do_QDIO(CARD_DDEV(queue->card), qdio_flags,
3296 queue->queue_no, index, count);
3297
3298 /* Fake the TX completion interrupt: */
3299 if (IS_IQD(card))
3300 napi_schedule(&queue->napi);
3301
3302 if (rc) {
3303 /* ignore temporary SIGA errors without busy condition */
3304 if (rc == -ENOBUFS)
3305 return;
3306 QETH_CARD_TEXT(queue->card, 2, "flushbuf");
3307 QETH_CARD_TEXT_(queue->card, 2, " q%d", queue->queue_no);
3308 QETH_CARD_TEXT_(queue->card, 2, " idx%d", index);
3309 QETH_CARD_TEXT_(queue->card, 2, " c%d", count);
3310 QETH_CARD_TEXT_(queue->card, 2, " err%d", rc);
3311
3312 /* this must not happen under normal circumstances. if it
3313 * happens something is really wrong -> recover */
3314 qeth_schedule_recovery(queue->card);
3315 return;
3316 }
3317 }
3318
qeth_flush_queue(struct qeth_qdio_out_q * queue)3319 static void qeth_flush_queue(struct qeth_qdio_out_q *queue)
3320 {
3321 qeth_flush_buffers(queue, queue->bulk_start, 1);
3322
3323 queue->bulk_start = QDIO_BUFNR(queue->bulk_start + 1);
3324 queue->prev_hdr = NULL;
3325 }
3326
qeth_check_outbound_queue(struct qeth_qdio_out_q * queue)3327 static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue)
3328 {
3329 int index;
3330 int flush_cnt = 0;
3331 int q_was_packing = 0;
3332
3333 /*
3334 * check if weed have to switch to non-packing mode or if
3335 * we have to get a pci flag out on the queue
3336 */
3337 if ((atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) ||
3338 !atomic_read(&queue->set_pci_flags_count)) {
3339 if (atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH) ==
3340 QETH_OUT_Q_UNLOCKED) {
3341 /*
3342 * If we get in here, there was no action in
3343 * do_send_packet. So, we check if there is a
3344 * packing buffer to be flushed here.
3345 */
3346 index = queue->next_buf_to_fill;
3347 q_was_packing = queue->do_pack;
3348 /* queue->do_pack may change */
3349 barrier();
3350 flush_cnt += qeth_switch_to_nonpacking_if_needed(queue);
3351 if (!flush_cnt &&
3352 !atomic_read(&queue->set_pci_flags_count))
3353 flush_cnt += qeth_prep_flush_pack_buffer(queue);
3354 if (q_was_packing)
3355 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_cnt);
3356 if (flush_cnt)
3357 qeth_flush_buffers(queue, index, flush_cnt);
3358 atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
3359 }
3360 }
3361 }
3362
qeth_qdio_start_poll(struct ccw_device * ccwdev,int queue,unsigned long card_ptr)3363 static void qeth_qdio_start_poll(struct ccw_device *ccwdev, int queue,
3364 unsigned long card_ptr)
3365 {
3366 struct qeth_card *card = (struct qeth_card *)card_ptr;
3367
3368 if (card->dev->flags & IFF_UP)
3369 napi_schedule(&card->napi);
3370 }
3371
qeth_configure_cq(struct qeth_card * card,enum qeth_cq cq)3372 int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq)
3373 {
3374 int rc;
3375
3376 if (card->options.cq == QETH_CQ_NOTAVAILABLE) {
3377 rc = -1;
3378 goto out;
3379 } else {
3380 if (card->options.cq == cq) {
3381 rc = 0;
3382 goto out;
3383 }
3384
3385 if (card->state != CARD_STATE_DOWN) {
3386 rc = -1;
3387 goto out;
3388 }
3389
3390 qeth_free_qdio_queues(card);
3391 card->options.cq = cq;
3392 rc = 0;
3393 }
3394 out:
3395 return rc;
3396
3397 }
3398 EXPORT_SYMBOL_GPL(qeth_configure_cq);
3399
qeth_qdio_cq_handler(struct qeth_card * card,unsigned int qdio_err,unsigned int queue,int first_element,int count)3400 static void qeth_qdio_cq_handler(struct qeth_card *card, unsigned int qdio_err,
3401 unsigned int queue, int first_element,
3402 int count)
3403 {
3404 struct qeth_qdio_q *cq = card->qdio.c_q;
3405 int i;
3406 int rc;
3407
3408 if (!qeth_is_cq(card, queue))
3409 return;
3410
3411 QETH_CARD_TEXT_(card, 5, "qcqhe%d", first_element);
3412 QETH_CARD_TEXT_(card, 5, "qcqhc%d", count);
3413 QETH_CARD_TEXT_(card, 5, "qcqherr%d", qdio_err);
3414
3415 if (qdio_err) {
3416 netif_tx_stop_all_queues(card->dev);
3417 qeth_schedule_recovery(card);
3418 return;
3419 }
3420
3421 for (i = first_element; i < first_element + count; ++i) {
3422 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3423 struct qdio_buffer *buffer = cq->qdio_bufs[bidx];
3424 int e = 0;
3425
3426 while ((e < QDIO_MAX_ELEMENTS_PER_BUFFER) &&
3427 buffer->element[e].addr) {
3428 unsigned long phys_aob_addr;
3429
3430 phys_aob_addr = (unsigned long) buffer->element[e].addr;
3431 qeth_qdio_handle_aob(card, phys_aob_addr);
3432 ++e;
3433 }
3434 qeth_scrub_qdio_buffer(buffer, QDIO_MAX_ELEMENTS_PER_BUFFER);
3435 }
3436 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, queue,
3437 card->qdio.c_q->next_buf_to_init,
3438 count);
3439 if (rc) {
3440 dev_warn(&card->gdev->dev,
3441 "QDIO reported an error, rc=%i\n", rc);
3442 QETH_CARD_TEXT(card, 2, "qcqherr");
3443 }
3444 card->qdio.c_q->next_buf_to_init = (card->qdio.c_q->next_buf_to_init
3445 + count) % QDIO_MAX_BUFFERS_PER_Q;
3446 }
3447
qeth_qdio_input_handler(struct ccw_device * ccwdev,unsigned int qdio_err,int queue,int first_elem,int count,unsigned long card_ptr)3448 static void qeth_qdio_input_handler(struct ccw_device *ccwdev,
3449 unsigned int qdio_err, int queue,
3450 int first_elem, int count,
3451 unsigned long card_ptr)
3452 {
3453 struct qeth_card *card = (struct qeth_card *)card_ptr;
3454
3455 QETH_CARD_TEXT_(card, 2, "qihq%d", queue);
3456 QETH_CARD_TEXT_(card, 2, "qiec%d", qdio_err);
3457
3458 if (qeth_is_cq(card, queue))
3459 qeth_qdio_cq_handler(card, qdio_err, queue, first_elem, count);
3460 else if (qdio_err)
3461 qeth_schedule_recovery(card);
3462 }
3463
qeth_qdio_output_handler(struct ccw_device * ccwdev,unsigned int qdio_error,int __queue,int first_element,int count,unsigned long card_ptr)3464 static void qeth_qdio_output_handler(struct ccw_device *ccwdev,
3465 unsigned int qdio_error, int __queue,
3466 int first_element, int count,
3467 unsigned long card_ptr)
3468 {
3469 struct qeth_card *card = (struct qeth_card *) card_ptr;
3470 struct qeth_qdio_out_q *queue = card->qdio.out_qs[__queue];
3471 struct qeth_qdio_out_buffer *buffer;
3472 struct net_device *dev = card->dev;
3473 struct netdev_queue *txq;
3474 int i;
3475
3476 QETH_CARD_TEXT(card, 6, "qdouhdl");
3477 if (qdio_error & QDIO_ERROR_FATAL) {
3478 QETH_CARD_TEXT(card, 2, "achkcond");
3479 netif_tx_stop_all_queues(dev);
3480 qeth_schedule_recovery(card);
3481 return;
3482 }
3483
3484 for (i = first_element; i < (first_element + count); ++i) {
3485 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3486 buffer = queue->bufs[bidx];
3487 qeth_handle_send_error(card, buffer, qdio_error);
3488 qeth_clear_output_buffer(queue, buffer, qdio_error, 0);
3489 }
3490
3491 atomic_sub(count, &queue->used_buffers);
3492 qeth_check_outbound_queue(queue);
3493
3494 txq = netdev_get_tx_queue(dev, __queue);
3495 /* xmit may have observed the full-condition, but not yet stopped the
3496 * txq. In which case the code below won't trigger. So before returning,
3497 * xmit will re-check the txq's fill level and wake it up if needed.
3498 */
3499 if (netif_tx_queue_stopped(txq) && !qeth_out_queue_is_full(queue))
3500 netif_tx_wake_queue(txq);
3501 }
3502
3503 /**
3504 * Note: Function assumes that we have 4 outbound queues.
3505 */
qeth_get_priority_queue(struct qeth_card * card,struct sk_buff * skb)3506 int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb)
3507 {
3508 struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
3509 u8 tos;
3510
3511 switch (card->qdio.do_prio_queueing) {
3512 case QETH_PRIO_Q_ING_TOS:
3513 case QETH_PRIO_Q_ING_PREC:
3514 switch (qeth_get_ip_version(skb)) {
3515 case 4:
3516 tos = ipv4_get_dsfield(ip_hdr(skb));
3517 break;
3518 case 6:
3519 tos = ipv6_get_dsfield(ipv6_hdr(skb));
3520 break;
3521 default:
3522 return card->qdio.default_out_queue;
3523 }
3524 if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC)
3525 return ~tos >> 6 & 3;
3526 if (tos & IPTOS_MINCOST)
3527 return 3;
3528 if (tos & IPTOS_RELIABILITY)
3529 return 2;
3530 if (tos & IPTOS_THROUGHPUT)
3531 return 1;
3532 if (tos & IPTOS_LOWDELAY)
3533 return 0;
3534 break;
3535 case QETH_PRIO_Q_ING_SKB:
3536 if (skb->priority > 5)
3537 return 0;
3538 return ~skb->priority >> 1 & 3;
3539 case QETH_PRIO_Q_ING_VLAN:
3540 if (veth->h_vlan_proto == htons(ETH_P_8021Q))
3541 return ~ntohs(veth->h_vlan_TCI) >>
3542 (VLAN_PRIO_SHIFT + 1) & 3;
3543 break;
3544 default:
3545 break;
3546 }
3547 return card->qdio.default_out_queue;
3548 }
3549 EXPORT_SYMBOL_GPL(qeth_get_priority_queue);
3550
3551 /**
3552 * qeth_get_elements_for_frags() - find number of SBALEs for skb frags.
3553 * @skb: SKB address
3554 *
3555 * Returns the number of pages, and thus QDIO buffer elements, needed to cover
3556 * fragmented part of the SKB. Returns zero for linear SKB.
3557 */
qeth_get_elements_for_frags(struct sk_buff * skb)3558 static int qeth_get_elements_for_frags(struct sk_buff *skb)
3559 {
3560 int cnt, elements = 0;
3561
3562 for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3563 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
3564
3565 elements += qeth_get_elements_for_range(
3566 (addr_t)skb_frag_address(frag),
3567 (addr_t)skb_frag_address(frag) + skb_frag_size(frag));
3568 }
3569 return elements;
3570 }
3571
3572 /**
3573 * qeth_count_elements() - Counts the number of QDIO buffer elements needed
3574 * to transmit an skb.
3575 * @skb: the skb to operate on.
3576 * @data_offset: skip this part of the skb's linear data
3577 *
3578 * Returns the number of pages, and thus QDIO buffer elements, needed to map the
3579 * skb's data (both its linear part and paged fragments).
3580 */
qeth_count_elements(struct sk_buff * skb,unsigned int data_offset)3581 unsigned int qeth_count_elements(struct sk_buff *skb, unsigned int data_offset)
3582 {
3583 unsigned int elements = qeth_get_elements_for_frags(skb);
3584 addr_t end = (addr_t)skb->data + skb_headlen(skb);
3585 addr_t start = (addr_t)skb->data + data_offset;
3586
3587 if (start != end)
3588 elements += qeth_get_elements_for_range(start, end);
3589 return elements;
3590 }
3591 EXPORT_SYMBOL_GPL(qeth_count_elements);
3592
3593 #define QETH_HDR_CACHE_OBJ_SIZE (sizeof(struct qeth_hdr_tso) + \
3594 MAX_TCP_HEADER)
3595
3596 /**
3597 * qeth_add_hw_header() - add a HW header to an skb.
3598 * @skb: skb that the HW header should be added to.
3599 * @hdr: double pointer to a qeth_hdr. When returning with >= 0,
3600 * it contains a valid pointer to a qeth_hdr.
3601 * @hdr_len: length of the HW header.
3602 * @proto_len: length of protocol headers that need to be in same page as the
3603 * HW header.
3604 *
3605 * Returns the pushed length. If the header can't be pushed on
3606 * (eg. because it would cross a page boundary), it is allocated from
3607 * the cache instead and 0 is returned.
3608 * The number of needed buffer elements is returned in @elements.
3609 * Error to create the hdr is indicated by returning with < 0.
3610 */
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)3611 static int qeth_add_hw_header(struct qeth_qdio_out_q *queue,
3612 struct sk_buff *skb, struct qeth_hdr **hdr,
3613 unsigned int hdr_len, unsigned int proto_len,
3614 unsigned int *elements)
3615 {
3616 const unsigned int contiguous = proto_len ? proto_len : 1;
3617 const unsigned int max_elements = queue->max_elements;
3618 unsigned int __elements;
3619 addr_t start, end;
3620 bool push_ok;
3621 int rc;
3622
3623 check_layout:
3624 start = (addr_t)skb->data - hdr_len;
3625 end = (addr_t)skb->data;
3626
3627 if (qeth_get_elements_for_range(start, end + contiguous) == 1) {
3628 /* Push HW header into same page as first protocol header. */
3629 push_ok = true;
3630 /* ... but TSO always needs a separate element for headers: */
3631 if (skb_is_gso(skb))
3632 __elements = 1 + qeth_count_elements(skb, proto_len);
3633 else
3634 __elements = qeth_count_elements(skb, 0);
3635 } else if (!proto_len && PAGE_ALIGNED(skb->data)) {
3636 /* Push HW header into preceding page, flush with skb->data. */
3637 push_ok = true;
3638 __elements = 1 + qeth_count_elements(skb, 0);
3639 } else {
3640 /* Use header cache, copy protocol headers up. */
3641 push_ok = false;
3642 __elements = 1 + qeth_count_elements(skb, proto_len);
3643 }
3644
3645 /* Compress skb to fit into one IO buffer: */
3646 if (__elements > max_elements) {
3647 if (!skb_is_nonlinear(skb)) {
3648 /* Drop it, no easy way of shrinking it further. */
3649 QETH_DBF_MESSAGE(2, "Dropped an oversized skb (Max Elements=%u / Actual=%u / Length=%u).\n",
3650 max_elements, __elements, skb->len);
3651 return -E2BIG;
3652 }
3653
3654 rc = skb_linearize(skb);
3655 if (rc) {
3656 QETH_TXQ_STAT_INC(queue, skbs_linearized_fail);
3657 return rc;
3658 }
3659
3660 QETH_TXQ_STAT_INC(queue, skbs_linearized);
3661 /* Linearization changed the layout, re-evaluate: */
3662 goto check_layout;
3663 }
3664
3665 *elements = __elements;
3666 /* Add the header: */
3667 if (push_ok) {
3668 *hdr = skb_push(skb, hdr_len);
3669 return hdr_len;
3670 }
3671 /* fall back */
3672 if (hdr_len + proto_len > QETH_HDR_CACHE_OBJ_SIZE)
3673 return -E2BIG;
3674 *hdr = kmem_cache_alloc(qeth_core_header_cache, GFP_ATOMIC);
3675 if (!*hdr)
3676 return -ENOMEM;
3677 /* Copy protocol headers behind HW header: */
3678 skb_copy_from_linear_data(skb, ((char *)*hdr) + hdr_len, proto_len);
3679 return 0;
3680 }
3681
qeth_iqd_may_bulk(struct qeth_qdio_out_q * queue,struct qeth_qdio_out_buffer * buffer,struct sk_buff * curr_skb,struct qeth_hdr * curr_hdr)3682 static bool qeth_iqd_may_bulk(struct qeth_qdio_out_q *queue,
3683 struct qeth_qdio_out_buffer *buffer,
3684 struct sk_buff *curr_skb,
3685 struct qeth_hdr *curr_hdr)
3686 {
3687 struct qeth_hdr *prev_hdr = queue->prev_hdr;
3688
3689 if (!prev_hdr)
3690 return true;
3691
3692 /* All packets must have the same target: */
3693 if (curr_hdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER2) {
3694 struct sk_buff *prev_skb = skb_peek(&buffer->skb_list);
3695
3696 return ether_addr_equal(eth_hdr(prev_skb)->h_dest,
3697 eth_hdr(curr_skb)->h_dest) &&
3698 qeth_l2_same_vlan(&prev_hdr->hdr.l2, &curr_hdr->hdr.l2);
3699 }
3700
3701 return qeth_l3_same_next_hop(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3) &&
3702 qeth_l3_iqd_same_vlan(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3);
3703 }
3704
__qeth_fill_buffer(struct sk_buff * skb,struct qeth_qdio_out_buffer * buf,bool is_first_elem,unsigned int offset)3705 static unsigned int __qeth_fill_buffer(struct sk_buff *skb,
3706 struct qeth_qdio_out_buffer *buf,
3707 bool is_first_elem, unsigned int offset)
3708 {
3709 struct qdio_buffer *buffer = buf->buffer;
3710 int element = buf->next_element_to_fill;
3711 int length = skb_headlen(skb) - offset;
3712 char *data = skb->data + offset;
3713 unsigned int elem_length, cnt;
3714
3715 /* map linear part into buffer element(s) */
3716 while (length > 0) {
3717 elem_length = min_t(unsigned int, length,
3718 PAGE_SIZE - offset_in_page(data));
3719
3720 buffer->element[element].addr = data;
3721 buffer->element[element].length = elem_length;
3722 length -= elem_length;
3723 if (is_first_elem) {
3724 is_first_elem = false;
3725 if (length || skb_is_nonlinear(skb))
3726 /* skb needs additional elements */
3727 buffer->element[element].eflags =
3728 SBAL_EFLAGS_FIRST_FRAG;
3729 else
3730 buffer->element[element].eflags = 0;
3731 } else {
3732 buffer->element[element].eflags =
3733 SBAL_EFLAGS_MIDDLE_FRAG;
3734 }
3735
3736 data += elem_length;
3737 element++;
3738 }
3739
3740 /* map page frags into buffer element(s) */
3741 for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3742 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
3743
3744 data = skb_frag_address(frag);
3745 length = skb_frag_size(frag);
3746 while (length > 0) {
3747 elem_length = min_t(unsigned int, length,
3748 PAGE_SIZE - offset_in_page(data));
3749
3750 buffer->element[element].addr = data;
3751 buffer->element[element].length = elem_length;
3752 buffer->element[element].eflags =
3753 SBAL_EFLAGS_MIDDLE_FRAG;
3754
3755 length -= elem_length;
3756 data += elem_length;
3757 element++;
3758 }
3759 }
3760
3761 if (buffer->element[element - 1].eflags)
3762 buffer->element[element - 1].eflags = SBAL_EFLAGS_LAST_FRAG;
3763 buf->next_element_to_fill = element;
3764 return element;
3765 }
3766
3767 /**
3768 * qeth_fill_buffer() - map skb into an output buffer
3769 * @buf: buffer to transport the skb
3770 * @skb: skb to map into the buffer
3771 * @hdr: qeth_hdr for this skb. Either at skb->data, or allocated
3772 * from qeth_core_header_cache.
3773 * @offset: when mapping the skb, start at skb->data + offset
3774 * @hd_len: if > 0, build a dedicated header element of this size
3775 */
qeth_fill_buffer(struct qeth_qdio_out_buffer * buf,struct sk_buff * skb,struct qeth_hdr * hdr,unsigned int offset,unsigned int hd_len)3776 static unsigned int qeth_fill_buffer(struct qeth_qdio_out_buffer *buf,
3777 struct sk_buff *skb, struct qeth_hdr *hdr,
3778 unsigned int offset, unsigned int hd_len)
3779 {
3780 struct qdio_buffer *buffer = buf->buffer;
3781 bool is_first_elem = true;
3782
3783 __skb_queue_tail(&buf->skb_list, skb);
3784
3785 /* build dedicated header element */
3786 if (hd_len) {
3787 int element = buf->next_element_to_fill;
3788 is_first_elem = false;
3789
3790 buffer->element[element].addr = hdr;
3791 buffer->element[element].length = hd_len;
3792 buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
3793 /* remember to free cache-allocated qeth_hdr: */
3794 buf->is_header[element] = ((void *)hdr != skb->data);
3795 buf->next_element_to_fill++;
3796 }
3797
3798 return __qeth_fill_buffer(skb, buf, is_first_elem, offset);
3799 }
3800
__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)3801 static int __qeth_xmit(struct qeth_card *card, struct qeth_qdio_out_q *queue,
3802 struct sk_buff *skb, unsigned int elements,
3803 struct qeth_hdr *hdr, unsigned int offset,
3804 unsigned int hd_len)
3805 {
3806 struct qeth_qdio_out_buffer *buffer = queue->bufs[queue->bulk_start];
3807 unsigned int bytes = qdisc_pkt_len(skb);
3808 unsigned int next_element;
3809 struct netdev_queue *txq;
3810 bool stopped = false;
3811 bool flush;
3812
3813 txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
3814
3815 /* Just a sanity check, the wake/stop logic should ensure that we always
3816 * get a free buffer.
3817 */
3818 if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
3819 return -EBUSY;
3820
3821 if ((buffer->next_element_to_fill + elements > queue->max_elements) ||
3822 !qeth_iqd_may_bulk(queue, buffer, skb, hdr)) {
3823 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3824 qeth_flush_queue(queue);
3825 buffer = queue->bufs[queue->bulk_start];
3826
3827 /* Sanity-check again: */
3828 if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
3829 return -EBUSY;
3830 }
3831
3832 if (buffer->next_element_to_fill == 0 &&
3833 atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
3834 /* If a TX completion happens right _here_ and misses to wake
3835 * the txq, then our re-check below will catch the race.
3836 */
3837 QETH_TXQ_STAT_INC(queue, stopped);
3838 netif_tx_stop_queue(txq);
3839 stopped = true;
3840 }
3841
3842 next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
3843 buffer->bytes += bytes;
3844 queue->prev_hdr = hdr;
3845
3846 flush = __netdev_tx_sent_queue(txq, bytes,
3847 !stopped && netdev_xmit_more());
3848
3849 if (flush || next_element >= queue->max_elements) {
3850 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3851 qeth_flush_queue(queue);
3852 }
3853
3854 if (stopped && !qeth_out_queue_is_full(queue))
3855 netif_tx_start_queue(txq);
3856 return 0;
3857 }
3858
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,int elements_needed)3859 int qeth_do_send_packet(struct qeth_card *card, struct qeth_qdio_out_q *queue,
3860 struct sk_buff *skb, struct qeth_hdr *hdr,
3861 unsigned int offset, unsigned int hd_len,
3862 int elements_needed)
3863 {
3864 struct qeth_qdio_out_buffer *buffer;
3865 unsigned int next_element;
3866 struct netdev_queue *txq;
3867 bool stopped = false;
3868 int start_index;
3869 int flush_count = 0;
3870 int do_pack = 0;
3871 int tmp;
3872 int rc = 0;
3873
3874 /* spin until we get the queue ... */
3875 while (atomic_cmpxchg(&queue->state, QETH_OUT_Q_UNLOCKED,
3876 QETH_OUT_Q_LOCKED) != QETH_OUT_Q_UNLOCKED);
3877 start_index = queue->next_buf_to_fill;
3878 buffer = queue->bufs[queue->next_buf_to_fill];
3879
3880 /* Just a sanity check, the wake/stop logic should ensure that we always
3881 * get a free buffer.
3882 */
3883 if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY) {
3884 atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
3885 return -EBUSY;
3886 }
3887
3888 txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
3889
3890 /* check if we need to switch packing state of this queue */
3891 qeth_switch_to_packing_if_needed(queue);
3892 if (queue->do_pack) {
3893 do_pack = 1;
3894 /* does packet fit in current buffer? */
3895 if (buffer->next_element_to_fill + elements_needed >
3896 queue->max_elements) {
3897 /* ... no -> set state PRIMED */
3898 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3899 flush_count++;
3900 queue->next_buf_to_fill =
3901 (queue->next_buf_to_fill + 1) %
3902 QDIO_MAX_BUFFERS_PER_Q;
3903 buffer = queue->bufs[queue->next_buf_to_fill];
3904
3905 /* We stepped forward, so sanity-check again: */
3906 if (atomic_read(&buffer->state) !=
3907 QETH_QDIO_BUF_EMPTY) {
3908 qeth_flush_buffers(queue, start_index,
3909 flush_count);
3910 atomic_set(&queue->state,
3911 QETH_OUT_Q_UNLOCKED);
3912 rc = -EBUSY;
3913 goto out;
3914 }
3915 }
3916 }
3917
3918 if (buffer->next_element_to_fill == 0 &&
3919 atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
3920 /* If a TX completion happens right _here_ and misses to wake
3921 * the txq, then our re-check below will catch the race.
3922 */
3923 QETH_TXQ_STAT_INC(queue, stopped);
3924 netif_tx_stop_queue(txq);
3925 stopped = true;
3926 }
3927
3928 next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
3929
3930 if (queue->do_pack)
3931 QETH_TXQ_STAT_INC(queue, skbs_pack);
3932 if (!queue->do_pack || stopped || next_element >= queue->max_elements) {
3933 flush_count++;
3934 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3935 queue->next_buf_to_fill = (queue->next_buf_to_fill + 1) %
3936 QDIO_MAX_BUFFERS_PER_Q;
3937 }
3938
3939 if (flush_count)
3940 qeth_flush_buffers(queue, start_index, flush_count);
3941 else if (!atomic_read(&queue->set_pci_flags_count))
3942 atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH);
3943 /*
3944 * queue->state will go from LOCKED -> UNLOCKED or from
3945 * LOCKED_FLUSH -> LOCKED if output_handler wanted to 'notify' us
3946 * (switch packing state or flush buffer to get another pci flag out).
3947 * In that case we will enter this loop
3948 */
3949 while (atomic_dec_return(&queue->state)) {
3950 start_index = queue->next_buf_to_fill;
3951 /* check if we can go back to non-packing state */
3952 tmp = qeth_switch_to_nonpacking_if_needed(queue);
3953 /*
3954 * check if we need to flush a packing buffer to get a pci
3955 * flag out on the queue
3956 */
3957 if (!tmp && !atomic_read(&queue->set_pci_flags_count))
3958 tmp = qeth_prep_flush_pack_buffer(queue);
3959 if (tmp) {
3960 qeth_flush_buffers(queue, start_index, tmp);
3961 flush_count += tmp;
3962 }
3963 }
3964 out:
3965 /* at this point the queue is UNLOCKED again */
3966 if (do_pack)
3967 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_count);
3968
3969 if (stopped && !qeth_out_queue_is_full(queue))
3970 netif_tx_start_queue(txq);
3971 return rc;
3972 }
3973 EXPORT_SYMBOL_GPL(qeth_do_send_packet);
3974
qeth_fill_tso_ext(struct qeth_hdr_tso * hdr,unsigned int payload_len,struct sk_buff * skb,unsigned int proto_len)3975 static void qeth_fill_tso_ext(struct qeth_hdr_tso *hdr,
3976 unsigned int payload_len, struct sk_buff *skb,
3977 unsigned int proto_len)
3978 {
3979 struct qeth_hdr_ext_tso *ext = &hdr->ext;
3980
3981 ext->hdr_tot_len = sizeof(*ext);
3982 ext->imb_hdr_no = 1;
3983 ext->hdr_type = 1;
3984 ext->hdr_version = 1;
3985 ext->hdr_len = 28;
3986 ext->payload_len = payload_len;
3987 ext->mss = skb_shinfo(skb)->gso_size;
3988 ext->dg_hdr_len = proto_len;
3989 }
3990
qeth_xmit(struct qeth_card * card,struct sk_buff * skb,struct qeth_qdio_out_q * queue,int ipv,void (* fill_header)(struct qeth_qdio_out_q * queue,struct qeth_hdr * hdr,struct sk_buff * skb,int ipv,unsigned int data_len))3991 int qeth_xmit(struct qeth_card *card, struct sk_buff *skb,
3992 struct qeth_qdio_out_q *queue, int ipv,
3993 void (*fill_header)(struct qeth_qdio_out_q *queue,
3994 struct qeth_hdr *hdr, struct sk_buff *skb,
3995 int ipv, unsigned int data_len))
3996 {
3997 unsigned int proto_len, hw_hdr_len;
3998 unsigned int frame_len = skb->len;
3999 bool is_tso = skb_is_gso(skb);
4000 unsigned int data_offset = 0;
4001 struct qeth_hdr *hdr = NULL;
4002 unsigned int hd_len = 0;
4003 unsigned int elements;
4004 int push_len, rc;
4005
4006 if (is_tso) {
4007 hw_hdr_len = sizeof(struct qeth_hdr_tso);
4008 proto_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
4009 } else {
4010 hw_hdr_len = sizeof(struct qeth_hdr);
4011 proto_len = (IS_IQD(card) && IS_LAYER2(card)) ? ETH_HLEN : 0;
4012 }
4013
4014 rc = skb_cow_head(skb, hw_hdr_len);
4015 if (rc)
4016 return rc;
4017
4018 push_len = qeth_add_hw_header(queue, skb, &hdr, hw_hdr_len, proto_len,
4019 &elements);
4020 if (push_len < 0)
4021 return push_len;
4022 if (is_tso || !push_len) {
4023 /* HW header needs its own buffer element. */
4024 hd_len = hw_hdr_len + proto_len;
4025 data_offset = push_len + proto_len;
4026 }
4027 memset(hdr, 0, hw_hdr_len);
4028 fill_header(queue, hdr, skb, ipv, frame_len);
4029 if (is_tso)
4030 qeth_fill_tso_ext((struct qeth_hdr_tso *) hdr,
4031 frame_len - proto_len, skb, proto_len);
4032
4033 if (IS_IQD(card)) {
4034 rc = __qeth_xmit(card, queue, skb, elements, hdr, data_offset,
4035 hd_len);
4036 } else {
4037 /* TODO: drop skb_orphan() once TX completion is fast enough */
4038 skb_orphan(skb);
4039 rc = qeth_do_send_packet(card, queue, skb, hdr, data_offset,
4040 hd_len, elements);
4041 }
4042
4043 if (rc && !push_len)
4044 kmem_cache_free(qeth_core_header_cache, hdr);
4045
4046 return rc;
4047 }
4048 EXPORT_SYMBOL_GPL(qeth_xmit);
4049
qeth_setadp_promisc_mode_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)4050 static int qeth_setadp_promisc_mode_cb(struct qeth_card *card,
4051 struct qeth_reply *reply, unsigned long data)
4052 {
4053 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4054 struct qeth_ipacmd_setadpparms *setparms;
4055
4056 QETH_CARD_TEXT(card, 4, "prmadpcb");
4057
4058 setparms = &(cmd->data.setadapterparms);
4059 if (qeth_setadpparms_inspect_rc(cmd)) {
4060 QETH_CARD_TEXT_(card, 4, "prmrc%x", cmd->hdr.return_code);
4061 setparms->data.mode = SET_PROMISC_MODE_OFF;
4062 }
4063 card->info.promisc_mode = setparms->data.mode;
4064 return (cmd->hdr.return_code) ? -EIO : 0;
4065 }
4066
qeth_setadp_promisc_mode(struct qeth_card * card,bool enable)4067 void qeth_setadp_promisc_mode(struct qeth_card *card, bool enable)
4068 {
4069 enum qeth_ipa_promisc_modes mode = enable ? SET_PROMISC_MODE_ON :
4070 SET_PROMISC_MODE_OFF;
4071 struct qeth_cmd_buffer *iob;
4072 struct qeth_ipa_cmd *cmd;
4073
4074 QETH_CARD_TEXT(card, 4, "setprom");
4075 QETH_CARD_TEXT_(card, 4, "mode:%x", mode);
4076
4077 iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE,
4078 SETADP_DATA_SIZEOF(mode));
4079 if (!iob)
4080 return;
4081 cmd = __ipa_cmd(iob);
4082 cmd->data.setadapterparms.data.mode = mode;
4083 qeth_send_ipa_cmd(card, iob, qeth_setadp_promisc_mode_cb, NULL);
4084 }
4085 EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode);
4086
qeth_setadpparms_change_macaddr_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)4087 static int qeth_setadpparms_change_macaddr_cb(struct qeth_card *card,
4088 struct qeth_reply *reply, unsigned long data)
4089 {
4090 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4091 struct qeth_ipacmd_setadpparms *adp_cmd;
4092
4093 QETH_CARD_TEXT(card, 4, "chgmaccb");
4094 if (qeth_setadpparms_inspect_rc(cmd))
4095 return -EIO;
4096
4097 adp_cmd = &cmd->data.setadapterparms;
4098 if (!is_valid_ether_addr(adp_cmd->data.change_addr.addr))
4099 return -EADDRNOTAVAIL;
4100
4101 if (IS_LAYER2(card) && IS_OSD(card) && !IS_VM_NIC(card) &&
4102 !(adp_cmd->hdr.flags & QETH_SETADP_FLAGS_VIRTUAL_MAC))
4103 return -EADDRNOTAVAIL;
4104
4105 ether_addr_copy(card->dev->dev_addr, adp_cmd->data.change_addr.addr);
4106 return 0;
4107 }
4108
qeth_setadpparms_change_macaddr(struct qeth_card * card)4109 int qeth_setadpparms_change_macaddr(struct qeth_card *card)
4110 {
4111 int rc;
4112 struct qeth_cmd_buffer *iob;
4113 struct qeth_ipa_cmd *cmd;
4114
4115 QETH_CARD_TEXT(card, 4, "chgmac");
4116
4117 iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS,
4118 SETADP_DATA_SIZEOF(change_addr));
4119 if (!iob)
4120 return -ENOMEM;
4121 cmd = __ipa_cmd(iob);
4122 cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC;
4123 cmd->data.setadapterparms.data.change_addr.addr_size = ETH_ALEN;
4124 ether_addr_copy(cmd->data.setadapterparms.data.change_addr.addr,
4125 card->dev->dev_addr);
4126 rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_change_macaddr_cb,
4127 NULL);
4128 return rc;
4129 }
4130 EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr);
4131
qeth_setadpparms_set_access_ctrl_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)4132 static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card,
4133 struct qeth_reply *reply, unsigned long data)
4134 {
4135 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4136 struct qeth_set_access_ctrl *access_ctrl_req;
4137 int fallback = *(int *)reply->param;
4138
4139 QETH_CARD_TEXT(card, 4, "setaccb");
4140 if (cmd->hdr.return_code)
4141 return -EIO;
4142 qeth_setadpparms_inspect_rc(cmd);
4143
4144 access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4145 QETH_CARD_TEXT_(card, 2, "rc=%d",
4146 cmd->data.setadapterparms.hdr.return_code);
4147 if (cmd->data.setadapterparms.hdr.return_code !=
4148 SET_ACCESS_CTRL_RC_SUCCESS)
4149 QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%#x) on device %x: %#x\n",
4150 access_ctrl_req->subcmd_code, CARD_DEVID(card),
4151 cmd->data.setadapterparms.hdr.return_code);
4152 switch (cmd->data.setadapterparms.hdr.return_code) {
4153 case SET_ACCESS_CTRL_RC_SUCCESS:
4154 if (card->options.isolation == ISOLATION_MODE_NONE) {
4155 dev_info(&card->gdev->dev,
4156 "QDIO data connection isolation is deactivated\n");
4157 } else {
4158 dev_info(&card->gdev->dev,
4159 "QDIO data connection isolation is activated\n");
4160 }
4161 break;
4162 case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
4163 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already deactivated\n",
4164 CARD_DEVID(card));
4165 if (fallback)
4166 card->options.isolation = card->options.prev_isolation;
4167 break;
4168 case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
4169 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already activated\n",
4170 CARD_DEVID(card));
4171 if (fallback)
4172 card->options.isolation = card->options.prev_isolation;
4173 break;
4174 case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
4175 dev_err(&card->gdev->dev, "Adapter does not "
4176 "support QDIO data connection isolation\n");
4177 break;
4178 case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
4179 dev_err(&card->gdev->dev,
4180 "Adapter is dedicated. "
4181 "QDIO data connection isolation not supported\n");
4182 if (fallback)
4183 card->options.isolation = card->options.prev_isolation;
4184 break;
4185 case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
4186 dev_err(&card->gdev->dev,
4187 "TSO does not permit QDIO data connection isolation\n");
4188 if (fallback)
4189 card->options.isolation = card->options.prev_isolation;
4190 break;
4191 case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED:
4192 dev_err(&card->gdev->dev, "The adjacent switch port does not "
4193 "support reflective relay mode\n");
4194 if (fallback)
4195 card->options.isolation = card->options.prev_isolation;
4196 break;
4197 case SET_ACCESS_CTRL_RC_REFLREL_FAILED:
4198 dev_err(&card->gdev->dev, "The reflective relay mode cannot be "
4199 "enabled at the adjacent switch port");
4200 if (fallback)
4201 card->options.isolation = card->options.prev_isolation;
4202 break;
4203 case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED:
4204 dev_warn(&card->gdev->dev, "Turning off reflective relay mode "
4205 "at the adjacent switch failed\n");
4206 break;
4207 default:
4208 /* this should never happen */
4209 if (fallback)
4210 card->options.isolation = card->options.prev_isolation;
4211 break;
4212 }
4213 return (cmd->hdr.return_code) ? -EIO : 0;
4214 }
4215
qeth_setadpparms_set_access_ctrl(struct qeth_card * card,enum qeth_ipa_isolation_modes isolation,int fallback)4216 static int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
4217 enum qeth_ipa_isolation_modes isolation, int fallback)
4218 {
4219 int rc;
4220 struct qeth_cmd_buffer *iob;
4221 struct qeth_ipa_cmd *cmd;
4222 struct qeth_set_access_ctrl *access_ctrl_req;
4223
4224 QETH_CARD_TEXT(card, 4, "setacctl");
4225
4226 iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
4227 SETADP_DATA_SIZEOF(set_access_ctrl));
4228 if (!iob)
4229 return -ENOMEM;
4230 cmd = __ipa_cmd(iob);
4231 access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4232 access_ctrl_req->subcmd_code = isolation;
4233
4234 rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb,
4235 &fallback);
4236 QETH_CARD_TEXT_(card, 2, "rc=%d", rc);
4237 return rc;
4238 }
4239
qeth_set_access_ctrl_online(struct qeth_card * card,int fallback)4240 int qeth_set_access_ctrl_online(struct qeth_card *card, int fallback)
4241 {
4242 int rc = 0;
4243
4244 QETH_CARD_TEXT(card, 4, "setactlo");
4245
4246 if ((IS_OSD(card) || IS_OSX(card)) &&
4247 qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
4248 rc = qeth_setadpparms_set_access_ctrl(card,
4249 card->options.isolation, fallback);
4250 if (rc) {
4251 QETH_DBF_MESSAGE(3, "IPA(SET_ACCESS_CTRL(%d) on device %x: sent failed\n",
4252 rc, CARD_DEVID(card));
4253 rc = -EOPNOTSUPP;
4254 }
4255 } else if (card->options.isolation != ISOLATION_MODE_NONE) {
4256 card->options.isolation = ISOLATION_MODE_NONE;
4257
4258 dev_err(&card->gdev->dev, "Adapter does not "
4259 "support QDIO data connection isolation\n");
4260 rc = -EOPNOTSUPP;
4261 }
4262 return rc;
4263 }
4264 EXPORT_SYMBOL_GPL(qeth_set_access_ctrl_online);
4265
qeth_tx_timeout(struct net_device * dev)4266 void qeth_tx_timeout(struct net_device *dev)
4267 {
4268 struct qeth_card *card;
4269
4270 card = dev->ml_priv;
4271 QETH_CARD_TEXT(card, 4, "txtimeo");
4272 qeth_schedule_recovery(card);
4273 }
4274 EXPORT_SYMBOL_GPL(qeth_tx_timeout);
4275
qeth_mdio_read(struct net_device * dev,int phy_id,int regnum)4276 static int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum)
4277 {
4278 struct qeth_card *card = dev->ml_priv;
4279 int rc = 0;
4280
4281 switch (regnum) {
4282 case MII_BMCR: /* Basic mode control register */
4283 rc = BMCR_FULLDPLX;
4284 if ((card->info.link_type != QETH_LINK_TYPE_GBIT_ETH) &&
4285 (card->info.link_type != QETH_LINK_TYPE_OSN) &&
4286 (card->info.link_type != QETH_LINK_TYPE_10GBIT_ETH) &&
4287 (card->info.link_type != QETH_LINK_TYPE_25GBIT_ETH))
4288 rc |= BMCR_SPEED100;
4289 break;
4290 case MII_BMSR: /* Basic mode status register */
4291 rc = BMSR_ERCAP | BMSR_ANEGCOMPLETE | BMSR_LSTATUS |
4292 BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL |
4293 BMSR_100BASE4;
4294 break;
4295 case MII_PHYSID1: /* PHYS ID 1 */
4296 rc = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 8) |
4297 dev->dev_addr[2];
4298 rc = (rc >> 5) & 0xFFFF;
4299 break;
4300 case MII_PHYSID2: /* PHYS ID 2 */
4301 rc = (dev->dev_addr[2] << 10) & 0xFFFF;
4302 break;
4303 case MII_ADVERTISE: /* Advertisement control reg */
4304 rc = ADVERTISE_ALL;
4305 break;
4306 case MII_LPA: /* Link partner ability reg */
4307 rc = LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL |
4308 LPA_100BASE4 | LPA_LPACK;
4309 break;
4310 case MII_EXPANSION: /* Expansion register */
4311 break;
4312 case MII_DCOUNTER: /* disconnect counter */
4313 break;
4314 case MII_FCSCOUNTER: /* false carrier counter */
4315 break;
4316 case MII_NWAYTEST: /* N-way auto-neg test register */
4317 break;
4318 case MII_RERRCOUNTER: /* rx error counter */
4319 rc = card->stats.rx_errors;
4320 break;
4321 case MII_SREVISION: /* silicon revision */
4322 break;
4323 case MII_RESV1: /* reserved 1 */
4324 break;
4325 case MII_LBRERROR: /* loopback, rx, bypass error */
4326 break;
4327 case MII_PHYADDR: /* physical address */
4328 break;
4329 case MII_RESV2: /* reserved 2 */
4330 break;
4331 case MII_TPISTATUS: /* TPI status for 10mbps */
4332 break;
4333 case MII_NCONFIG: /* network interface config */
4334 break;
4335 default:
4336 break;
4337 }
4338 return rc;
4339 }
4340
qeth_snmp_command_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)4341 static int qeth_snmp_command_cb(struct qeth_card *card,
4342 struct qeth_reply *reply, unsigned long data)
4343 {
4344 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4345 struct qeth_arp_query_info *qinfo = reply->param;
4346 struct qeth_ipacmd_setadpparms *adp_cmd;
4347 unsigned int data_len;
4348 void *snmp_data;
4349
4350 QETH_CARD_TEXT(card, 3, "snpcmdcb");
4351
4352 if (cmd->hdr.return_code) {
4353 QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code);
4354 return -EIO;
4355 }
4356 if (cmd->data.setadapterparms.hdr.return_code) {
4357 cmd->hdr.return_code =
4358 cmd->data.setadapterparms.hdr.return_code;
4359 QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code);
4360 return -EIO;
4361 }
4362
4363 adp_cmd = &cmd->data.setadapterparms;
4364 data_len = adp_cmd->hdr.cmdlength - sizeof(adp_cmd->hdr);
4365 if (adp_cmd->hdr.seq_no == 1) {
4366 snmp_data = &adp_cmd->data.snmp;
4367 } else {
4368 snmp_data = &adp_cmd->data.snmp.request;
4369 data_len -= offsetof(struct qeth_snmp_cmd, request);
4370 }
4371
4372 /* check if there is enough room in userspace */
4373 if ((qinfo->udata_len - qinfo->udata_offset) < data_len) {
4374 QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOSPC);
4375 return -ENOSPC;
4376 }
4377 QETH_CARD_TEXT_(card, 4, "snore%i",
4378 cmd->data.setadapterparms.hdr.used_total);
4379 QETH_CARD_TEXT_(card, 4, "sseqn%i",
4380 cmd->data.setadapterparms.hdr.seq_no);
4381 /*copy entries to user buffer*/
4382 memcpy(qinfo->udata + qinfo->udata_offset, snmp_data, data_len);
4383 qinfo->udata_offset += data_len;
4384
4385 if (cmd->data.setadapterparms.hdr.seq_no <
4386 cmd->data.setadapterparms.hdr.used_total)
4387 return 1;
4388 return 0;
4389 }
4390
qeth_snmp_command(struct qeth_card * card,char __user * udata)4391 static int qeth_snmp_command(struct qeth_card *card, char __user *udata)
4392 {
4393 struct qeth_snmp_ureq __user *ureq;
4394 struct qeth_cmd_buffer *iob;
4395 unsigned int req_len;
4396 struct qeth_arp_query_info qinfo = {0, };
4397 int rc = 0;
4398
4399 QETH_CARD_TEXT(card, 3, "snmpcmd");
4400
4401 if (IS_VM_NIC(card))
4402 return -EOPNOTSUPP;
4403
4404 if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) &&
4405 IS_LAYER3(card))
4406 return -EOPNOTSUPP;
4407
4408 ureq = (struct qeth_snmp_ureq __user *) udata;
4409 if (get_user(qinfo.udata_len, &ureq->hdr.data_len) ||
4410 get_user(req_len, &ureq->hdr.req_len))
4411 return -EFAULT;
4412
4413 /* Sanitize user input, to avoid overflows in iob size calculation: */
4414 if (req_len > QETH_BUFSIZE)
4415 return -EINVAL;
4416
4417 iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL, req_len);
4418 if (!iob)
4419 return -ENOMEM;
4420
4421 if (copy_from_user(&__ipa_cmd(iob)->data.setadapterparms.data.snmp,
4422 &ureq->cmd, req_len)) {
4423 qeth_put_cmd(iob);
4424 return -EFAULT;
4425 }
4426
4427 qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
4428 if (!qinfo.udata) {
4429 qeth_put_cmd(iob);
4430 return -ENOMEM;
4431 }
4432 qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr);
4433
4434 rc = qeth_send_ipa_cmd(card, iob, qeth_snmp_command_cb, &qinfo);
4435 if (rc)
4436 QETH_DBF_MESSAGE(2, "SNMP command failed on device %x: (%#x)\n",
4437 CARD_DEVID(card), rc);
4438 else {
4439 if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
4440 rc = -EFAULT;
4441 }
4442
4443 kfree(qinfo.udata);
4444 return rc;
4445 }
4446
qeth_setadpparms_query_oat_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)4447 static int qeth_setadpparms_query_oat_cb(struct qeth_card *card,
4448 struct qeth_reply *reply, unsigned long data)
4449 {
4450 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4451 struct qeth_qoat_priv *priv;
4452 char *resdata;
4453 int resdatalen;
4454
4455 QETH_CARD_TEXT(card, 3, "qoatcb");
4456 if (qeth_setadpparms_inspect_rc(cmd))
4457 return -EIO;
4458
4459 priv = (struct qeth_qoat_priv *)reply->param;
4460 resdatalen = cmd->data.setadapterparms.hdr.cmdlength;
4461 resdata = (char *)data + 28;
4462
4463 if (resdatalen > (priv->buffer_len - priv->response_len))
4464 return -ENOSPC;
4465
4466 memcpy((priv->buffer + priv->response_len), resdata,
4467 resdatalen);
4468 priv->response_len += resdatalen;
4469
4470 if (cmd->data.setadapterparms.hdr.seq_no <
4471 cmd->data.setadapterparms.hdr.used_total)
4472 return 1;
4473 return 0;
4474 }
4475
qeth_query_oat_command(struct qeth_card * card,char __user * udata)4476 static int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
4477 {
4478 int rc = 0;
4479 struct qeth_cmd_buffer *iob;
4480 struct qeth_ipa_cmd *cmd;
4481 struct qeth_query_oat *oat_req;
4482 struct qeth_query_oat_data oat_data;
4483 struct qeth_qoat_priv priv;
4484 void __user *tmp;
4485
4486 QETH_CARD_TEXT(card, 3, "qoatcmd");
4487
4488 if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT)) {
4489 rc = -EOPNOTSUPP;
4490 goto out;
4491 }
4492
4493 if (copy_from_user(&oat_data, udata,
4494 sizeof(struct qeth_query_oat_data))) {
4495 rc = -EFAULT;
4496 goto out;
4497 }
4498
4499 priv.buffer_len = oat_data.buffer_len;
4500 priv.response_len = 0;
4501 priv.buffer = vzalloc(oat_data.buffer_len);
4502 if (!priv.buffer) {
4503 rc = -ENOMEM;
4504 goto out;
4505 }
4506
4507 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4508 SETADP_DATA_SIZEOF(query_oat));
4509 if (!iob) {
4510 rc = -ENOMEM;
4511 goto out_free;
4512 }
4513 cmd = __ipa_cmd(iob);
4514 oat_req = &cmd->data.setadapterparms.data.query_oat;
4515 oat_req->subcmd_code = oat_data.command;
4516
4517 rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb,
4518 &priv);
4519 if (!rc) {
4520 if (is_compat_task())
4521 tmp = compat_ptr(oat_data.ptr);
4522 else
4523 tmp = (void __user *)(unsigned long)oat_data.ptr;
4524
4525 if (copy_to_user(tmp, priv.buffer,
4526 priv.response_len)) {
4527 rc = -EFAULT;
4528 goto out_free;
4529 }
4530
4531 oat_data.response_len = priv.response_len;
4532
4533 if (copy_to_user(udata, &oat_data,
4534 sizeof(struct qeth_query_oat_data)))
4535 rc = -EFAULT;
4536 }
4537
4538 out_free:
4539 vfree(priv.buffer);
4540 out:
4541 return rc;
4542 }
4543
qeth_query_card_info_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)4544 static int qeth_query_card_info_cb(struct qeth_card *card,
4545 struct qeth_reply *reply, unsigned long data)
4546 {
4547 struct carrier_info *carrier_info = (struct carrier_info *)reply->param;
4548 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4549 struct qeth_query_card_info *card_info;
4550
4551 QETH_CARD_TEXT(card, 2, "qcrdincb");
4552 if (qeth_setadpparms_inspect_rc(cmd))
4553 return -EIO;
4554
4555 card_info = &cmd->data.setadapterparms.data.card_info;
4556 carrier_info->card_type = card_info->card_type;
4557 carrier_info->port_mode = card_info->port_mode;
4558 carrier_info->port_speed = card_info->port_speed;
4559 return 0;
4560 }
4561
qeth_query_card_info(struct qeth_card * card,struct carrier_info * carrier_info)4562 int qeth_query_card_info(struct qeth_card *card,
4563 struct carrier_info *carrier_info)
4564 {
4565 struct qeth_cmd_buffer *iob;
4566
4567 QETH_CARD_TEXT(card, 2, "qcrdinfo");
4568 if (!qeth_adp_supported(card, IPA_SETADP_QUERY_CARD_INFO))
4569 return -EOPNOTSUPP;
4570 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_CARD_INFO, 0);
4571 if (!iob)
4572 return -ENOMEM;
4573 return qeth_send_ipa_cmd(card, iob, qeth_query_card_info_cb,
4574 (void *)carrier_info);
4575 }
4576
4577 /**
4578 * qeth_vm_request_mac() - Request a hypervisor-managed MAC address
4579 * @card: pointer to a qeth_card
4580 *
4581 * Returns
4582 * 0, if a MAC address has been set for the card's netdevice
4583 * a return code, for various error conditions
4584 */
qeth_vm_request_mac(struct qeth_card * card)4585 int qeth_vm_request_mac(struct qeth_card *card)
4586 {
4587 struct diag26c_mac_resp *response;
4588 struct diag26c_mac_req *request;
4589 struct ccw_dev_id id;
4590 int rc;
4591
4592 QETH_CARD_TEXT(card, 2, "vmreqmac");
4593
4594 request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
4595 response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
4596 if (!request || !response) {
4597 rc = -ENOMEM;
4598 goto out;
4599 }
4600
4601 ccw_device_get_id(CARD_DDEV(card), &id);
4602 request->resp_buf_len = sizeof(*response);
4603 request->resp_version = DIAG26C_VERSION2;
4604 request->op_code = DIAG26C_GET_MAC;
4605 request->devno = id.devno;
4606
4607 QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4608 rc = diag26c(request, response, DIAG26C_MAC_SERVICES);
4609 QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4610 if (rc)
4611 goto out;
4612 QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
4613
4614 if (request->resp_buf_len < sizeof(*response) ||
4615 response->version != request->resp_version) {
4616 rc = -EIO;
4617 QETH_CARD_TEXT(card, 2, "badresp");
4618 QETH_CARD_HEX(card, 2, &request->resp_buf_len,
4619 sizeof(request->resp_buf_len));
4620 } else if (!is_valid_ether_addr(response->mac)) {
4621 rc = -EINVAL;
4622 QETH_CARD_TEXT(card, 2, "badmac");
4623 QETH_CARD_HEX(card, 2, response->mac, ETH_ALEN);
4624 } else {
4625 ether_addr_copy(card->dev->dev_addr, response->mac);
4626 }
4627
4628 out:
4629 kfree(response);
4630 kfree(request);
4631 return rc;
4632 }
4633 EXPORT_SYMBOL_GPL(qeth_vm_request_mac);
4634
qeth_determine_capabilities(struct qeth_card * card)4635 static void qeth_determine_capabilities(struct qeth_card *card)
4636 {
4637 int rc;
4638 struct ccw_device *ddev;
4639 int ddev_offline = 0;
4640
4641 QETH_CARD_TEXT(card, 2, "detcapab");
4642 ddev = CARD_DDEV(card);
4643 if (!ddev->online) {
4644 ddev_offline = 1;
4645 rc = ccw_device_set_online(ddev);
4646 if (rc) {
4647 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
4648 goto out;
4649 }
4650 }
4651
4652 rc = qeth_read_conf_data(card);
4653 if (rc) {
4654 QETH_DBF_MESSAGE(2, "qeth_read_conf_data on device %x returned %i\n",
4655 CARD_DEVID(card), rc);
4656 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
4657 goto out_offline;
4658 }
4659
4660 rc = qdio_get_ssqd_desc(ddev, &card->ssqd);
4661 if (rc)
4662 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
4663
4664 QETH_CARD_TEXT_(card, 2, "qfmt%d", card->ssqd.qfmt);
4665 QETH_CARD_TEXT_(card, 2, "ac1:%02x", card->ssqd.qdioac1);
4666 QETH_CARD_TEXT_(card, 2, "ac2:%04x", card->ssqd.qdioac2);
4667 QETH_CARD_TEXT_(card, 2, "ac3:%04x", card->ssqd.qdioac3);
4668 QETH_CARD_TEXT_(card, 2, "icnt%d", card->ssqd.icnt);
4669 if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) ||
4670 ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) ||
4671 ((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) {
4672 dev_info(&card->gdev->dev,
4673 "Completion Queueing supported\n");
4674 } else {
4675 card->options.cq = QETH_CQ_NOTAVAILABLE;
4676 }
4677
4678
4679 out_offline:
4680 if (ddev_offline == 1)
4681 ccw_device_set_offline(ddev);
4682 out:
4683 return;
4684 }
4685
qeth_qdio_establish_cq(struct qeth_card * card,struct qdio_buffer ** in_sbal_ptrs,void (** queue_start_poll)(struct ccw_device *,int,unsigned long))4686 static void qeth_qdio_establish_cq(struct qeth_card *card,
4687 struct qdio_buffer **in_sbal_ptrs,
4688 void (**queue_start_poll)
4689 (struct ccw_device *, int,
4690 unsigned long))
4691 {
4692 int i;
4693
4694 if (card->options.cq == QETH_CQ_ENABLED) {
4695 int offset = QDIO_MAX_BUFFERS_PER_Q *
4696 (card->qdio.no_in_queues - 1);
4697 for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i) {
4698 in_sbal_ptrs[offset + i] = (struct qdio_buffer *)
4699 virt_to_phys(card->qdio.c_q->bufs[i].buffer);
4700 }
4701
4702 queue_start_poll[card->qdio.no_in_queues - 1] = NULL;
4703 }
4704 }
4705
qeth_qdio_establish(struct qeth_card * card)4706 static int qeth_qdio_establish(struct qeth_card *card)
4707 {
4708 struct qdio_initialize init_data;
4709 char *qib_param_field;
4710 struct qdio_buffer **in_sbal_ptrs;
4711 void (**queue_start_poll) (struct ccw_device *, int, unsigned long);
4712 struct qdio_buffer **out_sbal_ptrs;
4713 int i, j, k;
4714 int rc = 0;
4715
4716 QETH_CARD_TEXT(card, 2, "qdioest");
4717
4718 qib_param_field = kzalloc(FIELD_SIZEOF(struct qib, parm), GFP_KERNEL);
4719 if (!qib_param_field) {
4720 rc = -ENOMEM;
4721 goto out_free_nothing;
4722 }
4723
4724 qeth_create_qib_param_field(card, qib_param_field);
4725 qeth_create_qib_param_field_blkt(card, qib_param_field);
4726
4727 in_sbal_ptrs = kcalloc(card->qdio.no_in_queues * QDIO_MAX_BUFFERS_PER_Q,
4728 sizeof(void *),
4729 GFP_KERNEL);
4730 if (!in_sbal_ptrs) {
4731 rc = -ENOMEM;
4732 goto out_free_qib_param;
4733 }
4734 for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i) {
4735 in_sbal_ptrs[i] = (struct qdio_buffer *)
4736 virt_to_phys(card->qdio.in_q->bufs[i].buffer);
4737 }
4738
4739 queue_start_poll = kcalloc(card->qdio.no_in_queues, sizeof(void *),
4740 GFP_KERNEL);
4741 if (!queue_start_poll) {
4742 rc = -ENOMEM;
4743 goto out_free_in_sbals;
4744 }
4745 for (i = 0; i < card->qdio.no_in_queues; ++i)
4746 queue_start_poll[i] = qeth_qdio_start_poll;
4747
4748 qeth_qdio_establish_cq(card, in_sbal_ptrs, queue_start_poll);
4749
4750 out_sbal_ptrs =
4751 kcalloc(card->qdio.no_out_queues * QDIO_MAX_BUFFERS_PER_Q,
4752 sizeof(void *),
4753 GFP_KERNEL);
4754 if (!out_sbal_ptrs) {
4755 rc = -ENOMEM;
4756 goto out_free_queue_start_poll;
4757 }
4758 for (i = 0, k = 0; i < card->qdio.no_out_queues; ++i)
4759 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j, ++k) {
4760 out_sbal_ptrs[k] = (struct qdio_buffer *)virt_to_phys(
4761 card->qdio.out_qs[i]->bufs[j]->buffer);
4762 }
4763
4764 memset(&init_data, 0, sizeof(struct qdio_initialize));
4765 init_data.cdev = CARD_DDEV(card);
4766 init_data.q_format = IS_IQD(card) ? QDIO_IQDIO_QFMT :
4767 QDIO_QETH_QFMT;
4768 init_data.qib_param_field_format = 0;
4769 init_data.qib_param_field = qib_param_field;
4770 init_data.no_input_qs = card->qdio.no_in_queues;
4771 init_data.no_output_qs = card->qdio.no_out_queues;
4772 init_data.input_handler = qeth_qdio_input_handler;
4773 init_data.output_handler = qeth_qdio_output_handler;
4774 init_data.queue_start_poll_array = queue_start_poll;
4775 init_data.int_parm = (unsigned long) card;
4776 init_data.input_sbal_addr_array = in_sbal_ptrs;
4777 init_data.output_sbal_addr_array = out_sbal_ptrs;
4778 init_data.output_sbal_state_array = card->qdio.out_bufstates;
4779 init_data.scan_threshold = IS_IQD(card) ? 0 : 32;
4780
4781 if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED,
4782 QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) {
4783 rc = qdio_allocate(&init_data);
4784 if (rc) {
4785 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
4786 goto out;
4787 }
4788 rc = qdio_establish(&init_data);
4789 if (rc) {
4790 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
4791 qdio_free(CARD_DDEV(card));
4792 }
4793 }
4794
4795 switch (card->options.cq) {
4796 case QETH_CQ_ENABLED:
4797 dev_info(&card->gdev->dev, "Completion Queue support enabled");
4798 break;
4799 case QETH_CQ_DISABLED:
4800 dev_info(&card->gdev->dev, "Completion Queue support disabled");
4801 break;
4802 default:
4803 break;
4804 }
4805 out:
4806 kfree(out_sbal_ptrs);
4807 out_free_queue_start_poll:
4808 kfree(queue_start_poll);
4809 out_free_in_sbals:
4810 kfree(in_sbal_ptrs);
4811 out_free_qib_param:
4812 kfree(qib_param_field);
4813 out_free_nothing:
4814 return rc;
4815 }
4816
qeth_core_free_card(struct qeth_card * card)4817 static void qeth_core_free_card(struct qeth_card *card)
4818 {
4819 QETH_CARD_TEXT(card, 2, "freecrd");
4820 qeth_clean_channel(&card->read);
4821 qeth_clean_channel(&card->write);
4822 qeth_clean_channel(&card->data);
4823 qeth_put_cmd(card->read_cmd);
4824 destroy_workqueue(card->event_wq);
4825 qeth_free_qdio_queues(card);
4826 unregister_service_level(&card->qeth_service_level);
4827 dev_set_drvdata(&card->gdev->dev, NULL);
4828 kfree(card);
4829 }
4830
qeth_trace_features(struct qeth_card * card)4831 void qeth_trace_features(struct qeth_card *card)
4832 {
4833 QETH_CARD_TEXT(card, 2, "features");
4834 QETH_CARD_HEX(card, 2, &card->options.ipa4, sizeof(card->options.ipa4));
4835 QETH_CARD_HEX(card, 2, &card->options.ipa6, sizeof(card->options.ipa6));
4836 QETH_CARD_HEX(card, 2, &card->options.adp, sizeof(card->options.adp));
4837 QETH_CARD_HEX(card, 2, &card->info.diagass_support,
4838 sizeof(card->info.diagass_support));
4839 }
4840 EXPORT_SYMBOL_GPL(qeth_trace_features);
4841
4842 static struct ccw_device_id qeth_ids[] = {
4843 {CCW_DEVICE_DEVTYPE(0x1731, 0x01, 0x1732, 0x01),
4844 .driver_info = QETH_CARD_TYPE_OSD},
4845 {CCW_DEVICE_DEVTYPE(0x1731, 0x05, 0x1732, 0x05),
4846 .driver_info = QETH_CARD_TYPE_IQD},
4847 {CCW_DEVICE_DEVTYPE(0x1731, 0x06, 0x1732, 0x06),
4848 .driver_info = QETH_CARD_TYPE_OSN},
4849 {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x03),
4850 .driver_info = QETH_CARD_TYPE_OSM},
4851 {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02),
4852 .driver_info = QETH_CARD_TYPE_OSX},
4853 {},
4854 };
4855 MODULE_DEVICE_TABLE(ccw, qeth_ids);
4856
4857 static struct ccw_driver qeth_ccw_driver = {
4858 .driver = {
4859 .owner = THIS_MODULE,
4860 .name = "qeth",
4861 },
4862 .ids = qeth_ids,
4863 .probe = ccwgroup_probe_ccwdev,
4864 .remove = ccwgroup_remove_ccwdev,
4865 };
4866
qeth_core_hardsetup_card(struct qeth_card * card,bool * carrier_ok)4867 int qeth_core_hardsetup_card(struct qeth_card *card, bool *carrier_ok)
4868 {
4869 int retries = 3;
4870 int rc;
4871
4872 QETH_CARD_TEXT(card, 2, "hrdsetup");
4873 atomic_set(&card->force_alloc_skb, 0);
4874 rc = qeth_update_from_chp_desc(card);
4875 if (rc)
4876 return rc;
4877 retry:
4878 if (retries < 3)
4879 QETH_DBF_MESSAGE(2, "Retrying to do IDX activates on device %x.\n",
4880 CARD_DEVID(card));
4881 rc = qeth_qdio_clear_card(card, !IS_IQD(card));
4882 ccw_device_set_offline(CARD_DDEV(card));
4883 ccw_device_set_offline(CARD_WDEV(card));
4884 ccw_device_set_offline(CARD_RDEV(card));
4885 qdio_free(CARD_DDEV(card));
4886 rc = ccw_device_set_online(CARD_RDEV(card));
4887 if (rc)
4888 goto retriable;
4889 rc = ccw_device_set_online(CARD_WDEV(card));
4890 if (rc)
4891 goto retriable;
4892 rc = ccw_device_set_online(CARD_DDEV(card));
4893 if (rc)
4894 goto retriable;
4895 retriable:
4896 if (rc == -ERESTARTSYS) {
4897 QETH_CARD_TEXT(card, 2, "break1");
4898 return rc;
4899 } else if (rc) {
4900 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
4901 if (--retries < 0)
4902 goto out;
4903 else
4904 goto retry;
4905 }
4906 qeth_determine_capabilities(card);
4907 qeth_init_tokens(card);
4908 qeth_init_func_level(card);
4909
4910 rc = qeth_idx_activate_read_channel(card);
4911 if (rc == -EINTR) {
4912 QETH_CARD_TEXT(card, 2, "break2");
4913 return rc;
4914 } else if (rc) {
4915 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
4916 if (--retries < 0)
4917 goto out;
4918 else
4919 goto retry;
4920 }
4921
4922 rc = qeth_idx_activate_write_channel(card);
4923 if (rc == -EINTR) {
4924 QETH_CARD_TEXT(card, 2, "break3");
4925 return rc;
4926 } else if (rc) {
4927 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
4928 if (--retries < 0)
4929 goto out;
4930 else
4931 goto retry;
4932 }
4933 card->read_or_write_problem = 0;
4934 rc = qeth_mpc_initialize(card);
4935 if (rc) {
4936 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
4937 goto out;
4938 }
4939
4940 rc = qeth_send_startlan(card);
4941 if (rc) {
4942 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
4943 if (rc == -ENETDOWN) {
4944 dev_warn(&card->gdev->dev, "The LAN is offline\n");
4945 *carrier_ok = false;
4946 } else {
4947 goto out;
4948 }
4949 } else {
4950 *carrier_ok = true;
4951 }
4952
4953 card->options.ipa4.supported_funcs = 0;
4954 card->options.ipa6.supported_funcs = 0;
4955 card->options.adp.supported_funcs = 0;
4956 card->options.sbp.supported_funcs = 0;
4957 card->info.diagass_support = 0;
4958 rc = qeth_query_ipassists(card, QETH_PROT_IPV4);
4959 if (rc == -ENOMEM)
4960 goto out;
4961 if (qeth_is_supported(card, IPA_IPV6)) {
4962 rc = qeth_query_ipassists(card, QETH_PROT_IPV6);
4963 if (rc == -ENOMEM)
4964 goto out;
4965 }
4966 if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
4967 rc = qeth_query_setadapterparms(card);
4968 if (rc < 0) {
4969 QETH_CARD_TEXT_(card, 2, "7err%d", rc);
4970 goto out;
4971 }
4972 }
4973 if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
4974 rc = qeth_query_setdiagass(card);
4975 if (rc < 0) {
4976 QETH_CARD_TEXT_(card, 2, "8err%d", rc);
4977 goto out;
4978 }
4979 }
4980 return 0;
4981 out:
4982 dev_warn(&card->gdev->dev, "The qeth device driver failed to recover "
4983 "an error on the device\n");
4984 QETH_DBF_MESSAGE(2, "Initialization for device %x failed in hardsetup! rc=%d\n",
4985 CARD_DEVID(card), rc);
4986 return rc;
4987 }
4988 EXPORT_SYMBOL_GPL(qeth_core_hardsetup_card);
4989
qeth_create_skb_frag(struct qdio_buffer_element * element,struct sk_buff * skb,int offset,int data_len)4990 static void qeth_create_skb_frag(struct qdio_buffer_element *element,
4991 struct sk_buff *skb, int offset, int data_len)
4992 {
4993 struct page *page = virt_to_page(element->addr);
4994 unsigned int next_frag;
4995
4996 /* first fill the linear space */
4997 if (!skb->len) {
4998 unsigned int linear = min(data_len, skb_tailroom(skb));
4999
5000 skb_put_data(skb, element->addr + offset, linear);
5001 data_len -= linear;
5002 if (!data_len)
5003 return;
5004 offset += linear;
5005 /* fall through to add page frag for remaining data */
5006 }
5007
5008 next_frag = skb_shinfo(skb)->nr_frags;
5009 get_page(page);
5010 skb_add_rx_frag(skb, next_frag, page, offset, data_len, data_len);
5011 }
5012
qeth_is_last_sbale(struct qdio_buffer_element * sbale)5013 static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale)
5014 {
5015 return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY);
5016 }
5017
qeth_core_get_next_skb(struct qeth_card * card,struct qeth_qdio_buffer * qethbuffer,struct qdio_buffer_element ** __element,int * __offset,struct qeth_hdr ** hdr)5018 struct sk_buff *qeth_core_get_next_skb(struct qeth_card *card,
5019 struct qeth_qdio_buffer *qethbuffer,
5020 struct qdio_buffer_element **__element, int *__offset,
5021 struct qeth_hdr **hdr)
5022 {
5023 struct qdio_buffer_element *element = *__element;
5024 struct qdio_buffer *buffer = qethbuffer->buffer;
5025 int offset = *__offset;
5026 struct sk_buff *skb;
5027 int skb_len = 0;
5028 void *data_ptr;
5029 int data_len;
5030 int headroom = 0;
5031 int use_rx_sg = 0;
5032
5033 /* qeth_hdr must not cross element boundaries */
5034 while (element->length < offset + sizeof(struct qeth_hdr)) {
5035 if (qeth_is_last_sbale(element))
5036 return NULL;
5037 element++;
5038 offset = 0;
5039 }
5040 *hdr = element->addr + offset;
5041
5042 offset += sizeof(struct qeth_hdr);
5043 switch ((*hdr)->hdr.l2.id) {
5044 case QETH_HEADER_TYPE_LAYER2:
5045 skb_len = (*hdr)->hdr.l2.pkt_length;
5046 break;
5047 case QETH_HEADER_TYPE_LAYER3:
5048 skb_len = (*hdr)->hdr.l3.length;
5049 headroom = ETH_HLEN;
5050 break;
5051 case QETH_HEADER_TYPE_OSN:
5052 skb_len = (*hdr)->hdr.osn.pdu_length;
5053 headroom = sizeof(struct qeth_hdr);
5054 break;
5055 default:
5056 break;
5057 }
5058
5059 if (!skb_len)
5060 return NULL;
5061
5062 if (((skb_len >= card->options.rx_sg_cb) &&
5063 !IS_OSN(card) &&
5064 (!atomic_read(&card->force_alloc_skb))) ||
5065 (card->options.cq == QETH_CQ_ENABLED))
5066 use_rx_sg = 1;
5067
5068 if (use_rx_sg && qethbuffer->rx_skb) {
5069 /* QETH_CQ_ENABLED only: */
5070 skb = qethbuffer->rx_skb;
5071 qethbuffer->rx_skb = NULL;
5072 } else {
5073 unsigned int linear = (use_rx_sg) ? QETH_RX_PULL_LEN : skb_len;
5074
5075 skb = napi_alloc_skb(&card->napi, linear + headroom);
5076 }
5077 if (!skb)
5078 goto no_mem;
5079 if (headroom)
5080 skb_reserve(skb, headroom);
5081
5082 data_ptr = element->addr + offset;
5083 while (skb_len) {
5084 data_len = min(skb_len, (int)(element->length - offset));
5085 if (data_len) {
5086 if (use_rx_sg)
5087 qeth_create_skb_frag(element, skb, offset,
5088 data_len);
5089 else
5090 skb_put_data(skb, data_ptr, data_len);
5091 }
5092 skb_len -= data_len;
5093 if (skb_len) {
5094 if (qeth_is_last_sbale(element)) {
5095 QETH_CARD_TEXT(card, 4, "unexeob");
5096 QETH_CARD_HEX(card, 2, buffer, sizeof(void *));
5097 dev_kfree_skb_any(skb);
5098 QETH_CARD_STAT_INC(card, rx_errors);
5099 return NULL;
5100 }
5101 element++;
5102 offset = 0;
5103 data_ptr = element->addr;
5104 } else {
5105 offset += data_len;
5106 }
5107 }
5108 *__element = element;
5109 *__offset = offset;
5110 if (use_rx_sg) {
5111 QETH_CARD_STAT_INC(card, rx_sg_skbs);
5112 QETH_CARD_STAT_ADD(card, rx_sg_frags,
5113 skb_shinfo(skb)->nr_frags);
5114 }
5115 return skb;
5116 no_mem:
5117 if (net_ratelimit()) {
5118 QETH_CARD_TEXT(card, 2, "noskbmem");
5119 }
5120 QETH_CARD_STAT_INC(card, rx_dropped);
5121 return NULL;
5122 }
5123 EXPORT_SYMBOL_GPL(qeth_core_get_next_skb);
5124
qeth_poll(struct napi_struct * napi,int budget)5125 int qeth_poll(struct napi_struct *napi, int budget)
5126 {
5127 struct qeth_card *card = container_of(napi, struct qeth_card, napi);
5128 int work_done = 0;
5129 struct qeth_qdio_buffer *buffer;
5130 int done;
5131 int new_budget = budget;
5132
5133 while (1) {
5134 if (!card->rx.b_count) {
5135 card->rx.qdio_err = 0;
5136 card->rx.b_count = qdio_get_next_buffers(
5137 card->data.ccwdev, 0, &card->rx.b_index,
5138 &card->rx.qdio_err);
5139 if (card->rx.b_count <= 0) {
5140 card->rx.b_count = 0;
5141 break;
5142 }
5143 card->rx.b_element =
5144 &card->qdio.in_q->bufs[card->rx.b_index]
5145 .buffer->element[0];
5146 card->rx.e_offset = 0;
5147 }
5148
5149 while (card->rx.b_count) {
5150 buffer = &card->qdio.in_q->bufs[card->rx.b_index];
5151 if (!(card->rx.qdio_err &&
5152 qeth_check_qdio_errors(card, buffer->buffer,
5153 card->rx.qdio_err, "qinerr")))
5154 work_done +=
5155 card->discipline->process_rx_buffer(
5156 card, new_budget, &done);
5157 else
5158 done = 1;
5159
5160 if (done) {
5161 QETH_CARD_STAT_INC(card, rx_bufs);
5162 qeth_put_buffer_pool_entry(card,
5163 buffer->pool_entry);
5164 qeth_queue_input_buffer(card, card->rx.b_index);
5165 card->rx.b_count--;
5166 if (card->rx.b_count) {
5167 card->rx.b_index =
5168 (card->rx.b_index + 1) %
5169 QDIO_MAX_BUFFERS_PER_Q;
5170 card->rx.b_element =
5171 &card->qdio.in_q
5172 ->bufs[card->rx.b_index]
5173 .buffer->element[0];
5174 card->rx.e_offset = 0;
5175 }
5176 }
5177
5178 if (work_done >= budget)
5179 goto out;
5180 else
5181 new_budget = budget - work_done;
5182 }
5183 }
5184
5185 napi_complete_done(napi, work_done);
5186 if (qdio_start_irq(card->data.ccwdev, 0))
5187 napi_schedule(&card->napi);
5188 out:
5189 return work_done;
5190 }
5191 EXPORT_SYMBOL_GPL(qeth_poll);
5192
qeth_iqd_tx_complete(struct qeth_qdio_out_q * queue,unsigned int bidx,bool error,int budget)5193 static void qeth_iqd_tx_complete(struct qeth_qdio_out_q *queue,
5194 unsigned int bidx, bool error, int budget)
5195 {
5196 struct qeth_qdio_out_buffer *buffer = queue->bufs[bidx];
5197 u8 sflags = buffer->buffer->element[15].sflags;
5198 struct qeth_card *card = queue->card;
5199
5200 if (queue->bufstates && (queue->bufstates[bidx].flags &
5201 QDIO_OUTBUF_STATE_FLAG_PENDING)) {
5202 WARN_ON_ONCE(card->options.cq != QETH_CQ_ENABLED);
5203
5204 if (atomic_cmpxchg(&buffer->state, QETH_QDIO_BUF_PRIMED,
5205 QETH_QDIO_BUF_PENDING) ==
5206 QETH_QDIO_BUF_PRIMED)
5207 qeth_notify_skbs(queue, buffer, TX_NOTIFY_PENDING);
5208
5209 QETH_CARD_TEXT_(card, 5, "pel%u", bidx);
5210
5211 /* prepare the queue slot for re-use: */
5212 qeth_scrub_qdio_buffer(buffer->buffer, queue->max_elements);
5213 if (qeth_init_qdio_out_buf(queue, bidx)) {
5214 QETH_CARD_TEXT(card, 2, "outofbuf");
5215 qeth_schedule_recovery(card);
5216 }
5217
5218 return;
5219 }
5220
5221 if (card->options.cq == QETH_CQ_ENABLED)
5222 qeth_notify_skbs(queue, buffer,
5223 qeth_compute_cq_notification(sflags, 0));
5224 qeth_clear_output_buffer(queue, buffer, error, budget);
5225 }
5226
qeth_tx_poll(struct napi_struct * napi,int budget)5227 static int qeth_tx_poll(struct napi_struct *napi, int budget)
5228 {
5229 struct qeth_qdio_out_q *queue = qeth_napi_to_out_queue(napi);
5230 unsigned int queue_no = queue->queue_no;
5231 struct qeth_card *card = queue->card;
5232 struct net_device *dev = card->dev;
5233 unsigned int work_done = 0;
5234 struct netdev_queue *txq;
5235
5236 txq = netdev_get_tx_queue(dev, qeth_iqd_translate_txq(dev, queue_no));
5237
5238 while (1) {
5239 unsigned int start, error, i;
5240 unsigned int packets = 0;
5241 unsigned int bytes = 0;
5242 int completed;
5243
5244 if (qeth_out_queue_is_empty(queue)) {
5245 napi_complete(napi);
5246 return 0;
5247 }
5248
5249 /* Give the CPU a breather: */
5250 if (work_done >= QDIO_MAX_BUFFERS_PER_Q) {
5251 QETH_TXQ_STAT_INC(queue, completion_yield);
5252 if (napi_complete_done(napi, 0))
5253 napi_schedule(napi);
5254 return 0;
5255 }
5256
5257 completed = qdio_inspect_queue(CARD_DDEV(card), queue_no, false,
5258 &start, &error);
5259 if (completed <= 0) {
5260 /* Ensure we see TX completion for pending work: */
5261 if (napi_complete_done(napi, 0))
5262 qeth_tx_arm_timer(queue);
5263 return 0;
5264 }
5265
5266 for (i = start; i < start + completed; i++) {
5267 struct qeth_qdio_out_buffer *buffer;
5268 unsigned int bidx = QDIO_BUFNR(i);
5269
5270 buffer = queue->bufs[bidx];
5271 packets += skb_queue_len(&buffer->skb_list);
5272 bytes += buffer->bytes;
5273
5274 qeth_handle_send_error(card, buffer, error);
5275 qeth_iqd_tx_complete(queue, bidx, error, budget);
5276 qeth_cleanup_handled_pending(queue, bidx, false);
5277 }
5278
5279 netdev_tx_completed_queue(txq, packets, bytes);
5280 atomic_sub(completed, &queue->used_buffers);
5281 work_done += completed;
5282
5283 /* xmit may have observed the full-condition, but not yet
5284 * stopped the txq. In which case the code below won't trigger.
5285 * So before returning, xmit will re-check the txq's fill level
5286 * and wake it up if needed.
5287 */
5288 if (netif_tx_queue_stopped(txq) &&
5289 !qeth_out_queue_is_full(queue))
5290 netif_tx_wake_queue(txq);
5291 }
5292 }
5293
qeth_setassparms_inspect_rc(struct qeth_ipa_cmd * cmd)5294 static int qeth_setassparms_inspect_rc(struct qeth_ipa_cmd *cmd)
5295 {
5296 if (!cmd->hdr.return_code)
5297 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
5298 return cmd->hdr.return_code;
5299 }
5300
qeth_setassparms_get_caps_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)5301 static int qeth_setassparms_get_caps_cb(struct qeth_card *card,
5302 struct qeth_reply *reply,
5303 unsigned long data)
5304 {
5305 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5306 struct qeth_ipa_caps *caps = reply->param;
5307
5308 if (qeth_setassparms_inspect_rc(cmd))
5309 return -EIO;
5310
5311 caps->supported = cmd->data.setassparms.data.caps.supported;
5312 caps->enabled = cmd->data.setassparms.data.caps.enabled;
5313 return 0;
5314 }
5315
qeth_setassparms_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)5316 int qeth_setassparms_cb(struct qeth_card *card,
5317 struct qeth_reply *reply, unsigned long data)
5318 {
5319 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5320
5321 QETH_CARD_TEXT(card, 4, "defadpcb");
5322
5323 if (cmd->hdr.return_code)
5324 return -EIO;
5325
5326 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
5327 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
5328 card->options.ipa4.enabled_funcs = cmd->hdr.ipa_enabled;
5329 if (cmd->hdr.prot_version == QETH_PROT_IPV6)
5330 card->options.ipa6.enabled_funcs = cmd->hdr.ipa_enabled;
5331 return 0;
5332 }
5333 EXPORT_SYMBOL_GPL(qeth_setassparms_cb);
5334
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)5335 struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card,
5336 enum qeth_ipa_funcs ipa_func,
5337 u16 cmd_code,
5338 unsigned int data_length,
5339 enum qeth_prot_versions prot)
5340 {
5341 struct qeth_ipacmd_setassparms *setassparms;
5342 struct qeth_ipacmd_setassparms_hdr *hdr;
5343 struct qeth_cmd_buffer *iob;
5344
5345 QETH_CARD_TEXT(card, 4, "getasscm");
5346 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETASSPARMS, prot,
5347 data_length +
5348 offsetof(struct qeth_ipacmd_setassparms,
5349 data));
5350 if (!iob)
5351 return NULL;
5352
5353 setassparms = &__ipa_cmd(iob)->data.setassparms;
5354 setassparms->assist_no = ipa_func;
5355
5356 hdr = &setassparms->hdr;
5357 hdr->length = sizeof(*hdr) + data_length;
5358 hdr->command_code = cmd_code;
5359 return iob;
5360 }
5361 EXPORT_SYMBOL_GPL(qeth_get_setassparms_cmd);
5362
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)5363 int qeth_send_simple_setassparms_prot(struct qeth_card *card,
5364 enum qeth_ipa_funcs ipa_func,
5365 u16 cmd_code, u32 *data,
5366 enum qeth_prot_versions prot)
5367 {
5368 unsigned int length = data ? SETASS_DATA_SIZEOF(flags_32bit) : 0;
5369 struct qeth_cmd_buffer *iob;
5370
5371 QETH_CARD_TEXT_(card, 4, "simassp%i", prot);
5372 iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code, length, prot);
5373 if (!iob)
5374 return -ENOMEM;
5375
5376 if (data)
5377 __ipa_cmd(iob)->data.setassparms.data.flags_32bit = *data;
5378 return qeth_send_ipa_cmd(card, iob, qeth_setassparms_cb, NULL);
5379 }
5380 EXPORT_SYMBOL_GPL(qeth_send_simple_setassparms_prot);
5381
qeth_unregister_dbf_views(void)5382 static void qeth_unregister_dbf_views(void)
5383 {
5384 int x;
5385 for (x = 0; x < QETH_DBF_INFOS; x++) {
5386 debug_unregister(qeth_dbf[x].id);
5387 qeth_dbf[x].id = NULL;
5388 }
5389 }
5390
qeth_dbf_longtext(debug_info_t * id,int level,char * fmt,...)5391 void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...)
5392 {
5393 char dbf_txt_buf[32];
5394 va_list args;
5395
5396 if (!debug_level_enabled(id, level))
5397 return;
5398 va_start(args, fmt);
5399 vsnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
5400 va_end(args);
5401 debug_text_event(id, level, dbf_txt_buf);
5402 }
5403 EXPORT_SYMBOL_GPL(qeth_dbf_longtext);
5404
qeth_register_dbf_views(void)5405 static int qeth_register_dbf_views(void)
5406 {
5407 int ret;
5408 int x;
5409
5410 for (x = 0; x < QETH_DBF_INFOS; x++) {
5411 /* register the areas */
5412 qeth_dbf[x].id = debug_register(qeth_dbf[x].name,
5413 qeth_dbf[x].pages,
5414 qeth_dbf[x].areas,
5415 qeth_dbf[x].len);
5416 if (qeth_dbf[x].id == NULL) {
5417 qeth_unregister_dbf_views();
5418 return -ENOMEM;
5419 }
5420
5421 /* register a view */
5422 ret = debug_register_view(qeth_dbf[x].id, qeth_dbf[x].view);
5423 if (ret) {
5424 qeth_unregister_dbf_views();
5425 return ret;
5426 }
5427
5428 /* set a passing level */
5429 debug_set_level(qeth_dbf[x].id, qeth_dbf[x].level);
5430 }
5431
5432 return 0;
5433 }
5434
5435 static DEFINE_MUTEX(qeth_mod_mutex); /* for synchronized module loading */
5436
qeth_core_load_discipline(struct qeth_card * card,enum qeth_discipline_id discipline)5437 int qeth_core_load_discipline(struct qeth_card *card,
5438 enum qeth_discipline_id discipline)
5439 {
5440 mutex_lock(&qeth_mod_mutex);
5441 switch (discipline) {
5442 case QETH_DISCIPLINE_LAYER3:
5443 card->discipline = try_then_request_module(
5444 symbol_get(qeth_l3_discipline), "qeth_l3");
5445 break;
5446 case QETH_DISCIPLINE_LAYER2:
5447 card->discipline = try_then_request_module(
5448 symbol_get(qeth_l2_discipline), "qeth_l2");
5449 break;
5450 default:
5451 break;
5452 }
5453 mutex_unlock(&qeth_mod_mutex);
5454
5455 if (!card->discipline) {
5456 dev_err(&card->gdev->dev, "There is no kernel module to "
5457 "support discipline %d\n", discipline);
5458 return -EINVAL;
5459 }
5460
5461 card->options.layer = discipline;
5462 return 0;
5463 }
5464
qeth_core_free_discipline(struct qeth_card * card)5465 void qeth_core_free_discipline(struct qeth_card *card)
5466 {
5467 if (IS_LAYER2(card))
5468 symbol_put(qeth_l2_discipline);
5469 else
5470 symbol_put(qeth_l3_discipline);
5471 card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
5472 card->discipline = NULL;
5473 }
5474
5475 const struct device_type qeth_generic_devtype = {
5476 .name = "qeth_generic",
5477 .groups = qeth_generic_attr_groups,
5478 };
5479 EXPORT_SYMBOL_GPL(qeth_generic_devtype);
5480
5481 static const struct device_type qeth_osn_devtype = {
5482 .name = "qeth_osn",
5483 .groups = qeth_osn_attr_groups,
5484 };
5485
5486 #define DBF_NAME_LEN 20
5487
5488 struct qeth_dbf_entry {
5489 char dbf_name[DBF_NAME_LEN];
5490 debug_info_t *dbf_info;
5491 struct list_head dbf_list;
5492 };
5493
5494 static LIST_HEAD(qeth_dbf_list);
5495 static DEFINE_MUTEX(qeth_dbf_list_mutex);
5496
qeth_get_dbf_entry(char * name)5497 static debug_info_t *qeth_get_dbf_entry(char *name)
5498 {
5499 struct qeth_dbf_entry *entry;
5500 debug_info_t *rc = NULL;
5501
5502 mutex_lock(&qeth_dbf_list_mutex);
5503 list_for_each_entry(entry, &qeth_dbf_list, dbf_list) {
5504 if (strcmp(entry->dbf_name, name) == 0) {
5505 rc = entry->dbf_info;
5506 break;
5507 }
5508 }
5509 mutex_unlock(&qeth_dbf_list_mutex);
5510 return rc;
5511 }
5512
qeth_add_dbf_entry(struct qeth_card * card,char * name)5513 static int qeth_add_dbf_entry(struct qeth_card *card, char *name)
5514 {
5515 struct qeth_dbf_entry *new_entry;
5516
5517 card->debug = debug_register(name, 2, 1, 8);
5518 if (!card->debug) {
5519 QETH_DBF_TEXT_(SETUP, 2, "%s", "qcdbf");
5520 goto err;
5521 }
5522 if (debug_register_view(card->debug, &debug_hex_ascii_view))
5523 goto err_dbg;
5524 new_entry = kzalloc(sizeof(struct qeth_dbf_entry), GFP_KERNEL);
5525 if (!new_entry)
5526 goto err_dbg;
5527 strncpy(new_entry->dbf_name, name, DBF_NAME_LEN);
5528 new_entry->dbf_info = card->debug;
5529 mutex_lock(&qeth_dbf_list_mutex);
5530 list_add(&new_entry->dbf_list, &qeth_dbf_list);
5531 mutex_unlock(&qeth_dbf_list_mutex);
5532
5533 return 0;
5534
5535 err_dbg:
5536 debug_unregister(card->debug);
5537 err:
5538 return -ENOMEM;
5539 }
5540
qeth_clear_dbf_list(void)5541 static void qeth_clear_dbf_list(void)
5542 {
5543 struct qeth_dbf_entry *entry, *tmp;
5544
5545 mutex_lock(&qeth_dbf_list_mutex);
5546 list_for_each_entry_safe(entry, tmp, &qeth_dbf_list, dbf_list) {
5547 list_del(&entry->dbf_list);
5548 debug_unregister(entry->dbf_info);
5549 kfree(entry);
5550 }
5551 mutex_unlock(&qeth_dbf_list_mutex);
5552 }
5553
qeth_alloc_netdev(struct qeth_card * card)5554 static struct net_device *qeth_alloc_netdev(struct qeth_card *card)
5555 {
5556 struct net_device *dev;
5557
5558 switch (card->info.type) {
5559 case QETH_CARD_TYPE_IQD:
5560 dev = alloc_netdev_mqs(0, "hsi%d", NET_NAME_UNKNOWN,
5561 ether_setup, QETH_MAX_QUEUES, 1);
5562 break;
5563 case QETH_CARD_TYPE_OSM:
5564 dev = alloc_etherdev(0);
5565 break;
5566 case QETH_CARD_TYPE_OSN:
5567 dev = alloc_netdev(0, "osn%d", NET_NAME_UNKNOWN, ether_setup);
5568 break;
5569 default:
5570 dev = alloc_etherdev_mqs(0, QETH_MAX_QUEUES, 1);
5571 }
5572
5573 if (!dev)
5574 return NULL;
5575
5576 dev->ml_priv = card;
5577 dev->watchdog_timeo = QETH_TX_TIMEOUT;
5578 dev->min_mtu = IS_OSN(card) ? 64 : 576;
5579 /* initialized when device first goes online: */
5580 dev->max_mtu = 0;
5581 dev->mtu = 0;
5582 SET_NETDEV_DEV(dev, &card->gdev->dev);
5583 netif_carrier_off(dev);
5584
5585 if (IS_OSN(card)) {
5586 dev->ethtool_ops = &qeth_osn_ethtool_ops;
5587 } else {
5588 dev->ethtool_ops = &qeth_ethtool_ops;
5589 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
5590 dev->hw_features |= NETIF_F_SG;
5591 dev->vlan_features |= NETIF_F_SG;
5592 if (IS_IQD(card)) {
5593 dev->features |= NETIF_F_SG;
5594 if (netif_set_real_num_tx_queues(dev,
5595 QETH_IQD_MIN_TXQ)) {
5596 free_netdev(dev);
5597 return NULL;
5598 }
5599 }
5600 }
5601
5602 return dev;
5603 }
5604
qeth_clone_netdev(struct net_device * orig)5605 struct net_device *qeth_clone_netdev(struct net_device *orig)
5606 {
5607 struct net_device *clone = qeth_alloc_netdev(orig->ml_priv);
5608
5609 if (!clone)
5610 return NULL;
5611
5612 clone->dev_port = orig->dev_port;
5613 return clone;
5614 }
5615
qeth_core_probe_device(struct ccwgroup_device * gdev)5616 static int qeth_core_probe_device(struct ccwgroup_device *gdev)
5617 {
5618 struct qeth_card *card;
5619 struct device *dev;
5620 int rc;
5621 enum qeth_discipline_id enforced_disc;
5622 char dbf_name[DBF_NAME_LEN];
5623
5624 QETH_DBF_TEXT(SETUP, 2, "probedev");
5625
5626 dev = &gdev->dev;
5627 if (!get_device(dev))
5628 return -ENODEV;
5629
5630 QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev));
5631
5632 card = qeth_alloc_card(gdev);
5633 if (!card) {
5634 QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM);
5635 rc = -ENOMEM;
5636 goto err_dev;
5637 }
5638
5639 snprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
5640 dev_name(&gdev->dev));
5641 card->debug = qeth_get_dbf_entry(dbf_name);
5642 if (!card->debug) {
5643 rc = qeth_add_dbf_entry(card, dbf_name);
5644 if (rc)
5645 goto err_card;
5646 }
5647
5648 qeth_setup_card(card);
5649 card->dev = qeth_alloc_netdev(card);
5650 if (!card->dev) {
5651 rc = -ENOMEM;
5652 goto err_card;
5653 }
5654
5655 card->qdio.no_out_queues = card->dev->num_tx_queues;
5656 rc = qeth_update_from_chp_desc(card);
5657 if (rc)
5658 goto err_chp_desc;
5659 qeth_determine_capabilities(card);
5660 qeth_set_blkt_defaults(card);
5661
5662 enforced_disc = qeth_enforce_discipline(card);
5663 switch (enforced_disc) {
5664 case QETH_DISCIPLINE_UNDETERMINED:
5665 gdev->dev.type = &qeth_generic_devtype;
5666 break;
5667 default:
5668 card->info.layer_enforced = true;
5669 rc = qeth_core_load_discipline(card, enforced_disc);
5670 if (rc)
5671 goto err_load;
5672
5673 gdev->dev.type = IS_OSN(card) ? &qeth_osn_devtype :
5674 card->discipline->devtype;
5675 rc = card->discipline->setup(card->gdev);
5676 if (rc)
5677 goto err_disc;
5678 break;
5679 }
5680
5681 return 0;
5682
5683 err_disc:
5684 qeth_core_free_discipline(card);
5685 err_load:
5686 err_chp_desc:
5687 free_netdev(card->dev);
5688 err_card:
5689 qeth_core_free_card(card);
5690 err_dev:
5691 put_device(dev);
5692 return rc;
5693 }
5694
qeth_core_remove_device(struct ccwgroup_device * gdev)5695 static void qeth_core_remove_device(struct ccwgroup_device *gdev)
5696 {
5697 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5698
5699 QETH_CARD_TEXT(card, 2, "removedv");
5700
5701 if (card->discipline) {
5702 card->discipline->remove(gdev);
5703 qeth_core_free_discipline(card);
5704 }
5705
5706 free_netdev(card->dev);
5707 qeth_core_free_card(card);
5708 put_device(&gdev->dev);
5709 }
5710
qeth_core_set_online(struct ccwgroup_device * gdev)5711 static int qeth_core_set_online(struct ccwgroup_device *gdev)
5712 {
5713 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5714 int rc = 0;
5715 enum qeth_discipline_id def_discipline;
5716
5717 if (!card->discipline) {
5718 def_discipline = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
5719 QETH_DISCIPLINE_LAYER2;
5720 rc = qeth_core_load_discipline(card, def_discipline);
5721 if (rc)
5722 goto err;
5723 rc = card->discipline->setup(card->gdev);
5724 if (rc) {
5725 qeth_core_free_discipline(card);
5726 goto err;
5727 }
5728 }
5729 rc = card->discipline->set_online(gdev);
5730 err:
5731 return rc;
5732 }
5733
qeth_core_set_offline(struct ccwgroup_device * gdev)5734 static int qeth_core_set_offline(struct ccwgroup_device *gdev)
5735 {
5736 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5737 return card->discipline->set_offline(gdev);
5738 }
5739
qeth_core_shutdown(struct ccwgroup_device * gdev)5740 static void qeth_core_shutdown(struct ccwgroup_device *gdev)
5741 {
5742 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5743 qeth_set_allowed_threads(card, 0, 1);
5744 if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
5745 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
5746 qeth_qdio_clear_card(card, 0);
5747 qeth_drain_output_queues(card);
5748 qdio_free(CARD_DDEV(card));
5749 }
5750
qeth_suspend(struct ccwgroup_device * gdev)5751 static int qeth_suspend(struct ccwgroup_device *gdev)
5752 {
5753 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5754
5755 qeth_set_allowed_threads(card, 0, 1);
5756 wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
5757 if (gdev->state == CCWGROUP_OFFLINE)
5758 return 0;
5759
5760 card->discipline->set_offline(gdev);
5761 return 0;
5762 }
5763
qeth_resume(struct ccwgroup_device * gdev)5764 static int qeth_resume(struct ccwgroup_device *gdev)
5765 {
5766 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5767 int rc;
5768
5769 rc = card->discipline->set_online(gdev);
5770
5771 qeth_set_allowed_threads(card, 0xffffffff, 0);
5772 if (rc)
5773 dev_warn(&card->gdev->dev, "The qeth device driver failed to recover an error on the device\n");
5774 return rc;
5775 }
5776
group_store(struct device_driver * ddrv,const char * buf,size_t count)5777 static ssize_t group_store(struct device_driver *ddrv, const char *buf,
5778 size_t count)
5779 {
5780 int err;
5781
5782 err = ccwgroup_create_dev(qeth_core_root_dev, to_ccwgroupdrv(ddrv), 3,
5783 buf);
5784
5785 return err ? err : count;
5786 }
5787 static DRIVER_ATTR_WO(group);
5788
5789 static struct attribute *qeth_drv_attrs[] = {
5790 &driver_attr_group.attr,
5791 NULL,
5792 };
5793 static struct attribute_group qeth_drv_attr_group = {
5794 .attrs = qeth_drv_attrs,
5795 };
5796 static const struct attribute_group *qeth_drv_attr_groups[] = {
5797 &qeth_drv_attr_group,
5798 NULL,
5799 };
5800
5801 static struct ccwgroup_driver qeth_core_ccwgroup_driver = {
5802 .driver = {
5803 .groups = qeth_drv_attr_groups,
5804 .owner = THIS_MODULE,
5805 .name = "qeth",
5806 },
5807 .ccw_driver = &qeth_ccw_driver,
5808 .setup = qeth_core_probe_device,
5809 .remove = qeth_core_remove_device,
5810 .set_online = qeth_core_set_online,
5811 .set_offline = qeth_core_set_offline,
5812 .shutdown = qeth_core_shutdown,
5813 .prepare = NULL,
5814 .complete = NULL,
5815 .freeze = qeth_suspend,
5816 .thaw = qeth_resume,
5817 .restore = qeth_resume,
5818 };
5819
qeth_get_card_by_busid(char * bus_id)5820 struct qeth_card *qeth_get_card_by_busid(char *bus_id)
5821 {
5822 struct ccwgroup_device *gdev;
5823 struct qeth_card *card;
5824
5825 gdev = get_ccwgroupdev_by_busid(&qeth_core_ccwgroup_driver, bus_id);
5826 if (!gdev)
5827 return NULL;
5828
5829 card = dev_get_drvdata(&gdev->dev);
5830 put_device(&gdev->dev);
5831 return card;
5832 }
5833 EXPORT_SYMBOL_GPL(qeth_get_card_by_busid);
5834
qeth_do_ioctl(struct net_device * dev,struct ifreq * rq,int cmd)5835 int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
5836 {
5837 struct qeth_card *card = dev->ml_priv;
5838 struct mii_ioctl_data *mii_data;
5839 int rc = 0;
5840
5841 if (!card)
5842 return -ENODEV;
5843
5844 switch (cmd) {
5845 case SIOC_QETH_ADP_SET_SNMP_CONTROL:
5846 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
5847 break;
5848 case SIOC_QETH_GET_CARD_TYPE:
5849 if ((IS_OSD(card) || IS_OSM(card) || IS_OSX(card)) &&
5850 !IS_VM_NIC(card))
5851 return 1;
5852 return 0;
5853 case SIOCGMIIPHY:
5854 mii_data = if_mii(rq);
5855 mii_data->phy_id = 0;
5856 break;
5857 case SIOCGMIIREG:
5858 mii_data = if_mii(rq);
5859 if (mii_data->phy_id != 0)
5860 rc = -EINVAL;
5861 else
5862 mii_data->val_out = qeth_mdio_read(dev,
5863 mii_data->phy_id, mii_data->reg_num);
5864 break;
5865 case SIOC_QETH_QUERY_OAT:
5866 rc = qeth_query_oat_command(card, rq->ifr_ifru.ifru_data);
5867 break;
5868 default:
5869 if (card->discipline->do_ioctl)
5870 rc = card->discipline->do_ioctl(dev, rq, cmd);
5871 else
5872 rc = -EOPNOTSUPP;
5873 }
5874 if (rc)
5875 QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
5876 return rc;
5877 }
5878 EXPORT_SYMBOL_GPL(qeth_do_ioctl);
5879
qeth_start_csum_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)5880 static int qeth_start_csum_cb(struct qeth_card *card, struct qeth_reply *reply,
5881 unsigned long data)
5882 {
5883 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5884 u32 *features = reply->param;
5885
5886 if (qeth_setassparms_inspect_rc(cmd))
5887 return -EIO;
5888
5889 *features = cmd->data.setassparms.data.flags_32bit;
5890 return 0;
5891 }
5892
qeth_set_csum_off(struct qeth_card * card,enum qeth_ipa_funcs cstype,enum qeth_prot_versions prot)5893 static int qeth_set_csum_off(struct qeth_card *card, enum qeth_ipa_funcs cstype,
5894 enum qeth_prot_versions prot)
5895 {
5896 return qeth_send_simple_setassparms_prot(card, cstype, IPA_CMD_ASS_STOP,
5897 NULL, prot);
5898 }
5899
qeth_set_csum_on(struct qeth_card * card,enum qeth_ipa_funcs cstype,enum qeth_prot_versions prot)5900 static int qeth_set_csum_on(struct qeth_card *card, enum qeth_ipa_funcs cstype,
5901 enum qeth_prot_versions prot)
5902 {
5903 u32 required_features = QETH_IPA_CHECKSUM_UDP | QETH_IPA_CHECKSUM_TCP;
5904 struct qeth_cmd_buffer *iob;
5905 struct qeth_ipa_caps caps;
5906 u32 features;
5907 int rc;
5908
5909 /* some L3 HW requires combined L3+L4 csum offload: */
5910 if (IS_LAYER3(card) && prot == QETH_PROT_IPV4 &&
5911 cstype == IPA_OUTBOUND_CHECKSUM)
5912 required_features |= QETH_IPA_CHECKSUM_IP_HDR;
5913
5914 iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_START, 0,
5915 prot);
5916 if (!iob)
5917 return -ENOMEM;
5918
5919 rc = qeth_send_ipa_cmd(card, iob, qeth_start_csum_cb, &features);
5920 if (rc)
5921 return rc;
5922
5923 if ((required_features & features) != required_features) {
5924 qeth_set_csum_off(card, cstype, prot);
5925 return -EOPNOTSUPP;
5926 }
5927
5928 iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_ENABLE,
5929 SETASS_DATA_SIZEOF(flags_32bit),
5930 prot);
5931 if (!iob) {
5932 qeth_set_csum_off(card, cstype, prot);
5933 return -ENOMEM;
5934 }
5935
5936 if (features & QETH_IPA_CHECKSUM_LP2LP)
5937 required_features |= QETH_IPA_CHECKSUM_LP2LP;
5938 __ipa_cmd(iob)->data.setassparms.data.flags_32bit = required_features;
5939 rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
5940 if (rc) {
5941 qeth_set_csum_off(card, cstype, prot);
5942 return rc;
5943 }
5944
5945 if (!qeth_ipa_caps_supported(&caps, required_features) ||
5946 !qeth_ipa_caps_enabled(&caps, required_features)) {
5947 qeth_set_csum_off(card, cstype, prot);
5948 return -EOPNOTSUPP;
5949 }
5950
5951 dev_info(&card->gdev->dev, "HW Checksumming (%sbound IPv%d) enabled\n",
5952 cstype == IPA_INBOUND_CHECKSUM ? "in" : "out", prot);
5953 if (!qeth_ipa_caps_enabled(&caps, QETH_IPA_CHECKSUM_LP2LP) &&
5954 cstype == IPA_OUTBOUND_CHECKSUM)
5955 dev_warn(&card->gdev->dev,
5956 "Hardware checksumming is performed only if %s and its peer use different OSA Express 3 ports\n",
5957 QETH_CARD_IFNAME(card));
5958 return 0;
5959 }
5960
qeth_set_ipa_csum(struct qeth_card * card,bool on,int cstype,enum qeth_prot_versions prot)5961 static int qeth_set_ipa_csum(struct qeth_card *card, bool on, int cstype,
5962 enum qeth_prot_versions prot)
5963 {
5964 return on ? qeth_set_csum_on(card, cstype, prot) :
5965 qeth_set_csum_off(card, cstype, prot);
5966 }
5967
qeth_start_tso_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)5968 static int qeth_start_tso_cb(struct qeth_card *card, struct qeth_reply *reply,
5969 unsigned long data)
5970 {
5971 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5972 struct qeth_tso_start_data *tso_data = reply->param;
5973
5974 if (qeth_setassparms_inspect_rc(cmd))
5975 return -EIO;
5976
5977 tso_data->mss = cmd->data.setassparms.data.tso.mss;
5978 tso_data->supported = cmd->data.setassparms.data.tso.supported;
5979 return 0;
5980 }
5981
qeth_set_tso_off(struct qeth_card * card,enum qeth_prot_versions prot)5982 static int qeth_set_tso_off(struct qeth_card *card,
5983 enum qeth_prot_versions prot)
5984 {
5985 return qeth_send_simple_setassparms_prot(card, IPA_OUTBOUND_TSO,
5986 IPA_CMD_ASS_STOP, NULL, prot);
5987 }
5988
qeth_set_tso_on(struct qeth_card * card,enum qeth_prot_versions prot)5989 static int qeth_set_tso_on(struct qeth_card *card,
5990 enum qeth_prot_versions prot)
5991 {
5992 struct qeth_tso_start_data tso_data;
5993 struct qeth_cmd_buffer *iob;
5994 struct qeth_ipa_caps caps;
5995 int rc;
5996
5997 iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
5998 IPA_CMD_ASS_START, 0, prot);
5999 if (!iob)
6000 return -ENOMEM;
6001
6002 rc = qeth_send_ipa_cmd(card, iob, qeth_start_tso_cb, &tso_data);
6003 if (rc)
6004 return rc;
6005
6006 if (!tso_data.mss || !(tso_data.supported & QETH_IPA_LARGE_SEND_TCP)) {
6007 qeth_set_tso_off(card, prot);
6008 return -EOPNOTSUPP;
6009 }
6010
6011 iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6012 IPA_CMD_ASS_ENABLE,
6013 SETASS_DATA_SIZEOF(caps), prot);
6014 if (!iob) {
6015 qeth_set_tso_off(card, prot);
6016 return -ENOMEM;
6017 }
6018
6019 /* enable TSO capability */
6020 __ipa_cmd(iob)->data.setassparms.data.caps.enabled =
6021 QETH_IPA_LARGE_SEND_TCP;
6022 rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6023 if (rc) {
6024 qeth_set_tso_off(card, prot);
6025 return rc;
6026 }
6027
6028 if (!qeth_ipa_caps_supported(&caps, QETH_IPA_LARGE_SEND_TCP) ||
6029 !qeth_ipa_caps_enabled(&caps, QETH_IPA_LARGE_SEND_TCP)) {
6030 qeth_set_tso_off(card, prot);
6031 return -EOPNOTSUPP;
6032 }
6033
6034 dev_info(&card->gdev->dev, "TSOv%u enabled (MSS: %u)\n", prot,
6035 tso_data.mss);
6036 return 0;
6037 }
6038
qeth_set_ipa_tso(struct qeth_card * card,bool on,enum qeth_prot_versions prot)6039 static int qeth_set_ipa_tso(struct qeth_card *card, bool on,
6040 enum qeth_prot_versions prot)
6041 {
6042 return on ? qeth_set_tso_on(card, prot) : qeth_set_tso_off(card, prot);
6043 }
6044
qeth_set_ipa_rx_csum(struct qeth_card * card,bool on)6045 static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on)
6046 {
6047 int rc_ipv4 = (on) ? -EOPNOTSUPP : 0;
6048 int rc_ipv6;
6049
6050 if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
6051 rc_ipv4 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6052 QETH_PROT_IPV4);
6053 if (!qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6054 /* no/one Offload Assist available, so the rc is trivial */
6055 return rc_ipv4;
6056
6057 rc_ipv6 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6058 QETH_PROT_IPV6);
6059
6060 if (on)
6061 /* enable: success if any Assist is active */
6062 return (rc_ipv6) ? rc_ipv4 : 0;
6063
6064 /* disable: failure if any Assist is still active */
6065 return (rc_ipv6) ? rc_ipv6 : rc_ipv4;
6066 }
6067
6068 /**
6069 * qeth_enable_hw_features() - (Re-)Enable HW functions for device features
6070 * @dev: a net_device
6071 */
qeth_enable_hw_features(struct net_device * dev)6072 void qeth_enable_hw_features(struct net_device *dev)
6073 {
6074 struct qeth_card *card = dev->ml_priv;
6075 netdev_features_t features;
6076
6077 features = dev->features;
6078 /* force-off any feature that might need an IPA sequence.
6079 * netdev_update_features() will restart them.
6080 */
6081 dev->features &= ~dev->hw_features;
6082 /* toggle VLAN filter, so that VIDs are re-programmed: */
6083 if (IS_LAYER2(card) && IS_VM_NIC(card)) {
6084 dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
6085 dev->wanted_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
6086 }
6087 netdev_update_features(dev);
6088 if (features != dev->features)
6089 dev_warn(&card->gdev->dev,
6090 "Device recovery failed to restore all offload features\n");
6091 }
6092 EXPORT_SYMBOL_GPL(qeth_enable_hw_features);
6093
qeth_set_features(struct net_device * dev,netdev_features_t features)6094 int qeth_set_features(struct net_device *dev, netdev_features_t features)
6095 {
6096 struct qeth_card *card = dev->ml_priv;
6097 netdev_features_t changed = dev->features ^ features;
6098 int rc = 0;
6099
6100 QETH_CARD_TEXT(card, 2, "setfeat");
6101 QETH_CARD_HEX(card, 2, &features, sizeof(features));
6102
6103 if ((changed & NETIF_F_IP_CSUM)) {
6104 rc = qeth_set_ipa_csum(card, features & NETIF_F_IP_CSUM,
6105 IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV4);
6106 if (rc)
6107 changed ^= NETIF_F_IP_CSUM;
6108 }
6109 if (changed & NETIF_F_IPV6_CSUM) {
6110 rc = qeth_set_ipa_csum(card, features & NETIF_F_IPV6_CSUM,
6111 IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV6);
6112 if (rc)
6113 changed ^= NETIF_F_IPV6_CSUM;
6114 }
6115 if (changed & NETIF_F_RXCSUM) {
6116 rc = qeth_set_ipa_rx_csum(card, features & NETIF_F_RXCSUM);
6117 if (rc)
6118 changed ^= NETIF_F_RXCSUM;
6119 }
6120 if (changed & NETIF_F_TSO) {
6121 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO,
6122 QETH_PROT_IPV4);
6123 if (rc)
6124 changed ^= NETIF_F_TSO;
6125 }
6126 if (changed & NETIF_F_TSO6) {
6127 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO6,
6128 QETH_PROT_IPV6);
6129 if (rc)
6130 changed ^= NETIF_F_TSO6;
6131 }
6132
6133 /* everything changed successfully? */
6134 if ((dev->features ^ features) == changed)
6135 return 0;
6136 /* something went wrong. save changed features and return error */
6137 dev->features ^= changed;
6138 return -EIO;
6139 }
6140 EXPORT_SYMBOL_GPL(qeth_set_features);
6141
qeth_fix_features(struct net_device * dev,netdev_features_t features)6142 netdev_features_t qeth_fix_features(struct net_device *dev,
6143 netdev_features_t features)
6144 {
6145 struct qeth_card *card = dev->ml_priv;
6146
6147 QETH_CARD_TEXT(card, 2, "fixfeat");
6148 if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
6149 features &= ~NETIF_F_IP_CSUM;
6150 if (!qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6))
6151 features &= ~NETIF_F_IPV6_CSUM;
6152 if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM) &&
6153 !qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6154 features &= ~NETIF_F_RXCSUM;
6155 if (!qeth_is_supported(card, IPA_OUTBOUND_TSO))
6156 features &= ~NETIF_F_TSO;
6157 if (!qeth_is_supported6(card, IPA_OUTBOUND_TSO))
6158 features &= ~NETIF_F_TSO6;
6159
6160 QETH_CARD_HEX(card, 2, &features, sizeof(features));
6161 return features;
6162 }
6163 EXPORT_SYMBOL_GPL(qeth_fix_features);
6164
qeth_features_check(struct sk_buff * skb,struct net_device * dev,netdev_features_t features)6165 netdev_features_t qeth_features_check(struct sk_buff *skb,
6166 struct net_device *dev,
6167 netdev_features_t features)
6168 {
6169 /* GSO segmentation builds skbs with
6170 * a (small) linear part for the headers, and
6171 * page frags for the data.
6172 * Compared to a linear skb, the header-only part consumes an
6173 * additional buffer element. This reduces buffer utilization, and
6174 * hurts throughput. So compress small segments into one element.
6175 */
6176 if (netif_needs_gso(skb, features)) {
6177 /* match skb_segment(): */
6178 unsigned int doffset = skb->data - skb_mac_header(skb);
6179 unsigned int hsize = skb_shinfo(skb)->gso_size;
6180 unsigned int hroom = skb_headroom(skb);
6181
6182 /* linearize only if resulting skb allocations are order-0: */
6183 if (SKB_DATA_ALIGN(hroom + doffset + hsize) <= SKB_MAX_HEAD(0))
6184 features &= ~NETIF_F_SG;
6185 }
6186
6187 return vlan_features_check(skb, features);
6188 }
6189 EXPORT_SYMBOL_GPL(qeth_features_check);
6190
qeth_get_stats64(struct net_device * dev,struct rtnl_link_stats64 * stats)6191 void qeth_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
6192 {
6193 struct qeth_card *card = dev->ml_priv;
6194 struct qeth_qdio_out_q *queue;
6195 unsigned int i;
6196
6197 QETH_CARD_TEXT(card, 5, "getstat");
6198
6199 stats->rx_packets = card->stats.rx_packets;
6200 stats->rx_bytes = card->stats.rx_bytes;
6201 stats->rx_errors = card->stats.rx_errors;
6202 stats->rx_dropped = card->stats.rx_dropped;
6203 stats->multicast = card->stats.rx_multicast;
6204
6205 for (i = 0; i < card->qdio.no_out_queues; i++) {
6206 queue = card->qdio.out_qs[i];
6207
6208 stats->tx_packets += queue->stats.tx_packets;
6209 stats->tx_bytes += queue->stats.tx_bytes;
6210 stats->tx_errors += queue->stats.tx_errors;
6211 stats->tx_dropped += queue->stats.tx_dropped;
6212 }
6213 }
6214 EXPORT_SYMBOL_GPL(qeth_get_stats64);
6215
qeth_iqd_select_queue(struct net_device * dev,struct sk_buff * skb,u8 cast_type,struct net_device * sb_dev)6216 u16 qeth_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
6217 u8 cast_type, struct net_device *sb_dev)
6218 {
6219 if (cast_type != RTN_UNICAST)
6220 return QETH_IQD_MCAST_TXQ;
6221 return QETH_IQD_MIN_UCAST_TXQ;
6222 }
6223 EXPORT_SYMBOL_GPL(qeth_iqd_select_queue);
6224
qeth_open(struct net_device * dev)6225 int qeth_open(struct net_device *dev)
6226 {
6227 struct qeth_card *card = dev->ml_priv;
6228
6229 QETH_CARD_TEXT(card, 4, "qethopen");
6230
6231 if (qdio_stop_irq(CARD_DDEV(card), 0) < 0)
6232 return -EIO;
6233
6234 card->data.state = CH_STATE_UP;
6235 netif_tx_start_all_queues(dev);
6236
6237 napi_enable(&card->napi);
6238 local_bh_disable();
6239 napi_schedule(&card->napi);
6240 if (IS_IQD(card)) {
6241 struct qeth_qdio_out_q *queue;
6242 unsigned int i;
6243
6244 qeth_for_each_output_queue(card, queue, i) {
6245 netif_tx_napi_add(dev, &queue->napi, qeth_tx_poll,
6246 QETH_NAPI_WEIGHT);
6247 napi_enable(&queue->napi);
6248 napi_schedule(&queue->napi);
6249 }
6250 }
6251 /* kick-start the NAPI softirq: */
6252 local_bh_enable();
6253 return 0;
6254 }
6255 EXPORT_SYMBOL_GPL(qeth_open);
6256
qeth_stop(struct net_device * dev)6257 int qeth_stop(struct net_device *dev)
6258 {
6259 struct qeth_card *card = dev->ml_priv;
6260
6261 QETH_CARD_TEXT(card, 4, "qethstop");
6262 if (IS_IQD(card)) {
6263 struct qeth_qdio_out_q *queue;
6264 unsigned int i;
6265
6266 /* Quiesce the NAPI instances: */
6267 qeth_for_each_output_queue(card, queue, i) {
6268 napi_disable(&queue->napi);
6269 del_timer_sync(&queue->timer);
6270 }
6271
6272 /* Stop .ndo_start_xmit, might still access queue->napi. */
6273 netif_tx_disable(dev);
6274
6275 /* Queues may get re-allocated, so remove the NAPIs here. */
6276 qeth_for_each_output_queue(card, queue, i)
6277 netif_napi_del(&queue->napi);
6278 } else {
6279 netif_tx_disable(dev);
6280 }
6281
6282 napi_disable(&card->napi);
6283 return 0;
6284 }
6285 EXPORT_SYMBOL_GPL(qeth_stop);
6286
qeth_core_init(void)6287 static int __init qeth_core_init(void)
6288 {
6289 int rc;
6290
6291 pr_info("loading core functions\n");
6292
6293 rc = qeth_register_dbf_views();
6294 if (rc)
6295 goto dbf_err;
6296 qeth_core_root_dev = root_device_register("qeth");
6297 rc = PTR_ERR_OR_ZERO(qeth_core_root_dev);
6298 if (rc)
6299 goto register_err;
6300 qeth_core_header_cache =
6301 kmem_cache_create("qeth_hdr", QETH_HDR_CACHE_OBJ_SIZE,
6302 roundup_pow_of_two(QETH_HDR_CACHE_OBJ_SIZE),
6303 0, NULL);
6304 if (!qeth_core_header_cache) {
6305 rc = -ENOMEM;
6306 goto slab_err;
6307 }
6308 qeth_qdio_outbuf_cache = kmem_cache_create("qeth_buf",
6309 sizeof(struct qeth_qdio_out_buffer), 0, 0, NULL);
6310 if (!qeth_qdio_outbuf_cache) {
6311 rc = -ENOMEM;
6312 goto cqslab_err;
6313 }
6314 rc = ccw_driver_register(&qeth_ccw_driver);
6315 if (rc)
6316 goto ccw_err;
6317 rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver);
6318 if (rc)
6319 goto ccwgroup_err;
6320
6321 return 0;
6322
6323 ccwgroup_err:
6324 ccw_driver_unregister(&qeth_ccw_driver);
6325 ccw_err:
6326 kmem_cache_destroy(qeth_qdio_outbuf_cache);
6327 cqslab_err:
6328 kmem_cache_destroy(qeth_core_header_cache);
6329 slab_err:
6330 root_device_unregister(qeth_core_root_dev);
6331 register_err:
6332 qeth_unregister_dbf_views();
6333 dbf_err:
6334 pr_err("Initializing the qeth device driver failed\n");
6335 return rc;
6336 }
6337
qeth_core_exit(void)6338 static void __exit qeth_core_exit(void)
6339 {
6340 qeth_clear_dbf_list();
6341 ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver);
6342 ccw_driver_unregister(&qeth_ccw_driver);
6343 kmem_cache_destroy(qeth_qdio_outbuf_cache);
6344 kmem_cache_destroy(qeth_core_header_cache);
6345 root_device_unregister(qeth_core_root_dev);
6346 qeth_unregister_dbf_views();
6347 pr_info("core functions removed\n");
6348 }
6349
6350 module_init(qeth_core_init);
6351 module_exit(qeth_core_exit);
6352 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
6353 MODULE_DESCRIPTION("qeth core functions");
6354 MODULE_LICENSE("GPL");
6355
