Version:  2.0.40 2.2.26 2.4.37 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 4.2

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_IQD:
649                         case IPA_CMD_SETBRIDGEPORT_OSA:
650                         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
651                                 if (card->discipline->control_event_handler
652                                                                 (card, cmd))
653                                         return cmd;
654                                 else
655                                         return NULL;
656                         case IPA_CMD_MODCCID:
657                                 return cmd;
658                         case IPA_CMD_REGISTER_LOCAL_ADDR:
659                                 QETH_CARD_TEXT(card, 3, "irla");
660                                 break;
661                         case IPA_CMD_UNREGISTER_LOCAL_ADDR:
662                                 QETH_CARD_TEXT(card, 3, "urla");
663                                 break;
664                         default:
665                                 QETH_DBF_MESSAGE(2, "Received data is IPA "
666                                            "but not a reply!\n");
667                                 break;
668                         }
669                 }
670         }
671         return cmd;
672 }
673 
674 void qeth_clear_ipacmd_list(struct qeth_card *card)
675 {
676         struct qeth_reply *reply, *r;
677         unsigned long flags;
678 
679         QETH_CARD_TEXT(card, 4, "clipalst");
680 
681         spin_lock_irqsave(&card->lock, flags);
682         list_for_each_entry_safe(reply, r, &card->cmd_waiter_list, list) {
683                 qeth_get_reply(reply);
684                 reply->rc = -EIO;
685                 atomic_inc(&reply->received);
686                 list_del_init(&reply->list);
687                 wake_up(&reply->wait_q);
688                 qeth_put_reply(reply);
689         }
690         spin_unlock_irqrestore(&card->lock, flags);
691         atomic_set(&card->write.irq_pending, 0);
692 }
693 EXPORT_SYMBOL_GPL(qeth_clear_ipacmd_list);
694 
695 static int qeth_check_idx_response(struct qeth_card *card,
696         unsigned char *buffer)
697 {
698         if (!buffer)
699                 return 0;
700 
701         QETH_DBF_HEX(CTRL, 2, buffer, QETH_DBF_CTRL_LEN);
702         if ((buffer[2] & 0xc0) == 0xc0) {
703                 QETH_DBF_MESSAGE(2, "received an IDX TERMINATE "
704                            "with cause code 0x%02x%s\n",
705                            buffer[4],
706                            ((buffer[4] == 0x22) ?
707                             " -- try another portname" : ""));
708                 QETH_CARD_TEXT(card, 2, "ckidxres");
709                 QETH_CARD_TEXT(card, 2, " idxterm");
710                 QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
711                 if (buffer[4] == 0xf6) {
712                         dev_err(&card->gdev->dev,
713                         "The qeth device is not configured "
714                         "for the OSI layer required by z/VM\n");
715                         return -EPERM;
716                 }
717                 return -EIO;
718         }
719         return 0;
720 }
721 
722 static struct qeth_card *CARD_FROM_CDEV(struct ccw_device *cdev)
723 {
724         struct qeth_card *card = dev_get_drvdata(&((struct ccwgroup_device *)
725                 dev_get_drvdata(&cdev->dev))->dev);
726         return card;
727 }
728 
729 static void qeth_setup_ccw(struct qeth_channel *channel, unsigned char *iob,
730                 __u32 len)
731 {
732         struct qeth_card *card;
733 
734         card = CARD_FROM_CDEV(channel->ccwdev);
735         QETH_CARD_TEXT(card, 4, "setupccw");
736         if (channel == &card->read)
737                 memcpy(&channel->ccw, READ_CCW, sizeof(struct ccw1));
738         else
739                 memcpy(&channel->ccw, WRITE_CCW, sizeof(struct ccw1));
740         channel->ccw.count = len;
741         channel->ccw.cda = (__u32) __pa(iob);
742 }
743 
744 static struct qeth_cmd_buffer *__qeth_get_buffer(struct qeth_channel *channel)
745 {
746         __u8 index;
747 
748         QETH_CARD_TEXT(CARD_FROM_CDEV(channel->ccwdev), 6, "getbuff");
749         index = channel->io_buf_no;
750         do {
751                 if (channel->iob[index].state == BUF_STATE_FREE) {
752                         channel->iob[index].state = BUF_STATE_LOCKED;
753                         channel->io_buf_no = (channel->io_buf_no + 1) %
754                                 QETH_CMD_BUFFER_NO;
755                         memset(channel->iob[index].data, 0, QETH_BUFSIZE);
756                         return channel->iob + index;
757                 }
758                 index = (index + 1) % QETH_CMD_BUFFER_NO;
759         } while (index != channel->io_buf_no);
760 
761         return NULL;
762 }
763 
764 void qeth_release_buffer(struct qeth_channel *channel,
765                 struct qeth_cmd_buffer *iob)
766 {
767         unsigned long flags;
768 
769         QETH_CARD_TEXT(CARD_FROM_CDEV(channel->ccwdev), 6, "relbuff");
770         spin_lock_irqsave(&channel->iob_lock, flags);
771         memset(iob->data, 0, QETH_BUFSIZE);
772         iob->state = BUF_STATE_FREE;
773         iob->callback = qeth_send_control_data_cb;
774         iob->rc = 0;
775         spin_unlock_irqrestore(&channel->iob_lock, flags);
776         wake_up(&channel->wait_q);
777 }
778 EXPORT_SYMBOL_GPL(qeth_release_buffer);
779 
780 static struct qeth_cmd_buffer *qeth_get_buffer(struct qeth_channel *channel)
781 {
782         struct qeth_cmd_buffer *buffer = NULL;
783         unsigned long flags;
784 
785         spin_lock_irqsave(&channel->iob_lock, flags);
786         buffer = __qeth_get_buffer(channel);
787         spin_unlock_irqrestore(&channel->iob_lock, flags);
788         return buffer;
789 }
790 
791 struct qeth_cmd_buffer *qeth_wait_for_buffer(struct qeth_channel *channel)
792 {
793         struct qeth_cmd_buffer *buffer;
794         wait_event(channel->wait_q,
795                    ((buffer = qeth_get_buffer(channel)) != NULL));
796         return buffer;
797 }
798 EXPORT_SYMBOL_GPL(qeth_wait_for_buffer);
799 
800 void qeth_clear_cmd_buffers(struct qeth_channel *channel)
801 {
802         int cnt;
803 
804         for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++)
805                 qeth_release_buffer(channel, &channel->iob[cnt]);
806         channel->buf_no = 0;
807         channel->io_buf_no = 0;
808 }
809 EXPORT_SYMBOL_GPL(qeth_clear_cmd_buffers);
810 
811 static void qeth_send_control_data_cb(struct qeth_channel *channel,
812                   struct qeth_cmd_buffer *iob)
813 {
814         struct qeth_card *card;
815         struct qeth_reply *reply, *r;
816         struct qeth_ipa_cmd *cmd;
817         unsigned long flags;
818         int keep_reply;
819         int rc = 0;
820 
821         card = CARD_FROM_CDEV(channel->ccwdev);
822         QETH_CARD_TEXT(card, 4, "sndctlcb");
823         rc = qeth_check_idx_response(card, iob->data);
824         switch (rc) {
825         case 0:
826                 break;
827         case -EIO:
828                 qeth_clear_ipacmd_list(card);
829                 qeth_schedule_recovery(card);
830                 /* fall through */
831         default:
832                 goto out;
833         }
834 
835         cmd = qeth_check_ipa_data(card, iob);
836         if ((cmd == NULL) && (card->state != CARD_STATE_DOWN))
837                 goto out;
838         /*in case of OSN : check if cmd is set */
839         if (card->info.type == QETH_CARD_TYPE_OSN &&
840             cmd &&
841             cmd->hdr.command != IPA_CMD_STARTLAN &&
842             card->osn_info.assist_cb != NULL) {
843                 card->osn_info.assist_cb(card->dev, cmd);
844                 goto out;
845         }
846 
847         spin_lock_irqsave(&card->lock, flags);
848         list_for_each_entry_safe(reply, r, &card->cmd_waiter_list, list) {
849                 if ((reply->seqno == QETH_IDX_COMMAND_SEQNO) ||
850                     ((cmd) && (reply->seqno == cmd->hdr.seqno))) {
851                         qeth_get_reply(reply);
852                         list_del_init(&reply->list);
853                         spin_unlock_irqrestore(&card->lock, flags);
854                         keep_reply = 0;
855                         if (reply->callback != NULL) {
856                                 if (cmd) {
857                                         reply->offset = (__u16)((char *)cmd -
858                                                         (char *)iob->data);
859                                         keep_reply = reply->callback(card,
860                                                         reply,
861                                                         (unsigned long)cmd);
862                                 } else
863                                         keep_reply = reply->callback(card,
864                                                         reply,
865                                                         (unsigned long)iob);
866                         }
867                         if (cmd)
868                                 reply->rc = (u16) cmd->hdr.return_code;
869                         else if (iob->rc)
870                                 reply->rc = iob->rc;
871                         if (keep_reply) {
872                                 spin_lock_irqsave(&card->lock, flags);
873                                 list_add_tail(&reply->list,
874                                               &card->cmd_waiter_list);
875                                 spin_unlock_irqrestore(&card->lock, flags);
876                         } else {
877                                 atomic_inc(&reply->received);
878                                 wake_up(&reply->wait_q);
879                         }
880                         qeth_put_reply(reply);
881                         goto out;
882                 }
883         }
884         spin_unlock_irqrestore(&card->lock, flags);
885 out:
886         memcpy(&card->seqno.pdu_hdr_ack,
887                 QETH_PDU_HEADER_SEQ_NO(iob->data),
888                 QETH_SEQ_NO_LENGTH);
889         qeth_release_buffer(channel, iob);
890 }
891 
892 static int qeth_setup_channel(struct qeth_channel *channel)
893 {
894         int cnt;
895 
896         QETH_DBF_TEXT(SETUP, 2, "setupch");
897         for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++) {
898                 channel->iob[cnt].data =
899                         kzalloc(QETH_BUFSIZE, GFP_DMA|GFP_KERNEL);
900                 if (channel->iob[cnt].data == NULL)
901                         break;
902                 channel->iob[cnt].state = BUF_STATE_FREE;
903                 channel->iob[cnt].channel = channel;
904                 channel->iob[cnt].callback = qeth_send_control_data_cb;
905                 channel->iob[cnt].rc = 0;
906         }
907         if (cnt < QETH_CMD_BUFFER_NO) {
908                 while (cnt-- > 0)
909                         kfree(channel->iob[cnt].data);
910                 return -ENOMEM;
911         }
912         channel->buf_no = 0;
913         channel->io_buf_no = 0;
914         atomic_set(&channel->irq_pending, 0);
915         spin_lock_init(&channel->iob_lock);
916 
917         init_waitqueue_head(&channel->wait_q);
918         return 0;
919 }
920 
921 static int qeth_set_thread_start_bit(struct qeth_card *card,
922                 unsigned long thread)
923 {
924         unsigned long flags;
925 
926         spin_lock_irqsave(&card->thread_mask_lock, flags);
927         if (!(card->thread_allowed_mask & thread) ||
928               (card->thread_start_mask & thread)) {
929                 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
930                 return -EPERM;
931         }
932         card->thread_start_mask |= thread;
933         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
934         return 0;
935 }
936 
937 void qeth_clear_thread_start_bit(struct qeth_card *card, unsigned long thread)
938 {
939         unsigned long flags;
940 
941         spin_lock_irqsave(&card->thread_mask_lock, flags);
942         card->thread_start_mask &= ~thread;
943         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
944         wake_up(&card->wait_q);
945 }
946 EXPORT_SYMBOL_GPL(qeth_clear_thread_start_bit);
947 
948 void qeth_clear_thread_running_bit(struct qeth_card *card, unsigned long thread)
949 {
950         unsigned long flags;
951 
952         spin_lock_irqsave(&card->thread_mask_lock, flags);
953         card->thread_running_mask &= ~thread;
954         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
955         wake_up(&card->wait_q);
956 }
957 EXPORT_SYMBOL_GPL(qeth_clear_thread_running_bit);
958 
959 static int __qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
960 {
961         unsigned long flags;
962         int rc = 0;
963 
964         spin_lock_irqsave(&card->thread_mask_lock, flags);
965         if (card->thread_start_mask & thread) {
966                 if ((card->thread_allowed_mask & thread) &&
967                     !(card->thread_running_mask & thread)) {
968                         rc = 1;
969                         card->thread_start_mask &= ~thread;
970                         card->thread_running_mask |= thread;
971                 } else
972                         rc = -EPERM;
973         }
974         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
975         return rc;
976 }
977 
978 int qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
979 {
980         int rc = 0;
981 
982         wait_event(card->wait_q,
983                    (rc = __qeth_do_run_thread(card, thread)) >= 0);
984         return rc;
985 }
986 EXPORT_SYMBOL_GPL(qeth_do_run_thread);
987 
988 void qeth_schedule_recovery(struct qeth_card *card)
989 {
990         QETH_CARD_TEXT(card, 2, "startrec");
991         if (qeth_set_thread_start_bit(card, QETH_RECOVER_THREAD) == 0)
992                 schedule_work(&card->kernel_thread_starter);
993 }
994 EXPORT_SYMBOL_GPL(qeth_schedule_recovery);
995 
996 static int qeth_get_problem(struct ccw_device *cdev, struct irb *irb)
997 {
998         int dstat, cstat;
999         char *sense;
1000         struct qeth_card *card;
1001 
1002         sense = (char *) irb->ecw;
1003         cstat = irb->scsw.cmd.cstat;
1004         dstat = irb->scsw.cmd.dstat;
1005         card = CARD_FROM_CDEV(cdev);
1006 
1007         if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK |
1008                      SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK |
1009                      SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) {
1010                 QETH_CARD_TEXT(card, 2, "CGENCHK");
1011                 dev_warn(&cdev->dev, "The qeth device driver "
1012                         "failed to recover an error on the device\n");
1013                 QETH_DBF_MESSAGE(2, "%s check on device dstat=x%x, cstat=x%x\n",
1014                         dev_name(&cdev->dev), dstat, cstat);
1015                 print_hex_dump(KERN_WARNING, "qeth: irb ", DUMP_PREFIX_OFFSET,
1016                                 16, 1, irb, 64, 1);
1017                 return 1;
1018         }
1019 
1020         if (dstat & DEV_STAT_UNIT_CHECK) {
1021                 if (sense[SENSE_RESETTING_EVENT_BYTE] &
1022                     SENSE_RESETTING_EVENT_FLAG) {
1023                         QETH_CARD_TEXT(card, 2, "REVIND");
1024                         return 1;
1025                 }
1026                 if (sense[SENSE_COMMAND_REJECT_BYTE] &
1027                     SENSE_COMMAND_REJECT_FLAG) {
1028                         QETH_CARD_TEXT(card, 2, "CMDREJi");
1029                         return 1;
1030                 }
1031                 if ((sense[2] == 0xaf) && (sense[3] == 0xfe)) {
1032                         QETH_CARD_TEXT(card, 2, "AFFE");
1033                         return 1;
1034                 }
1035                 if ((!sense[0]) && (!sense[1]) && (!sense[2]) && (!sense[3])) {
1036                         QETH_CARD_TEXT(card, 2, "ZEROSEN");
1037                         return 0;
1038                 }
1039                 QETH_CARD_TEXT(card, 2, "DGENCHK");
1040                         return 1;
1041         }
1042         return 0;
1043 }
1044 
1045 static long __qeth_check_irb_error(struct ccw_device *cdev,
1046                 unsigned long intparm, struct irb *irb)
1047 {
1048         struct qeth_card *card;
1049 
1050         card = CARD_FROM_CDEV(cdev);
1051 
1052         if (!card || !IS_ERR(irb))
1053                 return 0;
1054 
1055         switch (PTR_ERR(irb)) {
1056         case -EIO:
1057                 QETH_DBF_MESSAGE(2, "%s i/o-error on device\n",
1058                         dev_name(&cdev->dev));
1059                 QETH_CARD_TEXT(card, 2, "ckirberr");
1060                 QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
1061                 break;
1062         case -ETIMEDOUT:
1063                 dev_warn(&cdev->dev, "A hardware operation timed out"
1064                         " on the device\n");
1065                 QETH_CARD_TEXT(card, 2, "ckirberr");
1066                 QETH_CARD_TEXT_(card, 2, "  rc%d", -ETIMEDOUT);
1067                 if (intparm == QETH_RCD_PARM) {
1068                         if (card->data.ccwdev == cdev) {
1069                                 card->data.state = CH_STATE_DOWN;
1070                                 wake_up(&card->wait_q);
1071                         }
1072                 }
1073                 break;
1074         default:
1075                 QETH_DBF_MESSAGE(2, "%s unknown error %ld on device\n",
1076                         dev_name(&cdev->dev), PTR_ERR(irb));
1077                 QETH_CARD_TEXT(card, 2, "ckirberr");
1078                 QETH_CARD_TEXT(card, 2, "  rc???");
1079         }
1080         return PTR_ERR(irb);
1081 }
1082 
1083 static void qeth_irq(struct ccw_device *cdev, unsigned long intparm,
1084                 struct irb *irb)
1085 {
1086         int rc;
1087         int cstat, dstat;
1088         struct qeth_cmd_buffer *buffer;
1089         struct qeth_channel *channel;
1090         struct qeth_card *card;
1091         struct qeth_cmd_buffer *iob;
1092         __u8 index;
1093 
1094         if (__qeth_check_irb_error(cdev, intparm, irb))
1095                 return;
1096         cstat = irb->scsw.cmd.cstat;
1097         dstat = irb->scsw.cmd.dstat;
1098 
1099         card = CARD_FROM_CDEV(cdev);
1100         if (!card)
1101                 return;
1102 
1103         QETH_CARD_TEXT(card, 5, "irq");
1104 
1105         if (card->read.ccwdev == cdev) {
1106                 channel = &card->read;
1107                 QETH_CARD_TEXT(card, 5, "read");
1108         } else if (card->write.ccwdev == cdev) {
1109                 channel = &card->write;
1110                 QETH_CARD_TEXT(card, 5, "write");
1111         } else {
1112                 channel = &card->data;
1113                 QETH_CARD_TEXT(card, 5, "data");
1114         }
1115         atomic_set(&channel->irq_pending, 0);
1116 
1117         if (irb->scsw.cmd.fctl & (SCSW_FCTL_CLEAR_FUNC))
1118                 channel->state = CH_STATE_STOPPED;
1119 
1120         if (irb->scsw.cmd.fctl & (SCSW_FCTL_HALT_FUNC))
1121                 channel->state = CH_STATE_HALTED;
1122 
1123         /*let's wake up immediately on data channel*/
1124         if ((channel == &card->data) && (intparm != 0) &&
1125             (intparm != QETH_RCD_PARM))
1126                 goto out;
1127 
1128         if (intparm == QETH_CLEAR_CHANNEL_PARM) {
1129                 QETH_CARD_TEXT(card, 6, "clrchpar");
1130                 /* we don't have to handle this further */
1131                 intparm = 0;
1132         }
1133         if (intparm == QETH_HALT_CHANNEL_PARM) {
1134                 QETH_CARD_TEXT(card, 6, "hltchpar");
1135                 /* we don't have to handle this further */
1136                 intparm = 0;
1137         }
1138         if ((dstat & DEV_STAT_UNIT_EXCEP) ||
1139             (dstat & DEV_STAT_UNIT_CHECK) ||
1140             (cstat)) {
1141                 if (irb->esw.esw0.erw.cons) {
1142                         dev_warn(&channel->ccwdev->dev,
1143                                 "The qeth device driver failed to recover "
1144                                 "an error on the device\n");
1145                         QETH_DBF_MESSAGE(2, "%s sense data available. cstat "
1146                                 "0x%X dstat 0x%X\n",
1147                                 dev_name(&channel->ccwdev->dev), cstat, dstat);
1148                         print_hex_dump(KERN_WARNING, "qeth: irb ",
1149                                 DUMP_PREFIX_OFFSET, 16, 1, irb, 32, 1);
1150                         print_hex_dump(KERN_WARNING, "qeth: sense data ",
1151                                 DUMP_PREFIX_OFFSET, 16, 1, irb->ecw, 32, 1);
1152                 }
1153                 if (intparm == QETH_RCD_PARM) {
1154                         channel->state = CH_STATE_DOWN;
1155                         goto out;
1156                 }
1157                 rc = qeth_get_problem(cdev, irb);
1158                 if (rc) {
1159                         qeth_clear_ipacmd_list(card);
1160                         qeth_schedule_recovery(card);
1161                         goto out;
1162                 }
1163         }
1164 
1165         if (intparm == QETH_RCD_PARM) {
1166                 channel->state = CH_STATE_RCD_DONE;
1167                 goto out;
1168         }
1169         if (intparm) {
1170                 buffer = (struct qeth_cmd_buffer *) __va((addr_t)intparm);
1171                 buffer->state = BUF_STATE_PROCESSED;
1172         }
1173         if (channel == &card->data)
1174                 return;
1175         if (channel == &card->read &&
1176             channel->state == CH_STATE_UP)
1177                 qeth_issue_next_read(card);
1178 
1179         iob = channel->iob;
1180         index = channel->buf_no;
1181         while (iob[index].state == BUF_STATE_PROCESSED) {
1182                 if (iob[index].callback != NULL)
1183                         iob[index].callback(channel, iob + index);
1184 
1185                 index = (index + 1) % QETH_CMD_BUFFER_NO;
1186         }
1187         channel->buf_no = index;
1188 out:
1189         wake_up(&card->wait_q);
1190         return;
1191 }
1192 
1193 static void qeth_notify_skbs(struct qeth_qdio_out_q *q,
1194                 struct qeth_qdio_out_buffer *buf,
1195                 enum iucv_tx_notify notification)
1196 {
1197         struct sk_buff *skb;
1198 
1199         if (skb_queue_empty(&buf->skb_list))
1200                 goto out;
1201         skb = skb_peek(&buf->skb_list);
1202         while (skb) {
1203                 QETH_CARD_TEXT_(q->card, 5, "skbn%d", notification);
1204                 QETH_CARD_TEXT_(q->card, 5, "%lx", (long) skb);
1205                 if (skb->protocol == ETH_P_AF_IUCV) {
1206                         if (skb->sk) {
1207                                 struct iucv_sock *iucv = iucv_sk(skb->sk);
1208                                 iucv->sk_txnotify(skb, notification);
1209                         }
1210                 }
1211                 if (skb_queue_is_last(&buf->skb_list, skb))
1212                         skb = NULL;
1213                 else
1214                         skb = skb_queue_next(&buf->skb_list, skb);
1215         }
1216 out:
1217         return;
1218 }
1219 
1220 static void qeth_release_skbs(struct qeth_qdio_out_buffer *buf)
1221 {
1222         struct sk_buff *skb;
1223         struct iucv_sock *iucv;
1224         int notify_general_error = 0;
1225 
1226         if (atomic_read(&buf->state) == QETH_QDIO_BUF_PENDING)
1227                 notify_general_error = 1;
1228 
1229         /* release may never happen from within CQ tasklet scope */
1230         WARN_ON_ONCE(atomic_read(&buf->state) == QETH_QDIO_BUF_IN_CQ);
1231 
1232         skb = skb_dequeue(&buf->skb_list);
1233         while (skb) {
1234                 QETH_CARD_TEXT(buf->q->card, 5, "skbr");
1235                 QETH_CARD_TEXT_(buf->q->card, 5, "%lx", (long) skb);
1236                 if (notify_general_error && skb->protocol == ETH_P_AF_IUCV) {
1237                         if (skb->sk) {
1238                                 iucv = iucv_sk(skb->sk);
1239                                 iucv->sk_txnotify(skb, TX_NOTIFY_GENERALERROR);
1240                         }
1241                 }
1242                 atomic_dec(&skb->users);
1243                 dev_kfree_skb_any(skb);
1244                 skb = skb_dequeue(&buf->skb_list);
1245         }
1246 }
1247 
1248 static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
1249                 struct qeth_qdio_out_buffer *buf,
1250                 enum qeth_qdio_buffer_states newbufstate)
1251 {
1252         int i;
1253 
1254         /* is PCI flag set on buffer? */
1255         if (buf->buffer->element[0].sflags & SBAL_SFLAGS0_PCI_REQ)
1256                 atomic_dec(&queue->set_pci_flags_count);
1257 
1258         if (newbufstate == QETH_QDIO_BUF_EMPTY) {
1259                 qeth_release_skbs(buf);
1260         }
1261         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(queue->card); ++i) {
1262                 if (buf->buffer->element[i].addr && buf->is_header[i])
1263                         kmem_cache_free(qeth_core_header_cache,
1264                                 buf->buffer->element[i].addr);
1265                 buf->is_header[i] = 0;
1266                 buf->buffer->element[i].length = 0;
1267                 buf->buffer->element[i].addr = NULL;
1268                 buf->buffer->element[i].eflags = 0;
1269                 buf->buffer->element[i].sflags = 0;
1270         }
1271         buf->buffer->element[15].eflags = 0;
1272         buf->buffer->element[15].sflags = 0;
1273         buf->next_element_to_fill = 0;
1274         atomic_set(&buf->state, newbufstate);
1275 }
1276 
1277 static void qeth_clear_outq_buffers(struct qeth_qdio_out_q *q, int free)
1278 {
1279         int j;
1280 
1281         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
1282                 if (!q->bufs[j])
1283                         continue;
1284                 qeth_cleanup_handled_pending(q, j, 1);
1285                 qeth_clear_output_buffer(q, q->bufs[j], QETH_QDIO_BUF_EMPTY);
1286                 if (free) {
1287                         kmem_cache_free(qeth_qdio_outbuf_cache, q->bufs[j]);
1288                         q->bufs[j] = NULL;
1289                 }
1290         }
1291 }
1292 
1293 void qeth_clear_qdio_buffers(struct qeth_card *card)
1294 {
1295         int i;
1296 
1297         QETH_CARD_TEXT(card, 2, "clearqdbf");
1298         /* clear outbound buffers to free skbs */
1299         for (i = 0; i < card->qdio.no_out_queues; ++i) {
1300                 if (card->qdio.out_qs[i]) {
1301                         qeth_clear_outq_buffers(card->qdio.out_qs[i], 0);
1302                 }
1303         }
1304 }
1305 EXPORT_SYMBOL_GPL(qeth_clear_qdio_buffers);
1306 
1307 static void qeth_free_buffer_pool(struct qeth_card *card)
1308 {
1309         struct qeth_buffer_pool_entry *pool_entry, *tmp;
1310         int i = 0;
1311         list_for_each_entry_safe(pool_entry, tmp,
1312                                  &card->qdio.init_pool.entry_list, init_list){
1313                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i)
1314                         free_page((unsigned long)pool_entry->elements[i]);
1315                 list_del(&pool_entry->init_list);
1316                 kfree(pool_entry);
1317         }
1318 }
1319 
1320 static void qeth_clean_channel(struct qeth_channel *channel)
1321 {
1322         int cnt;
1323 
1324         QETH_DBF_TEXT(SETUP, 2, "freech");
1325         for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++)
1326                 kfree(channel->iob[cnt].data);
1327 }
1328 
1329 static void qeth_set_single_write_queues(struct qeth_card *card)
1330 {
1331         if ((atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED) &&
1332             (card->qdio.no_out_queues == 4))
1333                 qeth_free_qdio_buffers(card);
1334 
1335         card->qdio.no_out_queues = 1;
1336         if (card->qdio.default_out_queue != 0)
1337                 dev_info(&card->gdev->dev, "Priority Queueing not supported\n");
1338 
1339         card->qdio.default_out_queue = 0;
1340 }
1341 
1342 static void qeth_set_multiple_write_queues(struct qeth_card *card)
1343 {
1344         if ((atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED) &&
1345             (card->qdio.no_out_queues == 1)) {
1346                 qeth_free_qdio_buffers(card);
1347                 card->qdio.default_out_queue = 2;
1348         }
1349         card->qdio.no_out_queues = 4;
1350 }
1351 
1352 static void qeth_update_from_chp_desc(struct qeth_card *card)
1353 {
1354         struct ccw_device *ccwdev;
1355         struct channel_path_desc *chp_dsc;
1356 
1357         QETH_DBF_TEXT(SETUP, 2, "chp_desc");
1358 
1359         ccwdev = card->data.ccwdev;
1360         chp_dsc = ccw_device_get_chp_desc(ccwdev, 0);
1361         if (!chp_dsc)
1362                 goto out;
1363 
1364         card->info.func_level = 0x4100 + chp_dsc->desc;
1365         if (card->info.type == QETH_CARD_TYPE_IQD)
1366                 goto out;
1367 
1368         /* CHPP field bit 6 == 1 -> single queue */
1369         if ((chp_dsc->chpp & 0x02) == 0x02)
1370                 qeth_set_single_write_queues(card);
1371         else
1372                 qeth_set_multiple_write_queues(card);
1373 out:
1374         kfree(chp_dsc);
1375         QETH_DBF_TEXT_(SETUP, 2, "nr:%x", card->qdio.no_out_queues);
1376         QETH_DBF_TEXT_(SETUP, 2, "lvl:%02x", card->info.func_level);
1377 }
1378 
1379 static void qeth_init_qdio_info(struct qeth_card *card)
1380 {
1381         QETH_DBF_TEXT(SETUP, 4, "intqdinf");
1382         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
1383         /* inbound */
1384         card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
1385         if (card->info.type == QETH_CARD_TYPE_IQD)
1386                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_HSDEFAULT;
1387         else
1388                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_DEFAULT;
1389         card->qdio.in_buf_pool.buf_count = card->qdio.init_pool.buf_count;
1390         INIT_LIST_HEAD(&card->qdio.in_buf_pool.entry_list);
1391         INIT_LIST_HEAD(&card->qdio.init_pool.entry_list);
1392 }
1393 
1394 static void qeth_set_intial_options(struct qeth_card *card)
1395 {
1396         card->options.route4.type = NO_ROUTER;
1397         card->options.route6.type = NO_ROUTER;
1398         card->options.fake_broadcast = 0;
1399         card->options.add_hhlen = DEFAULT_ADD_HHLEN;
1400         card->options.performance_stats = 0;
1401         card->options.rx_sg_cb = QETH_RX_SG_CB;
1402         card->options.isolation = ISOLATION_MODE_NONE;
1403         card->options.cq = QETH_CQ_DISABLED;
1404 }
1405 
1406 static int qeth_do_start_thread(struct qeth_card *card, unsigned long thread)
1407 {
1408         unsigned long flags;
1409         int rc = 0;
1410 
1411         spin_lock_irqsave(&card->thread_mask_lock, flags);
1412         QETH_CARD_TEXT_(card, 4, "  %02x%02x%02x",
1413                         (u8) card->thread_start_mask,
1414                         (u8) card->thread_allowed_mask,
1415                         (u8) card->thread_running_mask);
1416         rc = (card->thread_start_mask & thread);
1417         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1418         return rc;
1419 }
1420 
1421 static void qeth_start_kernel_thread(struct work_struct *work)
1422 {
1423         struct task_struct *ts;
1424         struct qeth_card *card = container_of(work, struct qeth_card,
1425                                         kernel_thread_starter);
1426         QETH_CARD_TEXT(card , 2, "strthrd");
1427 
1428         if (card->read.state != CH_STATE_UP &&
1429             card->write.state != CH_STATE_UP)
1430                 return;
1431         if (qeth_do_start_thread(card, QETH_RECOVER_THREAD)) {
1432                 ts = kthread_run(card->discipline->recover, (void *)card,
1433                                 "qeth_recover");
1434                 if (IS_ERR(ts)) {
1435                         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1436                         qeth_clear_thread_running_bit(card,
1437                                 QETH_RECOVER_THREAD);
1438                 }
1439         }
1440 }
1441 
1442 static void qeth_buffer_reclaim_work(struct work_struct *);
1443 static int qeth_setup_card(struct qeth_card *card)
1444 {
1445 
1446         QETH_DBF_TEXT(SETUP, 2, "setupcrd");
1447         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1448 
1449         card->read.state  = CH_STATE_DOWN;
1450         card->write.state = CH_STATE_DOWN;
1451         card->data.state  = CH_STATE_DOWN;
1452         card->state = CARD_STATE_DOWN;
1453         card->lan_online = 0;
1454         card->read_or_write_problem = 0;
1455         card->dev = NULL;
1456         spin_lock_init(&card->vlanlock);
1457         spin_lock_init(&card->mclock);
1458         spin_lock_init(&card->lock);
1459         spin_lock_init(&card->ip_lock);
1460         spin_lock_init(&card->thread_mask_lock);
1461         mutex_init(&card->conf_mutex);
1462         mutex_init(&card->discipline_mutex);
1463         card->thread_start_mask = 0;
1464         card->thread_allowed_mask = 0;
1465         card->thread_running_mask = 0;
1466         INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread);
1467         INIT_LIST_HEAD(&card->ip_list);
1468         INIT_LIST_HEAD(card->ip_tbd_list);
1469         INIT_LIST_HEAD(&card->cmd_waiter_list);
1470         init_waitqueue_head(&card->wait_q);
1471         /* initial options */
1472         qeth_set_intial_options(card);
1473         /* IP address takeover */
1474         INIT_LIST_HEAD(&card->ipato.entries);
1475         card->ipato.enabled = 0;
1476         card->ipato.invert4 = 0;
1477         card->ipato.invert6 = 0;
1478         /* init QDIO stuff */
1479         qeth_init_qdio_info(card);
1480         INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work);
1481         INIT_WORK(&card->close_dev_work, qeth_close_dev_handler);
1482         return 0;
1483 }
1484 
1485 static void qeth_core_sl_print(struct seq_file *m, struct service_level *slr)
1486 {
1487         struct qeth_card *card = container_of(slr, struct qeth_card,
1488                                         qeth_service_level);
1489         if (card->info.mcl_level[0])
1490                 seq_printf(m, "qeth: %s firmware level %s\n",
1491                         CARD_BUS_ID(card), card->info.mcl_level);
1492 }
1493 
1494 static struct qeth_card *qeth_alloc_card(void)
1495 {
1496         struct qeth_card *card;
1497 
1498         QETH_DBF_TEXT(SETUP, 2, "alloccrd");
1499         card = kzalloc(sizeof(struct qeth_card), GFP_DMA|GFP_KERNEL);
1500         if (!card)
1501                 goto out;
1502         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1503         card->ip_tbd_list = kzalloc(sizeof(struct list_head), GFP_KERNEL);
1504         if (!card->ip_tbd_list) {
1505                 QETH_DBF_TEXT(SETUP, 0, "iptbdnom");
1506                 goto out_card;
1507         }
1508         if (qeth_setup_channel(&card->read))
1509                 goto out_ip;
1510         if (qeth_setup_channel(&card->write))
1511                 goto out_channel;
1512         card->options.layer2 = -1;
1513         card->qeth_service_level.seq_print = qeth_core_sl_print;
1514         register_service_level(&card->qeth_service_level);
1515         return card;
1516 
1517 out_channel:
1518         qeth_clean_channel(&card->read);
1519 out_ip:
1520         kfree(card->ip_tbd_list);
1521 out_card:
1522         kfree(card);
1523 out:
1524         return NULL;
1525 }
1526 
1527 static int qeth_determine_card_type(struct qeth_card *card)
1528 {
1529         int i = 0;
1530 
1531         QETH_DBF_TEXT(SETUP, 2, "detcdtyp");
1532 
1533         card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT;
1534         card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
1535         while (known_devices[i][QETH_DEV_MODEL_IND]) {
1536                 if ((CARD_RDEV(card)->id.dev_type ==
1537                                 known_devices[i][QETH_DEV_TYPE_IND]) &&
1538                     (CARD_RDEV(card)->id.dev_model ==
1539                                 known_devices[i][QETH_DEV_MODEL_IND])) {
1540                         card->info.type = known_devices[i][QETH_DEV_MODEL_IND];
1541                         card->qdio.no_out_queues =
1542                                 known_devices[i][QETH_QUEUE_NO_IND];
1543                         card->qdio.no_in_queues = 1;
1544                         card->info.is_multicast_different =
1545                                 known_devices[i][QETH_MULTICAST_IND];
1546                         qeth_update_from_chp_desc(card);
1547                         return 0;
1548                 }
1549                 i++;
1550         }
1551         card->info.type = QETH_CARD_TYPE_UNKNOWN;
1552         dev_err(&card->gdev->dev, "The adapter hardware is of an "
1553                 "unknown type\n");
1554         return -ENOENT;
1555 }
1556 
1557 static int qeth_clear_channel(struct qeth_channel *channel)
1558 {
1559         unsigned long flags;
1560         struct qeth_card *card;
1561         int rc;
1562 
1563         card = CARD_FROM_CDEV(channel->ccwdev);
1564         QETH_CARD_TEXT(card, 3, "clearch");
1565         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1566         rc = ccw_device_clear(channel->ccwdev, QETH_CLEAR_CHANNEL_PARM);
1567         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1568 
1569         if (rc)
1570                 return rc;
1571         rc = wait_event_interruptible_timeout(card->wait_q,
1572                         channel->state == CH_STATE_STOPPED, QETH_TIMEOUT);
1573         if (rc == -ERESTARTSYS)
1574                 return rc;
1575         if (channel->state != CH_STATE_STOPPED)
1576                 return -ETIME;
1577         channel->state = CH_STATE_DOWN;
1578         return 0;
1579 }
1580 
1581 static int qeth_halt_channel(struct qeth_channel *channel)
1582 {
1583         unsigned long flags;
1584         struct qeth_card *card;
1585         int rc;
1586 
1587         card = CARD_FROM_CDEV(channel->ccwdev);
1588         QETH_CARD_TEXT(card, 3, "haltch");
1589         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1590         rc = ccw_device_halt(channel->ccwdev, QETH_HALT_CHANNEL_PARM);
1591         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1592 
1593         if (rc)
1594                 return rc;
1595         rc = wait_event_interruptible_timeout(card->wait_q,
1596                         channel->state == CH_STATE_HALTED, QETH_TIMEOUT);
1597         if (rc == -ERESTARTSYS)
1598                 return rc;
1599         if (channel->state != CH_STATE_HALTED)
1600                 return -ETIME;
1601         return 0;
1602 }
1603 
1604 static int qeth_halt_channels(struct qeth_card *card)
1605 {
1606         int rc1 = 0, rc2 = 0, rc3 = 0;
1607 
1608         QETH_CARD_TEXT(card, 3, "haltchs");
1609         rc1 = qeth_halt_channel(&card->read);
1610         rc2 = qeth_halt_channel(&card->write);
1611         rc3 = qeth_halt_channel(&card->data);
1612         if (rc1)
1613                 return rc1;
1614         if (rc2)
1615                 return rc2;
1616         return rc3;
1617 }
1618 
1619 static int qeth_clear_channels(struct qeth_card *card)
1620 {
1621         int rc1 = 0, rc2 = 0, rc3 = 0;
1622 
1623         QETH_CARD_TEXT(card, 3, "clearchs");
1624         rc1 = qeth_clear_channel(&card->read);
1625         rc2 = qeth_clear_channel(&card->write);
1626         rc3 = qeth_clear_channel(&card->data);
1627         if (rc1)
1628                 return rc1;
1629         if (rc2)
1630                 return rc2;
1631         return rc3;
1632 }
1633 
1634 static int qeth_clear_halt_card(struct qeth_card *card, int halt)
1635 {
1636         int rc = 0;
1637 
1638         QETH_CARD_TEXT(card, 3, "clhacrd");
1639 
1640         if (halt)
1641                 rc = qeth_halt_channels(card);
1642         if (rc)
1643                 return rc;
1644         return qeth_clear_channels(card);
1645 }
1646 
1647 int qeth_qdio_clear_card(struct qeth_card *card, int use_halt)
1648 {
1649         int rc = 0;
1650 
1651         QETH_CARD_TEXT(card, 3, "qdioclr");
1652         switch (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ESTABLISHED,
1653                 QETH_QDIO_CLEANING)) {
1654         case QETH_QDIO_ESTABLISHED:
1655                 if (card->info.type == QETH_CARD_TYPE_IQD)
1656                         rc = qdio_shutdown(CARD_DDEV(card),
1657                                 QDIO_FLAG_CLEANUP_USING_HALT);
1658                 else
1659                         rc = qdio_shutdown(CARD_DDEV(card),
1660                                 QDIO_FLAG_CLEANUP_USING_CLEAR);
1661                 if (rc)
1662                         QETH_CARD_TEXT_(card, 3, "1err%d", rc);
1663                 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
1664                 break;
1665         case QETH_QDIO_CLEANING:
1666                 return rc;
1667         default:
1668                 break;
1669         }
1670         rc = qeth_clear_halt_card(card, use_halt);
1671         if (rc)
1672                 QETH_CARD_TEXT_(card, 3, "2err%d", rc);
1673         card->state = CARD_STATE_DOWN;
1674         return rc;
1675 }
1676 EXPORT_SYMBOL_GPL(qeth_qdio_clear_card);
1677 
1678 static int qeth_read_conf_data(struct qeth_card *card, void **buffer,
1679                                int *length)
1680 {
1681         struct ciw *ciw;
1682         char *rcd_buf;
1683         int ret;
1684         struct qeth_channel *channel = &card->data;
1685         unsigned long flags;
1686 
1687         /*
1688          * scan for RCD command in extended SenseID data
1689          */
1690         ciw = ccw_device_get_ciw(channel->ccwdev, CIW_TYPE_RCD);
1691         if (!ciw || ciw->cmd == 0)
1692                 return -EOPNOTSUPP;
1693         rcd_buf = kzalloc(ciw->count, GFP_KERNEL | GFP_DMA);
1694         if (!rcd_buf)
1695                 return -ENOMEM;
1696 
1697         channel->ccw.cmd_code = ciw->cmd;
1698         channel->ccw.cda = (__u32) __pa(rcd_buf);
1699         channel->ccw.count = ciw->count;
1700         channel->ccw.flags = CCW_FLAG_SLI;
1701         channel->state = CH_STATE_RCD;
1702         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1703         ret = ccw_device_start_timeout(channel->ccwdev, &channel->ccw,
1704                                        QETH_RCD_PARM, LPM_ANYPATH, 0,
1705                                        QETH_RCD_TIMEOUT);
1706         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1707         if (!ret)
1708                 wait_event(card->wait_q,
1709                            (channel->state == CH_STATE_RCD_DONE ||
1710                             channel->state == CH_STATE_DOWN));
1711         if (channel->state == CH_STATE_DOWN)
1712                 ret = -EIO;
1713         else
1714                 channel->state = CH_STATE_DOWN;
1715         if (ret) {
1716                 kfree(rcd_buf);
1717                 *buffer = NULL;
1718                 *length = 0;
1719         } else {
1720                 *length = ciw->count;
1721                 *buffer = rcd_buf;
1722         }
1723         return ret;
1724 }
1725 
1726 static void qeth_configure_unitaddr(struct qeth_card *card, char *prcd)
1727 {
1728         QETH_DBF_TEXT(SETUP, 2, "cfgunit");
1729         card->info.chpid = prcd[30];
1730         card->info.unit_addr2 = prcd[31];
1731         card->info.cula = prcd[63];
1732         card->info.guestlan = ((prcd[0x10] == _ascebc['V']) &&
1733                                (prcd[0x11] == _ascebc['M']));
1734 }
1735 
1736 static void qeth_configure_blkt_default(struct qeth_card *card, char *prcd)
1737 {
1738         QETH_DBF_TEXT(SETUP, 2, "cfgblkt");
1739 
1740         if (prcd[74] == 0xF0 && prcd[75] == 0xF0 &&
1741             prcd[76] >= 0xF1 && prcd[76] <= 0xF4) {
1742                 card->info.blkt.time_total = 0;
1743                 card->info.blkt.inter_packet = 0;
1744                 card->info.blkt.inter_packet_jumbo = 0;
1745         } else {
1746                 card->info.blkt.time_total = 250;
1747                 card->info.blkt.inter_packet = 5;
1748                 card->info.blkt.inter_packet_jumbo = 15;
1749         }
1750 }
1751 
1752 static void qeth_init_tokens(struct qeth_card *card)
1753 {
1754         card->token.issuer_rm_w = 0x00010103UL;
1755         card->token.cm_filter_w = 0x00010108UL;
1756         card->token.cm_connection_w = 0x0001010aUL;
1757         card->token.ulp_filter_w = 0x0001010bUL;
1758         card->token.ulp_connection_w = 0x0001010dUL;
1759 }
1760 
1761 static void qeth_init_func_level(struct qeth_card *card)
1762 {
1763         switch (card->info.type) {
1764         case QETH_CARD_TYPE_IQD:
1765                 card->info.func_level = QETH_IDX_FUNC_LEVEL_IQD;
1766                 break;
1767         case QETH_CARD_TYPE_OSD:
1768         case QETH_CARD_TYPE_OSN:
1769                 card->info.func_level = QETH_IDX_FUNC_LEVEL_OSD;
1770                 break;
1771         default:
1772                 break;
1773         }
1774 }
1775 
1776 static int qeth_idx_activate_get_answer(struct qeth_channel *channel,
1777                 void (*idx_reply_cb)(struct qeth_channel *,
1778                         struct qeth_cmd_buffer *))
1779 {
1780         struct qeth_cmd_buffer *iob;
1781         unsigned long flags;
1782         int rc;
1783         struct qeth_card *card;
1784 
1785         QETH_DBF_TEXT(SETUP, 2, "idxanswr");
1786         card = CARD_FROM_CDEV(channel->ccwdev);
1787         iob = qeth_get_buffer(channel);
1788         if (!iob)
1789                 return -ENOMEM;
1790         iob->callback = idx_reply_cb;
1791         memcpy(&channel->ccw, READ_CCW, sizeof(struct ccw1));
1792         channel->ccw.count = QETH_BUFSIZE;
1793         channel->ccw.cda = (__u32) __pa(iob->data);
1794 
1795         wait_event(card->wait_q,
1796                    atomic_cmpxchg(&channel->irq_pending, 0, 1) == 0);
1797         QETH_DBF_TEXT(SETUP, 6, "noirqpnd");
1798         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1799         rc = ccw_device_start(channel->ccwdev,
1800                               &channel->ccw, (addr_t) iob, 0, 0);
1801         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1802 
1803         if (rc) {
1804                 QETH_DBF_MESSAGE(2, "Error2 in activating channel rc=%d\n", rc);
1805                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
1806                 atomic_set(&channel->irq_pending, 0);
1807                 wake_up(&card->wait_q);
1808                 return rc;
1809         }
1810         rc = wait_event_interruptible_timeout(card->wait_q,
1811                          channel->state == CH_STATE_UP, QETH_TIMEOUT);
1812         if (rc == -ERESTARTSYS)
1813                 return rc;
1814         if (channel->state != CH_STATE_UP) {
1815                 rc = -ETIME;
1816                 QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
1817                 qeth_clear_cmd_buffers(channel);
1818         } else
1819                 rc = 0;
1820         return rc;
1821 }
1822 
1823 static int qeth_idx_activate_channel(struct qeth_channel *channel,
1824                 void (*idx_reply_cb)(struct qeth_channel *,
1825                         struct qeth_cmd_buffer *))
1826 {
1827         struct qeth_card *card;
1828         struct qeth_cmd_buffer *iob;
1829         unsigned long flags;
1830         __u16 temp;
1831         __u8 tmp;
1832         int rc;
1833         struct ccw_dev_id temp_devid;
1834 
1835         card = CARD_FROM_CDEV(channel->ccwdev);
1836 
1837         QETH_DBF_TEXT(SETUP, 2, "idxactch");
1838 
1839         iob = qeth_get_buffer(channel);
1840         if (!iob)
1841                 return -ENOMEM;
1842         iob->callback = idx_reply_cb;
1843         memcpy(&channel->ccw, WRITE_CCW, sizeof(struct ccw1));
1844         channel->ccw.count = IDX_ACTIVATE_SIZE;
1845         channel->ccw.cda = (__u32) __pa(iob->data);
1846         if (channel == &card->write) {
1847                 memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE);
1848                 memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data),
1849                        &card->seqno.trans_hdr, QETH_SEQ_NO_LENGTH);
1850                 card->seqno.trans_hdr++;
1851         } else {
1852                 memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE);
1853                 memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data),
1854                        &card->seqno.trans_hdr, QETH_SEQ_NO_LENGTH);
1855         }
1856         tmp = ((__u8)card->info.portno) | 0x80;
1857         memcpy(QETH_IDX_ACT_PNO(iob->data), &tmp, 1);
1858         memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
1859                &card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH);
1860         memcpy(QETH_IDX_ACT_FUNC_LEVEL(iob->data),
1861                &card->info.func_level, sizeof(__u16));
1862         ccw_device_get_id(CARD_DDEV(card), &temp_devid);
1863         memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &temp_devid.devno, 2);
1864         temp = (card->info.cula << 8) + card->info.unit_addr2;
1865         memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &temp, 2);
1866 
1867         wait_event(card->wait_q,
1868                    atomic_cmpxchg(&channel->irq_pending, 0, 1) == 0);
1869         QETH_DBF_TEXT(SETUP, 6, "noirqpnd");
1870         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1871         rc = ccw_device_start(channel->ccwdev,
1872                               &channel->ccw, (addr_t) iob, 0, 0);
1873         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1874 
1875         if (rc) {
1876                 QETH_DBF_MESSAGE(2, "Error1 in activating channel. rc=%d\n",
1877                         rc);
1878                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1879                 atomic_set(&channel->irq_pending, 0);
1880                 wake_up(&card->wait_q);
1881                 return rc;
1882         }
1883         rc = wait_event_interruptible_timeout(card->wait_q,
1884                         channel->state == CH_STATE_ACTIVATING, QETH_TIMEOUT);
1885         if (rc == -ERESTARTSYS)
1886                 return rc;
1887         if (channel->state != CH_STATE_ACTIVATING) {
1888                 dev_warn(&channel->ccwdev->dev, "The qeth device driver"
1889                         " failed to recover an error on the device\n");
1890                 QETH_DBF_MESSAGE(2, "%s IDX activate timed out\n",
1891                         dev_name(&channel->ccwdev->dev));
1892                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", -ETIME);
1893                 qeth_clear_cmd_buffers(channel);
1894                 return -ETIME;
1895         }
1896         return qeth_idx_activate_get_answer(channel, idx_reply_cb);
1897 }
1898 
1899 static int qeth_peer_func_level(int level)
1900 {
1901         if ((level & 0xff) == 8)
1902                 return (level & 0xff) + 0x400;
1903         if (((level >> 8) & 3) == 1)
1904                 return (level & 0xff) + 0x200;
1905         return level;
1906 }
1907 
1908 static void qeth_idx_write_cb(struct qeth_channel *channel,
1909                 struct qeth_cmd_buffer *iob)
1910 {
1911         struct qeth_card *card;
1912         __u16 temp;
1913 
1914         QETH_DBF_TEXT(SETUP , 2, "idxwrcb");
1915 
1916         if (channel->state == CH_STATE_DOWN) {
1917                 channel->state = CH_STATE_ACTIVATING;
1918                 goto out;
1919         }
1920         card = CARD_FROM_CDEV(channel->ccwdev);
1921 
1922         if (!(QETH_IS_IDX_ACT_POS_REPLY(iob->data))) {
1923                 if (QETH_IDX_ACT_CAUSE_CODE(iob->data) == QETH_IDX_ACT_ERR_EXCL)
1924                         dev_err(&card->write.ccwdev->dev,
1925                                 "The adapter is used exclusively by another "
1926                                 "host\n");
1927                 else
1928                         QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on write channel:"
1929                                 " negative reply\n",
1930                                 dev_name(&card->write.ccwdev->dev));
1931                 goto out;
1932         }
1933         memcpy(&temp, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
1934         if ((temp & ~0x0100) != qeth_peer_func_level(card->info.func_level)) {
1935                 QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on write channel: "
1936                         "function level mismatch (sent: 0x%x, received: "
1937                         "0x%x)\n", dev_name(&card->write.ccwdev->dev),
1938                         card->info.func_level, temp);
1939                 goto out;
1940         }
1941         channel->state = CH_STATE_UP;
1942 out:
1943         qeth_release_buffer(channel, iob);
1944 }
1945 
1946 static void qeth_idx_read_cb(struct qeth_channel *channel,
1947                 struct qeth_cmd_buffer *iob)
1948 {
1949         struct qeth_card *card;
1950         __u16 temp;
1951 
1952         QETH_DBF_TEXT(SETUP , 2, "idxrdcb");
1953         if (channel->state == CH_STATE_DOWN) {
1954                 channel->state = CH_STATE_ACTIVATING;
1955                 goto out;
1956         }
1957 
1958         card = CARD_FROM_CDEV(channel->ccwdev);
1959         if (qeth_check_idx_response(card, iob->data))
1960                         goto out;
1961 
1962         if (!(QETH_IS_IDX_ACT_POS_REPLY(iob->data))) {
1963                 switch (QETH_IDX_ACT_CAUSE_CODE(iob->data)) {
1964                 case QETH_IDX_ACT_ERR_EXCL:
1965                         dev_err(&card->write.ccwdev->dev,
1966                                 "The adapter is used exclusively by another "
1967                                 "host\n");
1968                         break;
1969                 case QETH_IDX_ACT_ERR_AUTH:
1970                 case QETH_IDX_ACT_ERR_AUTH_USER:
1971                         dev_err(&card->read.ccwdev->dev,
1972                                 "Setting the device online failed because of "
1973                                 "insufficient authorization\n");
1974                         break;
1975                 default:
1976                         QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on read channel:"
1977                                 " negative reply\n",
1978                                 dev_name(&card->read.ccwdev->dev));
1979                 }
1980                 QETH_CARD_TEXT_(card, 2, "idxread%c",
1981                         QETH_IDX_ACT_CAUSE_CODE(iob->data));
1982                 goto out;
1983         }
1984 
1985 /**
1986  *  * temporary fix for microcode bug
1987  *   * to revert it,replace OR by AND
1988  *    */
1989         if ((!QETH_IDX_NO_PORTNAME_REQUIRED(iob->data)) ||
1990              (card->info.type == QETH_CARD_TYPE_OSD))
1991                 card->info.portname_required = 1;
1992 
1993         memcpy(&temp, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
1994         if (temp != qeth_peer_func_level(card->info.func_level)) {
1995                 QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on read channel: function "
1996                         "level mismatch (sent: 0x%x, received: 0x%x)\n",
1997                         dev_name(&card->read.ccwdev->dev),
1998                         card->info.func_level, temp);
1999                 goto out;
2000         }
2001         memcpy(&card->token.issuer_rm_r,
2002                QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2003                QETH_MPC_TOKEN_LENGTH);
2004         memcpy(&card->info.mcl_level[0],
2005                QETH_IDX_REPLY_LEVEL(iob->data), QETH_MCL_LENGTH);
2006         channel->state = CH_STATE_UP;
2007 out:
2008         qeth_release_buffer(channel, iob);
2009 }
2010 
2011 void qeth_prepare_control_data(struct qeth_card *card, int len,
2012                 struct qeth_cmd_buffer *iob)
2013 {
2014         qeth_setup_ccw(&card->write, iob->data, len);
2015         iob->callback = qeth_release_buffer;
2016 
2017         memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data),
2018                &card->seqno.trans_hdr, QETH_SEQ_NO_LENGTH);
2019         card->seqno.trans_hdr++;
2020         memcpy(QETH_PDU_HEADER_SEQ_NO(iob->data),
2021                &card->seqno.pdu_hdr, QETH_SEQ_NO_LENGTH);
2022         card->seqno.pdu_hdr++;
2023         memcpy(QETH_PDU_HEADER_ACK_SEQ_NO(iob->data),
2024                &card->seqno.pdu_hdr_ack, QETH_SEQ_NO_LENGTH);
2025         QETH_DBF_HEX(CTRL, 2, iob->data, QETH_DBF_CTRL_LEN);
2026 }
2027 EXPORT_SYMBOL_GPL(qeth_prepare_control_data);
2028 
2029 /**
2030  * qeth_send_control_data() -   send control command to the card
2031  * @card:                       qeth_card structure pointer
2032  * @len:                        size of the command buffer
2033  * @iob:                        qeth_cmd_buffer pointer
2034  * @reply_cb:                   callback function pointer
2035  * @cb_card:                    pointer to the qeth_card structure
2036  * @cb_reply:                   pointer to the qeth_reply structure
2037  * @cb_cmd:                     pointer to the original iob for non-IPA
2038  *                              commands, or to the qeth_ipa_cmd structure
2039  *                              for the IPA commands.
2040  * @reply_param:                private pointer passed to the callback
2041  *
2042  * Returns the value of the `return_code' field of the response
2043  * block returned from the hardware, or other error indication.
2044  * Value of zero indicates successful execution of the command.
2045  *
2046  * Callback function gets called one or more times, with cb_cmd
2047  * pointing to the response returned by the hardware. Callback
2048  * function must return non-zero if more reply blocks are expected,
2049  * and zero if the last or only reply block is received. Callback
2050  * function can get the value of the reply_param pointer from the
2051  * field 'param' of the structure qeth_reply.
2052  */
2053 
2054 int qeth_send_control_data(struct qeth_card *card, int len,
2055                 struct qeth_cmd_buffer *iob,
2056                 int (*reply_cb)(struct qeth_card *cb_card,
2057                                 struct qeth_reply *cb_reply,
2058                                 unsigned long cb_cmd),
2059                 void *reply_param)
2060 {
2061         int rc;
2062         unsigned long flags;
2063         struct qeth_reply *reply = NULL;
2064         unsigned long timeout, event_timeout;
2065         struct qeth_ipa_cmd *cmd;
2066 
2067         QETH_CARD_TEXT(card, 2, "sendctl");
2068 
2069         if (card->read_or_write_problem) {
2070                 qeth_release_buffer(iob->channel, iob);
2071                 return -EIO;
2072         }
2073         reply = qeth_alloc_reply(card);
2074         if (!reply) {
2075                 return -ENOMEM;
2076         }
2077         reply->callback = reply_cb;
2078         reply->param = reply_param;
2079         if (card->state == CARD_STATE_DOWN)
2080                 reply->seqno = QETH_IDX_COMMAND_SEQNO;
2081         else
2082                 reply->seqno = card->seqno.ipa++;
2083         init_waitqueue_head(&reply->wait_q);
2084         spin_lock_irqsave(&card->lock, flags);
2085         list_add_tail(&reply->list, &card->cmd_waiter_list);
2086         spin_unlock_irqrestore(&card->lock, flags);
2087         QETH_DBF_HEX(CTRL, 2, iob->data, QETH_DBF_CTRL_LEN);
2088 
2089         while (atomic_cmpxchg(&card->write.irq_pending, 0, 1)) ;
2090         qeth_prepare_control_data(card, len, iob);
2091 
2092         if (IS_IPA(iob->data))
2093                 event_timeout = QETH_IPA_TIMEOUT;
2094         else
2095                 event_timeout = QETH_TIMEOUT;
2096         timeout = jiffies + event_timeout;
2097 
2098         QETH_CARD_TEXT(card, 6, "noirqpnd");
2099         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
2100         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
2101                               (addr_t) iob, 0, 0);
2102         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
2103         if (rc) {
2104                 QETH_DBF_MESSAGE(2, "%s qeth_send_control_data: "
2105                         "ccw_device_start rc = %i\n",
2106                         dev_name(&card->write.ccwdev->dev), rc);
2107                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
2108                 spin_lock_irqsave(&card->lock, flags);
2109                 list_del_init(&reply->list);
2110                 qeth_put_reply(reply);
2111                 spin_unlock_irqrestore(&card->lock, flags);
2112                 qeth_release_buffer(iob->channel, iob);
2113                 atomic_set(&card->write.irq_pending, 0);
2114                 wake_up(&card->wait_q);
2115                 return rc;
2116         }
2117 
2118         /* we have only one long running ipassist, since we can ensure
2119            process context of this command we can sleep */
2120         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
2121         if ((cmd->hdr.command == IPA_CMD_SETIP) &&
2122             (cmd->hdr.prot_version == QETH_PROT_IPV4)) {
2123                 if (!wait_event_timeout(reply->wait_q,
2124                     atomic_read(&reply->received), event_timeout))
2125                         goto time_err;
2126         } else {
2127                 while (!atomic_read(&reply->received)) {
2128                         if (time_after(jiffies, timeout))
2129                                 goto time_err;
2130                         cpu_relax();
2131                 }
2132         }
2133 
2134         if (reply->rc == -EIO)
2135                 goto error;
2136         rc = reply->rc;
2137         qeth_put_reply(reply);
2138         return rc;
2139 
2140 time_err:
2141         reply->rc = -ETIME;
2142         spin_lock_irqsave(&reply->card->lock, flags);
2143         list_del_init(&reply->list);
2144         spin_unlock_irqrestore(&reply->card->lock, flags);
2145         atomic_inc(&reply->received);
2146 error:
2147         atomic_set(&card->write.irq_pending, 0);
2148         qeth_release_buffer(iob->channel, iob);
2149         card->write.buf_no = (card->write.buf_no + 1) % QETH_CMD_BUFFER_NO;
2150         rc = reply->rc;
2151         qeth_put_reply(reply);
2152         return rc;
2153 }
2154 EXPORT_SYMBOL_GPL(qeth_send_control_data);
2155 
2156 static int qeth_cm_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2157                 unsigned long data)
2158 {
2159         struct qeth_cmd_buffer *iob;
2160 
2161         QETH_DBF_TEXT(SETUP, 2, "cmenblcb");
2162 
2163         iob = (struct qeth_cmd_buffer *) data;
2164         memcpy(&card->token.cm_filter_r,
2165                QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data),
2166                QETH_MPC_TOKEN_LENGTH);
2167         QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
2168         return 0;
2169 }
2170 
2171 static int qeth_cm_enable(struct qeth_card *card)
2172 {
2173         int rc;
2174         struct qeth_cmd_buffer *iob;
2175 
2176         QETH_DBF_TEXT(SETUP, 2, "cmenable");
2177 
2178         iob = qeth_wait_for_buffer(&card->write);
2179         memcpy(iob->data, CM_ENABLE, CM_ENABLE_SIZE);
2180         memcpy(QETH_CM_ENABLE_ISSUER_RM_TOKEN(iob->data),
2181                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2182         memcpy(QETH_CM_ENABLE_FILTER_TOKEN(iob->data),
2183                &card->token.cm_filter_w, QETH_MPC_TOKEN_LENGTH);
2184 
2185         rc = qeth_send_control_data(card, CM_ENABLE_SIZE, iob,
2186                                     qeth_cm_enable_cb, NULL);
2187         return rc;
2188 }
2189 
2190 static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2191                 unsigned long data)
2192 {
2193 
2194         struct qeth_cmd_buffer *iob;
2195 
2196         QETH_DBF_TEXT(SETUP, 2, "cmsetpcb");
2197 
2198         iob = (struct qeth_cmd_buffer *) data;
2199         memcpy(&card->token.cm_connection_r,
2200                QETH_CM_SETUP_RESP_DEST_ADDR(iob->data),
2201                QETH_MPC_TOKEN_LENGTH);
2202         QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
2203         return 0;
2204 }
2205 
2206 static int qeth_cm_setup(struct qeth_card *card)
2207 {
2208         int rc;
2209         struct qeth_cmd_buffer *iob;
2210 
2211         QETH_DBF_TEXT(SETUP, 2, "cmsetup");
2212 
2213         iob = qeth_wait_for_buffer(&card->write);
2214         memcpy(iob->data, CM_SETUP, CM_SETUP_SIZE);
2215         memcpy(QETH_CM_SETUP_DEST_ADDR(iob->data),
2216                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2217         memcpy(QETH_CM_SETUP_CONNECTION_TOKEN(iob->data),
2218                &card->token.cm_connection_w, QETH_MPC_TOKEN_LENGTH);
2219         memcpy(QETH_CM_SETUP_FILTER_TOKEN(iob->data),
2220                &card->token.cm_filter_r, QETH_MPC_TOKEN_LENGTH);
2221         rc = qeth_send_control_data(card, CM_SETUP_SIZE, iob,
2222                                     qeth_cm_setup_cb, NULL);
2223         return rc;
2224 
2225 }
2226 
2227 static inline int qeth_get_initial_mtu_for_card(struct qeth_card *card)
2228 {
2229         switch (card->info.type) {
2230         case QETH_CARD_TYPE_UNKNOWN:
2231                 return 1500;
2232         case QETH_CARD_TYPE_IQD:
2233                 return card->info.max_mtu;
2234         case QETH_CARD_TYPE_OSD:
2235                 switch (card->info.link_type) {
2236                 case QETH_LINK_TYPE_HSTR:
2237                 case QETH_LINK_TYPE_LANE_TR:
2238                         return 2000;
2239                 default:
2240                         return card->options.layer2 ? 1500 : 1492;
2241                 }
2242         case QETH_CARD_TYPE_OSM:
2243         case QETH_CARD_TYPE_OSX:
2244                 return card->options.layer2 ? 1500 : 1492;
2245         default:
2246                 return 1500;
2247         }
2248 }
2249 
2250 static inline int qeth_get_mtu_outof_framesize(int framesize)
2251 {
2252         switch (framesize) {
2253         case 0x4000:
2254                 return 8192;
2255         case 0x6000:
2256                 return 16384;
2257         case 0xa000:
2258                 return 32768;
2259         case 0xffff:
2260                 return 57344;
2261         default:
2262                 return 0;
2263         }
2264 }
2265 
2266 static inline int qeth_mtu_is_valid(struct qeth_card *card, int mtu)
2267 {
2268         switch (card->info.type) {
2269         case QETH_CARD_TYPE_OSD:
2270         case QETH_CARD_TYPE_OSM:
2271         case QETH_CARD_TYPE_OSX:
2272         case QETH_CARD_TYPE_IQD:
2273                 return ((mtu >= 576) &&
2274                         (mtu <= card->info.max_mtu));
2275         case QETH_CARD_TYPE_OSN:
2276         case QETH_CARD_TYPE_UNKNOWN:
2277         default:
2278                 return 1;
2279         }
2280 }
2281 
2282 static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2283                 unsigned long data)
2284 {
2285 
2286         __u16 mtu, framesize;
2287         __u16 len;
2288         __u8 link_type;
2289         struct qeth_cmd_buffer *iob;
2290 
2291         QETH_DBF_TEXT(SETUP, 2, "ulpenacb");
2292 
2293         iob = (struct qeth_cmd_buffer *) data;
2294         memcpy(&card->token.ulp_filter_r,
2295                QETH_ULP_ENABLE_RESP_FILTER_TOKEN(iob->data),
2296                QETH_MPC_TOKEN_LENGTH);
2297         if (card->info.type == QETH_CARD_TYPE_IQD) {
2298                 memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2);
2299                 mtu = qeth_get_mtu_outof_framesize(framesize);
2300                 if (!mtu) {
2301                         iob->rc = -EINVAL;
2302                         QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
2303                         return 0;
2304                 }
2305                 if (card->info.initial_mtu && (card->info.initial_mtu != mtu)) {
2306                         /* frame size has changed */
2307                         if (card->dev &&
2308                             ((card->dev->mtu == card->info.initial_mtu) ||
2309                              (card->dev->mtu > mtu)))
2310                                 card->dev->mtu = mtu;
2311                         qeth_free_qdio_buffers(card);
2312                 }
2313                 card->info.initial_mtu = mtu;
2314                 card->info.max_mtu = mtu;
2315                 card->qdio.in_buf_size = mtu + 2 * PAGE_SIZE;
2316         } else {
2317                 card->info.max_mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(
2318                         iob->data);
2319                 card->info.initial_mtu = min(card->info.max_mtu,
2320                                         qeth_get_initial_mtu_for_card(card));
2321                 card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
2322         }
2323 
2324         memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2);
2325         if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) {
2326                 memcpy(&link_type,
2327                        QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1);
2328                 card->info.link_type = link_type;
2329         } else
2330                 card->info.link_type = 0;
2331         QETH_DBF_TEXT_(SETUP, 2, "link%d", card->info.link_type);
2332         QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
2333         return 0;
2334 }
2335 
2336 static int qeth_ulp_enable(struct qeth_card *card)
2337 {
2338         int rc;
2339         char prot_type;
2340         struct qeth_cmd_buffer *iob;
2341 
2342         /*FIXME: trace view callbacks*/
2343         QETH_DBF_TEXT(SETUP, 2, "ulpenabl");
2344 
2345         iob = qeth_wait_for_buffer(&card->write);
2346         memcpy(iob->data, ULP_ENABLE, ULP_ENABLE_SIZE);
2347 
2348         *(QETH_ULP_ENABLE_LINKNUM(iob->data)) =
2349                 (__u8) card->info.portno;
2350         if (card->options.layer2)
2351                 if (card->info.type == QETH_CARD_TYPE_OSN)
2352                         prot_type = QETH_PROT_OSN2;
2353                 else
2354                         prot_type = QETH_PROT_LAYER2;
2355         else
2356                 prot_type = QETH_PROT_TCPIP;
2357 
2358         memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1);
2359         memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data),
2360                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2361         memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data),
2362                &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH);
2363         memcpy(QETH_ULP_ENABLE_PORTNAME_AND_LL(iob->data),
2364                card->info.portname, 9);
2365         rc = qeth_send_control_data(card, ULP_ENABLE_SIZE, iob,
2366                                     qeth_ulp_enable_cb, NULL);
2367         return rc;
2368 
2369 }
2370 
2371 static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2372                 unsigned long data)
2373 {
2374         struct qeth_cmd_buffer *iob;
2375 
2376         QETH_DBF_TEXT(SETUP, 2, "ulpstpcb");
2377 
2378         iob = (struct qeth_cmd_buffer *) data;
2379         memcpy(&card->token.ulp_connection_r,
2380                QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2381                QETH_MPC_TOKEN_LENGTH);
2382         if (!strncmp("00S", QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2383                      3)) {
2384                 QETH_DBF_TEXT(SETUP, 2, "olmlimit");
2385                 dev_err(&card->gdev->dev, "A connection could not be "
2386                         "established because of an OLM limit\n");
2387                 iob->rc = -EMLINK;
2388         }
2389         QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
2390         return 0;
2391 }
2392 
2393 static int qeth_ulp_setup(struct qeth_card *card)
2394 {
2395         int rc;
2396         __u16 temp;
2397         struct qeth_cmd_buffer *iob;
2398         struct ccw_dev_id dev_id;
2399 
2400         QETH_DBF_TEXT(SETUP, 2, "ulpsetup");
2401 
2402         iob = qeth_wait_for_buffer(&card->write);
2403         memcpy(iob->data, ULP_SETUP, ULP_SETUP_SIZE);
2404 
2405         memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data),
2406                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2407         memcpy(QETH_ULP_SETUP_CONNECTION_TOKEN(iob->data),
2408                &card->token.ulp_connection_w, QETH_MPC_TOKEN_LENGTH);
2409         memcpy(QETH_ULP_SETUP_FILTER_TOKEN(iob->data),
2410                &card->token.ulp_filter_r, QETH_MPC_TOKEN_LENGTH);
2411 
2412         ccw_device_get_id(CARD_DDEV(card), &dev_id);
2413         memcpy(QETH_ULP_SETUP_CUA(iob->data), &dev_id.devno, 2);
2414         temp = (card->info.cula << 8) + card->info.unit_addr2;
2415         memcpy(QETH_ULP_SETUP_REAL_DEVADDR(iob->data), &temp, 2);
2416         rc = qeth_send_control_data(card, ULP_SETUP_SIZE, iob,
2417                                     qeth_ulp_setup_cb, NULL);
2418         return rc;
2419 }
2420 
2421 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *q, int bidx)
2422 {
2423         int rc;
2424         struct qeth_qdio_out_buffer *newbuf;
2425 
2426         rc = 0;
2427         newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, GFP_ATOMIC);
2428         if (!newbuf) {
2429                 rc = -ENOMEM;
2430                 goto out;
2431         }
2432         newbuf->buffer = q->qdio_bufs[bidx];
2433         skb_queue_head_init(&newbuf->skb_list);
2434         lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key);
2435         newbuf->q = q;
2436         newbuf->aob = NULL;
2437         newbuf->next_pending = q->bufs[bidx];
2438         atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY);
2439         q->bufs[bidx] = newbuf;
2440         if (q->bufstates) {
2441                 q->bufstates[bidx].user = newbuf;
2442                 QETH_CARD_TEXT_(q->card, 2, "nbs%d", bidx);
2443                 QETH_CARD_TEXT_(q->card, 2, "%lx", (long) newbuf);
2444                 QETH_CARD_TEXT_(q->card, 2, "%lx",
2445                                 (long) newbuf->next_pending);
2446         }
2447 out:
2448         return rc;
2449 }
2450 
2451 static void qeth_free_qdio_out_buf(struct qeth_qdio_out_q *q)
2452 {
2453         if (!q)
2454                 return;
2455 
2456         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2457         kfree(q);
2458 }
2459 
2460 static struct qeth_qdio_out_q *qeth_alloc_qdio_out_buf(void)
2461 {
2462         struct qeth_qdio_out_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
2463 
2464         if (!q)
2465                 return NULL;
2466 
2467         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
2468                 kfree(q);
2469                 return NULL;
2470         }
2471         return q;
2472 }
2473 
2474 static int qeth_alloc_qdio_buffers(struct qeth_card *card)
2475 {
2476         int i, j;
2477 
2478         QETH_DBF_TEXT(SETUP, 2, "allcqdbf");
2479 
2480         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED,
2481                 QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED)
2482                 return 0;
2483 
2484         QETH_DBF_TEXT(SETUP, 2, "inq");
2485         card->qdio.in_q = qeth_alloc_qdio_queue();
2486         if (!card->qdio.in_q)
2487                 goto out_nomem;
2488 
2489         /* inbound buffer pool */
2490         if (qeth_alloc_buffer_pool(card))
2491                 goto out_freeinq;
2492 
2493         /* outbound */
2494         card->qdio.out_qs =
2495                 kzalloc(card->qdio.no_out_queues *
2496                         sizeof(struct qeth_qdio_out_q *), GFP_KERNEL);
2497         if (!card->qdio.out_qs)
2498                 goto out_freepool;
2499         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2500                 card->qdio.out_qs[i] = qeth_alloc_qdio_out_buf();
2501                 if (!card->qdio.out_qs[i])
2502                         goto out_freeoutq;
2503                 QETH_DBF_TEXT_(SETUP, 2, "outq %i", i);
2504                 QETH_DBF_HEX(SETUP, 2, &card->qdio.out_qs[i], sizeof(void *));
2505                 card->qdio.out_qs[i]->queue_no = i;
2506                 /* give outbound qeth_qdio_buffers their qdio_buffers */
2507                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2508                         WARN_ON(card->qdio.out_qs[i]->bufs[j] != NULL);
2509                         if (qeth_init_qdio_out_buf(card->qdio.out_qs[i], j))
2510                                 goto out_freeoutqbufs;
2511                 }
2512         }
2513 
2514         /* completion */
2515         if (qeth_alloc_cq(card))
2516                 goto out_freeoutq;
2517 
2518         return 0;
2519 
2520 out_freeoutqbufs:
2521         while (j > 0) {
2522                 --j;
2523                 kmem_cache_free(qeth_qdio_outbuf_cache,
2524                                 card->qdio.out_qs[i]->bufs[j]);
2525                 card->qdio.out_qs[i]->bufs[j] = NULL;
2526         }
2527 out_freeoutq:
2528         while (i > 0) {
2529                 qeth_free_qdio_out_buf(card->qdio.out_qs[--i]);
2530                 qeth_clear_outq_buffers(card->qdio.out_qs[i], 1);
2531         }
2532         kfree(card->qdio.out_qs);
2533         card->qdio.out_qs = NULL;
2534 out_freepool:
2535         qeth_free_buffer_pool(card);
2536 out_freeinq:
2537         qeth_free_qdio_queue(card->qdio.in_q);
2538         card->qdio.in_q = NULL;
2539 out_nomem:
2540         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
2541         return -ENOMEM;
2542 }
2543 
2544 static void qeth_free_qdio_buffers(struct qeth_card *card)
2545 {
2546         int i, j;
2547 
2548         if (atomic_xchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED) ==
2549                 QETH_QDIO_UNINITIALIZED)
2550                 return;
2551 
2552         qeth_free_cq(card);
2553         cancel_delayed_work_sync(&card->buffer_reclaim_work);
2554         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2555                 if (card->qdio.in_q->bufs[j].rx_skb)
2556                         dev_kfree_skb_any(card->qdio.in_q->bufs[j].rx_skb);
2557         }
2558         qeth_free_qdio_queue(card->qdio.in_q);
2559         card->qdio.in_q = NULL;
2560         /* inbound buffer pool */
2561         qeth_free_buffer_pool(card);
2562         /* free outbound qdio_qs */
2563         if (card->qdio.out_qs) {
2564                 for (i = 0; i < card->qdio.no_out_queues; ++i) {
2565                         qeth_clear_outq_buffers(card->qdio.out_qs[i], 1);
2566                         qeth_free_qdio_out_buf(card->qdio.out_qs[i]);
2567                 }
2568                 kfree(card->qdio.out_qs);
2569                 card->qdio.out_qs = NULL;
2570         }
2571 }
2572 
2573 static void qeth_create_qib_param_field(struct qeth_card *card,
2574                 char *param_field)
2575 {
2576 
2577         param_field[0] = _ascebc['P'];
2578         param_field[1] = _ascebc['C'];
2579         param_field[2] = _ascebc['I'];
2580         param_field[3] = _ascebc['T'];
2581         *((unsigned int *) (&param_field[4])) = QETH_PCI_THRESHOLD_A(card);
2582         *((unsigned int *) (&param_field[8])) = QETH_PCI_THRESHOLD_B(card);
2583         *((unsigned int *) (&param_field[12])) = QETH_PCI_TIMER_VALUE(card);
2584 }
2585 
2586 static void qeth_create_qib_param_field_blkt(struct qeth_card *card,
2587                 char *param_field)
2588 {
2589         param_field[16] = _ascebc['B'];
2590         param_field[17] = _ascebc['L'];
2591         param_field[18] = _ascebc['K'];
2592         param_field[19] = _ascebc['T'];
2593         *((unsigned int *) (&param_field[20])) = card->info.blkt.time_total;
2594         *((unsigned int *) (&param_field[24])) = card->info.blkt.inter_packet;
2595         *((unsigned int *) (&param_field[28])) =
2596                 card->info.blkt.inter_packet_jumbo;
2597 }
2598 
2599 static int qeth_qdio_activate(struct qeth_card *card)
2600 {
2601         QETH_DBF_TEXT(SETUP, 3, "qdioact");
2602         return qdio_activate(CARD_DDEV(card));
2603 }
2604 
2605 static int qeth_dm_act(struct qeth_card *card)
2606 {
2607         int rc;
2608         struct qeth_cmd_buffer *iob;
2609 
2610         QETH_DBF_TEXT(SETUP, 2, "dmact");
2611 
2612         iob = qeth_wait_for_buffer(&card->write);
2613         memcpy(iob->data, DM_ACT, DM_ACT_SIZE);
2614 
2615         memcpy(QETH_DM_ACT_DEST_ADDR(iob->data),
2616                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2617         memcpy(QETH_DM_ACT_CONNECTION_TOKEN(iob->data),
2618                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2619         rc = qeth_send_control_data(card, DM_ACT_SIZE, iob, NULL, NULL);
2620         return rc;
2621 }
2622 
2623 static int qeth_mpc_initialize(struct qeth_card *card)
2624 {
2625         int rc;
2626 
2627         QETH_DBF_TEXT(SETUP, 2, "mpcinit");
2628 
2629         rc = qeth_issue_next_read(card);
2630         if (rc) {
2631                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
2632                 return rc;
2633         }
2634         rc = qeth_cm_enable(card);
2635         if (rc) {
2636                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
2637                 goto out_qdio;
2638         }
2639         rc = qeth_cm_setup(card);
2640         if (rc) {
2641                 QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
2642                 goto out_qdio;
2643         }
2644         rc = qeth_ulp_enable(card);
2645         if (rc) {
2646                 QETH_DBF_TEXT_(SETUP, 2, "4err%d", rc);
2647                 goto out_qdio;
2648         }
2649         rc = qeth_ulp_setup(card);
2650         if (rc) {
2651                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
2652                 goto out_qdio;
2653         }
2654         rc = qeth_alloc_qdio_buffers(card);
2655         if (rc) {
2656                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
2657                 goto out_qdio;
2658         }
2659         rc = qeth_qdio_establish(card);
2660         if (rc) {
2661                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
2662                 qeth_free_qdio_buffers(card);
2663                 goto out_qdio;
2664         }
2665         rc = qeth_qdio_activate(card);
2666         if (rc) {
2667                 QETH_DBF_TEXT_(SETUP, 2, "7err%d", rc);
2668                 goto out_qdio;
2669         }
2670         rc = qeth_dm_act(card);
2671         if (rc) {
2672                 QETH_DBF_TEXT_(SETUP, 2, "8err%d", rc);
2673                 goto out_qdio;
2674         }
2675 
2676         return 0;
2677 out_qdio:
2678         qeth_qdio_clear_card(card, card->info.type != QETH_CARD_TYPE_IQD);
2679         qdio_free(CARD_DDEV(card));
2680         return rc;
2681 }
2682 
2683 static void qeth_print_status_with_portname(struct qeth_card *card)
2684 {
2685         char dbf_text[15];
2686         int i;
2687 
2688         sprintf(dbf_text, "%s", card->info.portname + 1);
2689         for (i = 0; i < 8; i++)
2690                 dbf_text[i] =
2691                         (char) _ebcasc[(__u8) dbf_text[i]];
2692         dbf_text[8] = 0;
2693         dev_info(&card->gdev->dev, "Device is a%s card%s%s%s\n"
2694                "with link type %s (portname: %s)\n",
2695                qeth_get_cardname(card),
2696                (card->info.mcl_level[0]) ? " (level: " : "",
2697                (card->info.mcl_level[0]) ? card->info.mcl_level : "",
2698                (card->info.mcl_level[0]) ? ")" : "",
2699                qeth_get_cardname_short(card),
2700                dbf_text);
2701 
2702 }
2703 
2704 static void qeth_print_status_no_portname(struct qeth_card *card)
2705 {
2706         if (card->info.portname[0])
2707                 dev_info(&card->gdev->dev, "Device is a%s "
2708                        "card%s%s%s\nwith link type %s "
2709                        "(no portname needed by interface).\n",
2710                        qeth_get_cardname(card),
2711                        (card->info.mcl_level[0]) ? " (level: " : "",
2712                        (card->info.mcl_level[0]) ? card->info.mcl_level : "",
2713                        (card->info.mcl_level[0]) ? ")" : "",
2714                        qeth_get_cardname_short(card));
2715         else
2716                 dev_info(&card->gdev->dev, "Device is a%s "
2717                        "card%s%s%s\nwith link type %s.\n",
2718                        qeth_get_cardname(card),
2719                        (card->info.mcl_level[0]) ? " (level: " : "",
2720                        (card->info.mcl_level[0]) ? card->info.mcl_level : "",
2721                        (card->info.mcl_level[0]) ? ")" : "",
2722                        qeth_get_cardname_short(card));
2723 }
2724 
2725 void qeth_print_status_message(struct qeth_card *card)
2726 {
2727         switch (card->info.type) {
2728         case QETH_CARD_TYPE_OSD:
2729         case QETH_CARD_TYPE_OSM:
2730         case QETH_CARD_TYPE_OSX:
2731                 /* VM will use a non-zero first character
2732                  * to indicate a HiperSockets like reporting
2733                  * of the level OSA sets the first character to zero
2734                  * */
2735                 if (!card->info.mcl_level[0]) {
2736                         sprintf(card->info.mcl_level, "%02x%02x",
2737                                 card->info.mcl_level[2],
2738                                 card->info.mcl_level[3]);
2739 
2740                         card->info.mcl_level[QETH_MCL_LENGTH] = 0;
2741                         break;
2742                 }
2743                 /* fallthrough */
2744         case QETH_CARD_TYPE_IQD:
2745                 if ((card->info.guestlan) ||
2746                     (card->info.mcl_level[0] & 0x80)) {
2747                         card->info.mcl_level[0] = (char) _ebcasc[(__u8)
2748                                 card->info.mcl_level[0]];
2749                         card->info.mcl_level[1] = (char) _ebcasc[(__u8)
2750                                 card->info.mcl_level[1]];
2751                         card->info.mcl_level[2] = (char) _ebcasc[(__u8)
2752                                 card->info.mcl_level[2]];
2753                         card->info.mcl_level[3] = (char) _ebcasc[(__u8)
2754                                 card->info.mcl_level[3]];
2755                         card->info.mcl_level[QETH_MCL_LENGTH] = 0;
2756                 }
2757                 break;
2758         default:
2759                 memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1);
2760         }
2761         if (card->info.portname_required)
2762                 qeth_print_status_with_portname(card);
2763         else
2764                 qeth_print_status_no_portname(card);
2765 }
2766 EXPORT_SYMBOL_GPL(qeth_print_status_message);
2767 
2768 static void qeth_initialize_working_pool_list(struct qeth_card *card)
2769 {
2770         struct qeth_buffer_pool_entry *entry;
2771 
2772         QETH_CARD_TEXT(card, 5, "inwrklst");
2773 
2774         list_for_each_entry(entry,
2775                             &card->qdio.init_pool.entry_list, init_list) {
2776                 qeth_put_buffer_pool_entry(card, entry);
2777         }
2778 }
2779 
2780 static inline struct qeth_buffer_pool_entry *qeth_find_free_buffer_pool_entry(
2781                 struct qeth_card *card)
2782 {
2783         struct list_head *plh;
2784         struct qeth_buffer_pool_entry *entry;
2785         int i, free;
2786         struct page *page;
2787 
2788         if (list_empty(&card->qdio.in_buf_pool.entry_list))
2789                 return NULL;
2790 
2791         list_for_each(plh, &card->qdio.in_buf_pool.entry_list) {
2792                 entry = list_entry(plh, struct qeth_buffer_pool_entry, list);
2793                 free = 1;
2794                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2795                         if (page_count(virt_to_page(entry->elements[i])) > 1) {
2796                                 free = 0;
2797                                 break;
2798                         }
2799                 }
2800                 if (free) {
2801                         list_del_init(&entry->list);
2802                         return entry;
2803                 }
2804         }
2805 
2806         /* no free buffer in pool so take first one and swap pages */
2807         entry = list_entry(card->qdio.in_buf_pool.entry_list.next,
2808                         struct qeth_buffer_pool_entry, list);
2809         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2810                 if (page_count(virt_to_page(entry->elements[i])) > 1) {
2811                         page = alloc_page(GFP_ATOMIC);
2812                         if (!page) {
2813                                 return NULL;
2814                         } else {
2815                                 free_page((unsigned long)entry->elements[i]);
2816                                 entry->elements[i] = page_address(page);
2817                                 if (card->options.performance_stats)
2818                                         card->perf_stats.sg_alloc_page_rx++;
2819                         }
2820                 }
2821         }
2822         list_del_init(&entry->list);
2823         return entry;
2824 }
2825 
2826 static int qeth_init_input_buffer(struct qeth_card *card,
2827                 struct qeth_qdio_buffer *buf)
2828 {
2829         struct qeth_buffer_pool_entry *pool_entry;
2830         int i;
2831 
2832         if ((card->options.cq == QETH_CQ_ENABLED) && (!buf->rx_skb)) {
2833                 buf->rx_skb = dev_alloc_skb(QETH_RX_PULL_LEN + ETH_HLEN);
2834                 if (!buf->rx_skb)
2835                         return 1;
2836         }
2837 
2838         pool_entry = qeth_find_free_buffer_pool_entry(card);
2839         if (!pool_entry)
2840                 return 1;
2841 
2842         /*
2843          * since the buffer is accessed only from the input_tasklet
2844          * there shouldn't be a need to synchronize; also, since we use
2845          * the QETH_IN_BUF_REQUEUE_THRESHOLD we should never run  out off
2846          * buffers
2847          */
2848 
2849         buf->pool_entry = pool_entry;
2850         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2851                 buf->buffer->element[i].length = PAGE_SIZE;
2852                 buf->buffer->element[i].addr =  pool_entry->elements[i];
2853                 if (i == QETH_MAX_BUFFER_ELEMENTS(card) - 1)
2854                         buf->buffer->element[i].eflags = SBAL_EFLAGS_LAST_ENTRY;
2855                 else
2856                         buf->buffer->element[i].eflags = 0;
2857                 buf->buffer->element[i].sflags = 0;
2858         }
2859         return 0;
2860 }
2861 
2862 int qeth_init_qdio_queues(struct qeth_card *card)
2863 {
2864         int i, j;
2865         int rc;
2866 
2867         QETH_DBF_TEXT(SETUP, 2, "initqdqs");
2868 
2869         /* inbound queue */
2870         qdio_reset_buffers(card->qdio.in_q->qdio_bufs,
2871                            QDIO_MAX_BUFFERS_PER_Q);
2872         qeth_initialize_working_pool_list(card);
2873         /*give only as many buffers to hardware as we have buffer pool entries*/
2874         for (i = 0; i < card->qdio.in_buf_pool.buf_count - 1; ++i)
2875                 qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]);
2876         card->qdio.in_q->next_buf_to_init =
2877                 card->qdio.in_buf_pool.buf_count - 1;
2878         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0, 0,
2879                      card->qdio.in_buf_pool.buf_count - 1);
2880         if (rc) {
2881                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
2882                 return rc;
2883         }
2884 
2885         /* completion */
2886         rc = qeth_cq_init(card);
2887         if (rc) {
2888                 return rc;
2889         }
2890 
2891         /* outbound queue */
2892         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2893                 qdio_reset_buffers(card->qdio.out_qs[i]->qdio_bufs,
2894                                    QDIO_MAX_BUFFERS_PER_Q);
2895                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2896                         qeth_clear_output_buffer(card->qdio.out_qs[i],
2897                                         card->qdio.out_qs[i]->bufs[j],
2898                                         QETH_QDIO_BUF_EMPTY);
2899                 }
2900                 card->qdio.out_qs[i]->card = card;
2901                 card->qdio.out_qs[i]->next_buf_to_fill = 0;
2902                 card->qdio.out_qs[i]->do_pack = 0;
2903                 atomic_set(&card->qdio.out_qs[i]->used_buffers, 0);
2904                 atomic_set(&card->qdio.out_qs[i]->set_pci_flags_count, 0);
2905                 atomic_set(&card->qdio.out_qs[i]->state,
2906                            QETH_OUT_Q_UNLOCKED);
2907         }
2908         return 0;
2909 }
2910 EXPORT_SYMBOL_GPL(qeth_init_qdio_queues);
2911 
2912 static inline __u8 qeth_get_ipa_adp_type(enum qeth_link_types link_type)
2913 {
2914         switch (link_type) {
2915         case QETH_LINK_TYPE_HSTR:
2916                 return 2;
2917         default:
2918                 return 1;
2919         }
2920 }
2921 
2922 static void qeth_fill_ipacmd_header(struct qeth_card *card,
2923                 struct qeth_ipa_cmd *cmd, __u8 command,
2924                 enum qeth_prot_versions prot)
2925 {
2926         memset(cmd, 0, sizeof(struct qeth_ipa_cmd));
2927         cmd->hdr.command = command;
2928         cmd->hdr.initiator = IPA_CMD_INITIATOR_HOST;
2929         cmd->hdr.seqno = card->seqno.ipa;
2930         cmd->hdr.adapter_type = qeth_get_ipa_adp_type(card->info.link_type);
2931         cmd->hdr.rel_adapter_no = (__u8) card->info.portno;
2932         if (card->options.layer2)
2933                 cmd->hdr.prim_version_no = 2;
2934         else
2935                 cmd->hdr.prim_version_no = 1;
2936         cmd->hdr.param_count = 1;
2937         cmd->hdr.prot_version = prot;
2938         cmd->hdr.ipa_supported = 0;
2939         cmd->hdr.ipa_enabled = 0;
2940 }
2941 
2942 struct qeth_cmd_buffer *qeth_get_ipacmd_buffer(struct qeth_card *card,
2943                 enum qeth_ipa_cmds ipacmd, enum qeth_prot_versions prot)
2944 {
2945         struct qeth_cmd_buffer *iob;
2946         struct qeth_ipa_cmd *cmd;
2947 
2948         iob = qeth_get_buffer(&card->write);
2949         if (iob) {
2950                 cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
2951                 qeth_fill_ipacmd_header(card, cmd, ipacmd, prot);
2952         } else {
2953                 dev_warn(&card->gdev->dev,
2954                          "The qeth driver ran out of channel command buffers\n");
2955                 QETH_DBF_MESSAGE(1, "%s The qeth driver ran out of channel command buffers",
2956                                  dev_name(&card->gdev->dev));
2957         }
2958 
2959         return iob;
2960 }
2961 EXPORT_SYMBOL_GPL(qeth_get_ipacmd_buffer);
2962 
2963 void qeth_prepare_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
2964                 char prot_type)
2965 {
2966         memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
2967         memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1);
2968         memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
2969                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2970 }
2971 EXPORT_SYMBOL_GPL(qeth_prepare_ipa_cmd);
2972 
2973 /**
2974  * qeth_send_ipa_cmd() - send an IPA command
2975  *
2976  * See qeth_send_control_data() for explanation of the arguments.
2977  */
2978 
2979 int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
2980                 int (*reply_cb)(struct qeth_card *, struct qeth_reply*,
2981                         unsigned long),
2982                 void *reply_param)
2983 {
2984         int rc;
2985         char prot_type;
2986 
2987         QETH_CARD_TEXT(card, 4, "sendipa");
2988 
2989         if (card->options.layer2)
2990                 if (card->info.type == QETH_CARD_TYPE_OSN)
2991                         prot_type = QETH_PROT_OSN2;
2992                 else
2993                         prot_type = QETH_PROT_LAYER2;
2994         else
2995                 prot_type = QETH_PROT_TCPIP;
2996         qeth_prepare_ipa_cmd(card, iob, prot_type);
2997         rc = qeth_send_control_data(card, IPA_CMD_LENGTH,
2998                                                 iob, reply_cb, reply_param);
2999         if (rc == -ETIME) {
3000                 qeth_clear_ipacmd_list(card);
3001                 qeth_schedule_recovery(card);
3002         }
3003         return rc;
3004 }
3005 EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd);
3006 
3007 int qeth_send_startlan(struct qeth_card *card)
3008 {
3009         int rc;
3010         struct qeth_cmd_buffer *iob;
3011 
3012         QETH_DBF_TEXT(SETUP, 2, "strtlan");
3013 
3014         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_STARTLAN, 0);
3015         if (!iob)
3016                 return -ENOMEM;
3017         rc = qeth_send_ipa_cmd(card, iob, NULL, NULL);
3018         return rc;
3019 }
3020 EXPORT_SYMBOL_GPL(qeth_send_startlan);
3021 
3022 static int qeth_default_setadapterparms_cb(struct qeth_card *card,
3023                 struct qeth_reply *reply, unsigned long data)
3024 {
3025         struct qeth_ipa_cmd *cmd;
3026 
3027         QETH_CARD_TEXT(card, 4, "defadpcb");
3028 
3029         cmd = (struct qeth_ipa_cmd *) data;
3030         if (cmd->hdr.return_code == 0)
3031                 cmd->hdr.return_code =
3032                         cmd->data.setadapterparms.hdr.return_code;
3033         return 0;
3034 }
3035 
3036 static int qeth_query_setadapterparms_cb(struct qeth_card *card,
3037                 struct qeth_reply *reply, unsigned long data)
3038 {
3039         struct qeth_ipa_cmd *cmd;
3040 
3041         QETH_CARD_TEXT(card, 3, "quyadpcb");
3042 
3043         cmd = (struct qeth_ipa_cmd *) data;
3044         if (cmd->data.setadapterparms.data.query_cmds_supp.lan_type & 0x7f) {
3045                 card->info.link_type =
3046                       cmd->data.setadapterparms.data.query_cmds_supp.lan_type;
3047                 QETH_DBF_TEXT_(SETUP, 2, "lnk %d", card->info.link_type);
3048         }
3049         card->options.adp.supported_funcs =
3050                 cmd->data.setadapterparms.data.query_cmds_supp.supported_cmds;
3051         return qeth_default_setadapterparms_cb(card, reply, (unsigned long)cmd);
3052 }
3053 
3054 static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card,
3055                 __u32 command, __u32 cmdlen)
3056 {
3057         struct qeth_cmd_buffer *iob;
3058         struct qeth_ipa_cmd *cmd;
3059 
3060         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SETADAPTERPARMS,
3061                                      QETH_PROT_IPV4);
3062         if (iob) {
3063                 cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
3064                 cmd->data.setadapterparms.hdr.cmdlength = cmdlen;
3065                 cmd->data.setadapterparms.hdr.command_code = command;
3066                 cmd->data.setadapterparms.hdr.used_total = 1;
3067                 cmd->data.setadapterparms.hdr.seq_no = 1;
3068         }
3069 
3070         return iob;
3071 }
3072 
3073 int qeth_query_setadapterparms(struct qeth_card *card)
3074 {
3075         int rc;
3076         struct qeth_cmd_buffer *iob;
3077 
3078         QETH_CARD_TEXT(card, 3, "queryadp");
3079         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_COMMANDS_SUPPORTED,
3080                                    sizeof(struct qeth_ipacmd_setadpparms));
3081         if (!iob)
3082                 return -ENOMEM;
3083         rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL);
3084         return rc;
3085 }
3086 EXPORT_SYMBOL_GPL(qeth_query_setadapterparms);
3087 
3088 static int qeth_query_ipassists_cb(struct qeth_card *card,
3089                 struct qeth_reply *reply, unsigned long data)
3090 {
3091         struct qeth_ipa_cmd *cmd;
3092 
3093         QETH_DBF_TEXT(SETUP, 2, "qipasscb");
3094 
3095         cmd = (struct qeth_ipa_cmd *) data;
3096 
3097         switch (cmd->hdr.return_code) {
3098         case IPA_RC_NOTSUPP:
3099         case IPA_RC_L2_UNSUPPORTED_CMD:
3100                 QETH_DBF_TEXT(SETUP, 2, "ipaunsup");
3101                 card->options.ipa4.supported_funcs |= IPA_SETADAPTERPARMS;
3102                 card->options.ipa6.supported_funcs |= IPA_SETADAPTERPARMS;
3103                 return -0;
3104         default:
3105                 if (cmd->hdr.return_code) {
3106                         QETH_DBF_MESSAGE(1, "%s IPA_CMD_QIPASSIST: Unhandled "
3107                                                 "rc=%d\n",
3108                                                 dev_name(&card->gdev->dev),
3109                                                 cmd->hdr.return_code);
3110                         return 0;
3111                 }
3112         }
3113 
3114         if (cmd->hdr.prot_version == QETH_PROT_IPV4) {
3115                 card->options.ipa4.supported_funcs = cmd->hdr.ipa_supported;
3116                 card->options.ipa4.enabled_funcs = cmd->hdr.ipa_enabled;
3117         } else if (cmd->hdr.prot_version == QETH_PROT_IPV6) {
3118                 card->options.ipa6.supported_funcs = cmd->hdr.ipa_supported;
3119                 card->options.ipa6.enabled_funcs = cmd->hdr.ipa_enabled;
3120         } else
3121                 QETH_DBF_MESSAGE(1, "%s IPA_CMD_QIPASSIST: Flawed LIC detected"
3122                                         "\n", dev_name(&card->gdev->dev));
3123         return 0;
3124 }
3125 
3126 int qeth_query_ipassists(struct qeth_card *card, enum qeth_prot_versions prot)
3127 {
3128         int rc;
3129         struct qeth_cmd_buffer *iob;
3130 
3131         QETH_DBF_TEXT_(SETUP, 2, "qipassi%i", prot);
3132         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_QIPASSIST, prot);
3133         if (!iob)
3134                 return -ENOMEM;
3135         rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL);
3136         return rc;
3137 }
3138 EXPORT_SYMBOL_GPL(qeth_query_ipassists);
3139 
3140 static int qeth_query_switch_attributes_cb(struct qeth_card *card,
3141                                 struct qeth_reply *reply, unsigned long data)
3142 {
3143         struct qeth_ipa_cmd *cmd;
3144         struct qeth_switch_info *sw_info;
3145         struct qeth_query_switch_attributes *attrs;
3146 
3147         QETH_CARD_TEXT(card, 2, "qswiatcb");
3148         cmd = (struct qeth_ipa_cmd *) data;
3149         sw_info = (struct qeth_switch_info *)reply->param;
3150         if (cmd->data.setadapterparms.hdr.return_code == 0) {
3151                 attrs = &cmd->data.setadapterparms.data.query_switch_attributes;
3152                 sw_info->capabilities = attrs->capabilities;
3153                 sw_info->settings = attrs->settings;
3154                 QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities,
3155                                                         sw_info->settings);
3156         }
3157         qeth_default_setadapterparms_cb(card, reply, (unsigned long) cmd);
3158 
3159         return 0;
3160 }
3161 
3162 int qeth_query_switch_attributes(struct qeth_card *card,
3163                                  struct qeth_switch_info *sw_info)
3164 {
3165         struct qeth_cmd_buffer *iob;
3166 
3167         QETH_CARD_TEXT(card, 2, "qswiattr");
3168         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES))
3169                 return -EOPNOTSUPP;
3170         if (!netif_carrier_ok(card->dev))
3171                 return -ENOMEDIUM;
3172         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES,
3173                                 sizeof(struct qeth_ipacmd_setadpparms_hdr));
3174         if (!iob)
3175                 return -ENOMEM;
3176         return qeth_send_ipa_cmd(card, iob,
3177                                 qeth_query_switch_attributes_cb, sw_info);
3178 }
3179 EXPORT_SYMBOL_GPL(qeth_query_switch_attributes);
3180 
3181 static int qeth_query_setdiagass_cb(struct qeth_card *card,
3182                 struct qeth_reply *reply, unsigned long data)
3183 {
3184         struct qeth_ipa_cmd *cmd;
3185         __u16 rc;
3186 
3187         cmd = (struct qeth_ipa_cmd *)data;
3188         rc = cmd->hdr.return_code;
3189         if (rc)
3190                 QETH_CARD_TEXT_(card, 2, "diagq:%x", rc);
3191         else
3192                 card->info.diagass_support = cmd->data.diagass.ext;
3193         return 0;
3194 }
3195 
3196 static int qeth_query_setdiagass(struct qeth_card *card)
3197 {
3198         struct qeth_cmd_buffer *iob;
3199         struct qeth_ipa_cmd    *cmd;
3200 
3201         QETH_DBF_TEXT(SETUP, 2, "qdiagass");
3202         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SET_DIAG_ASS, 0);
3203         if (!iob)
3204                 return -ENOMEM;
3205         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
3206         cmd->data.diagass.subcmd_len = 16;
3207         cmd->data.diagass.subcmd = QETH_DIAGS_CMD_QUERY;
3208         return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL);
3209 }
3210 
3211 static void qeth_get_trap_id(struct qeth_card *card, struct qeth_trap_id *tid)
3212 {
3213         unsigned long info = get_zeroed_page(GFP_KERNEL);
3214         struct sysinfo_2_2_2 *info222 = (struct sysinfo_2_2_2 *)info;
3215         struct sysinfo_3_2_2 *info322 = (struct sysinfo_3_2_2 *)info;
3216         struct ccw_dev_id ccwid;
3217         int level;
3218 
3219         tid->chpid = card->info.chpid;
3220         ccw_device_get_id(CARD_RDEV(card), &ccwid);
3221         tid->ssid = ccwid.ssid;
3222         tid->devno = ccwid.devno;
3223         if (!info)
3224                 return;
3225         level = stsi(NULL, 0, 0, 0);
3226         if ((level >= 2) && (stsi(info222, 2, 2, 2) == 0))
3227                 tid->lparnr = info222->lpar_number;
3228         if ((level >= 3) && (stsi(info322, 3, 2, 2) == 0)) {
3229                 EBCASC(info322->vm[0].name, sizeof(info322->vm[0].name));
3230                 memcpy(tid->vmname, info322->vm[0].name, sizeof(tid->vmname));
3231         }
3232         free_page(info);
3233         return;
3234 }
3235 
3236 static int qeth_hw_trap_cb(struct qeth_card *card,
3237                 struct qeth_reply *reply, unsigned long data)
3238 {
3239         struct qeth_ipa_cmd *cmd;
3240         __u16 rc;
3241 
3242         cmd = (struct qeth_ipa_cmd *)data;
3243         rc = cmd->hdr.return_code;
3244         if (rc)
3245                 QETH_CARD_TEXT_(card, 2, "trapc:%x", rc);
3246         return 0;
3247 }
3248 
3249 int qeth_hw_trap(struct qeth_card *card, enum qeth_diags_trap_action action)
3250 {
3251         struct qeth_cmd_buffer *iob;
3252         struct qeth_ipa_cmd *cmd;
3253 
3254         QETH_DBF_TEXT(SETUP, 2, "diagtrap");
3255         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SET_DIAG_ASS, 0);
3256         if (!iob)
3257                 return -ENOMEM;
3258         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
3259         cmd->data.diagass.subcmd_len = 80;
3260         cmd->data.diagass.subcmd = QETH_DIAGS_CMD_TRAP;
3261         cmd->data.diagass.type = 1;
3262         cmd->data.diagass.action = action;
3263         switch (action) {
3264         case QETH_DIAGS_TRAP_ARM:
3265                 cmd->data.diagass.options = 0x0003;
3266                 cmd->data.diagass.ext = 0x00010000 +
3267                         sizeof(struct qeth_trap_id);
3268                 qeth_get_trap_id(card,
3269                         (struct qeth_trap_id *)cmd->data.diagass.cdata);
3270                 break;
3271         case QETH_DIAGS_TRAP_DISARM:
3272                 cmd->data.diagass.options = 0x0001;
3273                 break;
3274         case QETH_DIAGS_TRAP_CAPTURE:
3275                 break;
3276         }
3277         return qeth_send_ipa_cmd(card, iob, qeth_hw_trap_cb, NULL);
3278 }
3279 EXPORT_SYMBOL_GPL(qeth_hw_trap);
3280 
3281 int qeth_check_qdio_errors(struct qeth_card *card, struct qdio_buffer *buf,
3282                 unsigned int qdio_error, const char *dbftext)
3283 {
3284         if (qdio_error) {
3285                 QETH_CARD_TEXT(card, 2, dbftext);
3286                 QETH_CARD_TEXT_(card, 2, " F15=%02X",
3287                                buf->element[15].sflags);
3288                 QETH_CARD_TEXT_(card, 2, " F14=%02X",
3289                                buf->element[14].sflags);
3290                 QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error);
3291                 if ((buf->element[15].sflags) == 0x12) {
3292                         card->stats.rx_dropped++;
3293                         return 0;
3294                 } else
3295                         return 1;
3296         }
3297         return 0;
3298 }
3299 EXPORT_SYMBOL_GPL(qeth_check_qdio_errors);
3300 
3301 static void qeth_buffer_reclaim_work(struct work_struct *work)
3302 {
3303         struct qeth_card *card = container_of(work, struct qeth_card,
3304                 buffer_reclaim_work.work);
3305 
3306         QETH_CARD_TEXT_(card, 2, "brw:%x", card->reclaim_index);
3307         qeth_queue_input_buffer(card, card->reclaim_index);
3308 }
3309 
3310 void qeth_queue_input_buffer(struct qeth_card *card, int index)
3311 {
3312         struct qeth_qdio_q *queue = card->qdio.in_q;
3313         struct list_head *lh;
3314         int count;
3315         int i;
3316         int rc;
3317         int newcount = 0;
3318 
3319         count = (index < queue->next_buf_to_init)?
3320                 card->qdio.in_buf_pool.buf_count -
3321                 (queue->next_buf_to_init - index) :
3322                 card->qdio.in_buf_pool.buf_count -
3323                 (queue->next_buf_to_init + QDIO_MAX_BUFFERS_PER_Q - index);
3324         /* only requeue at a certain threshold to avoid SIGAs */
3325         if (count >= QETH_IN_BUF_REQUEUE_THRESHOLD(card)) {
3326                 for (i = queue->next_buf_to_init;
3327                      i < queue->next_buf_to_init + count; ++i) {
3328                         if (qeth_init_input_buffer(card,
3329                                 &queue->bufs[i % QDIO_MAX_BUFFERS_PER_Q])) {
3330                                 break;
3331                         } else {
3332                                 newcount++;
3333                         }
3334                 }
3335 
3336                 if (newcount < count) {
3337                         /* we are in memory shortage so we switch back to
3338                            traditional skb allocation and drop packages */
3339                         atomic_set(&card->force_alloc_skb, 3);
3340                         count = newcount;
3341                 } else {
3342                         atomic_add_unless(&card->force_alloc_skb, -1, 0);
3343                 }
3344 
3345                 if (!count) {
3346                         i = 0;
3347                         list_for_each(lh, &card->qdio.in_buf_pool.entry_list)
3348                                 i++;
3349                         if (i == card->qdio.in_buf_pool.buf_count) {
3350                                 QETH_CARD_TEXT(card, 2, "qsarbw");
3351                                 card->reclaim_index = index;
3352                                 schedule_delayed_work(
3353                                         &card->buffer_reclaim_work,
3354                                         QETH_RECLAIM_WORK_TIME);
3355                         }
3356                         return;
3357                 }
3358 
3359                 /*
3360                  * according to old code it should be avoided to requeue all
3361                  * 128 buffers in order to benefit from PCI avoidance.
3362                  * this function keeps at least one buffer (the buffer at
3363                  * 'index') un-requeued -> this buffer is the first buffer that
3364                  * will be requeued the next time
3365                  */
3366                 if (card->options.performance_stats) {
3367                         card->perf_stats.inbound_do_qdio_cnt++;
3368                         card->perf_stats.inbound_do_qdio_start_time =
3369                                 qeth_get_micros();
3370                 }
3371                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0,
3372                              queue->next_buf_to_init, count);
3373                 if (card->options.performance_stats)
3374                         card->perf_stats.inbound_do_qdio_time +=
3375                                 qeth_get_micros() -
3376                                 card->perf_stats.inbound_do_qdio_start_time;
3377                 if (rc) {
3378                         QETH_CARD_TEXT(card, 2, "qinberr");
3379                 }
3380                 queue->next_buf_to_init = (queue->next_buf_to_init + count) %
3381                                           QDIO_MAX_BUFFERS_PER_Q;
3382         }
3383 }
3384 EXPORT_SYMBOL_GPL(qeth_queue_input_buffer);
3385 
3386 static int qeth_handle_send_error(struct qeth_card *card,
3387                 struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err)
3388 {
3389         int sbalf15 = buffer->buffer->element[15].sflags;
3390 
3391         QETH_CARD_TEXT(card, 6, "hdsnderr");
3392         if (card->info.type == QETH_CARD_TYPE_IQD) {
3393                 if (sbalf15 == 0) {
3394                         qdio_err = 0;
3395                 } else {
3396                         qdio_err = 1;
3397                 }
3398         }
3399         qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr");
3400 
3401         if (!qdio_err)
3402                 return QETH_SEND_ERROR_NONE;
3403 
3404         if ((sbalf15 >= 15) && (sbalf15 <= 31))
3405                 return QETH_SEND_ERROR_RETRY;
3406 
3407         QETH_CARD_TEXT(card, 1, "lnkfail");
3408         QETH_CARD_TEXT_(card, 1, "%04x %02x",
3409                        (u16)qdio_err, (u8)sbalf15);
3410         return QETH_SEND_ERROR_LINK_FAILURE;
3411 }
3412 
3413 /*
3414  * Switched to packing state if the number of used buffers on a queue
3415  * reaches a certain limit.
3416  */
3417 static void qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q *queue)
3418 {
3419         if (!queue->do_pack) {
3420                 if (atomic_read(&queue->used_buffers)
3421                     >= QETH_HIGH_WATERMARK_PACK){
3422                         /* switch non-PACKING -> PACKING */
3423                         QETH_CARD_TEXT(queue->card, 6, "np->pack");
3424                         if (queue->card->options.performance_stats)
3425                                 queue->card->perf_stats.sc_dp_p++;
3426                         queue->do_pack = 1;
3427                 }
3428         }
3429 }
3430 
3431 /*
3432  * Switches from packing to non-packing mode. If there is a packing
3433  * buffer on the queue this buffer will be prepared to be flushed.
3434  * In that case 1 is returned to inform the caller. If no buffer
3435  * has to be flushed, zero is returned.
3436  */
3437 static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue)
3438 {
3439         struct qeth_qdio_out_buffer *buffer;
3440         int flush_count = 0;
3441 
3442         if (queue->do_pack) {
3443                 if (atomic_read(&queue->used_buffers)
3444                     <= QETH_LOW_WATERMARK_PACK) {
3445                         /* switch PACKING -> non-PACKING */
3446                         QETH_CARD_TEXT(queue->card, 6, "pack->np");
3447                         if (queue->card->options.performance_stats)
3448                                 queue->card->perf_stats.sc_p_dp++;
3449                         queue->do_pack = 0;
3450                         /* flush packing buffers */
3451                         buffer = queue->bufs[queue->next_buf_to_fill];
3452                         if ((atomic_read(&buffer->state) ==
3453                                                 QETH_QDIO_BUF_EMPTY) &&
3454                             (buffer->next_element_to_fill > 0)) {
3455                                 atomic_set(&buffer->state,
3456                                            QETH_QDIO_BUF_PRIMED);
3457                                 flush_count++;
3458                                 queue->next_buf_to_fill =
3459                                         (queue->next_buf_to_fill + 1) %
3460                                         QDIO_MAX_BUFFERS_PER_Q;
3461                         }
3462                 }
3463         }
3464         return flush_count;
3465 }
3466 
3467 
3468 /*
3469  * Called to flush a packing buffer if no more pci flags are on the queue.
3470  * Checks if there is a packing buffer and prepares it to be flushed.
3471  * In that case returns 1, otherwise zero.
3472  */
3473 static int qeth_flush_buffers_on_no_pci(struct qeth_qdio_out_q *queue)
3474 {
3475         struct qeth_qdio_out_buffer *buffer;
3476 
3477         buffer = queue->bufs[queue->next_buf_to_fill];
3478         if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) &&
3479            (buffer->next_element_to_fill > 0)) {
3480                 /* it's a packing buffer */
3481                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3482                 queue->next_buf_to_fill =
3483                         (queue->next_buf_to_fill + 1) % QDIO_MAX_BUFFERS_PER_Q;
3484                 return 1;
3485         }
3486         return 0;
3487 }
3488 
3489 static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
3490                                int count)
3491 {
3492         struct qeth_qdio_out_buffer *buf;
3493         int rc;
3494         int i;
3495         unsigned int qdio_flags;
3496 
3497         for (i = index; i < index + count; ++i) {
3498                 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3499                 buf = queue->bufs[bidx];
3500                 buf->buffer->element[buf->next_element_to_fill - 1].eflags |=
3501                                 SBAL_EFLAGS_LAST_ENTRY;
3502 
3503                 if (queue->bufstates)
3504                         queue->bufstates[bidx].user = buf;
3505 
3506                 if (queue->card->info.type == QETH_CARD_TYPE_IQD)
3507                         continue;
3508 
3509                 if (!queue->do_pack) {
3510                         if ((atomic_read(&queue->used_buffers) >=
3511                                 (QETH_HIGH_WATERMARK_PACK -
3512                                  QETH_WATERMARK_PACK_FUZZ)) &&
3513                             !atomic_read(&queue->set_pci_flags_count)) {
3514                                 /* it's likely that we'll go to packing
3515                                  * mode soon */
3516                                 atomic_inc(&queue->set_pci_flags_count);
3517                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3518                         }
3519                 } else {
3520                         if (!atomic_read(&queue->set_pci_flags_count)) {
3521                                 /*
3522                                  * there's no outstanding PCI any more, so we
3523                                  * have to request a PCI to be sure the the PCI
3524                                  * will wake at some time in the future then we
3525                                  * can flush packed buffers that might still be
3526                                  * hanging around, which can happen if no
3527                                  * further send was requested by the stack
3528                                  */
3529                                 atomic_inc(&queue->set_pci_flags_count);
3530                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3531                         }
3532                 }
3533         }
3534 
3535         queue->card->dev->trans_start = jiffies;
3536         if (queue->card->options.performance_stats) {
3537                 queue->card->perf_stats.outbound_do_qdio_cnt++;
3538                 queue->card->perf_stats.outbound_do_qdio_start_time =
3539                         qeth_get_micros();
3540         }
3541         qdio_flags = QDIO_FLAG_SYNC_OUTPUT;
3542         if (atomic_read(&queue->set_pci_flags_count))
3543                 qdio_flags |= QDIO_FLAG_PCI_OUT;
3544         rc = do_QDIO(CARD_DDEV(queue->card), qdio_flags,
3545                      queue->queue_no, index, count);
3546         if (queue->card->options.performance_stats)
3547                 queue->card->perf_stats.outbound_do_qdio_time +=
3548                         qeth_get_micros() -
3549                         queue->card->perf_stats.outbound_do_qdio_start_time;
3550         atomic_add(count, &queue->used_buffers);
3551         if (rc) {
3552                 queue->card->stats.tx_errors += count;
3553                 /* ignore temporary SIGA errors without busy condition */
3554                 if (rc == -ENOBUFS)
3555                         return;
3556                 QETH_CARD_TEXT(queue->card, 2, "flushbuf");
3557                 QETH_CARD_TEXT_(queue->card, 2, " q%d", queue->queue_no);
3558                 QETH_CARD_TEXT_(queue->card, 2, " idx%d", index);
3559                 QETH_CARD_TEXT_(queue->card, 2, " c%d", count);
3560                 QETH_CARD_TEXT_(queue->card, 2, " err%d", rc);
3561 
3562                 /* this must not happen under normal circumstances. if it
3563                  * happens something is really wrong -> recover */
3564                 qeth_schedule_recovery(queue->card);
3565                 return;
3566         }
3567         if (queue->card->options.performance_stats)
3568                 queue->card->perf_stats.bufs_sent += count;
3569 }
3570 
3571 static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue)
3572 {
3573         int index;
3574         int flush_cnt = 0;
3575         int q_was_packing = 0;
3576 
3577         /*
3578          * check if weed have to switch to non-packing mode or if
3579          * we have to get a pci flag out on the queue
3580          */
3581         if ((atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) ||
3582             !atomic_read(&queue->set_pci_flags_count)) {
3583                 if (atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH) ==
3584                                 QETH_OUT_Q_UNLOCKED) {
3585                         /*
3586                          * If we get in here, there was no action in
3587                          * do_send_packet. So, we check if there is a
3588                          * packing buffer to be flushed here.
3589                          */
3590                         netif_stop_queue(queue->card->dev);
3591                         index = queue->next_buf_to_fill;
3592                         q_was_packing = queue->do_pack;
3593                         /* queue->do_pack may change */
3594                         barrier();
3595                         flush_cnt += qeth_switch_to_nonpacking_if_needed(queue);
3596                         if (!flush_cnt &&
3597                             !atomic_read(&queue->set_pci_flags_count))
3598                                 flush_cnt +=
3599                                         qeth_flush_buffers_on_no_pci(queue);
3600                         if (queue->card->options.performance_stats &&
3601                             q_was_packing)
3602                                 queue->card->perf_stats.bufs_sent_pack +=
3603                                         flush_cnt;
3604                         if (flush_cnt)
3605                                 qeth_flush_buffers(queue, index, flush_cnt);
3606                         atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
3607                 }
3608         }
3609 }
3610 
3611 void qeth_qdio_start_poll(struct ccw_device *ccwdev, int queue,
3612                 unsigned long card_ptr)
3613 {
3614         struct qeth_card *card = (struct qeth_card *)card_ptr;
3615 
3616         if (card->dev && (card->dev->flags & IFF_UP))
3617                 napi_schedule(&card->napi);
3618 }
3619 EXPORT_SYMBOL_GPL(qeth_qdio_start_poll);
3620 
3621 int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq)
3622 {
3623         int rc;
3624 
3625         if (card->options.cq ==  QETH_CQ_NOTAVAILABLE) {
3626                 rc = -1;
3627                 goto out;
3628         } else {
3629                 if (card->options.cq == cq) {
3630                         rc = 0;
3631                         goto out;
3632                 }
3633 
3634                 if (card->state != CARD_STATE_DOWN &&
3635                     card->state != CARD_STATE_RECOVER) {
3636                         rc = -1;
3637                         goto out;
3638                 }
3639 
3640                 qeth_free_qdio_buffers(card);
3641                 card->options.cq = cq;
3642                 rc = 0;
3643         }
3644 out:
3645         return rc;
3646 
3647 }
3648 EXPORT_SYMBOL_GPL(qeth_configure_cq);
3649 
3650 
3651 static void qeth_qdio_cq_handler(struct qeth_card *card,
3652                 unsigned int qdio_err,
3653                 unsigned int queue, int first_element, int count) {
3654         struct qeth_qdio_q *cq = card->qdio.c_q;
3655         int i;
3656         int rc;
3657 
3658         if (!qeth_is_cq(card, queue))
3659                 goto out;
3660 
3661         QETH_CARD_TEXT_(card, 5, "qcqhe%d", first_element);
3662         QETH_CARD_TEXT_(card, 5, "qcqhc%d", count);
3663         QETH_CARD_TEXT_(card, 5, "qcqherr%d", qdio_err);
3664 
3665         if (qdio_err) {
3666                 netif_stop_queue(card->dev);
3667                 qeth_schedule_recovery(card);
3668                 goto out;
3669         }
3670 
3671         if (card->options.performance_stats) {
3672                 card->perf_stats.cq_cnt++;
3673                 card->perf_stats.cq_start_time = qeth_get_micros();
3674         }
3675 
3676         for (i = first_element; i < first_element + count; ++i) {
3677                 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3678                 struct qdio_buffer *buffer = cq->qdio_bufs[bidx];
3679                 int e;
3680 
3681                 e = 0;
3682                 while (buffer->element[e].addr) {
3683                         unsigned long phys_aob_addr;
3684 
3685                         phys_aob_addr = (unsigned long) buffer->element[e].addr;
3686                         qeth_qdio_handle_aob(card, phys_aob_addr);
3687                         buffer->element[e].addr = NULL;
3688                         buffer->element[e].eflags = 0;
3689                         buffer->element[e].sflags = 0;
3690                         buffer->element[e].length = 0;
3691 
3692                         ++e;
3693                 }
3694 
3695                 buffer->element[15].eflags = 0;
3696                 buffer->element[15].sflags = 0;
3697         }
3698         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, queue,
3699                     card->qdio.c_q->next_buf_to_init,
3700                     count);
3701         if (rc) {
3702                 dev_warn(&card->gdev->dev,
3703                         "QDIO reported an error, rc=%i\n", rc);
3704                 QETH_CARD_TEXT(card, 2, "qcqherr");
3705         }
3706         card->qdio.c_q->next_buf_to_init = (card->qdio.c_q->next_buf_to_init
3707                                    + count) % QDIO_MAX_BUFFERS_PER_Q;
3708 
3709         netif_wake_queue(card->dev);
3710 
3711         if (card->options.performance_stats) {
3712                 int delta_t = qeth_get_micros();
3713                 delta_t -= card->perf_stats.cq_start_time;
3714                 card->perf_stats.cq_time += delta_t;
3715         }
3716 out:
3717         return;
3718 }
3719 
3720 void qeth_qdio_input_handler(struct ccw_device *ccwdev, unsigned int qdio_err,
3721                 unsigned int queue, int first_elem, int count,
3722                 unsigned long card_ptr)
3723 {
3724         struct qeth_card *card = (struct qeth_card *)card_ptr;
3725 
3726         QETH_CARD_TEXT_(card, 2, "qihq%d", queue);
3727         QETH_CARD_TEXT_(card, 2, "qiec%d", qdio_err);
3728 
3729         if (qeth_is_cq(card, queue))
3730                 qeth_qdio_cq_handler(card, qdio_err, queue, first_elem, count);
3731         else if (qdio_err)
3732                 qeth_schedule_recovery(card);
3733 
3734 
3735 }
3736 EXPORT_SYMBOL_GPL(qeth_qdio_input_handler);
3737 
3738 void qeth_qdio_output_handler(struct ccw_device *ccwdev,
3739                 unsigned int qdio_error, int __queue, int first_element,
3740                 int count, unsigned long card_ptr)
3741 {
3742         struct qeth_card *card        = (struct qeth_card *) card_ptr;
3743         struct qeth_qdio_out_q *queue = card->qdio.out_qs[__queue];
3744         struct qeth_qdio_out_buffer *buffer;
3745         int i;
3746 
3747         QETH_CARD_TEXT(card, 6, "qdouhdl");
3748         if (qdio_error & QDIO_ERROR_FATAL) {
3749                 QETH_CARD_TEXT(card, 2, "achkcond");
3750                 netif_stop_queue(card->dev);
3751                 qeth_schedule_recovery(card);
3752                 return;
3753         }
3754         if (card->options.performance_stats) {
3755                 card->perf_stats.outbound_handler_cnt++;
3756                 card->perf_stats.outbound_handler_start_time =
3757                         qeth_get_micros();
3758         }
3759         for (i = first_element; i < (first_element + count); ++i) {
3760                 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3761                 buffer = queue->bufs[bidx];
3762                 qeth_handle_send_error(card, buffer, qdio_error);
3763 
3764                 if (queue->bufstates &&
3765                     (queue->bufstates[bidx].flags &
3766                      QDIO_OUTBUF_STATE_FLAG_PENDING) != 0) {
3767                         WARN_ON_ONCE(card->options.cq != QETH_CQ_ENABLED);
3768 
3769                         if (atomic_cmpxchg(&buffer->state,
3770                                            QETH_QDIO_BUF_PRIMED,
3771                                            QETH_QDIO_BUF_PENDING) ==
3772                                 QETH_QDIO_BUF_PRIMED) {
3773                                 qeth_notify_skbs(queue, buffer,
3774                                                  TX_NOTIFY_PENDING);
3775                         }
3776                         buffer->aob = queue->bufstates[bidx].aob;
3777                         QETH_CARD_TEXT_(queue->card, 5, "pel%d", bidx);
3778                         QETH_CARD_TEXT(queue->card, 5, "aob");
3779                         QETH_CARD_TEXT_(queue->card, 5, "%lx",
3780                                         virt_to_phys(buffer->aob));
3781                         if (qeth_init_qdio_out_buf(queue, bidx)) {
3782                                 QETH_CARD_TEXT(card, 2, "outofbuf");
3783                                 qeth_schedule_recovery(card);
3784                         }
3785                 } else {
3786                         if (card->options.cq == QETH_CQ_ENABLED) {
3787                                 enum iucv_tx_notify n;
3788 
3789                                 n = qeth_compute_cq_notification(
3790                                         buffer->buffer->element[15].sflags, 0);
3791                                 qeth_notify_skbs(queue, buffer, n);
3792                         }
3793 
3794                         qeth_clear_output_buffer(queue, buffer,
3795                                                 QETH_QDIO_BUF_EMPTY);
3796                 }
3797                 qeth_cleanup_handled_pending(queue, bidx, 0);
3798         }
3799         atomic_sub(count, &queue->used_buffers);
3800         /* check if we need to do something on this outbound queue */
3801         if (card->info.type != QETH_CARD_TYPE_IQD)
3802                 qeth_check_outbound_queue(queue);
3803 
3804         netif_wake_queue(queue->card->dev);
3805         if (card->options.performance_stats)
3806                 card->perf_stats.outbound_handler_time += qeth_get_micros() -
3807                         card->perf_stats.outbound_handler_start_time;
3808 }
3809 EXPORT_SYMBOL_GPL(qeth_qdio_output_handler);
3810 
3811 /**
3812  * Note: Function assumes that we have 4 outbound queues.
3813  */
3814 int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb,
3815                         int ipv, int cast_type)
3816 {
3817         __be16 *tci;
3818         u8 tos;
3819 
3820         if (cast_type && card->info.is_multicast_different)
3821                 return card->info.is_multicast_different &
3822                         (card->qdio.no_out_queues - 1);
3823 
3824         switch (card->qdio.do_prio_queueing) {
3825         case QETH_PRIO_Q_ING_TOS:
3826         case QETH_PRIO_Q_ING_PREC:
3827                 switch (ipv) {
3828                 case 4:
3829                         tos = ipv4_get_dsfield(ip_hdr(skb));
3830                         break;
3831                 case 6:
3832                         tos = ipv6_get_dsfield(ipv6_hdr(skb));
3833                         break;
3834                 default:
3835                         return card->qdio.default_out_queue;
3836                 }
3837                 if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC)
3838                         return ~tos >> 6 & 3;
3839                 if (tos & IPTOS_MINCOST)
3840                         return 3;
3841                 if (tos & IPTOS_RELIABILITY)
3842                         return 2;
3843                 if (tos & IPTOS_THROUGHPUT)
3844                         return 1;
3845                 if (tos & IPTOS_LOWDELAY)
3846                         return 0;
3847                 break;
3848         case QETH_PRIO_Q_ING_SKB:
3849                 if (skb->priority > 5)
3850                         return 0;
3851                 return ~skb->priority >> 1 & 3;
3852         case QETH_PRIO_Q_ING_VLAN:
3853                 tci = &((struct ethhdr *)skb->data)->h_proto;
3854                 if (*tci == ETH_P_8021Q)
3855                         return ~*(tci + 1) >> (VLAN_PRIO_SHIFT + 1) & 3;
3856                 break;
3857         default:
3858                 break;
3859         }
3860         return card->qdio.default_out_queue;
3861 }
3862 EXPORT_SYMBOL_GPL(qeth_get_priority_queue);
3863 
3864 int qeth_get_elements_for_frags(struct sk_buff *skb)
3865 {
3866         int cnt, length, e, elements = 0;
3867         struct skb_frag_struct *frag;
3868         char *data;
3869 
3870         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3871                 frag = &skb_shinfo(skb)->frags[cnt];
3872                 data = (char *)page_to_phys(skb_frag_page(frag)) +
3873                         frag->page_offset;
3874                 length = frag->size;
3875                 e = PFN_UP((unsigned long)data + length - 1) -
3876                         PFN_DOWN((unsigned long)data);
3877                 elements += e;
3878         }
3879         return elements;
3880 }
3881 EXPORT_SYMBOL_GPL(qeth_get_elements_for_frags);
3882 
3883 int qeth_get_elements_no(struct qeth_card *card,
3884                      struct sk_buff *skb, int elems)
3885 {
3886         int dlen = skb->len - skb->data_len;
3887         int elements_needed = PFN_UP((unsigned long)skb->data + dlen - 1) -
3888                 PFN_DOWN((unsigned long)skb->data);
3889 
3890         elements_needed += qeth_get_elements_for_frags(skb);
3891 
3892         if ((elements_needed + elems) > QETH_MAX_BUFFER_ELEMENTS(card)) {
3893                 QETH_DBF_MESSAGE(2, "Invalid size of IP packet "
3894                         "(Number=%d / Length=%d). Discarded.\n",
3895                         (elements_needed+elems), skb->len);
3896                 return 0;
3897         }
3898         return elements_needed;
3899 }
3900 EXPORT_SYMBOL_GPL(qeth_get_elements_no);
3901 
3902 int qeth_hdr_chk_and_bounce(struct sk_buff *skb, struct qeth_hdr **hdr, int len)
3903 {
3904         int hroom, inpage, rest;
3905 
3906         if (((unsigned long)skb->data & PAGE_MASK) !=
3907             (((unsigned long)skb->data + len - 1) & PAGE_MASK)) {
3908                 hroom = skb_headroom(skb);
3909                 inpage = PAGE_SIZE - ((unsigned long) skb->data % PAGE_SIZE);
3910                 rest = len - inpage;
3911                 if (rest > hroom)
3912                         return 1;
3913                 memmove(skb->data - rest, skb->data, skb->len - skb->data_len);
3914                 skb->data -= rest;
3915                 skb->tail -= rest;
3916                 *hdr = (struct qeth_hdr *)skb->data;
3917                 QETH_DBF_MESSAGE(2, "skb bounce len: %d rest: %d\n", len, rest);
3918         }
3919         return 0;
3920 }
3921 EXPORT_SYMBOL_GPL(qeth_hdr_chk_and_bounce);
3922 
3923 static inline void __qeth_fill_buffer(struct sk_buff *skb,
3924         struct qdio_buffer *buffer, int is_tso, int *next_element_to_fill,
3925         int offset)
3926 {
3927         int length = skb->len - skb->data_len;
3928         int length_here;
3929         int element;
3930         char *data;
3931         int first_lap, cnt;
3932         struct skb_frag_struct *frag;
3933 
3934         element = *next_element_to_fill;
3935         data = skb->data;
3936         first_lap = (is_tso == 0 ? 1 : 0);
3937 
3938         if (offset >= 0) {
3939                 data = skb->data + offset;
3940                 length -= offset;
3941                 first_lap = 0;
3942         }
3943 
3944         while (length > 0) {
3945                 /* length_here is the remaining amount of data in this page */
3946                 length_here = PAGE_SIZE - ((unsigned long) data % PAGE_SIZE);
3947                 if (length < length_here)
3948                         length_here = length;
3949 
3950                 buffer->element[element].addr = data;
3951                 buffer->element[element].length = length_here;
3952                 length -= length_here;
3953                 if (!length) {
3954                         if (first_lap)
3955                                 if (skb_shinfo(skb)->nr_frags)
3956                                         buffer->element[element].eflags =
3957                                                 SBAL_EFLAGS_FIRST_FRAG;
3958                                 else
3959                                         buffer->element[element].eflags = 0;
3960                         else
3961                                 buffer->element[element].eflags =
3962                                     SBAL_EFLAGS_MIDDLE_FRAG;
3963                 } else {
3964                         if (first_lap)
3965                                 buffer->element[element].eflags =
3966                                     SBAL_EFLAGS_FIRST_FRAG;
3967                         else
3968                                 buffer->element[element].eflags =
3969                                     SBAL_EFLAGS_MIDDLE_FRAG;
3970                 }
3971                 data += length_here;
3972                 element++;
3973                 first_lap = 0;
3974         }
3975 
3976         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3977                 frag = &skb_shinfo(skb)->frags[cnt];
3978                 data = (char *)page_to_phys(skb_frag_page(frag)) +
3979                         frag->page_offset;
3980                 length = frag->size;
3981                 while (length > 0) {
3982                         length_here = PAGE_SIZE -
3983                                 ((unsigned long) data % PAGE_SIZE);
3984                         if (length < length_here)
3985                                 length_here = length;
3986 
3987                         buffer->element[element].addr = data;
3988                         buffer->element[element].length = length_here;
3989                         buffer->element[element].eflags =
3990                                 SBAL_EFLAGS_MIDDLE_FRAG;
3991                         length -= length_here;
3992                         data += length_here;
3993                         element++;
3994                 }
3995         }
3996 
3997         if (buffer->element[element - 1].eflags)
3998                 buffer->element[element - 1].eflags = SBAL_EFLAGS_LAST_FRAG;
3999         *next_element_to_fill = element;
4000 }
4001 
4002 static inline int qeth_fill_buffer(struct qeth_qdio_out_q *queue,
4003                 struct qeth_qdio_out_buffer *buf, struct sk_buff *skb,
4004                 struct qeth_hdr *hdr, int offset, int hd_len)
4005 {
4006         struct qdio_buffer *buffer;
4007         int flush_cnt = 0, hdr_len, large_send = 0;
4008 
4009         buffer = buf->buffer;
4010         atomic_inc(&skb->users);
4011         skb_queue_tail(&buf->skb_list, skb);
4012 
4013         /*check first on TSO ....*/
4014         if (hdr->hdr.l3.id == QETH_HEADER_TYPE_TSO) {
4015                 int element = buf->next_element_to_fill;
4016 
4017                 hdr_len = sizeof(struct qeth_hdr_tso) +
4018                         ((struct qeth_hdr_tso *)hdr)->ext.dg_hdr_len;
4019                 /*fill first buffer entry only with header information */
4020                 buffer->element[element].addr = skb->data;
4021                 buffer->element[element].length = hdr_len;
4022                 buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
4023                 buf->next_element_to_fill++;
4024                 skb->data += hdr_len;
4025                 skb->len  -= hdr_len;
4026                 large_send = 1;
4027         }
4028 
4029         if (offset >= 0) {
4030                 int element = buf->next_element_to_fill;
4031                 buffer->element[element].addr = hdr;
4032                 buffer->element[element].length = sizeof(struct qeth_hdr) +
4033                                                         hd_len;
4034                 buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
4035                 buf->is_header[element] = 1;
4036                 buf->next_element_to_fill++;
4037         }
4038 
4039         __qeth_fill_buffer(skb, buffer, large_send,
4040                 (int *)&buf->next_element_to_fill, offset);
4041 
4042         if (!queue->do_pack) {
4043                 QETH_CARD_TEXT(queue->card, 6, "fillbfnp");
4044                 /* set state to PRIMED -> will be flushed */
4045                 atomic_set(&buf->state, QETH_QDIO_BUF_PRIMED);
4046                 flush_cnt = 1;
4047         } else {
4048                 QETH_CARD_TEXT(queue->card, 6, "fillbfpa");
4049                 if (queue->card->options.performance_stats)
4050                         queue->card->perf_stats.skbs_sent_pack++;
4051                 if (buf->next_element_to_fill >=
4052                                 QETH_MAX_BUFFER_ELEMENTS(queue->card)) {
4053                         /*
4054                          * packed buffer if full -> set state PRIMED
4055                          * -> will be flushed
4056                          */
4057                         atomic_set(&buf->state, QETH_QDIO_BUF_PRIMED);
4058                         flush_cnt = 1;
4059                 }
4060         }
4061         return flush_cnt;
4062 }
4063 
4064 int qeth_do_send_packet_fast(struct qeth_card *card,
4065                 struct qeth_qdio_out_q *queue, struct sk_buff *skb,
4066                 struct qeth_hdr *hdr, int elements_needed,
4067                 int offset, int hd_len)
4068 {
4069         struct qeth_qdio_out_buffer *buffer;
4070         int index;
4071 
4072         /* spin until we get the queue ... */
4073         while (atomic_cmpxchg(&queue->state, QETH_OUT_Q_UNLOCKED,
4074                               QETH_OUT_Q_LOCKED) != QETH_OUT_Q_UNLOCKED);
4075         /* ... now we've got the queue */
4076         index = queue->next_buf_to_fill;
4077         buffer = queue->bufs[queue->next_buf_to_fill];
4078         /*
4079          * check if buffer is empty to make sure that we do not 'overtake'
4080          * ourselves and try to fill a buffer that is already primed
4081          */
4082         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4083                 goto out;
4084         queue->next_buf_to_fill = (queue->next_buf_to_fill + 1) %
4085                                           QDIO_MAX_BUFFERS_PER_Q;
4086         atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
4087         qeth_fill_buffer(queue, buffer, skb, hdr, offset, hd_len);
4088         qeth_flush_buffers(queue, index, 1);
4089         return 0;
4090 out:
4091         atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
4092         return -EBUSY;
4093 }
4094 EXPORT_SYMBOL_GPL(qeth_do_send_packet_fast);
4095 
4096 int qeth_do_send_packet(struct qeth_card *card, struct qeth_qdio_out_q *queue,
4097                 struct sk_buff *skb, struct qeth_hdr *hdr,
4098                 int elements_needed)
4099 {
4100         struct qeth_qdio_out_buffer *buffer;
4101         int start_index;
4102         int flush_count = 0;
4103         int do_pack = 0;
4104         int tmp;
4105         int rc = 0;
4106 
4107         /* spin until we get the queue ... */
4108         while (atomic_cmpxchg(&queue->state, QETH_OUT_Q_UNLOCKED,
4109                               QETH_OUT_Q_LOCKED) != QETH_OUT_Q_UNLOCKED);
4110         start_index = queue->next_buf_to_fill;
4111         buffer = queue->bufs[queue->next_buf_to_fill];
4112         /*
4113          * check if buffer is empty to make sure that we do not 'overtake'
4114          * ourselves and try to fill a buffer that is already primed
4115          */
4116         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY) {
4117                 atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
4118                 return -EBUSY;
4119         }
4120         /* check if we need to switch packing state of this queue */
4121         qeth_switch_to_packing_if_needed(queue);
4122         if (queue->do_pack) {
4123                 do_pack = 1;
4124                 /* does packet fit in current buffer? */
4125                 if ((QETH_MAX_BUFFER_ELEMENTS(card) -
4126                     buffer->next_element_to_fill) < elements_needed) {
4127                         /* ... no -> set state PRIMED */
4128                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4129                         flush_count++;
4130                         queue->next_buf_to_fill =
4131                                 (queue->next_buf_to_fill + 1) %
4132                                 QDIO_MAX_BUFFERS_PER_Q;
4133                         buffer = queue->bufs[queue->next_buf_to_fill];
4134                         /* we did a step forward, so check buffer state
4135                          * again */
4136                         if (atomic_read(&buffer->state) !=
4137                             QETH_QDIO_BUF_EMPTY) {
4138                                 qeth_flush_buffers(queue, start_index,
4139                                                            flush_count);
4140                                 atomic_set(&queue->state,
4141                                                 QETH_OUT_Q_UNLOCKED);
4142                                 return -EBUSY;
4143                         }
4144                 }
4145         }
4146         tmp = qeth_fill_buffer(queue, buffer, skb, hdr, -1, 0);
4147         queue->next_buf_to_fill = (queue->next_buf_to_fill + tmp) %
4148                                   QDIO_MAX_BUFFERS_PER_Q;
4149         flush_count += tmp;
4150         if (flush_count)
4151                 qeth_flush_buffers(queue, start_index, flush_count);
4152         else if (!atomic_read(&queue->set_pci_flags_count))
4153                 atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH);
4154         /*
4155          * queue->state will go from LOCKED -> UNLOCKED or from
4156          * LOCKED_FLUSH -> LOCKED if output_handler wanted to 'notify' us
4157          * (switch packing state or flush buffer to get another pci flag out).
4158          * In that case we will enter this loop
4159          */
4160         while (atomic_dec_return(&queue->state)) {
4161                 flush_count = 0;
4162                 start_index = queue->next_buf_to_fill;
4163                 /* check if we can go back to non-packing state */
4164                 flush_count += qeth_switch_to_nonpacking_if_needed(queue);
4165                 /*
4166                  * check if we need to flush a packing buffer to get a pci
4167                  * flag out on the queue
4168                  */
4169                 if (!flush_count && !atomic_read(&queue->set_pci_flags_count))
4170                         flush_count += qeth_flush_buffers_on_no_pci(queue);
4171                 if (flush_count)
4172                         qeth_flush_buffers(queue, start_index, flush_count);
4173         }
4174         /* at this point the queue is UNLOCKED again */
4175         if (queue->card->options.performance_stats && do_pack)
4176                 queue->card->perf_stats.bufs_sent_pack += flush_count;
4177 
4178         return rc;
4179 }
4180 EXPORT_SYMBOL_GPL(qeth_do_send_packet);
4181 
4182 static int qeth_setadp_promisc_mode_cb(struct qeth_card *card,
4183                 struct qeth_reply *reply, unsigned long data)
4184 {
4185         struct qeth_ipa_cmd *cmd;
4186         struct qeth_ipacmd_setadpparms *setparms;
4187 
4188         QETH_CARD_TEXT(card, 4, "prmadpcb");
4189 
4190         cmd = (struct qeth_ipa_cmd *) data;
4191         setparms = &(cmd->data.setadapterparms);
4192 
4193         qeth_default_setadapterparms_cb(card, reply, (unsigned long)cmd);
4194         if (cmd->hdr.return_code) {
4195                 QETH_CARD_TEXT_(card, 4, "prmrc%x", cmd->hdr.return_code);
4196                 setparms->data.mode = SET_PROMISC_MODE_OFF;
4197         }
4198         card->info.promisc_mode = setparms->data.mode;
4199         return 0;
4200 }
4201 
4202 void qeth_setadp_promisc_mode(struct qeth_card *card)
4203 {
4204         enum qeth_ipa_promisc_modes mode;
4205         struct net_device *dev = card->dev;
4206         struct qeth_cmd_buffer *iob;
4207         struct qeth_ipa_cmd *cmd;
4208 
4209         QETH_CARD_TEXT(card, 4, "setprom");
4210 
4211         if (((dev->flags & IFF_PROMISC) &&
4212              (card->info.promisc_mode == SET_PROMISC_MODE_ON)) ||
4213             (!(dev->flags & IFF_PROMISC) &&
4214              (card->info.promisc_mode == SET_PROMISC_MODE_OFF)))
4215                 return;
4216         mode = SET_PROMISC_MODE_OFF;
4217         if (dev->flags & IFF_PROMISC)
4218                 mode = SET_PROMISC_MODE_ON;
4219         QETH_CARD_TEXT_(card, 4, "mode:%x", mode);
4220 
4221         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE,
4222                         sizeof(struct qeth_ipacmd_setadpparms_hdr) + 8);
4223         if (!iob)
4224                 return;
4225         cmd = (struct qeth_ipa_cmd *)(iob->data + IPA_PDU_HEADER_SIZE);
4226         cmd->data.setadapterparms.data.mode = mode;
4227         qeth_send_ipa_cmd(card, iob, qeth_setadp_promisc_mode_cb, NULL);
4228 }
4229 EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode);
4230 
4231 int qeth_change_mtu(struct net_device *dev, int new_mtu)
4232 {
4233         struct qeth_card *card;
4234         char dbf_text[15];
4235 
4236         card = dev->ml_priv;
4237 
4238         QETH_CARD_TEXT(card, 4, "chgmtu");
4239         sprintf(dbf_text, "%8x", new_mtu);
4240         QETH_CARD_TEXT(card, 4, dbf_text);
4241 
4242         if (new_mtu < 64)
4243                 return -EINVAL;
4244         if (new_mtu > 65535)
4245                 return -EINVAL;
4246         if ((!qeth_is_supported(card, IPA_IP_FRAGMENTATION)) &&
4247             (!qeth_mtu_is_valid(card, new_mtu)))
4248                 return -EINVAL;
4249         dev->mtu = new_mtu;
4250         return 0;
4251 }
4252 EXPORT_SYMBOL_GPL(qeth_change_mtu);
4253 
4254 struct net_device_stats *qeth_get_stats(struct net_device *dev)
4255 {
4256         struct qeth_card *card;
4257 
4258         card = dev->ml_priv;
4259 
4260         QETH_CARD_TEXT(card, 5, "getstat");
4261 
4262         return &card->stats;
4263 }
4264 EXPORT_SYMBOL_GPL(qeth_get_stats);
4265 
4266 static int qeth_setadpparms_change_macaddr_cb(struct qeth_card *card,
4267                 struct qeth_reply *reply, unsigned long data)
4268 {
4269         struct qeth_ipa_cmd *cmd;
4270 
4271         QETH_CARD_TEXT(card, 4, "chgmaccb");
4272 
4273         cmd = (struct qeth_ipa_cmd *) data;
4274         if (!card->options.layer2 ||
4275             !(card->info.mac_bits & QETH_LAYER2_MAC_READ)) {
4276                 memcpy(card->dev->dev_addr,
4277                        &cmd->data.setadapterparms.data.change_addr.addr,
4278                        OSA_ADDR_LEN);
4279                 card->info.mac_bits |= QETH_LAYER2_MAC_READ;
4280         }
4281         qeth_default_setadapterparms_cb(card, reply, (unsigned long) cmd);
4282         return 0;
4283 }
4284 
4285 int qeth_setadpparms_change_macaddr(struct qeth_card *card)
4286 {
4287         int rc;
4288         struct qeth_cmd_buffer *iob;
4289         struct qeth_ipa_cmd *cmd;
4290 
4291         QETH_CARD_TEXT(card, 4, "chgmac");
4292 
4293         iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS,
4294                                    sizeof(struct qeth_ipacmd_setadpparms_hdr) +
4295                                    sizeof(struct qeth_change_addr));
4296         if (!iob)
4297                 return -ENOMEM;
4298         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
4299         cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC;
4300         cmd->data.setadapterparms.data.change_addr.addr_size = OSA_ADDR_LEN;
4301         memcpy(&cmd->data.setadapterparms.data.change_addr.addr,
4302                card->dev->dev_addr, OSA_ADDR_LEN);
4303         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_change_macaddr_cb,
4304                                NULL);
4305         return rc;
4306 }
4307 EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr);
4308 
4309 static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card,
4310                 struct qeth_reply *reply, unsigned long data)
4311 {
4312         struct qeth_ipa_cmd *cmd;
4313         struct qeth_set_access_ctrl *access_ctrl_req;
4314         int fallback = *(int *)reply->param;
4315 
4316         QETH_CARD_TEXT(card, 4, "setaccb");
4317 
4318         cmd = (struct qeth_ipa_cmd *) data;
4319         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4320         QETH_DBF_TEXT_(SETUP, 2, "setaccb");
4321         QETH_DBF_TEXT_(SETUP, 2, "%s", card->gdev->dev.kobj.name);
4322         QETH_DBF_TEXT_(SETUP, 2, "rc=%d",
4323                 cmd->data.setadapterparms.hdr.return_code);
4324         if (cmd->data.setadapterparms.hdr.return_code !=
4325                                                 SET_ACCESS_CTRL_RC_SUCCESS)
4326                 QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%s,%d)==%d\n",
4327                                 card->gdev->dev.kobj.name,
4328                                 access_ctrl_req->subcmd_code,
4329                                 cmd->data.setadapterparms.hdr.return_code);
4330         switch (cmd->data.setadapterparms.hdr.return_code) {
4331         case SET_ACCESS_CTRL_RC_SUCCESS:
4332                 if (card->options.isolation == ISOLATION_MODE_NONE) {
4333                         dev_info(&card->gdev->dev,
4334                             "QDIO data connection isolation is deactivated\n");
4335                 } else {
4336                         dev_info(&card->gdev->dev,
4337                             "QDIO data connection isolation is activated\n");
4338                 }
4339                 break;
4340         case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
4341                 QETH_DBF_MESSAGE(2, "%s QDIO data connection isolation already "
4342                                 "deactivated\n", dev_name(&card->gdev->dev));
4343                 if (fallback)
4344                         card->options.isolation = card->options.prev_isolation;
4345                 break;
4346         case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
4347                 QETH_DBF_MESSAGE(2, "%s QDIO data connection isolation already"
4348                                 " activated\n", dev_name(&card->gdev->dev));
4349                 if (fallback)
4350                         card->options.isolation = card->options.prev_isolation;
4351                 break;
4352         case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
4353                 dev_err(&card->gdev->dev, "Adapter does not "
4354                         "support QDIO data connection isolation\n");
4355                 break;
4356         case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
4357                 dev_err(&card->gdev->dev,
4358                         "Adapter is dedicated. "
4359                         "QDIO data connection isolation not supported\n");
4360                 if (fallback)
4361                         card->options.isolation = card->options.prev_isolation;
4362                 break;
4363         case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
4364                 dev_err(&card->gdev->dev,
4365                         "TSO does not permit QDIO data connection isolation\n");
4366                 if (fallback)
4367                         card->options.isolation = card->options.prev_isolation;
4368                 break;
4369         case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED:
4370                 dev_err(&card->gdev->dev, "The adjacent switch port does not "
4371                         "support reflective relay mode\n");
4372                 if (fallback)
4373                         card->options.isolation = card->options.prev_isolation;
4374                 break;
4375         case SET_ACCESS_CTRL_RC_REFLREL_FAILED:
4376                 dev_err(&card->gdev->dev, "The reflective relay mode cannot be "
4377                                         "enabled at the adjacent switch port");
4378                 if (fallback)
4379                         card->options.isolation = card->options.prev_isolation;
4380                 break;
4381         case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED:
4382                 dev_warn(&card->gdev->dev, "Turning off reflective relay mode "
4383                                         "at the adjacent switch failed\n");
4384                 break;
4385         default:
4386                 /* this should never happen */
4387                 if (fallback)
4388                         card->options.isolation = card->options.prev_isolation;
4389                 break;
4390         }
4391         qeth_default_setadapterparms_cb(card, reply, (unsigned long) cmd);
4392         return 0;
4393 }
4394 
4395 static int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
4396                 enum qeth_ipa_isolation_modes isolation, int fallback)
4397 {
4398         int rc;
4399         struct qeth_cmd_buffer *iob;
4400         struct qeth_ipa_cmd *cmd;
4401         struct qeth_set_access_ctrl *access_ctrl_req;
4402 
4403         QETH_CARD_TEXT(card, 4, "setacctl");
4404 
4405         QETH_DBF_TEXT_(SETUP, 2, "setacctl");
4406         QETH_DBF_TEXT_(SETUP, 2, "%s", card->gdev->dev.kobj.name);
4407 
4408         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
4409                                    sizeof(struct qeth_ipacmd_setadpparms_hdr) +
4410                                    sizeof(struct qeth_set_access_ctrl));
4411         if (!iob)
4412                 return -ENOMEM;
4413         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
4414         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4415         access_ctrl_req->subcmd_code = isolation;
4416 
4417         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb,
4418                                &fallback);
4419         QETH_DBF_TEXT_(SETUP, 2, "rc=%d", rc);
4420         return rc;
4421 }
4422 
4423 int qeth_set_access_ctrl_online(struct qeth_card *card, int fallback)
4424 {
4425         int rc = 0;
4426 
4427         QETH_CARD_TEXT(card, 4, "setactlo");
4428 
4429         if ((card->info.type == QETH_CARD_TYPE_OSD ||
4430              card->info.type == QETH_CARD_TYPE_OSX) &&
4431              qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
4432                 rc = qeth_setadpparms_set_access_ctrl(card,
4433                         card->options.isolation, fallback);
4434                 if (rc) {
4435                         QETH_DBF_MESSAGE(3,
4436                                 "IPA(SET_ACCESS_CTRL,%s,%d) sent failed\n",
4437                                 card->gdev->dev.kobj.name,
4438                                 rc);
4439                         rc = -EOPNOTSUPP;
4440                 }
4441         } else if (card->options.isolation != ISOLATION_MODE_NONE) {
4442                 card->options.isolation = ISOLATION_MODE_NONE;
4443 
4444                 dev_err(&card->gdev->dev, "Adapter does not "
4445                         "support QDIO data connection isolation\n");
4446                 rc = -EOPNOTSUPP;
4447         }
4448         return rc;
4449 }
4450 EXPORT_SYMBOL_GPL(qeth_set_access_ctrl_online);
4451 
4452 void qeth_tx_timeout(struct net_device *dev)
4453 {
4454         struct qeth_card *card;
4455 
4456         card = dev->ml_priv;
4457         QETH_CARD_TEXT(card, 4, "txtimeo");
4458         card->stats.tx_errors++;
4459         qeth_schedule_recovery(card);
4460 }
4461 EXPORT_SYMBOL_GPL(qeth_tx_timeout);
4462 
4463 int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum)
4464 {
4465         struct qeth_card *card = dev->ml_priv;
4466         int rc = 0;
4467 
4468         switch (regnum) {
4469         case MII_BMCR: /* Basic mode control register */
4470                 rc = BMCR_FULLDPLX;
4471                 if ((card->info.link_type != QETH_LINK_TYPE_GBIT_ETH) &&
4472                     (card->info.link_type != QETH_LINK_TYPE_OSN) &&
4473                     (card->info.link_type != QETH_LINK_TYPE_10GBIT_ETH))
4474                         rc |= BMCR_SPEED100;
4475                 break;
4476         case MII_BMSR: /* Basic mode status register */
4477                 rc = BMSR_ERCAP | BMSR_ANEGCOMPLETE | BMSR_LSTATUS |
4478                      BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL |
4479                      BMSR_100BASE4;
4480                 break;
4481         case MII_PHYSID1: /* PHYS ID 1 */
4482                 rc = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 8) |
4483                      dev->dev_addr[2];
4484                 rc = (rc >> 5) & 0xFFFF;
4485                 break;
4486         case MII_PHYSID2: /* PHYS ID 2 */
4487                 rc = (dev->dev_addr[2] << 10) & 0xFFFF;
4488                 break;
4489         case MII_ADVERTISE: /* Advertisement control reg */
4490                 rc = ADVERTISE_ALL;
4491                 break;
4492         case MII_LPA: /* Link partner ability reg */
4493                 rc = LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL |
4494                      LPA_100BASE4 | LPA_LPACK;
4495                 break;
4496         case MII_EXPANSION: /* Expansion register */
4497                 break;
4498         case MII_DCOUNTER: /* disconnect counter */
4499                 break;
4500         case MII_FCSCOUNTER: /* false carrier counter */
4501                 break;
4502         case MII_NWAYTEST: /* N-way auto-neg test register */
4503                 break;
4504         case MII_RERRCOUNTER: /* rx error counter */
4505                 rc = card->stats.rx_errors;
4506                 break;
4507         case MII_SREVISION: /* silicon revision */
4508                 break;
4509         case MII_RESV1: /* reserved 1 */
4510                 break;
4511         case MII_LBRERROR: /* loopback, rx, bypass error */
4512                 break;
4513         case MII_PHYADDR: /* physical address */
4514                 break;
4515         case MII_RESV2: /* reserved 2 */
4516                 break;
4517         case MII_TPISTATUS: /* TPI status for 10mbps */
4518                 break;
4519         case MII_NCONFIG: /* network interface config */
4520                 break;
4521         default:
4522                 break;
4523         }
4524         return rc;
4525 }
4526 EXPORT_SYMBOL_GPL(qeth_mdio_read);
4527 
4528 static int qeth_send_ipa_snmp_cmd(struct qeth_card *card,
4529                 struct qeth_cmd_buffer *iob, int len,
4530                 int (*reply_cb)(struct qeth_card *, struct qeth_reply *,
4531                         unsigned long),
4532                 void *reply_param)
4533 {
4534         u16 s1, s2;
4535 
4536         QETH_CARD_TEXT(card, 4, "sendsnmp");
4537 
4538         memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
4539         memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
4540                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
4541         /* adjust PDU length fields in IPA_PDU_HEADER */
4542         s1 = (u32) IPA_PDU_HEADER_SIZE + len;
4543         s2 = (u32) len;
4544         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
4545         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
4546         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
4547         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
4548         return qeth_send_control_data(card, IPA_PDU_HEADER_SIZE + len, iob,
4549                                       reply_cb, reply_param);
4550 }
4551 
4552 static int qeth_snmp_command_cb(struct qeth_card *card,
4553                 struct qeth_reply *reply, unsigned long sdata)
4554 {
4555         struct qeth_ipa_cmd *cmd;
4556         struct qeth_arp_query_info *qinfo;
4557         struct qeth_snmp_cmd *snmp;
4558         unsigned char *data;
4559         __u16 data_len;
4560 
4561         QETH_CARD_TEXT(card, 3, "snpcmdcb");
4562 
4563         cmd = (struct qeth_ipa_cmd *) sdata;
4564         data = (unsigned char *)((char *)cmd - reply->offset);
4565         qinfo = (struct qeth_arp_query_info *) reply->param;
4566         snmp = &cmd->data.setadapterparms.data.snmp;
4567 
4568         if (cmd->hdr.return_code) {
4569                 QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code);
4570                 return 0;
4571         }
4572         if (cmd->data.setadapterparms.hdr.return_code) {
4573                 cmd->hdr.return_code =
4574                         cmd->data.setadapterparms.hdr.return_code;
4575                 QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code);
4576                 return 0;
4577         }
4578         data_len = *((__u16 *)QETH_IPA_PDU_LEN_PDU1(data));
4579         if (cmd->data.setadapterparms.hdr.seq_no == 1)
4580                 data_len -= (__u16)((char *)&snmp->data - (char *)cmd);
4581         else
4582                 data_len -= (__u16)((char *)&snmp->request - (char *)cmd);
4583 
4584         /* check if there is enough room in userspace */
4585         if ((qinfo->udata_len - qinfo->udata_offset) < data_len) {
4586                 QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOMEM);
4587                 cmd->hdr.return_code = IPA_RC_ENOMEM;
4588                 return 0;
4589         }
4590         QETH_CARD_TEXT_(card, 4, "snore%i",
4591                        cmd->data.setadapterparms.hdr.used_total);
4592         QETH_CARD_TEXT_(card, 4, "sseqn%i",
4593                 cmd->data.setadapterparms.hdr.seq_no);
4594         /*copy entries to user buffer*/
4595         if (cmd->data.setadapterparms.hdr.seq_no == 1) {
4596                 memcpy(qinfo->udata + qinfo->udata_offset,
4597                        (char *)snmp,
4598                        data_len + offsetof(struct qeth_snmp_cmd, data));
4599                 qinfo->udata_offset += offsetof(struct qeth_snmp_cmd, data);
4600         } else {
4601                 memcpy(qinfo->udata + qinfo->udata_offset,
4602                        (char *)&snmp->request, data_len);
4603         }
4604         qinfo->udata_offset += data_len;
4605         /* check if all replies received ... */
4606                 QETH_CARD_TEXT_(card, 4, "srtot%i",
4607                                cmd->data.setadapterparms.hdr.used_total);
4608                 QETH_CARD_TEXT_(card, 4, "srseq%i",
4609                                cmd->data.setadapterparms.hdr.seq_no);
4610         if (cmd->data.setadapterparms.hdr.seq_no <
4611             cmd->data.setadapterparms.hdr.used_total)
4612                 return 1;
4613         return 0;
4614 }
4615 
4616 int qeth_snmp_command(struct qeth_card *card, char __user *udata)
4617 {
4618         struct qeth_cmd_buffer *iob;
4619         struct qeth_ipa_cmd *cmd;
4620         struct qeth_snmp_ureq *ureq;
4621         unsigned int req_len;
4622         struct qeth_arp_query_info qinfo = {0, };
4623         int rc = 0;
4624 
4625         QETH_CARD_TEXT(card, 3, "snmpcmd");
4626 
4627         if (card->info.guestlan)
4628                 return -EOPNOTSUPP;
4629 
4630         if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) &&
4631             (!card->options.layer2)) {
4632                 return -EOPNOTSUPP;
4633         }
4634         /* skip 4 bytes (data_len struct member) to get req_len */
4635         if (copy_from_user(&req_len, udata + sizeof(int), sizeof(int)))
4636                 return -EFAULT;
4637         if (req_len > (QETH_BUFSIZE - IPA_PDU_HEADER_SIZE -
4638                        sizeof(struct qeth_ipacmd_hdr) -
4639                        sizeof(struct qeth_ipacmd_setadpparms_hdr)))
4640                 return -EINVAL;
4641         ureq = memdup_user(udata, req_len + sizeof(struct qeth_snmp_ureq_hdr));
4642         if (IS_ERR(ureq)) {
4643                 QETH_CARD_TEXT(card, 2, "snmpnome");
4644                 return PTR_ERR(ureq);
4645         }
4646         qinfo.udata_len = ureq->hdr.data_len;
4647         qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
4648         if (!qinfo.udata) {
4649                 kfree(ureq);
4650                 return -ENOMEM;
4651         }
4652         qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr);
4653 
4654         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL,
4655                                    QETH_SNMP_SETADP_CMDLENGTH + req_len);
4656         if (!iob) {
4657                 rc = -ENOMEM;
4658                 goto out;
4659         }
4660         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
4661         memcpy(&cmd->data.setadapterparms.data.snmp, &ureq->cmd, req_len);
4662         rc = qeth_send_ipa_snmp_cmd(card, iob, QETH_SETADP_BASE_LEN + req_len,
4663                                     qeth_snmp_command_cb, (void *)&qinfo);
4664         if (rc)
4665                 QETH_DBF_MESSAGE(2, "SNMP command failed on %s: (0x%x)\n",
4666                            QETH_CARD_IFNAME(card), rc);
4667         else {
4668                 if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
4669                         rc = -EFAULT;
4670         }
4671 out:
4672         kfree(ureq);
4673         kfree(qinfo.udata);
4674         return rc;
4675 }
4676 EXPORT_SYMBOL_GPL(qeth_snmp_command);
4677 
4678 static int qeth_setadpparms_query_oat_cb(struct qeth_card *card,
4679                 struct qeth_reply *reply, unsigned long data)
4680 {
4681         struct qeth_ipa_cmd *cmd;
4682         struct qeth_qoat_priv *priv;
4683         char *resdata;
4684         int resdatalen;
4685 
4686         QETH_CARD_TEXT(card, 3, "qoatcb");
4687 
4688         cmd = (struct qeth_ipa_cmd *)data;
4689         priv = (struct qeth_qoat_priv *)reply->param;
4690         resdatalen = cmd->data.setadapterparms.hdr.cmdlength;
4691         resdata = (char *)data + 28;
4692 
4693         if (resdatalen > (priv->buffer_len - priv->response_len)) {
4694                 cmd->hdr.return_code = IPA_RC_FFFF;
4695                 return 0;
4696         }
4697 
4698         memcpy((priv->buffer + priv->response_len), resdata,
4699                 resdatalen);
4700         priv->response_len += resdatalen;
4701 
4702         if (cmd->data.setadapterparms.hdr.seq_no <
4703             cmd->data.setadapterparms.hdr.used_total)
4704                 return 1;
4705         return 0;
4706 }
4707 
4708 int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
4709 {
4710         int rc = 0;
4711         struct qeth_cmd_buffer *iob;
4712         struct qeth_ipa_cmd *cmd;
4713         struct qeth_query_oat *oat_req;
4714         struct qeth_query_oat_data oat_data;
4715         struct qeth_qoat_priv priv;
4716         void __user *tmp;
4717 
4718         QETH_CARD_TEXT(card, 3, "qoatcmd");
4719 
4720         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT)) {
4721                 rc = -EOPNOTSUPP;
4722                 goto out;
4723         }
4724 
4725         if (copy_from_user(&oat_data, udata,
4726             sizeof(struct qeth_query_oat_data))) {
4727                         rc = -EFAULT;
4728                         goto out;
4729         }
4730 
4731         priv.buffer_len = oat_data.buffer_len;
4732         priv.response_len = 0;
4733         priv.buffer =  kzalloc(oat_data.buffer_len, GFP_KERNEL);
4734         if (!priv.buffer) {
4735                 rc = -ENOMEM;
4736                 goto out;
4737         }
4738 
4739         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4740                                    sizeof(struct qeth_ipacmd_setadpparms_hdr) +
4741                                    sizeof(struct qeth_query_oat));
4742         if (!iob) {
4743                 rc = -ENOMEM;
4744                 goto out_free;
4745         }
4746         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
4747         oat_req = &cmd->data.setadapterparms.data.query_oat;
4748         oat_req->subcmd_code = oat_data.command;
4749 
4750         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb,
4751                                &priv);
4752         if (!rc) {
4753                 if (is_compat_task())
4754                         tmp = compat_ptr(oat_data.ptr);
4755                 else
4756                         tmp = (void __user *)(unsigned long)oat_data.ptr;
4757 
4758                 if (copy_to_user(tmp, priv.buffer,
4759                     priv.response_len)) {
4760                         rc = -EFAULT;
4761                         goto out_free;
4762                 }
4763 
4764                 oat_data.response_len = priv.response_len;
4765 
4766                 if (copy_to_user(udata, &oat_data,
4767                     sizeof(struct qeth_query_oat_data)))
4768                         rc = -EFAULT;
4769         } else
4770                 if (rc == IPA_RC_FFFF)
4771                         rc = -EFAULT;
4772 
4773 out_free:
4774         kfree(priv.buffer);
4775 out:
4776         return rc;
4777 }
4778 EXPORT_SYMBOL_GPL(qeth_query_oat_command);
4779 
4780 static int qeth_query_card_info_cb(struct qeth_card *card,
4781                                    struct qeth_reply *reply, unsigned long data)
4782 {
4783         struct qeth_ipa_cmd *cmd;
4784         struct qeth_query_card_info *card_info;
4785         struct carrier_info *carrier_info;
4786 
4787         QETH_CARD_TEXT(card, 2, "qcrdincb");
4788         carrier_info = (struct carrier_info *)reply->param;
4789         cmd = (struct qeth_ipa_cmd *)data;
4790         card_info = &cmd->data.setadapterparms.data.card_info;
4791         if (cmd->data.setadapterparms.hdr.return_code == 0) {
4792                 carrier_info->card_type = card_info->card_type;
4793                 carrier_info->port_mode = card_info->port_mode;
4794                 carrier_info->port_speed = card_info->port_speed;
4795         }
4796 
4797         qeth_default_setadapterparms_cb(card, reply, (unsigned long) cmd);
4798         return 0;
4799 }
4800 
4801 static int qeth_query_card_info(struct qeth_card *card,
4802                                 struct carrier_info *carrier_info)
4803 {
4804         struct qeth_cmd_buffer *iob;
4805 
4806         QETH_CARD_TEXT(card, 2, "qcrdinfo");
4807         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_CARD_INFO))
4808                 return -EOPNOTSUPP;
4809         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_CARD_INFO,
4810                 sizeof(struct qeth_ipacmd_setadpparms_hdr));
4811         if (!iob)
4812                 return -ENOMEM;
4813         return qeth_send_ipa_cmd(card, iob, qeth_query_card_info_cb,
4814                                         (void *)carrier_info);
4815 }
4816 
4817 static inline int qeth_get_qdio_q_format(struct qeth_card *card)
4818 {
4819         switch (card->info.type) {
4820         case QETH_CARD_TYPE_IQD:
4821                 return 2;
4822         default:
4823                 return 0;
4824         }
4825 }
4826 
4827 static void qeth_determine_capabilities(struct qeth_card *card)
4828 {
4829         int rc;
4830         int length;
4831         char *prcd;
4832         struct ccw_device *ddev;
4833         int ddev_offline = 0;
4834 
4835         QETH_DBF_TEXT(SETUP, 2, "detcapab");
4836         ddev = CARD_DDEV(card);
4837         if (!ddev->online) {
4838                 ddev_offline = 1;
4839                 rc = ccw_device_set_online(ddev);
4840                 if (rc) {
4841                         QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
4842                         goto out;
4843                 }
4844         }
4845 
4846         rc = qeth_read_conf_data(card, (void **) &prcd, &length);
4847         if (rc) {
4848                 QETH_DBF_MESSAGE(2, "%s qeth_read_conf_data returned %i\n",
4849                         dev_name(&card->gdev->dev), rc);
4850                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
4851                 goto out_offline;
4852         }
4853         qeth_configure_unitaddr(card, prcd);
4854         if (ddev_offline)
4855                 qeth_configure_blkt_default(card, prcd);
4856         kfree(prcd);
4857 
4858         rc = qdio_get_ssqd_desc(ddev, &card->ssqd);
4859         if (rc)
4860                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
4861 
4862         QETH_DBF_TEXT_(SETUP, 2, "qfmt%d", card->ssqd.qfmt);
4863         QETH_DBF_TEXT_(SETUP, 2, "%d", card->ssqd.qdioac1);
4864         QETH_DBF_TEXT_(SETUP, 2, "%d", card->ssqd.qdioac3);
4865         QETH_DBF_TEXT_(SETUP, 2, "icnt%d", card->ssqd.icnt);
4866         if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) ||
4867             ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) ||
4868             ((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) {
4869                 dev_info(&card->gdev->dev,
4870                         "Completion Queueing supported\n");
4871         } else {
4872                 card->options.cq = QETH_CQ_NOTAVAILABLE;
4873         }
4874 
4875 
4876 out_offline:
4877         if (ddev_offline == 1)
4878                 ccw_device_set_offline(ddev);
4879 out:
4880         return;
4881 }
4882 
4883 static inline void qeth_qdio_establish_cq(struct qeth_card *card,
4884         struct qdio_buffer **in_sbal_ptrs,
4885         void (**queue_start_poll) (struct ccw_device *, int, unsigned long)) {
4886         int i;
4887 
4888         if (card->options.cq == QETH_CQ_ENABLED) {
4889                 int offset = QDIO_MAX_BUFFERS_PER_Q *
4890                              (card->qdio.no_in_queues - 1);
4891                 i = QDIO_MAX_BUFFERS_PER_Q * (card->qdio.no_in_queues - 1);
4892                 for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i) {
4893                         in_sbal_ptrs[offset + i] = (struct qdio_buffer *)
4894                                 virt_to_phys(card->qdio.c_q->bufs[i].buffer);
4895                 }
4896 
4897                 queue_start_poll[card->qdio.no_in_queues - 1] = NULL;
4898         }
4899 }
4900 
4901 static int qeth_qdio_establish(struct qeth_card *card)
4902 {
4903         struct qdio_initialize init_data;
4904         char *qib_param_field;
4905         struct qdio_buffer **in_sbal_ptrs;
4906         void (**queue_start_poll) (struct ccw_device *, int, unsigned long);
4907         struct qdio_buffer **out_sbal_ptrs;
4908         int i, j, k;
4909         int rc = 0;
4910 
4911         QETH_DBF_TEXT(SETUP, 2, "qdioest");
4912 
4913         qib_param_field = kzalloc(QDIO_MAX_BUFFERS_PER_Q * sizeof(char),
4914                               GFP_KERNEL);
4915         if (!qib_param_field) {
4916                 rc =  -ENOMEM;
4917                 goto out_free_nothing;
4918         }
4919 
4920         qeth_create_qib_param_field(card, qib_param_field);
4921         qeth_create_qib_param_field_blkt(card, qib_param_field);
4922 
4923         in_sbal_ptrs = kzalloc(card->qdio.no_in_queues *
4924                                QDIO_MAX_BUFFERS_PER_Q * sizeof(void *),
4925                                GFP_KERNEL);
4926         if (!in_sbal_ptrs) {
4927                 rc = -ENOMEM;
4928                 goto out_free_qib_param;
4929         }
4930         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i) {
4931                 in_sbal_ptrs[i] = (struct qdio_buffer *)
4932                         virt_to_phys(card->qdio.in_q->bufs[i].buffer);
4933         }
4934 
4935         queue_start_poll = kzalloc(sizeof(void *) * card->qdio.no_in_queues,
4936                                    GFP_KERNEL);
4937         if (!queue_start_poll) {
4938                 rc = -ENOMEM;
4939                 goto out_free_in_sbals;
4940         }
4941         for (i = 0; i < card->qdio.no_in_queues; ++i)
4942                 queue_start_poll[i] = card->discipline->start_poll;
4943 
4944         qeth_qdio_establish_cq(card, in_sbal_ptrs, queue_start_poll);
4945 
4946         out_sbal_ptrs =
4947                 kzalloc(card->qdio.no_out_queues * QDIO_MAX_BUFFERS_PER_Q *
4948                         sizeof(void *), GFP_KERNEL);
4949         if (!out_sbal_ptrs) {
4950                 rc = -ENOMEM;
4951                 goto out_free_queue_start_poll;
4952         }
4953         for (i = 0, k = 0; i < card->qdio.no_out_queues; ++i)
4954                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j, ++k) {
4955                         out_sbal_ptrs[k] = (struct qdio_buffer *)virt_to_phys(
4956                                 card->qdio.out_qs[i]->bufs[j]->buffer);
4957                 }
4958 
4959         memset(&init_data, 0, sizeof(struct qdio_initialize));
4960         init_data.cdev                   = CARD_DDEV(card);
4961         init_data.q_format               = qeth_get_qdio_q_format(card);
4962         init_data.qib_param_field_format = 0;
4963         init_data.qib_param_field        = qib_param_field;
4964         init_data.no_input_qs            = card->qdio.no_in_queues;
4965         init_data.no_output_qs           = card->qdio.no_out_queues;
4966         init_data.input_handler          = card->discipline->input_handler;
4967         init_data.output_handler         = card->discipline->output_handler;
4968         init_data.queue_start_poll_array = queue_start_poll;
4969         init_data.int_parm               = (unsigned long) card;
4970         init_data.input_sbal_addr_array  = (void **) in_sbal_ptrs;
4971         init_data.output_sbal_addr_array = (void **) out_sbal_ptrs;
4972         init_data.output_sbal_state_array = card->qdio.out_bufstates;
4973         init_data.scan_threshold =
4974                 (card->info.type == QETH_CARD_TYPE_IQD) ? 1 : 32;
4975 
4976         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED,
4977                 QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) {
4978                 rc = qdio_allocate(&init_data);
4979                 if (rc) {
4980                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
4981                         goto out;
4982                 }
4983                 rc = qdio_establish(&init_data);
4984                 if (rc) {
4985                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
4986                         qdio_free(CARD_DDEV(card));
4987                 }
4988         }
4989 
4990         switch (card->options.cq) {
4991         case QETH_CQ_ENABLED:
4992                 dev_info(&card->gdev->dev, "Completion Queue support enabled");
4993                 break;
4994         case QETH_CQ_DISABLED:
4995                 dev_info(&card->gdev->dev, "Completion Queue support disabled");
4996                 break;
4997         default:
4998                 break;
4999         }
5000 out:
5001         kfree(out_sbal_ptrs);
5002 out_free_queue_start_poll:
5003         kfree(queue_start_poll);
5004 out_free_in_sbals:
5005         kfree(in_sbal_ptrs);
5006 out_free_qib_param:
5007         kfree(qib_param_field);
5008 out_free_nothing:
5009         return rc;
5010 }
5011 
5012 static void qeth_core_free_card(struct qeth_card *card)
5013 {
5014 
5015         QETH_DBF_TEXT(SETUP, 2, "freecrd");
5016         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
5017         qeth_clean_channel(&card->read);
5018         qeth_clean_channel(&card->write);
5019         if (card->dev)
5020                 free_netdev(card->dev);
5021         kfree(card->ip_tbd_list);
5022         qeth_free_qdio_buffers(card);
5023         unregister_service_level(&card->qeth_service_level);
5024         kfree(card);
5025 }
5026 
5027 void qeth_trace_features(struct qeth_card *card)
5028 {
5029         QETH_CARD_TEXT(card, 2, "features");
5030         QETH_CARD_TEXT_(card, 2, "%x", card->options.ipa4.supported_funcs);
5031         QETH_CARD_TEXT_(card, 2, "%x", card->options.ipa4.enabled_funcs);
5032         QETH_CARD_TEXT_(card, 2, "%x", card->options.ipa6.supported_funcs);
5033         QETH_CARD_TEXT_(card, 2, "%x", card->options.ipa6.enabled_funcs);
5034         QETH_CARD_TEXT_(card, 2, "%x", card->options.adp.supported_funcs);
5035         QETH_CARD_TEXT_(card, 2, "%x", card->options.adp.enabled_funcs);
5036         QETH_CARD_TEXT_(card, 2, "%x", card->info.diagass_support);
5037 }
5038 EXPORT_SYMBOL_GPL(qeth_trace_features);
5039 
5040 static struct ccw_device_id qeth_ids[] = {
5041         {CCW_DEVICE_DEVTYPE(0x1731, 0x01, 0x1732, 0x01),
5042                                         .driver_info = QETH_CARD_TYPE_OSD},
5043         {CCW_DEVICE_DEVTYPE(0x1731, 0x05, 0x1732, 0x05),
5044                                         .driver_info = QETH_CARD_TYPE_IQD},
5045         {CCW_DEVICE_DEVTYPE(0x1731, 0x06, 0x1732, 0x06),
5046                                         .driver_info = QETH_CARD_TYPE_OSN},
5047         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x03),
5048                                         .driver_info = QETH_CARD_TYPE_OSM},
5049         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02),
5050                                         .driver_info = QETH_CARD_TYPE_OSX},
5051         {},
5052 };
5053 MODULE_DEVICE_TABLE(ccw, qeth_ids);
5054 
5055 static struct ccw_driver qeth_ccw_driver = {
5056         .driver = {
5057                 .owner = THIS_MODULE,
5058                 .name = "qeth",
5059         },
5060         .ids = qeth_ids,
5061         .probe = ccwgroup_probe_ccwdev,
5062         .remove = ccwgroup_remove_ccwdev,
5063 };
5064 
5065 int qeth_core_hardsetup_card(struct qeth_card *card)
5066 {
5067         int retries = 3;
5068         int rc;
5069 
5070         QETH_DBF_TEXT(SETUP, 2, "hrdsetup");
5071         atomic_set(&card->force_alloc_skb, 0);
5072         qeth_update_from_chp_desc(card);
5073 retry:
5074         if (retries < 3)
5075                 QETH_DBF_MESSAGE(2, "%s Retrying to do IDX activates.\n",
5076                         dev_name(&card->gdev->dev));
5077         rc = qeth_qdio_clear_card(card, card->info.type != QETH_CARD_TYPE_IQD);
5078         ccw_device_set_offline(CARD_DDEV(card));
5079         ccw_device_set_offline(CARD_WDEV(card));
5080         ccw_device_set_offline(CARD_RDEV(card));
5081         qdio_free(CARD_DDEV(card));
5082         rc = ccw_device_set_online(CARD_RDEV(card));
5083         if (rc)
5084                 goto retriable;
5085         rc = ccw_device_set_online(CARD_WDEV(card));
5086         if (rc)
5087                 goto retriable;
5088         rc = ccw_device_set_online(CARD_DDEV(card));
5089         if (rc)
5090                 goto retriable;
5091 retriable:
5092         if (rc == -ERESTARTSYS) {
5093                 QETH_DBF_TEXT(SETUP, 2, "break1");
5094                 return rc;
5095         } else if (rc) {
5096                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
5097                 if (--retries < 0)
5098                         goto out;
5099                 else
5100                         goto retry;
5101         }
5102         qeth_determine_capabilities(card);
5103         qeth_init_tokens(card);
5104         qeth_init_func_level(card);
5105         rc = qeth_idx_activate_channel(&card->read, qeth_idx_read_cb);
5106         if (rc == -ERESTARTSYS) {
5107                 QETH_DBF_TEXT(SETUP, 2, "break2");
5108                 return rc;
5109         } else if (rc) {
5110                 QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
5111                 if (--retries < 0)
5112                         goto out;
5113                 else
5114                         goto retry;
5115         }
5116         rc = qeth_idx_activate_channel(&card->write, qeth_idx_write_cb);
5117         if (rc == -ERESTARTSYS) {
5118                 QETH_DBF_TEXT(SETUP, 2, "break3");
5119                 return rc;
5120         } else if (rc) {
5121                 QETH_DBF_TEXT_(SETUP, 2, "4err%d", rc);
5122                 if (--retries < 0)
5123                         goto out;
5124                 else
5125                         goto retry;
5126         }
5127         card->read_or_write_problem = 0;
5128         rc = qeth_mpc_initialize(card);
5129         if (rc) {
5130                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
5131                 goto out;
5132         }
5133 
5134         card->options.ipa4.supported_funcs = 0;
5135         card->options.adp.supported_funcs = 0;
5136         card->options.sbp.supported_funcs = 0;
5137         card->info.diagass_support = 0;
5138         rc = qeth_query_ipassists(card, QETH_PROT_IPV4);
5139         if (rc == -ENOMEM)
5140                 goto out;
5141         if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
5142                 rc = qeth_query_setadapterparms(card);
5143                 if (rc < 0) {
5144                         QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
5145                         goto out;
5146                 }
5147         }
5148         if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
5149                 rc = qeth_query_setdiagass(card);
5150                 if (rc < 0) {
5151                         QETH_DBF_TEXT_(SETUP, 2, "7err%d", rc);
5152                         goto out;
5153                 }
5154         }
5155         return 0;
5156 out:
5157         dev_warn(&card->gdev->dev, "The qeth device driver failed to recover "
5158                 "an error on the device\n");
5159         QETH_DBF_MESSAGE(2, "%s Initialization in hardsetup failed! rc=%d\n",
5160                 dev_name(&card->gdev->dev), rc);
5161         return rc;
5162 }
5163 EXPORT_SYMBOL_GPL(qeth_core_hardsetup_card);
5164 
5165 static inline int qeth_create_skb_frag(struct qeth_qdio_buffer *qethbuffer,
5166                 struct qdio_buffer_element *element,
5167                 struct sk_buff **pskb, int offset, int *pfrag, int data_len)
5168 {
5169         struct page *page = virt_to_page(element->addr);
5170         if (*pskb == NULL) {
5171                 if (qethbuffer->rx_skb) {
5172                         /* only if qeth_card.options.cq == QETH_CQ_ENABLED */
5173                         *pskb = qethbuffer->rx_skb;
5174                         qethbuffer->rx_skb = NULL;
5175                 } else {
5176                         *pskb = dev_alloc_skb(QETH_RX_PULL_LEN + ETH_HLEN);
5177                         if (!(*pskb))
5178                                 return -ENOMEM;
5179                 }
5180 
5181                 skb_reserve(*pskb, ETH_HLEN);
5182                 if (data_len <= QETH_RX_PULL_LEN) {
5183                         memcpy(skb_put(*pskb, data_len), element->addr + offset,
5184                                 data_len);
5185                 } else {
5186                         get_page(page);
5187                         memcpy(skb_put(*pskb, QETH_RX_PULL_LEN),
5188                                element->addr + offset, QETH_RX_PULL_LEN);
5189                         skb_fill_page_desc(*pskb, *pfrag, page,
5190                                 offset + QETH_RX_PULL_LEN,
5191                                 data_len - QETH_RX_PULL_LEN);
5192                         (*pskb)->data_len += data_len - QETH_RX_PULL_LEN;
5193                         (*pskb)->len      += data_len - QETH_RX_PULL_LEN;
5194                         (*pskb)->truesize += data_len - QETH_RX_PULL_LEN;
5195                         (*pfrag)++;
5196                 }
5197         } else {
5198                 get_page(page);
5199                 skb_fill_page_desc(*pskb, *pfrag, page, offset, data_len);
5200                 (*pskb)->data_len += data_len;
5201                 (*pskb)->len      += data_len;
5202                 (*pskb)->truesize += data_len;
5203                 (*pfrag)++;
5204         }
5205 
5206 
5207         return 0;
5208 }
5209 
5210 static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale)
5211 {
5212         return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY);
5213 }
5214 
5215 struct sk_buff *qeth_core_get_next_skb(struct qeth_card *card,
5216                 struct qeth_qdio_buffer *qethbuffer,
5217                 struct qdio_buffer_element **__element, int *__offset,
5218                 struct qeth_hdr **hdr)
5219 {
5220         struct qdio_buffer_element *element = *__element;
5221         struct qdio_buffer *buffer = qethbuffer->buffer;
5222         int offset = *__offset;
5223         struct sk_buff *skb = NULL;
5224         int skb_len = 0;
5225         void *data_ptr;
5226         int data_len;
5227         int headroom = 0;
5228         int use_rx_sg = 0;
5229         int frag = 0;
5230 
5231         /* qeth_hdr must not cross element boundaries */
5232         if (element->length < offset + sizeof(struct qeth_hdr)) {
5233                 if (qeth_is_last_sbale(element))
5234                         return NULL;
5235                 element++;
5236                 offset = 0;
5237                 if (element->length < sizeof(struct qeth_hdr))
5238                         return NULL;
5239         }
5240         *hdr = element->addr + offset;
5241 
5242         offset += sizeof(struct qeth_hdr);
5243         switch ((*hdr)->hdr.l2.id) {
5244         case QETH_HEADER_TYPE_LAYER2:
5245                 skb_len = (*hdr)->hdr.l2.pkt_length;
5246                 break;
5247         case QETH_HEADER_TYPE_LAYER3:
5248                 skb_len = (*hdr)->hdr.l3.length;
5249                 headroom = ETH_HLEN;
5250                 break;
5251         case QETH_HEADER_TYPE_OSN:
5252                 skb_len = (*hdr)->hdr.osn.pdu_length;
5253                 headroom = sizeof(struct qeth_hdr);
5254                 break;
5255         default:
5256                 break;
5257         }
5258 
5259         if (!skb_len)
5260                 return NULL;
5261 
5262         if (((skb_len >= card->options.rx_sg_cb) &&
5263              (!(card->info.type == QETH_CARD_TYPE_OSN)) &&
5264              (!atomic_read(&card->force_alloc_skb))) ||
5265             (card->options.cq == QETH_CQ_ENABLED)) {
5266                 use_rx_sg = 1;
5267         } else {
5268                 skb = dev_alloc_skb(skb_len + headroom);
5269                 if (!skb)
5270                         goto no_mem;
5271                 if (headroom)
5272                         skb_reserve(skb, headroom);
5273         }
5274 
5275         data_ptr = element->addr + offset;
5276         while (skb_len) {
5277                 data_len = min(skb_len, (int)(element->length - offset));
5278                 if (data_len) {
5279                         if (use_rx_sg) {
5280                                 if (qeth_create_skb_frag(qethbuffer, element,
5281                                     &skb, offset, &frag, data_len))
5282                                         goto no_mem;
5283                         } else {
5284                                 memcpy(skb_put(skb, data_len), data_ptr,
5285                                         data_len);
5286                         }
5287                 }
5288                 skb_len -= data_len;
5289                 if (skb_len) {
5290                         if (qeth_is_last_sbale(element)) {
5291                                 QETH_CARD_TEXT(card, 4, "unexeob");
5292                                 QETH_CARD_HEX(card, 2, buffer, sizeof(void *));
5293                                 dev_kfree_skb_any(skb);
5294                                 card->stats.rx_errors++;
5295                                 return NULL;
5296                         }
5297                         element++;
5298                         offset = 0;
5299                         data_ptr = element->addr;
5300                 } else {
5301                         offset += data_len;
5302                 }
5303         }
5304         *__element = element;
5305         *__offset = offset;
5306         if (use_rx_sg && card->options.performance_stats) {
5307                 card->perf_stats.sg_skbs_rx++;
5308                 card->perf_stats.sg_frags_rx += skb_shinfo(skb)->nr_frags;
5309         }
5310         return skb;
5311 no_mem:
5312         if (net_ratelimit()) {
5313                 QETH_CARD_TEXT(card, 2, "noskbmem");
5314         }
5315         card->stats.rx_dropped++;
5316         return NULL;
5317 }
5318 EXPORT_SYMBOL_GPL(qeth_core_get_next_skb);
5319 
5320 static void qeth_unregister_dbf_views(void)
5321 {
5322         int x;
5323         for (x = 0; x < QETH_DBF_INFOS; x++) {
5324                 debug_unregister(qeth_dbf[x].id);
5325                 qeth_dbf[x].id = NULL;
5326         }
5327 }
5328 
5329 void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...)
5330 {
5331         char dbf_txt_buf[32];
5332         va_list args;
5333 
5334         if (!debug_level_enabled(id, level))
5335                 return;
5336         va_start(args, fmt);
5337         vsnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
5338         va_end(args);
5339         debug_text_event(id, level, dbf_txt_buf);
5340 }
5341 EXPORT_SYMBOL_GPL(qeth_dbf_longtext);
5342 
5343 static int qeth_register_dbf_views(void)
5344 {
5345         int ret;
5346         int x;
5347 
5348         for (x = 0; x < QETH_DBF_INFOS; x++) {
5349                 /* register the areas */
5350                 qeth_dbf[x].id = debug_register(qeth_dbf[x].name,
5351                                                 qeth_dbf[x].pages,
5352                                                 qeth_dbf[x].areas,
5353                                                 qeth_dbf[x].len);
5354                 if (qeth_dbf[x].id == NULL) {
5355                         qeth_unregister_dbf_views();
5356                         return -ENOMEM;
5357                 }
5358 
5359                 /* register a view */
5360                 ret = debug_register_view(qeth_dbf[x].id, qeth_dbf[x].view);
5361                 if (ret) {
5362                         qeth_unregister_dbf_views();
5363                         return ret;
5364                 }
5365 
5366                 /* set a passing level */
5367                 debug_set_level(qeth_dbf[x].id, qeth_dbf[x].level);
5368         }
5369 
5370         return 0;
5371 }
5372 
5373 int qeth_core_load_discipline(struct qeth_card *card,
5374                 enum qeth_discipline_id discipline)
5375 {
5376         int rc = 0;
5377         mutex_lock(&qeth_mod_mutex);
5378         switch (discipline) {
5379         case QETH_DISCIPLINE_LAYER3:
5380                 card->discipline = try_then_request_module(
5381                         symbol_get(qeth_l3_discipline), "qeth_l3");
5382                 break;
5383         case QETH_DISCIPLINE_LAYER2:
5384                 card->discipline = try_then_request_module(
5385                         symbol_get(qeth_l2_discipline), "qeth_l2");
5386                 break;
5387         }
5388         if (!card->discipline) {
5389                 dev_err(&card->gdev->dev, "There is no kernel module to "
5390                         "support discipline %d\n", discipline);
5391                 rc = -EINVAL;
5392         }
5393         mutex_unlock(&qeth_mod_mutex);
5394         return rc;
5395 }
5396 
5397 void qeth_core_free_discipline(struct qeth_card *card)
5398 {
5399         if (card->options.layer2)
5400                 symbol_put(qeth_l2_discipline);
5401         else
5402                 symbol_put(qeth_l3_discipline);
5403         card->discipline = NULL;
5404 }
5405 
5406 static const struct device_type qeth_generic_devtype = {
5407         .name = "qeth_generic",
5408         .groups = qeth_generic_attr_groups,
5409 };
5410 static const struct device_type qeth_osn_devtype = {
5411         .name = "qeth_osn",
5412         .groups = qeth_osn_attr_groups,
5413 };
5414 
5415 #define DBF_NAME_LEN    20
5416 
5417 struct qeth_dbf_entry {
5418         char dbf_name[DBF_NAME_LEN];
5419         debug_info_t *dbf_info;
5420         struct list_head dbf_list;
5421 };
5422 
5423 static LIST_HEAD(qeth_dbf_list);
5424 static DEFINE_MUTEX(qeth_dbf_list_mutex);
5425 
5426 static debug_info_t *qeth_get_dbf_entry(char *name)
5427 {
5428         struct qeth_dbf_entry *entry;
5429         debug_info_t *rc = NULL;
5430 
5431         mutex_lock(&qeth_dbf_list_mutex);
5432         list_for_each_entry(entry, &qeth_dbf_list, dbf_list) {
5433                 if (strcmp(entry->dbf_name, name) == 0) {
5434                         rc = entry->dbf_info;
5435                         break;
5436                 }
5437         }
5438         mutex_unlock(&qeth_dbf_list_mutex);
5439         return rc;
5440 }
5441 
5442 static int qeth_add_dbf_entry(struct qeth_card *card, char *name)
5443 {
5444         struct qeth_dbf_entry *new_entry;
5445 
5446         card->debug = debug_register(name, 2, 1, 8);
5447         if (!card->debug) {
5448                 QETH_DBF_TEXT_(SETUP, 2, "%s", "qcdbf");
5449                 goto err;
5450         }
5451         if (debug_register_view(card->debug, &debug_hex_ascii_view))
5452                 goto err_dbg;
5453         new_entry = kzalloc(sizeof(struct qeth_dbf_entry), GFP_KERNEL);
5454         if (!new_entry)
5455                 goto err_dbg;
5456         strncpy(new_entry->dbf_name, name, DBF_NAME_LEN);
5457         new_entry->dbf_info = card->debug;
5458         mutex_lock(&qeth_dbf_list_mutex);
5459         list_add(&new_entry->dbf_list, &qeth_dbf_list);
5460         mutex_unlock(&qeth_dbf_list_mutex);
5461 
5462         return 0;
5463 
5464 err_dbg:
5465         debug_unregister(card->debug);
5466 err:
5467         return -ENOMEM;
5468 }
5469 
5470 static void qeth_clear_dbf_list(void)
5471 {
5472         struct qeth_dbf_entry *entry, *tmp;
5473 
5474         mutex_lock(&qeth_dbf_list_mutex);
5475         list_for_each_entry_safe(entry, tmp, &qeth_dbf_list, dbf_list) {
5476                 list_del(&entry->dbf_list);
5477                 debug_unregister(entry->dbf_info);
5478                 kfree(entry);
5479         }
5480         mutex_unlock(&qeth_dbf_list_mutex);
5481 }
5482 
5483 static int qeth_core_probe_device(struct ccwgroup_device *gdev)
5484 {
5485         struct qeth_card *card;
5486         struct device *dev;
5487         int rc;
5488         unsigned long flags;
5489         char dbf_name[DBF_NAME_LEN];
5490 
5491         QETH_DBF_TEXT(SETUP, 2, "probedev");
5492 
5493         dev = &gdev->dev;
5494         if (!get_device(dev))
5495                 return -ENODEV;
5496 
5497         QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev));
5498 
5499         card = qeth_alloc_card();
5500         if (!card) {
5501                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM);
5502                 rc = -ENOMEM;
5503                 goto err_dev;
5504         }
5505 
5506         snprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
5507                 dev_name(&gdev->dev));
5508         card->debug = qeth_get_dbf_entry(dbf_name);
5509         if (!card->debug) {
5510                 rc = qeth_add_dbf_entry(card, dbf_name);
5511                 if (rc)
5512                         goto err_card;
5513         }
5514 
5515         card->read.ccwdev  = gdev->cdev[0];
5516         card->write.ccwdev = gdev->cdev[1];
5517         card->data.ccwdev  = gdev->cdev[2];
5518         dev_set_drvdata(&gdev->dev, card);
5519         card->gdev = gdev;
5520         gdev->cdev[0]->handler = qeth_irq;
5521         gdev->cdev[1]->handler = qeth_irq;
5522         gdev->cdev[2]->handler = qeth_irq;
5523 
5524         rc = qeth_determine_card_type(card);
5525         if (rc) {
5526                 QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
5527                 goto err_card;
5528         }
5529         rc = qeth_setup_card(card);
5530         if (rc) {
5531                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
5532                 goto err_card;
5533         }
5534 
5535         if (card->info.type == QETH_CARD_TYPE_OSN)
5536                 gdev->dev.type = &qeth_osn_devtype;
5537         else
5538                 gdev->dev.type = &qeth_generic_devtype;
5539 
5540         switch (card->info.type) {
5541         case QETH_CARD_TYPE_OSN:
5542         case QETH_CARD_TYPE_OSM:
5543                 rc = qeth_core_load_discipline(card, QETH_DISCIPLINE_LAYER2);
5544                 if (rc)
5545                         goto err_card;
5546                 rc = card->discipline->setup(card->gdev);
5547                 if (rc)
5548                         goto err_disc;
5549         case QETH_CARD_TYPE_OSD:
5550         case QETH_CARD_TYPE_OSX:
5551         default:
5552                 break;
5553         }
5554 
5555         write_lock_irqsave(&qeth_core_card_list.rwlock, flags);
5556         list_add_tail(&card->list, &qeth_core_card_list.list);
5557         write_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
5558 
5559         qeth_determine_capabilities(card);
5560         return 0;
5561 
5562 err_disc:
5563         qeth_core_free_discipline(card);
5564 err_card:
5565         qeth_core_free_card(card);
5566 err_dev:
5567         put_device(dev);
5568         return rc;
5569 }
5570 
5571 static void qeth_core_remove_device(struct ccwgroup_device *gdev)
5572 {
5573         unsigned long flags;
5574         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5575 
5576         QETH_DBF_TEXT(SETUP, 2, "removedv");
5577 
5578         if (card->discipline) {
5579                 card->discipline->remove(gdev);
5580                 qeth_core_free_discipline(card);
5581         }
5582 
5583         write_lock_irqsave(&qeth_core_card_list.rwlock, flags);
5584         list_del(&card->list);
5585         write_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
5586         qeth_core_free_card(card);
5587         dev_set_drvdata(&gdev->dev, NULL);
5588         put_device(&gdev->dev);
5589         return;
5590 }
5591 
5592 static int qeth_core_set_online(struct ccwgroup_device *gdev)
5593 {
5594         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5595         int rc = 0;
5596         int def_discipline;
5597 
5598         if (!card->discipline) {
5599                 if (card->info.type == QETH_CARD_TYPE_IQD)
5600                         def_discipline = QETH_DISCIPLINE_LAYER3;
5601                 else
5602                         def_discipline = QETH_DISCIPLINE_LAYER2;
5603                 rc = qeth_core_load_discipline(card, def_discipline);
5604                 if (rc)
5605                         goto err;
5606                 rc = card->discipline->setup(card->gdev);
5607                 if (rc)
5608                         goto err;
5609         }
5610         rc = card->discipline->set_online(gdev);
5611 err:
5612         return rc;
5613 }
5614 
5615 static int qeth_core_set_offline(struct ccwgroup_device *gdev)
5616 {
5617         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5618         return card->discipline->set_offline(gdev);
5619 }
5620 
5621 static void qeth_core_shutdown(struct ccwgroup_device *gdev)
5622 {
5623         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5624         if (card->discipline && card->discipline->shutdown)
5625                 card->discipline->shutdown(gdev);
5626 }
5627 
5628 static int qeth_core_prepare(struct ccwgroup_device *gdev)
5629 {
5630         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5631         if (card->discipline && card->discipline->prepare)
5632                 return card->discipline->prepare(gdev);
5633         return 0;
5634 }
5635 
5636 static void qeth_core_complete(struct ccwgroup_device *gdev)
5637 {
5638         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5639         if (card->discipline && card->discipline->complete)
5640                 card->discipline->complete(gdev);
5641 }
5642 
5643 static int qeth_core_freeze(struct ccwgroup_device *gdev)
5644 {
5645         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5646         if (card->discipline && card->discipline->freeze)
5647                 return card->discipline->freeze(gdev);
5648         return 0;
5649 }
5650 
5651 static int qeth_core_thaw(struct ccwgroup_device *gdev)
5652 {
5653         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5654         if (card->discipline && card->discipline->thaw)
5655                 return card->discipline->thaw(gdev);
5656         return 0;
5657 }
5658 
5659 static int qeth_core_restore(struct ccwgroup_device *gdev)
5660 {
5661         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5662         if (card->discipline && card->discipline->restore)
5663                 return card->discipline->restore(gdev);
5664         return 0;
5665 }
5666 
5667 static struct ccwgroup_driver qeth_core_ccwgroup_driver = {
5668         .driver = {
5669                 .owner = THIS_MODULE,
5670                 .name = "qeth",
5671         },
5672         .setup = qeth_core_probe_device,
5673         .remove = qeth_core_remove_device,
5674         .set_online = qeth_core_set_online,
5675         .set_offline = qeth_core_set_offline,
5676         .shutdown = qeth_core_shutdown,
5677         .prepare = qeth_core_prepare,
5678         .complete = qeth_core_complete,
5679         .freeze = qeth_core_freeze,
5680         .thaw = qeth_core_thaw,
5681         .restore = qeth_core_restore,
5682 };
5683 
5684 static ssize_t qeth_core_driver_group_store(struct device_driver *ddrv,
5685                                             const char *buf, size_t count)
5686 {
5687         int err;
5688 
5689         err = ccwgroup_create_dev(qeth_core_root_dev,
5690                                   &qeth_core_ccwgroup_driver, 3, buf);
5691 
5692         return err ? err : count;
5693 }
5694 static DRIVER_ATTR(group, 0200, NULL, qeth_core_driver_group_store);
5695 
5696 static struct attribute *qeth_drv_attrs[] = {
5697         &driver_attr_group.attr,
5698         NULL,
5699 };
5700 static struct attribute_group qeth_drv_attr_group = {
5701         .attrs = qeth_drv_attrs,
5702 };
5703 static const struct attribute_group *qeth_drv_attr_groups[] = {
5704         &qeth_drv_attr_group,
5705         NULL,
5706 };
5707 
5708 static struct {
5709         const char str[ETH_GSTRING_LEN];
5710 } qeth_ethtool_stats_keys[] = {
5711 /*  0 */{"rx skbs"},
5712         {"rx buffers"},
5713         {"tx skbs"},
5714         {"tx buffers"},
5715         {"tx skbs no packing"},
5716         {"tx buffers no packing"},
5717         {"tx skbs packing"},
5718         {"tx buffers packing"},
5719         {"tx sg skbs"},
5720         {"tx sg frags"},
5721 /* 10 */{"rx sg skbs"},
5722         {"rx sg frags"},
5723         {"rx sg page allocs"},
5724         {"tx large kbytes"},
5725         {"tx large count"},
5726         {"tx pk state ch n->p"},
5727         {"tx pk state ch p->n"},
5728         {"tx pk watermark low"},
5729         {"tx pk watermark high"},
5730         {"queue 0 buffer usage"},
5731 /* 20 */{"queue 1 buffer usage"},
5732         {"queue 2 buffer usage"},
5733         {"queue 3 buffer usage"},
5734         {"rx poll time"},
5735         {"rx poll count"},
5736         {"rx do_QDIO time"},
5737         {"rx do_QDIO count"},
5738         {"tx handler time"},
5739         {"tx handler count"},
5740         {"tx time"},
5741 /* 30 */{"tx count"},
5742         {"tx do_QDIO time"},
5743         {"tx do_QDIO count"},
5744         {"tx csum"},
5745         {"tx lin"},
5746         {"cq handler count"},
5747         {"cq handler time"}
5748 };
5749 
5750 int qeth_core_get_sset_count(struct net_device *dev, int stringset)
5751 {
5752         switch (stringset) {
5753         case ETH_SS_STATS:
5754                 return (sizeof(qeth_ethtool_stats_keys) / ETH_GSTRING_LEN);
5755         default:
5756                 return -EINVAL;
5757         }
5758 }
5759 EXPORT_SYMBOL_GPL(qeth_core_get_sset_count);
5760 
5761 void qeth_core_get_ethtool_stats(struct net_device *dev,
5762                 struct ethtool_stats *stats, u64 *data)
5763 {
5764         struct qeth_card *card = dev->ml_priv;
5765         data[0] = card->stats.rx_packets -
5766                                 card->perf_stats.initial_rx_packets;
5767         data[1] = card->perf_stats.bufs_rec;
5768         data[2] = card->stats.tx_packets -
5769                                 card->perf_stats.initial_tx_packets;
5770         data[3] = card->perf_stats.bufs_sent;
5771         data[4] = card->stats.tx_packets - card->perf_stats.initial_tx_packets
5772                         - card->perf_stats.skbs_sent_pack;
5773         data[5] = card->perf_stats.bufs_sent - card->perf_stats.bufs_sent_pack;
5774         data[6] = card->perf_stats.skbs_sent_pack;
5775         data[7] = card->perf_stats.bufs_sent_pack;
5776         data[8] = card->perf_stats.sg_skbs_sent;
5777         data[9] = card->perf_stats.sg_frags_sent;
5778         data[10] = card->perf_stats.sg_skbs_rx;
5779         data[11] = card->perf_stats.sg_frags_rx;
5780         data[12] = card->perf_stats.sg_alloc_page_rx;
5781         data[13] = (card->perf_stats.large_send_bytes >> 10);
5782         data[14] = card->perf_stats.large_send_cnt;
5783         data[15] = card->perf_stats.sc_dp_p;
5784         data[16] = card->perf_stats.sc_p_dp;
5785         data[17] = QETH_LOW_WATERMARK_PACK;
5786         data[18] = QETH_HIGH_WATERMARK_PACK;
5787         data[19] = atomic_read(&card->qdio.out_qs[0]->used_buffers);
5788         data[20] = (card->qdio.no_out_queues > 1) ?
5789                         atomic_read(&card->qdio.out_qs[1]->used_buffers) : 0;
5790         data[21] = (card->qdio.no_out_queues > 2) ?
5791                         atomic_read(&card->qdio.out_qs[2]->used_buffers) : 0;
5792         data[22] = (card->qdio.no_out_queues > 3) ?
5793                         atomic_read(&card->qdio.out_qs[3]->used_buffers) : 0;
5794         data[23] = card->perf_stats.inbound_time;
5795         data[24] = card->perf_stats.inbound_cnt;
5796         data[25] = card->perf_stats.inbound_do_qdio_time;
5797         data[26] = card->perf_stats.inbound_do_qdio_cnt;
5798         data[27] = card->perf_stats.outbound_handler_time;
5799         data[28] = card->perf_stats.outbound_handler_cnt;
5800         data[29] = card->perf_stats.outbound_time;
5801         data[30] = card->perf_stats.outbound_cnt;
5802         data[31] = card->perf_stats.outbound_do_qdio_time;
5803         data[32] = card->perf_stats.outbound_do_qdio_cnt;
5804         data[33] = card->perf_stats.tx_csum;
5805         data[34] = card->perf_stats.tx_lin;
5806         data[35] = card->perf_stats.cq_cnt;
5807         data[36] = card->perf_stats.cq_time;
5808 }
5809 EXPORT_SYMBOL_GPL(qeth_core_get_ethtool_stats);
5810 
5811 void qeth_core_get_strings(struct net_device *dev, u32 stringset, u8 *data)
5812 {
5813         switch (stringset) {
5814         case ETH_SS_STATS:
5815                 memcpy(data, &qeth_ethtool_stats_keys,
5816                         sizeof(qeth_ethtool_stats_keys));
5817                 break;
5818         default:
5819                 WARN_ON(1);
5820                 break;
5821         }
5822 }
5823 EXPORT_SYMBOL_GPL(qeth_core_get_strings);
5824 
5825 void qeth_core_get_drvinfo(struct net_device *dev,
5826                 struct ethtool_drvinfo *info)
5827 {
5828         struct qeth_card *card = dev->ml_priv;
5829 
5830         strlcpy(info->driver, card->options.layer2 ? "qeth_l2" : "qeth_l3",
5831                 sizeof(info->driver));
5832         strlcpy(info->version, "1.0", sizeof(info->version));
5833         strlcpy(info->fw_version, card->info.mcl_level,
5834                 sizeof(info->fw_version));
5835         snprintf(info->bus_info, sizeof(info->bus_info), "%s/%s/%s",
5836                  CARD_RDEV_ID(card), CARD_WDEV_ID(card), CARD_DDEV_ID(card));
5837 }
5838 EXPORT_SYMBOL_GPL(qeth_core_get_drvinfo);
5839 
5840 /* Helper function to fill 'advertizing' and 'supported' which are the same. */
5841 /* Autoneg and full-duplex are supported and advertized uncondionally.       */
5842 /* Always advertize and support all speeds up to specified, and only one     */
5843 /* specified port type.                                                      */
5844 static void qeth_set_ecmd_adv_sup(struct ethtool_cmd *ecmd,
5845                                 int maxspeed, int porttype)
5846 {
5847         int port_sup, port_adv, spd_sup, spd_adv;
5848 
5849         switch (porttype) {
5850         case PORT_TP:
5851                 port_sup = SUPPORTED_TP;
5852                 port_adv = ADVERTISED_TP;
5853                 break;
5854         case PORT_FIBRE:
5855                 port_sup = SUPPORTED_FIBRE;
5856                 port_adv = ADVERTISED_FIBRE;
5857                 break;
5858         default:
5859                 port_sup = SUPPORTED_TP;
5860                 port_adv = ADVERTISED_TP;
5861                 WARN_ON_ONCE(1);
5862         }
5863 
5864         /* "Fallthrough" case'es ordered from high to low result in setting  */
5865         /* flags cumulatively, starting from the specified speed and down to */
5866         /* the lowest possible.                                              */
5867         spd_sup = 0;
5868         spd_adv = 0;
5869         switch (maxspeed) {
5870         case SPEED_10000:
5871                 spd_sup |= SUPPORTED_10000baseT_Full;
5872                 spd_adv |= ADVERTISED_10000baseT_Full;
5873         case SPEED_1000:
5874                 spd_sup |= SUPPORTED_1000baseT_Half | SUPPORTED_1000baseT_Full;
5875                 spd_adv |= ADVERTISED_1000baseT_Half |
5876                                                 ADVERTISED_1000baseT_Full;
5877         case SPEED_100:
5878                 spd_sup |= SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full;
5879                 spd_adv |= ADVERTISED_100baseT_Half | ADVERTISED_100baseT_Full;
5880         case SPEED_10:
5881                 spd_sup |= SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full;
5882                 spd_adv |= ADVERTISED_10baseT_Half | ADVERTISED_10baseT_Full;
5883         break;
5884         default:
5885                 spd_sup = SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full;
5886                 spd_adv = ADVERTISED_10baseT_Half | ADVERTISED_10baseT_Full;
5887                 WARN_ON_ONCE(1);
5888         }
5889         ecmd->advertising = ADVERTISED_Autoneg | port_adv | spd_adv;
5890         ecmd->supported = SUPPORTED_Autoneg | port_sup | spd_sup;
5891 }
5892 
5893 int qeth_core_ethtool_get_settings(struct net_device *netdev,
5894                                         struct ethtool_cmd *ecmd)
5895 {
5896         struct qeth_card *card = netdev->ml_priv;
5897         enum qeth_link_types link_type;
5898         struct carrier_info carrier_info;
5899         int rc;
5900         u32 speed;
5901 
5902         if ((card->info.type == QETH_CARD_TYPE_IQD) || (card->info.guestlan))
5903                 link_type = QETH_LINK_TYPE_10GBIT_ETH;
5904         else
5905                 link_type = card->info.link_type;
5906 
5907         ecmd->transceiver = XCVR_INTERNAL;
5908         ecmd->duplex = DUPLEX_FULL;
5909         ecmd->autoneg = AUTONEG_ENABLE;
5910 
5911         switch (link_type) {
5912         case QETH_LINK_TYPE_FAST_ETH:
5913         case QETH_LINK_TYPE_LANE_ETH100:
5914                 qeth_set_ecmd_adv_sup(ecmd, SPEED_100, PORT_TP);
5915                 speed = SPEED_100;
5916                 ecmd->port = PORT_TP;
5917                 break;
5918 
5919         case QETH_LINK_TYPE_GBIT_ETH:
5920         case QETH_LINK_TYPE_LANE_ETH1000:
5921                 qeth_set_ecmd_adv_sup(ecmd, SPEED_1000, PORT_FIBRE);
5922                 speed = SPEED_1000;
5923                 ecmd->port = PORT_FIBRE;
5924                 break;
5925 
5926         case QETH_LINK_TYPE_10GBIT_ETH:
5927                 qeth_set_ecmd_adv_sup(ecmd, SPEED_10000, PORT_FIBRE);
5928                 speed = SPEED_10000;
5929                 ecmd->port = PORT_FIBRE;
5930                 break;
5931 
5932         default:
5933                 qeth_set_ecmd_adv_sup(ecmd, SPEED_10, PORT_TP);
5934                 speed = SPEED_10;
5935                 ecmd->port = PORT_TP;
5936         }
5937         ethtool_cmd_speed_set(ecmd, speed);
5938 
5939         /* Check if we can obtain more accurate information.     */
5940         /* If QUERY_CARD_INFO command is not supported or fails, */
5941         /* just return the heuristics that was filled above.     */
5942         if (!qeth_card_hw_is_reachable(card))
5943                 return -ENODEV;
5944         rc = qeth_query_card_info(card, &carrier_info);
5945         if (rc == -EOPNOTSUPP) /* for old hardware, return heuristic */
5946                 return 0;
5947         if (rc) /* report error from the hardware operation */
5948                 return rc;
5949         /* on success, fill in the information got from the hardware */
5950 
5951         netdev_dbg(netdev,
5952         "card info: card_type=0x%02x, port_mode=0x%04x, port_speed=0x%08x\n",
5953                         carrier_info.card_type,
5954                         carrier_info.port_mode,
5955                         carrier_info.port_speed);
5956 
5957         /* Update attributes for which we've obtained more authoritative */
5958         /* information, leave the rest the way they where filled above.  */
5959         switch (carrier_info.card_type) {
5960         case CARD_INFO_TYPE_1G_COPPER_A:
5961         case CARD_INFO_TYPE_1G_COPPER_B:
5962                 qeth_set_ecmd_adv_sup(ecmd, SPEED_1000, PORT_TP);
5963                 ecmd->port = PORT_TP;
5964                 break;
5965         case CARD_INFO_TYPE_1G_FIBRE_A:
5966         case CARD_INFO_TYPE_1G_FIBRE_B:
5967                 qeth_set_ecmd_adv_sup(ecmd, SPEED_1000, PORT_FIBRE);
5968                 ecmd->port = PORT_FIBRE;
5969                 break;
5970         case CARD_INFO_TYPE_10G_FIBRE_A:
5971         case CARD_INFO_TYPE_10G_FIBRE_B:
5972                 qeth_set_ecmd_adv_sup(ecmd, SPEED_10000, PORT_FIBRE);
5973                 ecmd->port = PORT_FIBRE;
5974                 break;
5975         }
5976 
5977         switch (carrier_info.port_mode) {
5978         case CARD_INFO_PORTM_FULLDUPLEX:
5979                 ecmd->duplex = DUPLEX_FULL;
5980                 break;
5981         case CARD_INFO_PORTM_HALFDUPLEX:
5982                 ecmd->duplex = DUPLEX_HALF;
5983                 break;
5984         }
5985 
5986         switch (carrier_info.port_speed) {
5987         case CARD_INFO_PORTS_10M:
5988                 speed = SPEED_10;
5989                 break;
5990         case CARD_INFO_PORTS_100M:
5991                 speed = SPEED_100;
5992                 break;
5993         case CARD_INFO_PORTS_1G:
5994                 speed = SPEED_1000;
5995                 break;
5996         case CARD_INFO_PORTS_10G:
5997                 speed = SPEED_10000;
5998                 break;
5999         }
6000         ethtool_cmd_speed_set(ecmd, speed);
6001 
6002         return 0;
6003 }
6004 EXPORT_SYMBOL_GPL(qeth_core_ethtool_get_settings);
6005 
6006 static int __init qeth_core_init(void)
6007 {
6008         int rc;
6009 
6010         pr_info("loading core functions\n");
6011         INIT_LIST_HEAD(&qeth_core_card_list.list);
6012         INIT_LIST_HEAD(&qeth_dbf_list);
6013         rwlock_init(&qeth_core_card_list.rwlock);
6014         mutex_init(&qeth_mod_mutex);
6015 
6016         qeth_wq = create_singlethread_workqueue("qeth_wq");
6017 
6018         rc = qeth_register_dbf_views();
6019         if (rc)
6020                 goto out_err;
6021         qeth_core_root_dev = root_device_register("qeth");
6022         rc = PTR_ERR_OR_ZERO(qeth_core_root_dev);
6023         if (rc)
6024                 goto register_err;
6025         qeth_core_header_cache = kmem_cache_create("qeth_hdr",
6026                         sizeof(struct qeth_hdr) + ETH_HLEN, 64, 0, NULL);
6027         if (!qeth_core_header_cache) {
6028                 rc = -ENOMEM;
6029                 goto slab_err;
6030         }
6031         qeth_qdio_outbuf_cache = kmem_cache_create("qeth_buf",
6032                         sizeof(struct qeth_qdio_out_buffer), 0, 0, NULL);
6033         if (!qeth_qdio_outbuf_cache) {
6034                 rc = -ENOMEM;
6035                 goto cqslab_err;
6036         }
6037         rc = ccw_driver_register(&qeth_ccw_driver);
6038         if (rc)
6039                 goto ccw_err;
6040         qeth_core_ccwgroup_driver.driver.groups = qeth_drv_attr_groups;
6041         rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver);
6042         if (rc)
6043                 goto ccwgroup_err;
6044 
6045         return 0;
6046 
6047 ccwgroup_err:
6048         ccw_driver_unregister(&qeth_ccw_driver);
6049 ccw_err:
6050         kmem_cache_destroy(qeth_qdio_outbuf_cache);
6051 cqslab_err:
6052         kmem_cache_destroy(qeth_core_header_cache);
6053 slab_err:
6054         root_device_unregister(qeth_core_root_dev);
6055 register_err:
6056         qeth_unregister_dbf_views();
6057 out_err:
6058         pr_err("Initializing the qeth device driver failed\n");
6059         return rc;
6060 }
6061 
6062 static void __exit qeth_core_exit(void)
6063 {
6064         qeth_clear_dbf_list();
6065         destroy_workqueue(qeth_wq);
6066         ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver);
6067         ccw_driver_unregister(&qeth_ccw_driver);
6068         kmem_cache_destroy(qeth_qdio_outbuf_cache);
6069         kmem_cache_destroy(qeth_core_header_cache);
6070         root_device_unregister(qeth_core_root_dev);
6071         qeth_unregister_dbf_views();
6072         pr_info("core functions removed\n");
6073 }
6074 
6075 module_init(qeth_core_init);
6076 module_exit(qeth_core_exit);
6077 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
6078 MODULE_DESCRIPTION("qeth core functions");
6079 MODULE_LICENSE("GPL");
6080 

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