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Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik...
[deliverable/linux.git] / drivers / message / fusion / mptlan.c
1 /*
2 * linux/drivers/message/fusion/mptlan.c
3 * IP Over Fibre Channel device driver.
4 * For use with LSI Logic Fibre Channel PCI chip/adapters
5 * running LSI Logic Fusion MPT (Message Passing Technology) firmware.
6 *
7 * Copyright (c) 2000-2005 LSI Logic Corporation
8 *
9 */
10 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
11 /*
12 This program is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General Public License as published by
14 the Free Software Foundation; version 2 of the License.
15
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
20
21 NO WARRANTY
22 THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
23 CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
24 LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
25 MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
26 solely responsible for determining the appropriateness of using and
27 distributing the Program and assumes all risks associated with its
28 exercise of rights under this Agreement, including but not limited to
29 the risks and costs of program errors, damage to or loss of data,
30 programs or equipment, and unavailability or interruption of operations.
31
32 DISCLAIMER OF LIABILITY
33 NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
34 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
35 DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND
36 ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
37 TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
38 USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
39 HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES
40
41 You should have received a copy of the GNU General Public License
42 along with this program; if not, write to the Free Software
43 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
44 */
45
46 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
47 /*
48 * Define statements used for debugging
49 */
50 //#define MPT_LAN_IO_DEBUG
51
52 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
53
54 #include "mptlan.h"
55 #include <linux/init.h>
56 #include <linux/module.h>
57 #include <linux/fs.h>
58
59 #define MYNAM "mptlan"
60
61 MODULE_LICENSE("GPL");
62
63 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
64 /*
65 * MPT LAN message sizes without variable part.
66 */
67 #define MPT_LAN_RECEIVE_POST_REQUEST_SIZE \
68 (sizeof(LANReceivePostRequest_t) - sizeof(SGE_MPI_UNION))
69
70 #define MPT_LAN_TRANSACTION32_SIZE \
71 (sizeof(SGETransaction32_t) - sizeof(u32))
72
73 /*
74 * Fusion MPT LAN private structures
75 */
76
77 struct NAA_Hosed {
78 u16 NAA;
79 u8 ieee[FC_ALEN];
80 struct NAA_Hosed *next;
81 };
82
83 struct BufferControl {
84 struct sk_buff *skb;
85 dma_addr_t dma;
86 unsigned int len;
87 };
88
89 struct mpt_lan_priv {
90 MPT_ADAPTER *mpt_dev;
91 u8 pnum; /* Port number in the IOC. This is not a Unix network port! */
92
93 atomic_t buckets_out; /* number of unused buckets on IOC */
94 int bucketthresh; /* Send more when this many left */
95
96 int *mpt_txfidx; /* Free Tx Context list */
97 int mpt_txfidx_tail;
98 spinlock_t txfidx_lock;
99
100 int *mpt_rxfidx; /* Free Rx Context list */
101 int mpt_rxfidx_tail;
102 spinlock_t rxfidx_lock;
103
104 struct BufferControl *RcvCtl; /* Receive BufferControl structs */
105 struct BufferControl *SendCtl; /* Send BufferControl structs */
106
107 int max_buckets_out; /* Max buckets to send to IOC */
108 int tx_max_out; /* IOC's Tx queue len */
109
110 u32 total_posted;
111 u32 total_received;
112 struct net_device_stats stats; /* Per device statistics */
113
114 struct work_struct post_buckets_task;
115 unsigned long post_buckets_active;
116 };
117
118 struct mpt_lan_ohdr {
119 u16 dtype;
120 u8 daddr[FC_ALEN];
121 u16 stype;
122 u8 saddr[FC_ALEN];
123 };
124
125 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
126
127 /*
128 * Forward protos...
129 */
130 static int lan_reply (MPT_ADAPTER *ioc, MPT_FRAME_HDR *mf,
131 MPT_FRAME_HDR *reply);
132 static int mpt_lan_open(struct net_device *dev);
133 static int mpt_lan_reset(struct net_device *dev);
134 static int mpt_lan_close(struct net_device *dev);
135 static void mpt_lan_post_receive_buckets(void *dev_id);
136 static void mpt_lan_wake_post_buckets_task(struct net_device *dev,
137 int priority);
138 static int mpt_lan_receive_post_turbo(struct net_device *dev, u32 tmsg);
139 static int mpt_lan_receive_post_reply(struct net_device *dev,
140 LANReceivePostReply_t *pRecvRep);
141 static int mpt_lan_send_turbo(struct net_device *dev, u32 tmsg);
142 static int mpt_lan_send_reply(struct net_device *dev,
143 LANSendReply_t *pSendRep);
144 static int mpt_lan_ioc_reset(MPT_ADAPTER *ioc, int reset_phase);
145 static int mpt_lan_event_process(MPT_ADAPTER *ioc, EventNotificationReply_t *pEvReply);
146 static unsigned short mpt_lan_type_trans(struct sk_buff *skb,
147 struct net_device *dev);
148
149 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
150 /*
151 * Fusion MPT LAN private data
152 */
153 static int LanCtx = -1;
154
155 static u32 max_buckets_out = 127;
156 static u32 tx_max_out_p = 127 - 16;
157
158 #ifdef QLOGIC_NAA_WORKAROUND
159 static struct NAA_Hosed *mpt_bad_naa = NULL;
160 DEFINE_RWLOCK(bad_naa_lock);
161 #endif
162
163 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
164 /*
165 * Fusion MPT LAN external data
166 */
167 extern int mpt_lan_index;
168
169 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
170 /**
171 * lan_reply - Handle all data sent from the hardware.
172 * @ioc: Pointer to MPT_ADAPTER structure
173 * @mf: Pointer to original MPT request frame (NULL if TurboReply)
174 * @reply: Pointer to MPT reply frame
175 *
176 * Returns 1 indicating original alloc'd request frame ptr
177 * should be freed, or 0 if it shouldn't.
178 */
179 static int
180 lan_reply (MPT_ADAPTER *ioc, MPT_FRAME_HDR *mf, MPT_FRAME_HDR *reply)
181 {
182 struct net_device *dev = ioc->netdev;
183 int FreeReqFrame = 0;
184
185 dioprintk((KERN_INFO MYNAM ": %s/%s: Got reply.\n",
186 IOC_AND_NETDEV_NAMES_s_s(dev)));
187
188 // dioprintk((KERN_INFO MYNAM "@lan_reply: mf = %p, reply = %p\n",
189 // mf, reply));
190
191 if (mf == NULL) {
192 u32 tmsg = CAST_PTR_TO_U32(reply);
193
194 dioprintk((KERN_INFO MYNAM ": %s/%s: @lan_reply, tmsg %08x\n",
195 IOC_AND_NETDEV_NAMES_s_s(dev),
196 tmsg));
197
198 switch (GET_LAN_FORM(tmsg)) {
199
200 // NOTE! (Optimization) First case here is now caught in
201 // mptbase.c::mpt_interrupt() routine and callcack here
202 // is now skipped for this case!
203 #if 0
204 case LAN_REPLY_FORM_MESSAGE_CONTEXT:
205 // dioprintk((KERN_INFO MYNAM "/lan_reply: "
206 // "MessageContext turbo reply received\n"));
207 FreeReqFrame = 1;
208 break;
209 #endif
210
211 case LAN_REPLY_FORM_SEND_SINGLE:
212 // dioprintk((MYNAM "/lan_reply: "
213 // "calling mpt_lan_send_reply (turbo)\n"));
214
215 // Potential BUG here?
216 // FreeReqFrame = mpt_lan_send_turbo(dev, tmsg);
217 // If/when mpt_lan_send_turbo would return 1 here,
218 // calling routine (mptbase.c|mpt_interrupt)
219 // would Oops because mf has already been set
220 // to NULL. So after return from this func,
221 // mpt_interrupt() will attempt to put (NULL) mf ptr
222 // item back onto its adapter FreeQ - Oops!:-(
223 // It's Ok, since mpt_lan_send_turbo() *currently*
224 // always returns 0, but..., just in case:
225
226 (void) mpt_lan_send_turbo(dev, tmsg);
227 FreeReqFrame = 0;
228
229 break;
230
231 case LAN_REPLY_FORM_RECEIVE_SINGLE:
232 // dioprintk((KERN_INFO MYNAM "@lan_reply: "
233 // "rcv-Turbo = %08x\n", tmsg));
234 mpt_lan_receive_post_turbo(dev, tmsg);
235 break;
236
237 default:
238 printk (KERN_ERR MYNAM "/lan_reply: Got a turbo reply "
239 "that I don't know what to do with\n");
240
241 /* CHECKME! Hmmm... FreeReqFrame is 0 here; is that right? */
242
243 break;
244 }
245
246 return FreeReqFrame;
247 }
248
249 // msg = (u32 *) reply;
250 // dioprintk((KERN_INFO MYNAM "@lan_reply: msg = %08x %08x %08x %08x\n",
251 // le32_to_cpu(msg[0]), le32_to_cpu(msg[1]),
252 // le32_to_cpu(msg[2]), le32_to_cpu(msg[3])));
253 // dioprintk((KERN_INFO MYNAM "@lan_reply: Function = %02xh\n",
254 // reply->u.hdr.Function));
255
256 switch (reply->u.hdr.Function) {
257
258 case MPI_FUNCTION_LAN_SEND:
259 {
260 LANSendReply_t *pSendRep;
261
262 pSendRep = (LANSendReply_t *) reply;
263 FreeReqFrame = mpt_lan_send_reply(dev, pSendRep);
264 break;
265 }
266
267 case MPI_FUNCTION_LAN_RECEIVE:
268 {
269 LANReceivePostReply_t *pRecvRep;
270
271 pRecvRep = (LANReceivePostReply_t *) reply;
272 if (pRecvRep->NumberOfContexts) {
273 mpt_lan_receive_post_reply(dev, pRecvRep);
274 if (!(pRecvRep->MsgFlags & MPI_MSGFLAGS_CONTINUATION_REPLY))
275 FreeReqFrame = 1;
276 } else
277 dioprintk((KERN_INFO MYNAM "@lan_reply: zero context "
278 "ReceivePostReply received.\n"));
279 break;
280 }
281
282 case MPI_FUNCTION_LAN_RESET:
283 /* Just a default reply. Might want to check it to
284 * make sure that everything went ok.
285 */
286 FreeReqFrame = 1;
287 break;
288
289 case MPI_FUNCTION_EVENT_NOTIFICATION:
290 case MPI_FUNCTION_EVENT_ACK:
291 /* _EVENT_NOTIFICATION should NOT come down this path any more.
292 * Should be routed to mpt_lan_event_process(), but just in case...
293 */
294 FreeReqFrame = 1;
295 break;
296
297 default:
298 printk (KERN_ERR MYNAM "/lan_reply: Got a non-turbo "
299 "reply that I don't know what to do with\n");
300
301 /* CHECKME! Hmmm... FreeReqFrame is 0 here; is that right? */
302 FreeReqFrame = 1;
303
304 break;
305 }
306
307 return FreeReqFrame;
308 }
309
310 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
311 static int
312 mpt_lan_ioc_reset(MPT_ADAPTER *ioc, int reset_phase)
313 {
314 struct net_device *dev = ioc->netdev;
315 struct mpt_lan_priv *priv;
316
317 if (dev == NULL)
318 return(1);
319 else
320 priv = netdev_priv(dev);
321
322 dlprintk((KERN_INFO MYNAM ": IOC %s_reset routed to LAN driver!\n",
323 reset_phase==MPT_IOC_SETUP_RESET ? "setup" : (
324 reset_phase==MPT_IOC_PRE_RESET ? "pre" : "post")));
325
326 if (priv->mpt_rxfidx == NULL)
327 return (1);
328
329 if (reset_phase == MPT_IOC_SETUP_RESET) {
330 ;
331 } else if (reset_phase == MPT_IOC_PRE_RESET) {
332 int i;
333 unsigned long flags;
334
335 netif_stop_queue(dev);
336
337 dlprintk ((KERN_INFO "mptlan/ioc_reset: called netif_stop_queue for %s.\n", dev->name));
338
339 atomic_set(&priv->buckets_out, 0);
340
341 /* Reset Rx Free Tail index and re-populate the queue. */
342 spin_lock_irqsave(&priv->rxfidx_lock, flags);
343 priv->mpt_rxfidx_tail = -1;
344 for (i = 0; i < priv->max_buckets_out; i++)
345 priv->mpt_rxfidx[++priv->mpt_rxfidx_tail] = i;
346 spin_unlock_irqrestore(&priv->rxfidx_lock, flags);
347 } else {
348 mpt_lan_post_receive_buckets(dev);
349 netif_wake_queue(dev);
350 }
351
352 return 1;
353 }
354
355 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
356 static int
357 mpt_lan_event_process(MPT_ADAPTER *ioc, EventNotificationReply_t *pEvReply)
358 {
359 dlprintk((KERN_INFO MYNAM ": MPT event routed to LAN driver!\n"));
360
361 switch (le32_to_cpu(pEvReply->Event)) {
362 case MPI_EVENT_NONE: /* 00 */
363 case MPI_EVENT_LOG_DATA: /* 01 */
364 case MPI_EVENT_STATE_CHANGE: /* 02 */
365 case MPI_EVENT_UNIT_ATTENTION: /* 03 */
366 case MPI_EVENT_IOC_BUS_RESET: /* 04 */
367 case MPI_EVENT_EXT_BUS_RESET: /* 05 */
368 case MPI_EVENT_RESCAN: /* 06 */
369 /* Ok, do we need to do anything here? As far as
370 I can tell, this is when a new device gets added
371 to the loop. */
372 case MPI_EVENT_LINK_STATUS_CHANGE: /* 07 */
373 case MPI_EVENT_LOOP_STATE_CHANGE: /* 08 */
374 case MPI_EVENT_LOGOUT: /* 09 */
375 case MPI_EVENT_EVENT_CHANGE: /* 0A */
376 default:
377 break;
378 }
379
380 /*
381 * NOTE: pEvent->AckRequired handling now done in mptbase.c;
382 * Do NOT do it here now!
383 */
384
385 return 1;
386 }
387
388 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
389 static int
390 mpt_lan_open(struct net_device *dev)
391 {
392 struct mpt_lan_priv *priv = netdev_priv(dev);
393 int i;
394
395 if (mpt_lan_reset(dev) != 0) {
396 MPT_ADAPTER *mpt_dev = priv->mpt_dev;
397
398 printk (KERN_WARNING MYNAM "/lan_open: lan_reset failed.");
399
400 if (mpt_dev->active)
401 printk ("The ioc is active. Perhaps it needs to be"
402 " reset?\n");
403 else
404 printk ("The ioc in inactive, most likely in the "
405 "process of being reset. Please try again in "
406 "a moment.\n");
407 }
408
409 priv->mpt_txfidx = kmalloc(priv->tx_max_out * sizeof(int), GFP_KERNEL);
410 if (priv->mpt_txfidx == NULL)
411 goto out;
412 priv->mpt_txfidx_tail = -1;
413
414 priv->SendCtl = kcalloc(priv->tx_max_out, sizeof(struct BufferControl),
415 GFP_KERNEL);
416 if (priv->SendCtl == NULL)
417 goto out_mpt_txfidx;
418 for (i = 0; i < priv->tx_max_out; i++)
419 priv->mpt_txfidx[++priv->mpt_txfidx_tail] = i;
420
421 dlprintk((KERN_INFO MYNAM "@lo: Finished initializing SendCtl\n"));
422
423 priv->mpt_rxfidx = kmalloc(priv->max_buckets_out * sizeof(int),
424 GFP_KERNEL);
425 if (priv->mpt_rxfidx == NULL)
426 goto out_SendCtl;
427 priv->mpt_rxfidx_tail = -1;
428
429 priv->RcvCtl = kcalloc(priv->max_buckets_out,
430 sizeof(struct BufferControl),
431 GFP_KERNEL);
432 if (priv->RcvCtl == NULL)
433 goto out_mpt_rxfidx;
434 for (i = 0; i < priv->max_buckets_out; i++)
435 priv->mpt_rxfidx[++priv->mpt_rxfidx_tail] = i;
436
437 /**/ dlprintk((KERN_INFO MYNAM "/lo: txfidx contains - "));
438 /**/ for (i = 0; i < priv->tx_max_out; i++)
439 /**/ dlprintk((" %xh", priv->mpt_txfidx[i]));
440 /**/ dlprintk(("\n"));
441
442 dlprintk((KERN_INFO MYNAM "/lo: Finished initializing RcvCtl\n"));
443
444 mpt_lan_post_receive_buckets(dev);
445 printk(KERN_INFO MYNAM ": %s/%s: interface up & active\n",
446 IOC_AND_NETDEV_NAMES_s_s(dev));
447
448 if (mpt_event_register(LanCtx, mpt_lan_event_process) != 0) {
449 printk (KERN_WARNING MYNAM "/lo: Unable to register for Event"
450 " Notifications. This is a bad thing! We're not going "
451 "to go ahead, but I'd be leery of system stability at "
452 "this point.\n");
453 }
454
455 netif_start_queue(dev);
456 dlprintk((KERN_INFO MYNAM "/lo: Done.\n"));
457
458 return 0;
459 out_mpt_rxfidx:
460 kfree(priv->mpt_rxfidx);
461 priv->mpt_rxfidx = NULL;
462 out_SendCtl:
463 kfree(priv->SendCtl);
464 priv->SendCtl = NULL;
465 out_mpt_txfidx:
466 kfree(priv->mpt_txfidx);
467 priv->mpt_txfidx = NULL;
468 out: return -ENOMEM;
469 }
470
471 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
472 /* Send a LanReset message to the FW. This should result in the FW returning
473 any buckets it still has. */
474 static int
475 mpt_lan_reset(struct net_device *dev)
476 {
477 MPT_FRAME_HDR *mf;
478 LANResetRequest_t *pResetReq;
479 struct mpt_lan_priv *priv = netdev_priv(dev);
480
481 mf = mpt_get_msg_frame(LanCtx, priv->mpt_dev);
482
483 if (mf == NULL) {
484 /* dlprintk((KERN_ERR MYNAM "/reset: Evil funkiness abounds! "
485 "Unable to allocate a request frame.\n"));
486 */
487 return -1;
488 }
489
490 pResetReq = (LANResetRequest_t *) mf;
491
492 pResetReq->Function = MPI_FUNCTION_LAN_RESET;
493 pResetReq->ChainOffset = 0;
494 pResetReq->Reserved = 0;
495 pResetReq->PortNumber = priv->pnum;
496 pResetReq->MsgFlags = 0;
497 pResetReq->Reserved2 = 0;
498
499 mpt_put_msg_frame(LanCtx, priv->mpt_dev, mf);
500
501 return 0;
502 }
503
504 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
505 static int
506 mpt_lan_close(struct net_device *dev)
507 {
508 struct mpt_lan_priv *priv = netdev_priv(dev);
509 MPT_ADAPTER *mpt_dev = priv->mpt_dev;
510 unsigned long timeout;
511 int i;
512
513 dlprintk((KERN_INFO MYNAM ": mpt_lan_close called\n"));
514
515 mpt_event_deregister(LanCtx);
516
517 dlprintk((KERN_INFO MYNAM ":lan_close: Posted %d buckets "
518 "since driver was loaded, %d still out\n",
519 priv->total_posted,atomic_read(&priv->buckets_out)));
520
521 netif_stop_queue(dev);
522
523 mpt_lan_reset(dev);
524
525 timeout = jiffies + 2 * HZ;
526 while (atomic_read(&priv->buckets_out) && time_before(jiffies, timeout))
527 schedule_timeout_interruptible(1);
528
529 for (i = 0; i < priv->max_buckets_out; i++) {
530 if (priv->RcvCtl[i].skb != NULL) {
531 /**/ dlprintk((KERN_INFO MYNAM "/lan_close: bucket %05x "
532 /**/ "is still out\n", i));
533 pci_unmap_single(mpt_dev->pcidev, priv->RcvCtl[i].dma,
534 priv->RcvCtl[i].len,
535 PCI_DMA_FROMDEVICE);
536 dev_kfree_skb(priv->RcvCtl[i].skb);
537 }
538 }
539
540 kfree(priv->RcvCtl);
541 kfree(priv->mpt_rxfidx);
542
543 for (i = 0; i < priv->tx_max_out; i++) {
544 if (priv->SendCtl[i].skb != NULL) {
545 pci_unmap_single(mpt_dev->pcidev, priv->SendCtl[i].dma,
546 priv->SendCtl[i].len,
547 PCI_DMA_TODEVICE);
548 dev_kfree_skb(priv->SendCtl[i].skb);
549 }
550 }
551
552 kfree(priv->SendCtl);
553 kfree(priv->mpt_txfidx);
554
555 atomic_set(&priv->buckets_out, 0);
556
557 printk(KERN_INFO MYNAM ": %s/%s: interface down & inactive\n",
558 IOC_AND_NETDEV_NAMES_s_s(dev));
559
560 return 0;
561 }
562
563 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
564 static struct net_device_stats *
565 mpt_lan_get_stats(struct net_device *dev)
566 {
567 struct mpt_lan_priv *priv = netdev_priv(dev);
568
569 return (struct net_device_stats *) &priv->stats;
570 }
571
572 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
573 static int
574 mpt_lan_change_mtu(struct net_device *dev, int new_mtu)
575 {
576 if ((new_mtu < MPT_LAN_MIN_MTU) || (new_mtu > MPT_LAN_MAX_MTU))
577 return -EINVAL;
578 dev->mtu = new_mtu;
579 return 0;
580 }
581
582 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
583 /* Tx timeout handler. */
584 static void
585 mpt_lan_tx_timeout(struct net_device *dev)
586 {
587 struct mpt_lan_priv *priv = netdev_priv(dev);
588 MPT_ADAPTER *mpt_dev = priv->mpt_dev;
589
590 if (mpt_dev->active) {
591 dlprintk (("mptlan/tx_timeout: calling netif_wake_queue for %s.\n", dev->name));
592 netif_wake_queue(dev);
593 }
594 }
595
596 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
597 //static inline int
598 static int
599 mpt_lan_send_turbo(struct net_device *dev, u32 tmsg)
600 {
601 struct mpt_lan_priv *priv = netdev_priv(dev);
602 MPT_ADAPTER *mpt_dev = priv->mpt_dev;
603 struct sk_buff *sent;
604 unsigned long flags;
605 u32 ctx;
606
607 ctx = GET_LAN_BUFFER_CONTEXT(tmsg);
608 sent = priv->SendCtl[ctx].skb;
609
610 priv->stats.tx_packets++;
611 priv->stats.tx_bytes += sent->len;
612
613 dioprintk((KERN_INFO MYNAM ": %s/%s: @%s, skb %p sent.\n",
614 IOC_AND_NETDEV_NAMES_s_s(dev),
615 __FUNCTION__, sent));
616
617 priv->SendCtl[ctx].skb = NULL;
618 pci_unmap_single(mpt_dev->pcidev, priv->SendCtl[ctx].dma,
619 priv->SendCtl[ctx].len, PCI_DMA_TODEVICE);
620 dev_kfree_skb_irq(sent);
621
622 spin_lock_irqsave(&priv->txfidx_lock, flags);
623 priv->mpt_txfidx[++priv->mpt_txfidx_tail] = ctx;
624 spin_unlock_irqrestore(&priv->txfidx_lock, flags);
625
626 netif_wake_queue(dev);
627 return 0;
628 }
629
630 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
631 static int
632 mpt_lan_send_reply(struct net_device *dev, LANSendReply_t *pSendRep)
633 {
634 struct mpt_lan_priv *priv = netdev_priv(dev);
635 MPT_ADAPTER *mpt_dev = priv->mpt_dev;
636 struct sk_buff *sent;
637 unsigned long flags;
638 int FreeReqFrame = 0;
639 u32 *pContext;
640 u32 ctx;
641 u8 count;
642
643 count = pSendRep->NumberOfContexts;
644
645 dioprintk((KERN_INFO MYNAM ": send_reply: IOCStatus: %04x\n",
646 le16_to_cpu(pSendRep->IOCStatus)));
647
648 /* Add check for Loginfo Flag in IOCStatus */
649
650 switch (le16_to_cpu(pSendRep->IOCStatus) & MPI_IOCSTATUS_MASK) {
651 case MPI_IOCSTATUS_SUCCESS:
652 priv->stats.tx_packets += count;
653 break;
654
655 case MPI_IOCSTATUS_LAN_CANCELED:
656 case MPI_IOCSTATUS_LAN_TRANSMIT_ABORTED:
657 break;
658
659 case MPI_IOCSTATUS_INVALID_SGL:
660 priv->stats.tx_errors += count;
661 printk (KERN_ERR MYNAM ": %s/%s: ERROR - Invalid SGL sent to IOC!\n",
662 IOC_AND_NETDEV_NAMES_s_s(dev));
663 goto out;
664
665 default:
666 priv->stats.tx_errors += count;
667 break;
668 }
669
670 pContext = &pSendRep->BufferContext;
671
672 spin_lock_irqsave(&priv->txfidx_lock, flags);
673 while (count > 0) {
674 ctx = GET_LAN_BUFFER_CONTEXT(le32_to_cpu(*pContext));
675
676 sent = priv->SendCtl[ctx].skb;
677 priv->stats.tx_bytes += sent->len;
678
679 dioprintk((KERN_INFO MYNAM ": %s/%s: @%s, skb %p sent.\n",
680 IOC_AND_NETDEV_NAMES_s_s(dev),
681 __FUNCTION__, sent));
682
683 priv->SendCtl[ctx].skb = NULL;
684 pci_unmap_single(mpt_dev->pcidev, priv->SendCtl[ctx].dma,
685 priv->SendCtl[ctx].len, PCI_DMA_TODEVICE);
686 dev_kfree_skb_irq(sent);
687
688 priv->mpt_txfidx[++priv->mpt_txfidx_tail] = ctx;
689
690 pContext++;
691 count--;
692 }
693 spin_unlock_irqrestore(&priv->txfidx_lock, flags);
694
695 out:
696 if (!(pSendRep->MsgFlags & MPI_MSGFLAGS_CONTINUATION_REPLY))
697 FreeReqFrame = 1;
698
699 netif_wake_queue(dev);
700 return FreeReqFrame;
701 }
702
703 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
704 static int
705 mpt_lan_sdu_send (struct sk_buff *skb, struct net_device *dev)
706 {
707 struct mpt_lan_priv *priv = netdev_priv(dev);
708 MPT_ADAPTER *mpt_dev = priv->mpt_dev;
709 MPT_FRAME_HDR *mf;
710 LANSendRequest_t *pSendReq;
711 SGETransaction32_t *pTrans;
712 SGESimple64_t *pSimple;
713 dma_addr_t dma;
714 unsigned long flags;
715 int ctx;
716 u16 cur_naa = 0x1000;
717
718 dioprintk((KERN_INFO MYNAM ": %s called, skb_addr = %p\n",
719 __FUNCTION__, skb));
720
721 spin_lock_irqsave(&priv->txfidx_lock, flags);
722 if (priv->mpt_txfidx_tail < 0) {
723 netif_stop_queue(dev);
724 spin_unlock_irqrestore(&priv->txfidx_lock, flags);
725
726 printk (KERN_ERR "%s: no tx context available: %u\n",
727 __FUNCTION__, priv->mpt_txfidx_tail);
728 return 1;
729 }
730
731 mf = mpt_get_msg_frame(LanCtx, mpt_dev);
732 if (mf == NULL) {
733 netif_stop_queue(dev);
734 spin_unlock_irqrestore(&priv->txfidx_lock, flags);
735
736 printk (KERN_ERR "%s: Unable to alloc request frame\n",
737 __FUNCTION__);
738 return 1;
739 }
740
741 ctx = priv->mpt_txfidx[priv->mpt_txfidx_tail--];
742 spin_unlock_irqrestore(&priv->txfidx_lock, flags);
743
744 // dioprintk((KERN_INFO MYNAM ": %s/%s: Creating new msg frame (send).\n",
745 // IOC_AND_NETDEV_NAMES_s_s(dev)));
746
747 pSendReq = (LANSendRequest_t *) mf;
748
749 /* Set the mac.raw pointer, since this apparently isn't getting
750 * done before we get the skb. Pull the data pointer past the mac data.
751 */
752 skb->mac.raw = skb->data;
753 skb_pull(skb, 12);
754
755 dma = pci_map_single(mpt_dev->pcidev, skb->data, skb->len,
756 PCI_DMA_TODEVICE);
757
758 priv->SendCtl[ctx].skb = skb;
759 priv->SendCtl[ctx].dma = dma;
760 priv->SendCtl[ctx].len = skb->len;
761
762 /* Message Header */
763 pSendReq->Reserved = 0;
764 pSendReq->Function = MPI_FUNCTION_LAN_SEND;
765 pSendReq->ChainOffset = 0;
766 pSendReq->Reserved2 = 0;
767 pSendReq->MsgFlags = 0;
768 pSendReq->PortNumber = priv->pnum;
769
770 /* Transaction Context Element */
771 pTrans = (SGETransaction32_t *) pSendReq->SG_List;
772
773 /* No Flags, 8 bytes of Details, 32bit Context (bloody turbo replies) */
774 pTrans->ContextSize = sizeof(u32);
775 pTrans->DetailsLength = 2 * sizeof(u32);
776 pTrans->Flags = 0;
777 pTrans->TransactionContext[0] = cpu_to_le32(ctx);
778
779 // dioprintk((KERN_INFO MYNAM ": %s/%s: BC = %08x, skb = %p, buff = %p\n",
780 // IOC_AND_NETDEV_NAMES_s_s(dev),
781 // ctx, skb, skb->data));
782
783 #ifdef QLOGIC_NAA_WORKAROUND
784 {
785 struct NAA_Hosed *nh;
786
787 /* Munge the NAA for Tx packets to QLogic boards, which don't follow
788 RFC 2625. The longer I look at this, the more my opinion of Qlogic
789 drops. */
790 read_lock_irq(&bad_naa_lock);
791 for (nh = mpt_bad_naa; nh != NULL; nh=nh->next) {
792 if ((nh->ieee[0] == skb->mac.raw[0]) &&
793 (nh->ieee[1] == skb->mac.raw[1]) &&
794 (nh->ieee[2] == skb->mac.raw[2]) &&
795 (nh->ieee[3] == skb->mac.raw[3]) &&
796 (nh->ieee[4] == skb->mac.raw[4]) &&
797 (nh->ieee[5] == skb->mac.raw[5])) {
798 cur_naa = nh->NAA;
799 dlprintk ((KERN_INFO "mptlan/sdu_send: using NAA value "
800 "= %04x.\n", cur_naa));
801 break;
802 }
803 }
804 read_unlock_irq(&bad_naa_lock);
805 }
806 #endif
807
808 pTrans->TransactionDetails[0] = cpu_to_le32((cur_naa << 16) |
809 (skb->mac.raw[0] << 8) |
810 (skb->mac.raw[1] << 0));
811 pTrans->TransactionDetails[1] = cpu_to_le32((skb->mac.raw[2] << 24) |
812 (skb->mac.raw[3] << 16) |
813 (skb->mac.raw[4] << 8) |
814 (skb->mac.raw[5] << 0));
815
816 pSimple = (SGESimple64_t *) &pTrans->TransactionDetails[2];
817
818 /* If we ever decide to send more than one Simple SGE per LANSend, then
819 we will need to make sure that LAST_ELEMENT only gets set on the
820 last one. Otherwise, bad voodoo and evil funkiness will commence. */
821 pSimple->FlagsLength = cpu_to_le32(
822 ((MPI_SGE_FLAGS_LAST_ELEMENT |
823 MPI_SGE_FLAGS_END_OF_BUFFER |
824 MPI_SGE_FLAGS_SIMPLE_ELEMENT |
825 MPI_SGE_FLAGS_SYSTEM_ADDRESS |
826 MPI_SGE_FLAGS_HOST_TO_IOC |
827 MPI_SGE_FLAGS_64_BIT_ADDRESSING |
828 MPI_SGE_FLAGS_END_OF_LIST) << MPI_SGE_FLAGS_SHIFT) |
829 skb->len);
830 pSimple->Address.Low = cpu_to_le32((u32) dma);
831 if (sizeof(dma_addr_t) > sizeof(u32))
832 pSimple->Address.High = cpu_to_le32((u32) ((u64) dma >> 32));
833 else
834 pSimple->Address.High = 0;
835
836 mpt_put_msg_frame (LanCtx, mpt_dev, mf);
837 dev->trans_start = jiffies;
838
839 dioprintk((KERN_INFO MYNAM ": %s/%s: Sending packet. FlagsLength = %08x.\n",
840 IOC_AND_NETDEV_NAMES_s_s(dev),
841 le32_to_cpu(pSimple->FlagsLength)));
842
843 return 0;
844 }
845
846 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
847 static void
848 mpt_lan_wake_post_buckets_task(struct net_device *dev, int priority)
849 /*
850 * @priority: 0 = put it on the timer queue, 1 = put it on the immediate queue
851 */
852 {
853 struct mpt_lan_priv *priv = dev->priv;
854
855 if (test_and_set_bit(0, &priv->post_buckets_active) == 0) {
856 if (priority) {
857 schedule_work(&priv->post_buckets_task);
858 } else {
859 schedule_delayed_work(&priv->post_buckets_task, 1);
860 dioprintk((KERN_INFO MYNAM ": post_buckets queued on "
861 "timer.\n"));
862 }
863 dioprintk((KERN_INFO MYNAM ": %s/%s: Queued post_buckets task.\n",
864 IOC_AND_NETDEV_NAMES_s_s(dev) ));
865 }
866 }
867
868 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
869 static int
870 mpt_lan_receive_skb(struct net_device *dev, struct sk_buff *skb)
871 {
872 struct mpt_lan_priv *priv = dev->priv;
873
874 skb->protocol = mpt_lan_type_trans(skb, dev);
875
876 dioprintk((KERN_INFO MYNAM ": %s/%s: Incoming packet (%d bytes) "
877 "delivered to upper level.\n",
878 IOC_AND_NETDEV_NAMES_s_s(dev), skb->len));
879
880 priv->stats.rx_bytes += skb->len;
881 priv->stats.rx_packets++;
882
883 skb->dev = dev;
884 netif_rx(skb);
885
886 dioprintk((MYNAM "/receive_skb: %d buckets remaining\n",
887 atomic_read(&priv->buckets_out)));
888
889 if (atomic_read(&priv->buckets_out) < priv->bucketthresh)
890 mpt_lan_wake_post_buckets_task(dev, 1);
891
892 dioprintk((KERN_INFO MYNAM "/receive_post_reply: %d buckets "
893 "remaining, %d received back since sod\n",
894 atomic_read(&priv->buckets_out), priv->total_received));
895
896 return 0;
897 }
898
899 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
900 //static inline int
901 static int
902 mpt_lan_receive_post_turbo(struct net_device *dev, u32 tmsg)
903 {
904 struct mpt_lan_priv *priv = dev->priv;
905 MPT_ADAPTER *mpt_dev = priv->mpt_dev;
906 struct sk_buff *skb, *old_skb;
907 unsigned long flags;
908 u32 ctx, len;
909
910 ctx = GET_LAN_BUCKET_CONTEXT(tmsg);
911 skb = priv->RcvCtl[ctx].skb;
912
913 len = GET_LAN_PACKET_LENGTH(tmsg);
914
915 if (len < MPT_LAN_RX_COPYBREAK) {
916 old_skb = skb;
917
918 skb = (struct sk_buff *)dev_alloc_skb(len);
919 if (!skb) {
920 printk (KERN_ERR MYNAM ": %s/%s: ERROR - Can't allocate skb! (%s@%d)\n",
921 IOC_AND_NETDEV_NAMES_s_s(dev),
922 __FILE__, __LINE__);
923 return -ENOMEM;
924 }
925
926 pci_dma_sync_single_for_cpu(mpt_dev->pcidev, priv->RcvCtl[ctx].dma,
927 priv->RcvCtl[ctx].len, PCI_DMA_FROMDEVICE);
928
929 memcpy(skb_put(skb, len), old_skb->data, len);
930
931 pci_dma_sync_single_for_device(mpt_dev->pcidev, priv->RcvCtl[ctx].dma,
932 priv->RcvCtl[ctx].len, PCI_DMA_FROMDEVICE);
933 goto out;
934 }
935
936 skb_put(skb, len);
937
938 priv->RcvCtl[ctx].skb = NULL;
939
940 pci_unmap_single(mpt_dev->pcidev, priv->RcvCtl[ctx].dma,
941 priv->RcvCtl[ctx].len, PCI_DMA_FROMDEVICE);
942
943 out:
944 spin_lock_irqsave(&priv->rxfidx_lock, flags);
945 priv->mpt_rxfidx[++priv->mpt_rxfidx_tail] = ctx;
946 spin_unlock_irqrestore(&priv->rxfidx_lock, flags);
947
948 atomic_dec(&priv->buckets_out);
949 priv->total_received++;
950
951 return mpt_lan_receive_skb(dev, skb);
952 }
953
954 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
955 static int
956 mpt_lan_receive_post_free(struct net_device *dev,
957 LANReceivePostReply_t *pRecvRep)
958 {
959 struct mpt_lan_priv *priv = dev->priv;
960 MPT_ADAPTER *mpt_dev = priv->mpt_dev;
961 unsigned long flags;
962 struct sk_buff *skb;
963 u32 ctx;
964 int count;
965 int i;
966
967 count = pRecvRep->NumberOfContexts;
968
969 /**/ dlprintk((KERN_INFO MYNAM "/receive_post_reply: "
970 "IOC returned %d buckets, freeing them...\n", count));
971
972 spin_lock_irqsave(&priv->rxfidx_lock, flags);
973 for (i = 0; i < count; i++) {
974 ctx = le32_to_cpu(pRecvRep->BucketContext[i]);
975
976 skb = priv->RcvCtl[ctx].skb;
977
978 // dlprintk((KERN_INFO MYNAM ": %s: dev_name = %s\n",
979 // IOC_AND_NETDEV_NAMES_s_s(dev)));
980 // dlprintk((KERN_INFO MYNAM "@rpr[2], priv = %p, buckets_out addr = %p",
981 // priv, &(priv->buckets_out)));
982 // dlprintk((KERN_INFO MYNAM "@rpr[2] TC + 3\n"));
983
984 priv->RcvCtl[ctx].skb = NULL;
985 pci_unmap_single(mpt_dev->pcidev, priv->RcvCtl[ctx].dma,
986 priv->RcvCtl[ctx].len, PCI_DMA_FROMDEVICE);
987 dev_kfree_skb_any(skb);
988
989 priv->mpt_rxfidx[++priv->mpt_rxfidx_tail] = ctx;
990 }
991 spin_unlock_irqrestore(&priv->rxfidx_lock, flags);
992
993 atomic_sub(count, &priv->buckets_out);
994
995 // for (i = 0; i < priv->max_buckets_out; i++)
996 // if (priv->RcvCtl[i].skb != NULL)
997 // dlprintk((KERN_INFO MYNAM "@rpr: bucket %03x "
998 // "is still out\n", i));
999
1000 /* dlprintk((KERN_INFO MYNAM "/receive_post_reply: freed %d buckets\n",
1001 count));
1002 */
1003 /**/ dlprintk((KERN_INFO MYNAM "@receive_post_reply: %d buckets "
1004 /**/ "remaining, %d received back since sod.\n",
1005 /**/ atomic_read(&priv->buckets_out), priv->total_received));
1006 return 0;
1007 }
1008
1009 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
1010 static int
1011 mpt_lan_receive_post_reply(struct net_device *dev,
1012 LANReceivePostReply_t *pRecvRep)
1013 {
1014 struct mpt_lan_priv *priv = dev->priv;
1015 MPT_ADAPTER *mpt_dev = priv->mpt_dev;
1016 struct sk_buff *skb, *old_skb;
1017 unsigned long flags;
1018 u32 len, ctx, offset;
1019 u32 remaining = le32_to_cpu(pRecvRep->BucketsRemaining);
1020 int count;
1021 int i, l;
1022
1023 dioprintk((KERN_INFO MYNAM ": mpt_lan_receive_post_reply called\n"));
1024 dioprintk((KERN_INFO MYNAM ": receive_post_reply: IOCStatus: %04x\n",
1025 le16_to_cpu(pRecvRep->IOCStatus)));
1026
1027 if ((le16_to_cpu(pRecvRep->IOCStatus) & MPI_IOCSTATUS_MASK) ==
1028 MPI_IOCSTATUS_LAN_CANCELED)
1029 return mpt_lan_receive_post_free(dev, pRecvRep);
1030
1031 len = le32_to_cpu(pRecvRep->PacketLength);
1032 if (len == 0) {
1033 printk (KERN_ERR MYNAM ": %s/%s: ERROR - Got a non-TURBO "
1034 "ReceivePostReply w/ PacketLength zero!\n",
1035 IOC_AND_NETDEV_NAMES_s_s(dev));
1036 printk (KERN_ERR MYNAM ": MsgFlags = %02x, IOCStatus = %04x\n",
1037 pRecvRep->MsgFlags, le16_to_cpu(pRecvRep->IOCStatus));
1038 return -1;
1039 }
1040
1041 ctx = le32_to_cpu(pRecvRep->BucketContext[0]);
1042 count = pRecvRep->NumberOfContexts;
1043 skb = priv->RcvCtl[ctx].skb;
1044
1045 offset = le32_to_cpu(pRecvRep->PacketOffset);
1046 // if (offset != 0) {
1047 // printk (KERN_INFO MYNAM ": %s/%s: Got a ReceivePostReply "
1048 // "w/ PacketOffset %u\n",
1049 // IOC_AND_NETDEV_NAMES_s_s(dev),
1050 // offset);
1051 // }
1052
1053 dioprintk((KERN_INFO MYNAM ": %s/%s: @rpr, offset = %d, len = %d\n",
1054 IOC_AND_NETDEV_NAMES_s_s(dev),
1055 offset, len));
1056
1057 if (count > 1) {
1058 int szrem = len;
1059
1060 // dioprintk((KERN_INFO MYNAM ": %s/%s: Multiple buckets returned "
1061 // "for single packet, concatenating...\n",
1062 // IOC_AND_NETDEV_NAMES_s_s(dev)));
1063
1064 skb = (struct sk_buff *)dev_alloc_skb(len);
1065 if (!skb) {
1066 printk (KERN_ERR MYNAM ": %s/%s: ERROR - Can't allocate skb! (%s@%d)\n",
1067 IOC_AND_NETDEV_NAMES_s_s(dev),
1068 __FILE__, __LINE__);
1069 return -ENOMEM;
1070 }
1071
1072 spin_lock_irqsave(&priv->rxfidx_lock, flags);
1073 for (i = 0; i < count; i++) {
1074
1075 ctx = le32_to_cpu(pRecvRep->BucketContext[i]);
1076 old_skb = priv->RcvCtl[ctx].skb;
1077
1078 l = priv->RcvCtl[ctx].len;
1079 if (szrem < l)
1080 l = szrem;
1081
1082 // dioprintk((KERN_INFO MYNAM ": %s/%s: Buckets = %d, len = %u\n",
1083 // IOC_AND_NETDEV_NAMES_s_s(dev),
1084 // i, l));
1085
1086 pci_dma_sync_single_for_cpu(mpt_dev->pcidev,
1087 priv->RcvCtl[ctx].dma,
1088 priv->RcvCtl[ctx].len,
1089 PCI_DMA_FROMDEVICE);
1090 memcpy(skb_put(skb, l), old_skb->data, l);
1091
1092 pci_dma_sync_single_for_device(mpt_dev->pcidev,
1093 priv->RcvCtl[ctx].dma,
1094 priv->RcvCtl[ctx].len,
1095 PCI_DMA_FROMDEVICE);
1096
1097 priv->mpt_rxfidx[++priv->mpt_rxfidx_tail] = ctx;
1098 szrem -= l;
1099 }
1100 spin_unlock_irqrestore(&priv->rxfidx_lock, flags);
1101
1102 } else if (len < MPT_LAN_RX_COPYBREAK) {
1103
1104 old_skb = skb;
1105
1106 skb = (struct sk_buff *)dev_alloc_skb(len);
1107 if (!skb) {
1108 printk (KERN_ERR MYNAM ": %s/%s: ERROR - Can't allocate skb! (%s@%d)\n",
1109 IOC_AND_NETDEV_NAMES_s_s(dev),
1110 __FILE__, __LINE__);
1111 return -ENOMEM;
1112 }
1113
1114 pci_dma_sync_single_for_cpu(mpt_dev->pcidev,
1115 priv->RcvCtl[ctx].dma,
1116 priv->RcvCtl[ctx].len,
1117 PCI_DMA_FROMDEVICE);
1118
1119 memcpy(skb_put(skb, len), old_skb->data, len);
1120
1121 pci_dma_sync_single_for_device(mpt_dev->pcidev,
1122 priv->RcvCtl[ctx].dma,
1123 priv->RcvCtl[ctx].len,
1124 PCI_DMA_FROMDEVICE);
1125
1126 spin_lock_irqsave(&priv->rxfidx_lock, flags);
1127 priv->mpt_rxfidx[++priv->mpt_rxfidx_tail] = ctx;
1128 spin_unlock_irqrestore(&priv->rxfidx_lock, flags);
1129
1130 } else {
1131 spin_lock_irqsave(&priv->rxfidx_lock, flags);
1132
1133 priv->RcvCtl[ctx].skb = NULL;
1134
1135 pci_unmap_single(mpt_dev->pcidev, priv->RcvCtl[ctx].dma,
1136 priv->RcvCtl[ctx].len, PCI_DMA_FROMDEVICE);
1137 priv->RcvCtl[ctx].dma = 0;
1138
1139 priv->mpt_rxfidx[++priv->mpt_rxfidx_tail] = ctx;
1140 spin_unlock_irqrestore(&priv->rxfidx_lock, flags);
1141
1142 skb_put(skb,len);
1143 }
1144
1145 atomic_sub(count, &priv->buckets_out);
1146 priv->total_received += count;
1147
1148 if (priv->mpt_rxfidx_tail >= MPT_LAN_MAX_BUCKETS_OUT) {
1149 printk (KERN_ERR MYNAM ": %s/%s: Yoohoo! mpt_rxfidx_tail = %d, "
1150 "MPT_LAN_MAX_BUCKETS_OUT = %d\n",
1151 IOC_AND_NETDEV_NAMES_s_s(dev),
1152 priv->mpt_rxfidx_tail,
1153 MPT_LAN_MAX_BUCKETS_OUT);
1154
1155 return -1;
1156 }
1157
1158 if (remaining == 0)
1159 printk (KERN_WARNING MYNAM ": %s/%s: WARNING - IOC out of buckets! "
1160 "(priv->buckets_out = %d)\n",
1161 IOC_AND_NETDEV_NAMES_s_s(dev),
1162 atomic_read(&priv->buckets_out));
1163 else if (remaining < 10)
1164 printk (KERN_INFO MYNAM ": %s/%s: IOC says %d buckets left. "
1165 "(priv->buckets_out = %d)\n",
1166 IOC_AND_NETDEV_NAMES_s_s(dev),
1167 remaining, atomic_read(&priv->buckets_out));
1168
1169 if ((remaining < priv->bucketthresh) &&
1170 ((atomic_read(&priv->buckets_out) - remaining) >
1171 MPT_LAN_BUCKETS_REMAIN_MISMATCH_THRESH)) {
1172
1173 printk (KERN_WARNING MYNAM " Mismatch between driver's "
1174 "buckets_out count and fw's BucketsRemaining "
1175 "count has crossed the threshold, issuing a "
1176 "LanReset to clear the fw's hashtable. You may "
1177 "want to check your /var/log/messages for \"CRC "
1178 "error\" event notifications.\n");
1179
1180 mpt_lan_reset(dev);
1181 mpt_lan_wake_post_buckets_task(dev, 0);
1182 }
1183
1184 return mpt_lan_receive_skb(dev, skb);
1185 }
1186
1187 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
1188 /* Simple SGE's only at the moment */
1189
1190 static void
1191 mpt_lan_post_receive_buckets(void *dev_id)
1192 {
1193 struct net_device *dev = dev_id;
1194 struct mpt_lan_priv *priv = dev->priv;
1195 MPT_ADAPTER *mpt_dev = priv->mpt_dev;
1196 MPT_FRAME_HDR *mf;
1197 LANReceivePostRequest_t *pRecvReq;
1198 SGETransaction32_t *pTrans;
1199 SGESimple64_t *pSimple;
1200 struct sk_buff *skb;
1201 dma_addr_t dma;
1202 u32 curr, buckets, count, max;
1203 u32 len = (dev->mtu + dev->hard_header_len + 4);
1204 unsigned long flags;
1205 int i;
1206
1207 curr = atomic_read(&priv->buckets_out);
1208 buckets = (priv->max_buckets_out - curr);
1209
1210 dioprintk((KERN_INFO MYNAM ": %s/%s: @%s, Start_buckets = %u, buckets_out = %u\n",
1211 IOC_AND_NETDEV_NAMES_s_s(dev),
1212 __FUNCTION__, buckets, curr));
1213
1214 max = (mpt_dev->req_sz - MPT_LAN_RECEIVE_POST_REQUEST_SIZE) /
1215 (MPT_LAN_TRANSACTION32_SIZE + sizeof(SGESimple64_t));
1216
1217 while (buckets) {
1218 mf = mpt_get_msg_frame(LanCtx, mpt_dev);
1219 if (mf == NULL) {
1220 printk (KERN_ERR "%s: Unable to alloc request frame\n",
1221 __FUNCTION__);
1222 dioprintk((KERN_ERR "%s: %u buckets remaining\n",
1223 __FUNCTION__, buckets));
1224 goto out;
1225 }
1226 pRecvReq = (LANReceivePostRequest_t *) mf;
1227
1228 count = buckets;
1229 if (count > max)
1230 count = max;
1231
1232 pRecvReq->Function = MPI_FUNCTION_LAN_RECEIVE;
1233 pRecvReq->ChainOffset = 0;
1234 pRecvReq->MsgFlags = 0;
1235 pRecvReq->PortNumber = priv->pnum;
1236
1237 pTrans = (SGETransaction32_t *) pRecvReq->SG_List;
1238 pSimple = NULL;
1239
1240 for (i = 0; i < count; i++) {
1241 int ctx;
1242
1243 spin_lock_irqsave(&priv->rxfidx_lock, flags);
1244 if (priv->mpt_rxfidx_tail < 0) {
1245 printk (KERN_ERR "%s: Can't alloc context\n",
1246 __FUNCTION__);
1247 spin_unlock_irqrestore(&priv->rxfidx_lock,
1248 flags);
1249 break;
1250 }
1251
1252 ctx = priv->mpt_rxfidx[priv->mpt_rxfidx_tail--];
1253
1254 skb = priv->RcvCtl[ctx].skb;
1255 if (skb && (priv->RcvCtl[ctx].len != len)) {
1256 pci_unmap_single(mpt_dev->pcidev,
1257 priv->RcvCtl[ctx].dma,
1258 priv->RcvCtl[ctx].len,
1259 PCI_DMA_FROMDEVICE);
1260 dev_kfree_skb(priv->RcvCtl[ctx].skb);
1261 skb = priv->RcvCtl[ctx].skb = NULL;
1262 }
1263
1264 if (skb == NULL) {
1265 skb = dev_alloc_skb(len);
1266 if (skb == NULL) {
1267 printk (KERN_WARNING
1268 MYNAM "/%s: Can't alloc skb\n",
1269 __FUNCTION__);
1270 priv->mpt_rxfidx[++priv->mpt_rxfidx_tail] = ctx;
1271 spin_unlock_irqrestore(&priv->rxfidx_lock, flags);
1272 break;
1273 }
1274
1275 dma = pci_map_single(mpt_dev->pcidev, skb->data,
1276 len, PCI_DMA_FROMDEVICE);
1277
1278 priv->RcvCtl[ctx].skb = skb;
1279 priv->RcvCtl[ctx].dma = dma;
1280 priv->RcvCtl[ctx].len = len;
1281 }
1282
1283 spin_unlock_irqrestore(&priv->rxfidx_lock, flags);
1284
1285 pTrans->ContextSize = sizeof(u32);
1286 pTrans->DetailsLength = 0;
1287 pTrans->Flags = 0;
1288 pTrans->TransactionContext[0] = cpu_to_le32(ctx);
1289
1290 pSimple = (SGESimple64_t *) pTrans->TransactionDetails;
1291
1292 pSimple->FlagsLength = cpu_to_le32(
1293 ((MPI_SGE_FLAGS_END_OF_BUFFER |
1294 MPI_SGE_FLAGS_SIMPLE_ELEMENT |
1295 MPI_SGE_FLAGS_64_BIT_ADDRESSING) << MPI_SGE_FLAGS_SHIFT) | len);
1296 pSimple->Address.Low = cpu_to_le32((u32) priv->RcvCtl[ctx].dma);
1297 if (sizeof(dma_addr_t) > sizeof(u32))
1298 pSimple->Address.High = cpu_to_le32((u32) ((u64) priv->RcvCtl[ctx].dma >> 32));
1299 else
1300 pSimple->Address.High = 0;
1301
1302 pTrans = (SGETransaction32_t *) (pSimple + 1);
1303 }
1304
1305 if (pSimple == NULL) {
1306 /**/ printk (KERN_WARNING MYNAM "/%s: No buckets posted\n",
1307 /**/ __FUNCTION__);
1308 mpt_free_msg_frame(mpt_dev, mf);
1309 goto out;
1310 }
1311
1312 pSimple->FlagsLength |= cpu_to_le32(MPI_SGE_FLAGS_END_OF_LIST << MPI_SGE_FLAGS_SHIFT);
1313
1314 pRecvReq->BucketCount = cpu_to_le32(i);
1315
1316 /* printk(KERN_INFO MYNAM ": posting buckets\n ");
1317 * for (i = 0; i < j + 2; i ++)
1318 * printk (" %08x", le32_to_cpu(msg[i]));
1319 * printk ("\n");
1320 */
1321
1322 mpt_put_msg_frame(LanCtx, mpt_dev, mf);
1323
1324 priv->total_posted += i;
1325 buckets -= i;
1326 atomic_add(i, &priv->buckets_out);
1327 }
1328
1329 out:
1330 dioprintk((KERN_INFO MYNAM "/%s: End_buckets = %u, priv->buckets_out = %u\n",
1331 __FUNCTION__, buckets, atomic_read(&priv->buckets_out)));
1332 dioprintk((KERN_INFO MYNAM "/%s: Posted %u buckets and received %u back\n",
1333 __FUNCTION__, priv->total_posted, priv->total_received));
1334
1335 clear_bit(0, &priv->post_buckets_active);
1336 }
1337
1338 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
1339 static struct net_device *
1340 mpt_register_lan_device (MPT_ADAPTER *mpt_dev, int pnum)
1341 {
1342 struct net_device *dev = alloc_fcdev(sizeof(struct mpt_lan_priv));
1343 struct mpt_lan_priv *priv = NULL;
1344 u8 HWaddr[FC_ALEN], *a;
1345
1346 if (!dev)
1347 return NULL;
1348
1349 dev->mtu = MPT_LAN_MTU;
1350
1351 priv = netdev_priv(dev);
1352
1353 priv->mpt_dev = mpt_dev;
1354 priv->pnum = pnum;
1355
1356 memset(&priv->post_buckets_task, 0, sizeof(struct work_struct));
1357 INIT_WORK(&priv->post_buckets_task, mpt_lan_post_receive_buckets, dev);
1358 priv->post_buckets_active = 0;
1359
1360 dlprintk((KERN_INFO MYNAM "@%d: bucketlen = %d\n",
1361 __LINE__, dev->mtu + dev->hard_header_len + 4));
1362
1363 atomic_set(&priv->buckets_out, 0);
1364 priv->total_posted = 0;
1365 priv->total_received = 0;
1366 priv->max_buckets_out = max_buckets_out;
1367 if (mpt_dev->pfacts[0].MaxLanBuckets < max_buckets_out)
1368 priv->max_buckets_out = mpt_dev->pfacts[0].MaxLanBuckets;
1369
1370 dlprintk((KERN_INFO MYNAM "@%d: MaxLanBuckets=%d, max_buckets_out/priv=%d/%d\n",
1371 __LINE__,
1372 mpt_dev->pfacts[0].MaxLanBuckets,
1373 max_buckets_out,
1374 priv->max_buckets_out));
1375
1376 priv->bucketthresh = priv->max_buckets_out * 2 / 3;
1377 spin_lock_init(&priv->txfidx_lock);
1378 spin_lock_init(&priv->rxfidx_lock);
1379
1380 memset(&priv->stats, 0, sizeof(priv->stats));
1381
1382 /* Grab pre-fetched LANPage1 stuff. :-) */
1383 a = (u8 *) &mpt_dev->lan_cnfg_page1.HardwareAddressLow;
1384
1385 HWaddr[0] = a[5];
1386 HWaddr[1] = a[4];
1387 HWaddr[2] = a[3];
1388 HWaddr[3] = a[2];
1389 HWaddr[4] = a[1];
1390 HWaddr[5] = a[0];
1391
1392 dev->addr_len = FC_ALEN;
1393 memcpy(dev->dev_addr, HWaddr, FC_ALEN);
1394 memset(dev->broadcast, 0xff, FC_ALEN);
1395
1396 /* The Tx queue is 127 deep on the 909.
1397 * Give ourselves some breathing room.
1398 */
1399 priv->tx_max_out = (tx_max_out_p <= MPT_TX_MAX_OUT_LIM) ?
1400 tx_max_out_p : MPT_TX_MAX_OUT_LIM;
1401
1402 dev->open = mpt_lan_open;
1403 dev->stop = mpt_lan_close;
1404 dev->get_stats = mpt_lan_get_stats;
1405 dev->set_multicast_list = NULL;
1406 dev->change_mtu = mpt_lan_change_mtu;
1407 dev->hard_start_xmit = mpt_lan_sdu_send;
1408
1409 /* Not in 2.3.42. Need 2.3.45+ */
1410 dev->tx_timeout = mpt_lan_tx_timeout;
1411 dev->watchdog_timeo = MPT_LAN_TX_TIMEOUT;
1412
1413 dlprintk((KERN_INFO MYNAM ": Finished registering dev "
1414 "and setting initial values\n"));
1415
1416 SET_MODULE_OWNER(dev);
1417
1418 if (register_netdev(dev) != 0) {
1419 free_netdev(dev);
1420 dev = NULL;
1421 }
1422 return dev;
1423 }
1424
1425 static int
1426 mptlan_probe(struct pci_dev *pdev, const struct pci_device_id *id)
1427 {
1428 MPT_ADAPTER *ioc = pci_get_drvdata(pdev);
1429 struct net_device *dev;
1430 int i;
1431
1432 for (i = 0; i < ioc->facts.NumberOfPorts; i++) {
1433 printk(KERN_INFO MYNAM ": %s: PortNum=%x, "
1434 "ProtocolFlags=%02Xh (%c%c%c%c)\n",
1435 ioc->name, ioc->pfacts[i].PortNumber,
1436 ioc->pfacts[i].ProtocolFlags,
1437 MPT_PROTOCOL_FLAGS_c_c_c_c(
1438 ioc->pfacts[i].ProtocolFlags));
1439
1440 if (!(ioc->pfacts[i].ProtocolFlags &
1441 MPI_PORTFACTS_PROTOCOL_LAN)) {
1442 printk(KERN_INFO MYNAM ": %s: Hmmm... LAN protocol "
1443 "seems to be disabled on this adapter port!\n",
1444 ioc->name);
1445 continue;
1446 }
1447
1448 dev = mpt_register_lan_device(ioc, i);
1449 if (!dev) {
1450 printk(KERN_ERR MYNAM ": %s: Unable to register "
1451 "port%d as a LAN device\n", ioc->name,
1452 ioc->pfacts[i].PortNumber);
1453 continue;
1454 }
1455
1456 printk(KERN_INFO MYNAM ": %s: Fusion MPT LAN device "
1457 "registered as '%s'\n", ioc->name, dev->name);
1458 printk(KERN_INFO MYNAM ": %s/%s: "
1459 "LanAddr = %02X:%02X:%02X:%02X:%02X:%02X\n",
1460 IOC_AND_NETDEV_NAMES_s_s(dev),
1461 dev->dev_addr[0], dev->dev_addr[1],
1462 dev->dev_addr[2], dev->dev_addr[3],
1463 dev->dev_addr[4], dev->dev_addr[5]);
1464
1465 ioc->netdev = dev;
1466
1467 return 0;
1468 }
1469
1470 return -ENODEV;
1471 }
1472
1473 static void
1474 mptlan_remove(struct pci_dev *pdev)
1475 {
1476 MPT_ADAPTER *ioc = pci_get_drvdata(pdev);
1477 struct net_device *dev = ioc->netdev;
1478
1479 if(dev != NULL) {
1480 unregister_netdev(dev);
1481 free_netdev(dev);
1482 }
1483 }
1484
1485 static struct mpt_pci_driver mptlan_driver = {
1486 .probe = mptlan_probe,
1487 .remove = mptlan_remove,
1488 };
1489
1490 static int __init mpt_lan_init (void)
1491 {
1492 show_mptmod_ver(LANAME, LANVER);
1493
1494 if ((LanCtx = mpt_register(lan_reply, MPTLAN_DRIVER)) <= 0) {
1495 printk (KERN_ERR MYNAM ": Failed to register with MPT base driver\n");
1496 return -EBUSY;
1497 }
1498
1499 /* Set the callback index to be used by driver core for turbo replies */
1500 mpt_lan_index = LanCtx;
1501
1502 dlprintk((KERN_INFO MYNAM ": assigned context of %d\n", LanCtx));
1503
1504 if (mpt_reset_register(LanCtx, mpt_lan_ioc_reset)) {
1505 printk(KERN_ERR MYNAM ": Eieee! unable to register a reset "
1506 "handler with mptbase! The world is at an end! "
1507 "Everything is fading to black! Goodbye.\n");
1508 return -EBUSY;
1509 }
1510
1511 dlprintk((KERN_INFO MYNAM ": Registered for IOC reset notifications\n"));
1512
1513 if (mpt_device_driver_register(&mptlan_driver, MPTLAN_DRIVER))
1514 dprintk((KERN_INFO MYNAM ": failed to register dd callbacks\n"));
1515 return 0;
1516 }
1517
1518 static void __exit mpt_lan_exit(void)
1519 {
1520 mpt_device_driver_deregister(MPTLAN_DRIVER);
1521 mpt_reset_deregister(LanCtx);
1522
1523 if (LanCtx >= 0) {
1524 mpt_deregister(LanCtx);
1525 LanCtx = -1;
1526 mpt_lan_index = 0;
1527 }
1528 }
1529
1530 module_init(mpt_lan_init);
1531 module_exit(mpt_lan_exit);
1532
1533 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
1534 static unsigned short
1535 mpt_lan_type_trans(struct sk_buff *skb, struct net_device *dev)
1536 {
1537 struct mpt_lan_ohdr *fch = (struct mpt_lan_ohdr *)skb->data;
1538 struct fcllc *fcllc;
1539
1540 skb->mac.raw = skb->data;
1541 skb_pull(skb, sizeof(struct mpt_lan_ohdr));
1542
1543 if (fch->dtype == htons(0xffff)) {
1544 u32 *p = (u32 *) fch;
1545
1546 swab32s(p + 0);
1547 swab32s(p + 1);
1548 swab32s(p + 2);
1549 swab32s(p + 3);
1550
1551 printk (KERN_WARNING MYNAM ": %s: WARNING - Broadcast swap F/W bug detected!\n",
1552 NETDEV_PTR_TO_IOC_NAME_s(dev));
1553 printk (KERN_WARNING MYNAM ": Please update sender @ MAC_addr = %02x:%02x:%02x:%02x:%02x:%02x\n",
1554 fch->saddr[0], fch->saddr[1], fch->saddr[2],
1555 fch->saddr[3], fch->saddr[4], fch->saddr[5]);
1556 }
1557
1558 if (*fch->daddr & 1) {
1559 if (!memcmp(fch->daddr, dev->broadcast, FC_ALEN)) {
1560 skb->pkt_type = PACKET_BROADCAST;
1561 } else {
1562 skb->pkt_type = PACKET_MULTICAST;
1563 }
1564 } else {
1565 if (memcmp(fch->daddr, dev->dev_addr, FC_ALEN)) {
1566 skb->pkt_type = PACKET_OTHERHOST;
1567 } else {
1568 skb->pkt_type = PACKET_HOST;
1569 }
1570 }
1571
1572 fcllc = (struct fcllc *)skb->data;
1573
1574 #ifdef QLOGIC_NAA_WORKAROUND
1575 {
1576 u16 source_naa = fch->stype, found = 0;
1577
1578 /* Workaround for QLogic not following RFC 2625 in regards to the NAA
1579 value. */
1580
1581 if ((source_naa & 0xF000) == 0)
1582 source_naa = swab16(source_naa);
1583
1584 if (fcllc->ethertype == htons(ETH_P_ARP))
1585 dlprintk ((KERN_INFO "mptlan/type_trans: got arp req/rep w/ naa of "
1586 "%04x.\n", source_naa));
1587
1588 if ((fcllc->ethertype == htons(ETH_P_ARP)) &&
1589 ((source_naa >> 12) != MPT_LAN_NAA_RFC2625)){
1590 struct NAA_Hosed *nh, *prevnh;
1591 int i;
1592
1593 dlprintk ((KERN_INFO "mptlan/type_trans: ARP Req/Rep from "
1594 "system with non-RFC 2625 NAA value (%04x).\n",
1595 source_naa));
1596
1597 write_lock_irq(&bad_naa_lock);
1598 for (prevnh = nh = mpt_bad_naa; nh != NULL;
1599 prevnh=nh, nh=nh->next) {
1600 if ((nh->ieee[0] == fch->saddr[0]) &&
1601 (nh->ieee[1] == fch->saddr[1]) &&
1602 (nh->ieee[2] == fch->saddr[2]) &&
1603 (nh->ieee[3] == fch->saddr[3]) &&
1604 (nh->ieee[4] == fch->saddr[4]) &&
1605 (nh->ieee[5] == fch->saddr[5])) {
1606 found = 1;
1607 dlprintk ((KERN_INFO "mptlan/type_trans: ARP Re"
1608 "q/Rep w/ bad NAA from system already"
1609 " in DB.\n"));
1610 break;
1611 }
1612 }
1613
1614 if ((!found) && (nh == NULL)) {
1615
1616 nh = kmalloc(sizeof(struct NAA_Hosed), GFP_KERNEL);
1617 dlprintk ((KERN_INFO "mptlan/type_trans: ARP Req/Rep w/"
1618 " bad NAA from system not yet in DB.\n"));
1619
1620 if (nh != NULL) {
1621 nh->next = NULL;
1622 if (!mpt_bad_naa)
1623 mpt_bad_naa = nh;
1624 if (prevnh)
1625 prevnh->next = nh;
1626
1627 nh->NAA = source_naa; /* Set the S_NAA value. */
1628 for (i = 0; i < FC_ALEN; i++)
1629 nh->ieee[i] = fch->saddr[i];
1630 dlprintk ((KERN_INFO "Got ARP from %02x:%02x:%02x:%02x:"
1631 "%02x:%02x with non-compliant S_NAA value.\n",
1632 fch->saddr[0], fch->saddr[1], fch->saddr[2],
1633 fch->saddr[3], fch->saddr[4],fch->saddr[5]));
1634 } else {
1635 printk (KERN_ERR "mptlan/type_trans: Unable to"
1636 " kmalloc a NAA_Hosed struct.\n");
1637 }
1638 } else if (!found) {
1639 printk (KERN_ERR "mptlan/type_trans: found not"
1640 " set, but nh isn't null. Evil "
1641 "funkiness abounds.\n");
1642 }
1643 write_unlock_irq(&bad_naa_lock);
1644 }
1645 }
1646 #endif
1647
1648 /* Strip the SNAP header from ARP packets since we don't
1649 * pass them through to the 802.2/SNAP layers.
1650 */
1651 if (fcllc->dsap == EXTENDED_SAP &&
1652 (fcllc->ethertype == htons(ETH_P_IP) ||
1653 fcllc->ethertype == htons(ETH_P_ARP))) {
1654 skb_pull(skb, sizeof(struct fcllc));
1655 return fcllc->ethertype;
1656 }
1657
1658 return htons(ETH_P_802_2);
1659 }
1660
1661 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
Linux kernel - Deliverables
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