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[mirror_ubuntu-artful-kernel.git] / drivers / net / rionet.c
CommitLineData
f89efd52
MP
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>
5a0e3ad6 19#include <linux/slab.h>
f89efd52
MP
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>
f41e2472 27#include <linux/reboot.h>
f89efd52
MP
28
29#define DRV_NAME "rionet"
2fb717ec 30#define DRV_VERSION "0.3"
f89efd52
MP
31#define DRV_AUTHOR "Matt Porter <mporter@kernel.crashing.org>"
32#define DRV_DESC "Ethernet over RapidIO"
33
34MODULE_AUTHOR(DRV_AUTHOR);
35MODULE_DESCRIPTION(DRV_DESC);
36MODULE_LICENSE("GPL");
37
38#define RIONET_DEFAULT_MSGLEVEL \
39 (NETIF_MSG_DRV | \
40 NETIF_MSG_LINK | \
41 NETIF_MSG_RX_ERR | \
42 NETIF_MSG_TX_ERR)
43
44#define RIONET_DOORBELL_JOIN 0x1000
45#define RIONET_DOORBELL_LEAVE 0x1001
46
47#define RIONET_MAILBOX 0
48
49#define RIONET_TX_RING_SIZE CONFIG_RIONET_TX_SIZE
50#define RIONET_RX_RING_SIZE CONFIG_RIONET_RX_SIZE
2fb717ec 51#define RIONET_MAX_NETS 8
92444bb3
AJ
52#define RIONET_MSG_SIZE RIO_MAX_MSG_SIZE
53#define RIONET_MAX_MTU (RIONET_MSG_SIZE - ETH_HLEN)
f89efd52
MP
54
55struct rionet_private {
56 struct rio_mport *mport;
57 struct sk_buff *rx_skb[RIONET_RX_RING_SIZE];
58 struct sk_buff *tx_skb[RIONET_TX_RING_SIZE];
f89efd52
MP
59 int rx_slot;
60 int tx_slot;
61 int tx_cnt;
62 int ack_slot;
63 spinlock_t lock;
64 spinlock_t tx_lock;
65 u32 msg_enable;
34ed2ebb 66 bool open;
f89efd52
MP
67};
68
69struct rionet_peer {
70 struct list_head node;
71 struct rio_dev *rdev;
72 struct resource *res;
73};
74
2fb717ec
AB
75struct rionet_net {
76 struct net_device *ndev;
77 struct list_head peers;
34ed2ebb 78 spinlock_t lock; /* net info access lock */
2fb717ec
AB
79 struct rio_dev **active;
80 int nact; /* number of active peers */
81};
f89efd52 82
2fb717ec 83static struct rionet_net nets[RIONET_MAX_NETS];
f89efd52 84
284fb68d
AB
85#define is_rionet_capable(src_ops, dst_ops) \
86 ((src_ops & RIO_SRC_OPS_DATA_MSG) && \
87 (dst_ops & RIO_DST_OPS_DATA_MSG) && \
f89efd52
MP
88 (src_ops & RIO_SRC_OPS_DOORBELL) && \
89 (dst_ops & RIO_DST_OPS_DOORBELL))
90#define dev_rionet_capable(dev) \
284fb68d 91 is_rionet_capable(dev->src_ops, dev->dst_ops)
f89efd52 92
e0c87bd9
AB
93#define RIONET_MAC_MATCH(x) (!memcmp((x), "\00\01\00\01", 4))
94#define RIONET_GET_DESTID(x) ((*((u8 *)x + 4) << 8) | *((u8 *)x + 5))
f89efd52 95
f89efd52
MP
96static int rionet_rx_clean(struct net_device *ndev)
97{
98 int i;
99 int error = 0;
4cf1653a 100 struct rionet_private *rnet = netdev_priv(ndev);
f89efd52
MP
101 void *data;
102
103 i = rnet->rx_slot;
104
105 do {
106 if (!rnet->rx_skb[i])
107 continue;
108
109 if (!(data = rio_get_inb_message(rnet->mport, RIONET_MAILBOX)))
110 break;
111
112 rnet->rx_skb[i]->data = data;
113 skb_put(rnet->rx_skb[i], RIO_MAX_MSG_SIZE);
f89efd52
MP
114 rnet->rx_skb[i]->protocol =
115 eth_type_trans(rnet->rx_skb[i], ndev);
116 error = netif_rx(rnet->rx_skb[i]);
117
118 if (error == NET_RX_DROP) {
09f75cd7 119 ndev->stats.rx_dropped++;
f89efd52 120 } else {
09f75cd7
JG
121 ndev->stats.rx_packets++;
122 ndev->stats.rx_bytes += RIO_MAX_MSG_SIZE;
f89efd52
MP
123 }
124
125 } while ((i = (i + 1) % RIONET_RX_RING_SIZE) != rnet->rx_slot);
126
127 return i;
128}
129
130static void rionet_rx_fill(struct net_device *ndev, int end)
131{
132 int i;
4cf1653a 133 struct rionet_private *rnet = netdev_priv(ndev);
f89efd52
MP
134
135 i = rnet->rx_slot;
136 do {
137 rnet->rx_skb[i] = dev_alloc_skb(RIO_MAX_MSG_SIZE);
138
139 if (!rnet->rx_skb[i])
140 break;
141
142 rio_add_inb_buffer(rnet->mport, RIONET_MAILBOX,
143 rnet->rx_skb[i]->data);
144 } while ((i = (i + 1) % RIONET_RX_RING_SIZE) != end);
145
146 rnet->rx_slot = i;
147}
148
149static int rionet_queue_tx_msg(struct sk_buff *skb, struct net_device *ndev,
150 struct rio_dev *rdev)
151{
4cf1653a 152 struct rionet_private *rnet = netdev_priv(ndev);
f89efd52
MP
153
154 rio_add_outb_message(rnet->mport, rdev, 0, skb->data, skb->len);
155 rnet->tx_skb[rnet->tx_slot] = skb;
156
09f75cd7
JG
157 ndev->stats.tx_packets++;
158 ndev->stats.tx_bytes += skb->len;
f89efd52
MP
159
160 if (++rnet->tx_cnt == RIONET_TX_RING_SIZE)
161 netif_stop_queue(ndev);
162
163 ++rnet->tx_slot;
164 rnet->tx_slot &= (RIONET_TX_RING_SIZE - 1);
165
166 if (netif_msg_tx_queued(rnet))
8df8a475
DM
167 printk(KERN_INFO "%s: queued skb len %8.8x\n", DRV_NAME,
168 skb->len);
f89efd52
MP
169
170 return 0;
171}
172
173static int rionet_start_xmit(struct sk_buff *skb, struct net_device *ndev)
174{
175 int i;
4cf1653a 176 struct rionet_private *rnet = netdev_priv(ndev);
f89efd52
MP
177 struct ethhdr *eth = (struct ethhdr *)skb->data;
178 u16 destid;
179 unsigned long flags;
7c4a6106 180 int add_num = 1;
f89efd52 181
a6086a89 182 spin_lock_irqsave(&rnet->tx_lock, flags);
f89efd52 183
7c4a6106 184 if (is_multicast_ether_addr(eth->h_dest))
2fb717ec 185 add_num = nets[rnet->mport->id].nact;
7c4a6106
AB
186
187 if ((rnet->tx_cnt + add_num) > RIONET_TX_RING_SIZE) {
f89efd52
MP
188 netif_stop_queue(ndev);
189 spin_unlock_irqrestore(&rnet->tx_lock, flags);
190 printk(KERN_ERR "%s: BUG! Tx Ring full when queue awake!\n",
191 ndev->name);
192 return NETDEV_TX_BUSY;
193 }
194
abfc89c7 195 if (is_multicast_ether_addr(eth->h_dest)) {
7c4a6106 196 int count = 0;
2fb717ec 197
e0423236
ZW
198 for (i = 0; i < RIO_MAX_ROUTE_ENTRIES(rnet->mport->sys_size);
199 i++)
2fb717ec 200 if (nets[rnet->mport->id].active[i]) {
f89efd52 201 rionet_queue_tx_msg(skb, ndev,
2fb717ec 202 nets[rnet->mport->id].active[i]);
7c4a6106
AB
203 if (count)
204 atomic_inc(&skb->users);
205 count++;
206 }
f89efd52
MP
207 } else if (RIONET_MAC_MATCH(eth->h_dest)) {
208 destid = RIONET_GET_DESTID(eth->h_dest);
2fb717ec
AB
209 if (nets[rnet->mport->id].active[destid])
210 rionet_queue_tx_msg(skb, ndev,
211 nets[rnet->mport->id].active[destid]);
e6161d64
AB
212 else {
213 /*
214 * If the target device was removed from the list of
215 * active peers but we still have TX packets targeting
216 * it just report sending a packet to the target
217 * (without actual packet transfer).
218 */
219 dev_kfree_skb_any(skb);
220 ndev->stats.tx_packets++;
221 ndev->stats.tx_bytes += skb->len;
222 }
f89efd52
MP
223 }
224
225 spin_unlock_irqrestore(&rnet->tx_lock, flags);
226
6ed10654 227 return NETDEV_TX_OK;
f89efd52
MP
228}
229
230static void rionet_dbell_event(struct rio_mport *mport, void *dev_id, u16 sid, u16 tid,
231 u16 info)
232{
233 struct net_device *ndev = dev_id;
4cf1653a 234 struct rionet_private *rnet = netdev_priv(ndev);
f89efd52 235 struct rionet_peer *peer;
34ed2ebb 236 unsigned char netid = rnet->mport->id;
f89efd52
MP
237
238 if (netif_msg_intr(rnet))
239 printk(KERN_INFO "%s: doorbell sid %4.4x tid %4.4x info %4.4x",
240 DRV_NAME, sid, tid, info);
241 if (info == RIONET_DOORBELL_JOIN) {
34ed2ebb
AB
242 if (!nets[netid].active[sid]) {
243 spin_lock(&nets[netid].lock);
244 list_for_each_entry(peer, &nets[netid].peers, node) {
7c4a6106 245 if (peer->rdev->destid == sid) {
34ed2ebb
AB
246 nets[netid].active[sid] = peer->rdev;
247 nets[netid].nact++;
7c4a6106 248 }
f89efd52 249 }
34ed2ebb
AB
250 spin_unlock(&nets[netid].lock);
251
f89efd52
MP
252 rio_mport_send_doorbell(mport, sid,
253 RIONET_DOORBELL_JOIN);
254 }
255 } else if (info == RIONET_DOORBELL_LEAVE) {
34ed2ebb
AB
256 spin_lock(&nets[netid].lock);
257 if (nets[netid].active[sid]) {
258 nets[netid].active[sid] = NULL;
259 nets[netid].nact--;
260 }
261 spin_unlock(&nets[netid].lock);
f89efd52
MP
262 } else {
263 if (netif_msg_intr(rnet))
264 printk(KERN_WARNING "%s: unhandled doorbell\n",
265 DRV_NAME);
266 }
267}
268
269static void rionet_inb_msg_event(struct rio_mport *mport, void *dev_id, int mbox, int slot)
270{
271 int n;
272 struct net_device *ndev = dev_id;
4cf1653a 273 struct rionet_private *rnet = netdev_priv(ndev);
f89efd52
MP
274
275 if (netif_msg_intr(rnet))
276 printk(KERN_INFO "%s: inbound message event, mbox %d slot %d\n",
277 DRV_NAME, mbox, slot);
278
279 spin_lock(&rnet->lock);
280 if ((n = rionet_rx_clean(ndev)) != rnet->rx_slot)
281 rionet_rx_fill(ndev, n);
282 spin_unlock(&rnet->lock);
283}
284
285static void rionet_outb_msg_event(struct rio_mport *mport, void *dev_id, int mbox, int slot)
286{
287 struct net_device *ndev = dev_id;
4cf1653a 288 struct rionet_private *rnet = netdev_priv(ndev);
f89efd52 289
36915976 290 spin_lock(&rnet->tx_lock);
f89efd52
MP
291
292 if (netif_msg_intr(rnet))
293 printk(KERN_INFO
294 "%s: outbound message event, mbox %d slot %d\n",
295 DRV_NAME, mbox, slot);
296
297 while (rnet->tx_cnt && (rnet->ack_slot != slot)) {
298 /* dma unmap single */
299 dev_kfree_skb_irq(rnet->tx_skb[rnet->ack_slot]);
300 rnet->tx_skb[rnet->ack_slot] = NULL;
301 ++rnet->ack_slot;
302 rnet->ack_slot &= (RIONET_TX_RING_SIZE - 1);
303 rnet->tx_cnt--;
304 }
305
306 if (rnet->tx_cnt < RIONET_TX_RING_SIZE)
307 netif_wake_queue(ndev);
308
36915976 309 spin_unlock(&rnet->tx_lock);
f89efd52
MP
310}
311
312static int rionet_open(struct net_device *ndev)
313{
314 int i, rc = 0;
34ed2ebb 315 struct rionet_peer *peer;
4cf1653a 316 struct rionet_private *rnet = netdev_priv(ndev);
34ed2ebb
AB
317 unsigned char netid = rnet->mport->id;
318 unsigned long flags;
f89efd52
MP
319
320 if (netif_msg_ifup(rnet))
321 printk(KERN_INFO "%s: open\n", DRV_NAME);
322
323 if ((rc = rio_request_inb_dbell(rnet->mport,
324 (void *)ndev,
325 RIONET_DOORBELL_JOIN,
326 RIONET_DOORBELL_LEAVE,
327 rionet_dbell_event)) < 0)
328 goto out;
329
330 if ((rc = rio_request_inb_mbox(rnet->mport,
331 (void *)ndev,
332 RIONET_MAILBOX,
333 RIONET_RX_RING_SIZE,
334 rionet_inb_msg_event)) < 0)
335 goto out;
336
337 if ((rc = rio_request_outb_mbox(rnet->mport,
338 (void *)ndev,
339 RIONET_MAILBOX,
340 RIONET_TX_RING_SIZE,
341 rionet_outb_msg_event)) < 0)
342 goto out;
343
344 /* Initialize inbound message ring */
345 for (i = 0; i < RIONET_RX_RING_SIZE; i++)
346 rnet->rx_skb[i] = NULL;
347 rnet->rx_slot = 0;
348 rionet_rx_fill(ndev, 0);
349
350 rnet->tx_slot = 0;
351 rnet->tx_cnt = 0;
352 rnet->ack_slot = 0;
353
354 netif_carrier_on(ndev);
355 netif_start_queue(ndev);
356
34ed2ebb
AB
357 spin_lock_irqsave(&nets[netid].lock, flags);
358 list_for_each_entry(peer, &nets[netid].peers, node) {
284fb68d
AB
359 /* Send a join message */
360 rio_send_doorbell(peer->rdev, RIONET_DOORBELL_JOIN);
f89efd52 361 }
34ed2ebb
AB
362 spin_unlock_irqrestore(&nets[netid].lock, flags);
363 rnet->open = true;
f89efd52
MP
364
365 out:
366 return rc;
367}
368
369static int rionet_close(struct net_device *ndev)
370{
4cf1653a 371 struct rionet_private *rnet = netdev_priv(ndev);
34ed2ebb
AB
372 struct rionet_peer *peer;
373 unsigned char netid = rnet->mport->id;
374 unsigned long flags;
f89efd52
MP
375 int i;
376
377 if (netif_msg_ifup(rnet))
2fb717ec 378 printk(KERN_INFO "%s: close %s\n", DRV_NAME, ndev->name);
f89efd52
MP
379
380 netif_stop_queue(ndev);
381 netif_carrier_off(ndev);
34ed2ebb 382 rnet->open = false;
f89efd52
MP
383
384 for (i = 0; i < RIONET_RX_RING_SIZE; i++)
aaff1e19 385 kfree_skb(rnet->rx_skb[i]);
f89efd52 386
34ed2ebb
AB
387 spin_lock_irqsave(&nets[netid].lock, flags);
388 list_for_each_entry(peer, &nets[netid].peers, node) {
389 if (nets[netid].active[peer->rdev->destid]) {
f89efd52 390 rio_send_doorbell(peer->rdev, RIONET_DOORBELL_LEAVE);
34ed2ebb 391 nets[netid].active[peer->rdev->destid] = NULL;
f89efd52 392 }
34ed2ebb
AB
393 if (peer->res)
394 rio_release_outb_dbell(peer->rdev, peer->res);
f89efd52 395 }
34ed2ebb 396 spin_unlock_irqrestore(&nets[netid].lock, flags);
f89efd52
MP
397
398 rio_release_inb_dbell(rnet->mport, RIONET_DOORBELL_JOIN,
399 RIONET_DOORBELL_LEAVE);
400 rio_release_inb_mbox(rnet->mport, RIONET_MAILBOX);
401 rio_release_outb_mbox(rnet->mport, RIONET_MAILBOX);
402
403 return 0;
404}
405
71db87ba 406static void rionet_remove_dev(struct device *dev, struct subsys_interface *sif)
f89efd52 407{
e6161d64 408 struct rio_dev *rdev = to_rio_dev(dev);
2fb717ec 409 unsigned char netid = rdev->net->hport->id;
34ed2ebb
AB
410 struct rionet_peer *peer;
411 int state, found = 0;
412 unsigned long flags;
f89efd52 413
34ed2ebb
AB
414 if (!dev_rionet_capable(rdev))
415 return;
416
417 spin_lock_irqsave(&nets[netid].lock, flags);
418 list_for_each_entry(peer, &nets[netid].peers, node) {
419 if (peer->rdev == rdev) {
420 list_del(&peer->node);
421 if (nets[netid].active[rdev->destid]) {
422 state = atomic_read(&rdev->state);
423 if (state != RIO_DEVICE_GONE &&
424 state != RIO_DEVICE_INITIALIZING) {
425 rio_send_doorbell(rdev,
426 RIONET_DOORBELL_LEAVE);
e6161d64 427 }
34ed2ebb
AB
428 nets[netid].active[rdev->destid] = NULL;
429 nets[netid].nact--;
e6161d64 430 }
34ed2ebb
AB
431 found = 1;
432 break;
e6161d64 433 }
f89efd52 434 }
34ed2ebb
AB
435 spin_unlock_irqrestore(&nets[netid].lock, flags);
436
437 if (found) {
438 if (peer->res)
439 rio_release_outb_dbell(rdev, peer->res);
440 kfree(peer);
441 }
f89efd52
MP
442}
443
444static void rionet_get_drvinfo(struct net_device *ndev,
445 struct ethtool_drvinfo *info)
446{
4cf1653a 447 struct rionet_private *rnet = netdev_priv(ndev);
f89efd52 448
7826d43f
JP
449 strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
450 strlcpy(info->version, DRV_VERSION, sizeof(info->version));
451 strlcpy(info->fw_version, "n/a", sizeof(info->fw_version));
452 strlcpy(info->bus_info, rnet->mport->name, sizeof(info->bus_info));
f89efd52
MP
453}
454
455static u32 rionet_get_msglevel(struct net_device *ndev)
456{
4cf1653a 457 struct rionet_private *rnet = netdev_priv(ndev);
f89efd52
MP
458
459 return rnet->msg_enable;
460}
461
462static void rionet_set_msglevel(struct net_device *ndev, u32 value)
463{
4cf1653a 464 struct rionet_private *rnet = netdev_priv(ndev);
f89efd52
MP
465
466 rnet->msg_enable = value;
467}
468
92444bb3
AJ
469static int rionet_change_mtu(struct net_device *ndev, int new_mtu)
470{
471 if ((new_mtu < 68) || (new_mtu > RIONET_MAX_MTU)) {
472 printk(KERN_ERR "%s: Invalid MTU size %d\n",
473 ndev->name, new_mtu);
474 return -EINVAL;
475 }
476 ndev->mtu = new_mtu;
477 return 0;
478}
479
7282d491 480static const struct ethtool_ops rionet_ethtool_ops = {
f89efd52
MP
481 .get_drvinfo = rionet_get_drvinfo,
482 .get_msglevel = rionet_get_msglevel,
483 .set_msglevel = rionet_set_msglevel,
484 .get_link = ethtool_op_get_link,
485};
486
a33a2bb3
AB
487static const struct net_device_ops rionet_netdev_ops = {
488 .ndo_open = rionet_open,
489 .ndo_stop = rionet_close,
490 .ndo_start_xmit = rionet_start_xmit,
92444bb3 491 .ndo_change_mtu = rionet_change_mtu,
a33a2bb3
AB
492 .ndo_validate_addr = eth_validate_addr,
493 .ndo_set_mac_address = eth_mac_addr,
494};
495
55caa924 496static int rionet_setup_netdev(struct rio_mport *mport, struct net_device *ndev)
f89efd52
MP
497{
498 int rc = 0;
f89efd52
MP
499 struct rionet_private *rnet;
500 u16 device_id;
acc65632
AM
501 const size_t rionet_active_bytes = sizeof(void *) *
502 RIO_MAX_ROUTE_ENTRIES(mport->sys_size);
f89efd52 503
2fb717ec
AB
504 nets[mport->id].active = (struct rio_dev **)__get_free_pages(GFP_KERNEL,
505 get_order(rionet_active_bytes));
506 if (!nets[mport->id].active) {
e0423236
ZW
507 rc = -ENOMEM;
508 goto out;
509 }
2fb717ec 510 memset((void *)nets[mport->id].active, 0, rionet_active_bytes);
e0423236 511
f89efd52 512 /* Set up private area */
4cf1653a 513 rnet = netdev_priv(ndev);
f89efd52 514 rnet->mport = mport;
34ed2ebb 515 rnet->open = false;
f89efd52
MP
516
517 /* Set the default MAC address */
518 device_id = rio_local_get_device_id(mport);
519 ndev->dev_addr[0] = 0x00;
520 ndev->dev_addr[1] = 0x01;
521 ndev->dev_addr[2] = 0x00;
522 ndev->dev_addr[3] = 0x01;
523 ndev->dev_addr[4] = device_id >> 8;
524 ndev->dev_addr[5] = device_id & 0xff;
525
a33a2bb3 526 ndev->netdev_ops = &rionet_netdev_ops;
92444bb3 527 ndev->mtu = RIONET_MAX_MTU;
f89efd52 528 ndev->features = NETIF_F_LLTX;
2aaf308b 529 SET_NETDEV_DEV(ndev, &mport->dev);
7ad24ea4 530 ndev->ethtool_ops = &rionet_ethtool_ops;
f89efd52 531
f89efd52
MP
532 spin_lock_init(&rnet->lock);
533 spin_lock_init(&rnet->tx_lock);
534
535 rnet->msg_enable = RIONET_DEFAULT_MSGLEVEL;
536
537 rc = register_netdev(ndev);
34ed2ebb
AB
538 if (rc != 0) {
539 free_pages((unsigned long)nets[mport->id].active,
540 get_order(rionet_active_bytes));
f89efd52 541 goto out;
34ed2ebb 542 }
f89efd52 543
2fb717ec 544 printk(KERN_INFO "%s: %s %s Version %s, MAC %pM, %s\n",
f89efd52
MP
545 ndev->name,
546 DRV_NAME,
547 DRV_DESC,
548 DRV_VERSION,
2fb717ec
AB
549 ndev->dev_addr,
550 mport->name);
f89efd52
MP
551
552 out:
553 return rc;
554}
555
e6161d64 556static int rionet_add_dev(struct device *dev, struct subsys_interface *sif)
f89efd52
MP
557{
558 int rc = -ENODEV;
284fb68d 559 u32 lsrc_ops, ldst_ops;
f89efd52 560 struct rionet_peer *peer;
55caa924 561 struct net_device *ndev = NULL;
e6161d64 562 struct rio_dev *rdev = to_rio_dev(dev);
2fb717ec 563 unsigned char netid = rdev->net->hport->id;
f89efd52 564
2fb717ec
AB
565 if (netid >= RIONET_MAX_NETS)
566 return rc;
f89efd52
MP
567
568 /*
e6161d64
AB
569 * If first time through this net, make sure local device is rionet
570 * capable and setup netdev (this step will be skipped in later probes
571 * on the same net).
f89efd52 572 */
34ed2ebb 573 if (!nets[netid].ndev) {
f89efd52
MP
574 rio_local_read_config_32(rdev->net->hport, RIO_SRC_OPS_CAR,
575 &lsrc_ops);
576 rio_local_read_config_32(rdev->net->hport, RIO_DST_OPS_CAR,
577 &ldst_ops);
284fb68d 578 if (!is_rionet_capable(lsrc_ops, ldst_ops)) {
f89efd52 579 printk(KERN_ERR
2fb717ec
AB
580 "%s: local device %s is not network capable\n",
581 DRV_NAME, rdev->net->hport->name);
f89efd52
MP
582 goto out;
583 }
584
2fb717ec
AB
585 /* Allocate our net_device structure */
586 ndev = alloc_etherdev(sizeof(struct rionet_private));
587 if (ndev == NULL) {
588 rc = -ENOMEM;
589 goto out;
590 }
34ed2ebb 591
55caa924 592 rc = rionet_setup_netdev(rdev->net->hport, ndev);
e6161d64
AB
593 if (rc) {
594 printk(KERN_ERR "%s: failed to setup netdev (rc=%d)\n",
595 DRV_NAME, rc);
34ed2ebb 596 free_netdev(ndev);
e6161d64
AB
597 goto out;
598 }
599
2fb717ec 600 INIT_LIST_HEAD(&nets[netid].peers);
34ed2ebb 601 spin_lock_init(&nets[netid].lock);
2fb717ec 602 nets[netid].nact = 0;
34ed2ebb
AB
603 nets[netid].ndev = ndev;
604 }
f89efd52
MP
605
606 /*
607 * If the remote device has mailbox/doorbell capabilities,
608 * add it to the peer list.
609 */
610 if (dev_rionet_capable(rdev)) {
34ed2ebb
AB
611 struct rionet_private *rnet;
612 unsigned long flags;
613
614 rnet = netdev_priv(nets[netid].ndev);
615
616 peer = kzalloc(sizeof(*peer), GFP_KERNEL);
617 if (!peer) {
f89efd52
MP
618 rc = -ENOMEM;
619 goto out;
620 }
621 peer->rdev = rdev;
34ed2ebb
AB
622 peer->res = rio_request_outb_dbell(peer->rdev,
623 RIONET_DOORBELL_JOIN,
624 RIONET_DOORBELL_LEAVE);
625 if (!peer->res) {
626 pr_err("%s: error requesting doorbells\n", DRV_NAME);
627 kfree(peer);
628 rc = -ENOMEM;
629 goto out;
630 }
631
632 spin_lock_irqsave(&nets[netid].lock, flags);
2fb717ec 633 list_add_tail(&peer->node, &nets[netid].peers);
34ed2ebb
AB
634 spin_unlock_irqrestore(&nets[netid].lock, flags);
635 pr_debug("%s: %s add peer %s\n",
636 DRV_NAME, __func__, rio_name(rdev));
637
638 /* If netdev is already opened, send join request to new peer */
639 if (rnet->open)
640 rio_send_doorbell(peer->rdev, RIONET_DOORBELL_JOIN);
f89efd52
MP
641 }
642
e6161d64
AB
643 return 0;
644out:
f89efd52
MP
645 return rc;
646}
647
f41e2472
AB
648static int rionet_shutdown(struct notifier_block *nb, unsigned long code,
649 void *unused)
650{
34ed2ebb
AB
651 struct rionet_peer *peer;
652 unsigned long flags;
f41e2472
AB
653 int i;
654
655 pr_debug("%s: %s\n", DRV_NAME, __func__);
656
657 for (i = 0; i < RIONET_MAX_NETS; i++) {
658 if (!nets[i].ndev)
659 continue;
660
34ed2ebb
AB
661 spin_lock_irqsave(&nets[i].lock, flags);
662 list_for_each_entry(peer, &nets[i].peers, node) {
f41e2472
AB
663 if (nets[i].active[peer->rdev->destid]) {
664 rio_send_doorbell(peer->rdev,
665 RIONET_DOORBELL_LEAVE);
666 nets[i].active[peer->rdev->destid] = NULL;
667 }
668 }
34ed2ebb 669 spin_unlock_irqrestore(&nets[i].lock, flags);
f41e2472
AB
670 }
671
672 return NOTIFY_DONE;
673}
674
b7dfca8b
AB
675static void rionet_remove_mport(struct device *dev,
676 struct class_interface *class_intf)
677{
678 struct rio_mport *mport = to_rio_mport(dev);
679 struct net_device *ndev;
680 int id = mport->id;
681
682 pr_debug("%s %s\n", __func__, mport->name);
683
684 WARN(nets[id].nact, "%s called when connected to %d peers\n",
685 __func__, nets[id].nact);
686 WARN(!nets[id].ndev, "%s called for mport without NDEV\n",
687 __func__);
688
689 if (nets[id].ndev) {
690 ndev = nets[id].ndev;
691 netif_stop_queue(ndev);
692 unregister_netdev(ndev);
693
694 free_pages((unsigned long)nets[id].active,
695 get_order(sizeof(void *) *
696 RIO_MAX_ROUTE_ENTRIES(mport->sys_size)));
697 nets[id].active = NULL;
698 free_netdev(ndev);
699 nets[id].ndev = NULL;
700 }
701}
702
e6161d64 703#ifdef MODULE
f89efd52 704static struct rio_device_id rionet_id_table[] = {
e6161d64
AB
705 {RIO_DEVICE(RIO_ANY_ID, RIO_ANY_ID)},
706 { 0, } /* terminate list */
f89efd52
MP
707};
708
e6161d64
AB
709MODULE_DEVICE_TABLE(rapidio, rionet_id_table);
710#endif
711
712static struct subsys_interface rionet_interface = {
713 .name = "rionet",
714 .subsys = &rio_bus_type,
715 .add_dev = rionet_add_dev,
716 .remove_dev = rionet_remove_dev,
f89efd52
MP
717};
718
f41e2472
AB
719static struct notifier_block rionet_notifier = {
720 .notifier_call = rionet_shutdown,
721};
722
b7dfca8b
AB
723/* the rio_mport_interface is used to handle local mport devices */
724static struct class_interface rio_mport_interface __refdata = {
725 .class = &rio_mport_class,
726 .add_dev = NULL,
727 .remove_dev = rionet_remove_mport,
728};
729
f89efd52
MP
730static int __init rionet_init(void)
731{
f41e2472
AB
732 int ret;
733
734 ret = register_reboot_notifier(&rionet_notifier);
735 if (ret) {
736 pr_err("%s: failed to register reboot notifier (err=%d)\n",
737 DRV_NAME, ret);
738 return ret;
739 }
b7dfca8b
AB
740
741 ret = class_interface_register(&rio_mport_interface);
742 if (ret) {
743 pr_err("%s: class_interface_register error: %d\n",
744 DRV_NAME, ret);
745 return ret;
746 }
747
e6161d64 748 return subsys_interface_register(&rionet_interface);
f89efd52
MP
749}
750
751static void __exit rionet_exit(void)
752{
f41e2472 753 unregister_reboot_notifier(&rionet_notifier);
e6161d64 754 subsys_interface_unregister(&rionet_interface);
b7dfca8b 755 class_interface_unregister(&rio_mport_interface);
f89efd52
MP
756}
757
2f809985 758late_initcall(rionet_init);
f89efd52 759module_exit(rionet_exit);