1 /*
2 * linux/drivers/message/fusion/mptlan.c
3 * IP Over Fibre Channel device driver.
4 * For use with LSI Fibre Channel PCI chip/adapters
5 * running LSI Fusion MPT (Message Passing Technology) firmware.
6 *
7 * Copyright (c) 2000-2008 LSI Corporation
8 * (mailto:DL-MPTFusionLinux@lsi.com)
9 *
10 */
11 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
12 /*
13 This program is free software; you can redistribute it and/or modify
14 it under the terms of the GNU General Public License as published by
15 the Free Software Foundation; version 2 of the License.
16
17 This program is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License for more details.
21
22 NO WARRANTY
23 THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
24 CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
25 LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
26 MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
27 solely responsible for determining the appropriateness of using and
28 distributing the Program and assumes all risks associated with its
29 exercise of rights under this Agreement, including but not limited to
30 the risks and costs of program errors, damage to or loss of data,
31 programs or equipment, and unavailability or interruption of operations.
32
33 DISCLAIMER OF LIABILITY
34 NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
35 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND
37 ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
38 TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
39 USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
40 HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES
41
42 You should have received a copy of the GNU General Public License
43 along with this program; if not, write to the Free Software
44 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
45 */
46
47 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
48 /*
49 * Define statements used for debugging
50 */
51 //#define MPT_LAN_IO_DEBUG
52
53 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
54
55 #include "mptlan.h"
56 #include <linux/init.h>
57 #include <linux/module.h>
58 #include <linux/fs.h>
59 #include <linux/sched.h>
60 #include <linux/slab.h>
61
62 #define my_VERSION MPT_LINUX_VERSION_COMMON
63 #define MYNAM "mptlan"
64
65 MODULE_LICENSE("GPL");
66 MODULE_VERSION(my_VERSION);
67
68 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
69 /*
70 * MPT LAN message sizes without variable part.
71 */
72 #define MPT_LAN_RECEIVE_POST_REQUEST_SIZE \
73 (sizeof(LANReceivePostRequest_t) - sizeof(SGE_MPI_UNION))
74
75 /*
76 * Fusion MPT LAN private structures
77 */
78
79 struct BufferControl {
80 struct sk_buff *skb;
81 dma_addr_t dma;
82 unsigned int len;
83 };
84
85 struct mpt_lan_priv {
86 MPT_ADAPTER *mpt_dev;
87 u8 pnum; /* Port number in the IOC. This is not a Unix network port! */
88
89 atomic_t buckets_out; /* number of unused buckets on IOC */
90 int bucketthresh; /* Send more when this many left */
91
92 int *mpt_txfidx; /* Free Tx Context list */
93 int mpt_txfidx_tail;
94 spinlock_t txfidx_lock;
95
96 int *mpt_rxfidx; /* Free Rx Context list */
97 int mpt_rxfidx_tail;
98 spinlock_t rxfidx_lock;
99
100 struct BufferControl *RcvCtl; /* Receive BufferControl structs */
101 struct BufferControl *SendCtl; /* Send BufferControl structs */
102
103 int max_buckets_out; /* Max buckets to send to IOC */
104 int tx_max_out; /* IOC's Tx queue len */
105
106 u32 total_posted;
107 u32 total_received;
108
109 struct delayed_work post_buckets_task;
110 struct net_device *dev;
111 unsigned long post_buckets_active;
112 };
113
114 struct mpt_lan_ohdr {
115 u16 dtype;
116 u8 daddr[FC_ALEN];
117 u16 stype;
118 u8 saddr[FC_ALEN];
119 };
120
121 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
122
123 /*
124 * Forward protos...
125 */
126 static int lan_reply (MPT_ADAPTER *ioc, MPT_FRAME_HDR *mf,
127 MPT_FRAME_HDR *reply);
128 static int mpt_lan_open(struct net_device *dev);
129 static int mpt_lan_reset(struct net_device *dev);
130 static int mpt_lan_close(struct net_device *dev);
131 static void mpt_lan_post_receive_buckets(struct mpt_lan_priv *priv);
132 static void mpt_lan_wake_post_buckets_task(struct net_device *dev,
133 int priority);
134 static int mpt_lan_receive_post_turbo(struct net_device *dev, u32 tmsg);
135 static int mpt_lan_receive_post_reply(struct net_device *dev,
136 LANReceivePostReply_t *pRecvRep);
137 static int mpt_lan_send_turbo(struct net_device *dev, u32 tmsg);
138 static int mpt_lan_send_reply(struct net_device *dev,
139 LANSendReply_t *pSendRep);
140 static int mpt_lan_ioc_reset(MPT_ADAPTER *ioc, int reset_phase);
141 static int mpt_lan_event_process(MPT_ADAPTER *ioc, EventNotificationReply_t *pEvReply);
142 static unsigned short mpt_lan_type_trans(struct sk_buff *skb,
143 struct net_device *dev);
144
145 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
146 /*
147 * Fusion MPT LAN private data
148 */
149 static u8 LanCtx = MPT_MAX_PROTOCOL_DRIVERS;
150
151 static u32 max_buckets_out = 127;
152 static u32 tx_max_out_p = 127 - 16;
153
154 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
155 /**
156 * lan_reply - Handle all data sent from the hardware.
157 * @ioc: Pointer to MPT_ADAPTER structure
158 * @mf: Pointer to original MPT request frame (NULL if TurboReply)
159 * @reply: Pointer to MPT reply frame
160 *
161 * Returns 1 indicating original alloc'd request frame ptr
162 * should be freed, or 0 if it shouldn't.
163 */
164 static int
lan_reply(MPT_ADAPTER * ioc,MPT_FRAME_HDR * mf,MPT_FRAME_HDR * reply)165 lan_reply (MPT_ADAPTER *ioc, MPT_FRAME_HDR *mf, MPT_FRAME_HDR *reply)
166 {
167 struct net_device *dev = ioc->netdev;
168 int FreeReqFrame = 0;
169
170 dioprintk((KERN_INFO MYNAM ": %s/%s: Got reply.\n",
171 IOC_AND_NETDEV_NAMES_s_s(dev)));
172
173 // dioprintk((KERN_INFO MYNAM "@lan_reply: mf = %p, reply = %p\n",
174 // mf, reply));
175
176 if (mf == NULL) {
177 u32 tmsg = CAST_PTR_TO_U32(reply);
178
179 dioprintk((KERN_INFO MYNAM ": %s/%s: @lan_reply, tmsg %08x\n",
180 IOC_AND_NETDEV_NAMES_s_s(dev),
181 tmsg));
182
183 switch (GET_LAN_FORM(tmsg)) {
184
185 // NOTE! (Optimization) First case here is now caught in
186 // mptbase.c::mpt_interrupt() routine and callcack here
187 // is now skipped for this case!
188 #if 0
189 case LAN_REPLY_FORM_MESSAGE_CONTEXT:
190 // dioprintk((KERN_INFO MYNAM "/lan_reply: "
191 // "MessageContext turbo reply received\n"));
192 FreeReqFrame = 1;
193 break;
194 #endif
195
196 case LAN_REPLY_FORM_SEND_SINGLE:
197 // dioprintk((MYNAM "/lan_reply: "
198 // "calling mpt_lan_send_reply (turbo)\n"));
199
200 // Potential BUG here?
201 // FreeReqFrame = mpt_lan_send_turbo(dev, tmsg);
202 // If/when mpt_lan_send_turbo would return 1 here,
203 // calling routine (mptbase.c|mpt_interrupt)
204 // would Oops because mf has already been set
205 // to NULL. So after return from this func,
206 // mpt_interrupt() will attempt to put (NULL) mf ptr
207 // item back onto its adapter FreeQ - Oops!:-(
208 // It's Ok, since mpt_lan_send_turbo() *currently*
209 // always returns 0, but..., just in case:
210
211 (void) mpt_lan_send_turbo(dev, tmsg);
212 FreeReqFrame = 0;
213
214 break;
215
216 case LAN_REPLY_FORM_RECEIVE_SINGLE:
217 // dioprintk((KERN_INFO MYNAM "@lan_reply: "
218 // "rcv-Turbo = %08x\n", tmsg));
219 mpt_lan_receive_post_turbo(dev, tmsg);
220 break;
221
222 default:
223 printk (KERN_ERR MYNAM "/lan_reply: Got a turbo reply "
224 "that I don't know what to do with\n");
225
226 /* CHECKME! Hmmm... FreeReqFrame is 0 here; is that right? */
227
228 break;
229 }
230
231 return FreeReqFrame;
232 }
233
234 // msg = (u32 *) reply;
235 // dioprintk((KERN_INFO MYNAM "@lan_reply: msg = %08x %08x %08x %08x\n",
236 // le32_to_cpu(msg[0]), le32_to_cpu(msg[1]),
237 // le32_to_cpu(msg[2]), le32_to_cpu(msg[3])));
238 // dioprintk((KERN_INFO MYNAM "@lan_reply: Function = %02xh\n",
239 // reply->u.hdr.Function));
240
241 switch (reply->u.hdr.Function) {
242
243 case MPI_FUNCTION_LAN_SEND:
244 {
245 LANSendReply_t *pSendRep;
246
247 pSendRep = (LANSendReply_t *) reply;
248 FreeReqFrame = mpt_lan_send_reply(dev, pSendRep);
249 break;
250 }
251
252 case MPI_FUNCTION_LAN_RECEIVE:
253 {
254 LANReceivePostReply_t *pRecvRep;
255
256 pRecvRep = (LANReceivePostReply_t *) reply;
257 if (pRecvRep->NumberOfContexts) {
258 mpt_lan_receive_post_reply(dev, pRecvRep);
259 if (!(pRecvRep->MsgFlags & MPI_MSGFLAGS_CONTINUATION_REPLY))
260 FreeReqFrame = 1;
261 } else
262 dioprintk((KERN_INFO MYNAM "@lan_reply: zero context "
263 "ReceivePostReply received.\n"));
264 break;
265 }
266
267 case MPI_FUNCTION_LAN_RESET:
268 /* Just a default reply. Might want to check it to
269 * make sure that everything went ok.
270 */
271 FreeReqFrame = 1;
272 break;
273
274 case MPI_FUNCTION_EVENT_NOTIFICATION:
275 case MPI_FUNCTION_EVENT_ACK:
276 /* _EVENT_NOTIFICATION should NOT come down this path any more.
277 * Should be routed to mpt_lan_event_process(), but just in case...
278 */
279 FreeReqFrame = 1;
280 break;
281
282 default:
283 printk (KERN_ERR MYNAM "/lan_reply: Got a non-turbo "
284 "reply that I don't know what to do with\n");
285
286 /* CHECKME! Hmmm... FreeReqFrame is 0 here; is that right? */
287 FreeReqFrame = 1;
288
289 break;
290 }
291
292 return FreeReqFrame;
293 }
294
295 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
296 static int
mpt_lan_ioc_reset(MPT_ADAPTER * ioc,int reset_phase)297 mpt_lan_ioc_reset(MPT_ADAPTER *ioc, int reset_phase)
298 {
299 struct net_device *dev = ioc->netdev;
300 struct mpt_lan_priv *priv;
301
302 if (dev == NULL)
303 return(1);
304 else
305 priv = netdev_priv(dev);
306
307 dlprintk((KERN_INFO MYNAM ": IOC %s_reset routed to LAN driver!\n",
308 reset_phase==MPT_IOC_SETUP_RESET ? "setup" : (
309 reset_phase==MPT_IOC_PRE_RESET ? "pre" : "post")));
310
311 if (priv->mpt_rxfidx == NULL)
312 return (1);
313
314 if (reset_phase == MPT_IOC_SETUP_RESET) {
315 ;
316 } else if (reset_phase == MPT_IOC_PRE_RESET) {
317 int i;
318 unsigned long flags;
319
320 netif_stop_queue(dev);
321
322 dlprintk ((KERN_INFO "mptlan/ioc_reset: called netif_stop_queue for %s.\n", dev->name));
323
324 atomic_set(&priv->buckets_out, 0);
325
326 /* Reset Rx Free Tail index and re-populate the queue. */
327 spin_lock_irqsave(&priv->rxfidx_lock, flags);
328 priv->mpt_rxfidx_tail = -1;
329 for (i = 0; i < priv->max_buckets_out; i++)
330 priv->mpt_rxfidx[++priv->mpt_rxfidx_tail] = i;
331 spin_unlock_irqrestore(&priv->rxfidx_lock, flags);
332 } else {
333 mpt_lan_post_receive_buckets(priv);
334 netif_wake_queue(dev);
335 }
336
337 return 1;
338 }
339
340 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
341 static int
mpt_lan_event_process(MPT_ADAPTER * ioc,EventNotificationReply_t * pEvReply)342 mpt_lan_event_process(MPT_ADAPTER *ioc, EventNotificationReply_t *pEvReply)
343 {
344 dlprintk((KERN_INFO MYNAM ": MPT event routed to LAN driver!\n"));
345
346 switch (le32_to_cpu(pEvReply->Event)) {
347 case MPI_EVENT_NONE: /* 00 */
348 case MPI_EVENT_LOG_DATA: /* 01 */
349 case MPI_EVENT_STATE_CHANGE: /* 02 */
350 case MPI_EVENT_UNIT_ATTENTION: /* 03 */
351 case MPI_EVENT_IOC_BUS_RESET: /* 04 */
352 case MPI_EVENT_EXT_BUS_RESET: /* 05 */
353 case MPI_EVENT_RESCAN: /* 06 */
354 /* Ok, do we need to do anything here? As far as
355 I can tell, this is when a new device gets added
356 to the loop. */
357 case MPI_EVENT_LINK_STATUS_CHANGE: /* 07 */
358 case MPI_EVENT_LOOP_STATE_CHANGE: /* 08 */
359 case MPI_EVENT_LOGOUT: /* 09 */
360 case MPI_EVENT_EVENT_CHANGE: /* 0A */
361 default:
362 break;
363 }
364
365 /*
366 * NOTE: pEvent->AckRequired handling now done in mptbase.c;
367 * Do NOT do it here now!
368 */
369
370 return 1;
371 }
372
373 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
374 static int
mpt_lan_open(struct net_device * dev)375 mpt_lan_open(struct net_device *dev)
376 {
377 struct mpt_lan_priv *priv = netdev_priv(dev);
378 int i;
379
380 if (mpt_lan_reset(dev) != 0) {
381 MPT_ADAPTER *mpt_dev = priv->mpt_dev;
382
383 printk (KERN_WARNING MYNAM "/lan_open: lan_reset failed.");
384
385 if (mpt_dev->active)
386 printk ("The ioc is active. Perhaps it needs to be"
387 " reset?\n");
388 else
389 printk ("The ioc in inactive, most likely in the "
390 "process of being reset. Please try again in "
391 "a moment.\n");
392 }
393
394 priv->mpt_txfidx = kmalloc_array(priv->tx_max_out, sizeof(int),
395 GFP_KERNEL);
396 if (priv->mpt_txfidx == NULL)
397 goto out;
398 priv->mpt_txfidx_tail = -1;
399
400 priv->SendCtl = kcalloc(priv->tx_max_out, sizeof(struct BufferControl),
401 GFP_KERNEL);
402 if (priv->SendCtl == NULL)
403 goto out_mpt_txfidx;
404 for (i = 0; i < priv->tx_max_out; i++)
405 priv->mpt_txfidx[++priv->mpt_txfidx_tail] = i;
406
407 dlprintk((KERN_INFO MYNAM "@lo: Finished initializing SendCtl\n"));
408
409 priv->mpt_rxfidx = kmalloc_array(priv->max_buckets_out, sizeof(int),
410 GFP_KERNEL);
411 if (priv->mpt_rxfidx == NULL)
412 goto out_SendCtl;
413 priv->mpt_rxfidx_tail = -1;
414
415 priv->RcvCtl = kcalloc(priv->max_buckets_out,
416 sizeof(struct BufferControl),
417 GFP_KERNEL);
418 if (priv->RcvCtl == NULL)
419 goto out_mpt_rxfidx;
420 for (i = 0; i < priv->max_buckets_out; i++)
421 priv->mpt_rxfidx[++priv->mpt_rxfidx_tail] = i;
422
423 /**/ dlprintk((KERN_INFO MYNAM "/lo: txfidx contains - "));
424 /**/ for (i = 0; i < priv->tx_max_out; i++)
425 /**/ dlprintk((" %xh", priv->mpt_txfidx[i]));
426 /**/ dlprintk(("\n"));
427
428 dlprintk((KERN_INFO MYNAM "/lo: Finished initializing RcvCtl\n"));
429
430 mpt_lan_post_receive_buckets(priv);
431 printk(KERN_INFO MYNAM ": %s/%s: interface up & active\n",
432 IOC_AND_NETDEV_NAMES_s_s(dev));
433
434 if (mpt_event_register(LanCtx, mpt_lan_event_process) != 0) {
435 printk (KERN_WARNING MYNAM "/lo: Unable to register for Event"
436 " Notifications. This is a bad thing! We're not going "
437 "to go ahead, but I'd be leery of system stability at "
438 "this point.\n");
439 }
440
441 netif_start_queue(dev);
442 dlprintk((KERN_INFO MYNAM "/lo: Done.\n"));
443
444 return 0;
445 out_mpt_rxfidx:
446 kfree(priv->mpt_rxfidx);
447 priv->mpt_rxfidx = NULL;
448 out_SendCtl:
449 kfree(priv->SendCtl);
450 priv->SendCtl = NULL;
451 out_mpt_txfidx:
452 kfree(priv->mpt_txfidx);
453 priv->mpt_txfidx = NULL;
454 out: return -ENOMEM;
455 }
456
457 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
458 /* Send a LanReset message to the FW. This should result in the FW returning
459 any buckets it still has. */
460 static int
mpt_lan_reset(struct net_device * dev)461 mpt_lan_reset(struct net_device *dev)
462 {
463 MPT_FRAME_HDR *mf;
464 LANResetRequest_t *pResetReq;
465 struct mpt_lan_priv *priv = netdev_priv(dev);
466
467 mf = mpt_get_msg_frame(LanCtx, priv->mpt_dev);
468
469 if (mf == NULL) {
470 /* dlprintk((KERN_ERR MYNAM "/reset: Evil funkiness abounds! "
471 "Unable to allocate a request frame.\n"));
472 */
473 return -1;
474 }
475
476 pResetReq = (LANResetRequest_t *) mf;
477
478 pResetReq->Function = MPI_FUNCTION_LAN_RESET;
479 pResetReq->ChainOffset = 0;
480 pResetReq->Reserved = 0;
481 pResetReq->PortNumber = priv->pnum;
482 pResetReq->MsgFlags = 0;
483 pResetReq->Reserved2 = 0;
484
485 mpt_put_msg_frame(LanCtx, priv->mpt_dev, mf);
486
487 return 0;
488 }
489
490 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
491 static int
mpt_lan_close(struct net_device * dev)492 mpt_lan_close(struct net_device *dev)
493 {
494 struct mpt_lan_priv *priv = netdev_priv(dev);
495 MPT_ADAPTER *mpt_dev = priv->mpt_dev;
496 unsigned long timeout;
497 int i;
498
499 dlprintk((KERN_INFO MYNAM ": mpt_lan_close called\n"));
500
501 mpt_event_deregister(LanCtx);
502
503 dlprintk((KERN_INFO MYNAM ":lan_close: Posted %d buckets "
504 "since driver was loaded, %d still out\n",
505 priv->total_posted,atomic_read(&priv->buckets_out)));
506
507 netif_stop_queue(dev);
508
509 mpt_lan_reset(dev);
510
511 timeout = jiffies + 2 * HZ;
512 while (atomic_read(&priv->buckets_out) && time_before(jiffies, timeout))
513 schedule_timeout_interruptible(1);
514
515 for (i = 0; i < priv->max_buckets_out; i++) {
516 if (priv->RcvCtl[i].skb != NULL) {
517 /**/ dlprintk((KERN_INFO MYNAM "/lan_close: bucket %05x "
518 /**/ "is still out\n", i));
519 dma_unmap_single(&mpt_dev->pcidev->dev,
520 priv->RcvCtl[i].dma,
521 priv->RcvCtl[i].len, DMA_FROM_DEVICE);
522 dev_kfree_skb(priv->RcvCtl[i].skb);
523 }
524 }
525
526 kfree(priv->RcvCtl);
527 kfree(priv->mpt_rxfidx);
528
529 for (i = 0; i < priv->tx_max_out; i++) {
530 if (priv->SendCtl[i].skb != NULL) {
531 dma_unmap_single(&mpt_dev->pcidev->dev,
532 priv->SendCtl[i].dma,
533 priv->SendCtl[i].len, DMA_TO_DEVICE);
534 dev_kfree_skb(priv->SendCtl[i].skb);
535 }
536 }
537
538 kfree(priv->SendCtl);
539 kfree(priv->mpt_txfidx);
540
541 atomic_set(&priv->buckets_out, 0);
542
543 printk(KERN_INFO MYNAM ": %s/%s: interface down & inactive\n",
544 IOC_AND_NETDEV_NAMES_s_s(dev));
545
546 return 0;
547 }
548
549 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
550 /* Tx timeout handler. */
551 static void
mpt_lan_tx_timeout(struct net_device * dev,unsigned int txqueue)552 mpt_lan_tx_timeout(struct net_device *dev, unsigned int txqueue)
553 {
554 struct mpt_lan_priv *priv = netdev_priv(dev);
555 MPT_ADAPTER *mpt_dev = priv->mpt_dev;
556
557 if (mpt_dev->active) {
558 dlprintk (("mptlan/tx_timeout: calling netif_wake_queue for %s.\n", dev->name));
559 netif_wake_queue(dev);
560 }
561 }
562
563 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
564 //static inline int
565 static int
mpt_lan_send_turbo(struct net_device * dev,u32 tmsg)566 mpt_lan_send_turbo(struct net_device *dev, u32 tmsg)
567 {
568 struct mpt_lan_priv *priv = netdev_priv(dev);
569 MPT_ADAPTER *mpt_dev = priv->mpt_dev;
570 struct sk_buff *sent;
571 unsigned long flags;
572 u32 ctx;
573
574 ctx = GET_LAN_BUFFER_CONTEXT(tmsg);
575 sent = priv->SendCtl[ctx].skb;
576
577 dev->stats.tx_packets++;
578 dev->stats.tx_bytes += sent->len;
579
580 dioprintk((KERN_INFO MYNAM ": %s/%s: @%s, skb %p sent.\n",
581 IOC_AND_NETDEV_NAMES_s_s(dev),
582 __func__, sent));
583
584 priv->SendCtl[ctx].skb = NULL;
585 dma_unmap_single(&mpt_dev->pcidev->dev, priv->SendCtl[ctx].dma,
586 priv->SendCtl[ctx].len, DMA_TO_DEVICE);
587 dev_kfree_skb_irq(sent);
588
589 spin_lock_irqsave(&priv->txfidx_lock, flags);
590 priv->mpt_txfidx[++priv->mpt_txfidx_tail] = ctx;
591 spin_unlock_irqrestore(&priv->txfidx_lock, flags);
592
593 netif_wake_queue(dev);
594 return 0;
595 }
596
597 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
598 static int
mpt_lan_send_reply(struct net_device * dev,LANSendReply_t * pSendRep)599 mpt_lan_send_reply(struct net_device *dev, LANSendReply_t *pSendRep)
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 int FreeReqFrame = 0;
606 u32 *pContext;
607 u32 ctx;
608 u8 count;
609
610 count = pSendRep->NumberOfContexts;
611
612 dioprintk((KERN_INFO MYNAM ": send_reply: IOCStatus: %04x\n",
613 le16_to_cpu(pSendRep->IOCStatus)));
614
615 /* Add check for Loginfo Flag in IOCStatus */
616
617 switch (le16_to_cpu(pSendRep->IOCStatus) & MPI_IOCSTATUS_MASK) {
618 case MPI_IOCSTATUS_SUCCESS:
619 dev->stats.tx_packets += count;
620 break;
621
622 case MPI_IOCSTATUS_LAN_CANCELED:
623 case MPI_IOCSTATUS_LAN_TRANSMIT_ABORTED:
624 break;
625
626 case MPI_IOCSTATUS_INVALID_SGL:
627 dev->stats.tx_errors += count;
628 printk (KERN_ERR MYNAM ": %s/%s: ERROR - Invalid SGL sent to IOC!\n",
629 IOC_AND_NETDEV_NAMES_s_s(dev));
630 goto out;
631
632 default:
633 dev->stats.tx_errors += count;
634 break;
635 }
636
637 pContext = &pSendRep->BufferContext;
638
639 spin_lock_irqsave(&priv->txfidx_lock, flags);
640 while (count > 0) {
641 ctx = GET_LAN_BUFFER_CONTEXT(le32_to_cpu(*pContext));
642
643 sent = priv->SendCtl[ctx].skb;
644 dev->stats.tx_bytes += sent->len;
645
646 dioprintk((KERN_INFO MYNAM ": %s/%s: @%s, skb %p sent.\n",
647 IOC_AND_NETDEV_NAMES_s_s(dev),
648 __func__, sent));
649
650 priv->SendCtl[ctx].skb = NULL;
651 dma_unmap_single(&mpt_dev->pcidev->dev,
652 priv->SendCtl[ctx].dma,
653 priv->SendCtl[ctx].len, DMA_TO_DEVICE);
654 dev_kfree_skb_irq(sent);
655
656 priv->mpt_txfidx[++priv->mpt_txfidx_tail] = ctx;
657
658 pContext++;
659 count--;
660 }
661 spin_unlock_irqrestore(&priv->txfidx_lock, flags);
662
663 out:
664 if (!(pSendRep->MsgFlags & MPI_MSGFLAGS_CONTINUATION_REPLY))
665 FreeReqFrame = 1;
666
667 netif_wake_queue(dev);
668 return FreeReqFrame;
669 }
670
671 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
672 static netdev_tx_t
mpt_lan_sdu_send(struct sk_buff * skb,struct net_device * dev)673 mpt_lan_sdu_send (struct sk_buff *skb, struct net_device *dev)
674 {
675 struct mpt_lan_priv *priv = netdev_priv(dev);
676 MPT_ADAPTER *mpt_dev = priv->mpt_dev;
677 MPT_FRAME_HDR *mf;
678 LANSendRequest_t *pSendReq;
679 SGETransaction32_t *pTrans;
680 SGESimple64_t *pSimple;
681 const unsigned char *mac;
682 dma_addr_t dma;
683 unsigned long flags;
684 int ctx;
685 u16 cur_naa = 0x1000;
686
687 dioprintk((KERN_INFO MYNAM ": %s called, skb_addr = %p\n",
688 __func__, skb));
689
690 spin_lock_irqsave(&priv->txfidx_lock, flags);
691 if (priv->mpt_txfidx_tail < 0) {
692 netif_stop_queue(dev);
693 spin_unlock_irqrestore(&priv->txfidx_lock, flags);
694
695 printk (KERN_ERR "%s: no tx context available: %u\n",
696 __func__, priv->mpt_txfidx_tail);
697 return NETDEV_TX_BUSY;
698 }
699
700 mf = mpt_get_msg_frame(LanCtx, mpt_dev);
701 if (mf == NULL) {
702 netif_stop_queue(dev);
703 spin_unlock_irqrestore(&priv->txfidx_lock, flags);
704
705 printk (KERN_ERR "%s: Unable to alloc request frame\n",
706 __func__);
707 return NETDEV_TX_BUSY;
708 }
709
710 ctx = priv->mpt_txfidx[priv->mpt_txfidx_tail--];
711 spin_unlock_irqrestore(&priv->txfidx_lock, flags);
712
713 // dioprintk((KERN_INFO MYNAM ": %s/%s: Creating new msg frame (send).\n",
714 // IOC_AND_NETDEV_NAMES_s_s(dev)));
715
716 pSendReq = (LANSendRequest_t *) mf;
717
718 /* Set the mac.raw pointer, since this apparently isn't getting
719 * done before we get the skb. Pull the data pointer past the mac data.
720 */
721 skb_reset_mac_header(skb);
722 skb_pull(skb, 12);
723
724 dma = dma_map_single(&mpt_dev->pcidev->dev, skb->data, skb->len,
725 DMA_TO_DEVICE);
726
727 priv->SendCtl[ctx].skb = skb;
728 priv->SendCtl[ctx].dma = dma;
729 priv->SendCtl[ctx].len = skb->len;
730
731 /* Message Header */
732 pSendReq->Reserved = 0;
733 pSendReq->Function = MPI_FUNCTION_LAN_SEND;
734 pSendReq->ChainOffset = 0;
735 pSendReq->Reserved2 = 0;
736 pSendReq->MsgFlags = 0;
737 pSendReq->PortNumber = priv->pnum;
738
739 /* Transaction Context Element */
740 pTrans = (SGETransaction32_t *) pSendReq->SG_List;
741
742 /* No Flags, 8 bytes of Details, 32bit Context (bloody turbo replies) */
743 pTrans->ContextSize = sizeof(u32);
744 pTrans->DetailsLength = 2 * sizeof(u32);
745 pTrans->Flags = 0;
746 pTrans->TransactionContext = cpu_to_le32(ctx);
747
748 // dioprintk((KERN_INFO MYNAM ": %s/%s: BC = %08x, skb = %p, buff = %p\n",
749 // IOC_AND_NETDEV_NAMES_s_s(dev),
750 // ctx, skb, skb->data));
751
752 mac = skb_mac_header(skb);
753
754 pTrans->TransactionDetails[0] = cpu_to_le32((cur_naa << 16) |
755 (mac[0] << 8) |
756 (mac[1] << 0));
757 pTrans->TransactionDetails[1] = cpu_to_le32((mac[2] << 24) |
758 (mac[3] << 16) |
759 (mac[4] << 8) |
760 (mac[5] << 0));
761
762 pSimple = (SGESimple64_t *) &pTrans->TransactionDetails[2];
763
764 /* If we ever decide to send more than one Simple SGE per LANSend, then
765 we will need to make sure that LAST_ELEMENT only gets set on the
766 last one. Otherwise, bad voodoo and evil funkiness will commence. */
767 pSimple->FlagsLength = cpu_to_le32(
768 ((MPI_SGE_FLAGS_LAST_ELEMENT |
769 MPI_SGE_FLAGS_END_OF_BUFFER |
770 MPI_SGE_FLAGS_SIMPLE_ELEMENT |
771 MPI_SGE_FLAGS_SYSTEM_ADDRESS |
772 MPI_SGE_FLAGS_HOST_TO_IOC |
773 MPI_SGE_FLAGS_64_BIT_ADDRESSING |
774 MPI_SGE_FLAGS_END_OF_LIST) << MPI_SGE_FLAGS_SHIFT) |
775 skb->len);
776 pSimple->Address.Low = cpu_to_le32((u32) dma);
777 if (sizeof(dma_addr_t) > sizeof(u32))
778 pSimple->Address.High = cpu_to_le32((u32) ((u64) dma >> 32));
779 else
780 pSimple->Address.High = 0;
781
782 mpt_put_msg_frame (LanCtx, mpt_dev, mf);
783 netif_trans_update(dev);
784
785 dioprintk((KERN_INFO MYNAM ": %s/%s: Sending packet. FlagsLength = %08x.\n",
786 IOC_AND_NETDEV_NAMES_s_s(dev),
787 le32_to_cpu(pSimple->FlagsLength)));
788
789 return NETDEV_TX_OK;
790 }
791
792 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
793 static void
mpt_lan_wake_post_buckets_task(struct net_device * dev,int priority)794 mpt_lan_wake_post_buckets_task(struct net_device *dev, int priority)
795 /*
796 * @priority: 0 = put it on the timer queue, 1 = put it on the immediate queue
797 */
798 {
799 struct mpt_lan_priv *priv = netdev_priv(dev);
800
801 if (test_and_set_bit(0, &priv->post_buckets_active) == 0) {
802 if (priority) {
803 schedule_delayed_work(&priv->post_buckets_task, 0);
804 } else {
805 schedule_delayed_work(&priv->post_buckets_task, 1);
806 dioprintk((KERN_INFO MYNAM ": post_buckets queued on "
807 "timer.\n"));
808 }
809 dioprintk((KERN_INFO MYNAM ": %s/%s: Queued post_buckets task.\n",
810 IOC_AND_NETDEV_NAMES_s_s(dev) ));
811 }
812 }
813
814 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
815 static int
mpt_lan_receive_skb(struct net_device * dev,struct sk_buff * skb)816 mpt_lan_receive_skb(struct net_device *dev, struct sk_buff *skb)
817 {
818 struct mpt_lan_priv *priv = netdev_priv(dev);
819
820 skb->protocol = mpt_lan_type_trans(skb, dev);
821
822 dioprintk((KERN_INFO MYNAM ": %s/%s: Incoming packet (%d bytes) "
823 "delivered to upper level.\n",
824 IOC_AND_NETDEV_NAMES_s_s(dev), skb->len));
825
826 dev->stats.rx_bytes += skb->len;
827 dev->stats.rx_packets++;
828
829 skb->dev = dev;
830 netif_rx(skb);
831
832 dioprintk((MYNAM "/receive_skb: %d buckets remaining\n",
833 atomic_read(&priv->buckets_out)));
834
835 if (atomic_read(&priv->buckets_out) < priv->bucketthresh)
836 mpt_lan_wake_post_buckets_task(dev, 1);
837
838 dioprintk((KERN_INFO MYNAM "/receive_post_reply: %d buckets "
839 "remaining, %d received back since sod\n",
840 atomic_read(&priv->buckets_out), priv->total_received));
841
842 return 0;
843 }
844
845 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
846 //static inline int
847 static int
mpt_lan_receive_post_turbo(struct net_device * dev,u32 tmsg)848 mpt_lan_receive_post_turbo(struct net_device *dev, u32 tmsg)
849 {
850 struct mpt_lan_priv *priv = netdev_priv(dev);
851 MPT_ADAPTER *mpt_dev = priv->mpt_dev;
852 struct sk_buff *skb, *old_skb;
853 unsigned long flags;
854 u32 ctx, len;
855
856 ctx = GET_LAN_BUCKET_CONTEXT(tmsg);
857 skb = priv->RcvCtl[ctx].skb;
858
859 len = GET_LAN_PACKET_LENGTH(tmsg);
860
861 if (len < MPT_LAN_RX_COPYBREAK) {
862 old_skb = skb;
863
864 skb = (struct sk_buff *)dev_alloc_skb(len);
865 if (!skb) {
866 printk (KERN_ERR MYNAM ": %s/%s: ERROR - Can't allocate skb! (%s@%d)\n",
867 IOC_AND_NETDEV_NAMES_s_s(dev),
868 __FILE__, __LINE__);
869 return -ENOMEM;
870 }
871
872 dma_sync_single_for_cpu(&mpt_dev->pcidev->dev,
873 priv->RcvCtl[ctx].dma,
874 priv->RcvCtl[ctx].len,
875 DMA_FROM_DEVICE);
876
877 skb_copy_from_linear_data(old_skb, skb_put(skb, len), len);
878
879 dma_sync_single_for_device(&mpt_dev->pcidev->dev,
880 priv->RcvCtl[ctx].dma,
881 priv->RcvCtl[ctx].len,
882 DMA_FROM_DEVICE);
883 goto out;
884 }
885
886 skb_put(skb, len);
887
888 priv->RcvCtl[ctx].skb = NULL;
889
890 dma_unmap_single(&mpt_dev->pcidev->dev, priv->RcvCtl[ctx].dma,
891 priv->RcvCtl[ctx].len, DMA_FROM_DEVICE);
892
893 out:
894 spin_lock_irqsave(&priv->rxfidx_lock, flags);
895 priv->mpt_rxfidx[++priv->mpt_rxfidx_tail] = ctx;
896 spin_unlock_irqrestore(&priv->rxfidx_lock, flags);
897
898 atomic_dec(&priv->buckets_out);
899 priv->total_received++;
900
901 return mpt_lan_receive_skb(dev, skb);
902 }
903
904 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
905 static int
mpt_lan_receive_post_free(struct net_device * dev,LANReceivePostReply_t * pRecvRep)906 mpt_lan_receive_post_free(struct net_device *dev,
907 LANReceivePostReply_t *pRecvRep)
908 {
909 struct mpt_lan_priv *priv = netdev_priv(dev);
910 MPT_ADAPTER *mpt_dev = priv->mpt_dev;
911 unsigned long flags;
912 struct sk_buff *skb;
913 u32 ctx;
914 int count;
915 int i;
916
917 count = pRecvRep->NumberOfContexts;
918
919 /**/ dlprintk((KERN_INFO MYNAM "/receive_post_reply: "
920 "IOC returned %d buckets, freeing them...\n", count));
921
922 spin_lock_irqsave(&priv->rxfidx_lock, flags);
923 for (i = 0; i < count; i++) {
924 ctx = le32_to_cpu(pRecvRep->BucketContext[i]);
925
926 skb = priv->RcvCtl[ctx].skb;
927
928 // dlprintk((KERN_INFO MYNAM ": %s: dev_name = %s\n",
929 // IOC_AND_NETDEV_NAMES_s_s(dev)));
930 // dlprintk((KERN_INFO MYNAM "@rpr[2], priv = %p, buckets_out addr = %p",
931 // priv, &(priv->buckets_out)));
932 // dlprintk((KERN_INFO MYNAM "@rpr[2] TC + 3\n"));
933
934 priv->RcvCtl[ctx].skb = NULL;
935 dma_unmap_single(&mpt_dev->pcidev->dev, priv->RcvCtl[ctx].dma,
936 priv->RcvCtl[ctx].len, DMA_FROM_DEVICE);
937 dev_kfree_skb_any(skb);
938
939 priv->mpt_rxfidx[++priv->mpt_rxfidx_tail] = ctx;
940 }
941 spin_unlock_irqrestore(&priv->rxfidx_lock, flags);
942
943 atomic_sub(count, &priv->buckets_out);
944
945 // for (i = 0; i < priv->max_buckets_out; i++)
946 // if (priv->RcvCtl[i].skb != NULL)
947 // dlprintk((KERN_INFO MYNAM "@rpr: bucket %03x "
948 // "is still out\n", i));
949
950 /* dlprintk((KERN_INFO MYNAM "/receive_post_reply: freed %d buckets\n",
951 count));
952 */
953 /**/ dlprintk((KERN_INFO MYNAM "@receive_post_reply: %d buckets "
954 /**/ "remaining, %d received back since sod.\n",
955 /**/ atomic_read(&priv->buckets_out), priv->total_received));
956 return 0;
957 }
958
959 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
960 static int
mpt_lan_receive_post_reply(struct net_device * dev,LANReceivePostReply_t * pRecvRep)961 mpt_lan_receive_post_reply(struct net_device *dev,
962 LANReceivePostReply_t *pRecvRep)
963 {
964 struct mpt_lan_priv *priv = netdev_priv(dev);
965 MPT_ADAPTER *mpt_dev = priv->mpt_dev;
966 struct sk_buff *skb, *old_skb;
967 unsigned long flags;
968 u32 len, ctx, offset;
969 u32 remaining = le32_to_cpu(pRecvRep->BucketsRemaining);
970 int count;
971 int i, l;
972
973 dioprintk((KERN_INFO MYNAM ": mpt_lan_receive_post_reply called\n"));
974 dioprintk((KERN_INFO MYNAM ": receive_post_reply: IOCStatus: %04x\n",
975 le16_to_cpu(pRecvRep->IOCStatus)));
976
977 if ((le16_to_cpu(pRecvRep->IOCStatus) & MPI_IOCSTATUS_MASK) ==
978 MPI_IOCSTATUS_LAN_CANCELED)
979 return mpt_lan_receive_post_free(dev, pRecvRep);
980
981 len = le32_to_cpu(pRecvRep->PacketLength);
982 if (len == 0) {
983 printk (KERN_ERR MYNAM ": %s/%s: ERROR - Got a non-TURBO "
984 "ReceivePostReply w/ PacketLength zero!\n",
985 IOC_AND_NETDEV_NAMES_s_s(dev));
986 printk (KERN_ERR MYNAM ": MsgFlags = %02x, IOCStatus = %04x\n",
987 pRecvRep->MsgFlags, le16_to_cpu(pRecvRep->IOCStatus));
988 return -1;
989 }
990
991 ctx = le32_to_cpu(pRecvRep->BucketContext[0]);
992 count = pRecvRep->NumberOfContexts;
993 skb = priv->RcvCtl[ctx].skb;
994
995 offset = le32_to_cpu(pRecvRep->PacketOffset);
996 // if (offset != 0) {
997 // printk (KERN_INFO MYNAM ": %s/%s: Got a ReceivePostReply "
998 // "w/ PacketOffset %u\n",
999 // IOC_AND_NETDEV_NAMES_s_s(dev),
1000 // offset);
1001 // }
1002
1003 dioprintk((KERN_INFO MYNAM ": %s/%s: @rpr, offset = %d, len = %d\n",
1004 IOC_AND_NETDEV_NAMES_s_s(dev),
1005 offset, len));
1006
1007 if (count > 1) {
1008 int szrem = len;
1009
1010 // dioprintk((KERN_INFO MYNAM ": %s/%s: Multiple buckets returned "
1011 // "for single packet, concatenating...\n",
1012 // IOC_AND_NETDEV_NAMES_s_s(dev)));
1013
1014 skb = (struct sk_buff *)dev_alloc_skb(len);
1015 if (!skb) {
1016 printk (KERN_ERR MYNAM ": %s/%s: ERROR - Can't allocate skb! (%s@%d)\n",
1017 IOC_AND_NETDEV_NAMES_s_s(dev),
1018 __FILE__, __LINE__);
1019 return -ENOMEM;
1020 }
1021
1022 spin_lock_irqsave(&priv->rxfidx_lock, flags);
1023 for (i = 0; i < count; i++) {
1024
1025 ctx = le32_to_cpu(pRecvRep->BucketContext[i]);
1026 old_skb = priv->RcvCtl[ctx].skb;
1027
1028 l = priv->RcvCtl[ctx].len;
1029 if (szrem < l)
1030 l = szrem;
1031
1032 // dioprintk((KERN_INFO MYNAM ": %s/%s: Buckets = %d, len = %u\n",
1033 // IOC_AND_NETDEV_NAMES_s_s(dev),
1034 // i, l));
1035
1036 dma_sync_single_for_cpu(&mpt_dev->pcidev->dev,
1037 priv->RcvCtl[ctx].dma,
1038 priv->RcvCtl[ctx].len,
1039 DMA_FROM_DEVICE);
1040 skb_copy_from_linear_data(old_skb, skb_put(skb, l), l);
1041
1042 dma_sync_single_for_device(&mpt_dev->pcidev->dev,
1043 priv->RcvCtl[ctx].dma,
1044 priv->RcvCtl[ctx].len,
1045 DMA_FROM_DEVICE);
1046
1047 priv->mpt_rxfidx[++priv->mpt_rxfidx_tail] = ctx;
1048 szrem -= l;
1049 }
1050 spin_unlock_irqrestore(&priv->rxfidx_lock, flags);
1051
1052 } else if (len < MPT_LAN_RX_COPYBREAK) {
1053
1054 old_skb = skb;
1055
1056 skb = (struct sk_buff *)dev_alloc_skb(len);
1057 if (!skb) {
1058 printk (KERN_ERR MYNAM ": %s/%s: ERROR - Can't allocate skb! (%s@%d)\n",
1059 IOC_AND_NETDEV_NAMES_s_s(dev),
1060 __FILE__, __LINE__);
1061 return -ENOMEM;
1062 }
1063
1064 dma_sync_single_for_cpu(&mpt_dev->pcidev->dev,
1065 priv->RcvCtl[ctx].dma,
1066 priv->RcvCtl[ctx].len,
1067 DMA_FROM_DEVICE);
1068
1069 skb_copy_from_linear_data(old_skb, skb_put(skb, len), len);
1070
1071 dma_sync_single_for_device(&mpt_dev->pcidev->dev,
1072 priv->RcvCtl[ctx].dma,
1073 priv->RcvCtl[ctx].len,
1074 DMA_FROM_DEVICE);
1075
1076 spin_lock_irqsave(&priv->rxfidx_lock, flags);
1077 priv->mpt_rxfidx[++priv->mpt_rxfidx_tail] = ctx;
1078 spin_unlock_irqrestore(&priv->rxfidx_lock, flags);
1079
1080 } else {
1081 spin_lock_irqsave(&priv->rxfidx_lock, flags);
1082
1083 priv->RcvCtl[ctx].skb = NULL;
1084
1085 dma_unmap_single(&mpt_dev->pcidev->dev, priv->RcvCtl[ctx].dma,
1086 priv->RcvCtl[ctx].len, DMA_FROM_DEVICE);
1087 priv->RcvCtl[ctx].dma = 0;
1088
1089 priv->mpt_rxfidx[++priv->mpt_rxfidx_tail] = ctx;
1090 spin_unlock_irqrestore(&priv->rxfidx_lock, flags);
1091
1092 skb_put(skb,len);
1093 }
1094
1095 atomic_sub(count, &priv->buckets_out);
1096 priv->total_received += count;
1097
1098 if (priv->mpt_rxfidx_tail >= MPT_LAN_MAX_BUCKETS_OUT) {
1099 printk (KERN_ERR MYNAM ": %s/%s: Yoohoo! mpt_rxfidx_tail = %d, "
1100 "MPT_LAN_MAX_BUCKETS_OUT = %d\n",
1101 IOC_AND_NETDEV_NAMES_s_s(dev),
1102 priv->mpt_rxfidx_tail,
1103 MPT_LAN_MAX_BUCKETS_OUT);
1104
1105 return -1;
1106 }
1107
1108 if (remaining == 0)
1109 printk (KERN_WARNING MYNAM ": %s/%s: WARNING - IOC out of buckets! "
1110 "(priv->buckets_out = %d)\n",
1111 IOC_AND_NETDEV_NAMES_s_s(dev),
1112 atomic_read(&priv->buckets_out));
1113 else if (remaining < 10)
1114 printk (KERN_INFO MYNAM ": %s/%s: IOC says %d buckets left. "
1115 "(priv->buckets_out = %d)\n",
1116 IOC_AND_NETDEV_NAMES_s_s(dev),
1117 remaining, atomic_read(&priv->buckets_out));
1118
1119 if ((remaining < priv->bucketthresh) &&
1120 ((atomic_read(&priv->buckets_out) - remaining) >
1121 MPT_LAN_BUCKETS_REMAIN_MISMATCH_THRESH)) {
1122
1123 printk (KERN_WARNING MYNAM " Mismatch between driver's "
1124 "buckets_out count and fw's BucketsRemaining "
1125 "count has crossed the threshold, issuing a "
1126 "LanReset to clear the fw's hashtable. You may "
1127 "want to check your /var/log/messages for \"CRC "
1128 "error\" event notifications.\n");
1129
1130 mpt_lan_reset(dev);
1131 mpt_lan_wake_post_buckets_task(dev, 0);
1132 }
1133
1134 return mpt_lan_receive_skb(dev, skb);
1135 }
1136
1137 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
1138 /* Simple SGE's only at the moment */
1139
1140 static void
mpt_lan_post_receive_buckets(struct mpt_lan_priv * priv)1141 mpt_lan_post_receive_buckets(struct mpt_lan_priv *priv)
1142 {
1143 struct net_device *dev = priv->dev;
1144 MPT_ADAPTER *mpt_dev = priv->mpt_dev;
1145 MPT_FRAME_HDR *mf;
1146 LANReceivePostRequest_t *pRecvReq;
1147 SGETransaction32_t *pTrans;
1148 SGESimple64_t *pSimple;
1149 struct sk_buff *skb;
1150 dma_addr_t dma;
1151 u32 curr, buckets, count, max;
1152 u32 len = (dev->mtu + dev->hard_header_len + 4);
1153 unsigned long flags;
1154 int i;
1155
1156 curr = atomic_read(&priv->buckets_out);
1157 buckets = (priv->max_buckets_out - curr);
1158
1159 dioprintk((KERN_INFO MYNAM ": %s/%s: @%s, Start_buckets = %u, buckets_out = %u\n",
1160 IOC_AND_NETDEV_NAMES_s_s(dev),
1161 __func__, buckets, curr));
1162
1163 max = (mpt_dev->req_sz - MPT_LAN_RECEIVE_POST_REQUEST_SIZE) /
1164 (sizeof(SGETransaction32_t) + sizeof(SGESimple64_t));
1165
1166 while (buckets) {
1167 mf = mpt_get_msg_frame(LanCtx, mpt_dev);
1168 if (mf == NULL) {
1169 printk (KERN_ERR "%s: Unable to alloc request frame\n",
1170 __func__);
1171 dioprintk((KERN_ERR "%s: %u buckets remaining\n",
1172 __func__, buckets));
1173 goto out;
1174 }
1175 pRecvReq = (LANReceivePostRequest_t *) mf;
1176
1177 i = le16_to_cpu(mf->u.frame.hwhdr.msgctxu.fld.req_idx);
1178 mpt_dev->RequestNB[i] = 0;
1179 count = buckets;
1180 if (count > max)
1181 count = max;
1182
1183 pRecvReq->Function = MPI_FUNCTION_LAN_RECEIVE;
1184 pRecvReq->ChainOffset = 0;
1185 pRecvReq->MsgFlags = 0;
1186 pRecvReq->PortNumber = priv->pnum;
1187
1188 pTrans = (SGETransaction32_t *) pRecvReq->SG_List;
1189 pSimple = NULL;
1190
1191 for (i = 0; i < count; i++) {
1192 int ctx;
1193
1194 spin_lock_irqsave(&priv->rxfidx_lock, flags);
1195 if (priv->mpt_rxfidx_tail < 0) {
1196 printk (KERN_ERR "%s: Can't alloc context\n",
1197 __func__);
1198 spin_unlock_irqrestore(&priv->rxfidx_lock,
1199 flags);
1200 break;
1201 }
1202
1203 ctx = priv->mpt_rxfidx[priv->mpt_rxfidx_tail--];
1204
1205 skb = priv->RcvCtl[ctx].skb;
1206 if (skb && (priv->RcvCtl[ctx].len != len)) {
1207 dma_unmap_single(&mpt_dev->pcidev->dev,
1208 priv->RcvCtl[ctx].dma,
1209 priv->RcvCtl[ctx].len,
1210 DMA_FROM_DEVICE);
1211 dev_kfree_skb(priv->RcvCtl[ctx].skb);
1212 skb = priv->RcvCtl[ctx].skb = NULL;
1213 }
1214
1215 if (skb == NULL) {
1216 skb = dev_alloc_skb(len);
1217 if (skb == NULL) {
1218 printk (KERN_WARNING
1219 MYNAM "/%s: Can't alloc skb\n",
1220 __func__);
1221 priv->mpt_rxfidx[++priv->mpt_rxfidx_tail] = ctx;
1222 spin_unlock_irqrestore(&priv->rxfidx_lock, flags);
1223 break;
1224 }
1225
1226 dma = dma_map_single(&mpt_dev->pcidev->dev,
1227 skb->data, len,
1228 DMA_FROM_DEVICE);
1229
1230 priv->RcvCtl[ctx].skb = skb;
1231 priv->RcvCtl[ctx].dma = dma;
1232 priv->RcvCtl[ctx].len = len;
1233 }
1234
1235 spin_unlock_irqrestore(&priv->rxfidx_lock, flags);
1236
1237 pTrans->ContextSize = sizeof(u32);
1238 pTrans->DetailsLength = 0;
1239 pTrans->Flags = 0;
1240 pTrans->TransactionContext = cpu_to_le32(ctx);
1241
1242 pSimple = (SGESimple64_t *) pTrans->TransactionDetails;
1243
1244 pSimple->FlagsLength = cpu_to_le32(
1245 ((MPI_SGE_FLAGS_END_OF_BUFFER |
1246 MPI_SGE_FLAGS_SIMPLE_ELEMENT |
1247 MPI_SGE_FLAGS_64_BIT_ADDRESSING) << MPI_SGE_FLAGS_SHIFT) | len);
1248 pSimple->Address.Low = cpu_to_le32((u32) priv->RcvCtl[ctx].dma);
1249 if (sizeof(dma_addr_t) > sizeof(u32))
1250 pSimple->Address.High = cpu_to_le32((u32) ((u64) priv->RcvCtl[ctx].dma >> 32));
1251 else
1252 pSimple->Address.High = 0;
1253
1254 pTrans = (SGETransaction32_t *) (pSimple + 1);
1255 }
1256
1257 if (pSimple == NULL) {
1258 /**/ printk (KERN_WARNING MYNAM "/%s: No buckets posted\n",
1259 /**/ __func__);
1260 mpt_free_msg_frame(mpt_dev, mf);
1261 goto out;
1262 }
1263
1264 pSimple->FlagsLength |= cpu_to_le32(MPI_SGE_FLAGS_END_OF_LIST << MPI_SGE_FLAGS_SHIFT);
1265
1266 pRecvReq->BucketCount = cpu_to_le32(i);
1267
1268 /* printk(KERN_INFO MYNAM ": posting buckets\n ");
1269 * for (i = 0; i < j + 2; i ++)
1270 * printk (" %08x", le32_to_cpu(msg[i]));
1271 * printk ("\n");
1272 */
1273
1274 mpt_put_msg_frame(LanCtx, mpt_dev, mf);
1275
1276 priv->total_posted += i;
1277 buckets -= i;
1278 atomic_add(i, &priv->buckets_out);
1279 }
1280
1281 out:
1282 dioprintk((KERN_INFO MYNAM "/%s: End_buckets = %u, priv->buckets_out = %u\n",
1283 __func__, buckets, atomic_read(&priv->buckets_out)));
1284 dioprintk((KERN_INFO MYNAM "/%s: Posted %u buckets and received %u back\n",
1285 __func__, priv->total_posted, priv->total_received));
1286
1287 clear_bit(0, &priv->post_buckets_active);
1288 }
1289
1290 static void
mpt_lan_post_receive_buckets_work(struct work_struct * work)1291 mpt_lan_post_receive_buckets_work(struct work_struct *work)
1292 {
1293 mpt_lan_post_receive_buckets(container_of(work, struct mpt_lan_priv,
1294 post_buckets_task.work));
1295 }
1296
1297 static const struct net_device_ops mpt_netdev_ops = {
1298 .ndo_open = mpt_lan_open,
1299 .ndo_stop = mpt_lan_close,
1300 .ndo_start_xmit = mpt_lan_sdu_send,
1301 .ndo_tx_timeout = mpt_lan_tx_timeout,
1302 };
1303
1304 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
1305 static struct net_device *
mpt_register_lan_device(MPT_ADAPTER * mpt_dev,int pnum)1306 mpt_register_lan_device (MPT_ADAPTER *mpt_dev, int pnum)
1307 {
1308 struct net_device *dev;
1309 struct mpt_lan_priv *priv;
1310 u8 HWaddr[FC_ALEN], *a;
1311
1312 dev = alloc_fcdev(sizeof(struct mpt_lan_priv));
1313 if (!dev)
1314 return NULL;
1315
1316 dev->mtu = MPT_LAN_MTU;
1317
1318 priv = netdev_priv(dev);
1319
1320 priv->dev = dev;
1321 priv->mpt_dev = mpt_dev;
1322 priv->pnum = pnum;
1323
1324 INIT_DELAYED_WORK(&priv->post_buckets_task,
1325 mpt_lan_post_receive_buckets_work);
1326 priv->post_buckets_active = 0;
1327
1328 dlprintk((KERN_INFO MYNAM "@%d: bucketlen = %d\n",
1329 __LINE__, dev->mtu + dev->hard_header_len + 4));
1330
1331 atomic_set(&priv->buckets_out, 0);
1332 priv->total_posted = 0;
1333 priv->total_received = 0;
1334 priv->max_buckets_out = max_buckets_out;
1335 if (mpt_dev->pfacts[0].MaxLanBuckets < max_buckets_out)
1336 priv->max_buckets_out = mpt_dev->pfacts[0].MaxLanBuckets;
1337
1338 dlprintk((KERN_INFO MYNAM "@%d: MaxLanBuckets=%d, max_buckets_out/priv=%d/%d\n",
1339 __LINE__,
1340 mpt_dev->pfacts[0].MaxLanBuckets,
1341 max_buckets_out,
1342 priv->max_buckets_out));
1343
1344 priv->bucketthresh = priv->max_buckets_out * 2 / 3;
1345 spin_lock_init(&priv->txfidx_lock);
1346 spin_lock_init(&priv->rxfidx_lock);
1347
1348 /* Grab pre-fetched LANPage1 stuff. :-) */
1349 a = (u8 *) &mpt_dev->lan_cnfg_page1.HardwareAddressLow;
1350
1351 HWaddr[0] = a[5];
1352 HWaddr[1] = a[4];
1353 HWaddr[2] = a[3];
1354 HWaddr[3] = a[2];
1355 HWaddr[4] = a[1];
1356 HWaddr[5] = a[0];
1357
1358 dev->addr_len = FC_ALEN;
1359 dev_addr_set(dev, HWaddr);
1360 memset(dev->broadcast, 0xff, FC_ALEN);
1361
1362 /* The Tx queue is 127 deep on the 909.
1363 * Give ourselves some breathing room.
1364 */
1365 priv->tx_max_out = (tx_max_out_p <= MPT_TX_MAX_OUT_LIM) ?
1366 tx_max_out_p : MPT_TX_MAX_OUT_LIM;
1367
1368 dev->netdev_ops = &mpt_netdev_ops;
1369 dev->watchdog_timeo = MPT_LAN_TX_TIMEOUT;
1370
1371 /* MTU range: 96 - 65280 */
1372 dev->min_mtu = MPT_LAN_MIN_MTU;
1373 dev->max_mtu = MPT_LAN_MAX_MTU;
1374
1375 dlprintk((KERN_INFO MYNAM ": Finished registering dev "
1376 "and setting initial values\n"));
1377
1378 if (register_netdev(dev) != 0) {
1379 free_netdev(dev);
1380 dev = NULL;
1381 }
1382 return dev;
1383 }
1384
1385 static int
mptlan_probe(struct pci_dev * pdev)1386 mptlan_probe(struct pci_dev *pdev)
1387 {
1388 MPT_ADAPTER *ioc = pci_get_drvdata(pdev);
1389 struct net_device *dev;
1390 int i;
1391
1392 for (i = 0; i < ioc->facts.NumberOfPorts; i++) {
1393 printk(KERN_INFO MYNAM ": %s: PortNum=%x, "
1394 "ProtocolFlags=%02Xh (%c%c%c%c)\n",
1395 ioc->name, ioc->pfacts[i].PortNumber,
1396 ioc->pfacts[i].ProtocolFlags,
1397 MPT_PROTOCOL_FLAGS_c_c_c_c(
1398 ioc->pfacts[i].ProtocolFlags));
1399
1400 if (!(ioc->pfacts[i].ProtocolFlags &
1401 MPI_PORTFACTS_PROTOCOL_LAN)) {
1402 printk(KERN_INFO MYNAM ": %s: Hmmm... LAN protocol "
1403 "seems to be disabled on this adapter port!\n",
1404 ioc->name);
1405 continue;
1406 }
1407
1408 dev = mpt_register_lan_device(ioc, i);
1409 if (!dev) {
1410 printk(KERN_ERR MYNAM ": %s: Unable to register "
1411 "port%d as a LAN device\n", ioc->name,
1412 ioc->pfacts[i].PortNumber);
1413 continue;
1414 }
1415
1416 printk(KERN_INFO MYNAM ": %s: Fusion MPT LAN device "
1417 "registered as '%s'\n", ioc->name, dev->name);
1418 printk(KERN_INFO MYNAM ": %s/%s: "
1419 "LanAddr = %pM\n",
1420 IOC_AND_NETDEV_NAMES_s_s(dev),
1421 dev->dev_addr);
1422
1423 ioc->netdev = dev;
1424
1425 return 0;
1426 }
1427
1428 return -ENODEV;
1429 }
1430
1431 static void
mptlan_remove(struct pci_dev * pdev)1432 mptlan_remove(struct pci_dev *pdev)
1433 {
1434 MPT_ADAPTER *ioc = pci_get_drvdata(pdev);
1435 struct net_device *dev = ioc->netdev;
1436 struct mpt_lan_priv *priv = netdev_priv(dev);
1437
1438 cancel_delayed_work_sync(&priv->post_buckets_task);
1439 if(dev != NULL) {
1440 unregister_netdev(dev);
1441 free_netdev(dev);
1442 }
1443 }
1444
1445 static struct mpt_pci_driver mptlan_driver = {
1446 .probe = mptlan_probe,
1447 .remove = mptlan_remove,
1448 };
1449
mpt_lan_init(void)1450 static int __init mpt_lan_init (void)
1451 {
1452 show_mptmod_ver(LANAME, LANVER);
1453
1454 LanCtx = mpt_register(lan_reply, MPTLAN_DRIVER,
1455 "lan_reply");
1456 if (LanCtx <= 0) {
1457 printk (KERN_ERR MYNAM ": Failed to register with MPT base driver\n");
1458 return -EBUSY;
1459 }
1460
1461 dlprintk((KERN_INFO MYNAM ": assigned context of %d\n", LanCtx));
1462
1463 if (mpt_reset_register(LanCtx, mpt_lan_ioc_reset)) {
1464 printk(KERN_ERR MYNAM ": Eieee! unable to register a reset "
1465 "handler with mptbase! The world is at an end! "
1466 "Everything is fading to black! Goodbye.\n");
1467 return -EBUSY;
1468 }
1469
1470 dlprintk((KERN_INFO MYNAM ": Registered for IOC reset notifications\n"));
1471
1472 mpt_device_driver_register(&mptlan_driver, MPTLAN_DRIVER);
1473 return 0;
1474 }
1475
mpt_lan_exit(void)1476 static void __exit mpt_lan_exit(void)
1477 {
1478 mpt_device_driver_deregister(MPTLAN_DRIVER);
1479 mpt_reset_deregister(LanCtx);
1480
1481 if (LanCtx) {
1482 mpt_deregister(LanCtx);
1483 LanCtx = MPT_MAX_PROTOCOL_DRIVERS;
1484 }
1485 }
1486
1487 module_init(mpt_lan_init);
1488 module_exit(mpt_lan_exit);
1489
1490 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
1491 static unsigned short
mpt_lan_type_trans(struct sk_buff * skb,struct net_device * dev)1492 mpt_lan_type_trans(struct sk_buff *skb, struct net_device *dev)
1493 {
1494 struct mpt_lan_ohdr *fch = (struct mpt_lan_ohdr *)skb->data;
1495 struct fcllc *fcllc;
1496
1497 skb_reset_mac_header(skb);
1498 skb_pull(skb, sizeof(struct mpt_lan_ohdr));
1499
1500 if (fch->dtype == htons(0xffff)) {
1501 u32 *p = (u32 *) fch;
1502
1503 swab32s(p + 0);
1504 swab32s(p + 1);
1505 swab32s(p + 2);
1506 swab32s(p + 3);
1507
1508 printk (KERN_WARNING MYNAM ": %s: WARNING - Broadcast swap F/W bug detected!\n",
1509 NETDEV_PTR_TO_IOC_NAME_s(dev));
1510 printk (KERN_WARNING MYNAM ": Please update sender @ MAC_addr = %pM\n",
1511 fch->saddr);
1512 }
1513
1514 if (*fch->daddr & 1) {
1515 if (!memcmp(fch->daddr, dev->broadcast, FC_ALEN)) {
1516 skb->pkt_type = PACKET_BROADCAST;
1517 } else {
1518 skb->pkt_type = PACKET_MULTICAST;
1519 }
1520 } else {
1521 if (memcmp(fch->daddr, dev->dev_addr, FC_ALEN)) {
1522 skb->pkt_type = PACKET_OTHERHOST;
1523 } else {
1524 skb->pkt_type = PACKET_HOST;
1525 }
1526 }
1527
1528 fcllc = (struct fcllc *)skb->data;
1529
1530 /* Strip the SNAP header from ARP packets since we don't
1531 * pass them through to the 802.2/SNAP layers.
1532 */
1533 if (fcllc->dsap == EXTENDED_SAP &&
1534 (fcllc->ethertype == htons(ETH_P_IP) ||
1535 fcllc->ethertype == htons(ETH_P_ARP))) {
1536 skb_pull(skb, sizeof(struct fcllc));
1537 return fcllc->ethertype;
1538 }
1539
1540 return htons(ETH_P_802_2);
1541 }
1542
1543 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
1544