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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * rionet - Ethernet driver over RapidIO messaging services
4 *
5 * Copyright 2005 MontaVista Software, Inc.
6 * Matt Porter <mporter@kernel.crashing.org>
7 */
8
9#include <linux/module.h>
10#include <linux/kernel.h>
11#include <linux/dma-mapping.h>
12#include <linux/delay.h>
13#include <linux/rio.h>
14#include <linux/rio_drv.h>
15#include <linux/slab.h>
16#include <linux/rio_ids.h>
17
18#include <linux/netdevice.h>
19#include <linux/etherdevice.h>
20#include <linux/skbuff.h>
21#include <linux/crc32.h>
22#include <linux/ethtool.h>
23#include <linux/reboot.h>
24
25#define DRV_NAME "rionet"
26#define DRV_VERSION "0.3"
27#define DRV_AUTHOR "Matt Porter <mporter@kernel.crashing.org>"
28#define DRV_DESC "Ethernet over RapidIO"
29
30MODULE_AUTHOR(DRV_AUTHOR);
31MODULE_DESCRIPTION(DRV_DESC);
32MODULE_LICENSE("GPL");
33
34#define RIONET_DEFAULT_MSGLEVEL \
35 (NETIF_MSG_DRV | \
36 NETIF_MSG_LINK | \
37 NETIF_MSG_RX_ERR | \
38 NETIF_MSG_TX_ERR)
39
40#define RIONET_DOORBELL_JOIN 0x1000
41#define RIONET_DOORBELL_LEAVE 0x1001
42
43#define RIONET_MAILBOX 0
44
45#define RIONET_TX_RING_SIZE CONFIG_RIONET_TX_SIZE
46#define RIONET_RX_RING_SIZE CONFIG_RIONET_RX_SIZE
47#define RIONET_MAX_NETS 8
48#define RIONET_MSG_SIZE RIO_MAX_MSG_SIZE
49#define RIONET_MAX_MTU (RIONET_MSG_SIZE - ETH_HLEN)
50
51struct rionet_private {
52 struct rio_mport *mport;
53 struct sk_buff *rx_skb[RIONET_RX_RING_SIZE];
54 struct sk_buff *tx_skb[RIONET_TX_RING_SIZE];
55 int rx_slot;
56 int tx_slot;
57 int tx_cnt;
58 int ack_slot;
59 spinlock_t lock;
60 spinlock_t tx_lock;
61 u32 msg_enable;
62 bool open;
63};
64
65struct rionet_peer {
66 struct list_head node;
67 struct rio_dev *rdev;
68 struct resource *res;
69};
70
71struct rionet_net {
72 struct net_device *ndev;
73 struct list_head peers;
74 spinlock_t lock; /* net info access lock */
75 struct rio_dev **active;
76 int nact; /* number of active peers */
77};
78
79static struct rionet_net nets[RIONET_MAX_NETS];
80
81#define is_rionet_capable(src_ops, dst_ops) \
82 ((src_ops & RIO_SRC_OPS_DATA_MSG) && \
83 (dst_ops & RIO_DST_OPS_DATA_MSG) && \
84 (src_ops & RIO_SRC_OPS_DOORBELL) && \
85 (dst_ops & RIO_DST_OPS_DOORBELL))
86#define dev_rionet_capable(dev) \
87 is_rionet_capable(dev->src_ops, dev->dst_ops)
88
89#define RIONET_MAC_MATCH(x) (!memcmp((x), "\00\01\00\01", 4))
90#define RIONET_GET_DESTID(x) ((*((u8 *)x + 4) << 8) | *((u8 *)x + 5))
91
92static int rionet_rx_clean(struct net_device *ndev)
93{
94 int i;
95 int error = 0;
96 struct rionet_private *rnet = netdev_priv(ndev);
97 void *data;
98
99 i = rnet->rx_slot;
100
101 do {
102 if (!rnet->rx_skb[i])
103 continue;
104
105 if (!(data = rio_get_inb_message(rnet->mport, RIONET_MAILBOX)))
106 break;
107
108 rnet->rx_skb[i]->data = data;
109 skb_put(rnet->rx_skb[i], RIO_MAX_MSG_SIZE);
110 rnet->rx_skb[i]->protocol =
111 eth_type_trans(rnet->rx_skb[i], ndev);
112 error = __netif_rx(rnet->rx_skb[i]);
113
114 if (error == NET_RX_DROP) {
115 ndev->stats.rx_dropped++;
116 } else {
117 ndev->stats.rx_packets++;
118 ndev->stats.rx_bytes += RIO_MAX_MSG_SIZE;
119 }
120
121 } while ((i = (i + 1) % RIONET_RX_RING_SIZE) != rnet->rx_slot);
122
123 return i;
124}
125
126static void rionet_rx_fill(struct net_device *ndev, int end)
127{
128 int i;
129 struct rionet_private *rnet = netdev_priv(ndev);
130
131 i = rnet->rx_slot;
132 do {
133 rnet->rx_skb[i] = dev_alloc_skb(RIO_MAX_MSG_SIZE);
134
135 if (!rnet->rx_skb[i])
136 break;
137
138 rio_add_inb_buffer(rnet->mport, RIONET_MAILBOX,
139 rnet->rx_skb[i]->data);
140 } while ((i = (i + 1) % RIONET_RX_RING_SIZE) != end);
141
142 rnet->rx_slot = i;
143}
144
145static int rionet_queue_tx_msg(struct sk_buff *skb, struct net_device *ndev,
146 struct rio_dev *rdev)
147{
148 struct rionet_private *rnet = netdev_priv(ndev);
149
150 rio_add_outb_message(rnet->mport, rdev, 0, skb->data, skb->len);
151 rnet->tx_skb[rnet->tx_slot] = skb;
152
153 ndev->stats.tx_packets++;
154 ndev->stats.tx_bytes += skb->len;
155
156 if (++rnet->tx_cnt == RIONET_TX_RING_SIZE)
157 netif_stop_queue(ndev);
158
159 ++rnet->tx_slot;
160 rnet->tx_slot &= (RIONET_TX_RING_SIZE - 1);
161
162 if (netif_msg_tx_queued(rnet))
163 printk(KERN_INFO "%s: queued skb len %8.8x\n", DRV_NAME,
164 skb->len);
165
166 return 0;
167}
168
169static netdev_tx_t rionet_start_xmit(struct sk_buff *skb,
170 struct net_device *ndev)
171{
172 int i;
173 struct rionet_private *rnet = netdev_priv(ndev);
174 struct ethhdr *eth = (struct ethhdr *)skb->data;
175 u16 destid;
176 unsigned long flags;
177 int add_num = 1;
178
179 spin_lock_irqsave(&rnet->tx_lock, flags);
180
181 if (is_multicast_ether_addr(eth->h_dest))
182 add_num = nets[rnet->mport->id].nact;
183
184 if ((rnet->tx_cnt + add_num) > RIONET_TX_RING_SIZE) {
185 netif_stop_queue(ndev);
186 spin_unlock_irqrestore(&rnet->tx_lock, flags);
187 printk(KERN_ERR "%s: BUG! Tx Ring full when queue awake!\n",
188 ndev->name);
189 return NETDEV_TX_BUSY;
190 }
191
192 if (is_multicast_ether_addr(eth->h_dest)) {
193 int count = 0;
194
195 for (i = 0; i < RIO_MAX_ROUTE_ENTRIES(rnet->mport->sys_size);
196 i++)
197 if (nets[rnet->mport->id].active[i]) {
198 rionet_queue_tx_msg(skb, ndev,
199 nets[rnet->mport->id].active[i]);
200 if (count)
201 refcount_inc(&skb->users);
202 count++;
203 }
204 } else if (RIONET_MAC_MATCH(eth->h_dest)) {
205 destid = RIONET_GET_DESTID(eth->h_dest);
206 if (nets[rnet->mport->id].active[destid])
207 rionet_queue_tx_msg(skb, ndev,
208 nets[rnet->mport->id].active[destid]);
209 else {
210 /*
211 * If the target device was removed from the list of
212 * active peers but we still have TX packets targeting
213 * it just report sending a packet to the target
214 * (without actual packet transfer).
215 */
216 ndev->stats.tx_packets++;
217 ndev->stats.tx_bytes += skb->len;
218 dev_kfree_skb_any(skb);
219 }
220 }
221
222 spin_unlock_irqrestore(&rnet->tx_lock, flags);
223
224 return NETDEV_TX_OK;
225}
226
227static void rionet_dbell_event(struct rio_mport *mport, void *dev_id, u16 sid, u16 tid,
228 u16 info)
229{
230 struct net_device *ndev = dev_id;
231 struct rionet_private *rnet = netdev_priv(ndev);
232 struct rionet_peer *peer;
233 unsigned char netid = rnet->mport->id;
234
235 if (netif_msg_intr(rnet))
236 printk(KERN_INFO "%s: doorbell sid %4.4x tid %4.4x info %4.4x",
237 DRV_NAME, sid, tid, info);
238 if (info == RIONET_DOORBELL_JOIN) {
239 if (!nets[netid].active[sid]) {
240 spin_lock(&nets[netid].lock);
241 list_for_each_entry(peer, &nets[netid].peers, node) {
242 if (peer->rdev->destid == sid) {
243 nets[netid].active[sid] = peer->rdev;
244 nets[netid].nact++;
245 }
246 }
247 spin_unlock(&nets[netid].lock);
248
249 rio_mport_send_doorbell(mport, sid,
250 RIONET_DOORBELL_JOIN);
251 }
252 } else if (info == RIONET_DOORBELL_LEAVE) {
253 spin_lock(&nets[netid].lock);
254 if (nets[netid].active[sid]) {
255 nets[netid].active[sid] = NULL;
256 nets[netid].nact--;
257 }
258 spin_unlock(&nets[netid].lock);
259 } else {
260 if (netif_msg_intr(rnet))
261 printk(KERN_WARNING "%s: unhandled doorbell\n",
262 DRV_NAME);
263 }
264}
265
266static void rionet_inb_msg_event(struct rio_mport *mport, void *dev_id, int mbox, int slot)
267{
268 int n;
269 struct net_device *ndev = dev_id;
270 struct rionet_private *rnet = netdev_priv(ndev);
271
272 if (netif_msg_intr(rnet))
273 printk(KERN_INFO "%s: inbound message event, mbox %d slot %d\n",
274 DRV_NAME, mbox, slot);
275
276 spin_lock(&rnet->lock);
277 if ((n = rionet_rx_clean(ndev)) != rnet->rx_slot)
278 rionet_rx_fill(ndev, n);
279 spin_unlock(&rnet->lock);
280}
281
282static void rionet_outb_msg_event(struct rio_mport *mport, void *dev_id, int mbox, int slot)
283{
284 struct net_device *ndev = dev_id;
285 struct rionet_private *rnet = netdev_priv(ndev);
286
287 spin_lock(&rnet->tx_lock);
288
289 if (netif_msg_intr(rnet))
290 printk(KERN_INFO
291 "%s: outbound message event, mbox %d slot %d\n",
292 DRV_NAME, mbox, slot);
293
294 while (rnet->tx_cnt && (rnet->ack_slot != slot)) {
295 /* dma unmap single */
296 dev_kfree_skb_irq(rnet->tx_skb[rnet->ack_slot]);
297 rnet->tx_skb[rnet->ack_slot] = NULL;
298 ++rnet->ack_slot;
299 rnet->ack_slot &= (RIONET_TX_RING_SIZE - 1);
300 rnet->tx_cnt--;
301 }
302
303 if (rnet->tx_cnt < RIONET_TX_RING_SIZE)
304 netif_wake_queue(ndev);
305
306 spin_unlock(&rnet->tx_lock);
307}
308
309static int rionet_open(struct net_device *ndev)
310{
311 int i, rc = 0;
312 struct rionet_peer *peer;
313 struct rionet_private *rnet = netdev_priv(ndev);
314 unsigned char netid = rnet->mport->id;
315 unsigned long flags;
316
317 if (netif_msg_ifup(rnet))
318 printk(KERN_INFO "%s: open\n", DRV_NAME);
319
320 if ((rc = rio_request_inb_dbell(rnet->mport,
321 (void *)ndev,
322 RIONET_DOORBELL_JOIN,
323 RIONET_DOORBELL_LEAVE,
324 rionet_dbell_event)) < 0)
325 goto out;
326
327 if ((rc = rio_request_inb_mbox(rnet->mport,
328 (void *)ndev,
329 RIONET_MAILBOX,
330 RIONET_RX_RING_SIZE,
331 rionet_inb_msg_event)) < 0)
332 goto out;
333
334 if ((rc = rio_request_outb_mbox(rnet->mport,
335 (void *)ndev,
336 RIONET_MAILBOX,
337 RIONET_TX_RING_SIZE,
338 rionet_outb_msg_event)) < 0)
339 goto out;
340
341 /* Initialize inbound message ring */
342 for (i = 0; i < RIONET_RX_RING_SIZE; i++)
343 rnet->rx_skb[i] = NULL;
344 rnet->rx_slot = 0;
345 rionet_rx_fill(ndev, 0);
346
347 rnet->tx_slot = 0;
348 rnet->tx_cnt = 0;
349 rnet->ack_slot = 0;
350
351 netif_carrier_on(ndev);
352 netif_start_queue(ndev);
353
354 spin_lock_irqsave(&nets[netid].lock, flags);
355 list_for_each_entry(peer, &nets[netid].peers, node) {
356 /* Send a join message */
357 rio_send_doorbell(peer->rdev, RIONET_DOORBELL_JOIN);
358 }
359 spin_unlock_irqrestore(&nets[netid].lock, flags);
360 rnet->open = true;
361
362 out:
363 return rc;
364}
365
366static int rionet_close(struct net_device *ndev)
367{
368 struct rionet_private *rnet = netdev_priv(ndev);
369 struct rionet_peer *peer;
370 unsigned char netid = rnet->mport->id;
371 unsigned long flags;
372 int i;
373
374 if (netif_msg_ifup(rnet))
375 printk(KERN_INFO "%s: close %s\n", DRV_NAME, ndev->name);
376
377 netif_stop_queue(ndev);
378 netif_carrier_off(ndev);
379 rnet->open = false;
380
381 for (i = 0; i < RIONET_RX_RING_SIZE; i++)
382 kfree_skb(rnet->rx_skb[i]);
383
384 spin_lock_irqsave(&nets[netid].lock, flags);
385 list_for_each_entry(peer, &nets[netid].peers, node) {
386 if (nets[netid].active[peer->rdev->destid]) {
387 rio_send_doorbell(peer->rdev, RIONET_DOORBELL_LEAVE);
388 nets[netid].active[peer->rdev->destid] = NULL;
389 }
390 if (peer->res)
391 rio_release_outb_dbell(peer->rdev, peer->res);
392 }
393 spin_unlock_irqrestore(&nets[netid].lock, flags);
394
395 rio_release_inb_dbell(rnet->mport, RIONET_DOORBELL_JOIN,
396 RIONET_DOORBELL_LEAVE);
397 rio_release_inb_mbox(rnet->mport, RIONET_MAILBOX);
398 rio_release_outb_mbox(rnet->mport, RIONET_MAILBOX);
399
400 return 0;
401}
402
403static void rionet_remove_dev(struct device *dev, struct subsys_interface *sif)
404{
405 struct rio_dev *rdev = to_rio_dev(dev);
406 unsigned char netid = rdev->net->hport->id;
407 struct rionet_peer *peer;
408 int state, found = 0;
409 unsigned long flags;
410
411 if (!dev_rionet_capable(rdev))
412 return;
413
414 spin_lock_irqsave(&nets[netid].lock, flags);
415 list_for_each_entry(peer, &nets[netid].peers, node) {
416 if (peer->rdev == rdev) {
417 list_del(&peer->node);
418 if (nets[netid].active[rdev->destid]) {
419 state = atomic_read(&rdev->state);
420 if (state != RIO_DEVICE_GONE &&
421 state != RIO_DEVICE_INITIALIZING) {
422 rio_send_doorbell(rdev,
423 RIONET_DOORBELL_LEAVE);
424 }
425 nets[netid].active[rdev->destid] = NULL;
426 nets[netid].nact--;
427 }
428 found = 1;
429 break;
430 }
431 }
432 spin_unlock_irqrestore(&nets[netid].lock, flags);
433
434 if (found) {
435 if (peer->res)
436 rio_release_outb_dbell(rdev, peer->res);
437 kfree(peer);
438 }
439}
440
441static void rionet_get_drvinfo(struct net_device *ndev,
442 struct ethtool_drvinfo *info)
443{
444 struct rionet_private *rnet = netdev_priv(ndev);
445
446 strscpy(info->driver, DRV_NAME, sizeof(info->driver));
447 strscpy(info->version, DRV_VERSION, sizeof(info->version));
448 strscpy(info->fw_version, "n/a", sizeof(info->fw_version));
449 strscpy(info->bus_info, rnet->mport->name, sizeof(info->bus_info));
450}
451
452static u32 rionet_get_msglevel(struct net_device *ndev)
453{
454 struct rionet_private *rnet = netdev_priv(ndev);
455
456 return rnet->msg_enable;
457}
458
459static void rionet_set_msglevel(struct net_device *ndev, u32 value)
460{
461 struct rionet_private *rnet = netdev_priv(ndev);
462
463 rnet->msg_enable = value;
464}
465
466static const struct ethtool_ops rionet_ethtool_ops = {
467 .get_drvinfo = rionet_get_drvinfo,
468 .get_msglevel = rionet_get_msglevel,
469 .set_msglevel = rionet_set_msglevel,
470 .get_link = ethtool_op_get_link,
471};
472
473static const struct net_device_ops rionet_netdev_ops = {
474 .ndo_open = rionet_open,
475 .ndo_stop = rionet_close,
476 .ndo_start_xmit = rionet_start_xmit,
477 .ndo_validate_addr = eth_validate_addr,
478 .ndo_set_mac_address = eth_mac_addr,
479};
480
481static int rionet_setup_netdev(struct rio_mport *mport, struct net_device *ndev)
482{
483 int rc = 0;
484 struct rionet_private *rnet;
485 u8 addr[ETH_ALEN];
486 u16 device_id;
487 const size_t rionet_active_bytes = sizeof(void *) *
488 RIO_MAX_ROUTE_ENTRIES(mport->sys_size);
489
490 nets[mport->id].active = (struct rio_dev **)__get_free_pages(GFP_KERNEL,
491 get_order(rionet_active_bytes));
492 if (!nets[mport->id].active) {
493 rc = -ENOMEM;
494 goto out;
495 }
496 memset((void *)nets[mport->id].active, 0, rionet_active_bytes);
497
498 /* Set up private area */
499 rnet = netdev_priv(ndev);
500 rnet->mport = mport;
501 rnet->open = false;
502
503 /* Set the default MAC address */
504 device_id = rio_local_get_device_id(mport);
505 addr[0] = 0x00;
506 addr[1] = 0x01;
507 addr[2] = 0x00;
508 addr[3] = 0x01;
509 addr[4] = device_id >> 8;
510 addr[5] = device_id & 0xff;
511 eth_hw_addr_set(ndev, addr);
512
513 ndev->netdev_ops = &rionet_netdev_ops;
514 ndev->mtu = RIONET_MAX_MTU;
515 /* MTU range: 68 - 4082 */
516 ndev->min_mtu = ETH_MIN_MTU;
517 ndev->max_mtu = RIONET_MAX_MTU;
518 ndev->features = NETIF_F_LLTX;
519 SET_NETDEV_DEV(ndev, &mport->dev);
520 ndev->ethtool_ops = &rionet_ethtool_ops;
521
522 spin_lock_init(&rnet->lock);
523 spin_lock_init(&rnet->tx_lock);
524
525 rnet->msg_enable = RIONET_DEFAULT_MSGLEVEL;
526
527 rc = register_netdev(ndev);
528 if (rc != 0) {
529 free_pages((unsigned long)nets[mport->id].active,
530 get_order(rionet_active_bytes));
531 goto out;
532 }
533
534 printk(KERN_INFO "%s: %s %s Version %s, MAC %pM, %s\n",
535 ndev->name,
536 DRV_NAME,
537 DRV_DESC,
538 DRV_VERSION,
539 ndev->dev_addr,
540 mport->name);
541
542 out:
543 return rc;
544}
545
546static int rionet_add_dev(struct device *dev, struct subsys_interface *sif)
547{
548 int rc = -ENODEV;
549 u32 lsrc_ops, ldst_ops;
550 struct rionet_peer *peer;
551 struct net_device *ndev = NULL;
552 struct rio_dev *rdev = to_rio_dev(dev);
553 unsigned char netid = rdev->net->hport->id;
554
555 if (netid >= RIONET_MAX_NETS)
556 return rc;
557
558 /*
559 * If first time through this net, make sure local device is rionet
560 * capable and setup netdev (this step will be skipped in later probes
561 * on the same net).
562 */
563 if (!nets[netid].ndev) {
564 rio_local_read_config_32(rdev->net->hport, RIO_SRC_OPS_CAR,
565 &lsrc_ops);
566 rio_local_read_config_32(rdev->net->hport, RIO_DST_OPS_CAR,
567 &ldst_ops);
568 if (!is_rionet_capable(lsrc_ops, ldst_ops)) {
569 printk(KERN_ERR
570 "%s: local device %s is not network capable\n",
571 DRV_NAME, rdev->net->hport->name);
572 goto out;
573 }
574
575 /* Allocate our net_device structure */
576 ndev = alloc_etherdev(sizeof(struct rionet_private));
577 if (ndev == NULL) {
578 rc = -ENOMEM;
579 goto out;
580 }
581
582 rc = rionet_setup_netdev(rdev->net->hport, ndev);
583 if (rc) {
584 printk(KERN_ERR "%s: failed to setup netdev (rc=%d)\n",
585 DRV_NAME, rc);
586 free_netdev(ndev);
587 goto out;
588 }
589
590 INIT_LIST_HEAD(&nets[netid].peers);
591 spin_lock_init(&nets[netid].lock);
592 nets[netid].nact = 0;
593 nets[netid].ndev = ndev;
594 }
595
596 /*
597 * If the remote device has mailbox/doorbell capabilities,
598 * add it to the peer list.
599 */
600 if (dev_rionet_capable(rdev)) {
601 struct rionet_private *rnet;
602 unsigned long flags;
603
604 rnet = netdev_priv(nets[netid].ndev);
605
606 peer = kzalloc(sizeof(*peer), GFP_KERNEL);
607 if (!peer) {
608 rc = -ENOMEM;
609 goto out;
610 }
611 peer->rdev = rdev;
612 peer->res = rio_request_outb_dbell(peer->rdev,
613 RIONET_DOORBELL_JOIN,
614 RIONET_DOORBELL_LEAVE);
615 if (!peer->res) {
616 pr_err("%s: error requesting doorbells\n", DRV_NAME);
617 kfree(peer);
618 rc = -ENOMEM;
619 goto out;
620 }
621
622 spin_lock_irqsave(&nets[netid].lock, flags);
623 list_add_tail(&peer->node, &nets[netid].peers);
624 spin_unlock_irqrestore(&nets[netid].lock, flags);
625 pr_debug("%s: %s add peer %s\n",
626 DRV_NAME, __func__, rio_name(rdev));
627
628 /* If netdev is already opened, send join request to new peer */
629 if (rnet->open)
630 rio_send_doorbell(peer->rdev, RIONET_DOORBELL_JOIN);
631 }
632
633 return 0;
634out:
635 return rc;
636}
637
638static int rionet_shutdown(struct notifier_block *nb, unsigned long code,
639 void *unused)
640{
641 struct rionet_peer *peer;
642 unsigned long flags;
643 int i;
644
645 pr_debug("%s: %s\n", DRV_NAME, __func__);
646
647 for (i = 0; i < RIONET_MAX_NETS; i++) {
648 if (!nets[i].ndev)
649 continue;
650
651 spin_lock_irqsave(&nets[i].lock, flags);
652 list_for_each_entry(peer, &nets[i].peers, node) {
653 if (nets[i].active[peer->rdev->destid]) {
654 rio_send_doorbell(peer->rdev,
655 RIONET_DOORBELL_LEAVE);
656 nets[i].active[peer->rdev->destid] = NULL;
657 }
658 }
659 spin_unlock_irqrestore(&nets[i].lock, flags);
660 }
661
662 return NOTIFY_DONE;
663}
664
665static void rionet_remove_mport(struct device *dev)
666{
667 struct rio_mport *mport = to_rio_mport(dev);
668 struct net_device *ndev;
669 int id = mport->id;
670
671 pr_debug("%s %s\n", __func__, mport->name);
672
673 WARN(nets[id].nact, "%s called when connected to %d peers\n",
674 __func__, nets[id].nact);
675 WARN(!nets[id].ndev, "%s called for mport without NDEV\n",
676 __func__);
677
678 if (nets[id].ndev) {
679 ndev = nets[id].ndev;
680 netif_stop_queue(ndev);
681 unregister_netdev(ndev);
682
683 free_pages((unsigned long)nets[id].active,
684 get_order(sizeof(void *) *
685 RIO_MAX_ROUTE_ENTRIES(mport->sys_size)));
686 nets[id].active = NULL;
687 free_netdev(ndev);
688 nets[id].ndev = NULL;
689 }
690}
691
692#ifdef MODULE
693static struct rio_device_id rionet_id_table[] = {
694 {RIO_DEVICE(RIO_ANY_ID, RIO_ANY_ID)},
695 { 0, } /* terminate list */
696};
697
698MODULE_DEVICE_TABLE(rapidio, rionet_id_table);
699#endif
700
701static struct subsys_interface rionet_interface = {
702 .name = "rionet",
703 .subsys = &rio_bus_type,
704 .add_dev = rionet_add_dev,
705 .remove_dev = rionet_remove_dev,
706};
707
708static struct notifier_block rionet_notifier = {
709 .notifier_call = rionet_shutdown,
710};
711
712/* the rio_mport_interface is used to handle local mport devices */
713static struct class_interface rio_mport_interface __refdata = {
714 .class = &rio_mport_class,
715 .add_dev = NULL,
716 .remove_dev = rionet_remove_mport,
717};
718
719static int __init rionet_init(void)
720{
721 int ret;
722
723 ret = register_reboot_notifier(&rionet_notifier);
724 if (ret) {
725 pr_err("%s: failed to register reboot notifier (err=%d)\n",
726 DRV_NAME, ret);
727 return ret;
728 }
729
730 ret = class_interface_register(&rio_mport_interface);
731 if (ret) {
732 pr_err("%s: class_interface_register error: %d\n",
733 DRV_NAME, ret);
734 return ret;
735 }
736
737 return subsys_interface_register(&rionet_interface);
738}
739
740static void __exit rionet_exit(void)
741{
742 unregister_reboot_notifier(&rionet_notifier);
743 subsys_interface_unregister(&rionet_interface);
744 class_interface_unregister(&rio_mport_interface);
745}
746
747late_initcall(rionet_init);
748module_exit(rionet_exit);
1/*
2 * rionet - Ethernet driver over RapidIO messaging services
3 *
4 * Copyright 2005 MontaVista Software, Inc.
5 * Matt Porter <mporter@kernel.crashing.org>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
11 */
12
13#include <linux/module.h>
14#include <linux/kernel.h>
15#include <linux/dma-mapping.h>
16#include <linux/delay.h>
17#include <linux/rio.h>
18#include <linux/rio_drv.h>
19#include <linux/slab.h>
20#include <linux/rio_ids.h>
21
22#include <linux/netdevice.h>
23#include <linux/etherdevice.h>
24#include <linux/skbuff.h>
25#include <linux/crc32.h>
26#include <linux/ethtool.h>
27
28#define DRV_NAME "rionet"
29#define DRV_VERSION "0.3"
30#define DRV_AUTHOR "Matt Porter <mporter@kernel.crashing.org>"
31#define DRV_DESC "Ethernet over RapidIO"
32
33MODULE_AUTHOR(DRV_AUTHOR);
34MODULE_DESCRIPTION(DRV_DESC);
35MODULE_LICENSE("GPL");
36
37#define RIONET_DEFAULT_MSGLEVEL \
38 (NETIF_MSG_DRV | \
39 NETIF_MSG_LINK | \
40 NETIF_MSG_RX_ERR | \
41 NETIF_MSG_TX_ERR)
42
43#define RIONET_DOORBELL_JOIN 0x1000
44#define RIONET_DOORBELL_LEAVE 0x1001
45
46#define RIONET_MAILBOX 0
47
48#define RIONET_TX_RING_SIZE CONFIG_RIONET_TX_SIZE
49#define RIONET_RX_RING_SIZE CONFIG_RIONET_RX_SIZE
50#define RIONET_MAX_NETS 8
51
52struct rionet_private {
53 struct rio_mport *mport;
54 struct sk_buff *rx_skb[RIONET_RX_RING_SIZE];
55 struct sk_buff *tx_skb[RIONET_TX_RING_SIZE];
56 int rx_slot;
57 int tx_slot;
58 int tx_cnt;
59 int ack_slot;
60 spinlock_t lock;
61 spinlock_t tx_lock;
62 u32 msg_enable;
63};
64
65struct rionet_peer {
66 struct list_head node;
67 struct rio_dev *rdev;
68 struct resource *res;
69};
70
71struct rionet_net {
72 struct net_device *ndev;
73 struct list_head peers;
74 struct rio_dev **active;
75 int nact; /* number of active peers */
76};
77
78static struct rionet_net nets[RIONET_MAX_NETS];
79
80#define is_rionet_capable(src_ops, dst_ops) \
81 ((src_ops & RIO_SRC_OPS_DATA_MSG) && \
82 (dst_ops & RIO_DST_OPS_DATA_MSG) && \
83 (src_ops & RIO_SRC_OPS_DOORBELL) && \
84 (dst_ops & RIO_DST_OPS_DOORBELL))
85#define dev_rionet_capable(dev) \
86 is_rionet_capable(dev->src_ops, dev->dst_ops)
87
88#define RIONET_MAC_MATCH(x) (!memcmp((x), "\00\01\00\01", 4))
89#define RIONET_GET_DESTID(x) ((*((u8 *)x + 4) << 8) | *((u8 *)x + 5))
90
91static int rionet_rx_clean(struct net_device *ndev)
92{
93 int i;
94 int error = 0;
95 struct rionet_private *rnet = netdev_priv(ndev);
96 void *data;
97
98 i = rnet->rx_slot;
99
100 do {
101 if (!rnet->rx_skb[i])
102 continue;
103
104 if (!(data = rio_get_inb_message(rnet->mport, RIONET_MAILBOX)))
105 break;
106
107 rnet->rx_skb[i]->data = data;
108 skb_put(rnet->rx_skb[i], RIO_MAX_MSG_SIZE);
109 rnet->rx_skb[i]->protocol =
110 eth_type_trans(rnet->rx_skb[i], ndev);
111 error = netif_rx(rnet->rx_skb[i]);
112
113 if (error == NET_RX_DROP) {
114 ndev->stats.rx_dropped++;
115 } else {
116 ndev->stats.rx_packets++;
117 ndev->stats.rx_bytes += RIO_MAX_MSG_SIZE;
118 }
119
120 } while ((i = (i + 1) % RIONET_RX_RING_SIZE) != rnet->rx_slot);
121
122 return i;
123}
124
125static void rionet_rx_fill(struct net_device *ndev, int end)
126{
127 int i;
128 struct rionet_private *rnet = netdev_priv(ndev);
129
130 i = rnet->rx_slot;
131 do {
132 rnet->rx_skb[i] = dev_alloc_skb(RIO_MAX_MSG_SIZE);
133
134 if (!rnet->rx_skb[i])
135 break;
136
137 rio_add_inb_buffer(rnet->mport, RIONET_MAILBOX,
138 rnet->rx_skb[i]->data);
139 } while ((i = (i + 1) % RIONET_RX_RING_SIZE) != end);
140
141 rnet->rx_slot = i;
142}
143
144static int rionet_queue_tx_msg(struct sk_buff *skb, struct net_device *ndev,
145 struct rio_dev *rdev)
146{
147 struct rionet_private *rnet = netdev_priv(ndev);
148
149 rio_add_outb_message(rnet->mport, rdev, 0, skb->data, skb->len);
150 rnet->tx_skb[rnet->tx_slot] = skb;
151
152 ndev->stats.tx_packets++;
153 ndev->stats.tx_bytes += skb->len;
154
155 if (++rnet->tx_cnt == RIONET_TX_RING_SIZE)
156 netif_stop_queue(ndev);
157
158 ++rnet->tx_slot;
159 rnet->tx_slot &= (RIONET_TX_RING_SIZE - 1);
160
161 if (netif_msg_tx_queued(rnet))
162 printk(KERN_INFO "%s: queued skb len %8.8x\n", DRV_NAME,
163 skb->len);
164
165 return 0;
166}
167
168static int rionet_start_xmit(struct sk_buff *skb, struct net_device *ndev)
169{
170 int i;
171 struct rionet_private *rnet = netdev_priv(ndev);
172 struct ethhdr *eth = (struct ethhdr *)skb->data;
173 u16 destid;
174 unsigned long flags;
175 int add_num = 1;
176
177 local_irq_save(flags);
178 if (!spin_trylock(&rnet->tx_lock)) {
179 local_irq_restore(flags);
180 return NETDEV_TX_LOCKED;
181 }
182
183 if (is_multicast_ether_addr(eth->h_dest))
184 add_num = nets[rnet->mport->id].nact;
185
186 if ((rnet->tx_cnt + add_num) > RIONET_TX_RING_SIZE) {
187 netif_stop_queue(ndev);
188 spin_unlock_irqrestore(&rnet->tx_lock, flags);
189 printk(KERN_ERR "%s: BUG! Tx Ring full when queue awake!\n",
190 ndev->name);
191 return NETDEV_TX_BUSY;
192 }
193
194 if (is_multicast_ether_addr(eth->h_dest)) {
195 int count = 0;
196
197 for (i = 0; i < RIO_MAX_ROUTE_ENTRIES(rnet->mport->sys_size);
198 i++)
199 if (nets[rnet->mport->id].active[i]) {
200 rionet_queue_tx_msg(skb, ndev,
201 nets[rnet->mport->id].active[i]);
202 if (count)
203 atomic_inc(&skb->users);
204 count++;
205 }
206 } else if (RIONET_MAC_MATCH(eth->h_dest)) {
207 destid = RIONET_GET_DESTID(eth->h_dest);
208 if (nets[rnet->mport->id].active[destid])
209 rionet_queue_tx_msg(skb, ndev,
210 nets[rnet->mport->id].active[destid]);
211 else {
212 /*
213 * If the target device was removed from the list of
214 * active peers but we still have TX packets targeting
215 * it just report sending a packet to the target
216 * (without actual packet transfer).
217 */
218 dev_kfree_skb_any(skb);
219 ndev->stats.tx_packets++;
220 ndev->stats.tx_bytes += skb->len;
221 }
222 }
223
224 spin_unlock_irqrestore(&rnet->tx_lock, flags);
225
226 return NETDEV_TX_OK;
227}
228
229static void rionet_dbell_event(struct rio_mport *mport, void *dev_id, u16 sid, u16 tid,
230 u16 info)
231{
232 struct net_device *ndev = dev_id;
233 struct rionet_private *rnet = netdev_priv(ndev);
234 struct rionet_peer *peer;
235
236 if (netif_msg_intr(rnet))
237 printk(KERN_INFO "%s: doorbell sid %4.4x tid %4.4x info %4.4x",
238 DRV_NAME, sid, tid, info);
239 if (info == RIONET_DOORBELL_JOIN) {
240 if (!nets[rnet->mport->id].active[sid]) {
241 list_for_each_entry(peer,
242 &nets[rnet->mport->id].peers, node) {
243 if (peer->rdev->destid == sid) {
244 nets[rnet->mport->id].active[sid] =
245 peer->rdev;
246 nets[rnet->mport->id].nact++;
247 }
248 }
249 rio_mport_send_doorbell(mport, sid,
250 RIONET_DOORBELL_JOIN);
251 }
252 } else if (info == RIONET_DOORBELL_LEAVE) {
253 nets[rnet->mport->id].active[sid] = NULL;
254 nets[rnet->mport->id].nact--;
255 } else {
256 if (netif_msg_intr(rnet))
257 printk(KERN_WARNING "%s: unhandled doorbell\n",
258 DRV_NAME);
259 }
260}
261
262static void rionet_inb_msg_event(struct rio_mport *mport, void *dev_id, int mbox, int slot)
263{
264 int n;
265 struct net_device *ndev = dev_id;
266 struct rionet_private *rnet = netdev_priv(ndev);
267
268 if (netif_msg_intr(rnet))
269 printk(KERN_INFO "%s: inbound message event, mbox %d slot %d\n",
270 DRV_NAME, mbox, slot);
271
272 spin_lock(&rnet->lock);
273 if ((n = rionet_rx_clean(ndev)) != rnet->rx_slot)
274 rionet_rx_fill(ndev, n);
275 spin_unlock(&rnet->lock);
276}
277
278static void rionet_outb_msg_event(struct rio_mport *mport, void *dev_id, int mbox, int slot)
279{
280 struct net_device *ndev = dev_id;
281 struct rionet_private *rnet = netdev_priv(ndev);
282
283 spin_lock(&rnet->lock);
284
285 if (netif_msg_intr(rnet))
286 printk(KERN_INFO
287 "%s: outbound message event, mbox %d slot %d\n",
288 DRV_NAME, mbox, slot);
289
290 while (rnet->tx_cnt && (rnet->ack_slot != slot)) {
291 /* dma unmap single */
292 dev_kfree_skb_irq(rnet->tx_skb[rnet->ack_slot]);
293 rnet->tx_skb[rnet->ack_slot] = NULL;
294 ++rnet->ack_slot;
295 rnet->ack_slot &= (RIONET_TX_RING_SIZE - 1);
296 rnet->tx_cnt--;
297 }
298
299 if (rnet->tx_cnt < RIONET_TX_RING_SIZE)
300 netif_wake_queue(ndev);
301
302 spin_unlock(&rnet->lock);
303}
304
305static int rionet_open(struct net_device *ndev)
306{
307 int i, rc = 0;
308 struct rionet_peer *peer, *tmp;
309 struct rionet_private *rnet = netdev_priv(ndev);
310
311 if (netif_msg_ifup(rnet))
312 printk(KERN_INFO "%s: open\n", DRV_NAME);
313
314 if ((rc = rio_request_inb_dbell(rnet->mport,
315 (void *)ndev,
316 RIONET_DOORBELL_JOIN,
317 RIONET_DOORBELL_LEAVE,
318 rionet_dbell_event)) < 0)
319 goto out;
320
321 if ((rc = rio_request_inb_mbox(rnet->mport,
322 (void *)ndev,
323 RIONET_MAILBOX,
324 RIONET_RX_RING_SIZE,
325 rionet_inb_msg_event)) < 0)
326 goto out;
327
328 if ((rc = rio_request_outb_mbox(rnet->mport,
329 (void *)ndev,
330 RIONET_MAILBOX,
331 RIONET_TX_RING_SIZE,
332 rionet_outb_msg_event)) < 0)
333 goto out;
334
335 /* Initialize inbound message ring */
336 for (i = 0; i < RIONET_RX_RING_SIZE; i++)
337 rnet->rx_skb[i] = NULL;
338 rnet->rx_slot = 0;
339 rionet_rx_fill(ndev, 0);
340
341 rnet->tx_slot = 0;
342 rnet->tx_cnt = 0;
343 rnet->ack_slot = 0;
344
345 netif_carrier_on(ndev);
346 netif_start_queue(ndev);
347
348 list_for_each_entry_safe(peer, tmp,
349 &nets[rnet->mport->id].peers, node) {
350 if (!(peer->res = rio_request_outb_dbell(peer->rdev,
351 RIONET_DOORBELL_JOIN,
352 RIONET_DOORBELL_LEAVE)))
353 {
354 printk(KERN_ERR "%s: error requesting doorbells\n",
355 DRV_NAME);
356 continue;
357 }
358
359 /* Send a join message */
360 rio_send_doorbell(peer->rdev, RIONET_DOORBELL_JOIN);
361 }
362
363 out:
364 return rc;
365}
366
367static int rionet_close(struct net_device *ndev)
368{
369 struct rionet_private *rnet = netdev_priv(ndev);
370 struct rionet_peer *peer, *tmp;
371 int i;
372
373 if (netif_msg_ifup(rnet))
374 printk(KERN_INFO "%s: close %s\n", DRV_NAME, ndev->name);
375
376 netif_stop_queue(ndev);
377 netif_carrier_off(ndev);
378
379 for (i = 0; i < RIONET_RX_RING_SIZE; i++)
380 kfree_skb(rnet->rx_skb[i]);
381
382 list_for_each_entry_safe(peer, tmp,
383 &nets[rnet->mport->id].peers, node) {
384 if (nets[rnet->mport->id].active[peer->rdev->destid]) {
385 rio_send_doorbell(peer->rdev, RIONET_DOORBELL_LEAVE);
386 nets[rnet->mport->id].active[peer->rdev->destid] = NULL;
387 }
388 rio_release_outb_dbell(peer->rdev, peer->res);
389 }
390
391 rio_release_inb_dbell(rnet->mport, RIONET_DOORBELL_JOIN,
392 RIONET_DOORBELL_LEAVE);
393 rio_release_inb_mbox(rnet->mport, RIONET_MAILBOX);
394 rio_release_outb_mbox(rnet->mport, RIONET_MAILBOX);
395
396 return 0;
397}
398
399static int rionet_remove_dev(struct device *dev, struct subsys_interface *sif)
400{
401 struct rio_dev *rdev = to_rio_dev(dev);
402 unsigned char netid = rdev->net->hport->id;
403 struct rionet_peer *peer, *tmp;
404
405 if (dev_rionet_capable(rdev)) {
406 list_for_each_entry_safe(peer, tmp, &nets[netid].peers, node) {
407 if (peer->rdev == rdev) {
408 if (nets[netid].active[rdev->destid]) {
409 nets[netid].active[rdev->destid] = NULL;
410 nets[netid].nact--;
411 }
412
413 list_del(&peer->node);
414 kfree(peer);
415 break;
416 }
417 }
418 }
419
420 return 0;
421}
422
423static void rionet_get_drvinfo(struct net_device *ndev,
424 struct ethtool_drvinfo *info)
425{
426 struct rionet_private *rnet = netdev_priv(ndev);
427
428 strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
429 strlcpy(info->version, DRV_VERSION, sizeof(info->version));
430 strlcpy(info->fw_version, "n/a", sizeof(info->fw_version));
431 strlcpy(info->bus_info, rnet->mport->name, sizeof(info->bus_info));
432}
433
434static u32 rionet_get_msglevel(struct net_device *ndev)
435{
436 struct rionet_private *rnet = netdev_priv(ndev);
437
438 return rnet->msg_enable;
439}
440
441static void rionet_set_msglevel(struct net_device *ndev, u32 value)
442{
443 struct rionet_private *rnet = netdev_priv(ndev);
444
445 rnet->msg_enable = value;
446}
447
448static const struct ethtool_ops rionet_ethtool_ops = {
449 .get_drvinfo = rionet_get_drvinfo,
450 .get_msglevel = rionet_get_msglevel,
451 .set_msglevel = rionet_set_msglevel,
452 .get_link = ethtool_op_get_link,
453};
454
455static const struct net_device_ops rionet_netdev_ops = {
456 .ndo_open = rionet_open,
457 .ndo_stop = rionet_close,
458 .ndo_start_xmit = rionet_start_xmit,
459 .ndo_change_mtu = eth_change_mtu,
460 .ndo_validate_addr = eth_validate_addr,
461 .ndo_set_mac_address = eth_mac_addr,
462};
463
464static int rionet_setup_netdev(struct rio_mport *mport, struct net_device *ndev)
465{
466 int rc = 0;
467 struct rionet_private *rnet;
468 u16 device_id;
469 const size_t rionet_active_bytes = sizeof(void *) *
470 RIO_MAX_ROUTE_ENTRIES(mport->sys_size);
471
472 nets[mport->id].active = (struct rio_dev **)__get_free_pages(GFP_KERNEL,
473 get_order(rionet_active_bytes));
474 if (!nets[mport->id].active) {
475 rc = -ENOMEM;
476 goto out;
477 }
478 memset((void *)nets[mport->id].active, 0, rionet_active_bytes);
479
480 /* Set up private area */
481 rnet = netdev_priv(ndev);
482 rnet->mport = mport;
483
484 /* Set the default MAC address */
485 device_id = rio_local_get_device_id(mport);
486 ndev->dev_addr[0] = 0x00;
487 ndev->dev_addr[1] = 0x01;
488 ndev->dev_addr[2] = 0x00;
489 ndev->dev_addr[3] = 0x01;
490 ndev->dev_addr[4] = device_id >> 8;
491 ndev->dev_addr[5] = device_id & 0xff;
492
493 ndev->netdev_ops = &rionet_netdev_ops;
494 ndev->mtu = RIO_MAX_MSG_SIZE - 14;
495 ndev->features = NETIF_F_LLTX;
496 SET_NETDEV_DEV(ndev, &mport->dev);
497 SET_ETHTOOL_OPS(ndev, &rionet_ethtool_ops);
498
499 spin_lock_init(&rnet->lock);
500 spin_lock_init(&rnet->tx_lock);
501
502 rnet->msg_enable = RIONET_DEFAULT_MSGLEVEL;
503
504 rc = register_netdev(ndev);
505 if (rc != 0)
506 goto out;
507
508 printk(KERN_INFO "%s: %s %s Version %s, MAC %pM, %s\n",
509 ndev->name,
510 DRV_NAME,
511 DRV_DESC,
512 DRV_VERSION,
513 ndev->dev_addr,
514 mport->name);
515
516 out:
517 return rc;
518}
519
520static unsigned long net_table[RIONET_MAX_NETS/sizeof(unsigned long) + 1];
521
522static int rionet_add_dev(struct device *dev, struct subsys_interface *sif)
523{
524 int rc = -ENODEV;
525 u32 lsrc_ops, ldst_ops;
526 struct rionet_peer *peer;
527 struct net_device *ndev = NULL;
528 struct rio_dev *rdev = to_rio_dev(dev);
529 unsigned char netid = rdev->net->hport->id;
530 int oldnet;
531
532 if (netid >= RIONET_MAX_NETS)
533 return rc;
534
535 oldnet = test_and_set_bit(netid, net_table);
536
537 /*
538 * If first time through this net, make sure local device is rionet
539 * capable and setup netdev (this step will be skipped in later probes
540 * on the same net).
541 */
542 if (!oldnet) {
543 rio_local_read_config_32(rdev->net->hport, RIO_SRC_OPS_CAR,
544 &lsrc_ops);
545 rio_local_read_config_32(rdev->net->hport, RIO_DST_OPS_CAR,
546 &ldst_ops);
547 if (!is_rionet_capable(lsrc_ops, ldst_ops)) {
548 printk(KERN_ERR
549 "%s: local device %s is not network capable\n",
550 DRV_NAME, rdev->net->hport->name);
551 goto out;
552 }
553
554 /* Allocate our net_device structure */
555 ndev = alloc_etherdev(sizeof(struct rionet_private));
556 if (ndev == NULL) {
557 rc = -ENOMEM;
558 goto out;
559 }
560 nets[netid].ndev = ndev;
561 rc = rionet_setup_netdev(rdev->net->hport, ndev);
562 if (rc) {
563 printk(KERN_ERR "%s: failed to setup netdev (rc=%d)\n",
564 DRV_NAME, rc);
565 goto out;
566 }
567
568 INIT_LIST_HEAD(&nets[netid].peers);
569 nets[netid].nact = 0;
570 } else if (nets[netid].ndev == NULL)
571 goto out;
572
573 /*
574 * If the remote device has mailbox/doorbell capabilities,
575 * add it to the peer list.
576 */
577 if (dev_rionet_capable(rdev)) {
578 if (!(peer = kmalloc(sizeof(struct rionet_peer), GFP_KERNEL))) {
579 rc = -ENOMEM;
580 goto out;
581 }
582 peer->rdev = rdev;
583 list_add_tail(&peer->node, &nets[netid].peers);
584 }
585
586 return 0;
587out:
588 return rc;
589}
590
591#ifdef MODULE
592static struct rio_device_id rionet_id_table[] = {
593 {RIO_DEVICE(RIO_ANY_ID, RIO_ANY_ID)},
594 { 0, } /* terminate list */
595};
596
597MODULE_DEVICE_TABLE(rapidio, rionet_id_table);
598#endif
599
600static struct subsys_interface rionet_interface = {
601 .name = "rionet",
602 .subsys = &rio_bus_type,
603 .add_dev = rionet_add_dev,
604 .remove_dev = rionet_remove_dev,
605};
606
607static int __init rionet_init(void)
608{
609 return subsys_interface_register(&rionet_interface);
610}
611
612static void __exit rionet_exit(void)
613{
614 struct rionet_private *rnet;
615 struct net_device *ndev;
616 struct rionet_peer *peer, *tmp;
617 int i;
618
619 for (i = 0; i < RIONET_MAX_NETS; i++) {
620 if (nets[i].ndev != NULL) {
621 ndev = nets[i].ndev;
622 rnet = netdev_priv(ndev);
623 unregister_netdev(ndev);
624
625 list_for_each_entry_safe(peer,
626 tmp, &nets[i].peers, node) {
627 list_del(&peer->node);
628 kfree(peer);
629 }
630
631 free_pages((unsigned long)nets[i].active,
632 get_order(sizeof(void *) *
633 RIO_MAX_ROUTE_ENTRIES(rnet->mport->sys_size)));
634 nets[i].active = NULL;
635
636 free_netdev(ndev);
637 }
638 }
639
640 subsys_interface_unregister(&rionet_interface);
641}
642
643late_initcall(rionet_init);
644module_exit(rionet_exit);