blob: f433b594388e170b28b1aa57a92485625d897cb6 [file] [log] [blame]
Matt Porterf89efd52005-09-09 12:10:10 -07001/*
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>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090019#include <linux/slab.h>
Matt Porterf89efd52005-09-09 12:10:10 -070020#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"
Alexandre Bounine2fb717e2012-10-04 17:16:11 -070029#define DRV_VERSION "0.3"
Matt Porterf89efd52005-09-09 12:10:10 -070030#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
Alexandre Bounine2fb717e2012-10-04 17:16:11 -070050#define RIONET_MAX_NETS 8
Matt Porterf89efd52005-09-09 12:10:10 -070051
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];
Matt Porterf89efd52005-09-09 12:10:10 -070056 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
Alexandre Bounine2fb717e2012-10-04 17:16:11 -070071struct 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};
Matt Porterf89efd52005-09-09 12:10:10 -070077
Alexandre Bounine2fb717e2012-10-04 17:16:11 -070078static struct rionet_net nets[RIONET_MAX_NETS];
Matt Porterf89efd52005-09-09 12:10:10 -070079
Alexandre Bounine284fb682011-08-25 15:59:13 -070080#define is_rionet_capable(src_ops, dst_ops) \
81 ((src_ops & RIO_SRC_OPS_DATA_MSG) && \
82 (dst_ops & RIO_DST_OPS_DATA_MSG) && \
Matt Porterf89efd52005-09-09 12:10:10 -070083 (src_ops & RIO_SRC_OPS_DOORBELL) && \
84 (dst_ops & RIO_DST_OPS_DOORBELL))
85#define dev_rionet_capable(dev) \
Alexandre Bounine284fb682011-08-25 15:59:13 -070086 is_rionet_capable(dev->src_ops, dev->dst_ops)
Matt Porterf89efd52005-09-09 12:10:10 -070087
Alexandre Bouninee0c87bd2011-11-02 13:39:15 -070088#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))
Matt Porterf89efd52005-09-09 12:10:10 -070090
Matt Porterf89efd52005-09-09 12:10:10 -070091static int rionet_rx_clean(struct net_device *ndev)
92{
93 int i;
94 int error = 0;
Wang Chen4cf16532008-11-12 23:38:14 -080095 struct rionet_private *rnet = netdev_priv(ndev);
Matt Porterf89efd52005-09-09 12:10:10 -070096 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);
Matt Porterf89efd52005-09-09 12:10:10 -0700109 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) {
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700114 ndev->stats.rx_dropped++;
Matt Porterf89efd52005-09-09 12:10:10 -0700115 } else {
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700116 ndev->stats.rx_packets++;
117 ndev->stats.rx_bytes += RIO_MAX_MSG_SIZE;
Matt Porterf89efd52005-09-09 12:10:10 -0700118 }
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;
Wang Chen4cf16532008-11-12 23:38:14 -0800128 struct rionet_private *rnet = netdev_priv(ndev);
Matt Porterf89efd52005-09-09 12:10:10 -0700129
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{
Wang Chen4cf16532008-11-12 23:38:14 -0800147 struct rionet_private *rnet = netdev_priv(ndev);
Matt Porterf89efd52005-09-09 12:10:10 -0700148
149 rio_add_outb_message(rnet->mport, rdev, 0, skb->data, skb->len);
150 rnet->tx_skb[rnet->tx_slot] = skb;
151
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700152 ndev->stats.tx_packets++;
153 ndev->stats.tx_bytes += skb->len;
Matt Porterf89efd52005-09-09 12:10:10 -0700154
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))
David S. Miller8df8a472011-05-22 20:35:54 -0400162 printk(KERN_INFO "%s: queued skb len %8.8x\n", DRV_NAME,
163 skb->len);
Matt Porterf89efd52005-09-09 12:10:10 -0700164
165 return 0;
166}
167
168static int rionet_start_xmit(struct sk_buff *skb, struct net_device *ndev)
169{
170 int i;
Wang Chen4cf16532008-11-12 23:38:14 -0800171 struct rionet_private *rnet = netdev_priv(ndev);
Matt Porterf89efd52005-09-09 12:10:10 -0700172 struct ethhdr *eth = (struct ethhdr *)skb->data;
173 u16 destid;
174 unsigned long flags;
Alexandre Bounine7c4a6102012-10-04 17:15:48 -0700175 int add_num = 1;
Matt Porterf89efd52005-09-09 12:10:10 -0700176
177 local_irq_save(flags);
178 if (!spin_trylock(&rnet->tx_lock)) {
179 local_irq_restore(flags);
180 return NETDEV_TX_LOCKED;
181 }
182
Alexandre Bounine7c4a6102012-10-04 17:15:48 -0700183 if (is_multicast_ether_addr(eth->h_dest))
Alexandre Bounine2fb717e2012-10-04 17:16:11 -0700184 add_num = nets[rnet->mport->id].nact;
Alexandre Bounine7c4a6102012-10-04 17:15:48 -0700185
186 if ((rnet->tx_cnt + add_num) > RIONET_TX_RING_SIZE) {
Matt Porterf89efd52005-09-09 12:10:10 -0700187 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
Tobias Klauserabfc89c2011-07-03 23:54:54 +0000194 if (is_multicast_ether_addr(eth->h_dest)) {
Alexandre Bounine7c4a6102012-10-04 17:15:48 -0700195 int count = 0;
Alexandre Bounine2fb717e2012-10-04 17:16:11 -0700196
Zhang Weie0423232008-04-18 13:33:42 -0700197 for (i = 0; i < RIO_MAX_ROUTE_ENTRIES(rnet->mport->sys_size);
198 i++)
Alexandre Bounine2fb717e2012-10-04 17:16:11 -0700199 if (nets[rnet->mport->id].active[i]) {
Matt Porterf89efd52005-09-09 12:10:10 -0700200 rionet_queue_tx_msg(skb, ndev,
Alexandre Bounine2fb717e2012-10-04 17:16:11 -0700201 nets[rnet->mport->id].active[i]);
Alexandre Bounine7c4a6102012-10-04 17:15:48 -0700202 if (count)
203 atomic_inc(&skb->users);
204 count++;
205 }
Matt Porterf89efd52005-09-09 12:10:10 -0700206 } else if (RIONET_MAC_MATCH(eth->h_dest)) {
207 destid = RIONET_GET_DESTID(eth->h_dest);
Alexandre Bounine2fb717e2012-10-04 17:16:11 -0700208 if (nets[rnet->mport->id].active[destid])
209 rionet_queue_tx_msg(skb, ndev,
210 nets[rnet->mport->id].active[destid]);
Matt Porterf89efd52005-09-09 12:10:10 -0700211 }
212
213 spin_unlock_irqrestore(&rnet->tx_lock, flags);
214
Patrick McHardy6ed10652009-06-23 06:03:08 +0000215 return NETDEV_TX_OK;
Matt Porterf89efd52005-09-09 12:10:10 -0700216}
217
218static void rionet_dbell_event(struct rio_mport *mport, void *dev_id, u16 sid, u16 tid,
219 u16 info)
220{
221 struct net_device *ndev = dev_id;
Wang Chen4cf16532008-11-12 23:38:14 -0800222 struct rionet_private *rnet = netdev_priv(ndev);
Matt Porterf89efd52005-09-09 12:10:10 -0700223 struct rionet_peer *peer;
224
225 if (netif_msg_intr(rnet))
226 printk(KERN_INFO "%s: doorbell sid %4.4x tid %4.4x info %4.4x",
227 DRV_NAME, sid, tid, info);
228 if (info == RIONET_DOORBELL_JOIN) {
Alexandre Bounine2fb717e2012-10-04 17:16:11 -0700229 if (!nets[rnet->mport->id].active[sid]) {
230 list_for_each_entry(peer,
231 &nets[rnet->mport->id].peers, node) {
Alexandre Bounine7c4a6102012-10-04 17:15:48 -0700232 if (peer->rdev->destid == sid) {
Alexandre Bounine2fb717e2012-10-04 17:16:11 -0700233 nets[rnet->mport->id].active[sid] =
234 peer->rdev;
235 nets[rnet->mport->id].nact++;
Alexandre Bounine7c4a6102012-10-04 17:15:48 -0700236 }
Matt Porterf89efd52005-09-09 12:10:10 -0700237 }
238 rio_mport_send_doorbell(mport, sid,
239 RIONET_DOORBELL_JOIN);
240 }
241 } else if (info == RIONET_DOORBELL_LEAVE) {
Alexandre Bounine2fb717e2012-10-04 17:16:11 -0700242 nets[rnet->mport->id].active[sid] = NULL;
243 nets[rnet->mport->id].nact--;
Matt Porterf89efd52005-09-09 12:10:10 -0700244 } else {
245 if (netif_msg_intr(rnet))
246 printk(KERN_WARNING "%s: unhandled doorbell\n",
247 DRV_NAME);
248 }
249}
250
251static void rionet_inb_msg_event(struct rio_mport *mport, void *dev_id, int mbox, int slot)
252{
253 int n;
254 struct net_device *ndev = dev_id;
Wang Chen4cf16532008-11-12 23:38:14 -0800255 struct rionet_private *rnet = netdev_priv(ndev);
Matt Porterf89efd52005-09-09 12:10:10 -0700256
257 if (netif_msg_intr(rnet))
258 printk(KERN_INFO "%s: inbound message event, mbox %d slot %d\n",
259 DRV_NAME, mbox, slot);
260
261 spin_lock(&rnet->lock);
262 if ((n = rionet_rx_clean(ndev)) != rnet->rx_slot)
263 rionet_rx_fill(ndev, n);
264 spin_unlock(&rnet->lock);
265}
266
267static void rionet_outb_msg_event(struct rio_mport *mport, void *dev_id, int mbox, int slot)
268{
269 struct net_device *ndev = dev_id;
Wang Chen4cf16532008-11-12 23:38:14 -0800270 struct rionet_private *rnet = netdev_priv(ndev);
Matt Porterf89efd52005-09-09 12:10:10 -0700271
272 spin_lock(&rnet->lock);
273
274 if (netif_msg_intr(rnet))
275 printk(KERN_INFO
276 "%s: outbound message event, mbox %d slot %d\n",
277 DRV_NAME, mbox, slot);
278
279 while (rnet->tx_cnt && (rnet->ack_slot != slot)) {
280 /* dma unmap single */
281 dev_kfree_skb_irq(rnet->tx_skb[rnet->ack_slot]);
282 rnet->tx_skb[rnet->ack_slot] = NULL;
283 ++rnet->ack_slot;
284 rnet->ack_slot &= (RIONET_TX_RING_SIZE - 1);
285 rnet->tx_cnt--;
286 }
287
288 if (rnet->tx_cnt < RIONET_TX_RING_SIZE)
289 netif_wake_queue(ndev);
290
291 spin_unlock(&rnet->lock);
292}
293
294static int rionet_open(struct net_device *ndev)
295{
296 int i, rc = 0;
297 struct rionet_peer *peer, *tmp;
Wang Chen4cf16532008-11-12 23:38:14 -0800298 struct rionet_private *rnet = netdev_priv(ndev);
Matt Porterf89efd52005-09-09 12:10:10 -0700299
300 if (netif_msg_ifup(rnet))
301 printk(KERN_INFO "%s: open\n", DRV_NAME);
302
303 if ((rc = rio_request_inb_dbell(rnet->mport,
304 (void *)ndev,
305 RIONET_DOORBELL_JOIN,
306 RIONET_DOORBELL_LEAVE,
307 rionet_dbell_event)) < 0)
308 goto out;
309
310 if ((rc = rio_request_inb_mbox(rnet->mport,
311 (void *)ndev,
312 RIONET_MAILBOX,
313 RIONET_RX_RING_SIZE,
314 rionet_inb_msg_event)) < 0)
315 goto out;
316
317 if ((rc = rio_request_outb_mbox(rnet->mport,
318 (void *)ndev,
319 RIONET_MAILBOX,
320 RIONET_TX_RING_SIZE,
321 rionet_outb_msg_event)) < 0)
322 goto out;
323
324 /* Initialize inbound message ring */
325 for (i = 0; i < RIONET_RX_RING_SIZE; i++)
326 rnet->rx_skb[i] = NULL;
327 rnet->rx_slot = 0;
328 rionet_rx_fill(ndev, 0);
329
330 rnet->tx_slot = 0;
331 rnet->tx_cnt = 0;
332 rnet->ack_slot = 0;
333
334 netif_carrier_on(ndev);
335 netif_start_queue(ndev);
336
Alexandre Bounine2fb717e2012-10-04 17:16:11 -0700337 list_for_each_entry_safe(peer, tmp,
338 &nets[rnet->mport->id].peers, node) {
Matt Porterf89efd52005-09-09 12:10:10 -0700339 if (!(peer->res = rio_request_outb_dbell(peer->rdev,
340 RIONET_DOORBELL_JOIN,
341 RIONET_DOORBELL_LEAVE)))
342 {
343 printk(KERN_ERR "%s: error requesting doorbells\n",
344 DRV_NAME);
345 continue;
346 }
347
Alexandre Bounine284fb682011-08-25 15:59:13 -0700348 /* Send a join message */
349 rio_send_doorbell(peer->rdev, RIONET_DOORBELL_JOIN);
Matt Porterf89efd52005-09-09 12:10:10 -0700350 }
351
352 out:
353 return rc;
354}
355
356static int rionet_close(struct net_device *ndev)
357{
Wang Chen4cf16532008-11-12 23:38:14 -0800358 struct rionet_private *rnet = netdev_priv(ndev);
Matt Porterf89efd52005-09-09 12:10:10 -0700359 struct rionet_peer *peer, *tmp;
360 int i;
361
362 if (netif_msg_ifup(rnet))
Alexandre Bounine2fb717e2012-10-04 17:16:11 -0700363 printk(KERN_INFO "%s: close %s\n", DRV_NAME, ndev->name);
Matt Porterf89efd52005-09-09 12:10:10 -0700364
365 netif_stop_queue(ndev);
366 netif_carrier_off(ndev);
367
368 for (i = 0; i < RIONET_RX_RING_SIZE; i++)
Wei Yongjunaaff1e12009-02-25 00:18:12 +0000369 kfree_skb(rnet->rx_skb[i]);
Matt Porterf89efd52005-09-09 12:10:10 -0700370
Alexandre Bounine2fb717e2012-10-04 17:16:11 -0700371 list_for_each_entry_safe(peer, tmp,
372 &nets[rnet->mport->id].peers, node) {
373 if (nets[rnet->mport->id].active[peer->rdev->destid]) {
Matt Porterf89efd52005-09-09 12:10:10 -0700374 rio_send_doorbell(peer->rdev, RIONET_DOORBELL_LEAVE);
Alexandre Bounine2fb717e2012-10-04 17:16:11 -0700375 nets[rnet->mport->id].active[peer->rdev->destid] = NULL;
Matt Porterf89efd52005-09-09 12:10:10 -0700376 }
377 rio_release_outb_dbell(peer->rdev, peer->res);
378 }
379
380 rio_release_inb_dbell(rnet->mport, RIONET_DOORBELL_JOIN,
381 RIONET_DOORBELL_LEAVE);
382 rio_release_inb_mbox(rnet->mport, RIONET_MAILBOX);
383 rio_release_outb_mbox(rnet->mport, RIONET_MAILBOX);
384
385 return 0;
386}
387
388static void rionet_remove(struct rio_dev *rdev)
389{
Yinglin Luan55caa922011-06-25 18:12:12 +0000390 struct net_device *ndev = rio_get_drvdata(rdev);
Alexandre Bounine2fb717e2012-10-04 17:16:11 -0700391 unsigned char netid = rdev->net->hport->id;
Matt Porterf89efd52005-09-09 12:10:10 -0700392 struct rionet_peer *peer, *tmp;
393
394 unregister_netdev(ndev);
Matt Porterf89efd52005-09-09 12:10:10 -0700395
Alexandre Bounine2fb717e2012-10-04 17:16:11 -0700396 free_pages((unsigned long)nets[netid].active, get_order(sizeof(void *) *
397 RIO_MAX_ROUTE_ENTRIES(rdev->net->hport->sys_size)));
398 nets[netid].active = NULL;
399
400 list_for_each_entry_safe(peer, tmp, &nets[netid].peers, node) {
Matt Porterf89efd52005-09-09 12:10:10 -0700401 list_del(&peer->node);
402 kfree(peer);
403 }
Alexandre Bounine2fb717e2012-10-04 17:16:11 -0700404
405 free_netdev(ndev);
Matt Porterf89efd52005-09-09 12:10:10 -0700406}
407
408static void rionet_get_drvinfo(struct net_device *ndev,
409 struct ethtool_drvinfo *info)
410{
Wang Chen4cf16532008-11-12 23:38:14 -0800411 struct rionet_private *rnet = netdev_priv(ndev);
Matt Porterf89efd52005-09-09 12:10:10 -0700412
Jiri Pirko7826d432013-01-06 00:44:26 +0000413 strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
414 strlcpy(info->version, DRV_VERSION, sizeof(info->version));
415 strlcpy(info->fw_version, "n/a", sizeof(info->fw_version));
416 strlcpy(info->bus_info, rnet->mport->name, sizeof(info->bus_info));
Matt Porterf89efd52005-09-09 12:10:10 -0700417}
418
419static u32 rionet_get_msglevel(struct net_device *ndev)
420{
Wang Chen4cf16532008-11-12 23:38:14 -0800421 struct rionet_private *rnet = netdev_priv(ndev);
Matt Porterf89efd52005-09-09 12:10:10 -0700422
423 return rnet->msg_enable;
424}
425
426static void rionet_set_msglevel(struct net_device *ndev, u32 value)
427{
Wang Chen4cf16532008-11-12 23:38:14 -0800428 struct rionet_private *rnet = netdev_priv(ndev);
Matt Porterf89efd52005-09-09 12:10:10 -0700429
430 rnet->msg_enable = value;
431}
432
Jeff Garzik7282d492006-09-13 14:30:00 -0400433static const struct ethtool_ops rionet_ethtool_ops = {
Matt Porterf89efd52005-09-09 12:10:10 -0700434 .get_drvinfo = rionet_get_drvinfo,
435 .get_msglevel = rionet_get_msglevel,
436 .set_msglevel = rionet_set_msglevel,
437 .get_link = ethtool_op_get_link,
438};
439
Alexander Beregalova33a2bb2009-04-15 12:52:56 +0000440static const struct net_device_ops rionet_netdev_ops = {
441 .ndo_open = rionet_open,
442 .ndo_stop = rionet_close,
443 .ndo_start_xmit = rionet_start_xmit,
444 .ndo_change_mtu = eth_change_mtu,
445 .ndo_validate_addr = eth_validate_addr,
446 .ndo_set_mac_address = eth_mac_addr,
447};
448
Yinglin Luan55caa922011-06-25 18:12:12 +0000449static int rionet_setup_netdev(struct rio_mport *mport, struct net_device *ndev)
Matt Porterf89efd52005-09-09 12:10:10 -0700450{
451 int rc = 0;
Matt Porterf89efd52005-09-09 12:10:10 -0700452 struct rionet_private *rnet;
453 u16 device_id;
Akinobu Mitaacc65632012-03-30 01:01:46 +0000454 const size_t rionet_active_bytes = sizeof(void *) *
455 RIO_MAX_ROUTE_ENTRIES(mport->sys_size);
Matt Porterf89efd52005-09-09 12:10:10 -0700456
Alexandre Bounine2fb717e2012-10-04 17:16:11 -0700457 nets[mport->id].active = (struct rio_dev **)__get_free_pages(GFP_KERNEL,
458 get_order(rionet_active_bytes));
459 if (!nets[mport->id].active) {
Zhang Weie0423232008-04-18 13:33:42 -0700460 rc = -ENOMEM;
461 goto out;
462 }
Alexandre Bounine2fb717e2012-10-04 17:16:11 -0700463 memset((void *)nets[mport->id].active, 0, rionet_active_bytes);
Zhang Weie0423232008-04-18 13:33:42 -0700464
Matt Porterf89efd52005-09-09 12:10:10 -0700465 /* Set up private area */
Wang Chen4cf16532008-11-12 23:38:14 -0800466 rnet = netdev_priv(ndev);
Matt Porterf89efd52005-09-09 12:10:10 -0700467 rnet->mport = mport;
468
469 /* Set the default MAC address */
470 device_id = rio_local_get_device_id(mport);
471 ndev->dev_addr[0] = 0x00;
472 ndev->dev_addr[1] = 0x01;
473 ndev->dev_addr[2] = 0x00;
474 ndev->dev_addr[3] = 0x01;
475 ndev->dev_addr[4] = device_id >> 8;
476 ndev->dev_addr[5] = device_id & 0xff;
477
Alexander Beregalova33a2bb2009-04-15 12:52:56 +0000478 ndev->netdev_ops = &rionet_netdev_ops;
Matt Porterf89efd52005-09-09 12:10:10 -0700479 ndev->mtu = RIO_MAX_MSG_SIZE - 14;
480 ndev->features = NETIF_F_LLTX;
481 SET_ETHTOOL_OPS(ndev, &rionet_ethtool_ops);
482
Matt Porterf89efd52005-09-09 12:10:10 -0700483 spin_lock_init(&rnet->lock);
484 spin_lock_init(&rnet->tx_lock);
485
486 rnet->msg_enable = RIONET_DEFAULT_MSGLEVEL;
487
488 rc = register_netdev(ndev);
489 if (rc != 0)
490 goto out;
491
Alexandre Bounine2fb717e2012-10-04 17:16:11 -0700492 printk(KERN_INFO "%s: %s %s Version %s, MAC %pM, %s\n",
Matt Porterf89efd52005-09-09 12:10:10 -0700493 ndev->name,
494 DRV_NAME,
495 DRV_DESC,
496 DRV_VERSION,
Alexandre Bounine2fb717e2012-10-04 17:16:11 -0700497 ndev->dev_addr,
498 mport->name);
Matt Porterf89efd52005-09-09 12:10:10 -0700499
500 out:
501 return rc;
502}
503
Alexandre Bounine2fb717e2012-10-04 17:16:11 -0700504static unsigned long net_table[RIONET_MAX_NETS/sizeof(unsigned long) + 1];
505
Matt Porterf89efd52005-09-09 12:10:10 -0700506static int rionet_probe(struct rio_dev *rdev, const struct rio_device_id *id)
507{
508 int rc = -ENODEV;
Alexandre Bounine284fb682011-08-25 15:59:13 -0700509 u32 lsrc_ops, ldst_ops;
Matt Porterf89efd52005-09-09 12:10:10 -0700510 struct rionet_peer *peer;
Yinglin Luan55caa922011-06-25 18:12:12 +0000511 struct net_device *ndev = NULL;
Alexandre Bounine2fb717e2012-10-04 17:16:11 -0700512 unsigned char netid = rdev->net->hport->id;
513 int oldnet;
Matt Porterf89efd52005-09-09 12:10:10 -0700514
Alexandre Bounine2fb717e2012-10-04 17:16:11 -0700515 if (netid >= RIONET_MAX_NETS)
516 return rc;
Matt Porterf89efd52005-09-09 12:10:10 -0700517
Alexandre Bounine2fb717e2012-10-04 17:16:11 -0700518 oldnet = test_and_set_bit(netid, net_table);
Yinglin Luan55caa922011-06-25 18:12:12 +0000519
Matt Porterf89efd52005-09-09 12:10:10 -0700520 /*
521 * First time through, make sure local device is rionet
Alexandre Bounine2fb717e2012-10-04 17:16:11 -0700522 * capable, setup netdev (will be skipped on later probes)
Matt Porterf89efd52005-09-09 12:10:10 -0700523 */
Alexandre Bounine2fb717e2012-10-04 17:16:11 -0700524 if (!oldnet) {
Matt Porterf89efd52005-09-09 12:10:10 -0700525 rio_local_read_config_32(rdev->net->hport, RIO_SRC_OPS_CAR,
526 &lsrc_ops);
527 rio_local_read_config_32(rdev->net->hport, RIO_DST_OPS_CAR,
528 &ldst_ops);
Alexandre Bounine284fb682011-08-25 15:59:13 -0700529 if (!is_rionet_capable(lsrc_ops, ldst_ops)) {
Matt Porterf89efd52005-09-09 12:10:10 -0700530 printk(KERN_ERR
Alexandre Bounine2fb717e2012-10-04 17:16:11 -0700531 "%s: local device %s is not network capable\n",
532 DRV_NAME, rdev->net->hport->name);
Matt Porterf89efd52005-09-09 12:10:10 -0700533 goto out;
534 }
535
Alexandre Bounine2fb717e2012-10-04 17:16:11 -0700536 /* Allocate our net_device structure */
537 ndev = alloc_etherdev(sizeof(struct rionet_private));
538 if (ndev == NULL) {
539 rc = -ENOMEM;
540 goto out;
541 }
542 nets[netid].ndev = ndev;
Yinglin Luan55caa922011-06-25 18:12:12 +0000543 rc = rionet_setup_netdev(rdev->net->hport, ndev);
Alexandre Bounine2fb717e2012-10-04 17:16:11 -0700544 INIT_LIST_HEAD(&nets[netid].peers);
545 nets[netid].nact = 0;
546 } else if (nets[netid].ndev == NULL)
547 goto out;
Matt Porterf89efd52005-09-09 12:10:10 -0700548
549 /*
550 * If the remote device has mailbox/doorbell capabilities,
551 * add it to the peer list.
552 */
553 if (dev_rionet_capable(rdev)) {
554 if (!(peer = kmalloc(sizeof(struct rionet_peer), GFP_KERNEL))) {
555 rc = -ENOMEM;
556 goto out;
557 }
558 peer->rdev = rdev;
Alexandre Bounine2fb717e2012-10-04 17:16:11 -0700559 list_add_tail(&peer->node, &nets[netid].peers);
Matt Porterf89efd52005-09-09 12:10:10 -0700560 }
561
Alexandre Bounine2fb717e2012-10-04 17:16:11 -0700562 rio_set_drvdata(rdev, nets[netid].ndev);
Yinglin Luan55caa922011-06-25 18:12:12 +0000563
Matt Porterf89efd52005-09-09 12:10:10 -0700564 out:
565 return rc;
566}
567
568static struct rio_device_id rionet_id_table[] = {
569 {RIO_DEVICE(RIO_ANY_ID, RIO_ANY_ID)}
570};
571
572static struct rio_driver rionet_driver = {
573 .name = "rionet",
574 .id_table = rionet_id_table,
575 .probe = rionet_probe,
576 .remove = rionet_remove,
577};
578
579static int __init rionet_init(void)
580{
581 return rio_register_driver(&rionet_driver);
582}
583
584static void __exit rionet_exit(void)
585{
586 rio_unregister_driver(&rionet_driver);
587}
588
Alexandre Bounine2f809982011-03-23 16:43:04 -0700589late_initcall(rionet_init);
Matt Porterf89efd52005-09-09 12:10:10 -0700590module_exit(rionet_exit);