Version:  2.0.40 2.2.26 2.4.37 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1

Linux/drivers/s390/net/qeth_core_main.c

  1 /*
  2  *    Copyright IBM Corp. 2007, 2009
  3  *    Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
  4  *               Frank Pavlic <fpavlic@de.ibm.com>,
  5  *               Thomas Spatzier <tspat@de.ibm.com>,
  6  *               Frank Blaschka <frank.blaschka@de.ibm.com>
  7  */
  8 
  9 #define KMSG_COMPONENT "qeth"
 10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
 11 
 12 #include <linux/module.h>
 13 #include <linux/moduleparam.h>
 14 #include <linux/string.h>
 15 #include <linux/errno.h>
 16 #include <linux/kernel.h>
 17 #include <linux/ip.h>
 18 #include <linux/tcp.h>
 19 #include <linux/mii.h>
 20 #include <linux/kthread.h>
 21 #include <linux/slab.h>
 22 #include <net/iucv/af_iucv.h>
 23 #include <net/dsfield.h>
 24 
 25 #include <asm/ebcdic.h>
 26 #include <asm/chpid.h>
 27 #include <asm/io.h>
 28 #include <asm/sysinfo.h>
 29 #include <asm/compat.h>
 30 
 31 #include "qeth_core.h"
 32 
 33 struct qeth_dbf_info qeth_dbf[QETH_DBF_INFOS] = {
 34         /* define dbf - Name, Pages, Areas, Maxlen, Level, View, Handle */
 35         /*                   N  P  A    M  L  V                      H  */
 36         [QETH_DBF_SETUP] = {"qeth_setup",
 37                                 8, 1,   8, 5, &debug_hex_ascii_view, NULL},
 38         [QETH_DBF_MSG]   = {"qeth_msg", 8, 1, 11 * sizeof(long), 3,
 39                             &debug_sprintf_view, NULL},
 40         [QETH_DBF_CTRL]  = {"qeth_control",
 41                 8, 1, QETH_DBF_CTRL_LEN, 5, &debug_hex_ascii_view, NULL},
 42 };
 43 EXPORT_SYMBOL_GPL(qeth_dbf);
 44 
 45 struct qeth_card_list_struct qeth_core_card_list;
 46 EXPORT_SYMBOL_GPL(qeth_core_card_list);
 47 struct kmem_cache *qeth_core_header_cache;
 48 EXPORT_SYMBOL_GPL(qeth_core_header_cache);
 49 static struct kmem_cache *qeth_qdio_outbuf_cache;
 50 
 51 static struct device *qeth_core_root_dev;
 52 static unsigned int known_devices[][6] = QETH_MODELLIST_ARRAY;
 53 static struct lock_class_key qdio_out_skb_queue_key;
 54 static struct mutex qeth_mod_mutex;
 55 
 56 static void qeth_send_control_data_cb(struct qeth_channel *,
 57                         struct qeth_cmd_buffer *);
 58 static int qeth_issue_next_read(struct qeth_card *);
 59 static struct qeth_cmd_buffer *qeth_get_buffer(struct qeth_channel *);
 60 static void qeth_setup_ccw(struct qeth_channel *, unsigned char *, __u32);
 61 static void qeth_free_buffer_pool(struct qeth_card *);
 62 static int qeth_qdio_establish(struct qeth_card *);
 63 static void qeth_free_qdio_buffers(struct qeth_card *);
 64 static void qeth_notify_skbs(struct qeth_qdio_out_q *queue,
 65                 struct qeth_qdio_out_buffer *buf,
 66                 enum iucv_tx_notify notification);
 67 static void qeth_release_skbs(struct qeth_qdio_out_buffer *buf);
 68 static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
 69                 struct qeth_qdio_out_buffer *buf,
 70                 enum qeth_qdio_buffer_states newbufstate);
 71 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *, int);
 72 
 73 struct workqueue_struct *qeth_wq;
 74 EXPORT_SYMBOL_GPL(qeth_wq);
 75 
 76 int qeth_card_hw_is_reachable(struct qeth_card *card)
 77 {
 78         return (card->state == CARD_STATE_SOFTSETUP) ||
 79                 (card->state == CARD_STATE_UP);
 80 }
 81 EXPORT_SYMBOL_GPL(qeth_card_hw_is_reachable);
 82 
 83 static void qeth_close_dev_handler(struct work_struct *work)
 84 {
 85         struct qeth_card *card;
 86 
 87         card = container_of(work, struct qeth_card, close_dev_work);
 88         QETH_CARD_TEXT(card, 2, "cldevhdl");
 89         rtnl_lock();
 90         dev_close(card->dev);
 91         rtnl_unlock();
 92         ccwgroup_set_offline(card->gdev);
 93 }
 94 
 95 void qeth_close_dev(struct qeth_card *card)
 96 {
 97         QETH_CARD_TEXT(card, 2, "cldevsubm");
 98         queue_work(qeth_wq, &card->close_dev_work);
 99 }
100 EXPORT_SYMBOL_GPL(qeth_close_dev);
101 
102 static inline const char *qeth_get_cardname(struct qeth_card *card)
103 {
104         if (card->info.guestlan) {
105                 switch (card->info.type) {
106                 case QETH_CARD_TYPE_OSD:
107                         return " Virtual NIC QDIO";
108                 case QETH_CARD_TYPE_IQD:
109                         return " Virtual NIC Hiper";
110                 case QETH_CARD_TYPE_OSM:
111                         return " Virtual NIC QDIO - OSM";
112                 case QETH_CARD_TYPE_OSX:
113                         return " Virtual NIC QDIO - OSX";
114                 default:
115                         return " unknown";
116                 }
117         } else {
118                 switch (card->info.type) {
119                 case QETH_CARD_TYPE_OSD:
120                         return " OSD Express";
121                 case QETH_CARD_TYPE_IQD:
122                         return " HiperSockets";
123                 case QETH_CARD_TYPE_OSN:
124                         return " OSN QDIO";
125                 case QETH_CARD_TYPE_OSM:
126                         return " OSM QDIO";
127                 case QETH_CARD_TYPE_OSX:
128                         return " OSX QDIO";
129                 default:
130                         return " unknown";
131                 }
132         }
133         return " n/a";
134 }
135 
136 /* max length to be returned: 14 */
137 const char *qeth_get_cardname_short(struct qeth_card *card)
138 {
139         if (card->info.guestlan) {
140                 switch (card->info.type) {
141                 case QETH_CARD_TYPE_OSD:
142                         return "Virt.NIC QDIO";
143                 case QETH_CARD_TYPE_IQD:
144                         return "Virt.NIC Hiper";
145                 case QETH_CARD_TYPE_OSM:
146                         return "Virt.NIC OSM";
147                 case QETH_CARD_TYPE_OSX:
148                         return "Virt.NIC OSX";
149                 default:
150                         return "unknown";
151                 }
152         } else {
153                 switch (card->info.type) {
154                 case QETH_CARD_TYPE_OSD:
155                         switch (card->info.link_type) {
156                         case QETH_LINK_TYPE_FAST_ETH:
157                                 return "OSD_100";
158                         case QETH_LINK_TYPE_HSTR:
159                                 return "HSTR";
160                         case QETH_LINK_TYPE_GBIT_ETH:
161                                 return "OSD_1000";
162                         case QETH_LINK_TYPE_10GBIT_ETH:
163                                 return "OSD_10GIG";
164                         case QETH_LINK_TYPE_LANE_ETH100:
165                                 return "OSD_FE_LANE";
166                         case QETH_LINK_TYPE_LANE_TR:
167                                 return "OSD_TR_LANE";
168                         case QETH_LINK_TYPE_LANE_ETH1000:
169                                 return "OSD_GbE_LANE";
170                         case QETH_LINK_TYPE_LANE:
171                                 return "OSD_ATM_LANE";
172                         default:
173                                 return "OSD_Express";
174                         }
175                 case QETH_CARD_TYPE_IQD:
176                         return "HiperSockets";
177                 case QETH_CARD_TYPE_OSN:
178                         return "OSN";
179                 case QETH_CARD_TYPE_OSM:
180                         return "OSM_1000";
181                 case QETH_CARD_TYPE_OSX:
182                         return "OSX_10GIG";
183                 default:
184                         return "unknown";
185                 }
186         }
187         return "n/a";
188 }
189 
190 void qeth_set_recovery_task(struct qeth_card *card)
191 {
192         card->recovery_task = current;
193 }
194 EXPORT_SYMBOL_GPL(qeth_set_recovery_task);
195 
196 void qeth_clear_recovery_task(struct qeth_card *card)
197 {
198         card->recovery_task = NULL;
199 }
200 EXPORT_SYMBOL_GPL(qeth_clear_recovery_task);
201 
202 static bool qeth_is_recovery_task(const struct qeth_card *card)
203 {
204         return card->recovery_task == current;
205 }
206 
207 void qeth_set_allowed_threads(struct qeth_card *card, unsigned long threads,
208                          int clear_start_mask)
209 {
210         unsigned long flags;
211 
212         spin_lock_irqsave(&card->thread_mask_lock, flags);
213         card->thread_allowed_mask = threads;
214         if (clear_start_mask)
215                 card->thread_start_mask &= threads;
216         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
217         wake_up(&card->wait_q);
218 }
219 EXPORT_SYMBOL_GPL(qeth_set_allowed_threads);
220 
221 int qeth_threads_running(struct qeth_card *card, unsigned long threads)
222 {
223         unsigned long flags;
224         int rc = 0;
225 
226         spin_lock_irqsave(&card->thread_mask_lock, flags);
227         rc = (card->thread_running_mask & threads);
228         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
229         return rc;
230 }
231 EXPORT_SYMBOL_GPL(qeth_threads_running);
232 
233 int qeth_wait_for_threads(struct qeth_card *card, unsigned long threads)
234 {
235         if (qeth_is_recovery_task(card))
236                 return 0;
237         return wait_event_interruptible(card->wait_q,
238                         qeth_threads_running(card, threads) == 0);
239 }
240 EXPORT_SYMBOL_GPL(qeth_wait_for_threads);
241 
242 void qeth_clear_working_pool_list(struct qeth_card *card)
243 {
244         struct qeth_buffer_pool_entry *pool_entry, *tmp;
245 
246         QETH_CARD_TEXT(card, 5, "clwrklst");
247         list_for_each_entry_safe(pool_entry, tmp,
248                             &card->qdio.in_buf_pool.entry_list, list){
249                         list_del(&pool_entry->list);
250         }
251 }
252 EXPORT_SYMBOL_GPL(qeth_clear_working_pool_list);
253 
254 static int qeth_alloc_buffer_pool(struct qeth_card *card)
255 {
256         struct qeth_buffer_pool_entry *pool_entry;
257         void *ptr;
258         int i, j;
259 
260         QETH_CARD_TEXT(card, 5, "alocpool");
261         for (i = 0; i < card->qdio.init_pool.buf_count; ++i) {
262                 pool_entry = kzalloc(sizeof(*pool_entry), GFP_KERNEL);
263                 if (!pool_entry) {
264                         qeth_free_buffer_pool(card);
265                         return -ENOMEM;
266                 }
267                 for (j = 0; j < QETH_MAX_BUFFER_ELEMENTS(card); ++j) {
268                         ptr = (void *) __get_free_page(GFP_KERNEL);
269                         if (!ptr) {
270                                 while (j > 0)
271                                         free_page((unsigned long)
272                                                   pool_entry->elements[--j]);
273                                 kfree(pool_entry);
274                                 qeth_free_buffer_pool(card);
275                                 return -ENOMEM;
276                         }
277                         pool_entry->elements[j] = ptr;
278                 }
279                 list_add(&pool_entry->init_list,
280                          &card->qdio.init_pool.entry_list);
281         }
282         return 0;
283 }
284 
285 int qeth_realloc_buffer_pool(struct qeth_card *card, int bufcnt)
286 {
287         QETH_CARD_TEXT(card, 2, "realcbp");
288 
289         if ((card->state != CARD_STATE_DOWN) &&
290             (card->state != CARD_STATE_RECOVER))
291                 return -EPERM;
292 
293         /* TODO: steel/add buffers from/to a running card's buffer pool (?) */
294         qeth_clear_working_pool_list(card);
295         qeth_free_buffer_pool(card);
296         card->qdio.in_buf_pool.buf_count = bufcnt;
297         card->qdio.init_pool.buf_count = bufcnt;
298         return qeth_alloc_buffer_pool(card);
299 }
300 EXPORT_SYMBOL_GPL(qeth_realloc_buffer_pool);
301 
302 static void qeth_free_qdio_queue(struct qeth_qdio_q *q)
303 {
304         if (!q)
305                 return;
306 
307         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
308         kfree(q);
309 }
310 
311 static struct qeth_qdio_q *qeth_alloc_qdio_queue(void)
312 {
313         struct qeth_qdio_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
314         int i;
315 
316         if (!q)
317                 return NULL;
318 
319         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
320                 kfree(q);
321                 return NULL;
322         }
323 
324         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i)
325                 q->bufs[i].buffer = q->qdio_bufs[i];
326 
327         QETH_DBF_HEX(SETUP, 2, &q, sizeof(void *));
328         return q;
329 }
330 
331 static inline int qeth_cq_init(struct qeth_card *card)
332 {
333         int rc;
334 
335         if (card->options.cq == QETH_CQ_ENABLED) {
336                 QETH_DBF_TEXT(SETUP, 2, "cqinit");
337                 qdio_reset_buffers(card->qdio.c_q->qdio_bufs,
338                                    QDIO_MAX_BUFFERS_PER_Q);
339                 card->qdio.c_q->next_buf_to_init = 127;
340                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT,
341                              card->qdio.no_in_queues - 1, 0,
342                              127);
343                 if (rc) {
344                         QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
345                         goto out;
346                 }
347         }
348         rc = 0;
349 out:
350         return rc;
351 }
352 
353 static inline int qeth_alloc_cq(struct qeth_card *card)
354 {
355         int rc;
356 
357         if (card->options.cq == QETH_CQ_ENABLED) {
358                 int i;
359                 struct qdio_outbuf_state *outbuf_states;
360 
361                 QETH_DBF_TEXT(SETUP, 2, "cqon");
362                 card->qdio.c_q = qeth_alloc_qdio_queue();
363                 if (!card->qdio.c_q) {
364                         rc = -1;
365                         goto kmsg_out;
366                 }
367                 card->qdio.no_in_queues = 2;
368                 card->qdio.out_bufstates =
369                         kzalloc(card->qdio.no_out_queues *
370                                 QDIO_MAX_BUFFERS_PER_Q *
371                                 sizeof(struct qdio_outbuf_state), GFP_KERNEL);
372                 outbuf_states = card->qdio.out_bufstates;
373                 if (outbuf_states == NULL) {
374                         rc = -1;
375                         goto free_cq_out;
376                 }
377                 for (i = 0; i < card->qdio.no_out_queues; ++i) {
378                         card->qdio.out_qs[i]->bufstates = outbuf_states;
379                         outbuf_states += QDIO_MAX_BUFFERS_PER_Q;
380                 }
381         } else {
382                 QETH_DBF_TEXT(SETUP, 2, "nocq");
383                 card->qdio.c_q = NULL;
384                 card->qdio.no_in_queues = 1;
385         }
386         QETH_DBF_TEXT_(SETUP, 2, "iqc%d", card->qdio.no_in_queues);
387         rc = 0;
388 out:
389         return rc;
390 free_cq_out:
391         qeth_free_qdio_queue(card->qdio.c_q);
392         card->qdio.c_q = NULL;
393 kmsg_out:
394         dev_err(&card->gdev->dev, "Failed to create completion queue\n");
395         goto out;
396 }
397 
398 static inline void qeth_free_cq(struct qeth_card *card)
399 {
400         if (card->qdio.c_q) {
401                 --card->qdio.no_in_queues;
402                 qeth_free_qdio_queue(card->qdio.c_q);
403                 card->qdio.c_q = NULL;
404         }
405         kfree(card->qdio.out_bufstates);
406         card->qdio.out_bufstates = NULL;
407 }
408 
409 static inline enum iucv_tx_notify qeth_compute_cq_notification(int sbalf15,
410         int delayed) {
411         enum iucv_tx_notify n;
412 
413         switch (sbalf15) {
414         case 0:
415                 n = delayed ? TX_NOTIFY_DELAYED_OK : TX_NOTIFY_OK;
416                 break;
417         case 4:
418         case 16:
419         case 17:
420         case 18:
421                 n = delayed ? TX_NOTIFY_DELAYED_UNREACHABLE :
422                         TX_NOTIFY_UNREACHABLE;
423                 break;
424         default:
425                 n = delayed ? TX_NOTIFY_DELAYED_GENERALERROR :
426                         TX_NOTIFY_GENERALERROR;
427                 break;
428         }
429 
430         return n;
431 }
432 
433 static inline void qeth_cleanup_handled_pending(struct qeth_qdio_out_q *q,
434         int bidx, int forced_cleanup)
435 {
436         if (q->card->options.cq != QETH_CQ_ENABLED)
437                 return;
438 
439         if (q->bufs[bidx]->next_pending != NULL) {
440                 struct qeth_qdio_out_buffer *head = q->bufs[bidx];
441                 struct qeth_qdio_out_buffer *c = q->bufs[bidx]->next_pending;
442 
443                 while (c) {
444                         if (forced_cleanup ||
445                             atomic_read(&c->state) ==
446                               QETH_QDIO_BUF_HANDLED_DELAYED) {
447                                 struct qeth_qdio_out_buffer *f = c;
448                                 QETH_CARD_TEXT(f->q->card, 5, "fp");
449                                 QETH_CARD_TEXT_(f->q->card, 5, "%lx", (long) f);
450                                 /* release here to avoid interleaving between
451                                    outbound tasklet and inbound tasklet
452                                    regarding notifications and lifecycle */
453                                 qeth_release_skbs(c);
454 
455                                 c = f->next_pending;
456                                 WARN_ON_ONCE(head->next_pending != f);
457                                 head->next_pending = c;
458                                 kmem_cache_free(qeth_qdio_outbuf_cache, f);
459                         } else {
460                                 head = c;
461                                 c = c->next_pending;
462                         }
463 
464                 }
465         }
466         if (forced_cleanup && (atomic_read(&(q->bufs[bidx]->state)) ==
467                                         QETH_QDIO_BUF_HANDLED_DELAYED)) {
468                 /* for recovery situations */
469                 q->bufs[bidx]->aob = q->bufstates[bidx].aob;
470                 qeth_init_qdio_out_buf(q, bidx);
471                 QETH_CARD_TEXT(q->card, 2, "clprecov");
472         }
473 }
474 
475 
476 static inline void qeth_qdio_handle_aob(struct qeth_card *card,
477                 unsigned long phys_aob_addr) {
478         struct qaob *aob;
479         struct qeth_qdio_out_buffer *buffer;
480         enum iucv_tx_notify notification;
481 
482         aob = (struct qaob *) phys_to_virt(phys_aob_addr);
483         QETH_CARD_TEXT(card, 5, "haob");
484         QETH_CARD_TEXT_(card, 5, "%lx", phys_aob_addr);
485         buffer = (struct qeth_qdio_out_buffer *) aob->user1;
486         QETH_CARD_TEXT_(card, 5, "%lx", aob->user1);
487 
488         if (atomic_cmpxchg(&buffer->state, QETH_QDIO_BUF_PRIMED,
489                            QETH_QDIO_BUF_IN_CQ) == QETH_QDIO_BUF_PRIMED) {
490                 notification = TX_NOTIFY_OK;
491         } else {
492                 WARN_ON_ONCE(atomic_read(&buffer->state) !=
493                                                         QETH_QDIO_BUF_PENDING);
494                 atomic_set(&buffer->state, QETH_QDIO_BUF_IN_CQ);
495                 notification = TX_NOTIFY_DELAYED_OK;
496         }
497 
498         if (aob->aorc != 0)  {
499                 QETH_CARD_TEXT_(card, 2, "aorc%02X", aob->aorc);
500                 notification = qeth_compute_cq_notification(aob->aorc, 1);
501         }
502         qeth_notify_skbs(buffer->q, buffer, notification);
503 
504         buffer->aob = NULL;
505         qeth_clear_output_buffer(buffer->q, buffer,
506                                  QETH_QDIO_BUF_HANDLED_DELAYED);
507 
508         /* from here on: do not touch buffer anymore */
509         qdio_release_aob(aob);
510 }
511 
512 static inline int qeth_is_cq(struct qeth_card *card, unsigned int queue)
513 {
514         return card->options.cq == QETH_CQ_ENABLED &&
515             card->qdio.c_q != NULL &&
516             queue != 0 &&
517             queue == card->qdio.no_in_queues - 1;
518 }
519 
520 
521 static int qeth_issue_next_read(struct qeth_card *card)
522 {
523         int rc;
524         struct qeth_cmd_buffer *iob;
525 
526         QETH_CARD_TEXT(card, 5, "issnxrd");
527         if (card->read.state != CH_STATE_UP)
528                 return -EIO;
529         iob = qeth_get_buffer(&card->read);
530         if (!iob) {
531                 dev_warn(&card->gdev->dev, "The qeth device driver "
532                         "failed to recover an error on the device\n");
533                 QETH_DBF_MESSAGE(2, "%s issue_next_read failed: no iob "
534                         "available\n", dev_name(&card->gdev->dev));
535                 return -ENOMEM;
536         }
537         qeth_setup_ccw(&card->read, iob->data, QETH_BUFSIZE);
538         QETH_CARD_TEXT(card, 6, "noirqpnd");
539         rc = ccw_device_start(card->read.ccwdev, &card->read.ccw,
540                               (addr_t) iob, 0, 0);
541         if (rc) {
542                 QETH_DBF_MESSAGE(2, "%s error in starting next read ccw! "
543                         "rc=%i\n", dev_name(&card->gdev->dev), rc);
544                 atomic_set(&card->read.irq_pending, 0);
545                 card->read_or_write_problem = 1;
546                 qeth_schedule_recovery(card);
547                 wake_up(&card->wait_q);
548         }
549         return rc;
550 }
551 
552 static struct qeth_reply *qeth_alloc_reply(struct qeth_card *card)
553 {
554         struct qeth_reply *reply;
555 
556         reply = kzalloc(sizeof(struct qeth_reply), GFP_ATOMIC);
557         if (reply) {
558                 atomic_set(&reply->refcnt, 1);
559                 atomic_set(&reply->received, 0);
560                 reply->card = card;
561         }
562         return reply;
563 }
564 
565 static void qeth_get_reply(struct qeth_reply *reply)
566 {
567         WARN_ON(atomic_read(&reply->refcnt) <= 0);
568         atomic_inc(&reply->refcnt);
569 }
570 
571 static void qeth_put_reply(struct qeth_reply *reply)
572 {
573         WARN_ON(atomic_read(&reply->refcnt) <= 0);
574         if (atomic_dec_and_test(&reply->refcnt))
575                 kfree(reply);
576 }
577 
578 static void qeth_issue_ipa_msg(struct qeth_ipa_cmd *cmd, int rc,
579                 struct qeth_card *card)
580 {
581         char *ipa_name;
582         int com = cmd->hdr.command;
583         ipa_name = qeth_get_ipa_cmd_name(com);
584         if (rc)
585                 QETH_DBF_MESSAGE(2, "IPA: %s(x%X) for %s/%s returned "
586                                 "x%X \"%s\"\n",
587                                 ipa_name, com, dev_name(&card->gdev->dev),
588                                 QETH_CARD_IFNAME(card), rc,
589                                 qeth_get_ipa_msg(rc));
590         else
591                 QETH_DBF_MESSAGE(5, "IPA: %s(x%X) for %s/%s succeeded\n",
592                                 ipa_name, com, dev_name(&card->gdev->dev),
593                                 QETH_CARD_IFNAME(card));
594 }
595 
596 static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card,
597                 struct qeth_cmd_buffer *iob)
598 {
599         struct qeth_ipa_cmd *cmd = NULL;
600 
601         QETH_CARD_TEXT(card, 5, "chkipad");
602         if (IS_IPA(iob->data)) {
603                 cmd = (struct qeth_ipa_cmd *) PDU_ENCAPSULATION(iob->data);
604                 if (IS_IPA_REPLY(cmd)) {
605                         if (cmd->hdr.command != IPA_CMD_SETCCID &&
606                             cmd->hdr.command != IPA_CMD_DELCCID &&
607                             cmd->hdr.command != IPA_CMD_MODCCID &&
608                             cmd->hdr.command != IPA_CMD_SET_DIAG_ASS)
609                                 qeth_issue_ipa_msg(cmd,
610                                                 cmd->hdr.return_code, card);
611                         return cmd;
612                 } else {
613                         switch (cmd->hdr.command) {
614                         case IPA_CMD_STOPLAN:
615                                 if (cmd->hdr.return_code ==
616                                                 IPA_RC_VEPA_TO_VEB_TRANSITION) {
617                                         dev_err(&card->gdev->dev,
618                                            "Interface %s is down because the "
619                                            "adjacent port is no longer in "
620                                            "reflective relay mode\n",
621                                            QETH_CARD_IFNAME(card));
622                                         qeth_close_dev(card);
623                                 } else {
624                                         dev_warn(&card->gdev->dev,
625                                            "The link for interface %s on CHPID"
626                                            " 0x%X failed\n",
627                                            QETH_CARD_IFNAME(card),
628                                            card->info.chpid);
629                                         qeth_issue_ipa_msg(cmd,
630                                                 cmd->hdr.return_code, card);
631                                 }
632                                 card->lan_online = 0;
633                                 if (card->dev && netif_carrier_ok(card->dev))
634                                         netif_carrier_off(card->dev);
635                                 return NULL;
636                         case IPA_CMD_STARTLAN:
637                                 dev_info(&card->gdev->dev,
638                                            "The link for %s on CHPID 0x%X has"
639                                            " been restored\n",
640                                            QETH_CARD_IFNAME(card),
641                                            card->info.chpid);
642                                 netif_carrier_on(card->dev);
643                                 card->lan_online = 1;
644                                 if (card->info.hwtrap)
645                                         card->info.hwtrap = 2;
646                                 qeth_schedule_recovery(card);
647                                 return NULL;
648                         case IPA_CMD_SETBRIDGEPORT:
649                         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
650                                 if (card->discipline->control_event_handler
651                                                                 (card, cmd))
652                                         return cmd;
653                                 else
654                                         return NULL;
655                         case IPA_CMD_MODCCID:
656                                 return cmd;
657                         case IPA_CMD_REGISTER_LOCAL_ADDR:
658                                 QETH_CARD_TEXT(card, 3, "irla");
659                                 break;
660                         case IPA_CMD_UNREGISTER_LOCAL_ADDR:
661                                 QETH_CARD_TEXT(card, 3, "urla");
662                                 break;
663                         default:
664                                 QETH_DBF_MESSAGE(2, "Received data is IPA "
665                                            "but not a reply!\n");
666                                 break;
667                         }
668                 }
669         }
670         return cmd;
671 }
672 
673 void qeth_clear_ipacmd_list(struct qeth_card *card)
674 {
675         struct qeth_reply *reply, *r;
676         unsigned long flags;
677 
678         QETH_CARD_TEXT(card, 4, "clipalst");
679 
680         spin_lock_irqsave(&card->lock, flags);
681         list_for_each_entry_safe(reply, r, &card->cmd_waiter_list, list) {
682                 qeth_get_reply(reply);
683                 reply->rc = -EIO;
684                 atomic_inc(&reply->received);
685                 list_del_init(&reply->list);
686                 wake_up(&reply->wait_q);
687                 qeth_put_reply(reply);
688         }
689         spin_unlock_irqrestore(&card->lock, flags);
690         atomic_set(&card->write.irq_pending, 0);
691 }
692 EXPORT_SYMBOL_GPL(qeth_clear_ipacmd_list);
693 
694 static int qeth_check_idx_response(struct qeth_card *card,
695         unsigned char *buffer)
696 {
697         if (!buffer)
698                 return 0;
699 
700         QETH_DBF_HEX(CTRL, 2, buffer, QETH_DBF_CTRL_LEN);
701         if ((buffer[2] & 0xc0) == 0xc0) {
702                 QETH_DBF_MESSAGE(2, "received an IDX TERMINATE "
703                            "with cause code 0x%02x%s\n",
704                            buffer[4],
705                            ((buffer[4] == 0x22) ?
706                             " -- try another portname" : ""));
707                 QETH_CARD_TEXT(card, 2, "ckidxres");
708                 QETH_CARD_TEXT(card, 2, " idxterm");
709                 QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
710                 if (buffer[4] == 0xf6) {
711                         dev_err(&card->gdev->dev,
712                         "The qeth device is not configured "
713                         "for the OSI layer required by z/VM\n");
714                         return -EPERM;
715                 }
716                 return -EIO;
717         }
718         return 0;
719 }
720 
721 static struct qeth_card *CARD_FROM_CDEV(struct ccw_device *cdev)
722 {
723         struct qeth_card *card = dev_get_drvdata(&((struct ccwgroup_device *)
724                 dev_get_drvdata(&cdev->dev))->dev);
725         return card;
726 }
727 
728 static void qeth_setup_ccw(struct qeth_channel *channel, unsigned char *iob,
729                 __u32 len)
730 {
731         struct qeth_card *card;
732 
733         card = CARD_FROM_CDEV(channel->ccwdev);
734         QETH_CARD_TEXT(card, 4, "setupccw");
735         if (channel == &card->read)
736                 memcpy(&channel->ccw, READ_CCW, sizeof(struct ccw1));
737         else
738                 memcpy(&channel->ccw, WRITE_CCW, sizeof(struct ccw1));
739         channel->ccw.count = len;
740         channel->ccw.cda = (__u32) __pa(iob);
741 }
742 
743 static struct qeth_cmd_buffer *__qeth_get_buffer(struct qeth_channel *channel)
744 {
745         __u8 index;
746 
747         QETH_CARD_TEXT(CARD_FROM_CDEV(channel->ccwdev), 6, "getbuff");
748         index = channel->io_buf_no;
749         do {
750                 if (channel->iob[index].state == BUF_STATE_FREE) {
751                         channel->iob[index].state = BUF_STATE_LOCKED;
752                         channel->io_buf_no = (channel->io_buf_no + 1) %
753                                 QETH_CMD_BUFFER_NO;
754                         memset(channel->iob[index].data, 0, QETH_BUFSIZE);
755                         return channel->iob + index;
756                 }
757                 index = (index + 1) % QETH_CMD_BUFFER_NO;
758         } while (index != channel->io_buf_no);
759 
760         return NULL;
761 }
762 
763 void qeth_release_buffer(struct qeth_channel *channel,
764                 struct qeth_cmd_buffer *iob)
765 {
766         unsigned long flags;
767 
768         QETH_CARD_TEXT(CARD_FROM_CDEV(channel->ccwdev), 6, "relbuff");
769         spin_lock_irqsave(&channel->iob_lock, flags);
770         memset(iob->data, 0, QETH_BUFSIZE);
771         iob->state = BUF_STATE_FREE;
772         iob->callback = qeth_send_control_data_cb;
773         iob->rc = 0;
774         spin_unlock_irqrestore(&channel->iob_lock, flags);
775         wake_up(&channel->wait_q);
776 }
777 EXPORT_SYMBOL_GPL(qeth_release_buffer);
778 
779 static struct qeth_cmd_buffer *qeth_get_buffer(struct qeth_channel *channel)
780 {
781         struct qeth_cmd_buffer *buffer = NULL;
782         unsigned long flags;
783 
784         spin_lock_irqsave(&channel->iob_lock, flags);
785         buffer = __qeth_get_buffer(channel);
786         spin_unlock_irqrestore(&channel->iob_lock, flags);
787         return buffer;
788 }
789 
790 struct qeth_cmd_buffer *qeth_wait_for_buffer(struct qeth_channel *channel)
791 {
792         struct qeth_cmd_buffer *buffer;
793         wait_event(channel->wait_q,
794                    ((buffer = qeth_get_buffer(channel)) != NULL));
795         return buffer;
796 }
797 EXPORT_SYMBOL_GPL(qeth_wait_for_buffer);
798 
799 void qeth_clear_cmd_buffers(struct qeth_channel *channel)
800 {
801         int cnt;
802 
803         for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++)
804                 qeth_release_buffer(channel, &channel->iob[cnt]);
805         channel->buf_no = 0;
806         channel->io_buf_no = 0;
807 }
808 EXPORT_SYMBOL_GPL(qeth_clear_cmd_buffers);
809 
810 static void qeth_send_control_data_cb(struct qeth_channel *channel,
811                   struct qeth_cmd_buffer *iob)
812 {
813         struct qeth_card *card;
814         struct qeth_reply *reply, *r;
815         struct qeth_ipa_cmd *cmd;
816         unsigned long flags;
817         int keep_reply;
818         int rc = 0;
819 
820         card = CARD_FROM_CDEV(channel->ccwdev);
821         QETH_CARD_TEXT(card, 4, "sndctlcb");
822         rc = qeth_check_idx_response(card, iob->data);
823         switch (rc) {
824         case 0:
825                 break;
826         case -EIO:
827                 qeth_clear_ipacmd_list(card);
828                 qeth_schedule_recovery(card);
829                 /* fall through */
830         default:
831                 goto out;
832         }
833 
834         cmd = qeth_check_ipa_data(card, iob);
835         if ((cmd == NULL) && (card->state != CARD_STATE_DOWN))
836                 goto out;
837         /*in case of OSN : check if cmd is set */
838         if (card->info.type == QETH_CARD_TYPE_OSN &&
839             cmd &&
840             cmd->hdr.command != IPA_CMD_STARTLAN &&
841             card->osn_info.assist_cb != NULL) {
842                 card->osn_info.assist_cb(card->dev, cmd);
843                 goto out;
844         }
845 
846         spin_lock_irqsave(&card->lock, flags);
847         list_for_each_entry_safe(reply, r, &card->cmd_waiter_list, list) {
848                 if ((reply->seqno == QETH_IDX_COMMAND_SEQNO) ||
849                     ((cmd) && (reply->seqno == cmd->hdr.seqno))) {
850                         qeth_get_reply(reply);
851                         list_del_init(&reply->list);
852                         spin_unlock_irqrestore(&card->lock, flags);
853                         keep_reply = 0;
854                         if (reply->callback != NULL) {
855                                 if (cmd) {
856                                         reply->offset = (__u16)((char *)cmd -
857                                                         (char *)iob->data);
858                                         keep_reply = reply->callback(card,
859                                                         reply,
860                                                         (unsigned long)cmd);
861                                 } else
862                                         keep_reply = reply->callback(card,
863                                                         reply,
864                                                         (unsigned long)iob);
865                         }
866                         if (cmd)
867                                 reply->rc = (u16) cmd->hdr.return_code;
868                         else if (iob->rc)
869                                 reply->rc = iob->rc;
870                         if (keep_reply) {
871                                 spin_lock_irqsave(&card->lock, flags);
872                                 list_add_tail(&reply->list,
873                                               &card->cmd_waiter_list);
874                                 spin_unlock_irqrestore(&card->lock, flags);
875                         } else {
876                                 atomic_inc(&reply->received);
877                                 wake_up(&reply->wait_q);
878                         }
879                         qeth_put_reply(reply);
880                         goto out;
881                 }
882         }
883         spin_unlock_irqrestore(&card->lock, flags);
884 out:
885         memcpy(&card->seqno.pdu_hdr_ack,
886                 QETH_PDU_HEADER_SEQ_NO(iob->data),
887                 QETH_SEQ_NO_LENGTH);
888         qeth_release_buffer(channel, iob);
889 }
890 
891 static int qeth_setup_channel(struct qeth_channel *channel)
892 {
893         int cnt;
894 
895         QETH_DBF_TEXT(SETUP, 2, "setupch");
896         for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++) {
897                 channel->iob[cnt].data =
898                         kzalloc(QETH_BUFSIZE, GFP_DMA|GFP_KERNEL);
899                 if (channel->iob[cnt].data == NULL)
900                         break;
901                 channel->iob[cnt].state = BUF_STATE_FREE;
902                 channel->iob[cnt].channel = channel;
903                 channel->iob[cnt].callback = qeth_send_control_data_cb;
904                 channel->iob[cnt].rc = 0;
905         }
906         if (cnt < QETH_CMD_BUFFER_NO) {
907                 while (cnt-- > 0)
908                         kfree(channel->iob[cnt].data);
909                 return -ENOMEM;
910         }
911         channel->buf_no = 0;
912         channel->io_buf_no = 0;
913         atomic_set(&channel->irq_pending, 0);
914         spin_lock_init(&channel->iob_lock);
915 
916         init_waitqueue_head(&channel->wait_q);
917         return 0;
918 }
919 
920 static int qeth_set_thread_start_bit(struct qeth_card *card,
921                 unsigned long thread)
922 {
923         unsigned long flags;
924 
925         spin_lock_irqsave(&card->thread_mask_lock, flags);
926         if (!(card->thread_allowed_mask & thread) ||
927               (card->thread_start_mask & thread)) {
928                 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
929                 return -EPERM;
930         }
931         card->thread_start_mask |= thread;
932         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
933         return 0;
934 }
935 
936 void qeth_clear_thread_start_bit(struct qeth_card *card, unsigned long thread)
937 {
938         unsigned long flags;
939 
940         spin_lock_irqsave(&card->thread_mask_lock, flags);
941         card->thread_start_mask &= ~thread;
942         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
943         wake_up(&card->wait_q);
944 }
945 EXPORT_SYMBOL_GPL(qeth_clear_thread_start_bit);
946 
947 void qeth_clear_thread_running_bit(struct qeth_card *card, unsigned long thread)
948 {
949         unsigned long flags;
950 
951         spin_lock_irqsave(&card->thread_mask_lock, flags);
952         card->thread_running_mask &= ~thread;
953         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
954         wake_up(&card->wait_q);
955 }
956 EXPORT_SYMBOL_GPL(qeth_clear_thread_running_bit);
957 
958 static int __qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
959 {
960         unsigned long flags;
961         int rc = 0;
962 
963         spin_lock_irqsave(&card->thread_mask_lock, flags);
964         if (card->thread_start_mask & thread) {
965                 if ((card->thread_allowed_mask & thread) &&
966                     !(card->thread_running_mask & thread)) {
967                         rc = 1;
968                         card->thread_start_mask &= ~thread;
969                         card->thread_running_mask |= thread;
970                 } else
971                         rc = -EPERM;
972         }
973         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
974         return rc;
975 }
976 
977 int qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
978 {
979         int rc = 0;
980 
981         wait_event(card->wait_q,
982                    (rc = __qeth_do_run_thread(card, thread)) >= 0);
983         return rc;
984 }
985 EXPORT_SYMBOL_GPL(qeth_do_run_thread);
986 
987 void qeth_schedule_recovery(struct qeth_card *card)
988 {
989         QETH_CARD_TEXT(card, 2, "startrec");
990         if (qeth_set_thread_start_bit(card, QETH_RECOVER_THREAD) == 0)
991                 schedule_work(&card->kernel_thread_starter);
992 }
993 EXPORT_SYMBOL_GPL(qeth_schedule_recovery);
994 
995 static int qeth_get_problem(struct ccw_device *cdev, struct irb *irb)
996 {
997         int dstat, cstat;
998         char *sense;
999         struct qeth_card *card;
1000 
1001         sense = (char *) irb->ecw;
1002         cstat = irb->scsw.cmd.cstat;
1003         dstat = irb->scsw.cmd.dstat;
1004         card = CARD_FROM_CDEV(cdev);
1005 
1006         if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK |
1007                      SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK |
1008                      SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) {
1009                 QETH_CARD_TEXT(card, 2, "CGENCHK");
1010                 dev_warn(&cdev->dev, "The qeth device driver "
1011                         "failed to recover an error on the device\n");
1012                 QETH_DBF_MESSAGE(2, "%s check on device dstat=x%x, cstat=x%x\n",
1013                         dev_name(&cdev->dev), dstat, cstat);
1014                 print_hex_dump(KERN_WARNING, "qeth: irb ", DUMP_PREFIX_OFFSET,
1015                                 16, 1, irb, 64, 1);
1016                 return 1;
1017         }
1018 
1019         if (dstat & DEV_STAT_UNIT_CHECK) {
1020                 if (sense[SENSE_RESETTING_EVENT_BYTE] &
1021                     SENSE_RESETTING_EVENT_FLAG) {
1022                         QETH_CARD_TEXT(card, 2, "REVIND");
1023                         return 1;
1024                 }
1025                 if (sense[SENSE_COMMAND_REJECT_BYTE] &
1026                     SENSE_COMMAND_REJECT_FLAG) {
1027                         QETH_CARD_TEXT(card, 2, "CMDREJi");
1028                         return 1;
1029                 }
1030                 if ((sense[2] == 0xaf) && (sense[3] == 0xfe)) {
1031                         QETH_CARD_TEXT(card, 2, "AFFE");
1032                         return 1;
1033                 }
1034                 if ((!sense[0]) && (!sense[1]) && (!sense[2]) && (!sense[3])) {
1035                         QETH_CARD_TEXT(card, 2, "ZEROSEN");
1036                         return 0;
1037                 }
1038                 QETH_CARD_TEXT(card, 2, "DGENCHK");
1039                         return 1;
1040         }
1041         return 0;
1042 }
1043 
1044 static long __qeth_check_irb_error(struct ccw_device *cdev,
1045                 unsigned long intparm, struct irb *irb)
1046 {
1047         struct qeth_card *card;
1048 
1049         card = CARD_FROM_CDEV(cdev);
1050 
1051         if (!card || !IS_ERR(irb))
1052                 return 0;
1053 
1054         switch (PTR_ERR(irb)) {
1055         case -EIO:
1056                 QETH_DBF_MESSAGE(2, "%s i/o-error on device\n",
1057                         dev_name(&cdev->dev));
1058                 QETH_CARD_TEXT(card, 2, "ckirberr");
1059                 QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
1060                 break;
1061         case -ETIMEDOUT:
1062                 dev_warn(&cdev->dev, "A hardware operation timed out"
1063                         " on the device\n");
1064                 QETH_CARD_TEXT(card, 2, "ckirberr");
1065                 QETH_CARD_TEXT_(card, 2, "  rc%d", -ETIMEDOUT);
1066                 if (intparm == QETH_RCD_PARM) {
1067                         if (card->data.ccwdev == cdev) {
1068                                 card->data.state = CH_STATE_DOWN;
1069                                 wake_up(&card->wait_q);
1070                         }
1071                 }
1072                 break;
1073         default:
1074                 QETH_DBF_MESSAGE(2, "%s unknown error %ld on device\n",
1075                         dev_name(&cdev->dev), PTR_ERR(irb));
1076                 QETH_CARD_TEXT(card, 2, "ckirberr");
1077                 QETH_CARD_TEXT(card, 2, "  rc???");
1078         }
1079         return PTR_ERR(irb);
1080 }
1081 
1082 static void qeth_irq(struct ccw_device *cdev, unsigned long intparm,
1083                 struct irb *irb)
1084 {
1085         int rc;
1086         int cstat, dstat;
1087         struct qeth_cmd_buffer *buffer;
1088         struct qeth_channel *channel;
1089         struct qeth_card *card;
1090         struct qeth_cmd_buffer *iob;
1091         __u8 index;
1092 
1093         if (__qeth_check_irb_error(cdev, intparm, irb))
1094                 return;
1095         cstat = irb->scsw.cmd.cstat;
1096         dstat = irb->scsw.cmd.dstat;
1097 
1098         card = CARD_FROM_CDEV(cdev);
1099         if (!card)
1100                 return;
1101 
1102         QETH_CARD_TEXT(card, 5, "irq");
1103 
1104         if (card->read.ccwdev == cdev) {
1105                 channel = &card->read;
1106                 QETH_CARD_TEXT(card, 5, "read");
1107         } else if (card->write.ccwdev == cdev) {
1108                 channel = &card->write;
1109                 QETH_CARD_TEXT(card, 5, "write");
1110         } else {
1111                 channel = &card->data;
1112                 QETH_CARD_TEXT(card, 5, "data");
1113         }
1114         atomic_set(&channel->irq_pending, 0);
1115 
1116         if (irb->scsw.cmd.fctl & (SCSW_FCTL_CLEAR_FUNC))
1117                 channel->state = CH_STATE_STOPPED;
1118 
1119         if (irb->scsw.cmd.fctl & (SCSW_FCTL_HALT_FUNC))
1120                 channel->state = CH_STATE_HALTED;
1121 
1122         /*let's wake up immediately on data channel*/
1123         if ((channel == &card->data) && (intparm != 0) &&
1124             (intparm != QETH_RCD_PARM))
1125                 goto out;
1126 
1127         if (intparm == QETH_CLEAR_CHANNEL_PARM) {
1128                 QETH_CARD_TEXT(card, 6, "clrchpar");
1129                 /* we don't have to handle this further */
1130                 intparm = 0;
1131         }
1132         if (intparm == QETH_HALT_CHANNEL_PARM) {
1133                 QETH_CARD_TEXT(card, 6, "hltchpar");
1134                 /* we don't have to handle this further */
1135                 intparm = 0;
1136         }
1137         if ((dstat & DEV_STAT_UNIT_EXCEP) ||
1138             (dstat & DEV_STAT_UNIT_CHECK) ||
1139             (cstat)) {
1140                 if (irb->esw.esw0.erw.cons) {
1141                         dev_warn(&channel->ccwdev->dev,
1142                                 "The qeth device driver failed to recover "
1143                                 "an error on the device\n");
1144                         QETH_DBF_MESSAGE(2, "%s sense data available. cstat "
1145                                 "0x%X dstat 0x%X\n",
1146                                 dev_name(&channel->ccwdev->dev), cstat, dstat);
1147                         print_hex_dump(KERN_WARNING, "qeth: irb ",
1148                                 DUMP_PREFIX_OFFSET, 16, 1, irb, 32, 1);
1149                         print_hex_dump(KERN_WARNING, "qeth: sense data ",
1150                                 DUMP_PREFIX_OFFSET, 16, 1, irb->ecw, 32, 1);
1151                 }
1152                 if (intparm == QETH_RCD_PARM) {
1153                         channel->state = CH_STATE_DOWN;
1154                         goto out;
1155                 }
1156                 rc = qeth_get_problem(cdev, irb);
1157                 if (rc) {
1158                         qeth_clear_ipacmd_list(card);
1159                         qeth_schedule_recovery(card);
1160                         goto out;
1161                 }
1162         }
1163 
1164         if (intparm == QETH_RCD_PARM) {
1165                 channel->state = CH_STATE_RCD_DONE;
1166                 goto out;
1167         }
1168         if (intparm) {
1169                 buffer = (struct qeth_cmd_buffer *) __va((addr_t)intparm);
1170                 buffer->state = BUF_STATE_PROCESSED;
1171         }
1172         if (channel == &card->data)
1173                 return;
1174         if (channel == &card->read &&
1175             channel->state == CH_STATE_UP)
1176                 qeth_issue_next_read(card);
1177 
1178         iob = channel->iob;
1179         index = channel->buf_no;
1180         while (iob[index].state == BUF_STATE_PROCESSED) {
1181                 if (iob[index].callback != NULL)
1182                         iob[index].callback(channel, iob + index);
1183 
1184                 index = (index + 1) % QETH_CMD_BUFFER_NO;
1185         }
1186         channel->buf_no = index;
1187 out:
1188         wake_up(&card->wait_q);
1189         return;
1190 }
1191 
1192 static void qeth_notify_skbs(struct qeth_qdio_out_q *q,
1193                 struct qeth_qdio_out_buffer *buf,
1194                 enum iucv_tx_notify notification)
1195 {
1196         struct sk_buff *skb;
1197 
1198         if (skb_queue_empty(&buf->skb_list))
1199                 goto out;
1200         skb = skb_peek(&buf->skb_list);
1201         while (skb) {
1202                 QETH_CARD_TEXT_(q->card, 5, "skbn%d", notification);
1203                 QETH_CARD_TEXT_(q->card, 5, "%lx", (long) skb);
1204                 if (skb->protocol == ETH_P_AF_IUCV) {
1205                         if (skb->sk) {
1206                                 struct iucv_sock *iucv = iucv_sk(skb->sk);
1207                                 iucv->sk_txnotify(skb, notification);
1208                         }
1209                 }
1210                 if (skb_queue_is_last(&buf->skb_list, skb))
1211                         skb = NULL;
1212                 else
1213                         skb = skb_queue_next(&buf->skb_list, skb);
1214         }
1215 out:
1216         return;
1217 }
1218 
1219 static void qeth_release_skbs(struct qeth_qdio_out_buffer *buf)
1220 {
1221         struct sk_buff *skb;
1222         struct iucv_sock *iucv;
1223         int notify_general_error = 0;
1224 
1225         if (atomic_read(&buf->state) == QETH_QDIO_BUF_PENDING)
1226                 notify_general_error = 1;
1227 
1228         /* release may never happen from within CQ tasklet scope */
1229         WARN_ON_ONCE(atomic_read(&buf->state) == QETH_QDIO_BUF_IN_CQ);
1230 
1231         skb = skb_dequeue(&buf->skb_list);
1232         while (skb) {
1233                 QETH_CARD_TEXT(buf->q->card, 5, "skbr");
1234                 QETH_CARD_TEXT_(buf->q->card, 5, "%lx", (long) skb);
1235                 if (notify_general_error && skb->protocol == ETH_P_AF_IUCV) {
1236                         if (skb->sk) {
1237                                 iucv = iucv_sk(skb->sk);
1238                                 iucv->sk_txnotify(skb, TX_NOTIFY_GENERALERROR);
1239                         }
1240                 }
1241                 atomic_dec(&skb->users);
1242                 dev_kfree_skb_any(skb);
1243                 skb = skb_dequeue(&buf->skb_list);
1244         }
1245 }
1246 
1247 static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
1248                 struct qeth_qdio_out_buffer *buf,
1249                 enum qeth_qdio_buffer_states newbufstate)
1250 {
1251         int i;
1252 
1253         /* is PCI flag set on buffer? */
1254         if (buf->buffer->element[0].sflags & SBAL_SFLAGS0_PCI_REQ)
1255                 atomic_dec(&queue->set_pci_flags_count);
1256 
1257         if (newbufstate == QETH_QDIO_BUF_EMPTY) {
1258                 qeth_release_skbs(buf);
1259         }
1260         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(queue->card); ++i) {
1261                 if (buf->buffer->element[i].addr && buf->is_header[i])
1262                         kmem_cache_free(qeth_core_header_cache,
1263                                 buf->buffer->element[i].addr);
1264                 buf->is_header[i] = 0;
1265                 buf->buffer->element[i].length = 0;
1266                 buf->buffer->element[i].addr = NULL;
1267                 buf->buffer->element[i].eflags = 0;
1268                 buf->buffer->element[i].sflags = 0;
1269         }
1270         buf->buffer->element[15].eflags = 0;
1271         buf->buffer->element[15].sflags = 0;
1272         buf->next_element_to_fill = 0;
1273         atomic_set(&buf->state, newbufstate);
1274 }
1275 
1276 static void qeth_clear_outq_buffers(struct qeth_qdio_out_q *q, int free)
1277 {
1278         int j;
1279 
1280         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
1281                 if (!q->bufs[j])
1282                         continue;
1283                 qeth_cleanup_handled_pending(q, j, 1);
1284                 qeth_clear_output_buffer(q, q->bufs[j], QETH_QDIO_BUF_EMPTY);
1285                 if (free) {
1286                         kmem_cache_free(qeth_qdio_outbuf_cache, q->bufs[j]);
1287                         q->bufs[j] = NULL;
1288                 }
1289         }
1290 }
1291 
1292 void qeth_clear_qdio_buffers(struct qeth_card *card)
1293 {
1294         int i;
1295 
1296         QETH_CARD_TEXT(card, 2, "clearqdbf");
1297         /* clear outbound buffers to free skbs */
1298         for (i = 0; i < card->qdio.no_out_queues; ++i) {
1299                 if (card->qdio.out_qs[i]) {
1300                         qeth_clear_outq_buffers(card->qdio.out_qs[i], 0);
1301                 }
1302         }
1303 }
1304 EXPORT_SYMBOL_GPL(qeth_clear_qdio_buffers);
1305 
1306 static void qeth_free_buffer_pool(struct qeth_card *card)
1307 {
1308         struct qeth_buffer_pool_entry *pool_entry, *tmp;
1309         int i = 0;
1310         list_for_each_entry_safe(pool_entry, tmp,
1311                                  &card->qdio.init_pool.entry_list, init_list){
1312                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i)
1313                         free_page((unsigned long)pool_entry->elements[i]);
1314                 list_del(&pool_entry->init_list);
1315                 kfree(pool_entry);
1316         }
1317 }
1318 
1319 static void qeth_clean_channel(struct qeth_channel *channel)
1320 {
1321         int cnt;
1322 
1323         QETH_DBF_TEXT(SETUP, 2, "freech");
1324         for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++)
1325                 kfree(channel->iob[cnt].data);
1326 }
1327 
1328 static void qeth_set_single_write_queues(struct qeth_card *card)
1329 {
1330         if ((atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED) &&
1331             (card->qdio.no_out_queues == 4))
1332                 qeth_free_qdio_buffers(card);
1333 
1334         card->qdio.no_out_queues = 1;
1335         if (card->qdio.default_out_queue != 0)
1336                 dev_info(&card->gdev->dev, "Priority Queueing not supported\n");
1337 
1338         card->qdio.default_out_queue = 0;
1339 }
1340 
1341 static void qeth_set_multiple_write_queues(struct qeth_card *card)
1342 {
1343         if ((atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED) &&
1344             (card->qdio.no_out_queues == 1)) {
1345                 qeth_free_qdio_buffers(card);
1346                 card->qdio.default_out_queue = 2;
1347         }
1348         card->qdio.no_out_queues = 4;
1349 }
1350 
1351 static void qeth_update_from_chp_desc(struct qeth_card *card)
1352 {
1353         struct ccw_device *ccwdev;
1354         struct channel_path_desc *chp_dsc;
1355 
1356         QETH_DBF_TEXT(SETUP, 2, "chp_desc");
1357 
1358         ccwdev = card->data.ccwdev;
1359         chp_dsc = ccw_device_get_chp_desc(ccwdev, 0);
1360         if (!chp_dsc)
1361                 goto out;
1362 
1363         card->info.func_level = 0x4100 + chp_dsc->desc;
1364         if (card->info.type == QETH_CARD_TYPE_IQD)
1365                 goto out;
1366 
1367         /* CHPP field bit 6 == 1 -> single queue */
1368         if ((chp_dsc->chpp & 0x02) == 0x02)
1369                 qeth_set_single_write_queues(card);
1370         else
1371                 qeth_set_multiple_write_queues(card);
1372 out:
1373         kfree(chp_dsc);
1374         QETH_DBF_TEXT_(SETUP, 2, "nr:%x", card->qdio.no_out_queues);
1375         QETH_DBF_TEXT_(SETUP, 2, "lvl:%02x", card->info.func_level);
1376 }
1377 
1378 static void qeth_init_qdio_info(struct qeth_card *card)
1379 {
1380         QETH_DBF_TEXT(SETUP, 4, "intqdinf");
1381         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
1382         /* inbound */
1383         card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
1384         if (card->info.type == QETH_CARD_TYPE_IQD)
1385                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_HSDEFAULT;
1386         else
1387                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_DEFAULT;
1388         card->qdio.in_buf_pool.buf_count = card->qdio.init_pool.buf_count;
1389         INIT_LIST_HEAD(&card->qdio.in_buf_pool.entry_list);
1390         INIT_LIST_HEAD(&card->qdio.init_pool.entry_list);
1391 }
1392 
1393 static void qeth_set_intial_options(struct qeth_card *card)
1394 {
1395         card->options.route4.type = NO_ROUTER;
1396         card->options.route6.type = NO_ROUTER;
1397         card->options.fake_broadcast = 0;
1398         card->options.add_hhlen = DEFAULT_ADD_HHLEN;
1399         card->options.performance_stats = 0;
1400         card->options.rx_sg_cb = QETH_RX_SG_CB;
1401         card->options.isolation = ISOLATION_MODE_NONE;
1402         card->options.cq = QETH_CQ_DISABLED;
1403 }
1404 
1405 static int qeth_do_start_thread(struct qeth_card *card, unsigned long thread)
1406 {
1407         unsigned long flags;
1408         int rc = 0;
1409 
1410         spin_lock_irqsave(&card->thread_mask_lock, flags);
1411         QETH_CARD_TEXT_(card, 4, "  %02x%02x%02x",
1412                         (u8) card->thread_start_mask,
1413                         (u8) card->thread_allowed_mask,
1414                         (u8) card->thread_running_mask);
1415         rc = (card->thread_start_mask & thread);
1416         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1417         return rc;
1418 }
1419 
1420 static void qeth_start_kernel_thread(struct work_struct *work)
1421 {
1422         struct task_struct *ts;
1423         struct qeth_card *card = container_of(work, struct qeth_card,
1424                                         kernel_thread_starter);
1425         QETH_CARD_TEXT(card , 2, "strthrd");
1426 
1427         if (card->read.state != CH_STATE_UP &&
1428             card->write.state != CH_STATE_UP)
1429                 return;
1430         if (qeth_do_start_thread(card, QETH_RECOVER_THREAD)) {
1431                 ts = kthread_run(card->discipline->recover, (void *)card,
1432                                 "qeth_recover");
1433                 if (IS_ERR(ts)) {
1434                         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1435                         qeth_clear_thread_running_bit(card,
1436                                 QETH_RECOVER_THREAD);
1437                 }
1438         }
1439 }
1440 
1441 static void qeth_buffer_reclaim_work(struct work_struct *);
1442 static int qeth_setup_card(struct qeth_card *card)
1443 {
1444 
1445         QETH_DBF_TEXT(SETUP, 2, "setupcrd");
1446         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1447 
1448         card->read.state  = CH_STATE_DOWN;
1449         card->write.state = CH_STATE_DOWN;
1450         card->data.state  = CH_STATE_DOWN;
1451         card->state = CARD_STATE_DOWN;
1452         card->lan_online = 0;
1453         card->read_or_write_problem = 0;
1454         card->dev = NULL;
1455         spin_lock_init(&card->vlanlock);
1456         spin_lock_init(&card->mclock);
1457         spin_lock_init(&card->lock);
1458         spin_lock_init(&card->ip_lock);
1459         spin_lock_init(&card->thread_mask_lock);
1460         mutex_init(&card->conf_mutex);
1461         mutex_init(&card->discipline_mutex);
1462         card->thread_start_mask = 0;
1463         card->thread_allowed_mask = 0;
1464         card->thread_running_mask = 0;
1465         INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread);
1466         INIT_LIST_HEAD(&card->ip_list);
1467         INIT_LIST_HEAD(card->ip_tbd_list);
1468         INIT_LIST_HEAD(&card->cmd_waiter_list);
1469         init_waitqueue_head(&card->wait_q);
1470         /* initial options */
1471         qeth_set_intial_options(card);
1472         /* IP address takeover */
1473         INIT_LIST_HEAD(&card->ipato.entries);
1474         card->ipato.enabled = 0;
1475         card->ipato.invert4 = 0;
1476         card->ipato.invert6 = 0;
1477         /* init QDIO stuff */
1478         qeth_init_qdio_info(card);
1479         INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work);
1480         INIT_WORK(&card->close_dev_work, qeth_close_dev_handler);
1481         return 0;
1482 }
1483 
1484 static void qeth_core_sl_print(struct seq_file *m, struct service_level *slr)
1485 {
1486         struct qeth_card *card = container_of(slr, struct qeth_card,
1487                                         qeth_service_level);
1488         if (card->info.mcl_level[0])
1489                 seq_printf(m, "qeth: %s firmware level %s\n",
1490                         CARD_BUS_ID(card), card->info.mcl_level);
1491 }
1492 
1493 static struct qeth_card *qeth_alloc_card(void)
1494 {
1495         struct qeth_card *card;
1496 
1497         QETH_DBF_TEXT(SETUP, 2, "alloccrd");
1498         card = kzalloc(sizeof(struct qeth_card), GFP_DMA|GFP_KERNEL);
1499         if (!card)
1500                 goto out;
1501         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1502         card->ip_tbd_list = kzalloc(sizeof(struct list_head), GFP_KERNEL);
1503         if (!card->ip_tbd_list) {
1504                 QETH_DBF_TEXT(SETUP, 0, "iptbdnom");
1505                 goto out_card;
1506         }
1507         if (qeth_setup_channel(&card->read))
1508                 goto out_ip;
1509         if (qeth_setup_channel(&card->write))
1510                 goto out_channel;
1511         card->options.layer2 = -1;
1512         card->qeth_service_level.seq_print = qeth_core_sl_print;
1513         register_service_level(&card->qeth_service_level);
1514         return card;
1515 
1516 out_channel:
1517         qeth_clean_channel(&card->read);
1518 out_ip:
1519         kfree(card->ip_tbd_list);
1520 out_card:
1521         kfree(card);
1522 out:
1523         return NULL;
1524 }
1525 
1526 static int qeth_determine_card_type(struct qeth_card *card)
1527 {
1528         int i = 0;
1529 
1530         QETH_DBF_TEXT(SETUP, 2, "detcdtyp");
1531 
1532         card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT;
1533         card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
1534         while (known_devices[i][QETH_DEV_MODEL_IND]) {
1535                 if ((CARD_RDEV(card)->id.dev_type ==
1536                                 known_devices[i][QETH_DEV_TYPE_IND]) &&
1537                     (CARD_RDEV(card)->id.dev_model ==
1538                                 known_devices[i][QETH_DEV_MODEL_IND])) {
1539                         card->info.type = known_devices[i][QETH_DEV_MODEL_IND];
1540                         card->qdio.no_out_queues =
1541                                 known_devices[i][QETH_QUEUE_NO_IND];
1542                         card->qdio.no_in_queues = 1;
1543                         card->info.is_multicast_different =
1544                                 known_devices[i][QETH_MULTICAST_IND];
1545                         qeth_update_from_chp_desc(card);
1546                         return 0;
1547                 }
1548                 i++;
1549         }
1550         card->info.type = QETH_CARD_TYPE_UNKNOWN;
1551         dev_err(&card->gdev->dev, "The adapter hardware is of an "
1552                 "unknown type\n");
1553         return -ENOENT;
1554 }
1555 
1556 static int qeth_clear_channel(struct qeth_channel *channel)
1557 {
1558         unsigned long flags;
1559         struct qeth_card *card;
1560         int rc;
1561 
1562         card = CARD_FROM_CDEV(channel->ccwdev);
1563         QETH_CARD_TEXT(card, 3, "clearch");
1564         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1565         rc = ccw_device_clear(channel->ccwdev, QETH_CLEAR_CHANNEL_PARM);
1566         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1567 
1568         if (rc)
1569                 return rc;
1570         rc = wait_event_interruptible_timeout(card->wait_q,
1571                         channel->state == CH_STATE_STOPPED, QETH_TIMEOUT);
1572         if (rc == -ERESTARTSYS)
1573                 return rc;
1574         if (channel->state != CH_STATE_STOPPED)
1575                 return -ETIME;
1576         channel->state = CH_STATE_DOWN;
1577         return 0;
1578 }
1579 
1580 static int qeth_halt_channel(struct qeth_channel *channel)
1581 {
1582         unsigned long flags;
1583         struct qeth_card *card;
1584         int rc;
1585 
1586         card = CARD_FROM_CDEV(channel->ccwdev);
1587         QETH_CARD_TEXT(card, 3, "haltch");
1588         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1589         rc = ccw_device_halt(channel->ccwdev, QETH_HALT_CHANNEL_PARM);
1590         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1591 
1592         if (rc)
1593                 return rc;
1594         rc = wait_event_interruptible_timeout(card->wait_q,
1595                         channel->state == CH_STATE_HALTED, QETH_TIMEOUT);
1596         if (rc == -ERESTARTSYS)
1597                 return rc;
1598         if (channel->state != CH_STATE_HALTED)
1599                 return -ETIME;
1600         return 0;
1601 }
1602 
1603 static int qeth_halt_channels(struct qeth_card *card)
1604 {
1605         int rc1 = 0, rc2 = 0, rc3 = 0;
1606 
1607         QETH_CARD_TEXT(card, 3, "haltchs");
1608         rc1 = qeth_halt_channel(&card->read);
1609         rc2 = qeth_halt_channel(&card->write);
1610         rc3 = qeth_halt_channel(&card->data);
1611         if (rc1)
1612                 return rc1;
1613         if (rc2)
1614                 return rc2;
1615         return rc3;
1616 }
1617 
1618 static int qeth_clear_channels(struct qeth_card *card)
1619 {
1620         int rc1 = 0, rc2 = 0, rc3 = 0;
1621 
1622         QETH_CARD_TEXT(card, 3, "clearchs");
1623         rc1 = qeth_clear_channel(&card->read);
1624         rc2 = qeth_clear_channel(&card->write);
1625         rc3 = qeth_clear_channel(&card->data);
1626         if (rc1)
1627                 return rc1;
1628         if (rc2)
1629                 return rc2;
1630         return rc3;
1631 }
1632 
1633 static int qeth_clear_halt_card(struct qeth_card *card, int halt)
1634 {
1635         int rc = 0;
1636 
1637         QETH_CARD_TEXT(card, 3, "clhacrd");
1638 
1639         if (halt)
1640                 rc = qeth_halt_channels(card);
1641         if (rc)
1642                 return rc;
1643         return qeth_clear_channels(card);
1644 }
1645 
1646 int qeth_qdio_clear_card(struct qeth_card *card, int use_halt)
1647 {
1648         int rc = 0;
1649 
1650         QETH_CARD_TEXT(card, 3, "qdioclr");
1651         switch (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ESTABLISHED,
1652                 QETH_QDIO_CLEANING)) {
1653         case QETH_QDIO_ESTABLISHED:
1654                 if (card->info.type == QETH_CARD_TYPE_IQD)
1655                         rc = qdio_shutdown(CARD_DDEV(card),
1656                                 QDIO_FLAG_CLEANUP_USING_HALT);
1657                 else
1658                         rc = qdio_shutdown(CARD_DDEV(card),
1659                                 QDIO_FLAG_CLEANUP_USING_CLEAR);
1660                 if (rc)
1661                         QETH_CARD_TEXT_(card, 3, "1err%d", rc);
1662                 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
1663                 break;
1664         case QETH_QDIO_CLEANING:
1665                 return rc;
1666         default:
1667                 break;
1668         }
1669         rc = qeth_clear_halt_card(card, use_halt);
1670         if (rc)
1671                 QETH_CARD_TEXT_(card, 3, "2err%d", rc);
1672         card->state = CARD_STATE_DOWN;
1673         return rc;
1674 }
1675 EXPORT_SYMBOL_GPL(qeth_qdio_clear_card);
1676 
1677 static int qeth_read_conf_data(struct qeth_card *card, void **buffer,
1678                                int *length)
1679 {
1680         struct ciw *ciw;
1681         char *rcd_buf;
1682         int ret;
1683         struct qeth_channel *channel = &card->data;
1684         unsigned long flags;
1685 
1686         /*
1687          * scan for RCD command in extended SenseID data
1688          */
1689         ciw = ccw_device_get_ciw(channel->ccwdev, CIW_TYPE_RCD);
1690         if (!ciw || ciw->cmd == 0)
1691                 return -EOPNOTSUPP;
1692         rcd_buf = kzalloc(ciw->count, GFP_KERNEL | GFP_DMA);
1693         if (!rcd_buf)
1694                 return -ENOMEM;
1695 
1696         channel->ccw.cmd_code = ciw->cmd;
1697         channel->ccw.cda = (__u32) __pa(rcd_buf);
1698         channel->ccw.count = ciw->count;
1699         channel->ccw.flags = CCW_FLAG_SLI;
1700         channel->state = CH_STATE_RCD;
1701         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1702         ret = ccw_device_start_timeout(channel->ccwdev, &channel->ccw,
1703                                        QETH_RCD_PARM, LPM_ANYPATH, 0,
1704                                        QETH_RCD_TIMEOUT);
1705         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1706         if (!ret)
1707                 wait_event(card->wait_q,
1708                            (channel->state == CH_STATE_RCD_DONE ||
1709                             channel->state == CH_STATE_DOWN));
1710         if (channel->state == CH_STATE_DOWN)
1711                 ret = -EIO;
1712         else
1713                 channel->state = CH_STATE_DOWN;
1714         if (ret) {
1715                 kfree(rcd_buf);
1716                 *buffer = NULL;
1717                 *length = 0;
1718         } else {
1719                 *length = ciw->count;
1720                 *buffer = rcd_buf;
1721         }
1722         return ret;
1723 }
1724 
1725 static void qeth_configure_unitaddr(struct qeth_card *card, char *prcd)
1726 {
1727         QETH_DBF_TEXT(SETUP, 2, "cfgunit");
1728         card->info.chpid = prcd[30];
1729         card->info.unit_addr2 = prcd[31];
1730         card->info.cula = prcd[63];
1731         card->info.guestlan = ((prcd[0x10] == _ascebc['V']) &&
1732                                (prcd[0x11] == _ascebc['M']));
1733 }
1734 
1735 static void qeth_configure_blkt_default(struct qeth_card *card, char *prcd)
1736 {
1737         QETH_DBF_TEXT(SETUP, 2, "cfgblkt");
1738 
1739         if (prcd[74] == 0xF0 && prcd[75] == 0xF0 &&
1740             prcd[76] >= 0xF1 && prcd[76] <= 0xF4) {
1741                 card->info.blkt.time_total = 0;
1742                 card->info.blkt.inter_packet = 0;
1743                 card->info.blkt.inter_packet_jumbo = 0;
1744         } else {
1745                 card->info.blkt.time_total = 250;
1746                 card->info.blkt.inter_packet = 5;
1747                 card->info.blkt.inter_packet_jumbo = 15;
1748         }
1749 }
1750 
1751 static void qeth_init_tokens(struct qeth_card *card)
1752 {
1753         card->token.issuer_rm_w = 0x00010103UL;
1754         card->token.cm_filter_w = 0x00010108UL;
1755         card->token.cm_connection_w = 0x0001010aUL;
1756         card->token.ulp_filter_w = 0x0001010bUL;
1757         card->token.ulp_connection_w = 0x0001010dUL;
1758 }
1759 
1760 static void qeth_init_func_level(struct qeth_card *card)
1761 {
1762         switch (card->info.type) {
1763         case QETH_CARD_TYPE_IQD:
1764                 card->info.func_level = QETH_IDX_FUNC_LEVEL_IQD;
1765                 break;
1766         case QETH_CARD_TYPE_OSD:
1767         case QETH_CARD_TYPE_OSN:
1768                 card->info.func_level = QETH_IDX_FUNC_LEVEL_OSD;
1769                 break;
1770         default:
1771                 break;
1772         }
1773 }
1774 
1775 static int qeth_idx_activate_get_answer(struct qeth_channel *channel,
1776                 void (*idx_reply_cb)(struct qeth_channel *,
1777                         struct qeth_cmd_buffer *))
1778 {
1779         struct qeth_cmd_buffer *iob;
1780         unsigned long flags;
1781         int rc;
1782         struct qeth_card *card;
1783 
1784         QETH_DBF_TEXT(SETUP, 2, "idxanswr");
1785         card = CARD_FROM_CDEV(channel->ccwdev);
1786         iob = qeth_get_buffer(channel);
1787         if (!iob)
1788                 return -ENOMEM;
1789         iob->callback = idx_reply_cb;
1790         memcpy(&channel->ccw, READ_CCW, sizeof(struct ccw1));
1791         channel->ccw.count = QETH_BUFSIZE;
1792         channel->ccw.cda = (__u32) __pa(iob->data);
1793 
1794         wait_event(card->wait_q,
1795                    atomic_cmpxchg(&channel->irq_pending, 0, 1) == 0);
1796         QETH_DBF_TEXT(SETUP, 6, "noirqpnd");
1797         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1798         rc = ccw_device_start(channel->ccwdev,
1799                               &channel->ccw, (addr_t) iob, 0, 0);
1800         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1801 
1802         if (rc) {
1803                 QETH_DBF_MESSAGE(2, "Error2 in activating channel rc=%d\n", rc);
1804                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
1805                 atomic_set(&channel->irq_pending, 0);
1806                 wake_up(&card->wait_q);
1807                 return rc;
1808         }
1809         rc = wait_event_interruptible_timeout(card->wait_q,
1810                          channel->state == CH_STATE_UP, QETH_TIMEOUT);
1811         if (rc == -ERESTARTSYS)
1812                 return rc;
1813         if (channel->state != CH_STATE_UP) {
1814                 rc = -ETIME;
1815                 QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
1816                 qeth_clear_cmd_buffers(channel);
1817         } else
1818                 rc = 0;
1819         return rc;
1820 }
1821 
1822 static int qeth_idx_activate_channel(struct qeth_channel *channel,
1823                 void (*idx_reply_cb)(struct qeth_channel *,
1824                         struct qeth_cmd_buffer *))
1825 {
1826         struct qeth_card *card;
1827         struct qeth_cmd_buffer *iob;
1828         unsigned long flags;
1829         __u16 temp;
1830         __u8 tmp;
1831         int rc;
1832         struct ccw_dev_id temp_devid;
1833 
1834         card = CARD_FROM_CDEV(channel->ccwdev);
1835 
1836         QETH_DBF_TEXT(SETUP, 2, "idxactch");
1837 
1838         iob = qeth_get_buffer(channel);
1839         if (!iob)
1840                 return -ENOMEM;
1841         iob->callback = idx_reply_cb;
1842         memcpy(&channel->ccw, WRITE_CCW, sizeof(struct ccw1));
1843         channel->ccw.count = IDX_ACTIVATE_SIZE;
1844         channel->ccw.cda = (__u32) __pa(iob->data);
1845         if (channel == &card->write) {
1846                 memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE);
1847                 memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data),
1848                        &card->seqno.trans_hdr, QETH_SEQ_NO_LENGTH);
1849                 card->seqno.trans_hdr++;
1850         } else {
1851                 memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE);
1852                 memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data),
1853                        &card->seqno.trans_hdr, QETH_SEQ_NO_LENGTH);
1854         }
1855         tmp = ((__u8)card->info.portno) | 0x80;
1856         memcpy(QETH_IDX_ACT_PNO(iob->data), &tmp, 1);
1857         memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
1858                &card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH);
1859         memcpy(QETH_IDX_ACT_FUNC_LEVEL(iob->data),
1860                &card->info.func_level, sizeof(__u16));
1861         ccw_device_get_id(CARD_DDEV(card), &temp_devid);
1862         memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &temp_devid.devno, 2);
1863         temp = (card->info.cula << 8) + card->info.unit_addr2;
1864         memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &temp, 2);
1865 
1866         wait_event(card->wait_q,
1867                    atomic_cmpxchg(&channel->irq_pending, 0, 1) == 0);
1868         QETH_DBF_TEXT(SETUP, 6, "noirqpnd");
1869         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1870         rc = ccw_device_start(channel->ccwdev,
1871                               &channel->ccw, (addr_t) iob, 0, 0);
1872         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1873 
1874         if (rc) {
1875                 QETH_DBF_MESSAGE(2, "Error1 in activating channel. rc=%d\n",
1876                         rc);
1877                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1878                 atomic_set(&channel->irq_pending, 0);
1879                 wake_up(&card->wait_q);
1880                 return rc;
1881         }
1882         rc = wait_event_interruptible_timeout(card->wait_q,
1883                         channel->state == CH_STATE_ACTIVATING, QETH_TIMEOUT);
1884         if (rc == -ERESTARTSYS)
1885                 return rc;
1886         if (channel->state != CH_STATE_ACTIVATING) {
1887                 dev_warn(&channel->ccwdev->dev, "The qeth device driver"
1888                         " failed to recover an error on the device\n");
1889                 QETH_DBF_MESSAGE(2, "%s IDX activate timed out\n",
1890                         dev_name(&channel->ccwdev->dev));
1891                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", -ETIME);
1892                 qeth_clear_cmd_buffers(channel);
1893                 return -ETIME;
1894         }
1895         return qeth_idx_activate_get_answer(channel, idx_reply_cb);
1896 }
1897 
1898 static int qeth_peer_func_level(int level)
1899 {
1900         if ((level & 0xff) == 8)
1901                 return (level & 0xff) + 0x400;
1902         if (((level >> 8) & 3) == 1)
1903                 return (level & 0xff) + 0x200;
1904         return level;
1905 }
1906 
1907 static void qeth_idx_write_cb(struct qeth_channel *channel,
1908                 struct qeth_cmd_buffer *iob)
1909 {
1910         struct qeth_card *card;
1911         __u16 temp;
1912 
1913         QETH_DBF_TEXT(SETUP , 2, "idxwrcb");
1914 
1915         if (channel->state == CH_STATE_DOWN) {
1916                 channel->state = CH_STATE_ACTIVATING;
1917                 goto out;
1918         }
1919         card = CARD_FROM_CDEV(channel->ccwdev);
1920 
1921         if (!(QETH_IS_IDX_ACT_POS_REPLY(iob->data))) {
1922                 if (QETH_IDX_ACT_CAUSE_CODE(iob->data) == QETH_IDX_ACT_ERR_EXCL)
1923                         dev_err(&card->write.ccwdev->dev,
1924                                 "The adapter is used exclusively by another "
1925                                 "host\n");
1926                 else
1927                         QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on write channel:"
1928                                 " negative reply\n",
1929                                 dev_name(&card->write.ccwdev->dev));
1930                 goto out;
1931         }
1932         memcpy(&temp, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
1933         if ((temp & ~0x0100) != qeth_peer_func_level(card->info.func_level)) {
1934                 QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on write channel: "
1935                         "function level mismatch (sent: 0x%x, received: "
1936                         "0x%x)\n", dev_name(&card->write.ccwdev->dev),
1937                         card->info.func_level, temp);
1938                 goto out;
1939         }
1940         channel->state = CH_STATE_UP;
1941 out:
1942         qeth_release_buffer(channel, iob);
1943 }
1944 
1945 static void qeth_idx_read_cb(struct qeth_channel *channel,
1946                 struct qeth_cmd_buffer *iob)
1947 {
1948         struct qeth_card *card;
1949         __u16 temp;
1950 
1951         QETH_DBF_TEXT(SETUP , 2, "idxrdcb");
1952         if (channel->state == CH_STATE_DOWN) {
1953                 channel->state = CH_STATE_ACTIVATING;
1954                 goto out;
1955         }
1956 
1957         card = CARD_FROM_CDEV(channel->ccwdev);
1958         if (qeth_check_idx_response(card, iob->data))
1959                         goto out;
1960 
1961         if (!(QETH_IS_IDX_ACT_POS_REPLY(iob->data))) {
1962                 switch (QETH_IDX_ACT_CAUSE_CODE(iob->data)) {
1963                 case QETH_IDX_ACT_ERR_EXCL:
1964                         dev_err(&card->write.ccwdev->dev,
1965                                 "The adapter is used exclusively by another "
1966                                 "host\n");
1967                         break;
1968                 case QETH_IDX_ACT_ERR_AUTH:
1969                 case QETH_IDX_ACT_ERR_AUTH_USER:
1970                         dev_err(&card->read.ccwdev->dev,
1971                                 "Setting the device online failed because of "
1972                                 "insufficient authorization\n");
1973                         break;
1974                 default:
1975                         QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on read channel:"
1976                                 " negative reply\n",
1977                                 dev_name(&card->read.ccwdev->dev));
1978                 }
1979                 QETH_CARD_TEXT_(card, 2, "idxread%c",
1980                         QETH_IDX_ACT_CAUSE_CODE(iob->data));
1981                 goto out;
1982         }
1983 
1984 /**
1985  *  * temporary fix for microcode bug
1986  *   * to revert it,replace OR by AND
1987  *    */
1988         if ((!QETH_IDX_NO_PORTNAME_REQUIRED(iob->data)) ||
1989              (card->info.type == QETH_CARD_TYPE_OSD))
1990                 card->info.portname_required = 1;
1991 
1992         memcpy(&temp, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
1993         if (temp != qeth_peer_func_level(card->info.func_level)) {
1994                 QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on read channel: function "
1995                         "level mismatch (sent: 0x%x, received: 0x%x)\n",
1996                         dev_name(&card->read.ccwdev->dev),
1997                         card->info.func_level, temp);
1998                 goto out;
1999         }
2000         memcpy(&card->token.issuer_rm_r,
2001                QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2002                QETH_MPC_TOKEN_LENGTH);
2003         memcpy(&card->info.mcl_level[0],
2004                QETH_IDX_REPLY_LEVEL(iob->data), QETH_MCL_LENGTH);
2005         channel->state = CH_STATE_UP;
2006 out:
2007         qeth_release_buffer(channel, iob);
2008 }
2009 
2010 void qeth_prepare_control_data(struct qeth_card *card, int len,
2011                 struct qeth_cmd_buffer *iob)
2012 {
2013         qeth_setup_ccw(&card->write, iob->data, len);
2014         iob->callback = qeth_release_buffer;
2015 
2016         memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data),
2017                &card->seqno.trans_hdr, QETH_SEQ_NO_LENGTH);
2018         card->seqno.trans_hdr++;
2019         memcpy(QETH_PDU_HEADER_SEQ_NO(iob->data),
2020                &card->seqno.pdu_hdr, QETH_SEQ_NO_LENGTH);
2021         card->seqno.pdu_hdr++;
2022         memcpy(QETH_PDU_HEADER_ACK_SEQ_NO(iob->data),
2023                &card->seqno.pdu_hdr_ack, QETH_SEQ_NO_LENGTH);
2024         QETH_DBF_HEX(CTRL, 2, iob->data, QETH_DBF_CTRL_LEN);
2025 }
2026 EXPORT_SYMBOL_GPL(qeth_prepare_control_data);
2027 
2028 /**
2029  * qeth_send_control_data() -   send control command to the card
2030  * @card:                       qeth_card structure pointer
2031  * @len:                        size of the command buffer
2032  * @iob:                        qeth_cmd_buffer pointer
2033  * @reply_cb:                   callback function pointer
2034  * @cb_card:                    pointer to the qeth_card structure
2035  * @cb_reply:                   pointer to the qeth_reply structure
2036  * @cb_cmd:                     pointer to the original iob for non-IPA
2037  *                              commands, or to the qeth_ipa_cmd structure
2038  *                              for the IPA commands.
2039  * @reply_param:                private pointer passed to the callback
2040  *
2041  * Returns the value of the `return_code' field of the response
2042  * block returned from the hardware, or other error indication.
2043  * Value of zero indicates successful execution of the command.
2044  *
2045  * Callback function gets called one or more times, with cb_cmd
2046  * pointing to the response returned by the hardware. Callback
2047  * function must return non-zero if more reply blocks are expected,
2048  * and zero if the last or only reply block is received. Callback
2049  * function can get the value of the reply_param pointer from the
2050  * field 'param' of the structure qeth_reply.
2051  */
2052 
2053 int qeth_send_control_data(struct qeth_card *card, int len,
2054                 struct qeth_cmd_buffer *iob,
2055                 int (*reply_cb)(struct qeth_card *cb_card,
2056                                 struct qeth_reply *cb_reply,
2057                                 unsigned long cb_cmd),
2058                 void *reply_param)
2059 {
2060         int rc;
2061         unsigned long flags;
2062         struct qeth_reply *reply = NULL;
2063         unsigned long timeout, event_timeout;
2064         struct qeth_ipa_cmd *cmd;
2065 
2066         QETH_CARD_TEXT(card, 2, "sendctl");
2067 
2068         if (card->read_or_write_problem) {
2069                 qeth_release_buffer(iob->channel, iob);
2070                 return -EIO;
2071         }
2072         reply = qeth_alloc_reply(card);
2073         if (!reply) {
2074                 return -ENOMEM;
2075         }
2076         reply->callback = reply_cb;
2077         reply->param = reply_param;
2078         if (card->state == CARD_STATE_DOWN)
2079                 reply->seqno = QETH_IDX_COMMAND_SEQNO;
2080         else
2081                 reply->seqno = card->seqno.ipa++;
2082         init_waitqueue_head(&reply->wait_q);
2083         spin_lock_irqsave(&card->lock, flags);
2084         list_add_tail(&reply->list, &card->cmd_waiter_list);
2085         spin_unlock_irqrestore(&card->lock, flags);
2086         QETH_DBF_HEX(CTRL, 2, iob->data, QETH_DBF_CTRL_LEN);
2087 
2088         while (atomic_cmpxchg(&card->write.irq_pending, 0, 1)) ;
2089         qeth_prepare_control_data(card, len, iob);
2090 
2091         if (IS_IPA(iob->data))
2092                 event_timeout = QETH_IPA_TIMEOUT;
2093         else
2094                 event_timeout = QETH_TIMEOUT;
2095         timeout = jiffies + event_timeout;
2096 
2097         QETH_CARD_TEXT(card, 6, "noirqpnd");
2098         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
2099         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
2100                               (addr_t) iob, 0, 0);
2101         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
2102         if (rc) {
2103                 QETH_DBF_MESSAGE(2, "%s qeth_send_control_data: "
2104                         "ccw_device_start rc = %i\n",
2105                         dev_name(&card->write.ccwdev->dev), rc);
2106                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
2107                 spin_lock_irqsave(&card->lock, flags);
2108                 list_del_init(&reply->list);
2109                 qeth_put_reply(reply);
2110                 spin_unlock_irqrestore(&card->lock, flags);
2111                 qeth_release_buffer(iob->channel, iob);
2112                 atomic_set(&card->write.irq_pending, 0);
2113                 wake_up(&card->wait_q);
2114                 return rc;
2115         }
2116 
2117         /* we have only one long running ipassist, since we can ensure
2118            process context of this command we can sleep */
2119         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
2120         if ((cmd->hdr.command == IPA_CMD_SETIP) &&
2121             (cmd->hdr.prot_version == QETH_PROT_IPV4)) {
2122                 if (!wait_event_timeout(reply->wait_q,
2123                     atomic_read(&reply->received), event_timeout))
2124                         goto time_err;
2125         } else {
2126                 while (!atomic_read(&reply->received)) {
2127                         if (time_after(jiffies, timeout))
2128                                 goto time_err;
2129                         cpu_relax();
2130                 }
2131         }
2132 
2133         if (reply->rc == -EIO)
2134                 goto error;
2135         rc = reply->rc;
2136         qeth_put_reply(reply);
2137         return rc;
2138 
2139 time_err:
2140         reply->rc = -ETIME;
2141         spin_lock_irqsave(&reply->card->lock, flags);
2142         list_del_init(&reply->list);
2143         spin_unlock_irqrestore(&reply->card->lock, flags);
2144         atomic_inc(&reply->received);
2145 error:
2146         atomic_set(&card->write.irq_pending, 0);
2147         qeth_release_buffer(iob->channel, iob);
2148         card->write.buf_no = (card->write.buf_no + 1) % QETH_CMD_BUFFER_NO;
2149         rc = reply->rc;
2150         qeth_put_reply(reply);
2151         return rc;
2152 }
2153 EXPORT_SYMBOL_GPL(qeth_send_control_data);
2154 
2155 static int qeth_cm_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2156                 unsigned long data)
2157 {
2158         struct qeth_cmd_buffer *iob;
2159 
2160         QETH_DBF_TEXT(SETUP, 2, "cmenblcb");
2161 
2162         iob = (struct qeth_cmd_buffer *) data;
2163         memcpy(&card->token.cm_filter_r,
2164                QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data),
2165                QETH_MPC_TOKEN_LENGTH);
2166         QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
2167         return 0;
2168 }
2169 
2170 static int qeth_cm_enable(struct qeth_card *card)
2171 {
2172         int rc;
2173         struct qeth_cmd_buffer *iob;
2174 
2175         QETH_DBF_TEXT(SETUP, 2, "cmenable");
2176 
2177         iob = qeth_wait_for_buffer(&card->write);
2178         memcpy(iob->data, CM_ENABLE, CM_ENABLE_SIZE);
2179         memcpy(QETH_CM_ENABLE_ISSUER_RM_TOKEN(iob->data),
2180                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2181         memcpy(QETH_CM_ENABLE_FILTER_TOKEN(iob->data),
2182                &card->token.cm_filter_w, QETH_MPC_TOKEN_LENGTH);
2183 
2184         rc = qeth_send_control_data(card, CM_ENABLE_SIZE, iob,
2185                                     qeth_cm_enable_cb, NULL);
2186         return rc;
2187 }
2188 
2189 static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2190                 unsigned long data)
2191 {
2192 
2193         struct qeth_cmd_buffer *iob;
2194 
2195         QETH_DBF_TEXT(SETUP, 2, "cmsetpcb");
2196 
2197         iob = (struct qeth_cmd_buffer *) data;
2198         memcpy(&card->token.cm_connection_r,
2199                QETH_CM_SETUP_RESP_DEST_ADDR(iob->data),
2200                QETH_MPC_TOKEN_LENGTH);
2201         QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
2202         return 0;
2203 }
2204 
2205 static int qeth_cm_setup(struct qeth_card *card)
2206 {
2207         int rc;
2208         struct qeth_cmd_buffer *iob;
2209 
2210         QETH_DBF_TEXT(SETUP, 2, "cmsetup");
2211 
2212         iob = qeth_wait_for_buffer(&card->write);
2213         memcpy(iob->data, CM_SETUP, CM_SETUP_SIZE);
2214         memcpy(QETH_CM_SETUP_DEST_ADDR(iob->data),
2215                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2216         memcpy(QETH_CM_SETUP_CONNECTION_TOKEN(iob->data),
2217                &card->token.cm_connection_w, QETH_MPC_TOKEN_LENGTH);
2218         memcpy(QETH_CM_SETUP_FILTER_TOKEN(iob->data),
2219                &card->token.cm_filter_r, QETH_MPC_TOKEN_LENGTH);
2220         rc = qeth_send_control_data(card, CM_SETUP_SIZE, iob,
2221                                     qeth_cm_setup_cb, NULL);
2222         return rc;
2223 
2224 }
2225 
2226 static inline int qeth_get_initial_mtu_for_card(struct qeth_card *card)
2227 {
2228         switch (card->info.type) {
2229         case QETH_CARD_TYPE_UNKNOWN:
2230                 return 1500;
2231         case QETH_CARD_TYPE_IQD:
2232                 return card->info.max_mtu;
2233         case QETH_CARD_TYPE_OSD:
2234                 switch (card->info.link_type) {
2235                 case QETH_LINK_TYPE_HSTR:
2236                 case QETH_LINK_TYPE_LANE_TR:
2237                         return 2000;
2238                 default:
2239                         return card->options.layer2 ? 1500 : 1492;
2240                 }
2241         case QETH_CARD_TYPE_OSM:
2242         case QETH_CARD_TYPE_OSX:
2243                 return card->options.layer2 ? 1500 : 1492;
2244         default:
2245                 return 1500;
2246         }
2247 }
2248 
2249 static inline int qeth_get_mtu_outof_framesize(int framesize)
2250 {
2251         switch (framesize) {
2252         case 0x4000:
2253                 return 8192;
2254         case 0x6000:
2255                 return 16384;
2256         case 0xa000:
2257                 return 32768;
2258         case 0xffff:
2259                 return 57344;
2260         default:
2261                 return 0;
2262         }
2263 }
2264 
2265 static inline int qeth_mtu_is_valid(struct qeth_card *card, int mtu)
2266 {
2267         switch (card->info.type) {
2268         case QETH_CARD_TYPE_OSD:
2269         case QETH_CARD_TYPE_OSM:
2270         case QETH_CARD_TYPE_OSX:
2271         case QETH_CARD_TYPE_IQD:
2272                 return ((mtu >= 576) &&
2273                         (mtu <= card->info.max_mtu));
2274         case QETH_CARD_TYPE_OSN:
2275         case QETH_CARD_TYPE_UNKNOWN:
2276         default:
2277                 return 1;
2278         }
2279 }
2280 
2281 static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2282                 unsigned long data)
2283 {
2284 
2285         __u16 mtu, framesize;
2286         __u16 len;
2287         __u8 link_type;
2288         struct qeth_cmd_buffer *iob;
2289 
2290         QETH_DBF_TEXT(SETUP, 2, "ulpenacb");
2291 
2292         iob = (struct qeth_cmd_buffer *) data;
2293         memcpy(&card->token.ulp_filter_r,
2294                QETH_ULP_ENABLE_RESP_FILTER_TOKEN(iob->data),
2295                QETH_MPC_TOKEN_LENGTH);
2296         if (card->info.type == QETH_CARD_TYPE_IQD) {
2297                 memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2);
2298                 mtu = qeth_get_mtu_outof_framesize(framesize);
2299                 if (!mtu) {
2300                         iob->rc = -EINVAL;
2301                         QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
2302                         return 0;
2303                 }
2304                 if (card->info.initial_mtu && (card->info.initial_mtu != mtu)) {
2305                         /* frame size has changed */
2306                         if (card->dev &&
2307                             ((card->dev->mtu == card->info.initial_mtu) ||
2308                              (card->dev->mtu > mtu)))
2309                                 card->dev->mtu = mtu;
2310                         qeth_free_qdio_buffers(card);
2311                 }
2312                 card->info.initial_mtu = mtu;
2313                 card->info.max_mtu = mtu;
2314                 card->qdio.in_buf_size = mtu + 2 * PAGE_SIZE;
2315         } else {
2316                 card->info.max_mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(
2317                         iob->data);
2318                 card->info.initial_mtu = min(card->info.max_mtu,
2319                                         qeth_get_initial_mtu_for_card(card));
2320                 card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
2321         }
2322 
2323         memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2);
2324         if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) {
2325                 memcpy(&link_type,
2326                        QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1);
2327                 card->info.link_type = link_type;
2328         } else
2329                 card->info.link_type = 0;
2330         QETH_DBF_TEXT_(SETUP, 2, "link%d", card->info.link_type);
2331         QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
2332         return 0;
2333 }
2334 
2335 static int qeth_ulp_enable(struct qeth_card *card)
2336 {
2337         int rc;
2338         char prot_type;
2339         struct qeth_cmd_buffer *iob;
2340 
2341         /*FIXME: trace view callbacks*/
2342         QETH_DBF_TEXT(SETUP, 2, "ulpenabl");
2343 
2344         iob = qeth_wait_for_buffer(&card->write);
2345         memcpy(iob->data, ULP_ENABLE, ULP_ENABLE_SIZE);
2346 
2347         *(QETH_ULP_ENABLE_LINKNUM(iob->data)) =
2348                 (__u8) card->info.portno;
2349         if (card->options.layer2)
2350                 if (card->info.type == QETH_CARD_TYPE_OSN)
2351                         prot_type = QETH_PROT_OSN2;
2352                 else
2353                         prot_type = QETH_PROT_LAYER2;
2354         else
2355                 prot_type = QETH_PROT_TCPIP;
2356 
2357         memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1);
2358         memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data),
2359                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2360         memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data),
2361                &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH);
2362         memcpy(QETH_ULP_ENABLE_PORTNAME_AND_LL(iob->data),
2363                card->info.portname, 9);
2364         rc = qeth_send_control_data(card, ULP_ENABLE_SIZE, iob,
2365                                     qeth_ulp_enable_cb, NULL);
2366         return rc;
2367 
2368 }
2369 
2370 static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2371                 unsigned long data)
2372 {
2373         struct qeth_cmd_buffer *iob;
2374 
2375         QETH_DBF_TEXT(SETUP, 2, "ulpstpcb");
2376 
2377         iob = (struct qeth_cmd_buffer *) data;
2378         memcpy(&card->token.ulp_connection_r,
2379                QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2380                QETH_MPC_TOKEN_LENGTH);
2381         if (!strncmp("00S", QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2382                      3)) {
2383                 QETH_DBF_TEXT(SETUP, 2, "olmlimit");
2384                 dev_err(&card->gdev->dev, "A connection could not be "
2385                         "established because of an OLM limit\n");
2386                 iob->rc = -EMLINK;
2387         }
2388         QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
2389         return 0;
2390 }
2391 
2392 static int qeth_ulp_setup(struct qeth_card *card)
2393 {
2394         int rc;
2395         __u16 temp;
2396         struct qeth_cmd_buffer *iob;
2397         struct ccw_dev_id dev_id;
2398 
2399         QETH_DBF_TEXT(SETUP, 2, "ulpsetup");
2400 
2401         iob = qeth_wait_for_buffer(&card->write);
2402         memcpy(iob->data, ULP_SETUP, ULP_SETUP_SIZE);
2403 
2404         memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data),
2405                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2406         memcpy(QETH_ULP_SETUP_CONNECTION_TOKEN(iob->data),
2407                &card->token.ulp_connection_w, QETH_MPC_TOKEN_LENGTH);
2408         memcpy(QETH_ULP_SETUP_FILTER_TOKEN(iob->data),
2409                &card->token.ulp_filter_r, QETH_MPC_TOKEN_LENGTH);
2410 
2411         ccw_device_get_id(CARD_DDEV(card), &dev_id);
2412         memcpy(QETH_ULP_SETUP_CUA(iob->data), &dev_id.devno, 2);
2413         temp = (card->info.cula << 8) + card->info.unit_addr2;
2414         memcpy(QETH_ULP_SETUP_REAL_DEVADDR(iob->data), &temp, 2);
2415         rc = qeth_send_control_data(card, ULP_SETUP_SIZE, iob,
2416                                     qeth_ulp_setup_cb, NULL);
2417         return rc;
2418 }
2419 
2420 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *q, int bidx)
2421 {
2422         int rc;
2423         struct qeth_qdio_out_buffer *newbuf;
2424 
2425         rc = 0;
2426         newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, GFP_ATOMIC);
2427         if (!newbuf) {
2428                 rc = -ENOMEM;
2429                 goto out;
2430         }
2431         newbuf->buffer = q->qdio_bufs[bidx];
2432         skb_queue_head_init(&newbuf->skb_list);
2433         lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key);
2434         newbuf->q = q;
2435         newbuf->aob = NULL;
2436         newbuf->next_pending = q->bufs[bidx];
2437         atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY);
2438         q->bufs[bidx] = newbuf;
2439         if (q->bufstates) {
2440                 q->bufstates[bidx].user = newbuf;
2441                 QETH_CARD_TEXT_(q->card, 2, "nbs%d", bidx);
2442                 QETH_CARD_TEXT_(q->card, 2, "%lx", (long) newbuf);
2443                 QETH_CARD_TEXT_(q->card, 2, "%lx",
2444                                 (long) newbuf->next_pending);
2445         }
2446 out:
2447         return rc;
2448 }
2449 
2450 static void qeth_free_qdio_out_buf(struct qeth_qdio_out_q *q)
2451 {
2452         if (!q)
2453                 return;
2454 
2455         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2456         kfree(q);
2457 }
2458 
2459 static struct qeth_qdio_out_q *qeth_alloc_qdio_out_buf(void)
2460 {
2461         struct qeth_qdio_out_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
2462 
2463         if (!q)
2464                 return NULL;
2465 
2466         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
2467                 kfree(q);
2468                 return NULL;
2469         }
2470         return q;
2471 }
2472 
2473 static int qeth_alloc_qdio_buffers(struct qeth_card *card)
2474 {
2475         int i, j;
2476 
2477         QETH_DBF_TEXT(SETUP, 2, "allcqdbf");
2478 
2479         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED,
2480                 QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED)
2481                 return 0;
2482 
2483         QETH_DBF_TEXT(SETUP, 2, "inq");
2484         card->qdio.in_q = qeth_alloc_qdio_queue();
2485         if (!card->qdio.in_q)
2486                 goto out_nomem;
2487 
2488         /* inbound buffer pool */
2489         if (qeth_alloc_buffer_pool(card))
2490                 goto out_freeinq;
2491 
2492         /* outbound */
2493         card->qdio.out_qs =
2494                 kzalloc(card->qdio.no_out_queues *
2495                         sizeof(struct qeth_qdio_out_q *), GFP_KERNEL);
2496         if (!card->qdio.out_qs)
2497                 goto out_freepool;
2498         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2499                 card->qdio.out_qs[i] = qeth_alloc_qdio_out_buf();
2500                 if (!card->qdio.out_qs[i])
2501                         goto out_freeoutq;
2502                 QETH_DBF_TEXT_(SETUP, 2, "outq %i", i);
2503                 QETH_DBF_HEX(SETUP, 2, &card->qdio.out_qs[i], sizeof(void *));
2504                 card->qdio.out_qs[i]->queue_no = i;
2505                 /* give outbound qeth_qdio_buffers their qdio_buffers */
2506                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2507                         WARN_ON(card->qdio.out_qs[i]->bufs[j] != NULL);
2508                         if (qeth_init_qdio_out_buf(card->qdio.out_qs[i], j))
2509                                 goto out_freeoutqbufs;
2510                 }
2511         }
2512 
2513         /* completion */
2514         if (qeth_alloc_cq(card))
2515                 goto out_freeoutq;
2516 
2517         return 0;
2518 
2519 out_freeoutqbufs:
2520         while (j > 0) {
2521                 --j;
2522                 kmem_cache_free(qeth_qdio_outbuf_cache,
2523                                 card->qdio.out_qs[i]->bufs[j]);
2524                 card->qdio.out_qs[i]->bufs[j] = NULL;
2525         }
2526 out_freeoutq:
2527         while (i > 0) {
2528                 qeth_free_qdio_out_buf(card->qdio.out_qs[--i]);
2529                 qeth_clear_outq_buffers(card->qdio.out_qs[i], 1);
2530         }
2531         kfree(card->qdio.out_qs);
2532         card->qdio.out_qs = NULL;
2533 out_freepool:
2534         qeth_free_buffer_pool(card);
2535 out_freeinq:
2536         qeth_free_qdio_queue(card->qdio.in_q);
2537         card->qdio.in_q = NULL;
2538 out_nomem:
2539         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
2540         return -ENOMEM;
2541 }
2542 
2543 static void qeth_free_qdio_buffers(struct qeth_card *card)
2544 {
2545         int i, j;
2546 
2547         if (atomic_xchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED) ==
2548                 QETH_QDIO_UNINITIALIZED)
2549                 return;
2550 
2551         qeth_free_cq(card);
2552         cancel_delayed_work_sync(&card->buffer_reclaim_work);
2553         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2554                 if (card->qdio.in_q->bufs[j].rx_skb)
2555                         dev_kfree_skb_any(card->qdio.in_q->bufs[j].rx_skb);
2556         }
2557         qeth_free_qdio_queue(card->qdio.in_q);
2558         card->qdio.in_q = NULL;
2559         /* inbound buffer pool */
2560         qeth_free_buffer_pool(card);
2561         /* free outbound qdio_qs */
2562         if (card->qdio.out_qs) {
2563                 for (i = 0; i < card->qdio.no_out_queues; ++i) {
2564                         qeth_clear_outq_buffers(card->qdio.out_qs[i], 1);
2565                         qeth_free_qdio_out_buf(card->qdio.out_qs[i]);
2566                 }
2567                 kfree(card->qdio.out_qs);
2568                 card->qdio.out_qs = NULL;
2569         }
2570 }
2571 
2572 static void qeth_create_qib_param_field(struct qeth_card *card,
2573                 char *param_field)
2574 {
2575 
2576         param_field[0] = _ascebc['P'];
2577         param_field[1] = _ascebc['C'];
2578         param_field[2] = _ascebc['I'];
2579         param_field[3] = _ascebc['T'];
2580         *((unsigned int *) (&param_field[4])) = QETH_PCI_THRESHOLD_A(card);
2581         *((unsigned int *) (&param_field[8])) = QETH_PCI_THRESHOLD_B(card);
2582         *((unsigned int *) (&param_field[12])) = QETH_PCI_TIMER_VALUE(card);
2583 }
2584 
2585 static void qeth_create_qib_param_field_blkt(struct qeth_card *card,
2586                 char *param_field)
2587 {
2588         param_field[16] = _ascebc['B'];
2589         param_field[17] = _ascebc['L'];
2590         param_field[18] = _ascebc['K'];
2591         param_field[19] = _ascebc['T'];
2592         *((unsigned int *) (&param_field[20])) = card->info.blkt.time_total;
2593         *((unsigned int *) (&param_field[24])) = card->info.blkt.inter_packet;
2594         *((unsigned int *) (&param_field[28])) =
2595                 card->info.blkt.inter_packet_jumbo;
2596 }
2597 
2598 static int qeth_qdio_activate(struct qeth_card *card)
2599 {
2600         QETH_DBF_TEXT(SETUP, 3, "qdioact");
2601         return qdio_activate(CARD_DDEV(card));
2602 }
2603 
2604 static int qeth_dm_act(struct qeth_card *card)
2605 {
2606         int rc;
2607         struct qeth_cmd_buffer *iob;
2608 
2609         QETH_DBF_TEXT(SETUP, 2, "dmact");
2610 
2611         iob = qeth_wait_for_buffer(&card->write);
2612         memcpy(iob->data, DM_ACT, DM_ACT_SIZE);
2613 
2614         memcpy(QETH_DM_ACT_DEST_ADDR(iob->data),
2615                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2616         memcpy(QETH_DM_ACT_CONNECTION_TOKEN(iob->data),
2617                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2618         rc = qeth_send_control_data(card, DM_ACT_SIZE, iob, NULL, NULL);
2619         return rc;
2620 }
2621 
2622 static int qeth_mpc_initialize(struct qeth_card *card)
2623 {
2624         int rc;
2625 
2626         QETH_DBF_TEXT(SETUP, 2, "mpcinit");
2627 
2628         rc = qeth_issue_next_read(card);
2629         if (rc) {
2630                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
2631                 return rc;
2632         }
2633         rc = qeth_cm_enable(card);
2634         if (rc) {
2635                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
2636                 goto out_qdio;
2637         }
2638         rc = qeth_cm_setup(card);
2639         if (rc) {
2640                 QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
2641                 goto out_qdio;
2642         }
2643         rc = qeth_ulp_enable(card);
2644         if (rc) {
2645                 QETH_DBF_TEXT_(SETUP, 2, "4err%d", rc);
2646                 goto out_qdio;
2647         }
2648         rc = qeth_ulp_setup(card);
2649         if (rc) {
2650                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
2651                 goto out_qdio;
2652         }
2653         rc = qeth_alloc_qdio_buffers(card);
2654         if (rc) {
2655                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
2656                 goto out_qdio;
2657         }
2658         rc = qeth_qdio_establish(card);
2659         if (rc) {
2660                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
2661                 qeth_free_qdio_buffers(card);
2662                 goto out_qdio;
2663         }
2664         rc = qeth_qdio_activate(card);
2665         if (rc) {
2666                 QETH_DBF_TEXT_(SETUP, 2, "7err%d", rc);
2667                 goto out_qdio;
2668         }
2669         rc = qeth_dm_act(card);
2670         if (rc) {
2671                 QETH_DBF_TEXT_(SETUP, 2, "8err%d", rc);
2672                 goto out_qdio;
2673         }
2674 
2675         return 0;
2676 out_qdio:
2677         qeth_qdio_clear_card(card, card->info.type != QETH_CARD_TYPE_IQD);
2678         qdio_free(CARD_DDEV(card));
2679         return rc;
2680 }
2681 
2682 static void qeth_print_status_with_portname(struct qeth_card *card)
2683 {
2684         char dbf_text[15];
2685         int i;
2686 
2687         sprintf(dbf_text, "%s", card->info.portname + 1);
2688         for (i = 0; i < 8; i++)
2689                 dbf_text[i] =
2690                         (char) _ebcasc[(__u8) dbf_text[i]];
2691         dbf_text[8] = 0;
2692         dev_info(&card->gdev->dev, "Device is a%s card%s%s%s\n"
2693                "with link type %s (portname: %s)\n",
2694                qeth_get_cardname(card),
2695                (card->info.mcl_level[0]) ? " (level: " : "",
2696                (card->info.mcl_level[0]) ? card->info.mcl_level : "",
2697                (card->info.mcl_level[0]) ? ")" : "",
2698                qeth_get_cardname_short(card),
2699                dbf_text);
2700 
2701 }
2702 
2703 static void qeth_print_status_no_portname(struct qeth_card *card)
2704 {
2705         if (card->info.portname[0])
2706                 dev_info(&card->gdev->dev, "Device is a%s "
2707                        "card%s%s%s\nwith link type %s "
2708                        "(no portname needed by interface).\n",
2709                        qeth_get_cardname(card),
2710                        (card->info.mcl_level[0]) ? " (level: " : "",
2711                        (card->info.mcl_level[0]) ? card->info.mcl_level : "",
2712                        (card->info.mcl_level[0]) ? ")" : "",
2713                        qeth_get_cardname_short(card));
2714         else
2715                 dev_info(&card->gdev->dev, "Device is a%s "
2716                        "card%s%s%s\nwith link type %s.\n",
2717                        qeth_get_cardname(card),
2718                        (card->info.mcl_level[0]) ? " (level: " : "",
2719                        (card->info.mcl_level[0]) ? card->info.mcl_level : "",
2720                        (card->info.mcl_level[0]) ? ")" : "",
2721                        qeth_get_cardname_short(card));
2722 }
2723 
2724 void qeth_print_status_message(struct qeth_card *card)
2725 {
2726         switch (card->info.type) {
2727         case QETH_CARD_TYPE_OSD:
2728         case QETH_CARD_TYPE_OSM:
2729         case QETH_CARD_TYPE_OSX:
2730                 /* VM will use a non-zero first character
2731                  * to indicate a HiperSockets like reporting
2732                  * of the level OSA sets the first character to zero
2733                  * */
2734                 if (!card->info.mcl_level[0]) {
2735                         sprintf(card->info.mcl_level, "%02x%02x",
2736                                 card->info.mcl_level[2],
2737                                 card->info.mcl_level[3]);
2738 
2739                         card->info.mcl_level[QETH_MCL_LENGTH] = 0;
2740                         break;
2741                 }
2742                 /* fallthrough */
2743         case QETH_CARD_TYPE_IQD:
2744                 if ((card->info.guestlan) ||
2745                     (card->info.mcl_level[0] & 0x80)) {
2746                         card->info.mcl_level[0] = (char) _ebcasc[(__u8)
2747                                 card->info.mcl_level[0]];
2748                         card->info.mcl_level[1] = (char) _ebcasc[(__u8)
2749                                 card->info.mcl_level[1]];
2750                         card->info.mcl_level[2] = (char) _ebcasc[(__u8)
2751                                 card->info.mcl_level[2]];
2752                         card->info.mcl_level[3] = (char) _ebcasc[(__u8)
2753                                 card->info.mcl_level[3]];
2754                         card->info.mcl_level[QETH_MCL_LENGTH] = 0;
2755                 }
2756                 break;
2757         default:
2758                 memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1);
2759         }
2760         if (card->info.portname_required)
2761                 qeth_print_status_with_portname(card);
2762         else
2763                 qeth_print_status_no_portname(card);
2764 }
2765 EXPORT_SYMBOL_GPL(qeth_print_status_message);
2766 
2767 static void qeth_initialize_working_pool_list(struct qeth_card *card)
2768 {
2769         struct qeth_buffer_pool_entry *entry;
2770 
2771         QETH_CARD_TEXT(card, 5, "inwrklst");
2772 
2773         list_for_each_entry(entry,
2774                             &card->qdio.init_pool.entry_list, init_list) {
2775                 qeth_put_buffer_pool_entry(card, entry);
2776         }
2777 }
2778 
2779 static inline struct qeth_buffer_pool_entry *qeth_find_free_buffer_pool_entry(
2780                 struct qeth_card *card)
2781 {
2782         struct list_head *plh;
2783         struct qeth_buffer_pool_entry *entry;
2784         int i, free;
2785         struct page *page;
2786 
2787         if (list_empty(&card->qdio.in_buf_pool.entry_list))
2788                 return NULL;
2789 
2790         list_for_each(plh, &card->qdio.in_buf_pool.entry_list) {
2791                 entry = list_entry(plh, struct qeth_buffer_pool_entry, list);
2792                 free = 1;
2793                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2794                         if (page_count(virt_to_page(entry->elements[i])) > 1) {
2795                                 free = 0;
2796                                 break;
2797                         }
2798                 }
2799                 if (free) {
2800                         list_del_init(&entry->list);
2801                         return entry;
2802                 }
2803         }
2804 
2805         /* no free buffer in pool so take first one and swap pages */
2806         entry = list_entry(card->qdio.in_buf_pool.entry_list.next,
2807                         struct qeth_buffer_pool_entry, list);
2808         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2809                 if (page_count(virt_to_page(entry->elements[i])) > 1) {
2810                         page = alloc_page(GFP_ATOMIC);
2811                         if (!page) {
2812                                 return NULL;
2813                         } else {
2814                                 free_page((unsigned long)entry->elements[i]);
2815                                 entry->elements[i] = page_address(page);
2816                                 if (card->options.performance_stats)
2817                                         card->perf_stats.sg_alloc_page_rx++;
2818                         }
2819                 }
2820         }
2821         list_del_init(&entry->list);
2822         return entry;
2823 }
2824 
2825 static int qeth_init_input_buffer(struct qeth_card *card,
2826                 struct qeth_qdio_buffer *buf)
2827 {
2828         struct qeth_buffer_pool_entry *pool_entry;
2829         int i;
2830 
2831         if ((card->options.cq == QETH_CQ_ENABLED) && (!buf->rx_skb)) {
2832                 buf->rx_skb = dev_alloc_skb(QETH_RX_PULL_LEN + ETH_HLEN);
2833                 if (!buf->rx_skb)
2834                         return 1;
2835         }
2836 
2837         pool_entry = qeth_find_free_buffer_pool_entry(card);
2838         if (!pool_entry)
2839                 return 1;
2840 
2841         /*
2842          * since the buffer is accessed only from the input_tasklet
2843          * there shouldn't be a need to synchronize; also, since we use
2844          * the QETH_IN_BUF_REQUEUE_THRESHOLD we should never run  out off
2845          * buffers
2846          */
2847 
2848         buf->pool_entry = pool_entry;
2849         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2850                 buf->buffer->element[i].length = PAGE_SIZE;
2851                 buf->buffer->element[i].addr =  pool_entry->elements[i];
2852                 if (i == QETH_MAX_BUFFER_ELEMENTS(card) - 1)
2853                         buf->buffer->element[i].eflags = SBAL_EFLAGS_LAST_ENTRY;
2854                 else
2855                         buf->buffer->element[i].eflags = 0;
2856                 buf->buffer->element[i].sflags = 0;
2857         }
2858         return 0;
2859 }
2860 
2861 int qeth_init_qdio_queues(struct qeth_card *card)
2862 {
2863         int i, j;
2864         int rc;
2865 
2866         QETH_DBF_TEXT(SETUP, 2, "initqdqs");
2867 
2868         /* inbound queue */
2869         qdio_reset_buffers(card->qdio.in_q->qdio_bufs,
2870                            QDIO_MAX_BUFFERS_PER_Q);
2871         qeth_initialize_working_pool_list(card);
2872         /*give only as many buffers to hardware as we have buffer pool entries*/
2873         for (i = 0; i < card->qdio.in_buf_pool.buf_count - 1; ++i)
2874                 qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]);
2875         card->qdio.in_q->next_buf_to_init =
2876                 card->qdio.in_buf_pool.buf_count - 1;
2877         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0, 0,
2878                      card->qdio.in_buf_pool.buf_count - 1);
2879         if (rc) {
2880                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
2881                 return rc;
2882         }
2883 
2884         /* completion */
2885         rc = qeth_cq_init(card);
2886         if (rc) {
2887                 return rc;
2888         }
2889 
2890         /* outbound queue */
2891         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2892                 qdio_reset_buffers(card->qdio.out_qs[i]->qdio_bufs,
2893                                    QDIO_MAX_BUFFERS_PER_Q);
2894                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2895                         qeth_clear_output_buffer(card->qdio.out_qs[i],
2896                                         card->qdio.out_qs[i]->bufs[j],
2897                                         QETH_QDIO_BUF_EMPTY);
2898                 }
2899                 card->qdio.out_qs[i]->card = card;
2900                 card->qdio.out_qs[i]->next_buf_to_fill = 0;
2901                 card->qdio.out_qs[i]->do_pack = 0;
2902                 atomic_set(&card->qdio.out_qs[i]->used_buffers, 0);
2903                 atomic_set(&card->qdio.out_qs[i]->set_pci_flags_count, 0);
2904                 atomic_set(&card->qdio.out_qs[i]->state,
2905                            QETH_OUT_Q_UNLOCKED);
2906         }
2907         return 0;
2908 }
2909 EXPORT_SYMBOL_GPL(qeth_init_qdio_queues);
2910 
2911 static inline __u8 qeth_get_ipa_adp_type(enum qeth_link_types link_type)
2912 {
2913         switch (link_type) {
2914         case QETH_LINK_TYPE_HSTR:
2915                 return 2;
2916         default:
2917                 return 1;
2918         }
2919 }
2920 
2921 static void qeth_fill_ipacmd_header(struct qeth_card *card,
2922                 struct qeth_ipa_cmd *cmd, __u8 command,
2923                 enum qeth_prot_versions prot)
2924 {
2925         memset(cmd, 0, sizeof(struct qeth_ipa_cmd));
2926         cmd->hdr.command = command;
2927         cmd->hdr.initiator = IPA_CMD_INITIATOR_HOST;
2928         cmd->hdr.seqno = card->seqno.ipa;
2929         cmd->hdr.adapter_type = qeth_get_ipa_adp_type(card->info.link_type);
2930         cmd->hdr.rel_adapter_no = (__u8) card->info.portno;
2931         if (card->options.layer2)
2932                 cmd->hdr.prim_version_no = 2;
2933         else
2934                 cmd->hdr.prim_version_no = 1;
2935         cmd->hdr.param_count = 1;
2936         cmd->hdr.prot_version = prot;
2937         cmd->hdr.ipa_supported = 0;
2938         cmd->hdr.ipa_enabled = 0;
2939 }
2940 
2941 struct qeth_cmd_buffer *qeth_get_ipacmd_buffer(struct qeth_card *card,
2942                 enum qeth_ipa_cmds ipacmd, enum qeth_prot_versions prot)
2943 {
2944         struct qeth_cmd_buffer *iob;
2945         struct qeth_ipa_cmd *cmd;
2946 
2947         iob = qeth_get_buffer(&card->write);
2948         if (iob) {
2949                 cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
2950                 qeth_fill_ipacmd_header(card, cmd, ipacmd, prot);
2951         } else {
2952                 dev_warn(&card->gdev->dev,
2953                          "The qeth driver ran out of channel command buffers\n");
2954                 QETH_DBF_MESSAGE(1, "%s The qeth driver ran out of channel command buffers",
2955                                  dev_name(&card->gdev->dev));
2956         }
2957 
2958         return iob;
2959 }
2960 EXPORT_SYMBOL_GPL(qeth_get_ipacmd_buffer);
2961 
2962 void qeth_prepare_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
2963                 char prot_type)
2964 {
2965         memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
2966         memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1);
2967         memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
2968                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2969 }
2970 EXPORT_SYMBOL_GPL(qeth_prepare_ipa_cmd);
2971 
2972 /**
2973  * qeth_send_ipa_cmd() - send an IPA command
2974  *
2975  * See qeth_send_control_data() for explanation of the arguments.
2976  */
2977 
2978 int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
2979                 int (*reply_cb)(struct qeth_card *, struct qeth_reply*,
2980                         unsigned long),
2981                 void *reply_param)
2982 {
2983         int rc;
2984         char prot_type;
2985 
2986         QETH_CARD_TEXT(card, 4, "sendipa");
2987 
2988         if (card->options.layer2)
2989                 if (card->info.type == QETH_CARD_TYPE_OSN)
2990                         prot_type = QETH_PROT_OSN2;
2991                 else
2992                         prot_type = QETH_PROT_LAYER2;
2993         else
2994                 prot_type = QETH_PROT_TCPIP;
2995         qeth_prepare_ipa_cmd(card, iob, prot_type);
2996         rc = qeth_send_control_data(card, IPA_CMD_LENGTH,
2997                                                 iob, reply_cb, reply_param);
2998         if (rc == -ETIME) {
2999                 qeth_clear_ipacmd_list(card);
3000                 qeth_schedule_recovery(card);
3001         }
3002         return rc;
3003 }
3004 EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd);
3005 
3006 int qeth_send_startlan(struct qeth_card *card)
3007 {
3008         int rc;
3009         struct qeth_cmd_buffer *iob;
3010 
3011         QETH_DBF_TEXT(SETUP, 2, "strtlan");
3012 
3013         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_STARTLAN, 0);
3014         if (!iob)
3015                 return -ENOMEM;
3016         rc = qeth_send_ipa_cmd(card, iob, NULL, NULL);
3017         return rc;
3018 }
3019 EXPORT_SYMBOL_GPL(qeth_send_startlan);
3020 
3021 static int qeth_default_setadapterparms_cb(struct qeth_card *card,
3022                 struct qeth_reply *reply, unsigned long data)
3023 {
3024         struct qeth_ipa_cmd *cmd;
3025 
3026         QETH_CARD_TEXT(card, 4, "defadpcb");
3027 
3028         cmd = (struct qeth_ipa_cmd *) data;
3029         if (cmd->hdr.return_code == 0)
3030                 cmd->hdr.return_code =
3031                         cmd->data.setadapterparms.hdr.return_code;
3032         return 0;
3033 }
3034 
3035 static int qeth_query_setadapterparms_cb(struct qeth_card *card,
3036                 struct qeth_reply *reply, unsigned long data)
3037 {
3038         struct qeth_ipa_cmd *cmd;
3039 
3040         QETH_CARD_TEXT(card, 3, "quyadpcb");
3041 
3042         cmd = (struct qeth_ipa_cmd *) data;
3043         if (cmd->data.setadapterparms.data.query_cmds_supp.lan_type & 0x7f) {
3044                 card->info.link_type =
3045                       cmd->data.setadapterparms.data.query_cmds_supp.lan_type;
3046                 QETH_DBF_TEXT_(SETUP, 2, "lnk %d", card->info.link_type);
3047         }
3048         card->options.adp.supported_funcs =
3049                 cmd->data.setadapterparms.data.query_cmds_supp.supported_cmds;
3050         return qeth_default_setadapterparms_cb(card, reply, (unsigned long)cmd);
3051 }
3052 
3053 static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card,
3054                 __u32 command, __u32 cmdlen)
3055 {
3056         struct qeth_cmd_buffer *iob;
3057         struct qeth_ipa_cmd *cmd;
3058 
3059         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SETADAPTERPARMS,
3060                                      QETH_PROT_IPV4);
3061         if (iob) {
3062                 cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
3063                 cmd->data.setadapterparms.hdr.cmdlength = cmdlen;
3064                 cmd->data.setadapterparms.hdr.command_code = command;
3065                 cmd->data.setadapterparms.hdr.used_total = 1;
3066                 cmd->data.setadapterparms.hdr.seq_no = 1;
3067         }
3068 
3069         return iob;
3070 }
3071 
3072 int qeth_query_setadapterparms(struct qeth_card *card)
3073 {
3074         int rc;
3075         struct qeth_cmd_buffer *iob;
3076 
3077         QETH_CARD_TEXT(card, 3, "queryadp");
3078         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_COMMANDS_SUPPORTED,
3079                                    sizeof(struct qeth_ipacmd_setadpparms));
3080         if (!iob)
3081                 return -ENOMEM;
3082         rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL);
3083         return rc;
3084 }
3085 EXPORT_SYMBOL_GPL(qeth_query_setadapterparms);
3086 
3087 static int qeth_query_ipassists_cb(struct qeth_card *card,
3088                 struct qeth_reply *reply, unsigned long data)
3089 {
3090         struct qeth_ipa_cmd *cmd;
3091 
3092         QETH_DBF_TEXT(SETUP, 2, "qipasscb");
3093 
3094         cmd = (struct qeth_ipa_cmd *) data;
3095 
3096         switch (cmd->hdr.return_code) {
3097         case IPA_RC_NOTSUPP:
3098         case IPA_RC_L2_UNSUPPORTED_CMD:
3099                 QETH_DBF_TEXT(SETUP, 2, "ipaunsup");
3100                 card->options.ipa4.supported_funcs |= IPA_SETADAPTERPARMS;
3101                 card->options.ipa6.supported_funcs |= IPA_SETADAPTERPARMS;
3102                 return -0;
3103         default:
3104                 if (cmd->hdr.return_code) {
3105                         QETH_DBF_MESSAGE(1, "%s IPA_CMD_QIPASSIST: Unhandled "
3106                                                 "rc=%d\n",
3107                                                 dev_name(&card->gdev->dev),
3108                                                 cmd->hdr.return_code);
3109                         return 0;
3110                 }
3111         }
3112 
3113         if (cmd->hdr.prot_version == QETH_PROT_IPV4) {
3114                 card->options.ipa4.supported_funcs = cmd->hdr.ipa_supported;
3115                 card->options.ipa4.enabled_funcs = cmd->hdr.ipa_enabled;
3116         } else if (cmd->hdr.prot_version == QETH_PROT_IPV6) {
3117                 card->options.ipa6.supported_funcs = cmd->hdr.ipa_supported;
3118                 card->options.ipa6.enabled_funcs = cmd->hdr.ipa_enabled;
3119         } else
3120                 QETH_DBF_MESSAGE(1, "%s IPA_CMD_QIPASSIST: Flawed LIC detected"
3121                                         "\n", dev_name(&card->gdev->dev));
3122         return 0;
3123 }
3124 
3125 int qeth_query_ipassists(struct qeth_card *card, enum qeth_prot_versions prot)
3126 {
3127         int rc;
3128         struct qeth_cmd_buffer *iob;
3129 
3130         QETH_DBF_TEXT_(SETUP, 2, "qipassi%i", prot);
3131         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_QIPASSIST, prot);
3132         if (!iob)
3133                 return -ENOMEM;
3134         rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL);
3135         return rc;
3136 }
3137 EXPORT_SYMBOL_GPL(qeth_query_ipassists);
3138 
3139 static int qeth_query_switch_attributes_cb(struct qeth_card *card,
3140                                 struct qeth_reply *reply, unsigned long data)
3141 {
3142         struct qeth_ipa_cmd *cmd;
3143         struct qeth_switch_info *sw_info;
3144         struct qeth_query_switch_attributes *attrs;
3145 
3146         QETH_CARD_TEXT(card, 2, "qswiatcb");
3147         cmd = (struct qeth_ipa_cmd *) data;
3148         sw_info = (struct qeth_switch_info *)reply->param;
3149         if (cmd->data.setadapterparms.hdr.return_code == 0) {
3150                 attrs = &cmd->data.setadapterparms.data.query_switch_attributes;
3151                 sw_info->capabilities = attrs->capabilities;
3152                 sw_info->settings = attrs->settings;
3153                 QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities,
3154                                                         sw_info->settings);
3155         }
3156         qeth_default_setadapterparms_cb(card, reply, (unsigned long) cmd);
3157 
3158         return 0;
3159 }
3160 
3161 int qeth_query_switch_attributes(struct qeth_card *card,
3162                                  struct qeth_switch_info *sw_info)
3163 {
3164         struct qeth_cmd_buffer *iob;
3165 
3166         QETH_CARD_TEXT(card, 2, "qswiattr");
3167         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES))
3168                 return -EOPNOTSUPP;
3169         if (!netif_carrier_ok(card->dev))
3170                 return -ENOMEDIUM;
3171         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES,
3172                                 sizeof(struct qeth_ipacmd_setadpparms_hdr));
3173         if (!iob)
3174                 return -ENOMEM;
3175         return qeth_send_ipa_cmd(card, iob,
3176                                 qeth_query_switch_attributes_cb, sw_info);
3177 }
3178 EXPORT_SYMBOL_GPL(qeth_query_switch_attributes);
3179 
3180 static int qeth_query_setdiagass_cb(struct qeth_card *card,
3181                 struct qeth_reply *reply, unsigned long data)
3182 {
3183         struct qeth_ipa_cmd *cmd;
3184         __u16 rc;
3185 
3186         cmd = (struct qeth_ipa_cmd *)data;
3187         rc = cmd->hdr.return_code;
3188         if (rc)
3189                 QETH_CARD_TEXT_(card, 2, "diagq:%x", rc);
3190         else
3191                 card->info.diagass_support = cmd->data.diagass.ext;
3192         return 0;
3193 }
3194 
3195 static int qeth_query_setdiagass(struct qeth_card *card)
3196 {
3197         struct qeth_cmd_buffer *iob;
3198         struct qeth_ipa_cmd    *cmd;
3199 
3200         QETH_DBF_TEXT(SETUP, 2, "qdiagass");
3201         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SET_DIAG_ASS, 0);
3202         if (!iob)
3203                 return -ENOMEM;
3204         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
3205         cmd->data.diagass.subcmd_len = 16;
3206         cmd->data.diagass.subcmd = QETH_DIAGS_CMD_QUERY;
3207         return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL);
3208 }
3209 
3210 static void qeth_get_trap_id(struct qeth_card *card, struct qeth_trap_id *tid)
3211 {
3212         unsigned long info = get_zeroed_page(GFP_KERNEL);
3213         struct sysinfo_2_2_2 *info222 = (struct sysinfo_2_2_2 *)info;
3214         struct sysinfo_3_2_2 *info322 = (struct sysinfo_3_2_2 *)info;
3215         struct ccw_dev_id ccwid;
3216         int level;
3217 
3218         tid->chpid = card->info.chpid;
3219         ccw_device_get_id(CARD_RDEV(card), &ccwid);
3220         tid->ssid = ccwid.ssid;
3221         tid->devno = ccwid.devno;
3222         if (!info)
3223                 return;
3224         level = stsi(NULL, 0, 0, 0);
3225         if ((level >= 2) && (stsi(info222, 2, 2, 2) == 0))
3226                 tid->lparnr = info222->lpar_number;
3227         if ((level >= 3) && (stsi(info322, 3, 2, 2) == 0)) {
3228                 EBCASC(info322->vm[0].name, sizeof(info322->vm[0].name));
3229                 memcpy(tid->vmname, info322->vm[0].name, sizeof(tid->vmname));
3230         }
3231         free_page(info);
3232         return;
3233 }
3234 
3235 static int qeth_hw_trap_cb(struct qeth_card *card,
3236                 struct qeth_reply *reply, unsigned long data)
3237 {
3238         struct qeth_ipa_cmd *cmd;
3239         __u16 rc;
3240 
3241         cmd = (struct qeth_ipa_cmd *)data;
3242         rc = cmd->hdr.return_code;
3243         if (rc)
3244                 QETH_CARD_TEXT_(card, 2, "trapc:%x", rc);
3245         return 0;
3246 }
3247 
3248 int qeth_hw_trap(struct qeth_card *card, enum qeth_diags_trap_action action)
3249 {
3250         struct qeth_cmd_buffer *iob;
3251         struct qeth_ipa_cmd *cmd;
3252 
3253         QETH_DBF_TEXT(SETUP, 2, "diagtrap");
3254         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SET_DIAG_ASS, 0);
3255         if (!iob)
3256                 return -ENOMEM;
3257         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
3258         cmd->data.diagass.subcmd_len = 80;
3259         cmd->data.diagass.subcmd = QETH_DIAGS_CMD_TRAP;
3260         cmd->data.diagass.type = 1;
3261         cmd->data.diagass.action = action;
3262         switch (action) {
3263         case QETH_DIAGS_TRAP_ARM:
3264                 cmd->data.diagass.options = 0x0003;
3265                 cmd->data.diagass.ext = 0x00010000 +
3266                         sizeof(struct qeth_trap_id);
3267                 qeth_get_trap_id(card,
3268                         (struct qeth_trap_id *)cmd->data.diagass.cdata);
3269                 break;
3270         case QETH_DIAGS_TRAP_DISARM:
3271                 cmd->data.diagass.options = 0x0001;
3272                 break;
3273         case QETH_DIAGS_TRAP_CAPTURE:
3274                 break;
3275         }
3276         return qeth_send_ipa_cmd(card, iob, qeth_hw_trap_cb, NULL);
3277 }
3278 EXPORT_SYMBOL_GPL(qeth_hw_trap);
3279 
3280 int qeth_check_qdio_errors(struct qeth_card *card, struct qdio_buffer *buf,
3281                 unsigned int qdio_error, const char *dbftext)
3282 {
3283         if (qdio_error) {
3284                 QETH_CARD_TEXT(card, 2, dbftext);
3285                 QETH_CARD_TEXT_(card, 2, " F15=%02X",
3286                                buf->element[15].sflags);
3287                 QETH_CARD_TEXT_(card, 2, " F14=%02X",
3288                                buf->element[14].sflags);
3289                 QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error);
3290                 if ((buf->element[15].sflags) == 0x12) {
3291                         card->stats.rx_dropped++;
3292                         return 0;
3293                 } else
3294                         return 1;
3295         }
3296         return 0;
3297 }
3298 EXPORT_SYMBOL_GPL(qeth_check_qdio_errors);
3299 
3300 static void qeth_buffer_reclaim_work(struct work_struct *work)
3301 {
3302         struct qeth_card *card = container_of(work, struct qeth_card,
3303                 buffer_reclaim_work.work);
3304 
3305         QETH_CARD_TEXT_(card, 2, "brw:%x", card->reclaim_index);
3306         qeth_queue_input_buffer(card, card->reclaim_index);
3307 }
3308 
3309 void qeth_queue_input_buffer(struct qeth_card *card, int index)
3310 {
3311         struct qeth_qdio_q *queue = card->qdio.in_q;
3312         struct list_head *lh;
3313         int count;
3314         int i;
3315         int rc;
3316         int newcount = 0;
3317 
3318         count = (index < queue->next_buf_to_init)?
3319                 card->qdio.in_buf_pool.buf_count -
3320                 (queue->next_buf_to_init - index) :
3321                 card->qdio.in_buf_pool.buf_count -
3322                 (queue->next_buf_to_init + QDIO_MAX_BUFFERS_PER_Q - index);
3323         /* only requeue at a certain threshold to avoid SIGAs */
3324         if (count >= QETH_IN_BUF_REQUEUE_THRESHOLD(card)) {
3325                 for (i = queue->next_buf_to_init;
3326                      i < queue->next_buf_to_init + count; ++i) {
3327                         if (qeth_init_input_buffer(card,
3328                                 &queue->bufs[i % QDIO_MAX_BUFFERS_PER_Q])) {
3329                                 break;
3330                         } else {
3331                                 newcount++;
3332                         }
3333                 }
3334 
3335                 if (newcount < count) {
3336                         /* we are in memory shortage so we switch back to
3337                            traditional skb allocation and drop packages */
3338                         atomic_set(&card->force_alloc_skb, 3);
3339                         count = newcount;
3340                 } else {
3341                         atomic_add_unless(&card->force_alloc_skb, -1, 0);
3342                 }
3343 
3344                 if (!count) {
3345                         i = 0;
3346                         list_for_each(lh, &card->qdio.in_buf_pool.entry_list)
3347                                 i++;
3348                         if (i == card->qdio.in_buf_pool.buf_count) {
3349                                 QETH_CARD_TEXT(card, 2, "qsarbw");
3350                                 card->reclaim_index = index;
3351                                 schedule_delayed_work(
3352                                         &card->buffer_reclaim_work,
3353                                         QETH_RECLAIM_WORK_TIME);
3354                         }
3355                         return;
3356                 }
3357 
3358                 /*
3359                  * according to old code it should be avoided to requeue all
3360                  * 128 buffers in order to benefit from PCI avoidance.
3361                  * this function keeps at least one buffer (the buffer at
3362                  * 'index') un-requeued -> this buffer is the first buffer that
3363                  * will be requeued the next time
3364                  */
3365                 if (card->options.performance_stats) {
3366                         card->perf_stats.inbound_do_qdio_cnt++;
3367                         card->perf_stats.inbound_do_qdio_start_time =
3368                                 qeth_get_micros();
3369                 }
3370                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0,
3371                              queue->next_buf_to_init, count);
3372                 if (card->options.performance_stats)
3373                         card->perf_stats.inbound_do_qdio_time +=
3374                                 qeth_get_micros() -
3375                                 card->perf_stats.inbound_do_qdio_start_time;
3376                 if (rc) {
3377                         QETH_CARD_TEXT(card, 2, "qinberr");
3378                 }
3379                 queue->next_buf_to_init = (queue->next_buf_to_init + count) %
3380                                           QDIO_MAX_BUFFERS_PER_Q;
3381         }
3382 }
3383 EXPORT_SYMBOL_GPL(qeth_queue_input_buffer);
3384 
3385 static int qeth_handle_send_error(struct qeth_card *card,
3386                 struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err)
3387 {
3388         int sbalf15 = buffer->buffer->element[15].sflags;
3389 
3390         QETH_CARD_TEXT(card, 6, "hdsnderr");
3391         if (card->info.type == QETH_CARD_TYPE_IQD) {
3392                 if (sbalf15 == 0) {
3393                         qdio_err = 0;
3394                 } else {
3395                         qdio_err = 1;
3396                 }
3397         }
3398         qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr");
3399 
3400         if (!qdio_err)
3401                 return QETH_SEND_ERROR_NONE;
3402 
3403         if ((sbalf15 >= 15) && (sbalf15 <= 31))
3404                 return QETH_SEND_ERROR_RETRY;
3405 
3406         QETH_CARD_TEXT(card, 1, "lnkfail");
3407         QETH_CARD_TEXT_(card, 1, "%04x %02x",
3408                        (u16)qdio_err, (u8)sbalf15);
3409         return QETH_SEND_ERROR_LINK_FAILURE;
3410 }
3411 
3412 /*
3413  * Switched to packing state if the number of used buffers on a queue
3414  * reaches a certain limit.
3415  */
3416 static void qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q *queue)
3417 {
3418         if (!queue->do_pack) {
3419                 if (atomic_read(&queue->used_buffers)
3420                     >= QETH_HIGH_WATERMARK_PACK){
3421                         /* switch non-PACKING -> PACKING */
3422                         QETH_CARD_TEXT(queue->card, 6, "np->pack");
3423                         if (queue->card->options.performance_stats)
3424                                 queue->card->perf_stats.sc_dp_p++;
3425                         queue->do_pack = 1;
3426                 }
3427         }
3428 }
3429 
3430 /*
3431  * Switches from packing to non-packing mode. If there is a packing
3432  * buffer on the queue this buffer will be prepared to be flushed.
3433  * In that case 1 is returned to inform the caller. If no buffer
3434  * has to be flushed, zero is returned.
3435  */
3436 static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue)
3437 {
3438         struct qeth_qdio_out_buffer *buffer;
3439         int flush_count = 0;
3440 
3441         if (queue->do_pack) {
3442                 if (atomic_read(&queue->used_buffers)
3443                     <= QETH_LOW_WATERMARK_PACK) {
3444                         /* switch PACKING -> non-PACKING */
3445                         QETH_CARD_TEXT(queue->card, 6, "pack->np");
3446                         if (queue->card->options.performance_stats)
3447                                 queue->card->perf_stats.sc_p_dp++;
3448                         queue->do_pack = 0;
3449                         /* flush packing buffers */
3450                         buffer = queue->bufs[queue->next_buf_to_fill];
3451                         if ((atomic_read(&buffer->state) ==
3452                                                 QETH_QDIO_BUF_EMPTY) &&
3453                             (buffer->next_element_to_fill > 0)) {
3454                                 atomic_set(&buffer->state,
3455                                            QETH_QDIO_BUF_PRIMED);
3456                                 flush_count++;
3457                                 queue->next_buf_to_fill =
3458                                         (queue->next_buf_to_fill + 1) %
3459                                         QDIO_MAX_BUFFERS_PER_Q;
3460                         }
3461                 }
3462         }
3463         return flush_count;
3464 }
3465 
3466 
3467 /*
3468  * Called to flush a packing buffer if no more pci flags are on the queue.
3469  * Checks if there is a packing buffer and prepares it to be flushed.
3470  * In that case returns 1, otherwise zero.
3471  */
3472 static int qeth_flush_buffers_on_no_pci(struct qeth_qdio_out_q *queue)
3473 {
3474         struct qeth_qdio_out_buffer *buffer;
3475 
3476         buffer = queue->bufs[queue->next_buf_to_fill];
3477         if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) &&
3478            (buffer->next_element_to_fill > 0)) {
3479                 /* it's a packing buffer */
3480                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3481                 queue->next_buf_to_fill =
3482                         (queue->next_buf_to_fill + 1) % QDIO_MAX_BUFFERS_PER_Q;
3483                 return 1;
3484         }
3485         return 0;
3486 }
3487 
3488 static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
3489                                int count)
3490 {
3491         struct qeth_qdio_out_buffer *buf;
3492         int rc;
3493         int i;
3494         unsigned int qdio_flags;
3495 
3496         for (i = index; i < index + count; ++i) {
3497                 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3498                 buf = queue->bufs[bidx];
3499                 buf->buffer->element[buf->next_element_to_fill - 1].eflags |=
3500                                 SBAL_EFLAGS_LAST_ENTRY;
3501 
3502                 if (queue->bufstates)
3503                         queue->bufstates[bidx].user = buf;
3504 
3505                 if (queue->card->info.type == QETH_CARD_TYPE_IQD)
3506                         continue;
3507 
3508                 if (!queue->do_pack) {
3509                         if ((atomic_read(&queue->used_buffers) >=
3510                                 (QETH_HIGH_WATERMARK_PACK -
3511                                  QETH_WATERMARK_PACK_FUZZ)) &&
3512                             !atomic_read(&queue->set_pci_flags_count)) {
3513                                 /* it's likely that we'll go to packing
3514                                  * mode soon */
3515                                 atomic_inc(&queue->set_pci_flags_count);
3516                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3517                         }
3518                 } else {
3519                         if (!atomic_read(&queue->set_pci_flags_count)) {
3520                                 /*
3521                                  * there's no outstanding PCI any more, so we
3522                                  * have to request a PCI to be sure the the PCI
3523                                  * will wake at some time in the future then we
3524                                  * can flush packed buffers that might still be
3525                                  * hanging around, which can happen if no
3526                                  * further send was requested by the stack
3527                                  */
3528                                 atomic_inc(&queue->set_pci_flags_count);
3529                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3530                         }
3531                 }
3532         }
3533 
3534         queue->card->dev->trans_start = jiffies;
3535         if (queue->card->options.performance_stats) {
3536                 queue->card->perf_stats.outbound_do_qdio_cnt++;
3537                 queue->card->perf_stats.outbound_do_qdio_start_time =
3538                         qeth_get_micros();
3539         }
3540         qdio_flags = QDIO_FLAG_SYNC_OUTPUT;
3541         if (atomic_read(&queue->set_pci_flags_count))
3542                 qdio_flags |= QDIO_FLAG_PCI_OUT;
3543         rc = do_QDIO(CARD_DDEV(queue->card), qdio_flags,
3544                      queue->queue_no, index, count);
3545         if (queue->card->options.performance_stats)
3546                 queue->card->perf_stats.outbound_do_qdio_time +=
3547                         qeth_get_micros() -
3548                         queue->card->perf_stats.outbound_do_qdio_start_time;
3549         atomic_add(count, &queue->used_buffers);
3550         if (rc) {
3551                 queue->card->stats.tx_errors += count;
3552                 /* ignore temporary SIGA errors without busy condition */
3553                 if (rc == -ENOBUFS)
3554                         return;
3555                 QETH_CARD_TEXT(queue->card, 2, "flushbuf");
3556                 QETH_CARD_TEXT_(queue->card, 2, " q%d", queue->queue_no);
3557                 QETH_CARD_TEXT_(queue->card, 2, " idx%d", index);
3558                 QETH_CARD_TEXT_(queue->card, 2, " c%d", count);
3559                 QETH_CARD_TEXT_(queue->card, 2, " err%d", rc);
3560 
3561                 /* this must not happen under normal circumstances. if it
3562                  * happens something is really wrong -> recover */
3563                 qeth_schedule_recovery(queue->card);
3564                 return;
3565         }
3566         if (queue->card->options.performance_stats)
3567                 queue->card->perf_stats.bufs_sent += count;
3568 }
3569 
3570 static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue)
3571 {
3572         int index;
3573         int flush_cnt = 0;
3574         int q_was_packing = 0;
3575 
3576         /*
3577          * check if weed have to switch to non-packing mode or if
3578          * we have to get a pci flag out on the queue
3579          */
3580         if ((atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) ||
3581             !atomic_read(&queue->set_pci_flags_count)) {
3582                 if (atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH) ==
3583                                 QETH_OUT_Q_UNLOCKED) {
3584                         /*
3585                          * If we get in here, there was no action in
3586                          * do_send_packet. So, we check if there is a
3587                          * packing buffer to be flushed here.
3588                          */
3589                         netif_stop_queue(queue->card->dev);
3590                         index = queue->next_buf_to_fill;
3591                         q_was_packing = queue->do_pack;
3592                         /* queue->do_pack may change */
3593                         barrier();
3594                         flush_cnt += qeth_switch_to_nonpacking_if_needed(queue);
3595                         if (!flush_cnt &&
3596                             !atomic_read(&queue->set_pci_flags_count))
3597                                 flush_cnt +=
3598                                         qeth_flush_buffers_on_no_pci(queue);
3599                         if (queue->card->options.performance_stats &&
3600                             q_was_packing)
3601                                 queue->card->perf_stats.bufs_sent_pack +=
3602                                         flush_cnt;
3603                         if (flush_cnt)
3604                                 qeth_flush_buffers(queue, index, flush_cnt);
3605                         atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
3606                 }
3607         }
3608 }
3609 
3610 void qeth_qdio_start_poll(struct ccw_device *ccwdev, int queue,
3611                 unsigned long card_ptr)
3612 {
3613         struct qeth_card *card = (struct qeth_card *)card_ptr;
3614 
3615         if (card->dev && (card->dev->flags & IFF_UP))
3616                 napi_schedule(&card->napi);
3617 }
3618 EXPORT_SYMBOL_GPL(qeth_qdio_start_poll);
3619 
3620 int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq)
3621 {
3622         int rc;
3623 
3624         if (card->options.cq ==  QETH_CQ_NOTAVAILABLE) {
3625                 rc = -1;
3626                 goto out;
3627         } else {
3628                 if (card->options.cq == cq) {
3629                         rc = 0;
3630                         goto out;
3631                 }
3632 
3633                 if (card->state != CARD_STATE_DOWN &&
3634                     card->state != CARD_STATE_RECOVER) {
3635                         rc = -1;
3636                         goto out;
3637                 }
3638 
3639                 qeth_free_qdio_buffers(card);
3640                 card->options.cq = cq;
3641                 rc = 0;
3642         }
3643 out:
3644         return rc;
3645 
3646 }
3647 EXPORT_SYMBOL_GPL(qeth_configure_cq);
3648 
3649 
3650 static void qeth_qdio_cq_handler(struct qeth_card *card,
3651                 unsigned int qdio_err,
3652                 unsigned int queue, int first_element, int count) {
3653         struct qeth_qdio_q *cq = card->qdio.c_q;
3654         int i;
3655         int rc;
3656 
3657         if (!qeth_is_cq(card, queue))
3658                 goto out;
3659 
3660         QETH_CARD_TEXT_(card, 5, "qcqhe%d", first_element);
3661         QETH_CARD_TEXT_(card, 5, "qcqhc%d", count);
3662         QETH_CARD_TEXT_(card, 5, "qcqherr%d", qdio_err);
3663 
3664         if (qdio_err) {
3665                 netif_stop_queue(card->dev);
3666                 qeth_schedule_recovery(card);
3667                 goto out;
3668         }
3669 
3670         if (card->options.performance_stats) {
3671                 card->perf_stats.cq_cnt++;
3672                 card->perf_stats.cq_start_time = qeth_get_micros();
3673         }
3674 
3675         for (i = first_element; i < first_element + count; ++i) {
3676                 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3677                 struct qdio_buffer *buffer = cq->qdio_bufs[bidx];
3678                 int e;
3679 
3680                 e = 0;
3681                 while (buffer->element[e].addr) {
3682                         unsigned long phys_aob_addr;
3683 
3684                         phys_aob_addr = (unsigned long) buffer->element[e].addr;
3685                         qeth_qdio_handle_aob(card, phys_aob_addr);
3686                         buffer->element[e].addr = NULL;
3687                         buffer->element[e].eflags = 0;
3688                         buffer->element[e].sflags = 0;
3689                         buffer->element[e].length = 0;
3690 
3691                         ++e;
3692                 }
3693 
3694                 buffer->element[15].eflags = 0;
3695                 buffer->element[15].sflags = 0;
3696         }
3697         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, queue,
3698                     card->qdio.c_q->next_buf_to_init,
3699                     count);
3700         if (rc) {
3701                 dev_warn(&card->gdev->dev,
3702                         "QDIO reported an error, rc=%i\n", rc);
3703                 QETH_CARD_TEXT(card, 2, "qcqherr");
3704         }
3705         card->qdio.c_q->next_buf_to_init = (card->qdio.c_q->next_buf_to_init
3706                                    + count) % QDIO_MAX_BUFFERS_PER_Q;
3707 
3708         netif_wake_queue(card->dev);
3709 
3710         if (card->options.performance_stats) {
3711                 int delta_t = qeth_get_micros();
3712                 delta_t -= card->perf_stats.cq_start_time;
3713                 card->perf_stats.cq_time += delta_t;
3714         }
3715 out:
3716         return;
3717 }
3718 
3719 void qeth_qdio_input_handler(struct ccw_device *ccwdev, unsigned int qdio_err,
3720                 unsigned int queue, int first_elem, int count,
3721                 unsigned long card_ptr)
3722 {
3723         struct qeth_card *card = (struct qeth_card *)card_ptr;
3724 
3725         QETH_CARD_TEXT_(card, 2, "qihq%d", queue);
3726         QETH_CARD_TEXT_(card, 2, "qiec%d", qdio_err);
3727 
3728         if (qeth_is_cq(card, queue))
3729                 qeth_qdio_cq_handler(card, qdio_err, queue, first_elem, count);
3730         else if (qdio_err)
3731                 qeth_schedule_recovery(card);
3732 
3733 
3734 }
3735 EXPORT_SYMBOL_GPL(qeth_qdio_input_handler);
3736 
3737 void qeth_qdio_output_handler(struct ccw_device *ccwdev,
3738                 unsigned int qdio_error, int __queue, int first_element,
3739                 int count, unsigned long card_ptr)
3740 {
3741         struct qeth_card *card        = (struct qeth_card *) card_ptr;
3742         struct qeth_qdio_out_q *queue = card->qdio.out_qs[__queue];
3743         struct qeth_qdio_out_buffer *buffer;
3744         int i;
3745 
3746         QETH_CARD_TEXT(card, 6, "qdouhdl");
3747         if (qdio_error & QDIO_ERROR_FATAL) {
3748                 QETH_CARD_TEXT(card, 2, "achkcond");
3749                 netif_stop_queue(card->dev);
3750                 qeth_schedule_recovery(card);
3751                 return;
3752         }
3753         if (card->options.performance_stats) {
3754                 card->perf_stats.outbound_handler_cnt++;
3755                 card->perf_stats.outbound_handler_start_time =
3756                         qeth_get_micros();
3757         }
3758         for (i = first_element; i < (first_element + count); ++i) {
3759                 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3760                 buffer = queue->bufs[bidx];
3761                 qeth_handle_send_error(card, buffer, qdio_error);
3762 
3763                 if (queue->bufstates &&
3764                     (queue->bufstates[bidx].flags &
3765                      QDIO_OUTBUF_STATE_FLAG_PENDING) != 0) {
3766                         WARN_ON_ONCE(card->options.cq != QETH_CQ_ENABLED);
3767 
3768                         if (atomic_cmpxchg(&buffer->state,
3769                                            QETH_QDIO_BUF_PRIMED,
3770                                            QETH_QDIO_BUF_PENDING) ==
3771                                 QETH_QDIO_BUF_PRIMED) {
3772                                 qeth_notify_skbs(queue, buffer,
3773                                                  TX_NOTIFY_PENDING);
3774                         }
3775                         buffer->aob = queue->bufstates[bidx].aob;
3776                         QETH_CARD_TEXT_(queue->card, 5, "pel%d", bidx);
3777                         QETH_CARD_TEXT(queue->card, 5, "aob");
3778                         QETH_CARD_TEXT_(queue->card, 5, "%lx",
3779                                         virt_to_phys(buffer->aob));
3780                         if (qeth_init_qdio_out_buf(queue, bidx)) {
3781                                 QETH_CARD_TEXT(card, 2, "outofbuf");
3782                                 qeth_schedule_recovery(card);
3783                         }
3784                 } else {
3785                         if (card->options.cq == QETH_CQ_ENABLED) {
3786                                 enum iucv_tx_notify n;
3787 
3788                                 n = qeth_compute_cq_notification(
3789                                         buffer->buffer->element[15].sflags, 0);
3790                                 qeth_notify_skbs(queue, buffer, n);
3791                         }
3792 
3793                         qeth_clear_output_buffer(queue, buffer,
3794                                                 QETH_QDIO_BUF_EMPTY);
3795                 }
3796                 qeth_cleanup_handled_pending(queue, bidx, 0);
3797         }
3798         atomic_sub(count, &queue->used_buffers);
3799         /* check if we need to do something on this outbound queue */
3800         if (card->info.type != QETH_CARD_TYPE_IQD)
3801                 qeth_check_outbound_queue(queue);
3802 
3803         netif_wake_queue(queue->card->dev);
3804         if (card->options.performance_stats)
3805                 card->perf_stats.outbound_handler_time += qeth_get_micros() -
3806                         card->perf_stats.outbound_handler_start_time;
3807 }
3808 EXPORT_SYMBOL_GPL(qeth_qdio_output_handler);
3809 
3810 /**
3811  * Note: Function assumes that we have 4 outbound queues.
3812  */
3813 int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb,
3814                         int ipv, int cast_type)
3815 {
3816         __be16 *tci;
3817         u8 tos;
3818 
3819         if (cast_type && card->info.is_multicast_different)
3820                 return card->info.is_multicast_different &
3821                         (card->qdio.no_out_queues - 1);
3822 
3823         switch (card->qdio.do_prio_queueing) {
3824         case QETH_PRIO_Q_ING_TOS:
3825         case QETH_PRIO_Q_ING_PREC:
3826                 switch (ipv) {
3827                 case 4:
3828                         tos = ipv4_get_dsfield(ip_hdr(skb));
3829                         break;
3830                 case 6:
3831                         tos = ipv6_get_dsfield(ipv6_hdr(skb));
3832                         break;
3833                 default:
3834                         return card->qdio.default_out_queue;
3835                 }
3836                 if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC)
3837                         return ~tos >> 6 & 3;
3838                 if (tos & IPTOS_MINCOST)
3839                         return 3;
3840                 if (tos & IPTOS_RELIABILITY)
3841                         return 2;
3842                 if (tos & IPTOS_THROUGHPUT)
3843                         return 1;
3844                 if (tos & IPTOS_LOWDELAY)
3845                         return 0;
3846                 break;
3847         case QETH_PRIO_Q_ING_SKB:
3848                 if (skb->priority > 5)
3849                         return 0;
3850                 return ~skb->priority >> 1 & 3;
3851         case QETH_PRIO_Q_ING_VLAN:
3852                 tci = &((struct ethhdr *)skb->data)->h_proto;
3853                 if (*tci == ETH_P_8021Q)
3854                         return ~*(tci + 1) >> (VLAN_PRIO_SHIFT + 1) & 3;
3855                 break;
3856         default:
3857                 break;
3858         }
3859         return card->qdio.default_out_queue;
3860 }
3861 EXPORT_SYMBOL_GPL(qeth_get_priority_queue);
3862 
3863 int qeth_get_elements_for_frags(struct sk_buff *skb)
3864 {
3865         int cnt, length, e, elements = 0;
3866         struct skb_frag_struct *frag;
3867         char *data;
3868 
3869         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3870                 frag = &skb_shinfo(skb)->frags[cnt];
3871                 data = (char *)page_to_phys(skb_frag_page(frag)) +
3872                         frag->page_offset;
3873                 length = frag->size;
3874                 e = PFN_UP((unsigned long)data + length - 1) -
3875                         PFN_DOWN((unsigned long)data);
3876                 elements += e;
3877         }
3878         return elements;
3879 }
3880 EXPORT_SYMBOL_GPL(qeth_get_elements_for_frags);
3881 
3882 int qeth_get_elements_no(struct qeth_card *card,
3883                      struct sk_buff *skb, int elems)
3884 {
3885         int dlen = skb->len - skb->data_len;
3886         int elements_needed = PFN_UP((unsigned long)skb->data + dlen - 1) -
3887                 PFN_DOWN((unsigned long)skb->data);
3888 
3889         elements_needed += qeth_get_elements_for_frags(skb);
3890 
3891         if ((elements_needed + elems) > QETH_MAX_BUFFER_ELEMENTS(card)) {
3892                 QETH_DBF_MESSAGE(2, "Invalid size of IP packet "
3893                         "(Number=%d / Length=%d). Discarded.\n",
3894                         (elements_needed+elems), skb->len);
3895                 return 0;
3896         }
3897         return elements_needed;
3898 }
3899 EXPORT_SYMBOL_GPL(qeth_get_elements_no);
3900 
3901 int qeth_hdr_chk_and_bounce(struct sk_buff *skb, struct qeth_hdr **hdr, int len)
3902 {
3903         int hroom, inpage, rest;
3904 
3905         if (((unsigned long)skb->data & PAGE_MASK) !=
3906             (((unsigned long)skb->data + len - 1) & PAGE_MASK)) {
3907                 hroom = skb_headroom(skb);
3908                 inpage = PAGE_SIZE - ((unsigned long) skb->data % PAGE_SIZE);
3909                 rest = len - inpage;
3910                 if (rest > hroom)
3911                         return 1;
3912                 memmove(skb->data - rest, skb->data, skb->len - skb->data_len);
3913                 skb->data -= rest;
3914                 skb->tail -= rest;
3915                 *hdr = (struct qeth_hdr *)skb->data;
3916                 QETH_DBF_MESSAGE(2, "skb bounce len: %d rest: %d\n", len, rest);
3917         }
3918         return 0;
3919 }
3920 EXPORT_SYMBOL_GPL(qeth_hdr_chk_and_bounce);
3921 
3922 static inline void __qeth_fill_buffer(struct sk_buff *skb,
3923         struct qdio_buffer *buffer, int is_tso, int *next_element_to_fill,
3924         int offset)
3925 {
3926         int length = skb->len - skb->data_len;
3927         int length_here;
3928         int element;
3929         char *data;
3930         int first_lap, cnt;
3931         struct skb_frag_struct *frag;
3932 
3933         element = *next_element_to_fill;
3934         data = skb->data;
3935         first_lap = (is_tso == 0 ? 1 : 0);
3936 
3937         if (offset >= 0) {
3938                 data = skb->data + offset;
3939                 length -= offset;
3940                 first_lap = 0;
3941         }
3942 
3943         while (length > 0) {
3944                 /* length_here is the remaining amount of data in this page */
3945                 length_here = PAGE_SIZE - ((unsigned long) data % PAGE_SIZE);
3946                 if (length < length_here)
3947                         length_here = length;
3948 
3949                 buffer->element[element].addr = data;
3950                 buffer->element[element].length = length_here;
3951                 length -= length_here;
3952                 if (!length) {
3953                         if (first_lap)
3954                                 if (skb_shinfo(skb)->nr_frags)
3955                                         buffer->element[element].eflags =
3956                                                 SBAL_EFLAGS_FIRST_FRAG;
3957                                 else
3958                                         buffer->element[element].eflags = 0;
3959                         else
3960                                 buffer->element[element].eflags =
3961                                     SBAL_EFLAGS_MIDDLE_FRAG;
3962                 } else {
3963                         if (first_lap)
3964                                 buffer->element[element].eflags =
3965                                     SBAL_EFLAGS_FIRST_FRAG;
3966                         else
3967                                 buffer->element[element].eflags =
3968                                     SBAL_EFLAGS_MIDDLE_FRAG;
3969                 }
3970                 data += length_here;
3971                 element++;
3972                 first_lap = 0;
3973         }
3974 
3975         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3976                 frag = &skb_shinfo(skb)->frags[cnt];
3977                 data = (char *)page_to_phys(skb_frag_page(frag)) +
3978                         frag->page_offset;
3979                 length = frag->size;
3980                 while (length > 0) {
3981                         length_here = PAGE_SIZE -
3982                                 ((unsigned long) data % PAGE_SIZE);
3983                         if (length < length_here)
3984                                 length_here = length;
3985 
3986                         buffer->element[element].addr = data;
3987                         buffer->element[element].length = length_here;
3988                         buffer->element[element].eflags =
3989                                 SBAL_EFLAGS_MIDDLE_FRAG;
3990                         length -= length_here;
3991                         data += length_here;
3992                         element++;
3993                 }
3994         }
3995 
3996         if (buffer->element[element - 1].eflags)
3997                 buffer->element[element - 1].eflags = SBAL_EFLAGS_LAST_FRAG;
3998         *next_element_to_fill = element;
3999 }
4000 
4001 static inline int qeth_fill_buffer(struct qeth_qdio_out_q *queue,
4002                 struct qeth_qdio_out_buffer *buf, struct sk_buff *skb,
4003                 struct qeth_hdr *hdr, int offset, int hd_len)
4004 {
4005         struct qdio_buffer *buffer;
4006         int flush_cnt = 0, hdr_len, large_send = 0;
4007 
4008         buffer = buf->buffer;
4009         atomic_inc(&skb->users);
4010         skb_queue_tail(&buf->skb_list, skb);
4011 
4012         /*check first on TSO ....*/
4013         if (hdr->hdr.l3.id == QETH_HEADER_TYPE_TSO) {
4014                 int element = buf->next_element_to_fill;
4015 
4016                 hdr_len = sizeof(struct qeth_hdr_tso) +
4017                         ((struct qeth_hdr_tso *)hdr)->ext.dg_hdr_len;
4018                 /*fill first buffer entry only with header information */
4019                 buffer->element[element].addr = skb->data;
4020                 buffer->element[element].length = hdr_len;
4021                 buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
4022                 buf->next_element_to_fill++;
4023                 skb->data += hdr_len;
4024                 skb->len  -= hdr_len;
4025                 large_send = 1;
4026         }
4027 
4028         if (offset >= 0) {
4029                 int element = buf->next_element_to_fill;
4030                 buffer->element[element].addr = hdr;
4031                 buffer->element[element].length = sizeof(struct qeth_hdr) +
4032                                                         hd_len;
4033                 buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
4034                 buf->is_header[element] = 1;
4035                 buf->next_element_to_fill++;
4036         }
4037 
4038         __qeth_fill_buffer(skb, buffer, large_send,
4039                 (int *)&buf->next_element_to_fill, offset);
4040 
4041         if (!queue->do_pack) {
4042                 QETH_CARD_TEXT(queue->card, 6, "fillbfnp");
4043                 /* set state to PRIMED -> will be flushed */
4044                 atomic_set(&buf->state, QETH_QDIO_BUF_PRIMED);
4045                 flush_cnt = 1;
4046         } else {
4047                 QETH_CARD_TEXT(queue->card, 6, "fillbfpa");
4048                 if (queue->card->options.performance_stats)
4049                         queue->card->perf_stats.skbs_sent_pack++;
4050                 if (buf->next_element_to_fill >=
4051                                 QETH_MAX_BUFFER_ELEMENTS(queue->card)) {
4052                         /*
4053                          * packed buffer if full -> set state PRIMED
4054                          * -> will be flushed
4055                          */
4056                         atomic_set(&buf->state, QETH_QDIO_BUF_PRIMED);
4057                         flush_cnt = 1;
4058                 }
4059         }
4060         return flush_cnt;
4061 }
4062 
4063 int qeth_do_send_packet_fast(struct qeth_card *card,
4064                 struct qeth_qdio_out_q *queue, struct sk_buff *skb,
4065                 struct qeth_hdr *hdr, int elements_needed,
4066                 int offset, int hd_len)
4067 {
4068         struct qeth_qdio_out_buffer *buffer;
4069         int index;
4070 
4071         /* spin until we get the queue ... */
4072         while (atomic_cmpxchg(&queue->state, QETH_OUT_Q_UNLOCKED,
4073                               QETH_OUT_Q_LOCKED) != QETH_OUT_Q_UNLOCKED);
4074         /* ... now we've got the queue */
4075         index = queue->next_buf_to_fill;
4076         buffer = queue->bufs[queue->next_buf_to_fill];
4077         /*
4078          * check if buffer is empty to make sure that we do not 'overtake'
4079          * ourselves and try to fill a buffer that is already primed
4080          */
4081         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4082                 goto out;
4083         queue->next_buf_to_fill = (queue->next_buf_to_fill + 1) %
4084                                           QDIO_MAX_BUFFERS_PER_Q;
4085         atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
4086         qeth_fill_buffer(queue, buffer, skb, hdr, offset, hd_len);
4087         qeth_flush_buffers(queue, index, 1);
4088         return 0;
4089 out:
4090         atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
4091         return -EBUSY;
4092 }
4093 EXPORT_SYMBOL_GPL(qeth_do_send_packet_fast);
4094 
4095 int qeth_do_send_packet(struct qeth_card *card, struct qeth_qdio_out_q *queue,
4096                 struct sk_buff *skb, struct qeth_hdr *hdr,
4097                 int elements_needed)
4098 {
4099         struct qeth_qdio_out_buffer *buffer;
4100         int start_index;
4101         int flush_count = 0;
4102         int do_pack = 0;
4103         int tmp;
4104         int rc = 0;
4105 
4106         /* spin until we get the queue ... */
4107         while (atomic_cmpxchg(&queue->state, QETH_OUT_Q_UNLOCKED,
4108                               QETH_OUT_Q_LOCKED) != QETH_OUT_Q_UNLOCKED);
4109         start_index = queue->next_buf_to_fill;
4110         buffer = queue->bufs[queue->next_buf_to_fill];
4111         /*
4112          * check if buffer is empty to make sure that we do not 'overtake'
4113          * ourselves and try to fill a buffer that is already primed
4114          */
4115         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY) {
4116                 atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
4117                 return -EBUSY;
4118         }
4119         /* check if we need to switch packing state of this queue */
4120         qeth_switch_to_packing_if_needed(queue);
4121         if (queue->do_pack) {
4122                 do_pack = 1;
4123                 /* does packet fit in current buffer? */
4124                 if ((QETH_MAX_BUFFER_ELEMENTS(card) -
4125                     buffer->next_element_to_fill) < elements_needed) {
4126                         /* ... no -> set state PRIMED */
4127                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4128                         flush_count++;
4129                         queue->next_buf_to_fill =
4130                                 (queue->next_buf_to_fill + 1) %
4131                                 QDIO_MAX_BUFFERS_PER_Q;
4132                         buffer = queue->bufs[queue->next_buf_to_fill];
4133                         /* we did a step forward, so check buffer state
4134                          * again */
4135                         if (atomic_read(&buffer->state) !=
4136                             QETH_QDIO_BUF_EMPTY) {
4137                                 qeth_flush_buffers(queue, start_index,
4138                                                            flush_count);
4139                                 atomic_set(&queue->state,
4140                                                 QETH_OUT_Q_UNLOCKED);
4141                                 return -EBUSY;
4142                         }
4143                 }
4144         }
4145         tmp = qeth_fill_buffer(queue, buffer, skb, hdr, -1, 0);
4146         queue->next_buf_to_fill = (queue->next_buf_to_fill + tmp) %
4147                                   QDIO_MAX_BUFFERS_PER_Q;
4148         flush_count += tmp;
4149         if (flush_count)
4150                 qeth_flush_buffers(queue, start_index, flush_count);
4151         else if (!atomic_read(&queue->set_pci_flags_count))
4152                 atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH);
4153         /*
4154          * queue->state will go from LOCKED -> UNLOCKED or from
4155          * LOCKED_FLUSH -> LOCKED if output_handler wanted to 'notify' us
4156          * (switch packing state or flush buffer to get another pci flag out).
4157          * In that case we will enter this loop
4158          */
4159         while (atomic_dec_return(&queue->state)) {
4160                 flush_count = 0;
4161                 start_index = queue->next_buf_to_fill;
4162                 /* check if we can go back to non-packing state */
4163                 flush_count += qeth_switch_to_nonpacking_if_needed(queue);
4164                 /*
4165                  * check if we need to flush a packing buffer to get a pci
4166                  * flag out on the queue
4167                  */
4168                 if (!flush_count && !atomic_read(&queue->set_pci_flags_count))
4169                         flush_count += qeth_flush_buffers_on_no_pci(queue);
4170                 if (flush_count)
4171                         qeth_flush_buffers(queue, start_index, flush_count);
4172         }
4173         /* at this point the queue is UNLOCKED again */
4174         if (queue->card->options.performance_stats && do_pack)
4175                 queue->card->perf_stats.bufs_sent_pack += flush_count;
4176 
4177         return rc;
4178 }
4179 EXPORT_SYMBOL_GPL(qeth_do_send_packet);
4180 
4181 static int qeth_setadp_promisc_mode_cb(struct qeth_card *card,
4182                 struct qeth_reply *reply, unsigned long data)
4183 {
4184         struct qeth_ipa_cmd *cmd;
4185         struct qeth_ipacmd_setadpparms *setparms;
4186 
4187         QETH_CARD_TEXT(card, 4, "prmadpcb");
4188 
4189         cmd = (struct qeth_ipa_cmd *) data;
4190         setparms = &(cmd->data.setadapterparms);
4191 
4192         qeth_default_setadapterparms_cb(card, reply, (unsigned long)cmd);
4193         if (cmd->hdr.return_code) {
4194                 QETH_CARD_TEXT_(card, 4, "prmrc%x", cmd->hdr.return_code);
4195                 setparms->data.mode = SET_PROMISC_MODE_OFF;
4196         }
4197         card->info.promisc_mode = setparms->data.mode;
4198         return 0;
4199 }
4200 
4201 void qeth_setadp_promisc_mode(struct qeth_card *card)
4202 {
4203         enum qeth_ipa_promisc_modes mode;
4204         struct net_device *dev = card->dev;
4205         struct qeth_cmd_buffer *iob;
4206         struct qeth_ipa_cmd *cmd;
4207 
4208         QETH_CARD_TEXT(card, 4, "setprom");
4209 
4210         if (((dev->flags & IFF_PROMISC) &&
4211              (card->info.promisc_mode == SET_PROMISC_MODE_ON)) ||
4212             (!(dev->flags & IFF_PROMISC) &&
4213              (card->info.promisc_mode == SET_PROMISC_MODE_OFF)))
4214                 return;
4215         mode = SET_PROMISC_MODE_OFF;
4216         if (dev->flags & IFF_PROMISC)
4217                 mode = SET_PROMISC_MODE_ON;
4218         QETH_CARD_TEXT_(card, 4, "mode:%x", mode);
4219 
4220         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE,
4221                         sizeof(struct qeth_ipacmd_setadpparms_hdr) + 8);
4222         if (!iob)
4223                 return;
4224         cmd = (struct qeth_ipa_cmd *)(iob->data + IPA_PDU_HEADER_SIZE);
4225         cmd->data.setadapterparms.data.mode = mode;
4226         qeth_send_ipa_cmd(card, iob, qeth_setadp_promisc_mode_cb, NULL);
4227 }
4228 EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode);
4229 
4230 int qeth_change_mtu(struct net_device *dev, int new_mtu)
4231 {
4232         struct qeth_card *card;
4233         char dbf_text[15];
4234 
4235         card = dev->ml_priv;
4236 
4237         QETH_CARD_TEXT(card, 4, "chgmtu");
4238         sprintf(dbf_text, "%8x", new_mtu);
4239         QETH_CARD_TEXT(card, 4, dbf_text);
4240 
4241         if (new_mtu < 64)
4242                 return -EINVAL;
4243         if (new_mtu > 65535)
4244                 return -EINVAL;
4245         if ((!qeth_is_supported(card, IPA_IP_FRAGMENTATION)) &&
4246             (!qeth_mtu_is_valid(card, new_mtu)))
4247                 return -EINVAL;
4248         dev->mtu = new_mtu;
4249         return 0;
4250 }
4251 EXPORT_SYMBOL_GPL(qeth_change_mtu);
4252 
4253 struct net_device_stats *qeth_get_stats(struct net_device *dev)
4254 {
4255         struct qeth_card *card;
4256 
4257         card = dev->ml_priv;
4258 
4259         QETH_CARD_TEXT(card, 5, "getstat");
4260 
4261         return &card->stats;
4262 }
4263 EXPORT_SYMBOL_GPL(qeth_get_stats);
4264 
4265 static int qeth_setadpparms_change_macaddr_cb(struct qeth_card *card,
4266                 struct qeth_reply *reply, unsigned long data)
4267 {
4268         struct qeth_ipa_cmd *cmd;
4269 
4270         QETH_CARD_TEXT(card, 4, "chgmaccb");
4271 
4272         cmd = (struct qeth_ipa_cmd *) data;
4273         if (!card->options.layer2 ||
4274             !(card->info.mac_bits & QETH_LAYER2_MAC_READ)) {
4275                 memcpy(card->dev->dev_addr,
4276                        &cmd->data.setadapterparms.data.change_addr.addr,
4277                        OSA_ADDR_LEN);
4278                 card->info.mac_bits |= QETH_LAYER2_MAC_READ;
4279         }
4280         qeth_default_setadapterparms_cb(card, reply, (unsigned long) cmd);
4281         return 0;
4282 }
4283 
4284 int qeth_setadpparms_change_macaddr(struct qeth_card *card)
4285 {
4286         int rc;
4287         struct qeth_cmd_buffer *iob;
4288         struct qeth_ipa_cmd *cmd;
4289 
4290         QETH_CARD_TEXT(card, 4, "chgmac");
4291 
4292         iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS,
4293                                    sizeof(struct qeth_ipacmd_setadpparms_hdr) +
4294                                    sizeof(struct qeth_change_addr));
4295         if (!iob)
4296                 return -ENOMEM;
4297         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
4298         cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC;
4299         cmd->data.setadapterparms.data.change_addr.addr_size = OSA_ADDR_LEN;
4300         memcpy(&cmd->data.setadapterparms.data.change_addr.addr,
4301                card->dev->dev_addr, OSA_ADDR_LEN);
4302         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_change_macaddr_cb,
4303                                NULL);
4304         return rc;
4305 }
4306 EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr);
4307 
4308 static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card,
4309                 struct qeth_reply *reply, unsigned long data)
4310 {
4311         struct qeth_ipa_cmd *cmd;
4312         struct qeth_set_access_ctrl *access_ctrl_req;
4313         int fallback = *(int *)reply->param;
4314 
4315         QETH_CARD_TEXT(card, 4, "setaccb");
4316 
4317         cmd = (struct qeth_ipa_cmd *) data;
4318         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4319         QETH_DBF_TEXT_(SETUP, 2, "setaccb");
4320         QETH_DBF_TEXT_(SETUP, 2, "%s", card->gdev->dev.kobj.name);
4321         QETH_DBF_TEXT_(SETUP, 2, "rc=%d",
4322                 cmd->data.setadapterparms.hdr.return_code);
4323         if (cmd->data.setadapterparms.hdr.return_code !=
4324                                                 SET_ACCESS_CTRL_RC_SUCCESS)
4325                 QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%s,%d)==%d\n",
4326                                 card->gdev->dev.kobj.name,
4327                                 access_ctrl_req->subcmd_code,
4328                                 cmd->data.setadapterparms.hdr.return_code);
4329         switch (cmd->data.setadapterparms.hdr.return_code) {
4330         case SET_ACCESS_CTRL_RC_SUCCESS:
4331                 if (card->options.isolation == ISOLATION_MODE_NONE) {
4332                         dev_info(&card->gdev->dev,
4333                             "QDIO data connection isolation is deactivated\n");
4334                 } else {
4335                         dev_info(&card->gdev->dev,
4336                             "QDIO data connection isolation is activated\n");
4337                 }
4338                 break;
4339         case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
4340                 QETH_DBF_MESSAGE(2, "%s QDIO data connection isolation already "
4341                                 "deactivated\n", dev_name(&card->gdev->dev));
4342                 if (fallback)
4343                         card->options.isolation = card->options.prev_isolation;
4344                 break;
4345         case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
4346                 QETH_DBF_MESSAGE(2, "%s QDIO data connection isolation already"
4347                                 " activated\n", dev_name(&card->gdev->dev));
4348                 if (fallback)
4349                         card->options.isolation = card->options.prev_isolation;
4350                 break;
4351         case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
4352                 dev_err(&card->gdev->dev, "Adapter does not "
4353                         "support QDIO data connection isolation\n");
4354                 break;
4355         case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
4356                 dev_err(&card->gdev->dev,
4357                         "Adapter is dedicated. "
4358                         "QDIO data connection isolation not supported\n");
4359                 if (fallback)
4360                         card->options.isolation = card->options.prev_isolation;
4361                 break;
4362         case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
4363                 dev_err(&card->gdev->dev,
4364                         "TSO does not permit QDIO data connection isolation\n");
4365                 if (fallback)
4366                         card->options.isolation = card->options.prev_isolation;
4367                 break;
4368         case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED:
4369                 dev_err(&card->gdev->dev, "The adjacent switch port does not "
4370                         "support reflective relay mode\n");
4371                 if (fallback)
4372                         card->options.isolation = card->options.prev_isolation;
4373                 break;
4374         case SET_ACCESS_CTRL_RC_REFLREL_FAILED:
4375                 dev_err(&card->gdev->dev, "The reflective relay mode cannot be "
4376                                         "enabled at the adjacent switch port");
4377                 if (fallback)
4378                         card->options.isolation = card->options.prev_isolation;
4379                 break;
4380         case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED:
4381                 dev_warn(&card->gdev->dev, "Turning off reflective relay mode "
4382                                         "at the adjacent switch failed\n");
4383                 break;
4384         default:
4385                 /* this should never happen */
4386                 if (fallback)
4387                         card->options.isolation = card->options.prev_isolation;
4388                 break;
4389         }
4390         qeth_default_setadapterparms_cb(card, reply, (unsigned long) cmd);
4391         return 0;
4392 }
4393 
4394 static int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
4395                 enum qeth_ipa_isolation_modes isolation, int fallback)
4396 {
4397         int rc;
4398         struct qeth_cmd_buffer *iob;
4399         struct qeth_ipa_cmd *cmd;
4400         struct qeth_set_access_ctrl *access_ctrl_req;
4401 
4402         QETH_CARD_TEXT(card, 4, "setacctl");
4403 
4404         QETH_DBF_TEXT_(SETUP, 2, "setacctl");
4405         QETH_DBF_TEXT_(SETUP, 2, "%s", card->gdev->dev.kobj.name);
4406 
4407         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
4408                                    sizeof(struct qeth_ipacmd_setadpparms_hdr) +
4409                                    sizeof(struct qeth_set_access_ctrl));
4410         if (!iob)
4411                 return -ENOMEM;
4412         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
4413         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4414         access_ctrl_req->subcmd_code = isolation;
4415 
4416         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb,
4417                                &fallback);
4418         QETH_DBF_TEXT_(SETUP, 2, "rc=%d", rc);
4419         return rc;
4420 }
4421 
4422 int qeth_set_access_ctrl_online(struct qeth_card *card, int fallback)
4423 {
4424         int rc = 0;
4425 
4426         QETH_CARD_TEXT(card, 4, "setactlo");
4427 
4428         if ((card->info.type == QETH_CARD_TYPE_OSD ||
4429              card->info.type == QETH_CARD_TYPE_OSX) &&
4430              qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
4431                 rc = qeth_setadpparms_set_access_ctrl(card,
4432                         card->options.isolation, fallback);
4433                 if (rc) {
4434                         QETH_DBF_MESSAGE(3,
4435                                 "IPA(SET_ACCESS_CTRL,%s,%d) sent failed\n",
4436                                 card->gdev->dev.kobj.name,
4437                                 rc);
4438                         rc = -EOPNOTSUPP;
4439                 }
4440         } else if (card->options.isolation != ISOLATION_MODE_NONE) {
4441                 card->options.isolation = ISOLATION_MODE_NONE;
4442 
4443                 dev_err(&card->gdev->dev, "Adapter does not "
4444                         "support QDIO data connection isolation\n");
4445                 rc = -EOPNOTSUPP;
4446         }
4447         return rc;
4448 }
4449 EXPORT_SYMBOL_GPL(qeth_set_access_ctrl_online);
4450 
4451 void qeth_tx_timeout(struct net_device *dev)
4452 {
4453         struct qeth_card *card;
4454 
4455         card = dev->ml_priv;
4456         QETH_CARD_TEXT(card, 4, "txtimeo");
4457         card->stats.tx_errors++;
4458         qeth_schedule_recovery(card);
4459 }
4460 EXPORT_SYMBOL_GPL(qeth_tx_timeout);
4461 
4462 int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum)
4463 {
4464         struct qeth_card *card = dev->ml_priv;
4465         int rc = 0;
4466 
4467         switch (regnum) {
4468         case MII_BMCR: /* Basic mode control register */
4469                 rc = BMCR_FULLDPLX;
4470                 if ((card->info.link_type != QETH_LINK_TYPE_GBIT_ETH) &&
4471                     (card->info.link_type != QETH_LINK_TYPE_OSN) &&
4472                     (card->info.link_type != QETH_LINK_TYPE_10GBIT_ETH))
4473                         rc |= BMCR_SPEED100;
4474                 break;
4475         case MII_BMSR: /* Basic mode status register */
4476                 rc = BMSR_ERCAP | BMSR_ANEGCOMPLETE | BMSR_LSTATUS |
4477                      BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL |
4478                      BMSR_100BASE4;
4479                 break;
4480         case MII_PHYSID1: /* PHYS ID 1 */
4481                 rc = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 8) |
4482                      dev->dev_addr[2];
4483                 rc = (rc >> 5) & 0xFFFF;
4484                 break;
4485         case MII_PHYSID2: /* PHYS ID 2 */
4486                 rc = (dev->dev_addr[2] << 10) & 0xFFFF;
4487                 break;
4488         case MII_ADVERTISE: /* Advertisement control reg */
4489                 rc = ADVERTISE_ALL;
4490                 break;
4491         case MII_LPA: /* Link partner ability reg */
4492                 rc = LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL |
4493                      LPA_100BASE4 | LPA_LPACK;
4494                 break;
4495         case MII_EXPANSION: /* Expansion register */
4496                 break;
4497         case MII_DCOUNTER: /* disconnect counter */
4498                 break;
4499         case MII_FCSCOUNTER: /* false carrier counter */
4500                 break;
4501         case MII_NWAYTEST: /* N-way auto-neg test register */
4502                 break;
4503         case MII_RERRCOUNTER: /* rx error counter */
4504                 rc = card->stats.rx_errors;
4505                 break;
4506         case MII_SREVISION: /* silicon revision */
4507                 break;
4508         case MII_RESV1: /* reserved 1 */
4509                 break;
4510         case MII_LBRERROR: /* loopback, rx, bypass error */
4511                 break;
4512         case MII_PHYADDR: /* physical address */
4513                 break;
4514         case MII_RESV2: /* reserved 2 */
4515                 break;
4516         case MII_TPISTATUS: /* TPI status for 10mbps */
4517                 break;
4518         case MII_NCONFIG: /* network interface config */
4519                 break;
4520         default:
4521                 break;
4522         }
4523         return rc;
4524 }
4525 EXPORT_SYMBOL_GPL(qeth_mdio_read);
4526 
4527 static int qeth_send_ipa_snmp_cmd(struct qeth_card *card,
4528                 struct qeth_cmd_buffer *iob, int len,
4529                 int (*reply_cb)(struct qeth_card *, struct qeth_reply *,
4530                         unsigned long),
4531                 void *reply_param)
4532 {
4533         u16 s1, s2;
4534 
4535         QETH_CARD_TEXT(card, 4, "sendsnmp");
4536 
4537         memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
4538         memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
4539                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
4540         /* adjust PDU length fields in IPA_PDU_HEADER */
4541         s1 = (u32) IPA_PDU_HEADER_SIZE + len;
4542         s2 = (u32) len;
4543         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
4544         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
4545         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
4546         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
4547         return qeth_send_control_data(card, IPA_PDU_HEADER_SIZE + len, iob,
4548                                       reply_cb, reply_param);
4549 }
4550 
4551 static int qeth_snmp_command_cb(struct qeth_card *card,
4552                 struct qeth_reply *reply, unsigned long sdata)
4553 {
4554         struct qeth_ipa_cmd *cmd;
4555         struct qeth_arp_query_info *qinfo;
4556         struct qeth_snmp_cmd *snmp;
4557         unsigned char *data;
4558         __u16 data_len;
4559 
4560         QETH_CARD_TEXT(card, 3, "snpcmdcb");
4561 
4562         cmd = (struct qeth_ipa_cmd *) sdata;
4563         data = (unsigned char *)((char *)cmd - reply->offset);
4564         qinfo = (struct qeth_arp_query_info *) reply->param;
4565         snmp = &cmd->data.setadapterparms.data.snmp;
4566 
4567         if (cmd->hdr.return_code) {
4568                 QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code);
4569                 return 0;
4570         }
4571         if (cmd->data.setadapterparms.hdr.return_code) {
4572                 cmd->hdr.return_code =
4573                         cmd->data.setadapterparms.hdr.return_code;
4574                 QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code);
4575                 return 0;
4576         }
4577         data_len = *((__u16 *)QETH_IPA_PDU_LEN_PDU1(data));
4578         if (cmd->data.setadapterparms.hdr.seq_no == 1)
4579                 data_len -= (__u16)((char *)&snmp->data - (char *)cmd);
4580         else
4581                 data_len -= (__u16)((char *)&snmp->request - (char *)cmd);
4582 
4583         /* check if there is enough room in userspace */
4584         if ((qinfo->udata_len - qinfo->udata_offset) < data_len) {
4585                 QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOMEM);
4586                 cmd->hdr.return_code = IPA_RC_ENOMEM;
4587                 return 0;
4588         }
4589         QETH_CARD_TEXT_(card, 4, "snore%i",
4590                        cmd->data.setadapterparms.hdr.used_total);
4591         QETH_CARD_TEXT_(card, 4, "sseqn%i",
4592                 cmd->data.setadapterparms.hdr.seq_no);
4593         /*copy entries to user buffer*/
4594         if (cmd->data.setadapterparms.hdr.seq_no == 1) {
4595                 memcpy(qinfo->udata + qinfo->udata_offset,
4596                        (char *)snmp,
4597                        data_len + offsetof(struct qeth_snmp_cmd, data));
4598                 qinfo->udata_offset += offsetof(struct qeth_snmp_cmd, data);
4599         } else {
4600                 memcpy(qinfo->udata + qinfo->udata_offset,
4601                        (char *)&snmp->request, data_len);
4602         }
4603         qinfo->udata_offset += data_len;
4604         /* check if all replies received ... */
4605                 QETH_CARD_TEXT_(card, 4, "srtot%i",
4606                                cmd->data.setadapterparms.hdr.used_total);
4607                 QETH_CARD_TEXT_(card, 4, "srseq%i",
4608                                cmd->data.setadapterparms.hdr.seq_no);
4609         if (cmd->data.setadapterparms.hdr.seq_no <
4610             cmd->data.setadapterparms.hdr.used_total)
4611                 return 1;
4612         return 0;
4613 }
4614 
4615 int qeth_snmp_command(struct qeth_card *card, char __user *udata)
4616 {
4617         struct qeth_cmd_buffer *iob;
4618         struct qeth_ipa_cmd *cmd;
4619         struct qeth_snmp_ureq *ureq;
4620         unsigned int req_len;
4621         struct qeth_arp_query_info qinfo = {0, };
4622         int rc = 0;
4623 
4624         QETH_CARD_TEXT(card, 3, "snmpcmd");
4625 
4626         if (card->info.guestlan)
4627                 return -EOPNOTSUPP;
4628 
4629         if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) &&
4630             (!card->options.layer2)) {
4631                 return -EOPNOTSUPP;
4632         }
4633         /* skip 4 bytes (data_len struct member) to get req_len */
4634         if (copy_from_user(&req_len, udata + sizeof(int), sizeof(int)))
4635                 return -EFAULT;
4636         if (req_len > (QETH_BUFSIZE - IPA_PDU_HEADER_SIZE -
4637                        sizeof(struct qeth_ipacmd_hdr) -
4638                        sizeof(struct qeth_ipacmd_setadpparms_hdr)))
4639                 return -EINVAL;
4640         ureq = memdup_user(udata, req_len + sizeof(struct qeth_snmp_ureq_hdr));
4641         if (IS_ERR(ureq)) {
4642                 QETH_CARD_TEXT(card, 2, "snmpnome");
4643                 return PTR_ERR(ureq);
4644         }
4645         qinfo.udata_len = ureq->hdr.data_len;
4646         qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
4647         if (!qinfo.udata) {
4648                 kfree(ureq);
4649                 return -ENOMEM;
4650         }
4651         qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr);
4652 
4653         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL,
4654                                    QETH_SNMP_SETADP_CMDLENGTH + req_len);
4655         if (!iob) {
4656                 rc = -ENOMEM;
4657                 goto out;
4658         }
4659         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
4660         memcpy(&cmd->data.setadapterparms.data.snmp, &ureq->cmd, req_len);
4661         rc = qeth_send_ipa_snmp_cmd(card, iob, QETH_SETADP_BASE_LEN + req_len,
4662                                     qeth_snmp_command_cb, (void *)&qinfo);
4663         if (rc)
4664                 QETH_DBF_MESSAGE(2, "SNMP command failed on %s: (0x%x)\n",
4665                            QETH_CARD_IFNAME(card), rc);
4666         else {
4667                 if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
4668                         rc = -EFAULT;
4669         }
4670 out:
4671         kfree(ureq);
4672         kfree(qinfo.udata);
4673         return rc;
4674 }
4675 EXPORT_SYMBOL_GPL(qeth_snmp_command);
4676 
4677 static int qeth_setadpparms_query_oat_cb(struct qeth_card *card,
4678                 struct qeth_reply *reply, unsigned long data)
4679 {
4680         struct qeth_ipa_cmd *cmd;
4681         struct qeth_qoat_priv *priv;
4682         char *resdata;
4683         int resdatalen;
4684 
4685         QETH_CARD_TEXT(card, 3, "qoatcb");
4686 
4687         cmd = (struct qeth_ipa_cmd *)data;
4688         priv = (struct qeth_qoat_priv *)reply->param;
4689         resdatalen = cmd->data.setadapterparms.hdr.cmdlength;
4690         resdata = (char *)data + 28;
4691 
4692         if (resdatalen > (priv->buffer_len - priv->response_len)) {
4693                 cmd->hdr.return_code = IPA_RC_FFFF;
4694                 return 0;
4695         }
4696 
4697         memcpy((priv->buffer + priv->response_len), resdata,
4698                 resdatalen);
4699         priv->response_len += resdatalen;
4700 
4701         if (cmd->data.setadapterparms.hdr.seq_no <
4702             cmd->data.setadapterparms.hdr.used_total)
4703                 return 1;
4704         return 0;
4705 }
4706 
4707 int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
4708 {
4709         int rc = 0;
4710         struct qeth_cmd_buffer *iob;
4711         struct qeth_ipa_cmd *cmd;
4712         struct qeth_query_oat *oat_req;
4713         struct qeth_query_oat_data oat_data;
4714         struct qeth_qoat_priv priv;
4715         void __user *tmp;
4716 
4717         QETH_CARD_TEXT(card, 3, "qoatcmd");
4718 
4719         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT)) {
4720                 rc = -EOPNOTSUPP;
4721                 goto out;
4722         }
4723 
4724         if (copy_from_user(&oat_data, udata,
4725             sizeof(struct qeth_query_oat_data))) {
4726                         rc = -EFAULT;
4727                         goto out;
4728         }
4729 
4730         priv.buffer_len = oat_data.buffer_len;
4731         priv.response_len = 0;
4732         priv.buffer =  kzalloc(oat_data.buffer_len, GFP_KERNEL);
4733         if (!priv.buffer) {
4734                 rc = -ENOMEM;
4735                 goto out;
4736         }
4737 
4738         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4739                                    sizeof(struct qeth_ipacmd_setadpparms_hdr) +
4740                                    sizeof(struct qeth_query_oat));
4741         if (!iob) {
4742                 rc = -ENOMEM;
4743                 goto out_free;
4744         }
4745         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
4746         oat_req = &cmd->data.setadapterparms.data.query_oat;
4747         oat_req->subcmd_code = oat_data.command;
4748 
4749         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb,
4750                                &priv);
4751         if (!rc) {
4752                 if (is_compat_task())
4753                         tmp = compat_ptr(oat_data.ptr);
4754                 else
4755                         tmp = (void __user *)(unsigned long)oat_data.ptr;
4756 
4757                 if (copy_to_user(tmp, priv.buffer,
4758                     priv.response_len)) {
4759                         rc = -EFAULT;
4760                         goto out_free;
4761                 }
4762 
4763                 oat_data.response_len = priv.response_len;
4764 
4765                 if (copy_to_user(udata, &oat_data,
4766                     sizeof(struct qeth_query_oat_data)))
4767                         rc = -EFAULT;
4768         } else
4769                 if (rc == IPA_RC_FFFF)
4770                         rc = -EFAULT;
4771 
4772 out_free:
4773         kfree(priv.buffer);
4774 out:
4775         return rc;
4776 }
4777 EXPORT_SYMBOL_GPL(qeth_query_oat_command);
4778 
4779 static int qeth_query_card_info_cb(struct qeth_card *card,
4780                                    struct qeth_reply *reply, unsigned long data)
4781 {
4782         struct qeth_ipa_cmd *cmd;
4783         struct qeth_query_card_info *card_info;
4784         struct carrier_info *carrier_info;
4785 
4786         QETH_CARD_TEXT(card, 2, "qcrdincb");
4787         carrier_info = (struct carrier_info *)reply->param;
4788         cmd = (struct qeth_ipa_cmd *)data;
4789         card_info = &cmd->data.setadapterparms.data.card_info;
4790         if (cmd->data.setadapterparms.hdr.return_code == 0) {
4791                 carrier_info->card_type = card_info->card_type;
4792                 carrier_info->port_mode = card_info->port_mode;
4793                 carrier_info->port_speed = card_info->port_speed;
4794         }
4795 
4796         qeth_default_setadapterparms_cb(card, reply, (unsigned long) cmd);
4797         return 0;
4798 }
4799 
4800 static int qeth_query_card_info(struct qeth_card *card,
4801                                 struct carrier_info *carrier_info)
4802 {
4803         struct qeth_cmd_buffer *iob;
4804 
4805         QETH_CARD_TEXT(card, 2, "qcrdinfo");
4806         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_CARD_INFO))
4807                 return -EOPNOTSUPP;
4808         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_CARD_INFO,
4809                 sizeof(struct qeth_ipacmd_setadpparms_hdr));
4810         if (!iob)
4811                 return -ENOMEM;
4812         return qeth_send_ipa_cmd(card, iob, qeth_query_card_info_cb,
4813                                         (void *)carrier_info);
4814 }
4815 
4816 static inline int qeth_get_qdio_q_format(struct qeth_card *card)
4817 {
4818         switch (card->info.type) {
4819         case QETH_CARD_TYPE_IQD:
4820                 return 2;
4821         default:
4822                 return 0;
4823         }
4824 }
4825 
4826 static void qeth_determine_capabilities(struct qeth_card *card)
4827 {
4828         int rc;
4829         int length;
4830         char *prcd;
4831         struct ccw_device *ddev;
4832         int ddev_offline = 0;
4833 
4834         QETH_DBF_TEXT(SETUP, 2, "detcapab");
4835         ddev = CARD_DDEV(card);
4836         if (!ddev->online) {
4837                 ddev_offline = 1;
4838                 rc = ccw_device_set_online(ddev);
4839                 if (rc) {
4840                         QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
4841                         goto out;
4842                 }
4843         }
4844 
4845         rc = qeth_read_conf_data(card, (void **) &prcd, &length);
4846         if (rc) {
4847                 QETH_DBF_MESSAGE(2, "%s qeth_read_conf_data returned %i\n",
4848                         dev_name(&card->gdev->dev), rc);
4849                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
4850                 goto out_offline;
4851         }
4852         qeth_configure_unitaddr(card, prcd);
4853         if (ddev_offline)
4854                 qeth_configure_blkt_default(card, prcd);
4855         kfree(prcd);
4856 
4857         rc = qdio_get_ssqd_desc(ddev, &card->ssqd);
4858         if (rc)
4859                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
4860 
4861         QETH_DBF_TEXT_(SETUP, 2, "qfmt%d", card->ssqd.qfmt);
4862         QETH_DBF_TEXT_(SETUP, 2, "%d", card->ssqd.qdioac1);
4863         QETH_DBF_TEXT_(SETUP, 2, "%d", card->ssqd.qdioac3);
4864         QETH_DBF_TEXT_(SETUP, 2, "icnt%d", card->ssqd.icnt);
4865         if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) ||
4866             ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) ||
4867             ((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) {
4868                 dev_info(&card->gdev->dev,
4869                         "Completion Queueing supported\n");
4870         } else {
4871                 card->options.cq = QETH_CQ_NOTAVAILABLE;
4872         }
4873 
4874 
4875 out_offline:
4876         if (ddev_offline == 1)
4877                 ccw_device_set_offline(ddev);
4878 out:
4879         return;
4880 }
4881 
4882 static inline void qeth_qdio_establish_cq(struct qeth_card *card,
4883         struct qdio_buffer **in_sbal_ptrs,
4884         void (**queue_start_poll) (struct ccw_device *, int, unsigned long)) {
4885         int i;
4886 
4887         if (card->options.cq == QETH_CQ_ENABLED) {
4888                 int offset = QDIO_MAX_BUFFERS_PER_Q *
4889                              (card->qdio.no_in_queues - 1);
4890                 i = QDIO_MAX_BUFFERS_PER_Q * (card->qdio.no_in_queues - 1);
4891                 for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i) {
4892                         in_sbal_ptrs[offset + i] = (struct qdio_buffer *)
4893                                 virt_to_phys(card->qdio.c_q->bufs[i].buffer);
4894                 }
4895 
4896                 queue_start_poll[card->qdio.no_in_queues - 1] = NULL;
4897         }
4898 }
4899 
4900 static int qeth_qdio_establish(struct qeth_card *card)
4901 {
4902         struct qdio_initialize init_data;
4903         char *qib_param_field;
4904         struct qdio_buffer **in_sbal_ptrs;
4905         void (**queue_start_poll) (struct ccw_device *, int, unsigned long);
4906         struct qdio_buffer **out_sbal_ptrs;
4907         int i, j, k;
4908         int rc = 0;
4909 
4910         QETH_DBF_TEXT(SETUP, 2, "qdioest");
4911 
4912         qib_param_field = kzalloc(QDIO_MAX_BUFFERS_PER_Q * sizeof(char),
4913                               GFP_KERNEL);
4914         if (!qib_param_field) {
4915                 rc =  -ENOMEM;
4916                 goto out_free_nothing;
4917         }
4918 
4919         qeth_create_qib_param_field(card, qib_param_field);
4920         qeth_create_qib_param_field_blkt(card, qib_param_field);
4921 
4922         in_sbal_ptrs = kzalloc(card->qdio.no_in_queues *
4923                                QDIO_MAX_BUFFERS_PER_Q * sizeof(void *),
4924                                GFP_KERNEL);
4925         if (!in_sbal_ptrs) {
4926                 rc = -ENOMEM;
4927                 goto out_free_qib_param;
4928         }
4929         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i) {
4930                 in_sbal_ptrs[i] = (struct qdio_buffer *)
4931                         virt_to_phys(card->qdio.in_q->bufs[i].buffer);
4932         }
4933 
4934         queue_start_poll = kzalloc(sizeof(void *) * card->qdio.no_in_queues,
4935                                    GFP_KERNEL);
4936         if (!queue_start_poll) {
4937                 rc = -ENOMEM;
4938                 goto out_free_in_sbals;
4939         }
4940         for (i = 0; i < card->qdio.no_in_queues; ++i)
4941                 queue_start_poll[i] = card->discipline->start_poll;
4942 
4943         qeth_qdio_establish_cq(card, in_sbal_ptrs, queue_start_poll);
4944 
4945         out_sbal_ptrs =
4946                 kzalloc(card->qdio.no_out_queues * QDIO_MAX_BUFFERS_PER_Q *
4947                         sizeof(void *), GFP_KERNEL);
4948         if (!out_sbal_ptrs) {
4949                 rc = -ENOMEM;
4950                 goto out_free_queue_start_poll;
4951         }
4952         for (i = 0, k = 0; i < card->qdio.no_out_queues; ++i)
4953                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j, ++k) {
4954                         out_sbal_ptrs[k] = (struct qdio_buffer *)virt_to_phys(
4955                                 card->qdio.out_qs[i]->bufs[j]->buffer);
4956                 }
4957 
4958         memset(&init_data, 0, sizeof(struct qdio_initialize));
4959         init_data.cdev                   = CARD_DDEV(card);
4960         init_data.q_format               = qeth_get_qdio_q_format(card);
4961         init_data.qib_param_field_format = 0;
4962         init_data.qib_param_field        = qib_param_field;
4963         init_data.no_input_qs            = card->qdio.no_in_queues;
4964         init_data.no_output_qs           = card->qdio.no_out_queues;
4965         init_data.input_handler          = card->discipline->input_handler;
4966         init_data.output_handler         = card->discipline->output_handler;
4967         init_data.queue_start_poll_array = queue_start_poll;
4968         init_data.int_parm               = (unsigned long) card;
4969         init_data.input_sbal_addr_array  = (void **) in_sbal_ptrs;
4970         init_data.output_sbal_addr_array = (void **) out_sbal_ptrs;
4971         init_data.output_sbal_state_array = card->qdio.out_bufstates;
4972         init_data.scan_threshold =
4973                 (card->info.type == QETH_CARD_TYPE_IQD) ? 1 : 32;
4974 
4975         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED,
4976                 QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) {
4977                 rc = qdio_allocate(&init_data);
4978                 if (rc) {
4979                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
4980                         goto out;
4981                 }
4982                 rc = qdio_establish(&init_data);
4983                 if (rc) {
4984                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
4985                         qdio_free(CARD_DDEV(card));
4986                 }
4987         }
4988 
4989         switch (card->options.cq) {
4990         case QETH_CQ_ENABLED:
4991                 dev_info(&card->gdev->dev, "Completion Queue support enabled");
4992                 break;
4993         case QETH_CQ_DISABLED:
4994                 dev_info(&card->gdev->dev, "Completion Queue support disabled");
4995                 break;
4996         default:
4997                 break;
4998         }
4999 out:
5000         kfree(out_sbal_ptrs);
5001 out_free_queue_start_poll:
5002         kfree(queue_start_poll);
5003 out_free_in_sbals:
5004         kfree(in_sbal_ptrs);
5005 out_free_qib_param:
5006         kfree(qib_param_field);
5007 out_free_nothing:
5008         return rc;
5009 }
5010 
5011 static void qeth_core_free_card(struct qeth_card *card)
5012 {
5013 
5014         QETH_DBF_TEXT(SETUP, 2, "freecrd");
5015         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
5016         qeth_clean_channel(&card->read);
5017         qeth_clean_channel(&card->write);
5018         if (card->dev)
5019                 free_netdev(card->dev);
5020         kfree(card->ip_tbd_list);
5021         qeth_free_qdio_buffers(card);
5022         unregister_service_level(&card->qeth_service_level);
5023         kfree(card);
5024 }
5025 
5026 void qeth_trace_features(struct qeth_card *card)
5027 {
5028         QETH_CARD_TEXT(card, 2, "features");
5029         QETH_CARD_TEXT_(card, 2, "%x", card->options.ipa4.supported_funcs);
5030         QETH_CARD_TEXT_(card, 2, "%x", card->options.ipa4.enabled_funcs);
5031         QETH_CARD_TEXT_(card, 2, "%x", card->options.ipa6.supported_funcs);
5032         QETH_CARD_TEXT_(card, 2, "%x", card->options.ipa6.enabled_funcs);
5033         QETH_CARD_TEXT_(card, 2, "%x", card->options.adp.supported_funcs);
5034         QETH_CARD_TEXT_(card, 2, "%x", card->options.adp.enabled_funcs);
5035         QETH_CARD_TEXT_(card, 2, "%x", card->info.diagass_support);
5036 }
5037 EXPORT_SYMBOL_GPL(qeth_trace_features);
5038 
5039 static struct ccw_device_id qeth_ids[] = {
5040         {CCW_DEVICE_DEVTYPE(0x1731, 0x01, 0x1732, 0x01),
5041                                         .driver_info = QETH_CARD_TYPE_OSD},
5042         {CCW_DEVICE_DEVTYPE(0x1731, 0x05, 0x1732, 0x05),
5043                                         .driver_info = QETH_CARD_TYPE_IQD},
5044         {CCW_DEVICE_DEVTYPE(0x1731, 0x06, 0x1732, 0x06),
5045                                         .driver_info = QETH_CARD_TYPE_OSN},
5046         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x03),
5047                                         .driver_info = QETH_CARD_TYPE_OSM},
5048         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02),
5049                                         .driver_info = QETH_CARD_TYPE_OSX},
5050         {},
5051 };
5052 MODULE_DEVICE_TABLE(ccw, qeth_ids);
5053 
5054 static struct ccw_driver qeth_ccw_driver = {
5055         .driver = {
5056                 .owner = THIS_MODULE,
5057                 .name = "qeth",
5058         },
5059         .ids = qeth_ids,
5060         .probe = ccwgroup_probe_ccwdev,
5061         .remove = ccwgroup_remove_ccwdev,
5062 };
5063 
5064 int qeth_core_hardsetup_card(struct qeth_card *card)
5065 {
5066         int retries = 3;
5067         int rc;
5068 
5069         QETH_DBF_TEXT(SETUP, 2, "hrdsetup");
5070         atomic_set(&card->force_alloc_skb, 0);
5071         qeth_update_from_chp_desc(card);
5072 retry:
5073         if (retries < 3)
5074                 QETH_DBF_MESSAGE(2, "%s Retrying to do IDX activates.\n",
5075                         dev_name(&card->gdev->dev));
5076         rc = qeth_qdio_clear_card(card, card->info.type != QETH_CARD_TYPE_IQD);
5077         ccw_device_set_offline(CARD_DDEV(card));
5078         ccw_device_set_offline(CARD_WDEV(card));
5079         ccw_device_set_offline(CARD_RDEV(card));
5080         qdio_free(CARD_DDEV(card));
5081         rc = ccw_device_set_online(CARD_RDEV(card));
5082         if (rc)
5083                 goto retriable;
5084         rc = ccw_device_set_online(CARD_WDEV(card));
5085         if (rc)
5086                 goto retriable;
5087         rc = ccw_device_set_online(CARD_DDEV(card));
5088         if (rc)
5089                 goto retriable;
5090 retriable:
5091         if (rc == -ERESTARTSYS) {
5092                 QETH_DBF_TEXT(SETUP, 2, "break1");
5093                 return rc;
5094         } else if (rc) {
5095                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
5096                 if (--retries < 0)
5097                         goto out;
5098                 else
5099                         goto retry;
5100         }
5101         qeth_determine_capabilities(card);
5102         qeth_init_tokens(card);
5103         qeth_init_func_level(card);
5104         rc = qeth_idx_activate_channel(&card->read, qeth_idx_read_cb);
5105         if (rc == -ERESTARTSYS) {
5106                 QETH_DBF_TEXT(SETUP, 2, "break2");
5107                 return rc;
5108         } else if (rc) {
5109                 QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
5110                 if (--retries < 0)
5111                         goto out;
5112                 else
5113                         goto retry;
5114         }
5115         rc = qeth_idx_activate_channel(&card->write, qeth_idx_write_cb);
5116         if (rc == -ERESTARTSYS) {
5117                 QETH_DBF_TEXT(SETUP, 2, "break3");
5118                 return rc;
5119         } else if (rc) {
5120                 QETH_DBF_TEXT_(SETUP, 2, "4err%d", rc);
5121                 if (--retries < 0)
5122                         goto out;
5123                 else
5124                         goto retry;
5125         }
5126         card->read_or_write_problem = 0;
5127         rc = qeth_mpc_initialize(card);
5128         if (rc) {
5129                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
5130                 goto out;
5131         }
5132 
5133         card->options.ipa4.supported_funcs = 0;
5134         card->options.adp.supported_funcs = 0;
5135         card->options.sbp.supported_funcs = 0;
5136         card->info.diagass_support = 0;
5137         rc = qeth_query_ipassists(card, QETH_PROT_IPV4);
5138         if (rc == -ENOMEM)
5139                 goto out;
5140         if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
5141                 rc = qeth_query_setadapterparms(card);
5142                 if (rc < 0) {
5143                         QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
5144                         goto out;
5145                 }
5146         }
5147         if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
5148                 rc = qeth_query_setdiagass(card);
5149                 if (rc < 0) {
5150                         QETH_DBF_TEXT_(SETUP, 2, "7err%d", rc);
5151                         goto out;
5152                 }
5153         }
5154         return 0;
5155 out:
5156         dev_warn(&card->gdev->dev, "The qeth device driver failed to recover "
5157                 "an error on the device\n");
5158         QETH_DBF_MESSAGE(2, "%s Initialization in hardsetup failed! rc=%d\n",
5159                 dev_name(&card->gdev->dev), rc);
5160         return rc;
5161 }
5162 EXPORT_SYMBOL_GPL(qeth_core_hardsetup_card);
5163 
5164 static inline int qeth_create_skb_frag(struct qeth_qdio_buffer *qethbuffer,
5165                 struct qdio_buffer_element *element,
5166                 struct sk_buff **pskb, int offset, int *pfrag, int data_len)
5167 {
5168         struct page *page = virt_to_page(element->addr);
5169         if (*pskb == NULL) {
5170                 if (qethbuffer->rx_skb) {
5171                         /* only if qeth_card.options.cq == QETH_CQ_ENABLED */
5172                         *pskb = qethbuffer->rx_skb;
5173                         qethbuffer->rx_skb = NULL;
5174                 } else {
5175                         *pskb = dev_alloc_skb(QETH_RX_PULL_LEN + ETH_HLEN);
5176                         if (!(*pskb))
5177                                 return -ENOMEM;
5178                 }
5179 
5180                 skb_reserve(*pskb, ETH_HLEN);
5181                 if (data_len <= QETH_RX_PULL_LEN) {
5182                         memcpy(skb_put(*pskb, data_len), element->addr + offset,
5183                                 data_len);
5184                 } else {
5185                         get_page(page);
5186                         memcpy(skb_put(*pskb, QETH_RX_PULL_LEN),
5187                                element->addr + offset, QETH_RX_PULL_LEN);
5188                         skb_fill_page_desc(*pskb, *pfrag, page,
5189                                 offset + QETH_RX_PULL_LEN,
5190                                 data_len - QETH_RX_PULL_LEN);
5191                         (*pskb)->data_len += data_len - QETH_RX_PULL_LEN;
5192                         (*pskb)->len      += data_len - QETH_RX_PULL_LEN;
5193                         (*pskb)->truesize += data_len - QETH_RX_PULL_LEN;
5194                         (*pfrag)++;
5195                 }
5196         } else {
5197                 get_page(page);
5198                 skb_fill_page_desc(*pskb, *pfrag, page, offset, data_len);
5199                 (*pskb)->data_len += data_len;
5200                 (*pskb)->len      += data_len;
5201                 (*pskb)->truesize += data_len;
5202                 (*pfrag)++;
5203         }
5204 
5205 
5206         return 0;
5207 }
5208 
5209 static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale)
5210 {
5211         return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY);
5212 }
5213 
5214 struct sk_buff *qeth_core_get_next_skb(struct qeth_card *card,
5215                 struct qeth_qdio_buffer *qethbuffer,
5216                 struct qdio_buffer_element **__element, int *__offset,
5217                 struct qeth_hdr **hdr)
5218 {
5219         struct qdio_buffer_element *element = *__element;
5220         struct qdio_buffer *buffer = qethbuffer->buffer;
5221         int offset = *__offset;
5222         struct sk_buff *skb = NULL;
5223         int skb_len = 0;
5224         void *data_ptr;
5225         int data_len;
5226         int headroom = 0;
5227         int use_rx_sg = 0;
5228         int frag = 0;
5229 
5230         /* qeth_hdr must not cross element boundaries */
5231         if (element->length < offset + sizeof(struct qeth_hdr)) {
5232                 if (qeth_is_last_sbale(element))
5233                         return NULL;
5234                 element++;
5235                 offset = 0;
5236                 if (element->length < sizeof(struct qeth_hdr))
5237                         return NULL;
5238         }
5239         *hdr = element->addr + offset;
5240 
5241         offset += sizeof(struct qeth_hdr);
5242         switch ((*hdr)->hdr.l2.id) {
5243         case QETH_HEADER_TYPE_LAYER2:
5244                 skb_len = (*hdr)->hdr.l2.pkt_length;
5245                 break;
5246         case QETH_HEADER_TYPE_LAYER3:
5247                 skb_len = (*hdr)->hdr.l3.length;
5248                 headroom = ETH_HLEN;
5249                 break;
5250         case QETH_HEADER_TYPE_OSN:
5251                 skb_len = (*hdr)->hdr.osn.pdu_length;
5252                 headroom = sizeof(struct qeth_hdr);
5253                 break;
5254         default:
5255                 break;
5256         }
5257 
5258         if (!skb_len)
5259                 return NULL;
5260 
5261         if (((skb_len >= card->options.rx_sg_cb) &&
5262              (!(card->info.type == QETH_CARD_TYPE_OSN)) &&
5263              (!atomic_read(&card->force_alloc_skb))) ||
5264             (card->options.cq == QETH_CQ_ENABLED)) {
5265                 use_rx_sg = 1;
5266         } else {
5267                 skb = dev_alloc_skb(skb_len + headroom);
5268                 if (!skb)
5269                         goto no_mem;
5270                 if (headroom)
5271                         skb_reserve(skb, headroom);
5272         }
5273 
5274         data_ptr = element->addr + offset;
5275         while (skb_len) {
5276                 data_len = min(skb_len, (int)(element->length - offset));
5277                 if (data_len) {
5278                         if (use_rx_sg) {
5279                                 if (qeth_create_skb_frag(qethbuffer, element,
5280                                     &skb, offset, &frag, data_len))
5281                                         goto no_mem;
5282                         } else {
5283                                 memcpy(skb_put(skb, data_len), data_ptr,
5284                                         data_len);
5285                         }
5286                 }
5287                 skb_len -= data_len;
5288                 if (skb_len) {
5289                         if (qeth_is_last_sbale(element)) {
5290                                 QETH_CARD_TEXT(card, 4, "unexeob");
5291                                 QETH_CARD_HEX(card, 2, buffer, sizeof(void *));
5292                                 dev_kfree_skb_any(skb);
5293                                 card->stats.rx_errors++;
5294                                 return NULL;
5295                         }
5296                         element++;
5297                         offset = 0;
5298                         data_ptr = element->addr;
5299                 } else {
5300                         offset += data_len;
5301                 }
5302         }
5303         *__element = element;
5304         *__offset = offset;
5305         if (use_rx_sg && card->options.performance_stats) {
5306                 card->perf_stats.sg_skbs_rx++;
5307                 card->perf_stats.sg_frags_rx += skb_shinfo(skb)->nr_frags;
5308         }
5309         return skb;
5310 no_mem:
5311         if (net_ratelimit()) {
5312                 QETH_CARD_TEXT(card, 2, "noskbmem");
5313         }
5314         card->stats.rx_dropped++;
5315         return NULL;
5316 }
5317 EXPORT_SYMBOL_GPL(qeth_core_get_next_skb);
5318 
5319 static void qeth_unregister_dbf_views(void)
5320 {
5321         int x;
5322         for (x = 0; x < QETH_DBF_INFOS; x++) {
5323                 debug_unregister(qeth_dbf[x].id);
5324                 qeth_dbf[x].id = NULL;
5325         }
5326 }
5327 
5328 void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...)
5329 {
5330         char dbf_txt_buf[32];
5331         va_list args;
5332 
5333         if (!debug_level_enabled(id, level))
5334                 return;
5335         va_start(args, fmt);
5336         vsnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
5337         va_end(args);
5338         debug_text_event(id, level, dbf_txt_buf);
5339 }
5340 EXPORT_SYMBOL_GPL(qeth_dbf_longtext);
5341 
5342 static int qeth_register_dbf_views(void)
5343 {
5344         int ret;
5345         int x;
5346 
5347         for (x = 0; x < QETH_DBF_INFOS; x++) {
5348                 /* register the areas */
5349                 qeth_dbf[x].id = debug_register(qeth_dbf[x].name,
5350                                                 qeth_dbf[x].pages,
5351                                                 qeth_dbf[x].areas,
5352                                                 qeth_dbf[x].len);
5353                 if (qeth_dbf[x].id == NULL) {
5354                         qeth_unregister_dbf_views();
5355                         return -ENOMEM;
5356                 }
5357 
5358                 /* register a view */
5359                 ret = debug_register_view(qeth_dbf[x].id, qeth_dbf[x].view);
5360                 if (ret) {
5361                         qeth_unregister_dbf_views();
5362                         return ret;
5363                 }
5364 
5365                 /* set a passing level */
5366                 debug_set_level(qeth_dbf[x].id, qeth_dbf[x].level);
5367         }
5368 
5369         return 0;
5370 }
5371 
5372 int qeth_core_load_discipline(struct qeth_card *card,
5373                 enum qeth_discipline_id discipline)
5374 {
5375         int rc = 0;
5376         mutex_lock(&qeth_mod_mutex);
5377         switch (discipline) {
5378         case QETH_DISCIPLINE_LAYER3:
5379                 card->discipline = try_then_request_module(
5380                         symbol_get(qeth_l3_discipline), "qeth_l3");
5381                 break;
5382         case QETH_DISCIPLINE_LAYER2:
5383                 card->discipline = try_then_request_module(
5384                         symbol_get(qeth_l2_discipline), "qeth_l2");
5385                 break;
5386         }
5387         if (!card->discipline) {
5388                 dev_err(&card->gdev->dev, "There is no kernel module to "
5389                         "support discipline %d\n", discipline);
5390                 rc = -EINVAL;
5391         }
5392         mutex_unlock(&qeth_mod_mutex);
5393         return rc;
5394 }
5395 
5396 void qeth_core_free_discipline(struct qeth_card *card)
5397 {
5398         if (card->options.layer2)
5399                 symbol_put(qeth_l2_discipline);
5400         else
5401                 symbol_put(qeth_l3_discipline);
5402         card->discipline = NULL;
5403 }
5404 
5405 static const struct device_type qeth_generic_devtype = {
5406         .name = "qeth_generic",
5407         .groups = qeth_generic_attr_groups,
5408 };
5409 static const struct device_type qeth_osn_devtype = {
5410         .name = "qeth_osn",
5411         .groups = qeth_osn_attr_groups,
5412 };
5413 
5414 #define DBF_NAME_LEN    20
5415 
5416 struct qeth_dbf_entry {
5417         char dbf_name[DBF_NAME_LEN];
5418         debug_info_t *dbf_info;
5419         struct list_head dbf_list;
5420 };
5421 
5422 static LIST_HEAD(qeth_dbf_list);
5423 static DEFINE_MUTEX(qeth_dbf_list_mutex);
5424 
5425 static debug_info_t *qeth_get_dbf_entry(char *name)
5426 {
5427         struct qeth_dbf_entry *entry;
5428         debug_info_t *rc = NULL;
5429 
5430         mutex_lock(&qeth_dbf_list_mutex);
5431         list_for_each_entry(entry, &qeth_dbf_list, dbf_list) {
5432                 if (strcmp(entry->dbf_name, name) == 0) {
5433                         rc = entry->dbf_info;
5434                         break;
5435                 }
5436         }
5437         mutex_unlock(&qeth_dbf_list_mutex);
5438         return rc;
5439 }
5440 
5441 static int qeth_add_dbf_entry(struct qeth_card *card, char *name)
5442 {
5443         struct qeth_dbf_entry *new_entry;
5444 
5445         card->debug = debug_register(name, 2, 1, 8);
5446         if (!card->debug) {
5447                 QETH_DBF_TEXT_(SETUP, 2, "%s", "qcdbf");
5448                 goto err;
5449         }
5450         if (debug_register_view(card->debug, &debug_hex_ascii_view))
5451                 goto err_dbg;
5452         new_entry = kzalloc(sizeof(struct qeth_dbf_entry), GFP_KERNEL);
5453         if (!new_entry)
5454                 goto err_dbg;
5455         strncpy(new_entry->dbf_name, name, DBF_NAME_LEN);
5456         new_entry->dbf_info = card->debug;
5457         mutex_lock(&qeth_dbf_list_mutex);
5458         list_add(&new_entry->dbf_list, &qeth_dbf_list);
5459         mutex_unlock(&qeth_dbf_list_mutex);
5460 
5461         return 0;
5462 
5463 err_dbg:
5464         debug_unregister(card->debug);
5465 err:
5466         return -ENOMEM;
5467 }
5468 
5469 static void qeth_clear_dbf_list(void)
5470 {
5471         struct qeth_dbf_entry *entry, *tmp;
5472 
5473         mutex_lock(&qeth_dbf_list_mutex);
5474         list_for_each_entry_safe(entry, tmp, &qeth_dbf_list, dbf_list) {
5475                 list_del(&entry->dbf_list);
5476                 debug_unregister(entry->dbf_info);
5477                 kfree(entry);
5478         }
5479         mutex_unlock(&qeth_dbf_list_mutex);
5480 }
5481 
5482 static int qeth_core_probe_device(struct ccwgroup_device *gdev)
5483 {
5484         struct qeth_card *card;
5485         struct device *dev;
5486         int rc;
5487         unsigned long flags;
5488         char dbf_name[DBF_NAME_LEN];
5489 
5490         QETH_DBF_TEXT(SETUP, 2, "probedev");
5491 
5492         dev = &gdev->dev;
5493         if (!get_device(dev))
5494                 return -ENODEV;
5495 
5496         QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev));
5497 
5498         card = qeth_alloc_card();
5499         if (!card) {
5500                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM);
5501                 rc = -ENOMEM;
5502                 goto err_dev;
5503         }
5504 
5505         snprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
5506                 dev_name(&gdev->dev));
5507         card->debug = qeth_get_dbf_entry(dbf_name);
5508         if (!card->debug) {
5509                 rc = qeth_add_dbf_entry(card, dbf_name);
5510                 if (rc)
5511                         goto err_card;
5512         }
5513 
5514         card->read.ccwdev  = gdev->cdev[0];
5515         card->write.ccwdev = gdev->cdev[1];
5516         card->data.ccwdev  = gdev->cdev[2];
5517         dev_set_drvdata(&gdev->dev, card);
5518         card->gdev = gdev;
5519         gdev->cdev[0]->handler = qeth_irq;
5520         gdev->cdev[1]->handler = qeth_irq;
5521         gdev->cdev[2]->handler = qeth_irq;
5522 
5523         rc = qeth_determine_card_type(card);
5524         if (rc) {
5525                 QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
5526                 goto err_card;
5527         }
5528         rc = qeth_setup_card(card);
5529         if (rc) {
5530                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
5531                 goto err_card;
5532         }
5533 
5534         if (card->info.type == QETH_CARD_TYPE_OSN)
5535                 gdev->dev.type = &qeth_osn_devtype;
5536         else
5537                 gdev->dev.type = &qeth_generic_devtype;
5538 
5539         switch (card->info.type) {
5540         case QETH_CARD_TYPE_OSN:
5541         case QETH_CARD_TYPE_OSM:
5542                 rc = qeth_core_load_discipline(card, QETH_DISCIPLINE_LAYER2);
5543                 if (rc)
5544                         goto err_card;
5545                 rc = card->discipline->setup(card->gdev);
5546                 if (rc)
5547                         goto err_disc;
5548         case QETH_CARD_TYPE_OSD:
5549         case QETH_CARD_TYPE_OSX:
5550         default:
5551                 break;
5552         }
5553 
5554         write_lock_irqsave(&qeth_core_card_list.rwlock, flags);
5555         list_add_tail(&card->list, &qeth_core_card_list.list);
5556         write_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
5557 
5558         qeth_determine_capabilities(card);
5559         return 0;
5560 
5561 err_disc:
5562         qeth_core_free_discipline(card);
5563 err_card:
5564         qeth_core_free_card(card);
5565 err_dev:
5566         put_device(dev);
5567         return rc;
5568 }
5569 
5570 static void qeth_core_remove_device(struct ccwgroup_device *gdev)
5571 {
5572         unsigned long flags;
5573         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5574 
5575         QETH_DBF_TEXT(SETUP, 2, "removedv");
5576 
5577         if (card->discipline) {
5578                 card->discipline->remove(gdev);
5579                 qeth_core_free_discipline(card);
5580         }
5581 
5582         write_lock_irqsave(&qeth_core_card_list.rwlock, flags);
5583         list_del(&card->list);
5584         write_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
5585         qeth_core_free_card(card);
5586         dev_set_drvdata(&gdev->dev, NULL);
5587         put_device(&gdev->dev);
5588         return;
5589 }
5590 
5591 static int qeth_core_set_online(struct ccwgroup_device *gdev)
5592 {
5593         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5594         int rc = 0;
5595         int def_discipline;
5596 
5597         if (!card->discipline) {
5598                 if (card->info.type == QETH_CARD_TYPE_IQD)
5599                         def_discipline = QETH_DISCIPLINE_LAYER3;
5600                 else
5601                         def_discipline = QETH_DISCIPLINE_LAYER2;
5602                 rc = qeth_core_load_discipline(card, def_discipline);
5603                 if (rc)
5604                         goto err;
5605                 rc = card->discipline->setup(card->gdev);
5606                 if (rc)
5607                         goto err;
5608         }
5609         rc = card->discipline->set_online(gdev);
5610 err:
5611         return rc;
5612 }
5613 
5614 static int qeth_core_set_offline(struct ccwgroup_device *gdev)
5615 {
5616         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5617         return card->discipline->set_offline(gdev);
5618 }
5619 
5620 static void qeth_core_shutdown(struct ccwgroup_device *gdev)
5621 {
5622         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5623         if (card->discipline && card->discipline->shutdown)
5624                 card->discipline->shutdown(gdev);
5625 }
5626 
5627 static int qeth_core_prepare(struct ccwgroup_device *gdev)
5628 {
5629         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5630         if (card->discipline && card->discipline->prepare)
5631                 return card->discipline->prepare(gdev);
5632         return 0;
5633 }
5634 
5635 static void qeth_core_complete(struct ccwgroup_device *gdev)
5636 {
5637         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5638         if (card->discipline && card->discipline->complete)
5639                 card->discipline->complete(gdev);
5640 }
5641 
5642 static int qeth_core_freeze(struct ccwgroup_device *gdev)
5643 {
5644         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5645         if (card->discipline && card->discipline->freeze)
5646                 return card->discipline->freeze(gdev);
5647         return 0;
5648 }
5649 
5650 static int qeth_core_thaw(struct ccwgroup_device *gdev)
5651 {
5652         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5653         if (card->discipline && card->discipline->thaw)
5654                 return card->discipline->thaw(gdev);
5655         return 0;
5656 }
5657 
5658 static int qeth_core_restore(struct ccwgroup_device *gdev)
5659 {
5660         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5661         if (card->discipline && card->discipline->restore)
5662                 return card->discipline->restore(gdev);
5663         return 0;
5664 }
5665 
5666 static struct ccwgroup_driver qeth_core_ccwgroup_driver = {
5667         .driver = {
5668                 .owner = THIS_MODULE,
5669                 .name = "qeth",
5670         },
5671         .setup = qeth_core_probe_device,
5672         .remove = qeth_core_remove_device,
5673         .set_online = qeth_core_set_online,
5674         .set_offline = qeth_core_set_offline,
5675         .shutdown = qeth_core_shutdown,
5676         .prepare = qeth_core_prepare,
5677         .complete = qeth_core_complete,
5678         .freeze = qeth_core_freeze,
5679         .thaw = qeth_core_thaw,
5680         .restore = qeth_core_restore,
5681 };
5682 
5683 static ssize_t qeth_core_driver_group_store(struct device_driver *ddrv,
5684                                             const char *buf, size_t count)
5685 {
5686         int err;
5687 
5688         err = ccwgroup_create_dev(qeth_core_root_dev,
5689                                   &qeth_core_ccwgroup_driver, 3, buf);
5690 
5691         return err ? err : count;
5692 }
5693 static DRIVER_ATTR(group, 0200, NULL, qeth_core_driver_group_store);
5694 
5695 static struct attribute *qeth_drv_attrs[] = {
5696         &driver_attr_group.attr,
5697         NULL,
5698 };
5699 static struct attribute_group qeth_drv_attr_group = {
5700         .attrs = qeth_drv_attrs,
5701 };
5702 static const struct attribute_group *qeth_drv_attr_groups[] = {
5703         &qeth_drv_attr_group,
5704         NULL,
5705 };
5706 
5707 static struct {
5708         const char str[ETH_GSTRING_LEN];
5709 } qeth_ethtool_stats_keys[] = {
5710 /*  0 */{"rx skbs"},
5711         {"rx buffers"},
5712         {"tx skbs"},
5713         {"tx buffers"},
5714         {"tx skbs no packing"},
5715         {"tx buffers no packing"},
5716         {"tx skbs packing"},
5717         {"tx buffers packing"},
5718         {"tx sg skbs"},
5719         {"tx sg frags"},
5720 /* 10 */{"rx sg skbs"},
5721         {"rx sg frags"},
5722         {"rx sg page allocs"},
5723         {"tx large kbytes"},
5724         {"tx large count"},
5725         {"tx pk state ch n->p"},
5726         {"tx pk state ch p->n"},
5727         {"tx pk watermark low"},
5728         {"tx pk watermark high"},
5729         {"queue 0 buffer usage"},
5730 /* 20 */{"queue 1 buffer usage"},
5731         {"queue 2 buffer usage"},
5732         {"queue 3 buffer usage"},
5733         {"rx poll time"},
5734         {"rx poll count"},
5735         {"rx do_QDIO time"},
5736         {"rx do_QDIO count"},
5737         {"tx handler time"},
5738         {"tx handler count"},
5739         {"tx time"},
5740 /* 30 */{"tx count"},
5741         {"tx do_QDIO time"},
5742         {"tx do_QDIO count"},
5743         {"tx csum"},
5744         {"tx lin"},
5745         {"cq handler count"},
5746         {"cq handler time"}
5747 };
5748 
5749 int qeth_core_get_sset_count(struct net_device *dev, int stringset)
5750 {
5751         switch (stringset) {
5752         case ETH_SS_STATS:
5753                 return (sizeof(qeth_ethtool_stats_keys) / ETH_GSTRING_LEN);
5754         default:
5755                 return -EINVAL;
5756         }
5757 }
5758 EXPORT_SYMBOL_GPL(qeth_core_get_sset_count);
5759 
5760 void qeth_core_get_ethtool_stats(struct net_device *dev,
5761                 struct ethtool_stats *stats, u64 *data)
5762 {
5763         struct qeth_card *card = dev->ml_priv;
5764         data[0] = card->stats.rx_packets -
5765                                 card->perf_stats.initial_rx_packets;
5766         data[1] = card->perf_stats.bufs_rec;
5767         data[2] = card->stats.tx_packets -
5768                                 card->perf_stats.initial_tx_packets;
5769         data[3] = card->perf_stats.bufs_sent;
5770         data[4] = card->stats.tx_packets - card->perf_stats.initial_tx_packets
5771                         - card->perf_stats.skbs_sent_pack;
5772         data[5] = card->perf_stats.bufs_sent - card->perf_stats.bufs_sent_pack;
5773         data[6] = card->perf_stats.skbs_sent_pack;
5774         data[7] = card->perf_stats.bufs_sent_pack;
5775         data[8] = card->perf_stats.sg_skbs_sent;
5776         data[9] = card->perf_stats.sg_frags_sent;
5777         data[10] = card->perf_stats.sg_skbs_rx;
5778         data[11] = card->perf_stats.sg_frags_rx;
5779         data[12] = card->perf_stats.sg_alloc_page_rx;
5780         data[13] = (card->perf_stats.large_send_bytes >> 10);
5781         data[14] = card->perf_stats.large_send_cnt;
5782         data[15] = card->perf_stats.sc_dp_p;
5783         data[16] = card->perf_stats.sc_p_dp;
5784         data[17] = QETH_LOW_WATERMARK_PACK;
5785         data[18] = QETH_HIGH_WATERMARK_PACK;
5786         data[19] = atomic_read(&card->qdio.out_qs[0]->used_buffers);
5787         data[20] = (card->qdio.no_out_queues > 1) ?
5788                         atomic_read(&card->qdio.out_qs[1]->used_buffers) : 0;
5789         data[21] = (card->qdio.no_out_queues > 2) ?
5790                         atomic_read(&card->qdio.out_qs[2]->used_buffers) : 0;
5791         data[22] = (card->qdio.no_out_queues > 3) ?
5792                         atomic_read(&card->qdio.out_qs[3]->used_buffers) : 0;
5793         data[23] = card->perf_stats.inbound_time;
5794         data[24] = card->perf_stats.inbound_cnt;
5795         data[25] = card->perf_stats.inbound_do_qdio_time;
5796         data[26] = card->perf_stats.inbound_do_qdio_cnt;
5797         data[27] = card->perf_stats.outbound_handler_time;
5798         data[28] = card->perf_stats.outbound_handler_cnt;
5799         data[29] = card->perf_stats.outbound_time;
5800         data[30] = card->perf_stats.outbound_cnt;
5801         data[31] = card->perf_stats.outbound_do_qdio_time;
5802         data[32] = card->perf_stats.outbound_do_qdio_cnt;
5803         data[33] = card->perf_stats.tx_csum;
5804         data[34] = card->perf_stats.tx_lin;
5805         data[35] = card->perf_stats.cq_cnt;
5806         data[36] = card->perf_stats.cq_time;
5807 }
5808 EXPORT_SYMBOL_GPL(qeth_core_get_ethtool_stats);
5809 
5810 void qeth_core_get_strings(struct net_device *dev, u32 stringset, u8 *data)
5811 {
5812         switch (stringset) {
5813         case ETH_SS_STATS:
5814                 memcpy(data, &qeth_ethtool_stats_keys,
5815                         sizeof(qeth_ethtool_stats_keys));
5816                 break;
5817         default:
5818                 WARN_ON(1);
5819                 break;
5820         }
5821 }
5822 EXPORT_SYMBOL_GPL(qeth_core_get_strings);
5823 
5824 void qeth_core_get_drvinfo(struct net_device *dev,
5825                 struct ethtool_drvinfo *info)
5826 {
5827         struct qeth_card *card = dev->ml_priv;
5828 
5829         strlcpy(info->driver, card->options.layer2 ? "qeth_l2" : "qeth_l3",
5830                 sizeof(info->driver));
5831         strlcpy(info->version, "1.0", sizeof(info->version));
5832         strlcpy(info->fw_version, card->info.mcl_level,
5833                 sizeof(info->fw_version));
5834         snprintf(info->bus_info, sizeof(info->bus_info), "%s/%s/%s",
5835                  CARD_RDEV_ID(card), CARD_WDEV_ID(card), CARD_DDEV_ID(card));
5836 }
5837 EXPORT_SYMBOL_GPL(qeth_core_get_drvinfo);
5838 
5839 /* Helper function to fill 'advertizing' and 'supported' which are the same. */
5840 /* Autoneg and full-duplex are supported and advertized uncondionally.       */
5841 /* Always advertize and support all speeds up to specified, and only one     */
5842 /* specified port type.                                                      */
5843 static void qeth_set_ecmd_adv_sup(struct ethtool_cmd *ecmd,
5844                                 int maxspeed, int porttype)
5845 {
5846         int port_sup, port_adv, spd_sup, spd_adv;
5847 
5848         switch (porttype) {
5849         case PORT_TP:
5850                 port_sup = SUPPORTED_TP;
5851                 port_adv = ADVERTISED_TP;
5852                 break;
5853         case PORT_FIBRE:
5854                 port_sup = SUPPORTED_FIBRE;
5855                 port_adv = ADVERTISED_FIBRE;
5856                 break;
5857         default:
5858                 port_sup = SUPPORTED_TP;
5859                 port_adv = ADVERTISED_TP;
5860                 WARN_ON_ONCE(1);
5861         }
5862 
5863         /* "Fallthrough" case'es ordered from high to low result in setting  */
5864         /* flags cumulatively, starting from the specified speed and down to */
5865         /* the lowest possible.                                              */
5866         spd_sup = 0;
5867         spd_adv = 0;
5868         switch (maxspeed) {
5869         case SPEED_10000:
5870                 spd_sup |= SUPPORTED_10000baseT_Full;
5871                 spd_adv |= ADVERTISED_10000baseT_Full;
5872         case SPEED_1000:
5873                 spd_sup |= SUPPORTED_1000baseT_Half | SUPPORTED_1000baseT_Full;
5874                 spd_adv |= ADVERTISED_1000baseT_Half |
5875                                                 ADVERTISED_1000baseT_Full;
5876         case SPEED_100:
5877                 spd_sup |= SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full;
5878                 spd_adv |= ADVERTISED_100baseT_Half | ADVERTISED_100baseT_Full;
5879         case SPEED_10:
5880                 spd_sup |= SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full;
5881                 spd_adv |= ADVERTISED_10baseT_Half | ADVERTISED_10baseT_Full;
5882         break;
5883         default:
5884                 spd_sup = SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full;
5885                 spd_adv = ADVERTISED_10baseT_Half | ADVERTISED_10baseT_Full;
5886                 WARN_ON_ONCE(1);
5887         }
5888         ecmd->advertising = ADVERTISED_Autoneg | port_adv | spd_adv;
5889         ecmd->supported = SUPPORTED_Autoneg | port_sup | spd_sup;
5890 }
5891 
5892 int qeth_core_ethtool_get_settings(struct net_device *netdev,
5893                                         struct ethtool_cmd *ecmd)
5894 {
5895         struct qeth_card *card = netdev->ml_priv;
5896         enum qeth_link_types link_type;
5897         struct carrier_info carrier_info;
5898         int rc;
5899         u32 speed;
5900 
5901         if ((card->info.type == QETH_CARD_TYPE_IQD) || (card->info.guestlan))
5902                 link_type = QETH_LINK_TYPE_10GBIT_ETH;
5903         else
5904                 link_type = card->info.link_type;
5905 
5906         ecmd->transceiver = XCVR_INTERNAL;
5907         ecmd->duplex = DUPLEX_FULL;
5908         ecmd->autoneg = AUTONEG_ENABLE;
5909 
5910         switch (link_type) {
5911         case QETH_LINK_TYPE_FAST_ETH:
5912         case QETH_LINK_TYPE_LANE_ETH100:
5913                 qeth_set_ecmd_adv_sup(ecmd, SPEED_100, PORT_TP);
5914                 speed = SPEED_100;
5915                 ecmd->port = PORT_TP;
5916                 break;
5917 
5918         case QETH_LINK_TYPE_GBIT_ETH:
5919         case QETH_LINK_TYPE_LANE_ETH1000:
5920                 qeth_set_ecmd_adv_sup(ecmd, SPEED_1000, PORT_FIBRE);
5921                 speed = SPEED_1000;
5922                 ecmd->port = PORT_FIBRE;
5923                 break;
5924 
5925         case QETH_LINK_TYPE_10GBIT_ETH:
5926                 qeth_set_ecmd_adv_sup(ecmd, SPEED_10000, PORT_FIBRE);
5927                 speed = SPEED_10000;
5928                 ecmd->port = PORT_FIBRE;
5929                 break;
5930 
5931         default:
5932                 qeth_set_ecmd_adv_sup(ecmd, SPEED_10, PORT_TP);
5933                 speed = SPEED_10;
5934                 ecmd->port = PORT_TP;
5935         }
5936         ethtool_cmd_speed_set(ecmd, speed);
5937 
5938         /* Check if we can obtain more accurate information.     */
5939         /* If QUERY_CARD_INFO command is not supported or fails, */
5940         /* just return the heuristics that was filled above.     */
5941         if (!qeth_card_hw_is_reachable(card))
5942                 return -ENODEV;
5943         rc = qeth_query_card_info(card, &carrier_info);
5944         if (rc == -EOPNOTSUPP) /* for old hardware, return heuristic */
5945                 return 0;
5946         if (rc) /* report error from the hardware operation */
5947                 return rc;
5948         /* on success, fill in the information got from the hardware */
5949 
5950         netdev_dbg(netdev,
5951         "card info: card_type=0x%02x, port_mode=0x%04x, port_speed=0x%08x\n",
5952                         carrier_info.card_type,
5953                         carrier_info.port_mode,
5954                         carrier_info.port_speed);
5955 
5956         /* Update attributes for which we've obtained more authoritative */
5957         /* information, leave the rest the way they where filled above.  */
5958         switch (carrier_info.card_type) {
5959         case CARD_INFO_TYPE_1G_COPPER_A:
5960         case CARD_INFO_TYPE_1G_COPPER_B:
5961                 qeth_set_ecmd_adv_sup(ecmd, SPEED_1000, PORT_TP);
5962                 ecmd->port = PORT_TP;
5963                 break;
5964         case CARD_INFO_TYPE_1G_FIBRE_A:
5965         case CARD_INFO_TYPE_1G_FIBRE_B:
5966                 qeth_set_ecmd_adv_sup(ecmd, SPEED_1000, PORT_FIBRE);
5967                 ecmd->port = PORT_FIBRE;
5968                 break;
5969         case CARD_INFO_TYPE_10G_FIBRE_A:
5970         case CARD_INFO_TYPE_10G_FIBRE_B:
5971                 qeth_set_ecmd_adv_sup(ecmd, SPEED_10000, PORT_FIBRE);
5972                 ecmd->port = PORT_FIBRE;
5973                 break;
5974         }
5975 
5976         switch (carrier_info.port_mode) {
5977         case CARD_INFO_PORTM_FULLDUPLEX:
5978                 ecmd->duplex = DUPLEX_FULL;
5979                 break;
5980         case CARD_INFO_PORTM_HALFDUPLEX:
5981                 ecmd->duplex = DUPLEX_HALF;
5982                 break;
5983         }
5984 
5985         switch (carrier_info.port_speed) {
5986         case CARD_INFO_PORTS_10M:
5987                 speed = SPEED_10;
5988                 break;
5989         case CARD_INFO_PORTS_100M:
5990                 speed = SPEED_100;
5991                 break;
5992         case CARD_INFO_PORTS_1G:
5993                 speed = SPEED_1000;
5994                 break;
5995         case CARD_INFO_PORTS_10G:
5996                 speed = SPEED_10000;
5997                 break;
5998         }
5999         ethtool_cmd_speed_set(ecmd, speed);
6000 
6001         return 0;
6002 }
6003 EXPORT_SYMBOL_GPL(qeth_core_ethtool_get_settings);
6004 
6005 static int __init qeth_core_init(void)
6006 {
6007         int rc;
6008 
6009         pr_info("loading core functions\n");
6010         INIT_LIST_HEAD(&qeth_core_card_list.list);
6011         INIT_LIST_HEAD(&qeth_dbf_list);
6012         rwlock_init(&qeth_core_card_list.rwlock);
6013         mutex_init(&qeth_mod_mutex);
6014 
6015         qeth_wq = create_singlethread_workqueue("qeth_wq");
6016 
6017         rc = qeth_register_dbf_views();
6018         if (rc)
6019                 goto out_err;
6020         qeth_core_root_dev = root_device_register("qeth");
6021         rc = PTR_ERR_OR_ZERO(qeth_core_root_dev);
6022         if (rc)
6023                 goto register_err;
6024         qeth_core_header_cache = kmem_cache_create("qeth_hdr",
6025                         sizeof(struct qeth_hdr) + ETH_HLEN, 64, 0, NULL);
6026         if (!qeth_core_header_cache) {
6027                 rc = -ENOMEM;
6028                 goto slab_err;
6029         }
6030         qeth_qdio_outbuf_cache = kmem_cache_create("qeth_buf",
6031                         sizeof(struct qeth_qdio_out_buffer), 0, 0, NULL);
6032         if (!qeth_qdio_outbuf_cache) {
6033                 rc = -ENOMEM;
6034                 goto cqslab_err;
6035         }
6036         rc = ccw_driver_register(&qeth_ccw_driver);
6037         if (rc)
6038                 goto ccw_err;
6039         qeth_core_ccwgroup_driver.driver.groups = qeth_drv_attr_groups;
6040         rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver);
6041         if (rc)
6042                 goto ccwgroup_err;
6043 
6044         return 0;
6045 
6046 ccwgroup_err:
6047         ccw_driver_unregister(&qeth_ccw_driver);
6048 ccw_err:
6049         kmem_cache_destroy(qeth_qdio_outbuf_cache);
6050 cqslab_err:
6051         kmem_cache_destroy(qeth_core_header_cache);
6052 slab_err:
6053         root_device_unregister(qeth_core_root_dev);
6054 register_err:
6055         qeth_unregister_dbf_views();
6056 out_err:
6057         pr_err("Initializing the qeth device driver failed\n");
6058         return rc;
6059 }
6060 
6061 static void __exit qeth_core_exit(void)
6062 {
6063         qeth_clear_dbf_list();
6064         destroy_workqueue(qeth_wq);
6065         ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver);
6066         ccw_driver_unregister(&qeth_ccw_driver);
6067         kmem_cache_destroy(qeth_qdio_outbuf_cache);
6068         kmem_cache_destroy(qeth_core_header_cache);
6069         root_device_unregister(qeth_core_root_dev);
6070         qeth_unregister_dbf_views();
6071         pr_info("core functions removed\n");
6072 }
6073 
6074 module_init(qeth_core_init);
6075 module_exit(qeth_core_exit);
6076 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
6077 MODULE_DESCRIPTION("qeth core functions");
6078 MODULE_LICENSE("GPL");
6079 

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