File: /usr/src/linux/drivers/i2o/i2o_lan.c
1 /*
2 * drivers/i2o/i2o_lan.c
3 *
4 * I2O LAN CLASS OSM May 26th 2000
5 *
6 * (C) Copyright 1999, 2000 University of Helsinki,
7 * Department of Computer Science
8 *
9 * This code is still under development / test.
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
15 *
16 * Authors: Auvo Häkkinen <Auvo.Hakkinen@cs.Helsinki.FI>
17 * Fixes: Juha Sievänen <Juha.Sievanen@cs.Helsinki.FI>
18 * Taneli Vähäkangas <Taneli.Vahakangas@cs.Helsinki.FI>
19 * Deepak Saxena <deepak@plexity.net>
20 *
21 * Tested: in FDDI environment (using SysKonnect's DDM)
22 * in Gigabit Eth environment (using SysKonnect's DDM)
23 * in Fast Ethernet environment (using Intel 82558 DDM)
24 *
25 * TODO: tests for other LAN classes (Token Ring, Fibre Channel)
26 */
27
28 #include <linux/config.h>
29 #include <linux/module.h>
30
31 #include <linux/pci.h>
32
33 #include <linux/netdevice.h>
34 #include <linux/etherdevice.h>
35 #include <linux/fddidevice.h>
36 #include <linux/trdevice.h>
37 #include <linux/fcdevice.h>
38
39 #include <linux/skbuff.h>
40 #include <linux/if_arp.h>
41 #include <linux/slab.h>
42 #include <linux/init.h>
43 #include <linux/spinlock.h>
44 #include <linux/tqueue.h>
45 #include <asm/io.h>
46
47 #include <linux/errno.h>
48
49 #include <linux/i2o.h>
50 #include "i2o_lan.h"
51
52 //#define DRIVERDEBUG
53 #ifdef DRIVERDEBUG
54 #define dprintk(s, args...) printk(s, ## args)
55 #else
56 #define dprintk(s, args...)
57 #endif
58
59 /* The following module parameters are used as default values
60 * for per interface values located in the net_device private area.
61 * Private values are changed via /proc filesystem.
62 */
63 static u32 max_buckets_out = I2O_LAN_MAX_BUCKETS_OUT;
64 static u32 bucket_thresh = I2O_LAN_BUCKET_THRESH;
65 static u32 rx_copybreak = I2O_LAN_RX_COPYBREAK;
66 static u8 tx_batch_mode = I2O_LAN_TX_BATCH_MODE;
67 static u32 i2o_event_mask = I2O_LAN_EVENT_MASK;
68
69 #define MAX_LAN_CARDS 16
70 static struct net_device *i2o_landevs[MAX_LAN_CARDS+1];
71 static int unit = -1; /* device unit number */
72
73 static void i2o_lan_reply(struct i2o_handler *h, struct i2o_controller *iop, struct i2o_message *m);
74 static void i2o_lan_send_post_reply(struct i2o_handler *h, struct i2o_controller *iop, struct i2o_message *m);
75 static int i2o_lan_receive_post(struct net_device *dev);
76 static void i2o_lan_receive_post_reply(struct i2o_handler *h, struct i2o_controller *iop, struct i2o_message *m);
77 static void i2o_lan_release_buckets(struct net_device *dev, u32 *msg);
78
79 static int i2o_lan_reset(struct net_device *dev);
80 static void i2o_lan_handle_event(struct net_device *dev, u32 *msg);
81
82 /* Structures to register handlers for the incoming replies. */
83
84 static struct i2o_handler i2o_lan_send_handler = {
85 i2o_lan_send_post_reply, // For send replies
86 NULL,
87 NULL,
88 NULL,
89 "I2O LAN OSM send",
90 -1,
91 I2O_CLASS_LAN
92 };
93 static int lan_send_context;
94
95 static struct i2o_handler i2o_lan_receive_handler = {
96 i2o_lan_receive_post_reply, // For receive replies
97 NULL,
98 NULL,
99 NULL,
100 "I2O LAN OSM receive",
101 -1,
102 I2O_CLASS_LAN
103 };
104 static int lan_receive_context;
105
106 static struct i2o_handler i2o_lan_handler = {
107 i2o_lan_reply, // For other replies
108 NULL,
109 NULL,
110 NULL,
111 "I2O LAN OSM",
112 -1,
113 I2O_CLASS_LAN
114 };
115 static int lan_context;
116
117 DECLARE_TASK_QUEUE(i2o_post_buckets_task);
118 struct tq_struct run_i2o_post_buckets_task = {
119 routine: (void (*)(void *)) run_task_queue,
120 data: (void *) 0
121 };
122
123 /* Functions to handle message failures and transaction errors:
124 ==============================================================*/
125
126 /*
127 * i2o_lan_handle_failure(): Fail bit has been set since IOP's message
128 * layer cannot deliver the request to the target, or the target cannot
129 * process the request.
130 */
131 static void i2o_lan_handle_failure(struct net_device *dev, u32 *msg)
132 {
133 struct i2o_lan_local *priv = (struct i2o_lan_local *)dev->priv;
134 struct i2o_device *i2o_dev = priv->i2o_dev;
135 struct i2o_controller *iop = i2o_dev->controller;
136
137 u32 *preserved_msg = (u32*)(iop->mem_offset + msg[7]);
138 u32 *sgl_elem = &preserved_msg[4];
139 struct sk_buff *skb = NULL;
140 u8 le_flag;
141
142 i2o_report_status(KERN_INFO, dev->name, msg);
143
144 /* If PacketSend failed, free sk_buffs reserved by upper layers */
145
146 if (msg[1] >> 24 == LAN_PACKET_SEND) {
147 do {
148 skb = (struct sk_buff *)(sgl_elem[1]);
149 dev_kfree_skb_irq(skb);
150
151 atomic_dec(&priv->tx_out);
152
153 le_flag = *sgl_elem >> 31;
154 sgl_elem +=3;
155 } while (le_flag == 0); /* Last element flag not set */
156
157 if (netif_queue_stopped(dev))
158 netif_wake_queue(dev);
159 }
160
161 /* If ReceivePost failed, free sk_buffs we have reserved */
162
163 if (msg[1] >> 24 == LAN_RECEIVE_POST) {
164 do {
165 skb = (struct sk_buff *)(sgl_elem[1]);
166 dev_kfree_skb_irq(skb);
167
168 atomic_dec(&priv->buckets_out);
169
170 le_flag = *sgl_elem >> 31;
171 sgl_elem +=3;
172 } while (le_flag == 0); /* Last element flag not set */
173 }
174
175 /* Release the preserved msg frame by resubmitting it as a NOP */
176
177 preserved_msg[0] = THREE_WORD_MSG_SIZE | SGL_OFFSET_0;
178 preserved_msg[1] = I2O_CMD_UTIL_NOP << 24 | HOST_TID << 12 | 0;
179 preserved_msg[2] = 0;
180 i2o_post_message(iop, msg[7]);
181 }
182 /*
183 * i2o_lan_handle_transaction_error(): IOP or DDM has rejected the request
184 * for general cause (format error, bad function code, insufficient resources,
185 * etc.). We get one transaction_error for each failed transaction.
186 */
187 static void i2o_lan_handle_transaction_error(struct net_device *dev, u32 *msg)
188 {
189 struct i2o_lan_local *priv = (struct i2o_lan_local *)dev->priv;
190 struct sk_buff *skb;
191
192 i2o_report_status(KERN_INFO, dev->name, msg);
193
194 /* If PacketSend was rejected, free sk_buff reserved by upper layers */
195
196 if (msg[1] >> 24 == LAN_PACKET_SEND) {
197 skb = (struct sk_buff *)(msg[3]); // TransactionContext
198 dev_kfree_skb_irq(skb);
199 atomic_dec(&priv->tx_out);
200
201 if (netif_queue_stopped(dev))
202 netif_wake_queue(dev);
203 }
204
205 /* If ReceivePost was rejected, free sk_buff we have reserved */
206
207 if (msg[1] >> 24 == LAN_RECEIVE_POST) {
208 skb = (struct sk_buff *)(msg[3]);
209 dev_kfree_skb_irq(skb);
210 atomic_dec(&priv->buckets_out);
211 }
212 }
213
214 /*
215 * i2o_lan_handle_status(): Common parts of handling a not succeeded request
216 * (status != SUCCESS).
217 */
218 static int i2o_lan_handle_status(struct net_device *dev, u32 *msg)
219 {
220 /* Fail bit set? */
221
222 if (msg[0] & MSG_FAIL) {
223 i2o_lan_handle_failure(dev, msg);
224 return -1;
225 }
226
227 /* Message rejected for general cause? */
228
229 if ((msg[4]>>24) == I2O_REPLY_STATUS_TRANSACTION_ERROR) {
230 i2o_lan_handle_transaction_error(dev, msg);
231 return -1;
232 }
233
234 /* Else have to handle it in the callback function */
235
236 return 0;
237 }
238
239 /* Callback functions called from the interrupt routine:
240 =======================================================*/
241
242 /*
243 * i2o_lan_send_post_reply(): Callback function to handle PostSend replies.
244 */
245 static void i2o_lan_send_post_reply(struct i2o_handler *h,
246 struct i2o_controller *iop, struct i2o_message *m)
247 {
248 u32 *msg = (u32 *)m;
249 u8 unit = (u8)(msg[2]>>16); // InitiatorContext
250 struct net_device *dev = i2o_landevs[unit];
251 struct i2o_lan_local *priv = (struct i2o_lan_local *)dev->priv;
252 u8 trl_count = msg[3] & 0x000000FF;
253
254 if ((msg[4] >> 24) != I2O_REPLY_STATUS_SUCCESS) {
255 if (i2o_lan_handle_status(dev, msg))
256 return;
257 }
258
259 #ifdef DRIVERDEBUG
260 i2o_report_status(KERN_INFO, dev->name, msg);
261 #endif
262
263 /* DDM has handled transmit request(s), free sk_buffs.
264 * We get similar single transaction reply also in error cases
265 * (except if msg failure or transaction error).
266 */
267 while (trl_count) {
268 dev_kfree_skb_irq((struct sk_buff *)msg[4 + trl_count]);
269 dprintk(KERN_INFO "%s: tx skb freed (trl_count=%d).\n",
270 dev->name, trl_count);
271 atomic_dec(&priv->tx_out);
272 trl_count--;
273 }
274
275 /* If priv->tx_out had reached tx_max_out, the queue was stopped */
276
277 if (netif_queue_stopped(dev))
278 netif_wake_queue(dev);
279 }
280
281 /*
282 * i2o_lan_receive_post_reply(): Callback function to process incoming packets.
283 */
284 static void i2o_lan_receive_post_reply(struct i2o_handler *h,
285 struct i2o_controller *iop, struct i2o_message *m)
286 {
287 u32 *msg = (u32 *)m;
288 u8 unit = (u8)(msg[2]>>16); // InitiatorContext
289 struct net_device *dev = i2o_landevs[unit];
290
291 struct i2o_lan_local *priv = (struct i2o_lan_local *)dev->priv;
292 struct i2o_bucket_descriptor *bucket = (struct i2o_bucket_descriptor *)&msg[6];
293 struct i2o_packet_info *packet;
294 u8 trl_count = msg[3] & 0x000000FF;
295 struct sk_buff *skb, *old_skb;
296 unsigned long flags = 0;
297
298 if ((msg[4] >> 24) != I2O_REPLY_STATUS_SUCCESS) {
299 if (i2o_lan_handle_status(dev, msg))
300 return;
301
302 i2o_lan_release_buckets(dev, msg);
303 return;
304 }
305
306 #ifdef DRIVERDEBUG
307 i2o_report_status(KERN_INFO, dev->name, msg);
308 #endif
309
310 /* Else we are receiving incoming post. */
311
312 while (trl_count--) {
313 skb = (struct sk_buff *)bucket->context;
314 packet = (struct i2o_packet_info *)bucket->packet_info;
315 atomic_dec(&priv->buckets_out);
316
317 /* Sanity checks: Any weird characteristics in bucket? */
318
319 if (packet->flags & 0x0f || ! packet->flags & 0x40) {
320 if (packet->flags & 0x01)
321 printk(KERN_WARNING "%s: packet with errors, error code=0x%02x.\n",
322 dev->name, packet->status & 0xff);
323
324 /* The following shouldn't happen, unless parameters in
325 * LAN_OPERATION group are changed during the run time.
326 */
327 if (packet->flags & 0x0c)
328 printk(KERN_DEBUG "%s: multi-bucket packets not supported!\n",
329 dev->name);
330
331 if (! packet->flags & 0x40)
332 printk(KERN_DEBUG "%s: multiple packets in a bucket not supported!\n",
333 dev->name);
334
335 dev_kfree_skb_irq(skb);
336
337 bucket++;
338 continue;
339 }
340
341 /* Copy short packet to a new skb */
342
343 if (packet->len < priv->rx_copybreak) {
344 old_skb = skb;
345 skb = (struct sk_buff *)dev_alloc_skb(packet->len+2);
346 if (skb == NULL) {
347 printk(KERN_ERR "%s: Can't allocate skb.\n", dev->name);
348 return;
349 }
350 skb_reserve(skb, 2);
351 memcpy(skb_put(skb, packet->len), old_skb->data, packet->len);
352
353 spin_lock_irqsave(&priv->fbl_lock, flags);
354 if (priv->i2o_fbl_tail < I2O_LAN_MAX_BUCKETS_OUT)
355 priv->i2o_fbl[++priv->i2o_fbl_tail] = old_skb;
356 else
357 dev_kfree_skb_irq(old_skb);
358
359 spin_unlock_irqrestore(&priv->fbl_lock, flags);
360 } else
361 skb_put(skb, packet->len);
362
363 /* Deliver to upper layers */
364
365 skb->dev = dev;
366 skb->protocol = priv->type_trans(skb, dev);
367 netif_rx(skb);
368
369 dev->last_rx = jiffies;
370
371 dprintk(KERN_INFO "%s: Incoming packet (%d bytes) delivered "
372 "to upper level.\n", dev->name, packet->len);
373
374 bucket++; // to next Packet Descriptor Block
375 }
376
377 #ifdef DRIVERDEBUG
378 if (msg[5] == 0)
379 printk(KERN_INFO "%s: DDM out of buckets (priv->count = %d)!\n",
380 dev->name, atomic_read(&priv->buckets_out));
381 #endif
382
383 /* If DDM has already consumed bucket_thresh buckets, post new ones */
384
385 if (atomic_read(&priv->buckets_out) <= priv->max_buckets_out - priv->bucket_thresh) {
386 run_i2o_post_buckets_task.data = (void *)dev;
387 queue_task(&run_i2o_post_buckets_task, &tq_immediate);
388 mark_bh(IMMEDIATE_BH);
389 }
390
391 return;
392 }
393
394 /*
395 * i2o_lan_reply(): Callback function to handle other incoming messages
396 * except SendPost and ReceivePost.
397 */
398 static void i2o_lan_reply(struct i2o_handler *h, struct i2o_controller *iop,
399 struct i2o_message *m)
400 {
401 u32 *msg = (u32 *)m;
402 u8 unit = (u8)(msg[2]>>16); // InitiatorContext
403 struct net_device *dev = i2o_landevs[unit];
404
405 if ((msg[4] >> 24) != I2O_REPLY_STATUS_SUCCESS) {
406 if (i2o_lan_handle_status(dev, msg))
407 return;
408
409 /* In other error cases just report and continue */
410
411 i2o_report_status(KERN_INFO, dev->name, msg);
412 }
413
414 #ifdef DRIVERDEBUG
415 i2o_report_status(KERN_INFO, dev->name, msg);
416 #endif
417 switch (msg[1] >> 24) {
418 case LAN_RESET:
419 case LAN_SUSPEND:
420 /* default reply without payload */
421 break;
422
423 case I2O_CMD_UTIL_EVT_REGISTER:
424 case I2O_CMD_UTIL_EVT_ACK:
425 i2o_lan_handle_event(dev, msg);
426 break;
427
428 case I2O_CMD_UTIL_PARAMS_SET:
429 /* default reply, results in ReplyPayload (not examined) */
430 switch (msg[3] >> 16) {
431 case 1: dprintk(KERN_INFO "%s: Reply to set MAC filter mask.\n",
432 dev->name);
433 break;
434 case 2: dprintk(KERN_INFO "%s: Reply to set MAC table.\n",
435 dev->name);
436 break;
437 default: printk(KERN_WARNING "%s: Bad group 0x%04X\n",
438 dev->name,msg[3] >> 16);
439 }
440 break;
441
442 default:
443 printk(KERN_ERR "%s: No handler for the reply.\n",
444 dev->name);
445 i2o_report_status(KERN_INFO, dev->name, msg);
446 }
447 }
448
449 /* Functions used by the above callback functions:
450 =================================================*/
451 /*
452 * i2o_lan_release_buckets(): Free unused buckets (sk_buffs).
453 */
454 static void i2o_lan_release_buckets(struct net_device *dev, u32 *msg)
455 {
456 struct i2o_lan_local *priv = (struct i2o_lan_local *)dev->priv;
457 u8 trl_elem_size = (u8)(msg[3]>>8 & 0x000000FF);
458 u8 trl_count = (u8)(msg[3] & 0x000000FF);
459 u32 *pskb = &msg[6];
460
461 while (trl_count--) {
462 dprintk(KERN_DEBUG "%s: Releasing unused rx skb %p (trl_count=%d).\n",
463 dev->name, (struct sk_buff*)(*pskb),trl_count+1);
464 dev_kfree_skb_irq((struct sk_buff *)(*pskb));
465 pskb += 1 + trl_elem_size;
466 atomic_dec(&priv->buckets_out);
467 }
468 }
469
470 /*
471 * i2o_lan_event_reply(): Handle events.
472 */
473 static void i2o_lan_handle_event(struct net_device *dev, u32 *msg)
474 {
475 struct i2o_lan_local *priv = (struct i2o_lan_local *)dev->priv;
476 struct i2o_device *i2o_dev = priv->i2o_dev;
477 struct i2o_controller *iop = i2o_dev->controller;
478 u32 max_evt_data_size =iop->status_block->inbound_frame_size-5;
479 struct i2o_reply {
480 u32 header[4];
481 u32 evt_indicator;
482 u32 data[max_evt_data_size];
483 } *evt = (struct i2o_reply *)msg;
484 int evt_data_len = ((msg[0]>>16) - 5) * 4; /* real size*/
485
486 printk(KERN_INFO "%s: I2O event - ", dev->name);
487
488 if (msg[1]>>24 == I2O_CMD_UTIL_EVT_ACK) {
489 printk("Event acknowledgement reply.\n");
490 return;
491 }
492
493 /* Else evt->function == I2O_CMD_UTIL_EVT_REGISTER) */
494
495 switch (evt->evt_indicator) {
496 case I2O_EVT_IND_STATE_CHANGE: {
497 struct state_data {
498 u16 status;
499 u8 state;
500 u8 data;
501 } *evt_data = (struct state_data *)(evt->data[0]);
502
503 printk("State chance 0x%08x.\n", evt->data[0]);
504
505 /* If the DDM is in error state, recovery may be
506 * possible if status = Transmit or Receive Control
507 * Unit Inoperable.
508 */
509 if (evt_data->state==0x05 && evt_data->status==0x0003)
510 i2o_lan_reset(dev);
511 break;
512 }
513
514 case I2O_EVT_IND_FIELD_MODIFIED: {
515 u16 *work16 = (u16 *)evt->data;
516 printk("Group 0x%04x, field %d changed.\n", work16[0], work16[1]);
517 break;
518 }
519
520 case I2O_EVT_IND_VENDOR_EVT: {
521 int i;
522 printk("Vendor event:\n");
523 for (i = 0; i < evt_data_len / 4; i++)
524 printk(" 0x%08x\n", evt->data[i]);
525 break;
526 }
527
528 case I2O_EVT_IND_DEVICE_RESET:
529 /* Spec 2.0 p. 6-121:
530 * The event of _DEVICE_RESET should also be responded
531 */
532 printk("Device reset.\n");
533 if (i2o_event_ack(iop, msg) < 0)
534 printk("%s: Event Acknowledge timeout.\n", dev->name);
535 break;
536
537 #if 0
538 case I2O_EVT_IND_EVT_MASK_MODIFIED:
539 printk("Event mask modified, 0x%08x.\n", evt->data[0]);
540 break;
541
542 case I2O_EVT_IND_GENERAL_WARNING:
543 printk("General warning 0x%04x.\n", evt->data[0]);
544 break;
545
546 case I2O_EVT_IND_CONFIGURATION_FLAG:
547 printk("Configuration requested.\n");
548 break;
549
550 case I2O_EVT_IND_CAPABILITY_CHANGE:
551 printk("Capability change 0x%04x.\n", evt->data[0]);
552 break;
553
554 case I2O_EVT_IND_DEVICE_STATE:
555 printk("Device state changed 0x%08x.\n", evt->data[0]);
556 break;
557 #endif
558 case I2O_LAN_EVT_LINK_DOWN:
559 netif_carrier_off(dev);
560 printk("Link to the physical device is lost.\n");
561 break;
562
563 case I2O_LAN_EVT_LINK_UP:
564 netif_carrier_on(dev);
565 printk("Link to the physical device is (re)established.\n");
566 break;
567
568 case I2O_LAN_EVT_MEDIA_CHANGE:
569 printk("Media change.\n");
570 break;
571 default:
572 printk("0x%08x. No handler.\n", evt->evt_indicator);
573 }
574 }
575
576 /*
577 * i2o_lan_receive_post(): Post buckets to receive packets.
578 */
579 static int i2o_lan_receive_post(struct net_device *dev)
580 {
581 struct i2o_lan_local *priv = (struct i2o_lan_local *)dev->priv;
582 struct i2o_device *i2o_dev = priv->i2o_dev;
583 struct i2o_controller *iop = i2o_dev->controller;
584 struct sk_buff *skb;
585 u32 m, *msg;
586 u32 bucket_len = (dev->mtu + dev->hard_header_len);
587 u32 total = priv->max_buckets_out - atomic_read(&priv->buckets_out);
588 u32 bucket_count;
589 u32 *sgl_elem;
590 unsigned long flags;
591
592 /* Send (total/bucket_count) separate I2O requests */
593
594 while (total) {
595 m = I2O_POST_READ32(iop);
596 if (m == 0xFFFFFFFF)
597 return -ETIMEDOUT;
598 msg = (u32 *)(iop->mem_offset + m);
599
600 bucket_count = (total >= priv->sgl_max) ? priv->sgl_max : total;
601 total -= bucket_count;
602 atomic_add(bucket_count, &priv->buckets_out);
603
604 dprintk(KERN_INFO "%s: Sending %d buckets (size %d) to LAN DDM.\n",
605 dev->name, bucket_count, bucket_len);
606
607 /* Fill in the header */
608
609 __raw_writel(I2O_MESSAGE_SIZE(4 + 3 * bucket_count) | SGL_OFFSET_4, msg);
610 __raw_writel(LAN_RECEIVE_POST<<24 | HOST_TID<<12 | i2o_dev->lct_data.tid, msg+1);
611 __raw_writel(priv->unit << 16 | lan_receive_context, msg+2);
612 __raw_writel(bucket_count, msg+3);
613 sgl_elem = &msg[4];
614
615 /* Fill in the payload - contains bucket_count SGL elements */
616
617 while (bucket_count--) {
618 spin_lock_irqsave(&priv->fbl_lock, flags);
619 if (priv->i2o_fbl_tail >= 0)
620 skb = priv->i2o_fbl[priv->i2o_fbl_tail--];
621 else {
622 skb = dev_alloc_skb(bucket_len + 2);
623 if (skb == NULL) {
624 spin_unlock_irqrestore(&priv->fbl_lock, flags);
625 return -ENOMEM;
626 }
627 skb_reserve(skb, 2);
628 }
629 spin_unlock_irqrestore(&priv->fbl_lock, flags);
630
631 __raw_writel(0x51000000 | bucket_len, sgl_elem);
632 __raw_writel((u32)skb, sgl_elem+1);
633 __raw_writel(virt_to_bus(skb->data), sgl_elem+2);
634 sgl_elem += 3;
635 }
636
637 /* set LE flag and post */
638 __raw_writel(__raw_readl(sgl_elem-3) | 0x80000000, (sgl_elem-3));
639 i2o_post_message(iop, m);
640 }
641
642 return 0;
643 }
644
645 /* Functions called from the network stack, and functions called by them:
646 ========================================================================*/
647
648 /*
649 * i2o_lan_reset(): Reset the LAN adapter into the operational state and
650 * restore it to full operation.
651 */
652 static int i2o_lan_reset(struct net_device *dev)
653 {
654 struct i2o_lan_local *priv = (struct i2o_lan_local *)dev->priv;
655 struct i2o_device *i2o_dev = priv->i2o_dev;
656 struct i2o_controller *iop = i2o_dev->controller;
657 u32 msg[5];
658
659 dprintk(KERN_INFO "%s: LAN RESET MESSAGE.\n", dev->name);
660 msg[0] = FIVE_WORD_MSG_SIZE | SGL_OFFSET_0;
661 msg[1] = LAN_RESET<<24 | HOST_TID<<12 | i2o_dev->lct_data.tid;
662 msg[2] = priv->unit << 16 | lan_context; // InitiatorContext
663 msg[3] = 0; // TransactionContext
664 msg[4] = 0; // Keep posted buckets
665
666 if (i2o_post_this(iop, msg, sizeof(msg)) < 0)
667 return -ETIMEDOUT;
668
669 return 0;
670 }
671
672 /*
673 * i2o_lan_suspend(): Put LAN adapter into a safe, non-active state.
674 * IOP replies to any LAN class message with status error_no_data_transfer
675 * / suspended.
676 */
677 static int i2o_lan_suspend(struct net_device *dev)
678 {
679 struct i2o_lan_local *priv = (struct i2o_lan_local *)dev->priv;
680 struct i2o_device *i2o_dev = priv->i2o_dev;
681 struct i2o_controller *iop = i2o_dev->controller;
682 u32 msg[5];
683
684 dprintk(KERN_INFO "%s: LAN SUSPEND MESSAGE.\n", dev->name);
685 msg[0] = FIVE_WORD_MSG_SIZE | SGL_OFFSET_0;
686 msg[1] = LAN_SUSPEND<<24 | HOST_TID<<12 | i2o_dev->lct_data.tid;
687 msg[2] = priv->unit << 16 | lan_context; // InitiatorContext
688 msg[3] = 0; // TransactionContext
689 msg[4] = 1 << 16; // return posted buckets
690
691 if (i2o_post_this(iop, msg, sizeof(msg)) < 0)
692 return -ETIMEDOUT;
693
694 return 0;
695 }
696
697 /*
698 * i2o_set_ddm_parameters:
699 * These settings are done to ensure proper initial values for DDM.
700 * They can be changed via proc file system or vai configuration utility.
701 */
702 static void i2o_set_ddm_parameters(struct net_device *dev)
703 {
704 struct i2o_lan_local *priv = (struct i2o_lan_local *)dev->priv;
705 struct i2o_device *i2o_dev = priv->i2o_dev;
706 struct i2o_controller *iop = i2o_dev->controller;
707 u32 val;
708
709 /*
710 * When PacketOrphanlimit is set to the maximum packet length,
711 * the packets will never be split into two separate buckets
712 */
713 val = dev->mtu + dev->hard_header_len;
714 if (i2o_set_scalar(iop, i2o_dev->lct_data.tid, 0x0004, 2, &val, sizeof(val)) < 0)
715 printk(KERN_WARNING "%s: Unable to set PacketOrphanLimit.\n",
716 dev->name);
717 else
718 dprintk(KERN_INFO "%s: PacketOrphanLimit set to %d.\n",
719 dev->name, val);
720
721 /* When RxMaxPacketsBucket = 1, DDM puts only one packet into bucket */
722
723 val = 1;
724 if (i2o_set_scalar(iop, i2o_dev->lct_data.tid, 0x0008, 4, &val, sizeof(val)) <0)
725 printk(KERN_WARNING "%s: Unable to set RxMaxPacketsBucket.\n",
726 dev->name);
727 else
728 dprintk(KERN_INFO "%s: RxMaxPacketsBucket set to %d.\n",
729 dev->name, val);
730 return;
731 }
732
733 /* Functions called from the network stack:
734 ==========================================*/
735
736 /*
737 * i2o_lan_open(): Open the device to send/receive packets via
738 * the network device.
739 */
740 static int i2o_lan_open(struct net_device *dev)
741 {
742 struct i2o_lan_local *priv = (struct i2o_lan_local *)dev->priv;
743 struct i2o_device *i2o_dev = priv->i2o_dev;
744 struct i2o_controller *iop = i2o_dev->controller;
745 u32 mc_addr_group[64];
746
747 MOD_INC_USE_COUNT;
748
749 if (i2o_claim_device(i2o_dev, &i2o_lan_handler)) {
750 printk(KERN_WARNING "%s: Unable to claim the I2O LAN device.\n", dev->name);
751 MOD_DEC_USE_COUNT;
752 return -EAGAIN;
753 }
754 dprintk(KERN_INFO "%s: I2O LAN device (tid=%d) claimed by LAN OSM.\n",
755 dev->name, i2o_dev->lct_data.tid);
756
757 if (i2o_event_register(iop, i2o_dev->lct_data.tid,
758 priv->unit << 16 | lan_context, 0, priv->i2o_event_mask) < 0)
759 printk(KERN_WARNING "%s: Unable to set the event mask.\n", dev->name);
760
761 i2o_lan_reset(dev);
762
763 /* Get the max number of multicast addresses */
764
765 if (i2o_query_scalar(iop, i2o_dev->lct_data.tid, 0x0001, -1,
766 &mc_addr_group, sizeof(mc_addr_group)) < 0 ) {
767 printk(KERN_WARNING "%s: Unable to query LAN_MAC_ADDRESS group.\n", dev->name);
768 MOD_DEC_USE_COUNT;
769 return -EAGAIN;
770 }
771 priv->max_size_mc_table = mc_addr_group[8];
772
773 /* Malloc space for free bucket list to resuse reveive post buckets */
774
775 priv->i2o_fbl = kmalloc(priv->max_buckets_out * sizeof(struct sk_buff *),
776 GFP_KERNEL);
777 if (priv->i2o_fbl == NULL) {
778 MOD_DEC_USE_COUNT;
779 return -ENOMEM;
780 }
781 priv->i2o_fbl_tail = -1;
782 priv->send_active = 0;
783
784 i2o_set_ddm_parameters(dev);
785 i2o_lan_receive_post(dev);
786
787 netif_start_queue(dev);
788
789 return 0;
790 }
791
792 /*
793 * i2o_lan_close(): End the transfering.
794 */
795 static int i2o_lan_close(struct net_device *dev)
796 {
797 struct i2o_lan_local *priv = (struct i2o_lan_local *)dev->priv;
798 struct i2o_device *i2o_dev = priv->i2o_dev;
799 struct i2o_controller *iop = i2o_dev->controller;
800 int ret = 0;
801
802 netif_stop_queue(dev);
803 i2o_lan_suspend(dev);
804
805 if (i2o_event_register(iop, i2o_dev->lct_data.tid,
806 priv->unit << 16 | lan_context, 0, 0) < 0)
807 printk(KERN_WARNING "%s: Unable to clear the event mask.\n",
808 dev->name);
809
810 while (priv->i2o_fbl_tail >= 0)
811 dev_kfree_skb(priv->i2o_fbl[priv->i2o_fbl_tail--]);
812
813 kfree(priv->i2o_fbl);
814
815 if (i2o_release_device(i2o_dev, &i2o_lan_handler)) {
816 printk(KERN_WARNING "%s: Unable to unclaim I2O LAN device "
817 "(tid=%d).\n", dev->name, i2o_dev->lct_data.tid);
818 ret = -EBUSY;
819 }
820
821 MOD_DEC_USE_COUNT;
822
823 return ret;
824 }
825
826 /*
827 * i2o_lan_tx_timeout(): Tx timeout handler.
828 */
829 static void i2o_lan_tx_timeout(struct net_device *dev)
830 {
831 if (!netif_queue_stopped(dev))
832 netif_start_queue(dev);
833 }
834
835 /*
836 * i2o_lan_batch_send(): Send packets in batch.
837 * Both i2o_lan_sdu_send and i2o_lan_packet_send use this.
838 */
839 static void i2o_lan_batch_send(struct net_device *dev)
840 {
841 struct i2o_lan_local *priv = (struct i2o_lan_local *)dev->priv;
842 struct i2o_controller *iop = priv->i2o_dev->controller;
843
844 spin_lock_irq(&priv->tx_lock);
845 if (priv->tx_count != 0) {
846 dev->trans_start = jiffies;
847 i2o_post_message(iop, priv->m);
848 dprintk(KERN_DEBUG "%s: %d packets sent.\n", dev->name, priv->tx_count);
849 priv->tx_count = 0;
850 }
851 priv->send_active = 0;
852 spin_unlock_irq(&priv->tx_lock);
853 MOD_DEC_USE_COUNT;
854 }
855
856 #ifdef CONFIG_NET_FC
857 /*
858 * i2o_lan_sdu_send(): Send a packet, MAC header added by the DDM.
859 * Must be supported by Fibre Channel, optional for Ethernet/802.3,
860 * Token Ring, FDDI
861 */
862 static int i2o_lan_sdu_send(struct sk_buff *skb, struct net_device *dev)
863 {
864 struct i2o_lan_local *priv = (struct i2o_lan_local *)dev->priv;
865 struct i2o_device *i2o_dev = priv->i2o_dev;
866 struct i2o_controller *iop = i2o_dev->controller;
867 int tickssofar = jiffies - dev->trans_start;
868 u32 m, *msg;
869 u32 *sgl_elem;
870
871 spin_lock_irq(&priv->tx_lock);
872
873 priv->tx_count++;
874 atomic_inc(&priv->tx_out);
875
876 /*
877 * If tx_batch_mode = 0x00 forced to immediate mode
878 * If tx_batch_mode = 0x01 forced to batch mode
879 * If tx_batch_mode = 0x10 switch automatically, current mode immediate
880 * If tx_batch_mode = 0x11 switch automatically, current mode batch
881 * If gap between two packets is > 0 ticks, switch to immediate
882 */
883 if (priv->tx_batch_mode >> 1) // switch automatically
884 priv->tx_batch_mode = tickssofar ? 0x02 : 0x03;
885
886 if (priv->tx_count == 1) {
887 m = I2O_POST_READ32(iop);
888 if (m == 0xFFFFFFFF) {
889 spin_unlock_irq(&priv->tx_lock);
890 return 1;
891 }
892 msg = (u32 *)(iop->mem_offset + m);
893 priv->m = m;
894
895 __raw_writel(NINE_WORD_MSG_SIZE | 1<<12 | SGL_OFFSET_4, msg);
896 __raw_writel(LAN_PACKET_SEND<<24 | HOST_TID<<12 | i2o_dev->lct_data.tid, msg+1);
897 __raw_writel(priv->unit << 16 | lan_send_context, msg+2); // InitiatorContext
898 __raw_writel(1 << 30 | 1 << 3, msg+3); // TransmitControlWord
899
900 __raw_writel(0xD7000000 | skb->len, msg+4); // MAC hdr included
901 __raw_writel((u32)skb, msg+5); // TransactionContext
902 __raw_writel(virt_to_bus(skb->data), msg+6);
903 __raw_writel((u32)skb->mac.raw, msg+7);
904 __raw_writel((u32)skb->mac.raw+4, msg+8);
905
906 if ((priv->tx_batch_mode & 0x01) && !priv->send_active) {
907 priv->send_active = 1;
908 MOD_INC_USE_COUNT;
909 if (schedule_task(&priv->i2o_batch_send_task) == 0)
910 MOD_DEC_USE_COUNT;
911 }
912 } else { /* Add new SGL element to the previous message frame */
913
914 msg = (u32 *)(iop->mem_offset + priv->m);
915 sgl_elem = &msg[priv->tx_count * 5 + 1];
916
917 __raw_writel(I2O_MESSAGE_SIZE((__raw_readl(msg)>>16) + 5) | 1<<12 | SGL_OFFSET_4, msg);
918 __raw_writel(__raw_readl(sgl_elem-5) & 0x7FFFFFFF, sgl_elem-5); /* clear LE flag */
919 __raw_writel(0xD5000000 | skb->len, sgl_elem);
920 __raw_writel((u32)skb, sgl_elem+1);
921 __raw_writel(virt_to_bus(skb->data), sgl_elem+2);
922 __raw_writel((u32)(skb->mac.raw), sgl_elem+3);
923 __raw_writel((u32)(skb->mac.raw)+1, sgl_elem+4);
924 }
925
926 /* If tx not in batch mode or frame is full, send immediatelly */
927
928 if (!(priv->tx_batch_mode & 0x01) || priv->tx_count == priv->sgl_max) {
929 dev->trans_start = jiffies;
930 i2o_post_message(iop, priv->m);
931 dprintk(KERN_DEBUG "%s: %d packets sent.\n", dev->name, priv->tx_count);
932 priv->tx_count = 0;
933 }
934
935 /* If DDMs TxMaxPktOut reached, stop queueing layer to send more */
936
937 if (atomic_read(&priv->tx_out) >= priv->tx_max_out)
938 netif_stop_queue(dev);
939
940 spin_unlock_irq(&priv->tx_lock);
941 return 0;
942 }
943 #endif /* CONFIG_NET_FC */
944
945 /*
946 * i2o_lan_packet_send(): Send a packet as is, including the MAC header.
947 *
948 * Must be supported by Ethernet/802.3, Token Ring, FDDI, optional for
949 * Fibre Channel
950 */
951 static int i2o_lan_packet_send(struct sk_buff *skb, struct net_device *dev)
952 {
953 struct i2o_lan_local *priv = (struct i2o_lan_local *)dev->priv;
954 struct i2o_device *i2o_dev = priv->i2o_dev;
955 struct i2o_controller *iop = i2o_dev->controller;
956 int tickssofar = jiffies - dev->trans_start;
957 u32 m, *msg;
958 u32 *sgl_elem;
959
960 spin_lock_irq(&priv->tx_lock);
961
962 priv->tx_count++;
963 atomic_inc(&priv->tx_out);
964
965 /*
966 * If tx_batch_mode = 0x00 forced to immediate mode
967 * If tx_batch_mode = 0x01 forced to batch mode
968 * If tx_batch_mode = 0x10 switch automatically, current mode immediate
969 * If tx_batch_mode = 0x11 switch automatically, current mode batch
970 * If gap between two packets is > 0 ticks, switch to immediate
971 */
972 if (priv->tx_batch_mode >> 1) // switch automatically
973 priv->tx_batch_mode = tickssofar ? 0x02 : 0x03;
974
975 if (priv->tx_count == 1) {
976 m = I2O_POST_READ32(iop);
977 if (m == 0xFFFFFFFF) {
978 spin_unlock_irq(&priv->tx_lock);
979 return 1;
980 }
981 msg = (u32 *)(iop->mem_offset + m);
982 priv->m = m;
983
984 __raw_writel(SEVEN_WORD_MSG_SIZE | 1<<12 | SGL_OFFSET_4, msg);
985 __raw_writel(LAN_PACKET_SEND<<24 | HOST_TID<<12 | i2o_dev->lct_data.tid, msg+1);
986 __raw_writel(priv->unit << 16 | lan_send_context, msg+2); // InitiatorContext
987 __raw_writel(1 << 30 | 1 << 3, msg+3); // TransmitControlWord
988 // bit 30: reply as soon as transmission attempt is complete
989 // bit 3: Suppress CRC generation
990 __raw_writel(0xD5000000 | skb->len, msg+4); // MAC hdr included
991 __raw_writel((u32)skb, msg+5); // TransactionContext
992 __raw_writel(virt_to_bus(skb->data), msg+6);
993
994 if ((priv->tx_batch_mode & 0x01) && !priv->send_active) {
995 priv->send_active = 1;
996 MOD_INC_USE_COUNT;
997 if (schedule_task(&priv->i2o_batch_send_task) == 0)
998 MOD_DEC_USE_COUNT;
999 }
1000 } else { /* Add new SGL element to the previous message frame */
1001
1002 msg = (u32 *)(iop->mem_offset + priv->m);
1003 sgl_elem = &msg[priv->tx_count * 3 + 1];
1004
1005 __raw_writel(I2O_MESSAGE_SIZE((__raw_readl(msg)>>16) + 3) | 1<<12 | SGL_OFFSET_4, msg);
1006 __raw_writel(__raw_readl(sgl_elem-3) & 0x7FFFFFFF, sgl_elem-3); /* clear LE flag */
1007 __raw_writel(0xD5000000 | skb->len, sgl_elem);
1008 __raw_writel((u32)skb, sgl_elem+1);
1009 __raw_writel(virt_to_bus(skb->data), sgl_elem+2);
1010 }
1011
1012 /* If tx is in immediate mode or frame is full, send now */
1013
1014 if (!(priv->tx_batch_mode & 0x01) || priv->tx_count == priv->sgl_max) {
1015 dev->trans_start = jiffies;
1016 i2o_post_message(iop, priv->m);
1017 dprintk(KERN_DEBUG "%s: %d packets sent.\n", dev->name, priv->tx_count);
1018 priv->tx_count = 0;
1019 }
1020
1021 /* If DDMs TxMaxPktOut reached, stop queueing layer to send more */
1022
1023 if (atomic_read(&priv->tx_out) >= priv->tx_max_out)
1024 netif_stop_queue(dev);
1025
1026 spin_unlock_irq(&priv->tx_lock);
1027 return 0;
1028 }
1029
1030 /*
1031 * i2o_lan_get_stats(): Fill in the statistics.
1032 */
1033 static struct net_device_stats *i2o_lan_get_stats(struct net_device *dev)
1034 {
1035 struct i2o_lan_local *priv = (struct i2o_lan_local *)dev->priv;
1036 struct i2o_device *i2o_dev = priv->i2o_dev;
1037 struct i2o_controller *iop = i2o_dev->controller;
1038 u64 val64[16];
1039 u64 supported_group[4] = { 0, 0, 0, 0 };
1040
1041 if (i2o_query_scalar(iop, i2o_dev->lct_data.tid, 0x0100, -1, val64,
1042 sizeof(val64)) < 0)
1043 printk(KERN_INFO "%s: Unable to query LAN_HISTORICAL_STATS.\n", dev->name);
1044 else {
1045 dprintk(KERN_DEBUG "%s: LAN_HISTORICAL_STATS queried.\n", dev->name);
1046 priv->stats.tx_packets = val64[0];
1047 priv->stats.tx_bytes = val64[1];
1048 priv->stats.rx_packets = val64[2];
1049 priv->stats.rx_bytes = val64[3];
1050 priv->stats.tx_errors = val64[4];
1051 priv->stats.rx_errors = val64[5];
1052 priv->stats.rx_dropped = val64[6];
1053 }
1054
1055 if (i2o_query_scalar(iop, i2o_dev->lct_data.tid, 0x0180, -1,
1056 &supported_group, sizeof(supported_group)) < 0)
1057 printk(KERN_INFO "%s: Unable to query LAN_SUPPORTED_OPTIONAL_HISTORICAL_STATS.\n", dev->name);
1058
1059 if (supported_group[2]) {
1060 if (i2o_query_scalar(iop, i2o_dev->lct_data.tid, 0x0183, -1,
1061 val64, sizeof(val64)) < 0)
1062 printk(KERN_INFO "%s: Unable to query LAN_OPTIONAL_RX_HISTORICAL_STATS.\n", dev->name);
1063 else {
1064 dprintk(KERN_DEBUG "%s: LAN_OPTIONAL_RX_HISTORICAL_STATS queried.\n", dev->name);
1065 priv->stats.multicast = val64[4];
1066 priv->stats.rx_length_errors = val64[10];
1067 priv->stats.rx_crc_errors = val64[0];
1068 }
1069 }
1070
1071 if (i2o_dev->lct_data.sub_class == I2O_LAN_ETHERNET) {
1072 u64 supported_stats = 0;
1073 if (i2o_query_scalar(iop, i2o_dev->lct_data.tid, 0x0200, -1,
1074 val64, sizeof(val64)) < 0)
1075 printk(KERN_INFO "%s: Unable to query LAN_802_3_HISTORICAL_STATS.\n", dev->name);
1076 else {
1077 dprintk(KERN_DEBUG "%s: LAN_802_3_HISTORICAL_STATS queried.\n", dev->name);
1078 priv->stats.transmit_collision = val64[1] + val64[2];
1079 priv->stats.rx_frame_errors = val64[0];
1080 priv->stats.tx_carrier_errors = val64[6];
1081 }
1082
1083 if (i2o_query_scalar(iop, i2o_dev->lct_data.tid, 0x0280, -1,
1084 &supported_stats, sizeof(supported_stats)) < 0)
1085 printk(KERN_INFO "%s: Unable to query LAN_SUPPORTED_802_3_HISTORICAL_STATS.\n", dev->name);
1086
1087 if (supported_stats != 0) {
1088 if (i2o_query_scalar(iop, i2o_dev->lct_data.tid, 0x0281, -1,
1089 val64, sizeof(val64)) < 0)
1090 printk(KERN_INFO "%s: Unable to query LAN_OPTIONAL_802_3_HISTORICAL_STATS.\n", dev->name);
1091 else {
1092 dprintk(KERN_DEBUG "%s: LAN_OPTIONAL_802_3_HISTORICAL_STATS queried.\n", dev->name);
1093 if (supported_stats & 0x1)
1094 priv->stats.rx_over_errors = val64[0];
1095 if (supported_stats & 0x4)
1096 priv->stats.tx_heartbeat_errors = val64[2];
1097 }
1098 }
1099 }
1100
1101 #ifdef CONFIG_TR
1102 if (i2o_dev->lct_data.sub_class == I2O_LAN_TR) {
1103 if (i2o_query_scalar(iop, i2o_dev->lct_data.tid, 0x0300, -1,
1104 val64, sizeof(val64)) < 0)
1105 printk(KERN_INFO "%s: Unable to query LAN_802_5_HISTORICAL_STATS.\n", dev->name);
1106 else {
1107 struct tr_statistics *stats =
1108 (struct tr_statistics *)&priv->stats;
1109 dprintk(KERN_DEBUG "%s: LAN_802_5_HISTORICAL_STATS queried.\n", dev->name);
1110
1111 stats->line_errors = val64[0];
1112 stats->internal_errors = val64[7];
1113 stats->burst_errors = val64[4];
1114 stats->A_C_errors = val64[2];
1115 stats->abort_delimiters = val64[3];
1116 stats->lost_frames = val64[1];
1117 /* stats->recv_congest_count = ?; FIXME ??*/
1118 stats->frame_copied_errors = val64[5];
1119 stats->frequency_errors = val64[6];
1120 stats->token_errors = val64[9];
1121 }
1122 /* Token Ring optional stats not yet defined */
1123 }
1124 #endif
1125
1126 #ifdef CONFIG_FDDI
1127 if (i2o_dev->lct_data.sub_class == I2O_LAN_FDDI) {
1128 if (i2o_query_scalar(iop, i2o_dev->lct_data.tid, 0x0400, -1,
1129 val64, sizeof(val64)) < 0)
1130 printk(KERN_INFO "%s: Unable to query LAN_FDDI_HISTORICAL_STATS.\n", dev->name);
1131 else {
1132 dprintk(KERN_DEBUG "%s: LAN_FDDI_HISTORICAL_STATS queried.\n", dev->name);
1133 priv->stats.smt_cf_state = val64[0];
1134 memcpy(priv->stats.mac_upstream_nbr, &val64[1], FDDI_K_ALEN);
1135 memcpy(priv->stats.mac_downstream_nbr, &val64[2], FDDI_K_ALEN);
1136 priv->stats.mac_error_cts = val64[3];
1137 priv->stats.mac_lost_cts = val64[4];
1138 priv->stats.mac_rmt_state = val64[5];
1139 memcpy(priv->stats.port_lct_fail_cts, &val64[6], 8);
1140 memcpy(priv->stats.port_lem_reject_cts, &val64[7], 8);
1141 memcpy(priv->stats.port_lem_cts, &val64[8], 8);
1142 memcpy(priv->stats.port_pcm_state, &val64[9], 8);
1143 }
1144 /* FDDI optional stats not yet defined */
1145 }
1146 #endif
1147
1148 #ifdef CONFIG_NET_FC
1149 /* Fibre Channel Statistics not yet defined in 1.53 nor 2.0 */
1150 #endif
1151
1152 return (struct net_device_stats *)&priv->stats;
1153 }
1154
1155 /*
1156 * i2o_lan_set_mc_filter(): Post a request to set multicast filter.
1157 */
1158 int i2o_lan_set_mc_filter(struct net_device *dev, u32 filter_mask)
1159 {
1160 struct i2o_lan_local *priv = (struct i2o_lan_local *)dev->priv;
1161 struct i2o_device *i2o_dev = priv->i2o_dev;
1162 struct i2o_controller *iop = i2o_dev->controller;
1163 u32 msg[10];
1164
1165 msg[0] = TEN_WORD_MSG_SIZE | SGL_OFFSET_5;
1166 msg[1] = I2O_CMD_UTIL_PARAMS_SET << 24 | HOST_TID << 12 | i2o_dev->lct_data.tid;
1167 msg[2] = priv->unit << 16 | lan_context;
1168 msg[3] = 0x0001 << 16 | 3 ; // TransactionContext: group&field
1169 msg[4] = 0;
1170 msg[5] = 0xCC000000 | 16; // Immediate data SGL
1171 msg[6] = 1; // OperationCount
1172 msg[7] = 0x0001<<16 | I2O_PARAMS_FIELD_SET; // Group, Operation
1173 msg[8] = 3 << 16 | 1; // FieldIndex, FieldCount
1174 msg[9] = filter_mask; // Value
1175
1176 return i2o_post_this(iop, msg, sizeof(msg));
1177 }
1178
1179 /*
1180 * i2o_lan_set_mc_table(): Post a request to set LAN_MULTICAST_MAC_ADDRESS table.
1181 */
1182 int i2o_lan_set_mc_table(struct net_device *dev)
1183 {
1184 struct i2o_lan_local *priv = (struct i2o_lan_local *)dev->priv;
1185 struct i2o_device *i2o_dev = priv->i2o_dev;
1186 struct i2o_controller *iop = i2o_dev->controller;
1187 struct dev_mc_list *mc;
1188 u32 msg[10 + 2 * dev->mc_count];
1189 u8 *work8 = (u8 *)(msg + 10);
1190
1191 msg[0] = I2O_MESSAGE_SIZE(10 + 2 * dev->mc_count) | SGL_OFFSET_5;
1192 msg[1] = I2O_CMD_UTIL_PARAMS_SET << 24 | HOST_TID << 12 | i2o_dev->lct_data.tid;
1193 msg[2] = priv->unit << 16 | lan_context; // InitiatorContext
1194 msg[3] = 0x0002 << 16 | (u16)-1; // TransactionContext
1195 msg[4] = 0; // OperationFlags
1196 msg[5] = 0xCC000000 | (16 + 8 * dev->mc_count); // Immediate data SGL
1197 msg[6] = 2; // OperationCount
1198 msg[7] = 0x0002 << 16 | I2O_PARAMS_TABLE_CLEAR; // Group, Operation
1199 msg[8] = 0x0002 << 16 | I2O_PARAMS_ROW_ADD; // Group, Operation
1200 msg[9] = dev->mc_count << 16 | (u16)-1; // RowCount, FieldCount
1201
1202 for (mc = dev->mc_list; mc ; mc = mc->next, work8 += 8) {
1203 memset(work8, 0, 8);
1204 memcpy(work8, mc->dmi_addr, mc->dmi_addrlen); // Values
1205 }
1206
1207 return i2o_post_this(iop, msg, sizeof(msg));
1208 }
1209
1210 /*
1211 * i2o_lan_set_multicast_list(): Enable a network device to receive packets
1212 * not send to the protocol address.
1213 */
1214 static void i2o_lan_set_multicast_list(struct net_device *dev)
1215 {
1216 struct i2o_lan_local *priv = (struct i2o_lan_local *)dev->priv;
1217 u32 filter_mask;
1218
1219 if (dev->flags & IFF_PROMISC) {
1220 filter_mask = 0x00000002;
1221 dprintk(KERN_INFO "%s: Enabling promiscuous mode...\n", dev->name);
1222 } else if ((dev->flags & IFF_ALLMULTI) || dev->mc_count > priv->max_size_mc_table) {
1223 filter_mask = 0x00000004;
1224 dprintk(KERN_INFO "%s: Enabling all multicast mode...\n", dev->name);
1225 } else if (dev->mc_count) {
1226 filter_mask = 0x00000000;
1227 dprintk(KERN_INFO "%s: Enabling multicast mode...\n", dev->name);
1228 if (i2o_lan_set_mc_table(dev) < 0)
1229 printk(KERN_WARNING "%s: Unable to send MAC table.\n", dev->name);
1230 } else {
1231 filter_mask = 0x00000300; // Broadcast, Multicast disabled
1232 dprintk(KERN_INFO "%s: Enabling unicast mode...\n", dev->name);
1233 }
1234
1235 /* Finally copy new FilterMask to DDM */
1236
1237 if (i2o_lan_set_mc_filter(dev, filter_mask) < 0)
1238 printk(KERN_WARNING "%s: Unable to send MAC FilterMask.\n", dev->name);
1239 }
1240
1241 /*
1242 * i2o_lan_change_mtu(): Change maximum transfer unit size.
1243 */
1244 static int i2o_lan_change_mtu(struct net_device *dev, int new_mtu)
1245 {
1246 struct i2o_lan_local *priv = (struct i2o_lan_local *)dev->priv;
1247 struct i2o_device *i2o_dev = priv->i2o_dev;
1248 u32 max_pkt_size;
1249
1250 if (i2o_query_scalar(i2o_dev->controller, i2o_dev->lct_data.tid,
1251 0x0000, 6, &max_pkt_size, 4) < 0)
1252 return -EFAULT;
1253
1254 if (new_mtu < 68 || new_mtu > 9000 || new_mtu > max_pkt_size)
1255 return -EINVAL;
1256
1257 dev->mtu = new_mtu;
1258
1259 i2o_lan_suspend(dev); // to SUSPENDED state, return buckets
1260
1261 while (priv->i2o_fbl_tail >= 0) // free buffered buckets
1262 dev_kfree_skb(priv->i2o_fbl[priv->i2o_fbl_tail--]);
1263
1264 i2o_lan_reset(dev); // to OPERATIONAL state
1265 i2o_set_ddm_parameters(dev); // reset some parameters
1266 i2o_lan_receive_post(dev); // post new buckets (new size)
1267
1268 return 0;
1269 }
1270
1271 /* Functions to initialize I2O LAN OSM:
1272 ======================================*/
1273
1274 /*
1275 * i2o_lan_register_device(): Register LAN class device to kernel.
1276 */
1277 struct net_device *i2o_lan_register_device(struct i2o_device *i2o_dev)
1278 {
1279 struct net_device *dev = NULL;
1280 struct i2o_lan_local *priv = NULL;
1281 u8 hw_addr[8];
1282 u32 tx_max_out = 0;
1283 unsigned short (*type_trans)(struct sk_buff *, struct net_device *);
1284 void (*unregister_dev)(struct net_device *dev);
1285
1286 switch (i2o_dev->lct_data.sub_class) {
1287 case I2O_LAN_ETHERNET:
1288 dev = init_etherdev(NULL, sizeof(struct i2o_lan_local));
1289 if (dev == NULL)
1290 return NULL;
1291 type_trans = eth_type_trans;
1292 unregister_dev = unregister_netdev;
1293 break;
1294
1295 #ifdef CONFIG_ANYLAN
1296 case I2O_LAN_100VG:
1297 printk(KERN_ERR "i2o_lan: 100base VG not yet supported.\n");
1298 return NULL;
1299 break;
1300 #endif
1301
1302 #ifdef CONFIG_TR
1303 case I2O_LAN_TR:
1304 dev = init_trdev(NULL, sizeof(struct i2o_lan_local));
1305 if (dev==NULL)
1306 return NULL;
1307 type_trans = tr_type_trans;
1308 unregister_dev = unregister_trdev;
1309 break;
1310 #endif
1311
1312 #ifdef CONFIG_FDDI
1313 case I2O_LAN_FDDI:
1314 {
1315 int size = sizeof(struct net_device) + sizeof(struct i2o_lan_local);
1316
1317 dev = (struct net_device *) kmalloc(size, GFP_KERNEL);
1318 if (dev == NULL)
1319 return NULL;
1320 memset((char *)dev, 0, size);
1321 dev->priv = (void *)(dev + 1);
1322
1323 if (dev_alloc_name(dev, "fddi%d") < 0) {
1324 printk(KERN_WARNING "i2o_lan: Too many FDDI devices.\n");
1325 kfree(dev);
1326 return NULL;
1327 }
1328 type_trans = fddi_type_trans;
1329 unregister_dev = (void *)unregister_netdevice;
1330
1331 fddi_setup(dev);
1332 register_netdev(dev);
1333 }
1334 break;
1335 #endif
1336
1337 #ifdef CONFIG_NET_FC
1338 case I2O_LAN_FIBRE_CHANNEL:
1339 dev = init_fcdev(NULL, sizeof(struct i2o_lan_local));
1340 if (dev == NULL)
1341 return NULL;
1342 type_trans = NULL;
1343 /* FIXME: Move fc_type_trans() from drivers/net/fc/iph5526.c to net/802/fc.c
1344 * and export it in include/linux/fcdevice.h
1345 * type_trans = fc_type_trans;
1346 */
1347 unregister_dev = (void *)unregister_fcdev;
1348 break;
1349 #endif
1350
1351 case I2O_LAN_UNKNOWN:
1352 default:
1353 printk(KERN_ERR "i2o_lan: LAN type 0x%04x not supported.\n",
1354 i2o_dev->lct_data.sub_class);
1355 return NULL;
1356 }
1357
1358 priv = (struct i2o_lan_local *)dev->priv;
1359 priv->i2o_dev = i2o_dev;
1360 priv->type_trans = type_trans;
1361 priv->sgl_max = (i2o_dev->controller->status_block->inbound_frame_size - 4) / 3;
1362 atomic_set(&priv->buckets_out, 0);
1363
1364 /* Set default values for user configurable parameters */
1365 /* Private values are changed via /proc file system */
1366
1367 priv->max_buckets_out = max_buckets_out;
1368 priv->bucket_thresh = bucket_thresh;
1369 priv->rx_copybreak = rx_copybreak;
1370 priv->tx_batch_mode = tx_batch_mode & 0x03;
1371 priv->i2o_event_mask = i2o_event_mask;
1372
1373 priv->tx_lock = SPIN_LOCK_UNLOCKED;
1374 priv->fbl_lock = SPIN_LOCK_UNLOCKED;
1375
1376 unit++;
1377 i2o_landevs[unit] = dev;
1378 priv->unit = unit;
1379
1380 if (i2o_query_scalar(i2o_dev->controller, i2o_dev->lct_data.tid,
1381 0x0001, 0, &hw_addr, sizeof(hw_addr)) < 0) {
1382 printk(KERN_ERR "%s: Unable to query hardware address.\n", dev->name);
1383 unit--;
1384 unregister_dev(dev);
1385 kfree(dev);
1386 return NULL;
1387 }
1388 dprintk(KERN_DEBUG "%s: hwaddr = %02X:%02X:%02X:%02X:%02X:%02X\n",
1389 dev->name, hw_addr[0], hw_addr[1], hw_addr[2], hw_addr[3],
1390 hw_addr[4], hw_addr[5]);
1391
1392 dev->addr_len = 6;
1393 memcpy(dev->dev_addr, hw_addr, 6);
1394
1395 if (i2o_query_scalar(i2o_dev->controller, i2o_dev->lct_data.tid,
1396 0x0007, 2, &tx_max_out, sizeof(tx_max_out)) < 0) {
1397 printk(KERN_ERR "%s: Unable to query max TX queue.\n", dev->name);
1398 unit--;
1399 unregister_dev(dev);
1400 kfree(dev);
1401 return NULL;
1402 }
1403 dprintk(KERN_INFO "%s: Max TX Outstanding = %d.\n", dev->name, tx_max_out);
1404 priv->tx_max_out = tx_max_out;
1405 atomic_set(&priv->tx_out, 0);
1406 priv->tx_count = 0;
1407
1408 INIT_LIST_HEAD(&priv->i2o_batch_send_task.list);
1409 priv->i2o_batch_send_task.sync = 0;
1410 priv->i2o_batch_send_task.routine = (void *)i2o_lan_batch_send;
1411 priv->i2o_batch_send_task.data = (void *)dev;
1412
1413 dev->open = i2o_lan_open;
1414 dev->stop = i2o_lan_close;
1415 dev->get_stats = i2o_lan_get_stats;
1416 dev->set_multicast_list = i2o_lan_set_multicast_list;
1417 dev->tx_timeout = i2o_lan_tx_timeout;
1418 dev->watchdog_timeo = I2O_LAN_TX_TIMEOUT;
1419
1420 #ifdef CONFIG_NET_FC
1421 if (i2o_dev->lct_data.sub_class == I2O_LAN_FIBRE_CHANNEL)
1422 dev->hard_start_xmit = i2o_lan_sdu_send;
1423 else
1424 #endif
1425 dev->hard_start_xmit = i2o_lan_packet_send;
1426
1427 if (i2o_dev->lct_data.sub_class == I2O_LAN_ETHERNET)
1428 dev->change_mtu = i2o_lan_change_mtu;
1429
1430 return dev;
1431 }
1432
1433 #ifdef MODULE
1434 #define i2o_lan_init init_module
1435 #endif
1436
1437 int __init i2o_lan_init(void)
1438 {
1439 struct net_device *dev;
1440 int i;
1441
1442 printk(KERN_INFO "I2O LAN OSM (C) 1999 University of Helsinki.\n");
1443
1444 /* Module params are used as global defaults for private values */
1445
1446 if (max_buckets_out > I2O_LAN_MAX_BUCKETS_OUT)
1447 max_buckets_out = I2O_LAN_MAX_BUCKETS_OUT;
1448 if (bucket_thresh > max_buckets_out)
1449 bucket_thresh = max_buckets_out;
1450
1451 /* Install handlers for incoming replies */
1452
1453 if (i2o_install_handler(&i2o_lan_send_handler) < 0) {
1454 printk(KERN_ERR "i2o_lan: Unable to register I2O LAN OSM.\n");
1455 return -EINVAL;
1456 }
1457 lan_send_context = i2o_lan_send_handler.context;
1458
1459 if (i2o_install_handler(&i2o_lan_receive_handler) < 0) {
1460 printk(KERN_ERR "i2o_lan: Unable to register I2O LAN OSM.\n");
1461 return -EINVAL;
1462 }
1463 lan_receive_context = i2o_lan_receive_handler.context;
1464
1465 if (i2o_install_handler(&i2o_lan_handler) < 0) {
1466 printk(KERN_ERR "i2o_lan: Unable to register I2O LAN OSM.\n");
1467 return -EINVAL;
1468 }
1469 lan_context = i2o_lan_handler.context;
1470
1471 for(i=0; i <= MAX_LAN_CARDS; i++)
1472 i2o_landevs[i] = NULL;
1473
1474 for (i=0; i < MAX_I2O_CONTROLLERS; i++) {
1475 struct i2o_controller *iop = i2o_find_controller(i);
1476 struct i2o_device *i2o_dev;
1477
1478 if (iop==NULL)
1479 continue;
1480
1481 for (i2o_dev=iop->devices;i2o_dev != NULL;i2o_dev=i2o_dev->next) {
1482
1483 if (i2o_dev->lct_data.class_id != I2O_CLASS_LAN)
1484 continue;
1485
1486 /* Make sure device not already claimed by an ISM */
1487 if (i2o_dev->lct_data.user_tid != 0xFFF)
1488 continue;
1489
1490 if (unit == MAX_LAN_CARDS) {
1491 i2o_unlock_controller(iop);
1492 printk(KERN_WARNING "i2o_lan: Too many I2O LAN devices.\n");
1493 return -EINVAL;
1494 }
1495
1496 dev = i2o_lan_register_device(i2o_dev);
1497 if (dev == NULL) {
1498 printk(KERN_ERR "i2o_lan: Unable to register I2O LAN device 0x%04x.\n",
1499 i2o_dev->lct_data.sub_class);
1500 continue;
1501 }
1502
1503 printk(KERN_INFO "%s: I2O LAN device registered, "
1504 "subclass = 0x%04x, unit = %d, tid = %d.\n",
1505 dev->name, i2o_dev->lct_data.sub_class,
1506 ((struct i2o_lan_local *)dev->priv)->unit,
1507 i2o_dev->lct_data.tid);
1508 }
1509
1510 i2o_unlock_controller(iop);
1511 }
1512
1513 dprintk(KERN_INFO "%d I2O LAN devices found and registered.\n", unit+1);
1514
1515 return 0;
1516 }
1517
1518 #ifdef MODULE
1519
1520 void cleanup_module(void)
1521 {
1522 int i;
1523
1524 for (i = 0; i <= unit; i++) {
1525 struct net_device *dev = i2o_landevs[i];
1526 struct i2o_lan_local *priv = (struct i2o_lan_local *)dev->priv;
1527 struct i2o_device *i2o_dev = priv->i2o_dev;
1528
1529 switch (i2o_dev->lct_data.sub_class) {
1530 case I2O_LAN_ETHERNET:
1531 unregister_netdev(dev);
1532 break;
1533 #ifdef CONFIG_FDDI
1534 case I2O_LAN_FDDI:
1535 unregister_netdevice(dev);
1536 break;
1537 #endif
1538 #ifdef CONFIG_TR
1539 case I2O_LAN_TR:
1540 unregister_trdev(dev);
1541 break;
1542 #endif
1543 #ifdef CONFIG_NET_FC
1544 case I2O_LAN_FIBRE_CHANNEL:
1545 unregister_fcdev(dev);
1546 break;
1547 #endif
1548 default:
1549 printk(KERN_WARNING "%s: Spurious I2O LAN subclass 0x%08x.\n",
1550 dev->name, i2o_dev->lct_data.sub_class);
1551 }
1552
1553 dprintk(KERN_INFO "%s: I2O LAN device unregistered.\n",
1554 dev->name);
1555 kfree(dev);
1556 }
1557
1558 i2o_remove_handler(&i2o_lan_handler);
1559 i2o_remove_handler(&i2o_lan_send_handler);
1560 i2o_remove_handler(&i2o_lan_receive_handler);
1561 }
1562
1563 EXPORT_NO_SYMBOLS;
1564
1565 MODULE_AUTHOR("University of Helsinki, Department of Computer Science");
1566 MODULE_DESCRIPTION("I2O Lan OSM");
1567
1568 MODULE_PARM(max_buckets_out, "1-" __MODULE_STRING(I2O_LAN_MAX_BUCKETS_OUT) "i");
1569 MODULE_PARM_DESC(max_buckets_out, "Total number of buckets to post (1-)");
1570 MODULE_PARM(bucket_thresh, "1-" __MODULE_STRING(I2O_LAN_MAX_BUCKETS_OUT) "i");
1571 MODULE_PARM_DESC(bucket_thresh, "Bucket post threshold (1-)");
1572 MODULE_PARM(rx_copybreak, "1-" "i");
1573 MODULE_PARM_DESC(rx_copybreak, "Copy breakpoint for copy only small frames (1-)");
1574 MODULE_PARM(tx_batch_mode, "0-2" "i");
1575 MODULE_PARM_DESC(tx_batch_mode, "0=Send immediatelly, 1=Send in batches, 2=Switch automatically");
1576
1577 #endif
1578